2 * ip/ip6_neighbor.c: IP6 neighbor handling
4 * Copyright (c) 2010 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
18 #include <vnet/ip/ip.h>
19 #include <vnet/ip/ip6_neighbor.h>
20 #include <vnet/ethernet/ethernet.h>
21 #include <vppinfra/mhash.h>
22 #include <vnet/adj/adj.h>
23 #include <vnet/adj/adj_mcast.h>
24 #include <vnet/fib/fib_table.h>
25 #include <vnet/fib/ip6_fib.h>
26 #include <vnet/mfib/ip6_mfib.h>
27 #include <vnet/ip/ip6_ll_table.h>
31 * @brief IPv6 Neighbor Adjacency and Neighbor Discovery.
33 * The files contains the API and CLI code for managing IPv6 neighbor
34 * adjacency tables and neighbor discovery logic.
37 /* can't use sizeof link_layer_address, that's 8 */
38 #define ETHER_MAC_ADDR_LEN 6
40 /* advertised prefix option */
43 /* basic advertised information */
47 int adv_autonomous_flag;
48 u32 adv_valid_lifetime_in_secs;
49 u32 adv_pref_lifetime_in_secs;
51 /* advertised values are computed from these times if decrementing */
52 f64 valid_lifetime_expires;
53 f64 pref_lifetime_expires;
55 /* local information */
57 int deprecated_prefix_flag;
58 int decrement_lifetime_flag;
60 #define MIN_ADV_VALID_LIFETIME 7203 /* seconds */
61 #define DEF_ADV_VALID_LIFETIME 2592000
62 #define DEF_ADV_PREF_LIFETIME 604800
64 /* extensions are added here, mobile, DNS etc.. */
70 /* group information */
72 ip6_address_t mcast_address;
74 ip6_address_t *mcast_source_address_pool;
77 /* configured router advertisement information per ipv6 interface */
81 /* advertised config information, zero means unspecified */
85 u16 adv_router_lifetime_in_sec;
86 u32 adv_neighbor_reachable_time_in_msec;
87 u32 adv_time_in_msec_between_retransmitted_neighbor_solicitations;
92 /* source link layer option */
93 u8 link_layer_address[8];
94 u8 link_layer_addr_len;
97 ip6_radv_prefix_t *adv_prefixes_pool;
99 /* Hash table mapping address to index in interface advertised prefix pool. */
100 mhash_t address_to_prefix_index;
102 /* MLDP group information */
103 ip6_mldp_group_t *mldp_group_pool;
105 /* Hash table mapping address to index in mldp address pool. */
106 mhash_t address_to_mldp_index;
108 /* local information */
110 int send_radv; /* radv on/off on this interface - set by config */
111 int cease_radv; /* we are ceasing to send - set byf config */
113 int adv_link_layer_address;
115 int failed_device_check;
116 int all_routers_mcast;
120 adj_index_t mcast_adj_index;
122 /* timing information */
123 #define DEF_MAX_RADV_INTERVAL 200
124 #define DEF_MIN_RADV_INTERVAL .75 * DEF_MAX_RADV_INTERVAL
125 #define DEF_CURR_HOP_LIMIT 64
126 #define DEF_DEF_RTR_LIFETIME 3 * DEF_MAX_RADV_INTERVAL
127 #define MAX_DEF_RTR_LIFETIME 9000
129 #define MAX_INITIAL_RTR_ADVERT_INTERVAL 16 /* seconds */
130 #define MAX_INITIAL_RTR_ADVERTISEMENTS 3 /*transmissions */
131 #define MIN_DELAY_BETWEEN_RAS 3 /* seconds */
132 #define MAX_DELAY_BETWEEN_RAS 1800 /* seconds */
133 #define MAX_RA_DELAY_TIME .5 /* seconds */
135 f64 max_radv_interval;
136 f64 min_radv_interval;
137 f64 min_delay_between_radv;
138 f64 max_delay_between_radv;
139 f64 max_rtr_default_lifetime;
142 f64 last_multicast_time;
143 f64 next_multicast_time;
146 u32 initial_adverts_count;
147 f64 initial_adverts_interval;
148 u32 initial_adverts_sent;
151 u32 n_advertisements_sent;
152 u32 n_solicitations_rcvd;
153 u32 n_solicitations_dropped;
155 /* Link local address to use (defaults to underlying physical for logical interfaces */
156 ip6_address_t link_local_address;
158 /* router solicitations sending state */
159 u8 keep_sending_rs; /* when true then next fields are valid */
160 icmp6_send_router_solicitation_params_t params;
165 vlib_buffer_t *buffer;
174 /* Used for nd event notification only */
177 } pending_resolution_t;
182 /* Hash tables mapping name to opcode. */
183 uword *opcode_by_name;
185 /* lite beer "glean" adjacency handling */
186 mhash_t pending_resolutions_by_address;
187 pending_resolution_t *pending_resolutions;
189 /* Mac address change notification */
190 mhash_t mac_changes_by_address;
191 pending_resolution_t *mac_changes;
193 u32 *neighbor_input_next_index_by_hw_if_index;
195 ip6_neighbor_t *neighbor_pool;
197 mhash_t neighbor_index_by_key;
199 u32 *if_radv_pool_index_by_sw_if_index;
201 ip6_radv_t *if_radv_pool;
203 /* Neighbor attack mitigation */
204 u32 limit_neighbor_cache_size;
205 u32 neighbor_delete_rotor;
207 /* Wildcard nd report publisher */
208 uword wc_ip6_nd_publisher_node;
209 uword wc_ip6_nd_publisher_et;
211 /* Router advertisement report publisher */
212 uword ip6_ra_publisher_node;
213 uword ip6_ra_publisher_et;
214 } ip6_neighbor_main_t;
216 /* ipv6 neighbor discovery - timer/event types */
220 } ip6_icmp_neighbor_discovery_event_type_t;
230 } ip6_icmp_neighbor_discovery_event_data_t;
232 static ip6_neighbor_main_t ip6_neighbor_main;
233 static ip6_address_t ip6a_zero; /* ip6 address 0 */
235 static void wc_nd_signal_report (wc_nd_report_t * r);
236 static void ra_signal_report (ra_report_t * r);
239 * @brief publish wildcard arp event
240 * @param sw_if_index The interface on which the ARP entires are acted
243 vnet_nd_wc_publish (u32 sw_if_index, u8 * mac, ip6_address_t * ip6)
246 .sw_if_index = sw_if_index,
249 memcpy (r.mac, mac, sizeof r.mac);
251 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
252 vl_api_rpc_call_main_thread (wc_nd_signal_report, (u8 *) & r, sizeof r);
257 wc_nd_signal_report (wc_nd_report_t * r)
259 vlib_main_t *vm = vlib_get_main ();
260 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
261 uword ni = nm->wc_ip6_nd_publisher_node;
262 uword et = nm->wc_ip6_nd_publisher_et;
264 if (ni == (uword) ~ 0)
267 vlib_process_signal_event_data (vm, ni, et, 1, sizeof *q);
273 wc_nd_set_publisher_node (uword node_index, uword event_type)
275 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
276 nm->wc_ip6_nd_publisher_node = node_index;
277 nm->wc_ip6_nd_publisher_et = event_type;
281 ra_publish (ra_report_t * r)
283 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
284 vl_api_rpc_call_main_thread (ra_signal_report, (u8 *) r, sizeof *r);
289 ra_signal_report (ra_report_t * r)
291 vlib_main_t *vm = vlib_get_main ();
292 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
293 uword ni = nm->ip6_ra_publisher_node;
294 uword et = nm->ip6_ra_publisher_et;
296 if (ni == (uword) ~ 0)
298 ra_report_t *q = vlib_process_signal_event_data (vm, ni, et, 1, sizeof *q);
304 ra_set_publisher_node (uword node_index, uword event_type)
306 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
307 nm->ip6_ra_publisher_node = node_index;
308 nm->ip6_ra_publisher_et = event_type;
312 format_ip6_neighbor_ip6_entry (u8 * s, va_list * va)
314 vlib_main_t *vm = va_arg (*va, vlib_main_t *);
315 ip6_neighbor_t *n = va_arg (*va, ip6_neighbor_t *);
316 vnet_main_t *vnm = vnet_get_main ();
317 vnet_sw_interface_t *si;
321 return format (s, "%=12s%=25s%=6s%=20s%=40s", "Time", "Address", "Flags",
322 "Link layer", "Interface");
324 if (n->flags & IP6_NEIGHBOR_FLAG_DYNAMIC)
325 flags = format (flags, "D");
327 if (n->flags & IP6_NEIGHBOR_FLAG_STATIC)
328 flags = format (flags, "S");
330 if (n->flags & IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY)
331 flags = format (flags, "N");
333 si = vnet_get_sw_interface (vnm, n->key.sw_if_index);
334 s = format (s, "%=12U%=25U%=6s%=20U%=40U",
335 format_vlib_cpu_time, vm, n->cpu_time_last_updated,
336 format_ip6_address, &n->key.ip6_address,
337 flags ? (char *) flags : "",
338 format_ethernet_address, n->link_layer_address,
339 format_vnet_sw_interface_name, vnm, si);
346 ip6_neighbor_adj_fib_remove (ip6_neighbor_t * n, u32 fib_index)
348 if (FIB_NODE_INDEX_INVALID != n->fib_entry_index)
350 if (ip6_address_is_link_local_unicast (&n->key.ip6_address))
352 ip6_ll_prefix_t pfx = {
353 .ilp_addr = n->key.ip6_address,
354 .ilp_sw_if_index = n->key.sw_if_index,
356 ip6_ll_table_entry_delete (&pfx);
362 .fp_proto = FIB_PROTOCOL_IP6,
363 .fp_addr.ip6 = n->key.ip6_address,
365 fib_table_entry_path_remove (fib_index,
370 n->key.sw_if_index, ~0,
371 1, FIB_ROUTE_PATH_FLAG_NONE);
376 static clib_error_t *
377 ip6_neighbor_sw_interface_up_down (vnet_main_t * vnm,
378 u32 sw_if_index, u32 flags)
380 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
383 if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
385 u32 i, *to_delete = 0;
388 pool_foreach (n, nm->neighbor_pool,
390 if (n->key.sw_if_index == sw_if_index)
391 vec_add1 (to_delete, n - nm->neighbor_pool);
395 for (i = 0; i < vec_len (to_delete); i++)
397 n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
398 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
399 ip6_neighbor_adj_fib_remove (n,
400 ip6_fib_table_get_index_for_sw_if_index
401 (n->key.sw_if_index));
402 pool_put (nm->neighbor_pool, n);
404 vec_free (to_delete);
410 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_neighbor_sw_interface_up_down);
413 unset_random_neighbor_entry (void)
415 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
416 vnet_main_t *vnm = vnet_get_main ();
417 vlib_main_t *vm = vnm->vlib_main;
421 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
422 nm->neighbor_delete_rotor = index;
424 /* Try again from elt 0, could happen if an intfc goes down */
427 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
428 nm->neighbor_delete_rotor = index;
431 /* Nothing left in the pool */
435 e = pool_elt_at_index (nm->neighbor_pool, index);
437 vnet_unset_ip6_ethernet_neighbor (vm, e->key.sw_if_index,
439 e->link_layer_address,
448 u8 link_layer_address[6];
451 } ip6_neighbor_set_unset_rpc_args_t;
453 static void ip6_neighbor_set_unset_rpc_callback
454 (ip6_neighbor_set_unset_rpc_args_t * a);
456 static void set_unset_ip6_neighbor_rpc
459 ip6_address_t * a, u8 * link_layer_address, int is_add, int is_static,
462 ip6_neighbor_set_unset_rpc_args_t args;
463 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
465 args.sw_if_index = sw_if_index;
466 args.is_add = is_add;
467 args.is_static = is_static;
468 args.is_no_fib_entry = is_no_fib_entry;
469 clib_memcpy (&args.addr, a, sizeof (*a));
470 if (NULL != link_layer_address)
471 clib_memcpy (args.link_layer_address, link_layer_address, 6);
473 vl_api_rpc_call_main_thread (ip6_neighbor_set_unset_rpc_callback,
474 (u8 *) & args, sizeof (args));
478 ip6_nbr_probe (ip_adjacency_t * adj)
480 icmp6_neighbor_solicitation_header_t *h;
481 vnet_main_t *vnm = vnet_get_main ();
482 ip6_main_t *im = &ip6_main;
483 ip_interface_address_t *ia;
484 ip6_address_t *dst, *src;
485 vnet_hw_interface_t *hi;
486 vnet_sw_interface_t *si;
492 vm = vlib_get_main ();
494 si = vnet_get_sw_interface (vnm, adj->rewrite_header.sw_if_index);
495 dst = &adj->sub_type.nbr.next_hop.ip6;
497 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
501 src = ip6_interface_address_matching_destination (im, dst,
509 h = vlib_packet_template_get_packet (vm,
510 &im->discover_neighbor_packet_template,
513 hi = vnet_get_sup_hw_interface (vnm, adj->rewrite_header.sw_if_index);
515 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
516 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
517 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
518 h->ip.src_address = src[0];
519 h->neighbor.target_address = dst[0];
521 clib_memcpy (h->link_layer_option.ethernet_address,
522 hi->hw_address, vec_len (hi->hw_address));
524 h->neighbor.icmp.checksum =
525 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
526 ASSERT (bogus_length == 0);
528 b = vlib_get_buffer (vm, bi);
529 vnet_buffer (b)->sw_if_index[VLIB_RX] =
530 vnet_buffer (b)->sw_if_index[VLIB_TX] = adj->rewrite_header.sw_if_index;
532 /* Add encapsulation string for software interface (e.g. ethernet header). */
533 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
534 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
537 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
538 u32 *to_next = vlib_frame_vector_args (f);
541 vlib_put_frame_to_node (vm, hi->output_node_index, f);
546 ip6_nd_mk_complete (adj_index_t ai, ip6_neighbor_t * nbr)
548 adj_nbr_update_rewrite (ai, ADJ_NBR_REWRITE_FLAG_COMPLETE,
549 ethernet_build_rewrite (vnet_get_main (),
550 nbr->key.sw_if_index,
551 adj_get_link_type (ai),
552 nbr->link_layer_address));
556 ip6_nd_mk_incomplete (adj_index_t ai)
558 ip_adjacency_t *adj = adj_get (ai);
560 adj_nbr_update_rewrite (ai,
561 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
562 ethernet_build_rewrite (vnet_get_main (),
565 adj_get_link_type (ai),
566 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
569 #define IP6_NBR_MK_KEY(k, sw_if_index, addr) \
571 k.sw_if_index = sw_if_index; \
572 k.ip6_address = *addr; \
576 static ip6_neighbor_t *
577 ip6_nd_find (u32 sw_if_index, const ip6_address_t * addr)
579 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
580 ip6_neighbor_t *n = NULL;
581 ip6_neighbor_key_t k;
584 IP6_NBR_MK_KEY (k, sw_if_index, addr);
586 p = mhash_get (&nm->neighbor_index_by_key, &k);
589 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
596 ip6_nd_mk_complete_walk (adj_index_t ai, void *ctx)
598 ip6_neighbor_t *nbr = ctx;
600 ip6_nd_mk_complete (ai, nbr);
602 return (ADJ_WALK_RC_CONTINUE);
606 ip6_nd_mk_incomplete_walk (adj_index_t ai, void *ctx)
608 ip6_nd_mk_incomplete (ai);
610 return (ADJ_WALK_RC_CONTINUE);
614 ip6_ethernet_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
621 nbr = ip6_nd_find (sw_if_index, &adj->sub_type.nbr.next_hop.ip6);
623 switch (adj->lookup_next_index)
625 case IP_LOOKUP_NEXT_GLEAN:
626 adj_glean_update_rewrite (ai);
628 case IP_LOOKUP_NEXT_ARP:
631 adj_nbr_walk_nh6 (sw_if_index, &nbr->key.ip6_address,
632 ip6_nd_mk_complete_walk, nbr);
637 * no matching ND entry.
