Added min_pckt_export_treshold constant

Author: hynekkar

process/ovpn.cpp

@@ -209,7 +209,7 @@ void OVPNPlugin::pre_export(Flow &rec)
 
    //do not export ovpn for short flows, usually port scans
    uint32_t packets = rec.src_packets + rec.dst_packets;
-   if (packets <= 5) { 
+   if (packets <= min_pckt_export_treshold) { 
       rec.remove_extension(RecordExtOVPN::REGISTERED_ID);
       return;
    }

process/ovpn.hpp

@@ -156,6 +156,7 @@ class OVPNPlugin : public ProcessPlugin
    static const uint32_t c_udp_opcode_index = 0;
    static const uint32_t c_tcp_opcode_index = 2;
    static const uint32_t min_pckt_treshold = 20;
+   static const uint32_t min_pckt_export_treshold = 5;
    static constexpr float data_pckt_treshold = 0.6f;
    static const int32_t invalid_pckt_treshold = 4;
    static const uint32_t min_opcode = 1;