Merge pull request #3 from Alonza0314/fix/packet-write-to-chan

fix: wrong write

Author: Alonza0314

client/client.go

@@ -262,14 +262,14 @@ func (c *DpTcpClient) packetEliminate(ctx context.Context) {
 }
 
 func (c *DpTcpClient) packetEliminateMain(packet []byte) {
-	c.writeToTun <- packet
 	h := xxhash.Sum64(packet)
 	if _, ok := c.packetMap.Get(h); ok {
 		c.packetMap.Del(h)
 		c.TunLog.Debugf("Eliminated packet %d", h)
 		c.TunLog.Tracef("Eliminated packet %d, %x", h, packet)
 		return
 	}
+	c.writeToTun <- packet
 	c.packetMap.Set(h, struct{}{})
 	c.TunLog.Debugf("Packet %d stored", h)
 	c.TunLog.Tracef("Packet %d stored, %x", h, packet)

server/server.go

@@ -261,14 +261,14 @@ func (s *DpTcpServer) packetEliminate(ctx context.Context) {
 }
 
 func (s *DpTcpServer) packetEliminateMain(packet []byte) {
-	s.writeToTun <- packet
 	h := xxhash.Sum64(packet)
 	if _, ok := s.packetMap.Get(h); ok {
 		s.packetMap.Del(h)
 		s.TunLog.Debugf("Eliminated packet %d", h)
 		s.TunLog.Tracef("Eliminated packet %d, %x", h, packet)
 		return
 	}
+	s.writeToTun <- packet
 	s.packetMap.Set(h, struct{}{})
 	s.TunLog.Debugf("Packet %d stored", h)
 	s.TunLog.Tracef("Packet %d stored, %x", h, packet)