public async Task <DnsAnswer> Query(DnsHeader query, CancellationToken token)
{
var raw = DnsByteExtensions.ToBytes(query).ToArray();
var payload = DnsByteExtensions.ToBytes((ushort)raw.Length).Concat(raw).ToArray();
var stream = _socket.GetStream();
await stream.WriteAsync(payload, 0, payload.Length, token);
var buffer = new byte[4096];
var receive = await stream.ReadAsync(buffer, 0, buffer.Length, token);
stream.Close();
var offset = 0;
var responseLength = DnsByteExtensions.ReadUInt16(buffer, ref offset);
var response = DnsByteExtensions.ReadBytes(buffer, responseLength, ref offset);
if (response.Length != responseLength)
{
throw new InvalidOperationException();
}
return(DnsByteExtensions.FromBytes <DnsAnswer>(response));
}
/// <inheritdoc/> public void ReadBytes(byte[] bytes, ref int offset, int length) => IPAddress = new IPAddress(DnsByteExtensions.ReadBytes(bytes, length, ref offset));
public void ReadARecordTests(int example, int offset, byte[] expected)
{
var value = DnsByteExtensions.ReadBytes(SampleDnsPackets.Answers[example - 1], 4, ref offset);
Assert.Equal(expected, value);
}
/// <inheritdoc/>
public void ReadBytes(byte[] bytes, ref int offset, int length)
{
Raw = DnsByteExtensions.ReadBytes(bytes, length, ref offset);
}
