src/vnet/ipsec/ipsec_if_in.c

   1 /*
   2  * ipsec_if_in.c : IPSec interface input node
   3  *
   4  * Copyright (c) 2015 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 #include <vnet/vnet.h>
  19 #include <vnet/api_errno.h>
  20 #include <vnet/ip/ip.h>
  21
  22 #include <vnet/ipsec/ipsec.h>
  23 #include <vnet/ipsec/esp.h>
  24 #include <vnet/ipsec/ipsec_io.h>
  25 #include <vnet/ipsec/ipsec_punt.h>
  26
  27 /* Statistics (not really errors) */
  28 #define foreach_ipsec_if_input_error                              \
  29 _(RX, "good packets received")                                    \
  30 _(DISABLED, "ipsec packets received on disabled interface")       \
  31 _(NO_TUNNEL, "no matching tunnel")                                \
  32 _(SPI_0, "SPI 0")
  33
  34 static char *ipsec_if_input_error_strings[] = {
  35 #define _(sym,string) string,
  36   foreach_ipsec_if_input_error
  37 #undef _
  38 };
  39
  40 typedef enum
  41 {
  42 #define _(sym,str) IPSEC_IF_INPUT_ERROR_##sym,
  43   foreach_ipsec_if_input_error
  44 #undef _
  45     IPSEC_IF_INPUT_N_ERROR,
  46 } ipsec_if_input_error_t;
  47
  48
  49 typedef struct
  50 {
  51   u32 spi;
  52   u32 seq;
  53 } ipsec_if_input_trace_t;
  54
  55 static u8 *
  56 format_ipsec_if_input_trace (u8 * s, va_list * args)
  57 {
  58   CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
  59   CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
  60   ipsec_if_input_trace_t *t = va_arg (*args, ipsec_if_input_trace_t *);
  61
  62   s = format (s, "IPSec: spi %u (0x%08x) seq %u", t->spi, t->spi, t->seq);
  63   return s;
  64 }
  65
  66 always_inline u16
  67 ipsec_ip4_if_no_tunnel (vlib_node_runtime_t * node,
  68                         vlib_buffer_t * b,
  69                         const esp_header_t * esp,
  70                         const ip4_header_t * ip4, u16 offset)
  71 {
  72   if (PREDICT_FALSE (0 == esp->spi))
  73     {
  74       b->error = node->errors[IPSEC_IF_INPUT_ERROR_SPI_0];
  75       b->punt_reason =
  76         ipsec_punt_reason[(ip4->protocol == IP_PROTOCOL_UDP ?
  77                            IPSEC_PUNT_IP4_SPI_UDP_0 :
  78                            IPSEC_PUNT_IP4_NO_SUCH_TUNNEL)];
  79     }
  80   else
  81     {
  82       b->error = node->errors[IPSEC_IF_INPUT_ERROR_NO_TUNNEL];
  83       b->punt_reason = ipsec_punt_reason[IPSEC_PUNT_IP4_NO_SUCH_TUNNEL];
  84     }
  85   vlib_buffer_advance (b, -offset);
  86   return IPSEC_INPUT_NEXT_PUNT;
  87 }
  88
  89 always_inline u16
  90 ipsec_ip6_if_no_tunnel (vlib_node_runtime_t * node,
  91                         vlib_buffer_t * b,
  92                         const esp_header_t * esp, u16 offset)
  93 {
  94   b->error = node->errors[IPSEC_IF_INPUT_ERROR_NO_TUNNEL];
  95   b->punt_reason = ipsec_punt_reason[IPSEC_PUNT_IP6_NO_SUCH_TUNNEL];
  96
  97   vlib_buffer_advance (b, -offset);
  98   return (IPSEC_INPUT_NEXT_PUNT);
  99 }
 100
 101 always_inline uword
 102 ipsec_if_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
 103                        vlib_frame_t * from_frame, int is_ip6)
 104 {
 105   ipsec_main_t *im = &ipsec_main;
 106   vnet_main_t *vnm = im->vnet_main;
 107   vnet_interface_main_t *vim = &vnm->interface_main;
 108
 109   int is_trace = node->flags & VLIB_NODE_FLAG_TRACE;
 110   u32 thread_index = vm->thread_index;
 111
 112   u32 n_left_from, *from;
 113   u16 nexts[VLIB_FRAME_SIZE], *next;
 114   vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
 115
 116   from = vlib_frame_vector_args (from_frame);
 117   n_left_from = from_frame->n_vectors;
 118
 119   vlib_get_buffers (vm, from, bufs, n_left_from);
 120   b = bufs;
 121   next = nexts;
 122
 123   clib_memset_u16 (nexts, im->esp4_decrypt_next_index, n_left_from);