638 * construct the rewrite required to for an ND packet, and stick
639 * that in the adj's pipe to smoke.
641 adj_nbr_update_rewrite (ai,
642 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
643 ethernet_build_rewrite (vnm,
646 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
649 * since the FIB has added this adj for a route, it makes sense it may
650 * want to forward traffic sometime soon. Let's send a speculative ND.
651 * just one. If we were to do periodically that wouldn't be bad either,
652 * but that's more code than i'm prepared to write at this time for
653 * relatively little reward.
658 case IP_LOOKUP_NEXT_MCAST:
661 * Construct a partial rewrite from the known ethernet mcast dest MAC
666 rewrite = ethernet_build_rewrite (vnm,
669 ethernet_ip6_mcast_dst_addr ());
672 * Complete the remaining fields of the adj's rewrite to direct the
673 * complete of the rewrite at switch time by copying in the IP
674 * dst address's bytes.
675 * Ofset is 2 bytes into the desintation address.
677 offset = vec_len (rewrite) - 2;
678 adj_mcast_update_rewrite (ai, rewrite, offset);
682 case IP_LOOKUP_NEXT_DROP:
683 case IP_LOOKUP_NEXT_PUNT:
684 case IP_LOOKUP_NEXT_LOCAL:
685 case IP_LOOKUP_NEXT_REWRITE:
686 case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
687 case IP_LOOKUP_NEXT_MIDCHAIN:
688 case IP_LOOKUP_NEXT_ICMP_ERROR:
689 case IP_LOOKUP_N_NEXT:
697 ip6_neighbor_adj_fib_add (ip6_neighbor_t * n, u32 fib_index)
699 if (ip6_address_is_link_local_unicast (&n->key.ip6_address))
701 ip6_ll_prefix_t pfx = {
702 .ilp_addr = n->key.ip6_address,
703 .ilp_sw_if_index = n->key.sw_if_index,
706 ip6_ll_table_entry_update (&pfx, FIB_ROUTE_PATH_FLAG_NONE);
712 .fp_proto = FIB_PROTOCOL_IP6,
713 .fp_addr.ip6 = n->key.ip6_address,
717 fib_table_entry_path_add (fib_index, &pfx, FIB_SOURCE_ADJ,
718 FIB_ENTRY_FLAG_ATTACHED,
719 DPO_PROTO_IP6, &pfx.fp_addr,
720 n->key.sw_if_index, ~0, 1, NULL,
721 FIB_ROUTE_PATH_FLAG_NONE);
726 vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
729 u8 * link_layer_address,
730 uword n_bytes_link_layer_address,
731 int is_static, int is_no_fib_entry)
733 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
734 ip6_neighbor_key_t k;
735 ip6_neighbor_t *n = 0;
736 int make_new_nd_cache_entry = 1;
739 pending_resolution_t *pr, *mc;
741 if (vlib_get_thread_index ())
743 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
744 1 /* set new neighbor */ , is_static,
749 k.sw_if_index = sw_if_index;
750 k.ip6_address = a[0];
753 p = mhash_get (&nm->neighbor_index_by_key, &k);
756 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
757 /* Refuse to over-write static neighbor entry. */
758 if (!is_static && (n->flags & IP6_NEIGHBOR_FLAG_STATIC))
760 make_new_nd_cache_entry = 0;
763 if (make_new_nd_cache_entry)
765 pool_get (nm->neighbor_pool, n);
766 mhash_set (&nm->neighbor_index_by_key, &k, n - nm->neighbor_pool,
769 n->fib_entry_index = FIB_NODE_INDEX_INVALID;
771 clib_memcpy (n->link_layer_address,
772 link_layer_address, n_bytes_link_layer_address);
775 * create the adj-fib. the entry in the FIB table for and to the peer.
777 if (!is_no_fib_entry)
779 ip6_neighbor_adj_fib_add
780 (n, ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index));
784 n->flags |= IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY;
790 * prevent a DoS attack from the data-plane that
791 * spams us with no-op updates to the MAC address
793 if (0 == memcmp (n->link_layer_address,
794 link_layer_address, n_bytes_link_layer_address))
795 goto check_customers;
797 clib_memcpy (n->link_layer_address,
798 link_layer_address, n_bytes_link_layer_address);
801 /* Update time stamp and flags. */
802 n->cpu_time_last_updated = clib_cpu_time_now ();
804 n->flags |= IP6_NEIGHBOR_FLAG_STATIC;
806 n->flags |= IP6_NEIGHBOR_FLAG_DYNAMIC;
808 adj_nbr_walk_nh6 (sw_if_index,
809 &n->key.ip6_address, ip6_nd_mk_complete_walk, n);
812 /* Customer(s) waiting for this address to be resolved? */
813 p = mhash_get (&nm->pending_resolutions_by_address, a);
818 while (next_index != (u32) ~ 0)
820 pr = pool_elt_at_index (nm->pending_resolutions, next_index);
821 vlib_process_signal_event (vm, pr->node_index,
822 pr->type_opaque, pr->data);
823 next_index = pr->next_index;
824 pool_put (nm->pending_resolutions, pr);
827 mhash_unset (&nm->pending_resolutions_by_address, a, 0);
830 /* Customer(s) requesting ND event for this address? */
831 p = mhash_get (&nm->mac_changes_by_address, a);
836 while (next_index != (u32) ~ 0)
838 int (*fp) (u32, u8 *, u32, ip6_address_t *);
840 mc = pool_elt_at_index (nm->mac_changes, next_index);
841 fp = mc->data_callback;
843 /* Call the user's data callback, return 1 to suppress dup events */
846 (*fp) (mc->data, link_layer_address, sw_if_index, &ip6a_zero);
848 * Signal the resolver process, as long as the user
849 * says they want to be notified
852 vlib_process_signal_event (vm, mc->node_index,
853 mc->type_opaque, mc->data);
854 next_index = mc->next_index;
862 vnet_unset_ip6_ethernet_neighbor (vlib_main_t * vm,
865 u8 * link_layer_address,
866 uword n_bytes_link_layer_address)
868 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
869 ip6_neighbor_key_t k;
874 if (vlib_get_thread_index ())
876 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
877 0 /* unset */ , 0, 0);
881 k.sw_if_index = sw_if_index;
882 k.ip6_address = a[0];
885 p = mhash_get (&nm->neighbor_index_by_key, &k);
892 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
893 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
895 adj_nbr_walk_nh6 (sw_if_index,
896 &n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL);
899 if (FIB_NODE_INDEX_INVALID != n->fib_entry_index)
903 .fp_proto = FIB_PROTOCOL_IP6,
904 .fp_addr.ip6 = n->key.ip6_address,
906 fib_table_entry_path_remove
907 (ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index),
911 &pfx.fp_addr, n->key.sw_if_index, ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
913 pool_put (nm->neighbor_pool, n);
919 static void ip6_neighbor_set_unset_rpc_callback
920 (ip6_neighbor_set_unset_rpc_args_t * a)
922 vlib_main_t *vm = vlib_get_main ();
924 vnet_set_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
925 a->link_layer_address, 6, a->is_static,
928 vnet_unset_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
929 a->link_layer_address, 6);
933 ip6_neighbor_sort (void *a1, void *a2)
935 vnet_main_t *vnm = vnet_get_main ();
936 ip6_neighbor_t *n1 = a1, *n2 = a2;
938 cmp = vnet_sw_interface_compare (vnm, n1->key.sw_if_index,
939 n2->key.sw_if_index);
941 cmp = ip6_address_compare (&n1->key.ip6_address, &n2->key.ip6_address);
946 ip6_neighbors_entries (u32 sw_if_index)
948 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
949 ip6_neighbor_t *n, *ns = 0;
952 pool_foreach (n, nm->neighbor_pool,
954 if (sw_if_index != ~0 && n->key.sw_if_index != sw_if_index)
961 vec_sort_with_function (ns, ip6_neighbor_sort);
965 static clib_error_t *
966 show_ip6_neighbors (vlib_main_t * vm,
967 unformat_input_t * input, vlib_cli_command_t * cmd)
969 vnet_main_t *vnm = vnet_get_main ();
970 ip6_neighbor_t *n, *ns;
971 clib_error_t *error = 0;
974 /* Filter entries by interface if given. */
976 (void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index);
978 ns = ip6_neighbors_entries (sw_if_index);
981 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, 0);
984 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, n);
993 * This command is used to display the adjacent IPv6 hosts found via
994 * neighbor discovery. Optionally, limit the output to the specified
998 * Example of how to display the IPv6 neighbor adjacency table:
999 * @cliexstart{show ip6 neighbors}
1000 * Time Address Flags Link layer Interface
1001 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
1002 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
1003 * 886.6654 ::1:1:c:0:9 S 02:fe:e4:45:27:5b GigabitEthernet3/0/0
1005 * Example of how to display the IPv6 neighbor adjacency table for given interface:
1006 * @cliexstart{show ip6 neighbors GigabitEthernet2/0/0}
1007 * Time Address Flags Link layer Interface
1008 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
1009 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
1013 VLIB_CLI_COMMAND (show_ip6_neighbors_command, static) = {
1014 .path = "show ip6 neighbors",
1015 .function = show_ip6_neighbors,
1016 .short_help = "show ip6 neighbors [<interface>]",
1020 static clib_error_t *
1021 set_ip6_neighbor (vlib_main_t * vm,
1022 unformat_input_t * input, vlib_cli_command_t * cmd)
1024 vnet_main_t *vnm = vnet_get_main ();
1030 int is_no_fib_entry = 0;
1033 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1035 /* intfc, ip6-address, mac-address */
1036 if (unformat (input, "%U %U %U",
1037 unformat_vnet_sw_interface, vnm, &sw_if_index,
1038 unformat_ip6_address, &addr,
1039 unformat_ethernet_address, mac_address))
1042 else if (unformat (input, "delete") || unformat (input, "del"))
1044 else if (unformat (input, "static"))
1046 else if (unformat (input, "no-fib-entry"))
1047 is_no_fib_entry = 1;
1053 return clib_error_return (0, "Missing interface, ip6 or hw address");
1056 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
1057 mac_address, sizeof (mac_address),
1058 is_static, is_no_fib_entry);
1060 vnet_unset_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
1061 mac_address, sizeof (mac_address));
1066 * This command is used to manually add an entry to the IPv6 neighbor
1067 * adjacency table. Optionally, the entry can be added as static. It is
1068 * also used to remove an entry from the table. Use the '<em>show ip6
1069 * neighbors</em>' command to display all learned and manually entered entries.
1072 * Example of how to add a static entry to the IPv6 neighbor adjacency table:
1073 * @cliexcmd{set ip6 neighbor GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b static}
1074 * Example of how to delete an entry from the IPv6 neighbor adjacency table:
1075 * @cliexcmd{set ip6 neighbor del GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b}
1078 VLIB_CLI_COMMAND (set_ip6_neighbor_command, static) =
1080 .path = "set ip6 neighbor",
1081 .function = set_ip6_neighbor,
1082 .short_help = "set ip6 neighbor [del] <interface> <ip6-address> <mac-address> [static]",
1088 ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP,
1089 ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY,
1090 ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
1091 } icmp6_neighbor_solicitation_or_advertisement_next_t;
1093 static_always_inline uword
1094 icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
1095 vlib_node_runtime_t * node,
1096 vlib_frame_t * frame,
1097 uword is_solicitation)
1099 vnet_main_t *vnm = vnet_get_main ();
1100 ip6_main_t *im = &ip6_main;
1101 uword n_packets = frame->n_vectors;
1102 u32 *from, *to_next;
1103 u32 n_left_from, n_left_to_next, next_index, n_advertisements_sent;
1104 icmp6_neighbor_discovery_option_type_t option_type;
1105 vlib_node_runtime_t *error_node =
1106 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1109 from = vlib_frame_vector_args (frame);
1110 n_left_from = n_packets;
1111 next_index = node->cached_next_index;
1113 if (node->flags & VLIB_NODE_FLAG_TRACE)
1114 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1116 sizeof (icmp6_input_trace_t));
1120 ? ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address
1121 : ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address);
1122 n_advertisements_sent = 0;
1124 while (n_left_from > 0)
1126 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1128 while (n_left_from > 0 && n_left_to_next > 0)
1132 icmp6_neighbor_solicitation_or_advertisement_header_t *h0;
1133 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1134 u32 bi0, options_len0, sw_if_index0, next0, error0;
1135 u32 ip6_sadd_link_local, ip6_sadd_unspecified;
1139 bi0 = to_next[0] = from[0];
1144 n_left_to_next -= 1;
1146 p0 = vlib_get_buffer (vm, bi0);
1147 ip0 = vlib_buffer_get_current (p0);
1148 h0 = ip6_next_header (ip0);
1150 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1152 error0 = ICMP6_ERROR_NONE;
1153 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1154 ip6_sadd_link_local =
1155 ip6_address_is_link_local_unicast (&ip0->src_address);
1156 ip6_sadd_unspecified =
1157 ip6_address_is_unspecified (&ip0->src_address);
1159 /* Check that source address is unspecified, link-local or else on-link. */
1160 if (!ip6_sadd_unspecified && !ip6_sadd_link_local)
1162 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1164 if (ADJ_INDEX_INVALID != src_adj_index0)
1166 ip_adjacency_t *adj0 = adj_get (src_adj_index0);
1168 /* Allow all realistic-looking rewrite adjacencies to pass */
1169 ni0 = adj0->lookup_next_index;
1170 is_rewrite0 = (ni0 >= IP_LOOKUP_NEXT_ARP) &&
1171 (ni0 < IP6_LOOKUP_N_NEXT);
1173 error0 = ((adj0->rewrite_header.sw_if_index != sw_if_index0
1176 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK
1182 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK;
1186 o0 = (void *) (h0 + 1);
1187 o0 = ((options_len0 == 8 && o0->header.type == option_type
1188 && o0->header.n_data_u64s == 1) ? o0 : 0);
1190 /* If src address unspecified or link local, donot learn neighbor MAC */
1191 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1192 !ip6_sadd_unspecified))
1194 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1195 if (nm->limit_neighbor_cache_size &&
1196 pool_elts (nm->neighbor_pool) >=
1197 nm->limit_neighbor_cache_size)
1198 unset_random_neighbor_entry ();
1199 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1202 &h0->target_address,
1203 o0->ethernet_address,
1204 sizeof (o0->ethernet_address),
1208 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1210 /* Check that target address is local to this router. */
1211 fib_node_index_t fei;
1215 ip6_fib_table_get_index_for_sw_if_index (sw_if_index0);
1217 if (~0 == fib_index)
1219 error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1223 if (ip6_address_is_link_local_unicast (&h0->target_address))
1225 fei = ip6_fib_table_lookup_exact_match
1226 (ip6_ll_fib_get (sw_if_index0),
1227 &h0->target_address, 128);
1231 fei = ip6_fib_table_lookup_exact_match (fib_index,
1232 &h0->target_address,
1236 if (FIB_NODE_INDEX_INVALID == fei)
1238 /* The target address is not in the FIB */
1240 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1244 if (FIB_ENTRY_FLAG_LOCAL &
1245 fib_entry_get_flags_for_source (fei,
1246 FIB_SOURCE_INTERFACE))
1248 /* It's an address that belongs to one of our interfaces
1252 if (fib_entry_is_sourced
1253 (fei, FIB_SOURCE_IP6_ND_PROXY) ||
1254 fib_entry_is_sourced (fei, FIB_SOURCE_IP6_ND))
1256 /* The address was added by IPv6 Proxy ND config.
