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 _(NAT_KEEPALIVE, "NAT Keepalive")                                 \
  33 _(TOO_SHORT, "Too Short")                                         \
  34 _(SPI_0, "SPI 0")
  35
  36 static char *ipsec_if_input_error_strings[] = {
  37 #define _(sym,string) string,
  38   foreach_ipsec_if_input_error
  39 #undef _
  40 };
  41
  42 typedef enum
  43 {
  44 #define _(sym,str) IPSEC_IF_INPUT_ERROR_##sym,
  45   foreach_ipsec_if_input_error
  46 #undef _
  47     IPSEC_IF_INPUT_N_ERROR,
  48 } ipsec_if_input_error_t;
  49
  50
  51 typedef struct
  52 {
  53   union
  54   {
  55     ipsec4_tunnel_key_t key4;
  56     ipsec6_tunnel_key_t key6;
  57   };
  58   u8 is_ip6;
  59   u32 seq;
  60 } ipsec_if_input_trace_t;
  61
  62 static u8 *
  63 format_ipsec_if_input_trace (u8 * s, va_list * args)
  64 {
  65   CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
  66   CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
  67   ipsec_if_input_trace_t *t = va_arg (*args, ipsec_if_input_trace_t *);
  68
  69   if (t->is_ip6)
  70     s = format (s, "IPSec: %U seq %u",
  71                 format_ipsec6_tunnel_key, &t->key6, t->seq);
  72   else
  73     s = format (s, "IPSec: %U seq %u",
  74                 format_ipsec4_tunnel_key, &t->key4, t->seq);
  75   return s;
  76 }
  77
  78 always_inline u16
  79 ipsec_ip4_if_no_tunnel (vlib_node_runtime_t * node,
  80                         vlib_buffer_t * b,
  81                         const esp_header_t * esp,
  82                         const ip4_header_t * ip4, u16 offset)
  83 {
  84   if (PREDICT_FALSE (0 == esp->spi))
  85     {
  86       b->error = node->errors[IPSEC_IF_INPUT_ERROR_SPI_0];
  87       b->punt_reason =
  88         ipsec_punt_reason[(ip4->protocol == IP_PROTOCOL_UDP ?
  89                            IPSEC_PUNT_IP4_SPI_UDP_0 :
  90                            IPSEC_PUNT_IP4_NO_SUCH_TUNNEL)];
  91     }
  92   else
  93     {
  94       b->error = node->errors[IPSEC_IF_INPUT_ERROR_NO_TUNNEL];
  95       b->punt_reason = ipsec_punt_reason[IPSEC_PUNT_IP4_NO_SUCH_TUNNEL];
  96     }
  97   vlib_buffer_advance (b, -offset);
  98   return IPSEC_INPUT_NEXT_PUNT;
  99 }
 100
 101 always_inline u16
 102 ipsec_ip6_if_no_tunnel (vlib_node_runtime_t * node,
 103                         vlib_buffer_t * b,
 104                         const esp_header_t * esp, u16 offset)
 105 {
 106   b->error = node->errors[IPSEC_IF_INPUT_ERROR_NO_TUNNEL];
 107   b->punt_reason = ipsec_punt_reason[IPSEC_PUNT_IP6_NO_SUCH_TUNNEL];
 108
 109   vlib_buffer_advance (b, -offset);
 110   return (IPSEC_INPUT_NEXT_PUNT);
 111 }
 112
 113 always_inline uword
 114 ipsec_if_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
 115                        vlib_frame_t * from_frame, int is_ip6)
 116 {
 117   ipsec_main_t *im = &ipsec_main;
 118   vnet_main_t *vnm = im->vnet_main;
 119   vnet_interface_main_t *vim = &vnm->interface_main;
 120
 121   int is_trace = node->flags & VLIB_NODE_FLAG_TRACE;
 122   u32 thread_index = vm->thread_index;
 123
 124   u32 n_left_from, *from;
 125   u16 nexts[VLIB_FRAME_SIZE], *next;
 126   vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
 127
 128   from = vlib_frame_vector_args (from_frame);
 129   n_left_from = from_frame->n_vectors;
 130
 131   vlib_get_buffers (vm, from, bufs, n_left_from);
 132   b = bufs;
 133   next = nexts;
 134
 135   clib_memset_u16 (nexts, im->esp4_decrypt_next_index, n_left_from);
 136
 137   u64 n_bytes = 0, n_packets = 0;
