rust/hedgewars-server/src/handlers.rs
author alfadur
Mon, 03 Jun 2019 01:15:57 +0300
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parent 15107 80ff12edf5e6
child 15118 7d6e519a88c5
permissions -rw-r--r--
check for account existence before asking passwords
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use mio;
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use std::{collections::HashMap, io, io::Write};
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use self::{
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    actions::{Destination, DestinationGroup, PendingMessage},
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    inanteroom::LoginResult,
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};
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use crate::{
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    core::{
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        room::RoomSave,
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        server::HwServer,
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        types::{ClientId, GameCfg, Replay, RoomId, TeamInfo},
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    },
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    protocol::messages::{
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        global_chat, server_chat, HwProtocolMessage, HwProtocolMessage::EngineMessage,
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        HwServerMessage, HwServerMessage::*,
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    },
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    utils,
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};
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use base64::encode;
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use log::*;
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use rand::{thread_rng, RngCore};
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mod actions;
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mod checker;
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mod common;
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mod inanteroom;
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mod inlobby;
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mod inroom;
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use std::fmt::{Formatter, LowerHex};
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#[derive(PartialEq, Debug)]
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pub struct Sha1Digest([u8; 20]);
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impl Sha1Digest {
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    pub fn new(digest: [u8; 20]) -> Self {
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        Self(digest)
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    }
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}
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impl LowerHex for Sha1Digest {
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    fn fmt(&self, f: &mut Formatter) -> Result<(), std::fmt::Error> {
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        for byte in &self.0 {
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            write!(f, "{:02x}", byte)?;
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        }
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        Ok(())
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    }
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}
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#[derive(Debug)]
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pub struct AccountInfo {
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    pub is_registered: bool,
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    pub is_admin: bool,
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    pub is_contributor: bool,
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    pub server_hash: Sha1Digest,
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}
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pub enum IoTask {
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    CheckRegistered {
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        nick: String,
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    },
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    GetAccount {
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        nick: String,
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        protocol: u16,
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        password_hash: String,
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        client_salt: String,
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        server_salt: String,
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    },
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    GetReplay {
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        id: u32,
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    },
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    SaveRoom {
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        room_id: RoomId,
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        filename: String,
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        contents: String,
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    },
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    LoadRoom {
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        room_id: RoomId,
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        filename: String,
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    },
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}
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#[derive(Debug)]
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pub enum IoResult {
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    AccountRegistered(bool),
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    Account(Option<AccountInfo>),
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    Replay(Option<Replay>),
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    SaveRoom(RoomId, bool),
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    LoadRoom(RoomId, Option<String>),
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}
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pub struct Response {
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    client_id: ClientId,
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    messages: Vec<PendingMessage>,
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    io_tasks: Vec<IoTask>,
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    removed_clients: Vec<ClientId>,
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}
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impl Response {
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    pub fn new(client_id: ClientId) -> Self {
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        Self {
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            client_id,
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            messages: vec![],
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            io_tasks: vec![],
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            removed_clients: vec![],
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        }
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    }
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    #[inline]
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    pub fn is_empty(&self) -> bool {
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        self.messages.is_empty() && self.removed_clients.is_empty() && self.io_tasks.is_empty()
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    }
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    #[inline]
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    pub fn len(&self) -> usize {
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        self.messages.len()
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    }
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    #[inline]
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    pub fn client_id(&self) -> ClientId {
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        self.client_id
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    }
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    #[inline]
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    pub fn add(&mut self, message: PendingMessage) {
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        self.messages.push(message)
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    }
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    #[inline]
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    pub fn request_io(&mut self, task: IoTask) {
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        self.io_tasks.push(task)
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    }
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    pub fn extract_messages<'a, 'b: 'a>(
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        &'b mut self,
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        server: &'a HwServer,
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    ) -> impl Iterator<Item = (Vec<ClientId>, HwServerMessage)> + 'a {
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        let client_id = self.client_id;
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        self.messages.drain(..).map(move |m| {
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            let ids = get_recipients(server, client_id, m.destination);
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            (ids, m.message)
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        })
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    }
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    pub fn remove_client(&mut self, client_id: ClientId) {
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        self.removed_clients.push(client_id);
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    }
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    pub fn extract_removed_clients(&mut self) -> impl Iterator<Item = ClientId> + '_ {
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        self.removed_clients.drain(..)
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    }
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    pub fn extract_io_tasks(&mut self) -> impl Iterator<Item = IoTask> + '_ {
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        self.io_tasks.drain(..)
