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       /**
 342        * ip[46] lookup in the configured FIB
 343        */
 344           vnet_buffer (b0)->sw_if_index[VLIB_TX] = t0->decap_fib_index;
 345
 346           pkts_decapsulated++;
 347           stats_n_packets += 1;
 348           stats_n_bytes += len0;
 349
 350           if (PREDICT_FALSE (sw_if_index0 != stats_sw_if_index))
 351             {
 352               stats_n_packets -= 1;
 353               stats_n_bytes -= len0;
 354               if (stats_n_packets)
 355                 vlib_increment_combined_counter (im->combined_sw_if_counters +
 356                                                  VNET_INTERFACE_COUNTER_RX,
 357                                                  thread_index,
 358                                                  stats_sw_if_index,
 359                                                  stats_n_packets,
 360                                                  stats_n_bytes);
 361               stats_n_packets = 1;
 362               stats_n_bytes = len0;
 363               stats_sw_if_index = sw_if_index0;
 364             }
 365
 366         trace0:b0->error = error0 ? node->errors[error0] : 0;
 367
 368           if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
 369             {
 370               vxlan_gpe_rx_trace_t *tr =
 371                 vlib_add_trace (vm, node, b0, sizeof (*tr));
 372               tr->next_index = next0;
 373               tr->error = error0;
 374               tr->tunnel_index = tunnel_index0;
 375             }
 376
 377           /* Process packet 1 */
 378           if (is_ip4)
 379             {
 380               /* Processing for key4_1 */
 381               if (PREDICT_FALSE ((key4_1.as_u64[0] != last_key4.as_u64[0])
 382                                  || (key4_1.as_u64[1] !=
 383                                      last_key4.as_u64[1])))
 384                 {
 385                   p1 = hash_get_mem (nngm->vxlan4_gpe_tunnel_by_key, &key4_1);
 386
 387                   if (p1 == 0)
 388                     {
 389                       error1 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
 390                       goto trace1;
 391                     }
 392
 393                   last_key4.as_u64[0] = key4_1.as_u64[0];
 394                   last_key4.as_u64[1] = key4_1.as_u64[1];
 395                   tunnel_index1 = last_tunnel_index = p1[0];
 396                 }
 397               else
 398                 tunnel_index1 = last_tunnel_index;
 399             }
 400           else                  /* is_ip6 */
 401             {
 402               /* Processing for key6_1 */
 403               if (PREDICT_FALSE
 404                   (memcmp (&key6_1, &last_key6, sizeof (last_key6)) != 0))
 405                 {
 406                   p1 = hash_get_mem (nngm->vxlan6_gpe_tunnel_by_key, &key6_1);
 407
 408                   if (p1 == 0)
 409                     {
 410                       error1 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
 411                       goto trace1;
 412                     }
 413
 414                   memcpy (&last_key6, &key6_1, sizeof (key6_1));
 415                   tunnel_index1 = last_tunnel_index = p1[0];
 416                 }
 417               else
 418                 tunnel_index1 = last_tunnel_index;
 419             }
 420
 421           t1 = pool_elt_at_index (nngm->tunnels, tunnel_index1);
 422
 423           sw_if_index1 = t1->sw_if_index;
 424           len1 = vlib_buffer_length_in_chain (vm, b1);
 425
 426           /* Required to make the l2 tag push / pop code work on l2 subifs */
 427           vnet_update_l2_len (b1);
 428
 429           /*
 430            * ip[46] lookup in the configured FIB
 431            */
 432           vnet_buffer (b1)->sw_if_index[VLIB_TX] = t1->decap_fib_index;
 433
 434           pkts_decapsulated++;
 435           stats_n_packets += 1;
 436           stats_n_bytes += len1;
 437
 438           /* Batch stats increment on the same vxlan tunnel so counter
 439              is not incremented per packet */
 440           if (PREDICT_FALSE (sw_if_index1 != stats_sw_if_index))
 441             {
 442               stats_n_packets -= 1;
 443               stats_n_bytes -= len1;
 444               if (stats_n_packets)
 445                 vlib_increment_combined_counter (im->combined_sw_if_counters +
 446                                                  VNET_INTERFACE_COUNTER_RX,
 447                                                  thread_index,
