From 9d74ef5a11e8b3c2bc2f5e635b294df9aebb6fa5 Mon Sep 17 00:00:00 2001
From: Ameya Deshpande <ameyanrd@outlook.com>
Date: Tue, 21 Sep 2021 16:16:00 +0000
Subject: [PATCH] nix-vector-routing: Add check for remote link-local address
 in subnet-matching

Signed-off-by: Ameya Deshpande <ameyanrd@outlook.com>
---
 src/nix-vector-routing/model/nix-vector-routing.cc | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/nix-vector-routing/model/nix-vector-routing.cc b/src/nix-vector-routing/model/nix-vector-routing.cc
index d451a09e3..33afd8150 100644
--- a/src/nix-vector-routing/model/nix-vector-routing.cc
+++ b/src/nix-vector-routing/model/nix-vector-routing.cc
@@ -416,6 +416,13 @@ NixVectorRouting<T>::GetAdjacentNetDevices (Ptr<NetDevice> netDevice, Ptr<Channe
               for (uint32_t k = 0; k < remoteDeviceAddresses; ++k)
                 {
                   IpInterfaceAddress remoteDeviceIfAddr = remoteDeviceInterface->GetAddress (k);
+                  if constexpr (!IsIpv4::value)
+                    {
+                      if (remoteDeviceIfAddr.GetScope () == Ipv6InterfaceAddress::LINKLOCAL)
+                        {
+                          continue;
+                        }
+                    }
                   if (netDeviceIfAddr.IsInSameSubnet (remoteDeviceIfAddr.GetAddress ()))
                     {
                       commonSubnetFound = true;