gethostbyname2 test

gethostbyname2_inet6.c

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

int
main(int argc, char *argv[])
{
        static struct hostent h_ent;
        static char h_buf[16384];
        struct hostent *hent;
        int herr = 0;

        if (argc != 2) {
                fprintf(stderr, "usage: gethostbyname2_inet6 <host>\n");
                return 1;
        }

        hent = gethostbyname2(argv[1], AF_INET6);
        printf("getostbyname2: hostent=%p, error(h_errno)=%d\n", hent, h_errno);

#ifdef __NetBSD__
        struct hostent *gethostbyname2_r(const char *, int, struct hostent *, char *, size_t, int *);
        hent = gethostbyname2_r(argv[1], AF_INET6, &h_ent, h_buf, sizeof(h_buf), &herr);
        printf("gethostbyname2_r: hostent=%p, error(locally)=%d\n", hent, herr);
#elif defined(__FreeBSD__) || defined(__linux__)
        int rc = gethostbyname2_r(argv[1], AF_INET6, &h_ent, h_buf, sizeof(h_buf), &hent, &herr);
        printf("gethostbyname2_r: hostent=%p, error(locally)=%d, return=%d\n", hent, herr, rc);
#endif

        return 0;
}