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ahmed
2025-09-04 19:13:14 +03:00
parent 47c3f9f926
commit a2a7ff445c
14 changed files with 603 additions and 524 deletions
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287
Esiur/Data/TDU.cs Normal file
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using Esiur.Net.IIP;
using System;
using System.Collections.Generic;
using System.Text;
using System.Xml.Linq;
using System.Xml.Schema;
using static Esiur.Data.Codec;
namespace Esiur.Data;
// Transmission Data Unit
public struct TDU
{
public TDUIdentifier Identifier;
//public int Index;
public TDUClass Class;
//public ulong ContentLength;
public byte[] Composed;
//public uint Offset;
public byte[] Metadata;
//public ulong Size
//{
// get
// {
// if (TotalSize != ulong.MaxValue)
// return TotalSize;
// else
// {
// if (ContentLength <= 0xFF)
// return 2 + ContentLength;
// else if (ContentLength <= 0xFF_FF)
// return 3 + ContentLength;
// else if (ContentLength <= 0xFF_FF_FF)
// return 4 + ContentLength;
// else if (ContentLength <= 0xFF_FF_FF_FF)
// return 5 + ContentLength;
// else if (ContentLength <= 0xFF_FF_FF_FF_FF)
// return 6 + ContentLength;
// else if (ContentLength <= 0xFF_FF_FF_FF_FF_FF)
// return 7 + ContentLength;
// else if (ContentLength <= 0xFF_FF_FF_FF_FF_FF_FF)
// return 8 + ContentLength;
// else //if (ContentLength <= 0xFF_FF_FF_FF_FF_FF_FF_FF)
// return 9 + ContentLength;
// }
// }
//}
//private ulong TotalSize;
public TDU()
{
}
public TDU(TDUIdentifier identifier)
{
Identifier = identifier;
}
public TDU(TDUIdentifier identifier,
byte[] data, ulong length, byte[] metadata = null)
{
Identifier = identifier;
//Index = (byte)identifier & 0x7;
Class = (TDUClass)((byte)identifier >> 6);
Metadata = metadata;
if (Class == TDUClass.Fixed)
{
Composed = DC.Combine(new byte[] { (byte)Identifier }, 0, 1, data, 0, (uint)length);
}
else if (Class == TDUClass.Dynamic
|| Class == TDUClass.Extension)
{
if (length == 0)
{
Composed = new byte[1] { (byte)Identifier };
}
else if (length <= 0xFF)
{
Composed = new byte[2 + length];
Composed[0] = (byte)((byte)Identifier | 0x8);
Composed[1] = (byte)length;
Buffer.BlockCopy(data, 0, Composed, 2, (int)length);
}
else if (length <= 0xFF_FF)
{
var Composed = new byte[3 + length];
Composed[0] = (byte)((byte)Identifier | 0x10);
Composed[1] = (byte)((length >> 8) & 0xFF);
Composed[2] = (byte)(length & 0xFF);
Buffer.BlockCopy(data, 0, Composed, 3, (int)length);
}
else if (length <= 0xFF_FF_FF)
{
Composed = new byte[4 + length];
Composed[0] = (byte)((byte)Identifier | 0x18);
Composed[1] = (byte)((length >> 16) & 0xFF);
Composed[2] = (byte)((length >> 8) & 0xFF);
Composed[3] = (byte)(length & 0xFF);
Buffer.BlockCopy(data, 0, Composed, 4, (int)length);
}
else if (length <= 0xFF_FF_FF_FF)
{
Composed = new byte[5 + length];
Composed[0] = (byte)((byte)Identifier | 0x20);
Composed[1] = (byte)((length >> 24) & 0xFF);
Composed[2] = (byte)((length >> 16) & 0xFF);
Composed[3] = (byte)((length >> 8) & 0xFF);
Composed[4] = (byte)(length & 0xFF);
Buffer.BlockCopy(data, 0, Composed, 5, (int)length);
}
else if (length <= 0xFF_FF_FF_FF_FF)
{
Composed = new byte[6 + length];
Composed[0] = (byte)((byte)Identifier | 0x28);
Composed[1] = (byte)((length >> 32) & 0xFF);
Composed[2] = (byte)((length >> 24) & 0xFF);
Composed[3] = (byte)((length >> 16) & 0xFF);
Composed[4] = (byte)((length >> 8) & 0xFF);
Composed[5] = (byte)(length & 0xFF);
Buffer.BlockCopy(data, 0, Composed, 6, (int)length);
}
else if (length <= 0xFF_FF_FF_FF_FF_FF)
{
Composed = new byte[7 + length];
Composed[0] = (byte)((byte)Identifier | 0x30);
Composed[1] = (byte)((length >> 40) & 0xFF);
Composed[2] = (byte)((length >> 32) & 0xFF);
Composed[3] = (byte)((length >> 24) & 0xFF);
Composed[4] = (byte)((length >> 16) & 0xFF);
Composed[5] = (byte)((length >> 8) & 0xFF);
Composed[6] = (byte)(length & 0xFF);
Buffer.BlockCopy(data, 0, Composed, 7, (int)length);
}
else //if (len <= 0xFF_FF_FF_FF_FF_FF_FF)
