From 54840c554272b85cfdf484748f4bfa9987d9cfba Mon Sep 17 00:00:00 2001
From: xtaci <imap@live.com>
Date: Mon, 16 Dec 2024 20:06:37 +0800
Subject: [PATCH] use straight forward nil handling

---
 hopper.go | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/hopper.go b/hopper.go
index adb0831..8aa0fdd 100644
--- a/hopper.go
+++ b/hopper.go
@@ -189,10 +189,11 @@ func (l *Listener) clientIn(data []byte, raddr net.Addr) {
 	// onClientIn callback
 	if l.onClientIn != nil {
 		data = l.onClientIn(raddr, data)
-		// blackhole the packet if the callback returns nil
-		if data == nil {
-			return
-		}
+	}
+
+	// blackhole if the data is nil after onClientIn callback
+	if data == nil {
+		return
 	}
 
 	// encrypt or re-encrypt the packet if crypterOut is set(with new nonce)