r.decode(this.sbuf, 4);
                r.received();

                if (r.getDialectRevision() == Smb2Constants.SMB2_DIALECT_ANY) {
                    return negotiate2(r);
                } else if (r.getDialectRevision() != Smb2Constants.SMB2_DIALECT_0202) {
                    throw new CIFSException("Server returned invalid dialect verison in multi protocol negotiation");

                        }
                        Smb2SigningDigest dgst =
                                new Smb2SigningDigest(this.sessionKey, negoResp.getDialectRevision(), this.preauthIntegrityHash);
                        // verify the server signature here, this is not done automatically as we don't set the
                        // request digest