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   /* Wildcard nd report publisher */
 199   uword wc_ip6_nd_publisher_node;
 200   uword wc_ip6_nd_publisher_et;
 201 } ip6_neighbor_main_t;
 202
 203 /* ipv6 neighbor discovery - timer/event types */
 204 typedef enum
 205 {
 206   ICMP6_ND_EVENT_INIT,
 207 } ip6_icmp_neighbor_discovery_event_type_t;
 208
 209 typedef union
 210 {
 211   u32 add_del_swindex;
 212   struct
 213   {
 214     u32 up_down_swindex;
 215     u32 fib_index;
 216   } up_down_event;
 217 } ip6_icmp_neighbor_discovery_event_data_t;
 218
 219 static ip6_neighbor_main_t ip6_neighbor_main;
 220 static ip6_address_t ip6a_zero; /* ip6 address 0 */
 221
 222 static void wc_nd_signal_report (wc_nd_report_t * r);
 223
 224 /**
 225  * @brief publish wildcard arp event
 226  * @param sw_if_index The interface on which the ARP entires are acted
 227  */
 228 static int
 229 vnet_nd_wc_publish (u32 sw_if_index, u8 * mac, ip6_address_t * ip6)
 230 {
 231   wc_nd_report_t r = {
 232     .sw_if_index = sw_if_index,
 233     .ip6 = *ip6,
 234   };
 235   memcpy (r.mac, mac, sizeof r.mac);
 236
 237   void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
 238   vl_api_rpc_call_main_thread (wc_nd_signal_report, (u8 *) & r, sizeof r);
 239   return 0;
 240 }
 241
 242 static void
 243 wc_nd_signal_report (wc_nd_report_t * r)
 244 {
 245   vlib_main_t *vm = vlib_get_main ();
 246   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
 247   uword ni = nm->wc_ip6_nd_publisher_node;
 248   uword et = nm->wc_ip6_nd_publisher_et;
 249
 250   if (ni == (uword) ~ 0)
 251     return;
 252   wc_nd_report_t *q =
 253     vlib_process_signal_event_data (vm, ni, et, 1, sizeof *q);
 254
 255   *q = *r;
 256 }
 257
 258 void
 259 wc_nd_set_publisher_node (uword node_index, uword event_type)
 260 {
 261   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
 262   nm->wc_ip6_nd_publisher_node = node_index;
 263   nm->wc_ip6_nd_publisher_et = event_type;
 264 }
 265
 266 static u8 *
 267 format_ip6_neighbor_ip6_entry (u8 * s, va_list * va)
 268 {
 269   vlib_main_t *vm = va_arg (*va, vlib_main_t *);
 270   ip6_neighbor_t *n = va_arg (*va, ip6_neighbor_t *);
 271   vnet_main_t *vnm = vnet_get_main ();
 272   vnet_sw_interface_t *si;
 273   u8 *flags = 0;
 274
 275   if (!n)
 276     return format (s, "%=12s%=20s%=6s%=20s%=40s", "Time", "Address", "Flags",
 277                    "Link layer", "Interface");
 278
 279   if (n->flags & IP6_NEIGHBOR_FLAG_DYNAMIC)
 280     flags = format (flags, "D");
 281
 282   if (n->flags & IP6_NEIGHBOR_FLAG_STATIC)
 283     flags = format (flags, "S");
 284
 285   if (n->flags & IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY)
 286     flags = format (flags, "N");
 287
 288   si = vnet_get_sw_interface (vnm, n->key.sw_if_index);
 289   s = format (s, "%=12U%=20U%=6s%=20U%=40U",
 290               format_vlib_cpu_time, vm, n->cpu_time_last_updated,
 291               format_ip6_address, &n->key.ip6_address,
 292               flags ? (char *) flags : "",
 293               format_ethernet_address, n->link_layer_address,
 294               format_vnet_sw_interface_name, vnm, si);
 295
 296   vec_free (flags);
 297   return s;
 298 }
 299
 300 static void
 301 ip6_neighbor_adj_fib_remove (ip6_neighbor_t * n, u32 fib_index)
 302 {
 303   if (FIB_NODE_INDEX_INVALID != n->fib_entry_index)
 304     {
 305       fib_prefix_t pfx = {
 306         .fp_len = 128,
 307         .fp_proto = FIB_PROTOCOL_IP6,
 308         .fp_addr.ip6 = n->key.ip6_address,
 309       };
 310       fib_table_entry_path_remove (fib_index,
 311                                    &pfx,
 312                                    FIB_SOURCE_ADJ,
 313                                    DPO_PROTO_IP6,
 314                                    &pfx.fp_addr,
 315                                    n->key.sw_if_index, ~0,
 316                                    1, FIB_ROUTE_PATH_FLAG_NONE);
 317     }
 318 }
 319
 320 static clib_error_t *
 321 ip6_neighbor_sw_interface_up_down (vnet_main_t * vnm,
 322                                    u32 sw_if_index, u32 flags)
 323 {
 324   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
 325   ip6_neighbor_t *n;
 326
 327   if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
 328     {
 329       u32 i, *to_delete = 0;
 330
 331       /* *INDENT-OFF* */
 332       pool_foreach (n, nm->neighbor_pool,
 333       ({
 334         if (n->key.sw_if_index == sw_if_index)
 335           vec_add1 (to_delete, n - nm->neighbor_pool);
 336       }));
 337       /* *INDENT-ON* */
 338
 339       for (i = 0; i < vec_len (to_delete); i++)
 340         {
 341           n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
 342           mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
 343           ip6_neighbor_adj_fib_remove (n,
 344                                        ip6_fib_table_get_index_for_sw_if_index
 345                                        (n->key.sw_if_index));
 346           pool_put (nm->neighbor_pool, n);
 347         }
 348       vec_free (to_delete);
 349     }
 350
 351   return 0;
 352 }
 353
 354 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_neighbor_sw_interface_up_down);
 355
 356 static void
 357 unset_random_neighbor_entry (void)
 358 {
 359   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
 360   vnet_main_t *vnm = vnet_get_main ();
 361   vlib_main_t *vm = vnm->vlib_main;
 362   ip6_neighbor_t *e;
 363   u32 index;
 364
 365   index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
 366   nm->neighbor_delete_rotor = index;
 367
 368   /* Try again from elt 0, could happen if an intfc goes down */
 369   if (index == ~0)
 370     {
 371       index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
 372       nm->neighbor_delete_rotor = index;
 373     }
 374
 375   /* Nothing left in the pool */
 376   if (index == ~0)
 377     return;
 378
 379   e = pool_elt_at_index (nm->neighbor_pool, index);
 380
 381   vnet_unset_ip6_ethernet_neighbor (vm, e->key.sw_if_index,
 382                                     &e->key.ip6_address,
 383                                     e->link_layer_address,
 384                                     ETHER_MAC_ADDR_LEN);
 385 }
 386
 387 typedef struct
 388 {
 389   u8 is_add;
 390   u8 is_static;
 391   u8 is_no_fib_entry;
 392   u8 link_layer_address[6];
 393   u32 sw_if_index;
 394   ip6_address_t addr;
 395 } ip6_neighbor_set_unset_rpc_args_t;
 396
 397 static void ip6_neighbor_set_unset_rpc_callback
 398   (ip6_neighbor_set_unset_rpc_args_t * a);
 399
 400 static void set_unset_ip6_neighbor_rpc
 401   (vlib_main_t * vm,
 402    u32 sw_if_index,
 403    ip6_address_t * a, u8 * link_layer_address, int is_add, int is_static,
 404    int is_no_fib_entry)
 405 {
 406   ip6_neighbor_set_unset_rpc_args_t args;
 407   void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
 408
 409   args.sw_if_index = sw_if_index;
 410   args.is_add = is_add;
 411   args.is_static = is_static;
 412   args.is_no_fib_entry = is_no_fib_entry;
 413   clib_memcpy (&args.addr, a, sizeof (*a));
 414   if (NULL != link_layer_address)
 415     clib_memcpy (args.link_layer_address, link_layer_address, 6);
 416
 417   vl_api_rpc_call_main_thread (ip6_neighbor_set_unset_rpc_callback,
 418                                (u8 *) & args, sizeof (args));
 419 }
 420
 421 static void
 422 ip6_nbr_probe (ip_adjacency_t * adj)
 423 {
 424   icmp6_neighbor_solicitation_header_t *h;
 425   vnet_main_t *vnm = vnet_get_main ();
 426   ip6_main_t *im = &ip6_main;
 427   ip_interface_address_t *ia;
 428   ip6_address_t *dst, *src;
 429   vnet_hw_interface_t *hi;
 430   vnet_sw_interface_t *si;
 431   vlib_buffer_t *b;
 432   int bogus_length;
 433   vlib_main_t *vm;
 434   u32 bi = 0;
 435
 436   vm = vlib_get_main ();
 437
 438   si = vnet_get_sw_interface (vnm, adj->rewrite_header.sw_if_index);
 439   dst = &adj->sub_type.nbr.next_hop.ip6;
 440
 441   if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
 442     {
 443       return;
 444     }
 445   src = ip6_interface_address_matching_destination (im, dst,
 446                                                     adj->rewrite_header.
 447                                                     sw_if_index, &ia);
 448   if (!src)
 449     {
 450       return;
 451     }
 452
 453   h = vlib_packet_template_get_packet (vm,
 454                                        &im->discover_neighbor_packet_template,
 455                                        &bi);
 456
 457   hi = vnet_get_sup_hw_interface (vnm, adj->rewrite_header.sw_if_index);
 458
 459   h->ip.dst_address.as_u8[13] = dst->as_u8[13];
 460   h->ip.dst_address.as_u8[14] = dst->as_u8[14];
 461   h->ip.dst_address.as_u8[15] = dst->as_u8[15];
 462   h->ip.src_address = src[0];
 463   h->neighbor.target_address = dst[0];
 464
 465   clib_memcpy (h->link_layer_option.ethernet_address,
 466                hi->hw_address, vec_len (hi->hw_address));
 467
 468   h->neighbor.icmp.checksum =
 469     ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
 470   ASSERT (bogus_length == 0);
 471
 472   b = vlib_get_buffer (vm, bi);
 473   vnet_buffer (b)->sw_if_index[VLIB_RX] =
 474     vnet_buffer (b)->sw_if_index[VLIB_TX] = adj->rewrite_header.sw_if_index;
 475
 476   /* Add encapsulation string for software interface (e.g. ethernet header). */
 477   vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
 478   vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
 479
 480   {
 481     vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
 482     u32 *to_next = vlib_frame_vector_args (f);
 483     to_next[0] = bi;
 484     f->n_vectors = 1;
 485     vlib_put_frame_to_node (vm, hi->output_node_index, f);
 486   }
 487 }
 488
 489 static void
 490 ip6_nd_mk_complete (adj_index_t ai, ip6_neighbor_t * nbr)
 491 {
 492   adj_nbr_update_rewrite (ai, ADJ_NBR_REWRITE_FLAG_COMPLETE,
 493                           ethernet_build_rewrite (vnet_get_main (),
 494                                                   nbr->key.sw_if_index,
 495                                                   adj_get_link_type (ai),
 496                                                   nbr->link_layer_address));
 497 }
 498
 499 static void
 500 ip6_nd_mk_incomplete (adj_index_t ai)
 501 {
 502   ip_adjacency_t *adj = adj_get (ai);
 503
 504   adj_nbr_update_rewrite (ai,
 505                           ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
 506                           ethernet_build_rewrite (vnet_get_main (),
 507                                                   adj->rewrite_header.
 508                                                   sw_if_index,
 509                                                   adj_get_link_type (ai),
 510                                                   VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
 511 }
 512
 513 #define IP6_NBR_MK_KEY(k, sw_if_index, addr) \
 514 {                                            \
 515     k.sw_if_index = sw_if_index;             \
 516     k.ip6_address = *addr;                   \
 517     k.pad = 0;                               \
 518 }
 519
 520 static ip6_neighbor_t *
 521 ip6_nd_find (u32 sw_if_index, const ip6_address_t * addr)
 522 {
 523   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
 524   ip6_neighbor_t *n = NULL;
 525   ip6_neighbor_key_t k;
 526   uword *p;
 527
 528   IP6_NBR_MK_KEY (k, sw_if_index, addr);
 529
 530   p = mhash_get (&nm->neighbor_index_by_key, &k);
 531   if (p)
 532     {
 533       n = pool_elt_at_index (nm->neighbor_pool, p[0]);
 534     }
 535
 536   return (n);
 537 }
 538
 539 static adj_walk_rc_t
 540 ip6_nd_mk_complete_walk (adj_index_t ai, void *ctx)
 541 {
 542   ip6_neighbor_t *nbr = ctx;
 543
 544   ip6_nd_mk_complete (ai, nbr);
 545
 546   return (ADJ_WALK_RC_CONTINUE);
 547 }
 548
 549 static adj_walk_rc_t
 550 ip6_nd_mk_incomplete_walk (adj_index_t ai, void *ctx)
 551 {
 552   ip6_nd_mk_incomplete (ai);
 553
 554   return (ADJ_WALK_RC_CONTINUE);
 555 }
 556
 557 void
 558 ip6_ethernet_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
 559 {
 560   ip6_neighbor_t *nbr;
 561   ip_adjacency_t *adj;
 562
 563   adj = adj_get (ai);
 564
 565   nbr = ip6_nd_find (sw_if_index, &adj->sub_type.nbr.next_hop.ip6);
 566
 567   switch (adj->lookup_next_index)
 568     {
 569     case IP_LOOKUP_NEXT_ARP:
 570     case IP_LOOKUP_NEXT_GLEAN:
 571       if (NULL != nbr)
 572         {
 573           adj_nbr_walk_nh6 (sw_if_index, &nbr->key.ip6_address,
 574                             ip6_nd_mk_complete_walk, nbr);
 575         }
 576       else
 577         {
 578           /*
 579            * no matching ND entry.
 580            * construct the rewrite required to for an ND packet, and stick
 581            * that in the adj's pipe to smoke.
 582            */
 583           adj_nbr_update_rewrite (ai,
 584                                   ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
 585                                   ethernet_build_rewrite (vnm,
 586                                                           sw_if_index,
 587                                                           VNET_LINK_IP6,
 588                                                           VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
 589
 590           /*
 591            * since the FIB has added this adj for a route, it makes sense it may
 592            * want to forward traffic sometime soon. Let's send a speculative ND.
 593            * just one. If we were to do periodically that wouldn't be bad either,
 594            * but that's more code than i'm prepared to write at this time for
 595            * relatively little reward.
 596            */
 597           ip6_nbr_probe (adj);
 598         }
 599       break;
 600     case IP_LOOKUP_NEXT_MCAST:
 601       {
 602         /*
 603          * Construct a partial rewrite from the known ethernet mcast dest MAC
 604          */
 605         u8 *rewrite;
 606         u8 offset;
 607
 608         rewrite = ethernet_build_rewrite (vnm,
 609                                           sw_if_index,
 610                                           adj->ia_link,
 611                                           ethernet_ip6_mcast_dst_addr ());
 612
 613         /*
 614          * Complete the remaining fields of the adj's rewrite to direct the
 615          * complete of the rewrite at switch time by copying in the IP
 616          * dst address's bytes.
 617          * Ofset is 2 bytes into the desintation address. And we write 4 bytes.
 618          */
 619         offset = vec_len (rewrite) - 2;
 620         adj_mcast_update_rewrite (ai, rewrite, offset, 0xffffffff);
 621
 622         break;
 623       }
 624     case IP_LOOKUP_NEXT_DROP:
 625     case IP_LOOKUP_NEXT_PUNT:
 626     case IP_LOOKUP_NEXT_LOCAL:
 627     case IP_LOOKUP_NEXT_REWRITE:
 628     case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
 629     case IP_LOOKUP_NEXT_MIDCHAIN:
 630     case IP_LOOKUP_NEXT_ICMP_ERROR:
 631     case IP_LOOKUP_N_NEXT:
 632       ASSERT (0);
 633       break;
 634     }
 635 }
 636
 637
 638 static void
 639 ip6_neighbor_adj_fib_add (ip6_neighbor_t * n, u32 fib_index)
 640 {
 641   fib_prefix_t pfx = {
 642     .fp_len = 128,
 643     .fp_proto = FIB_PROTOCOL_IP6,
 644     .fp_addr.ip6 = n->key.ip6_address,
 645   };
 646
 647   n->fib_entry_index =
 648     fib_table_entry_path_add (fib_index, &pfx, FIB_SOURCE_ADJ,
 649                               FIB_ENTRY_FLAG_ATTACHED,
 650                               DPO_PROTO_IP6, &pfx.fp_addr,
 651                               n->key.sw_if_index, ~0, 1, NULL,
 652                               FIB_ROUTE_PATH_FLAG_NONE);
 653 }
 654
 655 int
 656 vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
 657                                 u32 sw_if_index,
 658                                 ip6_address_t * a,
 659                                 u8 * link_layer_address,
 660                                 uword n_bytes_link_layer_address,
 661                                 int is_static, int is_no_fib_entry)
 662 {
 663   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
 664   ip6_neighbor_key_t k;
 665   ip6_neighbor_t *n = 0;
 666   int make_new_nd_cache_entry = 1;
 667   uword *p;
 668   u32 next_index;
 669   pending_resolution_t *pr, *mc;
 670
 671   if (vlib_get_thread_index ())
 672     {
 673       set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
 674                                   1 /* set new neighbor */ , is_static,
 675                                   is_no_fib_entry);
 676       return 0;
 677     }
 678
 679   k.sw_if_index = sw_if_index;
 680   k.ip6_address = a[0];
 681   k.pad = 0;
 682
 683   p = mhash_get (&nm->neighbor_index_by_key, &k);
 684   if (p)
 685     {
 686       n = pool_elt_at_index (nm->neighbor_pool, p[0]);
 687       /* Refuse to over-write static neighbor entry. */
 688       if (!is_static && (n->flags & IP6_NEIGHBOR_FLAG_STATIC))
 689         return -2;
 690       make_new_nd_cache_entry = 0;
 691     }
 692
 693   if (make_new_nd_cache_entry)
 694     {
 695       pool_get (nm->neighbor_pool, n);
 696       mhash_set (&nm->neighbor_index_by_key, &k, n - nm->neighbor_pool,
 697                  /* old value */ 0);
 698       n->key = k;
 699       n->fib_entry_index = FIB_NODE_INDEX_INVALID;
 700
 701       clib_memcpy (n->link_layer_address,
 702                    link_layer_address, n_bytes_link_layer_address);
 703
 704       /*
 705        * create the adj-fib. the entry in the FIB table for and to the peer.
