src/plugins/map/ip6_map.c

   1 /*
   2  * Copyright (c) 2015 Cisco and/or its affiliates.
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15 #include "map.h"
  16
  17 #include <vnet/ip/ip_frag.h>
  18 #include <vnet/ip/ip4_to_ip6.h>
  19 #include <vnet/ip/ip6_to_ip4.h>
  20 #include <vnet/ip/reass/ip4_sv_reass.h>
  21
  22 enum ip6_map_next_e
  23 {
  24   IP6_MAP_NEXT_IP4_LOOKUP,
  25 #ifdef MAP_SKIP_IP6_LOOKUP
  26   IP6_MAP_NEXT_IP4_REWRITE,
  27 #endif
  28   IP6_MAP_NEXT_IP6_REASS,
  29   IP6_MAP_NEXT_IP4_REASS,
  30   IP6_MAP_NEXT_IP4_FRAGMENT,
  31   IP6_MAP_NEXT_IP6_ICMP_RELAY,
  32   IP6_MAP_NEXT_IP6_LOCAL,
  33   IP6_MAP_NEXT_DROP,
  34   IP6_MAP_NEXT_ICMP,
  35   IP6_MAP_N_NEXT,
  36 };
  37
  38 enum ip6_map_ip6_reass_next_e
  39 {
  40   IP6_MAP_IP6_REASS_NEXT_IP6_MAP,
  41   IP6_MAP_IP6_REASS_NEXT_DROP,
  42   IP6_MAP_IP6_REASS_N_NEXT,
  43 };
  44
  45 enum ip6_map_post_ip4_reass_next_e
  46 {
  47   IP6_MAP_POST_IP4_REASS_NEXT_IP4_LOOKUP,
  48   IP6_MAP_POST_IP4_REASS_NEXT_IP4_FRAGMENT,
  49   IP6_MAP_POST_IP4_REASS_NEXT_DROP,
  50   IP6_MAP_POST_IP4_REASS_N_NEXT,
  51 };
  52
  53 enum ip6_icmp_relay_next_e
  54 {
  55   IP6_ICMP_RELAY_NEXT_IP4_LOOKUP,
  56   IP6_ICMP_RELAY_NEXT_DROP,
  57   IP6_ICMP_RELAY_N_NEXT,
  58 };
  59
  60 vlib_node_registration_t ip6_map_post_ip4_reass_node;
  61 vlib_node_registration_t ip6_map_ip6_reass_node;
  62 static vlib_node_registration_t ip6_map_icmp_relay_node;
  63
  64 typedef struct
  65 {
  66   u32 map_domain_index;
  67   u16 port;
  68   u8 cached;
  69 } map_ip6_map_ip4_reass_trace_t;
  70
  71 u8 *
  72 format_ip6_map_post_ip4_reass_trace (u8 * s, va_list * args)
  73 {
  74   CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
  75   CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
  76   map_ip6_map_ip4_reass_trace_t *t =
  77     va_arg (*args, map_ip6_map_ip4_reass_trace_t *);
  78   return format (s, "MAP domain index: %d L4 port: %u Status: %s",
  79                  t->map_domain_index, clib_net_to_host_u16 (t->port),
  80                  t->cached ? "cached" : "forwarded");
  81 }
  82
  83 typedef struct
  84 {
  85   u16 offset;
  86   u16 frag_len;
  87   u8 out;
  88 } map_ip6_map_ip6_reass_trace_t;
  89
  90 u8 *
  91 format_ip6_map_ip6_reass_trace (u8 * s, va_list * args)
  92 {
  93   CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
  94   CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
  95   map_ip6_map_ip6_reass_trace_t *t =
  96     va_arg (*args, map_ip6_map_ip6_reass_trace_t *);
  97   return format (s, "Offset: %d Fragment length: %d Status: %s", t->offset,
  98                  t->frag_len, t->out ? "out" : "in");
  99 }
 100
 101 /*
 102  * ip6_map_sec_check
 103  */
 104 static_always_inline bool
 105 ip6_map_sec_check (map_domain_t * d, u16 port, ip4_header_t * ip4,
 106                    ip6_header_t * ip6)
 107 {
 108   u16 sp4 = clib_net_to_host_u16 (port);
 109   u32 sa4 = clib_net_to_host_u32 (ip4->src_address.as_u32);
 110   u64 sal6 = map_get_pfx (d, sa4, sp4);
 111   u64 sar6 = map_get_sfx (d, sa4, sp4);
 112
 113   if (PREDICT_FALSE
 114       (sal6 != clib_net_to_host_u64 (ip6->src_address.as_u64[0])
 115        || sar6 != clib_net_to_host_u64 (ip6->src_address.as_u64[1])))
 116     return (false);
 117   return (true);
 118 }
 119
 120 static_always_inline void
 121 ip6_map_security_check (map_domain_t * d, vlib_buffer_t * b0,
 122                         ip4_header_t * ip4, ip6_header_t * ip6, u32 * next,
 123                         u8 * error)
 124 {
 125   map_main_t *mm = &map_main;
 126   if (d->ea_bits_len || d->rules)
 127     {
 128       if (d->psid_length > 0)
 129         {
 130           if (!ip4_is_fragment (ip4))
 131             {
 132               u16 port = ip4_get_port (ip4, 1);
 133               if (port)
 134                 {
 135                   if (mm->sec_check)
 136                     *error =
 137                       ip6_map_sec_check (d, port, ip4,
 138                                          ip6) ? MAP_ERROR_NONE :
 139                       MAP_ERROR_DECAP_SEC_CHECK;
 140                 }
 141               else
 142                 {
 143                   *error = MAP_ERROR_BAD_PROTOCOL;
 144                 }
 145             }
 146           else
 147             {
 148               if (mm->sec_check_frag)
 149                 {
 150                   vnet_buffer (b0)->ip.reass.next_index =
 151                     map_main.ip4_sv_reass_custom_next_index;
 152                   *next = IP6_MAP_NEXT_IP4_REASS;
 153                 }
 154             }
 155         }
 156     }
 157 }
 158
 159 static_always_inline bool
 160 ip6_map_ip4_lookup_bypass (vlib_buffer_t * p0, ip4_header_t * ip)
 161 {
 162 #ifdef MAP_SKIP_IP6_LOOKUP
 163   if (FIB_NODE_INDEX_INVALID != pre_resolved[FIB_PROTOCOL_IP4].fei)
 164     {
 165       vnet_buffer (p0)->ip.adj_index[VLIB_TX] =
 166         pre_resolved[FIB_PROTOCOL_IP4].dpo.dpoi_index;
 167       return (true);
 168     }
 169 #endif
 170   return (false);
 171 }
 172
 173 /*
 174  * ip6_map
 175  */
 176 static uword
 177 ip6_map (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
 178 {
 179   u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
 180   vlib_node_runtime_t *error_node =
 181     vlib_node_get_runtime (vm, ip6_map_node.index);
 182   map_main_t *mm = &map_main;
 183   vlib_combined_counter_main_t *cm = mm->domain_counters;
 184   u32 thread_index = vm->thread_index;
 185
 186   from = vlib_frame_vector_args (frame);
 187   n_left_from = frame->n_vectors;
 188   next_index = node->cached_next_index;
 189   while (n_left_from > 0)
 190     {
 191       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
 192
 193       /* Dual loop */