1257 * We should only respond to these if the NS arrived on
1258 * the link that has a matching covering prefix */
1263 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1269 if (is_solicitation)
1270 next0 = (error0 != ICMP6_ERROR_NONE
1271 ? ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP
1272 : ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY);
1276 error0 = error0 == ICMP6_ERROR_NONE ?
1277 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_RX : error0;
1280 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1282 vnet_sw_interface_t *sw_if0;
1283 ethernet_interface_t *eth_if0;
1284 ethernet_header_t *eth0;
1286 /* dst address is either source address or the all-nodes mcast addr */
1287 if (!ip6_sadd_unspecified)
1288 ip0->dst_address = ip0->src_address;
1290 ip6_set_reserved_multicast_address (&ip0->dst_address,
1291 IP6_MULTICAST_SCOPE_link_local,
1292 IP6_MULTICAST_GROUP_ID_all_hosts);
1294 ip0->src_address = h0->target_address;
1295 ip0->hop_limit = 255;
1296 h0->icmp.type = ICMP6_neighbor_advertisement;
1298 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1299 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1301 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1304 clib_memcpy (o0->ethernet_address, eth_if0->address, 6);
1306 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
1309 h0->advertisement_flags = clib_host_to_net_u32
1310 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED
1311 | ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
1313 h0->icmp.checksum = 0;
1315 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1317 ASSERT (bogus_length == 0);
1319 /* Reuse current MAC header, copy SMAC to DMAC and
1320 * interface MAC to SMAC */
1321 vlib_buffer_advance (p0, -ethernet_buffer_header_size (p0));
1322 eth0 = vlib_buffer_get_current (p0);
1323 clib_memcpy (eth0->dst_address, eth0->src_address, 6);
1325 clib_memcpy (eth0->src_address, eth_if0->address, 6);
1327 /* Setup input and output sw_if_index for packet */
1328 ASSERT (vnet_buffer (p0)->sw_if_index[VLIB_RX] == sw_if_index0);
1329 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1330 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1331 vnet_main.local_interface_sw_if_index;
1333 n_advertisements_sent++;
1336 p0->error = error_node->errors[error0];
1338 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1339 to_next, n_left_to_next,
1343 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1346 /* Account for advertisements sent. */
1347 vlib_error_count (vm, error_node->node_index,
1348 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX,
1349 n_advertisements_sent);
1351 return frame->n_vectors;
1354 /* for "syslogging" - use elog for now */
1355 #define foreach_log_level \
1356 _ (DEBUG, "DEBUG") \
1357 _ (INFO, "INFORMATION") \
1358 _ (NOTICE, "NOTICE") \
1359 _ (WARNING, "WARNING") \
1361 _ (CRIT, "CRITICAL") \
1362 _ (ALERT, "ALERT") \
1363 _ (EMERG, "EMERGENCY")
1367 #define _(f,s) LOG_##f,
1372 static char *log_level_strings[] = {
1378 static int logmask = 1 << LOG_DEBUG;
1381 ip6_neighbor_syslog (vlib_main_t * vm, int priority, char *fmt, ...)
1383 /* just use elog for now */
1387 if ((priority > LOG_EMERG) || !(logmask & (1 << priority)))
1393 what = va_format (0, fmt, &va);
1395 ELOG_TYPE_DECLARE (e) =
1397 .format = "ip6 nd: (%s): %s",.format_args = "T4T4",};
1402 ed = ELOG_DATA (&vm->elog_main, e);
1403 ed->s[0] = elog_string (&vm->elog_main, log_level_strings[priority]);
1404 ed->s[1] = elog_string (&vm->elog_main, (char *) what);
1410 /* ipv6 neighbor discovery - router advertisements */
1413 ICMP6_ROUTER_SOLICITATION_NEXT_DROP,
1414 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW,
1415 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX,
1416 ICMP6_ROUTER_SOLICITATION_N_NEXT,
1417 } icmp6_router_solicitation_or_advertisement_next_t;
1419 static_always_inline uword
1420 icmp6_router_solicitation (vlib_main_t * vm,
1421 vlib_node_runtime_t * node, vlib_frame_t * frame)
1423 vnet_main_t *vnm = vnet_get_main ();
1424 ip6_main_t *im = &ip6_main;
1425 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1426 uword n_packets = frame->n_vectors;
1427 u32 *from, *to_next;
1428 u32 n_left_from, n_left_to_next, next_index;
1429 u32 n_advertisements_sent = 0;
1432 icmp6_neighbor_discovery_option_type_t option_type;
1434 vlib_node_runtime_t *error_node =
1435 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1437 from = vlib_frame_vector_args (frame);
1438 n_left_from = n_packets;
1439 next_index = node->cached_next_index;
1441 if (node->flags & VLIB_NODE_FLAG_TRACE)
1442 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1444 sizeof (icmp6_input_trace_t));
1446 /* source may append his LL address */
1447 option_type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1449 while (n_left_from > 0)
1451 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1453 while (n_left_from > 0 && n_left_to_next > 0)
1457 ip6_radv_t *radv_info = 0;
1459 icmp6_neighbor_discovery_header_t *h0;
1460 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1462 u32 bi0, options_len0, sw_if_index0, next0, error0;
1463 u32 is_solicitation = 1, is_dropped = 0;
1464 u32 is_unspecified, is_link_local;
1466 bi0 = to_next[0] = from[0];
1471 n_left_to_next -= 1;
1473 p0 = vlib_get_buffer (vm, bi0);
1474 ip0 = vlib_buffer_get_current (p0);
1475 h0 = ip6_next_header (ip0);
1477 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1478 is_unspecified = ip6_address_is_unspecified (&ip0->src_address);
1480 ip6_address_is_link_local_unicast (&ip0->src_address);
1482 error0 = ICMP6_ERROR_NONE;
1483 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1485 /* check if solicitation (not from nd_timer node) */
1486 if (ip6_address_is_unspecified (&ip0->dst_address))
1487 is_solicitation = 0;
1489 /* Check that source address is unspecified, link-local or else on-link. */
1490 if (!is_unspecified && !is_link_local)
1492 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1494 if (ADJ_INDEX_INVALID != src_adj_index0)
1496 ip_adjacency_t *adj0 = adj_get (src_adj_index0);
1498 error0 = (adj0->rewrite_header.sw_if_index != sw_if_index0
1500 ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK
1505 error0 = ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK;
1509 /* check for source LL option and process */
1510 o0 = (void *) (h0 + 1);
1511 o0 = ((options_len0 == 8
1512 && o0->header.type == option_type
1513 && o0->header.n_data_u64s == 1) ? o0 : 0);
1515 /* if src address unspecified IGNORE any options */
1516 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1517 !is_unspecified && !is_link_local))
1519 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1520 if (nm->limit_neighbor_cache_size &&
1521 pool_elts (nm->neighbor_pool) >=
1522 nm->limit_neighbor_cache_size)
1523 unset_random_neighbor_entry ();
1525 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1527 o0->ethernet_address,
1528 sizeof (o0->ethernet_address),
1532 /* default is to drop */
1533 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1535 if (error0 == ICMP6_ERROR_NONE)
1537 vnet_sw_interface_t *sw_if0;
1538 ethernet_interface_t *eth_if0;
1541 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1542 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1544 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1546 /* only support ethernet interface type for now */
1548 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1551 if (error0 == ICMP6_ERROR_NONE)
1555 /* adjust the sizeof the buffer to just include the ipv6 header */
1556 p0->current_length -=
1558 sizeof (icmp6_neighbor_discovery_header_t));
1560 /* look up the radv_t information for this interface */
1561 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) >
1565 nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1568 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1573 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1576 if (error0 == ICMP6_ERROR_NONE)
1578 f64 now = vlib_time_now (vm);
1580 /* for solicited adverts - need to rate limit */
1581 if (is_solicitation)
1583 if (0 != radv_info->last_radv_time &&
1584 (now - radv_info->last_radv_time) <
1585 MIN_DELAY_BETWEEN_RAS)
1588 radv_info->last_radv_time = now;
1592 icmp6_router_advertisement_header_t rh;
1594 rh.icmp.type = ICMP6_router_advertisement;
1596 rh.icmp.checksum = 0;
1598 rh.current_hop_limit = radv_info->curr_hop_limit;
1599 rh.router_lifetime_in_sec =
1600 clib_host_to_net_u16
1601 (radv_info->adv_router_lifetime_in_sec);
1603 time_in_msec_between_retransmitted_neighbor_solicitations
1605 clib_host_to_net_u32 (radv_info->
1606 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
1607 rh.neighbor_reachable_time_in_msec =
1608 clib_host_to_net_u32 (radv_info->
1609 adv_neighbor_reachable_time_in_msec);
1612 (radv_info->adv_managed_flag) ?
1613 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP :
1616 ((radv_info->adv_other_flag) ?
1617 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP :
1621 u16 payload_length =
1622 sizeof (icmp6_router_advertisement_header_t);
1624 vlib_buffer_add_data (vm,
1625 vlib_buffer_get_free_list_index
1626 (p0), bi0, (void *) &rh,
1628 (icmp6_router_advertisement_header_t));
1630 if (radv_info->adv_link_layer_address)
1632 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
1636 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1637 h.header.n_data_u64s = 1;
1639 /* copy ll address */
1640 clib_memcpy (&h.ethernet_address[0],
1641 eth_if0->address, 6);
1643 vlib_buffer_add_data (vm,
1644 vlib_buffer_get_free_list_index
1645 (p0), bi0, (void *) &h,
1647 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t));
1651 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t);
1654 /* add MTU option */
1655 if (radv_info->adv_link_mtu)
1657 icmp6_neighbor_discovery_mtu_option_t h;
1661 clib_host_to_net_u32 (radv_info->adv_link_mtu);
1662 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu;
1663 h.header.n_data_u64s = 1;
1666 sizeof (icmp6_neighbor_discovery_mtu_option_t);
1668 vlib_buffer_add_data (vm,
1669 vlib_buffer_get_free_list_index
1670 (p0), bi0, (void *) &h,
1672 (icmp6_neighbor_discovery_mtu_option_t));
1675 /* add advertised prefix options */
1676 ip6_radv_prefix_t *pr_info;
1679 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
1681 if(pr_info->enabled &&
1682 (!pr_info->decrement_lifetime_flag
1683 || (pr_info->pref_lifetime_expires >0)))
1685 /* advertise this prefix */
1686 icmp6_neighbor_discovery_prefix_information_option_t h;
1688 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information;
1689 h.header.n_data_u64s = (sizeof(icmp6_neighbor_discovery_prefix_information_option_t) >> 3);
1691 h.dst_address_length = pr_info->prefix_len;
1693 h.flags = (pr_info->adv_on_link_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_FLAG_ON_LINK : 0;
1694 h.flags |= (pr_info->adv_autonomous_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_AUTO : 0;
1696 if(radv_info->cease_radv && pr_info->deprecated_prefix_flag)
1698 h.valid_time = clib_host_to_net_u32(MIN_ADV_VALID_LIFETIME);
1699 h.preferred_time = 0;
1703 if(pr_info->decrement_lifetime_flag)
1705 pr_info->adv_valid_lifetime_in_secs = ((pr_info->valid_lifetime_expires > now)) ?
1706 (pr_info->valid_lifetime_expires - now) : 0;
1708 pr_info->adv_pref_lifetime_in_secs = ((pr_info->pref_lifetime_expires > now)) ?
1709 (pr_info->pref_lifetime_expires - now) : 0;
1712 h.valid_time = clib_host_to_net_u32(pr_info->adv_valid_lifetime_in_secs);
1713 h.preferred_time = clib_host_to_net_u32(pr_info->adv_pref_lifetime_in_secs) ;
1717 clib_memcpy(&h.dst_address, &pr_info->prefix, sizeof(ip6_address_t));
1719 payload_length += sizeof( icmp6_neighbor_discovery_prefix_information_option_t);
1721 vlib_buffer_add_data (vm,
1722 vlib_buffer_get_free_list_index (p0),
1724 (void *)&h, sizeof(icmp6_neighbor_discovery_prefix_information_option_t));
1730 /* add additional options before here */
1732 /* finish building the router advertisement... */
1733 if (!is_unspecified && radv_info->send_unicast)
1735 ip0->dst_address = ip0->src_address;
1739 /* target address is all-nodes mcast addr */
1740 ip6_set_reserved_multicast_address
1742 IP6_MULTICAST_SCOPE_link_local,
1743 IP6_MULTICAST_GROUP_ID_all_hosts);
1746 /* source address MUST be the link-local address */
1747 ip0->src_address = radv_info->link_local_address;
1749 ip0->hop_limit = 255;
1750 ip0->payload_length =
1751 clib_host_to_net_u16 (payload_length);
1753 icmp6_router_advertisement_header_t *rh0 =
1754 (icmp6_router_advertisement_header_t *) (ip0 + 1);
1755 rh0->icmp.checksum =
1756 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1758 ASSERT (bogus_length == 0);
1760 /* setup output if and adjacency */
1761 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1762 vnet_main.local_interface_sw_if_index;
1764 if (is_solicitation)
1766 ethernet_header_t *eth0;
1767 /* Reuse current MAC header, copy SMAC to DMAC and
1768 * interface MAC to SMAC */
1769 vlib_buffer_reset (p0);
1770 eth0 = vlib_buffer_get_current (p0);
1771 clib_memcpy (eth0->dst_address, eth0->src_address,
1773 clib_memcpy (eth0->src_address, eth_if0->address,
1776 is_dropped ? next0 :
1777 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX;
1778 vnet_buffer (p0)->sw_if_index[VLIB_TX] =
1783 adj_index0 = radv_info->mcast_adj_index;
1784 if (adj_index0 == 0)
1785 error0 = ICMP6_ERROR_DST_LOOKUP_MISS;
1789 is_dropped ? next0 :
1790 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW;
1791 vnet_buffer (p0)->ip.adj_index[VLIB_TX] =
1795 p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
1797 radv_info->n_solicitations_dropped += is_dropped;
1798 radv_info->n_solicitations_rcvd += is_solicitation;
1800 if ((error0 == ICMP6_ERROR_NONE) && !is_dropped)
1802 radv_info->n_advertisements_sent++;
1803 n_advertisements_sent++;
1809 p0->error = error_node->errors[error0];
1811 if (error0 != ICMP6_ERROR_NONE)
1812 vlib_error_count (vm, error_node->node_index, error0, 1);
1814 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1815 to_next, n_left_to_next,
1820 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1823 /* Account for router advertisements sent. */
1824 vlib_error_count (vm, error_node->node_index,
1825 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_TX,
1826 n_advertisements_sent);
1828 return frame->n_vectors;
1831 /* validate advertised info for consistancy (see RFC-4861 section 6.2.7) - log any inconsistencies, packet will always be dropped */
1832 static_always_inline uword
1833 icmp6_router_advertisement (vlib_main_t * vm,
1834 vlib_node_runtime_t * node, vlib_frame_t * frame)
1836 vnet_main_t *vnm = vnet_get_main ();
1837 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1838 uword n_packets = frame->n_vectors;
1839 u32 *from, *to_next;
1840 u32 n_left_from, n_left_to_next, next_index;
1841 u32 n_advertisements_rcvd = 0;
1843 vlib_node_runtime_t *error_node =
1844 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1846 from = vlib_frame_vector_args (frame);
1847 n_left_from = n_packets;
1848 next_index = node->cached_next_index;
1850 if (node->flags & VLIB_NODE_FLAG_TRACE)
1851 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1853 sizeof (icmp6_input_trace_t));
1855 while (n_left_from > 0)
1857 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1859 while (n_left_from > 0 && n_left_to_next > 0)
1863 ip6_radv_t *radv_info = 0;
1864 icmp6_router_advertisement_header_t *h0;
1865 u32 bi0, options_len0, sw_if_index0, next0, error0;
1867 bi0 = to_next[0] = from[0];
1872 n_left_to_next -= 1;
1874 p0 = vlib_get_buffer (vm, bi0);
1875 ip0 = vlib_buffer_get_current (p0);
1876 h0 = ip6_next_header (ip0);
1878 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1880 error0 = ICMP6_ERROR_NONE;
1881 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1883 /* Check that source address is link-local */
1884 error0 = (!ip6_address_is_link_local_unicast (&ip0->src_address)) ?
