}

        final Smb2NegotiateResponse resp = (Smb2NegotiateResponse) this.negotiated;
        final DialectVersion dialect = resp.getSelectedDialect();
        int cipherId = -1;

        if (dialect.atLeast(DialectVersion.SMB311)) {
            cipherId = resp.getSelectedCipher();
            if (cipherId == -1) {

            this.nativeOs = value;
        }

        value = props.getProperty("jcifs.smb.client.nativeLanMan");
        if (value != null) {
            this.nativeLanMan = value;
        }

        // Dialect version properties - these should throw exceptions for invalid values
        String minVersion = props.getProperty("jcifs.smb.client.minVersion");
        String maxVersion = props.getProperty("jcifs.smb.client.maxVersion");

    @Override
    public boolean canReuse(final CIFSContext tc, final boolean forceSigning) {
        return this.getConfig().equals(tc.getConfig());
    }

    /**
     * Returns the index of the selected SMB dialect from the negotiation.
     *
     * @return the dialectIndex
     */
    public int getDialectIndex() {
        return this.dialectIndex;
    }

    /**

    /** Set of commands that should not be used in compound requests */
    protected Set<String> disallowCompound;
    /** Minimum SMB dialect version to negotiate */
    protected DialectVersion minVersion;
    /** Maximum SMB dialect version to negotiate */
    protected DialectVersion maxVersion;
    /** Whether to require secure negotiate validation */
    protected boolean requireSecureNegotiate = true;

            assertThrows(SmbUnsupportedOperationException.class, () -> transport.createEncryptionContext(new byte[] { 1 }, null));
        }

        @Test
        @DisplayName("createEncryptionContext rejects pre-SMB3 dialect")
        void createEncryptionContext_rejects_oldDialect() throws Exception {
            setField(transport, "smb2", true);
            Smb2NegotiateResponse nego = new Smb2NegotiateResponse(cfg);

            negotiate(altPort, resp);
            port = altPort;
        }

        if (resp.dialectIndex > 10) {
            throw new SmbException("This client does not support the negotiated dialect.");
        }
        if ((server.capabilities & CAP_EXTENDED_SECURITY) != CAP_EXTENDED_SECURITY && server.encryptionKeyLength != 8
                && LM_COMPATIBILITY == 0) {

    /**
     * SMB command to disconnect from a tree share.
     */
    public static final byte SMB_COM_TREE_DISCONNECT = (byte) 0x71;

    /**
     * SMB command to negotiate protocol dialect.
     */
    public static final byte SMB_COM_NEGOTIATE = (byte) 0x72;

    /**
     * SMB command to setup a session with extended attributes.
     */

2CB8          ; mapped                 ; 2CB9          # 4.1  COPTIC CAPITAL LETTER DIALECT-P KAPA
2CB9          ; valid                                  # 4.1  COPTIC SMALL LETTER DIALECT-P KAPA
2CBA          ; mapped                 ; 2CBB          # 4.1  COPTIC CAPITAL LETTER DIALECT-P NI
2CBB          ; valid                                  # 4.1  COPTIC SMALL LETTER DIALECT-P NI

# RDMA (SMB Direct) Feature - Detailed Design Document

## 1. Overview

SMB Direct enables high-performance data transfer using Remote Direct Memory Access (RDMA) technology. This provides ultra-low latency and high bandwidth data transfer by bypassing the traditional TCP/IP stack and allowing direct memory-to-memory transfers between client and server.

## 2. Protocol Specification Reference

- **MS-SMBD**: SMB2 Remote Direct Memory Access (RDMA) Transport Protocol

    @Override
    int writeBytesWireFormat(final byte[] dst, final int dstIndex) {
        byte[] dialects;
        try {
            dialects = DIALECTS.getBytes("ASCII");
        } catch (final UnsupportedEncodingException uee) {
            return 0;
        }
        System.arraycopy(dialects, 0, dst, dstIndex, dialects.length);
        return dialects.length;
    }

    @Override