# Struct ipworks::DTLSServer The DTLSServer struct provides server-side functionality for secure UDP communication utilizing the Datagram Transport Layer Security (DTLS) protocol. ## Syntax ```text ipworks::DTLSServer ``` ## Remarks The DTLSServer struct functions as a server that facilitates incoming DTLS connections and offers a convenient means of transmitting and receiving datagrams over the established, secure connections. ### Getting Started First, a valid certificate must be selected before the server can start listening for incoming connections. The certificate can be specified via the ssl_cert. Note the certificate must contain a private key. After doing so, calling [start_listening](#start_listening-method-dtlsserver-struct) will cause the struct to start listening for incoming connections. The struct will listen on the interface defined by [local_host](#local_host-property-dtlsserver-struct) and [local_port](#local_port-property-dtlsserver-struct), if specified. Otherwise, these values will be set by the struct. If applicable, these values must be set before calling [start_listening](#start_listening-method-dtlsserver-struct). For example: ```csharp //dtlsserver.LocalHost = "some_ip_address"; //dtlsserver.LocalPort = 1234; dtlsserver.SSLCert = new Certificate("/path/to/cert.pfx", CertStoreTypes.cstPFXFile, "cert_password", "cert_subject"); dtlsserver.StartListening(); Console.WriteLine("Listening on: " + dtlsserver.LocalHost + ":" + dtlsserver.LocalPort); while (dtlsserver.Listening) { dtlsserver.DoEvents(); } ``` ### Handling Incoming Connections Once successfully listening, the struct can now accept (or reject) incoming connections. The first indicator of an incoming connection will be through the [on_connection_request](#on_connection_request-event-dtlsserver-struct) event. Here, the connection's originating address and port can be queried. By default, the struct will accept all incoming connections, but this behavior can be overridden within this event. Assuming the connection is accepted, the DTLS handshake will proceed. Relevant handshake details will be reported by the [on_ssl_status](#on_ssl_status-event-dtlsserver-struct) event. By default, the client is not required to present a certificate to the server. To force this, the [ssl_authenticate_clients](#ssl_authenticate_clients-property-dtlsserver-struct) property can be enabled. When enabled, the client's presented certificate will be available within the [on_ssl_client_authentication](#on_ssl_client_authentication-event-dtlsserver-struct) event, where the server can again choose to accept (or reject) incoming connections. Once the connection is complete (or fails), the [on_connected](#on_connected-event-dtlsserver-struct) event will fire. Note that this event will fire if a connection succeeds or fails. If successful, the event will fire with a *StatusCode* of 0. If this value is non-zero, it indicates the connection was unsuccessful. The *Description* parameter will contain relevant details. After a successful connection, relevant connection-specific details will be available within the **Connection*** properties. Each connection will be assigned a unique *ConnectionId*, which can be acquired for a given connection within the [on_connected](#on_connected-event-dtlsserver-struct) event. For example: ```csharp dtlsserver.OnConnected += (o, e) => { if (e.StatusCode == 0) { Console.WriteLine("Successful connection from " + e.SourceAddr + ":" + e.SourcePort); Console.WriteLine("ConnectionId: " + e.ConnectionId); } else { Console.WriteLine("Connection failed from " + e.SourceAddr + ":" + e.SourcePort); Console.WriteLine("Error code: " + e.StatusCode); Console.WriteLine("Error description: " + e.Description); } }; dtlsserver.OnSSLClientAuthentication += (o, e) => { if (e.Accept) return; Console.Write("Client provided the following certificate:\nIssuer: " + e.CertIssuer + "\nSubject: " + e.CertSubject + "\n"); Console.Write("The following problems have been determined for this certificate: " + e.Status + "\n"); Console.Write("Would you like to accept anyways? [y/n] "); if (Console.Read() == 'y') e.Accept = true; }; dtlsserver.SSLCert = new Certificate("/path/to/cert.pfx", CertStoreTypes.cstPFXFile, "cert_password", "cert_subject"); dtlsserver.SSLAuthenticateClients = true; dtlsserver.StartListening(); Console.WriteLine("Listening on: " + dtlsserver.LocalHost + ":" + dtlsserver.LocalPort); while (dtlsserver.Listening) { dtlsserver.DoEvents(); } ``` ### Sending and Receiving Data The struct can send data to individual connections, specified by the *ConnectionId* parameter, via the [send_bytes](#send_bytes-method-dtlsserver-struct) and [send_text](#send_text-method-dtlsserver-struct) methods. While a connection is active, incoming data from a connection will be available within the [on_data_in](#on_data_in-event-dtlsserver-struct) event. Note that this event is non-reentrant, and it is recommended to offload time-consuming operations to ensure the best performance. If required, the [pause_data](#pause_data-method-dtlsserver-struct) method can be called, disabling the reception of incoming data from a particular connection. Data reception can later be enabled via the [process_data](#process_data-method-dtlsserver-struct) method. Note that if this reception is disabled for a connection, the connection may continue sending data, which will remain unprocessed by the struct. In this case, the underlying socket buffer may be filled. This can result in possible data loss originating from this connection. Please use these methods with caution. The complete process may look like the following: ```csharp dtlsserver.OnDataIn += (o, e) => { Console.WriteLine("Packet received from: " + e.ConnectionId); Console.WriteLine("Packet: " + e.Datagram); }; dtlsserver.SSLCert = new Certificate("/path/to/cert.pfx", CertStoreTypes.cstPFXFile, "cert_password", "cert_subject"); dtlsserver.StartListening(); Console.WriteLine("Listening on: " + dtlsserver.LocalHost + ":" + dtlsserver.LocalPort); ... ... ... // Broadcast data foreach (DTLSConnection c in dtlsserver.Connections.Values) { dtlsserver.SendText(c.ConnectionId, "Hello world!"); } ``` ### Removing Connections To remove a connection, [disconnect](#disconnect-method-dtlsserver-struct) must be called with the corresponding *ConnectionId*. In order to remove inactive connections, the [default_idle_timeout](#default_idle_timeout-property-dtlsserver-struct) property can be set accordingly. By default, this property is set to *0*, and idle connections are not removed automatically. When this property is set to a positive value, this will automatically remove connections that are idle for a specified amount of time. NOTE: For [default_idle_timeout](#default_idle_timeout-property-dtlsserver-struct) to work as intended, [do_events](#do_events-method-dtlsserver-struct) must be called frequently in **both** console and form-based applications (e.g., using a loop or timer). Finally, once a connection ends, [on_disconnected](#on_disconnected-event-dtlsserver-struct) will fire. In the case a connection ends and an error is encountered, the *StatusCode* and *Description* parameters will contain relevant details regarding the error. The connection will be removed from the **Connection*** properties. For example: ```csharp dtlsserver.OnDisconnected += (o, e) => { if (e.StatusCode == 0) { Console.WriteLine("Connection removed: " + e.ConnectionId); } else { Console.WriteLine("Connection removed: " + e.ConnectionId); Console.WriteLine("Error code: " + e.StatusCode); Console.WriteLine("Error description: " + e.Description); } }; dtlsserver.DefaultIdleTimeout = 60; // Remove connections inactive for 60 seconds dtlsserver.StartListening(); Console.WriteLine("Listening on: " + dtlsserver.LocalHost + ":" + dtlsserver.LocalPort); while (dtlsserver.Listening) { dtlsserver.DoEvents(); } ``` ### Additional Information To support [default_idle_timeout](#default_idle_timeout-property-dtlsserver-struct) and [keep_alive](#keep_alive-property-dtlsserver-struct) functionality, it is important to note that [do_events](#do_events-method-dtlsserver-struct) **must** be called regularly in both console and form-based applications. For [default_idle_timeout](#default_idle_timeout-property-dtlsserver-struct), [do_events](#do_events-method-dtlsserver-struct) must be called frequently to ensure that idle connections are handled and removed in a timely manner. For [keep_alive](#keep_alive-property-dtlsserver-struct), [do_events](#do_events-method-dtlsserver-struct) must be called frequently to ensure the struct sends keep-alive (or Heartbeat) packets to existing connections in a timely manner. In form-based applications, this does not apply if [default_idle_timeout](#default_idle_timeout-property-dtlsserver-struct) is set to *0* and [keep_alive](#keep_alive-property-dtlsserver-struct) is *False*. ### Object Lifetime The *new()* method returns a mutable reference to a struct instance. The object itself is kept in the global list maintained by IPWorks. Due to this, the DTLSServer struct cannot be disposed of automatically. Please, call the *dispose(&mut; self)* method of DTLSServer when you have finished using the instance. ## Property List *The following is the full list of the properties of the struct with short descriptions. Click on the links for further details.* | | | | --- | --- | | [connection_count](#connection_count-property-dtlsserver-struct) | The number of records in the Connection arrays. | | [connection_id](#connection_id-property-dtlsserver-struct) | This property contains an identifier generated by the struct to identify each connection. | | [connection_local_host](#connection_local_host-property-dtlsserver-struct) | This property indicates the name of the local host or user-assigned IP interface through which connections are initiated or accepted. | | [connection_local_port](#connection_local_port-property-dtlsserver-struct) | This property indicates the UDP port on the local host or user-assigned IP interface through which connections are initiated or accepted. | | [connection_remote_host](#connection_remote_host-property-dtlsserver-struct) | This property indicates the IP address of the remote host through which the connection is coming. | | [connection_remote_port](#connection_remote_port-property-dtlsserver-struct) | This property indicates the UDP port on the remote host through which the connection is coming. | | [default_idle_timeout](#default_idle_timeout-property-dtlsserver-struct) | This property includes the default idle timeout for inactive clients. | | [keep_alive](#keep_alive-property-dtlsserver-struct) | When True, keep-alive functionality is enabled via the DTLS Heartbeat Extension. | | [listening](#listening-property-dtlsserver-struct) | This property indicates whether the struct is listening for incoming connections on LocalPort. | | [local_host](#local_host-property-dtlsserver-struct) | The name of the local host or user-assigned IP interface through which connections are initiated or accepted. | | [local_port](#local_port-property-dtlsserver-struct) | This property includes the User Datagram Protocol (UDP) port in the local host where the struct listens. | | [ssl_authenticate_clients](#ssl_authenticate_clients-property-dtlsserver-struct) | If set to True, the server asks the client(s) for a certificate. | | [ssl_cert_effective_date](#ssl_cert_effective_date-property-dtlsserver-struct) | The date on which this certificate becomes valid. | | [ssl_cert_expiration_date](#ssl_cert_expiration_date-property-dtlsserver-struct) | The date on which the certificate expires. | | [ssl_cert_extended_key_usage](#ssl_cert_extended_key_usage-property-dtlsserver-struct) | A comma-delimited list of extended key usage identifiers. | | [ssl_cert_fingerprint](#ssl_cert_fingerprint-property-dtlsserver-struct) | The hex-encoded, 16-byte MD5 fingerprint of the certificate. | | [ssl_cert_fingerprint_sha1](#ssl_cert_fingerprint_sha1-property-dtlsserver-struct) | The