fix tcp headers

Author: orangepizza

providers/http/nfqueue/nfqueue.go

@@ -61,12 +61,13 @@ func craftReplyPacketBytes(keyAuth string, inputpacket gopacket.Packet) []byte {
 
 	httplayer := gopacket.Payload(craftkeyauthresponse(keyAuth))
 	tcplayer := &layers.TCP{
-		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(inputTcp.Payload)),
+		Seq:        inputTcp.Ack - 1,
+		DataOffset: 5,
+		PSH:        true,
 	}
 	//check network layer
 	// this is reply so we reverse sorce and dst ip