From 4a578b145000800e76211aa390897d05bb593a98 Mon Sep 17 00:00:00 2001
From: Steven Siloti <ssiloti@gmail.com>
Date: Mon, 28 May 2018 14:07:34 -0700
Subject: [PATCH] fix scope_id in enum_routes on Windows

---
 src/enum_net.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/enum_net.cpp b/src/enum_net.cpp
index c110ac665..5514e0350 100644
--- a/src/enum_net.cpp
+++ b/src/enum_net.cpp
@@ -1114,6 +1114,16 @@ int _System __libsocket_sysctl(int* mib, u_int namelen, void *oldp, size_t *oldl
 				{
 					ip_route r;
 					r.gateway = sockaddr_to_address((const sockaddr*)&routes->Table[i].NextHop);
+#if TORRENT_USE_IPV6
+					// The scope_id in NextHop is always zero because that would make
+					// things too easy apparently
+					if (r.gateway.is_v6() && r.gateway.to_v6().is_link_local())
+					{
+						address_v6 gateway6 = r.gateway.to_v6();
+						gateway6.scope_id(routes->Table[i].InterfaceIndex);
+						r.gateway = gateway6;
+					}
+#endif
 					r.destination = sockaddr_to_address(
 						(const sockaddr*)&routes->Table[i].DestinationPrefix.Prefix);
 					r.netmask = build_netmask(routes->Table[i].DestinationPrefix.PrefixLength