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, 88 insertions, 0 deletions

diff --git a/src/plugins/npt66/npt66_cli.c b/src/plugins/npt66/npt66_cli.c
new file mode 100644
index 00000000000..268bca264b3
--- /dev/null
+++ b/src/plugins/npt66/npt66_cli.c
@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: Apache-2.0
+// Copyright(c) 2023 Cisco Systems, Inc.
+
+#include <stdbool.h>
+#include <vlib/vlib.h>
+#include <vnet/feature/feature.h>
+#include <vnet/ip/ip.h>
+#include <vppinfra/clib_error.h>
+#include "npt66.h"
+
+static clib_error_t *
+set_npt66_binding_command_fn (vlib_main_t *vm, unformat_input_t *input,
+			      vlib_cli_command_t *cmd)
+{
+  unformat_input_t _line_input, *line_input = &_line_input;
+  clib_error_t *error = 0;
+  bool internal_set = false, external_set = false;
+  bool add = true;
+  u32 sw_if_index = ~0;
+  ip6_address_t internal, external;
+  int internal_plen = 0, external_plen = 0;
+
+  /* Get a line of input. */
+  if (!unformat_user (input, unformat_line_input, line_input))
+    return 0;
+
+  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (line_input, "internal %U/%d", unformat_ip6_address,
+		    &internal, &internal_plen))
+	internal_set = true;
+      else if (unformat (line_input, "external %U/%d", unformat_ip6_address,
+			 &external, &external_plen))
+	external_set = true;
+      else if (unformat (line_input, "interface %U",
+			 unformat_vnet_sw_interface, vnet_get_main (),
+			 &sw_if_index))
+	;
+      else if (unformat (line_input, "del"))
+	{
+	  add = false;
+	}
+      else
+	{
+	  error = clib_error_return (0, "unknown input `%U'",
+				     format_unformat_error, line_input);
+	  goto done;
+	}
+    }
+  if (sw_if_index == ~0)
+    {
+      error = clib_error_return (0, "interface is required `%U'",
+				 format_unformat_error, line_input);
+      goto done;
+    }
+  if (!internal_set)
+    {
+      error = clib_error_return (0, "missing parameter: internal `%U'",
+				 format_unformat_error, line_input);
+      goto done;
+    }
+  if (!external_set)
+    {
+      error = clib_error_return (0, "missing parameter: external `%U'",
+				 format_unformat_error, line_input);
+      goto done;
+    }
+
+  int rv = npt66_binding_add_del (sw_if_index, &internal, internal_plen,
+				  &external, external_plen, add);
+  if (rv)
+    {
+      error = clib_error_return (0, "Adding binding failed %d", rv);
+      goto done;
+    }
+
+done:
+  unformat_free (line_input);
+
+  return error;
+}
+
+VLIB_CLI_COMMAND (set_npt66_binding_command, static) = {
+  .path = "set npt66 binding",
+  .short_help = "set npt66 binding interface <name> internal <pfx> "
+		"external <pfx> [del]",
+  .function = set_npt66_binding_command_fn,
+};