vpp-swan: Add plugin for vpp-swan

Added plugin vpp-swan is a plugin that helps offloading
Strongswan IPsec ESP process from Linux Kernel to VPP.

Type: feature
Signed-off-by: Gabriel Oginski <gabrielx.oginski@intel.com>
Change-Id: Iec77945892453fac1890d3c49d7d86fc6b09c893
(cherry picked from commit 4e88e041ad47bf422bbb2a0940f77aba11ea2178)

1 files changed, 103 insertions, 0 deletions

diff --git a/extras/strongswan/vpp_sswan/kernel_vpp_plugin.c b/extras/strongswan/vpp_sswan/kernel_vpp_plugin.c
new file mode 100644
index 00000000000..9791987f5ae
--- /dev/null
+++ b/extras/strongswan/vpp_sswan/kernel_vpp_plugin.c
@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 2022 Intel and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <utils/debug.h>
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+
+#define vl_typedefs
+#define vl_endianfun
+/* Include the (first) vlib-api API definition layer */
+#include <vlibmemory/vl_memory_api_h.h>
+/* Include the current layer (third) vpp API definition layer */
+#include <vpp/api/vpe_types.api.h>
+#include <vpp/api/vpe.api.h>
+#undef vl_typedefs
+#undef vl_endianfun
+
+#include "kernel_vpp_plugin.h"
+#include "kernel_vpp_shared.h"
+#include "kernel_vpp_ipsec.h"
+#include "kernel_vpp_net.h"
+
+typedef struct private_kernel_vpp_plugin_t private_kernel_vpp_plugin_t;
+
+/**
+ * private data of kernel vpp plugin
+ */
+struct private_kernel_vpp_plugin_t
+{
+  /**
+   * implements plugin interface
+   */
+  kernel_vpp_plugin_t public;
+
+  vac_t *vac;
+};
+
+METHOD (plugin_t, get_name, char *, private_kernel_vpp_plugin_t *this)
+{
+  return "kernel-vpp";
+}
+
+METHOD (plugin_t, get_features, int, private_kernel_vpp_plugin_t *this,
+	plugin_feature_t *features[])
+{
+  static plugin_feature_t f[] = {
+    PLUGIN_CALLBACK (kernel_ipsec_register, kernel_vpp_ipsec_create),
+    PLUGIN_PROVIDE (CUSTOM, "kernel-ipsec"),
+    PLUGIN_CALLBACK (kernel_net_register, kernel_vpp_net_create),
+    PLUGIN_PROVIDE (CUSTOM, "kernel-net"),
+  };
+  *features = f;
+  return countof (f);
+}
+
+METHOD (plugin_t, destroy, void, private_kernel_vpp_plugin_t *this)
+{
+  if (this->vac)
+    {
+      lib->set (lib, "kernel-vpp-vac", NULL);
+      this->vac->destroy (this->vac);
+    }
+  free (this);
+}
+
+plugin_t *
+kernel_vpp_plugin_create ()
+{
+  private_kernel_vpp_plugin_t *this;
+
+  INIT(this,
+        .public = {
+            .plugin = {
+                .get_name = _get_name,
+                .get_features = _get_features,
+                .destroy = _destroy,
+            },
+        },
+    );
+
+  this->vac = vac_create ("strongswan");
+  if (!this->vac)
+    {
+      DBG1 (DBG_KNL, "vac_create failed");
+      destroy (this);
+      return NULL;
+    }
+  lib->set (lib, "kernel-vpp-vac", this->vac);
+
+  return &this->public.plugin;
+}