DNS Enumeration In CPP

dns-enum.cpp

#include <iostream>
#include <string>
#include <netdb.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <cstring>

using namespace std;

int main(int argc, char *argv[])
{
    if (argc < 2)
    {
        cout << "Usage: " << argv[0] << " <domain-name>" << endl;
        return 1;
    }

    string domainName = argv[1];
    struct hostent *hostInfo;

    hostInfo = gethostbyname(domainName.c_str());
    if (!hostInfo)
    {
        cout << "Could not retrieve information for domain: " << domainName << endl;
        return 1;
    }

    cout << "IP addresses for " << domainName << ":" << endl;
    for (int i = 0; hostInfo->h_addr_list[i]; i++)
    {
        struct in_addr addr;
        memcpy(&addr, hostInfo->h_addr_list[i], sizeof(struct in_addr));
        cout << inet_ntoa(addr) << endl;
    }

    return 0;
}