-// API Reference: https://api.gandi.net/docs/livedns/
-// Some inspiration: https://github.com/rmarchant/gandi-ddns/blob/master/gandi_ddns.py
+/*
+ * API Reference: https://api.gandi.net/docs/livedns/
+ * Some similar implementations:
+ * - https://github.com/rmarchant/gandi-ddns/blob/master/gandi_ddns.py
+ * - https://github.com/brianhp2/gandi-automatic-dns
+ *
+ * TODO:
+ * - Log to stdout with (at least) timestamps.
+ * - Renew function.
+ */
+#![cfg_attr(debug_assertions, allow(unused_variables, unused_imports, dead_code))]
-fn main() {
- println!("Hello, world!");
+use std::{ fs::File, net::{ IpAddr, Ipv4Addr }, thread, time };
+use ron::{ de::from_reader, ser::to_writer };
+use serde::{ Deserialize, Serialize };
+use serde_json::{ Value, json };
+
+// A generic result of type 'T'.
+type Result<T> = std::result::Result<T, Box<dyn std::error::Error>>;
+
+#[derive(Debug)]
+struct Error {
+ message: String
}
-fn get_real_ip() {
+impl std::fmt::Display for Error {
+ fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+ write!(f, "Error: {}", &self.message)
+ }
+}
+impl std::error::Error for Error { }
+
+#[derive(Debug, Clone, Deserialize, Serialize)]
+struct Config {
+ delay_between_check: time::Duration,
+ api_key: String,
+ fqdn: String,
+ domains: Vec<String>,
+ ttl: i32
}
-fn get_current_record_ip() {
+impl Config {
+ fn default() -> Self {
+ Config { delay_between_check: time::Duration::from_secs(120), api_key: String::from(""), fqdn: String::from(""), domains: Vec::new(), ttl: 300 }
+ }
+
+ fn read(file_path: &str) -> Result<Config> {
+ match File::open(file_path) {
+ Ok(file) => from_reader(file).map_err(|e| e.into()),
+ // The file doesn't exit -> create it with default values.
+ Err(_) => {
+ let file = File::create(file_path)?;
+ let default_config = Config::default();
+ to_writer(file, &default_config)?;
+ Ok(default_config)
+ }
+ }
+ }
+}
+
+const FILE_CONF: &str = "config.ron";
+
+fn main() -> Result<()> {
+
+ println!("GANDI DynDNS");
+ let config = Config::read(FILE_CONF)?;
+
+ println!("Configuration: {:?}", Config { api_key: String::from("*****"), ..config.clone() });
+
+ loop {
+ let time_beginning_loop = time::Instant::now();
+
+ if let Err(err) = check_and_update_dns(&config.api_key, &config.fqdn, &config.domains, config.ttl) {
+ println!("!! Error: {}", err);
+ }
+
+ let elapsed = time::Instant::now() - time_beginning_loop;
+
+ if elapsed < config.delay_between_check {
+ let to_wait = config.delay_between_check - elapsed;
+ thread::sleep(to_wait);
+ }
+ }
}
-fn update_record_ip() {
+fn check_and_update_dns(api_key: &str, fqdn: &str, domains: &Vec<String>, ttl: i32) -> Result<()> {
+ let real_ip = get_real_ip()?;
+
+ for domain in domains {
+ let current_ip = get_current_record_ip(api_key, domain, fqdn)?;
+
+ if real_ip != current_ip {
+ println!("IP addresses don't match for domain {}: real = {}, dns = {}. Renewing DNS...", domain, real_ip, current_ip);
+ update_record_ip(api_key, domain, fqdn, real_ip, ttl)?;
+ println!("Renewing of {} successfully", domain);
+ }
+ }
+
+ Ok(())
+}
+
+fn get_real_ip() -> Result<Ipv4Addr> {
+
+ let url = "https://api.ipify.org";
+ let client = reqwest::blocking::Client::new();
+
+ match client.get(url).send() {
+ Ok(resp) =>
+ if resp.status().is_success() {
+ let content = resp.text().unwrap();
+ match content.parse::<IpAddr>() {
+ Ok(IpAddr::V4(ip_v4)) => Ok(ip_v4),
+ _ => Err(Box::new(Error { message: String::from("Can't parse IPv4 from ipify") }))
+ }
+ } else {
+ Err(Box::new(Error { message: format!("Request unsuccessful: {:#?}", resp) }))
+ },
+
+ Err(error) => {
+ Err(Box::new(Error { message: format!("Error during request: {:?}", error) }))
+ }
+ }
+}
+
+enum Method {
+ Put(String),
+ Get
+}
+
+fn request_livedns_gandi(api_key: &str, url_fragment: &str, method: Method) -> Result<Value> {
+ let url = format!("https://api.gandi.net/v5/livedns/{}", url_fragment);
+ let client = reqwest::blocking::Client::new();
+
+ let request_builder =
+ match method {
+ Method::Put(body) => client.put(url).body(body),
+ Method::Get => client.get(url)
+ };
+
+ match request_builder.header("Authorization", format!("Apikey {}", api_key)).send() {
+ Ok(resp) =>
+ if resp.status().is_success() {
+ let content = resp.text().unwrap();
+ Ok(serde_json::from_str(&content).unwrap())
+ } else {
+ Err(Box::new(Error { message: format!("Request unsuccessful: {:#?}", resp) }))
+ },
+ Err(error) =>
+ Err(Box::new(Error { message: format!("Error during request: {:?}", error) }))
+ }
+}
+
+fn get_current_record_ip(api_key: &str, name: &str, fqdn: &str) -> Result<Ipv4Addr> {
+ let json_value = request_livedns_gandi(api_key, &format!("domains/{}/records/{}/A", fqdn, name), Method::Get)?;
+
+ match &json_value["rrset_values"][0] {
+ Value::String(ip_str) =>
+ Ok(ip_str.parse()?),
+ _ =>
+ Result::Err(Box::new(Error { message: format!("Unable to extract the IP from the JSON answer: {}", json_value) }))
+ }
+}
+
+fn update_record_ip(api_key: &str, name: &str, fqdn: &str, ip: Ipv4Addr, ttl: i32) -> Result<()> {
+ let json_body =
+ json!(
+ {
+ "rrset_values": [ format!("{}", ip) ],
+ "rrset_ttl": ttl
+ }
+ );
+
+ let json_value = request_livedns_gandi(api_key, &format!("domains/{}/records/{}/A", fqdn, name), Method::Put(json_body.to_string()))?;
+
+ println!("Update response: {}", json_value);
+ Ok(())
}
projects / gandi_dns_update.git / blobdiff