2 * ip/ip6_neighbor.c: IP6 neighbor handling
4 * Copyright (c) 2010 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
18 #include <vnet/ip/ip.h>
19 #include <vnet/ip/ip6_neighbor.h>
20 #include <vnet/ethernet/ethernet.h>
21 #include <vppinfra/mhash.h>
22 #include <vnet/adj/adj.h>
23 #include <vnet/adj/adj_mcast.h>
24 #include <vnet/fib/fib_table.h>
25 #include <vnet/fib/ip6_fib.h>
26 #include <vnet/mfib/ip6_mfib.h>
27 #include <vnet/ip/ip6_ll_table.h>
28 #include <vnet/l2/l2_input.h>
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;
159 /* router solicitations sending state */
160 u8 keep_sending_rs; /* when true then next fields are valid */
161 icmp6_send_router_solicitation_params_t params;
166 vlib_buffer_t *buffer;
175 /* Used for nd event notification only */
178 } pending_resolution_t;
183 /* Hash tables mapping name to opcode. */
184 uword *opcode_by_name;
186 /* lite beer "glean" adjacency handling */
187 mhash_t pending_resolutions_by_address;
188 pending_resolution_t *pending_resolutions;
190 /* Mac address change notification */
191 mhash_t mac_changes_by_address;
192 pending_resolution_t *mac_changes;
194 u32 *neighbor_input_next_index_by_hw_if_index;
196 ip6_neighbor_t *neighbor_pool;
198 mhash_t neighbor_index_by_key;
200 u32 *if_radv_pool_index_by_sw_if_index;
202 ip6_radv_t *if_radv_pool;
204 /* Neighbor attack mitigation */
205 u32 limit_neighbor_cache_size;
206 u32 neighbor_delete_rotor;
208 /* Wildcard nd report publisher */
209 uword wc_ip6_nd_publisher_node;
210 uword wc_ip6_nd_publisher_et;
212 /* Router advertisement report publisher */
213 uword ip6_ra_publisher_node;
214 uword ip6_ra_publisher_et;
215 } ip6_neighbor_main_t;
217 /* ipv6 neighbor discovery - timer/event types */
221 } ip6_icmp_neighbor_discovery_event_type_t;
231 } ip6_icmp_neighbor_discovery_event_data_t;
233 static ip6_neighbor_main_t ip6_neighbor_main;
234 ip6_neighbor_public_main_t ip6_neighbor_public_main;
235 static ip6_address_t ip6a_zero; /* ip6 address 0 */
237 static void wc_nd_signal_report (wc_nd_report_t * r);
238 static void ra_signal_report (ra_report_t * r);
241 ip6_neighbor_get_link_local_address (u32 sw_if_index)
243 static ip6_address_t empty_address = { {0} };
244 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
245 ip6_radv_t *radv_info;
248 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
251 clib_warning ("IPv6 is not enabled for sw_if_index %d", sw_if_index);
252 return empty_address;
254 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
255 if (radv_info == NULL)
257 clib_warning ("Internal error");
258 return empty_address;
260 return radv_info->link_local_address;
264 * @brief publish wildcard arp event
265 * @param sw_if_index The interface on which the ARP entires are acted
268 vnet_nd_wc_publish (u32 sw_if_index, u8 * mac, ip6_address_t * ip6)
271 .sw_if_index = sw_if_index,
274 memcpy (r.mac, mac, sizeof r.mac);
276 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
277 vl_api_rpc_call_main_thread (wc_nd_signal_report, (u8 *) & r, sizeof r);
282 wc_nd_signal_report (wc_nd_report_t * r)
284 vlib_main_t *vm = vlib_get_main ();
285 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
286 uword ni = nm->wc_ip6_nd_publisher_node;
287 uword et = nm->wc_ip6_nd_publisher_et;
289 if (ni == (uword) ~ 0)
292 vlib_process_signal_event_data (vm, ni, et, 1, sizeof *q);
298 wc_nd_set_publisher_node (uword node_index, uword event_type)
300 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
301 nm->wc_ip6_nd_publisher_node = node_index;
302 nm->wc_ip6_nd_publisher_et = event_type;
306 ra_publish (ra_report_t * r)
308 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
309 vl_api_rpc_call_main_thread (ra_signal_report, (u8 *) r, sizeof *r);
314 ra_signal_report (ra_report_t * r)
316 vlib_main_t *vm = vlib_get_main ();
317 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
318 uword ni = nm->ip6_ra_publisher_node;
319 uword et = nm->ip6_ra_publisher_et;
321 if (ni == (uword) ~ 0)
323 ra_report_t *q = vlib_process_signal_event_data (vm, ni, et, 1, sizeof *q);
329 ra_set_publisher_node (uword node_index, uword event_type)
331 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
332 nm->ip6_ra_publisher_node = node_index;
333 nm->ip6_ra_publisher_et = event_type;
337 format_ip6_neighbor_ip6_entry (u8 * s, va_list * va)
339 vlib_main_t *vm = va_arg (*va, vlib_main_t *);
340 ip6_neighbor_t *n = va_arg (*va, ip6_neighbor_t *);
341 vnet_main_t *vnm = vnet_get_main ();
342 vnet_sw_interface_t *si;
346 return format (s, "%=12s%=45s%=6s%=20s%=40s", "Time", "Address", "Flags",
347 "Link layer", "Interface");
349 if (n->flags & IP6_NEIGHBOR_FLAG_DYNAMIC)
350 flags = format (flags, "D");
352 if (n->flags & IP6_NEIGHBOR_FLAG_STATIC)
353 flags = format (flags, "S");
355 if (n->flags & IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY)
356 flags = format (flags, "N");
358 si = vnet_get_sw_interface (vnm, n->key.sw_if_index);
359 s = format (s, "%=12U%=45U%=6s%=20U%=40U",
360 format_vlib_time, vm, n->time_last_updated,
361 format_ip6_address, &n->key.ip6_address,
362 flags ? (char *) flags : "",
363 format_ethernet_address, n->link_layer_address,
364 format_vnet_sw_interface_name, vnm, si);
371 ip6_neighbor_adj_fib_remove (ip6_neighbor_t * n, u32 fib_index)
373 if (FIB_NODE_INDEX_INVALID != n->fib_entry_index)
375 if (ip6_address_is_link_local_unicast (&n->key.ip6_address))
377 ip6_ll_prefix_t pfx = {
378 .ilp_addr = n->key.ip6_address,
379 .ilp_sw_if_index = n->key.sw_if_index,
381 ip6_ll_table_entry_delete (&pfx);
387 .fp_proto = FIB_PROTOCOL_IP6,
388 .fp_addr.ip6 = n->key.ip6_address,
390 fib_table_entry_path_remove (fib_index,
395 n->key.sw_if_index, ~0,
396 1, FIB_ROUTE_PATH_FLAG_NONE);
406 u8 link_layer_address[6];
409 } ip6_neighbor_set_unset_rpc_args_t;
411 static void ip6_neighbor_set_unset_rpc_callback
412 (ip6_neighbor_set_unset_rpc_args_t * a);
414 static void set_unset_ip6_neighbor_rpc
417 ip6_address_t * a, u8 * link_layer_address, int is_add, int is_static,
420 ip6_neighbor_set_unset_rpc_args_t args;
421 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
423 args.sw_if_index = sw_if_index;
424 args.is_add = is_add;
425 args.is_static = is_static;
426 args.is_no_fib_entry = is_no_fib_entry;
427 clib_memcpy (&args.addr, a, sizeof (*a));
428 if (NULL != link_layer_address)
429 clib_memcpy (args.link_layer_address, link_layer_address, 6);
431 vl_api_rpc_call_main_thread (ip6_neighbor_set_unset_rpc_callback,
432 (u8 *) & args, sizeof (args));
436 ip6_nbr_probe (ip_adjacency_t * adj)
438 icmp6_neighbor_solicitation_header_t *h;
439 vnet_main_t *vnm = vnet_get_main ();
440 ip6_main_t *im = &ip6_main;
441 ip_interface_address_t *ia;
442 ip6_address_t *dst, *src;
443 vnet_hw_interface_t *hi;
444 vnet_sw_interface_t *si;
450 vm = vlib_get_main ();
452 si = vnet_get_sw_interface (vnm, adj->rewrite_header.sw_if_index);
453 dst = &adj->sub_type.nbr.next_hop.ip6;
455 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
459 src = ip6_interface_address_matching_destination (im, dst,
467 h = vlib_packet_template_get_packet (vm,
468 &im->discover_neighbor_packet_template,
473 hi = vnet_get_sup_hw_interface (vnm, adj->rewrite_header.sw_if_index);
475 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
476 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
477 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
478 h->ip.src_address = src[0];
479 h->neighbor.target_address = dst[0];
481 clib_memcpy (h->link_layer_option.ethernet_address,
482 hi->hw_address, vec_len (hi->hw_address));
484 h->neighbor.icmp.checksum =
485 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
486 ASSERT (bogus_length == 0);
488 b = vlib_get_buffer (vm, bi);
489 vnet_buffer (b)->sw_if_index[VLIB_RX] =
490 vnet_buffer (b)->sw_if_index[VLIB_TX] = adj->rewrite_header.sw_if_index;
492 /* Add encapsulation string for software interface (e.g. ethernet header). */
493 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
494 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
497 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
498 u32 *to_next = vlib_frame_vector_args (f);
501 vlib_put_frame_to_node (vm, hi->output_node_index, f);
506 ip6_nd_mk_complete (adj_index_t ai, ip6_neighbor_t * nbr)
508 adj_nbr_update_rewrite (ai, ADJ_NBR_REWRITE_FLAG_COMPLETE,
509 ethernet_build_rewrite (vnet_get_main (),
510 nbr->key.sw_if_index,
511 adj_get_link_type (ai),
512 nbr->link_layer_address));
516 ip6_nd_mk_incomplete (adj_index_t ai)
518 ip_adjacency_t *adj = adj_get (ai);
520 adj_nbr_update_rewrite (ai,
521 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
522 ethernet_build_rewrite (vnet_get_main (),
525 adj_get_link_type (ai),
526 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
529 #define IP6_NBR_MK_KEY(k, sw_if_index, addr) \
531 k.sw_if_index = sw_if_index; \
532 k.ip6_address = *addr; \
536 static ip6_neighbor_t *
537 ip6_nd_find (u32 sw_if_index, const ip6_address_t * addr)
539 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
540 ip6_neighbor_t *n = NULL;
541 ip6_neighbor_key_t k;
544 IP6_NBR_MK_KEY (k, sw_if_index, addr);
546 p = mhash_get (&nm->neighbor_index_by_key, &k);
549 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
556 ip6_nd_mk_complete_walk (adj_index_t ai, void *ctx)
558 ip6_neighbor_t *nbr = ctx;
560 ip6_nd_mk_complete (ai, nbr);
562 return (ADJ_WALK_RC_CONTINUE);
566 ip6_nd_mk_incomplete_walk (adj_index_t ai, void *ctx)
568 ip6_nd_mk_incomplete (ai);
570 return (ADJ_WALK_RC_CONTINUE);
573 static clib_error_t *
574 ip6_neighbor_sw_interface_up_down (vnet_main_t * vnm,
575 u32 sw_if_index, u32 flags)
577 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
579 u32 i, *to_delete = 0;
582 pool_foreach (n, nm->neighbor_pool,
584 if (n->key.sw_if_index == sw_if_index)
585 vec_add1 (to_delete, n - nm->neighbor_pool);
589 if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
591 for (i = 0; i < vec_len (to_delete); i++)
593 n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
594 adj_nbr_walk_nh6 (n->key.sw_if_index, &n->key.ip6_address,
595 ip6_nd_mk_complete_walk, n);
600 for (i = 0; i < vec_len (to_delete); i++)
602 n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
603 adj_nbr_walk_nh6 (n->key.sw_if_index, &n->key.ip6_address,
604 ip6_nd_mk_incomplete_walk, NULL);
605 if (n->flags & IP6_NEIGHBOR_FLAG_STATIC)
607 ip6_neighbor_adj_fib_remove (n,
608 ip6_fib_table_get_index_for_sw_if_index
609 (n->key.sw_if_index));
610 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
611 pool_put (nm->neighbor_pool, n);
615 vec_free (to_delete);
619 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_neighbor_sw_interface_up_down);
622 ip6_ethernet_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
629 nbr = ip6_nd_find (sw_if_index, &adj->sub_type.nbr.next_hop.ip6);
631 switch (adj->lookup_next_index)
633 case IP_LOOKUP_NEXT_GLEAN:
634 adj_glean_update_rewrite (ai);
636 case IP_LOOKUP_NEXT_ARP:
639 adj_nbr_walk_nh6 (sw_if_index, &nbr->key.ip6_address,
640 ip6_nd_mk_complete_walk, nbr);
645 * no matching ND entry.
646 * construct the rewrite required to for an ND packet, and stick
647 * that in the adj's pipe to smoke.
649 adj_nbr_update_rewrite (ai,
650 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
651 ethernet_build_rewrite (vnm,
654 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
657 * since the FIB has added this adj for a route, it makes sense it may
658 * want to forward traffic sometime soon. Let's send a speculative ND.
659 * just one. If we were to do periodically that wouldn't be bad either,
660 * but that's more code than i'm prepared to write at this time for
661 * relatively little reward.
666 case IP_LOOKUP_NEXT_BCAST:
667 adj_nbr_update_rewrite (ai,
668 ADJ_NBR_REWRITE_FLAG_COMPLETE,
669 ethernet_build_rewrite (vnm,
672 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
674 case IP_LOOKUP_NEXT_MCAST:
677 * Construct a partial rewrite from the known ethernet mcast dest MAC
682 rewrite = ethernet_build_rewrite (vnm,
685 ethernet_ip6_mcast_dst_addr ());
688 * Complete the remaining fields of the adj's rewrite to direct the
689 * complete of the rewrite at switch time by copying in the IP
690 * dst address's bytes.
691 * Ofset is 2 bytes into the desintation address.
693 offset = vec_len (rewrite) - 2;
694 adj_mcast_update_rewrite (ai, rewrite, offset);
698 case IP_LOOKUP_NEXT_DROP:
699 case IP_LOOKUP_NEXT_PUNT:
700 case IP_LOOKUP_NEXT_LOCAL:
701 case IP_LOOKUP_NEXT_REWRITE:
702 case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
703 case IP_LOOKUP_NEXT_MIDCHAIN:
704 case IP_LOOKUP_NEXT_ICMP_ERROR:
705 case IP_LOOKUP_N_NEXT:
713 ip6_neighbor_adj_fib_add (ip6_neighbor_t * n, u32 fib_index)
715 if (ip6_address_is_link_local_unicast (&n->key.ip6_address))
717 ip6_ll_prefix_t pfx = {
718 .ilp_addr = n->key.ip6_address,
719 .ilp_sw_if_index = n->key.sw_if_index,
722 ip6_ll_table_entry_update (&pfx, FIB_ROUTE_PATH_FLAG_NONE);
728 .fp_proto = FIB_PROTOCOL_IP6,
729 .fp_addr.ip6 = n->key.ip6_address,
733 fib_table_entry_path_add (fib_index, &pfx, FIB_SOURCE_ADJ,
734 FIB_ENTRY_FLAG_ATTACHED,
735 DPO_PROTO_IP6, &pfx.fp_addr,
736 n->key.sw_if_index, ~0, 1, NULL,
737 FIB_ROUTE_PATH_FLAG_NONE);
741 static ip6_neighbor_t *
742 force_reuse_neighbor_entry (void)
745 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
747 u32 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
748 if (index == ~0) /* Try again from elt 0 */
749 index = pool_next_index (nm->neighbor_pool, index);
751 /* Find a non-static random entry to free up for reuse */
754 if ((count++ == 100) || (index == ~0))
755 return NULL; /* give up after 100 entries */
756 n = pool_elt_at_index (nm->neighbor_pool, index);
757 nm->neighbor_delete_rotor = index;
758 index = pool_next_index (nm->neighbor_pool, index);
760 while (n->flags & IP6_NEIGHBOR_FLAG_STATIC);
762 /* Remove ARP entry from its interface and update fib */
763 adj_nbr_walk_nh6 (n->key.sw_if_index,
764 &n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL);
765 ip6_neighbor_adj_fib_remove
766 (n, ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index));
767 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
773 vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
776 u8 * link_layer_address,
777 uword n_bytes_link_layer_address,
778 int is_static, int is_no_fib_entry)
780 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
781 ip6_neighbor_key_t k;
782 ip6_neighbor_t *n = 0;
783 int make_new_nd_cache_entry = 1;
786 pending_resolution_t *pr, *mc;
788 if (vlib_get_thread_index ())
790 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
791 1 /* set new neighbor */ , is_static,
796 k.sw_if_index = sw_if_index;
797 k.ip6_address = a[0];
800 p = mhash_get (&nm->neighbor_index_by_key, &k);
803 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
804 /* Refuse to over-write static neighbor entry. */
805 if (!is_static && (n->flags & IP6_NEIGHBOR_FLAG_STATIC))
807 /* if MAC address match, still check to send event */
808 if (0 == memcmp (n->link_layer_address,
809 link_layer_address, n_bytes_link_layer_address))
810 goto check_customers;
813 make_new_nd_cache_entry = 0;
816 if (make_new_nd_cache_entry)
818 if (nm->limit_neighbor_cache_size &&
819 pool_elts (nm->neighbor_pool) >= nm->limit_neighbor_cache_size)
821 n = force_reuse_neighbor_entry ();
826 pool_get (nm->neighbor_pool, n);
828 mhash_set (&nm->neighbor_index_by_key, &k, n - nm->neighbor_pool,
831 n->fib_entry_index = FIB_NODE_INDEX_INVALID;
833 clib_memcpy (n->link_layer_address,
834 link_layer_address, n_bytes_link_layer_address);
837 * create the adj-fib. the entry in the FIB table for and to the peer.
