rust/hedgewars-server/src/handlers.rs
author alfadur <mail@none>
Sat, 21 Dec 2019 00:26:17 +0300
changeset 15518 e705d30e0f10
parent 15517 abd5eb807166
child 15519 b3157d218ae2
permissions -rw-r--r--
some more room handler cleanup
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use std::{
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    cmp::PartialEq,
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    collections::HashMap,
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    fmt::{Formatter, LowerHex},
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    iter::Iterator,
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};
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use self::{
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    actions::{Destination, DestinationGroup, PendingMessage},
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    inanteroom::LoginResult,
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    strings::*,
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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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mod strings;
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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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impl PartialEq<&str> for Sha1Digest {
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    fn eq(&self, other: &&str) -> bool {
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        if other.len() != self.0.len() * 2 {
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            false
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        } else {
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            #[inline]
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            fn convert(c: u8) -> u8 {
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                if c > b'9' {
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                    c.wrapping_sub(b'a').saturating_add(10)
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                } else {
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                    c.wrapping_sub(b'0')
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                }
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            }
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            other
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                .as_bytes()
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                .chunks_exact(2)
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                .zip(&self.0)
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                .all(|(chars, byte)| {
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                    if let [hi, lo] = chars {
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                        convert(*lo) == byte & 0x0f && convert(*hi) == (byte & 0xf0) >> 4
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                    } else {
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                        unreachable!()
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                    }
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                })
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        }
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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 warn(&mut self, message: &str) {
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        self.add(Warning(message.to_string()).send_self());
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    }
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    #[inline]
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    pub fn error(&mut self, message: &str) {
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        self.add(Error(message.to_string()).send_self());
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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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        HwProtocolMessage::Pong => (),
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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::get_lobby_join_data(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.room(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.add(server_chat(USER_OFFLINE.to_string()).send_self())
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                        }
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                    }
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                    HwProtocolMessage::ToggleServerRegisteredOnly => {
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                        if !server.is_admin(client_id) {
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                            response.warn(ACCESS_DENIED);
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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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                                REGISTERED_ONLY_ENABLED
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                            } else {
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                                REGISTERED_ONLY_DISABLED
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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.is_admin(client_id) {
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                            response.warn(ACCESS_DENIED);
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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.enable_super_power(client_id) {