 448                                                  stats_sw_if_index,
 449                                                  stats_n_packets,
 450                                                  stats_n_bytes);
 451               stats_n_packets = 1;
 452               stats_n_bytes = len1;
 453               stats_sw_if_index = sw_if_index1;
 454             }
 455           vnet_buffer (b1)->sw_if_index[VLIB_TX] = t1->decap_fib_index;
 456
 457         trace1:b1->error = error1 ? node->errors[error1] : 0;
 458
 459           if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
 460             {
 461               vxlan_gpe_rx_trace_t *tr =
 462                 vlib_add_trace (vm, node, b1, sizeof (*tr));
 463               tr->next_index = next1;
 464               tr->error = error1;
 465               tr->tunnel_index = tunnel_index1;
 466             }
 467
 468           vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
 469                                            n_left_to_next, bi0, bi1, next0,
 470                                            next1);
 471         }
 472
 473       while (n_left_from > 0 && n_left_to_next > 0)
 474         {
 475           u32 bi0;
 476           vlib_buffer_t *b0;
 477           u32 next0;
 478           ip4_vxlan_gpe_header_t *iuvn4_0;
 479           ip6_vxlan_gpe_header_t *iuvn6_0;
 480           uword *p0;
 481           u32 tunnel_index0;
 482           vxlan_gpe_tunnel_t *t0;
 483           vxlan4_gpe_tunnel_key_t key4_0;
 484           vxlan6_gpe_tunnel_key_t key6_0;
 485           u32 error0;
 486           u32 sw_if_index0, len0;
 487
 488           bi0 = from[0];
 489           to_next[0] = bi0;
 490           from += 1;
 491           to_next += 1;
 492           n_left_from -= 1;
 493           n_left_to_next -= 1;
 494
 495           b0 = vlib_get_buffer (vm, bi0);
 496
 497           if (is_ip4)
 498             {
 499               /* udp leaves current_data pointing at the vxlan-gpe header */
 500               vlib_buffer_advance (b0,
 501                                    -(word) (sizeof (udp_header_t) +
 502                                             sizeof (ip4_header_t)));
 503
 504               iuvn4_0 = vlib_buffer_get_current (b0);
 505
 506               /* pop (ip, udp, vxlan) */
 507               vlib_buffer_advance (b0, sizeof (*iuvn4_0));
 508             }
 509           else
 510             {
 511               /* udp leaves current_data pointing at the vxlan-gpe header */
 512               vlib_buffer_advance (b0,
 513                                    -(word) (sizeof (udp_header_t) +
 514                                             sizeof (ip6_header_t)));
 515
 516               iuvn6_0 = vlib_buffer_get_current (b0);
 517
 518               /* pop (ip, udp, vxlan) */
 519               vlib_buffer_advance (b0, sizeof (*iuvn6_0));
 520             }
 521
 522           tunnel_index0 = ~0;
 523           error0 = 0;
 524
 525           if (is_ip4)
 526             {
 527               next0 =
 528                 (iuvn4_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
 529                 nngm->decap_next_node_list[iuvn4_0->vxlan.protocol] :
 530                 VXLAN_GPE_INPUT_NEXT_DROP;
 531
 532               key4_0.local = iuvn4_0->ip4.dst_address.as_u32;
 533               key4_0.remote = iuvn4_0->ip4.src_address.as_u32;
 534               key4_0.vni = iuvn4_0->vxlan.vni_res;
 535               key4_0.pad = 0;
 536
 537               /* Processing for key4_0 */
 538               if (PREDICT_FALSE ((key4_0.as_u64[0] != last_key4.as_u64[0])
 539                                  || (key4_0.as_u64[1] !=
 540                                      last_key4.as_u64[1])))
 541                 {
 542                   p0 = hash_get_mem (nngm->vxlan4_gpe_tunnel_by_key, &key4_0);
 543
 544                   if (p0 == 0)
 545                     {
 546                       error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
 547                       goto trace00;
 548                     }
 549
 550                   last_key4.as_u64[0] = key4_0.as_u64[0];
 551                   last_key4.as_u64[1] = key4_0.as_u64[1];
 552                   tunnel_index0 = last_tunnel_index = p0[0];
 553                 }
 554               else
 555                 tunnel_index0 = last_tunnel_index;
 556             }
 557           else                  /* is_ip6 */
 558             {
 559               next0 =
 560                 (iuvn6_0->vxlan.protocol < VXLAN_GPE_PROTOCOL_MAX) ?