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    }
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}
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impl Extend<PendingMessage> for Response {
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    fn extend<T: IntoIterator<Item = PendingMessage>>(&mut self, iter: T) {
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        for msg in iter {
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            self.add(msg)
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        }
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    }
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}
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fn get_recipients(
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    server: &HwServer,
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    client_id: ClientId,
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    destination: Destination,
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) -> Vec<ClientId> {
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    match destination {
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        Destination::ToSelf => vec![client_id],
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        Destination::ToId(id) => vec![id],
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        Destination::ToIds(ids) => ids,
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        Destination::ToAll { group, skip_self } => {
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            let mut ids: Vec<_> = match group {
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                DestinationGroup::All => server.all_clients().collect(),
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                DestinationGroup::Lobby => server.lobby_clients().collect(),
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                DestinationGroup::Protocol(proto) => server.protocol_clients(proto).collect(),
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                DestinationGroup::Room(id) => server.room_clients(id).collect(),
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            };
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            if skip_self {
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                if let Some(index) = ids.iter().position(|id| *id == client_id) {
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                    ids.remove(index);
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                }
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            }
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            ids
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        }
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    }
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}
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pub fn handle(
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    server: &mut HwServer,
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    client_id: ClientId,
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    response: &mut Response,
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    message: HwProtocolMessage,
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) {
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    match message {
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        HwProtocolMessage::Ping => response.add(Pong.send_self()),
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        _ => {
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            if server.anteroom.clients.contains(client_id) {
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                match inanteroom::handle(server, client_id, response, message) {
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                    LoginResult::Unchanged => (),
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                    LoginResult::Complete => {
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                        if let Some(client) = server.anteroom.remove_client(client_id) {
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                            server.add_client(client_id, client);
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                            common::join_lobby(server, response);
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                        }
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                    }
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                    LoginResult::Exit => {
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                        server.anteroom.remove_client(client_id);
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                        response.remove_client(client_id);
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                    }
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                }
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            } else if server.clients.contains(client_id) {
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                match message {
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                    HwProtocolMessage::Quit(Some(msg)) => {
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                        common::remove_client(server, response, "User quit: ".to_string() + &msg);
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                    }
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                    HwProtocolMessage::Quit(None) => {
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                        common::remove_client(server, response, "User quit".to_string());
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                    }
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                    HwProtocolMessage::Info(nick) => {
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                        if let Some(client) = server.find_client(&nick) {
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                            let admin_sign = if client.is_admin() { "@" } else { "" };
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                            let master_sign = if client.is_master() { "+" } else { "" };
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                            let room_info = match client.room_id {
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                                Some(room_id) => {
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                                    let room = &server.rooms[room_id];
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                                    let status = match room.game_info {
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                                        Some(_) if client.teams_in_game == 0 => "(spectating)",
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                                        Some(_) => "(playing)",
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                                        None => "",
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                                    };
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                                    format!(
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                                        "[{}{}room {}]{}",
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                                        admin_sign, master_sign, room.name, status
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                                    )
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                                }
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                                None => format!("[{}lobby]", admin_sign),
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                            };
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                            let info = vec![
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                                client.nick.clone(),
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                                "[]".to_string(),
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                                utils::protocol_version_string(client.protocol_number).to_string(),
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                                room_info,
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                            ];
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                            response.add(Info(info).send_self())
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                        } else {
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                            response
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                                .add(server_chat("Player is not online.".to_string()).send_self())
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                        }
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                    }
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                    HwProtocolMessage::ToggleServerRegisteredOnly => {
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                        if !server.clients[client_id].is_admin() {
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                            response.add(Warning("Access denied.".to_string()).send_self());
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                        } else {
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                            server.set_is_registered_only(server.is_registered_only());
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                            let msg = if server.is_registered_only() {
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                                "This server no longer allows unregistered players to join."
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                            } else {
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                                "This server now allows unregistered players to join."
