Josef Söntgen dd47129bef nic session: link-state change handling ... A Nic::Session client can install a signal handler that is used to propagate changes of the link-state by calling 'link_state_sigh()'. The actual link state is queried via 'link_state()'. The nic-driver interface now provides a Driver_notification callback, which is used to forward link-state changes from the driver to the Nic::Session_component. The following drivers now provide real link state: dde_ipxe, nic_bridge, and usb_drv. Currently, OpenVPN, Linux nic_drv, and lan9118 do not support link state and always report link up. Fixes #1327		2015-03-27 11:53:13 +01:00
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nic.h	nic session: link-state change handling	2015-03-27 11:53:13 +01:00