2 * ip/ip6_neighbor.c: IP6 neighbor handling
4 * Copyright (c) 2010 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
18 #include <vnet/ip/ip.h>
19 #include <vnet/ip/ip6_neighbor.h>
20 #include <vnet/ethernet/ethernet.h>
21 #include <vppinfra/mhash.h>
22 #include <vnet/adj/adj.h>
23 #include <vnet/adj/adj_mcast.h>
24 #include <vnet/fib/fib_table.h>
25 #include <vnet/fib/ip6_fib.h>
26 #include <vnet/mfib/ip6_mfib.h>
27 #include <vnet/ip/ip6_ll_table.h>
31 * @brief IPv6 Neighbor Adjacency and Neighbor Discovery.
33 * The files contains the API and CLI code for managing IPv6 neighbor
34 * adjacency tables and neighbor discovery logic.
37 /* can't use sizeof link_layer_address, that's 8 */
38 #define ETHER_MAC_ADDR_LEN 6
40 /* advertised prefix option */
43 /* basic advertised information */
47 int adv_autonomous_flag;
48 u32 adv_valid_lifetime_in_secs;
49 u32 adv_pref_lifetime_in_secs;
51 /* advertised values are computed from these times if decrementing */
52 f64 valid_lifetime_expires;
53 f64 pref_lifetime_expires;
55 /* local information */
57 int deprecated_prefix_flag;
58 int decrement_lifetime_flag;
60 #define MIN_ADV_VALID_LIFETIME 7203 /* seconds */
61 #define DEF_ADV_VALID_LIFETIME 2592000
62 #define DEF_ADV_PREF_LIFETIME 604800
64 /* extensions are added here, mobile, DNS etc.. */
70 /* group information */
72 ip6_address_t mcast_address;
74 ip6_address_t *mcast_source_address_pool;
77 /* configured router advertisement information per ipv6 interface */
81 /* advertised config information, zero means unspecified */
85 u16 adv_router_lifetime_in_sec;
86 u32 adv_neighbor_reachable_time_in_msec;
87 u32 adv_time_in_msec_between_retransmitted_neighbor_solicitations;
92 /* source link layer option */
93 u8 link_layer_address[8];
94 u8 link_layer_addr_len;
97 ip6_radv_prefix_t *adv_prefixes_pool;
99 /* Hash table mapping address to index in interface advertised prefix pool. */
100 mhash_t address_to_prefix_index;
102 /* MLDP group information */
103 ip6_mldp_group_t *mldp_group_pool;
105 /* Hash table mapping address to index in mldp address pool. */
106 mhash_t address_to_mldp_index;
108 /* local information */
110 int send_radv; /* radv on/off on this interface - set by config */
111 int cease_radv; /* we are ceasing to send - set byf config */
113 int adv_link_layer_address;
115 int failed_device_check;
116 int all_routers_mcast;
120 adj_index_t mcast_adj_index;
122 /* timing information */
123 #define DEF_MAX_RADV_INTERVAL 200
124 #define DEF_MIN_RADV_INTERVAL .75 * DEF_MAX_RADV_INTERVAL
125 #define DEF_CURR_HOP_LIMIT 64
126 #define DEF_DEF_RTR_LIFETIME 3 * DEF_MAX_RADV_INTERVAL
127 #define MAX_DEF_RTR_LIFETIME 9000
129 #define MAX_INITIAL_RTR_ADVERT_INTERVAL 16 /* seconds */
130 #define MAX_INITIAL_RTR_ADVERTISEMENTS 3 /*transmissions */
131 #define MIN_DELAY_BETWEEN_RAS 3 /* seconds */
132 #define MAX_DELAY_BETWEEN_RAS 1800 /* seconds */
133 #define MAX_RA_DELAY_TIME .5 /* seconds */
135 f64 max_radv_interval;
136 f64 min_radv_interval;
137 f64 min_delay_between_radv;
138 f64 max_delay_between_radv;
139 f64 max_rtr_default_lifetime;
142 f64 last_multicast_time;
143 f64 next_multicast_time;
146 u32 initial_adverts_count;
147 f64 initial_adverts_interval;
148 u32 initial_adverts_sent;
151 u32 n_advertisements_sent;
152 u32 n_solicitations_rcvd;
153 u32 n_solicitations_dropped;
155 /* Link local address to use (defaults to underlying physical for logical interfaces */
156 ip6_address_t link_local_address;
158 /* router solicitations sending state */
159 u8 keep_sending_rs; /* when true then next fields are valid */
160 icmp6_send_router_solicitation_params_t params;
165 vlib_buffer_t *buffer;
174 /* Used for nd event notification only */
177 } pending_resolution_t;
182 /* Hash tables mapping name to opcode. */
183 uword *opcode_by_name;
185 /* lite beer "glean" adjacency handling */
186 mhash_t pending_resolutions_by_address;
187 pending_resolution_t *pending_resolutions;
189 /* Mac address change notification */
190 mhash_t mac_changes_by_address;
191 pending_resolution_t *mac_changes;
193 u32 *neighbor_input_next_index_by_hw_if_index;
195 ip6_neighbor_t *neighbor_pool;
197 mhash_t neighbor_index_by_key;
199 u32 *if_radv_pool_index_by_sw_if_index;
201 ip6_radv_t *if_radv_pool;
203 /* Neighbor attack mitigation */
204 u32 limit_neighbor_cache_size;
205 u32 neighbor_delete_rotor;
207 /* Wildcard nd report publisher */
208 uword wc_ip6_nd_publisher_node;
209 uword wc_ip6_nd_publisher_et;
211 /* Router advertisement report publisher */
212 uword ip6_ra_publisher_node;
213 uword ip6_ra_publisher_et;
214 } ip6_neighbor_main_t;
216 /* ipv6 neighbor discovery - timer/event types */
220 } ip6_icmp_neighbor_discovery_event_type_t;
230 } ip6_icmp_neighbor_discovery_event_data_t;
232 static ip6_neighbor_main_t ip6_neighbor_main;
233 ip6_neighbor_public_main_t ip6_neighbor_public_main;
234 static ip6_address_t ip6a_zero; /* ip6 address 0 */
236 static void wc_nd_signal_report (wc_nd_report_t * r);
237 static void ra_signal_report (ra_report_t * r);
240 ip6_neighbor_get_link_local_address (u32 sw_if_index)
242 static ip6_address_t empty_address = { {0} };
243 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
244 ip6_radv_t *radv_info;
247 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
250 clib_warning ("IPv6 is not enabled for sw_if_index %d", sw_if_index);
251 return empty_address;
253 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
254 if (radv_info == NULL)
256 clib_warning ("Internal error");
257 return empty_address;
259 return radv_info->link_local_address;
263 * @brief publish wildcard arp event
264 * @param sw_if_index The interface on which the ARP entires are acted
267 vnet_nd_wc_publish (u32 sw_if_index, u8 * mac, ip6_address_t * ip6)
270 .sw_if_index = sw_if_index,
273 memcpy (r.mac, mac, sizeof r.mac);
275 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
276 vl_api_rpc_call_main_thread (wc_nd_signal_report, (u8 *) & r, sizeof r);
281 wc_nd_signal_report (wc_nd_report_t * r)
283 vlib_main_t *vm = vlib_get_main ();
284 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
285 uword ni = nm->wc_ip6_nd_publisher_node;
286 uword et = nm->wc_ip6_nd_publisher_et;
288 if (ni == (uword) ~ 0)
291 vlib_process_signal_event_data (vm, ni, et, 1, sizeof *q);
297 wc_nd_set_publisher_node (uword node_index, uword event_type)
299 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
300 nm->wc_ip6_nd_publisher_node = node_index;
301 nm->wc_ip6_nd_publisher_et = event_type;
305 ra_publish (ra_report_t * r)
307 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
308 vl_api_rpc_call_main_thread (ra_signal_report, (u8 *) r, sizeof *r);
313 ra_signal_report (ra_report_t * r)
315 vlib_main_t *vm = vlib_get_main ();
316 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
317 uword ni = nm->ip6_ra_publisher_node;
318 uword et = nm->ip6_ra_publisher_et;
320 if (ni == (uword) ~ 0)
322 ra_report_t *q = vlib_process_signal_event_data (vm, ni, et, 1, sizeof *q);
328 ra_set_publisher_node (uword node_index, uword event_type)
330 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
331 nm->ip6_ra_publisher_node = node_index;
332 nm->ip6_ra_publisher_et = event_type;
336 format_ip6_neighbor_ip6_entry (u8 * s, va_list * va)
338 vlib_main_t *vm = va_arg (*va, vlib_main_t *);
339 ip6_neighbor_t *n = va_arg (*va, ip6_neighbor_t *);
340 vnet_main_t *vnm = vnet_get_main ();
341 vnet_sw_interface_t *si;
345 return format (s, "%=12s%=25s%=6s%=20s%=40s", "Time", "Address", "Flags",
346 "Link layer", "Interface");
348 if (n->flags & IP6_NEIGHBOR_FLAG_DYNAMIC)
349 flags = format (flags, "D");
351 if (n->flags & IP6_NEIGHBOR_FLAG_STATIC)
352 flags = format (flags, "S");
354 if (n->flags & IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY)
355 flags = format (flags, "N");
357 si = vnet_get_sw_interface (vnm, n->key.sw_if_index);
358 s = format (s, "%=12U%=25U%=6s%=20U%=40U",
359 format_vlib_time, vm, n->time_last_updated,
360 format_ip6_address, &n->key.ip6_address,
361 flags ? (char *) flags : "",
362 format_ethernet_address, n->link_layer_address,
363 format_vnet_sw_interface_name, vnm, si);
370 ip6_neighbor_adj_fib_remove (ip6_neighbor_t * n, u32 fib_index)
372 if (FIB_NODE_INDEX_INVALID != n->fib_entry_index)
374 if (ip6_address_is_link_local_unicast (&n->key.ip6_address))
376 ip6_ll_prefix_t pfx = {
377 .ilp_addr = n->key.ip6_address,
378 .ilp_sw_if_index = n->key.sw_if_index,
380 ip6_ll_table_entry_delete (&pfx);
386 .fp_proto = FIB_PROTOCOL_IP6,
387 .fp_addr.ip6 = n->key.ip6_address,
389 fib_table_entry_path_remove (fib_index,
394 n->key.sw_if_index, ~0,
395 1, FIB_ROUTE_PATH_FLAG_NONE);
405 u8 link_layer_address[6];
408 } ip6_neighbor_set_unset_rpc_args_t;
410 static void ip6_neighbor_set_unset_rpc_callback
411 (ip6_neighbor_set_unset_rpc_args_t * a);
413 static void set_unset_ip6_neighbor_rpc
416 ip6_address_t * a, u8 * link_layer_address, int is_add, int is_static,
419 ip6_neighbor_set_unset_rpc_args_t args;
420 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
422 args.sw_if_index = sw_if_index;
423 args.is_add = is_add;
424 args.is_static = is_static;
425 args.is_no_fib_entry = is_no_fib_entry;
426 clib_memcpy (&args.addr, a, sizeof (*a));
427 if (NULL != link_layer_address)
428 clib_memcpy (args.link_layer_address, link_layer_address, 6);
430 vl_api_rpc_call_main_thread (ip6_neighbor_set_unset_rpc_callback,
431 (u8 *) & args, sizeof (args));
435 ip6_nbr_probe (ip_adjacency_t * adj)
437 icmp6_neighbor_solicitation_header_t *h;
438 vnet_main_t *vnm = vnet_get_main ();
439 ip6_main_t *im = &ip6_main;
440 ip_interface_address_t *ia;
441 ip6_address_t *dst, *src;
442 vnet_hw_interface_t *hi;
443 vnet_sw_interface_t *si;
449 vm = vlib_get_main ();
451 si = vnet_get_sw_interface (vnm, adj->rewrite_header.sw_if_index);
452 dst = &adj->sub_type.nbr.next_hop.ip6;
454 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
458 src = ip6_interface_address_matching_destination (im, dst,
466 h = vlib_packet_template_get_packet (vm,
467 &im->discover_neighbor_packet_template,
470 hi = vnet_get_sup_hw_interface (vnm, adj->rewrite_header.sw_if_index);
472 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
473 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
474 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
475 h->ip.src_address = src[0];
476 h->neighbor.target_address = dst[0];
478 clib_memcpy (h->link_layer_option.ethernet_address,
479 hi->hw_address, vec_len (hi->hw_address));
481 h->neighbor.icmp.checksum =
482 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
483 ASSERT (bogus_length == 0);
485 b = vlib_get_buffer (vm, bi);
486 vnet_buffer (b)->sw_if_index[VLIB_RX] =
487 vnet_buffer (b)->sw_if_index[VLIB_TX] = adj->rewrite_header.sw_if_index;
489 /* Add encapsulation string for software interface (e.g. ethernet header). */
490 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
491 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
494 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
495 u32 *to_next = vlib_frame_vector_args (f);
498 vlib_put_frame_to_node (vm, hi->output_node_index, f);
503 ip6_nd_mk_complete (adj_index_t ai, ip6_neighbor_t * nbr)
505 adj_nbr_update_rewrite (ai, ADJ_NBR_REWRITE_FLAG_COMPLETE,
506 ethernet_build_rewrite (vnet_get_main (),
507 nbr->key.sw_if_index,
508 adj_get_link_type (ai),
509 nbr->link_layer_address));
513 ip6_nd_mk_incomplete (adj_index_t ai)
515 ip_adjacency_t *adj = adj_get (ai);
517 adj_nbr_update_rewrite (ai,
518 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
519 ethernet_build_rewrite (vnet_get_main (),
522 adj_get_link_type (ai),
523 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
526 #define IP6_NBR_MK_KEY(k, sw_if_index, addr) \
528 k.sw_if_index = sw_if_index; \
529 k.ip6_address = *addr; \
533 static ip6_neighbor_t *
534 ip6_nd_find (u32 sw_if_index, const ip6_address_t * addr)
536 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
537 ip6_neighbor_t *n = NULL;
538 ip6_neighbor_key_t k;
541 IP6_NBR_MK_KEY (k, sw_if_index, addr);
543 p = mhash_get (&nm->neighbor_index_by_key, &k);
546 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
553 ip6_nd_mk_complete_walk (adj_index_t ai, void *ctx)
555 ip6_neighbor_t *nbr = ctx;
557 ip6_nd_mk_complete (ai, nbr);
559 return (ADJ_WALK_RC_CONTINUE);
563 ip6_nd_mk_incomplete_walk (adj_index_t ai, void *ctx)
565 ip6_nd_mk_incomplete (ai);
567 return (ADJ_WALK_RC_CONTINUE);
570 static clib_error_t *
571 ip6_neighbor_sw_interface_up_down (vnet_main_t * vnm,
572 u32 sw_if_index, u32 flags)
574 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
576 u32 i, *to_delete = 0;
579 pool_foreach (n, nm->neighbor_pool,
581 if (n->key.sw_if_index == sw_if_index)
582 vec_add1 (to_delete, n - nm->neighbor_pool);
586 if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
588 for (i = 0; i < vec_len (to_delete); i++)
590 n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
591 adj_nbr_walk_nh6 (n->key.sw_if_index, &n->key.ip6_address,
592 ip6_nd_mk_complete_walk, n);
597 for (i = 0; i < vec_len (to_delete); i++)
599 n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
600 adj_nbr_walk_nh6 (n->key.sw_if_index, &n->key.ip6_address,
601 ip6_nd_mk_incomplete_walk, NULL);
602 if (n->flags & IP6_NEIGHBOR_FLAG_STATIC)
604 ip6_neighbor_adj_fib_remove (n,
605 ip6_fib_table_get_index_for_sw_if_index
606 (n->key.sw_if_index));
607 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
608 pool_put (nm->neighbor_pool, n);
612 vec_free (to_delete);
616 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_neighbor_sw_interface_up_down);
619 ip6_ethernet_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
626 nbr = ip6_nd_find (sw_if_index, &adj->sub_type.nbr.next_hop.ip6);
628 switch (adj->lookup_next_index)
630 case IP_LOOKUP_NEXT_GLEAN:
631 adj_glean_update_rewrite (ai);
633 case IP_LOOKUP_NEXT_ARP:
636 adj_nbr_walk_nh6 (sw_if_index, &nbr->key.ip6_address,
637 ip6_nd_mk_complete_walk, nbr);
642 * no matching ND entry.
