*/
    RdmaConnection connect(String hostname, int port) throws IOException;

    /**
     * Register memory region for RDMA operations
     *
     * @param buffer memory buffer to register
     * @param access access permissions for the memory region
     * @return registered memory region
     * @throws IOException if memory registration fails
     */

    /**
     * Get request type
     *
     * @return type of request
     */
    public RequestType getType() {
        return type;
    }

    /**
     * Get associated memory region
     *
     * @return memory region for this request
     */
    public RdmaMemoryRegion getMemoryRegion() {
        return memoryRegion;
    }

    /**
     * Check if request is completed
     *

    /**
     * Send data using RDMA
     *
     * @param data data buffer to send
     * @param region registered memory region for the data
     * @throws IOException if send fails
     */
    public abstract void send(ByteBuffer data, RdmaMemoryRegion region) throws IOException;

    /**
     * Receive data using RDMA
     *
     * @param timeout timeout in milliseconds

    /**
     * Create new RDMA channel info
     *
     * @param remoteKey remote memory key for RDMA access (token)
     * @param address remote memory address (offset)
     * @param length length of the memory region
     */
    public RdmaChannelInfo(int remoteKey, long address, int length) {
        // Create SMB2_RDMA_TRANSFORM structure
        this.transform = new Smb2RdmaTransform(address, remoteKey, length);
    }

    /**

    /**
     * Traditional send/receive with RDMA
     */
    RDMA_SEND_RECEIVE,

    /**
     * Dynamic memory registration
     */
    MEMORY_REGISTRATION,

    /**
     * Fast memory region registration
     */
    FAST_REGISTRATION

- Fixed CSI migration of Azure Disk in-tree StorageClasses with topology requirements in Azure regions that do not have availability zones. ([#109154](https://github.com/kubernetes/kubernetes/pull/109154), [@jsafrane](https://github.com/jsafrane))

    public void send(ByteBuffer data, RdmaMemoryRegion region) throws IOException {
        if (state != RdmaConnectionState.ESTABLISHED && state != RdmaConnectionState.CONNECTED) {
            throw new IOException("Connection not established");
        }

        try {
            // In real implementation, this would send using DiSNI:
            // DisniMemoryRegion disniRegion = (DisniMemoryRegion) region;
            // IbvSendWR sendWR = new IbvSendWR();

     * The first 8 bytes of this are placed in the signature field.
     *
     * @param data
     *            The data.
     * @param offset
     *            The starting offset at which the SMB header begins.
     * @param length
     *            The length of the SMB data starting at offset.
     * @param request
     *            request message
     * @param response
     *            response message
     */

    }

    /**
     * Add RDMA channel information for direct memory access
     *
     * @param remoteKey remote memory key
     * @param address remote memory address
     * @param length length of memory region
     */
    public void addRdmaChannelInfo(int remoteKey, long address, int length) {
        this.rdmaChannelInfo = new RdmaChannelInfo(remoteKey, address, length);
        this.channel = Smb2Constants.SMB2_CHANNEL_RDMA_V1;

import java.util.Iterator;
import java.util.NoSuchElementException;
import org.jspecify.annotations.Nullable;

/**
 * Note this class is a copy of {@link com.google.common.collect.AbstractIterator} (for dependency
 * reasons).
 */
@GwtCompatible
abstract class AbstractIterator<T extends @Nullable Object> implements Iterator<T> {
  private State state = State.NOT_READY;

  protected AbstractIterator() {}

  private enum State {