 561                 nngm->decap_next_node_list[iuvn6_0->vxlan.protocol] :
 562                 VXLAN_GPE_INPUT_NEXT_DROP;
 563
 564               key6_0.local.as_u64[0] = iuvn6_0->ip6.dst_address.as_u64[0];
 565               key6_0.local.as_u64[1] = iuvn6_0->ip6.dst_address.as_u64[1];
 566               key6_0.remote.as_u64[0] = iuvn6_0->ip6.src_address.as_u64[0];
 567               key6_0.remote.as_u64[1] = iuvn6_0->ip6.src_address.as_u64[1];
 568               key6_0.vni = iuvn6_0->vxlan.vni_res;
 569
 570               /* Processing for key6_0 */
 571               if (PREDICT_FALSE
 572                   (memcmp (&key6_0, &last_key6, sizeof (last_key6)) != 0))
 573                 {
 574                   p0 = hash_get_mem (nngm->vxlan6_gpe_tunnel_by_key, &key6_0);
 575
 576                   if (p0 == 0)
 577                     {
 578                       error0 = VXLAN_GPE_ERROR_NO_SUCH_TUNNEL;
 579                       goto trace00;
 580                     }
 581
 582                   memcpy (&last_key6, &key6_0, sizeof (key6_0));
 583                   tunnel_index0 = last_tunnel_index = p0[0];
 584                 }
 585               else
 586                 tunnel_index0 = last_tunnel_index;
 587             }
 588
 589           t0 = pool_elt_at_index (nngm->tunnels, tunnel_index0);
 590
 591
 592           sw_if_index0 = t0->sw_if_index;
 593           len0 = vlib_buffer_length_in_chain (vm, b0);
 594
 595           /* Required to make the l2 tag push / pop code work on l2 subifs */
 596           vnet_update_l2_len (b0);
 597
 598           /*
 599            * ip[46] lookup in the configured FIB
 600            */
 601           vnet_buffer (b0)->sw_if_index[VLIB_TX] = t0->decap_fib_index;
 602
 603           pkts_decapsulated++;
 604           stats_n_packets += 1;
 605           stats_n_bytes += len0;
 606
 607           /* Batch stats increment on the same vxlan-gpe tunnel so counter
 608              is not incremented per packet */
 609           if (PREDICT_FALSE (sw_if_index0 != stats_sw_if_index))
 610             {
 611               stats_n_packets -= 1;
 612               stats_n_bytes -= len0;
 613               if (stats_n_packets)
 614                 vlib_increment_combined_counter (im->combined_sw_if_counters +
 615                                                  VNET_INTERFACE_COUNTER_RX,
 616                                                  thread_index,
 617                                                  stats_sw_if_index,
 618                                                  stats_n_packets,
 619                                                  stats_n_bytes);
 620               stats_n_packets = 1;
 621               stats_n_bytes = len0;
 622               stats_sw_if_index = sw_if_index0;
 623             }
 624
 625         trace00:b0->error = error0 ? node->errors[error0] : 0;
 626
 627           if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
 628             {
 629               vxlan_gpe_rx_trace_t *tr =
 630                 vlib_add_trace (vm, node, b0, sizeof (*tr));
 631               tr->next_index = next0;
 632               tr->error = error0;
 633               tr->tunnel_index = tunnel_index0;
 634             }
 635           vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
 636                                            n_left_to_next, bi0, next0);
 637         }
 638
 639       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 640     }
 641   vlib_node_increment_counter (vm, vxlan_gpe_input_node.index,
 642                                VXLAN_GPE_ERROR_DECAPSULATED,
 643                                pkts_decapsulated);
 644   /* Increment any remaining batch stats */
 645   if (stats_n_packets)
 646     {
 647       vlib_increment_combined_counter (im->combined_sw_if_counters +
 648                                        VNET_INTERFACE_COUNTER_RX,
 649                                        thread_index, stats_sw_if_index,
 650                                        stats_n_packets, stats_n_bytes);
 651       node->runtime_data[0] = stats_sw_if_index;
 652     }
 653   return from_frame->n_vectors;
 654 }
 655
 656 /**
 657  * @brief Graph processing dispatch function for IPv4 VXLAN GPE
 658  *
 659  * @node vxlan4-gpe-input
 660  * @param *vm
 661  * @param *node
 662  * @param *from_frame
 663  *
