Initial valve setup and tf2 game setup

src/utils.rs

@@ -0,0 +1,20 @@
+use std::ops::Add;
+
+pub fn concat_u8(first: &[u8], second: &[u8]) -> Vec<u8> {
+    [first, second].concat()
+}
+
+pub fn find_null_in_array(arr: &[u8]) -> usize {
+    match arr.iter().position(|&x| x == 0) {
+        None => arr.len(),
+        Some(position) => position
+    }
+}
+
+pub fn complete_address(address: &str, port: u16) -> String {
+    String::from(address.to_owned() + ":").add(&*port.to_string())
+}
+
+pub fn combine_two_u8(high: u8, low: u8) -> u16 {
+    ((high as u16) << 8) | low as u16
+}