src/vnet/ip/ip6_neighbor.c

   1 /*
   2  * ip/ip6_neighbor.c: IP6 neighbor handling
   3  *
   4  * Copyright (c) 2010 Cisco and/or its affiliates.
   5  * Licensed under the Apache License, Version 2.0 (the "License");
   6  * you may not use this file except in compliance with the License.
   7  * You may obtain a copy of the License at:
   8  *
   9  *     http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  * Unless required by applicable law or agreed to in writing, software
  12  * distributed under the License is distributed on an "AS IS" BASIS,
  13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  * See the License for the specific language governing permissions and
  15  * limitations under the License.
  16  */
  17
  18 #include <vnet/ip/ip.h>
  19 #include <vnet/ip/ip6_neighbor.h>
  20 #include <vnet/ethernet/ethernet.h>
  21 #include <vppinfra/mhash.h>
  22 #include <vppinfra/md5.h>
  23 #include <vnet/adj/adj.h>
  24 #include <vnet/adj/adj_mcast.h>
  25 #include <vnet/fib/fib_table.h>
  26 #include <vnet/fib/ip6_fib.h>
  27 #include <vnet/mfib/ip6_mfib.h>
  28
  29 /**
  30  * @file
  31  * @brief IPv6 Neighbor Adjacency and Neighbor Discovery.
  32  *
  33  * The files contains the API and CLI code for managing IPv6 neighbor
  34  * adjacency tables and neighbor discovery logic.
  35  */
  36
  37 /* can't use sizeof link_layer_address, that's 8 */
  38 #define ETHER_MAC_ADDR_LEN 6
  39
  40 /* advertised prefix option */
  41 typedef struct
  42 {
  43   /* basic advertised information */
  44   ip6_address_t prefix;
  45   u8 prefix_len;
  46   int adv_on_link_flag;
  47   int adv_autonomous_flag;
  48   u32 adv_valid_lifetime_in_secs;
  49   u32 adv_pref_lifetime_in_secs;
  50
  51   /* advertised values are computed from these times if decrementing */
  52   f64 valid_lifetime_expires;
  53   f64 pref_lifetime_expires;
  54
  55   /* local information */
  56   int enabled;
  57   int deprecated_prefix_flag;
  58   int decrement_lifetime_flag;
  59
  60 #define MIN_ADV_VALID_LIFETIME 7203     /* seconds */
  61 #define DEF_ADV_VALID_LIFETIME  2592000
  62 #define DEF_ADV_PREF_LIFETIME 604800
  63
  64   /* extensions are added here, mobile, DNS etc.. */
  65 } ip6_radv_prefix_t;
  66
  67
  68 typedef struct
  69 {
  70   /* group information */
  71   u8 type;
  72   ip6_address_t mcast_address;
  73   u16 num_sources;
  74   ip6_address_t *mcast_source_address_pool;
  75 } ip6_mldp_group_t;
  76
  77 /* configured router advertisement information per ipv6 interface */
  78 typedef struct
  79 {
  80
  81   /* advertised config information, zero means unspecified  */
  82   u8 curr_hop_limit;
  83   int adv_managed_flag;
  84   int adv_other_flag;
  85   u16 adv_router_lifetime_in_sec;
  86   u32 adv_neighbor_reachable_time_in_msec;
  87   u32 adv_time_in_msec_between_retransmitted_neighbor_solicitations;
  88
  89   /* mtu option */
  90   u32 adv_link_mtu;
  91
  92   /* source link layer option */
  93   u8 link_layer_address[8];
  94   u8 link_layer_addr_len;
  95
  96   /* prefix option */
  97   ip6_radv_prefix_t *adv_prefixes_pool;
  98
  99   /* Hash table mapping address to index in interface advertised  prefix pool. */
 100   mhash_t address_to_prefix_index;
 101
 102   /* MLDP  group information */
 103   ip6_mldp_group_t *mldp_group_pool;
 104
 105   /* Hash table mapping address to index in mldp address pool. */
 106   mhash_t address_to_mldp_index;
 107
 108   /* local information */
 109   u32 sw_if_index;
 110   int send_radv;                /* radv on/off on this interface -  set by config */
 111   int cease_radv;               /* we are ceasing  to send  - set byf config */
 112   int send_unicast;
 113   int adv_link_layer_address;
 114   int prefix_option;
 115   int failed_device_check;
 116   int all_routers_mcast;
 117   u32 seed;
 118   u64 randomizer;
 119   int ref_count;
 120   adj_index_t mcast_adj_index;
 121
 122   /* timing information */
 123 #define DEF_MAX_RADV_INTERVAL 200
 124 #define DEF_MIN_RADV_INTERVAL .75 * DEF_MAX_RADV_INTERVAL
 125 #define DEF_CURR_HOP_LIMIT  64
 126 #define DEF_DEF_RTR_LIFETIME   3 * DEF_MAX_RADV_INTERVAL
 127 #define MAX_DEF_RTR_LIFETIME   9000
 128
 129 #define MAX_INITIAL_RTR_ADVERT_INTERVAL   16    /* seconds */
 130 #define MAX_INITIAL_RTR_ADVERTISEMENTS        3 /*transmissions */
 131 #define MIN_DELAY_BETWEEN_RAS                              3    /* seconds */
 132 #define MAX_DELAY_BETWEEN_RAS                    1800   /* seconds */
 133 #define MAX_RA_DELAY_TIME                                          .5   /* seconds */
 134
 135   f64 max_radv_interval;
 136   f64 min_radv_interval;
 137   f64 min_delay_between_radv;
 138   f64 max_delay_between_radv;
 139   f64 max_rtr_default_lifetime;
 140
 141   f64 last_radv_time;
 142   f64 last_multicast_time;
 143   f64 next_multicast_time;
 144
 145
 146   u32 initial_adverts_count;
 147   f64 initial_adverts_interval;
 148   u32 initial_adverts_sent;
 149
 150   /* stats */
 151   u32 n_advertisements_sent;
 152   u32 n_solicitations_rcvd;
 153   u32 n_solicitations_dropped;
 154
 155   /* Link local address to use (defaults to underlying physical for logical interfaces */
 156   ip6_address_t link_local_address;
 157 } ip6_radv_t;
 158
 159 typedef struct
 160 {
 161   u32 next_index;
 162   uword node_index;
 163   uword type_opaque;
 164   uword data;
 165   /* Used for nd event notification only */
 166   void *data_callback;
 167   u32 pid;
 168 } pending_resolution_t;
 169
 170
 171 typedef struct
 172 {
 173   /* Hash tables mapping name to opcode. */
 174   uword *opcode_by_name;
 175
 176   /* lite beer "glean" adjacency handling */
 177   mhash_t pending_resolutions_by_address;
 178   pending_resolution_t *pending_resolutions;
 179
 180   /* Mac address change notification */
 181   mhash_t mac_changes_by_address;
 182   pending_resolution_t *mac_changes;
 183
 184   u32 *neighbor_input_next_index_by_hw_if_index;
 185
 186   ip6_neighbor_t *neighbor_pool;
 187
 188   mhash_t neighbor_index_by_key;
 189
 190   u32 *if_radv_pool_index_by_sw_if_index;
 191
 192   ip6_radv_t *if_radv_pool;
 193
 194   /* Neighbor attack mitigation */
 195   u32 limit_neighbor_cache_size;
 196   u32 neighbor_delete_rotor;
 197
 198 } ip6_neighbor_main_t;
 199
 200 /* ipv6 neighbor discovery - timer/event types */
 201 typedef enum
 202 {
 203   ICMP6_ND_EVENT_INIT,
 204 } ip6_icmp_neighbor_discovery_event_type_t;
 205
 206 typedef union
 207 {
 208   u32 add_del_swindex;
 209   struct
 210   {
 211     u32 up_down_swindex;
 212     u32 fib_index;
 213   } up_down_event;
 214 } ip6_icmp_neighbor_discovery_event_data_t;
 215
 216 static ip6_neighbor_main_t ip6_neighbor_main;
 217 static ip6_address_t ip6a_zero; /* ip6 address 0 */
 218
 219 static u8 *
 220 format_ip6_neighbor_ip6_entry (u8 * s, va_list * va)
 221 {
 222   vlib_main_t *vm = va_arg (*va, vlib_main_t *);
 223   ip6_neighbor_t *n = va_arg (*va, ip6_neighbor_t *);
 224   vnet_main_t *vnm = vnet_get_main ();
 225   vnet_sw_interface_t *si;
 226   u8 *flags = 0;
 227
 228   if (!n)
 229     return format (s, "%=12s%=20s%=6s%=20s%=40s", "Time", "Address", "Flags",
 230                    "Link layer", "Interface");
 231
 232   if (n->flags & IP6_NEIGHBOR_FLAG_DYNAMIC)
 233     flags = format (flags, "D");
 234
 235   if (n->flags & IP6_NEIGHBOR_FLAG_STATIC)
 236     flags = format (flags, "S");
 237
 238   if (n->flags & IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY)
 239     flags = format (flags, "N");
 240
 241   si = vnet_get_sw_interface (vnm, n->key.sw_if_index);
 242   s = format (s, "%=12U%=20U%=6s%=20U%=40U",
 243               format_vlib_cpu_time, vm, n->cpu_time_last_updated,
 244               format_ip6_address, &n->key.ip6_address,
 245               flags ? (char *) flags : "",
 246               format_ethernet_address, n->link_layer_address,
 247               format_vnet_sw_interface_name, vnm, si);
 248
 249   vec_free (flags);
 250   return s;
 251 }
 252
 253 static clib_error_t *
 254 ip6_neighbor_sw_interface_up_down (vnet_main_t * vnm,
 255                                    u32 sw_if_index, u32 flags)
 256 {
 257   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
 258   ip6_neighbor_t *n;
 259
 260   if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
 261     {
 262       u32 i, *to_delete = 0;
 263
 264       /* *INDENT-OFF* */
 265       pool_foreach (n, nm->neighbor_pool,
 266       ({
 267         if (n->key.sw_if_index == sw_if_index)
 268           vec_add1 (to_delete, n - nm->neighbor_pool);
 269       }));
 270       /* *INDENT-ON* */
 271
 272       for (i = 0; i < vec_len (to_delete); i++)
 273         {
 274           n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
 275           mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
 276           fib_table_entry_delete_index (n->fib_entry_index, FIB_SOURCE_ADJ);
 277           pool_put (nm->neighbor_pool, n);
 278         }
 279
 280       vec_free (to_delete);
 281     }
 282
 283   return 0;
 284 }
 285
 286 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_neighbor_sw_interface_up_down);
 287
 288 static void
 289 unset_random_neighbor_entry (void)
 290 {
 291   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
 292   vnet_main_t *vnm = vnet_get_main ();
 293   vlib_main_t *vm = vnm->vlib_main;
 294   ip6_neighbor_t *e;
 295   u32 index;
 296
 297   index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
 298   nm->neighbor_delete_rotor = index;
 299
 300   /* Try again from elt 0, could happen if an intfc goes down */
 301   if (index == ~0)
 302     {
 303       index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
 304       nm->neighbor_delete_rotor = index;
 305     }
 306
 307   /* Nothing left in the pool */
 308   if (index == ~0)
 309     return;
 310
 311   e = pool_elt_at_index (nm->neighbor_pool, index);
 312
 313   vnet_unset_ip6_ethernet_neighbor (vm, e->key.sw_if_index,
 314                                     &e->key.ip6_address,
 315                                     e->link_layer_address,
 316                                     ETHER_MAC_ADDR_LEN);
 317 }
 318
 319 typedef struct
 320 {
 321   u8 is_add;
 322   u8 is_static;
 323   u8 is_no_fib_entry;
 324   u8 link_layer_address[6];
 325   u32 sw_if_index;
 326   ip6_address_t addr;
 327 } ip6_neighbor_set_unset_rpc_args_t;
 328
 329 static void ip6_neighbor_set_unset_rpc_callback
 330   (ip6_neighbor_set_unset_rpc_args_t * a);
 331
 332 static void set_unset_ip6_neighbor_rpc
 333   (vlib_main_t * vm,
 334    u32 sw_if_index,
 335    ip6_address_t * a, u8 * link_layer_address, int is_add, int is_static,
 336    int is_no_fib_entry)
 337 {
 338   ip6_neighbor_set_unset_rpc_args_t args;
 339   void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
 340
 341   args.sw_if_index = sw_if_index;
 342   args.is_add = is_add;
 343   args.is_static = is_static;
 344   args.is_no_fib_entry = is_no_fib_entry;
 345   clib_memcpy (&args.addr, a, sizeof (*a));
 346   if (NULL != link_layer_address)
 347     clib_memcpy (args.link_layer_address, link_layer_address, 6);
 348
 349   vl_api_rpc_call_main_thread (ip6_neighbor_set_unset_rpc_callback,
 350                                (u8 *) & args, sizeof (args));
 351 }
 352
 353 static void
 354 ip6_nbr_probe (ip_adjacency_t * adj)
 355 {
 356   icmp6_neighbor_solicitation_header_t *h;
 357   vnet_main_t *vnm = vnet_get_main ();
 358   ip6_main_t *im = &ip6_main;
 359   ip_interface_address_t *ia;
 360   ip6_address_t *dst, *src;
 361   vnet_hw_interface_t *hi;
 362   vnet_sw_interface_t *si;
 363   vlib_buffer_t *b;
 364   int bogus_length;
 365   vlib_main_t *vm;
 366   u32 bi = 0;
 367
 368   vm = vlib_get_main ();
 369
 370   si = vnet_get_sw_interface (vnm, adj->rewrite_header.sw_if_index);
 371   dst = &adj->sub_type.nbr.next_hop.ip6;
 372
 373   if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
 374     {
 375       return;
 376     }
 377   src = ip6_interface_address_matching_destination (im, dst,
 378                                                     adj->rewrite_header.
 379                                                     sw_if_index, &ia);
 380   if (!src)
 381     {
 382       return;
 383     }
 384
 385   h = vlib_packet_template_get_packet (vm,
 386                                        &im->discover_neighbor_packet_template,
 387                                        &bi);
 388
 389   hi = vnet_get_sup_hw_interface (vnm, adj->rewrite_header.sw_if_index);
 390
 391   h->ip.dst_address.as_u8[13] = dst->as_u8[13];
 392   h->ip.dst_address.as_u8[14] = dst->as_u8[14];
 393   h->ip.dst_address.as_u8[15] = dst->as_u8[15];
 394   h->ip.src_address = src[0];
 395   h->neighbor.target_address = dst[0];
 396
 397   clib_memcpy (h->link_layer_option.ethernet_address,
 398                hi->hw_address, vec_len (hi->hw_address));
 399
 400   h->neighbor.icmp.checksum =
 401     ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
 402   ASSERT (bogus_length == 0);
 403
 404   b = vlib_get_buffer (vm, bi);
 405   vnet_buffer (b)->sw_if_index[VLIB_RX] =
 406     vnet_buffer (b)->sw_if_index[VLIB_TX] = adj->rewrite_header.sw_if_index;
 407
 408   /* Add encapsulation string for software interface (e.g. ethernet header). */
 409   vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
 410   vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
 411
 412   {
 413     vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
 414     u32 *to_next = vlib_frame_vector_args (f);
 415     to_next[0] = bi;
 416     f->n_vectors = 1;
 417     vlib_put_frame_to_node (vm, hi->output_node_index, f);
 418   }
 419 }
 420
 421 static void
 422 ip6_nd_mk_complete (adj_index_t ai, ip6_neighbor_t * nbr)
 423 {
 424   adj_nbr_update_rewrite (ai, ADJ_NBR_REWRITE_FLAG_COMPLETE,
 425                           ethernet_build_rewrite (vnet_get_main (),
 426                                                   nbr->key.sw_if_index,
 427                                                   adj_get_link_type (ai),
 428                                                   nbr->link_layer_address));
 429 }
 430
 431 static void
 432 ip6_nd_mk_incomplete (adj_index_t ai)
 433 {
 434   ip_adjacency_t *adj = adj_get (ai);
 435
 436   adj_nbr_update_rewrite (ai,
 437                           ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
 438                           ethernet_build_rewrite (vnet_get_main (),
 439                                                   adj->rewrite_header.
 440                                                   sw_if_index,
 441                                                   adj_get_link_type (ai),
 442                                                   VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
 443 }
 444
 445 #define IP6_NBR_MK_KEY(k, sw_if_index, addr) \
 446 {                                            \
 447     k.sw_if_index = sw_if_index;             \
 448     k.ip6_address = *addr;                   \
 449     k.pad = 0;                               \
 450 }
 451
 452 static ip6_neighbor_t *
 453 ip6_nd_find (u32 sw_if_index, const ip6_address_t * addr)
 454 {
 455   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
 456   ip6_neighbor_t *n = NULL;
 457   ip6_neighbor_key_t k;
 458   uword *p;
 459
 460   IP6_NBR_MK_KEY (k, sw_if_index, addr);
 461
 462   p = mhash_get (&nm->neighbor_index_by_key, &k);
 463   if (p)
 464     {
 465       n = pool_elt_at_index (nm->neighbor_pool, p[0]);
 466     }
 467
 468   return (n);
 469 }
 470
 471 static adj_walk_rc_t
 472 ip6_nd_mk_complete_walk (adj_index_t ai, void *ctx)
 473 {
 474   ip6_neighbor_t *nbr = ctx;
 475
 476   ip6_nd_mk_complete (ai, nbr);
 477
 478   return (ADJ_WALK_RC_CONTINUE);
 479 }
 480
 481 static adj_walk_rc_t
 482 ip6_nd_mk_incomplete_walk (adj_index_t ai, void *ctx)
 483 {
 484   ip6_nd_mk_incomplete (ai);
 485
 486   return (ADJ_WALK_RC_CONTINUE);
 487 }
 488
 489 void
 490 ip6_ethernet_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
 491 {
 492   ip6_neighbor_t *nbr;
 493   ip_adjacency_t *adj;
 494
 495   adj = adj_get (ai);
 496
 497   nbr = ip6_nd_find (sw_if_index, &adj->sub_type.nbr.next_hop.ip6);
 498
 499   switch (adj->lookup_next_index)
 500     {
 501     case IP_LOOKUP_NEXT_ARP:
 502     case IP_LOOKUP_NEXT_GLEAN:
 503       if (NULL != nbr)
 504         {
 505           adj_nbr_walk_nh6 (sw_if_index, &nbr->key.ip6_address,
 506                             ip6_nd_mk_complete_walk, nbr);
 507         }
 508       else
 509         {
 510           /*
 511            * no matching ND entry.
 512            * construct the rewrite required to for an ND packet, and stick
 513            * that in the adj's pipe to smoke.