hex-encoded, 20-byte SHA-1 fingerprint of the certificate. | | [ssl_cert_fingerprint_sha256](#ssl_cert_fingerprint_sha256-property-dtlsserver-struct) | The hex-encoded, 32-byte SHA-256 fingerprint of the certificate. | | [ssl_cert_issuer](#ssl_cert_issuer-property-dtlsserver-struct) | The issuer of the certificate. | | [ssl_cert_private_key](#ssl_cert_private_key-property-dtlsserver-struct) | The private key of the certificate (if available). | | [ssl_cert_private_key_available](#ssl_cert_private_key_available-property-dtlsserver-struct) | Whether a PrivateKey is available for the selected certificate. | | [ssl_cert_private_key_container](#ssl_cert_private_key_container-property-dtlsserver-struct) | The name of the PrivateKey container for the certificate (if available). | | [ssl_cert_public_key](#ssl_cert_public_key-property-dtlsserver-struct) | The public key of the certificate. | | [ssl_cert_public_key_algorithm](#ssl_cert_public_key_algorithm-property-dtlsserver-struct) | The textual description of the certificate's public key algorithm. | | [ssl_cert_public_key_length](#ssl_cert_public_key_length-property-dtlsserver-struct) | The length of the certificate's public key (in bits). | | [ssl_cert_serial_number](#ssl_cert_serial_number-property-dtlsserver-struct) | The serial number of the certificate encoded as a string. | | [ssl_cert_signature_algorithm](#ssl_cert_signature_algorithm-property-dtlsserver-struct) | The text description of the certificate's signature algorithm. | | [ssl_cert_store](#ssl_cert_store-property-dtlsserver-struct) | The name of the certificate store for the client certificate. | | [ssl_cert_store_password](#ssl_cert_store_password-property-dtlsserver-struct) | If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store. | | [ssl_cert_store_type](#ssl_cert_store_type-property-dtlsserver-struct) | The type of certificate store for this certificate. | | [ssl_cert_subject_alt_names](#ssl_cert_subject_alt_names-property-dtlsserver-struct) | Comma-separated lists of alternative subject names for the certificate. | | [ssl_cert_thumbprint_md5](#ssl_cert_thumbprint_md5-property-dtlsserver-struct) | The MD5 hash of the certificate. | | [ssl_cert_thumbprint_sha1](#ssl_cert_thumbprint_sha1-property-dtlsserver-struct) | The SHA-1 hash of the certificate. | | [ssl_cert_thumbprint_sha256](#ssl_cert_thumbprint_sha256-property-dtlsserver-struct) | The SHA-256 hash of the certificate. | | [ssl_cert_usage](#ssl_cert_usage-property-dtlsserver-struct) | The text description of UsageFlags . | | [ssl_cert_usage_flags](#ssl_cert_usage_flags-property-dtlsserver-struct) | The flags that show intended use for the certificate. | | [ssl_cert_version](#ssl_cert_version-property-dtlsserver-struct) | The certificate's version number. | | [ssl_cert_subject](#ssl_cert_subject-property-dtlsserver-struct) | The subject of the certificate used for client authentication. | | [ssl_cert_encoded](#ssl_cert_encoded-property-dtlsserver-struct) | The certificate (PEM/Base64 encoded). | ## Method List *The following is the full list of the methods of the struct with short descriptions. Click on the links for further details.* | | | | --- | --- | | [config](#config-method-dtlsserver-struct) | Sets or retrieves a configuration setting. | | [disconnect](#disconnect-method-dtlsserver-struct) | This method disconnects the specified client. | | [do_events](#do_events-method-dtlsserver-struct) | This method processes events from the internal message queue. | | [pause_data](#pause_data-method-dtlsserver-struct) | This method pauses data reception. | | [process_data](#process_data-method-dtlsserver-struct) | This method reenables data reception after a call to PauseData . | | [reset](#reset-method-dtlsserver-struct) | This method will reset the struct. | | [send_bytes](#send_bytes-method-dtlsserver-struct) | This method sends binary data to the specified client. | | [send_text](#send_text-method-dtlsserver-struct) | This method sends text to the specified client. | | [shutdown](#shutdown-method-dtlsserver-struct) | This method shuts down the server. | | [start_listening](#start_listening-method-dtlsserver-struct) | This method starts listening for incoming connections. | | [stop_listening](#stop_listening-method-dtlsserver-struct) | This method stops listening for new connections. | ## Event List *The following is the full list of the events fired by the struct with short descriptions. Click on the links for further details.* | | | | --- | --- | | [on_connected](#on_connected-event-dtlsserver-struct) | This event is fired immediately after a connection completes (or fails). | | [on_connection_request](#on_connection_request-event-dtlsserver-struct) | This event is fired when a request for connection comes from a remote host. | | [on_data_in](#on_data_in-event-dtlsserver-struct) | This event is fired when data is received. | | [on_disconnected](#on_disconnected-event-dtlsserver-struct) | This event is fired when a connection is closed. | | [on_error](#on_error-event-dtlsserver-struct) | This event fires information about errors during data delivery. | | [on_log](#on_log-event-dtlsserver-struct) | This event fires once for each log message. | | [on_ssl_client_authentication](#on_ssl_client_authentication-event-dtlsserver-struct) | This event is fired when the client presents its credentials to the server. | | [on_ssl_status](#on_ssl_status-event-dtlsserver-struct) | This event is fired to show the progress of the secure connection. | ## Config Settings *The following is a list of config settings for the struct with short descriptions. Click on the links for further details.* | | | | --- | --- | | [KeepAliveInterval](#KeepAliveInterval) | The retry interval, in seconds, to be used when a HeartbeatRequest is sent and no response is received. | | [KeepAliveMode](#KeepAliveMode) | Specifies the Heartbeat (or keep-alive) mode to be used by the struct. | | [KeepAliveTime](#KeepAliveTime) | The inactivity time, in seconds, before a HeartbeatRequest is sent. | | [LogLevel](#LogLevel) | This configuration controls the level of detail that is logged through the Log event. | | [MaxConnections](#MaxConnections) | Specifies the maximum number of simultaneous connections the server can maintain. | | [CaptureIPPacketInfo](#CaptureIPPacketInfo) | Used to capture the packet information. | | [DelayHostResolution](#DelayHostResolution) | Whether the hostname is resolved when RemoteHost is set. | | [DestinationAddress](#DestinationAddress) | Used to get the destination address from the packet information. | | [DontFragment](#DontFragment) | Used to set the Don't Fragment flag of outgoing packets. | | [LocalHost](#LocalHost) | The name of the local host through which connections are initiated or accepted. | | [LocalPort](#LocalPort) | The port in the local host where the struct binds. | | [MaxPacketSize](#MaxPacketSize) | The maximum length of the packets that can be received. | | [QOSDSCPValue](#QOSDSCPValue) | Used to specify an arbitrary QOS/DSCP setting (optional). | | [QOSTrafficType](#QOSTrafficType) | Used to specify QOS/DSCP settings (optional). | | [ShareLocalPort](#ShareLocalPort) | If set to True, allows more than one instance of the struct to be active on the same local port. | | [UseConnection](#UseConnection) | Determines whether to use a connected socket. | | [UseIPv6](#UseIPv6) | Whether or not to use IPv6. | | [AbsoluteTimeout](#AbsoluteTimeout) | Determines whether timeouts are inactivity timeouts or absolute timeouts. | | [FirewallData](#FirewallData) | Used to send extra data to the firewall. | | [InBufferSize](#InBufferSize) | The size in bytes of the incoming queue of the socket. | | [OutBufferSize](#OutBufferSize) | The size in bytes of the outgoing queue of the socket. | | [LogSSLPackets](#LogSSLPackets) | Controls whether SSL packets are logged. | | [ReuseSSLSession](#ReuseSSLSession) | Determines if the SSL session is reused. | | [SSLCACerts](#SSLCACerts) | A newline separated list of CA certificates to be included when performing an SSL handshake. | | [SSLCheckCRL](#SSLCheckCRL) | Whether to check the Certificate Revocation List for the server certificate. | | [SSLCheckOCSP](#SSLCheckOCSP) | Whether to use OCSP to check the status of the server certificate. | | [SSLCipherStrength](#SSLCipherStrength) | The minimum cipher strength used for bulk encryption. | | [SSLClientCACerts](#SSLClientCACerts) | A newline separated list of CA certificates to use during SSL client certificate validation. | | [SSLEnabledCipherSuites](#SSLEnabledCipherSuites) | Specifies the cipher suites to be used during TLS negotiation. | | [SSLEnabledProtocols](#SSLEnabledProtocols) | Used to enable/disable the supported security protocols. | | [SSLEnableRenegotiation](#SSLEnableRenegotiation) | Whether the renegotiation_info SSL extension is supported. | | [SSLKeyLogFile](#SSLKeyLogFile) | The location of a file where per-session secrets are written for debugging purposes. | | [SSLNegotiatedCipher](#SSLNegotiatedCipher) | Returns the negotiated cipher suite. | | [SSLNegotiatedCipherStrength](#SSLNegotiatedCipherStrength) | Returns the negotiated cipher suite strength. | | [SSLNegotiatedCipherSuite](#SSLNegotiatedCipherSuite) | Returns the negotiated cipher suite. | | [SSLNegotiatedKeyExchange](#SSLNegotiatedKeyExchange) | Returns the negotiated key exchange algorithm. | | [SSLNegotiatedKeyExchangeStrength](#SSLNegotiatedKeyExchangeStrength) | Returns the negotiated key exchange algorithm strength. | | [SSLNegotiatedVersion](#SSLNegotiatedVersion) | Returns the negotiated protocol version. | | [SSLSecurityFlags](#SSLSecurityFlags) | Flags that control certificate verification. | | [SSLServerCACerts](#SSLServerCACerts) | A newline separated list of CA certificates to use during SSL server certificate validation. | | [TLS12SignatureAlgorithms](#TLS12SignatureAlgorithms) | Defines the allowed TLS 1.2 signature algorithms when SSLProvider is set to Internal. | | [TLS12SupportedGroups](#TLS12SupportedGroups) | The supported groups for ECC. | | [BuildInfo](#BuildInfo) | Information about the product's build. | | [CodePage](#CodePage) | The system code page used for Unicode to Multibyte translations. | | [LicenseInfo](#LicenseInfo) | Information about the current license. | | [MaskSensitiveData](#MaskSensitiveData) | Whether sensitive data is masked in log messages. | | [UseInternalSecurityAPI](#UseInternalSecurityAPI) | Whether or not to use the system security libraries or an internal implementation. | # connection_count property ([DTLSServer](#struct-ipworksdtlsserver) Struct) The number of records in the Connection arrays. ## Syntax *Rust Syntax* ```text fn connection_count(&self ) -> Result fn set_connection_count(&self, value : i32) -> Option ``` ## Default Value 0 ## Remarks This property controls the size of the following arrays: - [connection_id](#connection_id-property-dtlsserver-struct) - [connection_local_host](#connection_local_host-property-dtlsserver-struct) - [connection_local_port](#connection_local_port-property-dtlsserver-struct) - [connection_remote_host](#connection_remote_host-property-dtlsserver-struct) - [connection_remote_port](#connection_remote_port-property-dtlsserver-struct) The array indices start at *0* and end at *connection_count - 1*. ## Data Type i32 # connection_id property ([DTLSServer](#struct-ipworksdtlsserver) Struct) This property contains an identifier generated by the struct to identify each connection. ## Syntax *Rust Syntax* ```text fn connection_id(&self , ConnectionId : i32) -> Result ``` ## Default Value 0 ## Remarks This property contains an identifier generated by the struct to identify each connection. This identifier is unique to this connection. The *ConnectionId* parameter specifies the index of the item in the array. The size of the array is controlled by the [ConnectionCount](#connection_count-property-dtlsserver-struct) property. This property is read-only. ## Data Type i32 # connection_local_host