src/vnet/vxlan-gpe/decap.c

   1 /*
   2  * decap.c - decapsulate VXLAN GPE
   3  *
   4  * Copyright (c) 2013 Cisco and/or its affiliates.
   5  * Licensed under the Apache License, Version 2.0 (the "License");
   6  * you may not use this file except in compliance with the License.
   7  * You may obtain a copy of the License at:
   8  *
   9  *     http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  * Unless required by applicable law or agreed to in writing, software
  12  * distributed under the License is distributed on an "AS IS" BASIS,
  13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  * See the License for the specific language governing permissions and
  15  * limitations under the License.
  16  */
  17 /**
  18  *  @file
  19  *  @brief Functions for decapsulating VXLAN GPE tunnels
  20  *
  21 */
  22
  23 #include <vlib/vlib.h>
  24 #include <vnet/pg/pg.h>
  25 #include <vnet/vxlan-gpe/vxlan_gpe.h>
  26
  27 vlib_node_registration_t vxlan_gpe_input_node;
  28
  29 /**
  30  * @brief Struct for VXLAN GPE decap packet tracing
  31  *
  32  */
  33 typedef struct
  34 {
  35   u32 next_index;
  36   u32 tunnel_index;
  37   u32 error;
  38 } vxlan_gpe_rx_trace_t;
  39
  40 /**
  41  * @brief Tracing function for VXLAN GPE packet decapsulation
  42  *
  43  * @param *s
  44  * @param *args
  45  *
  46  * @return *s
  47  *
  48  */
  49 static u8 *
  50 format_vxlan_gpe_rx_trace (u8 * s, va_list * args)
  51 {
  52   CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
  53   CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
  54   vxlan_gpe_rx_trace_t *t = va_arg (*args, vxlan_gpe_rx_trace_t *);
  55
  56   if (t->tunnel_index != ~0)
  57     {
  58       s = format (s, "VXLAN-GPE: tunnel %d next %d error %d", t->tunnel_index,
  59                   t->next_index, t->error);
  60     }
  61   else
  62     {
  63       s = format (s, "VXLAN-GPE: no tunnel next %d error %d\n", t->next_index,
  64                   t->error);
  65     }
  66   return s;
  67 }
  68
  69 /**
  70  * @brief Tracing function for VXLAN GPE packet decapsulation including length
  71  *
  72  * @param *s
  73  * @param *args
  74  *
  75  * @return *s
  76  *
  77  */
  78 static u8 *
  79 format_vxlan_gpe_with_length (u8 * s, va_list * args)
  80 {
  81   CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
  82   CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
  83
  84
  85   return s;
  86 }
  87
  88 /**
  89  * @brief Common processing for IPv4 and IPv6 VXLAN GPE decap dispatch functions
  90  *
  91  * It is worth noting that other than trivial UDP forwarding (transit), VXLAN GPE
  92  * tunnels are "terminate local". This means that there is no "TX" interface for this
  93  * decap case, so that field in the buffer_metadata can be "used for something else".
  94  * The something else in this case is, for the IPv4/IPv6 inner-packet type case, the
  95  * FIB index used to look up the inner-packet's adjacency.
  96  *
  97  *      vnet_buffer(b0)->sw_if_index[VLIB_TX] = t0->decap_fib_index;
  98  *
  99  * @param *vm
 100  * @param *node
 101  * @param *from_frame
 102  * @param is_ip4
 103  *
 104  * @return from_frame->n_vectors
 105  *
 106  */
 107 always_inline uword
 108 vxlan_gpe_input (vlib_main_t * vm,
 109                  vlib_node_runtime_t * node,
 110                  vlib_frame_t * from_frame, u8 is_ip4)
 111 {
 112   u32 n_left_from, next_index, *from, *to_next;
 113   vxlan_gpe_main_t *nngm = &vxlan_gpe_main;
 114   vnet_main_t *vnm = nngm->vnet_main;
 115   vnet_interface_main_t *im = &vnm->interface_main;
 116   u32 last_tunnel_index = ~0;
 117   vxlan4_gpe_tunnel_key_t last_key4;
 118   vxlan6_gpe_tunnel_key_t last_key6;
 119   u32 pkts_decapsulated = 0;
 120   u32 thread_index = vlib_get_thread_index ();
 121   u32 stats_sw_if_index, stats_n_packets, stats_n_bytes;
 122
 123   if (is_ip4)
 124     memset (&last_key4, 0xff, sizeof (last_key4));
 125   else
 126     memset (&last_key6, 0xff, sizeof (last_key6));
 127
 128   from = vlib_frame_vector_args (from_frame);
 129   n_left_from = from_frame->n_vectors;
 130
 131   next_index = node->cached_next_index;
 132   stats_sw_if_index = node->runtime_data[0];
 133   stats_n_packets = stats_n_bytes = 0;
 134
 135   while (n_left_from > 0)
 136     {
 137       u32 n_left_to_next;
 138
 139       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
 140
 141       while (n_left_from >= 4 && n_left_to_next >= 2)
 142         {
 143           u32 bi0, bi1;
 144           vlib_buffer_t *b0, *b1;
 145           u32 next0, next1;
 146           ip4_vxlan_gpe_header_t *iuvn4_0, *iuvn4_1;
 147           ip6_vxlan_gpe_header_t *iuvn6_0, *iuvn6_1;
 148           uword *p0, *p1;
 149           u32 tunnel_index0, tunnel_index1;
 150           vxlan_gpe_tunnel_t *t0, *t1;
 151           vxlan4_gpe_tunnel_key_t key4_0, key4_1;
 152           vxlan6_gpe_tunnel_key_t key6_0, key6_1;
 153           u32 error0, error1;
 154           u32 sw_if_index0, sw_if_index1, len0, len1;
 155
 156           /* Prefetch next iteration. */
 157           {
 158             vlib_buffer_t *p2, *p3;
 159
 160             p2 = vlib_get_buffer (vm, from[2]);
 161             p3 = vlib_get_buffer (vm, from[3]);
 162
 163             vlib_prefetch_buffer_header (p2, LOAD);
 164             vlib_prefetch_buffer_header (p3, LOAD);
 165
 166             CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
 167             CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
 168           }
 169
 170           bi0 = from[0];
 171           bi1 = from[1];
 172           to_next[0] = bi0;
 173           to_next[1] = bi1;
 174           from += 2;
 175           to_next += 2;
 176           n_left_to_next -= 2;
 177           n_left_from -= 2;
 178
 179           b0 = vlib_get_buffer (vm, bi0);
 180           b1 = vlib_get_buffer (vm, bi1);
 181
 182           if (is_ip4)
 183             {
 184               /* udp leaves current_data pointing at the vxlan-gpe header */
 185               vlib_buffer_advance (b0,
 186                                    -(word) (sizeof (udp_header_t) +
