aboutsummaryrefslogtreecommitdiffstats
path: root/build-root
AgeCommit message (Expand)AuthorFilesLines
2017-03-14Update CSIT tests 170302 -> 170313Jan Gelety1-1/+1
2017-03-04Fix duplicate binary API registration messages / bugsDave Barach1-2/+2
2017-03-02Update CSIT tests 170220 -> 170302Jan Gelety1-1/+1
2017-02-24Fixed QAT device binding and device unbinding when vpp package is removedRadu Nicolau2-2/+2
2017-02-22VPP-635: CLI Memory leak with invalid parameterBilly McFall1-4/+15
2017-02-20Update CSIT tests 170213 -> 170220Jan Gelety1-1/+1
2017-02-14Update CSIT tests 170129 -> 170213Jan Gelety1-1/+1
2017-02-10Update plugin templatesDave Barach3-118/+106
2017-02-04dpdk: move to uio_pci_genericDamjan Marion3-5/+5
2017-02-02Refactor fragile msg macro W and W2 to not burry return control flow.Jon Loeliger1-1/+3
2017-02-02Localize the timeout variable within the W message macro.Jon Loeliger1-2/+1
2017-02-02Convert message macro S to accept a message pointer parameter;Jon Loeliger1-2/+2
2017-02-02Convert M() and M2() macros to honor their second, mp, parameter.Jon Loeliger1-2/+2
2017-02-02Ensure all M() and M2() second parameters are the message pointer.Jon Loeliger1-1/+1
2017-02-02Update default Vagrant box to Ubuntu 16.04, VPP-616Dave Wallace3-12/+22
2017-01-31Prep work for Coverity upload processing via JenkinsDave Barach1-0/+53
2017-01-31Update CSIT tests 170122 -> 170129Jan Gelety1-1/+1
2017-01-27package only the vpp binaries (rpm)Gabriel Ganne1-1/+1
2017-01-25Update CSIT tests 170108 -> 170122Jan Gelety1-1/+1
2017-01-20Add dpdk development packagingDamjan Marion6-54/+2
2017-01-17vagrant: stop rsync from wiping changes from /vppPadraig Connolly1-15/+18
2017-01-17fix rpm warnings for defattr directory of lua/*Gabriel Ganne1-1/+1
2017-01-13Fix remove-rpath script, take 2Damjan Marion1-1/+1
2017-01-13Fix remove-rpath scriptDamjan Marion1-1/+1
2017-01-13vppctl: new bash completion for vppctl commandsPadraig Connolly1-0/+6
2017-01-11Remove unnecessary build macro to fix slow builds.Thomas F Herbert1-4/+0
2017-01-11Makefile.am cleanupDamjan Marion2-41/+1
2017-01-10Revert "vppctl: bash completion for vppctl commands"Damjan Marion2-8/+1
2017-01-09vppctl: bash completion for vppctl commandsPadraig Connolly2-1/+8
2017-01-09Update CSIT tests 170101 -> 170108Jan Gelety1-1/+1
2017-01-04rename vpp python's api debian scriptsGabriel Ganne2-0/+0
2017-01-03fix version.h generation for out-of-tree buildsDamjan Marion1-54/+1
2017-01-03Do not require external vppapigen when not cross-compilingDamjan Marion1-1/+0
2017-01-03deb: fix issues in debian/control, silence some warningsDamjan Marion2-7/+12
2017-01-03vpp-python-api deb packaging - use easy_install to install the python apiroot2-0/+13
2017-01-02Update CSIT tests 161218 -> 170101Jan Gelety1-1/+1
2017-01-02Update emacs plugin generator skeletonDave Barach5-76/+27
2017-01-01Move java,lua api and remaining plugins to src/Damjan Marion10-32/+90
2016-12-28Reorganize source tree to use single autotools instanceDamjan Marion7-17/+29
2016-12-21vagrant: Fixing sudo related vagrant errorsRay Kinsella1-5/+8
2016-12-21vagrant: updated Vagrantfile to use rsyncRay Kinsella2-58/+16
2016-12-21fix sample-plugin rpm packagingGabriel Ganne1-2/+2
2016-12-20Remove RPATH from binaries before creating .deb and .rpm packagesDamjan Marion4-2/+32
2016-12-19Update CSIT tests 161211 -> 161218Jan Gelety1-1/+1
2016-12-12Update CSIT tests 161204 -> 161211Jan Gelety1-1/+1
2016-12-09python api rpm packaging - json files are not executablesGabriel Ganne1-2/+2
2016-12-08vpp-python-api packaging - use easy_install to install the python apiGabriel Ganne1-7/+10
2016-12-05Update CSIT tests 161128 -> 161204Jan1-1/+1
2016-12-02API: Packaging of JSON files.Ole Troan4-2/+37
2016-12-01"Update CSIT tests 161120 -> 161128""Peter Mikus1-1/+1
945' href='#n945'>945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 
/*
 * decap.c - decapsulate VXLAN GPE
 *
 * Copyright (c) 2013 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 Functions for decapsulating VXLAN GPE tunnels
 *
*/

#include <vlib/vlib.h>
#include <vnet/pg/pg.h>
#include <vnet/vxlan-gpe/vxlan_gpe.h>

vlib_node_registration_t vxlan_gpe_input_node;

/**
 * @brief Struct for VXLAN GPE decap packet tracing
 *
 */
typedef struct
{
  u32 next_index;
  u32 tunnel_index;
  u32 error;
} vxlan_gpe_rx_trace_t;

/**
 * @brief Tracing function for VXLAN GPE packet decapsulation
 *
 * @param *s
 * @param *args
 *
 * @return *s
 *
 */
static u8 *
format_vxlan_gpe_rx_trace (u8 * s, va_list * args)
{
  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
  vxlan_gpe_rx_trace_t *t = va_arg (*args, vxlan_gpe_rx_trace_t *);

  if (t->tunnel_index != ~0)
    {
      s = format (s, "VXLAN-GPE: tunnel %d next %d error %d", t->tunnel_index,
		  t->next_index, t->error);
    }
  else
    {
      s = format (s, "VXLAN-GPE: no tunnel next %d error %d\n", t->next_index,
		  t->error);
    }
  return s;
}

