DHCP works better with vlans, added some puzzles

EduNetworkBuilder/EduNetworkBuilder.csproj

@@ -278,6 +278,12 @@
     <None Include="Resources\Level5_WirelessRepeater.enbx" />
     <None Include="Resources\Level5_WirelessRepeater2.enbx" />
     <None Include="Resources\Level5_WirelessRouters.enbx" />
+    <None Include="Resources\Level6_ForbiddenVLAN.enbx" />
+    <None Include="Resources\Level6_TaggedBetweenSwitches.enbx" />
+    <None Include="Resources\Level6_VLANRouting.enbx" />
+    <None Include="Resources\Level6_VLANRouting2.enbx" />
+    <None Include="Resources\Level6_VLAN_Intro.enbx" />
+    <None Include="Resources\Level6_VLAN_Intro2.enbx" />
     <None Include="Resources\OneNet.enbx" />
     <None Include="Resources\ThreeNets.enbx" />
     <None Include="Resources\TwoNets.enbx" />
@@ -344,6 +350,7 @@
     <None Include="Resources\noBeep.wav" />
     <None Include="Resources\tablet.png" />
     <None Include="Resources\PC.png" />
+    <None Include="Resources\VLAN.enbx" />
     <None Include="Resources\WRepeater.png" />
     <None Include="Resources\WBridge.png" />
     <None Include="Resources\WRouter.png" />

EduNetworkBuilder/NB.cs

@@ -70,7 +70,10 @@ namespace EduNetworkBuilder
         Level4_DualWans, Level4_SinglesLife, Level4_SmallSubnets, Level4_OneRoute, Level4_RouterReplacement,
         Level4_InternalSubnetting, Level4_Internalhemorrhage,
         Level5_WirelessRouters, Level5_WirelessDevices, Level5_WirelessBridge, Level5_WirelessRepeater, Level5_WirelessRepeater2,
-        Level5_WirelessAccessPoint, Level5_WirelessCorruption, Level5_Failed, Level5_LostPacket, Level5_HereComesTrouble
+        Level5_WirelessAccessPoint, Level5_WirelessCorruption, Level5_Failed, Level5_LostPacket, Level5_HereComesTrouble,
+        Level6_VLAN_Intro, Level6_VLAN_Intro2, Level6_ForbiddenVLAN, Level6_TaggedBetweenSwitches, Level6_VLANRouting,
+        Level6_VLANRouting2,
+
     }
     public enum DebugPausePoint { none=0, packet_create=1, packet_kill=2, 
         packet_in=4, packet_out=8, packet_duplicate=16, all=63, 
@@ -233,7 +236,7 @@ namespace EduNetworkBuilder
         public static string ZeroIPString = "0.0.0.0";
         public static string LoopbackIPString = "127.0.0.1";
         public static int LinkStep = 8;//The percentage of the link we move at each "tick"
-        public static int PacketPixelSize = 8; //The size of the packet pixel
+        public static int PacketPixelSize = 16; //The size of the packet pixel
         public static int PacketVersionNum = 2; //2 uses the new stuff.  Anything else uses the old stuff
         public const int GridSize = 10;
         public static string[,] LanguageChoices = { { NB.Translate("NB_NBEn"), "en" }, { NB.Translate("NB_NBFr"), "fr" } };

EduNetworkBuilder/NetTest.cs

@@ -525,7 +525,6 @@ namespace EduNetworkBuilder
                     if (TheTest == NetTestType.NeedsForbiddenVLAN && vi.Tag == VLANTagType.Forbidden) return true;
                     if (TheTest == NetTestType.NeedsUntaggedVLAN && vi.Tag == VLANTagType.Untagged) return true;
                     if (TheTest == NetTestType.NeedsTaggedVLAN && vi.Tag == VLANTagType.Tagged) return true;
-                    return false;
                     break;
                 case NetTestType.LockAll:
                 case NetTestType.LockDHCP:

EduNetworkBuilder/Network.cs

@@ -9,6 +9,7 @@ using System.Xml;
 using System.IO;
 using System.Text.RegularExpressions;
 using System.ComponentModel;
+using System.Drawing.Imaging;
 
 
 namespace EduNetworkBuilder
@@ -55,6 +56,9 @@ namespace EduNetworkBuilder
         
         private bool previously_had_packets = false; //used on "tick" to determine if we are starting from scratch
 
+        private List<Color> PacketColors = new List<Color>();
+        private List<Image> PacketImages = new List<Image>();
+
         public Network(string Name)
         {
             TheNetImage = new Bitmap(myWidth, myHeight);
@@ -180,9 +184,19 @@ namespace EduNetworkBuilder
                             {
                                 int ID;
                                 int.TryParse(Individual.Attributes["ID"].Value, out ID);
+                                string colorname = "Blue";
+                                if (Individual.Attributes["Color"] != null)
+                                    colorname = Individual.Attributes["Color"].Value;
+                                Color PacketColor = Color.FromName(colorname);
                                 if (ID > 1)
                                 {
-                                    VlanNames.Add(new VLANName(ID, Individual.InnerText));
+                                    VlanNames.Add(new VLANName(ID, Individual.InnerText, PacketColor));
+                                    VLANsEnabled = true;
+                                }
+                                else
+                                {
+                                    VlanNames.RemoveAt(0);
+                                    VlanNames.Insert(0,new VLANName(ID, Individual.InnerText, PacketColor));
                                     VLANsEnabled = true;
                                 }
                             }
@@ -292,6 +306,7 @@ namespace EduNetworkBuilder
             {
                 writer.WriteStartElement("VLANName");
                 writer.WriteAttributeString("ID", VLAN.ID.ToString());
+                writer.WriteAttributeString("Color", VLAN.PacketColorString);
                 writer.WriteString(VLAN.Name);
                 writer.WriteEndElement();
             }
@@ -1404,6 +1419,72 @@ namespace EduNetworkBuilder
                 }
             }
         }
+
+        public Image GetPacketImage(Color PacketColor)
+        {
+            if(PacketColors.Contains(PacketColor))
+            {
+                return PacketImages[PacketColors.IndexOf(PacketColor)];
+            }
+            PacketColors.Add(PacketColor);
+            Image newPacketImage = new Bitmap(NB.PacketPixelSize, NB.PacketPixelSize);
+            using (Graphics G = Graphics.FromImage(newPacketImage))
+            {
+                G.Clear(Color.Transparent);
+//                Pen myPen = new Pen(PacketColor, NB.PacketPixelSize);
+                Brush tBrush = new SolidBrush(PacketColor);
+                G.FillEllipse(tBrush, 0,0, NB.PacketPixelSize, NB.PacketPixelSize);
+            }
+            PacketImages.Add(newPacketImage);
+            return newPacketImage;
+        }
+
+        public Color ColorFromPacketVLAN(int id)
+        {
+            foreach(VLANName VN in VlanNames)
+            {
+                if (VN.ID == id)
+                    return VN.PacketColor;
+            }
+            return Color.Blue;
+        }
+
+        //This function heavily borrowed from: http://stackoverflow.com/questions/1563038/fast-work-with-bitmaps-in-c-sharp
+        public Image ColoredImage(Image BaseImage, Color MorphColor)
+        {
+            Bitmap b = new Bitmap(BaseImage);
+
+            BitmapData bData = b.LockBits(new Rectangle(0, 0, BaseImage.Width, BaseImage.Height), ImageLockMode.ReadWrite, b.PixelFormat);
+
+            /* GetBitsPerPixel just does a switch on the PixelFormat and returns the number */
+            int bitsPerPixel = Image.GetPixelFormatSize(bData.PixelFormat);
+
+            /*the size of the image in bytes */
+            int size = bData.Stride * bData.Height;
+
+            /*Allocate buffer for image*/
+            byte[] data = new byte[size];
+
+            /*This overload copies data of /size/ into /data/ from location specified (/Scan0/)*/
+            System.Runtime.InteropServices.Marshal.Copy(bData.Scan0, data, 0, size);
+
+            for (int i = 0; i < size; i += bitsPerPixel / 8)
+            {
+                //double magnitude = 1 / 3d * (data[i] + data[i + 1] + data[i + 2]);
+
+                //data[i] is the first of 3 bytes of color
+                data[i] = (byte)((data[i] + MorphColor.B) / 2);
+                data[i + 1] = (byte)((data[i + 1] + MorphColor.G) / 2);
+                data[i + 2] = (byte)((data[i + 2] + MorphColor.R) / 2);
+            }
+
+            /* This override copies the data back into the location specified */
+            System.Runtime.InteropServices.Marshal.Copy(data, 0, bData.Scan0, data.Length);
+
+            b.UnlockBits(bData);
+
+            return b;
+        }
     }
 