 514            */
 515           adj_nbr_update_rewrite (ai,
 516                                   ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
 517                                   ethernet_build_rewrite (vnm,
 518                                                           sw_if_index,
 519                                                           VNET_LINK_IP6,
 520                                                           VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
 521
 522           /*
 523            * since the FIB has added this adj for a route, it makes sense it may
 524            * want to forward traffic sometime soon. Let's send a speculative ND.
 525            * just one. If we were to do periodically that wouldn't be bad either,
 526            * but that's more code than i'm prepared to write at this time for
 527            * relatively little reward.
 528            */
 529           ip6_nbr_probe (adj);
 530         }
 531       break;
 532     case IP_LOOKUP_NEXT_MCAST:
 533       {
 534         /*
 535          * Construct a partial rewrite from the known ethernet mcast dest MAC
 536          */
 537         u8 *rewrite;
 538         u8 offset;
 539
 540         rewrite = ethernet_build_rewrite (vnm,
 541                                           sw_if_index,
 542                                           adj->ia_link,
 543                                           ethernet_ip6_mcast_dst_addr ());
 544
 545         /*
 546          * Complete the remaining fields of the adj's rewrite to direct the
 547          * complete of the rewrite at switch time by copying in the IP
 548          * dst address's bytes.
 549          * Ofset is 2 bytes into the desintation address. And we write 4 bytes.
 550          */
 551         offset = vec_len (rewrite) - 2;
 552         adj_mcast_update_rewrite (ai, rewrite, offset, 0xffffffff);
 553
 554         break;
 555       }
 556     case IP_LOOKUP_NEXT_DROP:
 557     case IP_LOOKUP_NEXT_PUNT:
 558     case IP_LOOKUP_NEXT_LOCAL:
 559     case IP_LOOKUP_NEXT_REWRITE:
 560     case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
 561     case IP_LOOKUP_NEXT_MIDCHAIN:
 562     case IP_LOOKUP_NEXT_ICMP_ERROR:
 563     case IP_LOOKUP_N_NEXT:
 564       ASSERT (0);
 565       break;
 566     }
 567 }
 568
 569 int
 570 vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
 571                                 u32 sw_if_index,
 572                                 ip6_address_t * a,
 573                                 u8 * link_layer_address,
 574                                 uword n_bytes_link_layer_address,
 575                                 int is_static, int is_no_fib_entry)
 576 {
 577   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
 578   ip6_neighbor_key_t k;
 579   ip6_neighbor_t *n = 0;
 580   int make_new_nd_cache_entry = 1;
 581   uword *p;
 582   u32 next_index;
 583   pending_resolution_t *pr, *mc;
 584
 585   if (vlib_get_thread_index ())
 586     {
 587       set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
 588                                   1 /* set new neighbor */ , is_static,
 589                                   is_no_fib_entry);
 590       return 0;
 591     }
 592
 593   k.sw_if_index = sw_if_index;
 594   k.ip6_address = a[0];
 595   k.pad = 0;
 596
 597   p = mhash_get (&nm->neighbor_index_by_key, &k);
 598   if (p)
 599     {
 600       n = pool_elt_at_index (nm->neighbor_pool, p[0]);
 601       /* Refuse to over-write static neighbor entry. */
 602       if (!is_static && (n->flags & IP6_NEIGHBOR_FLAG_STATIC))
 603         return -2;
 604       make_new_nd_cache_entry = 0;
 605     }
 606
 607   if (make_new_nd_cache_entry)
 608     {
 609       pool_get (nm->neighbor_pool, n);
 610       mhash_set (&nm->neighbor_index_by_key, &k, n - nm->neighbor_pool,
 611                  /* old value */ 0);
 612       n->key = k;
 613
 614       clib_memcpy (n->link_layer_address,
 615                    link_layer_address, n_bytes_link_layer_address);
 616
 617       /*
 618        * create the adj-fib. the entry in the FIB table for and to the peer.
 619        */
 620       if (!is_no_fib_entry)
 621         {
 622           fib_prefix_t pfx = {
 623             .fp_len = 128,
 624             .fp_proto = FIB_PROTOCOL_IP6,
 625             .fp_addr.ip6 = k.ip6_address,
 626           };
 627           u32 fib_index;
 628
 629           fib_index = ip6_main.fib_index_by_sw_if_index[n->key.sw_if_index];
 630           n->fib_entry_index =
 631             fib_table_entry_update_one_path (fib_index, &pfx,
 632                                              FIB_SOURCE_ADJ,
 633                                              FIB_ENTRY_FLAG_NONE,
 634                                              FIB_PROTOCOL_IP6, &pfx.fp_addr,
 635                                              n->key.sw_if_index, ~0, 1, NULL,
 636                                              FIB_ROUTE_PATH_FLAG_NONE);
 637         }
 638       else
 639         {
 640           n->flags |= IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY;
 641         }
 642     }
 643   else
 644     {
 645       /*
 646        * prevent a DoS attack from the data-plane that
 647        * spams us with no-op updates to the MAC address
 648        */
 649       if (0 == memcmp (n->link_layer_address,
 650                        link_layer_address, n_bytes_link_layer_address))
 651         return -1;
 652
 653       clib_memcpy (n->link_layer_address,
 654                    link_layer_address, n_bytes_link_layer_address);
 655     }
 656
 657   /* Update time stamp and flags. */
 658   n->cpu_time_last_updated = clib_cpu_time_now ();
 659   if (is_static)
 660     n->flags |= IP6_NEIGHBOR_FLAG_STATIC;
 661   else
 662     n->flags |= IP6_NEIGHBOR_FLAG_DYNAMIC;
 663
 664   adj_nbr_walk_nh6 (sw_if_index,
 665                     &n->key.ip6_address, ip6_nd_mk_complete_walk, n);
 666
 667   /* Customer(s) waiting for this address to be resolved? */
 668   p = mhash_get (&nm->pending_resolutions_by_address, a);
 669   if (p)
 670     {
 671       next_index = p[0];
 672
 673       while (next_index != (u32) ~ 0)
 674         {
 675           pr = pool_elt_at_index (nm->pending_resolutions, next_index);
 676           vlib_process_signal_event (vm, pr->node_index,
 677                                      pr->type_opaque, pr->data);
 678           next_index = pr->next_index;
 679           pool_put (nm->pending_resolutions, pr);
 680         }
 681
 682       mhash_unset (&nm->pending_resolutions_by_address, a, 0);
 683     }
 684
 685   /* Customer(s) requesting ND event for this address? */
 686   p = mhash_get (&nm->mac_changes_by_address, a);
 687   if (p)
 688     {
 689       next_index = p[0];
 690
 691       while (next_index != (u32) ~ 0)
 692         {
 693           int (*fp) (u32, u8 *, u32, ip6_address_t *);
 694           int rv = 1;
 695           mc = pool_elt_at_index (nm->mac_changes, next_index);
 696           fp = mc->data_callback;
 697
 698           /* Call the user's data callback, return 1 to suppress dup events */
 699           if (fp)
 700             rv =
 701               (*fp) (mc->data, link_layer_address, sw_if_index, &ip6a_zero);
 702           /*
 703            * Signal the resolver process, as long as the user
 704            * says they want to be notified
 705            */
 706           if (rv == 0)
 707             vlib_process_signal_event (vm, mc->node_index,
 708                                        mc->type_opaque, mc->data);
 709           next_index = mc->next_index;
 710         }
 711     }
 712
 713   return 0;
 714 }
 715
 716 int
 717 vnet_unset_ip6_ethernet_neighbor (vlib_main_t * vm,
 718                                   u32 sw_if_index,
 719                                   ip6_address_t * a,
 720                                   u8 * link_layer_address,
 721                                   uword n_bytes_link_layer_address)
 722 {
 723   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
 724   ip6_neighbor_key_t k;
 725   ip6_neighbor_t *n;
 726   uword *p;
 727   int rv = 0;
 728
 729   if (vlib_get_thread_index ())
 730     {
 731       set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
 732                                   0 /* unset */ , 0, 0);
 733       return 0;
 734     }
 735
 736   k.sw_if_index = sw_if_index;
 737   k.ip6_address = a[0];
 738   k.pad = 0;
 739
 740   p = mhash_get (&nm->neighbor_index_by_key, &k);
 741   if (p == 0)
 742     {
 743       rv = -1;
 744       goto out;
 745     }
 746
 747   n = pool_elt_at_index (nm->neighbor_pool, p[0]);
 748   mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
 749
 750   adj_nbr_walk_nh6 (sw_if_index,
 751                     &n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL);
 752
 753   fib_table_entry_delete_index (n->fib_entry_index, FIB_SOURCE_ADJ);
 754   pool_put (nm->neighbor_pool, n);
 755
 756 out:
 757   return rv;
 758 }
 759
 760 static void ip6_neighbor_set_unset_rpc_callback
 761   (ip6_neighbor_set_unset_rpc_args_t * a)
 762 {
 763   vlib_main_t *vm = vlib_get_main ();
 764   if (a->is_add)
 765     vnet_set_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
 766                                     a->link_layer_address, 6, a->is_static,
 767                                     a->is_no_fib_entry);
 768   else
 769     vnet_unset_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
 770                                       a->link_layer_address, 6);
 771 }
 772
 773 static int
 774 ip6_neighbor_sort (void *a1, void *a2)
 775 {
 776   vnet_main_t *vnm = vnet_get_main ();
 777   ip6_neighbor_t *n1 = a1, *n2 = a2;
 778   int cmp;
 779   cmp = vnet_sw_interface_compare (vnm, n1->key.sw_if_index,
 780                                    n2->key.sw_if_index);
 781   if (!cmp)
 782     cmp = ip6_address_compare (&n1->key.ip6_address, &n2->key.ip6_address);
 783   return cmp;
 784 }
 785
 786 ip6_neighbor_t *
 787 ip6_neighbors_entries (u32 sw_if_index)
 788 {
 789   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
 790   ip6_neighbor_t *n, *ns = 0;
 791
 792   /* *INDENT-OFF* */
 793   pool_foreach (n, nm->neighbor_pool,
 794   ({
 795     if (sw_if_index != ~0 && n->key.sw_if_index != sw_if_index)
 796       continue;
 797     vec_add1 (ns, n[0]);
 798   }));
 799   /* *INDENT-ON* */
 800
 801   if (ns)
 802     vec_sort_with_function (ns, ip6_neighbor_sort);
 803   return ns;
 804 }
 805
 806 static clib_error_t *
 807 show_ip6_neighbors (vlib_main_t * vm,
 808                     unformat_input_t * input, vlib_cli_command_t * cmd)
 809 {
 810   vnet_main_t *vnm = vnet_get_main ();
 811   ip6_neighbor_t *n, *ns;
 812   clib_error_t *error = 0;
 813   u32 sw_if_index;
 814
 815   /* Filter entries by interface if given. */
 816   sw_if_index = ~0;
 817   (void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index);
 818
 819   ns = ip6_neighbors_entries (sw_if_index);
 820   if (ns)
 821     {
 822       vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, 0);
 823       vec_foreach (n, ns)
 824       {
 825         vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, n);
 826       }
 827       vec_free (ns);
 828     }
 829
 830   return error;
 831 }
 832
 833 /*?
 834  * This command is used to display the adjacent IPv6 hosts found via
 835  * neighbor discovery. Optionally, limit the output to the specified
 836  * interface.
 837  *
 838  * @cliexpar
 839  * Example of how to display the IPv6 neighbor adjacency table:
 840  * @cliexstart{show ip6 neighbors}
 841  *     Time           Address       Flags     Link layer                     Interface
 842  *      34.0910     ::a:1:1:0:7            02:fe:6a:07:39:6f                GigabitEthernet2/0/0
 843  *     173.2916     ::b:5:1:c:2            02:fe:50:62:3a:94                GigabitEthernet2/0/0
 844  *     886.6654     ::1:1:c:0:9       S    02:fe:e4:45:27:5b                GigabitEthernet3/0/0
 845  * @cliexend
 846  * Example of how to display the IPv6 neighbor adjacency table for given interface:
 847  * @cliexstart{show ip6 neighbors GigabitEthernet2/0/0}
 848  *     Time           Address       Flags     Link layer                     Interface
 849  *      34.0910     ::a:1:1:0:7            02:fe:6a:07:39:6f                GigabitEthernet2/0/0
 850  *     173.2916     ::b:5:1:c:2            02:fe:50:62:3a:94                GigabitEthernet2/0/0
 851  * @cliexend
 852 ?*/
 853 /* *INDENT-OFF* */
 854 VLIB_CLI_COMMAND (show_ip6_neighbors_command, static) = {
 855   .path = "show ip6 neighbors",
 856   .function = show_ip6_neighbors,
 857   .short_help = "show ip6 neighbors [<interface>]",
 858 };
 859 /* *INDENT-ON* */
 860
 861 static clib_error_t *
 862 set_ip6_neighbor (vlib_main_t * vm,
 863                   unformat_input_t * input, vlib_cli_command_t * cmd)
 864 {
 865   vnet_main_t *vnm = vnet_get_main ();
 866   ip6_address_t addr;
 867   u8 mac_address[6];
 868   int addr_valid = 0;
 869   int is_del = 0;
 870   int is_static = 0;
 871   int is_no_fib_entry = 0;
 872   u32 sw_if_index;
 873
 874   while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
 875     {
 876       /* intfc, ip6-address, mac-address */
 877       if (unformat (input, "%U %U %U",
 878                     unformat_vnet_sw_interface, vnm, &sw_if_index,
 879                     unformat_ip6_address, &addr,
 880                     unformat_ethernet_address, mac_address))
 881         addr_valid = 1;
 882
 883       else if (unformat (input, "delete") || unformat (input, "del"))
 884         is_del = 1;
 885       else if (unformat (input, "static"))
 886         is_static = 1;
 887       else if (unformat (input, "no-fib-entry"))
 888         is_no_fib_entry = 1;
 889       else
 890         break;
 891     }
 892
 893   if (!addr_valid)
 894     return clib_error_return (0, "Missing interface, ip6 or hw address");
 895
 896   if (!is_del)
 897     vnet_set_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
 898                                     mac_address, sizeof (mac_address),
 899                                     is_static, is_no_fib_entry);
 900   else
 901     vnet_unset_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
 902                                       mac_address, sizeof (mac_address));
 903   return 0;
 904 }
 905
 906 /*?
 907  * This command is used to manually add an entry to the IPv6 neighbor
 908  * adjacency table. Optionally, the entry can be added as static. It is
 909  * also used to remove an entry from the table. Use the '<em>show ip6
 910  * neighbors</em>' command to display all learned and manually entered entries.
 911  *
 912  * @cliexpar
 913  * Example of how to add a static entry to the IPv6 neighbor adjacency table:
 914  * @cliexcmd{set ip6 neighbor GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b static}
 915  * Example of how to delete an entry from the IPv6 neighbor adjacency table:
 916  * @cliexcmd{set ip6 neighbor del GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b}
 917 ?*/
 918 /* *INDENT-OFF* */
 919 VLIB_CLI_COMMAND (set_ip6_neighbor_command, static) =
 920 {
 921   .path = "set ip6 neighbor",
 922   .function = set_ip6_neighbor,
 923   .short_help = "set ip6 neighbor [del] <interface> <ip6-address> <mac-address> [static]",
 924 };
 925 /* *INDENT-ON* */
 926
 927 typedef enum
 928 {
 929   ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP,
 930   ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY,
 931   ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
 932 } icmp6_neighbor_solicitation_or_advertisement_next_t;
 933
 934 static_always_inline uword
 935 icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
 936                                               vlib_node_runtime_t * node,
 937                                               vlib_frame_t * frame,
 938                                               uword is_solicitation)
 939 {
 940   vnet_main_t *vnm = vnet_get_main ();
 941   ip6_main_t *im = &ip6_main;
 942   uword n_packets = frame->n_vectors;
 943   u32 *from, *to_next;
 944   u32 n_left_from, n_left_to_next, next_index, n_advertisements_sent;
 945   icmp6_neighbor_discovery_option_type_t option_type;
 946   vlib_node_runtime_t *error_node =
 947     vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
 948   int bogus_length;
 949
 950   from = vlib_frame_vector_args (frame);
 951   n_left_from = n_packets;
 952   next_index = node->cached_next_index;
 953
 954   if (node->flags & VLIB_NODE_FLAG_TRACE)
 955     vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
 956                                    /* stride */ 1,
 957                                    sizeof (icmp6_input_trace_t));
 958
 959   option_type =
 960     (is_solicitation
 961      ? ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address
 962      : ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address);
 963   n_advertisements_sent = 0;
 964
 965   while (n_left_from > 0)
 966     {
 967       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
 968
 969       while (n_left_from > 0 && n_left_to_next > 0)
 970         {
 971           vlib_buffer_t *p0;
 972           ip6_header_t *ip0;
 973           icmp6_neighbor_solicitation_or_advertisement_header_t *h0;
 974           icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
 975           u32 bi0, options_len0, sw_if_index0, next0, error0;
 976           u32 ip6_sadd_link_local, ip6_sadd_unspecified;
 977           int is_rewrite0;
 978           u32 ni0;
 979
 980           bi0 = to_next[0] = from[0];
 981
 982           from += 1;
 983           to_next += 1;
 984           n_left_from -= 1;
 985           n_left_to_next -= 1;
 986
 987           p0 = vlib_get_buffer (vm, bi0);
 988           ip0 = vlib_buffer_get_current (p0);
 989           h0 = ip6_next_header (ip0);
 990           options_len0 =
 991             clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
 992
 993           error0 = ICMP6_ERROR_NONE;
 994           sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
 995           ip6_sadd_link_local =
 996             ip6_address_is_link_local_unicast (&ip0->src_address);
 997           ip6_sadd_unspecified =
 998             ip6_address_is_unspecified (&ip0->src_address);
 999
1000           /* Check that source address is unspecified, link-local or else on-link. */
1001           if (!ip6_sadd_unspecified && !ip6_sadd_link_local)
1002             {
1003               u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1004
1005               if (ADJ_INDEX_INVALID != src_adj_index0)
1006                 {
1007                   ip_adjacency_t *adj0 = adj_get (src_adj_index0);
1008
1009                   /* Allow all realistic-looking rewrite adjacencies to pass */
1010                   ni0 = adj0->lookup_next_index;
1011                   is_rewrite0 = (ni0 >= IP_LOOKUP_NEXT_ARP) &&
1012                     (ni0 < IP6_LOOKUP_N_NEXT);
1013
1014                   error0 = ((adj0->rewrite_header.sw_if_index != sw_if_index0
1015                              || !is_rewrite0)
1016                             ?
1017                             ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK
1018                             : error0);
1019                 }
1020               else
1021                 {
1022                   error0 =
1023                     ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK;
1024                 }
1025             }
1026
1027           o0 = (void *) (h0 + 1);
1028           o0 = ((options_len0 == 8 && o0->header.type == option_type
1029                  && o0->header.n_data_u64s == 1) ? o0 : 0);
1030
1031           /* If src address unspecified or link local, donot learn neighbor MAC */
1032           if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1033                             !ip6_sadd_unspecified))
1034             {
1035               ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1036               if (nm->limit_neighbor_cache_size &&
1037                   pool_elts (nm->neighbor_pool) >=
1038                   nm->limit_neighbor_cache_size)
1039                 unset_random_neighbor_entry ();
1040               vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1041                                               is_solicitation ?