property ([DTLSServer](#struct-ipworksdtlsserver) Struct) This property indicates the name of the local host or user-assigned IP interface through which connections are initiated or accepted. ## Syntax *Rust Syntax* ```text fn connection_local_host(&self , ConnectionId : i32) -> Result ``` ## Default Value "" ## Remarks This property indicates the name of the local host or user-assigned IP interface through which connections are initiated or accepted. The *ConnectionId* parameter specifies the index of the item in the array. The size of the array is controlled by the [ConnectionCount](#connection_count-property-dtlsserver-struct) property. This property is read-only. ## Data Type String # connection_local_port property ([DTLSServer](#struct-ipworksdtlsserver) Struct) This property indicates the UDP port on the local host or user-assigned IP interface through which connections are initiated or accepted. ## Syntax *Rust Syntax* ```text fn connection_local_port(&self , ConnectionId : i32) -> Result ``` ## Default Value 0 ## Remarks This property indicates the UDP port on the local host or user-assigned IP interface through which connections are initiated or accepted. The *ConnectionId* parameter specifies the index of the item in the array. The size of the array is controlled by the [ConnectionCount](#connection_count-property-dtlsserver-struct) property. This property is read-only. ## Data Type i32 # connection_remote_host property ([DTLSServer](#struct-ipworksdtlsserver) Struct) This property indicates the IP address of the remote host through which the connection is coming. ## Syntax *Rust Syntax* ```text fn connection_remote_host(&self , ConnectionId : i32) -> Result ``` ## Default Value "" ## Remarks This property indicates the IP address of the remote host through which the connection is coming. The connection must be valid or an error will be fired. If the struct 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. The *ConnectionId* parameter specifies the index of the item in the array. The size of the array is controlled by the [ConnectionCount](#connection_count-property-dtlsserver-struct) property. This property is read-only. ## Data Type String # connection_remote_port property ([DTLSServer](#struct-ipworksdtlsserver) Struct) This property indicates the UDP port on the remote host through which the connection is coming. ## Syntax *Rust Syntax* ```text fn connection_remote_port(&self , ConnectionId : i32) -> Result ``` ## Default Value 0 ## Remarks This property indicates the UDP port on the remote host through which the connection is coming. The connection must be valid or an error will be fired. The *ConnectionId* parameter specifies the index of the item in the array. The size of the array is controlled by the [ConnectionCount](#connection_count-property-dtlsserver-struct) property. This property is read-only. ## Data Type i32 # default_idle_timeout property ([DTLSServer](#struct-ipworksdtlsserver) Struct) This property includes the default idle timeout for inactive clients. ## Syntax *Rust Syntax* ```text fn default_idle_timeout(&self ) -> Result fn set_default_idle_timeout(&self, value : i32) -> Option ``` ## Default Value 0 ## Remarks This property specifies the idle timeout (in seconds) for clients. When set to a positive value, the struct will disconnect idle clients after the specified timeout. This applies only to clients that have not sent or received data within default_idle_timeout seconds. If set to 0 (default), no idle timeout is applied. NOTE: [do_events](#do_events-method-dtlsserver-struct) must be called for the struct to check existing connections. ## Data Type i32 # keep_alive property ([DTLSServer](#struct-ipworksdtlsserver) Struct) When True, keep-alive functionality is enabled via the DTLS Heartbeat Extension. ## Syntax *Rust Syntax* ```text fn keep_alive(&self ) -> Result fn set_keep_alive(&self, value : bool) -> Option ``` ## Default Value false ## Remarks This property enables keep-alive functionality for established connections via the DTLS Heartbeat Extension (RFC 6520). Enabling this option can prevent long connections from timing out in case of inactivity. NOTE: For this functionality to work as intended, [do_events](#do_events-method-dtlsserver-struct) must be called frequently in **both** console and form-based applications (e.g., using a loop or timer). Additionally, DTLS server implementations are not required to support Heartbeats. ## Data Type bool # listening property ([DTLSServer](#struct-ipworksdtlsserver) Struct) This property indicates whether the struct is listening for incoming connections on LocalPort. ## Syntax *Rust Syntax* ```text fn listening(&self ) -> Result ``` ## Default Value false ## Remarks This property indicates whether the struct is listening for connections on the port specified by the [local_port](#local_port-property-dtlsserver-struct) property. Use the [start_listening](#start_listening-method-dtlsserver-struct) and [stop_listening](#stop_listening-method-dtlsserver-struct) methods to control whether the struct is listening. This property is read-only. ## Data Type bool # local_host property ([DTLSServer](#struct-ipworksdtlsserver) Struct) The name of the local host or user-assigned IP interface through which connections are initiated or accepted. ## Syntax *Rust Syntax* ```text fn local_host(&self ) -> Result fn set_local_host(&self, value : &str) -> Option fn set_local_host_ref(&self, value : &String) -> Option ``` ## 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 struct initiate connections (or accept in the case of server structs) 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 struct is connected, the local_host 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: local_host is not persistent. You must always set it in code, and never in the property window. ## Data Type String # local_port property ([DTLSServer](#struct-ipworksdtlsserver) Struct) This property includes the User Datagram Protocol (UDP) port in the local host where the struct listens. ## Syntax *Rust Syntax* ```text fn local_port(&self ) -> Result fn set_local_port(&self, value : i32) -> Option ``` ## Default Value 0 ## Remarks This property must be set before the struct can start listening. If its value is 0, then the TCP/IP subsystem picks a port number at random. The port number can be found by checking the value of this property after the struct is listening (i.e., after successfully calling the [start_listening](#start_listening-method-dtlsserver-struct) method). The service port is not shared among servers so two structs cannot be listening on the same port at the same time. ## Data Type i32 # ssl_authenticate_clients property ([DTLSServer](#struct-ipworksdtlsserver) Struct) If set to True, the server asks the client(s) for a certificate. ## Syntax *Rust Syntax* ```text fn ssl_authenticate_clients(&self ) -> Result fn set_ssl_authenticate_clients(&self, value : bool) -> Option ``` ## Default Value false ## Remarks This property is used in conjunction with the [on_ssl_client_authentication](#on_ssl_client_authentication-event-dtlsserver-struct) event. Please refer to the documentation of the [on_ssl_client_authentication](#on_ssl_client_authentication-event-dtlsserver-struct) event for details. ## Data Type bool # ssl_cert_effective_date property ([DTLSServer](#struct-ipworksdtlsserver) Struct) The date on which this certificate becomes valid. ## Syntax *Rust Syntax* ```text fn ssl_cert_effective_date(&self ) -> Result ``` ## Default Value "" ## Remarks 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. This property is read-only. ## Data Type String # ssl_cert_expiration_date property ([DTLSServer](#struct-ipworksdtlsserver) Struct) The date on which the certificate expires. ## Syntax *Rust Syntax* ```text fn ssl_cert_expiration_date(&self ) -> Result ``` ## Default Value "" ## Remarks 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. This property is read-only. ## Data Type String # ssl_cert_extended_key_usage property ([DTLSServer](#struct-ipworksdtlsserver) Struct) A comma-delimited list of extended key usage identifiers. ## Syntax *Rust Syntax* ```text fn ssl_cert_extended_key_usage(&self ) -> Result ``` ## Default Value "" ## Remarks A comma-delimited list of extended key usage identifiers. These are the same as ASN.1 object identifiers (OIDs). This property is read-only. ## Data Type String # ssl_cert_fingerprint property ([DTLSServer](#struct-ipworksdtlsserver) Struct) The hex-encoded, 16-byte MD5 fingerprint of the certificate. ## Syntax *Rust Syntax* ```text fn ssl_cert_fingerprint(&self ) -> Result ``` ## Default Value "" ## Remarks 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* This property is read-only. ## Data Type String # ssl_cert_fingerprint_sha1 property ([DTLSServer](#struct-ipworksdtlsserver) Struct) The hex-encoded, 20-byte SHA-1 fingerprint of the certificate. ## Syntax *Rust Syntax* ```text fn ssl_cert_fingerprint_sha1(&self ) -> Result ``` ## Default Value "" ## Remarks 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* This property is read-only. ## Data Type String # ssl_cert_fingerprint_sha256 property ([DTLSServer](#struct-ipworksdtlsserver) Struct) The hex-encoded, 32-byte SHA-256 fingerprint of the certificate. ## Syntax *Rust Syntax* ```text fn ssl_cert_fingerprint_sha256(&self ) -> Result ``` ## Default Value "" ## Remarks 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* This property is read-only. ## Data Type String # ssl_cert_issuer property ([DTLSServer](#struct-ipworksdtlsserver) Struct) The issuer of the certificate. ## Syntax *Rust Syntax* ```text fn ssl_cert_issuer(&self ) -> Result ``` ## Default Value "" ## Remarks The issuer of the certificate. This property contains a string representation of the name of the issuing authority for the certificate. This property is read-only. ## Data Type String # ssl_cert_private_key property ([DTLSServer](#struct-ipworksdtlsserver) Struct) The private key of the certificate (if available). ## Syntax *Rust Syntax* ```text fn ssl_cert_private_key(&self ) -> Result ``` ## Default Value "" ## Remarks The private key of the certificate (if available). The key is provided as PEM/Base64-encoded data. NOTE: The [ssl_cert_private_key](#ssl_cert_private_key-property-dtlsserver-struct) may be available but not exportable. In this case, [ssl_cert_private_key](#ssl_cert_private_key-property-dtlsserver-struct) returns an empty string. This property is read-only. ## Data Type String # ssl_cert_private_key_available property ([DTLSServer](#struct-ipworksdtlsserver) Struct) Whether a PrivateKey is available for the selected certificate. ## Syntax *Rust Syntax* ```text fn ssl_cert_private_key_available(&self ) -> Result ``` ## Default Value false ## Remarks Whether a [ssl_cert_private_key](#ssl_cert_private_key-property-dtlsserver-struct) is available for the selected certificate. If [ssl_cert_private_key_available](#ssl_cert_private_key_available-property-dtlsserver-struct) is True, the certificate may be used for authentication purposes (e.g., server authentication). This property is read-only. ## Data Type bool # ssl_cert_private_key_container property ([DTLSServer](#struct-ipworksdtlsserver) Struct) The name of the PrivateKey container for the certificate (if available). ## Syntax *Rust Syntax* ```text fn ssl_cert_private_key_container(&self ) -> Result ``` ## Default Value "" ## Remarks The name of the [ssl_cert_private_key](#ssl_cert_private_key-property-dtlsserver-struct) container for the certificate (if available). This functionality is available only on Windows platforms. This property is read-only. ## Data Type String # ssl_cert_public_key property ([DTLSServer](#struct-ipworksdtlsserver) Struct) The public key of the certificate. ## Syntax *Rust Syntax* ```text fn ssl_cert_public_key(&self ) -> Result ``` ## Default Value "" ## Remarks The public key of the certificate. The key is provided as PEM/Base64-encoded data. This property is