 }

EduNetworkBuilder/NetworkBuilder.Designer.cs

@@ -78,6 +78,8 @@
             this.HelpPanel = new System.Windows.Forms.Panel();
             this.cbViewTitles = new System.Windows.Forms.CheckBox();
             this.myProgressBar = new System.Windows.Forms.ProgressBar();
+            this.VLANToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
+            this.SolvedVLANToolStripMenuItem1 = new System.Windows.Forms.ToolStripMenuItem();
             this.msMainMenuStrip.SuspendLayout();
             ((System.ComponentModel.ISupportInitialize)(this.pbNetworkView)).BeginInit();
             this.HelpPanel.SuspendLayout();
@@ -94,8 +96,8 @@
             this.samplesToolStripMenuItem});
             this.msMainMenuStrip.Location = new System.Drawing.Point(0, 0);
             this.msMainMenuStrip.Name = "msMainMenuStrip";
-            this.msMainMenuStrip.Padding = new System.Windows.Forms.Padding(4, 2, 0, 2);
+            this.msMainMenuStrip.Padding = new System.Windows.Forms.Padding(5, 2, 0, 2);
-            this.msMainMenuStrip.Size = new System.Drawing.Size(463, 28);
+            this.msMainMenuStrip.Size = new System.Drawing.Size(617, 28);
             this.msMainMenuStrip.TabIndex = 0;
             this.msMainMenuStrip.Text = "msMainMenuStrip";
             // 
@@ -287,7 +289,7 @@
             // puzzlesToolStripMenuItem
             // 
             this.puzzlesToolStripMenuItem.Name = "puzzlesToolStripMenuItem";
-            this.puzzlesToolStripMenuItem.Size = new System.Drawing.Size(140, 26);
+            this.puzzlesToolStripMenuItem.Size = new System.Drawing.Size(181, 26);
             this.puzzlesToolStripMenuItem.Text = "Puzzles";
             this.puzzlesToolStripMenuItem.Click += new System.EventHandler(this.puzzlesToolStripMenuItem_Click);
             // 
@@ -298,9 +300,10 @@
             this.oneNetworkToolStripMenuItem,
             this.twoNetworksToolStripMenuItem,
             this.threeNetworksToolStripMenuItem,
-            this.firewallsToolStripMenuItem});
+            this.firewallsToolStripMenuItem,
+            this.VLANToolStripMenuItem});
             this.solvedToolStripMenuItem.Name = "solvedToolStripMenuItem";
-            this.solvedToolStripMenuItem.Size = new System.Drawing.Size(140, 26);
+            this.solvedToolStripMenuItem.Size = new System.Drawing.Size(181, 26);
             this.solvedToolStripMenuItem.Text = "Solved";
             // 
             // dHCPToolStripMenuItem
@@ -345,9 +348,10 @@
             this.solvedOneNetworkToolStripMenuItem,
             this.solvedTwoNetworksToolStripMenuItem,
             this.SolvedThreeNetworksToolStripMenuItem,
-            this.firewallsToolStripMenuItem1});
+            this.firewallsToolStripMenuItem1,
+            this.SolvedVLANToolStripMenuItem1});
             this.toSolveToolStripMenuItem.Name = "toSolveToolStripMenuItem";
-            this.toSolveToolStripMenuItem.Size = new System.Drawing.Size(140, 26);
+            this.toSolveToolStripMenuItem.Size = new System.Drawing.Size(181, 26);
             this.toSolveToolStripMenuItem.Text = "To Solve";
             // 
             // solvedDHCPToolStripMenuItem
@@ -389,10 +393,10 @@
             // 
             this.panelChoices.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
             | System.Windows.Forms.AnchorStyles.Left)));
-            this.panelChoices.Location = new System.Drawing.Point(10, 25);
+            this.panelChoices.Location = new System.Drawing.Point(13, 31);
-            this.panelChoices.Margin = new System.Windows.Forms.Padding(2);
+            this.panelChoices.Margin = new System.Windows.Forms.Padding(3, 2, 3, 2);
             this.panelChoices.Name = "panelChoices";
-            this.panelChoices.Size = new System.Drawing.Size(59, 300);
+            this.panelChoices.Size = new System.Drawing.Size(79, 369);
             this.panelChoices.TabIndex = 2;
             // 
             // lbMessages
@@ -402,10 +406,10 @@
             this.lbMessages.Font = new System.Drawing.Font("Courier New", 8F);
             this.lbMessages.FormattingEnabled = true;
             this.lbMessages.ItemHeight = 16;
-            this.lbMessages.Location = new System.Drawing.Point(74, 329);
+            this.lbMessages.Location = new System.Drawing.Point(99, 405);
-            this.lbMessages.Margin = new System.Windows.Forms.Padding(2);
+            this.lbMessages.Margin = new System.Windows.Forms.Padding(3, 2, 3, 2);
             this.lbMessages.Name = "lbMessages";
-            this.lbMessages.Size = new System.Drawing.Size(366, 52);
+            this.lbMessages.Size = new System.Drawing.Size(487, 52);
             this.lbMessages.TabIndex = 3;
             this.lbMessages.DoubleClick += new System.EventHandler(this.lbMessages_DoubleClick);
             // 
@@ -413,10 +417,9 @@
             // 
             this.lblStatus.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left) 
             | System.Windows.Forms.AnchorStyles.Right)));
-            this.lblStatus.Location = new System.Drawing.Point(74, 400);
+            this.lblStatus.Location = new System.Drawing.Point(99, 492);
-            this.lblStatus.Margin = new System.Windows.Forms.Padding(2, 0, 2, 0);
             this.lblStatus.Name = "lblStatus";
-            this.lblStatus.Size = new System.Drawing.Size(365, 14);
+            this.lblStatus.Size = new System.Drawing.Size(487, 17);
             this.lblStatus.TabIndex = 4;
             this.lblStatus.Text = "lblStatus";
             this.lblStatus.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
@@ -427,10 +430,10 @@
             | System.Windows.Forms.AnchorStyles.Left) 
             | System.Windows.Forms.AnchorStyles.Right)));
             this.pbNetworkView.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
-            this.pbNetworkView.Location = new System.Drawing.Point(74, 25);
+            this.pbNetworkView.Location = new System.Drawing.Point(99, 31);
-            this.pbNetworkView.Margin = new System.Windows.Forms.Padding(2);
+            this.pbNetworkView.Margin = new System.Windows.Forms.Padding(3, 2, 3, 2);
             this.pbNetworkView.Name = "pbNetworkView";
-            this.pbNetworkView.Size = new System.Drawing.Size(366, 300);
+            this.pbNetworkView.Size = new System.Drawing.Size(487, 369);
             this.pbNetworkView.TabIndex = 1;
             this.pbNetworkView.TabStop = false;
             this.pbNetworkView.DoubleClick += new System.EventHandler(this.pbNetworkView_DoubleClick);
@@ -441,10 +444,10 @@
             // btnHelp
             // 
             this.btnHelp.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
-            this.btnHelp.Location = new System.Drawing.Point(2, 27);
+            this.btnHelp.Location = new System.Drawing.Point(3, 33);
-            this.btnHelp.Margin = new System.Windows.Forms.Padding(2);
+            this.btnHelp.Margin = new System.Windows.Forms.Padding(3, 2, 3, 2);
             this.btnHelp.Name = "btnHelp";
-            this.btnHelp.Size = new System.Drawing.Size(21, 20);
