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Implementing basic DNS Client

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This commit is contained in:
Fabian Stamm 2016-11-23 22:32:40 +01:00
parent ddf1c09acb
commit 1af64ace95
50 changed files with 5234 additions and 39 deletions
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9
SMTPServer/DNSResolver/DNSResolver.csproj
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@ -1,16 +1,16 @@
<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003"> <Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" /> <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" />
<PropertyGroup Label="Configuration">
<NoWarn>1701;1702;1705;1006</NoWarn>
</PropertyGroup>
<PropertyGroup> <PropertyGroup>
<OutputType>Exe</OutputType> <OutputType>Exe</OutputType>
<TargetFramework>netcoreapp1.0</TargetFramework> <TargetFramework>netcoreapp1.0</TargetFramework>
</PropertyGroup> </PropertyGroup>
<ItemGroup> <ItemGroup>
<Compile Include="**\*.cs" /> <Compile Include="**\*.cs" />
<EmbeddedResource Include="**\*.resx" /> <EmbeddedResource Include="**\*.resx" />
</ItemGroup> </ItemGroup>
<ItemGroup> <ItemGroup>
<PackageReference Include="Microsoft.NETCore.App"> <PackageReference Include="Microsoft.NETCore.App">
<Version>1.0.1</Version> <Version>1.0.1</Version>
@ -20,6 +20,5 @@
<PrivateAssets>All</PrivateAssets> <PrivateAssets>All</PrivateAssets>
</PackageReference> </PackageReference>
</ItemGroup> </ItemGroup>
<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" /> <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
</Project> </Project>

115
SMTPServer/DNSResolver/DnsHelper.cs Normal file
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@ -0,0 +1,115 @@
using System;
using System.Text;
namespace DNSResolver
{
internal static class DnsHelpers
{
private const long Epoch = 621355968000000000;
internal static byte[] CanonicaliseDnsName(string name, bool lowerCase)
{
if (!name.EndsWith("."))
{
name += ".";
}
if (name == ".")
{
return new byte[1];
}
StringBuilder sb = new StringBuilder();
sb.Append('\0');
for (int i = 0, j = 0; i < name.Length; i++, j++)
{
if (lowerCase)
{
sb.Append(char.ToLower(name[i]));
}
else
{
sb.Append(name[i]);
}
if (name[i] == '.')
{
sb[i - j] = (char)(j & 0xff);
j = -1;
}
}
sb[sb.Length - 1] = '\0';
return Encoding.ASCII.GetBytes(sb.ToString());
}
internal static String DumpArrayToString(byte[] bytes)
{
StringBuilder builder = new StringBuilder();
builder.Append("[");
foreach (byte b in bytes)
{
builder.Append(" ");
builder.Append((sbyte)b);
builder.Append(" ");
}
builder.Append("]");
return builder.ToString();
}
/// <summary>
/// Converts a instance of a <see cref="DateTime"/> class to a 48 bit format time since epoch.
/// Epoch is defined as 1-Jan-70 UTC.
/// </summary>
/// <param name="dateTimeToConvert">The <see cref="DateTime"/> instance to convert to DNS format.</param>
/// <param name="timeHigh">The upper 16 bits of time.</param>
/// <param name="timeLow">The lower 32 bits of the time object.</param>
internal static void ConvertToDnsTime(DateTime dateTimeToConvert, out int timeHigh, out long timeLow)
{
long secondsFromEpoch = (dateTimeToConvert.ToUniversalTime().Ticks - Epoch) / 10000000;
timeHigh = (int)(secondsFromEpoch >> 32);
timeLow = (secondsFromEpoch & 0xFFFFFFFFL);
Logging.AddLogMessage(LoggingType.TRACE, "test");
Trace.WriteLine(String.Format("Date: {0}", dateTimeToConvert));
Trace.WriteLine(String.Format("secondsFromEpoch: {0}", secondsFromEpoch));
Trace.WriteLine(String.Format("timeHigh: {0}", timeHigh));
Trace.WriteLine(String.Format("timeLow: {0}", timeLow));
}
/// <summary>
/// Convert from DNS 48 but time format to a <see cref="DateTime"/> instance.
/// </summary>
/// <param name="timeHigh">The upper 16 bits of time.</param>
/// <param name="timeLow">The lower 32 bits of the time object.</param>
/// <returns>The converted date time</returns>
internal static DateTime ConvertFromDnsTime(long timeLow, long timeHigh)
{
long time = (timeHigh << 32) + timeLow;
time = time * 10000000;
time += Epoch;
return new DateTime(time);
}
/// <summary>
/// Convert from DNS 48 but time format to a <see cref="DateTime"/> instance.
/// </summary>
/// <param name="dnsTime">The upper 48 bits of time.</param>
/// <returns>The converted date time</returns>
internal static DateTime ConvertFromDnsTime(long dnsTime)
{
dnsTime = dnsTime * 10000000;
dnsTime += Epoch;
return new DateTime(dnsTime);
}
}
}

9
SMTPServer/DNSResolver/Program.cs
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@ -1,9 +0,0 @@
using System;
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Hello World!");
}
}

50
SMTPServer/Logging/Logging.cs Normal file
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@ -0,0 +1,50 @@
using System;
namespace Logging
{
public class Logging
{
private static LoggingType[] _ActiveLoggingTypes { get; set; }
public enum LoggingType
{
TRACE,
ERROR,
DEBUG,
WARNING,
INFO,
ALL
}
private static void AddLogMessage(LoggingType messagetype, string message)
{
if(CheckLoggingType(messagetype)) PrintToConsole(messagetype, message);
}
private static bool CheckLoggingType(LoggingType lt){
if (_ActiveLoggingTypes.Length < 1) {
_ActiveLoggingTypes = new LoggingType[1];
_ActiveLoggingTypes[0] = LoggingType.ALL;
}
bool found = false;
foreach(LoggingType l in _ActiveLoggingTypes)
{
if (l == lt || l == LoggingType.ALL)
{
found = true;
break;
}
}
return found;
}
private static void PrintToConsole(LoggingType lt, string message)
{
Console.WriteLine("[" + lt.ToString() + "]" + message);
}
}
}

23
SMTPServer/Logging/Logging.csproj Normal file
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@ -0,0 +1,23 @@
<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" />
<PropertyGroup Label="Configuration">
<NoWarn>1701;1702;1705;1006</NoWarn>
</PropertyGroup>
<PropertyGroup>
<TargetFramework>netstandard1.4</TargetFramework>
</PropertyGroup>
<ItemGroup>
<Compile Include="**\*.cs" />
<EmbeddedResource Include="**\*.resx" />
</ItemGroup>
<ItemGroup>
<PackageReference Include="NETStandard.Library">
<Version>1.6</Version>
</PackageReference>
<PackageReference Include="Microsoft.NET.Sdk">
<Version>1.0.0-alpha-20161104-2</Version>
<PrivateAssets>All</PrivateAssets>
</PackageReference>
</ItemGroup>
<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
</Project>

9
SMTPServer/SMTPServer.sln
View File

@ -4,14 +4,9 @@ Microsoft Visual Studio Solution File, Format Version 12.00
VisualStudioVersion = 15.0.25914.0 VisualStudioVersion = 15.0.25914.0
MinimumVisualStudioVersion = 10.0.40219.1 MinimumVisualStudioVersion = 10.0.40219.1
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SMTPServer", "SMTPServer\SMTPServer.csproj", "{ABB6A3E6-38B6-4D02-AC9C-91FA69CF03BE}" Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SMTPServer", "SMTPServer\SMTPServer.csproj", "{ABB6A3E6-38B6-4D02-AC9C-91FA69CF03BE}"
ProjectSection(ProjectDependencies) = postProject
{55342A63-351F-4908-B708-DC4111FF34E7} = {55342A63-351F-4908-B708-DC4111FF34E7}
EndProjectSection
EndProject EndProject
Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{D43013F8-933F-4ADC-8943-08E91662A070}" Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{D43013F8-933F-4ADC-8943-08E91662A070}"
EndProject EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DNSResolver", "DNSResolver\DNSResolver.csproj", "{55342A63-351F-4908-B708-DC4111FF34E7}"
EndProject
Global Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Any CPU = Debug|Any CPU Debug|Any CPU = Debug|Any CPU
@ -22,10 +17,6 @@ Global
{ABB6A3E6-38B6-4D02-AC9C-91FA69CF03BE}.Debug|Any CPU.Build.0 = Debug|Any CPU {ABB6A3E6-38B6-4D02-AC9C-91FA69CF03BE}.Debug|Any CPU.Build.0 = Debug|Any CPU
{ABB6A3E6-38B6-4D02-AC9C-91FA69CF03BE}.Release|Any CPU.ActiveCfg = Release|Any CPU {ABB6A3E6-38B6-4D02-AC9C-91FA69CF03BE}.Release|Any CPU.ActiveCfg = Release|Any CPU
{ABB6A3E6-38B6-4D02-AC9C-91FA69CF03BE}.Release|Any CPU.Build.0 = Release|Any CPU {ABB6A3E6-38B6-4D02-AC9C-91FA69CF03BE}.Release|Any CPU.Build.0 = Release|Any CPU
{55342A63-351F-4908-B708-DC4111FF34E7}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{55342A63-351F-4908-B708-DC4111FF34E7}.Debug|Any CPU.Build.0 = Debug|Any CPU
{55342A63-351F-4908-B708-DC4111FF34E7}.Release|Any CPU.ActiveCfg = Release|Any CPU
{55342A63-351F-4908-B708-DC4111FF34E7}.Release|Any CPU.Build.0 = Release|Any CPU
EndGlobalSection EndGlobalSection
GlobalSection(SolutionProperties) = preSolution GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE HideSolutionNode = FALSE

115
SMTPServer/SMTPServer/DNSClient/DnsHelpers.cs Normal file
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@ -0,0 +1,115 @@
using System;
using System.Diagnostics;
using System.Text;
namespace DnDns
{
internal static class DnsHelpers
{
private const long Epoch = 621355968000000000;
internal static byte[] CanonicaliseDnsName(string name, bool lowerCase)
{
if (!name.EndsWith("."))
{
name += ".";
}
if (name == ".")
{
return new byte[1];
}
StringBuilder sb = new StringBuilder();
sb.Append('\0');
for (int i = 0, j = 0; i < name.Length; i++, j++)
{
if (lowerCase)
{
sb.Append(char.ToLower(name[i]));
}
else
{
sb.Append(name[i]);
}
if (name[i] == '.')
{
sb[i - j] = (char) (j & 0xff);
j = -1;
}
}
sb[sb.Length - 1] = '\0';
return Encoding.ASCII.GetBytes(sb.ToString());
}
internal static String DumpArrayToString(byte[] bytes)
{
StringBuilder builder = new StringBuilder();
builder.Append("[");
foreach (byte b in bytes)
{
builder.Append(" ");
builder.Append((sbyte)b);
builder.Append(" ");
}
builder.Append("]");
return builder.ToString();
}
/// <summary>
/// Converts a instance of a <see cref="DateTime"/> class to a 48 bit format time since epoch.
/// Epoch is defined as 1-Jan-70 UTC.
/// </summary>
/// <param name="dateTimeToConvert">The <see cref="DateTime"/> instance to convert to DNS format.</param>
/// <param name="timeHigh">The upper 16 bits of time.</param>
/// <param name="timeLow">The lower 32 bits of the time object.</param>
internal static void ConvertToDnsTime(DateTime dateTimeToConvert, out int timeHigh, out long timeLow)
{
long secondsFromEpoch = (dateTimeToConvert.ToUniversalTime().Ticks - Epoch) / 10000000;
timeHigh = (int)(secondsFromEpoch >> 32);
timeLow = (secondsFromEpoch & 0xFFFFFFFFL);
Console.WriteLine(String.Format("Date: {0}", dateTimeToConvert));
Console.WriteLine(String.Format("secondsFromEpoch: {0}", secondsFromEpoch));
Console.WriteLine(String.Format("timeHigh: {0}", timeHigh));
Console.WriteLine(String.Format("timeLow: {0}", timeLow));
}
/// <summary>
/// Convert from DNS 48 but time format to a <see cref="DateTime"/> instance.
/// </summary>
/// <param name="timeHigh">The upper 16 bits of time.</param>
/// <param name="timeLow">The lower 32 bits of the time object.</param>
/// <returns>The converted date time</returns>
internal static DateTime ConvertFromDnsTime(long timeLow, long timeHigh)
{
long time = (timeHigh << 32) + timeLow;
time = time*10000000;
time += Epoch;
return new DateTime(time);
}
/// <summary>
/// Convert from DNS 48 but time format to a <see cref="DateTime"/> instance.
/// </summary>
/// <param name="dnsTime">The upper 48 bits of time.</param>
/// <returns>The converted date time</returns>
internal static DateTime ConvertFromDnsTime(long dnsTime)
{
dnsTime = dnsTime * 10000000;
dnsTime += Epoch;
return new DateTime(dnsTime);
}
}
}

94
SMTPServer/SMTPServer/DNSClient/Enums/NsClass.cs Normal file
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@ -0,0 +1,94 @@
/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
namespace DnDns.Enums
{
/// <summary>
/// RFC 1035:
///
/// 3.2.4. CLASS values
///
/// CLASS fields appear in resource records. The following CLASS mnemonics
/// and values are defined:
///
/// IN 1 the Internet
///
/// CS 2 the CSNET class (Obsolete - used only for examples in
/// some obsolete RFCs)
///
/// CH 3 the CHAOS class
///
/// HS 4 Hesiod [Dyer 87]
///
/// 3.2.5. QCLASS values
///
/// QCLASS fields appear in the question section of a query. QCLASS values
/// are a superset of CLASS values; every CLASS is a valid QCLASS. In
/// addition to CLASS values, the following QCLASSes are defined:
///
/// * 255 any class
/// </summary>
public enum NsClass : byte
{
/// <summary>
/// Cookie?? - NOT IMPLEMENTED
/// </summary>
INVALID = 0,
/// <summary>
/// // Internet (inet), RFC 1035
/// </summary>
INET = 1,
/// <summary>
/// MIT Chaos-net, RFC 1035 - NOT IMPLEMENTED
/// </summary>
CHAOS = 3,
/// <summary>
/// MIT Hesiod, RFC 1035 - NOT IMPLEMENTED
/// </summary>
HS = 4,
/// <summary>
/// RFC 2136 - None
/// prereq sections in update requests -- NOT IMPLEMENTED
/// </summary>
NONE = 254,
/// <summary>
/// Any QCLASS only, Wildcard match, RFC 1035 - IMPLEMENTED for INET only
/// </summary>
ANY = 255
}
}

