MLLPClient Component

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The MLLPClient component implements the client side of the Minimal Lower Layer Protocol.

Syntax

nsoftware.IPWorksEDI.MLLPClient

Remarks

The MLLPClient component is used to exchange HL7 data with an MLLP server.

Connecting

To begin using the MLLPClient component, connect to an MLLP server. Connecting is simple, start by setting the SSLEnabled property to True if desired. Then either set the RemoteHost and RemotePort properties before setting the Connected property to True; or simply call the Connect method, passing it the remote host and port values directly.

When the MLLPClient first connects to the server, the Connected event fires. Additional information about the status of the connection can be accessed through the ConnectionStatus event. If the SSLEnabled property is True the SSLServerAuthentication and SSLStatus events will also fire.

Connecting Example mllpClient.RemoteHost = "MyHostNameOrIP"; mllpClient.RemotePort = 777; mllpClient.SSLEnabled = true; mllpClient.Connected = true;

Sending Data

Once connected, specify the HL7 data to send by doing one of the following:

  • Call the SetInputStream method, passing it a stream with HL7 data.
  • Set the InputFileName property to the path of a file with HL7 data.
  • Set the HL7 data directly to the InputData property.

Once the data has been specified, simply call the Send method to send the HL7 data to the server. Once the server has received the data, it will respond with an acknowledgement, causing the component's AckIn event to fire.

Sending Data Example mllpClient.InputData = "HL7Data"; mllpClient.Send();

Receiving Data

The MLLPClient component will automatically receive HL7 data sent from the server, and will automatically send an acknowledgement back.

When the MLLPClient component is receiving data, immediately before data transfer begins the StartTransfer event fires. During data transfer, one or more Transfer events will fire. When data transfer is complete, the EndTransfer event fires. Any errors during data delivery will cause the Error event to fire.

Immediately before the client acknowledgement is sent the AckOut event fires. The Accept parameter of this event is used to determine the type of acknowledgement (ACK or NAK) to send back to the server.

HL7 data received by the MLLPClient component will be stored in one of the following ways:

  • If an output stream has been specified using the SetOutputStream method, the data is written to that stream.
  • Otherwise, if an output file path has been set to the OutputFileName property, the data is written to that file.
  • Otherwise, the data is stored in the OutputData property.

Property List

The following is the full list of the properties of the component with short descriptions. Click on the links for further details.

ConnectedThis property indicates whether the component is connected.
FirewallA set of properties related to firewall access.
InputDataThe raw HL7 data to send.
InputFileNameThe path of a file containing HL7 data to send.
KeepAliveWhen True, KEEPALIVE packets are enabled (for long connections).
LocalHostThe name of the local host or user-assigned IP interface through which connections are initiated or accepted.
LocalPortThe TCP port in the local host where the component binds.
OutputDataThe raw HL7 data received.
OutputFileNameThe path of a file in which to store received HL7 data.
RemoteHostThis property includes the address of the remote host. Domain names are resolved to IP addresses.
RemotePortThis property includes the Transmission Control Protocol (TCP) port in the remote host.
SSLAcceptServerCertInstructs the component to unconditionally accept the server certificate that matches the supplied certificate.
SSLCertThe certificate to be used during Secure Sockets Layer (SSL) negotiation.
SSLEnabledThis property indicates whether Transport Layer Security/Secure Sockets Layer (TLS/SSL) is enabled.
SSLServerCertThe server certificate for the last established connection.
TimeoutThis property includes the timeout for the component.
VersionThe 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.

ConfigSets or retrieves a configuration setting.
ConnectThis method connects to a remote host.
DisconnectThis method disconnects from the remote host.
DoEventsThis method processes events from the internal message queue.
InterruptThis method interrupts the current action.
ResetThis method will reset the component.
SendSends HL7 data to the MLLP server.
SetInputStreamSpecifies a stream containing HL7 data to send.
SetOutputStreamSpecifies a stream to which received HL7 data should be written.

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.

AckInFires immediately after receiving an acknowledgement from the server.
AckOutFires immediately before sending an acknowledgement to the server.
ConnectedFired immediately after a connection completes (or fails).
ConnectionStatusFired to indicate changes in the connection state.
DisconnectedFired when a connection is closed.
EndTransferFires after incoming HL7 data finishes transferring.
ErrorFired when information is available about errors during data delivery.
LogProvides logging information.
SSLServerAuthenticationFired after the server presents its certificate to the client.
SSLStatusFired when secure connection progress messages are available.
StartTransferFires before incoming HL7 data begins transferring.
TransferFires 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.