839 if (!is_no_fib_entry)
841 ip6_neighbor_adj_fib_add
842 (n, ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index));
846 n->flags |= IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY;
852 * prevent a DoS attack from the data-plane that
853 * spams us with no-op updates to the MAC address
855 if (0 == memcmp (n->link_layer_address,
856 link_layer_address, n_bytes_link_layer_address))
858 n->time_last_updated = vlib_time_now (vm);
859 goto check_customers;
862 clib_memcpy (n->link_layer_address,
863 link_layer_address, n_bytes_link_layer_address);
866 /* Update time stamp and flags. */
867 n->time_last_updated = vlib_time_now (vm);
870 n->flags |= IP6_NEIGHBOR_FLAG_STATIC;
871 n->flags &= ~IP6_NEIGHBOR_FLAG_DYNAMIC;
875 n->flags |= IP6_NEIGHBOR_FLAG_DYNAMIC;
876 n->flags &= ~IP6_NEIGHBOR_FLAG_STATIC;
879 adj_nbr_walk_nh6 (sw_if_index,
880 &n->key.ip6_address, ip6_nd_mk_complete_walk, n);
883 /* Customer(s) waiting for this address to be resolved? */
884 p = mhash_get (&nm->pending_resolutions_by_address, a);
889 while (next_index != (u32) ~ 0)
891 pr = pool_elt_at_index (nm->pending_resolutions, next_index);
892 vlib_process_signal_event (vm, pr->node_index,
893 pr->type_opaque, pr->data);
894 next_index = pr->next_index;
895 pool_put (nm->pending_resolutions, pr);
898 mhash_unset (&nm->pending_resolutions_by_address, a, 0);
901 /* Customer(s) requesting ND event for this address? */
902 p = mhash_get (&nm->mac_changes_by_address, a);
907 while (next_index != (u32) ~ 0)
909 int (*fp) (u32, u8 *, u32, ip6_address_t *);
911 mc = pool_elt_at_index (nm->mac_changes, next_index);
912 fp = mc->data_callback;
914 /* Call the user's data callback, return 1 to suppress dup events */
917 (*fp) (mc->data, link_layer_address, sw_if_index, &ip6a_zero);
919 * Signal the resolver process, as long as the user
920 * says they want to be notified
923 vlib_process_signal_event (vm, mc->node_index,
924 mc->type_opaque, mc->data);
925 next_index = mc->next_index;
933 vnet_unset_ip6_ethernet_neighbor (vlib_main_t * vm,
936 u8 * link_layer_address,
937 uword n_bytes_link_layer_address)
939 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
940 ip6_neighbor_key_t k;
945 if (vlib_get_thread_index ())
947 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
948 0 /* unset */ , 0, 0);
952 k.sw_if_index = sw_if_index;
953 k.ip6_address = a[0];
956 p = mhash_get (&nm->neighbor_index_by_key, &k);
963 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
965 adj_nbr_walk_nh6 (sw_if_index,
966 &n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL);
967 ip6_neighbor_adj_fib_remove
968 (n, ip6_fib_table_get_index_for_sw_if_index (sw_if_index));
970 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
971 pool_put (nm->neighbor_pool, n);
977 static void ip6_neighbor_set_unset_rpc_callback
978 (ip6_neighbor_set_unset_rpc_args_t * a)
980 vlib_main_t *vm = vlib_get_main ();
982 vnet_set_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
983 a->link_layer_address, 6, a->is_static,
986 vnet_unset_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
987 a->link_layer_address, 6);
991 ip6_neighbor_sort (void *a1, void *a2)
993 vnet_main_t *vnm = vnet_get_main ();
994 ip6_neighbor_t *n1 = a1, *n2 = a2;
996 cmp = vnet_sw_interface_compare (vnm, n1->key.sw_if_index,
997 n2->key.sw_if_index);
999 cmp = ip6_address_compare (&n1->key.ip6_address, &n2->key.ip6_address);
1004 ip6_neighbors_pool (void)
1006 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1007 return nm->neighbor_pool;
1011 ip6_neighbors_entries (u32 sw_if_index)
1013 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1014 ip6_neighbor_t *n, *ns = 0;
1017 pool_foreach (n, nm->neighbor_pool,
1019 if (sw_if_index != ~0 && n->key.sw_if_index != sw_if_index)
1021 vec_add1 (ns, n[0]);
1026 vec_sort_with_function (ns, ip6_neighbor_sort);
1030 static clib_error_t *
1031 show_ip6_neighbors (vlib_main_t * vm,
1032 unformat_input_t * input, vlib_cli_command_t * cmd)
1034 vnet_main_t *vnm = vnet_get_main ();
1035 ip6_neighbor_t *n, *ns;
1036 clib_error_t *error = 0;
1039 /* Filter entries by interface if given. */
1041 (void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index);
1043 ns = ip6_neighbors_entries (sw_if_index);
1046 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, 0);
1049 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, n);
1058 * This command is used to display the adjacent IPv6 hosts found via
1059 * neighbor discovery. Optionally, limit the output to the specified
1063 * Example of how to display the IPv6 neighbor adjacency table:
1064 * @cliexstart{show ip6 neighbors}
1065 * Time Address Flags Link layer Interface
1066 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
1067 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
1068 * 886.6654 ::1:1:c:0:9 S 02:fe:e4:45:27:5b GigabitEthernet3/0/0
1070 * Example of how to display the IPv6 neighbor adjacency table for given interface:
1071 * @cliexstart{show ip6 neighbors GigabitEthernet2/0/0}
1072 * Time Address Flags Link layer Interface
1073 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
1074 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
1078 VLIB_CLI_COMMAND (show_ip6_neighbors_command, static) = {
1079 .path = "show ip6 neighbors",
1080 .function = show_ip6_neighbors,
1081 .short_help = "show ip6 neighbors [<interface>]",
1085 static clib_error_t *
1086 set_ip6_neighbor (vlib_main_t * vm,
1087 unformat_input_t * input, vlib_cli_command_t * cmd)
1089 vnet_main_t *vnm = vnet_get_main ();
1095 int is_no_fib_entry = 0;
1098 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1100 /* intfc, ip6-address, mac-address */
1101 if (unformat (input, "%U %U %U",
1102 unformat_vnet_sw_interface, vnm, &sw_if_index,
1103 unformat_ip6_address, &addr,
1104 unformat_ethernet_address, mac_address))
1107 else if (unformat (input, "delete") || unformat (input, "del"))
1109 else if (unformat (input, "static"))
1111 else if (unformat (input, "no-fib-entry"))
1112 is_no_fib_entry = 1;
1118 return clib_error_return (0, "Missing interface, ip6 or hw address");
1121 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
1122 mac_address, sizeof (mac_address),
1123 is_static, is_no_fib_entry);
1125 vnet_unset_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
1126 mac_address, sizeof (mac_address));
1131 * This command is used to manually add an entry to the IPv6 neighbor
1132 * adjacency table. Optionally, the entry can be added as static. It is
1133 * also used to remove an entry from the table. Use the '<em>show ip6
1134 * neighbors</em>' command to display all learned and manually entered entries.
1137 * Example of how to add a static entry to the IPv6 neighbor adjacency table:
1138 * @cliexcmd{set ip6 neighbor GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b static}
1139 * Example of how to delete an entry from the IPv6 neighbor adjacency table:
1140 * @cliexcmd{set ip6 neighbor del GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b}
1143 VLIB_CLI_COMMAND (set_ip6_neighbor_command, static) =
1145 .path = "set ip6 neighbor",
1146 .function = set_ip6_neighbor,
1147 .short_help = "set ip6 neighbor [del] <interface> <ip6-address> <mac-address> [static]",
1153 ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP,
1154 ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY,
1155 ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
1156 } icmp6_neighbor_solicitation_or_advertisement_next_t;
1158 static_always_inline uword
1159 icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
1160 vlib_node_runtime_t * node,
1161 vlib_frame_t * frame,
1162 uword is_solicitation)
1164 vnet_main_t *vnm = vnet_get_main ();
1165 ip6_main_t *im = &ip6_main;
1166 uword n_packets = frame->n_vectors;
1167 u32 *from, *to_next;
1168 u32 n_left_from, n_left_to_next, next_index, n_advertisements_sent;
1169 icmp6_neighbor_discovery_option_type_t option_type;
1170 vlib_node_runtime_t *error_node =
1171 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1174 from = vlib_frame_vector_args (frame);
1175 n_left_from = n_packets;
1176 next_index = node->cached_next_index;
1178 if (node->flags & VLIB_NODE_FLAG_TRACE)
1179 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1181 sizeof (icmp6_input_trace_t));
1185 ? ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address
1186 : ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address);
1187 n_advertisements_sent = 0;
1189 while (n_left_from > 0)
1191 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1193 while (n_left_from > 0 && n_left_to_next > 0)
1197 icmp6_neighbor_solicitation_or_advertisement_header_t *h0;
1198 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1199 u32 bi0, options_len0, sw_if_index0, next0, error0;
1200 u32 ip6_sadd_link_local, ip6_sadd_unspecified;
1204 bi0 = to_next[0] = from[0];
1209 n_left_to_next -= 1;
1211 p0 = vlib_get_buffer (vm, bi0);
1212 ip0 = vlib_buffer_get_current (p0);
1213 h0 = ip6_next_header (ip0);
1215 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1217 error0 = ICMP6_ERROR_NONE;
1218 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1219 ip6_sadd_link_local =
1220 ip6_address_is_link_local_unicast (&ip0->src_address);
1221 ip6_sadd_unspecified =
1222 ip6_address_is_unspecified (&ip0->src_address);
1224 /* Check that source address is unspecified, link-local or else on-link. */
1225 if (!ip6_sadd_unspecified && !ip6_sadd_link_local)
1227 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1229 if (ADJ_INDEX_INVALID != src_adj_index0)
1231 ip_adjacency_t *adj0 = adj_get (src_adj_index0);
1233 /* Allow all realistic-looking rewrite adjacencies to pass */
1234 ni0 = adj0->lookup_next_index;
1235 is_rewrite0 = (ni0 >= IP_LOOKUP_NEXT_ARP) &&
1236 (ni0 < IP6_LOOKUP_N_NEXT);
1238 error0 = ((adj0->rewrite_header.sw_if_index != sw_if_index0
1241 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK
1247 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK;
1251 o0 = (void *) (h0 + 1);
1252 o0 = ((options_len0 == 8 && o0->header.type == option_type
1253 && o0->header.n_data_u64s == 1) ? o0 : 0);
1255 /* If src address unspecified or link local, donot learn neighbor MAC */
1256 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1257 !ip6_sadd_unspecified))
1259 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1262 &h0->target_address,
1263 o0->ethernet_address,
1264 sizeof (o0->ethernet_address),
1268 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1270 /* Check that target address is local to this router. */
1271 fib_node_index_t fei;
1275 ip6_fib_table_get_index_for_sw_if_index (sw_if_index0);
1277 if (~0 == fib_index)
1279 error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1283 if (ip6_address_is_link_local_unicast (&h0->target_address))
1285 fei = ip6_fib_table_lookup_exact_match
1286 (ip6_ll_fib_get (sw_if_index0),
1287 &h0->target_address, 128);
1291 fei = ip6_fib_table_lookup_exact_match (fib_index,
1292 &h0->target_address,
1296 if (FIB_NODE_INDEX_INVALID == fei)
1298 /* The target address is not in the FIB */
1300 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1304 if (FIB_ENTRY_FLAG_LOCAL &
1305 fib_entry_get_flags_for_source (fei,
1306 FIB_SOURCE_INTERFACE))
1308 /* It's an address that belongs to one of our interfaces
1312 if (fib_entry_is_sourced
1313 (fei, FIB_SOURCE_IP6_ND_PROXY) ||
1314 fib_entry_is_sourced (fei, FIB_SOURCE_IP6_ND))
1316 /* The address was added by IPv6 Proxy ND config.
1317 * We should only respond to these if the NS arrived on
1318 * the link that has a matching covering prefix */
1323 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1329 if (is_solicitation)
1330 next0 = (error0 != ICMP6_ERROR_NONE
1331 ? ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP
1332 : ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY);
1336 error0 = error0 == ICMP6_ERROR_NONE ?
1337 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_RX : error0;
1340 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1342 vnet_sw_interface_t *sw_if0;
1343 ethernet_interface_t *eth_if0;
1344 ethernet_header_t *eth0;
1346 /* dst address is either source address or the all-nodes mcast addr */
1347 if (!ip6_sadd_unspecified)
1348 ip0->dst_address = ip0->src_address;
1350 ip6_set_reserved_multicast_address (&ip0->dst_address,
1351 IP6_MULTICAST_SCOPE_link_local,
1352 IP6_MULTICAST_GROUP_ID_all_hosts);
1354 ip0->src_address = h0->target_address;
1355 ip0->hop_limit = 255;
1356 h0->icmp.type = ICMP6_neighbor_advertisement;
1358 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1359 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1361 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1364 clib_memcpy (o0->ethernet_address, eth_if0->address, 6);
1366 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
1369 h0->advertisement_flags = clib_host_to_net_u32
1370 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED
1371 | ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
1373 h0->icmp.checksum = 0;
1375 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1377 ASSERT (bogus_length == 0);
1379 /* Reuse current MAC header, copy SMAC to DMAC and
1380 * interface MAC to SMAC */
1381 vlib_buffer_advance (p0, -ethernet_buffer_header_size (p0));
1382 eth0 = vlib_buffer_get_current (p0);
1383 clib_memcpy (eth0->dst_address, eth0->src_address, 6);
1385 clib_memcpy (eth0->src_address, eth_if0->address, 6);
1387 /* Setup input and output sw_if_index for packet */
1388 ASSERT (vnet_buffer (p0)->sw_if_index[VLIB_RX] == sw_if_index0);
1389 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1390 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1391 vnet_main.local_interface_sw_if_index;
1393 n_advertisements_sent++;
1396 p0->error = error_node->errors[error0];
1398 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1399 to_next, n_left_to_next,
1403 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1406 /* Account for advertisements sent. */
1407 vlib_error_count (vm, error_node->node_index,
1408 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX,
1409 n_advertisements_sent);
1411 return frame->n_vectors;
1414 /* for "syslogging" - use elog for now */
1415 #define foreach_log_level \
1416 _ (DEBUG, "DEBUG") \
1417 _ (INFO, "INFORMATION") \
1418 _ (NOTICE, "NOTICE") \
1419 _ (WARNING, "WARNING") \
1421 _ (CRIT, "CRITICAL") \
1422 _ (ALERT, "ALERT") \
1423 _ (EMERG, "EMERGENCY")
1427 #define _(f,s) LOG_##f,
1432 static char *log_level_strings[] = {
1438 static int logmask = 1 << LOG_DEBUG;
1441 ip6_neighbor_syslog (vlib_main_t * vm, int priority, char *fmt, ...)
