Issue #13.

m1k1o · Feb 12, 2019 · 0bda9e6 · 0bda9e6
1 parent c322197
commit 0bda9e6
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Showing 2 changed files with 48 additions and 6 deletions.
diff --git a/Router/RIP/RIPService.cs b/Router/RIP/RIPService.cs
@@ -1,6 +1,8 @@
 using PacketDotNet;
 using Router.Protocols;
 using System;
+using System.Collections.Generic;
+using System.Linq;
 
 namespace Router.RIP
 {
@@ -47,16 +49,32 @@ public void OnStopped(Interface Interface)
 
         public void OnChanged(Interface Interface)
         {
-            throw new NotImplementedException();
-
-            var RIPEntry = RIPTable.Instance.Find(Interface, Interface.IPNetwork);
-            if (RIPEntry == null)
+            // Poison old
+            var OldRIPEntry = RIPTable.Instance.FindAll(Interface).Where(Entry => Entry.Metric == 1).First();
+            if (OldRIPEntry == null)
             {
-                throw new Exception("RIPEntry not found while Updating");
+                throw new Exception("RIPEntry not found while Stopping");
             }
 
-            RIPUpdates.SendTriggered(Interface, RIPEntry);
+            OldRIPEntry.PossibblyDown = true;
+
+            // Remove all routes from that interface ?
+            RIPTable.Instance.Remove(Interface);
 
+            // Insert new
+            var NewRIPEntry = new RIPEntry(Interface, Interface.IPNetwork, Interface.IPAddress, 1)
+            {
+                SyncWithRT = false,
+                CanBeUpdated = false,
+                TimersEnabled = false
+            };
+            RIPTable.Instance.Add(NewRIPEntry);
+
+            RIPUpdates.SendTriggered(Interface, new List<RIPEntry> {
+                OldRIPEntry,
+                NewRIPEntry
+            });
+            RIPRequest.AskForUpdate(Interface);
             RIPTable.Instance.SyncWithRT();
         }
 

diff --git a/Router/RIP/RIPTable.cs b/Router/RIP/RIPTable.cs
@@ -83,10 +83,21 @@ public void GarbageCollector()
             });
         }
 
+        private int LastHashCode;
+
         public void SyncWithRT()
         {
             GarbageCollector();
 
+            var Entries = BestEntries();
+
+            var HashCode = RIPListExtensions.GetHashCode(Entries);
+            if (Entries.Count == 0 || LastHashCode == HashCode)
+            {
+                return;
+            }
+            LastHashCode = HashCode;
+
             foreach (var Entry in Entries)
             {
                 if (!Entry.SyncWithRT)
@@ -121,5 +132,18 @@ public static RIPEntry Find(this List<RIPEntry> Entries, IPNetwork IPNetwork)
         {
             return Entries.Find(Entry => Entry.IPNetwork == IPNetwork);
         }
+
+        public static int GetHashCode(List<RIPEntry> Entries)
+        {
+            unchecked
+            {
+                int hash = 19;
+                foreach (var Entry in Entries)
+                {
+                    hash = hash * 31 + Entry.GetHashCode();
+                }
+                return hash;
+            }
+        }
     }
 }