ACKCharThe positive acknowledgement character.
EndBlockCharThe character that denotes the end of HL7 data.
EOLCharThe character that denotes the end of a message block.
LogLevelThe level of detail that is logged.
NAKCharThe negative acknowledgement character.
ReceiveTimeoutMaximum number of seconds to wait after receiving a StartBlockChar.
StartBlockCharThe character that denotes the beginning of HL7 data.
CloseStreamAfterTransferIf true, the component will close the upload or download stream after the transfer.
ConnectionTimeoutSets a separate timeout value for establishing a connection.
FirewallAutoDetectTells the component whether or not to automatically detect and use firewall system settings, if available.
FirewallHostName or IP address of firewall (optional).
FirewallListenerIf true, the component binds to a SOCKS firewall as a server (TCPClient only).
FirewallPasswordPassword to be used if authentication is to be used when connecting through the firewall.
FirewallPortThe TCP port for the FirewallHost;.
FirewallTypeDetermines the type of firewall to connect through.
FirewallUserA user name if authentication is to be used connecting through a firewall.
KeepAliveIntervalThe retry interval, in milliseconds, to be used when a TCP keep-alive packet is sent and no response is received.
KeepAliveTimeThe inactivity time in milliseconds before a TCP keep-alive packet is sent.
LingerWhen set to True, connections are terminated gracefully.
LingerTimeTime in seconds to have the connection linger.
LocalHostThe name of the local host through which connections are initiated or accepted.
LocalPortThe port in the local host where the component binds.
MaxLineLengthThe maximum amount of data to accumulate when no EOL is found.
MaxTransferRateThe transfer rate limit in bytes per second.
ProxyExceptionsListA semicolon separated list of hosts and IPs to bypass when using a proxy.
TCPKeepAliveDetermines whether or not the keep alive socket option is enabled.
TcpNoDelayWhether or not to delay when sending packets.
UseIPv6Whether to use IPv6.
UseNTLMv2Whether to use NTLM V2.
CACertFilePathsThe paths to CA certificate files when using Mono on Unix/Linux.
LogSSLPacketsControls whether SSL packets are logged when using the internal security API.
ReuseSSLSessionDetermines if the SSL session is reused.
SSLCACertsA newline separated list of CA certificates to be included when performing an SSL handshake.
SSLCheckCRLWhether to check the Certificate Revocation List for the server certificate.
SSLCheckOCSPWhether to use OCSP to check the status of the server certificate.
SSLCipherStrengthThe minimum cipher strength used for bulk encryption.
SSLClientCACertsA newline separated list of CA certificates to use during SSL client certificate validation.
SSLEnabledCipherSuitesThe cipher suite to be used in an SSL negotiation.
SSLEnabledProtocolsUsed to enable/disable the supported security protocols.
SSLEnableRenegotiationWhether the renegotiation_info SSL extension is supported.
SSLIncludeCertChainWhether the entire certificate chain is included in the SSLServerAuthentication event.
SSLKeyLogFileThe location of a file where per-session secrets are written for debugging purposes.
SSLNegotiatedCipherReturns the negotiated cipher suite.
SSLNegotiatedCipherStrengthReturns the negotiated cipher suite strength.
SSLNegotiatedCipherSuiteReturns the negotiated cipher suite.
SSLNegotiatedKeyExchangeReturns the negotiated key exchange algorithm.
SSLNegotiatedKeyExchangeStrengthReturns the negotiated key exchange algorithm strength.
SSLNegotiatedVersionReturns the negotiated protocol version.
SSLSecurityFlagsFlags that control certificate verification.
SSLServerCACertsA newline separated list of CA certificates to use during SSL server certificate validation.
TLS12SignatureAlgorithmsDefines the allowed TLS 1.2 signature algorithms when SSLProvider is set to Internal.
TLS12SupportedGroupsThe supported groups for ECC.
TLS13KeyShareGroupsThe groups for which to pregenerate key shares.
TLS13SignatureAlgorithmsThe allowed certificate signature algorithms.
TLS13SupportedGroupsThe supported groups for (EC)DHE key exchange.
AbsoluteTimeoutDetermines whether timeouts are inactivity timeouts or absolute timeouts.
FirewallDataUsed to send extra data to the firewall.
InBufferSizeThe size in bytes of the incoming queue of the socket.
OutBufferSizeThe size in bytes of the outgoing queue of the socket.
BuildInfoInformation about the product's build.
GUIAvailableWhether or not a message loop is available for processing events.
LicenseInfoInformation about the current license.
MaskSensitiveDataWhether sensitive data is masked in log messages.
UseFIPSCompliantAPITells the component whether or not to use FIPS certified APIs.
UseInternalSecurityAPIWhether or not to use the system security libraries or an internal implementation.

Connected Property (MLLPClient Component)

This property indicates whether the component is connected.

Syntax

public bool Connected { get; }

Public ReadOnly Property Connected As Boolean

Default Value

False

Remarks

This property indicates whether the component is connected to the remote host. Use the Connect and Disconnect methods to manage the connection.

This property is read-only and not available at design time.

Firewall Property (MLLPClient Component)

A set of properties related to firewall access.

Syntax

public Firewall Firewall { get; set; }

Public Property Firewall As Firewall

Remarks

This is a Firewall-type property, which contains fields describing the firewall through which the component will attempt to connect.

Please refer to the Firewall type for a complete list of fields.

InputData Property (MLLPClient Component)

The raw HL7 data to send.

Syntax

public string InputData { get; set; }
public byte[] InputDataB { get; set; }

Public Property InputData As String
Public Property InputDataB As Byte()

Default Value

""

Remarks

This property is used to specify the HL7 data to send when the Send method is called.

Note that the component checks the following places for input data, in order, when Send is called. Input data is sent from the first place it is found:

  • A stream specified using the SetInputStream method.
  • The contents of a file whose path has been set to the InputFileName property.
  • The data set to the InputData property.

This property is not available at design time.

InputFileName Property (MLLPClient Component)

The path of a file containing HL7 data to send.

Syntax

public string InputFileName { get; set; }

Public Property InputFileName As String

Default Value

""

Remarks

This property is used to specify a path to a file whose contents will be sent when the Send method is called.

Note that the component checks the following places for input data, in order, when Send is called. Input data is sent from the first place it is found:

  • A stream specified using the SetInputStream method.
  • The contents of a file whose path has been set to the InputFileName property.
  • The data set to the InputData property.

This property is not available at design time.

KeepAlive Property (MLLPClient Component)

When True, KEEPALIVE packets are enabled (for long connections).

Syntax

public bool KeepAlive { get; set; }

Public Property KeepAlive As Boolean

Default Value

False

Remarks

The KeepAlive enables the SO_KEEPALIVE option on the socket. 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.

LocalHost Property (MLLPClient Component)

The name of the local host or user-assigned IP interface through which connections are initiated or accepted.

Syntax

public string LocalHost { get; set; }

Public Property LocalHost As String

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 (MLLPClient Component)

The TCP port in the local host where the component binds.

Syntax

public int LocalPort { get; set; }

Public Property LocalPort As Integer

Default Value

0

Remarks

This property 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 property to 0 (default) enables the system to choose an open port at random. The chosen port will be returned by the LocalPort property after the connection is established.

LocalPort cannot be changed once a connection is made. Any attempt to set this property when a connection is active will generate an error.

This property is useful when trying to connect to services that require a trusted port on the client side.

OutputData Property (MLLPClient Component)

The raw HL7 data received.

Syntax

public string OutputData { get; }
public byte[] OutputDataB { get; }

Public ReadOnly Property OutputData As String
Public ReadOnly Property OutputDataB As Byte()

Default Value

""

Remarks

This property holds the raw HL7 data received from the MLLP server.

Note that the component will store output data in one of the following places, choosing the first one that is valid:

This property is read-only and not available at design time.

OutputFileName Property (MLLPClient Component)

The path of a file in which to store received HL7 data.

Syntax

public string OutputFileName { get; set; }

Public Property OutputFileName As String

Default Value

""

Remarks

This property is used to specify a path to a file in which to store HL7 data received from the MLLP server.

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 SetOutputStream method.
  • A file whose path has been set to the OutputFileName property.
  • The OutputData property.

This property is not available at design time.

RemoteHost Property (MLLPClient Component)

This property includes the address of the remote host. Domain names are resolved to IP addresses.

Syntax

public string RemoteHost { get; set; }

Public Property RemoteHost As String

Default Value

""

Remarks

This property specifies the IP address (IP number in dotted internet format) or the domain name of the remote host. It is set before a connection is attempted and cannot be changed once a connection is established.

If this property is set to a domain name, a DNS request is initiated, and upon successful termination of the request, this property is set to the corresponding address. If the search is not successful, an error is returned.

If the component is configured to use a SOCKS firewall, the value assigned to this property may be preceded with an "*". If this is the case, the host name is passed to the firewall unresolved and the firewall performs the DNS resolution.

Example. Connecting:

TCPClientControl.RemoteHost = "MyHostNameOrIP" TCPClientControl.RemotePort = 777 TCPClientControl.Connected = true

RemotePort Property (MLLPClient Component)

This property includes the Transmission Control Protocol (TCP) port in the remote host.

Syntax

public int RemotePort { get; set; }

Public Property RemotePort As Integer

Default Value

0

Remarks

This property specifies a service port on the remote host to connect to.

A valid port number (a value between 1 and 65535) is required for the connection to take place. The property must be set before a connection is attempted and cannot be changed once a connection is established. Any attempt to change this property while connected will fail with an error.

SSLAcceptServerCert Property (MLLPClient Component)

Instructs the component to unconditionally accept the server certificate that matches the supplied certificate.

Syntax

public Certificate SSLAcceptServerCert { get; set; }

Public Property SSLAcceptServerCert As Certificate

Remarks

If it finds any issues with the certificate presented by the server, the component will normally terminate the connection with an error.

You may override this behavior by supplying a value for SSLAcceptServerCert. If the certificate supplied in SSLAcceptServerCert is the same as the certificate presented by the server, then the server certificate is accepted unconditionally, and the connection will continue normally.

Note: This functionality is provided only for cases in which you otherwise know that you are communicating with the right server. If used improperly, this property may create a security breach. Use it at your own risk.

Please refer to the Certificate type for a complete list of fields.

SSLCert Property (MLLPClient Component)

The certificate to be used during Secure Sockets Layer (SSL) negotiation.

Syntax

public Certificate SSLCert { get; set; }

Public Property SSLCert As Certificate

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 field to the encoded certificate. To select a certificate, use the store and subject fields.

Please refer to the Certificate type for a complete list of fields.

SSLEnabled Property (MLLPClient Component)

This property indicates whether Transport Layer Security/Secure Sockets Layer (TLS/SSL) is enabled.

Syntax

public bool SSLEnabled { get; set; }

Public Property SSLEnabled As Boolean

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.

SSLServerCert Property (MLLPClient Component)

The server certificate for the last established connection.

Syntax

public Certificate SSLServerCert { get; }

Public ReadOnly Property SSLServerCert As Certificate

Remarks

This property contains the server certificate for the last established connection.

SSLServerCert is reset every time a new connection is attempted.

This property is read-only.

Please refer to the Certificate type for a complete list of fields.

Timeout Property (MLLPClient Component)

This property includes the timeout for the component.

Syntax

public int Timeout { get; set; }

Public Property Timeout As Integer

Default Value

60

Remarks

This property defines the timeout when sending data. When SSLEnabled is False a value of 0 means data will be sent asynchronously and a positive value means data is sent synchronously. When SSLEnabled is True all data is sent synchronously regardless of the Timeout value. Please see the notes below for details.

Plaintext

If the Timeout property is set to 0, all operations return immediately, potentially failing with a WOULDBLOCK error if data cannot be sent immediately.

