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_add_trace (vm, node, p0, map_domain_index0, port0);
 372             }
 373
 374           if (PREDICT_FALSE (p1->flags & VLIB_BUFFER_IS_TRACED))
 375             {
 376               map_add_trace (vm, node, p1, map_domain_index1, port1);
 377             }
 378
 379           if (error0 == MAP_ERROR_DECAP_SEC_CHECK && mm->icmp6_enabled)
 380             {
 381               /* Set ICMP parameters */
 382               vlib_buffer_advance (p0, -sizeof (ip6_header_t));
 383               icmp6_error_set_vnet_buffer (p0, ICMP6_destination_unreachable,
 384                                            ICMP6_destination_unreachable_source_address_failed_policy,
 385                                            0);
 386               next0 = IP6_MAP_NEXT_ICMP;
 387             }
 388           else
 389             {
 390               next0 = (error0 == MAP_ERROR_NONE) ? next0 : IP6_MAP_NEXT_DROP;
 391             }
 392
 393           if (error1 == MAP_ERROR_DECAP_SEC_CHECK && mm->icmp6_enabled)
 394             {
 395               /* Set ICMP parameters */
 396               vlib_buffer_advance (p1, -sizeof (ip6_header_t));
 397               icmp6_error_set_vnet_buffer (p1, ICMP6_destination_unreachable,
 398                                            ICMP6_destination_unreachable_source_address_failed_policy,
 399                                            0);
 400               next1 = IP6_MAP_NEXT_ICMP;
 401             }
 402           else
 403             {
 404               next1 = (error1 == MAP_ERROR_NONE) ? next1 : IP6_MAP_NEXT_DROP;
 405             }
 406
 407           /* Reset packet */
 408           if (next0 == IP6_MAP_NEXT_IP6_LOCAL)
 409             vlib_buffer_advance (p0, -sizeof (ip6_header_t));
 410           if (next1 == IP6_MAP_NEXT_IP6_LOCAL)
 411             vlib_buffer_advance (p1, -sizeof (ip6_header_t));
 412
 413           p0->error = error_node->errors[error0];
 414           p1->error = error_node->errors[error1];
 415           vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
 416                                            n_left_to_next, pi0, pi1, next0,
 417                                            next1);
 418         }
 419
 420       /* Single loop */
 421       while (n_left_from > 0 && n_left_to_next > 0)
 422         {
 423           u32 pi0;
 424           vlib_buffer_t *p0;
 425           u8 error0 = MAP_ERROR_NONE;
 426           map_domain_t *d0 = 0;
 427           ip4_header_t *ip40;
 428           ip6_header_t *ip60;
 429           i32 port0 = 0;
 430           u32 map_domain_index0 = ~0;
 431           u32 next0 = IP6_MAP_NEXT_IP4_LOOKUP;
 432
 433           pi0 = to_next[0] = from[0];
 434           from += 1;
 435           n_left_from -= 1;
 436           to_next += 1;
 437           n_left_to_next -= 1;
 438
 439           p0 = vlib_get_buffer (vm, pi0);
 440           ip60 = vlib_buffer_get_current (p0);
 441           vlib_buffer_advance (p0, sizeof (ip6_header_t));
 442           ip40 = vlib_buffer_get_current (p0);
 443
 444           /*
 445            * Encapsulated IPv4 packet
 446            *   - IPv4 fragmented -> Pass to virtual reassembly unless security check disabled
 447            *   - Lookup/Rewrite or Fragment node in case of packet > MTU
 448            * Fragmented IPv6 packet
 449            * ICMP IPv6 packet
 450            *   - Error -> Pass to ICMPv6/ICMPv4 relay
 451            *   - Info -> Pass to IPv6 local
 452            * Anything else -> drop
 453            */
 454           if (PREDICT_TRUE
 455               (ip60->protocol == IP_PROTOCOL_IP_IN_IP
 456                && clib_net_to_host_u16 (ip60->payload_length) > 20))
 457             {
 458               d0 =
 459                 ip4_map_get_domain ((ip4_address_t *) & ip40->
 460                                     src_address.as_u32, &map_domain_index0,
 461                                     &error0);
 462             }
 463           else if (ip60->protocol == IP_PROTOCOL_ICMP6 &&
 464                    clib_net_to_host_u16 (ip60->payload_length) >
