340 lines
12 KiB
Rust
340 lines
12 KiB
Rust
use crate::config::Config;
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use crate::gandi::GandiAPI;
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use crate::ip_source::{ip_source::IPSource, ipify::IPSourceIpify};
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use clap::Parser;
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use config::IPSourceName;
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use ip_source::icanhazip::IPSourceIcanhazip;
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use ip_source::seeip::IPSourceSeeIP;
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use opts::Opts;
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use reqwest::{header, Client, ClientBuilder, StatusCode};
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use serde::Serialize;
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use std::{num::NonZeroU32, sync::Arc, time::Duration};
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use tokio::join;
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use tokio::{self, task::JoinHandle, time::sleep};
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mod config;
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mod gandi;
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mod ip_source;
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mod opts;
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use die_exit::*;
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/// 30 requests per minute, see https://api.gandi.net/docs/reference/
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const GANDI_RATE_LIMIT: u32 = 30;
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/// If we hit the rate limit, wait up to this many seconds before next attempt
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const GANDI_DELAY_JITTER: u64 = 20;
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fn api_client(api_key: &str) -> anyhow::Result<Client> {
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let client_builder = ClientBuilder::new();
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let key = format!("Apikey {}", api_key);
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let mut auth_value = header::HeaderValue::from_str(&key)?;
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let mut headers = header::HeaderMap::new();
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auth_value.set_sensitive(true);
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headers.insert(header::AUTHORIZATION, auth_value);
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let accept_value = header::HeaderValue::from_static("application/json");
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headers.insert(header::ACCEPT, accept_value);
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let client = client_builder.default_headers(headers).build()?;
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Ok(client)
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}
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#[derive(Serialize)]
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pub struct APIPayload {
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pub rrset_values: Vec<String>,
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pub rrset_ttl: u32,
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}
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async fn run(
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base_url: &str,
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ip_source: &Box<dyn IPSource>,
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conf: &Config,
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opts: &Opts,
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) -> anyhow::Result<()> {
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let mut last_ipv4: Option<String> = None;
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let mut last_ipv6: Option<String> = None;
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loop {
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println!("Finding out the IP address...");
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let (ipv4_result, ipv6_result) = join!(ip_source.get_ipv4(), ip_source.get_ipv6());
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let ipv4 = ipv4_result.as_ref();
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let ipv6 = ipv6_result.as_ref();
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println!("Found these:");
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match ipv4 {
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Ok(ip) => println!("\tIPv4: {}", ip),
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Err(err) => eprintln!("\tIPv4 failed: {}", err),
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}
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match ipv6 {
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Ok(ip) => println!("\tIPv6: {}", ip),
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Err(err) => eprintln!("\tIPv6 failed: {}", err),
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}
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let ipv4_same = last_ipv4
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.as_ref()
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.map(|p| ipv4.map(|q| p == q).unwrap_or(false))
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.unwrap_or(false);
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let ipv6_same = last_ipv6
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.as_ref()
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.map(|p| ipv6.map(|q| p == q).unwrap_or(false))
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.unwrap_or(false);
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last_ipv4 = ipv4.ok().map(|v| v.to_string());
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last_ipv6 = ipv6.ok().map(|v| v.to_string());
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if !ipv4_same || !ipv6_same || conf.always_update {
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let client = api_client(&conf.api_key)?;
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let mut tasks: Vec<JoinHandle<(StatusCode, String)>> = Vec::new();
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println!("Attempting to update DNS entries now");
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let governor = Arc::new(governor::RateLimiter::direct(governor::Quota::per_minute(
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NonZeroU32::new(GANDI_RATE_LIMIT).die("Governor rate is 0"),
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)));
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let retry_jitter =
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governor::Jitter::new(Duration::ZERO, Duration::from_secs(GANDI_DELAY_JITTER));
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for entry in &conf.entry {
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for entry_type in Config::types(entry) {
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let fqdn = Config::fqdn(entry, conf).to_string();
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let url = GandiAPI {
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fqdn: &fqdn,
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rrset_name: &entry.name,
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rrset_type: entry_type,
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base_url,
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}
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.url();
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let ip = match entry_type {
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"A" => ipv4.die_with(|error| format!("Needed IPv4 for {fqdn}: {error}")),
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"AAAA" => ipv6.die_with(|error| format!("Needed IPv6 for {fqdn}: {error}")),
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bad_entry_type => die!("Unexpected type in config: {}", bad_entry_type),
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};
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let payload = APIPayload {