643 * construct the rewrite required to for an ND packet, and stick
644 * that in the adj's pipe to smoke.
646 adj_nbr_update_rewrite (ai,
647 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
648 ethernet_build_rewrite (vnm,
651 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
654 * since the FIB has added this adj for a route, it makes sense it may
655 * want to forward traffic sometime soon. Let's send a speculative ND.
656 * just one. If we were to do periodically that wouldn't be bad either,
657 * but that's more code than i'm prepared to write at this time for
658 * relatively little reward.
663 case IP_LOOKUP_NEXT_MCAST:
666 * Construct a partial rewrite from the known ethernet mcast dest MAC
671 rewrite = ethernet_build_rewrite (vnm,
674 ethernet_ip6_mcast_dst_addr ());
677 * Complete the remaining fields of the adj's rewrite to direct the
678 * complete of the rewrite at switch time by copying in the IP
679 * dst address's bytes.
680 * Ofset is 2 bytes into the desintation address.
682 offset = vec_len (rewrite) - 2;
683 adj_mcast_update_rewrite (ai, rewrite, offset);
687 case IP_LOOKUP_NEXT_DROP:
688 case IP_LOOKUP_NEXT_PUNT:
689 case IP_LOOKUP_NEXT_LOCAL:
690 case IP_LOOKUP_NEXT_REWRITE:
691 case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
692 case IP_LOOKUP_NEXT_MIDCHAIN:
693 case IP_LOOKUP_NEXT_ICMP_ERROR:
694 case IP_LOOKUP_N_NEXT:
702 ip6_neighbor_adj_fib_add (ip6_neighbor_t * n, u32 fib_index)
704 if (ip6_address_is_link_local_unicast (&n->key.ip6_address))
706 ip6_ll_prefix_t pfx = {
707 .ilp_addr = n->key.ip6_address,
708 .ilp_sw_if_index = n->key.sw_if_index,
711 ip6_ll_table_entry_update (&pfx, FIB_ROUTE_PATH_FLAG_NONE);
717 .fp_proto = FIB_PROTOCOL_IP6,
718 .fp_addr.ip6 = n->key.ip6_address,
722 fib_table_entry_path_add (fib_index, &pfx, FIB_SOURCE_ADJ,
723 FIB_ENTRY_FLAG_ATTACHED,
724 DPO_PROTO_IP6, &pfx.fp_addr,
725 n->key.sw_if_index, ~0, 1, NULL,
726 FIB_ROUTE_PATH_FLAG_NONE);
730 static ip6_neighbor_t *
731 force_reuse_neighbor_entry (void)
734 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
736 u32 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
737 if (index == ~0) /* Try again from elt 0 */
738 index = pool_next_index (nm->neighbor_pool, index);
740 /* Find a non-static random entry to free up for reuse */
743 if ((count++ == 100) || (index == ~0))
744 return NULL; /* give up after 100 entries */
745 n = pool_elt_at_index (nm->neighbor_pool, index);
746 nm->neighbor_delete_rotor = index;
747 index = pool_next_index (nm->neighbor_pool, index);
749 while (n->flags & IP6_NEIGHBOR_FLAG_STATIC);
751 /* Remove ARP entry from its interface and update fib */
752 adj_nbr_walk_nh6 (n->key.sw_if_index,
753 &n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL);
754 ip6_neighbor_adj_fib_remove
755 (n, ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index));
756 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
762 vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
765 u8 * link_layer_address,
766 uword n_bytes_link_layer_address,
767 int is_static, int is_no_fib_entry)
769 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
770 ip6_neighbor_key_t k;
771 ip6_neighbor_t *n = 0;
772 int make_new_nd_cache_entry = 1;
775 pending_resolution_t *pr, *mc;
777 if (vlib_get_thread_index ())
779 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
780 1 /* set new neighbor */ , is_static,
785 k.sw_if_index = sw_if_index;
786 k.ip6_address = a[0];
789 p = mhash_get (&nm->neighbor_index_by_key, &k);
792 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
793 /* Refuse to over-write static neighbor entry. */
794 if (!is_static && (n->flags & IP6_NEIGHBOR_FLAG_STATIC))
796 make_new_nd_cache_entry = 0;
799 if (make_new_nd_cache_entry)
801 if (nm->limit_neighbor_cache_size &&
802 pool_elts (nm->neighbor_pool) >= nm->limit_neighbor_cache_size)
804 n = force_reuse_neighbor_entry ();
809 pool_get (nm->neighbor_pool, n);
811 mhash_set (&nm->neighbor_index_by_key, &k, n - nm->neighbor_pool,
814 n->fib_entry_index = FIB_NODE_INDEX_INVALID;
816 clib_memcpy (n->link_layer_address,
817 link_layer_address, n_bytes_link_layer_address);
820 * create the adj-fib. the entry in the FIB table for and to the peer.
822 if (!is_no_fib_entry)
824 ip6_neighbor_adj_fib_add
825 (n, ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index));
829 n->flags |= IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY;
835 * prevent a DoS attack from the data-plane that
836 * spams us with no-op updates to the MAC address
838 if (0 == memcmp (n->link_layer_address,
839 link_layer_address, n_bytes_link_layer_address))
841 n->time_last_updated = vlib_time_now (vm);
842 goto check_customers;
845 clib_memcpy (n->link_layer_address,
846 link_layer_address, n_bytes_link_layer_address);
849 /* Update time stamp and flags. */
850 n->time_last_updated = vlib_time_now (vm);
853 n->flags |= IP6_NEIGHBOR_FLAG_STATIC;
854 n->flags &= ~IP6_NEIGHBOR_FLAG_DYNAMIC;
858 n->flags |= IP6_NEIGHBOR_FLAG_DYNAMIC;
859 n->flags &= ~IP6_NEIGHBOR_FLAG_STATIC;
862 adj_nbr_walk_nh6 (sw_if_index,
863 &n->key.ip6_address, ip6_nd_mk_complete_walk, n);
866 /* Customer(s) waiting for this address to be resolved? */
867 p = mhash_get (&nm->pending_resolutions_by_address, a);
872 while (next_index != (u32) ~ 0)
874 pr = pool_elt_at_index (nm->pending_resolutions, next_index);
875 vlib_process_signal_event (vm, pr->node_index,
876 pr->type_opaque, pr->data);
877 next_index = pr->next_index;
878 pool_put (nm->pending_resolutions, pr);
881 mhash_unset (&nm->pending_resolutions_by_address, a, 0);
884 /* Customer(s) requesting ND event for this address? */
885 p = mhash_get (&nm->mac_changes_by_address, a);
890 while (next_index != (u32) ~ 0)
892 int (*fp) (u32, u8 *, u32, ip6_address_t *);
894 mc = pool_elt_at_index (nm->mac_changes, next_index);
895 fp = mc->data_callback;
897 /* Call the user's data callback, return 1 to suppress dup events */
900 (*fp) (mc->data, link_layer_address, sw_if_index, &ip6a_zero);
902 * Signal the resolver process, as long as the user
903 * says they want to be notified
906 vlib_process_signal_event (vm, mc->node_index,
907 mc->type_opaque, mc->data);
908 next_index = mc->next_index;
916 vnet_unset_ip6_ethernet_neighbor (vlib_main_t * vm,
919 u8 * link_layer_address,
920 uword n_bytes_link_layer_address)
922 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
923 ip6_neighbor_key_t k;
928 if (vlib_get_thread_index ())
930 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
931 0 /* unset */ , 0, 0);
935 k.sw_if_index = sw_if_index;
936 k.ip6_address = a[0];
939 p = mhash_get (&nm->neighbor_index_by_key, &k);
946 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
948 adj_nbr_walk_nh6 (sw_if_index,
949 &n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL);
950 ip6_neighbor_adj_fib_remove
951 (n, ip6_fib_table_get_index_for_sw_if_index (sw_if_index));
953 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
954 pool_put (nm->neighbor_pool, n);
960 static void ip6_neighbor_set_unset_rpc_callback
961 (ip6_neighbor_set_unset_rpc_args_t * a)
963 vlib_main_t *vm = vlib_get_main ();
965 vnet_set_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
966 a->link_layer_address, 6, a->is_static,
969 vnet_unset_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
970 a->link_layer_address, 6);
974 ip6_neighbor_sort (void *a1, void *a2)
976 vnet_main_t *vnm = vnet_get_main ();
977 ip6_neighbor_t *n1 = a1, *n2 = a2;
979 cmp = vnet_sw_interface_compare (vnm, n1->key.sw_if_index,
980 n2->key.sw_if_index);
982 cmp = ip6_address_compare (&n1->key.ip6_address, &n2->key.ip6_address);
987 ip6_neighbors_pool (void)
989 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
990 return nm->neighbor_pool;
994 ip6_neighbors_entries (u32 sw_if_index)
996 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
997 ip6_neighbor_t *n, *ns = 0;
1000 pool_foreach (n, nm->neighbor_pool,
1002 if (sw_if_index != ~0 && n->key.sw_if_index != sw_if_index)
1004 vec_add1 (ns, n[0]);
1009 vec_sort_with_function (ns, ip6_neighbor_sort);
1013 static clib_error_t *
1014 show_ip6_neighbors (vlib_main_t * vm,
1015 unformat_input_t * input, vlib_cli_command_t * cmd)
1017 vnet_main_t *vnm = vnet_get_main ();
1018 ip6_neighbor_t *n, *ns;
1019 clib_error_t *error = 0;
1022 /* Filter entries by interface if given. */
1024 (void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index);
1026 ns = ip6_neighbors_entries (sw_if_index);
1029 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, 0);
1032 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, n);
1041 * This command is used to display the adjacent IPv6 hosts found via
1042 * neighbor discovery. Optionally, limit the output to the specified
1046 * Example of how to display the IPv6 neighbor adjacency table:
1047 * @cliexstart{show ip6 neighbors}
1048 * Time Address Flags Link layer Interface
1049 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
1050 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
1051 * 886.6654 ::1:1:c:0:9 S 02:fe:e4:45:27:5b GigabitEthernet3/0/0
1053 * Example of how to display the IPv6 neighbor adjacency table for given interface:
1054 * @cliexstart{show ip6 neighbors GigabitEthernet2/0/0}
1055 * Time Address Flags Link layer Interface
1056 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
1057 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
1061 VLIB_CLI_COMMAND (show_ip6_neighbors_command, static) = {
1062 .path = "show ip6 neighbors",
1063 .function = show_ip6_neighbors,
1064 .short_help = "show ip6 neighbors [<interface>]",
1068 static clib_error_t *
1069 set_ip6_neighbor (vlib_main_t * vm,
1070 unformat_input_t * input, vlib_cli_command_t * cmd)
1072 vnet_main_t *vnm = vnet_get_main ();
1078 int is_no_fib_entry = 0;
1081 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1083 /* intfc, ip6-address, mac-address */
1084 if (unformat (input, "%U %U %U",
1085 unformat_vnet_sw_interface, vnm, &sw_if_index,
1086 unformat_ip6_address, &addr,
1087 unformat_ethernet_address, mac_address))
1090 else if (unformat (input, "delete") || unformat (input, "del"))
1092 else if (unformat (input, "static"))
1094 else if (unformat (input, "no-fib-entry"))
1095 is_no_fib_entry = 1;
1101 return clib_error_return (0, "Missing interface, ip6 or hw address");
1104 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
1105 mac_address, sizeof (mac_address),
1106 is_static, is_no_fib_entry);
1108 vnet_unset_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
1109 mac_address, sizeof (mac_address));
1114 * This command is used to manually add an entry to the IPv6 neighbor
1115 * adjacency table. Optionally, the entry can be added as static. It is
1116 * also used to remove an entry from the table. Use the '<em>show ip6
1117 * neighbors</em>' command to display all learned and manually entered entries.