 194       while (n_left_from >= 4 && n_left_to_next >= 2)
 195         {
 196           u32 pi0, pi1;
 197           vlib_buffer_t *p0, *p1;
 198           u8 error0 = MAP_ERROR_NONE;
 199           u8 error1 = MAP_ERROR_NONE;
 200           map_domain_t *d0 = 0, *d1 = 0;
 201           ip4_header_t *ip40, *ip41;
 202           ip6_header_t *ip60, *ip61;
 203           u16 port0 = 0, port1 = 0;
 204           u32 map_domain_index0 = ~0, map_domain_index1 = ~0;
 205           u32 next0 = IP6_MAP_NEXT_IP4_LOOKUP;
 206           u32 next1 = IP6_MAP_NEXT_IP4_LOOKUP;
 207
 208           /* Prefetch next iteration. */
 209           {
 210             vlib_buffer_t *p2, *p3;
 211
 212             p2 = vlib_get_buffer (vm, from[2]);
 213             p3 = vlib_get_buffer (vm, from[3]);
 214
 215             vlib_prefetch_buffer_header (p2, LOAD);
 216             vlib_prefetch_buffer_header (p3, LOAD);
 217
 218             /* IPv6 + IPv4 header + 8 bytes of ULP */
 219             CLIB_PREFETCH (p2->data, 68, LOAD);
 220             CLIB_PREFETCH (p3->data, 68, LOAD);
 221           }
 222
 223           pi0 = to_next[0] = from[0];
 224           pi1 = to_next[1] = from[1];
 225           from += 2;
 226           n_left_from -= 2;
 227           to_next += 2;
 228           n_left_to_next -= 2;
 229
 230           p0 = vlib_get_buffer (vm, pi0);
 231           p1 = vlib_get_buffer (vm, pi1);
 232           ip60 = vlib_buffer_get_current (p0);
 233           ip61 = vlib_buffer_get_current (p1);
 234           vlib_buffer_advance (p0, sizeof (ip6_header_t));
 235           vlib_buffer_advance (p1, sizeof (ip6_header_t));
 236           ip40 = vlib_buffer_get_current (p0);
 237           ip41 = vlib_buffer_get_current (p1);
 238
 239           /*
 240            * Encapsulated IPv4 packet
 241            *   - IPv4 fragmented -> Pass to virtual reassembly unless security check disabled
 242            *   - Lookup/Rewrite or Fragment node in case of packet > MTU
 243            * Fragmented IPv6 packet
 244            * ICMP IPv6 packet
 245            *   - Error -> Pass to ICMPv6/ICMPv4 relay
 246            *   - Info -> Pass to IPv6 local
 247            * Anything else -> drop
 248            */
 249           if (PREDICT_TRUE
 250               (ip60->protocol == IP_PROTOCOL_IP_IN_IP
 251                && clib_net_to_host_u16 (ip60->payload_length) > 20))
 252             {
 253               d0 =
 254                 ip4_map_get_domain ((ip4_address_t *) & ip40->
 255                                     src_address.as_u32, &map_domain_index0,
 256                                     &error0);
 257             }
 258           else if (ip60->protocol == IP_PROTOCOL_ICMP6 &&
 259                    clib_net_to_host_u16 (ip60->payload_length) >
 260                    sizeof (icmp46_header_t))
 261             {
 262               icmp46_header_t *icmp = (void *) (ip60 + 1);
 263               next0 = (icmp->type == ICMP6_echo_request
 264                        || icmp->type ==
 265                        ICMP6_echo_reply) ? IP6_MAP_NEXT_IP6_LOCAL :
 266                 IP6_MAP_NEXT_IP6_ICMP_RELAY;
 267             }
 268           else if (ip60->protocol == IP_PROTOCOL_IPV6_FRAGMENTATION)
 269             {
 270               next0 = IP6_MAP_NEXT_IP6_REASS;
 271             }
 272           else
 273             {
 274               error0 = MAP_ERROR_BAD_PROTOCOL;
 275             }
 276           if (PREDICT_TRUE
 277               (ip61->protocol == IP_PROTOCOL_IP_IN_IP
 278                && clib_net_to_host_u16 (ip61->payload_length) > 20))
 279             {
 280               d1 =
 281                 ip4_map_get_domain ((ip4_address_t *) & ip41->
 282                                     src_address.as_u32, &map_domain_index1,
 283                                     &error1);
 284             }
 285           else if (ip61->protocol == IP_PROTOCOL_ICMP6 &&
 286                    clib_net_to_host_u16 (ip61->payload_length) >
 287                    sizeof (icmp46_header_t))
 288             {
 289               icmp46_header_t *icmp = (void *) (ip61 + 1);
 290               next1 = (icmp->type == ICMP6_echo_request
 291                        || icmp->type ==
 292                        ICMP6_echo_reply) ? IP6_MAP_NEXT_IP6_LOCAL :
 293                 IP6_MAP_NEXT_IP6_ICMP_RELAY;
 294             }
 295           else if (ip61->protocol == IP_PROTOCOL_IPV6_FRAGMENTATION)
 296             {
 297               next1 = IP6_MAP_NEXT_IP6_REASS;
 298             }
 299           else
 300             {
 301               error1 = MAP_ERROR_BAD_PROTOCOL;
 302             }
 303
 304           if (d0)
 305             {
 306               /* MAP inbound security check */
 307               ip6_map_security_check (d0, p0, ip40, ip60, &next0, &error0);
 308
 309               if (PREDICT_TRUE (error0 == MAP_ERROR_NONE &&
 310                                 next0 == IP6_MAP_NEXT_IP4_LOOKUP))
 311                 {
 312                   if (PREDICT_FALSE
 313                       (d0->mtu
 314                        && (clib_host_to_net_u16 (ip40->length) > d0->mtu)))
 315                     {
 316                       vnet_buffer (p0)->ip_frag.flags = 0;
 317                       vnet_buffer (p0)->ip_frag.next_index =
 318                         IP4_FRAG_NEXT_IP4_LOOKUP;
 319                       vnet_buffer (p0)->ip_frag.mtu = d0->mtu;
 320                       next0 = IP6_MAP_NEXT_IP4_FRAGMENT;
 321                     }
 322                   else
 323                     {
 324                       next0 =
 325                         ip6_map_ip4_lookup_bypass (p0,
 326                                                    ip40) ?
