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 entries 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 destintation 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;
1026 if (unformat (input, "verbose"))
1029 /* Filter entries by interface if given. */
1031 (void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index);
1033 ns = ip6_neighbors_entries (sw_if_index);
1037 * Show the entire table if it's not too big, otherwise just
1038 * show the size of the table.
1040 if (vec_len (ns) < 50)
1044 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, 0);
1047 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, n);
1052 (vm, "There are %u ip6 neighbors, "
1053 "'show ip6 neighbors verbose' to display the entire table...",
1058 vlib_cli_output (vm, "No ip6 neighbors");
1064 * This command is used to display the adjacent IPv6 hosts found via
1065 * neighbor discovery. Optionally, limit the output to the specified
1069 * Example of how to display the IPv6 neighbor adjacency table:
1070 * @cliexstart{show ip6 neighbors}
1071 * Time Address Flags Link layer Interface
1072 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
1073 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
1074 * 886.6654 ::1:1:c:0:9 S 02:fe:e4:45:27:5b GigabitEthernet3/0/0
1076 * Example of how to display the IPv6 neighbor adjacency table for given interface:
1077 * @cliexstart{show ip6 neighbors GigabitEthernet2/0/0}
1078 * Time Address Flags Link layer Interface
1079 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
1080 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
1084 VLIB_CLI_COMMAND (show_ip6_neighbors_command, static) = {
1085 .path = "show ip6 neighbors",
1086 .function = show_ip6_neighbors,
1087 .short_help = "show ip6 neighbors [<interface>]",
1091 static clib_error_t *
1092 set_ip6_neighbor (vlib_main_t * vm,
1093 unformat_input_t * input, vlib_cli_command_t * cmd)
1095 ip_neighbor_flags_t flags = IP_NEIGHBOR_FLAG_NONE;
1096 vnet_main_t *vnm = vnet_get_main ();
1103 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1105 /* intfc, ip6-address, mac-address */
1106 if (unformat (input, "%U %U %U",
1107 unformat_vnet_sw_interface, vnm, &sw_if_index,
1108 unformat_ip6_address, &addr,
1109 unformat_mac_address_t, &mac))
1112 else if (unformat (input, "delete") || unformat (input, "del"))
1114 else if (unformat (input, "static"))
1115 flags |= IP_NEIGHBOR_FLAG_STATIC;
1116 else if (unformat (input, "no-fib-entry"))
1117 flags |= IP_NEIGHBOR_FLAG_NO_FIB_ENTRY;
1123 return clib_error_return (0, "Missing interface, ip6 or hw address");
1126 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index, &addr, &mac, flags);
1128 vnet_unset_ip6_ethernet_neighbor (vm, sw_if_index, &addr);
1133 * This command is used to manually add an entry to the IPv6 neighbor
1134 * adjacency table. Optionally, the entry can be added as static. It is
1135 * also used to remove an entry from the table. Use the '<em>show ip6
1136 * neighbors</em>' command to display all learned and manually entered entries.
1139 * Example of how to add a static entry to the IPv6 neighbor adjacency table:
1140 * @cliexcmd{set ip6 neighbor GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b static}
1141 * Example of how to delete an entry from the IPv6 neighbor adjacency table:
1142 * @cliexcmd{set ip6 neighbor del GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b}
1145 VLIB_CLI_COMMAND (set_ip6_neighbor_command, static) =
1147 .path = "set ip6 neighbor",
1148 .function = set_ip6_neighbor,
1149 .short_help = "set ip6 neighbor [del] <interface> <ip6-address> <mac-address> [static]",
1155 ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP,
1156 ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY,
1157 ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
1158 } icmp6_neighbor_solicitation_or_advertisement_next_t;
1160 static_always_inline uword
1161 icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
1162 vlib_node_runtime_t * node,
1163 vlib_frame_t * frame,
1164 uword is_solicitation)
1166 vnet_main_t *vnm = vnet_get_main ();
1167 ip6_main_t *im = &ip6_main;
1168 uword n_packets = frame->n_vectors;
1169 u32 *from, *to_next;
1170 u32 n_left_from, n_left_to_next, next_index, n_advertisements_sent;
1171 icmp6_neighbor_discovery_option_type_t option_type;
1172 vlib_node_runtime_t *error_node =
1173 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1176 from = vlib_frame_vector_args (frame);
1177 n_left_from = n_packets;
1178 next_index = node->cached_next_index;
1180 if (node->flags & VLIB_NODE_FLAG_TRACE)
1181 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1183 sizeof (icmp6_input_trace_t));
1187 ? ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address
1188 : ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address);
1189 n_advertisements_sent = 0;
1191 while (n_left_from > 0)
1193 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1195 while (n_left_from > 0 && n_left_to_next > 0)
1199 icmp6_neighbor_solicitation_or_advertisement_header_t *h0;
1200 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1201 u32 bi0, options_len0, sw_if_index0, next0, error0;
1202 u32 ip6_sadd_link_local, ip6_sadd_unspecified;
1206 bi0 = to_next[0] = from[0];
1211 n_left_to_next -= 1;
1213 p0 = vlib_get_buffer (vm, bi0);
1214 ip0 = vlib_buffer_get_current (p0);
1215 h0 = ip6_next_header (ip0);
1217 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1219 error0 = ICMP6_ERROR_NONE;
1220 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1221 ip6_sadd_link_local =
1222 ip6_address_is_link_local_unicast (&ip0->src_address);
1223 ip6_sadd_unspecified =
1224 ip6_address_is_unspecified (&ip0->src_address);
1226 /* Check that source address is unspecified, link-local or else on-link. */
1227 if (!ip6_sadd_unspecified && !ip6_sadd_link_local)
1229 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1231 if (ADJ_INDEX_INVALID != src_adj_index0)
1233 ip_adjacency_t *adj0 = adj_get (src_adj_index0);
1235 /* Allow all realistic-looking rewrite adjacencies to pass */
1236 ni0 = adj0->lookup_next_index;
1237 is_rewrite0 = (ni0 >= IP_LOOKUP_NEXT_ARP) &&
1238 (ni0 < IP6_LOOKUP_N_NEXT);
1240 error0 = ((adj0->rewrite_header.sw_if_index != sw_if_index0
1243 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK
1249 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK;
1253 o0 = (void *) (h0 + 1);
1254 o0 = ((options_len0 == 8 && o0->header.type == option_type
1255 && o0->header.n_data_u64s == 1) ? o0 : 0);
1257 /* If src address unspecified or link local, donot learn neighbor MAC */
1258 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1259 !ip6_sadd_unspecified))
1261 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1264 &h0->target_address,
1266 o0->ethernet_address,
1267 IP_NEIGHBOR_FLAG_NONE);
1270 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1272 /* Check that target address is local to this router. */
1273 fib_node_index_t fei;
1277 ip6_fib_table_get_index_for_sw_if_index (sw_if_index0);
1279 if (~0 == fib_index)
1281 error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1285 if (ip6_address_is_link_local_unicast (&h0->target_address))
1287 fei = ip6_fib_table_lookup_exact_match
1288 (ip6_ll_fib_get (sw_if_index0),
1289 &h0->target_address, 128);
1293 fei = ip6_fib_table_lookup_exact_match (fib_index,
1294 &h0->target_address,
1298 if (FIB_NODE_INDEX_INVALID == fei)
1300 /* The target address is not in the FIB */
1302 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1306 if (FIB_ENTRY_FLAG_LOCAL &
1307 fib_entry_get_flags_for_source (fei,
1308 FIB_SOURCE_INTERFACE))
1310 /* It's an address that belongs to one of our interfaces
1314 if (fib_entry_is_sourced
1315 (fei, FIB_SOURCE_IP6_ND_PROXY) ||
1316 fib_entry_is_sourced (fei, FIB_SOURCE_IP6_ND))
1318 /* The address was added by IPv6 Proxy ND config.
1319 * We should only respond to these if the NS arrived on
1320 * the link that has a matching covering prefix */
1325 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1331 if (is_solicitation)
1332 next0 = (error0 != ICMP6_ERROR_NONE
1333 ? ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP
1334 : ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY);
1338 error0 = error0 == ICMP6_ERROR_NONE ?
1339 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_RX : error0;
1342 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1344 vnet_sw_interface_t *sw_if0;
1345 ethernet_interface_t *eth_if0;
1346 ethernet_header_t *eth0;
1348 /* dst address is either source address or the all-nodes mcast addr */
1349 if (!ip6_sadd_unspecified)
1350 ip0->dst_address = ip0->src_address;
1352 ip6_set_reserved_multicast_address (&ip0->dst_address,
1353 IP6_MULTICAST_SCOPE_link_local,
1354 IP6_MULTICAST_GROUP_ID_all_hosts);
1356 ip0->src_address = h0->target_address;
1357 ip0->hop_limit = 255;
1358 h0->icmp.type = ICMP6_neighbor_advertisement;
1360 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1361 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1363 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1366 clib_memcpy (o0->ethernet_address, eth_if0->address, 6);
1368 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
1371 h0->advertisement_flags = clib_host_to_net_u32
1372 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED
1373 | ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
1375 h0->icmp.checksum = 0;
1377 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1379 ASSERT (bogus_length == 0);
1381 /* Reuse current MAC header, copy SMAC to DMAC and
1382 * interface MAC to SMAC */
1383 vlib_buffer_advance (p0, -ethernet_buffer_header_size (p0));
1384 eth0 = vlib_buffer_get_current (p0);
1385 clib_memcpy (eth0->dst_address, eth0->src_address, 6);
1387 clib_memcpy (eth0->src_address, eth_if0->address, 6);
1389 /* Setup input and output sw_if_index for packet */
1390 ASSERT (vnet_buffer (p0)->sw_if_index[VLIB_RX] == sw_if_index0);
1391 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1392 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1393 vnet_main.local_interface_sw_if_index;
1395 n_advertisements_sent++;
1398 p0->error = error_node->errors[error0];
1400 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1401 to_next, n_left_to_next,
1405 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1408 /* Account for advertisements sent. */
1409 vlib_error_count (vm, error_node->node_index,
1410 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX,
1411 n_advertisements_sent);
1413 return frame->n_vectors;
1416 /* for "syslogging" - use elog for now */
1417 #define foreach_log_level \
1418 _ (DEBUG, "DEBUG") \
1419 _ (INFO, "INFORMATION") \
1420 _ (NOTICE, "NOTICE") \
1421 _ (WARNING, "WARNING") \
1423 _ (CRIT, "CRITICAL") \
1424 _ (ALERT, "ALERT") \
1425 _ (EMERG, "EMERGENCY")
1429 #define _(f,s) LOG_##f,
1434 static char *log_level_strings[] = {
1440 static int logmask = 1 << LOG_DEBUG;
1443 ip6_neighbor_syslog (vlib_main_t * vm, int priority, char *fmt, ...)
