Sample plugin for VPP

Overview

This is the VPP sample plugin demonstrates how to create a new plugin that integrates with VPP. The sample code implements a trival macswap algorithim that demonstrates plugin runtime integration with the VPP graph hierachy, api and cli.

For deeper dive information see the annotations in the sample code itself. See sample.c

How to build and run the sample plugin.

Now (re)build VPP.

    $ make wipe

Define environmental variable 'SAMPLE_PLUGIN=yes' with a process scope

    $ SAMPLE_PLUGIN=yes make build

or a session scope, and build VPP.

    $ export SAMPLE_PLUGIN=yes
    $ make build

Now run VPP and make sure the plugin is loaded.

    $ make run
    ...
    load_one_plugin:184: Loaded plugin: memif_plugin.so (Packet Memory Interface (experimetal))
    load_one_plugin:184: Loaded plugin: sample_plugin.so (Sample of VPP Plugin)
    load_one_plugin:184: Loaded plugin: nat_plugin.so (Network Address Translation)
    ...
    DBGvpp#

How to create a new plugin

To create a new plugin based on the sample plugin, copy and rename the sample plugin directory and automake config.

    cp -r src/examples/sample-plugin/sample src/plugins/newplugin
    cp src/examples/sample-plugin/sample.am src/plugins/newplugin.am

Add the following entry to the plugins section of src/configure.ac.

    PLUGIN_ENABLED(newplugin)

Add the following entry to the plugins section of src/plugins/Makefile.am

    if ENABLE_NEWPLUGIN
    include newplugin.am
    endif

Now (re)build VPP.

    $ make wipe
    $ make build

Configuration

To enable the sample plugin

    sample macswap <interface name>

To disable the sample plugin

    sample macswap <interface name> disable