scan_ip4
if (!(count = scan_ip4(&text[negate+2], &octets[4])))
if ((size_t)scan_ip4(token->data, rdata->octets) != token->length)
if ((n = (size_t)scan_ip4(t, rdata->octets)) == 0)
if ((n = (size_t)scan_ip4(t + 1, rdata->octets)) == 0)
if ((size_t)scan_ip4(token->data, rdata->octets) != token->length)