If Timeout is set to a positive value, data is sent in a blocking manner and the component will wait for the operation to complete before returning control. The component will handle any potential WOULDBLOCK errors internally and automatically retry the operation for a maximum of Timeout seconds.

SSL

If the Timeout property is set to 0, all operations will run uninterrupted until successful completion or an error condition is encountered.

If Timeout is set to a positive value, the component will wait for the operation to complete before returning control.

Additional Notes

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 for the Timeout property is 60 seconds.

Version Property (MLLPClient Component)

The MLLP version to use.

Syntax

public MLLPClientVersions Version { get; set; }

enum MLLPClientVersions {
  mvVersion1,
  mvVersion2
}

Public Property Version As MllpclientVersions

Enum MLLPClientVersions
  mvVersion1
  mvVersion2
End Enum

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 and AckOut events will never fire.

This property is not available at design time.

Config Method (MLLPClient Component)

Sets or retrieves a configuration setting.

Syntax

public string Config(string configurationString);

Async Version
public async Task<string> Config(string configurationString);
public async Task<string> Config(string configurationString, CancellationToken cancellationToken);

Public Function Config(ByVal ConfigurationString As String) As String

Async Version
Public Function Config(ByVal ConfigurationString As String) As Task(Of String)
Public Function Config(ByVal ConfigurationString As String, cancellationToken As CancellationToken) As Task(Of String)

Remarks

Config is a generic method available in every component. It is used to set and retrieve configuration settings 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, you must call Config("PROPERTY"). The value will be returned as a string.

Connect Method (MLLPClient Component)

This method connects to a remote host.

Syntax

public void Connect();

Async Version
public async Task Connect();
public async Task Connect(CancellationToken cancellationToken);

Public Sub Connect()

Async Version
Public Sub Connect() As Task
Public Sub Connect(cancellationToken As CancellationToken) As Task

Remarks

This method connects to the remote host specified by RemoteHost and RemotePort. For instance: component.RemoteHost = "MyHostNameOrIP"; component.RemotePort = 7777; component.Connect();

Disconnect Method (MLLPClient Component)

This method disconnects from the remote host.

Syntax

public void Disconnect();

Async Version
public async Task Disconnect();
public async Task Disconnect(CancellationToken cancellationToken);

Public Sub Disconnect()

Async Version
Public Sub Disconnect() As Task
Public Sub Disconnect(cancellationToken As CancellationToken) As Task

Remarks

This method disconnects from the remote host. Calling this method is equivalent to setting the Connected property to False.

DoEvents Method (MLLPClient Component)

This method processes events from the internal message queue.

Syntax

public void DoEvents();

Async Version
public async Task DoEvents();
public async Task DoEvents(CancellationToken cancellationToken);

Public Sub DoEvents()

Async Version
Public Sub DoEvents() As Task
Public Sub DoEvents(cancellationToken As CancellationToken) As Task

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 (MLLPClient Component)

This method interrupts the current action.

Syntax

public void Interrupt();

Async Version
public async Task Interrupt();
public async Task Interrupt(CancellationToken cancellationToken);

Public Sub Interrupt()

Async Version
Public Sub Interrupt() As Task
Public Sub Interrupt(cancellationToken As CancellationToken) As Task

Remarks

This method interrupts the current action. If you use SendFile to upload a file, the component will run synchronously until the upload is completed. This method will allow you to stop the file from uploading without disconnecting from the host.

Reset Method (MLLPClient Component)

This method will reset the component.

Syntax

public void Reset();

Async Version
public async Task Reset();
public async Task Reset(CancellationToken cancellationToken);

Public Sub Reset()

Async Version
Public Sub Reset() As Task
Public Sub Reset(cancellationToken As CancellationToken) As Task

Remarks

This method will reset the component's properties to their default values.

Send Method (MLLPClient Component)

Sends HL7 data to the MLLP server.

Syntax

public void Send();

Async Version
public async Task Send();
public async Task Send(CancellationToken cancellationToken);

Public Sub Send()

Async Version
Public Sub Send() As Task
Public Sub Send(cancellationToken As CancellationToken) As Task

Remarks

The Send method sends the string or byte array in InputData to the specified server. Alternatively, you can set InputFileName to the name of a file with HL7 contents.

Before calling this method, set the RemoteHost and RemotePort properties to the server credentials and Connect or set Connected to True.

Sending Data Example mllpClient.InputData = "HL7Data"; mllpClient.Send();

If the data was received by the server, the component will receive a response and the AckIn event will fire.

SetInputStream Method (MLLPClient Component)

Specifies a stream containing HL7 data to send.

Syntax

public void SetInputStream(System.IO.Stream inputStream);

Async Version
public async Task SetInputStream(System.IO.Stream inputStream);
public async Task SetInputStream(System.IO.Stream inputStream, CancellationToken cancellationToken);

Public Sub SetInputStream(ByVal InputStream As System.IO.Stream)

Async Version
Public Sub SetInputStream(ByVal InputStream As System.IO.Stream) As Task
Public Sub SetInputStream(ByVal InputStream As System.IO.Stream, cancellationToken As CancellationToken) As Task

Remarks

This method is used to specify a stream containing HL7 data to send when the Send method is called.

Note that the component checks the following places for input data, in order, when Send is called. Input data is sent from the first place it is found:

  • A stream specified using the SetInputStream method.
  • The contents of a file whose path has been set to the InputFileName property.
  • The data set to the InputData property.