+            this.btnHelp.Size = new System.Drawing.Size(28, 25);
             this.btnHelp.TabIndex = 5;
             this.btnHelp.Text = "?";
             this.btnHelp.UseVisualStyleBackColor = true;
@@ -454,8 +457,8 @@
             // 
             this.rbHelp4.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
             this.rbHelp4.AutoSize = true;
-            this.rbHelp4.Location = new System.Drawing.Point(5, 53);
+            this.rbHelp4.Location = new System.Drawing.Point(13, 65);
-            this.rbHelp4.Margin = new System.Windows.Forms.Padding(2);
+            this.rbHelp4.Margin = new System.Windows.Forms.Padding(3, 2, 3, 2);
             this.rbHelp4.Name = "rbHelp4";
             this.rbHelp4.Size = new System.Drawing.Size(17, 16);
             this.rbHelp4.TabIndex = 6;
@@ -466,8 +469,8 @@
             // 
             this.rbHelp3.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
             this.rbHelp3.AutoSize = true;
-            this.rbHelp3.Location = new System.Drawing.Point(5, 69);
+            this.rbHelp3.Location = new System.Drawing.Point(13, 85);
-            this.rbHelp3.Margin = new System.Windows.Forms.Padding(2);
+            this.rbHelp3.Margin = new System.Windows.Forms.Padding(3, 2, 3, 2);
             this.rbHelp3.Name = "rbHelp3";
             this.rbHelp3.Size = new System.Drawing.Size(17, 16);
             this.rbHelp3.TabIndex = 7;
@@ -478,8 +481,8 @@
             // 
             this.rbHelp2.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
             this.rbHelp2.AutoSize = true;
-            this.rbHelp2.Location = new System.Drawing.Point(5, 87);
+            this.rbHelp2.Location = new System.Drawing.Point(13, 107);
-            this.rbHelp2.Margin = new System.Windows.Forms.Padding(2);
+            this.rbHelp2.Margin = new System.Windows.Forms.Padding(3, 2, 3, 2);
             this.rbHelp2.Name = "rbHelp2";
             this.rbHelp2.Size = new System.Drawing.Size(17, 16);
             this.rbHelp2.TabIndex = 8;
@@ -491,8 +494,8 @@
             this.rbHelp1.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
             this.rbHelp1.AutoSize = true;
             this.rbHelp1.Checked = true;
-            this.rbHelp1.Location = new System.Drawing.Point(5, 105);
+            this.rbHelp1.Location = new System.Drawing.Point(13, 129);
-            this.rbHelp1.Margin = new System.Windows.Forms.Padding(2);
+            this.rbHelp1.Margin = new System.Windows.Forms.Padding(3, 2, 3, 2);
             this.rbHelp1.Name = "rbHelp1";
             this.rbHelp1.Size = new System.Drawing.Size(17, 16);
             this.rbHelp1.TabIndex = 9;
@@ -509,16 +512,17 @@
             this.HelpPanel.Controls.Add(this.rbHelp1);
             this.HelpPanel.Controls.Add(this.rbHelp3);
             this.HelpPanel.Controls.Add(this.rbHelp2);
-            this.HelpPanel.Location = new System.Drawing.Point(438, 25);
+            this.HelpPanel.Location = new System.Drawing.Point(584, 31);
-            this.HelpPanel.Margin = new System.Windows.Forms.Padding(2);
+            this.HelpPanel.Margin = new System.Windows.Forms.Padding(3, 2, 3, 2);
             this.HelpPanel.Name = "HelpPanel";
-            this.HelpPanel.Size = new System.Drawing.Size(25, 300);
+            this.HelpPanel.Size = new System.Drawing.Size(33, 369);
             this.HelpPanel.TabIndex = 10;
             // 
             // cbViewTitles
             // 
             this.cbViewTitles.AutoSize = true;
-            this.cbViewTitles.Location = new System.Drawing.Point(5, 7);
+            this.cbViewTitles.Location = new System.Drawing.Point(7, 9);
+            this.cbViewTitles.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
             this.cbViewTitles.Name = "cbViewTitles";
             this.cbViewTitles.Size = new System.Drawing.Size(18, 17);
             this.cbViewTitles.TabIndex = 10;
@@ -528,18 +532,32 @@
             // myProgressBar
             // 
             this.myProgressBar.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));
-            this.myProgressBar.Location = new System.Drawing.Point(10, 329);
+            this.myProgressBar.Location = new System.Drawing.Point(13, 405);
-            this.myProgressBar.Margin = new System.Windows.Forms.Padding(2);
+            this.myProgressBar.Margin = new System.Windows.Forms.Padding(3, 2, 3, 2);
             this.myProgressBar.Name = "myProgressBar";
-            this.myProgressBar.Size = new System.Drawing.Size(59, 19);
+            this.myProgressBar.Size = new System.Drawing.Size(79, 23);
             this.myProgressBar.Style = System.Windows.Forms.ProgressBarStyle.Continuous;
             this.myProgressBar.TabIndex = 11;
             // 
+            // VLANToolStripMenuItem
+            // 
+            this.VLANToolStripMenuItem.Name = "VLANToolStripMenuItem";
+            this.VLANToolStripMenuItem.Size = new System.Drawing.Size(187, 26);
+            this.VLANToolStripMenuItem.Text = "VLAN";
+            this.VLANToolStripMenuItem.Click += new System.EventHandler(this.VLANToolStripMenuItem_Click);
+            // 
+            // SolvedVLANToolStripMenuItem1
+            // 
+            this.SolvedVLANToolStripMenuItem1.Name = "SolvedVLANToolStripMenuItem1";
+            this.SolvedVLANToolStripMenuItem1.Size = new System.Drawing.Size(187, 26);
+            this.SolvedVLANToolStripMenuItem1.Text = "VLAN";
+            this.SolvedVLANToolStripMenuItem1.Click += new System.EventHandler(this.SolvedVLANToolStripMenuItem1_Click);
+            // 
             // BuilderWindow
             // 
-            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
+            this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 16F);
             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
-            this.ClientSize = new System.Drawing.Size(463, 412);
+            this.ClientSize = new System.Drawing.Size(617, 507);
             this.Controls.Add(this.myProgressBar);
             this.Controls.Add(this.lblStatus);
             this.Controls.Add(this.lbMessages);
@@ -549,7 +567,7 @@
             this.Controls.Add(this.HelpPanel);
             this.Icon = global::EduNetworkBuilder.Properties.Resources.NBIco;
             this.MainMenuStrip = this.msMainMenuStrip;
-            this.Margin = new System.Windows.Forms.Padding(2);
+            this.Margin = new System.Windows.Forms.Padding(3, 2, 3, 2);
             this.Name = "BuilderWindow";
             this.Text = "Network Builder";
             this.FormClosing += new System.Windows.Forms.FormClosingEventHandler(this.BuilderWindow_FormClosing);
@@ -618,6 +636,8 @@
         private System.Windows.Forms.ProgressBar myProgressBar;
         private System.Windows.Forms.ToolStripMenuItem changeLanguageToolStripMenuItem;
         private System.Windows.Forms.CheckBox cbViewTitles;
+        private System.Windows.Forms.ToolStripMenuItem VLANToolStripMenuItem;
+        private System.Windows.Forms.ToolStripMenuItem SolvedVLANToolStripMenuItem1;
     }
 }
 

