diff -r 6843c4551cde -r 06672690d71b rust/hedgewars-server/src/server/handlers/lobby.rs
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rust/hedgewars-server/src/server/handlers/lobby.rs	Mon Dec 10 22:44:46 2018 +0100
@@ -0,0 +1,72 @@
+use mio;
+
+use crate::{
+    server::{
+        core::HWServer,
+        coretypes::ClientId,
+        actions::{Action, Action::*}
+    },
+    protocol::messages::{
+        HWProtocolMessage,
+        HWServerMessage::*
+    },
+    utils::is_name_illegal
+};
+use super::common::rnd_reply;
+use log::*;
+
+pub fn handle(server: &mut HWServer, client_id: ClientId, message: HWProtocolMessage) {
+    use crate::protocol::messages::HWProtocolMessage::*;
+    match message {
+        CreateRoom(name, password) => {
+            let actions =
+                if is_name_illegal(&name) {
+                    vec![Warn("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())]
+                } else if server.has_room(&name) {
+                    vec![Warn("A room with the same name already exists.".to_string())]
+                } else {
+                    let flags_msg = ClientFlags(
+                        "+hr".to_string(),
+                        vec![server.clients[client_id].nick.clone()]);
+                    vec![AddRoom(name, password),
+                         flags_msg.send_self().action()]
+                };
+            server.react(client_id, actions);
+        },
+        Chat(msg) => {
+            let actions = vec![ChatMsg {nick: server.clients[client_id].nick.clone(), msg}
+                .send_all().in_room(server.lobby_id).but_self().action()];
+            server.react(client_id, actions);
+        },
+        JoinRoom(name, _password) => {
+            let room = server.rooms.iter().find(|(_, r)| r.name == name);
+            let room_id = room.map(|(_, r)| r.id);
+            let nicks = server.clients.iter()
+                .filter(|(_, c)| c.room_id == room_id)
+                .map(|(_, c)| c.nick.clone())
+                .collect();
+            let c = &mut server.clients[client_id];
+
+            let actions = if let Some((_, r)) = room {
+                if c.protocol_number != r.protocol_number {
+                    vec![Warn("Room version incompatible to your Hedgewars version!".to_string())]
+                } else if r.is_join_restricted() {
+                    vec![Warn("Access denied. This room currently doesn't allow joining.".to_string())]
+                } else if r.players_number == u8::max_value() {
+                    vec![Warn("This room is already full".to_string())]
+                } else {
+                    vec![MoveToRoom(r.id),
+                         RoomJoined(nicks).send_self().action()]
+                }
+            } else {
+                vec![Warn("No such room.".to_string())]
+            };
+            server.react(client_id, actions);
+        },
+        Rnd(v) => {
+            server.react(client_id, vec![rnd_reply(&v).send_self().action()]);
+        },
+        List => warn!("Deprecated LIST message received"),
+        _ => warn!("Incorrect command in lobby state"),
+    }
+}