rust/hedgewars-server/src/server/network.rs
author alfadur
Mon, 15 Apr 2019 21:22:51 +0300
changeset 14808 92225a708bda
parent 14801 f5d43f007970
child 14812 b2beb784e4b5
permissions -rw-r--r--
add client timeouts
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extern crate slab;
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use std::{
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    collections::HashSet,
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    io,
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    io::{Error, ErrorKind, Read, Write},
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    mem::{replace, swap},
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    net::{IpAddr, Ipv4Addr, SocketAddr},
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};
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use log::*;
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use mio::{
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    net::{TcpListener, TcpStream},
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    Poll, PollOpt, Ready, Token,
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};
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use mio_extras::timer;
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use netbuf;
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use slab::Slab;
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use super::{core::HWServer, coretypes::ClientId, handlers};
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use crate::{
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    protocol::{messages::*, ProtocolDecoder},
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    utils,
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};
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#[cfg(feature = "official-server")]
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use super::io::{IOThread, RequestId};
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use crate::server::handlers::{IoResult, IoTask};
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#[cfg(feature = "tls-connections")]
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use openssl::{
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    error::ErrorStack,
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    ssl::{
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        HandshakeError, MidHandshakeSslStream, Ssl, SslContext, SslContextBuilder, SslFiletype,
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        SslMethod, SslOptions, SslStream, SslStreamBuilder, SslVerifyMode,
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    },
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};
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use std::time::Duration;
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const MAX_BYTES_PER_READ: usize = 2048;
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const SEND_PING_TIMEOUT: Duration = Duration::from_secs(30);
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const DROP_CLIENT_TIMEOUT: Duration = Duration::from_secs(10);
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#[derive(Hash, Eq, PartialEq, Copy, Clone)]
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pub enum NetworkClientState {
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    Idle,
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    NeedsWrite,
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    NeedsRead,
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    Closed,
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}
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type NetworkResult<T> = io::Result<(T, NetworkClientState)>;
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#[cfg(not(feature = "tls-connections"))]
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pub enum ClientSocket {
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    Plain(TcpStream),
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}
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#[cfg(feature = "tls-connections")]
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pub enum ClientSocket {
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    SslHandshake(Option<MidHandshakeSslStream<TcpStream>>),
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    SslStream(SslStream<TcpStream>),
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}
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impl ClientSocket {
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    fn inner(&self) -> &TcpStream {
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        #[cfg(not(feature = "tls-connections"))]
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        match self {
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            ClientSocket::Plain(stream) => stream,
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        }
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        #[cfg(feature = "tls-connections")]
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        match self {
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            ClientSocket::SslHandshake(Some(builder)) => builder.get_ref(),
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            ClientSocket::SslHandshake(None) => unreachable!(),
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            ClientSocket::SslStream(ssl_stream) => ssl_stream.get_ref(),
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        }
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    }
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}
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pub struct NetworkClient {
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    id: ClientId,
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    socket: ClientSocket,
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    peer_addr: SocketAddr,
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    decoder: ProtocolDecoder,
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    buf_out: netbuf::Buf,
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    timeout: timer::Timeout,
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}
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impl NetworkClient {
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    pub fn new(
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        id: ClientId,
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        socket: ClientSocket,
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        peer_addr: SocketAddr,
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        timeout: timer::Timeout,
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    ) -> NetworkClient {
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        NetworkClient {
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            id,
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            socket,
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            peer_addr,
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            decoder: ProtocolDecoder::new(),
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            buf_out: netbuf::Buf::new(),
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            timeout,
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        }
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    }
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    #[cfg(feature = "tls-connections")]
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    fn handshake_impl(
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        &mut self,
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        handshake: MidHandshakeSslStream<TcpStream>,
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    ) -> io::Result<NetworkClientState> {
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        match handshake.handshake() {
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            Ok(stream) => {
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                self.socket = ClientSocket::SslStream(stream);
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                debug!(
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                    "TLS handshake with {} ({}) completed",
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                    self.id, self.peer_addr
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                );
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                Ok(NetworkClientState::Idle)
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            }
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            Err(HandshakeError::WouldBlock(new_handshake)) => {
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                self.socket = ClientSocket::SslHandshake(Some(new_handshake));
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                Ok(NetworkClientState::Idle)
