// 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);
}
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);
}
