Fastest way to obtain IP address of current host

ip_discover.cpp

#include <cstdlib>
#include <iostream>
#include <fstream>

#include <netdb.h>
#include <arpa/inet.h>
#include <netinet/in.h>

#include <time.h>
#include <sys/time.h>

using namespace std;

int main(int argc, char** argv) {
  
  struct ifaddrs * ifAddrStruct=NULL;
  struct ifaddrs * ifa=NULL;
  void * tmpAddrPtr=NULL;

  getifaddrs(&ifAddrStruct);

  for (ifa = ifAddrStruct; ifa != NULL; ifa = ifa->ifa_next) {
    tmpAddrPtr=&((struct sockaddr_in *)ifa->ifa_addr)->sin_addr;
    char addressBuffer[INET_ADDRSTRLEN];
    inet_ntop(AF_INET, tmpAddrPtr, addressBuffer, INET_ADDRSTRLEN);
    if (!strcmp("eth0", ifa->ifa_name)) {
        printf("%s IP Address %s\n", ifa->ifa_name, addressBuffer); 
    }
  }

}