 124
 125   u64 n_bytes = 0, n_packets = 0;
 126   u32 n_disabled = 0, n_no_tunnel = 0;
 127
 128   u32 last_sw_if_index = ~0;
 129   u32 last_tunnel_id = ~0;
 130   ipsec4_tunnel_key_t last_key4;
 131   ipsec6_tunnel_key_t last_key6;
 132
 133   vlib_combined_counter_main_t *rx_counter;
 134   vlib_combined_counter_main_t *drop_counter;
 135
 136   if (is_ip6)
 137     clib_memset (&last_key6, 0xff, sizeof (last_key6));
 138   else
 139     last_key4.as_u64 = ~0;
 140
 141   rx_counter = vim->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX;
 142   drop_counter = vim->combined_sw_if_counters + VNET_INTERFACE_COUNTER_DROP;
 143
 144   while (n_left_from >= 2)
 145     {
 146       u32 sw_if_index0, sw_if_index1;
 147       ip4_header_t *ip40, *ip41;
 148       ip6_header_t *ip60, *ip61;
 149       esp_header_t *esp0, *esp1;
 150       u32 len0, len1;
 151       u16 buf_adv0, buf_adv1;
 152       u32 tid0, tid1;
 153       ipsec_tunnel_if_t *t0, *t1;
 154       ipsec4_tunnel_key_t key40, key41;
 155       ipsec6_tunnel_key_t key60, key61;
 156
 157       if (n_left_from >= 4)
 158         {
 159           CLIB_PREFETCH (b[2], CLIB_CACHE_LINE_BYTES, STORE);
 160           CLIB_PREFETCH (b[2]->data, CLIB_CACHE_LINE_BYTES, LOAD);
 161           CLIB_PREFETCH (b[3], CLIB_CACHE_LINE_BYTES, STORE);
 162           CLIB_PREFETCH (b[3]->data, CLIB_CACHE_LINE_BYTES, LOAD);
 163         }
 164
 165       ip40 =
 166         (ip4_header_t *) (b[0]->data + vnet_buffer (b[0])->l3_hdr_offset);
 167       ip41 =
 168         (ip4_header_t *) (b[1]->data + vnet_buffer (b[1])->l3_hdr_offset);
 169
 170       if (is_ip6)
 171         {
 172           ip60 = (ip6_header_t *) ip40;
 173           ip61 = (ip6_header_t *) ip41;
 174           esp0 = (esp_header_t *) ((u8 *) ip60 + sizeof (ip6_header_t));
 175           esp1 = (esp_header_t *) ((u8 *) ip61 + sizeof (ip6_header_t));
 176           buf_adv0 = sizeof (ip6_header_t);
 177           buf_adv1 = sizeof (ip6_header_t);
 178         }
 179       else
 180         {
 181           /* NAT UDP port 4500 case, don't advance any more */
 182           if (ip40->protocol == IP_PROTOCOL_UDP)
 183             {
 184               esp0 =
 185                 (esp_header_t *) ((u8 *) ip40 + ip4_header_bytes (ip40) +
 186                                   sizeof (udp_header_t));
 187               buf_adv0 = 0;
 188             }
 189           else
 190             {
 191               esp0 = (esp_header_t *) ((u8 *) ip40 + ip4_header_bytes (ip40));
 192               buf_adv0 = ip4_header_bytes (ip40);
 193             }
 194           /* NAT UDP port 4500 case, don't advance any more */
 195           if (ip41->protocol == IP_PROTOCOL_UDP)
 196             {
 197               esp1 =
 198                 (esp_header_t *) ((u8 *) ip41 + ip4_header_bytes (ip41) +
 199                                   sizeof (udp_header_t));
 200               buf_adv1 = 0;
 201             }
 202           else
 203             {
 204               esp1 = (esp_header_t *) ((u8 *) ip41 + ip4_header_bytes (ip41));
 205               buf_adv1 = ip4_header_bytes (ip41);
 206             }
 207         }
 208
 209       vlib_buffer_advance (b[0], buf_adv0);
 210       vlib_buffer_advance (b[1], buf_adv1);
 211
 212       len0 = vlib_buffer_length_in_chain (vm, b[0]);
 213       len1 = vlib_buffer_length_in_chain (vm, b[1]);
 214
 215       if (is_ip6)
 216         {
 217           key60.remote_ip = ip60->src_address;
 218           key60.spi = esp0->spi;
 219
 220           if (memcmp (&key60, &last_key6, sizeof (last_key6)) == 0)
 221             {
 222               tid0 = last_tunnel_id;
 223             }
 224           else
 225             {
 226               uword *p =
