size_t len;
int len;
inet_ntop4(const unsigned char *src, char *dst, size_t size) {	static const char fmt[] = "%u.%u.%u.%u";	char tmp[sizeof("255.255.255.255")];	size_t len;	len = snprintf(tmp, sizeof(tmp), fmt, src[0], src[1], src[2], src[3]);	if (len >= size) {		errno = ENOSPC;		return (NULL);	}	strlcpy(dst, tmp, size);	return (dst);}