diff -r 7732013ce64c -r c5a6e8566425 rust/hedgewars-server/src/handlers/inlobby.rs
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rust/hedgewars-server/src/handlers/inlobby.rs	Tue May 28 19:04:18 2019 +0300
@@ -0,0 +1,164 @@
+use mio;
+
+use super::common::rnd_reply;
+use crate::{
+    protocol::messages::{
+        add_flags, remove_flags, server_chat, HWProtocolMessage, HWServerMessage::*,
+        ProtocolFlags as Flags,
+    },
+    core::{
+        client::HWClient,
+        server::HWServer,
+        types::{ClientId, ServerVar},
+    },
+    utils::is_name_illegal,
+};
+use log::*;
+use std::{collections::HashSet, convert::identity};
+
+pub fn handle(
+    server: &mut HWServer,
+    client_id: ClientId,
+    response: &mut super::Response,
+    message: HWProtocolMessage,
+) {
+    use crate::protocol::messages::HWProtocolMessage::*;
+    match message {
+        CreateRoom(name, password) => {
+            if is_name_illegal(&name) {
+                response.add(Warning("Illegal room name! A room name must be between 1-40 characters long, must not have a trailing or leading space and must not have any of these characters: $()*+?[]^{|}".to_string()).send_self());
+            } else if server.has_room(&name) {
+                response.add(
+                    Warning("A room with the same name already exists.".to_string()).send_self(),
+                );
+            } else {
+                let flags_msg = ClientFlags(
+                    add_flags(&[Flags::RoomMaster, Flags::Ready]),
+                    vec![server.clients[client_id].nick.clone()],
+                );
+
+                let room_id = server.create_room(client_id, name, password);
+                let room = &server.rooms[room_id];
+                let client = &server.clients[client_id];
+
+                response.add(
+                    RoomAdd(room.info(Some(&client)))
+                        .send_all()
+                        .with_protocol(room.protocol_number),
+                );
+                response.add(RoomJoined(vec![client.nick.clone()]).send_self());
+                response.add(flags_msg.send_self());
+
+                response.add(
+                    ClientFlags(add_flags(&[Flags::InRoom]), vec![client.nick.clone()]).send_self(),
+                );
+            };
+        }
+        Chat(msg) => {
+            response.add(
+                ChatMsg {
+                    nick: server.clients[client_id].nick.clone(),
+                    msg,
+                }
+                .send_all()
+                .in_lobby()
+                .but_self(),
+            );
+        }
+        JoinRoom(name, _password) => {
+            let room = server.rooms.iter().find(|(_, r)| r.name == name);
+            let room_id = room.map(|(_, r)| r.id);
+
+            let client = &mut server.clients[client_id];
+
+            if let Some((_, room)) = room {
+                if client.protocol_number != room.protocol_number {
+                    response.add(
+                        Warning("Room version incompatible to your Hedgewars version!".to_string())
+                            .send_self(),
+                    );
+                } else if room.is_join_restricted() {
+                    response.add(
+                        Warning(
+                            "Access denied. This room currently doesn't allow joining.".to_string(),
+                        )
+                        .send_self(),
+                    );
+                } else if room.players_number == u8::max_value() {
+                    response.add(Warning("This room is already full".to_string()).send_self());
+                } else if let Some(room_id) = room_id {
+                    super::common::enter_room(server, client_id, room_id, response);
+                }
+            } else {
+                response.add(Warning("No such room.".to_string()).send_self());
+            }
+        }
+        Follow(nick) => {
+            if let Some(HWClient {
+                room_id: Some(room_id),
+                ..
+            }) = server.find_client(&nick)
+            {
+                let room = &server.rooms[*room_id];
+                response.add(Joining(room.name.clone()).send_self());
+                super::common::enter_room(server, client_id, *room_id, response);
+            }
+        }
+        SetServerVar(var) => {
+            if !server.clients[client_id].is_admin() {
+                response.add(Warning("Access denied.".to_string()).send_self());
+            } else {
+                match var {
+                    ServerVar::MOTDNew(msg) => server.greetings.for_latest_protocol = msg,
+                    ServerVar::MOTDOld(msg) => server.greetings.for_old_protocols = msg,
+                    ServerVar::LatestProto(n) => server.latest_protocol = n,
+                }
+            }
+        }
+        GetServerVar => {
+            if !server.clients[client_id].is_admin() {
+                response.add(Warning("Access denied.".to_string()).send_self());
+            } else {
+                let vars: Vec<_> = [
+                    ServerVar::MOTDNew(server.greetings.for_latest_protocol.clone()),
+                    ServerVar::MOTDOld(server.greetings.for_old_protocols.clone()),
+                    ServerVar::LatestProto(server.latest_protocol),
+                ]
+                .iter()
+                .flat_map(|v| v.to_protocol())
+                .collect();
+                response.add(ServerVars(vars).send_self());
+            }
+        }
+        Rnd(v) => {
+            response.add(rnd_reply(&v).send_self());
+        }
+        Stats => {
+            let mut protocols: HashSet<_> = server
+                .clients
+                .iter()
+                .map(|(_, c)| c.protocol_number)
+                .chain(server.rooms.iter().map(|(_, r)| r.protocol_number))
+                .collect();
+            let mut protocols: Vec<_> = protocols.drain().collect();
+            protocols.sort();
+
+            let mut html = Vec::with_capacity(protocols.len() + 2);
+
+            html.push("<table>".to_string());
+            for protocol in protocols {
+                html.push(format!(
+                    "<tr><td>{}</td><td>{}</td><td>{}</td></tr>",
+                    super::utils::protocol_version_string(protocol),
+                    server.protocol_clients(protocol).count(),
+                    server.protocol_rooms(protocol).count()
+                ));
+            }
+            html.push("</table>".to_string());
+
+            response.add(Warning(html.join("")).send_self());
+        }
+        List => warn!("Deprecated LIST message received"),
+        _ => warn!("Incorrect command in lobby state"),
+    }
+}