EduNetworkBuilder/NetworkBuilder.cs

@@ -1207,6 +1207,21 @@ namespace EduNetworkBuilder
             UpdateMessages();
         }
 
+
+        private void VLANToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            LoadNetworkFromResource("VLAN");
+            UpdateMessages();
+        }
+
+        private void SolvedVLANToolStripMenuItem1_Click(object sender, EventArgs e)
+        {
+            LoadNetworkFromResource("VLAN");
+            myNetwork.DoAllClearIPs();
+            UpdateMessages();
+            UpdateVisuals();
+        }
+
         private void threeNetworksToolStripMenuItem_Click(object sender, EventArgs e)
         {
             LoadNetworkFromResource("ThreeNets");
@@ -1377,5 +1392,6 @@ namespace EduNetworkBuilder
                 UpdateVisuals();
             }
         }
+        
     }
 }

EduNetworkBuilder/NetworkCard.cs

@@ -464,11 +464,15 @@ namespace EduNetworkBuilder
                 case NicType.eth:
                 case NicType.wlan:
                     //see if it the packet dest is local to this nic
+                    if (tPacket.MyType == PacketType.dhcp_answer)
+                        Console.WriteLine("DHCP Answer");                    
                     foreach (NetworkInterface nf in interfaces.ToList())
                     {
                         if (tPacket.InboundNic != null && tPacket.InboundNic == this &&
                             tPacket.InboundInterface != null && tPacket.InboundInterface == nf)
                             continue; //skip sending it out this interface if it came in this interface.
+                        if (tPacket.MyType == PacketType.dhcp_answer && tPacket.isFresh && tPacket.payloadIP != null && !nf.isLocal(tPacket.payloadIP))
+                            continue; //If it is a dhcp broadcast, only send it out the interface it belongs to
                         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

EduNetworkBuilder/NetworkDevice.cs

@@ -1498,8 +1498,8 @@ namespace EduNetworkBuilder
                             if (BroadcastMatch && tPacket.MyType != PacketType.dhcp_answer)
                                 tPacket.OutboundDestMAC = NB.BroadcastMACString;
                             tPacket.destMAC = tPacket.OutboundDestMAC;
-                            //wearehere; //set the vlan id to 1 probably so we adopt the outgoing vlan
+
-                            if(nic.SendPacketOutNIC(tPacket))
+                            if (nic.SendPacketOutNIC(tPacket))
                             {
                                 count++;
                                 if (nic.GetNicType == NicType.wan)
@@ -1821,12 +1821,14 @@ namespace EduNetworkBuilder
                 if (tPacket.InboundInterface == null)
                 {
                     dst = RequestDHCPLease(tPacket.sourceMAC, tPacket.OutboundIP);
+                    nPacket.OutboundIP = tPacket.OutboundIP;
                 }
                 else
                 {
                     dst = RequestDHCPLease(tPacket.sourceMAC, tPacket.InboundInterface.myIP);
+                    nPacket.OutboundIP = tPacket.InboundInterface.myIP;
                 }
-                //if we the packet came in on a port...
+                //if the packet came in on a port...
                 if (tPacket.InboundNic != null && (tPacket.InboundNic.GetNicType == NicType.wport || tPacket.InboundNic.GetNicType == NicType.port))
                 {
                     IPAddress theIP = HubManagementIP();
@@ -2647,8 +2649,13 @@ namespace EduNetworkBuilder
             }
             foreach(ArpEntry dhcp in DHCPLeases)
             {
+
                 if (dhcp.MACAddress == MAC && dhcp.IPAddr != NB.ZeroIPString && NIC_IP != null && gateway != null)
-                    return new IPAddress(dhcp.IPAddr, NIC_IP.GetMask.ToIpString(), gateway.GetIP.ToIpString());
+                {
+                    IPAddress addr = new IPAddress(dhcp.IPAddr, NIC_IP.GetMask.ToIpString(), gateway.GetIP.ToIpString());
+                    if (addr.IsLocal(NIC_IP))
+                        return addr;
+                }
             }
             return null;
         }
@@ -2680,7 +2687,8 @@ namespace EduNetworkBuilder
             if (NIC_IP == null)
                 NIC_IP = HubManagementIP();
             IPAddress tAddress = LookupDHCPLease(MAC, NIC_IP);
-            if (tAddress != null) return tAddress;
+            if (tAddress != null && NIC_IP.IsLocal(tAddress))
+                return tAddress;
 
             //if we are here, we need to find an address to give.
             bool stillOK = true;

EduNetworkBuilder/NetworkInterface.cs

@@ -191,6 +191,7 @@ namespace EduNetworkBuilder
             VLANTagType What = VI.Tag;
             Network theNet = NB.GetNetwork();
             NetworkDevice HD = theNet.GetDeviceFromID(AttachedToHostNic);
+            if (HD == null) return; //Oops!  Something went wrong.
             string hostname = HD.hostname;
 
             if (What == VLANTagType.Forbidden)
@@ -321,6 +322,7 @@ namespace EduNetworkBuilder
                 VLANTagType What = VI.Tag;
                 Network theNet = NB.GetNetwork();
                 NetworkDevice HD = theNet.GetDeviceFromID(AttachedToHostNic);
+                if (HD == null) return;
                 string hostname = HD.hostname;
 
                 if (What == VLANTagType.Forbidden)