1042                                               &ip0->src_address :
1043                                               &h0->target_address,
1044                                               o0->ethernet_address,
1045                                               sizeof (o0->ethernet_address),
1046                                               0, ip6_sadd_link_local);
1047             }
1048
1049           if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1050             {
1051               /* Check that target address is local to this router. */
1052               fib_node_index_t fei;
1053               u32 fib_index;
1054
1055               fib_index =
1056                 ip6_fib_table_get_index_for_sw_if_index (sw_if_index0);
1057
1058               if (~0 == fib_index)
1059                 {
1060                   error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1061                 }
1062               else
1063                 {
1064                   fei = ip6_fib_table_lookup_exact_match (fib_index,
1065                                                           &h0->target_address,
1066                                                           128);
1067
1068                   if (FIB_NODE_INDEX_INVALID == fei)
1069                     {
1070                       /* The target address is not in the FIB */
1071                       error0 =
1072                         ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1073                     }
1074                   else
1075                     {
1076                       if (FIB_ENTRY_FLAG_LOCAL &
1077                           fib_entry_get_flags_for_source (fei,
1078                                                           FIB_SOURCE_INTERFACE))
1079                         {
1080                           /* It's an address that belongs to one of our interfaces
1081                            * that's good. */
1082                         }
1083                       else
1084                         if (fib_entry_is_sourced
1085                             (fei, FIB_SOURCE_IP6_ND_PROXY))
1086                         {
1087                           /* The address was added by IPv6 Proxy ND config.
1088                            * We should only respond to these if the NS arrived on
1089                            * the link that has a matching covering prefix */
1090                         }
1091                       else
1092                         {
1093                           error0 =
1094                             ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1095                         }
1096                     }
1097                 }
1098             }
1099
1100           if (is_solicitation)
1101             next0 = (error0 != ICMP6_ERROR_NONE
1102                      ? ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP
1103                      : ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY);
1104           else
1105             {
1106               next0 = 0;
1107               error0 = error0 == ICMP6_ERROR_NONE ?
1108                 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_RX : error0;
1109             }
1110
1111           if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1112             {
1113               vnet_sw_interface_t *sw_if0;
1114               ethernet_interface_t *eth_if0;
1115               ethernet_header_t *eth0;
1116
1117               /* dst address is either source address or the all-nodes mcast addr */
1118               if (!ip6_sadd_unspecified)
1119                 ip0->dst_address = ip0->src_address;
1120               else
1121                 ip6_set_reserved_multicast_address (&ip0->dst_address,
1122                                                     IP6_MULTICAST_SCOPE_link_local,
1123                                                     IP6_MULTICAST_GROUP_ID_all_hosts);
1124
1125               ip0->src_address = h0->target_address;
1126               ip0->hop_limit = 255;
1127               h0->icmp.type = ICMP6_neighbor_advertisement;
1128
1129               sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1130               ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1131               eth_if0 =
1132                 ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
1133               if (eth_if0 && o0)
1134                 {
1135                   clib_memcpy (o0->ethernet_address, eth_if0->address, 6);
1136                   o0->header.type =
1137                     ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
1138                 }
1139
1140               h0->advertisement_flags = clib_host_to_net_u32
1141                 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED
1142                  | ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
1143
1144               h0->icmp.checksum = 0;
1145               h0->icmp.checksum =
1146                 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1147                                                    &bogus_length);
1148               ASSERT (bogus_length == 0);
1149
1150               /* Reuse current MAC header, copy SMAC to DMAC and
1151                * interface MAC to SMAC */
1152               vlib_buffer_advance (p0, -ethernet_buffer_header_size (p0));
1153               eth0 = vlib_buffer_get_current (p0);
1154               clib_memcpy (eth0->dst_address, eth0->src_address, 6);
1155               if (eth_if0)
1156                 clib_memcpy (eth0->src_address, eth_if0->address, 6);
1157
1158               /* Setup input and output sw_if_index for packet */
1159               ASSERT (vnet_buffer (p0)->sw_if_index[VLIB_RX] == sw_if_index0);
1160               vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1161               vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1162                 vnet_main.local_interface_sw_if_index;
1163
1164               n_advertisements_sent++;
1165             }
1166
1167           p0->error = error_node->errors[error0];
1168
1169           vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1170                                            to_next, n_left_to_next,
1171                                            bi0, next0);
1172         }
1173
1174       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1175     }
1176
1177   /* Account for advertisements sent. */
1178   vlib_error_count (vm, error_node->node_index,
1179                     ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX,
1180                     n_advertisements_sent);
1181
1182   return frame->n_vectors;
1183 }
1184
1185 /* for "syslogging" - use elog for now */
1186 #define foreach_log_level            \
1187   _ (DEBUG, "DEBUG")                         \
1188   _ (INFO, "INFORMATION")            \
1189   _ (NOTICE, "NOTICE")               \
1190   _ (WARNING, "WARNING")             \
1191   _ (ERR, "ERROR")                                    \
1192   _ (CRIT, "CRITICAL")                        \
1193   _ (ALERT, "ALERT")                          \
1194   _ (EMERG,  "EMERGENCY")
1195
1196 typedef enum
1197 {
1198 #define _(f,s) LOG_##f,
1199   foreach_log_level
1200 #undef _
1201 } log_level_t;
1202
1203 static char *log_level_strings[] = {
1204 #define _(f,s) s,
1205   foreach_log_level
1206 #undef _
1207 };
1208
1209 static int logmask = 1 << LOG_DEBUG;
1210
1211 static void
1212 ip6_neighbor_syslog (vlib_main_t * vm, int priority, char *fmt, ...)
1213 {
1214   /* just use elog for now */
1215   u8 *what;
1216   va_list va;
1217
1218   if ((priority > LOG_EMERG) || !(logmask & (1 << priority)))
1219     return;
1220
1221   va_start (va, fmt);
1222   if (fmt)
1223     {
1224       what = va_format (0, fmt, &va);
1225
1226       ELOG_TYPE_DECLARE (e) =
1227       {
1228       .format = "ip6 nd:  (%s): %s",.format_args = "T4T4",};
1229       struct
1230       {
1231         u32 s[2];
1232       } *ed;
1233       ed = ELOG_DATA (&vm->elog_main, e);
1234       ed->s[0] = elog_string (&vm->elog_main, log_level_strings[priority]);
1235       ed->s[1] = elog_string (&vm->elog_main, (char *) what);
1236     }
1237   va_end (va);
1238   return;
1239 }
1240
1241 /* ipv6 neighbor discovery - router advertisements */
1242 typedef enum
1243 {
1244   ICMP6_ROUTER_SOLICITATION_NEXT_DROP,
1245   ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW,
1246   ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX,
1247   ICMP6_ROUTER_SOLICITATION_N_NEXT,
1248 } icmp6_router_solicitation_or_advertisement_next_t;
1249
1250 static_always_inline uword
1251 icmp6_router_solicitation (vlib_main_t * vm,
1252                            vlib_node_runtime_t * node, vlib_frame_t * frame)
1253 {
1254   vnet_main_t *vnm = vnet_get_main ();
1255   ip6_main_t *im = &ip6_main;
1256   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1257   uword n_packets = frame->n_vectors;
1258   u32 *from, *to_next;
1259   u32 n_left_from, n_left_to_next, next_index;
1260   u32 n_advertisements_sent = 0;
1261   int bogus_length;
1262
1263   icmp6_neighbor_discovery_option_type_t option_type;
1264
1265   vlib_node_runtime_t *error_node =
1266     vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1267
1268   from = vlib_frame_vector_args (frame);
1269   n_left_from = n_packets;
1270   next_index = node->cached_next_index;
1271
1272   if (node->flags & VLIB_NODE_FLAG_TRACE)
1273     vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1274                                    /* stride */ 1,
1275                                    sizeof (icmp6_input_trace_t));
1276
1277   /* source may append his LL address */
1278   option_type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1279
1280   while (n_left_from > 0)
1281     {
1282       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1283
1284       while (n_left_from > 0 && n_left_to_next > 0)
1285         {
1286           vlib_buffer_t *p0;
1287           ip6_header_t *ip0;
1288           ip6_radv_t *radv_info = 0;
1289
1290           icmp6_neighbor_discovery_header_t *h0;
1291           icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1292
1293           u32 bi0, options_len0, sw_if_index0, next0, error0;
1294           u32 is_solicitation = 1, is_dropped = 0;
1295           u32 is_unspecified, is_link_local;
1296
1297           bi0 = to_next[0] = from[0];
1298
1299           from += 1;
1300           to_next += 1;
1301           n_left_from -= 1;
1302           n_left_to_next -= 1;
1303
1304           p0 = vlib_get_buffer (vm, bi0);
1305           ip0 = vlib_buffer_get_current (p0);
1306           h0 = ip6_next_header (ip0);
1307           options_len0 =
1308             clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1309           is_unspecified = ip6_address_is_unspecified (&ip0->src_address);
1310           is_link_local =
1311             ip6_address_is_link_local_unicast (&ip0->src_address);
1312
1313           error0 = ICMP6_ERROR_NONE;
1314           sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1315
1316           /* check if solicitation  (not from nd_timer node) */
1317           if (ip6_address_is_unspecified (&ip0->dst_address))
1318             is_solicitation = 0;
1319
1320           /* Check that source address is unspecified, link-local or else on-link. */
1321           if (!is_unspecified && !is_link_local)
1322             {
1323               u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1324
1325               if (ADJ_INDEX_INVALID != src_adj_index0)
1326                 {
1327                   ip_adjacency_t *adj0 = adj_get (src_adj_index0);
1328
1329                   error0 = (adj0->rewrite_header.sw_if_index != sw_if_index0
1330                             ?
1331                             ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK
1332                             : error0);
1333                 }
1334               else
1335                 {
1336                   error0 = ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK;
1337                 }
1338             }
1339
1340           /* check for source LL option and process */
1341           o0 = (void *) (h0 + 1);
1342           o0 = ((options_len0 == 8
1343                  && o0->header.type == option_type
1344                  && o0->header.n_data_u64s == 1) ? o0 : 0);
1345
1346           /* if src address unspecified IGNORE any options */
1347           if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1348                             !is_unspecified && !is_link_local))
1349             {
1350               ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1351               if (nm->limit_neighbor_cache_size &&
1352                   pool_elts (nm->neighbor_pool) >=
1353                   nm->limit_neighbor_cache_size)
1354                 unset_random_neighbor_entry ();
1355
1356               vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1357                                               &ip0->src_address,
1358                                               o0->ethernet_address,
1359                                               sizeof (o0->ethernet_address),
1360                                               0, 0);
1361             }
1362
1363           /* default is to drop */
1364           next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1365
1366           if (error0 == ICMP6_ERROR_NONE)
1367             {
1368               vnet_sw_interface_t *sw_if0;
1369               ethernet_interface_t *eth_if0;
1370               u32 adj_index0;
1371
1372               sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1373               ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1374               eth_if0 =
1375                 ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
1376
1377               /* only support ethernet interface type for now */
1378               error0 =
1379                 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1380                 : error0;
1381
1382               if (error0 == ICMP6_ERROR_NONE)
1383                 {
1384                   u32 ri;
1385
1386                   /* adjust the sizeof the buffer to just include the ipv6 header */
1387                   p0->current_length -=
1388                     (options_len0 +
1389                      sizeof (icmp6_neighbor_discovery_header_t));
1390
1391                   /* look up the radv_t information for this interface */
1392                   vec_validate_init_empty
1393                     (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
1394
1395                   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1396
1397                   if (ri != ~0)
1398                     radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1399
1400                   error0 =
1401                     ((!radv_info) ?
1402                      ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1403                      error0);
1404
1405                   if (error0 == ICMP6_ERROR_NONE)
1406                     {
1407                       f64 now = vlib_time_now (vm);
1408
1409                       /* for solicited adverts - need to rate limit */
1410                       if (is_solicitation)
1411                         {
1412                           if (0 != radv_info->last_radv_time &&
1413                               (now - radv_info->last_radv_time) <
1414                               MIN_DELAY_BETWEEN_RAS)
1415                             is_dropped = 1;
1416                           else
1417                             radv_info->last_radv_time = now;
1418                         }
1419
1420                       /* send now  */
1421                       icmp6_router_advertisement_header_t rh;
1422
1423                       rh.icmp.type = ICMP6_router_advertisement;
1424                       rh.icmp.code = 0;
1425                       rh.icmp.checksum = 0;
1426
1427                       rh.current_hop_limit = radv_info->curr_hop_limit;
1428                       rh.router_lifetime_in_sec =
1429                         clib_host_to_net_u16
1430                         (radv_info->adv_router_lifetime_in_sec);
1431                       rh.
1432                         time_in_msec_between_retransmitted_neighbor_solicitations
1433                         =
1434                         clib_host_to_net_u32 (radv_info->
1435                                               adv_time_in_msec_between_retransmitted_neighbor_solicitations);
1436                       rh.neighbor_reachable_time_in_msec =
1437                         clib_host_to_net_u32 (radv_info->
1438                                               adv_neighbor_reachable_time_in_msec);
1439
1440                       rh.flags =
1441                         (radv_info->adv_managed_flag) ?
1442                         ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP :
1443                         0;
1444                       rh.flags |=
1445                         ((radv_info->adv_other_flag) ?
1446                          ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP :
1447                          0);
1448
1449
1450                       u16 payload_length =
1451                         sizeof (icmp6_router_advertisement_header_t);
1452
1453                       vlib_buffer_add_data (vm,
1454                                             p0->free_list_index,
1455                                             bi0,
1456                                             (void *) &rh,
1457                                             sizeof
1458                                             (icmp6_router_advertisement_header_t));
1459
1460                       if (radv_info->adv_link_layer_address)
1461                         {
1462                           icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
1463                             h;
1464
1465                           h.header.type =
1466                             ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1467                           h.header.n_data_u64s = 1;
1468
1469                           /* copy ll address */
1470                           clib_memcpy (&h.ethernet_address[0],
1471                                        eth_if0->address, 6);
1472
1473                           vlib_buffer_add_data (vm,
1474                                                 p0->free_list_index,
1475                                                 bi0,
1476                                                 (void *) &h,
1477                                                 sizeof
1478                                                 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t));
1479
1480                           payload_length +=
1481                             sizeof
1482                             (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t);
1483                         }
1484
1485                       /* add MTU option */
1486                       if (radv_info->adv_link_mtu)
1487                         {
1488                           icmp6_neighbor_discovery_mtu_option_t h;
1489
1490                           h.unused = 0;
1491                           h.mtu =
1492                             clib_host_to_net_u32 (radv_info->adv_link_mtu);
1493                           h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu;
1494                           h.header.n_data_u64s = 1;
1495
1496                           payload_length +=
1497                             sizeof (icmp6_neighbor_discovery_mtu_option_t);
1498
1499                           vlib_buffer_add_data (vm,
1500                                                 p0->free_list_index,
1501                                                 bi0,
1502                                                 (void *) &h,
1503                                                 sizeof
1504                                                 (icmp6_neighbor_discovery_mtu_option_t));
1505                         }
1506
1507                       /* add advertised prefix options  */
1508                       ip6_radv_prefix_t *pr_info;
1509
1510                       /* *INDENT-OFF* */
1511                       pool_foreach (pr_info, radv_info->adv_prefixes_pool,
1512                       ({
1513                         if(pr_info->enabled &&
1514                            (!pr_info->decrement_lifetime_flag
1515                             || (pr_info->pref_lifetime_expires >0)))
1516                           {
1517                             /* advertise this prefix */
1518                             icmp6_neighbor_discovery_prefix_information_option_t h;
1519
1520                             h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information;
1521                             h.header.n_data_u64s  =  (sizeof(icmp6_neighbor_discovery_prefix_information_option_t) >> 3);
1522
1523                             h.dst_address_length  = pr_info->prefix_len;
1524
1525                             h.flags  = (pr_info->adv_on_link_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_FLAG_ON_LINK : 0;
1526                             h.flags |= (pr_info->adv_autonomous_flag) ?  ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_AUTO :  0;
1527
1528                             if(radv_info->cease_radv && pr_info->deprecated_prefix_flag)
1529                               {
1530                                 h.valid_time = clib_host_to_net_u32(MIN_ADV_VALID_LIFETIME);
1531                                 h.preferred_time  = 0;
1532                               }
1533                             else
1534                               {
1535                                 if(pr_info->decrement_lifetime_flag)
1536                                   {
1537                                     pr_info->adv_valid_lifetime_in_secs = ((pr_info->valid_lifetime_expires  > now)) ?
1538                                       (pr_info->valid_lifetime_expires  - now) : 0;
1539
1540                                     pr_info->adv_pref_lifetime_in_secs = ((pr_info->pref_lifetime_expires  > now)) ?
