ARSoft.Tools.Net: Xamarin.Mac/iOSで動かしてみる

Socket is already connected

        public void AssertGoogle(DnsMessage msg)
        {
            Assert.IsNotNull (msg);
            Assert.IsTrue (msg.AnswerRecords.Count > 0);
            Assert.AreEqual( 
                173,
                (msg.AnswerRecords[0] as ARecord).Address.GetAddressBytes()[0]
            );
        }

        [Test]
        public void TestResolve ()
        {
            AssertGoogle (
                DnsClient.Default.Resolve (
                    "google.com", RecordType.A)
            );
        }

結果が返らない。ブレークポイント入れるとSocket is already connectedで例外起きている。

ので、DnsClientBase.csを修正:

private byte[] QueryByUdp(DnsClientEndpointInfo endpointInfo, byte[] messageData, int messageLength, out IPAddress responderAddress)
{
  ....
                    if( udpClient.Connected )
                        udpClient.Send(messageData);
                    else 
                        udpClient.SendTo(messageData, messageLength, SocketFlags.None, serverEndpoint);

BeginResolve でも同じ

        [Test]
        public void TestResolveAsync()
        {
            DnsClient.Default.BeginResolve (
                "google.com", 
                ar => {
                    AssertGoogle (
                        DnsClient.Default.EndSendMessage (ar)
                    );
                }, null);
        }

で結果がかえらないので、同様に修正:

        private void UdpBeginSend<TMessage>(DnsClientAsyncState<TMessage> state)
            where TMessage : DnsMessageBase, new()
        {
                 ....
                IAsyncResult asyncResult;
                if( state.UdpClient.Connected == true){
                    asyncResult = state.UdpClient.BeginSend(
                        state.QueryData, 0, state.QueryLength, 
                        SocketFlags.None,  UdpSendCompleted<TMessage>, state);
                }else {
                    asyncResult = state.UdpClient.BeginSendTo(
                        state.QueryData, 0, state.QueryLength, 
                        SocketFlags.None, state.UdpEndpoint, UdpSendCompleted<TMessage>, state);
                }

NSサーバー指定してAレコードのクエリ

        public List<System.Net.IPAddress>   ResolveAddress(
            DnsClient dns, string name, int timeout=50000 )
        {
            var msg = dns.Resolve (name);

            var addrs = msg.AnswerRecords
                .Where (a => a.RecordType == RecordType.A)
                .Select (a => ((ARecord)a).Address).ToList ();

            foreach(CNameRecord rec 
                in msg.AnswerRecords.Where( a => a.RecordType == RecordType.CName))
            {
                addrs = addrs.Concat(ResolveAddress(dns, rec.CanonicalName )).ToList();
            }

            return addrs.Distinct ().ToList ();
        }

        [Test]
        public void TestResolveByGoogle()
        {
            var google = new System.Net.IPAddress (new byte[4]{ 8, 8, 8, 8 });

            var addrs = ResolveAddress (
                            new DnsClient (google, 3000), 
                            "www.microsoft.com");

        }