text: /*
   * 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.
   */
  #include "map.h"
  
  #include <vnet/ip/ip_frag.h>
  #include <vnet/ip/ip4_to_ip6.h>
  #include <vnet/ip/ip6_to_ip4.h>
  
  enum ip6_map_next_e
  {
    IP6_MAP_NEXT_IP4_LOOKUP,
  #ifdef MAP_SKIP_IP6_LOOKUP
    IP6_MAP_NEXT_IP4_REWRITE,
  #endif
    IP6_MAP_NEXT_IP6_REASS,
    IP6_MAP_NEXT_IP4_REASS,
    IP6_MAP_NEXT_IP4_FRAGMENT,
    IP6_MAP_NEXT_IP6_ICMP_RELAY,
    IP6_MAP_NEXT_IP6_LOCAL,
    IP6_MAP_NEXT_DROP,
    IP6_MAP_NEXT_ICMP,
    IP6_MAP_N_NEXT,
  };
  
  enum ip6_map_ip6_reass_next_e
  {
    IP6_MAP_IP6_REASS_NEXT_IP6_MAP,
    IP6_MAP_IP6_REASS_NEXT_DROP,
    IP6_MAP_IP6_REASS_N_NEXT,
  };
  
  enum ip6_map_ip4_reass_next_e
  {
    IP6_MAP_IP4_REASS_NEXT_IP4_LOOKUP,
    IP6_MAP_IP4_REASS_NEXT_IP4_FRAGMENT,
    IP6_MAP_IP4_REASS_NEXT_DROP,
    IP6_MAP_IP4_REASS_N_NEXT,
  };
  
  enum ip6_icmp_relay_next_e
  {
    IP6_ICMP_RELAY_NEXT_IP4_LOOKUP,
    IP6_ICMP_RELAY_NEXT_DROP,
    IP6_ICMP_RELAY_N_NEXT,
  };
  
  vlib_node_registration_t ip6_map_ip4_reass_node;
  vlib_node_registration_t ip6_map_ip6_reass_node;
  static vlib_node_registration_t ip6_map_icmp_relay_node;
  
  typedef struct
  {
    u32 map_domain_index;
    u16 port;
    u8 cached;
  } map_ip6_map_ip4_reass_trace_t;
  
  u8 *
  format_ip6_map_ip4_reass_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 *);
    map_ip6_map_ip4_reass_trace_t *t =
      va_arg (*args, map_ip6_map_ip4_reass_trace_t *);
    return format (s, "MAP domain index: %d L4 port: %u Status: %s",
  		 t->map_domain_index, t->port,
  		 t->cached ? "cached" : "forwarded");
  }
  
  typedef struct
  {
    u16 offset;
    u16 frag_len;
    u8 out;
  } map_ip6_map_ip6_reass_trace_t;
  
  u8 *
  format_ip6_map_ip6_reass_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 *);
    map_ip6_map_ip6_reass_trace_t *t =
      va_arg (*args, map_ip6_map_ip6_reass_trace_t *);
    return format (s, "Offset: %d Fragment length: %d Status: %s", t->offset,
  		 t->frag_len, t->out ? "out" : "in");
  }
  
  /*
   * ip6_map_sec_check
   */
  static_always_inline bool
  ip6_map_sec_check (map_domain_t * d, u16 port, ip4_header_t * ip4,
  		   ip6_header_t * ip6)
  {
    u16 sp4 = clib_net_to_host_u16 (port);
    u32 sa4 = clib_net_to_host_u32 (ip4->src_address.as_u32);
    u64 sal6 = map_get_pfx (d, sa4, sp4);
    u64 sar6 = map_get_sfx (d, sa4, sp4);
  
    if (PREDICT_FALSE
        (sal6 != clib_net_to_host_u64 (ip6->src_address.as_u64[0])
         || sar6 != clib_net_to_host_u64 (ip6->src_address.as_u64[1])))
      return (false);
    return (true);
  }
  
  static_always_inline void
  ip6_map_security_check (map_domain_t * d, ip4_header_t * ip4,
  			ip6_header_t * ip6, u32 * next, u8 * error)
  {
    map_main_t *mm = &map_main;
    if (d->ea_bits_len || d->rules)
      {
        if (d->psid_length > 0)
  	{
  	  if (!ip4_is_fragment (ip4))
  	    {
  	      u16 port = ip4_get_port (ip4, 1);
  	      if (port)
  		{
  		  if (mm->sec_check)
  		    *error =
  		      ip6_map_sec_check (d, port, ip4,
  					 ip6) ? MAP_ERROR_NONE :
  		      MAP_ERROR_DECAP_SEC_CHECK;
  		}
  	      else
  		{
  		  *error = MAP_ERROR_BAD_PROTOCOL;
  		}
  	    }
  	  else
  	    {
  	      *next = mm->sec_check_frag ? IP6_MAP_NEXT_IP4_REASS : *next;
  	    }
  	}
      }
  }
  
  static_always_inline bool
  ip6_map_ip4_lookup_bypass (vlib_buffer_t * p0, ip4_header_t * ip)
  {
  #ifdef MAP_SKIP_IP6_LOOKUP
    if (FIB_NODE_INDEX_INVALID != pre_resolved[FIB_PROTOCOL_IP4].fei)
      {
        vnet_buffer (p0)->ip.adj_index[VLIB_TX] =
  	pre_resolved[FIB_PROTOCOL_IP4].dpo.dpoi_index;
        return (true);
      }
  #endif
    return (false);
  }
  
  /*
   * ip6_map
   */
  static uword
  ip6_map (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, ip6_map_node.index);
    map_main_t *mm = &map_main;
    vlib_combined_counter_main_t *cm = mm->domain_counters;
    u32 thread_index = vm->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);
  
        /* Dual loop */
        while (n_left_from >= 4 && n_left_to_next >= 2)
  	{
  	  u32 pi0, pi1;
  	  vlib_buffer_t *p0, *p1;
  	  u8 error0 = MAP_ERROR_NONE;
  	  u8 error1 = MAP_ERROR_NONE;
  	  map_domain_t *d0 = 0, *d1 = 0;
  	  ip4_header_t *ip40, *ip41;
  	  ip6_header_t *ip60, *ip61;
  	  u16 port0 = 0, port1 = 0;
  	  u32 map_domain_index0 = ~0, map_domain_index1 = ~0;
  	  u32 next0 = IP6_MAP_NEXT_IP4_LOOKUP;
  	  u32 next1 = IP6_MAP_NEXT_IP4_LOOKUP;
  
  	  /* Prefetch next iteration. */
  	  {
  	    vlib_buffer_t *p2, *p3;
  
  	    p2 = vlib_get_buffer (vm, from[2]);
  	    p3 = vlib_get_buffer (vm, from[3]);
  
  	    vlib_prefetch_buffer_header (p2, LOAD);
  	    vlib_prefetch_buffer_header (p3, LOAD);
  
  	    /* IPv6 + IPv4 header + 8 bytes of ULP */
  	    CLIB_PREFETCH (p2->data, 68, LOAD);
  	    CLIB_PREFETCH (p3->data, 68, LOAD);
  	  }
  
  	  pi0 = to_next[0] = from[0];
  	  pi1 = to_next[1] = from[1];
  	  from += 2;
  	  n_left_from -= 2;
  	  to_next += 2;
  	  n_left_to_next -= 2;
  
  	  p0 = vlib_get_buffer (vm, pi0);
  	  p1 = vlib_get_buffer (vm, pi1);
  	  ip60 = vlib_buffer_get_current (p0);
  	  ip61 = vlib_buffer_get_current (p1);
  	  vlib_buffer_advance (p0, sizeof (ip6_header_t));
  	  vlib_buffer_advance (p1, sizeof (ip6_header_t));
  	  ip40 = vlib_buffer_get_current (p0);
  	  ip41 = vlib_buffer_get_current (p1);
  
  	  /*
  	   * Encapsulated IPv4 packet
  	   *   - IPv4 fragmented -> Pass to virtual reassembly unless security check disabled
  	   *   - Lookup/Rewrite or Fragment node in case of packet > MTU
  	   * Fragmented IPv6 packet
  	   * ICMP IPv6 packet
  	   *   - Error -> Pass to ICMPv6/ICMPv4 relay
  	   *   - Info -> Pass to IPv6 local
  	   * Anything else -> drop
  	   */
  	  if (PREDICT_TRUE
  	      (ip60->protocol == IP_PROTOCOL_IP_IN_IP
  	       && clib_net_to_host_u16 (ip60->payload_length) > 20))
  	    {
  	      d0 =
  		ip6_map_get_domain (vnet_buffer (p0)->ip.adj_index[VLIB_TX],
  				    (ip4_address_t *) & ip40->
  				    src_address.as_u32, &map_domain_index0,
  				    &error0);
  	    }
  	  else if (ip60->protocol == IP_PROTOCOL_ICMP6 &&
  		   clib_net_to_host_u16 (ip60->payload_length) >
  		   sizeof (icmp46_header_t))
  	    {
  	      icmp46_header_t *icmp = (void *) (ip60 + 1);
  	      next0 = (icmp->type == ICMP6_echo_request
  		       || icmp->type ==
  		       ICMP6_echo_reply) ? IP6_MAP_NEXT_IP6_LOCAL :
  		IP6_MAP_NEXT_IP6_ICMP_RELAY;
  	    }
  	  else if (ip60->protocol == IP_PROTOCOL_IPV6_FRAGMENTATION)
  	    {
  	      next0 = IP6_MAP_NEXT_IP6_REASS;
  	    }
  	  else
  	    {
  	      error0 = MAP_ERROR_BAD_PROTOCOL;
  	    }
  	  if (PREDICT_TRUE
  	      (ip61->protocol == IP_PROTOCOL_IP_IN_IP
  	       && clib_net_to_host_u16 (ip61->payload_length) > 20))
  	    {
  	      d1 =
  		ip6_map_get_domain (vnet_buffer (p1)->ip.adj_index[VLIB_TX],
  				    (ip4_address_t *) & ip41->
  				    src_address.as_u32, &map_domain_index1,
  				    &error1);
  	    }
  	  else if (ip61->protocol == IP_PROTOCOL_ICMP6 &&
  		   clib_net_to_host_u16 (ip61->payload_length) >
  		   sizeof (icmp46_header_t))
  	    {
  	      icmp46_header_t *icmp = (void *) (ip61 + 1);
  	      next1 = (icmp->type == ICMP6_echo_request
  		       || icmp->type ==
  		       ICMP6_echo_reply) ? IP6_MAP_NEXT_IP6_LOCAL :
  		IP6_MAP_NEXT_IP6_ICMP_RELAY;
  	    }
  	  else if (ip61->protocol == IP_PROTOCOL_IPV6_FRAGMENTATION)
  	    {
  	      next1 = IP6_MAP_NEXT_IP6_REASS;
  	    }
  	  else
  	    {
  	      error1 = MAP_ERROR_BAD_PROTOCOL;
  	    }
  
  	  if (d0)
  	    {
  	      /* MAP inbound security check */
  	      ip6_map_security_check (d0, ip40, ip60, &next0, &error0);
  
  	      if (PREDICT_TRUE (error0 == MAP_ERROR_NONE &&
  				next0 == IP6_MAP_NEXT_IP4_LOOKUP))
  		{
  		  if (PREDICT_FALSE
  		      (d0->mtu
  		       && (clib_host_to_net_u16 (ip40->length) > d0->mtu)))
  		    {
  		      vnet_buffer (p0)->ip_frag.flags = 0;
  		      vnet_buffer (p0)->ip_frag.next_index =
  			IP4_FRAG_NEXT_IP4_LOOKUP;
  		      vnet_buffer (p0)->ip_frag.mtu = d0->mtu;
  		      next0 = IP6_MAP_NEXT_IP4_FRAGMENT;
  		    }
  		  else
  		    {
  		      next0 =
  			ip6_map_ip4_lookup_bypass (p0,
  						   ip40) ?
  			IP6_MAP_NEXT_IP4_REWRITE : next0;
  		    }
  		  vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_RX,
  						   thread_index,
  						   map_domain_index0, 1,
  						   clib_net_to_host_u16
  						   (ip40->length));
  		}
  	    }
  	  if (d1)
  	    {
  	      /* MAP inbound security check */
  	      ip6_map_security_check (d1, ip41, ip61, &next1, &error1);
  
  	      if (PREDICT_TRUE (error1 == MAP_ERROR_NONE &&
  				next1 == IP6_MAP_NEXT_IP4_LOOKUP))
  		{
  		  if (PREDICT_FALSE
  		      (d1->mtu
  		       && (clib_host_to_net_u16 (ip41->length) > d1->mtu)))
  		    {
  		      vnet_buffer (p1)->ip_frag.flags = 0;
  		      vnet_buffer (p1)->ip_frag.next_index =
  			IP4_FRAG_NEXT_IP4_LOOKUP;
  		      vnet_buffer (p1)->ip_frag.mtu = d1->mtu;
  		      next1 = IP6_MAP_NEXT_IP4_FRAGMENT;
  		    }
  		  else
  		    {
  		      next1 =
  			ip6_map_ip4_lookup_bypass (p1,
  						   ip41) ?
  			IP6_MAP_NEXT_IP4_REWRITE : next1;
  		    }
  		  vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_RX,
  						   thread_index,
  						   map_domain_index1, 1,
  						   clib_net_to_host_u16
  						   (ip41->length));
  		}
  	    }
  
  	  if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
  	    {
  	      map_trace_t *tr = vlib_add_trace (vm, node, p0, sizeof (*tr));
  	      tr->map_domain_index = map_domain_index0;
  	      tr->port = port0;
  	    }
  
  	  if (PREDICT_FALSE (p1->flags & VLIB_BUFFER_IS_TRACED))
  	    {
  	      map_trace_t *tr = vlib_add_trace (vm, node, p1, sizeof (*tr));
  	      tr->map_domain_index = map_domain_index1;
  	      tr->port = port1;
  	    }
  
  	  if (error0 == MAP_ERROR_DECAP_SEC_CHECK && mm->icmp6_enabled)
  	    {
  	      /* Set ICMP parameters */
  	      vlib_buffer_advance (p0, -sizeof (ip6_header_t));
  	      icmp6_error_set_vnet_buffer (p0, ICMP6_destination_unreachable,
  					   ICMP6_destination_unreachable_source_address_failed_policy,
  					   0);
  	      next0 = IP6_MAP_NEXT_ICMP;
  	    }
  	  else
  	    {
  	      next0 = (error0 == MAP_ERROR_NONE) ? next0 : IP6_MAP_NEXT_DROP;
  	    }
  
  	  if (error1 == MAP_ERROR_DECAP_SEC_CHECK && mm->icmp6_enabled)
  	    {
  	      /* Set ICMP parameters */
  	      vlib_buffer_advance (p1, -sizeof (ip6_header_t));
  	      icmp6_error_set_vnet_buffer (p1, ICMP6_destination_unreachable,
  					   ICMP6_destination_unreachable_source_address_failed_policy,
  					   0);
  	      next1 = IP6_MAP_NEXT_ICMP;
  	    }
  	  else
  	    {
  	      next1 = (error1 == MAP_ERROR_NONE) ? next1 : IP6_MAP_NEXT_DROP;
  	    }
  
  	  /* Reset packet */
  	  if (next0 == IP6_MAP_NEXT_IP6_LOCAL)
  	    vlib_buffer_advance (p0, -sizeof (ip6_header_t));
  	  if (next1 == IP6_MAP_NEXT_IP6_LOCAL)
  	    vlib_buffer_advance (p1, -sizeof (ip6_header_t));
  
  	  p0->error = error_node->errors[error0];
  	  p1->error = error_node->errors[error1];
  	  vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
  					   n_left_to_next, pi0, pi1, next0,
  					   next1);
  	}
  
        /* Single loop */
        while (n_left_from > 0 && n_left_to_next > 0)
  	{
  	  u32 pi0;
  	  vlib_buffer_t *p0;
  	  u8 error0 = MAP_ERROR_NONE;
  	  map_domain_t *d0 = 0;
  	  ip4_header_t *ip40;
  	  ip6_header_t *ip60;
  	  i32 port0 = 0;
  	  u32 map_domain_index0 = ~0;
  	  u32 next0 = IP6_MAP_NEXT_IP4_LOOKUP;
  
  	  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);
  	  ip60 = vlib_buffer_get_current (p0);
  	  vlib_buffer_advance (p0, sizeof (ip6_header_t));
  	  ip40 = vlib_buffer_get_current (p0);
  
  	  /*
  	   * Encapsulated IPv4 packet
  	   *   - IPv4 fragmented -> Pass to virtual reassembly unless security check disabled
  	   *   - Lookup/Rewrite or Fragment node in case of packet > MTU
  	   * Fragmented IPv6 packet
  	   * ICMP IPv6 packet
  	   *   - Error -> Pass to ICMPv6/ICMPv4 relay
  	   *   - Info -> Pass to IPv6 local
  	   * Anything else -> drop
  	   */
  	  if (PREDICT_TRUE
  	      (ip60->protocol == IP_PROTOCOL_IP_IN_IP
  	       && clib_net_to_host_u16 (ip60->payload_length) > 20))
  	    {
  	      d0 =
  		ip6_map_get_domain (vnet_buffer (p0)->ip.adj_index[VLIB_TX],
  				    (ip4_address_t *) & ip40->
  				    src_address.as_u32, &map_domain_index0,
  				    &error0);
  	    }
  	  else if (ip60->protocol == IP_PROTOCOL_ICMP6 &&
  		   clib_net_to_host_u16 (ip60->payload_length) >
  		   sizeof (icmp46_header_t))
  	    {
  	      icmp46_header_t *icmp = (void *) (ip60 + 1);
  	      next0 = (icmp->type == ICMP6_echo_request
  		       || icmp->type ==
  		       ICMP6_echo_reply) ? IP6_MAP_NEXT_IP6_LOCAL :
  		IP6_MAP_NEXT_IP6_ICMP_RELAY;
  	    }
  	  else if (ip60->protocol == IP_PROTOCOL_IPV6_FRAGMENTATION &&
  		   (((ip6_frag_hdr_t *) (ip60 + 1))->next_hdr ==
  		    IP_PROTOCOL_IP_IN_IP))
  	    {
  	      next0 = IP6_MAP_NEXT_IP6_REASS;
  	    }
  	  else
  	    {
  	      error0 = MAP_ERROR_BAD_PROTOCOL;
  	    }
  
  	  if (d0)
  	    {
  	      /* MAP inbound security check */
  	      ip6_map_security_check (d0, ip40, ip60, &next0, &error0);
  
  	      if (PREDICT_TRUE (error0 == MAP_ERROR_NONE &&
  				next0 == IP6_MAP_NEXT_IP4_LOOKUP))
  		{
  		  if (PREDICT_FALSE
  		      (d0->mtu
  		       && (clib_host_to_net_u16 (ip40->length) > d0->mtu)))
  		    {
  		      vnet_buffer (p0)->ip_frag.flags = 0;
  		      vnet_buffer (p0)->ip_frag.next_index =
  			IP4_FRAG_NEXT_IP4_LOOKUP;
  		      vnet_buffer (p0)->ip_frag.mtu = d0->mtu;
  		      next0 = IP6_MAP_NEXT_IP4_FRAGMENT;
  		    }
  		  else
  		    {
  		      next0 =
  			ip6_map_ip4_lookup_bypass (p0,
  						   ip40) ?
  			IP6_MAP_NEXT_IP4_REWRITE : next0;
  		    }
  		  vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_RX,
  						   thread_index,
  						   map_domain_index0, 1,
  						   clib_net_to_host_u16
  						   (ip40->length));
  		}
  	    }
  
  	  if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
  	    {
  	      map_trace_t *tr = vlib_add_trace (vm, node, p0, sizeof (*tr));
  	      tr->map_domain_index = map_domain_index0;
  	      tr->port = (u16) port0;
  	    }
  
  	  if (mm->icmp6_enabled &&
  	      (error0 == MAP_ERROR_DECAP_SEC_CHECK
  	       || error0 == MAP_ERROR_NO_DOMAIN))
  	    {
  	      /* Set ICMP parameters */
  	      vlib_buffer_advance (p0, -sizeof (ip6_header_t));
  	      icmp6_error_set_vnet_buffer (p0, ICMP6_destination_unreachable,
  					   ICMP6_destination_unreachable_source_address_failed_policy,
  					   0);
  	      next0 = IP6_MAP_NEXT_ICMP;
  	    }
  	  else
  	    {
  	      next0 = (error0 == MAP_ERROR_NONE) ? next0 : IP6_MAP_NEXT_DROP;
  	    }
  
  	  /* Reset packet */
  	  if (next0 == IP6_MAP_NEXT_IP6_LOCAL)
  	    vlib_buffer_advance (p0, -sizeof (ip6_header_t));
  
  	  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_always_inline void
  ip6_map_ip6_reass_prepare (vlib_main_t * vm, vlib_node_runtime_t * node,
  			   map_ip6_reass_t * r, u32 ** fragments_ready,
  			   u32 ** fragments_to_drop)
  {
    ip4_header_t *ip40;
    ip6_header_t *ip60;
    ip6_frag_hdr_t *frag0;
    vlib_buffer_t *p0;
  
    if (!r->ip4_header.ip_version_and_header_length)
      return;
  
    //The IP header is here, we need to check for packets
    //that can be forwarded
    int i;
    for (i = 0; i < MAP_IP6_REASS_MAX_FRAGMENTS_PER_REASSEMBLY; i++)
      {
        if (r->fragments[i].pi == ~0 ||
  	  ((!r->fragments[i].next_data_len)
  	   && (r->fragments[i].next_data_offset != (0xffff))))
  	continue;
  
        p0 = vlib_get_buffer (vm, r->fragments[i].pi);
        ip60 = vlib_buffer_get_current (p0);
        frag0 = (ip6_frag_hdr_t *) (ip60 + 1);
        ip40 = (ip4_header_t *) (frag0 + 1);
  
        if (ip6_frag_hdr_offset (frag0))
  	{
  	  //Not first fragment, add the IPv4 header
  	  clib_memcpy_fast (ip40, &r->ip4_header, 20);
  	}
  
  #ifdef MAP_IP6_REASS_COUNT_BYTES
        r->forwarded +=
  	clib_net_to_host_u16 (ip60->payload_length) - sizeof (*frag0);
  #endif
  
        if (ip6_frag_hdr_more (frag0))
  	{
  	  //Not last fragment, we copy end of next
  	  clib_memcpy_fast (u8_ptr_add (ip60, p0->current_length),
  			    r->fragments[i].next_data, 20);
  	  p0->current_length += 20;
  	  ip60->payload_length = u16_net_add (ip60->payload_length, 20);
  	}
  
        if (!ip4_is_fragment (ip40))
  	{
  	  ip40->fragment_id = frag_id_6to4 (frag0->identification);
  	  ip40->flags_and_fragment_offset =
  	    clib_host_to_net_u16 (ip6_frag_hdr_offset (frag0));
  	}
        else
  	{
  	  ip40->flags_and_fragment_offset =
  	    clib_host_to_net_u16 (ip4_get_fragment_offset (ip40) +
  				  ip6_frag_hdr_offset (frag0));
  	}
  
        if (ip6_frag_hdr_more (frag0))
  	ip40->flags_and_fragment_offset |=
  	  clib_host_to_net_u16 (IP4_HEADER_FLAG_MORE_FRAGMENTS);
  
        ip40->length =
  	clib_host_to_net_u16 (p0->current_length - sizeof (*ip60) -
  			      sizeof (*frag0));
        ip40->checksum = ip4_header_checksum (ip40);
  
        if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
  	{
  	  map_ip6_map_ip6_reass_trace_t *tr =
  	    vlib_add_trace (vm, node, p0, sizeof (*tr));
  	  tr->offset = ip4_get_fragment_offset (ip40);
  	  tr->frag_len = clib_net_to_host_u16 (ip40->length) - sizeof (*ip40);
  	  tr->out = 1;
  	}
  
        vec_add1 (*fragments_ready, r->fragments[i].pi);
        r->fragments[i].pi = ~0;
        r->fragments[i].next_data_len = 0;
        r->fragments[i].next_data_offset = 0;
        map_main.ip6_reass_buffered_counter--;
  
        //TODO: Best solution would be that ip6_map handles extension headers
        // and ignores atomic fragment. But in the meantime, let's just copy the header.
  
        u8 protocol = frag0->next_hdr;
        memmove (u8_ptr_add (ip40, -sizeof (*ip60)), ip60, sizeof (*ip60));
        ((ip6_header_t *) u8_ptr_add (ip40, -sizeof (*ip60)))->protocol =
  	protocol;
        vlib_buffer_advance (p0, sizeof (*frag0));
      }
  }
  
  void
  map_ip6_drop_pi (u32 pi)
  {
    vlib_main_t *vm = vlib_get_main ();
    vlib_node_runtime_t *n =
      vlib_node_get_runtime (vm, ip6_map_ip6_reass_node.index);
    vlib_set_next_frame_buffer (vm, n, IP6_MAP_IP6_REASS_NEXT_DROP, pi);
  }
  
  void
  map_ip4_drop_pi (u32 pi)
  {
    vlib_main_t *vm = vlib_get_main ();
    vlib_node_runtime_t *n =
      vlib_node_get_runtime (vm, ip6_map_ip4_reass_node.index);
    vlib_set_next_frame_buffer (vm, n, IP6_MAP_IP4_REASS_NEXT_DROP, pi);
  }
  
  /*
   * ip6_reass
   * TODO: We should count the number of successfully
   * transmitted fragment bytes and compare that to the last fragment
   * offset such that we can free the reassembly structure when all fragments
   * have been forwarded.
   */
  static uword
  ip6_map_ip6_reass (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, ip6_map_ip6_reass_node.index);
    u32 *fragments_to_drop = NULL;
    u32 *fragments_ready = NULL;
  
    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 = MAP_ERROR_NONE;
  	  ip6_header_t *ip60;
  	  ip6_frag_hdr_t *frag0;
  	  u16 offset;
  	  u16 next_offset;
  	  u16 frag_len;
  
  	  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);
  	  ip60 = vlib_buffer_get_current (p0);
  	  frag0 = (ip6_frag_hdr_t *) (ip60 + 1);
  	  offset =
  	    clib_host_to_net_u16 (frag0->fragment_offset_and_more) & (~7);
  	  frag_len =
  	    clib_net_to_host_u16 (ip60->payload_length) - sizeof (*frag0);
  	  next_offset =
  	    ip6_frag_hdr_more (frag0) ? (offset + frag_len) : (0xffff);
  
  	  //FIXME: Support other extension headers, maybe
  
  	  if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
  	    {
  	      map_ip6_map_ip6_reass_trace_t *tr =
  		vlib_add_trace (vm, node, p0, sizeof (*tr));
  	      tr->offset = offset;
  	      tr->frag_len = frag_len;
  	      tr->out = 0;
  	    }
  
  	  map_ip6_reass_lock ();
  	  map_ip6_reass_t *r =
  	    map_ip6_reass_get (&ip60->src_address, &ip60->dst_address,
  			       frag0->identification, frag0->next_hdr,
  			       &fragments_to_drop);
  	  //FIXME: Use better error codes
  	  if (PREDICT_FALSE (!r))
  	    {
  	      // Could not create a caching entry
  	      error0 = MAP_ERROR_FRAGMENT_MEMORY;
  	    }
  	  else if (PREDICT_FALSE ((frag_len <= 20 &&
  				   (ip6_frag_hdr_more (frag0) || (!offset)))))
  	    {
  	      //Very small fragment are restricted to the last one and
  	      //can't be the first one
  	      error0 = MAP_ERROR_FRAGMENT_MALFORMED;
  	    }
  	  else
  	    if (map_ip6_reass_add_fragment
  		(r, pi0, offset, next_offset, (u8 *) (frag0 + 1), frag_len))
  	    {
  	      map_ip6_reass_free (r, &fragments_to_drop);
  	      error0 = MAP_ERROR_FRAGMENT_MEMORY;
  	    }
  	  else
  	    {
  #ifdef MAP_IP6_REASS_COUNT_BYTES
  	      if (!ip6_frag_hdr_more (frag0))
  		r->expected_total = offset + frag_len;
  #endif
  	      ip6_map_ip6_reass_prepare (vm, node, r, &fragments_ready,
  					 &fragments_to_drop);
  #ifdef MAP_IP6_REASS_COUNT_BYTES
  	      if (r->forwarded >= r->expected_total)
  		map_ip6_reass_free (r, &fragments_to_drop);
  #endif
  	    }
  	  map_ip6_reass_unlock ();
  
  	  if (error0 == MAP_ERROR_NONE)
  	    {
  	      if (frag_len > 20)
  		{
  		  //Dequeue the packet
  		  n_left_to_next++;
  		  to_next--;
  		}
  	      else
  		{
  		  //All data from that packet was copied no need to keep it, but this is not an error
  		  p0->error = error_node->errors[MAP_ERROR_NONE];
  		  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
  						   to_next, n_left_to_next,
  						   pi0,
  						   IP6_MAP_IP6_REASS_NEXT_DROP);
  		}
  	    }
  	  else
  	    {
  	      p0->error = error_node->errors[error0];
  	      vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
  					       n_left_to_next, pi0,
  					       IP6_MAP_IP6_REASS_NEXT_DROP);
  	    }
  	}
        vlib_put_next_frame (vm, node, next_index, n_left_to_next);
      }
  
    map_send_all_to_node (vm, fragments_ready, node,
  			&error_node->errors[MAP_ERROR_NONE],
  			IP6_MAP_IP6_REASS_NEXT_IP6_MAP);
    map_send_all_to_node (vm, fragments_to_drop, node,
  			&error_node->errors[MAP_ERROR_FRAGMENT_DROPPED],
  			IP6_MAP_IP6_REASS_NEXT_DROP);
  
    vec_free (fragments_to_drop);
    vec_free (fragments_ready);
    return frame->n_vectors;
  }
  
  /*
   * ip6_ip4_virt_reass
   */
  static uword
  ip6_map_ip4_reass (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, ip6_map_ip4_reass_node.index);
    map_main_t *mm = &map_main;
    vlib_combined_counter_main_t *cm = mm->domain_counters;
    u32 thread_index = vm->thread_index;
    u32 *fragments_to_drop = NULL;
    u32 *fragments_to_loopback = NULL;
  
    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 = MAP_ERROR_NONE;
  	  map_domain_t *d0;
  	  ip4_header_t *ip40;
  	  ip6_header_t *ip60;
  	  i32 port0 = 0;
  	  u32 map_domain_index0 = ~0;
  	  u32 next0 = IP6_MAP_IP4_REASS_NEXT_IP4_LOOKUP;
  	  u8 cached = 0;
  
  	  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);
  	  ip60 = ((ip6_header_t *) ip40) - 1;
  
  	  d0 =
  	    ip6_map_get_domain (vnet_buffer (p0)->ip.adj_index[VLIB_TX],
  				(ip4_address_t *) & ip40->src_address.as_u32,
  				&map_domain_index0, &error0);
  
  	  map_ip4_reass_lock ();
  	  //This node only deals with fragmented ip4
  	  map_ip4_reass_t *r = map_ip4_reass_get (ip40->src_address.as_u32,
  						  ip40->dst_address.as_u32,
  						  ip40->fragment_id,
  						  ip40->protocol,
  						  &fragments_to_drop);
  	  if (PREDICT_FALSE (!r))
  	    {
  	      // Could not create a caching entry
  	      error0 = MAP_ERROR_FRAGMENT_MEMORY;
  	    }
  	  else if (PREDICT_TRUE (ip4_get_fragment_offset (ip40)))
  	    {
  	      // This is a fragment
  	      if (r->port >= 0)
  		{
  		  // We know the port already
  		  port0 = r->port;
  		}
  	      else if (map_ip4_reass_add_fragment (r, pi0))
  		{
  		  // Not enough space for caching
  		  error0 = MAP_ERROR_FRAGMENT_MEMORY;
  		  map_ip4_reass_free (r, &fragments_to_drop);
  		}
  	      else
  		{
  		  cached = 1;
  		}
  	    }
  	  else if ((port0 = ip4_get_port (ip40, 1)) == 0)
  	    {
  	      // Could not find port from first fragment. Stop reassembling.
  	      error0 = MAP_ERROR_BAD_PROTOCOL;
  	      port0 = 0;
  	      map_ip4_reass_free (r, &fragments_to_drop);
  	    }
  	  else
  	    {
  	      // Found port. Remember it and loopback saved fragments
  	      r->port = port0;
  	      map_ip4_reass_get_fragments (r, &fragments_to_loopback);
  	    }
  
  #ifdef MAP_IP4_REASS_COUNT_BYTES
  	  if (!cached && r)
  	    {
  	      r->forwarded += clib_host_to_net_u16 (ip40->length) - 20;
  	      if (!ip4_get_fragment_more (ip40))
  		r->expected_total =
  		  ip4_get_fragment_offset (ip40) * 8 +
  		  clib_host_to_net_u16 (ip40->length) - 20;
  	      if (r->forwarded >= r->expected_total)
  		map_ip4_reass_free (r, &fragments_to_drop);
  	    }
  #endif
  
  	  map_ip4_reass_unlock ();
  
  	  if (PREDICT_TRUE (error0 == MAP_ERROR_NONE))
  	    error0 =
  	      ip6_map_sec_check (d0, port0, ip40,
  				 ip60) ? MAP_ERROR_NONE :
  	      MAP_ERROR_DECAP_SEC_CHECK;
  
  	  if (PREDICT_FALSE
  	      (d0->mtu && (clib_host_to_net_u16 (ip40->length) > d0->mtu)
  	       && error0 == MAP_ERROR_NONE && !cached))
  	    {
  	      vnet_buffer (p0)->ip_frag.flags = 0;
  	      vnet_buffer (p0)->ip_frag.next_index = IP4_FRAG_NEXT_IP4_LOOKUP;
  	      vnet_buffer (p0)->ip_frag.mtu = d0->mtu;
  	      next0 = IP6_MAP_IP4_REASS_NEXT_IP4_FRAGMENT;
  	    }
  
  	  if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
  	    {
  	      map_ip6_map_ip4_reass_trace_t *tr =
  		vlib_add_trace (vm, node, p0, sizeof (*tr));
  	      tr->map_domain_index = map_domain_index0;
  	      tr->port = port0;
  	      tr->cached = cached;
  	    }
  
  	  if (cached)
  	    {
  	      //Dequeue the packet
  	      n_left_to_next++;
  	      to_next--;
  	    }
  	  else
  	    {
  	      if (error0 == MAP_ERROR_NONE)
  		vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_RX,
  						 thread_index,
  						 map_domain_index0, 1,
  						 clib_net_to_host_u16
  						 (ip40->length));
  	      next0 =
  		(error0 ==
  		 MAP_ERROR_NONE) ? next0 : IP6_MAP_IP4_REASS_NEXT_DROP;
  	      p0->error = error_node->errors[error0];
  	      vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
  					       n_left_to_next, pi0, next0);
  	    }
  
  	  //Loopback when we reach the end of the inpu vector
  	  if (n_left_from == 0 && vec_len (fragments_to_loopback))
  	    {
  	      from = vlib_frame_vector_args (frame);
  	      u32 len = vec_len (fragments_to_loopback);
  	      if (len <= VLIB_FRAME_SIZE)
  		{
  		  clib_memcpy_fast (from, fragments_to_loopback,
  				    sizeof (u32) * len);
  		  n_left_from = len;
  		  vec_reset_length (fragments_to_loopback);
  		}
  	      else
  		{
  		  clib_memcpy_fast (from, fragments_to_loopback +
  				    (len - VLIB_FRAME_SIZE),
  				    sizeof (u32) * VLIB_FRAME_SIZE);
  		  n_left_from = VLIB_FRAME_SIZE;
  		  _vec_len (fragments_to_loopback) = len - VLIB_FRAME_SIZE;
  		}
  	    }
  	}
        vlib_put_next_frame (vm, node, next_index, n_left_to_next);
      }
    map_send_all_to_node (vm, fragments_to_drop, node,
  			&error_node->errors[MAP_ERROR_FRAGMENT_DROPPED],
  			IP6_MAP_IP4_REASS_NEXT_DROP);
  
    vec_free (fragments_to_drop);
    vec_free (fragments_to_loopback);
    return frame->n_vectors;
  }
  
  /*
   * ip6_icmp_relay
   */
  static uword
  ip6_map_icmp_relay (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, ip6_map_icmp_relay_node.index);
    map_main_t *mm = &map_main;
    u32 thread_index = vm->thread_index;
    u16 *fragment_ids, *fid;
  
    from = vlib_frame_vector_args (frame);
    n_left_from = frame->n_vectors;
    next_index = node->cached_next_index;
  
    /* Get random fragment IDs for replies. */
    fid = fragment_ids =
      clib_random_buffer_get_data (&vm->random_buffer,
  				 n_left_from * sizeof (fragment_ids[0]));
  
    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 = MAP_ERROR_NONE;
  	  ip6_header_t *ip60;
  	  u32 next0 = IP6_ICMP_RELAY_NEXT_IP4_LOOKUP;
  	  u32 mtu;
  
  	  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);
  	  ip60 = vlib_buffer_get_current (p0);
  	  u16 tlen = clib_net_to_host_u16 (ip60->payload_length);
  
  	  /*
  	   * In:
  	   *  IPv6 header           (40)
  	   *  ICMPv6 header          (8)
  	   *  IPv6 header           (40)
  	   *  Original IPv4 header / packet
  	   * Out:
  	   *  New IPv4 header
  	   *  New ICMP header
  	   *  Original IPv4 header / packet
  	   */
  
  	  /* Need at least ICMP(8) + IPv6(40) + IPv4(20) + L4 header(8) */
  	  if (tlen < 76)
  	    {
  	      error0 = MAP_ERROR_ICMP_RELAY;
  	      goto error;
  	    }
  
  	  icmp46_header_t *icmp60 = (icmp46_header_t *) (ip60 + 1);
  	  ip6_header_t *inner_ip60 = (ip6_header_t *) (icmp60 + 2);
  
  	  if (inner_ip60->protocol != IP_PROTOCOL_IP_IN_IP)
  	    {
  	      error0 = MAP_ERROR_ICMP_RELAY;
  	      goto error;
  	    }
  
  	  ip4_header_t *inner_ip40 = (ip4_header_t *) (inner_ip60 + 1);
  	  vlib_buffer_advance (p0, 60);	/* sizeof ( IPv6 + ICMP + IPv6 - IPv4 - ICMP ) */
  	  ip4_header_t *new_ip40 = vlib_buffer_get_current (p0);
  	  icmp46_header_t *new_icmp40 = (icmp46_header_t *) (new_ip40 + 1);
  
  	  /*
  	   * Relay according to RFC2473, section 8.3
  	   */
  	  switch (icmp60->type)
  	    {
  	    case ICMP6_destination_unreachable:
  	    case ICMP6_time_exceeded:
  	    case ICMP6_parameter_problem:
  	      /* Type 3 - destination unreachable, Code 1 - host unreachable */
  	      new_icmp40->type = ICMP4_destination_unreachable;
  	      new_icmp40->code =
  		ICMP4_destination_unreachable_destination_unreachable_host;
  	      break;
  
  	    case ICMP6_packet_too_big:
  	      /* Type 3 - destination unreachable, Code 4 - packet too big */
  	      /* Potential TODO: Adjust domain tunnel MTU based on the value received here */
  	      mtu = clib_net_to_host_u32 (*((u32 *) (icmp60 + 1)));
  
  	      /* Check DF flag */
  	      if (!
  		  (inner_ip40->flags_and_fragment_offset &
  		   clib_host_to_net_u16 (IP4_HEADER_FLAG_DONT_FRAGMENT)))
  		{
  		  error0 = MAP_ERROR_ICMP_RELAY;
  		  goto error;
  		}
  
  	      new_icmp40->type = ICMP4_destination_unreachable;
  	      new_icmp40->code =
  		ICMP4_destination_unreachable_fragmentation_needed_and_dont_fragment_set;
  	      *((u32 *) (new_icmp40 + 1)) =
  		clib_host_to_net_u32 (mtu < 1280 ? 1280 : mtu);
  	      break;
  
  	    default:
  	      error0 = MAP_ERROR_ICMP_RELAY;
  	      break;
  	    }
  
  	  /*
  	   * Ensure the total ICMP packet is no longer than 576 bytes (RFC1812)
  	   */
  	  new_ip40->ip_version_and_header_length = 0x45;
  	  new_ip40->tos = 0;
  	  u16 nlen = (tlen - 20) > 576 ? 576 : tlen - 20;
  	  new_ip40->length = clib_host_to_net_u16 (nlen);
  	  new_ip40->fragment_id = fid[0];
  	  fid++;
  	  new_ip40->ttl = 64;
  	  new_ip40->protocol = IP_PROTOCOL_ICMP;
  	  new_ip40->src_address = mm->icmp4_src_address;
  	  new_ip40->dst_address = inner_ip40->src_address;
  	  new_ip40->checksum = ip4_header_checksum (new_ip40);
  
  	  new_icmp40->checksum = 0;
  	  ip_csum_t sum = ip_incremental_checksum (0, new_icmp40, nlen - 20);
  	  new_icmp40->checksum = ~ip_csum_fold (sum);
  
  	  vlib_increment_simple_counter (&mm->icmp_relayed, thread_index, 0,
  					 1);
  
  	error:
  	  if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
  	    {
  	      map_trace_t *tr = vlib_add_trace (vm, node, p0, sizeof (*tr));
  	      tr->map_domain_index = 0;
  	      tr->port = 0;
  	    }
  
  	  next0 =
  	    (error0 == MAP_ERROR_NONE) ? next0 : IP6_ICMP_RELAY_NEXT_DROP;
  	  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 *map_error_strings[] = {
  #define _(sym,string) string,
    foreach_map_error
  #undef _
  };
  
  /* *INDENT-OFF* */
  VLIB_REGISTER_NODE(ip6_map_node) = {
    .function = ip6_map,
    .name = "ip6-map",
    .vector_size = sizeof(u32),
    .format_trace = format_map_trace,
    .type = VLIB_NODE_TYPE_INTERNAL,
  
    .n_errors = MAP_N_ERROR,
    .error_strings = map_error_strings,
  
    .n_next_nodes = IP6_MAP_N_NEXT,
    .next_nodes = {
      [IP6_MAP_NEXT_IP4_LOOKUP] = "ip4-lookup",
  #ifdef MAP_SKIP_IP6_LOOKUP
      [IP6_MAP_NEXT_IP4_REWRITE] = "ip4-load-balance",
  #endif
      [IP6_MAP_NEXT_IP6_REASS] = "ip6-map-ip6-reass",
      [IP6_MAP_NEXT_IP4_REASS] = "ip6-map-ip4-reass",
      [IP6_MAP_NEXT_IP4_FRAGMENT] = "ip4-frag",
      [IP6_MAP_NEXT_IP6_ICMP_RELAY] = "ip6-map-icmp-relay",
      [IP6_MAP_NEXT_IP6_LOCAL] = "ip6-local",
      [IP6_MAP_NEXT_DROP] = "error-drop",
      [IP6_MAP_NEXT_ICMP] = "ip6-icmp-error",
    },
  };
  /* *INDENT-ON* */
  
  /* *INDENT-OFF* */
  VLIB_REGISTER_NODE(ip6_map_ip6_reass_node) = {
    .function = ip6_map_ip6_reass,
    .name = "ip6-map-ip6-reass",
    .vector_size = sizeof(u32),
    .format_trace = format_ip6_map_ip6_reass_trace,
    .type = VLIB_NODE_TYPE_INTERNAL,
    .n_errors = MAP_N_ERROR,
    .error_strings = map_error_strings,
    .n_next_nodes = IP6_MAP_IP6_REASS_N_NEXT,
    .next_nodes = {
      [IP6_MAP_IP6_REASS_NEXT_IP6_MAP] = "ip6-map",
      [IP6_MAP_IP6_REASS_NEXT_DROP] = "error-drop",
    },
  };
  /* *INDENT-ON* */
  
  /* *INDENT-OFF* */
  VLIB_REGISTER_NODE(ip6_map_ip4_reass_node) = {
    .function = ip6_map_ip4_reass,
    .name = "ip6-map-ip4-reass",
    .vector_size = sizeof(u32),
    .format_trace = format_ip6_map_ip4_reass_trace,
    .type = VLIB_NODE_TYPE_INTERNAL,
    .n_errors = MAP_N_ERROR,
    .error_strings = map_error_strings,
    .n_next_nodes = IP6_MAP_IP4_REASS_N_NEXT,
    .next_nodes = {
      [IP6_MAP_IP4_REASS_NEXT_IP4_LOOKUP] = "ip4-lookup",
      [IP6_MAP_IP4_REASS_NEXT_IP4_FRAGMENT] = "ip4-frag",
      [IP6_MAP_IP4_REASS_NEXT_DROP] = "error-drop",
    },
  };
  /* *INDENT-ON* */
  
  /* *INDENT-OFF* */
  VLIB_REGISTER_NODE(ip6_map_icmp_relay_node, static) = {
    .function = ip6_map_icmp_relay,
    .name = "ip6-map-icmp-relay",
    .vector_size = sizeof(u32),
    .format_trace = format_map_trace, //FIXME
    .type = VLIB_NODE_TYPE_INTERNAL,
    .n_errors = MAP_N_ERROR,
    .error_strings = map_error_strings,
    .n_next_nodes = IP6_ICMP_RELAY_N_NEXT,
    .next_nodes = {
      [IP6_ICMP_RELAY_NEXT_IP4_LOOKUP] = "ip4-lookup",
      [IP6_ICMP_RELAY_NEXT_DROP] = "error-drop",
    },
  };
  /* *INDENT-ON* */
  
  /*
   * fd.io coding-style-patch-verification: ON
   *
   * Local Variables:
   * eval: (c-set-style "gnu")
   * End:
   */
  