 664  * @return from_frame->n_vectors
 665  *
 666  */
 667 static uword
 668 vxlan4_gpe_input (vlib_main_t * vm, vlib_node_runtime_t * node,
 669                   vlib_frame_t * from_frame)
 670 {
 671   return vxlan_gpe_input (vm, node, from_frame, /* is_ip4 */ 1);
 672 }
 673
 674
 675 void
 676 vxlan_gpe_register_decap_protocol (u8 protocol_id, uword next_node_index)
 677 {
 678   vxlan_gpe_main_t *hm = &vxlan_gpe_main;
 679   hm->decap_next_node_list[protocol_id] = next_node_index;
 680   return;
 681 }
 682
 683 void
 684 vxlan_gpe_unregister_decap_protocol (u8 protocol_id, uword next_node_index)
 685 {
 686   vxlan_gpe_main_t *hm = &vxlan_gpe_main;
 687   hm->decap_next_node_list[protocol_id] = VXLAN_GPE_INPUT_NEXT_DROP;
 688   return;
 689 }
 690
 691
 692 /**
 693  * @brief Graph processing dispatch function for IPv6 VXLAN GPE
 694  *
 695  * @node vxlan6-gpe-input
 696  * @param *vm
 697  * @param *node
 698  * @param *from_frame
 699  *
 700  * @return from_frame->n_vectors - uword
 701  *
 702  */
 703 static uword
 704 vxlan6_gpe_input (vlib_main_t * vm, vlib_node_runtime_t * node,
 705                   vlib_frame_t * from_frame)
 706 {
 707   return vxlan_gpe_input (vm, node, from_frame, /* is_ip4 */ 0);
 708 }
 709
 710 /**
 711  * @brief VXLAN GPE error strings
 712  */
 713 static char *vxlan_gpe_error_strings[] = {
 714 #define vxlan_gpe_error(n,s) s,
 715 #include <vnet/vxlan-gpe/vxlan_gpe_error.def>
 716 #undef vxlan_gpe_error
 717 #undef _
 718 };
 719
 720 /* *INDENT-OFF* */
 721 VLIB_REGISTER_NODE (vxlan4_gpe_input_node) = {
 722   .function = vxlan4_gpe_input,
 723   .name = "vxlan4-gpe-input",
 724   /* Takes a vector of packets. */
 725   .vector_size = sizeof (u32),
 726   .type = VLIB_NODE_TYPE_INTERNAL,
 727   .n_errors = ARRAY_LEN(vxlan_gpe_error_strings),
 728   .error_strings = vxlan_gpe_error_strings,
 729
 730   .n_next_nodes = VXLAN_GPE_INPUT_N_NEXT,
 731   .next_nodes = {
 732 #define _(s,n) [VXLAN_GPE_INPUT_NEXT_##s] = n,
 733     foreach_vxlan_gpe_input_next
 734 #undef _
 735   },
 736
 737   .format_buffer = format_vxlan_gpe_with_length,
 738   .format_trace = format_vxlan_gpe_rx_trace,
 739   // $$$$ .unformat_buffer = unformat_vxlan_gpe_header,
 740 };
 741 /* *INDENT-ON* */
 742
 743 VLIB_NODE_FUNCTION_MULTIARCH (vxlan4_gpe_input_node, vxlan4_gpe_input);
 744
 745 /* *INDENT-OFF* */
 746 VLIB_REGISTER_NODE (vxlan6_gpe_input_node) = {
 747   .function = vxlan6_gpe_input,
 748   .name = "vxlan6-gpe-input",
 749   /* Takes a vector of packets. */
 750   .vector_size = sizeof (u32),
 751   .type = VLIB_NODE_TYPE_INTERNAL,
 752   .n_errors = ARRAY_LEN(vxlan_gpe_error_strings),
 753   .error_strings = vxlan_gpe_error_strings,
 754
 755   .n_next_nodes = VXLAN_GPE_INPUT_N_NEXT,
 756   .next_nodes = {
 757 #define _(s,n) [VXLAN_GPE_INPUT_NEXT_##s] = n,
 758     foreach_vxlan_gpe_input_next
 759 #undef _
 760   },
 761
 762   .format_buffer = format_vxlan_gpe_with_length,
 763   .format_trace = format_vxlan_gpe_rx_trace,
 764   // $$$$ .unformat_buffer = unformat_vxlan_gpe_header,
 765 };
 766 /* *INDENT-ON* */
 767
 768 VLIB_NODE_FUNCTION_MULTIARCH (vxlan6_gpe_input_node, vxlan6_gpe_input);
 769 typedef enum
 770 {
 771   IP_VXLAN_BYPASS_NEXT_DROP,
 772   IP_VXLAN_BYPASS_NEXT_VXLAN,
 773   IP_VXLAN_BYPASS_N_NEXT,
 774 } ip_vxan_bypass_next_t;
 775
 776 always_inline uword
 777 ip_vxlan_gpe_bypass_inline (vlib_main_t * vm,
 778                             vlib_node_runtime_t * node,
 779                             vlib_frame_t * frame, u32 is_ip4)
 780 {
 781   vxlan_gpe_main_t *ngm = &vxlan_gpe_main;
 782   u32 *from, *to_next, n_left_from, n_left_to_next, next_index;
 783   vlib_node_runtime_t *error_node =
 784     vlib_node_get_runtime (vm, ip4_input_node.index);
 785   ip4_address_t addr4;          /* last IPv4 address matching a local VTEP address */
 786   ip6_address_t addr6;          /* last IPv6 address matching a local VTEP address */
 787
 788   from = vlib_frame_vector_args (frame);
 789   n_left_from = frame->n_vectors;
 790   next_index = node->cached_next_index;
 791
 792   if (node->flags & VLIB_NODE_FLAG_TRACE)
 793     ip4_forward_next_trace (vm, node, frame, VLIB_TX);
 794
 795   if (is_ip4)
 796     addr4.data_u32 = ~0;
 797   else
 798     ip6_address_set_zero (&addr6);
 799
 800   while (n_left_from > 0)
 801     {