1443 /* just use elog for now */
1447 if ((priority > LOG_EMERG) || !(logmask & (1 << priority)))
1453 what = va_format (0, fmt, &va);
1455 ELOG_TYPE_DECLARE (e) =
1457 .format = "ip6 nd: (%s): %s",.format_args = "T4T4",};
1462 ed = ELOG_DATA (&vm->elog_main, e);
1463 ed->s[0] = elog_string (&vm->elog_main, log_level_strings[priority]);
1464 ed->s[1] = elog_string (&vm->elog_main, (char *) what);
1471 call_ip6_neighbor_callbacks (void *data,
1472 _vnet_ip6_neighbor_function_list_elt_t * elt)
1474 clib_error_t *error = 0;
1478 error = elt->fp (data);
1481 elt = elt->next_ip6_neighbor_function;
1487 /* ipv6 neighbor discovery - router advertisements */
1490 ICMP6_ROUTER_SOLICITATION_NEXT_DROP,
1491 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW,
1492 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX,
1493 ICMP6_ROUTER_SOLICITATION_N_NEXT,
1494 } icmp6_router_solicitation_or_advertisement_next_t;
1496 static_always_inline uword
1497 icmp6_router_solicitation (vlib_main_t * vm,
1498 vlib_node_runtime_t * node, vlib_frame_t * frame)
1500 vnet_main_t *vnm = vnet_get_main ();
1501 ip6_main_t *im = &ip6_main;
1502 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1503 uword n_packets = frame->n_vectors;
1504 u32 *from, *to_next;
1505 u32 n_left_from, n_left_to_next, next_index;
1506 u32 n_advertisements_sent = 0;
1509 icmp6_neighbor_discovery_option_type_t option_type;
1511 vlib_node_runtime_t *error_node =
1512 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1514 from = vlib_frame_vector_args (frame);
1515 n_left_from = n_packets;
1516 next_index = node->cached_next_index;
1518 if (node->flags & VLIB_NODE_FLAG_TRACE)
1519 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1521 sizeof (icmp6_input_trace_t));
1523 /* source may append his LL address */
1524 option_type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1526 while (n_left_from > 0)
1528 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1530 while (n_left_from > 0 && n_left_to_next > 0)
1534 ip6_radv_t *radv_info = 0;
1536 icmp6_neighbor_discovery_header_t *h0;
1537 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1539 u32 bi0, options_len0, sw_if_index0, next0, error0;
1540 u32 is_solicitation = 1, is_dropped = 0;
1541 u32 is_unspecified, is_link_local;
1543 bi0 = to_next[0] = from[0];
1548 n_left_to_next -= 1;
1550 p0 = vlib_get_buffer (vm, bi0);
1551 ip0 = vlib_buffer_get_current (p0);
1552 h0 = ip6_next_header (ip0);
1554 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1555 is_unspecified = ip6_address_is_unspecified (&ip0->src_address);
1557 ip6_address_is_link_local_unicast (&ip0->src_address);
1559 error0 = ICMP6_ERROR_NONE;
1560 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1562 /* check if solicitation (not from nd_timer node) */
1563 if (ip6_address_is_unspecified (&ip0->dst_address))
1564 is_solicitation = 0;
1566 /* Check that source address is unspecified, link-local or else on-link. */
1567 if (!is_unspecified && !is_link_local)
1569 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1571 if (ADJ_INDEX_INVALID != src_adj_index0)
1573 ip_adjacency_t *adj0 = adj_get (src_adj_index0);
1575 error0 = (adj0->rewrite_header.sw_if_index != sw_if_index0
1577 ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK
1582 error0 = ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK;
1586 /* check for source LL option and process */
1587 o0 = (void *) (h0 + 1);
1588 o0 = ((options_len0 == 8
1589 && o0->header.type == option_type
1590 && o0->header.n_data_u64s == 1) ? o0 : 0);
1592 /* if src address unspecified IGNORE any options */
1593 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1594 !is_unspecified && !is_link_local))
1596 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1598 o0->ethernet_address,
1599 sizeof (o0->ethernet_address),
1603 /* default is to drop */
1604 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1606 if (error0 == ICMP6_ERROR_NONE)
1608 vnet_sw_interface_t *sw_if0;
1609 ethernet_interface_t *eth_if0;
1612 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1613 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1615 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1617 /* only support ethernet interface type for now */
1619 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1622 if (error0 == ICMP6_ERROR_NONE)
1626 /* adjust the sizeof the buffer to just include the ipv6 header */
1627 p0->current_length -=
1629 sizeof (icmp6_neighbor_discovery_header_t));
1631 /* look up the radv_t information for this interface */
1632 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) >
1636 nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1639 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1644 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1647 if (error0 == ICMP6_ERROR_NONE)
1649 f64 now = vlib_time_now (vm);
1651 /* for solicited adverts - need to rate limit */
1652 if (is_solicitation)
1654 if (0 != radv_info->last_radv_time &&
1655 (now - radv_info->last_radv_time) <
1656 MIN_DELAY_BETWEEN_RAS)
1659 radv_info->last_radv_time = now;
1663 icmp6_router_advertisement_header_t rh;
1665 rh.icmp.type = ICMP6_router_advertisement;
1667 rh.icmp.checksum = 0;
1669 rh.current_hop_limit = radv_info->curr_hop_limit;
1670 rh.router_lifetime_in_sec =
1671 clib_host_to_net_u16
1672 (radv_info->adv_router_lifetime_in_sec);
1674 time_in_msec_between_retransmitted_neighbor_solicitations
1676 clib_host_to_net_u32 (radv_info->
1677 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
1678 rh.neighbor_reachable_time_in_msec =
1679 clib_host_to_net_u32 (radv_info->
1680 adv_neighbor_reachable_time_in_msec);
1683 (radv_info->adv_managed_flag) ?
1684 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP :
1687 ((radv_info->adv_other_flag) ?
1688 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP :
1692 u16 payload_length =
1693 sizeof (icmp6_router_advertisement_header_t);
1695 vlib_buffer_add_data (vm,
1696 vlib_buffer_get_free_list_index
1697 (p0), bi0, (void *) &rh,
1699 (icmp6_router_advertisement_header_t));
1701 if (radv_info->adv_link_layer_address)
1703 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
1707 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1708 h.header.n_data_u64s = 1;
1710 /* copy ll address */
1711 clib_memcpy (&h.ethernet_address[0],
1712 eth_if0->address, 6);
1714 vlib_buffer_add_data (vm,
1715 vlib_buffer_get_free_list_index
1716 (p0), bi0, (void *) &h,
1718 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t));
1722 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t);
1725 /* add MTU option */
1726 if (radv_info->adv_link_mtu)
1728 icmp6_neighbor_discovery_mtu_option_t h;
1732 clib_host_to_net_u32 (radv_info->adv_link_mtu);
1733 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu;
1734 h.header.n_data_u64s = 1;
1737 sizeof (icmp6_neighbor_discovery_mtu_option_t);
1739 vlib_buffer_add_data (vm,
1740 vlib_buffer_get_free_list_index
1741 (p0), bi0, (void *) &h,
1743 (icmp6_neighbor_discovery_mtu_option_t));
1746 /* add advertised prefix options */
1747 ip6_radv_prefix_t *pr_info;
1750 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
1752 if(pr_info->enabled &&
1753 (!pr_info->decrement_lifetime_flag
1754 || (pr_info->pref_lifetime_expires >0)))
1756 /* advertise this prefix */
1757 icmp6_neighbor_discovery_prefix_information_option_t h;
1759 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information;
1760 h.header.n_data_u64s = (sizeof(icmp6_neighbor_discovery_prefix_information_option_t) >> 3);
1762 h.dst_address_length = pr_info->prefix_len;
1764 h.flags = (pr_info->adv_on_link_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_FLAG_ON_LINK : 0;
1765 h.flags |= (pr_info->adv_autonomous_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_AUTO : 0;
1767 if(radv_info->cease_radv && pr_info->deprecated_prefix_flag)
1769 h.valid_time = clib_host_to_net_u32(MIN_ADV_VALID_LIFETIME);
1770 h.preferred_time = 0;
1774 if(pr_info->decrement_lifetime_flag)
1776 pr_info->adv_valid_lifetime_in_secs = ((pr_info->valid_lifetime_expires > now)) ?
1777 (pr_info->valid_lifetime_expires - now) : 0;
1779 pr_info->adv_pref_lifetime_in_secs = ((pr_info->pref_lifetime_expires > now)) ?
1780 (pr_info->pref_lifetime_expires - now) : 0;
1783 h.valid_time = clib_host_to_net_u32(pr_info->adv_valid_lifetime_in_secs);
1784 h.preferred_time = clib_host_to_net_u32(pr_info->adv_pref_lifetime_in_secs) ;
1788 clib_memcpy(&h.dst_address, &pr_info->prefix, sizeof(ip6_address_t));
1790 payload_length += sizeof( icmp6_neighbor_discovery_prefix_information_option_t);
1792 vlib_buffer_add_data (vm,
1793 vlib_buffer_get_free_list_index (p0),
1795 (void *)&h, sizeof(icmp6_neighbor_discovery_prefix_information_option_t));
1801 /* add additional options before here */
1803 /* finish building the router advertisement... */
1804 if (!is_unspecified && radv_info->send_unicast)
1806 ip0->dst_address = ip0->src_address;
1810 /* target address is all-nodes mcast addr */
1811 ip6_set_reserved_multicast_address
1813 IP6_MULTICAST_SCOPE_link_local,
1814 IP6_MULTICAST_GROUP_ID_all_hosts);
1817 /* source address MUST be the link-local address */
1818 ip0->src_address = radv_info->link_local_address;
1820 ip0->hop_limit = 255;
1821 ip0->payload_length =
1822 clib_host_to_net_u16 (payload_length);
1824 icmp6_router_advertisement_header_t *rh0 =
1825 (icmp6_router_advertisement_header_t *) (ip0 + 1);
1826 rh0->icmp.checksum =
1827 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1829 ASSERT (bogus_length == 0);
1831 /* setup output if and adjacency */
1832 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1833 vnet_main.local_interface_sw_if_index;
1835 if (is_solicitation)
1837 ethernet_header_t *eth0;
1838 /* Reuse current MAC header, copy SMAC to DMAC and
1839 * interface MAC to SMAC */
1840 vlib_buffer_reset (p0);
1841 eth0 = vlib_buffer_get_current (p0);
1842 clib_memcpy (eth0->dst_address, eth0->src_address,
1844 clib_memcpy (eth0->src_address, eth_if0->address,
1847 is_dropped ? next0 :
1848 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX;
1849 vnet_buffer (p0)->sw_if_index[VLIB_TX] =
1854 adj_index0 = radv_info->mcast_adj_index;
1855 if (adj_index0 == 0)
1856 error0 = ICMP6_ERROR_DST_LOOKUP_MISS;
1860 is_dropped ? next0 :
1861 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW;
1862 vnet_buffer (p0)->ip.adj_index[VLIB_TX] =
1866 p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
1868 radv_info->n_solicitations_dropped += is_dropped;
1869 radv_info->n_solicitations_rcvd += is_solicitation;
1871 if ((error0 == ICMP6_ERROR_NONE) && !is_dropped)
1873 radv_info->n_advertisements_sent++;
1874 n_advertisements_sent++;
1880 p0->error = error_node->errors[error0];
1882 if (error0 != ICMP6_ERROR_NONE)
1883 vlib_error_count (vm, error_node->node_index, error0, 1);
1885 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1886 to_next, n_left_to_next,
1891 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1894 /* Account for router advertisements sent. */
1895 vlib_error_count (vm, error_node->node_index,
1896 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_TX,
1897 n_advertisements_sent);
1899 return frame->n_vectors;
1902 /* validate advertised info for consistancy (see RFC-4861 section 6.2.7) - log any inconsistencies, packet will always be dropped */
1903 static_always_inline uword
1904 icmp6_router_advertisement (vlib_main_t * vm,
1905 vlib_node_runtime_t * node, vlib_frame_t * frame)
1907 vnet_main_t *vnm = vnet_get_main ();
1908 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1909 uword n_packets = frame->n_vectors;
1910 u32 *from, *to_next;
1911 u32 n_left_from, n_left_to_next, next_index;
1912 u32 n_advertisements_rcvd = 0;
1914 vlib_node_runtime_t *error_node =
1915 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1917 from = vlib_frame_vector_args (frame);
1918 n_left_from = n_packets;
1919 next_index = node->cached_next_index;
1921 if (node->flags & VLIB_NODE_FLAG_TRACE)
1922 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1924 sizeof (icmp6_input_trace_t));
1926 while (n_left_from > 0)
1928 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1930 while (n_left_from > 0 && n_left_to_next > 0)
1934 ip6_radv_t *radv_info = 0;
1935 icmp6_router_advertisement_header_t *h0;
1936 u32 bi0, options_len0, sw_if_index0, next0, error0;
1938 bi0 = to_next[0] = from[0];
1943 n_left_to_next -= 1;
1945 p0 = vlib_get_buffer (vm, bi0);
1946 ip0 = vlib_buffer_get_current (p0);
1947 h0 = ip6_next_header (ip0);
1949 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1951 error0 = ICMP6_ERROR_NONE;
1952 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1954 /* Check that source address is link-local */
1955 error0 = (!ip6_address_is_link_local_unicast (&ip0->src_address)) ?
