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ng_hub — packet distribution netgraph node type
The hub node type provides a simple mechanism for distributing packets over several links. Packets received on any of the hooks are forwarded out the other hooks. Packets are not altered in any way.
A hub node accepts any request to connect, regardless of the hook name, as long as the name is unique.
This node type supports the generic control messages, plus the following: NGM_HUB_SET_PERSISTENT (setpersistent) This command sets the persistent flag on the node, and takes no arguments.
This node shuts down upon receipt of a NGM_SHUTDOWN control message, or when all hooks have been disconnected. Setting the persistent flag via a NGM_HUB_SET_PERSISTENT control message disables automatic node shutdown when the last hook gets disconnected.
The ng_hub node type appeared in FreeBSD 5.3.
Ruslan Ermilov <ru@FreeBSD.org>