/**
 * @brief Tracing function for VXLAN GPE packet decapsulation including length
 *
 * @param *s
 * @param *args
 *
 * @return *s
 *
 */
static u8 *
format_vxlan_gpe_with_length (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 *);


  return s;
}

/**
 * @brief Common processing for IPv4 and IPv6 VXLAN GPE decap dispatch functions
 *
 * It is worth noting that other than trivial UDP forwarding (transit), VXLAN GPE
 * tunnels are "terminate local". This means that there is no "TX" interface for this
 * decap case, so that field in the buffer_metadata can be "used for something else".
 * The something else in this case is, for the IPv4/IPv6 inner-packet type case, the
 * FIB index used to look up the inner-packet's adjacency.
 *
 *      vnet_buffer(b0)->sw_if_index[VLIB_TX] = t0->decap_fib_index;
 *
 * @param *vm
 * @param *node
 * @param *from_frame
 * @param is_ip4
 *
 * @return from_frame->n_vectors
 *
 */
always_inline uword
vxlan_gpe_input (vlib_main_t * vm,
		 vlib_node_runtime_t * node,
		 vlib_frame_t * from_frame, u8 is_ip4)
{
  u32 n_left_from, next_index, *from, *to_next;
  vxlan_gpe_main_t *nngm = &vxlan_gpe_main;
  vnet_main_t *vnm = nngm->vnet_main;
  vnet_interface_main_t *im = &vnm->interface_main;
  u32 last_tunnel_index = ~0;
  vxlan4_gpe_tunnel_key_t last_key4;
  vxlan6_gpe_tunnel_key_t last_key6;
  u32 pkts_decapsulated = 0;
  u32 thread_index = vlib_get_thread_index ();
  u32 stats_sw_if_index, stats_n_packets, stats_n_bytes;

  if (is_ip4)
    memset (&last_key4, 0xff, sizeof (last_key4));
  else
    memset (&last_key6, 0xff, sizeof (last_key6));

  from = vlib_frame_vector_args (from_frame);
  n_left_from = from_frame->n_vectors;

  next_index = node->cached_next_index;
  stats_sw_if_index = node->runtime_data[0];
  stats_n_packets = stats_n_bytes = 0;

  while (n_left_from > 0)
    {
      u32 n_left_to_next;

      vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);

      while (n_left_from >= 4 && n_left_to_next >= 2)
	{
	  u32 bi0, bi1;
	  vlib_buffer_t *b0, *b1;
	  u32 next0, next1;
	  ip4_vxlan_gpe_header_t *iuvn4_0, *iuvn4_1;
	  ip6_vxlan_gpe_header_t *iuvn6_0, *iuvn6_1;
	  uword *p0, *p1;
	  u32 tunnel_index0, tunnel_index1;
	  vxlan_gpe_tunnel_t *t0, *t1;
	  vxlan4_gpe_tunnel_key_t key4_0, key4_1;
	  vxlan6_gpe_tunnel_key_t key6_0, key6_1;
	  u32 error0, error1;
	  u32 sw_if_index0, sw_if_index1, len0, len1;

	  /* 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);

	    CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
	    CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
	  }

	  bi0 = from[0];
	  bi1 = from[1];
	  to_next[0] = bi0;
	  to_next[1] = bi1;
	  from += 2;
	  to_next += 2;
	  n_left_to_next -= 2;
	  n_left_from -= 2;

	  b0 = vlib_get_buffer (vm, bi0);
	  b1 = vlib_get_buffer (vm, bi1);

	  if (is_ip4)
	    {
	      /* udp leaves current_data pointing at the vxlan-gpe header */
	      vlib_buffer_advance (b0,
				   -(word) (sizeof (udp_header_t) +
					    sizeof (ip4_header_t)));
	      vlib_buffer_advance (b1,
				   -(word) (sizeof (udp_header_t) +
					    sizeof (ip4_header_t)));

	      iuvn4_0 = vlib_buffer_get_current (b0);
	      iuvn4_1 = vlib_buffer_get_current (b1);

	      /* pop (ip, udp, vxlan) */
	      vlib_buffer_advance (b0, sizeof (*iuvn4_0));
	      vlib_buffer_advance (b1, sizeof (*iuvn4_1));
	    }
	  else
	    {
	      /* udp leaves current_data pointing at the vxlan-gpe header */
	      vlib_buffer_advance (b0,
				   -(word) (sizeof (udp_header_t) +
					    sizeof (ip6_header_t)));
	      vlib_buffer_advance (b1,
				   -(word) (sizeof (udp_header_t) +
					    sizeof (ip6_header_t)));

	      iuvn6_0 = vlib_buffer_get_current (b0);
	      iuvn6_1 = vlib_buffer_get_current (b1);

	      /* pop (ip, udp, vxlan) */
	      vlib_buffer_advance (b0, sizeof (*iuvn6_0));
	      vlib_buffer_advance (b1, sizeof (*iuvn6_1));
	    }

	  tunnel_index0 = ~0;
	  tunnel_index1 = ~0;
	  error0 = 0;
	  error1 = 0;

	  if (is_ip4)
	    {
	      next0 =
		(iuvn4_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
		nngm->decap_next_node_list[iuvn4_0->vxlan.protocol] :
		VXLAN_GPE_INPUT_NEXT_DROP;
	      next1 =
		(iuvn4_1->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
		nngm->decap_next_node_list[iuvn4_1->vxlan.protocol] :
		VXLAN_GPE_INPUT_NEXT_DROP;

	      key4_0.local = iuvn4_0->ip4.dst_address.as_u32;
	      key4_1.local = iuvn4_1->ip4.dst_address.as_u32;

