From 2674d28ef4b555c1374d27262c539e595b780715 Mon Sep 17 00:00:00 2001
From: Michael Peter Christen <mc@yacy.net>
Date: Thu, 1 Aug 2013 12:35:44 +0200
Subject: [PATCH] protection against self-ping (may be cause by fraud attempts)

---
 htroot/yacy/hello.java | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/htroot/yacy/hello.java b/htroot/yacy/hello.java
index 014ab723b..7e27d4684 100644
--- a/htroot/yacy/hello.java
+++ b/htroot/yacy/hello.java
@@ -113,8 +113,14 @@ public final class hello {
         final String reportedPeerType = remoteSeed.get(Seed.PEERTYPE, Seed.PEERTYPE_JUNIOR);
         final double clientversion = remoteSeed.getVersion();
 
+        if ((reportedip + ':' + remoteSeed.getPort()).equals(sb.peers.mySeed().getPublicAddress())) {
+            // reject a self-ping
+            prop.put("message", "I am I");
+            return prop;
+        }
+        
         if (sb.isRobinsonMode() && !sb.isPublicRobinson()) {
-        	// if we are a robinson cluster, answer only if this client is known by our network definition
+            // if we are a robinson cluster, answer only if this client is known by our network definition
             prop.put("message", "I am robinson, I do not answer");
             return prop;
         }