* gnu/classpath/jdwp/transport/JdwpPacket.java: New file.
* gnu/classpath/jdwp/transport/JdwpCommandPacket.java: New file.
* gnu/classpath/jdwp/transport/JdwpReplyPacket.java: New file.
From-SVN: r100463
+2005-06-01 Keith Seitz <keiths@redhat.com>
+
+ * gnu/classpath/jdwp/transport/JdwpPacket.java: New file.
+ * gnu/classpath/jdwp/transport/JdwpCommandPacket.java: New file.
+ * gnu/classpath/jdwp/transport/JdwpReplyPacket.java: New file.
+
2005-06-01 Tom Tromey <tromey@redhat.com>
PR libgcj/21785:
--- /dev/null
+/* JdwpCommandPacket.java -- JDWP command packet
+ Copyright (C) 2005 Free Software Foundation
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package gnu.classpath.jdwp.transport;
+
+/**
+ * A class representing a JDWP command packet.
+ * This class adds command set and command to the packet header
+ * information in {@link gnu.classpath.jdwp.transport.JdwpPacket}
+ * and adds additional command packet-specific processing.
+ *
+ * @author Keith Seitz <keiths@redhat.com>
+ */
+public class JdwpCommandPacket extends JdwpPacket
+{
+ /**
+ * Command set
+ */
+ protected byte _commandSet;
+
+ /**
+ * Command
+ */
+ protected byte _command;
+
+ // Minimum packet size [excluding super class]
+ // ( commandSet (1) + command (1) )
+ private static final int MINIMUM_LENGTH = 2;
+
+ /**
+ * Constructs a new <code>JdwpCommandPacket</code>
+ */
+ public JdwpCommandPacket ()
+ {
+ // Don't assign an id. This constructor is called by
+ // JdwpPacket.fromBytes, and that will assign a packet id.
+ }
+
+ /**
+ * Constructs a new <code>JdwpCommandPacket</code>
+ * with the given command set and command
+ *
+ * @param set the command set
+ * @param command the command
+ */
+ public JdwpCommandPacket (byte set, byte command)
+ {
+ _id = ++_last_id;
+ _commandSet = set;
+ _command = command;
+ }
+
+ /**
+ * Retuns the length of this packet
+ */
+ public int getLength ()
+ {
+ return MINIMUM_LENGTH + super.getLength ();
+ }
+
+ /**
+ * Returns the command set
+ */
+ public byte getCommandSet ()
+ {
+ return _commandSet;
+ }
+
+ /**
+ * Sets the command set
+ */
+ public void setCommandSet (byte cs)
+ {
+ _commandSet = cs;
+ }
+
+ /**
+ * Returns the command
+ */
+ public byte getCommand ()
+ {
+ return _command;
+ }
+
+ /**
+ * Sets the command
+ */
+ public void setCommand (byte cmd)
+ {
+ _command = cmd;
+ }
+
+ // Reads command packet data from the given buffer, starting
+ // at the given offset
+ protected int myFromBytes (byte[] bytes, int index)
+ {
+ int i = 0;
+ setCommandSet (bytes[index + i++]);
+ setCommand (bytes[index + i++]);
+ return i;
+ }
+
+ // Writes the command packet data into the given buffer
+ protected int myToBytes (byte[] bytes, int index)
+ {
+ // Need to add command set & command
+ int i = 0;
+ bytes[index + i++] = getCommandSet ();
+ bytes[index + i++] = getCommand ();
+
+ return i;
+ }
+}
--- /dev/null
+/* JdwpPacket.java -- Base class for JDWP command and reply packets
+ Copyright (C) 2005 Free Software Foundation
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package gnu.classpath.jdwp.transport;
+
+/**
+ * All command and reply packets in JDWP share
+ * common header type information:
+ *
+ * length (4 bytes) : size of entire packet, including length
+ * id (4 bytes) : unique packet id
+ * flags (1 byte) : flag byte
+ * [command packet stuff | reply packet stuff]
+ * data (variable) : unique command-/reply-specific data
+ *
+ * This class deal with everything except the command- and reply-specific
+ * data, which get handled in {@link
+ * gnu.classpath.jdwp.transport.JdwpCommandPacket} and {@link
+ * gnu.classpath.jdwp.transprot.JdwpReplyPacket}.
+ *
+ * @author Keith Seitz <keiths@redhat.com>
+ */
+public abstract class JdwpPacket
+{
+ // Last id of packet constructed
+ protected static int _last_id = 0;
+
+ // JDWP reply packet flag
+ protected static final int JDWP_FLAG_REPLY = 0x80;
+
+ /**
+ * Minimum packet size excluding sub-class data
+ * ( length (4) + id (4) + flags (1) )
+ */
+ protected static final int MINIMUM_SIZE = 9;
+
+ /**
+ * Id of command/reply
+ */
+ protected int _id;
+
+ /**
+ * Packet flags
+ */
+ protected byte _flags;
+
+ /**
+ * Packet-specific data
+ */
+ protected byte[] _data;
+
+ /**
+ * Constructor
+ */
+ public JdwpPacket ()
+ {
+ // By default, DON'T assign an id. This way when a packet
+ // is constructed from fromBytes, _last_id won't increment (i.e.,
+ // it won't leave holes in the outgoing packet ids).
+ }
+
+ /**
+ * Constructs a <code>JdwpPacket</code> with the id
+ * from the given packet.
+ *
+ * @param pkt a packet whose id will be used in this new packet
+ */
+ public JdwpPacket (JdwpPacket pkt)
+ {
+ _id = pkt.getId ();
+ }
+
+ /**
+ * Returns the packet id
+ */
+ public int getId ()
+ {
+ return _id;
+ }
+
+ /**
+ * Sets the packet id
+ */
+ public void setId (int id)
+ {
+ _id = id;
+ }
+
+ /**
+ * Returns the packet flags
+ */
+ public byte getFlags ()
+ {
+ return _flags;
+ }
+
+ /**
+ * Sets the packet flags
+ */
+ public void setFlags (byte flags)
+ {
+ _flags = flags;
+ }
+
+ /**
+ * Gets the command/reply-specific data in this packet
+ */
+ public byte[] getData ()
+ {
+ return _data;
+ }
+
+ /**
+ * Sets the command/reply-specific data in this packet
+ */
+ public void setData (byte[] data)
+ {
+ _data = data;
+ }
+
+ /**
+ * Returns the length of this entire packet
+ */
+ public int getLength ()
+ {
+ return MINIMUM_SIZE + (_data == null ? 0 : _data.length);
+ }
+
+ /**
+ * Allow subclasses to initialize from data
+ *
+ * @param bytes packet data from the wire
+ * @param index index into <code>bytes</code> to start processing
+ * @return number of bytes in <code>bytes</code> processed
+ */
+ protected abstract int myFromBytes (byte[] bytes, int index);
+
+ /**
+ * Convert the given bytes into a <code>JdwpPacket</code>. Uses the
+ * abstract method <code>myFromBytes</code> to allow subclasses to
+ * process data.
+ *
+ * If the given data does not represent a valid JDWP packet, it returns
+ * <code>null</code>.
+ *
+ * @param bytes packet data from the wire
+ * @param index index into <code>bytes</code> to start processing
+ * @return number of bytes in <code>bytes</code> processed
+ */
+ public static JdwpPacket fromBytes (byte[] bytes)
+ {
+ int i = 0;
+ int length = ((bytes[i++] & 0xff) << 24 | (bytes[i++] & 0xff) << 16
+ | (bytes[i++] & 0xff) << 8 | (bytes[i++] 0xff));
+ int id = 0;
+ byte flags = 0;
+
+ if (bytes.length == length)
+ {
+ id = ((bytes[i++] & 0xff) << 24 | (bytes[i++] & 0xff) << 16
+ | (bytes[i++] & 0xff) << 8 | (bytes[i++] & 0xff));
+ flags = bytes[i++];
+
+ Class clazz = null;
+ if (flags == 0)
+ clazz = JdwpCommandPacket.class;
+ else if ((flags & JDWP_FLAG_REPLY) != 0)
+ clazz = JdwpReplyPacket.class;
+ else
+ {
+ // Malformed packet. Discard it.
