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This change adds support for IPv6 while refactoring most of the
original plugin code in the following ways.
- Adhere to vpp style guidelines.
- Split the netlink, node, and tap processing into separate
files named with a "tap_inject" prefix which more accurately
represents the functionality.
- Implement our own tap management and rx/tx. This is to reduce
the overhead of passing packets in and out of vnet tap
devices, in favor of directly reading/writing from the tap.
- Change how nodes work. Now we have neighbor, rx, and tx nodes.
The neighbor node sends ARP replies and ICMP6 neighbor
advertisements to the arp-input and icmp6-neighbor-solicitation
nodes, respectively, before also injecting the packet to the
host, making it possible for both vpp and the host network stack
to resolve the next hop. The tx node injects packets into the
host by writing to the tap. The rx node reads packets from the
tap and sends them on its associated data plane interface.
- Simplify the CLI. Instead of creating taps specifically for
a given interface we create a tap for all of the Ethernet
interfaces with the "enable tap-inject" CLI command. The
interfaces are named with a "vpp" prefix, i.e. "vpp0". Also
add a "disable tap-inject" option.
- Provide ability to enable at configuration time with the
tap-inject { enable } stanza.
Change-Id: I6b56da606e2da1d793ce6aca222fe4eb5a4e070d
Signed-off-by: Jeff Shaw <jeffrey.b.shaw@intel.com>
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Hongjun Ni
Jeff Shaw