PaperMC/CraftBukkit-Patches/0009-Proxy-IP-Filter.patch

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From f87755a50f02b5c85c289b1cbb63b5333044c631 Mon Sep 17 00:00:00 2001
From: md_5 <md_5@live.com.au>
Date: Tue, 23 Apr 2013 11:22:07 +1000
Subject: [PATCH] Proxy IP Filter
diff --git a/src/main/java/net/minecraft/server/ThreadLoginVerifier.java b/src/main/java/net/minecraft/server/ThreadLoginVerifier.java
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index 2ce2e3a..f87ebf9 100644
--- a/src/main/java/net/minecraft/server/ThreadLoginVerifier.java
+++ b/src/main/java/net/minecraft/server/ThreadLoginVerifier.java
@@ -28,6 +28,7 @@ class ThreadLoginVerifier extends Thread {
public void run() {
try {
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+ if (org.spigotmc.SpamHaus.filterIp(pendingConnection)) return; // Spigot
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String s = (new BigInteger(MinecraftEncryption.a(PendingConnection.a(this.pendingConnection), PendingConnection.b(this.pendingConnection).H().getPublic(), PendingConnection.c(this.pendingConnection)))).toString(16);
URL url = new URL("http://session.minecraft.net/game/checkserver.jsp?user=" + URLEncoder.encode(PendingConnection.d(this.pendingConnection), "UTF-8") + "&serverId=" + URLEncoder.encode(s, "UTF-8"));
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BufferedReader bufferedreader = new BufferedReader(new InputStreamReader(url.openConnection(PendingConnection.b(this.pendingConnection).ap()).getInputStream()));
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diff --git a/src/main/java/org/spigotmc/SpamHaus.java b/src/main/java/org/spigotmc/SpamHaus.java
new file mode 100644
index 0000000..55d8d12
--- /dev/null
+++ b/src/main/java/org/spigotmc/SpamHaus.java
@@ -0,0 +1,44 @@
+package org.spigotmc;
+
+import java.net.InetAddress;
+import net.minecraft.server.PendingConnection;
+
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+public class SpamHaus
+{
+
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+ private SpamHaus()
+ {
+ }
+
+ public static boolean filterIp(PendingConnection con)
+ {
+ if ( SpigotConfig.preventProxies )
+ {
+ try
+ {
+ InetAddress address = con.getSocket().getInetAddress();
+ String ip = address.getHostAddress();
+
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+ if ( !address.isLoopbackAddress() )
+ {
+ String[] split = ip.split( "\\." );
+ StringBuilder lookup = new StringBuilder();
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+ for ( int i = split.length - 1; i >= 0; i-- )
+ {
+ lookup.append( split[i] );
+ lookup.append( "." );
+ }
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+ lookup.append( "xbl.spamhaus.org." );
+ if ( InetAddress.getByName( lookup.toString() ) != null )
+ {
+ con.disconnect( "Your IP address (" + ip + ") is flagged as unsafe by spamhaus.org/xbl" );
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+ return true;
+ }
+ }
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+ } catch ( Exception ex )
+ {
+ }
+ }
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+ return false;
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+ }
+}
diff --git a/src/main/java/org/spigotmc/SpigotConfig.java b/src/main/java/org/spigotmc/SpigotConfig.java
index 358d5ec..83696e9 100644
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--- a/src/main/java/org/spigotmc/SpigotConfig.java
+++ b/src/main/java/org/spigotmc/SpigotConfig.java
@@ -117,4 +117,10 @@ public class SpigotConfig
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config.addDefault( path, def );
return config.getString( path, config.getString( path ) );
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}
+
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+ public static boolean preventProxies;
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+ private static void preventProxies()
+ {
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+ preventProxies = getBoolean( "settings.prevent-proxies", false );
+ }
}
--
1.8.1.2