1 files changed, 659 insertions, 0 deletions

diff --git a/vpp/vnet/vnet/vxlan-gpe/vxlan_gpe.c b/vpp/vnet/vnet/vxlan-gpe/vxlan_gpe.c
new file mode 100644
index 00000000..b97510c4
--- /dev/null
+++ b/vpp/vnet/vnet/vxlan-gpe/vxlan_gpe.c
@@ -0,0 +1,659 @@
+/*
+ * 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.
+ */
+/**
+ *  @file
+ *  @brief Common utility functions for IPv4 and IPv6 VXLAN GPE tunnels
+ *
+*/
+#include <vnet/vxlan-gpe/vxlan_gpe.h>
+#include <vnet/fib/fib.h>
+#include <vnet/ip/format.h>
+
+vxlan_gpe_main_t vxlan_gpe_main;
+
+/**
+ * @brief Tracing function for VXLAN GPE tunnel packets
+ *
+ * @param *s formatting string
+ * @param *args
+ *
+ * @return *s formatted string
+ *
+ */
+u8 * format_vxlan_gpe_tunnel (u8 * s, va_list * args)
+{
+  vxlan_gpe_tunnel_t * t = va_arg (*args, vxlan_gpe_tunnel_t *);
+  vxlan_gpe_main_t * gm = &vxlan_gpe_main;
+
+  s = format (s, "[%d] local: %U remote: %U ",
+              t - gm->tunnels,
+              format_ip46_address, &t->local, IP46_TYPE_ANY,
+              format_ip46_address, &t->remote, IP46_TYPE_ANY);
+
+  s = format (s, "  vxlan VNI %d ", t->vni);
+
+  switch (t->protocol)
+    {
+    case VXLAN_GPE_PROTOCOL_IP4:
+      s = format (s, "next-protocol ip4");
+      break;
+    case VXLAN_GPE_PROTOCOL_IP6:
+      s = format (s, "next-protocol ip6");
+      break;
+    case VXLAN_GPE_PROTOCOL_ETHERNET:
+      s = format (s, "next-protocol ethernet");
+      break;
+    case VXLAN_GPE_PROTOCOL_NSH:
+      s = format (s, "next-protocol nsh");
+      break;
+    default:
+      s = format (s, "next-protocol unknown %d", t->protocol);
+    }
+
+  s = format (s, " fibs: (encap %d, decap %d)",
+              t->encap_fib_index,
+              t->decap_fib_index);
+
+  return s;
+}
+
+/**
+ * @brief Naming for VXLAN GPE tunnel
+ *
+ * @param *s formatting string
+ * @param *args
+ *
+ * @return *s formatted string
+ *
+ */
+static u8 * format_vxlan_gpe_name (u8 * s, va_list * args)
+{
+  u32 dev_instance = va_arg (*args, u32);
+  return format (s, "vxlan_gpe_tunnel%d", dev_instance);
+}
+
+static uword dummy_interface_tx (vlib_main_t * vm,
+                                 vlib_node_runtime_t * node,
+                                 vlib_frame_t * frame)
+{
+  clib_warning ("you shouldn't be here, leaking buffers...");
+  return frame->n_vectors;
+}
+
+/**
+ * @brief CLI function for VXLAN GPE admin up/down
+ *
+ * @param *vnm
+ * @param hw_if_index
+ * @param flag
+ *
+ * @return *rc
+ *
+ */
+static clib_error_t *
+vxlan_gpe_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
+{
+  if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
+    vnet_hw_interface_set_flags (vnm, hw_if_index, VNET_HW_INTERFACE_FLAG_LINK_UP);
+  else
+    vnet_hw_interface_set_flags (vnm, hw_if_index, 0);
+
+  return 0;
+}
+
+VNET_DEVICE_CLASS (vxlan_gpe_device_class,static) = {
+  .name = "VXLAN_GPE",
+  .format_device_name = format_vxlan_gpe_name,
+  .format_tx_trace = format_vxlan_gpe_encap_trace,
+  .tx_function = dummy_interface_tx,
+  .admin_up_down_function = vxlan_gpe_interface_admin_up_down,
+};
