nat: move nat64 to a subfeature

Type: refactor

Change-Id: I3b9e17164647d2019b1f40cffeed63393345219e
Signed-off-by: Filip Varga <fivarga@cisco.com>

1 files changed, 992 insertions, 0 deletions

diff --git a/src/plugins/nat/nat64/nat64_cli.c b/src/plugins/nat/nat64/nat64_cli.c
new file mode 100644
index 00000000000..a7dd9ab9147
--- /dev/null
+++ b/src/plugins/nat/nat64/nat64_cli.c
@@ -0,0 +1,992 @@
+/*
+ * Copyright (c) 2020 Cisco 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 <vnet/fib/fib_table.h>
+#include <nat/nat64/nat64.h>
+
+static clib_error_t *
+nat64_plugin_enable_disable_command_fn (vlib_main_t * vm,
+					unformat_input_t * input,
+					vlib_cli_command_t * cmd)
+{
+  unformat_input_t _line_input, *line_input = &_line_input;
+  u8 enable = 0, is_set = 0;
+  clib_error_t *error = 0;
+  nat64_config_t c = { 0 };
+
+  if (!unformat_user (input, unformat_line_input, line_input))
+    return 0;
+
+  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (!is_set && unformat (line_input, "enable"))
+	{
+	  unformat (line_input, "bib-buckets %u", &c.bib_buckets);
+	  unformat (line_input, "bib-memory %u", &c.bib_memory_size);
+	  unformat (line_input, "st-buckets %u", &c.st_buckets);
+	  unformat (line_input, "st-memory %u", &c.st_memory_size);
+	  enable = 1;
+	}
+      else if (!is_set && unformat (line_input, "disable"));
+      else
+	{
+	  error = clib_error_return (0, "unknown input '%U'",
+				     format_unformat_error, line_input);
+	  goto done;
+	}
+      is_set = 1;
+    }
+
+  if (enable)
+    {
+      if (nat64_plugin_enable (c))
+	error = clib_error_return (0, "plugin enable failed");
+    }
+  else
+    {
+      if (nat64_plugin_disable ())
+	error = clib_error_return (0, "plugin disable failed");
+    }
+done:
+  unformat_free (line_input);
+  return error;
+}
+
+static clib_error_t *
+nat64_add_del_pool_addr_command_fn (vlib_main_t * vm,
+				    unformat_input_t * input,
+				    vlib_cli_command_t * cmd)
+{
+  unformat_input_t _line_input, *line_input = &_line_input;
+  ip4_address_t start_addr, end_addr, this_addr;
+  u32 start_host_order, end_host_order;
+  int i, count, rv;
+  u32 vrf_id = ~0;
+  u8 is_add = 1;
+  clib_error_t *error = 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, "%U - %U",
+		    unformat_ip4_address, &start_addr,
+		    unformat_ip4_address, &end_addr))
+	;
+      else if (unformat (line_input, "tenant-vrf %u", &vrf_id))
+	;
+      else if (unformat (line_input, "%U", unformat_ip4_address, &start_addr))
+	end_addr = start_addr;
+      else if (unformat (line_input, "del"))
+	is_add = 0;
+      else
+	{
+	  error = clib_error_return (0, "unknown input '%U'",
+				     format_unformat_error, line_input);
+	  goto done;
+	}
+    }
+
+  start_host_order = clib_host_to_net_u32 (start_addr.as_u32);
+  end_host_order = clib_host_to_net_u32 (end_addr.as_u32);
+
+  if (end_host_order < start_host_order)
+    {
+      error = clib_error_return (0, "end address less than start address");
+      goto done;
+    }
+
+  count = (end_host_order - start_host_order) + 1;
+  this_addr = start_addr;
+
+  for (i = 0; i < count; i++)
+    {
+      rv = nat64_add_del_pool_addr (0, &this_addr, vrf_id, is_add);
+
+      switch (rv)
+	{
+	case VNET_API_ERROR_NO_SUCH_ENTRY:
+	  error =
+	    clib_error_return (0, "NAT64 pool address %U not exist.",
+			       format_ip4_address, &this_addr);
+	  goto done;
+	case VNET_API_ERROR_VALUE_EXIST:
+	  error =
+	    clib_error_return (0, "NAT64 pool address %U exist.",
+			       format_ip4_address, &this_addr);
+	  goto done;
+	default:
+	  break;
+
+	}
+      increment_v4_address (&this_addr);
+    }
+
+done:
+  unformat_free (line_input);
+
+  return error;
+}
+
+static int
+nat64_cli_pool_walk (nat64_address_t * ap, void *ctx)
+{
+  vlib_main_t *vm = ctx;
+
+  if (ap->fib_index != ~0)
+    {
+      fib_table_t *fib;
+      fib = fib_table_get (ap->fib_index, FIB_PROTOCOL_IP6);
+      if (!fib)
+	return -1;
+      vlib_cli_output (vm, " %U tenant VRF: %u", format_ip4_address,
+		       &ap->addr, fib->ft_table_id);
+    }
+  else
+    vlib_cli_output (vm, " %U", format_ip4_address, &ap->addr);
+
+#define _(N, i, n, s) \
+  vlib_cli_output (vm, "  %d busy %s ports", ap->busy_##n##_ports, s);
+  foreach_nat_protocol
+#undef _
+    return 0;
+}
+
+static clib_error_t *
+nat64_show_pool_command_fn (vlib_main_t * vm,
+			    unformat_input_t * input,
+			    vlib_cli_command_t * cmd)
+{
+  vlib_cli_output (vm, "NAT64 pool:");
+  nat64_pool_addr_walk (nat64_cli_pool_walk, vm);
+
+  return 0;
+}
+
+static clib_error_t *
+nat64_interface_feature_command_fn (vlib_main_t * vm,
+				    unformat_input_t *
+				    input, vlib_cli_command_t * cmd)
+{
+  unformat_input_t _line_input, *line_input = &_line_input;
+  vnet_main_t *vnm = vnet_get_main ();
+  clib_error_t *error = 0;
+  u32 sw_if_index;
+  u32 *inside_sw_if_indices = 0;
+  u32 *outside_sw_if_indices = 0;
+  u8 is_add = 1;
+  int i, rv;
+
+  /* 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, "in %U", unformat_vnet_sw_interface,
+		    vnm, &sw_if_index))
+	vec_add1 (inside_sw_if_indices, sw_if_index);
+      else if (unformat (line_input, "out %U", unformat_vnet_sw_interface,
+			 vnm, &sw_if_index))
+	vec_add1 (outside_sw_if_indices, sw_if_index);
+      else if (unformat (line_input, "del"))
+	is_add = 0;
+      else
+	{
+	  error = clib_error_return (0, "unknown input '%U'",
+				     format_unformat_error, line_input);
+	  goto done;
+	}
+    }
+
+  if (vec_len (inside_sw_if_indices))
+    {
+      for (i = 0; i < vec_len (inside_sw_if_indices); i++)
+	{
+	  sw_if_index = inside_sw_if_indices[i];
+	  rv = nat64_interface_add_del (sw_if_index, 1, is_add);
+	  switch (rv)
+	    {
+	    case VNET_API_ERROR_NO_SUCH_ENTRY:
+	      error =
+		clib_error_return (0, "%U NAT64 feature not enabled.",
+				   format_vnet_sw_if_index_name, vnm,
+				   sw_if_index);
+	      goto done;
+	    case VNET_API_ERROR_VALUE_EXIST:
+	      error =
+		clib_error_return (0, "%U NAT64 feature already enabled.",
+				   format_vnet_sw_if_index_name, vnm,
+				   vnm, sw_if_index);
+	      goto done;
+	    case VNET_API_ERROR_INVALID_VALUE:
+	    case VNET_API_ERROR_INVALID_VALUE_2:
+	      error =
+		clib_error_return (0,
+				   "%U NAT64 feature enable/disable failed.",
+				   format_vnet_sw_if_index_name, vnm,
+				   sw_if_index);
+	      goto done;
+	    default:
+	      break;
+
+	    }
+	}
+    }
+
+  if (vec_len (outside_sw_if_indices))
+    {
+      for (i = 0; i < vec_len (outside_sw_if_indices); i++)
+	{
+	  sw_if_index = outside_sw_if_indices[i];
+	  rv = nat64_interface_add_del (sw_if_index, 0, is_add);
+	  switch (rv)
+	    {
+	    case VNET_API_ERROR_NO_SUCH_ENTRY:
+	      error =
+		clib_error_return (0, "%U NAT64 feature not enabled.",
+				   format_vnet_sw_if_index_name, vnm,
+				   sw_if_index);