 138   u32 n_disabled = 0, n_no_tunnel = 0;
 139
 140   u32 last_sw_if_index = ~0;
 141   u32 last_tunnel_id = ~0;
 142   ipsec4_tunnel_key_t last_key4;
 143   ipsec6_tunnel_key_t last_key6;
 144
 145   vlib_combined_counter_main_t *rx_counter;
 146   vlib_combined_counter_main_t *drop_counter;
 147
 148   if (is_ip6)
 149     clib_memset (&last_key6, 0xff, sizeof (last_key6));
 150   else
 151     last_key4.as_u64 = ~0;
 152
 153   rx_counter = vim->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX;
 154   drop_counter = vim->combined_sw_if_counters + VNET_INTERFACE_COUNTER_DROP;
 155
 156   while (n_left_from >= 2)
 157     {
 158       u32 sw_if_index0, sw_if_index1;
 159       ip4_header_t *ip40, *ip41;
 160       ip6_header_t *ip60, *ip61;
 161       esp_header_t *esp0, *esp1;
 162       u32 len0, len1;
 163       u16 buf_adv0, buf_adv1;
 164       u16 buf_rewind0, buf_rewind1;
 165       u32 tid0, tid1;
 166       ipsec_tunnel_if_t *t0, *t1;
 167       ipsec4_tunnel_key_t key40, key41;
 168       ipsec6_tunnel_key_t key60, key61;
 169
 170       if (n_left_from >= 4)
 171         {
 172           CLIB_PREFETCH (b[2], CLIB_CACHE_LINE_BYTES, STORE);
 173           CLIB_PREFETCH (b[2]->data, CLIB_CACHE_LINE_BYTES, LOAD);
 174           CLIB_PREFETCH (b[3], CLIB_CACHE_LINE_BYTES, STORE);
 175           CLIB_PREFETCH (b[3]->data, CLIB_CACHE_LINE_BYTES, LOAD);
 176         }
 177
 178       ip40 =
 179         (ip4_header_t *) (b[0]->data + vnet_buffer (b[0])->l3_hdr_offset);
 180       ip41 =
 181         (ip4_header_t *) (b[1]->data + vnet_buffer (b[1])->l3_hdr_offset);
 182
 183       if (is_ip6)
 184         {
 185           ip60 = (ip6_header_t *) ip40;
 186           ip61 = (ip6_header_t *) ip41;
 187           esp0 = (esp_header_t *) ((u8 *) ip60 + sizeof (ip6_header_t));
 188           esp1 = (esp_header_t *) ((u8 *) ip61 + sizeof (ip6_header_t));
 189           buf_adv0 = sizeof (ip6_header_t);
 190           buf_adv1 = sizeof (ip6_header_t);
 191         }
 192       else
 193         {
 194           /* NAT UDP port 4500 case, don't advance any more */
 195           if (ip40->protocol == IP_PROTOCOL_UDP)
 196             {
 197               esp0 =
 198                 (esp_header_t *) ((u8 *) ip40 + ip4_header_bytes (ip40) +
 199                                   sizeof (udp_header_t));
 200               buf_adv0 = 0;
 201               buf_rewind0 = ip4_header_bytes (ip40) + sizeof (udp_header_t);
 202             }
 203           else
 204             {
 205               esp0 = (esp_header_t *) ((u8 *) ip40 + ip4_header_bytes (ip40));
 206               buf_rewind0 = buf_adv0 = ip4_header_bytes (ip40);
 207             }
 208           /* NAT UDP port 4500 case, don't advance any more */
 209           if (ip41->protocol == IP_PROTOCOL_UDP)
 210             {
 211               esp1 =
 212                 (esp_header_t *) ((u8 *) ip41 + ip4_header_bytes (ip41) +
 213                                   sizeof (udp_header_t));
 214               buf_adv1 = 0;
 215               buf_rewind1 = ip4_header_bytes (ip41) + sizeof (udp_header_t);
 216             }
 217           else
 218             {
 219               esp1 = (esp_header_t *) ((u8 *) ip41 + ip4_header_bytes (ip41));
 220               buf_rewind1 = buf_adv1 = ip4_header_bytes (ip41);
 221             }
 222         }
 223
 224       vlib_buffer_advance (b[0], buf_adv0);
 225       vlib_buffer_advance (b[1], buf_adv1);
 226