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            }
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            Err(HandshakeError::Failure(new_handshake)) => {
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                self.socket = ClientSocket::SslHandshake(Some(new_handshake));
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                debug!("TLS handshake with {} ({}) failed", self.id, self.peer_addr);
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                Err(Error::new(ErrorKind::Other, "Connection failure"))
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            }
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            Err(HandshakeError::SetupFailure(_)) => unreachable!(),
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        }
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    }
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    fn read_impl<R: Read>(
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        decoder: &mut ProtocolDecoder,
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        source: &mut R,
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        id: ClientId,
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        addr: &SocketAddr,
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    ) -> NetworkResult<Vec<HWProtocolMessage>> {
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        let mut bytes_read = 0;
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        let result = loop {
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            match decoder.read_from(source) {
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                Ok(bytes) => {
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                    debug!("Client {}: read {} bytes", id, bytes);
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                    bytes_read += bytes;
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                    if bytes == 0 {
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                        let result = if bytes_read == 0 {
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                            info!("EOF for client {} ({})", id, addr);
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                            (Vec::new(), NetworkClientState::Closed)
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                        } else {
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                            (decoder.extract_messages(), NetworkClientState::NeedsRead)
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                        };
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                        break Ok(result);
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                    } else if bytes_read >= MAX_BYTES_PER_READ {
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                        break Ok((decoder.extract_messages(), NetworkClientState::NeedsRead));
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                    }
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                }
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                Err(ref error) if error.kind() == ErrorKind::WouldBlock => {
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                    let messages = if bytes_read == 0 {
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                        Vec::new()
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                    } else {
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                        decoder.extract_messages()
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                    };
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                    break Ok((messages, NetworkClientState::Idle));
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                }
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                Err(error) => break Err(error),
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            }
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        };
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        result
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    }
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    pub fn read(&mut self) -> NetworkResult<Vec<HWProtocolMessage>> {
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        #[cfg(not(feature = "tls-connections"))]
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        match self.socket {
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            ClientSocket::Plain(ref mut stream) => {
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                NetworkClient::read_impl(&mut self.decoder, stream, self.id, &self.peer_addr)
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            }
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        }
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        #[cfg(feature = "tls-connections")]
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        match self.socket {
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            ClientSocket::SslHandshake(ref mut handshake_opt) => {
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                let handshake = std::mem::replace(handshake_opt, None).unwrap();
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                Ok((Vec::new(), self.handshake_impl(handshake)?))
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            }
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            ClientSocket::SslStream(ref mut stream) => {
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                NetworkClient::read_impl(&mut self.decoder, stream, self.id, &self.peer_addr)
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            }
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        }
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    }
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    fn write_impl<W: Write>(buf_out: &mut netbuf::Buf, destination: &mut W) -> NetworkResult<()> {
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        let result = loop {
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            match buf_out.write_to(destination) {
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                Ok(bytes) if buf_out.is_empty() || bytes == 0 => {
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                    break Ok(((), NetworkClientState::Idle));
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                }
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                Ok(_) => (),
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                Err(ref error)
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                    if error.kind() == ErrorKind::Interrupted
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                        || error.kind() == ErrorKind::WouldBlock =>
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                {
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                    break Ok(((), NetworkClientState::NeedsWrite));
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                }
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                Err(error) => break Err(error),
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            }
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        };
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        result
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    }
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    pub fn write(&mut self) -> NetworkResult<()> {
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        let result = {
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            #[cfg(not(feature = "tls-connections"))]
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            match self.socket {
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                ClientSocket::Plain(ref mut stream) => {
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                    NetworkClient::write_impl(&mut self.buf_out, stream)
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                }
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            }
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            #[cfg(feature = "tls-connections")]
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            {
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                match self.socket {
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                    ClientSocket::SslHandshake(ref mut handshake_opt) => {
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                        let handshake = std::mem::replace(handshake_opt, None).unwrap();
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                        Ok(((), self.handshake_impl(handshake)?))