+	      goto done;
+	    case VNET_API_ERROR_VALUE_EXIST:
+	      error =
+		clib_error_return (0, "%U NAT64 feature already enabled.",
+				   format_vnet_sw_if_index_name, vnm,
+				   sw_if_index);
+	      goto done;
+	    case VNET_API_ERROR_INVALID_VALUE:
+	    case VNET_API_ERROR_INVALID_VALUE_2:
+	      error =
+		clib_error_return (0,
+				   "%U NAT64 feature enable/disable failed.",
+				   format_vnet_sw_if_index_name, vnm,
+				   sw_if_index);
+	      goto done;
+	    default:
+	      break;
+
+	    }
+	}
+    }
+
+done:
+  unformat_free (line_input);
+  vec_free (inside_sw_if_indices);
+  vec_free (outside_sw_if_indices);
+
+  return error;
+}
+
+static int
+nat64_cli_interface_walk (nat64_interface_t * i, void *ctx)
+{
+  vlib_main_t *vm = ctx;
+  vnet_main_t *vnm = vnet_get_main ();
+
+  vlib_cli_output (vm, " %U %s", format_vnet_sw_if_index_name, vnm,
+		   i->sw_if_index,
+		   (nat64_interface_is_inside (i)
+		    && nat64_interface_is_outside (i)) ? "in out" :
+		   nat64_interface_is_inside (i) ? "in" : "out");
+  return 0;
+}
+
+static clib_error_t *
+nat64_show_interfaces_command_fn (vlib_main_t * vm,
+				  unformat_input_t *
+				  input, vlib_cli_command_t * cmd)
+{
+  vlib_cli_output (vm, "NAT64 interfaces:");
+  nat64_interfaces_walk (nat64_cli_interface_walk, vm);
+
+  return 0;
+}
+
+static clib_error_t *
+nat64_add_del_static_bib_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;
+  u8 is_add = 1;
+  ip6_address_t in_addr;
+  ip4_address_t out_addr;
+  u32 in_port = 0;
+  u32 out_port = 0;
+  u32 vrf_id = 0, protocol;
+  nat_protocol_t proto = 0;
+  u8 p = 0;
+  int rv;
+
+  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, "%U %u", unformat_ip6_address,
+		    &in_addr, &in_port))
+	;
+      else if (unformat (line_input, "%U %u", unformat_ip4_address,
+			 &out_addr, &out_port))
+	;
+      else if (unformat (line_input, "vrf %u", &vrf_id))
+	;
+      else if (unformat (line_input, "%U", unformat_nat_protocol, &proto))
+	;
+      else
+	if (unformat
+	    (line_input, "%U %U %u", unformat_ip6_address, &in_addr,
+	     unformat_ip4_address, &out_addr, &protocol))
+	p = (u8) protocol;
+      else if (unformat (line_input, "del"))
+	is_add = 0;
+      else
+	{
+	  error = clib_error_return (0, "unknown input: '%U'",
+				     format_unformat_error, line_input);
+	  goto done;
+	}
+    }
+
+  if (!p)
+    {
+      if (!in_port)
+	{
+	  error =
+	    clib_error_return (0, "inside port and address  must be set");
+	  goto done;
+	}
+
+      if (!out_port)
+	{
+	  error =
+	    clib_error_return (0, "outside port and address  must be set");
+	  goto done;
+	}
+
+      p = nat_proto_to_ip_proto (proto);
+    }
+
+  rv =
+    nat64_add_del_static_bib_entry (&in_addr, &out_addr, (u16) in_port,
+				    (u16) out_port, p, vrf_id, is_add);
+
+  switch (rv)
+    {
+    case VNET_API_ERROR_NO_SUCH_ENTRY:
+      error = clib_error_return (0, "NAT64 BIB entry not exist.");
+      goto done;
+    case VNET_API_ERROR_VALUE_EXIST:
+      error = clib_error_return (0, "NAT64 BIB entry exist.");
+      goto done;
+    case VNET_API_ERROR_UNSPECIFIED:
+      error = clib_error_return (0, "Crerate NAT64 BIB entry failed.");
+      goto done;
+    case VNET_API_ERROR_INVALID_VALUE:
+      error =
+	clib_error_return (0,
+			   "Outside address %U and port %u already in use.",
+			   format_ip4_address, &out_addr, out_port);
+      goto done;