298
SMTPServer/SMTPServer/DNSClient/Enums/NsFlags.cs Normal file
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@ -0,0 +1,298 @@
/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
namespace DnDns.Enums
{
// DNS HEADER: http://www.faqs.org/rfcs/rfc1035.html
// 1 1 1 1 1 1
// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
// | Query Identifier |
// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
// |QR| Opcode |AA|TC|RD|RA| Z|AD|CD| RCODE | <-- The Enums below are combined to create this 16 bit (2 byte) field
// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
// | QDCOUNT |
// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
// | ANCOUNT |
// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
// | NSCOUNT |
// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
// | ARCOUNT |
// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
/// <summary>
/// FlagMasks are used as a bitmask to isolate bits 16 through 31 of the DNS header to convert
/// them to their appropriate Enum types
/// </summary>
internal enum FlagMasks : ushort
{
QueryResponseMask = 0x8000,
OpCodeMask = 0x7800,
NsFlagMask = 0x07F0,
RCodeMask = 0x000F
}
/// <summary>
/// |QR| - Starts at bit 16 of DNS Header, size: 1 bit
///
/// RFC 1035:
/// A one bit field that specifies whether this message is a
/// query (0), or a response (1).
///
/// </summary>
[Flags()]
public enum QueryResponse : ushort
{
/// <summary>
/// // QR Query or Response [RFC1035] ( 0 = Query )
/// </summary>
Query = 0x0,
/// <summary>
/// // QR Query or Response [RFC1035] ( 1 = Response )
/// </summary>
Response = 0x8000
}
/// <summary>
/// | OpCode | - 4 bits of Dns header, Bit 17 - 20, see RFC 1035
///
/// RFC 1035:
///
/// A four bit field that specifies kind of query in this
/// message. This value is set by the originator of a query
/// and copied into the response.
///
/// The values are:
///
/// 0 a standard query (QUERY)
///
/// 1 an inverse query (IQUERY)
///
/// 2 a server status request (STATUS)
///
/// 3-15 reserved for future
/// </summary>
[Flags()]
public enum OpCode : ushort
{
/// <summary>
/// Standard query
/// [RFC1035] (QUERY)
/// </summary>
QUERY = 0x0000,
/// <summary>
/// Inverse query
/// [RFC1035] (IQUERY)
/// </summary>
IQUERY = 0x0800,
/// <summary>
/// Server status request
/// [RFC1035] (STATUS)
/// </summary>
STATUS = 0x1000,
}
/// <summary>
/// |AA|TC|RD|RA| Z|AD|CD| - 8 bits (1 byte) flag fields
///
/// reference: http://www.networksorcery.com/enp/protocol/dns.htm
/// </summary>
[Flags()]
public enum NsFlags : ushort
{
/// <summary>
/// AA - Authorative Answer [RFC1035] ( 0 = Not authoritative, 1 = Is authoritative )
/// Authoritative Answer - this bit is valid in responses,
/// and specifies that the responding name server is an
/// authority for the domain name in question section.
///
/// Note that the contents of the answer section may have
/// multiple owner names because of aliases. The AA bit
/// corresponds to the name which matches the query name, or
/// the first owner name in the answer section.
/// </summary>
AA = 0x0400,
/// <summary>
/// TC - Truncated Response [RFC1035] ( 0 = Not truncated, 1 = Message truncated )
///
/// TrunCation - specifies that this message was truncated
/// due to length greater than that permitted on the
/// transmission channel.
/// </summary>
TC = 0x0200,
/// <summary>
/// RD - Recursion Desired [RFC1035] ( 0 = Recursion not desired, 1 = Recursion desired )
///
/// Recursion Desired - this bit may be set in a query and
/// is copied into the response. If RD is set, it directs
/// the name server to pursue the query recursively.
/// Recursive query support is optional.
/// </summary>
RD = 0x0100,
/// <summary>
/// RA - Recursion Allowed [RFC1035] ( 0 = Recursive query support not available, 1 = Recursive query support available )
///
/// Recursion Available - this be is set or cleared in a
/// response, and denotes whether recursive query support is
/// available in the name server.
/// </summary>
RA = 0x0080,
/// <summary>
/// AD - Authentic Data [RFC4035] ( Authenticated data. 1 bit ) [NOT IMPLEMENTED]
///
/// Indicates in a response that all data included in the answer and authority
/// sections of the response have been authenticated by the server according to
/// the policies of that server. It should be set only if all data in the response
/// has been cryptographically verified or otherwise meets the server's local security
/// policy.
/// </summary>
AD = 0x0020,
/// <summary>
/// CD - Checking Disabled [RFC4035] ( Checking Disabled. 1 bit ) [NOT IMPLEMENTED]
/// </summary>
CD = 0x0010
}
/// <summary>
/// | RCODE | - 4 bits error codes
///
/// Response code - this 4 bit field is set as part of
/// responses. The values have the following interpretation:
///
/// Fields 6-15 Reserved for future use.
///
/// reference: http://www.networksorcery.com/enp/protocol/dns.htm
/// </summary>
[Flags()]
public enum RCode : ushort
{
/// <summary>
/// No error condition
/// </summary>
NoError = 0,
/// <summary>
/// Format error - The name server was unable to
/// interpret the query.
/// </summary>
FormatError = 1,
/// <summary>
/// Server failure - The name server was unable to process
/// this query due to a problem with the name server.
/// </summary>
ServerFailure = 2,
/// <summary>
/// Name Error - Meaningful only for responses from an
/// authoritative name server, this code signifies that
/// the domain name referenced in the query does not
/// exist.
/// </summary>
NameError = 3,
/// <summary>
/// Not Implemented - The name server does not support
/// the requested kind of query.
/// </summary>
NotImplemented = 4,
/// <summary>
/// Refused - The name server refuses to perform the
/// specified operation for policy reasons. For example,
/// a name server may not wish to provide the information
/// to the particular requester, or a name server may not
/// wish to perform a particular operation (e.g., zone
/// transfer) for particular data.
/// </summary>
Refused = 5,
/// <summary>
/// RFC 2136
/// Name Exists when it should not.
/// </summary>
YXDomain = 6,
/// <summary>
/// RFC 2136
/// RR Set Exists when it should not.
/// </summary>
YXRRSet = 7,
/// <summary>
/// RFC 2136
/// RR Set that should exist does not.
/// </summary>
NXRRSet = 8,
/// <summary>
/// RFC 2136
/// Server Not Authoritative for zone.
/// </summary>
NotAuth = 9,
/// <summary>
/// RFC 2136
/// Name not contained in zone.
/// </summary>
NotZone = 10,
/// <summary>
/// RFC 2671
/// RFC 2845
///
/// BADVERS Bad OPT Version.
/// BADSIG TSIG Signature Failure.
/// </summary>
BADVERS_BADSIG = 16,
/// <summary>
/// RFC 2845
/// Key not recognized.
/// </summary>
BADKEY = 17,
/// <summary>
/// RFC 2845
/// Signature out of time window.
/// </summary>
BADTIME = 18,
/// <summary>
/// RFC 2930
/// Bad TKEY Mode.
/// </summary>
BADMODE = 19,
/// <summary>
/// RFC 2930
/// Duplicate key name.
/// </summary>
BADNAME = 20,
/// <summary>
/// RFC 2930
/// Algorithm not supported.
/// </summary>
BADALG = 21
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
namespace DnDns.Enums
{
/// <summary>
/// Currently defined type values for resources and queries.
///
/// RFC 1034
///
/// 3.2.2. TYPE values
///
/// TYPE fields are used in resource records. Note that these types are a
/// subset of QTYPEs.
///
/// TYPE value and meaning
///
/// A 1 a host address, Implemented
///
/// NS 2 an authoritative name server, Implemented
///
/// MD 3 a mail destination (Obsolete - use MX), NOT Implemented
///
/// MF 4 a mail forwarder (Obsolete - use MX), NOT Implemented
///
/// CNAME 5 the canonical name for an alias, Implemented
///
/// SOA 6 marks the start of a zone of authority, Implemented
///
/// MB 7 a mailbox domain name (EXPERIMENTAL), Implemented
///
/// MG 8 a mail group member (EXPERIMENTAL), Implemented
///
/// MR 9 a mail rename domain name (EXPERIMENTAL), Implemented
///
/// NULL 10 a null RR (EXPERIMENTAL), NOT IMPLEMENTED
///
/// WKS 11 a well known service description
///
/// PTR 12 a domain name pointer
///
/// HINFO 13 host information
///
/// MINFO 14 mailbox or mail list information
///
/// MX 15 mail exchange
///
/// TXT 16 text strings
///
/// 3.2.3. QTYPE values
///
/// QTYPE fields appear in the question part of a query. QTYPES are a
/// superset of TYPEs, hence all TYPEs are valid QTYPEs. In addition, the
/// following QTYPEs are defined:
///
/// AXFR 252 A request for a transfer of an entire zone
///
/// MAILB 253 A request for mailbox-related records (MB, MG or MR)
///
/// MAILA 254 A request for mail agent RRs (Obsolete - see MX)
///
/// * 255 A request for all records
///
/// </summary>
public enum NsType : uint
{
/// <summary>
/// Invalid
/// </summary>
INVALID = 0,
/// <summary>
/// Host address
/// </summary>
A = 1,
/// <summary>
/// Authoritative server
/// </summary>
NS = 2,
/// <summary>
/// Mail destination - NOT IMPLEMENTED
/// </summary>
MD = 3,
/// <summary>
/// Mail forwarder, NOT IMPLEMENTED
/// </summary>
MF = 4,
/// <summary>
/// Canonical name
/// </summary>
CNAME = 5,
/// <summary>
/// Start of authority zone
/// </summary>
SOA = 6,
// Mailbox domain name
MB = 7,
/// <summary>
/// Mail group member
/// </summary>
MG = 8,
/// <summary>
/// Mail rename name
/// </summary>
MR = 9,
/// <summary>
/// Null resource record
/// </summary>
NULL = 10,
/// <summary>
/// Well known service
/// </summary>
WKS = 11,
/// <summary>
/// Domain name pointer
/// </summary>
PTR = 12,
/// <summary>
/// Host information
/// </summary>
HINFO = 13,
/// <summary>
/// Mailbox information
/// </summary>
MINFO = 14,
/// <summary>
/// Mail routing information
/// </summary>
MX = 15,
/// <summary>
/// Text strings, RFC 1464
/// </summary>
TXT = 16,
/// <summary>
/// Responsible person, RFC 1183, Implemented
/// </summary>
RP = 17,
/// <summary>
/// AFS cell database, RFC 1183, Implemented
/// </summary>
AFSDB = 18,
/// <summary>
/// X_25 calling address, RFC 1183, Implemented
/// </summary>
X25 = 19,
/// <summary>
/// ISDN calling address, RFC 1183, Implemented
/// </summary>
ISDN = 20,
/// <summary>
/// Router, RFC 1183, Implemented
/// </summary>
RT = 21,
/// <summary>
/// NSAP address, RFC 1706
/// </summary>
NSAP = 22,
/// <summary>
/// Reverse NSAP lookup - deprecated by PTR ?
/// </summary>
NSAP_PTR = 23,
/// <summary>
/// Security signature, RFC 2535
/// </summary>
SIG = 24,
/// <summary>
/// Security key, RFC 2535
/// </summary>
KEY = 25,
/// <summary>
/// X.400 mail mapping, RFC ?
/// </summary>
PX = 26,
/// <summary>
/// Geographical position - withdrawn, RFC 1712
/// </summary>
GPOS = 27,
/// <summary>
/// Ip6 Address, RFC 1886 -- Implemented
/// </summary>
AAAA = 28,
/// <summary>
/// Location Information, RFC 1876, Implemented
/// </summary>
LOC = 29,
/// <summary>
/// Next domain (security), RFC 2065
/// </summary>
NXT = 30,
/// <summary>
/// Endpoint identifier,RFC ?
/// </summary>
EID = 31,
/// <summary>
/// Nimrod Locator, RFC ?
/// </summary>
NIMLOC = 32,
/// <summary>
/// Server Record, RFC 2052, Implemented
/// </summary>
SRV = 33,
/// <summary>
/// ATM Address, RFC ?, Implemented
/// </summary>
ATMA = 34,
/// <summary>
/// Naming Authority PoinTeR, RFC 2915
/// </summary>
MAPTR = 35,
/// <summary>
/// Key Exchange, RFC 2230
/// </summary>
KX = 36,
/// <summary>
/// Certification record, RFC 2538
/// </summary>
CERT = 37,
/// <summary>
/// IPv6 address (deprecates AAAA), RFC 3226
/// </summary>
A6 = 38,
/// <summary>
/// Non-terminal DNAME (for IPv6), RFC 2874
/// </summary>
DNAME = 39,
/// <summary>
/// Kitchen sink (experimentatl), RFC ?
/// </summary>
SINK = 40,
/// <summary>
/// EDNS0 option (meta-RR), RFC 2671
/// </summary>
OPT = 41,
/// <summary>
/// Transaction key, RFC 2930
/// </summary>
TKEY = 249,
/// <summary>
/// Transaction signature, RFC 2845
/// </summary>
TSIG = 250,
/// <summary>
/// Incremental zone transfer, RFC 1995
/// </summary>
IXFR = 251,
/// <summary>
/// Transfer zone of authority, RFC 1035
/// </summary>
AXFR = 252,
/// <summary>
/// Transfer mailbox records, RFC 1035
/// </summary>
MAILB = 253,
/// <summary>
/// Transfer mail agent records, RFC 1035
/// </summary>
MAILA = 254,
/// <summary>
/// All of the above, RFC 1035
/// </summary>
ANY = 255,
/// <summary>
/// DNSSEC Trust Authorities
/// </summary>
DNSSECTrustAuthorities = 32768,
/// <summary>
/// DNSSEC Lookaside Validation, RFC4431
/// </summary>
DNSSECLookasideValidation = 32769
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
namespace DnDns.Enums
{
/// <summary>
/// Defines Well Known TCP Ports for Services
/// </summary>
public enum TcpServices : short
{
/// <summary>
/// Domain Name Server Port
/// </summary>
Domain = 53
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
namespace DnDns.Enums
{
/// <summary>
/// Defines Well Known UDP Ports for Services
/// </summary>
public enum UdpServices : short
{
/// <summary>
/// Domain Name Server Protocol Port
/// </summary>
Domain = 53
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using DnDns.Enums;
using DnDns.Records;
namespace DnDns.Query
{
/// <summary>
/// DnsQueryBase maintains the common state of DNS Queries (both responses and requests)
/// </summary>
public abstract class DnsQueryBase
{
#region Fields
// RFC 1034
//
// 4.1.1. Header section format
//
// 1 1 1 1 1 1
// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
// | ID |
// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
// |QR| Opcode |AA|TC|RD|RA| Z | RCODE |
// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
// | QDCOUNT |
// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
// | ANCOUNT |
// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
// | NSCOUNT |
// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
// | ARCOUNT |
// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
/// <summary>
/// ID - A 16 bit identifier. This identifier is copied
/// the corresponding reply and can be used by the requester
/// to match up replies to outstanding queries.
/// </summary>
protected ushort _transactionId;
/// <summary>
/// _flags will store a combination of the enums that make up the 16 bits after the
/// TransactionID in the DNS protocol header
/// </summary>
protected ushort _flags;
/// <summary>
/// A one bit field that specifies whether this message is a
/// query (0), or a response (1).
/// </summary>
protected QueryResponse _queryResponse;
/// <summary>
/// OPCODE - A four bit field that specifies kind of query in this
/// message. This value is set by the originator of a query
/// and copied into the response.
/// </summary>
protected OpCode _opCode;
/// <summary>
/// - A combination of flag fields in the DNS header (|AA|TC|RD|RA|)
/// </summary>
protected NsFlags _nsFlags;
/// <summary>
/// Response code - this 4 bit field is set as part of
/// responses only.
/// </summary>
protected RCode _rCode;
/// <summary>
/// QDCOUNT - an unsigned 16 bit integer specifying the number of
/// entries in the question section.
/// </summary>
protected ushort _questions;
/// <summary>
/// ANCOUNT - an unsigned 16 bit integer specifying the number of
/// resource records in the answer section.
/// </summary>
protected ushort _answerRRs;
/// <summary>
/// NSCOUNT - an unsigned 16 bit integer specifying the number of name
/// server resource records in the authority records
/// section.
/// </summary>
protected ushort _authorityRRs;
// RFC 1034
// 4.1.2. Question section format
// 1 1 1 1 1 1
// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
// | |
// / QNAME /
// / /
// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
// | QTYPE |
// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
// | QCLASS |
// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
/// <summary>
/// QNAME - a domain name represented as a sequence of labels, where
/// each label consists of a length octet followed by that
/// number of octets. The domain name terminates with the
/// zero length octet for the null label of the root. Note
/// that this field may be an odd number of octets; no
/// padding is used
/// </summary>
protected string _name;
/// <summary>
/// QTYPE - a two octet code which specifies the type of the query.
/// The values for this field include all codes valid for a
/// TYPE field, together with some more general codes which
/// can match more than one type of RR.
/// </summary>
protected NsType _nsType;
/// <summary>
/// QCLASS - a two octet code that specifies the class of the query.
/// For example, the QCLASS field is IN for the Internet.
/// </summary>
protected NsClass _nsClass;
/// <summary>
/// The additional records for the DNS Query
/// </summary>
protected List<IDnsRecord> _additionalRecords = new List<IDnsRecord>();
#endregion Fields
#region Properties
/// ID - A 16 bit identifier. This identifier is copied
/// the corresponding reply and can be used by the requester
/// to match up replies to outstanding queries.
/// </summary>
public ushort TransactionID
{
get { return _transactionId; }
}
/// <summary>
/// A one bit field that specifies whether this message is a
/// query (0), or a response (1).
/// </summary>
public QueryResponse QueryResponse
{
get { return _queryResponse; }
}
/// <summary>
/// OPCODE - A four bit field that specifies kind of query in this
/// message. This value is set by the originator of a query
/// and copied into the response.
/// </summary>
public OpCode OpCode
{
get { return _opCode; }
}
/// <summary>
/// NsFlags - A combination of flag fields in the DNS header (|AA|TC|RD|RA|)
/// </summary>
public NsFlags NsFlags
{
get { return _nsFlags; }
}
/// <summary>
/// Response code - this 4 bit field is set as part of
/// responses only.
/// </summary>
public RCode RCode
{
get { return _rCode; }
}
/// <summary>
/// QDCOUNT - an unsigned 16 bit integer specifying the number of
/// entries in the question section.
/// </summary>
public ushort Questions
{
get { return _questions; }
}
/// <summary>
/// ANCOUNT - an unsigned 16 bit integer specifying the number of
/// resource records in the answer section.
/// </summary>
public ushort AnswerRRs
{
get { return _answerRRs; }
}
/// <summary>
/// NSCOUNT - an unsigned 16 bit integer specifying the number of name
/// server resource records in the authority records
/// section.
/// </summary>
public ushort AuthorityRRs
{
get { return _authorityRRs; }
}
/// <summary>
/// ARCOUNT - an unsigned 16 bit integer specifying the number of
/// resource records in the additional records section.
/// </summary>
public ushort AdditionalRRs
{
get { return (ushort) _additionalRecords.Count; }
}
/// <summary>
/// QNAME - a domain name represented as a sequence of labels, where
/// each label consists of a length octet followed by that
/// number of octets. The domain name terminates with the
/// zero length octet for the null label of the root. Note
/// that this field may be an odd number of octets; no
/// padding is used
/// </summary>
public string Name
{
get { return _name; }
set { _name = value; }
}
/// <summary>
/// QTYPE - a two octet code which specifies the type of the query.
/// The values for this field include all codes valid for a
/// TYPE field, together with some more general codes which
/// can match more than one type of RR.
/// </summary>
public NsType NsType
{
get { return _nsType; }
set { _nsType = value; }
}
/// <summary>
/// QCLASS - a two octet code that specifies the class of the query.
/// For example, the QCLASS field is IN for the Internet.
/// </summary>
public NsClass NsClass
{
get { return _nsClass; }
set { _nsClass = value; }
}
public List<IDnsRecord> AdditionalRRecords
{
get { return _additionalRecords; }
}
#endregion
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Diagnostics;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Net.NetworkInformation;
using System.Security.Permissions;
using System.Text;
using DnDns.Enums;
using DnDns.Records;
using DnDns.Security;
namespace DnDns.Query
{
/// <summary>
/// Summary description for DnsQueryRequest.
/// </summary>
public class DnsQueryRequest : DnsQueryBase
{
private static Random r = new Random();
private DnsPermission _dnsPermissions;
private int _bytesSent = 0;
private int _socketTimeout = 5000;
/// <summary>
/// The number of bytes sent to query the DNS Server.
/// </summary>
public int BytesSent
{
get { return _bytesSent; }
}
/// <summary>
/// Gets or sets the amount of time in milliseconds that a DnsQueryRequest will wait to receive data once a read operation is initiated.
/// Defauts to 5 seconds (5000 ms)
/// </summary>
public int Timeout
{
get { return _socketTimeout; }
set { _socketTimeout = value; }
}
#region Constructors
public DnsQueryRequest()
{
_dnsPermissions = new DnsPermission(PermissionState.Unrestricted);
// Construct the class with some defaults
_transactionId = (ushort) r.Next();
_flags = 0;
_queryResponse = QueryResponse.Query;
this._opCode = OpCode.QUERY;
// Recursion Desired
this._nsFlags = NsFlags.RD;
this._questions = 1;
}
#endregion Constructors
private byte[] BuildQuery(string host)
{
string newHost;
int newLocation = 0;
int oldLocation = 0;
MemoryStream ms = new MemoryStream();
host = host.Trim();
// decide how to build this query based on type
switch (_nsType)
{
case NsType.PTR:
IPAddress queryIP = IPAddress.Parse(host);
// pointer should be translated as follows
// 209.115.22.3 -> 3.22.115.209.in-addr.arpa
char[] ipDelim = new char[] {'.'};
string[] s = host.Split(ipDelim,4);
newHost = String.Format("{0}.{1}.{2}.{3}.in-addr.arpa", s[3], s[2], s[1], s[0]);
break;
default:
newHost = host;
break;
}
// Package up the host
while(oldLocation < newHost.Length)
{
newLocation = newHost.IndexOf(".", oldLocation);
if (newLocation == -1) newLocation = newHost.Length;
byte subDomainLength = (byte)(newLocation - oldLocation);
char[] sub = newHost.Substring(oldLocation, subDomainLength).ToCharArray();
ms.WriteByte(subDomainLength);
ms.Write(Encoding.ASCII.GetBytes(sub, 0, sub.Length), 0, sub.Length);
oldLocation = newLocation + 1;
}
// Terminate the domain name w/ a 0x00.
ms.WriteByte(0x00);
return ms.ToArray();
}
/// <summary>
///
/// </summary>
/// <param name="host"></param>
/// <param name="queryType"></param>
/// <param name="queryClass"></param>
/// <param name="protocol"></param>
/// <returns></returns>
public DnsQueryResponse Resolve(string host, NsType queryType, NsClass queryClass, ProtocolType protocol)
