51 lines
1.4 KiB
C#
51 lines
1.4 KiB
C#
//
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// Mono.Net.Dns.DnsQuery
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//
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// Authors:
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// Gonzalo Paniagua Javier (gonzalo.mono@gmail.com)
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//
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// Copyright 2011 Gonzalo Paniagua Javier
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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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.Text;
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namespace Mono.Net.Dns {
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class DnsQuery : DnsPacket {
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public DnsQuery (string name, DnsQType qtype, DnsQClass qclass)
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{
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if (String.IsNullOrEmpty (name))
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throw new ArgumentNullException ("name");
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int length = DnsUtil.GetEncodedLength (name);
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if (length == -1)
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throw new ArgumentException ("Invalid DNS name", "name");
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length += 12 + 2 + 2; // Header + qtype + qclass
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packet = new byte [length];
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header = new DnsHeader (packet, 0);
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position = 12;
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WriteDnsName (name);
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WriteUInt16 ((ushort) qtype);
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WriteUInt16 ((ushort) qclass);
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Header.QuestionCount = 1;
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Header.IsQuery = true;
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Header.RecursionDesired = true;
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}
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}
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}
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