From e990297d2e61958ba2e1b4364bf32f1228a8eef4 Mon Sep 17 00:00:00 2001
From: reger <reger18@arcor.de>
Date: Thu, 15 Sep 2016 23:26:25 +0200
Subject: [PATCH] avoid NPE on hello message with missing "yourip" key
 http://mantis.tokeek.de/view.php?id=684

---
 source/net/yacy/peers/Protocol.java | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/source/net/yacy/peers/Protocol.java b/source/net/yacy/peers/Protocol.java
index 1acfef42a..01938443e 100644
--- a/source/net/yacy/peers/Protocol.java
+++ b/source/net/yacy/peers/Protocol.java
@@ -259,6 +259,10 @@ public final class Protocol {
             mySeed.setIPs(Switchboard.getSwitchboard().myPublicIPs());
         } else {
             final String myIP = result.get("yourip");
+            if (myIP == null) {
+                Network.log.info("yacyClient.hello result error: Peer sent incompleet hello message (key yourip is missing)");
+                return null; // no success
+            }
             // with the IPv6 extension, this may contain several ips, separated by comma ','
             HashSet<String> h = new HashSet<>();
             for (String s: CommonPattern.COMMA.split(myIP)) {