SetOutputStream Method (MLLPClient Component)

Specifies a stream to which received HL7 data should be written.

Syntax

public void SetOutputStream(System.IO.Stream outputStream);

Async Version
public async Task SetOutputStream(System.IO.Stream outputStream);
public async Task SetOutputStream(System.IO.Stream outputStream, CancellationToken cancellationToken);

Public Sub SetOutputStream(ByVal OutputStream As System.IO.Stream)

Async Version
Public Sub SetOutputStream(ByVal OutputStream As System.IO.Stream) As Task
Public Sub SetOutputStream(ByVal OutputStream As System.IO.Stream, cancellationToken As CancellationToken) As Task

Remarks

This method is used to specify a stream to which HL7 data received from the MLLP server 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 SetOutputStream method.
  • A file whose path has been set to the OutputFileName property.
  • The OutputData property.

AckIn Event (MLLPClient Component)

Fires immediately after receiving an acknowledgement from the server.

Syntax

public event OnAckInHandler OnAckIn;

public delegate void OnAckInHandler(object sender, MLLPClientAckInEventArgs e);

public class MLLPClientAckInEventArgs : EventArgs {
  public bool Accepted { get; }
}

Public Event OnAckIn As OnAckInHandler

Public Delegate Sub OnAckInHandler(sender As Object, e As MLLPClientAckInEventArgs)

Public Class MLLPClientAckInEventArgs Inherits EventArgs
  Public ReadOnly Property Accepted As Boolean
End Class

Remarks

This event fires immediately after receiving an acknowledgement (positive or negative) from the MLLP server.

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 (MLLPClient Component)

Fires immediately before sending an acknowledgement to the server.

Syntax

public event OnAckOutHandler OnAckOut;

public delegate void OnAckOutHandler(object sender, MLLPClientAckOutEventArgs e);

public class MLLPClientAckOutEventArgs : EventArgs {
  public bool Accept { get; set; }
}

Public Event OnAckOut As OnAckOutHandler

Public Delegate Sub OnAckOutHandler(sender As Object, e As MLLPClientAckOutEventArgs)

Public Class MLLPClientAckOutEventArgs Inherits EventArgs
  Public Property Accept As Boolean
End Class

Remarks

This event fires immediately before the component sends an acknowledgement to the MLLP server.

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 (MLLPClient Component)

Fired immediately after a connection completes (or fails).

Syntax

public event OnConnectedHandler OnConnected;

public delegate void OnConnectedHandler(object sender, MLLPClientConnectedEventArgs e);

public class MLLPClientConnectedEventArgs : EventArgs {
  public int StatusCode { get; }
  public string Description { get; }
}

Public Event OnConnected As OnConnectedHandler

Public Delegate Sub OnConnectedHandler(sender As Object, e As MLLPClientConnectedEventArgs)

Public Class MLLPClientConnectedEventArgs Inherits EventArgs
  Public ReadOnly Property StatusCode As Integer
  Public ReadOnly Property Description As String
End Class

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 Transmission Control Protocol (TCP)/IP stack. Description contains a description of this code. The value of StatusCode is equal to the value of the error.

Please refer to the Error Codes section for more information.

ConnectionStatus Event (MLLPClient Component)

Fired to indicate changes in the connection state.

Syntax

public event OnConnectionStatusHandler OnConnectionStatus;

public delegate void OnConnectionStatusHandler(object sender, MLLPClientConnectionStatusEventArgs e);

public class MLLPClientConnectionStatusEventArgs : EventArgs {
  public string ConnectionEvent { get; }
  public int StatusCode { get; }
  public string Description { get; }
}

Public Event OnConnectionStatus As OnConnectionStatusHandler

Public Delegate Sub OnConnectionStatusHandler(sender As Object, e As MLLPClientConnectionStatusEventArgs)

Public Class MLLPClientConnectionStatusEventArgs Inherits EventArgs
  Public ReadOnly Property ConnectionEvent As String
  Public ReadOnly Property StatusCode As Integer
  Public ReadOnly Property Description As String
End Class

Remarks

This event is fired when the connection state changes: for example, completion of a firewall or proxy connection or completion of a security handshake.

The ConnectionEvent parameter indicates the type of connection event. Values may include the following:

Firewall connection complete.
Secure Sockets Layer (SSL) or S/Shell handshake complete (where applicable).
Remote host connection complete.
Remote host disconnected.
SSL or S/Shell connection broken.
Firewall host disconnected.
StatusCode has the error code returned by the Transmission Control Protocol (TCP)/IP stack. Description contains a description of this code. The value of StatusCode is equal to the value of the error.

Disconnected Event (MLLPClient Component)

Fired when a connection is closed.

Syntax

public event OnDisconnectedHandler OnDisconnected;

public delegate void OnDisconnectedHandler(object sender, MLLPClientDisconnectedEventArgs e);

public class MLLPClientDisconnectedEventArgs : EventArgs {
  public int StatusCode { get; }
  public string Description { get; }
}

Public Event OnDisconnected As OnDisconnectedHandler

Public Delegate Sub OnDisconnectedHandler(sender As Object, e As MLLPClientDisconnectedEventArgs)

Public Class MLLPClientDisconnectedEventArgs Inherits EventArgs
  Public ReadOnly Property StatusCode As Integer
  Public ReadOnly Property Description As String
End Class

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 Transmission Control Protocol (TCP/IP) subsystem. Description contains a description of this code. The value of StatusCode is equal to the value of the TCP/IP error.

