IPIP: Add IP{v4,v6} over IP{v4,v6} configured tunnel support.

Change-Id: I166301c9e2388bae5f70ec0179d663a2703e27f5
Signed-off-by: Ole Troan <ot@cisco.com>

8 files changed, 0 insertions, 1182 deletions

diff --git a/src/plugins/Makefile.am b/src/plugins/Makefile.am
index f8b1139cb4f..8b46986c9b8 100644
--- a/src/plugins/Makefile.am
+++ b/src/plugins/Makefile.am
@@ -83,10 +83,6 @@ if ENABLE_PPPOE_PLUGIN
 include pppoe.am
 endif
 
-if ENABLE_SIXRD_PLUGIN
-include sixrd.am
-endif
-
 if ENABLE_SRV6AD_PLUGIN
 include srv6_ad.am
 endif
diff --git a/src/plugins/sixrd.am b/src/plugins/sixrd.am
deleted file mode 100644
index 77a4b2187eb..00000000000
--- a/src/plugins/sixrd.am
+++ /dev/null
@@ -1,27 +0,0 @@
-# Copyright (c) 2015 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.
-
-libsixrd_plugin_la_SOURCES =			\
-	sixrd/sixrd.c				\
-	sixrd/ip4_sixrd.c
-
-noinst_HEADERS +=				\
-	sixrd/sixrd.h                           \
-	sixrd/sixrd_all_api_h.h \
-	sixrd/sixrd_msg_enum.h
-
-vppplugins_LTLIBRARIES += libsixrd_plugin.la
-
-API_FILES += sixrd/sixrd.api
-
-# vi:syntax=automake
diff --git a/src/plugins/sixrd/ip4_sixrd.c b/src/plugins/sixrd/ip4_sixrd.c
deleted file mode 100644
index f700f14978c..00000000000
--- a/src/plugins/sixrd/ip4_sixrd.c
+++ /dev/null
@@ -1,165 +0,0 @@
-/*---------------------------------------------------------------------------
- * Copyright (c) 2009-2014 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 "sixrd.h"
-
-vlib_node_registration_t ip4_sixrd_node;
-
-typedef enum {
-  IP4_SIXRD_NEXT_IP6_LOOKUP,
-  IP4_SIXRD_NEXT_DROP,
-  IP4_SIXRD_N_NEXT,
-} ip4_sixrd_next_t;
-
-typedef struct {
-  u32 tunnel_id;
-  u32 length;
-  ip4_address_t src;
-  ip4_address_t dst;
-} sixrd_rx_trace_t;
-
-u8 *
-format_sixrd_rx_trace (u8 * s, va_list * args)
-{
-  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
-  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
-  sixrd_rx_trace_t *t = va_arg (*args, sixrd_rx_trace_t *);
-
-  s = format (s, "6RD: tunnel %d len %d src %U dst %U",
-	      t->tunnel_id, clib_net_to_host_u16 (t->length),
-	      format_ip4_address, &t->src, format_ip4_address, &t->dst);
-  return s;
-}
-
-/*
- * ip4_sixrd_sec_check
- */
-static_always_inline void
-ip4_sixrd_sec_check(sixrd_tunnel_t *t, ip4_address_t sa4,
-		    ip6_address_t sa6, u8 *error) {
-  if (PREDICT_FALSE(sixrd_get_addr_net(t, sa6.as_u64[0]) != sa4.as_u32))
-    *error = SIXRD_ERROR_SEC_CHECK;
-}
-
-/*
- * ip4_sixrd
- */
-uword ip4_sixrd(vlib_main_t *vm, vlib_node_runtime_t *node,
-		vlib_frame_t *frame) {
-  u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
-  vlib_node_runtime_t *error_node = vlib_node_get_runtime(vm, ip4_sixrd_node.index);
-  vnet_interface_main_t * im = &vnet_get_main()->interface_main;
-  u32 thread_index = vlib_get_thread_index ();
-
-  from = vlib_frame_vector_args(frame);
-  n_left_from = frame->n_vectors;
-  next_index = node->cached_next_index;
-  while (n_left_from > 0) {
-    vlib_get_next_frame(vm, node, next_index, to_next, n_left_to_next);
-
-    /* Single loop */
-    while (n_left_from > 0 && n_left_to_next > 0) {
-      u32 pi0;
-      vlib_buffer_t *p0;
-      u8 error0 = SIXRD_ERROR_NONE;
-      sixrd_tunnel_t *t0 = 0;
-      ip4_header_t *ip40;
-      ip6_header_t *ip60;
-      u32 tunnel_sw_if_index = ~0;
-      u32 next0 = IP4_SIXRD_NEXT_DROP;
-
-      pi0 = to_next[0] = from[0];
-      from += 1;
-      n_left_from -= 1;
-      to_next += 1;
-      n_left_to_next -= 1;
-
-      p0 = vlib_get_buffer(vm, pi0);
-      ip40 = vlib_buffer_get_current(p0);
-
-      /* Throw away anything that isn't IP in IP. */
-      if (PREDICT_TRUE(ip40->protocol == IP_PROTOCOL_IPV6 && clib_net_to_host_u16(ip40->length) >= 60)) {
-        vlib_buffer_advance(p0, sizeof(ip4_header_t));
