diff -r 6843c4551cde -r 06672690d71b rust/hedgewars-server/src/utils.rs
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rust/hedgewars-server/src/utils.rs	Mon Dec 10 22:44:46 2018 +0100
@@ -0,0 +1,67 @@
+use std::iter::Iterator;
+use mio;
+use base64::{encode};
+
+pub const PROTOCOL_VERSION : u32 = 3;
+pub const SERVER: mio::Token = mio::Token(1_000_000_000);
+
+pub fn is_name_illegal(name: &str ) -> bool{
+    name.len() > 40 ||
+        name.trim().is_empty() ||
+        name.chars().any(|c|
+            "$()*+?[]^{|}\x7F".contains(c) ||
+                '\x00' <= c && c <= '\x1F')
+}
+
+pub fn to_engine_msg<T>(msg: T) -> String
+    where T: Iterator<Item = u8> + Clone
+{
+    let mut tmp = Vec::new();
+    tmp.push(msg.clone().count() as u8);
+    tmp.extend(msg);
+    encode(&tmp)
+}
+
+pub fn protocol_version_string(protocol_number: u16) -> &'static str {
+    match protocol_number {
+        17 => "0.9.7-dev",
+        19 => "0.9.7",
+        20 => "0.9.8-dev",
+        21 => "0.9.8",
+        22 => "0.9.9-dev",
+        23 => "0.9.9",
+        24 => "0.9.10-dev",
+        25 => "0.9.10",
+        26 => "0.9.11-dev",
+        27 => "0.9.11",
+        28 => "0.9.12-dev",
+        29 => "0.9.12",
+        30 => "0.9.13-dev",
+        31 => "0.9.13",
+        32 => "0.9.14-dev",
+        33 => "0.9.14",
+        34 => "0.9.15-dev",
+        35 => "0.9.14.1",
+        37 => "0.9.15",
+        38 => "0.9.16-dev",
+        39 => "0.9.16",
+        40 => "0.9.17-dev",
+        41 => "0.9.17",
+        42 => "0.9.18-dev",
+        43 => "0.9.18",
+        44 => "0.9.19-dev",
+        45 => "0.9.19",
+        46 => "0.9.20-dev",
+        47 => "0.9.20",
+        48 => "0.9.21-dev",
+        49 => "0.9.21",
+        50 => "0.9.22-dev",
+        51 => "0.9.22",
+        52 => "0.9.23-dev",
+        53 => "0.9.23",
+        54 => "0.9.24-dev",
+        55 => "0.9.24",
+        56 => "0.9.25-dev",
+        _ => "Unknown"
+    }
+}
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