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                            response.add(server_chat(SUPER_POWER.to_string()).send_self())
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                        } else {
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                            response.warn(ACCESS_DENIED);
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                        }
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                    }
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                    HwProtocolMessage::Watch(id) => {
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   329
                        #[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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   333
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   334
                        #[cfg(not(feature = "official-server"))]
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                        {
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                            response.warn(REPLAY_NOT_SUPPORTED);
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                        }
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   338
                    }
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   339
                    _ => match server.client(client_id).room_id {
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   340
                        None => inlobby::handle(server, client_id, response, message),
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   341
                        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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   349
}
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pub fn handle_client_accept(
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   352
    server: &mut HwServer,
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   353
    client_id: ClientId,
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   354
    response: &mut Response,
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   355
    addr: [u8; 4],
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   356
    is_local: bool,
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   357
) {
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   358
    let ban_reason = Some(addr)
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   359
        .filter(|_| !is_local)
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   360
        .and_then(|a| server.anteroom.find_ip_ban(a));
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   361
    if let Some(reason) = ban_reason {
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   362
        response.add(HwServerMessage::Bye(reason).send_self());
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   363
        response.remove_client(client_id);
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   364
    } else {
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   365
        let mut salt = [0u8; 18];
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   366
        thread_rng().fill_bytes(&mut salt);
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   367
15517
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   368
        server
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   369
            .anteroom
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   370
            .add_client(client_id, encode(&salt), is_local);
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   371
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   372
        response.add(HwServerMessage::Connected(utils::SERVER_VERSION).send_self());
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   373
    }
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   374
}
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   375
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   376
pub fn handle_client_loss(server: &mut HwServer, client_id: ClientId, response: &mut Response) {
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8a45c90f4580 fix client removal
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   377
    if server.anteroom.remove_client(client_id).is_none() {
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   378
        common::remove_client(server, response, "Connection reset".to_string());
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   379
    }
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08a8605bafaf Server action refactoring part 4 of N
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}
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   381
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   382
pub fn handle_io_result(
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   383
    server: &mut HwServer,
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   384
    client_id: ClientId,
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   385
    response: &mut Response,
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   386
    io_result: IoResult,
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   387
) {
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   388
    match io_result {
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823052e66611 check for account existence before asking passwords
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   389
        IoResult::AccountRegistered(is_registered) => {
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   390
            if !is_registered && server.is_registered_only() {
15441
61a0bd0bb021 refactor root handler