Please refer to the Error Codes section for more information.

EndTransfer Event (MLLPClient Component)

Fires after incoming HL7 data finishes transferring.

Syntax

public event OnEndTransferHandler OnEndTransfer;

public delegate void OnEndTransferHandler(object sender, MLLPClientEndTransferEventArgs e);

public class MLLPClientEndTransferEventArgs : EventArgs {
}

Public Event OnEndTransfer As OnEndTransferHandler

Public Delegate Sub OnEndTransferHandler(sender As Object, e As MLLPClientEndTransferEventArgs)

Public Class MLLPClientEndTransferEventArgs Inherits EventArgs
End Class

Remarks

This event fires after incoming HL7 data finishes transferring, immediately before the AckOut event is fired.

Error Event (MLLPClient Component)

Fired when information is available about errors during data delivery.

Syntax

public event OnErrorHandler OnError;

public delegate void OnErrorHandler(object sender, MLLPClientErrorEventArgs e);

public class MLLPClientErrorEventArgs : EventArgs {
  public int ErrorCode { get; }
  public string Description { get; }
}

Public Event OnError As OnErrorHandler

Public Delegate Sub OnErrorHandler(sender As Object, e As MLLPClientErrorEventArgs)

Public Class MLLPClientErrorEventArgs Inherits EventArgs
  Public ReadOnly Property ErrorCode As Integer
  Public ReadOnly Property Description As String
End Class

Remarks

The Error event is fired in case of exceptional conditions during message processing. Normally the component throws an exception.

The ErrorCode parameter contains an error code, and the Description parameter contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to the Error Codes section.

Log Event (MLLPClient Component)

Provides logging information.

Syntax

public event OnLogHandler OnLog;

public delegate void OnLogHandler(object sender, MLLPClientLogEventArgs e);

public class MLLPClientLogEventArgs : EventArgs {
  public int LogLevel { get; }
  public string Message { get; }
  public string LogType { get; }
}

Public Event OnLog As OnLogHandler

Public Delegate Sub OnLogHandler(sender As Object, e As MLLPClientLogEventArgs)

Public Class MLLPClientLogEventArgs Inherits EventArgs
  Public ReadOnly Property LogLevel As Integer
  Public ReadOnly Property Message As String
  Public ReadOnly Property LogType As String
End Class

Remarks

This event fires when processing messages and provides logging information. The LogLevel configuration setting specifies the level of detail that is logged.

LogType specifies the type of log message. Possible values are:

  • INFO
  • VERBOSE
  • DEBUG

LogMessage is the log message.

SSLServerAuthentication Event (MLLPClient Component)

Fired after the server presents its certificate to the client.

Syntax

public event OnSSLServerAuthenticationHandler OnSSLServerAuthentication;

public delegate void OnSSLServerAuthenticationHandler(object sender, MLLPClientSSLServerAuthenticationEventArgs e);

public class MLLPClientSSLServerAuthenticationEventArgs : EventArgs {
  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; }
}

Public Event OnSSLServerAuthentication As OnSSLServerAuthenticationHandler

Public Delegate Sub OnSSLServerAuthenticationHandler(sender As Object, e As MLLPClientSSLServerAuthenticationEventArgs)

Public Class MLLPClientSSLServerAuthenticationEventArgs Inherits EventArgs
  Public ReadOnly Property CertEncoded As String
  Public ReadOnly Property CertEncodedB As Byte()
  Public ReadOnly Property CertSubject As String
  Public ReadOnly Property CertIssuer As String
  Public ReadOnly Property Status As String
  Public Property Accept As Boolean
End Class

Remarks

During this event, the client can decide whether or not to continue with the connection process. The Accept parameter is a recommendation on whether to continue or 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). If it is decided to continue, you can override and accept the certificate by setting the Accept parameter to True.

SSLStatus Event (MLLPClient Component)

Fired when secure connection progress messages are available.

Syntax

public event OnSSLStatusHandler OnSSLStatus;

public delegate void OnSSLStatusHandler(object sender, MLLPClientSSLStatusEventArgs e);

public class MLLPClientSSLStatusEventArgs : EventArgs {
  public string Message { get; }
}

Public Event OnSSLStatus As OnSSLStatusHandler

Public Delegate Sub OnSSLStatusHandler(sender As Object, e As MLLPClientSSLStatusEventArgs)

Public Class MLLPClientSSLStatusEventArgs Inherits EventArgs
  Public ReadOnly Property Message As String
End Class

Remarks

The event is fired for informational and logging purposes only. This event tracks the progress of the connection.

StartTransfer Event (MLLPClient Component)

Fires before incoming HL7 data begins transferring.

Syntax

public event OnStartTransferHandler OnStartTransfer;

public delegate void OnStartTransferHandler(object sender, MLLPClientStartTransferEventArgs e);

public class MLLPClientStartTransferEventArgs : EventArgs {
}

Public Event OnStartTransfer As OnStartTransferHandler

Public Delegate Sub OnStartTransferHandler(sender As Object, e As MLLPClientStartTransferEventArgs)

Public Class MLLPClientStartTransferEventArgs Inherits EventArgs
End Class

Remarks

This event fires before incoming HL7 data begins transferring.

Transfer Event (MLLPClient Component)

Fires during incoming data transfer.

