112 lines
2.6 KiB
C#
112 lines
2.6 KiB
C#
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//
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// Mono.Net.Dns.DnsResourceRecord
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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 DnsResourceRecord {
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string name;
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DnsType type;
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DnsClass klass;
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int ttl;
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ushort rdlength;
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ArraySegment<byte> m_rdata;
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internal DnsResourceRecord() {
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}
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internal void CopyFrom(DnsResourceRecord rr) {
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name = rr.name;
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type = rr.type;
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klass = rr.klass;
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ttl = rr.ttl;
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rdlength = rr.rdlength;
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m_rdata = rr.m_rdata;
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}
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static internal DnsResourceRecord CreateFromBuffer(DnsPacket packet, int size, ref int offset) {
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string pname = packet.ReadName(ref offset);
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DnsType ptype = (DnsType)packet.ReadUInt16(ref offset);
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DnsClass pclass = (DnsClass)packet.ReadUInt16(ref offset);
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int pttl = packet.ReadInt32(ref offset);
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ushort prdlength = packet.ReadUInt16(ref offset);
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DnsResourceRecord rr = new DnsResourceRecord();
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rr.name = pname;
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rr.type = ptype;
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rr.klass = pclass;
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rr.ttl = pttl;
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rr.rdlength = prdlength;
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rr.m_rdata = new ArraySegment<byte>(packet.Packet, offset, prdlength);
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offset += prdlength;
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switch(pclass) {
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case DnsClass.IN:
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switch(ptype) {
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case DnsType.A:
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rr = new DnsResourceRecordA(rr);
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break;
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case DnsType.AAAA:
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rr = new DnsResourceRecordAAAA(rr);
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break;
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case DnsType.CNAME:
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rr = new DnsResourceRecordCName(rr);
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break;
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case DnsType.PTR:
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rr = new DnsResourceRecordPTR(rr);
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break;
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default:
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break;
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}
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break;
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default:
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break;
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}
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return rr;
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}
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public string Name {
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get { return name; }
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}
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public DnsType Type {
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get { return type; }
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}
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public DnsClass Class {
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get { return klass; }
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}
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public int Ttl {
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get { return ttl; }
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}
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public ArraySegment<byte> Data {
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get { return m_rdata; }
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}
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public override string ToString() {
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return String.Format("Name: {0}, Type: {1}, Class: {2}, Ttl: {3}, Data length: {4}", name, type, klass, ttl, Data.Count);
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}
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}
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}
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