bin/ircd: restrict nicknamesn to have a maximum length of nine characters

bin/ircd/src/protocol_privmsg.rs

@@ -59,6 +59,10 @@ impl ProtocolPrivmsg {
         loop {
             let msg = self.msg_sub.receive().await?;
 
+            if msg.nickname.len() > 10 {
+                continue
+            }
+
             if self.msg_ids.lock().await.contains(&msg.id) {
                 continue
             }

bin/ircd/src/server.rs

@@ -111,6 +111,11 @@ impl IrcServerConnection {
             }
             "NICK" => {
                 let nickname = tokens.next().ok_or(Error::MalformedPacket)?;
+
+                if nickname.len() > 10 {
+                    return Ok(())
+                }
+
                 self.is_nick_init = true;
                 let old_nick = std::mem::replace(&mut self.nickname, nickname.to_string());