try {
            rdmaConnection.close();
        } finally {
            bufferManager.cleanup();
            super.disconnect();
        }
    }
    
    public RdmaProvider getProvider() {
        return provider;
    }
    
    public RdmaConnection getConnection() {
        return rdmaConnection;
    }
}
```

### 4.4 RDMA Buffer Manager
```java

    private static final int SIGNATURE_LENGTH = 16;

    @BeforeAll
    static void setupClass() {
        // Ensure BouncyCastle provider is available for AES-CMAC
        if (Security.getProvider(BouncyCastleProvider.PROVIDER_NAME) == null) {
            Security.addProvider(new BouncyCastleProvider());
        }
    }

    @BeforeEach
    void setup() {
        sessionKey = new byte[16];