EduNetworkBuilder/Packet.cs

@@ -231,8 +231,24 @@ namespace EduNetworkBuilder
                     pencolor = Color.Orange;
                     break;
             }
-            Pen myPen = new Pen(pencolor, NB.PacketPixelSize);
+            Network theNet = NB.GetNetwork();
-            Graphics.FromImage(BaseImage).DrawEllipse(myPen, PacketRectangle());
+            if (theNet == null)
+            {
+                Pen myPen = new Pen(pencolor, NB.PacketPixelSize);
+                Graphics.FromImage(BaseImage).DrawEllipse(myPen, PacketRectangle());
+            }
+            else
+            {
+                Color VLANPacketColor = theNet.ColorFromPacketVLAN(VLANID);
+                if (VLANPacketColor != Color.Blue)
+                    pencolor = VLANPacketColor;
+                Image tImage = theNet.GetPacketImage(pencolor);
+                //if (VLANPacketColor != Color.Blue && VLANPacketColor != Color.Empty)
+                //{
+                //    tImage = theNet.ColoredImage(tImage, VLANPacketColor);
+                //}
+                Graphics.FromImage(BaseImage).DrawImage(tImage, PacketRectangle());                
+            }
         }
 
         /// <summary>

EduNetworkBuilder/Properties/Resources.Designer.cs

@@ -142,7 +142,7 @@ namespace EduNetworkBuilder.Properties {
         /// <summary>
         ///   Looks up a localized string similar to {\rtf1\ansi\ansicpg1252\deff0\nouicompat\deflang1033\deflangfe1033{\fonttbl{\f0\fswiss\fprq2\fcharset0 Calibri;}{\f1\fnil\fcharset0 Calibri;}{\f2\fmodern\fprq1\fcharset0 Courier New;}{\f3\fmodern\fprq1\fcharset0 Consolas;}}
         ///{\colortbl ;\red0\green0\blue255;}
-        ///{\*\generator Riched20 10.0.10240}{\*\mmathPr\mdispDef1\mwrapIndent1440 }\viewkind4\uc1 
+        ///{\*\generator Riched20 10.0.14393}{\*\mmathPr\mdispDef1\mwrapIndent1440 }\viewkind4\uc1 
         ///\pard\widctlpar\sa200\sl276\slmult1\b\f0\fs22\lang9 Help:\b0\par
         ///This is a basic help document for EduNetworkBuilder.  You can get to this by going to &quot;Help&quot; -&gt; [rest of string was truncated]&quot;;.
         /// </summary>
@@ -772,6 +772,66 @@ namespace EduNetworkBuilder.Properties {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized resource of type System.Byte[].
+        /// </summary>
+        internal static byte[] Level6_ForbiddenVLAN {
+            get {
+                object obj = ResourceManager.GetObject("Level6_ForbiddenVLAN", resourceCulture);
+                return ((byte[])(obj));
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized resource of type System.Byte[].
+        /// </summary>
+        internal static byte[] Level6_TaggedBetweenSwitches {
+            get {
+                object obj = ResourceManager.GetObject("Level6_TaggedBetweenSwitches", resourceCulture);
+                return ((byte[])(obj));
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized resource of type System.Byte[].
+        /// </summary>
+        internal static byte[] Level6_VLAN_Intro {
+            get {
+                object obj = ResourceManager.GetObject("Level6_VLAN_Intro", resourceCulture);
+                return ((byte[])(obj));
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized resource of type System.Byte[].
+        /// </summary>
+        internal static byte[] Level6_VLAN_Intro2 {
+            get {
+                object obj = ResourceManager.GetObject("Level6_VLAN_Intro2", resourceCulture);
+                return ((byte[])(obj));
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized resource of type System.Byte[].
+        /// </summary>
+        internal static byte[] Level6_VLANRouting {
+            get {
+                object obj = ResourceManager.GetObject("Level6_VLANRouting", resourceCulture);
+                return ((byte[])(obj));
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized resource of type System.Byte[].
+        /// </summary>
+        internal static byte[] Level6_VLANRouting2 {
+            get {
+                object obj = ResourceManager.GetObject("Level6_VLANRouting2", resourceCulture);
+                return ((byte[])(obj));
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized resource of type System.Drawing.Bitmap.
         /// </summary>
@@ -842,8 +902,14 @@ namespace EduNetworkBuilder.Properties {
         }
         
         /// <summary>
-        ///   Looks up a localized string similar to {\rtf1\adeflang1025\ansi\ansicpg1252\uc1\adeff31507\deff0\stshfdbch31505\stshfloch31506\stshfhich31506\stshfbi31507\deflang1033\deflangfe1033\themelang1033\themelangfe0\themelangcs0{\fonttbl{\f0\fbidi \froman\fcharset0\fprq2{\*\panose 02020603050405020304}Times New Roman;}{\f34\fbidi \froman\fcharset1\fprq2{\*\panose 02040503050406030204}Cambria Math;}
+        ///   Looks up a localized string similar to {\rtf1\ansi\ansicpg1252\deff0\nouicompat\deflang1033\deflangfe1033{\fonttbl{\f0\fswiss\fprq2\fcharset0 Calibri;}}
-        ///{\f39\fbidi \fswiss\fcharset0\fprq2{\*\panose 020f0502020204030204}Calibri;}{\flomajor\f31500\fbidi \froman\fcharset0\fprq2{\*\panose 02020603050405020304}T [rest of string was truncated]&quot;;.
+        ///{\*\generator Riched20 10.0.10586}{\*\mmathPr\mdispDef1\mwrapIndent1440 }\viewkind4\uc1 
+        ///\pard\nowidctlpar\sa200\sl276\slmult1\b\f0\fs22\lang9 Version 1.0.27\par
+        ///\b0 * Made distribution easier by CD (does updates from web, but we also have a downloadable zip you can install from)\par
+        ///\b Version 1.0.26\par
+        ///\b0 * Major graphics overhaul\par
+        ///  - Packets move on timer\par
+        ///  - Graphics drawn &quot; [rest of string was truncated]&quot;;.
         /// </summary>
         internal static string ReleaseNotes {
             get {
@@ -921,6 +987,16 @@ namespace EduNetworkBuilder.Properties {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized resource of type System.Byte[].
+        /// </summary>
+        internal static byte[] VLAN {
+            get {
+                object obj = ResourceManager.GetObject("VLAN", resourceCulture);
+                return ((byte[])(obj));
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized resource of type System.Drawing.Bitmap.
         /// </summary>

EduNetworkBuilder/Properties/Resources.resx

@@ -391,4 +391,25 @@
   <data name="Level1_AddingDevices" type="System.Resources.ResXFileRef, System.Windows.Forms">
     <value>..\Resources\Level1_AddingDevices.enbx;System.Byte[], mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </data>
+  <data name="Level6_ForbiddenVLAN" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\Level6_ForbiddenVLAN.enbx;System.Byte[], mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </data>
+  <data name="Level6_TaggedBetweenSwitches" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\Level6_TaggedBetweenSwitches.enbx;System.Byte[], mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </data>
+  <data name="Level6_VLANRouting" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\Level6_VLANRouting.enbx;System.Byte[], mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </data>
+  <data name="Level6_VLANRouting2" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\Level6_VLANRouting2.enbx;System.Byte[], mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </data>
+  <data name="Level6_VLAN_Intro" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\Level6_VLAN_Intro.enbx;System.Byte[], mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </data>
+  <data name="Level6_VLAN_Intro2" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\Level6_VLAN_Intro2.enbx;System.Byte[], mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </data>
+  <data name="VLAN" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\VLAN.enbx;System.Byte[], mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </data>
 </root>