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rrset_values: vec![ip.to_string()],
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rrset_ttl: Config::ttl(entry, conf),
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};
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let req = client.put(url).json(&payload);
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let task_governor = governor.clone();
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let entry_type = entry_type.to_string();
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let task = tokio::task::spawn(async move {
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task_governor.until_ready_with_jitter(retry_jitter).await;
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println!("Updating {} record for {}", entry_type, &fqdn);
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match req.send().await {
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Ok(response) => (
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response.status(),
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response
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.text()
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.await
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.unwrap_or_else(|error| error.to_string()),
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),
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Err(error) => (StatusCode::IM_A_TEAPOT, error.to_string()),
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}
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});
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tasks.push(task);
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}
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}
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let results = futures::future::try_join_all(tasks).await?;
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println!("Updates done for {} entries", results.len());
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for (status, body) in results {
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println!("{} - {}", status, body);
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}
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} else {
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println!("IP address has not changed since last update");
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}
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if let Some(repeat) = opts.repeat {
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// If configured to repeat, do so
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sleep(Duration::from_secs(repeat)).await;
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continue;
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}
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// Otherwise this is one-shot, we should exit now
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break;
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}
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Ok(())
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}
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#[tokio::main(flavor = "current_thread")]
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async fn main() -> anyhow::Result<()> {
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let opts = opts::Opts::parse();
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let conf = config::load_config(&opts)
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.die_with(|error| format!("Failed to read config file: {}", error));
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let ip_source: Box<dyn IPSource> = match conf.ip_source {
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IPSourceName::Ipify => Box::new(IPSourceIpify),
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IPSourceName::Icanhazip => Box::new(IPSourceIcanhazip),
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IPSourceName::SeeIP => Box::new(IPSourceSeeIP),
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};
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config::validate_config(&conf).die_with(|error| format!("Invalid config: {}", error));
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run("https://api.gandi.net", &ip_source, &conf, &opts).await?;
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Ok(())
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}
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#[cfg(test)]
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mod tests {
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use std::{env::temp_dir, time::Duration};
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use crate::{config, ip_source::ip_source::IPSource, opts::Opts, run};
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use async_trait::async_trait;
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use httpmock::MockServer;
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use tokio::{fs, task::LocalSet, time::sleep};
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struct IPSourceMock;
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#[async_trait]
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impl IPSource for IPSourceMock {
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async fn get_ipv4(&self) -> anyhow::Result<String> {
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Ok("192.168.0.0".to_string())
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}
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async fn get_ipv6(&self) -> anyhow::Result<String> {
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Ok("fe80:0000:0208:74ff:feda:625c".to_string())
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}
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}
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#[tokio::test]
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async fn single_shot() {
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let mut temp = temp_dir().join("gandi-live-dns-test");
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fs::create_dir_all(&temp)
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.await
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.expect("Failed to create test dir");
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temp.push("test.toml");
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fs::write(
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&temp,
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"fqdn = \"example.com\"\napi_key = \"xxx\"\nttl = 300\n[[entry]]\nname =\"@\"\n",
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)
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.await
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.expect("Failed to write test config file");
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let fqdn = "example.com";
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let rname = "@";
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let rtype = "A";
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let server = MockServer::start();
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let mock = server.mock(|when, then| {
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when.method("PUT")
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.path(format!(
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"/v5/livedns/domains/{fqdn}/records/{rname}/{rtype}"
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))
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.body_contains("192.168.0.0");
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then.status(200);
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});
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let opts = Opts {
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config: Some(temp.to_string_lossy().to_string()),
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..Opts::default()
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};
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let conf = config::load_config(&opts).expect("Failed to load config");
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let ip_source: Box<dyn IPSource> = Box::new(IPSourceMock);