1541                                       (pr_info->pref_lifetime_expires  - now) : 0;
1542                                   }
1543
1544                                 h.valid_time = clib_host_to_net_u32(pr_info->adv_valid_lifetime_in_secs);
1545                                 h.preferred_time  = clib_host_to_net_u32(pr_info->adv_pref_lifetime_in_secs) ;
1546                               }
1547                             h.unused  = 0;
1548
1549                             clib_memcpy(&h.dst_address, &pr_info->prefix,  sizeof(ip6_address_t));
1550
1551                             payload_length += sizeof( icmp6_neighbor_discovery_prefix_information_option_t);
1552
1553                             vlib_buffer_add_data (vm,
1554                                                   p0->free_list_index,
1555                                                   bi0,
1556                                                   (void *)&h, sizeof(icmp6_neighbor_discovery_prefix_information_option_t));
1557
1558                           }
1559                       }));
1560                       /* *INDENT-ON* */
1561
1562                       /* add additional options before here */
1563
1564                       /* finish building the router advertisement... */
1565                       if (!is_unspecified && radv_info->send_unicast)
1566                         {
1567                           ip0->dst_address = ip0->src_address;
1568                         }
1569                       else
1570                         {
1571                           /* target address is all-nodes mcast addr */
1572                           ip6_set_reserved_multicast_address
1573                             (&ip0->dst_address,
1574                              IP6_MULTICAST_SCOPE_link_local,
1575                              IP6_MULTICAST_GROUP_ID_all_hosts);
1576                         }
1577
1578                       /* source address MUST be the link-local address */
1579                       ip0->src_address = radv_info->link_local_address;
1580
1581                       ip0->hop_limit = 255;
1582                       ip0->payload_length =
1583                         clib_host_to_net_u16 (payload_length);
1584
1585                       icmp6_router_advertisement_header_t *rh0 =
1586                         (icmp6_router_advertisement_header_t *) (ip0 + 1);
1587                       rh0->icmp.checksum =
1588                         ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1589                                                            &bogus_length);
1590                       ASSERT (bogus_length == 0);
1591
1592                       /* setup output if and adjacency */
1593                       vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1594                         vnet_main.local_interface_sw_if_index;
1595
1596                       if (is_solicitation)
1597                         {
1598                           ethernet_header_t *eth0;
1599                           /* Reuse current MAC header, copy SMAC to DMAC and
1600                            * interface MAC to SMAC */
1601                           vlib_buffer_reset (p0);
1602                           eth0 = vlib_buffer_get_current (p0);
1603                           clib_memcpy (eth0->dst_address, eth0->src_address,
1604                                        6);
1605                           clib_memcpy (eth0->src_address, eth_if0->address,
1606                                        6);
1607                           next0 =
1608                             is_dropped ? next0 :
1609                             ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX;
1610                           vnet_buffer (p0)->sw_if_index[VLIB_TX] =
1611                             sw_if_index0;
1612                         }
1613                       else
1614                         {
1615                           adj_index0 = radv_info->mcast_adj_index;
1616                           if (adj_index0 == 0)
1617                             error0 = ICMP6_ERROR_DST_LOOKUP_MISS;
1618                           else
1619                             {
1620                               next0 =
1621                                 is_dropped ? next0 :
1622                                 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW;
1623                               vnet_buffer (p0)->ip.adj_index[VLIB_TX] =
1624                                 adj_index0;
1625                             }
1626                         }
1627                       p0->flags |= VNET_BUFFER_LOCALLY_ORIGINATED;
1628
1629                       radv_info->n_solicitations_dropped += is_dropped;
1630                       radv_info->n_solicitations_rcvd += is_solicitation;
1631
1632                       if ((error0 == ICMP6_ERROR_NONE) && !is_dropped)
1633                         {
1634                           radv_info->n_advertisements_sent++;
1635                           n_advertisements_sent++;
1636                         }
1637                     }
1638                 }
1639             }
1640
1641           p0->error = error_node->errors[error0];
1642
1643           if (error0 != ICMP6_ERROR_NONE)
1644             vlib_error_count (vm, error_node->node_index, error0, 1);
1645
1646           vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1647                                            to_next, n_left_to_next,
1648                                            bi0, next0);
1649
1650         }
1651
1652       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1653     }
1654
1655   /* Account for router advertisements sent. */
1656   vlib_error_count (vm, error_node->node_index,
1657                     ICMP6_ERROR_ROUTER_ADVERTISEMENTS_TX,
1658                     n_advertisements_sent);
1659
1660   return frame->n_vectors;
1661 }
1662
1663  /* validate advertised info for consistancy (see RFC-4861 section 6.2.7) - log any inconsistencies, packet will always  be dropped  */
1664 static_always_inline uword
1665 icmp6_router_advertisement (vlib_main_t * vm,
1666                             vlib_node_runtime_t * node, vlib_frame_t * frame)
1667 {
1668   vnet_main_t *vnm = vnet_get_main ();
1669   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1670   uword n_packets = frame->n_vectors;
1671   u32 *from, *to_next;
1672   u32 n_left_from, n_left_to_next, next_index;
1673   u32 n_advertisements_rcvd = 0;
1674
1675   vlib_node_runtime_t *error_node =
1676     vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1677
1678   from = vlib_frame_vector_args (frame);
1679   n_left_from = n_packets;
1680   next_index = node->cached_next_index;
1681
1682   if (node->flags & VLIB_NODE_FLAG_TRACE)
1683     vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1684                                    /* stride */ 1,
1685                                    sizeof (icmp6_input_trace_t));
1686
1687   while (n_left_from > 0)
1688     {
1689       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1690
1691       while (n_left_from > 0 && n_left_to_next > 0)
1692         {
1693           vlib_buffer_t *p0;
1694           ip6_header_t *ip0;
1695           ip6_radv_t *radv_info = 0;
1696           icmp6_router_advertisement_header_t *h0;
1697           u32 bi0, options_len0, sw_if_index0, next0, error0;
1698
1699           bi0 = to_next[0] = from[0];
1700
1701           from += 1;
1702           to_next += 1;
1703           n_left_from -= 1;
1704           n_left_to_next -= 1;
1705
1706           p0 = vlib_get_buffer (vm, bi0);
1707           ip0 = vlib_buffer_get_current (p0);
1708           h0 = ip6_next_header (ip0);
1709           options_len0 =
1710             clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1711
1712           error0 = ICMP6_ERROR_NONE;
1713           sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1714
1715           /* Check that source address is link-local */
1716           error0 = (!ip6_address_is_link_local_unicast (&ip0->src_address)) ?
1717             ICMP6_ERROR_ROUTER_ADVERTISEMENT_SOURCE_NOT_LINK_LOCAL : error0;
1718
1719           /* default is to drop */
1720           next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1721
1722           n_advertisements_rcvd++;
1723
1724           if (error0 == ICMP6_ERROR_NONE)
1725             {
1726               vnet_sw_interface_t *sw_if0;
1727               ethernet_interface_t *eth_if0;
1728
1729               sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1730               ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1731               eth_if0 =
1732                 ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
1733
1734               /* only support ethernet interface type for now */
1735               error0 =
1736                 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1737                 : error0;
1738
1739               if (error0 == ICMP6_ERROR_NONE)
1740                 {
1741                   u32 ri;
1742
1743                   /* look up the radv_t information for this interface */
1744                   vec_validate_init_empty
1745                     (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
1746
1747                   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1748
1749                   if (ri != ~0)
1750                     radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1751
1752                   error0 =
1753                     ((!radv_info) ?
1754                      ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1755                      error0);
1756
1757                   if (error0 == ICMP6_ERROR_NONE)
1758                     {
1759                       /* validate advertised information */
1760                       if ((h0->current_hop_limit && radv_info->curr_hop_limit)
1761                           && (h0->current_hop_limit !=
1762                               radv_info->curr_hop_limit))
1763                         {
1764                           ip6_neighbor_syslog (vm, LOG_WARNING,
1765                                                "our AdvCurHopLimit on %U doesn't agree with %U",
1766                                                format_vnet_sw_if_index_name,
1767                                                vnm, sw_if_index0,
1768                                                format_ip6_address,
1769                                                &ip0->src_address);
1770                         }
1771
1772                       if ((h0->flags &
1773                            ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP)
1774                           != radv_info->adv_managed_flag)
1775                         {
1776                           ip6_neighbor_syslog (vm, LOG_WARNING,
1777                                                "our AdvManagedFlag on %U doesn't agree with %U",
1778                                                format_vnet_sw_if_index_name,
1779                                                vnm, sw_if_index0,
1780                                                format_ip6_address,
1781                                                &ip0->src_address);
1782                         }
1783
1784                       if ((h0->flags &
1785                            ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP)
1786                           != radv_info->adv_other_flag)
1787                         {
1788                           ip6_neighbor_syslog (vm, LOG_WARNING,
1789                                                "our AdvOtherConfigFlag on %U doesn't agree with %U",
1790                                                format_vnet_sw_if_index_name,
1791                                                vnm, sw_if_index0,
1792                                                format_ip6_address,
1793                                                &ip0->src_address);
1794                         }
1795
1796                       if ((h0->
1797                            time_in_msec_between_retransmitted_neighbor_solicitations
1798                            && radv_info->
1799                            adv_time_in_msec_between_retransmitted_neighbor_solicitations)
1800                           && (h0->
1801                               time_in_msec_between_retransmitted_neighbor_solicitations
1802                               !=
1803                               clib_host_to_net_u32 (radv_info->
1804                                                     adv_time_in_msec_between_retransmitted_neighbor_solicitations)))
1805                         {
1806                           ip6_neighbor_syslog (vm, LOG_WARNING,
1807                                                "our AdvRetransTimer on %U doesn't agree with %U",
1808                                                format_vnet_sw_if_index_name,
1809                                                vnm, sw_if_index0,
1810                                                format_ip6_address,
1811                                                &ip0->src_address);
1812                         }
1813
1814                       if ((h0->neighbor_reachable_time_in_msec &&
1815                            radv_info->adv_neighbor_reachable_time_in_msec) &&
1816                           (h0->neighbor_reachable_time_in_msec !=
1817                            clib_host_to_net_u32
1818                            (radv_info->adv_neighbor_reachable_time_in_msec)))
1819                         {
1820                           ip6_neighbor_syslog (vm, LOG_WARNING,
1821                                                "our AdvReachableTime on %U doesn't agree with %U",
1822                                                format_vnet_sw_if_index_name,
1823                                                vnm, sw_if_index0,
1824                                                format_ip6_address,
1825                                                &ip0->src_address);
1826                         }
1827
1828                       /* check for MTU or prefix options or .. */
1829                       u8 *opt_hdr = (u8 *) (h0 + 1);
1830                       while (options_len0 > 0)
1831                         {
1832                           icmp6_neighbor_discovery_option_header_t *o0 =
1833                             (icmp6_neighbor_discovery_option_header_t *)
1834                             opt_hdr;
1835                           int opt_len = o0->n_data_u64s << 3;
1836                           icmp6_neighbor_discovery_option_type_t option_type =
1837                             o0->type;
1838
1839                           if (options_len0 < 2)
1840                             {
1841                               ip6_neighbor_syslog (vm, LOG_ERR,
1842                                                    "malformed RA packet on %U from %U",
1843                                                    format_vnet_sw_if_index_name,
1844                                                    vnm, sw_if_index0,
1845                                                    format_ip6_address,
1846                                                    &ip0->src_address);
1847                               break;
1848                             }
1849
1850                           if (opt_len == 0)
1851                             {
1852                               ip6_neighbor_syslog (vm, LOG_ERR,
1853                                                    " zero length option in RA on %U from %U",
1854                                                    format_vnet_sw_if_index_name,
1855                                                    vnm, sw_if_index0,
1856                                                    format_ip6_address,
1857                                                    &ip0->src_address);
1858                               break;
1859                             }
1860                           else if (opt_len > options_len0)
1861                             {
1862                               ip6_neighbor_syslog (vm, LOG_ERR,
1863                                                    "option length in RA packet  greater than total length on %U from %U",
1864                                                    format_vnet_sw_if_index_name,
1865                                                    vnm, sw_if_index0,
1866                                                    format_ip6_address,
1867                                                    &ip0->src_address);
1868                               break;
1869                             }
1870
1871                           options_len0 -= opt_len;
1872                           opt_hdr += opt_len;
1873
1874                           switch (option_type)
1875                             {
1876                             case ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu:
1877                               {
1878                                 icmp6_neighbor_discovery_mtu_option_t *h =
1879                                   (icmp6_neighbor_discovery_mtu_option_t
1880                                    *) (o0);
1881
1882                                 if (opt_len < sizeof (*h))
1883                                   break;
1884
1885                                 if ((h->mtu && radv_info->adv_link_mtu) &&
1886                                     (h->mtu !=
1887                                      clib_host_to_net_u32
1888                                      (radv_info->adv_link_mtu)))
1889                                   {
1890                                     ip6_neighbor_syslog (vm, LOG_WARNING,
1891                                                          "our AdvLinkMTU on %U doesn't agree with %U",
1892                                                          format_vnet_sw_if_index_name,
1893                                                          vnm, sw_if_index0,
1894                                                          format_ip6_address,
1895                                                          &ip0->src_address);
1896                                   }
1897                               }
1898                               break;
1899
1900                             case ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information:
1901                               {
1902                                 icmp6_neighbor_discovery_prefix_information_option_t
1903                                   * h =
1904                                   (icmp6_neighbor_discovery_prefix_information_option_t
1905                                    *) (o0);
1906
1907                                 /* validate advertised prefix options  */
1908                                 ip6_radv_prefix_t *pr_info;
1909                                 u32 preferred, valid;
1910
1911                                 if (opt_len < sizeof (*h))
1912                                   break;
1913
1914                                 preferred =
1915                                   clib_net_to_host_u32 (h->preferred_time);
1916                                 valid = clib_net_to_host_u32 (h->valid_time);
1917
1918                                 /* look for matching prefix - if we our advertising it, it better be consistant */
1919                                 /* *INDENT-OFF* */
1920                                 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
1921                                 ({
1922
1923                                   ip6_address_t mask;
1924                                   ip6_address_mask_from_width(&mask, pr_info->prefix_len);
1925
1926                                   if(pr_info->enabled &&
1927                                      (pr_info->prefix_len == h->dst_address_length) &&
1928                                      ip6_address_is_equal_masked (&pr_info->prefix,  &h->dst_address, &mask))
1929                                     {
1930                                       /* found it */
1931                                       if(!pr_info->decrement_lifetime_flag &&
1932                                          valid != pr_info->adv_valid_lifetime_in_secs)
1933                                         {
1934                                           ip6_neighbor_syslog(vm,  LOG_WARNING,
1935                                                               "our ADV validlifetime on  %U for %U does not  agree with %U",
1936                                                               format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
1937                                                               format_ip6_address, &h->dst_address);
1938                                         }
1939                                       if(!pr_info->decrement_lifetime_flag &&
1940                                          preferred != pr_info->adv_pref_lifetime_in_secs)
1941                                         {
1942                                           ip6_neighbor_syslog(vm,  LOG_WARNING,
1943                                                               "our ADV preferredlifetime on  %U for %U does not  agree with %U",
1944                                                               format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
1945                                                               format_ip6_address, &h->dst_address);
1946                                         }
