table of contents
|NG_EIFACE(4)||Device Drivers Manual||NG_EIFACE(4)|
generic Ethernet interface netgraph node type
The eiface netgraph node implements the
generic Ethernet interface. When an eiface node is
created, a new interface appears which is accessible via
ifconfig(8). These interfaces are named
ngeth1”, etc. When a node is shut
down, the corresponding interface is removed, and the interface name becomes
available for reuse by future eiface nodes. New nodes
always take the first unused interface.
An eiface node has a single hook named ether, which should be connected to the Ethernet downstream, for example, to the ng_vlan(4) node. Packets transmitted via the interface flow out this hook. Similarly, packets received on the hook go to the protocol stack as packets received by any real Ethernet interface.
This node type supports the generic control messages, plus the following:
- Set link-level address of the interface. Requires struct
ether_addr as an argument. This message also has an ASCII version,
set”, which requires as an argument an ASCII string consisting of 6 colon-separated hex digits.
- Return the name of the associated interface as a
NULL-terminated ASCII string.
- Return the list of link-level addresses associated with the node.
This node shuts down upon receipt of a
NGM_SHUTDOWN control message. The associated
interface is removed and its name becomes available for reuse by future
Unlike most other node types, an
eiface node does
not go away when all
hooks have been disconnected; rather, an explicit
NGM_SHUTDOWN control message is required.
netgraph(4), ng_ether(4), ng_iface(4), ng_vlan(4), ifconfig(8), ngctl(8)
The eiface node type was implemented in FreeBSD 4.6.
The eiface node type was written by Vitaly V Belekhov. This manual page was written by Gleb Smirnoff.
|May 14, 2019||Debian|