 187                                             sizeof (ip4_header_t)));
 188               vlib_buffer_advance (b1,
 189                                    -(word) (sizeof (udp_header_t) +
 190                                             sizeof (ip4_header_t)));
 191
 192               iuvn4_0 = vlib_buffer_get_current (b0);
 193               iuvn4_1 = vlib_buffer_get_current (b1);
 194
 195               /* pop (ip, udp, vxlan) */
 196               vlib_buffer_advance (b0, sizeof (*iuvn4_0));
 197               vlib_buffer_advance (b1, sizeof (*iuvn4_1));
 198             }
 199           else
 200             {
 201               /* udp leaves current_data pointing at the vxlan-gpe header */
 202               vlib_buffer_advance (b0,
 203                                    -(word) (sizeof (udp_header_t) +
 204                                             sizeof (ip6_header_t)));
 205               vlib_buffer_advance (b1,
 206                                    -(word) (sizeof (udp_header_t) +
 207                                             sizeof (ip6_header_t)));
 208
 209               iuvn6_0 = vlib_buffer_get_current (b0);
 210               iuvn6_1 = vlib_buffer_get_current (b1);
 211
 212               /* pop (ip, udp, vxlan) */
 213               vlib_buffer_advance (b0, sizeof (*iuvn6_0));
 214               vlib_buffer_advance (b1, sizeof (*iuvn6_1));
 215             }
 216
 217           tunnel_index0 = ~0;
 218           tunnel_index1 = ~0;
 219           error0 = 0;
 220           error1 = 0;
 221
 222           if (is_ip4)
 223             {
 224               next0 =
 225                 (iuvn4_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
 226                 nngm->decap_next_node_list[iuvn4_0->vxlan.protocol] :
 227                 VXLAN_GPE_INPUT_NEXT_DROP;
 228               next1 =
 229                 (iuvn4_1->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
 230                 nngm->decap_next_node_list[iuvn4_1->vxlan.protocol] :
 231                 VXLAN_GPE_INPUT_NEXT_DROP;
 232
 233               key4_0.local = iuvn4_0->ip4.dst_address.as_u32;
 234               key4_1.local = iuvn4_1->ip4.dst_address.as_u32;
 235
 236               key4_0.remote = iuvn4_0->ip4.src_address.as_u32;
 237               key4_1.remote = iuvn4_1->ip4.src_address.as_u32;
 238
 239               key4_0.vni = iuvn4_0->vxlan.vni_res;
 240               key4_1.vni = iuvn4_1->vxlan.vni_res;
 241
 242               key4_0.pad = 0;
 243               key4_1.pad = 0;
 244             }
 245           else                  /* is_ip6 */
 246             {
 247               next0 = (iuvn6_0->vxlan.protocol < node->n_next_nodes) ?
 248                 iuvn6_0->vxlan.protocol : VXLAN_GPE_INPUT_NEXT_DROP;
 249               next1 = (iuvn6_1->vxlan.protocol < node->n_next_nodes) ?
 250                 iuvn6_1->vxlan.protocol : VXLAN_GPE_INPUT_NEXT_DROP;
 251
 252               key6_0.local.as_u64[0] = iuvn6_0->ip6.dst_address.as_u64[0];
 253               key6_0.local.as_u64[1] = iuvn6_0->ip6.dst_address.as_u64[1];
 254               key6_1.local.as_u64[0] = iuvn6_1->ip6.dst_address.as_u64[0];
 255               key6_1.local.as_u64[1] = iuvn6_1->ip6.dst_address.as_u64[1];
 256
 257               key6_0.remote.as_u64[0] = iuvn6_0->ip6.src_address.as_u64[0];
 258               key6_0.remote.as_u64[1] = iuvn6_0->ip6.src_address.as_u64[1];
 259               key6_1.remote.as_u64[0] = iuvn6_1->ip6.src_address.as_u64[0];
 260               key6_1.remote.as_u64[1] = iuvn6_1->ip6.src_address.as_u64[1];
 261
 262               key6_0.vni = iuvn6_0->vxlan.vni_res;
 263               key6_1.vni = iuvn6_1->vxlan.vni_res;
 264             }
 265
 266           /* Processing packet 0 */
 267           if (is_ip4)
 268             {
 269               /* Processing for key4_0 */
 270               if (PREDICT_FALSE ((key4_0.as_u64[0] != last_key4.as_u64[0])
 271                                  || (key4_0.as_u64[1] !=
 272                                      last_key4.as_u64[1])))
 273                 {
 274                   p0 = hash_get_mem (nngm->vxlan4_gpe_tunnel_by_key, &key4_0);
 275
 276                   if (p0 == 0)
 277                     {
 278                       error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
 279                       goto trace0;
 280                     }
 281
 282                   last_key4.as_u64[0] = key4_0.as_u64[0];
 283                   last_key4.as_u64[1] = key4_0.as_u64[1];
 284                   tunnel_index0 = last_tunnel_index = p0[0];
 285                 }
 286               else
 287                 tunnel_index0 = last_tunnel_index;
 288             }
 289           else                  /* is_ip6 */
 290             {
 291               next0 =
 292                 (iuvn6_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
 293                 nngm->decap_next_node_list[iuvn6_0->vxlan.protocol] :
 294                 VXLAN_GPE_INPUT_NEXT_DROP;
 295               next1 =
 296                 (iuvn6_1->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
 297                 nngm->decap_next_node_list[iuvn6_1->vxlan.protocol] :
 298                 VXLAN_GPE_INPUT_NEXT_DROP;
 299
 300               key6_0.local.as_u64[0] = iuvn6_0->ip6.dst_address.as_u64[0];
 301               key6_0.local.as_u64[1] = iuvn6_0->ip6.dst_address.as_u64[1];
 302               key6_1.local.as_u64[0] = iuvn6_1->ip6.dst_address.as_u64[0];
 303               key6_1.local.as_u64[1] = iuvn6_1->ip6.dst_address.as_u64[1];
 304
 305               key6_0.remote.as_u64[0] = iuvn6_0->ip6.src_address.as_u64[0];
 306               key6_0.remote.as_u64[1] = iuvn6_0->ip6.src_address.as_u64[1];
 307               key6_1.remote.as_u64[0] = iuvn6_1->ip6.src_address.as_u64[0];
 308               key6_1.remote.as_u64[1] = iuvn6_1->ip6.src_address.as_u64[1];
 309
 310               key6_0.vni = iuvn6_0->vxlan.vni_res;
 311               key6_1.vni = iuvn6_1->vxlan.vni_res;
 312
 313               /* Processing for key6_0 */
 314               if (PREDICT_FALSE
