From 004a568b307d72909db811c1d774d20bb95c50ab Mon Sep 17 00:00:00 2001
From: SunBK201 <sunbk201gm@gmail.com>
Date: Mon, 8 Dec 2025 13:04:45 +0800
Subject: [PATCH] fix: skip NOP and EOF options in clearTCPTimestamp

---
 src/internal/server/netlink/netlink_linux.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/internal/server/netlink/netlink_linux.go b/src/internal/server/netlink/netlink_linux.go
index 38e87c9..39c72e7 100644
--- a/src/internal/server/netlink/netlink_linux.go
+++ b/src/internal/server/netlink/netlink_linux.go
@@ -107,6 +107,9 @@ func (s *Server) clearTCPTimestamp(tcp *layers.TCP) bool {
 			modified = true
 			continue
 		}
+		if opt.OptionType == layers.TCPOptionKindNop || opt.OptionType == layers.TCPOptionKindEndList {
+			continue
+		}
 		newOptions = append(newOptions, opt)
 	}
 	if modified {