#include "dnsaccess.h"


/*Used because of stupid idea that IP address could be use rather then Name */
char* get_hostname_from_addr(char* addr, char* host, unsigned host_length){
    //Finds names assoicated to an IP address.
    struct sockaddr_in sa;
    memset(&sa, 0, sizeof(struct  sockaddr_in));
    sa.sin_family = AF_INET;
    inet_pton(AF_INET, addr, &(sa.sin_addr));

    getnameinfo((struct sockaddr*) &sa, sizeof(struct sockaddr_in), host, host_length, NULL, 0, 0);
    return host;
}

/* In final code, I do not think this is ever used */

char* get_first_addr_from_hostname(char* domain_name){
    //Finds IP addresses associated to a domain name.
    struct addrinfo hints;
    memset(&hints, 0, sizeof(hints));
    hints.ai_family = AF_INET;

    struct addrinfo* result;
    getaddrinfo(domain_name, NULL, &hints, &result);
    
    struct sockaddr_in* sa = (struct sockaddr_in*) result->ai_addr;
    struct in_addr ip_addr = sa->sin_addr;
    char* addr = inet_ntoa(ip_addr);

    return addr;
}

bool check_IP_address(char* addr){
    struct sockaddr_in sa;
    return inet_pton(AF_INET, addr, &(sa.sin_addr)) != 0;
}