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