 465                    sizeof (icmp46_header_t))
 466             {
 467               icmp46_header_t *icmp = (void *) (ip60 + 1);
 468               next0 = (icmp->type == ICMP6_echo_request
 469                        || icmp->type ==
 470                        ICMP6_echo_reply) ? IP6_MAP_NEXT_IP6_LOCAL :
 471                 IP6_MAP_NEXT_IP6_ICMP_RELAY;
 472             }
 473           else if (ip60->protocol == IP_PROTOCOL_IPV6_FRAGMENTATION &&
 474                    (((ip6_frag_hdr_t *) (ip60 + 1))->next_hdr ==
 475                     IP_PROTOCOL_IP_IN_IP))
 476             {
 477               next0 = IP6_MAP_NEXT_IP6_REASS;
 478             }
 479           else
 480             {
 481               /* XXX: Move get_domain to ip6_get_domain lookup on source */
 482               //error0 = MAP_ERROR_BAD_PROTOCOL;
 483               vlib_buffer_advance (p0, -sizeof (ip6_header_t));
 484               vnet_feature_next (&next0, p0);
 485             }
 486
 487           if (d0)
 488             {
 489               /* MAP inbound security check */
 490               ip6_map_security_check (d0, p0, ip40, ip60, &next0, &error0);
 491
 492               if (PREDICT_TRUE (error0 == MAP_ERROR_NONE &&
 493                                 next0 == IP6_MAP_NEXT_IP4_LOOKUP))
 494                 {
 495                   if (PREDICT_FALSE
 496                       (d0->mtu
 497                        && (clib_host_to_net_u16 (ip40->length) > d0->mtu)))
 498                     {
 499                       vnet_buffer (p0)->ip_frag.flags = 0;
 500                       vnet_buffer (p0)->ip_frag.next_index =
 501                         IP4_FRAG_NEXT_IP4_LOOKUP;
 502                       vnet_buffer (p0)->ip_frag.mtu = d0->mtu;
 503                       next0 = IP6_MAP_NEXT_IP4_FRAGMENT;
 504                     }
 505                   else
 506                     {
 507                       next0 =
 508                         ip6_map_ip4_lookup_bypass (p0,
 509                                                    ip40) ?
 510                         IP6_MAP_NEXT_IP4_REWRITE : next0;
 511                     }
 512                   vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_RX,
 513                                                    thread_index,
 514                                                    map_domain_index0, 1,
 515                                                    clib_net_to_host_u16
 516                                                    (ip40->length));
 517                 }
 518             }
 519
 520           if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
 521             {
 522               map_add_trace (vm, node, p0, map_domain_index0, port0);
 523             }
 524
 525           if (mm->icmp6_enabled &&
 526               (error0 == MAP_ERROR_DECAP_SEC_CHECK
 527                || error0 == MAP_ERROR_NO_DOMAIN))
 528             {
 529               /* Set ICMP parameters */
 530               vlib_buffer_advance (p0, -sizeof (ip6_header_t));
 531               icmp6_error_set_vnet_buffer (p0, ICMP6_destination_unreachable,
 532                                            ICMP6_destination_unreachable_source_address_failed_policy,
 533                                            0);
 534               next0 = IP6_MAP_NEXT_ICMP;
 535             }
 536           else
 537             {
 538               next0 = (error0 == MAP_ERROR_NONE) ? next0 : IP6_MAP_NEXT_DROP;
 539             }
 540
 541           /* Reset packet */
 542           if (next0 == IP6_MAP_NEXT_IP6_LOCAL)
 543             vlib_buffer_advance (p0, -sizeof (ip6_header_t));
 544
 545           p0->error = error_node->errors[error0];
 546           vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
 547                                            n_left_to_next, pi0, next0);
 548         }
 549       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 550     }
 551
 552   return frame->n_vectors;
 553 }
 554
 555
 556 static_always_inline void
 557 ip6_map_ip6_reass_prepare (vlib_main_t * vm, vlib_node_runtime_t * node,
 558                            map_ip6_reass_t * r, u32 ** fragments_ready,