 315                   (memcmp (&key6_0, &last_key6, sizeof (last_key6)) != 0))
 316                 {
 317                   p0 = hash_get_mem (nngm->vxlan6_gpe_tunnel_by_key, &key6_0);
 318
 319                   if (p0 == 0)
 320                     {
 321                       error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
 322                       goto trace0;
 323                     }
 324
 325                   memcpy (&last_key6, &key6_0, sizeof (key6_0));
 326                   tunnel_index0 = last_tunnel_index = p0[0];
 327                 }
 328               else
 329                 tunnel_index0 = last_tunnel_index;
 330             }
 331
 332           t0 = pool_elt_at_index (nngm->tunnels, tunnel_index0);
 333
 334
 335           sw_if_index0 = t0->sw_if_index;
 336           len0 = vlib_buffer_length_in_chain (vm, b0);
 337
 338           /* Required to make the l2 tag push / pop code work on l2 subifs */
 339           vnet_update_l2_len (b0);
 340
 341           /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */
 342           vnet_buffer (b0)->sw_if_index[VLIB_RX] = t0->sw_if_index;
 343
 344       /**
 345        * ip[46] lookup in the configured FIB
 346        */
 347           vnet_buffer (b0)->sw_if_index[VLIB_TX] = t0->decap_fib_index;
 348
 349           pkts_decapsulated++;
 350           stats_n_packets += 1;
 351           stats_n_bytes += len0;
 352
 353           if (PREDICT_FALSE (sw_if_index0 != stats_sw_if_index))
 354             {
 355               stats_n_packets -= 1;
 356               stats_n_bytes -= len0;
 357               if (stats_n_packets)
 358                 vlib_increment_combined_counter (im->combined_sw_if_counters +
 359                                                  VNET_INTERFACE_COUNTER_RX,
 360                                                  thread_index,
 361                                                  stats_sw_if_index,
 362                                                  stats_n_packets,
 363                                                  stats_n_bytes);
 364               stats_n_packets = 1;
 365               stats_n_bytes = len0;
 366               stats_sw_if_index = sw_if_index0;
 367             }
 368
 369         trace0:b0->error = error0 ? node->errors[error0] : 0;
 370
 371           if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
 372             {
 373               vxlan_gpe_rx_trace_t *tr =
 374                 vlib_add_trace (vm, node, b0, sizeof (*tr));
 375               tr->next_index = next0;
 376               tr->error = error0;
 377               tr->tunnel_index = tunnel_index0;
 378             }
 379
 380           /* Process packet 1 */
 381           if (is_ip4)
 382             {
 383               /* Processing for key4_1 */
 384               if (PREDICT_FALSE ((key4_1.as_u64[0] != last_key4.as_u64[0])
 385                                  || (key4_1.as_u64[1] !=
 386                                      last_key4.as_u64[1])))
 387                 {
 388                   p1 = hash_get_mem (nngm->vxlan4_gpe_tunnel_by_key, &key4_1);
 389
 390                   if (p1 == 0)
 391                     {
 392                       error1 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
 393                       goto trace1;
 394                     }
 395
 396                   last_key4.as_u64[0] = key4_1.as_u64[0];
 397                   last_key4.as_u64[1] = key4_1.as_u64[1];
 398                   tunnel_index1 = last_tunnel_index = p1[0];
 399                 }
 400               else
 401                 tunnel_index1 = last_tunnel_index;
 402             }
 403           else                  /* is_ip6 */
 404             {
 405               /* Processing for key6_1 */
 406               if (PREDICT_FALSE
 407                   (memcmp (&key6_1, &last_key6, sizeof (last_key6)) != 0))
 408                 {
 409                   p1 = hash_get_mem (nngm->vxlan6_gpe_tunnel_by_key, &key6_1);
 410
 411                   if (p1 == 0)
 412                     {
 413                       error1 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
 414                       goto trace1;
 415                     }
 416
 417                   memcpy (&last_key6, &key6_1, sizeof (key6_1));
 418                   tunnel_index1 = last_tunnel_index = p1[0];
 419                 }
 420               else
 421                 tunnel_index1 = last_tunnel_index;
 422             }
 423
 424           t1 = pool_elt_at_index (nngm->tunnels, tunnel_index1);
 425
 426           sw_if_index1 = t1->sw_if_index;
 427           len1 = vlib_buffer_length_in_chain (vm, b1);
 428
 429           /* Required to make the l2 tag push / pop code work on l2 subifs */
 430           vnet_update_l2_len (b1);
 431
 432           /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */
 433           vnet_buffer (b1)->sw_if_index[VLIB_RX] = t1->sw_if_index;
 434
 435           /*
 436            * ip[46] lookup in the configured FIB
 437            */
 438           vnet_buffer (b1)->sw_if_index[VLIB_TX] = t1->decap_fib_index;
 439
 440           pkts_decapsulated++;
 441           stats_n_packets += 1;
 442           stats_n_bytes += len1;
 443
 444           /* Batch stats increment on the same vxlan tunnel so counter
 445              is not incremented per packet */
 446           if (PREDICT_FALSE (sw_if_index1 != stats_sw_if_index))
 447             {
 448               stats_n_packets -= 1;
 449               stats_n_bytes -= len1;
 450               if (stats_n_packets)
 451                 vlib_increment_combined_counter (im->combined_sw_if_counters +
 452                                                  VNET_INTERFACE_COUNTER_RX,
 453                                                  thread_index,
 454                                                  stats_sw_if_index,
 455                                                  stats_n_packets,
 456                                                  stats_n_bytes);
 457               stats_n_packets = 1;
 458               stats_n_bytes = len1;
