Reorganize source tree to use single autotools instance

Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23
Signed-off-by: Damjan Marion <damarion@cisco.com>

1 files changed, 1517 insertions, 0 deletions

diff --git a/src/vnet/map/ip6_map_t.c b/src/vnet/map/ip6_map_t.c
new file mode 100644
index 00000000000..eb3996c2467
--- /dev/null
+++ b/src/vnet/map/ip6_map_t.c
@@ -0,0 +1,1517 @@
+/*
+ * 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 "../ip/ip_frag.h"
+
+#define IP6_MAP_T_DUAL_LOOP
+
+typedef enum
+{
+  IP6_MAPT_NEXT_MAPT_TCP_UDP,
+  IP6_MAPT_NEXT_MAPT_ICMP,
+  IP6_MAPT_NEXT_MAPT_FRAGMENTED,
+  IP6_MAPT_NEXT_DROP,
+  IP6_MAPT_N_NEXT
+} ip6_mapt_next_t;
+
+typedef enum
+{
+  IP6_MAPT_ICMP_NEXT_IP4_LOOKUP,
+  IP6_MAPT_ICMP_NEXT_IP4_FRAG,
+  IP6_MAPT_ICMP_NEXT_DROP,
+  IP6_MAPT_ICMP_N_NEXT
+} ip6_mapt_icmp_next_t;
+
+typedef enum
+{
+  IP6_MAPT_TCP_UDP_NEXT_IP4_LOOKUP,
+  IP6_MAPT_TCP_UDP_NEXT_IP4_FRAG,
+  IP6_MAPT_TCP_UDP_NEXT_DROP,
+  IP6_MAPT_TCP_UDP_N_NEXT
+} ip6_mapt_tcp_udp_next_t;
+
+typedef enum
+{
+  IP6_MAPT_FRAGMENTED_NEXT_IP4_LOOKUP,
+  IP6_MAPT_FRAGMENTED_NEXT_IP4_FRAG,
+  IP6_MAPT_FRAGMENTED_NEXT_DROP,
+  IP6_MAPT_FRAGMENTED_N_NEXT
+} ip6_mapt_fragmented_next_t;
+
+static_always_inline int
+ip6_map_fragment_cache (ip6_header_t * ip6, ip6_frag_hdr_t * frag,
+			map_domain_t * d, u16 port)
+{
+  u32 *ignore = NULL;
+  map_ip4_reass_lock ();
+  map_ip4_reass_t *r = map_ip4_reass_get (map_get_ip4 (&ip6->src_address),
+					  ip6_map_t_embedded_address (d,
+								      &ip6->
+								      dst_address),
+					  frag_id_6to4 (frag->identification),
+					  (ip6->protocol ==
+					   IP_PROTOCOL_ICMP6) ?
+					  IP_PROTOCOL_ICMP : ip6->protocol,
+					  &ignore);
+  if (r)
+    r->port = port;
+
+  map_ip4_reass_unlock ();
+  return !r;
+}
+
+/* Returns the associated port or -1 */
+static_always_inline i32
+ip6_map_fragment_get (ip6_header_t * ip6, ip6_frag_hdr_t * frag,
+		      map_domain_t * d)
+{
+  u32 *ignore = NULL;
+  map_ip4_reass_lock ();
+  map_ip4_reass_t *r = map_ip4_reass_get (map_get_ip4 (&ip6->src_address),
+					  ip6_map_t_embedded_address (d,
+								      &ip6->
+								      dst_address),
+					  frag_id_6to4 (frag->identification),
+					  (ip6->protocol ==
+					   IP_PROTOCOL_ICMP6) ?
+					  IP_PROTOCOL_ICMP : ip6->protocol,
+					  &ignore);
+  i32 ret = r ? r->port : -1;
+  map_ip4_reass_unlock ();
+  return ret;
+}
+
+static_always_inline u8
+ip6_translate_tos (const ip6_header_t * ip6)
+{
+#ifdef IP6_MAP_T_OVERRIDE_TOS
+  return IP6_MAP_T_OVERRIDE_TOS;
+#else
+  return (clib_net_to_host_u32 (ip6->ip_version_traffic_class_and_flow_label)
+	  & 0x0ff00000) >> 20;
+#endif
+}
+
+//TODO: Find right place in memory for that
+/* *INDENT-OFF* */
+static u8 icmp6_to_icmp_updater_pointer_table[] =
+  { 0, 1, ~0, ~0,
+    2, 2, 9, 8,
+    12, 12, 12, 12,
+    12, 12, 12, 12,
+    12, 12, 12, 12,
+    12, 12, 12, 12,
+    24, 24, 24, 24,
+    24, 24, 24, 24,
+    24, 24, 24, 24,
+    24, 24, 24, 24
+  };
+/* *INDENT-ON* */
+
+static_always_inline int
+ip6_icmp_to_icmp6_in_place (icmp46_header_t * icmp, u32 icmp_len,
+			    i32 * sender_port, ip6_header_t ** inner_ip6)
+{
+  *inner_ip6 = NULL;
+  switch (icmp->type)
+    {
+    case ICMP6_echo_request:
+      *sender_port = ((u16 *) icmp)[2];
+      icmp->type = ICMP4_echo_request;
+      break;
+    case ICMP6_echo_reply:
+      *sender_port = ((u16 *) icmp)[2];
+      icmp->type = ICMP4_echo_reply;
+      break;
+    case ICMP6_destination_unreachable:
+      *inner_ip6 = (ip6_header_t *) u8_ptr_add (icmp, 8);
+      *sender_port = ip6_get_port (*inner_ip6, MAP_RECEIVER, icmp_len);
+
+      switch (icmp->code)
+	{
+	case ICMP6_destination_unreachable_no_route_to_destination:	//0
+	case ICMP6_destination_unreachable_beyond_scope_of_source_address:	//2
+	case ICMP6_destination_unreachable_address_unreachable:	//3
+	  icmp->type = ICMP4_destination_unreachable;
+	  icmp->code =
+	    ICMP4_destination_unreachable_destination_unreachable_host;
+	  break;
+	case ICMP6_destination_unreachable_destination_administratively_prohibited:	//1
+	  icmp->type =
+	    ICMP4_destination_unreachable;
+	  icmp->code =
+	    ICMP4_destination_unreachable_communication_administratively_prohibited;
+	  break;
+	case ICMP6_destination_unreachable_port_unreachable:
+	  icmp->type = ICMP4_destination_unreachable;
+	  icmp->code = ICMP4_destination_unreachable_port_unreachable;
+	  break;
+	default:
+	  return -1;
+	}
+      break;
+    case ICMP6_packet_too_big:
+      *inner_ip6 = (ip6_header_t *) u8_ptr_add (icmp, 8);
+      *sender_port = ip6_get_port (*inner_ip6, MAP_RECEIVER, icmp_len);
+
+      icmp->type = ICMP4_destination_unreachable;
+      icmp->code = 4;
+      {
+	u32 advertised_mtu = clib_net_to_host_u32 (*((u32 *) (icmp + 1)));
+	advertised_mtu -= 20;
+	//FIXME: = minimum(advertised MTU-20, MTU_of_IPv4_nexthop, (MTU_of_IPv6_nexthop)-20)
+	((u16 *) (icmp))[3] = clib_host_to_net_u16 (advertised_mtu);
+      }
+      break;
+
+    case ICMP6_time_exceeded:
+      *inner_ip6 = (ip6_header_t *) u8_ptr_add (icmp, 8);
+      *sender_port = ip6_get_port (*inner_ip6, MAP_RECEIVER, icmp_len);
+
+      icmp->type = ICMP4_time_exceeded;
+      break;
+
+    case ICMP6_parameter_problem:
+      *inner_ip6 = (ip6_header_t *) u8_ptr_add (icmp, 8);
+      *sender_port = ip6_get_port (*inner_ip6, MAP_RECEIVER, icmp_len);
+
+      switch (icmp->code)
+	{
+	case ICMP6_parameter_problem_erroneous_header_field:
+	  icmp->type = ICMP4_parameter_problem;
+	  icmp->code = ICMP4_parameter_problem_pointer_indicates_error;
+	  u32 pointer = clib_net_to_host_u32 (*((u32 *) (icmp + 1)));
+	  if (pointer >= 40)
+	    return -1;
+
+	  ((u8 *) (icmp + 1))[0] =
+	    icmp6_to_icmp_updater_pointer_table[pointer];
+	  break;
+	case ICMP6_parameter_problem_unrecognized_next_header:
+	  icmp->type = ICMP4_destination_unreachable;
+	  icmp->code = ICMP4_destination_unreachable_port_unreachable;
+	  break;
+	case ICMP6_parameter_problem_unrecognized_option:
+	default:
+	  return -1;
+	}
+      break;
+    default:
+      return -1;
+      break;
+    }
+  return 0;
+}
+
+static_always_inline void
+_ip6_map_t_icmp (map_domain_t * d, vlib_buffer_t * p, u8 * error)
+{
+  ip6_header_t *ip6, *inner_ip6;
+  ip4_header_t *ip4, *inner_ip4;
+  u32 ip6_pay_len;
+  icmp46_header_t *icmp;
+  i32 sender_port;
+  ip_csum_t csum;
+  u32 ip4_sadr, inner_ip4_dadr;
+
+  ip6 = vlib_buffer_get_current (p);
+  ip6_pay_len = clib_net_to_host_u16 (ip6->payload_length);
+  icmp = (icmp46_header_t *) (ip6 + 1);
+  ASSERT (ip6_pay_len + sizeof (*ip6) <= p->current_length);
+
+  if (ip6->protocol != IP_PROTOCOL_ICMP6)
+    {
+      //No extensions headers allowed here
+      //TODO: SR header
+      *error = MAP_ERROR_MALFORMED;
+      return;
+    }
+
+  //There are no fragmented ICMP messages, so no extension header for now
+
+  if (ip6_icmp_to_icmp6_in_place
+      (icmp, ip6_pay_len, &sender_port, &inner_ip6))
+    {
+      //TODO: In case of 1:1 mapping it is not necessary to have the sender port
+      *error = MAP_ERROR_ICMP;
+      return;
+    }
+
+  if (sender_port < 0)
+    {
+      // In case of 1:1 mapping, we don't care about the port
+      if (d->ea_bits_len == 0 && d->rules)
+	{
+	  sender_port = 0;
+	}
+      else
+	{
+	  *error = MAP_ERROR_ICMP;
+	  return;
+	}
+    }
+
+  //Security check
+  //Note that this prevents an intermediate IPv6 router from answering the request
+  ip4_sadr = map_get_ip4 (&ip6->src_address);
+  if (ip6->src_address.as_u64[0] != map_get_pfx_net (d, ip4_sadr, sender_port)
+      || ip6->src_address.as_u64[1] != map_get_sfx_net (d, ip4_sadr,
+							sender_port))
+    {
+      *error = MAP_ERROR_SEC_CHECK;
+      return;
+    }
+
+  if (inner_ip6)
+    {
+      u16 *inner_L4_checksum, inner_l4_offset, inner_frag_offset,
+	inner_frag_id;
+      u8 *inner_l4, inner_protocol;
+
+      //We have two headers to translate
+      //   FROM
+      //   [   IPv6   ]<- ext ->[IC][   IPv6   ]<- ext ->[L4 header ...
+      // Handled cases:
+      //                     [   IPv6   ][IC][   IPv6   ][L4 header ...
+      //                 [   IPv6   ][IC][   IPv6   ][Fr][L4 header ...
+      //    TO
+      //                               [ IPv4][IC][ IPv4][L4 header ...
+
+      //TODO: This was already done deep in ip6_icmp_to_icmp6_in_place
+      //We shouldn't have to do it again
+      if (ip6_parse (inner_ip6, ip6_pay_len - 8,
+		     &inner_protocol, &inner_l4_offset, &inner_frag_offset))
+	{
+	  *error = MAP_ERROR_MALFORMED;
+	  return;
+	}
+
+      inner_l4 = u8_ptr_add (inner_ip6, inner_l4_offset);
+      inner_ip4 =
+	(ip4_header_t *) u8_ptr_add (inner_l4, -sizeof (*inner_ip4));
+      if (inner_frag_offset)
+	{
+	  ip6_frag_hdr_t *inner_frag =
+	    (ip6_frag_hdr_t *) u8_ptr_add (inner_ip6, inner_frag_offset);
+	  inner_frag_id = frag_id_6to4 (inner_frag->identification);
+	}
+      else
+	{
+	  inner_frag_id = 0;
+	}
+
+      //Do the translation of the inner packet
+      if (inner_protocol == IP_PROTOCOL_TCP)
+	{
+	  inner_L4_checksum = (u16 *) u8_ptr_add (inner_l4, 16);
+	}
+      else if (inner_protocol == IP_PROTOCOL_UDP)
+	{
+	  inner_L4_checksum = (u16 *) u8_ptr_add (inner_l4, 6);
+	}
+      else if (inner_protocol == IP_PROTOCOL_ICMP6)
+	{
+	  icmp46_header_t *inner_icmp = (icmp46_header_t *) inner_l4;
+	  csum = inner_icmp->checksum;
+	  csum = ip_csum_sub_even (csum, *((u16 *) inner_icmp));
+	  //It cannot be of a different type as ip6_icmp_to_icmp6_in_place succeeded
+	  inner_icmp->type = (inner_icmp->type == ICMP6_echo_request) ?
+	    ICMP4_echo_request : ICMP4_echo_reply;
+	  csum = ip_csum_add_even (csum, *((u16 *) inner_icmp));
+	  inner_icmp->checksum = ip_csum_fold (csum);
+	  inner_protocol = IP_PROTOCOL_ICMP;	//Will be copied to ip6 later
+	  inner_L4_checksum = &inner_icmp->checksum;
+	}
+      else
+	{
+	  *error = MAP_ERROR_BAD_PROTOCOL;
+	  return;
+	}
+
+      csum = *inner_L4_checksum;
+      csum = ip_csum_sub_even (csum, inner_ip6->src_address.as_u64[0]);
+      csum = ip_csum_sub_even (csum, inner_ip6->src_address.as_u64[1]);
+      csum = ip_csum_sub_even (csum, inner_ip6->dst_address.as_u64[0]);
+      csum = ip_csum_sub_even (csum, inner_ip6->dst_address.as_u64[1]);
+
+      //Sanity check of the outer destination address
+      if (ip6->dst_address.as_u64[0] != inner_ip6->src_address.as_u64[0] &&
+	  ip6->dst_address.as_u64[1] != inner_ip6->src_address.as_u64[1])
+	{
+	  *error = MAP_ERROR_SEC_CHECK;
+	  return;
+	}
+
+      //Security check of inner packet
+      inner_ip4_dadr = map_get_ip4 (&inner_ip6->dst_address);
+      if (inner_ip6->dst_address.as_u64[0] !=
+	  map_get_pfx_net (d, inner_ip4_dadr, sender_port)
+	  || inner_ip6->dst_address.as_u64[1] != map_get_sfx_net (d,
+								  inner_ip4_dadr,
+								  sender_port))
+	{
+	  *error = MAP_ERROR_SEC_CHECK;
+	  return;
+	}
+
+      inner_ip4->dst_address.as_u32 = inner_ip4_dadr;
+      inner_ip4->src_address.as_u32 =
+	ip6_map_t_embedded_address (d, &inner_ip6->src_address);
+      inner_ip4->ip_version_and_header_length =
+	IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS;
+      inner_ip4->tos = ip6_translate_tos (inner_ip6);
+      inner_ip4->length =
+	u16_net_add (inner_ip6->payload_length,
+		     sizeof (*ip4) + sizeof (*ip6) - inner_l4_offset);
+      inner_ip4->fragment_id = inner_frag_id;
+      inner_ip4->flags_and_fragment_offset =
+	clib_host_to_net_u16 (IP4_HEADER_FLAG_MORE_FRAGMENTS);
+      inner_ip4->ttl = inner_ip6->hop_limit;
+      inner_ip4->protocol = inner_protocol;
+      inner_ip4->checksum = ip4_header_checksum (inner_ip4);
+
+      if (inner_ip4->protocol == IP_PROTOCOL_ICMP)
+	{
+	  //Remove remainings of the pseudo-header in the csum
+	  csum =
+	    ip_csum_sub_even (csum, clib_host_to_net_u16 (IP_PROTOCOL_ICMP6));
+	  csum =
+	    ip_csum_sub_even (csum, inner_ip4->length - sizeof (*inner_ip4));
+	}
+      else
+	{
+	  //Update to new pseudo-header
+	  csum = ip_csum_add_even (csum, inner_ip4->src_address.as_u32);
+	  csum = ip_csum_add_even (csum, inner_ip4->dst_address.as_u32);
+	}
+      *inner_L4_checksum = ip_csum_fold (csum);
+
+      //Move up icmp header
+      ip4 = (ip4_header_t *) u8_ptr_add (inner_l4, -2 * sizeof (*ip4) - 8);
+      clib_memcpy (u8_ptr_add (inner_l4, -sizeof (*ip4) - 8), icmp, 8);
+      icmp = (icmp46_header_t *) u8_ptr_add (inner_l4, -sizeof (*ip4) - 8);
+    }
+  else
+    {
+      //Only one header to translate
+      ip4 = (ip4_header_t *) u8_ptr_add (ip6, sizeof (*ip6) - sizeof (*ip4));
+    }
+  vlib_buffer_advance (p, (u32) (((u8 *) ip4) - ((u8 *) ip6)));
+
+  ip4->dst_address.as_u32 = ip6_map_t_embedded_address (d, &ip6->dst_address);
+  ip4->src_address.as_u32 = ip4_sadr;
+  ip4->ip_version_and_header_length =
+    IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS;
+  ip4->tos = ip6_translate_tos (ip6);
+  ip4->fragment_id = 0;
+  ip4->flags_and_fragment_offset = 0;
+  ip4->ttl = ip6->hop_limit;
+  ip4->protocol = IP_PROTOCOL_ICMP;
+  //TODO fix the length depending on offset length
+  ip4->length = u16_net_add (ip6->payload_length,
+			     (inner_ip6 ==
+			      NULL) ? sizeof (*ip4) : (2 * sizeof (*ip4) -
+						       sizeof (*ip6)));
+  ip4->checksum = ip4_header_checksum (ip4);
+
+  //TODO: We could do an easy diff-checksum for echo requests/replies
+  //Recompute ICMP checksum
+  icmp->checksum = 0;
+  csum =
+    ip_incremental_checksum (0, icmp,
+			     clib_net_to_host_u16 (ip4->length) -
+			     sizeof (*ip4));
+  icmp->checksum = ~ip_csum_fold (csum);
+}
+
+static uword
+ip6_map_t_icmp (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_t_icmp_node.index);
+  from = vlib_frame_vector_args (frame);
+  n_left_from = frame->n_vectors;
+  next_index = node->cached_next_index;
+  vlib_combined_counter_main_t *cm = map_main.domain_counters;
+  u32 cpu_index = os_get_cpu_number ();
+
+  while (n_left_from > 0)
+    {
+      vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+      while (n_left_from > 0 && n_left_to_next > 0)
+	{
+	  u32 pi0;
+	  vlib_buffer_t *p0;
+	  u8 error0;
+	  ip6_mapt_icmp_next_t next0;
+	  map_domain_t *d0;
+	  u16 len0;
+
+	  pi0 = to_next[0] = from[0];
+	  from += 1;
+	  n_left_from -= 1;
+	  to_next += 1;
+	  n_left_to_next -= 1;
+	  error0 = MAP_ERROR_NONE;
+	  next0 = IP6_MAPT_ICMP_NEXT_IP4_LOOKUP;
+
+	  p0 = vlib_get_buffer (vm, pi0);
+	  len0 =
+	    clib_net_to_host_u16 (((ip6_header_t *)
+				   vlib_buffer_get_current
+				   (p0))->payload_length);
+	  d0 =
+	    pool_elt_at_index (map_main.domains,
+			       vnet_buffer (p0)->map_t.map_domain_index);
+	  _ip6_map_t_icmp (d0, p0, &error0);
+
+	  if (vnet_buffer (p0)->map_t.mtu < p0->current_length)
+	    {
+	      //Send to fragmentation node if necessary
+	      vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu;
+	      vnet_buffer (p0)->ip_frag.header_offset = 0;
+	      vnet_buffer (p0)->ip_frag.next_index = IP4_FRAG_NEXT_IP4_LOOKUP;
+	      next0 = IP6_MAPT_ICMP_NEXT_IP4_FRAG;
+	    }
+
+	  if (PREDICT_TRUE (error0 == MAP_ERROR_NONE))
+	    {
+	      vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_RX,
+					       cpu_index,
+					       vnet_buffer (p0)->
+					       map_t.map_domain_index, 1,
+					       len0);
+	    }
+	  else
+	    {
+	      next0 = IP6_MAPT_ICMP_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 uword
+ip6_map_t_fragmented (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;
+  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);
+
+#ifdef IP6_MAP_T_DUAL_LOOP
+      while (n_left_from >= 4 && n_left_to_next >= 2)
+	{
+	  u32 pi0, pi1;
+	  vlib_buffer_t *p0, *p1;
+	  ip6_header_t *ip60, *ip61;
+	  ip6_frag_hdr_t *frag0, *frag1;
+	  ip4_header_t *ip40, *ip41;
+	  u16 frag_id0, frag_offset0, frag_id1, frag_offset1;
+	  u8 frag_more0, frag_more1;
+	  u32 next0, next1;
+
+	  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;
+
+	  next0 = IP6_MAPT_TCP_UDP_NEXT_IP4_LOOKUP;
+	  next1 = IP6_MAPT_TCP_UDP_NEXT_IP4_LOOKUP;
+	  p0 = vlib_get_buffer (vm, pi0);
+	  p1 = vlib_get_buffer (vm, pi1);
+	  ip60 = vlib_buffer_get_current (p0);
+	  ip61 = vlib_buffer_get_current (p1);
+	  frag0 =
+	    (ip6_frag_hdr_t *) u8_ptr_add (ip60,
+					   vnet_buffer (p0)->map_t.
+					   v6.frag_offset);
+	  frag1 =
+	    (ip6_frag_hdr_t *) u8_ptr_add (ip61,
+					   vnet_buffer (p1)->map_t.
+					   v6.frag_offset);
+	  ip40 =
+	    (ip4_header_t *) u8_ptr_add (ip60,
+					 vnet_buffer (p0)->map_t.
+					 v6.l4_offset - sizeof (*ip40));
+	  ip41 =
+	    (ip4_header_t *) u8_ptr_add (ip61,
+					 vnet_buffer (p1)->map_t.
+					 v6.l4_offset - sizeof (*ip40));
+	  vlib_buffer_advance (p0,
+			       vnet_buffer (p0)->map_t.v6.l4_offset -
+			       sizeof (*ip40));
+	  vlib_buffer_advance (p1,
+			       vnet_buffer (p1)->map_t.v6.l4_offset -
+			       sizeof (*ip40));
+
+	  frag_id0 = frag_id_6to4 (frag0->identification);
+	  frag_id1 = frag_id_6to4 (frag1->identification);
+	  frag_more0 = ip6_frag_hdr_more (frag0);
+	  frag_more1 = ip6_frag_hdr_more (frag1);
+	  frag_offset0 = ip6_frag_hdr_offset (frag0);
+	  frag_offset1 = ip6_frag_hdr_offset (frag1);
+
+	  ip40->dst_address.as_u32 = vnet_buffer (p0)->map_t.v6.daddr;
+	  ip41->dst_address.as_u32 = vnet_buffer (p1)->map_t.v6.daddr;
+	  ip40->src_address.as_u32 = vnet_buffer (p0)->map_t.v6.saddr;
+	  ip41->src_address.as_u32 = vnet_buffer (p1)->map_t.v6.saddr;
+	  ip40->ip_version_and_header_length =
+	    IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS;
+	  ip41->ip_version_and_header_length =
+	    IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS;
+	  ip40->tos = ip6_translate_tos (ip60);
+	  ip41->tos = ip6_translate_tos (ip61);
+	  ip40->length = u16_net_add (ip60->payload_length,
+				      sizeof (*ip40) -
+				      vnet_buffer (p0)->map_t.v6.l4_offset +
+				      sizeof (*ip60));
+	  ip41->length =
+	    u16_net_add (ip61->payload_length,
+			 sizeof (*ip40) -
+			 vnet_buffer (p1)->map_t.v6.l4_offset +
+			 sizeof (*ip60));
+	  ip40->fragment_id = frag_id0;
+	  ip41->fragment_id = frag_id1;
+	  ip40->flags_and_fragment_offset =
+	    clib_host_to_net_u16 (frag_offset0 |
+				  (frag_more0 ? IP4_HEADER_FLAG_MORE_FRAGMENTS
+				   : 0));
+	  ip41->flags_and_fragment_offset =
+	    clib_host_to_net_u16 (frag_offset1 |
+				  (frag_more1 ? IP4_HEADER_FLAG_MORE_FRAGMENTS
+				   : 0));
+	  ip40->ttl = ip60->hop_limit;
+	  ip41->ttl = ip61->hop_limit;
+	  ip40->protocol =
+	    (vnet_buffer (p0)->map_t.v6.l4_protocol ==
+	     IP_PROTOCOL_ICMP6) ? IP_PROTOCOL_ICMP : vnet_buffer (p0)->
+	    map_t.v6.l4_protocol;
+	  ip41->protocol =
+	    (vnet_buffer (p1)->map_t.v6.l4_protocol ==
+	     IP_PROTOCOL_ICMP6) ? IP_PROTOCOL_ICMP : vnet_buffer (p1)->
+	    map_t.v6.l4_protocol;
+	  ip40->checksum = ip4_header_checksum (ip40);
+	  ip41->checksum = ip4_header_checksum (ip41);
+
+	  if (vnet_buffer (p0)->map_t.mtu < p0->current_length)
+	    {
+	      vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu;
+	      vnet_buffer (p0)->ip_frag.header_offset = 0;
+	      vnet_buffer (p0)->ip_frag.next_index = IP4_FRAG_NEXT_IP4_LOOKUP;
+	      next0 = IP6_MAPT_FRAGMENTED_NEXT_IP4_FRAG;
+	    }
+
+	  if (vnet_buffer (p1)->map_t.mtu < p1->current_length)
+	    {
+	      vnet_buffer (p1)->ip_frag.mtu = vnet_buffer (p1)->map_t.mtu;
+	      vnet_buffer (p1)->ip_frag.header_offset = 0;
+	      vnet_buffer (p1)->ip_frag.next_index = IP4_FRAG_NEXT_IP4_LOOKUP;
+	      next1 = IP6_MAPT_FRAGMENTED_NEXT_IP4_FRAG;
+	    }
+
+	  vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
+					   to_next, n_left_to_next, pi0, pi1,
+					   next0, next1);
+	}
+#endif
+
+      while (n_left_from > 0 && n_left_to_next > 0)
+	{
+	  u32 pi0;
+	  vlib_buffer_t *p0;
+	  ip6_header_t *ip60;
+	  ip6_frag_hdr_t *frag0;
+	  ip4_header_t *ip40;
+	  u16 frag_id0;
+	  u8 frag_more0;
+	  u16 frag_offset0;
+	  u32 next0;
+
+	  pi0 = to_next[0] = from[0];
+	  from += 1;
+	  n_left_from -= 1;
+	  to_next += 1;
+	  n_left_to_next -= 1;
+
+	  next0 = IP6_MAPT_TCP_UDP_NEXT_IP4_LOOKUP;
+	  p0 = vlib_get_buffer (vm, pi0);
+	  ip60 = vlib_buffer_get_current (p0);
+	  frag0 =
+	    (ip6_frag_hdr_t *) u8_ptr_add (ip60,
+					   vnet_buffer (p0)->map_t.
+					   v6.frag_offset);
+	  ip40 =
+	    (ip4_header_t *) u8_ptr_add (ip60,
+					 vnet_buffer (p0)->map_t.
+					 v6.l4_offset - sizeof (*ip40));
+	  vlib_buffer_advance (p0,
+			       vnet_buffer (p0)->map_t.v6.l4_offset -
+			       sizeof (*ip40));
+
+	  frag_id0 = frag_id_6to4 (frag0->identification);
+	  frag_more0 = ip6_frag_hdr_more (frag0);
+	  frag_offset0 = ip6_frag_hdr_offset (frag0);
+
+	  ip40->dst_address.as_u32 = vnet_buffer (p0)->map_t.v6.daddr;
+	  ip40->src_address.as_u32 = vnet_buffer (p0)->map_t.v6.saddr;
+	  ip40->ip_version_and_header_length =
+	    IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS;
+	  ip40->tos = ip6_translate_tos (ip60);
+	  ip40->length = u16_net_add (ip60->payload_length,
+				      sizeof (*ip40) -
+				      vnet_buffer (p0)->map_t.v6.l4_offset +
+				      sizeof (*ip60));
+	  ip40->fragment_id = frag_id0;
+	  ip40->flags_and_fragment_offset =
+	    clib_host_to_net_u16 (frag_offset0 |
+				  (frag_more0 ? IP4_HEADER_FLAG_MORE_FRAGMENTS
+				   : 0));
+	  ip40->ttl = ip60->hop_limit;
+	  ip40->protocol =
+	    (vnet_buffer (p0)->map_t.v6.l4_protocol ==
+	     IP_PROTOCOL_ICMP6) ? IP_PROTOCOL_ICMP : vnet_buffer (p0)->
+	    map_t.v6.l4_protocol;
+	  ip40->checksum = ip4_header_checksum (ip40);
+
+	  if (vnet_buffer (p0)->map_t.mtu < p0->current_length)
+	    {
+	      //Send to fragmentation node if necessary
+	      vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu;
+	      vnet_buffer (p0)->ip_frag.header_offset = 0;
+	      vnet_buffer (p0)->ip_frag.next_index = IP4_FRAG_NEXT_IP4_LOOKUP;
+	      next0 = IP6_MAPT_FRAGMENTED_NEXT_IP4_FRAG;
+	    }
+
+	  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 uword
+ip6_map_t_tcp_udp (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;
+  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);
+
+#ifdef IP6_MAP_T_DUAL_LOOP
+      while (n_left_from >= 4 && n_left_to_next >= 2)
+	{
+	  u32 pi0, pi1;
+	  vlib_buffer_t *p0, *p1;
+	  ip6_header_t *ip60, *ip61;
+	  ip_csum_t csum0, csum1;
+	  ip4_header_t *ip40, *ip41;
+	  u16 fragment_id0, flags0, *checksum0,
+	    fragment_id1, flags1, *checksum1;
+	  ip6_mapt_tcp_udp_next_t next0, next1;
+
+	  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;
+	  next0 = IP6_MAPT_TCP_UDP_NEXT_IP4_LOOKUP;
+	  next1 = IP6_MAPT_TCP_UDP_NEXT_IP4_LOOKUP;
+
+	  p0 = vlib_get_buffer (vm, pi0);
+	  p1 = vlib_get_buffer (vm, pi1);
+	  ip60 = vlib_buffer_get_current (p0);
+	  ip61 = vlib_buffer_get_current (p1);
+	  ip40 =
+	    (ip4_header_t *) u8_ptr_add (ip60,
+					 vnet_buffer (p0)->map_t.
+					 v6.l4_offset - sizeof (*ip40));
+	  ip41 =
+	    (ip4_header_t *) u8_ptr_add (ip61,
+					 vnet_buffer (p1)->map_t.
+					 v6.l4_offset - sizeof (*ip40));
+	  vlib_buffer_advance (p0,
+			       vnet_buffer (p0)->map_t.v6.l4_offset -
+			       sizeof (*ip40));
+	  vlib_buffer_advance (p1,
+			       vnet_buffer (p1)->map_t.v6.l4_offset -
+			       sizeof (*ip40));
+	  checksum0 =
+	    (u16 *) u8_ptr_add (ip60,
+				vnet_buffer (p0)->map_t.checksum_offset);
+	  checksum1 =
+	    (u16 *) u8_ptr_add (ip61,
+				vnet_buffer (p1)->map_t.checksum_offset);
+
+	  csum0 = ip_csum_sub_even (*checksum0, ip60->src_address.as_u64[0]);
+	  csum1 = ip_csum_sub_even (*checksum1, ip61->src_address.as_u64[0]);
+	  csum0 = ip_csum_sub_even (csum0, ip60->src_address.as_u64[1]);
+	  csum1 = ip_csum_sub_even (csum1, ip61->src_address.as_u64[1]);
+	  csum0 = ip_csum_sub_even (csum0, ip60->dst_address.as_u64[0]);
+	  csum1 = ip_csum_sub_even (csum0, ip61->dst_address.as_u64[0]);
+	  csum0 = ip_csum_sub_even (csum0, ip60->dst_address.as_u64[1]);
+	  csum1 = ip_csum_sub_even (csum1, ip61->dst_address.as_u64[1]);
+	  csum0 = ip_csum_add_even (csum0, vnet_buffer (p0)->map_t.v6.daddr);
+	  csum1 = ip_csum_add_even (csum1, vnet_buffer (p1)->map_t.v6.daddr);
+	  csum0 = ip_csum_add_even (csum0, vnet_buffer (p0)->map_t.v6.saddr);
+	  csum1 = ip_csum_add_even (csum1, vnet_buffer (p1)->map_t.v6.saddr);
+	  *checksum0 = ip_csum_fold (csum0);
+	  *checksum1 = ip_csum_fold (csum1);
+
+	  if (PREDICT_FALSE (vnet_buffer (p0)->map_t.v6.frag_offset))
+	    {
+	      ip6_frag_hdr_t *hdr = (ip6_frag_hdr_t *) u8_ptr_add (ip60,
+								   vnet_buffer
+								   (p0)->
+								   map_t.
+								   v6.frag_offset);
+	      fragment_id0 = frag_id_6to4 (hdr->identification);
+	      flags0 = clib_host_to_net_u16 (IP4_HEADER_FLAG_MORE_FRAGMENTS);
+	    }
+	  else
+	    {
+	      fragment_id0 = 0;
+	      flags0 = 0;
+	    }
+
+	  if (PREDICT_FALSE (vnet_buffer (p1)->map_t.v6.frag_offset))
+	    {
+	      ip6_frag_hdr_t *hdr = (ip6_frag_hdr_t *) u8_ptr_add (ip61,
+								   vnet_buffer
+								   (p1)->
+								   map_t.
+								   v6.frag_offset);
+	      fragment_id1 = frag_id_6to4 (hdr->identification);
+	      flags1 = clib_host_to_net_u16 (IP4_HEADER_FLAG_MORE_FRAGMENTS);
+	    }
+	  else
+	    {
+	      fragment_id1 = 0;
+	      flags1 = 0;
+	    }
+
+	  ip40->dst_address.as_u32 = vnet_buffer (p0)->map_t.v6.daddr;
+	  ip41->dst_address.as_u32 = vnet_buffer (p1)->map_t.v6.daddr;
+	  ip40->src_address.as_u32 = vnet_buffer (p0)->map_t.v6.saddr;
+	  ip41->src_address.as_u32 = vnet_buffer (p1)->map_t.v6.saddr;
+	  ip40->ip_version_and_header_length =
+	    IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS;
+	  ip41->ip_version_and_header_length =
+	    IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS;
+	  ip40->tos = ip6_translate_tos (ip60);
+	  ip41->tos = ip6_translate_tos (ip61);
+	  ip40->length = u16_net_add (ip60->payload_length,
+				      sizeof (*ip40) + sizeof (*ip60) -
+				      vnet_buffer (p0)->map_t.v6.l4_offset);
+	  ip41->length =
+	    u16_net_add (ip61->payload_length,
+			 sizeof (*ip40) + sizeof (*ip60) -
+			 vnet_buffer (p1)->map_t.v6.l4_offset);
+	  ip40->fragment_id = fragment_id0;
+	  ip41->fragment_id = fragment_id1;
+	  ip40->flags_and_fragment_offset = flags0;
+	  ip41->flags_and_fragment_offset = flags1;
+	  ip40->ttl = ip60->hop_limit;
+	  ip41->ttl = ip61->hop_limit;
+	  ip40->protocol = vnet_buffer (p0)->map_t.v6.l4_protocol;
+	  ip41->protocol = vnet_buffer (p1)->map_t.v6.l4_protocol;
+	  ip40->checksum = ip4_header_checksum (ip40);
+	  ip41->checksum = ip4_header_checksum (ip41);
+
+	  if (vnet_buffer (p0)->map_t.mtu < p0->current_length)
+	    {
+	      vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu;
+	      vnet_buffer (p0)->ip_frag.header_offset = 0;
+	      vnet_buffer (p0)->ip_frag.next_index = IP4_FRAG_NEXT_IP4_LOOKUP;
+	      next0 = IP6_MAPT_TCP_UDP_NEXT_IP4_FRAG;
+	    }
+
+	  if (vnet_buffer (p1)->map_t.mtu < p1->current_length)
+	    {
+	      vnet_buffer (p1)->ip_frag.mtu = vnet_buffer (p1)->map_t.mtu;
+	      vnet_buffer (p1)->ip_frag.header_offset = 0;
+	      vnet_buffer (p1)->ip_frag.next_index = IP4_FRAG_NEXT_IP4_LOOKUP;
+	      next1 = IP6_MAPT_TCP_UDP_NEXT_IP4_FRAG;
+	    }
+
+	  vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
+					   n_left_to_next, pi0, pi1, next0,
+					   next1);
+	}
+#endif
+
+      while (n_left_from > 0 && n_left_to_next > 0)
+	{
+	  u32 pi0;
+	  vlib_buffer_t *p0;
+	  ip6_header_t *ip60;
+	  u16 *checksum0;
+	  ip_csum_t csum0;
+	  ip4_header_t *ip40;
+	  u16 fragment_id0;
+	  u16 flags0;
+	  ip6_mapt_tcp_udp_next_t next0;
+
+	  pi0 = to_next[0] = from[0];
+	  from += 1;
+	  n_left_from -= 1;
+	  to_next += 1;
+	  n_left_to_next -= 1;
+	  next0 = IP6_MAPT_TCP_UDP_NEXT_IP4_LOOKUP;
+
+	  p0 = vlib_get_buffer (vm, pi0);
+	  ip60 = vlib_buffer_get_current (p0);
+	  ip40 =
+	    (ip4_header_t *) u8_ptr_add (ip60,
+					 vnet_buffer (p0)->map_t.
+					 v6.l4_offset - sizeof (*ip40));
+	  vlib_buffer_advance (p0,
+			       vnet_buffer (p0)->map_t.v6.l4_offset -
+			       sizeof (*ip40));
+	  checksum0 =
+	    (u16 *) u8_ptr_add (ip60,
+				vnet_buffer (p0)->map_t.checksum_offset);
+
+	  //TODO: This can probably be optimized
+	  csum0 = ip_csum_sub_even (*checksum0, ip60->src_address.as_u64[0]);
+	  csum0 = ip_csum_sub_even (csum0, ip60->src_address.as_u64[1]);
+	  csum0 = ip_csum_sub_even (csum0, ip60->dst_address.as_u64[0]);
+	  csum0 = ip_csum_sub_even (csum0, ip60->dst_address.as_u64[1]);
+	  csum0 = ip_csum_add_even (csum0, vnet_buffer (p0)->map_t.v6.daddr);
+	  csum0 = ip_csum_add_even (csum0, vnet_buffer (p0)->map_t.v6.saddr);
+	  *checksum0 = ip_csum_fold (csum0);
+
+	  if (PREDICT_FALSE (vnet_buffer (p0)->map_t.v6.frag_offset))
+	    {
+	      //Only the first fragment
+	      ip6_frag_hdr_t *hdr = (ip6_frag_hdr_t *) u8_ptr_add (ip60,
+								   vnet_buffer
+								   (p0)->
+								   map_t.
+								   v6.frag_offset);
+	      fragment_id0 = frag_id_6to4 (hdr->identification);
+	      flags0 = clib_host_to_net_u16 (IP4_HEADER_FLAG_MORE_FRAGMENTS);
+	    }
+	  else
+	    {
+	      fragment_id0 = 0;
+	      flags0 = 0;
+	    }
+
+	  ip40->dst_address.as_u32 = vnet_buffer (p0)->map_t.v6.daddr;
+	  ip40->src_address.as_u32 = vnet_buffer (p0)->map_t.v6.saddr;
+	  ip40->ip_version_and_header_length =
+	    IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS;
+	  ip40->tos = ip6_translate_tos (ip60);
+	  ip40->length = u16_net_add (ip60->payload_length,
+				      sizeof (*ip40) + sizeof (*ip60) -
+				      vnet_buffer (p0)->map_t.v6.l4_offset);
+	  ip40->fragment_id = fragment_id0;
+	  ip40->flags_and_fragment_offset = flags0;
+	  ip40->ttl = ip60->hop_limit;
+	  ip40->protocol = vnet_buffer (p0)->map_t.v6.l4_protocol;
+	  ip40->checksum = ip4_header_checksum (ip40);
+
+	  if (vnet_buffer (p0)->map_t.mtu < p0->current_length)
+	    {
+	      //Send to fragmentation node if necessary
+	      vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu;
+	      vnet_buffer (p0)->ip_frag.header_offset = 0;
+	      vnet_buffer (p0)->ip_frag.next_index = IP4_FRAG_NEXT_IP4_LOOKUP;
+	      next0 = IP6_MAPT_TCP_UDP_NEXT_IP4_FRAG;
+	    }
+
+	  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_t_classify (vlib_buffer_t * p0, ip6_header_t * ip60,
+		    map_domain_t * d0, i32 * src_port0,
+		    u8 * error0, ip6_mapt_next_t * next0,
+		    u32 l4_len0, ip6_frag_hdr_t * frag0)
+{
+  if (PREDICT_FALSE (vnet_buffer (p0)->map_t.v6.frag_offset &&
+		     ip6_frag_hdr_offset (frag0)))
+    {
+      *next0 = IP6_MAPT_NEXT_MAPT_FRAGMENTED;
+      if (d0->ea_bits_len == 0 && d0->rules)
+	{
+	  *src_port0 = 0;
+	}
+      else
+	{
+	  *src_port0 = ip6_map_fragment_get (ip60, frag0, d0);
+	  *error0 = (*src_port0 != -1) ? *error0 : MAP_ERROR_FRAGMENT_DROPPED;
+	}
+    }
+  else
+    if (PREDICT_TRUE
+	(vnet_buffer (p0)->map_t.v6.l4_protocol == IP_PROTOCOL_TCP))
+    {
+      *error0 =
+	l4_len0 < sizeof (tcp_header_t) ? MAP_ERROR_MALFORMED : *error0;
+      vnet_buffer (p0)->map_t.checksum_offset =
+	vnet_buffer (p0)->map_t.v6.l4_offset + 16;
+      *next0 = IP6_MAPT_NEXT_MAPT_TCP_UDP;
+      *src_port0 =
+	(i32) *
+	((u16 *) u8_ptr_add (ip60, vnet_buffer (p0)->map_t.v6.l4_offset));
+    }
+  else
+    if (PREDICT_TRUE
+	(vnet_buffer (p0)->map_t.v6.l4_protocol == IP_PROTOCOL_UDP))
+    {
+      *error0 =
+	l4_len0 < sizeof (udp_header_t) ? MAP_ERROR_MALFORMED : *error0;
+      vnet_buffer (p0)->map_t.checksum_offset =
+	vnet_buffer (p0)->map_t.v6.l4_offset + 6;
+      *next0 = IP6_MAPT_NEXT_MAPT_TCP_UDP;
+      *src_port0 =
+	(i32) *
+	((u16 *) u8_ptr_add (ip60, vnet_buffer (p0)->map_t.v6.l4_offset));
+    }
+  else if (vnet_buffer (p0)->map_t.v6.l4_protocol == IP_PROTOCOL_ICMP6)
+    {
+      *error0 =
+	l4_len0 < sizeof (icmp46_header_t) ? MAP_ERROR_MALFORMED : *error0;
+      *next0 = IP6_MAPT_NEXT_MAPT_ICMP;
+      if (d0->ea_bits_len == 0 && d0->rules)
+	{
+	  *src_port0 = 0;
+	}
+      else
+	if (((icmp46_header_t *)
+	     u8_ptr_add (ip60,
+			 vnet_buffer (p0)->map_t.v6.l4_offset))->code ==
+	    ICMP6_echo_reply
+	    || ((icmp46_header_t *)
+		u8_ptr_add (ip60,
+			    vnet_buffer (p0)->map_t.v6.l4_offset))->code ==
+	    ICMP6_echo_request)
+	{
+	  *src_port0 =
+	    (i32) *
+	    ((u16 *)
+	     u8_ptr_add (ip60, vnet_buffer (p0)->map_t.v6.l4_offset + 6));
+	}
+    }
+  else
+    {
+      //TODO: In case of 1:1 mapping, it might be possible to do something with those packets.
+      *error0 = MAP_ERROR_BAD_PROTOCOL;
+    }
+}
+
+static uword
+ip6_map_t (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_t_node.index);
+  vlib_combined_counter_main_t *cm = map_main.domain_counters;
+  u32 cpu_index = os_get_cpu_number ();
+
+  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);
+
+#ifdef IP6_MAP_T_DUAL_LOOP
+      while (n_left_from >= 4 && n_left_to_next >= 2)
+	{
+	  u32 pi0, pi1;
+	  vlib_buffer_t *p0, *p1;
+	  ip6_header_t *ip60, *ip61;
+	  u8 error0, error1;
+	  ip6_mapt_next_t next0, next1;
+	  u32 l4_len0, l4_len1;
+	  i32 src_port0, src_port1;
+	  map_domain_t *d0, *d1;
+	  ip6_frag_hdr_t *frag0, *frag1;
+	  u32 saddr0, saddr1;
+	  next0 = next1 = 0;	//Because compiler whines
+
+	  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;
+
+	  error0 = MAP_ERROR_NONE;
+	  error1 = MAP_ERROR_NONE;
+
+	  p0 = vlib_get_buffer (vm, pi0);
+	  p1 = vlib_get_buffer (vm, pi1);
+	  ip60 = vlib_buffer_get_current (p0);
+	  ip61 = vlib_buffer_get_current (p1);
+
+	  saddr0 = map_get_ip4 (&ip60->src_address);
+	  saddr1 = map_get_ip4 (&ip61->src_address);
+	  d0 = ip6_map_get_domain (vnet_buffer (p0)->ip.adj_index[VLIB_TX],
+				   (ip4_address_t *) & saddr0,
+				   &vnet_buffer (p0)->map_t.map_domain_index,
+				   &error0);
+	  d1 =
+	    ip6_map_get_domain (vnet_buffer (p1)->ip.adj_index[VLIB_TX],
+				(ip4_address_t *) & saddr1,
+				&vnet_buffer (p1)->map_t.map_domain_index,
+				&error1);
+
+	  vnet_buffer (p0)->map_t.v6.saddr = saddr0;
+	  vnet_buffer (p1)->map_t.v6.saddr = saddr1;
+	  vnet_buffer (p0)->map_t.v6.daddr =
+	    ip6_map_t_embedded_address (d0, &ip60->dst_address);
+	  vnet_buffer (p1)->map_t.v6.daddr =
+	    ip6_map_t_embedded_address (d1, &ip61->dst_address);
+	  vnet_buffer (p0)->map_t.mtu = d0->mtu ? d0->mtu : ~0;
+	  vnet_buffer (p1)->map_t.mtu = d1->mtu ? d1->mtu : ~0;
+
+	  if (PREDICT_FALSE (ip6_parse (ip60, p0->current_length,
+					&(vnet_buffer (p0)->map_t.
+					  v6.l4_protocol),
+					&(vnet_buffer (p0)->map_t.
+					  v6.l4_offset),
+					&(vnet_buffer (p0)->map_t.
+					  v6.frag_offset))))
+	    {
+	      error0 = MAP_ERROR_MALFORMED;
+	      next0 = IP6_MAPT_NEXT_DROP;
+	    }
+
+	  if (PREDICT_FALSE (ip6_parse (ip61, p1->current_length,
+					&(vnet_buffer (p1)->map_t.
+					  v6.l4_protocol),
+					&(vnet_buffer (p1)->map_t.
+					  v6.l4_offset),
+					&(vnet_buffer (p1)->map_t.
+					  v6.frag_offset))))
+	    {
+	      error1 = MAP_ERROR_MALFORMED;
+	      next1 = IP6_MAPT_NEXT_DROP;
+	    }
+
+	  src_port0 = src_port1 = -1;
+	  l4_len0 = (u32) clib_net_to_host_u16 (ip60->payload_length) +
+	    sizeof (*ip60) - vnet_buffer (p0)->map_t.v6.l4_offset;
+	  l4_len1 = (u32) clib_net_to_host_u16 (ip61->payload_length) +
+	    sizeof (*ip60) - vnet_buffer (p1)->map_t.v6.l4_offset;
+	  frag0 =
+	    (ip6_frag_hdr_t *) u8_ptr_add (ip60,
+					   vnet_buffer (p0)->map_t.
+					   v6.frag_offset);
+	  frag1 =
+	    (ip6_frag_hdr_t *) u8_ptr_add (ip61,
+					   vnet_buffer (p1)->map_t.
+					   v6.frag_offset);
+
+	  ip6_map_t_classify (p0, ip60, d0, &src_port0, &error0, &next0,
+			      l4_len0, frag0);
+	  ip6_map_t_classify (p1, ip61, d1, &src_port1, &error1, &next1,
+			      l4_len1, frag1);
+
+	  if (PREDICT_FALSE
+	      ((src_port0 != -1)
+	       && (ip60->src_address.as_u64[0] !=
+		   map_get_pfx_net (d0, vnet_buffer (p0)->map_t.v6.saddr,
+				    src_port0)
+		   || ip60->src_address.as_u64[1] != map_get_sfx_net (d0,
+								      vnet_buffer
+								      (p0)->map_t.v6.saddr,
+								      src_port0))))
+	    {
+	      error0 = MAP_ERROR_SEC_CHECK;
+	    }
+
+	  if (PREDICT_FALSE
+	      ((src_port1 != -1)
+	       && (ip61->src_address.as_u64[0] !=
+		   map_get_pfx_net (d1, vnet_buffer (p1)->map_t.v6.saddr,
+				    src_port1)
+		   || ip61->src_address.as_u64[1] != map_get_sfx_net (d1,
+								      vnet_buffer
+								      (p1)->map_t.v6.saddr,
+								      src_port1))))
+	    {
+	      error1 = MAP_ERROR_SEC_CHECK;
+	    }
+
+	  if (PREDICT_FALSE (vnet_buffer (p0)->map_t.v6.frag_offset &&
+			     !ip6_frag_hdr_offset ((ip6_frag_hdr_t *)
+						   u8_ptr_add (ip60,
+							       vnet_buffer
+							       (p0)->map_t.
+							       v6.frag_offset)))
+	      && (src_port0 != -1) && (d0->ea_bits_len != 0 || !d0->rules)
+	      && (error0 == MAP_ERROR_NONE))
+	    {
+	      ip6_map_fragment_cache (ip60,
+				      (ip6_frag_hdr_t *) u8_ptr_add (ip60,
+								     vnet_buffer
+								     (p0)->map_t.
+								     v6.frag_offset),
+				      d0, src_port0);
+	    }
+
+	  if (PREDICT_FALSE (vnet_buffer (p1)->map_t.v6.frag_offset &&
+			     !ip6_frag_hdr_offset ((ip6_frag_hdr_t *)
+						   u8_ptr_add (ip61,
+							       vnet_buffer
+							       (p1)->map_t.
+							       v6.frag_offset)))
+	      && (src_port1 != -1) && (d1->ea_bits_len != 0 || !d1->rules)
+	      && (error1 == MAP_ERROR_NONE))
+	    {
+	      ip6_map_fragment_cache (ip61,
+				      (ip6_frag_hdr_t *) u8_ptr_add (ip61,
+								     vnet_buffer
+								     (p1)->map_t.
+								     v6.frag_offset),
+				      d1, src_port1);
+	    }
+
+	  if (PREDICT_TRUE
+	      (error0 == MAP_ERROR_NONE && next0 != IP6_MAPT_NEXT_MAPT_ICMP))
+	    {
+	      vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_RX,
+					       cpu_index,
+					       vnet_buffer (p0)->
+					       map_t.map_domain_index, 1,
+					       clib_net_to_host_u16
+					       (ip60->payload_length));
+	    }
+
+	  if (PREDICT_TRUE
+	      (error1 == MAP_ERROR_NONE && next1 != IP6_MAPT_NEXT_MAPT_ICMP))
+	    {
+	      vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_RX,
+					       cpu_index,
+					       vnet_buffer (p1)->
+					       map_t.map_domain_index, 1,
+					       clib_net_to_host_u16
+					       (ip61->payload_length));
+	    }
+
+	  next0 = (error0 != MAP_ERROR_NONE) ? IP6_MAPT_NEXT_DROP : next0;
+	  next1 = (error1 != MAP_ERROR_NONE) ? IP6_MAPT_NEXT_DROP : next1;
+	  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);
+	}
+#endif
+
+      while (n_left_from > 0 && n_left_to_next > 0)
+	{
+	  u32 pi0;
+	  vlib_buffer_t *p0;
+	  ip6_header_t *ip60;
+	  u8 error0;
+	  u32 l4_len0;
+	  i32 src_port0;
+	  map_domain_t *d0;
+	  ip6_frag_hdr_t *frag0;
+	  ip6_mapt_next_t next0 = 0;
+	  u32 saddr;
+
+	  pi0 = to_next[0] = from[0];
+	  from += 1;
+	  n_left_from -= 1;
+	  to_next += 1;
+	  n_left_to_next -= 1;
+	  error0 = MAP_ERROR_NONE;
+
+	  p0 = vlib_get_buffer (vm, pi0);
+	  ip60 = vlib_buffer_get_current (p0);
+	  //Save saddr in a different variable to not overwrite ip.adj_index
+	  saddr = map_get_ip4 (&ip60->src_address);
+	  d0 = ip6_map_get_domain (vnet_buffer (p0)->ip.adj_index[VLIB_TX],
+				   (ip4_address_t *) & saddr,
+				   &vnet_buffer (p0)->map_t.map_domain_index,
+				   &error0);
+
+	  //FIXME: What if d0 is null
+	  vnet_buffer (p0)->map_t.v6.saddr = saddr;
+	  vnet_buffer (p0)->map_t.v6.daddr =
+	    ip6_map_t_embedded_address (d0, &ip60->dst_address);
+	  vnet_buffer (p0)->map_t.mtu = d0->mtu ? d0->mtu : ~0;
+
+	  if (PREDICT_FALSE (ip6_parse (ip60, p0->current_length,
+					&(vnet_buffer (p0)->map_t.
+					  v6.l4_protocol),
+					&(vnet_buffer (p0)->map_t.
+					  v6.l4_offset),
+					&(vnet_buffer (p0)->map_t.
+					  v6.frag_offset))))
+	    {
+	      error0 = MAP_ERROR_MALFORMED;
+	      next0 = IP6_MAPT_NEXT_DROP;
+	    }
+
+	  src_port0 = -1;
+	  l4_len0 = (u32) clib_net_to_host_u16 (ip60->payload_length) +
+	    sizeof (*ip60) - vnet_buffer (p0)->map_t.v6.l4_offset;
+	  frag0 =
+	    (ip6_frag_hdr_t *) u8_ptr_add (ip60,
+					   vnet_buffer (p0)->map_t.
+					   v6.frag_offset);
+
+
+	  if (PREDICT_FALSE (vnet_buffer (p0)->map_t.v6.frag_offset &&
+			     ip6_frag_hdr_offset (frag0)))
+	    {
+	      src_port0 = ip6_map_fragment_get (ip60, frag0, d0);
+	      error0 = (src_port0 != -1) ? error0 : MAP_ERROR_FRAGMENT_MEMORY;
+	      next0 = IP6_MAPT_NEXT_MAPT_FRAGMENTED;
+	    }
+	  else
+	    if (PREDICT_TRUE
+		(vnet_buffer (p0)->map_t.v6.l4_protocol == IP_PROTOCOL_TCP))
+	    {
+	      error0 =
+		l4_len0 <
+		sizeof (tcp_header_t) ? MAP_ERROR_MALFORMED : error0;
+	      vnet_buffer (p0)->map_t.checksum_offset =
+		vnet_buffer (p0)->map_t.v6.l4_offset + 16;
+	      next0 = IP6_MAPT_NEXT_MAPT_TCP_UDP;
+	      src_port0 =
+		(i32) *
+		((u16 *)
+		 u8_ptr_add (ip60, vnet_buffer (p0)->map_t.v6.l4_offset));
+	    }
+	  else
+	    if (PREDICT_TRUE
+		(vnet_buffer (p0)->map_t.v6.l4_protocol == IP_PROTOCOL_UDP))
+	    {
+	      error0 =
+		l4_len0 <
+		sizeof (udp_header_t) ? MAP_ERROR_MALFORMED : error0;
+	      vnet_buffer (p0)->map_t.checksum_offset =
+		vnet_buffer (p0)->map_t.v6.l4_offset + 6;
+	      next0 = IP6_MAPT_NEXT_MAPT_TCP_UDP;
+	      src_port0 =
+		(i32) *
+		((u16 *)
+		 u8_ptr_add (ip60, vnet_buffer (p0)->map_t.v6.l4_offset));
+	    }
+	  else if (vnet_buffer (p0)->map_t.v6.l4_protocol ==
+		   IP_PROTOCOL_ICMP6)
+	    {
+	      error0 =
+		l4_len0 <
+		sizeof (icmp46_header_t) ? MAP_ERROR_MALFORMED : error0;
+	      next0 = IP6_MAPT_NEXT_MAPT_ICMP;
+	      if (((icmp46_header_t *)
+		   u8_ptr_add (ip60,
+			       vnet_buffer (p0)->map_t.v6.l4_offset))->code ==
+		  ICMP6_echo_reply
+		  || ((icmp46_header_t *)
+		      u8_ptr_add (ip60,
+				  vnet_buffer (p0)->map_t.v6.
+				  l4_offset))->code == ICMP6_echo_request)
+		src_port0 =
+		  (i32) *
+		  ((u16 *)
+		   u8_ptr_add (ip60,
+			       vnet_buffer (p0)->map_t.v6.l4_offset + 6));
+	    }
+	  else
+	    {
+	      //TODO: In case of 1:1 mapping, it might be possible to do something with those packets.
+	      error0 = MAP_ERROR_BAD_PROTOCOL;
+	    }
+
+	  //Security check
+	  if (PREDICT_FALSE
+	      ((src_port0 != -1)
+	       && (ip60->src_address.as_u64[0] !=
+		   map_get_pfx_net (d0, vnet_buffer (p0)->map_t.v6.saddr,
+				    src_port0)
+		   || ip60->src_address.as_u64[1] != map_get_sfx_net (d0,
+								      vnet_buffer
+								      (p0)->map_t.v6.saddr,
+								      src_port0))))
+	    {
+	      //Security check when src_port0 is not zero (non-first fragment, UDP or TCP)
+	      error0 = MAP_ERROR_SEC_CHECK;
+	    }
+
+	  //Fragmented first packet needs to be cached for following packets
+	  if (PREDICT_FALSE (vnet_buffer (p0)->map_t.v6.frag_offset &&
+			     !ip6_frag_hdr_offset ((ip6_frag_hdr_t *)
+						   u8_ptr_add (ip60,
+							       vnet_buffer
+							       (p0)->map_t.
+							       v6.frag_offset)))
+	      && (src_port0 != -1) && (d0->ea_bits_len != 0 || !d0->rules)
+	      && (error0 == MAP_ERROR_NONE))
+	    {
+	      ip6_map_fragment_cache (ip60,
+				      (ip6_frag_hdr_t *) u8_ptr_add (ip60,
+								     vnet_buffer
+								     (p0)->map_t.
+								     v6.frag_offset),
+				      d0, src_port0);
+	    }
+
+	  if (PREDICT_TRUE
+	      (error0 == MAP_ERROR_NONE && next0 != IP6_MAPT_NEXT_MAPT_ICMP))
+	    {
+	      vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_RX,
+					       cpu_index,
+					       vnet_buffer (p0)->
+					       map_t.map_domain_index, 1,
+					       clib_net_to_host_u16
+					       (ip60->payload_length));
+	    }
+
+	  next0 = (error0 != MAP_ERROR_NONE) ? IP6_MAPT_NEXT_DROP : next0;
+	  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_t_error_strings[] = {
+#define _(sym,string) string,
+  foreach_map_error
+#undef _
+};
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE(ip6_map_t_fragmented_node) = {
+  .function = ip6_map_t_fragmented,
+  .name = "ip6-map-t-fragmented",
+  .vector_size = sizeof (u32),
+  .format_trace = format_map_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+
+  .n_errors = MAP_N_ERROR,
+  .error_strings = map_t_error_strings,
+
+  .n_next_nodes = IP6_MAPT_FRAGMENTED_N_NEXT,
+  .next_nodes = {
+      [IP6_MAPT_FRAGMENTED_NEXT_IP4_LOOKUP] = "ip4-lookup",
+      [IP6_MAPT_FRAGMENTED_NEXT_IP4_FRAG] = IP4_FRAG_NODE_NAME,
+      [IP6_MAPT_FRAGMENTED_NEXT_DROP] = "error-drop",
+  },
+};
+/* *INDENT-ON* */
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE(ip6_map_t_icmp_node) = {
+  .function = ip6_map_t_icmp,
+  .name = "ip6-map-t-icmp",
+  .vector_size = sizeof (u32),
+  .format_trace = format_map_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+
+  .n_errors = MAP_N_ERROR,
+  .error_strings = map_t_error_strings,
+
+  .n_next_nodes = IP6_MAPT_ICMP_N_NEXT,
+  .next_nodes = {
+      [IP6_MAPT_ICMP_NEXT_IP4_LOOKUP] = "ip4-lookup",
+      [IP6_MAPT_ICMP_NEXT_IP4_FRAG] = IP4_FRAG_NODE_NAME,
+      [IP6_MAPT_ICMP_NEXT_DROP] = "error-drop",
+  },
+};
+/* *INDENT-ON* */
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE(ip6_map_t_tcp_udp_node) = {
+  .function = ip6_map_t_tcp_udp,
+  .name = "ip6-map-t-tcp-udp",
+  .vector_size = sizeof (u32),
+  .format_trace = format_map_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+
+  .n_errors = MAP_N_ERROR,
+  .error_strings = map_t_error_strings,
+
+  .n_next_nodes = IP6_MAPT_TCP_UDP_N_NEXT,
+  .next_nodes = {
+      [IP6_MAPT_TCP_UDP_NEXT_IP4_LOOKUP] = "ip4-lookup",
+      [IP6_MAPT_TCP_UDP_NEXT_IP4_FRAG] = IP4_FRAG_NODE_NAME,
+      [IP6_MAPT_TCP_UDP_NEXT_DROP] = "error-drop",
+  },
+};
+/* *INDENT-ON* */
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE(ip6_map_t_node) = {
+  .function = ip6_map_t,
+  .name = "ip6-map-t",
+  .vector_size = sizeof(u32),
+  .format_trace = format_map_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+
+  .n_errors = MAP_N_ERROR,
+  .error_strings = map_t_error_strings,
+
+  .n_next_nodes = IP6_MAPT_N_NEXT,
+  .next_nodes = {
+      [IP6_MAPT_NEXT_MAPT_TCP_UDP] = "ip6-map-t-tcp-udp",
+      [IP6_MAPT_NEXT_MAPT_ICMP] = "ip6-map-t-icmp",
+      [IP6_MAPT_NEXT_MAPT_FRAGMENTED] = "ip6-map-t-fragmented",
+      [IP6_MAPT_NEXT_DROP] = "error-drop",
+  },
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */