availableReceiveRegions.size());
    }

    /**
     * Get a send region from the pool or allocate a new one
     *
     * @param minSize minimum required size
     * @return memory region for sending
     * @throws IOException if allocation fails
     */
    public RdmaMemoryRegion getSendRegion(int minSize) throws IOException {
        if (minSize <= sendBufferSize) {

        });
    }

    /**
     * Sends a test mail using the provided notification settings.
     *
     * @param form the mail form containing notification settings
     * @return HTML response after sending test mail
     */
    @Execute
    @Secured({ ROLE })
    public HtmlResponse sendmail(final MailForm form) {
        validate(form, messages -> {}, () -> asHtml(path_AdminGeneral_AdminGeneralJsp));

        if (!connected) {
            throw new IOException("Witness client not connected");
        }

        try {
            log.debug("Sending witness heartbeat for: {}", request.getRegistrationId());

            // Create and populate the RPC message
            WitnessHeartbeatMessage message = new WitnessHeartbeatMessage();

            final SearchRequestParams params, final OptionalThing<FessUserBean> userBean) {
        if (logger.isDebugEnabled()) {
            logger.debug("Sending query to searchers: query={}", query);
        }
        final int pageSize = params.getPageSize();
        final int startPosition = params.getStartPosition();
        if (startPosition * 2 >= windowSize) {

     * @return maximum channels per session
     */
    int getMaxChannels();

    /**
     * Channel binding policy
     *
     * Property {@code jcifs.smb.client.channelBindingPolicy} (String, default "preferred")
     * Values: "disabled", "preferred", "required"
     *
     * @return channel binding policy
     */
    int getChannelBindingPolicy();

    /**
     * Load balancing strategy for multi-channel

     * @param command the command to send to the process
     * @throws JobNotFoundException if no process is found for the given session ID
     * @throws JobProcessingException if there's an error sending the command
     */
    public void sendCommand(final String sessionId, final String command) {
        final Process process;
        synchronized (this) {

            return;
        }
        final Smb2NegotiateRequest negoReq = new Smb2NegotiateRequest(sess.getConfig(), trans.getRequestSecurityMode(nego));

        log.debug("Sending VALIDATE_NEGOTIATE_INFO");
        final Smb2IoctlRequest req = new Smb2IoctlRequest(sess.getConfig(), Smb2IoctlRequest.FSCTL_VALIDATE_NEGOTIATE_INFO);
        req.setFlags(Smb2IoctlRequest.SMB2_O_IOCTL_IS_FSCTL);

/**
 * This class simplifies communication for protocols that support
 * multiplexing requests. It encapsulates a stream and some protocol
 * knowledge (provided by a concrete subclass) so that connecting,
 * disconnecting, sending, and receiving can be syncronized
 * properly. Apparatus is provided to send and receive requests
 * concurrently.
 */

/**
 * Abstract base class for network transport implementations in JCIFS.

            try {
                CommonServerMessageBlockResponse resp = thisReq.getResponse();
                if (log.isTraceEnabled()) {
                    log.trace("Sending " + thisReq);
                }
                resp = super.sendrecv(curHead, resp, params);

                if (!checkStatus(curHead, resp)) {
                    if (log.isDebugEnabled()) {

    
    private void redistributePendingOperations(ChannelInfo failedChannel) {
        // Get pending operations from failed channel
        List<SMBMessage> pendingOps = failedChannel.getPendingOperations();
        
        if (pendingOps.isEmpty()) {
            return;
        }
        
        log.info("Redistributing {} pending operations from failed channel", 
            pendingOps.size());