From ee3f4c6fb3228b51d94c291ae61c2c1e1a92c95f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=BA=90=E6=96=87=E9=9B=A8?=
 <41315874+fumiama@users.noreply.github.com>
Date: Sun, 1 Jun 2025 00:24:12 +0900
Subject: [PATCH] fix(wg): panic on 0 peer MTU

---
 upper/services/wg/wg.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/upper/services/wg/wg.go b/upper/services/wg/wg.go
index 48d14c0..6cd9a28 100644
--- a/upper/services/wg/wg.go
+++ b/upper/services/wg/wg.go
@@ -145,6 +145,9 @@ func (wg *WG) init(srcport, dstport uint16) {
 		if peer.MTU >= 65535 {
 			panic("peer " + peer.IP + ": MTU too large")
 		}
+		if peer.MTU == 0 {
+			peer.MTU = wg.c.MTU
+		}
 		if peer.MTURandomRange >= peer.MTU/2 {
 			panic("peer " + peer.IP + ": MTURandomRange too large")
 		}