-        t0 = ip4_sixrd_get_tunnel(vnet_buffer(p0)->ip.adj_index[VLIB_TX], (ip4_address_t *)&ip40->dst_address, &error0);
-      } else {
-        error0 = SIXRD_ERROR_BAD_PROTOCOL;
-      }
-
-      if (!t0) {
-	error0 = SIXRD_ERROR_NO_TUNNEL;
-	goto error;
-      }
-
-      tunnel_sw_if_index = t0->sw_if_index;
-
-      /* SIXRD inbound security check */
-      if (t0->security_check) {
-	ip60 = vlib_buffer_get_current(p0);
-        ip4_sixrd_sec_check(t0, ip40->src_address, ip60->src_address, &error0);
-      }
-      next0 = error0 == SIXRD_ERROR_NONE ? IP4_SIXRD_NEXT_IP6_LOOKUP
-                                         : IP4_SIXRD_NEXT_DROP;
-
-      if (PREDICT_FALSE(p0->flags & VLIB_BUFFER_IS_TRACED)) {
-        sixrd_rx_trace_t *tr = vlib_add_trace(vm, node, p0, sizeof(*tr));
-        tr->tunnel_id = tunnel_sw_if_index;
-	tr->length = ip40->length;
-	tr->src.as_u32 = ip40->src_address.as_u32;
-	tr->dst.as_u32 = ip40->dst_address.as_u32;
-      }
-
-      error:
-      if (PREDICT_TRUE(error0 == SIXRD_ERROR_NONE)) {
-	u32 len = vlib_buffer_length_in_chain (vm, p0);
-	vlib_increment_combined_counter (im->combined_sw_if_counters
-					 + VNET_INTERFACE_COUNTER_RX,
-					 thread_index,
-					 tunnel_sw_if_index,
-					 1 /* packets */ ,
-					 len /* bytes */ );
-
-	vnet_buffer (p0)->sw_if_index[VLIB_RX] = tunnel_sw_if_index;
-      } else {
-	p0->error = error_node->errors[error0];
-      }
-      vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next,
-                                      n_left_to_next, pi0, next0);
-    }
-    vlib_put_next_frame(vm, node, next_index, n_left_to_next);
-  }
-  return frame->n_vectors;
-}
-
-static char *sixrd_error_strings[] = {
-#define _(sym, string) string,
-    foreach_sixrd_error
-#undef _
-};
-
-VLIB_REGISTER_NODE(ip4_sixrd_node) = {
-  .function = ip4_sixrd,
-  .name = "ip4-sixrd",
-  .vector_size = sizeof(u32),
-  .format_trace = format_sixrd_rx_trace,
-  .n_errors = SIXRD_N_ERROR,
-  .error_strings = sixrd_error_strings,
-  .n_next_nodes = IP4_SIXRD_N_NEXT,
-  .next_nodes =
-  {
-    [IP4_SIXRD_NEXT_IP6_LOOKUP] = "ip6-lookup",
-    [IP4_SIXRD_NEXT_DROP] = "error-drop",
-  },
-};
diff --git a/src/plugins/sixrd/sixrd.api b/src/plugins/sixrd/sixrd.api
deleted file mode 100644
index 7057bbb1b16..00000000000
--- a/src/plugins/sixrd/sixrd.api
+++ /dev/null
@@ -1,44 +0,0 @@
-/*
- * Copyright (c) 2018 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.
- */
-
-option version = "2.0.0";
-
-define sixrd_add_tunnel
-{
-  u32 client_index;
-  u32 context;
-  u32 fib_index;
-  u8 ip6_prefix[16];
-  u8 ip4_prefix[4];
-  u8 ip4_src[4];
-  u8 ip6_prefix_len;
-  u8 ip4_prefix_len;
-  u16 mtu;
-  u8 security_check;
-};
-
-define sixrd_add_tunnel_reply
-{
-  u32 context;
-  u32 sw_if_index;
-  i32 retval;
-};
-
-autoreply define sixrd_del_tunnel
-{
-  u32 client_index;
-  u32 context;
-  u32 sw_if_index;
-};
diff --git a/src/plugins/sixrd/sixrd.c b/src/plugins/sixrd/sixrd.c
deleted file mode 100644
index 66ad19b7811..00000000000
--- a/src/plugins/sixrd/sixrd.c
+++ /dev/null
@@ -1,775 +0,0 @@
-/*
- * Copyright (c) 2018 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.
- */
-/**
- * This code supports the following sixrd modes:
- *
- * 32 EA bits (Complete IPv4 address is embedded):
- *   ea_bits_len = 32
- * IPv4 suffix is embedded:
- *   ea_bits_len = < 32
- * No embedded address bits (1:1 mode):
- *   ea_bits_len = 0
- */
-
-#include "sixrd.h"
-#include <vnet/plugin/plugin.h>
-#include <vlibapi/api.h>
-#include <vlibmemory/api.h>
-#include <vnet/adj/adj.h>
-#include <vnet/fib/fib_table.h>
-#include <vnet/fib/ip6_fib.h>
-#include <vnet/adj/adj_midchain.h>
-#include <vnet/adj/adj_delegate.h>
-#include <vnet/dpo/lookup_dpo.h>
-#include <vpp/app/version.h>	// Really needed?
