# MLLPServer Component The MLLPServer component implements the server side of the Minimal Lower Layer Protocol. ## Syntax ```text nsoftware.IPWorksEDI.MLLPServer ``` ## Remarks The MLLPServer component is used to exchange HL7 data with one or more connected MLLP clients. ### Setting up MLLPServer to Listen for Client Connections The first step in using the MLLPServer component is to configure it to listen for MLLP client connections. Start by setting the [LocalPort](#localport-property-mllpserver-component) property to the desired listening port. For multi-homed devices, also set the [LocalHost](#localhost-property-mllpserver-component) property to the address of the network interface the MLLPServer component should listen on. Next, optionally enable TLS/SSL with the [SSLEnabled](#sslenabled-property-mllpserver-component) and [SSLCert](#sslcert-property-mllpserver-component) properties (MLLPServer supports client authentication with the [SSLAuthenticateClients](#sslauthenticateclients-property-mllpserver-component) property). Finally, set the [Listening](#listening-property-mllpserver-component) property to *True* to begin listening for client connections. **Connecting Example** ```text mllpServer.LocalHost = "localhost"; mllpServer.LocalPort = 7777; // The following two lines are only necessary if using TLS/SSL. mllpServer.SSLEnabled = true; mllpServer.SSLCert = new Certificate(CertStoreTypes.cstPFXFile, "..\\path\\to\\cert.pfx", "password", "*"); mllpServer.Listening = true; ``` At this point the [ConnectionRequest](#connectionrequest-event-mllpserver-component) event will fire anytime a client wishes to connect (connection requests are accepted by default), and the [Connected](#connected-event-mllpserver-component) event will fire each time a client successfully connects. While clients are connected, the server may interact with them by using their [ConnectionId](#MLLPConnection_f_ConnectionId) to retrieve an [MLLPConnection](#mllpconnection-type) object from the [Connections](#connections-property-mllpserver-component) map property. ### Receiving Data The MLLPServer component will automatically receive HL7 data sent from each client, and will automatically send acknowledgements back. When the MLLPServer component is receiving data, immediately before data transfer begins the [StartTransfer](#starttransfer-event-mllpserver-component) event fires. During data transfer, one or more [Transfer](#transfer-event-mllpserver-component) events will fire. When data transfer is complete, the [EndTransfer](#endtransfer-event-mllpserver-component) event fires. Any errors during data delivery will cause the [Error](#error-event-mllpserver-component) event to fire. Immediately before the server acknowledgement is sent the [AckOut](#ackout-event-mllpserver-component) event fires. The *Accept* parameter of this event is used to determine the type of acknowledgement (*ACK* or *NAK*) to send back to the client. HL7 data received by the MLLPServer component will be stored in one of the following ways: - If an output stream has been specified for the connection using the [OutputStream](#MLLPConnection_f_OutputStream) field, the data is written to that stream. - Otherwise, if an output file path has been set to the [OutputFileName](#MLLPConnection_f_OutputFileName) field, the data is written to that file. - Otherwise, the data is stored in the [OutputData](#MLLPConnection_f_OutputData) field. ### Sending Data The MLLPServer component may also send data to MLLP clients. First, specify the data to send by doing one of the following: - Set the [InputStream](#MLLPConnection_f_InputStream) field to a stream with HL7 data. - Set the [InputFileName](#MLLPConnection_f_InputFileName) field to the path of a file with HL7 data. - Set the HL7 data directly to the [InputData](#MLLPConnection_f_InputData) field. Once the data has been specified, simply call the [Send](#send-method-mllpserver-component) method with the appropriate connection Id to send the HL7 data to the associated client. Once the client has received the data, it will respond with an acknowledgement, causing the component's [AckIn](#ackin-event-mllpserver-component) event to fire. **Sending Data Example** ```text mllpServer.Connections[connectionId].InputData = "HL7Data"; mllpServer.Send(connectionId); ``` ## Property List *The following is the full list of the properties of the component with short descriptions. Click on the links for further details.* | | | | --- | --- | | [Connections](#connections-property-mllpserver-component) | A map of connected clients. | | [DefaultTimeout](#defaulttimeout-property-mllpserver-component) | This property includes an initial timeout value to be used by incoming connections. | | [KeepAlive](#keepalive-property-mllpserver-component) | When True, KEEPALIVE packets are enabled (for long connections). | | [Listening](#listening-property-mllpserver-component) | This property indicates whether the component is listening for incoming connections on LocalPort. | | [LocalHost](#localhost-property-mllpserver-component) | The name of the local host or user-assigned IP interface through which connections are initiated or accepted. | | [LocalPort](#localport-property-mllpserver-component) | This property includes the Transmission Control Protocol (TCP) port in the local host where the component listens. | | [SSLAuthenticateClients](#sslauthenticateclients-property-mllpserver-component) | If set to True, the server asks the client(s) for a certificate. | | [SSLCert](#sslcert-property-mllpserver-component) | The certificate to be used during Secure Sockets Layer (SSL) negotiation. | | [SSLEnabled](#sslenabled-property-mllpserver-component) | This property indicates whether Transport Layer Security/Secure Sockets Layer (TLS/SSL) is enabled. | | [Version](#version-property-mllpserver-component) | The MLLP version to use. | ## Method List *The following is the full list of the methods of the component with short descriptions. Click on the links for further details.* | | | | --- | --- | | [Config](#config-method-mllpserver-component) | Sets or retrieves a configuration setting. | | [Disconnect](#disconnect-method-mllpserver-component) | This method disconnects the specified client. | | [DoEvents](#doevents-method-mllpserver-component) | This method processes events from the internal message queue. | | [Interrupt](#interrupt-method-mllpserver-component) | This method interrupts a synchronous send to the remote host. | | [Reset](#reset-method-mllpserver-component) | This method will reset the component. | | [Send](#send-method-mllpserver-component) | Send HL7 data to the MLLP client associated with the specified connection Id. | | [Shutdown](#shutdown-method-mllpserver-component) | This method shuts down the server. | | [StartListening](#startlistening-method-mllpserver-component) | This method starts listening for incoming connections. | | [StopListening](#stoplistening-method-mllpserver-component) | This method stops listening for new connections. | ## Event List *The following is the full list of the events fired by the component with short descriptions. Click on the links for further details.* | | | | --- | --- | | [AckIn](#ackin-event-mllpserver-component) | Fires immediately after receiving an acknowledgement from a client. | | [AckOut](#ackout-event-mllpserver-component) | Fires immediately before sending an acknowledgement to a client. | | [Connected](#connected-event-mllpserver-component) | This event is fired immediately after a connection completes (or fails). | | [ConnectionRequest](#connectionrequest-event-mllpserver-component) | This event is fired when a request for connection comes from a remote host. | | [Disconnected](#disconnected-event-mllpserver-component) | This event is fired when a connection is closed. | | [EndTransfer](#endtransfer-event-mllpserver-component) | Fires after incoming HL7 data finishes transferring. | | [Error](#error-event-mllpserver-component) | This event fires information about errors during data delivery. | | [Log](#log-event-mllpserver-component) | Provides logging information. | | [SSLClientAuthentication](#sslclientauthentication-event-mllpserver-component) | This event is fired when the client presents its credentials to the server. | | [SSLConnectionRequest](#sslconnectionrequest-event-mllpserver-component) | This event fires when a Secure Sockets Layer (SSL) connection is requested. | | [SSLStatus](#sslstatus-event-mllpserver-component) | This event is fired to show the progress of the secure connection. | | [StartTransfer](#starttransfer-event-mllpserver-component) | Fires before incoming HL7 data begins transferring. | | [Transfer](#transfer-event-mllpserver-component) | Fires during incoming data transfer. | ## Config Settings *The following is a list of config settings for the component with short descriptions. Click on the links for further details.* | | | | --- | --- | | [ACKChar](#ACKChar) | The positive acknowledgement character. | | [EndBlockChar](#EndBlockChar) | The character that denotes the end of HL7 data. | | [EOLChar](#EOLChar) | The character that denotes the end of a message block. | | [LogLevel](#LogLevel) | The level of detail that is logged. | | [NAKChar](#NAKChar) | The negative acknowledgement character. | | [ReceiveTimeout](#ReceiveTimeout) | Maximum number of seconds to wait after receiving a StartBlockChar. | | [StartBlockChar](#StartBlockChar) | The character that denotes the beginning of HL7 data. | | [CloseStreamAfterTransfer](#CloseStreamAfterTransfer) | If true, the component will close the upload or download stream after the transfer. | | [ConnectionTimeout](#ConnectionTimeout) | Sets a separate timeout value for establishing a connection. | | [EnableFallback](#EnableFallback) | Whether to try the other addresses the remote host resolves to when a connection attempt fails. | | [FallbackTimeout](#FallbackTimeout) | The maximum time in milliseconds to spend on connection attempts when EnableFallback is enabled. | | [FirewallAutoDetect](#FirewallAutoDetect) | Tells the component whether or not to automatically detect and use firewall system settings, if available. | | [FirewallHost](#FirewallHost) | Name or IP address of firewall (optional). | | [FirewallHTTPVersion](#FirewallHTTPVersion) | The HTTP version to be used when connecting through a tunneling proxy. | | [FirewallListener](#FirewallListener) | If true, the component binds to a SOCKS firewall as a server (TCPClient only). | | [FirewallPassword](#FirewallPassword) | Password to be used if authentication is to be used when connecting through the firewall. | | [FirewallPort](#FirewallPort) | The TCP port for the FirewallHost;. | | [FirewallType](#FirewallType) | Determines the type of firewall to connect through. | | [FirewallUser](#FirewallUser) | A user name if authentication is to be used connecting through a firewall. | | [KeepAliveInterval](#KeepAliveInterval) | The retry interval, in milliseconds, to be used when a TCP keep-alive packet is sent and no response is received. | | [KeepAliveTime](#KeepAliveTime) | The inactivity time in milliseconds before a TCP keep-alive packet is sent. | | [Linger](#Linger) | When set to True, connections are terminated gracefully. | | [LingerTime](#LingerTime) | Time in seconds to have the connection linger. | | [LocalHost](#LocalHost) | The name of the local host through which connections are initiated or accepted. | | [LocalPort](#LocalPort) | The port in the local host where the component binds. | | [MaxLineLength](#MaxLineLength) | The maximum amount of data to accumulate when no EOL is found. | | [MaxTransferRate](#MaxTransferRate) | The transfer rate limit in bytes per second. | | [ProxyExceptionsList](#ProxyExceptionsList) | A semicolon separated list of hosts and IPs to bypass when using a proxy. | | [TCPKeepAlive](#TCPKeepAlive) | Determines whether or not the keep alive socket option is enabled. | | [TcpNoDelay](#TcpNoDelay) | Whether or not to delay when sending packets. | | [UseIPv6](#UseIPv6) | Whether to use IPv6. | | [UseNTLMv2](#UseNTLMv2) | Whether to use NTLM V2. | | [CACertFilePaths](#CACertFilePaths) | The paths to CA certificate files when using Mono on Unix/Linux. | | [LogSSLPackets](#LogSSLPackets) | Controls whether SSL packets are logged when using the internal security API. | | [ReuseSSLSession](#ReuseSSLSession) | Determines if the SSL session is reused. | | [SSLCACerts](#SSLCACerts) | A newline separated list of CA certificates to be included when performing an SSL handshake. | | [SSLCheckCRL](#SSLCheckCRL) | Whether to check the Certificate Revocation List for the server certificate. | | [SSLCheckOCSP](#SSLCheckOCSP) | Whether to use OCSP to check the status of the server certificate. | | [SSLCipherStrength](#SSLCipherStrength) | The minimum cipher strength used for bulk encryption. | | [SSLClientCACerts](#SSLClientCACerts) | A newline separated list of CA certificates to use during SSL client certificate validation. | | [SSLEnabledCipherSuites](#SSLEnabledCipherSuites) | The cipher suite to be used in an SSL negotiation. | | [SSLEnabledProtocols](#SSLEnabledProtocols) | Used to enable/disable the supported security protocols. | | [SSLEnableRenegotiation](#SSLEnableRenegotiation) | Whether the renegotiation_info SSL extension is supported. | | [SSLIncludeCertChain](#SSLIncludeCertChain) | Whether the entire certificate chain is included in the SSLServerAuthentication event. | | [SSLKeyLogFile](#SSLKeyLogFile) | The location of a file where per-session secrets are written for debugging purposes. | | [SSLNegotiatedCipher](#SSLNegotiatedCipher) | Returns the negotiated cipher suite. | | [SSLNegotiatedCipherStrength](#SSLNegotiatedCipherStrength) | Returns the negotiated cipher suite strength. | | [SSLNegotiatedCipherSuite](#SSLNegotiatedCipherSuite) | Returns the negotiated cipher suite. | | [SSLNegotiatedKeyExchange](#SSLNegotiatedKeyExchange) | Returns the negotiated key exchange algorithm. | | [SSLNegotiatedKeyExchangeStrength](#SSLNegotiatedKeyExchangeStrength) | Returns the negotiated key exchange algorithm strength. | | [SSLNegotiatedVersion](#SSLNegotiatedVersion) | Returns the negotiated protocol version. | | [SSLSecurityFlags](#SSLSecurityFlags) | Flags that control certificate verification. | | [SSLServerCACerts](#SSLServerCACerts) | A newline separated list of CA certificates to use during SSL server certificate validation. | | [TLS12SignatureAlgorithms](#TLS12SignatureAlgorithms) | Defines the allowed TLS 1.2 signature algorithms when SSLProvider is set to Internal. | | [TLS12SupportedGroups](#TLS12SupportedGroups) | The supported groups for ECC. | | [TLS13KeyShareGroups](#TLS13KeyShareGroups) | The groups for which to pregenerate key shares. | | [TLS13SignatureAlgorithms](#TLS13SignatureAlgorithms) | The allowed certificate signature algorithms. | | [TLS13SupportedGroups](#TLS13SupportedGroups) | The supported groups for (EC)DHE key exchange. | | [AbsoluteTimeout](#AbsoluteTimeout) | Determines whether timeouts are inactivity timeouts or absolute timeouts. | | [FirewallData](#FirewallData) | Used to send extra data to the firewall. | | [InBufferSize](#InBufferSize) | The size in bytes of the incoming queue of the socket. | | [OutBufferSize](#OutBufferSize) | The size in bytes of the outgoing queue of the socket. | | [BuildInfo](#BuildInfo) | Information about the product's build. | | [GUIAvailable](#GUIAvailable) | Whether or not a message loop is available for processing events. | | [LicenseInfo](#LicenseInfo) | Information about the current license. | | [MaskSensitiveData](#MaskSensitiveData) | Whether sensitive data is masked in log messages. | | [UseFIPSCompliantAPI](#UseFIPSCompliantAPI) | Tells the component whether or not to use FIPS certified APIs. | | [UseInternalSecurityAPI](#UseInternalSecurityAPI) | Whether or not to use the system security libraries or an