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/*
This file is part of gnix (https://codeberg.org/metamuffin/gnix)
which is licensed under the GNU Affero General Public License (version 3); see /COPYING.
Copyright (C) 2025 metamuffin <metamuffin.org>
*/
use crate::{
certs::CertPackage,
deser_helpers::{seq_or_not, string_or_seq},
modules::{Node, MODULES},
};
use anyhow::{anyhow, bail, Context, Result};
use rand::random;
use serde::{de::DeserializeOwned, Deserialize, Serialize};
use serde_yml::Value;
use std::{
fs::read_to_string,
net::SocketAddr,
path::{Path, PathBuf},
sync::Arc,
};
#[derive(Serialize, Deserialize)]
pub struct Config {
pub http: Option<HttpConfig>,
pub https: Option<HttpsConfig>,
#[serde(default = "random_bytes")]
pub private_key: [u8; 32],
#[serde(default)]
pub limits: Limits,
#[serde(default)]
pub source_ip_from_header: bool,
pub handler: DynNodeConfig,
#[serde(default)]
pub disable_server_header: bool,
}
fn random_bytes() -> [u8; 32] {
[(); 32].map(|_| random())
}
pub fn return_true() -> bool {
true
}
#[derive(Debug, Serialize, Deserialize)]
#[serde(default)]
pub struct Limits {
pub max_incoming_connections: usize,
pub max_outgoing_connections: usize,
pub max_incoming_connections_h3: usize,
pub max_requests_per_connnection: usize,
}
#[derive(Debug, Serialize, Deserialize)]
pub struct HttpConfig {
#[serde(deserialize_with = "string_or_seq")]
pub bind: Vec<SocketAddr>,
}
#[derive(Debug, Serialize, Deserialize)]
pub struct HttpsConfig {
#[serde(deserialize_with = "string_or_seq")]
pub bind: Vec<SocketAddr>,
#[serde(deserialize_with = "seq_or_not")]
pub cert_path: Vec<PathBuf>,
pub cert_fallback: Option<PathBuf>,
#[serde(default)]
pub disable_h3: bool,
#[serde(default)]
pub disable_h2: bool,
#[serde(default)]
pub disable_h1: bool,
}
#[derive(Serialize, Deserialize)]
pub struct ConfigPackage {
pub config: String,
pub certificates: Vec<CertPackage>, // name, fullchain, key
}
pub type DynNode = Arc<dyn Node>;
#[derive(Debug, Clone, Deserialize, Serialize)]
pub struct DynNodeConfig(serde_yml::Value);
impl DynNodeConfig {
pub fn parse<T: DeserializeOwned>(self) -> serde_yml::Result<T> {
serde_yml::from_value(self.0)
}
}
pub struct InstContext {
config: DynNodeConfig,
}
impl InstContext {
pub fn config(&self) -> DynNodeConfig {
self.config.clone()
}
pub fn instantiate_child(&self, config: DynNodeConfig) -> Result<DynNode> {
instantiate_handler(config)
}
}
impl Config {
pub fn new(raw: &str) -> Result<Self> {
Ok(serde_yml::from_str(&raw).context("parsing config YAML")?)
}
pub fn create_handler(&self) -> Result<DynNode> {
instantiate_handler(self.handler.clone())
}
}
fn instantiate_handler(config: DynNodeConfig) -> Result<DynNode> {
let Value::Tagged(tv) = config.0 else {
bail!("handler is not a tagged value")
};
let kind = tv.tag.string;
let cons = MODULES
.iter()
.find(|m| m.name() == kind)
.ok_or(anyhow!("unknown module name {kind:?}"))?;
cons.instantiate(InstContext {
config: DynNodeConfig(tv.value),
})
}
impl ConfigPackage {
pub fn new(entry: &Path) -> Result<Self> {
let config = read_to_string(entry).context("reading main config file")?;
let config_parsed: Config = serde_yml::from_str(&config).context("parsing config YAML")?;
let certificates = config_parsed
.https
.map(|h| CertPackage::create_from_recursive(&h.cert_path))
.transpose()?
.unwrap_or_default();
Ok(Self {
config,
certificates,
})
}
}
impl Default for Limits {
fn default() -> Self {
Self {
max_incoming_connections: 512,
max_incoming_connections_h3: 4096,
max_requests_per_connnection: 16,
max_outgoing_connections: 256,
}
}
}
// pub fn setup_file_watch(config_path: PathBuf, state: Arc<State>) {
// std::thread::spawn(move || {
// let mut inotify = Inotify::init().unwrap();
// inotify
// .watches()
// .add(
// config_path.parent().unwrap(),
// WatchMask::MODIFY | WatchMask::CREATE | WatchMask::DELETE | WatchMask::MOVED_TO,
// )
// .unwrap();
// let mut buffer = [0u8; 4096];
// loop {
// let events = inotify
// .read_events_blocking(&mut buffer)
// .expect("Failed to read inotify events");
// for event in events {
// if event.name == config_path.file_name() {
// if config_path.metadata().map(|m| m.len()).unwrap_or_default() == 0 {
// continue;
// }
// match Config::load(&config_path) {
// Ok(conf) => {
// let mut r = state.config.blocking_write();
// *r = Arc::new(conf)
// }
// Err(e) => error!("config has errors: {e:?}"),
// }
// }
// }
// }
// });
// }
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