-
-/* define message IDs */
-#include "sixrd_msg_enum.h"
-
-/* define message structures */
-#define vl_typedefs
-#include "sixrd_all_api_h.h"
-#undef vl_typedefs
-
-/* define generated endian-swappers */
-#define vl_endianfun
-#include "sixrd_all_api_h.h"
-#undef vl_endianfun
-
-/* instantiate all the print functions we know about */
-#define vl_print(handle, ...) vlib_cli_output(handle, __VA_ARGS__)
-#define vl_printfun
-#include "sixrd_all_api_h.h"
-#undef vl_printfun
-
-/* Get the API version number */
-#define vl_api_version(n, v) static u32 api_version = (v);
-#include "sixrd_all_api_h.h"
-#undef vl_api_version
-
-#define REPLY_MSG_ID_BASE sm->msg_id_base
-#include <vlibapi/api_helper_macros.h>
-
-extern vlib_node_registration_t ip4_sixrd_node;
-
-/**
- * Adj delegate data
- */
-typedef struct sixrd_adj_delegate_t_
-{
-    /**
-     * linkage to the adj
-     */
-  u32 adj_index;
-
-    /**
-     * Linnkage to the FIB node graph
-     */
-  fib_node_t sixrd_node;
-
-    /**
-     * tracking of the IPv4 next-hop
-     */
-  fib_node_index_t sixrd_fib_entry_index;
-
-    /**
-     * sibling on the fib-entry
-     */
-  u32 sixrd_sibling;
-} sixrd_adj_delegate_t;
-
-/**
- * Pool of delegate structs
- */
-static sixrd_adj_delegate_t *sixrd_adj_delegate_pool;
-
-/**
- * Adj delegate registered type
- */
-static adj_delegate_type_t sixrd_adj_delegate_type;
-
-/**
- * FIB node registered type
- */
-static fib_node_type_t sixrd_fib_node_type;
-
-static inline sixrd_adj_delegate_t *
-sixrd_adj_from_base (adj_delegate_t * ad)
-{
-  if (NULL == ad)
-    {
-      return (NULL);
-    }
-  return (pool_elt_at_index (sixrd_adj_delegate_pool, ad->ad_index));
-}
-
-static inline const sixrd_adj_delegate_t *
-sixrd_adj_from_const_base (const adj_delegate_t * ad)
-{
-  if (NULL == ad)
-    {
-      return (NULL);
-    }
-  return (pool_elt_at_index (sixrd_adj_delegate_pool, ad->ad_index));
-}
-
-sixrd_main_t sixrd_main;
-
-static void
-sixrd_fixup (vlib_main_t * vm,
-	     ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data)
-{
-  ip4_header_t *ip4 = vlib_buffer_get_current (b0);
-  ip6_header_t *ip6 = vlib_buffer_get_current (b0) + sizeof (ip4_header_t);
-  const sixrd_tunnel_t *t = data;
-
-  ip4->length = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
-  ip4->dst_address.as_u32 =
-    sixrd_get_addr_net (t, ip6->dst_address.as_u64[0]);
-  ip4->checksum = ip4_header_checksum (ip4);
-}
-
-static void
-ip6ip_fixup (vlib_main_t * vm,
-	     ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data)
-{
-  const sixrd_tunnel_t *t = data;
-  ip4_header_t *ip4 = vlib_buffer_get_current (b0);
-  ip4->length = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
-  ip4->dst_address.as_u32 =
-    sixrd_get_addr_net (t, adj->sub_type.nbr.next_hop.as_u64[0]);
-  ip4->checksum = ip4_header_checksum (ip4);
-}
-
-static sixrd_tunnel_t *
-find_tunnel_by_sw_if_index (u32 sw_if_index)
-{
-  sixrd_main_t *sm = &sixrd_main;
-  u32 ti = sm->tunnel_index_by_sw_if_index[sw_if_index];
-  if (ti == ~0)
-    {
-      clib_warning ("Not our tunnel\n");
-      return (0);
-    }
-  return pool_elt_at_index (sm->tunnels, ti);
-}
-
-static sixrd_tunnel_t *
-find_tunnel (ip6_address_t * ip6_prefix)
-{
-  sixrd_main_t *sm = &sixrd_main;
-  sixrd_tunnel_t *d;
-
-  /* *INDENT-OFF* */
-  pool_foreach (d, sm->tunnels,
-  ({
-    if (!memcmp (&d->ip6_prefix, ip6_prefix, 16))
-      return d;
-  }));
-  /* *INDENT-ON* */
-  return 0;
-}
-
-
-static u8 *
-sixrd_build_rewrite (vnet_main_t * vnm,
-		     u32 sw_if_index,
-		     vnet_link_t link_type, const void *dst_address)
-{
-  u8 *rewrite = NULL;
-  sixrd_tunnel_t *t;
-
-  t = find_tunnel_by_sw_if_index (sw_if_index);
-  if (!t)
-    {
-      return 0;
-    }
-
-  vec_validate (rewrite, sizeof (ip4_header_t) - 1);
-  ip4_header_t *ip4 = (ip4_header_t *) rewrite;
-  ip4->ip_version_and_header_length = 0x45;