internal implementation. | # Connections Property ([MLLPServer](#mllpserver-component) Component) A map of connected clients. ## Syntax ```text public MLLPConnectionMap Connections { get; } ``` ## Remarks This property is a collection that maps connection Ids to MLLP client connections. [MLLPConnection](#mllpconnection-type) objects are added to and removed from the collection as necessary as MLLP clients connect to and disconnect from the component. **Sending to Multiple Connected Clients Example** ```text foreach (MLLPConnection conn in mllpServer.Connections.Values) { conn.InputData = "HL7Data"; mllpServer.Send(conn.ConnectionId); } ``` This property is read-only. Please refer to the [MLLPConnection](#mllpconnection-type) type for a complete list of fields. # DefaultTimeout Property ([MLLPServer](#mllpserver-component) Component) This property includes an initial timeout value to be used by incoming connections. ## Syntax ```text public int DefaultTimeout { get; set; } ``` ## Default Value 0 ## Remarks This property is used by the component to set the operational timeout value of all inbound connections once they are established. This property defines the timeout when sending data. When [SSLEnabled](#sslenabled-property-mllpserver-component) is False, a value of 0 means data will be sent asynchronously, and a positive value means data is sent synchronously. When [SSLEnabled](#sslenabled-property-mllpserver-component) is True, all data are sent synchronously regardless of the Timeout value. # KeepAlive Property ([MLLPServer](#mllpserver-component) Component) When True, * KEEPALIVE * packets are enabled (for long connections). ## Syntax ```text public bool KeepAlive { get; set; } ``` ## Default Value False ## Remarks This property enables the SO_KEEPALIVE option on the incoming connections. This option prevents long connections from timing out in case of inactivity. NOTE: System Transmission Control Protocol (TCP)/IP stack implementations are not required to support SO_KEEPALIVE. This property is shared among incoming connections. When the property is set, the corresponding value is set for incoming connections as they are accepted. Existing connections are not modified. # Listening Property ([MLLPServer](#mllpserver-component) Component) This property indicates whether the component is listening for incoming connections on LocalPort. ## Syntax ```text public bool Listening { get; } ``` ## Default Value False ## Remarks This property indicates whether the component is listening for connections on the port specified by the [LocalPort](#localport-property-mllpserver-component) property. Use the [StartListening](#startlistening-method-mllpserver-component) and [StopListening](#stoplistening-method-mllpserver-component) methods to control whether the component is listening. This property is read-only and not available at design time. # LocalHost Property ([MLLPServer](#mllpserver-component) Component) The name of the local host or user-assigned IP interface through which connections are initiated or accepted. ## Syntax ```text public string LocalHost { get; set; } ``` ## Default Value "" ## Remarks This property contains the name of the local host as obtained by the *gethostname()* system call, or if the user has assigned an IP address, the value of that address. In multihomed hosts (machines with more than one IP interface) setting LocalHost to the IP address of an interface will make the component initiate connections (or accept in the case of server components) only through that interface. It is recommended to provide an IP address rather than a hostname when setting this property to ensure the desired interface is used. If the component is connected, the LocalHost property shows the IP address of the interface through which the connection is made in internet dotted format (aaa.bbb.ccc.ddd). In most cases, this is the address of the local host, except for multihomed hosts (machines with more than one IP interface). NOTE: LocalHost is not persistent. You must always set it in code, and never in the property window. # LocalPort Property ([MLLPServer](#mllpserver-component) Component) This property includes the Transmission Control Protocol (TCP) port in the local host where the component listens. ## Syntax ```text public int LocalPort { get; set; } ``` ## Default Value 0 ## Remarks This property must be set before the component can start listening. If its value is 0, then the TCP/IP subsystem picks a port number at random. The port number can be found by checking the value of this property after the component is listening (i.e., after successfully assigning True to the [Listening](#listening-property-mllpserver-component) property). The service port is not shared among servers so two components cannot be listening on the same port at the same time. # SSLAuthenticateClients Property ([MLLPServer](#mllpserver-component) Component) If set to True, the server asks the client(s) for a certificate. ## Syntax ```text public bool SSLAuthenticateClients { get; set; } ``` ## Default Value False ## Remarks This property is used in conjunction with the [SSLClientAuthentication](#sslclientauthentication-event-mllpserver-component) event. Please refer to the documentation of the [SSLClientAuthentication](#sslclientauthentication-event-mllpserver-component) event for details. # SSLCert Property ([MLLPServer](#mllpserver-component) Component) The certificate to be used during Secure Sockets Layer (SSL) negotiation. ## Syntax ```text public Certificate SSLCert { get; set; } ``` ## Remarks This property includes the digital certificate that the component will use during SSL negotiation. Set this property to a valid certificate before starting SSL negotiation. To set a certificate, you may set the [Encoded](#Certificate_f_Encoded) field to the encoded certificate. To select a certificate, use the store and subject fields. Please refer to the [Certificate](#certificate-type) type for a complete list of fields. # SSLEnabled Property ([MLLPServer](#mllpserver-component) Component) This property indicates whether Transport Layer Security/Secure Sockets Layer (TLS/SSL) is enabled. ## Syntax ```text public bool SSLEnabled { get; set; } ``` ## Default Value False ## Remarks This property specifies whether TLS/SSL is enabled in the component. When False (default), the component operates in plaintext mode. When True, TLS/SSL is enabled. TLS/SSL may also be enabled by setting SSLStartMode. Setting SSLStartMode will automatically update this property value. This property is not available at design time. # Version Property ([MLLPServer](#mllpserver-component) Component) The MLLP version to use. ## Syntax ```text public MLLPServerVersions Version { get; set; } enum MLLPServerVersions { mvVersion1, mvVersion2 } ``` ## Default Value 2 ## Remarks This property specifies the MLLP version the component should use. Valid values are: - *mvVersion1 (1)* - MLLP Version 1 - *mvVersion2 (2)* - MLLP Version 2 (default) When using MLLP version 1, there are no acknowledgements, so the [AckIn](#ackin-event-mllpserver-component) and [AckOut](#ackout-event-mllpserver-component) events will never fire. This property is not available at design time. # Config Method ([MLLPServer](#mllpserver-component) Component) Sets or retrieves a configuration setting. ## Syntax ```text public string Config(string configurationString); Async Version public async Task Config(string configurationString); public async Task Config(string configurationString, CancellationToken cancellationToken); ``` ## Remarks Config is a generic method available in every component. It is used to set and retrieve [configuration settings](#config-settings-mllpserver-component) for the component. These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the component, access to these *internal properties* is provided through the Config method. To set a configuration setting named *PROPERTY*, you must call *Config("PROPERTY=VALUE")*, where *VALUE* is the value of the setting expressed as a string. For boolean values, use the strings "True", "False", "0", "1", "Yes", or "No" (case does not matter). To read (query) the value of a [configuration setting](#config-settings-mllpserver-component), you must call *Config("PROPERTY")*. The value will be returned as a string. # Disconnect Method ([MLLPServer](#mllpserver-component) Component) This method disconnects the specified client. ## Syntax ```text public void Disconnect(string connectionId); Async Version public async Task Disconnect(string connectionId); public async Task Disconnect(string connectionId, CancellationToken cancellationToken); ``` ## Remarks Calling this method will disconnect the client specified by the *ConnectionId* parameter. # DoEvents Method ([MLLPServer](#mllpserver-component) Component) This method processes events from the internal message queue. ## Syntax ```text public void DoEvents(); Async Version public async Task DoEvents(); public async Task DoEvents(CancellationToken cancellationToken); ``` ## Remarks When DoEvents is called, the component processes any available events. If no events are available, it waits for a preset period of time, and then returns. # Interrupt Method ([MLLPServer](#mllpserver-component) Component) This method interrupts a synchronous send to the remote host. ## Syntax ```text public void Interrupt(string connectionId); Async Version public async Task Interrupt(string connectionId); public async Task Interrupt(string connectionId, CancellationToken cancellationToken); ``` ## Remarks This property is called using the Connection Id if you wish to interrupt a connection and stop a file from uploading without disconnecting the client connected to the component. If you use SendFile to upload a file, the component will run synchronously on that Connection Id until it is completed. # Reset Method ([MLLPServer](#mllpserver-component) Component) This method will reset the component. ## Syntax ```text public void Reset(); Async Version public async Task Reset(); public async Task Reset(CancellationToken cancellationToken); ``` ## Remarks This method will reset the component's properties to their default values. # Send Method ([MLLPServer](#mllpserver-component) Component) Send HL7 data to the MLLP client associated with the specified connection Id. ## Syntax ```text public void Send(string connectionId); Async Version public async Task Send(string connectionId); public async Task Send(string connectionId, CancellationToken cancellationToken); ``` ## Remarks The Send method sends data for the connection specified by *ConnectionId* to the associated MLLP client. Before calling this method, specify the data to send by doing one of the following (the component will use the data from the first valid location): - Set the [InputStream](#MLLPConnection_f_InputStream) field to a stream with HL7 data. - Set the [InputFileName](#MLLPConnection_f_InputFileName) field to the path of a file with HL7 data. - Set the HL7 data directly to the [InputData](#MLLPConnection_f_InputData) field. *ConnectionId* is the connected client to which the server should Send. Once the client has received the data, it will respond with an acknowledgement, causing the component's [AckIn](#ackin-event-mllpserver-component) event to fire. **Sending Data Example** ```text mllpServer.Connections[connectionId].InputData = "HL7Data"; mllpServer.Send(connectionId); ``` # Shutdown Method ([MLLPServer](#mllpserver-component) Component) This method shuts down the server. ## Syntax ```text public void Shutdown(); Async Version public async Task Shutdown(); public async Task Shutdown(CancellationToken cancellationToken); ``` ## Remarks This method shuts down the server. Calling this method is equivalent to calling [StopListening](#stoplistening-method-mllpserver-component) and then breaking every client connection by calling [Disconnect](#disconnect-method-mllpserver-component). # StartListening Method ([MLLPServer](#mllpserver-component) Component) This method starts listening for incoming connections. ## Syntax ```text public void StartListening(); Async Version public async Task StartListening(); public async Task StartListening(CancellationToken cancellationToken); ``` ## Remarks This method begins listening for incoming connections on the port specified by [LocalPort](#localport-property-mllpserver-component). Once listening, events will fire as new clients connect and data are transferred. To stop listening for new connections, call [StopListening](#stoplistening-method-mllpserver-component). To stop listening for new connections and to disconnect all existing clients, call [Shutdown](#shutdown-method-mllpserver-component). # StopListening Method ([MLLPServer](#mllpserver-component) Component) This method stops listening for new connections. ## Syntax ```text public void StopListening(); Async Version public async Task StopListening(); public async Task StopListening(CancellationToken cancellationToken); ``` ## Remarks This method stops listening for new connections. After being called, any new connection attempts will be rejected. Calling this method does not disconnect existing connections. To stop listening and to disconnect all existing clients, call [Shutdown](#shutdown-method-mllpserver-component) instead. # AckIn Event ([MLLPServer](#mllpserver-component) Component) Fires immediately after receiving an acknowledgement from a client. ## Syntax ```text public event OnAckInHandler OnAckIn; public delegate void OnAckInHandler(object sender, MLLPServerAckInEventArgs e); public class MLLPServerAckInEventArgs : EventArgs { public string ConnectionId { get; } public bool Accepted { get; } } ``` ## Remarks This event fires immediately after receiving an acknowledgement (positive or negative) from an MLLP client. The *ConnectionId* parameter reflects the Id of the connection that the acknowledgement was received on. The *Accepted* parameter reflects whether the acknowledgement is positive (ACK - *True*) or negative (NAK - *False*). Anytime a negative acknowledgement is received, the component will report an error with code 670. # AckOut Event ([MLLPServer](#mllpserver-component) Component) Fires immediately before sending an acknowledgement to a client. ## Syntax ```text public event OnAckOutHandler OnAckOut; public delegate void OnAckOutHandler(object sender, MLLPServerAckOutEventArgs e); public class MLLPServerAckOutEventArgs : EventArgs { public string ConnectionId { get; } public bool Accept { get; set; } } ``` ## Remarks This event fires immediately before the component sends an acknowledgement to an MLLP client. *ConnectionId* is the Id of the connection that will receive the acknowledgement. The *Accept* parameter should be set to indicate whether the component should send a positive (ACK - *True*) or negative (NAK - *False*) acknowledgement. The default is *True*. # Connected Event ([MLLPServer](#mllpserver-component) Component) This event is fired immediately after a connection completes (or fails). ## Syntax ```text public event OnConnectedHandler OnConnected; public delegate void OnConnectedHandler(object sender, MLLPServerConnectedEventArgs e); public class MLLPServerConnectedEventArgs : EventArgs { public string ConnectionId { get; } public int StatusCode { get; } public string Description { get; } } ``` ## Remarks If the connection is made normally, *StatusCode* is 0, and *Description* is "OK". If the connection fails, *StatusCode* has the error code returned by the system. *Description* contains a description of this code. The value of *StatusCode* is equal to the value of the system error. Please refer to the [Error Codes](#trappable-errors-mllpserver-component) section for more information. # ConnectionRequest Event ([MLLPServer](#mllpserver-component) Component) This event is fired when a request for connection comes from a remote host. ## Syntax ```text public