SNPP Class
Properties Methods Events Configuration Settings Errors
The SNPP Class is used to send pages through the internet using the SNPP protocol.
Syntax
ipworks.snpp()
Remarks
The SNPP class supports both plaintext and SSL/TLS connections. When connecting over SSL/TLS the SSLServerAuthentication event allows you to check the server identity and other security attributes. The SSLStatus event provides information about the SSL handshake. Additional SSL related settings are also supported via the Config method.
It is a client implementation of Simple Network Paging Protocol Version 3 as specified in RFC 1861. Service extensions level 2 are supported intrinsically and the user can access all of level 3 extensions.
SNPP allows for immediate notification of message delivery, gives absolute flexibility over the content sent to the recipient, allows the specification of multiple choice responses, etc.
To send a message the ServerName, recipient's PagerId and Message properties should be filled out (at a minimum). The Send method is then used to deliver the message.
The server's response is given in the PITrail events and by the LastReply property. Customized commands may be sent using the Command property.
Optional properties include: CallerId, ServerPort and LocalHost
Property List
The following is the full list of the properties of the class with short descriptions. Click on the links for further details.
| CallerId | The identifier of the caller. |
| Command | Used to send additional commands directly to the server. |
| Connected | Shows whether the class is connected. |
| FirewallAutoDetect | This property tells the class whether or not to automatically detect and use firewall system settings, if available. |
| FirewallType | This property determines the type of firewall to connect through. |
| FirewallHost | This property contains the name or IP address of firewall (optional). |
| FirewallPassword | This property contains a password if authentication is to be used when connecting through the firewall. |
| FirewallPort | This property contains the TCP port for the firewall Host . |
| FirewallUser | This property contains a user name if authentication is to be used connecting through a firewall. |
| Idle | The current status of the class. |
| LastReply | The last reply from the server. |
| LocalHost | The name of the local host or user-assigned IP interface through which connections are initiated or accepted. |
| Message | The message being sent (alphanumeric). |
| PagerId | The identifying number of the pager to send a Message to. |
| ServerName | The name or address of the SNPP server. |
| ServerPort | The server port for SNPP (default 444). |
| SSLAcceptServerCertEncoded | The certificate (PEM/base64 encoded). |
| SSLCertEncoded | The certificate (PEM/base64 encoded). |
| SSLCertStore | The name of the certificate store for the client certificate. |
| SSLCertStorePassword | If the certificate store is of a type that requires a password, this property is used to specify that password in order to open the certificate store. |
| SSLCertStoreType | The type of certificate store for this certificate. |
| SSLCertSubject | The subject of the certificate used for client authentication. |
| SSLEnabled | Whether TLS/SSL is enabled. |
| SSLServerCertEncoded | The certificate (PEM/base64 encoded). |
| SSLStartMode | Determines how the class starts the SSL negotiation. |
| Timeout | A timeout for the class. |
Method List
The following is the full list of the methods of the class with short descriptions. Click on the links for further details.
| Config | Sets or retrieves a configuration setting. |
| Connect | Connects to an SNPP server. |
| Disconnect | Disconnects from an SNPP gateway. |
| DoEvents | Processes events from the internal message queue. |
| Interrupt | Interrupt the current method. |
| Reset | Resets the server state created during the connection. |
| Send | Sends the current message. |
Event List
The following is the full list of the events fired by the class with short descriptions. Click on the links for further details.
| ConnectionStatus | Fired to indicate changes in connection state. |
| Error | Information about errors during data delivery. |
| PITrail | Traces the commands sent to the server, and the respective replies. |
| SSLServerAuthentication | Fired after the server presents its certificate to the client. |
| SSLStatus | Shows the progress of the secure connection. |
Configuration Settings
The following is a list of configuration settings for the class with short descriptions. Click on the links for further details.
