public void パケット生成_A_NS()
{
//setUp
//exercise
//パケットの生成
const ushort id = 0x0005;
const bool qr = true; //応答
const bool rd = true; //再帰要求(有効)
const bool aa = false; //権限(なし)
const bool ra = true;
var sut = new PacketDns(id, qr, aa, rd, ra);
sut.AddRr(RrKind.QD, new RrQuery("www.google.com.", DnsType.Aaaa));
sut.AddRr(RrKind.NS, new RrNs("google.com.", 0xa7d, "ns3.google.com."));
sut.AddRr(RrKind.NS, new RrNs("google.com.", 0xa7d, "ns1.google.com."));
sut.AddRr(RrKind.NS, new RrNs("google.com.", 0xa7d, "ns4.google.com."));
sut.AddRr(RrKind.NS, new RrNs("google.com.", 0xa7d, "ns2.google.com."));
sut.AddRr(RrKind.AR, new RrA("ns1.google.com.", 0xb5e, new Ip("216.239.32.10")));
sut.AddRr(RrKind.AR, new RrA("ns2.google.com.", 0xbde, new Ip("216.239.34.10")));
sut.AddRr(RrKind.AR, new RrA("ns3.google.com.", 0xaf5, new Ip("216.239.36.10")));
sut.AddRr(RrKind.AR, new RrA("ns4.google.com.", 0xab3, new Ip("216.239.38.10")));
//生成したパケットのバイト配列で、再度パケットクラスを生成する
var p = new PacketDns(sut.GetBytes());
//verify
Assert.That(p.GetAa(), Is.EqualTo(false));
Assert.That(p.GetId(), Is.EqualTo((short) 0x0005));
Assert.That(p.GetDnsType(), Is.EqualTo(DnsType.Aaaa));
Assert.That(p.GetCount(RrKind.QD), Is.EqualTo(1));
Assert.That(p.GetCount(RrKind.AN), Is.EqualTo(0));
Assert.That(p.GetCount(RrKind.NS), Is.EqualTo(4));
Assert.That(p.GetCount(RrKind.AR), Is.EqualTo(4));
Assert.That(p.GetRcode(), Is.EqualTo((short) 0));
Assert.That(p.GetRr(RrKind.NS, 0).ToString(), Is.EqualTo(new RrNs("google.com.", 0xa7d, "ns3.google.com.").ToString()));
Assert.That(p.GetRr(RrKind.NS, 1).ToString(), Is.EqualTo(new RrNs("google.com.", 0xa7d, "ns1.google.com.").ToString()));
Assert.That(p.GetRr(RrKind.NS, 2).ToString(), Is.EqualTo(new RrNs("google.com.", 0xa7d, "ns4.google.com.").ToString()));
Assert.That(p.GetRr(RrKind.NS, 3).ToString(), Is.EqualTo(new RrNs("google.com.", 0xa7d, "ns2.google.com.").ToString()));
Assert.That(p.GetRr(RrKind.AR, 0).ToString(), Is.EqualTo(new RrA("ns1.google.com.", 0xb5e, new Ip("216.239.32.10")).ToString()));
Assert.That(p.GetRr(RrKind.AR, 1).ToString(), Is.EqualTo(new RrA("ns2.google.com.", 0xbde, new Ip("216.239.34.10")).ToString()));
Assert.That(p.GetRr(RrKind.AR, 2).ToString(), Is.EqualTo(new RrA("ns3.google.com.", 0xaf5, new Ip("216.239.36.10")).ToString()));
Assert.That(p.GetRr(RrKind.AR, 3).ToString(), Is.EqualTo(new RrA("ns4.google.com.", 0xab3, new Ip("216.239.38.10")).ToString()));
}
public void パケット生成_MX()
{
//setUp
//exercise
//パケットの生成
const ushort id = (ushort) 0xf00f;
const bool qr = true; //応答
const bool rd = false; //再帰要求(有効)
const bool aa = true; //権限(あり)
const bool ra = true;
var sut = new PacketDns(id, qr, aa, rd, ra);
sut.AddRr(RrKind.QD, new RrQuery("google.com.", DnsType.Mx));
sut.AddRr(RrKind.AN, new RrMx("google.com.", 0xa7d, 10, "smtp.google.com."));
sut.AddRr(RrKind.NS, new RrNs("google.com.", 0xa7d, "ns3.google.com."));
//生成したパケットのバイト配列で、再度パケットクラスを生成する
byte[] b = sut.GetBytes();
var p = new PacketDns(b);
//verify
