Hello, world!
Now that you’re familiar with the if* structures and their management routines, let’s go through an example. The following function, named em_setup_interface
and defined in /sys/dev/e1000/if_em.c, sets up em(4)
’s ifnet
and ifmedia
structures. (The em(4)
driver is for Intel’s PCI Gigabit Ethernet adapters.)
static int em_setup_interface(device_t dev, struct adapter *adapter) { struct ifnet *ifp; ifp = adapter->ifp = if_alloc(IFT_ETHER); ...
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