public static byte[] Length(this ICanBeSent message)
{
return
(message.SentData == null
? new byte[] { 0, 0, 0, 0 }
: BitConverter.GetBytes(message.SentData.Length).ReverseIfNeed());
}
public static byte[] СommandBytes(this ICanBeSent message)
{
if (message.Command.Length > 12)
{
throw new Exception("command.Length>12 command=" + message.Command);
}
byte[] ascii = Encoding.ASCII.GetBytes(message.Command);
byte[] result = new byte[12];
Buffer.BlockCopy(ascii, 0, result, 0, ascii.Length);
return(result);
}
public static byte[] GetFullMsg(this ICanBeSent message)
{
using (MemoryStream ms = new MemoryStream())
using (BinaryWriter bw = new BinaryWriter(ms))
{
bw.Write(message.Magic());
bw.Write(message.СommandBytes());
bw.Write(message.Length());
bw.Write(message.Checksum());
if (message.SentData != null)
{
bw.Write(message.SentData);
}
return(ms.ToArray());
}
}
public void Send(ICanBeSent message)
{
try
{
if (BinaryWriter != null)
{
lock (BinaryWriter)
{
BinaryWriter.Write(message.GetFullMsg());
BinaryWriter.Flush();
}
}
}
catch (Exception e)
{
throw new Exception("Cоединение потерено", e);
}
}
public static byte[] Checksum(this ICanBeSent message)
{
if (message.SentData == null)
{
return(_nullChecksum);
}
if (message.SentData.Length == 0)
{
return(_nullChecksum);
}
byte[] hash;
using (var sha512 = new SHA512Managed())
hash = sha512.ComputeHash(message.SentData);
byte[] result = new byte[4];
Buffer.BlockCopy(hash, 0, result, 0, 4);
return(result);
}
public void Send(ICanBeSent message)
{
try
{
if (BinaryWriter != null)
lock (BinaryWriter)
{
BinaryWriter.Write(message.GetFullMsg());
BinaryWriter.Flush();
}
}
catch (Exception e)
{
throw new Exception("Cоединение потерено", e);
}
}
public static byte[] Magic(this ICanBeSent message)
{
return(_magic);
}