{
return Resolve(host, queryType, queryClass, protocol, null);
}
public DnsQueryResponse Resolve(string host, NsType queryType, NsClass queryClass, ProtocolType protocol, TsigMessageSecurityProvider provider)
{
string dnsServer = string.Empty;
// Test for Unix/Linux OS
if (Tools.IsPlatformLinuxUnix())
{
dnsServer = Tools.DiscoverUnixDnsServerAddress();
}
else
{
IPAddressCollection dnsServerCollection = Tools.DiscoverDnsServerAddresses();
if (dnsServerCollection.Count == 0)
throw new Exception("Couldn't detect local DNS Server.");
dnsServer = dnsServerCollection[0].ToString();
}
if (String.IsNullOrEmpty(dnsServer))
throw new Exception("Couldn't detect local DNS Server.");
return Resolve(dnsServer, host, queryType, queryClass, protocol, provider);
}
/// <summary>
///
/// </summary>
/// <param name="dnsServer"></param>
/// <param name="host"></param>
/// <param name="queryType"></param>
/// <param name="queryClass"></param>
/// <param name="protocol"></param>
/// <param name="messageSecurityProvider">The instance of the message security provider to use to secure the DNS request.</param>
/// <returns>A <see cref="T:DnDns.Net.Dns.DnsQueryResponse"></see> instance that contains the Dns Answer for the request query.</returns>
/// <PermissionSet>
/// <IPermission class="System.Net.DnsPermission, System, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
/// </PermissionSet>
public DnsQueryResponse Resolve(string dnsServer, string host, NsType queryType, NsClass queryClass, ProtocolType protocol, IMessageSecurityProvider messageSecurityProvider)
{
// Do stack walk and Demand all callers have DnsPermission.
_dnsPermissions.Demand();
byte[] bDnsQuery = this.BuildDnsRequest(host, queryType, queryClass, protocol, messageSecurityProvider);
// Connect to DNS server and get the record for the current server.
IPHostEntry ipe = System.Net.Dns.GetHostEntry(dnsServer);
IPAddress ipa = ipe.AddressList[0];
IPEndPoint ipep = new IPEndPoint(ipa, (int)UdpServices.Domain);
byte[] recvBytes = null;
switch (protocol)
{
case ProtocolType.Tcp:
{
recvBytes = ResolveTcp(bDnsQuery, ipep);
break;
}
case ProtocolType.Udp:
{
recvBytes = ResolveUdp(bDnsQuery, ipep);
break;
}
default:
{
throw new InvalidOperationException("Invalid Protocol: " + protocol);
}
}
Trace.Assert(recvBytes != null, "Failed to retrieve data from the remote DNS server.");
DnsQueryResponse dnsQR = new DnsQueryResponse();
dnsQR.ParseResponse(recvBytes, protocol);
return dnsQR;
}
private byte[] ResolveUdp(byte[] bDnsQuery, IPEndPoint ipep)
{
// UDP messages, data size = 512 octets or less
UdpClient udpClient = new UdpClient();
byte[] recvBytes = null;
try
{
udpClient.Client.ReceiveTimeout = _socketTimeout;
udpClient.Connect(ipep);
udpClient.Send(bDnsQuery, bDnsQuery.Length);
recvBytes = udpClient.Receive(ref ipep);
}
finally
{
udpClient.Close();
}
return recvBytes;
}
private static byte[] ResolveTcp(byte[] bDnsQuery, IPEndPoint ipep)
{
TcpClient tcpClient = new TcpClient();
byte[] recvBytes = null;
try
{
tcpClient.Connect(ipep);
NetworkStream netStream = tcpClient.GetStream();
BinaryReader netReader = new System.IO.BinaryReader(netStream);
netStream.Write(bDnsQuery, 0, bDnsQuery.Length);
// wait until data is avail
while (!netStream.DataAvailable) ;
if (tcpClient.Connected && netStream.DataAvailable)
{
// Read first two bytes to find out the length of the response
byte[] bLen = new byte[2];
// NOTE: The order of the next two lines matter. Do not reorder
// Array indexes are also intentionally reversed
bLen[1] = (byte)netStream.ReadByte();
bLen[0] = (byte)netStream.ReadByte();
UInt16 length = BitConverter.ToUInt16(bLen, 0);
recvBytes = new byte[length];
netStream.Read(recvBytes, 0, length);
}
}
finally
{
tcpClient.Close();
}
return recvBytes;
}
private byte[] BuildDnsRequest(string host, NsType queryType, NsClass queryClass, ProtocolType protocol, IMessageSecurityProvider messageSecurityProvider)
{
// Combind the NsFlags with our constant flags
ushort flags = (ushort)((ushort)_queryResponse | (ushort)_opCode | (ushort)_nsFlags);
this._flags = flags;
//NOTE: This limits the librarys ablity to issue multiple queries per request.
this._nsType = queryType;
this._nsClass = queryClass;
this._name = host;
if(messageSecurityProvider != null)
{
messageSecurityProvider.SecureMessage(this);
}
byte[] bDnsQuery = GetMessageBytes();
// Add two byte prefix that contains the packet length per RFC 1035 section 4.2.2
if (protocol == ProtocolType.Tcp)
{
// 4.2.2. TCP usageMessages sent over TCP connections use server port 53 (decimal).
// The message is prefixed with a two byte length field which gives the message
// length, excluding the two byte length field. This length field allows the
// low-level processing to assemble a complete message before beginning to parse
// it.
int len = bDnsQuery.Length;
Array.Resize<byte>(ref bDnsQuery, len + 2);
Array.Copy(bDnsQuery, 0, bDnsQuery, 2, len);
bDnsQuery[0] = (byte)((len >> 8) & 0xFF);
bDnsQuery[1] = (byte)((len & 0xFF));
}
return bDnsQuery;
}
internal byte[] GetMessageBytes()
{
MemoryStream memoryStream = new MemoryStream();
byte[] data = new byte[2];
data = BitConverter.GetBytes((ushort)(IPAddress.HostToNetworkOrder(_transactionId) >> 16));
memoryStream.Write(data, 0, data.Length);
data = BitConverter.GetBytes((ushort)(IPAddress.HostToNetworkOrder(_flags) >> 16));
memoryStream.Write(data, 0, data.Length);
data = BitConverter.GetBytes((ushort)(IPAddress.HostToNetworkOrder(_questions) >> 16));
memoryStream.Write(data, 0, data.Length);
data = BitConverter.GetBytes((ushort)(IPAddress.HostToNetworkOrder(_answerRRs) >> 16));
memoryStream.Write(data, 0, data.Length);
data = BitConverter.GetBytes((ushort)(IPAddress.HostToNetworkOrder(_authorityRRs) >> 16));
memoryStream.Write(data, 0, data.Length);
data = BitConverter.GetBytes((ushort)(IPAddress.HostToNetworkOrder(_additionalRecords.Count) >> 16));
memoryStream.Write(data, 0, data.Length);
data = DnsHelpers.CanonicaliseDnsName(_name, false);
memoryStream.Write(data, 0, data.Length);
data = BitConverter.GetBytes((ushort)(IPAddress.HostToNetworkOrder((ushort)_nsType) >> 16));
memoryStream.Write(data, 0, data.Length);
data = BitConverter.GetBytes((ushort)(IPAddress.HostToNetworkOrder((ushort)_nsClass) >> 16));
memoryStream.Write(data, 0, data.Length);
foreach (IDnsRecord dnsRecord in AdditionalRRecords)
{
data = dnsRecord.GetMessageBytes();
memoryStream.Write(data, 0, data.Length);
}
Trace.WriteLine(String.Format("The message bytes: {0}", DnsHelpers.DumpArrayToString(memoryStream.ToArray())));
return memoryStream.ToArray();
}
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Net.Sockets;
using DnDns.Records;
using DnDns.Enums;
namespace DnDns.Query
{
/// <summary>
/// Summary description for DnsQueryResponse.
/// </summary>
public class DnsQueryResponse : DnsQueryBase
{
#region Fields
private DnsQueryRequest _queryRequest = new DnsQueryRequest();
private IDnsRecord[] _answers;
private IDnsRecord[] _authoritiveNameServers;
private int _bytesReceived = 0;
#endregion Fields
#region properties
public DnsQueryRequest QueryRequest
{
get { return _queryRequest; }
}
public IDnsRecord[] Answers
{
get { return _answers; }
}
public IDnsRecord[] AuthoritiveNameServers
{
get { return _authoritiveNameServers; }
}
public int BytesReceived
{
get { return _bytesReceived; }
}
#endregion
/// <summary>
///
/// </summary>
public DnsQueryResponse()
{
}
private DnsQueryRequest ParseQuery(ref MemoryStream ms)
{
DnsQueryRequest queryRequest = new DnsQueryRequest();
// Read name
queryRequest.Name = DnsRecordBase.ParseName(ref ms);
return queryRequest;
}
internal void ParseResponse(byte[] recvBytes, ProtocolType protocol)
{
MemoryStream memoryStream = new MemoryStream(recvBytes);
byte[] flagBytes = new byte[2];
byte[] transactionId = new byte[2];
byte[] questions = new byte[2];
byte[] answerRRs = new byte[2];
byte[] authorityRRs = new byte[2];
byte[] additionalRRCountBytes = new byte[2];
byte[] nsType = new byte[2];
byte[] nsClass = new byte[2];
this._bytesReceived = recvBytes.Length;
// Parse DNS Response
memoryStream.Read(transactionId, 0, 2);
memoryStream.Read(flagBytes, 0, 2);
memoryStream.Read(questions, 0, 2);
memoryStream.Read(answerRRs, 0, 2);
memoryStream.Read(authorityRRs, 0, 2);
memoryStream.Read(additionalRRCountBytes, 0, 2);
// Parse Header
_transactionId = (ushort)IPAddress.NetworkToHostOrder((short)BitConverter.ToUInt16(transactionId, 0));
_flags = (ushort)IPAddress.NetworkToHostOrder((short)BitConverter.ToUInt16(flagBytes, 0));
_queryResponse = (QueryResponse)(_flags & (ushort)FlagMasks.QueryResponseMask);
_opCode = (OpCode)(_flags & (ushort)FlagMasks.OpCodeMask);
_nsFlags = (NsFlags)(_flags & (ushort)FlagMasks.NsFlagMask);
_rCode = (RCode)(_flags & (ushort)FlagMasks.RCodeMask);
// Parse Questions Section
_questions = (ushort)IPAddress.NetworkToHostOrder((short)BitConverter.ToUInt16(questions, 0));
_answerRRs = (ushort)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(answerRRs, 0));
_authorityRRs = (ushort)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(authorityRRs, 0));
ushort additionalRRCount = (ushort)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(additionalRRCountBytes, 0));
_additionalRecords = new List<IDnsRecord>();
_answers = new DnsRecordBase[_answerRRs];
_authoritiveNameServers = new DnsRecordBase[_authorityRRs];
// Parse Queries
_queryRequest = this.ParseQuery(ref memoryStream);
// Read dnsType
memoryStream.Read(nsType, 0, 2);
// Read dnsClass
memoryStream.Read(nsClass, 0, 2);
_nsType = (NsType)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(nsType, 0));
_nsClass = (NsClass)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(nsClass, 0));
// Read in Answer Blocks
for (int i=0; i < _answerRRs; i++)
{
_answers[i] = RecordFactory.Create(ref memoryStream);
}
// Parse Authority Records
for (int i=0; i < _authorityRRs; i++)
{
_authoritiveNameServers[i] = RecordFactory.Create(ref memoryStream);
}
// Parse Additional Records
for (int i=0; i < additionalRRCount; i++)
{
_additionalRecords.Add(RecordFactory.Create(ref memoryStream));
}
}
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace DnDns.Records
{
/// <summary>
/// RFC 1035:
///
/// 3.4.1. A RDATA format
/// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
/// | ADDRESS |
/// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
///
/// where:
///
/// ADDRESS A 32 bit Internet address.
///
/// Hosts that have multiple Internet addresses will have multiple A
/// records.
///
/// A records cause no additional section processing. The RDATA section of
/// an A line in a master file is an Internet address expressed as four
/// decimal numbers separated by dots without any imbedded spaces (e.g.,
/// "10.2.0.52" or "192.0.5.6").
///
/// </summary>
public sealed class ARecord : DnsRecordBase, IDnsRecord
{
private string _hostAddress;
/// <summary>
/// The answer host address for the DNS A Record.
/// </summary>
public string HostAddress
{
get { return _hostAddress; }
}
internal ARecord(RecordHeader dnsHeader) : base(dnsHeader) { }
public override void ParseRecord(ref MemoryStream ms)
{
_hostAddress = ms.ReadByte() + "." + ms.ReadByte() + "." + ms.ReadByte() + "." + ms.ReadByte();
_answer = "Address: " + _hostAddress;
}
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace DnDns.Records
{
public sealed class AaaaRecord : DnsRecordBase
{
private string m_ipAddress;
internal AaaaRecord(RecordHeader dnsHeader) : base(dnsHeader) { }
public override void ParseRecord(ref MemoryStream ms)
{
// TODO: Test and incorporate BinToHex function below
m_ipAddress =
ms.ReadByte().ToString("x2") + ms.ReadByte().ToString("x2") + ":" + ms.ReadByte().ToString("x2") + ms.ReadByte().ToString("x2") + ":" +
ms.ReadByte().ToString("x2") + ms.ReadByte().ToString("x2") + ":" + ms.ReadByte().ToString("x2") + ms.ReadByte().ToString("x2") + ":" +
ms.ReadByte().ToString("x2") + ms.ReadByte().ToString("x2") + ":" + ms.ReadByte().ToString("x2") + ms.ReadByte().ToString("x2") + ":" +
ms.ReadByte().ToString("x2") + ms.ReadByte().ToString("x2") + ":" + ms.ReadByte().ToString("x2") + ms.ReadByte().ToString("x2");
_answer = "IPv6 Address: " + m_ipAddress;
}
// TODO: converted from VB.NET, test to make sure it works properly
private static string BinToHex(byte[] data)
{
if (data != null)
{
StringBuilder sb = new System.Text.StringBuilder(1024);
for (int i = 0; i < data.Length; i++)
{
sb.Append(data[i].ToString("X2"));
}
return sb.ToString();
}
else
{
return null;
}
}
// TODO: converted from VB.NET, test to make sure it works properly
private static byte[] HexToBin(string s)
{
int arraySize = s.Length / 2;
byte[] bytes = new byte[arraySize - 1];
int counter = 0;
for (int i = 0; i < s.Length - 1; i = 2)
{
string hexValue = s.Substring(i, 2);
// Tell convert to interpret the string as a 16 bit hex value
int intValue = Convert.ToInt32(hexValue, 16);
// Convert the integer to a byte and store it in the array
bytes[counter] = Convert.ToByte(intValue);
counter += 1;
}
return bytes;
}
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Net;
namespace DnDns.Records
{
public sealed class AfsdbRecord : DnsRecordBase
{
private ushort _port;
private string _name;
private short _type;
public ushort Port
{
get { return _port; }
}
public string AfsdbName
{
get { return _name; }
}
public short Type
{
get { return _type; }
}
internal AfsdbRecord(RecordHeader dnsHeader) : base(dnsHeader) { }
public override void ParseRecord(ref MemoryStream ms)
{
byte[] type = new byte[2];
ms.Read(type, 0, 2);
// _port = (ushort)Tools.ByteToUInt(type);
_port = (ushort)IPAddress.NetworkToHostOrder((short)BitConverter.ToUInt16(type, 0));
_name = DnsRecordBase.ParseName(ref ms);
//_type = (short)Tools.ByteToUInt(type);
_type = IPAddress.NetworkToHostOrder(BitConverter.ToInt16(type, 0));
_answer = "Name: " + _name + ", Port: " + _port + ", Type: " + _type;
}
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace DnDns.Records
{
public sealed class AtmaRecord : DnsRecordBase
{
private string _address;
private ATMFormat _format;
public string Address
{
get { return _address; }
}
public ATMFormat Format
{
get { return _format; }
}
internal AtmaRecord(RecordHeader dnsHeader) : base(dnsHeader) { }
public override void ParseRecord(ref MemoryStream ms)
{
byte[] address = new byte[this.DnsHeader.DataLength - 1];
_format = (ATMFormat)ms.ReadByte();
ms.Read(address, 0, this.DnsHeader.DataLength - 1);
_address = Encoding.ASCII.GetString(address);
_answer = "Address: " + _address + ", Format: " + _format;
}
public enum ATMFormat : byte
{
E164 = 0x01,
NSAP = 0x02
}
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Net;
using System.Diagnostics;
namespace DnDns.Records
{
/// <summary>
/// Handles a basic Dns record
///
/// From RFC 1035:
///
/// 3.2.1. Format
///
/// All RRs have the same top level format shown below:
///
/// 1 1 1 1 1 1
/// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
/// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
/// | |
/// / /
/// / NAME /
/// | |
/// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
/// | TYPE |
/// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
/// | CLASS |
/// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
/// | TTL |
/// | |
/// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
/// | RDLENGTH |
/// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--|
/// / RDATA /
/// / /
/// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
///
/// where:
///
/// NAME an owner name, i.e., the name of the node to which this
/// resource record pertains.
///
/// TYPE two octets containing one of the RR TYPE codes.
///
/// CLASS two octets containing one of the RR CLASS codes.
///
/// TTL a 32 bit signed integer that specifies the time interval
/// that the resource record may be cached before the source
/// of the information should again be consulted. Zero
/// values are interpreted to mean that the RR can only be
/// used for the transaction in progress, and should not be
/// cached. For example, SOA records are always distributed
/// with a zero TTL to prohibit caching. Zero values can
/// also be used for extremely volatile data.
///
/// RDLENGTH an unsigned 16 bit integer that specifies the length in
/// octets of the RDATA field.
///
/// RDATA a variable length string of octets that describes the
/// resource. The format of this information varies
/// according to the TYPE and CLASS of the resource record.
/// </summary>
public abstract class DnsRecordBase : IDnsRecord
{
#region Fields
// NAME an owner name, i.e., the name of the node to which this
// resource record pertains.
//private string _name;
// TYPE two octets containing one of the RR TYPE codes.
//protected NsType _nsType;
// CLASS - two octets containing one of the RR CLASS codes.
//private NsClass _nsClass;
// TTL - a 32 bit signed integer that specifies the time interval
// that the resource record may be cached before the source
// of the information should again be consulted. Zero
// values are interpreted to mean that the RR can only be
// used for the transaction in progress, and should not be
// cached. For example, SOA records are always distributed
// with a zero TTL to prohibit caching. Zero values can
/// also be used for extremely volatile data.
//private int _timeToLive;
// RDLENGTH - an unsigned 16 bit integer that specifies the length in
// octets of the RDATA field.
//protected short _dataLength;
protected RecordHeader _dnsHeader;
protected string _answer;
protected string _errorMsg;
#endregion
#region Properties
/// <summary>
/// NAME - an owner name, i.e., the name of the node to which this
/// resource record pertains.
/// </summary>
//public string Name
//{
// get { return _name; }
//}
public RecordHeader DnsHeader
{
get { return _dnsHeader; }
protected set { _dnsHeader = value; }
}
public string Answer
{
get { return _answer; }
}
/// <summary>
/// TYPE two octets containing one of the RR TYPE codes.
/// </summary>
//public NsType NsType
//{
// get { return _nsType; }
//}
/// <summary>
/// CLASS - two octets containing one of the RR CLASS codes.
/// </summary>
//public NsClass NsClass
//{
// get { return _nsClass; }
//}
/// <summary>
/// TTL - a 32 bit signed integer that specifies the time interval
/// that the resource record may be cached before the source
/// of the information should again be consulted. Zero
/// values are interpreted to mean that the RR can only be
/// used for the transaction in progress, and should not be
/// cached. For example, SOA records are always distributed
/// with a zero TTL to prohibit caching. Zero values can
/// also be used for extremely volatile data.
/// </summary>
//public int TimeToLive
//{
// get { return _timeToLive; }
//}
/// <summary>
/// RDLENGTH - an unsigned 16 bit integer that specifies the length in
/// octets of the RDATA field.
/// </summary>
//public short DataLength
//{
// get { return _dataLength; }
//}
public string ErrorMsg
{
get { return _errorMsg; }
}
#endregion
internal DnsRecordBase()
{
}
public virtual void ParseRecord(ref MemoryStream ms)
{
// Default implementation - the most common.
_answer = DnsRecordBase.ParseName(ref ms);
}
internal DnsRecordBase(RecordHeader dnsHeader)
{
_dnsHeader = dnsHeader;
}
// RFC
// 4.1.4. Message compression
//
// In order to reduce the size of messages, the domain system utilizes a
// compression scheme which eliminates the repetition of domain names in a
// message. In this scheme, an entire domain name or a list of labels at
// the end of a domain name is replaced with a pointer to a prior occurance
// of the same name.
//
// The pointer takes the form of a two octet sequence:
//
// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
// | 1 1| OFFSET |
// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
//
// The first two bits are ones. This allows a pointer to be distinguished
// from a label, since the label must begin with two zero bits because
// labels are restricted to 63 octets or less. (The 10 and 01 combinations
// are reserved for future use.) The OFFSET field specifies an offset from
// the start of the message (i.e., the first octet of the ID field in the
// domain header). A zero offset specifies the first byte of the ID field,
// etc.
//
// The compression scheme allows a domain name in a message to be
// represented as either:
//
// - a sequence of labels ending in a zero octet
// - a pointer
// - a sequence of labels ending with a pointer
//
internal static string ParseName(ref MemoryStream ms)
{
Trace.WriteLine("Reading Name...");
StringBuilder sb = new StringBuilder();
uint next = (uint)ms.ReadByte();
Trace.WriteLine("Next is 0x" + next.ToString("x2"));
int bPointer;
while ((next != 0x00))
{
// Isolate 2 most significat bits -> e.g. 11xx xxxx
// if it's 0xc0 (11000000b} then pointer
switch (0xc0 & next)
{
// 0xc0 -> Name is a pointer.
case 0xc0:
{
// Isolate Offset
int offsetMASK = ~0xc0;
// Example on how to calculate the offset
// e.g.
//
// So if given the following 2 bytes - 0xc1 0x1c (11000001 00011100)
//
// The pointer takes the form of a two octet sequence:
// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
// | 1 1| OFFSET |
// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
// | 1 1| 0 0 0 0 0 1 0 0 0 1 1 1 0 0|
// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
//
// A pointer is indicated by the a 1 in the two most significant bits
// The Offset is the remaining bits.
//
// The Pointer = 0xc0 (11000000 00000000)
// The offset = 0x11c (00000001 00011100)
// Move offset into the proper position
int offset = (int)(offsetMASK & next) << 8;
// extract the pointer to the data in the stream
bPointer = ms.ReadByte() + offset;
// store the position so we can resume later
long oldPtr = ms.Position;
// Move to the specified position in the stream and
// parse the name (recursive call)
ms.Position = bPointer;
sb.Append(DnsRecordBase.ParseName(ref ms));
Trace.WriteLine(sb.ToString());
// Move back to original position, and continue
ms.Position = oldPtr;
next = 0x00;
break;
}
case 0x00:
{
Debug.Assert(next < 0xc0, "Offset cannot be greater then 0xc0.");
byte[] buffer = new byte[next];
ms.Read(buffer, 0, (int)next);
sb.Append(Encoding.ASCII.GetString(buffer) + ".");
next = (uint)ms.ReadByte();
Trace.WriteLine("0x" + next.ToString("x2"));
break;
}
default:
throw new InvalidOperationException("There was a problem decompressing the DNS Message.");
}
}
return sb.ToString();
}
internal string ParseText(ref MemoryStream ms)
{
StringBuilder sb = new StringBuilder();
int len = ms.ReadByte();
byte[] buffer = new byte[len];
ms.Read(buffer, 0, len);
sb.Append(Encoding.ASCII.GetString(buffer));
return sb.ToString();
}
public override string ToString()
{
return _answer;
}
#region IDnsRecord Members
public virtual byte[] GetMessageBytes()
{
return new byte[]{};
}
#endregion
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace DnDns.Records
{
public sealed class CNameRecord : DnsRecordBase
{
internal CNameRecord(RecordHeader dnsHeader) : base(dnsHeader) {}
public override void ParseRecord(ref MemoryStream ms)
{
base.ParseRecord(ref ms);
_answer = "Host: " + _answer;
}
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace DnDns.Records
{
public sealed class HInfoRecord : DnsRecordBase
{
private string _cpuType;
private string _operatingSys;
public string CpuType
{
get { return _cpuType; }
}
public string OperatingSys
{
get { return _operatingSys; }
}
internal HInfoRecord(RecordHeader dnsHeader) : base(dnsHeader) { }
public override void ParseRecord(ref MemoryStream ms)
{
_cpuType = base.ParseText(ref ms);
_operatingSys = base.ParseText(ref ms);
_answer = "CPU: " + _cpuType + ", OS: " + _operatingSys;
}
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace DnDns.Records
{
public interface IDnsRecord
{
RecordHeader DnsHeader { get; }
string Answer { get; }
//short DataLength { get; }
string ErrorMsg { get; }
//string Name { get; }
//NsClass NsClass { get; }
//NsType NsType { get; }
//int TimeToLive { get; }
//void ParseRecordHeader(ref MemoryStream ms);
void ParseRecord(ref MemoryStream ms);
string ToString();
byte[] GetMessageBytes();
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace DnDns.Records
{
public sealed class IsdnRecord : DnsRecordBase
{
private string _address;
private string _subAddress;
public string Address
{
get { return _address; }
}
public string SubAddress
{
get { return _subAddress; }
}
internal IsdnRecord(RecordHeader dnsHeader) : base(dnsHeader) { }
public override void ParseRecord(ref MemoryStream ms)
{
_address = base.ParseText(ref ms);
_subAddress = base.ParseText(ref ms);
_answer = "ISDN Address: " + _address + ", SubAddress: " + _subAddress;
}
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Net;
namespace DnDns.Records
{
public sealed class LocRecord : DnsRecordBase
{
// For LOC
#region Fields
private byte _version;
private byte _size;
private byte _horPrecision;
private byte _vertPrecision;
private uint _latitude;
private uint _longitude;
private uint _altitude;
#endregion
#region Properties
public byte Version
{
get { return _version; }
}
public byte Size
{
get { return _size; }
}
public byte HorPrecision
{
get { return _horPrecision; }
}
public byte VertPrecision
{
get { return _vertPrecision; }
}
public uint Latitude
{
get { return _latitude; }
}
public uint Longitude
{
get { return _longitude; }
}
public uint Altitude
{
get { return _altitude; }
}
#endregion
private char[] _latDirection = new char[2] {'N', 'S'};
private char[] _longDirection = new char[2] {'E', 'W'};
internal LocRecord(RecordHeader dnsHeader) : base(dnsHeader) {}
public override void ParseRecord(ref MemoryStream ms)
{
byte[] latitude = new Byte[4];
byte[] longitude = new Byte[4];
byte[] altitude = new Byte[4];
_version = (byte)ms.ReadByte();
_size = (byte)ms.ReadByte();
_horPrecision = (byte)ms.ReadByte();
_vertPrecision = (byte)ms.ReadByte();
ms.Read(latitude,0,latitude.Length);
// _latitude = Tools.ByteToUInt(latitude);
_latitude = (uint)IPAddress.NetworkToHostOrder((int)BitConverter.ToUInt32(latitude, 0));
ms.Read(longitude,0,longitude.Length);
// _longitude = Tools.ByteToUInt(longitude);
_longitude = (uint)IPAddress.NetworkToHostOrder((int)BitConverter.ToUInt32(longitude, 0));
ms.Read(altitude,0,altitude.Length);
// _altitude = Tools.ByteToUInt(altitude);
_altitude = (uint)IPAddress.NetworkToHostOrder((int)BitConverter.ToUInt32(altitude, 0));
StringBuilder sb = new StringBuilder();
sb.Append("Version: ");
sb.Append(_version);
sb.Append("\r\n");
sb.Append("Size: ");
sb.Append(CalcSize(_size));
sb.Append(" m\r\n");
sb.Append("Horizontal Precision: ");
sb.Append(CalcSize(_horPrecision));
sb.Append(" m\r\n");
sb.Append("Vertical Precision: ");
sb.Append(CalcSize(_vertPrecision));
sb.Append(" m\r\n");
sb.Append("Latitude: ");
sb.Append(CalcLoc(_latitude, _latDirection));
sb.Append("\r\n");
sb.Append("Longitude: ");
sb.Append(CalcLoc(_longitude, _longDirection));
sb.Append("\r\n");
sb.Append("Altitude: ");
sb.Append((_altitude - 10000000) / 100.0);
sb.Append(" m\r\n");
_answer = sb.ToString();
}
private string CalcLoc(uint angle, char[] nsew)
{
char direction;
if (angle < 0x80000000)
{
angle = 0x80000000 - angle;
direction = nsew[1];
}
else
{
angle = angle - 0x80000000;
direction = nsew[0];
}
uint tsecs = angle % 1000;
angle = angle / 1000;
uint secs = angle % 60;
angle = angle / 60;
uint minutes = angle % 60;
uint degrees = angle / 60;
return degrees + " deg, " + minutes + " min " + secs+ "." + tsecs + " sec " + direction;
}
// return size in meters
private double CalcSize(byte val)
{
double size;
int exponent;
size = (val & 0xF0) >> 4;
exponent = (val & 0x0F);
while (exponent != 0)
{
size *= 10;
exponent--;
}
return size / 100;
}
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace DnDns.Records
{
public sealed class MInfoRecord : DnsRecordBase
{
private string _responsibleMb;
private string _errorMb;
public string ResponsibleMb
{
get { return _responsibleMb; }
}
public string ErrorMb
{
get { return _errorMb; }
}
internal MInfoRecord(RecordHeader dnsHeader) : base(dnsHeader) { }
public override void ParseRecord(ref MemoryStream ms)
{
_responsibleMb = DnsRecordBase.ParseName(ref ms);
_errorMb = DnsRecordBase.ParseName(ref ms);
_answer = "Responsible MailBox: " + _responsibleMb + ", Error MailBox: " + _errorMb;
}
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace DnDns.Records
{
public sealed class MbRecord : DnsRecordBase
{
internal MbRecord(RecordHeader dnsHeader) : base(dnsHeader) { }
//public override void ParseRecord(ref MemoryStream ms)
//{
// _answer = BaseDnsRecord.ParseName(ref ms);
//}
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace DnDns.Records
{
public sealed class MgRecord : DnsRecordBase
{
internal MgRecord(RecordHeader dnsHeader) : base(dnsHeader) { }
//public override void ParseRecord(ref MemoryStream ms)
//{
// _answer = BaseDnsRecord.ParseName(ref ms);
//}
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace DnDns.Records
{
public sealed class MrRecord : DnsRecordBase
{
internal MrRecord(RecordHeader dnsHeader) : base(dnsHeader) { }
//public override void ParseRecord(ref MemoryStream ms)
//{
// _answer = BaseDnsRecord.ParseName(ref ms);
//}
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Net;
namespace DnDns.Records
{
public sealed class MxRecord : DnsRecordBase
{
// For MX
private short _preference;
private string _mailExchange;
public short Preference
{
get { return _preference; }
}
public string MailExchange
{
get { return _mailExchange; }
}
internal MxRecord(RecordHeader dnsHeader) : base(dnsHeader) { }
public override void ParseRecord(ref MemoryStream ms)
{
// Preference is a function of MX records
byte[] nsPreference = new byte[2];
ms.Read(nsPreference, 0, 2);
//_preference = (short)Tools.ByteToUInt(nsPreference);
// TODO: Should this be a UShort instead of a short?
_preference = IPAddress.NetworkToHostOrder(BitConverter.ToInt16(nsPreference, 0));
// Parse Name
_mailExchange = DnsRecordBase.ParseName(ref ms);
_answer = "MX Preference: " + _preference + ", Mail Exchanger: " + _mailExchange;
}
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace DnDns.Records
{
public sealed class NsRecord : DnsRecordBase
{
internal NsRecord(RecordHeader dnsHeader) : base(dnsHeader) { }
//public override void ParseRecord(ref MemoryStream ms)
//{
// _answer = BaseDnsRecord.ParseName(ref ms);
//}
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace DnDns.Records
{
public sealed class PtrRecord : DnsRecordBase
{
internal PtrRecord(RecordHeader dnsHeader) : base(dnsHeader) { }
//public override void ParseRecord(ref MemoryStream ms)
//{
// _answer = BaseDnsRecord.ParseName(ref ms);
//}
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using DnDns.Enums;
namespace DnDns.Records
{
class RecordFactory
{
public static IDnsRecord Create(ref MemoryStream ms)
{
IDnsRecord dnsRecord;
// Have to start out with an unknown record, since we have to parse the entire
// header before we can determine the type of DNS record it is.
// TODO: Consider other options.
// start as an unknown type, then create a known type, parse the response
// and return the object.
//DnsRecordBase dr = new DnsUnknownRecord();
//dr.ParseRecordHeader(ref ms);
RecordHeader dnsHeader = new RecordHeader();
dnsHeader.ParseRecordHeader(ref ms);
switch (dnsHeader.NsType)
{
case NsType.A:
{
dnsRecord = new ARecord(dnsHeader);
break;
}
case NsType.AAAA:
{
dnsRecord = new AaaaRecord(dnsHeader);
break;
}
case NsType.MX:
{
dnsRecord = new MxRecord(dnsHeader);
break;
}
case NsType.RP:
{
dnsRecord = new RpRecord(dnsHeader);
break;
}
case NsType.MR:
{
dnsRecord = new MrRecord(dnsHeader);
break;
}
case NsType.MB:
{
dnsRecord = new MbRecord(dnsHeader);
break;
}
case NsType.MG:
{
dnsRecord = new MgRecord(dnsHeader);
break;
}
case NsType.NS:
{
dnsRecord = new NsRecord(dnsHeader);
break;
}
case NsType.CNAME:
{
dnsRecord = new CNameRecord(dnsHeader);
break;
}
case NsType.PTR:
{
dnsRecord = new PtrRecord(dnsHeader);
break;
}
case NsType.HINFO:
{
dnsRecord = new HInfoRecord(dnsHeader);
break;
}
case NsType.MINFO:
{
dnsRecord = new MInfoRecord(dnsHeader);
break;
}
case NsType.X25:
{
dnsRecord = new X25Record(dnsHeader);
break;
}
case NsType.TXT:
{
dnsRecord = new TxtRecord(dnsHeader);
break;
}
case NsType.LOC:
{
dnsRecord = new LocRecord(dnsHeader);
break;
}
case NsType.SOA:
{
dnsRecord = new SoaRecord(dnsHeader);
break;
}
case NsType.SRV:
{
dnsRecord = new SrvRecord(dnsHeader);
break;
}
case NsType.AFSDB:
{
dnsRecord = new AfsdbRecord(dnsHeader);
break;
}
case NsType.ATMA:
{
dnsRecord = new AtmaRecord(dnsHeader);
break;
}
case NsType.ISDN:
{
dnsRecord = new IsdnRecord(dnsHeader);
break;
}
case NsType.RT:
{
dnsRecord = new RtRecord(dnsHeader);
break;
}
case NsType.WKS:
{
dnsRecord = new WksRecord(dnsHeader);
break;
}
case NsType.TSIG:
{
dnsRecord = new TSigRecord(dnsHeader);
break;
}
default:
{
// Unknown type. parse and return the DnsUnknownRecord
dnsRecord = new UnknownRecord(dnsHeader);
break;
}
}
//dnsRecord.ParseRecordHeader(ref ms);
dnsRecord.ParseRecord(ref ms);
return dnsRecord;
}
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Net;
using DnDns.Enums;
namespace DnDns.Records
{
/// <summary>
/// The DnsRecordHeader class contains fields, properties and
/// parsing cababilities within the DNS Record except the the
/// RDATA. The Name, Type, Class, TTL, and RDLength.
///
/// This class is used in the DnsRecordFactory to instantiate
/// concrete DnsRecord Classes.
///
/// RFC 1035
///
/// 3.2.1. Format
///
/// All RRs have the same top level format shown below:
///
/// 1 1 1 1 1 1
/// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
/// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
/// | |
/// / /
/// / NAME /
/// | |
/// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
/// | TYPE |
/// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
/// | CLASS |
/// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
/// | TTL |
/// | |
/// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
/// | RDLENGTH |
/// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--|
///
/// where:
///
/// NAME an owner name, i.e., the name of the node to which this
/// resource record pertains.
///
/// TYPE two octets containing one of the RR TYPE codes.
///
/// CLASS two octets containing one of the RR CLASS codes.
///
/// TTL a 32 bit signed integer that specifies the time interval
/// that the resource record may be cached before the source
/// of the information should again be consulted. Zero
/// values are interpreted to mean that the RR can only be
/// used for the transaction in progress, and should not be
/// cached. For example, SOA records are always distributed
/// with a zero TTL to prohibit caching. Zero values can
/// also be used for extremely volatile data.
///
/// RDLENGTH an unsigned 16 bit integer that specifies the length in
/// octets of the RDATA field.
///
/// </summary>
public class RecordHeader
{
#region Fields
// NAME an owner name, i.e., the name of the node to which this
// resource record pertains.
private string _name;
// TYPE two octets containing one of the RR TYPE codes.
private NsType _nsType;
// CLASS - two octets containing one of the RR CLASS codes.
private NsClass _nsClass;
// TTL - a 32 bit signed integer that specifies the time interval
// that the resource record may be cached before the source
// of the information should again be consulted. Zero
// values are interpreted to mean that the RR can only be
// used for the transaction in progress, and should not be
// cached. For example, SOA records are always distributed
// with a zero TTL to prohibit caching. Zero values can
/// also be used for extremely volatile data.
private int _timeToLive;
// RDLENGTH - an unsigned 16 bit integer that specifies the length in
// octets of the RDATA field.
private short _dataLength;
/// <summary>
/// Initalise the <see cref="RecordHeader"/>
/// </summary>
/// <param name="name">The header name</param>
/// <param name="nsType">The resource type</param>
/// <param name="nsClass">The class type</param>
/// <param name="timeToLive">The time to live</param>
public RecordHeader(string name, NsType nsType, NsClass nsClass, int timeToLive)
{
_name = name;
_nsType = nsType;
_nsClass = nsClass;
_timeToLive = timeToLive;
}
public RecordHeader()
{
}
#endregion
#region Properties
/// <summary>
/// NAME - an owner name, i.e., the name of the node to which this
/// resource record pertains.
/// </summary>
public string Name
{
get { return _name; }
}
/// <summary>
/// TYPE two octets containing one of the RR TYPE codes.
/// </summary>
public NsType NsType
{
get { return _nsType; }
}
/// <summary>
/// CLASS - two octets containing one of the RR CLASS codes.
/// </summary>
public NsClass NsClass
{
get { return _nsClass; }
}
/// <summary>
/// TTL - a 32 bit signed integer that specifies the time interval
/// that the resource record may be cached before the source
/// of the information should again be consulted. Zero
/// values are interpreted to mean that the RR can only be
/// used for the transaction in progress, and should not be
/// cached. For example, SOA records are always distributed
/// with a zero TTL to prohibit caching. Zero values can
/// also be used for extremely volatile data.
/// </summary>
public int TimeToLive
{
get { return _timeToLive; }
}
/// <summary>
/// RDLENGTH - an unsigned 16 bit integer that specifies the length in
/// octets of the RDATA field.
/// </summary>
public short DataLength
{
get { return _dataLength; }
}
#endregion
/// <summary>
///
/// </summary>
/// <param name="ms"></param>
public void ParseRecordHeader(ref MemoryStream ms)
{
byte[] nsType = new byte[2];
byte[] nsClass = new byte[2];
byte[] nsTTL = new byte[4];
byte[] nsDataLength = new byte[2];
// Read the name
_name = DnsRecordBase.ParseName(ref ms);
// Read the data header
ms.Read(nsType, 0, 2);
ms.Read(nsClass, 0, 2);
ms.Read(nsTTL, 0, 4);
ms.Read(nsDataLength, 0, 2);
_nsType = (NsType)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(nsType, 0));
_nsClass = (NsClass)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(nsClass, 0));
_timeToLive = IPAddress.NetworkToHostOrder(BitConverter.ToInt32(nsTTL, 0));
_dataLength = IPAddress.NetworkToHostOrder(BitConverter.ToInt16(nsDataLength, 0));
}
internal byte[] GetMessageBytes()
{
MemoryStream memoryStream = new MemoryStream();
byte[] data = DnsHelpers.CanonicaliseDnsName(_name, false);
memoryStream.Write(data,0,data.Length);
data = BitConverter.GetBytes((ushort)(IPAddress.HostToNetworkOrder((ushort)_nsType) >> 16));
memoryStream.Write(data, 0, data.Length);
data = BitConverter.GetBytes((ushort)(IPAddress.HostToNetworkOrder((ushort)_nsClass) >> 16));
memoryStream.Write(data, 0, data.Length);
data = BitConverter.GetBytes((uint)(IPAddress.HostToNetworkOrder((ushort)_timeToLive) >> 32));
memoryStream.Write(data, 0, data.Length);
data = BitConverter.GetBytes((ushort)(IPAddress.HostToNetworkOrder((ushort)_dataLength) >> 16));
memoryStream.Write(data, 0, data.Length);
return memoryStream.ToArray();
}
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace DnDns.Records
{
public sealed class RpRecord : DnsRecordBase
{
// For RP
private string _name;
private string _textLocation;
public string RpName
{
get { return _name; }
}
public string TextLocation
{
get { return _textLocation; }
}
internal RpRecord(RecordHeader dnsHeader) : base(dnsHeader) {}
public override void ParseRecord(ref MemoryStream ms)
{
_name = DnsRecordBase.ParseName(ref ms);
_textLocation = DnsRecordBase.ParseName(ref ms);
_answer = _name + ", " + _textLocation;
}
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Net;
namespace DnDns.Records
{
public sealed class RtRecord : DnsRecordBase
{
private ushort _preference;
private string _intermediateHost;
public ushort Preference
{
get { return _preference; }
}
public string IntermediateHost
{
get { return _intermediateHost; }
}
internal RtRecord(RecordHeader dnsHeader) : base(dnsHeader) { }
public override void ParseRecord(ref MemoryStream ms)
{
byte[] preference = new byte[2];
ms.Read(preference, 0, 2);
//_preference = (ushort)Tools.ByteToUInt(preference);
_preference = (ushort)IPAddress.NetworkToHostOrder((short)BitConverter.ToUInt16(preference, 0));
_intermediateHost = DnsRecordBase.ParseName(ref ms);
_answer = "Preference: " + _preference + ", Intermediate Host: " + _intermediateHost;
}
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Net;
namespace DnDns.Records
{
public sealed class SoaRecord : DnsRecordBase
{
// For SOA
#region fields
private string _primaryNameServer;
private string _responsiblePerson;
private uint _serial;
private uint _refreshInterval;
private uint _retryInterval;
private uint _expirationLimit;
// RFC 1034: TTL - only positive values of a signed 32 bit number.
private int _minimumTimeToLive;
#endregion
#region properties
public string PrimaryNameServer
{
get { return _primaryNameServer; }
}
public string ResponsiblePerson
{
get { return _responsiblePerson; }
}
public uint Serial
{
get { return _serial; }
}
public uint RefreshInterval
{
get { return _refreshInterval; }
}
public uint RetryInterval
{
get { return _retryInterval; }
}
public uint ExpirationLimit
{
get { return _expirationLimit; }
}
public int MinimumTimeToLive
{
get { return _minimumTimeToLive; }
}
#endregion
internal SoaRecord(RecordHeader dnsHeader) : base(dnsHeader) { }
public override void ParseRecord(ref MemoryStream ms)
{
StringBuilder sb = new StringBuilder();
// Parse Name
_primaryNameServer = DnsRecordBase.ParseName(ref ms);
sb.Append("Primary NameServer: ");
sb.Append(_primaryNameServer);
sb.Append("\r\n");
// Parse Responsible Persons Mailbox (Parse Name)
_responsiblePerson = DnsRecordBase.ParseName(ref ms);
sb.Append("Responsible Person: ");
sb.Append(_responsiblePerson);
sb.Append("\r\n");
byte[] serial = new Byte[4];
byte[] refreshInterval = new Byte[4];
byte[] retryInterval = new Byte[4];
byte[] expirationLimit = new Byte[4];
byte[] minTTL = new Byte[4];
// Parse Serial (4 bytes)
ms.Read(serial, 0, 4);
//_serial = Tools.ByteToUInt(serial);
_serial = (uint)IPAddress.NetworkToHostOrder(BitConverter.ToInt32(serial, 0));
sb.Append("Serial: ");
sb.Append(_serial);
sb.Append("\r\n");
// Parse Refresh Interval (4 bytes)
ms.Read(refreshInterval, 0, 4);
// _refreshInterval = Tools.ByteToUInt(refreshInterval);
_refreshInterval = (uint)IPAddress.NetworkToHostOrder(BitConverter.ToInt32(refreshInterval, 0));
sb.Append("Refresh Interval: ");
sb.Append(_refreshInterval);
sb.Append("\r\n");
// Parse Retry Interval (4 bytes)
ms.Read(retryInterval, 0, 4);
//_retryInterval = Tools.ByteToUInt(retryInterval);
_retryInterval = (uint)IPAddress.NetworkToHostOrder(BitConverter.ToInt32(retryInterval, 0));
sb.Append("Retry Interval: ");
sb.Append(_retryInterval);
sb.Append("\r\n");
// Parse Expiration limit (4 bytes)
ms.Read(expirationLimit, 0, 4);
// _expirationLimit = Tools.ByteToUInt(expirationLimit);
_expirationLimit = (uint)IPAddress.NetworkToHostOrder(BitConverter.ToInt32(expirationLimit, 0));
sb.Append("Expire: ");
sb.Append(_expirationLimit);
sb.Append("\r\n");
// Parse Min TTL (4 bytes)
ms.Read(minTTL, 0, 4);
// _minTTL = Tools.ByteToUInt(minTTL);
_minimumTimeToLive = IPAddress.NetworkToHostOrder(BitConverter.ToInt32(minTTL, 0));
sb.Append("TTL: ");
sb.Append(_minimumTimeToLive);
sb.Append("\r\n");
_answer = sb.ToString();
}
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Net;
namespace DnDns.Records
{
public sealed class SrvRecord : DnsRecordBase
{
// For SRV
private ushort _priority;
private ushort _weight;
private ushort _port;
private string _hostName;
public ushort Priority
{
get { return _priority; }
}
public ushort Weight
{
get { return _weight; }
}
public ushort Port
{
get { return _port; }
}
public string HostName
{
get { return _hostName; }
}
internal SrvRecord(RecordHeader dnsHeader) : base(dnsHeader) { }
public override void ParseRecord(ref MemoryStream ms)
{
byte[] priority = new byte[2];
ms.Read(priority, 0, 2);
//_priority = (ushort)Tools.ByteToUInt(Priority);
_priority = (ushort)IPAddress.NetworkToHostOrder((short)BitConverter.ToUInt16(priority, 0));
byte[] weight = new byte[2];
ms.Read(weight, 0, 2);
// _weight = (ushort)Tools.ByteToUInt(Weight);
_weight = (ushort)IPAddress.NetworkToHostOrder((short)BitConverter.ToUInt16(weight, 0));
byte[] port = new byte[2];
ms.Read(port, 0, 2);
//_port = (ushort)Tools.ByteToUInt(port);
_port = (ushort)IPAddress.NetworkToHostOrder((short)BitConverter.ToUInt16(port, 0));
_hostName = DnsRecordBase.ParseName(ref ms);
_answer = "Service Location: \r\nPriority: " + _priority + "\r\nWeight: " +
_weight + "\r\nPort: " + _port + "\r\nHostName: " + _hostName + "\r\n";
}
}
}

