public async Task <ConnectAckCode> ConnectAsync(string clientId, string username, string password,
int keepaliveSeconds)
{
code = null;
ConnectMessage msg = new ConnectMessage(clientId, username, password, keepaliveSeconds, true);
if (!Channel.IsConnected)
{
try
{
await Channel.OpenAsync();
}
catch (Exception ex)
{
OnChannelError?.Invoke(this, new ChannelErrorEventArgs(Channel.Id, ex));
return(ConnectAckCode.ServerUnavailable);
}
try
{
Receive(Channel);
}
catch (Exception ex)
{
OnChannelError?.Invoke(this, new ChannelErrorEventArgs(Channel.Id, ex));
return(ConnectAckCode.ServerUnavailable);
}
}
try
{
await Channel.SendAsync(msg.Encode());
DateTime expiry = DateTime.UtcNow.AddMilliseconds(timeoutMilliseconds);
while (!code.HasValue)
{
await Task.Delay(10);
if (DateTime.UtcNow > expiry)
{
throw new TimeoutException("MQTT connection timed out.");
}
}
return(code.Value);
}
catch (Exception ex)
{
OnChannelError?.Invoke(this, new ChannelErrorEventArgs(Channel.Id, ex));
return(ConnectAckCode.ServerUnavailable);
}
}
private void Channel_OnClose(object sender, ChannelCloseEventArgs args)
{
try
{
code = null;
this.channel.Dispose();
}
catch (Exception ex)
{
Trace.TraceWarning("Piraeus MQTT client fault disposing channel.");
Trace.TraceError(ex.Message);
}
}
public async Task ConnectAsync(string clientId, string username, string password, int keepaliveSeconds, bool cleanSession)
{
code = null;
ConnectMessage msg = new ConnectMessage(clientId, username, password, keepaliveSeconds, cleanSession);
if (!channel.IsConnected)
{
await channel.OpenAsync();
Task task = channel.ReceiveAsync();
await Task.WhenAll(task);
}
await channel.SendAsync(msg.Encode());
}
private void Session_OnConnect(object sender, MqttConnectionArgs args)
{
code = args.Code;
}
private void Channel_OnClose(object sender, ChannelCloseEventArgs args)
{
MqttConnectCode = null;
}