 327                         IP6_MAP_NEXT_IP4_REWRITE : next0;
 328                     }
 329                   vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_RX,
 330                                                    thread_index,
 331                                                    map_domain_index0, 1,
 332                                                    clib_net_to_host_u16
 333                                                    (ip40->length));
 334                 }
 335             }
 336           if (d1)
 337             {
 338               /* MAP inbound security check */
 339               ip6_map_security_check (d1, p1, ip41, ip61, &next1, &error1);
 340
 341               if (PREDICT_TRUE (error1 == MAP_ERROR_NONE &&
 342                                 next1 == IP6_MAP_NEXT_IP4_LOOKUP))
 343                 {
 344                   if (PREDICT_FALSE
 345                       (d1->mtu
 346                        && (clib_host_to_net_u16 (ip41->length) > d1->mtu)))
 347                     {
 348                       vnet_buffer (p1)->ip_frag.flags = 0;
 349                       vnet_buffer (p1)->ip_frag.next_index =
 350                         IP4_FRAG_NEXT_IP4_LOOKUP;
 351                       vnet_buffer (p1)->ip_frag.mtu = d1->mtu;
 352                       next1 = IP6_MAP_NEXT_IP4_FRAGMENT;
 353                     }
 354                   else
 355                     {
 356                       next1 =
 357                         ip6_map_ip4_lookup_bypass (p1,
 358                                                    ip41) ?
 359                         IP6_MAP_NEXT_IP4_REWRITE : next1;
 360                     }
 361                   vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_RX,
 362                                                    thread_index,
 363                                                    map_domain_index1, 1,
 364                                                    clib_net_to_host_u16
 365                                                    (ip41->length));
 366                 }
 367             }
 368
 369           if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
 370             {
 371               map_trace_t *tr = vlib_add_trace (vm, node, p0, sizeof (*tr));
 372               tr->map_domain_index = map_domain_index0;
 373               tr->port = port0;
 374             }
 375
 376           if (PREDICT_FALSE (p1->flags & VLIB_BUFFER_IS_TRACED))
 377             {
 378               map_trace_t *tr = vlib_add_trace (vm, node, p1, sizeof (*tr));
 379               tr->map_domain_index = map_domain_index1;
 380               tr->port = port1;
 381             }
 382
 383           if (error0 == MAP_ERROR_DECAP_SEC_CHECK && mm->icmp6_enabled)
 384             {
 385               /* Set ICMP parameters */
 386               vlib_buffer_advance (p0, -sizeof (ip6_header_t));
 387               icmp6_error_set_vnet_buffer (p0, ICMP6_destination_unreachable,
 388                                            ICMP6_destination_unreachable_source_address_failed_policy,
 389                                            0);
 390               next0 = IP6_MAP_NEXT_ICMP;
 391             }
 392           else
 393             {
 394               next0 = (error0 == MAP_ERROR_NONE) ? next0 : IP6_MAP_NEXT_DROP;
 395             }
 396
 397           if (error1 == MAP_ERROR_DECAP_SEC_CHECK && mm->icmp6_enabled)
 398             {
 399               /* Set ICMP parameters */
 400               vlib_buffer_advance (p1, -sizeof (ip6_header_t));
 401               icmp6_error_set_vnet_buffer (p1, ICMP6_destination_unreachable,
 402                                            ICMP6_destination_unreachable_source_address_failed_policy,
 403                                            0);
 404               next1 = IP6_MAP_NEXT_ICMP;
 405             }
 406           else
 407             {
 408               next1 = (error1 == MAP_ERROR_NONE) ? next1 : IP6_MAP_NEXT_DROP;
 409             }
 410
 411           /* Reset packet */
 412           if (next0 == IP6_MAP_NEXT_IP6_LOCAL)
 413             vlib_buffer_advance (p0, -sizeof (ip6_header_t));
 414           if (next1 == IP6_MAP_NEXT_IP6_LOCAL)
 415             vlib_buffer_advance (p1, -sizeof (ip6_header_t));
 416
 417           p0->error = error_node->errors[error0];
 418           p1->error = error_node->errors[error1];
 419           vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
 420                                            n_left_to_next, pi0, pi1, next0,
 421                                            next1);
 422         }
 423
 424       /* Single loop */
 425       while (n_left_from > 0 && n_left_to_next > 0)
 426         {
 427           u32 pi0;
 428           vlib_buffer_t *p0;
 429           u8 error0 = MAP_ERROR_NONE;
 430           map_domain_t *d0 = 0;
 431           ip4_header_t *ip40;
 432           ip6_header_t *ip60;
 433           i32 port0 = 0;
 434           u32 map_domain_index0 = ~0;
 435           u32 next0 = IP6_MAP_NEXT_IP4_LOOKUP;
 436
 437           pi0 = to_next[0] = from[0];
 438           from += 1;
 439           n_left_from -= 1;
 440           to_next += 1;
 441           n_left_to_next -= 1;
 442
 443           p0 = vlib_get_buffer (vm, pi0);
 444           ip60 = vlib_buffer_get_current (p0);
 445           vlib_buffer_advance (p0, sizeof (ip6_header_t));
 446           ip40 = vlib_buffer_get_current (p0);
 447
 448           /*
 449            * Encapsulated IPv4 packet
 450            *   - IPv4 fragmented -> Pass to virtual reassembly unless security check disabled