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using System;
using System.IO;
using System.Net;
using System.Text;
using DnDns.Enums;
namespace DnDns.Records
{
/// <summary>
/// Implementation of a TSIG record structure as per RFC 2845
/// </summary>
public sealed class TSigRecord : DnsRecordBase
{
private string _algorithmName;
private RCode _error;
private ushort _fudge;
private ushort _originalId;
private byte[] _otherData;
private byte[] _mac;
private DateTime _timeSigned;
public string AlgorithmName
{
get { return _algorithmName; }
}
public RCode Error
{
get { return _error; }
}
public ushort Fudge
{
get { return _fudge; }
}
public ushort OriginalID
{
get { return _originalId; }
}
public byte[] OtherData
{
get { return _otherData; }
}
public byte[] Mac
{
get { return _mac; }
}
public DateTime TimeSigned
{
get { return _timeSigned; }
}
public TSigRecord(RecordHeader dnsHeader) : base(dnsHeader)
{
}
public TSigRecord(string name, string algorithmName, RCode error, ushort fudge, ushort originalId, byte[] otherData, byte[] mac, DateTime timeSigned)
{
DnsHeader = new RecordHeader(name, NsType.TSIG, NsClass.ANY, 0);
_algorithmName = algorithmName;
_error = error;
_fudge = fudge;
_originalId = originalId;
_otherData = otherData;
_mac = mac;
_timeSigned = timeSigned;
if(otherData == null)
{
_otherData = new byte[]{};
}
}
public override void ParseRecord(ref MemoryStream memoryStream)
{
Byte[] dataUInt16 = new byte[2];
Byte[] dataUInt32 = new byte[4];
_algorithmName = ParseName(ref memoryStream);
memoryStream.Read(dataUInt16, 0, dataUInt16.Length);
long timeHigh = (ushort) IPAddress.NetworkToHostOrder((short)BitConverter.ToUInt16(dataUInt16, 0));
memoryStream.Read(dataUInt32, 0, dataUInt32.Length);
long timeLow = (uint) IPAddress.NetworkToHostOrder((int)BitConverter.ToUInt32(dataUInt32, 0));
_timeSigned = DnsHelpers.ConvertFromDnsTime(timeLow, timeHigh);
memoryStream.Read(dataUInt16, 0, dataUInt16.Length);
_fudge = (ushort)IPAddress.NetworkToHostOrder((short)BitConverter.ToUInt16(dataUInt16, 0));
memoryStream.Read(dataUInt16, 0, dataUInt16.Length);
Int32 macLen = (ushort)IPAddress.NetworkToHostOrder((short)BitConverter.ToUInt16(dataUInt16, 0));
_mac = new byte[macLen];
memoryStream.Read(_mac, 0, macLen);
memoryStream.Read(dataUInt16, 0, dataUInt16.Length);
_originalId = (ushort)IPAddress.NetworkToHostOrder((short)BitConverter.ToUInt16(dataUInt16, 0));
memoryStream.Read(dataUInt16, 0, dataUInt16.Length);
_error = (RCode)IPAddress.NetworkToHostOrder((short)BitConverter.ToUInt16(dataUInt16, 0));
memoryStream.Read(dataUInt16, 0, dataUInt16.Length);
Int32 otherLen = (ushort)IPAddress.NetworkToHostOrder((short)BitConverter.ToUInt16(dataUInt16, 0));
if(otherLen > 0)
{
_otherData = new byte[otherLen];
memoryStream.Read(_otherData, 0, otherLen);
}
else
{
_otherData = null;
}
_answer = ToString();
}
public override byte[] GetMessageBytes()
{
MemoryStream memoryStream = new MemoryStream();
byte[] data = DnsHeader.GetMessageBytes();
memoryStream.Write(data,0,data.Length);
long rLengthPosition = memoryStream.Position;
data = DnsHelpers.CanonicaliseDnsName(_algorithmName, false);
memoryStream.Write(data, 0, data.Length);
int timeHigh;
long timeLow;
DnsHelpers.ConvertToDnsTime(_timeSigned.ToUniversalTime(), out timeHigh, out timeLow);
data = BitConverter.GetBytes((ushort)(IPAddress.HostToNetworkOrder((ushort)timeHigh) >> 16));
memoryStream.Write(data, 0, data.Length);
data = BitConverter.GetBytes((uint)(IPAddress.HostToNetworkOrder((uint)timeLow) >> 32));
memoryStream.Write(data, 0, data.Length);
data = BitConverter.GetBytes((ushort)(IPAddress.HostToNetworkOrder(_fudge) >> 16));
memoryStream.Write(data, 0, data.Length);
data = BitConverter.GetBytes((ushort)(IPAddress.HostToNetworkOrder(_mac.Length) >> 16));
memoryStream.Write(data, 0, data.Length);
memoryStream.Write(_mac, 0, _mac.Length);
data = BitConverter.GetBytes((ushort)(IPAddress.HostToNetworkOrder(_originalId) >> 16));
memoryStream.Write(data, 0, data.Length);
data = BitConverter.GetBytes((ushort)(IPAddress.HostToNetworkOrder((ushort)_error) >> 16));
memoryStream.Write(data, 0, data.Length);
data = BitConverter.GetBytes((ushort)(IPAddress.HostToNetworkOrder((ushort)_otherData.Length) >> 16));
memoryStream.Write(data, 0, data.Length);
if(_otherData.Length != 0)
{
memoryStream.Write(_otherData, 0, _otherData.Length);
}
// Add the rdata lenght
long rlength = memoryStream.Position - rLengthPosition;
memoryStream.Seek(rLengthPosition - 2, SeekOrigin.Begin);
data = BitConverter.GetBytes((ushort)(IPAddress.HostToNetworkOrder((ushort)rlength) >> 16));
memoryStream.Write(data, 0, data.Length);
return memoryStream.ToArray();
}
public override string ToString()
{
StringBuilder sb = new StringBuilder();
sb.Append(_algorithmName);
sb.Append(" ");
sb.Append(_timeSigned);
sb.Append(" ");
sb.Append(_fudge);
sb.Append(" ");
sb.Append(_mac.Length);
sb.Append(" ");
sb.Append(Convert.ToBase64String(Mac));
sb.Append(" ");
sb.Append(_error);
sb.Append(" ");
if (_otherData == null)
{
sb.Append(0);
}
else
{
sb.Append(_otherData.Length);
sb.Append(" ");
if (_error == RCode.BADTIME)
{
if (_otherData.Length != 6)
{
sb.Append("<invalid BADTIME other data>");
}
else
{
long time = ((long)(_otherData[0] & 0xFF) << 40) +
((long)(_otherData[1] & 0xFF) << 32) +
((_otherData[2] & 0xFF) << 24) +
((_otherData[3] & 0xFF) << 16) +
((_otherData[4] & 0xFF) << 8) +
((_otherData[5] & 0xFF));
sb.Append("<server time: ");
sb.Append(DnsHelpers.ConvertFromDnsTime(time));
sb.Append(">");
}
}
else
{
sb.Append("<");
sb.Append(Convert.ToBase64String(_otherData));
sb.Append(">");
}
}
return sb.ToString();
}
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace DnDns.Records
{
/// <summary>
///
/// </summary>
public sealed class TxtRecord : DnsRecordBase
{
private string _text;
public string Text
{
get { return _text; }
}
internal TxtRecord(RecordHeader dnsHeader) : base(dnsHeader) { }
public override void ParseRecord(ref MemoryStream ms)
{
_text = base.ParseText(ref ms);
_answer = "text: " + _text;
}
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace DnDns.Records
{
class UnknownRecord : DnsRecordBase
{
public UnknownRecord(RecordHeader dnsHeader) : base(dnsHeader) { }
public override void ParseRecord(ref MemoryStream ms)
{
// Type not implemented so we read it into a buffer and print out the data.
StringBuilder sb = new StringBuilder(this.DnsHeader.DataLength);
byte[] b = new byte[1];
// Loop over data, if char is easily converted to ASCII, convert it.
// Otherwise print a '.'
for (int i = 0; i < this.DnsHeader.DataLength; i++)
{
ms.Read(b, 0, 1);
if ((b[0] > 0x20) && (b[0] < 0x7e))
{
sb.Append(Encoding.ASCII.GetString(b));
}
else
{
sb.Append('.');
}
}
_answer = sb.ToString();
_errorMsg = "Type " + this.DnsHeader.NsType + " not implemented.";
}
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Net;
using System.Net.Sockets;
namespace DnDns.Records
{
public sealed class WksRecord : DnsRecordBase
{
private ProtocolType _protocolType;
private IPAddress _ipAddress;
private short[] _ports;
public ProtocolType ProtocolType
{
get { return _protocolType; }
set { _protocolType = value; }
}
public IPAddress IpAddress
{
get { return _ipAddress; }
set { _ipAddress = value; }
}
public short[] Ports
{
get { return _ports; }
set { _ports = value; }
}
internal WksRecord(RecordHeader dnsHeader) : base(dnsHeader) { }
public override void ParseRecord(ref MemoryStream ms)
{
// Bit map is the data length minus the IpAddress (4 bytes) and the Protocol (1 byte), 5 bytes total.
int bitMapLen = this.DnsHeader.DataLength - 4 - 1;
byte[] ipAddr = new byte[4];
byte[] BitMap = new byte[bitMapLen];
ms.Read(ipAddr, 0, 4);
// _ipAddress = new IPAddress(Tools.ToUInt32(ipAddr, 0));
_ipAddress = new IPAddress((uint)IPAddress.NetworkToHostOrder(BitConverter.ToUInt32(ipAddr, 0)));
_protocolType = (ProtocolType)ms.ReadByte();
ms.Read(BitMap, 0, BitMap.Length);
_ports = GetKnownServices(BitMap);
_answer = _protocolType + ": " + Tools.GetServByPort(_ports, _protocolType);
}
private short[] GetKnownServices(byte[] BitMap)
{
short[] tempPortArr = new short[1024];
int portCount = 0;
// mask to isolate left most bit
const byte mask = 0x80;
// Iterate through each byte
for (int i = 0; i < BitMap.Length; i++)
{
byte currentByte = BitMap[i];
int count = 0;
// iterate through each bit
for (byte j = 0x07; j != 0xFF; j--)
{
int port = (((i * 8) + count++) + 1);
currentByte = (byte)(currentByte << 1);
// is the flag set?
if ((mask & currentByte) == 0x80)
{
tempPortArr[portCount] = (short)port;
portCount++;
}
}
}
short[] portArr = new short[portCount];
Array.Copy(tempPortArr, 0, portArr, 0, portCount);
return portArr;
}
}
}

