openflow: Add Vendor event #146
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(This is more like an RFC than a pull request.)
I read how nicira.py supports vendor extensions. It seems it installs a new general openflow handler. I think in most cases there's a simpler way: the default handler should just raise an event for unknown vendor messages, which extension writers could easily catch.
This patch adds support for raising an event when receiving an OFPT_VENDOR message.