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       u16 buf_rewind0, buf_rewind1;
 153       u32 tid0, tid1;
 154       ipsec_tunnel_if_t *t0, *t1;
 155       ipsec4_tunnel_key_t key40, key41;
 156       ipsec6_tunnel_key_t key60, key61;
 157
 158       if (n_left_from >= 4)
 159         {
 160           CLIB_PREFETCH (b[2], CLIB_CACHE_LINE_BYTES, STORE);
 161           CLIB_PREFETCH (b[2]->data, CLIB_CACHE_LINE_BYTES, LOAD);
 162           CLIB_PREFETCH (b[3], CLIB_CACHE_LINE_BYTES, STORE);
 163           CLIB_PREFETCH (b[3]->data, CLIB_CACHE_LINE_BYTES, LOAD);
 164         }
 165
 166       ip40 =
 167         (ip4_header_t *) (b[0]->data + vnet_buffer (b[0])->l3_hdr_offset);
 168       ip41 =
 169         (ip4_header_t *) (b[1]->data + vnet_buffer (b[1])->l3_hdr_offset);
 170
 171       if (is_ip6)
 172         {
 173           ip60 = (ip6_header_t *) ip40;
 174           ip61 = (ip6_header_t *) ip41;
 175           esp0 = (esp_header_t *) ((u8 *) ip60 + sizeof (ip6_header_t));
 176           esp1 = (esp_header_t *) ((u8 *) ip61 + sizeof (ip6_header_t));
 177           buf_adv0 = sizeof (ip6_header_t);
 178           buf_adv1 = sizeof (ip6_header_t);
 179         }
 180       else
 181         {
 182           /* NAT UDP port 4500 case, don't advance any more */
 183           if (ip40->protocol == IP_PROTOCOL_UDP)
 184             {
 185               esp0 =
 186                 (esp_header_t *) ((u8 *) ip40 + ip4_header_bytes (ip40) +
 187                                   sizeof (udp_header_t));
 188               buf_adv0 = 0;
 189               buf_rewind0 = ip4_header_bytes (ip40) + sizeof (udp_header_t);
 190             }
 191           else
 192             {
 193               esp0 = (esp_header_t *) ((u8 *) ip40 + ip4_header_bytes (ip40));
 194               buf_rewind0 = buf_adv0 = ip4_header_bytes (ip40);
 195             }
 196           /* NAT UDP port 4500 case, don't advance any more */
 197           if (ip41->protocol == IP_PROTOCOL_UDP)
 198             {
 199               esp1 =
 200                 (esp_header_t *) ((u8 *) ip41 + ip4_header_bytes (ip41) +
 201                                   sizeof (udp_header_t));
 202               buf_adv1 = 0;
 203               buf_rewind1 = ip4_header_bytes (ip40) + sizeof (udp_header_t);
 204             }
 205           else
 206             {
 207               esp1 = (esp_header_t *) ((u8 *) ip41 + ip4_header_bytes (ip41));
 208               buf_rewind1 = buf_adv1 = ip4_header_bytes (ip41);
 209             }
 210         }
 211
 212       vlib_buffer_advance (b[0], buf_adv0);
 213       vlib_buffer_advance (b[1], buf_adv1);
 214
 215       len0 = vlib_buffer_length_in_chain (vm, b[0]);
 216       len1 = vlib_buffer_length_in_chain (vm, b[1]);
 217
 218       if (is_ip6)
 219         {
 220           key60.remote_ip = ip60->src_address;
 221           key60.spi = esp0->spi;
 222
 223           if (memcmp (&key60, &last_key6, sizeof (last_key6)) == 0)
 224             {
 225               tid0 = last_tunnel_id;
 226             }
 227           else
 228             {
 229               uword *p =
 230                 hash_get_mem (im->ipsec6_if_pool_index_by_key, &key60);
 231               if (p)
 232                 {
 233                   tid0 = p[0];
 234                   last_tunnel_id = tid0;
 235                   clib_memcpy_fast (&last_key6, &key60, sizeof (key60));
 236                 }
 237               else
 238                 {
 239                   next[0] =
 240                     ipsec_ip6_if_no_tunnel (node, b[0], esp0, buf_adv0);
 241                   n_no_tunnel++;
