npt66: network prefix translation for ipv6

This is the initial commit of a NPTv6 (RFC6296) implementation for VPP.
It's restricted to a single internal to external binding and runs
as an output/input feature on the egress interface.

Type: feature
Change-Id: I0e3497af97f1ebd99377b84dbf599ecea935ca24
Signed-off-by: Ole Troan <otroan@employees.org>

1 files changed, 71 insertions, 0 deletions

diff --git a/src/plugins/npt66/npt66_api.c b/src/plugins/npt66/npt66_api.c
new file mode 100644
index 00000000000..91eb73c1e45
--- /dev/null
+++ b/src/plugins/npt66/npt66_api.c
@@ -0,0 +1,71 @@
+// SPDX-License-Identifier: Apache-2.0
+// Copyright(c) 2023 Cisco Systems, Inc.
+
+#include <stdbool.h>
+#include <npt66/npt66.h>
+#include <vnet/vnet.h>
+#include <npt66/npt66.api_enum.h>
+#include <npt66/npt66.api_types.h>
+#include <vlibmemory/api.h>
+#include <vnet/ip/ip.h>
+#include <vnet/ip/ip_types_api.h>
+#include <vpp/app/version.h>
+
+npt66_main_t npt66_main;
+
+/*
+ * This file contains the API handlers for the pnat.api
+ */
+
+#define REPLY_MSG_ID_BASE npt66_main.msg_id_base
+#include <vlibapi/api_helper_macros.h>
+
+static void
+vl_api_npt66_binding_add_del_t_handler (vl_api_npt66_binding_add_del_t *mp)
+{
+  vl_api_npt66_binding_add_del_reply_t *rmp;
+  int rv;
+  clib_warning ("Interface index: %d", mp->sw_if_index);
+  VALIDATE_SW_IF_INDEX_END (mp);
+
+  rv = npt66_binding_add_del (
+    mp->sw_if_index, (ip6_address_t *) &mp->internal.address, mp->internal.len,
+    (ip6_address_t *) &mp->external.address, mp->external.len, mp->is_add);
+
+bad_sw_if_index:
+  REPLY_MACRO_END (VL_API_NPT66_BINDING_ADD_DEL_REPLY);
+}
+
+/* API definitions */
+#include <vnet/format_fns.h>
+#include <npt66/npt66.api.c>
+
+/* Set up the API message handling tables */
+clib_error_t *
+npt66_plugin_api_hookup (vlib_main_t *vm)
+{
+  npt66_main_t *nm = &npt66_main;
+
+  nm->msg_id_base = setup_message_id_table ();
+  return 0;
+}
+
+/*
+ * Register the plugin and hook up the API
+ */
+#include <vnet/plugin/plugin.h>
+VLIB_PLUGIN_REGISTER () = {
+  .version = VPP_BUILD_VER,
+  .description = "NPTv6",
+};
+
+clib_error_t *
+npt66_init (vlib_main_t *vm)
+{
+  npt66_main_t *nm = &npt66_main;
+  memset (nm, 0, sizeof (*nm));
+
+  return npt66_plugin_api_hookup (vm);
+}
+
+VLIB_INIT_FUNCTION (npt66_init);