private void OutgoingAodvRouteErrorMessageHandler(NetSimQueuedMessage queuedMessage)
{
// get AodvHelloMessage instacne
var errorMessage = (AodvRouteErrorMessage)queuedMessage.Message;
// indicates that the error messages was broadcasted
if (this.Client.Connections.ContainsKey(errorMessage.Receiver))
{
if (this.IsConnectionReachable(errorMessage.Receiver))
{
// start message transport
this.Client.Connections[errorMessage.Receiver].StartTransportMessage(
errorMessage,
this.Client.Id,
errorMessage.Receiver);
}
}
else
{
// error message sgets forwared among active path
var nextHopId = this.Table.GetRouteFor(errorMessage.Receiver)?.NextHop;
if (nextHopId != null && this.IsConnectionReachable(nextHopId))
{
// start message transport
this.Client.Connections[nextHopId].StartTransportMessage(errorMessage, this.Client.Id, nextHopId);
}
}
}
/// <summary>
/// Handles the new outgoing message.
/// </summary>
/// <param name="queuedMessage">The queued message.</param>
private void HandleRouteDiscoveryForOutgoingMessage(NetSimQueuedMessage queuedMessage)
{
// if route not found and route discovery is not started for this message
if (!queuedMessage.IsRouteDiscoveryStarted)
{
// mark as started
queuedMessage.IsRouteDiscoveryStarted = true;
// increment SequenceNr every time a rreq gets sent
this.CurrentSequence.SequenceNr += 2;
// broadcast to all neighbors
this.Client.BroadcastMessage(
new AodvRouteRequestMessage()
{
Sender = this.Client.Id,
Receiver = queuedMessage.Message.Receiver,
RequestId = this.CurrentRequestId,
SenderSequenceNr = (AodvSequence)this.CurrentSequence.Clone(),
LastHop = this.Client.Id
},
false);
// increase route request id
this.CurrentRequestId++;
}
// and enqueue message again
this.OutputQueue.Enqueue(queuedMessage);
}
/// <summary>
/// Handles the new outgoing message.
/// </summary>
/// <param name="queuedMessage">The queued message.</param>
private void HandleRouteDiscoveryForOutgoingMessage(NetSimQueuedMessage queuedMessage)
{
// search the route for message (also in cache)
var searchedRoute = this.GetDsrRoute(queuedMessage.Message.Receiver);
// if route found - send the message via the connection
if (searchedRoute != null)
{
var sendMessage = queuedMessage.Message;
// pack message in dsrframemessage and set found route
var dsrFrame = new DsrFrameMessage()
{
Data = (NetSimMessage)sendMessage.Clone(),
Receiver = sendMessage.Receiver,
Sender = sendMessage.Sender,
Route = new List <string>(searchedRoute.Route),
};
// determine the next hop of the requested route
var nextHopId = dsrFrame.GetNextHop(this.Client.Id);
// lay message on wire - intial send
if (this.IsConnectionReachable(nextHopId))
{
this.Client.Connections[nextHopId].StartTransportMessage(dsrFrame, this.Client.Id, nextHopId);
}
else
{
this.HandleNotReachableRoute(nextHopId, null);
}
}
else
{
// if route not found and route discovery is not started for this message
if (!queuedMessage.IsRouteDiscoveryStarted)
{
// mark as started
queuedMessage.IsRouteDiscoveryStarted = true;
// broadcast to all neighbors
this.Client.BroadcastMessage(
new DsrRouteRequestMessage()
{
Sender = this.Client.Id,
Receiver = queuedMessage.Message.Receiver,
RequestId = this.CurrentRequestId,
Nodes = { this.Client.Id }
},
false);
// increase route request id
this.CurrentRequestId++;
}
// and enqueue message again
this.OutputQueue.Enqueue(queuedMessage);
}
}
private void OutgoingAodvRouteRequestMessageHandler(NetSimQueuedMessage queuedMessage)
{
// get dsr requestMessage instacne - note: the request message was alreay handled in incomings messages
var requestMessage = (AodvRouteRequestMessage)queuedMessage.Message;
// broadcast to all neighbors
this.Client.BroadcastMessage(requestMessage, false);
}
/// <summary>
/// Handles the outgoing DSR message.
/// Note: Messages handled in this methods where initially send from another node.
/// </summary>
/// <param name="queuedMessage">The queued message.</param>
private void ForwardAodvMessage(NetSimQueuedMessage queuedMessage)
{
// searches a handler method with the messagehandler attribute and the
// right message type and for incoming(false) or outgoing (true, default) messages.
// e.g. IncomingAodvRouteRequestMessageHandler
var method = this.handlerResolver.GetHandlerMethod(queuedMessage.Message.GetType());
method?.Invoke(this, new object[] { queuedMessage });
}
private void OutgoingAodvHelloMessageHandler(NetSimQueuedMessage queuedMessage)
{
// get AodvHelloMessage instacne
var helloMessage = (AodvHelloMessage)queuedMessage.Message;
if (this.IsConnectionReachable(helloMessage.Receiver))
{
// start message transport
this.Client.Connections[helloMessage.Receiver].StartTransportMessage(
helloMessage,
this.Client.Id,
helloMessage.Receiver);
}
}
private void OutgoingDsrRouteErrorMessageHandler(NetSimQueuedMessage queuedMessage)
{
var errorMessage = (DsrRouteErrorMessage)queuedMessage.Message;
// get the next hop id from the route info saved within this message
string nextHopId = errorMessage.GetNextReverseHop(this.Client.Id);
// if client has this connection (e.g. not deleted) and connection is not offline
if (this.IsConnectionReachable(nextHopId))
{
// start message transport
this.Client.Connections[nextHopId].StartTransportMessage(errorMessage, this.Client.Id, nextHopId);
}
}
private void OutgoingDsrRouteReplyMessageHandler(NetSimQueuedMessage queuedMessage)
{
var responseMessage = (DsrRouteReplyMessage)queuedMessage.Message;
// get the next hop id from the route info saved within this message
string nextHopId = responseMessage.GetNextReverseHop(this.Client.Id);
if (this.IsConnectionReachable(nextHopId))
{
// start message transport
this.Client.Connections[nextHopId].StartTransportMessage(responseMessage, this.Client.Id, nextHopId);
}
else
{
this.HandleNotReachableRoute(nextHopId, null);
}
}
private void OutgoingAodvRouteReplyMessageHandler(NetSimQueuedMessage queuedMessage)
{
var aodvTable = (AodvTable)this.Table;
var responseMessage = (AodvRouteReplyMessage)queuedMessage.Message;
// get the next hop id from the route table (reverse route)
string nextHopId = aodvTable.GetRouteFor(responseMessage.Receiver).NextHop;
if (this.IsConnectionReachable(nextHopId))
{
// start message transport
this.Client.Connections[nextHopId].StartTransportMessage(responseMessage, this.Client.Id, nextHopId);
}
else
{
this.HandleRouteError(nextHopId, responseMessage.Sender, responseMessage.Receiver);
}
}
private void OutgoingDsrFrameMessageHandler(NetSimQueuedMessage queuedMessage)
{
// get dsr frame message instacne
var frameMessage = (DsrFrameMessage)queuedMessage.Message;
// get next hop from in frame message saved route info
var nextHop = frameMessage.GetNextHop(this.Client.Id);
if (this.IsConnectionReachable(nextHop))
{
// lay message "on" wire - start transmitting via connection
this.Client.Connections[nextHop].StartTransportMessage(frameMessage, this.Client.Id, nextHop);
}
else
{
this.HandleNotReachableRoute(nextHop, frameMessage);
}
}
