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>
28 #include <vnet/ip/ip6_ll_table.h>
32 * @brief IPv6 Neighbor Adjacency and Neighbor Discovery.
34 * The files contains the API and CLI code for managing IPv6 neighbor
35 * adjacency tables and neighbor discovery logic.
38 /* can't use sizeof link_layer_address, that's 8 */
39 #define ETHER_MAC_ADDR_LEN 6
41 /* advertised prefix option */
44 /* basic advertised information */
48 int adv_autonomous_flag;
49 u32 adv_valid_lifetime_in_secs;
50 u32 adv_pref_lifetime_in_secs;
52 /* advertised values are computed from these times if decrementing */
53 f64 valid_lifetime_expires;
54 f64 pref_lifetime_expires;
56 /* local information */
58 int deprecated_prefix_flag;
59 int decrement_lifetime_flag;
61 #define MIN_ADV_VALID_LIFETIME 7203 /* seconds */
62 #define DEF_ADV_VALID_LIFETIME 2592000
63 #define DEF_ADV_PREF_LIFETIME 604800
65 /* extensions are added here, mobile, DNS etc.. */
71 /* group information */
73 ip6_address_t mcast_address;
75 ip6_address_t *mcast_source_address_pool;
78 /* configured router advertisement information per ipv6 interface */
82 /* advertised config information, zero means unspecified */
86 u16 adv_router_lifetime_in_sec;
87 u32 adv_neighbor_reachable_time_in_msec;
88 u32 adv_time_in_msec_between_retransmitted_neighbor_solicitations;
93 /* source link layer option */
94 u8 link_layer_address[8];
95 u8 link_layer_addr_len;
98 ip6_radv_prefix_t *adv_prefixes_pool;
100 /* Hash table mapping address to index in interface advertised prefix pool. */
101 mhash_t address_to_prefix_index;
103 /* MLDP group information */
104 ip6_mldp_group_t *mldp_group_pool;
106 /* Hash table mapping address to index in mldp address pool. */
107 mhash_t address_to_mldp_index;
109 /* local information */
111 int send_radv; /* radv on/off on this interface - set by config */
112 int cease_radv; /* we are ceasing to send - set byf config */
114 int adv_link_layer_address;
116 int failed_device_check;
117 int all_routers_mcast;
121 adj_index_t mcast_adj_index;
123 /* timing information */
124 #define DEF_MAX_RADV_INTERVAL 200
125 #define DEF_MIN_RADV_INTERVAL .75 * DEF_MAX_RADV_INTERVAL
126 #define DEF_CURR_HOP_LIMIT 64
127 #define DEF_DEF_RTR_LIFETIME 3 * DEF_MAX_RADV_INTERVAL
128 #define MAX_DEF_RTR_LIFETIME 9000
130 #define MAX_INITIAL_RTR_ADVERT_INTERVAL 16 /* seconds */
131 #define MAX_INITIAL_RTR_ADVERTISEMENTS 3 /*transmissions */
132 #define MIN_DELAY_BETWEEN_RAS 3 /* seconds */
133 #define MAX_DELAY_BETWEEN_RAS 1800 /* seconds */
134 #define MAX_RA_DELAY_TIME .5 /* seconds */
136 f64 max_radv_interval;
137 f64 min_radv_interval;
138 f64 min_delay_between_radv;
139 f64 max_delay_between_radv;
140 f64 max_rtr_default_lifetime;
143 f64 last_multicast_time;
144 f64 next_multicast_time;
147 u32 initial_adverts_count;
148 f64 initial_adverts_interval;
149 u32 initial_adverts_sent;
152 u32 n_advertisements_sent;
153 u32 n_solicitations_rcvd;
154 u32 n_solicitations_dropped;
156 /* Link local address to use (defaults to underlying physical for logical interfaces */
157 ip6_address_t link_local_address;
166 /* Used for nd event notification only */
169 } pending_resolution_t;
174 /* Hash tables mapping name to opcode. */
175 uword *opcode_by_name;
177 /* lite beer "glean" adjacency handling */
178 mhash_t pending_resolutions_by_address;
179 pending_resolution_t *pending_resolutions;
181 /* Mac address change notification */
182 mhash_t mac_changes_by_address;
183 pending_resolution_t *mac_changes;
185 u32 *neighbor_input_next_index_by_hw_if_index;
187 ip6_neighbor_t *neighbor_pool;
189 mhash_t neighbor_index_by_key;
191 u32 *if_radv_pool_index_by_sw_if_index;
193 ip6_radv_t *if_radv_pool;
195 /* Neighbor attack mitigation */
196 u32 limit_neighbor_cache_size;
197 u32 neighbor_delete_rotor;
199 /* Wildcard nd report publisher */
200 uword wc_ip6_nd_publisher_node;
201 uword wc_ip6_nd_publisher_et;
202 } ip6_neighbor_main_t;
204 /* ipv6 neighbor discovery - timer/event types */
208 } ip6_icmp_neighbor_discovery_event_type_t;
218 } ip6_icmp_neighbor_discovery_event_data_t;
220 static ip6_neighbor_main_t ip6_neighbor_main;
221 static ip6_address_t ip6a_zero; /* ip6 address 0 */
223 static void wc_nd_signal_report (wc_nd_report_t * r);
226 * @brief publish wildcard arp event
227 * @param sw_if_index The interface on which the ARP entires are acted
230 vnet_nd_wc_publish (u32 sw_if_index, u8 * mac, ip6_address_t * ip6)
233 .sw_if_index = sw_if_index,
236 memcpy (r.mac, mac, sizeof r.mac);
238 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
239 vl_api_rpc_call_main_thread (wc_nd_signal_report, (u8 *) & r, sizeof r);
244 wc_nd_signal_report (wc_nd_report_t * r)
246 vlib_main_t *vm = vlib_get_main ();
247 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
248 uword ni = nm->wc_ip6_nd_publisher_node;
249 uword et = nm->wc_ip6_nd_publisher_et;
251 if (ni == (uword) ~ 0)
254 vlib_process_signal_event_data (vm, ni, et, 1, sizeof *q);
260 wc_nd_set_publisher_node (uword node_index, uword event_type)
262 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
263 nm->wc_ip6_nd_publisher_node = node_index;
264 nm->wc_ip6_nd_publisher_et = event_type;
268 format_ip6_neighbor_ip6_entry (u8 * s, va_list * va)
270 vlib_main_t *vm = va_arg (*va, vlib_main_t *);
271 ip6_neighbor_t *n = va_arg (*va, ip6_neighbor_t *);
272 vnet_main_t *vnm = vnet_get_main ();
273 vnet_sw_interface_t *si;
277 return format (s, "%=12s%=25s%=6s%=20s%=40s", "Time", "Address", "Flags",
278 "Link layer", "Interface");
280 if (n->flags & IP6_NEIGHBOR_FLAG_DYNAMIC)
281 flags = format (flags, "D");
283 if (n->flags & IP6_NEIGHBOR_FLAG_STATIC)
284 flags = format (flags, "S");
286 if (n->flags & IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY)
287 flags = format (flags, "N");
289 si = vnet_get_sw_interface (vnm, n->key.sw_if_index);
290 s = format (s, "%=12U%=25U%=6s%=20U%=40U",
291 format_vlib_cpu_time, vm, n->cpu_time_last_updated,
292 format_ip6_address, &n->key.ip6_address,
293 flags ? (char *) flags : "",
294 format_ethernet_address, n->link_layer_address,
295 format_vnet_sw_interface_name, vnm, si);
302 ip6_neighbor_adj_fib_remove (ip6_neighbor_t * n, u32 fib_index)
304 if (FIB_NODE_INDEX_INVALID != n->fib_entry_index)
306 if (ip6_address_is_link_local_unicast (&n->key.ip6_address))
308 ip6_ll_prefix_t pfx = {
309 .ilp_addr = n->key.ip6_address,
310 .ilp_sw_if_index = n->key.sw_if_index,
312 ip6_ll_table_entry_delete (&pfx);
318 .fp_proto = FIB_PROTOCOL_IP6,
319 .fp_addr.ip6 = n->key.ip6_address,
321 fib_table_entry_path_remove (fib_index,
326 n->key.sw_if_index, ~0,
327 1, FIB_ROUTE_PATH_FLAG_NONE);
332 static clib_error_t *
333 ip6_neighbor_sw_interface_up_down (vnet_main_t * vnm,
334 u32 sw_if_index, u32 flags)
336 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
339 if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
341 u32 i, *to_delete = 0;
344 pool_foreach (n, nm->neighbor_pool,
346 if (n->key.sw_if_index == sw_if_index)
347 vec_add1 (to_delete, n - nm->neighbor_pool);
351 for (i = 0; i < vec_len (to_delete); i++)
353 n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
354 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
355 ip6_neighbor_adj_fib_remove (n,
356 ip6_fib_table_get_index_for_sw_if_index
357 (n->key.sw_if_index));
358 pool_put (nm->neighbor_pool, n);
360 vec_free (to_delete);
366 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_neighbor_sw_interface_up_down);
369 unset_random_neighbor_entry (void)
371 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
372 vnet_main_t *vnm = vnet_get_main ();
373 vlib_main_t *vm = vnm->vlib_main;
377 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
378 nm->neighbor_delete_rotor = index;
380 /* Try again from elt 0, could happen if an intfc goes down */
383 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
384 nm->neighbor_delete_rotor = index;
387 /* Nothing left in the pool */
391 e = pool_elt_at_index (nm->neighbor_pool, index);
393 vnet_unset_ip6_ethernet_neighbor (vm, e->key.sw_if_index,
395 e->link_layer_address,
404 u8 link_layer_address[6];
407 } ip6_neighbor_set_unset_rpc_args_t;
409 static void ip6_neighbor_set_unset_rpc_callback
410 (ip6_neighbor_set_unset_rpc_args_t * a);
412 static void set_unset_ip6_neighbor_rpc
415 ip6_address_t * a, u8 * link_layer_address, int is_add, int is_static,
418 ip6_neighbor_set_unset_rpc_args_t args;
419 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
421 args.sw_if_index = sw_if_index;
422 args.is_add = is_add;
423 args.is_static = is_static;
424 args.is_no_fib_entry = is_no_fib_entry;
425 clib_memcpy (&args.addr, a, sizeof (*a));
426 if (NULL != link_layer_address)
427 clib_memcpy (args.link_layer_address, link_layer_address, 6);
429 vl_api_rpc_call_main_thread (ip6_neighbor_set_unset_rpc_callback,
430 (u8 *) & args, sizeof (args));
434 ip6_nbr_probe (ip_adjacency_t * adj)
436 icmp6_neighbor_solicitation_header_t *h;
437 vnet_main_t *vnm = vnet_get_main ();
438 ip6_main_t *im = &ip6_main;
439 ip_interface_address_t *ia;
440 ip6_address_t *dst, *src;
441 vnet_hw_interface_t *hi;
442 vnet_sw_interface_t *si;
448 vm = vlib_get_main ();
450 si = vnet_get_sw_interface (vnm, adj->rewrite_header.sw_if_index);
451 dst = &adj->sub_type.nbr.next_hop.ip6;
453 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
457 src = ip6_interface_address_matching_destination (im, dst,
465 h = vlib_packet_template_get_packet (vm,
466 &im->discover_neighbor_packet_template,
469 hi = vnet_get_sup_hw_interface (vnm, adj->rewrite_header.sw_if_index);
471 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
472 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
473 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
474 h->ip.src_address = src[0];
475 h->neighbor.target_address = dst[0];
477 clib_memcpy (h->link_layer_option.ethernet_address,
478 hi->hw_address, vec_len (hi->hw_address));
480 h->neighbor.icmp.checksum =
481 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
482 ASSERT (bogus_length == 0);
484 b = vlib_get_buffer (vm, bi);
485 vnet_buffer (b)->sw_if_index[VLIB_RX] =
486 vnet_buffer (b)->sw_if_index[VLIB_TX] = adj->rewrite_header.sw_if_index;
488 /* Add encapsulation string for software interface (e.g. ethernet header). */
489 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
490 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
493 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
494 u32 *to_next = vlib_frame_vector_args (f);
497 vlib_put_frame_to_node (vm, hi->output_node_index, f);
502 ip6_nd_mk_complete (adj_index_t ai, ip6_neighbor_t * nbr)
504 adj_nbr_update_rewrite (ai, ADJ_NBR_REWRITE_FLAG_COMPLETE,
505 ethernet_build_rewrite (vnet_get_main (),
506 nbr->key.sw_if_index,
507 adj_get_link_type (ai),
508 nbr->link_layer_address));
512 ip6_nd_mk_incomplete (adj_index_t ai)
514 ip_adjacency_t *adj = adj_get (ai);
516 adj_nbr_update_rewrite (ai,
517 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
518 ethernet_build_rewrite (vnet_get_main (),
521 adj_get_link_type (ai),
522 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
525 #define IP6_NBR_MK_KEY(k, sw_if_index, addr) \
527 k.sw_if_index = sw_if_index; \
528 k.ip6_address = *addr; \
532 static ip6_neighbor_t *
533 ip6_nd_find (u32 sw_if_index, const ip6_address_t * addr)
535 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
536 ip6_neighbor_t *n = NULL;
537 ip6_neighbor_key_t k;
540 IP6_NBR_MK_KEY (k, sw_if_index, addr);
542 p = mhash_get (&nm->neighbor_index_by_key, &k);
545 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
552 ip6_nd_mk_complete_walk (adj_index_t ai, void *ctx)
554 ip6_neighbor_t *nbr = ctx;
556 ip6_nd_mk_complete (ai, nbr);
558 return (ADJ_WALK_RC_CONTINUE);
562 ip6_nd_mk_incomplete_walk (adj_index_t ai, void *ctx)
564 ip6_nd_mk_incomplete (ai);
566 return (ADJ_WALK_RC_CONTINUE);
570 ip6_ethernet_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
577 nbr = ip6_nd_find (sw_if_index, &adj->sub_type.nbr.next_hop.ip6);
579 switch (adj->lookup_next_index)
581 case IP_LOOKUP_NEXT_GLEAN:
582 adj_glean_update_rewrite (ai);
584 case IP_LOOKUP_NEXT_ARP:
587 adj_nbr_walk_nh6 (sw_if_index, &nbr->key.ip6_address,
588 ip6_nd_mk_complete_walk, nbr);
593 * no matching ND entry.
594 * construct the rewrite required to for an ND packet, and stick
595 * that in the adj's pipe to smoke.
