2 * ip/ip6_neighbor.c: IP6 neighbor handling
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:
9 * http://www.apache.org/licenses/LICENSE-2.0
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.
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 <vnet/adj/adj.h>
23 #include <vnet/adj/adj_mcast.h>
24 #include <vnet/fib/fib_table.h>
25 #include <vnet/fib/ip6_fib.h>
26 #include <vnet/mfib/ip6_mfib.h>
27 #include <vnet/ip/ip6_ll_table.h>
28 #include <vnet/l2/l2_input.h>
32 * @brief IPv6 Neighbor Adjacency and Neighbor Discovery.
34 * The files contains the API and CLI code for managing IPv6 neighbor
35 * adjacency tables and neighbor discovery logic.
38 /* can't use sizeof link_layer_address, that's 8 */
39 #define ETHER_MAC_ADDR_LEN 6
41 /* advertised prefix option */
44 /* basic advertised information */
48 int adv_autonomous_flag;
49 u32 adv_valid_lifetime_in_secs;
50 u32 adv_pref_lifetime_in_secs;
52 /* advertised values are computed from these times if decrementing */
53 f64 valid_lifetime_expires;
54 f64 pref_lifetime_expires;
56 /* local information */
58 int deprecated_prefix_flag;
59 int decrement_lifetime_flag;
61 #define MIN_ADV_VALID_LIFETIME 7203 /* seconds */
62 #define DEF_ADV_VALID_LIFETIME 2592000
63 #define DEF_ADV_PREF_LIFETIME 604800
65 /* extensions are added here, mobile, DNS etc.. */
71 /* group information */
73 ip6_address_t mcast_address;
75 ip6_address_t *mcast_source_address_pool;
78 /* configured router advertisement information per ipv6 interface */
82 /* advertised config information, zero means unspecified */
86 u16 adv_router_lifetime_in_sec;
87 u32 adv_neighbor_reachable_time_in_msec;
88 u32 adv_time_in_msec_between_retransmitted_neighbor_solicitations;
93 /* source link layer option */
94 u8 link_layer_address[8];
95 u8 link_layer_addr_len;
98 ip6_radv_prefix_t *adv_prefixes_pool;
100 /* Hash table mapping address to index in interface advertised prefix pool. */
101 mhash_t address_to_prefix_index;
103 /* MLDP group information */
104 ip6_mldp_group_t *mldp_group_pool;
106 /* Hash table mapping address to index in mldp address pool. */
107 mhash_t address_to_mldp_index;
109 /* local information */
111 int send_radv; /* radv on/off on this interface - set by config */
112 int cease_radv; /* we are ceasing to send - set byf config */
114 int adv_link_layer_address;
116 int failed_device_check;
117 int all_routers_mcast;
121 adj_index_t mcast_adj_index;
123 /* timing information */
124 #define DEF_MAX_RADV_INTERVAL 200
125 #define DEF_MIN_RADV_INTERVAL .75 * DEF_MAX_RADV_INTERVAL
126 #define DEF_CURR_HOP_LIMIT 64
127 #define DEF_DEF_RTR_LIFETIME 3 * DEF_MAX_RADV_INTERVAL
128 #define MAX_DEF_RTR_LIFETIME 9000
130 #define MAX_INITIAL_RTR_ADVERT_INTERVAL 16 /* seconds */
131 #define MAX_INITIAL_RTR_ADVERTISEMENTS 3 /*transmissions */
132 #define MIN_DELAY_BETWEEN_RAS 3 /* seconds */
133 #define MAX_DELAY_BETWEEN_RAS 1800 /* seconds */
134 #define MAX_RA_DELAY_TIME .5 /* seconds */
136 f64 max_radv_interval;
137 f64 min_radv_interval;
138 f64 min_delay_between_radv;
139 f64 max_delay_between_radv;
140 f64 max_rtr_default_lifetime;
143 f64 last_multicast_time;
144 f64 next_multicast_time;
147 u32 initial_adverts_count;
148 f64 initial_adverts_interval;
149 u32 initial_adverts_sent;
152 u32 n_advertisements_sent;
153 u32 n_solicitations_rcvd;
154 u32 n_solicitations_dropped;
156 /* Link local address to use (defaults to underlying physical for logical interfaces */
157 ip6_address_t link_local_address;
159 /* router solicitations sending state */
160 u8 keep_sending_rs; /* when true then next fields are valid */
161 icmp6_send_router_solicitation_params_t params;
166 vlib_buffer_t *buffer;
175 /* Used for nd event notification only */
178 } pending_resolution_t;
183 /* Hash tables mapping name to opcode. */
184 uword *opcode_by_name;
186 /* lite beer "glean" adjacency handling */
187 mhash_t pending_resolutions_by_address;
188 pending_resolution_t *pending_resolutions;
190 /* Mac address change notification */
191 mhash_t mac_changes_by_address;
192 pending_resolution_t *mac_changes;
194 u32 *neighbor_input_next_index_by_hw_if_index;
196 ip6_neighbor_t *neighbor_pool;
198 mhash_t neighbor_index_by_key;
200 u32 *if_radv_pool_index_by_sw_if_index;
202 ip6_radv_t *if_radv_pool;
204 /* Neighbor attack mitigation */
205 u32 limit_neighbor_cache_size;
206 u32 neighbor_delete_rotor;
208 /* Wildcard nd report publisher */
209 uword wc_ip6_nd_publisher_node;
210 uword wc_ip6_nd_publisher_et;
212 /* Router advertisement report publisher */
213 uword ip6_ra_publisher_node;
214 uword ip6_ra_publisher_et;
215 } ip6_neighbor_main_t;
217 /* ipv6 neighbor discovery - timer/event types */
221 } ip6_icmp_neighbor_discovery_event_type_t;
231 } ip6_icmp_neighbor_discovery_event_data_t;
233 static ip6_neighbor_main_t ip6_neighbor_main;
234 ip6_neighbor_public_main_t ip6_neighbor_public_main;
235 static ip6_address_t ip6a_zero; /* ip6 address 0 */
237 static void wc_nd_signal_report (wc_nd_report_t * r);
238 static void ra_signal_report (ra_report_t * r);
241 ip6_neighbor_get_link_local_address (u32 sw_if_index)
243 static ip6_address_t empty_address = { {0} };
244 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
245 ip6_radv_t *radv_info;
248 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
251 clib_warning ("IPv6 is not enabled for sw_if_index %d", sw_if_index);
252 return empty_address;
254 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
255 if (radv_info == NULL)
257 clib_warning ("Internal error");
258 return empty_address;
260 return radv_info->link_local_address;
264 * @brief publish wildcard arp event
265 * @param sw_if_index The interface on which the ARP entires are acted
268 vnet_nd_wc_publish (u32 sw_if_index, u8 * mac, ip6_address_t * ip6)
271 .sw_if_index = sw_if_index,
274 memcpy (r.mac, mac, sizeof r.mac);
276 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
277 vl_api_rpc_call_main_thread (wc_nd_signal_report, (u8 *) & r, sizeof r);
282 wc_nd_signal_report (wc_nd_report_t * r)
284 vlib_main_t *vm = vlib_get_main ();
285 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
286 uword ni = nm->wc_ip6_nd_publisher_node;
287 uword et = nm->wc_ip6_nd_publisher_et;
289 if (ni == (uword) ~ 0)
292 vlib_process_signal_event_data (vm, ni, et, 1, sizeof *q);
298 wc_nd_set_publisher_node (uword node_index, uword event_type)
300 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
301 nm->wc_ip6_nd_publisher_node = node_index;
302 nm->wc_ip6_nd_publisher_et = event_type;
306 ra_publish (ra_report_t * r)
308 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
309 vl_api_rpc_call_main_thread (ra_signal_report, (u8 *) r, sizeof *r);
314 ra_signal_report (ra_report_t * r)
316 vlib_main_t *vm = vlib_get_main ();
317 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
318 uword ni = nm->ip6_ra_publisher_node;
319 uword et = nm->ip6_ra_publisher_et;
321 if (ni == (uword) ~ 0)
323 ra_report_t *q = vlib_process_signal_event_data (vm, ni, et, 1, sizeof *q);
329 ra_set_publisher_node (uword node_index, uword event_type)
331 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
332 nm->ip6_ra_publisher_node = node_index;
333 nm->ip6_ra_publisher_et = event_type;
337 format_ip6_neighbor_ip6_entry (u8 * s, va_list * va)
339 vlib_main_t *vm = va_arg (*va, vlib_main_t *);
340 ip6_neighbor_t *n = va_arg (*va, ip6_neighbor_t *);
341 vnet_main_t *vnm = vnet_get_main ();
342 vnet_sw_interface_t *si;
346 return format (s, "%=12s%=45s%=6s%=20s%=40s", "Time", "Address", "Flags",
347 "Link layer", "Interface");
349 if (n->flags & IP6_NEIGHBOR_FLAG_DYNAMIC)
350 flags = format (flags, "D");
352 if (n->flags & IP6_NEIGHBOR_FLAG_STATIC)
353 flags = format (flags, "S");
355 if (n->flags & IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY)
356 flags = format (flags, "N");
358 si = vnet_get_sw_interface (vnm, n->key.sw_if_index);
359 s = format (s, "%=12U%=45U%=6s%=20U%=40U",
360 format_vlib_time, vm, n->time_last_updated,
361 format_ip6_address, &n->key.ip6_address,
362 flags ? (char *) flags : "",
363 format_ethernet_address, n->link_layer_address,
364 format_vnet_sw_interface_name, vnm, si);
371 ip6_neighbor_adj_fib_remove (ip6_neighbor_t * n, u32 fib_index)
373 if (FIB_NODE_INDEX_INVALID != n->fib_entry_index)
375 if (ip6_address_is_link_local_unicast (&n->key.ip6_address))
377 ip6_ll_prefix_t pfx = {
378 .ilp_addr = n->key.ip6_address,
379 .ilp_sw_if_index = n->key.sw_if_index,
381 ip6_ll_table_entry_delete (&pfx);
387 .fp_proto = FIB_PROTOCOL_IP6,
388 .fp_addr.ip6 = n->key.ip6_address,
390 fib_table_entry_path_remove (fib_index,
395 n->key.sw_if_index, ~0,
396 1, FIB_ROUTE_PATH_FLAG_NONE);
406 u8 link_layer_address[6];
409 } ip6_neighbor_set_unset_rpc_args_t;
411 static void ip6_neighbor_set_unset_rpc_callback
412 (ip6_neighbor_set_unset_rpc_args_t * a);
414 static void set_unset_ip6_neighbor_rpc
417 const ip6_address_t * a,
418 const u8 * link_layer_address,
419 int is_add, int is_static, int is_no_fib_entry)
421 ip6_neighbor_set_unset_rpc_args_t args;
422 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
424 args.sw_if_index = sw_if_index;
425 args.is_add = is_add;
426 args.is_static = is_static;
427 args.is_no_fib_entry = is_no_fib_entry;
428 clib_memcpy (&args.addr, a, sizeof (*a));
429 if (NULL != link_layer_address)
430 clib_memcpy (args.link_layer_address, link_layer_address, 6);
432 vl_api_rpc_call_main_thread (ip6_neighbor_set_unset_rpc_callback,
433 (u8 *) & args, sizeof (args));
437 ip6_nbr_probe (ip_adjacency_t * adj)
439 icmp6_neighbor_solicitation_header_t *h;
440 vnet_main_t *vnm = vnet_get_main ();
441 ip6_main_t *im = &ip6_main;
442 ip_interface_address_t *ia;
443 ip6_address_t *dst, *src;
444 vnet_hw_interface_t *hi;
445 vnet_sw_interface_t *si;
451 vm = vlib_get_main ();
453 si = vnet_get_sw_interface (vnm, adj->rewrite_header.sw_if_index);
454 dst = &adj->sub_type.nbr.next_hop.ip6;
456 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
460 src = ip6_interface_address_matching_destination (im, dst,
468 h = vlib_packet_template_get_packet (vm,
469 &im->discover_neighbor_packet_template,
474 hi = vnet_get_sup_hw_interface (vnm, adj->rewrite_header.sw_if_index);
476 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
477 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
478 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
479 h->ip.src_address = src[0];
480 h->neighbor.target_address = dst[0];
482 clib_memcpy (h->link_layer_option.ethernet_address,
483 hi->hw_address, vec_len (hi->hw_address));
485 h->neighbor.icmp.checksum =
486 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
487 ASSERT (bogus_length == 0);
489 b = vlib_get_buffer (vm, bi);
490 vnet_buffer (b)->sw_if_index[VLIB_RX] =
491 vnet_buffer (b)->sw_if_index[VLIB_TX] = adj->rewrite_header.sw_if_index;
493 /* Add encapsulation string for software interface (e.g. ethernet header). */
494 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
495 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
498 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
499 u32 *to_next = vlib_frame_vector_args (f);
502 vlib_put_frame_to_node (vm, hi->output_node_index, f);
507 ip6_nd_mk_complete (adj_index_t ai, ip6_neighbor_t * nbr)
509 adj_nbr_update_rewrite (ai, ADJ_NBR_REWRITE_FLAG_COMPLETE,
510 ethernet_build_rewrite (vnet_get_main (),
511 nbr->key.sw_if_index,
512 adj_get_link_type (ai),
513 nbr->link_layer_address));
517 ip6_nd_mk_incomplete (adj_index_t ai)
519 ip_adjacency_t *adj = adj_get (ai);
521 adj_nbr_update_rewrite (ai,
522 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
523 ethernet_build_rewrite (vnet_get_main (),
526 adj_get_link_type (ai),
527 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
530 #define IP6_NBR_MK_KEY(k, sw_if_index, addr) \
532 k.sw_if_index = sw_if_index; \
533 k.ip6_address = *addr; \
537 static ip6_neighbor_t *
538 ip6_nd_find (u32 sw_if_index, const ip6_address_t * addr)
540 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
541 ip6_neighbor_t *n = NULL;
542 ip6_neighbor_key_t k;
545 IP6_NBR_MK_KEY (k, sw_if_index, addr);
547 p = mhash_get (&nm->neighbor_index_by_key, &k);
550 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
557 ip6_nd_mk_complete_walk (adj_index_t ai, void *ctx)
559 ip6_neighbor_t *nbr = ctx;
561 ip6_nd_mk_complete (ai, nbr);
563 return (ADJ_WALK_RC_CONTINUE);
567 ip6_nd_mk_incomplete_walk (adj_index_t ai, void *ctx)
569 ip6_nd_mk_incomplete (ai);
571 return (ADJ_WALK_RC_CONTINUE);
574 static clib_error_t *
575 ip6_neighbor_sw_interface_up_down (vnet_main_t * vnm,
576 u32 sw_if_index, u32 flags)
578 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
580 u32 i, *to_delete = 0;
583 pool_foreach (n, nm->neighbor_pool,
585 if (n->key.sw_if_index == sw_if_index)
586 vec_add1 (to_delete, n - nm->neighbor_pool);
590 if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
592 for (i = 0; i < vec_len (to_delete); i++)
594 n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
595 adj_nbr_walk_nh6 (n->key.sw_if_index, &n->key.ip6_address,
596 ip6_nd_mk_complete_walk, n);
601 for (i = 0; i < vec_len (to_delete); i++)
603 n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
604 adj_nbr_walk_nh6 (n->key.sw_if_index, &n->key.ip6_address,
605 ip6_nd_mk_incomplete_walk, NULL);
606 if (n->flags & IP6_NEIGHBOR_FLAG_STATIC)
608 ip6_neighbor_adj_fib_remove (n,
609 ip6_fib_table_get_index_for_sw_if_index
610 (n->key.sw_if_index));
611 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
612 pool_put (nm->neighbor_pool, n);
616 vec_free (to_delete);
620 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_neighbor_sw_interface_up_down);
623 ip6_ethernet_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
630 nbr = ip6_nd_find (sw_if_index, &adj->sub_type.nbr.next_hop.ip6);
632 switch (adj->lookup_next_index)
634 case IP_LOOKUP_NEXT_GLEAN:
635 adj_glean_update_rewrite (ai);
637 case IP_LOOKUP_NEXT_ARP:
640 adj_nbr_walk_nh6 (sw_if_index, &nbr->key.ip6_address,
641 ip6_nd_mk_complete_walk, nbr);
646 * no matching ND entry.
647 * construct the rewrite required to for an ND packet, and stick
648 * that in the adj's pipe to smoke.
650 adj_nbr_update_rewrite (ai,
651 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
652 ethernet_build_rewrite (vnm,
655 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
658 * since the FIB has added this adj for a route, it makes sense it may
659 * want to forward traffic sometime soon. Let's send a speculative ND.
660 * just one. If we were to do periodically that wouldn't be bad either,
661 * but that's more code than i'm prepared to write at this time for
662 * relatively little reward.
667 case IP_LOOKUP_NEXT_BCAST:
668 adj_nbr_update_rewrite (ai,
669 ADJ_NBR_REWRITE_FLAG_COMPLETE,
670 ethernet_build_rewrite (vnm,
673 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
675 case IP_LOOKUP_NEXT_MCAST:
678 * Construct a partial rewrite from the known ethernet mcast dest MAC
683 rewrite = ethernet_build_rewrite (vnm,
686 ethernet_ip6_mcast_dst_addr ());
689 * Complete the remaining fields of the adj's rewrite to direct the
690 * complete of the rewrite at switch time by copying in the IP
691 * dst address's bytes.
692 * Ofset is 2 bytes into the desintation address.
694 offset = vec_len (rewrite) - 2;
695 adj_mcast_update_rewrite (ai, rewrite, offset);
699 case IP_LOOKUP_NEXT_DROP:
700 case IP_LOOKUP_NEXT_PUNT:
701 case IP_LOOKUP_NEXT_LOCAL:
702 case IP_LOOKUP_NEXT_REWRITE:
703 case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
704 case IP_LOOKUP_NEXT_MIDCHAIN:
705 case IP_LOOKUP_NEXT_ICMP_ERROR:
706 case IP_LOOKUP_N_NEXT:
714 ip6_neighbor_adj_fib_add (ip6_neighbor_t * n, u32 fib_index)
716 if (ip6_address_is_link_local_unicast (&n->key.ip6_address))
718 ip6_ll_prefix_t pfx = {
719 .ilp_addr = n->key.ip6_address,
720 .ilp_sw_if_index = n->key.sw_if_index,
723 ip6_ll_table_entry_update (&pfx, FIB_ROUTE_PATH_FLAG_NONE);
729 .fp_proto = FIB_PROTOCOL_IP6,
730 .fp_addr.ip6 = n->key.ip6_address,
734 fib_table_entry_path_add (fib_index, &pfx, FIB_SOURCE_ADJ,
735 FIB_ENTRY_FLAG_ATTACHED,
736 DPO_PROTO_IP6, &pfx.fp_addr,
737 n->key.sw_if_index, ~0, 1, NULL,
738 FIB_ROUTE_PATH_FLAG_NONE);
742 static ip6_neighbor_t *
743 force_reuse_neighbor_entry (void)
746 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
748 u32 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
749 if (index == ~0) /* Try again from elt 0 */
750 index = pool_next_index (nm->neighbor_pool, index);
752 /* Find a non-static random entry to free up for reuse */
755 if ((count++ == 100) || (index == ~0))
756 return NULL; /* give up after 100 entries */
757 n = pool_elt_at_index (nm->neighbor_pool, index);
758 nm->neighbor_delete_rotor = index;
759 index = pool_next_index (nm->neighbor_pool, index);
761 while (n->flags & IP6_NEIGHBOR_FLAG_STATIC);
763 /* Remove ARP entry from its interface and update fib */
764 adj_nbr_walk_nh6 (n->key.sw_if_index,
765 &n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL);
766 ip6_neighbor_adj_fib_remove
767 (n, ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index));
768 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
774 vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
776 const ip6_address_t * a,
777 const u8 * link_layer_address,
778 uword n_bytes_link_layer_address,
779 int is_static, int is_no_fib_entry)
781 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
782 ip6_neighbor_key_t k;
783 ip6_neighbor_t *n = 0;
784 int make_new_nd_cache_entry = 1;
787 pending_resolution_t *pr, *mc;
789 if (vlib_get_thread_index ())
791 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
792 1 /* set new neighbor */ , is_static,
797 k.sw_if_index = sw_if_index;
798 k.ip6_address = a[0];
801 p = mhash_get (&nm->neighbor_index_by_key, &k);
804 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
805 /* Refuse to over-write static neighbor entry. */
806 if (!is_static && (n->flags & IP6_NEIGHBOR_FLAG_STATIC))
808 /* if MAC address match, still check to send event */
809 if (0 == memcmp (n->link_layer_address,
810 link_layer_address, n_bytes_link_layer_address))
811 goto check_customers;
814 make_new_nd_cache_entry = 0;
817 if (make_new_nd_cache_entry)
819 if (nm->limit_neighbor_cache_size &&
820 pool_elts (nm->neighbor_pool) >= nm->limit_neighbor_cache_size)
822 n = force_reuse_neighbor_entry ();
827 pool_get (nm->neighbor_pool, n);
829 mhash_set (&nm->neighbor_index_by_key, &k, n - nm->neighbor_pool,
832 n->fib_entry_index = FIB_NODE_INDEX_INVALID;
834 clib_memcpy (n->link_layer_address,
835 link_layer_address, n_bytes_link_layer_address);
838 * create the adj-fib. the entry in the FIB table for and to the peer.
840 if (!is_no_fib_entry)
842 ip6_neighbor_adj_fib_add
843 (n, ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index));
847 n->flags |= IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY;
853 * prevent a DoS attack from the data-plane that
854 * spams us with no-op updates to the MAC address
856 if (0 == memcmp (n->link_layer_address,
857 link_layer_address, n_bytes_link_layer_address))
859 n->time_last_updated = vlib_time_now (vm);
860 goto check_customers;
863 clib_memcpy (n->link_layer_address,
864 link_layer_address, n_bytes_link_layer_address);
867 /* Update time stamp and flags. */
868 n->time_last_updated = vlib_time_now (vm);
871 n->flags |= IP6_NEIGHBOR_FLAG_STATIC;
872 n->flags &= ~IP6_NEIGHBOR_FLAG_DYNAMIC;
876 n->flags |= IP6_NEIGHBOR_FLAG_DYNAMIC;
877 n->flags &= ~IP6_NEIGHBOR_FLAG_STATIC;
880 adj_nbr_walk_nh6 (sw_if_index,
881 &n->key.ip6_address, ip6_nd_mk_complete_walk, n);
884 /* Customer(s) waiting for this address to be resolved? */
885 p = mhash_get (&nm->pending_resolutions_by_address, a);
890 while (next_index != (u32) ~ 0)
892 pr = pool_elt_at_index (nm->pending_resolutions, next_index);
893 vlib_process_signal_event (vm, pr->node_index,
894 pr->type_opaque, pr->data);
895 next_index = pr->next_index;
896 pool_put (nm->pending_resolutions, pr);
899 mhash_unset (&nm->pending_resolutions_by_address, (void *) a, 0);
902 /* Customer(s) requesting ND event for this address? */
903 p = mhash_get (&nm->mac_changes_by_address, a);
908 while (next_index != (u32) ~ 0)
910 int (*fp) (u32, u8 *, u32, ip6_address_t *);
912 mc = pool_elt_at_index (nm->mac_changes, next_index);
913 fp = mc->data_callback;
915 /* Call the user's data callback, return 1 to suppress dup events */
918 (*fp) (mc->data, (u8 *) link_layer_address, sw_if_index,
921 * Signal the resolver process, as long as the user
922 * says they want to be notified
925 vlib_process_signal_event (vm, mc->node_index,
926 mc->type_opaque, mc->data);
927 next_index = mc->next_index;
935 vnet_unset_ip6_ethernet_neighbor (vlib_main_t * vm,
936 u32 sw_if_index, const ip6_address_t * a)
938 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
939 ip6_neighbor_key_t k;
944 if (vlib_get_thread_index ())
946 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, NULL,
947 0 /* unset */ , 0, 0);
951 k.sw_if_index = sw_if_index;
952 k.ip6_address = a[0];
955 p = mhash_get (&nm->neighbor_index_by_key, &k);
962 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
964 adj_nbr_walk_nh6 (sw_if_index,
965 &n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL);
966 ip6_neighbor_adj_fib_remove
967 (n, ip6_fib_table_get_index_for_sw_if_index (sw_if_index));
969 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
970 pool_put (nm->neighbor_pool, n);
976 static void ip6_neighbor_set_unset_rpc_callback
977 (ip6_neighbor_set_unset_rpc_args_t * a)
979 vlib_main_t *vm = vlib_get_main ();
981 vnet_set_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
982 a->link_layer_address, 6, a->is_static,
985 vnet_unset_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr);
989 ip6_neighbor_sort (void *a1, void *a2)
991 vnet_main_t *vnm = vnet_get_main ();
992 ip6_neighbor_t *n1 = a1, *n2 = a2;
994 cmp = vnet_sw_interface_compare (vnm, n1->key.sw_if_index,
995 n2->key.sw_if_index);
997 cmp = ip6_address_compare (&n1->key.ip6_address, &n2->key.ip6_address);
1002 ip6_neighbors_pool (void)
1004 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1005 return nm->neighbor_pool;
1009 ip6_neighbors_entries (u32 sw_if_index)
1011 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1012 ip6_neighbor_t *n, *ns = 0;
1015 pool_foreach (n, nm->neighbor_pool,
1017 if (sw_if_index != ~0 && n->key.sw_if_index != sw_if_index)
1019 vec_add1 (ns, n[0]);
1024 vec_sort_with_function (ns, ip6_neighbor_sort);
1028 static clib_error_t *
1029 show_ip6_neighbors (vlib_main_t * vm,
1030 unformat_input_t * input, vlib_cli_command_t * cmd)
1032 vnet_main_t *vnm = vnet_get_main ();
1033 ip6_neighbor_t *n, *ns;
1034 clib_error_t *error = 0;
1037 /* Filter entries by interface if given. */
1039 (void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index);
1041 ns = ip6_neighbors_entries (sw_if_index);
1044 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, 0);
1047 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, n);
1056 * This command is used to display the adjacent IPv6 hosts found via
1057 * neighbor discovery. Optionally, limit the output to the specified
1061 * Example of how to display the IPv6 neighbor adjacency table:
1062 * @cliexstart{show ip6 neighbors}
1063 * Time Address Flags Link layer Interface
1064 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
1065 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
1066 * 886.6654 ::1:1:c:0:9 S 02:fe:e4:45:27:5b GigabitEthernet3/0/0
1068 * Example of how to display the IPv6 neighbor adjacency table for given interface:
1069 * @cliexstart{show ip6 neighbors GigabitEthernet2/0/0}
1070 * Time Address Flags Link layer Interface
1071 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
1072 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
1076 VLIB_CLI_COMMAND (show_ip6_neighbors_command, static) = {
1077 .path = "show ip6 neighbors",
1078 .function = show_ip6_neighbors,
1079 .short_help = "show ip6 neighbors [<interface>]",
1083 static clib_error_t *
1084 set_ip6_neighbor (vlib_main_t * vm,
1085 unformat_input_t * input, vlib_cli_command_t * cmd)
1087 vnet_main_t *vnm = vnet_get_main ();
1093 int is_no_fib_entry = 0;
1096 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1098 /* intfc, ip6-address, mac-address */
1099 if (unformat (input, "%U %U %U",
1100 unformat_vnet_sw_interface, vnm, &sw_if_index,
1101 unformat_ip6_address, &addr,
1102 unformat_ethernet_address, mac_address))
1105 else if (unformat (input, "delete") || unformat (input, "del"))
1107 else if (unformat (input, "static"))
1109 else if (unformat (input, "no-fib-entry"))
1110 is_no_fib_entry = 1;
1116 return clib_error_return (0, "Missing interface, ip6 or hw address");
1119 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
1120 mac_address, sizeof (mac_address),
1121 is_static, is_no_fib_entry);
1123 vnet_unset_ip6_ethernet_neighbor (vm, sw_if_index, &addr);
1128 * This command is used to manually add an entry to the IPv6 neighbor
1129 * adjacency table. Optionally, the entry can be added as static. It is
1130 * also used to remove an entry from the table. Use the '<em>show ip6
1131 * neighbors</em>' command to display all learned and manually entered entries.
1134 * Example of how to add a static entry to the IPv6 neighbor adjacency table:
1135 * @cliexcmd{set ip6 neighbor GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b static}
1136 * Example of how to delete an entry from the IPv6 neighbor adjacency table:
1137 * @cliexcmd{set ip6 neighbor del GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b}
1140 VLIB_CLI_COMMAND (set_ip6_neighbor_command, static) =
1142 .path = "set ip6 neighbor",
1143 .function = set_ip6_neighbor,
1144 .short_help = "set ip6 neighbor [del] <interface> <ip6-address> <mac-address> [static]",
1150 ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP,
1151 ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY,
1152 ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
1153 } icmp6_neighbor_solicitation_or_advertisement_next_t;
1155 static_always_inline uword
1156 icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
1157 vlib_node_runtime_t * node,
1158 vlib_frame_t * frame,
1159 uword is_solicitation)
1161 vnet_main_t *vnm = vnet_get_main ();
1162 ip6_main_t *im = &ip6_main;
1163 uword n_packets = frame->n_vectors;
1164 u32 *from, *to_next;
1165 u32 n_left_from, n_left_to_next, next_index, n_advertisements_sent;
1166 icmp6_neighbor_discovery_option_type_t option_type;
1167 vlib_node_runtime_t *error_node =
1168 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1171 from = vlib_frame_vector_args (frame);
1172 n_left_from = n_packets;
1173 next_index = node->cached_next_index;
1175 if (node->flags & VLIB_NODE_FLAG_TRACE)
1176 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1178 sizeof (icmp6_input_trace_t));
1182 ? ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address
1183 : ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address);
1184 n_advertisements_sent = 0;
1186 while (n_left_from > 0)
1188 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1190 while (n_left_from > 0 && n_left_to_next > 0)
1194 icmp6_neighbor_solicitation_or_advertisement_header_t *h0;
1195 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1196 u32 bi0, options_len0, sw_if_index0, next0, error0;
1197 u32 ip6_sadd_link_local, ip6_sadd_unspecified;
1201 bi0 = to_next[0] = from[0];
1206 n_left_to_next -= 1;
1208 p0 = vlib_get_buffer (vm, bi0);
1209 ip0 = vlib_buffer_get_current (p0);
1210 h0 = ip6_next_header (ip0);
1212 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1214 error0 = ICMP6_ERROR_NONE;
1215 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1216 ip6_sadd_link_local =
1217 ip6_address_is_link_local_unicast (&ip0->src_address);
1218 ip6_sadd_unspecified =
1219 ip6_address_is_unspecified (&ip0->src_address);
1221 /* Check that source address is unspecified, link-local or else on-link. */
1222 if (!ip6_sadd_unspecified && !ip6_sadd_link_local)
1224 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1226 if (ADJ_INDEX_INVALID != src_adj_index0)
1228 ip_adjacency_t *adj0 = adj_get (src_adj_index0);
1230 /* Allow all realistic-looking rewrite adjacencies to pass */
1231 ni0 = adj0->lookup_next_index;
1232 is_rewrite0 = (ni0 >= IP_LOOKUP_NEXT_ARP) &&
1233 (ni0 < IP6_LOOKUP_N_NEXT);
1235 error0 = ((adj0->rewrite_header.sw_if_index != sw_if_index0
1238 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK
1244 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK;
1248 o0 = (void *) (h0 + 1);
1249 o0 = ((options_len0 == 8 && o0->header.type == option_type
1250 && o0->header.n_data_u64s == 1) ? o0 : 0);
1252 /* If src address unspecified or link local, donot learn neighbor MAC */
1253 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1254 !ip6_sadd_unspecified))
1256 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1259 &h0->target_address,
1260 o0->ethernet_address,
1261 sizeof (o0->ethernet_address),
1265 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1267 /* Check that target address is local to this router. */
1268 fib_node_index_t fei;
1272 ip6_fib_table_get_index_for_sw_if_index (sw_if_index0);
1274 if (~0 == fib_index)
1276 error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1280 if (ip6_address_is_link_local_unicast (&h0->target_address))
1282 fei = ip6_fib_table_lookup_exact_match
1283 (ip6_ll_fib_get (sw_if_index0),
1284 &h0->target_address, 128);
1288 fei = ip6_fib_table_lookup_exact_match (fib_index,
1289 &h0->target_address,
1293 if (FIB_NODE_INDEX_INVALID == fei)
1295 /* The target address is not in the FIB */
1297 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1301 if (FIB_ENTRY_FLAG_LOCAL &
1302 fib_entry_get_flags_for_source (fei,
1303 FIB_SOURCE_INTERFACE))
1305 /* It's an address that belongs to one of our interfaces
1309 if (fib_entry_is_sourced
1310 (fei, FIB_SOURCE_IP6_ND_PROXY) ||
1311 fib_entry_is_sourced (fei, FIB_SOURCE_IP6_ND))
1313 /* The address was added by IPv6 Proxy ND config.
1314 * We should only respond to these if the NS arrived on
1315 * the link that has a matching covering prefix */
1320 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1326 if (is_solicitation)
1327 next0 = (error0 != ICMP6_ERROR_NONE
1328 ? ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP
1329 : ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY);
1333 error0 = error0 == ICMP6_ERROR_NONE ?
1334 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_RX : error0;
1337 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1339 vnet_sw_interface_t *sw_if0;
1340 ethernet_interface_t *eth_if0;
1341 ethernet_header_t *eth0;
1343 /* dst address is either source address or the all-nodes mcast addr */
1344 if (!ip6_sadd_unspecified)
1345 ip0->dst_address = ip0->src_address;
1347 ip6_set_reserved_multicast_address (&ip0->dst_address,
1348 IP6_MULTICAST_SCOPE_link_local,
1349 IP6_MULTICAST_GROUP_ID_all_hosts);
1351 ip0->src_address = h0->target_address;
1352 ip0->hop_limit = 255;
1353 h0->icmp.type = ICMP6_neighbor_advertisement;
1355 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1356 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1358 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1361 clib_memcpy (o0->ethernet_address, eth_if0->address, 6);
1363 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
1366 h0->advertisement_flags = clib_host_to_net_u32
1367 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED
1368 | ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
1370 h0->icmp.checksum = 0;
1372 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1374 ASSERT (bogus_length == 0);
1376 /* Reuse current MAC header, copy SMAC to DMAC and
1377 * interface MAC to SMAC */
1378 vlib_buffer_advance (p0, -ethernet_buffer_header_size (p0));
1379 eth0 = vlib_buffer_get_current (p0);
1380 clib_memcpy (eth0->dst_address, eth0->src_address, 6);
1382 clib_memcpy (eth0->src_address, eth_if0->address, 6);
1384 /* Setup input and output sw_if_index for packet */
1385 ASSERT (vnet_buffer (p0)->sw_if_index[VLIB_RX] == sw_if_index0);
1386 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1387 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1388 vnet_main.local_interface_sw_if_index;
1390 n_advertisements_sent++;
1393 p0->error = error_node->errors[error0];
1395 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1396 to_next, n_left_to_next,
1400 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1403 /* Account for advertisements sent. */
1404 vlib_error_count (vm, error_node->node_index,
1405 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX,
1406 n_advertisements_sent);
1408 return frame->n_vectors;
1411 /* for "syslogging" - use elog for now */
1412 #define foreach_log_level \
1413 _ (DEBUG, "DEBUG") \
1414 _ (INFO, "INFORMATION") \
1415 _ (NOTICE, "NOTICE") \
1416 _ (WARNING, "WARNING") \
1418 _ (CRIT, "CRITICAL") \
1419 _ (ALERT, "ALERT") \
1420 _ (EMERG, "EMERGENCY")
1424 #define _(f,s) LOG_##f,
1429 static char *log_level_strings[] = {
1435 static int logmask = 1 << LOG_DEBUG;
1438 ip6_neighbor_syslog (vlib_main_t * vm, int priority, char *fmt, ...)
1440 /* just use elog for now */
1444 if ((priority > LOG_EMERG) || !(logmask & (1 << priority)))
1450 what = va_format (0, fmt, &va);
1452 ELOG_TYPE_DECLARE (e) =
1454 .format = "ip6 nd: (%s): %s",.format_args = "T4T4",};
1459 ed = ELOG_DATA (&vm->elog_main, e);
1460 ed->s[0] = elog_string (&vm->elog_main, log_level_strings[priority]);
1461 ed->s[1] = elog_string (&vm->elog_main, (char *) what);
1468 call_ip6_neighbor_callbacks (void *data,
1469 _vnet_ip6_neighbor_function_list_elt_t * elt)
1471 clib_error_t *error = 0;
1475 error = elt->fp (data);
1478 elt = elt->next_ip6_neighbor_function;
1484 /* ipv6 neighbor discovery - router advertisements */
1487 ICMP6_ROUTER_SOLICITATION_NEXT_DROP,
1488 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW,
1489 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX,
1490 ICMP6_ROUTER_SOLICITATION_N_NEXT,
1491 } icmp6_router_solicitation_or_advertisement_next_t;
1493 static_always_inline uword
1494 icmp6_router_solicitation (vlib_main_t * vm,
1495 vlib_node_runtime_t * node, vlib_frame_t * frame)
1497 vnet_main_t *vnm = vnet_get_main ();
1498 ip6_main_t *im = &ip6_main;
1499 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1500 uword n_packets = frame->n_vectors;
1501 u32 *from, *to_next;
1502 u32 n_left_from, n_left_to_next, next_index;
1503 u32 n_advertisements_sent = 0;
1506 icmp6_neighbor_discovery_option_type_t option_type;
1508 vlib_node_runtime_t *error_node =
1509 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1511 from = vlib_frame_vector_args (frame);
1512 n_left_from = n_packets;
1513 next_index = node->cached_next_index;
1515 if (node->flags & VLIB_NODE_FLAG_TRACE)
1516 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1518 sizeof (icmp6_input_trace_t));
1520 /* source may append his LL address */
1521 option_type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1523 while (n_left_from > 0)
1525 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1527 while (n_left_from > 0 && n_left_to_next > 0)
1531 ip6_radv_t *radv_info = 0;
1533 icmp6_neighbor_discovery_header_t *h0;
1534 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1536 u32 bi0, options_len0, sw_if_index0, next0, error0;
1537 u32 is_solicitation = 1, is_dropped = 0;
1538 u32 is_unspecified, is_link_local;
1540 bi0 = to_next[0] = from[0];
1545 n_left_to_next -= 1;
1547 p0 = vlib_get_buffer (vm, bi0);
1548 ip0 = vlib_buffer_get_current (p0);
1549 h0 = ip6_next_header (ip0);
1551 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1552 is_unspecified = ip6_address_is_unspecified (&ip0->src_address);
1554 ip6_address_is_link_local_unicast (&ip0->src_address);
1556 error0 = ICMP6_ERROR_NONE;
1557 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1559 /* check if solicitation (not from nd_timer node) */
1560 if (ip6_address_is_unspecified (&ip0->dst_address))
1561 is_solicitation = 0;
1563 /* Check that source address is unspecified, link-local or else on-link. */
1564 if (!is_unspecified && !is_link_local)
1566 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1568 if (ADJ_INDEX_INVALID != src_adj_index0)
1570 ip_adjacency_t *adj0 = adj_get (src_adj_index0);
1572 error0 = (adj0->rewrite_header.sw_if_index != sw_if_index0
1574 ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK
1579 error0 = ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK;
1583 /* check for source LL option and process */
1584 o0 = (void *) (h0 + 1);
1585 o0 = ((options_len0 == 8
1586 && o0->header.type == option_type
1587 && o0->header.n_data_u64s == 1) ? o0 : 0);
1589 /* if src address unspecified IGNORE any options */
1590 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1591 !is_unspecified && !is_link_local))
1593 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1595 o0->ethernet_address,
1596 sizeof (o0->ethernet_address),
1600 /* default is to drop */
1601 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1603 if (error0 == ICMP6_ERROR_NONE)
1605 vnet_sw_interface_t *sw_if0;
1606 ethernet_interface_t *eth_if0;
1609 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1610 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1612 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1614 /* only support ethernet interface type for now */
1616 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1619 if (error0 == ICMP6_ERROR_NONE)
1623 /* adjust the sizeof the buffer to just include the ipv6 header */
1624 p0->current_length -=
1626 sizeof (icmp6_neighbor_discovery_header_t));
1628 /* look up the radv_t information for this interface */
1629 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) >
1633 nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1636 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1641 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1644 if (error0 == ICMP6_ERROR_NONE)
1646 f64 now = vlib_time_now (vm);
1648 /* for solicited adverts - need to rate limit */
1649 if (is_solicitation)
1651 if (0 != radv_info->last_radv_time &&
1652 (now - radv_info->last_radv_time) <
1653 MIN_DELAY_BETWEEN_RAS)
1656 radv_info->last_radv_time = now;
1660 icmp6_router_advertisement_header_t rh;
1662 rh.icmp.type = ICMP6_router_advertisement;
1664 rh.icmp.checksum = 0;
1666 rh.current_hop_limit = radv_info->curr_hop_limit;
1667 rh.router_lifetime_in_sec =
1668 clib_host_to_net_u16
1669 (radv_info->adv_router_lifetime_in_sec);
1671 time_in_msec_between_retransmitted_neighbor_solicitations
1673 clib_host_to_net_u32 (radv_info->
1674 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
1675 rh.neighbor_reachable_time_in_msec =
1676 clib_host_to_net_u32 (radv_info->
1677 adv_neighbor_reachable_time_in_msec);
1680 (radv_info->adv_managed_flag) ?
1681 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP :
1684 ((radv_info->adv_other_flag) ?
1685 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP :
1689 u16 payload_length =
1690 sizeof (icmp6_router_advertisement_header_t);
1692 vlib_buffer_add_data (vm,
1693 vlib_buffer_get_free_list_index
1694 (p0), bi0, (void *) &rh,
1696 (icmp6_router_advertisement_header_t));
1698 if (radv_info->adv_link_layer_address)
1700 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
1704 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1705 h.header.n_data_u64s = 1;
1707 /* copy ll address */
1708 clib_memcpy (&h.ethernet_address[0],
1709 eth_if0->address, 6);
1711 vlib_buffer_add_data (vm,
1712 vlib_buffer_get_free_list_index
1713 (p0), bi0, (void *) &h,
1715 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t));
1719 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t);
1722 /* add MTU option */
1723 if (radv_info->adv_link_mtu)
1725 icmp6_neighbor_discovery_mtu_option_t h;
1729 clib_host_to_net_u32 (radv_info->adv_link_mtu);
1730 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu;
1731 h.header.n_data_u64s = 1;
1734 sizeof (icmp6_neighbor_discovery_mtu_option_t);
1736 vlib_buffer_add_data (vm,
1737 vlib_buffer_get_free_list_index
1738 (p0), bi0, (void *) &h,
1740 (icmp6_neighbor_discovery_mtu_option_t));
1743 /* add advertised prefix options */
1744 ip6_radv_prefix_t *pr_info;
1747 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
1749 if(pr_info->enabled &&
1750 (!pr_info->decrement_lifetime_flag
1751 || (pr_info->pref_lifetime_expires >0)))
1753 /* advertise this prefix */
1754 icmp6_neighbor_discovery_prefix_information_option_t h;
1756 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information;
1757 h.header.n_data_u64s = (sizeof(icmp6_neighbor_discovery_prefix_information_option_t) >> 3);
1759 h.dst_address_length = pr_info->prefix_len;
1761 h.flags = (pr_info->adv_on_link_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_FLAG_ON_LINK : 0;
1762 h.flags |= (pr_info->adv_autonomous_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_AUTO : 0;
1764 if(radv_info->cease_radv && pr_info->deprecated_prefix_flag)
1766 h.valid_time = clib_host_to_net_u32(MIN_ADV_VALID_LIFETIME);
1767 h.preferred_time = 0;
1771 if(pr_info->decrement_lifetime_flag)
1773 pr_info->adv_valid_lifetime_in_secs = ((pr_info->valid_lifetime_expires > now)) ?
1774 (pr_info->valid_lifetime_expires - now) : 0;
1776 pr_info->adv_pref_lifetime_in_secs = ((pr_info->pref_lifetime_expires > now)) ?
1777 (pr_info->pref_lifetime_expires - now) : 0;
1780 h.valid_time = clib_host_to_net_u32(pr_info->adv_valid_lifetime_in_secs);
1781 h.preferred_time = clib_host_to_net_u32(pr_info->adv_pref_lifetime_in_secs) ;
1785 clib_memcpy(&h.dst_address, &pr_info->prefix, sizeof(ip6_address_t));
1787 payload_length += sizeof( icmp6_neighbor_discovery_prefix_information_option_t);
1789 vlib_buffer_add_data (vm,
1790 vlib_buffer_get_free_list_index (p0),
1792 (void *)&h, sizeof(icmp6_neighbor_discovery_prefix_information_option_t));
1798 /* add additional options before here */
1800 /* finish building the router advertisement... */
1801 if (!is_unspecified && radv_info->send_unicast)
1803 ip0->dst_address = ip0->src_address;
1807 /* target address is all-nodes mcast addr */
1808 ip6_set_reserved_multicast_address
1810 IP6_MULTICAST_SCOPE_link_local,
1811 IP6_MULTICAST_GROUP_ID_all_hosts);
1814 /* source address MUST be the link-local address */
1815 ip0->src_address = radv_info->link_local_address;
1817 ip0->hop_limit = 255;
1818 ip0->payload_length =
1819 clib_host_to_net_u16 (payload_length);
1821 icmp6_router_advertisement_header_t *rh0 =
1822 (icmp6_router_advertisement_header_t *) (ip0 + 1);
1823 rh0->icmp.checksum =
1824 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1826 ASSERT (bogus_length == 0);
1828 /* setup output if and adjacency */
1829 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1830 vnet_main.local_interface_sw_if_index;
1832 if (is_solicitation)
1834 ethernet_header_t *eth0;
1835 /* Reuse current MAC header, copy SMAC to DMAC and
1836 * interface MAC to SMAC */
1837 vlib_buffer_reset (p0);
1838 eth0 = vlib_buffer_get_current (p0);
1839 clib_memcpy (eth0->dst_address, eth0->src_address,
1841 clib_memcpy (eth0->src_address, eth_if0->address,
1844 is_dropped ? next0 :
1845 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX;
1846 vnet_buffer (p0)->sw_if_index[VLIB_TX] =
1851 adj_index0 = radv_info->mcast_adj_index;
1852 if (adj_index0 == 0)
1853 error0 = ICMP6_ERROR_DST_LOOKUP_MISS;
1857 is_dropped ? next0 :
1858 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW;
1859 vnet_buffer (p0)->ip.adj_index[VLIB_TX] =
1863 p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
1865 radv_info->n_solicitations_dropped += is_dropped;
1866 radv_info->n_solicitations_rcvd += is_solicitation;
1868 if ((error0 == ICMP6_ERROR_NONE) && !is_dropped)
1870 radv_info->n_advertisements_sent++;
1871 n_advertisements_sent++;
1877 p0->error = error_node->errors[error0];
1879 if (error0 != ICMP6_ERROR_NONE)
1880 vlib_error_count (vm, error_node->node_index, error0, 1);
1882 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1883 to_next, n_left_to_next,
1888 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1891 /* Account for router advertisements sent. */
1892 vlib_error_count (vm, error_node->node_index,
1893 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_TX,
1894 n_advertisements_sent);
1896 return frame->n_vectors;
1899 /* validate advertised info for consistancy (see RFC-4861 section 6.2.7) - log any inconsistencies, packet will always be dropped */
1900 static_always_inline uword
1901 icmp6_router_advertisement (vlib_main_t * vm,
1902 vlib_node_runtime_t * node, vlib_frame_t * frame)
1904 vnet_main_t *vnm = vnet_get_main ();
1905 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1906 uword n_packets = frame->n_vectors;
1907 u32 *from, *to_next;
1908 u32 n_left_from, n_left_to_next, next_index;
1909 u32 n_advertisements_rcvd = 0;
1911 vlib_node_runtime_t *error_node =
1912 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1914 from = vlib_frame_vector_args (frame);
1915 n_left_from = n_packets;
1916 next_index = node->cached_next_index;
1918 if (node->flags & VLIB_NODE_FLAG_TRACE)
1919 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1921 sizeof (icmp6_input_trace_t));
1923 while (n_left_from > 0)
1925 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1927 while (n_left_from > 0 && n_left_to_next > 0)
1931 ip6_radv_t *radv_info = 0;
1932 icmp6_router_advertisement_header_t *h0;
1933 u32 bi0, options_len0, sw_if_index0, next0, error0;
1935 bi0 = to_next[0] = from[0];
1940 n_left_to_next -= 1;
1942 p0 = vlib_get_buffer (vm, bi0);
1943 ip0 = vlib_buffer_get_current (p0);
1944 h0 = ip6_next_header (ip0);
1946 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1948 error0 = ICMP6_ERROR_NONE;
1949 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1951 /* Check that source address is link-local */
1952 error0 = (!ip6_address_is_link_local_unicast (&ip0->src_address)) ?
1953 ICMP6_ERROR_ROUTER_ADVERTISEMENT_SOURCE_NOT_LINK_LOCAL : error0;
1955 /* default is to drop */
1956 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1958 n_advertisements_rcvd++;
1960 if (error0 == ICMP6_ERROR_NONE)
1962 vnet_sw_interface_t *sw_if0;
1963 ethernet_interface_t *eth_if0;
1965 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1966 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1968 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1970 /* only support ethernet interface type for now */
1972 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1975 if (error0 == ICMP6_ERROR_NONE)
1979 /* look up the radv_t information for this interface */
1980 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) >
1984 nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1987 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1992 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1995 if (error0 == ICMP6_ERROR_NONE)
1997 radv_info->keep_sending_rs = 0;
2001 r.sw_if_index = sw_if_index0;
2002 memcpy (r.router_address, &ip0->src_address, 16);
2003 r.current_hop_limit = h0->current_hop_limit;
2004 r.flags = h0->flags;
2005 r.router_lifetime_in_sec =
2006 clib_net_to_host_u16 (h0->router_lifetime_in_sec);
2007 r.neighbor_reachable_time_in_msec =
2008 clib_net_to_host_u32
2009 (h0->neighbor_reachable_time_in_msec);
2010 r.time_in_msec_between_retransmitted_neighbor_solicitations = clib_net_to_host_u32 (h0->time_in_msec_between_retransmitted_neighbor_solicitations);
2013 /* validate advertised information */
2014 if ((h0->current_hop_limit && radv_info->curr_hop_limit)
2015 && (h0->current_hop_limit !=
2016 radv_info->curr_hop_limit))
2018 ip6_neighbor_syslog (vm, LOG_WARNING,
2019 "our AdvCurHopLimit on %U doesn't agree with %U",
2020 format_vnet_sw_if_index_name,
2027 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP)
2028 != radv_info->adv_managed_flag)
2030 ip6_neighbor_syslog (vm, LOG_WARNING,
2031 "our AdvManagedFlag on %U doesn't agree with %U",
2032 format_vnet_sw_if_index_name,
2039 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP)
2040 != radv_info->adv_other_flag)
2042 ip6_neighbor_syslog (vm, LOG_WARNING,
2043 "our AdvOtherConfigFlag on %U doesn't agree with %U",
2044 format_vnet_sw_if_index_name,
2051 time_in_msec_between_retransmitted_neighbor_solicitations
2053 adv_time_in_msec_between_retransmitted_neighbor_solicitations)
2055 time_in_msec_between_retransmitted_neighbor_solicitations
2057 clib_host_to_net_u32 (radv_info->
2058 adv_time_in_msec_between_retransmitted_neighbor_solicitations)))
2060 ip6_neighbor_syslog (vm, LOG_WARNING,
2061 "our AdvRetransTimer on %U doesn't agree with %U",
2062 format_vnet_sw_if_index_name,
2068 if ((h0->neighbor_reachable_time_in_msec &&
2069 radv_info->adv_neighbor_reachable_time_in_msec) &&
2070 (h0->neighbor_reachable_time_in_msec !=
2071 clib_host_to_net_u32
2072 (radv_info->adv_neighbor_reachable_time_in_msec)))
2074 ip6_neighbor_syslog (vm, LOG_WARNING,
2075 "our AdvReachableTime on %U doesn't agree with %U",
2076 format_vnet_sw_if_index_name,
2082 /* check for MTU or prefix options or .. */
2083 u8 *opt_hdr = (u8 *) (h0 + 1);
2084 while (options_len0 > 0)
2086 icmp6_neighbor_discovery_option_header_t *o0 =
2087 (icmp6_neighbor_discovery_option_header_t *)
2089 int opt_len = o0->n_data_u64s << 3;
2090 icmp6_neighbor_discovery_option_type_t option_type =
2093 if (options_len0 < 2)
2095 ip6_neighbor_syslog (vm, LOG_ERR,
2096 "malformed RA packet on %U from %U",
2097 format_vnet_sw_if_index_name,
2106 ip6_neighbor_syslog (vm, LOG_ERR,
2107 " zero length option in RA on %U from %U",
2108 format_vnet_sw_if_index_name,
2114 else if (opt_len > options_len0)
2116 ip6_neighbor_syslog (vm, LOG_ERR,
2117 "option length in RA packet greater than total length on %U from %U",
2118 format_vnet_sw_if_index_name,
2125 options_len0 -= opt_len;
2128 switch (option_type)
2130 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address:
2132 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
2134 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
2137 if (opt_len < sizeof (*h))
2140 memcpy (r.slla, h->ethernet_address, 6);
2144 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu:
2146 icmp6_neighbor_discovery_mtu_option_t *h =
2147 (icmp6_neighbor_discovery_mtu_option_t
2150 if (opt_len < sizeof (*h))
2153 r.mtu = clib_net_to_host_u32 (h->mtu);
2155 if ((h->mtu && radv_info->adv_link_mtu) &&
2157 clib_host_to_net_u32
2158 (radv_info->adv_link_mtu)))
2160 ip6_neighbor_syslog (vm, LOG_WARNING,
2161 "our AdvLinkMTU on %U doesn't agree with %U",
2162 format_vnet_sw_if_index_name,
2170 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information:
2172 icmp6_neighbor_discovery_prefix_information_option_t
2174 (icmp6_neighbor_discovery_prefix_information_option_t
2177 /* validate advertised prefix options */
2178 ip6_radv_prefix_t *pr_info;
2179 u32 preferred, valid;
2181 if (opt_len < sizeof (*h))
2184 vec_validate (r.prefixes,
2185 vec_len (r.prefixes));
2186 ra_report_prefix_info_t *prefix =
2187 vec_elt_at_index (r.prefixes,
2188 vec_len (r.prefixes) - 1);
2191 clib_net_to_host_u32 (h->preferred_time);
2192 valid = clib_net_to_host_u32 (h->valid_time);
2194 prefix->preferred_time = preferred;
2195 prefix->valid_time = valid;
2196 prefix->flags = h->flags & 0xc0;
2197 prefix->dst_address_length =
2198 h->dst_address_length;
2199 prefix->dst_address = h->dst_address;
2201 /* look for matching prefix - if we our advertising it, it better be consistant */
2203 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
2207 ip6_address_mask_from_width(&mask, pr_info->prefix_len);
2209 if(pr_info->enabled &&
2210 (pr_info->prefix_len == h->dst_address_length) &&
2211 ip6_address_is_equal_masked (&pr_info->prefix, &h->dst_address, &mask))
2214 if(!pr_info->decrement_lifetime_flag &&
2215 valid != pr_info->adv_valid_lifetime_in_secs)
2217 ip6_neighbor_syslog(vm, LOG_WARNING,
2218 "our ADV validlifetime on %U for %U does not agree with %U",
2219 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
2220 format_ip6_address, &h->dst_address);
2222 if(!pr_info->decrement_lifetime_flag &&
2223 preferred != pr_info->adv_pref_lifetime_in_secs)
2225 ip6_neighbor_syslog(vm, LOG_WARNING,
2226 "our ADV preferredlifetime on %U for %U does not agree with %U",
2227 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
2228 format_ip6_address, &h->dst_address);
2246 p0->error = error_node->errors[error0];
2248 if (error0 != ICMP6_ERROR_NONE)
2249 vlib_error_count (vm, error_node->node_index, error0, 1);
2251 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2252 to_next, n_left_to_next,
2256 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2259 /* Account for router advertisements received. */
2260 vlib_error_count (vm, error_node->node_index,
2261 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_RX,
2262 n_advertisements_rcvd);
2264 return frame->n_vectors;
2268 random_f64_from_to (f64 from, f64 to)
2270 static u32 seed = 0;
2271 static u8 seed_set = 0;
2274 seed = random_default_seed ();
2277 return random_f64 (&seed) * (to - from) + from;
2281 get_mac_address (u32 sw_if_index, u8 * address)
2283 vnet_main_t *vnm = vnet_get_main ();
2284 vnet_hw_interface_t *hw_if = vnet_get_sup_hw_interface (vnm, sw_if_index);
2285 if (!hw_if->hw_address)
2287 clib_memcpy (address, hw_if->hw_address, 6);
2291 static inline vlib_buffer_t *
2292 create_buffer_for_rs (vlib_main_t * vm, ip6_radv_t * radv_info)
2296 vlib_buffer_free_list_t *fl;
2297 icmp6_router_solicitation_header_t *rh;
2302 sw_if_index = radv_info->sw_if_index;
2304 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
2306 clib_warning ("buffer allocation failure");
2310 p0 = vlib_get_buffer (vm, bi0);
2311 fl = vlib_buffer_get_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2312 vlib_buffer_init_for_free_list (p0, fl);
2313 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (p0);
2314 p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
2316 vnet_buffer (p0)->sw_if_index[VLIB_RX] = sw_if_index;
2317 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index;
2319 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
2321 rh = vlib_buffer_get_current (p0);
2322 p0->current_length = sizeof (*rh);
2324 rh->neighbor.icmp.type = ICMP6_router_solicitation;
2325 rh->neighbor.icmp.code = 0;
2326 rh->neighbor.icmp.checksum = 0;
2327 rh->neighbor.reserved_must_be_zero = 0;
2329 rh->link_layer_option.header.type =
2330 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2331 if (0 != get_mac_address (sw_if_index,
2332 rh->link_layer_option.ethernet_address))
2334 clib_warning ("interface with sw_if_index %u has no mac address",
2336 vlib_buffer_free (vm, &bi0, 1);
2339 rh->link_layer_option.header.n_data_u64s = 1;
2341 payload_length = sizeof (rh->neighbor) + sizeof (u64);
2343 rh->ip.ip_version_traffic_class_and_flow_label =
2344 clib_host_to_net_u32 (0x6 << 28);
2345 rh->ip.payload_length = clib_host_to_net_u16 (payload_length);
2346 rh->ip.protocol = IP_PROTOCOL_ICMP6;
2347 rh->ip.hop_limit = 255;
2348 rh->ip.src_address = radv_info->link_local_address;
2349 /* set address ff02::2 */
2350 rh->ip.dst_address.as_u64[0] = clib_host_to_net_u64 (0xff02L << 48);
2351 rh->ip.dst_address.as_u64[1] = clib_host_to_net_u64 (2);
2353 rh->neighbor.icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, p0,
2361 stop_sending_rs (vlib_main_t * vm, ip6_radv_t * ra)
2365 ra->keep_sending_rs = 0;
2368 bi0 = vlib_get_buffer_index (vm, ra->buffer);
2369 vlib_buffer_free (vm, &bi0, 1);
2375 check_send_rs (vlib_main_t * vm, ip6_radv_t * radv_info, f64 current_time,
2385 icmp6_send_router_solicitation_params_t *params;
2387 if (!radv_info->keep_sending_rs)
2390 params = &radv_info->params;
2392 if (radv_info->due_time > current_time)
2394 *due_time = radv_info->due_time;
2398 p0 = radv_info->buffer;
2400 next_index = ip6_rewrite_mcast_node.index;
2402 c0 = vlib_buffer_copy (vm, p0);
2403 ci0 = vlib_get_buffer_index (vm, c0);
2405 f = vlib_get_frame_to_node (vm, next_index);
2406 to_next = vlib_frame_vector_args (f);
2409 vlib_put_frame_to_node (vm, next_index, f);
2411 if (params->mrc != 0 && --radv_info->n_left == 0)
2412 stop_sending_rs (vm, radv_info);
2415 radv_info->sleep_interval =
2416 (2 + random_f64_from_to (-0.1, 0.1)) * radv_info->sleep_interval;
2417 if (radv_info->sleep_interval > params->mrt)
2418 radv_info->sleep_interval =
2419 (1 + random_f64_from_to (-0.1, 0.1)) * params->mrt;
2421 radv_info->due_time = current_time + radv_info->sleep_interval;
2423 if (params->mrd != 0
2424 && current_time > radv_info->start_time + params->mrd)
2425 stop_sending_rs (vm, radv_info);
2427 *due_time = radv_info->due_time;
2430 return radv_info->keep_sending_rs;
2434 send_rs_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
2437 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2438 ip6_radv_t *radv_info;
2439 uword *event_data = 0;
2440 f64 sleep_time = 1e9;
2447 vlib_process_wait_for_event_or_clock (vm, sleep_time);
2448 vlib_process_get_events (vm, &event_data);
2449 vec_reset_length (event_data);
2451 current_time = vlib_time_now (vm);
2454 due_time = current_time + 1e9;
2456 pool_foreach (radv_info, nm->if_radv_pool,
2458 if (check_send_rs (vm, radv_info, current_time, &dt)
2463 current_time = vlib_time_now (vm);
2465 while (due_time < current_time);
2467 sleep_time = due_time - current_time;
2474 VLIB_REGISTER_NODE (send_rs_process_node) = {
2475 .function = send_rs_process,
2476 .type = VLIB_NODE_TYPE_PROCESS,
2477 .name = "send-rs-process",
2482 icmp6_send_router_solicitation (vlib_main_t * vm, u32 sw_if_index, u8 stop,
2483 icmp6_send_router_solicitation_params_t *
2486 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2490 ASSERT (~0 != sw_if_index);
2492 rai = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2493 ra = pool_elt_at_index (nm->if_radv_pool, rai);
2495 stop_sending_rs (vm, ra);
2499 ra->keep_sending_rs = 1;
2500 ra->params = *params;
2501 ra->n_left = params->mrc;
2502 ra->start_time = vlib_time_now (vm);
2503 ra->sleep_interval = (1 + random_f64_from_to (-0.1, 0.1)) * params->irt;
2504 ra->due_time = 0; /* send first packet ASAP */
2505 ra->buffer = create_buffer_for_rs (vm, ra);
2507 ra->keep_sending_rs = 0;
2509 vlib_process_signal_event (vm, send_rs_process_node.index, 1, 0);
2514 * @brief Add a multicast Address to the advertised MLD set
2517 ip6_neighbor_add_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2519 ip6_mldp_group_t *mcast_group_info;
2522 /* lookup mldp info for this interface */
2523 p = mhash_get (&radv_info->address_to_mldp_index, addr);
2525 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2528 if (!mcast_group_info)
2532 pool_get (radv_info->mldp_group_pool, mcast_group_info);
2534 mi = mcast_group_info - radv_info->mldp_group_pool;
2535 mhash_set (&radv_info->address_to_mldp_index, addr, mi, /* old_value */
2538 mcast_group_info->type = 4;
2539 mcast_group_info->mcast_source_address_pool = 0;
2540 mcast_group_info->num_sources = 0;
2541 clib_memcpy (&mcast_group_info->mcast_address, addr,
2542 sizeof (ip6_address_t));
2547 * @brief Delete a multicast Address from the advertised MLD set
2550 ip6_neighbor_del_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2552 ip6_mldp_group_t *mcast_group_info;
2555 p = mhash_get (&radv_info->address_to_mldp_index, &addr);
2557 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2559 if (mcast_group_info)
2561 mhash_unset (&radv_info->address_to_mldp_index, &addr,
2563 pool_put (radv_info->mldp_group_pool, mcast_group_info);
2568 * @brief Add a multicast Address to the advertised MLD set
2571 ip6_neighbor_add_mld_grp (ip6_radv_t * a,
2572 ip6_multicast_address_scope_t scope,
2573 ip6_multicast_link_local_group_id_t group)
2577 ip6_set_reserved_multicast_address (&addr, scope, group);
2579 ip6_neighbor_add_mld_prefix (a, &addr);
2583 * @brief create and initialize router advertisement parameters with default
2584 * values for this intfc
2587 ip6_neighbor_sw_interface_add_del (vnet_main_t * vnm,
2588 u32 sw_if_index, u32 is_add)
2590 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2593 vnet_sw_interface_t *sw_if0;
2594 ethernet_interface_t *eth_if0 = 0;
2596 /* lookup radv container - ethernet interfaces only */
2597 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2598 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2599 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2604 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2606 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2610 a = pool_elt_at_index (nm->if_radv_pool, ri);
2614 ip6_radv_prefix_t *p;
2615 ip6_mldp_group_t *m;
2617 /* release the lock on the interface's mcast adj */
2618 adj_unlock (a->mcast_adj_index);
2620 /* clean up prefix and MDP pools */
2622 pool_flush(p, a->adv_prefixes_pool,
2624 mhash_unset (&a->address_to_prefix_index, &p->prefix, 0);
2626 pool_flush (m, a->mldp_group_pool,
2628 mhash_unset (&a->address_to_mldp_index, &m->mcast_address, 0);
2632 pool_free (a->mldp_group_pool);
2633 pool_free (a->adv_prefixes_pool);
2635 mhash_free (&a->address_to_prefix_index);
2636 mhash_free (&a->address_to_mldp_index);
2638 if (a->keep_sending_rs)
2639 a->keep_sending_rs = 0;
2641 pool_put (nm->if_radv_pool, a);
2642 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ~0;
2650 pool_get (nm->if_radv_pool, a);
2652 ri = a - nm->if_radv_pool;
2653 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ri;
2655 /* initialize default values (most of which are zero) */
2656 memset (a, 0, sizeof (a[0]));
2658 a->sw_if_index = sw_if_index;
2659 a->max_radv_interval = DEF_MAX_RADV_INTERVAL;
2660 a->min_radv_interval = DEF_MIN_RADV_INTERVAL;
2661 a->curr_hop_limit = DEF_CURR_HOP_LIMIT;
2662 a->adv_router_lifetime_in_sec = DEF_DEF_RTR_LIFETIME;
2664 /* send ll address source address option */
2665 a->adv_link_layer_address = 1;
2667 a->min_delay_between_radv = MIN_DELAY_BETWEEN_RAS;
2668 a->max_delay_between_radv = MAX_DELAY_BETWEEN_RAS;
2669 a->max_rtr_default_lifetime = MAX_DEF_RTR_LIFETIME;
2670 a->seed = (u32) clib_cpu_time_now ();
2671 (void) random_u32 (&a->seed);
2672 a->randomizer = clib_cpu_time_now ();
2673 (void) random_u64 (&a->randomizer);
2675 a->initial_adverts_count = MAX_INITIAL_RTR_ADVERTISEMENTS;
2676 a->initial_adverts_sent = a->initial_adverts_count - 1;
2677 a->initial_adverts_interval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
2679 /* deafult is to send */
2682 /* fill in radv_info for this interface that will be needed later */
2684 vnet_sw_interface_get_mtu (vnm, sw_if_index, VNET_MTU_IP6);
2686 clib_memcpy (a->link_layer_address, eth_if0->address, 6);
2688 /* fill in default link-local address (this may be overridden) */
2689 ip6_link_local_address_from_ethernet_address
2690 (&a->link_local_address, eth_if0->address);
2692 mhash_init (&a->address_to_prefix_index, sizeof (uword),
2693 sizeof (ip6_address_t));
2694 mhash_init (&a->address_to_mldp_index, sizeof (uword),
2695 sizeof (ip6_address_t));
2697 a->mcast_adj_index = adj_mcast_add_or_lock (FIB_PROTOCOL_IP6,
2701 a->keep_sending_rs = 0;
2703 /* add multicast groups we will always be reporting */
2704 ip6_neighbor_add_mld_grp (a,
2705 IP6_MULTICAST_SCOPE_link_local,
2706 IP6_MULTICAST_GROUP_ID_all_hosts);
2707 ip6_neighbor_add_mld_grp (a,
2708 IP6_MULTICAST_SCOPE_link_local,
2709 IP6_MULTICAST_GROUP_ID_all_routers);
2710 ip6_neighbor_add_mld_grp (a,
2711 IP6_MULTICAST_SCOPE_link_local,
2712 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2718 /* send an mldpv2 report */
2720 ip6_neighbor_send_mldpv2_report (u32 sw_if_index)
2722 vnet_main_t *vnm = vnet_get_main ();
2723 vlib_main_t *vm = vnm->vlib_main;
2724 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2725 vnet_sw_interface_t *sw_if0;
2726 ethernet_interface_t *eth_if0;
2730 ip6_radv_t *radv_info;
2740 icmp6_multicast_listener_report_header_t *rh0;
2741 icmp6_multicast_listener_report_packet_t *rp0;
2743 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2744 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
2745 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2747 if (!eth_if0 || !vnet_sw_interface_is_admin_up (vnm, sw_if_index))
2750 /* look up the radv_t information for this interface */
2751 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2754 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2759 /* send report now - build a mldpv2 report packet */
2760 n_allocated = vlib_buffer_alloc_from_free_list (vm,
2763 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2764 if (PREDICT_FALSE (n_allocated == 0))
2766 clib_warning ("buffer allocation failure");
2770 b0 = vlib_get_buffer (vm, bo0);
2772 /* adjust the sizeof the buffer to just include the ipv6 header */
2773 b0->current_length = sizeof (icmp6_multicast_listener_report_packet_t);
2775 payload_length = sizeof (icmp6_multicast_listener_report_header_t);
2777 b0->error = ICMP6_ERROR_NONE;
2779 rp0 = vlib_buffer_get_current (b0);
2780 ip0 = (ip6_header_t *) & rp0->ip;
2781 rh0 = (icmp6_multicast_listener_report_header_t *) & rp0->report_hdr;
2783 memset (rp0, 0x0, sizeof (icmp6_multicast_listener_report_packet_t));
2785 ip0->ip_version_traffic_class_and_flow_label =
2786 clib_host_to_net_u32 (0x6 << 28);
2788 ip0->protocol = IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS;
2789 /* for DEBUG - vnet driver won't seem to emit router alerts */
2790 /* ip0->protocol = IP_PROTOCOL_ICMP6; */
2793 rh0->icmp.type = ICMP6_multicast_listener_report_v2;
2795 /* source address MUST be the link-local address */
2796 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2797 ip0->src_address = radv_info->link_local_address;
2799 /* destination is all mldpv2 routers */
2800 ip6_set_reserved_multicast_address (&ip0->dst_address,
2801 IP6_MULTICAST_SCOPE_link_local,
2802 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2804 /* add reports here */
2805 ip6_mldp_group_t *m;
2806 int num_addr_records = 0;
2807 icmp6_multicast_address_record_t rr;
2809 /* fill in the hop-by-hop extension header (router alert) info */
2810 rh0->ext_hdr.next_hdr = IP_PROTOCOL_ICMP6;
2811 rh0->ext_hdr.n_data_u64s = 0;
2813 rh0->alert.type = IP6_MLDP_ALERT_TYPE;
2815 rh0->alert.value = 0;
2820 rh0->icmp.checksum = 0;
2823 pool_foreach (m, radv_info->mldp_group_pool,
2826 rr.aux_data_len_u32s = 0;
2827 rr.num_sources = clib_host_to_net_u16 (m->num_sources);
2828 clib_memcpy(&rr.mcast_addr, &m->mcast_address, sizeof(ip6_address_t));
2832 vlib_buffer_add_data
2833 (vm, vlib_buffer_get_free_list_index (b0), bo0,
2834 (void *)&rr, sizeof(icmp6_multicast_address_record_t));
2836 payload_length += sizeof( icmp6_multicast_address_record_t);
2841 rh0->num_addr_records = clib_host_to_net_u16 (num_addr_records);
2843 /* update lengths */
2844 ip0->payload_length = clib_host_to_net_u16 (payload_length);
2846 rh0->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0,
2848 ASSERT (bogus_length == 0);
2851 * OK to override w/ no regard for actual FIB, because
2852 * ip6-rewrite only looks at the adjacency.
2854 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
2855 vnet_main.local_interface_sw_if_index;
2857 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
2858 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
2860 vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite-mcast");
2862 f = vlib_get_frame_to_node (vm, node->index);
2863 to_next = vlib_frame_vector_args (f);
2867 vlib_put_frame_to_node (vm, node->index, f);
2872 VLIB_REGISTER_NODE (ip6_icmp_router_solicitation_node,static) =
2874 .function = icmp6_router_solicitation,
2875 .name = "icmp6-router-solicitation",
2877 .vector_size = sizeof (u32),
2879 .format_trace = format_icmp6_input_trace,
2881 .n_next_nodes = ICMP6_ROUTER_SOLICITATION_N_NEXT,
2883 [ICMP6_ROUTER_SOLICITATION_NEXT_DROP] = "ip6-drop",
2884 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW] = "ip6-rewrite-mcast",
2885 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX] = "interface-output",
2890 /* send a RA or update the timer info etc.. */
2892 ip6_neighbor_process_timer_event (vlib_main_t * vm,
2893 vlib_node_runtime_t * node,
2894 vlib_frame_t * frame)
2896 vnet_main_t *vnm = vnet_get_main ();
2897 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2898 ip6_radv_t *radv_info;
2899 vlib_frame_t *f = 0;
2900 u32 n_this_frame = 0;
2901 u32 n_left_to_next = 0;
2904 icmp6_router_solicitation_header_t *h0;
2906 f64 now = vlib_time_now (vm);
2908 /* Interface ip6 radv info list */
2910 pool_foreach (radv_info, nm->if_radv_pool,
2912 if( !vnet_sw_interface_is_admin_up (vnm, radv_info->sw_if_index))
2914 radv_info->initial_adverts_sent = radv_info->initial_adverts_count-1;
2915 radv_info->next_multicast_time = now;
2916 radv_info->last_multicast_time = now;
2917 radv_info->last_radv_time = 0;
2918 radv_info->all_routers_mcast = 0;
2922 /* Make sure that we've joined the all-routers multicast group */
2923 if(!radv_info->all_routers_mcast)
2925 /* send MDLP_REPORT_EVENT message */
2926 ip6_neighbor_send_mldpv2_report(radv_info->sw_if_index);
2927 radv_info->all_routers_mcast = 1;
2930 /* is it time to send a multicast RA on this interface? */
2931 if(radv_info->send_radv && (now >= radv_info->next_multicast_time))
2936 f64 rfn = (radv_info->max_radv_interval - radv_info->min_radv_interval) *
2937 random_f64 (&radv_info->seed) + radv_info->min_radv_interval;
2939 /* multicast send - compute next multicast send time */
2940 if( radv_info->initial_adverts_sent > 0)
2942 radv_info->initial_adverts_sent--;
2943 if(rfn > radv_info-> initial_adverts_interval)
2944 rfn = radv_info-> initial_adverts_interval;
2946 /* check to see if we are ceasing to send */
2947 if( radv_info->initial_adverts_sent == 0)
2948 if(radv_info->cease_radv)
2949 radv_info->send_radv = 0;
2952 radv_info->next_multicast_time = rfn + now;
2953 radv_info->last_multicast_time = now;
2955 /* send advert now - build a "solicted" router advert with unspecified source address */
2956 n_allocated = vlib_buffer_alloc_from_free_list
2957 (vm, &bo0, n_to_alloc, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2959 if (PREDICT_FALSE(n_allocated == 0))
2961 clib_warning ("buffer allocation failure");
2964 b0 = vlib_get_buffer (vm, bo0);
2965 b0->current_length = sizeof( icmp6_router_solicitation_header_t);
2966 b0->error = ICMP6_ERROR_NONE;
2967 vnet_buffer (b0)->sw_if_index[VLIB_RX] = radv_info->sw_if_index;
2969 h0 = vlib_buffer_get_current (b0);
2971 memset (h0, 0, sizeof (icmp6_router_solicitation_header_t));
2973 h0->ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2974 h0->ip.payload_length = clib_host_to_net_u16 (sizeof (icmp6_router_solicitation_header_t)
2975 - STRUCT_OFFSET_OF (icmp6_router_solicitation_header_t, neighbor));
2976 h0->ip.protocol = IP_PROTOCOL_ICMP6;
2977 h0->ip.hop_limit = 255;
2979 /* set src/dst address as "unspecified" this marks this packet as internally generated rather than recieved */
2980 h0->ip.src_address.as_u64[0] = 0;
2981 h0->ip.src_address.as_u64[1] = 0;
2983 h0->ip.dst_address.as_u64[0] = 0;
2984 h0->ip.dst_address.as_u64[1] = 0;
2986 h0->neighbor.icmp.type = ICMP6_router_solicitation;
2988 if (PREDICT_FALSE(f == 0))
2990 f = vlib_get_frame_to_node (vm, ip6_icmp_router_solicitation_node.index);
2991 to_next = vlib_frame_vector_args (f);
2992 n_left_to_next = VLIB_FRAME_SIZE;
3001 if (PREDICT_FALSE(n_left_to_next == 0))
3003 f->n_vectors = n_this_frame;
3004 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
3013 ASSERT (n_this_frame);
3014 f->n_vectors = n_this_frame;
3015 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
3021 ip6_icmp_neighbor_discovery_event_process (vlib_main_t * vm,
3022 vlib_node_runtime_t * node,
3023 vlib_frame_t * frame)
3026 ip6_icmp_neighbor_discovery_event_data_t *event_data;
3028 /* init code here */
3032 vlib_process_wait_for_event_or_clock (vm, 1. /* seconds */ );
3034 event_data = vlib_process_get_event_data (vm, &event_type);
3038 /* No events found: timer expired. */
3039 /* process interface list and send RAs as appropriate, update timer info */
3040 ip6_neighbor_process_timer_event (vm, node, frame);
3047 case ICMP6_ND_EVENT_INIT:
3058 _vec_len (event_data) = 0;
3061 return frame->n_vectors;
3065 VLIB_REGISTER_NODE (ip6_icmp_router_advertisement_node,static) =
3067 .function = icmp6_router_advertisement,
3068 .name = "icmp6-router-advertisement",
3070 .vector_size = sizeof (u32),
3072 .format_trace = format_icmp6_input_trace,
3081 vlib_node_registration_t ip6_icmp_neighbor_discovery_event_node = {
3083 .function = ip6_icmp_neighbor_discovery_event_process,
3084 .name = "ip6-icmp-neighbor-discovery-event-process",
3085 .type = VLIB_NODE_TYPE_PROCESS,
3089 icmp6_neighbor_solicitation (vlib_main_t * vm,
3090 vlib_node_runtime_t * node, vlib_frame_t * frame)
3092 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
3093 /* is_solicitation */
3098 icmp6_neighbor_advertisement (vlib_main_t * vm,
3099 vlib_node_runtime_t * node,
3100 vlib_frame_t * frame)
3102 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
3103 /* is_solicitation */
3108 VLIB_REGISTER_NODE (ip6_icmp_neighbor_solicitation_node,static) =
3110 .function = icmp6_neighbor_solicitation,
3111 .name = "icmp6-neighbor-solicitation",
3113 .vector_size = sizeof (u32),
3115 .format_trace = format_icmp6_input_trace,
3117 .n_next_nodes = ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
3119 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP] = "ip6-drop",
3120 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY] = "interface-output",
3126 VLIB_REGISTER_NODE (ip6_icmp_neighbor_advertisement_node,static) =
3128 .function = icmp6_neighbor_advertisement,
3129 .name = "icmp6-neighbor-advertisement",
3131 .vector_size = sizeof (u32),
3133 .format_trace = format_icmp6_input_trace,
3144 IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
3145 IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX,
3146 IP6_DISCOVER_NEIGHBOR_N_NEXT,
3147 } ip6_discover_neighbor_next_t;
3151 IP6_DISCOVER_NEIGHBOR_ERROR_DROP,
3152 IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT,
3153 IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS,
3154 } ip6_discover_neighbor_error_t;
3157 ip6_discover_neighbor_inline (vlib_main_t * vm,
3158 vlib_node_runtime_t * node,
3159 vlib_frame_t * frame, int is_glean)
3161 vnet_main_t *vnm = vnet_get_main ();
3162 ip6_main_t *im = &ip6_main;
3163 ip_lookup_main_t *lm = &im->lookup_main;
3164 u32 *from, *to_next_drop;
3165 uword n_left_from, n_left_to_next_drop;
3168 u32 thread_index = vm->thread_index;
3170 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3172 if (node->flags & VLIB_NODE_FLAG_TRACE)
3173 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
3175 time_now = vlib_time_now (vm);
3176 if (time_now - im->nd_throttle_last_seed_change_time[thread_index] > 1e-3)
3178 (void) random_u64 (&im->nd_throttle_seeds[thread_index]);
3179 memset (im->nd_throttle_bitmaps[thread_index], 0,
3180 ND_THROTTLE_BITS / BITS (u8));
3182 im->nd_throttle_last_seed_change_time[thread_index] = time_now;
3184 seed = im->nd_throttle_seeds[thread_index];
3186 from = vlib_frame_vector_args (frame);
3187 n_left_from = frame->n_vectors;
3189 while (n_left_from > 0)
3191 vlib_get_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
3192 to_next_drop, n_left_to_next_drop);
3194 while (n_left_from > 0 && n_left_to_next_drop > 0)
3198 u32 pi0, adj_index0, w0, sw_if_index0, drop0;
3201 ip_adjacency_t *adj0;
3202 vnet_hw_interface_t *hw_if0;
3203 ip6_radv_t *radv_info;
3208 p0 = vlib_get_buffer (vm, pi0);
3210 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
3212 ip0 = vlib_buffer_get_current (p0);
3214 adj0 = adj_get (adj_index0);
3218 ip0->dst_address.as_u64[0] =
3219 adj0->sub_type.nbr.next_hop.ip6.as_u64[0];
3220 ip0->dst_address.as_u64[1] =
3221 adj0->sub_type.nbr.next_hop.ip6.as_u64[1];
3224 sw_if_index0 = adj0->rewrite_header.sw_if_index;
3225 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
3227 /* Compute the ND throttle bitmap hash */
3228 r0 = ip0->dst_address.as_u64[0] ^ ip0->dst_address.as_u64[1] ^ seed;
3230 /* Find the word and bit */
3231 r0 &= ND_THROTTLE_BITS - 1;
3232 w0 = r0 / BITS (uword);
3233 m0 = (uword) 1 << (r0 % BITS (uword));
3235 /* If the bit is set, drop the ND request */
3236 drop0 = (im->nd_throttle_bitmaps[thread_index][w0] & m0) != 0;
3237 /* (unconditionally) mark the bit "inuse" */
3238 im->nd_throttle_bitmaps[thread_index][w0] |= m0;
3242 to_next_drop[0] = pi0;
3244 n_left_to_next_drop -= 1;
3246 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
3248 /* If the interface is link-down, drop the pkt */
3249 if (!(hw_if0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
3252 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) > sw_if_index0)
3254 u32 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
3257 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3265 * the adj has been updated to a rewrite but the node the DPO that got
3266 * us here hasn't - yet. no big deal. we'll drop while we wait.
3268 if (IP_LOOKUP_NEXT_REWRITE == adj0->lookup_next_index)
3272 node->errors[drop0 ? IP6_DISCOVER_NEIGHBOR_ERROR_DROP
3273 : IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT];
3280 icmp6_neighbor_solicitation_header_t *h0;
3283 h0 = vlib_packet_template_get_packet
3284 (vm, &im->discover_neighbor_packet_template, &bi0);
3289 * Build ethernet header.
3290 * Choose source address based on destination lookup
3293 if (!ip6_src_address_for_packet (lm,
3296 &h0->ip.src_address))
3298 /* There is no address on the interface */
3300 node->errors[IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS];
3301 vlib_buffer_free (vm, &bi0, 1);
3306 * Destination address is a solicited node multicast address.
3307 * We need to fill in
3308 * the low 24 bits with low 24 bits of target's address.
3310 h0->ip.dst_address.as_u8[13] = ip0->dst_address.as_u8[13];
3311 h0->ip.dst_address.as_u8[14] = ip0->dst_address.as_u8[14];
3312 h0->ip.dst_address.as_u8[15] = ip0->dst_address.as_u8[15];
3314 h0->neighbor.target_address = ip0->dst_address;
3316 clib_memcpy (h0->link_layer_option.ethernet_address,
3317 hw_if0->hw_address, vec_len (hw_if0->hw_address));
3319 /* $$$$ appears we need this; why is the checksum non-zero? */
3320 h0->neighbor.icmp.checksum = 0;
3321 h0->neighbor.icmp.checksum =
3322 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h0->ip,
3325 ASSERT (bogus_length == 0);
3327 vlib_buffer_copy_trace_flag (vm, p0, bi0);
3328 b0 = vlib_get_buffer (vm, bi0);
3329 vnet_buffer (b0)->sw_if_index[VLIB_TX]
3330 = vnet_buffer (p0)->sw_if_index[VLIB_TX];
3332 vnet_buffer (b0)->ip.adj_index[VLIB_TX] =
3333 radv_info->mcast_adj_index;
3335 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
3336 next0 = IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX;
3338 vlib_set_next_frame_buffer (vm, node, next0, bi0);
3342 vlib_put_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
3343 n_left_to_next_drop);
3346 return frame->n_vectors;
3350 ip6_discover_neighbor (vlib_main_t * vm,
3351 vlib_node_runtime_t * node, vlib_frame_t * frame)
3353 return (ip6_discover_neighbor_inline (vm, node, frame, 0));
3357 ip6_glean (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3359 return (ip6_discover_neighbor_inline (vm, node, frame, 1));
3362 static char *ip6_discover_neighbor_error_strings[] = {
3363 [IP6_DISCOVER_NEIGHBOR_ERROR_DROP] = "address overflow drops",
3364 [IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT] = "neighbor solicitations sent",
3365 [IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS]
3366 = "no source address for ND solicitation",
3370 VLIB_REGISTER_NODE (ip6_glean_node) =
3372 .function = ip6_glean,
3373 .name = "ip6-glean",
3374 .vector_size = sizeof (u32),
3375 .format_trace = format_ip6_forward_next_trace,
3376 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
3377 .error_strings = ip6_discover_neighbor_error_strings,
3378 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
3381 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "ip6-drop",
3382 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "ip6-rewrite-mcast",
3385 VLIB_REGISTER_NODE (ip6_discover_neighbor_node) =
3387 .function = ip6_discover_neighbor,
3388 .name = "ip6-discover-neighbor",
3389 .vector_size = sizeof (u32),
3390 .format_trace = format_ip6_forward_next_trace,
3391 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
3392 .error_strings = ip6_discover_neighbor_error_strings,
3393 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
3396 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "ip6-drop",
3397 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "ip6-rewrite-mcast",
3402 /* API support functions */
3404 ip6_neighbor_ra_config (vlib_main_t * vm, u32 sw_if_index,
3405 u8 suppress, u8 managed, u8 other,
3406 u8 ll_option, u8 send_unicast, u8 cease,
3407 u8 use_lifetime, u32 lifetime,
3408 u32 initial_count, u32 initial_interval,
3409 u32 max_interval, u32 min_interval, u8 is_no)
3411 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3415 /* look up the radv_t information for this interface */
3416 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3418 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3419 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
3424 ip6_radv_t *radv_info;
3425 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3427 if ((max_interval != 0) && (min_interval == 0))
3428 min_interval = .75 * max_interval;
3432 0) ? ((is_no) ? DEF_MAX_RADV_INTERVAL : max_interval) :
3433 radv_info->max_radv_interval;
3436 0) ? ((is_no) ? DEF_MIN_RADV_INTERVAL : min_interval) :
3437 radv_info->min_radv_interval;
3440 0) ? ((is_no) ? DEF_DEF_RTR_LIFETIME : lifetime) :
3441 radv_info->adv_router_lifetime_in_sec;
3445 if (lifetime > MAX_DEF_RTR_LIFETIME)
3446 lifetime = MAX_DEF_RTR_LIFETIME;
3448 if (lifetime <= max_interval)
3449 return VNET_API_ERROR_INVALID_VALUE;
3452 if (min_interval != 0)
3454 if ((min_interval > .75 * max_interval) || (min_interval < 3))
3455 return VNET_API_ERROR_INVALID_VALUE;
3458 if ((initial_count > MAX_INITIAL_RTR_ADVERTISEMENTS) ||
3459 (initial_interval > MAX_INITIAL_RTR_ADVERT_INTERVAL))
3460 return VNET_API_ERROR_INVALID_VALUE;
3463 if "flag" is set and is_no is true then restore default value else set value corresponding to "flag"
3464 if "flag" is clear don't change corresponding value
3466 radv_info->send_radv =
3467 (suppress != 0) ? ((is_no != 0) ? 1 : 0) : radv_info->send_radv;
3468 radv_info->adv_managed_flag =
3469 (managed != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_managed_flag;
3470 radv_info->adv_other_flag =
3471 (other != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_other_flag;
3472 radv_info->adv_link_layer_address =
3474 0) ? ((is_no) ? 1 : 0) : radv_info->adv_link_layer_address;
3475 radv_info->send_unicast =
3476 (send_unicast != 0) ? ((is_no) ? 0 : 1) : radv_info->send_unicast;
3477 radv_info->cease_radv =
3478 (cease != 0) ? ((is_no) ? 0 : 1) : radv_info->cease_radv;
3480 radv_info->min_radv_interval = min_interval;
3481 radv_info->max_radv_interval = max_interval;
3482 radv_info->adv_router_lifetime_in_sec = lifetime;
3484 radv_info->initial_adverts_count =
3486 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERTISEMENTS : initial_count) :
3487 radv_info->initial_adverts_count;
3488 radv_info->initial_adverts_interval =
3489 (initial_interval !=
3490 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERT_INTERVAL : initial_interval) :
3491 radv_info->initial_adverts_interval;
3494 if ((cease != 0) && (is_no))
3495 radv_info->send_radv = 1;
3497 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
3498 radv_info->next_multicast_time = vlib_time_now (vm);
3499 radv_info->last_multicast_time = vlib_time_now (vm);
3500 radv_info->last_radv_time = 0;
3506 ip6_neighbor_ra_prefix (vlib_main_t * vm, u32 sw_if_index,
3507 ip6_address_t * prefix_addr, u8 prefix_len,
3508 u8 use_default, u32 val_lifetime, u32 pref_lifetime,
3509 u8 no_advertise, u8 off_link, u8 no_autoconfig,
3510 u8 no_onlink, u8 is_no)
3512 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3517 /* look up the radv_t information for this interface */
3518 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3521 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3523 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
3527 f64 now = vlib_time_now (vm);
3528 ip6_radv_t *radv_info;
3529 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3531 /* prefix info add, delete or update */
3532 ip6_radv_prefix_t *prefix;
3534 /* lookup prefix info for this address on this interface */
3535 uword *p = mhash_get (&radv_info->address_to_prefix_index, prefix_addr);
3537 prefix = p ? pool_elt_at_index (radv_info->adv_prefixes_pool, p[0]) : 0;
3543 return VNET_API_ERROR_INVALID_VALUE; /* invalid prefix */
3545 if (prefix->prefix_len != prefix_len)
3546 return VNET_API_ERROR_INVALID_VALUE_2;
3548 /* FIXME - Should the DP do this or the CP ? */
3549 /* do specific delete processing here before returning */
3550 /* try to remove from routing table */
3552 mhash_unset (&radv_info->address_to_prefix_index, prefix_addr,
3554 pool_put (radv_info->adv_prefixes_pool, prefix);
3556 radv_info->initial_adverts_sent =
3557 radv_info->initial_adverts_count - 1;
3558 radv_info->next_multicast_time = vlib_time_now (vm);
3559 radv_info->last_multicast_time = vlib_time_now (vm);
3560 radv_info->last_radv_time = 0;
3564 /* adding or changing */
3569 pool_get (radv_info->adv_prefixes_pool, prefix);
3570 pi = prefix - radv_info->adv_prefixes_pool;
3571 mhash_set (&radv_info->address_to_prefix_index, prefix_addr, pi,
3574 memset (prefix, 0x0, sizeof (ip6_radv_prefix_t));
3576 prefix->prefix_len = prefix_len;
3577 clib_memcpy (&prefix->prefix, prefix_addr, sizeof (ip6_address_t));
3579 /* initialize default values */
3580 prefix->adv_on_link_flag = 1; /* L bit set */
3581 prefix->adv_autonomous_flag = 1; /* A bit set */
3582 prefix->adv_valid_lifetime_in_secs = DEF_ADV_VALID_LIFETIME;
3583 prefix->adv_pref_lifetime_in_secs = DEF_ADV_PREF_LIFETIME;
3584 prefix->enabled = 1;
3585 prefix->decrement_lifetime_flag = 1;
3586 prefix->deprecated_prefix_flag = 1;
3590 /* FIXME - Should the DP do this or the CP ? */
3591 /* insert prefix into routing table as a connected prefix */
3600 if (prefix->prefix_len != prefix_len)
3601 return VNET_API_ERROR_INVALID_VALUE_2;
3605 /* FIXME - Should the DP do this or the CP ? */
3606 /* remove from routing table if already there */
3610 if ((val_lifetime == ~0) || (pref_lifetime == ~0))
3612 prefix->adv_valid_lifetime_in_secs = ~0;
3613 prefix->adv_pref_lifetime_in_secs = ~0;
3614 prefix->decrement_lifetime_flag = 0;
3618 prefix->adv_valid_lifetime_in_secs = val_lifetime;;
3619 prefix->adv_pref_lifetime_in_secs = pref_lifetime;
3622 /* copy remaining */
3623 prefix->enabled = !(no_advertise != 0);
3624 prefix->adv_on_link_flag = !((off_link != 0) || (no_onlink != 0));
3625 prefix->adv_autonomous_flag = !(no_autoconfig != 0);
3629 /* fill in the expiration times */
3630 prefix->valid_lifetime_expires =
3631 now + prefix->adv_valid_lifetime_in_secs;
3632 prefix->pref_lifetime_expires = now + prefix->adv_pref_lifetime_in_secs;
3634 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
3635 radv_info->next_multicast_time = vlib_time_now (vm);
3636 radv_info->last_multicast_time = vlib_time_now (vm);
3637 radv_info->last_radv_time = 0;
3643 ip6_neighbor_cmd (vlib_main_t * vm, unformat_input_t * main_input,
3644 vlib_cli_command_t * cmd)
3646 vnet_main_t *vnm = vnet_get_main ();
3647 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3648 clib_error_t *error = 0;
3650 u8 suppress = 0, managed = 0, other = 0;
3651 u8 suppress_ll_option = 0, send_unicast = 0, cease = 0;
3652 u8 use_lifetime = 0;
3653 u32 sw_if_index, ra_lifetime = 0, ra_initial_count =
3654 0, ra_initial_interval = 0;
3655 u32 ra_max_interval = 0, ra_min_interval = 0;
3657 unformat_input_t _line_input, *line_input = &_line_input;
3658 vnet_sw_interface_t *sw_if0;
3660 int add_radv_info = 1;
3661 __attribute__ ((unused)) ip6_radv_t *radv_info = 0;
3662 ip6_address_t ip6_addr;
3666 /* Get a line of input. */
3667 if (!unformat_user (main_input, unformat_line_input, line_input))
3670 /* get basic radv info for this interface */
3671 if (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3674 if (unformat_user (line_input,
3675 unformat_vnet_sw_interface, vnm, &sw_if_index))
3678 ethernet_interface_t *eth_if0 = 0;
3680 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
3681 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
3683 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
3688 clib_error_return (0, "Interface must be of ethernet type");
3692 /* look up the radv_t information for this interface */
3693 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3696 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3700 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3704 error = clib_error_return (0, "unknown interface %U'",
3705 format_unformat_error, line_input);
3711 error = clib_error_return (0, "invalid interface name %U'",
3712 format_unformat_error, line_input);
3717 /* get the rest of the command */
3718 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3720 if (unformat (line_input, "no"))
3722 else if (unformat (line_input, "prefix %U/%d",
3723 unformat_ip6_address, &ip6_addr, &addr_len))
3728 else if (unformat (line_input, "ra-managed-config-flag"))
3733 else if (unformat (line_input, "ra-other-config-flag"))
3738 else if (unformat (line_input, "ra-suppress") ||
3739 unformat (line_input, "ra-surpress"))
3744 else if (unformat (line_input, "ra-suppress-link-layer") ||
3745 unformat (line_input, "ra-surpress-link-layer"))
3747 suppress_ll_option = 1;
3750 else if (unformat (line_input, "ra-send-unicast"))
3755 else if (unformat (line_input, "ra-lifetime"))
3757 if (!unformat (line_input, "%d", &ra_lifetime))
3759 error = unformat_parse_error (line_input);
3765 else if (unformat (line_input, "ra-initial"))
3768 (line_input, "%d %d", &ra_initial_count, &ra_initial_interval))
3770 error = unformat_parse_error (line_input);
3775 else if (unformat (line_input, "ra-interval"))
3777 if (!unformat (line_input, "%d", &ra_max_interval))
3779 error = unformat_parse_error (line_input);
3783 if (!unformat (line_input, "%d", &ra_min_interval))
3784 ra_min_interval = 0;
3787 else if (unformat (line_input, "ra-cease"))
3794 error = unformat_parse_error (line_input);
3801 ip6_neighbor_ra_config (vm, sw_if_index,
3802 suppress, managed, other,
3803 suppress_ll_option, send_unicast, cease,
3804 use_lifetime, ra_lifetime,
3805 ra_initial_count, ra_initial_interval,
3806 ra_max_interval, ra_min_interval, is_no);
3810 u32 valid_lifetime_in_secs = 0;
3811 u32 pref_lifetime_in_secs = 0;
3812 u8 use_prefix_default_values = 0;
3813 u8 no_advertise = 0;
3815 u8 no_autoconfig = 0;
3818 /* get the rest of the command */
3819 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3821 if (unformat (line_input, "default"))
3823 use_prefix_default_values = 1;
3826 else if (unformat (line_input, "infinite"))
3828 valid_lifetime_in_secs = ~0;
3829 pref_lifetime_in_secs = ~0;
3832 else if (unformat (line_input, "%d %d", &valid_lifetime_in_secs,
3833 &pref_lifetime_in_secs))
3840 /* get the rest of the command */
3841 while (!use_prefix_default_values &&
3842 unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3844 if (unformat (line_input, "no-advertise"))
3846 else if (unformat (line_input, "off-link"))
3848 else if (unformat (line_input, "no-autoconfig"))
3850 else if (unformat (line_input, "no-onlink"))
3854 error = unformat_parse_error (line_input);
3859 ip6_neighbor_ra_prefix (vm, sw_if_index,
3860 &ip6_addr, addr_len,
3861 use_prefix_default_values,
3862 valid_lifetime_in_secs,
3863 pref_lifetime_in_secs,
3865 off_link, no_autoconfig, no_onlink, is_no);
3869 unformat_free (line_input);
3875 ip6_print_addrs (vlib_main_t * vm, u32 * addrs)
3877 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3880 for (i = 0; i < vec_len (addrs); i++)
3882 ip_interface_address_t *a =
3883 pool_elt_at_index (lm->if_address_pool, addrs[i]);
3884 ip6_address_t *address = ip_interface_address_get_address (lm, a);
3886 vlib_cli_output (vm, "\t\t%U/%d",
3887 format_ip6_address, address, a->address_length);
3891 static clib_error_t *
3892 show_ip6_interface_cmd (vlib_main_t * vm,
3893 unformat_input_t * input, vlib_cli_command_t * cmd)
3895 vnet_main_t *vnm = vnet_get_main ();
3896 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3897 clib_error_t *error = 0;
3902 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3906 /* look up the radv_t information for this interface */
3907 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3910 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3914 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3915 ip6_radv_t *radv_info;
3916 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3918 vlib_cli_output (vm, "%U is admin %s\n",
3919 format_vnet_sw_interface_name, vnm,
3920 vnet_get_sw_interface (vnm, sw_if_index),
3921 (vnet_sw_interface_is_admin_up (vnm, sw_if_index) ?
3925 u32 *link_scope = 0, *global_scope = 0;
3926 u32 *local_scope = 0, *unknown_scope = 0;
3927 ip_interface_address_t *a;
3929 vec_validate_init_empty (lm->if_address_pool_index_by_sw_if_index,
3931 ai = lm->if_address_pool_index_by_sw_if_index[sw_if_index];
3933 while (ai != (u32) ~ 0)
3935 a = pool_elt_at_index (lm->if_address_pool, ai);
3936 ip6_address_t *address =
3937 ip_interface_address_get_address (lm, a);
3939 if (ip6_address_is_link_local_unicast (address))
3940 vec_add1 (link_scope, ai);
3941 else if (ip6_address_is_global_unicast (address))
3942 vec_add1 (global_scope, ai);
3943 else if (ip6_address_is_local_unicast (address))
3944 vec_add1 (local_scope, ai);
3946 vec_add1 (unknown_scope, ai);
3948 ai = a->next_this_sw_interface;
3951 if (vec_len (link_scope))
3953 vlib_cli_output (vm, "\tLink-local address(es):\n");
3954 ip6_print_addrs (vm, link_scope);
3955 vec_free (link_scope);
3958 if (vec_len (local_scope))
3960 vlib_cli_output (vm, "\tLocal unicast address(es):\n");
3961 ip6_print_addrs (vm, local_scope);
3962 vec_free (local_scope);
3965 if (vec_len (global_scope))
3967 vlib_cli_output (vm, "\tGlobal unicast address(es):\n");
3968 ip6_print_addrs (vm, global_scope);
3969 vec_free (global_scope);
3972 if (vec_len (unknown_scope))
3974 vlib_cli_output (vm, "\tOther-scope address(es):\n");
3975 ip6_print_addrs (vm, unknown_scope);
3976 vec_free (unknown_scope);
3979 vlib_cli_output (vm, "\tLink-local address(es):\n");
3980 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
3981 &radv_info->link_local_address);
3983 vlib_cli_output (vm, "\tJoined group address(es):\n");
3984 ip6_mldp_group_t *m;
3986 pool_foreach (m, radv_info->mldp_group_pool,
3988 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
3993 vlib_cli_output (vm, "\tAdvertised Prefixes:\n");
3994 ip6_radv_prefix_t *p;
3996 pool_foreach (p, radv_info->adv_prefixes_pool,
3998 vlib_cli_output (vm, "\t\tprefix %U, length %d\n",
3999 format_ip6_address, &p->prefix, p->prefix_len);
4003 vlib_cli_output (vm, "\tMTU is %d\n", radv_info->adv_link_mtu);
4004 vlib_cli_output (vm, "\tICMP error messages are unlimited\n");
4005 vlib_cli_output (vm, "\tICMP redirects are disabled\n");
4006 vlib_cli_output (vm, "\tICMP unreachables are not sent\n");
4007 vlib_cli_output (vm, "\tND DAD is disabled\n");
4008 //vlib_cli_output (vm, "\tND reachable time is %d milliseconds\n",);
4009 vlib_cli_output (vm, "\tND advertised reachable time is %d\n",
4010 radv_info->adv_neighbor_reachable_time_in_msec);
4011 vlib_cli_output (vm,
4012 "\tND advertised retransmit interval is %d (msec)\n",
4014 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
4016 u32 ra_interval = radv_info->max_radv_interval;
4017 u32 ra_interval_min = radv_info->min_radv_interval;
4018 vlib_cli_output (vm,
4019 "\tND router advertisements are sent every %d seconds (min interval is %d)\n",
4020 ra_interval, ra_interval_min);
4021 vlib_cli_output (vm,
4022 "\tND router advertisements live for %d seconds\n",
4023 radv_info->adv_router_lifetime_in_sec);
4024 vlib_cli_output (vm,
4025 "\tHosts %s stateless autoconfig for addresses\n",
4026 (radv_info->adv_managed_flag) ? "use" :
4028 vlib_cli_output (vm, "\tND router advertisements sent %d\n",
4029 radv_info->n_advertisements_sent);
4030 vlib_cli_output (vm, "\tND router solicitations received %d\n",
4031 radv_info->n_solicitations_rcvd);
4032 vlib_cli_output (vm, "\tND router solicitations dropped %d\n",
4033 radv_info->n_solicitations_dropped);
4037 error = clib_error_return (0, "IPv6 not enabled on interface",
4038 format_unformat_error, input);
4046 * This command is used to display various IPv6 attributes on a given
4050 * Example of how to display IPv6 settings:
4051 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
4052 * GigabitEthernet2/0/0 is admin up
4053 * Link-local address(es):
4055 * Joined group address(es):
4060 * Advertised Prefixes:
4061 * prefix fe80::fe:28ff:fe9c:75b3, length 64
4063 * ICMP error messages are unlimited
4064 * ICMP redirects are disabled
4065 * ICMP unreachables are not sent
4066 * ND DAD is disabled
4067 * ND advertised reachable time is 0
4068 * ND advertised retransmit interval is 0 (msec)
4069 * ND router advertisements are sent every 200 seconds (min interval is 150)
4070 * ND router advertisements live for 600 seconds
4071 * Hosts use stateless autoconfig for addresses
4072 * ND router advertisements sent 19336
4073 * ND router solicitations received 0
4074 * ND router solicitations dropped 0
4076 * Example of output if IPv6 is not enabled on the interface:
4077 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
4078 * show ip6 interface: IPv6 not enabled on interface
4082 VLIB_CLI_COMMAND (show_ip6_interface_command, static) =
4084 .path = "show ip6 interface",
4085 .function = show_ip6_interface_cmd,
4086 .short_help = "show ip6 interface <interface>",
4091 disable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
4093 clib_error_t *error = 0;
4094 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4097 /* look up the radv_t information for this interface */
4098 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
4100 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4102 /* if not created - do nothing */
4105 ip6_radv_t *radv_info;
4107 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4109 /* check radv_info ref count for other ip6 addresses on this interface */
4110 /* This implicitly excludes the link local address */
4111 if (radv_info->ref_count == 0)
4113 /* essentially "disables" ipv6 on this interface */
4114 ip6_ll_prefix_t ilp = {
4115 .ilp_addr = radv_info->link_local_address,
4116 .ilp_sw_if_index = sw_if_index,
4118 ip6_ll_table_entry_delete (&ilp);
4119 ip6_sw_interface_enable_disable (sw_if_index, 0);
4120 ip6_mfib_interface_enable_disable (sw_if_index, 0);
4121 ip6_neighbor_sw_interface_add_del (vnet_get_main (), sw_if_index,
4129 ip6_interface_enabled (vlib_main_t * vm, u32 sw_if_index)
4131 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4134 /* look up the radv_t information for this interface */
4135 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
4138 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4144 enable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
4146 clib_error_t *error = 0;
4147 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4151 /* look up the radv_t information for this interface */
4152 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
4155 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4157 /* if not created yet */
4160 vnet_main_t *vnm = vnet_get_main ();
4161 vnet_sw_interface_t *sw_if0;
4163 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
4164 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
4166 ethernet_interface_t *eth_if0;
4169 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
4172 /* create radv_info. for this interface. This holds all the info needed for router adverts */
4174 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, is_add);
4178 ip6_radv_t *radv_info;
4179 ip6_address_t link_local_address;
4181 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4183 ip6_link_local_address_from_ethernet_mac_address
4184 (&link_local_address, eth_if0->address);
4186 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index);
4187 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_SUB ||
4188 sw_if0->type == VNET_SW_INTERFACE_TYPE_PIPE ||
4189 sw_if0->type == VNET_SW_INTERFACE_TYPE_P2P)
4191 /* make up an interface id */
4192 link_local_address.as_u64[1] =
4193 random_u64 (&radv_info->randomizer);
4195 link_local_address.as_u64[0] =
4196 clib_host_to_net_u64 (0xFE80000000000000ULL);
4198 link_local_address.as_u8[8] &= 0xfd;
4201 ip6_ll_prefix_t ilp = {
4202 .ilp_addr = link_local_address,
4203 .ilp_sw_if_index = sw_if_index,
4206 ip6_ll_table_entry_update (&ilp, FIB_ROUTE_PATH_LOCAL);
4209 /* essentially "enables" ipv6 on this interface */
4210 ip6_mfib_interface_enable_disable (sw_if_index, 1);
4211 ip6_sw_interface_enable_disable (sw_if_index, 1);
4215 radv_info->link_local_address = link_local_address;
4225 ip6_get_ll_address (u32 sw_if_index, ip6_address_t * addr)
4227 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4228 ip6_radv_t *radv_info;
4231 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) <= sw_if_index)
4234 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4239 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4240 *addr = radv_info->link_local_address;
4245 static clib_error_t *
4246 enable_ip6_interface_cmd (vlib_main_t * vm,
4247 unformat_input_t * input, vlib_cli_command_t * cmd)
4249 vnet_main_t *vnm = vnet_get_main ();
4250 clib_error_t *error = 0;
4255 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4257 enable_ip6_interface (vm, sw_if_index);
4261 error = clib_error_return (0, "unknown interface\n'",
4262 format_unformat_error, input);
4269 * This command is used to enable IPv6 on a given interface.
4272 * Example of how enable IPv6 on a given interface:
4273 * @cliexcmd{enable ip6 interface GigabitEthernet2/0/0}
4276 VLIB_CLI_COMMAND (enable_ip6_interface_command, static) =
4278 .path = "enable ip6 interface",
4279 .function = enable_ip6_interface_cmd,
4280 .short_help = "enable ip6 interface <interface>",
4284 static clib_error_t *
4285 disable_ip6_interface_cmd (vlib_main_t * vm,
4286 unformat_input_t * input, vlib_cli_command_t * cmd)
4288 vnet_main_t *vnm = vnet_get_main ();
4289 clib_error_t *error = 0;
4294 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4296 error = disable_ip6_interface (vm, sw_if_index);
4300 error = clib_error_return (0, "unknown interface\n'",
4301 format_unformat_error, input);
4308 * This command is used to disable IPv6 on a given interface.
4311 * Example of how disable IPv6 on a given interface:
4312 * @cliexcmd{disable ip6 interface GigabitEthernet2/0/0}
4315 VLIB_CLI_COMMAND (disable_ip6_interface_command, static) =
4317 .path = "disable ip6 interface",
4318 .function = disable_ip6_interface_cmd,
4319 .short_help = "disable ip6 interface <interface>",
4324 * This command is used to configure the neighbor discovery
4325 * parameters on a given interface. Use the '<em>show ip6 interface</em>'
4326 * command to display some of the current neighbor discovery parameters
4327 * on a given interface. This command has three formats:
4330 * <b>Format 1 - Router Advertisement Options:</b> (Only one can be entered in a single command)
4332 * '<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>'
4336 * <em>[no] ra-managed-config-flag</em> - Advertises in ICMPv6
4337 * router-advertisement messages to use stateful address
4338 * auto-configuration to obtain address information (sets the M-bit).
4339 * Default is the M-bit is not set and the '<em>no</em>' option
4340 * returns it to this default state.
4342 * <em>[no] ra-other-config-flag</em> - Indicates in ICMPv6
4343 * router-advertisement messages that hosts use stateful auto
4344 * configuration to obtain nonaddress related information (sets
4345 * the O-bit). Default is the O-bit is not set and the '<em>no</em>'
4346 * option returns it to this default state.
4348 * <em>[no] ra-suppress</em> - Disables sending ICMPv6 router-advertisement
4349 * messages. The '<em>no</em>' option implies to enable sending ICMPv6
4350 * router-advertisement messages.
4352 * <em>[no] ra-suppress-link-layer</em> - Indicates not to include the
4353 * optional source link-layer address in the ICMPv6 router-advertisement
4354 * messages. Default is to include the optional source link-layer address
4355 * and the '<em>no</em>' option returns it to this default state.
4357 * <em>[no] ra-send-unicast</em> - Use the source address of the
4358 * router-solicitation message if availiable. The default is to use
4359 * multicast address of all nodes, and the '<em>no</em>' option returns
4360 * it to this default state.
4362 * <em>[no] ra-lifetime <lifetime></em> - Advertises the lifetime of a
4363 * default router in ICMPv6 router-advertisement messages. The range is
4364 * from 0 to 9000 seconds. '<em><lifetime></em>' must be greater than
4365 * '<em><max-interval></em>'. The default value is 600 seconds and the
4366 * '<em>no</em>' option returns it to this default value.
4368 * <em>[no] ra-initial <cnt> <interval></em> - Number of initial ICMPv6
4369 * router-advertisement messages sent and the interval between each
4370 * message. Range for count is 1 - 3 and default is 3. Range for interval
4371 * is 1 to 16 seconds, and default is 16 seconds. The '<em>no</em>' option
4372 * returns both to their default value.
4374 * <em>[no] ra-interval <max-interval> [<min-interval>]</em> - Configures the
4375 * interval between sending ICMPv6 router-advertisement messages. The
4376 * range for max-interval is from 4 to 200 seconds. min-interval can not
4377 * be more than 75% of max-interval. If not set, min-interval will be
4378 * set to 75% of max-interval. The range for min-interval is from 3 to
4379 * 150 seconds. The '<em>no</em>' option returns both to their default
4382 * <em>[no] ra-cease</em> - Cease sending ICMPv6 router-advertisement messages.
4383 * The '<em>no</em>' options implies to start (or restart) sending
4384 * ICMPv6 router-advertisement messages.
4387 * <b>Format 2 - Prefix Options:</b>
4389 * '<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>'
4393 * <em>no</em> - All additional flags are ignored and the prefix is deleted.
4395 * <em><valid-lifetime> <pref-lifetime></em> - '<em><valid-lifetime></em>' is the
4396 * length of time in seconds during what the prefix is valid for the purpose of
4397 * on-link determination. Range is 7203 to 2592000 seconds and default is 2592000
4398 * seconds (30 days). '<em><pref-lifetime></em>' is the prefered-lifetime and is the
4399 * length of time in seconds during what addresses generated from the prefix remain
4400 * preferred. Range is 0 to 604800 seconds and default is 604800 seconds (7 days).
4402 * <em>infinite</em> - Both '<em><valid-lifetime></em>' and '<em><<pref-lifetime></em>'
4403 * are inifinte, no timeout.
4405 * <em>no-advertise</em> - Do not send full router address in prefix
4406 * advertisement. Default is to advertise (i.e. - This flag is off by default).
4408 * <em>off-link</em> - Prefix is off-link, clear L-bit in packet. Default is on-link
4409 * (i.e. - This flag is off and L-bit in packet is set by default and this prefix can
4410 * be used for on-link determination). '<em>no-onlink</em>' also controls the L-bit.
4412 * <em>no-autoconfig</em> - Do not use prefix for autoconfiguration, clear A-bit in packet.
4413 * Default is autoconfig (i.e. - This flag is off and A-bit in packet is set by default.
4415 * <em>no-onlink</em> - Do not use prefix for onlink determination, clear L-bit in packet.
4416 * Default is on-link (i.e. - This flag is off and L-bit in packet is set by default and
4417 * this prefix can be used for on-link determination). '<em>off-link</em>' also controls
4421 * <b>Format 3: - Default of Prefix:</b>
4423 * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> default</b></em>'
4425 * When a new prefix is added (or existing one is being overwritten) <em>default</em>
4426 * uses default values for the prefix. If <em>no</em> is used, the <em>default</em>
4427 * is ignored and the prefix is deleted.
4431 * Example of how set a router advertisement option:
4432 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 ra-interval 100 20}
4433 * Example of how to add a prefix:
4434 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 prefix fe80::fe:28ff:fe9c:75b3/64 infinite no-advertise}
4435 * Example of how to delete a prefix:
4436 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 no prefix fe80::fe:28ff:fe9c:75b3/64}
4439 VLIB_CLI_COMMAND (ip6_nd_command, static) =
4442 .short_help = "ip6 nd <interface> ...",
4443 .function = ip6_neighbor_cmd,
4448 set_ip6_link_local_address (vlib_main_t * vm,
4449 u32 sw_if_index, ip6_address_t * address)
4451 clib_error_t *error = 0;
4452 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4454 ip6_radv_t *radv_info;
4455 vnet_main_t *vnm = vnet_get_main ();
4457 if (!ip6_address_is_link_local_unicast (address))
4459 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_LINK_LOCAL;
4460 return (error = clib_error_return (0, "address not link-local",
4461 format_unformat_error));
4464 /* call enable ipv6 */
4465 enable_ip6_interface (vm, sw_if_index);
4467 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4471 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4473 /* save if link local address (overwrite default) */
4475 /* delete the old one */
4476 error = ip6_add_del_interface_address (vm, sw_if_index,
4477 &radv_info->link_local_address,
4478 128, 1 /* is_del */ );
4482 /* add the new one */
4483 error = ip6_add_del_interface_address (vm, sw_if_index,
4489 radv_info->link_local_address = *address;
4495 vnm->api_errno = VNET_API_ERROR_IP6_NOT_ENABLED;
4496 error = clib_error_return (0, "ip6 not enabled for interface",
4497 format_unformat_error);
4503 set_ip6_link_local_address_cmd (vlib_main_t * vm,
4504 unformat_input_t * input,
4505 vlib_cli_command_t * cmd)
4507 vnet_main_t *vnm = vnet_get_main ();
4508 clib_error_t *error = 0;
4510 ip6_address_t ip6_addr;
4512 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4514 /* get the rest of the command */
4515 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
4517 if (unformat (input, "%U", unformat_ip6_address, &ip6_addr))
4520 return (unformat_parse_error (input));
4523 error = set_ip6_link_local_address (vm, sw_if_index, &ip6_addr);
4528 * This command is used to assign an IPv6 Link-local address to an
4529 * interface. This command will enable IPv6 on an interface if it
4530 * is not already enabled. Use the '<em>show ip6 interface</em>' command
4531 * to display the assigned Link-local address.
4534 * Example of how to assign an IPv6 Link-local address to an interface:
4535 * @cliexcmd{set ip6 link-local address GigabitEthernet2/0/0 FE80::AB8}
4538 VLIB_CLI_COMMAND (set_ip6_link_local_address_command, static) =
4540 .path = "set ip6 link-local address",
4541 .short_help = "set ip6 link-local address <interface> <ip6-address>",
4542 .function = set_ip6_link_local_address_cmd,
4547 * @brief callback when an interface address is added or deleted
4550 ip6_neighbor_add_del_interface_address (ip6_main_t * im,
4553 ip6_address_t * address,
4555 u32 if_address_index, u32 is_delete)
4557 vnet_main_t *vnm = vnet_get_main ();
4558 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4560 vlib_main_t *vm = vnm->vlib_main;
4561 ip6_radv_t *radv_info;
4564 /* create solicited node multicast address for this interface adddress */
4565 ip6_set_solicited_node_multicast_address (&a, 0);
4567 a.as_u8[0xd] = address->as_u8[0xd];
4568 a.as_u8[0xe] = address->as_u8[0xe];
4569 a.as_u8[0xf] = address->as_u8[0xf];
4573 /* try to create radv_info - does nothing if ipv6 already enabled */
4574 enable_ip6_interface (vm, sw_if_index);
4576 /* look up the radv_t information for this interface */
4577 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
4579 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4583 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4586 if (!ip6_address_is_link_local_unicast (address))
4587 radv_info->ref_count++;
4589 ip6_neighbor_add_mld_prefix (radv_info, &a);
4596 /* look up the radv_t information for this interface */
4597 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
4599 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4604 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4606 ip6_neighbor_del_mld_prefix (radv_info, &a);
4608 /* if interface up send MLDP "report" */
4609 radv_info->all_routers_mcast = 0;
4612 if (!ip6_address_is_link_local_unicast (address))
4613 radv_info->ref_count--;
4615 /* Ensure that IPv6 is disabled, and LL removed after ref_count reaches 0 */
4616 disable_ip6_interface (vm, sw_if_index);
4621 ip6_set_neighbor_limit (u32 neighbor_limit)
4623 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4625 nm->limit_neighbor_cache_size = neighbor_limit;
4630 ip6_neighbor_table_bind (ip6_main_t * im,
4633 u32 new_fib_index, u32 old_fib_index)
4635 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4636 ip6_neighbor_t *n = NULL;
4637 u32 i, *to_re_add = 0;
4640 pool_foreach (n, nm->neighbor_pool,
4642 if (n->key.sw_if_index == sw_if_index)
4643 vec_add1 (to_re_add, n - nm->neighbor_pool);
4647 for (i = 0; i < vec_len (to_re_add); i++)
4649 n = pool_elt_at_index (nm->neighbor_pool, to_re_add[i]);
4650 ip6_neighbor_adj_fib_remove (n, old_fib_index);
4651 ip6_neighbor_adj_fib_add (n, new_fib_index);
4653 vec_free (to_re_add);
4656 static clib_error_t *
4657 ip6_neighbor_init (vlib_main_t * vm)
4659 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4660 ip6_main_t *im = &ip6_main;
4662 mhash_init (&nm->neighbor_index_by_key,
4663 /* value size */ sizeof (uword),
4664 /* key size */ sizeof (ip6_neighbor_key_t));
4666 icmp6_register_type (vm, ICMP6_neighbor_solicitation,
4667 ip6_icmp_neighbor_solicitation_node.index);
4668 icmp6_register_type (vm, ICMP6_neighbor_advertisement,
4669 ip6_icmp_neighbor_advertisement_node.index);
4670 icmp6_register_type (vm, ICMP6_router_solicitation,
4671 ip6_icmp_router_solicitation_node.index);
4672 icmp6_register_type (vm, ICMP6_router_advertisement,
4673 ip6_icmp_router_advertisement_node.index);
4675 /* handler node for ip6 neighbor discovery events and timers */
4676 vlib_register_node (vm, &ip6_icmp_neighbor_discovery_event_node);
4678 /* add call backs */
4679 ip6_add_del_interface_address_callback_t cb;
4680 memset (&cb, 0x0, sizeof (ip6_add_del_interface_address_callback_t));
4682 /* when an interface address changes... */
4683 cb.function = ip6_neighbor_add_del_interface_address;
4684 cb.function_opaque = 0;
4685 vec_add1 (im->add_del_interface_address_callbacks, cb);
4687 ip6_table_bind_callback_t cbt;
4688 cbt.function = ip6_neighbor_table_bind;
4689 cbt.function_opaque = 0;
4690 vec_add1 (im->table_bind_callbacks, cbt);
4692 mhash_init (&nm->pending_resolutions_by_address,
4693 /* value size */ sizeof (uword),
4694 /* key size */ sizeof (ip6_address_t));
4696 mhash_init (&nm->mac_changes_by_address,
4697 /* value size */ sizeof (uword),
4698 /* key size */ sizeof (ip6_address_t));
4700 /* default, configurable */
4701 nm->limit_neighbor_cache_size = 50000;
4703 nm->wc_ip6_nd_publisher_node = (uword) ~ 0;
4705 nm->ip6_ra_publisher_node = (uword) ~ 0;
4708 /* $$$$ Hack fix for today */
4709 vec_validate_init_empty
4710 (im->discover_neighbor_next_index_by_hw_if_index, 32, 0 /* drop */ );
4716 VLIB_INIT_FUNCTION (ip6_neighbor_init);
4720 vnet_register_ip6_neighbor_resolution_event (vnet_main_t * vnm,
4723 uword type_opaque, uword data)
4725 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4726 ip6_address_t *address = address_arg;
4728 pending_resolution_t *pr;
4730 pool_get (nm->pending_resolutions, pr);
4732 pr->next_index = ~0;
4733 pr->node_index = node_index;
4734 pr->type_opaque = type_opaque;
4737 p = mhash_get (&nm->pending_resolutions_by_address, address);
4740 /* Insert new resolution at the head of the list */
4741 pr->next_index = p[0];
4742 mhash_unset (&nm->pending_resolutions_by_address, address, 0);
4745 mhash_set (&nm->pending_resolutions_by_address, address,
4746 pr - nm->pending_resolutions, 0 /* old value */ );
4750 vnet_add_del_ip6_nd_change_event (vnet_main_t * vnm,
4751 void *data_callback,
4755 uword type_opaque, uword data, int is_add)
4757 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4758 ip6_address_t *address = address_arg;
4760 /* Try to find an existing entry */
4761 u32 *first = (u32 *) mhash_get (&nm->mac_changes_by_address, address);
4763 pending_resolution_t *mc;
4764 while (p && *p != ~0)
4766 mc = pool_elt_at_index (nm->mac_changes, *p);
4767 if (mc->node_index == node_index && mc->type_opaque == type_opaque
4770 p = &mc->next_index;
4773 int found = p && *p != ~0;
4777 return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
4779 pool_get (nm->mac_changes, mc);
4781 *mc = (pending_resolution_t)
4784 .node_index = node_index,
4785 .type_opaque = type_opaque,
4787 .data_callback = data_callback,
4792 /* Insert new resolution at the end of the list */
4793 u32 new_idx = mc - nm->mac_changes;
4797 mhash_set (&nm->mac_changes_by_address, address, new_idx, 0);
4802 return VNET_API_ERROR_NO_SUCH_ENTRY;
4804 /* Clients may need to clean up pool entries, too */
4805 void (*fp) (u32, u8 *) = data_callback;
4807 (*fp) (mc->data, 0 /* no new mac addrs */ );
4809 /* Remove the entry from the list and delete the entry */
4810 *p = mc->next_index;
4811 pool_put (nm->mac_changes, mc);
4813 /* Remove from hash if we deleted the last entry */
4814 if (*p == ~0 && p == first)
4815 mhash_unset (&nm->mac_changes_by_address, address, 0);
4821 vnet_ip6_nd_term (vlib_main_t * vm,
4822 vlib_node_runtime_t * node,
4824 ethernet_header_t * eth,
4825 ip6_header_t * ip, u32 sw_if_index, u16 bd_index)
4827 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4828 icmp6_neighbor_solicitation_or_advertisement_header_t *ndh;
4830 ndh = ip6_next_header (ip);
4831 if (ndh->icmp.type != ICMP6_neighbor_solicitation &&
4832 ndh->icmp.type != ICMP6_neighbor_advertisement)
4835 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
4836 (p0->flags & VLIB_BUFFER_IS_TRACED)))
4838 u8 *t0 = vlib_add_trace (vm, node, p0,
4839 sizeof (icmp6_input_trace_t));
4840 clib_memcpy (t0, ip, sizeof (icmp6_input_trace_t));
4843 /* Check if anyone want ND events for L2 BDs */
4845 (nm->wc_ip6_nd_publisher_node != (uword) ~ 0
4846 && !ip6_address_is_link_local_unicast (&ip->src_address)))
4848 vnet_nd_wc_publish (sw_if_index, eth->src_address, &ip->src_address);
4851 /* Check if MAC entry exsist for solicited target IP */
4852 if (ndh->icmp.type == ICMP6_neighbor_solicitation)
4854 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *opt;
4855 l2_bridge_domain_t *bd_config;
4858 opt = (void *) (ndh + 1);
4859 if ((opt->header.type !=
4860 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address) ||
4861 (opt->header.n_data_u64s != 1))
4862 return 0; /* source link layer address option not present */
4864 bd_config = vec_elt_at_index (l2input_main.bd_configs, bd_index);
4866 (u8 *) hash_get_mem (bd_config->mac_by_ip6, &ndh->target_address);
4868 { /* found ip-mac entry, generate eighbor advertisement response */
4870 vlib_node_runtime_t *error_node =
4871 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
4872 ip->dst_address = ip->src_address;
4873 ip->src_address = ndh->target_address;
4874 ip->hop_limit = 255;
4876 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
4877 clib_memcpy (opt->ethernet_address, macp, 6);
4878 ndh->icmp.type = ICMP6_neighbor_advertisement;
4879 ndh->advertisement_flags = clib_host_to_net_u32
4880 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED |
4881 ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
4882 ndh->icmp.checksum = 0;
4883 ndh->icmp.checksum =
4884 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip, &bogus_length);
4885 clib_memcpy (eth->dst_address, eth->src_address, 6);
4886 clib_memcpy (eth->src_address, macp, 6);
4887 vlib_error_count (vm, error_node->node_index,
4888 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX, 1);
4898 ip6_neighbor_proxy_add_del (u32 sw_if_index, ip6_address_t * addr, u8 is_del)
4902 fib_prefix_t pfx = {
4904 .fp_proto = FIB_PROTOCOL_IP6,
4909 ip46_address_t nh = {
4913 fib_index = ip6_fib_table_get_index_for_sw_if_index (sw_if_index);
4915 if (~0 == fib_index)
4916 return VNET_API_ERROR_NO_SUCH_FIB;
4920 fib_table_entry_path_remove (fib_index,
4922 FIB_SOURCE_IP6_ND_PROXY,
4926 ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
4927 /* flush the ND cache of this address if it's there */
4928 vnet_unset_ip6_ethernet_neighbor (vlib_get_main (), sw_if_index, addr);
4932 fib_table_entry_path_add (fib_index,
4934 FIB_SOURCE_IP6_ND_PROXY,
4935 FIB_ENTRY_FLAG_NONE,
4939 ~0, 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
4944 static clib_error_t *
4945 set_ip6_nd_proxy_cmd (vlib_main_t * vm,
4946 unformat_input_t * input, vlib_cli_command_t * cmd)
4948 vnet_main_t *vnm = vnet_get_main ();
4949 clib_error_t *error = 0;
4954 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4956 /* get the rest of the command */
4957 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
4959 if (unformat (input, "%U", unformat_ip6_address, &addr))
4961 else if (unformat (input, "delete") || unformat (input, "del"))
4964 return (unformat_parse_error (input));
4968 ip6_neighbor_proxy_add_del (sw_if_index, &addr, is_del);
4974 VLIB_CLI_COMMAND (set_ip6_nd_proxy_command, static) =
4976 .path = "set ip6 nd proxy",
4977 .short_help = "set ip6 nd proxy <HOST> <INTERFACE>",
4978 .function = set_ip6_nd_proxy_cmd,
4983 ethernet_ndp_change_mac (u32 sw_if_index)
4985 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4990 pool_foreach (n, nm->neighbor_pool,
4992 if (n->key.sw_if_index == sw_if_index)
4994 adj_nbr_walk_nh6 (sw_if_index,
4995 &n->key.ip6_address,
4996 ip6_nd_mk_complete_walk, n);
5001 ai = adj_glean_get (FIB_PROTOCOL_IP6, sw_if_index);
5003 if (ADJ_INDEX_INVALID != ai)
5004 adj_glean_update_rewrite (ai);
5008 send_ip6_na (vlib_main_t * vm, u32 sw_if_index)
5010 ip6_main_t *i6m = &ip6_main;
5011 ip6_address_t *ip6_addr = ip6_interface_first_address (i6m, sw_if_index);
5013 send_ip6_na_w_addr (vm, ip6_addr, sw_if_index);
5017 send_ip6_na_w_addr (vlib_main_t * vm,
5018 const ip6_address_t * ip6_addr, u32 sw_if_index)
5020 ip6_main_t *i6m = &ip6_main;
5021 vnet_main_t *vnm = vnet_get_main ();
5022 u8 *rewrite, rewrite_len;
5023 vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
5029 ("Sending unsolicitated NA IP6 address %U on sw_if_idex %d",
5030 format_ip6_address, ip6_addr, sw_if_index);
5032 /* Form unsolicited neighbor advertisement packet from NS pkt template */
5035 icmp6_neighbor_solicitation_header_t *h =
5036 vlib_packet_template_get_packet (vm,
5037 &i6m->discover_neighbor_packet_template,
5042 ip6_set_reserved_multicast_address (&h->ip.dst_address,
5043 IP6_MULTICAST_SCOPE_link_local,
5044 IP6_MULTICAST_GROUP_ID_all_hosts);
5045 h->ip.src_address = ip6_addr[0];
5046 h->neighbor.icmp.type = ICMP6_neighbor_advertisement;
5047 h->neighbor.target_address = ip6_addr[0];
5048 h->neighbor.advertisement_flags = clib_host_to_net_u32
5049 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
5050 h->link_layer_option.header.type =
5051 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
5052 clib_memcpy (h->link_layer_option.ethernet_address,
5053 hi->hw_address, vec_len (hi->hw_address));
5054 h->neighbor.icmp.checksum =
5055 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
5056 ASSERT (bogus_length == 0);
5058 /* Setup MAC header with IP6 Etype and mcast DMAC */
5059 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
5060 ip6_multicast_ethernet_address (dst_address,
5061 IP6_MULTICAST_GROUP_ID_all_hosts);
5063 ethernet_build_rewrite (vnm, sw_if_index, VNET_LINK_IP6, dst_address);
5064 rewrite_len = vec_len (rewrite);
5065 vlib_buffer_advance (b, -rewrite_len);
5066 ethernet_header_t *e = vlib_buffer_get_current (b);
5067 clib_memcpy (e->dst_address, rewrite, rewrite_len);
5070 /* Send unsolicited ND advertisement packet out the specified interface */
5071 vnet_buffer (b)->sw_if_index[VLIB_RX] =
5072 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
5073 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
5074 u32 *to_next = vlib_frame_vector_args (f);
5077 vlib_put_frame_to_node (vm, hi->output_node_index, f);
5082 * fd.io coding-style-patch-verification: ON
5085 * eval: (c-set-style "gnu")