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                    }
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                    ClientSocket::SslStream(ref mut stream) => {
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                        NetworkClient::write_impl(&mut self.buf_out, stream)
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                    }
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                }
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            }
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        };
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        self.socket.inner().flush()?;
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        result
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    }
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    pub fn send_raw_msg(&mut self, msg: &[u8]) {
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        self.buf_out.write_all(msg).unwrap();
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    }
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    pub fn send_string(&mut self, msg: &str) {
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        self.send_raw_msg(&msg.as_bytes());
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    }
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    pub fn replace_timeout(&mut self, timeout: timer::Timeout) -> timer::Timeout {
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        replace(&mut self.timeout, timeout)
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    }
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}
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#[cfg(feature = "tls-connections")]
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struct ServerSsl {
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    context: SslContext,
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}
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#[cfg(feature = "official-server")]
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pub struct IoLayer {
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    next_request_id: RequestId,
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    request_queue: Vec<(RequestId, ClientId)>,
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    io_thread: IOThread,
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}
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#[cfg(feature = "official-server")]
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impl IoLayer {
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    fn new() -> Self {
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        Self {
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            next_request_id: 0,
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            request_queue: vec![],
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            io_thread: IOThread::new(),
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        }
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    }
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    fn send(&mut self, client_id: ClientId, task: IoTask) {
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        let request_id = self.next_request_id;
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        self.next_request_id += 1;
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        self.request_queue.push((request_id, client_id));
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        self.io_thread.send(request_id, task);
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    }
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    fn try_recv(&mut self) -> Option<(ClientId, IoResult)> {
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        let (request_id, result) = self.io_thread.try_recv()?;
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        if let Some(index) = self
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            .request_queue
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            .iter()
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            .position(|(id, _)| *id == request_id)
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        {
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            let (_, client_id) = self.request_queue.swap_remove(index);
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            Some((client_id, result))
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        } else {
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            None
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        }
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    }
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    fn cancel(&mut self, client_id: ClientId) {
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        let mut index = 0;
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        while index < self.request_queue.len() {
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            if self.request_queue[index].1 == client_id {
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                self.request_queue.swap_remove(index);
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            } else {
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                index += 1;
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            }
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        }
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    }
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}
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enum TimeoutEvent {
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    SendPing,
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    DropClient,
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}
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struct TimerData(TimeoutEvent, ClientId);
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pub struct NetworkLayer {
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    listener: TcpListener,
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    server: HWServer,
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    clients: Slab<NetworkClient>,
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    pending: HashSet<(ClientId, NetworkClientState)>,
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    pending_cache: Vec<(ClientId, NetworkClientState)>,
