Server crashing exploit fix.

build.xml

@@ -31,7 +31,7 @@
 	</target>
 
 	<target name="compile" depends="init" description="Compile the source.">
-		<javac destdir="${build}/classes" optimize="on" debug="on" debuglevel="lines,vars,source" source="1.6" target="1.6" nowarn="off">
+		<javac destdir="${build}/classes" optimize="on" debug="on" debuglevel="lines,vars,source" source="1.6" target="1.6" nowarn="off" includeantruntime="false">
 			<src path="${src}" />
 			<classpath refid="classpath" />
 		</javac>
@@ -56,7 +56,7 @@
 				<include name="*.sh" />
 			</fileset>
 			<fileset dir="jarjar">
-				<include name="minecraft_server.jar" />
+				<!--<include name="minecraft_server.jar" />-->
 				<include name="jarjar.jar" />
 				<include name="mysql-connector-java-bin.jar" />
 				<include name="rules.rules" />

src/OItemInWorldManager.java

@@ -0,0 +1,137 @@
+
+public class OItemInWorldManager {
+
+    private OWorld b;
+    public OEntityPlayer a;
+    private float c = 0.0F;
+    private int d;
+    private int e = 0;
+    private float f = 0.0F;
+    private int g;
+    private int h;
+    private int i;
+    private int j;
+    private boolean k;
+    private int l;
+    private int m;
+    private int n;
+    private int o;
+
+    public OItemInWorldManager(OWorld paramOWorld) {
+        b = paramOWorld;
+    }
+
+    public void a() {
+        // hMod: workaround for servers that can't keep up
+        j = (int) System.currentTimeMillis() / 50;
+
+        if (k) {
+            int i1 = j - o;
+            int i2 = b.a(l, m, n);
+            if (i2 != 0) {
+                OBlock localOBlock = OBlock.m[i2];
+                float f1 = localOBlock.a(a) * (i1 + 1);
+                if (f1 >= 1.0F) {
+                    k = false;
+                    d(l, m, n);
+                }
+            } else {
+                k = false;
+            }
+        }
+    }
+
+    public void a(int paramInt1, int paramInt2, int paramInt3) {
+        d = j;
+        int i1 = b.a(paramInt1, paramInt2, paramInt3);
+        if (i1 > 0) {
+            OBlock.m[i1].b(b, paramInt1, paramInt2, paramInt3, a);
+        }
+        if ((i1 > 0) && (OBlock.m[i1].a(a) >= 1.0F)) {
+            d(paramInt1, paramInt2, paramInt3);
+        } else {
+            g = paramInt1;
+            h = paramInt2;
+            i = paramInt3;
+        }
+    }
+
+    public void b(int paramInt1, int paramInt2, int paramInt3) {
+        if ((paramInt1 == g) && (paramInt2 == h) && (paramInt3 == i)) {
+            int i1 = j - d;
+
+            int i2 = b.a(paramInt1, paramInt2, paramInt3);
+            if (i2 != 0) {
+                OBlock localOBlock = OBlock.m[i2];
+                float f1 = localOBlock.a(a) * (i1 + 1);
+                if (f1 >= 1.0F) {
+                    d(paramInt1, paramInt2, paramInt3);
+                } else if (!k) {
+                    k = true;
+                    l = paramInt1;
+                    m = paramInt2;
+                    n = paramInt3;
+                    o = d;
+                }
+            }
+        }
+        c = 0.0F;
+        e = 0;
+    }
+
+    public boolean c(int paramInt1, int paramInt2, int paramInt3) {
+        OBlock localOBlock = OBlock.m[b.a(paramInt1, paramInt2, paramInt3)];
+        int i1 = b.b(paramInt1, paramInt2, paramInt3);
+        boolean bool = b.e(paramInt1, paramInt2, paramInt3, 0);
+        if ((localOBlock != null) && (bool)) {
+            localOBlock.b(b, paramInt1, paramInt2, paramInt3, i1);
+        }
+        return bool;
+    }
+
+    public boolean d(int paramInt1, int paramInt2, int paramInt3) {
+        int i1 = b.a(paramInt1, paramInt2, paramInt3);
+        int i2 = b.b(paramInt1, paramInt2, paramInt3);
+        boolean bool = c(paramInt1, paramInt2, paramInt3);
+
+        OItemStack localOItemStack = a.z();
+        if (localOItemStack != null) {
+            localOItemStack.a(i1, paramInt1, paramInt2, paramInt3);
+            if (localOItemStack.a == 0) {
+                localOItemStack.a(a);
+                a.A();
+            }
+        }
+        if ((bool) && (a.b(OBlock.m[i1]))) {
+            OBlock.m[i1].a_(b, paramInt1, paramInt2, paramInt3, i2);
+            ((OEntityPlayerMP) a).a.b(new OPacket53BlockChange(paramInt1, paramInt2, paramInt3, b));
+        }
+        return bool;
+    }
+
+    public boolean a(OEntityPlayer paramOEntityPlayer, OWorld paramOWorld, OItemStack paramOItemStack) {
+        int i1 = paramOItemStack.a;
+        OItemStack localOItemStack = paramOItemStack.a(paramOWorld, paramOEntityPlayer);
+        if ((localOItemStack != paramOItemStack) || ((localOItemStack != null) && (localOItemStack.a != i1))) {
+            paramOEntityPlayer.i.a[paramOEntityPlayer.i.c] = localOItemStack;
+            if (localOItemStack.a == 0) {
+                paramOEntityPlayer.i.a[paramOEntityPlayer.i.c] = null;
+            }
+            return true;
+        }
+        return false;
+    }
+
+    public boolean a(OEntityPlayer paramOEntityPlayer, OWorld paramOWorld, OItemStack paramOItemStack, int paramInt1, int paramInt2, int paramInt3, int paramInt4) {
+        int i1 = paramOWorld.a(paramInt1, paramInt2, paramInt3);
+        if ((i1 > 0)
+                && (OBlock.m[i1].a(paramOWorld, paramInt1, paramInt2, paramInt3, paramOEntityPlayer))) {
+            return true;
+        }
+
+        if (paramOItemStack == null) {
+            return false;
+        }
+        return paramOItemStack.a(paramOEntityPlayer, paramOWorld, paramInt1, paramInt2, paramInt3, paramInt4);
+    }
+}

src/OPacket16BlockItemSwitch.java

@@ -0,0 +1,36 @@
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.util.logging.Level;
+
+public class OPacket16BlockItemSwitch extends OPacket
+{
+  public int a;
+
+  public void a(DataInputStream paramDataInputStream)
+  {
+    try {
+      a = paramDataInputStream.readShort();
+    } catch (IOException e) {
+      Main.log.log(Level.SEVERE, "Exception while reading data from Packet16: " + e, e);
+    }
+    if ((a < 0) || (a > 8))
+        a = 0;
+  }
+
+  public void a(DataOutputStream paramDataOutputStream) {
+    try {
+      paramDataOutputStream.writeShort(a);
+    } catch (IOException e) {
+      Main.log.log(Level.SEVERE, "Exception while reading data from Packet16: " + e, e);
+    }
+  }
+
+  public void a(ONetHandler paramONetHandler) {
+    paramONetHandler.a(this);
+  }
+
+  public int a() {
+    return 2;
+  }
+}