read-only. ## Data Type String # ssl_cert_public_key_algorithm property ([DTLSServer](#struct-ipworksdtlsserver) Struct) The textual description of the certificate's public key algorithm. ## Syntax *Rust Syntax* ```text fn ssl_cert_public_key_algorithm(&self ) -> Result ``` ## Default Value "" ## Remarks 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. This property is read-only. ## Data Type String # ssl_cert_public_key_length property ([DTLSServer](#struct-ipworksdtlsserver) Struct) The length of the certificate's public key (in bits). ## Syntax *Rust Syntax* ```text fn ssl_cert_public_key_length(&self ) -> Result ``` ## Default Value 0 ## Remarks The length of the certificate's public key (in bits). Common values are 512, 1024, and 2048. This property is read-only. ## Data Type i32 # ssl_cert_serial_number property ([DTLSServer](#struct-ipworksdtlsserver) Struct) The serial number of the certificate encoded as a string. ## Syntax *Rust Syntax* ```text fn ssl_cert_serial_number(&self ) -> Result ``` ## Default Value "" ## Remarks 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. This property is read-only. ## Data Type String # ssl_cert_signature_algorithm property ([DTLSServer](#struct-ipworksdtlsserver) Struct) The text description of the certificate's signature algorithm. ## Syntax *Rust Syntax* ```text fn ssl_cert_signature_algorithm(&self ) -> Result ``` ## Default Value "" ## Remarks 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. This property is read-only. ## Data Type String # ssl_cert_store property ([DTLSServer](#struct-ipworksdtlsserver) Struct) The name of the certificate store for the client certificate. ## Syntax *Rust Syntax* ```text fn ssl_cert_store(&self ) -> Result, IPWorksError> fn set_ssl_cert_store(&self, value : Vec) -> Option fn set_ssl_cert_store_ref(&self, value : &[u8]) -> Option ``` ## Default Value "MY" ## Remarks The name of the certificate store for the client certificate. The [ssl_cert_store_type](#ssl_cert_store_type-property-dtlsserver-struct) property denotes the type of the certificate store specified by [ssl_cert_store](#ssl_cert_store-property-dtlsserver-struct). If the store is password-protected, specify the password in [ssl_cert_store_password](#ssl_cert_store_password-property-dtlsserver-struct). [ssl_cert_store](#ssl_cert_store-property-dtlsserver-struct) is used in conjunction with the [ssl_cert_subject](#ssl_cert_subject-property-dtlsserver-struct) property to specify client certificates. If [ssl_cert_store](#ssl_cert_store-property-dtlsserver-struct) has a value, and [ssl_cert_subject](#ssl_cert_subject-property-dtlsserver-struct) or [ssl_cert_encoded](#ssl_cert_encoded-property-dtlsserver-struct) is set, a search for a certificate is initiated. Please see the [ssl_cert_subject](#ssl_cert_subject-property-dtlsserver-struct) property for details. Designations of certificate stores are platform dependent. The following designations are the most common User and Machine certificate stores in Windows: | | | | --- | --- | | MY | A certificate store holding personal certificates with their associated private keys. | | CA | Certifying authority certificates. | | ROOT | Root certificates. | When the certificate store type is *cstPFXFile*, this property must be set to the name of the file. When the type is *cstPFXBlob*, the property must be set to the binary contents of a PFX file (i.e., PKCS#12 certificate store). ## Data Type Vec # ssl_cert_store_password property ([DTLSServer](#struct-ipworksdtlsserver) Struct) If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store. ## Syntax *Rust Syntax* ```text fn ssl_cert_store_password(&self ) -> Result fn set_ssl_cert_store_password(&self, value : &str) -> Option fn set_ssl_cert_store_password_ref(&self, value : &String) -> Option ``` ## Default Value "" ## Remarks If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store. ## Data Type String # ssl_cert_store_type property ([DTLSServer](#struct-ipworksdtlsserver) Struct) The type of certificate store for this certificate. ## Syntax *Rust Syntax* ```text fn ssl_cert_store_type(&self ) -> Result fn set_ssl_cert_store_type(&self, value : i32) -> Option ``` ## Possible Values ```text 0 // User1 // Machine2 // PFXFile3 // PFXBlob4 // JKSFile5 // JKSBlob6 // PEMKeyFile7 // PEMKeyBlob8 // PublicKeyFile9 // PublicKeyBlob10 // SSHPublicKeyBlob11 // P7BFile12 // P7BBlob13 // SSHPublicKeyFile14 // PPKFile15 // PPKBlob16 // XMLFile17 // XMLBlob18 // JWKFile19 // JWKBlob20 // SecurityKey21 // BCFKSFile22 // BCFKSBlob23 // PKCS1199 // Auto ``` ## Default Value 0 ## Remarks The type of certificate store for this certificate. The struct supports both public and private keys in a variety of formats. When the *cstAuto* value is used, the struct will automatically determine the type. This property can take one of the following values: ```csharp sftp.SSHCert = new Certificate(CertStoreTypes.cstPKCS11, @"C:\Program Files\OpenSC Project\OpenSC\pkcs11\opensc-pkcs11.dll", "123456", // PIN "CN=cert_subject"); sftp.SSHUser = "test"; sftp.SSHLogon("myhost", 22); ``` ```csharp certmgr.CertStoreType = CertStoreTypes.cstPKCS11; certmgr.OnCertList += (s, e) => { secKeyBlob = e.CertEncoded; }; certmgr.CertStore = @"C:\Program Files\OpenSC Project\OpenSC\pkcs11\opensc-pkcs11.dll"; certmgr.CertStorePassword = "123456"; // PIN certmgr.ListStoreCertificates(); sftp.SSHCert = new Certificate(CertStoreTypes.cstPKCS11, secKeyBlob, "123456", "*"); sftp.SSHUser = "test"; sftp.SSHLogon("myhost", 22); ``` | | | | --- | --- | | 0 (cstUser - default) | For Windows, this specifies that the certificate store is a certificate store owned by the current user. NOTE: This store type is not available in Java. | | 1 (cstMachine) | For Windows, this specifies that the certificate store is a machine store. NOTE: This store type is not available in Java. | | 2 (cstPFXFile) | The certificate store is the name of a PFX (PKCS#12) file containing certificates. | | 3 (cstPFXBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in PFX (PKCS#12) format. | | 4 (cstJKSFile) | The certificate store is the name of a Java Key Store (JKS) file containing certificates. NOTE: This store type is only available in Java. | | 5 (cstJKSBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in Java Key Store (JKS) format. NOTE: This store type is only available in Java. | | 6 (cstPEMKeyFile) | The certificate store is the name of a PEM-encoded file that contains a private key and an optional certificate. | | 7 (cstPEMKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains a private key and an optional certificate. | | 8 (cstPublicKeyFile) | The certificate store is the name of a file that contains a PEM- or DER-encoded public key certificate. | | 9 (cstPublicKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains a PEM- or DER-encoded public key certificate. | | 10 (cstSSHPublicKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains an SSH-style public key. | | 11 (cstP7BFile) | The certificate store is the name of a PKCS#7 file containing certificates. | | 12 (cstP7BBlob) | The certificate store is a string (binary) representing a certificate store in PKCS#7 format. | | 13 (cstSSHPublicKeyFile) | The certificate store is the name of a file that contains an SSH-style public key. | | 14 (cstPPKFile) | The certificate store is the name of a file that contains a PPK (PuTTY Private Key). | | 15 (cstPPKBlob) | The certificate store is a string (binary) that contains a PPK (PuTTY Private Key). | | 16 (cstXMLFile) | The certificate store is the name of a file that contains a certificate in XML format. | | 17 (cstXMLBlob) | The certificate store is a string that contains a certificate in XML format. | | 18 (cstJWKFile) | The certificate store is the name of a file that contains a JWK (JSON Web Key). | | 19 (cstJWKBlob) | The certificate store is a string that contains a JWK (JSON Web Key). | | 21 (cstBCFKSFile) | The certificate store is the name of a file that contains a BCFKS (Bouncy Castle FIPS Key Store). NOTE: This store type is only available in Java and .NET. | | 22 (cstBCFKSBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in BCFKS (Bouncy Castle FIPS Key Store) format. NOTE: This store type is only available in Java and .NET. | | 23 (cstPKCS11) | The certificate is present on a physical security key accessible via a PKCS#11 interface. To use a security key, create a new [Certificate](#Type_Certificate) object and pass cstPKCS11 as the [ssl_cert_store_type](#ssl_cert_store_type-property-dtlsserver-struct), the full path of the PKCS#11 DLL as the [ssl_cert_store](#ssl_cert_store-property-dtlsserver-struct), and the PIN as the [ssl_cert_store_password](#ssl_cert_store_password-property-dtlsserver-struct). Code Example. SSH Authentication with Security Key (without CertMgr): Alternatively, collect the necessary data using the [CertMgr](#CertMgr) struct by calling the [list_store_certificates](#CertMgr_m_ListStoreCertificates) method after setting the corresponding properties accordingly. The certificate information returned in the [on_cert_list](#CertMgr_e_CertList) event's CertEncoded parameter may be saved for later use. When using a certificate obtained with this approach, pass the previously saved security key information as the [ssl_cert_store](#ssl_cert_store-property-dtlsserver-struct) and set [ssl_cert_store_password](#ssl_cert_store_password-property-dtlsserver-struct) to the PIN. Code Example. SSH Authentication with Security Key (with CertMgr): | | 99 (cstAuto) | The store type is automatically detected from the input data. This setting may be used with both public and private keys and can detect any of the supported formats automatically. | ## Data Type i32 # ssl_cert_subject_alt_names property ([DTLSServer](#struct-ipworksdtlsserver) Struct) Comma-separated lists of alternative subject names for the certificate. ## Syntax *Rust Syntax* ```text fn ssl_cert_subject_alt_names(&self ) -> Result ``` ## Default Value "" ## Remarks Comma-separated lists of alternative subject names for the certificate. This property is read-only. ## Data Type String # ssl_cert_thumbprint_md5 property ([DTLSServer](#struct-ipworksdtlsserver) Struct) The MD5 hash of the certificate. ## Syntax *Rust Syntax* ```text fn ssl_cert_thumbprint_md5(&self ) -> Result ``` ## Default Value "" ## Remarks 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. This property is read-only. ## Data Type String # ssl_cert_thumbprint_sha1 property ([DTLSServer](#struct-ipworksdtlsserver) Struct) The SHA-1 hash of the certificate. ## Syntax *Rust Syntax* ```text fn ssl_cert_thumbprint_sha1(&self ) -> Result ``` ## Default Value "" ## Remarks 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. This property is read-only. ## Data Type String # ssl_cert_thumbprint_sha256 property ([DTLSServer](#struct-ipworksdtlsserver) Struct) The SHA-256 hash of the certificate. ## Syntax *Rust Syntax* ```text fn ssl_cert_thumbprint_sha256(&self ) -> Result ``` ## Default Value "" ## Remarks 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. This property is read-only. ## Data Type String # ssl_cert_usage property ([DTLSServer](#struct-ipworksdtlsserver) Struct) The text description of UsageFlags . ## Syntax *Rust Syntax* ```text fn ssl_cert_usage(&self ) -> Result ``` ## Default Value "" ## Remarks The text description of [ssl_cert_usage_flags](#ssl_cert_usage_flags-property-dtlsserver-struct). 