Assert.That(p.GetAa(), Is.EqualTo(true));
Assert.That(p.GetId(), Is.EqualTo((ushort) 0xf00f));
Assert.That(p.GetDnsType(), Is.EqualTo(DnsType.Mx));
Assert.That(p.GetCount(RrKind.QD), Is.EqualTo(1));
Assert.That(p.GetCount(RrKind.AN), Is.EqualTo(1));
Assert.That(p.GetCount(RrKind.NS), Is.EqualTo(1));
Assert.That(p.GetCount(RrKind.AR), Is.EqualTo(0));
Assert.That(p.GetRcode(), Is.EqualTo((short) 0));
//DEBUG
//OneRr r = p.GetRr(RrKind.AN, 0);
Assert.That(p.GetRr(RrKind.AN, 0).ToString(), Is.EqualTo(new RrMx("google.com.", 0xa7d, 10, "smtp.google.com.").ToString()));
Assert.That(p.GetRr(RrKind.NS, 0).ToString(), Is.EqualTo(new RrNs("google.com.", 0xa7d, "ns3.google.com.").ToString()));
// Assert.That(p.GetRr(RrKind.NS, 1).ToString(), Is.EqualTo(new RrNs("google.com.", 0xa7d, "ns1.google.com.").ToString()));
// Assert.That(p.GetRr(RrKind.NS, 2).ToString(), Is.EqualTo(new RrNs("google.com.", 0xa7d, "ns4.google.com.").ToString()));
// Assert.That(p.GetRr(RrKind.NS, 3).ToString(), Is.EqualTo(new RrNs("google.com.", 0xa7d, "ns2.google.com.").ToString()));
//
// Assert.That(p.GetRr(RrKind.AR, 0).ToString(), Is.EqualTo(new RrA("ns1.google.com.", 0xb5e, new Ip("216.239.32.10")).ToString()));
// Assert.That(p.GetRr(RrKind.AR, 1).ToString(), Is.EqualTo(new RrA("ns2.google.com.", 0xbde, new Ip("216.239.34.10")).ToString()));
// Assert.That(p.GetRr(RrKind.AR, 2).ToString(), Is.EqualTo(new RrA("ns3.google.com.", 0xaf5, new Ip("216.239.36.10")).ToString()));
// Assert.That(p.GetRr(RrKind.AR, 3).ToString(), Is.EqualTo(new RrA("ns4.google.com.", 0xab3, new Ip("216.239.38.10")).ToString()));
}
public void パケット解釈_str2()
{
//exercise
var sut = new PacketDns(TestUtil.HexStream2Bytes(Str2));
//verify
Assert.That(sut.GetId(), Is.EqualTo((short) 0x0004));
Assert.That(sut.GetCount(RrKind.QD), Is.EqualTo(1));
Assert.That(sut.GetCount(RrKind.AN), Is.EqualTo(1));
Assert.That(sut.GetCount(RrKind.NS), Is.EqualTo(2));
Assert.That(sut.GetCount(RrKind.AR), Is.EqualTo(2));
Assert.That(sut.GetRcode(), Is.EqualTo((short) 0));
Assert.That(sut.GetAa(), Is.EqualTo(false));
Assert.That(sut.GetRd(), Is.EqualTo(true));
Assert.That(sut.GetDnsType(), Is.EqualTo(DnsType.Soa));
Assert.That(sut.GetRequestName(), Is.EqualTo("nifty.com."));
Assert.That(sut.GetRr(RrKind.QD, 0).ToString(), Is.EqualTo((new RrQuery("nifty.com.", DnsType.Soa)).ToString()));
Assert.That(sut.GetRr(RrKind.AN, 0).ToString(), Is.EqualTo((new RrSoa("nifty.com.", 0x616, "ons0.nifty.ad.jp", "hostmaster.nifty.ad.jp", 0x0bfe4128, 0xe10, 0x384, 0x36ee80, 0x384)).ToString()));
Assert.That(sut.GetRr(RrKind.NS, 0).ToString(), Is.EqualTo((new RrNs("nifty.com.", 0x6d2, "ons0.nifty.ad.jp.")).ToString()));
Assert.That(sut.GetRr(RrKind.NS, 1).ToString(), Is.EqualTo((new RrNs("nifty.com.", 0x6d2, "ons1.nifty.ad.jp.")).ToString()));
Assert.That(sut.GetRr(RrKind.AR, 0).ToString(), Is.EqualTo((new RrA("ons0.nifty.ad.jp.", 0x712, new Ip("202.248.37.77"))).ToString()));
Assert.That(sut.GetRr(RrKind.AR, 1).ToString(), Is.EqualTo((new RrA("ons1.nifty.ad.jp.", 0x6da, new Ip("202.248.20.156"))).ToString()));