 451            *   - Lookup/Rewrite or Fragment node in case of packet > MTU
 452            * Fragmented IPv6 packet
 453            * ICMP IPv6 packet
 454            *   - Error -> Pass to ICMPv6/ICMPv4 relay
 455            *   - Info -> Pass to IPv6 local
 456            * Anything else -> drop
 457            */
 458           if (PREDICT_TRUE
 459               (ip60->protocol == IP_PROTOCOL_IP_IN_IP
 460                && clib_net_to_host_u16 (ip60->payload_length) > 20))
 461             {
 462               d0 =
 463                 ip4_map_get_domain ((ip4_address_t *) & ip40->
 464                                     src_address.as_u32, &map_domain_index0,
 465                                     &error0);
 466             }
 467           else if (ip60->protocol == IP_PROTOCOL_ICMP6 &&
 468                    clib_net_to_host_u16 (ip60->payload_length) >
 469                    sizeof (icmp46_header_t))
 470             {
 471               icmp46_header_t *icmp = (void *) (ip60 + 1);
 472               next0 = (icmp->type == ICMP6_echo_request
 473                        || icmp->type ==
 474                        ICMP6_echo_reply) ? IP6_MAP_NEXT_IP6_LOCAL :
 475                 IP6_MAP_NEXT_IP6_ICMP_RELAY;
 476             }
 477           else if (ip60->protocol == IP_PROTOCOL_IPV6_FRAGMENTATION &&
 478                    (((ip6_frag_hdr_t *) (ip60 + 1))->next_hdr ==
 479                     IP_PROTOCOL_IP_IN_IP))
 480             {
 481               next0 = IP6_MAP_NEXT_IP6_REASS;
 482             }
 483           else
 484             {
 485               /* XXX: Move get_domain to ip6_get_domain lookup on source */
 486               //error0 = MAP_ERROR_BAD_PROTOCOL;
 487               vlib_buffer_advance (p0, -sizeof (ip6_header_t));
 488               vnet_feature_next (&next0, p0);
 489             }
 490
 491           if (d0)
 492             {
 493               /* MAP inbound security check */
 494               ip6_map_security_check (d0, p0, ip40, ip60, &next0, &error0);
 495
 496               if (PREDICT_TRUE (error0 == MAP_ERROR_NONE &&
 497                                 next0 == IP6_MAP_NEXT_IP4_LOOKUP))
 498                 {
 499                   if (PREDICT_FALSE
 500                       (d0->mtu
 501                        && (clib_host_to_net_u16 (ip40->length) > d0->mtu)))
 502                     {
 503                       vnet_buffer (p0)->ip_frag.flags = 0;
 504                       vnet_buffer (p0)->ip_frag.next_index =
 505                         IP4_FRAG_NEXT_IP4_LOOKUP;
 506                       vnet_buffer (p0)->ip_frag.mtu = d0->mtu;
 507                       next0 = IP6_MAP_NEXT_IP4_FRAGMENT;
 508                     }
 509                   else
 510                     {
 511                       next0 =
 512                         ip6_map_ip4_lookup_bypass (p0,
 513                                                    ip40) ?
 514                         IP6_MAP_NEXT_IP4_REWRITE : next0;
 515                     }
 516                   vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_RX,
 517                                                    thread_index,
 518                                                    map_domain_index0, 1,
 519                                                    clib_net_to_host_u16
 520                                                    (ip40->length));
 521                 }
 522             }
 523
 524           if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
 525             {
 526               map_trace_t *tr = vlib_add_trace (vm, node, p0, sizeof (*tr));
 527               tr->map_domain_index = map_domain_index0;
 528               tr->port = (u16) port0;
 529             }
 530
 531           if (mm->icmp6_enabled &&
 532               (error0 == MAP_ERROR_DECAP_SEC_CHECK
 533                || error0 == MAP_ERROR_NO_DOMAIN))
 534             {
 535               /* Set ICMP parameters */
 536               vlib_buffer_advance (p0, -sizeof (ip6_header_t));
 537               icmp6_error_set_vnet_buffer (p0, ICMP6_destination_unreachable,
 538                                            ICMP6_destination_unreachable_source_address_failed_policy,
 539                                            0);
 540               next0 = IP6_MAP_NEXT_ICMP;
 541             }
 542           else
 543             {
 544               next0 = (error0 == MAP_ERROR_NONE) ? next0 : IP6_MAP_NEXT_DROP;
 545             }
 546
 547           /* Reset packet */
 548           if (next0 == IP6_MAP_NEXT_IP6_LOCAL)
 549             vlib_buffer_advance (p0, -sizeof (ip6_header_t));
 550
 551           p0->error = error_node->errors[error0];
 552           vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
 553                                            n_left_to_next, pi0, next0);
 554         }
 555       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 556     }
 557
 558   return frame->n_vectors;
 559 }
 560
 561
 562 static_always_inline void
 563 ip6_map_ip6_reass_prepare (vlib_main_t * vm, vlib_node_runtime_t * node,
 564                            map_ip6_reass_t * r, u32 ** fragments_ready,
 565                            u32 ** fragments_to_drop)
 566 {
 567   ip4_header_t *ip40;
 568   ip6_header_t *ip60;
 569   ip6_frag_hdr_t *frag0;
 570   vlib_buffer_t *p0;
 571
 572   if (!r->ip4_header.ip_version_and_header_length)
 573     return;
 574
 575   //The IP header is here, we need to check for packets
 576   //that can be forwarded
 577   int i;
 578   for (i = 0; i < MAP_IP6_REASS_MAX_FRAGMENTS_PER_REASSEMBLY; i++)