1947                                     }
1948                                   break;
1949                                 }));
1950                                 /* *INDENT-ON* */
1951                                 break;
1952                               }
1953                             default:
1954                               /* skip this one */
1955                               break;
1956                             }
1957                         }
1958                     }
1959                 }
1960             }
1961
1962           p0->error = error_node->errors[error0];
1963
1964           if (error0 != ICMP6_ERROR_NONE)
1965             vlib_error_count (vm, error_node->node_index, error0, 1);
1966
1967           vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1968                                            to_next, n_left_to_next,
1969                                            bi0, next0);
1970         }
1971
1972       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1973     }
1974
1975   /* Account for router advertisements sent. */
1976   vlib_error_count (vm, error_node->node_index,
1977                     ICMP6_ERROR_ROUTER_ADVERTISEMENTS_RX,
1978                     n_advertisements_rcvd);
1979
1980   return frame->n_vectors;
1981 }
1982
1983 /**
1984  * @brief Add a multicast Address to the advertised MLD set
1985  */
1986 static void
1987 ip6_neighbor_add_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
1988 {
1989   ip6_mldp_group_t *mcast_group_info;
1990   uword *p;
1991
1992   /* lookup  mldp info for this interface */
1993   p = mhash_get (&radv_info->address_to_mldp_index, &addr);
1994   mcast_group_info =
1995     p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
1996
1997   /* add address */
1998   if (!mcast_group_info)
1999     {
2000       /* add */
2001       u32 mi;
2002       pool_get (radv_info->mldp_group_pool, mcast_group_info);
2003
2004       mi = mcast_group_info - radv_info->mldp_group_pool;
2005       mhash_set (&radv_info->address_to_mldp_index, &addr, mi,  /* old_value */
2006                  0);
2007
2008       mcast_group_info->type = 4;
2009       mcast_group_info->mcast_source_address_pool = 0;
2010       mcast_group_info->num_sources = 0;
2011       clib_memcpy (&mcast_group_info->mcast_address, &addr,
2012                    sizeof (ip6_address_t));
2013     }
2014 }
2015
2016 /**
2017  * @brief Delete a multicast Address from the advertised MLD set
2018  */
2019 static void
2020 ip6_neighbor_del_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2021 {
2022   ip6_mldp_group_t *mcast_group_info;
2023   uword *p;
2024
2025   p = mhash_get (&radv_info->address_to_mldp_index, &addr);
2026   mcast_group_info =
2027     p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2028
2029   if (mcast_group_info)
2030     {
2031       mhash_unset (&radv_info->address_to_mldp_index, &addr,
2032                    /* old_value */ 0);
2033       pool_put (radv_info->mldp_group_pool, mcast_group_info);
2034     }
2035 }
2036
2037 /**
2038  * @brief Add a multicast Address to the advertised MLD set
2039  */
2040 static void
2041 ip6_neighbor_add_mld_grp (ip6_radv_t * a,
2042                           ip6_multicast_address_scope_t scope,
2043                           ip6_multicast_link_local_group_id_t group)
2044 {
2045   ip6_address_t addr;
2046
2047   ip6_set_reserved_multicast_address (&addr, scope, group);
2048
2049   ip6_neighbor_add_mld_prefix (a, &addr);
2050 }
2051
2052 /**
2053  * @brief create and initialize router advertisement parameters with default
2054  * values for this intfc
2055  */
2056 static u32
2057 ip6_neighbor_sw_interface_add_del (vnet_main_t * vnm,
2058                                    u32 sw_if_index, u32 is_add)
2059 {
2060   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2061   ip6_radv_t *a = 0;
2062   u32 ri = ~0;
2063   vnet_sw_interface_t *sw_if0;
2064   ethernet_interface_t *eth_if0 = 0;
2065
2066   /* lookup radv container  - ethernet interfaces only */
2067   sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2068   if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2069     eth_if0 = ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
2070
2071   if (!eth_if0)
2072     return ri;
2073
2074   vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2075                            ~0);
2076   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2077
2078   if (ri != ~0)
2079     {
2080       a = pool_elt_at_index (nm->if_radv_pool, ri);
2081
2082       if (!is_add)
2083         {
2084           ip6_radv_prefix_t *p;
2085           ip6_mldp_group_t *m;
2086
2087           /* release the lock on the interface's mcast adj */
2088           adj_unlock (a->mcast_adj_index);
2089
2090           /* clean up prefix and MDP pools */
2091           /* *INDENT-OFF* */
2092           pool_flush(p, a->adv_prefixes_pool,
2093           ({
2094               mhash_unset (&a->address_to_prefix_index, &p->prefix, 0);
2095           }));
2096           pool_flush (m, a->mldp_group_pool,
2097           ({
2098               mhash_unset (&a->address_to_mldp_index, &m->mcast_address, 0);
2099           }));
2100           /* *INDENT-ON* */
2101
2102           pool_free (a->mldp_group_pool);
2103           pool_free (a->adv_prefixes_pool);
2104
2105           mhash_free (&a->address_to_prefix_index);
2106           mhash_free (&a->address_to_mldp_index);
2107
2108           pool_put (nm->if_radv_pool, a);
2109           nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ~0;
2110           ri = ~0;
2111         }
2112     }
2113   else
2114     {
2115       if (is_add)
2116         {
2117           vnet_hw_interface_t *hw_if0;
2118
2119           hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index);
2120
2121           pool_get (nm->if_radv_pool, a);
2122
2123           ri = a - nm->if_radv_pool;
2124           nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ri;
2125
2126           /* initialize default values (most of which are zero) */
2127           memset (a, 0, sizeof (a[0]));
2128
2129           a->sw_if_index = sw_if_index;
2130           a->max_radv_interval = DEF_MAX_RADV_INTERVAL;
2131           a->min_radv_interval = DEF_MIN_RADV_INTERVAL;
2132           a->curr_hop_limit = DEF_CURR_HOP_LIMIT;
2133           a->adv_router_lifetime_in_sec = DEF_DEF_RTR_LIFETIME;
2134
2135           /* send ll address source address option */
2136           a->adv_link_layer_address = 1;
2137
2138           a->min_delay_between_radv = MIN_DELAY_BETWEEN_RAS;
2139           a->max_delay_between_radv = MAX_DELAY_BETWEEN_RAS;
2140           a->max_rtr_default_lifetime = MAX_DEF_RTR_LIFETIME;
2141           a->seed = (u32) clib_cpu_time_now ();
2142           (void) random_u32 (&a->seed);
2143           a->randomizer = clib_cpu_time_now ();
2144           (void) random_u64 (&a->randomizer);
2145
2146           a->initial_adverts_count = MAX_INITIAL_RTR_ADVERTISEMENTS;
2147           a->initial_adverts_sent = a->initial_adverts_count - 1;
2148           a->initial_adverts_interval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
2149
2150           /* deafult is to send */
2151           a->send_radv = 1;
2152
2153           /* fill in radv_info for this interface that will be needed later */
2154           a->adv_link_mtu = hw_if0->max_l3_packet_bytes[VLIB_RX];
2155
2156           clib_memcpy (a->link_layer_address, eth_if0->address, 6);
2157
2158           /* fill in default link-local address  (this may be overridden) */
2159           ip6_link_local_address_from_ethernet_address
2160             (&a->link_local_address, eth_if0->address);
2161
2162           mhash_init (&a->address_to_prefix_index, sizeof (uword),
2163                       sizeof (ip6_address_t));
2164           mhash_init (&a->address_to_mldp_index, sizeof (uword),
2165                       sizeof (ip6_address_t));
2166
2167           a->mcast_adj_index = adj_mcast_add_or_lock (FIB_PROTOCOL_IP6,
2168                                                       VNET_LINK_IP6,
2169                                                       sw_if_index);
2170
2171           /* add multicast groups we will always be reporting  */
2172           ip6_neighbor_add_mld_grp (a,
2173                                     IP6_MULTICAST_SCOPE_link_local,
2174                                     IP6_MULTICAST_GROUP_ID_all_hosts);
2175           ip6_neighbor_add_mld_grp (a,
2176                                     IP6_MULTICAST_SCOPE_link_local,
2177                                     IP6_MULTICAST_GROUP_ID_all_routers);
2178           ip6_neighbor_add_mld_grp (a,
2179                                     IP6_MULTICAST_SCOPE_link_local,
2180                                     IP6_MULTICAST_GROUP_ID_mldv2_routers);
2181         }
2182     }
2183   return ri;
2184 }
2185
2186 /* send an mldpv2 report  */
2187 static void
2188 ip6_neighbor_send_mldpv2_report (u32 sw_if_index)
2189 {
2190   vnet_main_t *vnm = vnet_get_main ();
2191   vlib_main_t *vm = vnm->vlib_main;
2192   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2193   vnet_sw_interface_t *sw_if0;
2194   ethernet_interface_t *eth_if0;
2195   u32 ri;
2196   int bogus_length;
2197
2198   ip6_radv_t *radv_info;
2199   u16 payload_length;
2200   vlib_buffer_t *b0;
2201   ip6_header_t *ip0;
2202   u32 *to_next;
2203   vlib_frame_t *f;
2204   u32 bo0;
2205   u32 n_to_alloc = 1;
2206   u32 n_allocated;
2207
2208   icmp6_multicast_listener_report_header_t *rh0;
2209   icmp6_multicast_listener_report_packet_t *rp0;
2210
2211   sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2212   ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
2213   eth_if0 = ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
2214
2215   if (!eth_if0 || !vnet_sw_interface_is_admin_up (vnm, sw_if_index))
2216     return;
2217
2218   /* look up the radv_t  information for this interface */
2219   vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2220                            ~0);
2221
2222   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2223
2224   if (ri == ~0)
2225     return;
2226
2227   /* send report now - build a mldpv2 report packet  */
2228   n_allocated = vlib_buffer_alloc_from_free_list (vm,
2229                                                   &bo0,
2230                                                   n_to_alloc,
2231                                                   VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2232   if (PREDICT_FALSE (n_allocated == 0))
2233     {
2234       clib_warning ("buffer allocation failure");
2235       return;
2236     }
2237
2238   b0 = vlib_get_buffer (vm, bo0);
2239
2240   /* adjust the sizeof the buffer to just include the ipv6 header */
2241   b0->current_length = sizeof (icmp6_multicast_listener_report_packet_t);
2242
2243   payload_length = sizeof (icmp6_multicast_listener_report_header_t);
2244
2245   b0->error = ICMP6_ERROR_NONE;
2246
2247   rp0 = vlib_buffer_get_current (b0);
2248   ip0 = (ip6_header_t *) & rp0->ip;
2249   rh0 = (icmp6_multicast_listener_report_header_t *) & rp0->report_hdr;
2250
2251   memset (rp0, 0x0, sizeof (icmp6_multicast_listener_report_packet_t));
2252
2253   ip0->ip_version_traffic_class_and_flow_label =
2254     clib_host_to_net_u32 (0x6 << 28);
2255
2256   ip0->protocol = IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS;
2257   /* for DEBUG - vnet driver won't seem to emit router alerts */
2258   /* ip0->protocol = IP_PROTOCOL_ICMP6; */
2259   ip0->hop_limit = 1;
2260
2261   rh0->icmp.type = ICMP6_multicast_listener_report_v2;
2262
2263   /* source address MUST be the link-local address */
2264   radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2265   ip0->src_address = radv_info->link_local_address;
2266
2267   /* destination is all mldpv2 routers */
2268   ip6_set_reserved_multicast_address (&ip0->dst_address,
2269                                       IP6_MULTICAST_SCOPE_link_local,
2270                                       IP6_MULTICAST_GROUP_ID_mldv2_routers);
2271
2272   /* add reports here */
2273   ip6_mldp_group_t *m;
2274   int num_addr_records = 0;
2275   icmp6_multicast_address_record_t rr;
2276
2277   /* fill in the hop-by-hop extension header (router alert) info */
2278   rh0->ext_hdr.next_hdr = IP_PROTOCOL_ICMP6;
2279   rh0->ext_hdr.n_data_u64s = 0;
2280
2281   rh0->alert.type = IP6_MLDP_ALERT_TYPE;
2282   rh0->alert.len = 2;
2283   rh0->alert.value = 0;
2284
2285   rh0->pad.type = 1;
2286   rh0->pad.len = 0;
2287
2288   rh0->icmp.checksum = 0;
2289
2290   /* *INDENT-OFF* */
2291   pool_foreach (m, radv_info->mldp_group_pool,
2292   ({
2293     rr.type = m->type;
2294     rr.aux_data_len_u32s = 0;
2295     rr.num_sources = clib_host_to_net_u16 (m->num_sources);
2296     clib_memcpy(&rr.mcast_addr, &m->mcast_address, sizeof(ip6_address_t));
2297
2298     num_addr_records++;
2299
2300     vlib_buffer_add_data
2301       (vm, b0->free_list_index, bo0,
2302        (void *)&rr, sizeof(icmp6_multicast_address_record_t));
2303
2304     payload_length += sizeof( icmp6_multicast_address_record_t);
2305   }));
2306   /* *INDENT-ON* */
2307
2308   rh0->rsvd = 0;
2309   rh0->num_addr_records = clib_host_to_net_u16 (num_addr_records);
2310
2311   /* update lengths */
2312   ip0->payload_length = clib_host_to_net_u16 (payload_length);
2313
2314   rh0->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0,
2315                                                           &bogus_length);
2316   ASSERT (bogus_length == 0);
2317
2318   /*
2319    * OK to override w/ no regard for actual FIB, because
2320    * ip6-rewrite only looks at the adjacency.
2321    */
2322   vnet_buffer (b0)->sw_if_index[VLIB_RX] =
2323     vnet_main.local_interface_sw_if_index;
2324
2325   vnet_buffer (b0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
2326   b0->flags |= VNET_BUFFER_LOCALLY_ORIGINATED;
2327
2328   vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite-mcast");
2329
2330   f = vlib_get_frame_to_node (vm, node->index);
2331   to_next = vlib_frame_vector_args (f);
2332   to_next[0] = bo0;
2333   f->n_vectors = 1;
2334
2335   vlib_put_frame_to_node (vm, node->index, f);
2336   return;
2337 }
2338
2339 /* *INDENT-OFF* */
2340 VLIB_REGISTER_NODE (ip6_icmp_router_solicitation_node,static) =
2341 {
2342   .function = icmp6_router_solicitation,
2343   .name = "icmp6-router-solicitation",
2344
2345   .vector_size = sizeof (u32),
2346
2347   .format_trace = format_icmp6_input_trace,
2348
2349   .n_next_nodes = ICMP6_ROUTER_SOLICITATION_N_NEXT,
2350   .next_nodes = {
2351     [ICMP6_ROUTER_SOLICITATION_NEXT_DROP] = "error-drop",
2352     [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW] = "ip6-rewrite-mcast",
2353     [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX] = "interface-output",
2354   },
2355 };
2356 /* *INDENT-ON* */
2357
2358 /* send a RA or update the timer info etc.. */
2359 static uword
2360 ip6_neighbor_process_timer_event (vlib_main_t * vm,
2361                                   vlib_node_runtime_t * node,
2362                                   vlib_frame_t * frame)
2363 {
2364   vnet_main_t *vnm = vnet_get_main ();
2365   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2366   ip6_radv_t *radv_info;
2367   vlib_frame_t *f = 0;
2368   u32 n_this_frame = 0;
2369   u32 n_left_to_next = 0;
2370   u32 *to_next = 0;
2371   u32 bo0;
2372   icmp6_router_solicitation_header_t *h0;
2373   vlib_buffer_t *b0;
2374   f64 now = vlib_time_now (vm);
2375
2376   /* Interface ip6 radv info list */
2377   /* *INDENT-OFF* */
2378   pool_foreach (radv_info, nm->if_radv_pool,
2379   ({
2380     if( !vnet_sw_interface_is_admin_up (vnm, radv_info->sw_if_index))
2381       {
2382         radv_info->initial_adverts_sent = radv_info->initial_adverts_count-1;
2383         radv_info->next_multicast_time = now;
2384         radv_info->last_multicast_time = now;
2385         radv_info->last_radv_time = 0;
2386         radv_info->all_routers_mcast = 0;
2387         continue;
2388       }
2389
2390     /* Make sure that we've joined the all-routers multicast group */
2391     if(!radv_info->all_routers_mcast)
2392       {
2393         /* send MDLP_REPORT_EVENT message */
2394         ip6_neighbor_send_mldpv2_report(radv_info->sw_if_index);
2395         radv_info->all_routers_mcast = 1;
2396       }
2397
2398     /* is it time to send a multicast  RA on this interface? */
2399     if(radv_info->send_radv && (now >=  radv_info->next_multicast_time))
2400       {
2401         u32 n_to_alloc = 1;
2402         u32 n_allocated;
2403
2404         f64 rfn = (radv_info->max_radv_interval - radv_info->min_radv_interval) *
2405           random_f64 (&radv_info->seed) + radv_info->min_radv_interval;
2406
2407         /* multicast send - compute next multicast send time */
2408         if( radv_info->initial_adverts_sent > 0)
2409           {
2410             radv_info->initial_adverts_sent--;
2411             if(rfn > radv_info-> initial_adverts_interval)
2412               rfn =  radv_info-> initial_adverts_interval;
2413
2414             /* check to see if we are ceasing to send */
2415             if( radv_info->initial_adverts_sent  == 0)
2416               if(radv_info->cease_radv)
2417                 radv_info->send_radv = 0;
2418           }
2419
2420         radv_info->next_multicast_time =  rfn + now;
2421         radv_info->last_multicast_time = now;
2422
2423         /* send advert now - build a "solicted" router advert with unspecified source address */
2424         n_allocated = vlib_buffer_alloc_from_free_list
2425           (vm, &bo0, n_to_alloc, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2426
2427         if (PREDICT_FALSE(n_allocated == 0))
2428           {
2429             clib_warning ("buffer allocation failure");
2430             continue;
2431           }
2432         b0 = vlib_get_buffer (vm, bo0);
2433         b0->current_length = sizeof( icmp6_router_solicitation_header_t);
2434         b0->error = ICMP6_ERROR_NONE;
2435         vnet_buffer (b0)->sw_if_index[VLIB_RX] = radv_info->sw_if_index;
2436
2437         h0 =  vlib_buffer_get_current (b0);
2438
2439         memset (h0, 0, sizeof (icmp6_router_solicitation_header_t));
2440
2441         h0->ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2442         h0->ip.payload_length = clib_host_to_net_u16 (sizeof (icmp6_router_solicitation_header_t)
2443                                                       - STRUCT_OFFSET_OF (icmp6_router_solicitation_header_t, neighbor));
2444         h0->ip.protocol = IP_PROTOCOL_ICMP6;
2445         h0->ip.hop_limit = 255;
2446
2447         /* set src/dst address as "unspecified" this marks this packet as internally generated rather than recieved */
2448         h0->ip.src_address.as_u64[0] = 0;
2449         h0->ip.src_address.as_u64[1] = 0;
2450
2451         h0->ip.dst_address.as_u64[0] = 0;
2452         h0->ip.dst_address.as_u64[1] = 0;
2453
2454         h0->neighbor.icmp.type = ICMP6_router_solicitation;
2455
2456         if (PREDICT_FALSE(f == 0))
2457           {
2458             f = vlib_get_frame_to_node (vm, ip6_icmp_router_solicitation_node.index);
2459             to_next = vlib_frame_vector_args (f);
2460             n_left_to_next = VLIB_FRAME_SIZE;
2461             n_this_frame = 0;
2462           }
2463
2464         n_this_frame++;
2465         n_left_to_next--;
2466         to_next[0] = bo0;
2467         to_next += 1;
2468
2469         if (PREDICT_FALSE(n_left_to_next == 0))
2470           {
2471             f->n_vectors = n_this_frame;
2472             vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2473             f = 0;
2474           }
2475       }
2476   }));
2477   /* *INDENT-ON* */
2478
2479   if (f)
2480     {
2481       ASSERT (n_this_frame);
2482       f->n_vectors = n_this_frame;
2483       vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2484     }
2485   return 0;
2486 }
2487
2488 static uword
2489 ip6_icmp_neighbor_discovery_event_process (vlib_main_t * vm,
2490                                            vlib_node_runtime_t * node,
2491                                            vlib_frame_t * frame)
2492 {
2493   uword event_type;
2494   ip6_icmp_neighbor_discovery_event_data_t *event_data;
2495
2496   /* init code here */
2497
2498   while (1)
2499     {
2500       vlib_process_wait_for_event_or_clock (vm, 1. /* seconds */ );
2501
2502       event_data = vlib_process_get_event_data (vm, &event_type);
2503
2504       if (!event_data)
2505         {
2506           /* No events found: timer expired. */
2507           /* process interface list and send RAs as appropriate, update timer info */
2508           ip6_neighbor_process_timer_event (vm, node, frame);
2509         }
2510       else
2511         {
2512           switch (event_type)
2513             {
2514
2515             case ICMP6_ND_EVENT_INIT:
2516               break;
2517
2518             case ~0:
2519               break;
2520
2521             default:
2522               ASSERT (0);
2523             }
2524
2525           if (event_data)
2526             _vec_len (event_data) = 0;
2527         }
2528     }
2529   return frame->n_vectors;
2530 }
2531
2532 /* *INDENT-OFF* */
2533 VLIB_REGISTER_NODE (ip6_icmp_router_advertisement_node,static) =
2534 {
2535   .function = icmp6_router_advertisement,
2536   .name = "icmp6-router-advertisement",
2537
2538   .vector_size = sizeof (u32),
2539
2540   .format_trace = format_icmp6_input_trace,
2541
2542   .n_next_nodes = 1,