1956 ICMP6_ERROR_ROUTER_ADVERTISEMENT_SOURCE_NOT_LINK_LOCAL : error0;
1958 /* default is to drop */
1959 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1961 n_advertisements_rcvd++;
1963 if (error0 == ICMP6_ERROR_NONE)
1965 vnet_sw_interface_t *sw_if0;
1966 ethernet_interface_t *eth_if0;
1968 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1969 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1971 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1973 /* only support ethernet interface type for now */
1975 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1978 if (error0 == ICMP6_ERROR_NONE)
1982 /* look up the radv_t information for this interface */
1983 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) >
1987 nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1990 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1995 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1998 if (error0 == ICMP6_ERROR_NONE)
2000 radv_info->keep_sending_rs = 0;
2004 r.sw_if_index = sw_if_index0;
2005 memcpy (r.router_address, &ip0->src_address, 16);
2006 r.current_hop_limit = h0->current_hop_limit;
2007 r.flags = h0->flags;
2008 r.router_lifetime_in_sec =
2009 clib_net_to_host_u16 (h0->router_lifetime_in_sec);
2010 r.neighbor_reachable_time_in_msec =
2011 clib_net_to_host_u32
2012 (h0->neighbor_reachable_time_in_msec);
2013 r.time_in_msec_between_retransmitted_neighbor_solicitations = clib_net_to_host_u32 (h0->time_in_msec_between_retransmitted_neighbor_solicitations);
2016 /* validate advertised information */
2017 if ((h0->current_hop_limit && radv_info->curr_hop_limit)
2018 && (h0->current_hop_limit !=
2019 radv_info->curr_hop_limit))
2021 ip6_neighbor_syslog (vm, LOG_WARNING,
2022 "our AdvCurHopLimit on %U doesn't agree with %U",
2023 format_vnet_sw_if_index_name,
2030 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP)
2031 != radv_info->adv_managed_flag)
2033 ip6_neighbor_syslog (vm, LOG_WARNING,
2034 "our AdvManagedFlag on %U doesn't agree with %U",
2035 format_vnet_sw_if_index_name,
2042 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP)
2043 != radv_info->adv_other_flag)
2045 ip6_neighbor_syslog (vm, LOG_WARNING,
2046 "our AdvOtherConfigFlag on %U doesn't agree with %U",
2047 format_vnet_sw_if_index_name,
2054 time_in_msec_between_retransmitted_neighbor_solicitations
2056 adv_time_in_msec_between_retransmitted_neighbor_solicitations)
2058 time_in_msec_between_retransmitted_neighbor_solicitations
2060 clib_host_to_net_u32 (radv_info->
2061 adv_time_in_msec_between_retransmitted_neighbor_solicitations)))
2063 ip6_neighbor_syslog (vm, LOG_WARNING,
2064 "our AdvRetransTimer on %U doesn't agree with %U",
2065 format_vnet_sw_if_index_name,
2071 if ((h0->neighbor_reachable_time_in_msec &&
2072 radv_info->adv_neighbor_reachable_time_in_msec) &&
2073 (h0->neighbor_reachable_time_in_msec !=
2074 clib_host_to_net_u32
2075 (radv_info->adv_neighbor_reachable_time_in_msec)))
2077 ip6_neighbor_syslog (vm, LOG_WARNING,
2078 "our AdvReachableTime on %U doesn't agree with %U",
2079 format_vnet_sw_if_index_name,
2085 /* check for MTU or prefix options or .. */
2086 u8 *opt_hdr = (u8 *) (h0 + 1);
2087 while (options_len0 > 0)
2089 icmp6_neighbor_discovery_option_header_t *o0 =
2090 (icmp6_neighbor_discovery_option_header_t *)
2092 int opt_len = o0->n_data_u64s << 3;
2093 icmp6_neighbor_discovery_option_type_t option_type =
2096 if (options_len0 < 2)
2098 ip6_neighbor_syslog (vm, LOG_ERR,
2099 "malformed RA packet on %U from %U",
2100 format_vnet_sw_if_index_name,
2109 ip6_neighbor_syslog (vm, LOG_ERR,
2110 " zero length option in RA on %U from %U",
2111 format_vnet_sw_if_index_name,
2117 else if (opt_len > options_len0)
2119 ip6_neighbor_syslog (vm, LOG_ERR,
2120 "option length in RA packet greater than total length on %U from %U",
2121 format_vnet_sw_if_index_name,
2128 options_len0 -= opt_len;
2131 switch (option_type)
2133 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address:
2135 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
2137 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
2140 if (opt_len < sizeof (*h))
2143 memcpy (r.slla, h->ethernet_address, 6);
2147 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu:
2149 icmp6_neighbor_discovery_mtu_option_t *h =
2150 (icmp6_neighbor_discovery_mtu_option_t
2153 if (opt_len < sizeof (*h))
2156 r.mtu = clib_net_to_host_u32 (h->mtu);
2158 if ((h->mtu && radv_info->adv_link_mtu) &&
2160 clib_host_to_net_u32
2161 (radv_info->adv_link_mtu)))
2163 ip6_neighbor_syslog (vm, LOG_WARNING,
2164 "our AdvLinkMTU on %U doesn't agree with %U",
2165 format_vnet_sw_if_index_name,
2173 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information:
2175 icmp6_neighbor_discovery_prefix_information_option_t
2177 (icmp6_neighbor_discovery_prefix_information_option_t
2180 /* validate advertised prefix options */
2181 ip6_radv_prefix_t *pr_info;
2182 u32 preferred, valid;
2184 if (opt_len < sizeof (*h))
2187 vec_validate (r.prefixes,
2188 vec_len (r.prefixes));
2189 ra_report_prefix_info_t *prefix =
2190 vec_elt_at_index (r.prefixes,
2191 vec_len (r.prefixes) - 1);
2194 clib_net_to_host_u32 (h->preferred_time);
2195 valid = clib_net_to_host_u32 (h->valid_time);
2197 prefix->preferred_time = preferred;
2198 prefix->valid_time = valid;
2199 prefix->flags = h->flags & 0xc0;
2200 prefix->dst_address_length =
2201 h->dst_address_length;
2202 prefix->dst_address = h->dst_address;
2204 /* look for matching prefix - if we our advertising it, it better be consistant */
2206 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
2210 ip6_address_mask_from_width(&mask, pr_info->prefix_len);
2212 if(pr_info->enabled &&
2213 (pr_info->prefix_len == h->dst_address_length) &&
2214 ip6_address_is_equal_masked (&pr_info->prefix, &h->dst_address, &mask))
2217 if(!pr_info->decrement_lifetime_flag &&
2218 valid != pr_info->adv_valid_lifetime_in_secs)
2220 ip6_neighbor_syslog(vm, LOG_WARNING,
2221 "our ADV validlifetime on %U for %U does not agree with %U",
2222 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
2223 format_ip6_address, &h->dst_address);
2225 if(!pr_info->decrement_lifetime_flag &&
2226 preferred != pr_info->adv_pref_lifetime_in_secs)
2228 ip6_neighbor_syslog(vm, LOG_WARNING,
2229 "our ADV preferredlifetime on %U for %U does not agree with %U",
2230 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
2231 format_ip6_address, &h->dst_address);
2249 p0->error = error_node->errors[error0];
2251 if (error0 != ICMP6_ERROR_NONE)
2252 vlib_error_count (vm, error_node->node_index, error0, 1);
2254 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2255 to_next, n_left_to_next,
2259 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2262 /* Account for router advertisements received. */
2263 vlib_error_count (vm, error_node->node_index,
2264 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_RX,
2265 n_advertisements_rcvd);
2267 return frame->n_vectors;
2271 random_f64_from_to (f64 from, f64 to)
2273 static u32 seed = 0;
2274 static u8 seed_set = 0;
2277 seed = random_default_seed ();
2280 return random_f64 (&seed) * (to - from) + from;
2284 get_mac_address (u32 sw_if_index, u8 * address)
2286 vnet_main_t *vnm = vnet_get_main ();
2287 vnet_hw_interface_t *hw_if = vnet_get_sup_hw_interface (vnm, sw_if_index);
2288 if (!hw_if->hw_address)
2290 clib_memcpy (address, hw_if->hw_address, 6);
2294 static inline vlib_buffer_t *
2295 create_buffer_for_rs (vlib_main_t * vm, ip6_radv_t * radv_info)
2299 vlib_buffer_free_list_t *fl;
2300 icmp6_router_solicitation_header_t *rh;
2305 sw_if_index = radv_info->sw_if_index;
2307 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
2309 clib_warning ("buffer allocation failure");
2313 p0 = vlib_get_buffer (vm, bi0);
2314 fl = vlib_buffer_get_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2315 vlib_buffer_init_for_free_list (p0, fl);
2316 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (p0);
2317 p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
2319 vnet_buffer (p0)->sw_if_index[VLIB_RX] = sw_if_index;
2320 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index;
2322 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
2324 rh = vlib_buffer_get_current (p0);
2325 p0->current_length = sizeof (*rh);
2327 rh->neighbor.icmp.type = ICMP6_router_solicitation;
2328 rh->neighbor.icmp.code = 0;
2329 rh->neighbor.icmp.checksum = 0;
2330 rh->neighbor.reserved_must_be_zero = 0;
2332 rh->link_layer_option.header.type =
2333 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2334 if (0 != get_mac_address (sw_if_index,
2335 rh->link_layer_option.ethernet_address))
2337 clib_warning ("interface with sw_if_index %u has no mac address",
2339 vlib_buffer_free (vm, &bi0, 1);
2342 rh->link_layer_option.header.n_data_u64s = 1;
2344 payload_length = sizeof (rh->neighbor) + sizeof (u64);
2346 rh->ip.ip_version_traffic_class_and_flow_label =
2347 clib_host_to_net_u32 (0x6 << 28);
2348 rh->ip.payload_length = clib_host_to_net_u16 (payload_length);
2349 rh->ip.protocol = IP_PROTOCOL_ICMP6;
2350 rh->ip.hop_limit = 255;
2351 rh->ip.src_address = radv_info->link_local_address;
2352 /* set address ff02::2 */
2353 rh->ip.dst_address.as_u64[0] = clib_host_to_net_u64 (0xff02L << 48);
2354 rh->ip.dst_address.as_u64[1] = clib_host_to_net_u64 (2);
2356 rh->neighbor.icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, p0,
2364 stop_sending_rs (vlib_main_t * vm, ip6_radv_t * ra)
2368 ra->keep_sending_rs = 0;
2371 bi0 = vlib_get_buffer_index (vm, ra->buffer);
2372 vlib_buffer_free (vm, &bi0, 1);
2378 check_send_rs (vlib_main_t * vm, ip6_radv_t * radv_info, f64 current_time,
2388 icmp6_send_router_solicitation_params_t *params;
2390 if (!radv_info->keep_sending_rs)
2393 params = &radv_info->params;
2395 if (radv_info->due_time > current_time)
2397 *due_time = radv_info->due_time;
2401 p0 = radv_info->buffer;
2403 next_index = ip6_rewrite_mcast_node.index;
2405 c0 = vlib_buffer_copy (vm, p0);
2406 ci0 = vlib_get_buffer_index (vm, c0);
2408 f = vlib_get_frame_to_node (vm, next_index);
2409 to_next = vlib_frame_vector_args (f);
2412 vlib_put_frame_to_node (vm, next_index, f);
2414 if (params->mrc != 0 && --radv_info->n_left == 0)
2415 stop_sending_rs (vm, radv_info);
2418 radv_info->sleep_interval =
2419 (2 + random_f64_from_to (-0.1, 0.1)) * radv_info->sleep_interval;
2420 if (radv_info->sleep_interval > params->mrt)
2421 radv_info->sleep_interval =
2422 (1 + random_f64_from_to (-0.1, 0.1)) * params->mrt;
2424 radv_info->due_time = current_time + radv_info->sleep_interval;
2426 if (params->mrd != 0
2427 && current_time > radv_info->start_time + params->mrd)
2428 stop_sending_rs (vm, radv_info);
2430 *due_time = radv_info->due_time;
2433 return radv_info->keep_sending_rs;
2437 send_rs_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
2440 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2441 ip6_radv_t *radv_info;
2442 uword *event_data = 0;
2443 f64 sleep_time = 1e9;
2450 vlib_process_wait_for_event_or_clock (vm, sleep_time);
2451 vlib_process_get_events (vm, &event_data);
2452 vec_reset_length (event_data);
2454 current_time = vlib_time_now (vm);
2457 due_time = current_time + 1e9;
2459 pool_foreach (radv_info, nm->if_radv_pool,
2461 if (check_send_rs (vm, radv_info, current_time, &dt)
2466 current_time = vlib_time_now (vm);
2468 while (due_time < current_time);
2470 sleep_time = due_time - current_time;
2477 VLIB_REGISTER_NODE (send_rs_process_node) = {
2478 .function = send_rs_process,
2479 .type = VLIB_NODE_TYPE_PROCESS,
2480 .name = "send-rs-process",
2485 icmp6_send_router_solicitation (vlib_main_t * vm, u32 sw_if_index, u8 stop,
2486 icmp6_send_router_solicitation_params_t *
2489 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2493 ASSERT (~0 != sw_if_index);
2495 rai = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2496 ra = pool_elt_at_index (nm->if_radv_pool, rai);
2498 stop_sending_rs (vm, ra);
2502 ra->keep_sending_rs = 1;
2503 ra->params = *params;
2504 ra->n_left = params->mrc;
2505 ra->start_time = vlib_time_now (vm);
2506 ra->sleep_interval = (1 + random_f64_from_to (-0.1, 0.1)) * params->irt;
2507 ra->due_time = 0; /* send first packet ASAP */
2508 ra->buffer = create_buffer_for_rs (vm, ra);
2510 ra->keep_sending_rs = 0;
2512 vlib_process_signal_event (vm, send_rs_process_node.index, 1, 0);
2517 * @brief Add a multicast Address to the advertised MLD set
2520 ip6_neighbor_add_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2522 ip6_mldp_group_t *mcast_group_info;
2525 /* lookup mldp info for this interface */
2526 p = mhash_get (&radv_info->address_to_mldp_index, addr);
2528 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2531 if (!mcast_group_info)
2535 pool_get (radv_info->mldp_group_pool, mcast_group_info);
2537 mi = mcast_group_info - radv_info->mldp_group_pool;
2538 mhash_set (&radv_info->address_to_mldp_index, addr, mi, /* old_value */
2541 mcast_group_info->type = 4;
2542 mcast_group_info->mcast_source_address_pool = 0;
2543 mcast_group_info->num_sources = 0;
2544 clib_memcpy (&mcast_group_info->mcast_address, addr,
2545 sizeof (ip6_address_t));
2550 * @brief Delete a multicast Address from the advertised MLD set
2553 ip6_neighbor_del_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2555 ip6_mldp_group_t *mcast_group_info;
2558 p = mhash_get (&radv_info->address_to_mldp_index, &addr);
2560 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2562 if (mcast_group_info)
2564 mhash_unset (&radv_info->address_to_mldp_index, &addr,
2566 pool_put (radv_info->mldp_group_pool, mcast_group_info);
2571 * @brief Add a multicast Address to the advertised MLD set
2574 ip6_neighbor_add_mld_grp (ip6_radv_t * a,
2575 ip6_multicast_address_scope_t scope,
2576 ip6_multicast_link_local_group_id_t group)
2580 ip6_set_reserved_multicast_address (&addr, scope, group);
2582 ip6_neighbor_add_mld_prefix (a, &addr);
2586 * @brief create and initialize router advertisement parameters with default
2587 * values for this intfc
2590 ip6_neighbor_sw_interface_add_del (vnet_main_t * vnm,
2591 u32 sw_if_index, u32 is_add)
2593 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2596 vnet_sw_interface_t *sw_if0;
2597 ethernet_interface_t *eth_if0 = 0;
2599 /* lookup radv container - ethernet interfaces only */
2600 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2601 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2602 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2607 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2609 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2613 a = pool_elt_at_index (nm->if_radv_pool, ri);
2617 ip6_radv_prefix_t *p;
2618 ip6_mldp_group_t *m;
2620 /* release the lock on the interface's mcast adj */
2621 adj_unlock (a->mcast_adj_index);
2623 /* clean up prefix and MDP pools */
2625 pool_flush(p, a->adv_prefixes_pool,
2627 mhash_unset (&a->address_to_prefix_index, &p->prefix, 0);
2629 pool_flush (m, a->mldp_group_pool,
2631 mhash_unset (&a->address_to_mldp_index, &m->mcast_address, 0);
2635 pool_free (a->mldp_group_pool);
2636 pool_free (a->adv_prefixes_pool);
2638 mhash_free (&a->address_to_prefix_index);
2639 mhash_free (&a->address_to_mldp_index);
2641 if (a->keep_sending_rs)
2642 a->keep_sending_rs = 0;
2644 pool_put (nm->if_radv_pool, a);
2645 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ~0;
2653 pool_get (nm->if_radv_pool, a);
2655 ri = a - nm->if_radv_pool;
2656 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ri;
2658 /* initialize default values (most of which are zero) */
2659 memset (a, 0, sizeof (a[0]));
2661 a->sw_if_index = sw_if_index;
2662 a->max_radv_interval = DEF_MAX_RADV_INTERVAL;
2663 a->min_radv_interval = DEF_MIN_RADV_INTERVAL;
2664 a->curr_hop_limit = DEF_CURR_HOP_LIMIT;
2665 a->adv_router_lifetime_in_sec = DEF_DEF_RTR_LIFETIME;
2667 /* send ll address source address option */
2668 a->adv_link_layer_address = 1;
2670 a->min_delay_between_radv = MIN_DELAY_BETWEEN_RAS;
2671 a->max_delay_between_radv = MAX_DELAY_BETWEEN_RAS;
2672 a->max_rtr_default_lifetime = MAX_DEF_RTR_LIFETIME;
2673 a->seed = (u32) clib_cpu_time_now ();
2674 (void) random_u32 (&a->seed);
2675 a->randomizer = clib_cpu_time_now ();
2676 (void) random_u64 (&a->randomizer);
2678 a->initial_adverts_count = MAX_INITIAL_RTR_ADVERTISEMENTS;
2679 a->initial_adverts_sent = a->initial_adverts_count - 1;
2680 a->initial_adverts_interval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
2682 /* deafult is to send */
2685 /* fill in radv_info for this interface that will be needed later */
2687 vnet_sw_interface_get_mtu (vnm, sw_if_index, VNET_MTU_IP6);
2689 clib_memcpy (a->link_layer_address, eth_if0->address, 6);
2691 /* fill in default link-local address (this may be overridden) */
2692 ip6_link_local_address_from_ethernet_address
2693 (&a->link_local_address, eth_if0->address);
2695 mhash_init (&a->address_to_prefix_index, sizeof (uword),
2696 sizeof (ip6_address_t));
2697 mhash_init (&a->address_to_mldp_index, sizeof (uword),
2698 sizeof (ip6_address_t));
2700 a->mcast_adj_index = adj_mcast_add_or_lock (FIB_PROTOCOL_IP6,
2704 a->keep_sending_rs = 0;
2706 /* add multicast groups we will always be reporting */
2707 ip6_neighbor_add_mld_grp (a,
2708 IP6_MULTICAST_SCOPE_link_local,
2709 IP6_MULTICAST_GROUP_ID_all_hosts);
2710 ip6_neighbor_add_mld_grp (a,
2711 IP6_MULTICAST_SCOPE_link_local,
2712 IP6_MULTICAST_GROUP_ID_all_routers);
2713 ip6_neighbor_add_mld_grp (a,
2714 IP6_MULTICAST_SCOPE_link_local,
2715 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2721 /* send an mldpv2 report */
2723 ip6_neighbor_send_mldpv2_report (u32 sw_if_index)
2725 vnet_main_t *vnm = vnet_get_main ();
2726 vlib_main_t *vm = vnm->vlib_main;
2727 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2728 vnet_sw_interface_t *sw_if0;
2729 ethernet_interface_t *eth_if0;
2733 ip6_radv_t *radv_info;
2743 icmp6_multicast_listener_report_header_t *rh0;
2744 icmp6_multicast_listener_report_packet_t *rp0;
2746 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2747 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
2748 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2750 if (!eth_if0 || !vnet_sw_interface_is_admin_up (vnm, sw_if_index))
2753 /* look up the radv_t information for this interface */
2754 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2757 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2762 /* send report now - build a mldpv2 report packet */
2763 n_allocated = vlib_buffer_alloc_from_free_list (vm,
2766 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2767 if (PREDICT_FALSE (n_allocated == 0))
2769 clib_warning ("buffer allocation failure");
2773 b0 = vlib_get_buffer (vm, bo0);
2775 /* adjust the sizeof the buffer to just include the ipv6 header */
2776 b0->current_length = sizeof (icmp6_multicast_listener_report_packet_t);
2778 payload_length = sizeof (icmp6_multicast_listener_report_header_t);
2780 b0->error = ICMP6_ERROR_NONE;
2782 rp0 = vlib_buffer_get_current (b0);
2783 ip0 = (ip6_header_t *) & rp0->ip;
2784 rh0 = (icmp6_multicast_listener_report_header_t *) & rp0->report_hdr;
2786 memset (rp0, 0x0, sizeof (icmp6_multicast_listener_report_packet_t));
2788 ip0->ip_version_traffic_class_and_flow_label =
2789 clib_host_to_net_u32 (0x6 << 28);
2791 ip0->protocol = IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS;
2792 /* for DEBUG - vnet driver won't seem to emit router alerts */
2793 /* ip0->protocol = IP_PROTOCOL_ICMP6; */
2796 rh0->icmp.type = ICMP6_multicast_listener_report_v2;
2798 /* source address MUST be the link-local address */
2799 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2800 ip0->src_address = radv_info->link_local_address;
2802 /* destination is all mldpv2 routers */
2803 ip6_set_reserved_multicast_address (&ip0->dst_address,
2804 IP6_MULTICAST_SCOPE_link_local,
2805 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2807 /* add reports here */
2808 ip6_mldp_group_t *m;
2809 int num_addr_records = 0;
2810 icmp6_multicast_address_record_t rr;
2812 /* fill in the hop-by-hop extension header (router alert) info */
2813 rh0->ext_hdr.next_hdr = IP_PROTOCOL_ICMP6;
2814 rh0->ext_hdr.n_data_u64s = 0;
2816 rh0->alert.type = IP6_MLDP_ALERT_TYPE;
2818 rh0->alert.value = 0;
2823 rh0->icmp.checksum = 0;
2826 pool_foreach (m, radv_info->mldp_group_pool,
2829 rr.aux_data_len_u32s = 0;
2830 rr.num_sources = clib_host_to_net_u16 (m->num_sources);
2831 clib_memcpy(&rr.mcast_addr, &m->mcast_address, sizeof(ip6_address_t));
2835 vlib_buffer_add_data
2836 (vm, vlib_buffer_get_free_list_index (b0), bo0,
2837 (void *)&rr, sizeof(icmp6_multicast_address_record_t));
2839 payload_length += sizeof( icmp6_multicast_address_record_t);
2844 rh0->num_addr_records = clib_host_to_net_u16 (num_addr_records);
2846 /* update lengths */
2847 ip0->payload_length = clib_host_to_net_u16 (payload_length);
2849 rh0->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0,
2851 ASSERT (bogus_length == 0);
2854 * OK to override w/ no regard for actual FIB, because
2855 * ip6-rewrite only looks at the adjacency.