EduNetworkBuilder/Resources/Level6_ForbiddenVLAN.enbx

@@ -0,0 +1,641 @@
+<?xml version="1.0" encoding="utf-8"?>
+<EduNetworkBuilder>
+  <!--This is a network file for EduNetworkBuilder.-->
+  <Network>
+    <en_message>Vlans are managed by double-clicking the networking device (the switch, for this puzzle), and clicking on the VLANs button.  A VLAN has three states, tagged, untagged, and forbidden.  Forbidden means it does not work.  To fix this puzzle, change the switch VLAN ports to "untagged" for all of the, and then ping the other PC</en_message>
+    <en_title>Forbidden VLANs</en_title>
+    <height>1024</height>
+    <width>1024</width>
+    <itemsize>100</itemsize>
+    <showlabels>False</showlabels>
+    <level>6</level>
+    <sortorder>1</sortorder>
+    <uniqueidentifier>130</uniqueidentifier>
+    <startinghelplevel>full</startinghelplevel>
+    <vlansenabled>True</vlansenabled>
+    <device>
+      <hostname>laptop0</hostname>
+      <size>100</size>
+      <uniqueidentifier>103</uniqueidentifier>
+      <location>559,560</location>
+      <mytype>laptop</mytype>
+      <isdns>False</isdns>
+      <isdhcp>False</isdhcp>
+      <gateway>
+        <ip>192.168.1.1</ip>
+        <mask>255.255.255.0</mask>
+        <gateway>0.0.0.0</gateway>
+        <type>gw</type>
+      </gateway>
+      <nic>
+        <nictype>lo</nictype>
+        <nicname>lo0</nicname>
+        <myid>
+          <hostid>103</hostid>
+          <nicid>104</nicid>
+          <hostname>laptop0</hostname>
+          <nicname>lo0</nicname>
+        </myid>
+        <nictype>lo</nictype>
+        <uniqueidentifier>104</uniqueidentifier>
+        <usesdhcp>False</usesdhcp>
+        <encryptionkey />
+        <ssid />
+        <interface>
+          <nicname>lo0</nicname>
+          <myip>
+            <ip>127.0.0.1</ip>
+            <mask>255.0.0.0</mask>
+            <gateway>0.0.0.0</gateway>
+            <type>ip</type>
+          </myip>
+          <VLAN
+            ID="1">Untagged</VLAN>
+        </interface>
+      </nic>
+      <nic>
+        <nictype>eth</nictype>
+        <nicname>eth0</nicname>
+        <myid>
+          <hostid>103</hostid>
+          <nicid>105</nicid>
+          <hostname>laptop0</hostname>
+          <nicname>eth0</nicname>
+        </myid>
+        <nictype>eth</nictype>
+        <uniqueidentifier>105</uniqueidentifier>
+        <usesdhcp>False</usesdhcp>
+        <encryptionkey />
+        <ssid />
+        <interface>
+          <nicname>eth0</nicname>
+          <myip>
+            <ip>192.168.1.3</ip>
+            <mask>255.255.255.0</mask>
+            <gateway>0.0.0.0</gateway>
+            <type>ip</type>
+          </myip>
+          <VLAN
+            ID="1">Untagged</VLAN>
+        </interface>
+      </nic>
+    </device>
+    <device>
+      <hostname>laptop1</hostname>
+      <size>100</size>
+      <uniqueidentifier>123</uniqueidentifier>
+      <location>680,147</location>
+      <mytype>laptop</mytype>
+      <isdns>False</isdns>
+      <isdhcp>False</isdhcp>
+      <gateway>
+        <ip>192.168.2.1</ip>
+        <mask>255.255.255.0</mask>
+        <gateway>0.0.0.0</gateway>
+        <type>gw</type>
+      </gateway>
+      <nic>
+        <nictype>lo</nictype>
+        <nicname>lo0</nicname>
+        <myid>
+          <hostid>123</hostid>
+          <nicid>124</nicid>
+          <hostname>laptop1</hostname>
+          <nicname>lo0</nicname>
+        </myid>
+        <nictype>lo</nictype>
+        <uniqueidentifier>124</uniqueidentifier>
+        <usesdhcp>False</usesdhcp>
+        <encryptionkey />
+        <ssid />
+        <interface>
+          <nicname>lo0</nicname>
+          <myip>
+            <ip>127.0.0.1</ip>
+            <mask>255.0.0.0</mask>
+            <gateway>0.0.0.0</gateway>
+            <type>ip</type>
+          </myip>
+          <VLAN
+            ID="1">Untagged</VLAN>
+        </interface>
+      </nic>
+      <nic>
+        <nictype>eth</nictype>
+        <nicname>eth0</nicname>
+        <myid>
+          <hostid>123</hostid>
+          <nicid>125</nicid>
+          <hostname>laptop1</hostname>
+          <nicname>eth0</nicname>
+        </myid>
+        <nictype>eth</nictype>
+        <uniqueidentifier>125</uniqueidentifier>
+        <usesdhcp>False</usesdhcp>
+        <encryptionkey />
+        <ssid />
+        <interface>
+          <nicname>eth0</nicname>
+          <myip>
+            <ip>192.168.2.2</ip>
+            <mask>255.255.255.0</mask>
+            <gateway>0.0.0.0</gateway>
+            <type>ip</type>
+          </myip>
+          <VLAN
+            ID="1">Untagged</VLAN>
+        </interface>
+      </nic>
+    </device>
+    <device>
+      <hostname>net_switch0</hostname>
+      <size>100</size>
+      <uniqueidentifier>109</uniqueidentifier>
+      <location>406,328</location>
+      <mytype>net_switch</mytype>
+      <isdns>False</isdns>
+      <isdhcp>False</isdhcp>
+      <gateway>
+        <ip>192.168.1.1</ip>
+        <mask>255.255.255.0</mask>
+        <gateway>0.0.0.0</gateway>
+        <type>gw</type>
+      </gateway>
+      <nic>
+        <nictype>lo</nictype>
+        <nicname>lo0</nicname>
+        <myid>
+          <hostid>109</hostid>
+          <nicid>110</nicid>
+          <hostname>net_switch0</hostname>
+          <nicname>lo0</nicname>
+        </myid>
+        <nictype>lo</nictype>
+        <uniqueidentifier>110</uniqueidentifier>
+        <usesdhcp>False</usesdhcp>
+        <encryptionkey />
+        <ssid />
+        <interface>
+          <nicname>lo0</nicname>
+          <myip>
+            <ip>127.0.0.1</ip>
+            <mask>255.0.0.0</mask>
+            <gateway>0.0.0.0</gateway>
+            <type>ip</type>
+          </myip>
+          <VLAN
+            ID="1">Untagged</VLAN>
+        </interface>
+      </nic>
+      <nic>
+        <nictype>management_interface</nictype>
+        <nicname>management_interface0</nicname>
+        <myid>
+          <hostid>109</hostid>
+          <nicid>111</nicid>
+          <hostname>net_switch0</hostname>
+          <nicname>management_interface0</nicname>
+        </myid>
+        <nictype>management_interface</nictype>
+        <uniqueidentifier>111</uniqueidentifier>
+        <usesdhcp>False</usesdhcp>
+        <encryptionkey />
+        <ssid />
+        <interface>
+          <nicname>management_interface0</nicname>
+          <myip>
+            <ip>192.168.1.4</ip>
+            <mask>255.255.255.0</mask>
+            <gateway>0.0.0.0</gateway>