1120 * Example of how to add a static entry to the IPv6 neighbor adjacency table:
1121 * @cliexcmd{set ip6 neighbor GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b static}
1122 * Example of how to delete an entry from the IPv6 neighbor adjacency table:
1123 * @cliexcmd{set ip6 neighbor del GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b}
1126 VLIB_CLI_COMMAND (set_ip6_neighbor_command, static) =
1128 .path = "set ip6 neighbor",
1129 .function = set_ip6_neighbor,
1130 .short_help = "set ip6 neighbor [del] <interface> <ip6-address> <mac-address> [static]",
1136 ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP,
1137 ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY,
1138 ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
1139 } icmp6_neighbor_solicitation_or_advertisement_next_t;
1141 static_always_inline uword
1142 icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
1143 vlib_node_runtime_t * node,
1144 vlib_frame_t * frame,
1145 uword is_solicitation)
1147 vnet_main_t *vnm = vnet_get_main ();
1148 ip6_main_t *im = &ip6_main;
1149 uword n_packets = frame->n_vectors;
1150 u32 *from, *to_next;
1151 u32 n_left_from, n_left_to_next, next_index, n_advertisements_sent;
1152 icmp6_neighbor_discovery_option_type_t option_type;
1153 vlib_node_runtime_t *error_node =
1154 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1157 from = vlib_frame_vector_args (frame);
1158 n_left_from = n_packets;
1159 next_index = node->cached_next_index;
1161 if (node->flags & VLIB_NODE_FLAG_TRACE)
1162 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1164 sizeof (icmp6_input_trace_t));
1168 ? ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address
1169 : ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address);
1170 n_advertisements_sent = 0;
1172 while (n_left_from > 0)
1174 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1176 while (n_left_from > 0 && n_left_to_next > 0)
1180 icmp6_neighbor_solicitation_or_advertisement_header_t *h0;
1181 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1182 u32 bi0, options_len0, sw_if_index0, next0, error0;
1183 u32 ip6_sadd_link_local, ip6_sadd_unspecified;
1187 bi0 = to_next[0] = from[0];
1192 n_left_to_next -= 1;
1194 p0 = vlib_get_buffer (vm, bi0);
1195 ip0 = vlib_buffer_get_current (p0);
1196 h0 = ip6_next_header (ip0);
1198 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1200 error0 = ICMP6_ERROR_NONE;
1201 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1202 ip6_sadd_link_local =
1203 ip6_address_is_link_local_unicast (&ip0->src_address);
1204 ip6_sadd_unspecified =
1205 ip6_address_is_unspecified (&ip0->src_address);
1207 /* Check that source address is unspecified, link-local or else on-link. */
1208 if (!ip6_sadd_unspecified && !ip6_sadd_link_local)
1210 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1212 if (ADJ_INDEX_INVALID != src_adj_index0)
1214 ip_adjacency_t *adj0 = adj_get (src_adj_index0);
1216 /* Allow all realistic-looking rewrite adjacencies to pass */
1217 ni0 = adj0->lookup_next_index;
1218 is_rewrite0 = (ni0 >= IP_LOOKUP_NEXT_ARP) &&
1219 (ni0 < IP6_LOOKUP_N_NEXT);
1221 error0 = ((adj0->rewrite_header.sw_if_index != sw_if_index0
1224 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK
1230 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK;
1234 o0 = (void *) (h0 + 1);
1235 o0 = ((options_len0 == 8 && o0->header.type == option_type
1236 && o0->header.n_data_u64s == 1) ? o0 : 0);
1238 /* If src address unspecified or link local, donot learn neighbor MAC */
1239 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1240 !ip6_sadd_unspecified))
1242 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1245 &h0->target_address,
1246 o0->ethernet_address,
1247 sizeof (o0->ethernet_address),
1251 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1253 /* Check that target address is local to this router. */
1254 fib_node_index_t fei;
1258 ip6_fib_table_get_index_for_sw_if_index (sw_if_index0);
1260 if (~0 == fib_index)
1262 error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1266 if (ip6_address_is_link_local_unicast (&h0->target_address))
1268 fei = ip6_fib_table_lookup_exact_match
1269 (ip6_ll_fib_get (sw_if_index0),
1270 &h0->target_address, 128);
1274 fei = ip6_fib_table_lookup_exact_match (fib_index,
1275 &h0->target_address,
1279 if (FIB_NODE_INDEX_INVALID == fei)
1281 /* The target address is not in the FIB */
1283 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1287 if (FIB_ENTRY_FLAG_LOCAL &
1288 fib_entry_get_flags_for_source (fei,
1289 FIB_SOURCE_INTERFACE))
1291 /* It's an address that belongs to one of our interfaces
1295 if (fib_entry_is_sourced
1296 (fei, FIB_SOURCE_IP6_ND_PROXY) ||
1297 fib_entry_is_sourced (fei, FIB_SOURCE_IP6_ND))
1299 /* The address was added by IPv6 Proxy ND config.
1300 * We should only respond to these if the NS arrived on
1301 * the link that has a matching covering prefix */
1306 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1312 if (is_solicitation)
1313 next0 = (error0 != ICMP6_ERROR_NONE
1314 ? ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP
1315 : ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY);
1319 error0 = error0 == ICMP6_ERROR_NONE ?
1320 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_RX : error0;
1323 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1325 vnet_sw_interface_t *sw_if0;
1326 ethernet_interface_t *eth_if0;
1327 ethernet_header_t *eth0;
1329 /* dst address is either source address or the all-nodes mcast addr */
1330 if (!ip6_sadd_unspecified)
1331 ip0->dst_address = ip0->src_address;
1333 ip6_set_reserved_multicast_address (&ip0->dst_address,
1334 IP6_MULTICAST_SCOPE_link_local,
1335 IP6_MULTICAST_GROUP_ID_all_hosts);
1337 ip0->src_address = h0->target_address;
1338 ip0->hop_limit = 255;
1339 h0->icmp.type = ICMP6_neighbor_advertisement;
1341 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1342 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1344 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1347 clib_memcpy (o0->ethernet_address, eth_if0->address, 6);
1349 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
1352 h0->advertisement_flags = clib_host_to_net_u32
1353 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED
1354 | ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
1356 h0->icmp.checksum = 0;
1358 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1360 ASSERT (bogus_length == 0);
1362 /* Reuse current MAC header, copy SMAC to DMAC and
1363 * interface MAC to SMAC */
1364 vlib_buffer_advance (p0, -ethernet_buffer_header_size (p0));
1365 eth0 = vlib_buffer_get_current (p0);
1366 clib_memcpy (eth0->dst_address, eth0->src_address, 6);
1368 clib_memcpy (eth0->src_address, eth_if0->address, 6);
1370 /* Setup input and output sw_if_index for packet */
1371 ASSERT (vnet_buffer (p0)->sw_if_index[VLIB_RX] == sw_if_index0);
1372 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1373 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1374 vnet_main.local_interface_sw_if_index;
1376 n_advertisements_sent++;
1379 p0->error = error_node->errors[error0];
1381 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1382 to_next, n_left_to_next,
1386 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1389 /* Account for advertisements sent. */
1390 vlib_error_count (vm, error_node->node_index,
1391 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX,
1392 n_advertisements_sent);
1394 return frame->n_vectors;
1397 /* for "syslogging" - use elog for now */
1398 #define foreach_log_level \
1399 _ (DEBUG, "DEBUG") \
1400 _ (INFO, "INFORMATION") \
1401 _ (NOTICE, "NOTICE") \
1402 _ (WARNING, "WARNING") \
1404 _ (CRIT, "CRITICAL") \
1405 _ (ALERT, "ALERT") \
1406 _ (EMERG, "EMERGENCY")
1410 #define _(f,s) LOG_##f,
1415 static char *log_level_strings[] = {
1421 static int logmask = 1 << LOG_DEBUG;
1424 ip6_neighbor_syslog (vlib_main_t * vm, int priority, char *fmt, ...)
1426 /* just use elog for now */
1430 if ((priority > LOG_EMERG) || !(logmask & (1 << priority)))
1436 what = va_format (0, fmt, &va);
1438 ELOG_TYPE_DECLARE (e) =
1440 .format = "ip6 nd: (%s): %s",.format_args = "T4T4",};
1445 ed = ELOG_DATA (&vm->elog_main, e);
1446 ed->s[0] = elog_string (&vm->elog_main, log_level_strings[priority]);
1447 ed->s[1] = elog_string (&vm->elog_main, (char *) what);
1454 call_ip6_neighbor_callbacks (void *data,
1455 _vnet_ip6_neighbor_function_list_elt_t * elt)
1457 clib_error_t *error = 0;
1461 error = elt->fp (data);
1464 elt = elt->next_ip6_neighbor_function;
1470 /* ipv6 neighbor discovery - router advertisements */
1473 ICMP6_ROUTER_SOLICITATION_NEXT_DROP,
1474 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW,
1475 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX,
1476 ICMP6_ROUTER_SOLICITATION_N_NEXT,
1477 } icmp6_router_solicitation_or_advertisement_next_t;
1479 static_always_inline uword
1480 icmp6_router_solicitation (vlib_main_t * vm,
1481 vlib_node_runtime_t * node, vlib_frame_t * frame)
1483 vnet_main_t *vnm = vnet_get_main ();
1484 ip6_main_t *im = &ip6_main;
1485 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1486 uword n_packets = frame->n_vectors;
1487 u32 *from, *to_next;
1488 u32 n_left_from, n_left_to_next, next_index;
1489 u32 n_advertisements_sent = 0;
1492 icmp6_neighbor_discovery_option_type_t option_type;
1494 vlib_node_runtime_t *error_node =
1495 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1497 from = vlib_frame_vector_args (frame);
1498 n_left_from = n_packets;
1499 next_index = node->cached_next_index;
1501 if (node->flags & VLIB_NODE_FLAG_TRACE)
1502 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1504 sizeof (icmp6_input_trace_t));
1506 /* source may append his LL address */
1507 option_type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1509 while (n_left_from > 0)
1511 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1513 while (n_left_from > 0 && n_left_to_next > 0)
1517 ip6_radv_t *radv_info = 0;
1519 icmp6_neighbor_discovery_header_t *h0;
1520 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1522 u32 bi0, options_len0, sw_if_index0, next0, error0;
1523 u32 is_solicitation = 1, is_dropped = 0;
1524 u32 is_unspecified, is_link_local;
1526 bi0 = to_next[0] = from[0];
1531 n_left_to_next -= 1;
1533 p0 = vlib_get_buffer (vm, bi0);
1534 ip0 = vlib_buffer_get_current (p0);
1535 h0 = ip6_next_header (ip0);
1537 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1538 is_unspecified = ip6_address_is_unspecified (&ip0->src_address);
1540 ip6_address_is_link_local_unicast (&ip0->src_address);
1542 error0 = ICMP6_ERROR_NONE;
1543 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1545 /* check if solicitation (not from nd_timer node) */
1546 if (ip6_address_is_unspecified (&ip0->dst_address))
1547 is_solicitation = 0;
1549 /* Check that source address is unspecified, link-local or else on-link. */
1550 if (!is_unspecified && !is_link_local)
1552 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1554 if (ADJ_INDEX_INVALID != src_adj_index0)
1556 ip_adjacency_t *adj0 = adj_get (src_adj_index0);
1558 error0 = (adj0->rewrite_header.sw_if_index != sw_if_index0
1560 ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK
1565 error0 = ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK;
1569 /* check for source LL option and process */
1570 o0 = (void *) (h0 + 1);
1571 o0 = ((options_len0 == 8
1572 && o0->header.type == option_type
1573 && o0->header.n_data_u64s == 1) ? o0 : 0);
1575 /* if src address unspecified IGNORE any options */
1576 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1577 !is_unspecified && !is_link_local))
1579 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1581 o0->ethernet_address,
1582 sizeof (o0->ethernet_address),
1586 /* default is to drop */
1587 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1589 if (error0 == ICMP6_ERROR_NONE)
1591 vnet_sw_interface_t *sw_if0;
1592 ethernet_interface_t *eth_if0;
1595 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1596 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1598 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1600 /* only support ethernet interface type for now */
1602 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1605 if (error0 == ICMP6_ERROR_NONE)
1609 /* adjust the sizeof the buffer to just include the ipv6 header */
1610 p0->current_length -=
1612 sizeof (icmp6_neighbor_discovery_header_t));
1614 /* look up the radv_t information for this interface */
1615 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) >
1619 nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1622 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1627 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1630 if (error0 == ICMP6_ERROR_NONE)
1632 f64 now = vlib_time_now (vm);
1634 /* for solicited adverts - need to rate limit */
1635 if (is_solicitation)
1637 if (0 != radv_info->last_radv_time &&
1638 (now - radv_info->last_radv_time) <
1639 MIN_DELAY_BETWEEN_RAS)
1642 radv_info->last_radv_time = now;
1646 icmp6_router_advertisement_header_t rh;
1648 rh.icmp.type = ICMP6_router_advertisement;
1650 rh.icmp.checksum = 0;
1652 rh.current_hop_limit = radv_info->curr_hop_limit;
1653 rh.router_lifetime_in_sec =
1654 clib_host_to_net_u16
1655 (radv_info->adv_router_lifetime_in_sec);
1657 time_in_msec_between_retransmitted_neighbor_solicitations
1659 clib_host_to_net_u32 (radv_info->
1660 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
1661 rh.neighbor_reachable_time_in_msec =
1662 clib_host_to_net_u32 (radv_info->
1663 adv_neighbor_reachable_time_in_msec);
1666 (radv_info->adv_managed_flag) ?