	      key4_0.remote = iuvn4_0->ip4.src_address.as_u32;
	      key4_1.remote = iuvn4_1->ip4.src_address.as_u32;

	      key4_0.vni = iuvn4_0->vxlan.vni_res;
	      key4_1.vni = iuvn4_1->vxlan.vni_res;

	      key4_0.pad = 0;
	      key4_1.pad = 0;
	    }
	  else			/* is_ip6 */
	    {
	      next0 = (iuvn6_0->vxlan.protocol < node->n_next_nodes) ?
		iuvn6_0->vxlan.protocol : VXLAN_GPE_INPUT_NEXT_DROP;
	      next1 = (iuvn6_1->vxlan.protocol < node->n_next_nodes) ?
		iuvn6_1->vxlan.protocol : VXLAN_GPE_INPUT_NEXT_DROP;

	      key6_0.local.as_u64[0] = iuvn6_0->ip6.dst_address.as_u64[0];
	      key6_0.local.as_u64[1] = iuvn6_0->ip6.dst_address.as_u64[1];
	      key6_1.local.as_u64[0] = iuvn6_1->ip6.dst_address.as_u64[0];
	      key6_1.local.as_u64[1] = iuvn6_1->ip6.dst_address.as_u64[1];

	      key6_0.remote.as_u64[0] = iuvn6_0->ip6.src_address.as_u64[0];
	      key6_0.remote.as_u64[1] = iuvn6_0->ip6.src_address.as_u64[1];
	      key6_1.remote.as_u64[0] = iuvn6_1->ip6.src_address.as_u64[0];
	      key6_1.remote.as_u64[1] = iuvn6_1->ip6.src_address.as_u64[1];

	      key6_0.vni = iuvn6_0->vxlan.vni_res;
	      key6_1.vni = iuvn6_1->vxlan.vni_res;
	    }

	  /* Processing packet 0 */
	  if (is_ip4)
	    {
	      /* Processing for key4_0 */
	      if (PREDICT_FALSE ((key4_0.as_u64[0] != last_key4.as_u64[0])
				 || (key4_0.as_u64[1] !=
				     last_key4.as_u64[1])))
		{
		  p0 = hash_get_mem (nngm->vxlan4_gpe_tunnel_by_key, &key4_0);

		  if (p0 == 0)
		    {
		      error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
		      goto trace0;
		    }

		  last_key4.as_u64[0] = key4_0.as_u64[0];
		  last_key4.as_u64[1] = key4_0.as_u64[1];
		  tunnel_index0 = last_tunnel_index = p0[0];
		}
	      else
		tunnel_index0 = last_tunnel_index;
	    }
	  else			/* is_ip6 */
	    {
	      next0 =
		(iuvn6_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
		nngm->decap_next_node_list[iuvn6_0->vxlan.protocol] :
		VXLAN_GPE_INPUT_NEXT_DROP;
	      next1 =
		(iuvn6_1->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
		nngm->decap_next_node_list[iuvn6_1->vxlan.protocol] :
		VXLAN_GPE_INPUT_NEXT_DROP;

	      key6_0.local.as_u64[0] = iuvn6_0->ip6.dst_address.as_u64[0];
	      key6_0.local.as_u64[1] = iuvn6_0->ip6.dst_address.as_u64[1];
	      key6_1.local.as_u64[0] = iuvn6_1->ip6.dst_address.as_u64[0];
	      key6_1.local.as_u64[1] = iuvn6_1->ip6.dst_address.as_u64[1];

	      key6_0.remote.as_u64[0] = iuvn6_0->ip6.src_address.as_u64[0];
	      key6_0.remote.as_u64[1] = iuvn6_0->ip6.src_address.as_u64[1];
	      key6_1.remote.as_u64[0] = iuvn6_1->ip6.src_address.as_u64[0];
	      key6_1.remote.as_u64[1] = iuvn6_1->ip6.src_address.as_u64[1];

	      key6_0.vni = iuvn6_0->vxlan.vni_res;
	      key6_1.vni = iuvn6_1->vxlan.vni_res;

	      /* Processing for key6_0 */
	      if (PREDICT_FALSE
		  (memcmp (&key6_0, &last_key6, sizeof (last_key6)) != 0))
		{
		  p0 = hash_get_mem (nngm->vxlan6_gpe_tunnel_by_key, &key6_0);

		  if (p0 == 0)
		    {
		      error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
		      goto trace0;
		    }

		  memcpy (&last_key6, &key6_0, sizeof (key6_0));
		  tunnel_index0 = last_tunnel_index = p0[0];
		}
	      else
		tunnel_index0 = last_tunnel_index;
	    }

	  t0 = pool_elt_at_index (nngm->tunnels, tunnel_index0);


	  sw_if_index0 = t0->sw_if_index;
	  len0 = vlib_buffer_length_in_chain (vm, b0);

	  /* Required to make the l2 tag push / pop code work on l2 subifs */
	  vnet_update_l2_len (b0);

	  /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */
	  vnet_buffer (b0)->sw_if_index[VLIB_RX] = t0->sw_if_index;

      /**
       * ip[46] lookup in the configured FIB
       */
	  vnet_buffer (b0)->sw_if_index[VLIB_TX] = t0->decap_fib_index;

	  pkts_decapsulated++;
	  stats_n_packets += 1;
	  stats_n_bytes += len0;

	  if (PREDICT_FALSE (sw_if_index0 != stats_sw_if_index))
	    {
	      stats_n_packets -= 1;
	      stats_n_bytes -= len0;
	      if (stats_n_packets)
		vlib_increment_combined_counter (im->combined_sw_if_counters +
						 VNET_INTERFACE_COUNTER_RX,
						 thread_index,
						 stats_sw_if_index,
						 stats_n_packets,
						 stats_n_bytes);
	      stats_n_packets = 1;
	      stats_n_bytes = len0;
	      stats_sw_if_index = sw_if_index0;
	    }

	trace0:b0->error = error0 ? node->errors[error0] : 0;

