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Add project files.
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‎.editorconfig

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[*.cs]
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# IDE0090: Use 'new(...)'
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dotnet_diagnostic.IDE0090.severity = none
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# IDE0066: Convert switch statement to expression
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dotnet_diagnostic.IDE0066.severity = none
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csharp_indent_labels = one_less_than_current
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csharp_using_directive_placement = outside_namespace:silent
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csharp_prefer_simple_using_statement = true:suggestion
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csharp_prefer_braces = true:silent
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csharp_style_namespace_declarations = block_scoped:silent
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csharp_style_prefer_method_group_conversion = true:silent
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csharp_style_prefer_top_level_statements = true:silent
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csharp_style_expression_bodied_methods = false:silent
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csharp_style_expression_bodied_constructors = false:silent
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csharp_style_expression_bodied_operators = false:silent
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csharp_style_expression_bodied_properties = true:silent
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csharp_style_expression_bodied_indexers = true:silent
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csharp_style_expression_bodied_accessors = true:silent
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csharp_style_expression_bodied_lambdas = true:silent
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csharp_style_expression_bodied_local_functions = false:silent
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[*.{cs,vb}]
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#### Naming styles ####
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# Naming rules
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dotnet_naming_rule.interface_should_be_begins_with_i.severity = suggestion
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dotnet_naming_rule.interface_should_be_begins_with_i.symbols = interface
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dotnet_naming_rule.interface_should_be_begins_with_i.style = begins_with_i
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dotnet_naming_rule.types_should_be_pascal_case.severity = suggestion
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dotnet_naming_rule.types_should_be_pascal_case.symbols = types
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dotnet_naming_rule.types_should_be_pascal_case.style = pascal_case
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dotnet_naming_rule.non_field_members_should_be_pascal_case.severity = suggestion
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dotnet_naming_rule.non_field_members_should_be_pascal_case.symbols = non_field_members
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dotnet_naming_rule.non_field_members_should_be_pascal_case.style = pascal_case
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# Symbol specifications
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dotnet_naming_symbols.interface.applicable_kinds = interface
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dotnet_naming_symbols.interface.applicable_accessibilities = public, internal, private, protected, protected_internal, private_protected
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dotnet_naming_symbols.interface.required_modifiers =
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dotnet_naming_symbols.types.applicable_kinds = class, struct, interface, enum
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dotnet_naming_symbols.types.applicable_accessibilities = public, internal, private, protected, protected_internal, private_protected
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dotnet_naming_symbols.types.required_modifiers =
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dotnet_naming_symbols.non_field_members.applicable_kinds = property, event, method
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dotnet_naming_symbols.non_field_members.applicable_accessibilities = public, internal, private, protected, protected_internal, private_protected
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dotnet_naming_symbols.non_field_members.required_modifiers =
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# Naming styles
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dotnet_naming_style.begins_with_i.required_prefix = I
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dotnet_naming_style.begins_with_i.required_suffix =
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dotnet_naming_style.begins_with_i.word_separator =
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dotnet_naming_style.begins_with_i.capitalization = pascal_case
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dotnet_naming_style.pascal_case.required_prefix =
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dotnet_naming_style.pascal_case.required_suffix =
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dotnet_naming_style.pascal_case.word_separator =
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dotnet_naming_style.pascal_case.capitalization = pascal_case
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dotnet_naming_style.pascal_case.required_prefix =
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dotnet_naming_style.pascal_case.required_suffix =
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dotnet_naming_style.pascal_case.word_separator =
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dotnet_naming_style.pascal_case.capitalization = pascal_case
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dotnet_style_operator_placement_when_wrapping = beginning_of_line
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tab_width = 4
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indent_size = 4
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end_of_line = crlf
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dotnet_style_coalesce_expression = true:suggestion
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dotnet_style_null_propagation = true:suggestion
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dotnet_style_prefer_is_null_check_over_reference_equality_method = true:suggestion

‎ICMPv6DotNet.sln

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio Version 17
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VisualStudioVersion = 17.5.33424.131
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ICMPv6DotNet", "ICMPv6Sharp\ICMPv6DotNet.csproj", "{DE576278-124D-4D5E-96A7-D4C0F2ACEC5B}"
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EndProject
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Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{7F141CE5-ACB3-42FD-B3BD-2F1CC449751C}"
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ProjectSection(SolutionItems) = preProject
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.editorconfig = .editorconfig
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EndProjectSection
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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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{DE576278-124D-4D5E-96A7-D4C0F2ACEC5B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{DE576278-124D-4D5E-96A7-D4C0F2ACEC5B}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{DE576278-124D-4D5E-96A7-D4C0F2ACEC5B}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{DE576278-124D-4D5E-96A7-D4C0F2ACEC5B}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {ACDB6221-943A-42FB-BE7E-A30D32FA881F}
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EndGlobalSection
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EndGlobal

