* **reactive** authentication after receiving a challenge from either an origin web server or proxy
 * server.
 *
 * ## Preemptive Authentication
 *
 * To make HTTPS calls using an HTTP proxy server OkHttp must first negotiate a connection with
 * the proxy. This proxy connection is called a "TLS Tunnel" and is specified by
 * [RFC 2817][1]. The HTTP CONNECT request that creates this tunnel connection is special: it

    /**
     * Negotiate RDMA parameters
     *
     * @param request negotiation request parameters
     * @return negotiation response
     * @throws IOException if negotiation fails
     */
    public abstract RdmaNegotiateResponse negotiate(RdmaNegotiateRequest request) throws IOException;

    /**

        assertTrue(context.isEstablished());
        assertArrayEquals(serverChallenge, context.getServerChallenge());
        // Signing key may or may not be generated depending on flags negotiation
        // The context negotiates flags with server, so we can't guarantee signing key
    }

    @Test
    void testInitSecContext_state2_withoutSigning() throws Exception {

        assertSame(transport, t);
        verify(transport, times(1)).acquire();
    }

    @Test
    @DisplayName("isSignatureSetupRequired depends on digest and negotiate flags")
    void testIsSignatureSetupRequired() throws Exception {
        SmbSessionImpl session = newSession();

        // Case 1: digest already set -> false

     * @return A <code>byte[]</code> containing the local security
     * context.  This is used by the client to negotiate local
     * authentication.
     */
    public byte[] getContext() {
        return context;
    }

    /**
     * Sets the local security context.  This is used by the client
     * to negotiate local authentication.
     *
     * @param context The local security context.
     */

        // TCP fallback doesn't support real RDMA write
        throw new UnsupportedOperationException("RDMA write not supported by TCP fallback");
    }

    @Override
    public RdmaNegotiateResponse negotiate(RdmaNegotiateRequest request) throws IOException {
        // For TCP fallback, we simulate successful negotiation
        RdmaNegotiateResponse response = new RdmaNegotiateResponse();
        response.setStatus(0); // Success

            boolean result = response.verifySignature(buffer, 0, 100);

            assertTrue(result);
        }

        @Test
        @DisplayName("Should verify signature on error when secure negotiate required")
        void testVerifySignatureErrorWithSecureNegotiate() {
            byte[] buffer = new byte[100];
            response.setDigest(mockDigest);

There may be many routes for a single address. For example, a webserver that is hosted in multiple datacenters may yield multiple IP addresses in its DNS response.

    /**
     * Function code to trim file level storage
     */
    public static final int FSCTL_FILE_LEVEL_TRIM = 0x00098208;
    /**
     * Function code to validate SMB2 negotiate information
     */
    public static final int FSCTL_VALIDATE_NEGOTIATE_INFO = 0x000140204;

    /**
     * Flag indicating this IOCTL is a file system control operation
     */

		mfs, err := gatherers.Gather()
		if err != nil {
			if len(mfs) == 0 {
				writeErrorResponseJSON(r.Context(), w, toAdminAPIErr(r.Context(), err), r.URL)
				return
			}
		}

		contentType := expfmt.Negotiate(r.Header)
		w.Header().Set("Content-Type", string(contentType))

		enc := expfmt.NewEncoder(w, contentType)
		for _, mf := range mfs {
			if err := enc.Encode(mf); err != nil {