src/vnet/ip/ip6_neighbor.c

   1 /*
   2  * ip/ip6_neighbor.c: IP6 neighbor handling
   3  *
   4  * Copyright (c) 2010 Cisco and/or its affiliates.
   5  * Licensed under the Apache License, Version 2.0 (the "License");
   6  * you may not use this file except in compliance with the License.
   7  * You may obtain a copy of the License at:
   8  *
   9  *     http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  * Unless required by applicable law or agreed to in writing, software
  12  * distributed under the License is distributed on an "AS IS" BASIS,
  13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  * See the License for the specific language governing permissions and
  15  * limitations under the License.
  16  */
  17
  18 #include <vnet/ip/ip.h>
  19 #include <vnet/ip/ip6_neighbor.h>
  20 #include <vnet/ethernet/ethernet.h>
  21 #include <vppinfra/mhash.h>
  22 #include <vppinfra/md5.h>
  23 #include <vnet/adj/adj.h>
  24 #include <vnet/adj/adj_mcast.h>
  25 #include <vnet/fib/fib_table.h>
  26 #include <vnet/fib/ip6_fib.h>
  27 #include <vnet/mfib/ip6_mfib.h>
  28
  29 /**
  30  * @file
  31  * @brief IPv6 Neighbor Adjacency and Neighbor Discovery.
  32  *
  33  * The files contains the API and CLI code for managing IPv6 neighbor
  34  * adjacency tables and neighbor discovery logic.
  35  */
  36
  37 /* can't use sizeof link_layer_address, that's 8 */
  38 #define ETHER_MAC_ADDR_LEN 6
  39
  40 /* advertised prefix option */
  41 typedef struct
  42 {
  43   /* basic advertised information */
  44   ip6_address_t prefix;
  45   u8 prefix_len;
  46   int adv_on_link_flag;
  47   int adv_autonomous_flag;
  48   u32 adv_valid_lifetime_in_secs;
  49   u32 adv_pref_lifetime_in_secs;
  50
  51   /* advertised values are computed from these times if decrementing */
  52   f64 valid_lifetime_expires;
  53   f64 pref_lifetime_expires;
  54
  55   /* local information */
  56   int enabled;
  57   int deprecated_prefix_flag;
  58   int decrement_lifetime_flag;
  59
  60 #define MIN_ADV_VALID_LIFETIME 7203     /* seconds */
  61 #define DEF_ADV_VALID_LIFETIME  2592000
  62 #define DEF_ADV_PREF_LIFETIME 604800
  63
  64   /* extensions are added here, mobile, DNS etc.. */
  65 } ip6_radv_prefix_t;
  66
  67
  68 typedef struct
  69 {
  70   /* group information */
  71   u8 type;
  72   ip6_address_t mcast_address;
  73   u16 num_sources;
  74   ip6_address_t *mcast_source_address_pool;
  75 } ip6_mldp_group_t;
  76
  77 /* configured router advertisement information per ipv6 interface */
  78 typedef struct
  79 {
  80
  81   /* advertised config information, zero means unspecified  */
  82   u8 curr_hop_limit;
  83   int adv_managed_flag;
  84   int adv_other_flag;
  85   u16 adv_router_lifetime_in_sec;
  86   u32 adv_neighbor_reachable_time_in_msec;
  87   u32 adv_time_in_msec_between_retransmitted_neighbor_solicitations;
  88
  89   /* mtu option */
  90   u32 adv_link_mtu;
  91
  92   /* source link layer option */
  93   u8 link_layer_address[8];
  94   u8 link_layer_addr_len;
  95
  96   /* prefix option */
  97   ip6_radv_prefix_t *adv_prefixes_pool;
  98
  99   /* Hash table mapping address to index in interface advertised  prefix pool. */
 100   mhash_t address_to_prefix_index;
 101
 102   /* MLDP  group information */
 103   ip6_mldp_group_t *mldp_group_pool;
 104
 105   /* Hash table mapping address to index in mldp address pool. */
 106   mhash_t address_to_mldp_index;
 107
 108   /* local information */
 109   u32 sw_if_index;
 110   int send_radv;                /* radv on/off on this interface -  set by config */
 111   int cease_radv;               /* we are ceasing  to send  - set byf config */
 112   int send_unicast;
 113   int adv_link_layer_address;
 114   int prefix_option;
 115   int failed_device_check;
 116   int all_routers_mcast;
 117   u32 seed;
 118   u64 randomizer;
 119   int ref_count;
 120   adj_index_t mcast_adj_index;
 121
 122   /* timing information */
 123 #define DEF_MAX_RADV_INTERVAL 200
 124 #define DEF_MIN_RADV_INTERVAL .75 * DEF_MAX_RADV_INTERVAL
 125 #define DEF_CURR_HOP_LIMIT  64
 126 #define DEF_DEF_RTR_LIFETIME   3 * DEF_MAX_RADV_INTERVAL
 127 #define MAX_DEF_RTR_LIFETIME   9000
 128
 129 #define MAX_INITIAL_RTR_ADVERT_INTERVAL   16    /* seconds */
 130 #define MAX_INITIAL_RTR_ADVERTISEMENTS        3 /*transmissions */
 131 #define MIN_DELAY_BETWEEN_RAS                              3    /* seconds */
 132 #define MAX_DELAY_BETWEEN_RAS                    1800   /* seconds */
 133 #define MAX_RA_DELAY_TIME                                          .5   /* seconds */
 134
 135   f64 max_radv_interval;
 136   f64 min_radv_interval;
 137   f64 min_delay_between_radv;
 138   f64 max_delay_between_radv;
 139   f64 max_rtr_default_lifetime;
 140
 141   f64 last_radv_time;
 142   f64 last_multicast_time;
 143   f64 next_multicast_time;
 144
 145
 146   u32 initial_adverts_count;
 147   f64 initial_adverts_interval;
 148   u32 initial_adverts_sent;
 149
 150   /* stats */
 151   u32 n_advertisements_sent;
 152   u32 n_solicitations_rcvd;
 153   u32 n_solicitations_dropped;
 154
 155   /* Link local address to use (defaults to underlying physical for logical interfaces */
 156   ip6_address_t link_local_address;
 157 } ip6_radv_t;
 158
 159 typedef struct
 160 {
 161   u32 next_index;
 162   uword node_index;
 163   uword type_opaque;
 164   uword data;
 165   /* Used for nd event notification only */
 166   void *data_callback;
 167   u32 pid;
 168 } pending_resolution_t;
 169
 170
 171 typedef struct
 172 {
 173   /* Hash tables mapping name to opcode. */
 174   uword *opcode_by_name;
 175
 176   /* lite beer "glean" adjacency handling */
 177   mhash_t pending_resolutions_by_address;
 178   pending_resolution_t *pending_resolutions;
 179
 180   /* Mac address change notification */
 181   mhash_t mac_changes_by_address;
 182   pending_resolution_t *mac_changes;
 183
 184   u32 *neighbor_input_next_index_by_hw_if_index;
 185
 186   ip6_neighbor_t *neighbor_pool;
 187
 188   mhash_t neighbor_index_by_key;
 189
 190   u32 *if_radv_pool_index_by_sw_if_index;
 191
 192   ip6_radv_t *if_radv_pool;
 193
 194   /* Neighbor attack mitigation */
 195   u32 limit_neighbor_cache_size;
 196   u32 neighbor_delete_rotor;
 197
 198 } ip6_neighbor_main_t;
 199
 200 /* ipv6 neighbor discovery - timer/event types */
 201 typedef enum
 202 {
 203   ICMP6_ND_EVENT_INIT,
 204 } ip6_icmp_neighbor_discovery_event_type_t;
 205
 206 typedef union
 207 {
 208   u32 add_del_swindex;
 209   struct
 210   {
 211     u32 up_down_swindex;
 212     u32 fib_index;
 213   } up_down_event;
 214 } ip6_icmp_neighbor_discovery_event_data_t;
 215
 216 static ip6_neighbor_main_t ip6_neighbor_main;
 217 static ip6_address_t ip6a_zero; /* ip6 address 0 */
 218
 219 static u8 *
 220 format_ip6_neighbor_ip6_entry (u8 * s, va_list * va)
 221 {
 222   vlib_main_t *vm = va_arg (*va, vlib_main_t *);
 223   ip6_neighbor_t *n = va_arg (*va, ip6_neighbor_t *);
 224   vnet_main_t *vnm = vnet_get_main ();
 225   vnet_sw_interface_t *si;
 226   u8 *flags = 0;
 227
 228   if (!n)
 229     return format (s, "%=12s%=20s%=6s%=20s%=40s", "Time", "Address", "Flags",
 230                    "Link layer", "Interface");
 231
 232   if (n->flags & IP6_NEIGHBOR_FLAG_DYNAMIC)
 233     flags = format (flags, "D");
 234
 235   if (n->flags & IP6_NEIGHBOR_FLAG_STATIC)
 236     flags = format (flags, "S");
 237
 238   if (n->flags & IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY)
 239     flags = format (flags, "N");
 240
 241   si = vnet_get_sw_interface (vnm, n->key.sw_if_index);
 242   s = format (s, "%=12U%=20U%=6s%=20U%=40U",
 243               format_vlib_cpu_time, vm, n->cpu_time_last_updated,
 244               format_ip6_address, &n->key.ip6_address,
 245               flags ? (char *) flags : "",
 246               format_ethernet_address, n->link_layer_address,
 247               format_vnet_sw_interface_name, vnm, si);
 248
 249   vec_free (flags);
 250   return s;
 251 }
 252
 253 static clib_error_t *
 254 ip6_neighbor_sw_interface_up_down (vnet_main_t * vnm,
 255                                    u32 sw_if_index, u32 flags)
 256 {
 257   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
 258   ip6_neighbor_t *n;
 259
 260   if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
 261     {
 262       u32 i, *to_delete = 0;
 263
 264       /* *INDENT-OFF* */
 265       pool_foreach (n, nm->neighbor_pool,
 266       ({
 267         if (n->key.sw_if_index == sw_if_index)
 268           vec_add1 (to_delete, n - nm->neighbor_pool);
 269       }));
 270       /* *INDENT-ON* */
 271
 272       for (i = 0; i < vec_len (to_delete); i++)
 273         {
 274           n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
 275           mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
 276           fib_table_entry_delete_index (n->fib_entry_index, FIB_SOURCE_ADJ);
 277           pool_put (nm->neighbor_pool, n);
 278         }
 279
 280       vec_free (to_delete);
 281     }
 282
 283   return 0;
 284 }
 285
 286 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_neighbor_sw_interface_up_down);
 287
 288 static void
 289 unset_random_neighbor_entry (void)
 290 {
 291   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
 292   vnet_main_t *vnm = vnet_get_main ();
 293   vlib_main_t *vm = vnm->vlib_main;
 294   ip6_neighbor_t *e;
 295   u32 index;
 296
 297   index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
 298   nm->neighbor_delete_rotor = index;
 299
 300   /* Try again from elt 0, could happen if an intfc goes down */
 301   if (index == ~0)
 302     {
 303       index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
 304       nm->neighbor_delete_rotor = index;
 305     }
 306
 307   /* Nothing left in the pool */
 308   if (index == ~0)
 309     return;
 310
 311   e = pool_elt_at_index (nm->neighbor_pool, index);
 312
 313   vnet_unset_ip6_ethernet_neighbor (vm, e->key.sw_if_index,
 314                                     &e->key.ip6_address,
 315                                     e->link_layer_address,
 316                                     ETHER_MAC_ADDR_LEN);
 317 }
 318
 319 typedef struct
 320 {
 321   u8 is_add;
 322   u8 is_static;
 323   u8 is_no_fib_entry;
 324   u8 link_layer_address[6];
 325   u32 sw_if_index;
 326   ip6_address_t addr;
 327 } ip6_neighbor_set_unset_rpc_args_t;
 328
 329 static void ip6_neighbor_set_unset_rpc_callback
 330   (ip6_neighbor_set_unset_rpc_args_t * a);
 331
 332 static void set_unset_ip6_neighbor_rpc
 333   (vlib_main_t * vm,
 334    u32 sw_if_index,
 335    ip6_address_t * a, u8 * link_layer_address, int is_add, int is_static,
 336    int is_no_fib_entry)
 337 {
 338   ip6_neighbor_set_unset_rpc_args_t args;
 339   void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
 340
 341   args.sw_if_index = sw_if_index;
 342   args.is_add = is_add;
 343   args.is_static = is_static;
 344   args.is_no_fib_entry = is_no_fib_entry;
 345   clib_memcpy (&args.addr, a, sizeof (*a));
 346   if (NULL != link_layer_address)
 347     clib_memcpy (args.link_layer_address, link_layer_address, 6);
 348
 349   vl_api_rpc_call_main_thread (ip6_neighbor_set_unset_rpc_callback,
 350                                (u8 *) & args, sizeof (args));
 351 }
 352
 353 static void
 354 ip6_nbr_probe (ip_adjacency_t * adj)
 355 {
 356   icmp6_neighbor_solicitation_header_t *h;
 357   vnet_main_t *vnm = vnet_get_main ();
 358   ip6_main_t *im = &ip6_main;
 359   ip_interface_address_t *ia;
 360   ip6_address_t *dst, *src;
 361   vnet_hw_interface_t *hi;
 362   vnet_sw_interface_t *si;
 363   vlib_buffer_t *b;
 364   int bogus_length;
 365   vlib_main_t *vm;
 366   u32 bi = 0;
 367
 368   vm = vlib_get_main ();
 369
 370   si = vnet_get_sw_interface (vnm, adj->rewrite_header.sw_if_index);
 371   dst = &adj->sub_type.nbr.next_hop.ip6;
 372
 373   if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
 374     {
 375       return;
 376     }
 377   src = ip6_interface_address_matching_destination (im, dst,
 378                                                     adj->rewrite_header.
 379                                                     sw_if_index, &ia);
 380   if (!src)
 381     {
 382       return;
 383     }
 384
 385   h = vlib_packet_template_get_packet (vm,
 386                                        &im->discover_neighbor_packet_template,
 387                                        &bi);
 388
 389   hi = vnet_get_sup_hw_interface (vnm, adj->rewrite_header.sw_if_index);
 390
 391   h->ip.dst_address.as_u8[13] = dst->as_u8[13];
 392   h->ip.dst_address.as_u8[14] = dst->as_u8[14];
 393   h->ip.dst_address.as_u8[15] = dst->as_u8[15];
 394   h->ip.src_address = src[0];
 395   h->neighbor.target_address = dst[0];
 396
 397   clib_memcpy (h->link_layer_option.ethernet_address,
 398                hi->hw_address, vec_len (hi->hw_address));
 399
 400   h->neighbor.icmp.checksum =
 401     ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
 402   ASSERT (bogus_length == 0);
 403
 404   b = vlib_get_buffer (vm, bi);
 405   vnet_buffer (b)->sw_if_index[VLIB_RX] =
 406     vnet_buffer (b)->sw_if_index[VLIB_TX] = adj->rewrite_header.sw_if_index;
 407
 408   /* Add encapsulation string for software interface (e.g. ethernet header). */
 409   vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
 410   vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
 411
 412   {
 413     vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
 414     u32 *to_next = vlib_frame_vector_args (f);
 415     to_next[0] = bi;
 416     f->n_vectors = 1;
 417     vlib_put_frame_to_node (vm, hi->output_node_index, f);
 418   }
 419 }
 420
 421 static void
 422 ip6_nd_mk_complete (adj_index_t ai, ip6_neighbor_t * nbr)
 423 {
 424   adj_nbr_update_rewrite (ai, ADJ_NBR_REWRITE_FLAG_COMPLETE,
 425                           ethernet_build_rewrite (vnet_get_main (),
 426                                                   nbr->key.sw_if_index,
 427                                                   adj_get_link_type (ai),
 428                                                   nbr->link_layer_address));
 429 }
 430
 431 static void
 432 ip6_nd_mk_incomplete (adj_index_t ai)
 433 {
 434   ip_adjacency_t *adj = adj_get (ai);
 435
 436   adj_nbr_update_rewrite (ai,
 437                           ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
 438                           ethernet_build_rewrite (vnet_get_main (),
 439                                                   adj->rewrite_header.
 440                                                   sw_if_index,
 441                                                   adj_get_link_type (ai),
 442                                                   VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
 443 }
 444
 445 #define IP6_NBR_MK_KEY(k, sw_if_index, addr) \
 446 {                                            \
 447     k.sw_if_index = sw_if_index;             \
 448     k.ip6_address = *addr;                   \
 449     k.pad = 0;                               \
 450 }
 451
 452 static ip6_neighbor_t *
 453 ip6_nd_find (u32 sw_if_index, const ip6_address_t * addr)
 454 {
 455   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
 456   ip6_neighbor_t *n = NULL;
 457   ip6_neighbor_key_t k;
 458   uword *p;
 459
 460   IP6_NBR_MK_KEY (k, sw_if_index, addr);
 461
 462   p = mhash_get (&nm->neighbor_index_by_key, &k);
 463   if (p)
 464     {
 465       n = pool_elt_at_index (nm->neighbor_pool, p[0]);
 466     }
 467
 468   return (n);
 469 }
 470
 471 static adj_walk_rc_t
 472 ip6_nd_mk_complete_walk (adj_index_t ai, void *ctx)
 473 {
 474   ip6_neighbor_t *nbr = ctx;
 475
 476   ip6_nd_mk_complete (ai, nbr);
 477
 478   return (ADJ_WALK_RC_CONTINUE);
 479 }
 480
 481 static adj_walk_rc_t
 482 ip6_nd_mk_incomplete_walk (adj_index_t ai, void *ctx)
 483 {
 484   ip6_nd_mk_incomplete (ai);
 485
 486   return (ADJ_WALK_RC_CONTINUE);
 487 }
 488
 489 void
 490 ip6_ethernet_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
 491 {
 492   ip6_neighbor_t *nbr;
 493   ip_adjacency_t *adj;
 494
 495   adj = adj_get (ai);
 496
 497   nbr = ip6_nd_find (sw_if_index, &adj->sub_type.nbr.next_hop.ip6);
 498
 499   switch (adj->lookup_next_index)
 500     {
 501     case IP_LOOKUP_NEXT_ARP:
 502     case IP_LOOKUP_NEXT_GLEAN:
 503       if (NULL != nbr)
 504         {
 505           adj_nbr_walk_nh6 (sw_if_index, &nbr->key.ip6_address,
 506                             ip6_nd_mk_complete_walk, nbr);
 507         }
 508       else
 509         {
 510           /*
 511            * no matching ND entry.
 512            * construct the rewrite required to for an ND packet, and stick
 513            * that in the adj's pipe to smoke.