 242                   goto pkt1;
 243                 }
 244             }
 245         }
 246       else                      /* !is_ip6 */
 247         {
 248           key40.remote_ip = ip40->src_address.as_u32;
 249           key40.spi = esp0->spi;
 250
 251           if (key40.as_u64 == last_key4.as_u64)
 252             {
 253               tid0 = last_tunnel_id;
 254             }
 255           else
 256             {
 257               uword *p =
 258                 hash_get (im->ipsec4_if_pool_index_by_key, key40.as_u64);
 259               if (p)
 260                 {
 261                   tid0 = p[0];
 262                   last_tunnel_id = tid0;
 263                   last_key4.as_u64 = key40.as_u64;
 264                 }
 265               else
 266                 {
 267                   next[0] =
 268                     ipsec_ip4_if_no_tunnel (node, b[0], esp0, ip40,
 269                                             buf_rewind0);
 270                   n_no_tunnel++;
 271                   goto pkt1;
 272                 }
 273             }
 274         }
 275
 276       t0 = pool_elt_at_index (im->tunnel_interfaces, tid0);
 277       vnet_buffer (b[0])->ipsec.sad_index = t0->input_sa_index;
 278
 279       if (PREDICT_TRUE (t0->hw_if_index != ~0))
 280         {
 281           sw_if_index0 = t0->sw_if_index;
 282           vnet_buffer (b[0])->sw_if_index[VLIB_RX] = sw_if_index0;
 283
 284           if (PREDICT_FALSE (!(t0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP)))
 285             {
 286               vlib_increment_combined_counter
 287                 (drop_counter, thread_index, sw_if_index0, 1, len0);
 288               n_disabled++;
 289               b[0]->error = node->errors[IPSEC_IF_INPUT_ERROR_DISABLED];
 290               next[0] = IPSEC_INPUT_NEXT_DROP;
 291               goto pkt1;
 292             }
 293
 294           if (PREDICT_TRUE (sw_if_index0 == last_sw_if_index))
 295             {
 296               n_packets++;
 297               n_bytes += len0;
 298             }
 299           else
 300             {
 301               if (n_packets)
 302                 {
 303                   vlib_increment_combined_counter
 304                     (rx_counter, thread_index, last_sw_if_index,
 305                      n_packets, n_bytes);
 306                 }
 307
 308               last_sw_if_index = sw_if_index0;
 309               n_packets = 1;
 310               n_bytes = len0;
 311             }
 312         }
 313
 314     pkt1:
 315       if (is_ip6)
 316         {
 317           key61.remote_ip = ip61->src_address;
 318           key61.spi = esp1->spi;
 319
 320           if (memcmp (&key61, &last_key6, sizeof (last_key6)) == 0)
 321             {
 322               tid1 = last_tunnel_id;
 323             }
 324           else
 325             {
 326               uword *p =
 327                 hash_get_mem (im->ipsec6_if_pool_index_by_key, &key61);
 328               if (p)
 329                 {
 330                   tid1 = p[0];
 331                   last_tunnel_id = tid1;
 332                   clib_memcpy_fast (&last_key6, &key61, sizeof (key61));
 333                 }
 334               else
 335                 {
 336                   next[1] =
 337                     ipsec_ip6_if_no_tunnel (node, b[1], esp1, buf_adv1);
 338                   n_no_tunnel++;
 339                   goto trace1;
 340                 }
 341             }
 342         }
 343       else                      /* !is_ip6 */
 344         {
 345           key41.remote_ip = ip41->src_address.as_u32;
 346           key41.spi = esp1->spi;
 347
