71 lines
2.0 KiB
C#
71 lines
2.0 KiB
C#
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using DnsClient;
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Text;
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namespace SMTPServer
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{
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public class GetDNSEntries
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{
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public static async System.Threading.Tasks.Task<string[]> GetMXRecordAsync(string domain) => await GetMXRecordAsync(domain, 0);
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public static async System.Threading.Tasks.Task<string[]> GetMXRecordAsync(string domain, int nr)
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{
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var lookup = new LookupClient();
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var result = await lookup.QueryAsync(domain, QueryType.MX);
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var records = result.AllRecords.ToArray();
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//ToDo priority sorting
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var rec = new string[records.Length];
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for(int i = 0; i < records.Length; i++)
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{
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var str = records[i].RecordToString();
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var s = str.Split(' ');
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if (s.Length == 1)
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{
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rec[i] = s[0];
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} else if (s.Length == 2)
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{
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rec[i] = s[1];
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} else
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{
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rec[i] = null;
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}
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}
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return rec;
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/*
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foreach (var r in result.AllRecords)
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{
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Console.WriteLine(r.RecordToString());
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}*/
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}
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public static async System.Threading.Tasks.Task<string[]> GetIPAddressFromDnsArrayAsync(string[] dnsnames)
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{
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var ips = new string[dnsnames.Length];
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for(int i = 0; i < dnsnames.Length; i++)
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{
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ips[i] = await GetIpFromDnsNameAsync(dnsnames[i]);
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}
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return ips;
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}
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public static async System.Threading.Tasks.Task<string> GetIpFromDnsNameAsync(string dnsname)
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{
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var lookup = new LookupClient();
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var result = await lookup.QueryAsync(dnsname, QueryType.A);
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var records = result.AllRecords.ToArray();
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if (records.Length < 1) return null;
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return records[0].RecordToString();
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}
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}
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}
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