 514            */
 515           adj_nbr_update_rewrite (ai,
 516                                   ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
 517                                   ethernet_build_rewrite (vnm,
 518                                                           sw_if_index,
 519                                                           VNET_LINK_IP6,
 520                                                           VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
 521
 522           /*
 523            * since the FIB has added this adj for a route, it makes sense it may
 524            * want to forward traffic sometime soon. Let's send a speculative ND.
 525            * just one. If we were to do periodically that wouldn't be bad either,
 526            * but that's more code than i'm prepared to write at this time for
 527            * relatively little reward.
 528            */
 529           ip6_nbr_probe (adj);
 530         }
 531       break;
 532     case IP_LOOKUP_NEXT_MCAST:
 533       {
 534         /*
 535          * Construct a partial rewrite from the known ethernet mcast dest MAC
 536          */
 537         u8 *rewrite;
 538         u8 offset;
 539
 540         rewrite = ethernet_build_rewrite (vnm,
 541                                           sw_if_index,
 542                                           adj->ia_link,
 543                                           ethernet_ip6_mcast_dst_addr ());
 544
 545         /*
 546          * Complete the remaining fields of the adj's rewrite to direct the
 547          * complete of the rewrite at switch time by copying in the IP
 548          * dst address's bytes.
 549          * Ofset is 2 bytes into the desintation address. And we write 4 bytes.
 550          */
 551         offset = vec_len (rewrite) - 2;
 552         adj_mcast_update_rewrite (ai, rewrite, offset, 0xffffffff);
 553
 554         break;
 555       }
 556     case IP_LOOKUP_NEXT_DROP:
 557     case IP_LOOKUP_NEXT_PUNT:
 558     case IP_LOOKUP_NEXT_LOCAL:
 559     case IP_LOOKUP_NEXT_REWRITE:
 560     case IP_LOOKUP_NEXT_LOAD_BALANCE:
 561     case IP_LOOKUP_NEXT_MIDCHAIN:
 562     case IP_LOOKUP_NEXT_ICMP_ERROR:
 563     case IP_LOOKUP_N_NEXT:
 564       ASSERT (0);
 565       break;
 566     }
 567 }
 568
 569 int
 570 vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
 571                                 u32 sw_if_index,
 572                                 ip6_address_t * a,
 573                                 u8 * link_layer_address,
 574                                 uword n_bytes_link_layer_address,
 575                                 int is_static, int is_no_fib_entry)
 576 {
 577   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
 578   ip6_neighbor_key_t k;
 579   ip6_neighbor_t *n = 0;
 580   int make_new_nd_cache_entry = 1;
 581   uword *p;
 582   u32 next_index;
 583   pending_resolution_t *pr, *mc;
 584
 585   if (os_get_cpu_number ())
 586     {
 587       set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
 588                                   1 /* set new neighbor */ , is_static,
 589                                   is_no_fib_entry);
 590       return 0;
 591     }
 592
 593   k.sw_if_index = sw_if_index;
 594   k.ip6_address = a[0];
 595   k.pad = 0;
 596
 597   p = mhash_get (&nm->neighbor_index_by_key, &k);
 598   if (p)
 599     {
 600       n = pool_elt_at_index (nm->neighbor_pool, p[0]);
 601       /* Refuse to over-write static neighbor entry. */
 602       if (!is_static && (n->flags & IP6_NEIGHBOR_FLAG_STATIC))
 603         return -2;
 604       make_new_nd_cache_entry = 0;
 605     }
 606
 607   if (make_new_nd_cache_entry)
 608     {
 609       pool_get (nm->neighbor_pool, n);
 610       mhash_set (&nm->neighbor_index_by_key, &k, n - nm->neighbor_pool,
 611                  /* old value */ 0);
 612       n->key = k;
 613
 614       clib_memcpy (n->link_layer_address,
 615                    link_layer_address, n_bytes_link_layer_address);
 616
 617       /*
 618        * create the adj-fib. the entry in the FIB table for and to the peer.
 619        */
 620       if (!is_no_fib_entry)
 621         {
 622           fib_prefix_t pfx = {
 623             .fp_len = 128,
 624             .fp_proto = FIB_PROTOCOL_IP6,
 625             .fp_addr.ip6 = k.ip6_address,
 626           };
 627           u32 fib_index;
 628
 629           fib_index = ip6_main.fib_index_by_sw_if_index[n->key.sw_if_index];
 630           n->fib_entry_index =
 631             fib_table_entry_update_one_path (fib_index, &pfx,
 632                                              FIB_SOURCE_ADJ,
 633                                              FIB_ENTRY_FLAG_NONE,
 634                                              FIB_PROTOCOL_IP6, &pfx.fp_addr,
 635                                              n->key.sw_if_index, ~0, 1, NULL,
 636                                              FIB_ROUTE_PATH_FLAG_NONE);
 637           n->flags |= IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY;
 638         }
 639     }
 640   else
 641     {
 642       /*
 643        * prevent a DoS attack from the data-plane that
 644        * spams us with no-op updates to the MAC address
 645        */
 646       if (0 == memcmp (n->link_layer_address,
 647                        link_layer_address, n_bytes_link_layer_address))
 648         return -1;
 649
 650       clib_memcpy (n->link_layer_address,
 651                    link_layer_address, n_bytes_link_layer_address);
 652     }
 653
 654   /* Update time stamp and flags. */
 655   n->cpu_time_last_updated = clib_cpu_time_now ();
 656   if (is_static)
 657     n->flags |= IP6_NEIGHBOR_FLAG_STATIC;
 658   else
 659     n->flags |= IP6_NEIGHBOR_FLAG_DYNAMIC;
 660
 661   adj_nbr_walk_nh6 (sw_if_index,
 662                     &n->key.ip6_address, ip6_nd_mk_complete_walk, n);
 663
 664   /* Customer(s) waiting for this address to be resolved? */
 665   p = mhash_get (&nm->pending_resolutions_by_address, a);
 666   if (p)
 667     {
 668       next_index = p[0];
 669
 670       while (next_index != (u32) ~ 0)
 671         {
 672           pr = pool_elt_at_index (nm->pending_resolutions, next_index);
 673           vlib_process_signal_event (vm, pr->node_index,
 674                                      pr->type_opaque, pr->data);
 675           next_index = pr->next_index;
 676           pool_put (nm->pending_resolutions, pr);
 677         }
 678
 679       mhash_unset (&nm->pending_resolutions_by_address, a, 0);
 680     }
 681
 682   /* Customer(s) requesting ND event for this address? */
 683   p = mhash_get (&nm->mac_changes_by_address, a);
 684   if (p)
 685     {
 686       next_index = p[0];
 687
 688       while (next_index != (u32) ~ 0)
 689         {
 690           int (*fp) (u32, u8 *, u32, ip6_address_t *);
 691           int rv = 1;
 692           mc = pool_elt_at_index (nm->mac_changes, next_index);
 693           fp = mc->data_callback;
 694
 695           /* Call the user's data callback, return 1 to suppress dup events */
 696           if (fp)
 697             rv =
 698               (*fp) (mc->data, link_layer_address, sw_if_index, &ip6a_zero);
 699           /*
 700            * Signal the resolver process, as long as the user
 701            * says they want to be notified
 702            */
 703           if (rv == 0)
 704             vlib_process_signal_event (vm, mc->node_index,
 705                                        mc->type_opaque, mc->data);
 706           next_index = mc->next_index;
 707         }
 708     }
 709
 710   return 0;
 711 }
 712
 713 int
 714 vnet_unset_ip6_ethernet_neighbor (vlib_main_t * vm,
 715                                   u32 sw_if_index,
 716                                   ip6_address_t * a,
 717                                   u8 * link_layer_address,
 718                                   uword n_bytes_link_layer_address)
 719 {
 720   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
 721   ip6_neighbor_key_t k;
 722   ip6_neighbor_t *n;
 723   uword *p;
 724   int rv = 0;
 725
 726   if (os_get_cpu_number ())
 727     {
 728       set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
 729                                   0 /* unset */ , 0, 0);
 730       return 0;
 731     }
 732
 733   k.sw_if_index = sw_if_index;
 734   k.ip6_address = a[0];
 735   k.pad = 0;
 736
 737   p = mhash_get (&nm->neighbor_index_by_key, &k);
 738   if (p == 0)
 739     {
 740       rv = -1;
 741       goto out;
 742     }
 743
 744   n = pool_elt_at_index (nm->neighbor_pool, p[0]);
 745   mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
 746
 747   adj_nbr_walk_nh6 (sw_if_index,
 748                     &n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL);
 749
 750   fib_table_entry_delete_index (n->fib_entry_index, FIB_SOURCE_ADJ);
 751   pool_put (nm->neighbor_pool, n);
 752
 753 out:
 754   return rv;
 755 }
 756
 757 static void ip6_neighbor_set_unset_rpc_callback
 758   (ip6_neighbor_set_unset_rpc_args_t * a)
 759 {
 760   vlib_main_t *vm = vlib_get_main ();
 761   if (a->is_add)
 762     vnet_set_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
 763                                     a->link_layer_address, 6, a->is_static,
 764                                     a->is_no_fib_entry);
 765   else
 766     vnet_unset_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
 767                                       a->link_layer_address, 6);
 768 }
 769
 770 static int
 771 ip6_neighbor_sort (void *a1, void *a2)
 772 {
 773   vnet_main_t *vnm = vnet_get_main ();
 774   ip6_neighbor_t *n1 = a1, *n2 = a2;
 775   int cmp;
 776   cmp = vnet_sw_interface_compare (vnm, n1->key.sw_if_index,
 777                                    n2->key.sw_if_index);
 778   if (!cmp)
 779     cmp = ip6_address_compare (&n1->key.ip6_address, &n2->key.ip6_address);
 780   return cmp;
 781 }
 782
 783 ip6_neighbor_t *
 784 ip6_neighbors_entries (u32 sw_if_index)
 785 {
 786   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
 787   ip6_neighbor_t *n, *ns = 0;
 788
 789   /* *INDENT-OFF* */
 790   pool_foreach (n, nm->neighbor_pool,
 791   ({
 792     if (sw_if_index != ~0 && n->key.sw_if_index != sw_if_index)
 793       continue;
 794     vec_add1 (ns, n[0]);
 795   }));
 796   /* *INDENT-ON* */
 797
 798   if (ns)
 799     vec_sort_with_function (ns, ip6_neighbor_sort);
 800   return ns;
 801 }
 802
 803 static clib_error_t *
 804 show_ip6_neighbors (vlib_main_t * vm,
 805                     unformat_input_t * input, vlib_cli_command_t * cmd)
 806 {
 807   vnet_main_t *vnm = vnet_get_main ();
 808   ip6_neighbor_t *n, *ns;
 809   clib_error_t *error = 0;
 810   u32 sw_if_index;
 811
 812   /* Filter entries by interface if given. */
 813   sw_if_index = ~0;
 814   (void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index);
 815
 816   ns = ip6_neighbors_entries (sw_if_index);
 817   if (ns)
 818     {
 819       vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, 0);
 820       vec_foreach (n, ns)
 821       {
 822         vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, n);
 823       }
 824       vec_free (ns);
 825     }
 826
 827   return error;
 828 }
 829
 830 /*?
 831  * This command is used to display the adjacent IPv6 hosts found via
 832  * neighbor discovery. Optionally, limit the output to the specified
 833  * interface.
 834  *
 835  * @cliexpar
 836  * Example of how to display the IPv6 neighbor adjacency table:
 837  * @cliexstart{show ip6 neighbors}
 838  *     Time           Address       Flags     Link layer                     Interface
 839  *      34.0910     ::a:1:1:0:7            02:fe:6a:07:39:6f                GigabitEthernet2/0/0
 840  *     173.2916     ::b:5:1:c:2            02:fe:50:62:3a:94                GigabitEthernet2/0/0
 841  *     886.6654     ::1:1:c:0:9       S    02:fe:e4:45:27:5b                GigabitEthernet3/0/0
 842  * @cliexend
 843  * Example of how to display the IPv6 neighbor adjacency table for given interface:
 844  * @cliexstart{show ip6 neighbors GigabitEthernet2/0/0}
 845  *     Time           Address       Flags     Link layer                     Interface
 846  *      34.0910     ::a:1:1:0:7            02:fe:6a:07:39:6f                GigabitEthernet2/0/0
 847  *     173.2916     ::b:5:1:c:2            02:fe:50:62:3a:94                GigabitEthernet2/0/0
 848  * @cliexend
 849 ?*/
 850 /* *INDENT-OFF* */
 851 VLIB_CLI_COMMAND (show_ip6_neighbors_command, static) = {
 852   .path = "show ip6 neighbors",
 853   .function = show_ip6_neighbors,
 854   .short_help = "show ip6 neighbors [<interface>]",
 855 };
 856 /* *INDENT-ON* */
 857
 858 static clib_error_t *
 859 set_ip6_neighbor (vlib_main_t * vm,
 860                   unformat_input_t * input, vlib_cli_command_t * cmd)
 861 {
 862   vnet_main_t *vnm = vnet_get_main ();
 863   ip6_address_t addr;
 864   u8 mac_address[6];
 865   int addr_valid = 0;
 866   int is_del = 0;
 867   int is_static = 0;
 868   int is_no_fib_entry = 0;
 869   u32 sw_if_index;
 870
 871   while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
 872     {
 873       /* intfc, ip6-address, mac-address */
 874       if (unformat (input, "%U %U %U",
 875                     unformat_vnet_sw_interface, vnm, &sw_if_index,
 876                     unformat_ip6_address, &addr,
 877                     unformat_ethernet_address, mac_address))
 878         addr_valid = 1;
 879
 880       else if (unformat (input, "delete") || unformat (input, "del"))
 881         is_del = 1;
 882       else if (unformat (input, "static"))
 883         is_static = 1;
 884       else if (unformat (input, "no-fib-entry"))
 885         is_no_fib_entry = 1;
 886       else
 887         break;
 888     }
 889
 890   if (!addr_valid)
 891     return clib_error_return (0, "Missing interface, ip6 or hw address");
 892
 893   if (!is_del)
 894     vnet_set_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
 895                                     mac_address, sizeof (mac_address),
 896                                     is_static, is_no_fib_entry);
 897   else
 898     vnet_unset_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
 899                                       mac_address, sizeof (mac_address));
 900   return 0;
 901 }
 902
 903 /*?
 904  * This command is used to manually add an entry to the IPv6 neighbor
 905  * adjacency table. Optionally, the entry can be added as static. It is
 906  * also used to remove an entry from the table. Use the '<em>show ip6
 907  * neighbors</em>' command to display all learned and manually entered entries.
 908  *
 909  * @cliexpar
 910  * Example of how to add a static entry to the IPv6 neighbor adjacency table:
 911  * @cliexcmd{set ip6 neighbor GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b static}
 912  * Example of how to delete an entry from the IPv6 neighbor adjacency table:
 913  * @cliexcmd{set ip6 neighbor del GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b}
 914 ?*/
 915 /* *INDENT-OFF* */
 916 VLIB_CLI_COMMAND (set_ip6_neighbor_command, static) =
 917 {
 918   .path = "set ip6 neighbor",
 919   .function = set_ip6_neighbor,
 920   .short_help = "set ip6 neighbor [del] <interface> <ip6-address> <mac-address> [static]",
 921 };
 922 /* *INDENT-ON* */
 923
 924 typedef enum
 925 {
 926   ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP,
 927   ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY,
 928   ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
 929 } icmp6_neighbor_solicitation_or_advertisement_next_t;
 930
 931 static_always_inline uword
 932 icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
 933                                               vlib_node_runtime_t * node,
 934                                               vlib_frame_t * frame,
 935                                               uword is_solicitation)
 936 {
 937   vnet_main_t *vnm = vnet_get_main ();
 938   ip6_main_t *im = &ip6_main;
 939   uword n_packets = frame->n_vectors;
 940   u32 *from, *to_next;
 941   u32 n_left_from, n_left_to_next, next_index, n_advertisements_sent;
 942   icmp6_neighbor_discovery_option_type_t option_type;
 943   vlib_node_runtime_t *error_node =
 944     vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
 945   int bogus_length;
 946
 947   from = vlib_frame_vector_args (frame);
 948   n_left_from = n_packets;
 949   next_index = node->cached_next_index;
 950
 951   if (node->flags & VLIB_NODE_FLAG_TRACE)
 952     vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
 953                                    /* stride */ 1,
 954                                    sizeof (icmp6_input_trace_t));
 955
 956   option_type =
 957     (is_solicitation
 958      ? ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address
 959      : ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address);
 960   n_advertisements_sent = 0;
 961
 962   while (n_left_from > 0)
 963     {
 964       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
 965
 966       while (n_left_from > 0 && n_left_to_next > 0)
 967         {
 968           vlib_buffer_t *p0;
 969           ip6_header_t *ip0;
 970           icmp6_neighbor_solicitation_or_advertisement_header_t *h0;
 971           icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
 972           u32 bi0, options_len0, sw_if_index0, next0, error0;
 973           u32 ip6_sadd_link_local, ip6_sadd_unspecified;
 974           int is_rewrite0;
 975           u32 ni0;
 976
 977           bi0 = to_next[0] = from[0];
 978
 979           from += 1;
 980           to_next += 1;
 981           n_left_from -= 1;
 982           n_left_to_next -= 1;
 983
 984           p0 = vlib_get_buffer (vm, bi0);
 985           ip0 = vlib_buffer_get_current (p0);
 986           h0 = ip6_next_header (ip0);
 987           options_len0 =
 988             clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
 989
 990           error0 = ICMP6_ERROR_NONE;
 991           sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
 992           ip6_sadd_link_local =
 993             ip6_address_is_link_local_unicast (&ip0->src_address);
 994           ip6_sadd_unspecified =
 995             ip6_address_is_unspecified (&ip0->src_address);
 996
 997           /* Check that source address is unspecified, link-local or else on-link. */
 998           if (!ip6_sadd_unspecified && !ip6_sadd_link_local)
 999             {
1000               u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1001
1002               if (ADJ_INDEX_INVALID != src_adj_index0)
1003                 {
1004                   ip_adjacency_t *adj0 =
1005                     ip_get_adjacency (&im->lookup_main, src_adj_index0);
1006
1007                   /* Allow all realistic-looking rewrite adjacencies to pass */
1008                   ni0 = adj0->lookup_next_index;
1009                   is_rewrite0 = (ni0 >= IP_LOOKUP_NEXT_ARP) &&
1010                     (ni0 < IP6_LOOKUP_N_NEXT);
1011
1012                   error0 = ((adj0->rewrite_header.sw_if_index != sw_if_index0
1013                              || !is_rewrite0)
1014                             ?