 348           if (key41.as_u64 == last_key4.as_u64)
 349             {
 350               tid1 = last_tunnel_id;
 351             }
 352           else
 353             {
 354               uword *p =
 355                 hash_get (im->ipsec4_if_pool_index_by_key, key41.as_u64);
 356               if (p)
 357                 {
 358                   tid1 = p[0];
 359                   last_tunnel_id = tid1;
 360                   last_key4.as_u64 = key41.as_u64;
 361                 }
 362               else
 363                 {
 364                   next[1] =
 365                     ipsec_ip4_if_no_tunnel (node, b[1], esp1, ip41,
 366                                             buf_rewind1);
 367                   n_no_tunnel++;
 368                   goto trace1;
 369                 }
 370             }
 371         }
 372
 373       t1 = pool_elt_at_index (im->tunnel_interfaces, tid1);
 374       vnet_buffer (b[1])->ipsec.sad_index = t1->input_sa_index;
 375
 376       if (PREDICT_TRUE (t1->hw_if_index != ~0))
 377         {
 378           sw_if_index1 = t1->sw_if_index;
 379           vnet_buffer (b[1])->sw_if_index[VLIB_RX] = sw_if_index1;
 380
 381           if (PREDICT_FALSE (!(t1->flags & VNET_HW_INTERFACE_FLAG_LINK_UP)))
 382             {
 383               vlib_increment_combined_counter
 384                 (drop_counter, thread_index, sw_if_index1, 1, len1);
 385               n_disabled++;
 386               b[1]->error = node->errors[IPSEC_IF_INPUT_ERROR_DISABLED];
 387               next[1] = IPSEC_INPUT_NEXT_DROP;
 388               goto trace1;
 389             }
 390
 391           if (PREDICT_TRUE (sw_if_index1 == last_sw_if_index))
 392             {
 393               n_packets++;
 394               n_bytes += len1;
 395             }
 396           else
 397             {
 398               if (n_packets)
 399                 {
 400                   vlib_increment_combined_counter
 401                     (rx_counter, thread_index, last_sw_if_index,
 402                      n_packets, n_bytes);
 403                 }
 404
 405               last_sw_if_index = sw_if_index1;
 406               n_packets = 1;
 407               n_bytes = len1;
 408             }
 409         }
 410
 411     trace1:
 412       if (PREDICT_FALSE (is_trace))
 413         {
 414           if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
 415             {
 416               ipsec_if_input_trace_t *tr =
 417                 vlib_add_trace (vm, node, b[0], sizeof (*tr));
 418               tr->spi = clib_host_to_net_u32 (esp0->spi);
 419               tr->seq = clib_host_to_net_u32 (esp0->seq);
 420             }
 421           if (b[1]->flags & VLIB_BUFFER_IS_TRACED)
 422             {
 423               ipsec_if_input_trace_t *tr =
 424                 vlib_add_trace (vm, node, b[1], sizeof (*tr));
 425               tr->spi = clib_host_to_net_u32 (esp1->spi);
 426               tr->seq = clib_host_to_net_u32 (esp1->seq);
 427             }
 428         }
 429
 430       /* next */
 431       b += 2;
 432       next += 2;
 433       n_left_from -= 2;
 434     }
 435   while (n_left_from > 0)
 436     {
 437       u32 sw_if_index0;
 438       ip4_header_t *ip40;
 439       ip6_header_t *ip60;
 440       esp_header_t *esp0;
 441       u32 len0;
 442       u16 buf_adv0, buf_rewind0;
 443       u32 tid0;
 444       ipsec_tunnel_if_t *t0;
 445       ipsec4_tunnel_key_t key40;
 446       ipsec6_tunnel_key_t key60;
 447
 448       ip40 =
 449         (ip4_header_t *) (b[0]->data + vnet_buffer (b[0])->l3_hdr_offset);
 450
 451       if (is_ip6)
 452         {
 453           ip60 = (ip6_header_t *) ip40;
