protected ushort ReadShort(ref int index, HProtocol protocol)
{
if (index >= Body.Length || index + 2 > Body.Length)
{
return(0);
}
var chunk = new byte[] { Body[index++], Body[index++] };
return(Protocol == HProtocol.Ancient ? Ancient.DecypherShort(chunk) : Modern.DecypherShort(chunk));
}
protected int ReadInt(ref int index, HProtocol protocol)
{
if (index >= Body.Length)
{
return(0);
}
switch (Protocol)
{
case HProtocol.Modern:
{
if (index + 4 > Body.Length)
{
return(0);
}
return(Modern.DecypherInt(Body[index++], Body[index++], Body[index++], Body[index++]));
}
case HProtocol.Ancient:
{
int length = (Body[index] >> 3) & 7;
if (length < 1)
{
length++;
}
if (index + length > Body.Length)
{
return(0);
}
int value = Ancient.DecypherInt(Body, index);
index += length;
return(value);
}
default: return(0);
}
}
public HMessage(byte[] data, HDestination destination)
: this()
{
if (data == null)
{
throw new NullReferenceException();
}
if (data.Length < 1)
{
throw new Exception("The minimum amount of bytes required to initialize an HMessage instance is 1(One). If the amount of bytes passed is < 3(Three), and >= 1(One), it will be immediately be identified as a corrupted packet. { IsCorrupted = true }");
}
Destination = destination;
bool hasByteZero = data.Contains(byte.MinValue);
bool isAncientHeader = !hasByteZero && data.Length == 2 && data[1] != 1;
if (!isAncientHeader && data.Length >= 6 && Modern.DecypherInt(data) == data.Length - 4)
{
Protocol = HProtocol.Modern;
_header = Modern.DecypherShort(data, 4);
Append(ByteUtils.CopyBlock(data, 4, data.Length - 4));
if (data.Length == 6)
{
_logWriting = true;
}
}
else if ((destination == HDestination.Server && isAncientHeader) || (!hasByteZero && data.Length >= 5 && Ancient.DecypherShort(data, 1) == data.Length - 3))
{
Destination = HDestination.Server;
Protocol = HProtocol.Ancient;
_header = Ancient.DecypherShort(data, isAncientHeader ? 0 : 3);
Append(isAncientHeader ? data : ByteUtils.CopyBlock(data, 3, data.Length - 3));
if (data.Length == 5 || isAncientHeader)
{
_logWriting = true;
}
}
else if (isAncientHeader || (!hasByteZero && data.Length >= 3 && data[data.Length - 1] == 1 && Destination != HDestination.Server))
{
Destination = HDestination.Client;
Protocol = HProtocol.Ancient;
if (isAncientHeader)
{
data = new byte[] { data[0], data[1], 1 }
}
;
_header = Ancient.DecypherShort(data);
Append(data);
if (data.Length == 3 || isAncientHeader)
{
_logWriting = true;
}
}
else
{
Body = data;
_bufferCache = data;
IsCorrupted = true;
Length = data.Length;
_buffer.AddRange(data);
_stringCache = ToString(data);
}
}
public static byte[] Construct(ushort header, HDestination destination, HProtocol protocol, params object[] chunks)
{
var buffer = new List <byte>();
bool isAncient = (protocol == HProtocol.Ancient);
if (isAncient && destination == HDestination.Server)
{
buffer.Add(64);
}
buffer.AddRange(protocol == HProtocol.Ancient ? Ancient.CypherShort(header) : Modern.CypherShort(header));
buffer.AddRange(ConstructBody(destination, protocol, chunks));
if (!isAncient || destination == HDestination.Server)
{
buffer.InsertRange(isAncient ? 1 : 0, isAncient ? Ancient.CypherShort((ushort)(buffer.Count - 1)) : Modern.CypherInt(buffer.Count));
}
else if (buffer[buffer.Count - 1] != 1)
{
buffer.Add(1);
}
return(buffer.ToArray());
}
public static byte[] ConstructBody(HDestination destination, HProtocol protocol, params object[] chunks)
{
var buffer = new List <byte>();
bool isAncient = (protocol == HProtocol.Ancient);
for (int i = 0; i < chunks.Length; i++)
{
object chunk = chunks[i];
if (chunk == null)
{
throw new NullReferenceException(string.Format("Unable to encode a null object. {{ Index = {0} }}", i));
}
var data = chunk as byte[];
if (data != null)
{
buffer.AddRange(data);
}
else
{
switch (Type.GetTypeCode(chunk.GetType()))
{
case TypeCode.Int32:
{
var value = (int)chunk;
buffer.AddRange(protocol == HProtocol.Ancient ? Ancient.CypherInt(value) : Modern.CypherInt(value));
break;
}
case TypeCode.Boolean:
{
var value = (bool)chunk;
buffer.Add(isAncient ? (byte)(value ? 73 : 72) : Convert.ToByte(value));
break;
}
case TypeCode.Byte:
{
var value = (byte)chunk;
buffer.Add(value);
break;
}
default:
{
string value = chunk.ToString();
if (!isAncient || destination == HDestination.Server)
{
ushort valueLength = (ushort)value.Length;
buffer.AddRange(protocol == HProtocol.Ancient ? Ancient.CypherShort(valueLength) : Modern.CypherShort(valueLength));
buffer.AddRange(Encoding.Default.GetBytes(value));
}
else
{
buffer.AddRange(Encoding.Default.GetBytes(value));
buffer.Add(2);
}
break;
}
}
}
}
return(buffer.ToArray());
}
public static byte[][] Split(ref byte[] cache, byte[] data, HDestination destination, HProtocol protocol)
{
lock (SplitLock)
{
if (cache != null)
{
data = Merge(cache, data);
cache = null;
}
var chunks = new List <byte[]>();
if (protocol == HProtocol.Ancient && destination == HDestination.Client)
{
if (!data.Contains((byte)1))
{
cache = data;
}
else
{
var buffer = new List <byte>();
foreach (byte value in data)
{
buffer.Add(value);
if (value == 1)
{
chunks.Add(buffer.ToArray());
buffer.Clear();
}
}
if (buffer.Count > 0)
{
cache = buffer.ToArray();
}
}
}
else
{
bool isAncient = (protocol == HProtocol.Ancient);
int offset = isAncient ? 3 : 4;
int length = isAncient ? Ancient.DecypherShort(data, 1) : Modern.DecypherInt(data);
if (length == data.Length - offset)
{
chunks.Add(data);
}
else
{
do
{
if (length > data.Length - offset)
{
cache = data; break;
}
chunks.Add(CutBlock(ref data, 0, length + offset));
if (data.Length >= offset)
{
length = isAncient ? Ancient.DecypherShort(data, 1) : Modern.DecypherInt(data);
}
}while (data.Length != 0);
}
}
return(chunks.ToArray());
}
}