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. This property is read-only. ## Data Type String # ssl_cert_usage_flags property ([DTLSServer](#struct-ipworksdtlsserver) Struct) The flags that show intended use for the certificate. ## Syntax *Rust Syntax* ```text fn ssl_cert_usage_flags(&self ) -> Result ``` ## Default Value 0 ## Remarks The flags that show intended use for the certificate. The value of [ssl_cert_usage_flags](#ssl_cert_usage_flags-property-dtlsserver-struct) is a combination of the following flags: | | | | --- | --- | | 0x80 | Digital Signature | | 0x40 | Non-Repudiation | | 0x20 | Key Encipherment | | 0x10 | Data Encipherment | | 0x08 | Key Agreement | | 0x04 | Certificate Signing | | 0x02 | CRL Signing | | 0x01 | Encipher Only | Please see the [ssl_cert_usage](#ssl_cert_usage-property-dtlsserver-struct) property for a text representation of [ssl_cert_usage_flags](#ssl_cert_usage_flags-property-dtlsserver-struct). This functionality currently is not available when the provider is OpenSSL. This property is read-only. ## Data Type i32 # ssl_cert_version property ([DTLSServer](#struct-ipworksdtlsserver) Struct) The certificate's version number. ## Syntax *Rust Syntax* ```text fn ssl_cert_version(&self ) -> Result ``` ## Default Value "" ## Remarks The certificate's version number. The possible values are the strings "V1", "V2", and "V3". This property is read-only. ## Data Type String # ssl_cert_subject property ([DTLSServer](#struct-ipworksdtlsserver) Struct) The subject of the certificate used for client authentication. ## Syntax *Rust Syntax* ```text fn ssl_cert_subject(&self ) -> Result fn set_ssl_cert_subject(&self, value : &str) -> Option fn set_ssl_cert_subject_ref(&self, value : &String) -> Option ``` ## Default Value "" ## Remarks The subject of the certificate used for client authentication. This property must be set after all other certificate properties are set. When this property is set, a search is performed in the current certificate store to locate a certificate with a matching subject. If a matching certificate is found, the property is set to the full subject of the matching certificate. If an exact match is not found, the store is searched for subjects containing the value of the property. If a match is still not found, the property is set to an empty string, and no certificate is selected. The special value "*" picks a random certificate in the certificate store. The certificate subject is a comma-separated list of distinguished name fields and values. For instance, "CN=www.server.com, OU=test, C=US, E=example@email.com". Common fields and their meanings are as follows: | Field | Meaning | | --- | --- | | CN | Common Name. This is commonly a hostname like www.server.com. | | O | Organization | | OU | Organizational Unit | | L | Locality | | S | State | | C | Country | | E | Email Address | If a field value contains a comma, it must be quoted. ## Data Type String # ssl_cert_encoded property ([DTLSServer](#struct-ipworksdtlsserver) Struct) The certificate (PEM/Base64 encoded). ## Syntax *Rust Syntax* ```text fn ssl_cert_encoded(&self ) -> Result, IPWorksError> fn set_ssl_cert_encoded(&self, value : Vec) -> Option fn set_ssl_cert_encoded_ref(&self, value : &[u8]) -> Option ``` ## Default Value "" ## Remarks The certificate (PEM/Base64 encoded). This property is used to assign a specific certificate. The [ssl_cert_store](#ssl_cert_store-property-dtlsserver-struct) and [ssl_cert_subject](#ssl_cert_subject-property-dtlsserver-struct) properties also may be used to specify a certificate. When [ssl_cert_encoded](#ssl_cert_encoded-property-dtlsserver-struct) is set, a search is initiated in the current [ssl_cert_store](#ssl_cert_store-property-dtlsserver-struct) for the private key of the certificate. If the key is found, [ssl_cert_subject](#ssl_cert_subject-property-dtlsserver-struct) is updated to reflect the full subject of the selected certificate; otherwise, [ssl_cert_subject](#ssl_cert_subject-property-dtlsserver-struct) is set to an empty string. ## Data Type Vec # config method ([DTLSServer](#struct-ipworksdtlsserver) Struct) Sets or retrieves a configuration setting. ## Syntax *Rust Syntax* ```text fn config(&self, configuration_string : &str) -> Result ``` ## Remarks config is a generic method available in every struct. It is used to set and retrieve [configuration settings](#config-settings-dtlsserver-struct) for the struct. These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the struct, access to these *internal properties* is provided through the config method. To set a configuration setting named *PROPERTY*, you must call *Config("PROPERTY=VALUE")*, where *VALUE* is the value of the setting expressed as a string. For boolean values, use the strings "True", "False", "0", "1", "Yes", or "No" (case does not matter). To read (query) the value of a [configuration setting](#config-settings-dtlsserver-struct), you must call *Config("PROPERTY")*. The value will be returned as a string. # disconnect method ([DTLSServer](#struct-ipworksdtlsserver) Struct) This method disconnects the specified client. ## Syntax *Rust Syntax* ```text fn disconnect(&self, connection_id : i32) -> Result<(), IPWorksError> ``` ## Remarks Calling this method will disconnect the client specified by the *connection_id* parameter. # do_events method ([DTLSServer](#struct-ipworksdtlsserver) Struct) This method processes events from the internal message queue. ## Syntax *Rust Syntax* ```text fn do_events(&self) -> Result<(), IPWorksError> ``` ## Remarks When do_events is called, the struct processes any available events. If no events are available, it waits for a preset period of time, and then returns. # pause_data method ([DTLSServer](#struct-ipworksdtlsserver) Struct) This method pauses data reception. ## Syntax *Rust Syntax* ```text fn pause_data(&self, connection_id : i32) -> Result<(), IPWorksError> ``` ## Remarks This method pauses data reception for the connection identified by *connection_id* when called. While data reception is paused, the [on_data_in](#on_data_in-event-dtlsserver-struct) event will not fire for the specified connection. Call [process_data](#process_data-method-dtlsserver-struct) to reenable data reception. # process_data method ([DTLSServer](#struct-ipworksdtlsserver) Struct) This method reenables data reception after a call to PauseData . ## Syntax *Rust Syntax* ```text fn process_data(&self, connection_id : i32) -> Result<(), IPWorksError> ``` ## Remarks This method reenables data reception for the connection identified by *connection_id* after a previous call to [pause_data](#pause_data-method-dtlsserver-struct). When [pause_data](#pause_data-method-dtlsserver-struct) is called, the [on_data_in](#on_data_in-event-dtlsserver-struct) event will not fire for the specified connection. To reenable data reception and allow [on_data_in](#on_data_in-event-dtlsserver-struct) to fire, call this method. NOTE: This method is used only after previously calling [pause_data](#pause_data-method-dtlsserver-struct). It does not need to be called to process incoming data by default. # reset method ([DTLSServer](#struct-ipworksdtlsserver) Struct) This method will reset the struct. ## Syntax *Rust Syntax* ```text fn reset(&self) -> Result<(), IPWorksError> ``` ## Remarks This method will reset the struct's properties to their default values. # send_bytes method ([DTLSServer](#struct-ipworksdtlsserver) Struct) This method sends binary data to the specified client. ## Syntax *Rust Syntax* ```text fn send_bytes(&self, connection_id : i32, data : &[u8]) -> Result<(), IPWorksError> ``` ## Remarks This method sends binary data to the client identified by *connection_id*. For example: ```text byte[] dataToSend = new byte[] { 72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100, 33 }; foreach (DTLSConnection c in dtlsserver.Connections.Values) { dtlsserver.SendBytes(c.ConnectionId, dataToSend); } ``` To send text, use the [send_text](#send_text-method-dtlsserver-struct) method instead. # send_text method ([DTLSServer](#struct-ipworksdtlsserver) Struct) This method sends text to the specified client. ## Syntax *Rust Syntax* ```text fn send_text(&self, connection_id : i32, text : &str) -> Result<(), IPWorksError> ``` ## Remarks This method sends text to the client identified by *connection_id*. For example: ```text string dataToSend = "Hello world!"; foreach (DTLSConnection c in dtlsserver.Connections.Values) { dtlsserver.SendText(c.ConnectionId, dataToSend); } ``` To send binary data, use the [send_bytes](#send_bytes-method-dtlsserver-struct) method instead. # shutdown method ([DTLSServer](#struct-ipworksdtlsserver) Struct) This method shuts down the server. ## Syntax *Rust Syntax* ```text fn shutdown(&self) -> Result<(), IPWorksError> ``` ## Remarks This method shuts down the server. Calling this method is equivalent to calling [stop_listening](#stop_listening-method-dtlsserver-struct) and then breaking every client connection by calling [disconnect](#disconnect-method-dtlsserver-struct). # start_listening method ([DTLSServer](#struct-ipworksdtlsserver) Struct) This method starts listening for incoming connections. ## Syntax *Rust Syntax* ```text fn start_listening(&self) -> Result<(), IPWorksError> ``` ## Remarks This method begins listening for incoming connections on the port specified by [local_port](#local_port-property-dtlsserver-struct). Once listening, events will fire as new clients connect and data are transferred. To stop listening for new connections, call [stop_listening](#stop_listening-method-dtlsserver-struct). To stop listening for new connections and to disconnect all existing clients, call [shutdown](#shutdown-method-dtlsserver-struct). # stop_listening method ([DTLSServer](#struct-ipworksdtlsserver) Struct) This method stops listening for new connections. ## Syntax *Rust Syntax* ```text fn stop_listening(&self) -> Result<(), IPWorksError> ``` ## Remarks This method stops listening for new connections. After being called, any new connection attempts will be rejected. Calling this method does not disconnect existing connections. To stop listening and to disconnect all existing clients, call [shutdown](#shutdown-method-dtlsserver-struct) instead. # on_connected event ([DTLSServer](#struct-ipworksdtlsserver) Struct) This event is fired immediately after a connection completes (or fails). ## Syntax *Rust Syntax* ```text // DTLSServerConnectedEventArgs carries the DTLSServer Connected event's parameters. pub struct DTLSServerConnectedEventArgs { fn connection_id(&self) -> i32 fn source_addr(&self) -> &String fn source_port(&self) -> i32 fn status_code(&self) -> i32 fn description(&self) -> &String } // DTLSServerConnectedEvent defines the signature of the DTLSServer Connected event's handler function. pub trait DTLSServerConnectedEvent { fn on_connected(&self, sender : DTLSServer, e : &mut DTLSServerConnectedEventArgs); } impl <'a> DTLSServer<'a> { pub fn on_connected(&self) -> &'a dyn DTLSServerConnectedEvent; pub fn set_on_connected(&mut self, value : &'a dyn DTLSServerConnectedEvent); ... } ``` ## Remarks This event is fired immediately after a connection completes (or fails). The *connection_id* parameter indicates the unique ID assigned to this connection. *source_addr* contains the IP number (Internet address) of the remote party, and *source_port* contains the port from which the packet originated. If the connection is made normally, *status_code* is 0 and *description* is "OK". If the connection fails, *status_code* has the error code returned by the system. *description* contains a description of this code. The value of *status_code* is equal to the value of the system error. Please refer to the [Error Codes](#trappable-errors-dtlsserver-struct) section for more information. # on_connection_request event ([DTLSServer](#struct-ipworksdtlsserver) Struct) This event is fired when a request for connection comes from a remote host. ## Syntax *Rust Syntax* ```text // DTLSServerConnectionRequestEventArgs carries the DTLSServer ConnectionRequest event's parameters. pub struct DTLSServerConnectionRequestEventArgs { fn address(&self) -> &String fn port(&self) -> i32 fn accept(&self) -> bool fn set_accept(&self, value : bool) } // DTLSServerConnectionRequestEvent defines the signature of the DTLSServer ConnectionRequest event's handler function. pub trait DTLSServerConnectionRequestEvent { fn on_connection_request(&self, sender : DTLSServer, e : &mut DTLSServerConnectionRequestEventArgs); } impl <'a> DTLSServer<'a> { pub fn on_connection_request(&self) -> &'a