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/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace DnDns.Records
{
public sealed class X25Record : DnsRecordBase
{
private string _x25Address;
public string X25Address
{
get { return _x25Address; }
}
internal X25Record(RecordHeader dnsHeader) : base(dnsHeader) { }
public override void ParseRecord(ref MemoryStream ms)
{
_x25Address = base.ParseText(ref ms);
_answer = "X.25 X.121 Address: " + _x25Address;
}
}
}

12
SMTPServer/SMTPServer/DNSClient/Security/IMessageSecurityProvider.cs Normal file
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@ -0,0 +1,12 @@
using System;
using System.Collections.Generic;
using System.Text;
using DnDns.Query;
namespace DnDns.Security
{
public interface IMessageSecurityProvider
{
DnsQueryRequest SecureMessage(DnsQueryRequest dnsQueryRequest);
}
}

109
SMTPServer/SMTPServer/DNSClient/Security/TsigMessageSecurityProvider.cs Normal file
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@ -0,0 +1,109 @@
using System;
using System.Diagnostics;
using System.IO;
using System.Net;
using System.Security.Cryptography;
using DnDns.Enums;
using DnDns.Query;
using DnDns.Records;
namespace DnDns.Security
{
/// <summary>
/// Implements TSIG signing of DNS messages as per RFC2845
/// </summary>
/// <remarks>This class only supports the one hashing algorithim, hmac-sha256.
/// It would be trivial to add more.</remarks>
public class TsigMessageSecurityProvider : IMessageSecurityProvider
{
private const string Hmacsha1String = "hmac-sha256.";
private readonly string _name;
private readonly string _algorithimName;
private readonly ushort _fudge;
private readonly byte[] _sharedKey;
private readonly HMACSHA256 _hmac;
/// <summary>
/// Initalise the <see cref="TsigMessageSecurityProvider"/>
/// </summary>
/// <param name="name">The name of the shared key</param>
/// <param name="sharedKey">The shared key in base64 string format</param>
/// <param name="fudge">The signing time fudge value</param>
public TsigMessageSecurityProvider(string name, string sharedKey, ushort fudge)
{
_name = name;
_fudge = fudge;
_sharedKey = Convert.FromBase64String(sharedKey);
if (_sharedKey == null)
{
throw new ArgumentException("Argument is not a valid base64 string", "sharedKey");
}
_hmac = new HMACSHA256(_sharedKey);
_algorithimName = Hmacsha1String;
}
#region IMessageSecurityProvider Members
/// <summary>
/// Apply a TSIG record to the request message.
/// </summary>
/// <param name="dnsQueryRequest">The <see cref="DnsQueryRequest"/> to add the security headers too.</param>
/// <returns>A <see cref="DnsQueryRequest"/> instance with additional security attributes assigned.</returns>
public DnsQueryRequest SecureMessage(DnsQueryRequest dnsQueryRequest)
{
DateTime signDateTime = DateTime.Now;
int timeHigh;
long timeLow;
byte[] messageBytes = dnsQueryRequest.GetMessageBytes();
Trace.WriteLine(String.Format("Message Header Bytes: {0}", DnsHelpers.DumpArrayToString(messageBytes)));
MemoryStream memoryStream = new MemoryStream();
memoryStream.Write(messageBytes, 0, messageBytes.Length);
// the shared key name
byte[] data = DnsHelpers.CanonicaliseDnsName(_name, false);
memoryStream.Write(data, 0, data.Length);
data = BitConverter.GetBytes((ushort) (IPAddress.HostToNetworkOrder((ushort) NsClass.ANY) >> 16));
memoryStream.Write(data, 0, data.Length);
// the TTL value
data = BitConverter.GetBytes((uint) (IPAddress.HostToNetworkOrder((uint) 0) >> 32));
memoryStream.Write(data, 0, data.Length);
// the algorithim name
data = DnsHelpers.CanonicaliseDnsName(_algorithimName, true);
memoryStream.Write(data, 0, data.Length);
DnsHelpers.ConvertToDnsTime(signDateTime.ToUniversalTime(), out timeHigh, out timeLow);
data = BitConverter.GetBytes((ushort)(IPAddress.HostToNetworkOrder((ushort)timeHigh) >> 16));
memoryStream.Write(data, 0, data.Length);
data = BitConverter.GetBytes((uint) (IPAddress.HostToNetworkOrder((uint)timeLow) >> 32));
memoryStream.Write(data, 0, data.Length);
data = BitConverter.GetBytes((ushort) (IPAddress.HostToNetworkOrder(_fudge) >> 16));
memoryStream.Write(data, 0, data.Length);
data = BitConverter.GetBytes((ushort) (IPAddress.HostToNetworkOrder((ushort) RCode.NoError) >> 16));
memoryStream.Write(data, 0, data.Length);
// no other data
data = BitConverter.GetBytes((ushort) (IPAddress.HostToNetworkOrder((ushort) 0) >> 16));
memoryStream.Write(data, 0, data.Length);
byte[] dataToHash = memoryStream.ToArray();
Trace.WriteLine(String.Format("Data to hash: {0}", DnsHelpers.DumpArrayToString(dataToHash)));
byte[] mac = _hmac.ComputeHash(dataToHash);
Trace.WriteLine(String.Format("hash: {0}", DnsHelpers.DumpArrayToString(mac)));
dnsQueryRequest.AdditionalRRecords.Add(new TSigRecord(_name, _algorithimName, RCode.NoError, _fudge, dnsQueryRequest.TransactionID, new byte[] { }, mac, signDateTime));
return dnsQueryRequest;
}
#endregion
}
}