-  ip4->ttl = 64;
-  ip4->protocol = IP_PROTOCOL_IPV6;
-  /* fixup ip4 header length and checksum after-the-fact */
-  ip4->src_address.as_u32 = t->ip4_src.as_u32;
-  ip4->dst_address.as_u32 = 0;
-  ip4->checksum = ip4_header_checksum (ip4);
-
-  return rewrite;
-}
-
-static void
-ip6ip_tunnel_stack (adj_index_t ai, u32 fib_entry_index)
-{
-  sixrd_main_t *sm = &sixrd_main;
-  ip_adjacency_t *adj = adj_get (ai);
-  sixrd_tunnel_t *t;
-  u32 sw_if_index = adj->rewrite_header.sw_if_index;
-
-  if ((vec_len (sm->tunnel_index_by_sw_if_index) < sw_if_index) ||
-      (~0 == sm->tunnel_index_by_sw_if_index[sw_if_index]))
-    return;
-
-  t =
-    pool_elt_at_index (sm->tunnels,
-		       sm->tunnel_index_by_sw_if_index[sw_if_index]);
-
-  /*
-   * find the adjacency that is contributed by the FIB entry
-   * that this tunnel resolves via, and use it as the next adj
-   * in the midchain
-   */
-  if (vnet_hw_interface_get_flags (vnet_get_main (), t->hw_if_index) &
-      VNET_HW_INTERFACE_FLAG_LINK_UP)
-    {
-      adj_nbr_midchain_stack (ai,
-			      fib_entry_contribute_ip_forwarding
-			      (fib_entry_index));
-    }
-  else
-    {
-      adj_nbr_midchain_unstack (ai);
-    }
-}
-
-static void
-sixrd_tunnel_stack (adj_index_t ai, u32 fib_index)
-{
-  dpo_id_t dpo = DPO_INVALID;
-  sixrd_main_t *sm = &sixrd_main;
-  ip_adjacency_t *adj = adj_get (ai);
-  u32 sw_if_index = adj->rewrite_header.sw_if_index;
-
-  if ((vec_len (sm->tunnel_index_by_sw_if_index) < sw_if_index) ||
-      (~0 == sm->tunnel_index_by_sw_if_index[sw_if_index]))
-    return;
-
-  if ((vec_len (sm->tunnel_index_by_sw_if_index) < sw_if_index) ||
-      (sm->tunnel_index_by_sw_if_index[sw_if_index] == ~0))
-    return;
-
-  lookup_dpo_add_or_lock_w_fib_index (fib_index, DPO_PROTO_IP4,
-				      LOOKUP_UNICAST, LOOKUP_INPUT_DST_ADDR,
-				      LOOKUP_TABLE_FROM_CONFIG, &dpo);
-  adj_nbr_midchain_stack (ai, &dpo);
-}
-
-const static ip46_address_t sixrd_special_nh = {
-  .ip6 = {
-	  .as_u64 = {
-		     [0] = 0xffffffffffffffff,
-		     [1] = 0xffffffffffffffff,
-		     },
-	  },
-};
-
-static void
-sixrd_update_adj (vnet_main_t * vnm, u32 sw_if_index, adj_index_t ai)
-{
-  ip_adjacency_t *adj = adj_get (ai);
-  sixrd_tunnel_t *t = find_tunnel_by_sw_if_index (sw_if_index);
-
-  if (!memcmp (&sixrd_special_nh,
-	       &adj->sub_type.nbr.next_hop, sizeof (sixrd_special_nh)))
-    {
-      adj_nbr_midchain_update_rewrite (ai, sixrd_fixup, t, ADJ_FLAG_NONE,
-				       sixrd_build_rewrite (vnm, sw_if_index,
-							    adj_get_link_type
-							    (ai), NULL));
-      sixrd_tunnel_stack (ai, t->fib_index);
-    }
-  else
-    {
-      sixrd_adj_delegate_t *sixrd_ad;
-      ip4_address_t da4;
-
-      da4.as_u32 =
-	sixrd_get_addr_net (t, adj->sub_type.nbr.next_hop.as_u64[0]);
-
-      fib_prefix_t pfx = {
-	.fp_proto = FIB_PROTOCOL_IP4,
-	.fp_len = 32,
-	.fp_addr = {.ip4 = da4,}
-	,
-      };
-
-      adj_nbr_midchain_update_rewrite
-	(ai, ip6ip_fixup, t,
-	 ADJ_FLAG_NONE,
-	 sixrd_build_rewrite (vnm, sw_if_index,
-			      adj_get_link_type (ai), NULL));
-
-      sixrd_ad =
-	sixrd_adj_from_base (adj_delegate_get (adj, sixrd_adj_delegate_type));
-      if (NULL == sixrd_ad)
-	{
-	  pool_get (sixrd_adj_delegate_pool, sixrd_ad);
-	  fib_node_init (&sixrd_ad->sixrd_node, sixrd_fib_node_type);
-	  sixrd_ad->adj_index = ai;
-	  sixrd_ad->sixrd_fib_entry_index =
-	    fib_table_entry_special_add (t->fib_index, &pfx,
-					 FIB_SOURCE_RR, FIB_ENTRY_FLAG_NONE);
-	  sixrd_ad->sixrd_sibling =
-	    fib_entry_child_add (sixrd_ad->sixrd_fib_entry_index,
-				 sixrd_fib_node_type,
-				 sixrd_ad - sixrd_adj_delegate_pool);
-
-	  adj_delegate_add (adj,
-			    sixrd_adj_delegate_type,
-			    sixrd_ad - sixrd_adj_delegate_pool);
-
-	  ip6ip_tunnel_stack (ai, sixrd_ad->sixrd_fib_entry_index);
-	}
-    }
-}
-
-
-clib_error_t *
