Clean up initial/handshake ciphers a little more intelligently.

Summary: Right now we are running the handshakeConfirmed code a lot on the client. This is excessive. We only need to run the code if we haven't already dropped the cipher.

Reviewed By: yangchi

Differential Revision: D27725974

fbshipit-source-id: ca325c132debdd280e447ca30876488b879ff13c

quic/api/QuicTransportFunctions.cpp

@@ -1664,4 +1664,10 @@ void handshakeConfirmed(QuicConnectionStateBase& conn) {
   implicitAckCryptoStream(conn, EncryptionLevel::Handshake);
 }
 
+bool hasInitialOrHandshakeCiphers(QuicConnectionStateBase& conn) {
+  return conn.initialWriteCipher || conn.handshakeWriteCipher ||
+      conn.readCodec->getInitialCipher() ||
+      conn.readCodec->getHandshakeReadCipher();
+}
+
 } // namespace quic