2857 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
2858 vnet_main.local_interface_sw_if_index;
2860 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
2861 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
2863 vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite-mcast");
2865 f = vlib_get_frame_to_node (vm, node->index);
2866 to_next = vlib_frame_vector_args (f);
2870 vlib_put_frame_to_node (vm, node->index, f);
2875 VLIB_REGISTER_NODE (ip6_icmp_router_solicitation_node,static) =
2877 .function = icmp6_router_solicitation,
2878 .name = "icmp6-router-solicitation",
2880 .vector_size = sizeof (u32),
2882 .format_trace = format_icmp6_input_trace,
2884 .n_next_nodes = ICMP6_ROUTER_SOLICITATION_N_NEXT,
2886 [ICMP6_ROUTER_SOLICITATION_NEXT_DROP] = "ip6-drop",
2887 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW] = "ip6-rewrite-mcast",
2888 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX] = "interface-output",
2893 /* send a RA or update the timer info etc.. */
2895 ip6_neighbor_process_timer_event (vlib_main_t * vm,
2896 vlib_node_runtime_t * node,
2897 vlib_frame_t * frame)
2899 vnet_main_t *vnm = vnet_get_main ();
2900 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2901 ip6_radv_t *radv_info;
2902 vlib_frame_t *f = 0;
2903 u32 n_this_frame = 0;
2904 u32 n_left_to_next = 0;
2907 icmp6_router_solicitation_header_t *h0;
2909 f64 now = vlib_time_now (vm);
2911 /* Interface ip6 radv info list */
2913 pool_foreach (radv_info, nm->if_radv_pool,
2915 if( !vnet_sw_interface_is_admin_up (vnm, radv_info->sw_if_index))
2917 radv_info->initial_adverts_sent = radv_info->initial_adverts_count-1;
2918 radv_info->next_multicast_time = now;
2919 radv_info->last_multicast_time = now;
2920 radv_info->last_radv_time = 0;
2921 radv_info->all_routers_mcast = 0;
2925 /* Make sure that we've joined the all-routers multicast group */
2926 if(!radv_info->all_routers_mcast)
2928 /* send MDLP_REPORT_EVENT message */
2929 ip6_neighbor_send_mldpv2_report(radv_info->sw_if_index);
2930 radv_info->all_routers_mcast = 1;
2933 /* is it time to send a multicast RA on this interface? */
2934 if(radv_info->send_radv && (now >= radv_info->next_multicast_time))
2939 f64 rfn = (radv_info->max_radv_interval - radv_info->min_radv_interval) *
2940 random_f64 (&radv_info->seed) + radv_info->min_radv_interval;
2942 /* multicast send - compute next multicast send time */
2943 if( radv_info->initial_adverts_sent > 0)
2945 radv_info->initial_adverts_sent--;
2946 if(rfn > radv_info-> initial_adverts_interval)
2947 rfn = radv_info-> initial_adverts_interval;
2949 /* check to see if we are ceasing to send */
2950 if( radv_info->initial_adverts_sent == 0)
2951 if(radv_info->cease_radv)
2952 radv_info->send_radv = 0;
2955 radv_info->next_multicast_time = rfn + now;
2956 radv_info->last_multicast_time = now;
2958 /* send advert now - build a "solicted" router advert with unspecified source address */
2959 n_allocated = vlib_buffer_alloc_from_free_list
2960 (vm, &bo0, n_to_alloc, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2962 if (PREDICT_FALSE(n_allocated == 0))
2964 clib_warning ("buffer allocation failure");
2967 b0 = vlib_get_buffer (vm, bo0);
2968 b0->current_length = sizeof( icmp6_router_solicitation_header_t);
2969 b0->error = ICMP6_ERROR_NONE;
2970 vnet_buffer (b0)->sw_if_index[VLIB_RX] = radv_info->sw_if_index;
2972 h0 = vlib_buffer_get_current (b0);
2974 memset (h0, 0, sizeof (icmp6_router_solicitation_header_t));
2976 h0->ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2977 h0->ip.payload_length = clib_host_to_net_u16 (sizeof (icmp6_router_solicitation_header_t)
2978 - STRUCT_OFFSET_OF (icmp6_router_solicitation_header_t, neighbor));
2979 h0->ip.protocol = IP_PROTOCOL_ICMP6;
2980 h0->ip.hop_limit = 255;
2982 /* set src/dst address as "unspecified" this marks this packet as internally generated rather than recieved */
2983 h0->ip.src_address.as_u64[0] = 0;
2984 h0->ip.src_address.as_u64[1] = 0;
2986 h0->ip.dst_address.as_u64[0] = 0;
2987 h0->ip.dst_address.as_u64[1] = 0;
2989 h0->neighbor.icmp.type = ICMP6_router_solicitation;
2991 if (PREDICT_FALSE(f == 0))
2993 f = vlib_get_frame_to_node (vm, ip6_icmp_router_solicitation_node.index);
2994 to_next = vlib_frame_vector_args (f);
2995 n_left_to_next = VLIB_FRAME_SIZE;
3004 if (PREDICT_FALSE(n_left_to_next == 0))
3006 f->n_vectors = n_this_frame;
3007 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
3016 ASSERT (n_this_frame);
3017 f->n_vectors = n_this_frame;
3018 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
3024 ip6_icmp_neighbor_discovery_event_process (vlib_main_t * vm,
3025 vlib_node_runtime_t * node,
3026 vlib_frame_t * frame)
3029 ip6_icmp_neighbor_discovery_event_data_t *event_data;
3031 /* init code here */
3035 vlib_process_wait_for_event_or_clock (vm, 1. /* seconds */ );
3037 event_data = vlib_process_get_event_data (vm, &event_type);
3041 /* No events found: timer expired. */
3042 /* process interface list and send RAs as appropriate, update timer info */
3043 ip6_neighbor_process_timer_event (vm, node, frame);
3050 case ICMP6_ND_EVENT_INIT:
3061 _vec_len (event_data) = 0;
3064 return frame->n_vectors;
3068 VLIB_REGISTER_NODE (ip6_icmp_router_advertisement_node,static) =
3070 .function = icmp6_router_advertisement,
3071 .name = "icmp6-router-advertisement",
3073 .vector_size = sizeof (u32),
3075 .format_trace = format_icmp6_input_trace,
3084 vlib_node_registration_t ip6_icmp_neighbor_discovery_event_node = {
3086 .function = ip6_icmp_neighbor_discovery_event_process,
3087 .name = "ip6-icmp-neighbor-discovery-event-process",
3088 .type = VLIB_NODE_TYPE_PROCESS,
3092 icmp6_neighbor_solicitation (vlib_main_t * vm,
3093 vlib_node_runtime_t * node, vlib_frame_t * frame)
3095 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
3096 /* is_solicitation */
3101 icmp6_neighbor_advertisement (vlib_main_t * vm,
3102 vlib_node_runtime_t * node,
3103 vlib_frame_t * frame)
3105 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
3106 /* is_solicitation */
3111 VLIB_REGISTER_NODE (ip6_icmp_neighbor_solicitation_node,static) =
3113 .function = icmp6_neighbor_solicitation,
3114 .name = "icmp6-neighbor-solicitation",
3116 .vector_size = sizeof (u32),
3118 .format_trace = format_icmp6_input_trace,
3120 .n_next_nodes = ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
3122 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP] = "ip6-drop",
3123 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY] = "interface-output",
3129 VLIB_REGISTER_NODE (ip6_icmp_neighbor_advertisement_node,static) =
3131 .function = icmp6_neighbor_advertisement,
3132 .name = "icmp6-neighbor-advertisement",
3134 .vector_size = sizeof (u32),
3136 .format_trace = format_icmp6_input_trace,
3147 IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
3148 IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX,
3149 IP6_DISCOVER_NEIGHBOR_N_NEXT,
3150 } ip6_discover_neighbor_next_t;
3154 IP6_DISCOVER_NEIGHBOR_ERROR_DROP,
3155 IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT,
3156 IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS,
3157 } ip6_discover_neighbor_error_t;
3160 ip6_discover_neighbor_inline (vlib_main_t * vm,
3161 vlib_node_runtime_t * node,
3162 vlib_frame_t * frame, int is_glean)
3164 vnet_main_t *vnm = vnet_get_main ();
3165 ip6_main_t *im = &ip6_main;
3166 ip_lookup_main_t *lm = &im->lookup_main;
3167 u32 *from, *to_next_drop;
3168 uword n_left_from, n_left_to_next_drop;
3171 u32 thread_index = vm->thread_index;
3173 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3175 if (node->flags & VLIB_NODE_FLAG_TRACE)
3176 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
3178 time_now = vlib_time_now (vm);
3179 if (time_now - im->nd_throttle_last_seed_change_time[thread_index] > 1e-3)
3181 (void) random_u64 (&im->nd_throttle_seeds[thread_index]);
3182 memset (im->nd_throttle_bitmaps[thread_index], 0,
3183 ND_THROTTLE_BITS / BITS (u8));
3185 im->nd_throttle_last_seed_change_time[thread_index] = time_now;
3187 seed = im->nd_throttle_seeds[thread_index];
3189 from = vlib_frame_vector_args (frame);
3190 n_left_from = frame->n_vectors;
3192 while (n_left_from > 0)
3194 vlib_get_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
3195 to_next_drop, n_left_to_next_drop);
3197 while (n_left_from > 0 && n_left_to_next_drop > 0)
3201 u32 pi0, adj_index0, w0, sw_if_index0, drop0;
3204 ip_adjacency_t *adj0;
3205 vnet_hw_interface_t *hw_if0;
3206 ip6_radv_t *radv_info;
3211 p0 = vlib_get_buffer (vm, pi0);
3213 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
3215 ip0 = vlib_buffer_get_current (p0);
3217 adj0 = adj_get (adj_index0);
3221 ip0->dst_address.as_u64[0] =
3222 adj0->sub_type.nbr.next_hop.ip6.as_u64[0];
3223 ip0->dst_address.as_u64[1] =
3224 adj0->sub_type.nbr.next_hop.ip6.as_u64[1];
3227 sw_if_index0 = adj0->rewrite_header.sw_if_index;
3228 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
3230 /* Compute the ND throttle bitmap hash */
3231 r0 = ip0->dst_address.as_u64[0] ^ ip0->dst_address.as_u64[1] ^ seed;
3233 /* Find the word and bit */
3234 r0 &= ND_THROTTLE_BITS - 1;
3235 w0 = r0 / BITS (uword);
3236 m0 = (uword) 1 << (r0 % BITS (uword));
3238 /* If the bit is set, drop the ND request */
3239 drop0 = (im->nd_throttle_bitmaps[thread_index][w0] & m0) != 0;
3240 /* (unconditionally) mark the bit "inuse" */
3241 im->nd_throttle_bitmaps[thread_index][w0] |= m0;
3245 to_next_drop[0] = pi0;
3247 n_left_to_next_drop -= 1;
3249 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
3251 /* If the interface is link-down, drop the pkt */
3252 if (!(hw_if0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
3255 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) > sw_if_index0)
3257 u32 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
3260 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3268 * the adj has been updated to a rewrite but the node the DPO that got
3269 * us here hasn't - yet. no big deal. we'll drop while we wait.
3271 if (IP_LOOKUP_NEXT_REWRITE == adj0->lookup_next_index)
3275 node->errors[drop0 ? IP6_DISCOVER_NEIGHBOR_ERROR_DROP
3276 : IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT];
3283 icmp6_neighbor_solicitation_header_t *h0;
3286 h0 = vlib_packet_template_get_packet
3287 (vm, &im->discover_neighbor_packet_template, &bi0);
3292 * Build ethernet header.
3293 * Choose source address based on destination lookup
3296 if (!ip6_src_address_for_packet (lm,
3299 &h0->ip.src_address))
3301 /* There is no address on the interface */
3303 node->errors[IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS];
3304 vlib_buffer_free (vm, &bi0, 1);
3309 * Destination address is a solicited node multicast address.
3310 * We need to fill in
3311 * the low 24 bits with low 24 bits of target's address.
