*
 * Credits are used to control the flow of messages between
 * RDMA peers to prevent buffer overflow.
 */
public class RdmaCredits {

    private int initialCredits;
    private int creditsGranted;

    /**
     * Create new RDMA credits manager
     */
    public RdmaCredits() {
        this.initialCredits = RdmaCapabilities.DEFAULT_SEND_CREDIT_TARGET;
        this.creditsGranted = 0;
    }

    /**

        props.setProperty("jcifs.smb.client.rdmaMaxSendSize", "131072");
        props.setProperty("jcifs.smb.client.rdmaMaxReceiveSize", "131072");
        props.setProperty("jcifs.smb.client.rdmaCredits", "512");

        PropertyConfiguration config = new PropertyConfiguration(props);

        assertTrue(config.isUseRDMA(), "RDMA should be enabled");

            } catch (NumberFormatException e) {
                // Invalid value ignored
            }
        }

        value = props.getProperty("jcifs.smb.client.rdmaCredits");
        if (value != null) {
            try {
                this.rdmaCredits = Integer.parseInt(value);
            } catch (NumberFormatException e) {
                // Invalid value ignored
            }
        }

        // RDMA port

public static final String RDMA_MAX_SEND_SIZE = "jcifs.smb.client.rdmaMaxSendSize";
public static final String RDMA_MAX_RECEIVE_SIZE = "jcifs.smb.client.rdmaMaxReceiveSize";
public static final String RDMA_CREDITS = "jcifs.smb.client.rdmaCredits";

public boolean isUseRDMA() {
    String value = getProperty(USE_RDMA, "auto");
    return "true".equals(value) || ("auto".equals(value) && isRdmaAvailable());
}

            this.rdmaMaxSendSize = 65536; // 64KB
        }
        if (this.rdmaMaxReceiveSize == 0) {
            this.rdmaMaxReceiveSize = 65536; // 64KB
        }
        if (this.rdmaCredits == 0) {
            this.rdmaCredits = 255;
        }
    }

    /**
     * Parse channel binding policy from string
     *
     * @param policy policy string
     * @return policy constant
     */

    // Connection state
    /** Current connection state */
    protected volatile RdmaConnectionState state;
    /** Credit management for SMB Direct */
    protected RdmaCredits credits;
    /** Maximum size for fragmented operations */
    protected int maxFragmentedSize;
    /** Maximum size for RDMA read/write operations */
    protected int maxReadWriteSize;

    /**