tcp layer build flag/value fix

Author: orangepizza

providers/http/nfqueue/nfqueue.go

@@ -103,12 +103,13 @@ func (w *HTTPProvider) serve(domain, token, keyAuth string) error {
 				log.Infof("got token packet")
 				replyhttp := craftkeyauthresponse(keyAuth)
 				outputTcp := &layers.TCP{
-					Seq: 3398127,
+					Seq: inputTcp.Ack - 1,
 					// we reply back so reverse src and dst ports
-					SrcPort: inputTcp.DstPort,
-					DstPort: inputTcp.SrcPort,
-					Ack:     inputTcp.Seq + 1,
-					Window:  100,
+					SrcPort:    inputTcp.DstPort,
+					DstPort:    inputTcp.SrcPort,
+					Ack:        inputTcp.Seq + uint32(len(tcpLayer.LayerPayload())),
+					DataOffset: 5,
+					PSH:        true,
 				}
 				outputTcp.Payload = replyhttp
 				//check network layer