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use std::rc::Rc;
use std::sync::Arc;
use std::path::Path;
use std::net::SocketAddr;
use std::cell::UnsafeCell;
use std::collections::VecDeque;
use std::time::{Instant, SystemTime};
use std::io::{Error, Result, ErrorKind};
use futures::future::{FutureExt, LocalBoxFuture};
use quinn_proto::{EndpointConfig, ServerConfig, Endpoint, EndpointEvent, ConnectionHandle, TransportConfig};
use crossbeam_channel::{Sender, unbounded};
use futures::task::SpawnExt;
use rustls;
use log::warn;
use pi_async_rt::rt::serial_local_thread::LocalTaskRuntime;
use pi_hash::XHashMap;
use udp::{AsyncService, SocketHandle, TaskResult};
use crate::{AsyncService as QuicAsyncService, QuicEvent,
acceptor::QuicAcceptor,
connect_pool::{EndPointPoller, QuicSocketPool},
utils::{load_certs_file, load_key_file}};
use crate::connect::QuicSocket;
///
/// Quic连接监听器
///
pub struct QuicListener(Arc<InnerQuicListener>);
unsafe impl Send for QuicListener {}
unsafe impl Sync for QuicListener {}
impl Clone for QuicListener {
fn clone(&self) -> Self {
QuicListener(self.0.clone())
}
}
impl AsyncService for QuicListener {
fn bind_runtime(&mut self, _rt: LocalTaskRuntime<()>) {
}
fn handle_binded(&self,
_handle: SocketHandle,
_result: Result<()>) -> LocalBoxFuture<'static, ()> {
async move {
}.boxed_local()
}
fn handle_received(&self,
handle: SocketHandle,
result: Result<(Vec<u8>, Option<SocketAddr>)>) -> LocalBoxFuture<'static, ()> {
let listener = self.clone();
async move {
match result {
Err(e) => {
//Udp接收数据失败
handle.close(Err(Error::new(ErrorKind::Other,
format!("Receive udp failed, uid: {:?}, remote: {:?}, local: {:?}, reason: {:?}",
handle.get_uid(),
handle.get_remote(),
handle.get_local(),
e))));
},
Ok((bin, active_peer)) => {
//Udp接收数据成功
if let Some((connection_handle, event)) = listener
.0
.acceptor
.accept(handle,
bin,
active_peer,
listener.0.readed_read_size_limit,
listener.0.readed_write_size_limit) {
//处理Socket事件
if let Some(event_sent) = &listener
.0
.event_sents
.get(&(connection_handle.0 % listener.0.event_sents.len())) {
//向连接所在连接池发送Socket事件
let _= event_sent
.send(QuicEvent::ConnectionReceived(connection_handle, event));
}
}
},
}
}.boxed_local()
}
fn handle_sended(&self,
_handle: SocketHandle,
_result: Result<usize>) -> LocalBoxFuture<'static, ()> {
async move {
}.boxed_local()
}
fn handle_closed(&self,
_handle: SocketHandle,
_result: Result<()>) -> LocalBoxFuture<'static, ()> {
async move {
}.boxed_local()
}
}
impl EndPointPoller for QuicListener {
fn poll(&self,
socket: &QuicSocket,
handle: ConnectionHandle,
events: VecDeque<EndpointEvent>) {
let listener = self.clone();
let _ = socket
.get_udp_handle()
.spawn(async move {
handle_endpoint_events(listener,
handle,
events);
TaskResult::Continue
}.boxed_local());
}
}
impl QuicListener {
/// 构建一个Quic连接监听器
/// timeout可以在运行时与udp不是同一个运行时设置，避免连接池事件循环空载
pub fn new<P: AsRef<Path>>(runtimes: Vec<LocalTaskRuntime<()>>,
server_certs_path: P,
server_key_path: P,
verify_level: ClientCertVerifyLevel,
config: EndpointConfig,
readed_read_size_limit: usize,
readed_write_size_limit: usize,
concurrent_connections: u32,
transport_config: Option<Arc<TransportConfig>>,
service: Arc<dyn QuicAsyncService>,
timeout: u64) -> Result<Self> {
match load_certs_file(server_certs_path) {
Err(e) => {
//加载指定的证书失败，则立即返回错误原因
Err(e)
},
Ok(certs) => {
//加载指定的证书成功
match load_key_file(server_key_path) {
Err(e) => {
//加载指定的私钥失败，则立即返回错误原因
Err(e)
},
Ok(key) => {
//加载指定的私钥成功
let mut server_config = match verify_level {
ClientCertVerifyLevel::Ignore => {
//不需要严格验证客户端证书
match ServerConfig::with_single_cert(certs, key) {
Err(e) => {
//创建服务端配置失败，则立即返回错误原因
return Err(Error::new(ErrorKind::Other,
format!("Create quic server failed, client_verify_level: ignore, reason: {:?}",
e)))
},
Ok(config) => {
config
},
}
},
ClientCertVerifyLevel::Custom(verifier) => {
