From fc5c9b931b429908c4f68af4b4cb93e55339c5f8 Mon Sep 17 00:00:00 2001
From: Dreamacro <8615343+Dreamacro@users.noreply.github.com>
Date: Wed, 29 Jun 2022 23:36:24 +0800
Subject: [PATCH] Fix: try to unmap lAddr on tproxy udp listener

---
 listener/tproxy/udp.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/listener/tproxy/udp.go b/listener/tproxy/udp.go
index 60783563..0e7c059f 100644
--- a/listener/tproxy/udp.go
+++ b/listener/tproxy/udp.go
@@ -72,6 +72,11 @@ func NewUDP(addr string, in chan<- *inbound.PacketAdapter) (*UDPListener, error)
 			if err != nil {
 				continue
 			}
+
+			if rAddr.Addr().Is4() {
+				// try to unmap 4in6 address
+				lAddr = netip.AddrPortFrom(lAddr.Addr().Unmap(), lAddr.Port())
+			}
 			handlePacketConn(in, buf[:n], lAddr, rAddr)
 		}
 	}()