From c30a3aaa273143aa2617bd167ebc957462af88dd Mon Sep 17 00:00:00 2001
From: Leo Antunes <leo@costela.net>
Date: Thu, 30 Jun 2022 23:22:25 +0200
Subject: [PATCH] fix: ignore existing routes

---
 wg/wireguard.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/wg/wireguard.go b/wg/wireguard.go
index efcb45a..4f4d8d2 100644
--- a/wg/wireguard.go
+++ b/wg/wireguard.go
@@ -1,6 +1,7 @@
 package wg
 
 import (
+	"errors"
 	"fmt"
 	"hash/fnv"
 	"net"
@@ -140,7 +141,7 @@ func (s *State) SetUpInterface(nodes []common.Node) error {
 			LinkIndex: link.Attrs().Index,
 			Dst:       addrToIPNet(node.OverlayAddr),
 			Scope:     netlink.SCOPE_LINK,
-		}); err != nil {
+		}); err != nil && !errors.Is(err, os.ErrExist) {
 			return fmt.Errorf("adding route %s to %s: %w", node.OverlayAddr, s.iface, err)
 		}
 	}