 579     {
 580       if (r->fragments[i].pi == ~0 ||
 581           ((!r->fragments[i].next_data_len)
 582            && (r->fragments[i].next_data_offset != (0xffff))))
 583         continue;
 584
 585       p0 = vlib_get_buffer (vm, r->fragments[i].pi);
 586       ip60 = vlib_buffer_get_current (p0);
 587       frag0 = (ip6_frag_hdr_t *) (ip60 + 1);
 588       ip40 = (ip4_header_t *) (frag0 + 1);
 589
 590       if (ip6_frag_hdr_offset (frag0))
 591         {
 592           //Not first fragment, add the IPv4 header
 593           clib_memcpy_fast (ip40, &r->ip4_header, 20);
 594         }
 595
 596 #ifdef MAP_IP6_REASS_COUNT_BYTES
 597       r->forwarded +=
 598         clib_net_to_host_u16 (ip60->payload_length) - sizeof (*frag0);
 599 #endif
 600
 601       if (ip6_frag_hdr_more (frag0))
 602         {
 603           //Not last fragment, we copy end of next
 604           clib_memcpy_fast (u8_ptr_add (ip60, p0->current_length),
 605                             r->fragments[i].next_data, 20);
 606           p0->current_length += 20;
 607           ip60->payload_length = u16_net_add (ip60->payload_length, 20);
 608         }
 609
 610       if (!ip4_is_fragment (ip40))
 611         {
 612           ip40->fragment_id = frag_id_6to4 (frag0->identification);
 613           ip40->flags_and_fragment_offset =
 614             clib_host_to_net_u16 (ip6_frag_hdr_offset (frag0));
 615         }
 616       else
 617         {
 618           ip40->flags_and_fragment_offset =
 619             clib_host_to_net_u16 (ip4_get_fragment_offset (ip40) +
 620                                   ip6_frag_hdr_offset (frag0));
 621         }
 622
 623       if (ip6_frag_hdr_more (frag0))
 624         ip40->flags_and_fragment_offset |=
 625           clib_host_to_net_u16 (IP4_HEADER_FLAG_MORE_FRAGMENTS);
 626
 627       ip40->length =
 628         clib_host_to_net_u16 (p0->current_length - sizeof (*ip60) -
 629                               sizeof (*frag0));
 630       ip40->checksum = ip4_header_checksum (ip40);
 631
 632       if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
 633         {
 634           map_ip6_map_ip6_reass_trace_t *tr =
 635             vlib_add_trace (vm, node, p0, sizeof (*tr));
 636           tr->offset = ip4_get_fragment_offset (ip40);
 637           tr->frag_len = clib_net_to_host_u16 (ip40->length) - sizeof (*ip40);
 638           tr->out = 1;
 639         }
 640
 641       vec_add1 (*fragments_ready, r->fragments[i].pi);
 642       r->fragments[i].pi = ~0;
 643       r->fragments[i].next_data_len = 0;
 644       r->fragments[i].next_data_offset = 0;
 645       map_main.ip6_reass_buffered_counter--;
 646
 647       //TODO: Best solution would be that ip6_map handles extension headers
 648       // and ignores atomic fragment. But in the meantime, let's just copy the header.
 649
 650       u8 protocol = frag0->next_hdr;
 651       memmove (u8_ptr_add (ip40, -sizeof (*ip60)), ip60, sizeof (*ip60));
 652       ((ip6_header_t *) u8_ptr_add (ip40, -sizeof (*ip60)))->protocol =
 653         protocol;
 654       vlib_buffer_advance (p0, sizeof (*frag0));
 655     }
 656 }
 657
 658 void
 659 map_ip6_drop_pi (u32 pi)
 660 {
 661   vlib_main_t *vm = vlib_get_main ();
 662   vlib_node_runtime_t *n =
 663     vlib_node_get_runtime (vm, ip6_map_ip6_reass_node.index);
 664   vlib_set_next_frame_buffer (vm, n, IP6_MAP_IP6_REASS_NEXT_DROP, pi);
 665 }
 666
 667 /*
 668  * ip6_reass
 669  * TODO: We should count the number of successfully
 670  * transmitted fragment bytes and compare that to the last fragment
 671  * offset such that we can free the reassembly structure when all fragments
 672  * have been forwarded.
 673  */
 674 static uword
 675 ip6_map_ip6_reass (vlib_main_t * vm,
 676                    vlib_node_runtime_t * node, vlib_frame_t * frame)
 677 {
 678   u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
 679   vlib_node_runtime_t *error_node =
 680     vlib_node_get_runtime (vm, ip6_map_ip6_reass_node.index);
 681   u32 *fragments_to_drop = NULL;
 682   u32 *fragments_ready = NULL;
 683
 684   from = vlib_frame_vector_args (frame);
 685   n_left_from = frame->n_vectors;
 686   next_index = node->cached_next_index;
 687   while (n_left_from > 0)
 688     {
 689       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
 690
 691       /* Single loop */
 692       while (n_left_from > 0 && n_left_to_next > 0)
 693         {
 694           u32 pi0;
 695           vlib_buffer_t *p0;
 696           u8 error0 = MAP_ERROR_NONE;
 697           ip6_header_t *ip60;
 698           ip6_frag_hdr_t *frag0;
 699           u16 offset;
 700           u16 next_offset;
 701           u16 frag_len;
 702
 703           pi0 = to_next[0] = from[0];
 704           from += 1;
 705           n_left_from -= 1;
 706           to_next += 1;
 707           n_left_to_next -= 1;
 708
 709           p0 = vlib_get_buffer (vm, pi0);
 710           ip60 = vlib_buffer_get_current (p0);
 711           frag0 = (ip6_frag_hdr_t *) (ip60 + 1);
 712           offset =
 713             clib_host_to_net_u16 (frag0->fragment_offset_and_more) & (~7);
 714           frag_len =
 715             clib_net_to_host_u16 (ip60->payload_length) - sizeof (*frag0);
 716           next_offset =
 717             ip6_frag_hdr_more (frag0) ? (offset + frag_len) : (0xffff);
 718
 719           //FIXME: Support other extension headers, maybe
 720
 721           if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
 722             {
 723               map_ip6_map_ip6_reass_trace_t *tr =
 724                 vlib_add_trace (vm, node, p0, sizeof (*tr));
 725               tr->offset = offset;
 726               tr->frag_len = frag_len;
 727               tr->out = 0;
 728             }
 729
 730           map_ip6_reass_lock ();
 731           map_ip6_reass_t *r =
 732             map_ip6_reass_get (&ip60->src_address, &ip60->dst_address,
 733                                frag0->identification, frag0->next_hdr,
 734                                &fragments_to_drop);
 735           //FIXME: Use better error codes
 736           if (PREDICT_FALSE (!r))
 737             {
 738               // Could not create a caching entry
 739               error0 = MAP_ERROR_FRAGMENT_MEMORY;
 740             }
 741           else if (PREDICT_FALSE ((frag_len <= 20 &&
 742                                    (ip6_frag_hdr_more (frag0) || (!offset)))))
 743             {
 744               //Very small fragment are restricted to the last one and
 745               //can't be the first one
 746               error0 = MAP_ERROR_FRAGMENT_MALFORMED;
 747             }
 748           else
 749             if (map_ip6_reass_add_fragment
 750                 (r, pi0, offset, next_offset, (u8 *) (frag0 + 1), frag_len))
 751             {
 752               map_ip6_reass_free (r, &fragments_to_drop);
 753               error0 = MAP_ERROR_FRAGMENT_MEMORY;
 754             }
 755           else
 756             {
 757 #ifdef MAP_IP6_REASS_COUNT_BYTES
 758               if (!ip6_frag_hdr_more (frag0))
 759                 r->expected_total = offset + frag_len;
 760 #endif
 761               ip6_map_ip6_reass_prepare (vm, node, r, &fragments_ready,
 762                                          &fragments_to_drop);
 763 #ifdef MAP_IP6_REASS_COUNT_BYTES
 764               if (r->forwarded >= r->expected_total)
 765                 map_ip6_reass_free (r, &fragments_to_drop);
 766 #endif
 767             }
 768           map_ip6_reass_unlock ();
 769
 770           if (error0 == MAP_ERROR_NONE)
 771             {
 772               if (frag_len > 20)
 773                 {
 774                   //Dequeue the packet
 775                   n_left_to_next++;
 776                   to_next--;
 777                 }
 778               else
 779                 {
 780                   //All data from that packet was copied no need to keep it, but this is not an error
 781                   p0->error = error_node->errors[MAP_ERROR_NONE];
 782                   vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
 783                                                    to_next, n_left_to_next,
 784                                                    pi0,
 785                                                    IP6_MAP_IP6_REASS_NEXT_DROP);
 786                 }
 787             }
 788           else
 789             {
 790               p0->error = error_node->errors[error0];
 791               vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
 792                                                n_left_to_next, pi0,
 793                                                IP6_MAP_IP6_REASS_NEXT_DROP);
 794             }
 795         }
 796       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 797     }
 798
 799   map_send_all_to_node (vm, fragments_ready, node,
 800                         &error_node->errors[MAP_ERROR_NONE],
 801                         IP6_MAP_IP6_REASS_NEXT_IP6_MAP);
 802   map_send_all_to_node (vm, fragments_to_drop, node,
 803                         &error_node->errors[MAP_ERROR_FRAGMENT_DROPPED],
 804                         IP6_MAP_IP6_REASS_NEXT_DROP);
 805
 806   vec_free (fragments_to_drop);
 807   vec_free (fragments_ready);
 808   return frame->n_vectors;
 809 }
 810
 811 /*
 812  * ip6_map_post_ip4_reass
 813  */
 814 static uword
 815 ip6_map_post_ip4_reass (vlib_main_t * vm,
 816                         vlib_node_runtime_t * node, vlib_frame_t * frame)
 817 {
 818   u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
 819   vlib_node_runtime_t *error_node =
 820     vlib_node_get_runtime (vm, ip6_map_post_ip4_reass_node.index);
 821   map_main_t *mm = &map_main;
 822   vlib_combined_counter_main_t *cm = mm->domain_counters;
 823   u32 thread_index = vm->thread_index;
 824
 825   from = vlib_frame_vector_args (frame);
 826   n_left_from = frame->n_vectors;
 827   next_index = node->cached_next_index;
 828   while (n_left_from > 0)
 829     {
 830       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
 831
 832       /* Single loop */
 833       while (n_left_from > 0 && n_left_to_next > 0)
 834         {
 835           u32 pi0;
 836           vlib_buffer_t *p0;
 837           u8 error0 = MAP_ERROR_NONE;
 838           map_domain_t *d0;
 839           ip4_header_t *ip40;
 840           ip6_header_t *ip60;
 841           i32 port0 = 0;
 842           u32 map_domain_index0 = ~0;
 843           u32 next0 = IP6_MAP_POST_IP4_REASS_NEXT_IP4_LOOKUP;
 844
 845           pi0 = to_next[0] = from[0];
 846           from += 1;
 847           n_left_from -= 1;
 848           to_next += 1;
 849           n_left_to_next -= 1;
 850
 851           p0 = vlib_get_buffer (vm, pi0);
 852           ip40 = vlib_buffer_get_current (p0);
 853           ip60 = ((ip6_header_t *) ip40) - 1;
 854
 855           d0 =
 856             ip4_map_get_domain ((ip4_address_t *) & ip40->src_address.as_u32,
 857                                 &map_domain_index0, &error0);
 858
 859           port0 = vnet_buffer (p0)->ip.reass.l4_src_port;
 860
 861           if (PREDICT_TRUE (error0 == MAP_ERROR_NONE))
 862             error0 =
 863               ip6_map_sec_check (d0, port0, ip40,
 864                                  ip60) ? MAP_ERROR_NONE :
 865               MAP_ERROR_DECAP_SEC_CHECK;
 866
 867           if (PREDICT_FALSE
 868               (d0->mtu && (clib_host_to_net_u16 (ip40->length) > d0->mtu)
 869                && error0 == MAP_ERROR_NONE))
 870             {
 871               vnet_buffer (p0)->ip_frag.flags = 0;
 872               vnet_buffer (p0)->ip_frag.next_index = IP4_FRAG_NEXT_IP4_LOOKUP;
 873               vnet_buffer (p0)->ip_frag.mtu = d0->mtu;
 874               next0 = IP6_MAP_POST_IP4_REASS_NEXT_IP4_FRAGMENT;
 875             }
 876
 877           if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
 878             {
 879               map_ip6_map_ip4_reass_trace_t *tr =
 880                 vlib_add_trace (vm, node, p0, sizeof (*tr));
 881               tr->map_domain_index = map_domain_index0;
 882               tr->port = port0;
 883             }
 884
 885           if (error0 == MAP_ERROR_NONE)
 886             vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_RX,
 887                                              thread_index,
 888                                              map_domain_index0, 1,
 889                                              clib_net_to_host_u16
 890                                              (ip40->length));
 891           next0 =
 892             (error0 ==
 893              MAP_ERROR_NONE) ? next0 : IP6_MAP_POST_IP4_REASS_NEXT_DROP;
 894           p0->error = error_node->errors[error0];
 895           vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
 896                                            n_left_to_next, pi0, next0);
 897
 898         }
 899       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 900     }
 901   return frame->n_vectors;
 902 }
 903
 904 /*
 905  * ip6_icmp_relay
 906  */
 907 static uword
 908 ip6_map_icmp_relay (vlib_main_t * vm,
 909                     vlib_node_runtime_t * node, vlib_frame_t * frame)
 910 {
 911   u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
 912   vlib_node_runtime_t *error_node =
 913     vlib_node_get_runtime (vm, ip6_map_icmp_relay_node.index);
 914   map_main_t *mm = &map_main;
 915   u32 thread_index = vm->thread_index;
 916   u16 *fragment_ids, *fid;
 917
 918   from = vlib_frame_vector_args (frame);
 919   n_left_from = frame->n_vectors;
 920   next_index = node->cached_next_index;
 921
 922   /* Get random fragment IDs for replies. */
 923   fid = fragment_ids =
 924     clib_random_buffer_get_data (&vm->random_buffer,
 925                                  n_left_from * sizeof (fragment_ids[0]));
 926
 927   while (n_left_from > 0)
 928     {
 929       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
 930
 931       /* Single loop */
 932       while (n_left_from > 0 && n_left_to_next > 0)
 933         {
 934           u32 pi0;
 935           vlib_buffer_t *p0;
 936           u8 error0 = MAP_ERROR_NONE;
 937           ip6_header_t *ip60;
 938           u32 next0 = IP6_ICMP_RELAY_NEXT_IP4_LOOKUP;
 939           u32 mtu;
 940
 941           pi0 = to_next[0] = from[0];
 942           from += 1;
 943           n_left_from -= 1;
 944           to_next += 1;
 945           n_left_to_next -= 1;
 946
 947           p0 = vlib_get_buffer (vm, pi0);
 948           ip60 = vlib_buffer_get_current (p0);
 949           u16 tlen = clib_net_to_host_u16 (ip60->payload_length);
 950
 951           /*
 952            * In:
 953            *  IPv6 header           (40)
 954            *  ICMPv6 header          (8)
 955            *  IPv6 header           (40)
 956            *  Original IPv4 header / packet
 957            * Out:
 958            *  New IPv4 header
 959            *  New ICMP header
 960            *  Original IPv4 header / packet
 961            */
 962
 963           /* Need at least ICMP(8) + IPv6(40) + IPv4(20) + L4 header(8) */
 964           if (tlen < 76)
 965             {
 966               error0 = MAP_ERROR_ICMP_RELAY;
 967               goto error;
 968             }
 969
 970           icmp46_header_t *icmp60 = (icmp46_header_t *) (ip60 + 1);
 971           ip6_header_t *inner_ip60 = (ip6_header_t *) (icmp60 + 2);
 972
 973           if (inner_ip60->protocol != IP_PROTOCOL_IP_IN_IP)
 974             {
 975               error0 = MAP_ERROR_ICMP_RELAY;
 976               goto error;
 977             }
 978
 979           ip4_header_t *inner_ip40 = (ip4_header_t *) (inner_ip60 + 1);
 980           vlib_buffer_advance (p0, 60); /* sizeof ( IPv6 + ICMP + IPv6 - IPv4 - ICMP ) */
 981           ip4_header_t *new_ip40 = vlib_buffer_get_current (p0);
 982           icmp46_header_t *new_icmp40 = (icmp46_header_t *) (new_ip40 + 1);
 983
 984           /*
 985            * Relay according to RFC2473, section 8.3
 986            */
 987           switch (icmp60->type)
 988             {
 989             case ICMP6_destination_unreachable:
 990             case ICMP6_time_exceeded:
 991             case ICMP6_parameter_problem:
 992               /* Type 3 - destination unreachable, Code 1 - host unreachable */
 993               new_icmp40->type = ICMP4_destination_unreachable;
 994               new_icmp40->code =
 995                 ICMP4_destination_unreachable_destination_unreachable_host;
 996               break;
 997
 998             case ICMP6_packet_too_big:
 999               /* Type 3 - destination unreachable, Code 4 - packet too big */
1000               /* Potential TODO: Adjust domain tunnel MTU based on the value received here */
1001               mtu = clib_net_to_host_u32 (*((u32 *) (icmp60 + 1)));
1002
1003               /* Check DF flag */
1004               if (!