+    case VNET_API_ERROR_INVALID_VALUE_2:
+      error = clib_error_return (0, "Invalid outside port.");
+    default:
+      break;
+    }
+
+done:
+  unformat_free (line_input);
+
+  return error;
+}
+
+static int
+nat64_cli_bib_walk (nat64_db_bib_entry_t * bibe, void *ctx)
+{
+  vlib_main_t *vm = ctx;
+  fib_table_t *fib;
+
+  fib = fib_table_get (bibe->fib_index, FIB_PROTOCOL_IP6);
+  if (!fib)
+    return -1;
+
+  switch (bibe->proto)
+    {
+    case IP_PROTOCOL_ICMP:
+    case IP_PROTOCOL_TCP:
+    case IP_PROTOCOL_UDP:
+      vlib_cli_output (vm, " %U %u %U %u protocol %U vrf %u %s %u sessions",
+		       format_ip6_address, &bibe->in_addr,
+		       clib_net_to_host_u16 (bibe->in_port),
+		       format_ip4_address, &bibe->out_addr,
+		       clib_net_to_host_u16 (bibe->out_port),
+		       format_nat_protocol,
+		       ip_proto_to_nat_proto (bibe->proto), fib->ft_table_id,
+		       bibe->is_static ? "static" : "dynamic", bibe->ses_num);
+      break;
+    default:
+      vlib_cli_output (vm, " %U %U protocol %u vrf %u %s %u sessions",
+		       format_ip6_address, &bibe->in_addr,
+		       format_ip4_address, &bibe->out_addr,
+		       bibe->proto, fib->ft_table_id,
+		       bibe->is_static ? "static" : "dynamic", bibe->ses_num);
+    }
+  return 0;
+}
+
+static clib_error_t *
+nat64_show_bib_command_fn (vlib_main_t * vm,
+			   unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+  nat64_main_t *nm = &nat64_main;
+  unformat_input_t _line_input, *line_input = &_line_input;
+  clib_error_t *error = 0;
+  u32 proto = NAT_PROTOCOL_OTHER;
+  u8 p = 255;
+  nat64_db_t *db;
+
+  if (!unformat_user (input, unformat_line_input, line_input))
+    return 0;
+
+  if (unformat (line_input, "%U", unformat_nat_protocol, &proto))
+    p = nat_proto_to_ip_proto (proto);
+  else if (unformat (line_input, "unknown"))
+    p = 0;
+  else if (unformat (line_input, "all"))
+    ;
+  else
+    {
+      error = clib_error_return (0, "unknown input: '%U'",
+				 format_unformat_error, line_input);
+      goto done;
+    }
+
+  if (p == 255)
+    vlib_cli_output (vm, "NAT64 BIB entries:");
+  else
+    vlib_cli_output (vm, "NAT64 %U BIB entries:", format_nat_protocol, proto);
+
+  /* *INDENT-OFF* */
+  vec_foreach (db, nm->db)
+    nat64_db_bib_walk (db, p, nat64_cli_bib_walk, vm);
+  /* *INDENT-ON* */
+
+done:
+  unformat_free (line_input);
+
+  return error;
+}
+
+typedef struct nat64_cli_st_walk_ctx_t_
+{
+  vlib_main_t *vm;
+  nat64_db_t *db;
+} nat64_cli_st_walk_ctx_t;
+
+static int
+nat64_cli_st_walk (nat64_db_st_entry_t * ste, void *arg)
+{
+  nat64_cli_st_walk_ctx_t *ctx = arg;
+  vlib_main_t *vm = ctx->vm;
+  nat64_db_bib_entry_t *bibe;
+  fib_table_t *fib;
+
+  bibe = nat64_db_bib_entry_by_index (ctx->db, ste->proto, ste->bibe_index);
+  if (!bibe)
+    return -1;
+
+  fib = fib_table_get (bibe->fib_index, FIB_PROTOCOL_IP6);
+  if (!fib)
+    return -1;
+
+  u32 vrf_id = fib->ft_table_id;
+
+  if (ste->proto == IP_PROTOCOL_ICMP)
+    vlib_cli_output (vm, " %U %U %u %U %U %u protocol %U vrf %u",
+		     format_ip6_address, &bibe->in_addr,
+		     format_ip6_address, &ste->in_r_addr,
+		     clib_net_to_host_u16 (bibe->in_port),
+		     format_ip4_address, &bibe->out_addr,
+		     format_ip4_address, &ste->out_r_addr,
+		     clib_net_to_host_u16 (bibe->out_port),
+		     format_nat_protocol,
+		     ip_proto_to_nat_proto (bibe->proto), vrf_id);