3313 h0->ip.dst_address.as_u8[13] = ip0->dst_address.as_u8[13];
3314 h0->ip.dst_address.as_u8[14] = ip0->dst_address.as_u8[14];
3315 h0->ip.dst_address.as_u8[15] = ip0->dst_address.as_u8[15];
3317 h0->neighbor.target_address = ip0->dst_address;
3319 clib_memcpy (h0->link_layer_option.ethernet_address,
3320 hw_if0->hw_address, vec_len (hw_if0->hw_address));
3322 /* $$$$ appears we need this; why is the checksum non-zero? */
3323 h0->neighbor.icmp.checksum = 0;
3324 h0->neighbor.icmp.checksum =
3325 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h0->ip,
3328 ASSERT (bogus_length == 0);
3330 vlib_buffer_copy_trace_flag (vm, p0, bi0);
3331 b0 = vlib_get_buffer (vm, bi0);
3332 vnet_buffer (b0)->sw_if_index[VLIB_TX]
3333 = vnet_buffer (p0)->sw_if_index[VLIB_TX];
3335 vnet_buffer (b0)->ip.adj_index[VLIB_TX] =
3336 radv_info->mcast_adj_index;
3338 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
3339 next0 = IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX;
3341 vlib_set_next_frame_buffer (vm, node, next0, bi0);
3345 vlib_put_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
3346 n_left_to_next_drop);
3349 return frame->n_vectors;
3353 ip6_discover_neighbor (vlib_main_t * vm,
3354 vlib_node_runtime_t * node, vlib_frame_t * frame)
3356 return (ip6_discover_neighbor_inline (vm, node, frame, 0));
3360 ip6_glean (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3362 return (ip6_discover_neighbor_inline (vm, node, frame, 1));
3365 static char *ip6_discover_neighbor_error_strings[] = {
3366 [IP6_DISCOVER_NEIGHBOR_ERROR_DROP] = "address overflow drops",
3367 [IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT] = "neighbor solicitations sent",
3368 [IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS]
3369 = "no source address for ND solicitation",
3373 VLIB_REGISTER_NODE (ip6_glean_node) =
3375 .function = ip6_glean,
3376 .name = "ip6-glean",
3377 .vector_size = sizeof (u32),
3378 .format_trace = format_ip6_forward_next_trace,
3379 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
3380 .error_strings = ip6_discover_neighbor_error_strings,
3381 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
3384 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "ip6-drop",
3385 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "ip6-rewrite-mcast",
3388 VLIB_REGISTER_NODE (ip6_discover_neighbor_node) =
3390 .function = ip6_discover_neighbor,
3391 .name = "ip6-discover-neighbor",
3392 .vector_size = sizeof (u32),
3393 .format_trace = format_ip6_forward_next_trace,
3394 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
3395 .error_strings = ip6_discover_neighbor_error_strings,
3396 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
3399 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "ip6-drop",
3400 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "ip6-rewrite-mcast",
3405 /* API support functions */
3407 ip6_neighbor_ra_config (vlib_main_t * vm, u32 sw_if_index,
3408 u8 suppress, u8 managed, u8 other,
3409 u8 ll_option, u8 send_unicast, u8 cease,
3410 u8 use_lifetime, u32 lifetime,
3411 u32 initial_count, u32 initial_interval,
3412 u32 max_interval, u32 min_interval, u8 is_no)
3414 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3418 /* look up the radv_t information for this interface */
3419 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3421 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3422 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
3427 ip6_radv_t *radv_info;
3428 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3430 if ((max_interval != 0) && (min_interval == 0))
3431 min_interval = .75 * max_interval;
3435 0) ? ((is_no) ? DEF_MAX_RADV_INTERVAL : max_interval) :
3436 radv_info->max_radv_interval;
3439 0) ? ((is_no) ? DEF_MIN_RADV_INTERVAL : min_interval) :
3440 radv_info->min_radv_interval;
3443 0) ? ((is_no) ? DEF_DEF_RTR_LIFETIME : lifetime) :
3444 radv_info->adv_router_lifetime_in_sec;
3448 if (lifetime > MAX_DEF_RTR_LIFETIME)
3449 lifetime = MAX_DEF_RTR_LIFETIME;
3451 if (lifetime <= max_interval)
3452 return VNET_API_ERROR_INVALID_VALUE;
3455 if (min_interval != 0)
3457 if ((min_interval > .75 * max_interval) || (min_interval < 3))
3458 return VNET_API_ERROR_INVALID_VALUE;
3461 if ((initial_count > MAX_INITIAL_RTR_ADVERTISEMENTS) ||
3462 (initial_interval > MAX_INITIAL_RTR_ADVERT_INTERVAL))
3463 return VNET_API_ERROR_INVALID_VALUE;
3466 if "flag" is set and is_no is true then restore default value else set value corresponding to "flag"
3467 if "flag" is clear don't change corresponding value
3469 radv_info->send_radv =
3470 (suppress != 0) ? ((is_no != 0) ? 1 : 0) : radv_info->send_radv;
3471 radv_info->adv_managed_flag =
3472 (managed != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_managed_flag;
3473 radv_info->adv_other_flag =
3474 (other != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_other_flag;
3475 radv_info->adv_link_layer_address =
3477 0) ? ((is_no) ? 1 : 0) : radv_info->adv_link_layer_address;
3478 radv_info->send_unicast =
3479 (send_unicast != 0) ? ((is_no) ? 0 : 1) : radv_info->send_unicast;
3480 radv_info->cease_radv =
3481 (cease != 0) ? ((is_no) ? 0 : 1) : radv_info->cease_radv;
3483 radv_info->min_radv_interval = min_interval;
3484 radv_info->max_radv_interval = max_interval;
3485 radv_info->adv_router_lifetime_in_sec = lifetime;
3487 radv_info->initial_adverts_count =
3489 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERTISEMENTS : initial_count) :
3490 radv_info->initial_adverts_count;
3491 radv_info->initial_adverts_interval =
3492 (initial_interval !=
3493 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERT_INTERVAL : initial_interval) :
3494 radv_info->initial_adverts_interval;
3497 if ((cease != 0) && (is_no))
3498 radv_info->send_radv = 1;
3500 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
3501 radv_info->next_multicast_time = vlib_time_now (vm);
3502 radv_info->last_multicast_time = vlib_time_now (vm);
3503 radv_info->last_radv_time = 0;
3509 ip6_neighbor_ra_prefix (vlib_main_t * vm, u32 sw_if_index,
3510 ip6_address_t * prefix_addr, u8 prefix_len,
3511 u8 use_default, u32 val_lifetime, u32 pref_lifetime,
3512 u8 no_advertise, u8 off_link, u8 no_autoconfig,
3513 u8 no_onlink, u8 is_no)
3515 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3520 /* look up the radv_t information for this interface */
3521 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3524 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3526 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
3530 f64 now = vlib_time_now (vm);
3531 ip6_radv_t *radv_info;
3532 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3534 /* prefix info add, delete or update */
3535 ip6_radv_prefix_t *prefix;
3537 /* lookup prefix info for this address on this interface */
3538 uword *p = mhash_get (&radv_info->address_to_prefix_index, prefix_addr);
3540 prefix = p ? pool_elt_at_index (radv_info->adv_prefixes_pool, p[0]) : 0;
3546 return VNET_API_ERROR_INVALID_VALUE; /* invalid prefix */
3548 if (prefix->prefix_len != prefix_len)
3549 return VNET_API_ERROR_INVALID_VALUE_2;
3551 /* FIXME - Should the DP do this or the CP ? */
3552 /* do specific delete processing here before returning */
3553 /* try to remove from routing table */
3555 mhash_unset (&radv_info->address_to_prefix_index, prefix_addr,
3557 pool_put (radv_info->adv_prefixes_pool, prefix);
3559 radv_info->initial_adverts_sent =
3560 radv_info->initial_adverts_count - 1;
3561 radv_info->next_multicast_time = vlib_time_now (vm);
3562 radv_info->last_multicast_time = vlib_time_now (vm);
3563 radv_info->last_radv_time = 0;
3567 /* adding or changing */
3572 pool_get (radv_info->adv_prefixes_pool, prefix);
3573 pi = prefix - radv_info->adv_prefixes_pool;
3574 mhash_set (&radv_info->address_to_prefix_index, prefix_addr, pi,
3577 memset (prefix, 0x0, sizeof (ip6_radv_prefix_t));
3579 prefix->prefix_len = prefix_len;
3580 clib_memcpy (&prefix->prefix, prefix_addr, sizeof (ip6_address_t));
3582 /* initialize default values */
3583 prefix->adv_on_link_flag = 1; /* L bit set */
3584 prefix->adv_autonomous_flag = 1; /* A bit set */
3585 prefix->adv_valid_lifetime_in_secs = DEF_ADV_VALID_LIFETIME;
3586 prefix->adv_pref_lifetime_in_secs = DEF_ADV_PREF_LIFETIME;
3587 prefix->enabled = 1;
3588 prefix->decrement_lifetime_flag = 1;
3589 prefix->deprecated_prefix_flag = 1;
3593 /* FIXME - Should the DP do this or the CP ? */
3594 /* insert prefix into routing table as a connected prefix */
3603 if (prefix->prefix_len != prefix_len)
3604 return VNET_API_ERROR_INVALID_VALUE_2;
3608 /* FIXME - Should the DP do this or the CP ? */
3609 /* remove from routing table if already there */
3613 if ((val_lifetime == ~0) || (pref_lifetime == ~0))
3615 prefix->adv_valid_lifetime_in_secs = ~0;
3616 prefix->adv_pref_lifetime_in_secs = ~0;
3617 prefix->decrement_lifetime_flag = 0;
3621 prefix->adv_valid_lifetime_in_secs = val_lifetime;;
3622 prefix->adv_pref_lifetime_in_secs = pref_lifetime;
3625 /* copy remaining */
3626 prefix->enabled = !(no_advertise != 0);
3627 prefix->adv_on_link_flag = !((off_link != 0) || (no_onlink != 0));
3628 prefix->adv_autonomous_flag = !(no_autoconfig != 0);
3632 /* fill in the expiration times */
3633 prefix->valid_lifetime_expires =
3634 now + prefix->adv_valid_lifetime_in_secs;
3635 prefix->pref_lifetime_expires = now + prefix->adv_pref_lifetime_in_secs;
3637 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
3638 radv_info->next_multicast_time = vlib_time_now (vm);
3639 radv_info->last_multicast_time = vlib_time_now (vm);
3640 radv_info->last_radv_time = 0;
3646 ip6_neighbor_cmd (vlib_main_t * vm, unformat_input_t * main_input,
3647 vlib_cli_command_t * cmd)
3649 vnet_main_t *vnm = vnet_get_main ();
3650 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3651 clib_error_t *error = 0;
3653 u8 suppress = 0, managed = 0, other = 0;
3654 u8 suppress_ll_option = 0, send_unicast = 0, cease = 0;
3655 u8 use_lifetime = 0;
3656 u32 sw_if_index, ra_lifetime = 0, ra_initial_count =
3657 0, ra_initial_interval = 0;
3658 u32 ra_max_interval = 0, ra_min_interval = 0;
3660 unformat_input_t _line_input, *line_input = &_line_input;
3661 vnet_sw_interface_t *sw_if0;
3663 int add_radv_info = 1;
3664 __attribute__ ((unused)) ip6_radv_t *radv_info = 0;
3665 ip6_address_t ip6_addr;
3669 /* Get a line of input. */
3670 if (!unformat_user (main_input, unformat_line_input, line_input))
3673 /* get basic radv info for this interface */
3674 if (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3677 if (unformat_user (line_input,
3678 unformat_vnet_sw_interface, vnm, &sw_if_index))
3681 ethernet_interface_t *eth_if0 = 0;
3683 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
3684 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
3686 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
3691 clib_error_return (0, "Interface must be of ethernet type");
3695 /* look up the radv_t information for this interface */
3696 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3699 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3703 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3707 error = clib_error_return (0, "unknown interface %U'",
3708 format_unformat_error, line_input);
3714 error = clib_error_return (0, "invalid interface name %U'",
3715 format_unformat_error, line_input);
3720 /* get the rest of the command */
3721 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3723 if (unformat (line_input, "no"))
3725 else if (unformat (line_input, "prefix %U/%d",
3726 unformat_ip6_address, &ip6_addr, &addr_len))
3731 else if (unformat (line_input, "ra-managed-config-flag"))
3736 else if (unformat (line_input, "ra-other-config-flag"))
3741 else if (unformat (line_input, "ra-suppress") ||
3742 unformat (line_input, "ra-surpress"))
3747 else if (unformat (line_input, "ra-suppress-link-layer") ||
3748 unformat (line_input, "ra-surpress-link-layer"))
3750 suppress_ll_option = 1;
3753 else if (unformat (line_input, "ra-send-unicast"))
3758 else if (unformat (line_input, "ra-lifetime"))
3760 if (!unformat (line_input, "%d", &ra_lifetime))
3762 error = unformat_parse_error (line_input);
3768 else if (unformat (line_input, "ra-initial"))
3771 (line_input, "%d %d", &ra_initial_count, &ra_initial_interval))
3773 error = unformat_parse_error (line_input);
3778 else if (unformat (line_input, "ra-interval"))
3780 if (!unformat (line_input, "%d", &ra_max_interval))
3782 error = unformat_parse_error (line_input);
3786 if (!unformat (line_input, "%d", &ra_min_interval))
3787 ra_min_interval = 0;
3790 else if (unformat (line_input, "ra-cease"))
3797 error = unformat_parse_error (line_input);
3804 ip6_neighbor_ra_config (vm, sw_if_index,
3805 suppress, managed, other,
3806 suppress_ll_option, send_unicast, cease,
3807 use_lifetime, ra_lifetime,
3808 ra_initial_count, ra_initial_interval,
3809 ra_max_interval, ra_min_interval, is_no);
3813 u32 valid_lifetime_in_secs = 0;
3814 u32 pref_lifetime_in_secs = 0;
3815 u8 use_prefix_default_values = 0;
3816 u8 no_advertise = 0;
3818 u8 no_autoconfig = 0;
3821 /* get the rest of the command */
3822 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3824 if (unformat (line_input, "default"))
3826 use_prefix_default_values = 1;
3829 else if (unformat (line_input, "infinite"))
3831 valid_lifetime_in_secs = ~0;
3832 pref_lifetime_in_secs = ~0;
3835 else if (unformat (line_input, "%d %d", &valid_lifetime_in_secs,
3836 &pref_lifetime_in_secs))
3843 /* get the rest of the command */
3844 while (!use_prefix_default_values &&
3845 unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3847 if (unformat (line_input, "no-advertise"))
3849 else if (unformat (line_input, "off-link"))
3851 else if (unformat (line_input, "no-autoconfig"))
3853 else if (unformat (line_input, "no-onlink"))
3857 error = unformat_parse_error (line_input);
3862 ip6_neighbor_ra_prefix (vm, sw_if_index,
3863 &ip6_addr, addr_len,
3864 use_prefix_default_values,
3865 valid_lifetime_in_secs,
3866 pref_lifetime_in_secs,
3868 off_link, no_autoconfig, no_onlink, is_no);
3872 unformat_free (line_input);
3878 ip6_print_addrs (vlib_main_t * vm, u32 * addrs)
3880 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3883 for (i = 0; i < vec_len (addrs); i++)
3885 ip_interface_address_t *a =
3886 pool_elt_at_index (lm->if_address_pool, addrs[i]);
3887 ip6_address_t *address = ip_interface_address_get_address (lm, a);
3889 vlib_cli_output (vm, "\t\t%U/%d",
3890 format_ip6_address, address, a->address_length);
3894 static clib_error_t *
3895 show_ip6_interface_cmd (vlib_main_t * vm,
3896 unformat_input_t * input, vlib_cli_command_t * cmd)
3898 vnet_main_t *vnm = vnet_get_main ();
3899 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3900 clib_error_t *error = 0;
3905 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3909 /* look up the radv_t information for this interface */
3910 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3913 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3917 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3918 ip6_radv_t *radv_info;
3919 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3921 vlib_cli_output (vm, "%U is admin %s\n",
3922 format_vnet_sw_interface_name, vnm,
3923 vnet_get_sw_interface (vnm, sw_if_index),
3924 (vnet_sw_interface_is_admin_up (vnm, sw_if_index) ?
