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TCP Service is a network service that uses Transmission Control Protocol (TCP) to communicate with its clients. |
Network Host device driver supports availability/operability monitoring for several TCP services per IP host.
Synchronization Details
Generic TCP Service status is checked during synchronization. The service is deemed Online if all configured services/ports are online.
Status of particular TCP service is checked using one of the three procedures:
| • | TCP connection checking |
| • | immediate reply checking (without sending any data) |
| • | sending data and checking the reply |
Effective check procedure is determined by Send Data property as described below.
Connection Check
Connection check is performed if Send Data is not specified, i.e. is null. The following operations are performed in this case:
| 1. | A TCP connection is established to the associated port of the device. |
| 2. | Response is immediately read. |
The check is deemed succeeded if connection was successfully established. Response is included in result data record, but does not affect status of the service.
Immediate Reply Check
Immediate reply check is performed if Send Data is empty string. The following operations are performed:
| 1. | A TCP connection is established to the associated port of the device. |
| 2. | Response is immediately read. |
The check is deemed succeeded if connection was successfully established and non-empty response received. Response is included in result data record.
Send Data And Reply Check
Send and reply check is performed if Send Data is non-empty string. The following operations are performed:
| 1. | A TCP connection is established to the associated port of the device. |
| 2. | Data specified in service configuration is sent via this connection. |
| 3. | A response is read. |
The check is deemed succeeded if connection was successfully established, the data was successfully sent and non-empty response received. Response is included in result data record.