public MqttConsumer()
{
/*
* MqttServerOptions validator = new MqttServerOptions();
* validator.ConnectionValidator = new IMqttServerConnectionValidator(
* {
*
* c.ReturnCode = MqttConnectReturnCode.ConnectionAccepted;
* Console.WriteLine("Connexion OK");
* }
*
*
* MqttServerOptions subValidator = new MqttServerOptions();
* subValidator.SubscriptionInterceptor = context =>
* {
* context.AcceptSubscription = true;
* Console.WriteLine("Subscribe OK");
*
* };
*
*/
//var certificate = new X509Certificate(@"C:\Users\StreamX\Desktop\TestCa.crt", "");
//MqttServerOptions certifOption = new MqttServerOptions();
//certifOption.TlsEndpointOptions.Certificate = certificate.Export(X509ContentType.Cert);
//certifOption.TlsEndpointOptions.IsEnabled = true;
var conUserValidator = new MqttServerOptions
{
ConnectionValidator = new MqttServerConnectionValidatorDelegate(p =>
{
//if (p.ClientId != "SpecialClient") return;
if (p.Username != "test" || p.Password != "test")
{
p.ReasonCode = MqttConnectReasonCode.BadUserNameOrPassword;
}
if (string.IsNullOrEmpty(p.ClientId))
{
return;
}
}),
ApplicationMessageInterceptor = new MqttServerApplicationMessageInterceptorDelegate(context =>
{
/*
* if (!MqttTopicFilterComparer.IsMatch(context.ApplicationMessage.Topic, "platooning"))
* {
* // Replace the payload with the timestamp. But also extending a JSON
* // based payload with the timestamp is a suitable use case.
* context.ApplicationMessage.Payload = Encoding.UTF8.GetBytes(DateTime.Now.ToString("O"));
* }*/
if (!context.ApplicationMessage.Topic.StartsWith("platooning/"))
{
context.AcceptPublish = false;
context.CloseConnection = true;
}
}),
SubscriptionInterceptor = new MqttServerSubscriptionInterceptorDelegate(context =>
{
if (context.TopicFilter.Topic.StartsWith("platooning/broadcast/"))
{
var plotooningId = context.TopicFilter.Topic.Replace("platooning/broadcast/", "");
using var dbcontext = new MqttBrokerDbContext();
try
{
var followvehicleEnable = dbcontext.Platoon.FirstOrDefault(f => f.Enable &&
f.IsFollower &&
f.ClientId == context.ClientId && f.PlatoonRealId == plotooningId);
if (followvehicleEnable == null)
{
context.AcceptSubscription = false;
context.CloseConnection = true;
}
}
catch (Exception exception)
{
var log = new Log
{
Exception = exception.StackTrace
};
dbcontext.Log.AddAsync(log);
dbcontext.SaveChanges();
Console.WriteLine(exception);
}
//context.AcceptSubscription = false;
//context.CloseConnection = true;
}
if (context.TopicFilter.Topic.StartsWith("admin/foo/bar") && context.ClientId != "theAdmin")
{
//context.AcceptSubscription = false;
}
if (context.TopicFilter.Topic.StartsWith("the/secret/stuff") && context.ClientId != "Imperator")
{
//context.AcceptSubscription = false;
//context.CloseConnection = true;
}
})
};
OptionsBuilder = new MqttServerOptionsBuilder()
.WithClientCertificate()
.WithConnectionBacklog(100)
.WithDefaultEndpointPort(1883)
.WithConnectionValidator(conUserValidator.ConnectionValidator)
.WithApplicationMessageInterceptor(conUserValidator.ApplicationMessageInterceptor)
.WithSubscriptionInterceptor(conUserValidator.SubscriptionInterceptor)
.WithPersistentSessions()
// .WithEncryptionCertificate(certifOption.TlsEndpointOptions.Certificate)
//.WithEncryptedEndpoint()
.Build();
Server = new MqttFactory().CreateMqttServer();