1667 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP :
1670 ((radv_info->adv_other_flag) ?
1671 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP :
1675 u16 payload_length =
1676 sizeof (icmp6_router_advertisement_header_t);
1678 vlib_buffer_add_data (vm,
1679 vlib_buffer_get_free_list_index
1680 (p0), bi0, (void *) &rh,
1682 (icmp6_router_advertisement_header_t));
1684 if (radv_info->adv_link_layer_address)
1686 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
1690 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1691 h.header.n_data_u64s = 1;
1693 /* copy ll address */
1694 clib_memcpy (&h.ethernet_address[0],
1695 eth_if0->address, 6);
1697 vlib_buffer_add_data (vm,
1698 vlib_buffer_get_free_list_index
1699 (p0), bi0, (void *) &h,
1701 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t));
1705 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t);
1708 /* add MTU option */
1709 if (radv_info->adv_link_mtu)
1711 icmp6_neighbor_discovery_mtu_option_t h;
1715 clib_host_to_net_u32 (radv_info->adv_link_mtu);
1716 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu;
1717 h.header.n_data_u64s = 1;
1720 sizeof (icmp6_neighbor_discovery_mtu_option_t);
1722 vlib_buffer_add_data (vm,
1723 vlib_buffer_get_free_list_index
1724 (p0), bi0, (void *) &h,
1726 (icmp6_neighbor_discovery_mtu_option_t));
1729 /* add advertised prefix options */
1730 ip6_radv_prefix_t *pr_info;
1733 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
1735 if(pr_info->enabled &&
1736 (!pr_info->decrement_lifetime_flag
1737 || (pr_info->pref_lifetime_expires >0)))
1739 /* advertise this prefix */
1740 icmp6_neighbor_discovery_prefix_information_option_t h;
1742 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information;
1743 h.header.n_data_u64s = (sizeof(icmp6_neighbor_discovery_prefix_information_option_t) >> 3);
1745 h.dst_address_length = pr_info->prefix_len;
1747 h.flags = (pr_info->adv_on_link_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_FLAG_ON_LINK : 0;
1748 h.flags |= (pr_info->adv_autonomous_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_AUTO : 0;
1750 if(radv_info->cease_radv && pr_info->deprecated_prefix_flag)
1752 h.valid_time = clib_host_to_net_u32(MIN_ADV_VALID_LIFETIME);
1753 h.preferred_time = 0;
1757 if(pr_info->decrement_lifetime_flag)
1759 pr_info->adv_valid_lifetime_in_secs = ((pr_info->valid_lifetime_expires > now)) ?
1760 (pr_info->valid_lifetime_expires - now) : 0;
1762 pr_info->adv_pref_lifetime_in_secs = ((pr_info->pref_lifetime_expires > now)) ?
1763 (pr_info->pref_lifetime_expires - now) : 0;
1766 h.valid_time = clib_host_to_net_u32(pr_info->adv_valid_lifetime_in_secs);
1767 h.preferred_time = clib_host_to_net_u32(pr_info->adv_pref_lifetime_in_secs) ;
1771 clib_memcpy(&h.dst_address, &pr_info->prefix, sizeof(ip6_address_t));
1773 payload_length += sizeof( icmp6_neighbor_discovery_prefix_information_option_t);
1775 vlib_buffer_add_data (vm,
1776 vlib_buffer_get_free_list_index (p0),
1778 (void *)&h, sizeof(icmp6_neighbor_discovery_prefix_information_option_t));
1784 /* add additional options before here */
1786 /* finish building the router advertisement... */
1787 if (!is_unspecified && radv_info->send_unicast)
1789 ip0->dst_address = ip0->src_address;
1793 /* target address is all-nodes mcast addr */
1794 ip6_set_reserved_multicast_address
1796 IP6_MULTICAST_SCOPE_link_local,
1797 IP6_MULTICAST_GROUP_ID_all_hosts);
1800 /* source address MUST be the link-local address */
1801 ip0->src_address = radv_info->link_local_address;
1803 ip0->hop_limit = 255;
1804 ip0->payload_length =
1805 clib_host_to_net_u16 (payload_length);
1807 icmp6_router_advertisement_header_t *rh0 =
1808 (icmp6_router_advertisement_header_t *) (ip0 + 1);
1809 rh0->icmp.checksum =
1810 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1812 ASSERT (bogus_length == 0);
1814 /* setup output if and adjacency */
1815 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1816 vnet_main.local_interface_sw_if_index;
1818 if (is_solicitation)
1820 ethernet_header_t *eth0;
1821 /* Reuse current MAC header, copy SMAC to DMAC and
1822 * interface MAC to SMAC */
1823 vlib_buffer_reset (p0);
1824 eth0 = vlib_buffer_get_current (p0);
1825 clib_memcpy (eth0->dst_address, eth0->src_address,
1827 clib_memcpy (eth0->src_address, eth_if0->address,
1830 is_dropped ? next0 :
1831 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX;
1832 vnet_buffer (p0)->sw_if_index[VLIB_TX] =
1837 adj_index0 = radv_info->mcast_adj_index;
1838 if (adj_index0 == 0)
1839 error0 = ICMP6_ERROR_DST_LOOKUP_MISS;
1843 is_dropped ? next0 :
1844 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW;
1845 vnet_buffer (p0)->ip.adj_index[VLIB_TX] =
1849 p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
1851 radv_info->n_solicitations_dropped += is_dropped;
1852 radv_info->n_solicitations_rcvd += is_solicitation;
1854 if ((error0 == ICMP6_ERROR_NONE) && !is_dropped)
1856 radv_info->n_advertisements_sent++;
1857 n_advertisements_sent++;
1863 p0->error = error_node->errors[error0];
1865 if (error0 != ICMP6_ERROR_NONE)
1866 vlib_error_count (vm, error_node->node_index, error0, 1);
1868 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1869 to_next, n_left_to_next,
1874 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1877 /* Account for router advertisements sent. */
1878 vlib_error_count (vm, error_node->node_index,
1879 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_TX,
1880 n_advertisements_sent);
1882 return frame->n_vectors;
1885 /* validate advertised info for consistancy (see RFC-4861 section 6.2.7) - log any inconsistencies, packet will always be dropped */
1886 static_always_inline uword
1887 icmp6_router_advertisement (vlib_main_t * vm,
1888 vlib_node_runtime_t * node, vlib_frame_t * frame)
1890 vnet_main_t *vnm = vnet_get_main ();
1891 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1892 uword n_packets = frame->n_vectors;
1893 u32 *from, *to_next;
1894 u32 n_left_from, n_left_to_next, next_index;
1895 u32 n_advertisements_rcvd = 0;
1897 vlib_node_runtime_t *error_node =
1898 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1900 from = vlib_frame_vector_args (frame);
1901 n_left_from = n_packets;
1902 next_index = node->cached_next_index;
1904 if (node->flags & VLIB_NODE_FLAG_TRACE)
1905 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1907 sizeof (icmp6_input_trace_t));
1909 while (n_left_from > 0)
1911 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1913 while (n_left_from > 0 && n_left_to_next > 0)
1917 ip6_radv_t *radv_info = 0;
1918 icmp6_router_advertisement_header_t *h0;
1919 u32 bi0, options_len0, sw_if_index0, next0, error0;
1921 bi0 = to_next[0] = from[0];
1926 n_left_to_next -= 1;
1928 p0 = vlib_get_buffer (vm, bi0);
1929 ip0 = vlib_buffer_get_current (p0);
1930 h0 = ip6_next_header (ip0);
1932 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1934 error0 = ICMP6_ERROR_NONE;
1935 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1937 /* Check that source address is link-local */
1938 error0 = (!ip6_address_is_link_local_unicast (&ip0->src_address)) ?
1939 ICMP6_ERROR_ROUTER_ADVERTISEMENT_SOURCE_NOT_LINK_LOCAL : error0;
1941 /* default is to drop */
1942 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1944 n_advertisements_rcvd++;
1946 if (error0 == ICMP6_ERROR_NONE)
1948 vnet_sw_interface_t *sw_if0;
1949 ethernet_interface_t *eth_if0;
1951 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1952 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1954 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1956 /* only support ethernet interface type for now */
1958 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1961 if (error0 == ICMP6_ERROR_NONE)
1965 /* look up the radv_t information for this interface */
1966 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) >
1970 nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1973 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1978 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1981 if (error0 == ICMP6_ERROR_NONE)
1983 radv_info->keep_sending_rs = 0;
1987 r.sw_if_index = sw_if_index0;
1988 memcpy (r.router_address, &ip0->src_address, 16);
1989 r.current_hop_limit = h0->current_hop_limit;
1990 r.flags = h0->flags;
1991 r.router_lifetime_in_sec =
1992 clib_net_to_host_u16 (h0->router_lifetime_in_sec);
1993 r.neighbor_reachable_time_in_msec =
1994 clib_net_to_host_u32
1995 (h0->neighbor_reachable_time_in_msec);
1996 r.time_in_msec_between_retransmitted_neighbor_solicitations = clib_net_to_host_u32 (h0->time_in_msec_between_retransmitted_neighbor_solicitations);
1999 /* validate advertised information */
2000 if ((h0->current_hop_limit && radv_info->curr_hop_limit)
2001 && (h0->current_hop_limit !=
2002 radv_info->curr_hop_limit))
2004 ip6_neighbor_syslog (vm, LOG_WARNING,
2005 "our AdvCurHopLimit on %U doesn't agree with %U",
2006 format_vnet_sw_if_index_name,
2013 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP)
2014 != radv_info->adv_managed_flag)
2016 ip6_neighbor_syslog (vm, LOG_WARNING,
2017 "our AdvManagedFlag on %U doesn't agree with %U",
2018 format_vnet_sw_if_index_name,
2025 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP)
2026 != radv_info->adv_other_flag)
2028 ip6_neighbor_syslog (vm, LOG_WARNING,
2029 "our AdvOtherConfigFlag on %U doesn't agree with %U",
2030 format_vnet_sw_if_index_name,
2037 time_in_msec_between_retransmitted_neighbor_solicitations
2039 adv_time_in_msec_between_retransmitted_neighbor_solicitations)
2041 time_in_msec_between_retransmitted_neighbor_solicitations
2043 clib_host_to_net_u32 (radv_info->
2044 adv_time_in_msec_between_retransmitted_neighbor_solicitations)))
2046 ip6_neighbor_syslog (vm, LOG_WARNING,
2047 "our AdvRetransTimer on %U doesn't agree with %U",
2048 format_vnet_sw_if_index_name,
2054 if ((h0->neighbor_reachable_time_in_msec &&
2055 radv_info->adv_neighbor_reachable_time_in_msec) &&
2056 (h0->neighbor_reachable_time_in_msec !=
2057 clib_host_to_net_u32
2058 (radv_info->adv_neighbor_reachable_time_in_msec)))
2060 ip6_neighbor_syslog (vm, LOG_WARNING,
2061 "our AdvReachableTime on %U doesn't agree with %U",
2062 format_vnet_sw_if_index_name,
2068 /* check for MTU or prefix options or .. */
2069 u8 *opt_hdr = (u8 *) (h0 + 1);
2070 while (options_len0 > 0)
2072 icmp6_neighbor_discovery_option_header_t *o0 =
2073 (icmp6_neighbor_discovery_option_header_t *)
2075 int opt_len = o0->n_data_u64s << 3;
2076 icmp6_neighbor_discovery_option_type_t option_type =
2079 if (options_len0 < 2)
2081 ip6_neighbor_syslog (vm, LOG_ERR,
2082 "malformed RA packet on %U from %U",
2083 format_vnet_sw_if_index_name,
2092 ip6_neighbor_syslog (vm, LOG_ERR,
2093 " zero length option in RA on %U from %U",
2094 format_vnet_sw_if_index_name,
2100 else if (opt_len > options_len0)
2102 ip6_neighbor_syslog (vm, LOG_ERR,
2103 "option length in RA packet greater than total length on %U from %U",
2104 format_vnet_sw_if_index_name,
2111 options_len0 -= opt_len;
2114 switch (option_type)
2116 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address:
2118 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
2120 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
2123 if (opt_len < sizeof (*h))
2126 memcpy (r.slla, h->ethernet_address, 6);
2130 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu:
2132 icmp6_neighbor_discovery_mtu_option_t *h =
2133 (icmp6_neighbor_discovery_mtu_option_t
2136 if (opt_len < sizeof (*h))
2139 r.mtu = clib_net_to_host_u32 (h->mtu);
2141 if ((h->mtu && radv_info->adv_link_mtu) &&
2143 clib_host_to_net_u32
2144 (radv_info->adv_link_mtu)))
2146 ip6_neighbor_syslog (vm, LOG_WARNING,
2147 "our AdvLinkMTU on %U doesn't agree with %U",
2148 format_vnet_sw_if_index_name,
2156 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information:
2158 icmp6_neighbor_discovery_prefix_information_option_t
2160 (icmp6_neighbor_discovery_prefix_information_option_t
2163 /* validate advertised prefix options */
2164 ip6_radv_prefix_t *pr_info;
2165 u32 preferred, valid;
2167 if (opt_len < sizeof (*h))
2170 vec_validate (r.prefixes,
2171 vec_len (r.prefixes));
2172 ra_report_prefix_info_t *prefix =
2173 vec_elt_at_index (r.prefixes,
2174 vec_len (r.prefixes) - 1);
2177 clib_net_to_host_u32 (h->preferred_time);
2178 valid = clib_net_to_host_u32 (h->valid_time);
2180 prefix->preferred_time = preferred;
2181 prefix->valid_time = valid;
2182 prefix->flags = h->flags & 0xc0;
2183 prefix->dst_address_length =
2184 h->dst_address_length;
2185 prefix->dst_address = h->dst_address;
2187 /* look for matching prefix - if we our advertising it, it better be consistant */
2189 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
2193 ip6_address_mask_from_width(&mask, pr_info->prefix_len);
2195 if(pr_info->enabled &&
2196 (pr_info->prefix_len == h->dst_address_length) &&
2197 ip6_address_is_equal_masked (&pr_info->prefix, &h->dst_address, &mask))
2200 if(!pr_info->decrement_lifetime_flag &&
2201 valid != pr_info->adv_valid_lifetime_in_secs)
2203 ip6_neighbor_syslog(vm, LOG_WARNING,
2204 "our ADV validlifetime on %U for %U does not agree with %U",
2205 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
2206 format_ip6_address, &h->dst_address);
2208 if(!pr_info->decrement_lifetime_flag &&
2209 preferred != pr_info->adv_pref_lifetime_in_secs)
2211 ip6_neighbor_syslog(vm, LOG_WARNING,
2212 "our ADV preferredlifetime on %U for %U does not agree with %U",
2213 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
2214 format_ip6_address, &h->dst_address);
2232 p0->error = error_node->errors[error0];
2234 if (error0 != ICMP6_ERROR_NONE)
2235 vlib_error_count (vm, error_node->node_index, error0, 1);
2237 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2238 to_next, n_left_to_next,
2242 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2245 /* Account for router advertisements received. */
2246 vlib_error_count (vm, error_node->node_index,
2247 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_RX,
2248 n_advertisements_rcvd);
2250 return frame->n_vectors;
2254 random_f64_from_to (f64 from, f64 to)
2256 static u32 seed = 0;