3928 u32 *link_scope = 0, *global_scope = 0;
3929 u32 *local_scope = 0, *unknown_scope = 0;
3930 ip_interface_address_t *a;
3932 vec_validate_init_empty (lm->if_address_pool_index_by_sw_if_index,
3934 ai = lm->if_address_pool_index_by_sw_if_index[sw_if_index];
3936 while (ai != (u32) ~ 0)
3938 a = pool_elt_at_index (lm->if_address_pool, ai);
3939 ip6_address_t *address =
3940 ip_interface_address_get_address (lm, a);
3942 if (ip6_address_is_link_local_unicast (address))
3943 vec_add1 (link_scope, ai);
3944 else if (ip6_address_is_global_unicast (address))
3945 vec_add1 (global_scope, ai);
3946 else if (ip6_address_is_local_unicast (address))
3947 vec_add1 (local_scope, ai);
3949 vec_add1 (unknown_scope, ai);
3951 ai = a->next_this_sw_interface;
3954 if (vec_len (link_scope))
3956 vlib_cli_output (vm, "\tLink-local address(es):\n");
3957 ip6_print_addrs (vm, link_scope);
3958 vec_free (link_scope);
3961 if (vec_len (local_scope))
3963 vlib_cli_output (vm, "\tLocal unicast address(es):\n");
3964 ip6_print_addrs (vm, local_scope);
3965 vec_free (local_scope);
3968 if (vec_len (global_scope))
3970 vlib_cli_output (vm, "\tGlobal unicast address(es):\n");
3971 ip6_print_addrs (vm, global_scope);
3972 vec_free (global_scope);
3975 if (vec_len (unknown_scope))
3977 vlib_cli_output (vm, "\tOther-scope address(es):\n");
3978 ip6_print_addrs (vm, unknown_scope);
3979 vec_free (unknown_scope);
3982 vlib_cli_output (vm, "\tLink-local address(es):\n");
3983 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
3984 &radv_info->link_local_address);
3986 vlib_cli_output (vm, "\tJoined group address(es):\n");
3987 ip6_mldp_group_t *m;
3989 pool_foreach (m, radv_info->mldp_group_pool,
3991 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
3996 vlib_cli_output (vm, "\tAdvertised Prefixes:\n");
3997 ip6_radv_prefix_t *p;
3999 pool_foreach (p, radv_info->adv_prefixes_pool,
4001 vlib_cli_output (vm, "\t\tprefix %U, length %d\n",
4002 format_ip6_address, &p->prefix, p->prefix_len);
4006 vlib_cli_output (vm, "\tMTU is %d\n", radv_info->adv_link_mtu);
4007 vlib_cli_output (vm, "\tICMP error messages are unlimited\n");
4008 vlib_cli_output (vm, "\tICMP redirects are disabled\n");
4009 vlib_cli_output (vm, "\tICMP unreachables are not sent\n");
4010 vlib_cli_output (vm, "\tND DAD is disabled\n");
4011 //vlib_cli_output (vm, "\tND reachable time is %d milliseconds\n",);
4012 vlib_cli_output (vm, "\tND advertised reachable time is %d\n",
4013 radv_info->adv_neighbor_reachable_time_in_msec);
4014 vlib_cli_output (vm,
4015 "\tND advertised retransmit interval is %d (msec)\n",
4017 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
4019 u32 ra_interval = radv_info->max_radv_interval;
4020 u32 ra_interval_min = radv_info->min_radv_interval;
4021 vlib_cli_output (vm,
4022 "\tND router advertisements are sent every %d seconds (min interval is %d)\n",
4023 ra_interval, ra_interval_min);
4024 vlib_cli_output (vm,
4025 "\tND router advertisements live for %d seconds\n",
4026 radv_info->adv_router_lifetime_in_sec);
4027 vlib_cli_output (vm,
4028 "\tHosts %s stateless autoconfig for addresses\n",
4029 (radv_info->adv_managed_flag) ? "use" :
4031 vlib_cli_output (vm, "\tND router advertisements sent %d\n",
4032 radv_info->n_advertisements_sent);
4033 vlib_cli_output (vm, "\tND router solicitations received %d\n",
4034 radv_info->n_solicitations_rcvd);
4035 vlib_cli_output (vm, "\tND router solicitations dropped %d\n",
4036 radv_info->n_solicitations_dropped);
4040 error = clib_error_return (0, "IPv6 not enabled on interface",
4041 format_unformat_error, input);
4049 * This command is used to display various IPv6 attributes on a given
4053 * Example of how to display IPv6 settings:
4054 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
4055 * GigabitEthernet2/0/0 is admin up
4056 * Link-local address(es):
4058 * Joined group address(es):
4063 * Advertised Prefixes:
4064 * prefix fe80::fe:28ff:fe9c:75b3, length 64
4066 * ICMP error messages are unlimited
4067 * ICMP redirects are disabled
4068 * ICMP unreachables are not sent
4069 * ND DAD is disabled
4070 * ND advertised reachable time is 0
4071 * ND advertised retransmit interval is 0 (msec)
4072 * ND router advertisements are sent every 200 seconds (min interval is 150)
4073 * ND router advertisements live for 600 seconds
4074 * Hosts use stateless autoconfig for addresses
4075 * ND router advertisements sent 19336
4076 * ND router solicitations received 0
4077 * ND router solicitations dropped 0
4079 * Example of output if IPv6 is not enabled on the interface:
4080 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
4081 * show ip6 interface: IPv6 not enabled on interface
4085 VLIB_CLI_COMMAND (show_ip6_interface_command, static) =
4087 .path = "show ip6 interface",
4088 .function = show_ip6_interface_cmd,
4089 .short_help = "show ip6 interface <interface>",
4094 disable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
4096 clib_error_t *error = 0;
4097 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4100 /* look up the radv_t information for this interface */
4101 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
4103 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4105 /* if not created - do nothing */
4108 ip6_radv_t *radv_info;
4110 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4112 /* check radv_info ref count for other ip6 addresses on this interface */
4113 /* This implicitly excludes the link local address */
4114 if (radv_info->ref_count == 0)
4116 /* essentially "disables" ipv6 on this interface */
4117 ip6_ll_prefix_t ilp = {
4118 .ilp_addr = radv_info->link_local_address,
4119 .ilp_sw_if_index = sw_if_index,
4121 ip6_ll_table_entry_delete (&ilp);
4122 ip6_sw_interface_enable_disable (sw_if_index, 0);
4123 ip6_mfib_interface_enable_disable (sw_if_index, 0);
4124 ip6_neighbor_sw_interface_add_del (vnet_get_main (), sw_if_index,
4132 ip6_interface_enabled (vlib_main_t * vm, u32 sw_if_index)
4134 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4137 /* look up the radv_t information for this interface */
4138 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
4141 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4147 enable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
4149 clib_error_t *error = 0;
4150 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4154 /* look up the radv_t information for this interface */
4155 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
4158 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4160 /* if not created yet */
4163 vnet_main_t *vnm = vnet_get_main ();
4164 vnet_sw_interface_t *sw_if0;
4166 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
4167 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
4169 ethernet_interface_t *eth_if0;
4172 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
4175 /* create radv_info. for this interface. This holds all the info needed for router adverts */
4177 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, is_add);
4181 ip6_radv_t *radv_info;
4182 ip6_address_t link_local_address;
4184 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4186 ip6_link_local_address_from_ethernet_mac_address
4187 (&link_local_address, eth_if0->address);
4189 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index);
4190 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_SUB ||
4191 sw_if0->type == VNET_SW_INTERFACE_TYPE_PIPE ||
4192 sw_if0->type == VNET_SW_INTERFACE_TYPE_P2P)
4194 /* make up an interface id */
4195 link_local_address.as_u64[1] =
4196 random_u64 (&radv_info->randomizer);
4198 link_local_address.as_u64[0] =
4199 clib_host_to_net_u64 (0xFE80000000000000ULL);
4201 link_local_address.as_u8[8] &= 0xfd;
4204 ip6_ll_prefix_t ilp = {
4205 .ilp_addr = link_local_address,
4206 .ilp_sw_if_index = sw_if_index,
4209 ip6_ll_table_entry_update (&ilp, FIB_ROUTE_PATH_LOCAL);
4212 /* essentially "enables" ipv6 on this interface */
4213 ip6_mfib_interface_enable_disable (sw_if_index, 1);
4214 ip6_sw_interface_enable_disable (sw_if_index, 1);
4218 radv_info->link_local_address = link_local_address;
4228 ip6_get_ll_address (u32 sw_if_index, ip6_address_t * addr)
4230 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4231 ip6_radv_t *radv_info;
4234 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) <= sw_if_index)
4237 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4242 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4243 *addr = radv_info->link_local_address;
4248 static clib_error_t *
4249 enable_ip6_interface_cmd (vlib_main_t * vm,
4250 unformat_input_t * input, vlib_cli_command_t * cmd)
4252 vnet_main_t *vnm = vnet_get_main ();
4253 clib_error_t *error = 0;
4258 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4260 enable_ip6_interface (vm, sw_if_index);
4264 error = clib_error_return (0, "unknown interface\n'",
4265 format_unformat_error, input);
4272 * This command is used to enable IPv6 on a given interface.
4275 * Example of how enable IPv6 on a given interface:
4276 * @cliexcmd{enable ip6 interface GigabitEthernet2/0/0}
4279 VLIB_CLI_COMMAND (enable_ip6_interface_command, static) =
4281 .path = "enable ip6 interface",
4282 .function = enable_ip6_interface_cmd,
4283 .short_help = "enable ip6 interface <interface>",
4287 static clib_error_t *
4288 disable_ip6_interface_cmd (vlib_main_t * vm,
4289 unformat_input_t * input, vlib_cli_command_t * cmd)
4291 vnet_main_t *vnm = vnet_get_main ();
4292 clib_error_t *error = 0;
4297 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4299 error = disable_ip6_interface (vm, sw_if_index);
4303 error = clib_error_return (0, "unknown interface\n'",
4304 format_unformat_error, input);
4311 * This command is used to disable IPv6 on a given interface.
4314 * Example of how disable IPv6 on a given interface:
4315 * @cliexcmd{disable ip6 interface GigabitEthernet2/0/0}
4318 VLIB_CLI_COMMAND (disable_ip6_interface_command, static) =
4320 .path = "disable ip6 interface",
4321 .function = disable_ip6_interface_cmd,
4322 .short_help = "disable ip6 interface <interface>",
4327 * This command is used to configure the neighbor discovery
4328 * parameters on a given interface. Use the '<em>show ip6 interface</em>'
4329 * command to display some of the current neighbor discovery parameters
4330 * on a given interface. This command has three formats:
4333 * <b>Format 1 - Router Advertisement Options:</b> (Only one can be entered in a single command)
4335 * '<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>'
4339 * <em>[no] ra-managed-config-flag</em> - Advertises in ICMPv6
4340 * router-advertisement messages to use stateful address
4341 * auto-configuration to obtain address information (sets the M-bit).
4342 * Default is the M-bit is not set and the '<em>no</em>' option
4343 * returns it to this default state.
4345 * <em>[no] ra-other-config-flag</em> - Indicates in ICMPv6
4346 * router-advertisement messages that hosts use stateful auto
4347 * configuration to obtain nonaddress related information (sets
4348 * the O-bit). Default is the O-bit is not set and the '<em>no</em>'
4349 * option returns it to this default state.
4351 * <em>[no] ra-suppress</em> - Disables sending ICMPv6 router-advertisement
4352 * messages. The '<em>no</em>' option implies to enable sending ICMPv6
4353 * router-advertisement messages.
4355 * <em>[no] ra-suppress-link-layer</em> - Indicates not to include the
4356 * optional source link-layer address in the ICMPv6 router-advertisement
4357 * messages. Default is to include the optional source link-layer address
4358 * and the '<em>no</em>' option returns it to this default state.
4360 * <em>[no] ra-send-unicast</em> - Use the source address of the
4361 * router-solicitation message if availiable. The default is to use
4362 * multicast address of all nodes, and the '<em>no</em>' option returns
4363 * it to this default state.
4365 * <em>[no] ra-lifetime <lifetime></em> - Advertises the lifetime of a
4366 * default router in ICMPv6 router-advertisement messages. The range is
4367 * from 0 to 9000 seconds. '<em><lifetime></em>' must be greater than
4368 * '<em><max-interval></em>'. The default value is 600 seconds and the
4369 * '<em>no</em>' option returns it to this default value.
4371 * <em>[no] ra-initial <cnt> <interval></em> - Number of initial ICMPv6
4372 * router-advertisement messages sent and the interval between each
4373 * message. Range for count is 1 - 3 and default is 3. Range for interval
4374 * is 1 to 16 seconds, and default is 16 seconds. The '<em>no</em>' option
4375 * returns both to their default value.
4377 * <em>[no] ra-interval <max-interval> [<min-interval>]</em> - Configures the
4378 * interval between sending ICMPv6 router-advertisement messages. The
4379 * range for max-interval is from 4 to 200 seconds. min-interval can not
4380 * be more than 75% of max-interval. If not set, min-interval will be
4381 * set to 75% of max-interval. The range for min-interval is from 3 to
4382 * 150 seconds. The '<em>no</em>' option returns both to their default
4385 * <em>[no] ra-cease</em> - Cease sending ICMPv6 router-advertisement messages.
4386 * The '<em>no</em>' options implies to start (or restart) sending
4387 * ICMPv6 router-advertisement messages.
4390 * <b>Format 2 - Prefix Options:</b>
4392 * '<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>'
4396 * <em>no</em> - All additional flags are ignored and the prefix is deleted.
4398 * <em><valid-lifetime> <pref-lifetime></em> - '<em><valid-lifetime></em>' is the
4399 * length of time in seconds during what the prefix is valid for the purpose of
4400 * on-link determination. Range is 7203 to 2592000 seconds and default is 2592000
4401 * seconds (30 days). '<em><pref-lifetime></em>' is the prefered-lifetime and is the
4402 * length of time in seconds during what addresses generated from the prefix remain
4403 * preferred. Range is 0 to 604800 seconds and default is 604800 seconds (7 days).
4405 * <em>infinite</em> - Both '<em><valid-lifetime></em>' and '<em><<pref-lifetime></em>'
4406 * are inifinte, no timeout.
4408 * <em>no-advertise</em> - Do not send full router address in prefix
4409 * advertisement. Default is to advertise (i.e. - This flag is off by default).
4411 * <em>off-link</em> - Prefix is off-link, clear L-bit in packet. Default is on-link
4412 * (i.e. - This flag is off and L-bit in packet is set by default and this prefix can
4413 * be used for on-link determination). '<em>no-onlink</em>' also controls the L-bit.
4415 * <em>no-autoconfig</em> - Do not use prefix for autoconfiguration, clear A-bit in packet.
4416 * Default is autoconfig (i.e. - This flag is off and A-bit in packet is set by default.
4418 * <em>no-onlink</em> - Do not use prefix for onlink determination, clear L-bit in packet.
4419 * Default is on-link (i.e. - This flag is off and L-bit in packet is set by default and
4420 * this prefix can be used for on-link determination). '<em>off-link</em>' also controls
4424 * <b>Format 3: - Default of Prefix:</b>
4426 * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> default</b></em>'
4428 * When a new prefix is added (or existing one is being overwritten) <em>default</em>
4429 * uses default values for the prefix. If <em>no</em> is used, the <em>default</em>
4430 * is ignored and the prefix is deleted.
4434 * Example of how set a router advertisement option:
4435 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 ra-interval 100 20}
4436 * Example of how to add a prefix:
4437 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 prefix fe80::fe:28ff:fe9c:75b3/64 infinite no-advertise}
4438 * Example of how to delete a prefix:
4439 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 no prefix fe80::fe:28ff:fe9c:75b3/64}
4442 VLIB_CLI_COMMAND (ip6_nd_command, static) =
4445 .short_help = "ip6 nd <interface> ...",
4446 .function = ip6_neighbor_cmd,
4451 set_ip6_link_local_address (vlib_main_t * vm,
4452 u32 sw_if_index, ip6_address_t * address)
4454 clib_error_t *error = 0;
4455 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4457 ip6_radv_t *radv_info;
4458 vnet_main_t *vnm = vnet_get_main ();
4460 if (!ip6_address_is_link_local_unicast (address))
4462 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_LINK_LOCAL;
4463 return (error = clib_error_return (0, "address not link-local",
4464 format_unformat_error));
4467 /* call enable ipv6 */
4468 enable_ip6_interface (vm, sw_if_index);
4470 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4474 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4476 /* save if link local address (overwrite default) */
4478 /* delete the old one */
4479 error = ip6_add_del_interface_address (vm, sw_if_index,
4480 &radv_info->link_local_address,
4481 128, 1 /* is_del */ );
4485 /* add the new one */
4486 error = ip6_add_del_interface_address (vm, sw_if_index,
4492 radv_info->link_local_address = *address;
4498 vnm->api_errno = VNET_API_ERROR_IP6_NOT_ENABLED;
4499 error = clib_error_return (0, "ip6 not enabled for interface",
4500 format_unformat_error);
4506 set_ip6_link_local_address_cmd (vlib_main_t * vm,
4507 unformat_input_t * input,
4508 vlib_cli_command_t * cmd)
4510 vnet_main_t *vnm = vnet_get_main ();
4511 clib_error_t *error = 0;
4513 ip6_address_t ip6_addr;
4515 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4517 /* get the rest of the command */
4518 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
4520 if (unformat (input, "%U", unformat_ip6_address, &ip6_addr))
4523 return (unformat_parse_error (input));
4526 error = set_ip6_link_local_address (vm, sw_if_index, &ip6_addr);
4531 * This command is used to assign an IPv6 Link-local address to an
4532 * interface. This command will enable IPv6 on an interface if it
4533 * is not already enabled. Use the '<em>show ip6 interface</em>' command
4534 * to display the assigned Link-local address.
