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Add project
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‎GalaevNetwork3.sln

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Microsoft Visual Studio Solution File, Format Version 12.00
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "GalaevNetwork3", "GalaevNetwork3\GalaevNetwork3.csproj", "{9A5E3483-E0F3-4B7A-81EB-C2FF8E08C274}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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Release|Any CPU = Release|Any CPU
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{9A5E3483-E0F3-4B7A-81EB-C2FF8E08C274}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{9A5E3483-E0F3-4B7A-81EB-C2FF8E08C274}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{9A5E3483-E0F3-4B7A-81EB-C2FF8E08C274}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{9A5E3483-E0F3-4B7A-81EB-C2FF8E08C274}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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EndGlobal

‎GalaevNetwork3/BitArrayRoutine/BitArrayExtensions.cs

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using System.Collections;
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using System.Collections.Generic;
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using System.Text;
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namespace GalaevNetwork3.BitArrayRoutine
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{
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public static class BitArrayExtensions
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{
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// Based on https://stackoverflow.com/a/31954694
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public static ushort CRC16(this byte[] data)
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{
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ushort crc = 0;
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for (int i = 0; i < data.Length; i++)
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{
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crc ^= (ushort)(data[i] << 8);
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for (int j = 0; j < 8; j++)
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{
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if ((crc & 0x8000) != 0)
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crc = (ushort)((crc << 1) ^ 0x1021);
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else
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crc <<= 1;
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}
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}
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return crc;
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}
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public static string ToBinString(this BitArray bitArray)
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{
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StringBuilder builder = new StringBuilder(bitArray.Length);
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int pos = 1;
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for (var i = 0; i < bitArray.Count; i++, pos++)
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{
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builder.Append(bitArray[i] ? 1 : 0);
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if (pos % 8 == 0)
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{
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builder.Append(" ");
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}
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}
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return builder.ToString();
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}
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public static bool IsSameNoCopy(this BitArray srcArray, BitArray cmpArray, int srcStartIndex, int cmpStartIndex, int length)
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{
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for (var i = 0; i < length; i++)
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{
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if (srcArray[srcStartIndex + i] != cmpArray[cmpStartIndex + i])
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{
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return false;
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}
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}
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return true;
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}
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public static int FindFlag(this BitArray bitArray, int offset = 0)
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{
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int i = offset;
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while (i <= bitArray.Length - C.FlagSize)
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{
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if (bitArray.IsSameNoCopy(Frame.Flag, i, 0, C.FlagSize))
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{
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// We hit the flag
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return i;
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}
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i++;
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}
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return -1;
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}
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public static byte[] ToByteArray(this BitArray data)
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{
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byte[] array = new byte[data.Length / 8 + (data.Length % 8 > 0 ? 1 : 0)];
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data.CopyTo(array, 0);
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return array;
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}
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public static BitArray BitStaff(this BitArray data)
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{
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int ones = 0;
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int extraBits = 0;
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for (var i = 0; i < data.Count; i++)
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{
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if (data[i])
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{
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ones++;
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}
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if (ones == 5)
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{
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extraBits++;
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ones = 0;
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}
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}
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ones = 0;
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if (extraBits > 0)
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{
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BitArray result = new BitArray(data.Length + extraBits);
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int position = 0;
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for (var i = 0; i < data.Length; i++)
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{
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if (data[i])
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{
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ones++;
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}
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else
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{
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ones = 0;
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}
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if (ones == 5)
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{
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result[position++] = false;
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ones = 0;
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}
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result[position++] = data[i];
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}
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return result;
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}
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return data;
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}
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public static BitArray DeBitStaff(this BitArray data)
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{
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int ones = 0;
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int extraBits = 0;
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for (var i = 0; i < data.Count; i++)
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{
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if (data[i])
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{
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ones++;
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}
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else
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{
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ones = 0;
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}
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if (ones == 5)
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{
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extraBits++;
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ones = 0;
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}
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}
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ones = 0;
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if (extraBits > 0)
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{
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BitArray result = new BitArray(data.Length - extraBits);
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int position = 0;
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for (var i = 0; i < data.Length; i++)
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{
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if (data[i])
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{
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ones++;
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}
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if (ones == 5)
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{
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position++;
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ones = 0;
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}
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result[position++] = data[i];
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}
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return result;
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}
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return data;
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}
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public static List<BitArray> Split(this BitArray array, int maxSize)
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{
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List<BitArray> parts = new();
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BitArrayReader reader = new BitArrayReader(array);
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while (reader.Position + maxSize <= array.Length)
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{
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parts.Add(reader.Read(maxSize));
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}
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if (reader.Position < array.Length)
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{
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parts.Add(reader.Read(array.Length - reader.Position));
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}
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return parts;
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}
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}
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}

‎GalaevNetwork3/BitArrayRoutine/BitArrayReader.cs

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using System;
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using System.Collections;
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namespace GalaevNetwork3.BitArrayRoutine
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{
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public class BitArrayReader
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{
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public BitArray Array { get; }
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public int Position { get; private set; }
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public BitArrayReader(BitArray array, int position = 0)
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{
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Array = array;
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Position = position;
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}
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public void Adjust(int shift)
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{
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Position += shift;
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}
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public BitArray Read(int size)
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{
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if (Position + size > Array.Length)
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{
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throw new ArgumentException($"Attempt to read {size}, when only {Array.Length - Position} available");
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}
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BitArray result = new BitArray(size);
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for (int i = 0; i < size; i++)
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{
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result[i] = Array[Position++];
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}
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return result;
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}
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}
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}

‎GalaevNetwork3/BitArrayRoutine/BitArrayWriter.cs

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using System.Collections;
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namespace GalaevNetwork3.BitArrayRoutine
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{
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public class BitArrayWriter
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{
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public BitArray Array { get; }
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public int Position { get; private set; }
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public BitArrayWriter(BitArray array, int position = 0)
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{
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Array = array;
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Position = position;
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}
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public void Write(BitArray data)
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{
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for (var i = 0; i < data.Length; i++)
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{
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Array[Position++] = data[i];
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}
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}
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}
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}

‎GalaevNetwork3/C.cs

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namespace GalaevNetwork3
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{
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public static class C
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{
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public const int ChecksumSize = 16;
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public const int FlagSize = 8;
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public const int ControlSize = 16;
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public const int ReceiverBufferSize = 5; // N
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public const int MaxFrameDataSize = 255;
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}
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}

‎GalaevNetwork3/ConsoleHelper.cs

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using System;
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using System.Collections;
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namespace GalaevNetwork3
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{
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public static class ConsoleHelper
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{
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public static object LockObject = new Object();
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public static void WriteToConsole(string info, string write)
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{
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lock (LockObject)
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{
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Console.WriteLine(info + " : " + write);
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}
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}
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public static void WriteToConsoleArray(string info, BitArray array)
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{
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lock (LockObject)
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{
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Console.Write(info + " : ");
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for (int i = 0; i < array.Length; i++)
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{
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if (array[i] == true)
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Console.Write("1");
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else
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Console.Write("0");
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}
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Console.WriteLine();
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}
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}
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}
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}

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