+            <type>ip</type>
+          </myip>
+          <VLAN
+            ID="1">Untagged</VLAN>
+        </interface>
+      </nic>
+      <nic>
+        <nictype>port</nictype>
+        <nicname>port1</nicname>
+        <myid>
+          <hostid>109</hostid>
+          <nicid>112</nicid>
+          <hostname>net_switch0</hostname>
+          <nicname>port1</nicname>
+        </myid>
+        <nictype>port</nictype>
+        <uniqueidentifier>112</uniqueidentifier>
+        <usesdhcp>False</usesdhcp>
+        <encryptionkey />
+        <ssid />
+        <interface>
+          <nicname>port1</nicname>
+          <myip>
+            <ip>0.0.0.0</ip>
+            <mask>0.0.0.0</mask>
+            <gateway>0.0.0.0</gateway>
+            <type>ip</type>
+          </myip>
+          <VLAN
+            ID="1">Forbidden</VLAN>
+        </interface>
+      </nic>
+      <nic>
+        <nictype>port</nictype>
+        <nicname>port2</nicname>
+        <myid>
+          <hostid>109</hostid>
+          <nicid>113</nicid>
+          <hostname>net_switch0</hostname>
+          <nicname>port2</nicname>
+        </myid>
+        <nictype>port</nictype>
+        <uniqueidentifier>113</uniqueidentifier>
+        <usesdhcp>False</usesdhcp>
+        <encryptionkey />
+        <ssid />
+        <interface>
+          <nicname>port2</nicname>
+          <myip>
+            <ip>0.0.0.0</ip>
+            <mask>0.0.0.0</mask>
+            <gateway>0.0.0.0</gateway>
+            <type>ip</type>
+          </myip>
+          <VLAN
+            ID="1">Forbidden</VLAN>
+        </interface>
+      </nic>
+      <nic>
+        <nictype>port</nictype>
+        <nicname>port3</nicname>
+        <myid>
+          <hostid>109</hostid>
+          <nicid>114</nicid>
+          <hostname>net_switch0</hostname>
+          <nicname>port3</nicname>
+        </myid>
+        <nictype>port</nictype>
+        <uniqueidentifier>114</uniqueidentifier>
+        <usesdhcp>False</usesdhcp>
+        <encryptionkey />
+        <ssid />
+        <interface>
+          <nicname>port3</nicname>
+          <myip>
+            <ip>0.0.0.0</ip>
+            <mask>0.0.0.0</mask>
+            <gateway>0.0.0.0</gateway>
+            <type>ip</type>
+          </myip>
+          <VLAN
+            ID="1">Forbidden</VLAN>
+        </interface>
+      </nic>
+      <nic>
+        <nictype>port</nictype>
+        <nicname>port4</nicname>
+        <myid>
+          <hostid>109</hostid>
+          <nicid>115</nicid>
+          <hostname>net_switch0</hostname>
+          <nicname>port4</nicname>
+        </myid>
+        <nictype>port</nictype>
+        <uniqueidentifier>115</uniqueidentifier>
+        <usesdhcp>False</usesdhcp>
+        <encryptionkey />
+        <ssid />
+        <interface>
+          <nicname>port4</nicname>
+          <myip>
+            <ip>0.0.0.0</ip>
+            <mask>0.0.0.0</mask>
+            <gateway>0.0.0.0</gateway>
+            <type>ip</type>
+          </myip>
+          <VLAN
+            ID="1">Forbidden</VLAN>
+        </interface>
+      </nic>
+      <nic>
+        <nictype>port</nictype>
+        <nicname>port5</nicname>
+        <myid>
+          <hostid>109</hostid>
+          <nicid>116</nicid>
+          <hostname>net_switch0</hostname>
+          <nicname>port5</nicname>
+        </myid>
+        <nictype>port</nictype>
+        <uniqueidentifier>116</uniqueidentifier>
+        <usesdhcp>False</usesdhcp>
+        <encryptionkey />
+        <ssid />
+        <interface>
+          <nicname>port5</nicname>
+          <myip>
+            <ip>0.0.0.0</ip>
+            <mask>0.0.0.0</mask>
+            <gateway>0.0.0.0</gateway>
+            <type>ip</type>
+          </myip>
+          <VLAN
+            ID="1">Forbidden</VLAN>
+        </interface>
+      </nic>
+      <nic>
+        <nictype>port</nictype>
+        <nicname>port6</nicname>
+        <myid>
+          <hostid>109</hostid>
+          <nicid>117</nicid>
+          <hostname>net_switch0</hostname>
+          <nicname>port6</nicname>
+        </myid>
+        <nictype>port</nictype>
+        <uniqueidentifier>117</uniqueidentifier>
+        <usesdhcp>False</usesdhcp>
+        <encryptionkey />
+        <ssid />
+        <interface>
+          <nicname>port6</nicname>
+          <myip>
+            <ip>0.0.0.0</ip>
+            <mask>0.0.0.0</mask>
+            <gateway>0.0.0.0</gateway>
+            <type>ip</type>
+          </myip>
+          <VLAN
+            ID="1">Forbidden</VLAN>
+        </interface>
+      </nic>
+      <nic>
+        <nictype>port</nictype>
+        <nicname>port7</nicname>
+        <myid>
+          <hostid>109</hostid>
+          <nicid>118</nicid>
+          <hostname>net_switch0</hostname>
+          <nicname>port7</nicname>
+        </myid>
+        <nictype>port</nictype>
+        <uniqueidentifier>118</uniqueidentifier>
+        <usesdhcp>False</usesdhcp>
+        <encryptionkey />
+        <ssid />
+        <interface>
+          <nicname>port7</nicname>
+          <myip>
+            <ip>0.0.0.0</ip>
+            <mask>0.0.0.0</mask>
+            <gateway>0.0.0.0</gateway>
+            <type>ip</type>
+          </myip>
+          <VLAN
+            ID="1">Forbidden</VLAN>
+        </interface>
+      </nic>
+    </device>
+    <device>
+      <hostname>pc0</hostname>
+      <size>100</size>
+      <uniqueidentifier>100</uniqueidentifier>
+      <location>246,560</location>
+      <mytype>pc</mytype>
+      <isdns>False</isdns>
+      <isdhcp>False</isdhcp>
+      <gateway>
+        <ip>192.168.1.1</ip>
+        <mask>255.255.255.0</mask>
+        <gateway>0.0.0.0</gateway>
+        <type>gw</type>
+      </gateway>
+      <nic>
+        <nictype>lo</nictype>
+        <nicname>lo0</nicname>
+        <myid>
+          <hostid>100</hostid>
+          <nicid>101</nicid>
+          <hostname>pc0</hostname>
+          <nicname>lo0</nicname>
+        </myid>
+        <nictype>lo</nictype>
+        <uniqueidentifier>101</uniqueidentifier>
+        <usesdhcp>False</usesdhcp>
+        <encryptionkey />
+        <ssid />
+        <interface>
+          <nicname>lo0</nicname>
+          <myip>
+            <ip>127.0.0.1</ip>
+            <mask>255.0.0.0</mask>
+            <gateway>0.0.0.0</gateway>
+            <type>ip</type>
+          </myip>
+          <VLAN
+            ID="1">Untagged</VLAN>
+        </interface>
+      </nic>
+      <nic>
+        <nictype>eth</nictype>
+        <nicname>eth0</nicname>
