Add ForwardMark to global settings (#173)

util/config.go

@@ -27,6 +27,7 @@ const (
 	DefaultDNS                 = "1.1.1.1"
 	DefaultMTU                 = 1450
 	DefaultPersistentKeepalive = 15
+	DefaultForwardMark         = "0xca6c"
 	DefaultConfigFilePath      = "/etc/wireguard/wg0.conf"
 	UsernameEnvVar             = "WGUI_USERNAME"
 	PasswordEnvVar             = "WGUI_PASSWORD"

util/util.go

@@ -56,11 +56,17 @@ func BuildClientConfig(client model.Client, server model.Server, setting model.G
 		peerPersistentKeepalive = fmt.Sprintf("PersistentKeepalive = %d\n", setting.PersistentKeepalive)
 	}
 
+	forwardMark := ""
+	if setting.ForwardMark != DefaultForwardMark {
+		forwardMark = fmt.Sprintf("FwMark = %s\n", setting.ForwardMark)
+	}
+
 	// build the config as string
 	strConfig := "[Interface]\n" +
 		clientAddress +
 		clientPrivateKey +
 		clientDNS +
+		forwardMark +
 		"\n[Peer]\n" +
 		peerPublicKey +
 		peerPresharedKey +