2257 static u8 seed_set = 0;
2260 seed = random_default_seed ();
2263 return random_f64 (&seed) * (to - from) + from;
2267 get_mac_address (u32 sw_if_index, u8 * address)
2269 vnet_main_t *vnm = vnet_get_main ();
2270 vnet_hw_interface_t *hw_if = vnet_get_sup_hw_interface (vnm, sw_if_index);
2271 if (!hw_if->hw_address)
2273 clib_memcpy (address, hw_if->hw_address, 6);
2277 static inline vlib_buffer_t *
2278 create_buffer_for_rs (vlib_main_t * vm, ip6_radv_t * radv_info)
2282 vlib_buffer_free_list_t *fl;
2283 icmp6_router_solicitation_header_t *rh;
2288 sw_if_index = radv_info->sw_if_index;
2290 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
2292 clib_warning ("buffer allocation failure");
2296 p0 = vlib_get_buffer (vm, bi0);
2297 fl = vlib_buffer_get_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2298 vlib_buffer_init_for_free_list (p0, fl);
2299 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (p0);
2300 p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
2302 vnet_buffer (p0)->sw_if_index[VLIB_RX] = sw_if_index;
2303 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index;
2305 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
2307 rh = vlib_buffer_get_current (p0);
2308 p0->current_length = sizeof (*rh);
2310 rh->neighbor.icmp.type = ICMP6_router_solicitation;
2311 rh->neighbor.icmp.code = 0;
2312 rh->neighbor.icmp.checksum = 0;
2313 rh->neighbor.reserved_must_be_zero = 0;
2315 rh->link_layer_option.header.type =
2316 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2317 if (0 != get_mac_address (sw_if_index,
2318 rh->link_layer_option.ethernet_address))
2320 clib_warning ("interface with sw_if_index %u has no mac address",
2322 vlib_buffer_free (vm, &bi0, 1);
2325 rh->link_layer_option.header.n_data_u64s = 1;
2327 payload_length = sizeof (rh->neighbor) + sizeof (u64);
2329 rh->ip.ip_version_traffic_class_and_flow_label =
2330 clib_host_to_net_u32 (0x6 << 28);
2331 rh->ip.payload_length = clib_host_to_net_u16 (payload_length);
2332 rh->ip.protocol = IP_PROTOCOL_ICMP6;
2333 rh->ip.hop_limit = 255;
2334 rh->ip.src_address = radv_info->link_local_address;
2335 /* set address ff02::2 */
2336 rh->ip.dst_address.as_u64[0] = clib_host_to_net_u64 (0xff02L << 48);
2337 rh->ip.dst_address.as_u64[1] = clib_host_to_net_u64 (2);
2339 rh->neighbor.icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, p0,
2347 stop_sending_rs (vlib_main_t * vm, ip6_radv_t * ra)
2351 ra->keep_sending_rs = 0;
2354 bi0 = vlib_get_buffer_index (vm, ra->buffer);
2355 vlib_buffer_free (vm, &bi0, 1);
2361 check_send_rs (vlib_main_t * vm, ip6_radv_t * radv_info, f64 current_time,
2371 icmp6_send_router_solicitation_params_t *params;
2373 if (!radv_info->keep_sending_rs)
2376 params = &radv_info->params;
2378 if (radv_info->due_time > current_time)
2380 *due_time = radv_info->due_time;
2384 p0 = radv_info->buffer;
2386 next_index = ip6_rewrite_mcast_node.index;
2388 c0 = vlib_buffer_copy (vm, p0);
2389 ci0 = vlib_get_buffer_index (vm, c0);
2391 f = vlib_get_frame_to_node (vm, next_index);
2392 to_next = vlib_frame_vector_args (f);
2395 vlib_put_frame_to_node (vm, next_index, f);
2397 if (params->mrc != 0 && --radv_info->n_left == 0)
2398 stop_sending_rs (vm, radv_info);
2401 radv_info->sleep_interval =
2402 (2 + random_f64_from_to (-0.1, 0.1)) * radv_info->sleep_interval;
2403 if (radv_info->sleep_interval > params->mrt)
2404 radv_info->sleep_interval =
2405 (1 + random_f64_from_to (-0.1, 0.1)) * params->mrt;
2407 radv_info->due_time = current_time + radv_info->sleep_interval;
2409 if (params->mrd != 0
2410 && current_time > radv_info->start_time + params->mrd)
2411 stop_sending_rs (vm, radv_info);
2413 *due_time = radv_info->due_time;
2416 return radv_info->keep_sending_rs;
2420 send_rs_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
2423 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2424 ip6_radv_t *radv_info;
2425 uword *event_data = 0;
2426 f64 sleep_time = 1e9;
2433 vlib_process_wait_for_event_or_clock (vm, sleep_time);
2434 vlib_process_get_events (vm, &event_data);
2435 vec_reset_length (event_data);
2437 current_time = vlib_time_now (vm);
2440 due_time = current_time + 1e9;
2442 pool_foreach (radv_info, nm->if_radv_pool,
2444 if (check_send_rs (vm, radv_info, current_time, &dt)
2449 current_time = vlib_time_now (vm);
2451 while (due_time < current_time);
2453 sleep_time = due_time - current_time;
2460 VLIB_REGISTER_NODE (send_rs_process_node) = {
2461 .function = send_rs_process,
2462 .type = VLIB_NODE_TYPE_PROCESS,
2463 .name = "send-rs-process",
2468 icmp6_send_router_solicitation (vlib_main_t * vm, u32 sw_if_index, u8 stop,
2469 icmp6_send_router_solicitation_params_t *
2472 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2476 ASSERT (~0 != sw_if_index);
2478 rai = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2479 ra = pool_elt_at_index (nm->if_radv_pool, rai);
2481 stop_sending_rs (vm, ra);
2485 ra->keep_sending_rs = 1;
2486 ra->params = *params;
2487 ra->n_left = params->mrc;
2488 ra->start_time = vlib_time_now (vm);
2489 ra->sleep_interval = (1 + random_f64_from_to (-0.1, 0.1)) * params->irt;
2490 ra->due_time = 0; /* send first packet ASAP */
2491 ra->buffer = create_buffer_for_rs (vm, ra);
2493 ra->keep_sending_rs = 0;
2495 vlib_process_signal_event (vm, send_rs_process_node.index, 1, 0);
2500 * @brief Add a multicast Address to the advertised MLD set
2503 ip6_neighbor_add_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2505 ip6_mldp_group_t *mcast_group_info;
2508 /* lookup mldp info for this interface */
2509 p = mhash_get (&radv_info->address_to_mldp_index, addr);
2511 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2514 if (!mcast_group_info)
2518 pool_get (radv_info->mldp_group_pool, mcast_group_info);
2520 mi = mcast_group_info - radv_info->mldp_group_pool;
2521 mhash_set (&radv_info->address_to_mldp_index, addr, mi, /* old_value */
2524 mcast_group_info->type = 4;
2525 mcast_group_info->mcast_source_address_pool = 0;
2526 mcast_group_info->num_sources = 0;
2527 clib_memcpy (&mcast_group_info->mcast_address, addr,
2528 sizeof (ip6_address_t));
2533 * @brief Delete a multicast Address from the advertised MLD set
2536 ip6_neighbor_del_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2538 ip6_mldp_group_t *mcast_group_info;
2541 p = mhash_get (&radv_info->address_to_mldp_index, &addr);
2543 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2545 if (mcast_group_info)
2547 mhash_unset (&radv_info->address_to_mldp_index, &addr,
2549 pool_put (radv_info->mldp_group_pool, mcast_group_info);
2554 * @brief Add a multicast Address to the advertised MLD set
2557 ip6_neighbor_add_mld_grp (ip6_radv_t * a,
2558 ip6_multicast_address_scope_t scope,
2559 ip6_multicast_link_local_group_id_t group)
2563 ip6_set_reserved_multicast_address (&addr, scope, group);
2565 ip6_neighbor_add_mld_prefix (a, &addr);
2569 * @brief create and initialize router advertisement parameters with default
2570 * values for this intfc
2573 ip6_neighbor_sw_interface_add_del (vnet_main_t * vnm,
2574 u32 sw_if_index, u32 is_add)
2576 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2579 vnet_sw_interface_t *sw_if0;
2580 ethernet_interface_t *eth_if0 = 0;
2582 /* lookup radv container - ethernet interfaces only */
2583 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2584 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2585 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2590 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2592 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2596 a = pool_elt_at_index (nm->if_radv_pool, ri);
2600 ip6_radv_prefix_t *p;
2601 ip6_mldp_group_t *m;
2603 /* release the lock on the interface's mcast adj */
2604 adj_unlock (a->mcast_adj_index);
2606 /* clean up prefix and MDP pools */
2608 pool_flush(p, a->adv_prefixes_pool,
2610 mhash_unset (&a->address_to_prefix_index, &p->prefix, 0);
2612 pool_flush (m, a->mldp_group_pool,
2614 mhash_unset (&a->address_to_mldp_index, &m->mcast_address, 0);
2618 pool_free (a->mldp_group_pool);
2619 pool_free (a->adv_prefixes_pool);
2621 mhash_free (&a->address_to_prefix_index);
2622 mhash_free (&a->address_to_mldp_index);
2624 if (a->keep_sending_rs)
2625 a->keep_sending_rs = 0;
2627 pool_put (nm->if_radv_pool, a);
2628 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ~0;
2636 vnet_hw_interface_t *hw_if0;
2638 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index);
2640 pool_get (nm->if_radv_pool, a);
2642 ri = a - nm->if_radv_pool;
2643 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ri;
2645 /* initialize default values (most of which are zero) */
2646 memset (a, 0, sizeof (a[0]));
2648 a->sw_if_index = sw_if_index;
2649 a->max_radv_interval = DEF_MAX_RADV_INTERVAL;
2650 a->min_radv_interval = DEF_MIN_RADV_INTERVAL;
2651 a->curr_hop_limit = DEF_CURR_HOP_LIMIT;
2652 a->adv_router_lifetime_in_sec = DEF_DEF_RTR_LIFETIME;
2654 /* send ll address source address option */
2655 a->adv_link_layer_address = 1;
2657 a->min_delay_between_radv = MIN_DELAY_BETWEEN_RAS;
2658 a->max_delay_between_radv = MAX_DELAY_BETWEEN_RAS;
2659 a->max_rtr_default_lifetime = MAX_DEF_RTR_LIFETIME;
2660 a->seed = (u32) clib_cpu_time_now ();
2661 (void) random_u32 (&a->seed);
2662 a->randomizer = clib_cpu_time_now ();
2663 (void) random_u64 (&a->randomizer);
2665 a->initial_adverts_count = MAX_INITIAL_RTR_ADVERTISEMENTS;
2666 a->initial_adverts_sent = a->initial_adverts_count - 1;
2667 a->initial_adverts_interval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
2669 /* deafult is to send */
2672 /* fill in radv_info for this interface that will be needed later */
2673 a->adv_link_mtu = hw_if0->max_l3_packet_bytes[VLIB_RX];
2675 clib_memcpy (a->link_layer_address, eth_if0->address, 6);
2677 /* fill in default link-local address (this may be overridden) */
2678 ip6_link_local_address_from_ethernet_address
2679 (&a->link_local_address, eth_if0->address);
2681 mhash_init (&a->address_to_prefix_index, sizeof (uword),
2682 sizeof (ip6_address_t));
2683 mhash_init (&a->address_to_mldp_index, sizeof (uword),
2684 sizeof (ip6_address_t));
2686 a->mcast_adj_index = adj_mcast_add_or_lock (FIB_PROTOCOL_IP6,
2690 a->keep_sending_rs = 0;
2692 /* add multicast groups we will always be reporting */
2693 ip6_neighbor_add_mld_grp (a,
2694 IP6_MULTICAST_SCOPE_link_local,
2695 IP6_MULTICAST_GROUP_ID_all_hosts);
2696 ip6_neighbor_add_mld_grp (a,
2697 IP6_MULTICAST_SCOPE_link_local,
2698 IP6_MULTICAST_GROUP_ID_all_routers);
2699 ip6_neighbor_add_mld_grp (a,
2700 IP6_MULTICAST_SCOPE_link_local,
2701 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2707 /* send an mldpv2 report */
2709 ip6_neighbor_send_mldpv2_report (u32 sw_if_index)
2711 vnet_main_t *vnm = vnet_get_main ();
2712 vlib_main_t *vm = vnm->vlib_main;
2713 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2714 vnet_sw_interface_t *sw_if0;
2715 ethernet_interface_t *eth_if0;
2719 ip6_radv_t *radv_info;
2729 icmp6_multicast_listener_report_header_t *rh0;
2730 icmp6_multicast_listener_report_packet_t *rp0;
2732 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2733 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
2734 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2736 if (!eth_if0 || !vnet_sw_interface_is_admin_up (vnm, sw_if_index))
2739 /* look up the radv_t information for this interface */
2740 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2743 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2748 /* send report now - build a mldpv2 report packet */
2749 n_allocated = vlib_buffer_alloc_from_free_list (vm,
2752 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2753 if (PREDICT_FALSE (n_allocated == 0))
2755 clib_warning ("buffer allocation failure");
2759 b0 = vlib_get_buffer (vm, bo0);
2761 /* adjust the sizeof the buffer to just include the ipv6 header */
2762 b0->current_length = sizeof (icmp6_multicast_listener_report_packet_t);
2764 payload_length = sizeof (icmp6_multicast_listener_report_header_t);
2766 b0->error = ICMP6_ERROR_NONE;
2768 rp0 = vlib_buffer_get_current (b0);
2769 ip0 = (ip6_header_t *) & rp0->ip;
2770 rh0 = (icmp6_multicast_listener_report_header_t *) & rp0->report_hdr;
2772 memset (rp0, 0x0, sizeof (icmp6_multicast_listener_report_packet_t));
2774 ip0->ip_version_traffic_class_and_flow_label =
2775 clib_host_to_net_u32 (0x6 << 28);
2777 ip0->protocol = IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS;
2778 /* for DEBUG - vnet driver won't seem to emit router alerts */
2779 /* ip0->protocol = IP_PROTOCOL_ICMP6; */
2782 rh0->icmp.type = ICMP6_multicast_listener_report_v2;
2784 /* source address MUST be the link-local address */
2785 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2786 ip0->src_address = radv_info->link_local_address;
2788 /* destination is all mldpv2 routers */
2789 ip6_set_reserved_multicast_address (&ip0->dst_address,
2790 IP6_MULTICAST_SCOPE_link_local,
2791 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2793 /* add reports here */
2794 ip6_mldp_group_t *m;
2795 int num_addr_records = 0;
2796 icmp6_multicast_address_record_t rr;
2798 /* fill in the hop-by-hop extension header (router alert) info */
2799 rh0->ext_hdr.next_hdr = IP_PROTOCOL_ICMP6;
2800 rh0->ext_hdr.n_data_u64s = 0;
2802 rh0->alert.type = IP6_MLDP_ALERT_TYPE;
2804 rh0->alert.value = 0;
2809 rh0->icmp.checksum = 0;
2812 pool_foreach (m, radv_info->mldp_group_pool,
2815 rr.aux_data_len_u32s = 0;
2816 rr.num_sources = clib_host_to_net_u16 (m->num_sources);
2817 clib_memcpy(&rr.mcast_addr, &m->mcast_address, sizeof(ip6_address_t));
2821 vlib_buffer_add_data
2822 (vm, vlib_buffer_get_free_list_index (b0), bo0,
2823 (void *)&rr, sizeof(icmp6_multicast_address_record_t));
2825 payload_length += sizeof( icmp6_multicast_address_record_t);
2830 rh0->num_addr_records = clib_host_to_net_u16 (num_addr_records);
2832 /* update lengths */
2833 ip0->payload_length = clib_host_to_net_u16 (payload_length);
2835 rh0->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0,
2837 ASSERT (bogus_length == 0);
2840 * OK to override w/ no regard for actual FIB, because
2841 * ip6-rewrite only looks at the adjacency.