event OnConnectionRequestHandler OnConnectionRequest; public delegate void OnConnectionRequestHandler(object sender, MLLPServerConnectionRequestEventArgs e); public class MLLPServerConnectionRequestEventArgs : EventArgs { public string Address { get; } public int Port { get; } public bool Accept { get; set; } } ``` ## Remarks This event indicates an incoming connection. The connection is accepted by default. *Address* and *Port* will contain information about the remote host requesting the inbound connection. If you want to refuse it, you can set the *Accept* parameter to False. # Disconnected Event ([MLLPServer](#mllpserver-component) Component) This event is fired when a connection is closed. ## Syntax ```text public event OnDisconnectedHandler OnDisconnected; public delegate void OnDisconnectedHandler(object sender, MLLPServerDisconnectedEventArgs e); public class MLLPServerDisconnectedEventArgs : EventArgs { public string ConnectionId { get; } public int StatusCode { get; } public string Description { get; } } ``` ## Remarks If the connection is broken normally, *StatusCode* is 0, and *Description* is "OK". If the connection is broken for any other reason, *StatusCode* has the error code returned by the system. *Description* contains a description of this code. The value of *StatusCode* is equal to the value of the system error. Please refer to the [Error Codes](#trappable-errors-mllpserver-component) section for more information. # EndTransfer Event ([MLLPServer](#mllpserver-component) Component) Fires after incoming HL7 data finishes transferring. ## Syntax ```text public event OnEndTransferHandler OnEndTransfer; public delegate void OnEndTransferHandler(object sender, MLLPServerEndTransferEventArgs e); public class MLLPServerEndTransferEventArgs : EventArgs { public string ConnectionId { get; } } ``` ## Remarks This event fires after incoming HL7 data finishes transferring, immediately before the [AckOut](#ackout-event-mllpserver-component) event is fired. *ConnectionId* is the Id of the connection on which the data was received. # Error Event ([MLLPServer](#mllpserver-component) Component) This event fires information about errors during data delivery. ## Syntax ```text public event OnErrorHandler OnError; public delegate void OnErrorHandler(object sender, MLLPServerErrorEventArgs e); public class MLLPServerErrorEventArgs : EventArgs { public string ConnectionId { get; } public int ErrorCode { get; } public string Description { get; } } ``` ## Remarks The Error event is fired in case of exceptional conditions during message processing. Normally, the component throws an exception. *ErrorCode* contains an error code and *Description* contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to the [Error Codes](#trappable-errors-mllpserver-component) section. *ConnectionId* indicates the connection for which the error is applicable. # Log Event ([MLLPServer](#mllpserver-component) Component) Provides logging information. ## Syntax ```text public event OnLogHandler OnLog; public delegate void OnLogHandler(object sender, MLLPServerLogEventArgs e); public class MLLPServerLogEventArgs : EventArgs { public string ConnectionId { get; } public int LogLevel { get; } public string Message { get; } public string LogType { get; } } ``` ## Remarks This event fires when processing messages and provides logging information. The [LogLevel](#LogLevel) configuration setting specifies the level of detail that is logged. *ConnectionId* reflects the Id of the connection to which the log message pertains. *LogType* specifies the type of log message. Possible values are: - INFO - VERBOSE - DEBUG *LogMessage* is the log message. # SSLClientAuthentication Event ([MLLPServer](#mllpserver-component) Component) This event is fired when the client presents its credentials to the server. ## Syntax ```text public event OnSSLClientAuthenticationHandler OnSSLClientAuthentication; public delegate void OnSSLClientAuthenticationHandler(object sender, MLLPServerSSLClientAuthenticationEventArgs e); public class MLLPServerSSLClientAuthenticationEventArgs : EventArgs { public string ConnectionId { get; } public string CertEncoded { get; } public byte[] CertEncodedB { get; } public string CertSubject { get; } public string CertIssuer { get; } public string Status { get; } public bool Accept { get; set; } } ``` ## Remarks This event enables the server to decide whether or not to continue. The *Accept* parameter is a recommendation on whether to continue or to close the connection. This is just a suggestion: application software must use its own logic to determine whether or not to continue. When *Accept* is False, *Status* shows why the verification failed (otherwise, *Status* contains the string "OK"). # SSLConnectionRequest Event ([MLLPServer](#mllpserver-component) Component) This event fires when a Secure Sockets Layer (SSL) connection is requested. ## Syntax ```text public event OnSSLConnectionRequestHandler OnSSLConnectionRequest; public delegate void OnSSLConnectionRequestHandler(object sender, MLLPServerSSLConnectionRequestEventArgs e); public class MLLPServerSSLConnectionRequestEventArgs : EventArgs { public string ConnectionId { get; } public string SupportedCipherSuites { get; } public string SupportedSignatureAlgs { get; } public int CertStoreType { get; set; } public string CertStore { get; set; } public string CertPassword { get; set; } public string CertSubject { get; set; } } ``` ## Remarks This event fires when an SSL connection is requested and SSLProvider is set to *Internal*. This event provides an opportunity to select an alternative certificate to the connecting client. This event does not fire when SSLProvider is set to *Platform*. This event allows the component to be configured to use both RSA and ECDSA certificates depending on the connecting client's capabilities. *ConnectionId* is the connection Id of the client requesting the connection. *SupportedCipherSuites* is a comma-separated list of cipher suites that the client supports. *SupportedSignatureAlgs* is a comma-separated list of certificate signature algorithms that the client supports. *CertStoreType* is the store type of the alternate certificate to use for this connection. The component supports both public and private keys in a variety of formats. When the *cstAuto* value is used, the component will automatically determine the type. This field can take one of the following values: ```csharp sftp.SSHCert = new Certificate(CertStoreTypes.cstPKCS11, @"C:\Program Files\OpenSC Project\OpenSC\pkcs11\opensc-pkcs11.dll", "123456", // PIN "CN=cert_subject"); sftp.SSHUser = "test"; sftp.SSHLogon("myhost", 22); ``` ```csharp certmgr.CertStoreType = CertStoreTypes.cstPKCS11; certmgr.OnCertList += (s, e) => { secKeyBlob = e.CertEncoded; }; certmgr.CertStore = @"C:\Program Files\OpenSC Project\OpenSC\pkcs11\opensc-pkcs11.dll"; certmgr.CertStorePassword = "123456"; // PIN certmgr.ListStoreCertificates(); sftp.SSHCert = new Certificate(CertStoreTypes.cstPKCS11, secKeyBlob, "123456", "*"); sftp.SSHUser = "test"; sftp.SSHLogon("myhost", 22); ``` | | | | --- | --- | | 0 (cstUser - default) | For Windows, this specifies that the certificate store is a certificate store owned by the current user. NOTE: This store type is not available in Java. | | 1 (cstMachine) | For Windows, this specifies that the certificate store is a machine store. NOTE: This store type is not available in Java. | | 2 (cstPFXFile) | The certificate store is the name of a PFX (PKCS#12) file containing certificates. | | 3 (cstPFXBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in PFX (PKCS#12) format. | | 4 (cstJKSFile) | The certificate store is the name of a Java Key Store (JKS) file containing certificates. NOTE: This store type is only available in Java. | | 5 (cstJKSBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in Java Key Store (JKS) format. NOTE: This store type is only available in Java. | | 6 (cstPEMKeyFile) | The certificate store is the name of a PEM-encoded file that contains a private key and an optional certificate. | | 7 (cstPEMKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains a private key and an optional certificate. | | 8 (cstPublicKeyFile) | The certificate store is the name of a file that contains a PEM- or DER-encoded public key certificate. | | 9 (cstPublicKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains a PEM- or DER-encoded public key certificate. | | 10 (cstSSHPublicKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains an SSH-style public key. | | 11 (cstP7BFile) | The certificate store is the name of a PKCS#7 file containing certificates. | | 12 (cstP7BBlob) | The certificate store is a string (binary) representing a certificate store in PKCS#7 format. | | 13 (cstSSHPublicKeyFile) | The certificate store is the name of a file that contains an SSH-style public key. | | 14 (cstPPKFile) | The certificate store is the name of a file that contains a PPK (PuTTY Private Key). | | 15 (cstPPKBlob) | The certificate store is a string (binary) that contains a PPK (PuTTY Private Key). | | 16 (cstXMLFile) | The certificate store is the name of a file that contains a certificate in XML format. | | 17 (cstXMLBlob) | The certificate store is a string that contains a certificate in XML format. | | 18 (cstJWKFile) | The certificate store is the name of a file that contains a JWK (JSON Web Key). | | 19 (cstJWKBlob) | The certificate store is a string that contains a JWK (JSON Web Key). | | 21 (cstBCFKSFile) | The certificate store is the name of a file that contains a BCFKS (Bouncy Castle FIPS Key Store). NOTE: This store type is only available in Java and .NET. | | 22 (cstBCFKSBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in BCFKS (Bouncy Castle FIPS Key Store) format. NOTE: This store type is only available in Java and .NET. | | 23 (cstPKCS11) | The certificate is present on a physical security key accessible via a PKCS#11 interface. To use a security key, create a new [Certificate](#certificate-type) object and pass cstPKCS11 as the [StoreType](#Certificate_f_StoreType), the full path of the PKCS#11 DLL as the [Store](#Certificate_f_Store), and the PIN as the [StorePassword](#Certificate_f_StorePassword). Code Example. SSH Authentication with Security Key (without CertMgr): Alternatively, collect the necessary data using the [CertMgr](CertMgr.md#CertMgr) component by calling the [ListStoreCertificates](CertMgr.md#CertMgr_m_ListStoreCertificates) method after setting the corresponding properties accordingly. The certificate information returned in the [CertList](CertMgr.md#CertMgr_e_CertList) event's CertEncoded parameter may be saved for later use. When using a certificate obtained with this approach, pass the previously saved security key information as the [Store](#Certificate_f_Store) and set [StorePassword](#Certificate_f_StorePassword) to the PIN. Code Example. SSH Authentication with Security Key (with CertMgr): | | 99 (cstAuto) | The store type is automatically detected from the input data. This setting may be used with both public and private keys and can detect any of the supported formats automatically. | *CertStore* is the store name or location of the alternate certificate to use for this connection. Designations of certificate stores are platform dependent. The following designations are the most common User and Machine certificate stores in Windows: | | | | --- | --- | | MY | A certificate store holding personal certificates with their associated private keys. | | CA | Certifying authority certificates. | | ROOT | Root certificates. | When the certificate store type is *cstPFXFile*, this property must be set to the name of the file. When the type is *cstPFXBlob*, the property must be set to the binary contents of a PFX file (i.e., PKCS#12 certificate store). *CertPassword* is the password of the certificate store containing the alternate certificate to use for this connection. *CertSubject* is the subject of the alternate certificate to use for this connection. The special value *** matches any subject and will select the first certificate in the store. The certificate subject is a comma-separated list of distinguished name fields and values. For instance, "CN=www.server.com, OU=test, C=US, E=example@email.com". Common fields and their meanings are as follows: | Field | Meaning | | --- | --- | | CN | Common Name. This is commonly a hostname like www.server.com. | | O | Organization | | OU | Organizational Unit | | L | Locality | | S | State | | C | Country | | E | Email Address | If a field value contains a comma, it must be quoted. # SSLStatus Event ([MLLPServer](#mllpserver-component) Component) This event is fired to show the progress of the secure connection. ## Syntax ```text public event OnSSLStatusHandler OnSSLStatus; public delegate void OnSSLStatusHandler(object sender, MLLPServerSSLStatusEventArgs e); public class MLLPServerSSLStatusEventArgs : EventArgs { public string ConnectionId { get; } public string Message { get; } } ``` ## Remarks The event is fired for informational and logging purposes only. It is used to track the progress of the connection. # StartTransfer Event ([MLLPServer](#mllpserver-component) Component) Fires before incoming HL7 data begins transferring. ## Syntax ```text public event OnStartTransferHandler OnStartTransfer; public delegate void OnStartTransferHandler(object sender, MLLPServerStartTransferEventArgs e); public class MLLPServerStartTransferEventArgs : EventArgs { public string ConnectionId { get; } } ``` ## Remarks This event fires before incoming HL7 data begins transferring. *ConnectionId* is the Id of the connection on which data is being received. # Transfer Event ([MLLPServer](#mllpserver-component) Component) Fires during incoming data transfer. ## Syntax ```text public event OnTransferHandler OnTransfer; public delegate void OnTransferHandler(object sender, MLLPServerTransferEventArgs e); public class MLLPServerTransferEventArgs : EventArgs { public string ConnectionId { get; } public long BytesTransferred { get; } public string data { get; } public byte[] dataB { get; } } ``` ## Remarks This event fires one or more times while incoming data is being transferred. The *ConnectionId* parameter is the Id of the connection on which data is being transferred. The *BytesTransferred* parameter reflects the number of bytes transferred since the beginning of the transfer. The *Data* parameter contains the portion of the data being delivered currently. # Certificate Type This is the digital certificate being used. ## Remarks This type describes the current digital certificate. The certificate may be a public or private key. The fields are used to identify or select certificates. The following fields are available: - [EffectiveDate](#Certificate_f_EffectiveDate) - [ExpirationDate](#Certificate_f_ExpirationDate) - [ExtendedKeyUsage](#Certificate_f_ExtendedKeyUsage) - [Fingerprint](#Certificate_f_Fingerprint) - [FingerprintSHA1](#Certificate_f_FingerprintSHA1) - [FingerprintSHA256](#Certificate_f_FingerprintSHA256) - [Issuer](#Certificate_f_Issuer) - [PrivateKey](#Certificate_f_PrivateKey) - [PrivateKeyAvailable](#Certificate_f_PrivateKeyAvailable) - [PrivateKeyContainer](#Certificate_f_PrivateKeyContainer) - [PublicKey](#Certificate_f_PublicKey) - [PublicKeyAlgorithm](#Certificate_f_PublicKeyAlgorithm) - [PublicKeyLength](#Certificate_f_PublicKeyLength) - [SerialNumber](#Certificate_f_SerialNumber) - [SignatureAlgorithm](#Certificate_f_SignatureAlgorithm) - [Store](#Certificate_f_Store) - [StorePassword](#Certificate_f_StorePassword) - [StoreType](#Certificate_f_StoreType) - [SubjectAltNames](#Certificate_f_SubjectAltNames) - [ThumbprintMD5](#Certificate_f_ThumbprintMD5) - [ThumbprintSHA1](#Certificate_f_ThumbprintSHA1) - [ThumbprintSHA256](#Certificate_f_ThumbprintSHA256) - [Usage](#Certificate_f_Usage) - [UsageFlags](#Certificate_f_UsageFlags) - [Version](#Certificate_f_Version) - [Subject](#Certificate_f_Subject) - [Encoded](#Certificate_f_Encoded) ## Fields **EffectiveDate** *string (read-only)* Default: "" The date on which this certificate becomes valid. Before this date, it is not valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date: 23-Jan-2000 15:00:00. **ExpirationDate** *string (read-only)* Default: "" The date on which the certificate expires. After this date, the certificate will no longer be valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date: 23-Jan-2001 15:00:00. **ExtendedKeyUsage** *string (read-only)* Default: "" A comma-delimited list of extended key usage identifiers. These are the same as ASN.1 object identifiers (OIDs). **Fingerprint** *string (read-only)* Default: "" The hex-encoded, 16-byte MD5 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys. The following example illustrates the format: *bc:2a:72:af:fe:58:17:43:7a:5f:ba:5a:7c:90:f7:02* **FingerprintSHA1** *string (read-only)* Default: "" The hex-encoded, 20-byte SHA-1 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys. The following example illustrates the format: *30:7b:fa:38:65:83:ff:da:b4:4e:07:3f:17:b8:a4:ed:80:be:ff:84* **FingerprintSHA256** *string (read-only)* Default: "" The hex-encoded, 32-byte SHA-256 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys. The following example illustrates the format: *6a:80:5c:33:a9:43:ea:b0:96:12:8a:64:96:30:ef:4a:8a:96:86:ce:f4:c7:be:10:24:8e:2b:60:9e:f3:59:53* **Issuer** *string (read-only)* Default: "" The issuer of the certificate. This field contains a string representation of the name of the issuing authority for the certificate. **PrivateKey** *string (read-only)* Default: "" The private key of the certificate (if available). The key is provided as PEM/Base64-encoded data. NOTE: The [PrivateKey](#Certificate_f_PrivateKey) may be available but not exportable. In this case, [PrivateKey](#Certificate_f_PrivateKey) returns an empty string. **PrivateKeyAvailable** *bool (read-only)* Default: False Whether a [PrivateKey](#Certificate_f_PrivateKey) is available for the selected certificate. If [PrivateKeyAvailable](#Certificate_f_PrivateKeyAvailable) is True, the certificate may be used for authentication purposes (e.g., server authentication). **PrivateKeyContainer** *string (read-only)* Default: "" The name of the [PrivateKey](#Certificate_f_PrivateKey) container for the certificate (if available). This functionality is available only on Windows platforms. **PublicKey** *string (read-only)* Default: "" The public key of the certificate. The key is provided as PEM/Base64-encoded data. **PublicKeyAlgorithm** *string (read-only)* Default: "" The textual description of the certificate's public key algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_DH") or an object identifier (OID) string representing the algorithm. **PublicKeyLength** *int (read-only)* Default: 0 The length of the certificate's public key (in bits). Common values are 512, 1024, and 2048. **SerialNumber** *string (read-only)* Default: "" The serial number of the certificate encoded as a string. The number is encoded as a series of hexadecimal digits, with each pair representing a byte of the serial number. **SignatureAlgorithm** *string (read-only)* Default: "" The text description of the certificate's signature algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_MD5RSA") or an object identifier (OID) string representing the algorithm. **Store** *string* Default: "MY" The name of the certificate store for the client certificate. The [StoreType](#Certificate_f_StoreType) field denotes the type of the certificate store specified by [Store](#Certificate_f_Store). If the store is password-protected, specify the password in [StorePassword](#Certificate_f_StorePassword). [Store](#Certificate_f_Store) is used in conjunction with the [Subject](#Certificate_f_Subject) field to specify client certificates. If [Store](#Certificate_f_Store) has a value, and [Subject](#Certificate_f_Subject) or [Encoded](#Certificate_f_Encoded) is set, a search for a certificate is initiated. Please see the [Subject](#Certificate_f_Subject) field for details. Designations of certificate stores are platform dependent. The following designations are the most common User and Machine certificate stores in Windows: | | | | --- | --- | | MY | A certificate store holding personal certificates with their associated private keys. | | CA | Certifying authority certificates. | | ROOT | Root certificates. | When the certificate store type is *cstPFXFile*, this property must be set to the name of the file. When the type is *cstPFXBlob*, the property must be set to the binary contents of a PFX file (i.e., PKCS#12 certificate store). **StoreB** *byte []* Default: "MY" The name of the certificate store for the client certificate. The [StoreType](#Certificate_f_StoreType) field denotes the type of the certificate store specified by [Store](#Certificate_f_Store). If the store is password-protected, specify the password in [StorePassword](#Certificate_f_StorePassword). [Store](#Certificate_f_Store) is used in conjunction with the [Subject](#Certificate_f_Subject) field to specify client certificates. If [Store](#Certificate_f_Store) has a value, and [Subject](#Certificate_f_Subject) or [Encoded](#Certificate_f_Encoded) is set, a search for a certificate is initiated. Please see the [Subject](#Certificate_f_Subject) field for details. Designations of certificate stores are platform dependent. The following designations are the most common User and Machine certificate stores in Windows: | | | | --- | --- | | MY | A certificate store holding personal certificates with their associated private keys. | | CA | Certifying authority certificates. | | ROOT | Root certificates. | When the certificate store type is *cstPFXFile*, this property must be set to the name of the file. When the type is *cstPFXBlob*, the property must be set to the binary contents of a PFX file (i.e., PKCS#12 certificate store). **StorePassword** *string* Default: "" If the type of certificate store requires a password, this field is used to specify the password needed to open the certificate store. **StoreType** *CertStoreTypes* Default: 0 The type of certificate store for this certificate. The component supports both public and private keys in a variety of formats. When the *cstAuto* value is used, the component will automatically determine the type. This field can take one of the following values: ```csharp sftp.SSHCert = new Certificate(CertStoreTypes.cstPKCS11, @"C:\Program Files\OpenSC Project\OpenSC\pkcs11\opensc-pkcs11.dll", "123456", // PIN "CN=cert_subject"); sftp.SSHUser = "test"; sftp.SSHLogon("myhost", 22); ``` ```csharp certmgr.CertStoreType = CertStoreTypes.cstPKCS11; certmgr.OnCertList += (s, e) => { secKeyBlob = e.CertEncoded; }; certmgr.CertStore = @"C:\Program Files\OpenSC Project\OpenSC\pkcs11\opensc-pkcs11.dll"; certmgr.CertStorePassword = "123456"; // PIN certmgr.ListStoreCertificates(); sftp.SSHCert = new Certificate(CertStoreTypes.cstPKCS11, secKeyBlob, "123456", "*"); sftp.SSHUser = "test"; sftp.SSHLogon("myhost", 22); ``` | | | | --- | --- | | 0 (cstUser - default) | For Windows, this specifies that the certificate store is a certificate store owned by the current user. NOTE: This store type is not available in Java. | | 1 (cstMachine) | For Windows, this specifies that the certificate store is a machine store. NOTE: This store type is not available in Java. | | 2 (cstPFXFile) | The certificate store is the name of a PFX (PKCS#12) file containing certificates. | | 3 (cstPFXBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in PFX (PKCS#12) format. | | 4 (cstJKSFile) | The certificate store is the name of a Java Key Store (JKS) file containing certificates. NOTE: This store type is only available in Java. | | 5 (cstJKSBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in Java Key Store (JKS) format. NOTE: This store type is only available in Java. | | 6 (cstPEMKeyFile) | The certificate store is the name of a PEM-encoded file that contains a private key and an optional certificate. | | 7 (cstPEMKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains a private key and an optional certificate. | | 8 (cstPublicKeyFile) | The certificate store is the name of a file that contains a PEM- or DER-encoded public key certificate. | | 9 (cstPublicKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains a PEM- or DER-encoded public key certificate. | | 10 (cstSSHPublicKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains an SSH-style public key. | | 11 (cstP7BFile) | The certificate store is the name of a PKCS#7 file containing certificates. | | 12 (cstP7BBlob) | The certificate store is a string (binary) representing a certificate store in PKCS#7 format. | | 13 (cstSSHPublicKeyFile) | The certificate store is the name of a file that contains an SSH-style public key. | | 14 (cstPPKFile) | The certificate store is the name of a file that contains a PPK (PuTTY Private Key). | | 15 (cstPPKBlob) | The certificate store is a string (binary) that contains a PPK (PuTTY Private Key). | | 16 (cstXMLFile) | The certificate store is the name of a file that contains a certificate in XML format. | | 17 (cstXMLBlob) | The certificate store is a string that contains a certificate in XML format. | | 18 (cstJWKFile) | The certificate store is the name of a file that contains a JWK (JSON Web Key). | | 19 (cstJWKBlob) | The certificate store is a string that contains a JWK (JSON Web Key). | | 21 (cstBCFKSFile) | The certificate store is the name of a file that contains a BCFKS (Bouncy Castle FIPS Key Store). NOTE: This store type is only available in Java and .NET. | | 22 (cstBCFKSBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in BCFKS (Bouncy Castle FIPS Key Store) format. NOTE: This store type is only available in Java and .NET. | | 23 (cstPKCS11) | The certificate is present on a physical security key accessible via a PKCS#11 interface. To use a security key, create a new [Certificate](#certificate-type) object and pass cstPKCS11 as the [StoreType](#Certificate_f_StoreType), the full path of the PKCS#11 DLL as the [Store](#Certificate_f_Store), and the PIN as the [StorePassword](#Certificate_f_StorePassword). Code Example. SSH Authentication with Security Key (without CertMgr): Alternatively, collect the necessary data using the [CertMgr](CertMgr.md#CertMgr) component by calling the [ListStoreCertificates](CertMgr.md#CertMgr_m_ListStoreCertificates) method after setting the corresponding properties accordingly. The certificate information returned in the [CertList](CertMgr.md#CertMgr_e_CertList) event's CertEncoded parameter may be saved for later use. When using a certificate obtained with this approach, pass the previously saved security key information as the [Store](#Certificate_f_Store) and set [StorePassword](#Certificate_f_StorePassword) to the PIN. Code Example. SSH Authentication with Security Key (with CertMgr): | | 99 (cstAuto) | The store type is automatically detected from the input data. This setting may be used with both public and private keys and can detect any of the supported formats automatically. | **SubjectAltNames** *string (read-only)* Default: "" Comma-separated lists of alternative subject names for the certificate. **ThumbprintMD5** *string (read-only)* Default: "" The MD5 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed. **ThumbprintSHA1** *string (read-only)* Default: "" The SHA-1 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed. **ThumbprintSHA256** *string (read-only)* Default: "" The SHA-256 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed. **Usage** *string (read-only)* Default: "" The text description of [UsageFlags](#Certificate_f_UsageFlags). This value will be one or more of the following strings and will be separated by commas: - Digital Signature - Non-Repudiation - Key Encipherment - Data Encipherment - Key Agreement - Certificate Signing - CRL Signing - Encipher Only If the provider is OpenSSL, the value is a comma-separated list of X.509 certificate extension names. **UsageFlags** *int (read-only)* Default: 0 The flags that show intended use for the certificate. The value of [UsageFlags](#Certificate_f_UsageFlags) is a combination of the following flags: | | | | --- | --- | | 0x80 | Digital Signature | | 0x40 | Non-Repudiation | | 0x20 | Key Encipherment | | 0x10 | Data Encipherment | | 0x08 | Key Agreement | | 0x04 | Certificate Signing | | 0x02 | CRL Signing | | 0x01 | Encipher Only | Please see the [Usage](#Certificate_f_Usage) field for a text representation of [UsageFlags](#Certificate_f_UsageFlags). This functionality currently is not available when the provider is OpenSSL. **Version** *string (read-only)* Default: "" The certificate's version number. The possible values are the strings "V1", "V2", and "V3". **Subject** *string* Default: "" The subject of the certificate used for client authentication. This field will be populated with the full subject of the loaded certificate. When loading a certificate, the subject is used to locate the certificate in the store. If an exact match is not found, the store is searched for subjects containing the value of the property. If a match is still not found, the property is set to an empty string, and no certificate is selected. The special value "*" picks a random certificate in the certificate store. The certificate subject is a comma-separated list of distinguished name fields and values. For instance, "CN=www.server.com, OU=test, C=US, E=example@email.com". Common fields and their meanings are as follows: | Field | Meaning | | --- | --- | | CN | Common Name. This is commonly a hostname like www.server.com. | | O | Organization | | OU | Organizational Unit | | L | Locality | | S | State | | C | Country | | E | Email Address | If a field value contains a comma, it must be quoted. **Encoded** *string* Default: "" The certificate (PEM/Base64 encoded). This field is used to assign a specific certificate. The [Store](#Certificate_f_Store) and [Subject](#Certificate_f_Subject) fields also may be used to specify a certificate. When [Encoded](#Certificate_f_Encoded) is set, a search is initiated in the current [Store](#Certificate_f_Store) for the private key of the certificate. If the key is found, [Subject](#Certificate_f_Subject) is updated to reflect the full subject of the selected certificate; otherwise, [Subject](#Certificate_f_Subject) is set to an empty string. **EncodedB** *byte []* Default: "" The certificate (PEM/Base64 encoded). This field is used to assign a specific certificate. The [Store](#Certificate_f_Store) and [Subject](#Certificate_f_Subject) fields also may be used to specify a certificate. When [Encoded](#Certificate_f_Encoded) is set, a search is initiated in the current [Store](#Certificate_f_Store) for the private key of the certificate. If the key is found, [Subject](#Certificate_f_Subject) is updated to reflect the full subject of the selected certificate; otherwise, [Subject](#Certificate_f_Subject) is set to an empty string. ## Constructors ```text public Certificate(); ``` Creates a instance whose properties can be set. ```text public Certificate(string certificateFile); ``` Opens * CertificateFile * and reads out the contents as an X.509 public key. ```text public Certificate(byte[] encoded); ``` Parses * Encoded * as an X.509 public key. ```text public Certificate(CertStoreTypes storeType, string store, string storePassword, string subject); ``` * StoreType * identifies the type of certificate store to use. See for descriptions of the different certificate stores. * Store * is a file containing the certificate store. * StorePassword * is the password used to protect the store. After the store has been successfully opened, the component will attempt to find