 559                            u32 ** fragments_to_drop)
 560 {
 561   ip4_header_t *ip40;
 562   ip6_header_t *ip60;
 563   ip6_frag_hdr_t *frag0;
 564   vlib_buffer_t *p0;
 565
 566   if (!r->ip4_header.ip_version_and_header_length)
 567     return;
 568
 569   //The IP header is here, we need to check for packets
 570   //that can be forwarded
 571   int i;
 572   for (i = 0; i < MAP_IP6_REASS_MAX_FRAGMENTS_PER_REASSEMBLY; i++)
 573     {
 574       if (r->fragments[i].pi == ~0 ||
 575           ((!r->fragments[i].next_data_len)
 576            && (r->fragments[i].next_data_offset != (0xffff))))
 577         continue;
 578
 579       p0 = vlib_get_buffer (vm, r->fragments[i].pi);
 580       ip60 = vlib_buffer_get_current (p0);
 581       frag0 = (ip6_frag_hdr_t *) (ip60 + 1);
 582       ip40 = (ip4_header_t *) (frag0 + 1);
 583
 584       if (ip6_frag_hdr_offset (frag0))
 585         {
 586           //Not first fragment, add the IPv4 header
 587           clib_memcpy_fast (ip40, &r->ip4_header, 20);
 588         }
 589
 590 #ifdef MAP_IP6_REASS_COUNT_BYTES
 591       r->forwarded +=
 592         clib_net_to_host_u16 (ip60->payload_length) - sizeof (*frag0);
 593 #endif
 594
 595       if (ip6_frag_hdr_more (frag0))
 596         {
 597           //Not last fragment, we copy end of next
 598           clib_memcpy_fast (u8_ptr_add (ip60, p0->current_length),
 599                             r->fragments[i].next_data, 20);
 600           p0->current_length += 20;
 601           ip60->payload_length = u16_net_add (ip60->payload_length, 20);
 602         }
 603
 604       if (!ip4_is_fragment (ip40))
 605         {
 606           ip40->fragment_id = frag_id_6to4 (frag0->identification);
 607           ip40->flags_and_fragment_offset =
 608             clib_host_to_net_u16 (ip6_frag_hdr_offset (frag0));
 609         }
 610       else
 611         {
 612           ip40->flags_and_fragment_offset =
 613             clib_host_to_net_u16 (ip4_get_fragment_offset (ip40) +
 614                                   ip6_frag_hdr_offset (frag0));
 615         }
 616
 617       if (ip6_frag_hdr_more (frag0))
 618         ip40->flags_and_fragment_offset |=
 619           clib_host_to_net_u16 (IP4_HEADER_FLAG_MORE_FRAGMENTS);
 620
 621       ip40->length =
 622         clib_host_to_net_u16 (p0->current_length - sizeof (*ip60) -
 623                               sizeof (*frag0));
 624       ip40->checksum = ip4_header_checksum (ip40);
 625
 626       if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
 627         {
 628           map_ip6_map_ip6_reass_trace_t *tr =
 629             vlib_add_trace (vm, node, p0, sizeof (*tr));
 630           tr->offset = ip4_get_fragment_offset (ip40);
 631           tr->frag_len = clib_net_to_host_u16 (ip40->length) - sizeof (*ip40);
 632           tr->out = 1;
 633         }
 634
 635       vec_add1 (*fragments_ready, r->fragments[i].pi);
 636       r->fragments[i].pi = ~0;
 637       r->fragments[i].next_data_len = 0;
 638       r->fragments[i].next_data_offset = 0;
 639       map_main.ip6_reass_buffered_counter--;
 640
 641       //TODO: Best solution would be that ip6_map handles extension headers
 642       // and ignores atomic fragment. But in the meantime, let's just copy the header.
 643
 644       u8 protocol = frag0->next_hdr;
 645       memmove (u8_ptr_add (ip40, -sizeof (*ip60)), ip60, sizeof (*ip60));
 646       ((ip6_header_t *) u8_ptr_add (ip40, -sizeof (*ip60)))->protocol =
 647         protocol;
 648       vlib_buffer_advance (p0, sizeof (*frag0));
 649     }
 650 }
 651
 652 void
 653 map_ip6_drop_pi (u32 pi)
 654 {
 655   vlib_main_t *vm = vlib_get_main ();
 656   vlib_node_runtime_t *n =
 657     vlib_node_get_runtime (vm, ip6_map_ip6_reass_node.index);
 658   vlib_set_next_frame_buffer (vm, n, IP6_MAP_IP6_REASS_NEXT_DROP, pi);
 659 }
 660
 661 /*
 662  * ip6_reass
 663  * TODO: We should count the number of successfully
 664  * transmitted fragment bytes and compare that to the last fragment
 665  * offset such that we can free the reassembly structure when all fragments
 666  * have been forwarded.