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diff changeset
   391
                response.add(Bye(REGISTRATION_REQUIRED.to_string()).send_self());
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8ecdb5c6bb2a implement info, registered only & super power messages
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diff changeset
   392
                response.remove_client(client_id);
15103
823052e66611 check for account existence before asking passwords
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diff changeset
   393
            } else if is_registered {
823052e66611 check for account existence before asking passwords
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   394
                let salt = server.anteroom.clients[client_id].server_salt.clone();
823052e66611 check for account existence before asking passwords
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diff changeset
   395
                response.add(AskPassword(salt).send_self());
823052e66611 check for account existence before asking passwords
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diff changeset
   396
            } else if let Some(client) = server.anteroom.remove_client(client_id) {
823052e66611 check for account existence before asking passwords
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diff changeset
   397
                server.add_client(client_id, client);
15441
61a0bd0bb021 refactor root handler
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diff changeset
   398
                common::get_lobby_join_data(server, response);
15103
823052e66611 check for account existence before asking passwords
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parents: 15102
diff changeset
   399
            }
823052e66611 check for account existence before asking passwords
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diff changeset
   400
        }
823052e66611 check for account existence before asking passwords
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diff changeset
   401
        IoResult::Account(Some(info)) => {
823052e66611 check for account existence before asking passwords
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parents: 15102
diff changeset
   402
            response.add(ServerAuth(format!("{:x}", info.server_hash)).send_self());
15441
61a0bd0bb021 refactor root handler
alfadur
parents: 15439
diff changeset
   403
            if let Some(mut client) = server.anteroom.remove_client(client_id) {
61a0bd0bb021 refactor root handler
alfadur
parents: 15439
diff changeset
   404
                client.is_registered = info.is_registered;
61a0bd0bb021 refactor root handler
alfadur
parents: 15439
diff changeset
   405
                client.is_admin = info.is_admin;
61a0bd0bb021 refactor root handler
alfadur
parents: 15439
diff changeset
   406
                client.is_contributor = info.is_contributor;
15103
823052e66611 check for account existence before asking passwords
alfadur
parents: 15102
diff changeset
   407
                server.add_client(client_id, client);
15441
61a0bd0bb021 refactor root handler
alfadur
parents: 15439
diff changeset
   408
                common::get_lobby_join_data(server, response);
14779
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14696
diff changeset
   409
            }
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14696
diff changeset
   410
        }
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14696
diff changeset
   411
        IoResult::Account(None) => {
15441
61a0bd0bb021 refactor root handler
alfadur
parents: 15439
diff changeset
   412
            response.error(AUTHENTICATION_FAILED);
14779
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14696
diff changeset
   413
            response.remove_client(client_id);
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14696
diff changeset
   414
        }
14785
a1077e8d26f4 implement watch message apart from replay deserializing
alfadur
parents: 14784
diff changeset
   415
        IoResult::Replay(Some(replay)) => {
15441
61a0bd0bb021 refactor root handler
alfadur
parents: 15439
diff changeset
   416
            let client = server.client(client_id);
61a0bd0bb021 refactor root handler
alfadur
parents: 15439
diff changeset
   417
            let protocol = client.protocol_number;
14907
c156273b57de add REPLAY_START support
alfadur
parents: 14802
diff changeset
   418
            let start_msg = if protocol < 58 {
15441
61a0bd0bb021 refactor root handler
alfadur
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diff changeset
   419
                RoomJoined(vec![client.nick.clone()])
14907
c156273b57de add REPLAY_START support
alfadur
parents: 14802
diff changeset
   420
            } else {
c156273b57de add REPLAY_START support
alfadur
parents: 14802
diff changeset
   421
                ReplayStart
c156273b57de add REPLAY_START support
alfadur
parents: 14802
diff changeset
   422
            };
c156273b57de add REPLAY_START support
alfadur
parents: 14802
diff changeset
   423
            response.add(start_msg.send_self());
c156273b57de add REPLAY_START support
alfadur
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diff changeset
   424
14785
a1077e8d26f4 implement watch message apart from replay deserializing
alfadur
parents: 14784
diff changeset
   425
            common::get_room_config_impl(&replay.config, client_id, response);
a1077e8d26f4 implement watch message apart from replay deserializing
alfadur
parents: 14784
diff changeset
   426
            common::get_teams(replay.teams.iter(), client_id, response);
a1077e8d26f4 implement watch message apart from replay deserializing
alfadur
parents: 14784
diff changeset
   427
            response.add(RunGame.send_self());