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run(server.base_url().as_str(), &ip_source, &conf, &opts)
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.await
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.expect("Failed when running the update");
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// Assert
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mock.assert();
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}
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#[test]
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fn repeat() {
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let runtime = tokio::runtime::Builder::new_current_thread()
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.enable_all()
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.build()
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.unwrap();
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LocalSet::new().block_on(&runtime, async {
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let mut temp = temp_dir().join("gandi-live-dns-test");
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fs::create_dir_all(&temp)
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.await
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.expect("Failed to create test dir");
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temp.push("test.toml");
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fs::write(
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&temp,
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"fqdn = \"example.com\"\napi_key = \"xxx\"\nttl = 300\n[[entry]]\nname =\"@\"\n",
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)
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.await
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.expect("Failed to write test config file");
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let fqdn = "example.com";
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let rname = "@";
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let rtype = "A";
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let server = MockServer::start();
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let mock = server.mock(|when, then| {
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when.method("PUT")
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.path(format!(
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"/v5/livedns/domains/{fqdn}/records/{rname}/{rtype}"
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))
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.body_contains("192.168.0.0");
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then.status(200);
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});
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let server_url = server.base_url();
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let handle = tokio::task::spawn_local(async move {
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let opts = Opts {
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config: Some(temp.to_string_lossy().to_string()),
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repeat: Some(1),
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..Opts::default()
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};
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let conf = config::load_config(&opts).expect("Failed to load config");
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let ip_source: Box<dyn IPSource> = Box::new(IPSourceMock);
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run(&server_url, &ip_source, &conf, &opts)
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.await
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.expect("Failed when running the update");
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});
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sleep(Duration::from_secs(3)).await;
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handle.abort();
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// Only should update once because the IP doesn't change
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mock.assert();
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});
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}
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#[test]
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fn repeat_always_update() {
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let runtime = tokio::runtime::Builder::new_current_thread()
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.enable_all()
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.build()
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.unwrap();
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LocalSet::new().block_on(&runtime, async {
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let mut temp = temp_dir().join("gandi-live-dns-test");
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fs::create_dir_all(&temp)
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.await
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.expect("Failed to create test dir");
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temp.push("test.toml");
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fs::write(
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&temp,
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"fqdn = \"example.com\"\nalways_update = true\napi_key = \"xxx\"\nttl = 300\n[[entry]]\nname =\"@\"\n",
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)
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.await
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.expect("Failed to write test config file");
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let fqdn = "example.com";
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let rname = "@";
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let rtype = "A";
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let server = MockServer::start();
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let mock = server.mock(|when, then| {
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when.method("PUT")
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.path(format!(
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"/v5/livedns/domains/{fqdn}/records/{rname}/{rtype}"
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))
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.body_contains("192.168.0.0");
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then.status(200);
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});
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let server_url = server.base_url();
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let handle = tokio::task::spawn_local(async move {
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let opts = Opts {
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config: Some(temp.to_string_lossy().to_string()),
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repeat: Some(1),
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..Opts::default()
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};
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let conf = config::load_config(&opts).expect("Failed to load config");
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let ip_source: Box<dyn IPSource> = Box::new(IPSourceMock);
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run(&server_url, &ip_source, &conf, &opts)
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.await
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.expect("Failed when running the update");
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});
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sleep(Duration::from_secs(3)).await;
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handle.abort();
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// Should update multiple times since always_update
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assert!(mock.hits() > 1);
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});
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}
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}
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