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>
31 * @brief IPv6 Neighbor Adjacency and Neighbor Discovery.
33 * The files contains the API and CLI code for managing IPv6 neighbor
34 * adjacency tables and neighbor discovery logic.
37 /* can't use sizeof link_layer_address, that's 8 */
38 #define ETHER_MAC_ADDR_LEN 6
40 /* advertised prefix option */
43 /* basic advertised information */
47 int adv_autonomous_flag;
48 u32 adv_valid_lifetime_in_secs;
49 u32 adv_pref_lifetime_in_secs;
51 /* advertised values are computed from these times if decrementing */
52 f64 valid_lifetime_expires;
53 f64 pref_lifetime_expires;
55 /* local information */
57 int deprecated_prefix_flag;
58 int decrement_lifetime_flag;
60 #define MIN_ADV_VALID_LIFETIME 7203 /* seconds */
61 #define DEF_ADV_VALID_LIFETIME 2592000
62 #define DEF_ADV_PREF_LIFETIME 604800
64 /* extensions are added here, mobile, DNS etc.. */
70 /* group information */
72 ip6_address_t mcast_address;
74 ip6_address_t *mcast_source_address_pool;
77 /* configured router advertisement information per ipv6 interface */
81 /* advertised config information, zero means unspecified */
85 u16 adv_router_lifetime_in_sec;
86 u32 adv_neighbor_reachable_time_in_msec;
87 u32 adv_time_in_msec_between_retransmitted_neighbor_solicitations;
92 /* source link layer option */
93 u8 link_layer_address[8];
94 u8 link_layer_addr_len;
97 ip6_radv_prefix_t *adv_prefixes_pool;
99 /* Hash table mapping address to index in interface advertised prefix pool. */
100 mhash_t address_to_prefix_index;
102 /* MLDP group information */
103 ip6_mldp_group_t *mldp_group_pool;
105 /* Hash table mapping address to index in mldp address pool. */
106 mhash_t address_to_mldp_index;
108 /* local information */
110 int send_radv; /* radv on/off on this interface - set by config */
111 int cease_radv; /* we are ceasing to send - set byf config */
113 int adv_link_layer_address;
115 int failed_device_check;
116 int all_routers_mcast;
120 adj_index_t mcast_adj_index;
122 /* timing information */
123 #define DEF_MAX_RADV_INTERVAL 200
124 #define DEF_MIN_RADV_INTERVAL .75 * DEF_MAX_RADV_INTERVAL
125 #define DEF_CURR_HOP_LIMIT 64
126 #define DEF_DEF_RTR_LIFETIME 3 * DEF_MAX_RADV_INTERVAL
127 #define MAX_DEF_RTR_LIFETIME 9000
129 #define MAX_INITIAL_RTR_ADVERT_INTERVAL 16 /* seconds */
130 #define MAX_INITIAL_RTR_ADVERTISEMENTS 3 /*transmissions */
131 #define MIN_DELAY_BETWEEN_RAS 3 /* seconds */
132 #define MAX_DELAY_BETWEEN_RAS 1800 /* seconds */
133 #define MAX_RA_DELAY_TIME .5 /* seconds */
135 f64 max_radv_interval;
136 f64 min_radv_interval;
137 f64 min_delay_between_radv;
138 f64 max_delay_between_radv;
139 f64 max_rtr_default_lifetime;
142 f64 last_multicast_time;
143 f64 next_multicast_time;
146 u32 initial_adverts_count;
147 f64 initial_adverts_interval;
148 u32 initial_adverts_sent;
151 u32 n_advertisements_sent;
152 u32 n_solicitations_rcvd;
153 u32 n_solicitations_dropped;
155 /* Link local address to use (defaults to underlying physical for logical interfaces */
156 ip6_address_t link_local_address;
158 /* router solicitations sending state */
159 u8 keep_sending_rs; /* when true then next fields are valid */
160 icmp6_send_router_solicitation_params_t params;
165 vlib_buffer_t *buffer;
174 /* Used for nd event notification only */
177 } pending_resolution_t;
182 /* Hash tables mapping name to opcode. */
183 uword *opcode_by_name;
185 /* lite beer "glean" adjacency handling */
186 mhash_t pending_resolutions_by_address;
187 pending_resolution_t *pending_resolutions;
189 /* Mac address change notification */
190 mhash_t mac_changes_by_address;
191 pending_resolution_t *mac_changes;
193 u32 *neighbor_input_next_index_by_hw_if_index;
195 ip6_neighbor_t *neighbor_pool;
197 mhash_t neighbor_index_by_key;
199 u32 *if_radv_pool_index_by_sw_if_index;
201 ip6_radv_t *if_radv_pool;
203 /* Neighbor attack mitigation */
204 u32 limit_neighbor_cache_size;
205 u32 neighbor_delete_rotor;
207 /* Wildcard nd report publisher */
208 uword wc_ip6_nd_publisher_node;
209 uword wc_ip6_nd_publisher_et;
211 /* Router advertisement report publisher */
212 uword ip6_ra_publisher_node;
213 uword ip6_ra_publisher_et;
214 } ip6_neighbor_main_t;
216 /* ipv6 neighbor discovery - timer/event types */
220 } ip6_icmp_neighbor_discovery_event_type_t;
230 } ip6_icmp_neighbor_discovery_event_data_t;
232 static ip6_neighbor_main_t ip6_neighbor_main;
233 static ip6_address_t ip6a_zero; /* ip6 address 0 */
235 static void wc_nd_signal_report (wc_nd_report_t * r);
236 static void ra_signal_report (ra_report_t * r);
239 * @brief publish wildcard arp event
240 * @param sw_if_index The interface on which the ARP entires are acted
243 vnet_nd_wc_publish (u32 sw_if_index, u8 * mac, ip6_address_t * ip6)
246 .sw_if_index = sw_if_index,
249 memcpy (r.mac, mac, sizeof r.mac);
251 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
252 vl_api_rpc_call_main_thread (wc_nd_signal_report, (u8 *) & r, sizeof r);
257 wc_nd_signal_report (wc_nd_report_t * r)
259 vlib_main_t *vm = vlib_get_main ();
260 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
261 uword ni = nm->wc_ip6_nd_publisher_node;
262 uword et = nm->wc_ip6_nd_publisher_et;
264 if (ni == (uword) ~ 0)
267 vlib_process_signal_event_data (vm, ni, et, 1, sizeof *q);
273 wc_nd_set_publisher_node (uword node_index, uword event_type)
275 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
276 nm->wc_ip6_nd_publisher_node = node_index;
277 nm->wc_ip6_nd_publisher_et = event_type;
281 ra_publish (ra_report_t * r)
283 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
284 vl_api_rpc_call_main_thread (ra_signal_report, (u8 *) r, sizeof *r);
289 ra_signal_report (ra_report_t * r)
291 vlib_main_t *vm = vlib_get_main ();
292 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
293 uword ni = nm->ip6_ra_publisher_node;
294 uword et = nm->ip6_ra_publisher_et;
296 if (ni == (uword) ~ 0)
298 ra_report_t *q = vlib_process_signal_event_data (vm, ni, et, 1, sizeof *q);
304 ra_set_publisher_node (uword node_index, uword event_type)
306 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
307 nm->ip6_ra_publisher_node = node_index;
308 nm->ip6_ra_publisher_et = event_type;
312 format_ip6_neighbor_ip6_entry (u8 * s, va_list * va)
314 vlib_main_t *vm = va_arg (*va, vlib_main_t *);
315 ip6_neighbor_t *n = va_arg (*va, ip6_neighbor_t *);
316 vnet_main_t *vnm = vnet_get_main ();
317 vnet_sw_interface_t *si;
321 return format (s, "%=12s%=25s%=6s%=20s%=40s", "Time", "Address", "Flags",
322 "Link layer", "Interface");
324 if (n->flags & IP6_NEIGHBOR_FLAG_DYNAMIC)
325 flags = format (flags, "D");
327 if (n->flags & IP6_NEIGHBOR_FLAG_STATIC)
328 flags = format (flags, "S");
330 if (n->flags & IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY)
331 flags = format (flags, "N");
333 si = vnet_get_sw_interface (vnm, n->key.sw_if_index);
334 s = format (s, "%=12U%=25U%=6s%=20U%=40U",
335 format_vlib_cpu_time, vm, n->cpu_time_last_updated,
336 format_ip6_address, &n->key.ip6_address,
337 flags ? (char *) flags : "",
338 format_ethernet_address, n->link_layer_address,
339 format_vnet_sw_interface_name, vnm, si);
346 ip6_neighbor_adj_fib_remove (ip6_neighbor_t * n, u32 fib_index)
348 if (FIB_NODE_INDEX_INVALID != n->fib_entry_index)
350 if (ip6_address_is_link_local_unicast (&n->key.ip6_address))
352 ip6_ll_prefix_t pfx = {
353 .ilp_addr = n->key.ip6_address,
354 .ilp_sw_if_index = n->key.sw_if_index,
356 ip6_ll_table_entry_delete (&pfx);
362 .fp_proto = FIB_PROTOCOL_IP6,
363 .fp_addr.ip6 = n->key.ip6_address,
365 fib_table_entry_path_remove (fib_index,
370 n->key.sw_if_index, ~0,
371 1, FIB_ROUTE_PATH_FLAG_NONE);
376 static clib_error_t *
377 ip6_neighbor_sw_interface_up_down (vnet_main_t * vnm,
378 u32 sw_if_index, u32 flags)
380 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
383 if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
385 u32 i, *to_delete = 0;
388 pool_foreach (n, nm->neighbor_pool,
390 if (n->key.sw_if_index == sw_if_index)
391 vec_add1 (to_delete, n - nm->neighbor_pool);
395 for (i = 0; i < vec_len (to_delete); i++)
397 n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
398 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
399 ip6_neighbor_adj_fib_remove (n,
400 ip6_fib_table_get_index_for_sw_if_index
401 (n->key.sw_if_index));
402 pool_put (nm->neighbor_pool, n);
404 vec_free (to_delete);
410 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_neighbor_sw_interface_up_down);
413 unset_random_neighbor_entry (void)
415 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
416 vnet_main_t *vnm = vnet_get_main ();
417 vlib_main_t *vm = vnm->vlib_main;
421 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
422 nm->neighbor_delete_rotor = index;
424 /* Try again from elt 0, could happen if an intfc goes down */
427 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
428 nm->neighbor_delete_rotor = index;
431 /* Nothing left in the pool */
435 e = pool_elt_at_index (nm->neighbor_pool, index);
437 vnet_unset_ip6_ethernet_neighbor (vm, e->key.sw_if_index,
439 e->link_layer_address,
448 u8 link_layer_address[6];
451 } ip6_neighbor_set_unset_rpc_args_t;
453 static void ip6_neighbor_set_unset_rpc_callback
454 (ip6_neighbor_set_unset_rpc_args_t * a);
456 static void set_unset_ip6_neighbor_rpc
459 ip6_address_t * a, u8 * link_layer_address, int is_add, int is_static,
462 ip6_neighbor_set_unset_rpc_args_t args;
463 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
465 args.sw_if_index = sw_if_index;
466 args.is_add = is_add;
467 args.is_static = is_static;
468 args.is_no_fib_entry = is_no_fib_entry;
469 clib_memcpy (&args.addr, a, sizeof (*a));
470 if (NULL != link_layer_address)
471 clib_memcpy (args.link_layer_address, link_layer_address, 6);
473 vl_api_rpc_call_main_thread (ip6_neighbor_set_unset_rpc_callback,
474 (u8 *) & args, sizeof (args));
478 ip6_nbr_probe (ip_adjacency_t * adj)
480 icmp6_neighbor_solicitation_header_t *h;
481 vnet_main_t *vnm = vnet_get_main ();
482 ip6_main_t *im = &ip6_main;
483 ip_interface_address_t *ia;
484 ip6_address_t *dst, *src;
485 vnet_hw_interface_t *hi;
486 vnet_sw_interface_t *si;
492 vm = vlib_get_main ();
494 si = vnet_get_sw_interface (vnm, adj->rewrite_header.sw_if_index);
495 dst = &adj->sub_type.nbr.next_hop.ip6;
497 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
501 src = ip6_interface_address_matching_destination (im, dst,
509 h = vlib_packet_template_get_packet (vm,
510 &im->discover_neighbor_packet_template,
513 hi = vnet_get_sup_hw_interface (vnm, adj->rewrite_header.sw_if_index);
515 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
516 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
517 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
518 h->ip.src_address = src[0];
519 h->neighbor.target_address = dst[0];
521 clib_memcpy (h->link_layer_option.ethernet_address,
522 hi->hw_address, vec_len (hi->hw_address));
524 h->neighbor.icmp.checksum =
525 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
526 ASSERT (bogus_length == 0);
528 b = vlib_get_buffer (vm, bi);
529 vnet_buffer (b)->sw_if_index[VLIB_RX] =
530 vnet_buffer (b)->sw_if_index[VLIB_TX] = adj->rewrite_header.sw_if_index;
532 /* Add encapsulation string for software interface (e.g. ethernet header). */
533 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
534 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
537 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
538 u32 *to_next = vlib_frame_vector_args (f);
541 vlib_put_frame_to_node (vm, hi->output_node_index, f);
546 ip6_nd_mk_complete (adj_index_t ai, ip6_neighbor_t * nbr)
548 adj_nbr_update_rewrite (ai, ADJ_NBR_REWRITE_FLAG_COMPLETE,
549 ethernet_build_rewrite (vnet_get_main (),
550 nbr->key.sw_if_index,
551 adj_get_link_type (ai),
552 nbr->link_layer_address));
556 ip6_nd_mk_incomplete (adj_index_t ai)
558 ip_adjacency_t *adj = adj_get (ai);
560 adj_nbr_update_rewrite (ai,
561 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
562 ethernet_build_rewrite (vnet_get_main (),
565 adj_get_link_type (ai),
566 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
569 #define IP6_NBR_MK_KEY(k, sw_if_index, addr) \
571 k.sw_if_index = sw_if_index; \
572 k.ip6_address = *addr; \
576 static ip6_neighbor_t *
577 ip6_nd_find (u32 sw_if_index, const ip6_address_t * addr)
579 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
580 ip6_neighbor_t *n = NULL;
581 ip6_neighbor_key_t k;
584 IP6_NBR_MK_KEY (k, sw_if_index, addr);
586 p = mhash_get (&nm->neighbor_index_by_key, &k);
589 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
596 ip6_nd_mk_complete_walk (adj_index_t ai, void *ctx)
598 ip6_neighbor_t *nbr = ctx;
600 ip6_nd_mk_complete (ai, nbr);
602 return (ADJ_WALK_RC_CONTINUE);
606 ip6_nd_mk_incomplete_walk (adj_index_t ai, void *ctx)
608 ip6_nd_mk_incomplete (ai);
610 return (ADJ_WALK_RC_CONTINUE);
614 ip6_ethernet_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
621 nbr = ip6_nd_find (sw_if_index, &adj->sub_type.nbr.next_hop.ip6);
623 switch (adj->lookup_next_index)
625 case IP_LOOKUP_NEXT_GLEAN:
626 adj_glean_update_rewrite (ai);
628 case IP_LOOKUP_NEXT_ARP:
631 adj_nbr_walk_nh6 (sw_if_index, &nbr->key.ip6_address,
632 ip6_nd_mk_complete_walk, nbr);
637 * no matching ND entry.
638 * construct the rewrite required to for an ND packet, and stick
639 * that in the adj's pipe to smoke.
641 adj_nbr_update_rewrite (ai,
642 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
643 ethernet_build_rewrite (vnm,
646 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
649 * since the FIB has added this adj for a route, it makes sense it may
650 * want to forward traffic sometime soon. Let's send a speculative ND.
651 * just one. If we were to do periodically that wouldn't be bad either,
652 * but that's more code than i'm prepared to write at this time for
653 * relatively little reward.
658 case IP_LOOKUP_NEXT_MCAST:
661 * Construct a partial rewrite from the known ethernet mcast dest MAC
666 rewrite = ethernet_build_rewrite (vnm,
669 ethernet_ip6_mcast_dst_addr ());
672 * Complete the remaining fields of the adj's rewrite to direct the
673 * complete of the rewrite at switch time by copying in the IP
674 * dst address's bytes.
675 * Ofset is 2 bytes into the desintation address. And we write 4 bytes.
677 offset = vec_len (rewrite) - 2;
678 adj_mcast_update_rewrite (ai, rewrite, offset, 0xffffffff);
682 case IP_LOOKUP_NEXT_DROP:
683 case IP_LOOKUP_NEXT_PUNT:
684 case IP_LOOKUP_NEXT_LOCAL:
685 case IP_LOOKUP_NEXT_REWRITE:
686 case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
687 case IP_LOOKUP_NEXT_MIDCHAIN:
688 case IP_LOOKUP_NEXT_ICMP_ERROR:
689 case IP_LOOKUP_N_NEXT:
697 ip6_neighbor_adj_fib_add (ip6_neighbor_t * n, u32 fib_index)
699 if (ip6_address_is_link_local_unicast (&n->key.ip6_address))
701 ip6_ll_prefix_t pfx = {
702 .ilp_addr = n->key.ip6_address,
703 .ilp_sw_if_index = n->key.sw_if_index,
706 ip6_ll_table_entry_update (&pfx, FIB_ROUTE_PATH_FLAG_NONE);
712 .fp_proto = FIB_PROTOCOL_IP6,
713 .fp_addr.ip6 = n->key.ip6_address,
717 fib_table_entry_path_add (fib_index, &pfx, FIB_SOURCE_ADJ,
718 FIB_ENTRY_FLAG_ATTACHED,
719 DPO_PROTO_IP6, &pfx.fp_addr,
720 n->key.sw_if_index, ~0, 1, NULL,
721 FIB_ROUTE_PATH_FLAG_NONE);
726 vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
729 u8 * link_layer_address,
730 uword n_bytes_link_layer_address,
731 int is_static, int is_no_fib_entry)
733 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
734 ip6_neighbor_key_t k;
735 ip6_neighbor_t *n = 0;
736 int make_new_nd_cache_entry = 1;
739 pending_resolution_t *pr, *mc;
741 if (vlib_get_thread_index ())
743 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
744 1 /* set new neighbor */ , is_static,
749 k.sw_if_index = sw_if_index;
750 k.ip6_address = a[0];
753 p = mhash_get (&nm->neighbor_index_by_key, &k);
756 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
757 /* Refuse to over-write static neighbor entry. */
758 if (!is_static && (n->flags & IP6_NEIGHBOR_FLAG_STATIC))
760 make_new_nd_cache_entry = 0;
763 if (make_new_nd_cache_entry)
765 pool_get (nm->neighbor_pool, n);
766 mhash_set (&nm->neighbor_index_by_key, &k, n - nm->neighbor_pool,
769 n->fib_entry_index = FIB_NODE_INDEX_INVALID;
771 clib_memcpy (n->link_layer_address,
772 link_layer_address, n_bytes_link_layer_address);
775 * create the adj-fib. the entry in the FIB table for and to the peer.
777 if (!is_no_fib_entry)
779 ip6_neighbor_adj_fib_add
780 (n, ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index));
784 n->flags |= IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY;
790 * prevent a DoS attack from the data-plane that
791 * spams us with no-op updates to the MAC address
793 if (0 == memcmp (n->link_layer_address,
794 link_layer_address, n_bytes_link_layer_address))
795 goto check_customers;
797 clib_memcpy (n->link_layer_address,
798 link_layer_address, n_bytes_link_layer_address);
801 /* Update time stamp and flags. */
802 n->cpu_time_last_updated = clib_cpu_time_now ();
804 n->flags |= IP6_NEIGHBOR_FLAG_STATIC;
806 n->flags |= IP6_NEIGHBOR_FLAG_DYNAMIC;
808 adj_nbr_walk_nh6 (sw_if_index,
809 &n->key.ip6_address, ip6_nd_mk_complete_walk, n);
812 /* Customer(s) waiting for this address to be resolved? */
813 p = mhash_get (&nm->pending_resolutions_by_address, a);
818 while (next_index != (u32) ~ 0)
820 pr = pool_elt_at_index (nm->pending_resolutions, next_index);
821 vlib_process_signal_event (vm, pr->node_index,
822 pr->type_opaque, pr->data);
823 next_index = pr->next_index;
824 pool_put (nm->pending_resolutions, pr);
827 mhash_unset (&nm->pending_resolutions_by_address, a, 0);
830 /* Customer(s) requesting ND event for this address? */
831 p = mhash_get (&nm->mac_changes_by_address, a);
836 while (next_index != (u32) ~ 0)
838 int (*fp) (u32, u8 *, u32, ip6_address_t *);
840 mc = pool_elt_at_index (nm->mac_changes, next_index);
841 fp = mc->data_callback;
843 /* Call the user's data callback, return 1 to suppress dup events */
846 (*fp) (mc->data, link_layer_address, sw_if_index, &ip6a_zero);
848 * Signal the resolver process, as long as the user
849 * says they want to be notified
852 vlib_process_signal_event (vm, mc->node_index,
853 mc->type_opaque, mc->data);
854 next_index = mc->next_index;
862 vnet_unset_ip6_ethernet_neighbor (vlib_main_t * vm,
865 u8 * link_layer_address,
866 uword n_bytes_link_layer_address)
868 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
869 ip6_neighbor_key_t k;
874 if (vlib_get_thread_index ())
876 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
877 0 /* unset */ , 0, 0);
881 k.sw_if_index = sw_if_index;
882 k.ip6_address = a[0];
885 p = mhash_get (&nm->neighbor_index_by_key, &k);
892 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
893 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
895 adj_nbr_walk_nh6 (sw_if_index,
896 &n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL);
899 if (FIB_NODE_INDEX_INVALID != n->fib_entry_index)
903 .fp_proto = FIB_PROTOCOL_IP6,
904 .fp_addr.ip6 = n->key.ip6_address,
906 fib_table_entry_path_remove
907 (ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index),
911 &pfx.fp_addr, n->key.sw_if_index, ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
913 pool_put (nm->neighbor_pool, n);
919 static void ip6_neighbor_set_unset_rpc_callback
920 (ip6_neighbor_set_unset_rpc_args_t * a)
922 vlib_main_t *vm = vlib_get_main ();
924 vnet_set_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
925 a->link_layer_address, 6, a->is_static,
928 vnet_unset_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
929 a->link_layer_address, 6);
933 ip6_neighbor_sort (void *a1, void *a2)
935 vnet_main_t *vnm = vnet_get_main ();
936 ip6_neighbor_t *n1 = a1, *n2 = a2;
938 cmp = vnet_sw_interface_compare (vnm, n1->key.sw_if_index,
939 n2->key.sw_if_index);
941 cmp = ip6_address_compare (&n1->key.ip6_address, &n2->key.ip6_address);
946 ip6_neighbors_entries (u32 sw_if_index)
948 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
949 ip6_neighbor_t *n, *ns = 0;
952 pool_foreach (n, nm->neighbor_pool,
954 if (sw_if_index != ~0 && n->key.sw_if_index != sw_if_index)
961 vec_sort_with_function (ns, ip6_neighbor_sort);
965 static clib_error_t *
966 show_ip6_neighbors (vlib_main_t * vm,
967 unformat_input_t * input, vlib_cli_command_t * cmd)
969 vnet_main_t *vnm = vnet_get_main ();
970 ip6_neighbor_t *n, *ns;
971 clib_error_t *error = 0;
974 /* Filter entries by interface if given. */
976 (void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index);
978 ns = ip6_neighbors_entries (sw_if_index);
981 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, 0);
984 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, n);
993 * This command is used to display the adjacent IPv6 hosts found via
994 * neighbor discovery. Optionally, limit the output to the specified
998 * Example of how to display the IPv6 neighbor adjacency table:
999 * @cliexstart{show ip6 neighbors}
1000 * Time Address Flags Link layer Interface
1001 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
1002 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
1003 * 886.6654 ::1:1:c:0:9 S 02:fe:e4:45:27:5b GigabitEthernet3/0/0
1005 * Example of how to display the IPv6 neighbor adjacency table for given interface:
1006 * @cliexstart{show ip6 neighbors GigabitEthernet2/0/0}
1007 * Time Address Flags Link layer Interface
1008 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
1009 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
1013 VLIB_CLI_COMMAND (show_ip6_neighbors_command, static) = {
1014 .path = "show ip6 neighbors",
1015 .function = show_ip6_neighbors,
1016 .short_help = "show ip6 neighbors [<interface>]",
1020 static clib_error_t *
1021 set_ip6_neighbor (vlib_main_t * vm,
1022 unformat_input_t * input, vlib_cli_command_t * cmd)
1024 vnet_main_t *vnm = vnet_get_main ();
1030 int is_no_fib_entry = 0;
1033 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1035 /* intfc, ip6-address, mac-address */
1036 if (unformat (input, "%U %U %U",
1037 unformat_vnet_sw_interface, vnm, &sw_if_index,
1038 unformat_ip6_address, &addr,
1039 unformat_ethernet_address, mac_address))
1042 else if (unformat (input, "delete") || unformat (input, "del"))
1044 else if (unformat (input, "static"))
1046 else if (unformat (input, "no-fib-entry"))
1047 is_no_fib_entry = 1;
1053 return clib_error_return (0, "Missing interface, ip6 or hw address");
1056 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
1057 mac_address, sizeof (mac_address),
1058 is_static, is_no_fib_entry);
1060 vnet_unset_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
1061 mac_address, sizeof (mac_address));
1066 * This command is used to manually add an entry to the IPv6 neighbor
1067 * adjacency table. Optionally, the entry can be added as static. It is
1068 * also used to remove an entry from the table. Use the '<em>show ip6
1069 * neighbors</em>' command to display all learned and manually entered entries.
1072 * Example of how to add a static entry to the IPv6 neighbor adjacency table:
1073 * @cliexcmd{set ip6 neighbor GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b static}
1074 * Example of how to delete an entry from the IPv6 neighbor adjacency table:
1075 * @cliexcmd{set ip6 neighbor del GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b}
1078 VLIB_CLI_COMMAND (set_ip6_neighbor_command, static) =
1080 .path = "set ip6 neighbor",
1081 .function = set_ip6_neighbor,
1082 .short_help = "set ip6 neighbor [del] <interface> <ip6-address> <mac-address> [static]",
1088 ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP,
1089 ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY,
1090 ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
1091 } icmp6_neighbor_solicitation_or_advertisement_next_t;
1093 static_always_inline uword
1094 icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
1095 vlib_node_runtime_t * node,
1096 vlib_frame_t * frame,
1097 uword is_solicitation)
1099 vnet_main_t *vnm = vnet_get_main ();
1100 ip6_main_t *im = &ip6_main;
1101 uword n_packets = frame->n_vectors;
1102 u32 *from, *to_next;
1103 u32 n_left_from, n_left_to_next, next_index, n_advertisements_sent;
1104 icmp6_neighbor_discovery_option_type_t option_type;
1105 vlib_node_runtime_t *error_node =
1106 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1109 from = vlib_frame_vector_args (frame);
1110 n_left_from = n_packets;
1111 next_index = node->cached_next_index;
1113 if (node->flags & VLIB_NODE_FLAG_TRACE)
1114 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1116 sizeof (icmp6_input_trace_t));
1120 ? ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address
1121 : ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address);
1122 n_advertisements_sent = 0;
1124 while (n_left_from > 0)
1126 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1128 while (n_left_from > 0 && n_left_to_next > 0)
1132 icmp6_neighbor_solicitation_or_advertisement_header_t *h0;
1133 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1134 u32 bi0, options_len0, sw_if_index0, next0, error0;
1135 u32 ip6_sadd_link_local, ip6_sadd_unspecified;
1139 bi0 = to_next[0] = from[0];
1144 n_left_to_next -= 1;
1146 p0 = vlib_get_buffer (vm, bi0);
1147 ip0 = vlib_buffer_get_current (p0);
1148 h0 = ip6_next_header (ip0);
1150 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1152 error0 = ICMP6_ERROR_NONE;
1153 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1154 ip6_sadd_link_local =
1155 ip6_address_is_link_local_unicast (&ip0->src_address);
1156 ip6_sadd_unspecified =
1157 ip6_address_is_unspecified (&ip0->src_address);
1159 /* Check that source address is unspecified, link-local or else on-link. */
1160 if (!ip6_sadd_unspecified && !ip6_sadd_link_local)
1162 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1164 if (ADJ_INDEX_INVALID != src_adj_index0)
1166 ip_adjacency_t *adj0 = adj_get (src_adj_index0);
1168 /* Allow all realistic-looking rewrite adjacencies to pass */
1169 ni0 = adj0->lookup_next_index;
1170 is_rewrite0 = (ni0 >= IP_LOOKUP_NEXT_ARP) &&
1171 (ni0 < IP6_LOOKUP_N_NEXT);
1173 error0 = ((adj0->rewrite_header.sw_if_index != sw_if_index0
1176 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK
1182 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK;
1186 o0 = (void *) (h0 + 1);
1187 o0 = ((options_len0 == 8 && o0->header.type == option_type
1188 && o0->header.n_data_u64s == 1) ? o0 : 0);
1190 /* If src address unspecified or link local, donot learn neighbor MAC */
1191 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1192 !ip6_sadd_unspecified))
1194 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1195 if (nm->limit_neighbor_cache_size &&
1196 pool_elts (nm->neighbor_pool) >=
1197 nm->limit_neighbor_cache_size)
1198 unset_random_neighbor_entry ();
1199 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1202 &h0->target_address,
1203 o0->ethernet_address,
1204 sizeof (o0->ethernet_address),
1208 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1210 /* Check that target address is local to this router. */
1211 fib_node_index_t fei;
1215 ip6_fib_table_get_index_for_sw_if_index (sw_if_index0);
1217 if (~0 == fib_index)
1219 error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1223 if (ip6_address_is_link_local_unicast (&h0->target_address))
1225 fei = ip6_fib_table_lookup_exact_match
1226 (ip6_ll_fib_get (sw_if_index0),
1227 &h0->target_address, 128);
1231 fei = ip6_fib_table_lookup_exact_match (fib_index,
1232 &h0->target_address,
1236 if (FIB_NODE_INDEX_INVALID == fei)
1238 /* The target address is not in the FIB */
1240 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1244 if (FIB_ENTRY_FLAG_LOCAL &
1245 fib_entry_get_flags_for_source (fei,
1246 FIB_SOURCE_INTERFACE))
1248 /* It's an address that belongs to one of our interfaces
1252 if (fib_entry_is_sourced
1253 (fei, FIB_SOURCE_IP6_ND_PROXY) ||
1254 fib_entry_is_sourced (fei, FIB_SOURCE_IP6_ND))
1256 /* The address was added by IPv6 Proxy ND config.
1257 * We should only respond to these if the NS arrived on
1258 * the link that has a matching covering prefix */
1263 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1269 if (is_solicitation)
1270 next0 = (error0 != ICMP6_ERROR_NONE
1271 ? ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP
1272 : ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY);
1276 error0 = error0 == ICMP6_ERROR_NONE ?
1277 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_RX : error0;
1280 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1282 vnet_sw_interface_t *sw_if0;
1283 ethernet_interface_t *eth_if0;
1284 ethernet_header_t *eth0;
1286 /* dst address is either source address or the all-nodes mcast addr */
1287 if (!ip6_sadd_unspecified)
1288 ip0->dst_address = ip0->src_address;
1290 ip6_set_reserved_multicast_address (&ip0->dst_address,
1291 IP6_MULTICAST_SCOPE_link_local,
1292 IP6_MULTICAST_GROUP_ID_all_hosts);
1294 ip0->src_address = h0->target_address;
1295 ip0->hop_limit = 255;
1296 h0->icmp.type = ICMP6_neighbor_advertisement;
1298 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1299 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1301 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1304 clib_memcpy (o0->ethernet_address, eth_if0->address, 6);
1306 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
1309 h0->advertisement_flags = clib_host_to_net_u32
1310 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED
1311 | ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
1313 h0->icmp.checksum = 0;
1315 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1317 ASSERT (bogus_length == 0);
1319 /* Reuse current MAC header, copy SMAC to DMAC and
1320 * interface MAC to SMAC */
1321 vlib_buffer_advance (p0, -ethernet_buffer_header_size (p0));
1322 eth0 = vlib_buffer_get_current (p0);
1323 clib_memcpy (eth0->dst_address, eth0->src_address, 6);
1325 clib_memcpy (eth0->src_address, eth_if0->address, 6);
1327 /* Setup input and output sw_if_index for packet */
1328 ASSERT (vnet_buffer (p0)->sw_if_index[VLIB_RX] == sw_if_index0);
1329 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1330 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1331 vnet_main.local_interface_sw_if_index;
1333 n_advertisements_sent++;
1336 p0->error = error_node->errors[error0];
1338 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1339 to_next, n_left_to_next,
1343 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1346 /* Account for advertisements sent. */
1347 vlib_error_count (vm, error_node->node_index,
1348 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX,
1349 n_advertisements_sent);
1351 return frame->n_vectors;
1354 /* for "syslogging" - use elog for now */
1355 #define foreach_log_level \
1356 _ (DEBUG, "DEBUG") \
1357 _ (INFO, "INFORMATION") \
1358 _ (NOTICE, "NOTICE") \
1359 _ (WARNING, "WARNING") \
1361 _ (CRIT, "CRITICAL") \
1362 _ (ALERT, "ALERT") \
1363 _ (EMERG, "EMERGENCY")
1367 #define _(f,s) LOG_##f,
1372 static char *log_level_strings[] = {
1378 static int logmask = 1 << LOG_DEBUG;
1381 ip6_neighbor_syslog (vlib_main_t * vm, int priority, char *fmt, ...)
1383 /* just use elog for now */
1387 if ((priority > LOG_EMERG) || !(logmask & (1 << priority)))
1393 what = va_format (0, fmt, &va);
1395 ELOG_TYPE_DECLARE (e) =
1397 .format = "ip6 nd: (%s): %s",.format_args = "T4T4",};
1402 ed = ELOG_DATA (&vm->elog_main, e);
1403 ed->s[0] = elog_string (&vm->elog_main, log_level_strings[priority]);
1404 ed->s[1] = elog_string (&vm->elog_main, (char *) what);
1410 /* ipv6 neighbor discovery - router advertisements */
1413 ICMP6_ROUTER_SOLICITATION_NEXT_DROP,
1414 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW,
1415 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX,
1416 ICMP6_ROUTER_SOLICITATION_N_NEXT,
1417 } icmp6_router_solicitation_or_advertisement_next_t;
1419 static_always_inline uword
1420 icmp6_router_solicitation (vlib_main_t * vm,
1421 vlib_node_runtime_t * node, vlib_frame_t * frame)
1423 vnet_main_t *vnm = vnet_get_main ();
1424 ip6_main_t *im = &ip6_main;
1425 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1426 uword n_packets = frame->n_vectors;
1427 u32 *from, *to_next;
1428 u32 n_left_from, n_left_to_next, next_index;
1429 u32 n_advertisements_sent = 0;
1432 icmp6_neighbor_discovery_option_type_t option_type;
1434 vlib_node_runtime_t *error_node =
1435 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1437 from = vlib_frame_vector_args (frame);
1438 n_left_from = n_packets;
1439 next_index = node->cached_next_index;
1441 if (node->flags & VLIB_NODE_FLAG_TRACE)
1442 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1444 sizeof (icmp6_input_trace_t));
1446 /* source may append his LL address */
1447 option_type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1449 while (n_left_from > 0)
1451 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1453 while (n_left_from > 0 && n_left_to_next > 0)
1457 ip6_radv_t *radv_info = 0;
1459 icmp6_neighbor_discovery_header_t *h0;
1460 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1462 u32 bi0, options_len0, sw_if_index0, next0, error0;
1463 u32 is_solicitation = 1, is_dropped = 0;
1464 u32 is_unspecified, is_link_local;
1466 bi0 = to_next[0] = from[0];
1471 n_left_to_next -= 1;
1473 p0 = vlib_get_buffer (vm, bi0);
1474 ip0 = vlib_buffer_get_current (p0);
1475 h0 = ip6_next_header (ip0);
1477 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1478 is_unspecified = ip6_address_is_unspecified (&ip0->src_address);
1480 ip6_address_is_link_local_unicast (&ip0->src_address);
1482 error0 = ICMP6_ERROR_NONE;
1483 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1485 /* check if solicitation (not from nd_timer node) */
1486 if (ip6_address_is_unspecified (&ip0->dst_address))
1487 is_solicitation = 0;
1489 /* Check that source address is unspecified, link-local or else on-link. */
1490 if (!is_unspecified && !is_link_local)
1492 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1494 if (ADJ_INDEX_INVALID != src_adj_index0)
1496 ip_adjacency_t *adj0 = adj_get (src_adj_index0);
1498 error0 = (adj0->rewrite_header.sw_if_index != sw_if_index0
1500 ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK
1505 error0 = ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK;
1509 /* check for source LL option and process */
1510 o0 = (void *) (h0 + 1);
1511 o0 = ((options_len0 == 8
1512 && o0->header.type == option_type
1513 && o0->header.n_data_u64s == 1) ? o0 : 0);
1515 /* if src address unspecified IGNORE any options */
1516 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1517 !is_unspecified && !is_link_local))
1519 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1520 if (nm->limit_neighbor_cache_size &&
1521 pool_elts (nm->neighbor_pool) >=
1522 nm->limit_neighbor_cache_size)
1523 unset_random_neighbor_entry ();
1525 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1527 o0->ethernet_address,
1528 sizeof (o0->ethernet_address),
1532 /* default is to drop */
1533 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1535 if (error0 == ICMP6_ERROR_NONE)
1537 vnet_sw_interface_t *sw_if0;
1538 ethernet_interface_t *eth_if0;
1541 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1542 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1544 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1546 /* only support ethernet interface type for now */
1548 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1551 if (error0 == ICMP6_ERROR_NONE)
1555 /* adjust the sizeof the buffer to just include the ipv6 header */
1556 p0->current_length -=
1558 sizeof (icmp6_neighbor_discovery_header_t));
1560 /* look up the radv_t information for this interface */
1561 vec_validate_init_empty
1562 (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
1564 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1567 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1571 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1574 if (error0 == ICMP6_ERROR_NONE)
1576 f64 now = vlib_time_now (vm);
1578 /* for solicited adverts - need to rate limit */
1579 if (is_solicitation)
1581 if (0 != radv_info->last_radv_time &&
1582 (now - radv_info->last_radv_time) <
1583 MIN_DELAY_BETWEEN_RAS)
1586 radv_info->last_radv_time = now;
1590 icmp6_router_advertisement_header_t rh;
1592 rh.icmp.type = ICMP6_router_advertisement;
1594 rh.icmp.checksum = 0;
1596 rh.current_hop_limit = radv_info->curr_hop_limit;
1597 rh.router_lifetime_in_sec =
1598 clib_host_to_net_u16
1599 (radv_info->adv_router_lifetime_in_sec);
1601 time_in_msec_between_retransmitted_neighbor_solicitations
1603 clib_host_to_net_u32 (radv_info->
1604 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
1605 rh.neighbor_reachable_time_in_msec =
1606 clib_host_to_net_u32 (radv_info->
1607 adv_neighbor_reachable_time_in_msec);
1610 (radv_info->adv_managed_flag) ?
1611 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP :
1614 ((radv_info->adv_other_flag) ?
1615 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP :
1619 u16 payload_length =
1620 sizeof (icmp6_router_advertisement_header_t);
1622 vlib_buffer_add_data (vm,
1623 vlib_buffer_get_free_list_index
1624 (p0), bi0, (void *) &rh,
1626 (icmp6_router_advertisement_header_t));
1628 if (radv_info->adv_link_layer_address)
1630 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
1634 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1635 h.header.n_data_u64s = 1;
1637 /* copy ll address */
1638 clib_memcpy (&h.ethernet_address[0],
1639 eth_if0->address, 6);
1641 vlib_buffer_add_data (vm,
1642 vlib_buffer_get_free_list_index
1643 (p0), bi0, (void *) &h,
1645 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t));
1649 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t);
1652 /* add MTU option */
1653 if (radv_info->adv_link_mtu)
1655 icmp6_neighbor_discovery_mtu_option_t h;
1659 clib_host_to_net_u32 (radv_info->adv_link_mtu);
1660 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu;
1661 h.header.n_data_u64s = 1;
1664 sizeof (icmp6_neighbor_discovery_mtu_option_t);
1666 vlib_buffer_add_data (vm,
1667 vlib_buffer_get_free_list_index
1668 (p0), bi0, (void *) &h,
1670 (icmp6_neighbor_discovery_mtu_option_t));
1673 /* add advertised prefix options */
1674 ip6_radv_prefix_t *pr_info;
1677 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
1679 if(pr_info->enabled &&
1680 (!pr_info->decrement_lifetime_flag
1681 || (pr_info->pref_lifetime_expires >0)))
1683 /* advertise this prefix */
1684 icmp6_neighbor_discovery_prefix_information_option_t h;
1686 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information;
1687 h.header.n_data_u64s = (sizeof(icmp6_neighbor_discovery_prefix_information_option_t) >> 3);
1689 h.dst_address_length = pr_info->prefix_len;
1691 h.flags = (pr_info->adv_on_link_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_FLAG_ON_LINK : 0;
1692 h.flags |= (pr_info->adv_autonomous_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_AUTO : 0;
1694 if(radv_info->cease_radv && pr_info->deprecated_prefix_flag)
1696 h.valid_time = clib_host_to_net_u32(MIN_ADV_VALID_LIFETIME);
1697 h.preferred_time = 0;
1701 if(pr_info->decrement_lifetime_flag)
1703 pr_info->adv_valid_lifetime_in_secs = ((pr_info->valid_lifetime_expires > now)) ?
1704 (pr_info->valid_lifetime_expires - now) : 0;
1706 pr_info->adv_pref_lifetime_in_secs = ((pr_info->pref_lifetime_expires > now)) ?
1707 (pr_info->pref_lifetime_expires - now) : 0;
1710 h.valid_time = clib_host_to_net_u32(pr_info->adv_valid_lifetime_in_secs);
1711 h.preferred_time = clib_host_to_net_u32(pr_info->adv_pref_lifetime_in_secs) ;
1715 clib_memcpy(&h.dst_address, &pr_info->prefix, sizeof(ip6_address_t));
1717 payload_length += sizeof( icmp6_neighbor_discovery_prefix_information_option_t);
1719 vlib_buffer_add_data (vm,
1720 vlib_buffer_get_free_list_index (p0),
1722 (void *)&h, sizeof(icmp6_neighbor_discovery_prefix_information_option_t));
1728 /* add additional options before here */
1730 /* finish building the router advertisement... */
1731 if (!is_unspecified && radv_info->send_unicast)
1733 ip0->dst_address = ip0->src_address;
1737 /* target address is all-nodes mcast addr */
1738 ip6_set_reserved_multicast_address
1740 IP6_MULTICAST_SCOPE_link_local,
1741 IP6_MULTICAST_GROUP_ID_all_hosts);
1744 /* source address MUST be the link-local address */
1745 ip0->src_address = radv_info->link_local_address;
1747 ip0->hop_limit = 255;
1748 ip0->payload_length =
1749 clib_host_to_net_u16 (payload_length);
1751 icmp6_router_advertisement_header_t *rh0 =
1752 (icmp6_router_advertisement_header_t *) (ip0 + 1);
1753 rh0->icmp.checksum =
1754 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1756 ASSERT (bogus_length == 0);
1758 /* setup output if and adjacency */
1759 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1760 vnet_main.local_interface_sw_if_index;
1762 if (is_solicitation)
1764 ethernet_header_t *eth0;
1765 /* Reuse current MAC header, copy SMAC to DMAC and
1766 * interface MAC to SMAC */
1767 vlib_buffer_reset (p0);
1768 eth0 = vlib_buffer_get_current (p0);
1769 clib_memcpy (eth0->dst_address, eth0->src_address,
1771 clib_memcpy (eth0->src_address, eth_if0->address,
1774 is_dropped ? next0 :
1775 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX;
1776 vnet_buffer (p0)->sw_if_index[VLIB_TX] =
1781 adj_index0 = radv_info->mcast_adj_index;
1782 if (adj_index0 == 0)
1783 error0 = ICMP6_ERROR_DST_LOOKUP_MISS;
1787 is_dropped ? next0 :
1788 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW;
1789 vnet_buffer (p0)->ip.adj_index[VLIB_TX] =
1793 p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
1795 radv_info->n_solicitations_dropped += is_dropped;
1796 radv_info->n_solicitations_rcvd += is_solicitation;
1798 if ((error0 == ICMP6_ERROR_NONE) && !is_dropped)
1800 radv_info->n_advertisements_sent++;
1801 n_advertisements_sent++;
1807 p0->error = error_node->errors[error0];
1809 if (error0 != ICMP6_ERROR_NONE)
1810 vlib_error_count (vm, error_node->node_index, error0, 1);
1812 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1813 to_next, n_left_to_next,
1818 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1821 /* Account for router advertisements sent. */
1822 vlib_error_count (vm, error_node->node_index,
1823 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_TX,
1824 n_advertisements_sent);
1826 return frame->n_vectors;
1829 /* validate advertised info for consistancy (see RFC-4861 section 6.2.7) - log any inconsistencies, packet will always be dropped */
1830 static_always_inline uword
1831 icmp6_router_advertisement (vlib_main_t * vm,
1832 vlib_node_runtime_t * node, vlib_frame_t * frame)
1834 vnet_main_t *vnm = vnet_get_main ();
1835 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1836 uword n_packets = frame->n_vectors;
1837 u32 *from, *to_next;
1838 u32 n_left_from, n_left_to_next, next_index;
1839 u32 n_advertisements_rcvd = 0;
1841 vlib_node_runtime_t *error_node =
1842 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1844 from = vlib_frame_vector_args (frame);
1845 n_left_from = n_packets;
1846 next_index = node->cached_next_index;
1848 if (node->flags & VLIB_NODE_FLAG_TRACE)
1849 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1851 sizeof (icmp6_input_trace_t));
1853 while (n_left_from > 0)
1855 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1857 while (n_left_from > 0 && n_left_to_next > 0)
1861 ip6_radv_t *radv_info = 0;
1862 icmp6_router_advertisement_header_t *h0;
1863 u32 bi0, options_len0, sw_if_index0, next0, error0;
1865 bi0 = to_next[0] = from[0];
1870 n_left_to_next -= 1;
1872 p0 = vlib_get_buffer (vm, bi0);
1873 ip0 = vlib_buffer_get_current (p0);
1874 h0 = ip6_next_header (ip0);
1876 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1878 error0 = ICMP6_ERROR_NONE;
1879 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1881 /* Check that source address is link-local */
1882 error0 = (!ip6_address_is_link_local_unicast (&ip0->src_address)) ?
1883 ICMP6_ERROR_ROUTER_ADVERTISEMENT_SOURCE_NOT_LINK_LOCAL : error0;
1885 /* default is to drop */
1886 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1888 n_advertisements_rcvd++;
1890 if (error0 == ICMP6_ERROR_NONE)
1892 vnet_sw_interface_t *sw_if0;
1893 ethernet_interface_t *eth_if0;
1895 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1896 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1898 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1900 /* only support ethernet interface type for now */
1902 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1905 if (error0 == ICMP6_ERROR_NONE)
1909 /* look up the radv_t information for this interface */
1910 vec_validate_init_empty
1911 (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
1913 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1916 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1920 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1923 if (error0 == ICMP6_ERROR_NONE)
1925 radv_info->keep_sending_rs = 0;
1929 r.sw_if_index = sw_if_index0;
1930 memcpy (r.router_address, &ip0->src_address, 16);
1931 r.current_hop_limit = h0->current_hop_limit;
1932 r.flags = h0->flags;
1933 r.router_lifetime_in_sec =
1934 clib_net_to_host_u16 (h0->router_lifetime_in_sec);
1935 r.neighbor_reachable_time_in_msec =
1936 clib_net_to_host_u32
1937 (h0->neighbor_reachable_time_in_msec);
1938 r.time_in_msec_between_retransmitted_neighbor_solicitations = clib_net_to_host_u32 (h0->time_in_msec_between_retransmitted_neighbor_solicitations);
1941 /* validate advertised information */
1942 if ((h0->current_hop_limit && radv_info->curr_hop_limit)
1943 && (h0->current_hop_limit !=
1944 radv_info->curr_hop_limit))
1946 ip6_neighbor_syslog (vm, LOG_WARNING,
1947 "our AdvCurHopLimit on %U doesn't agree with %U",
1948 format_vnet_sw_if_index_name,
1955 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP)
1956 != radv_info->adv_managed_flag)
1958 ip6_neighbor_syslog (vm, LOG_WARNING,
1959 "our AdvManagedFlag on %U doesn't agree with %U",
1960 format_vnet_sw_if_index_name,
1967 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP)
1968 != radv_info->adv_other_flag)
1970 ip6_neighbor_syslog (vm, LOG_WARNING,
1971 "our AdvOtherConfigFlag on %U doesn't agree with %U",
1972 format_vnet_sw_if_index_name,
1979 time_in_msec_between_retransmitted_neighbor_solicitations
1981 adv_time_in_msec_between_retransmitted_neighbor_solicitations)
1983 time_in_msec_between_retransmitted_neighbor_solicitations
1985 clib_host_to_net_u32 (radv_info->
1986 adv_time_in_msec_between_retransmitted_neighbor_solicitations)))
1988 ip6_neighbor_syslog (vm, LOG_WARNING,
1989 "our AdvRetransTimer on %U doesn't agree with %U",
1990 format_vnet_sw_if_index_name,
1996 if ((h0->neighbor_reachable_time_in_msec &&
1997 radv_info->adv_neighbor_reachable_time_in_msec) &&
1998 (h0->neighbor_reachable_time_in_msec !=
1999 clib_host_to_net_u32
2000 (radv_info->adv_neighbor_reachable_time_in_msec)))
2002 ip6_neighbor_syslog (vm, LOG_WARNING,
2003 "our AdvReachableTime on %U doesn't agree with %U",
2004 format_vnet_sw_if_index_name,
2010 /* check for MTU or prefix options or .. */
2011 u8 *opt_hdr = (u8 *) (h0 + 1);
2012 while (options_len0 > 0)
2014 icmp6_neighbor_discovery_option_header_t *o0 =
2015 (icmp6_neighbor_discovery_option_header_t *)
2017 int opt_len = o0->n_data_u64s << 3;
2018 icmp6_neighbor_discovery_option_type_t option_type =
2021 if (options_len0 < 2)
2023 ip6_neighbor_syslog (vm, LOG_ERR,
2024 "malformed RA packet on %U from %U",
2025 format_vnet_sw_if_index_name,
2034 ip6_neighbor_syslog (vm, LOG_ERR,
2035 " zero length option in RA on %U from %U",
2036 format_vnet_sw_if_index_name,
2042 else if (opt_len > options_len0)
2044 ip6_neighbor_syslog (vm, LOG_ERR,
2045 "option length in RA packet greater than total length on %U from %U",
2046 format_vnet_sw_if_index_name,
2053 options_len0 -= opt_len;
2056 switch (option_type)
2058 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address:
2060 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
2062 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
2065 if (opt_len < sizeof (*h))
2068 memcpy (r.slla, h->ethernet_address, 6);
2072 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu:
2074 icmp6_neighbor_discovery_mtu_option_t *h =
2075 (icmp6_neighbor_discovery_mtu_option_t
2078 if (opt_len < sizeof (*h))
2081 r.mtu = clib_net_to_host_u32 (h->mtu);
2083 if ((h->mtu && radv_info->adv_link_mtu) &&
2085 clib_host_to_net_u32
2086 (radv_info->adv_link_mtu)))
2088 ip6_neighbor_syslog (vm, LOG_WARNING,
2089 "our AdvLinkMTU on %U doesn't agree with %U",
2090 format_vnet_sw_if_index_name,
2098 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information:
2100 icmp6_neighbor_discovery_prefix_information_option_t
2102 (icmp6_neighbor_discovery_prefix_information_option_t
2105 /* validate advertised prefix options */
2106 ip6_radv_prefix_t *pr_info;
2107 u32 preferred, valid;
2109 if (opt_len < sizeof (*h))
2112 vec_validate (r.prefixes,
2113 vec_len (r.prefixes));
2114 ra_report_prefix_info_t *prefix =
2115 vec_elt_at_index (r.prefixes,
2116 vec_len (r.prefixes) - 1);
2119 clib_net_to_host_u32 (h->preferred_time);
2120 valid = clib_net_to_host_u32 (h->valid_time);
2122 prefix->preferred_time = preferred;
2123 prefix->valid_time = valid;
2124 prefix->flags = h->flags & 0xc0;
2125 prefix->dst_address_length =
2126 h->dst_address_length;
2127 prefix->dst_address = h->dst_address;
2129 /* look for matching prefix - if we our advertising it, it better be consistant */
2131 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
2135 ip6_address_mask_from_width(&mask, pr_info->prefix_len);
2137 if(pr_info->enabled &&
2138 (pr_info->prefix_len == h->dst_address_length) &&
2139 ip6_address_is_equal_masked (&pr_info->prefix, &h->dst_address, &mask))
2142 if(!pr_info->decrement_lifetime_flag &&
2143 valid != pr_info->adv_valid_lifetime_in_secs)
2145 ip6_neighbor_syslog(vm, LOG_WARNING,
2146 "our ADV validlifetime on %U for %U does not agree with %U",
2147 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
2148 format_ip6_address, &h->dst_address);
2150 if(!pr_info->decrement_lifetime_flag &&
2151 preferred != pr_info->adv_pref_lifetime_in_secs)
2153 ip6_neighbor_syslog(vm, LOG_WARNING,
2154 "our ADV preferredlifetime on %U for %U does not agree with %U",
2155 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
2156 format_ip6_address, &h->dst_address);
2174 p0->error = error_node->errors[error0];
2176 if (error0 != ICMP6_ERROR_NONE)
2177 vlib_error_count (vm, error_node->node_index, error0, 1);
2179 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2180 to_next, n_left_to_next,
2184 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2187 /* Account for router advertisements received. */
2188 vlib_error_count (vm, error_node->node_index,
2189 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_RX,
2190 n_advertisements_rcvd);
2192 return frame->n_vectors;
2196 random_f64_from_to (f64 from, f64 to)
2198 static u32 seed = 0;
2199 static u8 seed_set = 0;
2202 seed = random_default_seed ();
2205 return random_f64 (&seed) * (to - from) + from;
2209 get_mac_address (u32 sw_if_index, u8 * address)
2211 vnet_main_t *vnm = vnet_get_main ();
2212 vnet_hw_interface_t *hw_if = vnet_get_sup_hw_interface (vnm, sw_if_index);
2213 if (!hw_if->hw_address)
2215 clib_memcpy (address, hw_if->hw_address, 6);
2219 static inline vlib_buffer_t *
2220 create_buffer_for_rs (vlib_main_t * vm, ip6_radv_t * radv_info)
2224 vlib_buffer_free_list_t *fl;
2225 icmp6_router_solicitation_header_t *rh;
2230 sw_if_index = radv_info->sw_if_index;
2232 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
2234 clib_warning ("buffer allocation failure");
2238 p0 = vlib_get_buffer (vm, bi0);
2239 fl = vlib_buffer_get_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2240 vlib_buffer_init_for_free_list (p0, fl);
2241 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (p0);
2242 p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
2244 vnet_buffer (p0)->sw_if_index[VLIB_RX] = sw_if_index;
2245 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index;
2247 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
2249 rh = vlib_buffer_get_current (p0);
2250 p0->current_length = sizeof (*rh);
2252 rh->neighbor.icmp.type = ICMP6_router_solicitation;
2253 rh->neighbor.icmp.code = 0;
2254 rh->neighbor.icmp.checksum = 0;
2255 rh->neighbor.reserved_must_be_zero = 0;
2257 rh->link_layer_option.header.type =
2258 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2259 if (0 != get_mac_address (sw_if_index,
2260 rh->link_layer_option.ethernet_address))
2262 clib_warning ("interface with sw_if_index %u has no mac address",
2264 vlib_buffer_free (vm, &bi0, 1);
2267 rh->link_layer_option.header.n_data_u64s = 1;
2269 payload_length = sizeof (rh->neighbor) + sizeof (u64);
2271 rh->ip.ip_version_traffic_class_and_flow_label =
2272 clib_host_to_net_u32 (0x6 << 28);
2273 rh->ip.payload_length = clib_host_to_net_u16 (payload_length);
2274 rh->ip.protocol = IP_PROTOCOL_ICMP6;
2275 rh->ip.hop_limit = 255;
2276 rh->ip.src_address = radv_info->link_local_address;
2277 /* set address ff02::2 */
2278 rh->ip.dst_address.as_u64[0] = clib_host_to_net_u64 (0xff02L << 48);
2279 rh->ip.dst_address.as_u64[1] = clib_host_to_net_u64 (2);
2281 rh->neighbor.icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, p0,
2289 stop_sending_rs (vlib_main_t * vm, ip6_radv_t * ra)
2293 ra->keep_sending_rs = 0;
2296 bi0 = vlib_get_buffer_index (vm, ra->buffer);
2297 vlib_buffer_free (vm, &bi0, 1);
2303 check_send_rs (vlib_main_t * vm, ip6_radv_t * radv_info, f64 current_time,
2313 icmp6_send_router_solicitation_params_t *params;
2315 if (!radv_info->keep_sending_rs)
2318 params = &radv_info->params;
2320 if (radv_info->due_time > current_time)
2322 *due_time = radv_info->due_time;
2326 p0 = radv_info->buffer;
2328 next_index = ip6_rewrite_mcast_node.index;
2330 c0 = vlib_buffer_copy (vm, p0);
2331 ci0 = vlib_get_buffer_index (vm, c0);
2333 f = vlib_get_frame_to_node (vm, next_index);
2334 to_next = vlib_frame_vector_args (f);
2337 vlib_put_frame_to_node (vm, next_index, f);
2339 if (params->mrc != 0 && --radv_info->n_left == 0)
2340 stop_sending_rs (vm, radv_info);
2343 radv_info->sleep_interval =
2344 (2 + random_f64_from_to (-0.1, 0.1)) * radv_info->sleep_interval;
2345 if (radv_info->sleep_interval > params->mrt)
2346 radv_info->sleep_interval =
2347 (1 + random_f64_from_to (-0.1, 0.1)) * params->mrt;
2349 radv_info->due_time = current_time + radv_info->sleep_interval;
2351 if (params->mrd != 0
2352 && current_time > radv_info->start_time + params->mrd)
2353 stop_sending_rs (vm, radv_info);
2355 *due_time = radv_info->due_time;
2358 return radv_info->keep_sending_rs;
2362 send_rs_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
2365 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2366 ip6_radv_t *radv_info;
2367 uword *event_data = 0;
2368 f64 sleep_time = 1e9;
2375 vlib_process_wait_for_event_or_clock (vm, sleep_time);
2376 vlib_process_get_events (vm, &event_data);
2377 vec_reset_length (event_data);
2379 current_time = vlib_time_now (vm);
2382 due_time = current_time + 1e9;
2384 pool_foreach (radv_info, nm->if_radv_pool,
2386 if (check_send_rs (vm, radv_info, current_time, &dt)
2391 current_time = vlib_time_now (vm);
2393 while (due_time < current_time);
2395 sleep_time = due_time - current_time;
2402 VLIB_REGISTER_NODE (send_rs_process_node) = {
2403 .function = send_rs_process,
2404 .type = VLIB_NODE_TYPE_PROCESS,
2405 .name = "send-rs-process",
2410 icmp6_send_router_solicitation (vlib_main_t * vm, u32 sw_if_index, u8 stop,
2411 icmp6_send_router_solicitation_params_t *
2414 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2418 ASSERT (~0 != sw_if_index);
2420 rai = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2421 ra = pool_elt_at_index (nm->if_radv_pool, rai);
2424 stop_sending_rs (vm, ra);
2427 ra->keep_sending_rs = 1;
2428 ra->params = *params;
2429 ra->n_left = params->mrc;
2430 ra->start_time = vlib_time_now (vm);
2431 ra->sleep_interval = (1 + random_f64_from_to (-0.1, 0.1)) * params->irt;
2432 ra->due_time = 0; /* send first packet ASAP */
2433 ra->buffer = create_buffer_for_rs (vm, ra);
2435 ra->keep_sending_rs = 0;
2437 vlib_process_signal_event (vm, send_rs_process_node.index, 1, 0);
2442 * @brief Add a multicast Address to the advertised MLD set
2445 ip6_neighbor_add_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2447 ip6_mldp_group_t *mcast_group_info;
2450 /* lookup mldp info for this interface */
2451 p = mhash_get (&radv_info->address_to_mldp_index, addr);
2453 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2456 if (!mcast_group_info)
2460 pool_get (radv_info->mldp_group_pool, mcast_group_info);
2462 mi = mcast_group_info - radv_info->mldp_group_pool;
2463 mhash_set (&radv_info->address_to_mldp_index, addr, mi, /* old_value */
2466 mcast_group_info->type = 4;
2467 mcast_group_info->mcast_source_address_pool = 0;
2468 mcast_group_info->num_sources = 0;
2469 clib_memcpy (&mcast_group_info->mcast_address, addr,
2470 sizeof (ip6_address_t));
2475 * @brief Delete a multicast Address from the advertised MLD set
2478 ip6_neighbor_del_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2480 ip6_mldp_group_t *mcast_group_info;
2483 p = mhash_get (&radv_info->address_to_mldp_index, &addr);
2485 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2487 if (mcast_group_info)
2489 mhash_unset (&radv_info->address_to_mldp_index, &addr,
2491 pool_put (radv_info->mldp_group_pool, mcast_group_info);
2496 * @brief Add a multicast Address to the advertised MLD set
2499 ip6_neighbor_add_mld_grp (ip6_radv_t * a,
2500 ip6_multicast_address_scope_t scope,
2501 ip6_multicast_link_local_group_id_t group)
2505 ip6_set_reserved_multicast_address (&addr, scope, group);
2507 ip6_neighbor_add_mld_prefix (a, &addr);
2511 * @brief create and initialize router advertisement parameters with default
2512 * values for this intfc
2515 ip6_neighbor_sw_interface_add_del (vnet_main_t * vnm,
2516 u32 sw_if_index, u32 is_add)
2518 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2521 vnet_sw_interface_t *sw_if0;
2522 ethernet_interface_t *eth_if0 = 0;
2524 /* lookup radv container - ethernet interfaces only */
2525 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2526 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2527 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2532 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2534 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2538 a = pool_elt_at_index (nm->if_radv_pool, ri);
2542 ip6_radv_prefix_t *p;
2543 ip6_mldp_group_t *m;
2545 /* release the lock on the interface's mcast adj */
2546 adj_unlock (a->mcast_adj_index);
2548 /* clean up prefix and MDP pools */
2550 pool_flush(p, a->adv_prefixes_pool,
2552 mhash_unset (&a->address_to_prefix_index, &p->prefix, 0);
2554 pool_flush (m, a->mldp_group_pool,
2556 mhash_unset (&a->address_to_mldp_index, &m->mcast_address, 0);
2560 pool_free (a->mldp_group_pool);
2561 pool_free (a->adv_prefixes_pool);
2563 mhash_free (&a->address_to_prefix_index);
2564 mhash_free (&a->address_to_mldp_index);
2566 if (a->keep_sending_rs)
2567 a->keep_sending_rs = 0;
2569 pool_put (nm->if_radv_pool, a);
2570 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ~0;
2578 vnet_hw_interface_t *hw_if0;
2580 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index);
2582 pool_get (nm->if_radv_pool, a);
2584 ri = a - nm->if_radv_pool;
2585 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ri;
2587 /* initialize default values (most of which are zero) */
2588 memset (a, 0, sizeof (a[0]));
2590 a->sw_if_index = sw_if_index;
2591 a->max_radv_interval = DEF_MAX_RADV_INTERVAL;
2592 a->min_radv_interval = DEF_MIN_RADV_INTERVAL;
2593 a->curr_hop_limit = DEF_CURR_HOP_LIMIT;
2594 a->adv_router_lifetime_in_sec = DEF_DEF_RTR_LIFETIME;
2596 /* send ll address source address option */
2597 a->adv_link_layer_address = 1;
2599 a->min_delay_between_radv = MIN_DELAY_BETWEEN_RAS;
2600 a->max_delay_between_radv = MAX_DELAY_BETWEEN_RAS;
2601 a->max_rtr_default_lifetime = MAX_DEF_RTR_LIFETIME;
2602 a->seed = (u32) clib_cpu_time_now ();
2603 (void) random_u32 (&a->seed);
2604 a->randomizer = clib_cpu_time_now ();
2605 (void) random_u64 (&a->randomizer);
2607 a->initial_adverts_count = MAX_INITIAL_RTR_ADVERTISEMENTS;
2608 a->initial_adverts_sent = a->initial_adverts_count - 1;
2609 a->initial_adverts_interval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
2611 /* deafult is to send */
2614 /* fill in radv_info for this interface that will be needed later */
2615 a->adv_link_mtu = hw_if0->max_l3_packet_bytes[VLIB_RX];
2617 clib_memcpy (a->link_layer_address, eth_if0->address, 6);
2619 /* fill in default link-local address (this may be overridden) */
2620 ip6_link_local_address_from_ethernet_address
2621 (&a->link_local_address, eth_if0->address);
2623 mhash_init (&a->address_to_prefix_index, sizeof (uword),
2624 sizeof (ip6_address_t));
2625 mhash_init (&a->address_to_mldp_index, sizeof (uword),
2626 sizeof (ip6_address_t));
2628 a->mcast_adj_index = adj_mcast_add_or_lock (FIB_PROTOCOL_IP6,
2632 a->keep_sending_rs = 0;
2634 /* add multicast groups we will always be reporting */
2635 ip6_neighbor_add_mld_grp (a,
2636 IP6_MULTICAST_SCOPE_link_local,
2637 IP6_MULTICAST_GROUP_ID_all_hosts);
2638 ip6_neighbor_add_mld_grp (a,
2639 IP6_MULTICAST_SCOPE_link_local,
2640 IP6_MULTICAST_GROUP_ID_all_routers);
2641 ip6_neighbor_add_mld_grp (a,
2642 IP6_MULTICAST_SCOPE_link_local,
2643 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2649 /* send an mldpv2 report */
2651 ip6_neighbor_send_mldpv2_report (u32 sw_if_index)
2653 vnet_main_t *vnm = vnet_get_main ();
2654 vlib_main_t *vm = vnm->vlib_main;
2655 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2656 vnet_sw_interface_t *sw_if0;
2657 ethernet_interface_t *eth_if0;
2661 ip6_radv_t *radv_info;
2671 icmp6_multicast_listener_report_header_t *rh0;
2672 icmp6_multicast_listener_report_packet_t *rp0;
2674 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2675 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
2676 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2678 if (!eth_if0 || !vnet_sw_interface_is_admin_up (vnm, sw_if_index))
2681 /* look up the radv_t information for this interface */
2682 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2685 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2690 /* send report now - build a mldpv2 report packet */
2691 n_allocated = vlib_buffer_alloc_from_free_list (vm,
2694 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2695 if (PREDICT_FALSE (n_allocated == 0))
2697 clib_warning ("buffer allocation failure");
2701 b0 = vlib_get_buffer (vm, bo0);
2703 /* adjust the sizeof the buffer to just include the ipv6 header */
2704 b0->current_length = sizeof (icmp6_multicast_listener_report_packet_t);
2706 payload_length = sizeof (icmp6_multicast_listener_report_header_t);
2708 b0->error = ICMP6_ERROR_NONE;
2710 rp0 = vlib_buffer_get_current (b0);
2711 ip0 = (ip6_header_t *) & rp0->ip;
2712 rh0 = (icmp6_multicast_listener_report_header_t *) & rp0->report_hdr;
2714 memset (rp0, 0x0, sizeof (icmp6_multicast_listener_report_packet_t));
2716 ip0->ip_version_traffic_class_and_flow_label =
2717 clib_host_to_net_u32 (0x6 << 28);
2719 ip0->protocol = IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS;
2720 /* for DEBUG - vnet driver won't seem to emit router alerts */
2721 /* ip0->protocol = IP_PROTOCOL_ICMP6; */
2724 rh0->icmp.type = ICMP6_multicast_listener_report_v2;
2726 /* source address MUST be the link-local address */
2727 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2728 ip0->src_address = radv_info->link_local_address;
2730 /* destination is all mldpv2 routers */
2731 ip6_set_reserved_multicast_address (&ip0->dst_address,
2732 IP6_MULTICAST_SCOPE_link_local,
2733 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2735 /* add reports here */
2736 ip6_mldp_group_t *m;
2737 int num_addr_records = 0;
2738 icmp6_multicast_address_record_t rr;
2740 /* fill in the hop-by-hop extension header (router alert) info */
2741 rh0->ext_hdr.next_hdr = IP_PROTOCOL_ICMP6;
2742 rh0->ext_hdr.n_data_u64s = 0;
2744 rh0->alert.type = IP6_MLDP_ALERT_TYPE;
2746 rh0->alert.value = 0;
2751 rh0->icmp.checksum = 0;
2754 pool_foreach (m, radv_info->mldp_group_pool,
2757 rr.aux_data_len_u32s = 0;
2758 rr.num_sources = clib_host_to_net_u16 (m->num_sources);
2759 clib_memcpy(&rr.mcast_addr, &m->mcast_address, sizeof(ip6_address_t));
2763 vlib_buffer_add_data
2764 (vm, vlib_buffer_get_free_list_index (b0), bo0,
2765 (void *)&rr, sizeof(icmp6_multicast_address_record_t));
2767 payload_length += sizeof( icmp6_multicast_address_record_t);
2772 rh0->num_addr_records = clib_host_to_net_u16 (num_addr_records);
2774 /* update lengths */
2775 ip0->payload_length = clib_host_to_net_u16 (payload_length);
2777 rh0->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0,
2779 ASSERT (bogus_length == 0);
2782 * OK to override w/ no regard for actual FIB, because
2783 * ip6-rewrite only looks at the adjacency.
2785 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
2786 vnet_main.local_interface_sw_if_index;
2788 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
2789 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
2791 vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite-mcast");
2793 f = vlib_get_frame_to_node (vm, node->index);
2794 to_next = vlib_frame_vector_args (f);
2798 vlib_put_frame_to_node (vm, node->index, f);
2803 VLIB_REGISTER_NODE (ip6_icmp_router_solicitation_node,static) =
2805 .function = icmp6_router_solicitation,
2806 .name = "icmp6-router-solicitation",
2808 .vector_size = sizeof (u32),
2810 .format_trace = format_icmp6_input_trace,
2812 .n_next_nodes = ICMP6_ROUTER_SOLICITATION_N_NEXT,
2814 [ICMP6_ROUTER_SOLICITATION_NEXT_DROP] = "ip6-drop",
2815 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW] = "ip6-rewrite-mcast",
2816 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX] = "interface-output",
2821 /* send a RA or update the timer info etc.. */
2823 ip6_neighbor_process_timer_event (vlib_main_t * vm,
2824 vlib_node_runtime_t * node,
2825 vlib_frame_t * frame)
2827 vnet_main_t *vnm = vnet_get_main ();
2828 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2829 ip6_radv_t *radv_info;
2830 vlib_frame_t *f = 0;
2831 u32 n_this_frame = 0;
2832 u32 n_left_to_next = 0;
2835 icmp6_router_solicitation_header_t *h0;
2837 f64 now = vlib_time_now (vm);
2839 /* Interface ip6 radv info list */
2841 pool_foreach (radv_info, nm->if_radv_pool,
2843 if( !vnet_sw_interface_is_admin_up (vnm, radv_info->sw_if_index))
2845 radv_info->initial_adverts_sent = radv_info->initial_adverts_count-1;
2846 radv_info->next_multicast_time = now;
2847 radv_info->last_multicast_time = now;
2848 radv_info->last_radv_time = 0;
2849 radv_info->all_routers_mcast = 0;
2853 /* Make sure that we've joined the all-routers multicast group */
2854 if(!radv_info->all_routers_mcast)
2856 /* send MDLP_REPORT_EVENT message */
2857 ip6_neighbor_send_mldpv2_report(radv_info->sw_if_index);
2858 radv_info->all_routers_mcast = 1;
2861 /* is it time to send a multicast RA on this interface? */
2862 if(radv_info->send_radv && (now >= radv_info->next_multicast_time))
2867 f64 rfn = (radv_info->max_radv_interval - radv_info->min_radv_interval) *
2868 random_f64 (&radv_info->seed) + radv_info->min_radv_interval;
2870 /* multicast send - compute next multicast send time */
2871 if( radv_info->initial_adverts_sent > 0)
2873 radv_info->initial_adverts_sent--;
2874 if(rfn > radv_info-> initial_adverts_interval)
2875 rfn = radv_info-> initial_adverts_interval;
2877 /* check to see if we are ceasing to send */
2878 if( radv_info->initial_adverts_sent == 0)
2879 if(radv_info->cease_radv)
2880 radv_info->send_radv = 0;
2883 radv_info->next_multicast_time = rfn + now;
2884 radv_info->last_multicast_time = now;
2886 /* send advert now - build a "solicted" router advert with unspecified source address */
2887 n_allocated = vlib_buffer_alloc_from_free_list
2888 (vm, &bo0, n_to_alloc, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2890 if (PREDICT_FALSE(n_allocated == 0))
2892 clib_warning ("buffer allocation failure");
2895 b0 = vlib_get_buffer (vm, bo0);
2896 b0->current_length = sizeof( icmp6_router_solicitation_header_t);
2897 b0->error = ICMP6_ERROR_NONE;
2898 vnet_buffer (b0)->sw_if_index[VLIB_RX] = radv_info->sw_if_index;
2900 h0 = vlib_buffer_get_current (b0);
2902 memset (h0, 0, sizeof (icmp6_router_solicitation_header_t));
2904 h0->ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2905 h0->ip.payload_length = clib_host_to_net_u16 (sizeof (icmp6_router_solicitation_header_t)
2906 - STRUCT_OFFSET_OF (icmp6_router_solicitation_header_t, neighbor));
2907 h0->ip.protocol = IP_PROTOCOL_ICMP6;
2908 h0->ip.hop_limit = 255;
2910 /* set src/dst address as "unspecified" this marks this packet as internally generated rather than recieved */
2911 h0->ip.src_address.as_u64[0] = 0;
2912 h0->ip.src_address.as_u64[1] = 0;
2914 h0->ip.dst_address.as_u64[0] = 0;
2915 h0->ip.dst_address.as_u64[1] = 0;
2917 h0->neighbor.icmp.type = ICMP6_router_solicitation;
2919 if (PREDICT_FALSE(f == 0))
2921 f = vlib_get_frame_to_node (vm, ip6_icmp_router_solicitation_node.index);
2922 to_next = vlib_frame_vector_args (f);
2923 n_left_to_next = VLIB_FRAME_SIZE;
2932 if (PREDICT_FALSE(n_left_to_next == 0))
2934 f->n_vectors = n_this_frame;
2935 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2944 ASSERT (n_this_frame);
2945 f->n_vectors = n_this_frame;
2946 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2952 ip6_icmp_neighbor_discovery_event_process (vlib_main_t * vm,
2953 vlib_node_runtime_t * node,
2954 vlib_frame_t * frame)
2957 ip6_icmp_neighbor_discovery_event_data_t *event_data;
2959 /* init code here */
2963 vlib_process_wait_for_event_or_clock (vm, 1. /* seconds */ );
2965 event_data = vlib_process_get_event_data (vm, &event_type);
2969 /* No events found: timer expired. */
2970 /* process interface list and send RAs as appropriate, update timer info */
2971 ip6_neighbor_process_timer_event (vm, node, frame);
2978 case ICMP6_ND_EVENT_INIT:
2989 _vec_len (event_data) = 0;
2992 return frame->n_vectors;
2996 VLIB_REGISTER_NODE (ip6_icmp_router_advertisement_node,static) =
2998 .function = icmp6_router_advertisement,
2999 .name = "icmp6-router-advertisement",
3001 .vector_size = sizeof (u32),
3003 .format_trace = format_icmp6_input_trace,
3012 vlib_node_registration_t ip6_icmp_neighbor_discovery_event_node = {
3014 .function = ip6_icmp_neighbor_discovery_event_process,
3015 .name = "ip6-icmp-neighbor-discovery-event-process",
3016 .type = VLIB_NODE_TYPE_PROCESS,
3020 icmp6_neighbor_solicitation (vlib_main_t * vm,
3021 vlib_node_runtime_t * node, vlib_frame_t * frame)
3023 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
3024 /* is_solicitation */
3029 icmp6_neighbor_advertisement (vlib_main_t * vm,
3030 vlib_node_runtime_t * node,
3031 vlib_frame_t * frame)
3033 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
3034 /* is_solicitation */
3039 VLIB_REGISTER_NODE (ip6_icmp_neighbor_solicitation_node,static) =
3041 .function = icmp6_neighbor_solicitation,
3042 .name = "icmp6-neighbor-solicitation",
3044 .vector_size = sizeof (u32),
3046 .format_trace = format_icmp6_input_trace,
3048 .n_next_nodes = ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
3050 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP] = "ip6-drop",
3051 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY] = "interface-output",
3057 VLIB_REGISTER_NODE (ip6_icmp_neighbor_advertisement_node,static) =
3059 .function = icmp6_neighbor_advertisement,
3060 .name = "icmp6-neighbor-advertisement",
3062 .vector_size = sizeof (u32),
3064 .format_trace = format_icmp6_input_trace,
3073 /* API support functions */
3075 ip6_neighbor_ra_config (vlib_main_t * vm, u32 sw_if_index,
3076 u8 suppress, u8 managed, u8 other,
3077 u8 ll_option, u8 send_unicast, u8 cease,
3078 u8 use_lifetime, u32 lifetime,
3079 u32 initial_count, u32 initial_interval,
3080 u32 max_interval, u32 min_interval, u8 is_no)
3082 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3086 /* look up the radv_t information for this interface */
3087 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3089 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3090 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
3095 ip6_radv_t *radv_info;
3096 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3098 if ((max_interval != 0) && (min_interval == 0))
3099 min_interval = .75 * max_interval;
3103 0) ? ((is_no) ? DEF_MAX_RADV_INTERVAL : max_interval) :
3104 radv_info->max_radv_interval;
3107 0) ? ((is_no) ? DEF_MIN_RADV_INTERVAL : min_interval) :
3108 radv_info->min_radv_interval;
3111 0) ? ((is_no) ? DEF_DEF_RTR_LIFETIME : lifetime) :
3112 radv_info->adv_router_lifetime_in_sec;
3116 if (lifetime > MAX_DEF_RTR_LIFETIME)
3117 lifetime = MAX_DEF_RTR_LIFETIME;
3119 if (lifetime <= max_interval)
3120 return VNET_API_ERROR_INVALID_VALUE;
3123 if (min_interval != 0)
3125 if ((min_interval > .75 * max_interval) || (min_interval < 3))
3126 return VNET_API_ERROR_INVALID_VALUE;
3129 if ((initial_count > MAX_INITIAL_RTR_ADVERTISEMENTS) ||
3130 (initial_interval > MAX_INITIAL_RTR_ADVERT_INTERVAL))
3131 return VNET_API_ERROR_INVALID_VALUE;
3134 if "flag" is set and is_no is true then restore default value else set value corresponding to "flag"
3135 if "flag" is clear don't change corresponding value
3137 radv_info->send_radv =
3138 (suppress != 0) ? ((is_no != 0) ? 1 : 0) : radv_info->send_radv;
3139 radv_info->adv_managed_flag =
3140 (managed != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_managed_flag;
3141 radv_info->adv_other_flag =
3142 (other != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_other_flag;
3143 radv_info->adv_link_layer_address =
3145 0) ? ((is_no) ? 1 : 0) : radv_info->adv_link_layer_address;
3146 radv_info->send_unicast =
3147 (send_unicast != 0) ? ((is_no) ? 0 : 1) : radv_info->send_unicast;
3148 radv_info->cease_radv =
3149 (cease != 0) ? ((is_no) ? 0 : 1) : radv_info->cease_radv;
3151 radv_info->min_radv_interval = min_interval;
3152 radv_info->max_radv_interval = max_interval;
3153 radv_info->adv_router_lifetime_in_sec = lifetime;
3155 radv_info->initial_adverts_count =
3157 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERTISEMENTS : initial_count) :
3158 radv_info->initial_adverts_count;
3159 radv_info->initial_adverts_interval =
3160 (initial_interval !=
3161 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERT_INTERVAL : initial_interval) :
3162 radv_info->initial_adverts_interval;
3165 if ((cease != 0) && (is_no))
3166 radv_info->send_radv = 1;
3168 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
3169 radv_info->next_multicast_time = vlib_time_now (vm);
3170 radv_info->last_multicast_time = vlib_time_now (vm);
3171 radv_info->last_radv_time = 0;
3177 ip6_neighbor_ra_prefix (vlib_main_t * vm, u32 sw_if_index,
3178 ip6_address_t * prefix_addr, u8 prefix_len,
3179 u8 use_default, u32 val_lifetime, u32 pref_lifetime,
3180 u8 no_advertise, u8 off_link, u8 no_autoconfig,
3181 u8 no_onlink, u8 is_no)
3183 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3188 /* look up the radv_t information for this interface */
3189 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3192 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3194 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
3198 f64 now = vlib_time_now (vm);
3199 ip6_radv_t *radv_info;
3200 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3202 /* prefix info add, delete or update */
3203 ip6_radv_prefix_t *prefix;
3205 /* lookup prefix info for this address on this interface */
3206 uword *p = mhash_get (&radv_info->address_to_prefix_index, prefix_addr);
3208 prefix = p ? pool_elt_at_index (radv_info->adv_prefixes_pool, p[0]) : 0;
3214 return VNET_API_ERROR_INVALID_VALUE; /* invalid prefix */
3216 if (prefix->prefix_len != prefix_len)
3217 return VNET_API_ERROR_INVALID_VALUE_2;
3219 /* FIXME - Should the DP do this or the CP ? */
3220 /* do specific delete processing here before returning */
3221 /* try to remove from routing table */
3223 mhash_unset (&radv_info->address_to_prefix_index, prefix_addr,
3225 pool_put (radv_info->adv_prefixes_pool, prefix);
3227 radv_info->initial_adverts_sent =
3228 radv_info->initial_adverts_count - 1;
3229 radv_info->next_multicast_time = vlib_time_now (vm);
3230 radv_info->last_multicast_time = vlib_time_now (vm);
3231 radv_info->last_radv_time = 0;
3235 /* adding or changing */
3240 pool_get (radv_info->adv_prefixes_pool, prefix);
3241 pi = prefix - radv_info->adv_prefixes_pool;
3242 mhash_set (&radv_info->address_to_prefix_index, prefix_addr, pi,
3245 memset (prefix, 0x0, sizeof (ip6_radv_prefix_t));
3247 prefix->prefix_len = prefix_len;
3248 clib_memcpy (&prefix->prefix, prefix_addr, sizeof (ip6_address_t));
3250 /* initialize default values */
3251 prefix->adv_on_link_flag = 1; /* L bit set */
3252 prefix->adv_autonomous_flag = 1; /* A bit set */
3253 prefix->adv_valid_lifetime_in_secs = DEF_ADV_VALID_LIFETIME;
3254 prefix->adv_pref_lifetime_in_secs = DEF_ADV_PREF_LIFETIME;
3255 prefix->enabled = 1;
3256 prefix->decrement_lifetime_flag = 1;
3257 prefix->deprecated_prefix_flag = 1;
3261 /* FIXME - Should the DP do this or the CP ? */
3262 /* insert prefix into routing table as a connected prefix */
3271 if (prefix->prefix_len != prefix_len)
3272 return VNET_API_ERROR_INVALID_VALUE_2;
3276 /* FIXME - Should the DP do this or the CP ? */
3277 /* remove from routing table if already there */
3281 if ((val_lifetime == ~0) || (pref_lifetime == ~0))
3283 prefix->adv_valid_lifetime_in_secs = ~0;
3284 prefix->adv_pref_lifetime_in_secs = ~0;
3285 prefix->decrement_lifetime_flag = 0;
3289 prefix->adv_valid_lifetime_in_secs = val_lifetime;;
3290 prefix->adv_pref_lifetime_in_secs = pref_lifetime;
3293 /* copy remaining */
3294 prefix->enabled = !(no_advertise != 0);
3295 prefix->adv_on_link_flag = !((off_link != 0) || (no_onlink != 0));
3296 prefix->adv_autonomous_flag = !(no_autoconfig != 0);
3300 /* fill in the expiration times */
3301 prefix->valid_lifetime_expires =
3302 now + prefix->adv_valid_lifetime_in_secs;
3303 prefix->pref_lifetime_expires = now + prefix->adv_pref_lifetime_in_secs;
3305 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
3306 radv_info->next_multicast_time = vlib_time_now (vm);
3307 radv_info->last_multicast_time = vlib_time_now (vm);
3308 radv_info->last_radv_time = 0;
3314 ip6_neighbor_cmd (vlib_main_t * vm, unformat_input_t * main_input,
3315 vlib_cli_command_t * cmd)
3317 vnet_main_t *vnm = vnet_get_main ();
3318 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3319 clib_error_t *error = 0;
3321 u8 suppress = 0, managed = 0, other = 0;
3322 u8 suppress_ll_option = 0, send_unicast = 0, cease = 0;
3323 u8 use_lifetime = 0;
3324 u32 sw_if_index, ra_lifetime = 0, ra_initial_count =
3325 0, ra_initial_interval = 0;
3326 u32 ra_max_interval = 0, ra_min_interval = 0;
3328 unformat_input_t _line_input, *line_input = &_line_input;
3329 vnet_sw_interface_t *sw_if0;
3331 int add_radv_info = 1;
3332 __attribute__ ((unused)) ip6_radv_t *radv_info = 0;
3333 ip6_address_t ip6_addr;
3337 /* Get a line of input. */
3338 if (!unformat_user (main_input, unformat_line_input, line_input))
3341 /* get basic radv info for this interface */
3342 if (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3345 if (unformat_user (line_input,
3346 unformat_vnet_sw_interface, vnm, &sw_if_index))
3349 ethernet_interface_t *eth_if0 = 0;
3351 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
3352 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
3354 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
3359 clib_error_return (0, "Interface must be of ethernet type");
3363 /* look up the radv_t information for this interface */
3364 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3367 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3371 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3375 error = clib_error_return (0, "unknown interface %U'",
3376 format_unformat_error, line_input);
3382 error = clib_error_return (0, "invalid interface name %U'",
3383 format_unformat_error, line_input);
3388 /* get the rest of the command */
3389 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3391 if (unformat (line_input, "no"))
3393 else if (unformat (line_input, "prefix %U/%d",
3394 unformat_ip6_address, &ip6_addr, &addr_len))
3399 else if (unformat (line_input, "ra-managed-config-flag"))
3404 else if (unformat (line_input, "ra-other-config-flag"))
3409 else if (unformat (line_input, "ra-suppress") ||
3410 unformat (line_input, "ra-surpress"))
3415 else if (unformat (line_input, "ra-suppress-link-layer") ||
3416 unformat (line_input, "ra-surpress-link-layer"))
3418 suppress_ll_option = 1;
3421 else if (unformat (line_input, "ra-send-unicast"))
3426 else if (unformat (line_input, "ra-lifetime"))
3428 if (!unformat (line_input, "%d", &ra_lifetime))
3430 error = unformat_parse_error (line_input);
3436 else if (unformat (line_input, "ra-initial"))
3439 (line_input, "%d %d", &ra_initial_count, &ra_initial_interval))
3441 error = unformat_parse_error (line_input);
3446 else if (unformat (line_input, "ra-interval"))
3448 if (!unformat (line_input, "%d", &ra_max_interval))
3450 error = unformat_parse_error (line_input);
3454 if (!unformat (line_input, "%d", &ra_min_interval))
3455 ra_min_interval = 0;
3458 else if (unformat (line_input, "ra-cease"))
3465 error = unformat_parse_error (line_input);
3472 ip6_neighbor_ra_config (vm, sw_if_index,
3473 suppress, managed, other,
3474 suppress_ll_option, send_unicast, cease,
3475 use_lifetime, ra_lifetime,
3476 ra_initial_count, ra_initial_interval,
3477 ra_max_interval, ra_min_interval, is_no);
3481 u32 valid_lifetime_in_secs = 0;
3482 u32 pref_lifetime_in_secs = 0;
3483 u8 use_prefix_default_values = 0;
3484 u8 no_advertise = 0;
3486 u8 no_autoconfig = 0;
3489 /* get the rest of the command */
3490 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3492 if (unformat (line_input, "default"))
3494 use_prefix_default_values = 1;
3497 else if (unformat (line_input, "infinite"))
3499 valid_lifetime_in_secs = ~0;
3500 pref_lifetime_in_secs = ~0;
3503 else if (unformat (line_input, "%d %d", &valid_lifetime_in_secs,
3504 &pref_lifetime_in_secs))
3511 /* get the rest of the command */
3512 while (!use_prefix_default_values &&
3513 unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3515 if (unformat (line_input, "no-advertise"))
3517 else if (unformat (line_input, "off-link"))
3519 else if (unformat (line_input, "no-autoconfig"))
3521 else if (unformat (line_input, "no-onlink"))
3525 error = unformat_parse_error (line_input);
3530 ip6_neighbor_ra_prefix (vm, sw_if_index,
3531 &ip6_addr, addr_len,
3532 use_prefix_default_values,
3533 valid_lifetime_in_secs,
3534 pref_lifetime_in_secs,
3536 off_link, no_autoconfig, no_onlink, is_no);
3540 unformat_free (line_input);
3546 ip6_print_addrs (vlib_main_t * vm, u32 * addrs)
3548 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3551 for (i = 0; i < vec_len (addrs); i++)
3553 ip_interface_address_t *a =
3554 pool_elt_at_index (lm->if_address_pool, addrs[i]);
3555 ip6_address_t *address = ip_interface_address_get_address (lm, a);
3557 vlib_cli_output (vm, "\t\t%U/%d",
3558 format_ip6_address, address, a->address_length);
3562 static clib_error_t *
3563 show_ip6_interface_cmd (vlib_main_t * vm,
3564 unformat_input_t * input, vlib_cli_command_t * cmd)
3566 vnet_main_t *vnm = vnet_get_main ();
3567 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3568 clib_error_t *error = 0;
3573 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3577 /* look up the radv_t information for this interface */
3578 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3581 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3585 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3586 ip6_radv_t *radv_info;
3587 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3589 vlib_cli_output (vm, "%U is admin %s\n",
3590 format_vnet_sw_interface_name, vnm,
3591 vnet_get_sw_interface (vnm, sw_if_index),
3592 (vnet_sw_interface_is_admin_up (vnm, sw_if_index) ?
3596 u32 *link_scope = 0, *global_scope = 0;
3597 u32 *local_scope = 0, *unknown_scope = 0;
3598 ip_interface_address_t *a;
3600 vec_validate_init_empty (lm->if_address_pool_index_by_sw_if_index,
3602 ai = lm->if_address_pool_index_by_sw_if_index[sw_if_index];
3604 while (ai != (u32) ~ 0)
3606 a = pool_elt_at_index (lm->if_address_pool, ai);
3607 ip6_address_t *address =
3608 ip_interface_address_get_address (lm, a);
3610 if (ip6_address_is_link_local_unicast (address))
3611 vec_add1 (link_scope, ai);
3612 else if (ip6_address_is_global_unicast (address))
3613 vec_add1 (global_scope, ai);
3614 else if (ip6_address_is_local_unicast (address))
3615 vec_add1 (local_scope, ai);
3617 vec_add1 (unknown_scope, ai);
3619 ai = a->next_this_sw_interface;
3622 if (vec_len (link_scope))
3624 vlib_cli_output (vm, "\tLink-local address(es):\n");
3625 ip6_print_addrs (vm, link_scope);
3626 vec_free (link_scope);
3629 if (vec_len (local_scope))
3631 vlib_cli_output (vm, "\tLocal unicast address(es):\n");
3632 ip6_print_addrs (vm, local_scope);
3633 vec_free (local_scope);
3636 if (vec_len (global_scope))
3638 vlib_cli_output (vm, "\tGlobal unicast address(es):\n");
3639 ip6_print_addrs (vm, global_scope);
3640 vec_free (global_scope);
3643 if (vec_len (unknown_scope))
3645 vlib_cli_output (vm, "\tOther-scope address(es):\n");
3646 ip6_print_addrs (vm, unknown_scope);
3647 vec_free (unknown_scope);
3650 vlib_cli_output (vm, "\tLink-local address(es):\n");
3651 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
3652 &radv_info->link_local_address);
3654 vlib_cli_output (vm, "\tJoined group address(es):\n");
3655 ip6_mldp_group_t *m;
3657 pool_foreach (m, radv_info->mldp_group_pool,
3659 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
3664 vlib_cli_output (vm, "\tAdvertised Prefixes:\n");
3665 ip6_radv_prefix_t *p;
3667 pool_foreach (p, radv_info->adv_prefixes_pool,
3669 vlib_cli_output (vm, "\t\tprefix %U, length %d\n",
3670 format_ip6_address, &p->prefix, p->prefix_len);
3674 vlib_cli_output (vm, "\tMTU is %d\n", radv_info->adv_link_mtu);
3675 vlib_cli_output (vm, "\tICMP error messages are unlimited\n");
3676 vlib_cli_output (vm, "\tICMP redirects are disabled\n");
3677 vlib_cli_output (vm, "\tICMP unreachables are not sent\n");
3678 vlib_cli_output (vm, "\tND DAD is disabled\n");
3679 //vlib_cli_output (vm, "\tND reachable time is %d milliseconds\n",);
3680 vlib_cli_output (vm, "\tND advertised reachable time is %d\n",
3681 radv_info->adv_neighbor_reachable_time_in_msec);
3682 vlib_cli_output (vm,
3683 "\tND advertised retransmit interval is %d (msec)\n",
3685 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
3687 u32 ra_interval = radv_info->max_radv_interval;
3688 u32 ra_interval_min = radv_info->min_radv_interval;
3689 vlib_cli_output (vm,
3690 "\tND router advertisements are sent every %d seconds (min interval is %d)\n",
3691 ra_interval, ra_interval_min);
3692 vlib_cli_output (vm,
3693 "\tND router advertisements live for %d seconds\n",
3694 radv_info->adv_router_lifetime_in_sec);
3695 vlib_cli_output (vm,
3696 "\tHosts %s stateless autoconfig for addresses\n",
3697 (radv_info->adv_managed_flag) ? "use" :
3699 vlib_cli_output (vm, "\tND router advertisements sent %d\n",
3700 radv_info->n_advertisements_sent);
3701 vlib_cli_output (vm, "\tND router solicitations received %d\n",
3702 radv_info->n_solicitations_rcvd);
3703 vlib_cli_output (vm, "\tND router solicitations dropped %d\n",
3704 radv_info->n_solicitations_dropped);
3708 error = clib_error_return (0, "IPv6 not enabled on interface",
3709 format_unformat_error, input);
3717 * This command is used to display various IPv6 attributes on a given
3721 * Example of how to display IPv6 settings:
3722 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
3723 * GigabitEthernet2/0/0 is admin up
3724 * Link-local address(es):
3726 * Joined group address(es):
3731 * Advertised Prefixes:
3732 * prefix fe80::fe:28ff:fe9c:75b3, length 64
3734 * ICMP error messages are unlimited
3735 * ICMP redirects are disabled
3736 * ICMP unreachables are not sent
3737 * ND DAD is disabled
3738 * ND advertised reachable time is 0
3739 * ND advertised retransmit interval is 0 (msec)
3740 * ND router advertisements are sent every 200 seconds (min interval is 150)
3741 * ND router advertisements live for 600 seconds
3742 * Hosts use stateless autoconfig for addresses
3743 * ND router advertisements sent 19336
3744 * ND router solicitations received 0
3745 * ND router solicitations dropped 0
3747 * Example of output if IPv6 is not enabled on the interface:
3748 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
3749 * show ip6 interface: IPv6 not enabled on interface
3753 VLIB_CLI_COMMAND (show_ip6_interface_command, static) =
3755 .path = "show ip6 interface",
3756 .function = show_ip6_interface_cmd,
3757 .short_help = "show ip6 interface <interface>",
3762 disable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
3764 clib_error_t *error = 0;
3765 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3768 /* look up the radv_t information for this interface */
3769 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3771 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3773 /* if not created - do nothing */
3776 ip6_radv_t *radv_info;
3778 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3780 /* check radv_info ref count for other ip6 addresses on this interface */
3781 /* This implicitly excludes the link local address */
3782 if (radv_info->ref_count == 0)
3784 /* essentially "disables" ipv6 on this interface */
3785 ip6_ll_prefix_t ilp = {
3786 .ilp_addr = radv_info->link_local_address,
3787 .ilp_sw_if_index = sw_if_index,
3789 ip6_ll_table_entry_delete (&ilp);
3790 ip6_sw_interface_enable_disable (sw_if_index, 0);
3791 ip6_mfib_interface_enable_disable (sw_if_index, 0);
3792 ip6_neighbor_sw_interface_add_del (vnet_get_main (), sw_if_index,
3800 ip6_interface_enabled (vlib_main_t * vm, u32 sw_if_index)
3802 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3805 /* look up the radv_t information for this interface */
3806 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3809 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3815 enable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
3817 clib_error_t *error = 0;
3818 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3822 /* look up the radv_t information for this interface */
3823 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3826 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3828 /* if not created yet */
3831 vnet_main_t *vnm = vnet_get_main ();
3832 vnet_sw_interface_t *sw_if0;
3834 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
3835 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
3837 ethernet_interface_t *eth_if0;
3840 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
3843 /* create radv_info. for this interface. This holds all the info needed for router adverts */
3845 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, is_add);
3849 ip6_radv_t *radv_info;
3850 ip6_address_t link_local_address;
3852 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3854 ip6_link_local_address_from_ethernet_mac_address
3855 (&link_local_address, eth_if0->address);
3857 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index);
3858 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_SUB ||
3859 sw_if0->type == VNET_SW_INTERFACE_TYPE_P2P)
3861 /* make up an interface id */
3862 link_local_address.as_u64[1] =
3863 random_u64 (&radv_info->randomizer);
3865 link_local_address.as_u64[0] =
3866 clib_host_to_net_u64 (0xFE80000000000000ULL);
3868 link_local_address.as_u8[8] &= 0xfd;
3871 ip6_ll_prefix_t ilp = {
3872 .ilp_addr = link_local_address,
3873 .ilp_sw_if_index = sw_if_index,
3876 ip6_ll_table_entry_update (&ilp, FIB_ROUTE_PATH_LOCAL);
3879 /* essentially "enables" ipv6 on this interface */
3880 ip6_mfib_interface_enable_disable (sw_if_index, 1);
3881 ip6_sw_interface_enable_disable (sw_if_index, 1);
3885 radv_info->link_local_address = link_local_address;
3895 ip6_get_ll_address (u32 sw_if_index, ip6_address_t * addr)
3897 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3898 ip6_radv_t *radv_info;
3901 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) < sw_if_index)
3904 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3909 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3910 *addr = radv_info->link_local_address;
3915 static clib_error_t *
3916 enable_ip6_interface_cmd (vlib_main_t * vm,
3917 unformat_input_t * input, vlib_cli_command_t * cmd)
3919 vnet_main_t *vnm = vnet_get_main ();
3920 clib_error_t *error = 0;
3925 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3927 enable_ip6_interface (vm, sw_if_index);
3931 error = clib_error_return (0, "unknown interface\n'",
3932 format_unformat_error, input);
3939 * This command is used to enable IPv6 on a given interface.
3942 * Example of how enable IPv6 on a given interface:
3943 * @cliexcmd{enable ip6 interface GigabitEthernet2/0/0}
3946 VLIB_CLI_COMMAND (enable_ip6_interface_command, static) =
3948 .path = "enable ip6 interface",
3949 .function = enable_ip6_interface_cmd,
3950 .short_help = "enable ip6 interface <interface>",
3954 static clib_error_t *
3955 disable_ip6_interface_cmd (vlib_main_t * vm,
3956 unformat_input_t * input, vlib_cli_command_t * cmd)
3958 vnet_main_t *vnm = vnet_get_main ();
3959 clib_error_t *error = 0;
3964 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3966 error = disable_ip6_interface (vm, sw_if_index);
3970 error = clib_error_return (0, "unknown interface\n'",
3971 format_unformat_error, input);
3978 * This command is used to disable IPv6 on a given interface.
3981 * Example of how disable IPv6 on a given interface:
3982 * @cliexcmd{disable ip6 interface GigabitEthernet2/0/0}
3985 VLIB_CLI_COMMAND (disable_ip6_interface_command, static) =
3987 .path = "disable ip6 interface",
3988 .function = disable_ip6_interface_cmd,
3989 .short_help = "disable ip6 interface <interface>",
3994 * This command is used to configure the neighbor discovery
3995 * parameters on a given interface. Use the '<em>show ip6 interface</em>'
3996 * command to display some of the current neighbor discovery parameters
3997 * on a given interface. This command has three formats:
4000 * <b>Format 1 - Router Advertisement Options:</b> (Only one can be entered in a single command)
4002 * '<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>'
4006 * <em>[no] ra-managed-config-flag</em> - Advertises in ICMPv6
4007 * router-advertisement messages to use stateful address
4008 * auto-configuration to obtain address information (sets the M-bit).
4009 * Default is the M-bit is not set and the '<em>no</em>' option
4010 * returns it to this default state.
4012 * <em>[no] ra-other-config-flag</em> - Indicates in ICMPv6
4013 * router-advertisement messages that hosts use stateful auto
4014 * configuration to obtain nonaddress related information (sets
4015 * the O-bit). Default is the O-bit is not set and the '<em>no</em>'
4016 * option returns it to this default state.
4018 * <em>[no] ra-suppress</em> - Disables sending ICMPv6 router-advertisement
4019 * messages. The '<em>no</em>' option implies to enable sending ICMPv6
4020 * router-advertisement messages.
4022 * <em>[no] ra-suppress-link-layer</em> - Indicates not to include the
4023 * optional source link-layer address in the ICMPv6 router-advertisement
4024 * messages. Default is to include the optional source link-layer address
4025 * and the '<em>no</em>' option returns it to this default state.
4027 * <em>[no] ra-send-unicast</em> - Use the source address of the
4028 * router-solicitation message if availiable. The default is to use
4029 * multicast address of all nodes, and the '<em>no</em>' option returns
4030 * it to this default state.
4032 * <em>[no] ra-lifetime <lifetime></em> - Advertises the lifetime of a
4033 * default router in ICMPv6 router-advertisement messages. The range is
4034 * from 0 to 9000 seconds. '<em><lifetime></em>' must be greater than
4035 * '<em><max-interval></em>'. The default value is 600 seconds and the
4036 * '<em>no</em>' option returns it to this default value.
4038 * <em>[no] ra-initial <cnt> <interval></em> - Number of initial ICMPv6
4039 * router-advertisement messages sent and the interval between each
4040 * message. Range for count is 1 - 3 and default is 3. Range for interval
4041 * is 1 to 16 seconds, and default is 16 seconds. The '<em>no</em>' option
4042 * returns both to their default value.
4044 * <em>[no] ra-interval <max-interval> [<min-interval>]</em> - Configures the
4045 * interval between sending ICMPv6 router-advertisement messages. The
4046 * range for max-interval is from 4 to 200 seconds. min-interval can not
4047 * be more than 75% of max-interval. If not set, min-interval will be
4048 * set to 75% of max-interval. The range for min-interval is from 3 to
4049 * 150 seconds. The '<em>no</em>' option returns both to their default
4052 * <em>[no] ra-cease</em> - Cease sending ICMPv6 router-advertisement messages.
4053 * The '<em>no</em>' options implies to start (or restart) sending
4054 * ICMPv6 router-advertisement messages.
4057 * <b>Format 2 - Prefix Options:</b>
4059 * '<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>'
4063 * <em>no</em> - All additional flags are ignored and the prefix is deleted.
4065 * <em><valid-lifetime> <pref-lifetime></em> - '<em><valid-lifetime></em>' is the
4066 * length of time in seconds during what the prefix is valid for the purpose of
4067 * on-link determination. Range is 7203 to 2592000 seconds and default is 2592000
4068 * seconds (30 days). '<em><pref-lifetime></em>' is the prefered-lifetime and is the
4069 * length of time in seconds during what addresses generated from the prefix remain
4070 * preferred. Range is 0 to 604800 seconds and default is 604800 seconds (7 days).
4072 * <em>infinite</em> - Both '<em><valid-lifetime></em>' and '<em><<pref-lifetime></em>'
4073 * are inifinte, no timeout.
4075 * <em>no-advertise</em> - Do not send full router address in prefix
4076 * advertisement. Default is to advertise (i.e. - This flag is off by default).
4078 * <em>off-link</em> - Prefix is off-link, clear L-bit in packet. Default is on-link
4079 * (i.e. - This flag is off and L-bit in packet is set by default and this prefix can
4080 * be used for on-link determination). '<em>no-onlink</em>' also controls the L-bit.
4082 * <em>no-autoconfig</em> - Do not use prefix for autoconfiguration, clear A-bit in packet.
4083 * Default is autoconfig (i.e. - This flag is off and A-bit in packet is set by default.
4085 * <em>no-onlink</em> - Do not use prefix for onlink determination, clear L-bit in packet.
4086 * Default is on-link (i.e. - This flag is off and L-bit in packet is set by default and
4087 * this prefix can be used for on-link determination). '<em>off-link</em>' also controls
4091 * <b>Format 3: - Default of Prefix:</b>
4093 * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> default</b></em>'
4095 * When a new prefix is added (or existing one is being overwritten) <em>default</em>
4096 * uses default values for the prefix. If <em>no</em> is used, the <em>default</em>
4097 * is ignored and the prefix is deleted.
4101 * Example of how set a router advertisement option:
4102 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 ra-interval 100 20}
4103 * Example of how to add a prefix:
4104 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 prefix fe80::fe:28ff:fe9c:75b3/64 infinite no-advertise}
4105 * Example of how to delete a prefix:
4106 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 no prefix fe80::fe:28ff:fe9c:75b3/64}
4109 VLIB_CLI_COMMAND (ip6_nd_command, static) =
4112 .short_help = "ip6 nd <interface> ...",
4113 .function = ip6_neighbor_cmd,
4118 set_ip6_link_local_address (vlib_main_t * vm,
4119 u32 sw_if_index, ip6_address_t * address)
4121 clib_error_t *error = 0;
4122 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4124 ip6_radv_t *radv_info;
4125 vnet_main_t *vnm = vnet_get_main ();
4127 if (!ip6_address_is_link_local_unicast (address))
4129 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_LINK_LOCAL;
4130 return (error = clib_error_return (0, "address not link-local",
4131 format_unformat_error));
4134 /* call enable ipv6 */
4135 enable_ip6_interface (vm, sw_if_index);
4137 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4141 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4143 /* save if link local address (overwrite default) */
4145 /* delete the old one */
4146 error = ip6_add_del_interface_address (vm, sw_if_index,
4147 &radv_info->link_local_address,
4148 128, 1 /* is_del */ );
4152 /* add the new one */
4153 error = ip6_add_del_interface_address (vm, sw_if_index,
4159 radv_info->link_local_address = *address;
4165 vnm->api_errno = VNET_API_ERROR_IP6_NOT_ENABLED;
4166 error = clib_error_return (0, "ip6 not enabled for interface",
4167 format_unformat_error);
4173 set_ip6_link_local_address_cmd (vlib_main_t * vm,
4174 unformat_input_t * input,
4175 vlib_cli_command_t * cmd)
4177 vnet_main_t *vnm = vnet_get_main ();
4178 clib_error_t *error = 0;
4180 ip6_address_t ip6_addr;
4182 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4184 /* get the rest of the command */
4185 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
4187 if (unformat (input, "%U", unformat_ip6_address, &ip6_addr))
4190 return (unformat_parse_error (input));
4193 error = set_ip6_link_local_address (vm, sw_if_index, &ip6_addr);
4198 * This command is used to assign an IPv6 Link-local address to an
4199 * interface. This command will enable IPv6 on an interface if it
4200 * is not already enabled. Use the '<em>show ip6 interface</em>' command
4201 * to display the assigned Link-local address.
4204 * Example of how to assign an IPv6 Link-local address to an interface:
4205 * @cliexcmd{set ip6 link-local address GigabitEthernet2/0/0 FE80::AB8}
4208 VLIB_CLI_COMMAND (set_ip6_link_local_address_command, static) =
4210 .path = "set ip6 link-local address",
4211 .short_help = "set ip6 link-local address <interface> <ip6-address>",
4212 .function = set_ip6_link_local_address_cmd,
4217 * @brief callback when an interface address is added or deleted
4220 ip6_neighbor_add_del_interface_address (ip6_main_t * im,
4223 ip6_address_t * address,
4225 u32 if_address_index, u32 is_delete)
4227 vnet_main_t *vnm = vnet_get_main ();
4228 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4230 vlib_main_t *vm = vnm->vlib_main;
4231 ip6_radv_t *radv_info;
4234 /* create solicited node multicast address for this interface adddress */
4235 ip6_set_solicited_node_multicast_address (&a, 0);
4237 a.as_u8[0xd] = address->as_u8[0xd];
4238 a.as_u8[0xe] = address->as_u8[0xe];
4239 a.as_u8[0xf] = address->as_u8[0xf];
4243 /* try to create radv_info - does nothing if ipv6 already enabled */
4244 enable_ip6_interface (vm, sw_if_index);
4246 /* look up the radv_t information for this interface */
4247 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
4249 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4253 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4256 if (!ip6_address_is_link_local_unicast (address))
4257 radv_info->ref_count++;
4259 ip6_neighbor_add_mld_prefix (radv_info, &a);
4266 /* look up the radv_t information for this interface */
4267 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
4269 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4274 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4276 ip6_neighbor_del_mld_prefix (radv_info, &a);
4278 /* if interface up send MLDP "report" */
4279 radv_info->all_routers_mcast = 0;
4282 if (!ip6_address_is_link_local_unicast (address))
4283 radv_info->ref_count--;
4285 /* Ensure that IPv6 is disabled, and LL removed after ref_count reaches 0 */
4286 disable_ip6_interface (vm, sw_if_index);
4291 ip6_set_neighbor_limit (u32 neighbor_limit)
4293 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4295 nm->limit_neighbor_cache_size = neighbor_limit;
4300 ip6_neighbor_table_bind (ip6_main_t * im,
4303 u32 new_fib_index, u32 old_fib_index)
4305 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4306 ip6_neighbor_t *n = NULL;
4307 u32 i, *to_re_add = 0;
4310 pool_foreach (n, nm->neighbor_pool,
4312 if (n->key.sw_if_index == sw_if_index)
4313 vec_add1 (to_re_add, n - nm->neighbor_pool);
4317 for (i = 0; i < vec_len (to_re_add); i++)
4319 n = pool_elt_at_index (nm->neighbor_pool, to_re_add[i]);
4320 ip6_neighbor_adj_fib_remove (n, old_fib_index);
4321 ip6_neighbor_adj_fib_add (n, new_fib_index);
4323 vec_free (to_re_add);
4326 static clib_error_t *
4327 ip6_neighbor_init (vlib_main_t * vm)
4329 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4330 ip6_main_t *im = &ip6_main;
4332 mhash_init (&nm->neighbor_index_by_key,
4333 /* value size */ sizeof (uword),
4334 /* key size */ sizeof (ip6_neighbor_key_t));
4336 icmp6_register_type (vm, ICMP6_neighbor_solicitation,
4337 ip6_icmp_neighbor_solicitation_node.index);
4338 icmp6_register_type (vm, ICMP6_neighbor_advertisement,
4339 ip6_icmp_neighbor_advertisement_node.index);
4340 icmp6_register_type (vm, ICMP6_router_solicitation,
4341 ip6_icmp_router_solicitation_node.index);
4342 icmp6_register_type (vm, ICMP6_router_advertisement,
4343 ip6_icmp_router_advertisement_node.index);
4345 /* handler node for ip6 neighbor discovery events and timers */
4346 vlib_register_node (vm, &ip6_icmp_neighbor_discovery_event_node);
4348 /* add call backs */
4349 ip6_add_del_interface_address_callback_t cb;
4350 memset (&cb, 0x0, sizeof (ip6_add_del_interface_address_callback_t));
4352 /* when an interface address changes... */
4353 cb.function = ip6_neighbor_add_del_interface_address;
4354 cb.function_opaque = 0;
4355 vec_add1 (im->add_del_interface_address_callbacks, cb);
4357 ip6_table_bind_callback_t cbt;
4358 cbt.function = ip6_neighbor_table_bind;
4359 cbt.function_opaque = 0;
4360 vec_add1 (im->table_bind_callbacks, cbt);
4362 mhash_init (&nm->pending_resolutions_by_address,
4363 /* value size */ sizeof (uword),
4364 /* key size */ sizeof (ip6_address_t));
4366 mhash_init (&nm->mac_changes_by_address,
4367 /* value size */ sizeof (uword),
4368 /* key size */ sizeof (ip6_address_t));
4370 /* default, configurable */
4371 nm->limit_neighbor_cache_size = 50000;
4373 nm->wc_ip6_nd_publisher_node = (uword) ~ 0;
4375 nm->ip6_ra_publisher_node = (uword) ~ 0;
4378 /* $$$$ Hack fix for today */
4379 vec_validate_init_empty
4380 (im->discover_neighbor_next_index_by_hw_if_index, 32, 0 /* drop */ );
4386 VLIB_INIT_FUNCTION (ip6_neighbor_init);
4390 vnet_register_ip6_neighbor_resolution_event (vnet_main_t * vnm,
4393 uword type_opaque, uword data)
4395 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4396 ip6_address_t *address = address_arg;
4398 pending_resolution_t *pr;
4400 pool_get (nm->pending_resolutions, pr);
4402 pr->next_index = ~0;
4403 pr->node_index = node_index;
4404 pr->type_opaque = type_opaque;
4407 p = mhash_get (&nm->pending_resolutions_by_address, address);
4410 /* Insert new resolution at the head of the list */
4411 pr->next_index = p[0];
4412 mhash_unset (&nm->pending_resolutions_by_address, address, 0);
4415 mhash_set (&nm->pending_resolutions_by_address, address,
4416 pr - nm->pending_resolutions, 0 /* old value */ );
4420 vnet_add_del_ip6_nd_change_event (vnet_main_t * vnm,
4421 void *data_callback,
4425 uword type_opaque, uword data, int is_add)
4427 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4428 ip6_address_t *address = address_arg;
4430 /* Try to find an existing entry */
4431 u32 *first = (u32 *) mhash_get (&nm->mac_changes_by_address, address);
4433 pending_resolution_t *mc;
4434 while (p && *p != ~0)
4436 mc = pool_elt_at_index (nm->mac_changes, *p);
4437 if (mc->node_index == node_index && mc->type_opaque == type_opaque
4440 p = &mc->next_index;
4443 int found = p && *p != ~0;
4447 return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
4449 pool_get (nm->mac_changes, mc);
4450 *mc = (pending_resolution_t)
4452 .next_index = ~0,.node_index = node_index,.type_opaque =
4453 type_opaque,.data = data,.data_callback = data_callback,.pid =
4456 /* Insert new resolution at the end of the list */
4457 u32 new_idx = mc - nm->mac_changes;
4461 mhash_set (&nm->mac_changes_by_address, address, new_idx, 0);
4466 return VNET_API_ERROR_NO_SUCH_ENTRY;
4468 /* Clients may need to clean up pool entries, too */
4469 void (*fp) (u32, u8 *) = data_callback;
4471 (*fp) (mc->data, 0 /* no new mac addrs */ );
4473 /* Remove the entry from the list and delete the entry */
4474 *p = mc->next_index;
4475 pool_put (nm->mac_changes, mc);
4477 /* Remove from hash if we deleted the last entry */
4478 if (*p == ~0 && p == first)
4479 mhash_unset (&nm->mac_changes_by_address, address, 0);
4485 vnet_ip6_nd_term (vlib_main_t * vm,
4486 vlib_node_runtime_t * node,
4488 ethernet_header_t * eth,
4489 ip6_header_t * ip, u32 sw_if_index, u16 bd_index)
4491 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4492 icmp6_neighbor_solicitation_or_advertisement_header_t *ndh;
4494 ndh = ip6_next_header (ip);
4495 if (ndh->icmp.type != ICMP6_neighbor_solicitation &&
4496 ndh->icmp.type != ICMP6_neighbor_advertisement)
4499 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
4500 (p0->flags & VLIB_BUFFER_IS_TRACED)))
4502 u8 *t0 = vlib_add_trace (vm, node, p0,
4503 sizeof (icmp6_input_trace_t));
4504 clib_memcpy (t0, ip, sizeof (icmp6_input_trace_t));
4507 /* Check if anyone want ND events for L2 BDs */
4509 (nm->wc_ip6_nd_publisher_node != (uword) ~ 0
4510 && !ip6_address_is_link_local_unicast (&ip->src_address)))
4512 vnet_nd_wc_publish (sw_if_index, eth->src_address, &ip->src_address);
4515 /* Check if MAC entry exsist for solicited target IP */
4516 if (ndh->icmp.type == ICMP6_neighbor_solicitation)
4518 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *opt;
4519 l2_bridge_domain_t *bd_config;
4522 opt = (void *) (ndh + 1);
4523 if ((opt->header.type !=
4524 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address) ||
4525 (opt->header.n_data_u64s != 1))
4526 return 0; /* source link layer address option not present */
4528 bd_config = vec_elt_at_index (l2input_main.bd_configs, bd_index);
4530 (u8 *) hash_get_mem (bd_config->mac_by_ip6, &ndh->target_address);
4532 { /* found ip-mac entry, generate eighbor advertisement response */
4534 vlib_node_runtime_t *error_node =
4535 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
4536 ip->dst_address = ip->src_address;
4537 ip->src_address = ndh->target_address;
4538 ip->hop_limit = 255;
4540 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
4541 clib_memcpy (opt->ethernet_address, macp, 6);
4542 ndh->icmp.type = ICMP6_neighbor_advertisement;
4543 ndh->advertisement_flags = clib_host_to_net_u32
4544 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED |
4545 ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
4546 ndh->icmp.checksum = 0;
4547 ndh->icmp.checksum =
4548 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip, &bogus_length);
4549 clib_memcpy (eth->dst_address, eth->src_address, 6);
4550 clib_memcpy (eth->src_address, macp, 6);
4551 vlib_error_count (vm, error_node->node_index,
4552 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX, 1);
4562 ip6_neighbor_proxy_add_del (u32 sw_if_index, ip6_address_t * addr, u8 is_del)
4566 fib_prefix_t pfx = {
4568 .fp_proto = FIB_PROTOCOL_IP6,
4573 ip46_address_t nh = {
4577 fib_index = ip6_fib_table_get_index_for_sw_if_index (sw_if_index);
4579 if (~0 == fib_index)
4580 return VNET_API_ERROR_NO_SUCH_FIB;
4584 fib_table_entry_path_remove (fib_index,
4586 FIB_SOURCE_IP6_ND_PROXY,
4590 ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
4591 /* flush the ND cache of this address if it's there */
4592 vnet_unset_ip6_ethernet_neighbor (vlib_get_main (),
4593 sw_if_index, addr, NULL, 0);
4597 fib_table_entry_path_add (fib_index,
4599 FIB_SOURCE_IP6_ND_PROXY,
4600 FIB_ENTRY_FLAG_NONE,
4604 ~0, 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
4609 static clib_error_t *
4610 set_ip6_nd_proxy_cmd (vlib_main_t * vm,
4611 unformat_input_t * input, vlib_cli_command_t * cmd)
4613 vnet_main_t *vnm = vnet_get_main ();
4614 clib_error_t *error = 0;
4619 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4621 /* get the rest of the command */
4622 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
4624 if (unformat (input, "%U", unformat_ip6_address, &addr))
4626 else if (unformat (input, "delete") || unformat (input, "del"))
4629 return (unformat_parse_error (input));
4633 ip6_neighbor_proxy_add_del (sw_if_index, &addr, is_del);
4639 VLIB_CLI_COMMAND (set_ip6_nd_proxy_command, static) =
4641 .path = "set ip6 nd proxy",
4642 .short_help = "set ip6 nd proxy <HOST> <INTERFACE>",
4643 .function = set_ip6_nd_proxy_cmd,
4648 ethernet_ndp_change_mac (u32 sw_if_index)
4650 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4655 pool_foreach (n, nm->neighbor_pool,
4657 if (n->key.sw_if_index == sw_if_index)
4659 adj_nbr_walk_nh6 (sw_if_index,
4660 &n->key.ip6_address,
4661 ip6_nd_mk_complete_walk, n);
4666 ai = adj_glean_get (FIB_PROTOCOL_IP6, sw_if_index);
4668 if (ADJ_INDEX_INVALID != ai)
4669 adj_glean_update_rewrite (ai);
4673 send_ip6_na (vlib_main_t * vm, vnet_hw_interface_t * hi)
4675 ip6_main_t *i6m = &ip6_main;
4676 u32 sw_if_index = hi->sw_if_index;
4677 ip6_address_t *ip6_addr = ip6_interface_first_address (i6m, sw_if_index);
4681 ("Sending unsolicitated NA IP6 address %U on sw_if_idex %d",
4682 format_ip6_address, ip6_addr, sw_if_index);
4684 /* Form unsolicited neighbor advertisement packet from NS pkt template */
4687 icmp6_neighbor_solicitation_header_t *h =
4688 vlib_packet_template_get_packet (vm,
4689 &i6m->discover_neighbor_packet_template,
4691 ip6_set_reserved_multicast_address (&h->ip.dst_address,
4692 IP6_MULTICAST_SCOPE_link_local,
4693 IP6_MULTICAST_GROUP_ID_all_hosts);
4694 h->ip.src_address = ip6_addr[0];
4695 h->neighbor.icmp.type = ICMP6_neighbor_advertisement;
4696 h->neighbor.target_address = ip6_addr[0];
4697 h->neighbor.advertisement_flags = clib_host_to_net_u32
4698 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
4699 clib_memcpy (h->link_layer_option.ethernet_address,
4700 hi->hw_address, vec_len (hi->hw_address));
4701 h->neighbor.icmp.checksum =
4702 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
4703 ASSERT (bogus_length == 0);
4705 /* Setup MAC header with IP6 Etype and mcast DMAC */
4706 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
4707 vlib_buffer_advance (b, -sizeof (ethernet_header_t));
4708 ethernet_header_t *e = vlib_buffer_get_current (b);
4709 e->type = clib_host_to_net_u16 (ETHERNET_TYPE_IP6);
4710 clib_memcpy (e->src_address, hi->hw_address, sizeof (e->src_address));
4711 ip6_multicast_ethernet_address (e->dst_address,
4712 IP6_MULTICAST_GROUP_ID_all_hosts);
4714 /* Send unsolicited ND advertisement packet out the specified interface */
4715 vnet_buffer (b)->sw_if_index[VLIB_RX] =
4716 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
4717 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
4718 u32 *to_next = vlib_frame_vector_args (f);
4721 vlib_put_frame_to_node (vm, hi->output_node_index, f);
4726 * fd.io coding-style-patch-verification: ON
4729 * eval: (c-set-style "gnu")