+ return null;
+ }
+
+ JdwpPacket pkt = null;
+ try
+ {
+ pkt = (JdwpPacket) clazz.newInstance ();
+ }
+ catch (InstantiationException ie)
+ {
+ // Discard packet
+ return null;
+ }
+ catch (IllegalAccessException iae)
+ {
+ // Discard packet
+ return null;
+ }
+
+ pkt.setId (id);
+ pkt.setFlags (flags);
+
+ i += pkt.myFromBytes (bytes, i);
+ byte[] data = new byte[length - i];
+ System.arraycopy (bytes, i, data, 0, data.length);
+ pkt.setData (data);
+
+ return pkt;
+ }
+
+ return null;
+ }
+
+ // Put subclass information into bytes
+ protected abstract int myToBytes (byte[] bytes, int index);
+
+ // Convert this packet to it byte representation (ready to send on the wire)
+ // NOTE: All integers should be big-endian.
+ public byte[] toBytes ()
+ {
+ // Allocate a new array to hold contents of packet
+ int length = getLength ();
+ byte[] bytes = new byte[length];
+
+ int i = 0;
+
+ //
+ // Packet layout: length, id, flags, packet-specific, data (optional)
+ //
+
+ // length
+ bytes[i++] = (byte) (length >>> 24);
+ bytes[i++] = (byte) (length >>> 16);
+ bytes[i++] = (byte) (length >>> 8);
+ bytes[i++] = (byte) length;
+
+ // id
+ bytes[i++] = (byte) (getId () >>> 24);
+ bytes[i++] = (byte) (getId () >>> 16);
+ bytes[i++] = (byte) (getId () >>> 8);
+ bytes[i++] = (byte) getId ();
+
+ // flag
+ bytes[i++] = getFlags ();
+
+ // packet-specific stuff
+ i += myToBytes (bytes, i);
+
+ // data (if any)
+ byte[] data = getData ();
+ if (data.length > 0 && i < length)
+ {
+ // Would it pay to be over cautious?
+ System.arraycopy (data, 0, bytes, i, data.length);
+ }
+
+ return bytes;
+ }
+}
--- /dev/null
+/* JdwpReplyPacket.java -- JDWP reply packet
+ Copyright (C) 2005 Free Software Foundation
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package gnu.classpath.jdwp.transport;
+
+/**
+ * A class represents a JDWP reply packet.
+ * This class adds an error code to the packet header information
+ * in {@link gnu.classpath.transport.JdwpPacket} and adds additional
+ * reply packet-specific processing.
+ *
+ * @author Keith Seitz <keiths@redhat.com>
+ */
+public class JdwpReplyPacket extends JdwpPacket
+{
+ /**
+ * Error code
+ */
+ protected short _errorCode;
+
+ // Minimum packet size [excluding super class] ( errorCode (2) )
+ private static final int MINIMUM_LENGTH = 2;
+
+ /**
+ * Constructs a <code>JdwpReplyPacket</code>.
+ */
+ public JdwpReplyPacket ()
+ {
+ // Don't assign a packet id. This is called by JdwpPacket.fromBytes
+ // which assigns a packet id. (Not that a VM would do that...)
+ }
+
+ /**
+ * Constructs a <code>JdwpReplyPacket</code> with the
+ * id from the given packet and error code
+ *
+ * @param pkt the packet whose id this packet will use
+ * @param errorCode the error code
+ */
+ public JdwpReplyPacket (JdwpPacket pkt, short errorCode)
+ {
+ super (pkt);
+ _flags = (byte) JDWP_FLAG_REPLY;
+ _errorCode = errorCode;
+ }
+
+ /**
+ * Returns the length of this packet
+ */
+ public int getLength ()
+ {
+ return MINIMUM_LENGTH + super.getLength ();
+ }
+
+ /**
+ * Returns the error code
+ */
+ public short getErrorCode ()
+ {
+ return _errorCode;
+ }
+
+ /**
+ * Sets the error code
+ */
+ public void setErrorCode (short ec)
+ {
+ _errorCode = ec;
+ }
+
+ // Reads command packet data from the given buffer, starting
+ // at the given offset
+ protected int myFromBytes (byte[] bytes, int index)
+ {
+ int i = 0;
+ setErrorCode ((short) ((bytes[index + i++] & 0xff) << 8
+ | (bytes[index + i++] & 0xff)));
+ return i;
+ }
+
+ // Writes the command packet data into the given buffer
+ protected int myToBytes (byte[] bytes, int index)
+ {
+ // Need to add error code
+ int i = 0;
+ bytes[index + i++] = (byte) (getErrorCode () >>> 8);
+ bytes[index + i++] = (byte) getErrorCode ();
+
+ return i;
+ }
+}
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