 227       len0 = vlib_buffer_length_in_chain (vm, b[0]);
 228       len1 = vlib_buffer_length_in_chain (vm, b[1]);
 229
 230       /* If the packet is too short to contain an SPI, then maybe
 231        * it's a keep alive */
 232       if (len0 < sizeof (esp_header_t))
 233         {
 234           if (esp0->spi_bytes[0] == 0xff)
 235             b[0]->error = node->errors[IPSEC_IF_INPUT_ERROR_NAT_KEEPALIVE];
 236           else
 237             b[0]->error = node->errors[IPSEC_IF_INPUT_ERROR_TOO_SHORT];
 238
 239           next[0] = IPSEC_INPUT_NEXT_DROP;
 240           goto pkt1;
 241         }
 242
 243       if (is_ip6)
 244         {
 245           key60.remote_ip = ip60->src_address;
 246           key60.spi = esp0->spi;
 247
 248           if (memcmp (&key60, &last_key6, sizeof (last_key6)) == 0)
 249             {
 250               tid0 = last_tunnel_id;
 251             }
 252           else
 253             {
 254               uword *p =
 255                 hash_get_mem (im->ipsec6_if_pool_index_by_key, &key60);
 256               if (p)
 257                 {
 258                   tid0 = p[0];
 259                   last_tunnel_id = tid0;
 260                   clib_memcpy_fast (&last_key6, &key60, sizeof (key60));
 261                 }
 262               else
 263                 {
 264                   next[0] =
 265                     ipsec_ip6_if_no_tunnel (node, b[0], esp0, buf_adv0);
 266                   n_no_tunnel++;
 267                   goto pkt1;
 268                 }
 269             }
 270         }
 271       else                      /* !is_ip6 */
 272         {
 273           key40.remote_ip = ip40->src_address;
 274           key40.spi = esp0->spi;
 275
 276           if (key40.as_u64 == last_key4.as_u64)
 277             {
 278               tid0 = last_tunnel_id;
 279             }
 280           else
 281             {
 282               uword *p =
 283                 hash_get (im->ipsec4_if_pool_index_by_key, key40.as_u64);
 284               if (p)
 285                 {
 286                   tid0 = p[0];
 287                   last_tunnel_id = tid0;
 288                   last_key4.as_u64 = key40.as_u64;
 289                 }
 290               else
 291                 {
 292                   next[0] =
 293                     ipsec_ip4_if_no_tunnel (node, b[0], esp0, ip40,
 294                                             buf_rewind0);
 295                   n_no_tunnel++;
 296                   goto pkt1;
 297                 }
 298             }
 299         }
 300
 301       t0 = pool_elt_at_index (im->tunnel_interfaces, tid0);
 302       vnet_buffer (b[0])->ipsec.sad_index = t0->input_sa_index;
 303
 304       if (PREDICT_TRUE (t0->hw_if_index != ~0))
 305         {
 306           sw_if_index0 = t0->sw_if_index;
 307           vnet_buffer (b[0])->sw_if_index[VLIB_RX] = sw_if_index0;
 308
 309           if (PREDICT_FALSE (!(t0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP)))
 310             {
 311               vlib_increment_combined_counter
 312                 (drop_counter, thread_index, sw_if_index0, 1, len0);
 313               n_disabled++;
 314               b[0]->error = node->errors[IPSEC_IF_INPUT_ERROR_DISABLED];
 315               next[0] = IPSEC_INPUT_NEXT_DROP;
 316               goto pkt1;
 317             }
 318
 319           if (PREDICT_TRUE (sw_if_index0 == last_sw_if_index))
 320             {
 321               n_packets++;
 322               n_bytes += len0;
 323             }
 324           else