2543   .next_nodes = {
2544     [0] = "error-drop",
2545   },
2546 };
2547 /* *INDENT-ON* */
2548
2549 vlib_node_registration_t ip6_icmp_neighbor_discovery_event_node = {
2550
2551   .function = ip6_icmp_neighbor_discovery_event_process,
2552   .name = "ip6-icmp-neighbor-discovery-event-process",
2553   .type = VLIB_NODE_TYPE_PROCESS,
2554 };
2555
2556 static uword
2557 icmp6_neighbor_solicitation (vlib_main_t * vm,
2558                              vlib_node_runtime_t * node, vlib_frame_t * frame)
2559 {
2560   return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
2561                                                        /* is_solicitation */
2562                                                        1);
2563 }
2564
2565 static uword
2566 icmp6_neighbor_advertisement (vlib_main_t * vm,
2567                               vlib_node_runtime_t * node,
2568                               vlib_frame_t * frame)
2569 {
2570   return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
2571                                                        /* is_solicitation */
2572                                                        0);
2573 }
2574
2575 /* *INDENT-OFF* */
2576 VLIB_REGISTER_NODE (ip6_icmp_neighbor_solicitation_node,static) =
2577 {
2578   .function = icmp6_neighbor_solicitation,
2579   .name = "icmp6-neighbor-solicitation",
2580
2581   .vector_size = sizeof (u32),
2582
2583   .format_trace = format_icmp6_input_trace,
2584
2585   .n_next_nodes = ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
2586   .next_nodes = {
2587     [ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP] = "error-drop",
2588     [ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY] = "interface-output",
2589   },
2590 };
2591 /* *INDENT-ON* */
2592
2593 /* *INDENT-OFF* */
2594 VLIB_REGISTER_NODE (ip6_icmp_neighbor_advertisement_node,static) =
2595 {
2596   .function = icmp6_neighbor_advertisement,
2597   .name = "icmp6-neighbor-advertisement",
2598
2599   .vector_size = sizeof (u32),
2600
2601   .format_trace = format_icmp6_input_trace,
2602
2603   .n_next_nodes = 1,
2604   .next_nodes = {
2605     [0] = "error-drop",
2606   },
2607 };
2608 /* *INDENT-ON* */
2609
2610 /* API support functions */
2611 int
2612 ip6_neighbor_ra_config (vlib_main_t * vm, u32 sw_if_index,
2613                         u8 suppress, u8 managed, u8 other,
2614                         u8 ll_option, u8 send_unicast, u8 cease,
2615                         u8 use_lifetime, u32 lifetime,
2616                         u32 initial_count, u32 initial_interval,
2617                         u32 max_interval, u32 min_interval, u8 is_no)
2618 {
2619   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2620   int error;
2621   u32 ri;
2622
2623   /* look up the radv_t  information for this interface */
2624   vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2625                            ~0);
2626   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2627   error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
2628
2629   if (!error)
2630     {
2631
2632       ip6_radv_t *radv_info;
2633       radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2634
2635       if ((max_interval != 0) && (min_interval == 0))
2636         min_interval = .75 * max_interval;
2637
2638       max_interval =
2639         (max_interval !=
2640          0) ? ((is_no) ? DEF_MAX_RADV_INTERVAL : max_interval) :
2641         radv_info->max_radv_interval;
2642       min_interval =
2643         (min_interval !=
2644          0) ? ((is_no) ? DEF_MIN_RADV_INTERVAL : min_interval) :
2645         radv_info->min_radv_interval;
2646       lifetime =
2647         (use_lifetime !=
2648          0) ? ((is_no) ? DEF_DEF_RTR_LIFETIME : lifetime) :
2649         radv_info->adv_router_lifetime_in_sec;
2650
2651       if (lifetime)
2652         {
2653           if (lifetime > MAX_DEF_RTR_LIFETIME)
2654             lifetime = MAX_DEF_RTR_LIFETIME;
2655
2656           if (lifetime <= max_interval)
2657             return VNET_API_ERROR_INVALID_VALUE;
2658         }
2659
2660       if (min_interval != 0)
2661         {
2662           if ((min_interval > .75 * max_interval) || (min_interval < 3))
2663             return VNET_API_ERROR_INVALID_VALUE;
2664         }
2665
2666       if ((initial_count > MAX_INITIAL_RTR_ADVERTISEMENTS) ||
2667           (initial_interval > MAX_INITIAL_RTR_ADVERT_INTERVAL))
2668         return VNET_API_ERROR_INVALID_VALUE;
2669
2670       /*
2671          if "flag" is set and is_no is true then restore default value else set value corresponding to "flag"
2672          if "flag" is clear  don't change corresponding value
2673        */
2674       radv_info->send_radv =
2675         (suppress != 0) ? ((is_no != 0) ? 1 : 0) : radv_info->send_radv;
2676       radv_info->adv_managed_flag =
2677         (managed != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_managed_flag;
2678       radv_info->adv_other_flag =
2679         (other != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_other_flag;
2680       radv_info->adv_link_layer_address =
2681         (ll_option !=
2682          0) ? ((is_no) ? 1 : 0) : radv_info->adv_link_layer_address;
2683       radv_info->send_unicast =
2684         (send_unicast != 0) ? ((is_no) ? 0 : 1) : radv_info->send_unicast;
2685       radv_info->cease_radv =
2686         (cease != 0) ? ((is_no) ? 0 : 1) : radv_info->cease_radv;
2687
2688       radv_info->min_radv_interval = min_interval;
2689       radv_info->max_radv_interval = max_interval;
2690       radv_info->adv_router_lifetime_in_sec = lifetime;
2691
2692       radv_info->initial_adverts_count =
2693         (initial_count !=
2694          0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERTISEMENTS : initial_count) :
2695         radv_info->initial_adverts_count;
2696       radv_info->initial_adverts_interval =
2697         (initial_interval !=
2698          0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERT_INTERVAL : initial_interval) :
2699         radv_info->initial_adverts_interval;
2700
2701       /* restart */
2702       if ((cease != 0) && (is_no))
2703         radv_info->send_radv = 1;
2704
2705       radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
2706       radv_info->next_multicast_time = vlib_time_now (vm);
2707       radv_info->last_multicast_time = vlib_time_now (vm);
2708       radv_info->last_radv_time = 0;
2709     }
2710   return (error);
2711 }
2712
2713 int
2714 ip6_neighbor_ra_prefix (vlib_main_t * vm, u32 sw_if_index,
2715                         ip6_address_t * prefix_addr, u8 prefix_len,
2716                         u8 use_default, u32 val_lifetime, u32 pref_lifetime,
2717                         u8 no_advertise, u8 off_link, u8 no_autoconfig,
2718                         u8 no_onlink, u8 is_no)
2719 {
2720   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2721   int error;
2722
2723   u32 ri;
2724
2725   /* look up the radv_t  information for this interface */
2726   vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2727                            ~0);
2728
2729   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2730
2731   error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
2732
2733   if (!error)
2734     {
2735       f64 now = vlib_time_now (vm);
2736       ip6_radv_t *radv_info;
2737       radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2738
2739       /* prefix info add, delete or update */
2740       ip6_radv_prefix_t *prefix;
2741
2742       /* lookup  prefix info for this  address on this interface */
2743       uword *p = mhash_get (&radv_info->address_to_prefix_index, prefix_addr);
2744
2745       prefix = p ? pool_elt_at_index (radv_info->adv_prefixes_pool, p[0]) : 0;
2746
2747       if (is_no)
2748         {
2749           /* delete */
2750           if (!prefix)
2751             return VNET_API_ERROR_INVALID_VALUE;        /* invalid prefix */
2752
2753           if (prefix->prefix_len != prefix_len)
2754             return VNET_API_ERROR_INVALID_VALUE_2;
2755
2756           /* FIXME - Should the DP do this or the CP ? */
2757           /* do specific delete processing here before returning */
2758           /* try to remove from routing table */
2759
2760           mhash_unset (&radv_info->address_to_prefix_index, prefix_addr,
2761                        /* old_value */ 0);
2762           pool_put (radv_info->adv_prefixes_pool, prefix);
2763
2764           radv_info->initial_adverts_sent =
2765             radv_info->initial_adverts_count - 1;
2766           radv_info->next_multicast_time = vlib_time_now (vm);
2767           radv_info->last_multicast_time = vlib_time_now (vm);
2768           radv_info->last_radv_time = 0;
2769           return (error);
2770         }
2771
2772       /* adding or changing */
2773       if (!prefix)
2774         {
2775           /* add */
2776           u32 pi;
2777           pool_get (radv_info->adv_prefixes_pool, prefix);
2778           pi = prefix - radv_info->adv_prefixes_pool;
2779           mhash_set (&radv_info->address_to_prefix_index, prefix_addr, pi,
2780                      /* old_value */ 0);
2781
2782           memset (prefix, 0x0, sizeof (ip6_radv_prefix_t));
2783
2784           prefix->prefix_len = prefix_len;
2785           clib_memcpy (&prefix->prefix, prefix_addr, sizeof (ip6_address_t));
2786
2787           /* initialize default values */
2788           prefix->adv_on_link_flag = 1; /* L bit set */
2789           prefix->adv_autonomous_flag = 1;      /* A bit set */
2790           prefix->adv_valid_lifetime_in_secs = DEF_ADV_VALID_LIFETIME;
2791           prefix->adv_pref_lifetime_in_secs = DEF_ADV_PREF_LIFETIME;
2792           prefix->enabled = 1;
2793           prefix->decrement_lifetime_flag = 1;
2794           prefix->deprecated_prefix_flag = 1;
2795
2796           if (off_link == 0)
2797             {
2798               /* FIXME - Should the DP do this or the CP ? */
2799               /* insert prefix into routing table as a connected prefix */
2800             }
2801
2802           if (use_default)
2803             goto restart;
2804         }
2805       else
2806         {
2807
2808           if (prefix->prefix_len != prefix_len)
2809             return VNET_API_ERROR_INVALID_VALUE_2;
2810
2811           if (off_link != 0)
2812             {
2813               /* FIXME - Should the DP do this or the CP ? */
2814               /* remove from routing table if already there */
2815             }
2816         }
2817
2818       if ((val_lifetime == ~0) || (pref_lifetime == ~0))
2819         {
2820           prefix->adv_valid_lifetime_in_secs = ~0;
2821           prefix->adv_pref_lifetime_in_secs = ~0;
2822           prefix->decrement_lifetime_flag = 0;
2823         }
2824       else
2825         {
2826           prefix->adv_valid_lifetime_in_secs = val_lifetime;;
2827           prefix->adv_pref_lifetime_in_secs = pref_lifetime;
2828         }
2829
2830       /* copy  remaining */
2831       prefix->enabled = !(no_advertise != 0);
2832       prefix->adv_on_link_flag = !((off_link != 0) || (no_onlink != 0));
2833       prefix->adv_autonomous_flag = !(no_autoconfig != 0);
2834
2835     restart:
2836       /* restart */
2837       /* fill in the expiration times  */
2838       prefix->valid_lifetime_expires =
2839         now + prefix->adv_valid_lifetime_in_secs;
2840       prefix->pref_lifetime_expires = now + prefix->adv_pref_lifetime_in_secs;
2841
2842       radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
2843       radv_info->next_multicast_time = vlib_time_now (vm);
2844       radv_info->last_multicast_time = vlib_time_now (vm);
2845       radv_info->last_radv_time = 0;
2846     }
2847   return (error);
2848 }
2849
2850 clib_error_t *
2851 ip6_neighbor_cmd (vlib_main_t * vm, unformat_input_t * main_input,
2852                   vlib_cli_command_t * cmd)
2853 {
2854   vnet_main_t *vnm = vnet_get_main ();
2855   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2856   clib_error_t *error = 0;
2857   u8 is_no = 0;
2858   u8 suppress = 0, managed = 0, other = 0;
2859   u8 suppress_ll_option = 0, send_unicast = 0, cease = 0;
2860   u8 use_lifetime = 0;
2861   u32 sw_if_index, ra_lifetime = 0, ra_initial_count =
2862     0, ra_initial_interval = 0;
2863   u32 ra_max_interval = 0, ra_min_interval = 0;
2864
2865   unformat_input_t _line_input, *line_input = &_line_input;
2866   vnet_sw_interface_t *sw_if0;
2867
2868   int add_radv_info = 1;
2869   __attribute__ ((unused)) ip6_radv_t *radv_info = 0;
2870   ip6_address_t ip6_addr;
2871   u32 addr_len;
2872
2873
2874   /* Get a line of input. */
2875   if (!unformat_user (main_input, unformat_line_input, line_input))
2876     return 0;
2877
2878   /* get basic radv info for this interface */
2879   if (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2880     {
2881
2882       if (unformat_user (line_input,
2883                          unformat_vnet_sw_interface, vnm, &sw_if_index))
2884         {
2885           u32 ri;
2886           ethernet_interface_t *eth_if0 = 0;
2887
2888           sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2889           if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2890             eth_if0 =
2891               ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
2892
2893           if (!eth_if0)
2894             {
2895               error =
2896                 clib_error_return (0, "Interface must be of ethernet type");
2897               goto done;
2898             }
2899
2900           /* look up the radv_t  information for this interface */
2901           vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
2902                                    sw_if_index, ~0);
2903
2904           ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2905
2906           if (ri != ~0)
2907             {
2908               radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2909             }
2910           else
2911             {
2912               error = clib_error_return (0, "unknown interface %U'",
2913                                          format_unformat_error, line_input);
2914               goto done;
2915             }
2916         }
2917       else
2918         {
2919           error = clib_error_return (0, "invalid interface name %U'",
2920                                      format_unformat_error, line_input);
2921           goto done;
2922         }
2923     }
2924
2925   /* get the rest of the command */
2926   while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2927     {
2928       if (unformat (line_input, "no"))
2929         is_no = 1;
2930       else if (unformat (line_input, "prefix %U/%d",
2931                          unformat_ip6_address, &ip6_addr, &addr_len))
2932         {
2933           add_radv_info = 0;
2934           break;
2935         }
2936       else if (unformat (line_input, "ra-managed-config-flag"))
2937         {
2938           managed = 1;
2939           break;
2940         }
2941       else if (unformat (line_input, "ra-other-config-flag"))
2942         {
2943           other = 1;
2944           break;
2945         }
2946       else if (unformat (line_input, "ra-suppress") ||
2947                unformat (line_input, "ra-surpress"))
2948         {
2949           suppress = 1;
2950           break;
2951         }
2952       else if (unformat (line_input, "ra-suppress-link-layer") ||
2953                unformat (line_input, "ra-surpress-link-layer"))
2954         {
2955           suppress_ll_option = 1;
2956           break;
2957         }
2958       else if (unformat (line_input, "ra-send-unicast"))
2959         {
2960           send_unicast = 1;
2961           break;
2962         }
2963       else if (unformat (line_input, "ra-lifetime"))
2964         {
2965           if (!unformat (line_input, "%d", &ra_lifetime))
2966             {
2967               error = unformat_parse_error (line_input);
2968               goto done;
2969             }
2970           use_lifetime = 1;
2971           break;
2972         }
2973       else if (unformat (line_input, "ra-initial"))
2974         {
2975           if (!unformat
2976               (line_input, "%d %d", &ra_initial_count, &ra_initial_interval))
2977             {
2978               error = unformat_parse_error (line_input);
2979               goto done;
2980             }
2981           break;
2982         }
2983       else if (unformat (line_input, "ra-interval"))
2984         {
2985           if (!unformat (line_input, "%d", &ra_max_interval))
2986             {
2987               error = unformat_parse_error (line_input);
2988               goto done;
2989             }
2990
2991           if (!unformat (line_input, "%d", &ra_min_interval))
2992             ra_min_interval = 0;
2993           break;
2994         }
2995       else if (unformat (line_input, "ra-cease"))
2996         {
2997           cease = 1;
2998           break;
2999         }
3000       else
3001         {
3002           error = unformat_parse_error (line_input);
3003           goto done;
3004         }
3005     }
3006
3007   if (add_radv_info)
3008     {
3009       ip6_neighbor_ra_config (vm, sw_if_index,
3010                               suppress, managed, other,
3011                               suppress_ll_option, send_unicast, cease,
3012                               use_lifetime, ra_lifetime,
3013                               ra_initial_count, ra_initial_interval,
3014                               ra_max_interval, ra_min_interval, is_no);
3015     }
3016   else
3017     {
3018       u32 valid_lifetime_in_secs = 0;
3019       u32 pref_lifetime_in_secs = 0;
3020       u8 use_prefix_default_values = 0;
3021       u8 no_advertise = 0;
3022       u8 off_link = 0;
3023       u8 no_autoconfig = 0;
3024       u8 no_onlink = 0;
3025
3026       /* get the rest of the command */
3027       while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3028         {
3029           if (unformat (line_input, "default"))
3030             {
3031               use_prefix_default_values = 1;
3032               break;
3033             }
3034           else if (unformat (line_input, "infinite"))
3035             {
3036               valid_lifetime_in_secs = ~0;
3037               pref_lifetime_in_secs = ~0;
3038               break;
3039             }
3040           else if (unformat (line_input, "%d %d", &valid_lifetime_in_secs,
3041                              &pref_lifetime_in_secs))
3042             break;
3043           else
3044             break;
3045         }
3046
3047
3048       /* get the rest of the command */
3049       while (!use_prefix_default_values &&
3050              unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3051         {
3052           if (unformat (line_input, "no-advertise"))
3053             no_advertise = 1;
3054           else if (unformat (line_input, "off-link"))
3055             off_link = 1;
3056           else if (unformat (line_input, "no-autoconfig"))
3057             no_autoconfig = 1;
3058           else if (unformat (line_input, "no-onlink"))
3059             no_onlink = 1;
3060           else
3061             {
3062               error = unformat_parse_error (line_input);
3063               goto done;
3064             }
3065         }
3066
3067       ip6_neighbor_ra_prefix (vm, sw_if_index,
3068                               &ip6_addr, addr_len,
3069                               use_prefix_default_values,
3070                               valid_lifetime_in_secs,
3071                               pref_lifetime_in_secs,
3072                               no_advertise,
3073                               off_link, no_autoconfig, no_onlink, is_no);
3074     }
3075
3076 done:
3077   unformat_free (line_input);
3078
3079   return error;
3080 }
3081
3082 static void
3083 ip6_print_addrs (vlib_main_t * vm, u32 * addrs)
3084 {
3085   ip_lookup_main_t *lm = &ip6_main.lookup_main;
3086   u32 i;
3087
3088   for (i = 0; i < vec_len (addrs); i++)
3089     {
3090       ip_interface_address_t *a =
3091         pool_elt_at_index (lm->if_address_pool, addrs[i]);
3092       ip6_address_t *address = ip_interface_address_get_address (lm, a);
3093
3094       vlib_cli_output (vm, "\t\t%U/%d",
3095                        format_ip6_address, address, a->address_length);
3096     }
3097 }
3098
3099 static clib_error_t *
3100 show_ip6_interface_cmd (vlib_main_t * vm,
3101                         unformat_input_t * input, vlib_cli_command_t * cmd)
3102 {
3103   vnet_main_t *vnm = vnet_get_main ();
3104   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3105   clib_error_t *error = 0;
3106   u32 sw_if_index;
3107
3108   sw_if_index = ~0;
3109
3110   if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3111     {
3112       u32 ri;
3113
3114       /* look up the radv_t  information for this interface */
3115       vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3116                                sw_if_index, ~0);
3117
3118       ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3119
3120       if (ri != ~0)
3121         {
3122           ip_lookup_main_t *lm = &ip6_main.lookup_main;
3123           ip6_radv_t *radv_info;
3124           radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3125
3126           vlib_cli_output (vm, "%U is admin %s\n",
3127                            format_vnet_sw_interface_name, vnm,
3128                            vnet_get_sw_interface (vnm, sw_if_index),
3129                            (vnet_sw_interface_is_admin_up (vnm, sw_if_index) ?