+        <myid>
+          <hostid>100</hostid>
+          <nicid>102</nicid>
+          <hostname>pc0</hostname>
+          <nicname>eth0</nicname>
+        </myid>
+        <nictype>eth</nictype>
+        <uniqueidentifier>102</uniqueidentifier>
+        <usesdhcp>False</usesdhcp>
+        <encryptionkey />
+        <ssid />
+        <interface>
+          <nicname>eth0</nicname>
+          <myip>
+            <ip>192.168.1.2</ip>
+            <mask>255.255.255.0</mask>
+            <gateway>0.0.0.0</gateway>
+            <type>ip</type>
+          </myip>
+          <VLAN
+            ID="1">Untagged</VLAN>
+        </interface>
+      </nic>
+    </device>
+    <device>
+      <hostname>router0</hostname>
+      <size>100</size>
+      <uniqueidentifier>119</uniqueidentifier>
+      <location>400,158</location>
+      <mytype>router</mytype>
+      <isdns>False</isdns>
+      <isdhcp>False</isdhcp>
+      <gateway>
+        <ip>0.0.0.0</ip>
+        <mask>0.0.0.0</mask>
+        <gateway>0.0.0.0</gateway>
+        <type>gw</type>
+      </gateway>
+      <nic>
+        <nictype>lo</nictype>
+        <nicname>lo0</nicname>
+        <myid>
+          <hostid>119</hostid>
+          <nicid>120</nicid>
+          <hostname>router0</hostname>
+          <nicname>lo0</nicname>
+        </myid>
+        <nictype>lo</nictype>
+        <uniqueidentifier>120</uniqueidentifier>
+        <usesdhcp>False</usesdhcp>
+        <encryptionkey />
+        <ssid />
+        <interface>
+          <nicname>lo0</nicname>
+          <myip>
+            <ip>127.0.0.1</ip>
+            <mask>255.0.0.0</mask>
+            <gateway>0.0.0.0</gateway>
+            <type>ip</type>
+          </myip>
+          <VLAN
+            ID="1">Untagged</VLAN>
+        </interface>
+      </nic>
+      <nic>
+        <nictype>eth</nictype>
+        <nicname>eth0</nicname>
+        <myid>
+          <hostid>119</hostid>
+          <nicid>121</nicid>
+          <hostname>router0</hostname>
+          <nicname>eth0</nicname>
+        </myid>
+        <nictype>eth</nictype>
+        <uniqueidentifier>121</uniqueidentifier>
+        <usesdhcp>False</usesdhcp>
+        <encryptionkey />
+        <ssid />
+        <interface>
+          <nicname>eth0</nicname>
+          <myip>
+            <ip>192.168.1.1</ip>
+            <mask>255.255.255.0</mask>
+            <gateway>0.0.0.0</gateway>
+            <type>ip</type>
+          </myip>
+          <VLAN
+            ID="1">Untagged</VLAN>
+        </interface>
+      </nic>
+      <nic>
+        <nictype>eth</nictype>
+        <nicname>eth1</nicname>
+        <myid>
+          <hostid>119</hostid>
+          <nicid>122</nicid>
+          <hostname>router0</hostname>
+          <nicname>eth1</nicname>
+        </myid>
+        <nictype>eth</nictype>
+        <uniqueidentifier>122</uniqueidentifier>
+        <usesdhcp>False</usesdhcp>
+        <encryptionkey />
+        <ssid />
+        <interface>
+          <nicname>eth1</nicname>
+          <myip>
+            <ip>192.168.2.1</ip>
+            <mask>255.255.255.0</mask>
+            <gateway>0.0.0.0</gateway>
+            <type>ip</type>
+          </myip>
+          <VLAN
+            ID="1">Untagged</VLAN>
+        </interface>
+      </nic>
+    </device>
+    <link>
+      <SrcNic>
+        <hostid>100</hostid>
+        <nicid>102</nicid>
+        <hostname>pc0</hostname>
+        <nicname>eth0</nicname>
+      </SrcNic>
+      <DstNic>
+        <hostid>109</hostid>
+        <nicid>112</nicid>
+        <hostname>net_switch0</hostname>
+        <nicname>port1</nicname>
+      </DstNic>
+      <hostname />
+      <linktype>normal</linktype>
+      <uniqueidentifier>126</uniqueidentifier>
+    </link>
+    <link>
+      <SrcNic>
+        <hostid>103</hostid>
+        <nicid>105</nicid>
+        <hostname>laptop0</hostname>
+        <nicname>eth0</nicname>
+      </SrcNic>
+      <DstNic>
+        <hostid>109</hostid>
+        <nicid>113</nicid>
+        <hostname>net_switch0</hostname>
+        <nicname>port2</nicname>
+      </DstNic>
+      <hostname />
+      <linktype>normal</linktype>
+      <uniqueidentifier>127</uniqueidentifier>
+    </link>
+    <link>
+      <SrcNic>
+        <hostid>109</hostid>
+        <nicid>114</nicid>
+        <hostname>net_switch0</hostname>
+        <nicname>port3</nicname>
+      </SrcNic>
+      <DstNic>
+        <hostid>119</hostid>
+        <nicid>121</nicid>
+        <hostname>router0</hostname>
+        <nicname>eth0</nicname>
+      </DstNic>
+      <hostname />
+      <linktype>normal</linktype>
+      <uniqueidentifier>128</uniqueidentifier>
+    </link>
+    <link>
+      <SrcNic>
+        <hostid>119</hostid>
+        <nicid>122</nicid>
+        <hostname>router0</hostname>
+        <nicname>eth1</nicname>
+      </SrcNic>
+      <DstNic>
+        <hostid>123</hostid>
+        <nicid>125</nicid>
+        <hostname>laptop1</hostname>
+        <nicname>eth0</nicname>
+      </DstNic>
+      <hostname />
+      <linktype>normal</linktype>
+      <uniqueidentifier>129</uniqueidentifier>
+    </link>
+    <nettest>
+      <shost>pc0</shost>
+      <dhost>laptop0</dhost>
+      <thetest>SuccessfullyPings</thetest>
+    </nettest>
+    <nettest>
+      <shost>All</shost>
+      <dhost>All</dhost>
+      <thetest>LockVLANNames</thetest>
+    </nettest>
+    <tag>VLAN</tag>
+    <VLANName
+      ID="1">Default</VLANName>
+  </Network>
+</EduNetworkBuilder>

EduNetworkBuilder/VLANStuff.cs

@@ -4,7 +4,7 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using System.ComponentModel;
-
+using System.Drawing;
 
 namespace EduNetworkBuilder
 {
@@ -20,6 +20,11 @@ namespace EduNetworkBuilder
         [DisplayName("Name")]
         public string Name { get { return _Name; } set { _Name = value; } }
 
+        Color _Color = Color.Empty;
+        [DisplayName("ColorString")]
+        public string PacketColorString { get { return _Color.ToString(); } set { _Color = Color.FromName(value); } }
+        public Color PacketColor {  get { return _Color; } set { _Color = value; } }
+
         public VLANName()
         {
         }
@@ -28,6 +33,14 @@ namespace EduNetworkBuilder
         {
             ID = id;
             Name = name;
+            PacketColor = Color.Blue; //The default for everything
+        }
+
+        public VLANName(int id, string name, Color ColorForPacket)
+        {
+            ID = id;
+            Name = name;
+            _Color = ColorForPacket;
         }
     }