IPv6 TCP Client Using getaddrinfo() for Name/Service Lookup

struct addrinfo *res, *ainfo;struct addrinfo hints;

/* clear out hints */memset ((char *)&hints, 0, sizeof(hints));

hints.ai_socktype = SOCK_STREAM;

error =  getaddrinfo(argv[1], "example", &hints, &res);

if (error != 0) {
	fprintf(stderr, "%s: %s not found in name service database\n",
		argv[0], argv[1]);
		exit(1);
}
for (ainfo = res; ainfo != NULL; ainfo = ainfo->ai_next) {
	/* Create the socket. */
	s = socket (ainfo->ai_family,ainfo->ai_socktype,
		ainfo->ai_protocol);
	if (s == -1) {
		perror(argv[0]);
		fprintf(stderr, "%s: unable to create socket\n", argv[0]);
		freeaddrinfo(res);
		exit(1);
		}
	if (connect(s, ainfo->ai_addr, ainfo->ai_addrlen) == -1) {
	 perror(argv[0]);
	 fprintf(stderr, "%s: unable to connect to remote\n", argv[0]);
		close(s);
		continue;
	}
	else
		break;
}