2843 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
2844 vnet_main.local_interface_sw_if_index;
2846 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
2847 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
2849 vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite-mcast");
2851 f = vlib_get_frame_to_node (vm, node->index);
2852 to_next = vlib_frame_vector_args (f);
2856 vlib_put_frame_to_node (vm, node->index, f);
2861 VLIB_REGISTER_NODE (ip6_icmp_router_solicitation_node,static) =
2863 .function = icmp6_router_solicitation,
2864 .name = "icmp6-router-solicitation",
2866 .vector_size = sizeof (u32),
2868 .format_trace = format_icmp6_input_trace,
2870 .n_next_nodes = ICMP6_ROUTER_SOLICITATION_N_NEXT,
2872 [ICMP6_ROUTER_SOLICITATION_NEXT_DROP] = "ip6-drop",
2873 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW] = "ip6-rewrite-mcast",
2874 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX] = "interface-output",
2879 /* send a RA or update the timer info etc.. */
2881 ip6_neighbor_process_timer_event (vlib_main_t * vm,
2882 vlib_node_runtime_t * node,
2883 vlib_frame_t * frame)
2885 vnet_main_t *vnm = vnet_get_main ();
2886 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2887 ip6_radv_t *radv_info;
2888 vlib_frame_t *f = 0;
2889 u32 n_this_frame = 0;
2890 u32 n_left_to_next = 0;
2893 icmp6_router_solicitation_header_t *h0;
2895 f64 now = vlib_time_now (vm);
2897 /* Interface ip6 radv info list */
2899 pool_foreach (radv_info, nm->if_radv_pool,
2901 if( !vnet_sw_interface_is_admin_up (vnm, radv_info->sw_if_index))
2903 radv_info->initial_adverts_sent = radv_info->initial_adverts_count-1;
2904 radv_info->next_multicast_time = now;
2905 radv_info->last_multicast_time = now;
2906 radv_info->last_radv_time = 0;
2907 radv_info->all_routers_mcast = 0;
2911 /* Make sure that we've joined the all-routers multicast group */
2912 if(!radv_info->all_routers_mcast)
2914 /* send MDLP_REPORT_EVENT message */
2915 ip6_neighbor_send_mldpv2_report(radv_info->sw_if_index);
2916 radv_info->all_routers_mcast = 1;
2919 /* is it time to send a multicast RA on this interface? */
2920 if(radv_info->send_radv && (now >= radv_info->next_multicast_time))
2925 f64 rfn = (radv_info->max_radv_interval - radv_info->min_radv_interval) *
2926 random_f64 (&radv_info->seed) + radv_info->min_radv_interval;
2928 /* multicast send - compute next multicast send time */
2929 if( radv_info->initial_adverts_sent > 0)
2931 radv_info->initial_adverts_sent--;
2932 if(rfn > radv_info-> initial_adverts_interval)
2933 rfn = radv_info-> initial_adverts_interval;
2935 /* check to see if we are ceasing to send */
2936 if( radv_info->initial_adverts_sent == 0)
2937 if(radv_info->cease_radv)
2938 radv_info->send_radv = 0;
2941 radv_info->next_multicast_time = rfn + now;
2942 radv_info->last_multicast_time = now;
2944 /* send advert now - build a "solicted" router advert with unspecified source address */
2945 n_allocated = vlib_buffer_alloc_from_free_list
2946 (vm, &bo0, n_to_alloc, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2948 if (PREDICT_FALSE(n_allocated == 0))
2950 clib_warning ("buffer allocation failure");
2953 b0 = vlib_get_buffer (vm, bo0);
2954 b0->current_length = sizeof( icmp6_router_solicitation_header_t);
2955 b0->error = ICMP6_ERROR_NONE;
2956 vnet_buffer (b0)->sw_if_index[VLIB_RX] = radv_info->sw_if_index;
2958 h0 = vlib_buffer_get_current (b0);
2960 memset (h0, 0, sizeof (icmp6_router_solicitation_header_t));
2962 h0->ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2963 h0->ip.payload_length = clib_host_to_net_u16 (sizeof (icmp6_router_solicitation_header_t)
2964 - STRUCT_OFFSET_OF (icmp6_router_solicitation_header_t, neighbor));
2965 h0->ip.protocol = IP_PROTOCOL_ICMP6;
2966 h0->ip.hop_limit = 255;
2968 /* set src/dst address as "unspecified" this marks this packet as internally generated rather than recieved */
2969 h0->ip.src_address.as_u64[0] = 0;
2970 h0->ip.src_address.as_u64[1] = 0;
2972 h0->ip.dst_address.as_u64[0] = 0;
2973 h0->ip.dst_address.as_u64[1] = 0;
2975 h0->neighbor.icmp.type = ICMP6_router_solicitation;
2977 if (PREDICT_FALSE(f == 0))
2979 f = vlib_get_frame_to_node (vm, ip6_icmp_router_solicitation_node.index);
2980 to_next = vlib_frame_vector_args (f);
2981 n_left_to_next = VLIB_FRAME_SIZE;
2990 if (PREDICT_FALSE(n_left_to_next == 0))
2992 f->n_vectors = n_this_frame;
2993 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
3002 ASSERT (n_this_frame);
3003 f->n_vectors = n_this_frame;
3004 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
3010 ip6_icmp_neighbor_discovery_event_process (vlib_main_t * vm,
3011 vlib_node_runtime_t * node,
3012 vlib_frame_t * frame)
3015 ip6_icmp_neighbor_discovery_event_data_t *event_data;
3017 /* init code here */
3021 vlib_process_wait_for_event_or_clock (vm, 1. /* seconds */ );
3023 event_data = vlib_process_get_event_data (vm, &event_type);
3027 /* No events found: timer expired. */
3028 /* process interface list and send RAs as appropriate, update timer info */
3029 ip6_neighbor_process_timer_event (vm, node, frame);
3036 case ICMP6_ND_EVENT_INIT:
3047 _vec_len (event_data) = 0;
3050 return frame->n_vectors;
3054 VLIB_REGISTER_NODE (ip6_icmp_router_advertisement_node,static) =
3056 .function = icmp6_router_advertisement,
3057 .name = "icmp6-router-advertisement",
3059 .vector_size = sizeof (u32),
3061 .format_trace = format_icmp6_input_trace,
3070 vlib_node_registration_t ip6_icmp_neighbor_discovery_event_node = {
3072 .function = ip6_icmp_neighbor_discovery_event_process,
3073 .name = "ip6-icmp-neighbor-discovery-event-process",
3074 .type = VLIB_NODE_TYPE_PROCESS,
3078 icmp6_neighbor_solicitation (vlib_main_t * vm,
3079 vlib_node_runtime_t * node, vlib_frame_t * frame)
3081 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
3082 /* is_solicitation */
3087 icmp6_neighbor_advertisement (vlib_main_t * vm,
3088 vlib_node_runtime_t * node,
3089 vlib_frame_t * frame)
3091 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
3092 /* is_solicitation */
3097 VLIB_REGISTER_NODE (ip6_icmp_neighbor_solicitation_node,static) =
3099 .function = icmp6_neighbor_solicitation,
3100 .name = "icmp6-neighbor-solicitation",
3102 .vector_size = sizeof (u32),
3104 .format_trace = format_icmp6_input_trace,
3106 .n_next_nodes = ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
3108 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP] = "ip6-drop",
3109 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY] = "interface-output",
3115 VLIB_REGISTER_NODE (ip6_icmp_neighbor_advertisement_node,static) =
3117 .function = icmp6_neighbor_advertisement,
3118 .name = "icmp6-neighbor-advertisement",
3120 .vector_size = sizeof (u32),
3122 .format_trace = format_icmp6_input_trace,
3133 IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
3134 IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX,
3135 IP6_DISCOVER_NEIGHBOR_N_NEXT,
3136 } ip6_discover_neighbor_next_t;
3140 IP6_DISCOVER_NEIGHBOR_ERROR_DROP,
3141 IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT,
3142 IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS,
3143 } ip6_discover_neighbor_error_t;
3146 ip6_discover_neighbor_inline (vlib_main_t * vm,
3147 vlib_node_runtime_t * node,
3148 vlib_frame_t * frame, int is_glean)
3150 vnet_main_t *vnm = vnet_get_main ();
3151 ip6_main_t *im = &ip6_main;
3152 ip_lookup_main_t *lm = &im->lookup_main;
3153 u32 *from, *to_next_drop;
3154 uword n_left_from, n_left_to_next_drop;
3155 static f64 time_last_seed_change = -1e100;
3156 static u32 hash_seeds[3];
3157 static uword hash_bitmap[256 / BITS (uword)];
3160 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3162 if (node->flags & VLIB_NODE_FLAG_TRACE)
3163 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
3165 time_now = vlib_time_now (vm);
3166 if (time_now - time_last_seed_change > 1e-3)
3169 u32 *r = clib_random_buffer_get_data (&vm->random_buffer,
3170 sizeof (hash_seeds));
3171 for (i = 0; i < ARRAY_LEN (hash_seeds); i++)
3172 hash_seeds[i] = r[i];
3174 /* Mark all hash keys as been not-seen before. */
3175 for (i = 0; i < ARRAY_LEN (hash_bitmap); i++)
3178 time_last_seed_change = time_now;
3181 from = vlib_frame_vector_args (frame);
3182 n_left_from = frame->n_vectors;
3184 while (n_left_from > 0)
3186 vlib_get_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
3187 to_next_drop, n_left_to_next_drop);
3189 while (n_left_from > 0 && n_left_to_next_drop > 0)
3193 u32 pi0, adj_index0, a0, b0, c0, m0, sw_if_index0, drop0;
3195 ip_adjacency_t *adj0;
3196 vnet_hw_interface_t *hw_if0;
3197 ip6_radv_t *radv_info;
3202 p0 = vlib_get_buffer (vm, pi0);
3204 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
3206 ip0 = vlib_buffer_get_current (p0);
3208 adj0 = adj_get (adj_index0);
3212 ip0->dst_address.as_u64[0] =
3213 adj0->sub_type.nbr.next_hop.ip6.as_u64[0];
3214 ip0->dst_address.as_u64[1] =
3215 adj0->sub_type.nbr.next_hop.ip6.as_u64[1];
3222 sw_if_index0 = adj0->rewrite_header.sw_if_index;
3223 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
3226 b0 ^= ip0->dst_address.as_u32[0];
3227 c0 ^= ip0->dst_address.as_u32[1];
3229 hash_v3_mix32 (a0, b0, c0);
3231 b0 ^= ip0->dst_address.as_u32[2];
3232 c0 ^= ip0->dst_address.as_u32[3];
3234 hash_v3_finalize32 (a0, b0, c0);
3236 c0 &= BITS (hash_bitmap) - 1;
3237 c0 = c0 / BITS (uword);
3238 m0 = (uword) 1 << (c0 % BITS (uword));
3240 bm0 = hash_bitmap[c0];
3241 drop0 = (bm0 & m0) != 0;
3243 /* Mark it as seen. */
3244 hash_bitmap[c0] = bm0 | m0;
3248 to_next_drop[0] = pi0;
3250 n_left_to_next_drop -= 1;
3252 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
3254 /* If the interface is link-down, drop the pkt */
3255 if (!(hw_if0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
3258 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) > sw_if_index0)
3260 u32 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
3263 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3271 * the adj has been updated to a rewrite but the node the DPO that got
3272 * us here hasn't - yet. no big deal. we'll drop while we wait.