 667  */
 668 static uword
 669 ip6_map_ip6_reass (vlib_main_t * vm,
 670                    vlib_node_runtime_t * node, vlib_frame_t * frame)
 671 {
 672   u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
 673   vlib_node_runtime_t *error_node =
 674     vlib_node_get_runtime (vm, ip6_map_ip6_reass_node.index);
 675   u32 *fragments_to_drop = NULL;
 676   u32 *fragments_ready = NULL;
 677
 678   from = vlib_frame_vector_args (frame);
 679   n_left_from = frame->n_vectors;
 680   next_index = node->cached_next_index;
 681   while (n_left_from > 0)
 682     {
 683       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
 684
 685       /* Single loop */
 686       while (n_left_from > 0 && n_left_to_next > 0)
 687         {
 688           u32 pi0;
 689           vlib_buffer_t *p0;
 690           u8 error0 = MAP_ERROR_NONE;
 691           ip6_header_t *ip60;
 692           ip6_frag_hdr_t *frag0;
 693           u16 offset;
 694           u16 next_offset;
 695           u16 frag_len;
 696
 697           pi0 = to_next[0] = from[0];
 698           from += 1;
 699           n_left_from -= 1;
 700           to_next += 1;
 701           n_left_to_next -= 1;
 702
 703           p0 = vlib_get_buffer (vm, pi0);
 704           ip60 = vlib_buffer_get_current (p0);
 705           frag0 = (ip6_frag_hdr_t *) (ip60 + 1);
 706           offset =
 707             clib_host_to_net_u16 (frag0->fragment_offset_and_more) & (~7);
 708           frag_len =
 709             clib_net_to_host_u16 (ip60->payload_length) - sizeof (*frag0);
 710           next_offset =
 711             ip6_frag_hdr_more (frag0) ? (offset + frag_len) : (0xffff);
 712
 713           //FIXME: Support other extension headers, maybe
 714
 715           if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
 716             {
 717               map_ip6_map_ip6_reass_trace_t *tr =
 718                 vlib_add_trace (vm, node, p0, sizeof (*tr));
 719               tr->offset = offset;
 720               tr->frag_len = frag_len;
 721               tr->out = 0;
 722             }
 723
 724           map_ip6_reass_lock ();
 725           map_ip6_reass_t *r =
 726             map_ip6_reass_get (&ip60->src_address, &ip60->dst_address,
 727                                frag0->identification, frag0->next_hdr,
 728                                &fragments_to_drop);
 729           //FIXME: Use better error codes
 730           if (PREDICT_FALSE (!r))
 731             {
 732               // Could not create a caching entry
 733               error0 = MAP_ERROR_FRAGMENT_MEMORY;
 734             }
 735           else if (PREDICT_FALSE ((frag_len <= 20 &&
 736                                    (ip6_frag_hdr_more (frag0) || (!offset)))))
 737             {
 738               //Very small fragment are restricted to the last one and
 739               //can't be the first one
 740               error0 = MAP_ERROR_FRAGMENT_MALFORMED;
 741             }
 742           else
 743             if (map_ip6_reass_add_fragment
 744                 (r, pi0, offset, next_offset, (u8 *) (frag0 + 1), frag_len))
 745             {
 746               map_ip6_reass_free (r, &fragments_to_drop);
 747               error0 = MAP_ERROR_FRAGMENT_MEMORY;
 748             }
 749           else
 750             {
 751 #ifdef MAP_IP6_REASS_COUNT_BYTES
 752               if (!ip6_frag_hdr_more (frag0))
 753                 r->expected_total = offset + frag_len;
 754 #endif
 755               ip6_map_ip6_reass_prepare (vm, node, r, &fragments_ready,
 756                                          &fragments_to_drop);
 757 #ifdef MAP_IP6_REASS_COUNT_BYTES
 758               if (r->forwarded >= r->expected_total)
 759                 map_ip6_reass_free (r, &fragments_to_drop);
 760 #endif
 761             }
 762           map_ip6_reass_unlock ();
 763
 764           if (error0 == MAP_ERROR_NONE)
 765             {
 766               if (frag_len > 20)
 767                 {
 768                   //Dequeue the packet
 769                   n_left_to_next++;
 770                   to_next--;
 771                 }
 772               else
 773                 {
 774                   //All data from that packet was copied no need to keep it, but this is not an error
 775                   p0->error = error_node->errors[MAP_ERROR_NONE];
 776                   vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