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    #[cfg(feature = "tls-connections")]
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    ssl: ServerSsl,
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    #[cfg(feature = "official-server")]
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    io: IoLayer,
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    timer: timer::Timer<TimerData>,
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}
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fn create_ping_timeout(timer: &mut timer::Timer<TimerData>, client_id: ClientId) -> timer::Timeout {
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    timer.set_timeout(
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        SEND_PING_TIMEOUT,
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        TimerData(TimeoutEvent::SendPing, client_id),
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    )
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}
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fn create_drop_timeout(timer: &mut timer::Timer<TimerData>, client_id: ClientId) -> timer::Timeout {
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    timer.set_timeout(
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        DROP_CLIENT_TIMEOUT,
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        TimerData(TimeoutEvent::DropClient, client_id),
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    )
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}
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impl NetworkLayer {
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    pub fn new(listener: TcpListener, clients_limit: usize, rooms_limit: usize) -> NetworkLayer {
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        let server = HWServer::new(clients_limit, rooms_limit);
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        let clients = Slab::with_capacity(clients_limit);
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        let pending = HashSet::with_capacity(2 * clients_limit);
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        let pending_cache = Vec::with_capacity(2 * clients_limit);
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        let timer = timer::Builder::default().build();
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        NetworkLayer {
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   349
            listener,
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   350
            server,
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   351
            clients,
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   352
            pending,
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   353
            pending_cache,
13804
c8fd12db6215 Add TLS support
alfadur
parents: 13671
diff changeset
   354
            #[cfg(feature = "tls-connections")]
14462
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   355
            ssl: NetworkLayer::create_ssl_context(),
14784
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   356
            #[cfg(feature = "official-server")]
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   357
            io: IoLayer::new(),
14808
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   358
            timer,
13804
c8fd12db6215 Add TLS support
alfadur
parents: 13671
diff changeset
   359
        }
c8fd12db6215 Add TLS support
alfadur
parents: 13671
diff changeset
   360
    }
c8fd12db6215 Add TLS support
alfadur
parents: 13671
diff changeset
   361
c8fd12db6215 Add TLS support
alfadur
parents: 13671
diff changeset
   362
    #[cfg(feature = "tls-connections")]
c8fd12db6215 Add TLS support
alfadur
parents: 13671
diff changeset
   363
    fn create_ssl_context() -> ServerSsl {
c8fd12db6215 Add TLS support
alfadur
parents: 13671
diff changeset
   364
        let mut builder = SslContextBuilder::new(SslMethod::tls()).unwrap();
c8fd12db6215 Add TLS support
alfadur
parents: 13671
diff changeset
   365
        builder.set_verify(SslVerifyMode::NONE);
c8fd12db6215 Add TLS support
alfadur
parents: 13671
diff changeset
   366
        builder.set_read_ahead(true);
14462
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   367
        builder
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   368
            .set_certificate_file("ssl/cert.pem", SslFiletype::PEM)
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   369
            .unwrap();
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   370
        builder
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   371
            .set_private_key_file("ssl/key.pem", SslFiletype::PEM)
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   372
            .unwrap();
13804
c8fd12db6215 Add TLS support
alfadur
parents: 13671
diff changeset
   373
        builder.set_options(SslOptions::NO_COMPRESSION);
c8fd12db6215 Add TLS support
alfadur
parents: 13671
diff changeset
   374
        builder.set_cipher_list("DEFAULT:!LOW:!RC4:!EXP").unwrap();
14462
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   375
        ServerSsl {
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   376
            context: builder.build(),
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   377
        }
13124
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   378
    }
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   379
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   380
    pub fn register_server(&self, poll: &Poll) -> io::Result<()> {
14462
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   381
        poll.register(
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   382
            &self.listener,
14784
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   383
            utils::SERVER_TOKEN,
14462
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   384
            Ready::readable(),
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   385
            PollOpt::edge(),
14784
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   386
        )?;
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   387
14808
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   388
        poll.register(
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   389
            &self.timer,
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   390
            utils::TIMER_TOKEN,
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   391
            Ready::readable(),
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   392
            PollOpt::edge(),
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   393