1885 ICMP6_ERROR_ROUTER_ADVERTISEMENT_SOURCE_NOT_LINK_LOCAL : error0;
1887 /* default is to drop */
1888 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1890 n_advertisements_rcvd++;
1892 if (error0 == ICMP6_ERROR_NONE)
1894 vnet_sw_interface_t *sw_if0;
1895 ethernet_interface_t *eth_if0;
1897 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1898 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1900 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1902 /* only support ethernet interface type for now */
1904 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1907 if (error0 == ICMP6_ERROR_NONE)
1911 /* look up the radv_t information for this interface */
1912 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) >
1916 nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1919 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1924 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1927 if (error0 == ICMP6_ERROR_NONE)
1929 radv_info->keep_sending_rs = 0;
1933 r.sw_if_index = sw_if_index0;
1934 memcpy (r.router_address, &ip0->src_address, 16);
1935 r.current_hop_limit = h0->current_hop_limit;
1936 r.flags = h0->flags;
1937 r.router_lifetime_in_sec =
1938 clib_net_to_host_u16 (h0->router_lifetime_in_sec);
1939 r.neighbor_reachable_time_in_msec =
1940 clib_net_to_host_u32
1941 (h0->neighbor_reachable_time_in_msec);
1942 r.time_in_msec_between_retransmitted_neighbor_solicitations = clib_net_to_host_u32 (h0->time_in_msec_between_retransmitted_neighbor_solicitations);
1945 /* validate advertised information */
1946 if ((h0->current_hop_limit && radv_info->curr_hop_limit)
1947 && (h0->current_hop_limit !=
1948 radv_info->curr_hop_limit))
1950 ip6_neighbor_syslog (vm, LOG_WARNING,
1951 "our AdvCurHopLimit on %U doesn't agree with %U",
1952 format_vnet_sw_if_index_name,
1959 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP)
1960 != radv_info->adv_managed_flag)
1962 ip6_neighbor_syslog (vm, LOG_WARNING,
1963 "our AdvManagedFlag on %U doesn't agree with %U",
1964 format_vnet_sw_if_index_name,
1971 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP)
1972 != radv_info->adv_other_flag)
1974 ip6_neighbor_syslog (vm, LOG_WARNING,
1975 "our AdvOtherConfigFlag on %U doesn't agree with %U",
1976 format_vnet_sw_if_index_name,
1983 time_in_msec_between_retransmitted_neighbor_solicitations
1985 adv_time_in_msec_between_retransmitted_neighbor_solicitations)
1987 time_in_msec_between_retransmitted_neighbor_solicitations
1989 clib_host_to_net_u32 (radv_info->
1990 adv_time_in_msec_between_retransmitted_neighbor_solicitations)))
1992 ip6_neighbor_syslog (vm, LOG_WARNING,
1993 "our AdvRetransTimer on %U doesn't agree with %U",
1994 format_vnet_sw_if_index_name,
2000 if ((h0->neighbor_reachable_time_in_msec &&
2001 radv_info->adv_neighbor_reachable_time_in_msec) &&
2002 (h0->neighbor_reachable_time_in_msec !=
2003 clib_host_to_net_u32
2004 (radv_info->adv_neighbor_reachable_time_in_msec)))
2006 ip6_neighbor_syslog (vm, LOG_WARNING,
2007 "our AdvReachableTime on %U doesn't agree with %U",
2008 format_vnet_sw_if_index_name,
2014 /* check for MTU or prefix options or .. */
2015 u8 *opt_hdr = (u8 *) (h0 + 1);
2016 while (options_len0 > 0)
2018 icmp6_neighbor_discovery_option_header_t *o0 =
2019 (icmp6_neighbor_discovery_option_header_t *)
2021 int opt_len = o0->n_data_u64s << 3;
2022 icmp6_neighbor_discovery_option_type_t option_type =
2025 if (options_len0 < 2)
2027 ip6_neighbor_syslog (vm, LOG_ERR,
2028 "malformed RA packet on %U from %U",
2029 format_vnet_sw_if_index_name,
2038 ip6_neighbor_syslog (vm, LOG_ERR,
2039 " zero length option in RA on %U from %U",
2040 format_vnet_sw_if_index_name,
2046 else if (opt_len > options_len0)
2048 ip6_neighbor_syslog (vm, LOG_ERR,
2049 "option length in RA packet greater than total length on %U from %U",
2050 format_vnet_sw_if_index_name,
2057 options_len0 -= opt_len;
2060 switch (option_type)
2062 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address:
2064 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
2066 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
2069 if (opt_len < sizeof (*h))
2072 memcpy (r.slla, h->ethernet_address, 6);
2076 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu:
2078 icmp6_neighbor_discovery_mtu_option_t *h =
2079 (icmp6_neighbor_discovery_mtu_option_t
2082 if (opt_len < sizeof (*h))
2085 r.mtu = clib_net_to_host_u32 (h->mtu);
2087 if ((h->mtu && radv_info->adv_link_mtu) &&
2089 clib_host_to_net_u32
2090 (radv_info->adv_link_mtu)))
2092 ip6_neighbor_syslog (vm, LOG_WARNING,
2093 "our AdvLinkMTU on %U doesn't agree with %U",
2094 format_vnet_sw_if_index_name,
2102 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information:
2104 icmp6_neighbor_discovery_prefix_information_option_t
2106 (icmp6_neighbor_discovery_prefix_information_option_t
2109 /* validate advertised prefix options */
2110 ip6_radv_prefix_t *pr_info;
2111 u32 preferred, valid;
2113 if (opt_len < sizeof (*h))
2116 vec_validate (r.prefixes,
2117 vec_len (r.prefixes));
2118 ra_report_prefix_info_t *prefix =
2119 vec_elt_at_index (r.prefixes,
2120 vec_len (r.prefixes) - 1);
2123 clib_net_to_host_u32 (h->preferred_time);
2124 valid = clib_net_to_host_u32 (h->valid_time);
2126 prefix->preferred_time = preferred;
2127 prefix->valid_time = valid;
2128 prefix->flags = h->flags & 0xc0;
2129 prefix->dst_address_length =
2130 h->dst_address_length;
2131 prefix->dst_address = h->dst_address;
2133 /* look for matching prefix - if we our advertising it, it better be consistant */
2135 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
2139 ip6_address_mask_from_width(&mask, pr_info->prefix_len);
2141 if(pr_info->enabled &&
2142 (pr_info->prefix_len == h->dst_address_length) &&
2143 ip6_address_is_equal_masked (&pr_info->prefix, &h->dst_address, &mask))
2146 if(!pr_info->decrement_lifetime_flag &&
2147 valid != pr_info->adv_valid_lifetime_in_secs)
2149 ip6_neighbor_syslog(vm, LOG_WARNING,
2150 "our ADV validlifetime on %U for %U does not agree with %U",
2151 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
2152 format_ip6_address, &h->dst_address);
2154 if(!pr_info->decrement_lifetime_flag &&
2155 preferred != pr_info->adv_pref_lifetime_in_secs)
2157 ip6_neighbor_syslog(vm, LOG_WARNING,
2158 "our ADV preferredlifetime on %U for %U does not agree with %U",
2159 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
2160 format_ip6_address, &h->dst_address);
2178 p0->error = error_node->errors[error0];
2180 if (error0 != ICMP6_ERROR_NONE)
2181 vlib_error_count (vm, error_node->node_index, error0, 1);
2183 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2184 to_next, n_left_to_next,
2188 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2191 /* Account for router advertisements received. */
2192 vlib_error_count (vm, error_node->node_index,
2193 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_RX,
2194 n_advertisements_rcvd);
2196 return frame->n_vectors;
2200 random_f64_from_to (f64 from, f64 to)
2202 static u32 seed = 0;
2203 static u8 seed_set = 0;
2206 seed = random_default_seed ();
2209 return random_f64 (&seed) * (to - from) + from;
2213 get_mac_address (u32 sw_if_index, u8 * address)
2215 vnet_main_t *vnm = vnet_get_main ();
2216 vnet_hw_interface_t *hw_if = vnet_get_sup_hw_interface (vnm, sw_if_index);
2217 if (!hw_if->hw_address)
2219 clib_memcpy (address, hw_if->hw_address, 6);
2223 static inline vlib_buffer_t *
2224 create_buffer_for_rs (vlib_main_t * vm, ip6_radv_t * radv_info)
2228 vlib_buffer_free_list_t *fl;
2229 icmp6_router_solicitation_header_t *rh;
2234 sw_if_index = radv_info->sw_if_index;
2236 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
2238 clib_warning ("buffer allocation failure");
2242 p0 = vlib_get_buffer (vm, bi0);
2243 fl = vlib_buffer_get_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2244 vlib_buffer_init_for_free_list (p0, fl);
2245 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (p0);
2246 p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
2248 vnet_buffer (p0)->sw_if_index[VLIB_RX] = sw_if_index;
2249 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index;
2251 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
2253 rh = vlib_buffer_get_current (p0);
2254 p0->current_length = sizeof (*rh);
2256 rh->neighbor.icmp.type = ICMP6_router_solicitation;
2257 rh->neighbor.icmp.code = 0;
2258 rh->neighbor.icmp.checksum = 0;
2259 rh->neighbor.reserved_must_be_zero = 0;
2261 rh->link_layer_option.header.type =
2262 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2263 if (0 != get_mac_address (sw_if_index,
2264 rh->link_layer_option.ethernet_address))
2266 clib_warning ("interface with sw_if_index %u has no mac address",
2268 vlib_buffer_free (vm, &bi0, 1);
2271 rh->link_layer_option.header.n_data_u64s = 1;
2273 payload_length = sizeof (rh->neighbor) + sizeof (u64);
2275 rh->ip.ip_version_traffic_class_and_flow_label =
2276 clib_host_to_net_u32 (0x6 << 28);
2277 rh->ip.payload_length = clib_host_to_net_u16 (payload_length);
2278 rh->ip.protocol = IP_PROTOCOL_ICMP6;
2279 rh->ip.hop_limit = 255;
2280 rh->ip.src_address = radv_info->link_local_address;
2281 /* set address ff02::2 */
2282 rh->ip.dst_address.as_u64[0] = clib_host_to_net_u64 (0xff02L << 48);
2283 rh->ip.dst_address.as_u64[1] = clib_host_to_net_u64 (2);
2285 rh->neighbor.icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, p0,
2293 stop_sending_rs (vlib_main_t * vm, ip6_radv_t * ra)
2297 ra->keep_sending_rs = 0;
2300 bi0 = vlib_get_buffer_index (vm, ra->buffer);
2301 vlib_buffer_free (vm, &bi0, 1);
2307 check_send_rs (vlib_main_t * vm, ip6_radv_t * radv_info, f64 current_time,
2317 icmp6_send_router_solicitation_params_t *params;
2319 if (!radv_info->keep_sending_rs)
2322 params = &radv_info->params;
2324 if (radv_info->due_time > current_time)
2326 *due_time = radv_info->due_time;
2330 p0 = radv_info->buffer;
2332 next_index = ip6_rewrite_mcast_node.index;
2334 c0 = vlib_buffer_copy (vm, p0);
2335 ci0 = vlib_get_buffer_index (vm, c0);
2337 f = vlib_get_frame_to_node (vm, next_index);
2338 to_next = vlib_frame_vector_args (f);
2341 vlib_put_frame_to_node (vm, next_index, f);
2343 if (params->mrc != 0 && --radv_info->n_left == 0)
2344 stop_sending_rs (vm, radv_info);
2347 radv_info->sleep_interval =
2348 (2 + random_f64_from_to (-0.1, 0.1)) * radv_info->sleep_interval;
2349 if (radv_info->sleep_interval > params->mrt)
2350 radv_info->sleep_interval =
2351 (1 + random_f64_from_to (-0.1, 0.1)) * params->mrt;
2353 radv_info->due_time = current_time + radv_info->sleep_interval;
2355 if (params->mrd != 0
2356 && current_time > radv_info->start_time + params->mrd)
2357 stop_sending_rs (vm, radv_info);
2359 *due_time = radv_info->due_time;
2362 return radv_info->keep_sending_rs;
2366 send_rs_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
2369 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2370 ip6_radv_t *radv_info;
2371 uword *event_data = 0;
2372 f64 sleep_time = 1e9;
2379 vlib_process_wait_for_event_or_clock (vm, sleep_time);
2380 vlib_process_get_events (vm, &event_data);
2381 vec_reset_length (event_data);
2383 current_time = vlib_time_now (vm);
2386 due_time = current_time + 1e9;
2388 pool_foreach (radv_info, nm->if_radv_pool,
2390 if (check_send_rs (vm, radv_info, current_time, &dt)
2395 current_time = vlib_time_now (vm);
2397 while (due_time < current_time);
2399 sleep_time = due_time - current_time;
2406 VLIB_REGISTER_NODE (send_rs_process_node) = {
2407 .function = send_rs_process,
2408 .type = VLIB_NODE_TYPE_PROCESS,
2409 .name = "send-rs-process",
2414 icmp6_send_router_solicitation (vlib_main_t * vm, u32 sw_if_index, u8 stop,
2415 icmp6_send_router_solicitation_params_t *
2418 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2422 ASSERT (~0 != sw_if_index);
2424 rai = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2425 ra = pool_elt_at_index (nm->if_radv_pool, rai);
2428 stop_sending_rs (vm, ra);
2431 ra->keep_sending_rs = 1;
2432 ra->params = *params;
2433 ra->n_left = params->mrc;
2434 ra->start_time = vlib_time_now (vm);
2435 ra->sleep_interval = (1 + random_f64_from_to (-0.1, 0.1)) * params->irt;
2436 ra->due_time = 0; /* send first packet ASAP */
2437 ra->buffer = create_buffer_for_rs (vm, ra);
2439 ra->keep_sending_rs = 0;
2441 vlib_process_signal_event (vm, send_rs_process_node.index, 1, 0);
2446 * @brief Add a multicast Address to the advertised MLD set
2449 ip6_neighbor_add_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2451 ip6_mldp_group_t *mcast_group_info;
2454 /* lookup mldp info for this interface */
2455 p = mhash_get (&radv_info->address_to_mldp_index, addr);
2457 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2460 if (!mcast_group_info)
2464 pool_get (radv_info->mldp_group_pool, mcast_group_info);
2466 mi = mcast_group_info - radv_info->mldp_group_pool;
2467 mhash_set (&radv_info->address_to_mldp_index, addr, mi, /* old_value */
2470 mcast_group_info->type = 4;
2471 mcast_group_info->mcast_source_address_pool = 0;
2472 mcast_group_info->num_sources = 0;
2473 clib_memcpy (&mcast_group_info->mcast_address, addr,
2474 sizeof (ip6_address_t));
2479 * @brief Delete a multicast Address from the advertised MLD set
2482 ip6_neighbor_del_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2484 ip6_mldp_group_t *mcast_group_info;
2487 p = mhash_get (&radv_info->address_to_mldp_index, &addr);
2489 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2491 if (mcast_group_info)
2493 mhash_unset (&radv_info->address_to_mldp_index, &addr,
2495 pool_put (radv_info->mldp_group_pool, mcast_group_info);
2500 * @brief Add a multicast Address to the advertised MLD set
2503 ip6_neighbor_add_mld_grp (ip6_radv_t * a,
2504 ip6_multicast_address_scope_t scope,
2505 ip6_multicast_link_local_group_id_t group)
2509 ip6_set_reserved_multicast_address (&addr, scope, group);
2511 ip6_neighbor_add_mld_prefix (a, &addr);
2515 * @brief create and initialize router advertisement parameters with default
2516 * values for this intfc
2519 ip6_neighbor_sw_interface_add_del (vnet_main_t * vnm,