3274 if (IP_LOOKUP_NEXT_REWRITE == adj0->lookup_next_index)
3278 node->errors[drop0 ? IP6_DISCOVER_NEIGHBOR_ERROR_DROP
3279 : IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT];
3286 icmp6_neighbor_solicitation_header_t *h0;
3289 h0 = vlib_packet_template_get_packet
3290 (vm, &im->discover_neighbor_packet_template, &bi0);
3293 * Build ethernet header.
3294 * Choose source address based on destination lookup
3297 if (!ip6_src_address_for_packet (lm,
3300 &h0->ip.src_address))
3302 /* There is no address on the interface */
3304 node->errors[IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS];
3305 vlib_buffer_free (vm, &bi0, 1);
3310 * Destination address is a solicited node multicast address.
3311 * We need to fill in
3312 * the low 24 bits with low 24 bits of target's address.
3314 h0->ip.dst_address.as_u8[13] = ip0->dst_address.as_u8[13];
3315 h0->ip.dst_address.as_u8[14] = ip0->dst_address.as_u8[14];
3316 h0->ip.dst_address.as_u8[15] = ip0->dst_address.as_u8[15];
3318 h0->neighbor.target_address = ip0->dst_address;
3320 clib_memcpy (h0->link_layer_option.ethernet_address,
3321 hw_if0->hw_address, vec_len (hw_if0->hw_address));
3323 /* $$$$ appears we need this; why is the checksum non-zero? */
3324 h0->neighbor.icmp.checksum = 0;
3325 h0->neighbor.icmp.checksum =
3326 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h0->ip,
3329 ASSERT (bogus_length == 0);
3331 vlib_buffer_copy_trace_flag (vm, p0, bi0);
3332 b0 = vlib_get_buffer (vm, bi0);
3333 vnet_buffer (b0)->sw_if_index[VLIB_TX]
3334 = vnet_buffer (p0)->sw_if_index[VLIB_TX];
3336 vnet_buffer (b0)->ip.adj_index[VLIB_TX] =
3337 radv_info->mcast_adj_index;
3339 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
3340 next0 = IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX;
3342 vlib_set_next_frame_buffer (vm, node, next0, bi0);
3346 vlib_put_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
3347 n_left_to_next_drop);
3350 return frame->n_vectors;
3354 ip6_discover_neighbor (vlib_main_t * vm,
3355 vlib_node_runtime_t * node, vlib_frame_t * frame)
3357 return (ip6_discover_neighbor_inline (vm, node, frame, 0));
3361 ip6_glean (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3363 return (ip6_discover_neighbor_inline (vm, node, frame, 1));
3366 static char *ip6_discover_neighbor_error_strings[] = {
3367 [IP6_DISCOVER_NEIGHBOR_ERROR_DROP] = "address overflow drops",
3368 [IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT] = "neighbor solicitations sent",
3369 [IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS]
3370 = "no source address for ND solicitation",
3374 VLIB_REGISTER_NODE (ip6_glean_node) =
3376 .function = ip6_glean,
3377 .name = "ip6-glean",
3378 .vector_size = sizeof (u32),
3379 .format_trace = format_ip6_forward_next_trace,
3380 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
3381 .error_strings = ip6_discover_neighbor_error_strings,
3382 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
3385 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "ip6-drop",
3386 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "ip6-rewrite-mcast",
3389 VLIB_REGISTER_NODE (ip6_discover_neighbor_node) =
3391 .function = ip6_discover_neighbor,
3392 .name = "ip6-discover-neighbor",
3393 .vector_size = sizeof (u32),
3394 .format_trace = format_ip6_forward_next_trace,
3395 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
3396 .error_strings = ip6_discover_neighbor_error_strings,
3397 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
3400 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "ip6-drop",
3401 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "ip6-rewrite-mcast",
3406 /* API support functions */
3408 ip6_neighbor_ra_config (vlib_main_t * vm, u32 sw_if_index,
3409 u8 suppress, u8 managed, u8 other,
3410 u8 ll_option, u8 send_unicast, u8 cease,
3411 u8 use_lifetime, u32 lifetime,
3412 u32 initial_count, u32 initial_interval,
3413 u32 max_interval, u32 min_interval, u8 is_no)
3415 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3419 /* look up the radv_t information for this interface */
3420 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3422 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3423 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
3428 ip6_radv_t *radv_info;
3429 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3431 if ((max_interval != 0) && (min_interval == 0))
3432 min_interval = .75 * max_interval;
3436 0) ? ((is_no) ? DEF_MAX_RADV_INTERVAL : max_interval) :
3437 radv_info->max_radv_interval;
3440 0) ? ((is_no) ? DEF_MIN_RADV_INTERVAL : min_interval) :
3441 radv_info->min_radv_interval;
3444 0) ? ((is_no) ? DEF_DEF_RTR_LIFETIME : lifetime) :
3445 radv_info->adv_router_lifetime_in_sec;
3449 if (lifetime > MAX_DEF_RTR_LIFETIME)
3450 lifetime = MAX_DEF_RTR_LIFETIME;
3452 if (lifetime <= max_interval)
3453 return VNET_API_ERROR_INVALID_VALUE;
3456 if (min_interval != 0)
3458 if ((min_interval > .75 * max_interval) || (min_interval < 3))
3459 return VNET_API_ERROR_INVALID_VALUE;
3462 if ((initial_count > MAX_INITIAL_RTR_ADVERTISEMENTS) ||
3463 (initial_interval > MAX_INITIAL_RTR_ADVERT_INTERVAL))
3464 return VNET_API_ERROR_INVALID_VALUE;
3467 if "flag" is set and is_no is true then restore default value else set value corresponding to "flag"
3468 if "flag" is clear don't change corresponding value
3470 radv_info->send_radv =
3471 (suppress != 0) ? ((is_no != 0) ? 1 : 0) : radv_info->send_radv;
3472 radv_info->adv_managed_flag =
3473 (managed != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_managed_flag;
3474 radv_info->adv_other_flag =
3475 (other != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_other_flag;
3476 radv_info->adv_link_layer_address =
3478 0) ? ((is_no) ? 1 : 0) : radv_info->adv_link_layer_address;
3479 radv_info->send_unicast =
3480 (send_unicast != 0) ? ((is_no) ? 0 : 1) : radv_info->send_unicast;
3481 radv_info->cease_radv =
3482 (cease != 0) ? ((is_no) ? 0 : 1) : radv_info->cease_radv;
3484 radv_info->min_radv_interval = min_interval;
3485 radv_info->max_radv_interval = max_interval;
3486 radv_info->adv_router_lifetime_in_sec = lifetime;
3488 radv_info->initial_adverts_count =
3490 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERTISEMENTS : initial_count) :
3491 radv_info->initial_adverts_count;
3492 radv_info->initial_adverts_interval =
3493 (initial_interval !=
3494 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERT_INTERVAL : initial_interval) :
3495 radv_info->initial_adverts_interval;
3498 if ((cease != 0) && (is_no))
3499 radv_info->send_radv = 1;
3501 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
3502 radv_info->next_multicast_time = vlib_time_now (vm);
3503 radv_info->last_multicast_time = vlib_time_now (vm);
3504 radv_info->last_radv_time = 0;
3510 ip6_neighbor_ra_prefix (vlib_main_t * vm, u32 sw_if_index,
3511 ip6_address_t * prefix_addr, u8 prefix_len,
3512 u8 use_default, u32 val_lifetime, u32 pref_lifetime,
3513 u8 no_advertise, u8 off_link, u8 no_autoconfig,
3514 u8 no_onlink, u8 is_no)
3516 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3521 /* look up the radv_t information for this interface */
3522 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3525 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3527 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
3531 f64 now = vlib_time_now (vm);
3532 ip6_radv_t *radv_info;
3533 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3535 /* prefix info add, delete or update */
3536 ip6_radv_prefix_t *prefix;
3538 /* lookup prefix info for this address on this interface */
3539 uword *p = mhash_get (&radv_info->address_to_prefix_index, prefix_addr);
3541 prefix = p ? pool_elt_at_index (radv_info->adv_prefixes_pool, p[0]) : 0;
3547 return VNET_API_ERROR_INVALID_VALUE; /* invalid prefix */
3549 if (prefix->prefix_len != prefix_len)
3550 return VNET_API_ERROR_INVALID_VALUE_2;
3552 /* FIXME - Should the DP do this or the CP ? */
3553 /* do specific delete processing here before returning */
3554 /* try to remove from routing table */
3556 mhash_unset (&radv_info->address_to_prefix_index, prefix_addr,
3558 pool_put (radv_info->adv_prefixes_pool, prefix);
3560 radv_info->initial_adverts_sent =
3561 radv_info->initial_adverts_count - 1;
3562 radv_info->next_multicast_time = vlib_time_now (vm);
3563 radv_info->last_multicast_time = vlib_time_now (vm);
3564 radv_info->last_radv_time = 0;
3568 /* adding or changing */
3573 pool_get (radv_info->adv_prefixes_pool, prefix);
3574 pi = prefix - radv_info->adv_prefixes_pool;
3575 mhash_set (&radv_info->address_to_prefix_index, prefix_addr, pi,
3578 memset (prefix, 0x0, sizeof (ip6_radv_prefix_t));
3580 prefix->prefix_len = prefix_len;
3581 clib_memcpy (&prefix->prefix, prefix_addr, sizeof (ip6_address_t));
3583 /* initialize default values */
3584 prefix->adv_on_link_flag = 1; /* L bit set */
3585 prefix->adv_autonomous_flag = 1; /* A bit set */
3586 prefix->adv_valid_lifetime_in_secs = DEF_ADV_VALID_LIFETIME;
3587 prefix->adv_pref_lifetime_in_secs = DEF_ADV_PREF_LIFETIME;
3588 prefix->enabled = 1;
3589 prefix->decrement_lifetime_flag = 1;
3590 prefix->deprecated_prefix_flag = 1;
3594 /* FIXME - Should the DP do this or the CP ? */
3595 /* insert prefix into routing table as a connected prefix */
3604 if (prefix->prefix_len != prefix_len)
3605 return VNET_API_ERROR_INVALID_VALUE_2;
3609 /* FIXME - Should the DP do this or the CP ? */
3610 /* remove from routing table if already there */
3614 if ((val_lifetime == ~0) || (pref_lifetime == ~0))
3616 prefix->adv_valid_lifetime_in_secs = ~0;
3617 prefix->adv_pref_lifetime_in_secs = ~0;
3618 prefix->decrement_lifetime_flag = 0;
3622 prefix->adv_valid_lifetime_in_secs = val_lifetime;;
3623 prefix->adv_pref_lifetime_in_secs = pref_lifetime;
3626 /* copy remaining */
3627 prefix->enabled = !(no_advertise != 0);
3628 prefix->adv_on_link_flag = !((off_link != 0) || (no_onlink != 0));
3629 prefix->adv_autonomous_flag = !(no_autoconfig != 0);
3633 /* fill in the expiration times */
3634 prefix->valid_lifetime_expires =
3635 now + prefix->adv_valid_lifetime_in_secs;
3636 prefix->pref_lifetime_expires = now + prefix->adv_pref_lifetime_in_secs;
3638 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
3639 radv_info->next_multicast_time = vlib_time_now (vm);
3640 radv_info->last_multicast_time = vlib_time_now (vm);
3641 radv_info->last_radv_time = 0;
3647 ip6_neighbor_cmd (vlib_main_t * vm, unformat_input_t * main_input,
3648 vlib_cli_command_t * cmd)
3650 vnet_main_t *vnm = vnet_get_main ();
3651 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3652 clib_error_t *error = 0;
3654 u8 suppress = 0, managed = 0, other = 0;
3655 u8 suppress_ll_option = 0, send_unicast = 0, cease = 0;
3656 u8 use_lifetime = 0;
3657 u32 sw_if_index, ra_lifetime = 0, ra_initial_count =
3658 0, ra_initial_interval = 0;
3659 u32 ra_max_interval = 0, ra_min_interval = 0;
3661 unformat_input_t _line_input, *line_input = &_line_input;
3662 vnet_sw_interface_t *sw_if0;
3664 int add_radv_info = 1;
3665 __attribute__ ((unused)) ip6_radv_t *radv_info = 0;
3666 ip6_address_t ip6_addr;
3670 /* Get a line of input. */
3671 if (!unformat_user (main_input, unformat_line_input, line_input))
3674 /* get basic radv info for this interface */
3675 if (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3678 if (unformat_user (line_input,
3679 unformat_vnet_sw_interface, vnm, &sw_if_index))
3682 ethernet_interface_t *eth_if0 = 0;
3684 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
3685 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
3687 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
3692 clib_error_return (0, "Interface must be of ethernet type");
3696 /* look up the radv_t information for this interface */
3697 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3700 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3704 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3708 error = clib_error_return (0, "unknown interface %U'",
3709 format_unformat_error, line_input);
3715 error = clib_error_return (0, "invalid interface name %U'",
3716 format_unformat_error, line_input);
3721 /* get the rest of the command */
3722 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3724 if (unformat (line_input, "no"))
3726 else if (unformat (line_input, "prefix %U/%d",
3727 unformat_ip6_address, &ip6_addr, &addr_len))
3732 else if (unformat (line_input, "ra-managed-config-flag"))
3737 else if (unformat (line_input, "ra-other-config-flag"))
3742 else if (unformat (line_input, "ra-suppress") ||