	  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
	    {
	      vxlan_gpe_rx_trace_t *tr =
		vlib_add_trace (vm, node, b0, sizeof (*tr));
	      tr->next_index = next0;
	      tr->error = error0;
	      tr->tunnel_index = tunnel_index0;
	    }

	  /* Process packet 1 */
	  if (is_ip4)
	    {
	      /* Processing for key4_1 */
	      if (PREDICT_FALSE ((key4_1.as_u64[0] != last_key4.as_u64[0])
				 || (key4_1.as_u64[1] !=
				     last_key4.as_u64[1])))
		{
		  p1 = hash_get_mem (nngm->vxlan4_gpe_tunnel_by_key, &key4_1);

		  if (p1 == 0)
		    {
		      error1 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
		      goto trace1;
		    }

		  last_key4.as_u64[0] = key4_1.as_u64[0];
		  last_key4.as_u64[1] = key4_1.as_u64[1];
		  tunnel_index1 = last_tunnel_index = p1[0];
		}
	      else
		tunnel_index1 = last_tunnel_index;
	    }
	  else			/* is_ip6 */
	    {
	      /* Processing for key6_1 */
	      if (PREDICT_FALSE
		  (memcmp (&key6_1, &last_key6, sizeof (last_key6)) != 0))
		{
		  p1 = hash_get_mem (nngm->vxlan6_gpe_tunnel_by_key, &key6_1);

		  if (p1 == 0)
		    {
		      error1 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
		      goto trace1;
		    }

		  memcpy (&last_key6, &key6_1, sizeof (key6_1));
		  tunnel_index1 = last_tunnel_index = p1[0];
		}
	      else
		tunnel_index1 = last_tunnel_index;
	    }

	  t1 = pool_elt_at_index (nngm->tunnels, tunnel_index1);

	  sw_if_index1 = t1->sw_if_index;
	  len1 = vlib_buffer_length_in_chain (vm, b1);

	  /* Required to make the l2 tag push / pop code work on l2 subifs */
	  vnet_update_l2_len (b1);

	  /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */
	  vnet_buffer (b1)->sw_if_index[VLIB_RX] = t1->sw_if_index;

	  /*
	   * ip[46] lookup in the configured FIB
	   */
	  vnet_buffer (b1)->sw_if_index[VLIB_TX] = t1->decap_fib_index;

	  pkts_decapsulated++;
	  stats_n_packets += 1;
	  stats_n_bytes += len1;

	  /* Batch stats increment on the same vxlan tunnel so counter
	     is not incremented per packet */
	  if (PREDICT_FALSE (sw_if_index1 != stats_sw_if_index))
	    {
	      stats_n_packets -= 1;
	      stats_n_bytes -= len1;
	      if (stats_n_packets)
		vlib_increment_combined_counter (im->combined_sw_if_counters +
						 VNET_INTERFACE_COUNTER_RX,
						 thread_index,
						 stats_sw_if_index,
						 stats_n_packets,
						 stats_n_bytes);
	      stats_n_packets = 1;
	      stats_n_bytes = len1;
	      stats_sw_if_index = sw_if_index1;
	    }
	  vnet_buffer (b1)->sw_if_index[VLIB_TX] = t1->decap_fib_index;

	trace1:b1->error = error1 ? node->errors[error1] : 0;

	  if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
	    {
	      vxlan_gpe_rx_trace_t *tr =
		vlib_add_trace (vm, node, b1, sizeof (*tr));
	      tr->next_index = next1;
	      tr->error = error1;
	      tr->tunnel_index = tunnel_index1;
	    }

	  vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
					   n_left_to_next, bi0, bi1, next0,
					   next1);
	}

      while (n_left_from > 0 && n_left_to_next > 0)
	{
	  u32 bi0;
	  vlib_buffer_t *b0;
	  u32 next0;
	  ip4_vxlan_gpe_header_t *iuvn4_0;
	  ip6_vxlan_gpe_header_t *iuvn6_0;
	  uword *p0;
	  u32 tunnel_index0;
	  vxlan_gpe_tunnel_t *t0;
	  vxlan4_gpe_tunnel_key_t key4_0;
	  vxlan6_gpe_tunnel_key_t key6_0;
	  u32 error0;
	  u32 sw_if_index0, len0;

	  bi0 = from[0];
	  to_next[0] = bi0;
	  from += 1;
	  to_next += 1;
	  n_left_from -= 1;
	  n_left_to_next -= 1;

	  b0 = vlib_get_buffer (vm, bi0);

	  if (is_ip4)
	    {
	      /* udp leaves current_data pointing at the vxlan-gpe header */
	      vlib_buffer_advance (b0,
				   -(word) (sizeof (udp_header_t) +
					    sizeof (ip4_header_t)));

	      iuvn4_0 = vlib_buffer_get_current (b0);

	      /* pop (ip, udp, vxlan) */
	      vlib_buffer_advance (b0, sizeof (*iuvn4_0));
	    }
	  else
	    {
	      /* udp leaves current_data pointing at the vxlan-gpe header */
	      vlib_buffer_advance (b0,
				   -(word) (sizeof (udp_header_t) +
					    sizeof (ip6_header_t)));

	      iuvn6_0 = vlib_buffer_get_current (b0);

	      /* pop (ip, udp, vxlan) */
	      vlib_buffer_advance (b0, sizeof (*iuvn6_0));
	    }

	  tunnel_index0 = ~0;
	  error0 = 0;

	  if (is_ip4)
	    {
	      next0 =
		(iuvn4_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
		nngm->decap_next_node_list[iuvn4_0->vxlan.protocol] :
		VXLAN_GPE_INPUT_NEXT_DROP;

	      key4_0.local = iuvn4_0->ip4.dst_address.as_u32;
	      key4_0.remote = iuvn4_0->ip4.src_address.as_u32;
	      key4_0.vni = iuvn4_0->vxlan.vni_res;
	      key4_0.pad = 0;