 459               stats_sw_if_index = sw_if_index1;
 460             }
 461           vnet_buffer (b1)->sw_if_index[VLIB_TX] = t1->decap_fib_index;
 462
 463         trace1:b1->error = error1 ? node->errors[error1] : 0;
 464
 465           if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
 466             {
 467               vxlan_gpe_rx_trace_t *tr =
 468                 vlib_add_trace (vm, node, b1, sizeof (*tr));
 469               tr->next_index = next1;
 470               tr->error = error1;
 471               tr->tunnel_index = tunnel_index1;
 472             }
 473
 474           vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
 475                                            n_left_to_next, bi0, bi1, next0,
 476                                            next1);
 477         }
 478
 479       while (n_left_from > 0 && n_left_to_next > 0)
 480         {
 481           u32 bi0;
 482           vlib_buffer_t *b0;
 483           u32 next0;
 484           ip4_vxlan_gpe_header_t *iuvn4_0;
 485           ip6_vxlan_gpe_header_t *iuvn6_0;
 486           uword *p0;
 487           u32 tunnel_index0;
 488           vxlan_gpe_tunnel_t *t0;
 489           vxlan4_gpe_tunnel_key_t key4_0;
 490           vxlan6_gpe_tunnel_key_t key6_0;
 491           u32 error0;
 492           u32 sw_if_index0, len0;
 493
 494           bi0 = from[0];
 495           to_next[0] = bi0;
 496           from += 1;
 497           to_next += 1;
 498           n_left_from -= 1;
 499           n_left_to_next -= 1;
 500
 501           b0 = vlib_get_buffer (vm, bi0);
 502
 503           if (is_ip4)
 504             {
 505               /* udp leaves current_data pointing at the vxlan-gpe header */
 506               vlib_buffer_advance (b0,
 507                                    -(word) (sizeof (udp_header_t) +
 508                                             sizeof (ip4_header_t)));
 509
 510               iuvn4_0 = vlib_buffer_get_current (b0);
 511
 512               /* pop (ip, udp, vxlan) */
 513               vlib_buffer_advance (b0, sizeof (*iuvn4_0));
 514             }
 515           else
 516             {
 517               /* udp leaves current_data pointing at the vxlan-gpe header */
 518               vlib_buffer_advance (b0,
 519                                    -(word) (sizeof (udp_header_t) +
 520                                             sizeof (ip6_header_t)));
 521
 522               iuvn6_0 = vlib_buffer_get_current (b0);
 523
 524               /* pop (ip, udp, vxlan) */
 525               vlib_buffer_advance (b0, sizeof (*iuvn6_0));
 526             }
 527
 528           tunnel_index0 = ~0;
 529           error0 = 0;
 530
 531           if (is_ip4)
 532             {
 533               next0 =
 534                 (iuvn4_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
 535                 nngm->decap_next_node_list[iuvn4_0->vxlan.protocol] :
 536                 VXLAN_GPE_INPUT_NEXT_DROP;
 537
 538               key4_0.local = iuvn4_0->ip4.dst_address.as_u32;
 539               key4_0.remote = iuvn4_0->ip4.src_address.as_u32;
 540               key4_0.vni = iuvn4_0->vxlan.vni_res;
 541               key4_0.pad = 0;
 542
 543               /* Processing for key4_0 */
 544               if (PREDICT_FALSE ((key4_0.as_u64[0] != last_key4.as_u64[0])
 545                                  || (key4_0.as_u64[1] !=
 546                                      last_key4.as_u64[1])))
 547                 {
 548                   p0 = hash_get_mem (nngm->vxlan4_gpe_tunnel_by_key, &key4_0);
 549
 550                   if (p0 == 0)
 551                     {
 552                       error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
 553                       goto trace00;
 554                     }
 555
 556                   last_key4.as_u64[0] = key4_0.as_u64[0];
 557                   last_key4.as_u64[1] = key4_0.as_u64[1];
 558                   tunnel_index0 = last_tunnel_index = p0[0];
 559                 }
 560               else
 561                 tunnel_index0 = last_tunnel_index;
 562             }
 563           else                  /* is_ip6 */
 564             {
 565               next0 =
 566                 (iuvn6_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
 567                 nngm->decap_next_node_list[iuvn6_0->vxlan.protocol] :
 568                 VXLAN_GPE_INPUT_NEXT_DROP;
 569
 570               key6_0.local.as_u64[0] = iuvn6_0->ip6.dst_address.as_u64[0];
 571               key6_0.local.as_u64[1] = iuvn6_0->ip6.dst_address.as_u64[1];
 572               key6_0.remote.as_u64[0] = iuvn6_0->ip6.src_address.as_u64[0];
 573               key6_0.remote.as_u64[1] = iuvn6_0->ip6.src_address.as_u64[1];
 574               key6_0.vni = iuvn6_0->vxlan.vni_res;
 575
 576               /* Processing for key6_0 */
 577               if (PREDICT_FALSE
 578                   (memcmp (&key6_0, &last_key6, sizeof (last_key6)) != 0))
 579                 {
 580                   p0 = hash_get_mem (nngm->vxlan6_gpe_tunnel_by_key, &key6_0);
 581
 582                   if (p0 == 0)
 583                     {
 584                       error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
 585                       goto trace00;
 586                     }
 587
 588                   memcpy (&last_key6, &key6_0, sizeof (key6_0));
 589                   tunnel_index0 = last_tunnel_index = p0[0];
 590                 }
 591               else
 592                 tunnel_index0 = last_tunnel_index;
 593             }
 594
 595           t0 = pool_elt_at_index (nngm->tunnels, tunnel_index0);
 596
 597
 598           sw_if_index0 = t0->sw_if_index;
 599           len0 = vlib_buffer_length_in_chain (vm, b0);
 600
 601           /* Required to make the l2 tag push / pop code work on l2 subifs */
 602           vnet_update_l2_len (b0);
 603
 604           /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */
 605           vnet_buffer (b0)->sw_if_index[VLIB_RX] = t0->sw_if_index;
 606
 607           /*
 608            * ip[46] lookup in the configured FIB
 609            */
 610           vnet_buffer (b0)->sw_if_index[VLIB_TX] = t0->decap_fib_index;