597 adj_nbr_update_rewrite (ai,
598 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
599 ethernet_build_rewrite (vnm,
602 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
605 * since the FIB has added this adj for a route, it makes sense it may
606 * want to forward traffic sometime soon. Let's send a speculative ND.
607 * just one. If we were to do periodically that wouldn't be bad either,
608 * but that's more code than i'm prepared to write at this time for
609 * relatively little reward.
614 case IP_LOOKUP_NEXT_MCAST:
617 * Construct a partial rewrite from the known ethernet mcast dest MAC
622 rewrite = ethernet_build_rewrite (vnm,
625 ethernet_ip6_mcast_dst_addr ());
628 * Complete the remaining fields of the adj's rewrite to direct the
629 * complete of the rewrite at switch time by copying in the IP
630 * dst address's bytes.
631 * Ofset is 2 bytes into the desintation address. And we write 4 bytes.
633 offset = vec_len (rewrite) - 2;
634 adj_mcast_update_rewrite (ai, rewrite, offset, 0xffffffff);
638 case IP_LOOKUP_NEXT_DROP:
639 case IP_LOOKUP_NEXT_PUNT:
640 case IP_LOOKUP_NEXT_LOCAL:
641 case IP_LOOKUP_NEXT_REWRITE:
642 case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
643 case IP_LOOKUP_NEXT_MIDCHAIN:
644 case IP_LOOKUP_NEXT_ICMP_ERROR:
645 case IP_LOOKUP_N_NEXT:
653 ip6_neighbor_adj_fib_add (ip6_neighbor_t * n, u32 fib_index)
655 if (ip6_address_is_link_local_unicast (&n->key.ip6_address))
657 ip6_ll_prefix_t pfx = {
658 .ilp_addr = n->key.ip6_address,
659 .ilp_sw_if_index = n->key.sw_if_index,
662 ip6_ll_table_entry_update (&pfx, FIB_ROUTE_PATH_FLAG_NONE);
668 .fp_proto = FIB_PROTOCOL_IP6,
669 .fp_addr.ip6 = n->key.ip6_address,
673 fib_table_entry_path_add (fib_index, &pfx, FIB_SOURCE_ADJ,
674 FIB_ENTRY_FLAG_ATTACHED,
675 DPO_PROTO_IP6, &pfx.fp_addr,
676 n->key.sw_if_index, ~0, 1, NULL,
677 FIB_ROUTE_PATH_FLAG_NONE);
682 vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
685 u8 * link_layer_address,
686 uword n_bytes_link_layer_address,
687 int is_static, int is_no_fib_entry)
689 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
690 ip6_neighbor_key_t k;
691 ip6_neighbor_t *n = 0;
692 int make_new_nd_cache_entry = 1;
695 pending_resolution_t *pr, *mc;
697 if (vlib_get_thread_index ())
699 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
700 1 /* set new neighbor */ , is_static,
705 k.sw_if_index = sw_if_index;
706 k.ip6_address = a[0];
709 p = mhash_get (&nm->neighbor_index_by_key, &k);
712 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
713 /* Refuse to over-write static neighbor entry. */
714 if (!is_static && (n->flags & IP6_NEIGHBOR_FLAG_STATIC))
716 make_new_nd_cache_entry = 0;
719 if (make_new_nd_cache_entry)
721 pool_get (nm->neighbor_pool, n);
722 mhash_set (&nm->neighbor_index_by_key, &k, n - nm->neighbor_pool,
725 n->fib_entry_index = FIB_NODE_INDEX_INVALID;
727 clib_memcpy (n->link_layer_address,
728 link_layer_address, n_bytes_link_layer_address);
731 * create the adj-fib. the entry in the FIB table for and to the peer.
733 if (!is_no_fib_entry)
735 ip6_neighbor_adj_fib_add
736 (n, ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index));
740 n->flags |= IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY;
746 * prevent a DoS attack from the data-plane that
747 * spams us with no-op updates to the MAC address
749 if (0 == memcmp (n->link_layer_address,
750 link_layer_address, n_bytes_link_layer_address))
751 goto check_customers;
753 clib_memcpy (n->link_layer_address,
754 link_layer_address, n_bytes_link_layer_address);
757 /* Update time stamp and flags. */
758 n->cpu_time_last_updated = clib_cpu_time_now ();
760 n->flags |= IP6_NEIGHBOR_FLAG_STATIC;
762 n->flags |= IP6_NEIGHBOR_FLAG_DYNAMIC;
764 adj_nbr_walk_nh6 (sw_if_index,
765 &n->key.ip6_address, ip6_nd_mk_complete_walk, n);
768 /* Customer(s) waiting for this address to be resolved? */
769 p = mhash_get (&nm->pending_resolutions_by_address, a);
774 while (next_index != (u32) ~ 0)
776 pr = pool_elt_at_index (nm->pending_resolutions, next_index);
777 vlib_process_signal_event (vm, pr->node_index,
778 pr->type_opaque, pr->data);
779 next_index = pr->next_index;
780 pool_put (nm->pending_resolutions, pr);
783 mhash_unset (&nm->pending_resolutions_by_address, a, 0);
786 /* Customer(s) requesting ND event for this address? */
787 p = mhash_get (&nm->mac_changes_by_address, a);
792 while (next_index != (u32) ~ 0)
794 int (*fp) (u32, u8 *, u32, ip6_address_t *);
796 mc = pool_elt_at_index (nm->mac_changes, next_index);
797 fp = mc->data_callback;
799 /* Call the user's data callback, return 1 to suppress dup events */
802 (*fp) (mc->data, link_layer_address, sw_if_index, &ip6a_zero);
804 * Signal the resolver process, as long as the user
805 * says they want to be notified
808 vlib_process_signal_event (vm, mc->node_index,
809 mc->type_opaque, mc->data);
810 next_index = mc->next_index;
818 vnet_unset_ip6_ethernet_neighbor (vlib_main_t * vm,
821 u8 * link_layer_address,
822 uword n_bytes_link_layer_address)
824 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
825 ip6_neighbor_key_t k;
830 if (vlib_get_thread_index ())
832 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
833 0 /* unset */ , 0, 0);
837 k.sw_if_index = sw_if_index;
838 k.ip6_address = a[0];
841 p = mhash_get (&nm->neighbor_index_by_key, &k);
848 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
849 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
851 adj_nbr_walk_nh6 (sw_if_index,
852 &n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL);
855 if (FIB_NODE_INDEX_INVALID != n->fib_entry_index)
859 .fp_proto = FIB_PROTOCOL_IP6,
860 .fp_addr.ip6 = n->key.ip6_address,
862 fib_table_entry_path_remove
863 (ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index),
867 &pfx.fp_addr, n->key.sw_if_index, ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
869 pool_put (nm->neighbor_pool, n);
875 static void ip6_neighbor_set_unset_rpc_callback
876 (ip6_neighbor_set_unset_rpc_args_t * a)
878 vlib_main_t *vm = vlib_get_main ();
880 vnet_set_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
881 a->link_layer_address, 6, a->is_static,
884 vnet_unset_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
885 a->link_layer_address, 6);
889 ip6_neighbor_sort (void *a1, void *a2)
891 vnet_main_t *vnm = vnet_get_main ();
892 ip6_neighbor_t *n1 = a1, *n2 = a2;
894 cmp = vnet_sw_interface_compare (vnm, n1->key.sw_if_index,
895 n2->key.sw_if_index);
897 cmp = ip6_address_compare (&n1->key.ip6_address, &n2->key.ip6_address);
902 ip6_neighbors_entries (u32 sw_if_index)
904 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
905 ip6_neighbor_t *n, *ns = 0;
908 pool_foreach (n, nm->neighbor_pool,
910 if (sw_if_index != ~0 && n->key.sw_if_index != sw_if_index)
917 vec_sort_with_function (ns, ip6_neighbor_sort);
921 static clib_error_t *
922 show_ip6_neighbors (vlib_main_t * vm,
923 unformat_input_t * input, vlib_cli_command_t * cmd)
925 vnet_main_t *vnm = vnet_get_main ();
926 ip6_neighbor_t *n, *ns;
927 clib_error_t *error = 0;
930 /* Filter entries by interface if given. */
932 (void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index);
934 ns = ip6_neighbors_entries (sw_if_index);
937 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, 0);
940 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, n);
949 * This command is used to display the adjacent IPv6 hosts found via
950 * neighbor discovery. Optionally, limit the output to the specified
954 * Example of how to display the IPv6 neighbor adjacency table:
955 * @cliexstart{show ip6 neighbors}
956 * Time Address Flags Link layer Interface
957 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
958 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
959 * 886.6654 ::1:1:c:0:9 S 02:fe:e4:45:27:5b GigabitEthernet3/0/0
961 * Example of how to display the IPv6 neighbor adjacency table for given interface:
962 * @cliexstart{show ip6 neighbors GigabitEthernet2/0/0}
963 * Time Address Flags Link layer Interface
964 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
965 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
969 VLIB_CLI_COMMAND (show_ip6_neighbors_command, static) = {
970 .path = "show ip6 neighbors",
971 .function = show_ip6_neighbors,
972 .short_help = "show ip6 neighbors [<interface>]",
976 static clib_error_t *
977 set_ip6_neighbor (vlib_main_t * vm,
978 unformat_input_t * input, vlib_cli_command_t * cmd)
980 vnet_main_t *vnm = vnet_get_main ();
986 int is_no_fib_entry = 0;
989 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
991 /* intfc, ip6-address, mac-address */
992 if (unformat (input, "%U %U %U",
993 unformat_vnet_sw_interface, vnm, &sw_if_index,
994 unformat_ip6_address, &addr,
995 unformat_ethernet_address, mac_address))
998 else if (unformat (input, "delete") || unformat (input, "del"))
1000 else if (unformat (input, "static"))
1002 else if (unformat (input, "no-fib-entry"))
1003 is_no_fib_entry = 1;
1009 return clib_error_return (0, "Missing interface, ip6 or hw address");
1012 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
1013 mac_address, sizeof (mac_address),
1014 is_static, is_no_fib_entry);
1016 vnet_unset_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
1017 mac_address, sizeof (mac_address));
1022 * This command is used to manually add an entry to the IPv6 neighbor
1023 * adjacency table. Optionally, the entry can be added as static. It is
1024 * also used to remove an entry from the table. Use the '<em>show ip6
1025 * neighbors</em>' command to display all learned and manually entered entries.
1028 * Example of how to add a static entry to the IPv6 neighbor adjacency table:
1029 * @cliexcmd{set ip6 neighbor GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b static}
1030 * Example of how to delete an entry from the IPv6 neighbor adjacency table:
1031 * @cliexcmd{set ip6 neighbor del GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b}
1034 VLIB_CLI_COMMAND (set_ip6_neighbor_command, static) =
1036 .path = "set ip6 neighbor",
1037 .function = set_ip6_neighbor,
1038 .short_help = "set ip6 neighbor [del] <interface> <ip6-address> <mac-address> [static]",
1044 ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP,
1045 ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY,
1046 ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
1047 } icmp6_neighbor_solicitation_or_advertisement_next_t;
1049 static_always_inline uword
1050 icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
1051 vlib_node_runtime_t * node,
1052 vlib_frame_t * frame,
1053 uword is_solicitation)
1055 vnet_main_t *vnm = vnet_get_main ();
1056 ip6_main_t *im = &ip6_main;
1057 uword n_packets = frame->n_vectors;
1058 u32 *from, *to_next;
1059 u32 n_left_from, n_left_to_next, next_index, n_advertisements_sent;
1060 icmp6_neighbor_discovery_option_type_t option_type;
1061 vlib_node_runtime_t *error_node =
1062 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1065 from = vlib_frame_vector_args (frame);
1066 n_left_from = n_packets;
1067 next_index = node->cached_next_index;
1069 if (node->flags & VLIB_NODE_FLAG_TRACE)
1070 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1072 sizeof (icmp6_input_trace_t));
1076 ? ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address
1077 : ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address);
1078 n_advertisements_sent = 0;
1080 while (n_left_from > 0)
1082 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1084 while (n_left_from > 0 && n_left_to_next > 0)
1088 icmp6_neighbor_solicitation_or_advertisement_header_t *h0;
1089 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1090 u32 bi0, options_len0, sw_if_index0, next0, error0;
1091 u32 ip6_sadd_link_local, ip6_sadd_unspecified;
1095 bi0 = to_next[0] = from[0];
1100 n_left_to_next -= 1;
1102 p0 = vlib_get_buffer (vm, bi0);
1103 ip0 = vlib_buffer_get_current (p0);
1104 h0 = ip6_next_header (ip0);
1106 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1108 error0 = ICMP6_ERROR_NONE;
1109 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1110 ip6_sadd_link_local =
1111 ip6_address_is_link_local_unicast (&ip0->src_address);
1112 ip6_sadd_unspecified =
1113 ip6_address_is_unspecified (&ip0->src_address);
1115 /* Check that source address is unspecified, link-local or else on-link. */
1116 if (!ip6_sadd_unspecified && !ip6_sadd_link_local)
1118 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1120 if (ADJ_INDEX_INVALID != src_adj_index0)
1122 ip_adjacency_t *adj0 = adj_get (src_adj_index0);
1124 /* Allow all realistic-looking rewrite adjacencies to pass */
1125 ni0 = adj0->lookup_next_index;
1126 is_rewrite0 = (ni0 >= IP_LOOKUP_NEXT_ARP) &&
1127 (ni0 < IP6_LOOKUP_N_NEXT);
1129 error0 = ((adj0->rewrite_header.sw_if_index != sw_if_index0
1132 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK
1138 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK;
1142 o0 = (void *) (h0 + 1);
1143 o0 = ((options_len0 == 8 && o0->header.type == option_type
1144 && o0->header.n_data_u64s == 1) ? o0 : 0);
1146 /* If src address unspecified or link local, donot learn neighbor MAC */
1147 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1148 !ip6_sadd_unspecified))
1150 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1151 if (nm->limit_neighbor_cache_size &&
1152 pool_elts (nm->neighbor_pool) >=
1153 nm->limit_neighbor_cache_size)
1154 unset_random_neighbor_entry ();
1155 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1158 &h0->target_address,
1159 o0->ethernet_address,
1160 sizeof (o0->ethernet_address),
1164 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1166 /* Check that target address is local to this router. */
1167 fib_node_index_t fei;
1171 ip6_fib_table_get_index_for_sw_if_index (sw_if_index0);
1173 if (~0 == fib_index)
1175 error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1179 if (ip6_address_is_link_local_unicast (&h0->target_address))
1181 fei = ip6_fib_table_lookup_exact_match
1182 (ip6_ll_fib_get (sw_if_index0),
1183 &h0->target_address, 128);
1187 fei = ip6_fib_table_lookup_exact_match (fib_index,
1188 &h0->target_address,
1192 if (FIB_NODE_INDEX_INVALID == fei)
1194 /* The target address is not in the FIB */
1196 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1200 if (FIB_ENTRY_FLAG_LOCAL &
1201 fib_entry_get_flags_for_source (fei,
1202 FIB_SOURCE_INTERFACE))
1204 /* It's an address that belongs to one of our interfaces
1208 if (fib_entry_is_sourced
1209 (fei, FIB_SOURCE_IP6_ND_PROXY) ||
1210 fib_entry_is_sourced (fei, FIB_SOURCE_IP6_ND))
1212 /* The address was added by IPv6 Proxy ND config.