the certificate identified by * Subject * . This can be either a complete or a substring match of the X.509 certificate's subject Distinguished Name (DN). The * Subject * parameter can also take an MD5, SHA-1, or SHA-256 thumbprint of the certificate to load in a "Thumbprint=value" format. ```text public Certificate(CertStoreTypes storeType, string store, string storePassword, string subject, string configurationString); ``` * StoreType * identifies the type of certificate store to use. See for descriptions of the different certificate stores. * Store * is a file containing the certificate store. * StorePassword * is the password used to protect the store. * ConfigurationString * is a newline-separated list of name-value pairs that may be used to modify the default behavior. Possible values include "PersistPFXKey", which shows whether or not the PFX key is persisted after performing operations with the private key. This correlates to the PKCS12_NO_PERSIST_KEY CryptoAPI option. The default value is True (the key is persisted). "Thumbprint" - an MD5, SHA-1, or SHA-256 thumbprint of the certificate to load. When specified, this value is used to select the certificate in the store. This is applicable to the * cstUser * , * cstMachine * , * cstPublicKeyFile * , and * cstPFXFile * store types. "UseInternalSecurityAPI" shows whether the platform (default) or the internal security API is used when performing certificate-related operations. After the store has been successfully opened, the component will attempt to find the certificate identified by * Subject * . This can be either a complete or a substring match of the X.509 certificate's subject Distinguished Name (DN). The * Subject * parameter can also take an MD5, SHA-1, or SHA-256 thumbprint of the certificate to load in a "Thumbprint=value" format. ```text public Certificate(CertStoreTypes storeType, string store, string storePassword, byte[] encoded); ``` * StoreType * identifies the type of certificate store to use. See for descriptions of the different certificate stores. * Store * is a file containing the certificate store. * StorePassword * is the password used to protect the store. After the store has been successfully opened, the component will load * Encoded * as an X.509 certificate and search the opened store for a corresponding private key. ```text public Certificate(CertStoreTypes storeType, byte[] store, string storePassword, string subject); ``` * StoreType * identifies the type of certificate store to use. See for descriptions of the different certificate stores. * Store * is a byte array containing the certificate data. * StorePassword * is the password used to protect the store. After the store has been successfully opened, the component will attempt to find the certificate identified by * Subject * . This can be either a complete or a substring match of the X.509 certificate's subject Distinguished Name (DN). The * Subject * parameter can also take an MD5, SHA-1, or SHA-256 thumbprint of the certificate to load in a "Thumbprint=value" format. ```text public Certificate(CertStoreTypes storeType, byte[] store, string storePassword, string subject, string configurationString); ``` * StoreType * identifies the type of certificate store to use. See for descriptions of the different certificate stores. * Store * is a byte array containing the certificate data. * StorePassword * is the password used to protect the store. After the store has been successfully opened, the component will attempt to find the certificate identified by * Subject * . This can be either a complete or a substring match of the X.509 certificate's subject Distinguished Name (DN). The * Subject * parameter can also take an MD5, SHA-1, or SHA-256 thumbprint of the certificate to load in a "Thumbprint=value" format. ```text public Certificate(CertStoreTypes storeType, byte[] store, string storePassword, byte[] encoded); ``` * StoreType * identifies the type of certificate store to use. See for descriptions of the different certificate stores. * Store * is a byte array containing the certificate data. * StorePassword * is the password used to protect the store. After the store has been successfully opened, the component will load * Encoded * as an X.509 certificate and search the opened store for a corresponding private key. # MLLPConnection Type An MLLP client connection. ## Remarks This type represents an MLLP client connection. The following fields are available: - [Connected](#MLLPConnection_f_Connected) - [ConnectionId](#MLLPConnection_f_ConnectionId) - [InputData](#MLLPConnection_f_InputData) - [InputFileName](#MLLPConnection_f_InputFileName) - [InputStream](#MLLPConnection_f_InputStream) - [LocalAddress](#MLLPConnection_f_LocalAddress) - [OutputData](#MLLPConnection_f_OutputData) - [OutputFileName](#MLLPConnection_f_OutputFileName) - [OutputStream](#MLLPConnection_f_OutputStream) - [RemoteHost](#MLLPConnection_f_RemoteHost) - [RemotePort](#MLLPConnection_f_RemotePort) - [Timeout](#MLLPConnection_f_Timeout) ## Fields **Connected** *bool (read-only)* Default: False Triggers a connection or disconnection. This field triggers a connection or disconnection. Setting this field to *True* initiates a connection attempt to the host specified by the [RemoteHost](#MLLPConnection_f_RemoteHost) field. If successful, the value of this field changes to *True* and the [Connected](#connected-event-mllpserver-component) event is fired. **ConnectionId** *string (read-only)* Default: "" The Id of the connection. This field contains an identifier generated by the component that uniquely identifies the connection. **InputData** *string* Default: "" The raw HL7 data to send. This field is used to specify the HL7 data to send when the [Send](#send-method-mllpserver-component) method is called. Note that the component checks the following places for input data, in order, when [Send](#send-method-mllpserver-component) is called. Input data is sent from the first place it is found: - A stream specified using the connection's [InputStream](#MLLPConnection_f_InputStream) field. - The contents of a file whose path has been set to the connection's [InputFileName](#MLLPConnection_f_InputFileName) property. - The data set to the connection's [InputData](#MLLPConnection_f_InputData) property. **InputDataB** *byte []* Default: "" The raw HL7 data to send. This field is used to specify the HL7 data to send when the [Send](#send-method-mllpserver-component) method is called. Note that the component checks the following places for input data, in order, when [Send](#send-method-mllpserver-component) is called. Input data is sent from the first place it is found: - A stream specified using the connection's [InputStream](#MLLPConnection_f_InputStream) field. - The contents of a file whose path has been set to the connection's [InputFileName](#MLLPConnection_f_InputFileName) property. - The data set to the connection's [InputData](#MLLPConnection_f_InputData) property. **InputFileName** *string* Default: "" The path of a file containing HL7 data to send. This field is used to specify a path to a file whose contents will be sent when the [Send](#send-method-mllpserver-component) method is called. Note that the component checks the following places for input data, in order, when [Send](#send-method-mllpserver-component) is called. Input data is sent from the first place it is found: - A stream specified using the connection's [InputStream](#MLLPConnection_f_InputStream) field. - The contents of a file whose path has been set to the connection's [InputFileName](#MLLPConnection_f_InputFileName) property. - The data set to the connection's [InputData](#MLLPConnection_f_InputData) property. **InputStream** *System.IO.Stream* Default: "" A stream containing HL7 data to send. This field is used to specify a stream containing HL7 data to send when the [Send](#send-method-mllpserver-component) method is called. Note that the component checks the following places for input data, in order, when [Send](#send-method-mllpserver-component) is called. Input data is sent from the first place it is found: - A stream specified using the connection's [InputStream](#MLLPConnection_f_InputStream) field. - The contents of a file whose path has been set to the connection's [InputFileName](#MLLPConnection_f_InputFileName) property. - The data set to the connection's [InputData](#MLLPConnection_f_InputData) property. **LocalAddress** *string (read-only)* Default: "" The address of the local interface through which the connection is passing. This field reflects the address of the local network interface through which the connection is passing. This information is typically only important for multi-homed devices. **OutputData** *string (read-only)* Default: "" The raw HL7 data received. This field holds the raw HL7 data received from the MLLP client. Note that the component will store output data in one of the following places, choosing the first one that is valid: - A stream specified using the connection's [OutputStream](#MLLPConnection_f_OutputStream) field. - A file whose path has been set to the connection's [OutputFileName](#MLLPConnection_f_OutputFileName) field. - The connection's [OutputData](#MLLPConnection_f_OutputData) field. **OutputDataB** *byte [] (read-only)* Default: "" The raw HL7 data received. This field holds the raw HL7 data received from the MLLP client. Note that the component will store output data in one of the following places, choosing the first one that is valid: - A stream specified using the connection's [OutputStream](#MLLPConnection_f_OutputStream) field. - A file whose path has been set to the connection's [OutputFileName](#MLLPConnection_f_OutputFileName) field. - The connection's [OutputData](#MLLPConnection_f_OutputData) field. **OutputFileName** *string* Default: "" The path of a file in which to store received HL7 data. This field is used to specify a path to a file in which to store HL7 data received from the MLLP client. Note that the component will store output data in one of the following places, choosing the first one that is valid: - A stream specified using the connection's [OutputStream](#MLLPConnection_f_OutputStream) field. - A file whose path has been set to the connection's [OutputFileName](#MLLPConnection_f_OutputFileName) field. - The connection's [OutputData](#MLLPConnection_f_OutputData) field. **OutputStream** *System.IO.Stream* Default: "" A stream to which received HL7 data should be written. This field is used to specify a stream to which HL7 data received from the MLLP client should be written. Note that the component will store output data in one of the following places, choosing the first one that is valid: - A stream specified using the connection's [OutputStream](#MLLPConnection_f_OutputStream) field. - A file whose path has been set to the connection's [OutputFileName](#MLLPConnection_f_OutputFileName) field. - The connection's [OutputData](#MLLPConnection_f_OutputData) field. **RemoteHost** *string (read-only)* Default: "" The address of the MLLP client associated with the connection. This field reflects the address of the MLLP client associated with the connection. **RemotePort** *int (read-only)* Default: 0 The port of the MLLP client associated with the connection. This field reflects the port of the MLLP client associated with the connection. **Timeout** *int* Default: 0 The timeout value, in seconds, for the connection. This field specifies the timeout, in seconds, to use for the connection. If set to 0, all operations return immediately, potentially failing with a *WOULDBLOCK* error if data can't be sent immediately. If set to a positive value, the component will automatically retry each operation that would otherwise result in a *WOULDBLOCK* error for a maximum of Timeout seconds. The component will use DoEvents to enter an efficient wait loop during any potential waiting period, making sure that all system events are processed immediately as they arrive. This ensures that the host application does not freeze and remains responsive. If Timeout expires, and the operation is not yet complete, the component throws an exception. NOTE: By default, all timeouts are *inactivity timeouts*, that is, the timeout period is extended by Timeout seconds when any amount of data is successfully sent or received. The default value is 0 (asynchronous operation). ## Constructors ```text public MLLPConnection(); ``` # Config Settings ([MLLPServer](#mllpserver-component) Component) The component accepts one or more of the following *configuration settings*. Configuration settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the component, access to these *internal properties* is provided through the [Config](#config-method-mllpserver-component) method. ### MLLPServer Config Settings **ACKChar**: The positive acknowledgement character.This setting specifies what value to use as the positive acknowledgement character. This setting's value must be a single byte in hexadecimal format; the default is *0x06* (ACK). **EndBlockChar**: The character that denotes the end of HL7 data.This setting specifies which character should be used to denote the end of HL7 data. This setting's value must be a single byte in hexadecimal format; the default is *0x1C* (File Separator). **EOLChar**: The character that denotes the end of a message block.This setting specifies which character should be used to denote the end of a message block. This setting's value must be a single byte in hexadecimal format; the default is *0x0D* (Carriage Return). **LogLevel**: The level of detail that is logged.This setting controls the level of detail that is logged through the [Log](#log-event-mllpserver-component) event. Possible values are: | | | | --- | --- | | 0 (None) | No events are logged. | | 1 (Info - default) | Informational events are logged. | | 2 (Verbose) | Detailed data is logged. | | 3 (Debug) | Debug data is logged. | **NAKChar**: The negative acknowledgement character.This setting specifies what value to use as the negative acknowledgement character. This setting's value must be a single byte in hexadecimal format; the default is *0x15* (NAK). **ReceiveTimeout**: Maximum number of seconds to wait after receiving a StartBlockChar.This setting specifies the period of time, in seconds, that the component will wait to receive an [EndBlockChar](#EndBlockChar) or [EOLChar](#EOLChar) (after receiving a [StartBlockChar](#StartBlockChar)) before it considers the transmission to have timed out. If the component considers a transmission to have timed out, it will ignore all data received until the next [StartBlockChar](#StartBlockChar) is received. **StartBlockChar**: The character that denotes the beginning of HL7 data.This setting specifies which character should be used to denote the beginning of HL7 data. This setting's value must be a single byte in hexadecimal format; the default is *0x0B* (Vertical Tab). ### TCPClient Config Settings **CloseStreamAfterTransfer**: If true, the component will close the upload or download stream after the transfer.This configuration setting determines whether the input or output stream is closed after the transfer completes. When set to True (default), all streams will be closed after a transfer is completed. To keep streams open after the transfer of data, set this to False. The default value is True. **ConnectionTimeout**: Sets a separate timeout value for establishing a connection.When set, this configuration setting allows you to specify a different timeout value for establishing a connection. Otherwise, the component will use Timeout for establishing a connection and transmitting/receiving data. **EnableFallback**: Whether to try the other addresses the remote host resolves to when a connection attempt fails.When set to True and RemoteHost resolves to more than one address, the component will try the remaining