protected override async Task ConnectImpl(CancellationToken cancellationToken = default(CancellationToken))
{
if (IsListenerConnection)
{
throw new InvalidOperationException($"{this}: Cannot call {nameof(Connect)}");
}
Log.Info($"{this}: Starting to {nameof(Connect)} to {RemoteAddress}...");
var hostParts = RemoteAddress.Split(':');
if (hostParts.Length != 2)
{
throw new FormatException($"{this}: {nameof(RemoteAddress)} is in the wrong format '{RemoteAddress}.' Should be in the format 'hostname:port' for example 'localhost:4356' or 'jumbo.fried.jims.aquarium:4453'");
}
var host = hostParts[0];
var port = int.Parse(hostParts[1]);
Log.Info($"{this}: Resolving IPAddresses for {host}...");
IPAddress[] addresses = null;
cancellationToken.ThrowIfCancellationRequested();
await ResilliantTask.Run(async() => addresses = await Dns.GetHostAddressesAsync(host), cancellationToken : cancellationToken);
cancellationToken.ThrowIfCancellationRequested();
addresses = addresses ?? new IPAddress[0];
Log.Info($"{this}: Found {addresses.Length.ToString()}: {string.Join(", ", (object[])addresses)}");
if (addresses.Length == 0)
{
throw new InvalidOperationException($"Unable to find any IP address for host {host} :(");
}
foreach (var address in addresses)
{
try {
Log.Info($"{this}: Trying to connect to {address}:{port}...");
cancellationToken.ThrowIfCancellationRequested();
await _client.ConnectAsync(address, port);
_clientStream = _client.GetStream() ?? throw new InvalidOperationException("Null stream " + nameof(_client) + "." + nameof(_client.GetStream));
Log.Info($"{this}: Connected to {address}:{port}...");
return;
} catch (Exception ex) {
Log.Warn($"{this}: Error connecting to {RemoteAddress} using the address {address}", ex);
}
}
throw new CouldNotConnectException($"{this}: Unable to connect to host {host}. Check logs for previous errors.");
}