1015                             ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK
1016                             : error0);
1017                 }
1018               else
1019                 {
1020                   error0 =
1021                     ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK;
1022                 }
1023             }
1024
1025           o0 = (void *) (h0 + 1);
1026           o0 = ((options_len0 == 8 && o0->header.type == option_type
1027                  && o0->header.n_data_u64s == 1) ? o0 : 0);
1028
1029           /* If src address unspecified or link local, donot learn neighbor MAC */
1030           if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1031                             !ip6_sadd_unspecified && !ip6_sadd_link_local))
1032             {
1033               ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1034               if (nm->limit_neighbor_cache_size &&
1035                   pool_elts (nm->neighbor_pool) >=
1036                   nm->limit_neighbor_cache_size)
1037                 unset_random_neighbor_entry ();
1038               vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1039                                               is_solicitation ?
1040                                               &ip0->src_address :
1041                                               &h0->target_address,
1042                                               o0->ethernet_address,
1043                                               sizeof (o0->ethernet_address),
1044                                               0, 0);
1045             }
1046
1047           if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1048             {
1049               /* Check that target address is local to this router. */
1050               fib_node_index_t fei;
1051               u32 fib_index;
1052
1053               fib_index =
1054                 ip6_fib_table_get_index_for_sw_if_index (sw_if_index0);
1055
1056               if (~0 == fib_index)
1057                 {
1058                   error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1059                 }
1060               else
1061                 {
1062                   fei = ip6_fib_table_lookup_exact_match (fib_index,
1063                                                           &h0->target_address,
1064                                                           128);
1065
1066                   if (FIB_NODE_INDEX_INVALID == fei)
1067                     {
1068                       /* The target address is not in the FIB */
1069                       error0 =
1070                         ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1071                     }
1072                   else
1073                     {
1074                       if (FIB_ENTRY_FLAG_LOCAL &
1075                           fib_entry_get_flags_for_source (fei,
1076                                                           FIB_SOURCE_INTERFACE))
1077                         {
1078                           /* It's an address that belongs to one of our interfaces
1079                            * that's good. */
1080                         }
1081                       else
1082                         if (fib_entry_is_sourced
1083                             (fei, FIB_SOURCE_IP6_ND_PROXY))
1084                         {
1085                           /* The address was added by IPv6 Proxy ND config.
1086                            * We should only respond to these if the NS arrived on
1087                            * the link that has a matching covering prefix */
1088                         }
1089                       else
1090                         {
1091                           error0 =
1092                             ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1093                         }
1094                     }
1095                 }
1096             }
1097
1098           if (is_solicitation)
1099             next0 = (error0 != ICMP6_ERROR_NONE
1100                      ? ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP
1101                      : ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY);
1102           else
1103             {
1104               next0 = 0;
1105               error0 = error0 == ICMP6_ERROR_NONE ?
1106                 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_RX : error0;
1107             }
1108
1109           if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1110             {
1111               vnet_sw_interface_t *sw_if0;
1112               ethernet_interface_t *eth_if0;
1113               ethernet_header_t *eth0;
1114
1115               /* dst address is either source address or the all-nodes mcast addr */
1116               if (!ip6_sadd_unspecified)
1117                 ip0->dst_address = ip0->src_address;
1118               else
1119                 ip6_set_reserved_multicast_address (&ip0->dst_address,
1120                                                     IP6_MULTICAST_SCOPE_link_local,
1121                                                     IP6_MULTICAST_GROUP_ID_all_hosts);
1122
1123               ip0->src_address = h0->target_address;
1124               ip0->hop_limit = 255;
1125               h0->icmp.type = ICMP6_neighbor_advertisement;
1126
1127               sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1128               ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1129               eth_if0 =
1130                 ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
1131               if (eth_if0 && o0)
1132                 {
1133                   clib_memcpy (o0->ethernet_address, eth_if0->address, 6);
1134                   o0->header.type =
1135                     ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
1136                 }
1137
1138               h0->advertisement_flags = clib_host_to_net_u32
1139                 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED
1140                  | ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
1141
1142               h0->icmp.checksum = 0;
1143               h0->icmp.checksum =
1144                 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1145                                                    &bogus_length);
1146               ASSERT (bogus_length == 0);
1147
1148               /* Reuse current MAC header, copy SMAC to DMAC and
1149                * interface MAC to SMAC */
1150               vlib_buffer_advance (p0, -ethernet_buffer_header_size (p0));
1151               eth0 = vlib_buffer_get_current (p0);
1152               clib_memcpy (eth0->dst_address, eth0->src_address, 6);
1153               if (eth_if0)
1154                 clib_memcpy (eth0->src_address, eth_if0->address, 6);
1155
1156               /* Setup input and output sw_if_index for packet */
1157               ASSERT (vnet_buffer (p0)->sw_if_index[VLIB_RX] == sw_if_index0);
1158               vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1159               vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1160                 vnet_main.local_interface_sw_if_index;
1161
1162               n_advertisements_sent++;
1163             }
1164
1165           p0->error = error_node->errors[error0];
1166
1167           vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1168                                            to_next, n_left_to_next,
1169                                            bi0, next0);
1170         }
1171
1172       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1173     }
1174
1175   /* Account for advertisements sent. */
1176   vlib_error_count (vm, error_node->node_index,
1177                     ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX,
1178                     n_advertisements_sent);
1179
1180   return frame->n_vectors;
1181 }
1182
1183 /* for "syslogging" - use elog for now */
1184 #define foreach_log_level            \
1185   _ (DEBUG, "DEBUG")                         \
1186   _ (INFO, "INFORMATION")            \
1187   _ (NOTICE, "NOTICE")               \
1188   _ (WARNING, "WARNING")             \
1189   _ (ERR, "ERROR")                                    \
1190   _ (CRIT, "CRITICAL")                        \
1191   _ (ALERT, "ALERT")                          \
1192   _ (EMERG,  "EMERGENCY")
1193
1194 typedef enum
1195 {
1196 #define _(f,s) LOG_##f,
1197   foreach_log_level
1198 #undef _
1199 } log_level_t;
1200
1201 static char *log_level_strings[] = {
1202 #define _(f,s) s,
1203   foreach_log_level
1204 #undef _
1205 };
1206
1207 static int logmask = 1 << LOG_DEBUG;
1208
1209 static void
1210 ip6_neighbor_syslog (vlib_main_t * vm, int priority, char *fmt, ...)
1211 {
1212   /* just use elog for now */
1213   u8 *what;
1214   va_list va;
1215
1216   if ((priority > LOG_EMERG) || !(logmask & (1 << priority)))
1217     return;
1218
1219   va_start (va, fmt);
1220   if (fmt)
1221     {
1222       what = va_format (0, fmt, &va);
1223
1224       ELOG_TYPE_DECLARE (e) =
1225       {
1226       .format = "ip6 nd:  (%s): %s",.format_args = "T4T4",};
1227       struct
1228       {
1229         u32 s[2];
1230       } *ed;
1231       ed = ELOG_DATA (&vm->elog_main, e);
1232       ed->s[0] = elog_string (&vm->elog_main, log_level_strings[priority]);
1233       ed->s[1] = elog_string (&vm->elog_main, (char *) what);
1234     }
1235   va_end (va);
1236   return;
1237 }
1238
1239 /* ipv6 neighbor discovery - router advertisements */
1240 typedef enum
1241 {
1242   ICMP6_ROUTER_SOLICITATION_NEXT_DROP,
1243   ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW,
1244   ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX,
1245   ICMP6_ROUTER_SOLICITATION_N_NEXT,
1246 } icmp6_router_solicitation_or_advertisement_next_t;
1247
1248 static_always_inline uword
1249 icmp6_router_solicitation (vlib_main_t * vm,
1250                            vlib_node_runtime_t * node, vlib_frame_t * frame)
1251 {
1252   vnet_main_t *vnm = vnet_get_main ();
1253   ip6_main_t *im = &ip6_main;
1254   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1255   uword n_packets = frame->n_vectors;
1256   u32 *from, *to_next;
1257   u32 n_left_from, n_left_to_next, next_index;
1258   u32 n_advertisements_sent = 0;
1259   int bogus_length;
1260
1261   icmp6_neighbor_discovery_option_type_t option_type;
1262
1263   vlib_node_runtime_t *error_node =
1264     vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1265
1266   from = vlib_frame_vector_args (frame);
1267   n_left_from = n_packets;
1268   next_index = node->cached_next_index;
1269
1270   if (node->flags & VLIB_NODE_FLAG_TRACE)
1271     vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1272                                    /* stride */ 1,
1273                                    sizeof (icmp6_input_trace_t));
1274
1275   /* source may append his LL address */
1276   option_type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1277
1278   while (n_left_from > 0)
1279     {
1280       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1281
1282       while (n_left_from > 0 && n_left_to_next > 0)
1283         {
1284           vlib_buffer_t *p0;
1285           ip6_header_t *ip0;
1286           ip6_radv_t *radv_info = 0;
1287
1288           icmp6_neighbor_discovery_header_t *h0;
1289           icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1290
1291           u32 bi0, options_len0, sw_if_index0, next0, error0;
1292           u32 is_solicitation = 1, is_dropped = 0;
1293           u32 is_unspecified, is_link_local;
1294
1295           bi0 = to_next[0] = from[0];
1296
1297           from += 1;
1298           to_next += 1;
1299           n_left_from -= 1;
1300           n_left_to_next -= 1;
1301
1302           p0 = vlib_get_buffer (vm, bi0);
1303           ip0 = vlib_buffer_get_current (p0);
1304           h0 = ip6_next_header (ip0);
1305           options_len0 =
1306             clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1307           is_unspecified = ip6_address_is_unspecified (&ip0->src_address);
1308           is_link_local =
1309             ip6_address_is_link_local_unicast (&ip0->src_address);
1310
1311           error0 = ICMP6_ERROR_NONE;
1312           sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1313
1314           /* check if solicitation  (not from nd_timer node) */
1315           if (ip6_address_is_unspecified (&ip0->dst_address))
1316             is_solicitation = 0;
1317
1318           /* Check that source address is unspecified, link-local or else on-link. */
1319           if (!is_unspecified && !is_link_local)
1320             {
1321               u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1322
1323               if (ADJ_INDEX_INVALID != src_adj_index0)
1324                 {
1325                   ip_adjacency_t *adj0 = ip_get_adjacency (&im->lookup_main,
1326                                                            src_adj_index0);
1327
1328                   error0 = (adj0->rewrite_header.sw_if_index != sw_if_index0
1329                             ?
1330                             ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK
1331                             : error0);
1332                 }
1333               else
1334                 {
1335                   error0 = ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK;
1336                 }
1337             }
1338
1339           /* check for source LL option and process */
1340           o0 = (void *) (h0 + 1);
1341           o0 = ((options_len0 == 8
1342                  && o0->header.type == option_type
1343                  && o0->header.n_data_u64s == 1) ? o0 : 0);
1344
1345           /* if src address unspecified IGNORE any options */
1346           if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1347                             !is_unspecified && !is_link_local))
1348             {
1349               ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1350               if (nm->limit_neighbor_cache_size &&
1351                   pool_elts (nm->neighbor_pool) >=
1352                   nm->limit_neighbor_cache_size)
1353                 unset_random_neighbor_entry ();
1354
1355               vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1356                                               &ip0->src_address,
1357                                               o0->ethernet_address,
1358                                               sizeof (o0->ethernet_address),
1359                                               0, 0);
1360             }
1361
1362           /* default is to drop */
1363           next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1364
1365           if (error0 == ICMP6_ERROR_NONE)
1366             {
1367               vnet_sw_interface_t *sw_if0;
1368               ethernet_interface_t *eth_if0;
1369               u32 adj_index0;
1370
1371               sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1372               ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1373               eth_if0 =
1374                 ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
1375
1376               /* only support ethernet interface type for now */
1377               error0 =
1378                 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1379                 : error0;
1380
1381               if (error0 == ICMP6_ERROR_NONE)
1382                 {
1383                   u32 ri;
1384
1385                   /* adjust the sizeof the buffer to just include the ipv6 header */
1386                   p0->current_length -=
1387                     (options_len0 +
1388                      sizeof (icmp6_neighbor_discovery_header_t));
1389
1390                   /* look up the radv_t information for this interface */
1391                   vec_validate_init_empty
1392                     (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
1393
1394                   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1395
1396                   if (ri != ~0)
1397                     radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1398
1399                   error0 =
1400                     ((!radv_info) ?
1401                      ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1402                      error0);
1403
1404                   if (error0 == ICMP6_ERROR_NONE)
1405                     {
1406                       f64 now = vlib_time_now (vm);
1407
1408                       /* for solicited adverts - need to rate limit */
1409                       if (is_solicitation)
1410                         {
1411                           if (0 != radv_info->last_radv_time &&
1412                               (now - radv_info->last_radv_time) <
1413                               MIN_DELAY_BETWEEN_RAS)
1414                             is_dropped = 1;
1415                           else
1416                             radv_info->last_radv_time = now;
1417                         }
1418
1419                       /* send now  */
1420                       icmp6_router_advertisement_header_t rh;
1421
1422                       rh.icmp.type = ICMP6_router_advertisement;
1423                       rh.icmp.code = 0;
1424                       rh.icmp.checksum = 0;
1425
1426                       rh.current_hop_limit = radv_info->curr_hop_limit;
1427                       rh.router_lifetime_in_sec =
1428                         clib_host_to_net_u16
1429                         (radv_info->adv_router_lifetime_in_sec);
1430                       rh.
1431                         time_in_msec_between_retransmitted_neighbor_solicitations
1432                         =
1433                         clib_host_to_net_u32 (radv_info->
1434                                               adv_time_in_msec_between_retransmitted_neighbor_solicitations);
1435                       rh.neighbor_reachable_time_in_msec =
1436                         clib_host_to_net_u32 (radv_info->
1437                                               adv_neighbor_reachable_time_in_msec);
1438
1439                       rh.flags =
1440                         (radv_info->adv_managed_flag) ?
1441                         ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP :
1442                         0;
1443                       rh.flags |=
1444                         ((radv_info->adv_other_flag) ?
1445                          ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP :
1446                          0);
1447
1448
1449                       u16 payload_length =
1450                         sizeof (icmp6_router_advertisement_header_t);
1451
1452                       vlib_buffer_add_data (vm,
1453                                             p0->free_list_index,
1454                                             bi0,
1455                                             (void *) &rh,
1456                                             sizeof
1457                                             (icmp6_router_advertisement_header_t));
1458
1459                       if (radv_info->adv_link_layer_address)
1460                         {
1461                           icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
1462                             h;
1463
1464                           h.header.type =
1465                             ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1466                           h.header.n_data_u64s = 1;
1467
1468                           /* copy ll address */
1469                           clib_memcpy (&h.ethernet_address[0],
1470                                        eth_if0->address, 6);
1471
1472                           vlib_buffer_add_data (vm,
1473                                                 p0->free_list_index,
1474                                                 bi0,
1475                                                 (void *) &h,
1476                                                 sizeof
1477                                                 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t));
1478
1479                           payload_length +=
1480                             sizeof
1481                             (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t);
1482                         }
1483
1484                       /* add MTU option */
1485                       if (radv_info->adv_link_mtu)
1486                         {
1487                           icmp6_neighbor_discovery_mtu_option_t h;
1488
1489                           h.unused = 0;
1490                           h.mtu =
1491                             clib_host_to_net_u32 (radv_info->adv_link_mtu);
1492                           h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu;
1493                           h.header.n_data_u64s = 1;
1494
1495                           payload_length +=
1496                             sizeof (icmp6_neighbor_discovery_mtu_option_t);
1497
1498                           vlib_buffer_add_data (vm,
1499                                                 p0->free_list_index,
1500                                                 bi0,
1501                                                 (void *) &h,
1502                                                 sizeof
1503                                                 (icmp6_neighbor_discovery_mtu_option_t));
1504                         }
1505
1506                       /* add advertised prefix options  */
1507                       ip6_radv_prefix_t *pr_info;
1508
1509                       /* *INDENT-OFF* */
1510                       pool_foreach (pr_info, radv_info->adv_prefixes_pool,
1511                       ({
1512                         if(pr_info->enabled &&
1513                            (!pr_info->decrement_lifetime_flag
1514                             || (pr_info->pref_lifetime_expires >0)))
1515                           {
1516                             /* advertise this prefix */
1517                             icmp6_neighbor_discovery_prefix_information_option_t h;
1518
1519                             h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information;
1520                             h.header.n_data_u64s  =  (sizeof(icmp6_neighbor_discovery_prefix_information_option_t) >> 3);
1521
1522                             h.dst_address_length  = pr_info->prefix_len;
1523
1524                             h.flags  = (pr_info->adv_on_link_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_FLAG_ON_LINK : 0;
1525                             h.flags |= (pr_info->adv_autonomous_flag) ?  ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_AUTO :  0;
1526
1527                             if(radv_info->cease_radv && pr_info->deprecated_prefix_flag)
1528                               {
1529                                 h.valid_time = clib_host_to_net_u32(MIN_ADV_VALID_LIFETIME);
1530                                 h.preferred_time  = 0;
1531                               }
1532                             else
1533                               {
1534                                 if(pr_info->decrement_lifetime_flag)
1535                                   {
1536                                     pr_info->adv_valid_lifetime_in_secs = ((pr_info->valid_lifetime_expires  > now)) ?
1537                                       (pr_info->valid_lifetime_expires  - now) : 0;
1538
1539                                     pr_info->adv_pref_lifetime_in_secs = ((pr_info->pref_lifetime_expires  > now)) ?
