MACIOC_GETMCA(7mdi)

MACIOC_GETMCA -- MDI return active multicast addresses ioctl

Description (Not in UnixWare version)

This ioctl requests that the MDI driver return current set of active multicast addresses.

Parameters

The ioctl(S) data contains space into which the MDI driver should copy its multicast address table. The MAC user will usually issue a MACIOC_GETMCSIZ(MDI) ioctl before this to determine the size of the buffer to send down.

Data returned

The MDI driver should fill the ioctl data area with its multicast address table. If the ioctl data area is smaller than is needed, the MDI driver should copy as many entries as possible from its table. If the ioctl data area is larger than is needed, the MDI driver should copy its entire table, and adjust the b_wptr and ioc_count fields to match the size of the data written into the ioctl data.

Version applicability

mdi: 1

Version applicability

mdi: 1

Differences between versions

This function is not supported in MDI on UnixWare systems.

References

Intro(MDI), MACIOC_SETMCA(MDI), MACIOC_GETMCSIZ(MDI), MACIOC_DELMCA(MDI)

``MDI ioctls'' in HDK Technical Reference