}
public async Task StartConsume()
{
try
{
await Server.StartAsync(OptionsBuilder);
}
catch (Exception ex)
{
StopConsume();
Console.WriteLine(ex.Message);
throw;
}
Server.StartedHandler = new MqttServerStartedHandlerDelegate(e =>
{
Console.WriteLine("Mqtt Broker start");
});
Server.StoppedHandler = new MqttServerStoppedHandlerDelegate(e =>
{
Console.WriteLine("Mqtt Broker stop");
});
Server.ClientSubscribedTopicHandler = new MqttServerClientSubscribedHandlerDelegate(e =>
{
var vehicleId = e.TopicFilter.Topic
.Replace("platooning/", "").Replace("/#", "");
Console.WriteLine("Client subscribed " + e.ClientId + " topic " + e.TopicFilter.Topic + "Vehicle Id " +
vehicleId);
using var context = new MqttBrokerDbContext();
try
{
var audit = new Audit
{
ClientId = e.ClientId,
Type = "Sub",
Topic = e.TopicFilter.Topic,
Payload = JsonConvert.SerializeObject(e.TopicFilter, Formatting.Indented)
};
context.Audit.AddAsync(audit);
var subs = context.Subscribe.AsQueryable()
.FirstOrDefault(s => s.Topic == e.TopicFilter.Topic &&
s.ClientId == e.ClientId &&
s.QoS == e.TopicFilter.QualityOfServiceLevel.ToString());
if (subs != null)
{
return;
}
var subClient = new Subscribe
{
Topic = e.TopicFilter.Topic,
Enable = true,
ClientId = e.ClientId,
QoS = e.TopicFilter.QualityOfServiceLevel.ToString()
};
context.Subscribe.AddAsync(subClient);
context.SaveChanges();
}
catch (Exception exception)
{
var log = new Log
{
Exception = exception.StackTrace
};
context.Log.AddAsync(log);
context.SaveChanges();
Console.WriteLine(exception);
}
});
Server.ClientUnsubscribedTopicHandler = new MqttServerClientUnsubscribedTopicHandlerDelegate(args =>
{
try
{
var clientId = args.ClientId;
var topicFilter = args.TopicFilter;
Console.WriteLine($"[{DateTime.Now}] Client '{clientId}' un-subscribed to {topicFilter}.");
using var context = new MqttBrokerDbContext();
try
{
var sub = context.Subscribe.AsQueryable()
.FirstOrDefault(a => a.Topic == args.TopicFilter && a.ClientId == clientId);
if (sub == null)
{
return;
}
context.Subscribe.Update(sub !);
context.SaveChanges();
sub.Enable = false;
}
catch (Exception exception)
{
var log = new Log
{
Exception = exception.StackTrace
};
context.Log.AddAsync(log);
context.SaveChanges();
Console.WriteLine(exception);
}
}
catch (Exception ex)
{
Console.WriteLine($"[{DateTime.Now}] Client get error " + ex.Message);
}
});
Server.ClientConnectedHandler = new MqttServerClientConnectedHandlerDelegate(e =>
{
Console.WriteLine("Client Connected " + e.ClientId);
});
Server.ApplicationMessageReceivedHandler = new MqttApplicationMessageReceivedHandlerDelegate(e =>
{
using var context = new MqttBrokerDbContext();
try
{
var payload = FunctionHelpers.GetPayload(e.ApplicationMessage.Payload);
var audit = new Audit
{
ClientId = e.ClientId,
Type = "Pub",
Topic = e.ApplicationMessage.Topic,
Payload = JsonConvert.SerializeObject(payload, Formatting.Indented)
};
context.Audit.AddAsync(audit);
if (e.ClientId == null)
{
var log = new Log
{
Exception = new string("Broker publish message itself " +
JsonConvert.SerializeObject(payload, Formatting.Indented) + " " +
e.ClientId)
};
context.Log.AddAsync(log);
context.SaveChanges();
return;
}
if (payload.Maneuver == Maneuver.CreatePlatoon)
{
var vehPla = e.ApplicationMessage.Topic.Replace("platooning/message/", "");