1540                                       (pr_info->pref_lifetime_expires  - now) : 0;
1541                                   }
1542
1543                                 h.valid_time = clib_host_to_net_u32(pr_info->adv_valid_lifetime_in_secs);
1544                                 h.preferred_time  = clib_host_to_net_u32(pr_info->adv_pref_lifetime_in_secs) ;
1545                               }
1546                             h.unused  = 0;
1547
1548                             clib_memcpy(&h.dst_address, &pr_info->prefix,  sizeof(ip6_address_t));
1549
1550                             payload_length += sizeof( icmp6_neighbor_discovery_prefix_information_option_t);
1551
1552                             vlib_buffer_add_data (vm,
1553                                                   p0->free_list_index,
1554                                                   bi0,
1555                                                   (void *)&h, sizeof(icmp6_neighbor_discovery_prefix_information_option_t));
1556
1557                           }
1558                       }));
1559                       /* *INDENT-ON* */
1560
1561                       /* add additional options before here */
1562
1563                       /* finish building the router advertisement... */
1564                       if (!is_unspecified && radv_info->send_unicast)
1565                         {
1566                           ip0->dst_address = ip0->src_address;
1567                         }
1568                       else
1569                         {
1570                           /* target address is all-nodes mcast addr */
1571                           ip6_set_reserved_multicast_address
1572                             (&ip0->dst_address,
1573                              IP6_MULTICAST_SCOPE_link_local,
1574                              IP6_MULTICAST_GROUP_ID_all_hosts);
1575                         }
1576
1577                       /* source address MUST be the link-local address */
1578                       ip0->src_address = radv_info->link_local_address;
1579
1580                       ip0->hop_limit = 255;
1581                       ip0->payload_length =
1582                         clib_host_to_net_u16 (payload_length);
1583
1584                       icmp6_router_advertisement_header_t *rh0 =
1585                         (icmp6_router_advertisement_header_t *) (ip0 + 1);
1586                       rh0->icmp.checksum =
1587                         ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1588                                                            &bogus_length);
1589                       ASSERT (bogus_length == 0);
1590
1591                       /* setup output if and adjacency */
1592                       vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1593                         vnet_main.local_interface_sw_if_index;
1594
1595                       if (is_solicitation)
1596                         {
1597                           ethernet_header_t *eth0;
1598                           /* Reuse current MAC header, copy SMAC to DMAC and
1599                            * interface MAC to SMAC */
1600                           vlib_buffer_reset (p0);
1601                           eth0 = vlib_buffer_get_current (p0);
1602                           clib_memcpy (eth0->dst_address, eth0->src_address,
1603                                        6);
1604                           clib_memcpy (eth0->src_address, eth_if0->address,
1605                                        6);
1606                           next0 =
1607                             is_dropped ? next0 :
1608                             ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX;
1609                           vnet_buffer (p0)->sw_if_index[VLIB_TX] =
1610                             sw_if_index0;
1611                         }
1612                       else
1613                         {
1614                           adj_index0 = radv_info->mcast_adj_index;
1615                           if (adj_index0 == 0)
1616                             error0 = ICMP6_ERROR_DST_LOOKUP_MISS;
1617                           else
1618                             {
1619                               next0 =
1620                                 is_dropped ? next0 :
1621                                 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW;
1622                               vnet_buffer (p0)->ip.adj_index[VLIB_TX] =
1623                                 adj_index0;
1624                             }
1625                         }
1626                       p0->flags |= VNET_BUFFER_LOCALLY_ORIGINATED;
1627
1628                       radv_info->n_solicitations_dropped += is_dropped;
1629                       radv_info->n_solicitations_rcvd += is_solicitation;
1630
1631                       if ((error0 == ICMP6_ERROR_NONE) && !is_dropped)
1632                         {
1633                           radv_info->n_advertisements_sent++;
1634                           n_advertisements_sent++;
1635                         }
1636                     }
1637                 }
1638             }
1639
1640           p0->error = error_node->errors[error0];
1641
1642           if (error0 != ICMP6_ERROR_NONE)
1643             vlib_error_count (vm, error_node->node_index, error0, 1);
1644
1645           vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1646                                            to_next, n_left_to_next,
1647                                            bi0, next0);
1648
1649         }
1650
1651       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1652     }
1653
1654   /* Account for router advertisements sent. */
1655   vlib_error_count (vm, error_node->node_index,
1656                     ICMP6_ERROR_ROUTER_ADVERTISEMENTS_TX,
1657                     n_advertisements_sent);
1658
1659   return frame->n_vectors;
1660 }
1661
1662  /* validate advertised info for consistancy (see RFC-4861 section 6.2.7) - log any inconsistencies, packet will always  be dropped  */
1663 static_always_inline uword
1664 icmp6_router_advertisement (vlib_main_t * vm,
1665                             vlib_node_runtime_t * node, vlib_frame_t * frame)
1666 {
1667   vnet_main_t *vnm = vnet_get_main ();
1668   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1669   uword n_packets = frame->n_vectors;
1670   u32 *from, *to_next;
1671   u32 n_left_from, n_left_to_next, next_index;
1672   u32 n_advertisements_rcvd = 0;
1673
1674   vlib_node_runtime_t *error_node =
1675     vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1676
1677   from = vlib_frame_vector_args (frame);
1678   n_left_from = n_packets;
1679   next_index = node->cached_next_index;
1680
1681   if (node->flags & VLIB_NODE_FLAG_TRACE)
1682     vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1683                                    /* stride */ 1,
1684                                    sizeof (icmp6_input_trace_t));
1685
1686   while (n_left_from > 0)
1687     {
1688       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1689
1690       while (n_left_from > 0 && n_left_to_next > 0)
1691         {
1692           vlib_buffer_t *p0;
1693           ip6_header_t *ip0;
1694           ip6_radv_t *radv_info = 0;
1695           icmp6_router_advertisement_header_t *h0;
1696           u32 bi0, options_len0, sw_if_index0, next0, error0;
1697
1698           bi0 = to_next[0] = from[0];
1699
1700           from += 1;
1701           to_next += 1;
1702           n_left_from -= 1;
1703           n_left_to_next -= 1;
1704
1705           p0 = vlib_get_buffer (vm, bi0);
1706           ip0 = vlib_buffer_get_current (p0);
1707           h0 = ip6_next_header (ip0);
1708           options_len0 =
1709             clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1710
1711           error0 = ICMP6_ERROR_NONE;
1712           sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1713
1714           /* Check that source address is link-local */
1715           error0 = (!ip6_address_is_link_local_unicast (&ip0->src_address)) ?
1716             ICMP6_ERROR_ROUTER_ADVERTISEMENT_SOURCE_NOT_LINK_LOCAL : error0;
1717
1718           /* default is to drop */
1719           next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1720
1721           n_advertisements_rcvd++;
1722
1723           if (error0 == ICMP6_ERROR_NONE)
1724             {
1725               vnet_sw_interface_t *sw_if0;
1726               ethernet_interface_t *eth_if0;
1727
1728               sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1729               ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1730               eth_if0 =
1731                 ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
1732
1733               /* only support ethernet interface type for now */
1734               error0 =
1735                 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1736                 : error0;
1737
1738               if (error0 == ICMP6_ERROR_NONE)
1739                 {
1740                   u32 ri;
1741
1742                   /* look up the radv_t information for this interface */
1743                   vec_validate_init_empty
1744                     (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
1745
1746                   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1747
1748                   if (ri != ~0)
1749                     radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1750
1751                   error0 =
1752                     ((!radv_info) ?
1753                      ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1754                      error0);
1755
1756                   if (error0 == ICMP6_ERROR_NONE)
1757                     {
1758                       /* validate advertised information */
1759                       if ((h0->current_hop_limit && radv_info->curr_hop_limit)
1760                           && (h0->current_hop_limit !=
1761                               radv_info->curr_hop_limit))
1762                         {
1763                           ip6_neighbor_syslog (vm, LOG_WARNING,
1764                                                "our AdvCurHopLimit 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                       if ((h0->flags &
1772                            ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP)
1773                           != radv_info->adv_managed_flag)
1774                         {
1775                           ip6_neighbor_syslog (vm, LOG_WARNING,
1776                                                "our AdvManagedFlag on %U doesn't agree with %U",
1777                                                format_vnet_sw_if_index_name,
1778                                                vnm, sw_if_index0,
1779                                                format_ip6_address,
1780                                                &ip0->src_address);
1781                         }
1782
1783                       if ((h0->flags &
1784                            ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP)
1785                           != radv_info->adv_other_flag)
1786                         {
1787                           ip6_neighbor_syslog (vm, LOG_WARNING,
1788                                                "our AdvOtherConfigFlag on %U doesn't agree with %U",
1789                                                format_vnet_sw_if_index_name,
1790                                                vnm, sw_if_index0,
1791                                                format_ip6_address,
1792                                                &ip0->src_address);
1793                         }
1794
1795                       if ((h0->
1796                            time_in_msec_between_retransmitted_neighbor_solicitations
1797                            && radv_info->
1798                            adv_time_in_msec_between_retransmitted_neighbor_solicitations)
1799                           && (h0->
1800                               time_in_msec_between_retransmitted_neighbor_solicitations
1801                               !=
1802                               clib_host_to_net_u32 (radv_info->
1803                                                     adv_time_in_msec_between_retransmitted_neighbor_solicitations)))
1804                         {
1805                           ip6_neighbor_syslog (vm, LOG_WARNING,
1806                                                "our AdvRetransTimer on %U doesn't agree with %U",
1807                                                format_vnet_sw_if_index_name,
1808                                                vnm, sw_if_index0,
1809                                                format_ip6_address,
1810                                                &ip0->src_address);
1811                         }
1812
1813                       if ((h0->neighbor_reachable_time_in_msec &&
1814                            radv_info->adv_neighbor_reachable_time_in_msec) &&
1815                           (h0->neighbor_reachable_time_in_msec !=
1816                            clib_host_to_net_u32
1817                            (radv_info->adv_neighbor_reachable_time_in_msec)))
1818                         {
1819                           ip6_neighbor_syslog (vm, LOG_WARNING,
1820                                                "our AdvReachableTime on %U doesn't agree with %U",
1821                                                format_vnet_sw_if_index_name,
1822                                                vnm, sw_if_index0,
1823                                                format_ip6_address,
1824                                                &ip0->src_address);
1825                         }
1826
1827                       /* check for MTU or prefix options or .. */
1828                       u8 *opt_hdr = (u8 *) (h0 + 1);
1829                       while (options_len0 > 0)
1830                         {
1831                           icmp6_neighbor_discovery_option_header_t *o0 =
1832                             (icmp6_neighbor_discovery_option_header_t *)
1833                             opt_hdr;
1834                           int opt_len = o0->n_data_u64s << 3;
1835                           icmp6_neighbor_discovery_option_type_t option_type =
1836                             o0->type;
1837
1838                           if (options_len0 < 2)
1839                             {
1840                               ip6_neighbor_syslog (vm, LOG_ERR,
1841                                                    "malformed RA packet on %U from %U",
1842                                                    format_vnet_sw_if_index_name,
1843                                                    vnm, sw_if_index0,
1844                                                    format_ip6_address,
1845                                                    &ip0->src_address);
1846                               break;
1847                             }
1848
1849                           if (opt_len == 0)
1850                             {
1851                               ip6_neighbor_syslog (vm, LOG_ERR,
1852                                                    " zero length option in RA on %U from %U",
1853                                                    format_vnet_sw_if_index_name,
1854                                                    vnm, sw_if_index0,
1855                                                    format_ip6_address,
1856                                                    &ip0->src_address);
1857                               break;
1858                             }
1859                           else if (opt_len > options_len0)
1860                             {
1861                               ip6_neighbor_syslog (vm, LOG_ERR,
1862                                                    "option length in RA packet  greater than total length on %U from %U",
1863                                                    format_vnet_sw_if_index_name,
1864                                                    vnm, sw_if_index0,
1865                                                    format_ip6_address,
1866                                                    &ip0->src_address);
1867                               break;
1868                             }
1869
1870                           options_len0 -= opt_len;
1871                           opt_hdr += opt_len;
1872
1873                           switch (option_type)
1874                             {
1875                             case ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu:
1876                               {
1877                                 icmp6_neighbor_discovery_mtu_option_t *h =
1878                                   (icmp6_neighbor_discovery_mtu_option_t
1879                                    *) (o0);
1880
1881                                 if (opt_len < sizeof (*h))
1882                                   break;
1883
1884                                 if ((h->mtu && radv_info->adv_link_mtu) &&
1885                                     (h->mtu !=
1886                                      clib_host_to_net_u32
1887                                      (radv_info->adv_link_mtu)))
1888                                   {
1889                                     ip6_neighbor_syslog (vm, LOG_WARNING,
1890                                                          "our AdvLinkMTU on %U doesn't agree with %U",
1891                                                          format_vnet_sw_if_index_name,
1892                                                          vnm, sw_if_index0,
1893                                                          format_ip6_address,
1894                                                          &ip0->src_address);
1895                                   }
1896                               }
1897                               break;
1898
1899                             case ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information:
1900                               {
1901                                 icmp6_neighbor_discovery_prefix_information_option_t
1902                                   * h =
1903                                   (icmp6_neighbor_discovery_prefix_information_option_t
1904                                    *) (o0);
1905
1906                                 /* validate advertised prefix options  */
1907                                 ip6_radv_prefix_t *pr_info;
1908                                 u32 preferred, valid;
1909
1910                                 if (opt_len < sizeof (*h))
1911                                   break;
1912
1913                                 preferred =
1914                                   clib_net_to_host_u32 (h->preferred_time);
1915                                 valid = clib_net_to_host_u32 (h->valid_time);
1916
1917                                 /* look for matching prefix - if we our advertising it, it better be consistant */
1918                                 /* *INDENT-OFF* */
1919                                 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
1920                                 ({
1921
1922                                   ip6_address_t mask;
1923                                   ip6_address_mask_from_width(&mask, pr_info->prefix_len);
1924
1925                                   if(pr_info->enabled &&
1926                                      (pr_info->prefix_len == h->dst_address_length) &&
1927                                      ip6_address_is_equal_masked (&pr_info->prefix,  &h->dst_address, &mask))
1928                                     {
1929                                       /* found it */
1930                                       if(!pr_info->decrement_lifetime_flag &&
1931                                          valid != pr_info->adv_valid_lifetime_in_secs)
1932                                         {
1933                                           ip6_neighbor_syslog(vm,  LOG_WARNING,
1934                                                               "our ADV validlifetime on  %U for %U does not  agree with %U",
1935                                                               format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
1936                                                               format_ip6_address, &h->dst_address);
1937                                         }
1938                                       if(!pr_info->decrement_lifetime_flag &&
1939                                          preferred != pr_info->adv_pref_lifetime_in_secs)
1940                                         {
1941                                           ip6_neighbor_syslog(vm,  LOG_WARNING,
1942                                                               "our ADV preferredlifetime on  %U for %U does not  agree with %U",
1943                                                               format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
1944                                                               format_ip6_address, &h->dst_address);
1945                                         }
1946                                     }
1947                                   break;
1948                                 }));
1949                                 /* *INDENT-ON* */
1950                                 break;
