/*
 *
 * (C) 2013-20 - ntop.org
 *
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 */

#ifndef _MAC_H_
#define _MAC_H_

#include "ntop_includes.h"

class Mac : public GenericHashEntry, public SerializableElement {
 private:
  Mutex m;
  u_int8_t mac[6];
  u_int16_t host_pool_id;
  u_int32_t bridge_seen_iface_id; /* != 0 for bridge interfaces only */
  bool special_mac, lockDeviceTypeChanges;
  bool stats_reset_requested, data_delete_requested;
  const char *manuf;
  MacStats *stats, *stats_shadow;
  time_t last_stats_reset;

  struct {
    char * dhcp; /* Extracted from DHCP dissection */
  } names;

  char * fingerprint;
  char * model;
  char * ssid;
  
  bool source_mac;
  DeviceType device_type;
#ifdef NTOPNG_PRO
  time_t captive_portal_notified;
#endif
  /* END Mac data: */

  void checkDeviceTypeFromManufacturer();
  void readDHCPCache();
  void freeMacData();
  void deleteMacData();
  bool statsResetRequested();
  void checkStatsReset();

 public:
  Mac(NetworkInterface *_iface, u_int8_t _mac[6]);
  ~Mac();

  inline u_int16_t getNumHosts()   { return getUses();            }
  inline void incUses() {
    GenericHashEntry::incUses();

    if(getUses() > CONST_MAX_NUM_HOST_USES) {
      setDeviceType(device_networking);
      lockDeviceTypeChanges = true;
    }
  }
  inline void decUses()            { GenericHashEntry::decUses(); }
  inline bool isSpecialMac()       { return(special_mac);         }
  inline bool isSourceMac()        { return(source_mac);          }
  inline void setSourceMac() {
    if(!source_mac && !special_mac) {
      source_mac = true;
      iface->incNumL2Devices();
    }
  }

  MacLocation locate();
  inline u_int32_t key()                       { return(Utils::macHash(mac)); }
  inline const u_int8_t* const get_mac() const { return(mac);                 }
  inline const char * const get_manufacturer() { return manuf ? manuf : NULL; }
  bool isNull() const;

  bool equal(const u_int8_t _mac[6]);

#ifdef NTOPNG_PRO
  inline time_t getNotifiedTime()    { return captive_portal_notified;       };
  inline void   setNotifiedTime()    { captive_portal_notified = time(NULL); };
  #endif
  inline void setSeenIface(u_int32_t idx)  { bridge_seen_iface_id = idx; setSourceMac(); }
  inline u_int32_t getSeenIface()     { return(bridge_seen_iface_id); }
  inline void setDeviceType(DeviceType devtype) {
    if(isNull())
      return;

    /* Called by ntopng when it can guess a device type during normal packet processing */
    if(!lockDeviceTypeChanges)
      device_type = devtype;
  }
  inline void forceDeviceType(DeviceType devtype) {
    /* Called when a user, from the GUI, wants to change the device type and specify a custom type */
    device_type = devtype;
    /* If the user specifies a custom type, then we want ntopng to stop guessing other types for
       the same device */
    if(!lockDeviceTypeChanges) lockDeviceTypeChanges = true;
  }
  inline DeviceType getDeviceType()        { return (device_type); }
  char * getDHCPName(char * const buf, ssize_t buf_size);
  void set_hash_entry_state_idle();
  void lua(lua_State* vm, bool show_details, bool asListElement);
  virtual char* get_string_key(char *buf, u_int buf_len) const { return(Utils::formatMac(mac, buf, buf_len)); };
  inline int16_t findAddress(AddressTree *ptree)        { return ptree ? ptree->findMac(mac) : -1;     };
  inline char* print(char *str, u_int str_len)          { return(Utils::formatMac(mac, str, str_len)); };
  void updateHostPool(bool isInlineCall, bool firstUpdate = false);
  void inlineSetModel(const char * const m);
  bool inlineSetFingerprint(const char * const f);
  void inlineSetSSID(const char * const s);
  void inlineSetDHCPName(const char * const dhcp_name);
  inline u_int16_t get_host_pool() { return(host_pool_id); }
  inline const char* getFingerprint() { return(fingerprint); }

  inline void requestStatsReset()                        { stats_reset_requested = true; };
  inline void requestDataReset()                         { data_delete_requested = true; requestStatsReset(); };
  void checkDataReset();

  inline void incSentStats(time_t t, u_int64_t num_pkts, u_int64_t num_bytes)  {
    if(first_seen == 0) first_seen = t;
    stats->incSentStats(t, num_pkts, num_bytes), last_seen = t;
  }
  
  inline void incnDPIStats(time_t when, ndpi_protocol_category_t ndpi_category,
	    u_int64_t sent_packets, u_int64_t sent_bytes, u_int64_t sent_goodput_bytes,
	    u_int64_t rcvd_packets, u_int64_t rcvd_bytes, u_int64_t rcvd_goodput_bytes) {
    stats->incnDPIStats(when, ndpi_category, sent_packets, sent_bytes, sent_goodput_bytes,
			rcvd_packets, rcvd_bytes, rcvd_goodput_bytes);
  }
  
  inline void incRcvdStats(time_t t,u_int64_t num_pkts, u_int64_t num_bytes) {
    stats->incRcvdStats(t, num_pkts, num_bytes);
  }

  void deserialize(json_object *obj);
  void serialize(json_object *obj, DetailsLevel details_level);
  char* getSerializationKey(char *buf, uint bufsize);

  inline u_int64_t  getNumSentArp()  { return(stats->getNumSentArp());      }
  inline u_int64_t  getNumRcvdArp()  { return(stats->getNumRcvdArp());      }
  inline void incNumDroppedFlows()   { stats->incNumDroppedFlows(); }
  inline void incSentArpRequests()   { stats->incSentArpRequests(); }
  inline void incSentArpReplies()    { stats->incSentArpReplies();  }
  inline void incRcvdArpRequests()   { stats->incRcvdArpRequests(); }
  inline void incRcvdArpReplies()    { stats->incRcvdArpReplies();  }
  void updateStats(struct timeval *tv);
  inline u_int64_t getNumBytes()              { return(stats->getNumBytes());      }
  inline float getBytesThpt()                 { return(stats->getBytesThpt());     }
  inline bool  isMulticast() {
    /*
      http://h22208.www2.hpe.com/eginfolib/networking/docs/switches/5130ei/5200-3944_ip-multi_cg/content/483573739.htm 
      https://ipcisco.com/lesson/multicast-mac-addresses/
    */
    if(
       ((mac[0] == 0x33) && (mac[1] == 0x33))
       ||
       ((mac[0] == 0x01) && (mac[1] == 0x00) && (mac[2] == 0x5E))
       )
      return(true);
    else
      return(false);
  }
};

#endif /* _MAC_H_ */