addresses in turn if the connection to the first one fails, and only throws an exception once every address has been tried. The error reported is the one from the last attempt. Use [FallbackTimeout](#FallbackTimeout) to limit the total time spent. NOTE: Only addresses of the same IP version as the first one are tried, this setting does not fall back from IPv6 to IPv4. Selecting between IPv6 and IPv4 is done by [UseIPv6](#UseIPv6) when the host is resolved. This setting must be set before the connection is established. The default value for this setting is False. **FallbackTimeout**: The maximum time in milliseconds to spend on connection attempts when EnableFallback is enabled.This setting limits the total time that the component will spend on all of the connection attempts made when [EnableFallback](#EnableFallback) is enabled. The default value is 0, in which case each attempt uses the operating system's own connection timeout. NOTE: This setting only applies when [EnableFallback](#EnableFallback) is True. It is unrelated to [ConnectionTimeout](#ConnectionTimeout), which is specified in seconds and applies to the Connected operation as a whole. **FirewallAutoDetect**: Tells the component whether or not to automatically detect and use firewall system settings, if available.This configuration setting is provided for use by components that do not directly expose Firewall properties. **FirewallHost**: Name or IP address of firewall (optional).If a [FirewallHost](#FirewallHost) is given, requested connections will be authenticated through the specified firewall when connecting. If the [FirewallHost](#FirewallHost) setting is set to a Domain Name, a DNS request is initiated. Upon successful termination of the request, the [FirewallHost](#FirewallHost) setting is set to the corresponding address. If the search is not successful, an error is returned. NOTE: This setting is provided for use by components that do not directly expose Firewall properties. **FirewallHTTPVersion**: The HTTP version to be used when connecting through a tunneling proxy.When [FirewallType](#FirewallType) is set to a tunneling proxy, this setting dictates which HTTP version is used when connecting. **FirewallListener**: If true, the component binds to a SOCKS firewall as a server (TCPClient only).This entry is for TCPClient only and does not work for other components that descend from TCPClient. If this entry is set, the component acts as a server. RemoteHost and RemotePort are used to tell the SOCKS firewall in which address and port to listen to. The firewall rules may ignore RemoteHost, and it is recommended that RemoteHost be set to empty string in this case. RemotePort is the port in which the firewall will listen to. If set to 0, the firewall will select a random port. The binding (address and port) is provided through the ConnectionStatus event. The connection to the firewall is made by calling the Connect method. **FirewallPassword**: Password to be used if authentication is to be used when connecting through the firewall.If [FirewallHost](#FirewallHost) is specified, the [FirewallUser](#FirewallUser) and [FirewallPassword](#FirewallPassword) settings are used to connect and authenticate to the given firewall. If the authentication fails, the component throws an exception. NOTE: This setting is provided for use by components that do not directly expose Firewall properties. **FirewallPort**: The TCP port for the FirewallHost;.The [FirewallPort](#FirewallPort) is set automatically when [FirewallType](#FirewallType) is set to a valid value. NOTE: This configuration setting is provided for use by components that do not directly expose Firewall properties. **FirewallType**: Determines the type of firewall to connect through.Possible values are as follows: | | | | --- | --- | | 0 | No firewall (default setting). | | 1 | Connect through a tunneling proxy. [FirewallPort](#FirewallPort) is set to 80. | | 2 | Connect through a SOCKS4 Proxy. [FirewallPort](#FirewallPort) is set to 1080. | | 3 | Connect through a SOCKS5 Proxy. [FirewallPort](#FirewallPort) is set to 1080. | | 10 | Connect through a SOCKS4A Proxy. [FirewallPort](#FirewallPort) is set to 1080. | NOTE: This setting is provided for use by components that do not directly expose Firewall properties. **FirewallUser**: A user name if authentication is to be used connecting through a firewall.If the [FirewallHost](#FirewallHost) is specified, the [FirewallUser](#FirewallUser) and [FirewallPassword](#FirewallPassword) settings are used to connect and authenticate to the Firewall. If the authentication fails, the component throws an exception. NOTE: This setting is provided for use by components that do not directly expose Firewall properties. **KeepAliveInterval**: The retry interval, in milliseconds, to be used when a TCP keep-alive packet is sent and no response is received.When set, [TCPKeepAlive](#TCPKeepAlive) will automatically be set to True. A TCP keep-alive packet will be sent after a period of inactivity as defined by [KeepAliveTime](#KeepAliveTime). If no acknowledgment is received from the remote host, the keep-alive packet will be sent again. This configuration setting specifies the interval at which the successive keep-alive packets are sent in milliseconds. This system default if this value is not specified here is 1 second. NOTE: This value is not applicable in macOS. **KeepAliveTime**: The inactivity time in milliseconds before a TCP keep-alive packet is sent.When set, [TCPKeepAlive](#TCPKeepAlive) will automatically be set to True. By default, the operating system will determine the time a connection is idle before a Transmission Control Protocol (TCP) keep-alive packet is sent. This system default if this value is not specified here is 2 hours. In many cases, a shorter interval is more useful. Set this value to the desired interval in milliseconds. **Linger**: When set to True, connections are terminated gracefully.This property controls how a connection is closed. The default is True. In the case that Linger is True (default), two scenarios determine how long the connection will linger. In the first, if [LingerTime](#LingerTime) is 0 (default), the system will attempt to send pending data for a connection until the default IP timeout expires. In the second scenario, if [LingerTime](#LingerTime) is a positive value, the system will attempt to send pending data until the specified [LingerTime](#LingerTime) is reached. If this attempt fails, then the system will reset the connection. The default behavior (which is also the default mode for stream sockets) might result in a long delay in closing the connection. Although the component returns control immediately, the system could hold system resources until all pending data are sent (even after your application closes). Setting this property to False forces an immediate disconnection. If you know that the other side has received all the data you sent (e.g., by a client acknowledgment), setting this property to False might be the appropriate course of action. **LingerTime**: Time in seconds to have the connection linger. LingerTime is the time, in seconds, the socket connection will linger. This value is 0 by default, which means it will use the default IP timeout. **LocalHost**: The name of the local host through which connections are initiated or accepted. The [LocalHost](#localhost-property-mllpserver-component) setting contains the name of the local host as obtained by the *gethostname()* system call, or if the user has assigned an IP address, the value of that address. In multihomed hosts (machines with more than one IP interface), setting LocalHost to the value of an interface will make the component initiate connections (or accept in the case of server components) only through that interface. If the component is connected, the [LocalHost](#localhost-property-mllpserver-component) setting shows the IP address of the interface through which the connection is made in internet dotted format (aaa.bbb.ccc.ddd). In most cases, this is the address of the local host, except for multihomed hosts (machines with more than one IP interface). **LocalPort**: The port in the local host where the component binds. This configuration setting must be set before a connection is attempted. It instructs the component to bind to a specific port (or communication endpoint) in the local machine. Setting this to 0 (default) enables the system to choose a port at random. The chosen port will be shown by [LocalPort](#localport-property-mllpserver-component) after the connection is established. [LocalPort](#localport-property-mllpserver-component) cannot be changed once a connection is made. Any attempt to set this when a connection is active will generate an error. This configuration setting is useful when trying to connect to services that require a trusted port on the client side. An example is the remote shell (rsh) service in UNIX systems. **MaxLineLength**: The maximum amount of data to accumulate when no EOL is found.[MaxLineLength](#MaxLineLength) is the size of an internal buffer, which holds received data while waiting for an EOL string. If an EOL string is found in the input stream before [MaxLineLength](#MaxLineLength) bytes are received, the DataIn event is fired with the *EOL* parameter set to True, and the buffer is reset. If no EOL is found, and [MaxLineLength](#MaxLineLength) bytes are accumulated in the buffer, the DataIn event is fired with the *EOL* parameter set to False, and the buffer is reset. The minimum value for [MaxLineLength](#MaxLineLength) is 256 bytes. The default value is 2048 bytes. **MaxTransferRate**: The transfer rate limit in bytes per second.This configuration setting can be used to throttle outbound TCP traffic. Set this to the number of bytes to be sent per second. By default, this is not set and there is no limit. **ProxyExceptionsList**: A semicolon separated list of hosts and IPs to bypass when using a proxy.This configuration setting optionally specifies a semicolon-separated list of hostnames or IP addresses to bypass when a proxy is in use. When requests are made to hosts specified in this property, the proxy will not be used. For instance: *www.google.com;www.example.com* **TCPKeepAlive**: Determines whether or not the keep alive socket option is enabled.If set to True, the socket's keep-alive option is enabled and keep-alive packets will be sent periodically to maintain the connection. Set [KeepAliveTime](#KeepAliveTime) and [KeepAliveInterval](#KeepAliveInterval) to configure the timing of the keep-alive packets. NOTE: This value is not applicable in Java. **TcpNoDelay**: Whether or not to delay when sending packets. When set to True, the socket will send all data that are ready to send at once. When set to False, the socket will send smaller buffered packets of data at small intervals. This is known as the Nagle algorithm. By default, this configuration setting is set to False. **UseIPv6**: Whether to use IPv6.When set to *0* (default), the component will use IPv4 exclusively. When set to *1*, the component will use IPv6 exclusively. To instruct the component to prefer IPv6 addresses, but use IPv4 if IPv6 is not supported on the system, this setting should be set to *2*. The default value is *0*. Possible values are as follows: | | | | --- | --- | | 0 | IPv4 only | | 1 | IPv6 only | | 2 | IPv6 with IPv4 fallback | **UseNTLMv2**: Whether to use NTLM V2.When authenticating with NTLM, this setting specifies whether NTLM V2 is used. By default this value is True and NTLM V2 will be used. Set this to False to use NTLM V1. ### SSL Config Settings **CACertFilePaths**: The paths to CA certificate files when using Mono on Unix/Linux.This configuration setting specifies the paths on disk to certificate authority (CA) certificate files when using Mono on Unix/Linux. It is not applicable in any other circumstances. The value is formatted as a list of paths separated by semicolons. The component will check for the existence of each file in the order specified. When a file is found, the CA certificates within the file will be loaded and used to determine the validity of server or client certificates. The default value is as follows: */etc/ssl/ca-bundle.pem;/etc/pki/tls/certs/ca-bundle.crt;/etc/ssl/certs/ca-certificates.crt;/etc/pki/tls/cacert.pem* **LogSSLPackets**: Controls whether SSL packets are logged when using the internal security API.When SSLProvider is set to *Internal*, this configuration setting controls whether Secure Sockets Layer (SSL) packets should be logged. By default, this configuration setting is *False*, as it is useful only for debugging purposes. When enabled, SSL packet logs are output using the [SSLStatus](#sslstatus-event-mllpserver-component) event, which will fire each time an SSL packet is sent or received. Enabling this configuration setting has no effect if SSLProvider is set to *Platform*. **ReuseSSLSession**: Determines if the SSL session is reused. If set to True, the component will reuse the context if and only if the following criteria are met: - The target host name is the same. - The system cache entry has not expired (default timeout is 10 hours). - The application process that calls the function is the same. - The logon session is the same. - The instance of the component is the same. **SSLCACerts**: A newline separated list of CA certificates to be included when performing an SSL handshake.When SSLProvider is set to *Internal*, this configuration setting specifies one or more CA certificates to be included with the [SSLCert](#sslcert-property-mllpserver-component) property. Some servers or clients require the entire chain, including CA certificates, to be presented when performing SSL authentication. The value of this configuration setting is a newline-separated (CR/LF) list of certificates. For instance: ```text -----BEGIN CERTIFICATE----- MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw ... Intermediate Cert ... eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w F0I1XhM+pKj7FjDr+XNj -----END CERTIFICATE----- \r \n -----BEGIN CERTIFICATE----- MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp ... Root Cert ... d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA -----END CERTIFICATE----- ``` **SSLCheckCRL**: Whether to check the Certificate Revocation List for the server certificate.This configuration setting specifies whether the component will check the Certificate Revocation List (CRL) specified by the server certificate. If set to 1 or 2, the component will first obtain the list of CRL URLs from the server certificate's CRL distribution points extension. The component will then make HTTP requests to each CRL endpoint to check the validity of the server's certificate. If the certificate has been revoked or any other issues are found during validation the component throws an exception. When set to 0 (default), the CRL check will not be performed by the component. When set to 1, it will attempt to perform the CRL check, but it will continue without an error if the server's certificate does not support CRL. When set to 2, it will perform the CRL check and will throw an error if CRL is not supported. This configuration setting is supported only in the Java, C#, and C++ editions. In the C++ edition, it is supported only on Windows operating systems. **SSLCheckOCSP**: Whether to use OCSP to check the status of the server certificate.This configuration setting specifies whether the component will use OCSP to check the validity of the server certificate. If set to 1 or 2, the component will first obtain the Online Certificate Status Protocol (OCSP) URL from the server certificate's OCSP extension. The component will then locate the issuing certificate and make an HTTP request to the OCSP endpoint to check the validity of the server's certificate. If the certificate has been