getIPaddress.cc

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#include <string>
#include <vector>
#include <iostream>
#include <iomanip>
 
#include "JSystem/JNetwork.hh"
#include "Jeep/JParser.hh"
#include "Jeep/JMessage.hh"
 
namespace {
 
  enum Option_t {
    IP_address  =   1,
    IP_subhex,
    IP_subdec,
    Hostname
  };
}
 
 
/**
 * \file
 *
 * Example program to print IP address.
 * \author mdejong
 */
int main(int argc, char* argv[])
{
  using namespace std;
  using namespace JPP;
 
  string host_name;
  int    option;
 
  try {
 
    JParser<> zap("Example program to print IP address.");
 
    zap['H'] = make_field(host_name)       = "localhost";
    zap['O'] = make_field(option, "option "
                          << IP_address << " -> IP address; "
                          << IP_subhex  << " -> IP sub-address (hex); "
                          << IP_subdec  << " -> IP sub-address (dec); "
                          << Hostname   << " -> host name")  = IP_address, IP_subhex, IP_subdec, Hostname;
 
    zap(argc, argv);
  }
  catch(const exception &error) {
    FATAL(error.what() << endl);
  }
 
  int ip = getIPnumber(host_name);
 
  switch (option) {
 
  case IP_address:
    cout << getIPaddress(ip)          << endl;  return 0;
 
  case IP_subhex:
    cout << hex << getSubaddress(ip)  << endl;  return 0;
 
  case IP_subdec:
    cout << dec << getSubaddress(ip)  << endl;  return 0;
 
  case Hostname:
    cout << dec << getHostname(ip)    << endl;  return 0;
 
  default:
    FATAL("Invalid option " << option << endl);
  }
}