}
public void パケット解釈_str1()
{
//exercise
var sut = new PacketDns(TestUtil.HexStream2Bytes(Str1));
//verify
Assert.That(sut.GetId(), Is.EqualTo((short) 0x0002));
Assert.That(sut.GetCount(RrKind.QD), Is.EqualTo(1));
Assert.That(sut.GetCount(RrKind.AN), Is.EqualTo(5));
Assert.That(sut.GetCount(RrKind.NS), Is.EqualTo(4));
Assert.That(sut.GetCount(RrKind.AR), Is.EqualTo(7));
Assert.That(sut.GetRcode(), Is.EqualTo((short) 0));
Assert.That(sut.GetAa(), Is.EqualTo(false));
Assert.That(sut.GetRd(), Is.EqualTo(true));
Assert.That(sut.GetDnsType(), Is.EqualTo(DnsType.Mx));
Assert.That(sut.GetRequestName(), Is.EqualTo("gmail.com."));
Assert.That(sut.GetRr(RrKind.QD, 0).ToString(), Is.EqualTo((new RrQuery("gmail.com.", DnsType.Mx)).ToString()));
Assert.That(sut.GetRr(RrKind.AN, 0).ToString(), Is.EqualTo((new RrMx("gmail.com.", 3427, 10, "alt1.gmail-smtp-in.l.google.com.")).ToString()));
Assert.That(sut.GetRr(RrKind.AN, 1).ToString(), Is.EqualTo((new RrMx("gmail.com.", 3427, 20, "alt2.gmail-smtp-in.l.google.com.")).ToString()));
Assert.That(sut.GetRr(RrKind.AN, 2).ToString(), Is.EqualTo((new RrMx("gmail.com.", 3427, 30, "alt3.gmail-smtp-in.l.google.com.")).ToString()));
Assert.That(sut.GetRr(RrKind.AN, 3).ToString(), Is.EqualTo((new RrMx("gmail.com.", 3427, 40, "alt4.gmail-smtp-in.l.google.com.")).ToString()));
Assert.That(sut.GetRr(RrKind.AN, 4).ToString(), Is.EqualTo((new RrMx("gmail.com.", 3427, 5, "gmail-smtp-in.l.google.com.")).ToString()));
Assert.That(sut.GetRr(RrKind.NS, 0).ToString(), Is.EqualTo((new RrNs("gmail.com.", 54413, "ns4.google.com.")).ToString()));
Assert.That(sut.GetRr(RrKind.NS, 1).ToString(), Is.EqualTo((new RrNs("gmail.com.", 54413, "ns2.google.com.")).ToString()));
Assert.That(sut.GetRr(RrKind.NS, 2).ToString(), Is.EqualTo((new RrNs("gmail.com.", 54413, "ns1.google.com.")).ToString()));
Assert.That(sut.GetRr(RrKind.NS, 3).ToString(), Is.EqualTo((new RrNs("gmail.com.", 54413, "ns3.google.com.")).ToString()));
Assert.That(sut.GetRr(RrKind.AR, 0).ToString(), Is.EqualTo((new RrA("gmail-smtp-in.l.google.com.", 295, new Ip("74.125.25.27"))).ToString()));
Assert.That(sut.GetRr(RrKind.AR, 1).ToString(), Is.EqualTo((new RrA("alt2.gmail-smtp-in.l.google.com.", 60, new Ip("74.125.140.27"))).ToString()));
Assert.That(sut.GetRr(RrKind.AR, 2).ToString(), Is.EqualTo((new RrA("alt4.gmail-smtp-in.l.google.com.", 149, new Ip("74.125.131.27"))).ToString()));
Assert.That(sut.GetRr(RrKind.AR, 3).ToString(), Is.EqualTo((new RrA("ns1.google.com.", 54584, new Ip("216.239.32.10"))).ToString()));
Assert.That(sut.GetRr(RrKind.AR, 4).ToString(), Is.EqualTo((new RrA("ns2.google.com.", 54578, new Ip("216.239.34.10"))).ToString()));
Assert.That(sut.GetRr(RrKind.AR, 5).ToString(), Is.EqualTo((new RrA("ns3.google.com.", 54641, new Ip("216.239.36.10"))).ToString()));
Assert.That(sut.GetRr(RrKind.AR, 6).ToString(), Is.EqualTo((new RrA("ns4.google.com.", 54520, new Ip("216.239.38.10"))).ToString()));
