From e4e5c36577707df5b1dcd909889c326ac3d611e3 Mon Sep 17 00:00:00 2001
From: Anton Keks <anton@codeborne.com>
Date: Mon, 15 Feb 2021 20:46:46 +0200
Subject: [PATCH] handle "Invalid argument" ConnectionException as host is down
 (e.g. invalid IPv6 address)

---
 src/net/azib/ipscan/core/net/TCPPinger.java | 19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

diff --git a/src/net/azib/ipscan/core/net/TCPPinger.java b/src/net/azib/ipscan/core/net/TCPPinger.java
index 0817c056..7cce37a6 100644
--- a/src/net/azib/ipscan/core/net/TCPPinger.java
+++ b/src/net/azib/ipscan/core/net/TCPPinger.java
@@ -73,16 +73,15 @@ public class TCPPinger implements Pinger {
 					// we've got an RST packet from the host - it is alive
 					success(result, startTime);
 				}
-				else
-					// this should result in NoRouteToHostException or ConnectException, but not all Java implementation respect that
-					if (e instanceof NoRouteToHostException || msg.contains(/*No*/"route to host") || msg.contains(/*Host is*/"down") || msg.contains(/*Network*/"unreachable") || msg.contains(/*Socket*/"closed")) {
-						// host is down
-						break;
-					}
-					else {
-						// something unknown
-						LOG.log(INFO, subject.toString(), e);
-					}
+				// this should result in NoRouteToHostException or ConnectException, but not all Java implementation respect that
+				else if (e instanceof NoRouteToHostException || msg.contains(/*No*/"route to host") || msg.contains(/*Host is*/"down") || msg.contains(/*Network*/"unreachable") || msg.contains(/*Socket*/"closed") || msg.contains("Invalid argument")) {
+					// host is down
+					break;
+				}
+				else {
+					// something unknown
+					LOG.log(INFO, subject.toString(), e);
+				}
 			}
 			finally {
 				closeQuietly(socket);