1951                               }
1952                             default:
1953                               /* skip this one */
1954                               break;
1955                             }
1956                         }
1957                     }
1958                 }
1959             }
1960
1961           p0->error = error_node->errors[error0];
1962
1963           if (error0 != ICMP6_ERROR_NONE)
1964             vlib_error_count (vm, error_node->node_index, error0, 1);
1965
1966           vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1967                                            to_next, n_left_to_next,
1968                                            bi0, next0);
1969         }
1970
1971       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1972     }
1973
1974   /* Account for router advertisements sent. */
1975   vlib_error_count (vm, error_node->node_index,
1976                     ICMP6_ERROR_ROUTER_ADVERTISEMENTS_RX,
1977                     n_advertisements_rcvd);
1978
1979   return frame->n_vectors;
1980 }
1981
1982 /**
1983  * @brief Add a multicast Address to the advertised MLD set
1984  */
1985 static void
1986 ip6_neighbor_add_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
1987 {
1988   ip6_mldp_group_t *mcast_group_info;
1989   uword *p;
1990
1991   /* lookup  mldp info for this interface */
1992   p = mhash_get (&radv_info->address_to_mldp_index, &addr);
1993   mcast_group_info =
1994     p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
1995
1996   /* add address */
1997   if (!mcast_group_info)
1998     {
1999       /* add */
2000       u32 mi;
2001       pool_get (radv_info->mldp_group_pool, mcast_group_info);
2002
2003       mi = mcast_group_info - radv_info->mldp_group_pool;
2004       mhash_set (&radv_info->address_to_mldp_index, &addr, mi,  /* old_value */
2005                  0);
2006
2007       mcast_group_info->type = 4;
2008       mcast_group_info->mcast_source_address_pool = 0;
2009       mcast_group_info->num_sources = 0;
2010       clib_memcpy (&mcast_group_info->mcast_address, &addr,
2011                    sizeof (ip6_address_t));
2012     }
2013 }
2014
2015 /**
2016  * @brief Delete a multicast Address from the advertised MLD set
2017  */
2018 static void
2019 ip6_neighbor_del_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2020 {
2021   ip6_mldp_group_t *mcast_group_info;
2022   uword *p;
2023
2024   p = mhash_get (&radv_info->address_to_mldp_index, &addr);
2025   mcast_group_info =
2026     p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2027
2028   if (mcast_group_info)
2029     {
2030       mhash_unset (&radv_info->address_to_mldp_index, &addr,
2031                    /* old_value */ 0);
2032       pool_put (radv_info->mldp_group_pool, mcast_group_info);
2033     }
2034 }
2035
2036 /**
2037  * @brief Add a multicast Address to the advertised MLD set
2038  */
2039 static void
2040 ip6_neighbor_add_mld_grp (ip6_radv_t * a,
2041                           ip6_multicast_address_scope_t scope,
2042                           ip6_multicast_link_local_group_id_t group)
2043 {
2044   ip6_address_t addr;
2045
2046   ip6_set_reserved_multicast_address (&addr, scope, group);
2047
2048   ip6_neighbor_add_mld_prefix (a, &addr);
2049 }
2050
2051 /**
2052  * @brief create and initialize router advertisement parameters with default
2053  * values for this intfc
2054  */
2055 static u32
2056 ip6_neighbor_sw_interface_add_del (vnet_main_t * vnm,
2057                                    u32 sw_if_index, u32 is_add)
2058 {
2059   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2060   ip6_radv_t *a = 0;
2061   u32 ri = ~0;
2062   vnet_sw_interface_t *sw_if0;
2063   ethernet_interface_t *eth_if0 = 0;
2064
2065   /* lookup radv container  - ethernet interfaces only */
2066   sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2067   if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2068     eth_if0 = ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
2069
2070   if (!eth_if0)
2071     return ri;
2072
2073   vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2074                            ~0);
2075   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2076
2077   if (ri != ~0)
2078     {
2079       a = pool_elt_at_index (nm->if_radv_pool, ri);
2080
2081       if (!is_add)
2082         {
2083           ip6_radv_prefix_t *p;
2084           ip6_mldp_group_t *m;
2085
2086           /* release the lock on the interface's mcast adj */
2087           adj_unlock (a->mcast_adj_index);
2088
2089           /* clean up prefix and MDP pools */
2090           /* *INDENT-OFF* */
2091           pool_flush(p, a->adv_prefixes_pool,
2092           ({
2093               mhash_unset (&a->address_to_prefix_index, &p->prefix, 0);
2094           }));
2095           pool_flush (m, a->mldp_group_pool,
2096           ({
2097               mhash_unset (&a->address_to_mldp_index, &m->mcast_address, 0);
2098           }));
2099           /* *INDENT-ON* */
2100
2101           pool_free (a->mldp_group_pool);
2102           pool_free (a->adv_prefixes_pool);
2103
2104           mhash_free (&a->address_to_prefix_index);
2105           mhash_free (&a->address_to_mldp_index);
2106
2107           pool_put (nm->if_radv_pool, a);
2108           nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ~0;
2109           ri = ~0;
2110         }
2111     }
2112   else
2113     {
2114       if (is_add)
2115         {
2116           vnet_hw_interface_t *hw_if0;
2117
2118           hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index);
2119
2120           pool_get (nm->if_radv_pool, a);
2121
2122           ri = a - nm->if_radv_pool;
2123           nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ri;
2124
2125           /* initialize default values (most of which are zero) */
2126           memset (a, 0, sizeof (a[0]));
2127
2128           a->sw_if_index = sw_if_index;
2129           a->max_radv_interval = DEF_MAX_RADV_INTERVAL;
2130           a->min_radv_interval = DEF_MIN_RADV_INTERVAL;
2131           a->curr_hop_limit = DEF_CURR_HOP_LIMIT;
2132           a->adv_router_lifetime_in_sec = DEF_DEF_RTR_LIFETIME;
2133
2134           /* send ll address source address option */
2135           a->adv_link_layer_address = 1;
2136
2137           a->min_delay_between_radv = MIN_DELAY_BETWEEN_RAS;
2138           a->max_delay_between_radv = MAX_DELAY_BETWEEN_RAS;
2139           a->max_rtr_default_lifetime = MAX_DEF_RTR_LIFETIME;
2140           a->seed = (u32) clib_cpu_time_now ();
2141           (void) random_u32 (&a->seed);
2142           a->randomizer = clib_cpu_time_now ();
2143           (void) random_u64 (&a->randomizer);
2144
2145           a->initial_adverts_count = MAX_INITIAL_RTR_ADVERTISEMENTS;
2146           a->initial_adverts_sent = a->initial_adverts_count - 1;
2147           a->initial_adverts_interval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
2148
2149           /* deafult is to send */
2150           a->send_radv = 1;
2151
2152           /* fill in radv_info for this interface that will be needed later */
2153           a->adv_link_mtu = hw_if0->max_l3_packet_bytes[VLIB_RX];
2154
2155           clib_memcpy (a->link_layer_address, eth_if0->address, 6);
2156
2157           /* fill in default link-local address  (this may be overridden) */
2158           ip6_link_local_address_from_ethernet_address
2159             (&a->link_local_address, eth_if0->address);
2160
2161           mhash_init (&a->address_to_prefix_index, sizeof (uword),
2162                       sizeof (ip6_address_t));
2163           mhash_init (&a->address_to_mldp_index, sizeof (uword),
2164                       sizeof (ip6_address_t));
2165
2166           a->mcast_adj_index = adj_mcast_add_or_lock (FIB_PROTOCOL_IP6,
2167                                                       VNET_LINK_IP6,
2168                                                       sw_if_index);
2169
2170           /* add multicast groups we will always be reporting  */
2171           ip6_neighbor_add_mld_grp (a,
2172                                     IP6_MULTICAST_SCOPE_link_local,
2173                                     IP6_MULTICAST_GROUP_ID_all_hosts);
2174           ip6_neighbor_add_mld_grp (a,
2175                                     IP6_MULTICAST_SCOPE_link_local,
2176                                     IP6_MULTICAST_GROUP_ID_all_routers);
2177           ip6_neighbor_add_mld_grp (a,
2178                                     IP6_MULTICAST_SCOPE_link_local,
2179                                     IP6_MULTICAST_GROUP_ID_mldv2_routers);
2180         }
2181     }
2182   return ri;
2183 }
2184
2185 /* send an mldpv2 report  */
2186 static void
2187 ip6_neighbor_send_mldpv2_report (u32 sw_if_index)
2188 {
2189   vnet_main_t *vnm = vnet_get_main ();
2190   vlib_main_t *vm = vnm->vlib_main;
2191   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2192   vnet_sw_interface_t *sw_if0;
2193   ethernet_interface_t *eth_if0;
2194   u32 ri;
2195   int bogus_length;
2196
2197   ip6_radv_t *radv_info;
2198   u16 payload_length;
2199   vlib_buffer_t *b0;
2200   ip6_header_t *ip0;
2201   u32 *to_next;
2202   vlib_frame_t *f;
2203   u32 bo0;
2204   u32 n_to_alloc = 1;
2205   u32 n_allocated;
2206
2207   icmp6_multicast_listener_report_header_t *rh0;
2208   icmp6_multicast_listener_report_packet_t *rp0;
2209
2210   sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2211   ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
2212   eth_if0 = ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
2213
2214   if (!eth_if0 || !vnet_sw_interface_is_admin_up (vnm, sw_if_index))
2215     return;
2216
2217   /* look up the radv_t  information for this interface */
2218   vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2219                            ~0);
2220
2221   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2222
2223   if (ri == ~0)
2224     return;
2225
2226   /* send report now - build a mldpv2 report packet  */
2227   n_allocated = vlib_buffer_alloc_from_free_list (vm,
2228                                                   &bo0,
2229                                                   n_to_alloc,
2230                                                   VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2231   if (PREDICT_FALSE (n_allocated == 0))
2232     {
2233       clib_warning ("buffer allocation failure");
2234       return;
2235     }
2236
2237   b0 = vlib_get_buffer (vm, bo0);
2238
2239   /* adjust the sizeof the buffer to just include the ipv6 header */
2240   b0->current_length = sizeof (icmp6_multicast_listener_report_packet_t);
2241
2242   payload_length = sizeof (icmp6_multicast_listener_report_header_t);
2243
2244   b0->error = ICMP6_ERROR_NONE;
2245
2246   rp0 = vlib_buffer_get_current (b0);
2247   ip0 = (ip6_header_t *) & rp0->ip;
2248   rh0 = (icmp6_multicast_listener_report_header_t *) & rp0->report_hdr;
2249
2250   memset (rp0, 0x0, sizeof (icmp6_multicast_listener_report_packet_t));
2251
2252   ip0->ip_version_traffic_class_and_flow_label =
2253     clib_host_to_net_u32 (0x6 << 28);
2254
2255   ip0->protocol = IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS;
2256   /* for DEBUG - vnet driver won't seem to emit router alerts */
2257   /* ip0->protocol = IP_PROTOCOL_ICMP6; */
2258   ip0->hop_limit = 1;
2259
2260   rh0->icmp.type = ICMP6_multicast_listener_report_v2;
2261
2262   /* source address MUST be the link-local address */
2263   radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2264   ip0->src_address = radv_info->link_local_address;
2265
2266   /* destination is all mldpv2 routers */
2267   ip6_set_reserved_multicast_address (&ip0->dst_address,
2268                                       IP6_MULTICAST_SCOPE_link_local,
2269                                       IP6_MULTICAST_GROUP_ID_mldv2_routers);
2270
2271   /* add reports here */
2272   ip6_mldp_group_t *m;
2273   int num_addr_records = 0;
2274   icmp6_multicast_address_record_t rr;
2275
2276   /* fill in the hop-by-hop extension header (router alert) info */
2277   rh0->ext_hdr.next_hdr = IP_PROTOCOL_ICMP6;
2278   rh0->ext_hdr.n_data_u64s = 0;
2279
2280   rh0->alert.type = IP6_MLDP_ALERT_TYPE;
2281   rh0->alert.len = 2;
2282   rh0->alert.value = 0;
2283
2284   rh0->pad.type = 1;
2285   rh0->pad.len = 0;
2286
2287   rh0->icmp.checksum = 0;
2288
2289   /* *INDENT-OFF* */
2290   pool_foreach (m, radv_info->mldp_group_pool,
2291   ({
2292     rr.type = m->type;
2293     rr.aux_data_len_u32s = 0;
2294     rr.num_sources = clib_host_to_net_u16 (m->num_sources);
2295     clib_memcpy(&rr.mcast_addr, &m->mcast_address, sizeof(ip6_address_t));
2296
2297     num_addr_records++;
2298
2299     vlib_buffer_add_data
2300       (vm, b0->free_list_index, bo0,
2301        (void *)&rr, sizeof(icmp6_multicast_address_record_t));
2302
2303     payload_length += sizeof( icmp6_multicast_address_record_t);
2304   }));
2305   /* *INDENT-ON* */
2306
2307   rh0->rsvd = 0;
2308   rh0->num_addr_records = clib_host_to_net_u16 (num_addr_records);
2309
2310   /* update lengths */
2311   ip0->payload_length = clib_host_to_net_u16 (payload_length);
2312
2313   rh0->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0,
2314                                                           &bogus_length);
2315   ASSERT (bogus_length == 0);
2316
2317   /*
2318    * OK to override w/ no regard for actual FIB, because
2319    * ip6-rewrite only looks at the adjacency.
2320    */
2321   vnet_buffer (b0)->sw_if_index[VLIB_RX] =
2322     vnet_main.local_interface_sw_if_index;
2323
2324   vnet_buffer (b0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
2325   b0->flags |= VNET_BUFFER_LOCALLY_ORIGINATED;
2326
2327   vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite-mcast");
2328
2329   f = vlib_get_frame_to_node (vm, node->index);
2330   to_next = vlib_frame_vector_args (f);
2331   to_next[0] = bo0;
2332   f->n_vectors = 1;
2333
2334   vlib_put_frame_to_node (vm, node->index, f);
2335   return;
2336 }
2337
2338 /* *INDENT-OFF* */
2339 VLIB_REGISTER_NODE (ip6_icmp_router_solicitation_node,static) =
2340 {
2341   .function = icmp6_router_solicitation,
2342   .name = "icmp6-router-solicitation",
2343
2344   .vector_size = sizeof (u32),
2345
2346   .format_trace = format_icmp6_input_trace,
2347
2348   .n_next_nodes = ICMP6_ROUTER_SOLICITATION_N_NEXT,
2349   .next_nodes = {
2350     [ICMP6_ROUTER_SOLICITATION_NEXT_DROP] = "error-drop",
2351     [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW] = "ip6-rewrite-mcast",
2352     [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX] = "interface-output",
2353   },
2354 };
2355 /* *INDENT-ON* */
2356
2357 /* send a RA or update the timer info etc.. */
2358 static uword
2359 ip6_neighbor_process_timer_event (vlib_main_t * vm,
2360                                   vlib_node_runtime_t * node,
2361                                   vlib_frame_t * frame)
2362 {
2363   vnet_main_t *vnm = vnet_get_main ();
2364   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2365   ip6_radv_t *radv_info;
2366   vlib_frame_t *f = 0;
2367   u32 n_this_frame = 0;
2368   u32 n_left_to_next = 0;
2369   u32 *to_next = 0;
2370   u32 bo0;
2371   icmp6_router_solicitation_header_t *h0;
2372   vlib_buffer_t *b0;
2373   f64 now = vlib_time_now (vm);
2374
2375   /* Interface ip6 radv info list */
2376   /* *INDENT-OFF* */
2377   pool_foreach (radv_info, nm->if_radv_pool,
2378   ({
2379     if( !vnet_sw_interface_is_admin_up (vnm, radv_info->sw_if_index))
2380       {
2381         radv_info->initial_adverts_sent = radv_info->initial_adverts_count-1;
2382         radv_info->next_multicast_time = now;
2383         radv_info->last_multicast_time = now;
2384         radv_info->last_radv_time = 0;
2385         radv_info->all_routers_mcast = 0;
2386         continue;
2387       }
2388
2389     /* Make sure that we've joined the all-routers multicast group */
2390     if(!radv_info->all_routers_mcast)
2391       {
2392         /* send MDLP_REPORT_EVENT message */
2393         ip6_neighbor_send_mldpv2_report(radv_info->sw_if_index);
2394         radv_info->all_routers_mcast = 1;
2395       }
2396
2397     /* is it time to send a multicast  RA on this interface? */
2398     if(radv_info->send_radv && (now >=  radv_info->next_multicast_time))
2399       {
2400         u32 n_to_alloc = 1;
2401         u32 n_allocated;
2402
2403         f64 rfn = (radv_info->max_radv_interval - radv_info->min_radv_interval) *
2404           random_f64 (&radv_info->seed) + radv_info->min_radv_interval;
2405
2406         /* multicast send - compute next multicast send time */
2407         if( radv_info->initial_adverts_sent > 0)
2408           {
2409             radv_info->initial_adverts_sent--;
2410             if(rfn > radv_info-> initial_adverts_interval)
2411               rfn =  radv_info-> initial_adverts_interval;
2412
2413             /* check to see if we are ceasing to send */
2414             if( radv_info->initial_adverts_sent  == 0)
2415               if(radv_info->cease_radv)
2416                 radv_info->send_radv = 0;
2417           }
2418
2419         radv_info->next_multicast_time =  rfn + now;
2420         radv_info->last_multicast_time = now;
2421
2422         /* send advert now - build a "solicted" router advert with unspecified source address */
2423         n_allocated = vlib_buffer_alloc_from_free_list
2424           (vm, &bo0, n_to_alloc, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2425
2426         if (PREDICT_FALSE(n_allocated == 0))
2427           {
2428             clib_warning ("buffer allocation failure");
2429             continue;
2430           }
2431         b0 = vlib_get_buffer (vm, bo0);
2432         b0->current_length = sizeof( icmp6_router_solicitation_header_t);
2433         b0->error = ICMP6_ERROR_NONE;
2434         vnet_buffer (b0)->sw_if_index[VLIB_RX] = radv_info->sw_if_index;
2435
2436         h0 =  vlib_buffer_get_current (b0);
2437
2438         memset (h0, 0, sizeof (icmp6_router_solicitation_header_t));
2439
2440         h0->ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2441         h0->ip.payload_length = clib_host_to_net_u16 (sizeof (icmp6_router_solicitation_header_t)
2442                                                       - STRUCT_OFFSET_OF (icmp6_router_solicitation_header_t, neighbor));
2443         h0->ip.protocol = IP_PROTOCOL_ICMP6;
2444         h0->ip.hop_limit = 255;
2445
2446         /* set src/dst address as "unspecified" this marks this packet as internally generated rather than recieved */
2447         h0->ip.src_address.as_u64[0] = 0;
2448         h0->ip.src_address.as_u64[1] = 0;
2449
2450         h0->ip.dst_address.as_u64[0] = 0;
2451         h0->ip.dst_address.as_u64[1] = 0;
2452
2453         h0->neighbor.icmp.type = ICMP6_router_solicitation;
2454
2455         if (PREDICT_FALSE(f == 0))
2456           {
2457             f = vlib_get_frame_to_node (vm, ip6_icmp_router_solicitation_node.index);
2458             to_next = vlib_frame_vector_args (f);
2459             n_left_to_next = VLIB_FRAME_SIZE;
2460             n_this_frame = 0;
2461           }
2462
2463         n_this_frame++;
2464         n_left_to_next--;
2465         to_next[0] = bo0;
2466         to_next += 1;
2467
2468         if (PREDICT_FALSE(n_left_to_next == 0))
2469           {
2470             f->n_vectors = n_this_frame;
2471             vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2472             f = 0;
2473           }
2474       }
2475   }));
2476   /* *INDENT-ON* */
2477
2478   if (f)
2479     {
2480       ASSERT (n_this_frame);
2481       f->n_vectors = n_this_frame;
2482       vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2483     }
2484   return 0;
2485 }
2486
2487 static uword
2488 ip6_icmp_neighbor_discovery_event_process (vlib_main_t * vm,
2489                                            vlib_node_runtime_t * node,
2490                                            vlib_frame_t * frame)
2491 {
2492   uword event_type;
2493   ip6_icmp_neighbor_discovery_event_data_t *event_data;
2494
2495   /* init code here */
2496
2497   while (1)
2498     {
2499       vlib_process_wait_for_event_or_clock (vm, 1. /* seconds */ );
2500
2501       event_data = vlib_process_get_event_data (vm, &event_type);
2502
2503       if (!event_data)
2504         {
2505           /* No events found: timer expired. */
2506           /* process interface list and send RAs as appropriate, update timer info */
2507           ip6_neighbor_process_timer_event (vm, node, frame);
2508         }
2509       else
2510         {
2511           switch (event_type)
2512             {
2513
2514             case ICMP6_ND_EVENT_INIT:
2515               break;
2516
2517             case ~0:
2518               break;
2519
2520             default:
2521               ASSERT (0);
2522             }
2523
2524           if (event_data)
2525             _vec_len (event_data) = 0;
2526         }
2527     }
2528   return frame->n_vectors;
2529 }
2530
2531 /* *INDENT-OFF* */
2532 VLIB_REGISTER_NODE (ip6_icmp_router_advertisement_node,static) =
2533 {
2534   .function = icmp6_router_advertisement,
2535   .name = "icmp6-router-advertisement",
2536
2537   .vector_size = sizeof (u32),
2538
2539   .format_trace = format_icmp6_input_trace,
2540
2541   .n_next_nodes = 1,
2542   .next_nodes = {
2543     [0] = "error-drop",
2544   },
2545 };
2546 /* *INDENT-ON* */
2547