	      /* Processing for key4_0 */
	      if (PREDICT_FALSE ((key4_0.as_u64[0] != last_key4.as_u64[0])
				 || (key4_0.as_u64[1] !=
				     last_key4.as_u64[1])))
		{
		  p0 = hash_get_mem (nngm->vxlan4_gpe_tunnel_by_key, &key4_0);

		  if (p0 == 0)
		    {
		      error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
		      goto trace00;
		    }

		  last_key4.as_u64[0] = key4_0.as_u64[0];
		  last_key4.as_u64[1] = key4_0.as_u64[1];
		  tunnel_index0 = last_tunnel_index = p0[0];
		}
	      else
		tunnel_index0 = last_tunnel_index;
	    }
	  else			/* is_ip6 */
	    {
	      next0 =
		(iuvn6_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
		nngm->decap_next_node_list[iuvn6_0->vxlan.protocol] :
		VXLAN_GPE_INPUT_NEXT_DROP;

	      key6_0.local.as_u64[0] = iuvn6_0->ip6.dst_address.as_u64[0];
	      key6_0.local.as_u64[1] = iuvn6_0->ip6.dst_address.as_u64[1];
	      key6_0.remote.as_u64[0] = iuvn6_0->ip6.src_address.as_u64[0];
	      key6_0.remote.as_u64[1] = iuvn6_0->ip6.src_address.as_u64[1];
	      key6_0.vni = iuvn6_0->vxlan.vni_res;

	      /* Processing for key6_0 */
	      if (PREDICT_FALSE
		  (memcmp (&key6_0, &last_key6, sizeof (last_key6)) != 0))
		{
		  p0 = hash_get_mem (nngm->vxlan6_gpe_tunnel_by_key, &key6_0);

		  if (p0 == 0)
		    {
		      error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
		      goto trace00;
		    }

		  memcpy (&last_key6, &key6_0, sizeof (key6_0));
		  tunnel_index0 = last_tunnel_index = p0[0];
		}
	      else
		tunnel_index0 = last_tunnel_index;
	    }

	  t0 = pool_elt_at_index (nngm->tunnels, tunnel_index0);


	  sw_if_index0 = t0->sw_if_index;
	  len0 = vlib_buffer_length_in_chain (vm, b0);

	  /* Required to make the l2 tag push / pop code work on l2 subifs */
	  vnet_update_l2_len (b0);

	  /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */
	  vnet_buffer (b0)->sw_if_index[VLIB_RX] = t0->sw_if_index;

	  /*
	   * ip[46] lookup in the configured FIB
	   */
	  vnet_buffer (b0)->sw_if_index[VLIB_TX] = t0->decap_fib_index;

	  pkts_decapsulated++;
	  stats_n_packets += 1;
	  stats_n_bytes += len0;

	  /* Batch stats increment on the same vxlan-gpe tunnel so counter
	     is not incremented per packet */
	  if (PREDICT_FALSE (sw_if_index0 != stats_sw_if_index))
	    {
	      stats_n_packets -= 1;
	      stats_n_bytes -= len0;
	      if (stats_n_packets)
		vlib_increment_combined_counter (im->combined_sw_if_counters +
						 VNET_INTERFACE_COUNTER_RX,
						 thread_index,
						 stats_sw_if_index,
						 stats_n_packets,
						 stats_n_bytes);
	      stats_n_packets = 1;
	      stats_n_bytes = len0;
	      stats_sw_if_index = sw_if_index0;
	    }

	trace00:b0->error = error0 ? node->errors[error0] : 0;

	  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
	    {
	      vxlan_gpe_rx_trace_t *tr =
		vlib_add_trace (vm, node, b0, sizeof (*tr));
	      tr->next_index = next0;
	      tr->error = error0;
	      tr->tunnel_index = tunnel_index0;
	    }
	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
					   n_left_to_next, bi0, next0);
	}

      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
    }
  vlib_node_increment_counter (vm, vxlan_gpe_input_node.index,
			       VXLAN_GPE_ERROR_DECAPSULATED,
			       pkts_decapsulated);
  /* Increment any remaining batch stats */
  if (stats_n_packets)
    {
      vlib_increment_combined_counter (im->combined_sw_if_counters +
				       VNET_INTERFACE_COUNTER_RX,
				       thread_index, stats_sw_if_index,
				       stats_n_packets, stats_n_bytes);
      node->runtime_data[0] = stats_sw_if_index;
    }
  return from_frame->n_vectors;
}

/**
 * @brief Graph processing dispatch function for IPv4 VXLAN GPE
 *
 * @node vxlan4-gpe-input
 * @param *vm
 * @param *node
 * @param *from_frame
 *
 * @return from_frame->n_vectors
 *
 */
static uword
vxlan4_gpe_input (vlib_main_t * vm, vlib_node_runtime_t * node,
		  vlib_frame_t * from_frame)
{
  return vxlan_gpe_input (vm, node, from_frame, /* is_ip4 */ 1);
}


void
vxlan_gpe_register_decap_protocol (u8 protocol_id, uword next_node_index)
{
  vxlan_gpe_main_t *hm = &vxlan_gpe_main;
  hm->decap_next_node_list[protocol_id] = next_node_index;
  return;
}

void
vxlan_gpe_unregister_decap_protocol (u8 protocol_id, uword next_node_index)
{
  vxlan_gpe_main_t *hm = &vxlan_gpe_main;
  hm->decap_next_node_list[protocol_id] = VXLAN_GPE_INPUT_NEXT_DROP;
  return;
}


/**
 * @brief Graph processing dispatch function for IPv6 VXLAN GPE
 *
 * @node vxlan6-gpe-input
 * @param *vm
 * @param *node
 * @param *from_frame
 *
 * @return from_frame->n_vectors - uword
 *
 */
static uword
vxlan6_gpe_input (vlib_main_t * vm, vlib_node_runtime_t * node,
		  vlib_frame_t * from_frame)
{
  return vxlan_gpe_input (vm, node, from_frame, /* is_ip4 */ 0);
}