+  else if (ste->proto == IP_PROTOCOL_TCP || ste->proto == IP_PROTOCOL_UDP)
+    vlib_cli_output (vm, " %U %u %U %u %U %u %U %u protcol %U vrf %u",
+		     format_ip6_address, &bibe->in_addr,
+		     clib_net_to_host_u16 (bibe->in_port),
+		     format_ip6_address, &ste->in_r_addr,
+		     clib_net_to_host_u16 (ste->r_port),
+		     format_ip4_address, &bibe->out_addr,
+		     clib_net_to_host_u16 (bibe->out_port),
+		     format_ip4_address, &ste->out_r_addr,
+		     clib_net_to_host_u16 (ste->r_port),
+		     format_nat_protocol,
+		     ip_proto_to_nat_proto (bibe->proto), vrf_id);
+  else
+    vlib_cli_output (vm, " %U %U %U %U protocol %u vrf %u",
+		     format_ip6_address, &bibe->in_addr,
+		     format_ip6_address, &ste->in_r_addr,
+		     format_ip4_address, &bibe->out_addr,
+		     format_ip4_address, &ste->out_r_addr,
+		     bibe->proto, vrf_id);
+
+  return 0;
+}
+
+static clib_error_t *
+nat64_show_st_command_fn (vlib_main_t * vm,
+			  unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+  nat64_main_t *nm = &nat64_main;
+  unformat_input_t _line_input, *line_input = &_line_input;
+  clib_error_t *error = 0;
+  u32 proto = NAT_PROTOCOL_OTHER;
+  u8 p = 255;
+  nat64_db_t *db;
+  nat64_cli_st_walk_ctx_t ctx = {
+    .vm = vm,
+  };
+
+  if (!unformat_user (input, unformat_line_input, line_input))
+    return 0;
+
+  if (unformat (line_input, "%U", unformat_nat_protocol, &proto))
+    p = nat_proto_to_ip_proto (proto);
+  else if (unformat (line_input, "unknown"))
+    p = 0;
+  else if (unformat (line_input, "all"))
+    ;
+  else
+    {
+      error = clib_error_return (0, "unknown input: '%U'",
+				 format_unformat_error, line_input);
+      goto done;
+    }
+
+  if (p == 255)
+    vlib_cli_output (vm, "NAT64 sessions:");
+  else
+    vlib_cli_output (vm, "NAT64 %U sessions:", format_nat_protocol, proto);
+  /* *INDENT-OFF* */
+  vec_foreach (db, nm->db)
+    {
+      ctx.db = db;
+      nat64_db_st_walk (db, p, nat64_cli_st_walk, &ctx);
+    }
+  /* *INDENT-ON* */
+
+done:
+  unformat_free (line_input);
+
+  return error;
+}
+
+static clib_error_t *
+nat64_add_del_prefix_command_fn (vlib_main_t * vm, unformat_input_t * input,
+				 vlib_cli_command_t * cmd)
+{
+  nat64_main_t *nm = &nat64_main;
+  vnet_main_t *vnm = vnet_get_main ();
+  clib_error_t *error = 0;
+  unformat_input_t _line_input, *line_input = &_line_input;
+  u8 is_add = 1;
+  u32 vrf_id = 0, sw_if_index = ~0;
+  ip6_address_t prefix;
+  u32 plen = 0;
+  int rv;
+
+  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, "%U/%u", unformat_ip6_address, &prefix, &plen))
+	;
+      else if (unformat (line_input, "tenant-vrf %u", &vrf_id))
+	;
+      else if (unformat (line_input, "del"))
+	is_add = 0;
+      else
+	if (unformat
+	    (line_input, "interface %U", unformat_vnet_sw_interface, vnm,
+	     &sw_if_index))
+	;
+      else
+	{
+	  error = clib_error_return (0, "unknown input: '%U'",
+				     format_unformat_error, line_input);
+	  goto done;
+	}
+    }
+
+  if (!plen)
+    {
+      error = clib_error_return (0, "NAT64 prefix must be set.");
+      goto done;
+    }
+
+  rv = nat64_add_del_prefix (&prefix, (u8) plen, vrf_id, is_add);
+
+  switch (rv)
+    {
+    case VNET_API_ERROR_NO_SUCH_ENTRY:
+      error = clib_error_return (0, "NAT64 prefix not exist.");
+      goto done;
+    case VNET_API_ERROR_INVALID_VALUE:
+      error = clib_error_return (0, "Invalid prefix length.");
+      goto done;