 611
 612           pkts_decapsulated++;
 613           stats_n_packets += 1;
 614           stats_n_bytes += len0;
 615
 616           /* Batch stats increment on the same vxlan-gpe tunnel so counter
 617              is not incremented per packet */
 618           if (PREDICT_FALSE (sw_if_index0 != stats_sw_if_index))
 619             {
 620               stats_n_packets -= 1;
 621               stats_n_bytes -= len0;
 622               if (stats_n_packets)
 623                 vlib_increment_combined_counter (im->combined_sw_if_counters +
 624                                                  VNET_INTERFACE_COUNTER_RX,
 625                                                  thread_index,
 626                                                  stats_sw_if_index,
 627                                                  stats_n_packets,
 628                                                  stats_n_bytes);
 629               stats_n_packets = 1;
 630               stats_n_bytes = len0;
 631               stats_sw_if_index = sw_if_index0;
 632             }
 633
 634         trace00:b0->error = error0 ? node->errors[error0] : 0;
 635
 636           if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
 637             {
 638               vxlan_gpe_rx_trace_t *tr =
 639                 vlib_add_trace (vm, node, b0, sizeof (*tr));
 640               tr->next_index = next0;
 641               tr->error = error0;
 642               tr->tunnel_index = tunnel_index0;
 643             }
 644           vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
 645                                            n_left_to_next, bi0, next0);
 646         }
 647
 648       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 649     }
 650   vlib_node_increment_counter (vm, vxlan_gpe_input_node.index,
 651                                VXLAN_GPE_ERROR_DECAPSULATED,
 652                                pkts_decapsulated);
 653   /* Increment any remaining batch stats */
 654   if (stats_n_packets)
 655     {
 656       vlib_increment_combined_counter (im->combined_sw_if_counters +
 657                                        VNET_INTERFACE_COUNTER_RX,
 658                                        thread_index, stats_sw_if_index,
 659                                        stats_n_packets, stats_n_bytes);
 660       node->runtime_data[0] = stats_sw_if_index;
 661     }
 662   return from_frame->n_vectors;
 663 }
 664
 665 /**
 666  * @brief Graph processing dispatch function for IPv4 VXLAN GPE
 667  *
 668  * @node vxlan4-gpe-input
 669  * @param *vm
 670  * @param *node
 671  * @param *from_frame
 672  *
 673  * @return from_frame->n_vectors
 674  *
 675  */
 676 static uword
 677 vxlan4_gpe_input (vlib_main_t * vm, vlib_node_runtime_t * node,
 678                   vlib_frame_t * from_frame)
 679 {
 680   return vxlan_gpe_input (vm, node, from_frame, /* is_ip4 */ 1);
 681 }
 682
 683
 684 void
 685 vxlan_gpe_register_decap_protocol (u8 protocol_id, uword next_node_index)
 686 {
 687   vxlan_gpe_main_t *hm = &vxlan_gpe_main;
 688   hm->decap_next_node_list[protocol_id] = next_node_index;
 689   return;
 690 }
 691
 692 void
 693 vxlan_gpe_unregister_decap_protocol (u8 protocol_id, uword next_node_index)
 694 {
 695   vxlan_gpe_main_t *hm = &vxlan_gpe_main;
 696   hm->decap_next_node_list[protocol_id] = VXLAN_GPE_INPUT_NEXT_DROP;
 697   return;
 698 }
 699
 700
 701 /**
 702  * @brief Graph processing dispatch function for IPv6 VXLAN GPE
 703  *
 704  * @node vxlan6-gpe-input
 705  * @param *vm
 706  * @param *node
 707  * @param *from_frame
 708  *
 709  * @return from_frame->n_vectors - uword
 710  *
 711  */
 712 static uword
 713 vxlan6_gpe_input (vlib_main_t * vm, vlib_node_runtime_t * node,
 714                   vlib_frame_t * from_frame)
 715 {
 716   return vxlan_gpe_input (vm, node, from_frame, /* is_ip4 */ 0);
 717 }
 718
 719 /**
 720  * @brief VXLAN GPE error strings
 721  */
 722 static char *vxlan_gpe_error_strings[] = {
 723 #define vxlan_gpe_error(n,s) s,
 724 #include <vnet/vxlan-gpe/vxlan_gpe_error.def>
 725 #undef vxlan_gpe_error
 726 #undef _
 727 };
 728
 729 /* *INDENT-OFF* */
 730 VLIB_REGISTER_NODE (vxlan4_gpe_input_node) = {
 731   .function = vxlan4_gpe_input,
 732   .name = "vxlan4-gpe-input",
 733   /* Takes a vector of packets. */
 734   .vector_size = sizeof (u32),
 735   .type = VLIB_NODE_TYPE_INTERNAL,
 736   .n_errors = ARRAY_LEN(vxlan_gpe_error_strings),
 737   .error_strings = vxlan_gpe_error_strings,
 738
 739   .n_next_nodes = VXLAN_GPE_INPUT_N_NEXT,
 740   .next_nodes = {
 741 #define _(s,n) [VXLAN_GPE_INPUT_NEXT_##s] = n,
 742     foreach_vxlan_gpe_input_next
 743 #undef _
 744   },
 745
 746   .format_buffer = format_vxlan_gpe_with_length,
 747   .format_trace = format_vxlan_gpe_rx_trace,
 748   // $$$$ .unformat_buffer = unformat_vxlan_gpe_header,
 749 };
 750 /* *INDENT-ON* */
 751
 752 VLIB_NODE_FUNCTION_MULTIARCH (vxlan4_gpe_input_node, vxlan4_gpe_input);
 753
 754 /* *INDENT-OFF* */
 755 VLIB_REGISTER_NODE (vxlan6_gpe_input_node) = {
 756   .function = vxlan6_gpe_input,
 757   .name = "vxlan6-gpe-input",
 758   /* Takes a vector of packets. */
 759   .vector_size = sizeof (u32),
 760   .type = VLIB_NODE_TYPE_INTERNAL,
 761   .n_errors = ARRAY_LEN(vxlan_gpe_error_strings),
 762   .error_strings = vxlan_gpe_error_strings,
 763
 764   .n_next_nodes = VXLAN_GPE_INPUT_N_NEXT,
 765   .next_nodes = {
 766 #define _(s,n) [VXLAN_GPE_INPUT_NEXT_##s] = n,
 767     foreach_vxlan_gpe_input_next
 768 #undef _
 769   },
 770
 771   .format_buffer = format_vxlan_gpe_with_length,
 772   .format_trace = format_vxlan_gpe_rx_trace,
 773   // $$$$ .unformat_buffer = unformat_vxlan_gpe_header,
 774 };
 775 /* *INDENT-ON* */
 776
 777 VLIB_NODE_FUNCTION_MULTIARCH (vxlan6_gpe_input_node, vxlan6_gpe_input);
 778 typedef enum
 779 {
 780   IP_VXLAN_BYPASS_NEXT_DROP,
 781   IP_VXLAN_BYPASS_NEXT_VXLAN,
 782   IP_VXLAN_BYPASS_N_NEXT,
 783 } ip_vxan_bypass_next_t;
 784
 785 always_inline uword
 786 ip_vxlan_gpe_bypass_inline (vlib_main_t * vm,
 787                             vlib_node_runtime_t * node,
