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* Added RFC 7830 * Added RFC 7871 * Added RFC 7873 * Added RFC 8005 * Added RFC 8162 * Added RFC 8749 * Added RFC 8777 * Added RFC 9373 * Added draft-ietf-dnsop-svcb-https * Fixed dynamic updates (#28) * Optimized parsing of Zone masterfiles * Updated BouncyCastle to latest version
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,261 @@ | ||
| #region Copyright and License | ||
| // Copyright 2010..2023 Alexander Reinert | ||
| // | ||
| // This file is part of the ARSoft.Tools.Net - C# DNS client/server and SPF Library (https://github.com/alexreinert/ARSoft.Tools.Net) | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
| #endregion | ||
|
|
||
| using System.Net; | ||
| using System.Net.Sockets; | ||
|
|
||
| namespace ARSoft.Tools.Net.Dns; | ||
|
|
||
| /// <summary> | ||
| /// <para>Automatic Multicast Tunneling Relay</para> | ||
| /// <para> | ||
| /// Defined in | ||
| /// <a href="https://www.rfc-editor.org/rfc/rfc8777.html">RFC 8777</a>. | ||
| /// </para> | ||
| /// </summary> | ||
| // ReSharper disable once InconsistentNaming | ||
| public class AMTRelayRecord : DnsRecordBase | ||
| { | ||
| public enum RelayFieldType : byte | ||
| { | ||
| /// <summary> | ||
| /// <para>The relay field is empty.</para> | ||
| /// <para> | ||
| /// Defined in | ||
| /// <a href="https://www.rfc-editor.org/rfc/rfc8777.html">RFC 8777</a>. | ||
| /// </para> | ||
| /// </summary> | ||
| None = 0, | ||
|
|
||
| /// <summary> | ||
| /// <para>The relay field contains an IPv4 address.</para> | ||
| /// <para> | ||
| /// Defined in | ||
| /// <a href="https://www.rfc-editor.org/rfc/rfc8777.html">RFC 8777</a>. | ||
| /// </para> | ||
| /// </summary> | ||
| // ReSharper disable once InconsistentNaming | ||
| IPv4 = 1, | ||
|
|
||
| /// <summary> | ||
| /// <para>The relay field contains an IPv6 address.</para> | ||
| /// <para> | ||
| /// Defined in | ||
| /// <a href="https://www.rfc-editor.org/rfc/rfc8777.html">RFC 8777</a>. | ||
| /// </para> | ||
| /// </summary> | ||
| // ReSharper disable once InconsistentNaming | ||
| IPv6 = 2, | ||
|
|
||
| /// <summary> | ||
| /// <para>The relay field contains a domain name.</para> | ||
| /// <para> | ||
| /// Defined in | ||
| /// <a href="https://www.rfc-editor.org/rfc/rfc8777.html">RFC 8777</a>. | ||
| /// </para> | ||
| /// </summary> | ||
| DomainName = 3, | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// The precedence of the record | ||
| /// </summary> | ||
| public byte Precedence { get; } | ||
|
|
||
| /// <summary> | ||
| /// The Discovery Optional flag | ||
| /// </summary> | ||
| public bool IsDiscoveryOptional { get; } | ||
|
|
||
| /// <summary> | ||
| /// The type of the relay | ||
| /// </summary> | ||
| public RelayFieldType RelayType { get; } | ||
|
|
||
| /// <summary> | ||
| /// The relay | ||
| /// </summary> | ||
| public string Relay { get; } | ||
|
|
||
| internal AMTRelayRecord(DomainName name, RecordType recordType, RecordClass recordClass, int timeToLive, IList<byte> resultData, int currentPosition, int length) | ||
| : base(name, recordType, recordClass, timeToLive) | ||
| { | ||
| Precedence = resultData[currentPosition++]; | ||
| var type = resultData[currentPosition++]; | ||
| IsDiscoveryOptional = type > 127; | ||
| RelayType = (RelayFieldType) (type & 127); | ||
| switch (RelayType) | ||
| { | ||
| case RelayFieldType.IPv4: | ||
| Relay = new IPAddress(DnsMessageBase.ParseByteData(resultData, ref currentPosition, 4)).ToString(); | ||
| break; | ||
| case RelayFieldType.IPv6: | ||
| Relay = new IPAddress(DnsMessageBase.ParseByteData(resultData, ref currentPosition, 16)).ToString(); | ||
| break; | ||
| case RelayFieldType.DomainName: | ||
| Relay = DnsMessageBase.ParseDomainName(resultData, ref currentPosition).ToString(true); | ||
| break; | ||
| default: | ||
| Relay = DomainName.Root.ToString(true); | ||
| break; | ||
| } | ||
| } | ||
|
|
||
| internal AMTRelayRecord(DomainName name, RecordType recordType, RecordClass recordClass, int timeToLive, DomainName origin, string[] stringRepresentation) | ||
| : base(name, recordType, recordClass, timeToLive) | ||
| { | ||
| if (stringRepresentation.Length != 4) | ||
| throw new FormatException(); | ||
|
|
||
| Precedence = Byte.Parse(stringRepresentation[0]); | ||
| switch (stringRepresentation[1]) | ||
| { | ||
| case "0": | ||
| IsDiscoveryOptional = false; | ||
| break; | ||
| case "1": | ||
| IsDiscoveryOptional = true; | ||
| break; | ||
| default: | ||
| throw new FormatException(); | ||
| } | ||
|
|
||
| RelayType = (RelayFieldType) Byte.Parse(stringRepresentation[2]); | ||
| switch (RelayType) | ||
| { | ||
| case RelayFieldType.IPv4: | ||
| { | ||