‎ICMPv6Sharp/ICMPPacket.cs

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using System;
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using System.Buffers.Binary;
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using System.Collections.Generic;
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using System.Linq;
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using System.Net;
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using System.Text;
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using System.Threading.Tasks;
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using ICMPv6DotNet.Packets;
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namespace ICMPv6DotNet
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{
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public class ICMPPacket
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{
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protected Memory<byte> buffer;
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protected IPAddress source;
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protected IPAddress destination;
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protected bool valid = false;
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protected ICMPV6Payload? payload;
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public ICMPPacket(Span<byte> bytes, IPAddress source, IPAddress destination)
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{
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if (bytes.Length < 4)
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buffer = new byte[4];
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else
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buffer = bytes.ToArray();
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this.source = source;
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this.destination = destination;
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}
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public bool IsValid
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{
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get
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{
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if (buffer.Span[0] == 0)
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return false;
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if (!valid)
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{
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lock (source)
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{
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valid = Validate();
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}
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}
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return valid;
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}
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}
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private bool Validate()
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{
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uint checksum = 0;
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Span<byte> sourceBytes = source.GetAddressBytes();
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Span<byte> destBytes = destination.GetAddressBytes();
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Span<byte> lengthBytes = new byte[4];
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BinaryPrimitives.WriteUInt32BigEndian(lengthBytes, (uint)buffer.Length);
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for (var i = 0; i < 16; i += 2)
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{
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checksum += BinaryPrimitives.ReadUInt16BigEndian(sourceBytes.Slice(i));
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checksum += BinaryPrimitives.ReadUInt16BigEndian(destBytes.Slice(i));
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}
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checksum += BinaryPrimitives.ReadUInt16BigEndian(lengthBytes.Slice(0));
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checksum += BinaryPrimitives.ReadUInt16BigEndian(lengthBytes.Slice(2));
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checksum += (ushort)58;
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for (var i = 0; i < buffer.Length; i += 2)
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checksum += BinaryPrimitives.ReadUInt16BigEndian(buffer.Slice(i).Span);
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if (buffer.Length % 2 != 0)
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checksum += buffer.Span[buffer.Length - 1];
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while (checksum > 0xFFFF)
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checksum = (checksum & 0xFFFF) + (checksum >> 16);
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return ((checksum & 0xFFFF) == 0xFFFF);
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//To Calculate a checksum 0 out checksum field and then
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//checksum = (ushort)~checksum;
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}
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public IPAddress Source { get { return source; } }
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public IPAddress Destination { get { return destination; } }
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public ICMPType Type { get { return (ICMPType)buffer.Span[0]; } }
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public bool IsError { get { return buffer.Span[0] > 0 && buffer.Span[0] < 128; } }
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public bool IsInfo { get { return buffer.Span[0] > 127; } }
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public ushort Checksum { get { return BitConverter.ToUInt16(buffer.Slice(2, 2).Span); } }
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public ICMPV6Payload? Payload
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{
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get
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{
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if (!IsValid)
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return null;
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payload ??= ICMPV6Payload.Create(buffer, Type);
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return payload;
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}
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}
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public override string ToString()
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{
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if (!IsValid)
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return $"Invalid Packet [Length: {buffer.Length}]";
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if (Payload == null)
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return $"{Type} from {Source} to {Destination}";
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return $"{Type} from {Source}: {Payload}";
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}
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}
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}

‎ICMPv6Sharp/ICMPType.cs

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namespace ICMPv6DotNet
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{
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public enum ICMPType
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{
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Invalid = 0,
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DestinationUnreachable = 1,
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PacketTooBig = 2,
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TimeExceeded = 3,
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ParameterProblem = 4,
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PrivateExperimentationError = 100,
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PrivateExperimentationError2 = 101,
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EchoRequest= 128,
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EchoReply = 129,
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MLDQuery = 130,
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MLDReport = 131,
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MLDDone = 132,
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RouterSolicitation = 133,
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RouterAdvertisement = 134,
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NeighborSolicitation = 135,
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NeighborAdvertisement = 136,
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RedirectMessage = 137,
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RouterRenumbering = 138,
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NodeInformationQuery = 139,
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NodeInformationResponse = 140,
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InverseNeighborDiscoverySolicitation = 141,
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InverseNeighborDiscoveryAdvertisement = 142,
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MLDv2Report = 143,
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HomeAgentAddressDiscoveryRequest = 144,
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HomeAgentAddressDiscoveryReply = 145,
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MobilePrefixSolicitation = 146,
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MobilePrefixReply = 147,
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CertificationPathSolicitation = 148,
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CertificationPathAdvertisement = 149,
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MulticastRouterAdvertisement = 151,
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MulticastRouterSolicitation = 152,
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MulticastRouterTermination = 153,
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RPLControl = 155,
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PrivateExperimentationInfo = 200,
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PrivateExperimentationInfo2 = 201,
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}
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}

