diff --git a/Cargo.lock b/Cargo.lock
index ce14063..a1cda61 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,5 +1,14 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+[[package]]
+name = "aho-corasick"
+version = "0.7.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7404febffaa47dac81aa44dba71523c9d069b1bdc50a77db41195149e17f68e5"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "autocfg"
 version = "1.0.1"
@@ -69,6 +78,15 @@ version = "0.3.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "847ce131b72ffb13b6109a221da9ad97a64cbe48feb1028356b836b47b8f1748"
 
+[[package]]
+name = "getopts"
+version = "0.2.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "14dbbfd5c71d70241ecf9e6f13737f7b5ce823821063188d7e46c41d371eebd5"
+dependencies = [
+ "unicode-width",
+]
+
 [[package]]
 name = "getrandom"
 version = "0.1.15"
@@ -293,10 +311,12 @@ name = "radius-rs"
 version = "0.1.0"
 dependencies = [
  "chrono",
+ "getopts",
  "log",
  "md5",
  "num_enum",
  "rand",
+ "regex",
  "thiserror",
  "tokio",
 ]
@@ -348,6 +368,24 @@ version = "0.1.57"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "41cc0f7e4d5d4544e8861606a285bb08d3e70712ccc7d2b84d7c0ccfaf4b05ce"
 
+[[package]]
+name = "regex"
+version = "1.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "38cf2c13ed4745de91a5eb834e11c00bcc3709e773173b2ce4c56c9fbde04b9c"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-syntax",
+ "thread_local",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.6.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3b181ba2dcf07aaccad5448e8ead58db5b742cf85dfe035e2227f137a539a189"
+
 [[package]]
 name = "scopeguard"
 version = "1.1.0"
@@ -424,6 +462,15 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "thread_local"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d40c6d1b69745a6ec6fb1ca717914848da4b44ae29d9b3080cbee91d72a69b14"
+dependencies = [
+ "lazy_static",
+]
+
 [[package]]
 name = "time"
 version = "0.1.44"
@@ -477,6 +524,12 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "unicode-width"
+version = "0.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9337591893a19b88d8d87f2cec1e73fad5cdfd10e5a6f349f498ad6ea2ffb1e3"
+
 [[package]]
 name = "unicode-xid"
 version = "0.2.1"
diff --git a/Cargo.toml b/Cargo.toml
index d2c84c1..d4f380d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,3 +14,5 @@ num_enum = "0.5.1"
 tokio = { version = "0.3.4", features = ["full"] }
 log = "0.4.11"
 thiserror = "1.0"
+regex = "1"
+getopts = "0.2"
diff --git a/src/bin/code_gen.rs b/src/bin/code_gen.rs
new file mode 100644
index 0000000..142ae79
--- /dev/null
+++ b/src/bin/code_gen.rs
@@ -0,0 +1,121 @@
+use std::collections::HashMap;
+use std::fs::File;
+use std::io::BufRead;
+use std::path::Path;
+use std::{env, io, process};
+
+use getopts::Options;
+use regex::Regex;
+
+const ATTRIBUTE_KIND: &str = "ATTRIBUTE";
+const VALUE_KIND: &str = "VALUE";
+
+#[derive(Debug)]
+struct RadiusAttribute {
+    name: String,
+    identifier: u16,
+    typ: String,
+    is_encrypt: bool,
+}
+
+#[derive(Debug)]
+struct RadiusValue {
+    name: String,
+    identifier: u16,
+}
+
+fn print_usage(program: &str, opts: &Options) {
+    let brief = format!("Usage: {} FILE [options]", program);
+    print!("{}", opts.usage(&brief));
+    process::exit(0);
+}
+
+fn read_lines<P>(filename: P) -> io::Result<io::Lines<io::BufReader<File>>>
+where
+    P: AsRef<Path>,
+{
+    let file = File::open(filename)?;
+    Ok(io::BufReader::new(file).lines())
+}
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+    let program = args[0].clone();
+
+    let mut opts = Options::new();
+    let matches = opts
+        .parse(&args[1..])
+        .unwrap_or_else(|f| panic!(f.to_string()));
+
+    let dict_file_path = matches.free[0].clone();
+    let (radius_attributes, radius_attribute_to_values) = parse_dict_file(dict_file_path).unwrap();
+    println!("{:?}", radius_attributes);
+    println!("{:?}", radius_attribute_to_values);
+}
+
+type DictParsed = (Vec<RadiusAttribute>, HashMap<String, Vec<RadiusValue>>);
+
+fn parse_dict_file(dict_file_path: String) -> Result<DictParsed, String> {
+    let line_filter_re = Regex::new(r"^(?:#.*|)$").unwrap();
+    let tabs_re = Regex::new(r"\t+").unwrap();
+
+    let mut radius_attributes: Vec<RadiusAttribute> = Vec::new();
+    let mut radius_attribute_to_values: HashMap<String, Vec<RadiusValue>> = HashMap::new();
+
+    let lines = read_lines(dict_file_path).unwrap();
+    for line_result in lines {
+        let line = line_result.unwrap();
+
+        if line_filter_re.is_match(line.as_str()) {
+            continue;
+        }
+
+        let items = tabs_re.split(line.as_str()).collect::<Vec<&str>>();
+
+        if items.len() < 4 {
+            return Err("the number of items is lacked in a line".to_owned());
+        }
+
+        let kind = items[0];
+        match kind {
+            ATTRIBUTE_KIND => {
+                let type_descriptions = items[3].split(' ').collect::<Vec<&str>>();
+                let typ = type_descriptions[0].to_string();
+                let is_encrypt = if type_descriptions.len() >= 2 {
+                    type_descriptions[1] == "encrypt=1" // FIXME: ad-hoc!!!
+                } else {
+                    false
+                };
+
+                radius_attributes.push(RadiusAttribute {
+                    name: items[1].to_string(),
+                    identifier: items[2].parse().unwrap(),
+                    typ,
+                    is_encrypt,
+                });
+            }
+            VALUE_KIND => {
+                let attribute_name = items[1].to_string();
+                let name = items[2].to_string();
+
+                let radius_value = RadiusValue {
+                    name,
+                    identifier: items[3].parse().unwrap(),
+                };
+
+                match radius_attribute_to_values.get_mut(&attribute_name) {
+                    None => {
+                        radius_attribute_to_values
+                            .insert(attribute_name.clone(), vec![radius_value]);
+                    }
+                    Some(vec) => {
+                        vec.push(radius_value);
+                    }
+                };
+            }
+            _ => return Err(format!("unexpected kind has come => {}", kind)),
+        }
+    }
+
+    Ok((radius_attributes, radius_attribute_to_values))
+}