 454           esp0 = (esp_header_t *) ((u8 *) ip60 + sizeof (ip6_header_t));
 455           buf_adv0 = sizeof (ip6_header_t);
 456         }
 457       else
 458         {
 459           /* NAT UDP port 4500 case, don't advance any more */
 460           if (ip40->protocol == IP_PROTOCOL_UDP)
 461             {
 462               esp0 =
 463                 (esp_header_t *) ((u8 *) ip40 + ip4_header_bytes (ip40) +
 464                                   sizeof (udp_header_t));
 465               buf_adv0 = 0;
 466               buf_rewind0 = ip4_header_bytes (ip40) + sizeof (udp_header_t);
 467             }
 468           else
 469             {
 470               esp0 = (esp_header_t *) ((u8 *) ip40 + ip4_header_bytes (ip40));
 471               buf_rewind0 = buf_adv0 = ip4_header_bytes (ip40);
 472             }
 473         }
 474
 475       /* stats for the tunnel include all the data after the IP header
 476          just like a norml IP-IP tunnel */
 477       vlib_buffer_advance (b[0], buf_adv0);
 478       len0 = vlib_buffer_length_in_chain (vm, b[0]);
 479
 480       if (is_ip6)
 481         {
 482           key60.remote_ip = ip60->src_address;
 483           key60.spi = esp0->spi;
 484
 485           if (memcmp (&key60, &last_key6, sizeof (last_key6)) == 0)
 486             {
 487               tid0 = last_tunnel_id;
 488             }
 489           else
 490             {
 491               uword *p =
 492                 hash_get_mem (im->ipsec6_if_pool_index_by_key, &key60);
 493               if (p)
 494                 {
 495                   tid0 = p[0];
 496                   last_tunnel_id = tid0;
 497                   clib_memcpy_fast (&last_key6, &key60, sizeof (key60));
 498                 }
 499               else
 500                 {
 501                   next[0] =
 502                     ipsec_ip6_if_no_tunnel (node, b[0], esp0, buf_adv0);
 503                   n_no_tunnel++;
 504                   goto trace00;
 505                 }
 506             }
 507         }
 508       else                      /* !is_ip6 */
 509         {
 510           key40.remote_ip = ip40->src_address.as_u32;
 511           key40.spi = esp0->spi;
 512
 513           if (key40.as_u64 == last_key4.as_u64)
 514             {
 515               tid0 = last_tunnel_id;
 516             }
 517           else
 518             {
 519               uword *p =
 520                 hash_get (im->ipsec4_if_pool_index_by_key, key40.as_u64);
 521               if (p)
 522                 {
 523                   tid0 = p[0];
 524                   last_tunnel_id = tid0;
 525                   last_key4.as_u64 = key40.as_u64;
 526                 }
 527               else
 528                 {
 529                   next[0] =
 530                     ipsec_ip4_if_no_tunnel (node, b[0], esp0, ip40,
 531                                             buf_rewind0);
 532                   n_no_tunnel++;
 533                   goto trace00;
 534                 }
 535             }
 536         }
 537
 538       t0 = pool_elt_at_index (im->tunnel_interfaces, tid0);
 539       vnet_buffer (b[0])->ipsec.sad_index = t0->input_sa_index;
 540
 541       if (PREDICT_TRUE (t0->hw_if_index != ~0))
 542         {
 543           sw_if_index0 = t0->sw_if_index;
 544           vnet_buffer (b[0])->sw_if_index[VLIB_RX] = sw_if_index0;
 545
 546           if (PREDICT_FALSE (!(t0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP)))
 547             {
 548               vlib_increment_combined_counter
 549                 (drop_counter, thread_index, sw_if_index0, 1, len0);