1213 * We should only respond to these if the NS arrived on
1214 * the link that has a matching covering prefix */
1219 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1225 if (is_solicitation)
1226 next0 = (error0 != ICMP6_ERROR_NONE
1227 ? ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP
1228 : ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY);
1232 error0 = error0 == ICMP6_ERROR_NONE ?
1233 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_RX : error0;
1236 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1238 vnet_sw_interface_t *sw_if0;
1239 ethernet_interface_t *eth_if0;
1240 ethernet_header_t *eth0;
1242 /* dst address is either source address or the all-nodes mcast addr */
1243 if (!ip6_sadd_unspecified)
1244 ip0->dst_address = ip0->src_address;
1246 ip6_set_reserved_multicast_address (&ip0->dst_address,
1247 IP6_MULTICAST_SCOPE_link_local,
1248 IP6_MULTICAST_GROUP_ID_all_hosts);
1250 ip0->src_address = h0->target_address;
1251 ip0->hop_limit = 255;
1252 h0->icmp.type = ICMP6_neighbor_advertisement;
1254 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1255 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1257 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1260 clib_memcpy (o0->ethernet_address, eth_if0->address, 6);
1262 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
1265 h0->advertisement_flags = clib_host_to_net_u32
1266 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED
1267 | ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
1269 h0->icmp.checksum = 0;
1271 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1273 ASSERT (bogus_length == 0);
1275 /* Reuse current MAC header, copy SMAC to DMAC and
1276 * interface MAC to SMAC */
1277 vlib_buffer_advance (p0, -ethernet_buffer_header_size (p0));
1278 eth0 = vlib_buffer_get_current (p0);
1279 clib_memcpy (eth0->dst_address, eth0->src_address, 6);
1281 clib_memcpy (eth0->src_address, eth_if0->address, 6);
1283 /* Setup input and output sw_if_index for packet */
1284 ASSERT (vnet_buffer (p0)->sw_if_index[VLIB_RX] == sw_if_index0);
1285 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1286 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1287 vnet_main.local_interface_sw_if_index;
1289 n_advertisements_sent++;
1292 p0->error = error_node->errors[error0];
1294 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1295 to_next, n_left_to_next,
1299 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1302 /* Account for advertisements sent. */
1303 vlib_error_count (vm, error_node->node_index,
1304 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX,
1305 n_advertisements_sent);
1307 return frame->n_vectors;
1310 /* for "syslogging" - use elog for now */
1311 #define foreach_log_level \
1312 _ (DEBUG, "DEBUG") \
1313 _ (INFO, "INFORMATION") \
1314 _ (NOTICE, "NOTICE") \
1315 _ (WARNING, "WARNING") \
1317 _ (CRIT, "CRITICAL") \
1318 _ (ALERT, "ALERT") \
1319 _ (EMERG, "EMERGENCY")
1323 #define _(f,s) LOG_##f,
1328 static char *log_level_strings[] = {
1334 static int logmask = 1 << LOG_DEBUG;
1337 ip6_neighbor_syslog (vlib_main_t * vm, int priority, char *fmt, ...)
1339 /* just use elog for now */
1343 if ((priority > LOG_EMERG) || !(logmask & (1 << priority)))
1349 what = va_format (0, fmt, &va);
1351 ELOG_TYPE_DECLARE (e) =
1353 .format = "ip6 nd: (%s): %s",.format_args = "T4T4",};
1358 ed = ELOG_DATA (&vm->elog_main, e);
1359 ed->s[0] = elog_string (&vm->elog_main, log_level_strings[priority]);
1360 ed->s[1] = elog_string (&vm->elog_main, (char *) what);
1366 /* ipv6 neighbor discovery - router advertisements */
1369 ICMP6_ROUTER_SOLICITATION_NEXT_DROP,
1370 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW,
1371 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX,
1372 ICMP6_ROUTER_SOLICITATION_N_NEXT,
1373 } icmp6_router_solicitation_or_advertisement_next_t;
1375 static_always_inline uword
1376 icmp6_router_solicitation (vlib_main_t * vm,
1377 vlib_node_runtime_t * node, vlib_frame_t * frame)
1379 vnet_main_t *vnm = vnet_get_main ();
1380 ip6_main_t *im = &ip6_main;
1381 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1382 uword n_packets = frame->n_vectors;
1383 u32 *from, *to_next;
1384 u32 n_left_from, n_left_to_next, next_index;
1385 u32 n_advertisements_sent = 0;
1388 icmp6_neighbor_discovery_option_type_t option_type;
1390 vlib_node_runtime_t *error_node =
1391 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1393 from = vlib_frame_vector_args (frame);
1394 n_left_from = n_packets;
1395 next_index = node->cached_next_index;
1397 if (node->flags & VLIB_NODE_FLAG_TRACE)
1398 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1400 sizeof (icmp6_input_trace_t));
1402 /* source may append his LL address */
1403 option_type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1405 while (n_left_from > 0)
1407 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1409 while (n_left_from > 0 && n_left_to_next > 0)
1413 ip6_radv_t *radv_info = 0;
1415 icmp6_neighbor_discovery_header_t *h0;
1416 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1418 u32 bi0, options_len0, sw_if_index0, next0, error0;
1419 u32 is_solicitation = 1, is_dropped = 0;
1420 u32 is_unspecified, is_link_local;
1422 bi0 = to_next[0] = from[0];
1427 n_left_to_next -= 1;
1429 p0 = vlib_get_buffer (vm, bi0);
1430 ip0 = vlib_buffer_get_current (p0);
1431 h0 = ip6_next_header (ip0);
1433 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1434 is_unspecified = ip6_address_is_unspecified (&ip0->src_address);
1436 ip6_address_is_link_local_unicast (&ip0->src_address);
1438 error0 = ICMP6_ERROR_NONE;
1439 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1441 /* check if solicitation (not from nd_timer node) */
1442 if (ip6_address_is_unspecified (&ip0->dst_address))
1443 is_solicitation = 0;
1445 /* Check that source address is unspecified, link-local or else on-link. */
1446 if (!is_unspecified && !is_link_local)
1448 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1450 if (ADJ_INDEX_INVALID != src_adj_index0)
1452 ip_adjacency_t *adj0 = adj_get (src_adj_index0);
1454 error0 = (adj0->rewrite_header.sw_if_index != sw_if_index0
1456 ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK
1461 error0 = ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK;
1465 /* check for source LL option and process */
1466 o0 = (void *) (h0 + 1);
1467 o0 = ((options_len0 == 8
1468 && o0->header.type == option_type
1469 && o0->header.n_data_u64s == 1) ? o0 : 0);
1471 /* if src address unspecified IGNORE any options */
1472 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1473 !is_unspecified && !is_link_local))
1475 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1476 if (nm->limit_neighbor_cache_size &&
1477 pool_elts (nm->neighbor_pool) >=
1478 nm->limit_neighbor_cache_size)
1479 unset_random_neighbor_entry ();
1481 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1483 o0->ethernet_address,
1484 sizeof (o0->ethernet_address),
1488 /* default is to drop */
1489 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1491 if (error0 == ICMP6_ERROR_NONE)
1493 vnet_sw_interface_t *sw_if0;
1494 ethernet_interface_t *eth_if0;
1497 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1498 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1500 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1502 /* only support ethernet interface type for now */
1504 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1507 if (error0 == ICMP6_ERROR_NONE)
1511 /* adjust the sizeof the buffer to just include the ipv6 header */
1512 p0->current_length -=
1514 sizeof (icmp6_neighbor_discovery_header_t));
1516 /* look up the radv_t information for this interface */
1517 vec_validate_init_empty
1518 (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
1520 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1523 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1527 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1530 if (error0 == ICMP6_ERROR_NONE)
1532 f64 now = vlib_time_now (vm);
1534 /* for solicited adverts - need to rate limit */
1535 if (is_solicitation)
1537 if (0 != radv_info->last_radv_time &&
1538 (now - radv_info->last_radv_time) <
1539 MIN_DELAY_BETWEEN_RAS)
1542 radv_info->last_radv_time = now;
1546 icmp6_router_advertisement_header_t rh;
1548 rh.icmp.type = ICMP6_router_advertisement;
1550 rh.icmp.checksum = 0;
1552 rh.current_hop_limit = radv_info->curr_hop_limit;
1553 rh.router_lifetime_in_sec =
1554 clib_host_to_net_u16
1555 (radv_info->adv_router_lifetime_in_sec);
1557 time_in_msec_between_retransmitted_neighbor_solicitations
1559 clib_host_to_net_u32 (radv_info->
1560 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
1561 rh.neighbor_reachable_time_in_msec =
1562 clib_host_to_net_u32 (radv_info->
1563 adv_neighbor_reachable_time_in_msec);
1566 (radv_info->adv_managed_flag) ?
1567 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP :
1570 ((radv_info->adv_other_flag) ?
1571 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP :
1575 u16 payload_length =
1576 sizeof (icmp6_router_advertisement_header_t);
1578 vlib_buffer_add_data (vm,
1579 vlib_buffer_get_free_list_index
1580 (p0), bi0, (void *) &rh,
1582 (icmp6_router_advertisement_header_t));
1584 if (radv_info->adv_link_layer_address)
1586 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
1590 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1591 h.header.n_data_u64s = 1;
1593 /* copy ll address */
1594 clib_memcpy (&h.ethernet_address[0],
1595 eth_if0->address, 6);
1597 vlib_buffer_add_data (vm,
1598 vlib_buffer_get_free_list_index
1599 (p0), bi0, (void *) &h,
1601 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t));
1605 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t);
1608 /* add MTU option */
1609 if (radv_info->adv_link_mtu)
1611 icmp6_neighbor_discovery_mtu_option_t h;
1615 clib_host_to_net_u32 (radv_info->adv_link_mtu);
1616 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu;
1617 h.header.n_data_u64s = 1;
1620 sizeof (icmp6_neighbor_discovery_mtu_option_t);
1622 vlib_buffer_add_data (vm,
1623 vlib_buffer_get_free_list_index
1624 (p0), bi0, (void *) &h,
1626 (icmp6_neighbor_discovery_mtu_option_t));
1629 /* add advertised prefix options */
1630 ip6_radv_prefix_t *pr_info;
1633 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
1635 if(pr_info->enabled &&
1636 (!pr_info->decrement_lifetime_flag
1637 || (pr_info->pref_lifetime_expires >0)))
1639 /* advertise this prefix */
1640 icmp6_neighbor_discovery_prefix_information_option_t h;
1642 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information;
1643 h.header.n_data_u64s = (sizeof(icmp6_neighbor_discovery_prefix_information_option_t) >> 3);
1645 h.dst_address_length = pr_info->prefix_len;
1647 h.flags = (pr_info->adv_on_link_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_FLAG_ON_LINK : 0;
1648 h.flags |= (pr_info->adv_autonomous_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_AUTO : 0;
1650 if(radv_info->cease_radv && pr_info->deprecated_prefix_flag)
1652 h.valid_time = clib_host_to_net_u32(MIN_ADV_VALID_LIFETIME);
1653 h.preferred_time = 0;
1657 if(pr_info->decrement_lifetime_flag)
1659 pr_info->adv_valid_lifetime_in_secs = ((pr_info->valid_lifetime_expires > now)) ?
1660 (pr_info->valid_lifetime_expires - now) : 0;
1662 pr_info->adv_pref_lifetime_in_secs = ((pr_info->pref_lifetime_expires > now)) ?