var platoonId = vehPla.Split("/").Last();
var pla = context.Platoon.AsQueryable()
.FirstOrDefault(f => f.Enable && f.PlatoonRealId == platoonId);
if (pla == null)
{
var platoon = new Platoon()
{
Enable = true,
ClientId = e.ClientId,
IsLead = true,
VechicleId = vehPla.Split("/").First(),
PlatoonRealId = vehPla.Split("/").Last()
};
context.Platoon.AddAsync(platoon);
Console.WriteLine($"[{DateTime.Now}] Creating new Platoon Client Id " + e.ClientId +
" platooning Id" + platoon.PlatoonRealId + " payload " + audit.Payload);
}
else
{
Console.WriteLine($"[{DateTime.Now}] Platoon is already created Client Id " + e.ClientId +
" platooning Id" + platoonId + " payload " + audit.Payload);
}
}
else if (payload.Maneuver == Maneuver.JoinRequest)
{
var followingVec = e.ApplicationMessage.Topic.Replace("platooning/message/", "");
var isFollowing = context.Platoon.FirstOrDefault(f => f.IsFollower && f.VechicleId == followingVec && f.Enable);
if (isFollowing != null)
{
return;
}
var platoonLead = context.Platoon.AsQueryable().FirstOrDefault(f => f.IsLead && f.Enable);
if (platoonLead != null)
{
var platoon = new Platoon()
{
Enable = false,
ClientId = e.ClientId,
IsLead = false,
IsFollower = true,
VechicleId = followingVec,
PlatoonRealId = platoonLead.PlatoonRealId
};
context.Platoon.AddAsync(platoon);
Console.WriteLine($"[{DateTime.Now}] Join Platoon Client Id " + e.ClientId +
" platooning Id" + platoon.PlatoonRealId + " payload " + audit.Payload);
var message = new BitArray(_dataLenght);
message.Set(0, false);
message.Set(1, false);
message.Set(2, true);
Server.PublishAsync("platooning/" + platoonLead.ClientId + "/" + followingVec,
Encoding.ASCII.GetString(FunctionHelpers.BitArrayToByteArray(message)));
}
}
else if (payload.Maneuver == Maneuver.JoinAccepted)
{
Console.WriteLine($"[{DateTime.Now}] Join accepted Client Id " + e.ClientId + " payload " +
audit.Payload);
var splitTopic = e.ApplicationMessage.Topic.Split("/");
var followvehicleId = splitTopic[1];
var leadVehicle = splitTopic[2];
var plattonId = splitTopic[3];
var platoonfollow = context.Platoon.AsQueryable()
.FirstOrDefault(f => f.IsFollower && f.ClientId == followvehicleId);
if (platoonfollow != null)
{
platoonfollow.Enable = true;
platoonfollow.PlatoonRealId = plattonId;
context.Platoon.Update(platoonfollow);
}
else
{
var platoonlead = context.Platoon.AsQueryable()
.FirstOrDefault(f => f.IsLead && f.Enable && f.ClientId == leadVehicle);
if (platoonlead != null)
{
var platoon = new Platoon()
{
Enable = true,
ClientId = e.ClientId,
IsLead = false,
IsFollower = true,
VechicleId = followvehicleId,
PlatoonRealId = platoonlead.PlatoonRealId
};
context.Platoon.AddAsync(platoon);
}
}
}
else
{
var log = new Log
{
Exception = new string("Unknown Maneuver " +
JsonConvert.SerializeObject(payload, Formatting.Indented) + " " +
e.ClientId)
};
context.Log.AddAsync(log);
}
}
catch (Exception exception)
{
Console.WriteLine(exception);
var log = new Log
{
Exception = exception.StackTrace
};
context.Log.AddAsync(log);
context.SaveChanges();
}
context.SaveChanges();
OnDataReceived(e.ApplicationMessage.Payload);
//Console.WriteLine("Message Received");
//Console.WriteLine(e.ClientId + " " + e.ApplicationMessage.Topic);
//Console.WriteLine(e.ClientId + " " + e.ApplicationMessage.ConvertPayloadToString());
});
}