        )?;
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   394
14784
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   395
        #[cfg(feature = "official-server")]
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   396
        self.io.io_thread.register_rx(poll, utils::IO_TOKEN)?;
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   397
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   398
        Ok(())
13124
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   399
    }
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   400
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   401
    fn deregister_client(&mut self, poll: &Poll, id: ClientId) {
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   402
        let mut client_exists = false;
13419
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   403
        if let Some(ref client) = self.clients.get(id) {
13804
c8fd12db6215 Add TLS support
alfadur
parents: 13671
diff changeset
   404
            poll.deregister(client.socket.inner())
13529
5359ff75da3a indulge clippy
alfadur
parents: 13483
diff changeset
   405
                .expect("could not deregister socket");
13124
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   406
            info!("client {} ({}) removed", client.id, client.peer_addr);
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   407
            client_exists = true;
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   408
        }
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   409
        if client_exists {
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   410
            self.clients.remove(id);
14784
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   411
            #[cfg(feature = "official-server")]
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   412
            self.io.cancel(id);
13124
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   413
        }
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   414
    }
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   415
14462
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   416
    fn register_client(
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   417
        &mut self,
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   418
        poll: &Poll,
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   419
        client_socket: ClientSocket,
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   420
        addr: SocketAddr,
14698
6a2e13e36b7f add server anteroom
alfadur <mail@none>
parents: 14678
diff changeset
   421
    ) -> ClientId {
6a2e13e36b7f add server anteroom
alfadur <mail@none>
parents: 14678
diff changeset
   422
        let entry = self.clients.vacant_entry();
6a2e13e36b7f add server anteroom
alfadur <mail@none>
parents: 14678
diff changeset
   423
        let client_id = entry.key();
6a2e13e36b7f add server anteroom
alfadur <mail@none>
parents: 14678
diff changeset
   424
14462
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   425
        poll.register(
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   426
            client_socket.inner(),
14698
6a2e13e36b7f add server anteroom
alfadur <mail@none>
parents: 14678
diff changeset
   427
            Token(client_id),
14462
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   428
            Ready::readable() | Ready::writable(),
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   429
            PollOpt::edge(),
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   430
        )
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   431
        .expect("could not register socket with event loop");
13124
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   432
14808
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   433
        let client = NetworkClient::new(
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   434
            client_id,
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   435
            client_socket,
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   436
            addr,
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   437
            create_ping_timeout(&mut self.timer, client_id),
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   438
        );
13124
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   439
        info!("client {} ({}) added", client.id, client.peer_addr);
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   440
        entry.insert(client);
14698
6a2e13e36b7f add server anteroom
alfadur <mail@none>
parents: 14678
diff changeset
   441
6a2e13e36b7f add server anteroom
alfadur <mail@none>
parents: 14678
diff changeset
   442
        client_id
13124
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   443
    }
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   444
14784
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   445
    fn handle_response(&mut self, mut response: handlers::Response, poll: &Poll) {
14677
6e6632068a33 Server action refactoring part 3 of N
alfadur <mail@none>
parents: 14676
diff changeset
   446
        debug!("{} pending server messages", response.len());
6e6632068a33 Server action refactoring part 3 of N
alfadur <mail@none>
parents: 14676
diff changeset
   447
        let output = response.extract_messages(&mut self.server);
6e6632068a33 Server action refactoring part 3 of N
alfadur <mail@none>
parents: 14676
diff changeset
   448
        for (clients, message) in output {
13424
81e0ed105f5d implementation of team related messages
alfadur
parents: 13421
diff changeset
   449
            debug!("Message {:?} to {:?}", message, clients);
81e0ed105f5d implementation of team related messages
alfadur
parents: 13421
diff changeset
   450
            let msg_string = message.to_raw_protocol();
81e0ed105f5d implementation of team related messages
alfadur
parents: 13421
diff changeset
   451
            for client_id in clients {
81e0ed105f5d implementation of team related messages
alfadur
parents: 13421
diff changeset
   452
                if let Some(client) = self.clients.get_mut(client_id) {
81e0ed105f5d implementation of team related messages
alfadur
parents: 13421
diff changeset
   453
                    client.send_string(&msg_string);
14462
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   454
                    self.pending
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   455
                        .insert((client_id, NetworkClientState::NeedsWrite));
13419
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   456
                }
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   457