+    default:
+      break;
+    }
+
+  /*
+   * Add RX interface route, whenNAT isn't running on the real input
+   * interface
+   */
+  if (sw_if_index != ~0)
+    {
+      u32 fib_index;
+      fib_prefix_t fibpfx = {
+	.fp_len = plen,
+	.fp_proto = FIB_PROTOCOL_IP6,
+	.fp_addr = {
+		    .ip6 = prefix}
+      };
+
+      if (is_add)
+	{
+	  fib_index =
+	    fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6,
+					       vrf_id, nm->fib_src_hi);
+	  fib_table_entry_update_one_path (fib_index, &fibpfx,
+					   nm->fib_src_hi,
+					   FIB_ENTRY_FLAG_NONE,
+					   DPO_PROTO_IP6, NULL,
+					   sw_if_index, ~0, 0,
+					   NULL, FIB_ROUTE_PATH_INTF_RX);
+	}
+      else
+	{
+	  fib_index = fib_table_find (FIB_PROTOCOL_IP6, vrf_id);
+	  fib_table_entry_path_remove (fib_index, &fibpfx,
+				       nm->fib_src_hi,
+				       DPO_PROTO_IP6, NULL,
+				       sw_if_index, ~0, 1,
+				       FIB_ROUTE_PATH_INTF_RX);
+	  fib_table_unlock (fib_index, FIB_PROTOCOL_IP6, nm->fib_src_hi);
+	}
+    }
+
+done:
+  unformat_free (line_input);
+
+  return error;
+}
+
+static int
+nat64_cli_prefix_walk (nat64_prefix_t * p, void *ctx)
+{
+  vlib_main_t *vm = ctx;
+
+  vlib_cli_output (vm, " %U/%u tenant-vrf %u",
+		   format_ip6_address, &p->prefix, p->plen, p->vrf_id);
+
+  return 0;
+}
+
+static clib_error_t *
+nat64_show_prefix_command_fn (vlib_main_t * vm,
+			      unformat_input_t * input,
+			      vlib_cli_command_t * cmd)
+{
+  vlib_cli_output (vm, "NAT64 prefix:");
+  nat64_prefix_walk (nat64_cli_prefix_walk, vm);
+
+  return 0;
+}
+
+static clib_error_t *
+nat64_add_interface_address_command_fn (vlib_main_t * vm,
+					unformat_input_t * input,
+					vlib_cli_command_t * cmd)
+{
+  vnet_main_t *vnm = vnet_get_main ();
+  unformat_input_t _line_input, *line_input = &_line_input;
+  u32 sw_if_index;
+  int rv;
+  int is_add = 1;
+  clib_error_t *error = 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, "%U", unformat_vnet_sw_interface, vnm, &sw_if_index));
+      else if (unformat (line_input, "del"))
+	is_add = 0;
+      else
+	{
+	  error = clib_error_return (0, "unknown input '%U'",
+				     format_unformat_error, line_input);
+	  goto done;
+	}
+    }
+
+  rv = nat64_add_interface_address (sw_if_index, is_add);
+
+  switch (rv)
+    {
+    case VNET_API_ERROR_NO_SUCH_ENTRY:
+      error = clib_error_return (0, "entry not exist");
+      break;
+    case VNET_API_ERROR_VALUE_EXIST:
+      error = clib_error_return (0, "entry exist");
+      break;
+    default:
+      break;
+    }
+
+done:
+  unformat_free (line_input);
+
+  return error;
+}
+
+/* *INDENT-OFF* */
+/*?
+ * @cliexpar
+ * @cliexstart{nat64 plugin}
+ * Enable/disable NAT64 plugin.
+ * To enable NAT64 plugin use:
+ *  vpp# nat64 plugin enable
+ * To enable NAT64 plugin and configure buckets/memory:
+ *  vpp# nat64 plugin enable bib-buckets <n> bib-memory <s> \
+ *    st-buckets <n> st-memory <s>
+ * To disable NAT64 plugin:
+ *  vpp# nat64 plugin disable
+ * @cliexend
+?*/
+VLIB_CLI_COMMAND (nat64_plugin_enable_disable_command, static) =
+{
+  .path = "nat64 plugin",
+  .short_help = "nat64 plugin <enable "
+                "[bib-buckets <count>] [bib-memory <size>] "
+                "[st-buckets <count>] [st-memory <size>] | disable>",
+  .function = nat64_plugin_enable_disable_command_fn,
+};
+
+/*?
+ * @cliexpar
+ * @cliexstart{nat64 add pool address}
+ * Add/delete NAT64 pool address.