 788                             vlib_frame_t * frame, u32 is_ip4)
 789 {
 790   vxlan_gpe_main_t *ngm = &vxlan_gpe_main;
 791   u32 *from, *to_next, n_left_from, n_left_to_next, next_index;
 792   vlib_node_runtime_t *error_node =
 793     vlib_node_get_runtime (vm, ip4_input_node.index);
 794   ip4_address_t addr4;          /* last IPv4 address matching a local VTEP address */
 795   ip6_address_t addr6;          /* last IPv6 address matching a local VTEP address */
 796
 797   from = vlib_frame_vector_args (frame);
 798   n_left_from = frame->n_vectors;
 799   next_index = node->cached_next_index;
 800
 801   if (node->flags & VLIB_NODE_FLAG_TRACE)
 802     ip4_forward_next_trace (vm, node, frame, VLIB_TX);
 803
 804   if (is_ip4)
 805     addr4.data_u32 = ~0;
 806   else
 807     ip6_address_set_zero (&addr6);
 808
 809   while (n_left_from > 0)
 810     {
 811       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
 812
 813       while (n_left_from >= 4 && n_left_to_next >= 2)
 814         {
 815           vlib_buffer_t *b0, *b1;
 816           ip4_header_t *ip40, *ip41;
 817           ip6_header_t *ip60, *ip61;
 818           udp_header_t *udp0, *udp1;
 819           u32 bi0, ip_len0, udp_len0, flags0, next0;
 820           u32 bi1, ip_len1, udp_len1, flags1, next1;
 821           i32 len_diff0, len_diff1;
 822           u8 error0, good_udp0, proto0;
 823           u8 error1, good_udp1, proto1;
 824
 825           /* Prefetch next iteration. */
 826           {
 827             vlib_buffer_t *p2, *p3;
 828
 829             p2 = vlib_get_buffer (vm, from[2]);
 830             p3 = vlib_get_buffer (vm, from[3]);
 831
 832             vlib_prefetch_buffer_header (p2, LOAD);
 833             vlib_prefetch_buffer_header (p3, LOAD);
 834
 835             CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
 836             CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
 837           }
 838
 839           bi0 = to_next[0] = from[0];
 840           bi1 = to_next[1] = from[1];
 841           from += 2;
 842           n_left_from -= 2;
 843           to_next += 2;
 844           n_left_to_next -= 2;
 845
 846           b0 = vlib_get_buffer (vm, bi0);
 847           b1 = vlib_get_buffer (vm, bi1);
 848           if (is_ip4)
 849             {
 850               ip40 = vlib_buffer_get_current (b0);
 851               ip41 = vlib_buffer_get_current (b1);
 852             }
 853           else
 854             {
 855               ip60 = vlib_buffer_get_current (b0);
 856               ip61 = vlib_buffer_get_current (b1);
 857             }
 858
 859           /* Setup packet for next IP feature */
 860           vnet_feature_next (vnet_buffer (b0)->sw_if_index[VLIB_RX], &next0,
 861                              b0);
 862           vnet_feature_next (vnet_buffer (b1)->sw_if_index[VLIB_RX], &next1,
 863                              b1);
 864
 865           if (is_ip4)
 866             {
 867               proto0 = ip40->protocol;
 868               proto1 = ip41->protocol;
 869             }
 870           else
 871             {
 872               proto0 = ip60->protocol;
 873               proto1 = ip61->protocol;
 874             }
 875
 876           /* Process packet 0 */
 877           if (proto0 != IP_PROTOCOL_UDP)
 878             goto exit0;         /* not UDP packet */
 879
 880           if (is_ip4)
 881             udp0 = ip4_next_header (ip40);
 882           else
 883             udp0 = ip6_next_header (ip60);
 884
 885           if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_VXLAN_GPE))
 886             goto exit0;         /* not VXLAN packet */
 887
 888           /* Validate DIP against VTEPs */
 889           if (is_ip4)
 890             {
 891               if (addr4.as_u32 != ip40->dst_address.as_u32)
 892                 {
 893                   if (!hash_get (ngm->vtep4, ip40->dst_address.as_u32))
 894                     goto exit0; /* no local VTEP for VXLAN packet */
 895                   addr4 = ip40->dst_address;
 896                 }
 897             }
 898           else
 899             {
 900               if (!ip6_address_is_equal (&addr6, &ip60->dst_address))
 901                 {
 902                   if (!hash_get_mem (ngm->vtep6, &ip60->dst_address))
 903                     goto exit0; /* no local VTEP for VXLAN packet */
 904                   addr6 = ip60->dst_address;
 905                 }
 906             }
 907
 908           flags0 = b0->flags;
 909           good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
 910
 911           /* Don't verify UDP checksum for packets with explicit zero checksum. */
 912           good_udp0 |= udp0->checksum == 0;
 913
 914           /* Verify UDP length */
 915           if (is_ip4)
 916             ip_len0 = clib_net_to_host_u16 (ip40->length);
 917           else
 918             ip_len0 = clib_net_to_host_u16 (ip60->payload_length);
 919           udp_len0 = clib_net_to_host_u16 (udp0->length);
 920           len_diff0 = ip_len0 - udp_len0;
 921
 922           /* Verify UDP checksum */
 923           if (PREDICT_FALSE (!good_udp0))
 924             {
 925               if ((flags0 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0)
 926                 {
 927                   if (is_ip4)
 928                     flags0 = ip4_tcp_udp_validate_checksum (vm, b0);
 929                   else
 930                     flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, b0);
 931                   good_udp0 =
 932                     (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
 933                 }
 934             }
 935
 936           if (is_ip4)
 937             {
 938               error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM;
 939               error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH;
 940             }
 941           else
 942             {
 943               error0 = good_udp0 ? 0 : IP6_ERROR_UDP_CHECKSUM;
 944               error0 = (len_diff0 >= 0) ? error0 : IP6_ERROR_UDP_LENGTH;
 945             }
 946
 947           next0 = error0 ?