/**
 * @brief VXLAN GPE error strings
 */
static char *vxlan_gpe_error_strings[] = {
#define vxlan_gpe_error(n,s) s,
#include <vnet/vxlan-gpe/vxlan_gpe_error.def>
#undef vxlan_gpe_error
#undef _
};

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (vxlan4_gpe_input_node) = {
  .function = vxlan4_gpe_input,
  .name = "vxlan4-gpe-input",
  /* Takes a vector of packets. */
  .vector_size = sizeof (u32),
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = ARRAY_LEN(vxlan_gpe_error_strings),
  .error_strings = vxlan_gpe_error_strings,

  .n_next_nodes = VXLAN_GPE_INPUT_N_NEXT,
  .next_nodes = {
#define _(s,n) [VXLAN_GPE_INPUT_NEXT_##s] = n,
    foreach_vxlan_gpe_input_next
#undef _
  },

  .format_buffer = format_vxlan_gpe_with_length,
  .format_trace = format_vxlan_gpe_rx_trace,
  // $$$$ .unformat_buffer = unformat_vxlan_gpe_header,
};
/* *INDENT-ON* */

VLIB_NODE_FUNCTION_MULTIARCH (vxlan4_gpe_input_node, vxlan4_gpe_input);

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (vxlan6_gpe_input_node) = {
  .function = vxlan6_gpe_input,
  .name = "vxlan6-gpe-input",
  /* Takes a vector of packets. */
  .vector_size = sizeof (u32),
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = ARRAY_LEN(vxlan_gpe_error_strings),
  .error_strings = vxlan_gpe_error_strings,

  .n_next_nodes = VXLAN_GPE_INPUT_N_NEXT,
  .next_nodes = {
#define _(s,n) [VXLAN_GPE_INPUT_NEXT_##s] = n,
    foreach_vxlan_gpe_input_next
#undef _
  },

  .format_buffer = format_vxlan_gpe_with_length,
  .format_trace = format_vxlan_gpe_rx_trace,
  // $$$$ .unformat_buffer = unformat_vxlan_gpe_header,
};
/* *INDENT-ON* */

VLIB_NODE_FUNCTION_MULTIARCH (vxlan6_gpe_input_node, vxlan6_gpe_input);
typedef enum
{
  IP_VXLAN_BYPASS_NEXT_DROP,
  IP_VXLAN_BYPASS_NEXT_VXLAN,
  IP_VXLAN_BYPASS_N_NEXT,
} ip_vxan_bypass_next_t;

always_inline uword
ip_vxlan_gpe_bypass_inline (vlib_main_t * vm,
			    vlib_node_runtime_t * node,
			    vlib_frame_t * frame, u32 is_ip4)
{
  vxlan_gpe_main_t *ngm = &vxlan_gpe_main;
  u32 *from, *to_next, n_left_from, n_left_to_next, next_index;
  vlib_node_runtime_t *error_node =
    vlib_node_get_runtime (vm, ip4_input_node.index);
  ip4_address_t addr4;		/* last IPv4 address matching a local VTEP address */
  ip6_address_t addr6;		/* last IPv6 address matching a local VTEP address */

  from = vlib_frame_vector_args (frame);
  n_left_from = frame->n_vectors;
  next_index = node->cached_next_index;

  if (node->flags & VLIB_NODE_FLAG_TRACE)
    ip4_forward_next_trace (vm, node, frame, VLIB_TX);

  if (is_ip4)
    addr4.data_u32 = ~0;
  else
    ip6_address_set_zero (&addr6);

  while (n_left_from > 0)
    {
      vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);

      while (n_left_from >= 4 && n_left_to_next >= 2)
	{
	  vlib_buffer_t *b0, *b1;
	  ip4_header_t *ip40, *ip41;
	  ip6_header_t *ip60, *ip61;
	  udp_header_t *udp0, *udp1;
	  u32 bi0, ip_len0, udp_len0, flags0, next0;
	  u32 bi1, ip_len1, udp_len1, flags1, next1;
	  i32 len_diff0, len_diff1;
	  u8 error0, good_udp0, proto0;
	  u8 error1, good_udp1, proto1;

	  /* 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);

	    CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
	    CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
	  }

	  bi0 = to_next[0] = from[0];
	  bi1 = to_next[1] = from[1];
	  from += 2;
	  n_left_from -= 2;
	  to_next += 2;
	  n_left_to_next -= 2;

	  b0 = vlib_get_buffer (vm, bi0);
	  b1 = vlib_get_buffer (vm, bi1);
	  if (is_ip4)
	    {
	      ip40 = vlib_buffer_get_current (b0);
	      ip41 = vlib_buffer_get_current (b1);
	    }
	  else
	    {
	      ip60 = vlib_buffer_get_current (b0);
	      ip61 = vlib_buffer_get_current (b1);
	    }

	  /* Setup packet for next IP feature */
	  vnet_feature_next (vnet_buffer (b0)->sw_if_index[VLIB_RX], &next0,
			     b0);
	  vnet_feature_next (vnet_buffer (b1)->sw_if_index[VLIB_RX], &next1,
			     b1);

	  if (is_ip4)
	    {
	      proto0 = ip40->protocol;
	      proto1 = ip41->protocol;
	    }
	  else
	    {
	      proto0 = ip60->protocol;
	      proto1 = ip61->protocol;
	    }

	  /* Process packet 0 */
	  if (proto0 != IP_PROTOCOL_UDP)
	    goto exit0;		/* not UDP packet */

	  if (is_ip4)
	    udp0 = ip4_next_header (ip40);
	  else
	    udp0 = ip6_next_header (ip60);

	  if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_VXLAN_GPE))
	    goto exit0;		/* not VXLAN packet */