 802       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
 803
 804       while (n_left_from >= 4 && n_left_to_next >= 2)
 805         {
 806           vlib_buffer_t *b0, *b1;
 807           ip4_header_t *ip40, *ip41;
 808           ip6_header_t *ip60, *ip61;
 809           udp_header_t *udp0, *udp1;
 810           u32 bi0, ip_len0, udp_len0, flags0, next0;
 811           u32 bi1, ip_len1, udp_len1, flags1, next1;
 812           i32 len_diff0, len_diff1;
 813           u8 error0, good_udp0, proto0;
 814           u8 error1, good_udp1, proto1;
 815
 816           /* Prefetch next iteration. */
 817           {
 818             vlib_buffer_t *p2, *p3;
 819
 820             p2 = vlib_get_buffer (vm, from[2]);
 821             p3 = vlib_get_buffer (vm, from[3]);
 822
 823             vlib_prefetch_buffer_header (p2, LOAD);
 824             vlib_prefetch_buffer_header (p3, LOAD);
 825
 826             CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
 827             CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
 828           }
 829
 830           bi0 = to_next[0] = from[0];
 831           bi1 = to_next[1] = from[1];
 832           from += 2;
 833           n_left_from -= 2;
 834           to_next += 2;
 835           n_left_to_next -= 2;
 836
 837           b0 = vlib_get_buffer (vm, bi0);
 838           b1 = vlib_get_buffer (vm, bi1);
 839           if (is_ip4)
 840             {
 841               ip40 = vlib_buffer_get_current (b0);
 842               ip41 = vlib_buffer_get_current (b1);
 843             }
 844           else
 845             {
 846               ip60 = vlib_buffer_get_current (b0);
 847               ip61 = vlib_buffer_get_current (b1);
 848             }
 849
 850           /* Setup packet for next IP feature */
 851           vnet_feature_next (vnet_buffer (b0)->sw_if_index[VLIB_RX], &next0,
 852                              b0);
 853           vnet_feature_next (vnet_buffer (b1)->sw_if_index[VLIB_RX], &next1,
 854                              b1);
 855
 856           if (is_ip4)
 857             {
 858               proto0 = ip40->protocol;
 859               proto1 = ip41->protocol;
 860             }
 861           else
 862             {
 863               proto0 = ip60->protocol;
 864               proto1 = ip61->protocol;
 865             }
 866
 867           /* Process packet 0 */
 868           if (proto0 != IP_PROTOCOL_UDP)
 869             goto exit0;         /* not UDP packet */
 870
 871           if (is_ip4)
 872             udp0 = ip4_next_header (ip40);
 873           else
 874             udp0 = ip6_next_header (ip60);
 875
 876           if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_VXLAN_GPE))
 877             goto exit0;         /* not VXLAN packet */
 878
 879           /* Validate DIP against VTEPs */
 880           if (is_ip4)
 881             {
 882               if (addr4.as_u32 != ip40->dst_address.as_u32)
 883                 {
 884                   if (!hash_get (ngm->vtep4, ip40->dst_address.as_u32))
 885                     goto exit0; /* no local VTEP for VXLAN packet */
 886                   addr4 = ip40->dst_address;
 887                 }
 888             }
 889           else
 890             {
 891               if (!ip6_address_is_equal (&addr6, &ip60->dst_address))
 892                 {
 893                   if (!hash_get_mem (ngm->vtep6, &ip60->dst_address))
 894                     goto exit0; /* no local VTEP for VXLAN packet */
 895                   addr6 = ip60->dst_address;
 896                 }
 897             }
 898
 899           flags0 = b0->flags;
 900           good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
 901
 902           /* Don't verify UDP checksum for packets with explicit zero checksum. */
 903           good_udp0 |= udp0->checksum == 0;
 904
 905           /* Verify UDP length */
 906           if (is_ip4)
 907             ip_len0 = clib_net_to_host_u16 (ip40->length);
 908           else
 909             ip_len0 = clib_net_to_host_u16 (ip60->payload_length);
 910           udp_len0 = clib_net_to_host_u16 (udp0->length);
 911           len_diff0 = ip_len0 - udp_len0;
 912
 913           /* Verify UDP checksum */
 914           if (PREDICT_FALSE (!good_udp0))
 915             {
 916               if ((flags0 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0)
 917                 {
