feat: add param DoublePacket

upper/services/tunnel/tunnel_test.go

@@ -81,6 +81,7 @@ func testTunnel(t *testing.T, nw string, isplain bool, pshk *[32]byte, mtu uint1
 		MTU:            mtu,
 		MTURandomRange: mtu / 2,
 		UseZstd:        true,
+		DoublePacket:   true,
 	})
 	p.AddPeer(&link.PeerConfig{
 		PeerIP:         "192.168.1.2",

upper/services/wg/wg.go

@@ -154,6 +154,7 @@ func (wg *WG) init(srcport, dstport uint16) {
 			AllowTrans:     peer.AllowTrans,
 			NoPipe:         true,
 			UseZstd:        peer.UseZstd,
+			DoublePacket:   peer.DoublePacket,
 		})
 	}
 }