/
connect.rs
157 lines (133 loc) · 4.49 KB
/
connect.rs
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use std::{sync::Arc, time::Duration};
use anyhow::Context;
use clone_macro::clone;
use futures_util::{future::select_all, FutureExt, TryFutureExt};
use itertools::Itertools;
use once_cell::sync::Lazy;
use rand::Rng;
use smol::prelude::*;
use smolscale::immortal::{Immortal, RespawnStrategy};
use crate::{
config::{get_conninfo_store, ConnectOpt},
connect::tunnel::{BinderTunnelParams, ClientTunnel, EndpointSource},
conninfo_store::ConnInfoStore,
};
use crate::debugpack::DebugPack;
mod dns;
mod port_forwarder;
mod socks5;
mod stats;
mod tunnel;
mod vpn;
pub struct ConnectDaemon {
ctx: ConnectContext,
_task: Immortal,
}
impl ConnectDaemon {
/// Starts a new ConnectClient. If initialization fails, returns an error.
pub async fn start(opt: ConnectOpt) -> anyhow::Result<Self> {
log::info!(
"connect mode starting: exit = {:?}, force_protocol = {:?}, use_bridges = {}",
opt.exit_server,
opt.force_protocol,
opt.use_bridges
);
let conn_info = Arc::new(
get_conninfo_store(
&opt.common,
&opt.auth,
opt.exit_server
.as_ref()
.context("no exit server provided")?,
)
.await?,
);
let endpoint = {
if let Some(override_url) = opt.override_connect.clone() {
EndpointSource::Independent {
endpoint: override_url,
}
} else {
EndpointSource::Binder(
conn_info.clone(),
BinderTunnelParams {
exit_server: opt.exit_server.clone(),
use_bridges: opt.use_bridges,
force_bridge: opt.force_bridge,
force_protocol: opt.force_protocol.clone(),
},
)
}
};
let tunnel = ClientTunnel::new(endpoint, |_| {}).into();
let ctx = ConnectContext {
conn_info,
tunnel,
opt: opt.clone(),
debug: Arc::new(DebugPack::new(&opt.common.debugpack_path)?),
};
Ok(Self {
ctx: ctx.clone(),
_task: Immortal::respawn(
RespawnStrategy::JitterDelay(Duration::from_secs(1), Duration::from_secs(5)),
clone!([ctx], move || connect_loop(ctx.clone())
.map_err(|e| log::error!("connect_loop restart: {:?}", e))),
),
})
}
/// Gets a handle to the debug pack from the outside.
pub fn debug(&self) -> &DebugPack {
&self.ctx.debug
}
}
#[derive(Clone)]
pub struct ConnectContext {
opt: ConnectOpt,
conn_info: Arc<ConnInfoStore>,
tunnel: Arc<ClientTunnel>,
debug: Arc<DebugPack>,
}
static METRIC_SESSION_ID: Lazy<i64> = Lazy::new(|| {
let mut rng = rand::thread_rng();
rng.gen()
});
async fn connect_loop(ctx: ConnectContext) -> anyhow::Result<()> {
let socks2http = smolscale::spawn(crate::socks2http::run_tokio(ctx.opt.http_listen, {
let mut addr = ctx.opt.socks5_listen;
addr.set_ip("127.0.0.1".parse().unwrap());
addr
}));
let socks5 = smolscale::spawn(socks5::socks5_loop(ctx.clone()));
let dns = smolscale::spawn(dns::dns_loop(ctx.clone(), ctx.opt.dns_listen));
let forward_ports = ctx
.opt
.forward_ports
.iter()
.map(|v| smolscale::spawn(port_forwarder::port_forwarder(ctx.clone(), v.clone())))
.chain(std::iter::once(smolscale::spawn(smol::future::pending()))) // ensures there's at least one
.collect_vec();
let refresh = smolscale::spawn(clone!([ctx], async move {
if ctx.opt.override_connect.is_none() {
loop {
log::debug!("about to refresh...");
if let Err(err) = ctx.conn_info.refresh().await {
log::warn!("error refreshing store: {:?}", err);
}
smol::Timer::after(Duration::from_secs(120)).await;
}
} else {
smol::future::pending().await
}
}));
let vpn = smolscale::spawn(vpn::vpn_loop(ctx.clone()));
let stats = smolscale::spawn(stats::serve_stats_loop(ctx.clone()));
socks2http
.race(socks5)
.race(dns)
.race(refresh)
.race(select_all(forward_ports).map(|s| s.0))
.race(vpn)
.race(stats)
.await?;
anyhow::bail!("somehow ran off the edge of a cliff")
}