-sixrd_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
-{
-  /* Always up */
-  vnet_hw_interface_set_flags (vnm, hw_if_index,
-			       VNET_HW_INTERFACE_FLAG_LINK_UP);
-  return /* no error */ 0;
-}
-
-/* *INDENT-OFF* */
-VNET_HW_INTERFACE_CLASS (sixrd_hw_interface_class) =
-{
-  .name = "ip6ip-6rd",
-  .build_rewrite = sixrd_build_rewrite,
-  .update_adjacency = sixrd_update_adj,
-};
-
-VNET_DEVICE_CLASS (sixrd_device_class) =
-{
-  .name = "ip6ip-6rd",
-  .admin_up_down_function = sixrd_interface_admin_up_down,
-#ifdef SOON
-  .clear counter = 0;
-#endif
-};
-/* *INDENT-ON* */
-
-static int
-sixrd_create_tunnel (ip6_address_t * ip6_prefix, u8 ip6_prefix_len,
-		     ip4_address_t * ip4_prefix, u8 ip4_prefix_len,
-		     ip4_address_t * ip4_src, u16 mtu, bool security_check,
-		     u32 fib_index, u32 * sixrd_tunnel_index)
-{
-  sixrd_main_t *sm = &sixrd_main;
-  sixrd_tunnel_t *t;
-
-  if (fib_index == ~0)
-    return VNET_API_ERROR_NO_SUCH_FIB;
-
-  if ((ip6_prefix_len + 32 - ip4_prefix_len) > 64)
-    return VNET_API_ERROR_INVALID_VALUE;
-
-  /* Tunnel already configured */
-  if (find_tunnel (ip6_prefix))
-    return VNET_API_ERROR_INVALID_VALUE;
-  /* Tunnel already configured for this source */
-  if (find_tunnel_by_ip4_address (ip4_src))
-    return VNET_API_ERROR_INVALID_VALUE;
-
-  /* Get tunnel index */
-  pool_get_aligned (sm->tunnels, t, CLIB_CACHE_LINE_BYTES);
-  memset (t, 0, sizeof (*t));
-  t->tunnel_index = t - sm->tunnels;
-
-  /* Init tunnel struct */
-  t->ip4_prefix.as_u32 = ip4_prefix->as_u32;
-  t->ip4_prefix_len = ip4_prefix_len;
-  t->ip6_prefix = *ip6_prefix;
-  t->ip6_prefix_len = ip6_prefix_len;
-  t->ip4_src = *ip4_src;
-  t->mtu = mtu ? mtu : SIXRD_DEFAULT_MTU;
-  t->security_check = security_check;
-
-  t->shift = (ip4_prefix_len < 32) ?
-    64 - ip6_prefix_len - (32 - ip4_prefix_len) : 0;
-
-  /* Create interface */
-  u32 hw_if_index = vnet_register_interface (vnet_get_main (),
-					     sixrd_device_class.index,
-					     t->tunnel_index,
-					     sixrd_hw_interface_class.index,
-					     t->tunnel_index);
-
-  /* Default the interface to up and enable IPv6 (payload) */
-  vnet_hw_interface_t *hi =
-    vnet_get_hw_interface (vnet_get_main (), hw_if_index);
-  t->hw_if_index = hw_if_index;
-  t->fib_index = fib_index;
-  t->sw_if_index = hi->sw_if_index;
-
-  hi->max_l3_packet_bytes[VLIB_RX] = hi->max_l3_packet_bytes[VLIB_TX] =
-    t->mtu;
-
-  vec_validate_init_empty (sm->tunnel_index_by_sw_if_index, hi->sw_if_index,
-			   ~0);
-  sm->tunnel_index_by_sw_if_index[hi->sw_if_index] = t->tunnel_index;
-
-  hash_set (sm->tunnel_by_ip, ip4_src->as_u32, t->tunnel_index);
-
-  vnet_hw_interface_set_flags (vnet_get_main (), hw_if_index,
-			       VNET_HW_INTERFACE_FLAG_LINK_UP);
-  vnet_sw_interface_set_flags (vnet_get_main (), hi->sw_if_index,
-			       VNET_SW_INTERFACE_FLAG_ADMIN_UP);
-
-  /* Create IPv6 route/adjacency */
-  fib_prefix_t pfx6 = {
-    .fp_proto = FIB_PROTOCOL_IP6,
-    .fp_len = t->ip6_prefix_len,
-    .fp_addr = {.ip6 = t->ip6_prefix,}
-    ,
-  };
-
-  fib_table_entry_update_one_path (fib_index, &pfx6,
-				   FIB_SOURCE_CLI, FIB_ENTRY_FLAG_ATTACHED,
-				   DPO_PROTO_IP6, &sixrd_special_nh,
-				   hi->sw_if_index,
-				   ~0, 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
-
-  *sixrd_tunnel_index = hi->sw_if_index;
-
-  ip4_register_protocol (IP_PROTOCOL_IPV6, ip4_sixrd_node.index);
-
-  return 0;
-}
-
-/*
- * sixrd_delete_tunnel
- */
-int
-sixrd_delete_tunnel (u32 sw_if_index)
-{
-  sixrd_main_t *sm = &sixrd_main;
-  sixrd_tunnel_t *t = find_tunnel_by_sw_if_index (sw_if_index);
-
-  if (!t)
-    {
-      clib_warning ("SIXRD tunnel delete: tunnel does not exist: %d",
-		    sw_if_index);
-      return -1;
-    }
-
-  fib_prefix_t pfx6 = {
-    .fp_proto = FIB_PROTOCOL_IP6,
-    .fp_len = t->ip6_prefix_len,
-    .fp_addr = {.ip6 = t->ip6_prefix,}