‎ICMPv6Sharp/ICMPv6DotNet.csproj

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<OutputType>Exe</OutputType>
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<TargetFramework>net6.0</TargetFramework>
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<ImplicitUsings>enable</ImplicitUsings>
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<Nullable>enable</Nullable>
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</PropertyGroup>
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<ItemGroup>
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<None Include="..\.editorconfig" Link=".editorconfig" />
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</ItemGroup>
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</Project>

‎ICMPv6Sharp/Packets/ErrorReason.cs

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namespace ICMPv6DotNet.Packets
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{
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public enum ErrorReason
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{
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NoRouteToDestination = 0x100,
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CommunicationWithDestinationAdministrativelyProhibited = 0x101,
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BeyondScopeOfSourceAddress = 0x102,
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AddressUnreachable = 0x103,
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PortUnreachable = 0x104,
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SourceAddressFailedIngressEgressPolicy = 0x105,
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RejectRouteToDestination = 0x106,
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ErrorInSourceRoutingHeader = 0x107,
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HopLimitExceededInTransit = 0x300,
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FragmentReassemblyTimeExceeded = 0x301,
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ErroneousHeaderFieldEncountered = 0x400,
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UnrecognizedNextHeaderTypeEncountered = 0x401,
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UnrecognizedIPv6OptionEncountered = 0x402
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}
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}

‎ICMPv6Sharp/Packets/ICMPBinaryPayload.cs

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using System.Text;
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namespace ICMPv6DotNet.Packets
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{
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public class ICMPBinaryPayload : ICMPV6Payload
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{
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public ICMPBinaryPayload(Memory<byte> buffer) : base(buffer) { }
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public override string ToString()
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{
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return "Payload: " + Encoding.ASCII.GetString(buffer.Slice(4).Span);
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}
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}
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}

‎ICMPv6Sharp/Packets/ICMPErrorPayload.cs

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using ICMPv6DotNet.Packets;
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using System.Buffers.Binary;
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using System.Text;
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namespace ICMPv6DotNet
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{
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public class ICMPErrorPayload : ICMPV6Payload
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{
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public ICMPErrorPayload(Memory<byte> buffer, ICMPType type) : base(buffer)
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{
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if (type == ICMPType.PacketTooBig)
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MTU = BinaryPrimitives.ReadUInt32BigEndian(buffer.Slice(4, 4).Span);
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else if (type == ICMPType.ParameterProblem)
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Pointer = BinaryPrimitives.ReadUInt32BigEndian(buffer.Slice(4, 4).Span);
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Reason = (ErrorReason)(((int)type << 8) + Code);
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}
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public override string ToString()
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{
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return $"Reason: {Reason}, MTU: {MTU}, Packet: {Encoding.ASCII.GetString(buffer.Slice(8).Span)}";
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}
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public uint? MTU { get; private set; }
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public uint? Pointer { get; private set; }
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public ErrorReason Reason { get; private set; }
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}
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}

‎ICMPv6Sharp/Packets/ICMPV6Payload.cs

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using ICMPv6DotNet.Packets.MLD;
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using ICMPv6DotNet.Packets.NDPOptions;
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namespace ICMPv6DotNet.Packets
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{
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public abstract class ICMPV6Payload
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{
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protected Memory<byte> buffer;
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internal ICMPV6Payload(Memory<byte> buffer)
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{
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this.buffer = buffer;
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}
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internal static ICMPV6Payload? Create(Memory<byte> buffer, ICMPType type)
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{
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switch (type)
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{
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case ICMPType.DestinationUnreachable:
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case ICMPType.TimeExceeded:
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case ICMPType.PacketTooBig:
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case ICMPType.ParameterProblem:
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return new ICMPErrorPayload(buffer, type);
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case ICMPType.EchoReply:
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case ICMPType.EchoRequest:
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return new ICMPBinaryPayload(buffer);
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case ICMPType.NeighborAdvertisement:
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case ICMPType.NeighborSolicitation:
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case ICMPType.RouterAdvertisement:
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case ICMPType.RouterSolicitation:
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case ICMPType.RedirectMessage:
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return new NDPPayload(buffer, type);
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case ICMPType.MLDv2Report:
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return new MLDReportPayload(buffer, type);
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default:
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return null;
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}
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}
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public byte Code { get { return buffer.Span[1]; } }
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public virtual bool IsValid { get { return true; } }
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public abstract override string ToString();
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}
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}

‎ICMPv6Sharp/Packets/MLD/MLDGroupRecordType.cs

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namespace ICMPv6DotNet.Packets.MLD
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{
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public enum MLDGroupRecordType
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{
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Invalid = 0,
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ModeIsInclude = 1,
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ModeIsExcluse = 2,
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ChangeToIncludeMode = 3,
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ChangeToExcludeMode = 4,
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AllowNewSources = 5,
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BlockOldSources = 6
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}
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}

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