221
SMTPServer/SMTPServer/DNSClient/Tools.cs Normal file
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@ -0,0 +1,221 @@
/**********************************************************************
* Copyright (c) 2010, j. montgomery *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* *
* + Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* *
* + Redistributions in binary form must reproduce the above copyright*
* notice, this list of conditions and the following disclaimer *
* in the documentation and/or other materials provided with the *
* distribution. *
* *
* + Neither the name of j. montgomery's employer nor the names of *
* its contributors may be used to endorse or promote products *
* derived from this software without specific prior written *
* permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,*
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES *
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR *
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) *
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,*
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED*
* OF THE POSSIBILITY OF SUCH DAMAGE. *
**********************************************************************/
using System;
using System.Text;
using System.Net;
using System.Net.NetworkInformation;
using System.Net.Sockets;
using DnDns.Enums;
namespace DnDns
{
public class Tools
{
/// <summary>
/// Look up the port names for the given array of port numbers.
/// </summary>
/// <param name="port">An array of port numbers.</param>
/// <param name="proto">The protocol type. (TCP or UPD)</param>
/// <returns>The name of the port.</returns>
public static string GetServByPort(short[] port, ProtocolType proto)
{
StringBuilder sb = new StringBuilder();
for (int i=0; i < port.Length; i++)
{
sb.Append(GetServByPort(port[i], proto));
sb.Append(", ");
}
sb.Remove(sb.Length-2,2);
return sb.ToString();
}
/// <summary>
/// Tests to see if this is running on a Linux or Unix Platform
/// </summary>
/// <returns>true if unix or linux is detected</returns>
//public static bool IsPlatformLinuxUnix()
//{
// int p = (int)Environment.OSVersion.Platform;
// Test for Unix / Linux OS
// if (p == 4 || p == 128)
// {
// return true;
// }
// else
// {
// return false;
// }
//}
/// <summary>
/// Look up the port name for any given port number.
/// </summary>
/// <param name="port">The port number.</param>
/// <param name="proto">The protocol type. (TCP or UPD)</param>
/// <returns>The name of the port.</returns>
public static string GetServByPort(short port, ProtocolType proto)
{
StringBuilder ans = new StringBuilder();
switch (proto)
{
case ProtocolType.Tcp:
{
TcpServices tcps;
tcps = (TcpServices)port;
ans.Append(tcps);
ans.Append("(");
ans.Append(port);
ans.Append(")");
break;
}
case ProtocolType.Udp:
{
UdpServices udps;
udps = (UdpServices)port;
ans.Append(udps);
ans.Append("(");
ans.Append(port);
ans.Append(")");
break;
}
default:
{
ans.Append("(");
ans.Append(port);
ans.Append(")");
break;
}
}
return ans.ToString();
}
public static string DiscoverUnixDnsServerAddress()
{
if (System.IO.File.Exists("/etc/resolv.conf"))
{
using (System.IO.StreamReader sr = new System.IO.StreamReader(new System.IO.FileStream("/etc/resolv.conf", System.IO.FileMode.Open)))
{
while (!sr.EndOfStream)
{
string line = sr.ReadLine().TrimStart();
if (line.StartsWith("nameserver") && line.Length > 11)
{
line = line.Substring(10).Trim();
if (!string.IsNullOrEmpty(line))
{
sr.Dispose();
return line;
}
}
}
sr.Dispose();
}
}
return string.Empty;
}
public static IPAddressCollection DiscoverDnsServerAddresses()
{
NetworkInterface[] arrNetworkInterfaces = NetworkInterface.GetAllNetworkInterfaces();
foreach (NetworkInterface objNetworkInterface in arrNetworkInterfaces)
{
if (
(objNetworkInterface.OperationalStatus == OperationalStatus.Up) &&
(objNetworkInterface.Speed > 0) &&
(objNetworkInterface.NetworkInterfaceType != NetworkInterfaceType.Loopback) &&
(objNetworkInterface.NetworkInterfaceType != NetworkInterfaceType.Tunnel)
)
{
IPAddressCollection candidate = objNetworkInterface.GetIPProperties().DnsAddresses;
bool found = false;
foreach (IPAddress addr in candidate)
{
// Make this collection contains IPv4 addresses only
if (addr.AddressFamily == AddressFamily.InterNetwork)
found = true;
}
if (found)
return candidate;
}
}
return null;
}
//public static uint ByteToUInt(byte[] theByte)
//{
// uint l = 0;
// for (int i = 0; i < theByte.Length; i++)
// {
// l += (uint)theByte[(theByte.Length - i) - 1] << i * 8;
// }
// return l;
//}
// Use BitConverter.GetBytes()
//public static byte[] IntToByteArray(uint theInt)
//{
// byte[] byteArray = new byte[4];
// int i;
// int shift;
// for (i = 0, shift = 24; i < 4; i++, shift -= 8)
// byteArray[i] = (byte)(0xFF & (theInt >> shift));
// return byteArray;
//}
// use BitConverter.GetBytes()
//public static byte[] UshortToByteArray(ushort theShort)
//{
// byte[] byteArray = new byte[2];
// int i;
// int shift;
// for (i = 0, shift = 16; i < 2; i++, shift -= 8)
// byteArray[i] = (byte)(0xFF & (theShort >> shift));
// return byteArray;
//}
}
}