| if (IPAddress.TryParse(stringRepresentation[3], out var address) && address.AddressFamily == AddressFamily.InterNetwork) | ||
| { | ||
| Relay = address.ToString(); | ||
| } | ||
| else | ||
| { | ||
| throw new FormatException(); | ||
| } | ||
|
|
||
| break; | ||
| } | ||
| case RelayFieldType.IPv6: | ||
| { | ||
| if (IPAddress.TryParse(stringRepresentation[3], out var address) && address.AddressFamily == AddressFamily.InterNetworkV6) | ||
| { | ||
| Relay = address.ToString(); | ||
| } | ||
| else | ||
| { | ||
| throw new FormatException(); | ||
| } | ||
|
|
||
| break; | ||
| } | ||
| case RelayFieldType.DomainName: | ||
| Relay = ParseDomainName(origin, stringRepresentation[3]).ToString(true); | ||
| break; | ||
| default: | ||
| Relay = DomainName.Root.ToString(true); | ||
| break; | ||
| } | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Creates a new instance of the AMTRelayRecord class | ||
| /// </summary> | ||
| /// <param name="name"> Name of the zone </param> | ||
| /// <param name="timeToLive"> Seconds the record should be cached at most </param> | ||
| /// <param name="precedence">The precedence of the record</param> | ||
| public AMTRelayRecord(DomainName name, int timeToLive, byte precedence) | ||
| : base(name, RecordType.AMTRelay, RecordClass.INet, timeToLive) | ||
| { | ||
| Precedence = precedence; | ||
| IsDiscoveryOptional = false; | ||
| RelayType = RelayFieldType.None; | ||
| Relay = DomainName.Root.ToString(true); | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Creates a new instance of the AMTRelayRecord class | ||
| /// </summary> | ||
| /// <param name="name"> Name of the zone </param> | ||
| /// <param name="timeToLive"> Seconds the record should be cached at most </param> | ||
| /// <param name="precedence">The precedence of the record</param> | ||
| /// <param name="isDiscoveryOptional">The Discovery Optional flag</param> | ||
| /// <param name="relayAddress">The address of the relay</param> | ||
| public AMTRelayRecord(DomainName name, int timeToLive, byte precedence, bool isDiscoveryOptional, IPAddress relayAddress) | ||
| : base(name, RecordType.AMTRelay, RecordClass.INet, timeToLive) | ||
| { | ||
| Precedence = precedence; | ||
| IsDiscoveryOptional = isDiscoveryOptional; | ||
| RelayType = relayAddress.AddressFamily == AddressFamily.InterNetwork ? RelayFieldType.IPv4 : RelayFieldType.IPv6; | ||
| Relay = relayAddress.ToString(); | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Creates a new instance of the AMTRelayRecord class | ||
| /// </summary> | ||
| /// <param name="name"> Name of the zone </param> | ||
| /// <param name="timeToLive"> Seconds the record should be cached at most </param> | ||
| /// <param name="precedence">The precedence of the record</param> | ||
| /// <param name="isDiscoveryOptional">The Discovery Optional flag</param> | ||
| /// <param name="relayName">The domain name of the relay</param> | ||
| public AMTRelayRecord(DomainName name, int timeToLive, byte precedence, bool isDiscoveryOptional, DomainName relayName) | ||
| : base(name, RecordType.AMTRelay, RecordClass.INet, timeToLive) | ||
| { | ||
| Precedence = precedence; | ||
| IsDiscoveryOptional = isDiscoveryOptional; | ||
| RelayType = RelayFieldType.DomainName; | ||
| Relay = relayName.ToString(true); | ||
| } | ||
|
|
||
| internal override string RecordDataToString() | ||
| { | ||
| return Precedence + " " + (IsDiscoveryOptional ? "1" : "0") + " " + (byte) RelayType + " " + Relay; | ||
| } | ||
|
|
||
| protected internal override int MaximumRecordDataLength | ||
| { | ||
| get | ||
| { | ||
| var res = 2; | ||
| return RelayType switch | ||
| { | ||
| RelayFieldType.IPv4 => res + 4, | ||
| RelayFieldType.IPv6 => res + 16, | ||
| RelayFieldType.DomainName => res + 2 + Relay.Length, | ||
| _ => res | ||
| }; | ||
| } | ||
| } | ||
|
|
||
| protected internal override void EncodeRecordData(IList<byte> messageData, ref int currentPosition, Dictionary<DomainName, ushort>? domainNames, bool useCanonical) | ||
| { | ||
| messageData[currentPosition++] = Precedence; | ||
| messageData[currentPosition++] = (byte) ((byte) RelayType | (IsDiscoveryOptional ? 128 : 0)); | ||
| switch (RelayType) | ||
| { | ||
| case RelayFieldType.IPv4: | ||
| case RelayFieldType.IPv6: | ||
| byte[] addressBuffer = IPAddress.Parse(Relay).GetAddressBytes(); | ||
| DnsMessageBase.EncodeByteArray(messageData, ref currentPosition, addressBuffer); | ||
| break; | ||
| case RelayFieldType.DomainName: | ||
| DnsMessageBase.EncodeDomainName(messageData, ref currentPosition, ParseDomainName(DomainName.Root, Relay), null, false); | ||
| break; | ||
| } | ||
| } | ||
| } |
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