 227                 hash_get_mem (im->ipsec6_if_pool_index_by_key, &key60);
 228               if (p)
 229                 {
 230                   tid0 = p[0];
 231                   last_tunnel_id = tid0;
 232                   clib_memcpy_fast (&last_key6, &key60, sizeof (key60));
 233                 }
 234               else
 235                 {
 236                   next[0] =
 237                     ipsec_ip6_if_no_tunnel (node, b[0], esp0, buf_adv0);
 238                   n_no_tunnel++;
 239                   goto pkt1;
 240                 }
 241             }
 242         }
 243       else                      /* !is_ip6 */
 244         {
 245           key40.remote_ip = ip40->src_address.as_u32;
 246           key40.spi = esp0->spi;
 247
 248           if (key40.as_u64 == last_key4.as_u64)
 249             {
 250               tid0 = last_tunnel_id;
 251             }
 252           else
 253             {
 254               uword *p =
 255                 hash_get (im->ipsec4_if_pool_index_by_key, key40.as_u64);
 256               if (p)
 257                 {
 258                   tid0 = p[0];
 259                   last_tunnel_id = tid0;
 260                   last_key4.as_u64 = key40.as_u64;
 261                 }
 262               else
 263                 {
 264                   next[0] =
 265                     ipsec_ip4_if_no_tunnel (node, b[0], esp0, ip40, buf_adv0);
 266                   n_no_tunnel++;
 267                   goto pkt1;
 268                 }
 269             }
 270         }
 271
 272       t0 = pool_elt_at_index (im->tunnel_interfaces, tid0);
 273       vnet_buffer (b[0])->ipsec.sad_index = t0->input_sa_index;
 274
 275       if (PREDICT_TRUE (t0->hw_if_index != ~0))
 276         {
 277           sw_if_index0 = t0->sw_if_index;
 278           vnet_buffer (b[0])->sw_if_index[VLIB_RX] = sw_if_index0;
 279
 280           if (PREDICT_FALSE (!(t0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP)))
 281             {
 282               vlib_increment_combined_counter
 283                 (drop_counter, thread_index, sw_if_index0, 1, len0);
 284               n_disabled++;
 285               b[0]->error = node->errors[IPSEC_IF_INPUT_ERROR_DISABLED];
 286               next[0] = IPSEC_INPUT_NEXT_DROP;
 287               goto pkt1;
 288             }
 289
 290           if (PREDICT_TRUE (sw_if_index0 == last_sw_if_index))
 291             {
 292               n_packets++;
 293               n_bytes += len0;
 294             }
 295           else
 296             {
 297               if (n_packets)
 298                 {
 299                   vlib_increment_combined_counter
 300                     (rx_counter, thread_index, last_sw_if_index,
 301                      n_packets, n_bytes);
 302                 }
 303
 304               last_sw_if_index = sw_if_index0;
 305               n_packets = 1;
 306               n_bytes = len0;
 307             }
 308         }
 309
 310     pkt1:
 311       if (is_ip6)
 312         {
 313           key61.remote_ip = ip61->src_address;
 314           key61.spi = esp1->spi;
 315
 316           if (memcmp (&key61, &last_key6, sizeof (last_key6)) == 0)
 317             {
 318               tid1 = last_tunnel_id;
 319             }
 320           else
 321             {
 322               uword *p =
 323                 hash_get_mem (im->ipsec6_if_pool_index_by_key, &key61);
 324               if (p)
 325                 {
 326                   tid1 = p[0];
 327                   last_tunnel_id = tid1;
 328                   clib_memcpy_fast (&last_key6, &key61, sizeof (key61));
 329                 }
 330               else
 331                 {
 332                   next[1] =