dyn DTLSServerConnectionRequestEvent; pub fn set_on_connection_request(&mut self, value : &'a dyn DTLSServerConnectionRequestEvent); ... } ``` ## Remarks This event indicates an incoming connection. The connection is accepted by default. *address* and *port* will contain information about the remote host requesting the inbound connection. If you want to refuse it, you can set the *accept* parameter to False. # on_data_in event ([DTLSServer](#struct-ipworksdtlsserver) Struct) This event is fired when data is received. ## Syntax *Rust Syntax* ```text // DTLSServerDataInEventArgs carries the DTLSServer DataIn event's parameters. pub struct DTLSServerDataInEventArgs { fn connection_id(&self) -> i32 fn datagram(&self) -> &[u8] } // DTLSServerDataInEvent defines the signature of the DTLSServer DataIn event's handler function. pub trait DTLSServerDataInEvent { fn on_data_in(&self, sender : DTLSServer, e : &mut DTLSServerDataInEventArgs); } impl <'a> DTLSServer<'a> { pub fn on_data_in(&self) -> &'a dyn DTLSServerDataInEvent; pub fn set_on_data_in(&mut self, value : &'a dyn DTLSServerDataInEvent); ... } ``` ## Remarks The on_data_in event is fired every time a new datagram is received. *connection_id* indicates the unique Id of the DTLSConnection from which the packet originated. *datagram* contains the packet as sent by the remote host. NOTE: Events are not re-entrant. Performing time-consuming operations within this event will prevent it from firing again in a timely manner and may affect overall performance. # on_disconnected event ([DTLSServer](#struct-ipworksdtlsserver) Struct) This event is fired when a connection is closed. ## Syntax *Rust Syntax* ```text // DTLSServerDisconnectedEventArgs carries the DTLSServer Disconnected event's parameters. pub struct DTLSServerDisconnectedEventArgs { fn connection_id(&self) -> i32 fn status_code(&self) -> i32 fn description(&self) -> &String } // DTLSServerDisconnectedEvent defines the signature of the DTLSServer Disconnected event's handler function. pub trait DTLSServerDisconnectedEvent { fn on_disconnected(&self, sender : DTLSServer, e : &mut DTLSServerDisconnectedEventArgs); } impl <'a> DTLSServer<'a> { pub fn on_disconnected(&self) -> &'a dyn DTLSServerDisconnectedEvent; pub fn set_on_disconnected(&mut self, value : &'a dyn DTLSServerDisconnectedEvent); ... } ``` ## Remarks If the connection is broken normally, *status_code* is 0, and *description* is "OK". If the connection is broken for any other reason, *status_code* has the error code returned by the system. *description* contains a description of this code. The value of *status_code* is equal to the value of the system error. Please refer to the [Error Codes](#trappable-errors-dtlsserver-struct) section for more information. # on_error event ([DTLSServer](#struct-ipworksdtlsserver) Struct) This event fires information about errors during data delivery. ## Syntax *Rust Syntax* ```text // DTLSServerErrorEventArgs carries the DTLSServer Error event's parameters. pub struct DTLSServerErrorEventArgs { fn connection_id(&self) -> i32 fn error_code(&self) -> i32 fn description(&self) -> &String } // DTLSServerErrorEvent defines the signature of the DTLSServer Error event's handler function. pub trait DTLSServerErrorEvent { fn on_error(&self, sender : DTLSServer, e : &mut DTLSServerErrorEventArgs); } impl <'a> DTLSServer<'a> { pub fn on_error(&self) -> &'a dyn DTLSServerErrorEvent; pub fn set_on_error(&mut self, value : &'a dyn DTLSServerErrorEvent); ... } ``` ## Remarks The on_error event is fired in case of exceptional conditions during message processing. Normally, the struct fails with an error. *error_code* contains an error code and *description* contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to the [Error Codes](#trappable-errors-dtlsserver-struct) section. *connection_id* indicates the connection for which the error is applicable. # on_log event ([DTLSServer](#struct-ipworksdtlsserver) Struct) This event fires once for each log message. ## Syntax *Rust Syntax* ```text // DTLSServerLogEventArgs carries the DTLSServer Log event's parameters. pub struct DTLSServerLogEventArgs { fn connection_id(&self) -> i32 fn log_level(&self) -> i32 fn message(&self) -> &String fn log_type(&self) -> &String } // DTLSServerLogEvent defines the signature of the DTLSServer Log event's handler function. pub trait DTLSServerLogEvent { fn on_log(&self, sender : DTLSServer, e : &mut DTLSServerLogEventArgs); } impl <'a> DTLSServer<'a> { pub fn on_log(&self) -> &'a dyn DTLSServerLogEvent; pub fn set_on_log(&mut self, value : &'a dyn DTLSServerLogEvent); ... } ``` ## Remarks This event fires once for each log message generated by the struct. The verbosity is controlled by the [LogLevel](#LogLevel) setting. *connection_id* identifies the connection to which the log message applies. *log_level* indicates the detail level of the message. Possible values are as follows: | | | | --- | --- | | 0 (None) | No events are logged. | | 1 (Info - default) | Informational events are logged. | | 2 (Verbose) | Detailed data are logged. | | 3 (Debug) | Debug data are logged. | *message* is the log entry. *log_type* identifies the type of log entry. Possible values are as follows: - "Info" - "Error" - "Verbose" - "Debug" # on_ssl_client_authentication event ([DTLSServer](#struct-ipworksdtlsserver) Struct) This event is fired when the client presents its credentials to the server. ## Syntax *Rust Syntax* ```text // DTLSServerSSLClientAuthenticationEventArgs carries the DTLSServer SSLClientAuthentication event's parameters. pub struct DTLSServerSSLClientAuthenticationEventArgs { fn connection_id(&self) -> i32 fn cert_encoded(&self) -> &[u8] fn cert_subject(&self) -> &String fn cert_issuer(&self) -> &String fn status(&self) -> &String fn accept(&self) -> bool fn set_accept(&self, value : bool) } // DTLSServerSSLClientAuthenticationEvent defines the signature of the DTLSServer SSLClientAuthentication event's handler function. pub trait DTLSServerSSLClientAuthenticationEvent { fn on_ssl_client_authentication(&self, sender : DTLSServer, e : &mut DTLSServerSSLClientAuthenticationEventArgs); } impl <'a> DTLSServer<'a> { pub fn on_ssl_client_authentication(&self) -> &'a dyn DTLSServerSSLClientAuthenticationEvent; pub fn set_on_ssl_client_authentication(&mut self, value : &'a dyn DTLSServerSSLClientAuthenticationEvent); ... } ``` ## Remarks This event enables the server to decide whether or not to continue. The *accept* parameter is a recommendation on whether to continue or to close the connection. This is just a suggestion: application software must use its own logic to determine whether or not to continue. When *accept* is False, *status* shows why the verification failed (otherwise, *status* contains the string "OK"). # on_ssl_status event ([DTLSServer](#struct-ipworksdtlsserver) Struct) This event is fired to show the progress of the secure connection. ## Syntax *Rust Syntax* ```text // DTLSServerSSLStatusEventArgs carries the DTLSServer SSLStatus event's parameters. pub struct DTLSServerSSLStatusEventArgs { fn connection_id(&self) -> i32 fn message(&self) -> &String } // DTLSServerSSLStatusEvent defines the signature of the DTLSServer SSLStatus event's handler function. pub trait DTLSServerSSLStatusEvent { fn on_ssl_status(&self, sender : DTLSServer, e : &mut DTLSServerSSLStatusEventArgs); } impl <'a> DTLSServer<'a> { pub fn on_ssl_status(&self) -> &'a dyn DTLSServerSSLStatusEvent; pub fn set_on_ssl_status(&mut self, value : &'a dyn DTLSServerSSLStatusEvent); ... } ``` ## Remarks The event is fired for informational and logging purposes only. It is used to track the progress of the connection. # Config Settings ([DTLSServer](#struct-ipworksdtlsserver) Struct) The struct 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 struct, access to these *internal properties* is provided through the [config](#config-method-dtlsserver-struct) method. ### DTLSServer Config Settings **KeepAliveInterval**: The retry interval, in seconds, to be used when a HeartbeatRequest is sent and no response is received.This configuration specifies the retry interval, in seconds, to be used when a HeartbeatRequest message is sent and no response is received. HeartbeatRequest messages are only sent if the Heartbeat Extension is supported by the remote host. The struct will send a HeartbeatRequest message after a specified period of inactivity, defined by [KeepAliveTime](#KeepAliveTime). This value specifies the interval at which the struct sends successive HeartbeatRequest messages, assuming no response is received from the remote host (HeartbeatResponse). By default, this value is 2 seconds and will only apply if [keep_alive](#keep_alive-property-dtlsserver-struct) is true. **KeepAliveMode**: Specifies the Heartbeat (or keep-alive) mode to be used by the struct.This configuration specifies the Heartbeat (or keep-alive) mode to be used by the struct, as defined in RFC 6520. When [keep_alive](#keep_alive-property-dtlsserver-struct) is true, the following values are applicable: | | | | --- | --- | | 1 | peer_allowed_to_send (default) | | 2 | peer_not_allowed_to_send | When set to 1 (peer_allowed_to_send), the struct can both a) send HeartbeatRequest messages and b) receive and respond to HeartbeatRequest messages. When set to 2 (peer_not_allowed_to_send), the struct will only be capable of sending HeartbeatRequests. Note, if [keep_alive](#keep_alive-property-dtlsserver-struct) is false, Heartbeat functionality will be disabled. The struct will not be capable of sending or handling HeartbeatRequest messages. **KeepAliveTime**: The inactivity time, in seconds, before a HeartbeatRequest is sent.This configuration specifies the inactivity time, in seconds, before sending a HeartbeatRequest message. HeartbeatRequest messages are only sent if the Heartbeat Extension is supported by the remote host. If the connection is inactive for the specified time, the struct will send a HeartbeatRequest message to the remote host. If no response is received, the struct will continue sending Heartbeats every [KeepAliveInterval](#KeepAliveInterval) seconds. By default, this value is 60 seconds and will only apply if [keep_alive](#keep_alive-property-dtlsserver-struct) is true. **LogLevel**: This configuration controls the level of detail that is logged through the Log event.This configuration controls the level of detail that is logged through the [on_log](#on_log-event-dtlsserver-struct) event. Possible values are as follows: | | | | --- | --- | | 0 (None) | No events are logged. | | 1 (Info - default) | Informational events are logged. | | 2 (Verbose) | Detailed data are logged. | | 3 (Debug) | Debug data are logged. | **MaxConnections**: Specifies the maximum number of simultaneous connections the server can maintain.This configuration specifies the maximum number of simultaneous connections the server can maintain. While there is no predefined limit on the maximum number of simultaneous connections, please use caution when increasing the value of this configuration. ### UDP Config Settings **CaptureIPPacketInfo**: Used to capture the packet information.If this configuration setting is set to True, the component will capture the IP packet information. The default value for this setting is False. NOTE: This setting is available only in Windows. **DelayHostResolution**: Whether the hostname is resolved when RemoteHost is set.This configuration setting specifies whether a hostname is resolved immediately when remote_host is set. If *true* the struct will resolve the hostname and the IP address will be present in the remote_host property. If *false*, the hostname is not resolved until needed by the component when a method to connect or send data is called. If desired, resolve_remote_host may be called to manually resolve the value in remote_host at any time. The default value is *false*. **DestinationAddress**: Used to get the destination address from the packet information.If [CaptureIPPacketInfo](#CaptureIPPacketInfo) is set to True, then this will be populated with the packet's destination address when a packet is received. This information will be accessible in the DataIn event. NOTE: This setting is available only in Windows. **DontFragment**: Used to set the Don't Fragment flag of outgoing packets.When this configuration setting is set to True, packets sent by the struct will have the *Don't Fragment* flag set. The default value is False. **LocalHost**: The name of the local host through which connections are initiated or accepted. The [local_host](#local_host-property-dtlsserver-struct) 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 struct initiate connections (or accept in the case of server structs) only through that interface. If the struct is connected, the [local_host](#local_host-property-dtlsserver-struct) 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 struct binds. This configuration setting must be set before a connection is attempted. It instructs the struct 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 [local_port](#local_port-property-dtlsserver-struct) after the connection is established. [local_port](#local_port-property-dtlsserver-struct) 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. **MaxPacketSize**: The maximum length of the packets that can be received.This configuration setting specifies the maximum size of the datagrams that the struct will accept without truncation. **QOSDSCPValue**: Used to specify an arbitrary QOS/DSCP setting (optional).To use this configuration setting, [UseConnection](#UseConnection) must be True. This option allows you to specify an arbitrary DiffServ Code Point (DSCP) value between 0 and 63. The default is 0. When set to the default value, the component will not set a DSCP value. NOTE: This setting uses the qWAVE API and is available only on Windows 7, Windows Server 2008 R2, and later. **QOSTrafficType**: Used to specify QOS/DSCP settings (optional).To use this configuration setting, [UseConnection](#UseConnection) must be True. You may specify either the text or integer values: BestEffort (0), Background (1), ExcellentEffort (2), AudioVideo (3), Voice (4), and Control (5). NOTE: This setting uses the qWAVE API and is available only on Windows Vista and Windows Server 2008 or above. NOTE: QOSTrafficType must be set before setting active to True. **ShareLocalPort**: If set to True, allows more than one instance of the struct to be active on the same local port.This option must be set before the struct is activated through the active property or it will have no effect. The default value for this setting is False. **UseConnection**: Determines whether to use a connected socket.[UseConnection](#UseConnection) specifies whether or not the struct should use a connected socket. The connection is defined as an association in between the local address/port and the remote address/port. As such, this is not a connection in the traditional Transmission Control Protocol (TCP) sense. It means only that the struct will send and receive data to and from the specified destination. The default value for this setting is False. **UseIPv6**: Whether or not to use IPv6.By default, the component expects an IPv4 address for local and remote host properties and will create an IPv4 socket. To use IPv6 instead, set this to True. ### Socket Config Settings **AbsoluteTimeout**: Determines whether timeouts are inactivity timeouts or absolute timeouts.If [AbsoluteTimeout](#AbsoluteTimeout) is set to True, any method that does not complete within timeout seconds will be aborted. By default, *AbsoluteTimeout* is False, and the timeout is an inactivity timeout. NOTE: This option is not valid for User Datagram Protocol (UDP) ports. **FirewallData**: Used to send extra data to the firewall.When the firewall is a tunneling proxy, use this property to send custom (additional) headers to the firewall (e.g., headers for custom authentication schemes). **InBufferSize**: The size in bytes of the incoming queue of the socket.This is the size of an internal queue in the Transmission Control Protocol (TCP)/IP stack. You can increase or decrease its size depending on the amount of data that you will be receiving. In some cases, increasing the value of the *InBufferSize* setting can provide significant improvements in performance. Some TCP/IP implementations do not support variable buffer sizes. If that is the case, when the struct 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 struct is activated the *OutBufferSize* reverts to its defined size. The same happens if you attempt to make it too large or too small. ### SSL Config Settings **LogSSLPackets**: Controls whether SSL packets are logged.This configuration setting controls whether 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 [on_ssl_status](#on_ssl_status-event-dtlsserver-struct) event, which will fire each time a SSL packet is sent or received. **ReuseSSLSession**: Determines if the SSL session is reused. If set to True, the struct 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 struct is the same. **SSLCACerts**: A newline separated list of CA certificates to be included when performing an SSL handshake.When ssl_provider is set to *Internal*, this configuration setting specifies one or more CA certificates to be included with the ssl_cert property. Some servers or clients require the entire chain, including CA certificates, to be presented when performing SSL authentication. The value of this configuration setting is a newline-separated (CR/LF) list of certificates. For instance: ```text -----BEGIN CERTIFICATE----- MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw ... Intermediate Cert ... eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w F0I1XhM+pKj7FjDr+XNj -----END CERTIFICATE----- \r \n -----BEGIN CERTIFICATE----- MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp ... Root Cert ... d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA -----END CERTIFICATE----- ``` **SSLCheckCRL**: Whether to check the Certificate Revocation List for the server certificate.This configuration setting specifies whether the struct will check the Certificate Revocation List (CRL) specified by the server certificate. If set to 1 or 2, the struct will first obtain the list of CRL URLs from the server certificate's CRL distribution points extension. The struct 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 struct fails with an error. When set to 0 (default), the CRL check will not be performed by the struct. 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 struct will use OCSP to check the validity of the server certificate. If set to 1 or 2, the struct will first obtain the Online Certificate Status Protocol (OCSP) URL from the server certificate's OCSP extension. The struct 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 struct fails with an error. When set to 0 (default), the struct 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 [on_ssl_status](#on_ssl_status-event-dtlsserver-struct) event. Use this configuration setting with caution. Requesting a lower cipher strength than necessary could potentially cause serious security vulnerabilities in your application. When the provider is OpenSSL, [SSLCipherStrength](#SSLCipherStrength) is currently not supported. This functionality is instead made available through the [OpenSSLCipherList](#OpenSSLCipherList) configuration setting. **SSLClientCACerts**: A newline separated list of CA certificates to use during SSL client certificate validation.This configuration setting is only applicable to server components (e.g., TCPServer) see [SSLServerCACerts](#SSLServerCACerts) for client components (e.g., TCPClient). This setting can be used to optionally specify one or more CA certificates to be used when verifying the client certificate that is presented by the client during the SSL handshake when [ssl_authenticate_clients](#ssl_authenticate_clients-property-dtlsserver-struct) is enabled. When verifying the client's certificate, the certificates trusted by the system will be used as part of the verification process. If the client's CA certificates are not installed to the trusted system store, they may be specified here so they are included when performing the verification process. This configuration setting should be set only if the client's CA certificates are not already trusted on the system and cannot be installed to the trusted system store. The value of this configuration setting is a newline-separated (CR/LF) list of certificates. For instance: ```text -----BEGIN CERTIFICATE----- MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw ... Intermediate Cert ... eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w F0I1XhM+pKj7FjDr+XNj -----END CERTIFICATE----- \r \n -----BEGIN CERTIFICATE----- MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp ... Root Cert ... d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA -----END CERTIFICATE----- ``` **SSLEnabledCipherSuites**: Specifies the cipher suites to be used during TLS negotiation.This configuration is used to specify the cipher suites to be used during TLS negotiation. By default, the enabled cipher suites will include all available ciphers ("*"). The special value "*" means that the struct will pick all of the supported cipher suites. If [SSLEnabledCipherSuites](#SSLEnabledCipherSuites) is set to any other value, only the specified cipher suites will be considered. Multiple cipher suites are separated by semicolons. For example: ```text obj.config("SSLEnabledCipherSuites=*"); obj.config("SSLEnabledCipherSuites=TLS_DHE_DSS_WITH_AES_128_CBC_SHA"); obj.config("SSLEnabledCipherSuites=TLS_DHE_DSS_WITH_AES_128_CBC_SHA;TLS_ECDH_RSA_WITH_AES_128_CBC_SHA"); ``` Possible cipher suites 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 **SSLEnabledProtocols**: Used to enable/disable the supported security protocols.This configuration setting is used to enable or disable the supported security protocols. The default value is *3072*. To specify a combination of enabled protocol versions set this config to the binary *OR* of one or more of the following values: | | | | --- | --- | | TLS1.2 | 3072 (Hex C00) (Default - Client and Server) | **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 ssl_provider is set to *Internal*. **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 struct 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 struct will only append, it will not overwrite previous values. NOTE: This configuration setting is applicable only when ssl_provider is set to *Internal*. **SSLNegotiatedCipher**: Returns the negotiated cipher suite.This configuration setting returns the cipher suite negotiated during the SSL handshake. NOTE: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example: ```csharp server.Config("SSLNegotiatedCipher[connId]"); ``` **SSLNegotiatedCipherStrength**: Returns the negotiated cipher suite strength.This configuration setting returns the strength of the cipher suite negotiated during the SSL handshake. NOTE: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example: ```csharp server.Config("SSLNegotiatedCipherStrength[connId]"); ``` **SSLNegotiatedCipherSuite**: Returns the negotiated cipher suite.This configuration setting returns the cipher suite negotiated during the SSL handshake represented as a single string. NOTE: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example: ```csharp server.Config("SSLNegotiatedCipherSuite[connId]"); ``` **SSLNegotiatedKeyExchange**: Returns the negotiated key exchange algorithm.This configuration setting returns the key exchange algorithm negotiated during the SSL handshake. NOTE: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example: ```csharp server.Config("SSLNegotiatedKeyExchange[connId]"); ``` **SSLNegotiatedKeyExchangeStrength**: Returns the negotiated key exchange algorithm strength.This configuration setting returns the strength of the key exchange algorithm