4537 * Example of how to assign an IPv6 Link-local address to an interface:
4538 * @cliexcmd{set ip6 link-local address GigabitEthernet2/0/0 FE80::AB8}
4541 VLIB_CLI_COMMAND (set_ip6_link_local_address_command, static) =
4543 .path = "set ip6 link-local address",
4544 .short_help = "set ip6 link-local address <interface> <ip6-address>",
4545 .function = set_ip6_link_local_address_cmd,
4550 * @brief callback when an interface address is added or deleted
4553 ip6_neighbor_add_del_interface_address (ip6_main_t * im,
4556 ip6_address_t * address,
4558 u32 if_address_index, u32 is_delete)
4560 vnet_main_t *vnm = vnet_get_main ();
4561 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4563 vlib_main_t *vm = vnm->vlib_main;
4564 ip6_radv_t *radv_info;
4567 /* create solicited node multicast address for this interface adddress */
4568 ip6_set_solicited_node_multicast_address (&a, 0);
4570 a.as_u8[0xd] = address->as_u8[0xd];
4571 a.as_u8[0xe] = address->as_u8[0xe];
4572 a.as_u8[0xf] = address->as_u8[0xf];
4576 /* try to create radv_info - does nothing if ipv6 already enabled */
4577 enable_ip6_interface (vm, sw_if_index);
4579 /* look up the radv_t information for this interface */
4580 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
4582 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4586 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4589 if (!ip6_address_is_link_local_unicast (address))
4590 radv_info->ref_count++;
4592 ip6_neighbor_add_mld_prefix (radv_info, &a);
4599 /* look up the radv_t information for this interface */
4600 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
4602 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4607 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4609 ip6_neighbor_del_mld_prefix (radv_info, &a);
4611 /* if interface up send MLDP "report" */
4612 radv_info->all_routers_mcast = 0;
4615 if (!ip6_address_is_link_local_unicast (address))
4616 radv_info->ref_count--;
4618 /* Ensure that IPv6 is disabled, and LL removed after ref_count reaches 0 */
4619 disable_ip6_interface (vm, sw_if_index);
4624 ip6_set_neighbor_limit (u32 neighbor_limit)
4626 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4628 nm->limit_neighbor_cache_size = neighbor_limit;
4633 ip6_neighbor_table_bind (ip6_main_t * im,
4636 u32 new_fib_index, u32 old_fib_index)
4638 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4639 ip6_neighbor_t *n = NULL;
4640 u32 i, *to_re_add = 0;
4643 pool_foreach (n, nm->neighbor_pool,
4645 if (n->key.sw_if_index == sw_if_index)
4646 vec_add1 (to_re_add, n - nm->neighbor_pool);
4650 for (i = 0; i < vec_len (to_re_add); i++)
4652 n = pool_elt_at_index (nm->neighbor_pool, to_re_add[i]);
4653 ip6_neighbor_adj_fib_remove (n, old_fib_index);
4654 ip6_neighbor_adj_fib_add (n, new_fib_index);
4656 vec_free (to_re_add);
4659 static clib_error_t *
4660 ip6_neighbor_init (vlib_main_t * vm)
4662 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4663 ip6_main_t *im = &ip6_main;
4665 mhash_init (&nm->neighbor_index_by_key,
4666 /* value size */ sizeof (uword),
4667 /* key size */ sizeof (ip6_neighbor_key_t));
4669 icmp6_register_type (vm, ICMP6_neighbor_solicitation,
4670 ip6_icmp_neighbor_solicitation_node.index);
4671 icmp6_register_type (vm, ICMP6_neighbor_advertisement,
4672 ip6_icmp_neighbor_advertisement_node.index);
4673 icmp6_register_type (vm, ICMP6_router_solicitation,
4674 ip6_icmp_router_solicitation_node.index);
4675 icmp6_register_type (vm, ICMP6_router_advertisement,
4676 ip6_icmp_router_advertisement_node.index);
4678 /* handler node for ip6 neighbor discovery events and timers */
4679 vlib_register_node (vm, &ip6_icmp_neighbor_discovery_event_node);
4681 /* add call backs */
4682 ip6_add_del_interface_address_callback_t cb;
4683 memset (&cb, 0x0, sizeof (ip6_add_del_interface_address_callback_t));
4685 /* when an interface address changes... */
4686 cb.function = ip6_neighbor_add_del_interface_address;
4687 cb.function_opaque = 0;
4688 vec_add1 (im->add_del_interface_address_callbacks, cb);
4690 ip6_table_bind_callback_t cbt;
4691 cbt.function = ip6_neighbor_table_bind;
4692 cbt.function_opaque = 0;
4693 vec_add1 (im->table_bind_callbacks, cbt);
4695 mhash_init (&nm->pending_resolutions_by_address,
4696 /* value size */ sizeof (uword),
4697 /* key size */ sizeof (ip6_address_t));
4699 mhash_init (&nm->mac_changes_by_address,
4700 /* value size */ sizeof (uword),
4701 /* key size */ sizeof (ip6_address_t));
4703 /* default, configurable */
4704 nm->limit_neighbor_cache_size = 50000;
4706 nm->wc_ip6_nd_publisher_node = (uword) ~ 0;
4708 nm->ip6_ra_publisher_node = (uword) ~ 0;
4711 /* $$$$ Hack fix for today */
4712 vec_validate_init_empty
4713 (im->discover_neighbor_next_index_by_hw_if_index, 32, 0 /* drop */ );
4719 VLIB_INIT_FUNCTION (ip6_neighbor_init);
4723 vnet_register_ip6_neighbor_resolution_event (vnet_main_t * vnm,
4726 uword type_opaque, uword data)
4728 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4729 ip6_address_t *address = address_arg;
4731 pending_resolution_t *pr;
4733 pool_get (nm->pending_resolutions, pr);
4735 pr->next_index = ~0;
4736 pr->node_index = node_index;
4737 pr->type_opaque = type_opaque;
4740 p = mhash_get (&nm->pending_resolutions_by_address, address);
4743 /* Insert new resolution at the head of the list */
4744 pr->next_index = p[0];
4745 mhash_unset (&nm->pending_resolutions_by_address, address, 0);
4748 mhash_set (&nm->pending_resolutions_by_address, address,
4749 pr - nm->pending_resolutions, 0 /* old value */ );
4753 vnet_add_del_ip6_nd_change_event (vnet_main_t * vnm,
4754 void *data_callback,
4758 uword type_opaque, uword data, int is_add)
4760 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4761 ip6_address_t *address = address_arg;
4763 /* Try to find an existing entry */
4764 u32 *first = (u32 *) mhash_get (&nm->mac_changes_by_address, address);
4766 pending_resolution_t *mc;
4767 while (p && *p != ~0)
4769 mc = pool_elt_at_index (nm->mac_changes, *p);
4770 if (mc->node_index == node_index && mc->type_opaque == type_opaque
4773 p = &mc->next_index;
4776 int found = p && *p != ~0;
4780 return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
4782 pool_get (nm->mac_changes, mc);
4784 *mc = (pending_resolution_t)
4787 .node_index = node_index,
4788 .type_opaque = type_opaque,
4790 .data_callback = data_callback,
4795 /* Insert new resolution at the end of the list */
4796 u32 new_idx = mc - nm->mac_changes;
4800 mhash_set (&nm->mac_changes_by_address, address, new_idx, 0);
4805 return VNET_API_ERROR_NO_SUCH_ENTRY;
4807 /* Clients may need to clean up pool entries, too */
4808 void (*fp) (u32, u8 *) = data_callback;
4810 (*fp) (mc->data, 0 /* no new mac addrs */ );
4812 /* Remove the entry from the list and delete the entry */
4813 *p = mc->next_index;
4814 pool_put (nm->mac_changes, mc);
4816 /* Remove from hash if we deleted the last entry */
4817 if (*p == ~0 && p == first)
4818 mhash_unset (&nm->mac_changes_by_address, address, 0);
4824 vnet_ip6_nd_term (vlib_main_t * vm,
4825 vlib_node_runtime_t * node,
4827 ethernet_header_t * eth,
4828 ip6_header_t * ip, u32 sw_if_index, u16 bd_index)
4830 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4831 icmp6_neighbor_solicitation_or_advertisement_header_t *ndh;
4833 ndh = ip6_next_header (ip);
4834 if (ndh->icmp.type != ICMP6_neighbor_solicitation &&
4835 ndh->icmp.type != ICMP6_neighbor_advertisement)
4838 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
4839 (p0->flags & VLIB_BUFFER_IS_TRACED)))
4841 u8 *t0 = vlib_add_trace (vm, node, p0,
4842 sizeof (icmp6_input_trace_t));
4843 clib_memcpy (t0, ip, sizeof (icmp6_input_trace_t));
4846 /* Check if anyone want ND events for L2 BDs */
4848 (nm->wc_ip6_nd_publisher_node != (uword) ~ 0
4849 && !ip6_address_is_link_local_unicast (&ip->src_address)))
4851 vnet_nd_wc_publish (sw_if_index, eth->src_address, &ip->src_address);
4854 /* Check if MAC entry exsist for solicited target IP */
4855 if (ndh->icmp.type == ICMP6_neighbor_solicitation)
4857 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *opt;
4858 l2_bridge_domain_t *bd_config;
4861 opt = (void *) (ndh + 1);
4862 if ((opt->header.type !=
4863 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address) ||
4864 (opt->header.n_data_u64s != 1))
4865 return 0; /* source link layer address option not present */
4867 bd_config = vec_elt_at_index (l2input_main.bd_configs, bd_index);
4869 (u8 *) hash_get_mem (bd_config->mac_by_ip6, &ndh->target_address);
4871 { /* found ip-mac entry, generate eighbor advertisement response */
4873 vlib_node_runtime_t *error_node =
4874 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
4875 ip->dst_address = ip->src_address;
4876 ip->src_address = ndh->target_address;
4877 ip->hop_limit = 255;
4879 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
4880 clib_memcpy (opt->ethernet_address, macp, 6);
4881 ndh->icmp.type = ICMP6_neighbor_advertisement;
4882 ndh->advertisement_flags = clib_host_to_net_u32
4883 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED |
4884 ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
4885 ndh->icmp.checksum = 0;
4886 ndh->icmp.checksum =
4887 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip, &bogus_length);
4888 clib_memcpy (eth->dst_address, eth->src_address, 6);
4889 clib_memcpy (eth->src_address, macp, 6);
4890 vlib_error_count (vm, error_node->node_index,
4891 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX, 1);
4901 ip6_neighbor_proxy_add_del (u32 sw_if_index, ip6_address_t * addr, u8 is_del)
4905 fib_prefix_t pfx = {
4907 .fp_proto = FIB_PROTOCOL_IP6,
4912 ip46_address_t nh = {
4916 fib_index = ip6_fib_table_get_index_for_sw_if_index (sw_if_index);
4918 if (~0 == fib_index)
4919 return VNET_API_ERROR_NO_SUCH_FIB;
4923 fib_table_entry_path_remove (fib_index,
4925 FIB_SOURCE_IP6_ND_PROXY,
4929 ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
4930 /* flush the ND cache of this address if it's there */
4931 vnet_unset_ip6_ethernet_neighbor (vlib_get_main (),
4932 sw_if_index, addr, NULL, 0);
4936 fib_table_entry_path_add (fib_index,
4938 FIB_SOURCE_IP6_ND_PROXY,
4939 FIB_ENTRY_FLAG_NONE,
4943 ~0, 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
4948 static clib_error_t *
4949 set_ip6_nd_proxy_cmd (vlib_main_t * vm,
4950 unformat_input_t * input, vlib_cli_command_t * cmd)
4952 vnet_main_t *vnm = vnet_get_main ();
4953 clib_error_t *error = 0;
4958 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4960 /* get the rest of the command */
4961 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
4963 if (unformat (input, "%U", unformat_ip6_address, &addr))
4965 else if (unformat (input, "delete") || unformat (input, "del"))
4968 return (unformat_parse_error (input));
4972 ip6_neighbor_proxy_add_del (sw_if_index, &addr, is_del);
4978 VLIB_CLI_COMMAND (set_ip6_nd_proxy_command, static) =
4980 .path = "set ip6 nd proxy",
4981 .short_help = "set ip6 nd proxy <HOST> <INTERFACE>",
4982 .function = set_ip6_nd_proxy_cmd,
4987 ethernet_ndp_change_mac (u32 sw_if_index)
4989 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4994 pool_foreach (n, nm->neighbor_pool,
4996 if (n->key.sw_if_index == sw_if_index)
4998 adj_nbr_walk_nh6 (sw_if_index,
4999 &n->key.ip6_address,
5000 ip6_nd_mk_complete_walk, n);
5005 ai = adj_glean_get (FIB_PROTOCOL_IP6, sw_if_index);
5007 if (ADJ_INDEX_INVALID != ai)
5008 adj_glean_update_rewrite (ai);
5012 send_ip6_na (vlib_main_t * vm, u32 sw_if_index)
5014 ip6_main_t *i6m = &ip6_main;
5015 ip6_address_t *ip6_addr = ip6_interface_first_address (i6m, sw_if_index);
5017 send_ip6_na_w_addr (vm, ip6_addr, sw_if_index);
5021 send_ip6_na_w_addr (vlib_main_t * vm,
5022 const ip6_address_t * ip6_addr, u32 sw_if_index)
5024 ip6_main_t *i6m = &ip6_main;
5025 vnet_main_t *vnm = vnet_get_main ();
5026 u8 *rewrite, rewrite_len;
5027 vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
5033 ("Sending unsolicitated NA IP6 address %U on sw_if_idex %d",
5034 format_ip6_address, ip6_addr, sw_if_index);
5036 /* Form unsolicited neighbor advertisement packet from NS pkt template */
5039 icmp6_neighbor_solicitation_header_t *h =
5040 vlib_packet_template_get_packet (vm,
5041 &i6m->discover_neighbor_packet_template,
5046 ip6_set_reserved_multicast_address (&h->ip.dst_address,
5047 IP6_MULTICAST_SCOPE_link_local,
5048 IP6_MULTICAST_GROUP_ID_all_hosts);
5049 h->ip.src_address = ip6_addr[0];
5050 h->neighbor.icmp.type = ICMP6_neighbor_advertisement;
5051 h->neighbor.target_address = ip6_addr[0];
5052 h->neighbor.advertisement_flags = clib_host_to_net_u32
5053 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
5054 h->link_layer_option.header.type =
5055 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
5056 clib_memcpy (h->link_layer_option.ethernet_address,
5057 hi->hw_address, vec_len (hi->hw_address));
5058 h->neighbor.icmp.checksum =
5059 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
5060 ASSERT (bogus_length == 0);
5062 /* Setup MAC header with IP6 Etype and mcast DMAC */
5063 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
5064 ip6_multicast_ethernet_address (dst_address,
5065 IP6_MULTICAST_GROUP_ID_all_hosts);
5067 ethernet_build_rewrite (vnm, sw_if_index, VNET_LINK_IP6, dst_address);
5068 rewrite_len = vec_len (rewrite);
5069 vlib_buffer_advance (b, -rewrite_len);
5070 ethernet_header_t *e = vlib_buffer_get_current (b);
5071 clib_memcpy (e->dst_address, rewrite, rewrite_len);
5074 /* Send unsolicited ND advertisement packet out the specified interface */
5075 vnet_buffer (b)->sw_if_index[VLIB_RX] =
5076 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
5077 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
5078 u32 *to_next = vlib_frame_vector_args (f);
5081 vlib_put_frame_to_node (vm, hi->output_node_index, f);
5086 * fd.io coding-style-patch-verification: ON
5089 * eval: (c-set-style "gnu")