-    ,
-  };
-  fib_table_entry_special_remove (0, &pfx6, FIB_SOURCE_CLI);
-  vnet_sw_interface_set_flags (vnet_get_main (), t->sw_if_index,
-			       0 /* down */ );
-
-  sm->tunnel_index_by_sw_if_index[t->sw_if_index] = ~0;
-
-  hash_unset (sm->tunnel_by_ip, t->ip4_src.as_u32);
-
-  vnet_delete_hw_interface (vnet_get_main (), t->hw_if_index);
-
-  pool_put (sm->tunnels, t);
-
-  return 0;
-}
-
-static clib_error_t *
-sixrd_add_del_tunnel_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 ip4_prefix;
-  ip6_address_t ip6_prefix;
-  ip4_address_t ip4_src;
-  u32 ip6_prefix_len = 0, ip4_prefix_len = 0, sixrd_tunnel_index;
-  u32 num_m_args = 0;
-  /* Optional arguments */
-  u32 mtu = 0;
-  u32 fib_index = 0;
-  clib_error_t *error = 0;
-  bool is_add = true, security_check = false;
-
-  /* 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, "del"))
-	is_add = false;
-      if (unformat (line_input, "security-check"))
-	security_check = true;
-      else
-	if (unformat
-	    (line_input, "ip6-pfx %U/%d", unformat_ip6_address, &ip6_prefix,
-	     &ip6_prefix_len))
-	num_m_args++;
-      else if (unformat (line_input, "ip4-pfx %U/%d", unformat_ip4_address,
-			 &ip4_prefix, &ip4_prefix_len))
-	num_m_args++;
-      else
-	if (unformat
-	    (line_input, "ip4-src %U", unformat_ip4_address, &ip4_src))
-	num_m_args++;
-      else if (unformat (line_input, "mtu %d", &mtu))
-	num_m_args++;
-      else if (unformat (line_input, "fib-id %d", &fib_index))
-	;
-      else
-	{
-	  error =
-	    clib_error_return (0, "unknown input `%U'", format_unformat_error,
-			       line_input);
-	  goto done;
-	}
-    }
-
-  if (num_m_args < 3)
-    {
-      error = clib_error_return (0, "mandatory argument(s) missing");
-      goto done;
-    }
-  if (is_add)
-    {
-      int rv = sixrd_create_tunnel (&ip6_prefix, ip6_prefix_len, &ip4_prefix,
-				    ip4_prefix_len, &ip4_src, mtu,
-				    security_check,
-				    fib_index, &sixrd_tunnel_index);
-      if (rv)
-	error = clib_error_return (0, "adding tunnel failed");
-    }
-  else
-    {
-      sixrd_tunnel_t *t = find_tunnel (&ip6_prefix);
-      if (t)
-	{
-	  sixrd_delete_tunnel (t->sw_if_index);
-	}
-    }
-
-done:
-  unformat_free (line_input);
-
-  return error;
-}
-
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (sixrd_add_del_tunnel_command, static) =
-{
-  .path = "create 6rd tunnel",
-  .short_help = "create 6rd tunnel ip6-pfx <ip6-pfx> ip4-pfx <ip4-pfx> "
-  "ip4-src <ip4-addr> [del]",
-  .function = sixrd_add_del_tunnel_command_fn,
-};
-/* *INDENT-ON* */
-
-static void
-vl_api_sixrd_add_tunnel_t_handler (vl_api_sixrd_add_tunnel_t * mp)
-{
-  sixrd_main_t *sm = &sixrd_main;
-  vl_api_sixrd_add_tunnel_reply_t *rmp;
-  u32 sixrd_tunnel_index;
-
-  int rv = sixrd_create_tunnel ((ip6_address_t *) & mp->ip6_prefix,
-				mp->ip6_prefix_len,
-				(ip4_address_t *) & mp->ip4_prefix,
-				mp->ip4_prefix_len,
-				(ip4_address_t *) & mp->ip4_src,
-				ntohs (mp->mtu),
-				mp->security_check, ntohl (mp->fib_index),
-				&sixrd_tunnel_index);
-
-  REPLY_MACRO2 (VL_API_SIXRD_ADD_TUNNEL_REPLY, (
-						 {
-						 rmp->sw_if_index =
-						 htonl (sixrd_tunnel_index);
-						 }));
-}
-
-static void
-vl_api_sixrd_del_tunnel_t_handler (vl_api_sixrd_del_tunnel_t * mp)
-{
-  sixrd_main_t *sm = &sixrd_main;
-  vl_api_sixrd_del_tunnel_reply_t *rmp;
-
-  int rv = sixrd_delete_tunnel (ntohl (mp->sw_if_index));
-
-  REPLY_MACRO (VL_API_SIXRD_DEL_TUNNEL_REPLY);
-}
-
-/* List of message types that this plugin understands */
-
-#define foreach_sixrd_plugin_api_msg		\
-_(SIXRD_ADD_TUNNEL, sixrd_add_tunnel)		\
-_(SIXRD_DEL_TUNNEL, sixrd_del_tunnel)
-
-/* *INDENT-OFF* */
-VLIB_PLUGIN_REGISTER() = {
-    .version = VPP_BUILD_VER,
-    .description = "IPv6 Rapid Deployment on IPv4 Infrastructure (RFC5969)",
-};
-/* *INDENT-ON* */
-
-/**
- * @brief Set up the API message handling tables.