 777                                                    to_next, n_left_to_next,
 778                                                    pi0,
 779                                                    IP6_MAP_IP6_REASS_NEXT_DROP);
 780                 }
 781             }
 782           else
 783             {
 784               p0->error = error_node->errors[error0];
 785               vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
 786                                                n_left_to_next, pi0,
 787                                                IP6_MAP_IP6_REASS_NEXT_DROP);
 788             }
 789         }
 790       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 791     }
 792
 793   map_send_all_to_node (vm, fragments_ready, node,
 794                         &error_node->errors[MAP_ERROR_NONE],
 795                         IP6_MAP_IP6_REASS_NEXT_IP6_MAP);
 796   map_send_all_to_node (vm, fragments_to_drop, node,
 797                         &error_node->errors[MAP_ERROR_FRAGMENT_DROPPED],
 798                         IP6_MAP_IP6_REASS_NEXT_DROP);
 799
 800   vec_free (fragments_to_drop);
 801   vec_free (fragments_ready);
 802   return frame->n_vectors;
 803 }
 804
 805 /*
 806  * ip6_map_post_ip4_reass
 807  */
 808 static uword
 809 ip6_map_post_ip4_reass (vlib_main_t * vm,
 810                         vlib_node_runtime_t * node, vlib_frame_t * frame)
 811 {
 812   u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
 813   vlib_node_runtime_t *error_node =
 814     vlib_node_get_runtime (vm, ip6_map_post_ip4_reass_node.index);
 815   map_main_t *mm = &map_main;
 816   vlib_combined_counter_main_t *cm = mm->domain_counters;
 817   u32 thread_index = vm->thread_index;
 818
 819   from = vlib_frame_vector_args (frame);
 820   n_left_from = frame->n_vectors;
 821   next_index = node->cached_next_index;
 822   while (n_left_from > 0)
 823     {
 824       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
 825
 826       /* Single loop */
 827       while (n_left_from > 0 && n_left_to_next > 0)
 828         {
 829           u32 pi0;
 830           vlib_buffer_t *p0;
 831           u8 error0 = MAP_ERROR_NONE;
 832           map_domain_t *d0;
 833           ip4_header_t *ip40;
 834           ip6_header_t *ip60;
 835           i32 port0 = 0;
 836           u32 map_domain_index0 = ~0;
 837           u32 next0 = IP6_MAP_POST_IP4_REASS_NEXT_IP4_LOOKUP;
 838
 839           pi0 = to_next[0] = from[0];
 840           from += 1;
 841           n_left_from -= 1;
 842           to_next += 1;
 843           n_left_to_next -= 1;
 844
 845           p0 = vlib_get_buffer (vm, pi0);
 846           ip40 = vlib_buffer_get_current (p0);
 847           ip60 = ((ip6_header_t *) ip40) - 1;
 848
 849           d0 =
 850             ip4_map_get_domain ((ip4_address_t *) & ip40->src_address.as_u32,
 851                                 &map_domain_index0, &error0);
 852
 853           port0 = vnet_buffer (p0)->ip.reass.l4_src_port;
 854
 855           if (PREDICT_TRUE (error0 == MAP_ERROR_NONE))
 856             error0 =
 857               ip6_map_sec_check (d0, port0, ip40,
 858                                  ip60) ? MAP_ERROR_NONE :
 859               MAP_ERROR_DECAP_SEC_CHECK;
 860
 861           if (PREDICT_FALSE
 862               (d0->mtu && (clib_host_to_net_u16 (ip40->length) > d0->mtu)
 863                && error0 == MAP_ERROR_NONE))
 864             {
 865               vnet_buffer (p0)->ip_frag.flags = 0;
 866               vnet_buffer (p0)->ip_frag.next_index = IP4_FRAG_NEXT_IP4_LOOKUP;
 867               vnet_buffer (p0)->ip_frag.mtu = d0->mtu;
 868               next0 = IP6_MAP_POST_IP4_REASS_NEXT_IP4_FRAGMENT;
 869             }
 870
 871           if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
 872             {
 873               map_ip6_map_ip4_reass_trace_t *tr =
 874                 vlib_add_trace (vm, node, p0, sizeof (*tr));
 875               tr->map_domain_index = map_domain_index0;
 876               tr->port = port0;
 877             }
 878
 879           if (error0 == MAP_ERROR_NONE)
 880             vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_RX,
 881                                              thread_index,
 882                                              map_domain_index0, 1,
 883                                              clib_net_to_host_u16