Syntax

public event OnTransferHandler OnTransfer;

public delegate void OnTransferHandler(object sender, MLLPClientTransferEventArgs e);

public class MLLPClientTransferEventArgs : EventArgs {
  public long BytesTransferred { get; }
  public string Data { get; }
  public byte[] DataB { get; }
}

Public Event OnTransfer As OnTransferHandler

Public Delegate Sub OnTransferHandler(sender As Object, e As MLLPClientTransferEventArgs)

Public Class MLLPClientTransferEventArgs Inherits EventArgs
  Public ReadOnly Property BytesTransferred As Long
  Public ReadOnly Property Data As String
  Public ReadOnly Property DataB As Byte()
End Class

Remarks

This event fires one or more times while incoming 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
  • ExpirationDate
  • ExtendedKeyUsage
  • Fingerprint
  • FingerprintSHA1
  • FingerprintSHA256
  • Issuer
  • PrivateKey
  • PrivateKeyAvailable
  • PrivateKeyContainer
  • PublicKey
  • PublicKeyAlgorithm
  • PublicKeyLength
  • SerialNumber
  • SignatureAlgorithm
  • Store
  • StorePassword
  • StoreType
  • SubjectAltNames
  • ThumbprintMD5
  • ThumbprintSHA1
  • ThumbprintSHA256
  • Usage
  • UsageFlags
  • Version
  • Subject
  • 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 may be available but not exportable. In this case, PrivateKey returns an empty string.

    PrivateKeyAvailable
    bool (read-only)
    Default: False

    Whether a PrivateKey is available for the selected certificate. If 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 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 field denotes the type of the certificate store specified by Store. If the store is password-protected, specify the password in StorePassword.

    Store is used in conjunction with the Subject field to specify client certificates. If Store has a value, and Subject or Encoded is set, a search for a certificate is initiated. Please see the 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:

    MYA certificate store holding personal certificates with their associated private keys.
    CACertifying authority certificates.
    ROOTRoot 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 field denotes the type of the certificate store specified by Store. If the store is password-protected, specify the password in StorePassword.

    Store is used in conjunction with the Subject field to specify client certificates. If Store has a value, and Subject or Encoded is set, a search for a certificate is initiated. Please see the 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:

    MYA certificate store holding personal certificates with their associated private keys.
    CACertifying authority certificates.
    ROOTRoot 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:

    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, the necessary data must first be collected using the CertMgr component. The ListStoreCertificates method may be called after setting CertStoreType to cstPKCS11, CertStorePassword to the PIN, and CertStore to the full path of the PKCS#11 DLL. The certificate information returned in the CertList event's CertEncoded parameter may be saved for later use.

    When using a certificate, pass the previously saved security key information as the Store and set StorePassword to the PIN.

    Code Example. SSH Authentication with Security Key: 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);

    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.

    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 is a combination of the following flags:

    0x80Digital Signature
    0x40Non-Repudiation
    0x20Key Encipherment
    0x10Data Encipherment
    0x08Key Agreement
    0x04Certificate Signing
    0x02CRL Signing
    0x01Encipher Only

    Please see the Usage field for a text representation of 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=support@nsoftware.com". Common fields and their meanings are as follows:

    FieldMeaning
    CNCommon Name. This is commonly a hostname like www.server.com.
    OOrganization
    OUOrganizational Unit
    LLocality
    SState
    CCountry
    EEmail 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 and Subject fields also may be used to specify a certificate.

    When Encoded is set, a search is initiated in the current Store for the private key of the certificate. If the key is found, Subject is updated to reflect the full subject of the selected certificate; otherwise, 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 and Subject fields also may be used to specify a certificate.

    When Encoded is set, a search is initiated in the current Store for the private key of the certificate. If the key is found, Subject is updated to reflect the full subject of the selected certificate; otherwise, Subject is set to an empty string.

    Constructors

    public Certificate();

    Public Certificate()

    Creates a instance whose properties can be set. This is useful for use with when generating new certificates. 

    public Certificate(string certificateFile);

    Public Certificate(ByVal CertificateFile As String)

    Opens CertificateFile and reads out the contents as an X.509 public key. 

    public Certificate(byte[] encoded);

    Public Certificate(ByVal Encoded As Byte())

    Parses Encoded as an X.509 public key. 

    public Certificate(CertStoreTypes storeType, string store, string storePassword, string subject);

    Public Certificate(ByVal StoreType As CertStoreTypes, ByVal Store As String, ByVal StorePassword As String, ByVal Subject As String)

    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. 

    public Certificate(CertStoreTypes storeType, string store, string storePassword, string subject, string configurationString);

    Public Certificate(ByVal StoreType As CertStoreTypes, ByVal Store As String, ByVal StorePassword As String, ByVal Subject As String, ByVal ConfigurationString As String)

    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. 

    public Certificate(CertStoreTypes storeType, string store, string storePassword, byte[] encoded);

    Public Certificate(ByVal StoreType As CertStoreTypes, ByVal Store As String, ByVal StorePassword As String, ByVal Encoded As Byte())

    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. 

    public Certificate(CertStoreTypes storeType, byte[] store, string storePassword, string subject);

    Public Certificate(ByVal StoreType As CertStoreTypes, ByVal Store As Byte(), ByVal StorePassword As String, ByVal Subject As String)

    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. 

    public Certificate(CertStoreTypes storeType, byte[] store, string storePassword, string subject, string configurationString);

    Public Certificate(ByVal StoreType As CertStoreTypes, ByVal Store As Byte(), ByVal StorePassword As String, ByVal Subject As String, ByVal ConfigurationString As String)

    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. 

    public Certificate(CertStoreTypes storeType, byte[] store, string storePassword, byte[] encoded);

    Public Certificate(ByVal StoreType As CertStoreTypes, ByVal Store As Byte(), ByVal StorePassword As String, ByVal Encoded As Byte())

    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.