 333                     ipsec_ip6_if_no_tunnel (node, b[1], esp1, buf_adv1);
 334                   n_no_tunnel++;
 335                   goto trace1;
 336                 }
 337             }
 338         }
 339       else                      /* !is_ip6 */
 340         {
 341           key41.remote_ip = ip41->src_address.as_u32;
 342           key41.spi = esp1->spi;
 343
 344           if (key41.as_u64 == last_key4.as_u64)
 345             {
 346               tid1 = last_tunnel_id;
 347             }
 348           else
 349             {
 350               uword *p =
 351                 hash_get (im->ipsec4_if_pool_index_by_key, key41.as_u64);
 352               if (p)
 353                 {
 354                   tid1 = p[0];
 355                   last_tunnel_id = tid1;
 356                   last_key4.as_u64 = key41.as_u64;
 357                 }
 358               else
 359                 {
 360                   next[1] =
 361                     ipsec_ip4_if_no_tunnel (node, b[1], esp1, ip41, buf_adv1);
 362                   n_no_tunnel++;
 363                   goto trace1;
 364                 }
 365             }
 366         }
 367
 368       t1 = pool_elt_at_index (im->tunnel_interfaces, tid1);
 369       vnet_buffer (b[1])->ipsec.sad_index = t1->input_sa_index;
 370
 371       if (PREDICT_TRUE (t1->hw_if_index != ~0))
 372         {
 373           sw_if_index1 = t1->sw_if_index;
 374           vnet_buffer (b[1])->sw_if_index[VLIB_RX] = sw_if_index1;
 375
 376           if (PREDICT_FALSE (!(t1->flags & VNET_HW_INTERFACE_FLAG_LINK_UP)))
 377             {
 378               vlib_increment_combined_counter
 379                 (drop_counter, thread_index, sw_if_index1, 1, len1);
 380               n_disabled++;
 381               b[1]->error = node->errors[IPSEC_IF_INPUT_ERROR_DISABLED];
 382               next[1] = IPSEC_INPUT_NEXT_DROP;
 383               goto trace1;
 384             }
 385
 386           if (PREDICT_TRUE (sw_if_index1 == last_sw_if_index))
 387             {
 388               n_packets++;
 389               n_bytes += len1;
 390             }
 391           else
 392             {
 393               if (n_packets)
 394                 {
 395                   vlib_increment_combined_counter
 396                     (rx_counter, thread_index, last_sw_if_index,
 397                      n_packets, n_bytes);
 398                 }
 399
 400               last_sw_if_index = sw_if_index1;
 401               n_packets = 1;
 402               n_bytes = len1;
 403             }
 404         }
 405
 406     trace1:
 407       if (PREDICT_FALSE (is_trace))
 408         {
 409           if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
 410             {
 411               ipsec_if_input_trace_t *tr =
 412                 vlib_add_trace (vm, node, b[0], sizeof (*tr));
 413               tr->spi = clib_host_to_net_u32 (esp0->spi);
 414               tr->seq = clib_host_to_net_u32 (esp0->seq);
 415             }
 416           if (b[1]->flags & VLIB_BUFFER_IS_TRACED)
 417             {
 418               ipsec_if_input_trace_t *tr =
 419                 vlib_add_trace (vm, node, b[1], sizeof (*tr));
 420               tr->spi = clib_host_to_net_u32 (esp1->spi);
 421               tr->seq = clib_host_to_net_u32 (esp1->seq);
 422             }
 423         }
 424
 425       /* next */
 426       b += 2;
 427       next += 2;
 428       n_left_from -= 2;
 429     }
 430   while (n_left_from > 0)
 431     {
 432       u32 sw_if_index0;
 433       ip4_header_t *ip40;
 434       ip6_header_t *ip60;
 435       esp_header_t *esp0;
 436       u32 len0;
 437       u16 buf_adv0, buf_rewind0;
 438       u32 tid0;
 439       ipsec_tunnel_if_t *t0;
 440       ipsec4_tunnel_key_t key40;
 441       ipsec6_tunnel_key_t key60;
 442
 443       ip40 =
 444         (ip4_header_t *) (b[0]->data + vnet_buffer (b[0])->l3_hdr_offset);
 445
 446       if (is_ip6)
 447         {
 448           ip60 = (ip6_header_t *) ip40;
 449           esp0 = (esp_header_t *) ((u8 *) ip60 + sizeof (ip6_header_t));
 450           buf_adv0 = sizeof (ip6_header_t);
 451         }
 452       else
 453         {
 454           /* NAT UDP port 4500 case, don't advance any more */
 455           if (ip40->protocol == IP_PROTOCOL_UDP)
 456             {
 457               esp0 =
 458                 (esp_header_t *) ((u8 *) ip40 + ip4_header_bytes (ip40) +
 459                                   sizeof (udp_header_t));
 460               buf_adv0 = 0;
 461               buf_rewind0 = ip4_header_bytes (ip40) + sizeof (udp_header_t);
 462             }
 463           else
 464             {
 465               esp0 = (esp_header_t *) ((u8 *) ip40 + ip4_header_bytes (ip40));
 466               buf_rewind0 = buf_adv0 = ip4_header_bytes (ip40);
 467             }
 468         }
 469
 470       /* stats for the tunnel include all the data after the IP header
 471          just like a norml IP-IP tunnel */
 472       vlib_buffer_advance (b[0], buf_adv0);
 473       len0 = vlib_buffer_length_in_chain (vm, b[0]);
 474
 475       if (is_ip6)
 476         {
 477           key60.remote_ip = ip60->src_address;
 478           key60.spi = esp0->spi;
 479
 480           if (memcmp (&key60, &last_key6, sizeof (last_key6)) == 0)
 481             {
 482               tid0 = last_tunnel_id;
 483             }
 484           else
 485             {
 486               uword *p =
 487                 hash_get_mem (im->ipsec6_if_pool_index_by_key, &key60);
 488               if (p)
 489                 {
 490                   tid0 = p[0];
 491                   last_tunnel_id = tid0;
 492                   clib_memcpy_fast (&last_key6, &key60, sizeof (key60));
 493                 }
 494               else
 495                 {
 496                   next[0] =
 497                     ipsec_ip6_if_no_tunnel (node, b[0], esp0, buf_adv0);
 498                   n_no_tunnel++;
 499                   goto trace00;
 500                 }
 501             }
 502         }
 503       else                      /* !is_ip6 */
 504         {
 505           key40.remote_ip = ip40->src_address.as_u32;
 506           key40.spi = esp0->spi;
 507
 508           if (key40.as_u64 == last_key4.as_u64)
 509             {
 510               tid0 = last_tunnel_id;
 511             }
 512           else
 513             {
 514               uword *p =
 515                 hash_get (im->ipsec4_if_pool_index_by_key, key40.as_u64);
 516               if (p)
 517                 {
 518                   tid0 = p[0];
 519                   last_tunnel_id = tid0;
 520                   last_key4.as_u64 = key40.as_u64;
 521                 }
 522               else
 523                 {
 524                   next[0] =
 525                     ipsec_ip4_if_no_tunnel (node, b[0], esp0, ip40,
 526                                             buf_rewind0);
 527                   n_no_tunnel++;
 528                   goto trace00;
 529                 }
 530             }
 531         }
 532
 533       t0 = pool_elt_at_index (im->tunnel_interfaces, tid0);
 534       vnet_buffer (b[0])->ipsec.sad_index = t0->input_sa_index;
 535
 536       if (PREDICT_TRUE (t0->hw_if_index != ~0))
 537         {
 538           sw_if_index0 = t0->sw_if_index;
 539           vnet_buffer (b[0])->sw_if_index[VLIB_RX] = sw_if_index0;
 540
 541           if (PREDICT_FALSE (!(t0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP)))
 542             {
 543               vlib_increment_combined_counter
