SRV.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Text.RegularExpressions;
using Waher.Networking.DNS.Communication;
using Waher.Networking.DNS.Enumerations;
using Waher.Persistence.Attributes;
 
namespace Waher.Networking.DNS.ResourceRecords
{
    public class SRV : ResourceRecord
    {
        private static readonly Regex srvName = new Regex("^_(?'Service'[^.]*)[.]_(?'Protocol'[^.]*)[.](?'Name'.*)$", RegexOptions.Singleline | RegexOptions.Compiled);
 
        private string service;
        private string protocol;
        private ushort priority;
        private ushort weight;
        private ushort port;
        private string targetHost;
 
        public SRV()
            : base()
        {
            this.service = string.Empty;
            this.protocol = string.Empty;
            this.priority = 0;
            this.weight = 0;
            this.port = 0;
            this.targetHost = string.Empty;
        }
 
        public SRV(string Name, TYPE Type, CLASS Class, uint Ttl, Stream Data)
            : base(Name, Type, Class, Ttl)
        {
            Match M;
 
            lock (srvName)
            {
                M = srvName.Match(Name);
            }
 
            if (!M.Success || M.Index > 0 || M.Length < Name.Length)
                throw new ArgumentException("Invalid service name.", nameof(Name));
 
            this.service = M.Groups["Service"].Value;
            this.protocol = M.Groups["Protocol"].Value;
            this.Name = M.Groups["Name"].Value;
 
            this.priority = DnsClient.ReadUInt16(Data);
            this.weight = DnsClient.ReadUInt16(Data);
            this.port = DnsClient.ReadUInt16(Data);
            this.targetHost = DnsClient.ReadName(Data);
        }
 
        [DefaultValueStringEmpty]
        public string Service
        {
            get => this.service;
            set => this.service = value;
        }
 
        [DefaultValueStringEmpty]
        public string Protocol
        {
            get => this.protocol;
            set => this.protocol = value;
        }
 
        [DefaultValue((ushort)0)]
        public ushort Priority
        {
            get => this.priority;
            set => this.priority = value;
        }
 
        [DefaultValue((ushort)0)]
        public ushort Weight
        {
            get => this.weight;
            set => this.weight = value;
        }
 
        [DefaultValue((ushort)0)]
        public ushort Port
        {
            get => this.port;
            set => this.port = value;
        }
 
        [DefaultValueStringEmpty]
        public string TargetHost
        {
            get => this.targetHost;
            set => this.targetHost = value;
        }
 
        public override string ToString()
        {
            return base.ToString() + "\t" + this.service + "\t" + this.protocol +
                "\t" + this.priority.ToString() + "\t" + this.weight.ToString() +
                "\t" + this.port.ToString() + "\t" + this.targetHost;
        }
    }
}