示例#1
0
        ///<summary>
        ///Parse AARQ request that client send and returns AARE request.
        /// </summary>
        ///<returns>
        ///Reply to the client.
        ///</returns>
        private void HandleAarqRequest(GXByteBuffer data, GXDLMSConnectionEventArgs connectionInfo)
        {
            AssociationResult result = AssociationResult.Accepted;

            Settings.CtoSChallenge = null;
            if (!Settings.UseCustomChallenge)
            {
                Settings.StoCChallenge = null;
            }
            // Reset settings for wrapper.
            if (Settings.InterfaceType == InterfaceType.WRAPPER)
            {
                Reset(true);
            }
            SourceDiagnostic diagnostic = GXAPDU.ParsePDU(Settings, Settings.Cipher, data, null);

            if (diagnostic != SourceDiagnostic.None)
            {
                result     = AssociationResult.PermanentRejected;
                diagnostic = SourceDiagnostic.ApplicationContextNameNotSupported;
                InvalidConnection(connectionInfo);
            }
            else
            {
                diagnostic = ValidateAuthentication(Settings.Authentication, Settings.Password);
                if (diagnostic != SourceDiagnostic.None)
                {
                    result = AssociationResult.PermanentRejected;
                    InvalidConnection(connectionInfo);
                }
                else if (Settings.Authentication > Authentication.Low)
                {
                    // If High authentication is used.
                    if (!Settings.UseCustomChallenge)
                    {
                        Settings.StoCChallenge = GXSecure.GenerateChallenge(Settings.Authentication);
                    }
                    result     = AssociationResult.Accepted;
                    diagnostic = SourceDiagnostic.AuthenticationRequired;
                }
                else
                {
                    Connected(connectionInfo);
                    Settings.Connected = true;
                }
            }
            Settings.IsAuthenticationRequired = diagnostic == SourceDiagnostic.AuthenticationRequired;
            if (Settings.InterfaceType == Enums.InterfaceType.HDLC)
            {
                replyData.Set(GXCommon.LLCReplyBytes);
            }
            // Generate AARE packet.
            GXAPDU.GenerateAARE(Settings, replyData, result, diagnostic, Settings.Cipher, null);
        }
示例#2
0
        ///<summary>
        ///Parse AARQ request that client send and returns AARE request.
        /// </summary>
        ///<returns>
        ///Reply to the client.
        ///</returns>
        private byte[][] HandleAarqRequest()
        {
            AssociationResult result = AssociationResult.Accepted;

            Settings.CtoSChallenge = null;
            if (!Settings.UseCustomChallenge)
            {
                Settings.StoCChallenge = null;
            }
            SourceDiagnostic diagnostic = GXAPDU.ParsePDU(Settings, Settings.Cipher, Reply.Data);

            if (diagnostic != SourceDiagnostic.None)
            {
                result     = AssociationResult.PermanentRejected;
                diagnostic = SourceDiagnostic.ApplicationContextNameNotSupported;
            }
            else
            {
                // Check that user can access server.
                diagnostic = ValidateAuthentication(Settings.Authentication, Settings.Password);
                if (diagnostic != SourceDiagnostic.None)
                {
                    result = AssociationResult.PermanentRejected;
                }
                else if (Settings.Authentication > Authentication.Low)
                {
                    // If High authentication is used.
                    Settings.StoCChallenge = GXSecure.GenerateChallenge(Settings.Authentication);
                    result     = AssociationResult.Accepted;
                    diagnostic = SourceDiagnostic.AuthenticationRequired;
                }
            }
            // Generate AARE packet.
            GXByteBuffer buff = new GXByteBuffer(150);

            GXAPDU.GenerateAARE(Settings, buff, result, diagnostic, Settings.Cipher);
            return(GXDLMS.SplitPdu(Settings, Command.Aare, 0, buff,
                                   ErrorCode.Ok, DateTime.MinValue)[0]);
        }