... Keywords: network driver prototype functions . ... Usual interrupt conditions are data to be rec'd, transmit completed, error conditions being reported. ... It pulls the data off the card, packages it into a sk_buff and lets the kernel know the data is there for it by doing a netif_rx(sk_buff) 5) Open function linked to dev->open and called by the networking layers when somebody does "ifconfig <device_name> up" -- this puts the device on line and enables it for Rx/Tx of data. ...