fix(cbs): added missing parts of the handshake

src/cbs/connection.rs

@@ -56,6 +56,8 @@ impl UnstableConnection {
         let packet = Packet::recv(&mut sock_rx, &cipher, &nonce).await?;
         match packet {
             Packet::Request { id, body } => {
+                match body {
+                    Request::HandshakeUpgradeConnection => {
                         Packet::response(id_pool.acquire(), id, Response::Success)
                             .send(&mut sock_tx, &cipher, &nonce)
                             .await?;
@@ -65,6 +67,11 @@ impl UnstableConnection {
                             id = self.id
                         );
                     }
+                    req => return Err(anyhow!(
+                        "expected cbs to send: Request::HandshakeUpgradeConnection, but got: Request::{req}"
+                    ))
+                }
+            }
             body => {
                 return Err(anyhow!(
                     "expected cbs to send: Request::HandshakeUpgradeConnection, but got: {body}"
@@ -72,6 +79,10 @@ impl UnstableConnection {
             }
         }
 
+        Packet::request(id_pool.acquire(), Request::HandshakeSuccess)
+            .send(&mut sock_tx, &cipher, &nonce)
+            .await?;
+
         // Poll packets from socket
         {
             let cipher = cipher.clone();