            }
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   458
        }
14701
8a45c90f4580 fix client removal
alfadur
parents: 14698
diff changeset
   459
8a45c90f4580 fix client removal
alfadur
parents: 14698
diff changeset
   460
        for client_id in response.extract_removed_clients() {
8a45c90f4580 fix client removal
alfadur
parents: 14698
diff changeset
   461
            self.deregister_client(poll, client_id);
8a45c90f4580 fix client removal
alfadur
parents: 14698
diff changeset
   462
        }
14784
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   463
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   464
        #[cfg(feature = "official-server")]
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   465
        {
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   466
            let client_id = response.client_id();
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   467
            for task in response.extract_io_tasks() {
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   468
                self.io.send(client_id, task);
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   469
            }
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   470
        }
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   471
    }
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   472
14808
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   473
    pub fn handle_timeout(&mut self, poll: &Poll) -> io::Result<()> {
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   474
        while let Some(TimerData(event, client_id)) = self.timer.poll() {
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   475
            match event {
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   476
                TimeoutEvent::SendPing => {
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   477
                    if let Some(ref mut client) = self.clients.get_mut(client_id) {
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   478
                        client.send_string(&HWServerMessage::Ping.to_raw_protocol());
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   479
                        client.write()?;
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   480
                        client.replace_timeout(create_drop_timeout(&mut self.timer, client_id));
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   481
                    }
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   482
                }
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   483
                TimeoutEvent::DropClient => {
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   484
                    self.operation_failed(
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   485
                        poll,
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   486
                        client_id,
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   487
                        &ErrorKind::TimedOut.into(),
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   488
                        "No ping response",
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   489
                    )?;
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   490
                }
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   491
            }
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   492
        }
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   493
        Ok(())
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   494
    }
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   495
14784
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   496
    #[cfg(feature = "official-server")]
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   497
    pub fn handle_io_result(&mut self) {
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   498
        if let Some((client_id, result)) = self.io.try_recv() {
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   499
            let mut response = handlers::Response::new(client_id);
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   500
            handlers::handle_io_result(&mut self.server, client_id, &mut response, result);
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   501
        }
13419
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   502
    }
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   503
13804
c8fd12db6215 Add TLS support
alfadur
parents: 13671
diff changeset
   504
    fn create_client_socket(&self, socket: TcpStream) -> io::Result<ClientSocket> {
14462
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   505
        #[cfg(not(feature = "tls-connections"))]
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   506
        {
13804
c8fd12db6215 Add TLS support
alfadur
parents: 13671
diff changeset
   507
            Ok(ClientSocket::Plain(socket))
c8fd12db6215 Add TLS support
alfadur
parents: 13671
diff changeset
   508
        }
c8fd12db6215 Add TLS support
alfadur
parents: 13671
diff changeset
   509
14462
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   510
        #[cfg(feature = "tls-connections")]
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   511
        {
13804
c8fd12db6215 Add TLS support
alfadur
parents: 13671
diff changeset
   512
            let ssl = Ssl::new(&self.ssl.context).unwrap();
c8fd12db6215 Add TLS support
alfadur
parents: 13671
diff changeset
   513
            let mut builder = SslStreamBuilder::new(ssl, socket);
c8fd12db6215 Add TLS support
alfadur
parents: 13671
diff changeset
   514
            builder.set_accept_state();
c8fd12db6215 Add TLS support
alfadur
parents: 13671
diff changeset
   515
            match builder.handshake() {
14462
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   516
                Ok(stream) => Ok(ClientSocket::SslStream(stream)),
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   517
                Err(HandshakeError::WouldBlock(stream)) => {
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   518
                    Ok(ClientSocket::SslHandshake(Some(stream)))
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   519
                }
13804
c8fd12db6215 Add TLS support
alfadur
parents: 13671
diff changeset
   520
                Err(e) => {
c8fd12db6215 Add TLS support
alfadur
parents: 13671
diff changeset
   521
                    debug!("OpenSSL handshake failed: {}", e);
c8fd12db6215 Add TLS support
alfadur
parents: 13671
diff changeset
   522
                    Err(Error::new(ErrorKind::Other, "Connection failure"))