}
public void パケット解釈_str0()
{
//exercise
var sut = new PacketDns(TestUtil.HexStream2Bytes(Str0));
//verify
Assert.That(sut.GetId(), Is.EqualTo((short) 0x0003));
Assert.That(sut.GetCount(RrKind.QD), Is.EqualTo(1));
Assert.That(sut.GetCount(RrKind.AN), Is.EqualTo(0));
Assert.That(sut.GetCount(RrKind.NS), Is.EqualTo(4));
Assert.That(sut.GetCount(RrKind.AR), Is.EqualTo(4));
Assert.That(sut.GetRcode(), Is.EqualTo((short) 0));
Assert.That(sut.GetAa(), Is.EqualTo(false));
Assert.That(sut.GetRd(), Is.EqualTo(true));
Assert.That(sut.GetDnsType(), Is.EqualTo(DnsType.Aaaa));
Assert.That(sut.GetRequestName(), Is.EqualTo("www.google.com."));
Assert.That(sut.GetRr(RrKind.QD, 0).ToString(), Is.EqualTo((new RrQuery("www.google.com.", DnsType.Aaaa)).ToString()));
Assert.That(sut.GetRr(RrKind.NS, 0).ToString(), Is.EqualTo((new RrNs("google.com.", 83400, "ns4.google.com.")).ToString()));
Assert.That(sut.GetRr(RrKind.NS, 1).ToString(), Is.EqualTo((new RrNs("google.com.", 83400, "ns2.google.com.")).ToString()));
Assert.That(sut.GetRr(RrKind.NS, 2).ToString(), Is.EqualTo((new RrNs("google.com.", 83400, "ns3.google.com.")).ToString()));
Assert.That(sut.GetRr(RrKind.NS, 3).ToString(), Is.EqualTo((new RrNs("google.com.", 83400, "ns1.google.com.")).ToString()));
Assert.That(sut.GetRr(RrKind.AR, 0).ToString(), Is.EqualTo((new RrA("ns1.google.com.", 83465, new Ip("216.239.32.10"))).ToString()));
Assert.That(sut.GetRr(RrKind.AR, 1).ToString(), Is.EqualTo((new RrA("ns2.google.com.", 83563, new Ip("216.239.34.10"))).ToString()));
Assert.That(sut.GetRr(RrKind.AR, 2).ToString(), Is.EqualTo((new RrA("ns3.google.com.", 83465, new Ip("216.239.36.10"))).ToString()));
Assert.That(sut.GetRr(RrKind.AR, 3).ToString(), Is.EqualTo((new RrA("ns4.google.com.", 83465, new Ip("216.239.38.10"))).ToString()));
}
//addrは通常オーダで指定されている
//private PacketDns Lookup(Ip ip, string requestName, DNS_TYPE dnsType,RemoteInfo remoteInfo) {
private PacketDns Lookup(Ip ip, string requestName, DnsType dnsType, Ip remoteAddr)
{
//Ip ip = new Ip(addr);
Logger.Set(LogKind.Detail, null, 17, string.Format("{0} Server={1} Type={2}", requestName, ip, dnsType));
//"Lookup"
//受信タイムアウト
const int timeout = 3;
// var random = new Random(Environment.TickCount);
// var id = (ushort) random.Next(0xFFFF);//識別子をランダムに決定する
var random = new Random();
var id = (ushort) random.Next(0xFFFF);
const bool qr = false; //要求
const bool aa = false; //権威なし
var rd = (bool) Conf.Get("useRD"); //再帰要求を使用するかどうか
const bool ra = false; //再帰無効
//リクエストパケットの生成
var sp = new PacketDns(id, qr, aa, rd, ra);
AppendRr(sp, RrKind.QD, new RrQuery(requestName, dnsType)); //QR(質問)フィールド追加
const int port = 53;
//SockUdp sockUdp = new UdpObj(Kernel, getLogger(), ip, port);
byte[] sendBuf = sp.GetBytes();
var sockUdp = new SockUdp(_kernel, ip, port, null, sendBuf); //送信
//この辺のロジックを動作確認する必要がある
byte[] recvBuf = sockUdp.Recv(timeout);
if (recvBuf != null && 12 <= recvBuf.Length) {
//受信
try {
var rp = new PacketDns(recvBuf);