1005                   (inner_ip40->flags_and_fragment_offset &
1006                    clib_host_to_net_u16 (IP4_HEADER_FLAG_DONT_FRAGMENT)))
1007                 {
1008                   error0 = MAP_ERROR_ICMP_RELAY;
1009                   goto error;
1010                 }
1011
1012               new_icmp40->type = ICMP4_destination_unreachable;
1013               new_icmp40->code =
1014                 ICMP4_destination_unreachable_fragmentation_needed_and_dont_fragment_set;
1015               *((u32 *) (new_icmp40 + 1)) =
1016                 clib_host_to_net_u32 (mtu < 1280 ? 1280 : mtu);
1017               break;
1018
1019             default:
1020               error0 = MAP_ERROR_ICMP_RELAY;
1021               break;
1022             }
1023
1024           /*
1025            * Ensure the total ICMP packet is no longer than 576 bytes (RFC1812)
1026            */
1027           new_ip40->ip_version_and_header_length = 0x45;
1028           new_ip40->tos = 0;
1029           u16 nlen = (tlen - 20) > 576 ? 576 : tlen - 20;
1030           new_ip40->length = clib_host_to_net_u16 (nlen);
1031           new_ip40->fragment_id = fid[0];
1032           fid++;
1033           new_ip40->ttl = 64;
1034           new_ip40->protocol = IP_PROTOCOL_ICMP;
1035           new_ip40->src_address = mm->icmp4_src_address;
1036           new_ip40->dst_address = inner_ip40->src_address;
1037           new_ip40->checksum = ip4_header_checksum (new_ip40);
1038
1039           new_icmp40->checksum = 0;
1040           ip_csum_t sum = ip_incremental_checksum (0, new_icmp40, nlen - 20);
1041           new_icmp40->checksum = ~ip_csum_fold (sum);
1042
1043           vlib_increment_simple_counter (&mm->icmp_relayed, thread_index, 0,
1044                                          1);
1045
1046         error:
1047           if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
1048             {
1049               map_trace_t *tr = vlib_add_trace (vm, node, p0, sizeof (*tr));
1050               tr->map_domain_index = 0;
1051               tr->port = 0;
1052             }
1053
1054           next0 =
1055             (error0 == MAP_ERROR_NONE) ? next0 : IP6_ICMP_RELAY_NEXT_DROP;
1056           p0->error = error_node->errors[error0];
1057           vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1058                                            n_left_to_next, pi0, next0);
1059         }
1060       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1061     }
1062
1063   return frame->n_vectors;
1064
1065 }
1066
1067 static char *map_error_strings[] = {
1068 #define _(sym,string) string,
1069   foreach_map_error
1070 #undef _
1071 };
1072
1073 /* *INDENT-OFF* */
1074 VNET_FEATURE_INIT (ip6_map_feature, static) =
1075 {
1076   .arc_name = "ip6-unicast",
1077   .node_name = "ip6-map",
1078   .runs_before = VNET_FEATURES ("ip6-flow-classify"),
1079 };
1080
1081 VLIB_REGISTER_NODE(ip6_map_node) = {
1082   .function = ip6_map,
1083   .name = "ip6-map",
1084   .vector_size = sizeof(u32),
1085   .format_trace = format_map_trace,
1086   .type = VLIB_NODE_TYPE_INTERNAL,
1087
1088   .n_errors = MAP_N_ERROR,
1089   .error_strings = map_error_strings,
1090
1091   .n_next_nodes = IP6_MAP_N_NEXT,
1092   .next_nodes = {
1093     [IP6_MAP_NEXT_IP4_LOOKUP] = "ip4-lookup",
1094 #ifdef MAP_SKIP_IP6_LOOKUP
1095     [IP6_MAP_NEXT_IP4_REWRITE] = "ip4-load-balance",
1096 #endif
1097     [IP6_MAP_NEXT_IP6_REASS] = "ip6-map-ip6-reass",
1098     [IP6_MAP_NEXT_IP4_REASS] = "ip4-sv-reassembly-custom-next",
1099     [IP6_MAP_NEXT_IP4_FRAGMENT] = "ip4-frag",
1100     [IP6_MAP_NEXT_IP6_ICMP_RELAY] = "ip6-map-icmp-relay",
1101     [IP6_MAP_NEXT_IP6_LOCAL] = "ip6-local",
1102     [IP6_MAP_NEXT_DROP] = "error-drop",
1103     [IP6_MAP_NEXT_ICMP] = "ip6-icmp-error",
1104   },
1105 };
1106 /* *INDENT-ON* */
1107
1108 /* *INDENT-OFF* */
1109 VLIB_REGISTER_NODE(ip6_map_ip6_reass_node) = {
1110   .function = ip6_map_ip6_reass,
1111   .name = "ip6-map-ip6-reass",
1112   .vector_size = sizeof(u32),
1113   .format_trace = format_ip6_map_ip6_reass_trace,
1114   .type = VLIB_NODE_TYPE_INTERNAL,
1115   .n_errors = MAP_N_ERROR,
1116   .error_strings = map_error_strings,
1117   .n_next_nodes = IP6_MAP_IP6_REASS_N_NEXT,
1118   .next_nodes = {
1119     [IP6_MAP_IP6_REASS_NEXT_IP6_MAP] = "ip6-map",
1120     [IP6_MAP_IP6_REASS_NEXT_DROP] = "error-drop",
1121   },
1122 };
1123 /* *INDENT-ON* */
1124
1125 /* *INDENT-OFF* */
1126 VLIB_REGISTER_NODE(ip6_map_post_ip4_reass_node) = {
1127   .function = ip6_map_post_ip4_reass,
1128   .name = "ip6-map-post-ip4-reass",
1129   .vector_size = sizeof(u32),
1130   .format_trace = format_ip6_map_post_ip4_reass_trace,
1131   .type = VLIB_NODE_TYPE_INTERNAL,
1132   .n_errors = MAP_N_ERROR,
1133   .error_strings = map_error_strings,
1134   .n_next_nodes = IP6_MAP_POST_IP4_REASS_N_NEXT,
1135   .next_nodes = {
1136     [IP6_MAP_POST_IP4_REASS_NEXT_IP4_LOOKUP] = "ip4-lookup",
1137     [IP6_MAP_POST_IP4_REASS_NEXT_IP4_FRAGMENT] = "ip4-frag",
1138     [IP6_MAP_POST_IP4_REASS_NEXT_DROP] = "error-drop",
1139   },
1140 };
1141 /* *INDENT-ON* */
1142
1143 /* *INDENT-OFF* */
1144 VLIB_REGISTER_NODE(ip6_map_icmp_relay_node, static) = {
1145   .function = ip6_map_icmp_relay,
1146   .name = "ip6-map-icmp-relay",
1147   .vector_size = sizeof(u32),
1148   .format_trace = format_map_trace, //FIXME
1149   .type = VLIB_NODE_TYPE_INTERNAL,
1150   .n_errors = MAP_N_ERROR,
1151   .error_strings = map_error_strings,
1152   .n_next_nodes = IP6_ICMP_RELAY_N_NEXT,
1153   .next_nodes = {
1154     [IP6_ICMP_RELAY_NEXT_IP4_LOOKUP] = "ip4-lookup",
1155     [IP6_ICMP_RELAY_NEXT_DROP] = "error-drop",
1156   },
1157 };
1158 /* *INDENT-ON* */
1159
1160 clib_error_t *
1161 ip6_map_init (vlib_main_t * vm)
1162 {
1163   map_main.ip4_sv_reass_custom_next_index =
1164     ip4_sv_reass_custom_register_next_node
1165     (ip6_map_post_ip4_reass_node.index);
1166   return 0;
1167 }
1168
1169 VLIB_INIT_FUNCTION (ip6_map_init) =
1170 {
1171 .runs_after = VLIB_INITS ("map_init"),};
1172
1173 /*
1174  * fd.io coding-style-patch-verification: ON
1175  *
1176  * Local Variables:
1177  * eval: (c-set-style "gnu")
1178  * End:
1179  */