1663 (pr_info->pref_lifetime_expires - now) : 0;
1666 h.valid_time = clib_host_to_net_u32(pr_info->adv_valid_lifetime_in_secs);
1667 h.preferred_time = clib_host_to_net_u32(pr_info->adv_pref_lifetime_in_secs) ;
1671 clib_memcpy(&h.dst_address, &pr_info->prefix, sizeof(ip6_address_t));
1673 payload_length += sizeof( icmp6_neighbor_discovery_prefix_information_option_t);
1675 vlib_buffer_add_data (vm,
1676 vlib_buffer_get_free_list_index (p0),
1678 (void *)&h, sizeof(icmp6_neighbor_discovery_prefix_information_option_t));
1684 /* add additional options before here */
1686 /* finish building the router advertisement... */
1687 if (!is_unspecified && radv_info->send_unicast)
1689 ip0->dst_address = ip0->src_address;
1693 /* target address is all-nodes mcast addr */
1694 ip6_set_reserved_multicast_address
1696 IP6_MULTICAST_SCOPE_link_local,
1697 IP6_MULTICAST_GROUP_ID_all_hosts);
1700 /* source address MUST be the link-local address */
1701 ip0->src_address = radv_info->link_local_address;
1703 ip0->hop_limit = 255;
1704 ip0->payload_length =
1705 clib_host_to_net_u16 (payload_length);
1707 icmp6_router_advertisement_header_t *rh0 =
1708 (icmp6_router_advertisement_header_t *) (ip0 + 1);
1709 rh0->icmp.checksum =
1710 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1712 ASSERT (bogus_length == 0);
1714 /* setup output if and adjacency */
1715 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1716 vnet_main.local_interface_sw_if_index;
1718 if (is_solicitation)
1720 ethernet_header_t *eth0;
1721 /* Reuse current MAC header, copy SMAC to DMAC and
1722 * interface MAC to SMAC */
1723 vlib_buffer_reset (p0);
1724 eth0 = vlib_buffer_get_current (p0);
1725 clib_memcpy (eth0->dst_address, eth0->src_address,
1727 clib_memcpy (eth0->src_address, eth_if0->address,
1730 is_dropped ? next0 :
1731 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX;
1732 vnet_buffer (p0)->sw_if_index[VLIB_TX] =
1737 adj_index0 = radv_info->mcast_adj_index;
1738 if (adj_index0 == 0)
1739 error0 = ICMP6_ERROR_DST_LOOKUP_MISS;
1743 is_dropped ? next0 :
1744 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW;
1745 vnet_buffer (p0)->ip.adj_index[VLIB_TX] =
1749 p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
1751 radv_info->n_solicitations_dropped += is_dropped;
1752 radv_info->n_solicitations_rcvd += is_solicitation;
1754 if ((error0 == ICMP6_ERROR_NONE) && !is_dropped)
1756 radv_info->n_advertisements_sent++;
1757 n_advertisements_sent++;
1763 p0->error = error_node->errors[error0];
1765 if (error0 != ICMP6_ERROR_NONE)
1766 vlib_error_count (vm, error_node->node_index, error0, 1);
1768 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1769 to_next, n_left_to_next,
1774 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1777 /* Account for router advertisements sent. */
1778 vlib_error_count (vm, error_node->node_index,
1779 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_TX,
1780 n_advertisements_sent);
1782 return frame->n_vectors;
1785 /* validate advertised info for consistancy (see RFC-4861 section 6.2.7) - log any inconsistencies, packet will always be dropped */
1786 static_always_inline uword
1787 icmp6_router_advertisement (vlib_main_t * vm,
1788 vlib_node_runtime_t * node, vlib_frame_t * frame)
1790 vnet_main_t *vnm = vnet_get_main ();
1791 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1792 uword n_packets = frame->n_vectors;
1793 u32 *from, *to_next;
1794 u32 n_left_from, n_left_to_next, next_index;
1795 u32 n_advertisements_rcvd = 0;
1797 vlib_node_runtime_t *error_node =
1798 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1800 from = vlib_frame_vector_args (frame);
1801 n_left_from = n_packets;
1802 next_index = node->cached_next_index;
1804 if (node->flags & VLIB_NODE_FLAG_TRACE)
1805 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1807 sizeof (icmp6_input_trace_t));
1809 while (n_left_from > 0)
1811 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1813 while (n_left_from > 0 && n_left_to_next > 0)
1817 ip6_radv_t *radv_info = 0;
1818 icmp6_router_advertisement_header_t *h0;
1819 u32 bi0, options_len0, sw_if_index0, next0, error0;
1821 bi0 = to_next[0] = from[0];
1826 n_left_to_next -= 1;
1828 p0 = vlib_get_buffer (vm, bi0);
1829 ip0 = vlib_buffer_get_current (p0);
1830 h0 = ip6_next_header (ip0);
1832 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1834 error0 = ICMP6_ERROR_NONE;
1835 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1837 /* Check that source address is link-local */
1838 error0 = (!ip6_address_is_link_local_unicast (&ip0->src_address)) ?
1839 ICMP6_ERROR_ROUTER_ADVERTISEMENT_SOURCE_NOT_LINK_LOCAL : error0;
1841 /* default is to drop */
1842 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1844 n_advertisements_rcvd++;
1846 if (error0 == ICMP6_ERROR_NONE)
1848 vnet_sw_interface_t *sw_if0;
1849 ethernet_interface_t *eth_if0;
1851 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1852 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1854 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1856 /* only support ethernet interface type for now */
1858 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1861 if (error0 == ICMP6_ERROR_NONE)
1865 /* look up the radv_t information for this interface */
1866 vec_validate_init_empty
1867 (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
1869 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1872 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1876 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1879 if (error0 == ICMP6_ERROR_NONE)
1881 /* validate advertised information */
1882 if ((h0->current_hop_limit && radv_info->curr_hop_limit)
1883 && (h0->current_hop_limit !=
1884 radv_info->curr_hop_limit))
1886 ip6_neighbor_syslog (vm, LOG_WARNING,
1887 "our AdvCurHopLimit on %U doesn't agree with %U",
1888 format_vnet_sw_if_index_name,
1895 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP)
1896 != radv_info->adv_managed_flag)
1898 ip6_neighbor_syslog (vm, LOG_WARNING,
1899 "our AdvManagedFlag on %U doesn't agree with %U",
1900 format_vnet_sw_if_index_name,
1907 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP)
1908 != radv_info->adv_other_flag)
1910 ip6_neighbor_syslog (vm, LOG_WARNING,
1911 "our AdvOtherConfigFlag on %U doesn't agree with %U",
1912 format_vnet_sw_if_index_name,
1919 time_in_msec_between_retransmitted_neighbor_solicitations
1921 adv_time_in_msec_between_retransmitted_neighbor_solicitations)
1923 time_in_msec_between_retransmitted_neighbor_solicitations
1925 clib_host_to_net_u32 (radv_info->
1926 adv_time_in_msec_between_retransmitted_neighbor_solicitations)))
1928 ip6_neighbor_syslog (vm, LOG_WARNING,
1929 "our AdvRetransTimer on %U doesn't agree with %U",
1930 format_vnet_sw_if_index_name,
1936 if ((h0->neighbor_reachable_time_in_msec &&
1937 radv_info->adv_neighbor_reachable_time_in_msec) &&
1938 (h0->neighbor_reachable_time_in_msec !=
1939 clib_host_to_net_u32
1940 (radv_info->adv_neighbor_reachable_time_in_msec)))
1942 ip6_neighbor_syslog (vm, LOG_WARNING,
1943 "our AdvReachableTime on %U doesn't agree with %U",
1944 format_vnet_sw_if_index_name,
1950 /* check for MTU or prefix options or .. */
1951 u8 *opt_hdr = (u8 *) (h0 + 1);
1952 while (options_len0 > 0)
1954 icmp6_neighbor_discovery_option_header_t *o0 =
1955 (icmp6_neighbor_discovery_option_header_t *)
1957 int opt_len = o0->n_data_u64s << 3;
1958 icmp6_neighbor_discovery_option_type_t option_type =
1961 if (options_len0 < 2)
1963 ip6_neighbor_syslog (vm, LOG_ERR,
1964 "malformed RA packet on %U from %U",
1965 format_vnet_sw_if_index_name,
1974 ip6_neighbor_syslog (vm, LOG_ERR,
1975 " zero length option in RA on %U from %U",
1976 format_vnet_sw_if_index_name,
1982 else if (opt_len > options_len0)
1984 ip6_neighbor_syslog (vm, LOG_ERR,
1985 "option length in RA packet greater than total length on %U from %U",
1986 format_vnet_sw_if_index_name,
1993 options_len0 -= opt_len;
1996 switch (option_type)
1998 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu:
2000 icmp6_neighbor_discovery_mtu_option_t *h =
2001 (icmp6_neighbor_discovery_mtu_option_t
2004 if (opt_len < sizeof (*h))
2007 if ((h->mtu && radv_info->adv_link_mtu) &&
2009 clib_host_to_net_u32
2010 (radv_info->adv_link_mtu)))
2012 ip6_neighbor_syslog (vm, LOG_WARNING,
2013 "our AdvLinkMTU on %U doesn't agree with %U",
2014 format_vnet_sw_if_index_name,
2022 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information:
2024 icmp6_neighbor_discovery_prefix_information_option_t
2026 (icmp6_neighbor_discovery_prefix_information_option_t
2029 /* validate advertised prefix options */
2030 ip6_radv_prefix_t *pr_info;
2031 u32 preferred, valid;
2033 if (opt_len < sizeof (*h))
2037 clib_net_to_host_u32 (h->preferred_time);
2038 valid = clib_net_to_host_u32 (h->valid_time);
2040 /* look for matching prefix - if we our advertising it, it better be consistant */
2042 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
2046 ip6_address_mask_from_width(&mask, pr_info->prefix_len);
2048 if(pr_info->enabled &&
2049 (pr_info->prefix_len == h->dst_address_length) &&
2050 ip6_address_is_equal_masked (&pr_info->prefix, &h->dst_address, &mask))
2053 if(!pr_info->decrement_lifetime_flag &&
2054 valid != pr_info->adv_valid_lifetime_in_secs)
2056 ip6_neighbor_syslog(vm, LOG_WARNING,
2057 "our ADV validlifetime on %U for %U does not agree with %U",
2058 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
2059 format_ip6_address, &h->dst_address);
2061 if(!pr_info->decrement_lifetime_flag &&
2062 preferred != pr_info->adv_pref_lifetime_in_secs)
2064 ip6_neighbor_syslog(vm, LOG_WARNING,
2065 "our ADV preferredlifetime on %U for %U does not agree with %U",
2066 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
2067 format_ip6_address, &h->dst_address);
2084 p0->error = error_node->errors[error0];
2086 if (error0 != ICMP6_ERROR_NONE)
2087 vlib_error_count (vm, error_node->node_index, error0, 1);
2089 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2090 to_next, n_left_to_next,
2094 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2097 /* Account for router advertisements sent. */
2098 vlib_error_count (vm, error_node->node_index,
2099 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_RX,
2100 n_advertisements_rcvd);
2102 return frame->n_vectors;
2106 * @brief Add a multicast Address to the advertised MLD set
2109 ip6_neighbor_add_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2111 ip6_mldp_group_t *mcast_group_info;
2114 /* lookup mldp info for this interface */
2115 p = mhash_get (&radv_info->address_to_mldp_index, addr);
2117 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2120 if (!mcast_group_info)
2124 pool_get (radv_info->mldp_group_pool, mcast_group_info);
2126 mi = mcast_group_info - radv_info->mldp_group_pool;
2127 mhash_set (&radv_info->address_to_mldp_index, addr, mi, /* old_value */
2130 mcast_group_info->type = 4;
2131 mcast_group_info->mcast_source_address_pool = 0;
2132 mcast_group_info->num_sources = 0;
2133 clib_memcpy (&mcast_group_info->mcast_address, addr,
2134 sizeof (ip6_address_t));
2139 * @brief Delete a multicast Address from the advertised MLD set
2142 ip6_neighbor_del_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2144 ip6_mldp_group_t *mcast_group_info;
2147 p = mhash_get (&radv_info->address_to_mldp_index, &addr);
2149 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2151 if (mcast_group_info)
2153 mhash_unset (&radv_info->address_to_mldp_index, &addr,
2155 pool_put (radv_info->mldp_group_pool, mcast_group_info);
2160 * @brief Add a multicast Address to the advertised MLD set
2163 ip6_neighbor_add_mld_grp (ip6_radv_t * a,
2164 ip6_multicast_address_scope_t scope,
2165 ip6_multicast_link_local_group_id_t group)
2169 ip6_set_reserved_multicast_address (&addr, scope, group);
2171 ip6_neighbor_add_mld_prefix (a, &addr);
2175 * @brief create and initialize router advertisement parameters with default
2176 * values for this intfc
2179 ip6_neighbor_sw_interface_add_del (vnet_main_t * vnm,
2180 u32 sw_if_index, u32 is_add)
2182 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2185 vnet_sw_interface_t *sw_if0;
2186 ethernet_interface_t *eth_if0 = 0;
2188 /* lookup radv container - ethernet interfaces only */
2189 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2190 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2191 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2196 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2198 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2202 a = pool_elt_at_index (nm->if_radv_pool, ri);
2206 ip6_radv_prefix_t *p;
2207 ip6_mldp_group_t *m;
2209 /* release the lock on the interface's mcast adj */
2210 adj_unlock (a->mcast_adj_index);
2212 /* clean up prefix and MDP pools */
2214 pool_flush(p, a->adv_prefixes_pool,
2216 mhash_unset (&a->address_to_prefix_index, &p->prefix, 0);
2218 pool_flush (m, a->mldp_group_pool,
2220 mhash_unset (&a->address_to_mldp_index, &m->mcast_address, 0);
2224 pool_free (a->mldp_group_pool);
2225 pool_free (a->adv_prefixes_pool);
2227 mhash_free (&a->address_to_prefix_index);
2228 mhash_free (&a->address_to_mldp_index);
2230 pool_put (nm->if_radv_pool, a);
2231 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ~0;
2239 vnet_hw_interface_t *hw_if0;
2241 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index);
2243 pool_get (nm->if_radv_pool, a);
2245 ri = a - nm->if_radv_pool;
2246 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ri;
2248 /* initialize default values (most of which are zero) */
2249 memset (a, 0, sizeof (a[0]));
2251 a->sw_if_index = sw_if_index;
2252 a->max_radv_interval = DEF_MAX_RADV_INTERVAL;
2253 a->min_radv_interval = DEF_MIN_RADV_INTERVAL;
2254 a->curr_hop_limit = DEF_CURR_HOP_LIMIT;
2255 a->adv_router_lifetime_in_sec = DEF_DEF_RTR_LIFETIME;
2257 /* send ll address source address option */
2258 a->adv_link_layer_address = 1;
2260 a->min_delay_between_radv = MIN_DELAY_BETWEEN_RAS;
2261 a->max_delay_between_radv = MAX_DELAY_BETWEEN_RAS;
2262 a->max_rtr_default_lifetime = MAX_DEF_RTR_LIFETIME;
2263 a->seed = (u32) clib_cpu_time_now ();
2264 (void) random_u32 (&a->seed);
2265 a->randomizer = clib_cpu_time_now ();
2266 (void) random_u64 (&a->randomizer);
2268 a->initial_adverts_count = MAX_INITIAL_RTR_ADVERTISEMENTS;
2269 a->initial_adverts_sent = a->initial_adverts_count - 1;
2270 a->initial_adverts_interval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
2272 /* deafult is to send */
2275 /* fill in radv_info for this interface that will be needed later */
2276 a->adv_link_mtu = hw_if0->max_l3_packet_bytes[VLIB_RX];
2278 clib_memcpy (a->link_layer_address, eth_if0->address, 6);
2280 /* fill in default link-local address (this may be overridden) */
2281 ip6_link_local_address_from_ethernet_address
2282 (&a->link_local_address, eth_if0->address);
2284 mhash_init (&a->address_to_prefix_index, sizeof (uword),
2285 sizeof (ip6_address_t));
2286 mhash_init (&a->address_to_mldp_index, sizeof (uword),
2287 sizeof (ip6_address_t));
2289 a->mcast_adj_index = adj_mcast_add_or_lock (FIB_PROTOCOL_IP6,
2293 /* add multicast groups we will always be reporting */
2294 ip6_neighbor_add_mld_grp (a,
2295 IP6_MULTICAST_SCOPE_link_local,
2296 IP6_MULTICAST_GROUP_ID_all_hosts);
2297 ip6_neighbor_add_mld_grp (a,
2298 IP6_MULTICAST_SCOPE_link_local,
2299 IP6_MULTICAST_GROUP_ID_all_routers);
2300 ip6_neighbor_add_mld_grp (a,
2301 IP6_MULTICAST_SCOPE_link_local,
2302 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2308 /* send an mldpv2 report */
2310 ip6_neighbor_send_mldpv2_report (u32 sw_if_index)
2312 vnet_main_t *vnm = vnet_get_main ();
2313 vlib_main_t *vm = vnm->vlib_main;
2314 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2315 vnet_sw_interface_t *sw_if0;
2316 ethernet_interface_t *eth_if0;
2320 ip6_radv_t *radv_info;
2330 icmp6_multicast_listener_report_header_t *rh0;
2331 icmp6_multicast_listener_report_packet_t *rp0;
2333 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2334 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
2335 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2337 if (!eth_if0 || !vnet_sw_interface_is_admin_up (vnm, sw_if_index))
2340 /* look up the radv_t information for this interface */
2341 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2344 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2349 /* send report now - build a mldpv2 report packet */
2350 n_allocated = vlib_buffer_alloc_from_free_list (vm,
2353 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2354 if (PREDICT_FALSE (n_allocated == 0))
2356 clib_warning ("buffer allocation failure");
2360 b0 = vlib_get_buffer (vm, bo0);
2362 /* adjust the sizeof the buffer to just include the ipv6 header */
2363 b0->current_length = sizeof (icmp6_multicast_listener_report_packet_t);
2365 payload_length = sizeof (icmp6_multicast_listener_report_header_t);
2367 b0->error = ICMP6_ERROR_NONE;
2369 rp0 = vlib_buffer_get_current (b0);
2370 ip0 = (ip6_header_t *) & rp0->ip;
2371 rh0 = (icmp6_multicast_listener_report_header_t *) & rp0->report_hdr;
2373 memset (rp0, 0x0, sizeof (icmp6_multicast_listener_report_packet_t));
2375 ip0->ip_version_traffic_class_and_flow_label =
2376 clib_host_to_net_u32 (0x6 << 28);
2378 ip0->protocol = IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS;
2379 /* for DEBUG - vnet driver won't seem to emit router alerts */
2380 /* ip0->protocol = IP_PROTOCOL_ICMP6; */
2383 rh0->icmp.type = ICMP6_multicast_listener_report_v2;
2385 /* source address MUST be the link-local address */
2386 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2387 ip0->src_address = radv_info->link_local_address;
2389 /* destination is all mldpv2 routers */
2390 ip6_set_reserved_multicast_address (&ip0->dst_address,
2391 IP6_MULTICAST_SCOPE_link_local,
2392 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2394 /* add reports here */
2395 ip6_mldp_group_t *m;
2396 int num_addr_records = 0;
2397 icmp6_multicast_address_record_t rr;
2399 /* fill in the hop-by-hop extension header (router alert) info */
2400 rh0->ext_hdr.next_hdr = IP_PROTOCOL_ICMP6;
2401 rh0->ext_hdr.n_data_u64s = 0;
2403 rh0->alert.type = IP6_MLDP_ALERT_TYPE;
2405 rh0->alert.value = 0;
2410 rh0->icmp.checksum = 0;
2413 pool_foreach (m, radv_info->mldp_group_pool,
2416 rr.aux_data_len_u32s = 0;
2417 rr.num_sources = clib_host_to_net_u16 (m->num_sources);
2418 clib_memcpy(&rr.mcast_addr, &m->mcast_address, sizeof(ip6_address_t));
2422 vlib_buffer_add_data
2423 (vm, vlib_buffer_get_free_list_index (b0), bo0,
2424 (void *)&rr, sizeof(icmp6_multicast_address_record_t));
2426 payload_length += sizeof( icmp6_multicast_address_record_t);
2431 rh0->num_addr_records = clib_host_to_net_u16 (num_addr_records);
2433 /* update lengths */
2434 ip0->payload_length = clib_host_to_net_u16 (payload_length);
2436 rh0->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0,
2438 ASSERT (bogus_length == 0);
2441 * OK to override w/ no regard for actual FIB, because
2442 * ip6-rewrite only looks at the adjacency.
2444 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
2445 vnet_main.local_interface_sw_if_index;
2447 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
2448 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
2450 vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite-mcast");
2452 f = vlib_get_frame_to_node (vm, node->index);
2453 to_next = vlib_frame_vector_args (f);
2457 vlib_put_frame_to_node (vm, node->index, f);
2462 VLIB_REGISTER_NODE (ip6_icmp_router_solicitation_node,static) =
2464 .function = icmp6_router_solicitation,
2465 .name = "icmp6-router-solicitation",
2467 .vector_size = sizeof (u32),
2469 .format_trace = format_icmp6_input_trace,
2471 .n_next_nodes = ICMP6_ROUTER_SOLICITATION_N_NEXT,
2473 [ICMP6_ROUTER_SOLICITATION_NEXT_DROP] = "ip6-drop",
2474 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW] = "ip6-rewrite-mcast",
2475 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX] = "interface-output",
2480 /* send a RA or update the timer info etc.. */
2482 ip6_neighbor_process_timer_event (vlib_main_t * vm,
2483 vlib_node_runtime_t * node,
2484 vlib_frame_t * frame)
2486 vnet_main_t *vnm = vnet_get_main ();
2487 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2488 ip6_radv_t *radv_info;
2489 vlib_frame_t *f = 0;
2490 u32 n_this_frame = 0;
2491 u32 n_left_to_next = 0;
2494 icmp6_router_solicitation_header_t *h0;
2496 f64 now = vlib_time_now (vm);
2498 /* Interface ip6 radv info list */
2500 pool_foreach (radv_info, nm->if_radv_pool,
2502 if( !vnet_sw_interface_is_admin_up (vnm, radv_info->sw_if_index))
2504 radv_info->initial_adverts_sent = radv_info->initial_adverts_count-1;
2505 radv_info->next_multicast_time = now;
2506 radv_info->last_multicast_time = now;
2507 radv_info->last_radv_time = 0;
2508 radv_info->all_routers_mcast = 0;
2512 /* Make sure that we've joined the all-routers multicast group */
2513 if(!radv_info->all_routers_mcast)
2515 /* send MDLP_REPORT_EVENT message */
2516 ip6_neighbor_send_mldpv2_report(radv_info->sw_if_index);
2517 radv_info->all_routers_mcast = 1;
2520 /* is it time to send a multicast RA on this interface? */
2521 if(radv_info->send_radv && (now >= radv_info->next_multicast_time))
2526 f64 rfn = (radv_info->max_radv_interval - radv_info->min_radv_interval) *
2527 random_f64 (&radv_info->seed) + radv_info->min_radv_interval;
2529 /* multicast send - compute next multicast send time */
2530 if( radv_info->initial_adverts_sent > 0)
2532 radv_info->initial_adverts_sent--;
2533 if(rfn > radv_info-> initial_adverts_interval)
2534 rfn = radv_info-> initial_adverts_interval;
2536 /* check to see if we are ceasing to send */
2537 if( radv_info->initial_adverts_sent == 0)
2538 if(radv_info->cease_radv)
2539 radv_info->send_radv = 0;
2542 radv_info->next_multicast_time = rfn + now;
2543 radv_info->last_multicast_time = now;
2545 /* send advert now - build a "solicted" router advert with unspecified source address */
2546 n_allocated = vlib_buffer_alloc_from_free_list
2547 (vm, &bo0, n_to_alloc, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2549 if (PREDICT_FALSE(n_allocated == 0))
2551 clib_warning ("buffer allocation failure");
2554 b0 = vlib_get_buffer (vm, bo0);
2555 b0->current_length = sizeof( icmp6_router_solicitation_header_t);
2556 b0->error = ICMP6_ERROR_NONE;
2557 vnet_buffer (b0)->sw_if_index[VLIB_RX] = radv_info->sw_if_index;
2559 h0 = vlib_buffer_get_current (b0);
2561 memset (h0, 0, sizeof (icmp6_router_solicitation_header_t));
2563 h0->ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2564 h0->ip.payload_length = clib_host_to_net_u16 (sizeof (icmp6_router_solicitation_header_t)
2565 - STRUCT_OFFSET_OF (icmp6_router_solicitation_header_t, neighbor));
2566 h0->ip.protocol = IP_PROTOCOL_ICMP6;
2567 h0->ip.hop_limit = 255;
2569 /* set src/dst address as "unspecified" this marks this packet as internally generated rather than recieved */
2570 h0->ip.src_address.as_u64[0] = 0;
2571 h0->ip.src_address.as_u64[1] = 0;
2573 h0->ip.dst_address.as_u64[0] = 0;
2574 h0->ip.dst_address.as_u64[1] = 0;
2576 h0->neighbor.icmp.type = ICMP6_router_solicitation;
2578 if (PREDICT_FALSE(f == 0))
2580 f = vlib_get_frame_to_node (vm, ip6_icmp_router_solicitation_node.index);
2581 to_next = vlib_frame_vector_args (f);
2582 n_left_to_next = VLIB_FRAME_SIZE;
2591 if (PREDICT_FALSE(n_left_to_next == 0))
2593 f->n_vectors = n_this_frame;
2594 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2603 ASSERT (n_this_frame);
2604 f->n_vectors = n_this_frame;
2605 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2611 ip6_icmp_neighbor_discovery_event_process (vlib_main_t * vm,
2612 vlib_node_runtime_t * node,
2613 vlib_frame_t * frame)
2616 ip6_icmp_neighbor_discovery_event_data_t *event_data;
2618 /* init code here */
2622 vlib_process_wait_for_event_or_clock (vm, 1. /* seconds */ );
2624 event_data = vlib_process_get_event_data (vm, &event_type);
2628 /* No events found: timer expired. */
2629 /* process interface list and send RAs as appropriate, update timer info */
2630 ip6_neighbor_process_timer_event (vm, node, frame);
2637 case ICMP6_ND_EVENT_INIT:
2648 _vec_len (event_data) = 0;
2651 return frame->n_vectors;
2655 VLIB_REGISTER_NODE (ip6_icmp_router_advertisement_node,static) =
2657 .function = icmp6_router_advertisement,
2658 .name = "icmp6-router-advertisement",
2660 .vector_size = sizeof (u32),
2662 .format_trace = format_icmp6_input_trace,
2671 vlib_node_registration_t ip6_icmp_neighbor_discovery_event_node = {
2673 .function = ip6_icmp_neighbor_discovery_event_process,
2674 .name = "ip6-icmp-neighbor-discovery-event-process",
2675 .type = VLIB_NODE_TYPE_PROCESS,
2679 icmp6_neighbor_solicitation (vlib_main_t * vm,
2680 vlib_node_runtime_t * node, vlib_frame_t * frame)
2682 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
2683 /* is_solicitation */
2688 icmp6_neighbor_advertisement (vlib_main_t * vm,
2689 vlib_node_runtime_t * node,
2690 vlib_frame_t * frame)
2692 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
2693 /* is_solicitation */
2698 VLIB_REGISTER_NODE (ip6_icmp_neighbor_solicitation_node,static) =
2700 .function = icmp6_neighbor_solicitation,
2701 .name = "icmp6-neighbor-solicitation",
2703 .vector_size = sizeof (u32),
2705 .format_trace = format_icmp6_input_trace,
2707 .n_next_nodes = ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
2709 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP] = "ip6-drop",
2710 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY] = "interface-output",
2716 VLIB_REGISTER_NODE (ip6_icmp_neighbor_advertisement_node,static) =
2718 .function = icmp6_neighbor_advertisement,
2719 .name = "icmp6-neighbor-advertisement",
2721 .vector_size = sizeof (u32),
2723 .format_trace = format_icmp6_input_trace,
2732 /* API support functions */
2734 ip6_neighbor_ra_config (vlib_main_t * vm, u32 sw_if_index,
2735 u8 suppress, u8 managed, u8 other,
2736 u8 ll_option, u8 send_unicast, u8 cease,
2737 u8 use_lifetime, u32 lifetime,
2738 u32 initial_count, u32 initial_interval,
2739 u32 max_interval, u32 min_interval, u8 is_no)
2741 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2745 /* look up the radv_t information for this interface */
2746 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2748 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2749 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
2754 ip6_radv_t *radv_info;
2755 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2757 if ((max_interval != 0) && (min_interval == 0))
2758 min_interval = .75 * max_interval;
2762 0) ? ((is_no) ? DEF_MAX_RADV_INTERVAL : max_interval) :
2763 radv_info->max_radv_interval;
2766 0) ? ((is_no) ? DEF_MIN_RADV_INTERVAL : min_interval) :
2767 radv_info->min_radv_interval;
2770 0) ? ((is_no) ? DEF_DEF_RTR_LIFETIME : lifetime) :
2771 radv_info->adv_router_lifetime_in_sec;
2775 if (lifetime > MAX_DEF_RTR_LIFETIME)
2776 lifetime = MAX_DEF_RTR_LIFETIME;
2778 if (lifetime <= max_interval)
2779 return VNET_API_ERROR_INVALID_VALUE;
2782 if (min_interval != 0)
2784 if ((min_interval > .75 * max_interval) || (min_interval < 3))
2785 return VNET_API_ERROR_INVALID_VALUE;
2788 if ((initial_count > MAX_INITIAL_RTR_ADVERTISEMENTS) ||
2789 (initial_interval > MAX_INITIAL_RTR_ADVERT_INTERVAL))
2790 return VNET_API_ERROR_INVALID_VALUE;
2793 if "flag" is set and is_no is true then restore default value else set value corresponding to "flag"
2794 if "flag" is clear don't change corresponding value
2796 radv_info->send_radv =
2797 (suppress != 0) ? ((is_no != 0) ? 1 : 0) : radv_info->send_radv;
2798 radv_info->adv_managed_flag =
2799 (managed != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_managed_flag;
2800 radv_info->adv_other_flag =
2801 (other != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_other_flag;
2802 radv_info->adv_link_layer_address =
2804 0) ? ((is_no) ? 1 : 0) : radv_info->adv_link_layer_address;
2805 radv_info->send_unicast =
2806 (send_unicast != 0) ? ((is_no) ? 0 : 1) : radv_info->send_unicast;
2807 radv_info->cease_radv =
2808 (cease != 0) ? ((is_no) ? 0 : 1) : radv_info->cease_radv;
2810 radv_info->min_radv_interval = min_interval;
2811 radv_info->max_radv_interval = max_interval;
2812 radv_info->adv_router_lifetime_in_sec = lifetime;
2814 radv_info->initial_adverts_count =
2816 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERTISEMENTS : initial_count) :
2817 radv_info->initial_adverts_count;
2818 radv_info->initial_adverts_interval =
2819 (initial_interval !=
2820 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERT_INTERVAL : initial_interval) :
2821 radv_info->initial_adverts_interval;
2824 if ((cease != 0) && (is_no))
2825 radv_info->send_radv = 1;
2827 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
2828 radv_info->next_multicast_time = vlib_time_now (vm);
2829 radv_info->last_multicast_time = vlib_time_now (vm);
2830 radv_info->last_radv_time = 0;
2836 ip6_neighbor_ra_prefix (vlib_main_t * vm, u32 sw_if_index,
2837 ip6_address_t * prefix_addr, u8 prefix_len,
2838 u8 use_default, u32 val_lifetime, u32 pref_lifetime,
2839 u8 no_advertise, u8 off_link, u8 no_autoconfig,
2840 u8 no_onlink, u8 is_no)
2842 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2847 /* look up the radv_t information for this interface */
2848 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2851 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2853 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
2857 f64 now = vlib_time_now (vm);
2858 ip6_radv_t *radv_info;
2859 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2861 /* prefix info add, delete or update */
2862 ip6_radv_prefix_t *prefix;
2864 /* lookup prefix info for this address on this interface */
2865 uword *p = mhash_get (&radv_info->address_to_prefix_index, prefix_addr);
2867 prefix = p ? pool_elt_at_index (radv_info->adv_prefixes_pool, p[0]) : 0;
2873 return VNET_API_ERROR_INVALID_VALUE; /* invalid prefix */
2875 if (prefix->prefix_len != prefix_len)
2876 return VNET_API_ERROR_INVALID_VALUE_2;
2878 /* FIXME - Should the DP do this or the CP ? */
2879 /* do specific delete processing here before returning */
2880 /* try to remove from routing table */
2882 mhash_unset (&radv_info->address_to_prefix_index, prefix_addr,
2884 pool_put (radv_info->adv_prefixes_pool, prefix);
2886 radv_info->initial_adverts_sent =
2887 radv_info->initial_adverts_count - 1;
2888 radv_info->next_multicast_time = vlib_time_now (vm);
2889 radv_info->last_multicast_time = vlib_time_now (vm);
2890 radv_info->last_radv_time = 0;
2894 /* adding or changing */
2899 pool_get (radv_info->adv_prefixes_pool, prefix);
2900 pi = prefix - radv_info->adv_prefixes_pool;
2901 mhash_set (&radv_info->address_to_prefix_index, prefix_addr, pi,
2904 memset (prefix, 0x0, sizeof (ip6_radv_prefix_t));
2906 prefix->prefix_len = prefix_len;
2907 clib_memcpy (&prefix->prefix, prefix_addr, sizeof (ip6_address_t));
2909 /* initialize default values */
2910 prefix->adv_on_link_flag = 1; /* L bit set */
2911 prefix->adv_autonomous_flag = 1; /* A bit set */
2912 prefix->adv_valid_lifetime_in_secs = DEF_ADV_VALID_LIFETIME;
2913 prefix->adv_pref_lifetime_in_secs = DEF_ADV_PREF_LIFETIME;
2914 prefix->enabled = 1;
2915 prefix->decrement_lifetime_flag = 1;
2916 prefix->deprecated_prefix_flag = 1;
2920 /* FIXME - Should the DP do this or the CP ? */
2921 /* insert prefix into routing table as a connected prefix */
2930 if (prefix->prefix_len != prefix_len)
2931 return VNET_API_ERROR_INVALID_VALUE_2;
2935 /* FIXME - Should the DP do this or the CP ? */
2936 /* remove from routing table if already there */
2940 if ((val_lifetime == ~0) || (pref_lifetime == ~0))
2942 prefix->adv_valid_lifetime_in_secs = ~0;
2943 prefix->adv_pref_lifetime_in_secs = ~0;
2944 prefix->decrement_lifetime_flag = 0;
2948 prefix->adv_valid_lifetime_in_secs = val_lifetime;;
2949 prefix->adv_pref_lifetime_in_secs = pref_lifetime;
2952 /* copy remaining */
2953 prefix->enabled = !(no_advertise != 0);
2954 prefix->adv_on_link_flag = !((off_link != 0) || (no_onlink != 0));
2955 prefix->adv_autonomous_flag = !(no_autoconfig != 0);
2959 /* fill in the expiration times */
2960 prefix->valid_lifetime_expires =
2961 now + prefix->adv_valid_lifetime_in_secs;
2962 prefix->pref_lifetime_expires = now + prefix->adv_pref_lifetime_in_secs;
2964 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
2965 radv_info->next_multicast_time = vlib_time_now (vm);
2966 radv_info->last_multicast_time = vlib_time_now (vm);
2967 radv_info->last_radv_time = 0;
2973 ip6_neighbor_cmd (vlib_main_t * vm, unformat_input_t * main_input,
2974 vlib_cli_command_t * cmd)
2976 vnet_main_t *vnm = vnet_get_main ();
2977 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2978 clib_error_t *error = 0;
2980 u8 suppress = 0, managed = 0, other = 0;
2981 u8 suppress_ll_option = 0, send_unicast = 0, cease = 0;
2982 u8 use_lifetime = 0;
2983 u32 sw_if_index, ra_lifetime = 0, ra_initial_count =
2984 0, ra_initial_interval = 0;
2985 u32 ra_max_interval = 0, ra_min_interval = 0;
2987 unformat_input_t _line_input, *line_input = &_line_input;
2988 vnet_sw_interface_t *sw_if0;
2990 int add_radv_info = 1;
2991 __attribute__ ((unused)) ip6_radv_t *radv_info = 0;
2992 ip6_address_t ip6_addr;
2996 /* Get a line of input. */
2997 if (!unformat_user (main_input, unformat_line_input, line_input))
3000 /* get basic radv info for this interface */
3001 if (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3004 if (unformat_user (line_input,
3005 unformat_vnet_sw_interface, vnm, &sw_if_index))
3008 ethernet_interface_t *eth_if0 = 0;
3010 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
3011 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
3013 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
3018 clib_error_return (0, "Interface must be of ethernet type");
3022 /* look up the radv_t information for this interface */
3023 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3026 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3030 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3034 error = clib_error_return (0, "unknown interface %U'",
3035 format_unformat_error, line_input);
3041 error = clib_error_return (0, "invalid interface name %U'",
3042 format_unformat_error, line_input);
3047 /* get the rest of the command */
3048 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3050 if (unformat (line_input, "no"))
3052 else if (unformat (line_input, "prefix %U/%d",
3053 unformat_ip6_address, &ip6_addr, &addr_len))
3058 else if (unformat (line_input, "ra-managed-config-flag"))
3063 else if (unformat (line_input, "ra-other-config-flag"))
3068 else if (unformat (line_input, "ra-suppress") ||
3069 unformat (line_input, "ra-surpress"))
3074 else if (unformat (line_input, "ra-suppress-link-layer") ||
3075 unformat (line_input, "ra-surpress-link-layer"))
3077 suppress_ll_option = 1;
3080 else if (unformat (line_input, "ra-send-unicast"))
3085 else if (unformat (line_input, "ra-lifetime"))
3087 if (!unformat (line_input, "%d", &ra_lifetime))
3089 error = unformat_parse_error (line_input);
3095 else if (unformat (line_input, "ra-initial"))
3098 (line_input, "%d %d", &ra_initial_count, &ra_initial_interval))
3100 error = unformat_parse_error (line_input);
3105 else if (unformat (line_input, "ra-interval"))
3107 if (!unformat (line_input, "%d", &ra_max_interval))
3109 error = unformat_parse_error (line_input);
3113 if (!unformat (line_input, "%d", &ra_min_interval))
3114 ra_min_interval = 0;
3117 else if (unformat (line_input, "ra-cease"))
3124 error = unformat_parse_error (line_input);
3131 ip6_neighbor_ra_config (vm, sw_if_index,
3132 suppress, managed, other,
3133 suppress_ll_option, send_unicast, cease,
3134 use_lifetime, ra_lifetime,
3135 ra_initial_count, ra_initial_interval,
3136 ra_max_interval, ra_min_interval, is_no);
3140 u32 valid_lifetime_in_secs = 0;
3141 u32 pref_lifetime_in_secs = 0;
3142 u8 use_prefix_default_values = 0;
3143 u8 no_advertise = 0;
3145 u8 no_autoconfig = 0;
3148 /* get the rest of the command */
3149 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3151 if (unformat (line_input, "default"))
3153 use_prefix_default_values = 1;
3156 else if (unformat (line_input, "infinite"))
3158 valid_lifetime_in_secs = ~0;
3159 pref_lifetime_in_secs = ~0;
3162 else if (unformat (line_input, "%d %d", &valid_lifetime_in_secs,
3163 &pref_lifetime_in_secs))
3170 /* get the rest of the command */
3171 while (!use_prefix_default_values &&
3172 unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3174 if (unformat (line_input, "no-advertise"))
3176 else if (unformat (line_input, "off-link"))
3178 else if (unformat (line_input, "no-autoconfig"))
3180 else if (unformat (line_input, "no-onlink"))
3184 error = unformat_parse_error (line_input);
3189 ip6_neighbor_ra_prefix (vm, sw_if_index,
3190 &ip6_addr, addr_len,
3191 use_prefix_default_values,
3192 valid_lifetime_in_secs,
3193 pref_lifetime_in_secs,
3195 off_link, no_autoconfig, no_onlink, is_no);
3199 unformat_free (line_input);
3205 ip6_print_addrs (vlib_main_t * vm, u32 * addrs)
3207 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3210 for (i = 0; i < vec_len (addrs); i++)
3212 ip_interface_address_t *a =
3213 pool_elt_at_index (lm->if_address_pool, addrs[i]);
3214 ip6_address_t *address = ip_interface_address_get_address (lm, a);
3216 vlib_cli_output (vm, "\t\t%U/%d",
3217 format_ip6_address, address, a->address_length);
3221 static clib_error_t *
3222 show_ip6_interface_cmd (vlib_main_t * vm,
3223 unformat_input_t * input, vlib_cli_command_t * cmd)
3225 vnet_main_t *vnm = vnet_get_main ();
3226 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3227 clib_error_t *error = 0;
3232 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3236 /* look up the radv_t information for this interface */
3237 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3240 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3244 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3245 ip6_radv_t *radv_info;
3246 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3248 vlib_cli_output (vm, "%U is admin %s\n",
3249 format_vnet_sw_interface_name, vnm,
3250 vnet_get_sw_interface (vnm, sw_if_index),
3251 (vnet_sw_interface_is_admin_up (vnm, sw_if_index) ?
3255 u32 *link_scope = 0, *global_scope = 0;
3256 u32 *local_scope = 0, *unknown_scope = 0;
3257 ip_interface_address_t *a;
3259 vec_validate_init_empty (lm->if_address_pool_index_by_sw_if_index,
3261 ai = lm->if_address_pool_index_by_sw_if_index[sw_if_index];
3263 while (ai != (u32) ~ 0)
3265 a = pool_elt_at_index (lm->if_address_pool, ai);
3266 ip6_address_t *address =
3267 ip_interface_address_get_address (lm, a);
3269 if (ip6_address_is_link_local_unicast (address))
3270 vec_add1 (link_scope, ai);
3271 else if (ip6_address_is_global_unicast (address))
3272 vec_add1 (global_scope, ai);
3273 else if (ip6_address_is_local_unicast (address))
3274 vec_add1 (local_scope, ai);
3276 vec_add1 (unknown_scope, ai);
3278 ai = a->next_this_sw_interface;
3281 if (vec_len (link_scope))
3283 vlib_cli_output (vm, "\tLink-local address(es):\n");
3284 ip6_print_addrs (vm, link_scope);
3285 vec_free (link_scope);
3288 if (vec_len (local_scope))
3290 vlib_cli_output (vm, "\tLocal unicast address(es):\n");
3291 ip6_print_addrs (vm, local_scope);
3292 vec_free (local_scope);
3295 if (vec_len (global_scope))
3297 vlib_cli_output (vm, "\tGlobal unicast address(es):\n");
3298 ip6_print_addrs (vm, global_scope);
3299 vec_free (global_scope);
3302 if (vec_len (unknown_scope))
3304 vlib_cli_output (vm, "\tOther-scope address(es):\n");
3305 ip6_print_addrs (vm, unknown_scope);
3306 vec_free (unknown_scope);
3309 vlib_cli_output (vm, "\tLink-local address(es):\n");
3310 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
3311 &radv_info->link_local_address);
3313 vlib_cli_output (vm, "\tJoined group address(es):\n");
3314 ip6_mldp_group_t *m;
3316 pool_foreach (m, radv_info->mldp_group_pool,
3318 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
3323 vlib_cli_output (vm, "\tAdvertised Prefixes:\n");
3324 ip6_radv_prefix_t *p;
3326 pool_foreach (p, radv_info->adv_prefixes_pool,
3328 vlib_cli_output (vm, "\t\tprefix %U, length %d\n",
3329 format_ip6_address, &p->prefix, p->prefix_len);
3333 vlib_cli_output (vm, "\tMTU is %d\n", radv_info->adv_link_mtu);
3334 vlib_cli_output (vm, "\tICMP error messages are unlimited\n");
3335 vlib_cli_output (vm, "\tICMP redirects are disabled\n");
3336 vlib_cli_output (vm, "\tICMP unreachables are not sent\n");
3337 vlib_cli_output (vm, "\tND DAD is disabled\n");
3338 //vlib_cli_output (vm, "\tND reachable time is %d milliseconds\n",);
3339 vlib_cli_output (vm, "\tND advertised reachable time is %d\n",
3340 radv_info->adv_neighbor_reachable_time_in_msec);
3341 vlib_cli_output (vm,
3342 "\tND advertised retransmit interval is %d (msec)\n",
3344 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
3346 u32 ra_interval = radv_info->max_radv_interval;
3347 u32 ra_interval_min = radv_info->min_radv_interval;
3348 vlib_cli_output (vm,
3349 "\tND router advertisements are sent every %d seconds (min interval is %d)\n",
3350 ra_interval, ra_interval_min);
3351 vlib_cli_output (vm,
3352 "\tND router advertisements live for %d seconds\n",
3353 radv_info->adv_router_lifetime_in_sec);
3354 vlib_cli_output (vm,
3355 "\tHosts %s stateless autoconfig for addresses\n",
3356 (radv_info->adv_managed_flag) ? "use" :
3358 vlib_cli_output (vm, "\tND router advertisements sent %d\n",
3359 radv_info->n_advertisements_sent);
3360 vlib_cli_output (vm, "\tND router solicitations received %d\n",
3361 radv_info->n_solicitations_rcvd);
3362 vlib_cli_output (vm, "\tND router solicitations dropped %d\n",
3363 radv_info->n_solicitations_dropped);
3367 error = clib_error_return (0, "IPv6 not enabled on interface",
3368 format_unformat_error, input);
3376 * This command is used to display various IPv6 attributes on a given
3380 * Example of how to display IPv6 settings:
3381 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
3382 * GigabitEthernet2/0/0 is admin up
3383 * Link-local address(es):
3385 * Joined group address(es):
3390 * Advertised Prefixes:
3391 * prefix fe80::fe:28ff:fe9c:75b3, length 64
3393 * ICMP error messages are unlimited
3394 * ICMP redirects are disabled
3395 * ICMP unreachables are not sent
3396 * ND DAD is disabled
3397 * ND advertised reachable time is 0
3398 * ND advertised retransmit interval is 0 (msec)
3399 * ND router advertisements are sent every 200 seconds (min interval is 150)
3400 * ND router advertisements live for 600 seconds
3401 * Hosts use stateless autoconfig for addresses
3402 * ND router advertisements sent 19336
3403 * ND router solicitations received 0
3404 * ND router solicitations dropped 0
3406 * Example of output if IPv6 is not enabled on the interface:
3407 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
3408 * show ip6 interface: IPv6 not enabled on interface
3412 VLIB_CLI_COMMAND (show_ip6_interface_command, static) =
3414 .path = "show ip6 interface",
3415 .function = show_ip6_interface_cmd,
3416 .short_help = "show ip6 interface <interface>",
3421 disable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
3423 clib_error_t *error = 0;
3424 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3427 /* look up the radv_t information for this interface */
3428 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3430 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3432 /* if not created - do nothing */
3435 ip6_radv_t *radv_info;
3437 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3439 /* check radv_info ref count for other ip6 addresses on this interface */
3440 /* This implicitly excludes the link local address */
3441 if (radv_info->ref_count == 0)
3443 /* essentially "disables" ipv6 on this interface */
3444 ip6_ll_prefix_t ilp = {
3445 .ilp_addr = radv_info->link_local_address,
3446 .ilp_sw_if_index = sw_if_index,
3448 ip6_ll_table_entry_delete (&ilp);
3449 ip6_sw_interface_enable_disable (sw_if_index, 0);
3450 ip6_mfib_interface_enable_disable (sw_if_index, 0);
3451 ip6_neighbor_sw_interface_add_del (vnet_get_main (), sw_if_index,
3459 ip6_interface_enabled (vlib_main_t * vm, u32 sw_if_index)
3461 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3464 /* look up the radv_t information for this interface */
3465 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3468 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3474 enable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
3476 clib_error_t *error = 0;
3477 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3481 /* look up the radv_t information for this interface */
3482 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3485 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3487 /* if not created yet */
3490 vnet_main_t *vnm = vnet_get_main ();
3491 vnet_sw_interface_t *sw_if0;
3493 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
3494 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
3496 ethernet_interface_t *eth_if0;
3499 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
3502 /* create radv_info. for this interface. This holds all the info needed for router adverts */
3504 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, is_add);
3508 ip6_radv_t *radv_info;
3509 ip6_address_t link_local_address;
3511 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3513 ip6_link_local_address_from_ethernet_mac_address
3514 (&link_local_address, eth_if0->address);
3516 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index);
3517 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_SUB ||
3518 sw_if0->type == VNET_SW_INTERFACE_TYPE_P2P)
3520 /* make up an interface id */
3524 link_local_address.as_u64[0] = radv_info->randomizer;
3527 md5_add (&m, &link_local_address, 16);
3528 md5_finish (&m, digest);
3530 clib_memcpy (&link_local_address, digest, 16);
3532 radv_info->randomizer = link_local_address.as_u64[0];
3534 link_local_address.as_u64[0] =
3535 clib_host_to_net_u64 (0xFE80000000000000ULL);
3537 link_local_address.as_u8[8] &= 0xfd;
3540 ip6_ll_prefix_t ilp = {
3541 .ilp_addr = link_local_address,
3542 .ilp_sw_if_index = sw_if_index,
3545 ip6_ll_table_entry_update (&ilp, FIB_ROUTE_PATH_LOCAL);
3548 /* essentially "enables" ipv6 on this interface */
3549 ip6_mfib_interface_enable_disable (sw_if_index, 1);
3550 ip6_sw_interface_enable_disable (sw_if_index, 1);
3554 radv_info->link_local_address = link_local_address;
3564 ip6_get_ll_address (u32 sw_if_index, ip6_address_t * addr)
3566 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3567 ip6_radv_t *radv_info;
3570 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) < sw_if_index)
3573 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3578 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3579 *addr = radv_info->link_local_address;
3584 static clib_error_t *
3585 enable_ip6_interface_cmd (vlib_main_t * vm,
3586 unformat_input_t * input, vlib_cli_command_t * cmd)
3588 vnet_main_t *vnm = vnet_get_main ();
3589 clib_error_t *error = 0;
3594 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3596 enable_ip6_interface (vm, sw_if_index);
3600 error = clib_error_return (0, "unknown interface\n'",
3601 format_unformat_error, input);
3608 * This command is used to enable IPv6 on a given interface.
3611 * Example of how enable IPv6 on a given interface:
3612 * @cliexcmd{enable ip6 interface GigabitEthernet2/0/0}
3615 VLIB_CLI_COMMAND (enable_ip6_interface_command, static) =
3617 .path = "enable ip6 interface",
3618 .function = enable_ip6_interface_cmd,
3619 .short_help = "enable ip6 interface <interface>",
3623 static clib_error_t *
3624 disable_ip6_interface_cmd (vlib_main_t * vm,
3625 unformat_input_t * input, vlib_cli_command_t * cmd)
3627 vnet_main_t *vnm = vnet_get_main ();
3628 clib_error_t *error = 0;
3633 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3635 error = disable_ip6_interface (vm, sw_if_index);
3639 error = clib_error_return (0, "unknown interface\n'",
3640 format_unformat_error, input);
3647 * This command is used to disable IPv6 on a given interface.
3650 * Example of how disable IPv6 on a given interface:
3651 * @cliexcmd{disable ip6 interface GigabitEthernet2/0/0}
3654 VLIB_CLI_COMMAND (disable_ip6_interface_command, static) =
3656 .path = "disable ip6 interface",
3657 .function = disable_ip6_interface_cmd,
3658 .short_help = "disable ip6 interface <interface>",
3663 * This command is used to configure the neighbor discovery
3664 * parameters on a given interface. Use the '<em>show ip6 interface</em>'
3665 * command to display some of the current neighbor discovery parameters
3666 * on a given interface. This command has three formats:
3669 * <b>Format 1 - Router Advertisement Options:</b> (Only one can be entered in a single command)
3671 * '<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>'
3675 * <em>[no] ra-managed-config-flag</em> - Advertises in ICMPv6
3676 * router-advertisement messages to use stateful address
3677 * auto-configuration to obtain address information (sets the M-bit).
3678 * Default is the M-bit is not set and the '<em>no</em>' option
3679 * returns it to this default state.
3681 * <em>[no] ra-other-config-flag</em> - Indicates in ICMPv6
3682 * router-advertisement messages that hosts use stateful auto
3683 * configuration to obtain nonaddress related information (sets
3684 * the O-bit). Default is the O-bit is not set and the '<em>no</em>'
3685 * option returns it to this default state.
3687 * <em>[no] ra-suppress</em> - Disables sending ICMPv6 router-advertisement
3688 * messages. The '<em>no</em>' option implies to enable sending ICMPv6
3689 * router-advertisement messages.
3691 * <em>[no] ra-suppress-link-layer</em> - Indicates not to include the
3692 * optional source link-layer address in the ICMPv6 router-advertisement
3693 * messages. Default is to include the optional source link-layer address
3694 * and the '<em>no</em>' option returns it to this default state.
3696 * <em>[no] ra-send-unicast</em> - Use the source address of the
3697 * router-solicitation message if availiable. The default is to use
3698 * multicast address of all nodes, and the '<em>no</em>' option returns
3699 * it to this default state.
3701 * <em>[no] ra-lifetime <lifetime></em> - Advertises the lifetime of a
3702 * default router in ICMPv6 router-advertisement messages. The range is
3703 * from 0 to 9000 seconds. '<em><lifetime></em>' must be greater than
3704 * '<em><max-interval></em>'. The default value is 600 seconds and the
3705 * '<em>no</em>' option returns it to this default value.
3707 * <em>[no] ra-initial <cnt> <interval></em> - Number of initial ICMPv6
3708 * router-advertisement messages sent and the interval between each
3709 * message. Range for count is 1 - 3 and default is 3. Range for interval
3710 * is 1 to 16 seconds, and default is 16 seconds. The '<em>no</em>' option
3711 * returns both to their default value.
3713 * <em>[no] ra-interval <max-interval> [<min-interval>]</em> - Configures the
3714 * interval between sending ICMPv6 router-advertisement messages. The
3715 * range for max-interval is from 4 to 200 seconds. min-interval can not
3716 * be more than 75% of max-interval. If not set, min-interval will be
3717 * set to 75% of max-interval. The range for min-interval is from 3 to
3718 * 150 seconds. The '<em>no</em>' option returns both to their default
3721 * <em>[no] ra-cease</em> - Cease sending ICMPv6 router-advertisement messages.
3722 * The '<em>no</em>' options implies to start (or restart) sending
3723 * ICMPv6 router-advertisement messages.
3726 * <b>Format 2 - Prefix Options:</b>
3728 * '<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>'
3732 * <em>no</em> - All additional flags are ignored and the prefix is deleted.
3734 * <em><valid-lifetime> <pref-lifetime></em> - '<em><valid-lifetime></em>' is the
3735 * length of time in seconds during what the prefix is valid for the purpose of
3736 * on-link determination. Range is 7203 to 2592000 seconds and default is 2592000
3737 * seconds (30 days). '<em><pref-lifetime></em>' is the prefered-lifetime and is the
3738 * length of time in seconds during what addresses generated from the prefix remain
3739 * preferred. Range is 0 to 604800 seconds and default is 604800 seconds (7 days).
3741 * <em>infinite</em> - Both '<em><valid-lifetime></em>' and '<em><<pref-lifetime></em>'
3742 * are inifinte, no timeout.
3744 * <em>no-advertise</em> - Do not send full router address in prefix
3745 * advertisement. Default is to advertise (i.e. - This flag is off by default).
3747 * <em>off-link</em> - Prefix is off-link, clear L-bit in packet. Default is on-link
3748 * (i.e. - This flag is off and L-bit in packet is set by default and this prefix can
3749 * be used for on-link determination). '<em>no-onlink</em>' also controls the L-bit.
3751 * <em>no-autoconfig</em> - Do not use prefix for autoconfiguration, clear A-bit in packet.
3752 * Default is autoconfig (i.e. - This flag is off and A-bit in packet is set by default.
3754 * <em>no-onlink</em> - Do not use prefix for onlink determination, clear L-bit in packet.
3755 * Default is on-link (i.e. - This flag is off and L-bit in packet is set by default and
3756 * this prefix can be used for on-link determination). '<em>off-link</em>' also controls
3760 * <b>Format 3: - Default of Prefix:</b>
3762 * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> default</b></em>'
3764 * When a new prefix is added (or existing one is being overwritten) <em>default</em>
3765 * uses default values for the prefix. If <em>no</em> is used, the <em>default</em>
3766 * is ignored and the prefix is deleted.
3770 * Example of how set a router advertisement option:
3771 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 ra-interval 100 20}
3772 * Example of how to add a prefix:
3773 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 prefix fe80::fe:28ff:fe9c:75b3/64 infinite no-advertise}
3774 * Example of how to delete a prefix:
3775 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 no prefix fe80::fe:28ff:fe9c:75b3/64}
3778 VLIB_CLI_COMMAND (ip6_nd_command, static) =
3781 .short_help = "ip6 nd <interface> ...",
3782 .function = ip6_neighbor_cmd,
3787 set_ip6_link_local_address (vlib_main_t * vm,
3788 u32 sw_if_index, ip6_address_t * address)
3790 clib_error_t *error = 0;
3791 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3793 ip6_radv_t *radv_info;
3794 vnet_main_t *vnm = vnet_get_main ();
3796 if (!ip6_address_is_link_local_unicast (address))
3798 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_LINK_LOCAL;
3799 return (error = clib_error_return (0, "address not link-local",
3800 format_unformat_error));
3803 /* call enable ipv6 */
3804 enable_ip6_interface (vm, sw_if_index);
3806 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3810 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3812 /* save if link local address (overwrite default) */
3814 /* delete the old one */
3815 error = ip6_add_del_interface_address (vm, sw_if_index,
3816 &radv_info->link_local_address,
3817 128, 1 /* is_del */ );
3821 /* add the new one */
3822 error = ip6_add_del_interface_address (vm, sw_if_index,
3828 radv_info->link_local_address = *address;
3834 vnm->api_errno = VNET_API_ERROR_IP6_NOT_ENABLED;
3835 error = clib_error_return (0, "ip6 not enabled for interface",
3836 format_unformat_error);
3842 set_ip6_link_local_address_cmd (vlib_main_t * vm,
3843 unformat_input_t * input,
3844 vlib_cli_command_t * cmd)
3846 vnet_main_t *vnm = vnet_get_main ();
3847 clib_error_t *error = 0;
3849 ip6_address_t ip6_addr;
3851 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3853 /* get the rest of the command */
3854 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3856 if (unformat (input, "%U", unformat_ip6_address, &ip6_addr))
3859 return (unformat_parse_error (input));
3862 error = set_ip6_link_local_address (vm, sw_if_index, &ip6_addr);
3867 * This command is used to assign an IPv6 Link-local address to an
3868 * interface. This command will enable IPv6 on an interface if it
3869 * is not already enabled. Use the '<em>show ip6 interface</em>' command
3870 * to display the assigned Link-local address.
3873 * Example of how to assign an IPv6 Link-local address to an interface:
3874 * @cliexcmd{set ip6 link-local address GigabitEthernet2/0/0 FE80::AB8}
3877 VLIB_CLI_COMMAND (set_ip6_link_local_address_command, static) =
3879 .path = "set ip6 link-local address",
3880 .short_help = "set ip6 link-local address <interface> <ip6-address>",
3881 .function = set_ip6_link_local_address_cmd,
3886 * @brief callback when an interface address is added or deleted
3889 ip6_neighbor_add_del_interface_address (ip6_main_t * im,
3892 ip6_address_t * address,
3894 u32 if_address_index, u32 is_delete)
3896 vnet_main_t *vnm = vnet_get_main ();
3897 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3899 vlib_main_t *vm = vnm->vlib_main;
3900 ip6_radv_t *radv_info;
3903 /* create solicited node multicast address for this interface adddress */
3904 ip6_set_solicited_node_multicast_address (&a, 0);
3906 a.as_u8[0xd] = address->as_u8[0xd];
3907 a.as_u8[0xe] = address->as_u8[0xe];
3908 a.as_u8[0xf] = address->as_u8[0xf];
3912 /* try to create radv_info - does nothing if ipv6 already enabled */
3913 enable_ip6_interface (vm, sw_if_index);
3915 /* look up the radv_t information for this interface */
3916 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3918 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3922 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3925 if (!ip6_address_is_link_local_unicast (address))
3926 radv_info->ref_count++;
3928 ip6_neighbor_add_mld_prefix (radv_info, &a);
3935 /* look up the radv_t information for this interface */
3936 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3938 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3943 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3945 ip6_neighbor_del_mld_prefix (radv_info, &a);
3947 /* if interface up send MLDP "report" */
3948 radv_info->all_routers_mcast = 0;
3951 if (!ip6_address_is_link_local_unicast (address))
3952 radv_info->ref_count--;
3954 /* Ensure that IPv6 is disabled, and LL removed after ref_count reaches 0 */
3955 disable_ip6_interface (vm, sw_if_index);
3960 ip6_set_neighbor_limit (u32 neighbor_limit)
3962 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3964 nm->limit_neighbor_cache_size = neighbor_limit;
3969 ip6_neighbor_table_bind (ip6_main_t * im,
3972 u32 new_fib_index, u32 old_fib_index)
3974 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3975 ip6_neighbor_t *n = NULL;
3976 u32 i, *to_re_add = 0;
3979 pool_foreach (n, nm->neighbor_pool,
3981 if (n->key.sw_if_index == sw_if_index)
3982 vec_add1 (to_re_add, n - nm->neighbor_pool);
3986 for (i = 0; i < vec_len (to_re_add); i++)
3988 n = pool_elt_at_index (nm->neighbor_pool, to_re_add[i]);
3989 ip6_neighbor_adj_fib_remove (n, old_fib_index);
3990 ip6_neighbor_adj_fib_add (n, new_fib_index);
3992 vec_free (to_re_add);
3995 static clib_error_t *
3996 ip6_neighbor_init (vlib_main_t * vm)
3998 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3999 ip6_main_t *im = &ip6_main;
4001 mhash_init (&nm->neighbor_index_by_key,
4002 /* value size */ sizeof (uword),
4003 /* key size */ sizeof (ip6_neighbor_key_t));
4005 icmp6_register_type (vm, ICMP6_neighbor_solicitation,
4006 ip6_icmp_neighbor_solicitation_node.index);
4007 icmp6_register_type (vm, ICMP6_neighbor_advertisement,
4008 ip6_icmp_neighbor_advertisement_node.index);
4009 icmp6_register_type (vm, ICMP6_router_solicitation,
4010 ip6_icmp_router_solicitation_node.index);
4011 icmp6_register_type (vm, ICMP6_router_advertisement,
4012 ip6_icmp_router_advertisement_node.index);
4014 /* handler node for ip6 neighbor discovery events and timers */
4015 vlib_register_node (vm, &ip6_icmp_neighbor_discovery_event_node);
4017 /* add call backs */
4018 ip6_add_del_interface_address_callback_t cb;
4019 memset (&cb, 0x0, sizeof (ip6_add_del_interface_address_callback_t));
4021 /* when an interface address changes... */
4022 cb.function = ip6_neighbor_add_del_interface_address;
4023 cb.function_opaque = 0;
4024 vec_add1 (im->add_del_interface_address_callbacks, cb);
4026 ip6_table_bind_callback_t cbt;
4027 cbt.function = ip6_neighbor_table_bind;
4028 cbt.function_opaque = 0;
4029 vec_add1 (im->table_bind_callbacks, cbt);
4031 mhash_init (&nm->pending_resolutions_by_address,
4032 /* value size */ sizeof (uword),
4033 /* key size */ sizeof (ip6_address_t));
4035 mhash_init (&nm->mac_changes_by_address,
4036 /* value size */ sizeof (uword),
4037 /* key size */ sizeof (ip6_address_t));
4039 /* default, configurable */
4040 nm->limit_neighbor_cache_size = 50000;
4042 nm->wc_ip6_nd_publisher_node = (uword) ~ 0;
4045 /* $$$$ Hack fix for today */
4046 vec_validate_init_empty
4047 (im->discover_neighbor_next_index_by_hw_if_index, 32, 0 /* drop */ );
4053 VLIB_INIT_FUNCTION (ip6_neighbor_init);
4057 vnet_register_ip6_neighbor_resolution_event (vnet_main_t * vnm,
4060 uword type_opaque, uword data)
4062 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4063 ip6_address_t *address = address_arg;
4065 pending_resolution_t *pr;
4067 pool_get (nm->pending_resolutions, pr);
4069 pr->next_index = ~0;
4070 pr->node_index = node_index;
4071 pr->type_opaque = type_opaque;
4074 p = mhash_get (&nm->pending_resolutions_by_address, address);
4077 /* Insert new resolution at the head of the list */
4078 pr->next_index = p[0];
4079 mhash_unset (&nm->pending_resolutions_by_address, address, 0);
4082 mhash_set (&nm->pending_resolutions_by_address, address,
4083 pr - nm->pending_resolutions, 0 /* old value */ );
4087 vnet_add_del_ip6_nd_change_event (vnet_main_t * vnm,
4088 void *data_callback,
4092 uword type_opaque, uword data, int is_add)
4094 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4095 ip6_address_t *address = address_arg;
4097 /* Try to find an existing entry */
4098 u32 *first = (u32 *) mhash_get (&nm->mac_changes_by_address, address);
4100 pending_resolution_t *mc;
4101 while (p && *p != ~0)
4103 mc = pool_elt_at_index (nm->mac_changes, *p);
4104 if (mc->node_index == node_index && mc->type_opaque == type_opaque
4107 p = &mc->next_index;
4110 int found = p && *p != ~0;
4114 return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
4116 pool_get (nm->mac_changes, mc);
4117 *mc = (pending_resolution_t)
4119 .next_index = ~0,.node_index = node_index,.type_opaque =
4120 type_opaque,.data = data,.data_callback = data_callback,.pid =
4123 /* Insert new resolution at the end of the list */
4124 u32 new_idx = mc - nm->mac_changes;
4128 mhash_set (&nm->mac_changes_by_address, address, new_idx, 0);
4133 return VNET_API_ERROR_NO_SUCH_ENTRY;
4135 /* Clients may need to clean up pool entries, too */
4136 void (*fp) (u32, u8 *) = data_callback;
4138 (*fp) (mc->data, 0 /* no new mac addrs */ );
4140 /* Remove the entry from the list and delete the entry */
4141 *p = mc->next_index;
4142 pool_put (nm->mac_changes, mc);
4144 /* Remove from hash if we deleted the last entry */
4145 if (*p == ~0 && p == first)
4146 mhash_unset (&nm->mac_changes_by_address, address, 0);
4152 vnet_ip6_nd_term (vlib_main_t * vm,
4153 vlib_node_runtime_t * node,
4155 ethernet_header_t * eth,
4156 ip6_header_t * ip, u32 sw_if_index, u16 bd_index)
4158 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4159 icmp6_neighbor_solicitation_or_advertisement_header_t *ndh;
4161 ndh = ip6_next_header (ip);
4162 if (ndh->icmp.type != ICMP6_neighbor_solicitation &&
4163 ndh->icmp.type != ICMP6_neighbor_advertisement)
4166 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
4167 (p0->flags & VLIB_BUFFER_IS_TRACED)))
4169 u8 *t0 = vlib_add_trace (vm, node, p0,
4170 sizeof (icmp6_input_trace_t));
4171 clib_memcpy (t0, ip, sizeof (icmp6_input_trace_t));
4174 /* Check if anyone want ND events for L2 BDs */
4176 (nm->wc_ip6_nd_publisher_node != (uword) ~ 0
4177 && !ip6_address_is_link_local_unicast (&ip->src_address)))
4179 vnet_nd_wc_publish (sw_if_index, eth->src_address, &ip->src_address);
4182 /* Check if MAC entry exsist for solicited target IP */
4183 if (ndh->icmp.type == ICMP6_neighbor_solicitation)
4185 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *opt;
4186 l2_bridge_domain_t *bd_config;
4189 opt = (void *) (ndh + 1);
4190 if ((opt->header.type !=
4191 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address) ||
4192 (opt->header.n_data_u64s != 1))
4193 return 0; /* source link layer address option not present */
4195 bd_config = vec_elt_at_index (l2input_main.bd_configs, bd_index);
4197 (u8 *) hash_get_mem (bd_config->mac_by_ip6, &ndh->target_address);
4199 { /* found ip-mac entry, generate eighbor advertisement response */
4201 vlib_node_runtime_t *error_node =
4202 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
4203 ip->dst_address = ip->src_address;
4204 ip->src_address = ndh->target_address;
4205 ip->hop_limit = 255;
4207 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
4208 clib_memcpy (opt->ethernet_address, macp, 6);
4209 ndh->icmp.type = ICMP6_neighbor_advertisement;
4210 ndh->advertisement_flags = clib_host_to_net_u32
4211 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED |
4212 ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
4213 ndh->icmp.checksum = 0;
4214 ndh->icmp.checksum =
4215 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip, &bogus_length);
4216 clib_memcpy (eth->dst_address, eth->src_address, 6);
4217 clib_memcpy (eth->src_address, macp, 6);
4218 vlib_error_count (vm, error_node->node_index,
4219 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX, 1);
4229 ip6_neighbor_proxy_add_del (u32 sw_if_index, ip6_address_t * addr, u8 is_del)
4233 fib_prefix_t pfx = {
4235 .fp_proto = FIB_PROTOCOL_IP6,
4240 ip46_address_t nh = {
4244 fib_index = ip6_fib_table_get_index_for_sw_if_index (sw_if_index);
4246 if (~0 == fib_index)
4247 return VNET_API_ERROR_NO_SUCH_FIB;
4251 fib_table_entry_path_remove (fib_index,
4253 FIB_SOURCE_IP6_ND_PROXY,
4257 ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
4258 /* flush the ND cache of this address if it's there */
4259 vnet_unset_ip6_ethernet_neighbor (vlib_get_main (),
4260 sw_if_index, addr, NULL, 0);
4264 fib_table_entry_path_add (fib_index,
4266 FIB_SOURCE_IP6_ND_PROXY,
4267 FIB_ENTRY_FLAG_NONE,
4271 ~0, 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
4276 static clib_error_t *
4277 set_ip6_nd_proxy_cmd (vlib_main_t * vm,
4278 unformat_input_t * input, vlib_cli_command_t * cmd)
4280 vnet_main_t *vnm = vnet_get_main ();
4281 clib_error_t *error = 0;
4286 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4288 /* get the rest of the command */
4289 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
4291 if (unformat (input, "%U", unformat_ip6_address, &addr))
4293 else if (unformat (input, "delete") || unformat (input, "del"))
4296 return (unformat_parse_error (input));
4300 ip6_neighbor_proxy_add_del (sw_if_index, &addr, is_del);
4306 VLIB_CLI_COMMAND (set_ip6_nd_proxy_command, static) =
4308 .path = "set ip6 nd proxy",
4309 .short_help = "set ip6 nd proxy <HOST> <INTERFACE>",
4310 .function = set_ip6_nd_proxy_cmd,
4315 ethernet_ndp_change_mac (u32 sw_if_index)
4317 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4322 pool_foreach (n, nm->neighbor_pool,
4324 if (n->key.sw_if_index == sw_if_index)
4326 adj_nbr_walk_nh6 (sw_if_index,
4327 &n->key.ip6_address,
4328 ip6_nd_mk_complete_walk, n);
4333 ai = adj_glean_get (FIB_PROTOCOL_IP6, sw_if_index);
4335 if (ADJ_INDEX_INVALID != ai)
4336 adj_glean_update_rewrite (ai);
4340 send_ip6_na (vlib_main_t * vm, vnet_hw_interface_t * hi)
4342 ip6_main_t *i6m = &ip6_main;
4343 u32 sw_if_index = hi->sw_if_index;
4344 ip6_address_t *ip6_addr = ip6_interface_first_address (i6m, sw_if_index);
4348 ("Sending unsolicitated NA IP6 address %U on sw_if_idex %d",
4349 format_ip6_address, ip6_addr, sw_if_index);
4351 /* Form unsolicited neighbor advertisement packet from NS pkt template */
4354 icmp6_neighbor_solicitation_header_t *h =
4355 vlib_packet_template_get_packet (vm,
4356 &i6m->discover_neighbor_packet_template,
4358 ip6_set_reserved_multicast_address (&h->ip.dst_address,
4359 IP6_MULTICAST_SCOPE_link_local,
4360 IP6_MULTICAST_GROUP_ID_all_hosts);
4361 h->ip.src_address = ip6_addr[0];
4362 h->neighbor.icmp.type = ICMP6_neighbor_advertisement;
4363 h->neighbor.target_address = ip6_addr[0];
4364 h->neighbor.advertisement_flags = clib_host_to_net_u32
4365 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
4366 clib_memcpy (h->link_layer_option.ethernet_address,
4367 hi->hw_address, vec_len (hi->hw_address));
4368 h->neighbor.icmp.checksum =
4369 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
4370 ASSERT (bogus_length == 0);
4372 /* Setup MAC header with IP6 Etype and mcast DMAC */
4373 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
4374 vlib_buffer_advance (b, -sizeof (ethernet_header_t));
4375 ethernet_header_t *e = vlib_buffer_get_current (b);
4376 e->type = clib_host_to_net_u16 (ETHERNET_TYPE_IP6);
4377 clib_memcpy (e->src_address, hi->hw_address, sizeof (e->src_address));
4378 ip6_multicast_ethernet_address (e->dst_address,
4379 IP6_MULTICAST_GROUP_ID_all_hosts);
4381 /* Send unsolicited ND advertisement packet out the specified interface */
4382 vnet_buffer (b)->sw_if_index[VLIB_RX] =
4383 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
4384 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
4385 u32 *to_next = vlib_frame_vector_args (f);
4388 vlib_put_frame_to_node (vm, hi->output_node_index, f);
4393 * fd.io coding-style-patch-verification: ON
4396 * eval: (c-set-style "gnu")