 884                                              (ip40->length));
 885           next0 =
 886             (error0 ==
 887              MAP_ERROR_NONE) ? next0 : IP6_MAP_POST_IP4_REASS_NEXT_DROP;
 888           p0->error = error_node->errors[error0];
 889           vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
 890                                            n_left_to_next, pi0, next0);
 891
 892         }
 893       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 894     }
 895   return frame->n_vectors;
 896 }
 897
 898 /*
 899  * ip6_icmp_relay
 900  */
 901 static uword
 902 ip6_map_icmp_relay (vlib_main_t * vm,
 903                     vlib_node_runtime_t * node, vlib_frame_t * frame)
 904 {
 905   u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
 906   vlib_node_runtime_t *error_node =
 907     vlib_node_get_runtime (vm, ip6_map_icmp_relay_node.index);
 908   map_main_t *mm = &map_main;
 909   u32 thread_index = vm->thread_index;
 910   u16 *fragment_ids, *fid;
 911
 912   from = vlib_frame_vector_args (frame);
 913   n_left_from = frame->n_vectors;
 914   next_index = node->cached_next_index;
 915
 916   /* Get random fragment IDs for replies. */
 917   fid = fragment_ids =
 918     clib_random_buffer_get_data (&vm->random_buffer,
 919                                  n_left_from * sizeof (fragment_ids[0]));
 920
 921   while (n_left_from > 0)
 922     {
 923       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
 924
 925       /* Single loop */
 926       while (n_left_from > 0 && n_left_to_next > 0)
 927         {
 928           u32 pi0;
 929           vlib_buffer_t *p0;
 930           u8 error0 = MAP_ERROR_NONE;
 931           ip6_header_t *ip60;
 932           u32 next0 = IP6_ICMP_RELAY_NEXT_IP4_LOOKUP;
 933           u32 mtu;
 934
 935           pi0 = to_next[0] = from[0];
 936           from += 1;
 937           n_left_from -= 1;
 938           to_next += 1;
 939           n_left_to_next -= 1;
 940
 941           p0 = vlib_get_buffer (vm, pi0);
 942           ip60 = vlib_buffer_get_current (p0);
 943           u16 tlen = clib_net_to_host_u16 (ip60->payload_length);
 944
 945           /*
 946            * In:
 947            *  IPv6 header           (40)
 948            *  ICMPv6 header          (8)
 949            *  IPv6 header           (40)
 950            *  Original IPv4 header / packet
 951            * Out:
 952            *  New IPv4 header
 953            *  New ICMP header
 954            *  Original IPv4 header / packet
 955            */
 956
 957           /* Need at least ICMP(8) + IPv6(40) + IPv4(20) + L4 header(8) */
 958           if (tlen < 76)
 959             {
 960               error0 = MAP_ERROR_ICMP_RELAY;
 961               goto error;
 962             }
 963
 964           icmp46_header_t *icmp60 = (icmp46_header_t *) (ip60 + 1);
 965           ip6_header_t *inner_ip60 = (ip6_header_t *) (icmp60 + 2);
 966
 967           if (inner_ip60->protocol != IP_PROTOCOL_IP_IN_IP)
 968             {
 969               error0 = MAP_ERROR_ICMP_RELAY;
 970               goto error;
 971             }
 972
 973           ip4_header_t *inner_ip40 = (ip4_header_t *) (inner_ip60 + 1);
 974           vlib_buffer_advance (p0, 60); /* sizeof ( IPv6 + ICMP + IPv6 - IPv4 - ICMP ) */
 975           ip4_header_t *new_ip40 = vlib_buffer_get_current (p0);
 976           icmp46_header_t *new_icmp40 = (icmp46_header_t *) (new_ip40 + 1);
 977
 978           /*
 979            * Relay according to RFC2473, section 8.3
 980            */
 981           switch (icmp60->type)
 982             {
 983             case ICMP6_destination_unreachable:
 984             case ICMP6_time_exceeded:
 985             case ICMP6_parameter_problem:
 986               /* Type 3 - destination unreachable, Code 1 - host unreachable */
 987               new_icmp40->type = ICMP4_destination_unreachable;
 988               new_icmp40->code =
 989                 ICMP4_destination_unreachable_destination_unreachable_host;
 990               break;
 991
 992             case ICMP6_packet_too_big:
 993               /* Type 3 - destination unreachable, Code 4 - packet too big */
 994               /* Potential TODO: Adjust domain tunnel MTU based on the value received here */
 995               mtu = clib_net_to_host_u32 (*((u32 *) (icmp60 + 1)));
 996
 997               /* Check DF flag */
 998               if (!
