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>
29 #include <vlibmemory/api.h>
33 * @brief IPv6 Neighbor Adjacency and Neighbor Discovery.
35 * The files contains the API and CLI code for managing IPv6 neighbor
36 * adjacency tables and neighbor discovery logic.
39 /* can't use sizeof link_layer_address, that's 8 */
40 #define ETHER_MAC_ADDR_LEN 6
42 /* advertised prefix option */
45 /* basic advertised information */
49 int adv_autonomous_flag;
50 u32 adv_valid_lifetime_in_secs;
51 u32 adv_pref_lifetime_in_secs;
53 /* advertised values are computed from these times if decrementing */
54 f64 valid_lifetime_expires;
55 f64 pref_lifetime_expires;
57 /* local information */
59 int deprecated_prefix_flag;
60 int decrement_lifetime_flag;
62 #define MIN_ADV_VALID_LIFETIME 7203 /* seconds */
63 #define DEF_ADV_VALID_LIFETIME 2592000
64 #define DEF_ADV_PREF_LIFETIME 604800
66 /* extensions are added here, mobile, DNS etc.. */
72 /* group information */
74 ip6_address_t mcast_address;
76 ip6_address_t *mcast_source_address_pool;
79 /* configured router advertisement information per ipv6 interface */
83 /* advertised config information, zero means unspecified */
87 u16 adv_router_lifetime_in_sec;
88 u32 adv_neighbor_reachable_time_in_msec;
89 u32 adv_time_in_msec_between_retransmitted_neighbor_solicitations;
94 /* source link layer option */
95 u8 link_layer_address[8];
96 u8 link_layer_addr_len;
99 ip6_radv_prefix_t *adv_prefixes_pool;
101 /* Hash table mapping address to index in interface advertised prefix pool. */
102 mhash_t address_to_prefix_index;
104 /* MLDP group information */
105 ip6_mldp_group_t *mldp_group_pool;
107 /* Hash table mapping address to index in mldp address pool. */
108 mhash_t address_to_mldp_index;
110 /* local information */
112 int send_radv; /* radv on/off on this interface - set by config */
113 int cease_radv; /* we are ceasing to send - set byf config */
115 int adv_link_layer_address;
117 int failed_device_check;
118 int all_routers_mcast;
122 adj_index_t mcast_adj_index;
124 /* timing information */
125 #define DEF_MAX_RADV_INTERVAL 200
126 #define DEF_MIN_RADV_INTERVAL .75 * DEF_MAX_RADV_INTERVAL
127 #define DEF_CURR_HOP_LIMIT 64
128 #define DEF_DEF_RTR_LIFETIME 3 * DEF_MAX_RADV_INTERVAL
129 #define MAX_DEF_RTR_LIFETIME 9000
131 #define MAX_INITIAL_RTR_ADVERT_INTERVAL 16 /* seconds */
132 #define MAX_INITIAL_RTR_ADVERTISEMENTS 3 /*transmissions */
133 #define MIN_DELAY_BETWEEN_RAS 3 /* seconds */
134 #define MAX_DELAY_BETWEEN_RAS 1800 /* seconds */
135 #define MAX_RA_DELAY_TIME .5 /* seconds */
137 f64 max_radv_interval;
138 f64 min_radv_interval;
139 f64 min_delay_between_radv;
140 f64 max_delay_between_radv;
141 f64 max_rtr_default_lifetime;
144 f64 last_multicast_time;
145 f64 next_multicast_time;
148 u32 initial_adverts_count;
149 f64 initial_adverts_interval;
150 u32 initial_adverts_sent;
153 u32 n_advertisements_sent;
154 u32 n_solicitations_rcvd;
155 u32 n_solicitations_dropped;
157 /* Link local address to use (defaults to underlying physical for logical interfaces */
158 ip6_address_t link_local_address;
160 /* router solicitations sending state */
161 u8 keep_sending_rs; /* when true then next fields are valid */
162 icmp6_send_router_solicitation_params_t params;
167 vlib_buffer_t *buffer;
176 /* Used for nd event notification only */
177 ip6_nd_change_event_cb_t data_callback;
179 } pending_resolution_t;
184 /* Hash tables mapping name to opcode. */
185 uword *opcode_by_name;
187 /* lite beer "glean" adjacency handling */
188 mhash_t pending_resolutions_by_address;
189 pending_resolution_t *pending_resolutions;
191 /* Mac address change notification */
192 mhash_t mac_changes_by_address;
193 pending_resolution_t *mac_changes;
195 u32 *neighbor_input_next_index_by_hw_if_index;
197 ip6_neighbor_t *neighbor_pool;
199 mhash_t neighbor_index_by_key;
201 u32 *if_radv_pool_index_by_sw_if_index;
203 ip6_radv_t *if_radv_pool;
205 /* Neighbor attack mitigation */
206 u32 limit_neighbor_cache_size;
207 u32 neighbor_delete_rotor;
209 /* Wildcard nd report publisher */
210 uword wc_ip6_nd_publisher_node;
211 uword wc_ip6_nd_publisher_et;
213 /* Router advertisement report publisher */
214 uword ip6_ra_publisher_node;
215 uword ip6_ra_publisher_et;
216 } ip6_neighbor_main_t;
218 /* ipv6 neighbor discovery - timer/event types */
222 } ip6_icmp_neighbor_discovery_event_type_t;
232 } ip6_icmp_neighbor_discovery_event_data_t;
234 static ip6_neighbor_main_t ip6_neighbor_main;
235 ip6_neighbor_public_main_t ip6_neighbor_public_main;
236 static ip6_address_t ip6a_zero; /* ip6 address 0 */
238 static void wc_nd_signal_report (wc_nd_report_t * r);
239 static void ra_signal_report (ra_report_t * r);
242 ip6_neighbor_get_link_local_address (u32 sw_if_index)
244 static ip6_address_t empty_address = { {0} };
245 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
246 ip6_radv_t *radv_info;
249 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) > sw_if_index)
250 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
253 clib_warning ("IPv6 is not enabled for sw_if_index %d", sw_if_index);
254 return empty_address;
256 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
257 if (radv_info == NULL)
259 clib_warning ("Internal error");
260 return empty_address;
262 return radv_info->link_local_address;
266 * @brief publish wildcard arp event
267 * @param sw_if_index The interface on which the ARP entires are acted
270 vnet_nd_wc_publish (u32 sw_if_index,
271 const mac_address_t * mac, const ip6_address_t * ip6)
274 .sw_if_index = sw_if_index,
279 vl_api_rpc_call_main_thread (wc_nd_signal_report, (u8 *) & r, sizeof r);
284 wc_nd_signal_report (wc_nd_report_t * r)
286 vlib_main_t *vm = vlib_get_main ();
287 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
288 uword ni = nm->wc_ip6_nd_publisher_node;
289 uword et = nm->wc_ip6_nd_publisher_et;
291 if (ni == (uword) ~ 0)
294 vlib_process_signal_event_data (vm, ni, et, 1, sizeof *q);
300 wc_nd_set_publisher_node (uword node_index, uword event_type)
302 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
303 nm->wc_ip6_nd_publisher_node = node_index;
304 nm->wc_ip6_nd_publisher_et = event_type;
308 ra_publish (ra_report_t * r)
310 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
311 vl_api_rpc_call_main_thread (ra_signal_report, (u8 *) r, sizeof *r);
316 ra_signal_report (ra_report_t * r)
318 vlib_main_t *vm = vlib_get_main ();
319 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
320 uword ni = nm->ip6_ra_publisher_node;
321 uword et = nm->ip6_ra_publisher_et;
323 if (ni == (uword) ~ 0)
325 ra_report_t *q = vlib_process_signal_event_data (vm, ni, et, 1, sizeof *q);
331 ra_set_publisher_node (uword node_index, uword event_type)
333 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
334 nm->ip6_ra_publisher_node = node_index;
335 nm->ip6_ra_publisher_et = event_type;
339 format_ip6_neighbor_ip6_entry (u8 * s, va_list * va)
341 vlib_main_t *vm = va_arg (*va, vlib_main_t *);
342 ip6_neighbor_t *n = va_arg (*va, ip6_neighbor_t *);
343 vnet_main_t *vnm = vnet_get_main ();
344 vnet_sw_interface_t *si;
348 return format (s, "%=12s%=45s%=6s%=20s%=40s", "Time", "Address", "Flags",
349 "Link layer", "Interface");
351 if (n->flags & IP_NEIGHBOR_FLAG_DYNAMIC)
352 flags = format (flags, "D");
354 if (n->flags & IP_NEIGHBOR_FLAG_STATIC)
355 flags = format (flags, "S");
357 if (n->flags & IP_NEIGHBOR_FLAG_NO_FIB_ENTRY)
358 flags = format (flags, "N");
360 si = vnet_get_sw_interface (vnm, n->key.sw_if_index);
361 s = format (s, "%=12U%=45U%=6s%=20U%=40U",
362 format_vlib_time, vm, n->time_last_updated,
363 format_ip6_address, &n->key.ip6_address,
364 flags ? (char *) flags : "",
365 format_mac_address_t, &n->mac,
366 format_vnet_sw_interface_name, vnm, si);
373 ip6_neighbor_adj_fib_remove (ip6_neighbor_t * n, u32 fib_index)
375 if (FIB_NODE_INDEX_INVALID != n->fib_entry_index)
377 if (ip6_address_is_link_local_unicast (&n->key.ip6_address))
379 ip6_ll_prefix_t pfx = {
380 .ilp_addr = n->key.ip6_address,
381 .ilp_sw_if_index = n->key.sw_if_index,
383 ip6_ll_table_entry_delete (&pfx);
389 .fp_proto = FIB_PROTOCOL_IP6,
390 .fp_addr.ip6 = n->key.ip6_address,
392 fib_table_entry_path_remove (fib_index,
397 n->key.sw_if_index, ~0,
398 1, FIB_ROUTE_PATH_FLAG_NONE);
406 ip_neighbor_flags_t flags;
410 } ip6_neighbor_set_unset_rpc_args_t;
412 static void ip6_neighbor_set_unset_rpc_callback
413 (ip6_neighbor_set_unset_rpc_args_t * a);
415 static void set_unset_ip6_neighbor_rpc
418 const ip6_address_t * a,
419 const mac_address_t * mac, int is_add, ip_neighbor_flags_t flags)
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;
427 ip6_address_copy (&args.addr, a);
428 mac_address_copy (&args.mac, mac);
430 vl_api_rpc_call_main_thread (ip6_neighbor_set_unset_rpc_callback,
431 (u8 *) & args, sizeof (args));
435 ip6_nbr_probe (ip_adjacency_t * adj)
437 icmp6_neighbor_solicitation_header_t *h;
438 vnet_main_t *vnm = vnet_get_main ();
439 ip6_main_t *im = &ip6_main;
440 ip_interface_address_t *ia;
441 ip6_address_t *dst, *src;
442 vnet_hw_interface_t *hi;
443 vnet_sw_interface_t *si;
449 vm = vlib_get_main ();
451 si = vnet_get_sw_interface (vnm, adj->rewrite_header.sw_if_index);
452 dst = &adj->sub_type.nbr.next_hop.ip6;
454 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
458 src = ip6_interface_address_matching_destination (im, dst,
466 h = vlib_packet_template_get_packet (vm,
467 &im->discover_neighbor_packet_template,
472 hi = vnet_get_sup_hw_interface (vnm, adj->rewrite_header.sw_if_index);
474 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
475 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
476 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
477 h->ip.src_address = src[0];
478 h->neighbor.target_address = dst[0];
480 clib_memcpy (h->link_layer_option.ethernet_address,
481 hi->hw_address, vec_len (hi->hw_address));
483 h->neighbor.icmp.checksum =
484 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
485 ASSERT (bogus_length == 0);
487 b = vlib_get_buffer (vm, bi);
488 vnet_buffer (b)->sw_if_index[VLIB_RX] =
489 vnet_buffer (b)->sw_if_index[VLIB_TX] = adj->rewrite_header.sw_if_index;
491 /* Add encapsulation string for software interface (e.g. ethernet header). */
492 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
493 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
496 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
497 u32 *to_next = vlib_frame_vector_args (f);
500 vlib_put_frame_to_node (vm, hi->output_node_index, f);
505 ip6_nd_mk_complete (adj_index_t ai, ip6_neighbor_t * nbr)
507 adj_nbr_update_rewrite (ai, ADJ_NBR_REWRITE_FLAG_COMPLETE,
508 ethernet_build_rewrite (vnet_get_main (),
509 nbr->key.sw_if_index,
510 adj_get_link_type (ai),
515 ip6_nd_mk_incomplete (adj_index_t ai)
517 ip_adjacency_t *adj = adj_get (ai);
519 adj_nbr_update_rewrite (ai,
520 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
521 ethernet_build_rewrite (vnet_get_main (),
524 adj_get_link_type (ai),
525 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
528 #define IP6_NBR_MK_KEY(k, sw_if_index, addr) \
530 k.sw_if_index = sw_if_index; \
531 k.ip6_address = *addr; \
535 static ip6_neighbor_t *
536 ip6_nd_find (u32 sw_if_index, const ip6_address_t * addr)
538 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
539 ip6_neighbor_t *n = NULL;
540 ip6_neighbor_key_t k;
543 IP6_NBR_MK_KEY (k, sw_if_index, addr);
545 p = mhash_get (&nm->neighbor_index_by_key, &k);
548 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
555 ip6_nd_mk_complete_walk (adj_index_t ai, void *ctx)
557 ip6_neighbor_t *nbr = ctx;
559 ip6_nd_mk_complete (ai, nbr);
561 return (ADJ_WALK_RC_CONTINUE);
565 ip6_nd_mk_incomplete_walk (adj_index_t ai, void *ctx)
567 ip6_nd_mk_incomplete (ai);
569 return (ADJ_WALK_RC_CONTINUE);
572 static clib_error_t *
573 ip6_neighbor_sw_interface_up_down (vnet_main_t * vnm,
574 u32 sw_if_index, u32 flags)
576 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
578 u32 i, *to_delete = 0;
581 pool_foreach (n, nm->neighbor_pool,
583 if (n->key.sw_if_index == sw_if_index)
584 vec_add1 (to_delete, n - nm->neighbor_pool);
588 if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
590 for (i = 0; i < vec_len (to_delete); i++)
592 n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
593 adj_nbr_walk_nh6 (n->key.sw_if_index, &n->key.ip6_address,
594 ip6_nd_mk_complete_walk, n);
599 for (i = 0; i < vec_len (to_delete); i++)
601 n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
602 adj_nbr_walk_nh6 (n->key.sw_if_index, &n->key.ip6_address,
603 ip6_nd_mk_incomplete_walk, NULL);
604 if (n->flags & IP_NEIGHBOR_FLAG_STATIC)
606 ip6_neighbor_adj_fib_remove (n,
607 ip6_fib_table_get_index_for_sw_if_index
608 (n->key.sw_if_index));
609 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
610 pool_put (nm->neighbor_pool, n);
614 vec_free (to_delete);
618 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_neighbor_sw_interface_up_down);
621 ip6_ethernet_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
628 nbr = ip6_nd_find (sw_if_index, &adj->sub_type.nbr.next_hop.ip6);
630 switch (adj->lookup_next_index)
632 case IP_LOOKUP_NEXT_GLEAN:
633 adj_glean_update_rewrite (ai);
635 case IP_LOOKUP_NEXT_ARP:
638 adj_nbr_walk_nh6 (sw_if_index, &nbr->key.ip6_address,
639 ip6_nd_mk_complete_walk, nbr);
644 * no matching ND entry.
645 * construct the rewrite required to for an ND packet, and stick
646 * that in the adj's pipe to smoke.
648 adj_nbr_update_rewrite (ai,
649 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
650 ethernet_build_rewrite (vnm,
653 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
656 * since the FIB has added this adj for a route, it makes sense it may
657 * want to forward traffic sometime soon. Let's send a speculative ND.
658 * just one. If we were to do periodically that wouldn't be bad either,
659 * but that's more code than i'm prepared to write at this time for
660 * relatively little reward.
665 case IP_LOOKUP_NEXT_BCAST:
666 adj_nbr_update_rewrite (ai,
667 ADJ_NBR_REWRITE_FLAG_COMPLETE,
668 ethernet_build_rewrite (vnm,
671 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
673 case IP_LOOKUP_NEXT_MCAST:
676 * Construct a partial rewrite from the known ethernet mcast dest MAC
681 rewrite = ethernet_build_rewrite (vnm,
684 ethernet_ip6_mcast_dst_addr ());
687 * Complete the remaining fields of the adj's rewrite to direct the
688 * complete of the rewrite at switch time by copying in the IP
689 * dst address's bytes.
690 * Ofset is 2 bytes into the desintation address.
692 offset = vec_len (rewrite) - 2;
693 adj_mcast_update_rewrite (ai, rewrite, offset);
697 case IP_LOOKUP_NEXT_DROP:
698 case IP_LOOKUP_NEXT_PUNT:
699 case IP_LOOKUP_NEXT_LOCAL:
700 case IP_LOOKUP_NEXT_REWRITE:
701 case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
702 case IP_LOOKUP_NEXT_MIDCHAIN:
703 case IP_LOOKUP_NEXT_ICMP_ERROR:
704 case IP_LOOKUP_N_NEXT:
712 ip6_neighbor_adj_fib_add (ip6_neighbor_t * n, u32 fib_index)
714 if (ip6_address_is_link_local_unicast (&n->key.ip6_address))
716 ip6_ll_prefix_t pfx = {
717 .ilp_addr = n->key.ip6_address,
718 .ilp_sw_if_index = n->key.sw_if_index,
721 ip6_ll_table_entry_update (&pfx, FIB_ROUTE_PATH_FLAG_NONE);
727 .fp_proto = FIB_PROTOCOL_IP6,
728 .fp_addr.ip6 = n->key.ip6_address,
732 fib_table_entry_path_add (fib_index, &pfx, FIB_SOURCE_ADJ,
733 FIB_ENTRY_FLAG_ATTACHED,
734 DPO_PROTO_IP6, &pfx.fp_addr,
735 n->key.sw_if_index, ~0, 1, NULL,
736 FIB_ROUTE_PATH_FLAG_NONE);
740 static ip6_neighbor_t *
741 force_reuse_neighbor_entry (void)
744 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
746 u32 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
747 if (index == ~0) /* Try again from elt 0 */
748 index = pool_next_index (nm->neighbor_pool, index);
750 /* Find a non-static random entry to free up for reuse */
753 if ((count++ == 100) || (index == ~0))
754 return NULL; /* give up after 100 entries */
755 n = pool_elt_at_index (nm->neighbor_pool, index);
756 nm->neighbor_delete_rotor = index;
757 index = pool_next_index (nm->neighbor_pool, index);
759 while (n->flags & IP_NEIGHBOR_FLAG_STATIC);
761 /* Remove ARP entry from its interface and update fib */
762 adj_nbr_walk_nh6 (n->key.sw_if_index,
763 &n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL);
764 ip6_neighbor_adj_fib_remove
765 (n, ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index));
766 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
772 vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
774 const ip6_address_t * a,
775 const mac_address_t * mac,
776 ip_neighbor_flags_t flags)
778 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
779 ip6_neighbor_key_t k;
780 ip6_neighbor_t *n = 0;
781 int make_new_nd_cache_entry = 1;
784 pending_resolution_t *pr, *mc;
786 if (vlib_get_thread_index ())
788 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, mac, 1, flags);
792 k.sw_if_index = sw_if_index;
793 k.ip6_address = a[0];
796 p = mhash_get (&nm->neighbor_index_by_key, &k);
799 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
800 /* Refuse to over-write static neighbor entry. */
801 if (!(flags & IP_NEIGHBOR_FLAG_STATIC) &&
802 (n->flags & IP_NEIGHBOR_FLAG_STATIC))
804 /* if MAC address match, still check to send event */
805 if (0 == mac_address_cmp (&n->mac, mac))
806 goto check_customers;
809 make_new_nd_cache_entry = 0;
812 if (make_new_nd_cache_entry)
814 if (nm->limit_neighbor_cache_size &&
815 pool_elts (nm->neighbor_pool) >= nm->limit_neighbor_cache_size)
817 n = force_reuse_neighbor_entry ();
822 pool_get (nm->neighbor_pool, n);
824 mhash_set (&nm->neighbor_index_by_key, &k, n - nm->neighbor_pool,
827 n->fib_entry_index = FIB_NODE_INDEX_INVALID;
829 mac_address_copy (&n->mac, mac);
832 * create the adj-fib. the entry in the FIB table for and to the peer.
834 if (!(flags & IP_NEIGHBOR_FLAG_NO_FIB_ENTRY))
836 ip6_neighbor_adj_fib_add
837 (n, ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index));
841 n->flags |= IP_NEIGHBOR_FLAG_NO_FIB_ENTRY;
847 * prevent a DoS attack from the data-plane that
848 * spams us with no-op updates to the MAC address
850 if (0 == mac_address_cmp (&n->mac, mac))
852 n->time_last_updated = vlib_time_now (vm);
853 goto check_customers;
856 mac_address_copy (&n->mac, mac);
859 /* Update time stamp and flags. */
860 n->time_last_updated = vlib_time_now (vm);
861 if (flags & IP_NEIGHBOR_FLAG_STATIC)
863 n->flags |= IP_NEIGHBOR_FLAG_STATIC;
864 n->flags &= ~IP_NEIGHBOR_FLAG_DYNAMIC;
868 n->flags |= IP_NEIGHBOR_FLAG_DYNAMIC;
869 n->flags &= ~IP_NEIGHBOR_FLAG_STATIC;
872 adj_nbr_walk_nh6 (sw_if_index,
873 &n->key.ip6_address, ip6_nd_mk_complete_walk, n);
876 /* Customer(s) waiting for this address to be resolved? */
877 p = mhash_get (&nm->pending_resolutions_by_address, a);
882 while (next_index != (u32) ~ 0)
884 pr = pool_elt_at_index (nm->pending_resolutions, next_index);
885 vlib_process_signal_event (vm, pr->node_index,
886 pr->type_opaque, pr->data);
887 next_index = pr->next_index;
888 pool_put (nm->pending_resolutions, pr);
891 mhash_unset (&nm->pending_resolutions_by_address, (void *) a, 0);
894 /* Customer(s) requesting ND event for this address? */
895 p = mhash_get (&nm->mac_changes_by_address, a);
900 while (next_index != (u32) ~ 0)
904 mc = pool_elt_at_index (nm->mac_changes, next_index);
906 /* Call the user's data callback, return 1 to suppress dup events */
907 if (mc->data_callback)
908 rv = (mc->data_callback) (mc->data, mac, sw_if_index, &ip6a_zero);
910 * Signal the resolver process, as long as the user
911 * says they want to be notified
914 vlib_process_signal_event (vm, mc->node_index,
915 mc->type_opaque, mc->data);
916 next_index = mc->next_index;
924 vnet_unset_ip6_ethernet_neighbor (vlib_main_t * vm,
925 u32 sw_if_index, const ip6_address_t * a)
927 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
928 ip6_neighbor_key_t k;
933 if (vlib_get_thread_index ())
935 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, NULL, 0,
936 IP_NEIGHBOR_FLAG_NONE);
940 k.sw_if_index = sw_if_index;
941 k.ip6_address = a[0];
944 p = mhash_get (&nm->neighbor_index_by_key, &k);
951 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
953 adj_nbr_walk_nh6 (sw_if_index,
954 &n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL);
955 ip6_neighbor_adj_fib_remove
956 (n, ip6_fib_table_get_index_for_sw_if_index (sw_if_index));
958 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
959 pool_put (nm->neighbor_pool, n);
965 static void ip6_neighbor_set_unset_rpc_callback
966 (ip6_neighbor_set_unset_rpc_args_t * a)
968 vlib_main_t *vm = vlib_get_main ();
970 vnet_set_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
973 vnet_unset_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr);
977 ip6_neighbor_sort (void *a1, void *a2)
979 vnet_main_t *vnm = vnet_get_main ();
980 ip6_neighbor_t *n1 = a1, *n2 = a2;
982 cmp = vnet_sw_interface_compare (vnm, n1->key.sw_if_index,
983 n2->key.sw_if_index);
985 cmp = ip6_address_compare (&n1->key.ip6_address, &n2->key.ip6_address);
990 ip6_neighbors_pool (void)
992 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
993 return nm->neighbor_pool;
997 ip6_neighbors_entries (u32 sw_if_index)
999 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1000 ip6_neighbor_t *n, *ns = NULL;
1003 pool_foreach (n, nm->neighbor_pool,
1005 if (sw_if_index != ~0 && n->key.sw_if_index != sw_if_index)
1007 vec_add1 (ns, n[0]);
1012 vec_sort_with_function (ns, ip6_neighbor_sort);
1016 static clib_error_t *
1017 show_ip6_neighbors (vlib_main_t * vm,
1018 unformat_input_t * input, vlib_cli_command_t * cmd)
1020 vnet_main_t *vnm = vnet_get_main ();
1021 ip6_neighbor_t *n, *ns;
1022 clib_error_t *error = 0;
1025 /* Filter entries by interface if given. */
1027 (void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index);
1029 ns = ip6_neighbors_entries (sw_if_index);
1032 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, 0);
1035 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, n);
1044 * This command is used to display the adjacent IPv6 hosts found via
1045 * neighbor discovery. Optionally, limit the output to the specified
1049 * Example of how to display the IPv6 neighbor adjacency table:
1050 * @cliexstart{show ip6 neighbors}
1051 * Time Address Flags Link layer Interface
1052 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
1053 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
1054 * 886.6654 ::1:1:c:0:9 S 02:fe:e4:45:27:5b GigabitEthernet3/0/0
1056 * Example of how to display the IPv6 neighbor adjacency table for given interface:
1057 * @cliexstart{show ip6 neighbors GigabitEthernet2/0/0}
1058 * Time Address Flags Link layer Interface
1059 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
1060 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
1064 VLIB_CLI_COMMAND (show_ip6_neighbors_command, static) = {
1065 .path = "show ip6 neighbors",
1066 .function = show_ip6_neighbors,
1067 .short_help = "show ip6 neighbors [<interface>]",
1071 static clib_error_t *
1072 set_ip6_neighbor (vlib_main_t * vm,
1073 unformat_input_t * input, vlib_cli_command_t * cmd)
1075 ip_neighbor_flags_t flags = IP_NEIGHBOR_FLAG_NONE;
1076 vnet_main_t *vnm = vnet_get_main ();
1083 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1085 /* intfc, ip6-address, mac-address */
1086 if (unformat (input, "%U %U %U",
1087 unformat_vnet_sw_interface, vnm, &sw_if_index,
1088 unformat_ip6_address, &addr,
1089 unformat_mac_address_t, &mac))
1092 else if (unformat (input, "delete") || unformat (input, "del"))
1094 else if (unformat (input, "static"))
1095 flags |= IP_NEIGHBOR_FLAG_STATIC;
1096 else if (unformat (input, "no-fib-entry"))
1097 flags |= IP_NEIGHBOR_FLAG_NO_FIB_ENTRY;
1103 return clib_error_return (0, "Missing interface, ip6 or hw address");
1106 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index, &addr, &mac, flags);
1108 vnet_unset_ip6_ethernet_neighbor (vm, sw_if_index, &addr);
1113 * This command is used to manually add an entry to the IPv6 neighbor
1114 * adjacency table. Optionally, the entry can be added as static. It is
1115 * also used to remove an entry from the table. Use the '<em>show ip6
1116 * neighbors</em>' command to display all learned and manually entered entries.
1119 * Example of how to add a static entry to the IPv6 neighbor adjacency table:
1120 * @cliexcmd{set ip6 neighbor GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b static}
1121 * Example of how to delete an entry from the IPv6 neighbor adjacency table:
1122 * @cliexcmd{set ip6 neighbor del GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b}
1125 VLIB_CLI_COMMAND (set_ip6_neighbor_command, static) =
1127 .path = "set ip6 neighbor",
1128 .function = set_ip6_neighbor,
1129 .short_help = "set ip6 neighbor [del] <interface> <ip6-address> <mac-address> [static]",
1135 ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP,
1136 ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY,
1137 ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
1138 } icmp6_neighbor_solicitation_or_advertisement_next_t;
1140 static_always_inline uword
1141 icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
1142 vlib_node_runtime_t * node,
1143 vlib_frame_t * frame,
1144 uword is_solicitation)
1146 vnet_main_t *vnm = vnet_get_main ();
1147 ip6_main_t *im = &ip6_main;
1148 uword n_packets = frame->n_vectors;
1149 u32 *from, *to_next;
1150 u32 n_left_from, n_left_to_next, next_index, n_advertisements_sent;
1151 icmp6_neighbor_discovery_option_type_t option_type;
1152 vlib_node_runtime_t *error_node =
1153 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1156 from = vlib_frame_vector_args (frame);
1157 n_left_from = n_packets;
1158 next_index = node->cached_next_index;
1160 if (node->flags & VLIB_NODE_FLAG_TRACE)
1161 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1163 sizeof (icmp6_input_trace_t));
1167 ? ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address
1168 : ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address);
1169 n_advertisements_sent = 0;
1171 while (n_left_from > 0)
1173 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1175 while (n_left_from > 0 && n_left_to_next > 0)
1179 icmp6_neighbor_solicitation_or_advertisement_header_t *h0;
1180 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1181 u32 bi0, options_len0, sw_if_index0, next0, error0;
1182 u32 ip6_sadd_link_local, ip6_sadd_unspecified;
1186 bi0 = to_next[0] = from[0];
1191 n_left_to_next -= 1;
1193 p0 = vlib_get_buffer (vm, bi0);
1194 ip0 = vlib_buffer_get_current (p0);
1195 h0 = ip6_next_header (ip0);
1197 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1199 error0 = ICMP6_ERROR_NONE;
1200 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1201 ip6_sadd_link_local =
1202 ip6_address_is_link_local_unicast (&ip0->src_address);
1203 ip6_sadd_unspecified =
1204 ip6_address_is_unspecified (&ip0->src_address);
1206 /* Check that source address is unspecified, link-local or else on-link. */
1207 if (!ip6_sadd_unspecified && !ip6_sadd_link_local)
1209 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1211 if (ADJ_INDEX_INVALID != src_adj_index0)
1213 ip_adjacency_t *adj0 = adj_get (src_adj_index0);
1215 /* Allow all realistic-looking rewrite adjacencies to pass */
1216 ni0 = adj0->lookup_next_index;
1217 is_rewrite0 = (ni0 >= IP_LOOKUP_NEXT_ARP) &&
1218 (ni0 < IP6_LOOKUP_N_NEXT);
1220 error0 = ((adj0->rewrite_header.sw_if_index != sw_if_index0
1223 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK
1229 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK;
1233 o0 = (void *) (h0 + 1);
1234 o0 = ((options_len0 == 8 && o0->header.type == option_type
1235 && o0->header.n_data_u64s == 1) ? o0 : 0);
1237 /* If src address unspecified or link local, donot learn neighbor MAC */
1238 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1239 !ip6_sadd_unspecified))
1241 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1244 &h0->target_address,
1246 o0->ethernet_address,
1247 IP_NEIGHBOR_FLAG_NONE);
1250 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1252 /* Check that target address is local to this router. */
1253 fib_node_index_t fei;
1257 ip6_fib_table_get_index_for_sw_if_index (sw_if_index0);
1259 if (~0 == fib_index)
1261 error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1265 if (ip6_address_is_link_local_unicast (&h0->target_address))
1267 fei = ip6_fib_table_lookup_exact_match
1268 (ip6_ll_fib_get (sw_if_index0),
1269 &h0->target_address, 128);
1273 fei = ip6_fib_table_lookup_exact_match (fib_index,
1274 &h0->target_address,
1278 if (FIB_NODE_INDEX_INVALID == fei)
1280 /* The target address is not in the FIB */
1282 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1286 if (FIB_ENTRY_FLAG_LOCAL &
1287 fib_entry_get_flags_for_source (fei,
1288 FIB_SOURCE_INTERFACE))
1290 /* It's an address that belongs to one of our interfaces
1294 if (fib_entry_is_sourced
1295 (fei, FIB_SOURCE_IP6_ND_PROXY) ||
1296 fib_entry_is_sourced (fei, FIB_SOURCE_IP6_ND))
1298 /* The address was added by IPv6 Proxy ND config.
1299 * We should only respond to these if the NS arrived on
1300 * the link that has a matching covering prefix */
1305 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1311 if (is_solicitation)
1312 next0 = (error0 != ICMP6_ERROR_NONE
1313 ? ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP
1314 : ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY);
1318 error0 = error0 == ICMP6_ERROR_NONE ?
1319 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_RX : error0;
1322 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1324 vnet_sw_interface_t *sw_if0;
1325 ethernet_interface_t *eth_if0;
1326 ethernet_header_t *eth0;
1328 /* dst address is either source address or the all-nodes mcast addr */
1329 if (!ip6_sadd_unspecified)
1330 ip0->dst_address = ip0->src_address;
1332 ip6_set_reserved_multicast_address (&ip0->dst_address,
1333 IP6_MULTICAST_SCOPE_link_local,
1334 IP6_MULTICAST_GROUP_ID_all_hosts);
1336 ip0->src_address = h0->target_address;
1337 ip0->hop_limit = 255;
1338 h0->icmp.type = ICMP6_neighbor_advertisement;
1340 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1341 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1343 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1346 clib_memcpy (o0->ethernet_address, eth_if0->address, 6);
1348 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
1351 h0->advertisement_flags = clib_host_to_net_u32
1352 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED
1353 | ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
1355 h0->icmp.checksum = 0;
1357 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1359 ASSERT (bogus_length == 0);
1361 /* Reuse current MAC header, copy SMAC to DMAC and
1362 * interface MAC to SMAC */
1363 vlib_buffer_advance (p0, -ethernet_buffer_header_size (p0));
1364 eth0 = vlib_buffer_get_current (p0);
1365 clib_memcpy (eth0->dst_address, eth0->src_address, 6);
1367 clib_memcpy (eth0->src_address, eth_if0->address, 6);
1369 /* Setup input and output sw_if_index for packet */
1370 ASSERT (vnet_buffer (p0)->sw_if_index[VLIB_RX] == sw_if_index0);
1371 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1372 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1373 vnet_main.local_interface_sw_if_index;
1375 n_advertisements_sent++;
1378 p0->error = error_node->errors[error0];
1380 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1381 to_next, n_left_to_next,
1385 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1388 /* Account for advertisements sent. */
1389 vlib_error_count (vm, error_node->node_index,
1390 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX,
1391 n_advertisements_sent);
1393 return frame->n_vectors;
1396 /* for "syslogging" - use elog for now */
1397 #define foreach_log_level \
1398 _ (DEBUG, "DEBUG") \
1399 _ (INFO, "INFORMATION") \
1400 _ (NOTICE, "NOTICE") \
1401 _ (WARNING, "WARNING") \
1403 _ (CRIT, "CRITICAL") \
1404 _ (ALERT, "ALERT") \
1405 _ (EMERG, "EMERGENCY")
1409 #define _(f,s) LOG_##f,
1414 static char *log_level_strings[] = {
1420 static int logmask = 1 << LOG_DEBUG;
1423 ip6_neighbor_syslog (vlib_main_t * vm, int priority, char *fmt, ...)
1425 /* just use elog for now */
1429 if ((priority > LOG_EMERG) || !(logmask & (1 << priority)))
1435 what = va_format (0, fmt, &va);
1437 ELOG_TYPE_DECLARE (e) =
1439 .format = "ip6 nd: (%s): %s",.format_args = "T4T4",};
1444 ed = ELOG_DATA (&vm->elog_main, e);
1445 ed->s[0] = elog_string (&vm->elog_main, log_level_strings[priority]);
1446 ed->s[1] = elog_string (&vm->elog_main, (char *) what);
1453 call_ip6_neighbor_callbacks (void *data,
1454 _vnet_ip6_neighbor_function_list_elt_t * elt)
1456 clib_error_t *error = 0;
1460 error = elt->fp (data);
1463 elt = elt->next_ip6_neighbor_function;
1469 /* ipv6 neighbor discovery - router advertisements */
1472 ICMP6_ROUTER_SOLICITATION_NEXT_DROP,
1473 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW,
1474 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX,
1475 ICMP6_ROUTER_SOLICITATION_N_NEXT,
1476 } icmp6_router_solicitation_or_advertisement_next_t;
1478 static_always_inline uword
1479 icmp6_router_solicitation (vlib_main_t * vm,
1480 vlib_node_runtime_t * node, vlib_frame_t * frame)
1482 vnet_main_t *vnm = vnet_get_main ();
1483 ip6_main_t *im = &ip6_main;
1484 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1485 uword n_packets = frame->n_vectors;
1486 u32 *from, *to_next;
1487 u32 n_left_from, n_left_to_next, next_index;
1488 u32 n_advertisements_sent = 0;
1491 icmp6_neighbor_discovery_option_type_t option_type;
1493 vlib_node_runtime_t *error_node =
1494 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1496 from = vlib_frame_vector_args (frame);
1497 n_left_from = n_packets;
1498 next_index = node->cached_next_index;
1500 if (node->flags & VLIB_NODE_FLAG_TRACE)
1501 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1503 sizeof (icmp6_input_trace_t));
1505 /* source may append his LL address */
1506 option_type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1508 while (n_left_from > 0)
1510 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1512 while (n_left_from > 0 && n_left_to_next > 0)
1516 ip6_radv_t *radv_info = 0;
1518 icmp6_neighbor_discovery_header_t *h0;
1519 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1521 u32 bi0, options_len0, sw_if_index0, next0, error0;
1522 u32 is_solicitation = 1, is_dropped = 0;
1523 u32 is_unspecified, is_link_local;
1525 bi0 = to_next[0] = from[0];
1530 n_left_to_next -= 1;
1532 p0 = vlib_get_buffer (vm, bi0);
1533 ip0 = vlib_buffer_get_current (p0);
1534 h0 = ip6_next_header (ip0);
1536 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1537 is_unspecified = ip6_address_is_unspecified (&ip0->src_address);
1539 ip6_address_is_link_local_unicast (&ip0->src_address);
1541 error0 = ICMP6_ERROR_NONE;
1542 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1544 /* check if solicitation (not from nd_timer node) */
1545 if (ip6_address_is_unspecified (&ip0->dst_address))
1546 is_solicitation = 0;
1548 /* Check that source address is unspecified, link-local or else on-link. */
1549 if (!is_unspecified && !is_link_local)
1551 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1553 if (ADJ_INDEX_INVALID != src_adj_index0)
1555 ip_adjacency_t *adj0 = adj_get (src_adj_index0);
1557 error0 = (adj0->rewrite_header.sw_if_index != sw_if_index0
1559 ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK
1564 error0 = ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK;
1568 /* check for source LL option and process */
1569 o0 = (void *) (h0 + 1);
1570 o0 = ((options_len0 == 8
1571 && o0->header.type == option_type
1572 && o0->header.n_data_u64s == 1) ? o0 : 0);
1574 /* if src address unspecified IGNORE any options */
1575 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1576 !is_unspecified && !is_link_local))
1578 vnet_set_ip6_ethernet_neighbor
1581 (mac_address_t *) o0->ethernet_address,
1582 IP_NEIGHBOR_FLAG_NONE);
1585 /* default is to drop */
1586 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1588 if (error0 == ICMP6_ERROR_NONE)
1590 vnet_sw_interface_t *sw_if0;
1591 ethernet_interface_t *eth_if0;
1594 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1595 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1597 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1599 /* only support ethernet interface type for now */
1601 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1604 if (error0 == ICMP6_ERROR_NONE)
1608 /* adjust the sizeof the buffer to just include the ipv6 header */
1609 p0->current_length -=
1611 sizeof (icmp6_neighbor_discovery_header_t));
1613 /* look up the radv_t information for this interface */
1614 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) >
1618 nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1621 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1626 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1629 if (error0 == ICMP6_ERROR_NONE)
1631 f64 now = vlib_time_now (vm);
1633 /* for solicited adverts - need to rate limit */
1634 if (is_solicitation)
1636 if (0 != radv_info->last_radv_time &&
1637 (now - radv_info->last_radv_time) <
1638 MIN_DELAY_BETWEEN_RAS)
1641 radv_info->last_radv_time = now;
1645 icmp6_router_advertisement_header_t rh;
1647 rh.icmp.type = ICMP6_router_advertisement;
1649 rh.icmp.checksum = 0;
1651 rh.current_hop_limit = radv_info->curr_hop_limit;
1652 rh.router_lifetime_in_sec =
1653 clib_host_to_net_u16
1654 (radv_info->adv_router_lifetime_in_sec);
1656 time_in_msec_between_retransmitted_neighbor_solicitations
1658 clib_host_to_net_u32 (radv_info->
1659 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
1660 rh.neighbor_reachable_time_in_msec =
1661 clib_host_to_net_u32 (radv_info->
1662 adv_neighbor_reachable_time_in_msec);
1665 (radv_info->adv_managed_flag) ?
1666 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP :
1669 ((radv_info->adv_other_flag) ?
1670 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP :
1674 u16 payload_length =
1675 sizeof (icmp6_router_advertisement_header_t);
1677 if (vlib_buffer_add_data
1678 (vm, &bi0, (void *) &rh,
1679 sizeof (icmp6_router_advertisement_header_t)))
1681 /* buffer allocation failed, drop the pkt */
1682 error0 = ICMP6_ERROR_ALLOC_FAILURE;
1686 if (radv_info->adv_link_layer_address)
1688 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
1692 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1693 h.header.n_data_u64s = 1;
1695 /* copy ll address */
1696 clib_memcpy (&h.ethernet_address[0],
1697 eth_if0->address, 6);
1699 if (vlib_buffer_add_data
1700 (vm, &bi0, (void *) &h,
1702 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t)))
1704 error0 = ICMP6_ERROR_ALLOC_FAILURE;
1710 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t);
1713 /* add MTU option */
1714 if (radv_info->adv_link_mtu)
1716 icmp6_neighbor_discovery_mtu_option_t h;
1720 clib_host_to_net_u32 (radv_info->adv_link_mtu);
1721 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu;
1722 h.header.n_data_u64s = 1;
1725 sizeof (icmp6_neighbor_discovery_mtu_option_t);
1727 if (vlib_buffer_add_data
1728 (vm, &bi0, (void *) &h,
1730 (icmp6_neighbor_discovery_mtu_option_t)))
1732 error0 = ICMP6_ERROR_ALLOC_FAILURE;
1737 /* add advertised prefix options */
1738 ip6_radv_prefix_t *pr_info;
1741 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
1743 if(pr_info->enabled &&
1744 (!pr_info->decrement_lifetime_flag
1745 || (pr_info->pref_lifetime_expires >0)))
1747 /* advertise this prefix */
1748 icmp6_neighbor_discovery_prefix_information_option_t h;
1750 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information;
1751 h.header.n_data_u64s = (sizeof(icmp6_neighbor_discovery_prefix_information_option_t) >> 3);
1753 h.dst_address_length = pr_info->prefix_len;
1755 h.flags = (pr_info->adv_on_link_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_FLAG_ON_LINK : 0;
1756 h.flags |= (pr_info->adv_autonomous_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_AUTO : 0;
1758 if(radv_info->cease_radv && pr_info->deprecated_prefix_flag)
1760 h.valid_time = clib_host_to_net_u32(MIN_ADV_VALID_LIFETIME);
1761 h.preferred_time = 0;
1765 if(pr_info->decrement_lifetime_flag)
1767 pr_info->adv_valid_lifetime_in_secs = ((pr_info->valid_lifetime_expires > now)) ?
1768 (pr_info->valid_lifetime_expires - now) : 0;
1770 pr_info->adv_pref_lifetime_in_secs = ((pr_info->pref_lifetime_expires > now)) ?
1771 (pr_info->pref_lifetime_expires - now) : 0;
1774 h.valid_time = clib_host_to_net_u32(pr_info->adv_valid_lifetime_in_secs);
1775 h.preferred_time = clib_host_to_net_u32(pr_info->adv_pref_lifetime_in_secs) ;
1779 clib_memcpy(&h.dst_address, &pr_info->prefix, sizeof(ip6_address_t));
1781 payload_length += sizeof( icmp6_neighbor_discovery_prefix_information_option_t);
1783 if (vlib_buffer_add_data
1784 (vm, &bi0, (void *)&h,
1785 sizeof(icmp6_neighbor_discovery_prefix_information_option_t)))
1787 error0 = ICMP6_ERROR_ALLOC_FAILURE;
1795 /* add additional options before here */
1797 /* finish building the router advertisement... */
1798 if (!is_unspecified && radv_info->send_unicast)
1800 ip0->dst_address = ip0->src_address;
1804 /* target address is all-nodes mcast addr */
1805 ip6_set_reserved_multicast_address
1807 IP6_MULTICAST_SCOPE_link_local,
1808 IP6_MULTICAST_GROUP_ID_all_hosts);
1811 /* source address MUST be the link-local address */
1812 ip0->src_address = radv_info->link_local_address;
1814 ip0->hop_limit = 255;
1815 ip0->payload_length =
1816 clib_host_to_net_u16 (payload_length);
1818 icmp6_router_advertisement_header_t *rh0 =
1819 (icmp6_router_advertisement_header_t *) (ip0 + 1);
1820 rh0->icmp.checksum =
1821 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1823 ASSERT (bogus_length == 0);
1825 /* setup output if and adjacency */
1826 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1827 vnet_main.local_interface_sw_if_index;
1829 if (is_solicitation)
1831 ethernet_header_t *eth0;
1832 /* Reuse current MAC header, copy SMAC to DMAC and
1833 * interface MAC to SMAC */
1834 vlib_buffer_reset (p0);
1835 eth0 = vlib_buffer_get_current (p0);
1836 clib_memcpy (eth0->dst_address, eth0->src_address,
1838 clib_memcpy (eth0->src_address, eth_if0->address,
1841 is_dropped ? next0 :
1842 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX;
1843 vnet_buffer (p0)->sw_if_index[VLIB_TX] =
1848 adj_index0 = radv_info->mcast_adj_index;
1849 if (adj_index0 == 0)
1850 error0 = ICMP6_ERROR_DST_LOOKUP_MISS;
1854 is_dropped ? next0 :
1855 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW;
1856 vnet_buffer (p0)->ip.adj_index[VLIB_TX] =
1860 p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
1862 radv_info->n_solicitations_dropped += is_dropped;
1863 radv_info->n_solicitations_rcvd += is_solicitation;
1865 if ((error0 == ICMP6_ERROR_NONE) && !is_dropped)
1867 radv_info->n_advertisements_sent++;
1868 n_advertisements_sent++;
1875 p0->error = error_node->errors[error0];
1877 if (error0 != ICMP6_ERROR_NONE)
1878 vlib_error_count (vm, error_node->node_index, error0, 1);
1880 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1881 to_next, n_left_to_next,
1886 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1889 /* Account for router advertisements sent. */
1890 vlib_error_count (vm, error_node->node_index,
1891 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_TX,
1892 n_advertisements_sent);
1894 return frame->n_vectors;
1897 /* validate advertised info for consistancy (see RFC-4861 section 6.2.7) - log any inconsistencies, packet will always be dropped */
1898 static_always_inline uword
1899 icmp6_router_advertisement (vlib_main_t * vm,
1900 vlib_node_runtime_t * node, vlib_frame_t * frame)
1902 vnet_main_t *vnm = vnet_get_main ();
1903 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1904 uword n_packets = frame->n_vectors;
1905 u32 *from, *to_next;
1906 u32 n_left_from, n_left_to_next, next_index;
1907 u32 n_advertisements_rcvd = 0;
1909 vlib_node_runtime_t *error_node =
1910 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1912 from = vlib_frame_vector_args (frame);
1913 n_left_from = n_packets;
1914 next_index = node->cached_next_index;
1916 if (node->flags & VLIB_NODE_FLAG_TRACE)
1917 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1919 sizeof (icmp6_input_trace_t));
1921 while (n_left_from > 0)
1923 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1925 while (n_left_from > 0 && n_left_to_next > 0)
1929 ip6_radv_t *radv_info = 0;
1930 icmp6_router_advertisement_header_t *h0;
1931 u32 bi0, options_len0, sw_if_index0, next0, error0;
1933 bi0 = to_next[0] = from[0];
1938 n_left_to_next -= 1;
1940 p0 = vlib_get_buffer (vm, bi0);
1941 ip0 = vlib_buffer_get_current (p0);
1942 h0 = ip6_next_header (ip0);
1944 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1946 error0 = ICMP6_ERROR_NONE;
1947 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1949 /* Check that source address is link-local */
1950 error0 = (!ip6_address_is_link_local_unicast (&ip0->src_address)) ?
1951 ICMP6_ERROR_ROUTER_ADVERTISEMENT_SOURCE_NOT_LINK_LOCAL : error0;
1953 /* default is to drop */
1954 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1956 n_advertisements_rcvd++;
1958 if (error0 == ICMP6_ERROR_NONE)
1960 vnet_sw_interface_t *sw_if0;
1961 ethernet_interface_t *eth_if0;
1963 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1964 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1966 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1968 /* only support ethernet interface type for now */
1970 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1973 if (error0 == ICMP6_ERROR_NONE)
1977 /* look up the radv_t information for this interface */
1978 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) >
1982 nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1985 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1990 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1993 if (error0 == ICMP6_ERROR_NONE)
1995 radv_info->keep_sending_rs = 0;
1999 r.sw_if_index = sw_if_index0;
2000 memcpy (&r.router_address, &ip0->src_address, 16);
2001 r.current_hop_limit = h0->current_hop_limit;
2002 r.flags = h0->flags;
2003 r.router_lifetime_in_sec =
2004 clib_net_to_host_u16 (h0->router_lifetime_in_sec);
2005 r.neighbor_reachable_time_in_msec =
2006 clib_net_to_host_u32
2007 (h0->neighbor_reachable_time_in_msec);
2008 r.time_in_msec_between_retransmitted_neighbor_solicitations = clib_net_to_host_u32 (h0->time_in_msec_between_retransmitted_neighbor_solicitations);
2011 /* validate advertised information */
2012 if ((h0->current_hop_limit && radv_info->curr_hop_limit)
2013 && (h0->current_hop_limit !=
2014 radv_info->curr_hop_limit))
2016 ip6_neighbor_syslog (vm, LOG_WARNING,
2017 "our AdvCurHopLimit on %U doesn't agree with %U",
2018 format_vnet_sw_if_index_name,
2025 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP)
2026 != radv_info->adv_managed_flag)
2028 ip6_neighbor_syslog (vm, LOG_WARNING,
2029 "our AdvManagedFlag on %U doesn't agree with %U",
2030 format_vnet_sw_if_index_name,
2037 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP)
2038 != radv_info->adv_other_flag)
2040 ip6_neighbor_syslog (vm, LOG_WARNING,
2041 "our AdvOtherConfigFlag on %U doesn't agree with %U",
2042 format_vnet_sw_if_index_name,
2049 time_in_msec_between_retransmitted_neighbor_solicitations
2051 adv_time_in_msec_between_retransmitted_neighbor_solicitations)
2053 time_in_msec_between_retransmitted_neighbor_solicitations
2055 clib_host_to_net_u32 (radv_info->
2056 adv_time_in_msec_between_retransmitted_neighbor_solicitations)))
2058 ip6_neighbor_syslog (vm, LOG_WARNING,
2059 "our AdvRetransTimer on %U doesn't agree with %U",
2060 format_vnet_sw_if_index_name,
2066 if ((h0->neighbor_reachable_time_in_msec &&
2067 radv_info->adv_neighbor_reachable_time_in_msec) &&
2068 (h0->neighbor_reachable_time_in_msec !=
2069 clib_host_to_net_u32
2070 (radv_info->adv_neighbor_reachable_time_in_msec)))
2072 ip6_neighbor_syslog (vm, LOG_WARNING,
2073 "our AdvReachableTime on %U doesn't agree with %U",
2074 format_vnet_sw_if_index_name,
2080 /* check for MTU or prefix options or .. */
2081 u8 *opt_hdr = (u8 *) (h0 + 1);
2082 while (options_len0 > 0)
2084 icmp6_neighbor_discovery_option_header_t *o0 =
2085 (icmp6_neighbor_discovery_option_header_t *)
2087 int opt_len = o0->n_data_u64s << 3;
2088 icmp6_neighbor_discovery_option_type_t option_type =
2091 if (options_len0 < 2)
2093 ip6_neighbor_syslog (vm, LOG_ERR,
2094 "malformed RA packet on %U from %U",
2095 format_vnet_sw_if_index_name,
2104 ip6_neighbor_syslog (vm, LOG_ERR,
2105 " zero length option in RA on %U from %U",
2106 format_vnet_sw_if_index_name,
2112 else if (opt_len > options_len0)
2114 ip6_neighbor_syslog (vm, LOG_ERR,
2115 "option length in RA packet greater than total length on %U from %U",
2116 format_vnet_sw_if_index_name,
2123 options_len0 -= opt_len;
2126 switch (option_type)
2128 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address:
2130 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
2132 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
2135 if (opt_len < sizeof (*h))
2138 memcpy (r.slla, h->ethernet_address, 6);
2142 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu:
2144 icmp6_neighbor_discovery_mtu_option_t *h =
2145 (icmp6_neighbor_discovery_mtu_option_t
2148 if (opt_len < sizeof (*h))
2151 r.mtu = clib_net_to_host_u32 (h->mtu);
2153 if ((h->mtu && radv_info->adv_link_mtu) &&
2155 clib_host_to_net_u32
2156 (radv_info->adv_link_mtu)))
2158 ip6_neighbor_syslog (vm, LOG_WARNING,
2159 "our AdvLinkMTU on %U doesn't agree with %U",
2160 format_vnet_sw_if_index_name,
2168 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information:
2170 icmp6_neighbor_discovery_prefix_information_option_t
2172 (icmp6_neighbor_discovery_prefix_information_option_t
2175 /* validate advertised prefix options */
2176 ip6_radv_prefix_t *pr_info;
2177 u32 preferred, valid;
2179 if (opt_len < sizeof (*h))
2182 vec_validate (r.prefixes,
2183 vec_len (r.prefixes));
2184 ra_report_prefix_info_t *prefix =
2185 vec_elt_at_index (r.prefixes,
2186 vec_len (r.prefixes) - 1);
2189 clib_net_to_host_u32 (h->preferred_time);
2190 valid = clib_net_to_host_u32 (h->valid_time);
2192 prefix->preferred_time = preferred;
2193 prefix->valid_time = valid;
2194 prefix->flags = h->flags & 0xc0;
2195 prefix->prefix.fp_len = h->dst_address_length;
2196 prefix->prefix.fp_addr.ip6 = h->dst_address;
2197 prefix->prefix.fp_proto = FIB_PROTOCOL_IP6;
2199 /* look for matching prefix - if we our advertising it, it better be consistant */
2201 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
2205 ip6_address_mask_from_width(&mask, pr_info->prefix_len);
2207 if(pr_info->enabled &&
2208 (pr_info->prefix_len == h->dst_address_length) &&
2209 ip6_address_is_equal_masked (&pr_info->prefix, &h->dst_address, &mask))
2212 if(!pr_info->decrement_lifetime_flag &&
2213 valid != pr_info->adv_valid_lifetime_in_secs)
2215 ip6_neighbor_syslog(vm, LOG_WARNING,
2216 "our ADV validlifetime on %U for %U does not agree with %U",
2217 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
2218 format_ip6_address, &h->dst_address);
2220 if(!pr_info->decrement_lifetime_flag &&
2221 preferred != pr_info->adv_pref_lifetime_in_secs)
2223 ip6_neighbor_syslog(vm, LOG_WARNING,
2224 "our ADV preferredlifetime on %U for %U does not agree with %U",
2225 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
2226 format_ip6_address, &h->dst_address);
2244 p0->error = error_node->errors[error0];
2246 if (error0 != ICMP6_ERROR_NONE)
2247 vlib_error_count (vm, error_node->node_index, error0, 1);
2249 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2250 to_next, n_left_to_next,
2254 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2257 /* Account for router advertisements received. */
2258 vlib_error_count (vm, error_node->node_index,
2259 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_RX,
2260 n_advertisements_rcvd);
2262 return frame->n_vectors;
2266 random_f64_from_to (f64 from, f64 to)
2268 static u32 seed = 0;
2269 static u8 seed_set = 0;
2272 seed = random_default_seed ();
2275 return random_f64 (&seed) * (to - from) + from;
2279 get_mac_address (u32 sw_if_index, u8 * address)
2281 vnet_main_t *vnm = vnet_get_main ();
2282 vnet_hw_interface_t *hw_if = vnet_get_sup_hw_interface (vnm, sw_if_index);
2283 if (!hw_if->hw_address)
2285 clib_memcpy (address, hw_if->hw_address, 6);
2289 static inline vlib_buffer_t *
2290 create_buffer_for_rs (vlib_main_t * vm, ip6_radv_t * radv_info)
2294 icmp6_router_solicitation_header_t *rh;
2299 sw_if_index = radv_info->sw_if_index;
2301 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
2303 clib_warning ("buffer allocation failure");
2307 p0 = vlib_get_buffer (vm, bi0);
2308 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (p0);
2309 p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
2311 vnet_buffer (p0)->sw_if_index[VLIB_RX] = sw_if_index;
2312 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index;
2314 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
2316 rh = vlib_buffer_get_current (p0);
2317 p0->current_length = sizeof (*rh);
2319 rh->neighbor.icmp.type = ICMP6_router_solicitation;
2320 rh->neighbor.icmp.code = 0;
2321 rh->neighbor.icmp.checksum = 0;
2322 rh->neighbor.reserved_must_be_zero = 0;
2324 rh->link_layer_option.header.type =
2325 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2326 if (0 != get_mac_address (sw_if_index,
2327 rh->link_layer_option.ethernet_address))
2329 clib_warning ("interface with sw_if_index %u has no mac address",
2331 vlib_buffer_free (vm, &bi0, 1);
2334 rh->link_layer_option.header.n_data_u64s = 1;
2336 payload_length = sizeof (rh->neighbor) + sizeof (u64);
2338 rh->ip.ip_version_traffic_class_and_flow_label =
2339 clib_host_to_net_u32 (0x6 << 28);
2340 rh->ip.payload_length = clib_host_to_net_u16 (payload_length);
2341 rh->ip.protocol = IP_PROTOCOL_ICMP6;
2342 rh->ip.hop_limit = 255;
2343 rh->ip.src_address = radv_info->link_local_address;
2344 /* set address ff02::2 */
2345 rh->ip.dst_address.as_u64[0] = clib_host_to_net_u64 (0xff02ULL << 48);
2346 rh->ip.dst_address.as_u64[1] = clib_host_to_net_u64 (2);
2348 rh->neighbor.icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, p0,
2356 stop_sending_rs (vlib_main_t * vm, ip6_radv_t * ra)
2360 ra->keep_sending_rs = 0;
2363 bi0 = vlib_get_buffer_index (vm, ra->buffer);
2364 vlib_buffer_free (vm, &bi0, 1);
2370 check_send_rs (vlib_main_t * vm, ip6_radv_t * radv_info, f64 current_time,
2380 icmp6_send_router_solicitation_params_t *params;
2382 if (!radv_info->keep_sending_rs)
2385 params = &radv_info->params;
2387 if (radv_info->due_time > current_time)
2389 *due_time = radv_info->due_time;
2393 p0 = radv_info->buffer;
2395 next_index = ip6_rewrite_mcast_node.index;
2397 c0 = vlib_buffer_copy (vm, p0);
2398 ci0 = vlib_get_buffer_index (vm, c0);
2400 f = vlib_get_frame_to_node (vm, next_index);
2401 to_next = vlib_frame_vector_args (f);
2404 vlib_put_frame_to_node (vm, next_index, f);
2406 if (params->mrc != 0 && --radv_info->n_left == 0)
2407 stop_sending_rs (vm, radv_info);
2410 radv_info->sleep_interval =
2411 (2 + random_f64_from_to (-0.1, 0.1)) * radv_info->sleep_interval;
2412 if (radv_info->sleep_interval > params->mrt)
2413 radv_info->sleep_interval =
2414 (1 + random_f64_from_to (-0.1, 0.1)) * params->mrt;
2416 radv_info->due_time = current_time + radv_info->sleep_interval;
2418 if (params->mrd != 0
2419 && current_time > radv_info->start_time + params->mrd)
2420 stop_sending_rs (vm, radv_info);
2422 *due_time = radv_info->due_time;
2425 return radv_info->keep_sending_rs;
2429 send_rs_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
2432 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2433 ip6_radv_t *radv_info;
2434 uword *event_data = 0;
2435 f64 sleep_time = 1e9;
2442 vlib_process_wait_for_event_or_clock (vm, sleep_time);
2443 vlib_process_get_events (vm, &event_data);
2444 vec_reset_length (event_data);
2446 current_time = vlib_time_now (vm);
2449 due_time = current_time + 1e9;
2451 pool_foreach (radv_info, nm->if_radv_pool,
2453 if (check_send_rs (vm, radv_info, current_time, &dt)
2458 current_time = vlib_time_now (vm);
2460 while (due_time < current_time);
2462 sleep_time = due_time - current_time;
2469 VLIB_REGISTER_NODE (send_rs_process_node) = {
2470 .function = send_rs_process,
2471 .type = VLIB_NODE_TYPE_PROCESS,
2472 .name = "send-rs-process",
2477 icmp6_send_router_solicitation (vlib_main_t * vm, u32 sw_if_index, u8 stop,
2478 icmp6_send_router_solicitation_params_t *
2481 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2485 ASSERT (~0 != sw_if_index);
2487 rai = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2488 ra = pool_elt_at_index (nm->if_radv_pool, rai);
2490 stop_sending_rs (vm, ra);
2494 ra->keep_sending_rs = 1;
2495 ra->params = *params;
2496 ra->n_left = params->mrc;
2497 ra->start_time = vlib_time_now (vm);
2498 ra->sleep_interval = (1 + random_f64_from_to (-0.1, 0.1)) * params->irt;
2499 ra->due_time = 0; /* send first packet ASAP */
2500 ra->buffer = create_buffer_for_rs (vm, ra);
2502 ra->keep_sending_rs = 0;
2504 vlib_process_signal_event (vm, send_rs_process_node.index, 1, 0);
2509 * @brief Add a multicast Address to the advertised MLD set
2512 ip6_neighbor_add_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2514 ip6_mldp_group_t *mcast_group_info;
2517 /* lookup mldp info for this interface */
2518 p = mhash_get (&radv_info->address_to_mldp_index, addr);
2520 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2523 if (!mcast_group_info)
2527 pool_get (radv_info->mldp_group_pool, mcast_group_info);
2529 mi = mcast_group_info - radv_info->mldp_group_pool;
2530 mhash_set (&radv_info->address_to_mldp_index, addr, mi, /* old_value */
2533 mcast_group_info->type = 4;
2534 mcast_group_info->mcast_source_address_pool = 0;
2535 mcast_group_info->num_sources = 0;
2536 clib_memcpy (&mcast_group_info->mcast_address, addr,
2537 sizeof (ip6_address_t));
2542 * @brief Delete a multicast Address from the advertised MLD set
2545 ip6_neighbor_del_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2547 ip6_mldp_group_t *mcast_group_info;
2550 p = mhash_get (&radv_info->address_to_mldp_index, &addr);
2552 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2554 if (mcast_group_info)
2556 mhash_unset (&radv_info->address_to_mldp_index, &addr,
2558 pool_put (radv_info->mldp_group_pool, mcast_group_info);
2563 * @brief Add a multicast Address to the advertised MLD set
2566 ip6_neighbor_add_mld_grp (ip6_radv_t * a,
2567 ip6_multicast_address_scope_t scope,
2568 ip6_multicast_link_local_group_id_t group)
2572 ip6_set_reserved_multicast_address (&addr, scope, group);
2574 ip6_neighbor_add_mld_prefix (a, &addr);
2578 * @brief create and initialize router advertisement parameters with default
2579 * values for this intfc
2582 ip6_neighbor_sw_interface_add_del (vnet_main_t * vnm,
2583 u32 sw_if_index, u32 is_add)
2585 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2588 vnet_sw_interface_t *sw_if0;
2589 ethernet_interface_t *eth_if0 = 0;
2591 /* lookup radv container - ethernet interfaces only */
2592 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2593 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2594 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2599 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2601 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2605 a = pool_elt_at_index (nm->if_radv_pool, ri);
2609 ip6_radv_prefix_t *p;
2610 ip6_mldp_group_t *m;
2612 /* release the lock on the interface's mcast adj */
2613 adj_unlock (a->mcast_adj_index);
2615 /* clean up prefix and MDP pools */
2617 pool_flush(p, a->adv_prefixes_pool,
2619 mhash_unset (&a->address_to_prefix_index, &p->prefix, 0);
2621 pool_flush (m, a->mldp_group_pool,
2623 mhash_unset (&a->address_to_mldp_index, &m->mcast_address, 0);
2627 pool_free (a->mldp_group_pool);
2628 pool_free (a->adv_prefixes_pool);
2630 mhash_free (&a->address_to_prefix_index);
2631 mhash_free (&a->address_to_mldp_index);
2633 if (a->keep_sending_rs)
2634 a->keep_sending_rs = 0;
2636 pool_put (nm->if_radv_pool, a);
2637 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ~0;
2645 pool_get (nm->if_radv_pool, a);
2647 ri = a - nm->if_radv_pool;
2648 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ri;
2650 /* initialize default values (most of which are zero) */
2651 clib_memset (a, 0, sizeof (a[0]));
2653 a->sw_if_index = sw_if_index;
2654 a->max_radv_interval = DEF_MAX_RADV_INTERVAL;
2655 a->min_radv_interval = DEF_MIN_RADV_INTERVAL;
2656 a->curr_hop_limit = DEF_CURR_HOP_LIMIT;
2657 a->adv_router_lifetime_in_sec = DEF_DEF_RTR_LIFETIME;
2659 /* send ll address source address option */
2660 a->adv_link_layer_address = 1;
2662 a->min_delay_between_radv = MIN_DELAY_BETWEEN_RAS;
2663 a->max_delay_between_radv = MAX_DELAY_BETWEEN_RAS;
2664 a->max_rtr_default_lifetime = MAX_DEF_RTR_LIFETIME;
2665 a->seed = (u32) clib_cpu_time_now ();
2666 (void) random_u32 (&a->seed);
2667 a->randomizer = clib_cpu_time_now ();
2668 (void) random_u64 (&a->randomizer);
2670 a->initial_adverts_count = MAX_INITIAL_RTR_ADVERTISEMENTS;
2671 a->initial_adverts_sent = a->initial_adverts_count - 1;
2672 a->initial_adverts_interval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
2674 /* deafult is to send */
2677 /* fill in radv_info for this interface that will be needed later */
2679 vnet_sw_interface_get_mtu (vnm, sw_if_index, VNET_MTU_IP6);
2681 clib_memcpy (a->link_layer_address, eth_if0->address, 6);
2683 /* fill in default link-local address (this may be overridden) */
2684 ip6_link_local_address_from_ethernet_address
2685 (&a->link_local_address, eth_if0->address);
2687 mhash_init (&a->address_to_prefix_index, sizeof (uword),
2688 sizeof (ip6_address_t));
2689 mhash_init (&a->address_to_mldp_index, sizeof (uword),
2690 sizeof (ip6_address_t));
2692 a->mcast_adj_index = adj_mcast_add_or_lock (FIB_PROTOCOL_IP6,
2696 a->keep_sending_rs = 0;
2698 /* add multicast groups we will always be reporting */
2699 ip6_neighbor_add_mld_grp (a,
2700 IP6_MULTICAST_SCOPE_link_local,
2701 IP6_MULTICAST_GROUP_ID_all_hosts);
2702 ip6_neighbor_add_mld_grp (a,
2703 IP6_MULTICAST_SCOPE_link_local,
2704 IP6_MULTICAST_GROUP_ID_all_routers);
2705 ip6_neighbor_add_mld_grp (a,
2706 IP6_MULTICAST_SCOPE_link_local,
2707 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2713 /* send an mldpv2 report */
2715 ip6_neighbor_send_mldpv2_report (u32 sw_if_index)
2717 vnet_main_t *vnm = vnet_get_main ();
2718 vlib_main_t *vm = vnm->vlib_main;
2719 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2720 vnet_sw_interface_t *sw_if0;
2721 ethernet_interface_t *eth_if0;
2725 ip6_radv_t *radv_info;
2735 icmp6_multicast_listener_report_header_t *rh0;
2736 icmp6_multicast_listener_report_packet_t *rp0;
2738 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2739 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
2740 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2742 if (!eth_if0 || !vnet_sw_interface_is_admin_up (vnm, sw_if_index))
2745 /* look up the radv_t information for this interface */
2746 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2749 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2754 /* send report now - build a mldpv2 report packet */
2755 n_allocated = vlib_buffer_alloc (vm, &bo0, n_to_alloc);
2756 if (PREDICT_FALSE (n_allocated == 0))
2759 clib_warning ("buffer allocation failure");
2763 b0 = vlib_get_buffer (vm, bo0);
2765 /* adjust the sizeof the buffer to just include the ipv6 header */
2766 b0->current_length = sizeof (icmp6_multicast_listener_report_packet_t);
2768 payload_length = sizeof (icmp6_multicast_listener_report_header_t);
2770 b0->error = ICMP6_ERROR_NONE;
2772 rp0 = vlib_buffer_get_current (b0);
2773 ip0 = (ip6_header_t *) & rp0->ip;
2774 rh0 = (icmp6_multicast_listener_report_header_t *) & rp0->report_hdr;
2776 clib_memset (rp0, 0x0, sizeof (icmp6_multicast_listener_report_packet_t));
2778 ip0->ip_version_traffic_class_and_flow_label =
2779 clib_host_to_net_u32 (0x6 << 28);
2781 ip0->protocol = IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS;
2782 /* for DEBUG - vnet driver won't seem to emit router alerts */
2783 /* ip0->protocol = IP_PROTOCOL_ICMP6; */
2786 rh0->icmp.type = ICMP6_multicast_listener_report_v2;
2788 /* source address MUST be the link-local address */
2789 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2790 ip0->src_address = radv_info->link_local_address;
2792 /* destination is all mldpv2 routers */
2793 ip6_set_reserved_multicast_address (&ip0->dst_address,
2794 IP6_MULTICAST_SCOPE_link_local,
2795 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2797 /* add reports here */
2798 ip6_mldp_group_t *m;
2799 int num_addr_records = 0;
2800 icmp6_multicast_address_record_t rr;
2802 /* fill in the hop-by-hop extension header (router alert) info */
2803 rh0->ext_hdr.next_hdr = IP_PROTOCOL_ICMP6;
2804 rh0->ext_hdr.n_data_u64s = 0;
2806 rh0->alert.type = IP6_MLDP_ALERT_TYPE;
2808 rh0->alert.value = 0;
2813 rh0->icmp.checksum = 0;
2816 pool_foreach (m, radv_info->mldp_group_pool,
2819 rr.aux_data_len_u32s = 0;
2820 rr.num_sources = clib_host_to_net_u16 (m->num_sources);
2821 clib_memcpy(&rr.mcast_addr, &m->mcast_address, sizeof(ip6_address_t));
2825 if(vlib_buffer_add_data (vm, &bo0, (void *)&rr,
2826 sizeof(icmp6_multicast_address_record_t)))
2828 vlib_buffer_free (vm, &bo0, 1);
2832 payload_length += sizeof( icmp6_multicast_address_record_t);
2837 rh0->num_addr_records = clib_host_to_net_u16 (num_addr_records);
2839 /* update lengths */
2840 ip0->payload_length = clib_host_to_net_u16 (payload_length);
2842 rh0->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0,
2844 ASSERT (bogus_length == 0);
2847 * OK to override w/ no regard for actual FIB, because
2848 * ip6-rewrite only looks at the adjacency.
2850 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
2851 vnet_main.local_interface_sw_if_index;
2853 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
2854 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
2856 vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite-mcast");
2858 f = vlib_get_frame_to_node (vm, node->index);
2859 to_next = vlib_frame_vector_args (f);
2863 vlib_put_frame_to_node (vm, node->index, f);
2868 VLIB_REGISTER_NODE (ip6_icmp_router_solicitation_node,static) =
2870 .function = icmp6_router_solicitation,
2871 .name = "icmp6-router-solicitation",
2873 .vector_size = sizeof (u32),
2875 .format_trace = format_icmp6_input_trace,
2877 .n_next_nodes = ICMP6_ROUTER_SOLICITATION_N_NEXT,
2879 [ICMP6_ROUTER_SOLICITATION_NEXT_DROP] = "ip6-drop",
2880 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW] = "ip6-rewrite-mcast",
2881 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX] = "interface-output",
2886 /* send a RA or update the timer info etc.. */
2888 ip6_neighbor_process_timer_event (vlib_main_t * vm,
2889 vlib_node_runtime_t * node,
2890 vlib_frame_t * frame)
2892 vnet_main_t *vnm = vnet_get_main ();
2893 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2894 ip6_radv_t *radv_info;
2895 vlib_frame_t *f = 0;
2896 u32 n_this_frame = 0;
2897 u32 n_left_to_next = 0;
2900 icmp6_router_solicitation_header_t *h0;
2902 f64 now = vlib_time_now (vm);
2904 /* Interface ip6 radv info list */
2906 pool_foreach (radv_info, nm->if_radv_pool,
2908 if( !vnet_sw_interface_is_admin_up (vnm, radv_info->sw_if_index))
2910 radv_info->initial_adverts_sent = radv_info->initial_adverts_count-1;
2911 radv_info->next_multicast_time = now;
2912 radv_info->last_multicast_time = now;
2913 radv_info->last_radv_time = 0;
2914 radv_info->all_routers_mcast = 0;
2918 /* Make sure that we've joined the all-routers multicast group */
2919 if(!radv_info->all_routers_mcast)
2921 /* send MDLP_REPORT_EVENT message */
2922 ip6_neighbor_send_mldpv2_report(radv_info->sw_if_index);
2923 radv_info->all_routers_mcast = 1;
2926 /* is it time to send a multicast RA on this interface? */
2927 if(radv_info->send_radv && (now >= radv_info->next_multicast_time))
2932 f64 rfn = (radv_info->max_radv_interval - radv_info->min_radv_interval) *
2933 random_f64 (&radv_info->seed) + radv_info->min_radv_interval;
2935 /* multicast send - compute next multicast send time */
2936 if( radv_info->initial_adverts_sent > 0)
2938 radv_info->initial_adverts_sent--;
2939 if(rfn > radv_info-> initial_adverts_interval)
2940 rfn = radv_info-> initial_adverts_interval;
2942 /* check to see if we are ceasing to send */
2943 if( radv_info->initial_adverts_sent == 0)
2944 if(radv_info->cease_radv)
2945 radv_info->send_radv = 0;
2948 radv_info->next_multicast_time = rfn + now;
2949 radv_info->last_multicast_time = now;
2951 /* send advert now - build a "solicted" router advert with unspecified source address */
2952 n_allocated = vlib_buffer_alloc (vm, &bo0, n_to_alloc);
2954 if (PREDICT_FALSE(n_allocated == 0))
2956 clib_warning ("buffer allocation failure");
2959 b0 = vlib_get_buffer (vm, bo0);
2960 b0->current_length = sizeof( icmp6_router_solicitation_header_t);
2961 b0->error = ICMP6_ERROR_NONE;
2962 vnet_buffer (b0)->sw_if_index[VLIB_RX] = radv_info->sw_if_index;
2964 h0 = vlib_buffer_get_current (b0);
2966 clib_memset (h0, 0, sizeof (icmp6_router_solicitation_header_t));
2968 h0->ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2969 h0->ip.payload_length = clib_host_to_net_u16 (sizeof (icmp6_router_solicitation_header_t)
2970 - STRUCT_OFFSET_OF (icmp6_router_solicitation_header_t, neighbor));
2971 h0->ip.protocol = IP_PROTOCOL_ICMP6;
2972 h0->ip.hop_limit = 255;
2974 /* set src/dst address as "unspecified" this marks this packet as internally generated rather than recieved */
2975 h0->ip.src_address.as_u64[0] = 0;
2976 h0->ip.src_address.as_u64[1] = 0;
2978 h0->ip.dst_address.as_u64[0] = 0;
2979 h0->ip.dst_address.as_u64[1] = 0;
2981 h0->neighbor.icmp.type = ICMP6_router_solicitation;
2983 if (PREDICT_FALSE(f == 0))
2985 f = vlib_get_frame_to_node (vm, ip6_icmp_router_solicitation_node.index);
2986 to_next = vlib_frame_vector_args (f);
2987 n_left_to_next = VLIB_FRAME_SIZE;
2996 if (PREDICT_FALSE(n_left_to_next == 0))
2998 f->n_vectors = n_this_frame;
2999 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
3008 ASSERT (n_this_frame);
3009 f->n_vectors = n_this_frame;
3010 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
3016 ip6_icmp_neighbor_discovery_event_process (vlib_main_t * vm,
3017 vlib_node_runtime_t * node,
3018 vlib_frame_t * frame)
3021 ip6_icmp_neighbor_discovery_event_data_t *event_data;
3023 /* init code here */
3027 vlib_process_wait_for_event_or_clock (vm, 1. /* seconds */ );
3029 event_data = vlib_process_get_event_data (vm, &event_type);
3033 /* No events found: timer expired. */
3034 /* process interface list and send RAs as appropriate, update timer info */
3035 ip6_neighbor_process_timer_event (vm, node, frame);
3042 case ICMP6_ND_EVENT_INIT:
3053 _vec_len (event_data) = 0;
3056 return frame->n_vectors;
3060 VLIB_REGISTER_NODE (ip6_icmp_router_advertisement_node,static) =
3062 .function = icmp6_router_advertisement,
3063 .name = "icmp6-router-advertisement",
3065 .vector_size = sizeof (u32),
3067 .format_trace = format_icmp6_input_trace,
3076 vlib_node_registration_t ip6_icmp_neighbor_discovery_event_node = {
3078 .function = ip6_icmp_neighbor_discovery_event_process,
3079 .name = "ip6-icmp-neighbor-discovery-event-process",
3080 .type = VLIB_NODE_TYPE_PROCESS,
3084 icmp6_neighbor_solicitation (vlib_main_t * vm,
3085 vlib_node_runtime_t * node, vlib_frame_t * frame)
3087 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
3088 /* is_solicitation */
3093 icmp6_neighbor_advertisement (vlib_main_t * vm,
3094 vlib_node_runtime_t * node,
3095 vlib_frame_t * frame)
3097 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
3098 /* is_solicitation */
3103 VLIB_REGISTER_NODE (ip6_icmp_neighbor_solicitation_node,static) =
3105 .function = icmp6_neighbor_solicitation,
3106 .name = "icmp6-neighbor-solicitation",
3108 .vector_size = sizeof (u32),
3110 .format_trace = format_icmp6_input_trace,
3112 .n_next_nodes = ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
3114 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP] = "ip6-drop",
3115 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY] = "interface-output",
3121 VLIB_REGISTER_NODE (ip6_icmp_neighbor_advertisement_node,static) =
3123 .function = icmp6_neighbor_advertisement,
3124 .name = "icmp6-neighbor-advertisement",
3126 .vector_size = sizeof (u32),
3128 .format_trace = format_icmp6_input_trace,
3139 IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
3140 IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX,
3141 IP6_DISCOVER_NEIGHBOR_N_NEXT,
3142 } ip6_discover_neighbor_next_t;
3146 IP6_DISCOVER_NEIGHBOR_ERROR_DROP,
3147 IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT,
3148 IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS,
3149 } ip6_discover_neighbor_error_t;
3152 ip6_discover_neighbor_inline (vlib_main_t * vm,
3153 vlib_node_runtime_t * node,
3154 vlib_frame_t * frame, int is_glean)
3156 vnet_main_t *vnm = vnet_get_main ();
3157 ip6_main_t *im = &ip6_main;
3158 ip_lookup_main_t *lm = &im->lookup_main;
3159 u32 *from, *to_next_drop;
3160 uword n_left_from, n_left_to_next_drop;
3162 u32 thread_index = vm->thread_index;
3164 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3166 if (node->flags & VLIB_NODE_FLAG_TRACE)
3167 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
3169 seed = throttle_seed (&im->nd_throttle, thread_index, vlib_time_now (vm));
3171 from = vlib_frame_vector_args (frame);
3172 n_left_from = frame->n_vectors;
3174 while (n_left_from > 0)
3176 vlib_get_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
3177 to_next_drop, n_left_to_next_drop);
3179 while (n_left_from > 0 && n_left_to_next_drop > 0)
3181 u32 pi0, adj_index0, sw_if_index0, drop0, r0, next0;
3182 vnet_hw_interface_t *hw_if0;
3183 ip6_radv_t *radv_info;
3184 ip_adjacency_t *adj0;
3190 p0 = vlib_get_buffer (vm, pi0);
3192 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
3194 ip0 = vlib_buffer_get_current (p0);
3196 adj0 = adj_get (adj_index0);
3200 ip0->dst_address.as_u64[0] =
3201 adj0->sub_type.nbr.next_hop.ip6.as_u64[0];
3202 ip0->dst_address.as_u64[1] =
3203 adj0->sub_type.nbr.next_hop.ip6.as_u64[1];
3206 sw_if_index0 = adj0->rewrite_header.sw_if_index;
3207 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
3209 /* combine the address and interface for a hash */
3210 r0 = ip6_address_hash_to_u64 (&ip0->dst_address) ^ sw_if_index0;
3212 drop0 = throttle_check (&im->nd_throttle, thread_index, r0, seed);
3216 to_next_drop[0] = pi0;
3218 n_left_to_next_drop -= 1;
3220 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
3222 /* If the interface is link-down, drop the pkt */
3223 if (!(hw_if0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
3226 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) > sw_if_index0)
3228 u32 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
3231 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3239 * the adj has been updated to a rewrite but the node the DPO that got
3240 * us here hasn't - yet. no big deal. we'll drop while we wait.
3242 if (IP_LOOKUP_NEXT_REWRITE == adj0->lookup_next_index)
3246 node->errors[drop0 ? IP6_DISCOVER_NEIGHBOR_ERROR_DROP
3247 : IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT];
3254 icmp6_neighbor_solicitation_header_t *h0;
3257 h0 = vlib_packet_template_get_packet
3258 (vm, &im->discover_neighbor_packet_template, &bi0);
3262 /* copy the persistent fields from the original */
3263 b0 = vlib_get_buffer (vm, bi0);
3264 clib_memcpy_fast (b0->opaque2, p0->opaque2, sizeof (p0->opaque2));
3267 * Build ethernet header.
3268 * Choose source address based on destination lookup
3271 if (!ip6_src_address_for_packet (lm,
3274 &h0->ip.src_address))
3276 /* There is no address on the interface */
3278 node->errors[IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS];
3279 vlib_buffer_free (vm, &bi0, 1);
3284 * Destination address is a solicited node multicast address.
3285 * We need to fill in
3286 * the low 24 bits with low 24 bits of target's address.
3288 h0->ip.dst_address.as_u8[13] = ip0->dst_address.as_u8[13];
3289 h0->ip.dst_address.as_u8[14] = ip0->dst_address.as_u8[14];
3290 h0->ip.dst_address.as_u8[15] = ip0->dst_address.as_u8[15];
3292 h0->neighbor.target_address = ip0->dst_address;
3294 clib_memcpy (h0->link_layer_option.ethernet_address,
3295 hw_if0->hw_address, vec_len (hw_if0->hw_address));
3297 /* $$$$ appears we need this; why is the checksum non-zero? */
3298 h0->neighbor.icmp.checksum = 0;
3299 h0->neighbor.icmp.checksum =
3300 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h0->ip,
3303 ASSERT (bogus_length == 0);
3305 vlib_buffer_copy_trace_flag (vm, p0, bi0);
3306 vnet_buffer (b0)->sw_if_index[VLIB_TX]
3307 = vnet_buffer (p0)->sw_if_index[VLIB_TX];
3309 vnet_buffer (b0)->ip.adj_index[VLIB_TX] =
3310 radv_info->mcast_adj_index;
3312 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
3313 next0 = IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX;
3315 vlib_set_next_frame_buffer (vm, node, next0, bi0);
3319 vlib_put_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
3320 n_left_to_next_drop);
3323 return frame->n_vectors;
3327 ip6_discover_neighbor (vlib_main_t * vm,
3328 vlib_node_runtime_t * node, vlib_frame_t * frame)
3330 return (ip6_discover_neighbor_inline (vm, node, frame, 0));
3334 ip6_glean (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3336 return (ip6_discover_neighbor_inline (vm, node, frame, 1));
3339 static char *ip6_discover_neighbor_error_strings[] = {
3340 [IP6_DISCOVER_NEIGHBOR_ERROR_DROP] = "address overflow drops",
3341 [IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT] = "neighbor solicitations sent",
3342 [IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS]
3343 = "no source address for ND solicitation",
3347 VLIB_REGISTER_NODE (ip6_glean_node) =
3349 .function = ip6_glean,
3350 .name = "ip6-glean",
3351 .vector_size = sizeof (u32),
3352 .format_trace = format_ip6_forward_next_trace,
3353 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
3354 .error_strings = ip6_discover_neighbor_error_strings,
3355 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
3358 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "ip6-drop",
3359 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "ip6-rewrite-mcast",
3362 VLIB_REGISTER_NODE (ip6_discover_neighbor_node) =
3364 .function = ip6_discover_neighbor,
3365 .name = "ip6-discover-neighbor",
3366 .vector_size = sizeof (u32),
3367 .format_trace = format_ip6_forward_next_trace,
3368 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
3369 .error_strings = ip6_discover_neighbor_error_strings,
3370 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
3373 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "ip6-drop",
3374 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "ip6-rewrite-mcast",
3379 /* API support functions */
3381 ip6_neighbor_ra_config (vlib_main_t * vm, u32 sw_if_index,
3382 u8 suppress, u8 managed, u8 other,
3383 u8 ll_option, u8 send_unicast, u8 cease,
3384 u8 use_lifetime, u32 lifetime,
3385 u32 initial_count, u32 initial_interval,
3386 u32 max_interval, u32 min_interval, u8 is_no)
3388 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3392 /* look up the radv_t information for this interface */
3393 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3395 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3396 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
3401 ip6_radv_t *radv_info;
3402 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3404 if ((max_interval != 0) && (min_interval == 0))
3405 min_interval = .75 * max_interval;
3409 0) ? ((is_no) ? DEF_MAX_RADV_INTERVAL : max_interval) :
3410 radv_info->max_radv_interval;
3413 0) ? ((is_no) ? DEF_MIN_RADV_INTERVAL : min_interval) :
3414 radv_info->min_radv_interval;
3417 0) ? ((is_no) ? DEF_DEF_RTR_LIFETIME : lifetime) :
3418 radv_info->adv_router_lifetime_in_sec;
3422 if (lifetime > MAX_DEF_RTR_LIFETIME)
3423 lifetime = MAX_DEF_RTR_LIFETIME;
3425 if (lifetime <= max_interval)
3426 return VNET_API_ERROR_INVALID_VALUE;
3429 if (min_interval != 0)
3431 if ((min_interval > .75 * max_interval) || (min_interval < 3))
3432 return VNET_API_ERROR_INVALID_VALUE;
3435 if ((initial_count > MAX_INITIAL_RTR_ADVERTISEMENTS) ||
3436 (initial_interval > MAX_INITIAL_RTR_ADVERT_INTERVAL))
3437 return VNET_API_ERROR_INVALID_VALUE;
3440 if "flag" is set and is_no is true then restore default value else set value corresponding to "flag"
3441 if "flag" is clear don't change corresponding value
3443 radv_info->send_radv =
3444 (suppress != 0) ? ((is_no != 0) ? 1 : 0) : radv_info->send_radv;
3445 radv_info->adv_managed_flag =
3446 (managed != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_managed_flag;
3447 radv_info->adv_other_flag =
3448 (other != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_other_flag;
3449 radv_info->adv_link_layer_address =
3451 0) ? ((is_no) ? 1 : 0) : radv_info->adv_link_layer_address;
3452 radv_info->send_unicast =
3453 (send_unicast != 0) ? ((is_no) ? 0 : 1) : radv_info->send_unicast;
3454 radv_info->cease_radv =
3455 (cease != 0) ? ((is_no) ? 0 : 1) : radv_info->cease_radv;
3457 radv_info->min_radv_interval = min_interval;
3458 radv_info->max_radv_interval = max_interval;
3459 radv_info->adv_router_lifetime_in_sec = lifetime;
3461 radv_info->initial_adverts_count =
3463 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERTISEMENTS : initial_count) :
3464 radv_info->initial_adverts_count;
3465 radv_info->initial_adverts_interval =
3466 (initial_interval !=
3467 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERT_INTERVAL : initial_interval) :
3468 radv_info->initial_adverts_interval;
3471 if ((cease != 0) && (is_no))
3472 radv_info->send_radv = 1;
3474 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
3475 radv_info->next_multicast_time = vlib_time_now (vm);
3476 radv_info->last_multicast_time = vlib_time_now (vm);
3477 radv_info->last_radv_time = 0;
3483 ip6_neighbor_ra_prefix (vlib_main_t * vm, u32 sw_if_index,
3484 ip6_address_t * prefix_addr, u8 prefix_len,
3485 u8 use_default, u32 val_lifetime, u32 pref_lifetime,
3486 u8 no_advertise, u8 off_link, u8 no_autoconfig,
3487 u8 no_onlink, u8 is_no)
3489 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3494 /* look up the radv_t information for this interface */
3495 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3498 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3500 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
3504 f64 now = vlib_time_now (vm);
3505 ip6_radv_t *radv_info;
3506 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3508 /* prefix info add, delete or update */
3509 ip6_radv_prefix_t *prefix;
3511 /* lookup prefix info for this address on this interface */
3512 uword *p = mhash_get (&radv_info->address_to_prefix_index, prefix_addr);
3514 prefix = p ? pool_elt_at_index (radv_info->adv_prefixes_pool, p[0]) : 0;
3520 return VNET_API_ERROR_INVALID_VALUE; /* invalid prefix */
3522 if (prefix->prefix_len != prefix_len)
3523 return VNET_API_ERROR_INVALID_VALUE_2;
3525 /* FIXME - Should the DP do this or the CP ? */
3526 /* do specific delete processing here before returning */
3527 /* try to remove from routing table */
3529 mhash_unset (&radv_info->address_to_prefix_index, prefix_addr,
3531 pool_put (radv_info->adv_prefixes_pool, prefix);
3533 radv_info->initial_adverts_sent =
3534 radv_info->initial_adverts_count - 1;
3535 radv_info->next_multicast_time = vlib_time_now (vm);
3536 radv_info->last_multicast_time = vlib_time_now (vm);
3537 radv_info->last_radv_time = 0;
3541 /* adding or changing */
3546 pool_get (radv_info->adv_prefixes_pool, prefix);
3547 pi = prefix - radv_info->adv_prefixes_pool;
3548 mhash_set (&radv_info->address_to_prefix_index, prefix_addr, pi,
3551 clib_memset (prefix, 0x0, sizeof (ip6_radv_prefix_t));
3553 prefix->prefix_len = prefix_len;
3554 clib_memcpy (&prefix->prefix, prefix_addr, sizeof (ip6_address_t));
3556 /* initialize default values */
3557 prefix->adv_on_link_flag = 1; /* L bit set */
3558 prefix->adv_autonomous_flag = 1; /* A bit set */
3559 prefix->adv_valid_lifetime_in_secs = DEF_ADV_VALID_LIFETIME;
3560 prefix->adv_pref_lifetime_in_secs = DEF_ADV_PREF_LIFETIME;
3561 prefix->enabled = 1;
3562 prefix->decrement_lifetime_flag = 1;
3563 prefix->deprecated_prefix_flag = 1;
3567 /* FIXME - Should the DP do this or the CP ? */
3568 /* insert prefix into routing table as a connected prefix */
3577 if (prefix->prefix_len != prefix_len)
3578 return VNET_API_ERROR_INVALID_VALUE_2;
3582 /* FIXME - Should the DP do this or the CP ? */
3583 /* remove from routing table if already there */
3587 if ((val_lifetime == ~0) || (pref_lifetime == ~0))
3589 prefix->adv_valid_lifetime_in_secs = ~0;
3590 prefix->adv_pref_lifetime_in_secs = ~0;
3591 prefix->decrement_lifetime_flag = 0;
3595 prefix->adv_valid_lifetime_in_secs = val_lifetime;;
3596 prefix->adv_pref_lifetime_in_secs = pref_lifetime;
3599 /* copy remaining */
3600 prefix->enabled = !(no_advertise != 0);
3601 prefix->adv_on_link_flag = !((off_link != 0) || (no_onlink != 0));
3602 prefix->adv_autonomous_flag = !(no_autoconfig != 0);
3606 /* fill in the expiration times */
3607 prefix->valid_lifetime_expires =
3608 now + prefix->adv_valid_lifetime_in_secs;
3609 prefix->pref_lifetime_expires = now + prefix->adv_pref_lifetime_in_secs;
3611 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
3612 radv_info->next_multicast_time = vlib_time_now (vm);
3613 radv_info->last_multicast_time = vlib_time_now (vm);
3614 radv_info->last_radv_time = 0;
3620 ip6_neighbor_cmd (vlib_main_t * vm, unformat_input_t * main_input,
3621 vlib_cli_command_t * cmd)
3623 vnet_main_t *vnm = vnet_get_main ();
3624 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3625 clib_error_t *error = 0;
3627 u8 suppress = 0, managed = 0, other = 0;
3628 u8 suppress_ll_option = 0, send_unicast = 0, cease = 0;
3629 u8 use_lifetime = 0;
3630 u32 sw_if_index, ra_lifetime = 0, ra_initial_count =
3631 0, ra_initial_interval = 0;
3632 u32 ra_max_interval = 0, ra_min_interval = 0;
3634 unformat_input_t _line_input, *line_input = &_line_input;
3635 vnet_sw_interface_t *sw_if0;
3637 int add_radv_info = 1;
3638 __attribute__ ((unused)) ip6_radv_t *radv_info = 0;
3639 ip6_address_t ip6_addr;
3643 /* Get a line of input. */
3644 if (!unformat_user (main_input, unformat_line_input, line_input))
3647 /* get basic radv info for this interface */
3648 if (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3651 if (unformat_user (line_input,
3652 unformat_vnet_sw_interface, vnm, &sw_if_index))
3655 ethernet_interface_t *eth_if0 = 0;
3657 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
3658 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
3660 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
3665 clib_error_return (0, "Interface must be of ethernet type");
3669 /* look up the radv_t information for this interface */
3670 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3673 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3677 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3681 error = clib_error_return (0, "unknown interface %U'",
3682 format_unformat_error, line_input);
3688 error = clib_error_return (0, "invalid interface name %U'",
3689 format_unformat_error, line_input);
3694 /* get the rest of the command */
3695 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3697 if (unformat (line_input, "no"))
3699 else if (unformat (line_input, "prefix %U/%d",
3700 unformat_ip6_address, &ip6_addr, &addr_len))
3705 else if (unformat (line_input, "ra-managed-config-flag"))
3710 else if (unformat (line_input, "ra-other-config-flag"))
3715 else if (unformat (line_input, "ra-suppress") ||
3716 unformat (line_input, "ra-surpress"))
3721 else if (unformat (line_input, "ra-suppress-link-layer") ||
3722 unformat (line_input, "ra-surpress-link-layer"))
3724 suppress_ll_option = 1;
3727 else if (unformat (line_input, "ra-send-unicast"))
3732 else if (unformat (line_input, "ra-lifetime"))
3734 if (!unformat (line_input, "%d", &ra_lifetime))
3736 error = unformat_parse_error (line_input);
3742 else if (unformat (line_input, "ra-initial"))
3745 (line_input, "%d %d", &ra_initial_count, &ra_initial_interval))
3747 error = unformat_parse_error (line_input);
3752 else if (unformat (line_input, "ra-interval"))
3754 if (!unformat (line_input, "%d", &ra_max_interval))
3756 error = unformat_parse_error (line_input);
3760 if (!unformat (line_input, "%d", &ra_min_interval))
3761 ra_min_interval = 0;
3764 else if (unformat (line_input, "ra-cease"))
3771 error = unformat_parse_error (line_input);
3778 ip6_neighbor_ra_config (vm, sw_if_index,
3779 suppress, managed, other,
3780 suppress_ll_option, send_unicast, cease,
3781 use_lifetime, ra_lifetime,
3782 ra_initial_count, ra_initial_interval,
3783 ra_max_interval, ra_min_interval, is_no);
3787 u32 valid_lifetime_in_secs = 0;
3788 u32 pref_lifetime_in_secs = 0;
3789 u8 use_prefix_default_values = 0;
3790 u8 no_advertise = 0;
3792 u8 no_autoconfig = 0;
3795 /* get the rest of the command */
3796 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3798 if (unformat (line_input, "default"))
3800 use_prefix_default_values = 1;
3803 else if (unformat (line_input, "infinite"))
3805 valid_lifetime_in_secs = ~0;
3806 pref_lifetime_in_secs = ~0;
3809 else if (unformat (line_input, "%d %d", &valid_lifetime_in_secs,
3810 &pref_lifetime_in_secs))
3817 /* get the rest of the command */
3818 while (!use_prefix_default_values &&
3819 unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3821 if (unformat (line_input, "no-advertise"))
3823 else if (unformat (line_input, "off-link"))
3825 else if (unformat (line_input, "no-autoconfig"))
3827 else if (unformat (line_input, "no-onlink"))
3831 error = unformat_parse_error (line_input);
3836 ip6_neighbor_ra_prefix (vm, sw_if_index,
3837 &ip6_addr, addr_len,
3838 use_prefix_default_values,
3839 valid_lifetime_in_secs,
3840 pref_lifetime_in_secs,
3842 off_link, no_autoconfig, no_onlink, is_no);
3846 unformat_free (line_input);
3852 ip6_print_addrs (vlib_main_t * vm, u32 * addrs)
3854 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3857 for (i = 0; i < vec_len (addrs); i++)
3859 ip_interface_address_t *a =
3860 pool_elt_at_index (lm->if_address_pool, addrs[i]);
3861 ip6_address_t *address = ip_interface_address_get_address (lm, a);
3863 vlib_cli_output (vm, "\t\t%U/%d",
3864 format_ip6_address, address, a->address_length);
3868 static clib_error_t *
3869 show_ip6_interface_cmd (vlib_main_t * vm,
3870 unformat_input_t * input, vlib_cli_command_t * cmd)
3872 vnet_main_t *vnm = vnet_get_main ();
3873 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3874 clib_error_t *error = 0;
3879 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3883 /* look up the radv_t information for this interface */
3884 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3887 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3891 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3892 ip6_radv_t *radv_info;
3893 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3895 vlib_cli_output (vm, "%U is admin %s\n",
3896 format_vnet_sw_interface_name, vnm,
3897 vnet_get_sw_interface (vnm, sw_if_index),
3898 (vnet_sw_interface_is_admin_up (vnm, sw_if_index) ?
3902 u32 *link_scope = 0, *global_scope = 0;
3903 u32 *local_scope = 0, *unknown_scope = 0;
3904 ip_interface_address_t *a;
3906 vec_validate_init_empty (lm->if_address_pool_index_by_sw_if_index,
3908 ai = lm->if_address_pool_index_by_sw_if_index[sw_if_index];
3910 while (ai != (u32) ~ 0)
3912 a = pool_elt_at_index (lm->if_address_pool, ai);
3913 ip6_address_t *address =
3914 ip_interface_address_get_address (lm, a);
3916 if (ip6_address_is_link_local_unicast (address))
3917 vec_add1 (link_scope, ai);
3918 else if (ip6_address_is_global_unicast (address))
3919 vec_add1 (global_scope, ai);
3920 else if (ip6_address_is_local_unicast (address))
3921 vec_add1 (local_scope, ai);
3923 vec_add1 (unknown_scope, ai);
3925 ai = a->next_this_sw_interface;
3928 if (vec_len (link_scope))
3930 vlib_cli_output (vm, "\tLink-local address(es):\n");
3931 ip6_print_addrs (vm, link_scope);
3932 vec_free (link_scope);
3935 if (vec_len (local_scope))
3937 vlib_cli_output (vm, "\tLocal unicast address(es):\n");
3938 ip6_print_addrs (vm, local_scope);
3939 vec_free (local_scope);
3942 if (vec_len (global_scope))
3944 vlib_cli_output (vm, "\tGlobal unicast address(es):\n");
3945 ip6_print_addrs (vm, global_scope);
3946 vec_free (global_scope);
3949 if (vec_len (unknown_scope))
3951 vlib_cli_output (vm, "\tOther-scope address(es):\n");
3952 ip6_print_addrs (vm, unknown_scope);
3953 vec_free (unknown_scope);
3956 vlib_cli_output (vm, "\tLink-local address(es):\n");
3957 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
3958 &radv_info->link_local_address);
3960 vlib_cli_output (vm, "\tJoined group address(es):\n");
3961 ip6_mldp_group_t *m;
3963 pool_foreach (m, radv_info->mldp_group_pool,
3965 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
3970 vlib_cli_output (vm, "\tAdvertised Prefixes:\n");
3971 ip6_radv_prefix_t *p;
3973 pool_foreach (p, radv_info->adv_prefixes_pool,
3975 vlib_cli_output (vm, "\t\tprefix %U, length %d\n",
3976 format_ip6_address, &p->prefix, p->prefix_len);
3980 vlib_cli_output (vm, "\tMTU is %d\n", radv_info->adv_link_mtu);
3981 vlib_cli_output (vm, "\tICMP error messages are unlimited\n");
3982 vlib_cli_output (vm, "\tICMP redirects are disabled\n");
3983 vlib_cli_output (vm, "\tICMP unreachables are not sent\n");
3984 vlib_cli_output (vm, "\tND DAD is disabled\n");
3985 //vlib_cli_output (vm, "\tND reachable time is %d milliseconds\n",);
3986 vlib_cli_output (vm, "\tND advertised reachable time is %d\n",
3987 radv_info->adv_neighbor_reachable_time_in_msec);
3988 vlib_cli_output (vm,
3989 "\tND advertised retransmit interval is %d (msec)\n",
3991 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
3993 u32 ra_interval = radv_info->max_radv_interval;
3994 u32 ra_interval_min = radv_info->min_radv_interval;
3995 vlib_cli_output (vm,
3996 "\tND router advertisements are sent every %d seconds (min interval is %d)\n",
3997 ra_interval, ra_interval_min);
3998 vlib_cli_output (vm,
3999 "\tND router advertisements live for %d seconds\n",
4000 radv_info->adv_router_lifetime_in_sec);
4001 vlib_cli_output (vm,
4002 "\tHosts %s stateless autoconfig for addresses\n",
4003 (radv_info->adv_managed_flag) ? "use" :
4005 vlib_cli_output (vm, "\tND router advertisements sent %d\n",
4006 radv_info->n_advertisements_sent);
4007 vlib_cli_output (vm, "\tND router solicitations received %d\n",
4008 radv_info->n_solicitations_rcvd);
4009 vlib_cli_output (vm, "\tND router solicitations dropped %d\n",
4010 radv_info->n_solicitations_dropped);
4014 error = clib_error_return (0, "IPv6 not enabled on interface",
4015 format_unformat_error, input);
4023 * This command is used to display various IPv6 attributes on a given
4027 * Example of how to display IPv6 settings:
4028 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
4029 * GigabitEthernet2/0/0 is admin up
4030 * Link-local address(es):
4032 * Joined group address(es):
4037 * Advertised Prefixes:
4038 * prefix fe80::fe:28ff:fe9c:75b3, length 64
4040 * ICMP error messages are unlimited
4041 * ICMP redirects are disabled
4042 * ICMP unreachables are not sent
4043 * ND DAD is disabled
4044 * ND advertised reachable time is 0
4045 * ND advertised retransmit interval is 0 (msec)
4046 * ND router advertisements are sent every 200 seconds (min interval is 150)
4047 * ND router advertisements live for 600 seconds
4048 * Hosts use stateless autoconfig for addresses
4049 * ND router advertisements sent 19336
4050 * ND router solicitations received 0
4051 * ND router solicitations dropped 0
4053 * Example of output if IPv6 is not enabled on the interface:
4054 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
4055 * show ip6 interface: IPv6 not enabled on interface
4059 VLIB_CLI_COMMAND (show_ip6_interface_command, static) =
4061 .path = "show ip6 interface",
4062 .function = show_ip6_interface_cmd,
4063 .short_help = "show ip6 interface <interface>",
4068 disable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
4070 clib_error_t *error = 0;
4071 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4074 /* look up the radv_t information for this interface */
4075 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
4077 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4079 /* if not created - do nothing */
4082 ip6_radv_t *radv_info;
4084 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4086 /* check radv_info ref count for other ip6 addresses on this interface */
4087 /* This implicitly excludes the link local address */
4088 if (radv_info->ref_count == 0)
4090 /* essentially "disables" ipv6 on this interface */
4091 ip6_ll_prefix_t ilp = {
4092 .ilp_addr = radv_info->link_local_address,
4093 .ilp_sw_if_index = sw_if_index,
4095 ip6_ll_table_entry_delete (&ilp);
4096 ip6_sw_interface_enable_disable (sw_if_index, 0);
4097 ip6_mfib_interface_enable_disable (sw_if_index, 0);
4098 ip6_neighbor_sw_interface_add_del (vnet_get_main (), sw_if_index,
4106 ip6_interface_enabled (vlib_main_t * vm, u32 sw_if_index)
4108 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4111 /* look up the radv_t information for this interface */
4112 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
4115 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4121 enable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
4123 clib_error_t *error = 0;
4124 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4128 /* look up the radv_t information for this interface */
4129 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
4132 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4134 /* if not created yet */
4137 vnet_main_t *vnm = vnet_get_main ();
4138 vnet_sw_interface_t *sw_if0;
4140 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
4141 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
4143 ethernet_interface_t *eth_if0;
4146 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
4149 /* create radv_info. for this interface. This holds all the info needed for router adverts */
4151 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, is_add);
4155 ip6_radv_t *radv_info;
4156 ip6_address_t link_local_address;
4158 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4160 ip6_link_local_address_from_ethernet_mac_address
4161 (&link_local_address, eth_if0->address);
4163 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index);
4164 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_SUB ||
4165 sw_if0->type == VNET_SW_INTERFACE_TYPE_PIPE ||
4166 sw_if0->type == VNET_SW_INTERFACE_TYPE_P2P)
4168 /* make up an interface id */
4169 link_local_address.as_u64[1] =
4170 random_u64 (&radv_info->randomizer);
4172 link_local_address.as_u64[0] =
4173 clib_host_to_net_u64 (0xFE80000000000000ULL);
4175 link_local_address.as_u8[8] &= 0xfd;
4178 ip6_ll_prefix_t ilp = {
4179 .ilp_addr = link_local_address,
4180 .ilp_sw_if_index = sw_if_index,
4183 ip6_ll_table_entry_update (&ilp, FIB_ROUTE_PATH_LOCAL);
4186 /* essentially "enables" ipv6 on this interface */
4187 ip6_mfib_interface_enable_disable (sw_if_index, 1);
4188 ip6_sw_interface_enable_disable (sw_if_index, 1);
4192 radv_info->link_local_address = link_local_address;
4202 ip6_get_ll_address (u32 sw_if_index, ip6_address_t * addr)
4204 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4205 ip6_radv_t *radv_info;
4208 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) <= sw_if_index)
4211 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4216 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4217 *addr = radv_info->link_local_address;
4222 static clib_error_t *
4223 enable_ip6_interface_cmd (vlib_main_t * vm,
4224 unformat_input_t * input, vlib_cli_command_t * cmd)
4226 vnet_main_t *vnm = vnet_get_main ();
4227 clib_error_t *error = 0;
4232 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4234 enable_ip6_interface (vm, sw_if_index);
4238 error = clib_error_return (0, "unknown interface\n'",
4239 format_unformat_error, input);
4246 * This command is used to enable IPv6 on a given interface.
4249 * Example of how enable IPv6 on a given interface:
4250 * @cliexcmd{enable ip6 interface GigabitEthernet2/0/0}
4253 VLIB_CLI_COMMAND (enable_ip6_interface_command, static) =
4255 .path = "enable ip6 interface",
4256 .function = enable_ip6_interface_cmd,
4257 .short_help = "enable ip6 interface <interface>",
4261 static clib_error_t *
4262 disable_ip6_interface_cmd (vlib_main_t * vm,
4263 unformat_input_t * input, vlib_cli_command_t * cmd)
4265 vnet_main_t *vnm = vnet_get_main ();
4266 clib_error_t *error = 0;
4271 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4273 error = disable_ip6_interface (vm, sw_if_index);
4277 error = clib_error_return (0, "unknown interface\n'",
4278 format_unformat_error, input);
4285 * This command is used to disable IPv6 on a given interface.
4288 * Example of how disable IPv6 on a given interface:
4289 * @cliexcmd{disable ip6 interface GigabitEthernet2/0/0}
4292 VLIB_CLI_COMMAND (disable_ip6_interface_command, static) =
4294 .path = "disable ip6 interface",
4295 .function = disable_ip6_interface_cmd,
4296 .short_help = "disable ip6 interface <interface>",
4301 * This command is used to configure the neighbor discovery
4302 * parameters on a given interface. Use the '<em>show ip6 interface</em>'
4303 * command to display some of the current neighbor discovery parameters
4304 * on a given interface. This command has three formats:
4307 * <b>Format 1 - Router Advertisement Options:</b> (Only one can be entered in a single command)
4309 * '<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>'
4313 * <em>[no] ra-managed-config-flag</em> - Advertises in ICMPv6
4314 * router-advertisement messages to use stateful address
4315 * auto-configuration to obtain address information (sets the M-bit).
4316 * Default is the M-bit is not set and the '<em>no</em>' option
4317 * returns it to this default state.
4319 * <em>[no] ra-other-config-flag</em> - Indicates in ICMPv6
4320 * router-advertisement messages that hosts use stateful auto
4321 * configuration to obtain nonaddress related information (sets
4322 * the O-bit). Default is the O-bit is not set and the '<em>no</em>'
4323 * option returns it to this default state.
4325 * <em>[no] ra-suppress</em> - Disables sending ICMPv6 router-advertisement
4326 * messages. The '<em>no</em>' option implies to enable sending ICMPv6
4327 * router-advertisement messages.
4329 * <em>[no] ra-suppress-link-layer</em> - Indicates not to include the
4330 * optional source link-layer address in the ICMPv6 router-advertisement
4331 * messages. Default is to include the optional source link-layer address
4332 * and the '<em>no</em>' option returns it to this default state.
4334 * <em>[no] ra-send-unicast</em> - Use the source address of the
4335 * router-solicitation message if availiable. The default is to use
4336 * multicast address of all nodes, and the '<em>no</em>' option returns
4337 * it to this default state.
4339 * <em>[no] ra-lifetime <lifetime></em> - Advertises the lifetime of a
4340 * default router in ICMPv6 router-advertisement messages. The range is
4341 * from 0 to 9000 seconds. '<em><lifetime></em>' must be greater than
4342 * '<em><max-interval></em>'. The default value is 600 seconds and the
4343 * '<em>no</em>' option returns it to this default value.
4345 * <em>[no] ra-initial <cnt> <interval></em> - Number of initial ICMPv6
4346 * router-advertisement messages sent and the interval between each
4347 * message. Range for count is 1 - 3 and default is 3. Range for interval
4348 * is 1 to 16 seconds, and default is 16 seconds. The '<em>no</em>' option
4349 * returns both to their default value.
4351 * <em>[no] ra-interval <max-interval> [<min-interval>]</em> - Configures the
4352 * interval between sending ICMPv6 router-advertisement messages. The
4353 * range for max-interval is from 4 to 200 seconds. min-interval can not
4354 * be more than 75% of max-interval. If not set, min-interval will be
4355 * set to 75% of max-interval. The range for min-interval is from 3 to
4356 * 150 seconds. The '<em>no</em>' option returns both to their default
4359 * <em>[no] ra-cease</em> - Cease sending ICMPv6 router-advertisement messages.
4360 * The '<em>no</em>' options implies to start (or restart) sending
4361 * ICMPv6 router-advertisement messages.
4364 * <b>Format 2 - Prefix Options:</b>
4366 * '<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>'
4370 * <em>no</em> - All additional flags are ignored and the prefix is deleted.
4372 * <em><valid-lifetime> <pref-lifetime></em> - '<em><valid-lifetime></em>' is the
4373 * length of time in seconds during what the prefix is valid for the purpose of
4374 * on-link determination. Range is 7203 to 2592000 seconds and default is 2592000
4375 * seconds (30 days). '<em><pref-lifetime></em>' is the prefered-lifetime and is the
4376 * length of time in seconds during what addresses generated from the prefix remain
4377 * preferred. Range is 0 to 604800 seconds and default is 604800 seconds (7 days).
4379 * <em>infinite</em> - Both '<em><valid-lifetime></em>' and '<em><<pref-lifetime></em>'
4380 * are inifinte, no timeout.
4382 * <em>no-advertise</em> - Do not send full router address in prefix
4383 * advertisement. Default is to advertise (i.e. - This flag is off by default).
4385 * <em>off-link</em> - Prefix is off-link, clear L-bit in packet. Default is on-link
4386 * (i.e. - This flag is off and L-bit in packet is set by default and this prefix can
4387 * be used for on-link determination). '<em>no-onlink</em>' also controls the L-bit.
4389 * <em>no-autoconfig</em> - Do not use prefix for autoconfiguration, clear A-bit in packet.
4390 * Default is autoconfig (i.e. - This flag is off and A-bit in packet is set by default.
4392 * <em>no-onlink</em> - Do not use prefix for onlink determination, clear L-bit in packet.
4393 * Default is on-link (i.e. - This flag is off and L-bit in packet is set by default and
4394 * this prefix can be used for on-link determination). '<em>off-link</em>' also controls
4398 * <b>Format 3: - Default of Prefix:</b>
4400 * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> default</b></em>'
4402 * When a new prefix is added (or existing one is being overwritten) <em>default</em>
4403 * uses default values for the prefix. If <em>no</em> is used, the <em>default</em>
4404 * is ignored and the prefix is deleted.
4408 * Example of how set a router advertisement option:
4409 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 ra-interval 100 20}
4410 * Example of how to add a prefix:
4411 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 prefix fe80::fe:28ff:fe9c:75b3/64 infinite no-advertise}
4412 * Example of how to delete a prefix:
4413 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 no prefix fe80::fe:28ff:fe9c:75b3/64}
4416 VLIB_CLI_COMMAND (ip6_nd_command, static) =
4419 .short_help = "ip6 nd <interface> ...",
4420 .function = ip6_neighbor_cmd,
4425 ip6_neighbor_set_link_local_address (vlib_main_t * vm, u32 sw_if_index,
4426 ip6_address_t * address)
4428 clib_error_t *error = 0;
4429 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4431 ip6_radv_t *radv_info;
4432 vnet_main_t *vnm = vnet_get_main ();
4433 ip6_ll_prefix_t pfx = { 0, };
4435 if (!ip6_address_is_link_local_unicast (address))
4436 return (error = clib_error_return (0, "address not link-local",
4437 format_unformat_error));
4439 /* call enable ipv6 */
4440 enable_ip6_interface (vm, sw_if_index);
4442 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4446 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4448 pfx.ilp_sw_if_index = sw_if_index;
4450 pfx.ilp_addr = radv_info->link_local_address;
4451 ip6_ll_table_entry_delete (&pfx);
4453 pfx.ilp_addr = *address;
4454 ip6_ll_table_entry_update (&pfx, FIB_ROUTE_PATH_LOCAL);
4456 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4457 radv_info->link_local_address = *address;
4461 vnm->api_errno = VNET_API_ERROR_IP6_NOT_ENABLED;
4462 error = clib_error_return (0, "ip6 not enabled for interface",
4463 format_unformat_error);
4469 * @brief callback when an interface address is added or deleted
4472 ip6_neighbor_add_del_interface_address (ip6_main_t * im,
4475 ip6_address_t * address,
4477 u32 if_address_index, u32 is_delete)
4479 vnet_main_t *vnm = vnet_get_main ();
4480 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4482 vlib_main_t *vm = vnm->vlib_main;
4483 ip6_radv_t *radv_info;
4486 /* create solicited node multicast address for this interface adddress */
4487 ip6_set_solicited_node_multicast_address (&a, 0);
4489 a.as_u8[0xd] = address->as_u8[0xd];
4490 a.as_u8[0xe] = address->as_u8[0xe];
4491 a.as_u8[0xf] = address->as_u8[0xf];
4495 /* try to create radv_info - does nothing if ipv6 already enabled */
4496 enable_ip6_interface (vm, sw_if_index);
4498 /* look up the radv_t information for this interface */
4499 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
4501 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4505 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4508 if (!ip6_address_is_link_local_unicast (address))
4509 radv_info->ref_count++;
4511 ip6_neighbor_add_mld_prefix (radv_info, &a);
4518 /* look up the radv_t information for this interface */
4519 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
4521 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4526 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4528 ip6_neighbor_del_mld_prefix (radv_info, &a);
4530 /* if interface up send MLDP "report" */
4531 radv_info->all_routers_mcast = 0;
4534 if (!ip6_address_is_link_local_unicast (address))
4535 radv_info->ref_count--;
4537 /* Ensure that IPv6 is disabled, and LL removed after ref_count reaches 0 */
4538 disable_ip6_interface (vm, sw_if_index);
4543 ip6_set_neighbor_limit (u32 neighbor_limit)
4545 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4547 nm->limit_neighbor_cache_size = neighbor_limit;
4552 ip6_neighbor_table_bind (ip6_main_t * im,
4555 u32 new_fib_index, u32 old_fib_index)
4557 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4558 ip6_neighbor_t *n = NULL;
4559 u32 i, *to_re_add = 0;
4562 pool_foreach (n, nm->neighbor_pool,
4564 if (n->key.sw_if_index == sw_if_index)
4565 vec_add1 (to_re_add, n - nm->neighbor_pool);
4569 for (i = 0; i < vec_len (to_re_add); i++)
4571 n = pool_elt_at_index (nm->neighbor_pool, to_re_add[i]);
4572 ip6_neighbor_adj_fib_remove (n, old_fib_index);
4573 ip6_neighbor_adj_fib_add (n, new_fib_index);
4575 vec_free (to_re_add);
4578 static clib_error_t *
4579 ip6_neighbor_init (vlib_main_t * vm)
4581 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4582 ip6_main_t *im = &ip6_main;
4584 mhash_init (&nm->neighbor_index_by_key,
4585 /* value size */ sizeof (uword),
4586 /* key size */ sizeof (ip6_neighbor_key_t));
4588 icmp6_register_type (vm, ICMP6_neighbor_solicitation,
4589 ip6_icmp_neighbor_solicitation_node.index);
4590 icmp6_register_type (vm, ICMP6_neighbor_advertisement,
4591 ip6_icmp_neighbor_advertisement_node.index);
4592 icmp6_register_type (vm, ICMP6_router_solicitation,
4593 ip6_icmp_router_solicitation_node.index);
4594 icmp6_register_type (vm, ICMP6_router_advertisement,
4595 ip6_icmp_router_advertisement_node.index);
4597 /* handler node for ip6 neighbor discovery events and timers */
4598 vlib_register_node (vm, &ip6_icmp_neighbor_discovery_event_node);
4600 /* add call backs */
4601 ip6_add_del_interface_address_callback_t cb;
4602 clib_memset (&cb, 0x0, sizeof (ip6_add_del_interface_address_callback_t));
4604 /* when an interface address changes... */
4605 cb.function = ip6_neighbor_add_del_interface_address;
4606 cb.function_opaque = 0;
4607 vec_add1 (im->add_del_interface_address_callbacks, cb);
4609 ip6_table_bind_callback_t cbt;
4610 cbt.function = ip6_neighbor_table_bind;
4611 cbt.function_opaque = 0;
4612 vec_add1 (im->table_bind_callbacks, cbt);
4614 mhash_init (&nm->pending_resolutions_by_address,
4615 /* value size */ sizeof (uword),
4616 /* key size */ sizeof (ip6_address_t));
4618 mhash_init (&nm->mac_changes_by_address,
4619 /* value size */ sizeof (uword),
4620 /* key size */ sizeof (ip6_address_t));
4622 /* default, configurable */
4623 nm->limit_neighbor_cache_size = 50000;
4625 nm->wc_ip6_nd_publisher_node = (uword) ~ 0;
4627 nm->ip6_ra_publisher_node = (uword) ~ 0;
4630 /* $$$$ Hack fix for today */
4631 vec_validate_init_empty
4632 (im->discover_neighbor_next_index_by_hw_if_index, 32, 0 /* drop */ );
4638 VLIB_INIT_FUNCTION (ip6_neighbor_init);
4642 vnet_register_ip6_neighbor_resolution_event (vnet_main_t * vnm,
4645 uword type_opaque, uword data)
4647 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4648 ip6_address_t *address = address_arg;
4650 pending_resolution_t *pr;
4652 pool_get (nm->pending_resolutions, pr);
4654 pr->next_index = ~0;
4655 pr->node_index = node_index;
4656 pr->type_opaque = type_opaque;
4659 p = mhash_get (&nm->pending_resolutions_by_address, address);
4662 /* Insert new resolution at the head of the list */
4663 pr->next_index = p[0];
4664 mhash_unset (&nm->pending_resolutions_by_address, address, 0);
4667 mhash_set (&nm->pending_resolutions_by_address, address,
4668 pr - nm->pending_resolutions, 0 /* old value */ );
4672 vnet_add_del_ip6_nd_change_event (vnet_main_t * vnm,
4673 ip6_nd_change_event_cb_t data_callback,
4677 uword type_opaque, uword data, int is_add)
4679 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4680 ip6_address_t *address = address_arg;
4682 /* Try to find an existing entry */
4683 u32 *first = (u32 *) mhash_get (&nm->mac_changes_by_address, address);
4685 pending_resolution_t *mc;
4686 while (p && *p != ~0)
4688 mc = pool_elt_at_index (nm->mac_changes, *p);
4689 if (mc->node_index == node_index && mc->type_opaque == type_opaque
4692 p = &mc->next_index;
4695 int found = p && *p != ~0;
4699 return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
4701 pool_get (nm->mac_changes, mc);
4703 *mc = (pending_resolution_t)
4706 .node_index = node_index,
4707 .type_opaque = type_opaque,
4709 .data_callback = data_callback,
4714 /* Insert new resolution at the end of the list */
4715 u32 new_idx = mc - nm->mac_changes;
4719 mhash_set (&nm->mac_changes_by_address, address, new_idx, 0);
4724 return VNET_API_ERROR_NO_SUCH_ENTRY;
4726 /* Clients may need to clean up pool entries, too */
4728 (data_callback) (mc->data, NULL /* no new mac addrs */ , 0, NULL);
4730 /* Remove the entry from the list and delete the entry */
4731 *p = mc->next_index;
4732 pool_put (nm->mac_changes, mc);
4734 /* Remove from hash if we deleted the last entry */
4735 if (*p == ~0 && p == first)
4736 mhash_unset (&nm->mac_changes_by_address, address, 0);
4742 vnet_ip6_nd_term (vlib_main_t * vm,
4743 vlib_node_runtime_t * node,
4745 ethernet_header_t * eth,
4746 ip6_header_t * ip, u32 sw_if_index, u16 bd_index)
4748 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4749 icmp6_neighbor_solicitation_or_advertisement_header_t *ndh;
4752 mac_address_from_bytes (&mac, eth->src_address);
4753 ndh = ip6_next_header (ip);
4754 if (ndh->icmp.type != ICMP6_neighbor_solicitation &&
4755 ndh->icmp.type != ICMP6_neighbor_advertisement)
4758 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
4759 (p0->flags & VLIB_BUFFER_IS_TRACED)))
4761 u8 *t0 = vlib_add_trace (vm, node, p0,
4762 sizeof (icmp6_input_trace_t));
4763 clib_memcpy (t0, ip, sizeof (icmp6_input_trace_t));
4766 /* Check if anyone want ND events for L2 BDs */
4768 (nm->wc_ip6_nd_publisher_node != (uword) ~ 0
4769 && !ip6_address_is_link_local_unicast (&ip->src_address)))
4771 vnet_nd_wc_publish (sw_if_index, &mac, &ip->src_address);
4774 /* Check if MAC entry exsist for solicited target IP */
4775 if (ndh->icmp.type == ICMP6_neighbor_solicitation)
4777 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *opt;
4778 l2_bridge_domain_t *bd_config;
4781 opt = (void *) (ndh + 1);
4782 if ((opt->header.type !=
4783 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address) ||
4784 (opt->header.n_data_u64s != 1))
4785 return 0; /* source link layer address option not present */
4787 bd_config = vec_elt_at_index (l2input_main.bd_configs, bd_index);
4789 (u8 *) hash_get_mem (bd_config->mac_by_ip6, &ndh->target_address);
4791 { /* found ip-mac entry, generate eighbor advertisement response */
4793 vlib_node_runtime_t *error_node =
4794 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
4795 ip->dst_address = ip->src_address;
4796 ip->src_address = ndh->target_address;
4797 ip->hop_limit = 255;
4799 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
4800 clib_memcpy (opt->ethernet_address, macp, 6);
4801 ndh->icmp.type = ICMP6_neighbor_advertisement;
4802 ndh->advertisement_flags = clib_host_to_net_u32
4803 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED |
4804 ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
4805 ndh->icmp.checksum = 0;
4806 ndh->icmp.checksum =
4807 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip, &bogus_length);
4808 clib_memcpy (eth->dst_address, eth->src_address, 6);
4809 clib_memcpy (eth->src_address, macp, 6);
4810 vlib_error_count (vm, error_node->node_index,
4811 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX, 1);
4821 ip6_neighbor_proxy_add_del (u32 sw_if_index, ip6_address_t * addr, u8 is_del)
4825 fib_prefix_t pfx = {
4827 .fp_proto = FIB_PROTOCOL_IP6,
4832 ip46_address_t nh = {
4836 fib_index = ip6_fib_table_get_index_for_sw_if_index (sw_if_index);
4838 if (~0 == fib_index)
4839 return VNET_API_ERROR_NO_SUCH_FIB;
4843 fib_table_entry_path_remove (fib_index,
4845 FIB_SOURCE_IP6_ND_PROXY,
4849 ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
4850 /* flush the ND cache of this address if it's there */
4851 vnet_unset_ip6_ethernet_neighbor (vlib_get_main (), sw_if_index, addr);
4855 fib_table_entry_path_add (fib_index,
4857 FIB_SOURCE_IP6_ND_PROXY,
4858 FIB_ENTRY_FLAG_NONE,
4862 ~0, 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
4867 static clib_error_t *
4868 set_ip6_nd_proxy_cmd (vlib_main_t * vm,
4869 unformat_input_t * input, vlib_cli_command_t * cmd)
4871 vnet_main_t *vnm = vnet_get_main ();
4872 clib_error_t *error = 0;
4877 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4879 /* get the rest of the command */
4880 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
4882 if (unformat (input, "%U", unformat_ip6_address, &addr))
4884 else if (unformat (input, "delete") || unformat (input, "del"))
4887 return (unformat_parse_error (input));
4891 ip6_neighbor_proxy_add_del (sw_if_index, &addr, is_del);
4897 VLIB_CLI_COMMAND (set_ip6_nd_proxy_command, static) =
4899 .path = "set ip6 nd proxy",
4900 .short_help = "set ip6 nd proxy <HOST> <INTERFACE>",
4901 .function = set_ip6_nd_proxy_cmd,
4906 ethernet_ndp_change_mac (u32 sw_if_index)
4908 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4913 pool_foreach (n, nm->neighbor_pool,
4915 if (n->key.sw_if_index == sw_if_index)
4917 adj_nbr_walk_nh6 (sw_if_index,
4918 &n->key.ip6_address,
4919 ip6_nd_mk_complete_walk, n);
4924 ai = adj_glean_get (FIB_PROTOCOL_IP6, sw_if_index);
4926 if (ADJ_INDEX_INVALID != ai)
4927 adj_glean_update_rewrite (ai);
4931 send_ip6_na (vlib_main_t * vm, u32 sw_if_index)
4933 ip6_main_t *i6m = &ip6_main;
4934 ip6_address_t *ip6_addr = ip6_interface_first_address (i6m, sw_if_index);
4936 send_ip6_na_w_addr (vm, ip6_addr, sw_if_index);
4940 send_ip6_na_w_addr (vlib_main_t * vm,
4941 const ip6_address_t * ip6_addr, u32 sw_if_index)
4943 ip6_main_t *i6m = &ip6_main;
4944 vnet_main_t *vnm = vnet_get_main ();
4945 u8 *rewrite, rewrite_len;
4946 vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
4952 ("Sending unsolicitated NA IP6 address %U on sw_if_idex %d",
4953 format_ip6_address, ip6_addr, sw_if_index);
4955 /* Form unsolicited neighbor advertisement packet from NS pkt template */
4958 icmp6_neighbor_solicitation_header_t *h =
4959 vlib_packet_template_get_packet (vm,
4960 &i6m->discover_neighbor_packet_template,
4965 ip6_set_reserved_multicast_address (&h->ip.dst_address,
4966 IP6_MULTICAST_SCOPE_link_local,
4967 IP6_MULTICAST_GROUP_ID_all_hosts);
4968 h->ip.src_address = ip6_addr[0];
4969 h->neighbor.icmp.type = ICMP6_neighbor_advertisement;
4970 h->neighbor.target_address = ip6_addr[0];
4971 h->neighbor.advertisement_flags = clib_host_to_net_u32
4972 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
4973 h->link_layer_option.header.type =
4974 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
4975 clib_memcpy (h->link_layer_option.ethernet_address,
4976 hi->hw_address, vec_len (hi->hw_address));
4977 h->neighbor.icmp.checksum =
4978 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
4979 ASSERT (bogus_length == 0);
4981 /* Setup MAC header with IP6 Etype and mcast DMAC */
4982 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
4983 ip6_multicast_ethernet_address (dst_address,
4984 IP6_MULTICAST_GROUP_ID_all_hosts);
4986 ethernet_build_rewrite (vnm, sw_if_index, VNET_LINK_IP6, dst_address);
4987 rewrite_len = vec_len (rewrite);
4988 vlib_buffer_advance (b, -rewrite_len);
4989 ethernet_header_t *e = vlib_buffer_get_current (b);
4990 clib_memcpy (e->dst_address, rewrite, rewrite_len);
4993 /* Send unsolicited ND advertisement packet out the specified interface */
4994 vnet_buffer (b)->sw_if_index[VLIB_RX] =
4995 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
4996 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
4997 u32 *to_next = vlib_frame_vector_args (f);
5000 vlib_put_frame_to_node (vm, hi->output_node_index, f);
5005 * fd.io coding-style-patch-verification: ON
5008 * eval: (c-set-style "gnu")