3130                             "up" : "down"));
3131
3132           u32 ai;
3133           u32 *link_scope = 0, *global_scope = 0;
3134           u32 *local_scope = 0, *unknown_scope = 0;
3135           ip_interface_address_t *a;
3136
3137           vec_validate_init_empty (lm->if_address_pool_index_by_sw_if_index,
3138                                    sw_if_index, ~0);
3139           ai = lm->if_address_pool_index_by_sw_if_index[sw_if_index];
3140
3141           while (ai != (u32) ~ 0)
3142             {
3143               a = pool_elt_at_index (lm->if_address_pool, ai);
3144               ip6_address_t *address =
3145                 ip_interface_address_get_address (lm, a);
3146
3147               if (ip6_address_is_link_local_unicast (address))
3148                 vec_add1 (link_scope, ai);
3149               else if (ip6_address_is_global_unicast (address))
3150                 vec_add1 (global_scope, ai);
3151               else if (ip6_address_is_local_unicast (address))
3152                 vec_add1 (local_scope, ai);
3153               else
3154                 vec_add1 (unknown_scope, ai);
3155
3156               ai = a->next_this_sw_interface;
3157             }
3158
3159           if (vec_len (link_scope))
3160             {
3161               vlib_cli_output (vm, "\tLink-local address(es):\n");
3162               ip6_print_addrs (vm, link_scope);
3163               vec_free (link_scope);
3164             }
3165
3166           if (vec_len (local_scope))
3167             {
3168               vlib_cli_output (vm, "\tLocal unicast address(es):\n");
3169               ip6_print_addrs (vm, local_scope);
3170               vec_free (local_scope);
3171             }
3172
3173           if (vec_len (global_scope))
3174             {
3175               vlib_cli_output (vm, "\tGlobal unicast address(es):\n");
3176               ip6_print_addrs (vm, global_scope);
3177               vec_free (global_scope);
3178             }
3179
3180           if (vec_len (unknown_scope))
3181             {
3182               vlib_cli_output (vm, "\tOther-scope address(es):\n");
3183               ip6_print_addrs (vm, unknown_scope);
3184               vec_free (unknown_scope);
3185             }
3186
3187           vlib_cli_output (vm, "\tJoined group address(es):\n");
3188           ip6_mldp_group_t *m;
3189           /* *INDENT-OFF* */
3190           pool_foreach (m, radv_info->mldp_group_pool,
3191           ({
3192             vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
3193                              &m->mcast_address);
3194           }));
3195           /* *INDENT-ON* */
3196
3197           vlib_cli_output (vm, "\tAdvertised Prefixes:\n");
3198           ip6_radv_prefix_t *p;
3199           /* *INDENT-OFF* */
3200           pool_foreach (p, radv_info->adv_prefixes_pool,
3201           ({
3202             vlib_cli_output (vm, "\t\tprefix %U,  length %d\n",
3203                              format_ip6_address, &p->prefix, p->prefix_len);
3204           }));
3205           /* *INDENT-ON* */
3206
3207           vlib_cli_output (vm, "\tMTU is %d\n", radv_info->adv_link_mtu);
3208           vlib_cli_output (vm, "\tICMP error messages are unlimited\n");
3209           vlib_cli_output (vm, "\tICMP redirects are disabled\n");
3210           vlib_cli_output (vm, "\tICMP unreachables are not sent\n");
3211           vlib_cli_output (vm, "\tND DAD is disabled\n");
3212           //vlib_cli_output (vm, "\tND reachable time is %d milliseconds\n",);
3213           vlib_cli_output (vm, "\tND advertised reachable time is %d\n",
3214                            radv_info->adv_neighbor_reachable_time_in_msec);
3215           vlib_cli_output (vm,
3216                            "\tND advertised retransmit interval is %d (msec)\n",
3217                            radv_info->
3218                            adv_time_in_msec_between_retransmitted_neighbor_solicitations);
3219
3220           u32 ra_interval = radv_info->max_radv_interval;
3221           u32 ra_interval_min = radv_info->min_radv_interval;
3222           vlib_cli_output (vm,
3223                            "\tND router advertisements are sent every %d seconds (min interval is %d)\n",
3224                            ra_interval, ra_interval_min);
3225           vlib_cli_output (vm,
3226                            "\tND router advertisements live for %d seconds\n",
3227                            radv_info->adv_router_lifetime_in_sec);
3228           vlib_cli_output (vm,
3229                            "\tHosts %s stateless autoconfig for addresses\n",
3230                            (radv_info->adv_managed_flag) ? "use" :
3231                            " don't use");
3232           vlib_cli_output (vm, "\tND router advertisements sent %d\n",
3233                            radv_info->n_advertisements_sent);
3234           vlib_cli_output (vm, "\tND router solicitations received %d\n",
3235                            radv_info->n_solicitations_rcvd);
3236           vlib_cli_output (vm, "\tND router solicitations dropped %d\n",
3237                            radv_info->n_solicitations_dropped);
3238         }
3239       else
3240         {
3241           error = clib_error_return (0, "IPv6 not enabled on interface",
3242                                      format_unformat_error, input);
3243
3244         }
3245     }
3246   return error;
3247 }
3248
3249 /*?
3250  * This command is used to display various IPv6 attributes on a given
3251  * interface.
3252  *
3253  * @cliexpar
3254  * Example of how to display IPv6 settings:
3255  * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
3256  * GigabitEthernet2/0/0 is admin up
3257  *         Link-local address(es):
3258  *                 fe80::ab8/64
3259  *         Joined group address(es):
3260  *                 ff02::1
3261  *                 ff02::2
3262  *                 ff02::16
3263  *                 ff02::1:ff00:ab8
3264  *         Advertised Prefixes:
3265  *                 prefix fe80::fe:28ff:fe9c:75b3,  length 64
3266  *         MTU is 1500
3267  *         ICMP error messages are unlimited
3268  *         ICMP redirects are disabled
3269  *         ICMP unreachables are not sent
3270  *         ND DAD is disabled
3271  *         ND advertised reachable time is 0
3272  *         ND advertised retransmit interval is 0 (msec)
3273  *         ND router advertisements are sent every 200 seconds (min interval is 150)
3274  *         ND router advertisements live for 600 seconds
3275  *         Hosts use stateless autoconfig for addresses
3276  *         ND router advertisements sent 19336
3277  *         ND router solicitations received 0
3278  *         ND router solicitations dropped 0
3279  * @cliexend
3280  * Example of output if IPv6 is not enabled on the interface:
3281  * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
3282  * show ip6 interface: IPv6 not enabled on interface
3283  * @cliexend
3284 ?*/
3285 /* *INDENT-OFF* */
3286 VLIB_CLI_COMMAND (show_ip6_interface_command, static) =
3287 {
3288   .path = "show ip6 interface",
3289   .function = show_ip6_interface_cmd,
3290   .short_help = "show ip6 interface <interface>",
3291 };
3292 /* *INDENT-ON* */
3293
3294 clib_error_t *
3295 disable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
3296 {
3297   clib_error_t *error = 0;
3298   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3299   u32 ri;
3300
3301   /* look up the radv_t  information for this interface */
3302   vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3303                            ~0);
3304   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3305
3306   /* if not created - do nothing */
3307   if (ri != ~0)
3308     {
3309       vnet_main_t *vnm = vnet_get_main ();
3310       ip6_radv_t *radv_info;
3311
3312       radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3313
3314       /* check radv_info ref count for other ip6 addresses on this interface */
3315       /* This implicitly excludes the link local address */
3316       if (radv_info->ref_count == 0)
3317         {
3318           /* essentially "disables" ipv6 on this interface */
3319           error = ip6_add_del_interface_address (vm, sw_if_index,
3320                                                  &radv_info->
3321                                                  link_local_address, 128,
3322                                                  1 /* is_del */ );
3323
3324           ip6_neighbor_sw_interface_add_del (vnm, sw_if_index,
3325                                              0 /* is_add */ );
3326           ip6_mfib_interface_enable_disable (sw_if_index, 0);
3327         }
3328     }
3329   return error;
3330 }
3331
3332 int
3333 ip6_interface_enabled (vlib_main_t * vm, u32 sw_if_index)
3334 {
3335   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3336   u32 ri = ~0;
3337
3338   /* look up the radv_t  information for this interface */
3339   vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3340                            ~0);
3341
3342   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3343
3344   return ri != ~0;
3345 }
3346
3347 clib_error_t *
3348 enable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
3349 {
3350   clib_error_t *error = 0;
3351   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3352   u32 ri;
3353   int is_add = 1;
3354
3355   /* look up the radv_t  information for this interface */
3356   vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3357                            ~0);
3358
3359   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3360
3361   /* if not created yet */
3362   if (ri == ~0)
3363     {
3364       vnet_main_t *vnm = vnet_get_main ();
3365       vnet_sw_interface_t *sw_if0;
3366
3367       sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
3368       if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
3369         {
3370           ethernet_interface_t *eth_if0;
3371
3372           eth_if0 =
3373             ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
3374           if (eth_if0)
3375             {
3376               /* create radv_info. for this interface.  This holds all the info needed for router adverts */
3377               ri =
3378                 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, is_add);
3379
3380               if (ri != ~0)
3381                 {
3382                   ip6_radv_t *radv_info;
3383                   ip6_address_t link_local_address;
3384
3385                   radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3386
3387                   ip6_link_local_address_from_ethernet_mac_address
3388                     (&link_local_address, eth_if0->address);
3389
3390                   sw_if0 = vnet_get_sw_interface (vnm, sw_if_index);
3391                   if (sw_if0->type == VNET_SW_INTERFACE_TYPE_SUB)
3392                     {
3393                       /* make up  an interface id */
3394                       md5_context_t m;
3395                       u8 digest[16];
3396
3397                       link_local_address.as_u64[0] = radv_info->randomizer;
3398
3399                       md5_init (&m);
3400                       md5_add (&m, &link_local_address, 16);
3401                       md5_finish (&m, digest);
3402
3403                       clib_memcpy (&link_local_address, digest, 16);
3404
3405                       radv_info->randomizer = link_local_address.as_u64[0];
3406
3407                       link_local_address.as_u64[0] =
3408                         clib_host_to_net_u64 (0xFE80000000000000ULL);
3409                       /* clear u bit */
3410                       link_local_address.as_u8[8] &= 0xfd;
3411                     }
3412
3413                   ip6_mfib_interface_enable_disable (sw_if_index, 1);
3414
3415                   /* essentially "enables" ipv6 on this interface */
3416                   error = ip6_add_del_interface_address (vm, sw_if_index,
3417                                                          &link_local_address,
3418                                                          128
3419                                                          /* address width */ ,
3420                                                          0 /* is_del */ );
3421
3422                   if (error)
3423                     ip6_neighbor_sw_interface_add_del (vnm, sw_if_index,
3424                                                        !is_add);
3425                   else
3426                     {
3427                       radv_info->link_local_address = link_local_address;
3428                     }
3429                 }
3430             }
3431         }
3432     }
3433   return error;
3434 }
3435
3436 static clib_error_t *
3437 enable_ip6_interface_cmd (vlib_main_t * vm,
3438                           unformat_input_t * input, vlib_cli_command_t * cmd)
3439 {
3440   vnet_main_t *vnm = vnet_get_main ();
3441   clib_error_t *error = 0;
3442   u32 sw_if_index;
3443
3444   sw_if_index = ~0;
3445
3446   if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3447     {
3448       enable_ip6_interface (vm, sw_if_index);
3449     }
3450   else
3451     {
3452       error = clib_error_return (0, "unknown interface\n'",
3453                                  format_unformat_error, input);
3454
3455     }
3456   return error;
3457 }
3458
3459 /*?
3460  * This command is used to enable IPv6 on a given interface.
3461  *
3462  * @cliexpar
3463  * Example of how enable IPv6 on a given interface:
3464  * @cliexcmd{enable ip6 interface GigabitEthernet2/0/0}
3465 ?*/
3466 /* *INDENT-OFF* */
3467 VLIB_CLI_COMMAND (enable_ip6_interface_command, static) =
3468 {
3469   .path = "enable ip6 interface",
3470   .function = enable_ip6_interface_cmd,
3471   .short_help = "enable ip6 interface <interface>",
3472 };
3473 /* *INDENT-ON* */
3474
3475 static clib_error_t *
3476 disable_ip6_interface_cmd (vlib_main_t * vm,
3477                            unformat_input_t * input, vlib_cli_command_t * cmd)
3478 {
3479   vnet_main_t *vnm = vnet_get_main ();
3480   clib_error_t *error = 0;
3481   u32 sw_if_index;
3482
3483   sw_if_index = ~0;
3484
3485   if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3486     {
3487       error = disable_ip6_interface (vm, sw_if_index);
3488     }
3489   else
3490     {
3491       error = clib_error_return (0, "unknown interface\n'",
3492                                  format_unformat_error, input);
3493
3494     }
3495   return error;
3496 }
3497
3498 /*?
3499  * This command is used to disable IPv6 on a given interface.
3500  *
3501  * @cliexpar
3502  * Example of how disable IPv6 on a given interface:
3503  * @cliexcmd{disable ip6 interface GigabitEthernet2/0/0}
3504 ?*/
3505 /* *INDENT-OFF* */
3506 VLIB_CLI_COMMAND (disable_ip6_interface_command, static) =
3507 {
3508   .path = "disable ip6 interface",
3509   .function = disable_ip6_interface_cmd,
3510   .short_help = "disable ip6 interface <interface>",
3511 };
3512 /* *INDENT-ON* */
3513
3514 /*?
3515  * This command is used to configure the neighbor discovery
3516  * parameters on a given interface. Use the '<em>show ip6 interface</em>'
3517  * command to display some of the current neighbor discovery parameters
3518  * on a given interface. This command has three formats:
3519  *
3520  *
3521  * <b>Format 1 - Router Advertisement Options:</b> (Only one can be entered in a single command)
3522  *
3523  * '<em><b>ip6 nd <interface> [no] [ra-managed-config-flag] | [ra-other-config-flag] | [ra-suppress] | [ra-suppress-link-layer] | [ra-send-unicast] | [ra-lifetime <lifetime>] | [ra-initial <cnt> <interval>] | [ra-interval <max-interval> [<min-interval>]] | [ra-cease]</b></em>'
3524  *
3525  * Where:
3526  *
3527  * <em>[no] ra-managed-config-flag</em> - Advertises in ICMPv6
3528  * router-advertisement messages to use stateful address
3529  * auto-configuration to obtain address information (sets the M-bit).
3530  * Default is the M-bit is not set and the '<em>no</em>' option
3531  * returns it to this default state.
3532  *
3533  * <em>[no] ra-other-config-flag</em> - Indicates in ICMPv6
3534  * router-advertisement messages that hosts use stateful auto
3535  * configuration to obtain nonaddress related information (sets
3536  * the O-bit). Default is the O-bit is not set and the '<em>no</em>'
3537  * option returns it to this default state.
3538  *
3539  * <em>[no] ra-suppress</em> - Disables sending ICMPv6 router-advertisement
3540  * messages. The '<em>no</em>' option implies to enable sending ICMPv6
3541  * router-advertisement messages.
3542  *
3543  * <em>[no] ra-suppress-link-layer</em> - Indicates not to include the
3544  * optional source link-layer address in the ICMPv6 router-advertisement
3545  * messages. Default is to include the optional source link-layer address
3546  * and the '<em>no</em>' option returns it to this default state.
3547  *
3548  * <em>[no] ra-send-unicast</em> - Use the source address of the
3549  * router-solicitation message if availiable. The default is to use
3550  * multicast address of all nodes, and the '<em>no</em>' option returns
3551  * it to this default state.
3552  *
3553  * <em>[no] ra-lifetime <lifetime></em> - Advertises the lifetime of a
3554  * default router in ICMPv6 router-advertisement messages. The range is
3555  * from 0 to 9000 seconds. '<em><lifetime></em>' must be greater than
3556  * '<em><max-interval></em>'. The default value is 600 seconds and the
3557  * '<em>no</em>' option returns it to this default value.
3558  *
3559  * <em>[no] ra-initial <cnt> <interval></em> - Number of initial ICMPv6
3560  * router-advertisement messages sent and the interval between each
3561  * message. Range for count is 1 - 3 and default is 3. Range for interval
3562  * is 1 to 16 seconds, and default is 16 seconds. The '<em>no</em>' option
3563  * returns both to their default value.
3564  *
3565  * <em>[no] ra-interval <max-interval> [<min-interval>]</em> - Configures the
3566  * interval between sending ICMPv6 router-advertisement messages. The
3567  * range for max-interval is from 4 to 200 seconds. min-interval can not
3568  * be more than 75% of max-interval. If not set, min-interval will be
3569  * set to 75% of max-interval. The range for min-interval is from 3 to
3570  * 150 seconds.  The '<em>no</em>' option returns both to their default
3571  * value.
3572  *
3573  * <em>[no] ra-cease</em> - Cease sending ICMPv6 router-advertisement messages.
3574  * The '<em>no</em>' options implies to start (or restart) sending
3575  * ICMPv6 router-advertisement messages.
3576  *
3577  *
3578  * <b>Format 2 - Prefix Options:</b>
3579  *
3580  * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> [<valid-lifetime> <pref-lifetime> | infinite] [no-advertise] [off-link] [no-autoconfig] [no-onlink]</b></em>'
3581  *
3582  * Where:
3583  *
3584  * <em>no</em> - All additional flags are ignored and the prefix is deleted.
3585  *
3586  * <em><valid-lifetime> <pref-lifetime></em> - '<em><valid-lifetime></em>' is the
3587  * length of time in seconds during what the prefix is valid for the purpose of
3588  * on-link determination. Range is 7203 to 2592000 seconds and default is 2592000
3589  * seconds (30 days). '<em><pref-lifetime></em>' is the prefered-lifetime and is the
3590  * length of time in seconds during what addresses generated from the prefix remain
3591  * preferred. Range is 0 to 604800 seconds and default is 604800 seconds (7 days).
3592  *
3593  * <em>infinite</em> - Both '<em><valid-lifetime></em>' and '<em><<pref-lifetime></em>'
3594  * are inifinte, no timeout.
3595  *
3596  * <em>no-advertise</em> - Do not send full router address in prefix
3597  * advertisement. Default is to advertise (i.e. - This flag is off by default).
3598  *
3599  * <em>off-link</em> - Prefix is off-link, clear L-bit in packet. Default is on-link
3600  * (i.e. - This flag is off and L-bit in packet is set by default and this prefix can
3601  * be used for on-link determination). '<em>no-onlink</em>' also controls the L-bit.
3602  *
3603  * <em>no-autoconfig</em> - Do not use prefix for autoconfiguration, clear A-bit in packet.
3604  * Default is autoconfig (i.e. - This flag is off and A-bit in packet is set by default.
3605  *
3606  * <em>no-onlink</em> - Do not use prefix for onlink determination, clear L-bit in packet.
3607  * Default is on-link (i.e. - This flag is off and L-bit in packet is set by default and
3608  * this prefix can be used for on-link determination). '<em>off-link</em>' also controls
3609  * the L-bit.
3610  *
3611  *
3612  * <b>Format 3: - Default of Prefix:</b>
3613  *
3614  * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> default</b></em>'
3615  *
3616  * When a new prefix is added (or existing one is being overwritten) <em>default</em>
3617  * uses default values for the prefix. If <em>no</em> is used, the <em>default</em>
3618  * is ignored and the prefix is deleted.