negotiated during the SSL handshake. NOTE: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example: ```csharp server.Config("SSLNegotiatedKeyExchangeStrength[connId]"); ``` **SSLNegotiatedVersion**: Returns the negotiated protocol version.This configuration setting returns the protocol version negotiated during the SSL handshake. NOTE: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example: ```csharp server.Config("SSLNegotiatedVersion[connId]"); ``` **SSLSecurityFlags**: Flags that control certificate verification.The following flags are defined (specified in hexadecimal notation). They can be ORed together to exclude multiple conditions: | | | | --- | --- | | 0x00000001 | Ignore time validity status of certificate. | | 0x00000002 | Ignore time validity status of CTL. | | 0x00000004 | Ignore non-nested certificate times. | | 0x00000010 | Allow unknown certificate authority. | | 0x00000020 | Ignore wrong certificate usage. | | 0x00000100 | Ignore unknown certificate revocation status. | | 0x00000200 | Ignore unknown CTL signer revocation status. | | 0x00000400 | Ignore unknown certificate authority revocation status. | | 0x00000800 | Ignore unknown root revocation status. | | 0x00008000 | Allow test root certificate. | | 0x00004000 | Trust test root certificate. | | 0x80000000 | Ignore non-matching CN (certificate CN non-matching server name). | This functionality is currently not available when the provider is OpenSSL. **SSLServerCACerts**: A newline separated list of CA certificates to use during SSL server certificate validation.This configuration setting is only used by client components (e.g., TCPClient) see [SSLClientCACerts](#SSLClientCACerts) for server components (e.g., TCPServer). This configuration setting can be used to optionally specify one or more CA certificates to be used when connecting to the server and verifying the server certificate. When verifying the server's certificate, the certificates trusted by the system will be used as part of the verification process. If the server's CA certificates are not installed to the trusted system store, they may be specified here so they are included when performing the verification process. This configuration setting should be set only if the server's CA certificates are not already trusted on the system and cannot be installed to the trusted system store. The value of this configuration setting is a newline-separated (CR/LF) list of certificates. For instance: ```text -----BEGIN CERTIFICATE----- MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw ... Intermediate Cert... eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w F0I1XhM+pKj7FjDr+XNj -----END CERTIFICATE----- \r \n -----BEGIN CERTIFICATE----- MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp ... Root Cert... d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA -----END CERTIFICATE----- ``` **TLS12SignatureAlgorithms**: Defines the allowed TLS 1.2 signature algorithms when SSLProvider is set to Internal.This configuration setting specifies the allowed server certificate signature algorithms when ssl_provider is set to *Internal* and [SSLEnabledProtocols](#SSLEnabledProtocols) is set to allow TLS 1.2. When specified the struct 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 struct fails with an error. The format of this value is a comma-separated list of hash-signature combinations. For instance: ```csharp component.SSLProvider = TCPClientSSLProviders.sslpInternal; component.Config("SSLEnabledProtocols=3072"); //TLS 1.2 component.Config("TLS12SignatureAlgorithms=sha256-rsa,sha256-dsa,sha1-rsa,sha1-dsa"); ``` The default value for this configuration setting is *sha512-ecdsa,sha512-rsa,sha512-dsa,sha384-ecdsa,sha384-rsa,sha384-dsa,sha256-ecdsa,sha256-rsa,sha256-dsa,sha224-ecdsa,sha224-rsa,sha224-dsa,sha1-ecdsa,sha1-rsa,sha1-dsa*. To not restrict the server's certificate signature algorithm, specify an empty string as the value for this configuration setting, which will cause the signature_algorithms TLS 1.2 extension to not be sent. **TLS12SupportedGroups**: The supported groups for ECC.This configuration setting specifies a comma-separated list of named groups used in TLS 1.2 for ECC. The default value is *ecdhe_secp256r1,ecdhe_secp384r1,ecdhe_secp521r1*. When using TLS 1.2 and ssl_provider 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) ### 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. **CodePage**: The system code page used for Unicode to Multibyte translations.The default code page is Unicode UTF-8 (65001). The following is a list of valid code page identifiers: | | | | --- | --- | | Identifier | Name | | 037 | IBM EBCDIC - U.S./Canada | | 437 | OEM - United States | | 500 | IBM EBCDIC - International | | 708 | Arabic - ASMO 708 | | 709 | Arabic - ASMO 449+, BCON V4 | | 710 | Arabic - Transparent Arabic | | 720 | Arabic - Transparent ASMO | | 737 | OEM - Greek (formerly 437G) | | 775 | OEM - Baltic | | 850 | OEM - Multilingual Latin I | | 852 | OEM - Latin II | | 855 | OEM - Cyrillic (primarily Russian) | | 857 | OEM - Turkish | | 858 | OEM - Multilingual Latin I + Euro symbol | | 860 | OEM - Portuguese | | 861 | OEM - Icelandic | | 862 | OEM - Hebrew | | 863 | OEM - Canadian-French | | 864 | OEM - Arabic | | 865 | OEM - Nordic | | 866 | OEM - Russian | | 869 | OEM - Modern Greek | | 870 | IBM EBCDIC - Multilingual/ROECE (Latin-2) | | 874 | ANSI/OEM - Thai (same as 28605, ISO 8859-15) | | 875 | IBM EBCDIC - Modern Greek | | 932 | ANSI/OEM - Japanese, Shift-JIS | | 936 | ANSI/OEM - Simplified Chinese (PRC, Singapore) | | 949 | ANSI/OEM - Korean (Unified Hangul Code) | | 950 | ANSI/OEM - Traditional Chinese (Taiwan; Hong Kong SAR, PRC) | | 1026 | IBM EBCDIC - Turkish (Latin-5) | | 1047 | IBM EBCDIC - Latin 1/Open System | | 1140 | IBM EBCDIC - U.S./Canada (037 + Euro symbol) | | 1141 | IBM EBCDIC - Germany (20273 + Euro symbol) | | 1142 | IBM EBCDIC - Denmark/Norway (20277 + Euro symbol) | | 1143 | IBM EBCDIC - Finland/Sweden (20278 + Euro symbol) | | 1144 | IBM EBCDIC - Italy (20280 + Euro symbol) | | 1145 | IBM EBCDIC - Latin America/Spain (20284 + Euro symbol) | | 1146 | IBM EBCDIC - United Kingdom (20285 + Euro symbol) | | 1147 | IBM EBCDIC - France (20297 + Euro symbol) | | 1148 | IBM EBCDIC - International (500 + Euro symbol) | | 1149 | IBM EBCDIC - Icelandic (20871 + Euro symbol) | | 1200 | Unicode UCS-2 Little-Endian (BMP of ISO 10646) | | 1201 | Unicode UCS-2 Big-Endian | | 1250 | ANSI - Central European | | 1251 | ANSI - Cyrillic | | 1252 | ANSI - Latin I | | 1253 | ANSI - Greek | | 1254 | ANSI - Turkish | | 1255 | ANSI - Hebrew | | 1256 | ANSI - Arabic | | 1257 | ANSI - Baltic | | 1258 | ANSI/OEM - Vietnamese | | 1361 | Korean (Johab) | | 10000 | MAC - Roman | | 10001 | MAC - Japanese | | 10002 | MAC - Traditional Chinese (Big5) | | 10003 | MAC - Korean | | 10004 | MAC - Arabic | | 10005 | MAC - Hebrew | | 10006 | MAC - Greek I | | 10007 | MAC - Cyrillic | | 10008 | MAC - Simplified Chinese (GB 2312) | | 10010 | MAC - Romania | | 10017 | MAC - Ukraine | | 10021 | MAC - Thai | | 10029 | MAC - Latin II | | 10079 | MAC - Icelandic | | 10081 | MAC - Turkish | | 10082 | MAC - Croatia | | 12000 | Unicode UCS-4 Little-Endian | | 12001 | Unicode UCS-4 Big-Endian | | 20000 | CNS - Taiwan | | 20001 | TCA - Taiwan | | 20002 | Eten - Taiwan | | 20003 | IBM5550 - Taiwan | | 20004 | TeleText - Taiwan | | 20005 | Wang - Taiwan | | 20105 | IA5 IRV International Alphabet No. 5 (7-bit) | | 20106 | IA5 German (7-bit) | | 20107 | IA5 Swedish (7-bit) | | 20108 | IA5 Norwegian (7-bit) | | 20127 | US-ASCII (7-bit) | | 20261 | T.61 | | 20269 | ISO 6937 Non-Spacing Accent | | 20273 | IBM EBCDIC - Germany | | 20277 | IBM EBCDIC - Denmark/Norway | | 20278 | IBM EBCDIC - Finland/Sweden | | 20280 | IBM EBCDIC - Italy | | 20284 | IBM EBCDIC - Latin America/Spain | | 20285 | IBM EBCDIC - United Kingdom | | 20290 | IBM EBCDIC - Japanese Katakana Extended | | 20297 | IBM EBCDIC - France | | 20420 | IBM EBCDIC - Arabic | | 20423 | IBM EBCDIC - Greek | | 20424 | IBM EBCDIC - Hebrew | | 20833 | IBM EBCDIC - Korean Extended | | 20838 | IBM EBCDIC - Thai | | 20866 | Russian - KOI8-R | | 20871 | IBM EBCDIC - Icelandic | | 20880 | IBM EBCDIC - Cyrillic (Russian) | | 20905 | IBM EBCDIC - Turkish | | 20924 | IBM EBCDIC - Latin-1/Open System (1047 + Euro symbol) | | 20932 | JIS X 0208-1990 & 0121-1990 | | 20936 | Simplified Chinese (GB2312) | | 21025 | IBM EBCDIC - Cyrillic (Serbian, Bulgarian) | | 21027 | Extended Alpha Lowercase | | 21866 | Ukrainian (KOI8-U) | | 28591 | ISO 8859-1 Latin I | | 28592 | ISO 8859-2 Central Europe | | 28593 | ISO 8859-3 Latin 3 | | 28594 | ISO 8859-4 Baltic | | 28595 | ISO 8859-5 Cyrillic | | 28596 | ISO 8859-6 Arabic | | 28597 | ISO 8859-7 Greek | | 28598 | ISO 8859-8 Hebrew | | 28599 | ISO 8859-9 Latin 5 | | 28605 | ISO 8859-15 Latin 9 | | 29001 | Europa 3 | | 38598 | ISO 8859-8 Hebrew | | 50220 | ISO 2022 Japanese with no halfwidth Katakana | | 50221 | ISO 2022 Japanese with halfwidth Katakana | | 50222 | ISO 2022 Japanese JIS X 0201-1989 | | 50225 | ISO 2022 Korean | | 50227 | ISO 2022 Simplified Chinese | | 50229 | ISO 2022 Traditional Chinese | | 50930 | Japanese (Katakana) Extended | | 50931 | US/Canada and Japanese | | 50933 | Korean Extended and Korean | | 50935 | Simplified Chinese Extended and Simplified Chinese | | 50936 | Simplified Chinese | | 50937 | US/Canada and Traditional Chinese | | 50939 | Japanese (Latin) Extended and Japanese | | 51932 | EUC - Japanese | | 51936 | EUC - Simplified Chinese | | 51949 | EUC - Korean | | 51950 | EUC - Traditional Chinese | | 52936 | HZ-GB2312 Simplified Chinese | | 54936 | Windows XP: GB18030 Simplified Chinese (4 Byte) | | 57002 | ISCII Devanagari | | 57003 | ISCII Bengali | | 57004 | ISCII Tamil | | 57005 | ISCII Telugu | | 57006 | ISCII Assamese | | 57007 | ISCII Oriya | | 57008 | ISCII Kannada | | 57009 | ISCII Malayalam | | 57010 | ISCII Gujarati | | 57011 | ISCII Punjabi | | 65000 | Unicode UTF-7 | | 65001 | Unicode UTF-8 | The following is a list of valid code page identifiers for Mac OS only: | | | | --- | --- | | Identifier | Name | | 1 | ASCII | | 2 | NEXTSTEP | | 3 | JapaneseEUC | | 4 | UTF8 | | 5 | ISOLatin1 | | 6 | Symbol | | 7 | NonLossyASCII | | 8 | ShiftJIS | | 9 | ISOLatin2 | | 10 | Unicode | | 11 | WindowsCP1251 | | 12 | WindowsCP1252 | | 13 | WindowsCP1253 | | 14 | WindowsCP1254 | | 15 | WindowsCP1250 | | 21 | ISO2022JP | | 30 | MacOSRoman | | 10 | UTF16String | | 0x90000100 | UTF16BigEndian | | 0x94000100 | UTF16LittleEndian | | 0x8c000100 | UTF32String | | 0x98000100 | UTF32BigEndian | | 0x9c000100 | UTF32LittleEndian | | 65536 | Proprietary | **LicenseInfo**: Information about the current license.When queried, this setting will return a string containing information about the license this instance of a struct 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*. **UseInternalSecurityAPI**: Whether or not to use the system security libraries or an internal implementation. When set to *false*, the struct will use the system security libraries by default to perform cryptographic functions where applicable. Setting this configuration setting to *true* tells the struct 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. To use the system security libraries for Linux, OpenSSL support must be enabled. For more information on how to enable OpenSSL, please refer to the [OpenSSL Notes](platforms.md) section. # Trappable Errors ([DTLSServer](#struct-ipworksdtlsserver) Struct) ### DTLSServer Errors | | | | --- | --- | | 400 | Invalid datagram received. See the error description for further details. | | 401 | Invalid DTLS flow. See the error description for further details. | | 402 | Not supported. See the error description for further details. | | 403 | DTLS handshake error. See the error description for further details. | | 404 | Invalid certificate provided. See the error description for further details. | | 405 | Fatal alert. See the error description for further details. |