	  /* Validate DIP against VTEPs */
	  if (is_ip4)
	    {
	      if (addr4.as_u32 != ip40->dst_address.as_u32)
		{
		  if (!hash_get (ngm->vtep4, ip40->dst_address.as_u32))
		    goto exit0;	/* no local VTEP for VXLAN packet */
		  addr4 = ip40->dst_address;
		}
	    }
	  else
	    {
	      if (!ip6_address_is_equal (&addr6, &ip60->dst_address))
		{
		  if (!hash_get_mem (ngm->vtep6, &ip60->dst_address))
		    goto exit0;	/* no local VTEP for VXLAN packet */
		  addr6 = ip60->dst_address;
		}
	    }

	  flags0 = b0->flags;
	  good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;

	  /* Don't verify UDP checksum for packets with explicit zero checksum. */
	  good_udp0 |= udp0->checksum == 0;

	  /* Verify UDP length */
	  if (is_ip4)
	    ip_len0 = clib_net_to_host_u16 (ip40->length);
	  else
	    ip_len0 = clib_net_to_host_u16 (ip60->payload_length);
	  udp_len0 = clib_net_to_host_u16 (udp0->length);
	  len_diff0 = ip_len0 - udp_len0;

	  /* Verify UDP checksum */
	  if (PREDICT_FALSE (!good_udp0))
	    {
	      if ((flags0 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0)
		{
		  if (is_ip4)
		    flags0 = ip4_tcp_udp_validate_checksum (vm, b0);
		  else
		    flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, b0);
		  good_udp0 =
		    (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
		}
	    }

	  if (is_ip4)
	    {
	      error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM;
	      error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH;
	    }
	  else
	    {
	      error0 = good_udp0 ? 0 : IP6_ERROR_UDP_CHECKSUM;
	      error0 = (len_diff0 >= 0) ? error0 : IP6_ERROR_UDP_LENGTH;
	    }

	  next0 = error0 ?
	    IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
	  b0->error = error0 ? error_node->errors[error0] : 0;

	  /* vxlan_gpe-input node expect current at VXLAN header */
	  if (is_ip4)
	    vlib_buffer_advance (b0,
				 sizeof (ip4_header_t) +
				 sizeof (udp_header_t));
	  else
	    vlib_buffer_advance (b0,
				 sizeof (ip6_header_t) +
				 sizeof (udp_header_t));

	exit0:
	  /* Process packet 1 */
	  if (proto1 != IP_PROTOCOL_UDP)
	    goto exit1;		/* not UDP packet */

	  if (is_ip4)
	    udp1 = ip4_next_header (ip41);
	  else
	    udp1 = ip6_next_header (ip61);

	  if (udp1->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_VXLAN_GPE))
	    goto exit1;		/* not VXLAN packet */

	  /* Validate DIP against VTEPs */
	  if (is_ip4)
	    {
	      if (addr4.as_u32 != ip41->dst_address.as_u32)
		{
		  if (!hash_get (ngm->vtep4, ip41->dst_address.as_u32))
		    goto exit1;	/* no local VTEP for VXLAN packet */
		  addr4 = ip41->dst_address;
		}
	    }
	  else
	    {
	      if (!ip6_address_is_equal (&addr6, &ip61->dst_address))
		{
		  if (!hash_get_mem (ngm->vtep6, &ip61->dst_address))
		    goto exit1;	/* no local VTEP for VXLAN packet */
		  addr6 = ip61->dst_address;
		}
	    }

	  flags1 = b1->flags;
	  good_udp1 = (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;

	  /* Don't verify UDP checksum for packets with explicit zero checksum. */
	  good_udp1 |= udp1->checksum == 0;

	  /* Verify UDP length */
	  if (is_ip4)
	    ip_len1 = clib_net_to_host_u16 (ip41->length);
	  else
	    ip_len1 = clib_net_to_host_u16 (ip61->payload_length);
	  udp_len1 = clib_net_to_host_u16 (udp1->length);
	  len_diff1 = ip_len1 - udp_len1;

	  /* Verify UDP checksum */
	  if (PREDICT_FALSE (!good_udp1))
	    {
	      if ((flags1 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0)
		{
		  if (is_ip4)
		    flags1 = ip4_tcp_udp_validate_checksum (vm, b1);
		  else
		    flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, b1);
		  good_udp1 =
		    (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
		}
	    }

	  if (is_ip4)
	    {
	      error1 = good_udp1 ? 0 : IP4_ERROR_UDP_CHECKSUM;
	      error1 = (len_diff1 >= 0) ? error1 : IP4_ERROR_UDP_LENGTH;
	    }
	  else
	    {
	      error1 = good_udp1 ? 0 : IP6_ERROR_UDP_CHECKSUM;
	      error1 = (len_diff1 >= 0) ? error1 : IP6_ERROR_UDP_LENGTH;
	    }

	  next1 = error1 ?
	    IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
	  b1->error = error1 ? error_node->errors[error1] : 0;

	  /* vxlan_gpe-input node expect current at VXLAN header */
	  if (is_ip4)
	    vlib_buffer_advance (b1,
				 sizeof (ip4_header_t) +
				 sizeof (udp_header_t));
	  else
	    vlib_buffer_advance (b1,
				 sizeof (ip6_header_t) +
				 sizeof (udp_header_t));

	exit1:
	  vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
					   to_next, n_left_to_next,
					   bi0, bi1, next0, next1);
	}

      while (n_left_from > 0 && n_left_to_next > 0)
	{
	  vlib_buffer_t *b0;
	  ip4_header_t *ip40;
	  ip6_header_t *ip60;
	  udp_header_t *udp0;
	  u32 bi0, ip_len0, udp_len0, flags0, next0;
	  i32 len_diff0;
	  u8 error0, good_udp0, proto0;

	  bi0 = to_next[0] = from[0];
	  from += 1;
	  n_left_from -= 1;
	  to_next += 1;
	  n_left_to_next -= 1;

	  b0 = vlib_get_buffer (vm, bi0);
	  if (is_ip4)
	    ip40 = vlib_buffer_get_current (b0);
	  else
	    ip60 = vlib_buffer_get_current (b0);