2520 u32 sw_if_index, u32 is_add)
2522 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2525 vnet_sw_interface_t *sw_if0;
2526 ethernet_interface_t *eth_if0 = 0;
2528 /* lookup radv container - ethernet interfaces only */
2529 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2530 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2531 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2536 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2538 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2542 a = pool_elt_at_index (nm->if_radv_pool, ri);
2546 ip6_radv_prefix_t *p;
2547 ip6_mldp_group_t *m;
2549 /* release the lock on the interface's mcast adj */
2550 adj_unlock (a->mcast_adj_index);
2552 /* clean up prefix and MDP pools */
2554 pool_flush(p, a->adv_prefixes_pool,
2556 mhash_unset (&a->address_to_prefix_index, &p->prefix, 0);
2558 pool_flush (m, a->mldp_group_pool,
2560 mhash_unset (&a->address_to_mldp_index, &m->mcast_address, 0);
2564 pool_free (a->mldp_group_pool);
2565 pool_free (a->adv_prefixes_pool);
2567 mhash_free (&a->address_to_prefix_index);
2568 mhash_free (&a->address_to_mldp_index);
2570 if (a->keep_sending_rs)
2571 a->keep_sending_rs = 0;
2573 pool_put (nm->if_radv_pool, a);
2574 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ~0;
2582 vnet_hw_interface_t *hw_if0;
2584 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index);
2586 pool_get (nm->if_radv_pool, a);
2588 ri = a - nm->if_radv_pool;
2589 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ri;
2591 /* initialize default values (most of which are zero) */
2592 memset (a, 0, sizeof (a[0]));
2594 a->sw_if_index = sw_if_index;
2595 a->max_radv_interval = DEF_MAX_RADV_INTERVAL;
2596 a->min_radv_interval = DEF_MIN_RADV_INTERVAL;
2597 a->curr_hop_limit = DEF_CURR_HOP_LIMIT;
2598 a->adv_router_lifetime_in_sec = DEF_DEF_RTR_LIFETIME;
2600 /* send ll address source address option */
2601 a->adv_link_layer_address = 1;
2603 a->min_delay_between_radv = MIN_DELAY_BETWEEN_RAS;
2604 a->max_delay_between_radv = MAX_DELAY_BETWEEN_RAS;
2605 a->max_rtr_default_lifetime = MAX_DEF_RTR_LIFETIME;
2606 a->seed = (u32) clib_cpu_time_now ();
2607 (void) random_u32 (&a->seed);
2608 a->randomizer = clib_cpu_time_now ();
2609 (void) random_u64 (&a->randomizer);
2611 a->initial_adverts_count = MAX_INITIAL_RTR_ADVERTISEMENTS;
2612 a->initial_adverts_sent = a->initial_adverts_count - 1;
2613 a->initial_adverts_interval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
2615 /* deafult is to send */
2618 /* fill in radv_info for this interface that will be needed later */
2619 a->adv_link_mtu = hw_if0->max_l3_packet_bytes[VLIB_RX];
2621 clib_memcpy (a->link_layer_address, eth_if0->address, 6);
2623 /* fill in default link-local address (this may be overridden) */
2624 ip6_link_local_address_from_ethernet_address
2625 (&a->link_local_address, eth_if0->address);
2627 mhash_init (&a->address_to_prefix_index, sizeof (uword),
2628 sizeof (ip6_address_t));
2629 mhash_init (&a->address_to_mldp_index, sizeof (uword),
2630 sizeof (ip6_address_t));
2632 a->mcast_adj_index = adj_mcast_add_or_lock (FIB_PROTOCOL_IP6,
2636 a->keep_sending_rs = 0;
2638 /* add multicast groups we will always be reporting */
2639 ip6_neighbor_add_mld_grp (a,
2640 IP6_MULTICAST_SCOPE_link_local,
2641 IP6_MULTICAST_GROUP_ID_all_hosts);
2642 ip6_neighbor_add_mld_grp (a,
2643 IP6_MULTICAST_SCOPE_link_local,
2644 IP6_MULTICAST_GROUP_ID_all_routers);
2645 ip6_neighbor_add_mld_grp (a,
2646 IP6_MULTICAST_SCOPE_link_local,
2647 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2653 /* send an mldpv2 report */
2655 ip6_neighbor_send_mldpv2_report (u32 sw_if_index)
2657 vnet_main_t *vnm = vnet_get_main ();
2658 vlib_main_t *vm = vnm->vlib_main;
2659 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2660 vnet_sw_interface_t *sw_if0;
2661 ethernet_interface_t *eth_if0;
2665 ip6_radv_t *radv_info;
2675 icmp6_multicast_listener_report_header_t *rh0;
2676 icmp6_multicast_listener_report_packet_t *rp0;
2678 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2679 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
2680 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2682 if (!eth_if0 || !vnet_sw_interface_is_admin_up (vnm, sw_if_index))
2685 /* look up the radv_t information for this interface */
2686 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2689 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2694 /* send report now - build a mldpv2 report packet */
2695 n_allocated = vlib_buffer_alloc_from_free_list (vm,
2698 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2699 if (PREDICT_FALSE (n_allocated == 0))
2701 clib_warning ("buffer allocation failure");
2705 b0 = vlib_get_buffer (vm, bo0);
2707 /* adjust the sizeof the buffer to just include the ipv6 header */
2708 b0->current_length = sizeof (icmp6_multicast_listener_report_packet_t);
2710 payload_length = sizeof (icmp6_multicast_listener_report_header_t);
2712 b0->error = ICMP6_ERROR_NONE;
2714 rp0 = vlib_buffer_get_current (b0);
2715 ip0 = (ip6_header_t *) & rp0->ip;
2716 rh0 = (icmp6_multicast_listener_report_header_t *) & rp0->report_hdr;
2718 memset (rp0, 0x0, sizeof (icmp6_multicast_listener_report_packet_t));
2720 ip0->ip_version_traffic_class_and_flow_label =
2721 clib_host_to_net_u32 (0x6 << 28);
2723 ip0->protocol = IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS;
2724 /* for DEBUG - vnet driver won't seem to emit router alerts */
2725 /* ip0->protocol = IP_PROTOCOL_ICMP6; */
2728 rh0->icmp.type = ICMP6_multicast_listener_report_v2;
2730 /* source address MUST be the link-local address */
2731 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2732 ip0->src_address = radv_info->link_local_address;
2734 /* destination is all mldpv2 routers */
2735 ip6_set_reserved_multicast_address (&ip0->dst_address,
2736 IP6_MULTICAST_SCOPE_link_local,
2737 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2739 /* add reports here */
2740 ip6_mldp_group_t *m;
2741 int num_addr_records = 0;
2742 icmp6_multicast_address_record_t rr;
2744 /* fill in the hop-by-hop extension header (router alert) info */
2745 rh0->ext_hdr.next_hdr = IP_PROTOCOL_ICMP6;
2746 rh0->ext_hdr.n_data_u64s = 0;
2748 rh0->alert.type = IP6_MLDP_ALERT_TYPE;
2750 rh0->alert.value = 0;
2755 rh0->icmp.checksum = 0;
2758 pool_foreach (m, radv_info->mldp_group_pool,
2761 rr.aux_data_len_u32s = 0;
2762 rr.num_sources = clib_host_to_net_u16 (m->num_sources);
2763 clib_memcpy(&rr.mcast_addr, &m->mcast_address, sizeof(ip6_address_t));
2767 vlib_buffer_add_data
2768 (vm, vlib_buffer_get_free_list_index (b0), bo0,
2769 (void *)&rr, sizeof(icmp6_multicast_address_record_t));
2771 payload_length += sizeof( icmp6_multicast_address_record_t);
2776 rh0->num_addr_records = clib_host_to_net_u16 (num_addr_records);
2778 /* update lengths */
2779 ip0->payload_length = clib_host_to_net_u16 (payload_length);
2781 rh0->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0,
2783 ASSERT (bogus_length == 0);
2786 * OK to override w/ no regard for actual FIB, because
2787 * ip6-rewrite only looks at the adjacency.
2789 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
2790 vnet_main.local_interface_sw_if_index;
2792 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
2793 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
2795 vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite-mcast");
2797 f = vlib_get_frame_to_node (vm, node->index);
2798 to_next = vlib_frame_vector_args (f);
2802 vlib_put_frame_to_node (vm, node->index, f);
2807 VLIB_REGISTER_NODE (ip6_icmp_router_solicitation_node,static) =
2809 .function = icmp6_router_solicitation,
2810 .name = "icmp6-router-solicitation",
2812 .vector_size = sizeof (u32),
2814 .format_trace = format_icmp6_input_trace,
2816 .n_next_nodes = ICMP6_ROUTER_SOLICITATION_N_NEXT,
2818 [ICMP6_ROUTER_SOLICITATION_NEXT_DROP] = "ip6-drop",
2819 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW] = "ip6-rewrite-mcast",
2820 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX] = "interface-output",
2825 /* send a RA or update the timer info etc.. */
2827 ip6_neighbor_process_timer_event (vlib_main_t * vm,
2828 vlib_node_runtime_t * node,
2829 vlib_frame_t * frame)
2831 vnet_main_t *vnm = vnet_get_main ();
2832 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2833 ip6_radv_t *radv_info;
2834 vlib_frame_t *f = 0;
2835 u32 n_this_frame = 0;
2836 u32 n_left_to_next = 0;
2839 icmp6_router_solicitation_header_t *h0;
2841 f64 now = vlib_time_now (vm);
2843 /* Interface ip6 radv info list */
2845 pool_foreach (radv_info, nm->if_radv_pool,
2847 if( !vnet_sw_interface_is_admin_up (vnm, radv_info->sw_if_index))
2849 radv_info->initial_adverts_sent = radv_info->initial_adverts_count-1;
2850 radv_info->next_multicast_time = now;
2851 radv_info->last_multicast_time = now;
2852 radv_info->last_radv_time = 0;
2853 radv_info->all_routers_mcast = 0;
2857 /* Make sure that we've joined the all-routers multicast group */
2858 if(!radv_info->all_routers_mcast)
2860 /* send MDLP_REPORT_EVENT message */
2861 ip6_neighbor_send_mldpv2_report(radv_info->sw_if_index);
2862 radv_info->all_routers_mcast = 1;
2865 /* is it time to send a multicast RA on this interface? */
2866 if(radv_info->send_radv && (now >= radv_info->next_multicast_time))
2871 f64 rfn = (radv_info->max_radv_interval - radv_info->min_radv_interval) *
2872 random_f64 (&radv_info->seed) + radv_info->min_radv_interval;
2874 /* multicast send - compute next multicast send time */
2875 if( radv_info->initial_adverts_sent > 0)
2877 radv_info->initial_adverts_sent--;
2878 if(rfn > radv_info-> initial_adverts_interval)
2879 rfn = radv_info-> initial_adverts_interval;
2881 /* check to see if we are ceasing to send */
2882 if( radv_info->initial_adverts_sent == 0)
2883 if(radv_info->cease_radv)
2884 radv_info->send_radv = 0;
2887 radv_info->next_multicast_time = rfn + now;
2888 radv_info->last_multicast_time = now;
2890 /* send advert now - build a "solicted" router advert with unspecified source address */
2891 n_allocated = vlib_buffer_alloc_from_free_list
2892 (vm, &bo0, n_to_alloc, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2894 if (PREDICT_FALSE(n_allocated == 0))
2896 clib_warning ("buffer allocation failure");
2899 b0 = vlib_get_buffer (vm, bo0);
2900 b0->current_length = sizeof( icmp6_router_solicitation_header_t);
2901 b0->error = ICMP6_ERROR_NONE;
2902 vnet_buffer (b0)->sw_if_index[VLIB_RX] = radv_info->sw_if_index;
2904 h0 = vlib_buffer_get_current (b0);
2906 memset (h0, 0, sizeof (icmp6_router_solicitation_header_t));
2908 h0->ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2909 h0->ip.payload_length = clib_host_to_net_u16 (sizeof (icmp6_router_solicitation_header_t)
2910 - STRUCT_OFFSET_OF (icmp6_router_solicitation_header_t, neighbor));
2911 h0->ip.protocol = IP_PROTOCOL_ICMP6;
2912 h0->ip.hop_limit = 255;
2914 /* set src/dst address as "unspecified" this marks this packet as internally generated rather than recieved */
2915 h0->ip.src_address.as_u64[0] = 0;
2916 h0->ip.src_address.as_u64[1] = 0;
2918 h0->ip.dst_address.as_u64[0] = 0;
2919 h0->ip.dst_address.as_u64[1] = 0;
2921 h0->neighbor.icmp.type = ICMP6_router_solicitation;
2923 if (PREDICT_FALSE(f == 0))
2925 f = vlib_get_frame_to_node (vm, ip6_icmp_router_solicitation_node.index);
2926 to_next = vlib_frame_vector_args (f);
2927 n_left_to_next = VLIB_FRAME_SIZE;
2936 if (PREDICT_FALSE(n_left_to_next == 0))
2938 f->n_vectors = n_this_frame;
2939 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2948 ASSERT (n_this_frame);
2949 f->n_vectors = n_this_frame;
2950 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2956 ip6_icmp_neighbor_discovery_event_process (vlib_main_t * vm,
2957 vlib_node_runtime_t * node,
2958 vlib_frame_t * frame)
2961 ip6_icmp_neighbor_discovery_event_data_t *event_data;
2963 /* init code here */
2967 vlib_process_wait_for_event_or_clock (vm, 1. /* seconds */ );
2969 event_data = vlib_process_get_event_data (vm, &event_type);
2973 /* No events found: timer expired. */
2974 /* process interface list and send RAs as appropriate, update timer info */
2975 ip6_neighbor_process_timer_event (vm, node, frame);
2982 case ICMP6_ND_EVENT_INIT:
2993 _vec_len (event_data) = 0;
2996 return frame->n_vectors;
3000 VLIB_REGISTER_NODE (ip6_icmp_router_advertisement_node,static) =
3002 .function = icmp6_router_advertisement,
3003 .name = "icmp6-router-advertisement",
3005 .vector_size = sizeof (u32),
3007 .format_trace = format_icmp6_input_trace,
3016 vlib_node_registration_t ip6_icmp_neighbor_discovery_event_node = {
3018 .function = ip6_icmp_neighbor_discovery_event_process,
3019 .name = "ip6-icmp-neighbor-discovery-event-process",
3020 .type = VLIB_NODE_TYPE_PROCESS,
3024 icmp6_neighbor_solicitation (vlib_main_t * vm,
3025 vlib_node_runtime_t * node, vlib_frame_t * frame)
3027 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
3028 /* is_solicitation */
3033 icmp6_neighbor_advertisement (vlib_main_t * vm,
3034 vlib_node_runtime_t * node,
3035 vlib_frame_t * frame)
3037 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
3038 /* is_solicitation */
3043 VLIB_REGISTER_NODE (ip6_icmp_neighbor_solicitation_node,static) =
3045 .function = icmp6_neighbor_solicitation,
3046 .name = "icmp6-neighbor-solicitation",
3048 .vector_size = sizeof (u32),
3050 .format_trace = format_icmp6_input_trace,
3052 .n_next_nodes = ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
3054 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP] = "ip6-drop",
3055 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY] = "interface-output",
3061 VLIB_REGISTER_NODE (ip6_icmp_neighbor_advertisement_node,static) =
3063 .function = icmp6_neighbor_advertisement,
3064 .name = "icmp6-neighbor-advertisement",
3066 .vector_size = sizeof (u32),
3068 .format_trace = format_icmp6_input_trace,
3079 IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
3080 IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX,
3081 IP6_DISCOVER_NEIGHBOR_N_NEXT,
3082 } ip6_discover_neighbor_next_t;