 999                   (inner_ip40->flags_and_fragment_offset &
1000                    clib_host_to_net_u16 (IP4_HEADER_FLAG_DONT_FRAGMENT)))
1001                 {
1002                   error0 = MAP_ERROR_ICMP_RELAY;
1003                   goto error;
1004                 }
1005
1006               new_icmp40->type = ICMP4_destination_unreachable;
1007               new_icmp40->code =
1008                 ICMP4_destination_unreachable_fragmentation_needed_and_dont_fragment_set;
1009               *((u32 *) (new_icmp40 + 1)) =
1010                 clib_host_to_net_u32 (mtu < 1280 ? 1280 : mtu);
1011               break;
1012
1013             default:
1014               error0 = MAP_ERROR_ICMP_RELAY;
1015               break;
1016             }
1017
1018           /*
1019            * Ensure the total ICMP packet is no longer than 576 bytes (RFC1812)
1020            */
1021           new_ip40->ip_version_and_header_length = 0x45;
1022           new_ip40->tos = 0;
1023           u16 nlen = (tlen - 20) > 576 ? 576 : tlen - 20;
1024           new_ip40->length = clib_host_to_net_u16 (nlen);
1025           new_ip40->fragment_id = fid[0];
1026           fid++;
1027           new_ip40->ttl = 64;
1028           new_ip40->protocol = IP_PROTOCOL_ICMP;
1029           new_ip40->src_address = mm->icmp4_src_address;
1030           new_ip40->dst_address = inner_ip40->src_address;
1031           new_ip40->checksum = ip4_header_checksum (new_ip40);
1032
1033           new_icmp40->checksum = 0;
1034           ip_csum_t sum = ip_incremental_checksum (0, new_icmp40, nlen - 20);
1035           new_icmp40->checksum = ~ip_csum_fold (sum);
1036
1037           vlib_increment_simple_counter (&mm->icmp_relayed, thread_index, 0,
1038                                          1);
1039
1040         error:
1041           if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
1042             {
1043               map_trace_t *tr = vlib_add_trace (vm, node, p0, sizeof (*tr));
1044               tr->map_domain_index = 0;
1045               tr->port = 0;
1046             }
1047
1048           next0 =
1049             (error0 == MAP_ERROR_NONE) ? next0 : IP6_ICMP_RELAY_NEXT_DROP;
1050           p0->error = error_node->errors[error0];
1051           vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1052                                            n_left_to_next, pi0, next0);
1053         }
1054       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1055     }
1056
1057   return frame->n_vectors;
1058
1059 }
1060
1061 static char *map_error_strings[] = {
1062 #define _(sym,string) string,
1063   foreach_map_error
1064 #undef _
1065 };
1066
1067 /* *INDENT-OFF* */
1068 VNET_FEATURE_INIT (ip6_map_feature, static) =
1069 {
1070   .arc_name = "ip6-unicast",
1071   .node_name = "ip6-map",
1072   .runs_before = VNET_FEATURES ("ip6-flow-classify"),
1073 };
1074
1075 VLIB_REGISTER_NODE(ip6_map_node) = {
1076   .function = ip6_map,
1077   .name = "ip6-map",
1078   .vector_size = sizeof(u32),
1079   .format_trace = format_map_trace,
1080   .type = VLIB_NODE_TYPE_INTERNAL,