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                            };
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                            response.add(server_chat(msg.to_string()).send_all());
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                        }
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                    }
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                    HwProtocolMessage::Global(msg) => {
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                        if !server.clients[client_id].is_admin() {
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                            response.add(Warning("Access denied.".to_string()).send_self());
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                        } else {
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                            response.add(global_chat(msg).send_all())
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                        }
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                    }
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                    HwProtocolMessage::SuperPower => {
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                        if !server.clients[client_id].is_admin() {
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                            response.add(Warning("Access denied.".to_string()).send_self());
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                        } else {
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                            server.clients[client_id].set_has_super_power(true);
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                            response
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                                .add(server_chat("Super power activated.".to_string()).send_self())
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                        }
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                    }
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                    HwProtocolMessage::Watch(id) => {
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                        #[cfg(feature = "official-server")]
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                        {
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                            response.request_io(IoTask::GetReplay { id })
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                        }
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                        #[cfg(not(feature = "official-server"))]
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                        {
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                            response.add(
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                                Warning("This server does not support replays!".to_string())
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                                    .send_self(),
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                            );
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                        }
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                    }
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                    _ => match server.clients[client_id].room_id {
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                        None => inlobby::handle(server, client_id, response, message),
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                        Some(room_id) => {
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                            inroom::handle(server, client_id, response, room_id, message)
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                        }
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                    },
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                }
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            }
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        }
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    }
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}
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pub fn handle_client_accept(server: &mut HwServer, client_id: ClientId, response: &mut Response) {
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    let mut salt = [0u8; 18];
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    thread_rng().fill_bytes(&mut salt);
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    server.anteroom.add_client(client_id, encode(&salt));
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    response.add(HwServerMessage::Connected(utils::SERVER_VERSION).send_self());
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}
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pub fn handle_client_loss(server: &mut HwServer, client_id: ClientId, response: &mut Response) {
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    if server.anteroom.remove_client(client_id).is_none() {
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        common::remove_client(server, response, "Connection reset".to_string());
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    }
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}
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pub fn handle_io_result(
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    server: &mut HwServer,
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    client_id: ClientId,
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    response: &mut Response,
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    io_result: IoResult,
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) {
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    match io_result {
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        IoResult::AccountRegistered(is_registered) => {
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            if !is_registered && server.is_registered_only() {
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                response.add(
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                    Bye("This server only allows registered users to join.".to_string())
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                        .send_self(),
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                );
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                response.remove_client(client_id);
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            } else if is_registered {
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                let salt = server.anteroom.clients[client_id].server_salt.clone();
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                response.add(AskPassword(salt).send_self());
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            } else if let Some(client) = server.anteroom.remove_client(client_id) {
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                server.add_client(client_id, client);
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                common::join_lobby(server, response);
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            }
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        }
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        IoResult::Account(Some(info)) => {
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            response.add(ServerAuth(format!("{:x}", info.server_hash)).send_self());
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            if let Some(client) = server.anteroom.remove_client(client_id) {
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                server.add_client(client_id, client);
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                let client = &mut server.clients[client_id];
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                client.set_is_registered(info.is_registered);
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                client.set_is_admin(info.is_admin);
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                client.set_is_contributor(info.is_contributor);
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                common::join_lobby(server, response);
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            }
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        }
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        IoResult::Account(None) => {
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            response.add(Error("Authentication failed.".to_string()).send_self());
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            response.remove_client(client_id);
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        }
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        IoResult::Replay(Some(replay)) => {
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            let protocol = server.clients[client_id].protocol_number;
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            let start_msg = if protocol < 58 {
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                RoomJoined(vec![server.clients[client_id].nick.clone()])
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            } else {
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                ReplayStart
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            };
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            response.add(start_msg.send_self());
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            common::get_room_config_impl(&replay.config, client_id, response);
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            common::get_teams(replay.teams.iter(), client_id, response);
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            response.add(RunGame.send_self());
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            response.add(ForwardEngineMessage(replay.message_log).send_self());
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            if protocol < 58 {
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                response.add(Kicked.send_self());
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            }
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        }
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        IoResult::Replay(None) => {
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            response.add(Warning("Could't load the replay".to_string()).send_self())
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        }
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        IoResult::SaveRoom(_, true) => {
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            response.add(server_chat("Room configs saved successfully.".to_string()).send_self());
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        }
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        IoResult::SaveRoom(_, false) => {
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            response.add(Warning("Unable to save the room configs.".to_string()).send_self());
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        }
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        IoResult::LoadRoom(room_id, Some(contents)) => {
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            if let Some(ref mut room) = server.rooms.get_mut(room_id) {
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                match room.set_saves(&contents) {
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                    Ok(_) => response.add(
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                        server_chat("Room configs loaded successfully.".to_string()).send_self(),
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                    ),
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                    Err(e) => {
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                        warn!("Error while deserializing the room configs: {}", e);
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                        response.add(
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                            Warning("Unable to deserialize the room configs.".to_string())
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   402
                                .send_self(),
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                        );
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                    }
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                }
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            }
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        }
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        IoResult::LoadRoom(_, None) => {
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            response.add(Warning("Unable to load the room configs.".to_string()).send_self());
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        }
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    }
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}