- */
-static clib_error_t *
-sixrd_plugin_api_hookup (vlib_main_t * vm)
-{
-  sixrd_main_t *sm = &sixrd_main;
-
-#define _(N, n)                                                                \
-  vl_msg_api_set_handlers((VL_API_##N + sm->msg_id_base), #n,                  \
-                          vl_api_##n##_t_handler, vl_noop_handler,             \
-                          vl_api_##n##_t_endian, vl_api_##n##_t_print,         \
-                          sizeof(vl_api_##n##_t), 1);
-  foreach_sixrd_plugin_api_msg;
-#undef _
-
-  return 0;
-}
-
-#define vl_msg_name_crc_list
-#include "sixrd_all_api_h.h"
-#undef vl_msg_name_crc_list
-
-static void
-setup_message_id_table (sixrd_main_t * sm, api_main_t * am)
-{
-#define _(id, n, crc)                                                          \
-  vl_msg_api_add_msg_name_crc(am, #n "_" #crc, id + sm->msg_id_base);
-  foreach_vl_msg_name_crc_sixrd;
-#undef _
-}
-
-static void
-sixrd_adj_delegate_adj_deleted (adj_delegate_t * aed)
-{
-  sixrd_adj_delegate_t *sixrd_ad;
-
-  sixrd_ad = sixrd_adj_from_base (aed);
-
-  fib_entry_child_remove (sixrd_ad->sixrd_fib_entry_index,
-			  sixrd_ad->sixrd_sibling);
-  fib_table_entry_delete_index (sixrd_ad->sixrd_fib_entry_index,
-				FIB_SOURCE_RR);
-
-  pool_put (sixrd_adj_delegate_pool, sixrd_ad);
-}
-
-static u8 *
-sixrd_adj_delegate_format (const adj_delegate_t * aed, u8 * s)
-{
-  const sixrd_adj_delegate_t *sixrd_ad;
-
-  sixrd_ad = sixrd_adj_from_const_base (aed);
-
-  s = format (s, "SIXRD:[fib-entry:%d]", sixrd_ad->sixrd_fib_entry_index);
-
-  return (s);
-}
-
-static void
-sixrd_fib_node_last_lock_gone (fib_node_t * node)
-{
-  // top of the dependency tree, locks not managed here.
-}
-
-static sixrd_adj_delegate_t *
-sixrd_adj_delegate_from_fib_node (fib_node_t * node)
-{
-  return ((sixrd_adj_delegate_t *) (((char *) node) -
-				    STRUCT_OFFSET_OF (sixrd_adj_delegate_t,
-						      sixrd_node)));
-}
-
-static fib_node_back_walk_rc_t
-sixrd_fib_node_back_walk_notify (fib_node_t * node,
-				 fib_node_back_walk_ctx_t * ctx)
-{
-  sixrd_adj_delegate_t *sixrd_ad;
-
-  sixrd_ad = sixrd_adj_delegate_from_fib_node (node);
-
-  ip6ip_tunnel_stack (sixrd_ad->adj_index, sixrd_ad->sixrd_fib_entry_index);
-
-  return (FIB_NODE_BACK_WALK_CONTINUE);
-}
-
-/**
- * Function definition to get a FIB node from its index
- */
-static fib_node_t *
-sixrd_fib_node_get (fib_node_index_t index)
-{
-  sixrd_adj_delegate_t *sixrd_ad;
-
-  sixrd_ad = pool_elt_at_index (sixrd_adj_delegate_pool, index);
-
-  return (&sixrd_ad->sixrd_node);
-}
-
-/**
- * VFT registered with the adjacency delegate
- */
-const static adj_delegate_vft_t sixrd_adj_delegate_vft = {
-  .adv_adj_deleted = sixrd_adj_delegate_adj_deleted,
-  .adv_format = sixrd_adj_delegate_format,
-};
-
-/**
- * VFT registered with the FIB node for the adj delegate
- */
-const static fib_node_vft_t sixrd_fib_node_vft = {
-  .fnv_get = sixrd_fib_node_get,
-  .fnv_last_lock = sixrd_fib_node_last_lock_gone,
-  .fnv_back_walk = sixrd_fib_node_back_walk_notify,
-};
-
-static clib_error_t *
-sixrd_init (vlib_main_t * vm)
-{
-  sixrd_main_t *sm = &sixrd_main;
-  clib_error_t *error = 0;
-  u8 *name;
-
-  name = format (0, "sixrd_%08x%c", api_version, 0);
-
-  sm->msg_id_base =
-    vl_msg_api_get_msg_ids ((char *) name, VL_MSG_FIRST_AVAILABLE);
-  vec_free (name);
-  error = sixrd_plugin_api_hookup (vm);
-
-  setup_message_id_table (sm, &api_main);
-
-  sixrd_adj_delegate_type =
-    adj_delegate_register_new_type (&sixrd_adj_delegate_vft);
-  sixrd_fib_node_type = fib_node_register_new_type (&sixrd_fib_node_vft);
-
-  return error;
-}
-
-VLIB_INIT_FUNCTION (sixrd_init);
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