1081
1082   .n_errors = MAP_N_ERROR,
1083   .error_strings = map_error_strings,
1084
1085   .n_next_nodes = IP6_MAP_N_NEXT,
1086   .next_nodes = {
1087     [IP6_MAP_NEXT_IP4_LOOKUP] = "ip4-lookup",
1088 #ifdef MAP_SKIP_IP6_LOOKUP
1089     [IP6_MAP_NEXT_IP4_REWRITE] = "ip4-load-balance",
1090 #endif
1091     [IP6_MAP_NEXT_IP6_REASS] = "ip6-map-ip6-reass",
1092     [IP6_MAP_NEXT_IP4_REASS] = "ip4-sv-reassembly-custom-next",
1093     [IP6_MAP_NEXT_IP4_FRAGMENT] = "ip4-frag",
1094     [IP6_MAP_NEXT_IP6_ICMP_RELAY] = "ip6-map-icmp-relay",
1095     [IP6_MAP_NEXT_IP6_LOCAL] = "ip6-local",
1096     [IP6_MAP_NEXT_DROP] = "error-drop",
1097     [IP6_MAP_NEXT_ICMP] = "ip6-icmp-error",
1098   },
1099 };
1100 /* *INDENT-ON* */
1101
1102 /* *INDENT-OFF* */
1103 VLIB_REGISTER_NODE(ip6_map_ip6_reass_node) = {
1104   .function = ip6_map_ip6_reass,
1105   .name = "ip6-map-ip6-reass",
1106   .vector_size = sizeof(u32),
1107   .format_trace = format_ip6_map_ip6_reass_trace,
1108   .type = VLIB_NODE_TYPE_INTERNAL,
1109   .n_errors = MAP_N_ERROR,
1110   .error_strings = map_error_strings,
1111   .n_next_nodes = IP6_MAP_IP6_REASS_N_NEXT,
1112   .next_nodes = {
1113     [IP6_MAP_IP6_REASS_NEXT_IP6_MAP] = "ip6-map",
1114     [IP6_MAP_IP6_REASS_NEXT_DROP] = "error-drop",
1115   },
1116 };
1117 /* *INDENT-ON* */
1118
1119 /* *INDENT-OFF* */
1120 VLIB_REGISTER_NODE(ip6_map_post_ip4_reass_node) = {
1121   .function = ip6_map_post_ip4_reass,
1122   .name = "ip6-map-post-ip4-reass",
1123   .vector_size = sizeof(u32),
1124   .format_trace = format_ip6_map_post_ip4_reass_trace,
1125   .type = VLIB_NODE_TYPE_INTERNAL,
1126   .n_errors = MAP_N_ERROR,
1127   .error_strings = map_error_strings,
1128   .n_next_nodes = IP6_MAP_POST_IP4_REASS_N_NEXT,
1129   .next_nodes = {
1130     [IP6_MAP_POST_IP4_REASS_NEXT_IP4_LOOKUP] = "ip4-lookup",
1131     [IP6_MAP_POST_IP4_REASS_NEXT_IP4_FRAGMENT] = "ip4-frag",
1132     [IP6_MAP_POST_IP4_REASS_NEXT_DROP] = "error-drop",
1133   },
1134 };
1135 /* *INDENT-ON* */
1136
1137 /* *INDENT-OFF* */
1138 VLIB_REGISTER_NODE(ip6_map_icmp_relay_node, static) = {
1139   .function = ip6_map_icmp_relay,
1140   .name = "ip6-map-icmp-relay",
1141   .vector_size = sizeof(u32),
1142   .format_trace = format_map_trace, //FIXME
1143   .type = VLIB_NODE_TYPE_INTERNAL,
1144   .n_errors = MAP_N_ERROR,
1145   .error_strings = map_error_strings,
1146   .n_next_nodes = IP6_ICMP_RELAY_N_NEXT,
1147   .next_nodes = {
1148     [IP6_ICMP_RELAY_NEXT_IP4_LOOKUP] = "ip4-lookup",
1149     [IP6_ICMP_RELAY_NEXT_DROP] = "error-drop",
1150   },
1151 };
1152 /* *INDENT-ON* */
1153
1154 clib_error_t *
1155 ip6_map_init (vlib_main_t * vm)
1156 {
1157   map_main.ip4_sv_reass_custom_next_index =
1158     ip4_sv_reass_custom_register_next_node
1159     (ip6_map_post_ip4_reass_node.index);
1160   return 0;
1161 }
1162
1163 VLIB_INIT_FUNCTION (ip6_map_init) =
1164 {
1165 .runs_after = VLIB_INITS ("map_init"),};
1166
1167 /*
1168  * fd.io coding-style-patch-verification: ON
1169  *
1170  * Local Variables:
1171  * eval: (c-set-style "gnu")
1172  * End:
1173  */