 544                 (drop_counter, thread_index, sw_if_index0, 1, len0);
 545               n_disabled++;
 546               b[0]->error = node->errors[IPSEC_IF_INPUT_ERROR_DISABLED];
 547               next[0] = IPSEC_INPUT_NEXT_DROP;
 548               goto trace00;
 549             }
 550
 551           if (PREDICT_TRUE (sw_if_index0 == last_sw_if_index))
 552             {
 553               n_packets++;
 554               n_bytes += len0;
 555             }
 556           else
 557             {
 558               if (n_packets)
 559                 {
 560                   vlib_increment_combined_counter
 561                     (rx_counter, thread_index, last_sw_if_index,
 562                      n_packets, n_bytes);
 563                 }
 564
 565               last_sw_if_index = sw_if_index0;
 566               n_packets = 1;
 567               n_bytes = len0;
 568             }
 569         }
 570
 571     trace00:
 572       if (PREDICT_FALSE (is_trace))
 573         {
 574           if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
 575             {
 576               ipsec_if_input_trace_t *tr =
 577                 vlib_add_trace (vm, node, b[0], sizeof (*tr));
 578               tr->spi = clib_host_to_net_u32 (esp0->spi);
 579               tr->seq = clib_host_to_net_u32 (esp0->seq);
 580             }
 581         }
 582
 583       /* next */
 584       b += 1;
 585       next += 1;
 586       n_left_from -= 1;
 587     }
 588
 589   if (n_packets)
 590     {
 591       vlib_increment_combined_counter (rx_counter,
 592                                        thread_index,
 593                                        last_sw_if_index, n_packets, n_bytes);
 594     }
 595
 596   vlib_node_increment_counter (vm, node->node_index,
 597                                IPSEC_IF_INPUT_ERROR_RX,
 598                                from_frame->n_vectors - (n_disabled +
 599                                                         n_no_tunnel));
 600
 601   vlib_buffer_enqueue_to_next (vm, node, from, nexts, from_frame->n_vectors);
 602
 603   return from_frame->n_vectors;
 604 }
 605
 606 VLIB_NODE_FN (ipsec4_if_input_node) (vlib_main_t * vm,
 607                                      vlib_node_runtime_t * node,
 608                                      vlib_frame_t * from_frame)
 609 {
 610   return ipsec_if_input_inline (vm, node, from_frame, 0 /* is_ip6 */ );
 611 }
 612
 613 /* *INDENT-OFF* */
 614 VLIB_REGISTER_NODE (ipsec4_if_input_node) = {
 615   .name = "ipsec4-if-input",
 616   .vector_size = sizeof (u32),
 617   .format_trace = format_ipsec_if_input_trace,
 618   .type = VLIB_NODE_TYPE_INTERNAL,
 619   .n_errors = ARRAY_LEN(ipsec_if_input_error_strings),
 620   .error_strings = ipsec_if_input_error_strings,
 621   .sibling_of = "ipsec4-input-feature",
 622 };
 623 /* *INDENT-ON* */
 624
 625 VLIB_NODE_FN (ipsec6_if_input_node) (vlib_main_t * vm,
 626                                      vlib_node_runtime_t * node,
 627                                      vlib_frame_t * from_frame)
 628 {
 629   return ipsec_if_input_inline (vm, node, from_frame, 1 /* is_ip6 */ );
 630 }
 631
 632 /* *INDENT-OFF* */
 633 VLIB_REGISTER_NODE (ipsec6_if_input_node) = {
 634   .name = "ipsec6-if-input",
 635   .vector_size = sizeof (u32),
 636   .format_trace = format_ipsec_if_input_trace,
 637   .type = VLIB_NODE_TYPE_INTERNAL,
 638   .n_errors = ARRAY_LEN(ipsec_if_input_error_strings),
 639   .error_strings = ipsec_if_input_error_strings,
 640   .sibling_of = "ipsec6-input-feature",
 641 };
 642 /* *INDENT-ON* */
 643
 644 /*
 645  * fd.io coding-style-patch-verification: ON
 646  *
 647  * Local Variables:
 648  * eval: (c-set-style "gnu")
 649  * End:
 650  */