3619  *
3620  *
3621  * @cliexpar
3622  * Example of how set a router advertisement option:
3623  * @cliexcmd{ip6 nd GigabitEthernet2/0/0 ra-interval 100 20}
3624  * Example of how to add a prefix:
3625  * @cliexcmd{ip6 nd GigabitEthernet2/0/0 prefix fe80::fe:28ff:fe9c:75b3/64 infinite no-advertise}
3626  * Example of how to delete a prefix:
3627  * @cliexcmd{ip6 nd GigabitEthernet2/0/0 no prefix fe80::fe:28ff:fe9c:75b3/64}
3628 ?*/
3629 /* *INDENT-OFF* */
3630 VLIB_CLI_COMMAND (ip6_nd_command, static) =
3631 {
3632   .path = "ip6 nd",
3633   .short_help = "ip6 nd <interface> ...",
3634   .function = ip6_neighbor_cmd,
3635 };
3636 /* *INDENT-ON* */
3637
3638 clib_error_t *
3639 set_ip6_link_local_address (vlib_main_t * vm,
3640                             u32 sw_if_index, ip6_address_t * address)
3641 {
3642   clib_error_t *error = 0;
3643   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3644   u32 ri;
3645   ip6_radv_t *radv_info;
3646   vnet_main_t *vnm = vnet_get_main ();
3647
3648   if (!ip6_address_is_link_local_unicast (address))
3649     {
3650       vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_LINK_LOCAL;
3651       return (error = clib_error_return (0, "address not link-local",
3652                                          format_unformat_error));
3653     }
3654
3655   /* call enable ipv6  */
3656   enable_ip6_interface (vm, sw_if_index);
3657
3658   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3659
3660   if (ri != ~0)
3661     {
3662       radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3663
3664       /* save if link local address (overwrite default) */
3665
3666       /* delete the old one */
3667       error = ip6_add_del_interface_address (vm, sw_if_index,
3668                                              &radv_info->link_local_address,
3669                                              128, 1 /* is_del */ );
3670
3671       if (!error)
3672         {
3673           /* add the new one */
3674           error = ip6_add_del_interface_address (vm, sw_if_index,
3675                                                  address, 128,
3676                                                  0 /* is_del */ );
3677
3678           if (!error)
3679             {
3680               radv_info->link_local_address = *address;
3681             }
3682         }
3683     }
3684   else
3685     {
3686       vnm->api_errno = VNET_API_ERROR_IP6_NOT_ENABLED;
3687       error = clib_error_return (0, "ip6 not enabled for interface",
3688                                  format_unformat_error);
3689     }
3690   return error;
3691 }
3692
3693 clib_error_t *
3694 set_ip6_link_local_address_cmd (vlib_main_t * vm,
3695                                 unformat_input_t * input,
3696                                 vlib_cli_command_t * cmd)
3697 {
3698   vnet_main_t *vnm = vnet_get_main ();
3699   clib_error_t *error = 0;
3700   u32 sw_if_index;
3701   ip6_address_t ip6_addr;
3702
3703   if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3704     {
3705       /* get the rest of the command */
3706       while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3707         {
3708           if (unformat (input, "%U", unformat_ip6_address, &ip6_addr))
3709             break;
3710           else
3711             return (unformat_parse_error (input));
3712         }
3713     }
3714   error = set_ip6_link_local_address (vm, sw_if_index, &ip6_addr);
3715   return error;
3716 }
3717
3718 /*?
3719  * This command is used to assign an IPv6 Link-local address to an
3720  * interface. This command will enable IPv6 on an interface if it
3721  * is not already enabled. Use the '<em>show ip6 interface</em>' command
3722  * to display the assigned Link-local address.
3723  *
3724  * @cliexpar
3725  * Example of how to assign an IPv6 Link-local address to an interface:
3726  * @cliexcmd{set ip6 link-local address GigabitEthernet2/0/0 FE80::AB8}
3727 ?*/
3728 /* *INDENT-OFF* */
3729 VLIB_CLI_COMMAND (set_ip6_link_local_address_command, static) =
3730 {
3731   .path = "set ip6 link-local address",
3732   .short_help = "set ip6 link-local address <interface> <ip6-address>",
3733   .function = set_ip6_link_local_address_cmd,
3734 };
3735 /* *INDENT-ON* */
3736
3737 /**
3738  * @brief callback when an interface address is added or deleted
3739  */
3740 static void
3741 ip6_neighbor_add_del_interface_address (ip6_main_t * im,
3742                                         uword opaque,
3743                                         u32 sw_if_index,
3744                                         ip6_address_t * address,
3745                                         u32 address_length,
3746                                         u32 if_address_index, u32 is_delete)
3747 {
3748   vnet_main_t *vnm = vnet_get_main ();
3749   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3750   u32 ri;
3751   vlib_main_t *vm = vnm->vlib_main;
3752   ip6_radv_t *radv_info;
3753   ip6_address_t a;
3754
3755   /* create solicited node multicast address for this interface adddress */
3756   ip6_set_solicited_node_multicast_address (&a, 0);
3757
3758   a.as_u8[0xd] = address->as_u8[0xd];
3759   a.as_u8[0xe] = address->as_u8[0xe];
3760   a.as_u8[0xf] = address->as_u8[0xf];
3761
3762   if (!is_delete)
3763     {
3764       /* try to  create radv_info - does nothing if ipv6 already enabled */
3765       enable_ip6_interface (vm, sw_if_index);
3766
3767       /* look up the radv_t  information for this interface */
3768       vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3769                                sw_if_index, ~0);
3770       ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3771       if (ri != ~0)
3772         {
3773           /* get radv_info */
3774           radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3775
3776           /* add address */
3777           if (!ip6_address_is_link_local_unicast (address))
3778             radv_info->ref_count++;
3779
3780           ip6_neighbor_add_mld_prefix (radv_info, &a);
3781         }
3782     }
3783   else
3784     {
3785
3786       /* delete */
3787       /* look up the radv_t  information for this interface */
3788       vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3789                                sw_if_index, ~0);
3790       ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3791
3792       if (ri != ~0)
3793         {
3794           /* get radv_info */
3795           radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3796
3797           ip6_neighbor_del_mld_prefix (radv_info, &a);
3798
3799           /* if interface up send MLDP "report" */
3800           radv_info->all_routers_mcast = 0;
3801
3802           /* add address */
3803           if (!ip6_address_is_link_local_unicast (address))
3804             radv_info->ref_count--;
3805         }
3806       /* Ensure that IPv6 is disabled, and LL removed after ref_count reaches 0 */
3807       disable_ip6_interface (vm, sw_if_index);
3808     }
3809 }
3810
3811 clib_error_t *
3812 ip6_set_neighbor_limit (u32 neighbor_limit)
3813 {
3814   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3815
3816   nm->limit_neighbor_cache_size = neighbor_limit;
3817   return 0;
3818 }
3819
3820 static clib_error_t *
3821 ip6_neighbor_init (vlib_main_t * vm)
3822 {
3823   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3824   ip6_main_t *im = &ip6_main;
3825
3826   mhash_init (&nm->neighbor_index_by_key,
3827               /* value size */ sizeof (uword),
3828               /* key size */ sizeof (ip6_neighbor_key_t));
3829
3830   icmp6_register_type (vm, ICMP6_neighbor_solicitation,
3831                        ip6_icmp_neighbor_solicitation_node.index);
3832   icmp6_register_type (vm, ICMP6_neighbor_advertisement,
3833                        ip6_icmp_neighbor_advertisement_node.index);
3834   icmp6_register_type (vm, ICMP6_router_solicitation,
3835                        ip6_icmp_router_solicitation_node.index);
3836   icmp6_register_type (vm, ICMP6_router_advertisement,
3837                        ip6_icmp_router_advertisement_node.index);
3838
3839   /* handler node for ip6 neighbor discovery events and timers */
3840   vlib_register_node (vm, &ip6_icmp_neighbor_discovery_event_node);
3841
3842   /* add call backs */
3843   ip6_add_del_interface_address_callback_t cb;
3844   memset (&cb, 0x0, sizeof (ip6_add_del_interface_address_callback_t));
3845
3846   /* when an interface address changes... */
3847   cb.function = ip6_neighbor_add_del_interface_address;
3848   cb.function_opaque = 0;
3849   vec_add1 (im->add_del_interface_address_callbacks, cb);
3850
3851   mhash_init (&nm->pending_resolutions_by_address,
3852               /* value size */ sizeof (uword),
3853               /* key size */ sizeof (ip6_address_t));
3854
3855   mhash_init (&nm->mac_changes_by_address,
3856               /* value size */ sizeof (uword),
3857               /* key size */ sizeof (ip6_address_t));
3858
3859   /* default, configurable */
3860   nm->limit_neighbor_cache_size = 50000;
3861
3862 #if 0
3863   /* $$$$ Hack fix for today */
3864   vec_validate_init_empty
3865     (im->discover_neighbor_next_index_by_hw_if_index, 32, 0 /* drop */ );
3866 #endif
3867
3868   return 0;
3869 }
3870
3871 VLIB_INIT_FUNCTION (ip6_neighbor_init);
3872
3873
3874 void
3875 vnet_register_ip6_neighbor_resolution_event (vnet_main_t * vnm,
3876                                              void *address_arg,
3877                                              uword node_index,
3878                                              uword type_opaque, uword data)
3879 {
3880   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3881   ip6_address_t *address = address_arg;
3882   uword *p;
3883   pending_resolution_t *pr;
3884
3885   pool_get (nm->pending_resolutions, pr);
3886
3887   pr->next_index = ~0;
3888   pr->node_index = node_index;
3889   pr->type_opaque = type_opaque;
3890   pr->data = data;
3891
3892   p = mhash_get (&nm->pending_resolutions_by_address, address);
3893   if (p)
3894     {
3895       /* Insert new resolution at the head of the list */
3896       pr->next_index = p[0];
3897       mhash_unset (&nm->pending_resolutions_by_address, address, 0);
3898     }
3899
3900   mhash_set (&nm->pending_resolutions_by_address, address,
3901              pr - nm->pending_resolutions, 0 /* old value */ );
3902 }
3903
3904 int
3905 vnet_add_del_ip6_nd_change_event (vnet_main_t * vnm,
3906                                   void *data_callback,
3907                                   u32 pid,
3908                                   void *address_arg,
3909                                   uword node_index,
3910                                   uword type_opaque, uword data, int is_add)
3911 {
3912   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3913   ip6_address_t *address = address_arg;
3914
3915   /* Try to find an existing entry */
3916   u32 *first = (u32 *) mhash_get (&nm->mac_changes_by_address, address);
3917   u32 *p = first;
3918   pending_resolution_t *mc;
3919   while (p && *p != ~0)
3920     {
3921       mc = pool_elt_at_index (nm->mac_changes, *p);
3922       if (mc->node_index == node_index && mc->type_opaque == type_opaque
3923           && mc->pid == pid)
3924         break;
3925       p = &mc->next_index;
3926     }
3927
3928   int found = p && *p != ~0;
3929   if (is_add)
3930     {
3931       if (found)
3932         return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
3933
3934       pool_get (nm->mac_changes, mc);
3935       *mc = (pending_resolution_t)
3936       {
3937       .next_index = ~0,.node_index = node_index,.type_opaque =
3938           type_opaque,.data = data,.data_callback = data_callback,.pid =
3939           pid,};
3940
3941       /* Insert new resolution at the end of the list */
3942       u32 new_idx = mc - nm->mac_changes;
3943       if (p)
3944         p[0] = new_idx;
3945       else
3946         mhash_set (&nm->mac_changes_by_address, address, new_idx, 0);
3947     }
3948   else
3949     {
3950       if (!found)
3951         return VNET_API_ERROR_NO_SUCH_ENTRY;
3952
3953       /* Clients may need to clean up pool entries, too */
3954       void (*fp) (u32, u8 *) = data_callback;
3955       if (fp)
3956         (*fp) (mc->data, 0 /* no new mac addrs */ );
3957
3958       /* Remove the entry from the list and delete the entry */
3959       *p = mc->next_index;
3960       pool_put (nm->mac_changes, mc);
3961
3962       /* Remove from hash if we deleted the last entry */
3963       if (*p == ~0 && p == first)
3964         mhash_unset (&nm->mac_changes_by_address, address, 0);
3965     }
3966   return 0;
3967 }
3968
3969 int
3970 vnet_ip6_nd_term (vlib_main_t * vm,
3971                   vlib_node_runtime_t * node,
3972                   vlib_buffer_t * p0,
3973                   ethernet_header_t * eth,
3974                   ip6_header_t * ip, u32 sw_if_index, u16 bd_index)
3975 {
3976   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3977   icmp6_neighbor_solicitation_or_advertisement_header_t *ndh;
3978   pending_resolution_t *mc;
3979
3980   ndh = ip6_next_header (ip);
3981   if (ndh->icmp.type != ICMP6_neighbor_solicitation &&
3982       ndh->icmp.type != ICMP6_neighbor_advertisement)
3983     return 0;
3984
3985   if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
3986                      (p0->flags & VLIB_BUFFER_IS_TRACED)))
3987     {
3988       u8 *t0 = vlib_add_trace (vm, node, p0,
3989                                sizeof (icmp6_input_trace_t));
3990       clib_memcpy (t0, ip, sizeof (icmp6_input_trace_t));
3991     }
3992
3993   /* Check if anyone want ND events for L2 BDs */
3994   uword *p = mhash_get (&nm->mac_changes_by_address, &ip6a_zero);
3995   if (p && !ip6_address_is_link_local_unicast (&ip->src_address))
3996     {
3997       u32 next_index = p[0];
3998       while (next_index != (u32) ~ 0)
3999         {
4000           int (*fp) (u32, u8 *, u32, ip6_address_t *);
4001           int rv = 1;
4002           mc = pool_elt_at_index (nm->mac_changes, next_index);
4003           fp = mc->data_callback;
4004           /* Call the callback, return 1 to suppress dup events */
4005           if (fp)
4006             rv = (*fp) (mc->data,
4007                         eth->src_address, sw_if_index, &ip->src_address);
4008           /* Signal the resolver process */
4009           if (rv == 0)
4010             vlib_process_signal_event (vm, mc->node_index,
4011                                        mc->type_opaque, mc->data);
4012           next_index = mc->next_index;
4013         }
4014     }
4015
4016   /* Check if MAC entry exsist for solicited target IP */
4017   if (ndh->icmp.type == ICMP6_neighbor_solicitation)
4018     {
4019       icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *opt;
4020       l2_bridge_domain_t *bd_config;
4021       u8 *macp;
4022
4023       opt = (void *) (ndh + 1);
4024       if ((opt->header.type !=
4025            ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address) ||
4026           (opt->header.n_data_u64s != 1))
4027         return 0;               /* source link layer address option not present */
4028
4029       bd_config = vec_elt_at_index (l2input_main.bd_configs, bd_index);
4030       macp =
4031         (u8 *) hash_get_mem (bd_config->mac_by_ip6, &ndh->target_address);
4032       if (macp)
4033         {                       /* found ip-mac entry, generate eighbor advertisement response */
4034           int bogus_length;
4035           vlib_node_runtime_t *error_node =
4036             vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
4037           ip->dst_address = ip->src_address;
4038           ip->src_address = ndh->target_address;
4039           ip->hop_limit = 255;
4040           opt->header.type =
4041             ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
4042           clib_memcpy (opt->ethernet_address, macp, 6);
4043           ndh->icmp.type = ICMP6_neighbor_advertisement;
4044           ndh->advertisement_flags = clib_host_to_net_u32
4045             (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED |
4046              ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
4047           ndh->icmp.checksum = 0;
4048           ndh->icmp.checksum =
4049             ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip, &bogus_length);
4050           clib_memcpy (eth->dst_address, eth->src_address, 6);
4051           clib_memcpy (eth->src_address, macp, 6);
4052           vlib_error_count (vm, error_node->node_index,
4053                             ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX, 1);
4054           return 1;
4055         }
4056     }
4057
4058   return 0;
4059
4060 }
4061
4062 int
4063 ip6_neighbor_proxy_add_del (u32 sw_if_index, ip6_address_t * addr, u8 is_del)
4064 {
4065   u32 fib_index;
4066
4067   fib_prefix_t pfx = {
4068     .fp_len = 128,
4069     .fp_proto = FIB_PROTOCOL_IP6,
4070     .fp_addr = {
4071                 .ip6 = *addr,
4072                 },
4073   };
4074   ip46_address_t nh = {
4075     .ip6 = *addr,
4076   };
4077
4078   fib_index = ip6_fib_table_get_index_for_sw_if_index (sw_if_index);
4079
4080   if (~0 == fib_index)
4081     return VNET_API_ERROR_NO_SUCH_FIB;
4082
4083   if (is_del)
4084     {
4085       fib_table_entry_path_remove (fib_index,
4086                                    &pfx,
4087                                    FIB_SOURCE_IP6_ND_PROXY,
4088                                    FIB_PROTOCOL_IP6,
4089                                    &nh,
4090                                    sw_if_index,
4091                                    ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
4092       /* flush the ND cache of this address if it's there */
4093       vnet_unset_ip6_ethernet_neighbor (vlib_get_main (),
4094                                         sw_if_index, addr, NULL, 0);
4095     }
4096   else
4097     {
4098       fib_table_entry_path_add (fib_index,
4099                                 &pfx,
4100                                 FIB_SOURCE_IP6_ND_PROXY,
4101                                 FIB_ENTRY_FLAG_NONE,
4102                                 FIB_PROTOCOL_IP6,
4103                                 &nh,
4104                                 sw_if_index,
4105                                 ~0, 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
4106     }
4107   return (0);
4108 }
4109
4110 static clib_error_t *
4111 set_ip6_nd_proxy_cmd (vlib_main_t * vm,
4112                       unformat_input_t * input, vlib_cli_command_t * cmd)
4113 {
4114   vnet_main_t *vnm = vnet_get_main ();
4115   clib_error_t *error = 0;
4116   ip6_address_t addr;
4117   u32 sw_if_index;
4118   u8 is_del = 0;
4119
4120   if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4121     {
4122       /* get the rest of the command */
4123       while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
4124         {
4125           if (unformat (input, "%U", unformat_ip6_address, &addr))
4126             break;
4127           else if (unformat (input, "delete") || unformat (input, "del"))
4128             is_del = 1;
4129           else
4130             return (unformat_parse_error (input));
4131         }
4132     }
4133
4134   ip6_neighbor_proxy_add_del (sw_if_index, &addr, is_del);
4135
4136   return error;
4137 }
4138
4139 /* *INDENT-OFF* */
4140 VLIB_CLI_COMMAND (set_ip6_nd_proxy_command, static) =
4141 {
4142   .path = "set ip6 nd proxy",
4143   .short_help = "set ip6 nd proxy <HOST> <INTERFACE>",
4144   .function = set_ip6_nd_proxy_cmd,
4145 };
4146 /* *INDENT-ON* */
4147
4148 void
4149 ethernet_ndp_change_mac (u32 sw_if_index)
4150 {
4151   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4152   ip6_neighbor_t *n;
4153
4154   /* *INDENT-OFF* */
4155   pool_foreach (n, nm->neighbor_pool,
4156   ({
4157     if (n->key.sw_if_index == sw_if_index)
4158       {
4159         adj_nbr_walk_nh6 (sw_if_index,
4160                           &n->key.ip6_address,
4161                           ip6_nd_mk_complete_walk, n);
4162       }
4163   }));
4164   /* *INDENT-ON* */
4165 }
4166
4167 /*
4168  * fd.io coding-style-patch-verification: ON
4169  *
4170  * Local Variables:
4171  * eval: (c-set-style "gnu")
4172  * End:
4173  */