2548 vlib_node_registration_t ip6_icmp_neighbor_discovery_event_node = {
2549
2550   .function = ip6_icmp_neighbor_discovery_event_process,
2551   .name = "ip6-icmp-neighbor-discovery-event-process",
2552   .type = VLIB_NODE_TYPE_PROCESS,
2553 };
2554
2555 static uword
2556 icmp6_neighbor_solicitation (vlib_main_t * vm,
2557                              vlib_node_runtime_t * node, vlib_frame_t * frame)
2558 {
2559   return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
2560                                                        /* is_solicitation */
2561                                                        1);
2562 }
2563
2564 static uword
2565 icmp6_neighbor_advertisement (vlib_main_t * vm,
2566                               vlib_node_runtime_t * node,
2567                               vlib_frame_t * frame)
2568 {
2569   return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
2570                                                        /* is_solicitation */
2571                                                        0);
2572 }
2573
2574 /* *INDENT-OFF* */
2575 VLIB_REGISTER_NODE (ip6_icmp_neighbor_solicitation_node,static) =
2576 {
2577   .function = icmp6_neighbor_solicitation,
2578   .name = "icmp6-neighbor-solicitation",
2579
2580   .vector_size = sizeof (u32),
2581
2582   .format_trace = format_icmp6_input_trace,
2583
2584   .n_next_nodes = ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
2585   .next_nodes = {
2586     [ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP] = "error-drop",
2587     [ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY] = "interface-output",
2588   },
2589 };
2590 /* *INDENT-ON* */
2591
2592 /* *INDENT-OFF* */
2593 VLIB_REGISTER_NODE (ip6_icmp_neighbor_advertisement_node,static) =
2594 {
2595   .function = icmp6_neighbor_advertisement,
2596   .name = "icmp6-neighbor-advertisement",
2597
2598   .vector_size = sizeof (u32),
2599
2600   .format_trace = format_icmp6_input_trace,
2601
2602   .n_next_nodes = 1,
2603   .next_nodes = {
2604     [0] = "error-drop",
2605   },
2606 };
2607 /* *INDENT-ON* */
2608
2609 /* API support functions */
2610 int
2611 ip6_neighbor_ra_config (vlib_main_t * vm, u32 sw_if_index,
2612                         u8 suppress, u8 managed, u8 other,
2613                         u8 ll_option, u8 send_unicast, u8 cease,
2614                         u8 use_lifetime, u32 lifetime,
2615                         u32 initial_count, u32 initial_interval,
2616                         u32 max_interval, u32 min_interval, u8 is_no)
2617 {
2618   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2619   int error;
2620   u32 ri;
2621
2622   /* look up the radv_t  information for this interface */
2623   vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2624                            ~0);
2625   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2626   error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
2627
2628   if (!error)
2629     {
2630
2631       ip6_radv_t *radv_info;
2632       radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2633
2634       if ((max_interval != 0) && (min_interval == 0))
2635         min_interval = .75 * max_interval;
2636
2637       max_interval =
2638         (max_interval !=
2639          0) ? ((is_no) ? DEF_MAX_RADV_INTERVAL : max_interval) :
2640         radv_info->max_radv_interval;
2641       min_interval =
2642         (min_interval !=
2643          0) ? ((is_no) ? DEF_MIN_RADV_INTERVAL : min_interval) :
2644         radv_info->min_radv_interval;
2645       lifetime =
2646         (use_lifetime !=
2647          0) ? ((is_no) ? DEF_DEF_RTR_LIFETIME : lifetime) :
2648         radv_info->adv_router_lifetime_in_sec;
2649
2650       if (lifetime)
2651         {
2652           if (lifetime > MAX_DEF_RTR_LIFETIME)
2653             lifetime = MAX_DEF_RTR_LIFETIME;
2654
2655           if (lifetime <= max_interval)
2656             return VNET_API_ERROR_INVALID_VALUE;
2657         }
2658
2659       if (min_interval != 0)
2660         {
2661           if ((min_interval > .75 * max_interval) || (min_interval < 3))
2662             return VNET_API_ERROR_INVALID_VALUE;
2663         }
2664
2665       if ((initial_count > MAX_INITIAL_RTR_ADVERTISEMENTS) ||
2666           (initial_interval > MAX_INITIAL_RTR_ADVERT_INTERVAL))
2667         return VNET_API_ERROR_INVALID_VALUE;
2668
2669       /*
2670          if "flag" is set and is_no is true then restore default value else set value corresponding to "flag"
2671          if "flag" is clear  don't change corresponding value
2672        */
2673       radv_info->send_radv =
2674         (suppress != 0) ? ((is_no != 0) ? 1 : 0) : radv_info->send_radv;
2675       radv_info->adv_managed_flag =
2676         (managed != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_managed_flag;
2677       radv_info->adv_other_flag =
2678         (other != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_other_flag;
2679       radv_info->adv_link_layer_address =
2680         (ll_option !=
2681          0) ? ((is_no) ? 1 : 0) : radv_info->adv_link_layer_address;
2682       radv_info->send_unicast =
2683         (send_unicast != 0) ? ((is_no) ? 0 : 1) : radv_info->send_unicast;
2684       radv_info->cease_radv =
2685         (cease != 0) ? ((is_no) ? 0 : 1) : radv_info->cease_radv;
2686
2687       radv_info->min_radv_interval = min_interval;
2688       radv_info->max_radv_interval = max_interval;
2689       radv_info->adv_router_lifetime_in_sec = lifetime;
2690
2691       radv_info->initial_adverts_count =
2692         (initial_count !=
2693          0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERTISEMENTS : initial_count) :
2694         radv_info->initial_adverts_count;
2695       radv_info->initial_adverts_interval =
2696         (initial_interval !=
2697          0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERT_INTERVAL : initial_interval) :
2698         radv_info->initial_adverts_interval;
2699
2700       /* restart */
2701       if ((cease != 0) && (is_no))
2702         radv_info->send_radv = 1;
2703
2704       radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
2705       radv_info->next_multicast_time = vlib_time_now (vm);
2706       radv_info->last_multicast_time = vlib_time_now (vm);
2707       radv_info->last_radv_time = 0;
2708     }
2709   return (error);
2710 }
2711
2712 int
2713 ip6_neighbor_ra_prefix (vlib_main_t * vm, u32 sw_if_index,
2714                         ip6_address_t * prefix_addr, u8 prefix_len,
2715                         u8 use_default, u32 val_lifetime, u32 pref_lifetime,
2716                         u8 no_advertise, u8 off_link, u8 no_autoconfig,
2717                         u8 no_onlink, u8 is_no)
2718 {
2719   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2720   int error;
2721
2722   u32 ri;
2723
2724   /* look up the radv_t  information for this interface */
2725   vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2726                            ~0);
2727
2728   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2729
2730   error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
2731
2732   if (!error)
2733     {
2734       f64 now = vlib_time_now (vm);
2735       ip6_radv_t *radv_info;
2736       radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2737
2738       /* prefix info add, delete or update */
2739       ip6_radv_prefix_t *prefix;
2740
2741       /* lookup  prefix info for this  address on this interface */
2742       uword *p = mhash_get (&radv_info->address_to_prefix_index, prefix_addr);
2743
2744       prefix = p ? pool_elt_at_index (radv_info->adv_prefixes_pool, p[0]) : 0;
2745
2746       if (is_no)
2747         {
2748           /* delete */
2749           if (!prefix)
2750             return VNET_API_ERROR_INVALID_VALUE;        /* invalid prefix */
2751
2752           if (prefix->prefix_len != prefix_len)
2753             return VNET_API_ERROR_INVALID_VALUE_2;
2754
2755           /* FIXME - Should the DP do this or the CP ? */
2756           /* do specific delete processing here before returning */
2757           /* try to remove from routing table */
2758
2759           mhash_unset (&radv_info->address_to_prefix_index, prefix_addr,
2760                        /* old_value */ 0);
2761           pool_put (radv_info->adv_prefixes_pool, prefix);
2762
2763           radv_info->initial_adverts_sent =
2764             radv_info->initial_adverts_count - 1;
2765           radv_info->next_multicast_time = vlib_time_now (vm);
2766           radv_info->last_multicast_time = vlib_time_now (vm);
2767           radv_info->last_radv_time = 0;
2768           return (error);
2769         }
2770
2771       /* adding or changing */
2772       if (!prefix)
2773         {
2774           /* add */
2775           u32 pi;
2776           pool_get (radv_info->adv_prefixes_pool, prefix);
2777           pi = prefix - radv_info->adv_prefixes_pool;
2778           mhash_set (&radv_info->address_to_prefix_index, prefix_addr, pi,
2779                      /* old_value */ 0);
2780
2781           memset (prefix, 0x0, sizeof (ip6_radv_prefix_t));
2782
2783           prefix->prefix_len = prefix_len;
2784           clib_memcpy (&prefix->prefix, prefix_addr, sizeof (ip6_address_t));
2785
2786           /* initialize default values */
2787           prefix->adv_on_link_flag = 1; /* L bit set */
2788           prefix->adv_autonomous_flag = 1;      /* A bit set */
2789           prefix->adv_valid_lifetime_in_secs = DEF_ADV_VALID_LIFETIME;
2790           prefix->adv_pref_lifetime_in_secs = DEF_ADV_PREF_LIFETIME;
2791           prefix->enabled = 1;
2792           prefix->decrement_lifetime_flag = 1;
2793           prefix->deprecated_prefix_flag = 1;
2794
2795           if (off_link == 0)
2796             {
2797               /* FIXME - Should the DP do this or the CP ? */
2798               /* insert prefix into routing table as a connected prefix */
2799             }
2800
2801           if (use_default)
2802             goto restart;
2803         }
2804       else
2805         {
2806
2807           if (prefix->prefix_len != prefix_len)
2808             return VNET_API_ERROR_INVALID_VALUE_2;
2809
2810           if (off_link != 0)
2811             {
2812               /* FIXME - Should the DP do this or the CP ? */
2813               /* remove from routing table if already there */
2814             }
2815         }
2816
2817       if ((val_lifetime == ~0) || (pref_lifetime == ~0))
2818         {
2819           prefix->adv_valid_lifetime_in_secs = ~0;
2820           prefix->adv_pref_lifetime_in_secs = ~0;
2821           prefix->decrement_lifetime_flag = 0;
2822         }
2823       else
2824         {
2825           prefix->adv_valid_lifetime_in_secs = val_lifetime;;
2826           prefix->adv_pref_lifetime_in_secs = pref_lifetime;
2827         }
2828
2829       /* copy  remaining */
2830       prefix->enabled = !(no_advertise != 0);
2831       prefix->adv_on_link_flag = !((off_link != 0) || (no_onlink != 0));
2832       prefix->adv_autonomous_flag = !(no_autoconfig != 0);
2833
2834     restart:
2835       /* restart */
2836       /* fill in the expiration times  */
2837       prefix->valid_lifetime_expires =
2838         now + prefix->adv_valid_lifetime_in_secs;
2839       prefix->pref_lifetime_expires = now + prefix->adv_pref_lifetime_in_secs;
2840
2841       radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
2842       radv_info->next_multicast_time = vlib_time_now (vm);
2843       radv_info->last_multicast_time = vlib_time_now (vm);
2844       radv_info->last_radv_time = 0;
2845     }
2846   return (error);
2847 }
2848
2849 clib_error_t *
2850 ip6_neighbor_cmd (vlib_main_t * vm, unformat_input_t * main_input,
2851                   vlib_cli_command_t * cmd)
2852 {
2853   vnet_main_t *vnm = vnet_get_main ();
2854   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2855   clib_error_t *error = 0;
2856   u8 is_no = 0;
2857   u8 suppress = 0, managed = 0, other = 0;
2858   u8 suppress_ll_option = 0, send_unicast = 0, cease = 0;
2859   u8 use_lifetime = 0;
2860   u32 sw_if_index, ra_lifetime = 0, ra_initial_count =
2861     0, ra_initial_interval = 0;
2862   u32 ra_max_interval = 0, ra_min_interval = 0;
2863
2864   unformat_input_t _line_input, *line_input = &_line_input;
2865   vnet_sw_interface_t *sw_if0;
2866
2867   int add_radv_info = 1;
2868   __attribute__ ((unused)) ip6_radv_t *radv_info = 0;
2869   ip6_address_t ip6_addr;
2870   u32 addr_len;
2871
2872
2873   /* Get a line of input. */
2874   if (!unformat_user (main_input, unformat_line_input, line_input))
2875     return 0;
2876
2877   /* get basic radv info for this interface */
2878   if (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2879     {
2880
2881       if (unformat_user (line_input,
2882                          unformat_vnet_sw_interface, vnm, &sw_if_index))
2883         {
2884           u32 ri;
2885           ethernet_interface_t *eth_if0 = 0;
2886
2887           sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2888           if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2889             eth_if0 =
2890               ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
2891
2892           if (!eth_if0)
2893             {
2894               error =
2895                 clib_error_return (0, "Interface must be of ethernet type");
2896               goto done;
2897             }
2898
2899           /* look up the radv_t  information for this interface */
2900           vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
2901                                    sw_if_index, ~0);
2902
2903           ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2904
2905           if (ri != ~0)
2906             {
2907               radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2908             }
2909           else
2910             {
2911               error = clib_error_return (0, "unknown interface %U'",
2912                                          format_unformat_error, line_input);
2913               goto done;
2914             }
2915         }
2916       else
2917         {
2918           error = clib_error_return (0, "invalid interface name %U'",
2919                                      format_unformat_error, line_input);
2920           goto done;
2921         }
2922     }
2923
2924   /* get the rest of the command */
2925   while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2926     {
2927       if (unformat (line_input, "no"))
2928         is_no = 1;
2929       else if (unformat (line_input, "prefix %U/%d",
2930                          unformat_ip6_address, &ip6_addr, &addr_len))
2931         {
2932           add_radv_info = 0;
2933           break;
2934         }
2935       else if (unformat (line_input, "ra-managed-config-flag"))
2936         {
2937           managed = 1;
2938           break;
2939         }
2940       else if (unformat (line_input, "ra-other-config-flag"))
2941         {
2942           other = 1;
2943           break;
2944         }
2945       else if (unformat (line_input, "ra-suppress") ||
2946                unformat (line_input, "ra-surpress"))
2947         {
2948           suppress = 1;
2949           break;
2950         }
2951       else if (unformat (line_input, "ra-suppress-link-layer") ||
2952                unformat (line_input, "ra-surpress-link-layer"))
2953         {
2954           suppress_ll_option = 1;
2955           break;
2956         }
2957       else if (unformat (line_input, "ra-send-unicast"))
2958         {
2959           send_unicast = 1;
2960           break;
2961         }
2962       else if (unformat (line_input, "ra-lifetime"))
2963         {
2964           if (!unformat (line_input, "%d", &ra_lifetime))
2965             {
2966               error = unformat_parse_error (line_input);
2967               goto done;
2968             }
2969           use_lifetime = 1;
2970           break;
2971         }
2972       else if (unformat (line_input, "ra-initial"))
2973         {
2974           if (!unformat
2975               (line_input, "%d %d", &ra_initial_count, &ra_initial_interval))
2976             {
2977               error = unformat_parse_error (line_input);
2978               goto done;
2979             }
2980           break;
2981         }
2982       else if (unformat (line_input, "ra-interval"))
2983         {
2984           if (!unformat (line_input, "%d", &ra_max_interval))
2985             {
2986               error = unformat_parse_error (line_input);
2987               goto done;
2988             }
2989
2990           if (!unformat (line_input, "%d", &ra_min_interval))
2991             ra_min_interval = 0;
2992           break;
2993         }
2994       else if (unformat (line_input, "ra-cease"))
2995         {
2996           cease = 1;
2997           break;
2998         }
2999       else
3000         {
3001           error = unformat_parse_error (line_input);
3002           goto done;
3003         }
3004     }
3005
3006   if (add_radv_info)
3007     {
3008       ip6_neighbor_ra_config (vm, sw_if_index,
3009                               suppress, managed, other,
3010                               suppress_ll_option, send_unicast, cease,
3011                               use_lifetime, ra_lifetime,
3012                               ra_initial_count, ra_initial_interval,
3013                               ra_max_interval, ra_min_interval, is_no);
3014     }
3015   else
3016     {
3017       u32 valid_lifetime_in_secs = 0;
3018       u32 pref_lifetime_in_secs = 0;
3019       u8 use_prefix_default_values = 0;
3020       u8 no_advertise = 0;
3021       u8 off_link = 0;
3022       u8 no_autoconfig = 0;
3023       u8 no_onlink = 0;
3024
3025       /* get the rest of the command */
3026       while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3027         {
3028           if (unformat (line_input, "default"))
3029             {
3030               use_prefix_default_values = 1;
3031               break;
3032             }
3033           else if (unformat (line_input, "infinite"))
3034             {
3035               valid_lifetime_in_secs = ~0;
3036               pref_lifetime_in_secs = ~0;
3037               break;
3038             }
3039           else if (unformat (line_input, "%d %d", &valid_lifetime_in_secs,
3040                              &pref_lifetime_in_secs))
3041             break;
3042           else
3043             break;
3044         }
3045
3046
3047       /* get the rest of the command */
3048       while (!use_prefix_default_values &&
3049              unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3050         {
3051           if (unformat (line_input, "no-advertise"))
3052             no_advertise = 1;
3053           else if (unformat (line_input, "off-link"))
3054             off_link = 1;
3055           else if (unformat (line_input, "no-autoconfig"))
3056             no_autoconfig = 1;
3057           else if (unformat (line_input, "no-onlink"))
3058             no_onlink = 1;
3059           else
3060             {
3061               error = unformat_parse_error (line_input);
3062               goto done;
3063             }
3064         }
3065
3066       ip6_neighbor_ra_prefix (vm, sw_if_index,
3067                               &ip6_addr, addr_len,
3068                               use_prefix_default_values,
3069                               valid_lifetime_in_secs,
3070                               pref_lifetime_in_secs,
3071                               no_advertise,
3072                               off_link, no_autoconfig, no_onlink, is_no);
3073     }
3074
3075 done:
3076   unformat_free (line_input);
3077
3078   return error;
3079 }
3080
3081 static void
3082 ip6_print_addrs (vlib_main_t * vm, u32 * addrs)
3083 {
3084   ip_lookup_main_t *lm = &ip6_main.lookup_main;
3085   u32 i;
3086
3087   for (i = 0; i < vec_len (addrs); i++)
3088     {
3089       ip_interface_address_t *a =
3090         pool_elt_at_index (lm->if_address_pool, addrs[i]);
3091       ip6_address_t *address = ip_interface_address_get_address (lm, a);
3092
3093       vlib_cli_output (vm, "\t\t%U/%d",
3094                        format_ip6_address, address, a->address_length);
3095     }
3096 }
3097
3098 static clib_error_t *
3099 show_ip6_interface_cmd (vlib_main_t * vm,
3100                         unformat_input_t * input, vlib_cli_command_t * cmd)
3101 {
3102   vnet_main_t *vnm = vnet_get_main ();
3103   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3104   clib_error_t *error = 0;
3105   u32 sw_if_index;
3106
3107   sw_if_index = ~0;
3108
3109   if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3110     {
3111       u32 ri;
3112
3113       /* look up the radv_t  information for this interface */
3114       vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3115                                sw_if_index, ~0);
3116
3117       ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3118
3119       if (ri != ~0)
3120         {
3121           ip_lookup_main_t *lm = &ip6_main.lookup_main;
3122           ip6_radv_t *radv_info;
3123           radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3124
3125           vlib_cli_output (vm, "%U is admin %s\n",
3126                            format_vnet_sw_interface_name, vnm,
3127                            vnet_get_sw_interface (vnm, sw_if_index),
3128                            (vnet_sw_interface_is_admin_up (vnm, sw_if_index) ?
3129                             "up" : "down"));
3130
3131           u32 ai;
3132           u32 *link_scope = 0, *global_scope = 0;
3133           u32 *local_scope = 0, *unknown_scope = 0;
3134           ip_interface_address_t *a;
3135
3136           vec_validate_init_empty (lm->if_address_pool_index_by_sw_if_index,
3137                                    sw_if_index, ~0);
3138           ai = lm->if_address_pool_index_by_sw_if_index[sw_if_index];
3139
3140           while (ai != (u32) ~ 0)
3141             {
3142               a = pool_elt_at_index (lm->if_address_pool, ai);
3143               ip6_address_t *address =
3144                 ip_interface_address_get_address (lm, a);
3145
3146               if (ip6_address_is_link_local_unicast (address))
3147                 vec_add1 (link_scope, ai);
3148               else if (ip6_address_is_global_unicast (address))
3149                 vec_add1 (global_scope, ai);
3150               else if (ip6_address_is_local_unicast (address))
3151                 vec_add1 (local_scope, ai);
3152               else
3153                 vec_add1 (unknown_scope, ai);
3154
3155               ai = a->next_this_sw_interface;
3156             }
3157
3158           if (vec_len (link_scope))
3159             {
3160               vlib_cli_output (vm, "\tLink-local address(es):\n");
3161               ip6_print_addrs (vm, link_scope);
3162               vec_free (link_scope);
3163             }
3164
3165           if (vec_len (local_scope))
3166             {
3167               vlib_cli_output (vm, "\tLocal unicast address(es):\n");
3168               ip6_print_addrs (vm, local_scope);
3169               vec_free (local_scope);
3170             }
3171
3172           if (vec_len (global_scope))
3173             {
3174               vlib_cli_output (vm, "\tGlobal unicast address(es):\n");
3175               ip6_print_addrs (vm, global_scope);
3176               vec_free (global_scope);
3177             }
3178
3179           if (vec_len (unknown_scope))
3180             {
3181               vlib_cli_output (vm, "\tOther-scope address(es):\n");
3182               ip6_print_addrs (vm, unknown_scope);
3183               vec_free (unknown_scope);
3184             }
3185
3186           vlib_cli_output (vm, "\tJoined group address(es):\n");
3187           ip6_mldp_group_t *m;
3188           /* *INDENT-OFF* */
3189           pool_foreach (m, radv_info->mldp_group_pool,
3190           ({
3191             vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
3192                              &m->mcast_address);
3193           }));
3194           /* *INDENT-ON* */
3195
3196           vlib_cli_output (vm, "\tAdvertised Prefixes:\n");
3197           ip6_radv_prefix_t *p;
3198           /* *INDENT-OFF* */
3199           pool_foreach (p, radv_info->adv_prefixes_pool,
3200           ({
3201             vlib_cli_output (vm, "\t\tprefix %U,  length %d\n",
3202                              format_ip6_address, &p->prefix, p->prefix_len);
3203           }));
3204           /* *INDENT-ON* */
3205
3206           vlib_cli_output (vm, "\tMTU is %d\n", radv_info->adv_link_mtu);
3207           vlib_cli_output (vm, "\tICMP error messages are unlimited\n");
3208           vlib_cli_output (vm, "\tICMP redirects are disabled\n");
3209           vlib_cli_output (vm, "\tICMP unreachables are not sent\n");
3210           vlib_cli_output (vm, "\tND DAD is disabled\n");
3211           //vlib_cli_output (vm, "\tND reachable time is %d milliseconds\n",);
3212           vlib_cli_output (vm, "\tND advertised reachable time is %d\n",
3213                            radv_info->adv_neighbor_reachable_time_in_msec);
3214           vlib_cli_output (vm,
3215                            "\tND advertised retransmit interval is %d (msec)\n",
3216                            radv_info->
3217                            adv_time_in_msec_between_retransmitted_neighbor_solicitations);
3218
3219           u32 ra_interval = radv_info->max_radv_interval;
3220           u32 ra_interval_min = radv_info->min_radv_interval;
3221           vlib_cli_output (vm,
3222                            "\tND router advertisements are sent every %d seconds (min interval is %d)\n",
3223                            ra_interval, ra_interval_min);
3224           vlib_cli_output (vm,
3225                            "\tND router advertisements live for %d seconds\n",
3226                            radv_info->adv_router_lifetime_in_sec);
3227           vlib_cli_output (vm,
3228                            "\tHosts %s stateless autoconfig for addresses\n",
3229                            (radv_info->adv_managed_flag) ? "use" :
3230                            " don't use");
3231           vlib_cli_output (vm, "\tND router advertisements sent %d\n",
3232                            radv_info->n_advertisements_sent);
3233           vlib_cli_output (vm, "\tND router solicitations received %d\n",
3234                            radv_info->n_solicitations_rcvd);
3235           vlib_cli_output (vm, "\tND router solicitations dropped %d\n",
3236                            radv_info->n_solicitations_dropped);
3237         }
3238       else
3239         {
3240           error = clib_error_return (0, "IPv6 not enabled on interface",
3241                                      format_unformat_error, input);
3242
3243         }
3244     }
3245   return error;
3246 }
3247
3248 /*?
3249  * This command is used to display various IPv6 attributes on a given
3250  * interface.
3251  *
3252  * @cliexpar
3253  * Example of how to display IPv6 settings:
3254  * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
3255  * GigabitEthernet2/0/0 is admin up
3256  *         Link-local address(es):
3257  *                 fe80::ab8/64
3258  *         Joined group address(es):
3259  *                 ff02::1
3260  *                 ff02::2
3261  *                 ff02::16
3262  *                 ff02::1:ff00:ab8
3263  *         Advertised Prefixes:
3264  *                 prefix fe80::fe:28ff:fe9c:75b3,  length 64
3265  *         MTU is 1500
3266  *         ICMP error messages are unlimited
3267  *         ICMP redirects are disabled
3268  *         ICMP unreachables are not sent
3269  *         ND DAD is disabled
3270  *         ND advertised reachable time is 0
3271  *         ND advertised retransmit interval is 0 (msec)
3272  *         ND router advertisements are sent every 200 seconds (min interval is 150)
3273  *         ND router advertisements live for 600 seconds
3274  *         Hosts use stateless autoconfig for addresses
3275  *         ND router advertisements sent 19336
3276  *         ND router solicitations received 0
3277  *         ND router solicitations dropped 0
3278  * @cliexend
3279  * Example of output if IPv6 is not enabled on the interface:
3280  * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
3281  * show ip6 interface: IPv6 not enabled on interface
3282  * @cliexend
3283 ?*/
3284 /* *INDENT-OFF* */
3285 VLIB_CLI_COMMAND (show_ip6_interface_command, static) =
3286 {
3287   .path = "show ip6 interface",
3288   .function = show_ip6_interface_cmd,
3289   .short_help = "show ip6 interface <interface>",
3290 };
3291 /* *INDENT-ON* */
3292
3293 clib_error_t *
3294 disable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
3295 {
3296   clib_error_t *error = 0;
3297   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3298   u32 ri;
3299
3300   /* look up the radv_t  information for this interface */
3301   vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3302                            ~0);
3303   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3304
3305   /* if not created - do nothing */
3306   if (ri != ~0)
3307     {
3308       vnet_main_t *vnm = vnet_get_main ();
3309       ip6_radv_t *radv_info;
3310
3311       radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3312
3313       /* check radv_info ref count for other ip6 addresses on this interface */
3314       /* This implicitly excludes the link local address */
3315       if (radv_info->ref_count == 0)
3316         {
3317           /* essentially "disables" ipv6 on this interface */
3318           error = ip6_add_del_interface_address (vm, sw_if_index,
3319                                                  &radv_info->
3320                                                  link_local_address, 128,
3321                                                  1 /* is_del */ );
3322
3323           ip6_neighbor_sw_interface_add_del (vnm, sw_if_index,
3324                                              0 /* is_add */ );
3325           ip6_mfib_interface_enable_disable (sw_if_index, 0);
3326         }
3327     }
3328   return error;
3329 }
3330
3331 int
3332 ip6_interface_enabled (vlib_main_t * vm, u32 sw_if_index)
3333 {
3334   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3335   u32 ri = ~0;
3336
3337   /* look up the radv_t  information for this interface */
3338   vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3339                            ~0);
3340
3341   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3342
3343   return ri != ~0;
3344 }
3345
3346 clib_error_t *
3347 enable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
3348 {
3349   clib_error_t *error = 0;
3350   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3351   u32 ri;
3352   int is_add = 1;
3353
3354   /* look up the radv_t  information for this interface */
3355   vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3356                            ~0);
3357
3358   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3359
3360   /* if not created yet */
3361   if (ri == ~0)
3362     {
3363       vnet_main_t *vnm = vnet_get_main ();
3364       vnet_sw_interface_t *sw_if0;
3365
3366       sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
3367       if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
3368         {
3369           ethernet_interface_t *eth_if0;
3370
3371           eth_if0 =
3372             ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
3373           if (eth_if0)
3374             {
3375               /* create radv_info. for this interface.  This holds all the info needed for router adverts */
3376               ri =
3377                 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, is_add);
3378
3379               if (ri != ~0)
3380                 {
3381                   ip6_radv_t *radv_info;
3382                   ip6_address_t link_local_address;
3383
3384                   radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3385
3386                   ip6_link_local_address_from_ethernet_mac_address
3387                     (&link_local_address, eth_if0->address);
3388
3389                   sw_if0 = vnet_get_sw_interface (vnm, sw_if_index);
3390                   if (sw_if0->type == VNET_SW_INTERFACE_TYPE_SUB)
3391                     {
3392                       /* make up  an interface id */
3393                       md5_context_t m;
3394                       u8 digest[16];
3395
3396                       link_local_address.as_u64[0] = radv_info->randomizer;
3397
3398                       md5_init (&m);
3399                       md5_add (&m, &link_local_address, 16);
3400                       md5_finish (&m, digest);
3401
3402                       clib_memcpy (&link_local_address, digest, 16);
3403
3404                       radv_info->randomizer = link_local_address.as_u64[0];
3405
3406                       link_local_address.as_u64[0] =
3407                         clib_host_to_net_u64 (0xFE80000000000000ULL);
3408                       /* clear u bit */
3409                       link_local_address.as_u8[8] &= 0xfd;
3410                     }
3411
3412                   ip6_mfib_interface_enable_disable (sw_if_index, 1);
3413
3414                   /* essentially "enables" ipv6 on this interface */
3415                   error = ip6_add_del_interface_address (vm, sw_if_index,
3416                                                          &link_local_address,
3417                                                          128
3418                                                          /* address width */ ,
3419                                                          0 /* is_del */ );
3420
3421                   if (error)
3422                     ip6_neighbor_sw_interface_add_del (vnm, sw_if_index,
3423                                                        !is_add);
3424                   else
3425                     {
3426                       radv_info->link_local_address = link_local_address;
3427                     }
3428                 }
3429             }
3430         }
3431     }
3432   return error;
3433 }
3434
3435 static clib_error_t *
3436 enable_ip6_interface_cmd (vlib_main_t * vm,
3437                           unformat_input_t * input, vlib_cli_command_t * cmd)
3438 {
3439   vnet_main_t *vnm = vnet_get_main ();
3440   clib_error_t *error = 0;
3441   u32 sw_if_index;
3442
3443   sw_if_index = ~0;
3444
3445   if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3446     {
3447       enable_ip6_interface (vm, sw_if_index);
3448     }
3449   else
3450     {
3451       error = clib_error_return (0, "unknown interface\n'",
3452                                  format_unformat_error, input);
3453
3454     }
3455   return error;
3456 }
3457
3458 /*?
3459  * This command is used to enable IPv6 on a given interface.
3460  *
3461  * @cliexpar
3462  * Example of how enable IPv6 on a given interface:
3463  * @cliexcmd{enable ip6 interface GigabitEthernet2/0/0}
3464 ?*/
3465 /* *INDENT-OFF* */
3466 VLIB_CLI_COMMAND (enable_ip6_interface_command, static) =
3467 {
3468   .path = "enable ip6 interface",
3469   .function = enable_ip6_interface_cmd,
3470   .short_help = "enable ip6 interface <interface>",
3471 };
3472 /* *INDENT-ON* */
3473
3474 static clib_error_t *
3475 disable_ip6_interface_cmd (vlib_main_t * vm,
3476                            unformat_input_t * input, vlib_cli_command_t * cmd)
3477 {
3478   vnet_main_t *vnm = vnet_get_main ();
3479   clib_error_t *error = 0;
3480   u32 sw_if_index;
3481
3482   sw_if_index = ~0;
3483
3484   if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3485     {
3486       error = disable_ip6_interface (vm, sw_if_index);
3487     }
3488   else
3489     {
3490       error = clib_error_return (0, "unknown interface\n'",
3491                                  format_unformat_error, input);
3492
3493     }
3494   return error;
3495 }
3496
3497 /*?
3498  * This command is used to disable IPv6 on a given interface.
3499  *
3500  * @cliexpar
3501  * Example of how disable IPv6 on a given interface:
3502  * @cliexcmd{disable ip6 interface GigabitEthernet2/0/0}
3503 ?*/
3504 /* *INDENT-OFF* */
3505 VLIB_CLI_COMMAND (disable_ip6_interface_command, static) =
3506 {
3507   .path = "disable ip6 interface",
3508   .function = disable_ip6_interface_cmd,
3509   .short_help = "disable ip6 interface <interface>",
3510 };
3511 /* *INDENT-ON* */
3512
3513 /*?
3514  * This command is used to configure the neighbor discovery
3515  * parameters on a given interface. Use the '<em>show ip6 interface</em>'
3516  * command to display some of the current neighbor discovery parameters
3517  * on a given interface. This command has three formats:
3518  *
3519  *
3520  * <b>Format 1 - Router Advertisement Options:</b> (Only one can be entered in a single command)
3521  *
3522  * '<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>'
3523  *
3524  * Where:
3525  *
3526  * <em>[no] ra-managed-config-flag</em> - Advertises in ICMPv6
3527  * router-advertisement messages to use stateful address
3528  * auto-configuration to obtain address information (sets the M-bit).
3529  * Default is the M-bit is not set and the '<em>no</em>' option
3530  * returns it to this default state.
3531  *
3532  * <em>[no] ra-other-config-flag</em> - Indicates in ICMPv6
3533  * router-advertisement messages that hosts use stateful auto
3534  * configuration to obtain nonaddress related information (sets
3535  * the O-bit). Default is the O-bit is not set and the '<em>no</em>'
3536  * option returns it to this default state.
3537  *
3538  * <em>[no] ra-suppress</em> - Disables sending ICMPv6 router-advertisement
3539  * messages. The '<em>no</em>' option implies to enable sending ICMPv6
3540  * router-advertisement messages.
3541  *
3542  * <em>[no] ra-suppress-link-layer</em> - Indicates not to include the
3543  * optional source link-layer address in the ICMPv6 router-advertisement
3544  * messages. Default is to include the optional source link-layer address
3545  * and the '<em>no</em>' option returns it to this default state.
3546  *
3547  * <em>[no] ra-send-unicast</em> - Use the source address of the
3548  * router-solicitation message if availiable. The default is to use
3549  * multicast address of all nodes, and the '<em>no</em>' option returns
3550  * it to this default state.
3551  *
3552  * <em>[no] ra-lifetime <lifetime></em> - Advertises the lifetime of a
3553  * default router in ICMPv6 router-advertisement messages. The range is
3554  * from 0 to 9000 seconds. '<em><lifetime></em>' must be greater than
3555  * '<em><max-interval></em>'. The default value is 600 seconds and the
3556  * '<em>no</em>' option returns it to this default value.
3557  *
3558  * <em>[no] ra-initial <cnt> <interval></em> - Number of initial ICMPv6
3559  * router-advertisement messages sent and the interval between each
3560  * message. Range for count is 1 - 3 and default is 3. Range for interval
3561  * is 1 to 16 seconds, and default is 16 seconds. The '<em>no</em>' option
3562  * returns both to their default value.
3563  *
3564  * <em>[no] ra-interval <max-interval> [<min-interval>]</em> - Configures the
3565  * interval between sending ICMPv6 router-advertisement messages. The
3566  * range for max-interval is from 4 to 200 seconds. min-interval can not
3567  * be more than 75% of max-interval. If not set, min-interval will be
3568  * set to 75% of max-interval. The range for min-interval is from 3 to
3569  * 150 seconds.  The '<em>no</em>' option returns both to their default
3570  * value.
3571  *
3572  * <em>[no] ra-cease</em> - Cease sending ICMPv6 router-advertisement messages.
3573  * The '<em>no</em>' options implies to start (or restart) sending
3574  * ICMPv6 router-advertisement messages.
3575  *
3576  *
3577  * <b>Format 2 - Prefix Options:</b>
3578  *
3579  * '<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>'
3580  *
3581  * Where:
3582  *
3583  * <em>no</em> - All additional flags are ignored and the prefix is deleted.
3584  *
3585  * <em><valid-lifetime> <pref-lifetime></em> - '<em><valid-lifetime></em>' is the
3586  * length of time in seconds during what the prefix is valid for the purpose of
3587  * on-link determination. Range is 7203 to 2592000 seconds and default is 2592000
3588  * seconds (30 days). '<em><pref-lifetime></em>' is the prefered-lifetime and is the
3589  * length of time in seconds during what addresses generated from the prefix remain
3590  * preferred. Range is 0 to 604800 seconds and default is 604800 seconds (7 days).
3591  *
3592  * <em>infinite</em> - Both '<em><valid-lifetime></em>' and '<em><<pref-lifetime></em>'
3593  * are inifinte, no timeout.
3594  *
3595  * <em>no-advertise</em> - Do not send full router address in prefix
3596  * advertisement. Default is to advertise (i.e. - This flag is off by default).
3597  *
3598  * <em>off-link</em> - Prefix is off-link, clear L-bit in packet. Default is on-link
3599  * (i.e. - This flag is off and L-bit in packet is set by default and this prefix can
3600  * be used for on-link determination). '<em>no-onlink</em>' also controls the L-bit.
3601  *
3602  * <em>no-autoconfig</em> - Do not use prefix for autoconfiguration, clear A-bit in packet.
3603  * Default is autoconfig (i.e. - This flag is off and A-bit in packet is set by default.
3604  *
3605  * <em>no-onlink</em> - Do not use prefix for onlink determination, clear L-bit in packet.
3606  * Default is on-link (i.e. - This flag is off and L-bit in packet is set by default and
3607  * this prefix can be used for on-link determination). '<em>off-link</em>' also controls
3608  * the L-bit.
3609  *
3610  *
3611  * <b>Format 3: - Default of Prefix:</b>
3612  *
3613  * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> default</b></em>'
3614  *
3615  * When a new prefix is added (or existing one is being overwritten) <em>default</em>
3616  * uses default values for the prefix. If <em>no</em> is used, the <em>default</em>
3617  * is ignored and the prefix is deleted.
3618  *
3619  *
3620  * @cliexpar
3621  * Example of how set a router advertisement option:
3622  * @cliexcmd{ip6 nd GigabitEthernet2/0/0 ra-interval 100 20}
3623  * Example of how to add a prefix:
3624  * @cliexcmd{ip6 nd GigabitEthernet2/0/0 prefix fe80::fe:28ff:fe9c:75b3/64 infinite no-advertise}
3625  * Example of how to delete a prefix:
3626  * @cliexcmd{ip6 nd GigabitEthernet2/0/0 no prefix fe80::fe:28ff:fe9c:75b3/64}
3627 ?*/
3628 /* *INDENT-OFF* */
3629 VLIB_CLI_COMMAND (ip6_nd_command, static) =
3630 {
3631   .path = "ip6 nd",
3632   .short_help = "ip6 nd <interface> ...",
3633   .function = ip6_neighbor_cmd,
3634 };
3635 /* *INDENT-ON* */
3636
3637 clib_error_t *
3638 set_ip6_link_local_address (vlib_main_t * vm,
3639                             u32 sw_if_index, ip6_address_t * address)
3640 {
3641   clib_error_t *error = 0;
3642   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3643   u32 ri;
3644   ip6_radv_t *radv_info;
3645   vnet_main_t *vnm = vnet_get_main ();
3646
3647   if (!ip6_address_is_link_local_unicast (address))
3648     {
3649       vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_LINK_LOCAL;
3650       return (error = clib_error_return (0, "address not link-local",
3651                                          format_unformat_error));
3652     }
3653
3654   /* call enable ipv6  */
3655   enable_ip6_interface (vm, sw_if_index);
3656
3657   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3658
3659   if (ri != ~0)
3660     {
3661       radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3662
3663       /* save if link local address (overwrite default) */
3664
3665       /* delete the old one */
3666       error = ip6_add_del_interface_address (vm, sw_if_index,
3667                                              &radv_info->link_local_address,
3668                                              128, 1 /* is_del */ );
3669
3670       if (!error)
3671         {
3672           /* add the new one */
3673           error = ip6_add_del_interface_address (vm, sw_if_index,
3674                                                  address, 128,
3675                                                  0 /* is_del */ );
3676
3677           if (!error)
3678             {
3679               radv_info->link_local_address = *address;
3680             }
3681         }
3682     }
3683   else
3684     {
3685       vnm->api_errno = VNET_API_ERROR_IP6_NOT_ENABLED;
3686       error = clib_error_return (0, "ip6 not enabled for interface",
3687                                  format_unformat_error);
3688     }
3689   return error;
3690 }
3691
3692 clib_error_t *
3693 set_ip6_link_local_address_cmd (vlib_main_t * vm,
3694                                 unformat_input_t * input,
3695                                 vlib_cli_command_t * cmd)
3696 {
3697   vnet_main_t *vnm = vnet_get_main ();
3698   clib_error_t *error = 0;
3699   u32 sw_if_index;
3700   ip6_address_t ip6_addr;
3701
3702   if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3703     {
3704       /* get the rest of the command */
3705       while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3706         {
3707           if (unformat (input, "%U", unformat_ip6_address, &ip6_addr))
3708             break;
3709           else
3710             return (unformat_parse_error (input));
3711         }
3712     }
3713   error = set_ip6_link_local_address (vm, sw_if_index, &ip6_addr);
3714   return error;
3715 }
3716
3717 /*?
3718  * This command is used to assign an IPv6 Link-local address to an
3719  * interface. This command will enable IPv6 on an interface if it
3720  * is not already enabled. Use the '<em>show ip6 interface</em>' command
3721  * to display the assigned Link-local address.
3722  *
3723  * @cliexpar
3724  * Example of how to assign an IPv6 Link-local address to an interface:
3725  * @cliexcmd{set ip6 link-local address GigabitEthernet2/0/0 FE80::AB8}
3726 ?*/
3727 /* *INDENT-OFF* */
3728 VLIB_CLI_COMMAND (set_ip6_link_local_address_command, static) =
3729 {
3730   .path = "set ip6 link-local address",
3731   .short_help = "set ip6 link-local address <interface> <ip6-address>",
3732   .function = set_ip6_link_local_address_cmd,
3733 };
3734 /* *INDENT-ON* */
3735
3736 /**
3737  * @brief callback when an interface address is added or deleted
3738  */
3739 static void
3740 ip6_neighbor_add_del_interface_address (ip6_main_t * im,
3741                                         uword opaque,
3742                                         u32 sw_if_index,
3743                                         ip6_address_t * address,
3744                                         u32 address_length,
3745                                         u32 if_address_index, u32 is_delete)
3746 {
3747   vnet_main_t *vnm = vnet_get_main ();
3748   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3749   u32 ri;
3750   vlib_main_t *vm = vnm->vlib_main;
3751   ip6_radv_t *radv_info;
3752   ip6_address_t a;
3753
3754   /* create solicited node multicast address for this interface adddress */
3755   ip6_set_solicited_node_multicast_address (&a, 0);
3756
3757   a.as_u8[0xd] = address->as_u8[0xd];
3758   a.as_u8[0xe] = address->as_u8[0xe];
3759   a.as_u8[0xf] = address->as_u8[0xf];
3760
3761   if (!is_delete)
3762     {
3763       /* try to  create radv_info - does nothing if ipv6 already enabled */
3764       enable_ip6_interface (vm, sw_if_index);
3765
3766       /* look up the radv_t  information for this interface */
3767       vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3768                                sw_if_index, ~0);
3769       ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3770       if (ri != ~0)
3771         {
3772           /* get radv_info */
3773           radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3774
3775           /* add address */
3776           if (!ip6_address_is_link_local_unicast (address))
3777             radv_info->ref_count++;
3778
3779           ip6_neighbor_add_mld_prefix (radv_info, &a);
3780         }
3781     }
3782   else
3783     {
3784
3785       /* delete */
3786       /* look up the radv_t  information for this interface */
3787       vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3788                                sw_if_index, ~0);
3789       ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3790
3791       if (ri != ~0)
3792         {
3793           /* get radv_info */
3794           radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3795
3796           ip6_neighbor_del_mld_prefix (radv_info, &a);
3797
3798           /* if interface up send MLDP "report" */
3799           radv_info->all_routers_mcast = 0;
3800
3801           /* add address */
3802           if (!ip6_address_is_link_local_unicast (address))
3803             radv_info->ref_count--;
3804         }
3805       /* Ensure that IPv6 is disabled, and LL removed after ref_count reaches 0 */
3806       disable_ip6_interface (vm, sw_if_index);
3807     }
3808 }
3809
3810 clib_error_t *
3811 ip6_set_neighbor_limit (u32 neighbor_limit)
3812 {
3813   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3814
3815   nm->limit_neighbor_cache_size = neighbor_limit;
3816   return 0;
3817 }
3818
3819 static clib_error_t *
3820 ip6_neighbor_init (vlib_main_t * vm)
3821 {
3822   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3823   ip6_main_t *im = &ip6_main;
3824
3825   mhash_init (&nm->neighbor_index_by_key,
3826               /* value size */ sizeof (uword),
3827               /* key size */ sizeof (ip6_neighbor_key_t));
3828
3829   icmp6_register_type (vm, ICMP6_neighbor_solicitation,
3830                        ip6_icmp_neighbor_solicitation_node.index);
3831   icmp6_register_type (vm, ICMP6_neighbor_advertisement,
3832                        ip6_icmp_neighbor_advertisement_node.index);
3833   icmp6_register_type (vm, ICMP6_router_solicitation,
3834                        ip6_icmp_router_solicitation_node.index);
3835   icmp6_register_type (vm, ICMP6_router_advertisement,
3836                        ip6_icmp_router_advertisement_node.index);
3837
3838   /* handler node for ip6 neighbor discovery events and timers */
3839   vlib_register_node (vm, &ip6_icmp_neighbor_discovery_event_node);
3840
3841   /* add call backs */
3842   ip6_add_del_interface_address_callback_t cb;
3843   memset (&cb, 0x0, sizeof (ip6_add_del_interface_address_callback_t));
3844
3845   /* when an interface address changes... */
3846   cb.function = ip6_neighbor_add_del_interface_address;
3847   cb.function_opaque = 0;
3848   vec_add1 (im->add_del_interface_address_callbacks, cb);
3849
3850   mhash_init (&nm->pending_resolutions_by_address,
3851               /* value size */ sizeof (uword),
3852               /* key size */ sizeof (ip6_address_t));
3853
3854   mhash_init (&nm->mac_changes_by_address,
3855               /* value size */ sizeof (uword),
3856               /* key size */ sizeof (ip6_address_t));
3857
3858   /* default, configurable */
3859   nm->limit_neighbor_cache_size = 50000;
3860
3861 #if 0
3862   /* $$$$ Hack fix for today */
3863   vec_validate_init_empty
3864     (im->discover_neighbor_next_index_by_hw_if_index, 32, 0 /* drop */ );
3865 #endif
3866
3867   return 0;
3868 }
3869
3870 VLIB_INIT_FUNCTION (ip6_neighbor_init);
3871
3872
3873 void
3874 vnet_register_ip6_neighbor_resolution_event (vnet_main_t * vnm,
3875                                              void *address_arg,
3876                                              uword node_index,
3877                                              uword type_opaque, uword data)
3878 {
3879   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3880   ip6_address_t *address = address_arg;
3881   uword *p;
3882   pending_resolution_t *pr;
3883
3884   pool_get (nm->pending_resolutions, pr);
3885
3886   pr->next_index = ~0;
3887   pr->node_index = node_index;
3888   pr->type_opaque = type_opaque;
3889   pr->data = data;
3890
3891   p = mhash_get (&nm->pending_resolutions_by_address, address);
3892   if (p)
3893     {
3894       /* Insert new resolution at the head of the list */
3895       pr->next_index = p[0];
3896       mhash_unset (&nm->pending_resolutions_by_address, address, 0);
3897     }
3898
3899   mhash_set (&nm->pending_resolutions_by_address, address,
3900              pr - nm->pending_resolutions, 0 /* old value */ );
3901 }
3902
3903 int
3904 vnet_add_del_ip6_nd_change_event (vnet_main_t * vnm,
3905                                   void *data_callback,
3906                                   u32 pid,
3907                                   void *address_arg,
3908                                   uword node_index,
3909                                   uword type_opaque, uword data, int is_add)
3910 {
3911   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3912   ip6_address_t *address = address_arg;
3913   uword *p;
3914   pending_resolution_t *mc;
3915   void (*fp) (u32, u8 *) = data_callback;
3916
3917   if (is_add)
3918     {
3919       pool_get (nm->mac_changes, mc);
3920
3921       mc->next_index = ~0;
3922       mc->node_index = node_index;
3923       mc->type_opaque = type_opaque;
3924       mc->data = data;
3925       mc->data_callback = data_callback;
3926       mc->pid = pid;
3927
3928       p = mhash_get (&nm->mac_changes_by_address, address);
3929       if (p)
3930         {
3931           /* Insert new resolution at the head of the list */
3932           mc->next_index = p[0];
3933           mhash_unset (&nm->mac_changes_by_address, address, 0);
3934         }
3935
3936       mhash_set (&nm->mac_changes_by_address, address,
3937                  mc - nm->mac_changes, 0);
3938       return 0;
3939     }
3940   else
3941     {
3942       u32 index;
3943       pending_resolution_t *mc_last = 0;
3944
3945       p = mhash_get (&nm->mac_changes_by_address, address);
3946       if (p == 0)
3947         return VNET_API_ERROR_NO_SUCH_ENTRY;
3948
3949       index = p[0];
3950
3951       while (index != (u32) ~ 0)
3952         {
3953           mc = pool_elt_at_index (nm->mac_changes, index);
3954           if (mc->node_index == node_index &&
3955               mc->type_opaque == type_opaque && mc->pid == pid)
3956             {
3957               /* Clients may need to clean up pool entries, too */
3958               if (fp)
3959                 (*fp) (mc->data, 0 /* no new mac addrs */ );
3960               if (index == p[0])
3961                 {
3962                   mhash_unset (&nm->mac_changes_by_address, address, 0);
3963                   if (mc->next_index != ~0)
3964                     mhash_set (&nm->mac_changes_by_address, address,
3965                                mc->next_index, 0);
3966                   pool_put (nm->mac_changes, mc);
3967                   return 0;
3968                 }
3969               else
3970                 {
3971                   ASSERT (mc_last);
3972                   mc_last->next_index = mc->next_index;
3973                   pool_put (nm->mac_changes, mc);
3974                   return 0;
3975                 }
3976             }
3977           mc_last = mc;
3978           index = mc->next_index;
3979         }
3980
3981       return VNET_API_ERROR_NO_SUCH_ENTRY;
3982     }
3983 }
3984
3985 int
3986 vnet_ip6_nd_term (vlib_main_t * vm,
3987                   vlib_node_runtime_t * node,
3988                   vlib_buffer_t * p0,
3989                   ethernet_header_t * eth,
3990                   ip6_header_t * ip, u32 sw_if_index, u16 bd_index)
3991 {
3992   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3993   icmp6_neighbor_solicitation_or_advertisement_header_t *ndh;
3994   pending_resolution_t *mc;
3995
3996   ndh = ip6_next_header (ip);
3997   if (ndh->icmp.type != ICMP6_neighbor_solicitation &&
3998       ndh->icmp.type != ICMP6_neighbor_advertisement)
3999     return 0;
4000
4001   if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
4002                      (p0->flags & VLIB_BUFFER_IS_TRACED)))
4003     {
4004       u8 *t0 = vlib_add_trace (vm, node, p0,
4005                                sizeof (icmp6_input_trace_t));
4006       clib_memcpy (t0, ip, sizeof (icmp6_input_trace_t));
4007     }
4008
4009   /* Check if anyone want ND events for L2 BDs */
4010   uword *p = mhash_get (&nm->mac_changes_by_address, &ip6a_zero);
4011   if (p && !ip6_address_is_link_local_unicast (&ip->src_address))
4012     {
4013       u32 next_index = p[0];
4014       while (next_index != (u32) ~ 0)
4015         {
4016           int (*fp) (u32, u8 *, u32, ip6_address_t *);
4017           int rv = 1;
4018           mc = pool_elt_at_index (nm->mac_changes, next_index);
4019           fp = mc->data_callback;
4020           /* Call the callback, return 1 to suppress dup events */
4021           if (fp)
4022             rv = (*fp) (mc->data,
4023                         eth->src_address, sw_if_index, &ip->src_address);
4024           /* Signal the resolver process */
4025           if (rv == 0)
4026             vlib_process_signal_event (vm, mc->node_index,
4027                                        mc->type_opaque, mc->data);
4028           next_index = mc->next_index;
4029         }
4030     }
4031
4032   /* Check if MAC entry exsist for solicited target IP */
4033   if (ndh->icmp.type == ICMP6_neighbor_solicitation)
4034     {
4035       icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *opt;
4036       l2_bridge_domain_t *bd_config;
4037       u8 *macp;
4038
4039       opt = (void *) (ndh + 1);
4040       if ((opt->header.type !=
4041            ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address) ||
4042           (opt->header.n_data_u64s != 1))
4043         return 0;               /* source link layer address option not present */
4044
4045       bd_config = vec_elt_at_index (l2input_main.bd_configs, bd_index);
4046       macp =
4047         (u8 *) hash_get_mem (bd_config->mac_by_ip6, &ndh->target_address);
4048       if (macp)
4049         {                       /* found ip-mac entry, generate eighbor advertisement response */
4050           int bogus_length;
4051           vlib_node_runtime_t *error_node =
4052             vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
4053           ip->dst_address = ip->src_address;
4054           ip->src_address = ndh->target_address;
4055           ip->hop_limit = 255;
4056           opt->header.type =
4057             ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
4058           clib_memcpy (opt->ethernet_address, macp, 6);
4059           ndh->icmp.type = ICMP6_neighbor_advertisement;
4060           ndh->advertisement_flags = clib_host_to_net_u32
4061             (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED |
4062              ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
4063           ndh->icmp.checksum = 0;
4064           ndh->icmp.checksum =
4065             ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip, &bogus_length);
4066           clib_memcpy (eth->dst_address, eth->src_address, 6);
4067           clib_memcpy (eth->src_address, macp, 6);
4068           vlib_error_count (vm, error_node->node_index,
4069                             ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX, 1);
4070           return 1;
4071         }
4072     }
4073
4074   return 0;
4075
4076 }
4077
4078 int
4079 ip6_neighbor_proxy_add_del (u32 sw_if_index, ip6_address_t * addr, u8 is_del)
4080 {
4081   u32 fib_index;
4082
4083   fib_prefix_t pfx = {
4084     .fp_len = 128,
4085     .fp_proto = FIB_PROTOCOL_IP6,
4086     .fp_addr = {
4087                 .ip6 = *addr,
4088                 },
4089   };
4090   ip46_address_t nh = {
4091     .ip6 = *addr,
4092   };
4093
4094   fib_index = ip6_fib_table_get_index_for_sw_if_index (sw_if_index);
4095
4096   if (~0 == fib_index)
4097     return VNET_API_ERROR_NO_SUCH_FIB;
4098
4099   if (is_del)
4100     {
4101       fib_table_entry_path_remove (fib_index,
4102                                    &pfx,
4103                                    FIB_SOURCE_IP6_ND_PROXY,
4104                                    FIB_PROTOCOL_IP6,
4105                                    &nh,
4106                                    sw_if_index,
4107                                    ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
4108       /* flush the ND cache of this address if it's there */
4109       vnet_unset_ip6_ethernet_neighbor (vlib_get_main (),
4110                                         sw_if_index, addr, NULL, 0);
4111     }
4112   else
4113     {
4114       fib_table_entry_path_add (fib_index,
4115                                 &pfx,
4116                                 FIB_SOURCE_IP6_ND_PROXY,
4117                                 FIB_ENTRY_FLAG_NONE,
4118                                 FIB_PROTOCOL_IP6,
4119                                 &nh,
4120                                 sw_if_index,
4121                                 ~0, 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
4122     }
4123   return (0);
4124 }
4125
4126 static clib_error_t *
4127 set_ip6_nd_proxy_cmd (vlib_main_t * vm,
4128                       unformat_input_t * input, vlib_cli_command_t * cmd)
4129 {
4130   vnet_main_t *vnm = vnet_get_main ();
4131   clib_error_t *error = 0;
4132   ip6_address_t addr;
4133   u32 sw_if_index;
4134   u8 is_del = 0;
4135
4136   if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4137     {
4138       /* get the rest of the command */
4139       while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
4140         {
4141           if (unformat (input, "%U", unformat_ip6_address, &addr))
4142             break;
4143           else if (unformat (input, "delete") || unformat (input, "del"))
4144             is_del = 1;
4145           else
4146             return (unformat_parse_error (input));
4147         }
4148     }
4149
4150   ip6_neighbor_proxy_add_del (sw_if_index, &addr, is_del);
4151
4152   return error;
4153 }
4154
4155 /* *INDENT-OFF* */
4156 VLIB_CLI_COMMAND (set_ip6_nd_proxy_command, static) =
4157 {
4158   .path = "set ip6 nd proxy",
4159   .short_help = "set ip6 nd proxy <HOST> <INTERFACE>",
4160   .function = set_ip6_nd_proxy_cmd,
4161 };
4162 /* *INDENT-ON* */
4163
4164 void
4165 ethernet_ndp_change_mac (u32 sw_if_index)
4166 {
4167   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4168   ip6_neighbor_t *n;
4169
4170   /* *INDENT-OFF* */
4171   pool_foreach (n, nm->neighbor_pool,
4172   ({
4173     if (n->key.sw_if_index == sw_if_index)
4174       {
4175         adj_nbr_walk_nh6 (sw_if_index,
4176                           &n->key.ip6_address,
4177                           ip6_nd_mk_complete_walk, n);
4178       }
4179   }));
4180   /* *INDENT-ON* */
4181 }
4182
4183 /*
4184  * fd.io coding-style-patch-verification: ON
4185  *
4186  * Local Variables:
4187  * eval: (c-set-style "gnu")
4188  * End:
4189  */