IPDaemon Configuration
The class 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 class, access to these internal properties is provided through the Config method.IPDaemon Configuration Settings
| BindExclusively: Whether or not the component considers a local port reserved for exclusive use. If this is true (default), the component will bind to the local port with the ExclusiveAddressUse option set, meaning that nothing else can bind to the same port. Also the component will not be able to bind to local ports that are already in use by some other instance and attempts to do so will result in failure. | |
| InBufferSize: The size in bytes of the incoming 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 receiving. Increasing the value of the
InBufferSize setting can provide significant improvements in
performance in some cases.
Some TCP/IP implementations do not support variable buffer sizes. If that is the case, when the class is activated the InBufferSize reverts to its defined size. The same happens if you attempt to make it too large or too small. InBufferSize is shared among incoming connections. When the property is set, the corresponding value is set for incoming connections as they are accepted. Existing connections are not modified. | |
| MaxConnections: The maximum number of connections available.
The maximum number of connections available. This property must be set before Listening is set
to True, and once set, it can no longer be changed for the current instance of the class.
The maximum value for this setting is 100,000 connections.
Use this setting with caution. Extremely large values may impact performance.
The default value is 1000.
Note: Unix/Linux operating systems limit the number of simultaneous connections to 1024. | |
| 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. Increasing the value of the
OutBufferSize setting can provide significant improvements in
performance in some cases.
Some TCP/IP implementations do not support variable buffer sizes. If that is the case, when the class is activated the OutBufferSize reverts to its defined size. The same happens if you attempt to make it too large or too small. OutBufferSize is shared among incoming connections. When the property is set, the corresponding value is set for incoming connections as they are accepted. Existing connections are not modified. | |
| KeepAliveTime: The inactivity time in milliseconds before a TCP keep-alive packet is sent.By default the operating system will determine the
time a connection is idle before a TCP keep-alive packet is sent. This system default if this value is not specified here is 2 hours. In many
cases a shorter interval is more useful. Set this value to the desired interval in milliseconds.
This setting is applicable to all connections.
Note: This value is not applicable in Java. | |
| KeepAliveInterval: The retry interval, in milliseconds, to be used when a TCP keep-alive packet is sent and no response is received.A TCP keep-alive packet will be sent after a period of inactivity as
defined by KeepAliveTime. If no acknowledgement is received from the remote host the keep-alive packet
will be re-sent. This setting specifies the interval at which the successive keep-alive packets are sent in milliseconds.
This system default if this value is not specified here is 1 second.
This setting is applicable to all connections.
Note: This value is not applicable in Java or MAC. | |
| KeepAliveRetryCount: The number of keep-alive packets to be sent before the remotehost is considered disconnected.When set, TCPKeepAlive will automatically be set to true.
A TCP keep-alive packet will be sent after a period of inactivity as
defined by KeepAliveTime. If no acknowledgement is received from the remote host the keep-alive packet
will be re-sent. This setting specifies the number of times that the keep-alive packets will be re-sent before the remote host
is considered disconnected.
The system default if this value is not specified here is 9.
Note: This configuration setting is only available in the Unix platform, and isn't supported in Mac OS or FreeBSD. | |
| RecordLength[ConnectionId]: The length of received data records.If set to a positive value, this setting defines the length of data records to be received. The class will accumulate data
until RecordLength is reached and only then fire the DataIn event with data of length RecordLength.
This allows data to be received as records of known length. This value can be changed at any time, including within the DataIn event.
The default value is 0, meaning this setting is not used. "ConnectionId" specifies the connection to which the setting applies. | |
| TcpNoDelay: Whether or not to delay when sending packets.
When true, the socket will send all data that is ready to send at once. When
false, the socket will send smaller buffered packets of data at small intervals.
This is known as the Nagle algorithm.
By default, this config is set to false. |
Base Configuration Settings
| SelectWaitMillis: The length of time in milliseconds the class will wait when DoEvents is called if there are no events to process. If there are no events to process when DoEvents is called, the class will wait for the amount of time specified here before returning. The default value is 20. |
Base Configuration Settings
| CodePage: The system code page used for Unicode to Multibyte translations.
The default code page is the Active Code Page (0).
The following is a list of valid code page identifiers:
|