72 lines
2.0 KiB
C#
72 lines
2.0 KiB
C#
using skyscraper5.Skyscraper.IO;
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using skyscraper5.Skyscraper;
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namespace skyscraper8.Ietf.FLUTE
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{
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internal class LctFrame
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{
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public LctFrame(byte[] buffer)
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{
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MemoryStream ms = new MemoryStream(buffer, false);
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byte byteA = ms.ReadUInt8();
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this.Version = (byteA & 0xf0) >> 4;
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this.CongestionControlFlag = (byteA & 0xc0) >> 2;
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this.ProtocolSpecificIndication = (byteA & 0x03);
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byte byteB = ms.ReadUInt8();
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this.TransportSessionIdentifierFlag = (byteB & 0x80) != 0;
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this.TransportObjectIdentifierFlag = (byteB & 0x60) >> 5;
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this.HalfWordFlag = (byteB & 0x10) != 0;
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int reserved = (byteB & 0x0c) >> 2;
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this.CloseSessionFlag = (byteB & 0x02) != 0;
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this.CloseObjectFlag = (byteB & 0x01) != 0;
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if (this.Version != 1)
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{
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Debug.WriteLine(String.Format("FLUTE Version {0}", Version));
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return;
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}
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int HeaderLength = ms.ReadUInt8();
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HeaderLength *= 4;
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HeaderLength -= 4;
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this.Codepoint = ms.ReadUInt8();
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byte[] headerBuffer = ms.ReadBytes(HeaderLength);
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this.LctHeader = new LctHeader(headerBuffer,CongestionControlFlag,TransportSessionIdentifierFlag,TransportObjectIdentifierFlag,HalfWordFlag);
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if (!this.LctHeader.Valid)
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return;
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if (ms.GetAvailableBytes() < 4)
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return;
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this.FecHeader = new FecHeader(ms);
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long avails = ms.GetAvailableBytes();
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if (avails == 0)
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return;
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Payload = ms.ReadBytes(ms.GetAvailableBytes());
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}
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public int Version { get; }
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public int CongestionControlFlag { get; }
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public int ProtocolSpecificIndication { get; }
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public byte Codepoint { get; }
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public LctHeader LctHeader { get; }
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public bool TransportSessionIdentifierFlag { get; }
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public int TransportObjectIdentifierFlag { get; }
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public bool HalfWordFlag { get; }
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public bool CloseSessionFlag { get; }
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public bool CloseObjectFlag { get; }
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public FecHeader FecHeader { get; }
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public byte[] Payload { get; }
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}
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}
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