 918                   if (is_ip4)
 919                     flags0 = ip4_tcp_udp_validate_checksum (vm, b0);
 920                   else
 921                     flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, b0);
 922                   good_udp0 =
 923                     (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
 924                 }
 925             }
 926
 927           if (is_ip4)
 928             {
 929               error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM;
 930               error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH;
 931             }
 932           else
 933             {
 934               error0 = good_udp0 ? 0 : IP6_ERROR_UDP_CHECKSUM;
 935               error0 = (len_diff0 >= 0) ? error0 : IP6_ERROR_UDP_LENGTH;
 936             }
 937
 938           next0 = error0 ?
 939             IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
 940           b0->error = error0 ? error_node->errors[error0] : 0;
 941
 942           /* vxlan_gpe-input node expect current at VXLAN header */
 943           if (is_ip4)
 944             vlib_buffer_advance (b0,
 945                                  sizeof (ip4_header_t) +
 946                                  sizeof (udp_header_t));
 947           else
 948             vlib_buffer_advance (b0,
 949                                  sizeof (ip6_header_t) +
 950                                  sizeof (udp_header_t));
 951
 952         exit0:
 953           /* Process packet 1 */
 954           if (proto1 != IP_PROTOCOL_UDP)
 955             goto exit1;         /* not UDP packet */
 956
 957           if (is_ip4)
 958             udp1 = ip4_next_header (ip41);
 959           else
 960             udp1 = ip6_next_header (ip61);
 961
 962           if (udp1->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_VXLAN_GPE))
 963             goto exit1;         /* not VXLAN packet */
 964
 965           /* Validate DIP against VTEPs */
 966           if (is_ip4)
 967             {
 968               if (addr4.as_u32 != ip41->dst_address.as_u32)
 969                 {
 970                   if (!hash_get (ngm->vtep4, ip41->dst_address.as_u32))
 971                     goto exit1; /* no local VTEP for VXLAN packet */
 972                   addr4 = ip41->dst_address;
 973                 }
 974             }
 975           else
 976             {
 977               if (!ip6_address_is_equal (&addr6, &ip61->dst_address))
 978                 {
 979                   if (!hash_get_mem (ngm->vtep6, &ip61->dst_address))
 980                     goto exit1; /* no local VTEP for VXLAN packet */
 981                   addr6 = ip61->dst_address;
 982                 }
 983             }
 984
 985           flags1 = b1->flags;
 986           good_udp1 = (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
 987
 988           /* Don't verify UDP checksum for packets with explicit zero checksum. */
 989           good_udp1 |= udp1->checksum == 0;
 990
 991           /* Verify UDP length */
 992           if (is_ip4)
 993             ip_len1 = clib_net_to_host_u16 (ip41->length);
 994           else
 995             ip_len1 = clib_net_to_host_u16 (ip61->payload_length);
 996           udp_len1 = clib_net_to_host_u16 (udp1->length);
 997           len_diff1 = ip_len1 - udp_len1;
 998
 999           /* Verify UDP checksum */
1000           if (PREDICT_FALSE (!good_udp1))
1001             {
1002               if ((flags1 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0)
1003                 {
1004                   if (is_ip4)
1005                     flags1 = ip4_tcp_udp_validate_checksum (vm, b1);
1006                   else
1007                     flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, b1);
1008                   good_udp1 =
1009                     (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1010                 }
1011             }
1012
1013           if (is_ip4)
1014             {
1015               error1 = good_udp1 ? 0 : IP4_ERROR_UDP_CHECKSUM;
1016               error1 = (len_diff1 >= 0) ? error1 : IP4_ERROR_UDP_LENGTH;
1017             }
1018           else
1019             {
1020               error1 = good_udp1 ? 0 : IP6_ERROR_UDP_CHECKSUM;
1021               error1 = (len_diff1 >= 0) ? error1 : IP6_ERROR_UDP_LENGTH;
1022             }
1023
1024           next1 = error1 ?