+ * To add single NAT64 pool address use:
+ *  vpp# nat64 add pool address 10.1.1.10
+ * To add NAT64 pool address range use:
+ *  vpp# nat64 add pool address 10.1.1.2 - 10.1.1.5
+ * To add NAT64 pool address for specific tenant use:
+ *  vpp# nat64 add pool address 10.1.1.100 tenant-vrf 100
+ * @cliexend
+?*/
+VLIB_CLI_COMMAND (nat64_add_pool_address_command, static) = {
+  .path = "nat64 add pool address",
+  .short_help = "nat64 add pool address <ip4-range-start> [- <ip4-range-end>] "
+                "[tenant-vrf <vrf-id>] [del]",
+  .function = nat64_add_del_pool_addr_command_fn,
+};
+
+/*?
+ * @cliexpar
+ * @cliexstart{show nat64 pool}
+ * Show NAT64 pool.
+ *  vpp# show nat64 pool
+ *  NAT64 pool:
+ *   10.1.1.3 tenant VRF: 0
+ *   10.1.1.10 tenant VRF: 10
+ * @cliexend
+?*/
+VLIB_CLI_COMMAND (show_nat64_pool_command, static) = {
+  .path = "show nat64 pool",
+  .short_help = "show nat64 pool",
+  .function = nat64_show_pool_command_fn,
+};
+
+/*?
+ * @cliexpar
+ * @cliexstart{set interface nat64}
+ * Enable/disable NAT64 feature on the interface.
+ * To enable NAT64 feature with local (IPv6) network interface
+ * GigabitEthernet0/8/0 and external (IPv4) network interface
+ * GigabitEthernet0/a/0 use:
+ *  vpp# set interface nat64 in GigabitEthernet0/8/0 out GigabitEthernet0/a/0
+ * @cliexend
+?*/
+VLIB_CLI_COMMAND (set_interface_nat64_command, static) = {
+  .path = "set interface nat64",
+  .short_help = "set interface nat64 in|out <intfc> [del]",
+  .function = nat64_interface_feature_command_fn,
+};
+
+/*?
+ * @cliexpar
+ * @cliexstart{show nat64 interfaces}
+ * Show interfaces with NAT64 feature.
+ * To show interfaces with NAT64 feature use:
+ *  vpp# show nat64 interfaces
+ *  NAT64 interfaces:
+ *   GigabitEthernet0/8/0 in
+ *   GigabitEthernet0/a/0 out
+ * @cliexend
+?*/
+VLIB_CLI_COMMAND (show_nat64_interfaces_command, static) = {
+  .path = "show nat64 interfaces",
+  .short_help = "show nat64 interfaces",
+  .function = nat64_show_interfaces_command_fn,
+};
+
+/*?
+ * @cliexpar
+ * @cliexstart{nat64 add static bib}
+ * Add/delete NAT64 static BIB entry.
+ * To create NAT64 satatic BIB entry use:
+ *  vpp# nat64 add static bib 2001:db8:c000:221:: 1234 10.1.1.3 5678 tcp
+ *  vpp# nat64 add static bib 2001:db8:c000:221:: 1234 10.1.1.3 5678 udp vrf 10
+ * @cliexend
+?*/
+VLIB_CLI_COMMAND (nat64_add_del_static_bib_command, static) = {
+  .path = "nat64 add static bib",
+  .short_help = "nat64 add static bib <ip6-addr> <port> <ip4-addr> <port> "
+                "tcp|udp|icmp [vfr <table-id>] [del]",
+  .function = nat64_add_del_static_bib_command_fn,
+};
+
+/*?
+ * @cliexpar
+ * @cliexstart{show nat64 bib}
+ * Show NAT64 BIB entries.
+ * To show NAT64 TCP BIB entries use:
+ *  vpp# show nat64 bib tcp
+ *  NAT64 tcp BIB:
+ *   fd01:1::2 6303 10.0.0.3 62303 tcp vrf 0 dynamic 1 sessions
+ *   2001:db8:c000:221:: 1234 10.1.1.3 5678 tcp vrf 0 static 2 sessions
+ * To show NAT64 UDP BIB entries use:
+ *  vpp# show nat64 bib udp
+ *  NAT64 udp BIB:
+ *   fd01:1::2 6304 10.0.0.3 10546 udp vrf 0 dynamic 10 sessions
+ *   2001:db8:c000:221:: 1234 10.1.1.3 5678 udp vrf 10 static 0 sessions
+ * To show NAT64 ICMP BIB entries use:
+ *  vpp# show nat64 bib icmp
+ *  NAT64 icmp BIB:
+ *   fd01:1::2 6305 10.0.0.3 63209 icmp vrf 10 dynamic 1 sessions
+ * @cliexend
+?*/
+VLIB_CLI_COMMAND (show_nat64_bib_command, static) = {
+  .path = "show nat64 bib",
+  .short_help = "show nat64 bib all|tcp|udp|icmp|unknown",
+  .function = nat64_show_bib_command_fn,
+};
+
+/*?
+ * @cliexpar
+ * @cliexstart{show nat64 session table}
+ * Show NAT64 session table.
+ * To show NAT64 TCP session table use:
+ *  vpp# show nat64 session table tcp
+ *  NAT64 tcp session table:
+ *   fd01:1::2 6303 64:ff9b::ac10:202 20 10.0.0.3 62303 172.16.2.2 20 tcp vrf 0
+ *   fd01:3::2 6303 64:ff9b::ac10:202 20 10.0.10.3 21300 172.16.2.2 20 tcp vrf 10
+ * To show NAT64 UDP session table use:
+ * #vpp show nat64 session table udp
+ * NAT64 udp session table:
+ *  fd01:1::2 6304 64:ff9b::ac10:202 20 10.0.0.3 10546 172.16.2.2 20 udp vrf 0
+ *  fd01:3::2 6304 64:ff9b::ac10:202 20 10.0.10.3 58627 172.16.2.2 20 udp vrf 10
+ *  fd01:1::2 1235 64:ff9b::a00:3 4023 10.0.0.3 24488 10.0.0.3 4023 udp vrf 0
+ *  fd01:1::3 23 64:ff9b::a00:3 24488 10.0.0.3 4023 10.0.0.3 24488 udp vrf 0
+ * To show NAT64 ICMP session table use:
+ * #vpp show nat64 session table icmp
+ * NAT64 icmp session table:
+ *  fd01:1::2 64:ff9b::ac10:202 6305 10.0.0.3 172.16.2.2 63209 icmp vrf 0
+ * @cliexend
+?*/
+VLIB_CLI_COMMAND (show_nat64_st_command, static) = {
+  .path = "show nat64 session table",
+  .short_help = "show nat64 session table all|tcp|udp|icmp|unknown",
+  .function = nat64_show_st_command_fn,
+};
+
+/*?
+ * @cliexpar
+ * @cliexstart{nat64 add prefix}
+ * Set NAT64 prefix for generating IPv6 representations of IPv4 addresses.
+ * To set NAT64 global prefix use:
+ *  vpp# nat64 add prefix 2001:db8::/32
+ * To set NAT64 prefix for specific tenant use:
+ *  vpp# nat64 add prefix 2001:db8:122:300::/56 tenant-vrf 10
+ * @cliexend
+?*/
+VLIB_CLI_COMMAND (nat64_add_del_prefix_command, static) = {
+  .path = "nat64 add prefix",
+  .short_help = "nat64 add prefix <ip6-prefix>/<plen> [tenant-vrf <vrf-id>] "
+                "[del] [interface <interface]",
+  .function = nat64_add_del_prefix_command_fn,
+};
+
+/*?
+ * @cliexpar
+ * @cliexstart{show nat64 prefix}
+ * Show NAT64 prefix.
+ * To show NAT64 prefix use:
+ *  vpp# show nat64 prefix
+ *  NAT64 prefix:
+ *   2001:db8::/32 tenant-vrf 0
+ *   2001:db8:122:300::/56 tenant-vrf 10
+ * @cliexend
+?*/
+VLIB_CLI_COMMAND (show_nat64_prefix_command, static) = {
+  .path = "show nat64 prefix",
+  .short_help = "show nat64 prefix",
+  .function = nat64_show_prefix_command_fn,
+};
+
+/*?
+ * @cliexpar
+ * @cliexstart{nat64 add interface address}
+ * Add/delete NAT64 pool address from specific (DHCP addressed) interface.
+ * To add NAT64 pool address from specific interface use:
+ *  vpp# nat64 add interface address GigabitEthernet0/8/0
+ * @cliexend
+?*/
+VLIB_CLI_COMMAND (nat64_add_interface_address_command, static) = {
+    .path = "nat64 add interface address",
+    .short_help = "nat64 add interface address <interface> [del]",
+    .function = nat64_add_interface_address_command_fn,
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */