From be78efbd429c0b7180efe36fe4a826436e5a675b Mon Sep 17 00:00:00 2001
From: Viktor Liu <17948409+lixmal@users.noreply.github.com>
Date: Thu, 14 Nov 2024 20:15:16 +0100
Subject: [PATCH] [client] Handle panic on nil wg interface (#2891)

---
 client/internal/engine.go | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/client/internal/engine.go b/client/internal/engine.go
index 190d795cd..0f3a5d28a 100644
--- a/client/internal/engine.go
+++ b/client/internal/engine.go
@@ -38,7 +38,6 @@ import (
 	"github.com/netbirdio/netbird/client/internal/routemanager/systemops"
 	"github.com/netbirdio/netbird/client/internal/statemanager"
 
-
 	nbssh "github.com/netbirdio/netbird/client/ssh"
 	"github.com/netbirdio/netbird/client/system"
 	nbdns "github.com/netbirdio/netbird/dns"
@@ -171,7 +170,7 @@ type Engine struct {
 
 	relayManager *relayClient.Manager
 	stateManager *statemanager.Manager
-	srWatcher *guard.SRWatcher
+	srWatcher    *guard.SRWatcher
 }
 
 // Peer is an instance of the Connection Peer
@@ -641,6 +640,10 @@ func (e *Engine) updateSSH(sshConf *mgmProto.SSHConfig) error {
 }
 
 func (e *Engine) updateConfig(conf *mgmProto.PeerConfig) error {
+	if e.wgInterface == nil {
+		return errors.New("wireguard interface is not initialized")
+	}
+
 	if e.wgInterface.Address().String() != conf.Address {
 		oldAddr := e.wgInterface.Address().String()
 		log.Debugf("updating peer address from %s to %s", oldAddr, conf.Address)