{
Composed = new byte[8 + length];
Composed[0] = (byte)((byte)Identifier | 0x38);
Composed[1] = (byte)((length >> 48) & 0xFF);
Composed[2] = (byte)((length >> 40) & 0xFF);
Composed[3] = (byte)((length >> 32) & 0xFF);
Composed[4] = (byte)((length >> 24) & 0xFF);
Composed[5] = (byte)((length >> 16) & 0xFF);
Composed[6] = (byte)((length >> 8) & 0xFF);
Composed[7] = (byte)(length & 0xFF);
Buffer.BlockCopy(data, 0, Composed, 8, (int)length);
}
}
else if (Class == TDUClass.Typed)
{
if (metadata == null)
throw new Exception("Metadata must be provided for types.");
if (metadata.Length > 0xFF)
throw new Exception("Metadata can't exceed 255 bytes in length.");
var metaLen = (byte)metadata.Length;
var len = 1 + (ulong)metaLen + length;
if (length == 0)
{
Composed = new byte[1] { (byte)Identifier };
}
else if (metadata.Length > 0xFF)
{
throw new Exception("Metadata can't exceed 255 bytes in length.");
}
else if (length <= 0xFF)
{
Composed = new byte[2 + len];
Composed[0] = (byte)((byte)Identifier | 0x8);
Composed[1] = (byte)len;
Composed[2] = metaLen;
Buffer.BlockCopy(metadata, 0, Composed, 3, metaLen);
Buffer.BlockCopy(data, 0, Composed, 3 + metaLen, (int)length);
}
else if (len <= 0xFF_FF)
{
Composed = new byte[3 + len];
Composed[0] = (byte)((byte)identifier | 0x10);
Composed[1] = (byte)((len >> 8) & 0xFF);
Composed[2] = (byte)(len & 0xFF);
Composed[3] = metaLen;
Buffer.BlockCopy(metadata, 0, Composed, 4, metaLen);
Buffer.BlockCopy(data, 0, Composed, 4 + metaLen, (int)length);
}
else if (len <= 0xFF_FF_FF)
{
Composed = new byte[4 + len];
Composed[0] = (byte)((byte)identifier | 0x18);
Composed[1] = (byte)((len >> 16) & 0xFF);
Composed[2] = (byte)((len >> 8) & 0xFF);
Composed[3] = (byte)(len & 0xFF);
Composed[4] = metaLen;
Buffer.BlockCopy(metadata, 0, Composed, 5, metaLen);
Buffer.BlockCopy(data, 0, Composed, 5 + metaLen, (int)length);
}
else if (len <= 0xFF_FF_FF_FF)
{
Composed = new byte[5 + len];
Composed[0] = (byte)((byte)identifier | 0x20);
Composed[1] = (byte)((len >> 24) & 0xFF);
Composed[2] = (byte)((len >> 16) & 0xFF);
Composed[3] = (byte)((len >> 8) & 0xFF);
Composed[4] = (byte)(len & 0xFF);
Composed[5] = metaLen;
Buffer.BlockCopy(metadata, 0, Composed, 6, metaLen);
Buffer.BlockCopy(data, 0, Composed, 6 + metaLen, (int)length);
}
else if (len <= 0xFF_FF_FF_FF_FF)
{
Composed = new byte[6 + len];
Composed[0] = (byte)((byte)identifier | 0x28);
Composed[1] = (byte)((len >> 32) & 0xFF);
Composed[2] = (byte)((len >> 24) & 0xFF);
Composed[3] = (byte)((len >> 16) & 0xFF);
Composed[4] = (byte)((len >> 8) & 0xFF);
Composed[5] = (byte)(len & 0xFF);
Composed[6] = metaLen;
Buffer.BlockCopy(metadata, 0, Composed, 7, metaLen);
Buffer.BlockCopy(data, 0, Composed, 7 + metaLen, (int)length);
}
else if (len <= 0xFF_FF_FF_FF_FF_FF)
{
Composed = new byte[7 + len];
Composed[0] = (byte)((byte)identifier | 0x30);
Composed[1] = (byte)((len >> 40) & 0xFF);
Composed[2] = (byte)((len >> 32) & 0xFF);
Composed[3] = (byte)((len >> 24) & 0xFF);
Composed[4] = (byte)((len >> 16) & 0xFF);
Composed[5] = (byte)((len >> 8) & 0xFF);
Composed[6] = (byte)(len & 0xFF);
Composed[7] = metaLen;
Buffer.BlockCopy(metadata, 0, Composed, 8, metaLen);
Buffer.BlockCopy(data, 0, Composed, 8 + metaLen, (int)length);
}
else //if (len <= 0xFF_FF_FF_FF_FF_FF_FF)
{
Composed = new byte[8 + len];
Composed[0] = (byte)((byte)identifier | 0x38);
Composed[1] = (byte)((len >> 48) & 0xFF);
Composed[2] = (byte)((len >> 40) & 0xFF);
Composed[3] = (byte)((len >> 32) & 0xFF);
Composed[4] = (byte)((len >> 24) & 0xFF);
Composed[5] = (byte)((len >> 16) & 0xFF);
Composed[6] = (byte)((len >> 8) & 0xFF);
Composed[7] = (byte)(len & 0xFF);
Composed[8] = metaLen;
Buffer.BlockCopy(metadata, 0, Composed, 9, metaLen);
Buffer.BlockCopy(data, 0, Composed, 9 + metaLen, (int)length);
}
}
}
public bool MatchType(TDU with)
{
if (Identifier != with.Identifier)
return false;
if (Class == TDUClass.Typed)
if (!Metadata.SequenceEqual(with.Metadata))
return false;
return true;
}
}