 325             {
 326               if (n_packets)
 327                 {
 328                   vlib_increment_combined_counter
 329                     (rx_counter, thread_index, last_sw_if_index,
 330                      n_packets, n_bytes);
 331                 }
 332
 333               last_sw_if_index = sw_if_index0;
 334               n_packets = 1;
 335               n_bytes = len0;
 336             }
 337         }
 338
 339     pkt1:
 340
 341       if (len1 < sizeof (esp_header_t))
 342         {
 343           if (esp0->spi_bytes[0] == 0xff)
 344             b[1]->error = node->errors[IPSEC_IF_INPUT_ERROR_NAT_KEEPALIVE];
 345           else
 346             b[1]->error = node->errors[IPSEC_IF_INPUT_ERROR_TOO_SHORT];
 347
 348           next[1] = IPSEC_INPUT_NEXT_DROP;
 349           goto trace1;
 350         }
 351
 352       if (is_ip6)
 353         {
 354           key61.remote_ip = ip61->src_address;
 355           key61.spi = esp1->spi;
 356
 357           if (memcmp (&key61, &last_key6, sizeof (last_key6)) == 0)
 358             {
 359               tid1 = last_tunnel_id;
 360             }
 361           else
 362             {
 363               uword *p =
 364                 hash_get_mem (im->ipsec6_if_pool_index_by_key, &key61);
 365               if (p)
 366                 {
 367                   tid1 = p[0];
 368                   last_tunnel_id = tid1;
 369                   clib_memcpy_fast (&last_key6, &key61, sizeof (key61));
 370                 }
 371               else
 372                 {
 373                   next[1] =
 374                     ipsec_ip6_if_no_tunnel (node, b[1], esp1, buf_adv1);
 375                   n_no_tunnel++;
 376                   goto trace1;
 377                 }
 378             }
 379         }
 380       else                      /* !is_ip6 */
 381         {
 382           key41.remote_ip = ip41->src_address;
 383           key41.spi = esp1->spi;
 384
 385           if (key41.as_u64 == last_key4.as_u64)
 386             {
 387               tid1 = last_tunnel_id;
 388             }
 389           else
 390             {
 391               uword *p =
 392                 hash_get (im->ipsec4_if_pool_index_by_key, key41.as_u64);
 393               if (p)
 394                 {
 395                   tid1 = p[0];
 396                   last_tunnel_id = tid1;
 397                   last_key4.as_u64 = key41.as_u64;
 398                 }
 399               else
 400                 {
 401                   next[1] =
 402                     ipsec_ip4_if_no_tunnel (node, b[1], esp1, ip41,
 403                                             buf_rewind1);
 404                   n_no_tunnel++;
 405                   goto trace1;
 406                 }
 407             }
 408         }
 409
 410       t1 = pool_elt_at_index (im->tunnel_interfaces, tid1);
 411       vnet_buffer (b[1])->ipsec.sad_index = t1->input_sa_index;
 412
 413       if (PREDICT_TRUE (t1->hw_if_index != ~0))
 414         {
 415           sw_if_index1 = t1->sw_if_index;
 416           vnet_buffer (b[1])->sw_if_index[VLIB_RX] = sw_if_index1;
 417
 418           if (PREDICT_FALSE (!(t1->flags & VNET_HW_INTERFACE_FLAG_LINK_UP)))
 419             {
 420               vlib_increment_combined_counter
 421                 (drop_counter, thread_index, sw_if_index1, 1, len1);
 422               n_disabled++;
 423               b[1]->error = node->errors[IPSEC_IF_INPUT_ERROR_DISABLED];
 424               next[1] = IPSEC_INPUT_NEXT_DROP;
