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use std::fs::File;
use std::io::Read;
use std::net::{SocketAddr, ToSocketAddrs};
use std::time::Duration;
use anyhow::{anyhow, bail, Result};
use crate::config::{ConfigOpts, ConfigOptsAcme, ConfigOptsBase, ConfigOptsConsul};
// This code is inspired by the Trunk crate (https://github.com/thedodd/trunk)
// In this file, we take ConfigOpts and transform them into ready-to-use
// RuntimeConfig. We apply default values and business logic.
#[derive(Debug)]
pub struct RuntimeConfigAcme {
pub email: String,
}
#[derive(Debug)]
pub struct RuntimeConfigConsul {
pub node_name: String,
pub url: String,
pub tls: Option<(Option<reqwest::Certificate>, bool, reqwest::Identity)>,
}
#[derive(Debug)]
pub struct RuntimeConfigFirewall {
pub refresh_time: Duration,
}
#[derive(Debug)]
pub struct RuntimeConfigIgd {
pub private_ip: Option<String>,
pub expiration_time: Duration,
pub refresh_time: Duration,
}
#[derive(Debug)]
pub struct RuntimeConfigStun {
pub stun_server_v4: SocketAddr,
pub stun_server_v6: SocketAddr,
pub refresh_time: Duration,
}
#[derive(Debug)]
pub struct RuntimeConfig {
pub acme: Option<RuntimeConfigAcme>,
pub consul: RuntimeConfigConsul,
pub firewall: RuntimeConfigFirewall,
pub igd: RuntimeConfigIgd,
pub stun: RuntimeConfigStun,
}
impl RuntimeConfig {
pub fn new(opts: ConfigOpts) -> Result<Self> {
let acme = RuntimeConfigAcme::new(opts.acme)?;
let consul = RuntimeConfigConsul::new(opts.consul)?;
let firewall = RuntimeConfigFirewall::new(&opts.base)?;
let igd = RuntimeConfigIgd::new(&opts.base)?;
let stun = RuntimeConfigStun::new(&opts.base)?;
Ok(Self {
acme,
consul,
firewall,
igd,
stun,
})
}
}
impl RuntimeConfigAcme {
pub fn new(opts: ConfigOptsAcme) -> Result<Option<Self>> {
if !opts.enable {
return Ok(None);
}
let email = opts.email.expect(
"'DIPLONAT_ACME_EMAIL' environment variable is required if 'DIPLONAT_ACME_ENABLE' == 'true'",
);
Ok(Some(Self { email }))
}
}
impl RuntimeConfigConsul {
pub(super) fn new(opts: ConfigOptsConsul) -> Result<Self> {
let node_name = opts
.node_name
.expect("'DIPLONAT_CONSUL_NODE_NAME' environment variable is required");
let url = opts.url.unwrap_or(super::CONSUL_URL.to_string());
let tls = match (&opts.client_cert, &opts.client_key) {
(Some(client_cert), Some(client_key)) => {
let cert = match &opts.ca_cert {
Some(ca_cert) => {
let mut ca_cert_buf = vec![];
File::open(ca_cert)?.read_to_end(&mut ca_cert_buf)?;
Some(reqwest::Certificate::from_pem(&ca_cert_buf[..])?)
}
None => None,
};
let mut client_cert_buf = vec![];
File::open(client_cert)?.read_to_end(&mut client_cert_buf)?;
let mut client_key_buf = vec![];
File::open(client_key)?.read_to_end(&mut client_key_buf)?;
let ident =
reqwest::Identity::from_pem(&[&client_cert_buf[..], &client_key_buf[..]].concat()[..])?;
Some((cert, opts.tls_skip_verify, ident))
}
(None, None) => None,
_ => bail!("Incomplete TLS configuration parameters"),
};
Ok(Self {
node_name,
url,
tls,
})
}
}
impl RuntimeConfigFirewall {
pub(super) fn new(opts: &ConfigOptsBase) -> Result<Self> {
let refresh_time = Duration::from_secs(opts.refresh_time.unwrap_or(super::REFRESH_TIME).into());
Ok(Self { refresh_time })
}
}
impl RuntimeConfigIgd {
pub(super) fn new(opts: &ConfigOptsBase) -> Result<Self> {
let private_ip = opts.private_ip.clone();
let expiration_time = Duration::from_secs(
opts
.expiration_time
.unwrap_or(super::EXPIRATION_TIME)
.into(),
);
let refresh_time = Duration::from_secs(opts.refresh_time.unwrap_or(super::REFRESH_TIME).into());
if refresh_time.as_secs() * 2 > expiration_time.as_secs() {
return Err(anyhow!(
"IGD expiration time (currently: {}s) must be at least twice bigger than refresh time \
(currently: {}s)",
expiration_time.as_secs(),
refresh_time.as_secs()
));
}
Ok(Self {
private_ip,
expiration_time,
refresh_time,
})
}
}
impl RuntimeConfigStun {
pub(super) fn new(opts: &ConfigOptsBase) -> Result<Self> {
let mut stun_server_v4 = None;
let mut stun_server_v6 = None;
for addr in opts
.stun_server
.as_deref()
.unwrap_or(super::STUN_SERVER)
.to_socket_addrs()?
{
if addr.is_ipv4() {
stun_server_v4 = Some(addr);
}
if addr.is_ipv6() {
stun_server_v6 = Some(addr);
}
}
let refresh_time = Duration::from_secs(opts.refresh_time.unwrap_or(super::REFRESH_TIME).into());
Ok(Self {
stun_server_v4: stun_server_v4
.ok_or(anyhow!("Unable to resolve STUN server's IPv4 address"))?,
stun_server_v6: stun_server_v6
.ok_or(anyhow!("Unable to resolve STUN server's IPv6 address"))?,
refresh_time,
})
}
}
|