var str = string.Format("{0} count[{1},{2},{3},{4}] rcode={5} AA={6}", requestName,
rp.GetCount(RrKind.QD), rp.GetCount(RrKind.AN), rp.GetCount(RrKind.NS), rp.GetCount(RrKind.AR),
rp.GetRcode(), rp.GetAa());
Logger.Set(LogKind.Detail, sockUdp, 18, str); //"Lookup"
//質問フィールの以外のリソースデータをキャッシュする
//for (int rr = 1; rr < 4; rr++) {
foreach (RrKind rr in Enum.GetValues(typeof (RrKind))) {
if (rr == RrKind.QD) {
continue; //質問フィールの以外のリソースデータをキャッシュする
}
var m = rp.GetCount(rr);
for (var n = 0; n < m; n++) {
var oneRr = rp.GetRr(rr, n);
_rootCache.Add(oneRr);
Logger.Set(LogKind.Detail, sockUdp, 24,
string.Format("{0} _rootCache.Count={1}", oneRr, _rootCache.Count)); //_rootCache.Add
}
}
return rp;
}
catch (IOException) {
//ここでのエラーログも必要？
return null;
}
}
Logger.Set(LogKind.Error, sockUdp, 5,
string.Format("addr={0} requestName={1} dnsType={2}", remoteAddr, requestName, dnsType));
//Lookup() パケット受信でタイムアウトが発生しました。
return null;
}
//addrは通常オーダで指定されている
//private PacketDns Lookup(Ip ip, string requestName, DNS_TYPE dnsType,RemoteInfo remoteInfo) {
private PacketDns Lookup(Ip ip, string requestName, DnsType dnsType, Ip remoteAddr)
{
//Ip ip = new Ip(addr);
Logger.Set(LogKind.Detail, null, 17, string.Format("{0} Server={1} Type={2}", requestName, ip, dnsType));
//"Lookup"
//受信タイムアウト
const int timeout = 3;
// var random = new Random(Environment.TickCount);
// var id = (ushort) random.Next(0xFFFF);//識別子をランダムに決定する
var random = new Random();
var id = (ushort)random.Next(0xFFFF);
const bool qr = false; //要求
const bool aa = false; //権威なし
var rd = (bool)Conf.Get("useRD"); //再帰要求を使用するかどうか
const bool ra = false; //再帰無効
//リクエストパケットの生成
var sp = new PacketDns(id, qr, aa, rd, ra);
AppendRr(sp, RrKind.QD, new RrQuery(requestName, dnsType)); //QR(質問)フィールド追加
const int port = 53;
//SockUdp sockUdp = new UdpObj(Kernel, getLogger(), ip, port);
byte[] sendBuf = sp.GetBytes();
var sockUdp = new SockUdp(_kernel, ip, port, null, sendBuf); //送信
//この辺のロジックを動作確認する必要がある
byte[] recvBuf = sockUdp.Recv(timeout);
if (recvBuf != null && 12 <= recvBuf.Length)
{
//受信
try {
var rp = new PacketDns(recvBuf);
var str = string.Format("{0} count[{1},{2},{3},{4}] rcode={5} AA={6}", requestName,
rp.GetCount(RrKind.QD), rp.GetCount(RrKind.AN), rp.GetCount(RrKind.NS), rp.GetCount(RrKind.AR),
rp.GetRcode(), rp.GetAa());
Logger.Set(LogKind.Detail, sockUdp, 18, str); //"Lookup"
//質問フィールの以外のリソースデータをキャッシュする
//for (int rr = 1; rr < 4; rr++) {
foreach (RrKind rr in Enum.GetValues(typeof(RrKind)))
{
if (rr == RrKind.QD)
{
continue; //質問フィールの以外のリソースデータをキャッシュする
}
var m = rp.GetCount(rr);
for (var n = 0; n < m; n++)
{
var oneRr = rp.GetRr(rr, n);
_rootCache.Add(oneRr);
Logger.Set(LogKind.Detail, sockUdp, 24,
string.Format("{0} _rootCache.Count={1}", oneRr, _rootCache.Count)); //_rootCache.Add
}
}
return(rp);
}
catch (IOException) {
//ここでのエラーログも必要？
return(null);
}
}
Logger.Set(LogKind.Error, sockUdp, 5,
string.Format("addr={0} requestName={1} dnsType={2}", remoteAddr, requestName, dnsType));
//Lookup() パケット受信でタイムアウトが発生しました。
return(null);
}
