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use std::{
time::Duration,
};
use async_std::{
sync::{Arc, Weak},
task
};
use cyfs_base::*;
use crate::{
history::keystore::{self, Keystore},
protocol::*,
};
use super::{
command::*,
proxy::{self, ProxyTunnelManager, ProxyDeviceStub},
events::ProxyServiceEvents
};
pub struct Config {
keystore: keystore::Config,
tunnel: proxy::Config
}
impl Default for Config {
fn default() -> Self {
Self {
keystore: keystore::Config {
active_time: Duration::from_secs(300),
capacity: 10000,
},
tunnel: proxy::Config {
keepalive: Duration::from_secs(5 * 60)
}
}
}
}
struct DefaultEvents {
}
#[async_trait::async_trait]
impl ProxyServiceEvents for DefaultEvents {
async fn pre_create_tunnel(&self, _mix_key: &AesKey, _device_pair: &(ProxyDeviceStub, ProxyDeviceStub)) -> BuckyResult<()> {
Ok(())
}
}
struct ServiceImpl {
keystore: Keystore,
command_tunnel: Option<CommandTunnel>,
proxy_tunnels: ProxyTunnelManager,
events: Box<dyn ProxyServiceEvents>
}
#[derive(Clone)]
pub struct Service(Arc<ServiceImpl>);
#[derive(Clone)]
pub(super) struct WeakService(Weak<ServiceImpl>);
impl From<&WeakService> for Service {
fn from(w: &WeakService) -> Self {
Self(w.0.upgrade().unwrap())
}
}
impl std::fmt::Display for Service {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "Service")
}
}
impl Service {
pub async fn start(
local_device: Device,
local_secret: PrivateKey,
proxy_ports: Vec<(SocketAddr, Option<SocketAddr>)>,
config: Option<Config>,
events: Option<Box<dyn ProxyServiceEvents>>) -> BuckyResult<Service> {
info!("will start pn service device:{}", local_device.desc().device_id());
let config = config.unwrap_or_default();
let signer = RsaCPUObjectSigner::new(
local_device.desc().public_key().clone(),
local_secret.clone(),
);
let service = Self(Arc::new(ServiceImpl {
keystore: Keystore::new(
local_secret,
local_device.desc().clone(),
signer,
config.keystore.clone()),
command_tunnel: None,
proxy_tunnels: ProxyTunnelManager::open(config.tunnel.clone(), proxy_ports.as_slice())?,
events: events.unwrap_or(Box::new(DefaultEvents {}))
}));
let command_port = local_device.connect_info().endpoints()[0];
let service_impl = unsafe { &mut *(Arc::as_ptr(&service.0) as *mut ServiceImpl) };
service_impl.command_tunnel = Some(CommandTunnel::open(service.to_weak(), command_port)?);
Ok(service)
}
pub(super) fn command_tunnel(&self) -> &CommandTunnel {
&self.0.command_tunnel.as_ref().unwrap()
}
pub(super) fn proxy_tunnels(&self) -> &ProxyTunnelManager {
&self.0.proxy_tunnels
}
pub(super) fn keystore(&self) -> &Keystore {
&self.0.keystore
}
fn events(&self) -> &Box<dyn ProxyServiceEvents> {
&self.0.events
}
fn to_weak(&self) -> WeakService {
WeakService(Arc::downgrade(&self.0))
}
}
impl OnPackage<SynProxy, (&PackageBox, &SocketAddr)> for Service {
fn on_package(&self, syn_proxy: &SynProxy, context: (&PackageBox, &SocketAddr)) -> BuckyResult<OnPackageResult> {
let (in_box, from) = context;
trace!("{} got {} from {:?}", self, syn_proxy, from);
let service = self.clone();
let syn_proxy = syn_proxy.clone();
let from = *from;
let key = in_box.key().clone();
task::spawn(async move {
let stub_pair = (ProxyDeviceStub {
id: syn_proxy.from_peer_info.desc().device_id(),
timestamp: syn_proxy.from_peer_info.body().as_ref().unwrap().update_time(),
},
ProxyDeviceStub {
id: syn_proxy.to_peer_id.clone(),
timestamp: syn_proxy.to_peer_timestamp,
}
);
let filter_result = service.events().pre_create_tunnel(&syn_proxy.mix_key, &stub_pair).await;
match filter_result {
Ok(_) => {
let ret = service.proxy_tunnels().create_tunnel(&syn_proxy.mix_key, stub_pair);
let _ = service.command_tunnel().ack_proxy(ret, &syn_proxy, &from, &key);
},
Err(err) => {
let _ = service.command_tunnel().ack_proxy(Err(err), &syn_proxy, &from, &key);
}
}
});
Ok(OnPackageResult::Handled)
}
}