NS_IN6ADDRSZ
uint8_t tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp;
memset((tp = tmp), '\0', NS_IN6ADDRSZ);
endp = tp + NS_IN6ADDRSZ;
memcpy(dst, tmp, NS_IN6ADDRSZ);
#ifndef NS_IN6ADDRSZ