From 5eb6f82c1ade7ceac0e9f26283d35ec806e47b9f Mon Sep 17 00:00:00 2001
From: Prince Pereira <ppereira@microsoft.com>
Date: Fri, 3 Feb 2023 11:14:20 +0530
Subject: [PATCH] [Issue:#115501] Fix for issue with Loadbalancer policy
 creation for IPV6 endpoints in Dualstack mode.

---
 pkg/proxy/winkernel/hns.go | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/pkg/proxy/winkernel/hns.go b/pkg/proxy/winkernel/hns.go
index db0f835c55a..1f31c94e636 100644
--- a/pkg/proxy/winkernel/hns.go
+++ b/pkg/proxy/winkernel/hns.go
@@ -112,8 +112,28 @@ func (hns hns) getAllEndpointsByNetwork(networkName string) (map[string]*(endpoi
 			terminating: false,
 		}
 		endpointInfos[ep.IpConfigurations[0].IpAddress] = endpointInfos[ep.Id]
+
+		if len(ep.IpConfigurations) == 1 {
+			continue
+		}
+
+		// If ipFamilyPolicy is RequireDualStack or PreferDualStack, then there will be 2 IPS (iPV4 and IPV6)
+		// in the endpoint list
+		endpointDualstack := &endpointsInfo{
+			ip:         ep.IpConfigurations[1].IpAddress,
+			isLocal:    uint32(ep.Flags&hcn.EndpointFlagsRemoteEndpoint) == 0,
+			macAddress: ep.MacAddress,
+			hnsID:      ep.Id,
+			hns:        hns,
+			// only ready and not terminating endpoints were added to HNS
+			ready:       true,
+			serving:     true,
+			terminating: false,
+		}
+		endpointInfos[ep.IpConfigurations[1].IpAddress] = endpointDualstack
 	}
 	klog.V(3).InfoS("Queried endpoints from network", "network", networkName)
+	klog.V(5).InfoS("Queried endpoints details", "network", networkName, "endpointInfos", endpointInfos)
 	return endpointInfos, nil
 }