diff --git a/src/plugins/sixrd/sixrd.h b/src/plugins/sixrd/sixrd.h
deleted file mode 100644
index f443c039a13..00000000000
--- a/src/plugins/sixrd/sixrd.h
+++ /dev/null
@@ -1,123 +0,0 @@
-/*---------------------------------------------------------------------------
- * Copyright (c) 2009-2014 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 <stdbool.h>
-#include <vnet/fib/ip6_fib.h>
-#include <vnet/ip/ip.h>
-#include <vnet/vnet.h>
-#include <vppinfra/error.h>
-
-#define SIXRD_DEFAULT_MTU 1480	/* 1500 - IPv4 header */
-
-typedef struct
-{
-  u32 fib_index;
-  u32 hw_if_index;
-  u32 sw_if_index;
-  u32 tunnel_index;
-  ip6_address_t ip6_prefix;
-  ip4_address_t ip4_prefix;
-  ip4_address_t ip4_src;
-  u8 ip6_prefix_len;
-  u8 ip4_prefix_len;
-
-  /* helpers */
-  u8 shift;
-
-  u16 mtu;
-  bool security_check;
-} sixrd_tunnel_t;
-
-typedef struct
-{
-  u16 msg_id_base;
-
-  /* pool of SIXRD domains */
-  sixrd_tunnel_t *tunnels;
-  u32 *tunnel_index_by_sw_if_index;
-  uword *tunnel_by_ip;
-
-} sixrd_main_t;
-
-#define foreach_sixrd_error                                                    \
-  /* Must be first. */                                                         \
-  _(NONE, "valid SIXRD packets")                                               \
-  _(BAD_PROTOCOL, "bad protocol")                                              \
-  _(SEC_CHECK, "security check failed")                                        \
-  _(NO_TUNNEL, "no tunnel")
-
-
-typedef enum
-{
-#define _(sym, str) SIXRD_ERROR_##sym,
-  foreach_sixrd_error
-#undef _
-    SIXRD_N_ERROR,
-} sixrd_error_t;
-
-extern sixrd_main_t sixrd_main;
-
-/*
- * sixrd_get_addr
- */
-static_always_inline u32
-sixrd_get_addr_net (const sixrd_tunnel_t * t, u64 dal)
-{
-  /* 1:1 mode */
-  if (t->ip4_prefix_len == 32)
-    return (t->ip4_prefix.as_u32);
-
-  dal = clib_net_to_host_u64 (dal);
-
-  /* Grab 32 - ip4_prefix_len bits out of IPv6 address from offset
-   * ip6_prefix_len */
-  u32 mask = ~(~0ULL << (32 - t->ip4_prefix_len));
-  u32 ip4 =
-    clib_net_to_host_u32 (t->
-			  ip4_prefix.as_u32) | ((u32) (dal >> t->
-						       shift) & mask);
-  return clib_host_to_net_u32 (ip4);
-}
-
-static_always_inline sixrd_tunnel_t *
-find_tunnel_by_ip4_address (ip4_address_t * ip)
-{
-  sixrd_main_t *sm = &sixrd_main;
-  uword *p;
-  p = hash_get (sm->tunnel_by_ip, ip->as_u32);
-  if (!p)
-    return NULL;
-  return pool_elt_at_index (sm->tunnels, p[0]);
-}
-
-static_always_inline sixrd_tunnel_t *
-ip4_sixrd_get_tunnel (u32 sdi, ip4_address_t * addr, u8 * error)
-{
-  sixrd_tunnel_t *t = find_tunnel_by_ip4_address (addr);
-  if (!t)
-    {
-      *error = SIXRD_ERROR_NO_TUNNEL;
-      return NULL;
-    }
-  return t;
-}
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
diff --git a/src/plugins/sixrd/sixrd_all_api_h.h b/src/plugins/sixrd/sixrd_all_api_h.h
deleted file mode 100644
index 21111c28b95..00000000000
--- a/src/plugins/sixrd/sixrd_all_api_h.h
+++ /dev/null
@@ -1,16 +0,0 @@
-/*
- * Copyright (c) 2016 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 the generated file, see BUILT_SOURCES in Makefile.am */
-#include <sixrd/sixrd.api.h>
diff --git a/src/plugins/sixrd/sixrd_msg_enum.h b/src/plugins/sixrd/sixrd_msg_enum.h
deleted file mode 100644
index 46528c198b3..00000000000
--- a/src/plugins/sixrd/sixrd_msg_enum.h
+++ /dev/null
@@ -1,28 +0,0 @@
-/*
- * Copyright (c) 2016 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.
- */
-#ifndef included_sixrd_msg_enum_h
-#define included_sixrd_msg_enum_h
-
-#include <vppinfra/byte_order.h>
-
-#define vl_msg_id(n,h) n,
-typedef enum {
-#include <sixrd/sixrd_all_api_h.h>
-    /* We'll want to know how many messages IDs we need... */
-    VL_MSG_FIRST_AVAILABLE,
-} vl_msg_id_t;
-#undef vl_msg_id
-
-#endif