+
+
+/**
+ * @brief Formatting function for tracing VXLAN GPE with length
+ *
+ * @param *s
+ * @param *args
+ *
+ * @return *s
+ *
+ */
+static u8 * format_vxlan_gpe_header_with_length (u8 * s, va_list * args)
+{
+  u32 dev_instance = va_arg (*args, u32);
+  s = format (s, "unimplemented dev %u", dev_instance);
+  return s;
+}
+
+VNET_HW_INTERFACE_CLASS (vxlan_gpe_hw_class) = {
+  .name = "VXLAN_GPE",
+  .format_header = format_vxlan_gpe_header_with_length,
+  .build_rewrite = default_build_rewrite,
+  .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
+};
+
+
+#define foreach_gpe_copy_field                  \
+_(vni)                                          \
+_(protocol)                                \
+_(encap_fib_index)                              \
+_(decap_fib_index)
+
+#define foreach_copy_ipv4 {                     \
+  _(local.ip4.as_u32)                           \
+  _(remote.ip4.as_u32)                          \
+}
+
+#define foreach_copy_ipv6 {                     \
+  _(local.ip6.as_u64[0])                        \
+  _(local.ip6.as_u64[1])                        \
+  _(remote.ip6.as_u64[0])                       \
+  _(remote.ip6.as_u64[1])                       \
+}
+
+
+/**
+ * @brief Calculate IPv4 VXLAN GPE rewrite header
+ *
+ * @param *t
+ *
+ * @return rc
+ *
+ */
+int vxlan4_gpe_rewrite (vxlan_gpe_tunnel_t * t, u32 extension_size, 
+                        u8 protocol_override, uword encap_next_node)
+{
+  u8 *rw = 0;
+  ip4_header_t * ip0;
+  ip4_vxlan_gpe_header_t * h0;
+  int len;
+
+  len = sizeof (*h0) + extension_size;
+
+  vec_free(t->rewrite);
+  vec_validate_aligned (rw, len-1, CLIB_CACHE_LINE_BYTES);
+
+  h0 = (ip4_vxlan_gpe_header_t *) rw;
+
+  /* Fixed portion of the (outer) ip4 header */
+  ip0 = &h0->ip4;
+  ip0->ip_version_and_header_length = 0x45;
+  ip0->ttl = 254;
+  ip0->protocol = IP_PROTOCOL_UDP;
+
+  /* we fix up the ip4 header length and checksum after-the-fact */
+  ip0->src_address.as_u32 = t->local.ip4.as_u32;
+  ip0->dst_address.as_u32 = t->remote.ip4.as_u32;
+  ip0->checksum = ip4_header_checksum (ip0);
+
+  /* UDP header, randomize src port on something, maybe? */
+  h0->udp.src_port = clib_host_to_net_u16 (4790);
+  h0->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_vxlan_gpe);
+
+  /* VXLAN header. Are we having fun yet? */
+  h0->vxlan.flags = VXLAN_GPE_FLAGS_I | VXLAN_GPE_FLAGS_P;
+  h0->vxlan.ver_res = VXLAN_GPE_VERSION;
+  if (protocol_override)
+  {
+      h0->vxlan.protocol = protocol_override;
+  }
+  else
+  {
+      h0->vxlan.protocol = t->protocol;
+  }
+  t->rewrite_size = sizeof(ip4_vxlan_gpe_header_t) +  extension_size;
+  h0->vxlan.vni_res = clib_host_to_net_u32 (t->vni<<8);
+
+  t->rewrite = rw;
+  t->encap_next_node = encap_next_node;
+  return (0);
+}
+
+/**
+ * @brief Calculate IPv6 VXLAN GPE rewrite header
+ *
+ * @param *t
+ *
+ * @return rc
+ *
+ */
+int vxlan6_gpe_rewrite (vxlan_gpe_tunnel_t * t, u32 extension_size, 
+                        u8 protocol_override, uword encap_next_node)
+{
+  u8 *rw = 0;
+  ip6_header_t * ip0;
+  ip6_vxlan_gpe_header_t * h0;
