System and method for acquiring and correction lifetime information within SA information when transitioning between power modes

摘要

A communication apparatus that is capable of enabling communication even when IPsec life time information is taken over. The communication apparatus is connected to a network via a network interface device and operates in a first power mode or a second power mode with less power consumption. A notification unit notifies the network interface device of IPsec life time information when shifting to the second power mode from the first power mode. A storage unit stores first time information showing time of shifting to the second power mode from the first power mode. An acquisition unit acquires the life time information from the network interface device when shifting to the first power mode from the second power mode. A correction unit corrects the life time information based on second time information showing time of shifting to the first power mode from the second power mode and the first time information.

主权项

1. A communication apparatus, having a network interface device, that is capable of executing IPsec communication through the network interface device with an external apparatus on a network, the communication apparatus comprising:
a memory device; a processor; a notification unit configured to notify the network interface device of SA information used for executing the IPsec communication, in a case where the communication apparatus shifts from a first power mode to a second power mode having less power consumption than the first power mode; an acquisition unit configured to acquire, from the network interface device, the SA information, during a shift of the communication apparatus from the second power mode to the first power mode; and a correction unit configured to correct a life time included in the SA information acquired by the acquisition unit, the correction of the life time included in the SA information occurring upon the communication apparatus shifting from the second power mode to the first power mode and before a subsequent shift from the first power mode to the second power mode, wherein the notification unit, the acquisition unit, and the correction unit are implemented by the processor executing at least one program recorded on the memory device.