| LoginID | Login ID used to authenticate with an SNPP server. |
| ConnectionTimeout | Sets a separate timeout value for establishing a connection. |
| FirewallAutoDetect | Tells the class whether or not to automatically detect and use firewall system settings, if available. |
| FirewallHost | Name or IP address of firewall (optional). |
| FirewallPassword | Password to be used if authentication is to be used when connecting through the firewall. |
| FirewallPort | The TCP port for the FirewallHost;. |
| FirewallType | Determines the type of firewall to connect through. |
| FirewallUser | A user name if authentication is to be used connecting through a firewall. |
| KeepAliveInterval | The retry interval, in milliseconds, to be used when a TCP keep-alive packet is sent and no response is received. |
| KeepAliveTime | The inactivity time in milliseconds before a TCP keep-alive packet is sent. |
| Linger | When set to True, connections are terminated gracefully. |
| LingerTime | Time in seconds to have the connection linger. |
| LocalHost | The name of the local host through which connections are initiated or accepted. |
| LocalPort | The port in the local host where the class binds. |
| MaxLineLength | The maximum amount of data to accumulate when no EOL is found. |
| MaxTransferRate | The transfer rate limit in bytes per second. |
| ProxyExceptionsList | A semicolon separated list of hosts and IPs to bypass when using a proxy. |
| TCPKeepAlive | Determines whether or not the keep alive socket option is enabled. |
| TcpNoDelay | Whether or not to delay when sending packets. |
| UseIPv6 | Whether to use IPv6. |
| LogSSLPackets | Controls whether SSL packets are logged when using the internal security API. |
| OpenSSLCADir | The path to a directory containing CA certificates. |
| OpenSSLCAFile | Name of the file containing the list of CA's trusted by your application. |
| OpenSSLCipherList | A string that controls the ciphers to be used by SSL. |
| OpenSSLPrngSeedData | The data to seed the pseudo random number generator (PRNG). |
| ReuseSSLSession | Determines if the SSL session is reused. |
| SSLCACertFilePaths | The paths to CA certificate files on Unix/Linux. |
| SSLCACerts | A newline separated list of CA certificate to use during SSL client authentication. |
| SSLCheckCRL | Whether to check the Certificate Revocation List for the server certificate. |
| SSLCipherStrength | The minimum cipher strength used for bulk encryption. |
| SSLEnabledCipherSuites | The cipher suite to be used in an SSL negotiation. |
| SSLEnabledProtocols | Used to enable/disable the supported security protocols. |
| SSLEnableRenegotiation | Whether the renegotiation_info SSL extension is supported. |
| SSLIncludeCertChain | Whether the entire certificate chain is included in the SSLServerAuthentication event. |
| SSLNegotiatedCipher | Returns the negotiated ciphersuite. |
| SSLNegotiatedCipherStrength | Returns the negotiated ciphersuite strength. |
| SSLNegotiatedCipherSuite | Returns the negotiated ciphersuite. |
| SSLNegotiatedKeyExchange | Returns the negotiated key exchange algorithm. |
| SSLNegotiatedKeyExchangeStrength | Returns the negotiated key exchange algorithm strength. |
| SSLNegotiatedVersion | Returns the negotiated protocol version. |
| SSLProvider | The name of the security provider to use. |
| SSLSecurityFlags | Flags that control certificate verification. |
| SSLServerCACerts | A newline separated list of CA certificate to use during SSL server certificate validation. |
| TLS12SignatureAlgorithms | Defines the allowed TLS 1.2 signature algorithms when UseInternalSecurityAPI is True. |
| TLS12SupportedGroups | The supported groups for ECC. |
| TLS13KeyShareGroups | The groups for which to pregenerate key shares. |
| TLS13SignatureAlgorithms | The allowed certificate signature algorithms. |
| TLS13SupportedGroups | The supported groups for (EC)DHE key exchange. |
| AbsoluteTimeout | Determines whether timeouts are inactivity timeouts or absolute timeouts. |
| FirewallData | Used to send extra data to the firewall. |
| InBufferSize | The size in bytes of the incoming queue of the socket. |
| OutBufferSize | The size in bytes of the outgoing queue of the socket. |
| BuildInfo | Information about the product's build. |
| CodePage | The system code page used for Unicode to Multibyte translations. |
| LicenseInfo | Information about the current license. |
| ProcessIdleEvents | Whether the class uses its internal event loop to process events when the main thread is idle. |
| SelectWaitMillis | The length of time in milliseconds the class will wait when DoEvents is called if there are no events to process. |
| UseInternalSecurityAPI | Tells the class whether or not to use the system security libraries or an internal implementation. |