3743 unformat (line_input, "ra-surpress"))
3748 else if (unformat (line_input, "ra-suppress-link-layer") ||
3749 unformat (line_input, "ra-surpress-link-layer"))
3751 suppress_ll_option = 1;
3754 else if (unformat (line_input, "ra-send-unicast"))
3759 else if (unformat (line_input, "ra-lifetime"))
3761 if (!unformat (line_input, "%d", &ra_lifetime))
3763 error = unformat_parse_error (line_input);
3769 else if (unformat (line_input, "ra-initial"))
3772 (line_input, "%d %d", &ra_initial_count, &ra_initial_interval))
3774 error = unformat_parse_error (line_input);
3779 else if (unformat (line_input, "ra-interval"))
3781 if (!unformat (line_input, "%d", &ra_max_interval))
3783 error = unformat_parse_error (line_input);
3787 if (!unformat (line_input, "%d", &ra_min_interval))
3788 ra_min_interval = 0;
3791 else if (unformat (line_input, "ra-cease"))
3798 error = unformat_parse_error (line_input);
3805 ip6_neighbor_ra_config (vm, sw_if_index,
3806 suppress, managed, other,
3807 suppress_ll_option, send_unicast, cease,
3808 use_lifetime, ra_lifetime,
3809 ra_initial_count, ra_initial_interval,
3810 ra_max_interval, ra_min_interval, is_no);
3814 u32 valid_lifetime_in_secs = 0;
3815 u32 pref_lifetime_in_secs = 0;
3816 u8 use_prefix_default_values = 0;
3817 u8 no_advertise = 0;
3819 u8 no_autoconfig = 0;
3822 /* get the rest of the command */
3823 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3825 if (unformat (line_input, "default"))
3827 use_prefix_default_values = 1;
3830 else if (unformat (line_input, "infinite"))
3832 valid_lifetime_in_secs = ~0;
3833 pref_lifetime_in_secs = ~0;
3836 else if (unformat (line_input, "%d %d", &valid_lifetime_in_secs,
3837 &pref_lifetime_in_secs))
3844 /* get the rest of the command */
3845 while (!use_prefix_default_values &&
3846 unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3848 if (unformat (line_input, "no-advertise"))
3850 else if (unformat (line_input, "off-link"))
3852 else if (unformat (line_input, "no-autoconfig"))
3854 else if (unformat (line_input, "no-onlink"))
3858 error = unformat_parse_error (line_input);
3863 ip6_neighbor_ra_prefix (vm, sw_if_index,
3864 &ip6_addr, addr_len,
3865 use_prefix_default_values,
3866 valid_lifetime_in_secs,
3867 pref_lifetime_in_secs,
3869 off_link, no_autoconfig, no_onlink, is_no);
3873 unformat_free (line_input);
3879 ip6_print_addrs (vlib_main_t * vm, u32 * addrs)
3881 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3884 for (i = 0; i < vec_len (addrs); i++)
3886 ip_interface_address_t *a =
3887 pool_elt_at_index (lm->if_address_pool, addrs[i]);
3888 ip6_address_t *address = ip_interface_address_get_address (lm, a);
3890 vlib_cli_output (vm, "\t\t%U/%d",
3891 format_ip6_address, address, a->address_length);
3895 static clib_error_t *
3896 show_ip6_interface_cmd (vlib_main_t * vm,
3897 unformat_input_t * input, vlib_cli_command_t * cmd)
3899 vnet_main_t *vnm = vnet_get_main ();
3900 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3901 clib_error_t *error = 0;
3906 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3910 /* look up the radv_t information for this interface */
3911 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3914 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3918 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3919 ip6_radv_t *radv_info;
3920 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3922 vlib_cli_output (vm, "%U is admin %s\n",
3923 format_vnet_sw_interface_name, vnm,
3924 vnet_get_sw_interface (vnm, sw_if_index),
3925 (vnet_sw_interface_is_admin_up (vnm, sw_if_index) ?
3929 u32 *link_scope = 0, *global_scope = 0;
3930 u32 *local_scope = 0, *unknown_scope = 0;
3931 ip_interface_address_t *a;
3933 vec_validate_init_empty (lm->if_address_pool_index_by_sw_if_index,
3935 ai = lm->if_address_pool_index_by_sw_if_index[sw_if_index];
3937 while (ai != (u32) ~ 0)
3939 a = pool_elt_at_index (lm->if_address_pool, ai);
3940 ip6_address_t *address =
3941 ip_interface_address_get_address (lm, a);
3943 if (ip6_address_is_link_local_unicast (address))
3944 vec_add1 (link_scope, ai);
3945 else if (ip6_address_is_global_unicast (address))
3946 vec_add1 (global_scope, ai);
3947 else if (ip6_address_is_local_unicast (address))
3948 vec_add1 (local_scope, ai);
3950 vec_add1 (unknown_scope, ai);
3952 ai = a->next_this_sw_interface;
3955 if (vec_len (link_scope))
3957 vlib_cli_output (vm, "\tLink-local address(es):\n");
3958 ip6_print_addrs (vm, link_scope);
3959 vec_free (link_scope);
3962 if (vec_len (local_scope))
3964 vlib_cli_output (vm, "\tLocal unicast address(es):\n");
3965 ip6_print_addrs (vm, local_scope);
3966 vec_free (local_scope);
3969 if (vec_len (global_scope))
3971 vlib_cli_output (vm, "\tGlobal unicast address(es):\n");
3972 ip6_print_addrs (vm, global_scope);
3973 vec_free (global_scope);
3976 if (vec_len (unknown_scope))
3978 vlib_cli_output (vm, "\tOther-scope address(es):\n");
3979 ip6_print_addrs (vm, unknown_scope);
3980 vec_free (unknown_scope);
3983 vlib_cli_output (vm, "\tLink-local address(es):\n");
3984 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
3985 &radv_info->link_local_address);
3987 vlib_cli_output (vm, "\tJoined group address(es):\n");
3988 ip6_mldp_group_t *m;
3990 pool_foreach (m, radv_info->mldp_group_pool,
3992 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
3997 vlib_cli_output (vm, "\tAdvertised Prefixes:\n");
3998 ip6_radv_prefix_t *p;
4000 pool_foreach (p, radv_info->adv_prefixes_pool,
4002 vlib_cli_output (vm, "\t\tprefix %U, length %d\n",
4003 format_ip6_address, &p->prefix, p->prefix_len);
4007 vlib_cli_output (vm, "\tMTU is %d\n", radv_info->adv_link_mtu);
4008 vlib_cli_output (vm, "\tICMP error messages are unlimited\n");
4009 vlib_cli_output (vm, "\tICMP redirects are disabled\n");
4010 vlib_cli_output (vm, "\tICMP unreachables are not sent\n");
4011 vlib_cli_output (vm, "\tND DAD is disabled\n");
4012 //vlib_cli_output (vm, "\tND reachable time is %d milliseconds\n",);
4013 vlib_cli_output (vm, "\tND advertised reachable time is %d\n",
4014 radv_info->adv_neighbor_reachable_time_in_msec);
4015 vlib_cli_output (vm,
4016 "\tND advertised retransmit interval is %d (msec)\n",
4018 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
4020 u32 ra_interval = radv_info->max_radv_interval;
4021 u32 ra_interval_min = radv_info->min_radv_interval;
4022 vlib_cli_output (vm,
4023 "\tND router advertisements are sent every %d seconds (min interval is %d)\n",
4024 ra_interval, ra_interval_min);
4025 vlib_cli_output (vm,
4026 "\tND router advertisements live for %d seconds\n",
4027 radv_info->adv_router_lifetime_in_sec);
4028 vlib_cli_output (vm,
4029 "\tHosts %s stateless autoconfig for addresses\n",
4030 (radv_info->adv_managed_flag) ? "use" :
4032 vlib_cli_output (vm, "\tND router advertisements sent %d\n",
4033 radv_info->n_advertisements_sent);
4034 vlib_cli_output (vm, "\tND router solicitations received %d\n",
4035 radv_info->n_solicitations_rcvd);
4036 vlib_cli_output (vm, "\tND router solicitations dropped %d\n",
4037 radv_info->n_solicitations_dropped);
4041 error = clib_error_return (0, "IPv6 not enabled on interface",
4042 format_unformat_error, input);
4050 * This command is used to display various IPv6 attributes on a given
4054 * Example of how to display IPv6 settings:
4055 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
4056 * GigabitEthernet2/0/0 is admin up
4057 * Link-local address(es):
4059 * Joined group address(es):
4064 * Advertised Prefixes:
4065 * prefix fe80::fe:28ff:fe9c:75b3, length 64
4067 * ICMP error messages are unlimited
4068 * ICMP redirects are disabled
4069 * ICMP unreachables are not sent
4070 * ND DAD is disabled
4071 * ND advertised reachable time is 0
4072 * ND advertised retransmit interval is 0 (msec)
4073 * ND router advertisements are sent every 200 seconds (min interval is 150)
4074 * ND router advertisements live for 600 seconds
4075 * Hosts use stateless autoconfig for addresses
4076 * ND router advertisements sent 19336
4077 * ND router solicitations received 0
4078 * ND router solicitations dropped 0
4080 * Example of output if IPv6 is not enabled on the interface:
4081 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
4082 * show ip6 interface: IPv6 not enabled on interface
4086 VLIB_CLI_COMMAND (show_ip6_interface_command, static) =
4088 .path = "show ip6 interface",
4089 .function = show_ip6_interface_cmd,
4090 .short_help = "show ip6 interface <interface>",
4095 disable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
4097 clib_error_t *error = 0;
4098 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4101 /* look up the radv_t information for this interface */
4102 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
4104 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4106 /* if not created - do nothing */
4109 ip6_radv_t *radv_info;
4111 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4113 /* check radv_info ref count for other ip6 addresses on this interface */
4114 /* This implicitly excludes the link local address */
4115 if (radv_info->ref_count == 0)
4117 /* essentially "disables" ipv6 on this interface */
4118 ip6_ll_prefix_t ilp = {
4119 .ilp_addr = radv_info->link_local_address,
4120 .ilp_sw_if_index = sw_if_index,
4122 ip6_ll_table_entry_delete (&ilp);
4123 ip6_sw_interface_enable_disable (sw_if_index, 0);
4124 ip6_mfib_interface_enable_disable (sw_if_index, 0);
4125 ip6_neighbor_sw_interface_add_del (vnet_get_main (), sw_if_index,
4133 ip6_interface_enabled (vlib_main_t * vm, u32 sw_if_index)
4135 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4138 /* look up the radv_t information for this interface */
4139 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
4142 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4148 enable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
4150 clib_error_t *error = 0;
4151 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4155 /* look up the radv_t information for this interface */
4156 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
4159 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4161 /* if not created yet */
4164 vnet_main_t *vnm = vnet_get_main ();
4165 vnet_sw_interface_t *sw_if0;
4167 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
4168 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
4170 ethernet_interface_t *eth_if0;
4173 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
4176 /* create radv_info. for this interface. This holds all the info needed for router adverts */
4178 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, is_add);
4182 ip6_radv_t *radv_info;
4183 ip6_address_t link_local_address;
4185 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4187 ip6_link_local_address_from_ethernet_mac_address
4188 (&link_local_address, eth_if0->address);
4190 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index);
4191 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_SUB ||
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,
5043 ip6_set_reserved_multicast_address (&h->ip.dst_address,
5044 IP6_MULTICAST_SCOPE_link_local,
5045 IP6_MULTICAST_GROUP_ID_all_hosts);
5046 h->ip.src_address = ip6_addr[0];
5047 h->neighbor.icmp.type = ICMP6_neighbor_advertisement;
5048 h->neighbor.target_address = ip6_addr[0];
5049 h->neighbor.advertisement_flags = clib_host_to_net_u32
5050 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
5051 clib_memcpy (h->link_layer_option.ethernet_address,
5052 hi->hw_address, vec_len (hi->hw_address));
5053 h->neighbor.icmp.checksum =
5054 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
5055 ASSERT (bogus_length == 0);
5057 /* Setup MAC header with IP6 Etype and mcast DMAC */
5058 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
5059 ip6_multicast_ethernet_address (dst_address,
5060 IP6_MULTICAST_GROUP_ID_all_hosts);
5062 ethernet_build_rewrite (vnm, sw_if_index, VNET_LINK_IP6, dst_address);
5063 rewrite_len = vec_len (rewrite);
5064 vlib_buffer_advance (b, -rewrite_len);
5065 ethernet_header_t *e = vlib_buffer_get_current (b);
5066 clib_memcpy (e->dst_address, rewrite, rewrite_len);
5069 /* Send unsolicited ND advertisement packet out the specified interface */
5070 vnet_buffer (b)->sw_if_index[VLIB_RX] =
5071 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
5072 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
5073 u32 *to_next = vlib_frame_vector_args (f);
5076 vlib_put_frame_to_node (vm, hi->output_node_index, f);
5081 * fd.io coding-style-patch-verification: ON
5084 * eval: (c-set-style "gnu")