split out more files

src/packet.rs

@@ -0,0 +1,22 @@
+pub struct Header(pub u16, pub u16, pub u16, pub u16, pub u16);
+
+pub type Payload = Vec<u8>;
+
+pub struct Packet(pub Header, pub Payload);
+
+impl Packet {
+    pub fn to_bytes(&self) -> Vec<u8> {
+        let Packet(Header(mode, a, b, c, d), payload) = self;
+
+        let mut packet = vec!(0u8; 10 + payload.len());
+        packet[0..=1].copy_from_slice(&u16::to_be_bytes(*mode));
+        packet[2..=3].copy_from_slice(&u16::to_be_bytes(*a));
+        packet[4..=5].copy_from_slice(&u16::to_be_bytes(*b));
+        packet[6..=7].copy_from_slice(&u16::to_be_bytes(*c));
+        packet[8..=9].copy_from_slice(&u16::to_be_bytes(*d));
+
+        packet[10..].copy_from_slice(&*payload);
+
+        return packet;
+    }
+}