3086 IP6_DISCOVER_NEIGHBOR_ERROR_DROP,
3087 IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT,
3088 IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS,
3089 } ip6_discover_neighbor_error_t;
3092 ip6_discover_neighbor_inline (vlib_main_t * vm,
3093 vlib_node_runtime_t * node,
3094 vlib_frame_t * frame, int is_glean)
3096 vnet_main_t *vnm = vnet_get_main ();
3097 ip6_main_t *im = &ip6_main;
3098 ip_lookup_main_t *lm = &im->lookup_main;
3099 u32 *from, *to_next_drop;
3100 uword n_left_from, n_left_to_next_drop;
3101 static f64 time_last_seed_change = -1e100;
3102 static u32 hash_seeds[3];
3103 static uword hash_bitmap[256 / BITS (uword)];
3106 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3108 if (node->flags & VLIB_NODE_FLAG_TRACE)
3109 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
3111 time_now = vlib_time_now (vm);
3112 if (time_now - time_last_seed_change > 1e-3)
3115 u32 *r = clib_random_buffer_get_data (&vm->random_buffer,
3116 sizeof (hash_seeds));
3117 for (i = 0; i < ARRAY_LEN (hash_seeds); i++)
3118 hash_seeds[i] = r[i];
3120 /* Mark all hash keys as been not-seen before. */
3121 for (i = 0; i < ARRAY_LEN (hash_bitmap); i++)
3124 time_last_seed_change = time_now;
3127 from = vlib_frame_vector_args (frame);
3128 n_left_from = frame->n_vectors;
3130 while (n_left_from > 0)
3132 vlib_get_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
3133 to_next_drop, n_left_to_next_drop);
3135 while (n_left_from > 0 && n_left_to_next_drop > 0)
3139 u32 pi0, adj_index0, a0, b0, c0, m0, sw_if_index0, drop0;
3141 ip_adjacency_t *adj0;
3142 vnet_hw_interface_t *hw_if0;
3143 ip6_radv_t *radv_info;
3148 p0 = vlib_get_buffer (vm, pi0);
3150 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
3152 ip0 = vlib_buffer_get_current (p0);
3154 adj0 = adj_get (adj_index0);
3158 ip0->dst_address.as_u64[0] =
3159 adj0->sub_type.nbr.next_hop.ip6.as_u64[0];
3160 ip0->dst_address.as_u64[1] =
3161 adj0->sub_type.nbr.next_hop.ip6.as_u64[1];
3168 sw_if_index0 = adj0->rewrite_header.sw_if_index;
3169 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
3172 b0 ^= ip0->dst_address.as_u32[0];
3173 c0 ^= ip0->dst_address.as_u32[1];
3175 hash_v3_mix32 (a0, b0, c0);
3177 b0 ^= ip0->dst_address.as_u32[2];
3178 c0 ^= ip0->dst_address.as_u32[3];
3180 hash_v3_finalize32 (a0, b0, c0);
3182 c0 &= BITS (hash_bitmap) - 1;
3183 c0 = c0 / BITS (uword);
3184 m0 = (uword) 1 << (c0 % BITS (uword));
3186 bm0 = hash_bitmap[c0];
3187 drop0 = (bm0 & m0) != 0;
3189 /* Mark it as seen. */
3190 hash_bitmap[c0] = bm0 | m0;
3194 to_next_drop[0] = pi0;
3196 n_left_to_next_drop -= 1;
3198 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
3200 /* If the interface is link-down, drop the pkt */
3201 if (!(hw_if0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
3204 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) > sw_if_index0)
3206 u32 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
3209 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3217 * the adj has been updated to a rewrite but the node the DPO that got
3218 * us here hasn't - yet. no big deal. we'll drop while we wait.
3220 if (IP_LOOKUP_NEXT_REWRITE == adj0->lookup_next_index)
3224 node->errors[drop0 ? IP6_DISCOVER_NEIGHBOR_ERROR_DROP
3225 : IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT];
3232 icmp6_neighbor_solicitation_header_t *h0;
3235 h0 = vlib_packet_template_get_packet
3236 (vm, &im->discover_neighbor_packet_template, &bi0);
3239 * Build ethernet header.
3240 * Choose source address based on destination lookup
3243 if (!ip6_src_address_for_packet (lm,
3246 &h0->ip.src_address))
3248 /* There is no address on the interface */
3250 node->errors[IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS];
3251 vlib_buffer_free (vm, &bi0, 1);
3256 * Destination address is a solicited node multicast address.
3257 * We need to fill in
3258 * the low 24 bits with low 24 bits of target's address.
3260 h0->ip.dst_address.as_u8[13] = ip0->dst_address.as_u8[13];
3261 h0->ip.dst_address.as_u8[14] = ip0->dst_address.as_u8[14];
3262 h0->ip.dst_address.as_u8[15] = ip0->dst_address.as_u8[15];
3264 h0->neighbor.target_address = ip0->dst_address;
3266 clib_memcpy (h0->link_layer_option.ethernet_address,
3267 hw_if0->hw_address, vec_len (hw_if0->hw_address));
3269 /* $$$$ appears we need this; why is the checksum non-zero? */
3270 h0->neighbor.icmp.checksum = 0;
3271 h0->neighbor.icmp.checksum =
3272 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h0->ip,
3275 ASSERT (bogus_length == 0);
3277 vlib_buffer_copy_trace_flag (vm, p0, bi0);
3278 b0 = vlib_get_buffer (vm, bi0);
3279 vnet_buffer (b0)->sw_if_index[VLIB_TX]
3280 = vnet_buffer (p0)->sw_if_index[VLIB_TX];
3282 vnet_buffer (b0)->ip.adj_index[VLIB_TX] =
3283 radv_info->mcast_adj_index;
3285 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
3286 next0 = IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX;
3288 vlib_set_next_frame_buffer (vm, node, next0, bi0);
3292 vlib_put_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
3293 n_left_to_next_drop);
3296 return frame->n_vectors;
3300 ip6_discover_neighbor (vlib_main_t * vm,
3301 vlib_node_runtime_t * node, vlib_frame_t * frame)
3303 return (ip6_discover_neighbor_inline (vm, node, frame, 0));
3307 ip6_glean (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3309 return (ip6_discover_neighbor_inline (vm, node, frame, 1));
3312 static char *ip6_discover_neighbor_error_strings[] = {
3313 [IP6_DISCOVER_NEIGHBOR_ERROR_DROP] = "address overflow drops",
3314 [IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT] = "neighbor solicitations sent",
3315 [IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS]
3316 = "no source address for ND solicitation",
3320 VLIB_REGISTER_NODE (ip6_glean_node) =
3322 .function = ip6_glean,
3323 .name = "ip6-glean",
3324 .vector_size = sizeof (u32),
3325 .format_trace = format_ip6_forward_next_trace,
3326 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
3327 .error_strings = ip6_discover_neighbor_error_strings,
3328 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
3331 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "ip6-drop",
3332 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "ip6-rewrite-mcast",
3335 VLIB_REGISTER_NODE (ip6_discover_neighbor_node) =
3337 .function = ip6_discover_neighbor,
3338 .name = "ip6-discover-neighbor",
3339 .vector_size = sizeof (u32),
3340 .format_trace = format_ip6_forward_next_trace,
3341 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
3342 .error_strings = ip6_discover_neighbor_error_strings,
3343 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
3346 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "ip6-drop",
3347 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "ip6-rewrite-mcast",
3352 /* API support functions */
3354 ip6_neighbor_ra_config (vlib_main_t * vm, u32 sw_if_index,
3355 u8 suppress, u8 managed, u8 other,
3356 u8 ll_option, u8 send_unicast, u8 cease,
3357 u8 use_lifetime, u32 lifetime,
3358 u32 initial_count, u32 initial_interval,
3359 u32 max_interval, u32 min_interval, u8 is_no)
3361 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3365 /* look up the radv_t information for this interface */
3366 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3368 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3369 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
3374 ip6_radv_t *radv_info;
3375 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3377 if ((max_interval != 0) && (min_interval == 0))
3378 min_interval = .75 * max_interval;
3382 0) ? ((is_no) ? DEF_MAX_RADV_INTERVAL : max_interval) :
3383 radv_info->max_radv_interval;
3386 0) ? ((is_no) ? DEF_MIN_RADV_INTERVAL : min_interval) :
3387 radv_info->min_radv_interval;
3390 0) ? ((is_no) ? DEF_DEF_RTR_LIFETIME : lifetime) :
3391 radv_info->adv_router_lifetime_in_sec;
3395 if (lifetime > MAX_DEF_RTR_LIFETIME)
3396 lifetime = MAX_DEF_RTR_LIFETIME;
3398 if (lifetime <= max_interval)
3399 return VNET_API_ERROR_INVALID_VALUE;
3402 if (min_interval != 0)
3404 if ((min_interval > .75 * max_interval) || (min_interval < 3))
3405 return VNET_API_ERROR_INVALID_VALUE;
3408 if ((initial_count > MAX_INITIAL_RTR_ADVERTISEMENTS) ||
3409 (initial_interval > MAX_INITIAL_RTR_ADVERT_INTERVAL))
3410 return VNET_API_ERROR_INVALID_VALUE;
3413 if "flag" is set and is_no is true then restore default value else set value corresponding to "flag"
3414 if "flag" is clear don't change corresponding value
3416 radv_info->send_radv =
3417 (suppress != 0) ? ((is_no != 0) ? 1 : 0) : radv_info->send_radv;
3418 radv_info->adv_managed_flag =
3419 (managed != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_managed_flag;
3420 radv_info->adv_other_flag =
3421 (other != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_other_flag;
3422 radv_info->adv_link_layer_address =
3424 0) ? ((is_no) ? 1 : 0) : radv_info->adv_link_layer_address;
3425 radv_info->send_unicast =
3426 (send_unicast != 0) ? ((is_no) ? 0 : 1) : radv_info->send_unicast;
3427 radv_info->cease_radv =
3428 (cease != 0) ? ((is_no) ? 0 : 1) : radv_info->cease_radv;
3430 radv_info->min_radv_interval = min_interval;
3431 radv_info->max_radv_interval = max_interval;
3432 radv_info->adv_router_lifetime_in_sec = lifetime;
3434 radv_info->initial_adverts_count =
3436 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERTISEMENTS : initial_count) :
3437 radv_info->initial_adverts_count;
3438 radv_info->initial_adverts_interval =
3439 (initial_interval !=
3440 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERT_INTERVAL : initial_interval) :
3441 radv_info->initial_adverts_interval;
3444 if ((cease != 0) && (is_no))
3445 radv_info->send_radv = 1;
3447 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
3448 radv_info->next_multicast_time = vlib_time_now (vm);
3449 radv_info->last_multicast_time = vlib_time_now (vm);
3450 radv_info->last_radv_time = 0;
3456 ip6_neighbor_ra_prefix (vlib_main_t * vm, u32 sw_if_index,
3457 ip6_address_t * prefix_addr, u8 prefix_len,
3458 u8 use_default, u32 val_lifetime, u32 pref_lifetime,
3459 u8 no_advertise, u8 off_link, u8 no_autoconfig,
3460 u8 no_onlink, u8 is_no)
3462 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3467 /* look up the radv_t information for this interface */
3468 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3471 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3473 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
3477 f64 now = vlib_time_now (vm);
3478 ip6_radv_t *radv_info;
3479 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3481 /* prefix info add, delete or update */
3482 ip6_radv_prefix_t *prefix;
3484 /* lookup prefix info for this address on this interface */
3485 uword *p = mhash_get (&radv_info->address_to_prefix_index, prefix_addr);
3487 prefix = p ? pool_elt_at_index (radv_info->adv_prefixes_pool, p[0]) : 0;
3493 return VNET_API_ERROR_INVALID_VALUE; /* invalid prefix */
3495 if (prefix->prefix_len != prefix_len)
3496 return VNET_API_ERROR_INVALID_VALUE_2;
3498 /* FIXME - Should the DP do this or the CP ? */
3499 /* do specific delete processing here before returning */
3500 /* try to remove from routing table */
3502 mhash_unset (&radv_info->address_to_prefix_index, prefix_addr,
3504 pool_put (radv_info->adv_prefixes_pool, prefix);
3506 radv_info->initial_adverts_sent =
3507 radv_info->initial_adverts_count - 1;
3508 radv_info->next_multicast_time = vlib_time_now (vm);
3509 radv_info->last_multicast_time = vlib_time_now (vm);
3510 radv_info->last_radv_time = 0;
3514 /* adding or changing */
3519 pool_get (radv_info->adv_prefixes_pool, prefix);
3520 pi = prefix - radv_info->adv_prefixes_pool;
3521 mhash_set (&radv_info->address_to_prefix_index, prefix_addr, pi,
3524 memset (prefix, 0x0, sizeof (ip6_radv_prefix_t));
3526 prefix->prefix_len = prefix_len;
3527 clib_memcpy (&prefix->prefix, prefix_addr, sizeof (ip6_address_t));
3529 /* initialize default values */
3530 prefix->adv_on_link_flag = 1; /* L bit set */
3531 prefix->adv_autonomous_flag = 1; /* A bit set */
3532 prefix->adv_valid_lifetime_in_secs = DEF_ADV_VALID_LIFETIME;
3533 prefix->adv_pref_lifetime_in_secs = DEF_ADV_PREF_LIFETIME;
3534 prefix->enabled = 1;
3535 prefix->decrement_lifetime_flag = 1;
3536 prefix->deprecated_prefix_flag = 1;
3540 /* FIXME - Should the DP do this or the CP ? */
3541 /* insert prefix into routing table as a connected prefix */
3550 if (prefix->prefix_len != prefix_len)
3551 return VNET_API_ERROR_INVALID_VALUE_2;
3555 /* FIXME - Should the DP do this or the CP ? */
3556 /* remove from routing table if already there */
3560 if ((val_lifetime == ~0) || (pref_lifetime == ~0))
3562 prefix->adv_valid_lifetime_in_secs = ~0;
3563 prefix->adv_pref_lifetime_in_secs = ~0;
3564 prefix->decrement_lifetime_flag = 0;
3568 prefix->adv_valid_lifetime_in_secs = val_lifetime;;
3569 prefix->adv_pref_lifetime_in_secs = pref_lifetime;
3572 /* copy remaining */
3573 prefix->enabled = !(no_advertise != 0);
3574 prefix->adv_on_link_flag = !((off_link != 0) || (no_onlink != 0));
3575 prefix->adv_autonomous_flag = !(no_autoconfig != 0);
3579 /* fill in the expiration times */
3580 prefix->valid_lifetime_expires =
3581 now + prefix->adv_valid_lifetime_in_secs;
3582 prefix->pref_lifetime_expires = now + prefix->adv_pref_lifetime_in_secs;
3584 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
3585 radv_info->next_multicast_time = vlib_time_now (vm);
3586 radv_info->last_multicast_time = vlib_time_now (vm);
3587 radv_info->last_radv_time = 0;
3593 ip6_neighbor_cmd (vlib_main_t * vm, unformat_input_t * main_input,
3594 vlib_cli_command_t * cmd)
3596 vnet_main_t *vnm = vnet_get_main ();
3597 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3598 clib_error_t *error = 0;
3600 u8 suppress = 0, managed = 0, other = 0;
3601 u8 suppress_ll_option = 0, send_unicast = 0, cease = 0;
3602 u8 use_lifetime = 0;
3603 u32 sw_if_index, ra_lifetime = 0, ra_initial_count =
3604 0, ra_initial_interval = 0;
3605 u32 ra_max_interval = 0, ra_min_interval = 0;
