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// **********************************************************************
//
// Copyright (c) 2003-2014 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
package IceInternal;
final public class Protocol
{
//
// Size of the Ice protocol header
//
// Magic number (4 bytes)
// Protocol version major (Byte)
// Protocol version minor (Byte)
// Encoding version major (Byte)
// Encoding version minor (Byte)
// Message type (Byte)
// Compression status (Byte)
// Message size (Int)
//
public final static int headerSize = 14;
//
// The magic number at the front of each message
//
public final static byte magic[] = { 0x49, 0x63, 0x65, 0x50 }; // 'I', 'c', 'e', 'P'
//
// The current Ice protocol and encoding version
//
public final static byte protocolMajor = 1;
public final static byte protocolMinor = 0;
public final static byte protocolEncodingMajor = 1;
public final static byte protocolEncodingMinor = 0;
public final static byte encodingMajor = 1;
public final static byte encodingMinor = 1;
//
// The Ice protocol message types
//
public final static byte requestMsg = 0;
public final static byte requestBatchMsg = 1;
public final static byte replyMsg = 2;
public final static byte validateConnectionMsg = 3;
public final static byte closeConnectionMsg = 4;
public final static byte[] requestHdr =
{
IceInternal.Protocol.magic[0],
IceInternal.Protocol.magic[1],
IceInternal.Protocol.magic[2],
IceInternal.Protocol.magic[3],
IceInternal.Protocol.protocolMajor,
IceInternal.Protocol.protocolMinor,
IceInternal.Protocol.protocolEncodingMajor,
IceInternal.Protocol.protocolEncodingMinor,
IceInternal.Protocol.requestMsg,
(byte)0, // Compression status.
(byte)0, (byte)0, (byte)0, (byte)0, // Message size (placeholder).
(byte)0, (byte)0, (byte)0, (byte)0 // Request ID (placeholder).
};
public final static byte[] requestBatchHdr =
{
IceInternal.Protocol.magic[0],
IceInternal.Protocol.magic[1],
IceInternal.Protocol.magic[2],
IceInternal.Protocol.magic[3],
IceInternal.Protocol.protocolMajor,
IceInternal.Protocol.protocolMinor,
IceInternal.Protocol.protocolEncodingMajor,
IceInternal.Protocol.protocolEncodingMinor,
IceInternal.Protocol.requestBatchMsg,
0, // Compression status.
(byte)0, (byte)0, (byte)0, (byte)0, // Message size (placeholder).
(byte)0, (byte)0, (byte)0, (byte)0 // Number of requests in batch (placeholder).
};
public final static byte[] replyHdr =
{
IceInternal.Protocol.magic[0],
IceInternal.Protocol.magic[1],
IceInternal.Protocol.magic[2],
IceInternal.Protocol.magic[3],
IceInternal.Protocol.protocolMajor,
IceInternal.Protocol.protocolMinor,
IceInternal.Protocol.protocolEncodingMajor,
IceInternal.Protocol.protocolEncodingMinor,
IceInternal.Protocol.replyMsg,
(byte)0, // Compression status.
(byte)0, (byte)0, (byte)0, (byte)0 // Message size (placeholder).
};
static final public Ice.ProtocolVersion currentProtocol = new Ice.ProtocolVersion(protocolMajor, protocolMinor);
static final public Ice.EncodingVersion currentProtocolEncoding = new Ice.EncodingVersion(protocolEncodingMajor,
protocolEncodingMinor);
static final public Ice.EncodingVersion currentEncoding = new Ice.EncodingVersion(encodingMajor, encodingMinor);
static public void
checkSupportedProtocol(Ice.ProtocolVersion v)
{
if(v.major != currentProtocol.major || v.minor > currentProtocol.minor)
{
throw new Ice.UnsupportedProtocolException("", v, currentProtocol);
}
}
static public void
checkSupportedProtocolEncoding(Ice.EncodingVersion v)
{
if(v.major != currentProtocolEncoding.major || v.minor > currentProtocolEncoding.minor)
{
throw new Ice.UnsupportedEncodingException("", v, currentProtocolEncoding);
}
}
static public void
checkSupportedEncoding(Ice.EncodingVersion v)
{
if(v.major != currentEncoding.major || v.minor > currentEncoding.minor)
{
throw new Ice.UnsupportedEncodingException("", v, currentEncoding);
}
}
//
// Either return the given protocol if not compatible, or the greatest
// supported protocol otherwise.
//
static public Ice.ProtocolVersion
getCompatibleProtocol(Ice.ProtocolVersion v)
{
if(v.major != currentProtocol.major)
{
return v; // Unsupported protocol, return as is.
}
else if(v.minor < currentProtocol.minor)
{
return v; // Supported protocol.
}
else
{
//
// Unsupported but compatible, use the currently supported
// protocol, that's the best we can do.
//
return currentProtocol;
}
}
//
// Either return the given encoding if not compatible, or the greatest
// supported encoding otherwise.
//
static public Ice.EncodingVersion
getCompatibleEncoding(Ice.EncodingVersion v)
{
if(v.major != currentEncoding.major)
{
return v; // Unsupported encoding, return as is.
}
else if(v.minor < currentEncoding.minor)
{
return v; // Supported encoding.
}
else
{
//
// Unsupported but compatible, use the currently supported
// encoding, that's the best we can do.
//
return currentEncoding;
}
}
static public boolean
isSupported(Ice.EncodingVersion version, Ice.EncodingVersion supported)
{
return version.major == supported.major && version.minor <= supported.minor;
}
}
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