+  int len;
+
+  len = sizeof (*h0) + extension_size;
+
+  vec_free(t->rewrite);
+  vec_validate_aligned (rw, len-1, CLIB_CACHE_LINE_BYTES);
+
+  h0 = (ip6_vxlan_gpe_header_t *) rw;
+
+  /* Fixed portion of the (outer) ip4 header */
+  ip0 = &h0->ip6;
+  ip0->ip_version_traffic_class_and_flow_label = clib_host_to_net_u32(6 << 28);
+  ip0->hop_limit = 255;
+  ip0->protocol = IP_PROTOCOL_UDP;
+
+  ip0->src_address.as_u64[0] = t->local.ip6.as_u64[0];
+  ip0->src_address.as_u64[1] = t->local.ip6.as_u64[1];
+  ip0->dst_address.as_u64[0] = t->remote.ip6.as_u64[0];
+  ip0->dst_address.as_u64[1] = t->remote.ip6.as_u64[1];
+
+  /* UDP header, randomize src port on something, maybe? */
+  h0->udp.src_port = clib_host_to_net_u16 (4790);
+  h0->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_vxlan_gpe);
+
+  /* VXLAN header. Are we having fun yet? */
+  h0->vxlan.flags = VXLAN_GPE_FLAGS_I | VXLAN_GPE_FLAGS_P;
+  h0->vxlan.ver_res = VXLAN_GPE_VERSION;
+  if (protocol_override)
+  {
+      h0->vxlan.protocol = t->protocol;
+  }
+  else
+  {
+      h0->vxlan.protocol = protocol_override;
+  }
+  t->rewrite_size = sizeof(ip4_vxlan_gpe_header_t) +  extension_size;
+  h0->vxlan.vni_res = clib_host_to_net_u32 (t->vni<<8);
+
+  t->rewrite = rw;
+  t->encap_next_node = encap_next_node;
+  return (0);
+}
+
+/**
+ * @brief Add or Del a VXLAN GPE tunnel
+ *
+ * @param *a
+ * @param *sw_if_index
+ *
+ * @return rc
+ *
+ */
+int vnet_vxlan_gpe_add_del_tunnel
+(vnet_vxlan_gpe_add_del_tunnel_args_t *a, u32 * sw_if_indexp)
+{
+  vxlan_gpe_main_t * gm = &vxlan_gpe_main;
+  vxlan_gpe_tunnel_t *t = 0;
+  vnet_main_t * vnm = gm->vnet_main;
+  vnet_hw_interface_t * hi;
+  uword * p;
+  u32 hw_if_index = ~0;
+  u32 sw_if_index = ~0;
+  int rv;
+  vxlan4_gpe_tunnel_key_t key4, *key4_copy;
+  vxlan6_gpe_tunnel_key_t key6, *key6_copy;
+  hash_pair_t *hp;
+
+  if (!a->is_ip6)
+  {
+    key4.local = a->local.ip4.as_u32;
+    key4.remote = a->remote.ip4.as_u32;
+    key4.vni = clib_host_to_net_u32 (a->vni << 8);
+    key4.pad = 0;
+
+    p = hash_get_mem(gm->vxlan4_gpe_tunnel_by_key, &key4);
+  }
+  else
+  {
+    key6.local.as_u64[0] = a->local.ip6.as_u64[0];
+    key6.local.as_u64[1] = a->local.ip6.as_u64[1];
+    key6.remote.as_u64[0] = a->remote.ip6.as_u64[0];
+    key6.remote.as_u64[1] = a->remote.ip6.as_u64[1];
+    key6.vni = clib_host_to_net_u32 (a->vni << 8);
+
+    p = hash_get_mem(gm->vxlan6_gpe_tunnel_by_key, &key6);
+  }
+
+  if (a->is_add)
+    {
+      /* adding a tunnel: tunnel must not already exist */
+      if (p)
+        return VNET_API_ERROR_INVALID_VALUE;
+
+      pool_get_aligned (gm->tunnels, t, CLIB_CACHE_LINE_BYTES);
+      memset (t, 0, sizeof (*t));
+
+      /* copy from arg structure */
+#define _(x) t->x = a->x;
+      foreach_gpe_copy_field;
+      if (!a->is_ip6) foreach_copy_ipv4
+      else            foreach_copy_ipv6
+#undef _
+
+      if (!a->is_ip6) t->flags |= VXLAN_GPE_TUNNEL_IS_IPV4;
+
+      if (!a->is_ip6) {
+        rv = vxlan4_gpe_rewrite (t, 0, 0, VXLAN_GPE_ENCAP_NEXT_IP4_LOOKUP);
+      } else {
+        rv = vxlan6_gpe_rewrite (t, 0, 0, VXLAN_GPE_ENCAP_NEXT_IP6_LOOKUP);
+      }
+
+      if (rv)
+      {
+          pool_put (gm->tunnels, t);
+          return rv;
+      }
+
+      if (!a->is_ip6)
+      {
+        key4_copy = clib_mem_alloc (sizeof (*key4_copy));
+        clib_memcpy (key4_copy, &key4, sizeof (*key4_copy));
+        hash_set_mem (gm->vxlan4_gpe_tunnel_by_key, key4_copy,
+                      t - gm->tunnels);
+      }
+      else
+      {
+          key6_copy = clib_mem_alloc (sizeof (*key6_copy));
+          clib_memcpy (key6_copy, &key6, sizeof (*key6_copy));
+          hash_set_mem (gm->vxlan6_gpe_tunnel_by_key, key6_copy,
+                        t - gm->tunnels);
+      }
+
+      if (vec_len (gm->free_vxlan_gpe_tunnel_hw_if_indices) > 0)
+        {
+          hw_if_index = gm->free_vxlan_gpe_tunnel_hw_if_indices
+            [vec_len (gm->free_vxlan_gpe_tunnel_hw_if_indices)-1];
+          _vec_len (gm->free_vxlan_gpe_tunnel_hw_if_indices) -= 1;
+
+          hi = vnet_get_hw_interface (vnm, hw_if_index);
+          hi->dev_instance = t - gm->tunnels;
+          hi->hw_instance = hi->dev_instance;
+        }
+      else
+        {
+          hw_if_index = vnet_register_interface
+            (vnm, vxlan_gpe_device_class.index, t - gm->tunnels,
+             vxlan_gpe_hw_class.index, t - gm->tunnels);
+          hi = vnet_get_hw_interface (vnm, hw_if_index);
+          hi->output_node_index = vxlan_gpe_encap_node.index;
+        }
+
+      t->hw_if_index = hw_if_index;
+      t->sw_if_index = sw_if_index = hi->sw_if_index;
+      vec_validate_init_empty (gm->tunnel_index_by_sw_if_index, sw_if_index, ~0);
+      gm->tunnel_index_by_sw_if_index[sw_if_index] = t - gm->tunnels;
+
+      vnet_sw_interface_set_flags (vnm, hi->sw_if_index,
+                                   VNET_SW_INTERFACE_FLAG_ADMIN_UP);
+    }
+  else
+    {
+      /* deleting a tunnel: tunnel must exist */
+      if (!p)
+        return VNET_API_ERROR_NO_SUCH_ENTRY;
+
+      t = pool_elt_at_index (gm->tunnels, p[0]);
+
+      vnet_sw_interface_set_flags (vnm, t->sw_if_index, 0 /* down */);
+      vec_add1 (gm->free_vxlan_gpe_tunnel_hw_if_indices, t->hw_if_index);
+
+      gm->tunnel_index_by_sw_if_index[t->sw_if_index] = ~0;
+
+      if (!a->is_ip6)
+      {
+        hp = hash_get_pair (gm->vxlan4_gpe_tunnel_by_key, &key4);
+        key4_copy = (void *)(hp->key);
+        hash_unset_mem (gm->vxlan4_gpe_tunnel_by_key, &key4);
+        clib_mem_free (key4_copy);
+      }
+      else
+      {
+        hp = hash_get_pair (gm->vxlan6_gpe_tunnel_by_key, &key6);
+        key6_copy = (void *)(hp->key);
+        hash_unset_mem (gm->vxlan4_gpe_tunnel_by_key, &key6);
+        clib_mem_free (key6_copy);
+      }
+
+      vec_free (t->rewrite);
+      pool_put (gm->tunnels, t);
+    }
+
+  if (sw_if_indexp)
+      *sw_if_indexp = sw_if_index;
+
+  return 0;
+}
+
+static clib_error_t *
+vxlan_gpe_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;
+  u8 is_add = 1;
+  ip46_address_t local, remote;
+  u8 local_set = 0;
+  u8 remote_set = 0;
+  u8 ipv4_set = 0;
+  u8 ipv6_set = 0;
+  u32 encap_fib_index = 0;
+  u32 decap_fib_index = 0;
+  u8 protocol = VXLAN_GPE_PROTOCOL_IP4;
+  u32 vni;
+  u8 vni_set = 0;
+  int rv;
+  u32 tmp;
+  vnet_vxlan_gpe_add_del_tunnel_args_t _a, * a = &_a;
+  u32 sw_if_index;
+
+  /* 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 = 0;
+    else if (unformat (line_input, "local %U",
+                       unformat_ip4_address, &local.ip4))
+    {
+      local_set = 1;
+      ipv4_set = 1;
+    }
+    else if (unformat (line_input, "remote %U",
+                       unformat_ip4_address, &remote.ip4))
+    {
+      remote_set = 1;
+      ipv4_set = 1;
+    }
+    else if (unformat (line_input, "local %U",
+                       unformat_ip6_address, &local.ip6))
+    {
+      local_set = 1;
+      ipv6_set = 1;
+    }
+    else if (unformat (line_input, "remote %U",
+                       unformat_ip6_address, &remote.ip6))
+    {
+      remote_set = 1;
+      ipv6_set = 1;
+    }
+    else if (unformat (line_input, "encap-vrf-id %d", &tmp))
+      {
+        if (ipv6_set)
+          encap_fib_index = ip6_fib_index_from_table_id (tmp);
+        else
+          encap_fib_index =  ip4_fib_index_from_table_id (tmp);
+
+        if (encap_fib_index == ~0)
+          return clib_error_return (0, "nonexistent encap fib id %d", tmp);
+      }
+    else if (unformat (line_input, "decap-vrf-id %d", &tmp))
+      {
+        if (ipv6_set)
+          decap_fib_index = ip6_fib_index_from_table_id (tmp);
+        else
+          decap_fib_index = ip4_fib_index_from_table_id (tmp);
+
+        if (decap_fib_index == ~0)
+          return clib_error_return (0, "nonexistent decap fib id %d", tmp);
+      }
+    else if (unformat (line_input, "vni %d", &vni))
+      vni_set = 1;
+    else if (unformat(line_input, "next-ip4"))
+      protocol = VXLAN_GPE_PROTOCOL_IP4;
+    else if (unformat(line_input, "next-ip6"))
+      protocol = VXLAN_GPE_PROTOCOL_IP6;
+    else if (unformat(line_input, "next-ethernet"))
+      protocol = VXLAN_GPE_PROTOCOL_ETHERNET;
+    else if (unformat(line_input, "next-nsh"))
+      protocol = VXLAN_GPE_PROTOCOL_NSH;
+    else
+      return clib_error_return (0, "parse error: '%U'",
+                                format_unformat_error, line_input);
+  }
+
+  unformat_free (line_input);
+
+  if (local_set == 0)
+    return clib_error_return (0, "tunnel local address not specified");
+
+  if (remote_set == 0)
+    return clib_error_return (0, "tunnel remote address not specified");
+
+  if (ipv4_set && ipv6_set)
+    return clib_error_return (0, "both IPv4 and IPv6 addresses specified");
+
+  if ((ipv4_set && memcmp(&local.ip4, &remote.ip4, sizeof(local.ip4)) == 0) ||
+      (ipv6_set && memcmp(&local.ip6, &remote.ip6, sizeof(local.ip6)) == 0))
+    return clib_error_return (0, "src and dst addresses are identical");
+
+  if (vni_set == 0)
+    return clib_error_return (0, "vni not specified");
+
+  memset (a, 0, sizeof (*a));
+
+  a->is_add = is_add;
+  a->is_ip6 = ipv6_set;
+
+#define _(x) a->x = x;
+  foreach_gpe_copy_field;
+  if (ipv4_set) foreach_copy_ipv4
+  else          foreach_copy_ipv6
+#undef _
+
+  rv = vnet_vxlan_gpe_add_del_tunnel (a, &sw_if_index);
+
+  switch(rv)
+    {
+    case 0:
+      vlib_cli_output(vm, "%U\n", format_vnet_sw_if_index_name, vnet_get_main(), sw_if_index);
+      break;
+    case VNET_API_ERROR_INVALID_DECAP_NEXT:
+      return clib_error_return (0, "invalid decap-next...");
+
+    case VNET_API_ERROR_TUNNEL_EXIST:
+      return clib_error_return (0, "tunnel already exists...");
+
+    case VNET_API_ERROR_NO_SUCH_ENTRY:
+      return clib_error_return (0, "tunnel does not exist...");
+
+    default:
+      return clib_error_return
+        (0, "vnet_vxlan_gpe_add_del_tunnel returned %d", rv);
+    }
+
+  return 0;
+}
+
+VLIB_CLI_COMMAND (create_vxlan_gpe_tunnel_command, static) = {
+  .path = "create vxlan-gpe tunnel",
+  .short_help =
+  "create vxlan-gpe tunnel local <local-addr> remote <remote-addr>"
+  " vni <nn> [next-ip4][next-ip6][next-ethernet][next-nsh]"
+  " [encap-vrf-id <nn>] [decap-vrf-id <nn>]"
+  " [del]\n",
+  .function = vxlan_gpe_add_del_tunnel_command_fn,
+};
+
+/**
+ * @brief CLI function for showing VXLAN GPE tunnels
+ *
+ * @param *vm
+ * @param *input
+ * @param *cmd
+ *
+ * @return error
+ *
+ */
+static clib_error_t *
+show_vxlan_gpe_tunnel_command_fn (vlib_main_t * vm,
+                                unformat_input_t * input,
+                                vlib_cli_command_t * cmd)
+{
+  vxlan_gpe_main_t * gm = &vxlan_gpe_main;
+  vxlan_gpe_tunnel_t * t;
+
+  if (pool_elts (gm->tunnels) == 0)
+    vlib_cli_output (vm, "No vxlan-gpe tunnels configured.");
+
+  pool_foreach (t, gm->tunnels,
+  ({
+    vlib_cli_output (vm, "%U", format_vxlan_gpe_tunnel, t);
+  }));
+
+  return 0;
+}
+
+VLIB_CLI_COMMAND (show_vxlan_gpe_tunnel_command, static) = {
+    .path = "show vxlan-gpe",
+    .function = show_vxlan_gpe_tunnel_command_fn,
+};
+
+/**
+ * @brief Feature init function for VXLAN GPE
+ *
+ * @param *vm
+ *
+ * @return error
+ *
+ */
+clib_error_t *vxlan_gpe_init (vlib_main_t *vm)
+{
+  vxlan_gpe_main_t *gm = &vxlan_gpe_main;
+
+  gm->vnet_main = vnet_get_main();
+  gm->vlib_main = vm;
+
+  gm->vxlan4_gpe_tunnel_by_key
+    = hash_create_mem (0, sizeof(vxlan4_gpe_tunnel_key_t), sizeof (uword));
+
+  gm->vxlan6_gpe_tunnel_by_key
+    = hash_create_mem (0, sizeof(vxlan6_gpe_tunnel_key_t), sizeof (uword));
+
+
+  udp_register_dst_port (vm, UDP_DST_PORT_vxlan_gpe,
+                         vxlan4_gpe_input_node.index, 1 /* is_ip4 */);
+  udp_register_dst_port (vm, UDP_DST_PORT_vxlan6_gpe,
+                         vxlan6_gpe_input_node.index, 0 /* is_ip4 */);
+
+  /* Register the list of standard decap protocols supported */
+  vxlan_gpe_register_decap_protocol (VXLAN_GPE_PROTOCOL_IP4,
+                                     VXLAN_GPE_INPUT_NEXT_IP4_INPUT);
+  vxlan_gpe_register_decap_protocol (VXLAN_GPE_PROTOCOL_IP6,
+                                     VXLAN_GPE_INPUT_NEXT_IP6_INPUT);
+  vxlan_gpe_register_decap_protocol (VXLAN_GPE_PROTOCOL_ETHERNET,
+                                     VXLAN_GPE_INPUT_NEXT_ETHERNET_INPUT);
+  return 0;
+}
+
+VLIB_INIT_FUNCTION(vxlan_gpe_init);
+