1025             IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
1026           b1->error = error1 ? error_node->errors[error1] : 0;
1027
1028           /* vxlan_gpe-input node expect current at VXLAN header */
1029           if (is_ip4)
1030             vlib_buffer_advance (b1,
1031                                  sizeof (ip4_header_t) +
1032                                  sizeof (udp_header_t));
1033           else
1034             vlib_buffer_advance (b1,
1035                                  sizeof (ip6_header_t) +
1036                                  sizeof (udp_header_t));
1037
1038         exit1:
1039           vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
1040                                            to_next, n_left_to_next,
1041                                            bi0, bi1, next0, next1);
1042         }
1043
1044       while (n_left_from > 0 && n_left_to_next > 0)
1045         {
1046           vlib_buffer_t *b0;
1047           ip4_header_t *ip40;
1048           ip6_header_t *ip60;
1049           udp_header_t *udp0;
1050           u32 bi0, ip_len0, udp_len0, flags0, next0;
1051           i32 len_diff0;
1052           u8 error0, good_udp0, proto0;
1053
1054           bi0 = to_next[0] = from[0];
1055           from += 1;
1056           n_left_from -= 1;
1057           to_next += 1;
1058           n_left_to_next -= 1;
1059
1060           b0 = vlib_get_buffer (vm, bi0);
1061           if (is_ip4)
1062             ip40 = vlib_buffer_get_current (b0);
1063           else
1064             ip60 = vlib_buffer_get_current (b0);
1065
1066           /* Setup packet for next IP feature */
1067           vnet_feature_next (vnet_buffer (b0)->sw_if_index[VLIB_RX], &next0,
1068                              b0);
1069
1070           if (is_ip4)
1071             proto0 = ip40->protocol;
1072           else
1073             proto0 = ip60->protocol;
1074
1075           if (proto0 != IP_PROTOCOL_UDP)
1076             goto exit;          /* not UDP packet */
1077
1078           if (is_ip4)
1079             udp0 = ip4_next_header (ip40);
1080           else
1081             udp0 = ip6_next_header (ip60);
1082
1083           if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_VXLAN_GPE))
1084             goto exit;          /* not VXLAN packet */
1085
1086           /* Validate DIP against VTEPs */
1087           if (is_ip4)
1088             {
1089               if (addr4.as_u32 != ip40->dst_address.as_u32)
1090                 {
1091                   if (!hash_get (ngm->vtep4, ip40->dst_address.as_u32))
1092                     goto exit;  /* no local VTEP for VXLAN packet */
1093                   addr4 = ip40->dst_address;
1094                 }
1095             }
1096           else
1097             {
1098               if (!ip6_address_is_equal (&addr6, &ip60->dst_address))
1099                 {
1100                   if (!hash_get_mem (ngm->vtep6, &ip60->dst_address))
1101                     goto exit;  /* no local VTEP for VXLAN packet */
1102                   addr6 = ip60->dst_address;
1103                 }
1104             }
1105
1106           flags0 = b0->flags;
1107           good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1108
1109           /* Don't verify UDP checksum for packets with explicit zero checksum. */
1110           good_udp0 |= udp0->checksum == 0;
1111
1112           /* Verify UDP length */
1113           if (is_ip4)
1114             ip_len0 = clib_net_to_host_u16 (ip40->length);
1115           else
1116             ip_len0 = clib_net_to_host_u16 (ip60->payload_length);
1117           udp_len0 = clib_net_to_host_u16 (udp0->length);
1118           len_diff0 = ip_len0 - udp_len0;
1119
1120           /* Verify UDP checksum */
1121           if (PREDICT_FALSE (!good_udp0))
1122             {
1123               if ((flags0 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0)
1124                 {
1125                   if (is_ip4)
1126                     flags0 = ip4_tcp_udp_validate_checksum (vm, b0);
1127                   else
1128                     flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, b0);
1129                   good_udp0 =
1130                     (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
1131                 }
1132             }
1133
1134           if (is_ip4)
1135             {
1136               error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM;
1137               error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH;
1138             }
1139           else
1140             {
1141               error0 = good_udp0 ? 0 : IP6_ERROR_UDP_CHECKSUM;
1142               error0 = (len_diff0 >= 0) ? error0 : IP6_ERROR_UDP_LENGTH;
1143             }
1144
1145           next0 = error0 ?