    Firewall Type

    The firewall the component will connect through.

    Remarks

    When connecting through a firewall, this type is used to specify different properties of the firewall, such as the firewall Host and the FirewallType.

    The following fields are available:
  • AutoDetect
  • FirewallType
  • Host
  • Password
  • Port
  • User

    • Fields

    AutoDetect
    bool
    Default: False

    Whether to automatically detect and use firewall system settings, if available.

    FirewallType
    FirewallTypes
    Default: 0

    The type of firewall to connect through. The applicable values are as follows:

    fwNone (0)No firewall (default setting).
    fwTunnel (1)Connect through a tunneling proxy. Port is set to 80.
    fwSOCKS4 (2)Connect through a SOCKS4 Proxy. Port is set to 1080.
    fwSOCKS5 (3)Connect through a SOCKS5 Proxy. Port is set to 1080.
    fwSOCKS4A (10)Connect through a SOCKS4A Proxy. Port is set to 1080.

    Host
    string
    Default: ""

    The name or IP address of the firewall (optional). If a Host is given, the requested connections will be authenticated through the specified firewall when connecting.

    If this field is set to a Domain Name, a DNS request is initiated. Upon successful termination of the request, this field is set to the corresponding address. If the search is not successful, the component throws an exception.

    Password
    string
    Default: ""

    A password if authentication is to be used when connecting through the firewall. If Host is specified, the User and Password fields are used to connect and authenticate to the given firewall. If the authentication fails, the component throws an exception.

    Port
    int
    Default: 0

    The Transmission Control Protocol (TCP) port for the firewall Host. See the description of the Host field for details.

    Note: This field is set automatically when FirewallType is set to a valid value. See the description of the FirewallType field for details.

    User
    string
    Default: ""

    A username if authentication is to be used when connecting through a firewall. If Host is specified, this field and the Password field are used to connect and authenticate to the given Firewall. If the authentication fails, the component throws an exception.

    Constructors

    public Firewall();

    Public Firewall()

    Config Settings (MLLPClient 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 method.

    MLLPCLIENT 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 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 or EOLChar (after receiving a 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 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.

    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 is given, requested connections will be authenticated through the specified firewall when connecting.

    If the FirewallHost setting is set to a Domain Name, a DNS request is initiated. Upon successful termination of the request, the 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.

    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 is specified, the FirewallUser and 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 is set automatically when 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:

    0No firewall (default setting).
    1Connect through a tunneling proxy. FirewallPort is set to 80.
    2Connect through a SOCKS4 Proxy. FirewallPort is set to 1080.
    3Connect through a SOCKS5 Proxy. FirewallPort is set to 1080.
    10Connect through a SOCKS4A Proxy. 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 is specified, the FirewallUser and 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 will automatically be set to True. A TCP keep-alive packet will be sent after a period of inactivity as defined by 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 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 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 is a positive value, the system will attempt to send pending data until the specified 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 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 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 after the connection is established.

    LocalPort 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 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 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 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 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.nsoftware.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 and 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 False and NTLM V1 will be used. Set this to True to use NTLM V2.

    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 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 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: 

    -----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 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 is currently not supported. This functionality is instead made available through the 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 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 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: 

    -----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 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: 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 Internalinclude the following: 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), only the following cipher suites are supported:

    • TLS_AES_256_GCM_SHA384
    • TLS_CHACHA20_POLY1305_SHA256
    • TLS_AES_128_GCM_SHA256

    SSLEnabledCipherSuites is used together with 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:

    TLS1.312288 (Hex 3000)
    TLS1.23072 (Hex C00) (Default - Client and Server)
    TLS1.1768 (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 use the internal TLS implementation when the SSLProvider is set to Automatic for all editions.

    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 and other similar SSL configuration settings are not supported.
    • If 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: 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: 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: 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: 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: 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: 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:

    0x00000001Ignore time validity status of certificate.
    0x00000002Ignore time validity status of CTL.
    0x00000004Ignore non-nested certificate times.
    0x00000010Allow unknown certificate authority.
    0x00000020Ignore wrong certificate usage.
    0x00000100Ignore unknown certificate revocation status.
    0x00000200Ignore unknown CTL signer revocation status.
    0x00000400Ignore unknown certificate authority revocation status.
    0x00000800Ignore unknown root revocation status.
    0x00008000Allow test root certificate.
    0x00004000Trust test root certificate.
    0x80000000Ignore 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 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: 

    -----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 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: 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 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

    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)

    Socket Config Settings

    AbsoluteTimeout:   Determines whether timeouts are inactivity timeouts or absolute timeouts.

    If 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 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.

    This setting only works on these components: AS3Receiver, AS3Sender, Atom, Client(3DS), FTP, FTPServer, IMAP, OFTPClient, SSHClient, SCP, Server(3DS), Sexec, SFTP, SFTPServer, SSHServer, TCPClient, TCPServer.

    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 article.

    Note: This setting is applicable only on Windows.

    Note: Enabling FIPS compliance requires a special license; please contact 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.

    If using the .NET Standard Library, this setting will be true on all platforms. The .NET Standard library does not support using the system security libraries.

    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 (MLLPClient Component)

    MLLPClient 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 at this time. A connection is in progress.
    107   You cannot change the LocalHost at this time. A connection is in progress.
    112   You cannot change 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).