revoked or any other issues are found during validation, the component throws an exception. When set to 0 (default), the component will not perform an OCSP check. When set to 1, it will attempt to perform the OCSP check, but it will continue without an error if the server's certificate does not support OCSP. When set to 2, it will perform the OCSP check and will throw an error if OCSP is not supported. This configuration setting is supported only in the Java, C#, and C++ editions. In the C++ edition, it is supported only on Windows operating systems. **SSLCipherStrength**: The minimum cipher strength used for bulk encryption. This minimum cipher strength is largely dependent on the security modules installed on the system. If the cipher strength specified is not supported, an error will be returned when connections are initiated. NOTE: This configuration setting contains the minimum cipher strength requested from the security library. The actual cipher strength used for the connection is shown by the [SSLStatus](#sslstatus-event-mllpserver-component) event. Use this configuration setting with caution. Requesting a lower cipher strength than necessary could potentially cause serious security vulnerabilities in your application. When the provider is OpenSSL, [SSLCipherStrength](#SSLCipherStrength) is currently not supported. This functionality is instead made available through the [OpenSSLCipherList](#OpenSSLCipherList) configuration setting. **SSLClientCACerts**: A newline separated list of CA certificates to use during SSL client certificate validation.This configuration setting is only applicable to server components (e.g., TCPServer) see [SSLServerCACerts](#SSLServerCACerts) for client components (e.g., TCPClient). This setting can be used to optionally specify one or more CA certificates to be used when verifying the client certificate that is presented by the client during the SSL handshake when [SSLAuthenticateClients](#sslauthenticateclients-property-mllpserver-component) is enabled. When verifying the client's certificate, the certificates trusted by the system will be used as part of the verification process. If the client's CA certificates are not installed to the trusted system store, they may be specified here so they are included when performing the verification process. This configuration setting should be set only if the client's CA certificates are not already trusted on the system and cannot be installed to the trusted system store. The value of this configuration setting is a newline-separated (CR/LF) list of certificates. For instance: ```text -----BEGIN CERTIFICATE----- MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw ... Intermediate Cert ... eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w F0I1XhM+pKj7FjDr+XNj -----END CERTIFICATE----- \r \n -----BEGIN CERTIFICATE----- MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp ... Root Cert ... d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA -----END CERTIFICATE----- ``` **SSLEnabledCipherSuites**: The cipher suite to be used in an SSL negotiation.This configuration setting enables the cipher suites to be used in SSL negotiation. By default, the enabled cipher suites will include all available ciphers ("*"). The special value "*" means that the component will pick all of the supported cipher suites. If [SSLEnabledCipherSuites](#SSLEnabledCipherSuites) is set to any other value, only the specified cipher suites will be considered. Multiple cipher suites are separated by semicolons. Example values when SSLProvider is set to *Platform* include the following: ```text obj.config("SSLEnabledCipherSuites=*"); obj.config("SSLEnabledCipherSuites=CALG_AES_256"); obj.config("SSLEnabledCipherSuites=CALG_AES_256;CALG_3DES"); ``` Possible values when SSLProvider is set to *Platform* include the following: - CALG_3DES - CALG_3DES_112 - CALG_AES - CALG_AES_128 - CALG_AES_192 - CALG_AES_256 - CALG_AGREEDKEY_ANY - CALG_CYLINK_MEK - CALG_DES - CALG_DESX - CALG_DH_EPHEM - CALG_DH_SF - CALG_DSS_SIGN - CALG_ECDH - CALG_ECDH_EPHEM - CALG_ECDSA - CALG_ECMQV - CALG_HASH_REPLACE_OWF - CALG_HUGHES_MD5 - CALG_HMAC - CALG_KEA_KEYX - CALG_MAC - CALG_MD2 - CALG_MD4 - CALG_MD5 - CALG_NO_SIGN - CALG_OID_INFO_CNG_ONLY - CALG_OID_INFO_PARAMETERS - CALG_PCT1_MASTER - CALG_RC2 - CALG_RC4 - CALG_RC5 - CALG_RSA_KEYX - CALG_RSA_SIGN - CALG_SCHANNEL_ENC_KEY - CALG_SCHANNEL_MAC_KEY - CALG_SCHANNEL_MASTER_HASH - CALG_SEAL - CALG_SHA - CALG_SHA1 - CALG_SHA_256 - CALG_SHA_384 - CALG_SHA_512 - CALG_SKIPJACK - CALG_SSL2_MASTER - CALG_SSL3_MASTER - CALG_SSL3_SHAMD5 - CALG_TEK - CALG_TLS1_MASTER - CALG_TLS1PRF Example values when SSLProvider is set to *Internal*include the following: ```text obj.config("SSLEnabledCipherSuites=*"); obj.config("SSLEnabledCipherSuites=TLS_DHE_DSS_WITH_AES_128_CBC_SHA"); obj.config("SSLEnabledCipherSuites=TLS_DHE_DSS_WITH_AES_128_CBC_SHA;TLS_ECDH_RSA_WITH_AES_128_CBC_SHA"); ``` Possible values when SSLProvider is set to *Internal* include the following: - TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 - TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 - TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 - TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 - TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384 - TLS_RSA_WITH_AES_256_GCM_SHA384 - TLS_RSA_WITH_AES_128_GCM_SHA256 - TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256 - TLS_DHE_DSS_WITH_AES_256_GCM_SHA384 - TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 - TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384 - TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256 - TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 - TLS_DHE_DSS_WITH_AES_128_GCM_SHA256 - TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 - TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 - TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384 - TLS_DHE_DSS_WITH_AES_256_CBC_SHA256 - TLS_RSA_WITH_AES_256_CBC_SHA256 - TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 - TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384 - TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 - TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 - TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 - TLS_RSA_WITH_AES_128_CBC_SHA256 - TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256 - TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256 - TLS_DHE_DSS_WITH_AES_128_CBC_SHA256 - TLS_RSA_WITH_AES_256_CBC_SHA - TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA - TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA - TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA - TLS_DHE_RSA_WITH_AES_256_CBC_SHA - TLS_ECDH_RSA_WITH_AES_256_CBC_SHA - TLS_DHE_DSS_WITH_AES_256_CBC_SHA - TLS_RSA_WITH_AES_128_CBC_SHA - TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA - TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA - TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA - TLS_ECDH_RSA_WITH_AES_128_CBC_SHA - TLS_DHE_RSA_WITH_AES_128_CBC_SHA - TLS_DHE_DSS_WITH_AES_128_CBC_SHA - TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA - TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA - TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA - TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA - TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA - TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA - TLS_RSA_WITH_3DES_EDE_CBC_SHA - TLS_RSA_WITH_DES_CBC_SHA - TLS_DHE_RSA_WITH_DES_CBC_SHA - TLS_DHE_DSS_WITH_DES_CBC_SHA - TLS_RSA_WITH_RC4_128_MD5 - TLS_RSA_WITH_RC4_128_SHA When TLS 1.3 is negotiated (see [SSLEnabledProtocols](#SSLEnabledProtocols)), only the following cipher suites are supported: - TLS_AES_256_GCM_SHA384 - TLS_CHACHA20_POLY1305_SHA256 - TLS_AES_128_GCM_SHA256 [SSLEnabledCipherSuites](#SSLEnabledCipherSuites) is used together with [SSLCipherStrength](#SSLCipherStrength). **SSLEnabledProtocols**: Used to enable/disable the supported security protocols.This configuration setting is used to enable or disable the supported security protocols. Not all supported protocols are enabled by default. The default value is *4032* for client components, and *3072* for server components. To specify a combination of enabled protocol versions set this config to the binary *OR* of one or more of the following values: | | | | --- | --- | | TLS1.3 | 12288 (Hex 3000) | | TLS1.2 | 3072 (Hex C00) (Default - Client and Server) | | TLS1.1 | 768 (Hex 300) (Default - Client) | | TLS1 | 192 (Hex C0) (Default - Client) | | SSL3 | 48 (Hex 30) | | SSL2 | 12 (Hex 0C) | Note that only TLS 1.2 is enabled for server components that accept incoming connections. This adheres to industry standards to ensure a secure connection. Client components enable TLS 1.0, TLS 1.1, and TLS 1.2 by default and will negotiate the highest mutually supported version when connecting to a server, which should be TLS 1.2 in most cases. **SSLEnabledProtocols: Transport Layer Security (TLS) 1.3 Notes:** By default when TLS 1.3 is enabled, the component will first try to use the platform TLS 1.3 implementation when the SSLProvider is set to Automatic for all editions. If the platform TLS 1.3 implementation is not available, the internal implementation will be used. In editions that are designed to run on Windows, SSLProvider can be set to Platform to use the platform implementation instead of the internal implementation. When configured in this manner, please note that the platform provider is supported only on Windows 11/Windows Server 2022 and up. The default internal provider is available on all platforms and is not restricted to any specific OS version. If set to *1* (Platform provider), please be aware of the following notes: - The platform provider is available only on Windows 11/Windows Server 2022 and up. - [SSLEnabledCipherSuites](#SSLEnabledCipherSuites) and other similar SSL configuration settings are not supported. - If [SSLEnabledProtocols](#SSLEnabledProtocols) includes both TLS 1.3 and TLS 1.2, these restrictions are still applicable even if TLS 1.2 is negotiated. Enabling TLS 1.3 with the platform provider changes the implementation used for all TLS versions. **SSLEnabledProtocols: SSL2 and SSL3 Notes: ** SSL 2.0 and 3.0 are not supported by the component when the SSLProvider is set to internal. To use SSL 2.0 or SSL 3.0, the platform security API must have the protocols enabled and SSLProvider needs to be set to platform. **SSLEnableRenegotiation**: Whether the renegotiation_info SSL extension is supported.This configuration setting specifies whether the renegotiation_info SSL extension will be used in the request when using the internal security API. This configuration setting is *false* by default, but it can be set to *true* to enable the extension. This configuration setting is applicable only when SSLProvider is set to *Internal*. **SSLIncludeCertChain**: Whether the entire certificate chain is included in the SSLServerAuthentication event.This configuration setting specifies whether the Encoded parameter of the SSLServerAuthentication event contains the full certificate chain. By default this value is False and only the leaf certificate will be present in the Encoded parameter of the SSLServerAuthentication event. If set to True, all certificates returned by the server will be present in the Encoded parameter of the SSLServerAuthentication event. This includes the leaf certificate, any intermediate certificate, and the root certificate. Note: When SSLProvider is set to *Internal* this value is automatically set to *true*. This is needed for proper validation when using the internal provider. **SSLKeyLogFile**: The location of a file where per-session secrets are written for debugging purposes.This configuration setting optionally specifies the full path to a file on disk where per-session secrets are stored for debugging purposes. When set, the component will save the session secrets in the same format as the SSLKEYLOGFILE environment variable functionality used by most major browsers and tools, such as Chrome, Firefox, and cURL. This file can then be used in tools such as Wireshark to decrypt TLS traffic for debugging purposes. When writing to this file, the component will only append, it will not overwrite previous values. NOTE: This configuration setting is applicable only when SSLProvider is set to *Internal*. **SSLNegotiatedCipher**: Returns the negotiated cipher suite.This configuration setting returns the cipher suite negotiated during the SSL handshake. NOTE: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example: ```csharp server.Config("SSLNegotiatedCipher[connId]"); ``` **SSLNegotiatedCipherStrength**: Returns the negotiated cipher suite strength.This configuration setting returns the strength of the cipher suite negotiated during the SSL handshake. NOTE: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example: ```csharp server.Config("SSLNegotiatedCipherStrength[connId]"); ``` **SSLNegotiatedCipherSuite**: Returns the negotiated cipher suite.This configuration setting returns the cipher suite negotiated during the SSL handshake represented as a single string. NOTE: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example: ```csharp server.Config("SSLNegotiatedCipherSuite[connId]"); ``` **SSLNegotiatedKeyExchange**: Returns the negotiated key exchange algorithm.This configuration setting returns the key exchange algorithm negotiated during the SSL handshake. NOTE: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example: ```csharp server.Config("SSLNegotiatedKeyExchange[connId]"); ``` **SSLNegotiatedKeyExchangeStrength**: Returns the negotiated key exchange algorithm strength.This configuration setting returns the strength of the key exchange algorithm negotiated during the SSL handshake. NOTE: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example: ```csharp server.Config("SSLNegotiatedKeyExchangeStrength[connId]"); ``` **SSLNegotiatedVersion**: Returns the negotiated protocol version.This configuration setting returns the protocol version negotiated during the SSL handshake. NOTE: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example: ```csharp server.Config("SSLNegotiatedVersion[connId]"); ``` **SSLSecurityFlags**: Flags that control certificate verification.The following flags are defined (specified in hexadecimal notation). They can be ORed together to exclude multiple conditions: | | | | --- | --- | | 0x00000001 | Ignore time validity status of certificate. | | 0x00000002 | Ignore time validity status of CTL. | | 0x00000004 | Ignore non-nested certificate times. | | 0x00000010 | Allow unknown certificate authority. | | 0x00000020 | Ignore wrong certificate usage. | | 0x00000100 | Ignore unknown certificate revocation status. | | 0x00000200 | Ignore unknown CTL signer revocation status. | | 0x00000400 | Ignore unknown certificate authority revocation status. | | 0x00000800 | Ignore unknown root revocation status. | | 0x00008000 | Allow test root certificate. | | 0x00004000 | Trust test root certificate. | | 0x80000000 | Ignore non-matching CN (certificate CN non-matching server name). | This functionality is currently not available in Java or when the provider is OpenSSL. **SSLServerCACerts**: A newline separated list of CA certificates to use during SSL server certificate validation.This configuration setting is only used by client components (e.g., TCPClient) see [SSLClientCACerts](#SSLClientCACerts) for server components (e.g., TCPServer). This configuration setting can be used to optionally specify one or more CA certificates to be used when connecting to the server and verifying the server certificate. When verifying the server's certificate, the certificates trusted by the system will be used as part of the verification process. If the server's CA certificates are not installed to the trusted system store, they