a1077e8d26f4 implement watch message apart from replay deserializing
alfadur
parents: 14784
diff changeset
   428
            response.add(ForwardEngineMessage(replay.message_log).send_self());
14907
c156273b57de add REPLAY_START support
alfadur
parents: 14802
diff changeset
   429
c156273b57de add REPLAY_START support
alfadur
parents: 14802
diff changeset
   430
            if protocol < 58 {
c156273b57de add REPLAY_START support
alfadur
parents: 14802
diff changeset
   431
                response.add(Kicked.send_self());
c156273b57de add REPLAY_START support
alfadur
parents: 14802
diff changeset
   432
            }
14785
a1077e8d26f4 implement watch message apart from replay deserializing
alfadur
parents: 14784
diff changeset
   433
        }
a1077e8d26f4 implement watch message apart from replay deserializing
alfadur
parents: 14784
diff changeset
   434
        IoResult::Replay(None) => {
15441
61a0bd0bb021 refactor root handler
alfadur
parents: 15439
diff changeset
   435
            response.warn(REPLAY_LOAD_FAILED);
14785
a1077e8d26f4 implement watch message apart from replay deserializing
alfadur
parents: 14784
diff changeset
   436
        }
14780
65861ba8b4e8 move room saves to IO thread
alfadur
parents: 14779
diff changeset
   437
        IoResult::SaveRoom(_, true) => {
15441
61a0bd0bb021 refactor root handler
alfadur
parents: 15439
diff changeset
   438
            response.add(server_chat(ROOM_CONFIG_SAVED.to_string()).send_self());
14780
65861ba8b4e8 move room saves to IO thread
alfadur
parents: 14779
diff changeset
   439
        }
65861ba8b4e8 move room saves to IO thread
alfadur
parents: 14779
diff changeset
   440
        IoResult::SaveRoom(_, false) => {
15441
61a0bd0bb021 refactor root handler
alfadur
parents: 15439
diff changeset
   441
            response.warn(ROOM_CONFIG_SAVE_FAILED);
14780
65861ba8b4e8 move room saves to IO thread
alfadur
parents: 14779
diff changeset
   442
        }
65861ba8b4e8 move room saves to IO thread
alfadur
parents: 14779
diff changeset
   443
        IoResult::LoadRoom(room_id, Some(contents)) => {
65861ba8b4e8 move room saves to IO thread
alfadur
parents: 14779
diff changeset
   444
            if let Some(ref mut room) = server.rooms.get_mut(room_id) {
65861ba8b4e8 move room saves to IO thread
alfadur
parents: 14779
diff changeset
   445
                match room.set_saves(&contents) {
15441
61a0bd0bb021 refactor root handler
alfadur
parents: 15439
diff changeset
   446
                    Ok(_) => response.add(server_chat(ROOM_CONFIG_LOADED.to_string()).send_self()),
14780
65861ba8b4e8 move room saves to IO thread
alfadur
parents: 14779
diff changeset
   447
                    Err(e) => {
65861ba8b4e8 move room saves to IO thread
alfadur
parents: 14779
diff changeset
   448
                        warn!("Error while deserializing the room configs: {}", e);
15441
61a0bd0bb021 refactor root handler
alfadur
parents: 15439
diff changeset
   449
                        response.warn(ROOM_CONFIG_DESERIALIZE_FAILED);
14780
65861ba8b4e8 move room saves to IO thread
alfadur
parents: 14779
diff changeset
   450
                    }
65861ba8b4e8 move room saves to IO thread
alfadur
parents: 14779
diff changeset
   451
                }
65861ba8b4e8 move room saves to IO thread
alfadur
parents: 14779
diff changeset
   452
            }
65861ba8b4e8 move room saves to IO thread
alfadur
parents: 14779
diff changeset
   453
        }
14781
01f8ab45f806 fix lobby joining
alfadur
parents: 14780
diff changeset
   454
        IoResult::LoadRoom(_, None) => {
15441
61a0bd0bb021 refactor root handler
alfadur
parents: 15439
diff changeset
   455
            response.warn(ROOM_CONFIG_LOAD_FAILED);
14780
65861ba8b4e8 move room saves to IO thread
alfadur
parents: 14779
diff changeset
   456
        }
14779
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14696
diff changeset
   457
    }
f43ab2bd76ae add a thread for internal server IO and implement account checking with it
alfadur
parents: 14696
diff changeset
   458
}
15163
bcb98009ad39 avoid allocation in hash comparison
alfadur
parents: 15113
diff changeset
   459
bcb98009ad39 avoid allocation in hash comparison
alfadur
parents: 15113
diff changeset
   460
#[cfg(test)]
bcb98009ad39 avoid allocation in hash comparison
alfadur
parents: 15113
diff changeset
   461
mod test {
bcb98009ad39 avoid allocation in hash comparison
alfadur
parents: 15113
diff changeset
   462
    use super::Sha1Digest;
bcb98009ad39 avoid allocation in hash comparison
alfadur
parents: 15113
diff changeset
   463
bcb98009ad39 avoid allocation in hash comparison
alfadur
parents: 15113
diff changeset
   464
    #[test]
bcb98009ad39 avoid allocation in hash comparison
alfadur
parents: 15113
diff changeset
   465
    fn hash_cmp_test() {
bcb98009ad39 avoid allocation in hash comparison
alfadur
parents: 15113
diff changeset
   466
        let hash = Sha1Digest([
bcb98009ad39 avoid allocation in hash comparison
alfadur
parents: 15113
diff changeset
   467
            0x37, 0xC4, 0x9F, 0x5C, 0xC3, 0xC9, 0xDB, 0xFC, 0x54, 0xAC, 0x22, 0x04, 0xF6, 0x12,
bcb98009ad39 avoid allocation in hash comparison
alfadur
parents: 15113
diff changeset
   468
            0x9A, 0xED, 0x69, 0xB1, 0xC4, 0x5C,
bcb98009ad39 avoid allocation in hash comparison
alfadur
parents: 15113
diff changeset
   469
        ]);
bcb98009ad39 avoid allocation in hash comparison
alfadur
parents: 15113
diff changeset
   470
bcb98009ad39 avoid allocation in hash comparison
alfadur
parents: 15113
diff changeset
   471
        assert_eq!(hash, &format!("{:x}", hash)[..]);
bcb98009ad39 avoid allocation in hash comparison
alfadur
parents: 15113
diff changeset
   472
    }
bcb98009ad39 avoid allocation in hash comparison
alfadur
parents: 15113
diff changeset
   473
}