 425               goto trace1;
 426             }
 427
 428           if (PREDICT_TRUE (sw_if_index1 == last_sw_if_index))
 429             {
 430               n_packets++;
 431               n_bytes += len1;
 432             }
 433           else
 434             {
 435               if (n_packets)
 436                 {
 437                   vlib_increment_combined_counter
 438                     (rx_counter, thread_index, last_sw_if_index,
 439                      n_packets, n_bytes);
 440                 }
 441
 442               last_sw_if_index = sw_if_index1;
 443               n_packets = 1;
 444               n_bytes = len1;
 445             }
 446         }
 447
 448     trace1:
 449       if (PREDICT_FALSE (is_trace))
 450         {
 451           if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
 452             {
 453               ipsec_if_input_trace_t *tr =
 454                 vlib_add_trace (vm, node, b[0], sizeof (*tr));
 455               if (is_ip6)
 456                 clib_memcpy (&tr->key6, &key60, sizeof (tr->key6));
 457               else
 458                 clib_memcpy (&tr->key4, &key40, sizeof (tr->key4));
 459               tr->is_ip6 = is_ip6;
 460               tr->seq =
 461                 len0 >=
 462                 sizeof (*esp0) ? clib_host_to_net_u32 (esp0->seq) : ~0;
 463             }
 464           if (b[1]->flags & VLIB_BUFFER_IS_TRACED)
 465             {
 466               ipsec_if_input_trace_t *tr =
 467                 vlib_add_trace (vm, node, b[1], sizeof (*tr));
 468               if (is_ip6)
 469                 clib_memcpy (&tr->key6, &key61, sizeof (tr->key6));
 470               else
 471                 clib_memcpy (&tr->key4, &key41, sizeof (tr->key4));
 472               tr->is_ip6 = is_ip6;
 473               tr->seq =
 474                 len1 >=
 475                 sizeof (*esp1) ? clib_host_to_net_u32 (esp1->seq) : ~0;
 476             }
 477         }
 478
 479       /* next */
 480       b += 2;
 481       next += 2;
 482       n_left_from -= 2;
 483     }
 484   while (n_left_from > 0)
 485     {
 486       u32 sw_if_index0;
 487       ip4_header_t *ip40;
 488       ip6_header_t *ip60;
 489       esp_header_t *esp0;
 490       u32 len0;
 491       u16 buf_adv0, buf_rewind0;
 492       u32 tid0;
 493       ipsec_tunnel_if_t *t0;
 494       ipsec4_tunnel_key_t key40;
 495       ipsec6_tunnel_key_t key60;
 496
 497       ip40 =
 498         (ip4_header_t *) (b[0]->data + vnet_buffer (b[0])->l3_hdr_offset);
 499
 500       if (is_ip6)
 501         {
 502           ip60 = (ip6_header_t *) ip40;
 503           esp0 = (esp_header_t *) ((u8 *) ip60 + sizeof (ip6_header_t));
 504           buf_adv0 = sizeof (ip6_header_t);
 505         }
 506       else
 507         {
 508           /* NAT UDP port 4500 case, don't advance any more */
 509           if (ip40->protocol == IP_PROTOCOL_UDP)
 510             {
 511               esp0 =
 512                 (esp_header_t *) ((u8 *) ip40 + ip4_header_bytes (ip40) +
 513                                   sizeof (udp_header_t));
 514               buf_adv0 = 0;
 515               buf_rewind0 = ip4_header_bytes (ip40) + sizeof (udp_header_t);
 516             }
 517           else
 518             {
 519               esp0 = (esp_header_t *) ((u8 *) ip40 + ip4_header_bytes (ip40));
 520               buf_rewind0 = buf_adv0 = ip4_header_bytes (ip40);
 521             }
 522         }
 523
 524       /* stats for the tunnel include all the data after the IP header