 706        */
 707       if (!is_no_fib_entry)
 708         {
 709           ip6_neighbor_adj_fib_add (n,
 710                                     ip6_fib_table_get_index_for_sw_if_index
 711                                     (n->key.sw_if_index));
 712         }
 713       else
 714         {
 715           n->flags |= IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY;
 716         }
 717     }
 718   else
 719     {
 720       /*
 721        * prevent a DoS attack from the data-plane that
 722        * spams us with no-op updates to the MAC address
 723        */
 724       if (0 == memcmp (n->link_layer_address,
 725                        link_layer_address, n_bytes_link_layer_address))
 726         goto check_customers;
 727
 728       clib_memcpy (n->link_layer_address,
 729                    link_layer_address, n_bytes_link_layer_address);
 730     }
 731
 732   /* Update time stamp and flags. */
 733   n->cpu_time_last_updated = clib_cpu_time_now ();
 734   if (is_static)
 735     n->flags |= IP6_NEIGHBOR_FLAG_STATIC;
 736   else
 737     n->flags |= IP6_NEIGHBOR_FLAG_DYNAMIC;
 738
 739   adj_nbr_walk_nh6 (sw_if_index,
 740                     &n->key.ip6_address, ip6_nd_mk_complete_walk, n);
 741
 742 check_customers:
 743   /* Customer(s) waiting for this address to be resolved? */
 744   p = mhash_get (&nm->pending_resolutions_by_address, a);
 745   if (p)
 746     {
 747       next_index = p[0];
 748
 749       while (next_index != (u32) ~ 0)
 750         {
 751           pr = pool_elt_at_index (nm->pending_resolutions, next_index);
 752           vlib_process_signal_event (vm, pr->node_index,
 753                                      pr->type_opaque, pr->data);
 754           next_index = pr->next_index;
 755           pool_put (nm->pending_resolutions, pr);
 756         }
 757
 758       mhash_unset (&nm->pending_resolutions_by_address, a, 0);
 759     }
 760
 761   /* Customer(s) requesting ND event for this address? */
 762   p = mhash_get (&nm->mac_changes_by_address, a);
 763   if (p)
 764     {
 765       next_index = p[0];
 766
 767       while (next_index != (u32) ~ 0)
 768         {
 769           int (*fp) (u32, u8 *, u32, ip6_address_t *);
 770           int rv = 1;
 771           mc = pool_elt_at_index (nm->mac_changes, next_index);
 772           fp = mc->data_callback;
 773
 774           /* Call the user's data callback, return 1 to suppress dup events */
 775           if (fp)
 776             rv =
 777               (*fp) (mc->data, link_layer_address, sw_if_index, &ip6a_zero);
 778           /*
 779            * Signal the resolver process, as long as the user
 780            * says they want to be notified
 781            */
 782           if (rv == 0)
 783             vlib_process_signal_event (vm, mc->node_index,
 784                                        mc->type_opaque, mc->data);
 785           next_index = mc->next_index;
 786         }
 787     }
 788
 789   return 0;
 790 }
 791
 792 int
 793 vnet_unset_ip6_ethernet_neighbor (vlib_main_t * vm,
 794                                   u32 sw_if_index,
 795                                   ip6_address_t * a,
 796                                   u8 * link_layer_address,
 797                                   uword n_bytes_link_layer_address)
 798 {
 799   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
 800   ip6_neighbor_key_t k;
 801   ip6_neighbor_t *n;
 802   uword *p;
 803   int rv = 0;
 804
 805   if (vlib_get_thread_index ())
 806     {
 807       set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
 808                                   0 /* unset */ , 0, 0);
 809       return 0;
 810     }
 811
 812   k.sw_if_index = sw_if_index;
 813   k.ip6_address = a[0];
 814   k.pad = 0;
 815
 816   p = mhash_get (&nm->neighbor_index_by_key, &k);
 817   if (p == 0)
 818     {
 819       rv = -1;
 820       goto out;
 821     }
 822
 823   n = pool_elt_at_index (nm->neighbor_pool, p[0]);
 824   mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
 825
 826   adj_nbr_walk_nh6 (sw_if_index,
 827                     &n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL);
 828
 829
 830   if (FIB_NODE_INDEX_INVALID != n->fib_entry_index)
 831     {
 832       fib_prefix_t pfx = {
 833         .fp_len = 128,
 834         .fp_proto = FIB_PROTOCOL_IP6,
 835         .fp_addr.ip6 = n->key.ip6_address,
 836       };
 837       fib_table_entry_path_remove
 838         (ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index),
 839          &pfx,
 840          FIB_SOURCE_ADJ,
 841          DPO_PROTO_IP6,
 842          &pfx.fp_addr, n->key.sw_if_index, ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
 843     }
 844   pool_put (nm->neighbor_pool, n);
 845
 846 out:
 847   return rv;
 848 }
 849
 850 static void ip6_neighbor_set_unset_rpc_callback
 851   (ip6_neighbor_set_unset_rpc_args_t * a)
 852 {
 853   vlib_main_t *vm = vlib_get_main ();
 854   if (a->is_add)
 855     vnet_set_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
 856                                     a->link_layer_address, 6, a->is_static,
 857                                     a->is_no_fib_entry);
 858   else
 859     vnet_unset_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
 860                                       a->link_layer_address, 6);
 861 }
 862
 863 static int
 864 ip6_neighbor_sort (void *a1, void *a2)
 865 {
 866   vnet_main_t *vnm = vnet_get_main ();
 867   ip6_neighbor_t *n1 = a1, *n2 = a2;
 868   int cmp;
 869   cmp = vnet_sw_interface_compare (vnm, n1->key.sw_if_index,
 870                                    n2->key.sw_if_index);
 871   if (!cmp)
 872     cmp = ip6_address_compare (&n1->key.ip6_address, &n2->key.ip6_address);
 873   return cmp;
 874 }
 875
 876 ip6_neighbor_t *
 877 ip6_neighbors_entries (u32 sw_if_index)
 878 {
 879   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
 880   ip6_neighbor_t *n, *ns = 0;
 881
 882   /* *INDENT-OFF* */
 883   pool_foreach (n, nm->neighbor_pool,
 884   ({
 885     if (sw_if_index != ~0 && n->key.sw_if_index != sw_if_index)
 886       continue;
 887     vec_add1 (ns, n[0]);
 888   }));
 889   /* *INDENT-ON* */
 890
 891   if (ns)
 892     vec_sort_with_function (ns, ip6_neighbor_sort);
 893   return ns;
 894 }
 895
 896 static clib_error_t *
 897 show_ip6_neighbors (vlib_main_t * vm,
 898                     unformat_input_t * input, vlib_cli_command_t * cmd)
 899 {
 900   vnet_main_t *vnm = vnet_get_main ();
 901   ip6_neighbor_t *n, *ns;
 902   clib_error_t *error = 0;
 903   u32 sw_if_index;
 904
 905   /* Filter entries by interface if given. */
 906   sw_if_index = ~0;
 907   (void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index);
 908
 909   ns = ip6_neighbors_entries (sw_if_index);
 910   if (ns)
 911     {
 912       vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, 0);
 913       vec_foreach (n, ns)
 914       {
 915         vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, n);
 916       }
 917       vec_free (ns);
 918     }
 919
 920   return error;
 921 }
 922
 923 /*?
 924  * This command is used to display the adjacent IPv6 hosts found via
 925  * neighbor discovery. Optionally, limit the output to the specified
 926  * interface.
 927  *
 928  * @cliexpar
 929  * Example of how to display the IPv6 neighbor adjacency table:
 930  * @cliexstart{show ip6 neighbors}
 931  *     Time           Address       Flags     Link layer                     Interface
 932  *      34.0910     ::a:1:1:0:7            02:fe:6a:07:39:6f                GigabitEthernet2/0/0
 933  *     173.2916     ::b:5:1:c:2            02:fe:50:62:3a:94                GigabitEthernet2/0/0
 934  *     886.6654     ::1:1:c:0:9       S    02:fe:e4:45:27:5b                GigabitEthernet3/0/0
 935  * @cliexend
 936  * Example of how to display the IPv6 neighbor adjacency table for given interface:
 937  * @cliexstart{show ip6 neighbors GigabitEthernet2/0/0}
 938  *     Time           Address       Flags     Link layer                     Interface
 939  *      34.0910     ::a:1:1:0:7            02:fe:6a:07:39:6f                GigabitEthernet2/0/0
 940  *     173.2916     ::b:5:1:c:2            02:fe:50:62:3a:94                GigabitEthernet2/0/0
 941  * @cliexend
 942 ?*/
 943 /* *INDENT-OFF* */
 944 VLIB_CLI_COMMAND (show_ip6_neighbors_command, static) = {
 945   .path = "show ip6 neighbors",
 946   .function = show_ip6_neighbors,
 947   .short_help = "show ip6 neighbors [<interface>]",
 948 };
 949 /* *INDENT-ON* */
 950
 951 static clib_error_t *
 952 set_ip6_neighbor (vlib_main_t * vm,
 953                   unformat_input_t * input, vlib_cli_command_t * cmd)
 954 {
 955   vnet_main_t *vnm = vnet_get_main ();
 956   ip6_address_t addr;
 957   u8 mac_address[6];
 958   int addr_valid = 0;
 959   int is_del = 0;
 960   int is_static = 0;
 961   int is_no_fib_entry = 0;
 962   u32 sw_if_index;
 963
 964   while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
 965     {
 966       /* intfc, ip6-address, mac-address */
 967       if (unformat (input, "%U %U %U",
 968                     unformat_vnet_sw_interface, vnm, &sw_if_index,
 969                     unformat_ip6_address, &addr,
 970                     unformat_ethernet_address, mac_address))
 971         addr_valid = 1;
 972
 973       else if (unformat (input, "delete") || unformat (input, "del"))
 974         is_del = 1;
 975       else if (unformat (input, "static"))
 976         is_static = 1;
 977       else if (unformat (input, "no-fib-entry"))
 978         is_no_fib_entry = 1;
 979       else
 980         break;
 981     }
 982
 983   if (!addr_valid)
 984     return clib_error_return (0, "Missing interface, ip6 or hw address");
 985
 986   if (!is_del)
 987     vnet_set_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
 988                                     mac_address, sizeof (mac_address),
 989                                     is_static, is_no_fib_entry);
 990   else
 991     vnet_unset_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
 992                                       mac_address, sizeof (mac_address));
 993   return 0;
 994 }
 995
 996 /*?
 997  * This command is used to manually add an entry to the IPv6 neighbor
 998  * adjacency table. Optionally, the entry can be added as static. It is
 999  * also used to remove an entry from the table. Use the '<em>show ip6
1000  * neighbors</em>' command to display all learned and manually entered entries.
1001  *
1002  * @cliexpar
1003  * Example of how to add a static entry to the IPv6 neighbor adjacency table:
1004  * @cliexcmd{set ip6 neighbor GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b static}
1005  * Example of how to delete an entry from the IPv6 neighbor adjacency table:
1006  * @cliexcmd{set ip6 neighbor del GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b}
1007 ?*/
1008 /* *INDENT-OFF* */
1009 VLIB_CLI_COMMAND (set_ip6_neighbor_command, static) =
1010 {
1011   .path = "set ip6 neighbor",
1012   .function = set_ip6_neighbor,
1013   .short_help = "set ip6 neighbor [del] <interface> <ip6-address> <mac-address> [static]",
1014 };
1015 /* *INDENT-ON* */
1016
1017 typedef enum
1018 {
1019   ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP,
1020   ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY,
1021   ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
1022 } icmp6_neighbor_solicitation_or_advertisement_next_t;
1023
1024 static_always_inline uword
1025 icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
1026                                               vlib_node_runtime_t * node,
1027                                               vlib_frame_t * frame,
1028                                               uword is_solicitation)
1029 {
1030   vnet_main_t *vnm = vnet_get_main ();
1031   ip6_main_t *im = &ip6_main;
1032   uword n_packets = frame->n_vectors;
1033   u32 *from, *to_next;
1034   u32 n_left_from, n_left_to_next, next_index, n_advertisements_sent;
1035   icmp6_neighbor_discovery_option_type_t option_type;
1036   vlib_node_runtime_t *error_node =
1037     vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1038   int bogus_length;
1039
1040   from = vlib_frame_vector_args (frame);
1041   n_left_from = n_packets;
1042   next_index = node->cached_next_index;
1043
1044   if (node->flags & VLIB_NODE_FLAG_TRACE)
1045     vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1046                                    /* stride */ 1,
1047                                    sizeof (icmp6_input_trace_t));
1048
1049   option_type =
1050     (is_solicitation
1051      ? ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address
1052      : ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address);
1053   n_advertisements_sent = 0;
1054
1055   while (n_left_from > 0)
1056     {
1057       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1058
1059       while (n_left_from > 0 && n_left_to_next > 0)
1060         {
1061           vlib_buffer_t *p0;
1062           ip6_header_t *ip0;
1063           icmp6_neighbor_solicitation_or_advertisement_header_t *h0;
1064           icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1065           u32 bi0, options_len0, sw_if_index0, next0, error0;
1066           u32 ip6_sadd_link_local, ip6_sadd_unspecified;
1067           int is_rewrite0;
1068           u32 ni0;
1069
1070           bi0 = to_next[0] = from[0];
1071
1072           from += 1;
1073           to_next += 1;
1074           n_left_from -= 1;
1075           n_left_to_next -= 1;
1076
1077           p0 = vlib_get_buffer (vm, bi0);
1078           ip0 = vlib_buffer_get_current (p0);
1079           h0 = ip6_next_header (ip0);
1080           options_len0 =
1081             clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1082
1083           error0 = ICMP6_ERROR_NONE;
1084           sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1085           ip6_sadd_link_local =
1086             ip6_address_is_link_local_unicast (&ip0->src_address);
1087           ip6_sadd_unspecified =
1088             ip6_address_is_unspecified (&ip0->src_address);
1089
1090           /* Check that source address is unspecified, link-local or else on-link. */
1091           if (!ip6_sadd_unspecified && !ip6_sadd_link_local)
1092             {
1093               u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1094
1095               if (ADJ_INDEX_INVALID != src_adj_index0)
1096                 {
1097                   ip_adjacency_t *adj0 = adj_get (src_adj_index0);
1098
1099                   /* Allow all realistic-looking rewrite adjacencies to pass */
1100                   ni0 = adj0->lookup_next_index;
1101                   is_rewrite0 = (ni0 >= IP_LOOKUP_NEXT_ARP) &&
1102                     (ni0 < IP6_LOOKUP_N_NEXT);
1103
1104                   error0 = ((adj0->rewrite_header.sw_if_index != sw_if_index0
1105                              || !is_rewrite0)
1106                             ?
1107                             ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK
1108                             : error0);
1109                 }
1110               else
1111                 {
1112                   error0 =
1113                     ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK;
1114                 }
1115             }
1116
1117           o0 = (void *) (h0 + 1);
1118           o0 = ((options_len0 == 8 && o0->header.type == option_type
1119                  && o0->header.n_data_u64s == 1) ? o0 : 0);
1120
1121           /* If src address unspecified or link local, donot learn neighbor MAC */
1122           if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1123                             !ip6_sadd_unspecified))
1124             {
1125               ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1126               if (nm->limit_neighbor_cache_size &&
1127                   pool_elts (nm->neighbor_pool) >=
1128                   nm->limit_neighbor_cache_size)
1129                 unset_random_neighbor_entry ();
1130               vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1131                                               is_solicitation ?
1132                                               &ip0->src_address :
1133                                               &h0->target_address,
1134                                               o0->ethernet_address,
1135                                               sizeof (o0->ethernet_address),
1136                                               0, ip6_sadd_link_local);
1137             }
1138
1139           if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1140             {
1141               /* Check that target address is local to this router. */
1142               fib_node_index_t fei;
1143               u32 fib_index;
1144
1145               fib_index =
1146                 ip6_fib_table_get_index_for_sw_if_index (sw_if_index0);
1147
1148               if (~0 == fib_index)
1149                 {
1150                   error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1151                 }
1152               else
1153                 {
1154                   fei = ip6_fib_table_lookup_exact_match (fib_index,
1155                                                           &h0->target_address,
1156                                                           128);
1157
1158                   if (FIB_NODE_INDEX_INVALID == fei)
1159                     {
1160                       /* The target address is not in the FIB */
1161                       error0 =
1162                         ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1163                     }
1164                   else
1165                     {
1166                       if (FIB_ENTRY_FLAG_LOCAL &
1167                           fib_entry_get_flags_for_source (fei,
1168                                                           FIB_SOURCE_INTERFACE))
1169                         {
1170                           /* It's an address that belongs to one of our interfaces
1171                            * that's good. */
1172                         }
1173                       else
1174                         if (fib_entry_is_sourced
1175                             (fei, FIB_SOURCE_IP6_ND_PROXY))
1176                         {
1177                           /* The address was added by IPv6 Proxy ND config.
1178                            * We should only respond to these if the NS arrived on
1179                            * the link that has a matching covering prefix */
1180                         }
1181                       else
1182                         {
1183                           error0 =
1184                             ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1185                         }
1186                     }
1187                 }
1188             }
1189
1190           if (is_solicitation)
1191             next0 = (error0 != ICMP6_ERROR_NONE
1192                      ? ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP
1193                      : ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY);
1194           else
1195             {
1196               next0 = 0;
1197               error0 = error0 == ICMP6_ERROR_NONE ?