 948             IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
 949           b0->error = error0 ? error_node->errors[error0] : 0;
 950
 951           /* vxlan_gpe-input node expect current at VXLAN header */
 952           if (is_ip4)
 953             vlib_buffer_advance (b0,
 954                                  sizeof (ip4_header_t) +
 955                                  sizeof (udp_header_t));
 956           else
 957             vlib_buffer_advance (b0,
 958                                  sizeof (ip6_header_t) +
 959                                  sizeof (udp_header_t));
 960
 961         exit0:
 962           /* Process packet 1 */
 963           if (proto1 != IP_PROTOCOL_UDP)
 964             goto exit1;         /* not UDP packet */
 965
 966           if (is_ip4)
 967             udp1 = ip4_next_header (ip41);
 968           else
 969             udp1 = ip6_next_header (ip61);
 970
 971           if (udp1->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_VXLAN_GPE))
 972             goto exit1;         /* not VXLAN packet */
 973
 974           /* Validate DIP against VTEPs */
 975           if (is_ip4)
 976             {
 977               if (addr4.as_u32 != ip41->dst_address.as_u32)
 978                 {
 979                   if (!hash_get (ngm->vtep4, ip41->dst_address.as_u32))
 980                     goto exit1; /* no local VTEP for VXLAN packet */
 981                   addr4 = ip41->dst_address;
 982                 }
 983             }
 984           else
 985             {
 986               if (!ip6_address_is_equal (&addr6, &ip61->dst_address))
 987                 {
 988                   if (!hash_get_mem (ngm->vtep6, &ip61->dst_address))
 989                     goto exit1; /* no local VTEP for VXLAN packet */
 990                   addr6 = ip61->dst_address;
 991                 }
 992             }
 993
 994           flags1 = b1->flags;
 995           good_udp1 = (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
 996
 997           /* Don't verify UDP checksum for packets with explicit zero checksum. */
 998           good_udp1 |= udp1->checksum == 0;
 999
1000           /* Verify UDP length */
1001           if (is_ip4)
1002             ip_len1 = clib_net_to_host_u16 (ip41->length);
1003           else
1004             ip_len1 = clib_net_to_host_u16 (ip61->payload_length);
1005           udp_len1 = clib_net_to_host_u16 (udp1->length);
1006           len_diff1 = ip_len1 - udp_len1;
1007
1008           /* Verify UDP checksum */
1009           if (PREDICT_FALSE (!good_udp1))
1010             {
1011               if ((flags1 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0)
1012                 {
1013                   if (is_ip4)
1014                     flags1 = ip4_tcp_udp_validate_checksum (vm, b1);
1015                   else
1016                     flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, b1);
1017                   good_udp1 =
1018                     (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1019                 }
1020             }
1021
1022           if (is_ip4)
1023             {
1024               error1 = good_udp1 ? 0 : IP4_ERROR_UDP_CHECKSUM;
1025               error1 = (len_diff1 >= 0) ? error1 : IP4_ERROR_UDP_LENGTH;
1026             }
1027           else
1028             {
1029               error1 = good_udp1 ? 0 : IP6_ERROR_UDP_CHECKSUM;
1030               error1 = (len_diff1 >= 0) ? error1 : IP6_ERROR_UDP_LENGTH;
1031             }
1032
1033           next1 = error1 ?
1034             IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
1035           b1->error = error1 ? error_node->errors[error1] : 0;
1036
1037           /* vxlan_gpe-input node expect current at VXLAN header */
1038           if (is_ip4)
1039             vlib_buffer_advance (b1,
1040                                  sizeof (ip4_header_t) +
1041                                  sizeof (udp_header_t));
1042           else
1043             vlib_buffer_advance (b1,
1044                                  sizeof (ip6_header_t) +
1045                                  sizeof (udp_header_t));
1046
1047         exit1:
1048           vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1049                                            to_next, n_left_to_next,
1050                                            bi0, bi1, next0, next1);
1051         }
1052
1053       while (n_left_from > 0 && n_left_to_next > 0)
1054         {
1055           vlib_buffer_t *b0;
1056           ip4_header_t *ip40;
1057           ip6_header_t *ip60;
1058           udp_header_t *udp0;
1059           u32 bi0, ip_len0, udp_len0, flags0, next0;
1060           i32 len_diff0;
1061           u8 error0, good_udp0, proto0;
1062
1063           bi0 = to_next[0] = from[0];
1064           from += 1;
1065           n_left_from -= 1;
1066           to_next += 1;
1067           n_left_to_next -= 1;
1068
1069           b0 = vlib_get_buffer (vm, bi0);
1070           if (is_ip4)
1071             ip40 = vlib_buffer_get_current (b0);
1072           else
1073             ip60 = vlib_buffer_get_current (b0);
1074
1075           /* Setup packet for next IP feature */
1076           vnet_feature_next (vnet_buffer (b0)->sw_if_index[VLIB_RX], &next0,
1077                              b0);
1078
1079           if (is_ip4)
1080             proto0 = ip40->protocol;
1081           else
1082             proto0 = ip60->protocol;
1083
1084           if (proto0 != IP_PROTOCOL_UDP)
1085             goto exit;          /* not UDP packet */
1086
1087           if (is_ip4)
1088             udp0 = ip4_next_header (ip40);
1089           else
1090             udp0 = ip6_next_header (ip60);
1091
1092           if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_VXLAN_GPE))