 525          just like a norml IP-IP tunnel */
 526       vlib_buffer_advance (b[0], buf_adv0);
 527       len0 = vlib_buffer_length_in_chain (vm, b[0]);
 528
 529       if (len0 < sizeof (esp_header_t))
 530         {
 531           if (esp0->spi_bytes[0] == 0xff)
 532             b[0]->error = node->errors[IPSEC_IF_INPUT_ERROR_NAT_KEEPALIVE];
 533           else
 534             b[0]->error = node->errors[IPSEC_IF_INPUT_ERROR_TOO_SHORT];
 535
 536           next[0] = IPSEC_INPUT_NEXT_DROP;
 537           goto trace00;
 538         }
 539
 540       if (is_ip6)
 541         {
 542           key60.remote_ip = ip60->src_address;
 543           key60.spi = esp0->spi;
 544
 545           if (memcmp (&key60, &last_key6, sizeof (last_key6)) == 0)
 546             {
 547               tid0 = last_tunnel_id;
 548             }
 549           else
 550             {
 551               uword *p =
 552                 hash_get_mem (im->ipsec6_if_pool_index_by_key, &key60);
 553               if (p)
 554                 {
 555                   tid0 = p[0];
 556                   last_tunnel_id = tid0;
 557                   clib_memcpy_fast (&last_key6, &key60, sizeof (key60));
 558                 }
 559               else
 560                 {
 561                   next[0] =
 562                     ipsec_ip6_if_no_tunnel (node, b[0], esp0, buf_adv0);
 563                   n_no_tunnel++;
 564                   goto trace00;
 565                 }
 566             }
 567         }
 568       else                      /* !is_ip6 */
 569         {
 570           key40.remote_ip = ip40->src_address;
 571           key40.spi = esp0->spi;
 572
 573           if (key40.as_u64 == last_key4.as_u64)
 574             {
 575               tid0 = last_tunnel_id;
 576             }
 577           else
 578             {
 579               uword *p =
 580                 hash_get (im->ipsec4_if_pool_index_by_key, key40.as_u64);
 581               if (p)
 582                 {
 583                   tid0 = p[0];
 584                   last_tunnel_id = tid0;
 585                   last_key4.as_u64 = key40.as_u64;
 586                 }
 587               else
 588                 {
 589                   next[0] =
 590                     ipsec_ip4_if_no_tunnel (node, b[0], esp0, ip40,
 591                                             buf_rewind0);
 592                   n_no_tunnel++;
 593                   goto trace00;
 594                 }
 595             }
 596         }
 597
 598       t0 = pool_elt_at_index (im->tunnel_interfaces, tid0);
 599       vnet_buffer (b[0])->ipsec.sad_index = t0->input_sa_index;
 600
 601       if (PREDICT_TRUE (t0->hw_if_index != ~0))
 602         {
 603           sw_if_index0 = t0->sw_if_index;
 604           vnet_buffer (b[0])->sw_if_index[VLIB_RX] = sw_if_index0;
 605
 606           if (PREDICT_FALSE (!(t0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP)))
 607             {
 608               vlib_increment_combined_counter
 609                 (drop_counter, thread_index, sw_if_index0, 1, len0);
 610               n_disabled++;
 611               b[0]->error = node->errors[IPSEC_IF_INPUT_ERROR_DISABLED];
 612               next[0] = IPSEC_INPUT_NEXT_DROP;
 613               goto trace00;
 614             }
 615
 616           if (PREDICT_TRUE (sw_if_index0 == last_sw_if_index))
 617             {
 618               n_packets++;
 619               n_bytes += len0;
 620             }
