glibc/tests/Regression/bz804689-getaddrinfo-localhost6-returns-127-0-0-1/get.c

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/* from Jan Safranek */
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/socket.h>
#include <netdb.h>
#include <arpa/inet.h>
#define BUF_SIZE 500
int
main(int argc, char *argv[])
{
struct addrinfo hints;
struct addrinfo *result, *rp;
int s;
char buf[BUF_SIZE];
if (argc != 2) {
fprintf(stderr, "Usage: %s host\n", argv[0]);
exit(EXIT_FAILURE);
}
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = PF_INET6;
hints.ai_socktype = SOCK_DGRAM;
hints.ai_flags = 0;
hints.ai_protocol = 0;
s = getaddrinfo(argv[1], NULL, &hints, &result);
if (s != 0) {
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(s));
exit(EXIT_FAILURE);
}
for (rp = result; rp != NULL; rp = rp->ai_next) {
if (rp->ai_family == PF_INET6)
inet_ntop(PF_INET6, &((struct sockaddr_in6 *) rp->ai_addr)->sin6_addr, buf, BUF_SIZE);
else
inet_ntop(PF_INET, &((struct sockaddr_in *) rp->ai_addr)->sin_addr, buf, BUF_SIZE);
printf("Address: %s\n", buf);
}
return 0;
}