//需要验证客户端证书，使用指定的自定义验证器
match rustls::ServerConfig::builder()
.with_safe_default_cipher_suites()
.with_safe_default_kx_groups()
.with_protocol_versions(&[&rustls::version::TLS13])
.unwrap()
.with_client_cert_verifier(verifier)
.with_single_cert(certs, key) {
Err(e) => {
//创建服务端配置失败，则立即返回错误原因
return Err(Error::new(ErrorKind::Other,
format!("Create quic server failed, client_verify_level: custom, reason: {:?}",
e)))
},
Ok(config) => {
ServerConfig::with_crypto(Arc::new(config))
}
}
},
};
//创建Quic状态机
server_config.concurrent_connections(concurrent_connections); //设置最大并发连接数
if let Some(transport) = transport_config {
//使用外部自定义传输配置
server_config.transport = transport;
}
let end_point = Rc::new(UnsafeCell::new(Endpoint::new(Arc::new(config), Some(Arc::new(server_config)))));
//创建Quic连接接受器
let clock = Instant::now();
let runtimes_len = runtimes.len();
let mut event_sents = XHashMap::default();
let mut event_pairs = VecDeque::with_capacity(runtimes_len);
let mut router = Vec::with_capacity(runtimes_len);
for pool_id in 0..runtimes_len {
let (event_send, event_recv) = unbounded();
router.push(event_send.clone());
event_sents.insert(pool_id, event_send.clone());
event_pairs.push_back((event_send, event_recv));
}
let acceptor
= QuicAcceptor::new(end_point.clone(), router, clock);
let inner = InnerQuicListener {
rt: None,
runtimes: runtimes.clone(),
acceptor,
event_sents,
end_point,
readed_read_size_limit,
readed_write_size_limit,
clock,
};
let listener = QuicListener(Arc::new(inner));
//创建服务端配置成功
let mut pool_id = 0;
for rt in runtimes {
//创建并运行连接池
let (event_send, event_recv) = event_pairs.pop_front().unwrap();
let connect_pool = QuicSocketPool::new(pool_id,
listener.clone(),
event_send,
event_recv,
service.clone(),
clock,
timeout);
connect_pool.run(rt);
pool_id += 1; //更新连接池唯一id
}
Ok(listener)
},
}
},
}
}
/// 关闭Quic连接监听器
pub fn close(self, reason: Result<()>) {
for runtime in self.0.runtimes.clone() {
let _ = runtime.close();
}
if let Some(rt) = self.0.rt.as_ref() {
let _ = rt.clone().close();
}
warn!("Closed quic socket listener, reason: {:?}", reason);
}
}
// 处理Quic连接监听器端点事件
fn handle_endpoint_events(listener: QuicListener,
connection_handle: ConnectionHandle,
endpoint_events: VecDeque<EndpointEvent>) {
for endpoint_event in endpoint_events {
if endpoint_event.is_drained() {
//TODO 当前连接已被清理...
continue;
}
unsafe {
let end_point = &mut *listener.0.end_point.get();
let index = connection_handle.0 % listener.0.event_sents.len(); //路由到指定连接池
if let Some(event) = end_point.handle_event(connection_handle, endpoint_event) {
if let Some(sender) = listener.0.event_sents.get(&index) {
//向连接所在连接池发送Socket事件
let _ = sender
.send(QuicEvent::ConnectionReceived(connection_handle, event));
while let Some(transmit) = end_point.poll_transmit() {
//向连接所在连接池发送Socket发送事件
let _ = sender
.send(QuicEvent::ConnectionSend(connection_handle, transmit));
}
}
}
}
}
}
// 内部Quic连接监听器
struct InnerQuicListener {
rt: Option<LocalTaskRuntime<()>>, //运行时
runtimes: Vec<LocalTaskRuntime<()>>, //连接运行时
acceptor: QuicAcceptor, //Quic连接接受器
event_sents: XHashMap<usize, Sender<QuicEvent>>, //Quic事件发送器表
end_point: Rc<UnsafeCell<Endpoint>>, //Quic端点
readed_read_size_limit: usize, //Quic已读读缓冲大小限制
readed_write_size_limit: usize, //Quic已读写缓冲大小限制
clock: Instant, //内部时钟
}
///
/// 客户端证书验证级别
///
pub enum ClientCertVerifyLevel {
Ignore, //忽略验证
Custom(Arc<dyn rustls::server::ClientCertVerifier>), //自定义验证
}
// 非可靠客户端证书验证器
struct InsecureClientCertVerifier;
impl rustls::server::ClientCertVerifier for InsecureClientCertVerifier {
fn client_auth_root_subjects(&self) -> Option<rustls::DistinguishedNames> {
None
}
fn verify_client_cert(&self,
_end_entity: &rustls::Certificate,
_intermediates: &[rustls::Certificate],
_now: SystemTime) -> std::result::Result<rustls::server::ClientCertVerified, rustls::Error> {
Ok(rustls::server::ClientCertVerified::assertion())
}
}