 621           else
 622             {
 623               if (n_packets)
 624                 {
 625                   vlib_increment_combined_counter
 626                     (rx_counter, thread_index, last_sw_if_index,
 627                      n_packets, n_bytes);
 628                 }
 629
 630               last_sw_if_index = sw_if_index0;
 631               n_packets = 1;
 632               n_bytes = len0;
 633             }
 634         }
 635
 636     trace00:
 637       if (PREDICT_FALSE (is_trace))
 638         {
 639           if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
 640             {
 641               ipsec_if_input_trace_t *tr =
 642                 vlib_add_trace (vm, node, b[0], sizeof (*tr));
 643               if (is_ip6)
 644                 clib_memcpy (&tr->key6, &key60, sizeof (tr->key6));
 645               else
 646                 clib_memcpy (&tr->key4, &key40, sizeof (tr->key4));
 647               tr->is_ip6 = is_ip6;
 648               tr->seq =
 649                 len0 >=
 650                 sizeof (*esp0) ? clib_host_to_net_u32 (esp0->seq) : ~0;
 651             }
 652         }
 653
 654       /* next */
 655       b += 1;
 656       next += 1;
 657       n_left_from -= 1;
 658     }
 659
 660   if (n_packets)
 661     {
 662       vlib_increment_combined_counter (rx_counter,
 663                                        thread_index,
 664                                        last_sw_if_index, n_packets, n_bytes);
 665     }
 666
 667   vlib_node_increment_counter (vm, node->node_index,
 668                                IPSEC_IF_INPUT_ERROR_RX,
 669                                from_frame->n_vectors - (n_disabled +
 670                                                         n_no_tunnel));
 671
 672   vlib_buffer_enqueue_to_next (vm, node, from, nexts, from_frame->n_vectors);
 673
 674   return from_frame->n_vectors;
 675 }
 676
 677 VLIB_NODE_FN (ipsec4_if_input_node) (vlib_main_t * vm,
 678                                      vlib_node_runtime_t * node,
 679                                      vlib_frame_t * from_frame)
 680 {
 681   return ipsec_if_input_inline (vm, node, from_frame, 0 /* is_ip6 */ );
 682 }
 683
 684 /* *INDENT-OFF* */
 685 VLIB_REGISTER_NODE (ipsec4_if_input_node) = {
 686   .name = "ipsec4-if-input",
 687   .vector_size = sizeof (u32),
 688   .format_trace = format_ipsec_if_input_trace,
 689   .type = VLIB_NODE_TYPE_INTERNAL,
 690   .n_errors = ARRAY_LEN(ipsec_if_input_error_strings),
 691   .error_strings = ipsec_if_input_error_strings,
 692   .sibling_of = "ipsec4-input-feature",
 693 };
 694 /* *INDENT-ON* */
 695
 696 VLIB_NODE_FN (ipsec6_if_input_node) (vlib_main_t * vm,
 697                                      vlib_node_runtime_t * node,
 698                                      vlib_frame_t * from_frame)
 699 {
 700   return ipsec_if_input_inline (vm, node, from_frame, 1 /* is_ip6 */ );
 701 }
 702
 703 /* *INDENT-OFF* */
 704 VLIB_REGISTER_NODE (ipsec6_if_input_node) = {
 705   .name = "ipsec6-if-input",
 706   .vector_size = sizeof (u32),
 707   .format_trace = format_ipsec_if_input_trace,
 708   .type = VLIB_NODE_TYPE_INTERNAL,
 709   .n_errors = ARRAY_LEN(ipsec_if_input_error_strings),
 710   .error_strings = ipsec_if_input_error_strings,
 711   .sibling_of = "ipsec6-input-feature",
 712 };
 713 /* *INDENT-ON* */
 714
 715 /*
 716  * fd.io coding-style-patch-verification: ON
 717  *
 718  * Local Variables:
 719  * eval: (c-set-style "gnu")
 720  * End:
 721  */