1198                 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_RX : error0;
1199             }
1200
1201           if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1202             {
1203               vnet_sw_interface_t *sw_if0;
1204               ethernet_interface_t *eth_if0;
1205               ethernet_header_t *eth0;
1206
1207               /* dst address is either source address or the all-nodes mcast addr */
1208               if (!ip6_sadd_unspecified)
1209                 ip0->dst_address = ip0->src_address;
1210               else
1211                 ip6_set_reserved_multicast_address (&ip0->dst_address,
1212                                                     IP6_MULTICAST_SCOPE_link_local,
1213                                                     IP6_MULTICAST_GROUP_ID_all_hosts);
1214
1215               ip0->src_address = h0->target_address;
1216               ip0->hop_limit = 255;
1217               h0->icmp.type = ICMP6_neighbor_advertisement;
1218
1219               sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1220               ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1221               eth_if0 =
1222                 ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
1223               if (eth_if0 && o0)
1224                 {
1225                   clib_memcpy (o0->ethernet_address, eth_if0->address, 6);
1226                   o0->header.type =
1227                     ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
1228                 }
1229
1230               h0->advertisement_flags = clib_host_to_net_u32
1231                 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED
1232                  | ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
1233
1234               h0->icmp.checksum = 0;
1235               h0->icmp.checksum =
1236                 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1237                                                    &bogus_length);
1238               ASSERT (bogus_length == 0);
1239
1240               /* Reuse current MAC header, copy SMAC to DMAC and
1241                * interface MAC to SMAC */
1242               vlib_buffer_advance (p0, -ethernet_buffer_header_size (p0));
1243               eth0 = vlib_buffer_get_current (p0);
1244               clib_memcpy (eth0->dst_address, eth0->src_address, 6);
1245               if (eth_if0)
1246                 clib_memcpy (eth0->src_address, eth_if0->address, 6);
1247
1248               /* Setup input and output sw_if_index for packet */
1249               ASSERT (vnet_buffer (p0)->sw_if_index[VLIB_RX] == sw_if_index0);
1250               vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1251               vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1252                 vnet_main.local_interface_sw_if_index;
1253
1254               n_advertisements_sent++;
1255             }
1256
1257           p0->error = error_node->errors[error0];
1258
1259           vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1260                                            to_next, n_left_to_next,
1261                                            bi0, next0);
1262         }
1263
1264       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1265     }
1266
1267   /* Account for advertisements sent. */
1268   vlib_error_count (vm, error_node->node_index,
1269                     ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX,
1270                     n_advertisements_sent);
1271
1272   return frame->n_vectors;
1273 }
1274
1275 /* for "syslogging" - use elog for now */
1276 #define foreach_log_level            \
1277   _ (DEBUG, "DEBUG")                         \
1278   _ (INFO, "INFORMATION")            \
1279   _ (NOTICE, "NOTICE")               \
1280   _ (WARNING, "WARNING")             \
1281   _ (ERR, "ERROR")                                    \
1282   _ (CRIT, "CRITICAL")                        \
1283   _ (ALERT, "ALERT")                          \
1284   _ (EMERG,  "EMERGENCY")
1285
1286 typedef enum
1287 {
1288 #define _(f,s) LOG_##f,
1289   foreach_log_level
1290 #undef _
1291 } log_level_t;
1292
1293 static char *log_level_strings[] = {
1294 #define _(f,s) s,
1295   foreach_log_level
1296 #undef _
1297 };
1298
1299 static int logmask = 1 << LOG_DEBUG;
1300
1301 static void
1302 ip6_neighbor_syslog (vlib_main_t * vm, int priority, char *fmt, ...)
1303 {
1304   /* just use elog for now */
1305   u8 *what;
1306   va_list va;
1307
1308   if ((priority > LOG_EMERG) || !(logmask & (1 << priority)))
1309     return;
1310
1311   va_start (va, fmt);
1312   if (fmt)
1313     {
1314       what = va_format (0, fmt, &va);
1315
1316       ELOG_TYPE_DECLARE (e) =
1317       {
1318       .format = "ip6 nd:  (%s): %s",.format_args = "T4T4",};
1319       struct
1320       {
1321         u32 s[2];
1322       } *ed;
1323       ed = ELOG_DATA (&vm->elog_main, e);
1324       ed->s[0] = elog_string (&vm->elog_main, log_level_strings[priority]);
1325       ed->s[1] = elog_string (&vm->elog_main, (char *) what);
1326     }
1327   va_end (va);
1328   return;
1329 }
1330
1331 /* ipv6 neighbor discovery - router advertisements */
1332 typedef enum
1333 {
1334   ICMP6_ROUTER_SOLICITATION_NEXT_DROP,
1335   ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW,
1336   ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX,
1337   ICMP6_ROUTER_SOLICITATION_N_NEXT,
1338 } icmp6_router_solicitation_or_advertisement_next_t;
1339
1340 static_always_inline uword
1341 icmp6_router_solicitation (vlib_main_t * vm,
1342                            vlib_node_runtime_t * node, vlib_frame_t * frame)
1343 {
1344   vnet_main_t *vnm = vnet_get_main ();
1345   ip6_main_t *im = &ip6_main;
1346   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1347   uword n_packets = frame->n_vectors;
1348   u32 *from, *to_next;
1349   u32 n_left_from, n_left_to_next, next_index;
1350   u32 n_advertisements_sent = 0;
1351   int bogus_length;
1352
1353   icmp6_neighbor_discovery_option_type_t option_type;
1354
1355   vlib_node_runtime_t *error_node =
1356     vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1357
1358   from = vlib_frame_vector_args (frame);
1359   n_left_from = n_packets;
1360   next_index = node->cached_next_index;
1361
1362   if (node->flags & VLIB_NODE_FLAG_TRACE)
1363     vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1364                                    /* stride */ 1,
1365                                    sizeof (icmp6_input_trace_t));
1366
1367   /* source may append his LL address */
1368   option_type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1369
1370   while (n_left_from > 0)
1371     {
1372       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1373
1374       while (n_left_from > 0 && n_left_to_next > 0)
1375         {
1376           vlib_buffer_t *p0;
1377           ip6_header_t *ip0;
1378           ip6_radv_t *radv_info = 0;
1379
1380           icmp6_neighbor_discovery_header_t *h0;
1381           icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1382
1383           u32 bi0, options_len0, sw_if_index0, next0, error0;
1384           u32 is_solicitation = 1, is_dropped = 0;
1385           u32 is_unspecified, is_link_local;
1386
1387           bi0 = to_next[0] = from[0];
1388
1389           from += 1;
1390           to_next += 1;
1391           n_left_from -= 1;
1392           n_left_to_next -= 1;
1393
1394           p0 = vlib_get_buffer (vm, bi0);
1395           ip0 = vlib_buffer_get_current (p0);
1396           h0 = ip6_next_header (ip0);
1397           options_len0 =
1398             clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1399           is_unspecified = ip6_address_is_unspecified (&ip0->src_address);
1400           is_link_local =
1401             ip6_address_is_link_local_unicast (&ip0->src_address);
1402
1403           error0 = ICMP6_ERROR_NONE;
1404           sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1405
1406           /* check if solicitation  (not from nd_timer node) */
1407           if (ip6_address_is_unspecified (&ip0->dst_address))
1408             is_solicitation = 0;
1409
1410           /* Check that source address is unspecified, link-local or else on-link. */
1411           if (!is_unspecified && !is_link_local)
1412             {
1413               u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1414
1415               if (ADJ_INDEX_INVALID != src_adj_index0)
1416                 {
1417                   ip_adjacency_t *adj0 = adj_get (src_adj_index0);
1418
1419                   error0 = (adj0->rewrite_header.sw_if_index != sw_if_index0
1420                             ?
1421                             ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK
1422                             : error0);
1423                 }
1424               else
1425                 {
1426                   error0 = ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK;
1427                 }
1428             }
1429
1430           /* check for source LL option and process */
1431           o0 = (void *) (h0 + 1);
1432           o0 = ((options_len0 == 8
1433                  && o0->header.type == option_type
1434                  && o0->header.n_data_u64s == 1) ? o0 : 0);
1435
1436           /* if src address unspecified IGNORE any options */
1437           if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1438                             !is_unspecified && !is_link_local))
1439             {
1440               ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1441               if (nm->limit_neighbor_cache_size &&
1442                   pool_elts (nm->neighbor_pool) >=
1443                   nm->limit_neighbor_cache_size)
1444                 unset_random_neighbor_entry ();
1445
1446               vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1447                                               &ip0->src_address,
1448                                               o0->ethernet_address,
1449                                               sizeof (o0->ethernet_address),
1450                                               0, 0);
1451             }
1452
1453           /* default is to drop */
1454           next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1455
1456           if (error0 == ICMP6_ERROR_NONE)
1457             {
1458               vnet_sw_interface_t *sw_if0;
1459               ethernet_interface_t *eth_if0;
1460               u32 adj_index0;
1461
1462               sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1463               ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1464               eth_if0 =
1465                 ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
1466
1467               /* only support ethernet interface type for now */
1468               error0 =
1469                 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1470                 : error0;
1471
1472               if (error0 == ICMP6_ERROR_NONE)
1473                 {
1474                   u32 ri;
1475
1476                   /* adjust the sizeof the buffer to just include the ipv6 header */
1477                   p0->current_length -=
1478                     (options_len0 +
1479                      sizeof (icmp6_neighbor_discovery_header_t));
1480
1481                   /* look up the radv_t information for this interface */
1482                   vec_validate_init_empty
1483                     (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
1484
1485                   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1486
1487                   if (ri != ~0)
1488                     radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1489
1490                   error0 =
1491                     ((!radv_info) ?
1492                      ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1493                      error0);
1494
1495                   if (error0 == ICMP6_ERROR_NONE)
1496                     {
1497                       f64 now = vlib_time_now (vm);
1498
1499                       /* for solicited adverts - need to rate limit */
1500                       if (is_solicitation)
1501                         {
1502                           if (0 != radv_info->last_radv_time &&
1503                               (now - radv_info->last_radv_time) <
1504                               MIN_DELAY_BETWEEN_RAS)
1505                             is_dropped = 1;
1506                           else
1507                             radv_info->last_radv_time = now;
1508                         }
1509
1510                       /* send now  */
1511                       icmp6_router_advertisement_header_t rh;
1512
1513                       rh.icmp.type = ICMP6_router_advertisement;
1514                       rh.icmp.code = 0;
1515                       rh.icmp.checksum = 0;
1516
1517                       rh.current_hop_limit = radv_info->curr_hop_limit;
1518                       rh.router_lifetime_in_sec =
1519                         clib_host_to_net_u16
1520                         (radv_info->adv_router_lifetime_in_sec);
1521                       rh.
1522                         time_in_msec_between_retransmitted_neighbor_solicitations
1523                         =
1524                         clib_host_to_net_u32 (radv_info->
1525                                               adv_time_in_msec_between_retransmitted_neighbor_solicitations);
1526                       rh.neighbor_reachable_time_in_msec =
1527                         clib_host_to_net_u32 (radv_info->
1528                                               adv_neighbor_reachable_time_in_msec);
1529
1530                       rh.flags =
1531                         (radv_info->adv_managed_flag) ?
1532                         ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP :
1533                         0;
1534                       rh.flags |=
1535                         ((radv_info->adv_other_flag) ?
1536                          ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP :
1537                          0);
1538
1539
1540                       u16 payload_length =
1541                         sizeof (icmp6_router_advertisement_header_t);
1542
1543                       vlib_buffer_add_data (vm,
1544                                             vlib_buffer_get_free_list_index
1545                                             (p0), bi0, (void *) &rh,
1546                                             sizeof
1547                                             (icmp6_router_advertisement_header_t));
1548
1549                       if (radv_info->adv_link_layer_address)
1550                         {
1551                           icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
1552                             h;
1553
1554                           h.header.type =
1555                             ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1556                           h.header.n_data_u64s = 1;
1557
1558                           /* copy ll address */
1559                           clib_memcpy (&h.ethernet_address[0],
1560                                        eth_if0->address, 6);
1561
1562                           vlib_buffer_add_data (vm,
1563                                                 vlib_buffer_get_free_list_index
1564                                                 (p0), bi0, (void *) &h,
1565                                                 sizeof
1566                                                 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t));
1567
1568                           payload_length +=
1569                             sizeof
1570                             (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t);
1571                         }
1572
1573                       /* add MTU option */
1574                       if (radv_info->adv_link_mtu)
1575                         {
1576                           icmp6_neighbor_discovery_mtu_option_t h;
1577
1578                           h.unused = 0;
1579                           h.mtu =
1580                             clib_host_to_net_u32 (radv_info->adv_link_mtu);
1581                           h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu;
1582                           h.header.n_data_u64s = 1;
1583
1584                           payload_length +=
1585                             sizeof (icmp6_neighbor_discovery_mtu_option_t);
1586
1587                           vlib_buffer_add_data (vm,
1588                                                 vlib_buffer_get_free_list_index
1589                                                 (p0), bi0, (void *) &h,
1590                                                 sizeof
1591                                                 (icmp6_neighbor_discovery_mtu_option_t));
1592                         }
1593
1594                       /* add advertised prefix options  */
1595                       ip6_radv_prefix_t *pr_info;
1596
1597                       /* *INDENT-OFF* */
1598                       pool_foreach (pr_info, radv_info->adv_prefixes_pool,
1599                       ({
1600                         if(pr_info->enabled &&
1601                            (!pr_info->decrement_lifetime_flag
1602                             || (pr_info->pref_lifetime_expires >0)))
1603                           {
1604                             /* advertise this prefix */
1605                             icmp6_neighbor_discovery_prefix_information_option_t h;
1606
1607                             h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information;
1608                             h.header.n_data_u64s  =  (sizeof(icmp6_neighbor_discovery_prefix_information_option_t) >> 3);
1609
1610                             h.dst_address_length  = pr_info->prefix_len;
1611
1612                             h.flags  = (pr_info->adv_on_link_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_FLAG_ON_LINK : 0;
1613                             h.flags |= (pr_info->adv_autonomous_flag) ?  ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_AUTO :  0;
1614
1615                             if(radv_info->cease_radv && pr_info->deprecated_prefix_flag)
1616                               {
1617                                 h.valid_time = clib_host_to_net_u32(MIN_ADV_VALID_LIFETIME);
1618                                 h.preferred_time  = 0;
1619                               }
1620                             else
1621                               {
1622                                 if(pr_info->decrement_lifetime_flag)
1623                                   {
1624                                     pr_info->adv_valid_lifetime_in_secs = ((pr_info->valid_lifetime_expires  > now)) ?
1625                                       (pr_info->valid_lifetime_expires  - now) : 0;
1626
1627                                     pr_info->adv_pref_lifetime_in_secs = ((pr_info->pref_lifetime_expires  > now)) ?
1628                                       (pr_info->pref_lifetime_expires  - now) : 0;
1629                                   }
1630
1631                                 h.valid_time = clib_host_to_net_u32(pr_info->adv_valid_lifetime_in_secs);
1632                                 h.preferred_time  = clib_host_to_net_u32(pr_info->adv_pref_lifetime_in_secs) ;
1633                               }
1634                             h.unused  = 0;
1635
1636                             clib_memcpy(&h.dst_address, &pr_info->prefix,  sizeof(ip6_address_t));
1637
1638                             payload_length += sizeof( icmp6_neighbor_discovery_prefix_information_option_t);
1639
1640                             vlib_buffer_add_data (vm,
1641                                             vlib_buffer_get_free_list_index (p0),
1642                                                   bi0,
1643                                                   (void *)&h, sizeof(icmp6_neighbor_discovery_prefix_information_option_t));
1644
1645                           }
1646                       }));
1647                       /* *INDENT-ON* */
1648
1649                       /* add additional options before here */
1650
1651                       /* finish building the router advertisement... */
1652                       if (!is_unspecified && radv_info->send_unicast)
1653                         {
1654                           ip0->dst_address = ip0->src_address;
1655                         }
1656                       else
1657                         {
1658                           /* target address is all-nodes mcast addr */
1659                           ip6_set_reserved_multicast_address
1660                             (&ip0->dst_address,
1661                              IP6_MULTICAST_SCOPE_link_local,
1662                              IP6_MULTICAST_GROUP_ID_all_hosts);
1663                         }
1664
1665                       /* source address MUST be the link-local address */
1666                       ip0->src_address = radv_info->link_local_address;
1667
1668                       ip0->hop_limit = 255;
1669                       ip0->payload_length =
1670                         clib_host_to_net_u16 (payload_length);
1671
1672                       icmp6_router_advertisement_header_t *rh0 =
1673                         (icmp6_router_advertisement_header_t *) (ip0 + 1);
1674                       rh0->icmp.checksum =
1675                         ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1676                                                            &bogus_length);
1677                       ASSERT (bogus_length == 0);
1678
1679                       /* setup output if and adjacency */
1680                       vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1681                         vnet_main.local_interface_sw_if_index;
1682
1683                       if (is_solicitation)
1684                         {
1685                           ethernet_header_t *eth0;
1686                           /* Reuse current MAC header, copy SMAC to DMAC and
1687                            * interface MAC to SMAC */
1688                           vlib_buffer_reset (p0);
1689                           eth0 = vlib_buffer_get_current (p0);
1690                           clib_memcpy (eth0->dst_address, eth0->src_address,
1691                                        6);
1692                           clib_memcpy (eth0->src_address, eth_if0->address,
1693                                        6);
1694                           next0 =
1695                             is_dropped ? next0 :
1696                             ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX;
1697                           vnet_buffer (p0)->sw_if_index[VLIB_TX] =
1698                             sw_if_index0;
1699                         }
1700                       else
1701                         {
1702                           adj_index0 = radv_info->mcast_adj_index;
1703                           if (adj_index0 == 0)
1704                             error0 = ICMP6_ERROR_DST_LOOKUP_MISS;
1705                           else
1706                             {
1707                               next0 =
1708                                 is_dropped ? next0 :
1709                                 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW;
1710                               vnet_buffer (p0)->ip.adj_index[VLIB_TX] =
1711                                 adj_index0;
1712                             }
1713                         }
1714                       p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
1715
1716                       radv_info->n_solicitations_dropped += is_dropped;
1717                       radv_info->n_solicitations_rcvd += is_solicitation;
1718
1719                       if ((error0 == ICMP6_ERROR_NONE) && !is_dropped)
1720                         {
1721                           radv_info->n_advertisements_sent++;
1722                           n_advertisements_sent++;
1723                         }
1724                     }
1725                 }
1726             }
1727
1728           p0->error = error_node->errors[error0];
1729
1730           if (error0 != ICMP6_ERROR_NONE)
1731             vlib_error_count (vm, error_node->node_index, error0, 1);
1732
1733           vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1734                                            to_next, n_left_to_next,
1735                                            bi0, next0);
1736
1737         }
1738
1739       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1740     }
1741
1742   /* Account for router advertisements sent. */
1743   vlib_error_count (vm, error_node->node_index,
1744                     ICMP6_ERROR_ROUTER_ADVERTISEMENTS_TX,
1745                     n_advertisements_sent);
1746
1747   return frame->n_vectors;
1748 }
1749
1750  /* validate advertised info for consistancy (see RFC-4861 section 6.2.7) - log any inconsistencies, packet will always  be dropped  */
1751 static_always_inline uword
1752 icmp6_router_advertisement (vlib_main_t * vm,
1753                             vlib_node_runtime_t * node, vlib_frame_t * frame)
1754 {
1755   vnet_main_t *vnm = vnet_get_main ();
1756   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1757   uword n_packets = frame->n_vectors;
1758   u32 *from, *to_next;
1759   u32 n_left_from, n_left_to_next, next_index;
1760   u32 n_advertisements_rcvd = 0;
1761
1762   vlib_node_runtime_t *error_node =
1763     vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1764
1765   from = vlib_frame_vector_args (frame);
1766   n_left_from = n_packets;
1767   next_index = node->cached_next_index;
1768
1769   if (node->flags & VLIB_NODE_FLAG_TRACE)
1770     vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1771                                    /* stride */ 1,
1772                                    sizeof (icmp6_input_trace_t));
1773
1774   while (n_left_from > 0)
1775     {
1776       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1777
1778       while (n_left_from > 0 && n_left_to_next > 0)
1779         {
1780           vlib_buffer_t *p0;
1781           ip6_header_t *ip0;
1782           ip6_radv_t *radv_info = 0;
1783           icmp6_router_advertisement_header_t *h0;
1784           u32 bi0, options_len0, sw_if_index0, next0, error0;
1785
1786           bi0 = to_next[0] = from[0];
1787
1788           from += 1;
1789           to_next += 1;
1790           n_left_from -= 1;
1791           n_left_to_next -= 1;
1792
1793           p0 = vlib_get_buffer (vm, bi0);
1794           ip0 = vlib_buffer_get_current (p0);
1795           h0 = ip6_next_header (ip0);
1796           options_len0 =
1797             clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1798
1799           error0 = ICMP6_ERROR_NONE;
1800           sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1801
1802           /* Check that source address is link-local */
1803           error0 = (!ip6_address_is_link_local_unicast (&ip0->src_address)) ?