3607 unformat_input_t _line_input, *line_input = &_line_input;
3608 vnet_sw_interface_t *sw_if0;
3610 int add_radv_info = 1;
3611 __attribute__ ((unused)) ip6_radv_t *radv_info = 0;
3612 ip6_address_t ip6_addr;
3616 /* Get a line of input. */
3617 if (!unformat_user (main_input, unformat_line_input, line_input))
3620 /* get basic radv info for this interface */
3621 if (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3624 if (unformat_user (line_input,
3625 unformat_vnet_sw_interface, vnm, &sw_if_index))
3628 ethernet_interface_t *eth_if0 = 0;
3630 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
3631 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
3633 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
3638 clib_error_return (0, "Interface must be of ethernet type");
3642 /* look up the radv_t information for this interface */
3643 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3646 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3650 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3654 error = clib_error_return (0, "unknown interface %U'",
3655 format_unformat_error, line_input);
3661 error = clib_error_return (0, "invalid interface name %U'",
3662 format_unformat_error, line_input);
3667 /* get the rest of the command */
3668 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3670 if (unformat (line_input, "no"))
3672 else if (unformat (line_input, "prefix %U/%d",
3673 unformat_ip6_address, &ip6_addr, &addr_len))
3678 else if (unformat (line_input, "ra-managed-config-flag"))
3683 else if (unformat (line_input, "ra-other-config-flag"))
3688 else if (unformat (line_input, "ra-suppress") ||
3689 unformat (line_input, "ra-surpress"))
3694 else if (unformat (line_input, "ra-suppress-link-layer") ||
3695 unformat (line_input, "ra-surpress-link-layer"))
3697 suppress_ll_option = 1;
3700 else if (unformat (line_input, "ra-send-unicast"))
3705 else if (unformat (line_input, "ra-lifetime"))
3707 if (!unformat (line_input, "%d", &ra_lifetime))
3709 error = unformat_parse_error (line_input);
3715 else if (unformat (line_input, "ra-initial"))
3718 (line_input, "%d %d", &ra_initial_count, &ra_initial_interval))
3720 error = unformat_parse_error (line_input);
3725 else if (unformat (line_input, "ra-interval"))
3727 if (!unformat (line_input, "%d", &ra_max_interval))
3729 error = unformat_parse_error (line_input);
3733 if (!unformat (line_input, "%d", &ra_min_interval))
3734 ra_min_interval = 0;
3737 else if (unformat (line_input, "ra-cease"))
3744 error = unformat_parse_error (line_input);
3751 ip6_neighbor_ra_config (vm, sw_if_index,
3752 suppress, managed, other,
3753 suppress_ll_option, send_unicast, cease,
3754 use_lifetime, ra_lifetime,
3755 ra_initial_count, ra_initial_interval,
3756 ra_max_interval, ra_min_interval, is_no);
3760 u32 valid_lifetime_in_secs = 0;
3761 u32 pref_lifetime_in_secs = 0;
3762 u8 use_prefix_default_values = 0;
3763 u8 no_advertise = 0;
3765 u8 no_autoconfig = 0;
3768 /* get the rest of the command */
3769 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3771 if (unformat (line_input, "default"))
3773 use_prefix_default_values = 1;
3776 else if (unformat (line_input, "infinite"))
3778 valid_lifetime_in_secs = ~0;
3779 pref_lifetime_in_secs = ~0;
3782 else if (unformat (line_input, "%d %d", &valid_lifetime_in_secs,
3783 &pref_lifetime_in_secs))
3790 /* get the rest of the command */
3791 while (!use_prefix_default_values &&
3792 unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3794 if (unformat (line_input, "no-advertise"))
3796 else if (unformat (line_input, "off-link"))
3798 else if (unformat (line_input, "no-autoconfig"))
3800 else if (unformat (line_input, "no-onlink"))
3804 error = unformat_parse_error (line_input);
3809 ip6_neighbor_ra_prefix (vm, sw_if_index,
3810 &ip6_addr, addr_len,
3811 use_prefix_default_values,
3812 valid_lifetime_in_secs,
3813 pref_lifetime_in_secs,
3815 off_link, no_autoconfig, no_onlink, is_no);
3819 unformat_free (line_input);
3825 ip6_print_addrs (vlib_main_t * vm, u32 * addrs)
3827 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3830 for (i = 0; i < vec_len (addrs); i++)
3832 ip_interface_address_t *a =
3833 pool_elt_at_index (lm->if_address_pool, addrs[i]);
3834 ip6_address_t *address = ip_interface_address_get_address (lm, a);
3836 vlib_cli_output (vm, "\t\t%U/%d",
3837 format_ip6_address, address, a->address_length);
3841 static clib_error_t *
3842 show_ip6_interface_cmd (vlib_main_t * vm,
3843 unformat_input_t * input, vlib_cli_command_t * cmd)
3845 vnet_main_t *vnm = vnet_get_main ();
3846 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3847 clib_error_t *error = 0;
3852 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3856 /* look up the radv_t information for this interface */
3857 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3860 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3864 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3865 ip6_radv_t *radv_info;
3866 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3868 vlib_cli_output (vm, "%U is admin %s\n",
3869 format_vnet_sw_interface_name, vnm,
3870 vnet_get_sw_interface (vnm, sw_if_index),
3871 (vnet_sw_interface_is_admin_up (vnm, sw_if_index) ?
3875 u32 *link_scope = 0, *global_scope = 0;
3876 u32 *local_scope = 0, *unknown_scope = 0;
3877 ip_interface_address_t *a;
3879 vec_validate_init_empty (lm->if_address_pool_index_by_sw_if_index,
3881 ai = lm->if_address_pool_index_by_sw_if_index[sw_if_index];
3883 while (ai != (u32) ~ 0)
3885 a = pool_elt_at_index (lm->if_address_pool, ai);
3886 ip6_address_t *address =
3887 ip_interface_address_get_address (lm, a);
3889 if (ip6_address_is_link_local_unicast (address))
3890 vec_add1 (link_scope, ai);
3891 else if (ip6_address_is_global_unicast (address))
3892 vec_add1 (global_scope, ai);
3893 else if (ip6_address_is_local_unicast (address))
3894 vec_add1 (local_scope, ai);
3896 vec_add1 (unknown_scope, ai);
3898 ai = a->next_this_sw_interface;
3901 if (vec_len (link_scope))
3903 vlib_cli_output (vm, "\tLink-local address(es):\n");
3904 ip6_print_addrs (vm, link_scope);
3905 vec_free (link_scope);
3908 if (vec_len (local_scope))
3910 vlib_cli_output (vm, "\tLocal unicast address(es):\n");
3911 ip6_print_addrs (vm, local_scope);
3912 vec_free (local_scope);
3915 if (vec_len (global_scope))
3917 vlib_cli_output (vm, "\tGlobal unicast address(es):\n");
3918 ip6_print_addrs (vm, global_scope);
3919 vec_free (global_scope);
3922 if (vec_len (unknown_scope))
3924 vlib_cli_output (vm, "\tOther-scope address(es):\n");
3925 ip6_print_addrs (vm, unknown_scope);
3926 vec_free (unknown_scope);
3929 vlib_cli_output (vm, "\tLink-local address(es):\n");
3930 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
3931 &radv_info->link_local_address);
3933 vlib_cli_output (vm, "\tJoined group address(es):\n");
3934 ip6_mldp_group_t *m;
3936 pool_foreach (m, radv_info->mldp_group_pool,
3938 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
3943 vlib_cli_output (vm, "\tAdvertised Prefixes:\n");
3944 ip6_radv_prefix_t *p;
3946 pool_foreach (p, radv_info->adv_prefixes_pool,
3948 vlib_cli_output (vm, "\t\tprefix %U, length %d\n",
3949 format_ip6_address, &p->prefix, p->prefix_len);
3953 vlib_cli_output (vm, "\tMTU is %d\n", radv_info->adv_link_mtu);
3954 vlib_cli_output (vm, "\tICMP error messages are unlimited\n");
3955 vlib_cli_output (vm, "\tICMP redirects are disabled\n");
3956 vlib_cli_output (vm, "\tICMP unreachables are not sent\n");
3957 vlib_cli_output (vm, "\tND DAD is disabled\n");
3958 //vlib_cli_output (vm, "\tND reachable time is %d milliseconds\n",);
3959 vlib_cli_output (vm, "\tND advertised reachable time is %d\n",
3960 radv_info->adv_neighbor_reachable_time_in_msec);
3961 vlib_cli_output (vm,
3962 "\tND advertised retransmit interval is %d (msec)\n",
3964 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
3966 u32 ra_interval = radv_info->max_radv_interval;
3967 u32 ra_interval_min = radv_info->min_radv_interval;
3968 vlib_cli_output (vm,
3969 "\tND router advertisements are sent every %d seconds (min interval is %d)\n",
3970 ra_interval, ra_interval_min);
3971 vlib_cli_output (vm,
3972 "\tND router advertisements live for %d seconds\n",
3973 radv_info->adv_router_lifetime_in_sec);
3974 vlib_cli_output (vm,
3975 "\tHosts %s stateless autoconfig for addresses\n",
3976 (radv_info->adv_managed_flag) ? "use" :
3978 vlib_cli_output (vm, "\tND router advertisements sent %d\n",
3979 radv_info->n_advertisements_sent);
3980 vlib_cli_output (vm, "\tND router solicitations received %d\n",
3981 radv_info->n_solicitations_rcvd);
3982 vlib_cli_output (vm, "\tND router solicitations dropped %d\n",
3983 radv_info->n_solicitations_dropped);
3987 error = clib_error_return (0, "IPv6 not enabled on interface",
3988 format_unformat_error, input);
3996 * This command is used to display various IPv6 attributes on a given
4000 * Example of how to display IPv6 settings:
4001 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
4002 * GigabitEthernet2/0/0 is admin up
4003 * Link-local address(es):
4005 * Joined group address(es):
4010 * Advertised Prefixes:
4011 * prefix fe80::fe:28ff:fe9c:75b3, length 64
4013 * ICMP error messages are unlimited
4014 * ICMP redirects are disabled
4015 * ICMP unreachables are not sent
4016 * ND DAD is disabled
4017 * ND advertised reachable time is 0
4018 * ND advertised retransmit interval is 0 (msec)
4019 * ND router advertisements are sent every 200 seconds (min interval is 150)
4020 * ND router advertisements live for 600 seconds
4021 * Hosts use stateless autoconfig for addresses
4022 * ND router advertisements sent 19336
4023 * ND router solicitations received 0
4024 * ND router solicitations dropped 0
4026 * Example of output if IPv6 is not enabled on the interface:
4027 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
4028 * show ip6 interface: IPv6 not enabled on interface
4032 VLIB_CLI_COMMAND (show_ip6_interface_command, static) =
4034 .path = "show ip6 interface",
4035 .function = show_ip6_interface_cmd,
4036 .short_help = "show ip6 interface <interface>",
4041 disable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
4043 clib_error_t *error = 0;
4044 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4047 /* look up the radv_t information for this interface */
4048 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
4050 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4052 /* if not created - do nothing */
4055 ip6_radv_t *radv_info;
4057 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4059 /* check radv_info ref count for other ip6 addresses on this interface */
4060 /* This implicitly excludes the link local address */
4061 if (radv_info->ref_count == 0)
4063 /* essentially "disables" ipv6 on this interface */
4064 ip6_ll_prefix_t ilp = {
4065 .ilp_addr = radv_info->link_local_address,
4066 .ilp_sw_if_index = sw_if_index,
4068 ip6_ll_table_entry_delete (&ilp);
4069 ip6_sw_interface_enable_disable (sw_if_index, 0);
4070 ip6_mfib_interface_enable_disable (sw_if_index, 0);
4071 ip6_neighbor_sw_interface_add_del (vnet_get_main (), sw_if_index,
4079 ip6_interface_enabled (vlib_main_t * vm, u32 sw_if_index)
4081 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4084 /* look up the radv_t information for this interface */
4085 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
4088 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4094 enable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
4096 clib_error_t *error = 0;
4097 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
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,
4105 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4107 /* if not created yet */
4110 vnet_main_t *vnm = vnet_get_main ();
4111 vnet_sw_interface_t *sw_if0;
4113 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
4114 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
4116 ethernet_interface_t *eth_if0;
4119 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
4122 /* create radv_info. for this interface. This holds all the info needed for router adverts */
4124 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, is_add);
4128 ip6_radv_t *radv_info;
4129 ip6_address_t link_local_address;
4131 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4133 ip6_link_local_address_from_ethernet_mac_address
4134 (&link_local_address, eth_if0->address);
4136 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index);
4137 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_SUB ||
4138 sw_if0->type == VNET_SW_INTERFACE_TYPE_P2P)
4140 /* make up an interface id */
4141 link_local_address.as_u64[1] =
4142 random_u64 (&radv_info->randomizer);
4144 link_local_address.as_u64[0] =
4145 clib_host_to_net_u64 (0xFE80000000000000ULL);
4147 link_local_address.as_u8[8] &= 0xfd;
4150 ip6_ll_prefix_t ilp = {
4151 .ilp_addr = link_local_address,
4152 .ilp_sw_if_index = sw_if_index,
4155 ip6_ll_table_entry_update (&ilp, FIB_ROUTE_PATH_LOCAL);
4158 /* essentially "enables" ipv6 on this interface */
4159 ip6_mfib_interface_enable_disable (sw_if_index, 1);
4160 ip6_sw_interface_enable_disable (sw_if_index, 1);
4164 radv_info->link_local_address = link_local_address;
4174 ip6_get_ll_address (u32 sw_if_index, ip6_address_t * addr)
4176 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4177 ip6_radv_t *radv_info;
4180 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) < sw_if_index)
4183 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4188 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4189 *addr = radv_info->link_local_address;
4194 static clib_error_t *
4195 enable_ip6_interface_cmd (vlib_main_t * vm,
4196 unformat_input_t * input, vlib_cli_command_t * cmd)
4198 vnet_main_t *vnm = vnet_get_main ();
4199 clib_error_t *error = 0;
4204 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4206 enable_ip6_interface (vm, sw_if_index);
4210 error = clib_error_return (0, "unknown interface\n'",
4211 format_unformat_error, input);
4218 * This command is used to enable IPv6 on a given interface.