 550               n_disabled++;
 551               b[0]->error = node->errors[IPSEC_IF_INPUT_ERROR_DISABLED];
 552               next[0] = IPSEC_INPUT_NEXT_DROP;
 553               goto trace00;
 554             }
 555
 556           if (PREDICT_TRUE (sw_if_index0 == last_sw_if_index))
 557             {
 558               n_packets++;
 559               n_bytes += len0;
 560             }
 561           else
 562             {
 563               if (n_packets)
 564                 {
 565                   vlib_increment_combined_counter
 566                     (rx_counter, thread_index, last_sw_if_index,
 567                      n_packets, n_bytes);
 568                 }
 569
 570               last_sw_if_index = sw_if_index0;
 571               n_packets = 1;
 572               n_bytes = len0;
 573             }
 574         }
 575
 576     trace00:
 577       if (PREDICT_FALSE (is_trace))
 578         {
 579           if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
 580             {
 581               ipsec_if_input_trace_t *tr =
 582                 vlib_add_trace (vm, node, b[0], sizeof (*tr));
 583               tr->spi = clib_host_to_net_u32 (esp0->spi);
 584               tr->seq = clib_host_to_net_u32 (esp0->seq);
 585             }
 586         }
 587
 588       /* next */
 589       b += 1;
 590       next += 1;
 591       n_left_from -= 1;
 592     }
 593
 594   if (n_packets)
 595     {
 596       vlib_increment_combined_counter (rx_counter,
 597                                        thread_index,
 598                                        last_sw_if_index, n_packets, n_bytes);
 599     }
 600
 601   vlib_node_increment_counter (vm, node->node_index,
 602                                IPSEC_IF_INPUT_ERROR_RX,
 603                                from_frame->n_vectors - (n_disabled +
 604                                                         n_no_tunnel));
 605
 606   vlib_buffer_enqueue_to_next (vm, node, from, nexts, from_frame->n_vectors);
 607
 608   return from_frame->n_vectors;
 609 }
 610
 611 VLIB_NODE_FN (ipsec4_if_input_node) (vlib_main_t * vm,
 612                                      vlib_node_runtime_t * node,
 613                                      vlib_frame_t * from_frame)
 614 {
 615   return ipsec_if_input_inline (vm, node, from_frame, 0 /* is_ip6 */ );
 616 }
 617
 618 /* *INDENT-OFF* */
 619 VLIB_REGISTER_NODE (ipsec4_if_input_node) = {
 620   .name = "ipsec4-if-input",
 621   .vector_size = sizeof (u32),
 622   .format_trace = format_ipsec_if_input_trace,
 623   .type = VLIB_NODE_TYPE_INTERNAL,
 624   .n_errors = ARRAY_LEN(ipsec_if_input_error_strings),
 625   .error_strings = ipsec_if_input_error_strings,
 626   .sibling_of = "ipsec4-input-feature",
 627 };
 628 /* *INDENT-ON* */
 629
 630 VLIB_NODE_FN (ipsec6_if_input_node) (vlib_main_t * vm,
 631                                      vlib_node_runtime_t * node,
 632                                      vlib_frame_t * from_frame)
 633 {
 634   return ipsec_if_input_inline (vm, node, from_frame, 1 /* is_ip6 */ );
 635 }
 636
 637 /* *INDENT-OFF* */
 638 VLIB_REGISTER_NODE (ipsec6_if_input_node) = {
 639   .name = "ipsec6-if-input",
 640   .vector_size = sizeof (u32),
 641   .format_trace = format_ipsec_if_input_trace,
 642   .type = VLIB_NODE_TYPE_INTERNAL,
 643   .n_errors = ARRAY_LEN(ipsec_if_input_error_strings),
 644   .error_strings = ipsec_if_input_error_strings,
 645   .sibling_of = "ipsec6-input-feature",
 646 };
 647 /* *INDENT-ON* */
 648
 649 /*
 650  * fd.io coding-style-patch-verification: ON
 651  *
 652  * Local Variables:
 653  * eval: (c-set-style "gnu")
 654  * End:
 655  */