c8fd12db6215 Add TLS support
alfadur
parents: 13671
diff changeset
   523
                }
c8fd12db6215 Add TLS support
alfadur
parents: 13671
diff changeset
   524
            }
c8fd12db6215 Add TLS support
alfadur
parents: 13671
diff changeset
   525
        }
c8fd12db6215 Add TLS support
alfadur
parents: 13671
diff changeset
   526
    }
c8fd12db6215 Add TLS support
alfadur
parents: 13671
diff changeset
   527
13124
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   528
    pub fn accept_client(&mut self, poll: &Poll) -> io::Result<()> {
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   529
        let (client_socket, addr) = self.listener.accept()?;
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   530
        info!("Connected: {}", addr);
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   531
14698
6a2e13e36b7f add server anteroom
alfadur <mail@none>
parents: 14678
diff changeset
   532
        let client_id = self.register_client(poll, self.create_client_socket(client_socket)?, addr);
6a2e13e36b7f add server anteroom
alfadur <mail@none>
parents: 14678
diff changeset
   533
6a2e13e36b7f add server anteroom
alfadur <mail@none>
parents: 14678
diff changeset
   534
        let mut response = handlers::Response::new(client_id);
6a2e13e36b7f add server anteroom
alfadur <mail@none>
parents: 14678
diff changeset
   535
6a2e13e36b7f add server anteroom
alfadur <mail@none>
parents: 14678
diff changeset
   536
        handlers::handle_client_accept(&mut self.server, client_id, &mut response);
6a2e13e36b7f add server anteroom
alfadur <mail@none>
parents: 14678
diff changeset
   537
6a2e13e36b7f add server anteroom
alfadur <mail@none>
parents: 14678
diff changeset
   538
        if !response.is_empty() {
14784
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   539
            self.handle_response(response, poll);
14698
6a2e13e36b7f add server anteroom
alfadur <mail@none>
parents: 14678
diff changeset
   540
        }
13124
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   541
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   542
        Ok(())
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   543
    }
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   544
14462
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   545
    fn operation_failed(
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   546
        &mut self,
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   547
        poll: &Poll,
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   548
        client_id: ClientId,
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   549
        error: &Error,
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   550
        msg: &str,
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   551
    ) -> io::Result<()> {
13419
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   552
        let addr = if let Some(ref mut client) = self.clients.get_mut(client_id) {
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   553
            client.peer_addr
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   554
        } else {
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   555
            SocketAddr::new(IpAddr::V4(Ipv4Addr::new(0, 0, 0, 0)), 0)
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   556
        };
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   557
        debug!("{}({}): {}", msg, addr, error);
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   558
        self.client_error(poll, client_id)
13124
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   559
    }
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   560
14462
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   561
    pub fn client_readable(&mut self, poll: &Poll, client_id: ClientId) -> io::Result<()> {
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   562
        let messages = if let Some(ref mut client) = self.clients.get_mut(client_id) {
14808
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   563
            let timeout = client.replace_timeout(create_ping_timeout(&mut self.timer, client_id));
92225a708bda add client timeouts
alfadur
parents: 14801
diff changeset
   564
            self.timer.cancel_timeout(&timeout);
14462
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   565
            client.read()
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   566
        } else {
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   567
            warn!("invalid readable client: {}", client_id);
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   568
            Ok((Vec::new(), NetworkClientState::Idle))
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   569
        };
13419
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   570
14676
455865ccd36c Server action refactoring part 2 of N
alfadur <mail@none>
parents: 14462
diff changeset
   571
        let mut response = handlers::Response::new(client_id);
455865ccd36c Server action refactoring part 2 of N
alfadur <mail@none>
parents: 14462
diff changeset
   572
13419
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   573
        match messages {
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   574
            Ok((messages, state)) => {
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   575
                for message in messages {
14676
455865ccd36c Server action refactoring part 2 of N
alfadur <mail@none>
parents: 14462
diff changeset
   576
                    debug!("Handling message {:?} for client {}", message, client_id);
14801
f5d43f007970 start by actually handling client messages
alfadur
parents: 14800
diff changeset
   577
                    handlers::handle(&mut self.server, client_id, &mut response, message);
13419
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   578
                }
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   579
                match state {
13420
0eedc17055a0 rework of prior
alfadur
parents: 13419
diff changeset
   580
                    NetworkClientState::NeedsRead => {
0eedc17055a0 rework of prior
alfadur
parents: 13419
diff changeset
   581
                        self.pending.insert((client_id, state));
14462
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   582
                    }
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   583
                    NetworkClientState::Closed => self.client_error(&poll, client_id)?,
13419
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   584
                    _ => {}
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   585
                };
13124
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   586
            }
13419
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   587
            Err(e) => self.operation_failed(
14462
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   588
                poll,
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   589
                client_id,
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   590
                &e,
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   591
                "Error while reading from client socket",
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   592
            )?,
13124
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   593
        }
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   594
14677
6e6632068a33 Server action refactoring part 3 of N
alfadur <mail@none>
parents: 14676
diff changeset
   595
        if !response.is_empty() {
14784
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   596
            self.handle_response(response, poll);
13124
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   597
        }
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   598
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   599
        Ok(())
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   600
    }
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   601
14462
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   602
    pub fn client_writable(&mut self, poll: &Poll, client_id: ClientId) -> io::Result<()> {
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   603
        let result = if let Some(ref mut client) = self.clients.get_mut(client_id) {
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   604
            client.write()
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   605
        } else {
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   606
            warn!("invalid writable client: {}", client_id);
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   607
            Ok(((), NetworkClientState::Idle))
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   608
        };
13419
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   609
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   610
        match result {
13420
0eedc17055a0 rework of prior
alfadur
parents: 13419
diff changeset
   611
            Ok(((), state)) if state == NetworkClientState::NeedsWrite => {
0eedc17055a0 rework of prior
alfadur
parents: 13419
diff changeset
   612
                self.pending.insert((client_id, state));
14462
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   613
            }
13420
0eedc17055a0 rework of prior
alfadur
parents: 13419
diff changeset
   614
            Ok(_) => {}
14462
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   615
            Err(e) => {
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   616
                self.operation_failed(poll, client_id, &e, "Error while writing to client socket")?
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   617
            }
13124
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   618
        }
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   619
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   620
        Ok(())
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   621
    }
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   622
14462
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   623
    pub fn client_error(&mut self, poll: &Poll, client_id: ClientId) -> io::Result<()> {
13124
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   624
        self.deregister_client(poll, client_id);
14678
08a8605bafaf Server action refactoring part 4 of N
alfadur <mail@none>
parents: 14677
diff changeset
   625
        let mut response = handlers::Response::new(client_id);
08a8605bafaf Server action refactoring part 4 of N
alfadur <mail@none>
parents: 14677
diff changeset
   626
        handlers::handle_client_loss(&mut self.server, client_id, &mut response);
14784
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14702
diff changeset
   627
        self.handle_response(response, poll);
13124
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   628
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   629
        Ok(())
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   630
    }
13419
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   631
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   632
    pub fn has_pending_operations(&self) -> bool {
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   633
        !self.pending.is_empty()
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   634
    }
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   635
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   636
    pub fn on_idle(&mut self, poll: &Poll) -> io::Result<()> {
13420
0eedc17055a0 rework of prior
alfadur
parents: 13419
diff changeset
   637
        if self.has_pending_operations() {
13483
d79795acaa73 Mostly implement voting
alfadur
parents: 13424
diff changeset
   638
            let mut cache = replace(&mut self.pending_cache, Vec::new());
13420
0eedc17055a0 rework of prior
alfadur
parents: 13419
diff changeset
   639
            cache.extend(self.pending.drain());
0eedc17055a0 rework of prior
alfadur
parents: 13419
diff changeset
   640
            for (id, state) in cache.drain(..) {
0eedc17055a0 rework of prior
alfadur
parents: 13419
diff changeset
   641
                match state {
14462
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   642
                    NetworkClientState::NeedsRead => self.client_readable(poll, id)?,
98ef2913ec73 Apply rustfmt to all files
unc0rr
parents: 14420
diff changeset
   643
                    NetworkClientState::NeedsWrite => self.client_writable(poll, id)?,
13420
0eedc17055a0 rework of prior
alfadur
parents: 13419
diff changeset
   644
                    _ => {}
0eedc17055a0 rework of prior
alfadur
parents: 13419
diff changeset
   645
                }
13419
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   646
            }
13420
0eedc17055a0 rework of prior
alfadur
parents: 13419
diff changeset
   647
            swap(&mut cache, &mut self.pending_cache);
13419
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   648
        }
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   649
        Ok(())
28b314ad566d handle edge polling properly
alfadur
parents: 13124
diff changeset
   650
    }
13124
1e39b8749072 separated the server logic from all the async io mess.
alfadur
parents:
diff changeset
   651
}