1445 /* just use elog for now */
1449 if ((priority > LOG_EMERG) || !(logmask & (1 << priority)))
1455 what = va_format (0, fmt, &va);
1457 ELOG_TYPE_DECLARE (e) =
1459 .format = "ip6 nd: (%s): %s",.format_args = "T4T4",};
1464 ed = ELOG_DATA (&vm->elog_main, e);
1465 ed->s[0] = elog_string (&vm->elog_main, log_level_strings[priority]);
1466 ed->s[1] = elog_string (&vm->elog_main, (char *) what);
1473 call_ip6_neighbor_callbacks (void *data,
1474 _vnet_ip6_neighbor_function_list_elt_t * elt)
1476 clib_error_t *error = 0;
1480 error = elt->fp (data);
1483 elt = elt->next_ip6_neighbor_function;
1489 /* ipv6 neighbor discovery - router advertisements */
1492 ICMP6_ROUTER_SOLICITATION_NEXT_DROP,
1493 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW,
1494 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX,
1495 ICMP6_ROUTER_SOLICITATION_N_NEXT,
1496 } icmp6_router_solicitation_or_advertisement_next_t;
1498 static_always_inline uword
1499 icmp6_router_solicitation (vlib_main_t * vm,
1500 vlib_node_runtime_t * node, vlib_frame_t * frame)
1502 vnet_main_t *vnm = vnet_get_main ();
1503 ip6_main_t *im = &ip6_main;
1504 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1505 uword n_packets = frame->n_vectors;
1506 u32 *from, *to_next;
1507 u32 n_left_from, n_left_to_next, next_index;
1508 u32 n_advertisements_sent = 0;
1511 icmp6_neighbor_discovery_option_type_t option_type;
1513 vlib_node_runtime_t *error_node =
1514 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1516 from = vlib_frame_vector_args (frame);
1517 n_left_from = n_packets;
1518 next_index = node->cached_next_index;
1520 if (node->flags & VLIB_NODE_FLAG_TRACE)
1521 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1523 sizeof (icmp6_input_trace_t));
1525 /* source may append his LL address */
1526 option_type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1528 while (n_left_from > 0)
1530 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1532 while (n_left_from > 0 && n_left_to_next > 0)
1536 ip6_radv_t *radv_info = 0;
1538 icmp6_neighbor_discovery_header_t *h0;
1539 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1541 u32 bi0, options_len0, sw_if_index0, next0, error0;
1542 u32 is_solicitation = 1, is_dropped = 0;
1543 u32 is_unspecified, is_link_local;
1545 bi0 = to_next[0] = from[0];
1550 n_left_to_next -= 1;
1552 p0 = vlib_get_buffer (vm, bi0);
1553 ip0 = vlib_buffer_get_current (p0);
1554 h0 = ip6_next_header (ip0);
1556 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1557 is_unspecified = ip6_address_is_unspecified (&ip0->src_address);
1559 ip6_address_is_link_local_unicast (&ip0->src_address);
1561 error0 = ICMP6_ERROR_NONE;
1562 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1564 /* check if solicitation (not from nd_timer node) */
1565 if (ip6_address_is_unspecified (&ip0->dst_address))
1566 is_solicitation = 0;
1568 /* Check that source address is unspecified, link-local or else on-link. */
1569 if (!is_unspecified && !is_link_local)
1571 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1573 if (ADJ_INDEX_INVALID != src_adj_index0)
1575 ip_adjacency_t *adj0 = adj_get (src_adj_index0);
1577 error0 = (adj0->rewrite_header.sw_if_index != sw_if_index0
1579 ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK
1584 error0 = ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK;
1588 /* check for source LL option and process */
1589 o0 = (void *) (h0 + 1);
1590 o0 = ((options_len0 == 8
1591 && o0->header.type == option_type
1592 && o0->header.n_data_u64s == 1) ? o0 : 0);
1594 /* if src address unspecified IGNORE any options */
1595 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1596 !is_unspecified && !is_link_local))
1598 vnet_set_ip6_ethernet_neighbor
1601 (mac_address_t *) o0->ethernet_address,
1602 IP_NEIGHBOR_FLAG_NONE);
1605 /* default is to drop */
1606 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1608 if (error0 == ICMP6_ERROR_NONE)
1610 vnet_sw_interface_t *sw_if0;
1611 ethernet_interface_t *eth_if0;
1614 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1615 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1617 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1619 /* only support ethernet interface type for now */
1621 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1624 if (error0 == ICMP6_ERROR_NONE)
1628 /* adjust the sizeof the buffer to just include the ipv6 header */
1629 p0->current_length -=
1631 sizeof (icmp6_neighbor_discovery_header_t));
1633 /* look up the radv_t information for this interface */
1634 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) >
1638 nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1641 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1646 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1649 if (error0 == ICMP6_ERROR_NONE)
1651 f64 now = vlib_time_now (vm);
1653 /* for solicited adverts - need to rate limit */
1654 if (is_solicitation)
1656 if (0 != radv_info->last_radv_time &&
1657 (now - radv_info->last_radv_time) <
1658 MIN_DELAY_BETWEEN_RAS)
1661 radv_info->last_radv_time = now;
1665 icmp6_router_advertisement_header_t rh;
1667 rh.icmp.type = ICMP6_router_advertisement;
1669 rh.icmp.checksum = 0;
1671 rh.current_hop_limit = radv_info->curr_hop_limit;
1672 rh.router_lifetime_in_sec =
1673 clib_host_to_net_u16
1674 (radv_info->adv_router_lifetime_in_sec);
1676 time_in_msec_between_retransmitted_neighbor_solicitations
1678 clib_host_to_net_u32 (radv_info->
1679 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
1680 rh.neighbor_reachable_time_in_msec =
1681 clib_host_to_net_u32 (radv_info->
1682 adv_neighbor_reachable_time_in_msec);
1685 (radv_info->adv_managed_flag) ?
1686 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP :
1689 ((radv_info->adv_other_flag) ?
1690 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP :
1694 u16 payload_length =
1695 sizeof (icmp6_router_advertisement_header_t);
1697 if (vlib_buffer_add_data
1698 (vm, &bi0, (void *) &rh,
1699 sizeof (icmp6_router_advertisement_header_t)))
1701 /* buffer allocation failed, drop the pkt */
1702 error0 = ICMP6_ERROR_ALLOC_FAILURE;
1706 if (radv_info->adv_link_layer_address)
1708 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
1712 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1713 h.header.n_data_u64s = 1;
1715 /* copy ll address */
1716 clib_memcpy (&h.ethernet_address[0],
1717 eth_if0->address, 6);
1719 if (vlib_buffer_add_data
1720 (vm, &bi0, (void *) &h,
1722 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t)))
1724 error0 = ICMP6_ERROR_ALLOC_FAILURE;
1730 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t);
1733 /* add MTU option */
1734 if (radv_info->adv_link_mtu)
1736 icmp6_neighbor_discovery_mtu_option_t h;
1740 clib_host_to_net_u32 (radv_info->adv_link_mtu);
1741 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu;
1742 h.header.n_data_u64s = 1;
1745 sizeof (icmp6_neighbor_discovery_mtu_option_t);
1747 if (vlib_buffer_add_data
1748 (vm, &bi0, (void *) &h,
1750 (icmp6_neighbor_discovery_mtu_option_t)))
1752 error0 = ICMP6_ERROR_ALLOC_FAILURE;
1757 /* add advertised prefix options */
1758 ip6_radv_prefix_t *pr_info;
1761 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
1763 if(pr_info->enabled &&
1764 (!pr_info->decrement_lifetime_flag
1765 || (pr_info->pref_lifetime_expires >0)))
1767 /* advertise this prefix */
1768 icmp6_neighbor_discovery_prefix_information_option_t h;
1770 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information;
1771 h.header.n_data_u64s = (sizeof(icmp6_neighbor_discovery_prefix_information_option_t) >> 3);
1773 h.dst_address_length = pr_info->prefix_len;
1775 h.flags = (pr_info->adv_on_link_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_FLAG_ON_LINK : 0;
1776 h.flags |= (pr_info->adv_autonomous_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_AUTO : 0;
1778 if(radv_info->cease_radv && pr_info->deprecated_prefix_flag)
1780 h.valid_time = clib_host_to_net_u32(MIN_ADV_VALID_LIFETIME);
1781 h.preferred_time = 0;
1785 if(pr_info->decrement_lifetime_flag)
1787 pr_info->adv_valid_lifetime_in_secs = ((pr_info->valid_lifetime_expires > now)) ?
1788 (pr_info->valid_lifetime_expires - now) : 0;
1790 pr_info->adv_pref_lifetime_in_secs = ((pr_info->pref_lifetime_expires > now)) ?
1791 (pr_info->pref_lifetime_expires - now) : 0;
1794 h.valid_time = clib_host_to_net_u32(pr_info->adv_valid_lifetime_in_secs);
1795 h.preferred_time = clib_host_to_net_u32(pr_info->adv_pref_lifetime_in_secs) ;
1799 clib_memcpy(&h.dst_address, &pr_info->prefix, sizeof(ip6_address_t));
1801 payload_length += sizeof( icmp6_neighbor_discovery_prefix_information_option_t);
1803 if (vlib_buffer_add_data
1804 (vm, &bi0, (void *)&h,
1805 sizeof(icmp6_neighbor_discovery_prefix_information_option_t)))
1807 error0 = ICMP6_ERROR_ALLOC_FAILURE;
1815 /* add additional options before here */
1817 /* finish building the router advertisement... */
1818 if (!is_unspecified && radv_info->send_unicast)
1820 ip0->dst_address = ip0->src_address;
1824 /* target address is all-nodes mcast addr */
1825 ip6_set_reserved_multicast_address
1827 IP6_MULTICAST_SCOPE_link_local,
1828 IP6_MULTICAST_GROUP_ID_all_hosts);
1831 /* source address MUST be the link-local address */
1832 ip0->src_address = radv_info->link_local_address;
1834 ip0->hop_limit = 255;
1835 ip0->payload_length =
1836 clib_host_to_net_u16 (payload_length);
1838 icmp6_router_advertisement_header_t *rh0 =
1839 (icmp6_router_advertisement_header_t *) (ip0 + 1);
1840 rh0->icmp.checksum =
1841 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1843 ASSERT (bogus_length == 0);
1845 /* setup output if and adjacency */
1846 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1847 vnet_main.local_interface_sw_if_index;
1849 if (is_solicitation)
1851 ethernet_header_t *eth0;
1852 /* Reuse current MAC header, copy SMAC to DMAC and
1853 * interface MAC to SMAC */
1854 vlib_buffer_reset (p0);
1855 eth0 = vlib_buffer_get_current (p0);
1856 clib_memcpy (eth0->dst_address, eth0->src_address,
1858 clib_memcpy (eth0->src_address, eth_if0->address,
1861 is_dropped ? next0 :
1862 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX;
1863 vnet_buffer (p0)->sw_if_index[VLIB_TX] =
1868 adj_index0 = radv_info->mcast_adj_index;
1869 if (adj_index0 == 0)
1870 error0 = ICMP6_ERROR_DST_LOOKUP_MISS;
1874 is_dropped ? next0 :
1875 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW;
1876 vnet_buffer (p0)->ip.adj_index[VLIB_TX] =
1880 p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
1882 radv_info->n_solicitations_dropped += is_dropped;
1883 radv_info->n_solicitations_rcvd += is_solicitation;
1885 if ((error0 == ICMP6_ERROR_NONE) && !is_dropped)
1887 radv_info->n_advertisements_sent++;
1888 n_advertisements_sent++;
1895 p0->error = error_node->errors[error0];
1897 if (error0 != ICMP6_ERROR_NONE)
1898 vlib_error_count (vm, error_node->node_index, error0, 1);
1900 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1901 to_next, n_left_to_next,
1906 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1909 /* Account for router advertisements sent. */
1910 vlib_error_count (vm, error_node->node_index,
1911 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_TX,
1912 n_advertisements_sent);
1914 return frame->n_vectors;
1917 /* validate advertised info for consistancy (see RFC-4861 section 6.2.7) - log any inconsistencies, packet will always be dropped */
1918 static_always_inline uword
1919 icmp6_router_advertisement (vlib_main_t * vm,
1920 vlib_node_runtime_t * node, vlib_frame_t * frame)
1922 vnet_main_t *vnm = vnet_get_main ();
1923 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1924 uword n_packets = frame->n_vectors;
1925 u32 *from, *to_next;
1926 u32 n_left_from, n_left_to_next, next_index;
1927 u32 n_advertisements_rcvd = 0;
1929 vlib_node_runtime_t *error_node =
1930 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1932 from = vlib_frame_vector_args (frame);
1933 n_left_from = n_packets;
1934 next_index = node->cached_next_index;
1936 if (node->flags & VLIB_NODE_FLAG_TRACE)
1937 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1939 sizeof (icmp6_input_trace_t));
1941 while (n_left_from > 0)
1943 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1945 while (n_left_from > 0 && n_left_to_next > 0)
1949 ip6_radv_t *radv_info = 0;
1950 icmp6_router_advertisement_header_t *h0;
1951 u32 bi0, options_len0, sw_if_index0, next0, error0;
1953 bi0 = to_next[0] = from[0];
1958 n_left_to_next -= 1;
1960 p0 = vlib_get_buffer (vm, bi0);
1961 ip0 = vlib_buffer_get_current (p0);
1962 h0 = ip6_next_header (ip0);
1964 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1966 error0 = ICMP6_ERROR_NONE;
1967 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1969 /* Check that source address is link-local */
1970 error0 = (!ip6_address_is_link_local_unicast (&ip0->src_address)) ?
1971 ICMP6_ERROR_ROUTER_ADVERTISEMENT_SOURCE_NOT_LINK_LOCAL : error0;
1973 /* default is to drop */
1974 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1976 n_advertisements_rcvd++;
1978 if (error0 == ICMP6_ERROR_NONE)
1980 vnet_sw_interface_t *sw_if0;
1981 ethernet_interface_t *eth_if0;
1983 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1984 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1986 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1988 /* only support ethernet interface type for now */
1990 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1993 if (error0 == ICMP6_ERROR_NONE)
1997 /* look up the radv_t information for this interface */
1998 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) >
2002 nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
2005 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2010 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
2013 if (error0 == ICMP6_ERROR_NONE)
2015 radv_info->keep_sending_rs = 0;
2019 r.sw_if_index = sw_if_index0;
2020 memcpy (&r.router_address, &ip0->src_address, 16);
2021 r.current_hop_limit = h0->current_hop_limit;
2022 r.flags = h0->flags;
2023 r.router_lifetime_in_sec =
2024 clib_net_to_host_u16 (h0->router_lifetime_in_sec);
2025 r.neighbor_reachable_time_in_msec =
2026 clib_net_to_host_u32
2027 (h0->neighbor_reachable_time_in_msec);
2028 r.time_in_msec_between_retransmitted_neighbor_solicitations = clib_net_to_host_u32 (h0->time_in_msec_between_retransmitted_neighbor_solicitations);
2031 /* validate advertised information */
2032 if ((h0->current_hop_limit && radv_info->curr_hop_limit)
2033 && (h0->current_hop_limit !=
2034 radv_info->curr_hop_limit))
2036 ip6_neighbor_syslog (vm, LOG_WARNING,
2037 "our AdvCurHopLimit on %U doesn't agree with %U",
2038 format_vnet_sw_if_index_name,
2045 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP)
2046 != radv_info->adv_managed_flag)
2048 ip6_neighbor_syslog (vm, LOG_WARNING,
2049 "our AdvManagedFlag on %U doesn't agree with %U",
2050 format_vnet_sw_if_index_name,
2057 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP)
2058 != radv_info->adv_other_flag)
2060 ip6_neighbor_syslog (vm, LOG_WARNING,
2061 "our AdvOtherConfigFlag on %U doesn't agree with %U",
2062 format_vnet_sw_if_index_name,
2069 time_in_msec_between_retransmitted_neighbor_solicitations
2071 adv_time_in_msec_between_retransmitted_neighbor_solicitations)
2073 time_in_msec_between_retransmitted_neighbor_solicitations
2075 clib_host_to_net_u32 (radv_info->
2076 adv_time_in_msec_between_retransmitted_neighbor_solicitations)))
2078 ip6_neighbor_syslog (vm, LOG_WARNING,
2079 "our AdvRetransTimer on %U doesn't agree with %U",
2080 format_vnet_sw_if_index_name,
2086 if ((h0->neighbor_reachable_time_in_msec &&
2087 radv_info->adv_neighbor_reachable_time_in_msec) &&
2088 (h0->neighbor_reachable_time_in_msec !=
2089 clib_host_to_net_u32
2090 (radv_info->adv_neighbor_reachable_time_in_msec)))
2092 ip6_neighbor_syslog (vm, LOG_WARNING,
2093 "our AdvReachableTime on %U doesn't agree with %U",
2094 format_vnet_sw_if_index_name,
2100 /* check for MTU or prefix options or .. */
2101 u8 *opt_hdr = (u8 *) (h0 + 1);
2102 while (options_len0 > 0)
2104 icmp6_neighbor_discovery_option_header_t *o0 =
2105 (icmp6_neighbor_discovery_option_header_t *)
2107 int opt_len = o0->n_data_u64s << 3;
2108 icmp6_neighbor_discovery_option_type_t option_type =
2111 if (options_len0 < 2)
2113 ip6_neighbor_syslog (vm, LOG_ERR,
2114 "malformed RA packet on %U from %U",
2115 format_vnet_sw_if_index_name,
2124 ip6_neighbor_syslog (vm, LOG_ERR,
2125 " zero length option in RA on %U from %U",
2126 format_vnet_sw_if_index_name,
2132 else if (opt_len > options_len0)
2134 ip6_neighbor_syslog (vm, LOG_ERR,
2135 "option length in RA packet greater than total length on %U from %U",
2136 format_vnet_sw_if_index_name,
2143 options_len0 -= opt_len;
2146 switch (option_type)
2148 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address:
2150 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
2152 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
2155 if (opt_len < sizeof (*h))
2158 memcpy (r.slla, h->ethernet_address, 6);
2162 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu:
2164 icmp6_neighbor_discovery_mtu_option_t *h =
2165 (icmp6_neighbor_discovery_mtu_option_t
2168 if (opt_len < sizeof (*h))
2171 r.mtu = clib_net_to_host_u32 (h->mtu);
2173 if ((h->mtu && radv_info->adv_link_mtu) &&
2175 clib_host_to_net_u32
2176 (radv_info->adv_link_mtu)))
2178 ip6_neighbor_syslog (vm, LOG_WARNING,
2179 "our AdvLinkMTU on %U doesn't agree with %U",
2180 format_vnet_sw_if_index_name,
2188 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information:
2190 icmp6_neighbor_discovery_prefix_information_option_t
2192 (icmp6_neighbor_discovery_prefix_information_option_t
2195 /* validate advertised prefix options */
2196 ip6_radv_prefix_t *pr_info;
2197 u32 preferred, valid;
2199 if (opt_len < sizeof (*h))
2202 vec_validate (r.prefixes,
2203 vec_len (r.prefixes));
2204 ra_report_prefix_info_t *prefix =
2205 vec_elt_at_index (r.prefixes,
2206 vec_len (r.prefixes) - 1);
2209 clib_net_to_host_u32 (h->preferred_time);
2210 valid = clib_net_to_host_u32 (h->valid_time);
2212 prefix->preferred_time = preferred;
2213 prefix->valid_time = valid;
2214 prefix->flags = h->flags & 0xc0;
2215 prefix->prefix.fp_len = h->dst_address_length;
2216 prefix->prefix.fp_addr.ip6 = h->dst_address;
2217 prefix->prefix.fp_proto = FIB_PROTOCOL_IP6;
2219 /* look for matching prefix - if we our advertising it, it better be consistant */
2221 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
2225 ip6_address_mask_from_width(&mask, pr_info->prefix_len);
2227 if(pr_info->enabled &&
2228 (pr_info->prefix_len == h->dst_address_length) &&
2229 ip6_address_is_equal_masked (&pr_info->prefix, &h->dst_address, &mask))
2232 if(!pr_info->decrement_lifetime_flag &&
2233 valid != pr_info->adv_valid_lifetime_in_secs)
2235 ip6_neighbor_syslog(vm, LOG_WARNING,
2236 "our ADV validlifetime on %U for %U does not agree with %U",
2237 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
2238 format_ip6_address, &h->dst_address);
2240 if(!pr_info->decrement_lifetime_flag &&
2241 preferred != pr_info->adv_pref_lifetime_in_secs)
2243 ip6_neighbor_syslog(vm, LOG_WARNING,
2244 "our ADV preferredlifetime on %U for %U does not agree with %U",
2245 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
2246 format_ip6_address, &h->dst_address);
2264 p0->error = error_node->errors[error0];
2266 if (error0 != ICMP6_ERROR_NONE)
2267 vlib_error_count (vm, error_node->node_index, error0, 1);
2269 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2270 to_next, n_left_to_next,
2274 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2277 /* Account for router advertisements received. */
2278 vlib_error_count (vm, error_node->node_index,
2279 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_RX,
2280 n_advertisements_rcvd);
2282 return frame->n_vectors;
2286 random_f64_from_to (f64 from, f64 to)
2288 static u32 seed = 0;
2289 static u8 seed_set = 0;
2292 seed = random_default_seed ();
2295 return random_f64 (&seed) * (to - from) + from;
2299 get_mac_address (u32 sw_if_index, u8 * address)
2301 vnet_main_t *vnm = vnet_get_main ();
2302 vnet_hw_interface_t *hw_if = vnet_get_sup_hw_interface (vnm, sw_if_index);
2303 if (!hw_if->hw_address)
2305 clib_memcpy (address, hw_if->hw_address, 6);
2309 static inline vlib_buffer_t *
2310 create_buffer_for_rs (vlib_main_t * vm, ip6_radv_t * radv_info)
2314 icmp6_router_solicitation_header_t *rh;
2319 sw_if_index = radv_info->sw_if_index;
2321 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
2323 clib_warning ("buffer allocation failure");
2327 p0 = vlib_get_buffer (vm, bi0);
2328 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (p0);
2329 p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
2331 vnet_buffer (p0)->sw_if_index[VLIB_RX] = sw_if_index;
2332 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index;
2334 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
2336 rh = vlib_buffer_get_current (p0);
2337 p0->current_length = sizeof (*rh);
2339 rh->neighbor.icmp.type = ICMP6_router_solicitation;
2340 rh->neighbor.icmp.code = 0;
2341 rh->neighbor.icmp.checksum = 0;
2342 rh->neighbor.reserved_must_be_zero = 0;
2344 rh->link_layer_option.header.type =
2345 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2346 if (0 != get_mac_address (sw_if_index,
2347 rh->link_layer_option.ethernet_address))
2349 clib_warning ("interface with sw_if_index %u has no mac address",
2351 vlib_buffer_free (vm, &bi0, 1);
2354 rh->link_layer_option.header.n_data_u64s = 1;
2356 payload_length = sizeof (rh->neighbor) + sizeof (u64);
2358 rh->ip.ip_version_traffic_class_and_flow_label =
2359 clib_host_to_net_u32 (0x6 << 28);
2360 rh->ip.payload_length = clib_host_to_net_u16 (payload_length);
2361 rh->ip.protocol = IP_PROTOCOL_ICMP6;
2362 rh->ip.hop_limit = 255;
2363 rh->ip.src_address = radv_info->link_local_address;
2364 /* set address ff02::2 */
2365 rh->ip.dst_address.as_u64[0] = clib_host_to_net_u64 (0xff02ULL << 48);
2366 rh->ip.dst_address.as_u64[1] = clib_host_to_net_u64 (2);
2368 rh->neighbor.icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, p0,
2376 stop_sending_rs (vlib_main_t * vm, ip6_radv_t * ra)
2380 ra->keep_sending_rs = 0;
2383 bi0 = vlib_get_buffer_index (vm, ra->buffer);
2384 vlib_buffer_free (vm, &bi0, 1);
2390 check_send_rs (vlib_main_t * vm, ip6_radv_t * radv_info, f64 current_time,
2400 icmp6_send_router_solicitation_params_t *params;
2402 if (!radv_info->keep_sending_rs)
2405 params = &radv_info->params;
2407 if (radv_info->due_time > current_time)
2409 *due_time = radv_info->due_time;
2413 p0 = radv_info->buffer;
2415 next_index = ip6_rewrite_mcast_node.index;
2417 c0 = vlib_buffer_copy (vm, p0);
2418 ci0 = vlib_get_buffer_index (vm, c0);
2420 f = vlib_get_frame_to_node (vm, next_index);
2421 to_next = vlib_frame_vector_args (f);
2424 vlib_put_frame_to_node (vm, next_index, f);
2426 if (params->mrc != 0 && --radv_info->n_left == 0)
2427 stop_sending_rs (vm, radv_info);
2430 radv_info->sleep_interval =
2431 (2 + random_f64_from_to (-0.1, 0.1)) * radv_info->sleep_interval;
2432 if (radv_info->sleep_interval > params->mrt)
2433 radv_info->sleep_interval =
2434 (1 + random_f64_from_to (-0.1, 0.1)) * params->mrt;
2436 radv_info->due_time = current_time + radv_info->sleep_interval;
2438 if (params->mrd != 0
2439 && current_time > radv_info->start_time + params->mrd)
2440 stop_sending_rs (vm, radv_info);
2442 *due_time = radv_info->due_time;
2445 return radv_info->keep_sending_rs;
2449 send_rs_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
2452 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2453 ip6_radv_t *radv_info;
2454 uword *event_data = 0;
2455 f64 sleep_time = 1e9;
2462 vlib_process_wait_for_event_or_clock (vm, sleep_time);
2463 vlib_process_get_events (vm, &event_data);
2464 vec_reset_length (event_data);
2466 current_time = vlib_time_now (vm);
2469 due_time = current_time + 1e9;
2471 pool_foreach (radv_info, nm->if_radv_pool,
2473 if (check_send_rs (vm, radv_info, current_time, &dt)
2478 current_time = vlib_time_now (vm);
2480 while (due_time < current_time);
2482 sleep_time = due_time - current_time;
2489 VLIB_REGISTER_NODE (send_rs_process_node) = {
2490 .function = send_rs_process,
2491 .type = VLIB_NODE_TYPE_PROCESS,
2492 .name = "send-rs-process",
2497 icmp6_send_router_solicitation (vlib_main_t * vm, u32 sw_if_index, u8 stop,
2498 icmp6_send_router_solicitation_params_t *
2501 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2505 ASSERT (~0 != sw_if_index);
2507 rai = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2508 ra = pool_elt_at_index (nm->if_radv_pool, rai);
2510 stop_sending_rs (vm, ra);
2514 ra->keep_sending_rs = 1;
2515 ra->params = *params;
2516 ra->n_left = params->mrc;
2517 ra->start_time = vlib_time_now (vm);
2518 ra->sleep_interval = (1 + random_f64_from_to (-0.1, 0.1)) * params->irt;
2519 ra->due_time = 0; /* send first packet ASAP */
2520 ra->buffer = create_buffer_for_rs (vm, ra);
2522 ra->keep_sending_rs = 0;
2524 vlib_process_signal_event (vm, send_rs_process_node.index, 1, 0);
2529 * @brief Add a multicast Address to the advertised MLD set
2532 ip6_neighbor_add_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2534 ip6_mldp_group_t *mcast_group_info;
2537 /* lookup mldp info for this interface */
2538 p = mhash_get (&radv_info->address_to_mldp_index, addr);
2540 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2543 if (!mcast_group_info)
2547 pool_get (radv_info->mldp_group_pool, mcast_group_info);
2549 mi = mcast_group_info - radv_info->mldp_group_pool;
2550 mhash_set (&radv_info->address_to_mldp_index, addr, mi, /* old_value */
2553 mcast_group_info->type = 4;
2554 mcast_group_info->mcast_source_address_pool = 0;
2555 mcast_group_info->num_sources = 0;
2556 clib_memcpy (&mcast_group_info->mcast_address, addr,
2557 sizeof (ip6_address_t));
2562 * @brief Delete a multicast Address from the advertised MLD set
2565 ip6_neighbor_del_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2567 ip6_mldp_group_t *mcast_group_info;
2570 p = mhash_get (&radv_info->address_to_mldp_index, &addr);
2572 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2574 if (mcast_group_info)
2576 mhash_unset (&radv_info->address_to_mldp_index, &addr,
2578 pool_put (radv_info->mldp_group_pool, mcast_group_info);
2583 * @brief Add a multicast Address to the advertised MLD set
2586 ip6_neighbor_add_mld_grp (ip6_radv_t * a,
2587 ip6_multicast_address_scope_t scope,
2588 ip6_multicast_link_local_group_id_t group)
2592 ip6_set_reserved_multicast_address (&addr, scope, group);
2594 ip6_neighbor_add_mld_prefix (a, &addr);
2598 * @brief create and initialize router advertisement parameters with default
2599 * values for this intfc
2602 ip6_neighbor_sw_interface_add_del (vnet_main_t * vnm,
2603 u32 sw_if_index, u32 is_add)
2605 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2608 vnet_sw_interface_t *sw_if0;
2609 ethernet_interface_t *eth_if0 = 0;
2611 /* lookup radv container - ethernet interfaces only */
2612 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2613 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2614 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2619 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2621 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2625 a = pool_elt_at_index (nm->if_radv_pool, ri);
2629 ip6_radv_prefix_t *p;
2630 ip6_mldp_group_t *m;
2632 /* release the lock on the interface's mcast adj */
2633 adj_unlock (a->mcast_adj_index);
2635 /* clean up prefix and MDP pools */
2637 pool_flush(p, a->adv_prefixes_pool,
2639 mhash_unset (&a->address_to_prefix_index, &p->prefix, 0);
2641 pool_flush (m, a->mldp_group_pool,
2643 mhash_unset (&a->address_to_mldp_index, &m->mcast_address, 0);
2647 pool_free (a->mldp_group_pool);
2648 pool_free (a->adv_prefixes_pool);
2650 mhash_free (&a->address_to_prefix_index);
2651 mhash_free (&a->address_to_mldp_index);
2653 if (a->keep_sending_rs)
2654 a->keep_sending_rs = 0;
2656 pool_put (nm->if_radv_pool, a);
2657 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ~0;
2665 pool_get (nm->if_radv_pool, a);
2667 ri = a - nm->if_radv_pool;
2668 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ri;
2670 /* initialize default values (most of which are zero) */
2671 clib_memset (a, 0, sizeof (a[0]));
2673 a->sw_if_index = sw_if_index;
2674 a->max_radv_interval = DEF_MAX_RADV_INTERVAL;
2675 a->min_radv_interval = DEF_MIN_RADV_INTERVAL;
2676 a->curr_hop_limit = DEF_CURR_HOP_LIMIT;
2677 a->adv_router_lifetime_in_sec = DEF_DEF_RTR_LIFETIME;
2679 /* send ll address source address option */
2680 a->adv_link_layer_address = 1;
2682 a->min_delay_between_radv = MIN_DELAY_BETWEEN_RAS;
2683 a->max_delay_between_radv = MAX_DELAY_BETWEEN_RAS;
2684 a->max_rtr_default_lifetime = MAX_DEF_RTR_LIFETIME;
2685 a->seed = (u32) clib_cpu_time_now ();
2686 (void) random_u32 (&a->seed);
2687 a->randomizer = clib_cpu_time_now ();
2688 (void) random_u64 (&a->randomizer);
2690 a->initial_adverts_count = MAX_INITIAL_RTR_ADVERTISEMENTS;
2691 a->initial_adverts_sent = a->initial_adverts_count - 1;
2692 a->initial_adverts_interval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
2694 /* deafult is to send */
2697 /* fill in radv_info for this interface that will be needed later */
2699 vnet_sw_interface_get_mtu (vnm, sw_if_index, VNET_MTU_IP6);
2701 clib_memcpy (a->link_layer_address, eth_if0->address, 6);
2703 /* fill in default link-local address (this may be overridden) */
2704 ip6_link_local_address_from_ethernet_address
2705 (&a->link_local_address, eth_if0->address);
2707 mhash_init (&a->address_to_prefix_index, sizeof (uword),
2708 sizeof (ip6_address_t));
2709 mhash_init (&a->address_to_mldp_index, sizeof (uword),
2710 sizeof (ip6_address_t));
2712 a->mcast_adj_index = adj_mcast_add_or_lock (FIB_PROTOCOL_IP6,
2716 a->keep_sending_rs = 0;
2718 /* add multicast groups we will always be reporting */
2719 ip6_neighbor_add_mld_grp (a,
2720 IP6_MULTICAST_SCOPE_link_local,
2721 IP6_MULTICAST_GROUP_ID_all_hosts);
2722 ip6_neighbor_add_mld_grp (a,
2723 IP6_MULTICAST_SCOPE_link_local,
2724 IP6_MULTICAST_GROUP_ID_all_routers);
2725 ip6_neighbor_add_mld_grp (a,
2726 IP6_MULTICAST_SCOPE_link_local,
2727 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2733 /* send an mldpv2 report */
2735 ip6_neighbor_send_mldpv2_report (u32 sw_if_index)
2737 vnet_main_t *vnm = vnet_get_main ();
2738 vlib_main_t *vm = vnm->vlib_main;
2739 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2740 vnet_sw_interface_t *sw_if0;
2741 ethernet_interface_t *eth_if0;
2745 ip6_radv_t *radv_info;
2755 icmp6_multicast_listener_report_header_t *rh0;
2756 icmp6_multicast_listener_report_packet_t *rp0;
2758 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2759 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
2760 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2762 if (!eth_if0 || !vnet_sw_interface_is_admin_up (vnm, sw_if_index))
2765 /* look up the radv_t information for this interface */
2766 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2769 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2774 /* send report now - build a mldpv2 report packet */
2775 n_allocated = vlib_buffer_alloc (vm, &bo0, n_to_alloc);
2776 if (PREDICT_FALSE (n_allocated == 0))
2779 clib_warning ("buffer allocation failure");
2783 b0 = vlib_get_buffer (vm, bo0);
2785 /* adjust the sizeof the buffer to just include the ipv6 header */
2786 b0->current_length = sizeof (icmp6_multicast_listener_report_packet_t);
2788 payload_length = sizeof (icmp6_multicast_listener_report_header_t);
2790 b0->error = ICMP6_ERROR_NONE;
2792 rp0 = vlib_buffer_get_current (b0);
2793 ip0 = (ip6_header_t *) & rp0->ip;
2794 rh0 = (icmp6_multicast_listener_report_header_t *) & rp0->report_hdr;
2796 clib_memset (rp0, 0x0, sizeof (icmp6_multicast_listener_report_packet_t));
2798 ip0->ip_version_traffic_class_and_flow_label =
2799 clib_host_to_net_u32 (0x6 << 28);
2801 ip0->protocol = IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS;
2802 /* for DEBUG - vnet driver won't seem to emit router alerts */
2803 /* ip0->protocol = IP_PROTOCOL_ICMP6; */
2806 rh0->icmp.type = ICMP6_multicast_listener_report_v2;
2808 /* source address MUST be the link-local address */
2809 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2810 ip0->src_address = radv_info->link_local_address;
2812 /* destination is all mldpv2 routers */
2813 ip6_set_reserved_multicast_address (&ip0->dst_address,
2814 IP6_MULTICAST_SCOPE_link_local,
2815 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2817 /* add reports here */
2818 ip6_mldp_group_t *m;
2819 int num_addr_records = 0;
2820 icmp6_multicast_address_record_t rr;
2822 /* fill in the hop-by-hop extension header (router alert) info */
2823 rh0->ext_hdr.next_hdr = IP_PROTOCOL_ICMP6;
2824 rh0->ext_hdr.n_data_u64s = 0;
2826 rh0->alert.type = IP6_MLDP_ALERT_TYPE;
2828 rh0->alert.value = 0;
2833 rh0->icmp.checksum = 0;
2836 pool_foreach (m, radv_info->mldp_group_pool,
2839 rr.aux_data_len_u32s = 0;
2840 rr.num_sources = clib_host_to_net_u16 (m->num_sources);
2841 clib_memcpy(&rr.mcast_addr, &m->mcast_address, sizeof(ip6_address_t));
2845 if(vlib_buffer_add_data (vm, &bo0, (void *)&rr,
2846 sizeof(icmp6_multicast_address_record_t)))
2848 vlib_buffer_free (vm, &bo0, 1);
2852 payload_length += sizeof( icmp6_multicast_address_record_t);
2857 rh0->num_addr_records = clib_host_to_net_u16 (num_addr_records);
2859 /* update lengths */
2860 ip0->payload_length = clib_host_to_net_u16 (payload_length);
2862 rh0->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0,
2864 ASSERT (bogus_length == 0);
2867 * OK to override w/ no regard for actual FIB, because
2868 * ip6-rewrite only looks at the adjacency.
2870 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
2871 vnet_main.local_interface_sw_if_index;
2873 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
2874 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
2876 vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite-mcast");
2878 f = vlib_get_frame_to_node (vm, node->index);
2879 to_next = vlib_frame_vector_args (f);
2883 vlib_put_frame_to_node (vm, node->index, f);
2888 VLIB_REGISTER_NODE (ip6_icmp_router_solicitation_node,static) =
2890 .function = icmp6_router_solicitation,
2891 .name = "icmp6-router-solicitation",
2893 .vector_size = sizeof (u32),
2895 .format_trace = format_icmp6_input_trace,
2897 .n_next_nodes = ICMP6_ROUTER_SOLICITATION_N_NEXT,
2899 [ICMP6_ROUTER_SOLICITATION_NEXT_DROP] = "ip6-drop",
2900 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW] = "ip6-rewrite-mcast",
2901 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX] = "interface-output",
2906 /* send a RA or update the timer info etc.. */
2908 ip6_neighbor_process_timer_event (vlib_main_t * vm,
2909 vlib_node_runtime_t * node,
2910 vlib_frame_t * frame)
2912 vnet_main_t *vnm = vnet_get_main ();
2913 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2914 ip6_radv_t *radv_info;
2915 vlib_frame_t *f = 0;
2916 u32 n_this_frame = 0;
2917 u32 n_left_to_next = 0;
2920 icmp6_router_solicitation_header_t *h0;
2922 f64 now = vlib_time_now (vm);
2924 /* Interface ip6 radv info list */
2926 pool_foreach (radv_info, nm->if_radv_pool,
2928 if( !vnet_sw_interface_is_admin_up (vnm, radv_info->sw_if_index))
2930 radv_info->initial_adverts_sent = radv_info->initial_adverts_count-1;
2931 radv_info->next_multicast_time = now;
2932 radv_info->last_multicast_time = now;
2933 radv_info->last_radv_time = 0;
2934 radv_info->all_routers_mcast = 0;
2938 /* Make sure that we've joined the all-routers multicast group */
2939 if(!radv_info->all_routers_mcast)
2941 /* send MDLP_REPORT_EVENT message */
2942 ip6_neighbor_send_mldpv2_report(radv_info->sw_if_index);
2943 radv_info->all_routers_mcast = 1;
2946 /* is it time to send a multicast RA on this interface? */
2947 if(radv_info->send_radv && (now >= radv_info->next_multicast_time))
2952 f64 rfn = (radv_info->max_radv_interval - radv_info->min_radv_interval) *
2953 random_f64 (&radv_info->seed) + radv_info->min_radv_interval;
2955 /* multicast send - compute next multicast send time */
2956 if( radv_info->initial_adverts_sent > 0)
2958 radv_info->initial_adverts_sent--;
2959 if(rfn > radv_info-> initial_adverts_interval)
2960 rfn = radv_info-> initial_adverts_interval;
2962 /* check to see if we are ceasing to send */
2963 if( radv_info->initial_adverts_sent == 0)
2964 if(radv_info->cease_radv)
2965 radv_info->send_radv = 0;
2968 radv_info->next_multicast_time = rfn + now;
2969 radv_info->last_multicast_time = now;
2971 /* send advert now - build a "solicted" router advert with unspecified source address */
2972 n_allocated = vlib_buffer_alloc (vm, &bo0, n_to_alloc);
2974 if (PREDICT_FALSE(n_allocated == 0))
2976 clib_warning ("buffer allocation failure");
2979 b0 = vlib_get_buffer (vm, bo0);
2980 b0->current_length = sizeof( icmp6_router_solicitation_header_t);
2981 b0->error = ICMP6_ERROR_NONE;
2982 vnet_buffer (b0)->sw_if_index[VLIB_RX] = radv_info->sw_if_index;
2984 h0 = vlib_buffer_get_current (b0);
2986 clib_memset (h0, 0, sizeof (icmp6_router_solicitation_header_t));
2988 h0->ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2989 h0->ip.payload_length = clib_host_to_net_u16 (sizeof (icmp6_router_solicitation_header_t)
2990 - STRUCT_OFFSET_OF (icmp6_router_solicitation_header_t, neighbor));
2991 h0->ip.protocol = IP_PROTOCOL_ICMP6;
2992 h0->ip.hop_limit = 255;
2994 /* set src/dst address as "unspecified" this marks this packet as internally generated rather than recieved */
2995 h0->ip.src_address.as_u64[0] = 0;
2996 h0->ip.src_address.as_u64[1] = 0;
2998 h0->ip.dst_address.as_u64[0] = 0;
2999 h0->ip.dst_address.as_u64[1] = 0;
3001 h0->neighbor.icmp.type = ICMP6_router_solicitation;
3003 if (PREDICT_FALSE(f == 0))
3005 f = vlib_get_frame_to_node (vm, ip6_icmp_router_solicitation_node.index);
3006 to_next = vlib_frame_vector_args (f);
3007 n_left_to_next = VLIB_FRAME_SIZE;
3016 if (PREDICT_FALSE(n_left_to_next == 0))
3018 f->n_vectors = n_this_frame;
3019 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
3028 ASSERT (n_this_frame);
3029 f->n_vectors = n_this_frame;
3030 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
3036 ip6_icmp_neighbor_discovery_event_process (vlib_main_t * vm,
3037 vlib_node_runtime_t * node,
3038 vlib_frame_t * frame)
3041 ip6_icmp_neighbor_discovery_event_data_t *event_data;
3043 /* init code here */
3047 vlib_process_wait_for_event_or_clock (vm, 1. /* seconds */ );
3049 event_data = vlib_process_get_event_data (vm, &event_type);
3053 /* No events found: timer expired. */
3054 /* process interface list and send RAs as appropriate, update timer info */
3055 ip6_neighbor_process_timer_event (vm, node, frame);
3062 case ICMP6_ND_EVENT_INIT:
3073 _vec_len (event_data) = 0;
3076 return frame->n_vectors;
3080 VLIB_REGISTER_NODE (ip6_icmp_router_advertisement_node,static) =
3082 .function = icmp6_router_advertisement,
3083 .name = "icmp6-router-advertisement",
3085 .vector_size = sizeof (u32),
3087 .format_trace = format_icmp6_input_trace,
3096 vlib_node_registration_t ip6_icmp_neighbor_discovery_event_node = {
3098 .function = ip6_icmp_neighbor_discovery_event_process,
3099 .name = "ip6-icmp-neighbor-discovery-event-process",
3100 .type = VLIB_NODE_TYPE_PROCESS,
3104 icmp6_neighbor_solicitation (vlib_main_t * vm,
3105 vlib_node_runtime_t * node, vlib_frame_t * frame)
3107 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
3108 /* is_solicitation */
3113 icmp6_neighbor_advertisement (vlib_main_t * vm,
3114 vlib_node_runtime_t * node,
3115 vlib_frame_t * frame)
3117 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
3118 /* is_solicitation */
3123 VLIB_REGISTER_NODE (ip6_icmp_neighbor_solicitation_node,static) =
3125 .function = icmp6_neighbor_solicitation,
3126 .name = "icmp6-neighbor-solicitation",
3128 .vector_size = sizeof (u32),
3130 .format_trace = format_icmp6_input_trace,
3132 .n_next_nodes = ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
3134 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP] = "ip6-drop",
3135 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY] = "interface-output",
3141 VLIB_REGISTER_NODE (ip6_icmp_neighbor_advertisement_node,static) =
3143 .function = icmp6_neighbor_advertisement,
3144 .name = "icmp6-neighbor-advertisement",
3146 .vector_size = sizeof (u32),
3148 .format_trace = format_icmp6_input_trace,
3159 IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
3160 IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX,
3161 IP6_DISCOVER_NEIGHBOR_N_NEXT,
3162 } ip6_discover_neighbor_next_t;
3166 IP6_DISCOVER_NEIGHBOR_ERROR_DROP,
3167 IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT,
3168 IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS,
3169 } ip6_discover_neighbor_error_t;
3172 ip6_discover_neighbor_inline (vlib_main_t * vm,
3173 vlib_node_runtime_t * node,
3174 vlib_frame_t * frame, int is_glean)
3176 vnet_main_t *vnm = vnet_get_main ();
3177 ip6_main_t *im = &ip6_main;
3178 ip_lookup_main_t *lm = &im->lookup_main;
3179 u32 *from, *to_next_drop;
3180 uword n_left_from, n_left_to_next_drop;
3182 u32 thread_index = vm->thread_index;
3184 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3186 if (node->flags & VLIB_NODE_FLAG_TRACE)
3187 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
3189 seed = throttle_seed (&im->nd_throttle, thread_index, vlib_time_now (vm));
3191 from = vlib_frame_vector_args (frame);
3192 n_left_from = frame->n_vectors;
3194 while (n_left_from > 0)
3196 vlib_get_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
3197 to_next_drop, n_left_to_next_drop);
3199 while (n_left_from > 0 && n_left_to_next_drop > 0)
3201 u32 pi0, adj_index0, sw_if_index0, drop0, r0, next0;
3202 vnet_hw_interface_t *hw_if0;
3203 ip6_radv_t *radv_info;
3204 ip_adjacency_t *adj0;
3210 p0 = vlib_get_buffer (vm, pi0);
3212 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
3214 ip0 = vlib_buffer_get_current (p0);
3216 adj0 = adj_get (adj_index0);
3220 ip0->dst_address.as_u64[0] =
3221 adj0->sub_type.nbr.next_hop.ip6.as_u64[0];
3222 ip0->dst_address.as_u64[1] =
3223 adj0->sub_type.nbr.next_hop.ip6.as_u64[1];
3226 sw_if_index0 = adj0->rewrite_header.sw_if_index;
3227 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
3229 /* combine the address and interface for a hash */
3230 r0 = ip6_address_hash_to_u64 (&ip0->dst_address) ^ sw_if_index0;
3232 drop0 = throttle_check (&im->nd_throttle, thread_index, r0, seed);
3236 to_next_drop[0] = pi0;
3238 n_left_to_next_drop -= 1;
3240 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
3242 /* If the interface is link-down, drop the pkt */
3243 if (!(hw_if0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
3246 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) > sw_if_index0)
3248 u32 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
3251 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3259 * the adj has been updated to a rewrite but the node the DPO that got
3260 * us here hasn't - yet. no big deal. we'll drop while we wait.
3262 if (IP_LOOKUP_NEXT_REWRITE == adj0->lookup_next_index)
3266 node->errors[drop0 ? IP6_DISCOVER_NEIGHBOR_ERROR_DROP
3267 : IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT];
3274 icmp6_neighbor_solicitation_header_t *h0;
3277 h0 = vlib_packet_template_get_packet
3278 (vm, &im->discover_neighbor_packet_template, &bi0);
3282 /* copy the persistent fields from the original */
3283 b0 = vlib_get_buffer (vm, bi0);
3284 clib_memcpy_fast (b0->opaque2, p0->opaque2, sizeof (p0->opaque2));
3287 * Build ethernet header.
3288 * Choose source address based on destination lookup
3291 if (!ip6_src_address_for_packet (lm,
3294 &h0->ip.src_address))
3296 /* There is no address on the interface */
3298 node->errors[IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS];
3299 vlib_buffer_free (vm, &bi0, 1);
3304 * Destination address is a solicited node multicast address.
3305 * We need to fill in
3306 * the low 24 bits with low 24 bits of target's address.
3308 h0->ip.dst_address.as_u8[13] = ip0->dst_address.as_u8[13];
3309 h0->ip.dst_address.as_u8[14] = ip0->dst_address.as_u8[14];
3310 h0->ip.dst_address.as_u8[15] = ip0->dst_address.as_u8[15];
3312 h0->neighbor.target_address = ip0->dst_address;
3314 clib_memcpy (h0->link_layer_option.ethernet_address,
3315 hw_if0->hw_address, vec_len (hw_if0->hw_address));
3317 /* $$$$ appears we need this; why is the checksum non-zero? */
3318 h0->neighbor.icmp.checksum = 0;
3319 h0->neighbor.icmp.checksum =
3320 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h0->ip,
3323 ASSERT (bogus_length == 0);
3325 vlib_buffer_copy_trace_flag (vm, p0, bi0);
3326 vnet_buffer (b0)->sw_if_index[VLIB_TX]
3327 = vnet_buffer (p0)->sw_if_index[VLIB_TX];
3329 vnet_buffer (b0)->ip.adj_index[VLIB_TX] =
3330 radv_info->mcast_adj_index;
3332 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
3333 next0 = IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX;
3335 vlib_set_next_frame_buffer (vm, node, next0, bi0);
3339 vlib_put_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
3340 n_left_to_next_drop);
3343 return frame->n_vectors;
3347 ip6_discover_neighbor (vlib_main_t * vm,
3348 vlib_node_runtime_t * node, vlib_frame_t * frame)
3350 return (ip6_discover_neighbor_inline (vm, node, frame, 0));
3354 ip6_glean (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3356 return (ip6_discover_neighbor_inline (vm, node, frame, 1));
3359 static char *ip6_discover_neighbor_error_strings[] = {
3360 [IP6_DISCOVER_NEIGHBOR_ERROR_DROP] = "address overflow drops",
3361 [IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT] = "neighbor solicitations sent",
3362 [IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS]
3363 = "no source address for ND solicitation",
3367 VLIB_REGISTER_NODE (ip6_glean_node) =
3369 .function = ip6_glean,
3370 .name = "ip6-glean",
3371 .vector_size = sizeof (u32),
3372 .format_trace = format_ip6_forward_next_trace,
3373 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
3374 .error_strings = ip6_discover_neighbor_error_strings,
3375 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
3378 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "ip6-drop",
3379 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "ip6-rewrite-mcast",
3382 VLIB_REGISTER_NODE (ip6_discover_neighbor_node) =
3384 .function = ip6_discover_neighbor,
3385 .name = "ip6-discover-neighbor",
3386 .vector_size = sizeof (u32),
3387 .format_trace = format_ip6_forward_next_trace,
3388 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
3389 .error_strings = ip6_discover_neighbor_error_strings,
3390 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
3393 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "ip6-drop",
3394 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "ip6-rewrite-mcast",
3399 /* API support functions */
3401 ip6_neighbor_ra_config (vlib_main_t * vm, u32 sw_if_index,
3402 u8 suppress, u8 managed, u8 other,
3403 u8 ll_option, u8 send_unicast, u8 cease,
3404 u8 use_lifetime, u32 lifetime,
3405 u32 initial_count, u32 initial_interval,
3406 u32 max_interval, u32 min_interval, u8 is_no)
3408 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3412 /* look up the radv_t information for this interface */
3413 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3415 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3416 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
3421 ip6_radv_t *radv_info;
3422 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3424 if ((max_interval != 0) && (min_interval == 0))
3425 min_interval = .75 * max_interval;
3429 0) ? ((is_no) ? DEF_MAX_RADV_INTERVAL : max_interval) :
3430 radv_info->max_radv_interval;
3433 0) ? ((is_no) ? DEF_MIN_RADV_INTERVAL : min_interval) :
3434 radv_info->min_radv_interval;
3437 0) ? ((is_no) ? DEF_DEF_RTR_LIFETIME : lifetime) :
3438 radv_info->adv_router_lifetime_in_sec;
3442 if (lifetime > MAX_DEF_RTR_LIFETIME)
3443 lifetime = MAX_DEF_RTR_LIFETIME;
3445 if (lifetime <= max_interval)
3446 return VNET_API_ERROR_INVALID_VALUE;
3449 if (min_interval != 0)
3451 if ((min_interval > .75 * max_interval) || (min_interval < 3))
3452 return VNET_API_ERROR_INVALID_VALUE;
3455 if ((initial_count > MAX_INITIAL_RTR_ADVERTISEMENTS) ||
3456 (initial_interval > MAX_INITIAL_RTR_ADVERT_INTERVAL))
3457 return VNET_API_ERROR_INVALID_VALUE;
3460 if "flag" is set and is_no is true then restore default value else set value corresponding to "flag"
3461 if "flag" is clear don't change corresponding value
3463 radv_info->send_radv =
3464 (suppress != 0) ? ((is_no != 0) ? 1 : 0) : radv_info->send_radv;
3465 radv_info->adv_managed_flag =
3466 (managed != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_managed_flag;
3467 radv_info->adv_other_flag =
3468 (other != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_other_flag;
3469 radv_info->adv_link_layer_address =
3471 0) ? ((is_no) ? 1 : 0) : radv_info->adv_link_layer_address;
3472 radv_info->send_unicast =
3473 (send_unicast != 0) ? ((is_no) ? 0 : 1) : radv_info->send_unicast;
3474 radv_info->cease_radv =
3475 (cease != 0) ? ((is_no) ? 0 : 1) : radv_info->cease_radv;
3477 radv_info->min_radv_interval = min_interval;
3478 radv_info->max_radv_interval = max_interval;
3479 radv_info->adv_router_lifetime_in_sec = lifetime;
3481 radv_info->initial_adverts_count =
3483 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERTISEMENTS : initial_count) :
3484 radv_info->initial_adverts_count;
3485 radv_info->initial_adverts_interval =
3486 (initial_interval !=
3487 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERT_INTERVAL : initial_interval) :
3488 radv_info->initial_adverts_interval;
3491 if ((cease != 0) && (is_no))
3492 radv_info->send_radv = 1;
3494 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
3495 radv_info->next_multicast_time = vlib_time_now (vm);
3496 radv_info->last_multicast_time = vlib_time_now (vm);
3497 radv_info->last_radv_time = 0;
3503 ip6_neighbor_ra_prefix (vlib_main_t * vm, u32 sw_if_index,
3504 ip6_address_t * prefix_addr, u8 prefix_len,
3505 u8 use_default, u32 val_lifetime, u32 pref_lifetime,
3506 u8 no_advertise, u8 off_link, u8 no_autoconfig,
3507 u8 no_onlink, u8 is_no)
3509 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3514 /* look up the radv_t information for this interface */
3515 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3518 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3520 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
3524 f64 now = vlib_time_now (vm);
3525 ip6_radv_t *radv_info;
3526 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3528 /* prefix info add, delete or update */
3529 ip6_radv_prefix_t *prefix;
3531 /* lookup prefix info for this address on this interface */
3532 uword *p = mhash_get (&radv_info->address_to_prefix_index, prefix_addr);
3534 prefix = p ? pool_elt_at_index (radv_info->adv_prefixes_pool, p[0]) : 0;
3540 return VNET_API_ERROR_INVALID_VALUE; /* invalid prefix */
3542 if (prefix->prefix_len != prefix_len)
3543 return VNET_API_ERROR_INVALID_VALUE_2;
3545 /* FIXME - Should the DP do this or the CP ? */
3546 /* do specific delete processing here before returning */
3547 /* try to remove from routing table */
3549 mhash_unset (&radv_info->address_to_prefix_index, prefix_addr,
3551 pool_put (radv_info->adv_prefixes_pool, prefix);
3553 radv_info->initial_adverts_sent =
3554 radv_info->initial_adverts_count - 1;
3555 radv_info->next_multicast_time = vlib_time_now (vm);
3556 radv_info->last_multicast_time = vlib_time_now (vm);
3557 radv_info->last_radv_time = 0;
3561 /* adding or changing */
3566 pool_get (radv_info->adv_prefixes_pool, prefix);
3567 pi = prefix - radv_info->adv_prefixes_pool;
3568 mhash_set (&radv_info->address_to_prefix_index, prefix_addr, pi,
3571 clib_memset (prefix, 0x0, sizeof (ip6_radv_prefix_t));
3573 prefix->prefix_len = prefix_len;
3574 clib_memcpy (&prefix->prefix, prefix_addr, sizeof (ip6_address_t));
3576 /* initialize default values */
3577 prefix->adv_on_link_flag = 1; /* L bit set */
3578 prefix->adv_autonomous_flag = 1; /* A bit set */
3579 prefix->adv_valid_lifetime_in_secs = DEF_ADV_VALID_LIFETIME;
3580 prefix->adv_pref_lifetime_in_secs = DEF_ADV_PREF_LIFETIME;
3581 prefix->enabled = 1;
3582 prefix->decrement_lifetime_flag = 1;
3583 prefix->deprecated_prefix_flag = 1;
3587 /* FIXME - Should the DP do this or the CP ? */
3588 /* insert prefix into routing table as a connected prefix */
3597 if (prefix->prefix_len != prefix_len)
3598 return VNET_API_ERROR_INVALID_VALUE_2;
3602 /* FIXME - Should the DP do this or the CP ? */
3603 /* remove from routing table if already there */
3607 if ((val_lifetime == ~0) || (pref_lifetime == ~0))
3609 prefix->adv_valid_lifetime_in_secs = ~0;
3610 prefix->adv_pref_lifetime_in_secs = ~0;
3611 prefix->decrement_lifetime_flag = 0;
3615 prefix->adv_valid_lifetime_in_secs = val_lifetime;;
3616 prefix->adv_pref_lifetime_in_secs = pref_lifetime;
3619 /* copy remaining */
3620 prefix->enabled = !(no_advertise != 0);
3621 prefix->adv_on_link_flag = !((off_link != 0) || (no_onlink != 0));
3622 prefix->adv_autonomous_flag = !(no_autoconfig != 0);
3626 /* fill in the expiration times */
3627 prefix->valid_lifetime_expires =
3628 now + prefix->adv_valid_lifetime_in_secs;
3629 prefix->pref_lifetime_expires = now + prefix->adv_pref_lifetime_in_secs;
3631 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
3632 radv_info->next_multicast_time = vlib_time_now (vm);
3633 radv_info->last_multicast_time = vlib_time_now (vm);
3634 radv_info->last_radv_time = 0;
3640 ip6_neighbor_cmd (vlib_main_t * vm, unformat_input_t * main_input,
3641 vlib_cli_command_t * cmd)
3643 vnet_main_t *vnm = vnet_get_main ();
3644 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3645 clib_error_t *error = 0;
3647 u8 suppress = 0, managed = 0, other = 0;
3648 u8 suppress_ll_option = 0, send_unicast = 0, cease = 0;
3649 u8 use_lifetime = 0;
3650 u32 sw_if_index, ra_lifetime = 0, ra_initial_count =
3651 0, ra_initial_interval = 0;
3652 u32 ra_max_interval = 0, ra_min_interval = 0;
3654 unformat_input_t _line_input, *line_input = &_line_input;
3655 vnet_sw_interface_t *sw_if0;
3657 int add_radv_info = 1;
3658 __attribute__ ((unused)) ip6_radv_t *radv_info = 0;
3659 ip6_address_t ip6_addr;
3663 /* Get a line of input. */
3664 if (!unformat_user (main_input, unformat_line_input, line_input))
3667 /* get basic radv info for this interface */
3668 if (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3671 if (unformat_user (line_input,
3672 unformat_vnet_sw_interface, vnm, &sw_if_index))
3675 ethernet_interface_t *eth_if0 = 0;
3677 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
3678 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
3680 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
3685 clib_error_return (0, "Interface must be of ethernet type");
3689 /* look up the radv_t information for this interface */
3690 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3693 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3697 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3701 error = clib_error_return (0, "unknown interface %U'",
3702 format_unformat_error, line_input);
3708 error = clib_error_return (0, "invalid interface name %U'",
3709 format_unformat_error, line_input);
3714 /* get the rest of the command */
3715 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3717 if (unformat (line_input, "no"))
3719 else if (unformat (line_input, "prefix %U/%d",
3720 unformat_ip6_address, &ip6_addr, &addr_len))
3725 else if (unformat (line_input, "ra-managed-config-flag"))
3730 else if (unformat (line_input, "ra-other-config-flag"))
3735 else if (unformat (line_input, "ra-suppress") ||
3736 unformat (line_input, "ra-surpress"))
3741 else if (unformat (line_input, "ra-suppress-link-layer") ||
3742 unformat (line_input, "ra-surpress-link-layer"))
3744 suppress_ll_option = 1;
3747 else if (unformat (line_input, "ra-send-unicast"))
3752 else if (unformat (line_input, "ra-lifetime"))
3754 if (!unformat (line_input, "%d", &ra_lifetime))
3756 error = unformat_parse_error (line_input);
3762 else if (unformat (line_input, "ra-initial"))
3765 (line_input, "%d %d", &ra_initial_count, &ra_initial_interval))
3767 error = unformat_parse_error (line_input);
3772 else if (unformat (line_input, "ra-interval"))
3774 if (!unformat (line_input, "%d", &ra_max_interval))
3776 error = unformat_parse_error (line_input);
3780 if (!unformat (line_input, "%d", &ra_min_interval))
3781 ra_min_interval = 0;
3784 else if (unformat (line_input, "ra-cease"))
3791 error = unformat_parse_error (line_input);
3798 ip6_neighbor_ra_config (vm, sw_if_index,
3799 suppress, managed, other,
3800 suppress_ll_option, send_unicast, cease,
3801 use_lifetime, ra_lifetime,
3802 ra_initial_count, ra_initial_interval,
3803 ra_max_interval, ra_min_interval, is_no);
3807 u32 valid_lifetime_in_secs = 0;
3808 u32 pref_lifetime_in_secs = 0;
3809 u8 use_prefix_default_values = 0;
3810 u8 no_advertise = 0;
3812 u8 no_autoconfig = 0;
3815 /* get the rest of the command */
3816 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3818 if (unformat (line_input, "default"))
3820 use_prefix_default_values = 1;
3823 else if (unformat (line_input, "infinite"))
3825 valid_lifetime_in_secs = ~0;
3826 pref_lifetime_in_secs = ~0;
3829 else if (unformat (line_input, "%d %d", &valid_lifetime_in_secs,
3830 &pref_lifetime_in_secs))
3837 /* get the rest of the command */
3838 while (!use_prefix_default_values &&
3839 unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3841 if (unformat (line_input, "no-advertise"))
3843 else if (unformat (line_input, "off-link"))
3845 else if (unformat (line_input, "no-autoconfig"))
3847 else if (unformat (line_input, "no-onlink"))
3851 error = unformat_parse_error (line_input);
3856 ip6_neighbor_ra_prefix (vm, sw_if_index,
3857 &ip6_addr, addr_len,
3858 use_prefix_default_values,
3859 valid_lifetime_in_secs,
3860 pref_lifetime_in_secs,
3862 off_link, no_autoconfig, no_onlink, is_no);
3866 unformat_free (line_input);
3872 ip6_print_addrs (vlib_main_t * vm, u32 * addrs)
3874 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3877 for (i = 0; i < vec_len (addrs); i++)
3879 ip_interface_address_t *a =
3880 pool_elt_at_index (lm->if_address_pool, addrs[i]);
3881 ip6_address_t *address = ip_interface_address_get_address (lm, a);
3883 vlib_cli_output (vm, "\t\t%U/%d",
3884 format_ip6_address, address, a->address_length);
3888 static clib_error_t *
3889 show_ip6_interface_cmd (vlib_main_t * vm,
3890 unformat_input_t * input, vlib_cli_command_t * cmd)
3892 vnet_main_t *vnm = vnet_get_main ();
3893 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3894 clib_error_t *error = 0;
3899 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3903 /* look up the radv_t information for this interface */
3904 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3907 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3911 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3912 ip6_radv_t *radv_info;
3913 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3915 vlib_cli_output (vm, "%U is admin %s\n",
3916 format_vnet_sw_interface_name, vnm,
3917 vnet_get_sw_interface (vnm, sw_if_index),
3918 (vnet_sw_interface_is_admin_up (vnm, sw_if_index) ?
3922 u32 *link_scope = 0, *global_scope = 0;
3923 u32 *local_scope = 0, *unknown_scope = 0;
3924 ip_interface_address_t *a;
3926 vec_validate_init_empty (lm->if_address_pool_index_by_sw_if_index,
3928 ai = lm->if_address_pool_index_by_sw_if_index[sw_if_index];
3930 while (ai != (u32) ~ 0)
3932 a = pool_elt_at_index (lm->if_address_pool, ai);
3933 ip6_address_t *address =
3934 ip_interface_address_get_address (lm, a);
3936 if (ip6_address_is_link_local_unicast (address))
3937 vec_add1 (link_scope, ai);
3938 else if (ip6_address_is_global_unicast (address))
3939 vec_add1 (global_scope, ai);
3940 else if (ip6_address_is_local_unicast (address))
3941 vec_add1 (local_scope, ai);
3943 vec_add1 (unknown_scope, ai);
3945 ai = a->next_this_sw_interface;
3948 if (vec_len (link_scope))
3950 vlib_cli_output (vm, "\tLink-local address(es):\n");
3951 ip6_print_addrs (vm, link_scope);
3952 vec_free (link_scope);
3955 if (vec_len (local_scope))
3957 vlib_cli_output (vm, "\tLocal unicast address(es):\n");
3958 ip6_print_addrs (vm, local_scope);
3959 vec_free (local_scope);
3962 if (vec_len (global_scope))
3964 vlib_cli_output (vm, "\tGlobal unicast address(es):\n");
3965 ip6_print_addrs (vm, global_scope);
3966 vec_free (global_scope);
3969 if (vec_len (unknown_scope))
3971 vlib_cli_output (vm, "\tOther-scope address(es):\n");
3972 ip6_print_addrs (vm, unknown_scope);
3973 vec_free (unknown_scope);
3976 vlib_cli_output (vm, "\tLink-local address(es):\n");
3977 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
3978 &radv_info->link_local_address);
3980 vlib_cli_output (vm, "\tJoined group address(es):\n");
3981 ip6_mldp_group_t *m;
3983 pool_foreach (m, radv_info->mldp_group_pool,
3985 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
3990 vlib_cli_output (vm, "\tAdvertised Prefixes:\n");
3991 ip6_radv_prefix_t *p;
3993 pool_foreach (p, radv_info->adv_prefixes_pool,
3995 vlib_cli_output (vm, "\t\tprefix %U, length %d\n",
3996 format_ip6_address, &p->prefix, p->prefix_len);
4000 vlib_cli_output (vm, "\tMTU is %d\n", radv_info->adv_link_mtu);
4001 vlib_cli_output (vm, "\tICMP error messages are unlimited\n");
4002 vlib_cli_output (vm, "\tICMP redirects are disabled\n");
4003 vlib_cli_output (vm, "\tICMP unreachables are not sent\n");
4004 vlib_cli_output (vm, "\tND DAD is disabled\n");
4005 //vlib_cli_output (vm, "\tND reachable time is %d milliseconds\n",);
4006 vlib_cli_output (vm, "\tND advertised reachable time is %d\n",
4007 radv_info->adv_neighbor_reachable_time_in_msec);
4008 vlib_cli_output (vm,
4009 "\tND advertised retransmit interval is %d (msec)\n",
4011 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
4013 u32 ra_interval = radv_info->max_radv_interval;
4014 u32 ra_interval_min = radv_info->min_radv_interval;
4015 vlib_cli_output (vm,
4016 "\tND router advertisements are sent every %d seconds (min interval is %d)\n",
4017 ra_interval, ra_interval_min);
4018 vlib_cli_output (vm,
4019 "\tND router advertisements live for %d seconds\n",
4020 radv_info->adv_router_lifetime_in_sec);
4021 vlib_cli_output (vm,
4022 "\tHosts %s stateless autoconfig for addresses\n",
4023 (radv_info->adv_managed_flag) ? "use" :
4025 vlib_cli_output (vm, "\tND router advertisements sent %d\n",
4026 radv_info->n_advertisements_sent);
4027 vlib_cli_output (vm, "\tND router solicitations received %d\n",
4028 radv_info->n_solicitations_rcvd);
4029 vlib_cli_output (vm, "\tND router solicitations dropped %d\n",
4030 radv_info->n_solicitations_dropped);
4034 error = clib_error_return (0, "IPv6 not enabled on interface",
4035 format_unformat_error, input);
4043 * This command is used to display various IPv6 attributes on a given
4047 * Example of how to display IPv6 settings:
4048 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
4049 * GigabitEthernet2/0/0 is admin up
4050 * Link-local address(es):
4052 * Joined group address(es):
4057 * Advertised Prefixes:
4058 * prefix fe80::fe:28ff:fe9c:75b3, length 64
4060 * ICMP error messages are unlimited
4061 * ICMP redirects are disabled
4062 * ICMP unreachables are not sent
4063 * ND DAD is disabled
4064 * ND advertised reachable time is 0
4065 * ND advertised retransmit interval is 0 (msec)
4066 * ND router advertisements are sent every 200 seconds (min interval is 150)
4067 * ND router advertisements live for 600 seconds
4068 * Hosts use stateless autoconfig for addresses
4069 * ND router advertisements sent 19336
4070 * ND router solicitations received 0
4071 * ND router solicitations dropped 0
4073 * Example of output if IPv6 is not enabled on the interface:
4074 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
4075 * show ip6 interface: IPv6 not enabled on interface
4079 VLIB_CLI_COMMAND (show_ip6_interface_command, static) =
4081 .path = "show ip6 interface",
4082 .function = show_ip6_interface_cmd,
4083 .short_help = "show ip6 interface <interface>",
4088 disable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
4090 clib_error_t *error = 0;
4091 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4094 /* look up the radv_t information for this interface */
4095 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
4097 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4099 /* if not created - do nothing */
4102 ip6_radv_t *radv_info;
4104 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4106 /* check radv_info ref count for other ip6 addresses on this interface */
4107 /* This implicitly excludes the link local address */
4108 if (radv_info->ref_count == 0)
4110 /* essentially "disables" ipv6 on this interface */
4111 ip6_ll_prefix_t ilp = {
4112 .ilp_addr = radv_info->link_local_address,
4113 .ilp_sw_if_index = sw_if_index,
4115 ip6_ll_table_entry_delete (&ilp);
4116 ip6_sw_interface_enable_disable (sw_if_index, 0);
4117 ip6_mfib_interface_enable_disable (sw_if_index, 0);
4118 ip6_neighbor_sw_interface_add_del (vnet_get_main (), sw_if_index,
4126 ip6_interface_enabled (vlib_main_t * vm, u32 sw_if_index)
4128 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4131 /* look up the radv_t information for this interface */
4132 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
4135 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4141 enable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
4143 clib_error_t *error = 0;
4144 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4148 /* look up the radv_t information for this interface */
4149 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
4152 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4154 /* if not created yet */
4157 vnet_main_t *vnm = vnet_get_main ();
4158 vnet_sw_interface_t *sw_if0;
4160 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
4161 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
4163 ethernet_interface_t *eth_if0;
4166 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
4169 /* create radv_info. for this interface. This holds all the info needed for router adverts */
4171 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, is_add);
4175 ip6_radv_t *radv_info;
4176 ip6_address_t link_local_address;
4178 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4180 ip6_link_local_address_from_ethernet_mac_address
4181 (&link_local_address, eth_if0->address);
4183 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index);
4184 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_SUB ||
4185 sw_if0->type == VNET_SW_INTERFACE_TYPE_PIPE ||
4186 sw_if0->type == VNET_SW_INTERFACE_TYPE_P2P)
4188 /* make up an interface id */
4189 link_local_address.as_u64[1] =
4190 random_u64 (&radv_info->randomizer);
4192 link_local_address.as_u64[0] =
4193 clib_host_to_net_u64 (0xFE80000000000000ULL);
4195 link_local_address.as_u8[8] &= 0xfd;
4198 ip6_ll_prefix_t ilp = {
4199 .ilp_addr = link_local_address,
4200 .ilp_sw_if_index = sw_if_index,
4203 ip6_ll_table_entry_update (&ilp, FIB_ROUTE_PATH_LOCAL);
4206 /* essentially "enables" ipv6 on this interface */
4207 ip6_mfib_interface_enable_disable (sw_if_index, 1);
4208 ip6_sw_interface_enable_disable (sw_if_index, 1);
4212 radv_info->link_local_address = link_local_address;
4222 ip6_get_ll_address (u32 sw_if_index, ip6_address_t * addr)
4224 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4225 ip6_radv_t *radv_info;
4228 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) <= sw_if_index)
4231 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4236 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4237 *addr = radv_info->link_local_address;
4242 static clib_error_t *
4243 enable_ip6_interface_cmd (vlib_main_t * vm,
4244 unformat_input_t * input, vlib_cli_command_t * cmd)
4246 vnet_main_t *vnm = vnet_get_main ();
4247 clib_error_t *error = 0;
4252 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4254 enable_ip6_interface (vm, sw_if_index);
4258 error = clib_error_return (0, "unknown interface\n'",
4259 format_unformat_error, input);
4266 * This command is used to enable IPv6 on a given interface.
4269 * Example of how enable IPv6 on a given interface:
4270 * @cliexcmd{enable ip6 interface GigabitEthernet2/0/0}
4273 VLIB_CLI_COMMAND (enable_ip6_interface_command, static) =
4275 .path = "enable ip6 interface",
4276 .function = enable_ip6_interface_cmd,
4277 .short_help = "enable ip6 interface <interface>",
4281 static clib_error_t *
4282 disable_ip6_interface_cmd (vlib_main_t * vm,
4283 unformat_input_t * input, vlib_cli_command_t * cmd)
4285 vnet_main_t *vnm = vnet_get_main ();
4286 clib_error_t *error = 0;
4291 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4293 error = disable_ip6_interface (vm, sw_if_index);
4297 error = clib_error_return (0, "unknown interface\n'",
4298 format_unformat_error, input);
4305 * This command is used to disable IPv6 on a given interface.
4308 * Example of how disable IPv6 on a given interface:
4309 * @cliexcmd{disable ip6 interface GigabitEthernet2/0/0}
4312 VLIB_CLI_COMMAND (disable_ip6_interface_command, static) =
4314 .path = "disable ip6 interface",
4315 .function = disable_ip6_interface_cmd,
4316 .short_help = "disable ip6 interface <interface>",
4321 * This command is used to configure the neighbor discovery
4322 * parameters on a given interface. Use the '<em>show ip6 interface</em>'
4323 * command to display some of the current neighbor discovery parameters
4324 * on a given interface. This command has three formats:
4327 * <b>Format 1 - Router Advertisement Options:</b> (Only one can be entered in a single command)
4329 * '<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>'
4333 * <em>[no] ra-managed-config-flag</em> - Advertises in ICMPv6
4334 * router-advertisement messages to use stateful address
4335 * auto-configuration to obtain address information (sets the M-bit).
4336 * Default is the M-bit is not set and the '<em>no</em>' option
4337 * returns it to this default state.
4339 * <em>[no] ra-other-config-flag</em> - Indicates in ICMPv6
4340 * router-advertisement messages that hosts use stateful auto
4341 * configuration to obtain nonaddress related information (sets
4342 * the O-bit). Default is the O-bit is not set and the '<em>no</em>'
4343 * option returns it to this default state.
4345 * <em>[no] ra-suppress</em> - Disables sending ICMPv6 router-advertisement
4346 * messages. The '<em>no</em>' option implies to enable sending ICMPv6
4347 * router-advertisement messages.
4349 * <em>[no] ra-suppress-link-layer</em> - Indicates not to include the
4350 * optional source link-layer address in the ICMPv6 router-advertisement
4351 * messages. Default is to include the optional source link-layer address
4352 * and the '<em>no</em>' option returns it to this default state.
4354 * <em>[no] ra-send-unicast</em> - Use the source address of the
4355 * router-solicitation message if availiable. The default is to use
4356 * multicast address of all nodes, and the '<em>no</em>' option returns
4357 * it to this default state.
4359 * <em>[no] ra-lifetime <lifetime></em> - Advertises the lifetime of a
4360 * default router in ICMPv6 router-advertisement messages. The range is
4361 * from 0 to 9000 seconds. '<em><lifetime></em>' must be greater than
4362 * '<em><max-interval></em>'. The default value is 600 seconds and the
4363 * '<em>no</em>' option returns it to this default value.
4365 * <em>[no] ra-initial <cnt> <interval></em> - Number of initial ICMPv6
4366 * router-advertisement messages sent and the interval between each
4367 * message. Range for count is 1 - 3 and default is 3. Range for interval
4368 * is 1 to 16 seconds, and default is 16 seconds. The '<em>no</em>' option
4369 * returns both to their default value.
4371 * <em>[no] ra-interval <max-interval> [<min-interval>]</em> - Configures the
4372 * interval between sending ICMPv6 router-advertisement messages. The
4373 * range for max-interval is from 4 to 200 seconds. min-interval can not
4374 * be more than 75% of max-interval. If not set, min-interval will be
4375 * set to 75% of max-interval. The range for min-interval is from 3 to
4376 * 150 seconds. The '<em>no</em>' option returns both to their default
4379 * <em>[no] ra-cease</em> - Cease sending ICMPv6 router-advertisement messages.
4380 * The '<em>no</em>' options implies to start (or restart) sending
4381 * ICMPv6 router-advertisement messages.
4384 * <b>Format 2 - Prefix Options:</b>
4386 * '<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>'
4390 * <em>no</em> - All additional flags are ignored and the prefix is deleted.
4392 * <em><valid-lifetime> <pref-lifetime></em> - '<em><valid-lifetime></em>' is the
4393 * length of time in seconds during what the prefix is valid for the purpose of
4394 * on-link determination. Range is 7203 to 2592000 seconds and default is 2592000
4395 * seconds (30 days). '<em><pref-lifetime></em>' is the prefered-lifetime and is the
4396 * length of time in seconds during what addresses generated from the prefix remain
4397 * preferred. Range is 0 to 604800 seconds and default is 604800 seconds (7 days).
4399 * <em>infinite</em> - Both '<em><valid-lifetime></em>' and '<em><<pref-lifetime></em>'
4400 * are inifinte, no timeout.
4402 * <em>no-advertise</em> - Do not send full router address in prefix
4403 * advertisement. Default is to advertise (i.e. - This flag is off by default).
4405 * <em>off-link</em> - Prefix is off-link, clear L-bit in packet. Default is on-link
4406 * (i.e. - This flag is off and L-bit in packet is set by default and this prefix can
4407 * be used for on-link determination). '<em>no-onlink</em>' also controls the L-bit.
4409 * <em>no-autoconfig</em> - Do not use prefix for autoconfiguration, clear A-bit in packet.
4410 * Default is autoconfig (i.e. - This flag is off and A-bit in packet is set by default.
4412 * <em>no-onlink</em> - Do not use prefix for onlink determination, clear L-bit in packet.
4413 * Default is on-link (i.e. - This flag is off and L-bit in packet is set by default and
4414 * this prefix can be used for on-link determination). '<em>off-link</em>' also controls
4418 * <b>Format 3: - Default of Prefix:</b>
4420 * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> default</b></em>'
4422 * When a new prefix is added (or existing one is being overwritten) <em>default</em>
4423 * uses default values for the prefix. If <em>no</em> is used, the <em>default</em>
4424 * is ignored and the prefix is deleted.
4428 * Example of how set a router advertisement option:
4429 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 ra-interval 100 20}
4430 * Example of how to add a prefix:
4431 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 prefix fe80::fe:28ff:fe9c:75b3/64 infinite no-advertise}
4432 * Example of how to delete a prefix:
4433 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 no prefix fe80::fe:28ff:fe9c:75b3/64}
4436 VLIB_CLI_COMMAND (ip6_nd_command, static) =
4439 .short_help = "ip6 nd <interface> ...",
4440 .function = ip6_neighbor_cmd,
4445 ip6_neighbor_set_link_local_address (vlib_main_t * vm, u32 sw_if_index,
4446 ip6_address_t * address)
4448 clib_error_t *error = 0;
4449 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4451 ip6_radv_t *radv_info;
4452 vnet_main_t *vnm = vnet_get_main ();
4453 ip6_ll_prefix_t pfx = { 0, };
4455 if (!ip6_address_is_link_local_unicast (address))
4456 return (error = clib_error_return (0, "address not link-local",
4457 format_unformat_error));
4459 /* call enable ipv6 */
4460 enable_ip6_interface (vm, sw_if_index);
4462 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4466 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4468 pfx.ilp_sw_if_index = sw_if_index;
4470 pfx.ilp_addr = radv_info->link_local_address;
4471 ip6_ll_table_entry_delete (&pfx);
4473 pfx.ilp_addr = *address;
4474 ip6_ll_table_entry_update (&pfx, FIB_ROUTE_PATH_LOCAL);
4476 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4477 radv_info->link_local_address = *address;
4481 vnm->api_errno = VNET_API_ERROR_IP6_NOT_ENABLED;
4482 error = clib_error_return (0, "ip6 not enabled for interface",
4483 format_unformat_error);
4489 * @brief callback when an interface address is added or deleted
4492 ip6_neighbor_add_del_interface_address (ip6_main_t * im,
4495 ip6_address_t * address,
4497 u32 if_address_index, u32 is_delete)
4499 vnet_main_t *vnm = vnet_get_main ();
4500 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4502 vlib_main_t *vm = vnm->vlib_main;
4503 ip6_radv_t *radv_info;
4506 /* create solicited node multicast address for this interface address */
4507 ip6_set_solicited_node_multicast_address (&a, 0);
4509 a.as_u8[0xd] = address->as_u8[0xd];
4510 a.as_u8[0xe] = address->as_u8[0xe];
4511 a.as_u8[0xf] = address->as_u8[0xf];
4515 /* try to create radv_info - does nothing if ipv6 already enabled */
4516 enable_ip6_interface (vm, sw_if_index);
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];
4525 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4528 if (!ip6_address_is_link_local_unicast (address))
4529 radv_info->ref_count++;
4531 ip6_neighbor_add_mld_prefix (radv_info, &a);
4538 /* look up the radv_t information for this interface */
4539 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
4541 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4546 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4548 ip6_neighbor_del_mld_prefix (radv_info, &a);
4550 /* if interface up send MLDP "report" */
4551 radv_info->all_routers_mcast = 0;
4554 if (!ip6_address_is_link_local_unicast (address))
4555 radv_info->ref_count--;
4557 /* Ensure that IPv6 is disabled, and LL removed after ref_count reaches 0 */
4558 disable_ip6_interface (vm, sw_if_index);
4563 ip6_set_neighbor_limit (u32 neighbor_limit)
4565 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4567 nm->limit_neighbor_cache_size = neighbor_limit;
4572 ip6_neighbor_table_bind (ip6_main_t * im,
4575 u32 new_fib_index, u32 old_fib_index)
4577 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4578 ip6_neighbor_t *n = NULL;
4579 u32 i, *to_re_add = 0;
4582 pool_foreach (n, nm->neighbor_pool,
4584 if (n->key.sw_if_index == sw_if_index)
4585 vec_add1 (to_re_add, n - nm->neighbor_pool);
4589 for (i = 0; i < vec_len (to_re_add); i++)
4591 n = pool_elt_at_index (nm->neighbor_pool, to_re_add[i]);
4592 ip6_neighbor_adj_fib_remove (n, old_fib_index);
4593 ip6_neighbor_adj_fib_add (n, new_fib_index);
4595 vec_free (to_re_add);
4598 static clib_error_t *
4599 ip6_neighbor_init (vlib_main_t * vm)
4601 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4602 ip6_main_t *im = &ip6_main;
4604 mhash_init (&nm->neighbor_index_by_key,
4605 /* value size */ sizeof (uword),
4606 /* key size */ sizeof (ip6_neighbor_key_t));
4608 icmp6_register_type (vm, ICMP6_neighbor_solicitation,
4609 ip6_icmp_neighbor_solicitation_node.index);
4610 icmp6_register_type (vm, ICMP6_neighbor_advertisement,
4611 ip6_icmp_neighbor_advertisement_node.index);
4612 icmp6_register_type (vm, ICMP6_router_solicitation,
4613 ip6_icmp_router_solicitation_node.index);
4614 icmp6_register_type (vm, ICMP6_router_advertisement,
4615 ip6_icmp_router_advertisement_node.index);
4617 /* handler node for ip6 neighbor discovery events and timers */
4618 vlib_register_node (vm, &ip6_icmp_neighbor_discovery_event_node);
4620 /* add call backs */
4621 ip6_add_del_interface_address_callback_t cb;
4622 clib_memset (&cb, 0x0, sizeof (ip6_add_del_interface_address_callback_t));
4624 /* when an interface address changes... */
4625 cb.function = ip6_neighbor_add_del_interface_address;
4626 cb.function_opaque = 0;
4627 vec_add1 (im->add_del_interface_address_callbacks, cb);
4629 ip6_table_bind_callback_t cbt;
4630 cbt.function = ip6_neighbor_table_bind;
4631 cbt.function_opaque = 0;
4632 vec_add1 (im->table_bind_callbacks, cbt);
4634 mhash_init (&nm->pending_resolutions_by_address,
4635 /* value size */ sizeof (uword),
4636 /* key size */ sizeof (ip6_address_t));
4638 mhash_init (&nm->mac_changes_by_address,
4639 /* value size */ sizeof (uword),
4640 /* key size */ sizeof (ip6_address_t));
4642 /* default, configurable */
4643 nm->limit_neighbor_cache_size = 50000;
4645 nm->wc_ip6_nd_publisher_node = (uword) ~ 0;
4647 nm->ip6_ra_publisher_node = (uword) ~ 0;
4650 /* $$$$ Hack fix for today */
4651 vec_validate_init_empty
4652 (im->discover_neighbor_next_index_by_hw_if_index, 32, 0 /* drop */ );
4658 VLIB_INIT_FUNCTION (ip6_neighbor_init);
4662 vnet_register_ip6_neighbor_resolution_event (vnet_main_t * vnm,
4665 uword type_opaque, uword data)
4667 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4668 ip6_address_t *address = address_arg;
4670 pending_resolution_t *pr;
4672 pool_get (nm->pending_resolutions, pr);
4674 pr->next_index = ~0;
4675 pr->node_index = node_index;
4676 pr->type_opaque = type_opaque;
4679 p = mhash_get (&nm->pending_resolutions_by_address, address);
4682 /* Insert new resolution at the head of the list */
4683 pr->next_index = p[0];
4684 mhash_unset (&nm->pending_resolutions_by_address, address, 0);
4687 mhash_set (&nm->pending_resolutions_by_address, address,
4688 pr - nm->pending_resolutions, 0 /* old value */ );
4692 vnet_add_del_ip6_nd_change_event (vnet_main_t * vnm,
4693 ip6_nd_change_event_cb_t data_callback,
4697 uword type_opaque, uword data, int is_add)
4699 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4700 ip6_address_t *address = address_arg;
4702 /* Try to find an existing entry */
4703 u32 *first = (u32 *) mhash_get (&nm->mac_changes_by_address, address);
4705 pending_resolution_t *mc;
4706 while (p && *p != ~0)
4708 mc = pool_elt_at_index (nm->mac_changes, *p);
4709 if (mc->node_index == node_index && mc->type_opaque == type_opaque
4712 p = &mc->next_index;
4715 int found = p && *p != ~0;
4719 return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
4721 pool_get (nm->mac_changes, mc);
4723 *mc = (pending_resolution_t)
4726 .node_index = node_index,
4727 .type_opaque = type_opaque,
4729 .data_callback = data_callback,
4734 /* Insert new resolution at the end of the list */
4735 u32 new_idx = mc - nm->mac_changes;
4739 mhash_set (&nm->mac_changes_by_address, address, new_idx, 0);
4744 return VNET_API_ERROR_NO_SUCH_ENTRY;
4746 /* Clients may need to clean up pool entries, too */
4748 (data_callback) (mc->data, NULL /* no new mac addrs */ , 0, NULL);
4750 /* Remove the entry from the list and delete the entry */
4751 *p = mc->next_index;
4752 pool_put (nm->mac_changes, mc);
4754 /* Remove from hash if we deleted the last entry */
4755 if (*p == ~0 && p == first)
4756 mhash_unset (&nm->mac_changes_by_address, address, 0);
4762 vnet_ip6_nd_term (vlib_main_t * vm,
4763 vlib_node_runtime_t * node,
4765 ethernet_header_t * eth,
4766 ip6_header_t * ip, u32 sw_if_index, u16 bd_index)
4768 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4769 icmp6_neighbor_solicitation_or_advertisement_header_t *ndh;
4772 mac_address_from_bytes (&mac, eth->src_address);
4773 ndh = ip6_next_header (ip);
4774 if (ndh->icmp.type != ICMP6_neighbor_solicitation &&
4775 ndh->icmp.type != ICMP6_neighbor_advertisement)
4778 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
4779 (p0->flags & VLIB_BUFFER_IS_TRACED)))
4781 u8 *t0 = vlib_add_trace (vm, node, p0,
4782 sizeof (icmp6_input_trace_t));
4783 clib_memcpy (t0, ip, sizeof (icmp6_input_trace_t));
4786 /* Check if anyone want ND events for L2 BDs */
4788 (nm->wc_ip6_nd_publisher_node != (uword) ~ 0
4789 && !ip6_address_is_link_local_unicast (&ip->src_address)))
4791 vnet_nd_wc_publish (sw_if_index, &mac, &ip->src_address);
4794 /* Check if MAC entry exsist for solicited target IP */
4795 if (ndh->icmp.type == ICMP6_neighbor_solicitation)
4797 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *opt;
4798 l2_bridge_domain_t *bd_config;
4801 opt = (void *) (ndh + 1);
4802 if ((opt->header.type !=
4803 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address) ||
4804 (opt->header.n_data_u64s != 1))
4805 return 0; /* source link layer address option not present */
4807 bd_config = vec_elt_at_index (l2input_main.bd_configs, bd_index);
4809 (u8 *) hash_get_mem (bd_config->mac_by_ip6, &ndh->target_address);
4811 { /* found ip-mac entry, generate eighbor advertisement response */
4813 vlib_node_runtime_t *error_node =
4814 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
4815 ip->dst_address = ip->src_address;
4816 ip->src_address = ndh->target_address;
4817 ip->hop_limit = 255;
4819 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
4820 clib_memcpy (opt->ethernet_address, macp, 6);
4821 ndh->icmp.type = ICMP6_neighbor_advertisement;
4822 ndh->advertisement_flags = clib_host_to_net_u32
4823 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED |
4824 ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
4825 ndh->icmp.checksum = 0;
4826 ndh->icmp.checksum =
4827 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip, &bogus_length);
4828 clib_memcpy (eth->dst_address, eth->src_address, 6);
4829 clib_memcpy (eth->src_address, macp, 6);
4830 vlib_error_count (vm, error_node->node_index,
4831 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX, 1);
4841 ip6_neighbor_proxy_add_del (u32 sw_if_index, ip6_address_t * addr, u8 is_del)
4845 fib_prefix_t pfx = {
4847 .fp_proto = FIB_PROTOCOL_IP6,
4852 ip46_address_t nh = {
4856 fib_index = ip6_fib_table_get_index_for_sw_if_index (sw_if_index);
4858 if (~0 == fib_index)
4859 return VNET_API_ERROR_NO_SUCH_FIB;
4863 fib_table_entry_path_remove (fib_index,
4865 FIB_SOURCE_IP6_ND_PROXY,
4869 ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
4870 /* flush the ND cache of this address if it's there */
4871 vnet_unset_ip6_ethernet_neighbor (vlib_get_main (), sw_if_index, addr);
4875 fib_table_entry_path_add (fib_index,
4877 FIB_SOURCE_IP6_ND_PROXY,
4878 FIB_ENTRY_FLAG_NONE,
4882 ~0, 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
4887 static clib_error_t *
4888 set_ip6_nd_proxy_cmd (vlib_main_t * vm,
4889 unformat_input_t * input, vlib_cli_command_t * cmd)
4891 vnet_main_t *vnm = vnet_get_main ();
4892 clib_error_t *error = 0;
4897 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4899 /* get the rest of the command */
4900 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
4902 if (unformat (input, "%U", unformat_ip6_address, &addr))
4904 else if (unformat (input, "delete") || unformat (input, "del"))
4907 return (unformat_parse_error (input));
4911 ip6_neighbor_proxy_add_del (sw_if_index, &addr, is_del);
4917 VLIB_CLI_COMMAND (set_ip6_nd_proxy_command, static) =
4919 .path = "set ip6 nd proxy",
4920 .short_help = "set ip6 nd proxy <HOST> <INTERFACE>",
4921 .function = set_ip6_nd_proxy_cmd,
4926 ethernet_ndp_change_mac (u32 sw_if_index)
4928 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4933 pool_foreach (n, nm->neighbor_pool,
4935 if (n->key.sw_if_index == sw_if_index)
4937 adj_nbr_walk_nh6 (sw_if_index,
4938 &n->key.ip6_address,
4939 ip6_nd_mk_complete_walk, n);
4944 ai = adj_glean_get (FIB_PROTOCOL_IP6, sw_if_index);
4946 if (ADJ_INDEX_INVALID != ai)
4947 adj_glean_update_rewrite (ai);
4951 send_ip6_na (vlib_main_t * vm, u32 sw_if_index)
4953 ip6_main_t *i6m = &ip6_main;
4954 ip6_address_t *ip6_addr = ip6_interface_first_address (i6m, sw_if_index);
4956 send_ip6_na_w_addr (vm, ip6_addr, sw_if_index);
4960 send_ip6_na_w_addr (vlib_main_t * vm,
4961 const ip6_address_t * ip6_addr, u32 sw_if_index)
4963 ip6_main_t *i6m = &ip6_main;
4964 vnet_main_t *vnm = vnet_get_main ();
4965 u8 *rewrite, rewrite_len;
4966 vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
4972 ("Sending unsolicitated NA IP6 address %U on sw_if_idex %d",
4973 format_ip6_address, ip6_addr, sw_if_index);
4975 /* Form unsolicited neighbor advertisement packet from NS pkt template */
4978 icmp6_neighbor_solicitation_header_t *h =
4979 vlib_packet_template_get_packet (vm,
4980 &i6m->discover_neighbor_packet_template,
4985 ip6_set_reserved_multicast_address (&h->ip.dst_address,
4986 IP6_MULTICAST_SCOPE_link_local,
4987 IP6_MULTICAST_GROUP_ID_all_hosts);
4988 h->ip.src_address = ip6_addr[0];
4989 h->neighbor.icmp.type = ICMP6_neighbor_advertisement;
4990 h->neighbor.target_address = ip6_addr[0];
4991 h->neighbor.advertisement_flags = clib_host_to_net_u32
4992 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
4993 h->link_layer_option.header.type =
4994 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
4995 clib_memcpy (h->link_layer_option.ethernet_address,
4996 hi->hw_address, vec_len (hi->hw_address));
4997 h->neighbor.icmp.checksum =
4998 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
4999 ASSERT (bogus_length == 0);
5001 /* Setup MAC header with IP6 Etype and mcast DMAC */
5002 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
5003 ip6_multicast_ethernet_address (dst_address,
5004 IP6_MULTICAST_GROUP_ID_all_hosts);
5006 ethernet_build_rewrite (vnm, sw_if_index, VNET_LINK_IP6, dst_address);
5007 rewrite_len = vec_len (rewrite);
5008 vlib_buffer_advance (b, -rewrite_len);
5009 ethernet_header_t *e = vlib_buffer_get_current (b);
5010 clib_memcpy (e->dst_address, rewrite, rewrite_len);
5013 /* Send unsolicited ND advertisement packet out the specified interface */
5014 vnet_buffer (b)->sw_if_index[VLIB_RX] =
5015 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
5016 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
5017 u32 *to_next = vlib_frame_vector_args (f);
5020 vlib_put_frame_to_node (vm, hi->output_node_index, f);
5025 * fd.io coding-style-patch-verification: ON
5028 * eval: (c-set-style "gnu")