eui64_aton
int eui64_aton(const char *, struct eui64 *);
if (eui64_aton(cur, e) == 0)
if (eui64_aton(nodestr, &eui) != 0)
if (eui64_hostton(nodestr, &eui) != 0 && eui64_aton(nodestr, &eui) != 0)
eui64_aton(optarg, &target) != 0)