From b1fb9ef63e79964d11195e61041bd9e432bb4c5c Mon Sep 17 00:00:00 2001
From: Elijus Gustys <elijus.gustys@gmail.com>
Date: Fri, 29 Aug 2025 10:23:06 +0300
Subject: [PATCH] Modify multicast group joining with local IP

---
 EEIP.NET/EIPClient.cs | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/EEIP.NET/EIPClient.cs b/EEIP.NET/EIPClient.cs
index aa0acb9..670ca73 100644
--- a/EEIP.NET/EIPClient.cs
+++ b/EEIP.NET/EIPClient.cs
@@ -556,8 +556,11 @@ public void ForwardOpen(bool largeForwardOpen)
             if (multicastAddress != 0)
             {
                 System.Net.IPAddress multicast = (new System.Net.IPAddress(multicastAddress));
-                udpClientReceive.JoinMulticastGroup(multicast);
-              
+
+                System.Net.IPEndPoint localEndPoint = (System.Net.IPEndPoint)client.Client.LocalEndPoint;
+                System.Net.IPAddress localIP = localEndPoint.Address;
+
+                udpClientReceive.JoinMulticastGroup(multicast, localIP);
             }
 
             System.Threading.Thread sendThread = new System.Threading.Thread(sendUDP);