1804             ICMP6_ERROR_ROUTER_ADVERTISEMENT_SOURCE_NOT_LINK_LOCAL : error0;
1805
1806           /* default is to drop */
1807           next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1808
1809           n_advertisements_rcvd++;
1810
1811           if (error0 == ICMP6_ERROR_NONE)
1812             {
1813               vnet_sw_interface_t *sw_if0;
1814               ethernet_interface_t *eth_if0;
1815
1816               sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1817               ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1818               eth_if0 =
1819                 ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
1820
1821               /* only support ethernet interface type for now */
1822               error0 =
1823                 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1824                 : error0;
1825
1826               if (error0 == ICMP6_ERROR_NONE)
1827                 {
1828                   u32 ri;
1829
1830                   /* look up the radv_t information for this interface */
1831                   vec_validate_init_empty
1832                     (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
1833
1834                   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1835
1836                   if (ri != ~0)
1837                     radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1838
1839                   error0 =
1840                     ((!radv_info) ?
1841                      ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1842                      error0);
1843
1844                   if (error0 == ICMP6_ERROR_NONE)
1845                     {
1846                       /* validate advertised information */
1847                       if ((h0->current_hop_limit && radv_info->curr_hop_limit)
1848                           && (h0->current_hop_limit !=
1849                               radv_info->curr_hop_limit))
1850                         {
1851                           ip6_neighbor_syslog (vm, LOG_WARNING,
1852                                                "our AdvCurHopLimit on %U doesn't agree with %U",
1853                                                format_vnet_sw_if_index_name,
1854                                                vnm, sw_if_index0,
1855                                                format_ip6_address,
1856                                                &ip0->src_address);
1857                         }
1858
1859                       if ((h0->flags &
1860                            ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP)
1861                           != radv_info->adv_managed_flag)
1862                         {
1863                           ip6_neighbor_syslog (vm, LOG_WARNING,
1864                                                "our AdvManagedFlag on %U doesn't agree with %U",
1865                                                format_vnet_sw_if_index_name,
1866                                                vnm, sw_if_index0,
1867                                                format_ip6_address,
1868                                                &ip0->src_address);
1869                         }
1870
1871                       if ((h0->flags &
1872                            ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP)
1873                           != radv_info->adv_other_flag)
1874                         {
1875                           ip6_neighbor_syslog (vm, LOG_WARNING,
1876                                                "our AdvOtherConfigFlag on %U doesn't agree with %U",
1877                                                format_vnet_sw_if_index_name,
1878                                                vnm, sw_if_index0,
1879                                                format_ip6_address,
1880                                                &ip0->src_address);
1881                         }
1882
1883                       if ((h0->
1884                            time_in_msec_between_retransmitted_neighbor_solicitations
1885                            && radv_info->
1886                            adv_time_in_msec_between_retransmitted_neighbor_solicitations)
1887                           && (h0->
1888                               time_in_msec_between_retransmitted_neighbor_solicitations
1889                               !=
1890                               clib_host_to_net_u32 (radv_info->
1891                                                     adv_time_in_msec_between_retransmitted_neighbor_solicitations)))
1892                         {
1893                           ip6_neighbor_syslog (vm, LOG_WARNING,
1894                                                "our AdvRetransTimer on %U doesn't agree with %U",
1895                                                format_vnet_sw_if_index_name,
1896                                                vnm, sw_if_index0,
1897                                                format_ip6_address,
1898                                                &ip0->src_address);
1899                         }
1900
1901                       if ((h0->neighbor_reachable_time_in_msec &&
1902                            radv_info->adv_neighbor_reachable_time_in_msec) &&
1903                           (h0->neighbor_reachable_time_in_msec !=
1904                            clib_host_to_net_u32
1905                            (radv_info->adv_neighbor_reachable_time_in_msec)))
1906                         {
1907                           ip6_neighbor_syslog (vm, LOG_WARNING,
1908                                                "our AdvReachableTime on %U doesn't agree with %U",
1909                                                format_vnet_sw_if_index_name,
1910                                                vnm, sw_if_index0,
1911                                                format_ip6_address,
1912                                                &ip0->src_address);
1913                         }
1914
1915                       /* check for MTU or prefix options or .. */
1916                       u8 *opt_hdr = (u8 *) (h0 + 1);
1917                       while (options_len0 > 0)
1918                         {
1919                           icmp6_neighbor_discovery_option_header_t *o0 =
1920                             (icmp6_neighbor_discovery_option_header_t *)
1921                             opt_hdr;
1922                           int opt_len = o0->n_data_u64s << 3;
1923                           icmp6_neighbor_discovery_option_type_t option_type =
1924                             o0->type;
1925
1926                           if (options_len0 < 2)
1927                             {
1928                               ip6_neighbor_syslog (vm, LOG_ERR,
1929                                                    "malformed RA packet on %U from %U",
1930                                                    format_vnet_sw_if_index_name,
1931                                                    vnm, sw_if_index0,
1932                                                    format_ip6_address,
1933                                                    &ip0->src_address);
1934                               break;
1935                             }
1936
1937                           if (opt_len == 0)
1938                             {
1939                               ip6_neighbor_syslog (vm, LOG_ERR,
1940                                                    " zero length option in RA on %U from %U",
1941                                                    format_vnet_sw_if_index_name,
1942                                                    vnm, sw_if_index0,
1943                                                    format_ip6_address,
1944                                                    &ip0->src_address);
1945                               break;
1946                             }
1947                           else if (opt_len > options_len0)
1948                             {
1949                               ip6_neighbor_syslog (vm, LOG_ERR,
1950                                                    "option length in RA packet  greater than total length on %U from %U",
1951                                                    format_vnet_sw_if_index_name,
1952                                                    vnm, sw_if_index0,
1953                                                    format_ip6_address,
1954                                                    &ip0->src_address);
1955                               break;
1956                             }
1957
1958                           options_len0 -= opt_len;
1959                           opt_hdr += opt_len;
1960
1961                           switch (option_type)
1962                             {
1963                             case ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu:
1964                               {
1965                                 icmp6_neighbor_discovery_mtu_option_t *h =
1966                                   (icmp6_neighbor_discovery_mtu_option_t
1967                                    *) (o0);
1968
1969                                 if (opt_len < sizeof (*h))
1970                                   break;
1971
1972                                 if ((h->mtu && radv_info->adv_link_mtu) &&
1973                                     (h->mtu !=
1974                                      clib_host_to_net_u32
1975                                      (radv_info->adv_link_mtu)))
1976                                   {
1977                                     ip6_neighbor_syslog (vm, LOG_WARNING,
1978                                                          "our AdvLinkMTU on %U doesn't agree with %U",
1979                                                          format_vnet_sw_if_index_name,
1980                                                          vnm, sw_if_index0,
1981                                                          format_ip6_address,
1982                                                          &ip0->src_address);
1983                                   }
1984                               }
1985                               break;
1986
1987                             case ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information:
1988                               {
1989                                 icmp6_neighbor_discovery_prefix_information_option_t
1990                                   * h =
1991                                   (icmp6_neighbor_discovery_prefix_information_option_t
1992                                    *) (o0);
1993
1994                                 /* validate advertised prefix options  */
1995                                 ip6_radv_prefix_t *pr_info;
1996                                 u32 preferred, valid;
1997
1998                                 if (opt_len < sizeof (*h))
1999                                   break;
2000
2001                                 preferred =
2002                                   clib_net_to_host_u32 (h->preferred_time);
2003                                 valid = clib_net_to_host_u32 (h->valid_time);
2004
2005                                 /* look for matching prefix - if we our advertising it, it better be consistant */
2006                                 /* *INDENT-OFF* */
2007                                 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
2008                                 ({
2009
2010                                   ip6_address_t mask;
2011                                   ip6_address_mask_from_width(&mask, pr_info->prefix_len);
2012
2013                                   if(pr_info->enabled &&
2014                                      (pr_info->prefix_len == h->dst_address_length) &&
2015                                      ip6_address_is_equal_masked (&pr_info->prefix,  &h->dst_address, &mask))
2016                                     {
2017                                       /* found it */
2018                                       if(!pr_info->decrement_lifetime_flag &&
2019                                          valid != pr_info->adv_valid_lifetime_in_secs)
2020                                         {
2021                                           ip6_neighbor_syslog(vm,  LOG_WARNING,
2022                                                               "our ADV validlifetime on  %U for %U does not  agree with %U",
2023                                                               format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
2024                                                               format_ip6_address, &h->dst_address);
2025                                         }
2026                                       if(!pr_info->decrement_lifetime_flag &&
2027                                          preferred != pr_info->adv_pref_lifetime_in_secs)
2028                                         {
2029                                           ip6_neighbor_syslog(vm,  LOG_WARNING,
2030                                                               "our ADV preferredlifetime on  %U for %U does not  agree with %U",
2031                                                               format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
2032                                                               format_ip6_address, &h->dst_address);
2033                                         }
2034                                     }
2035                                   break;
2036                                 }));
2037                                 /* *INDENT-ON* */
2038                                 break;
2039                               }
2040                             default:
2041                               /* skip this one */
2042                               break;
2043                             }
2044                         }
2045                     }
2046                 }
2047             }
2048
2049           p0->error = error_node->errors[error0];
2050
2051           if (error0 != ICMP6_ERROR_NONE)
2052             vlib_error_count (vm, error_node->node_index, error0, 1);
2053
2054           vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2055                                            to_next, n_left_to_next,
2056                                            bi0, next0);
2057         }
2058
2059       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2060     }
2061
2062   /* Account for router advertisements sent. */
2063   vlib_error_count (vm, error_node->node_index,
2064                     ICMP6_ERROR_ROUTER_ADVERTISEMENTS_RX,
2065                     n_advertisements_rcvd);
2066
2067   return frame->n_vectors;
2068 }
2069
2070 /**
2071  * @brief Add a multicast Address to the advertised MLD set
2072  */
2073 static void
2074 ip6_neighbor_add_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2075 {
2076   ip6_mldp_group_t *mcast_group_info;
2077   uword *p;
2078
2079   /* lookup  mldp info for this interface */
2080   p = mhash_get (&radv_info->address_to_mldp_index, &addr);
2081   mcast_group_info =
2082     p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2083
2084   /* add address */
2085   if (!mcast_group_info)
2086     {
2087       /* add */
2088       u32 mi;
2089       pool_get (radv_info->mldp_group_pool, mcast_group_info);
2090
2091       mi = mcast_group_info - radv_info->mldp_group_pool;
2092       mhash_set (&radv_info->address_to_mldp_index, &addr, mi,  /* old_value */
2093                  0);
2094
2095       mcast_group_info->type = 4;
2096       mcast_group_info->mcast_source_address_pool = 0;
2097       mcast_group_info->num_sources = 0;
2098       clib_memcpy (&mcast_group_info->mcast_address, &addr,
2099                    sizeof (ip6_address_t));
2100     }
2101 }
2102
2103 /**
2104  * @brief Delete a multicast Address from the advertised MLD set
2105  */
2106 static void
2107 ip6_neighbor_del_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2108 {
2109   ip6_mldp_group_t *mcast_group_info;
2110   uword *p;
2111
2112   p = mhash_get (&radv_info->address_to_mldp_index, &addr);
2113   mcast_group_info =
2114     p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2115
2116   if (mcast_group_info)
2117     {
2118       mhash_unset (&radv_info->address_to_mldp_index, &addr,
2119                    /* old_value */ 0);
2120       pool_put (radv_info->mldp_group_pool, mcast_group_info);
2121     }
2122 }
2123
2124 /**
2125  * @brief Add a multicast Address to the advertised MLD set
2126  */
2127 static void
2128 ip6_neighbor_add_mld_grp (ip6_radv_t * a,
2129                           ip6_multicast_address_scope_t scope,
2130                           ip6_multicast_link_local_group_id_t group)
2131 {
2132   ip6_address_t addr;
2133
2134   ip6_set_reserved_multicast_address (&addr, scope, group);
2135
2136   ip6_neighbor_add_mld_prefix (a, &addr);
2137 }
2138
2139 /**
2140  * @brief create and initialize router advertisement parameters with default
2141  * values for this intfc
2142  */
2143 u32
2144 ip6_neighbor_sw_interface_add_del (vnet_main_t * vnm,
2145                                    u32 sw_if_index, u32 is_add)
2146 {
2147   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2148   ip6_radv_t *a = 0;
2149   u32 ri = ~0;
2150   vnet_sw_interface_t *sw_if0;
2151   ethernet_interface_t *eth_if0 = 0;
2152
2153   /* lookup radv container  - ethernet interfaces only */
2154   sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2155   if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2156     eth_if0 = ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
2157
2158   if (!eth_if0)
2159     return ri;
2160
2161   vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2162                            ~0);
2163   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2164
2165   if (ri != ~0)
2166     {
2167       a = pool_elt_at_index (nm->if_radv_pool, ri);
2168
2169       if (!is_add)
2170         {
2171           ip6_radv_prefix_t *p;
2172           ip6_mldp_group_t *m;
2173
2174           /* release the lock on the interface's mcast adj */
2175           adj_unlock (a->mcast_adj_index);
2176
2177           /* clean up prefix and MDP pools */
2178           /* *INDENT-OFF* */
2179           pool_flush(p, a->adv_prefixes_pool,
2180           ({
2181               mhash_unset (&a->address_to_prefix_index, &p->prefix, 0);
2182           }));
2183           pool_flush (m, a->mldp_group_pool,
2184           ({
2185               mhash_unset (&a->address_to_mldp_index, &m->mcast_address, 0);
2186           }));
2187           /* *INDENT-ON* */
2188
2189           pool_free (a->mldp_group_pool);
2190           pool_free (a->adv_prefixes_pool);
2191
2192           mhash_free (&a->address_to_prefix_index);
2193           mhash_free (&a->address_to_mldp_index);
2194
2195           pool_put (nm->if_radv_pool, a);
2196           nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ~0;
2197           ri = ~0;
2198         }
2199     }
2200   else
2201     {
2202       if (is_add)
2203         {
2204           vnet_hw_interface_t *hw_if0;
2205
2206           hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index);
2207
2208           pool_get (nm->if_radv_pool, a);
2209
2210           ri = a - nm->if_radv_pool;
2211           nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ri;
2212
2213           /* initialize default values (most of which are zero) */
2214           memset (a, 0, sizeof (a[0]));
2215
2216           a->sw_if_index = sw_if_index;
2217           a->max_radv_interval = DEF_MAX_RADV_INTERVAL;
2218           a->min_radv_interval = DEF_MIN_RADV_INTERVAL;
2219           a->curr_hop_limit = DEF_CURR_HOP_LIMIT;
2220           a->adv_router_lifetime_in_sec = DEF_DEF_RTR_LIFETIME;
2221
2222           /* send ll address source address option */
2223           a->adv_link_layer_address = 1;
2224
2225           a->min_delay_between_radv = MIN_DELAY_BETWEEN_RAS;
2226           a->max_delay_between_radv = MAX_DELAY_BETWEEN_RAS;
2227           a->max_rtr_default_lifetime = MAX_DEF_RTR_LIFETIME;
2228           a->seed = (u32) clib_cpu_time_now ();
2229           (void) random_u32 (&a->seed);
2230           a->randomizer = clib_cpu_time_now ();
2231           (void) random_u64 (&a->randomizer);
2232
2233           a->initial_adverts_count = MAX_INITIAL_RTR_ADVERTISEMENTS;
2234           a->initial_adverts_sent = a->initial_adverts_count - 1;
2235           a->initial_adverts_interval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
2236
2237           /* deafult is to send */
2238           a->send_radv = 1;
2239
2240           /* fill in radv_info for this interface that will be needed later */
2241           a->adv_link_mtu = hw_if0->max_l3_packet_bytes[VLIB_RX];
2242
2243           clib_memcpy (a->link_layer_address, eth_if0->address, 6);
2244
2245           /* fill in default link-local address  (this may be overridden) */
2246           ip6_link_local_address_from_ethernet_address
2247             (&a->link_local_address, eth_if0->address);
2248
2249           mhash_init (&a->address_to_prefix_index, sizeof (uword),
2250                       sizeof (ip6_address_t));
2251           mhash_init (&a->address_to_mldp_index, sizeof (uword),
2252                       sizeof (ip6_address_t));
2253
2254           a->mcast_adj_index = adj_mcast_add_or_lock (FIB_PROTOCOL_IP6,
2255                                                       VNET_LINK_IP6,
2256                                                       sw_if_index);
2257
2258           /* add multicast groups we will always be reporting  */
2259           ip6_neighbor_add_mld_grp (a,
2260                                     IP6_MULTICAST_SCOPE_link_local,
2261                                     IP6_MULTICAST_GROUP_ID_all_hosts);
2262           ip6_neighbor_add_mld_grp (a,
2263                                     IP6_MULTICAST_SCOPE_link_local,
2264                                     IP6_MULTICAST_GROUP_ID_all_routers);
2265           ip6_neighbor_add_mld_grp (a,
2266                                     IP6_MULTICAST_SCOPE_link_local,
2267                                     IP6_MULTICAST_GROUP_ID_mldv2_routers);
2268         }
2269     }
2270   return ri;
2271 }
2272
2273 /* send an mldpv2 report  */
2274 static void
2275 ip6_neighbor_send_mldpv2_report (u32 sw_if_index)
2276 {
2277   vnet_main_t *vnm = vnet_get_main ();
2278   vlib_main_t *vm = vnm->vlib_main;
2279   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2280   vnet_sw_interface_t *sw_if0;
2281   ethernet_interface_t *eth_if0;
2282   u32 ri;
2283   int bogus_length;
2284
2285   ip6_radv_t *radv_info;
2286   u16 payload_length;
2287   vlib_buffer_t *b0;
2288   ip6_header_t *ip0;
2289   u32 *to_next;
2290   vlib_frame_t *f;
2291   u32 bo0;
2292   u32 n_to_alloc = 1;
2293   u32 n_allocated;
2294
2295   icmp6_multicast_listener_report_header_t *rh0;
2296   icmp6_multicast_listener_report_packet_t *rp0;
2297
2298   sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2299   ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
2300   eth_if0 = ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
2301
2302   if (!eth_if0 || !vnet_sw_interface_is_admin_up (vnm, sw_if_index))
2303     return;
2304
2305   /* look up the radv_t  information for this interface */
2306   vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2307                            ~0);
2308
2309   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2310
2311   if (ri == ~0)
2312     return;
2313
2314   /* send report now - build a mldpv2 report packet  */
2315   n_allocated = vlib_buffer_alloc_from_free_list (vm,
2316                                                   &bo0,
2317                                                   n_to_alloc,
2318                                                   VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2319   if (PREDICT_FALSE (n_allocated == 0))
2320     {
2321       clib_warning ("buffer allocation failure");
2322       return;
2323     }
2324
2325   b0 = vlib_get_buffer (vm, bo0);
2326
2327   /* adjust the sizeof the buffer to just include the ipv6 header */
2328   b0->current_length = sizeof (icmp6_multicast_listener_report_packet_t);
2329
2330   payload_length = sizeof (icmp6_multicast_listener_report_header_t);
2331
2332   b0->error = ICMP6_ERROR_NONE;
2333
2334   rp0 = vlib_buffer_get_current (b0);
2335   ip0 = (ip6_header_t *) & rp0->ip;
2336   rh0 = (icmp6_multicast_listener_report_header_t *) & rp0->report_hdr;
2337
2338   memset (rp0, 0x0, sizeof (icmp6_multicast_listener_report_packet_t));
2339
2340   ip0->ip_version_traffic_class_and_flow_label =
2341     clib_host_to_net_u32 (0x6 << 28);
2342
2343   ip0->protocol = IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS;
2344   /* for DEBUG - vnet driver won't seem to emit router alerts */
2345   /* ip0->protocol = IP_PROTOCOL_ICMP6; */
2346   ip0->hop_limit = 1;
2347
2348   rh0->icmp.type = ICMP6_multicast_listener_report_v2;
2349
2350   /* source address MUST be the link-local address */
2351   radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2352   ip0->src_address = radv_info->link_local_address;
2353
2354   /* destination is all mldpv2 routers */
2355   ip6_set_reserved_multicast_address (&ip0->dst_address,
2356                                       IP6_MULTICAST_SCOPE_link_local,
2357                                       IP6_MULTICAST_GROUP_ID_mldv2_routers);
2358
2359   /* add reports here */
2360   ip6_mldp_group_t *m;
2361   int num_addr_records = 0;
2362   icmp6_multicast_address_record_t rr;
2363
2364   /* fill in the hop-by-hop extension header (router alert) info */
2365   rh0->ext_hdr.next_hdr = IP_PROTOCOL_ICMP6;
2366   rh0->ext_hdr.n_data_u64s = 0;
2367
2368   rh0->alert.type = IP6_MLDP_ALERT_TYPE;
2369   rh0->alert.len = 2;
2370   rh0->alert.value = 0;
2371
2372   rh0->pad.type = 1;
2373   rh0->pad.len = 0;
2374
2375   rh0->icmp.checksum = 0;
2376
2377   /* *INDENT-OFF* */
2378   pool_foreach (m, radv_info->mldp_group_pool,
2379   ({
2380     rr.type = m->type;
2381     rr.aux_data_len_u32s = 0;
2382     rr.num_sources = clib_host_to_net_u16 (m->num_sources);
2383     clib_memcpy(&rr.mcast_addr, &m->mcast_address, sizeof(ip6_address_t));
2384
2385     num_addr_records++;
2386
2387     vlib_buffer_add_data
2388       (vm, vlib_buffer_get_free_list_index (b0), bo0,
2389        (void *)&rr, sizeof(icmp6_multicast_address_record_t));
2390
2391     payload_length += sizeof( icmp6_multicast_address_record_t);
2392   }));
2393   /* *INDENT-ON* */
2394
2395   rh0->rsvd = 0;
2396   rh0->num_addr_records = clib_host_to_net_u16 (num_addr_records);
2397
2398   /* update lengths */
2399   ip0->payload_length = clib_host_to_net_u16 (payload_length);
2400
2401   rh0->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0,
2402                                                           &bogus_length);
2403   ASSERT (bogus_length == 0);
2404
2405   /*
2406    * OK to override w/ no regard for actual FIB, because
2407    * ip6-rewrite only looks at the adjacency.
2408    */
2409   vnet_buffer (b0)->sw_if_index[VLIB_RX] =
2410     vnet_main.local_interface_sw_if_index;
2411
2412   vnet_buffer (b0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
2413   b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
2414
2415   vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite-mcast");
2416
2417   f = vlib_get_frame_to_node (vm, node->index);
2418   to_next = vlib_frame_vector_args (f);
2419   to_next[0] = bo0;
2420   f->n_vectors = 1;
2421
2422   vlib_put_frame_to_node (vm, node->index, f);
2423   return;
2424 }
2425
2426 /* *INDENT-OFF* */
2427 VLIB_REGISTER_NODE (ip6_icmp_router_solicitation_node,static) =
2428 {
2429   .function = icmp6_router_solicitation,
2430   .name = "icmp6-router-solicitation",
2431
2432   .vector_size = sizeof (u32),
2433
2434   .format_trace = format_icmp6_input_trace,
2435
2436   .n_next_nodes = ICMP6_ROUTER_SOLICITATION_N_NEXT,
2437   .next_nodes = {
2438     [ICMP6_ROUTER_SOLICITATION_NEXT_DROP] = "ip6-drop",
2439     [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW] = "ip6-rewrite-mcast",
2440     [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX] = "interface-output",
2441   },
2442 };
2443 /* *INDENT-ON* */
2444
2445 /* send a RA or update the timer info etc.. */
2446 static uword
2447 ip6_neighbor_process_timer_event (vlib_main_t * vm,
2448                                   vlib_node_runtime_t * node,
2449                                   vlib_frame_t * frame)
2450 {
2451   vnet_main_t *vnm = vnet_get_main ();
2452   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2453   ip6_radv_t *radv_info;
2454   vlib_frame_t *f = 0;
2455   u32 n_this_frame = 0;
2456   u32 n_left_to_next = 0;
2457   u32 *to_next = 0;
2458   u32 bo0;
2459   icmp6_router_solicitation_header_t *h0;
2460   vlib_buffer_t *b0;
2461   f64 now = vlib_time_now (vm);
2462
2463   /* Interface ip6 radv info list */
2464   /* *INDENT-OFF* */
2465   pool_foreach (radv_info, nm->if_radv_pool,
2466   ({
2467     if( !vnet_sw_interface_is_admin_up (vnm, radv_info->sw_if_index))
2468       {
2469         radv_info->initial_adverts_sent = radv_info->initial_adverts_count-1;
2470         radv_info->next_multicast_time = now;
2471         radv_info->last_multicast_time = now;
2472         radv_info->last_radv_time = 0;
2473         radv_info->all_routers_mcast = 0;
2474         continue;
2475       }
2476
2477     /* Make sure that we've joined the all-routers multicast group */
2478     if(!radv_info->all_routers_mcast)
2479       {
2480         /* send MDLP_REPORT_EVENT message */
2481         ip6_neighbor_send_mldpv2_report(radv_info->sw_if_index);
2482         radv_info->all_routers_mcast = 1;
2483       }
2484
2485     /* is it time to send a multicast  RA on this interface? */
2486     if(radv_info->send_radv && (now >=  radv_info->next_multicast_time))
2487       {
2488         u32 n_to_alloc = 1;
2489         u32 n_allocated;
2490
2491         f64 rfn = (radv_info->max_radv_interval - radv_info->min_radv_interval) *
2492           random_f64 (&radv_info->seed) + radv_info->min_radv_interval;
2493
2494         /* multicast send - compute next multicast send time */
2495         if( radv_info->initial_adverts_sent > 0)
2496           {
2497             radv_info->initial_adverts_sent--;
2498             if(rfn > radv_info-> initial_adverts_interval)
2499               rfn =  radv_info-> initial_adverts_interval;
2500
2501             /* check to see if we are ceasing to send */
2502             if( radv_info->initial_adverts_sent  == 0)
2503               if(radv_info->cease_radv)
2504                 radv_info->send_radv = 0;
2505           }
2506
2507         radv_info->next_multicast_time =  rfn + now;
2508         radv_info->last_multicast_time = now;
2509
2510         /* send advert now - build a "solicted" router advert with unspecified source address */
2511         n_allocated = vlib_buffer_alloc_from_free_list
2512           (vm, &bo0, n_to_alloc, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2513
2514         if (PREDICT_FALSE(n_allocated == 0))
2515           {
2516             clib_warning ("buffer allocation failure");
2517             continue;
2518           }
2519         b0 = vlib_get_buffer (vm, bo0);
2520         b0->current_length = sizeof( icmp6_router_solicitation_header_t);
2521         b0->error = ICMP6_ERROR_NONE;
2522         vnet_buffer (b0)->sw_if_index[VLIB_RX] = radv_info->sw_if_index;
2523
2524         h0 =  vlib_buffer_get_current (b0);
2525
2526         memset (h0, 0, sizeof (icmp6_router_solicitation_header_t));
2527
2528         h0->ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2529         h0->ip.payload_length = clib_host_to_net_u16 (sizeof (icmp6_router_solicitation_header_t)
2530                                                       - STRUCT_OFFSET_OF (icmp6_router_solicitation_header_t, neighbor));
2531         h0->ip.protocol = IP_PROTOCOL_ICMP6;
2532         h0->ip.hop_limit = 255;
2533
2534         /* set src/dst address as "unspecified" this marks this packet as internally generated rather than recieved */
2535         h0->ip.src_address.as_u64[0] = 0;
2536         h0->ip.src_address.as_u64[1] = 0;
2537
2538         h0->ip.dst_address.as_u64[0] = 0;
2539         h0->ip.dst_address.as_u64[1] = 0;
2540
2541         h0->neighbor.icmp.type = ICMP6_router_solicitation;
2542
2543         if (PREDICT_FALSE(f == 0))
2544           {
2545             f = vlib_get_frame_to_node (vm, ip6_icmp_router_solicitation_node.index);
2546             to_next = vlib_frame_vector_args (f);
2547             n_left_to_next = VLIB_FRAME_SIZE;
2548             n_this_frame = 0;
2549           }
2550
2551         n_this_frame++;
2552         n_left_to_next--;
2553         to_next[0] = bo0;
2554         to_next += 1;
2555
2556         if (PREDICT_FALSE(n_left_to_next == 0))
2557           {
2558             f->n_vectors = n_this_frame;
2559             vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2560             f = 0;
2561           }
2562       }
2563   }));
2564   /* *INDENT-ON* */
2565
2566   if (f)
2567     {
2568       ASSERT (n_this_frame);
2569       f->n_vectors = n_this_frame;
2570       vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2571     }
2572   return 0;
2573 }
2574
2575 static uword
2576 ip6_icmp_neighbor_discovery_event_process (vlib_main_t * vm,
2577                                            vlib_node_runtime_t * node,
2578                                            vlib_frame_t * frame)
2579 {
2580   uword event_type;
2581   ip6_icmp_neighbor_discovery_event_data_t *event_data;
2582
2583   /* init code here */
2584
2585   while (1)
2586     {
2587       vlib_process_wait_for_event_or_clock (vm, 1. /* seconds */ );
2588
2589       event_data = vlib_process_get_event_data (vm, &event_type);
2590
2591       if (!event_data)
2592         {
2593           /* No events found: timer expired. */
2594           /* process interface list and send RAs as appropriate, update timer info */
2595           ip6_neighbor_process_timer_event (vm, node, frame);
2596         }
2597       else
2598         {
2599           switch (event_type)
2600             {
2601
2602             case ICMP6_ND_EVENT_INIT:
2603               break;
2604
2605             case ~0:
2606               break;
2607
2608             default:
2609               ASSERT (0);
2610             }
2611
2612           if (event_data)
2613             _vec_len (event_data) = 0;
2614         }
2615     }
2616   return frame->n_vectors;
2617 }
2618
2619 /* *INDENT-OFF* */
2620 VLIB_REGISTER_NODE (ip6_icmp_router_advertisement_node,static) =
2621 {
2622   .function = icmp6_router_advertisement,
2623   .name = "icmp6-router-advertisement",
2624
2625   .vector_size = sizeof (u32),
2626
2627   .format_trace = format_icmp6_input_trace,
2628
2629   .n_next_nodes = 1,
2630   .next_nodes = {
2631     [0] = "ip6-drop",
2632   },
2633 };
2634 /* *INDENT-ON* */
2635
2636 vlib_node_registration_t ip6_icmp_neighbor_discovery_event_node = {
2637
2638   .function = ip6_icmp_neighbor_discovery_event_process,
2639   .name = "ip6-icmp-neighbor-discovery-event-process",
2640   .type = VLIB_NODE_TYPE_PROCESS,
2641 };
2642
2643 static uword
2644 icmp6_neighbor_solicitation (vlib_main_t * vm,
2645                              vlib_node_runtime_t * node, vlib_frame_t * frame)
2646 {
2647   return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
2648                                                        /* is_solicitation */
2649                                                        1);
2650 }
2651
2652 static uword
2653 icmp6_neighbor_advertisement (vlib_main_t * vm,
2654                               vlib_node_runtime_t * node,
2655                               vlib_frame_t * frame)
2656 {
2657   return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
2658                                                        /* is_solicitation */
2659                                                        0);
2660 }
2661
2662 /* *INDENT-OFF* */
2663 VLIB_REGISTER_NODE (ip6_icmp_neighbor_solicitation_node,static) =
2664 {
2665   .function = icmp6_neighbor_solicitation,
2666   .name = "icmp6-neighbor-solicitation",
2667
2668   .vector_size = sizeof (u32),
2669
2670   .format_trace = format_icmp6_input_trace,
2671
2672   .n_next_nodes = ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
2673   .next_nodes = {
2674     [ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP] = "ip6-drop",
2675     [ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY] = "interface-output",
2676   },
2677 };
2678 /* *INDENT-ON* */
2679
2680 /* *INDENT-OFF* */
2681 VLIB_REGISTER_NODE (ip6_icmp_neighbor_advertisement_node,static) =
2682 {
2683   .function = icmp6_neighbor_advertisement,
2684   .name = "icmp6-neighbor-advertisement",
2685
2686   .vector_size = sizeof (u32),
2687
2688   .format_trace = format_icmp6_input_trace,
2689
2690   .n_next_nodes = 1,
2691   .next_nodes = {
2692     [0] = "ip6-drop",
2693   },
2694 };
2695 /* *INDENT-ON* */
2696
2697 /* API support functions */
2698 int
2699 ip6_neighbor_ra_config (vlib_main_t * vm, u32 sw_if_index,
2700                         u8 suppress, u8 managed, u8 other,
2701                         u8 ll_option, u8 send_unicast, u8 cease,
2702                         u8 use_lifetime, u32 lifetime,
2703                         u32 initial_count, u32 initial_interval,
2704                         u32 max_interval, u32 min_interval, u8 is_no)
2705 {
2706   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2707   int error;
2708   u32 ri;
2709
2710   /* look up the radv_t  information for this interface */
2711   vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2712                            ~0);
2713   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2714   error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
2715
2716   if (!error)
2717     {
2718
2719       ip6_radv_t *radv_info;
2720       radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2721
2722       if ((max_interval != 0) && (min_interval == 0))
2723         min_interval = .75 * max_interval;
2724
2725       max_interval =
2726         (max_interval !=
2727          0) ? ((is_no) ? DEF_MAX_RADV_INTERVAL : max_interval) :
2728         radv_info->max_radv_interval;
2729       min_interval =
2730         (min_interval !=
2731          0) ? ((is_no) ? DEF_MIN_RADV_INTERVAL : min_interval) :
2732         radv_info->min_radv_interval;
2733       lifetime =
2734         (use_lifetime !=
2735          0) ? ((is_no) ? DEF_DEF_RTR_LIFETIME : lifetime) :
2736         radv_info->adv_router_lifetime_in_sec;
2737
2738       if (lifetime)
2739         {
2740           if (lifetime > MAX_DEF_RTR_LIFETIME)
2741             lifetime = MAX_DEF_RTR_LIFETIME;
2742
2743           if (lifetime <= max_interval)
2744             return VNET_API_ERROR_INVALID_VALUE;
2745         }
2746
2747       if (min_interval != 0)
2748         {
2749           if ((min_interval > .75 * max_interval) || (min_interval < 3))
2750             return VNET_API_ERROR_INVALID_VALUE;
2751         }
2752
2753       if ((initial_count > MAX_INITIAL_RTR_ADVERTISEMENTS) ||
2754           (initial_interval > MAX_INITIAL_RTR_ADVERT_INTERVAL))
2755         return VNET_API_ERROR_INVALID_VALUE;
2756
2757       /*
2758          if "flag" is set and is_no is true then restore default value else set value corresponding to "flag"
2759          if "flag" is clear  don't change corresponding value
2760        */
2761       radv_info->send_radv =
2762         (suppress != 0) ? ((is_no != 0) ? 1 : 0) : radv_info->send_radv;
2763       radv_info->adv_managed_flag =
2764         (managed != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_managed_flag;
2765       radv_info->adv_other_flag =
2766         (other != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_other_flag;
2767       radv_info->adv_link_layer_address =
2768         (ll_option !=
2769          0) ? ((is_no) ? 1 : 0) : radv_info->adv_link_layer_address;
2770       radv_info->send_unicast =
2771         (send_unicast != 0) ? ((is_no) ? 0 : 1) : radv_info->send_unicast;
2772       radv_info->cease_radv =
2773         (cease != 0) ? ((is_no) ? 0 : 1) : radv_info->cease_radv;
2774
2775       radv_info->min_radv_interval = min_interval;
2776       radv_info->max_radv_interval = max_interval;
2777       radv_info->adv_router_lifetime_in_sec = lifetime;
2778
2779       radv_info->initial_adverts_count =
2780         (initial_count !=
2781          0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERTISEMENTS : initial_count) :
2782         radv_info->initial_adverts_count;
2783       radv_info->initial_adverts_interval =
2784         (initial_interval !=
2785          0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERT_INTERVAL : initial_interval) :
2786         radv_info->initial_adverts_interval;
2787
2788       /* restart */
2789       if ((cease != 0) && (is_no))
2790         radv_info->send_radv = 1;
2791
2792       radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
2793       radv_info->next_multicast_time = vlib_time_now (vm);
2794       radv_info->last_multicast_time = vlib_time_now (vm);
2795       radv_info->last_radv_time = 0;
2796     }
2797   return (error);
2798 }
2799
2800 int
2801 ip6_neighbor_ra_prefix (vlib_main_t * vm, u32 sw_if_index,
2802                         ip6_address_t * prefix_addr, u8 prefix_len,
2803                         u8 use_default, u32 val_lifetime, u32 pref_lifetime,
2804                         u8 no_advertise, u8 off_link, u8 no_autoconfig,
2805                         u8 no_onlink, u8 is_no)
2806 {
2807   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2808   int error;
2809
2810   u32 ri;
2811
2812   /* look up the radv_t  information for this interface */
2813   vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2814                            ~0);
2815
2816   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2817
2818   error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
2819
2820   if (!error)
2821     {
2822       f64 now = vlib_time_now (vm);
2823       ip6_radv_t *radv_info;
2824       radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2825
2826       /* prefix info add, delete or update */
2827       ip6_radv_prefix_t *prefix;
2828
2829       /* lookup  prefix info for this  address on this interface */
2830       uword *p = mhash_get (&radv_info->address_to_prefix_index, prefix_addr);
2831
2832       prefix = p ? pool_elt_at_index (radv_info->adv_prefixes_pool, p[0]) : 0;
2833
2834       if (is_no)
2835         {
2836           /* delete */
2837           if (!prefix)
2838             return VNET_API_ERROR_INVALID_VALUE;        /* invalid prefix */
2839
2840           if (prefix->prefix_len != prefix_len)
2841             return VNET_API_ERROR_INVALID_VALUE_2;
2842
2843           /* FIXME - Should the DP do this or the CP ? */
2844           /* do specific delete processing here before returning */
2845           /* try to remove from routing table */
2846
2847           mhash_unset (&radv_info->address_to_prefix_index, prefix_addr,
2848                        /* old_value */ 0);
2849           pool_put (radv_info->adv_prefixes_pool, prefix);
2850
2851           radv_info->initial_adverts_sent =
2852             radv_info->initial_adverts_count - 1;
2853           radv_info->next_multicast_time = vlib_time_now (vm);
2854           radv_info->last_multicast_time = vlib_time_now (vm);
2855           radv_info->last_radv_time = 0;
2856           return (error);
2857         }
2858
2859       /* adding or changing */
2860       if (!prefix)
2861         {
2862           /* add */
2863           u32 pi;
2864           pool_get (radv_info->adv_prefixes_pool, prefix);
2865           pi = prefix - radv_info->adv_prefixes_pool;
2866           mhash_set (&radv_info->address_to_prefix_index, prefix_addr, pi,
2867                      /* old_value */ 0);
2868
2869           memset (prefix, 0x0, sizeof (ip6_radv_prefix_t));
2870
2871           prefix->prefix_len = prefix_len;
2872           clib_memcpy (&prefix->prefix, prefix_addr, sizeof (ip6_address_t));
2873
2874           /* initialize default values */
2875           prefix->adv_on_link_flag = 1; /* L bit set */
2876           prefix->adv_autonomous_flag = 1;      /* A bit set */
2877           prefix->adv_valid_lifetime_in_secs = DEF_ADV_VALID_LIFETIME;
2878           prefix->adv_pref_lifetime_in_secs = DEF_ADV_PREF_LIFETIME;
2879           prefix->enabled = 1;
2880           prefix->decrement_lifetime_flag = 1;
2881           prefix->deprecated_prefix_flag = 1;
2882
2883           if (off_link == 0)
2884             {
2885               /* FIXME - Should the DP do this or the CP ? */
2886               /* insert prefix into routing table as a connected prefix */
2887             }
2888
2889           if (use_default)
2890             goto restart;
2891         }
2892       else
2893         {
2894
2895           if (prefix->prefix_len != prefix_len)
2896             return VNET_API_ERROR_INVALID_VALUE_2;
2897
2898           if (off_link != 0)
2899             {
2900               /* FIXME - Should the DP do this or the CP ? */
2901               /* remove from routing table if already there */
2902             }
2903         }
2904
2905       if ((val_lifetime == ~0) || (pref_lifetime == ~0))
2906         {
2907           prefix->adv_valid_lifetime_in_secs = ~0;
2908           prefix->adv_pref_lifetime_in_secs = ~0;
2909           prefix->decrement_lifetime_flag = 0;
2910         }
2911       else
2912         {
2913           prefix->adv_valid_lifetime_in_secs = val_lifetime;;
2914           prefix->adv_pref_lifetime_in_secs = pref_lifetime;
2915         }
2916
2917       /* copy  remaining */
2918       prefix->enabled = !(no_advertise != 0);
2919       prefix->adv_on_link_flag = !((off_link != 0) || (no_onlink != 0));
2920       prefix->adv_autonomous_flag = !(no_autoconfig != 0);
2921
2922     restart:
2923       /* restart */
2924       /* fill in the expiration times  */
2925       prefix->valid_lifetime_expires =
2926         now + prefix->adv_valid_lifetime_in_secs;
2927       prefix->pref_lifetime_expires = now + prefix->adv_pref_lifetime_in_secs;
2928
2929       radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
2930       radv_info->next_multicast_time = vlib_time_now (vm);
2931       radv_info->last_multicast_time = vlib_time_now (vm);
2932       radv_info->last_radv_time = 0;
2933     }
2934   return (error);
2935 }
2936
2937 clib_error_t *
2938 ip6_neighbor_cmd (vlib_main_t * vm, unformat_input_t * main_input,
2939                   vlib_cli_command_t * cmd)
2940 {
2941   vnet_main_t *vnm = vnet_get_main ();
2942   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2943   clib_error_t *error = 0;
2944   u8 is_no = 0;
2945   u8 suppress = 0, managed = 0, other = 0;
2946   u8 suppress_ll_option = 0, send_unicast = 0, cease = 0;
2947   u8 use_lifetime = 0;
2948   u32 sw_if_index, ra_lifetime = 0, ra_initial_count =
2949     0, ra_initial_interval = 0;
2950   u32 ra_max_interval = 0, ra_min_interval = 0;
2951
2952   unformat_input_t _line_input, *line_input = &_line_input;
2953   vnet_sw_interface_t *sw_if0;
2954
2955   int add_radv_info = 1;
2956   __attribute__ ((unused)) ip6_radv_t *radv_info = 0;
2957   ip6_address_t ip6_addr;
2958   u32 addr_len;
2959
2960
2961   /* Get a line of input. */
2962   if (!unformat_user (main_input, unformat_line_input, line_input))
2963     return 0;
2964
2965   /* get basic radv info for this interface */
2966   if (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2967     {
2968
2969       if (unformat_user (line_input,
2970                          unformat_vnet_sw_interface, vnm, &sw_if_index))
2971         {
2972           u32 ri;
2973           ethernet_interface_t *eth_if0 = 0;
2974
2975           sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2976           if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2977             eth_if0 =
2978               ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
2979
2980           if (!eth_if0)
2981             {
2982               error =
2983                 clib_error_return (0, "Interface must be of ethernet type");
2984               goto done;
2985             }
2986
2987           /* look up the radv_t  information for this interface */
2988           vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
2989                                    sw_if_index, ~0);
2990
2991           ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2992
2993           if (ri != ~0)
2994             {
2995               radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2996             }
2997           else
2998             {
2999               error = clib_error_return (0, "unknown interface %U'",
3000                                          format_unformat_error, line_input);
3001               goto done;
3002             }
3003         }
3004       else
3005         {
3006           error = clib_error_return (0, "invalid interface name %U'",
3007                                      format_unformat_error, line_input);
3008           goto done;
3009         }
3010     }
3011
3012   /* get the rest of the command */
3013   while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3014     {
3015       if (unformat (line_input, "no"))
3016         is_no = 1;
3017       else if (unformat (line_input, "prefix %U/%d",
3018                          unformat_ip6_address, &ip6_addr, &addr_len))
3019         {
3020           add_radv_info = 0;
3021           break;
3022         }
3023       else if (unformat (line_input, "ra-managed-config-flag"))
3024         {
3025           managed = 1;
3026           break;
3027         }
3028       else if (unformat (line_input, "ra-other-config-flag"))
3029         {
3030           other = 1;
3031           break;
3032         }
3033       else if (unformat (line_input, "ra-suppress") ||
3034                unformat (line_input, "ra-surpress"))
3035         {
3036           suppress = 1;
3037           break;
3038         }
3039       else if (unformat (line_input, "ra-suppress-link-layer") ||
3040                unformat (line_input, "ra-surpress-link-layer"))
3041         {
3042           suppress_ll_option = 1;
3043           break;
3044         }
3045       else if (unformat (line_input, "ra-send-unicast"))
3046         {
3047           send_unicast = 1;
3048           break;
3049         }
3050       else if (unformat (line_input, "ra-lifetime"))
3051         {
3052           if (!unformat (line_input, "%d", &ra_lifetime))
3053             {
3054               error = unformat_parse_error (line_input);
3055               goto done;
3056             }
3057           use_lifetime = 1;
3058           break;
3059         }
3060       else if (unformat (line_input, "ra-initial"))
3061         {
3062           if (!unformat
3063               (line_input, "%d %d", &ra_initial_count, &ra_initial_interval))
3064             {
3065               error = unformat_parse_error (line_input);
3066               goto done;
3067             }
3068           break;
3069         }
3070       else if (unformat (line_input, "ra-interval"))
3071         {
3072           if (!unformat (line_input, "%d", &ra_max_interval))
3073             {
3074               error = unformat_parse_error (line_input);
3075               goto done;
3076             }
3077
3078           if (!unformat (line_input, "%d", &ra_min_interval))
3079             ra_min_interval = 0;
3080           break;
3081         }
3082       else if (unformat (line_input, "ra-cease"))
3083         {
3084           cease = 1;
3085           break;
3086         }
3087       else
3088         {
3089           error = unformat_parse_error (line_input);
3090           goto done;
3091         }
3092     }
3093
3094   if (add_radv_info)
3095     {
3096       ip6_neighbor_ra_config (vm, sw_if_index,
3097                               suppress, managed, other,
3098                               suppress_ll_option, send_unicast, cease,
3099                               use_lifetime, ra_lifetime,
3100                               ra_initial_count, ra_initial_interval,
3101                               ra_max_interval, ra_min_interval, is_no);
3102     }
3103   else
3104     {
3105       u32 valid_lifetime_in_secs = 0;
3106       u32 pref_lifetime_in_secs = 0;
3107       u8 use_prefix_default_values = 0;
3108       u8 no_advertise = 0;
3109       u8 off_link = 0;
3110       u8 no_autoconfig = 0;
3111       u8 no_onlink = 0;
3112
3113       /* get the rest of the command */
3114       while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3115         {
3116           if (unformat (line_input, "default"))
3117             {
3118               use_prefix_default_values = 1;
3119               break;
3120             }
3121           else if (unformat (line_input, "infinite"))
3122             {
3123               valid_lifetime_in_secs = ~0;
3124               pref_lifetime_in_secs = ~0;
3125               break;
3126             }
3127           else if (unformat (line_input, "%d %d", &valid_lifetime_in_secs,
3128                              &pref_lifetime_in_secs))
3129             break;
3130           else
3131             break;
3132         }
3133
3134
3135       /* get the rest of the command */
3136       while (!use_prefix_default_values &&
3137              unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3138         {
3139           if (unformat (line_input, "no-advertise"))
3140             no_advertise = 1;
3141           else if (unformat (line_input, "off-link"))
3142             off_link = 1;
3143           else if (unformat (line_input, "no-autoconfig"))
3144             no_autoconfig = 1;
3145           else if (unformat (line_input, "no-onlink"))
3146             no_onlink = 1;
3147           else
3148             {
3149               error = unformat_parse_error (line_input);
3150               goto done;
3151             }
3152         }
3153
3154       ip6_neighbor_ra_prefix (vm, sw_if_index,
3155                               &ip6_addr, addr_len,
3156                               use_prefix_default_values,
3157                               valid_lifetime_in_secs,
3158                               pref_lifetime_in_secs,
3159                               no_advertise,
3160                               off_link, no_autoconfig, no_onlink, is_no);
3161     }
3162
3163 done:
3164   unformat_free (line_input);
3165
3166   return error;
3167 }
3168
3169 static void
3170 ip6_print_addrs (vlib_main_t * vm, u32 * addrs)
3171 {
3172   ip_lookup_main_t *lm = &ip6_main.lookup_main;
3173   u32 i;
3174
3175   for (i = 0; i < vec_len (addrs); i++)
3176     {
3177       ip_interface_address_t *a =
3178         pool_elt_at_index (lm->if_address_pool, addrs[i]);
3179       ip6_address_t *address = ip_interface_address_get_address (lm, a);
3180
3181       vlib_cli_output (vm, "\t\t%U/%d",
3182                        format_ip6_address, address, a->address_length);
3183     }
3184 }
3185
3186 static clib_error_t *
3187 show_ip6_interface_cmd (vlib_main_t * vm,
3188                         unformat_input_t * input, vlib_cli_command_t * cmd)
3189 {
3190   vnet_main_t *vnm = vnet_get_main ();
3191   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3192   clib_error_t *error = 0;
3193   u32 sw_if_index;
3194
3195   sw_if_index = ~0;
3196
3197   if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3198     {
3199       u32 ri;
3200
3201       /* look up the radv_t  information for this interface */
3202       vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3203                                sw_if_index, ~0);
3204
3205       ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3206
3207       if (ri != ~0)
3208         {
3209           ip_lookup_main_t *lm = &ip6_main.lookup_main;
3210           ip6_radv_t *radv_info;
3211           radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3212
3213           vlib_cli_output (vm, "%U is admin %s\n",
3214                            format_vnet_sw_interface_name, vnm,
3215                            vnet_get_sw_interface (vnm, sw_if_index),
3216                            (vnet_sw_interface_is_admin_up (vnm, sw_if_index) ?
3217                             "up" : "down"));
3218
3219           u32 ai;
3220           u32 *link_scope = 0, *global_scope = 0;
3221           u32 *local_scope = 0, *unknown_scope = 0;
3222           ip_interface_address_t *a;
3223
3224           vec_validate_init_empty (lm->if_address_pool_index_by_sw_if_index,
3225                                    sw_if_index, ~0);
3226           ai = lm->if_address_pool_index_by_sw_if_index[sw_if_index];
3227
3228           while (ai != (u32) ~ 0)
3229             {
3230               a = pool_elt_at_index (lm->if_address_pool, ai);
3231               ip6_address_t *address =
3232                 ip_interface_address_get_address (lm, a);
3233
3234               if (ip6_address_is_link_local_unicast (address))
3235                 vec_add1 (link_scope, ai);
3236               else if (ip6_address_is_global_unicast (address))
3237                 vec_add1 (global_scope, ai);
3238               else if (ip6_address_is_local_unicast (address))
3239                 vec_add1 (local_scope, ai);
3240               else
3241                 vec_add1 (unknown_scope, ai);
3242
3243               ai = a->next_this_sw_interface;
3244             }
3245
3246           if (vec_len (link_scope))
3247             {
3248               vlib_cli_output (vm, "\tLink-local address(es):\n");
3249               ip6_print_addrs (vm, link_scope);
3250               vec_free (link_scope);
3251             }
3252
3253           if (vec_len (local_scope))
3254             {
3255               vlib_cli_output (vm, "\tLocal unicast address(es):\n");
3256               ip6_print_addrs (vm, local_scope);
3257               vec_free (local_scope);
3258             }
3259
3260           if (vec_len (global_scope))
3261             {
3262               vlib_cli_output (vm, "\tGlobal unicast address(es):\n");
3263               ip6_print_addrs (vm, global_scope);
3264               vec_free (global_scope);
3265             }
3266
3267           if (vec_len (unknown_scope))
3268             {
3269               vlib_cli_output (vm, "\tOther-scope address(es):\n");
3270               ip6_print_addrs (vm, unknown_scope);
3271               vec_free (unknown_scope);
3272             }
3273
3274           vlib_cli_output (vm, "\tJoined group address(es):\n");
3275           ip6_mldp_group_t *m;
3276           /* *INDENT-OFF* */
3277           pool_foreach (m, radv_info->mldp_group_pool,
3278           ({
3279             vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
3280                              &m->mcast_address);
3281           }));
3282           /* *INDENT-ON* */
3283
3284           vlib_cli_output (vm, "\tAdvertised Prefixes:\n");
3285           ip6_radv_prefix_t *p;
3286           /* *INDENT-OFF* */
3287           pool_foreach (p, radv_info->adv_prefixes_pool,
3288           ({
3289             vlib_cli_output (vm, "\t\tprefix %U,  length %d\n",
3290                              format_ip6_address, &p->prefix, p->prefix_len);
3291           }));
3292           /* *INDENT-ON* */
3293
3294           vlib_cli_output (vm, "\tMTU is %d\n", radv_info->adv_link_mtu);
3295           vlib_cli_output (vm, "\tICMP error messages are unlimited\n");
3296           vlib_cli_output (vm, "\tICMP redirects are disabled\n");
3297           vlib_cli_output (vm, "\tICMP unreachables are not sent\n");
3298           vlib_cli_output (vm, "\tND DAD is disabled\n");
3299           //vlib_cli_output (vm, "\tND reachable time is %d milliseconds\n",);
3300           vlib_cli_output (vm, "\tND advertised reachable time is %d\n",
3301                            radv_info->adv_neighbor_reachable_time_in_msec);
3302           vlib_cli_output (vm,
3303                            "\tND advertised retransmit interval is %d (msec)\n",
3304                            radv_info->
3305                            adv_time_in_msec_between_retransmitted_neighbor_solicitations);
3306
3307           u32 ra_interval = radv_info->max_radv_interval;
3308           u32 ra_interval_min = radv_info->min_radv_interval;
3309           vlib_cli_output (vm,
3310                            "\tND router advertisements are sent every %d seconds (min interval is %d)\n",
3311                            ra_interval, ra_interval_min);
3312           vlib_cli_output (vm,
3313                            "\tND router advertisements live for %d seconds\n",
3314                            radv_info->adv_router_lifetime_in_sec);
3315           vlib_cli_output (vm,
3316                            "\tHosts %s stateless autoconfig for addresses\n",
3317                            (radv_info->adv_managed_flag) ? "use" :
3318                            " don't use");
3319           vlib_cli_output (vm, "\tND router advertisements sent %d\n",
3320                            radv_info->n_advertisements_sent);
3321           vlib_cli_output (vm, "\tND router solicitations received %d\n",
3322                            radv_info->n_solicitations_rcvd);
3323           vlib_cli_output (vm, "\tND router solicitations dropped %d\n",
3324                            radv_info->n_solicitations_dropped);
3325         }
3326       else
3327         {
3328           error = clib_error_return (0, "IPv6 not enabled on interface",
3329                                      format_unformat_error, input);
3330
3331         }
3332     }
3333   return error;
3334 }
3335
3336 /*?
3337  * This command is used to display various IPv6 attributes on a given
3338  * interface.
3339  *
3340  * @cliexpar
3341  * Example of how to display IPv6 settings:
3342  * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
3343  * GigabitEthernet2/0/0 is admin up
3344  *         Link-local address(es):
3345  *                 fe80::ab8/64
3346  *         Joined group address(es):
3347  *                 ff02::1
3348  *                 ff02::2
3349  *                 ff02::16
3350  *                 ff02::1:ff00:ab8
3351  *         Advertised Prefixes:
3352  *                 prefix fe80::fe:28ff:fe9c:75b3,  length 64
3353  *         MTU is 1500
3354  *         ICMP error messages are unlimited
3355  *         ICMP redirects are disabled
3356  *         ICMP unreachables are not sent
3357  *         ND DAD is disabled
3358  *         ND advertised reachable time is 0
3359  *         ND advertised retransmit interval is 0 (msec)
3360  *         ND router advertisements are sent every 200 seconds (min interval is 150)
3361  *         ND router advertisements live for 600 seconds
3362  *         Hosts use stateless autoconfig for addresses
3363  *         ND router advertisements sent 19336
3364  *         ND router solicitations received 0
3365  *         ND router solicitations dropped 0
3366  * @cliexend
3367  * Example of output if IPv6 is not enabled on the interface:
3368  * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
3369  * show ip6 interface: IPv6 not enabled on interface
3370  * @cliexend
3371 ?*/
3372 /* *INDENT-OFF* */
3373 VLIB_CLI_COMMAND (show_ip6_interface_command, static) =
3374 {
3375   .path = "show ip6 interface",
3376   .function = show_ip6_interface_cmd,
3377   .short_help = "show ip6 interface <interface>",
3378 };
3379 /* *INDENT-ON* */
3380
3381 clib_error_t *
3382 disable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
3383 {
3384   clib_error_t *error = 0;
3385   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3386   u32 ri;
3387
3388   /* look up the radv_t  information for this interface */
3389   vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3390                            ~0);
3391   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3392
3393   /* if not created - do nothing */
3394   if (ri != ~0)
3395     {
3396       vnet_main_t *vnm = vnet_get_main ();
3397       ip6_radv_t *radv_info;
3398
3399       radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3400
3401       /* check radv_info ref count for other ip6 addresses on this interface */
3402       /* This implicitly excludes the link local address */
3403       if (radv_info->ref_count == 0)
3404         {
3405           /* essentially "disables" ipv6 on this interface */
3406           error = ip6_add_del_interface_address (vm, sw_if_index,
3407                                                  &radv_info->
3408                                                  link_local_address, 128,
3409                                                  1 /* is_del */ );
3410
3411           ip6_neighbor_sw_interface_add_del (vnm, sw_if_index,
3412                                              0 /* is_add */ );
3413           ip6_mfib_interface_enable_disable (sw_if_index, 0);
3414         }
3415     }
3416   return error;
3417 }
3418
3419 int
3420 ip6_interface_enabled (vlib_main_t * vm, u32 sw_if_index)
3421 {
3422   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3423   u32 ri = ~0;
3424
3425   /* look up the radv_t  information for this interface */
3426   vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3427                            ~0);
3428
3429   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3430
3431   return ri != ~0;
3432 }
3433
3434 clib_error_t *
3435 enable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
3436 {
3437   clib_error_t *error = 0;
3438   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3439   u32 ri;
3440   int is_add = 1;
3441
3442   /* look up the radv_t  information for this interface */
3443   vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3444                            ~0);
3445
3446   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3447
3448   /* if not created yet */
3449   if (ri == ~0)
3450     {
3451       vnet_main_t *vnm = vnet_get_main ();
3452       vnet_sw_interface_t *sw_if0;
3453
3454       sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
3455       if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
3456         {
3457           ethernet_interface_t *eth_if0;
3458
3459           eth_if0 =
3460             ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
3461           if (eth_if0)
3462             {
3463               /* create radv_info. for this interface.  This holds all the info needed for router adverts */
3464               ri =
3465                 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, is_add);
3466
3467               if (ri != ~0)
3468                 {
3469                   ip6_radv_t *radv_info;
3470                   ip6_address_t link_local_address;
3471
3472                   radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3473
3474                   ip6_link_local_address_from_ethernet_mac_address
3475                     (&link_local_address, eth_if0->address);
3476
3477                   sw_if0 = vnet_get_sw_interface (vnm, sw_if_index);
3478                   if (sw_if0->type == VNET_SW_INTERFACE_TYPE_SUB ||
3479                       sw_if0->type == VNET_SW_INTERFACE_TYPE_P2P)
3480                     {
3481                       /* make up  an interface id */
3482                       md5_context_t m;
3483                       u8 digest[16];
3484
3485                       link_local_address.as_u64[0] = radv_info->randomizer;
3486
3487                       md5_init (&m);
3488                       md5_add (&m, &link_local_address, 16);
3489                       md5_finish (&m, digest);
3490
3491                       clib_memcpy (&link_local_address, digest, 16);
3492
3493                       radv_info->randomizer = link_local_address.as_u64[0];
3494
3495                       link_local_address.as_u64[0] =
3496                         clib_host_to_net_u64 (0xFE80000000000000ULL);
3497                       /* clear u bit */
3498                       link_local_address.as_u8[8] &= 0xfd;
3499                     }
3500
3501                   ip6_mfib_interface_enable_disable (sw_if_index, 1);
3502
3503                   /* essentially "enables" ipv6 on this interface */
3504                   error = ip6_add_del_interface_address (vm, sw_if_index,
3505                                                          &link_local_address,
3506                                                          128
3507                                                          /* address width */ ,
3508                                                          0 /* is_del */ );
3509
3510                   if (error)
3511                     ip6_neighbor_sw_interface_add_del (vnm, sw_if_index,
3512                                                        !is_add);
3513                   else
3514                     {
3515                       radv_info->link_local_address = link_local_address;
3516                     }
3517                 }
3518             }
3519         }
3520     }
3521   return error;
3522 }
3523
3524 static clib_error_t *
3525 enable_ip6_interface_cmd (vlib_main_t * vm,
3526                           unformat_input_t * input, vlib_cli_command_t * cmd)
3527 {
3528   vnet_main_t *vnm = vnet_get_main ();
3529   clib_error_t *error = 0;
3530   u32 sw_if_index;
3531
3532   sw_if_index = ~0;
3533
3534   if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3535     {
3536       enable_ip6_interface (vm, sw_if_index);
3537     }
3538   else
3539     {
3540       error = clib_error_return (0, "unknown interface\n'",
3541                                  format_unformat_error, input);
3542
3543     }
3544   return error;
3545 }
3546
3547 /*?
3548  * This command is used to enable IPv6 on a given interface.
3549  *
3550  * @cliexpar
3551  * Example of how enable IPv6 on a given interface:
3552  * @cliexcmd{enable ip6 interface GigabitEthernet2/0/0}
3553 ?*/
3554 /* *INDENT-OFF* */
3555 VLIB_CLI_COMMAND (enable_ip6_interface_command, static) =
3556 {
3557   .path = "enable ip6 interface",
3558   .function = enable_ip6_interface_cmd,
3559   .short_help = "enable ip6 interface <interface>",
3560 };
3561 /* *INDENT-ON* */
3562
3563 static clib_error_t *
3564 disable_ip6_interface_cmd (vlib_main_t * vm,
3565                            unformat_input_t * input, vlib_cli_command_t * cmd)
3566 {
3567   vnet_main_t *vnm = vnet_get_main ();
3568   clib_error_t *error = 0;
3569   u32 sw_if_index;
3570
3571   sw_if_index = ~0;
3572
3573   if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3574     {
3575       error = disable_ip6_interface (vm, sw_if_index);
3576     }
3577   else
3578     {
3579       error = clib_error_return (0, "unknown interface\n'",
3580                                  format_unformat_error, input);
3581
3582     }
3583   return error;
3584 }
3585
3586 /*?
3587  * This command is used to disable IPv6 on a given interface.
3588  *
3589  * @cliexpar
3590  * Example of how disable IPv6 on a given interface:
3591  * @cliexcmd{disable ip6 interface GigabitEthernet2/0/0}
3592 ?*/
3593 /* *INDENT-OFF* */
3594 VLIB_CLI_COMMAND (disable_ip6_interface_command, static) =
3595 {
3596   .path = "disable ip6 interface",
3597   .function = disable_ip6_interface_cmd,
3598   .short_help = "disable ip6 interface <interface>",
3599 };
3600 /* *INDENT-ON* */
3601
3602 /*?
3603  * This command is used to configure the neighbor discovery
3604  * parameters on a given interface. Use the '<em>show ip6 interface</em>'
3605  * command to display some of the current neighbor discovery parameters
3606  * on a given interface. This command has three formats:
3607  *
3608  *
3609  * <b>Format 1 - Router Advertisement Options:</b> (Only one can be entered in a single command)
3610  *
3611  * '<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>'
3612  *
3613  * Where:
3614  *
3615  * <em>[no] ra-managed-config-flag</em> - Advertises in ICMPv6
3616  * router-advertisement messages to use stateful address
3617  * auto-configuration to obtain address information (sets the M-bit).
3618  * Default is the M-bit is not set and the '<em>no</em>' option
3619  * returns it to this default state.
3620  *
3621  * <em>[no] ra-other-config-flag</em> - Indicates in ICMPv6
3622  * router-advertisement messages that hosts use stateful auto
3623  * configuration to obtain nonaddress related information (sets
3624  * the O-bit). Default is the O-bit is not set and the '<em>no</em>'
3625  * option returns it to this default state.
3626  *
3627  * <em>[no] ra-suppress</em> - Disables sending ICMPv6 router-advertisement
3628  * messages. The '<em>no</em>' option implies to enable sending ICMPv6
3629  * router-advertisement messages.
3630  *
3631  * <em>[no] ra-suppress-link-layer</em> - Indicates not to include the
3632  * optional source link-layer address in the ICMPv6 router-advertisement
3633  * messages. Default is to include the optional source link-layer address
3634  * and the '<em>no</em>' option returns it to this default state.
3635  *
3636  * <em>[no] ra-send-unicast</em> - Use the source address of the
3637  * router-solicitation message if availiable. The default is to use
3638  * multicast address of all nodes, and the '<em>no</em>' option returns
3639  * it to this default state.
3640  *
3641  * <em>[no] ra-lifetime <lifetime></em> - Advertises the lifetime of a
3642  * default router in ICMPv6 router-advertisement messages. The range is
3643  * from 0 to 9000 seconds. '<em><lifetime></em>' must be greater than
3644  * '<em><max-interval></em>'. The default value is 600 seconds and the
3645  * '<em>no</em>' option returns it to this default value.
3646  *
3647  * <em>[no] ra-initial <cnt> <interval></em> - Number of initial ICMPv6
3648  * router-advertisement messages sent and the interval between each
3649  * message. Range for count is 1 - 3 and default is 3. Range for interval
3650  * is 1 to 16 seconds, and default is 16 seconds. The '<em>no</em>' option
3651  * returns both to their default value.
3652  *
3653  * <em>[no] ra-interval <max-interval> [<min-interval>]</em> - Configures the
3654  * interval between sending ICMPv6 router-advertisement messages. The
3655  * range for max-interval is from 4 to 200 seconds. min-interval can not
3656  * be more than 75% of max-interval. If not set, min-interval will be
3657  * set to 75% of max-interval. The range for min-interval is from 3 to
3658  * 150 seconds.  The '<em>no</em>' option returns both to their default
3659  * value.
3660  *
3661  * <em>[no] ra-cease</em> - Cease sending ICMPv6 router-advertisement messages.
3662  * The '<em>no</em>' options implies to start (or restart) sending
3663  * ICMPv6 router-advertisement messages.
3664  *
3665  *
3666  * <b>Format 2 - Prefix Options:</b>
3667  *
3668  * '<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>'
3669  *
3670  * Where:
3671  *
3672  * <em>no</em> - All additional flags are ignored and the prefix is deleted.
3673  *
3674  * <em><valid-lifetime> <pref-lifetime></em> - '<em><valid-lifetime></em>' is the
3675  * length of time in seconds during what the prefix is valid for the purpose of
3676  * on-link determination. Range is 7203 to 2592000 seconds and default is 2592000
3677  * seconds (30 days). '<em><pref-lifetime></em>' is the prefered-lifetime and is the
3678  * length of time in seconds during what addresses generated from the prefix remain
3679  * preferred. Range is 0 to 604800 seconds and default is 604800 seconds (7 days).
3680  *
3681  * <em>infinite</em> - Both '<em><valid-lifetime></em>' and '<em><<pref-lifetime></em>'
3682  * are inifinte, no timeout.
3683  *
3684  * <em>no-advertise</em> - Do not send full router address in prefix
3685  * advertisement. Default is to advertise (i.e. - This flag is off by default).
3686  *
3687  * <em>off-link</em> - Prefix is off-link, clear L-bit in packet. Default is on-link
3688  * (i.e. - This flag is off and L-bit in packet is set by default and this prefix can
3689  * be used for on-link determination). '<em>no-onlink</em>' also controls the L-bit.
3690  *
3691  * <em>no-autoconfig</em> - Do not use prefix for autoconfiguration, clear A-bit in packet.
3692  * Default is autoconfig (i.e. - This flag is off and A-bit in packet is set by default.
3693  *
3694  * <em>no-onlink</em> - Do not use prefix for onlink determination, clear L-bit in packet.
3695  * Default is on-link (i.e. - This flag is off and L-bit in packet is set by default and
3696  * this prefix can be used for on-link determination). '<em>off-link</em>' also controls
3697  * the L-bit.
3698  *
3699  *
3700  * <b>Format 3: - Default of Prefix:</b>
3701  *
3702  * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> default</b></em>'
3703  *
3704  * When a new prefix is added (or existing one is being overwritten) <em>default</em>
3705  * uses default values for the prefix. If <em>no</em> is used, the <em>default</em>
3706  * is ignored and the prefix is deleted.
3707  *
3708  *
3709  * @cliexpar
3710  * Example of how set a router advertisement option:
3711  * @cliexcmd{ip6 nd GigabitEthernet2/0/0 ra-interval 100 20}
3712  * Example of how to add a prefix:
3713  * @cliexcmd{ip6 nd GigabitEthernet2/0/0 prefix fe80::fe:28ff:fe9c:75b3/64 infinite no-advertise}
3714  * Example of how to delete a prefix:
3715  * @cliexcmd{ip6 nd GigabitEthernet2/0/0 no prefix fe80::fe:28ff:fe9c:75b3/64}
3716 ?*/
3717 /* *INDENT-OFF* */
3718 VLIB_CLI_COMMAND (ip6_nd_command, static) =
3719 {
3720   .path = "ip6 nd",
3721   .short_help = "ip6 nd <interface> ...",
3722   .function = ip6_neighbor_cmd,
3723 };
3724 /* *INDENT-ON* */
3725
3726 clib_error_t *
3727 set_ip6_link_local_address (vlib_main_t * vm,
3728                             u32 sw_if_index, ip6_address_t * address)
3729 {
3730   clib_error_t *error = 0;
3731   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3732   u32 ri;
3733   ip6_radv_t *radv_info;
3734   vnet_main_t *vnm = vnet_get_main ();
3735
3736   if (!ip6_address_is_link_local_unicast (address))
3737     {
3738       vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_LINK_LOCAL;
3739       return (error = clib_error_return (0, "address not link-local",
3740                                          format_unformat_error));
3741     }
3742
3743   /* call enable ipv6  */
3744   enable_ip6_interface (vm, sw_if_index);
3745
3746   ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3747
3748   if (ri != ~0)
3749     {
3750       radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3751
3752       /* save if link local address (overwrite default) */
3753
3754       /* delete the old one */
3755       error = ip6_add_del_interface_address (vm, sw_if_index,
3756                                              &radv_info->link_local_address,
3757                                              128, 1 /* is_del */ );
3758
3759       if (!error)
3760         {
3761           /* add the new one */
3762           error = ip6_add_del_interface_address (vm, sw_if_index,
3763                                                  address, 128,
3764                                                  0 /* is_del */ );
3765
3766           if (!error)
3767             {
3768               radv_info->link_local_address = *address;
3769             }
3770         }
3771     }
3772   else
3773     {
3774       vnm->api_errno = VNET_API_ERROR_IP6_NOT_ENABLED;
3775       error = clib_error_return (0, "ip6 not enabled for interface",
3776                                  format_unformat_error);
3777     }
3778   return error;
3779 }
3780
3781 clib_error_t *
3782 set_ip6_link_local_address_cmd (vlib_main_t * vm,
3783                                 unformat_input_t * input,
3784                                 vlib_cli_command_t * cmd)
3785 {
3786   vnet_main_t *vnm = vnet_get_main ();
3787   clib_error_t *error = 0;
3788   u32 sw_if_index;
3789   ip6_address_t ip6_addr;
3790
3791   if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3792     {
3793       /* get the rest of the command */
3794       while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3795         {
3796           if (unformat (input, "%U", unformat_ip6_address, &ip6_addr))
3797             break;
3798           else
3799             return (unformat_parse_error (input));
3800         }
3801     }
3802   error = set_ip6_link_local_address (vm, sw_if_index, &ip6_addr);
3803   return error;
3804 }
3805
3806 /*?
3807  * This command is used to assign an IPv6 Link-local address to an
3808  * interface. This command will enable IPv6 on an interface if it
3809  * is not already enabled. Use the '<em>show ip6 interface</em>' command
3810  * to display the assigned Link-local address.
3811  *
3812  * @cliexpar
3813  * Example of how to assign an IPv6 Link-local address to an interface:
3814  * @cliexcmd{set ip6 link-local address GigabitEthernet2/0/0 FE80::AB8}
3815 ?*/
3816 /* *INDENT-OFF* */
3817 VLIB_CLI_COMMAND (set_ip6_link_local_address_command, static) =
3818 {
3819   .path = "set ip6 link-local address",
3820   .short_help = "set ip6 link-local address <interface> <ip6-address>",
3821   .function = set_ip6_link_local_address_cmd,
3822 };
3823 /* *INDENT-ON* */
3824
3825 /**
3826  * @brief callback when an interface address is added or deleted
3827  */
3828 static void
3829 ip6_neighbor_add_del_interface_address (ip6_main_t * im,
3830                                         uword opaque,
3831                                         u32 sw_if_index,
3832                                         ip6_address_t * address,
3833                                         u32 address_length,
3834                                         u32 if_address_index, u32 is_delete)
3835 {
3836   vnet_main_t *vnm = vnet_get_main ();
3837   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3838   u32 ri;
3839   vlib_main_t *vm = vnm->vlib_main;
3840   ip6_radv_t *radv_info;
3841   ip6_address_t a;
3842
3843   /* create solicited node multicast address for this interface adddress */
3844   ip6_set_solicited_node_multicast_address (&a, 0);
3845
3846   a.as_u8[0xd] = address->as_u8[0xd];
3847   a.as_u8[0xe] = address->as_u8[0xe];
3848   a.as_u8[0xf] = address->as_u8[0xf];
3849
3850   if (!is_delete)
3851     {
3852       /* try to  create radv_info - does nothing if ipv6 already enabled */
3853       enable_ip6_interface (vm, sw_if_index);
3854
3855       /* look up the radv_t  information for this interface */
3856       vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3857                                sw_if_index, ~0);
3858       ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3859       if (ri != ~0)
3860         {
3861           /* get radv_info */
3862           radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3863
3864           /* add address */
3865           if (!ip6_address_is_link_local_unicast (address))
3866             radv_info->ref_count++;
3867
3868           ip6_neighbor_add_mld_prefix (radv_info, &a);
3869         }
3870     }
3871   else
3872     {
3873
3874       /* delete */
3875       /* look up the radv_t  information for this interface */
3876       vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3877                                sw_if_index, ~0);
3878       ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3879
3880       if (ri != ~0)
3881         {
3882           /* get radv_info */
3883           radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3884
3885           ip6_neighbor_del_mld_prefix (radv_info, &a);
3886
3887           /* if interface up send MLDP "report" */
3888           radv_info->all_routers_mcast = 0;
3889
3890           /* add address */
3891           if (!ip6_address_is_link_local_unicast (address))
3892             radv_info->ref_count--;
3893         }
3894       /* Ensure that IPv6 is disabled, and LL removed after ref_count reaches 0 */
3895       disable_ip6_interface (vm, sw_if_index);
3896     }
3897 }
3898
3899 clib_error_t *
3900 ip6_set_neighbor_limit (u32 neighbor_limit)
3901 {
3902   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3903
3904   nm->limit_neighbor_cache_size = neighbor_limit;
3905   return 0;
3906 }
3907
3908 static void
3909 ip6_neighbor_table_bind (ip6_main_t * im,
3910                          uword opaque,
3911                          u32 sw_if_index,
3912                          u32 new_fib_index, u32 old_fib_index)
3913 {
3914   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3915   ip6_neighbor_t *n = NULL;
3916   u32 i, *to_re_add = 0;
3917
3918   /* *INDENT-OFF* */
3919   pool_foreach (n, nm->neighbor_pool,
3920   ({
3921     if (n->key.sw_if_index == sw_if_index)
3922       vec_add1 (to_re_add, n - nm->neighbor_pool);
3923   }));
3924   /* *INDENT-ON* */
3925
3926   for (i = 0; i < vec_len (to_re_add); i++)
3927     {
3928       n = pool_elt_at_index (nm->neighbor_pool, to_re_add[i]);
3929       ip6_neighbor_adj_fib_remove (n, old_fib_index);
3930       ip6_neighbor_adj_fib_add (n, new_fib_index);
3931     }
3932   vec_free (to_re_add);
3933 }
3934
3935 static clib_error_t *
3936 ip6_neighbor_init (vlib_main_t * vm)
3937 {
3938   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3939   ip6_main_t *im = &ip6_main;
3940
3941   mhash_init (&nm->neighbor_index_by_key,
3942               /* value size */ sizeof (uword),
3943               /* key size */ sizeof (ip6_neighbor_key_t));
3944
3945   icmp6_register_type (vm, ICMP6_neighbor_solicitation,
3946                        ip6_icmp_neighbor_solicitation_node.index);
3947   icmp6_register_type (vm, ICMP6_neighbor_advertisement,
3948                        ip6_icmp_neighbor_advertisement_node.index);
3949   icmp6_register_type (vm, ICMP6_router_solicitation,
3950                        ip6_icmp_router_solicitation_node.index);
3951   icmp6_register_type (vm, ICMP6_router_advertisement,
3952                        ip6_icmp_router_advertisement_node.index);
3953
3954   /* handler node for ip6 neighbor discovery events and timers */
3955   vlib_register_node (vm, &ip6_icmp_neighbor_discovery_event_node);
3956
3957   /* add call backs */
3958   ip6_add_del_interface_address_callback_t cb;
3959   memset (&cb, 0x0, sizeof (ip6_add_del_interface_address_callback_t));
3960
3961   /* when an interface address changes... */
3962   cb.function = ip6_neighbor_add_del_interface_address;
3963   cb.function_opaque = 0;
3964   vec_add1 (im->add_del_interface_address_callbacks, cb);
3965
3966   ip6_table_bind_callback_t cbt;
3967   cbt.function = ip6_neighbor_table_bind;
3968   cbt.function_opaque = 0;
3969   vec_add1 (im->table_bind_callbacks, cbt);
3970
3971   mhash_init (&nm->pending_resolutions_by_address,
3972               /* value size */ sizeof (uword),
3973               /* key size */ sizeof (ip6_address_t));
3974
3975   mhash_init (&nm->mac_changes_by_address,
3976               /* value size */ sizeof (uword),
3977               /* key size */ sizeof (ip6_address_t));
3978
3979   /* default, configurable */
3980   nm->limit_neighbor_cache_size = 50000;
3981
3982   nm->wc_ip6_nd_publisher_node = (uword) ~ 0;
3983
3984 #if 0
3985   /* $$$$ Hack fix for today */
3986   vec_validate_init_empty
3987     (im->discover_neighbor_next_index_by_hw_if_index, 32, 0 /* drop */ );
3988 #endif
3989
3990   return 0;
3991 }
3992
3993 VLIB_INIT_FUNCTION (ip6_neighbor_init);
3994
3995
3996 void
3997 vnet_register_ip6_neighbor_resolution_event (vnet_main_t * vnm,
3998                                              void *address_arg,
3999                                              uword node_index,
4000                                              uword type_opaque, uword data)
4001 {
4002   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4003   ip6_address_t *address = address_arg;
4004   uword *p;
4005   pending_resolution_t *pr;
4006
4007   pool_get (nm->pending_resolutions, pr);
4008
4009   pr->next_index = ~0;
4010   pr->node_index = node_index;
4011   pr->type_opaque = type_opaque;
4012   pr->data = data;
4013
4014   p = mhash_get (&nm->pending_resolutions_by_address, address);
4015   if (p)
4016     {
4017       /* Insert new resolution at the head of the list */
4018       pr->next_index = p[0];
4019       mhash_unset (&nm->pending_resolutions_by_address, address, 0);
4020     }
4021
4022   mhash_set (&nm->pending_resolutions_by_address, address,
4023              pr - nm->pending_resolutions, 0 /* old value */ );
4024 }
4025
4026 int
4027 vnet_add_del_ip6_nd_change_event (vnet_main_t * vnm,
4028                                   void *data_callback,
4029                                   u32 pid,
4030                                   void *address_arg,
4031                                   uword node_index,
4032                                   uword type_opaque, uword data, int is_add)
4033 {
4034   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4035   ip6_address_t *address = address_arg;
4036
4037   /* Try to find an existing entry */
4038   u32 *first = (u32 *) mhash_get (&nm->mac_changes_by_address, address);
4039   u32 *p = first;
4040   pending_resolution_t *mc;
4041   while (p && *p != ~0)
4042     {
4043       mc = pool_elt_at_index (nm->mac_changes, *p);
4044       if (mc->node_index == node_index && mc->type_opaque == type_opaque
4045           && mc->pid == pid)
4046         break;
4047       p = &mc->next_index;
4048     }
4049
4050   int found = p && *p != ~0;
4051   if (is_add)
4052     {
4053       if (found)
4054         return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
4055
4056       pool_get (nm->mac_changes, mc);
4057       *mc = (pending_resolution_t)
4058       {
4059       .next_index = ~0,.node_index = node_index,.type_opaque =
4060           type_opaque,.data = data,.data_callback = data_callback,.pid =
4061           pid,};
4062
4063       /* Insert new resolution at the end of the list */
4064       u32 new_idx = mc - nm->mac_changes;
4065       if (p)
4066         p[0] = new_idx;
4067       else
4068         mhash_set (&nm->mac_changes_by_address, address, new_idx, 0);
4069     }
4070   else
4071     {
4072       if (!found)
4073         return VNET_API_ERROR_NO_SUCH_ENTRY;
4074
4075       /* Clients may need to clean up pool entries, too */
4076       void (*fp) (u32, u8 *) = data_callback;
4077       if (fp)
4078         (*fp) (mc->data, 0 /* no new mac addrs */ );
4079
4080       /* Remove the entry from the list and delete the entry */
4081       *p = mc->next_index;
4082       pool_put (nm->mac_changes, mc);
4083
4084       /* Remove from hash if we deleted the last entry */
4085       if (*p == ~0 && p == first)
4086         mhash_unset (&nm->mac_changes_by_address, address, 0);
4087     }
4088   return 0;
4089 }
4090
4091 int
4092 vnet_ip6_nd_term (vlib_main_t * vm,
4093                   vlib_node_runtime_t * node,
4094                   vlib_buffer_t * p0,
4095                   ethernet_header_t * eth,
4096                   ip6_header_t * ip, u32 sw_if_index, u16 bd_index)
4097 {
4098   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4099   icmp6_neighbor_solicitation_or_advertisement_header_t *ndh;
4100
4101   ndh = ip6_next_header (ip);
4102   if (ndh->icmp.type != ICMP6_neighbor_solicitation &&
4103       ndh->icmp.type != ICMP6_neighbor_advertisement)
4104     return 0;
4105
4106   if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
4107                      (p0->flags & VLIB_BUFFER_IS_TRACED)))
4108     {
4109       u8 *t0 = vlib_add_trace (vm, node, p0,
4110                                sizeof (icmp6_input_trace_t));
4111       clib_memcpy (t0, ip, sizeof (icmp6_input_trace_t));
4112     }
4113
4114   /* Check if anyone want ND events for L2 BDs */
4115   if (PREDICT_FALSE
4116       (nm->wc_ip6_nd_publisher_node != (uword) ~ 0
4117        && !ip6_address_is_link_local_unicast (&ip->src_address)))
4118     {
4119       vnet_nd_wc_publish (sw_if_index, eth->src_address, &ip->src_address);
4120     }
4121
4122   /* Check if MAC entry exsist for solicited target IP */
4123   if (ndh->icmp.type == ICMP6_neighbor_solicitation)
4124     {
4125       icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *opt;
4126       l2_bridge_domain_t *bd_config;
4127       u8 *macp;
4128
4129       opt = (void *) (ndh + 1);
4130       if ((opt->header.type !=
4131            ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address) ||
4132           (opt->header.n_data_u64s != 1))
4133         return 0;               /* source link layer address option not present */
4134
4135       bd_config = vec_elt_at_index (l2input_main.bd_configs, bd_index);
4136       macp =
4137         (u8 *) hash_get_mem (bd_config->mac_by_ip6, &ndh->target_address);
4138       if (macp)
4139         {                       /* found ip-mac entry, generate eighbor advertisement response */
4140           int bogus_length;
4141           vlib_node_runtime_t *error_node =
4142             vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
4143           ip->dst_address = ip->src_address;
4144           ip->src_address = ndh->target_address;
4145           ip->hop_limit = 255;
4146           opt->header.type =
4147             ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
4148           clib_memcpy (opt->ethernet_address, macp, 6);
4149           ndh->icmp.type = ICMP6_neighbor_advertisement;
4150           ndh->advertisement_flags = clib_host_to_net_u32
4151             (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED |
4152              ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
4153           ndh->icmp.checksum = 0;
4154           ndh->icmp.checksum =
4155             ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip, &bogus_length);
4156           clib_memcpy (eth->dst_address, eth->src_address, 6);
4157           clib_memcpy (eth->src_address, macp, 6);
4158           vlib_error_count (vm, error_node->node_index,
4159                             ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX, 1);
4160           return 1;
4161         }
4162     }
4163
4164   return 0;
4165
4166 }
4167
4168 int
4169 ip6_neighbor_proxy_add_del (u32 sw_if_index, ip6_address_t * addr, u8 is_del)
4170 {
4171   u32 fib_index;
4172
4173   fib_prefix_t pfx = {
4174     .fp_len = 128,
4175     .fp_proto = FIB_PROTOCOL_IP6,
4176     .fp_addr = {
4177                 .ip6 = *addr,
4178                 },
4179   };
4180   ip46_address_t nh = {
4181     .ip6 = *addr,
4182   };
4183
4184   fib_index = ip6_fib_table_get_index_for_sw_if_index (sw_if_index);
4185
4186   if (~0 == fib_index)
4187     return VNET_API_ERROR_NO_SUCH_FIB;
4188
4189   if (is_del)
4190     {
4191       fib_table_entry_path_remove (fib_index,
4192                                    &pfx,
4193                                    FIB_SOURCE_IP6_ND_PROXY,
4194                                    DPO_PROTO_IP6,
4195                                    &nh,
4196                                    sw_if_index,
4197                                    ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
4198       /* flush the ND cache of this address if it's there */
4199       vnet_unset_ip6_ethernet_neighbor (vlib_get_main (),
4200                                         sw_if_index, addr, NULL, 0);
4201     }
4202   else
4203     {
4204       fib_table_entry_path_add (fib_index,
4205                                 &pfx,
4206                                 FIB_SOURCE_IP6_ND_PROXY,
4207                                 FIB_ENTRY_FLAG_NONE,
4208                                 DPO_PROTO_IP6,
4209                                 &nh,
4210                                 sw_if_index,
4211                                 ~0, 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
4212     }
4213   return (0);
4214 }
4215
4216 static clib_error_t *
4217 set_ip6_nd_proxy_cmd (vlib_main_t * vm,
4218                       unformat_input_t * input, vlib_cli_command_t * cmd)
4219 {
4220   vnet_main_t *vnm = vnet_get_main ();
4221   clib_error_t *error = 0;
4222   ip6_address_t addr;
4223   u32 sw_if_index;
4224   u8 is_del = 0;
4225
4226   if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4227     {
4228       /* get the rest of the command */
4229       while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
4230         {
4231           if (unformat (input, "%U", unformat_ip6_address, &addr))
4232             break;
4233           else if (unformat (input, "delete") || unformat (input, "del"))
4234             is_del = 1;
4235           else
4236             return (unformat_parse_error (input));
4237         }
4238     }
4239
4240   ip6_neighbor_proxy_add_del (sw_if_index, &addr, is_del);
4241
4242   return error;
4243 }
4244
4245 /* *INDENT-OFF* */
4246 VLIB_CLI_COMMAND (set_ip6_nd_proxy_command, static) =
4247 {
4248   .path = "set ip6 nd proxy",
4249   .short_help = "set ip6 nd proxy <HOST> <INTERFACE>",
4250   .function = set_ip6_nd_proxy_cmd,
4251 };
4252 /* *INDENT-ON* */
4253
4254 void
4255 ethernet_ndp_change_mac (u32 sw_if_index)
4256 {
4257   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4258   ip6_neighbor_t *n;
4259
4260   /* *INDENT-OFF* */
4261   pool_foreach (n, nm->neighbor_pool,
4262   ({
4263     if (n->key.sw_if_index == sw_if_index)
4264       {
4265         adj_nbr_walk_nh6 (sw_if_index,
4266                           &n->key.ip6_address,
4267                           ip6_nd_mk_complete_walk, n);
4268       }
4269   }));
4270   /* *INDENT-ON* */
4271 }
4272
4273 void
4274 send_ip6_na (vlib_main_t * vm, vnet_hw_interface_t * hi)
4275 {
4276   ip6_main_t *i6m = &ip6_main;
4277   u32 sw_if_index = hi->sw_if_index;
4278   ip6_address_t *ip6_addr = ip6_interface_first_address (i6m, sw_if_index);
4279   if (ip6_addr)
4280     {
4281       clib_warning
4282         ("Sending unsolicitated NA IP6 address %U on sw_if_idex %d",
4283          format_ip6_address, ip6_addr, sw_if_index);
4284
4285       /* Form unsolicited neighbor advertisement packet from NS pkt template */
4286       int bogus_length;
4287       u32 bi = 0;
4288       icmp6_neighbor_solicitation_header_t *h =
4289         vlib_packet_template_get_packet (vm,
4290                                          &i6m->discover_neighbor_packet_template,
4291                                          &bi);
4292       ip6_set_reserved_multicast_address (&h->ip.dst_address,
4293                                           IP6_MULTICAST_SCOPE_link_local,
4294                                           IP6_MULTICAST_GROUP_ID_all_hosts);
4295       h->ip.src_address = ip6_addr[0];
4296       h->neighbor.icmp.type = ICMP6_neighbor_advertisement;
4297       h->neighbor.target_address = ip6_addr[0];
4298       h->neighbor.advertisement_flags = clib_host_to_net_u32
4299         (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
4300       clib_memcpy (h->link_layer_option.ethernet_address,
4301                    hi->hw_address, vec_len (hi->hw_address));
4302       h->neighbor.icmp.checksum =
4303         ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
4304       ASSERT (bogus_length == 0);
4305
4306       /* Setup MAC header with IP6 Etype and mcast DMAC */
4307       vlib_buffer_t *b = vlib_get_buffer (vm, bi);
4308       vlib_buffer_advance (b, -sizeof (ethernet_header_t));
4309       ethernet_header_t *e = vlib_buffer_get_current (b);
4310       e->type = clib_host_to_net_u16 (ETHERNET_TYPE_IP6);
4311       clib_memcpy (e->src_address, hi->hw_address, sizeof (e->src_address));
4312       ip6_multicast_ethernet_address (e->dst_address,
4313                                       IP6_MULTICAST_GROUP_ID_all_hosts);
4314
4315       /* Send unsolicited ND advertisement packet out the specified interface */
4316       vnet_buffer (b)->sw_if_index[VLIB_RX] =
4317         vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
4318       vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
4319       u32 *to_next = vlib_frame_vector_args (f);
4320       to_next[0] = bi;
4321       f->n_vectors = 1;
4322       vlib_put_frame_to_node (vm, hi->output_node_index, f);
4323     }
4324 }
4325
4326 /*
4327  * fd.io coding-style-patch-verification: ON
4328  *
4329  * Local Variables:
4330  * eval: (c-set-style "gnu")
4331  * End:
4332  */