50
SMTPServer/SMTPServer/Logging/Logging.cs Normal file
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@ -0,0 +1,50 @@
using System;
namespace Logging
{
public class Logging
{
private static LoggingType[] _ActiveLoggingTypes { get; set; }
public enum LoggingType
{
TRACE,
ERROR,
DEBUG,
WARNING,
INFO,
ALL
}
private static void AddLogMessage(LoggingType messagetype, string message)
{
if(CheckLoggingType(messagetype)) PrintToConsole(messagetype, message);
}
private static bool CheckLoggingType(LoggingType lt){
if (_ActiveLoggingTypes.Length < 1) {
_ActiveLoggingTypes = new LoggingType[1];
_ActiveLoggingTypes[0] = LoggingType.ALL;
}
bool found = false;
foreach(LoggingType l in _ActiveLoggingTypes)
{
if (l == lt || l == LoggingType.ALL)
{
found = true;
break;
}
}
return found;
}
private static void PrintToConsole(LoggingType lt, string message)
{
Console.WriteLine("[" + lt.ToString() + "]" + message);
}
}
}

15
SMTPServer/SMTPServer/MailTransferAgent.cs
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@ -14,36 +14,41 @@ namespace SMTPServer
public static void StartMailTransferAgent() public static void StartMailTransferAgent()
{ {
_Thread = new Thread(new ThreadStart(MTA)); _Thread = new Thread(new ThreadStart(MTAAsync));
_Thread.Start(); _Thread.Start();
} }
public static void MTA() public static async void MTAAsync()
{ {
while (true) while (true)
{ {
try try
{ {
var mail = MailQueue.GetNextMail(); var mail = MailQueue.GetNextMail();
} catch (NoMailsInQueueException) { }
catch (NoMailsInQueueException)
{
Thread.Sleep(100); Thread.Sleep(100);
continue; continue;
} }
var charset = Encoding.UTF8; var charset = Encoding.UTF8;
var dnsname = GetDNSName(""); var dnsname = await GetDNSNameAsync("");
var client = new StartTcpConnection(25, new IPAddress(GetIpFromDNS(dnsname)), charset); var client = new StartTcpConnection(25, new IPAddress(GetIpFromDNS(dnsname)), charset);
if (!client.Connected) ; //ToDo Errorfall if (!client.Connected) ; //ToDo Errorfall
} }
} }
public static string GetDNSName(string mailTo) public static async System.Threading.Tasks.Task<string> GetDNSNameAsync(string mailTo)
{ {
var parts = mailTo.Split('@'); var parts = mailTo.Split('@');
var domain = parts[1]; var domain = parts[1];
var dns = await System.Net.Dns.GetHostEntryAsync(domain);
//dns.
return null; return null;
} }

24
SMTPServer/SMTPServer/SMTPServer.csproj
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@ -1,5 +1,8 @@
<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003"> <Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" /> <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" />
<PropertyGroup Label="Configuration">
<NoWarn>1701;1702;1705;1006</NoWarn>
</PropertyGroup>
<PropertyGroup> <PropertyGroup>
<OutputType>Exe</OutputType> <OutputType>Exe</OutputType>
<TargetFramework>netcoreapp1.0</TargetFramework> <TargetFramework>netcoreapp1.0</TargetFramework>
@ -9,9 +12,9 @@
<EmbeddedResource Include="**\*.resx" /> <EmbeddedResource Include="**\*.resx" />
</ItemGroup> </ItemGroup>
<ItemGroup> <ItemGroup>
<Compile Include="PortListener.cs" /> <PackageReference Include="Microsoft.NETCore">
</ItemGroup> <Version>5.0.2</Version>
<ItemGroup> </PackageReference>
<PackageReference Include="Microsoft.NETCore.App"> <PackageReference Include="Microsoft.NETCore.App">
<Version>1.1.0</Version> <Version>1.1.0</Version>
</PackageReference> </PackageReference>
@ -19,6 +22,21 @@
<Version>1.0.0-alpha-20161104-2</Version> <Version>1.0.0-alpha-20161104-2</Version>
<PrivateAssets>All</PrivateAssets> <PrivateAssets>All</PrivateAssets>
</PackageReference> </PackageReference>
<PackageReference Include="Microsoft.NETCore.Platforms">
<Version>1.1.0</Version>
</PackageReference>
<PackageReference Include="Microsoft.NETCore.Runtime">
<Version>1.0.2-rc2-24027</Version>
</PackageReference>
<PackageReference Include="Microsoft.NETCore.Targets">
<Version>1.1.0</Version>
</PackageReference>
<PackageReference Include="System.IO.FileSystem">
<Version>4.0.1</Version>
</PackageReference>
<PackageReference Include="System.Net.NameResolution">
<Version>4.3.0</Version>
</PackageReference>
</ItemGroup> </ItemGroup>
<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" /> <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
</Project> </Project>

8
SMTPServer/TCPListener.cs
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@ -1,8 +0,0 @@
using System;
public class Class1
{
public Class1()
{
}
}