getaddrinfo.c

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>

struct addrinfo hints, *infoptr; // So no need to use memset global variables

int main() {
    hints.ai_family = AF_INET; // AF_INET means IPv4 only addresses

    int result = getaddrinfo("www.bbc.com", NULL, &hints, &infoptr);
    if (result) {
        fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(result));
        exit(1);
    }

    struct addrinfo *p;
    char host[256];

    for (p = infoptr; p != NULL; p = p->ai_next) {

        getnameinfo(p->ai_addr, p->ai_addrlen, host, sizeof (host), NULL, 0, NI_NUMERICHOST);
        puts(host);
    }

    freeaddrinfo(infoptr);
    return 0;
}