1146             IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
1147           b0->error = error0 ? error_node->errors[error0] : 0;
1148
1149           /* vxlan_gpe-input node expect current at VXLAN header */
1150           if (is_ip4)
1151             vlib_buffer_advance (b0,
1152                                  sizeof (ip4_header_t) +
1153                                  sizeof (udp_header_t));
1154           else
1155             vlib_buffer_advance (b0,
1156                                  sizeof (ip6_header_t) +
1157                                  sizeof (udp_header_t));
1158
1159         exit:
1160           vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1161                                            to_next, n_left_to_next,
1162                                            bi0, next0);
1163         }
1164
1165       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1166     }
1167
1168   return frame->n_vectors;
1169 }
1170
1171 static uword
1172 ip4_vxlan_gpe_bypass (vlib_main_t * vm,
1173                       vlib_node_runtime_t * node, vlib_frame_t * frame)
1174 {
1175   return ip_vxlan_gpe_bypass_inline (vm, node, frame, /* is_ip4 */ 1);
1176 }
1177
1178 /* *INDENT-OFF* */
1179 VLIB_REGISTER_NODE (ip4_vxlan_gpe_bypass_node) = {
1180   .function = ip4_vxlan_gpe_bypass,
1181   .name = "ip4-vxlan-gpe-bypass",
1182   .vector_size = sizeof (u32),
1183
1184   .n_next_nodes = IP_VXLAN_BYPASS_N_NEXT,
1185   .next_nodes = {
1186     [IP_VXLAN_BYPASS_NEXT_DROP] = "error-drop",
1187     [IP_VXLAN_BYPASS_NEXT_VXLAN] = "vxlan4-gpe-input",
1188   },
1189
1190   .format_buffer = format_ip4_header,
1191   .format_trace = format_ip4_forward_next_trace,
1192 };
1193 /* *INDENT-ON* */
1194
1195 VLIB_NODE_FUNCTION_MULTIARCH (ip4_vxlan_gpe_bypass_node, ip4_vxlan_gpe_bypass)
1196 /* Dummy init function to get us linked in. */
1197      clib_error_t *ip4_vxlan_gpe_bypass_init (vlib_main_t * vm)
1198 {
1199   return 0;
1200 }
1201
1202 VLIB_INIT_FUNCTION (ip4_vxlan_gpe_bypass_init);
1203
1204 static uword
1205 ip6_vxlan_gpe_bypass (vlib_main_t * vm,
1206                       vlib_node_runtime_t * node, vlib_frame_t * frame)
1207 {
1208   return ip_vxlan_gpe_bypass_inline (vm, node, frame, /* is_ip4 */ 0);
1209 }
1210
1211 /* *INDENT-OFF* */
1212 VLIB_REGISTER_NODE (ip6_vxlan_gpe_bypass_node) = {
1213   .function = ip6_vxlan_gpe_bypass,
1214   .name = "ip6-vxlan-gpe-bypass",
1215   .vector_size = sizeof (u32),
1216
1217   .n_next_nodes = IP_VXLAN_BYPASS_N_NEXT,
1218   .next_nodes = {
1219     [IP_VXLAN_BYPASS_NEXT_DROP] = "error-drop",
1220     [IP_VXLAN_BYPASS_NEXT_VXLAN] = "vxlan6-gpe-input",
1221   },
1222
1223   .format_buffer = format_ip6_header,
1224   .format_trace = format_ip6_forward_next_trace,
1225 };
1226 /* *INDENT-ON* */
1227
1228 VLIB_NODE_FUNCTION_MULTIARCH (ip6_vxlan_gpe_bypass_node, ip6_vxlan_gpe_bypass)
1229 /* Dummy init function to get us linked in. */
1230      clib_error_t *ip6_vxlan_gpe_bypass_init (vlib_main_t * vm)
1231 {
1232   return 0;
1233 }
1234
1235 VLIB_INIT_FUNCTION (ip6_vxlan_gpe_bypass_init);
1236
1237 /*
1238  * fd.io coding-style-patch-verification: ON
1239  *
1240  * Local Variables:
1241  * eval: (c-set-style "gnu")
1242  * End:
1243  */