1093             goto exit;          /* not VXLAN packet */
1094
1095           /* Validate DIP against VTEPs */
1096           if (is_ip4)
1097             {
1098               if (addr4.as_u32 != ip40->dst_address.as_u32)
1099                 {
1100                   if (!hash_get (ngm->vtep4, ip40->dst_address.as_u32))
1101                     goto exit;  /* no local VTEP for VXLAN packet */
1102                   addr4 = ip40->dst_address;
1103                 }
1104             }
1105           else
1106             {
1107               if (!ip6_address_is_equal (&addr6, &ip60->dst_address))
1108                 {
1109                   if (!hash_get_mem (ngm->vtep6, &ip60->dst_address))
1110                     goto exit;  /* no local VTEP for VXLAN packet */
1111                   addr6 = ip60->dst_address;
1112                 }
1113             }
1114
1115           flags0 = b0->flags;
1116           good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1117
1118           /* Don't verify UDP checksum for packets with explicit zero checksum. */
1119           good_udp0 |= udp0->checksum == 0;
1120
1121           /* Verify UDP length */
1122           if (is_ip4)
1123             ip_len0 = clib_net_to_host_u16 (ip40->length);
1124           else
1125             ip_len0 = clib_net_to_host_u16 (ip60->payload_length);
1126           udp_len0 = clib_net_to_host_u16 (udp0->length);
1127           len_diff0 = ip_len0 - udp_len0;
1128
1129           /* Verify UDP checksum */
1130           if (PREDICT_FALSE (!good_udp0))
1131             {
1132               if ((flags0 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0)
1133                 {
1134                   if (is_ip4)
1135                     flags0 = ip4_tcp_udp_validate_checksum (vm, b0);
1136                   else
1137                     flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, b0);
1138                   good_udp0 =
1139                     (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1140                 }
1141             }
1142
1143           if (is_ip4)
1144             {
1145               error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM;
1146               error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH;
1147             }
1148           else
1149             {
1150               error0 = good_udp0 ? 0 : IP6_ERROR_UDP_CHECKSUM;
1151               error0 = (len_diff0 >= 0) ? error0 : IP6_ERROR_UDP_LENGTH;
1152             }
1153
1154           next0 = error0 ?
1155             IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
1156           b0->error = error0 ? error_node->errors[error0] : 0;
1157
1158           /* vxlan_gpe-input node expect current at VXLAN header */
1159           if (is_ip4)
1160             vlib_buffer_advance (b0,
1161                                  sizeof (ip4_header_t) +
1162                                  sizeof (udp_header_t));
1163           else
1164             vlib_buffer_advance (b0,
1165                                  sizeof (ip6_header_t) +
1166                                  sizeof (udp_header_t));
1167
1168         exit:
1169           vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1170                                            to_next, n_left_to_next,
1171                                            bi0, next0);
1172         }
1173
1174       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1175     }
1176
1177   return frame->n_vectors;
1178 }
1179
1180 static uword
1181 ip4_vxlan_gpe_bypass (vlib_main_t * vm,
1182                       vlib_node_runtime_t * node, vlib_frame_t * frame)
1183 {
1184   return ip_vxlan_gpe_bypass_inline (vm, node, frame, /* is_ip4 */ 1);
1185 }
1186
1187 /* *INDENT-OFF* */
1188 VLIB_REGISTER_NODE (ip4_vxlan_gpe_bypass_node) = {
1189   .function = ip4_vxlan_gpe_bypass,
1190   .name = "ip4-vxlan-gpe-bypass",
1191   .vector_size = sizeof (u32),
1192
1193   .n_next_nodes = IP_VXLAN_BYPASS_N_NEXT,
1194   .next_nodes = {
1195     [IP_VXLAN_BYPASS_NEXT_DROP] = "error-drop",
1196     [IP_VXLAN_BYPASS_NEXT_VXLAN] = "vxlan4-gpe-input",
1197   },
1198
1199   .format_buffer = format_ip4_header,
1200   .format_trace = format_ip4_forward_next_trace,
1201 };
1202 /* *INDENT-ON* */
1203
1204 VLIB_NODE_FUNCTION_MULTIARCH (ip4_vxlan_gpe_bypass_node, ip4_vxlan_gpe_bypass)
1205 /* Dummy init function to get us linked in. */
1206      clib_error_t *ip4_vxlan_gpe_bypass_init (vlib_main_t * vm)
1207 {
1208   return 0;
1209 }
1210
1211 VLIB_INIT_FUNCTION (ip4_vxlan_gpe_bypass_init);
1212
1213 static uword
1214 ip6_vxlan_gpe_bypass (vlib_main_t * vm,
1215                       vlib_node_runtime_t * node, vlib_frame_t * frame)
1216 {
1217   return ip_vxlan_gpe_bypass_inline (vm, node, frame, /* is_ip4 */ 0);
1218 }
1219
1220 /* *INDENT-OFF* */
1221 VLIB_REGISTER_NODE (ip6_vxlan_gpe_bypass_node) = {
1222   .function = ip6_vxlan_gpe_bypass,
1223   .name = "ip6-vxlan-gpe-bypass",
1224   .vector_size = sizeof (u32),
1225
1226   .n_next_nodes = IP_VXLAN_BYPASS_N_NEXT,
1227   .next_nodes = {
1228     [IP_VXLAN_BYPASS_NEXT_DROP] = "error-drop",
1229     [IP_VXLAN_BYPASS_NEXT_VXLAN] = "vxlan6-gpe-input",
1230   },
1231
1232   .format_buffer = format_ip6_header,
1233   .format_trace = format_ip6_forward_next_trace,
1234 };
1235 /* *INDENT-ON* */
1236
1237 VLIB_NODE_FUNCTION_MULTIARCH (ip6_vxlan_gpe_bypass_node, ip6_vxlan_gpe_bypass)
1238 /* Dummy init function to get us linked in. */
1239      clib_error_t *ip6_vxlan_gpe_bypass_init (vlib_main_t * vm)
1240 {
1241   return 0;
1242 }
1243
1244 VLIB_INIT_FUNCTION (ip6_vxlan_gpe_bypass_init);
1245
1246 /*
1247  * fd.io coding-style-patch-verification: ON
1248  *
1249  * Local Variables:
1250  * eval: (c-set-style "gnu")
1251  * End:
1252  */