	  /* Setup packet for next IP feature */
	  vnet_feature_next (vnet_buffer (b0)->sw_if_index[VLIB_RX], &next0,
			     b0);

	  if (is_ip4)
	    proto0 = ip40->protocol;
	  else
	    proto0 = ip60->protocol;

	  if (proto0 != IP_PROTOCOL_UDP)
	    goto exit;		/* not UDP packet */

	  if (is_ip4)
	    udp0 = ip4_next_header (ip40);
	  else
	    udp0 = ip6_next_header (ip60);

	  if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_VXLAN_GPE))
	    goto exit;		/* not VXLAN packet */

	  /* Validate DIP against VTEPs */
	  if (is_ip4)
	    {
	      if (addr4.as_u32 != ip40->dst_address.as_u32)
		{
		  if (!hash_get (ngm->vtep4, ip40->dst_address.as_u32))
		    goto exit;	/* no local VTEP for VXLAN packet */
		  addr4 = ip40->dst_address;
		}
	    }
	  else
	    {
	      if (!ip6_address_is_equal (&addr6, &ip60->dst_address))
		{
		  if (!hash_get_mem (ngm->vtep6, &ip60->dst_address))
		    goto exit;	/* no local VTEP for VXLAN packet */
		  addr6 = ip60->dst_address;
		}
	    }

	  flags0 = b0->flags;
	  good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;

	  /* Don't verify UDP checksum for packets with explicit zero checksum. */
	  good_udp0 |= udp0->checksum == 0;

	  /* Verify UDP length */
	  if (is_ip4)
	    ip_len0 = clib_net_to_host_u16 (ip40->length);
	  else
	    ip_len0 = clib_net_to_host_u16 (ip60->payload_length);
	  udp_len0 = clib_net_to_host_u16 (udp0->length);
	  len_diff0 = ip_len0 - udp_len0;

	  /* Verify UDP checksum */
	  if (PREDICT_FALSE (!good_udp0))
	    {
	      if ((flags0 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0)
		{
		  if (is_ip4)
		    flags0 = ip4_tcp_udp_validate_checksum (vm, b0);
		  else
		    flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, b0);
		  good_udp0 =
		    (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
		}
	    }

	  if (is_ip4)
	    {
	      error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM;
	      error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH;
	    }
	  else
	    {
	      error0 = good_udp0 ? 0 : IP6_ERROR_UDP_CHECKSUM;
	      error0 = (len_diff0 >= 0) ? error0 : IP6_ERROR_UDP_LENGTH;
	    }

	  next0 = error0 ?
	    IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
	  b0->error = error0 ? error_node->errors[error0] : 0;

	  /* vxlan_gpe-input node expect current at VXLAN header */
	  if (is_ip4)
	    vlib_buffer_advance (b0,
				 sizeof (ip4_header_t) +
				 sizeof (udp_header_t));
	  else
	    vlib_buffer_advance (b0,
				 sizeof (ip6_header_t) +
				 sizeof (udp_header_t));

	exit:
	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
					   to_next, n_left_to_next,
					   bi0, next0);
	}

      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
    }

  return frame->n_vectors;
}

static uword
ip4_vxlan_gpe_bypass (vlib_main_t * vm,
		      vlib_node_runtime_t * node, vlib_frame_t * frame)
{
  return ip_vxlan_gpe_bypass_inline (vm, node, frame, /* is_ip4 */ 1);
}

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ip4_vxlan_gpe_bypass_node) = {
  .function = ip4_vxlan_gpe_bypass,
  .name = "ip4-vxlan-gpe-bypass",
  .vector_size = sizeof (u32),

  .n_next_nodes = IP_VXLAN_BYPASS_N_NEXT,
  .next_nodes = {
    [IP_VXLAN_BYPASS_NEXT_DROP] = "error-drop",
    [IP_VXLAN_BYPASS_NEXT_VXLAN] = "vxlan4-gpe-input",
  },

  .format_buffer = format_ip4_header,
  .format_trace = format_ip4_forward_next_trace,
};
/* *INDENT-ON* */

VLIB_NODE_FUNCTION_MULTIARCH (ip4_vxlan_gpe_bypass_node, ip4_vxlan_gpe_bypass)
/* Dummy init function to get us linked in. */
     clib_error_t *ip4_vxlan_gpe_bypass_init (vlib_main_t * vm)
{
  return 0;
}

VLIB_INIT_FUNCTION (ip4_vxlan_gpe_bypass_init);

static uword
ip6_vxlan_gpe_bypass (vlib_main_t * vm,
		      vlib_node_runtime_t * node, vlib_frame_t * frame)
{
  return ip_vxlan_gpe_bypass_inline (vm, node, frame, /* is_ip4 */ 0);
}

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ip6_vxlan_gpe_bypass_node) = {
  .function = ip6_vxlan_gpe_bypass,
  .name = "ip6-vxlan-gpe-bypass",
  .vector_size = sizeof (u32),

  .n_next_nodes = IP_VXLAN_BYPASS_N_NEXT,
  .next_nodes = {
    [IP_VXLAN_BYPASS_NEXT_DROP] = "error-drop",
    [IP_VXLAN_BYPASS_NEXT_VXLAN] = "vxlan6-gpe-input",
  },

  .format_buffer = format_ip6_header,
  .format_trace = format_ip6_forward_next_trace,
};
/* *INDENT-ON* */

VLIB_NODE_FUNCTION_MULTIARCH (ip6_vxlan_gpe_bypass_node, ip6_vxlan_gpe_bypass)
/* Dummy init function to get us linked in. */
     clib_error_t *ip6_vxlan_gpe_bypass_init (vlib_main_t * vm)
{
  return 0;
}

VLIB_INIT_FUNCTION (ip6_vxlan_gpe_bypass_init);

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */