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 <vppinfra/md5.h>
23 #include <vnet/adj/adj.h>
24 #include <vnet/adj/adj_mcast.h>
25 #include <vnet/fib/fib_table.h>
26 #include <vnet/fib/ip6_fib.h>
27 #include <vnet/mfib/ip6_mfib.h>
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;
165 /* Used for nd event notification only */
168 } pending_resolution_t;
173 /* Hash tables mapping name to opcode. */
174 uword *opcode_by_name;
176 /* lite beer "glean" adjacency handling */
177 mhash_t pending_resolutions_by_address;
178 pending_resolution_t *pending_resolutions;
180 /* Mac address change notification */
181 mhash_t mac_changes_by_address;
182 pending_resolution_t *mac_changes;
184 u32 *neighbor_input_next_index_by_hw_if_index;
186 ip6_neighbor_t *neighbor_pool;
188 mhash_t neighbor_index_by_key;
190 u32 *if_radv_pool_index_by_sw_if_index;
192 ip6_radv_t *if_radv_pool;
194 /* Neighbor attack mitigation */
195 u32 limit_neighbor_cache_size;
196 u32 neighbor_delete_rotor;
198 /* Wildcard nd report publisher */
199 uword wc_ip6_nd_publisher_node;
200 uword wc_ip6_nd_publisher_et;
201 } ip6_neighbor_main_t;
203 /* ipv6 neighbor discovery - timer/event types */
207 } ip6_icmp_neighbor_discovery_event_type_t;
217 } ip6_icmp_neighbor_discovery_event_data_t;
219 static ip6_neighbor_main_t ip6_neighbor_main;
220 static ip6_address_t ip6a_zero; /* ip6 address 0 */
222 static void wc_nd_signal_report (wc_nd_report_t * r);
225 * @brief publish wildcard arp event
226 * @param sw_if_index The interface on which the ARP entires are acted
229 vnet_nd_wc_publish (u32 sw_if_index, u8 * mac, ip6_address_t * ip6)
232 .sw_if_index = sw_if_index,
235 memcpy (r.mac, mac, sizeof r.mac);
237 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
238 vl_api_rpc_call_main_thread (wc_nd_signal_report, (u8 *) & r, sizeof r);
243 wc_nd_signal_report (wc_nd_report_t * r)
245 vlib_main_t *vm = vlib_get_main ();
246 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
247 uword ni = nm->wc_ip6_nd_publisher_node;
248 uword et = nm->wc_ip6_nd_publisher_et;
250 if (ni == (uword) ~ 0)
253 vlib_process_signal_event_data (vm, ni, et, 1, sizeof *q);
259 wc_nd_set_publisher_node (uword node_index, uword event_type)
261 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
262 nm->wc_ip6_nd_publisher_node = node_index;
263 nm->wc_ip6_nd_publisher_et = event_type;
267 format_ip6_neighbor_ip6_entry (u8 * s, va_list * va)
269 vlib_main_t *vm = va_arg (*va, vlib_main_t *);
270 ip6_neighbor_t *n = va_arg (*va, ip6_neighbor_t *);
271 vnet_main_t *vnm = vnet_get_main ();
272 vnet_sw_interface_t *si;
276 return format (s, "%=12s%=20s%=6s%=20s%=40s", "Time", "Address", "Flags",
277 "Link layer", "Interface");
279 if (n->flags & IP6_NEIGHBOR_FLAG_DYNAMIC)
280 flags = format (flags, "D");
282 if (n->flags & IP6_NEIGHBOR_FLAG_STATIC)
283 flags = format (flags, "S");
285 if (n->flags & IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY)
286 flags = format (flags, "N");
288 si = vnet_get_sw_interface (vnm, n->key.sw_if_index);
289 s = format (s, "%=12U%=20U%=6s%=20U%=40U",
290 format_vlib_cpu_time, vm, n->cpu_time_last_updated,
291 format_ip6_address, &n->key.ip6_address,
292 flags ? (char *) flags : "",
293 format_ethernet_address, n->link_layer_address,
294 format_vnet_sw_interface_name, vnm, si);
301 ip6_neighbor_adj_fib_remove (ip6_neighbor_t * n, u32 fib_index)
303 if (FIB_NODE_INDEX_INVALID != n->fib_entry_index)
307 .fp_proto = FIB_PROTOCOL_IP6,
308 .fp_addr.ip6 = n->key.ip6_address,
310 fib_table_entry_path_remove (fib_index,
315 n->key.sw_if_index, ~0,
316 1, FIB_ROUTE_PATH_FLAG_NONE);
320 static clib_error_t *
321 ip6_neighbor_sw_interface_up_down (vnet_main_t * vnm,
322 u32 sw_if_index, u32 flags)
324 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
327 if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
329 u32 i, *to_delete = 0;
332 pool_foreach (n, nm->neighbor_pool,
334 if (n->key.sw_if_index == sw_if_index)
335 vec_add1 (to_delete, n - nm->neighbor_pool);
339 for (i = 0; i < vec_len (to_delete); i++)
341 n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
342 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
343 ip6_neighbor_adj_fib_remove (n,
344 ip6_fib_table_get_index_for_sw_if_index
345 (n->key.sw_if_index));
346 pool_put (nm->neighbor_pool, n);
348 vec_free (to_delete);
354 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_neighbor_sw_interface_up_down);
357 unset_random_neighbor_entry (void)
359 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
360 vnet_main_t *vnm = vnet_get_main ();
361 vlib_main_t *vm = vnm->vlib_main;
365 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
366 nm->neighbor_delete_rotor = index;
368 /* Try again from elt 0, could happen if an intfc goes down */
371 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
372 nm->neighbor_delete_rotor = index;
375 /* Nothing left in the pool */
379 e = pool_elt_at_index (nm->neighbor_pool, index);
381 vnet_unset_ip6_ethernet_neighbor (vm, e->key.sw_if_index,
383 e->link_layer_address,
392 u8 link_layer_address[6];
395 } ip6_neighbor_set_unset_rpc_args_t;
397 static void ip6_neighbor_set_unset_rpc_callback
398 (ip6_neighbor_set_unset_rpc_args_t * a);
400 static void set_unset_ip6_neighbor_rpc
403 ip6_address_t * a, u8 * link_layer_address, int is_add, int is_static,
406 ip6_neighbor_set_unset_rpc_args_t args;
407 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
409 args.sw_if_index = sw_if_index;
410 args.is_add = is_add;
411 args.is_static = is_static;
412 args.is_no_fib_entry = is_no_fib_entry;
413 clib_memcpy (&args.addr, a, sizeof (*a));
414 if (NULL != link_layer_address)
415 clib_memcpy (args.link_layer_address, link_layer_address, 6);
417 vl_api_rpc_call_main_thread (ip6_neighbor_set_unset_rpc_callback,
418 (u8 *) & args, sizeof (args));
422 ip6_nbr_probe (ip_adjacency_t * adj)
424 icmp6_neighbor_solicitation_header_t *h;
425 vnet_main_t *vnm = vnet_get_main ();
426 ip6_main_t *im = &ip6_main;
427 ip_interface_address_t *ia;
428 ip6_address_t *dst, *src;
429 vnet_hw_interface_t *hi;
430 vnet_sw_interface_t *si;
436 vm = vlib_get_main ();
438 si = vnet_get_sw_interface (vnm, adj->rewrite_header.sw_if_index);
439 dst = &adj->sub_type.nbr.next_hop.ip6;
441 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
445 src = ip6_interface_address_matching_destination (im, dst,
453 h = vlib_packet_template_get_packet (vm,
454 &im->discover_neighbor_packet_template,
457 hi = vnet_get_sup_hw_interface (vnm, adj->rewrite_header.sw_if_index);
459 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
460 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
461 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
462 h->ip.src_address = src[0];
463 h->neighbor.target_address = dst[0];
465 clib_memcpy (h->link_layer_option.ethernet_address,
466 hi->hw_address, vec_len (hi->hw_address));
468 h->neighbor.icmp.checksum =
469 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
470 ASSERT (bogus_length == 0);
472 b = vlib_get_buffer (vm, bi);
473 vnet_buffer (b)->sw_if_index[VLIB_RX] =
474 vnet_buffer (b)->sw_if_index[VLIB_TX] = adj->rewrite_header.sw_if_index;
476 /* Add encapsulation string for software interface (e.g. ethernet header). */
477 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
478 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
481 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
482 u32 *to_next = vlib_frame_vector_args (f);
485 vlib_put_frame_to_node (vm, hi->output_node_index, f);
490 ip6_nd_mk_complete (adj_index_t ai, ip6_neighbor_t * nbr)
492 adj_nbr_update_rewrite (ai, ADJ_NBR_REWRITE_FLAG_COMPLETE,
493 ethernet_build_rewrite (vnet_get_main (),
494 nbr->key.sw_if_index,
495 adj_get_link_type (ai),
496 nbr->link_layer_address));
500 ip6_nd_mk_incomplete (adj_index_t ai)
502 ip_adjacency_t *adj = adj_get (ai);
504 adj_nbr_update_rewrite (ai,
505 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
506 ethernet_build_rewrite (vnet_get_main (),
509 adj_get_link_type (ai),
510 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
513 #define IP6_NBR_MK_KEY(k, sw_if_index, addr) \
515 k.sw_if_index = sw_if_index; \
516 k.ip6_address = *addr; \
520 static ip6_neighbor_t *
521 ip6_nd_find (u32 sw_if_index, const ip6_address_t * addr)
523 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
524 ip6_neighbor_t *n = NULL;
525 ip6_neighbor_key_t k;
528 IP6_NBR_MK_KEY (k, sw_if_index, addr);
530 p = mhash_get (&nm->neighbor_index_by_key, &k);
533 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
540 ip6_nd_mk_complete_walk (adj_index_t ai, void *ctx)
542 ip6_neighbor_t *nbr = ctx;
544 ip6_nd_mk_complete (ai, nbr);
546 return (ADJ_WALK_RC_CONTINUE);
550 ip6_nd_mk_incomplete_walk (adj_index_t ai, void *ctx)
552 ip6_nd_mk_incomplete (ai);
554 return (ADJ_WALK_RC_CONTINUE);
558 ip6_ethernet_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
565 nbr = ip6_nd_find (sw_if_index, &adj->sub_type.nbr.next_hop.ip6);
567 switch (adj->lookup_next_index)
569 case IP_LOOKUP_NEXT_ARP:
570 case IP_LOOKUP_NEXT_GLEAN:
573 adj_nbr_walk_nh6 (sw_if_index, &nbr->key.ip6_address,
574 ip6_nd_mk_complete_walk, nbr);
579 * no matching ND entry.
580 * construct the rewrite required to for an ND packet, and stick
581 * that in the adj's pipe to smoke.
583 adj_nbr_update_rewrite (ai,
584 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
585 ethernet_build_rewrite (vnm,
588 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
591 * since the FIB has added this adj for a route, it makes sense it may
592 * want to forward traffic sometime soon. Let's send a speculative ND.
593 * just one. If we were to do periodically that wouldn't be bad either,
594 * but that's more code than i'm prepared to write at this time for
595 * relatively little reward.
600 case IP_LOOKUP_NEXT_MCAST:
603 * Construct a partial rewrite from the known ethernet mcast dest MAC
608 rewrite = ethernet_build_rewrite (vnm,
611 ethernet_ip6_mcast_dst_addr ());
614 * Complete the remaining fields of the adj's rewrite to direct the
615 * complete of the rewrite at switch time by copying in the IP
616 * dst address's bytes.
617 * Ofset is 2 bytes into the desintation address. And we write 4 bytes.
619 offset = vec_len (rewrite) - 2;
620 adj_mcast_update_rewrite (ai, rewrite, offset, 0xffffffff);
624 case IP_LOOKUP_NEXT_DROP:
625 case IP_LOOKUP_NEXT_PUNT:
626 case IP_LOOKUP_NEXT_LOCAL:
627 case IP_LOOKUP_NEXT_REWRITE:
628 case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
629 case IP_LOOKUP_NEXT_MIDCHAIN:
630 case IP_LOOKUP_NEXT_ICMP_ERROR:
631 case IP_LOOKUP_N_NEXT:
639 ip6_neighbor_adj_fib_add (ip6_neighbor_t * n, u32 fib_index)
643 .fp_proto = FIB_PROTOCOL_IP6,
644 .fp_addr.ip6 = n->key.ip6_address,
648 fib_table_entry_path_add (fib_index, &pfx, FIB_SOURCE_ADJ,
649 FIB_ENTRY_FLAG_ATTACHED,
650 DPO_PROTO_IP6, &pfx.fp_addr,
651 n->key.sw_if_index, ~0, 1, NULL,
652 FIB_ROUTE_PATH_FLAG_NONE);
656 vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
659 u8 * link_layer_address,
660 uword n_bytes_link_layer_address,
661 int is_static, int is_no_fib_entry)
663 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
664 ip6_neighbor_key_t k;
665 ip6_neighbor_t *n = 0;
666 int make_new_nd_cache_entry = 1;
669 pending_resolution_t *pr, *mc;
671 if (vlib_get_thread_index ())
673 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
674 1 /* set new neighbor */ , is_static,
679 k.sw_if_index = sw_if_index;
680 k.ip6_address = a[0];
683 p = mhash_get (&nm->neighbor_index_by_key, &k);
686 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
687 /* Refuse to over-write static neighbor entry. */
688 if (!is_static && (n->flags & IP6_NEIGHBOR_FLAG_STATIC))
690 make_new_nd_cache_entry = 0;
693 if (make_new_nd_cache_entry)
695 pool_get (nm->neighbor_pool, n);
696 mhash_set (&nm->neighbor_index_by_key, &k, n - nm->neighbor_pool,
699 n->fib_entry_index = FIB_NODE_INDEX_INVALID;
701 clib_memcpy (n->link_layer_address,
702 link_layer_address, n_bytes_link_layer_address);
705 * create the adj-fib. the entry in the FIB table for and to the peer.
707 if (!is_no_fib_entry)
709 ip6_neighbor_adj_fib_add (n,
710 ip6_fib_table_get_index_for_sw_if_index
711 (n->key.sw_if_index));
715 n->flags |= IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY;
721 * prevent a DoS attack from the data-plane that
722 * spams us with no-op updates to the MAC address
724 if (0 == memcmp (n->link_layer_address,
725 link_layer_address, n_bytes_link_layer_address))
726 goto check_customers;
728 clib_memcpy (n->link_layer_address,
729 link_layer_address, n_bytes_link_layer_address);
732 /* Update time stamp and flags. */
733 n->cpu_time_last_updated = clib_cpu_time_now ();
735 n->flags |= IP6_NEIGHBOR_FLAG_STATIC;
737 n->flags |= IP6_NEIGHBOR_FLAG_DYNAMIC;
739 adj_nbr_walk_nh6 (sw_if_index,
740 &n->key.ip6_address, ip6_nd_mk_complete_walk, n);
743 /* Customer(s) waiting for this address to be resolved? */
744 p = mhash_get (&nm->pending_resolutions_by_address, a);
749 while (next_index != (u32) ~ 0)
751 pr = pool_elt_at_index (nm->pending_resolutions, next_index);
752 vlib_process_signal_event (vm, pr->node_index,
753 pr->type_opaque, pr->data);
754 next_index = pr->next_index;
755 pool_put (nm->pending_resolutions, pr);
758 mhash_unset (&nm->pending_resolutions_by_address, a, 0);
761 /* Customer(s) requesting ND event for this address? */
762 p = mhash_get (&nm->mac_changes_by_address, a);
767 while (next_index != (u32) ~ 0)
769 int (*fp) (u32, u8 *, u32, ip6_address_t *);
771 mc = pool_elt_at_index (nm->mac_changes, next_index);
772 fp = mc->data_callback;
774 /* Call the user's data callback, return 1 to suppress dup events */
777 (*fp) (mc->data, link_layer_address, sw_if_index, &ip6a_zero);
779 * Signal the resolver process, as long as the user
780 * says they want to be notified
783 vlib_process_signal_event (vm, mc->node_index,
784 mc->type_opaque, mc->data);
785 next_index = mc->next_index;
793 vnet_unset_ip6_ethernet_neighbor (vlib_main_t * vm,
796 u8 * link_layer_address,
797 uword n_bytes_link_layer_address)
799 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
800 ip6_neighbor_key_t k;
805 if (vlib_get_thread_index ())
807 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
808 0 /* unset */ , 0, 0);
812 k.sw_if_index = sw_if_index;
813 k.ip6_address = a[0];
816 p = mhash_get (&nm->neighbor_index_by_key, &k);
823 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
824 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
826 adj_nbr_walk_nh6 (sw_if_index,
827 &n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL);
830 if (FIB_NODE_INDEX_INVALID != n->fib_entry_index)
834 .fp_proto = FIB_PROTOCOL_IP6,
835 .fp_addr.ip6 = n->key.ip6_address,
837 fib_table_entry_path_remove
838 (ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index),
842 &pfx.fp_addr, n->key.sw_if_index, ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
844 pool_put (nm->neighbor_pool, n);
850 static void ip6_neighbor_set_unset_rpc_callback
851 (ip6_neighbor_set_unset_rpc_args_t * a)
853 vlib_main_t *vm = vlib_get_main ();
855 vnet_set_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
856 a->link_layer_address, 6, a->is_static,
859 vnet_unset_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
860 a->link_layer_address, 6);
864 ip6_neighbor_sort (void *a1, void *a2)
866 vnet_main_t *vnm = vnet_get_main ();
867 ip6_neighbor_t *n1 = a1, *n2 = a2;
869 cmp = vnet_sw_interface_compare (vnm, n1->key.sw_if_index,
870 n2->key.sw_if_index);
872 cmp = ip6_address_compare (&n1->key.ip6_address, &n2->key.ip6_address);
877 ip6_neighbors_entries (u32 sw_if_index)
879 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
880 ip6_neighbor_t *n, *ns = 0;
883 pool_foreach (n, nm->neighbor_pool,
885 if (sw_if_index != ~0 && n->key.sw_if_index != sw_if_index)
892 vec_sort_with_function (ns, ip6_neighbor_sort);
896 static clib_error_t *
897 show_ip6_neighbors (vlib_main_t * vm,
898 unformat_input_t * input, vlib_cli_command_t * cmd)
900 vnet_main_t *vnm = vnet_get_main ();
901 ip6_neighbor_t *n, *ns;
902 clib_error_t *error = 0;
905 /* Filter entries by interface if given. */
907 (void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index);
909 ns = ip6_neighbors_entries (sw_if_index);
912 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, 0);
915 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, n);
924 * This command is used to display the adjacent IPv6 hosts found via
925 * neighbor discovery. Optionally, limit the output to the specified
929 * Example of how to display the IPv6 neighbor adjacency table:
930 * @cliexstart{show ip6 neighbors}
931 * Time Address Flags Link layer Interface
932 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
933 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
934 * 886.6654 ::1:1:c:0:9 S 02:fe:e4:45:27:5b GigabitEthernet3/0/0
936 * Example of how to display the IPv6 neighbor adjacency table for given interface:
937 * @cliexstart{show ip6 neighbors GigabitEthernet2/0/0}
938 * Time Address Flags Link layer Interface
939 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
940 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
944 VLIB_CLI_COMMAND (show_ip6_neighbors_command, static) = {
945 .path = "show ip6 neighbors",
946 .function = show_ip6_neighbors,
947 .short_help = "show ip6 neighbors [<interface>]",
951 static clib_error_t *
952 set_ip6_neighbor (vlib_main_t * vm,
953 unformat_input_t * input, vlib_cli_command_t * cmd)
955 vnet_main_t *vnm = vnet_get_main ();
961 int is_no_fib_entry = 0;
964 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
966 /* intfc, ip6-address, mac-address */
967 if (unformat (input, "%U %U %U",
968 unformat_vnet_sw_interface, vnm, &sw_if_index,
969 unformat_ip6_address, &addr,
970 unformat_ethernet_address, mac_address))
973 else if (unformat (input, "delete") || unformat (input, "del"))
975 else if (unformat (input, "static"))
977 else if (unformat (input, "no-fib-entry"))
984 return clib_error_return (0, "Missing interface, ip6 or hw address");
987 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
988 mac_address, sizeof (mac_address),
989 is_static, is_no_fib_entry);
991 vnet_unset_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
992 mac_address, sizeof (mac_address));
997 * This command is used to manually add an entry to the IPv6 neighbor
998 * adjacency table. Optionally, the entry can be added as static. It is
999 * also used to remove an entry from the table. Use the '<em>show ip6
1000 * neighbors</em>' command to display all learned and manually entered entries.
1003 * Example of how to add a static entry to the IPv6 neighbor adjacency table:
1004 * @cliexcmd{set ip6 neighbor GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b static}
1005 * Example of how to delete an entry from the IPv6 neighbor adjacency table:
1006 * @cliexcmd{set ip6 neighbor del GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b}
1009 VLIB_CLI_COMMAND (set_ip6_neighbor_command, static) =
1011 .path = "set ip6 neighbor",
1012 .function = set_ip6_neighbor,
1013 .short_help = "set ip6 neighbor [del] <interface> <ip6-address> <mac-address> [static]",
1019 ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP,
1020 ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY,
1021 ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
1022 } icmp6_neighbor_solicitation_or_advertisement_next_t;
1024 static_always_inline uword
1025 icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
1026 vlib_node_runtime_t * node,
1027 vlib_frame_t * frame,
1028 uword is_solicitation)
1030 vnet_main_t *vnm = vnet_get_main ();
1031 ip6_main_t *im = &ip6_main;
1032 uword n_packets = frame->n_vectors;
1033 u32 *from, *to_next;
1034 u32 n_left_from, n_left_to_next, next_index, n_advertisements_sent;
1035 icmp6_neighbor_discovery_option_type_t option_type;
1036 vlib_node_runtime_t *error_node =
1037 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1040 from = vlib_frame_vector_args (frame);
1041 n_left_from = n_packets;
1042 next_index = node->cached_next_index;
1044 if (node->flags & VLIB_NODE_FLAG_TRACE)
1045 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1047 sizeof (icmp6_input_trace_t));
1051 ? ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address
1052 : ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address);
1053 n_advertisements_sent = 0;
1055 while (n_left_from > 0)
1057 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1059 while (n_left_from > 0 && n_left_to_next > 0)
1063 icmp6_neighbor_solicitation_or_advertisement_header_t *h0;
1064 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1065 u32 bi0, options_len0, sw_if_index0, next0, error0;
1066 u32 ip6_sadd_link_local, ip6_sadd_unspecified;
1070 bi0 = to_next[0] = from[0];
1075 n_left_to_next -= 1;
1077 p0 = vlib_get_buffer (vm, bi0);
1078 ip0 = vlib_buffer_get_current (p0);
1079 h0 = ip6_next_header (ip0);
1081 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1083 error0 = ICMP6_ERROR_NONE;
1084 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1085 ip6_sadd_link_local =
1086 ip6_address_is_link_local_unicast (&ip0->src_address);
1087 ip6_sadd_unspecified =
1088 ip6_address_is_unspecified (&ip0->src_address);
1090 /* Check that source address is unspecified, link-local or else on-link. */
1091 if (!ip6_sadd_unspecified && !ip6_sadd_link_local)
1093 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1095 if (ADJ_INDEX_INVALID != src_adj_index0)
1097 ip_adjacency_t *adj0 = adj_get (src_adj_index0);
1099 /* Allow all realistic-looking rewrite adjacencies to pass */
1100 ni0 = adj0->lookup_next_index;
1101 is_rewrite0 = (ni0 >= IP_LOOKUP_NEXT_ARP) &&
1102 (ni0 < IP6_LOOKUP_N_NEXT);
1104 error0 = ((adj0->rewrite_header.sw_if_index != sw_if_index0
1107 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK
1113 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK;
1117 o0 = (void *) (h0 + 1);
1118 o0 = ((options_len0 == 8 && o0->header.type == option_type
1119 && o0->header.n_data_u64s == 1) ? o0 : 0);
1121 /* If src address unspecified or link local, donot learn neighbor MAC */
1122 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1123 !ip6_sadd_unspecified))
1125 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1126 if (nm->limit_neighbor_cache_size &&
1127 pool_elts (nm->neighbor_pool) >=
1128 nm->limit_neighbor_cache_size)
1129 unset_random_neighbor_entry ();
1130 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1133 &h0->target_address,
1134 o0->ethernet_address,
1135 sizeof (o0->ethernet_address),
1136 0, ip6_sadd_link_local);
1139 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1141 /* Check that target address is local to this router. */
1142 fib_node_index_t fei;
1146 ip6_fib_table_get_index_for_sw_if_index (sw_if_index0);
1148 if (~0 == fib_index)
1150 error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1154 fei = ip6_fib_table_lookup_exact_match (fib_index,
1155 &h0->target_address,
1158 if (FIB_NODE_INDEX_INVALID == fei)
1160 /* The target address is not in the FIB */
1162 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1166 if (FIB_ENTRY_FLAG_LOCAL &
1167 fib_entry_get_flags_for_source (fei,
1168 FIB_SOURCE_INTERFACE))
1170 /* It's an address that belongs to one of our interfaces
1174 if (fib_entry_is_sourced
1175 (fei, FIB_SOURCE_IP6_ND_PROXY))
1177 /* The address was added by IPv6 Proxy ND config.
1178 * We should only respond to these if the NS arrived on
1179 * the link that has a matching covering prefix */
1184 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1190 if (is_solicitation)
1191 next0 = (error0 != ICMP6_ERROR_NONE
1192 ? ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP
1193 : ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY);
1197 error0 = error0 == ICMP6_ERROR_NONE ?
1198 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_RX : error0;
1201 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1203 vnet_sw_interface_t *sw_if0;
1204 ethernet_interface_t *eth_if0;
1205 ethernet_header_t *eth0;
1207 /* dst address is either source address or the all-nodes mcast addr */
1208 if (!ip6_sadd_unspecified)
1209 ip0->dst_address = ip0->src_address;
1211 ip6_set_reserved_multicast_address (&ip0->dst_address,
1212 IP6_MULTICAST_SCOPE_link_local,
1213 IP6_MULTICAST_GROUP_ID_all_hosts);
1215 ip0->src_address = h0->target_address;
1216 ip0->hop_limit = 255;
1217 h0->icmp.type = ICMP6_neighbor_advertisement;
1219 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1220 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1222 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1225 clib_memcpy (o0->ethernet_address, eth_if0->address, 6);
1227 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
1230 h0->advertisement_flags = clib_host_to_net_u32
1231 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED
1232 | ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
1234 h0->icmp.checksum = 0;
1236 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1238 ASSERT (bogus_length == 0);
1240 /* Reuse current MAC header, copy SMAC to DMAC and
1241 * interface MAC to SMAC */
1242 vlib_buffer_advance (p0, -ethernet_buffer_header_size (p0));
1243 eth0 = vlib_buffer_get_current (p0);
1244 clib_memcpy (eth0->dst_address, eth0->src_address, 6);
1246 clib_memcpy (eth0->src_address, eth_if0->address, 6);
1248 /* Setup input and output sw_if_index for packet */
1249 ASSERT (vnet_buffer (p0)->sw_if_index[VLIB_RX] == sw_if_index0);
1250 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1251 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1252 vnet_main.local_interface_sw_if_index;
1254 n_advertisements_sent++;
1257 p0->error = error_node->errors[error0];
1259 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1260 to_next, n_left_to_next,
1264 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1267 /* Account for advertisements sent. */
1268 vlib_error_count (vm, error_node->node_index,
1269 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX,
1270 n_advertisements_sent);
1272 return frame->n_vectors;
1275 /* for "syslogging" - use elog for now */
1276 #define foreach_log_level \
1277 _ (DEBUG, "DEBUG") \
1278 _ (INFO, "INFORMATION") \
1279 _ (NOTICE, "NOTICE") \
1280 _ (WARNING, "WARNING") \
1282 _ (CRIT, "CRITICAL") \
1283 _ (ALERT, "ALERT") \
1284 _ (EMERG, "EMERGENCY")
1288 #define _(f,s) LOG_##f,
1293 static char *log_level_strings[] = {
1299 static int logmask = 1 << LOG_DEBUG;
1302 ip6_neighbor_syslog (vlib_main_t * vm, int priority, char *fmt, ...)
1304 /* just use elog for now */
1308 if ((priority > LOG_EMERG) || !(logmask & (1 << priority)))
1314 what = va_format (0, fmt, &va);
1316 ELOG_TYPE_DECLARE (e) =
1318 .format = "ip6 nd: (%s): %s",.format_args = "T4T4",};
1323 ed = ELOG_DATA (&vm->elog_main, e);
1324 ed->s[0] = elog_string (&vm->elog_main, log_level_strings[priority]);
1325 ed->s[1] = elog_string (&vm->elog_main, (char *) what);
1331 /* ipv6 neighbor discovery - router advertisements */
1334 ICMP6_ROUTER_SOLICITATION_NEXT_DROP,
1335 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW,
1336 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX,
1337 ICMP6_ROUTER_SOLICITATION_N_NEXT,
1338 } icmp6_router_solicitation_or_advertisement_next_t;
1340 static_always_inline uword
1341 icmp6_router_solicitation (vlib_main_t * vm,
1342 vlib_node_runtime_t * node, vlib_frame_t * frame)
1344 vnet_main_t *vnm = vnet_get_main ();
1345 ip6_main_t *im = &ip6_main;
1346 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1347 uword n_packets = frame->n_vectors;
1348 u32 *from, *to_next;
1349 u32 n_left_from, n_left_to_next, next_index;
1350 u32 n_advertisements_sent = 0;
1353 icmp6_neighbor_discovery_option_type_t option_type;
1355 vlib_node_runtime_t *error_node =
1356 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1358 from = vlib_frame_vector_args (frame);
1359 n_left_from = n_packets;
1360 next_index = node->cached_next_index;
1362 if (node->flags & VLIB_NODE_FLAG_TRACE)
1363 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1365 sizeof (icmp6_input_trace_t));
1367 /* source may append his LL address */
1368 option_type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1370 while (n_left_from > 0)
1372 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1374 while (n_left_from > 0 && n_left_to_next > 0)
1378 ip6_radv_t *radv_info = 0;
1380 icmp6_neighbor_discovery_header_t *h0;
1381 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1383 u32 bi0, options_len0, sw_if_index0, next0, error0;
1384 u32 is_solicitation = 1, is_dropped = 0;
1385 u32 is_unspecified, is_link_local;
1387 bi0 = to_next[0] = from[0];
1392 n_left_to_next -= 1;
1394 p0 = vlib_get_buffer (vm, bi0);
1395 ip0 = vlib_buffer_get_current (p0);
1396 h0 = ip6_next_header (ip0);
1398 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1399 is_unspecified = ip6_address_is_unspecified (&ip0->src_address);
1401 ip6_address_is_link_local_unicast (&ip0->src_address);
1403 error0 = ICMP6_ERROR_NONE;
1404 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1406 /* check if solicitation (not from nd_timer node) */
1407 if (ip6_address_is_unspecified (&ip0->dst_address))
1408 is_solicitation = 0;
1410 /* Check that source address is unspecified, link-local or else on-link. */
1411 if (!is_unspecified && !is_link_local)
1413 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1415 if (ADJ_INDEX_INVALID != src_adj_index0)
1417 ip_adjacency_t *adj0 = adj_get (src_adj_index0);
1419 error0 = (adj0->rewrite_header.sw_if_index != sw_if_index0
1421 ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK
1426 error0 = ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK;
1430 /* check for source LL option and process */
1431 o0 = (void *) (h0 + 1);
1432 o0 = ((options_len0 == 8
1433 && o0->header.type == option_type
1434 && o0->header.n_data_u64s == 1) ? o0 : 0);
1436 /* if src address unspecified IGNORE any options */
1437 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1438 !is_unspecified && !is_link_local))
1440 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1441 if (nm->limit_neighbor_cache_size &&
1442 pool_elts (nm->neighbor_pool) >=
1443 nm->limit_neighbor_cache_size)
1444 unset_random_neighbor_entry ();
1446 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1448 o0->ethernet_address,
1449 sizeof (o0->ethernet_address),
1453 /* default is to drop */
1454 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1456 if (error0 == ICMP6_ERROR_NONE)
1458 vnet_sw_interface_t *sw_if0;
1459 ethernet_interface_t *eth_if0;
1462 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1463 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1465 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1467 /* only support ethernet interface type for now */
1469 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1472 if (error0 == ICMP6_ERROR_NONE)
1476 /* adjust the sizeof the buffer to just include the ipv6 header */
1477 p0->current_length -=
1479 sizeof (icmp6_neighbor_discovery_header_t));
1481 /* look up the radv_t information for this interface */
1482 vec_validate_init_empty
1483 (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
1485 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1488 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1492 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1495 if (error0 == ICMP6_ERROR_NONE)
1497 f64 now = vlib_time_now (vm);
1499 /* for solicited adverts - need to rate limit */
1500 if (is_solicitation)
1502 if (0 != radv_info->last_radv_time &&
1503 (now - radv_info->last_radv_time) <
1504 MIN_DELAY_BETWEEN_RAS)
1507 radv_info->last_radv_time = now;
1511 icmp6_router_advertisement_header_t rh;
1513 rh.icmp.type = ICMP6_router_advertisement;
1515 rh.icmp.checksum = 0;
1517 rh.current_hop_limit = radv_info->curr_hop_limit;
1518 rh.router_lifetime_in_sec =
1519 clib_host_to_net_u16
1520 (radv_info->adv_router_lifetime_in_sec);
1522 time_in_msec_between_retransmitted_neighbor_solicitations
1524 clib_host_to_net_u32 (radv_info->
1525 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
1526 rh.neighbor_reachable_time_in_msec =
1527 clib_host_to_net_u32 (radv_info->
1528 adv_neighbor_reachable_time_in_msec);
1531 (radv_info->adv_managed_flag) ?
1532 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP :
1535 ((radv_info->adv_other_flag) ?
1536 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP :
1540 u16 payload_length =
1541 sizeof (icmp6_router_advertisement_header_t);
1543 vlib_buffer_add_data (vm,
1544 vlib_buffer_get_free_list_index
1545 (p0), bi0, (void *) &rh,
1547 (icmp6_router_advertisement_header_t));
1549 if (radv_info->adv_link_layer_address)
1551 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
1555 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1556 h.header.n_data_u64s = 1;
1558 /* copy ll address */
1559 clib_memcpy (&h.ethernet_address[0],
1560 eth_if0->address, 6);
1562 vlib_buffer_add_data (vm,
1563 vlib_buffer_get_free_list_index
1564 (p0), bi0, (void *) &h,
1566 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t));
1570 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t);
1573 /* add MTU option */
1574 if (radv_info->adv_link_mtu)
1576 icmp6_neighbor_discovery_mtu_option_t h;
1580 clib_host_to_net_u32 (radv_info->adv_link_mtu);
1581 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu;
1582 h.header.n_data_u64s = 1;
1585 sizeof (icmp6_neighbor_discovery_mtu_option_t);
1587 vlib_buffer_add_data (vm,
1588 vlib_buffer_get_free_list_index
1589 (p0), bi0, (void *) &h,
1591 (icmp6_neighbor_discovery_mtu_option_t));
1594 /* add advertised prefix options */
1595 ip6_radv_prefix_t *pr_info;
1598 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
1600 if(pr_info->enabled &&
1601 (!pr_info->decrement_lifetime_flag
1602 || (pr_info->pref_lifetime_expires >0)))
1604 /* advertise this prefix */
1605 icmp6_neighbor_discovery_prefix_information_option_t h;
1607 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information;
1608 h.header.n_data_u64s = (sizeof(icmp6_neighbor_discovery_prefix_information_option_t) >> 3);
1610 h.dst_address_length = pr_info->prefix_len;
1612 h.flags = (pr_info->adv_on_link_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_FLAG_ON_LINK : 0;
1613 h.flags |= (pr_info->adv_autonomous_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_AUTO : 0;
1615 if(radv_info->cease_radv && pr_info->deprecated_prefix_flag)
1617 h.valid_time = clib_host_to_net_u32(MIN_ADV_VALID_LIFETIME);
1618 h.preferred_time = 0;
1622 if(pr_info->decrement_lifetime_flag)
1624 pr_info->adv_valid_lifetime_in_secs = ((pr_info->valid_lifetime_expires > now)) ?
1625 (pr_info->valid_lifetime_expires - now) : 0;
1627 pr_info->adv_pref_lifetime_in_secs = ((pr_info->pref_lifetime_expires > now)) ?
1628 (pr_info->pref_lifetime_expires - now) : 0;
1631 h.valid_time = clib_host_to_net_u32(pr_info->adv_valid_lifetime_in_secs);
1632 h.preferred_time = clib_host_to_net_u32(pr_info->adv_pref_lifetime_in_secs) ;
1636 clib_memcpy(&h.dst_address, &pr_info->prefix, sizeof(ip6_address_t));
1638 payload_length += sizeof( icmp6_neighbor_discovery_prefix_information_option_t);
1640 vlib_buffer_add_data (vm,
1641 vlib_buffer_get_free_list_index (p0),
1643 (void *)&h, sizeof(icmp6_neighbor_discovery_prefix_information_option_t));
1649 /* add additional options before here */
1651 /* finish building the router advertisement... */
1652 if (!is_unspecified && radv_info->send_unicast)
1654 ip0->dst_address = ip0->src_address;
1658 /* target address is all-nodes mcast addr */
1659 ip6_set_reserved_multicast_address
1661 IP6_MULTICAST_SCOPE_link_local,
1662 IP6_MULTICAST_GROUP_ID_all_hosts);
1665 /* source address MUST be the link-local address */
1666 ip0->src_address = radv_info->link_local_address;
1668 ip0->hop_limit = 255;
1669 ip0->payload_length =
1670 clib_host_to_net_u16 (payload_length);
1672 icmp6_router_advertisement_header_t *rh0 =
1673 (icmp6_router_advertisement_header_t *) (ip0 + 1);
1674 rh0->icmp.checksum =
1675 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1677 ASSERT (bogus_length == 0);
1679 /* setup output if and adjacency */
1680 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1681 vnet_main.local_interface_sw_if_index;
1683 if (is_solicitation)
1685 ethernet_header_t *eth0;
1686 /* Reuse current MAC header, copy SMAC to DMAC and
1687 * interface MAC to SMAC */
1688 vlib_buffer_reset (p0);
1689 eth0 = vlib_buffer_get_current (p0);
1690 clib_memcpy (eth0->dst_address, eth0->src_address,
1692 clib_memcpy (eth0->src_address, eth_if0->address,
1695 is_dropped ? next0 :
1696 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX;
1697 vnet_buffer (p0)->sw_if_index[VLIB_TX] =
1702 adj_index0 = radv_info->mcast_adj_index;
1703 if (adj_index0 == 0)
1704 error0 = ICMP6_ERROR_DST_LOOKUP_MISS;
1708 is_dropped ? next0 :
1709 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW;
1710 vnet_buffer (p0)->ip.adj_index[VLIB_TX] =
1714 p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
1716 radv_info->n_solicitations_dropped += is_dropped;
1717 radv_info->n_solicitations_rcvd += is_solicitation;
1719 if ((error0 == ICMP6_ERROR_NONE) && !is_dropped)
1721 radv_info->n_advertisements_sent++;
1722 n_advertisements_sent++;
1728 p0->error = error_node->errors[error0];
1730 if (error0 != ICMP6_ERROR_NONE)
1731 vlib_error_count (vm, error_node->node_index, error0, 1);
1733 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1734 to_next, n_left_to_next,
1739 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1742 /* Account for router advertisements sent. */
1743 vlib_error_count (vm, error_node->node_index,
1744 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_TX,
1745 n_advertisements_sent);
1747 return frame->n_vectors;
1750 /* validate advertised info for consistancy (see RFC-4861 section 6.2.7) - log any inconsistencies, packet will always be dropped */
1751 static_always_inline uword
1752 icmp6_router_advertisement (vlib_main_t * vm,
1753 vlib_node_runtime_t * node, vlib_frame_t * frame)
1755 vnet_main_t *vnm = vnet_get_main ();
1756 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1757 uword n_packets = frame->n_vectors;
1758 u32 *from, *to_next;
1759 u32 n_left_from, n_left_to_next, next_index;
1760 u32 n_advertisements_rcvd = 0;
1762 vlib_node_runtime_t *error_node =
1763 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1765 from = vlib_frame_vector_args (frame);
1766 n_left_from = n_packets;
1767 next_index = node->cached_next_index;
1769 if (node->flags & VLIB_NODE_FLAG_TRACE)
1770 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1772 sizeof (icmp6_input_trace_t));
1774 while (n_left_from > 0)
1776 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1778 while (n_left_from > 0 && n_left_to_next > 0)
1782 ip6_radv_t *radv_info = 0;
1783 icmp6_router_advertisement_header_t *h0;
1784 u32 bi0, options_len0, sw_if_index0, next0, error0;
1786 bi0 = to_next[0] = from[0];
1791 n_left_to_next -= 1;
1793 p0 = vlib_get_buffer (vm, bi0);
1794 ip0 = vlib_buffer_get_current (p0);
1795 h0 = ip6_next_header (ip0);
1797 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1799 error0 = ICMP6_ERROR_NONE;
1800 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1802 /* Check that source address is link-local */
1803 error0 = (!ip6_address_is_link_local_unicast (&ip0->src_address)) ?
1804 ICMP6_ERROR_ROUTER_ADVERTISEMENT_SOURCE_NOT_LINK_LOCAL : error0;
1806 /* default is to drop */
1807 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1809 n_advertisements_rcvd++;
1811 if (error0 == ICMP6_ERROR_NONE)
1813 vnet_sw_interface_t *sw_if0;
1814 ethernet_interface_t *eth_if0;
1816 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1817 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1819 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1821 /* only support ethernet interface type for now */
1823 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1826 if (error0 == ICMP6_ERROR_NONE)
1830 /* look up the radv_t information for this interface */
1831 vec_validate_init_empty
1832 (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
1834 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1837 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1841 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1844 if (error0 == ICMP6_ERROR_NONE)
1846 /* validate advertised information */
1847 if ((h0->current_hop_limit && radv_info->curr_hop_limit)
1848 && (h0->current_hop_limit !=
1849 radv_info->curr_hop_limit))
1851 ip6_neighbor_syslog (vm, LOG_WARNING,
1852 "our AdvCurHopLimit on %U doesn't agree with %U",
1853 format_vnet_sw_if_index_name,
1860 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP)
1861 != radv_info->adv_managed_flag)
1863 ip6_neighbor_syslog (vm, LOG_WARNING,
1864 "our AdvManagedFlag on %U doesn't agree with %U",
1865 format_vnet_sw_if_index_name,
1872 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP)
1873 != radv_info->adv_other_flag)
1875 ip6_neighbor_syslog (vm, LOG_WARNING,
1876 "our AdvOtherConfigFlag on %U doesn't agree with %U",
1877 format_vnet_sw_if_index_name,
1884 time_in_msec_between_retransmitted_neighbor_solicitations
1886 adv_time_in_msec_between_retransmitted_neighbor_solicitations)
1888 time_in_msec_between_retransmitted_neighbor_solicitations
1890 clib_host_to_net_u32 (radv_info->
1891 adv_time_in_msec_between_retransmitted_neighbor_solicitations)))
1893 ip6_neighbor_syslog (vm, LOG_WARNING,
1894 "our AdvRetransTimer on %U doesn't agree with %U",
1895 format_vnet_sw_if_index_name,
1901 if ((h0->neighbor_reachable_time_in_msec &&
1902 radv_info->adv_neighbor_reachable_time_in_msec) &&
1903 (h0->neighbor_reachable_time_in_msec !=
1904 clib_host_to_net_u32
1905 (radv_info->adv_neighbor_reachable_time_in_msec)))
1907 ip6_neighbor_syslog (vm, LOG_WARNING,
1908 "our AdvReachableTime on %U doesn't agree with %U",
1909 format_vnet_sw_if_index_name,
1915 /* check for MTU or prefix options or .. */
1916 u8 *opt_hdr = (u8 *) (h0 + 1);
1917 while (options_len0 > 0)
1919 icmp6_neighbor_discovery_option_header_t *o0 =
1920 (icmp6_neighbor_discovery_option_header_t *)
1922 int opt_len = o0->n_data_u64s << 3;
1923 icmp6_neighbor_discovery_option_type_t option_type =
1926 if (options_len0 < 2)
1928 ip6_neighbor_syslog (vm, LOG_ERR,
1929 "malformed RA packet on %U from %U",
1930 format_vnet_sw_if_index_name,
1939 ip6_neighbor_syslog (vm, LOG_ERR,
1940 " zero length option in RA on %U from %U",
1941 format_vnet_sw_if_index_name,
1947 else if (opt_len > options_len0)
1949 ip6_neighbor_syslog (vm, LOG_ERR,
1950 "option length in RA packet greater than total length on %U from %U",
1951 format_vnet_sw_if_index_name,
1958 options_len0 -= opt_len;
1961 switch (option_type)
1963 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu:
1965 icmp6_neighbor_discovery_mtu_option_t *h =
1966 (icmp6_neighbor_discovery_mtu_option_t
1969 if (opt_len < sizeof (*h))
1972 if ((h->mtu && radv_info->adv_link_mtu) &&
1974 clib_host_to_net_u32
1975 (radv_info->adv_link_mtu)))
1977 ip6_neighbor_syslog (vm, LOG_WARNING,
1978 "our AdvLinkMTU on %U doesn't agree with %U",
1979 format_vnet_sw_if_index_name,
1987 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information:
1989 icmp6_neighbor_discovery_prefix_information_option_t
1991 (icmp6_neighbor_discovery_prefix_information_option_t
1994 /* validate advertised prefix options */
1995 ip6_radv_prefix_t *pr_info;
1996 u32 preferred, valid;
1998 if (opt_len < sizeof (*h))
2002 clib_net_to_host_u32 (h->preferred_time);
2003 valid = clib_net_to_host_u32 (h->valid_time);
2005 /* look for matching prefix - if we our advertising it, it better be consistant */
2007 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
2011 ip6_address_mask_from_width(&mask, pr_info->prefix_len);
2013 if(pr_info->enabled &&
2014 (pr_info->prefix_len == h->dst_address_length) &&
2015 ip6_address_is_equal_masked (&pr_info->prefix, &h->dst_address, &mask))
2018 if(!pr_info->decrement_lifetime_flag &&
2019 valid != pr_info->adv_valid_lifetime_in_secs)
2021 ip6_neighbor_syslog(vm, LOG_WARNING,
2022 "our ADV validlifetime on %U for %U does not agree with %U",
2023 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
2024 format_ip6_address, &h->dst_address);
2026 if(!pr_info->decrement_lifetime_flag &&
2027 preferred != pr_info->adv_pref_lifetime_in_secs)
2029 ip6_neighbor_syslog(vm, LOG_WARNING,
2030 "our ADV preferredlifetime on %U for %U does not agree with %U",
2031 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
2032 format_ip6_address, &h->dst_address);
2049 p0->error = error_node->errors[error0];
2051 if (error0 != ICMP6_ERROR_NONE)
2052 vlib_error_count (vm, error_node->node_index, error0, 1);
2054 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2055 to_next, n_left_to_next,
2059 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2062 /* Account for router advertisements sent. */
2063 vlib_error_count (vm, error_node->node_index,
2064 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_RX,
2065 n_advertisements_rcvd);
2067 return frame->n_vectors;
2071 * @brief Add a multicast Address to the advertised MLD set
2074 ip6_neighbor_add_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2076 ip6_mldp_group_t *mcast_group_info;
2079 /* lookup mldp info for this interface */
2080 p = mhash_get (&radv_info->address_to_mldp_index, &addr);
2082 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2085 if (!mcast_group_info)
2089 pool_get (radv_info->mldp_group_pool, mcast_group_info);
2091 mi = mcast_group_info - radv_info->mldp_group_pool;
2092 mhash_set (&radv_info->address_to_mldp_index, &addr, mi, /* old_value */
2095 mcast_group_info->type = 4;
2096 mcast_group_info->mcast_source_address_pool = 0;
2097 mcast_group_info->num_sources = 0;
2098 clib_memcpy (&mcast_group_info->mcast_address, &addr,
2099 sizeof (ip6_address_t));
2104 * @brief Delete a multicast Address from the advertised MLD set
2107 ip6_neighbor_del_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2109 ip6_mldp_group_t *mcast_group_info;
2112 p = mhash_get (&radv_info->address_to_mldp_index, &addr);
2114 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2116 if (mcast_group_info)
2118 mhash_unset (&radv_info->address_to_mldp_index, &addr,
2120 pool_put (radv_info->mldp_group_pool, mcast_group_info);
2125 * @brief Add a multicast Address to the advertised MLD set
2128 ip6_neighbor_add_mld_grp (ip6_radv_t * a,
2129 ip6_multicast_address_scope_t scope,
2130 ip6_multicast_link_local_group_id_t group)
2134 ip6_set_reserved_multicast_address (&addr, scope, group);
2136 ip6_neighbor_add_mld_prefix (a, &addr);
2140 * @brief create and initialize router advertisement parameters with default
2141 * values for this intfc
2144 ip6_neighbor_sw_interface_add_del (vnet_main_t * vnm,
2145 u32 sw_if_index, u32 is_add)
2147 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2150 vnet_sw_interface_t *sw_if0;
2151 ethernet_interface_t *eth_if0 = 0;
2153 /* lookup radv container - ethernet interfaces only */
2154 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2155 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2156 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2161 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2163 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2167 a = pool_elt_at_index (nm->if_radv_pool, ri);
2171 ip6_radv_prefix_t *p;
2172 ip6_mldp_group_t *m;
2174 /* release the lock on the interface's mcast adj */
2175 adj_unlock (a->mcast_adj_index);
2177 /* clean up prefix and MDP pools */
2179 pool_flush(p, a->adv_prefixes_pool,
2181 mhash_unset (&a->address_to_prefix_index, &p->prefix, 0);
2183 pool_flush (m, a->mldp_group_pool,
2185 mhash_unset (&a->address_to_mldp_index, &m->mcast_address, 0);
2189 pool_free (a->mldp_group_pool);
2190 pool_free (a->adv_prefixes_pool);
2192 mhash_free (&a->address_to_prefix_index);
2193 mhash_free (&a->address_to_mldp_index);
2195 pool_put (nm->if_radv_pool, a);
2196 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ~0;
2204 vnet_hw_interface_t *hw_if0;
2206 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index);
2208 pool_get (nm->if_radv_pool, a);
2210 ri = a - nm->if_radv_pool;
2211 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ri;
2213 /* initialize default values (most of which are zero) */
2214 memset (a, 0, sizeof (a[0]));
2216 a->sw_if_index = sw_if_index;
2217 a->max_radv_interval = DEF_MAX_RADV_INTERVAL;
2218 a->min_radv_interval = DEF_MIN_RADV_INTERVAL;
2219 a->curr_hop_limit = DEF_CURR_HOP_LIMIT;
2220 a->adv_router_lifetime_in_sec = DEF_DEF_RTR_LIFETIME;
2222 /* send ll address source address option */
2223 a->adv_link_layer_address = 1;
2225 a->min_delay_between_radv = MIN_DELAY_BETWEEN_RAS;
2226 a->max_delay_between_radv = MAX_DELAY_BETWEEN_RAS;
2227 a->max_rtr_default_lifetime = MAX_DEF_RTR_LIFETIME;
2228 a->seed = (u32) clib_cpu_time_now ();
2229 (void) random_u32 (&a->seed);
2230 a->randomizer = clib_cpu_time_now ();
2231 (void) random_u64 (&a->randomizer);
2233 a->initial_adverts_count = MAX_INITIAL_RTR_ADVERTISEMENTS;
2234 a->initial_adverts_sent = a->initial_adverts_count - 1;
2235 a->initial_adverts_interval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
2237 /* deafult is to send */
2240 /* fill in radv_info for this interface that will be needed later */
2241 a->adv_link_mtu = hw_if0->max_l3_packet_bytes[VLIB_RX];
2243 clib_memcpy (a->link_layer_address, eth_if0->address, 6);
2245 /* fill in default link-local address (this may be overridden) */
2246 ip6_link_local_address_from_ethernet_address
2247 (&a->link_local_address, eth_if0->address);
2249 mhash_init (&a->address_to_prefix_index, sizeof (uword),
2250 sizeof (ip6_address_t));
2251 mhash_init (&a->address_to_mldp_index, sizeof (uword),
2252 sizeof (ip6_address_t));
2254 a->mcast_adj_index = adj_mcast_add_or_lock (FIB_PROTOCOL_IP6,
2258 /* add multicast groups we will always be reporting */
2259 ip6_neighbor_add_mld_grp (a,
2260 IP6_MULTICAST_SCOPE_link_local,
2261 IP6_MULTICAST_GROUP_ID_all_hosts);
2262 ip6_neighbor_add_mld_grp (a,
2263 IP6_MULTICAST_SCOPE_link_local,
2264 IP6_MULTICAST_GROUP_ID_all_routers);
2265 ip6_neighbor_add_mld_grp (a,
2266 IP6_MULTICAST_SCOPE_link_local,
2267 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2273 /* send an mldpv2 report */
2275 ip6_neighbor_send_mldpv2_report (u32 sw_if_index)
2277 vnet_main_t *vnm = vnet_get_main ();
2278 vlib_main_t *vm = vnm->vlib_main;
2279 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2280 vnet_sw_interface_t *sw_if0;
2281 ethernet_interface_t *eth_if0;
2285 ip6_radv_t *radv_info;
2295 icmp6_multicast_listener_report_header_t *rh0;
2296 icmp6_multicast_listener_report_packet_t *rp0;
2298 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2299 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
2300 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2302 if (!eth_if0 || !vnet_sw_interface_is_admin_up (vnm, sw_if_index))
2305 /* look up the radv_t information for this interface */
2306 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2309 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2314 /* send report now - build a mldpv2 report packet */
2315 n_allocated = vlib_buffer_alloc_from_free_list (vm,
2318 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2319 if (PREDICT_FALSE (n_allocated == 0))
2321 clib_warning ("buffer allocation failure");
2325 b0 = vlib_get_buffer (vm, bo0);
2327 /* adjust the sizeof the buffer to just include the ipv6 header */
2328 b0->current_length = sizeof (icmp6_multicast_listener_report_packet_t);
2330 payload_length = sizeof (icmp6_multicast_listener_report_header_t);
2332 b0->error = ICMP6_ERROR_NONE;
2334 rp0 = vlib_buffer_get_current (b0);
2335 ip0 = (ip6_header_t *) & rp0->ip;
2336 rh0 = (icmp6_multicast_listener_report_header_t *) & rp0->report_hdr;
2338 memset (rp0, 0x0, sizeof (icmp6_multicast_listener_report_packet_t));
2340 ip0->ip_version_traffic_class_and_flow_label =
2341 clib_host_to_net_u32 (0x6 << 28);
2343 ip0->protocol = IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS;
2344 /* for DEBUG - vnet driver won't seem to emit router alerts */
2345 /* ip0->protocol = IP_PROTOCOL_ICMP6; */
2348 rh0->icmp.type = ICMP6_multicast_listener_report_v2;
2350 /* source address MUST be the link-local address */
2351 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2352 ip0->src_address = radv_info->link_local_address;
2354 /* destination is all mldpv2 routers */
2355 ip6_set_reserved_multicast_address (&ip0->dst_address,
2356 IP6_MULTICAST_SCOPE_link_local,
2357 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2359 /* add reports here */
2360 ip6_mldp_group_t *m;
2361 int num_addr_records = 0;
2362 icmp6_multicast_address_record_t rr;
2364 /* fill in the hop-by-hop extension header (router alert) info */
2365 rh0->ext_hdr.next_hdr = IP_PROTOCOL_ICMP6;
2366 rh0->ext_hdr.n_data_u64s = 0;
2368 rh0->alert.type = IP6_MLDP_ALERT_TYPE;
2370 rh0->alert.value = 0;
2375 rh0->icmp.checksum = 0;
2378 pool_foreach (m, radv_info->mldp_group_pool,
2381 rr.aux_data_len_u32s = 0;
2382 rr.num_sources = clib_host_to_net_u16 (m->num_sources);
2383 clib_memcpy(&rr.mcast_addr, &m->mcast_address, sizeof(ip6_address_t));
2387 vlib_buffer_add_data
2388 (vm, vlib_buffer_get_free_list_index (b0), bo0,
2389 (void *)&rr, sizeof(icmp6_multicast_address_record_t));
2391 payload_length += sizeof( icmp6_multicast_address_record_t);
2396 rh0->num_addr_records = clib_host_to_net_u16 (num_addr_records);
2398 /* update lengths */
2399 ip0->payload_length = clib_host_to_net_u16 (payload_length);
2401 rh0->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0,
2403 ASSERT (bogus_length == 0);
2406 * OK to override w/ no regard for actual FIB, because
2407 * ip6-rewrite only looks at the adjacency.
2409 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
2410 vnet_main.local_interface_sw_if_index;
2412 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
2413 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
2415 vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite-mcast");
2417 f = vlib_get_frame_to_node (vm, node->index);
2418 to_next = vlib_frame_vector_args (f);
2422 vlib_put_frame_to_node (vm, node->index, f);
2427 VLIB_REGISTER_NODE (ip6_icmp_router_solicitation_node,static) =
2429 .function = icmp6_router_solicitation,
2430 .name = "icmp6-router-solicitation",
2432 .vector_size = sizeof (u32),
2434 .format_trace = format_icmp6_input_trace,
2436 .n_next_nodes = ICMP6_ROUTER_SOLICITATION_N_NEXT,
2438 [ICMP6_ROUTER_SOLICITATION_NEXT_DROP] = "error-drop",
2439 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW] = "ip6-rewrite-mcast",
2440 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX] = "interface-output",
2445 /* send a RA or update the timer info etc.. */
2447 ip6_neighbor_process_timer_event (vlib_main_t * vm,
2448 vlib_node_runtime_t * node,
2449 vlib_frame_t * frame)
2451 vnet_main_t *vnm = vnet_get_main ();
2452 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2453 ip6_radv_t *radv_info;
2454 vlib_frame_t *f = 0;
2455 u32 n_this_frame = 0;
2456 u32 n_left_to_next = 0;
2459 icmp6_router_solicitation_header_t *h0;
2461 f64 now = vlib_time_now (vm);
2463 /* Interface ip6 radv info list */
2465 pool_foreach (radv_info, nm->if_radv_pool,
2467 if( !vnet_sw_interface_is_admin_up (vnm, radv_info->sw_if_index))
2469 radv_info->initial_adverts_sent = radv_info->initial_adverts_count-1;
2470 radv_info->next_multicast_time = now;
2471 radv_info->last_multicast_time = now;
2472 radv_info->last_radv_time = 0;
2473 radv_info->all_routers_mcast = 0;
2477 /* Make sure that we've joined the all-routers multicast group */
2478 if(!radv_info->all_routers_mcast)
2480 /* send MDLP_REPORT_EVENT message */
2481 ip6_neighbor_send_mldpv2_report(radv_info->sw_if_index);
2482 radv_info->all_routers_mcast = 1;
2485 /* is it time to send a multicast RA on this interface? */
2486 if(radv_info->send_radv && (now >= radv_info->next_multicast_time))
2491 f64 rfn = (radv_info->max_radv_interval - radv_info->min_radv_interval) *
2492 random_f64 (&radv_info->seed) + radv_info->min_radv_interval;
2494 /* multicast send - compute next multicast send time */
2495 if( radv_info->initial_adverts_sent > 0)
2497 radv_info->initial_adverts_sent--;
2498 if(rfn > radv_info-> initial_adverts_interval)
2499 rfn = radv_info-> initial_adverts_interval;
2501 /* check to see if we are ceasing to send */
2502 if( radv_info->initial_adverts_sent == 0)
2503 if(radv_info->cease_radv)
2504 radv_info->send_radv = 0;
2507 radv_info->next_multicast_time = rfn + now;
2508 radv_info->last_multicast_time = now;
2510 /* send advert now - build a "solicted" router advert with unspecified source address */
2511 n_allocated = vlib_buffer_alloc_from_free_list
2512 (vm, &bo0, n_to_alloc, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2514 if (PREDICT_FALSE(n_allocated == 0))
2516 clib_warning ("buffer allocation failure");
2519 b0 = vlib_get_buffer (vm, bo0);
2520 b0->current_length = sizeof( icmp6_router_solicitation_header_t);
2521 b0->error = ICMP6_ERROR_NONE;
2522 vnet_buffer (b0)->sw_if_index[VLIB_RX] = radv_info->sw_if_index;
2524 h0 = vlib_buffer_get_current (b0);
2526 memset (h0, 0, sizeof (icmp6_router_solicitation_header_t));
2528 h0->ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2529 h0->ip.payload_length = clib_host_to_net_u16 (sizeof (icmp6_router_solicitation_header_t)
2530 - STRUCT_OFFSET_OF (icmp6_router_solicitation_header_t, neighbor));
2531 h0->ip.protocol = IP_PROTOCOL_ICMP6;
2532 h0->ip.hop_limit = 255;
2534 /* set src/dst address as "unspecified" this marks this packet as internally generated rather than recieved */
2535 h0->ip.src_address.as_u64[0] = 0;
2536 h0->ip.src_address.as_u64[1] = 0;
2538 h0->ip.dst_address.as_u64[0] = 0;
2539 h0->ip.dst_address.as_u64[1] = 0;
2541 h0->neighbor.icmp.type = ICMP6_router_solicitation;
2543 if (PREDICT_FALSE(f == 0))
2545 f = vlib_get_frame_to_node (vm, ip6_icmp_router_solicitation_node.index);
2546 to_next = vlib_frame_vector_args (f);
2547 n_left_to_next = VLIB_FRAME_SIZE;
2556 if (PREDICT_FALSE(n_left_to_next == 0))
2558 f->n_vectors = n_this_frame;
2559 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2568 ASSERT (n_this_frame);
2569 f->n_vectors = n_this_frame;
2570 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2576 ip6_icmp_neighbor_discovery_event_process (vlib_main_t * vm,
2577 vlib_node_runtime_t * node,
2578 vlib_frame_t * frame)
2581 ip6_icmp_neighbor_discovery_event_data_t *event_data;
2583 /* init code here */
2587 vlib_process_wait_for_event_or_clock (vm, 1. /* seconds */ );
2589 event_data = vlib_process_get_event_data (vm, &event_type);
2593 /* No events found: timer expired. */
2594 /* process interface list and send RAs as appropriate, update timer info */
2595 ip6_neighbor_process_timer_event (vm, node, frame);
2602 case ICMP6_ND_EVENT_INIT:
2613 _vec_len (event_data) = 0;
2616 return frame->n_vectors;
2620 VLIB_REGISTER_NODE (ip6_icmp_router_advertisement_node,static) =
2622 .function = icmp6_router_advertisement,
2623 .name = "icmp6-router-advertisement",
2625 .vector_size = sizeof (u32),
2627 .format_trace = format_icmp6_input_trace,
2636 vlib_node_registration_t ip6_icmp_neighbor_discovery_event_node = {
2638 .function = ip6_icmp_neighbor_discovery_event_process,
2639 .name = "ip6-icmp-neighbor-discovery-event-process",
2640 .type = VLIB_NODE_TYPE_PROCESS,
2644 icmp6_neighbor_solicitation (vlib_main_t * vm,
2645 vlib_node_runtime_t * node, vlib_frame_t * frame)
2647 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
2648 /* is_solicitation */
2653 icmp6_neighbor_advertisement (vlib_main_t * vm,
2654 vlib_node_runtime_t * node,
2655 vlib_frame_t * frame)
2657 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
2658 /* is_solicitation */
2663 VLIB_REGISTER_NODE (ip6_icmp_neighbor_solicitation_node,static) =
2665 .function = icmp6_neighbor_solicitation,
2666 .name = "icmp6-neighbor-solicitation",
2668 .vector_size = sizeof (u32),
2670 .format_trace = format_icmp6_input_trace,
2672 .n_next_nodes = ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
2674 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP] = "error-drop",
2675 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY] = "interface-output",
2681 VLIB_REGISTER_NODE (ip6_icmp_neighbor_advertisement_node,static) =
2683 .function = icmp6_neighbor_advertisement,
2684 .name = "icmp6-neighbor-advertisement",
2686 .vector_size = sizeof (u32),
2688 .format_trace = format_icmp6_input_trace,
2697 /* API support functions */
2699 ip6_neighbor_ra_config (vlib_main_t * vm, u32 sw_if_index,
2700 u8 suppress, u8 managed, u8 other,
2701 u8 ll_option, u8 send_unicast, u8 cease,
2702 u8 use_lifetime, u32 lifetime,
2703 u32 initial_count, u32 initial_interval,
2704 u32 max_interval, u32 min_interval, u8 is_no)
2706 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2710 /* look up the radv_t information for this interface */
2711 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2713 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2714 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
2719 ip6_radv_t *radv_info;
2720 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2722 if ((max_interval != 0) && (min_interval == 0))
2723 min_interval = .75 * max_interval;
2727 0) ? ((is_no) ? DEF_MAX_RADV_INTERVAL : max_interval) :
2728 radv_info->max_radv_interval;
2731 0) ? ((is_no) ? DEF_MIN_RADV_INTERVAL : min_interval) :
2732 radv_info->min_radv_interval;
2735 0) ? ((is_no) ? DEF_DEF_RTR_LIFETIME : lifetime) :
2736 radv_info->adv_router_lifetime_in_sec;
2740 if (lifetime > MAX_DEF_RTR_LIFETIME)
2741 lifetime = MAX_DEF_RTR_LIFETIME;
2743 if (lifetime <= max_interval)
2744 return VNET_API_ERROR_INVALID_VALUE;
2747 if (min_interval != 0)
2749 if ((min_interval > .75 * max_interval) || (min_interval < 3))
2750 return VNET_API_ERROR_INVALID_VALUE;
2753 if ((initial_count > MAX_INITIAL_RTR_ADVERTISEMENTS) ||
2754 (initial_interval > MAX_INITIAL_RTR_ADVERT_INTERVAL))
2755 return VNET_API_ERROR_INVALID_VALUE;
2758 if "flag" is set and is_no is true then restore default value else set value corresponding to "flag"
2759 if "flag" is clear don't change corresponding value
2761 radv_info->send_radv =
2762 (suppress != 0) ? ((is_no != 0) ? 1 : 0) : radv_info->send_radv;
2763 radv_info->adv_managed_flag =
2764 (managed != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_managed_flag;
2765 radv_info->adv_other_flag =
2766 (other != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_other_flag;
2767 radv_info->adv_link_layer_address =
2769 0) ? ((is_no) ? 1 : 0) : radv_info->adv_link_layer_address;
2770 radv_info->send_unicast =
2771 (send_unicast != 0) ? ((is_no) ? 0 : 1) : radv_info->send_unicast;
2772 radv_info->cease_radv =
2773 (cease != 0) ? ((is_no) ? 0 : 1) : radv_info->cease_radv;
2775 radv_info->min_radv_interval = min_interval;
2776 radv_info->max_radv_interval = max_interval;
2777 radv_info->adv_router_lifetime_in_sec = lifetime;
2779 radv_info->initial_adverts_count =
2781 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERTISEMENTS : initial_count) :
2782 radv_info->initial_adverts_count;
2783 radv_info->initial_adverts_interval =
2784 (initial_interval !=
2785 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERT_INTERVAL : initial_interval) :
2786 radv_info->initial_adverts_interval;
2789 if ((cease != 0) && (is_no))
2790 radv_info->send_radv = 1;
2792 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
2793 radv_info->next_multicast_time = vlib_time_now (vm);
2794 radv_info->last_multicast_time = vlib_time_now (vm);
2795 radv_info->last_radv_time = 0;
2801 ip6_neighbor_ra_prefix (vlib_main_t * vm, u32 sw_if_index,
2802 ip6_address_t * prefix_addr, u8 prefix_len,
2803 u8 use_default, u32 val_lifetime, u32 pref_lifetime,
2804 u8 no_advertise, u8 off_link, u8 no_autoconfig,
2805 u8 no_onlink, u8 is_no)
2807 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2812 /* look up the radv_t information for this interface */
2813 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2816 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2818 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
2822 f64 now = vlib_time_now (vm);
2823 ip6_radv_t *radv_info;
2824 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2826 /* prefix info add, delete or update */
2827 ip6_radv_prefix_t *prefix;
2829 /* lookup prefix info for this address on this interface */
2830 uword *p = mhash_get (&radv_info->address_to_prefix_index, prefix_addr);
2832 prefix = p ? pool_elt_at_index (radv_info->adv_prefixes_pool, p[0]) : 0;
2838 return VNET_API_ERROR_INVALID_VALUE; /* invalid prefix */
2840 if (prefix->prefix_len != prefix_len)
2841 return VNET_API_ERROR_INVALID_VALUE_2;
2843 /* FIXME - Should the DP do this or the CP ? */
2844 /* do specific delete processing here before returning */
2845 /* try to remove from routing table */
2847 mhash_unset (&radv_info->address_to_prefix_index, prefix_addr,
2849 pool_put (radv_info->adv_prefixes_pool, prefix);
2851 radv_info->initial_adverts_sent =
2852 radv_info->initial_adverts_count - 1;
2853 radv_info->next_multicast_time = vlib_time_now (vm);
2854 radv_info->last_multicast_time = vlib_time_now (vm);
2855 radv_info->last_radv_time = 0;
2859 /* adding or changing */
2864 pool_get (radv_info->adv_prefixes_pool, prefix);
2865 pi = prefix - radv_info->adv_prefixes_pool;
2866 mhash_set (&radv_info->address_to_prefix_index, prefix_addr, pi,
2869 memset (prefix, 0x0, sizeof (ip6_radv_prefix_t));
2871 prefix->prefix_len = prefix_len;
2872 clib_memcpy (&prefix->prefix, prefix_addr, sizeof (ip6_address_t));
2874 /* initialize default values */
2875 prefix->adv_on_link_flag = 1; /* L bit set */
2876 prefix->adv_autonomous_flag = 1; /* A bit set */
2877 prefix->adv_valid_lifetime_in_secs = DEF_ADV_VALID_LIFETIME;
2878 prefix->adv_pref_lifetime_in_secs = DEF_ADV_PREF_LIFETIME;
2879 prefix->enabled = 1;
2880 prefix->decrement_lifetime_flag = 1;
2881 prefix->deprecated_prefix_flag = 1;
2885 /* FIXME - Should the DP do this or the CP ? */
2886 /* insert prefix into routing table as a connected prefix */
2895 if (prefix->prefix_len != prefix_len)
2896 return VNET_API_ERROR_INVALID_VALUE_2;
2900 /* FIXME - Should the DP do this or the CP ? */
2901 /* remove from routing table if already there */
2905 if ((val_lifetime == ~0) || (pref_lifetime == ~0))
2907 prefix->adv_valid_lifetime_in_secs = ~0;
2908 prefix->adv_pref_lifetime_in_secs = ~0;
2909 prefix->decrement_lifetime_flag = 0;
2913 prefix->adv_valid_lifetime_in_secs = val_lifetime;;
2914 prefix->adv_pref_lifetime_in_secs = pref_lifetime;
2917 /* copy remaining */
2918 prefix->enabled = !(no_advertise != 0);
2919 prefix->adv_on_link_flag = !((off_link != 0) || (no_onlink != 0));
2920 prefix->adv_autonomous_flag = !(no_autoconfig != 0);
2924 /* fill in the expiration times */
2925 prefix->valid_lifetime_expires =
2926 now + prefix->adv_valid_lifetime_in_secs;
2927 prefix->pref_lifetime_expires = now + prefix->adv_pref_lifetime_in_secs;
2929 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
2930 radv_info->next_multicast_time = vlib_time_now (vm);
2931 radv_info->last_multicast_time = vlib_time_now (vm);
2932 radv_info->last_radv_time = 0;
2938 ip6_neighbor_cmd (vlib_main_t * vm, unformat_input_t * main_input,
2939 vlib_cli_command_t * cmd)
2941 vnet_main_t *vnm = vnet_get_main ();
2942 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2943 clib_error_t *error = 0;
2945 u8 suppress = 0, managed = 0, other = 0;
2946 u8 suppress_ll_option = 0, send_unicast = 0, cease = 0;
2947 u8 use_lifetime = 0;
2948 u32 sw_if_index, ra_lifetime = 0, ra_initial_count =
2949 0, ra_initial_interval = 0;
2950 u32 ra_max_interval = 0, ra_min_interval = 0;
2952 unformat_input_t _line_input, *line_input = &_line_input;
2953 vnet_sw_interface_t *sw_if0;
2955 int add_radv_info = 1;
2956 __attribute__ ((unused)) ip6_radv_t *radv_info = 0;
2957 ip6_address_t ip6_addr;
2961 /* Get a line of input. */
2962 if (!unformat_user (main_input, unformat_line_input, line_input))
2965 /* get basic radv info for this interface */
2966 if (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2969 if (unformat_user (line_input,
2970 unformat_vnet_sw_interface, vnm, &sw_if_index))
2973 ethernet_interface_t *eth_if0 = 0;
2975 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2976 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2978 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2983 clib_error_return (0, "Interface must be of ethernet type");
2987 /* look up the radv_t information for this interface */
2988 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
2991 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2995 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2999 error = clib_error_return (0, "unknown interface %U'",
3000 format_unformat_error, line_input);
3006 error = clib_error_return (0, "invalid interface name %U'",
3007 format_unformat_error, line_input);
3012 /* get the rest of the command */
3013 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3015 if (unformat (line_input, "no"))
3017 else if (unformat (line_input, "prefix %U/%d",
3018 unformat_ip6_address, &ip6_addr, &addr_len))
3023 else if (unformat (line_input, "ra-managed-config-flag"))
3028 else if (unformat (line_input, "ra-other-config-flag"))
3033 else if (unformat (line_input, "ra-suppress") ||
3034 unformat (line_input, "ra-surpress"))
3039 else if (unformat (line_input, "ra-suppress-link-layer") ||
3040 unformat (line_input, "ra-surpress-link-layer"))
3042 suppress_ll_option = 1;
3045 else if (unformat (line_input, "ra-send-unicast"))
3050 else if (unformat (line_input, "ra-lifetime"))
3052 if (!unformat (line_input, "%d", &ra_lifetime))
3054 error = unformat_parse_error (line_input);
3060 else if (unformat (line_input, "ra-initial"))
3063 (line_input, "%d %d", &ra_initial_count, &ra_initial_interval))
3065 error = unformat_parse_error (line_input);
3070 else if (unformat (line_input, "ra-interval"))
3072 if (!unformat (line_input, "%d", &ra_max_interval))
3074 error = unformat_parse_error (line_input);
3078 if (!unformat (line_input, "%d", &ra_min_interval))
3079 ra_min_interval = 0;
3082 else if (unformat (line_input, "ra-cease"))
3089 error = unformat_parse_error (line_input);
3096 ip6_neighbor_ra_config (vm, sw_if_index,
3097 suppress, managed, other,
3098 suppress_ll_option, send_unicast, cease,
3099 use_lifetime, ra_lifetime,
3100 ra_initial_count, ra_initial_interval,
3101 ra_max_interval, ra_min_interval, is_no);
3105 u32 valid_lifetime_in_secs = 0;
3106 u32 pref_lifetime_in_secs = 0;
3107 u8 use_prefix_default_values = 0;
3108 u8 no_advertise = 0;
3110 u8 no_autoconfig = 0;
3113 /* get the rest of the command */
3114 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3116 if (unformat (line_input, "default"))
3118 use_prefix_default_values = 1;
3121 else if (unformat (line_input, "infinite"))
3123 valid_lifetime_in_secs = ~0;
3124 pref_lifetime_in_secs = ~0;
3127 else if (unformat (line_input, "%d %d", &valid_lifetime_in_secs,
3128 &pref_lifetime_in_secs))
3135 /* get the rest of the command */
3136 while (!use_prefix_default_values &&
3137 unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3139 if (unformat (line_input, "no-advertise"))
3141 else if (unformat (line_input, "off-link"))
3143 else if (unformat (line_input, "no-autoconfig"))
3145 else if (unformat (line_input, "no-onlink"))
3149 error = unformat_parse_error (line_input);
3154 ip6_neighbor_ra_prefix (vm, sw_if_index,
3155 &ip6_addr, addr_len,
3156 use_prefix_default_values,
3157 valid_lifetime_in_secs,
3158 pref_lifetime_in_secs,
3160 off_link, no_autoconfig, no_onlink, is_no);
3164 unformat_free (line_input);
3170 ip6_print_addrs (vlib_main_t * vm, u32 * addrs)
3172 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3175 for (i = 0; i < vec_len (addrs); i++)
3177 ip_interface_address_t *a =
3178 pool_elt_at_index (lm->if_address_pool, addrs[i]);
3179 ip6_address_t *address = ip_interface_address_get_address (lm, a);
3181 vlib_cli_output (vm, "\t\t%U/%d",
3182 format_ip6_address, address, a->address_length);
3186 static clib_error_t *
3187 show_ip6_interface_cmd (vlib_main_t * vm,
3188 unformat_input_t * input, vlib_cli_command_t * cmd)
3190 vnet_main_t *vnm = vnet_get_main ();
3191 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3192 clib_error_t *error = 0;
3197 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3201 /* look up the radv_t information for this interface */
3202 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3205 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3209 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3210 ip6_radv_t *radv_info;
3211 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3213 vlib_cli_output (vm, "%U is admin %s\n",
3214 format_vnet_sw_interface_name, vnm,
3215 vnet_get_sw_interface (vnm, sw_if_index),
3216 (vnet_sw_interface_is_admin_up (vnm, sw_if_index) ?
3220 u32 *link_scope = 0, *global_scope = 0;
3221 u32 *local_scope = 0, *unknown_scope = 0;
3222 ip_interface_address_t *a;
3224 vec_validate_init_empty (lm->if_address_pool_index_by_sw_if_index,
3226 ai = lm->if_address_pool_index_by_sw_if_index[sw_if_index];
3228 while (ai != (u32) ~ 0)
3230 a = pool_elt_at_index (lm->if_address_pool, ai);
3231 ip6_address_t *address =
3232 ip_interface_address_get_address (lm, a);
3234 if (ip6_address_is_link_local_unicast (address))
3235 vec_add1 (link_scope, ai);
3236 else if (ip6_address_is_global_unicast (address))
3237 vec_add1 (global_scope, ai);
3238 else if (ip6_address_is_local_unicast (address))
3239 vec_add1 (local_scope, ai);
3241 vec_add1 (unknown_scope, ai);
3243 ai = a->next_this_sw_interface;
3246 if (vec_len (link_scope))
3248 vlib_cli_output (vm, "\tLink-local address(es):\n");
3249 ip6_print_addrs (vm, link_scope);
3250 vec_free (link_scope);
3253 if (vec_len (local_scope))
3255 vlib_cli_output (vm, "\tLocal unicast address(es):\n");
3256 ip6_print_addrs (vm, local_scope);
3257 vec_free (local_scope);
3260 if (vec_len (global_scope))
3262 vlib_cli_output (vm, "\tGlobal unicast address(es):\n");
3263 ip6_print_addrs (vm, global_scope);
3264 vec_free (global_scope);
3267 if (vec_len (unknown_scope))
3269 vlib_cli_output (vm, "\tOther-scope address(es):\n");
3270 ip6_print_addrs (vm, unknown_scope);
3271 vec_free (unknown_scope);
3274 vlib_cli_output (vm, "\tJoined group address(es):\n");
3275 ip6_mldp_group_t *m;
3277 pool_foreach (m, radv_info->mldp_group_pool,
3279 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
3284 vlib_cli_output (vm, "\tAdvertised Prefixes:\n");
3285 ip6_radv_prefix_t *p;
3287 pool_foreach (p, radv_info->adv_prefixes_pool,
3289 vlib_cli_output (vm, "\t\tprefix %U, length %d\n",
3290 format_ip6_address, &p->prefix, p->prefix_len);
3294 vlib_cli_output (vm, "\tMTU is %d\n", radv_info->adv_link_mtu);
3295 vlib_cli_output (vm, "\tICMP error messages are unlimited\n");
3296 vlib_cli_output (vm, "\tICMP redirects are disabled\n");
3297 vlib_cli_output (vm, "\tICMP unreachables are not sent\n");
3298 vlib_cli_output (vm, "\tND DAD is disabled\n");
3299 //vlib_cli_output (vm, "\tND reachable time is %d milliseconds\n",);
3300 vlib_cli_output (vm, "\tND advertised reachable time is %d\n",
3301 radv_info->adv_neighbor_reachable_time_in_msec);
3302 vlib_cli_output (vm,
3303 "\tND advertised retransmit interval is %d (msec)\n",
3305 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
3307 u32 ra_interval = radv_info->max_radv_interval;
3308 u32 ra_interval_min = radv_info->min_radv_interval;
3309 vlib_cli_output (vm,
3310 "\tND router advertisements are sent every %d seconds (min interval is %d)\n",
3311 ra_interval, ra_interval_min);
3312 vlib_cli_output (vm,
3313 "\tND router advertisements live for %d seconds\n",
3314 radv_info->adv_router_lifetime_in_sec);
3315 vlib_cli_output (vm,
3316 "\tHosts %s stateless autoconfig for addresses\n",
3317 (radv_info->adv_managed_flag) ? "use" :
3319 vlib_cli_output (vm, "\tND router advertisements sent %d\n",
3320 radv_info->n_advertisements_sent);
3321 vlib_cli_output (vm, "\tND router solicitations received %d\n",
3322 radv_info->n_solicitations_rcvd);
3323 vlib_cli_output (vm, "\tND router solicitations dropped %d\n",
3324 radv_info->n_solicitations_dropped);
3328 error = clib_error_return (0, "IPv6 not enabled on interface",
3329 format_unformat_error, input);
3337 * This command is used to display various IPv6 attributes on a given
3341 * Example of how to display IPv6 settings:
3342 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
3343 * GigabitEthernet2/0/0 is admin up
3344 * Link-local address(es):
3346 * Joined group address(es):
3351 * Advertised Prefixes:
3352 * prefix fe80::fe:28ff:fe9c:75b3, length 64
3354 * ICMP error messages are unlimited
3355 * ICMP redirects are disabled
3356 * ICMP unreachables are not sent
3357 * ND DAD is disabled
3358 * ND advertised reachable time is 0
3359 * ND advertised retransmit interval is 0 (msec)
3360 * ND router advertisements are sent every 200 seconds (min interval is 150)
3361 * ND router advertisements live for 600 seconds
3362 * Hosts use stateless autoconfig for addresses
3363 * ND router advertisements sent 19336
3364 * ND router solicitations received 0
3365 * ND router solicitations dropped 0
3367 * Example of output if IPv6 is not enabled on the interface:
3368 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
3369 * show ip6 interface: IPv6 not enabled on interface
3373 VLIB_CLI_COMMAND (show_ip6_interface_command, static) =
3375 .path = "show ip6 interface",
3376 .function = show_ip6_interface_cmd,
3377 .short_help = "show ip6 interface <interface>",
3382 disable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
3384 clib_error_t *error = 0;
3385 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3388 /* look up the radv_t information for this interface */
3389 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3391 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3393 /* if not created - do nothing */
3396 vnet_main_t *vnm = vnet_get_main ();
3397 ip6_radv_t *radv_info;
3399 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3401 /* check radv_info ref count for other ip6 addresses on this interface */
3402 /* This implicitly excludes the link local address */
3403 if (radv_info->ref_count == 0)
3405 /* essentially "disables" ipv6 on this interface */
3406 error = ip6_add_del_interface_address (vm, sw_if_index,
3408 link_local_address, 128,
3411 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index,
3413 ip6_mfib_interface_enable_disable (sw_if_index, 0);
3420 ip6_interface_enabled (vlib_main_t * vm, u32 sw_if_index)
3422 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3425 /* look up the radv_t information for this interface */
3426 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3429 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3435 enable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
3437 clib_error_t *error = 0;
3438 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3442 /* look up the radv_t information for this interface */
3443 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3446 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3448 /* if not created yet */
3451 vnet_main_t *vnm = vnet_get_main ();
3452 vnet_sw_interface_t *sw_if0;
3454 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
3455 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
3457 ethernet_interface_t *eth_if0;
3460 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
3463 /* create radv_info. for this interface. This holds all the info needed for router adverts */
3465 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, is_add);
3469 ip6_radv_t *radv_info;
3470 ip6_address_t link_local_address;
3472 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3474 ip6_link_local_address_from_ethernet_mac_address
3475 (&link_local_address, eth_if0->address);
3477 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index);
3478 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_SUB ||
3479 sw_if0->type == VNET_SW_INTERFACE_TYPE_P2P)
3481 /* make up an interface id */
3485 link_local_address.as_u64[0] = radv_info->randomizer;
3488 md5_add (&m, &link_local_address, 16);
3489 md5_finish (&m, digest);
3491 clib_memcpy (&link_local_address, digest, 16);
3493 radv_info->randomizer = link_local_address.as_u64[0];
3495 link_local_address.as_u64[0] =
3496 clib_host_to_net_u64 (0xFE80000000000000ULL);
3498 link_local_address.as_u8[8] &= 0xfd;
3501 ip6_mfib_interface_enable_disable (sw_if_index, 1);
3503 /* essentially "enables" ipv6 on this interface */
3504 error = ip6_add_del_interface_address (vm, sw_if_index,
3505 &link_local_address,
3507 /* address width */ ,
3511 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index,
3515 radv_info->link_local_address = link_local_address;
3524 static clib_error_t *
3525 enable_ip6_interface_cmd (vlib_main_t * vm,
3526 unformat_input_t * input, vlib_cli_command_t * cmd)
3528 vnet_main_t *vnm = vnet_get_main ();
3529 clib_error_t *error = 0;
3534 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3536 enable_ip6_interface (vm, sw_if_index);
3540 error = clib_error_return (0, "unknown interface\n'",
3541 format_unformat_error, input);
3548 * This command is used to enable IPv6 on a given interface.
3551 * Example of how enable IPv6 on a given interface:
3552 * @cliexcmd{enable ip6 interface GigabitEthernet2/0/0}
3555 VLIB_CLI_COMMAND (enable_ip6_interface_command, static) =
3557 .path = "enable ip6 interface",
3558 .function = enable_ip6_interface_cmd,
3559 .short_help = "enable ip6 interface <interface>",
3563 static clib_error_t *
3564 disable_ip6_interface_cmd (vlib_main_t * vm,
3565 unformat_input_t * input, vlib_cli_command_t * cmd)
3567 vnet_main_t *vnm = vnet_get_main ();
3568 clib_error_t *error = 0;
3573 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3575 error = disable_ip6_interface (vm, sw_if_index);
3579 error = clib_error_return (0, "unknown interface\n'",
3580 format_unformat_error, input);
3587 * This command is used to disable IPv6 on a given interface.
3590 * Example of how disable IPv6 on a given interface:
3591 * @cliexcmd{disable ip6 interface GigabitEthernet2/0/0}
3594 VLIB_CLI_COMMAND (disable_ip6_interface_command, static) =
3596 .path = "disable ip6 interface",
3597 .function = disable_ip6_interface_cmd,
3598 .short_help = "disable ip6 interface <interface>",
3603 * This command is used to configure the neighbor discovery
3604 * parameters on a given interface. Use the '<em>show ip6 interface</em>'
3605 * command to display some of the current neighbor discovery parameters
3606 * on a given interface. This command has three formats:
3609 * <b>Format 1 - Router Advertisement Options:</b> (Only one can be entered in a single command)
3611 * '<em><b>ip6 nd <interface> [no] [ra-managed-config-flag] | [ra-other-config-flag] | [ra-suppress] | [ra-suppress-link-layer] | [ra-send-unicast] | [ra-lifetime <lifetime>] | [ra-initial <cnt> <interval>] | [ra-interval <max-interval> [<min-interval>]] | [ra-cease]</b></em>'
3615 * <em>[no] ra-managed-config-flag</em> - Advertises in ICMPv6
3616 * router-advertisement messages to use stateful address
3617 * auto-configuration to obtain address information (sets the M-bit).
3618 * Default is the M-bit is not set and the '<em>no</em>' option
3619 * returns it to this default state.
3621 * <em>[no] ra-other-config-flag</em> - Indicates in ICMPv6
3622 * router-advertisement messages that hosts use stateful auto
3623 * configuration to obtain nonaddress related information (sets
3624 * the O-bit). Default is the O-bit is not set and the '<em>no</em>'
3625 * option returns it to this default state.
3627 * <em>[no] ra-suppress</em> - Disables sending ICMPv6 router-advertisement
3628 * messages. The '<em>no</em>' option implies to enable sending ICMPv6
3629 * router-advertisement messages.
3631 * <em>[no] ra-suppress-link-layer</em> - Indicates not to include the
3632 * optional source link-layer address in the ICMPv6 router-advertisement
3633 * messages. Default is to include the optional source link-layer address
3634 * and the '<em>no</em>' option returns it to this default state.
3636 * <em>[no] ra-send-unicast</em> - Use the source address of the
3637 * router-solicitation message if availiable. The default is to use
3638 * multicast address of all nodes, and the '<em>no</em>' option returns
3639 * it to this default state.
3641 * <em>[no] ra-lifetime <lifetime></em> - Advertises the lifetime of a
3642 * default router in ICMPv6 router-advertisement messages. The range is
3643 * from 0 to 9000 seconds. '<em><lifetime></em>' must be greater than
3644 * '<em><max-interval></em>'. The default value is 600 seconds and the
3645 * '<em>no</em>' option returns it to this default value.
3647 * <em>[no] ra-initial <cnt> <interval></em> - Number of initial ICMPv6
3648 * router-advertisement messages sent and the interval between each
3649 * message. Range for count is 1 - 3 and default is 3. Range for interval
3650 * is 1 to 16 seconds, and default is 16 seconds. The '<em>no</em>' option
3651 * returns both to their default value.
3653 * <em>[no] ra-interval <max-interval> [<min-interval>]</em> - Configures the
3654 * interval between sending ICMPv6 router-advertisement messages. The
3655 * range for max-interval is from 4 to 200 seconds. min-interval can not
3656 * be more than 75% of max-interval. If not set, min-interval will be
3657 * set to 75% of max-interval. The range for min-interval is from 3 to
3658 * 150 seconds. The '<em>no</em>' option returns both to their default
3661 * <em>[no] ra-cease</em> - Cease sending ICMPv6 router-advertisement messages.
3662 * The '<em>no</em>' options implies to start (or restart) sending
3663 * ICMPv6 router-advertisement messages.
3666 * <b>Format 2 - Prefix Options:</b>
3668 * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> [<valid-lifetime> <pref-lifetime> | infinite] [no-advertise] [off-link] [no-autoconfig] [no-onlink]</b></em>'
3672 * <em>no</em> - All additional flags are ignored and the prefix is deleted.
3674 * <em><valid-lifetime> <pref-lifetime></em> - '<em><valid-lifetime></em>' is the
3675 * length of time in seconds during what the prefix is valid for the purpose of
3676 * on-link determination. Range is 7203 to 2592000 seconds and default is 2592000
3677 * seconds (30 days). '<em><pref-lifetime></em>' is the prefered-lifetime and is the
3678 * length of time in seconds during what addresses generated from the prefix remain
3679 * preferred. Range is 0 to 604800 seconds and default is 604800 seconds (7 days).
3681 * <em>infinite</em> - Both '<em><valid-lifetime></em>' and '<em><<pref-lifetime></em>'
3682 * are inifinte, no timeout.
3684 * <em>no-advertise</em> - Do not send full router address in prefix
3685 * advertisement. Default is to advertise (i.e. - This flag is off by default).
3687 * <em>off-link</em> - Prefix is off-link, clear L-bit in packet. Default is on-link
3688 * (i.e. - This flag is off and L-bit in packet is set by default and this prefix can
3689 * be used for on-link determination). '<em>no-onlink</em>' also controls the L-bit.
3691 * <em>no-autoconfig</em> - Do not use prefix for autoconfiguration, clear A-bit in packet.
3692 * Default is autoconfig (i.e. - This flag is off and A-bit in packet is set by default.
3694 * <em>no-onlink</em> - Do not use prefix for onlink determination, clear L-bit in packet.
3695 * Default is on-link (i.e. - This flag is off and L-bit in packet is set by default and
3696 * this prefix can be used for on-link determination). '<em>off-link</em>' also controls
3700 * <b>Format 3: - Default of Prefix:</b>
3702 * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> default</b></em>'
3704 * When a new prefix is added (or existing one is being overwritten) <em>default</em>
3705 * uses default values for the prefix. If <em>no</em> is used, the <em>default</em>
3706 * is ignored and the prefix is deleted.
3710 * Example of how set a router advertisement option:
3711 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 ra-interval 100 20}
3712 * Example of how to add a prefix:
3713 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 prefix fe80::fe:28ff:fe9c:75b3/64 infinite no-advertise}
3714 * Example of how to delete a prefix:
3715 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 no prefix fe80::fe:28ff:fe9c:75b3/64}
3718 VLIB_CLI_COMMAND (ip6_nd_command, static) =
3721 .short_help = "ip6 nd <interface> ...",
3722 .function = ip6_neighbor_cmd,
3727 set_ip6_link_local_address (vlib_main_t * vm,
3728 u32 sw_if_index, ip6_address_t * address)
3730 clib_error_t *error = 0;
3731 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3733 ip6_radv_t *radv_info;
3734 vnet_main_t *vnm = vnet_get_main ();
3736 if (!ip6_address_is_link_local_unicast (address))
3738 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_LINK_LOCAL;
3739 return (error = clib_error_return (0, "address not link-local",
3740 format_unformat_error));
3743 /* call enable ipv6 */
3744 enable_ip6_interface (vm, sw_if_index);
3746 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3750 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3752 /* save if link local address (overwrite default) */
3754 /* delete the old one */
3755 error = ip6_add_del_interface_address (vm, sw_if_index,
3756 &radv_info->link_local_address,
3757 128, 1 /* is_del */ );
3761 /* add the new one */
3762 error = ip6_add_del_interface_address (vm, sw_if_index,
3768 radv_info->link_local_address = *address;
3774 vnm->api_errno = VNET_API_ERROR_IP6_NOT_ENABLED;
3775 error = clib_error_return (0, "ip6 not enabled for interface",
3776 format_unformat_error);
3782 set_ip6_link_local_address_cmd (vlib_main_t * vm,
3783 unformat_input_t * input,
3784 vlib_cli_command_t * cmd)
3786 vnet_main_t *vnm = vnet_get_main ();
3787 clib_error_t *error = 0;
3789 ip6_address_t ip6_addr;
3791 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3793 /* get the rest of the command */
3794 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3796 if (unformat (input, "%U", unformat_ip6_address, &ip6_addr))
3799 return (unformat_parse_error (input));
3802 error = set_ip6_link_local_address (vm, sw_if_index, &ip6_addr);
3807 * This command is used to assign an IPv6 Link-local address to an
3808 * interface. This command will enable IPv6 on an interface if it
3809 * is not already enabled. Use the '<em>show ip6 interface</em>' command
3810 * to display the assigned Link-local address.
3813 * Example of how to assign an IPv6 Link-local address to an interface:
3814 * @cliexcmd{set ip6 link-local address GigabitEthernet2/0/0 FE80::AB8}
3817 VLIB_CLI_COMMAND (set_ip6_link_local_address_command, static) =
3819 .path = "set ip6 link-local address",
3820 .short_help = "set ip6 link-local address <interface> <ip6-address>",
3821 .function = set_ip6_link_local_address_cmd,
3826 * @brief callback when an interface address is added or deleted
3829 ip6_neighbor_add_del_interface_address (ip6_main_t * im,
3832 ip6_address_t * address,
3834 u32 if_address_index, u32 is_delete)
3836 vnet_main_t *vnm = vnet_get_main ();
3837 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3839 vlib_main_t *vm = vnm->vlib_main;
3840 ip6_radv_t *radv_info;
3843 /* create solicited node multicast address for this interface adddress */
3844 ip6_set_solicited_node_multicast_address (&a, 0);
3846 a.as_u8[0xd] = address->as_u8[0xd];
3847 a.as_u8[0xe] = address->as_u8[0xe];
3848 a.as_u8[0xf] = address->as_u8[0xf];
3852 /* try to create radv_info - does nothing if ipv6 already enabled */
3853 enable_ip6_interface (vm, sw_if_index);
3855 /* look up the radv_t information for this interface */
3856 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3858 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3862 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3865 if (!ip6_address_is_link_local_unicast (address))
3866 radv_info->ref_count++;
3868 ip6_neighbor_add_mld_prefix (radv_info, &a);
3875 /* look up the radv_t information for this interface */
3876 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3878 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3883 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3885 ip6_neighbor_del_mld_prefix (radv_info, &a);
3887 /* if interface up send MLDP "report" */
3888 radv_info->all_routers_mcast = 0;
3891 if (!ip6_address_is_link_local_unicast (address))
3892 radv_info->ref_count--;
3894 /* Ensure that IPv6 is disabled, and LL removed after ref_count reaches 0 */
3895 disable_ip6_interface (vm, sw_if_index);
3900 ip6_set_neighbor_limit (u32 neighbor_limit)
3902 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3904 nm->limit_neighbor_cache_size = neighbor_limit;
3909 ip6_neighbor_table_bind (ip6_main_t * im,
3912 u32 new_fib_index, u32 old_fib_index)
3914 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3915 ip6_neighbor_t *n = NULL;
3916 u32 i, *to_re_add = 0;
3919 pool_foreach (n, nm->neighbor_pool,
3921 if (n->key.sw_if_index == sw_if_index)
3922 vec_add1 (to_re_add, n - nm->neighbor_pool);
3926 for (i = 0; i < vec_len (to_re_add); i++)
3928 n = pool_elt_at_index (nm->neighbor_pool, to_re_add[i]);
3929 ip6_neighbor_adj_fib_remove (n, old_fib_index);
3930 ip6_neighbor_adj_fib_add (n, new_fib_index);
3932 vec_free (to_re_add);
3935 static clib_error_t *
3936 ip6_neighbor_init (vlib_main_t * vm)
3938 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3939 ip6_main_t *im = &ip6_main;
3941 mhash_init (&nm->neighbor_index_by_key,
3942 /* value size */ sizeof (uword),
3943 /* key size */ sizeof (ip6_neighbor_key_t));
3945 icmp6_register_type (vm, ICMP6_neighbor_solicitation,
3946 ip6_icmp_neighbor_solicitation_node.index);
3947 icmp6_register_type (vm, ICMP6_neighbor_advertisement,
3948 ip6_icmp_neighbor_advertisement_node.index);
3949 icmp6_register_type (vm, ICMP6_router_solicitation,
3950 ip6_icmp_router_solicitation_node.index);
3951 icmp6_register_type (vm, ICMP6_router_advertisement,
3952 ip6_icmp_router_advertisement_node.index);
3954 /* handler node for ip6 neighbor discovery events and timers */
3955 vlib_register_node (vm, &ip6_icmp_neighbor_discovery_event_node);
3957 /* add call backs */
3958 ip6_add_del_interface_address_callback_t cb;
3959 memset (&cb, 0x0, sizeof (ip6_add_del_interface_address_callback_t));
3961 /* when an interface address changes... */
3962 cb.function = ip6_neighbor_add_del_interface_address;
3963 cb.function_opaque = 0;
3964 vec_add1 (im->add_del_interface_address_callbacks, cb);
3966 ip6_table_bind_callback_t cbt;
3967 cbt.function = ip6_neighbor_table_bind;
3968 cbt.function_opaque = 0;
3969 vec_add1 (im->table_bind_callbacks, cbt);
3971 mhash_init (&nm->pending_resolutions_by_address,
3972 /* value size */ sizeof (uword),
3973 /* key size */ sizeof (ip6_address_t));
3975 mhash_init (&nm->mac_changes_by_address,
3976 /* value size */ sizeof (uword),
3977 /* key size */ sizeof (ip6_address_t));
3979 /* default, configurable */
3980 nm->limit_neighbor_cache_size = 50000;
3982 nm->wc_ip6_nd_publisher_node = (uword) ~ 0;
3985 /* $$$$ Hack fix for today */
3986 vec_validate_init_empty
3987 (im->discover_neighbor_next_index_by_hw_if_index, 32, 0 /* drop */ );
3993 VLIB_INIT_FUNCTION (ip6_neighbor_init);
3997 vnet_register_ip6_neighbor_resolution_event (vnet_main_t * vnm,
4000 uword type_opaque, uword data)
4002 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4003 ip6_address_t *address = address_arg;
4005 pending_resolution_t *pr;
4007 pool_get (nm->pending_resolutions, pr);
4009 pr->next_index = ~0;
4010 pr->node_index = node_index;
4011 pr->type_opaque = type_opaque;
4014 p = mhash_get (&nm->pending_resolutions_by_address, address);
4017 /* Insert new resolution at the head of the list */
4018 pr->next_index = p[0];
4019 mhash_unset (&nm->pending_resolutions_by_address, address, 0);
4022 mhash_set (&nm->pending_resolutions_by_address, address,
4023 pr - nm->pending_resolutions, 0 /* old value */ );
4027 vnet_add_del_ip6_nd_change_event (vnet_main_t * vnm,
4028 void *data_callback,
4032 uword type_opaque, uword data, int is_add)
4034 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4035 ip6_address_t *address = address_arg;
4037 /* Try to find an existing entry */
4038 u32 *first = (u32 *) mhash_get (&nm->mac_changes_by_address, address);
4040 pending_resolution_t *mc;
4041 while (p && *p != ~0)
4043 mc = pool_elt_at_index (nm->mac_changes, *p);
4044 if (mc->node_index == node_index && mc->type_opaque == type_opaque
4047 p = &mc->next_index;
4050 int found = p && *p != ~0;
4054 return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
4056 pool_get (nm->mac_changes, mc);
4057 *mc = (pending_resolution_t)
4059 .next_index = ~0,.node_index = node_index,.type_opaque =
4060 type_opaque,.data = data,.data_callback = data_callback,.pid =
4063 /* Insert new resolution at the end of the list */
4064 u32 new_idx = mc - nm->mac_changes;
4068 mhash_set (&nm->mac_changes_by_address, address, new_idx, 0);
4073 return VNET_API_ERROR_NO_SUCH_ENTRY;
4075 /* Clients may need to clean up pool entries, too */
4076 void (*fp) (u32, u8 *) = data_callback;
4078 (*fp) (mc->data, 0 /* no new mac addrs */ );
4080 /* Remove the entry from the list and delete the entry */
4081 *p = mc->next_index;
4082 pool_put (nm->mac_changes, mc);
4084 /* Remove from hash if we deleted the last entry */
4085 if (*p == ~0 && p == first)
4086 mhash_unset (&nm->mac_changes_by_address, address, 0);
4092 vnet_ip6_nd_term (vlib_main_t * vm,
4093 vlib_node_runtime_t * node,
4095 ethernet_header_t * eth,
4096 ip6_header_t * ip, u32 sw_if_index, u16 bd_index)
4098 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4099 icmp6_neighbor_solicitation_or_advertisement_header_t *ndh;
4101 ndh = ip6_next_header (ip);
4102 if (ndh->icmp.type != ICMP6_neighbor_solicitation &&
4103 ndh->icmp.type != ICMP6_neighbor_advertisement)
4106 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
4107 (p0->flags & VLIB_BUFFER_IS_TRACED)))
4109 u8 *t0 = vlib_add_trace (vm, node, p0,
4110 sizeof (icmp6_input_trace_t));
4111 clib_memcpy (t0, ip, sizeof (icmp6_input_trace_t));
4114 /* Check if anyone want ND events for L2 BDs */
4116 (nm->wc_ip6_nd_publisher_node != (uword) ~ 0
4117 && !ip6_address_is_link_local_unicast (&ip->src_address)))
4119 vnet_nd_wc_publish (sw_if_index, eth->src_address, &ip->src_address);
4122 /* Check if MAC entry exsist for solicited target IP */
4123 if (ndh->icmp.type == ICMP6_neighbor_solicitation)
4125 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *opt;
4126 l2_bridge_domain_t *bd_config;
4129 opt = (void *) (ndh + 1);
4130 if ((opt->header.type !=
4131 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address) ||
4132 (opt->header.n_data_u64s != 1))
4133 return 0; /* source link layer address option not present */
4135 bd_config = vec_elt_at_index (l2input_main.bd_configs, bd_index);
4137 (u8 *) hash_get_mem (bd_config->mac_by_ip6, &ndh->target_address);
4139 { /* found ip-mac entry, generate eighbor advertisement response */
4141 vlib_node_runtime_t *error_node =
4142 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
4143 ip->dst_address = ip->src_address;
4144 ip->src_address = ndh->target_address;
4145 ip->hop_limit = 255;
4147 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
4148 clib_memcpy (opt->ethernet_address, macp, 6);
4149 ndh->icmp.type = ICMP6_neighbor_advertisement;
4150 ndh->advertisement_flags = clib_host_to_net_u32
4151 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED |
4152 ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
4153 ndh->icmp.checksum = 0;
4154 ndh->icmp.checksum =
4155 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip, &bogus_length);
4156 clib_memcpy (eth->dst_address, eth->src_address, 6);
4157 clib_memcpy (eth->src_address, macp, 6);
4158 vlib_error_count (vm, error_node->node_index,
4159 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX, 1);
4169 ip6_neighbor_proxy_add_del (u32 sw_if_index, ip6_address_t * addr, u8 is_del)
4173 fib_prefix_t pfx = {
4175 .fp_proto = FIB_PROTOCOL_IP6,
4180 ip46_address_t nh = {
4184 fib_index = ip6_fib_table_get_index_for_sw_if_index (sw_if_index);
4186 if (~0 == fib_index)
4187 return VNET_API_ERROR_NO_SUCH_FIB;
4191 fib_table_entry_path_remove (fib_index,
4193 FIB_SOURCE_IP6_ND_PROXY,
4197 ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
4198 /* flush the ND cache of this address if it's there */
4199 vnet_unset_ip6_ethernet_neighbor (vlib_get_main (),
4200 sw_if_index, addr, NULL, 0);
4204 fib_table_entry_path_add (fib_index,
4206 FIB_SOURCE_IP6_ND_PROXY,
4207 FIB_ENTRY_FLAG_NONE,
4211 ~0, 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
4216 static clib_error_t *
4217 set_ip6_nd_proxy_cmd (vlib_main_t * vm,
4218 unformat_input_t * input, vlib_cli_command_t * cmd)
4220 vnet_main_t *vnm = vnet_get_main ();
4221 clib_error_t *error = 0;
4226 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4228 /* get the rest of the command */
4229 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
4231 if (unformat (input, "%U", unformat_ip6_address, &addr))
4233 else if (unformat (input, "delete") || unformat (input, "del"))
4236 return (unformat_parse_error (input));
4240 ip6_neighbor_proxy_add_del (sw_if_index, &addr, is_del);
4246 VLIB_CLI_COMMAND (set_ip6_nd_proxy_command, static) =
4248 .path = "set ip6 nd proxy",
4249 .short_help = "set ip6 nd proxy <HOST> <INTERFACE>",
4250 .function = set_ip6_nd_proxy_cmd,
4255 ethernet_ndp_change_mac (u32 sw_if_index)
4257 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4261 pool_foreach (n, nm->neighbor_pool,
4263 if (n->key.sw_if_index == sw_if_index)
4265 adj_nbr_walk_nh6 (sw_if_index,
4266 &n->key.ip6_address,
4267 ip6_nd_mk_complete_walk, n);
4274 send_ip6_na (vlib_main_t * vm, vnet_hw_interface_t * hi)
4276 ip6_main_t *i6m = &ip6_main;
4277 u32 sw_if_index = hi->sw_if_index;
4278 ip6_address_t *ip6_addr = ip6_interface_first_address (i6m, sw_if_index);
4282 ("Sending unsolicitated NA IP6 address %U on sw_if_idex %d",
4283 format_ip6_address, ip6_addr, sw_if_index);
4285 /* Form unsolicited neighbor advertisement packet from NS pkt template */
4288 icmp6_neighbor_solicitation_header_t *h =
4289 vlib_packet_template_get_packet (vm,
4290 &i6m->discover_neighbor_packet_template,
4292 ip6_set_reserved_multicast_address (&h->ip.dst_address,
4293 IP6_MULTICAST_SCOPE_link_local,
4294 IP6_MULTICAST_GROUP_ID_all_hosts);
4295 h->ip.src_address = ip6_addr[0];
4296 h->neighbor.icmp.type = ICMP6_neighbor_advertisement;
4297 h->neighbor.target_address = ip6_addr[0];
4298 h->neighbor.advertisement_flags = clib_host_to_net_u32
4299 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
4300 clib_memcpy (h->link_layer_option.ethernet_address,
4301 hi->hw_address, vec_len (hi->hw_address));
4302 h->neighbor.icmp.checksum =
4303 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
4304 ASSERT (bogus_length == 0);
4306 /* Setup MAC header with IP6 Etype and mcast DMAC */
4307 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
4308 vlib_buffer_advance (b, -sizeof (ethernet_header_t));
4309 ethernet_header_t *e = vlib_buffer_get_current (b);
4310 e->type = clib_host_to_net_u16 (ETHERNET_TYPE_IP6);
4311 clib_memcpy (e->src_address, hi->hw_address, sizeof (e->src_address));
4312 ip6_multicast_ethernet_address (e->dst_address,
4313 IP6_MULTICAST_GROUP_ID_all_hosts);
4315 /* Send unsolicited ND advertisement packet out the specified interface */
4316 vnet_buffer (b)->sw_if_index[VLIB_RX] =
4317 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
4318 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
4319 u32 *to_next = vlib_frame_vector_args (f);
4322 vlib_put_frame_to_node (vm, hi->output_node_index, f);
4327 * fd.io coding-style-patch-verification: ON
4330 * eval: (c-set-style "gnu")