dev_set_allmulti — update allmulti count on a device
int dev_set_allmulti ( | struct net_device * dev, |
int inc); |
Add or remove reception of all multicast frames to a device. While the
count in the device remains above zero the interface remains listening
to all interfaces. Once it hits zero the device reverts back to normal
filtering operation. A negative inc value is used to drop the counter
when releasing a resource needing all multicasts.
Return 0 if successful or a negative errno code on error.