// Assigning a route to each destination node
public List <RoutingPacket> DSRRouteDiscovery(MobileNode destNode, SimulationEnvironment env)
{
RoutingPacket rPacket = new RoutingPacket();
List <RoutingPacket> routes = DSRDiscovery(destNode, env, rPacket);
if (knownRoutes.ContainsKey(destNode.GetNodeID()))
{
foreach (RoutingPacket r in routes)
{
bool exists = false;
foreach (RoutingPacket r2 in knownRoutes[destNode.GetNodeID()])
{
if (r2.RouteCompare(r))
{
exists = true;
break;
}
}
if (!exists)
{
knownRoutes[destNode.GetNodeID()].Add(r);
}
}
}
else
{
knownRoutes.Add(destNode.GetNodeID(), routes);
}
return(routes);
}
public List <RoutingPacket> RouteDiscoveryDSR(MobileNode destNode, SimulationEnvironment env)
{
Console.WriteLine("Performing Route Discovery from Node {0} to Node {1}.", nodeID, destNode.GetNodeID());
RoutingPacket rPacket = new RoutingPacket();
List <RoutingPacket> routes = DSRDicovery(destNode, env, rPacket);
if (knownRoutes.ContainsKey(destNode.GetNodeID()))
{
foreach (RoutingPacket r in routes)
{
bool exists = false;
foreach (RoutingPacket r2 in knownRoutes[destNode.GetNodeID()])
{
if (r2.RouteCompare(r))
{
exists = true;
break;
}
}
if (!exists)
{
knownRoutes[destNode.GetNodeID()].Add(r);
}
}
}
else
{
knownRoutes.Add(destNode.GetNodeID(), routes);
}
return(routes);
}
public List <RoutingPacket> GetRoutesToNode(MobileNode node)
{
// If there are no known routes for this destination, return null.
if (!knownRoutes.ContainsKey(node.GetNodeID()))
{
return(null);
}
// Otherwise, return the list of known routes.
return(knownRoutes[node.GetNodeID()]);
}
// Adding nodes to routes
private List <RoutingPacket> DSRDiscovery(MobileNode destNode, SimulationEnvironment env, RoutingPacket route)
{
List <RoutingPacket> routes = new List <RoutingPacket>();
if (knownRoutes.ContainsKey(destNode.GetNodeID()))
{
foreach (RoutingPacket r in knownRoutes[destNode.GetNodeID()])
{
RoutingPacket r2 = route.Copy();
r2.AddNodesToRoute(r.GetNodeRoute());
routes.Add(r2);
}
return(routes);
}
List <MobileNode> nodesWithinRange = GetNodesWithinRange(env);
if (nodesWithinRange.Count == 0 && !destNode.Equals(this))
{
return(null);
}
foreach (MobileNode node in nodesWithinRange)
{
if (!route.IsInRouteAlready(node))
{
if (node.Equals(destNode))
{
RoutingPacket rPacket = route.Copy();
rPacket.AddNodeToRoute(this);
rPacket.AddNodeToRoute(node);
routes.Add(rPacket);
}
else
{
RoutingPacket rPacket = route.Copy();
rPacket.AddNodeToRoute(this);
routes.AddRange(node.DSRDiscovery(destNode, env, rPacket));
}
}
}
return(routes);
}
// Adding SendMessageSADSR here
public bool SendMessageDSR(Message message)
{
MobileNode sourceNode = message.GetSourceNode();
MobileNode destinationNode = message.GetDestinstationNode();
RoutingPacket route = sourceNode.GetBestRouteDSR(destinationNode);
// If no known route found
if (route == null)
{
Console.WriteLine("No Known Route to Destination.");
sourceNode.RouteDiscoveryDSR(destinationNode, this); // Perform Route Discovery
route = sourceNode.GetBestRouteDSR(destinationNode); // Attempt to assign newly found best route
if (route == null)
{
Console.WriteLine("No Route to Destination.");
return(false);
}
}
Console.WriteLine("Sending Message:");
Console.WriteLine("Source Node: " + sourceNode.GetNodeID());
Console.WriteLine("Destination Node: " + destinationNode.GetNodeID());
Console.WriteLine("Route Chosen: " + route.GetRouteAsString());
List <MobileNode> nodes = route.GetNodeRoute();
Console.WriteLine("Beginning Message Transmission from Source Node " + sourceNode.GetNodeID());
for (int i = 1; i < nodes.Count; i++)
{
Console.WriteLine("Sending Message from {0} to {1}.", nodes[i - 1].GetNodeID(), nodes[i].GetNodeID());
nodes[i - 1].TransmitPacket();
nodes[i].ReceiveProcessPacket();
}
Console.WriteLine("Received Message at Destination Node " + destinationNode.GetNodeID());
return(true);
}
private List <RoutingPacket> DSRDicovery(MobileNode destNode, SimulationEnvironment env, RoutingPacket route)
{
List <RoutingPacket> routes = new List <RoutingPacket>();
if (knownRoutes.ContainsKey(destNode.GetNodeID()))
{
foreach (RoutingPacket r in knownRoutes[destNode.GetNodeID()])
{
RoutingPacket r2 = route.Copy();
r2.AddNodesToRoute(r.GetNodeRoute());
routes.Add(r2);
}
return(routes);
}
List <MobileNode> nodesWithinRange = GetNodesWithinRange(env);
if (nodesWithinRange.Count == 0 && !destNode.Equals(this))
{
return(null);
}
foreach (MobileNode node in nodesWithinRange)
{
// If node isn't in route yet...
if (!route.IsInRouteAlready(node))
{
// If node is the destination node...
if (node.Equals(destNode))
{
//Obtaining all possible routes
RoutingPacket rPacket = route.Copy();
rPacket.AddNodeToRoute(this); // Adding nodes to route
rPacket.AddNodeToRoute(node);
routes.Add(rPacket); // Adding all possible routes
Console.WriteLine("Sending RREQ from Node {0} to Node {1}.", nodeID, node.GetNodeID());
TransmitPacket();
node.ReceiveProcessPacket();
Console.WriteLine("Sending RREP from Node {0} to Node {1}.", node.GetNodeID(), nodeID);
node.TransmitPacket();
ReceiveProcessPacket();
}
else
{
RoutingPacket rPacket = route.Copy();
rPacket.AddNodeToRoute(this);
Console.WriteLine("Sending RREQ from Node {0} to Node {1}.", nodeID, node.GetNodeID());
TransmitPacket();
node.ReceiveProcessPacket();
routes.AddRange(node.DSRDicovery(destNode, env, rPacket)); // Recursive call
}
}
}
foreach (RoutingPacket r in routes)
{
if (r.GetNodeRoute().Contains(destNode))
{
List <MobileNode> rList = r.GetNodeRoute();
for (int i = 0; i < rList.Count; i++)
{
if (rList[i] == this && i != 0)
{
Console.WriteLine("Sending RREP from Node {0} to Node {1}.", nodeID, rList[i - 1].GetNodeID());
TransmitPacket();
rList[i - 1].GetNodeID();
}
}
}
}
return(routes);
}
public void Print() => Console.WriteLine("Message from Node {0} to Node {1}.", sourceNode.GetNodeID(), destinationNode.GetNodeID());
