File: snmp-agent.hh

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#pragma once
#include "config.h"

#include <string>
#include <thread>
#include <unistd.h>

#include "mplexer.hh"
#include "channel.hh"

typedef struct netsnmp_request_info_s netsnmp_request_info;
typedef struct variable_list netsnmp_variable_list;

class SNMPAgent
{
public:
  SNMPAgent(const std::string& name, const std::string& daemonSocket);
  virtual ~SNMPAgent()
  {
  }

  void run()
  {
#ifdef HAVE_NET_SNMP
  d_thread = std::thread(&SNMPAgent::worker, this);
  d_thread.detach();
#endif /* HAVE_NET_SNMP */
  }

#ifdef HAVE_NET_SNMP
  static int setCounter64Value(netsnmp_request_info* request,
                               uint64_t value);
#endif /* HAVE_NET_SNMP */
protected:
#ifdef HAVE_NET_SNMP
  static void addSNMPTrapOID(netsnmp_variable_list** varList, const void* value, size_t len);

  static bool sendTrap(pdns::channel::Sender<netsnmp_variable_list, void(*)(netsnmp_variable_list*)>& sender,
                       netsnmp_variable_list* varList);

  pdns::channel::Sender<netsnmp_variable_list, void(*)(netsnmp_variable_list*)> d_sender;
  pdns::channel::Receiver<netsnmp_variable_list, void(*)(netsnmp_variable_list*)> d_receiver;
#endif /* HAVE_NET_SNMP */
private:
  void worker();
  static void handleTrapsCB(int fd, FDMultiplexer::funcparam_t& var);
  static void handleSNMPQueryCB(int fd, FDMultiplexer::funcparam_t& var);
  void handleTrapsEvent();
  void handleSNMPQueryEvent(int fd);

  std::thread d_thread;
};