Fix duplicate wireless link error

EduNetworkBuilder/NetworkBuilder.cs

@@ -752,6 +752,7 @@ namespace EduNetworkBuilder
                     //We are making a link
                     LinkEditor myEditor = new LinkEditor(ItemClickedOn, ReleasedOn);
                     myEditor.ShowDialog();
+                    UpdateLinks();
                     pbNetworkView.Invalidate(); //In case any changes have been made
                 }
                 else if (ItemClickedOn == null)

EduNetworkBuilder/NetworkCard.cs

@@ -394,7 +394,7 @@ namespace EduNetworkBuilder
                         if (tPacket.MyType == PacketType.arp_request && !nf.isLocal(tPacket.destIP))
                             continue;  //only send out arp requests on local networks
                         nPacket = new Packet(tPacket);//Creates a new packet but sets isfresh=false
-                        if (nf.isLocal(tPacket.OutboundIP) || tPacket.OutboundIP.GetIPString == NB.BroadcastIPString)
+                        if (tPacket.OutboundIP == null || (nf.isLocal(tPacket.OutboundIP) || tPacket.OutboundIP.GetIPString == NB.BroadcastIPString))
                         {
                             if ((nf != null && nf.myIP.GetIPString != NB.ZeroIPString) || nPacket.MyType == PacketType.dhcp_request)
                             {
@@ -442,7 +442,7 @@ namespace EduNetworkBuilder
                     foreach (NetworkInterface nf in interfaces.ToList())
                     {
                         nPacket = new Packet(tPacket);//Creates a new packet but sets isfresh=false
-                        if (nf.isLocal(tPacket.OutboundIP) || tPacket.OutboundIP.GetIPString == NB.BroadcastIPString)
+                        if (tPacket.OutboundIP != null && (nf.isLocal(tPacket.OutboundIP) || tPacket.OutboundIP.GetIPString == NB.BroadcastIPString))
                         {
                             if ((nf != null && nf.myIP != null && nf.myIP.GetIPString != NB.ZeroIPString) || nPacket.MyType == PacketType.dhcp_request)
                             {
@@ -531,7 +531,7 @@ namespace EduNetworkBuilder
                         //set it to be the ip of management interface
                         nPacket.sourceIP = WhereFrom.HubManagementIP();
                     }
-                    if (nPacket.destMAC == null || nPacket.destMAC == "")
+                    if (nPacket.destMAC == null || nPacket.destMAC == "" && tPacket.OutboundIP != null)
                     {
                         nPacket.destMAC = WhereFrom.LookupArpFromIP(tPacket.OutboundIP.GetIPString);
                     }
@@ -565,13 +565,13 @@ namespace EduNetworkBuilder
             Network mynet;
             NetworkDevice nd;
             //We make sure the MAC matches.
-            if (tPacket == null) return;
-            tPacket.InboundNic = this; //track which nic we came in on.
-            if (myNicType == NicType.port || myNicType == NicType.wport)
-            {
-                //Try tracking the arp if we can
             mynet = NB.GetNetwork();
             nd = mynet.GetDeviceFromID(myID);
+            if (tPacket == null) return;
+            tPacket.InboundNic = this; //track which nic we came in on.
+            if (myNicType == NicType.port || myNicType == NicType.wport || (nd.IsWirelessForwarder() && myNicType == NicType.wlan))
+            {
+                //Try tracking the arp if we can
                 if (tPacket.TsourceIP == null) tPacket.TsourceIP = tPacket.sourceIP;
                 nd.StoreArp(tPacket.sourceMAC, tPacket.TsourceIP.GetIP.ToIpString(), myID);
                 //If it is a return DHCP packet.  We should try to update the MAC

EduNetworkBuilder/NetworkDevice.cs

@@ -251,6 +251,7 @@ namespace EduNetworkBuilder
                         if(nl != null)
                         {
                             myNet.RemoveComponent(nl);
+                            nl.Destroy();
                         }
                         nic.ConnectedLink = -1;
                    }
@@ -647,8 +648,10 @@ namespace EduNetworkBuilder
             NICs[index].Edit();
             //If the nic was a wireless, make sure we copy the ssid and key to all other of identical type
             if (NICs[index].GetNicType == NicType.wport || NICs[index].GetNicType == NicType.wlan)
+            {
                 duplicateSSIDnKey(NICs[index].SSID, NICs[index].WirelessKey, NICs[index].GetNicType);
             }
+        }
         public void DeleteNic(int index)
         {
             if (index < 0) return;
@@ -1195,6 +1198,15 @@ namespace EduNetworkBuilder
             return null;
         }
 
+        public bool IsWirelessForwarder()
+        {
+            if (myType == NetworkComponentType.wrepeater) return true;
+            if (myType == NetworkComponentType.wap) return true;
+            if (myType == NetworkComponentType.wbridge) return true;
+            if (myType == NetworkComponentType.wrouter) return true;
+            return false;
+        }
+
         public override void ProcessPacket(Packet tPacket)
         {
             //Psuedo code for processing a packet
@@ -1306,7 +1318,8 @@ namespace EduNetworkBuilder
                     case NicType.wlan:
                         //If the packet is a new packet and is not connecting to itself
                         //or, if it is routing away.
-                        if ((tPacket.isFresh && !ExactMatch ) || (NeedsRouting && DoesRouting()))
+                        if ((tPacket.isFresh && !ExactMatch ) || (NeedsRouting && DoesRouting()) ||
+                            IsWirelessForwarder())
                         {
                             //Pass it to the NIC to send out each nic+interface.
                             //The nic checks to see if it works and then processes it                            
@@ -2160,7 +2173,8 @@ namespace EduNetworkBuilder
             if (myType == NetworkComponentType.net_switch) return true;
             if (myType == NetworkComponentType.wap) return true;
             if (myType == NetworkComponentType.wrouter) return true;
-            if (myType == NetworkComponentType.wbridge) return true;
+            if (myType == NetworkComponentType.wrepeater) return true;
+            if (myType == NetworkComponentType.wrouter) return true;
             return false;
         }
         /// <summary>

EduNetworkBuilder/NetworkLink.cs

@@ -47,7 +47,7 @@ namespace EduNetworkBuilder
                     Client = sNic;
                     IsWireless = true;
                 }
-                if(IsWireless && AccessPoint != null && Client != null)
+                if(IsWireless && AccessPoint != null && Client != null && AccessPoint.SSID != null && AccessPoint.SSID != "")
                 {
                     bool donesomething=false;
                     if(AccessPoint.SSID != Client.SSID)