may be specified here so they are included when performing the verification process. This configuration setting should be set only if the server's CA certificates are not already trusted on the system and cannot be installed to the trusted system store. The value of this configuration setting is a newline-separated (CR/LF) list of certificates. For instance: ```text -----BEGIN CERTIFICATE----- MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw ... Intermediate Cert... eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w F0I1XhM+pKj7FjDr+XNj -----END CERTIFICATE----- \r \n -----BEGIN CERTIFICATE----- MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp ... Root Cert... d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA -----END CERTIFICATE----- ``` **TLS12SignatureAlgorithms**: Defines the allowed TLS 1.2 signature algorithms when SSLProvider is set to Internal.This configuration setting specifies the allowed server certificate signature algorithms when SSLProvider is set to *Internal* and [SSLEnabledProtocols](#SSLEnabledProtocols) is set to allow TLS 1.2. When specified the component will verify that the server certificate signature algorithm is among the values specified in this configuration setting. If the server certificate signature algorithm is unsupported, the component throws an exception. The format of this value is a comma-separated list of hash-signature combinations. For instance: ```csharp component.SSLProvider = TCPClientSSLProviders.sslpInternal; component.Config("SSLEnabledProtocols=3072"); //TLS 1.2 component.Config("TLS12SignatureAlgorithms=sha256-rsa,sha256-dsa,sha1-rsa,sha1-dsa"); ``` The default value for this configuration setting is *sha512-ecdsa,sha512-rsa,sha512-dsa,sha384-ecdsa,sha384-rsa,sha384-dsa,sha256-ecdsa,sha256-rsa,sha256-dsa,sha224-ecdsa,sha224-rsa,sha224-dsa,sha1-ecdsa,sha1-rsa,sha1-dsa*. To not restrict the server's certificate signature algorithm, specify an empty string as the value for this configuration setting, which will cause the signature_algorithms TLS 1.2 extension to not be sent. **TLS12SupportedGroups**: The supported groups for ECC.This configuration setting specifies a comma-separated list of named groups used in TLS 1.2 for ECC. The default value is *ecdhe_secp256r1,ecdhe_secp384r1,ecdhe_secp521r1*. When using TLS 1.2 and SSLProvider is set to *Internal*, the values refer to the supported groups for ECC. The following values are supported: - "ecdhe_secp256r1" (default) - "ecdhe_secp384r1" (default) - "ecdhe_secp521r1" (default) **TLS13KeyShareGroups**: The groups for which to pregenerate key shares.This configuration setting specifies a comma-separated list of named groups used in TLS 1.3 for key exchange. The groups specified here will have key share data pregenerated locally before establishing a connection. This can prevent an additional roundtrip during the handshake if the group is supported by the server. The default value is set to balance common supported groups and the computational resources required to generate key shares. As a result, only some groups are included by default in this configuration setting. NOTE: All supported groups can always be used during the handshake even if not listed here, but if a group is used that is not present in this list, it will incur an additional roundtrip and time to generate the key share for that group. In most cases, this configuration setting does not need to be modified. This should be modified only if there is a specific reason to do so. The default value is *ecdhe_x25519,ecdhe_secp256r1,ecdhe_secp384r1,ffdhe_2048,ffdhe_3072* The values are ordered from most preferred to least preferred. The following values are supported: - "ecdhe_x25519" (default) - "ecdhe_x448" - "ecdhe_secp256r1" (default) - "ecdhe_secp384r1" (default) - "ecdhe_secp521r1" - "ffdhe_2048" (default) - "ffdhe_3072" (default) - "ffdhe_4096" - "ffdhe_6144" - "ffdhe_8192" **TLS13SignatureAlgorithms**: The allowed certificate signature algorithms.This configuration setting holds a comma-separated list of allowed signature algorithms. Possible values include the following: - "ed25519" (default) - "ed448" (default) - "ecdsa_secp256r1_sha256" (default) - "ecdsa_secp384r1_sha384" (default) - "ecdsa_secp521r1_sha512" (default) - "rsa_pkcs1_sha256" (default) - "rsa_pkcs1_sha384" (default) - "rsa_pkcs1_sha512" (default) - "rsa_pss_sha256" (default) - "rsa_pss_sha384" (default) - "rsa_pss_sha512" (default) The default value is *rsa_pss_sha256,rsa_pss_sha384,rsa_pss_sha512,rsa_pkcs1_sha256,rsa_pkcs1_sha384,rsa_pkcs1_sha512,ecdsa_secp256r1_sha256,ecdsa_secp384r1_sha384,ecdsa_secp521r1_sha512,ed25519,ed448*. This configuration setting is applicable only when [SSLEnabledProtocols](#SSLEnabledProtocols) includes TLS 1.3. **TLS13SupportedGroups**: The supported groups for (EC)DHE key exchange.This configuration setting specifies a comma-separated list of named groups used in TLS 1.3 for key exchange. This configuration setting should be modified only if there is a specific reason to do so. The default value is *ecdhe_x25519,ecdhe_x448,ecdhe_secp256r1,ecdhe_secp384r1,ecdhe_secp521r1,ffdhe_2048,ffdhe_3072,ffdhe_4096,ffdhe_6144,ffdhe_8192,mlkem_512,mlkem_768,mlkem_1024,x25519_mlkem_768,secp256r1_mlkem_768* The values are ordered from most preferred to least preferred. The following values are supported: - "ecdhe_x25519" (default) - "ecdhe_x448" (default) - "ecdhe_secp256r1" (default) - "ecdhe_secp384r1" (default) - "ecdhe_secp521r1" (default) - "ffdhe_2048" (default) - "ffdhe_3072" (default) - "ffdhe_4096" (default) - "ffdhe_6144" (default) - "ffdhe_8192" (default) - "mlkem_512" (default) - "mlkem_768" (default) - "mlkem_1024" (default) - "x25519_mlkem_768" (default) - "secp256r1_mlkem_768" (default) Post-quantum algorithms (*mlkem_512,mlkem_768,mlkem_1024,x25519_mlkem_768,secp256r1_mlkem_768*) in our components rely on the operating system's underlying cryptographic primitives. The following platforms are currently supported: - Windows Server 2025 - Windows 11 24H2 - Windows 11 25H2 ### Socket Config Settings **AbsoluteTimeout**: Determines whether timeouts are inactivity timeouts or absolute timeouts.If [AbsoluteTimeout](#AbsoluteTimeout) is set to True, any method that does not complete within Timeout seconds will be aborted. By default, *AbsoluteTimeout* is False, and the timeout is an inactivity timeout. NOTE: This option is not valid for User Datagram Protocol (UDP) ports. **FirewallData**: Used to send extra data to the firewall.When the firewall is a tunneling proxy, use this property to send custom (additional) headers to the firewall (e.g., headers for custom authentication schemes). **InBufferSize**: The size in bytes of the incoming queue of the socket.This is the size of an internal queue in the Transmission Control Protocol (TCP)/IP stack. You can increase or decrease its size depending on the amount of data that you will be receiving. In some cases, increasing the value of the *InBufferSize* setting can provide significant improvements in performance. Some TCP/IP implementations do not support variable buffer sizes. If that is the case, when the component is activated the *InBufferSize* reverts to its defined size. The same happens if you attempt to make it too large or too small. **OutBufferSize**: The size in bytes of the outgoing queue of the socket.This is the size of an internal queue in the TCP/IP stack. You can increase or decrease its size depending on the amount of data that you will be sending. In some cases, increasing the value of the *OutBufferSize* setting can provide significant improvements in performance. Some TCP/IP implementations do not support variable buffer sizes. If that is the case, when the component is activated the *OutBufferSize* reverts to its defined size. The same happens if you attempt to make it too large or too small. ### Base Config Settings **BuildInfo**: Information about the product's build.When queried, this setting will return a string containing information about the product's build. **GUIAvailable**: Whether or not a message loop is available for processing events.In a GUI-based application, long-running blocking operations may cause the application to stop responding to input until the operation returns. The component will attempt to discover whether or not the application has a message loop and, if one is discovered, it will process events in that message loop during any such blocking operation. In some non-GUI applications, an invalid message loop may be discovered that will result in errant behavior. In these cases, setting [GUIAvailable](#GUIAvailable) to *false* will ensure that the component does not attempt to process external events. **LicenseInfo**: Information about the current license.When queried, this setting will return a string containing information about the license this instance of a component is using. It will return the following information: - Product: The product the license is for. - Product Key: The key the license was generated from. - License Source: Where the license was found (e.g., RuntimeLicense, License File). - License Type: The type of license installed (e.g., Royalty Free, Single Server). - Last Valid Build: The last valid build number for which the license will work. **MaskSensitiveData**: Whether sensitive data is masked in log messages.In certain circumstances it may be beneficial to mask sensitive data, like passwords, in log messages. Set this to *true* to mask sensitive data. The default is *true*. **UseFIPSCompliantAPI**: Tells the component whether or not to use FIPS certified APIs.When set to *true*, the component will utilize the underlying operating system's certified APIs. Java editions, regardless of OS, utilize Bouncy Castle Federal Information Processing Standards (FIPS), while all other Windows editions make use of Microsoft security libraries. FIPS mode can be enabled by setting the *UseFIPSCompliantAPI* configuration setting to *true*. This is a static setting that applies to all instances of all components of the toolkit within the process. It is recommended to enable or disable this setting once before the component has been used to establish a connection. Enabling FIPS while an instance of the component is active and connected may result in unexpected behavior. For more details, please see the [FIPS 140-2 Compliance](https://www.nsoftware.com/kb/articles/fips.rst) article. NOTE: This setting is applicable only on Windows. NOTE: Enabling FIPS compliance requires a special license; please contact [sales@nsoftware.com](mailto:sales@nsoftware.com) for details. **UseInternalSecurityAPI**: Whether or not to use the system security libraries or an internal implementation. When set to *false*, the component will use the system security libraries by default to perform cryptographic functions where applicable. In this case, calls to unmanaged code will be made. In certain environments, this is not desirable. To use a completely managed security implementation, set this setting to *true*. Setting this configuration setting to *true* tells the component to use the internal implementation instead of using the system security libraries. On Windows, this setting is set to *false* by default. On Linux/macOS, this setting is set to *true* by default. NOTE: This setting is static. The value set is applicable to all components used in the application. When this value is set, the product's system dynamic link library (DLL) is no longer required as a reference, as all unmanaged code is stored in that file. # Trappable Errors ([MLLPServer](#mllpserver-component) Component) ### MLLPServer Errors | | | | --- | --- | | 670 | Received a negative acknowledgement. The other party received the message but could not commit the HL7 content to storage. | | 671 | Data was invalid. A timeout occurred or the message block was improperly formatted. | | 672 | Connection interrupted. A party disconnected while transferring data and the file stream had to be forcibly closed. | ### TCPClient Errors | | | | --- | --- | | 100 | You cannot change the RemotePort at this time. A connection is in progress. | | 101 | You cannot change the RemoteHost (Server) at this time. A connection is in progress. | | 102 | The RemoteHost address is invalid (0.0.0.0). | | 104 | Already connected. If you want to reconnect, close the current connection first. | | 106 | You cannot change the [LocalPort](#localport-property-mllpserver-component) at this time. A connection is in progress. | | 107 | You cannot change the [LocalHost](#localhost-property-mllpserver-component) at this time. A connection is in progress. | | 112 | You cannot change [MaxLineLength](#MaxLineLength) at this time. A connection is in progress. | | 116 | RemotePort cannot be zero. Please specify a valid service port number. | | 117 | You cannot change the UseConnection option while the component is active. | | 135 | Operation would block. | | 201 | Timeout. | | 211 | Action impossible in control's present state. | | 212 | Action impossible while not connected. | | 213 | Action impossible while listening. | | 301 | Timeout. | | 303 | Could not open file. | | 434 | Unable to convert string to selected CodePage. | | 1105 | Already connecting. If you want to reconnect, close the current connection first. | | 1117 | You need to connect first. | | 1119 | You cannot change the LocalHost at this time. A connection is in progress. | | 1120 | Connection dropped by remote host. | ### TCP/IP Errors | | | | --- | --- | | 10004 | [10004] Interrupted system call. | | 10009 | [10009] Bad file number. | | 10013 | [10013] Access denied. | | 10014 | [10014] Bad address. | | 10022 | [10022] Invalid argument. | | 10024 | [10024] Too many open files. | | 10035 | [10035] Operation would block. | | 10036 | [10036] Operation now in progress. | | 10037 | [10037] Operation already in progress. | | 10038 | [10038] Socket operation on nonsocket. | | 10039 | [10039] Destination address required. | | 10040 | [10040] Message is too long. | | 10041 | [10041] Protocol wrong type for socket. | | 10042 | [10042] Bad protocol option. | | 10043 | [10043] Protocol is not supported. | | 10044 | [10044] Socket type is not supported. | | 10045 | [10045] Operation is not supported on socket. | | 10046 | [10046] Protocol family is not supported. | | 10047 | [10047] Address family is not supported by protocol family. | | 10048 | [10048] Address already in use. | | 10049 | [10049] Cannot assign requested address. | | 10050 | [10050] Network is down. | | 10051 | [10051] Network is unreachable. | | 10052 | [10052] Net dropped connection or reset. | | 10053 | [10053] Software caused connection abort. | | 10054 | [10054] Connection reset by peer. | | 10055 | [10055] No buffer space available. | | 10056 | [10056] Socket is already connected. | | 10057 | [10057] Socket is not connected. | | 10058 | [10058] Cannot send after socket shutdown. | | 10059 | [10059] Too many references, cannot splice. | | 10060 | [10060] Connection timed out. | | 10061 | [10061] Connection refused. | | 10062 | [10062] Too many levels of symbolic links. | | 10063 | [10063] File name is too long. | | 10064 | [10064] Host is down. | | 10065 | [10065] No route to host. | | 10066 | [10066] Directory is not empty | | 10067 | [10067] Too many processes. | | 10068 | [10068] Too many users. | | 10069 | [10069] Disc Quota Exceeded. | | 10070 | [10070] Stale NFS file handle. | | 10071 | [10071] Too many levels of remote in path. | | 10091 | [10091] Network subsystem is unavailable. | | 10092 | [10092] WINSOCK DLL Version out of range. | | 10093 | [10093] Winsock is not loaded yet. | | 11001 | [11001] Host not found. | | 11002 | [11002] Nonauthoritative 'Host not found' (try again or check DNS setup). | | 11003 | [11003] Nonrecoverable errors: FORMERR, REFUSED, NOTIMP. | | 11004 | [11004] Valid name, no data record (check DNS setup). |