4221 * Example of how enable IPv6 on a given interface:
4222 * @cliexcmd{enable ip6 interface GigabitEthernet2/0/0}
4225 VLIB_CLI_COMMAND (enable_ip6_interface_command, static) =
4227 .path = "enable ip6 interface",
4228 .function = enable_ip6_interface_cmd,
4229 .short_help = "enable ip6 interface <interface>",
4233 static clib_error_t *
4234 disable_ip6_interface_cmd (vlib_main_t * vm,
4235 unformat_input_t * input, vlib_cli_command_t * cmd)
4237 vnet_main_t *vnm = vnet_get_main ();
4238 clib_error_t *error = 0;
4243 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4245 error = disable_ip6_interface (vm, sw_if_index);
4249 error = clib_error_return (0, "unknown interface\n'",
4250 format_unformat_error, input);
4257 * This command is used to disable IPv6 on a given interface.
4260 * Example of how disable IPv6 on a given interface:
4261 * @cliexcmd{disable ip6 interface GigabitEthernet2/0/0}
4264 VLIB_CLI_COMMAND (disable_ip6_interface_command, static) =
4266 .path = "disable ip6 interface",
4267 .function = disable_ip6_interface_cmd,
4268 .short_help = "disable ip6 interface <interface>",
4273 * This command is used to configure the neighbor discovery
4274 * parameters on a given interface. Use the '<em>show ip6 interface</em>'
4275 * command to display some of the current neighbor discovery parameters
4276 * on a given interface. This command has three formats:
4279 * <b>Format 1 - Router Advertisement Options:</b> (Only one can be entered in a single command)
4281 * '<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>'
4285 * <em>[no] ra-managed-config-flag</em> - Advertises in ICMPv6
4286 * router-advertisement messages to use stateful address
4287 * auto-configuration to obtain address information (sets the M-bit).
4288 * Default is the M-bit is not set and the '<em>no</em>' option
4289 * returns it to this default state.
4291 * <em>[no] ra-other-config-flag</em> - Indicates in ICMPv6
4292 * router-advertisement messages that hosts use stateful auto
4293 * configuration to obtain nonaddress related information (sets
4294 * the O-bit). Default is the O-bit is not set and the '<em>no</em>'
4295 * option returns it to this default state.
4297 * <em>[no] ra-suppress</em> - Disables sending ICMPv6 router-advertisement
4298 * messages. The '<em>no</em>' option implies to enable sending ICMPv6
4299 * router-advertisement messages.
4301 * <em>[no] ra-suppress-link-layer</em> - Indicates not to include the
4302 * optional source link-layer address in the ICMPv6 router-advertisement
4303 * messages. Default is to include the optional source link-layer address
4304 * and the '<em>no</em>' option returns it to this default state.
4306 * <em>[no] ra-send-unicast</em> - Use the source address of the
4307 * router-solicitation message if availiable. The default is to use
4308 * multicast address of all nodes, and the '<em>no</em>' option returns
4309 * it to this default state.
4311 * <em>[no] ra-lifetime <lifetime></em> - Advertises the lifetime of a
4312 * default router in ICMPv6 router-advertisement messages. The range is
4313 * from 0 to 9000 seconds. '<em><lifetime></em>' must be greater than
4314 * '<em><max-interval></em>'. The default value is 600 seconds and the
4315 * '<em>no</em>' option returns it to this default value.
4317 * <em>[no] ra-initial <cnt> <interval></em> - Number of initial ICMPv6
4318 * router-advertisement messages sent and the interval between each
4319 * message. Range for count is 1 - 3 and default is 3. Range for interval
4320 * is 1 to 16 seconds, and default is 16 seconds. The '<em>no</em>' option
4321 * returns both to their default value.
4323 * <em>[no] ra-interval <max-interval> [<min-interval>]</em> - Configures the
4324 * interval between sending ICMPv6 router-advertisement messages. The
4325 * range for max-interval is from 4 to 200 seconds. min-interval can not
4326 * be more than 75% of max-interval. If not set, min-interval will be
4327 * set to 75% of max-interval. The range for min-interval is from 3 to
4328 * 150 seconds. The '<em>no</em>' option returns both to their default
4331 * <em>[no] ra-cease</em> - Cease sending ICMPv6 router-advertisement messages.
4332 * The '<em>no</em>' options implies to start (or restart) sending
4333 * ICMPv6 router-advertisement messages.
4336 * <b>Format 2 - Prefix Options:</b>
4338 * '<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>'
4342 * <em>no</em> - All additional flags are ignored and the prefix is deleted.
4344 * <em><valid-lifetime> <pref-lifetime></em> - '<em><valid-lifetime></em>' is the
4345 * length of time in seconds during what the prefix is valid for the purpose of
4346 * on-link determination. Range is 7203 to 2592000 seconds and default is 2592000
4347 * seconds (30 days). '<em><pref-lifetime></em>' is the prefered-lifetime and is the
4348 * length of time in seconds during what addresses generated from the prefix remain
4349 * preferred. Range is 0 to 604800 seconds and default is 604800 seconds (7 days).
4351 * <em>infinite</em> - Both '<em><valid-lifetime></em>' and '<em><<pref-lifetime></em>'
4352 * are inifinte, no timeout.
4354 * <em>no-advertise</em> - Do not send full router address in prefix
4355 * advertisement. Default is to advertise (i.e. - This flag is off by default).
4357 * <em>off-link</em> - Prefix is off-link, clear L-bit in packet. Default is on-link
4358 * (i.e. - This flag is off and L-bit in packet is set by default and this prefix can
4359 * be used for on-link determination). '<em>no-onlink</em>' also controls the L-bit.
4361 * <em>no-autoconfig</em> - Do not use prefix for autoconfiguration, clear A-bit in packet.
4362 * Default is autoconfig (i.e. - This flag is off and A-bit in packet is set by default.
4364 * <em>no-onlink</em> - Do not use prefix for onlink determination, clear L-bit in packet.
4365 * Default is on-link (i.e. - This flag is off and L-bit in packet is set by default and
4366 * this prefix can be used for on-link determination). '<em>off-link</em>' also controls
4370 * <b>Format 3: - Default of Prefix:</b>
4372 * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> default</b></em>'
4374 * When a new prefix is added (or existing one is being overwritten) <em>default</em>
4375 * uses default values for the prefix. If <em>no</em> is used, the <em>default</em>
4376 * is ignored and the prefix is deleted.
4380 * Example of how set a router advertisement option:
4381 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 ra-interval 100 20}
4382 * Example of how to add a prefix:
4383 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 prefix fe80::fe:28ff:fe9c:75b3/64 infinite no-advertise}
4384 * Example of how to delete a prefix:
4385 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 no prefix fe80::fe:28ff:fe9c:75b3/64}
4388 VLIB_CLI_COMMAND (ip6_nd_command, static) =
4391 .short_help = "ip6 nd <interface> ...",
4392 .function = ip6_neighbor_cmd,
4397 set_ip6_link_local_address (vlib_main_t * vm,
4398 u32 sw_if_index, ip6_address_t * address)
4400 clib_error_t *error = 0;
4401 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4403 ip6_radv_t *radv_info;
4404 vnet_main_t *vnm = vnet_get_main ();
4406 if (!ip6_address_is_link_local_unicast (address))
4408 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_LINK_LOCAL;
4409 return (error = clib_error_return (0, "address not link-local",
4410 format_unformat_error));
4413 /* call enable ipv6 */
4414 enable_ip6_interface (vm, sw_if_index);
4416 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4420 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4422 /* save if link local address (overwrite default) */
4424 /* delete the old one */
4425 error = ip6_add_del_interface_address (vm, sw_if_index,
4426 &radv_info->link_local_address,
4427 128, 1 /* is_del */ );
4431 /* add the new one */
4432 error = ip6_add_del_interface_address (vm, sw_if_index,
4438 radv_info->link_local_address = *address;
4444 vnm->api_errno = VNET_API_ERROR_IP6_NOT_ENABLED;
4445 error = clib_error_return (0, "ip6 not enabled for interface",
4446 format_unformat_error);
4452 set_ip6_link_local_address_cmd (vlib_main_t * vm,
4453 unformat_input_t * input,
4454 vlib_cli_command_t * cmd)
4456 vnet_main_t *vnm = vnet_get_main ();
4457 clib_error_t *error = 0;
4459 ip6_address_t ip6_addr;
4461 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4463 /* get the rest of the command */
4464 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
4466 if (unformat (input, "%U", unformat_ip6_address, &ip6_addr))
4469 return (unformat_parse_error (input));
4472 error = set_ip6_link_local_address (vm, sw_if_index, &ip6_addr);
4477 * This command is used to assign an IPv6 Link-local address to an
4478 * interface. This command will enable IPv6 on an interface if it
4479 * is not already enabled. Use the '<em>show ip6 interface</em>' command
4480 * to display the assigned Link-local address.
4483 * Example of how to assign an IPv6 Link-local address to an interface:
4484 * @cliexcmd{set ip6 link-local address GigabitEthernet2/0/0 FE80::AB8}
4487 VLIB_CLI_COMMAND (set_ip6_link_local_address_command, static) =
4489 .path = "set ip6 link-local address",
4490 .short_help = "set ip6 link-local address <interface> <ip6-address>",
4491 .function = set_ip6_link_local_address_cmd,
4496 * @brief callback when an interface address is added or deleted
4499 ip6_neighbor_add_del_interface_address (ip6_main_t * im,
4502 ip6_address_t * address,
4504 u32 if_address_index, u32 is_delete)
4506 vnet_main_t *vnm = vnet_get_main ();
4507 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4509 vlib_main_t *vm = vnm->vlib_main;
4510 ip6_radv_t *radv_info;
4513 /* create solicited node multicast address for this interface adddress */
4514 ip6_set_solicited_node_multicast_address (&a, 0);
4516 a.as_u8[0xd] = address->as_u8[0xd];
4517 a.as_u8[0xe] = address->as_u8[0xe];
4518 a.as_u8[0xf] = address->as_u8[0xf];
4522 /* try to create radv_info - does nothing if ipv6 already enabled */
4523 enable_ip6_interface (vm, sw_if_index);
4525 /* look up the radv_t information for this interface */
4526 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
4528 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4532 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4535 if (!ip6_address_is_link_local_unicast (address))
4536 radv_info->ref_count++;
4538 ip6_neighbor_add_mld_prefix (radv_info, &a);
4545 /* look up the radv_t information for this interface */
4546 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
4548 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4553 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4555 ip6_neighbor_del_mld_prefix (radv_info, &a);
4557 /* if interface up send MLDP "report" */
4558 radv_info->all_routers_mcast = 0;
4561 if (!ip6_address_is_link_local_unicast (address))
4562 radv_info->ref_count--;
4564 /* Ensure that IPv6 is disabled, and LL removed after ref_count reaches 0 */
4565 disable_ip6_interface (vm, sw_if_index);
4570 ip6_set_neighbor_limit (u32 neighbor_limit)
4572 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4574 nm->limit_neighbor_cache_size = neighbor_limit;
4579 ip6_neighbor_table_bind (ip6_main_t * im,
4582 u32 new_fib_index, u32 old_fib_index)
4584 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4585 ip6_neighbor_t *n = NULL;
4586 u32 i, *to_re_add = 0;
4589 pool_foreach (n, nm->neighbor_pool,
4591 if (n->key.sw_if_index == sw_if_index)
4592 vec_add1 (to_re_add, n - nm->neighbor_pool);
4596 for (i = 0; i < vec_len (to_re_add); i++)
4598 n = pool_elt_at_index (nm->neighbor_pool, to_re_add[i]);
4599 ip6_neighbor_adj_fib_remove (n, old_fib_index);
4600 ip6_neighbor_adj_fib_add (n, new_fib_index);
4602 vec_free (to_re_add);
4605 static clib_error_t *
4606 ip6_neighbor_init (vlib_main_t * vm)
4608 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4609 ip6_main_t *im = &ip6_main;
4611 mhash_init (&nm->neighbor_index_by_key,
4612 /* value size */ sizeof (uword),
4613 /* key size */ sizeof (ip6_neighbor_key_t));
4615 icmp6_register_type (vm, ICMP6_neighbor_solicitation,
4616 ip6_icmp_neighbor_solicitation_node.index);
4617 icmp6_register_type (vm, ICMP6_neighbor_advertisement,
4618 ip6_icmp_neighbor_advertisement_node.index);
4619 icmp6_register_type (vm, ICMP6_router_solicitation,
4620 ip6_icmp_router_solicitation_node.index);
4621 icmp6_register_type (vm, ICMP6_router_advertisement,
4622 ip6_icmp_router_advertisement_node.index);
4624 /* handler node for ip6 neighbor discovery events and timers */
4625 vlib_register_node (vm, &ip6_icmp_neighbor_discovery_event_node);
4627 /* add call backs */
4628 ip6_add_del_interface_address_callback_t cb;
4629 memset (&cb, 0x0, sizeof (ip6_add_del_interface_address_callback_t));
4631 /* when an interface address changes... */
4632 cb.function = ip6_neighbor_add_del_interface_address;
4633 cb.function_opaque = 0;
4634 vec_add1 (im->add_del_interface_address_callbacks, cb);
4636 ip6_table_bind_callback_t cbt;
4637 cbt.function = ip6_neighbor_table_bind;
4638 cbt.function_opaque = 0;
4639 vec_add1 (im->table_bind_callbacks, cbt);
4641 mhash_init (&nm->pending_resolutions_by_address,
4642 /* value size */ sizeof (uword),
4643 /* key size */ sizeof (ip6_address_t));
4645 mhash_init (&nm->mac_changes_by_address,
4646 /* value size */ sizeof (uword),
4647 /* key size */ sizeof (ip6_address_t));
4649 /* default, configurable */
4650 nm->limit_neighbor_cache_size = 50000;
4652 nm->wc_ip6_nd_publisher_node = (uword) ~ 0;
4654 nm->ip6_ra_publisher_node = (uword) ~ 0;
4657 /* $$$$ Hack fix for today */
4658 vec_validate_init_empty
4659 (im->discover_neighbor_next_index_by_hw_if_index, 32, 0 /* drop */ );
4665 VLIB_INIT_FUNCTION (ip6_neighbor_init);
4669 vnet_register_ip6_neighbor_resolution_event (vnet_main_t * vnm,
4672 uword type_opaque, uword data)
4674 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4675 ip6_address_t *address = address_arg;
4677 pending_resolution_t *pr;
4679 pool_get (nm->pending_resolutions, pr);
4681 pr->next_index = ~0;
4682 pr->node_index = node_index;
4683 pr->type_opaque = type_opaque;
4686 p = mhash_get (&nm->pending_resolutions_by_address, address);
4689 /* Insert new resolution at the head of the list */
4690 pr->next_index = p[0];
4691 mhash_unset (&nm->pending_resolutions_by_address, address, 0);
4694 mhash_set (&nm->pending_resolutions_by_address, address,
4695 pr - nm->pending_resolutions, 0 /* old value */ );
4699 vnet_add_del_ip6_nd_change_event (vnet_main_t * vnm,
4700 void *data_callback,
4704 uword type_opaque, uword data, int is_add)
4706 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4707 ip6_address_t *address = address_arg;
4709 /* Try to find an existing entry */
4710 u32 *first = (u32 *) mhash_get (&nm->mac_changes_by_address, address);
4712 pending_resolution_t *mc;
4713 while (p && *p != ~0)
4715 mc = pool_elt_at_index (nm->mac_changes, *p);
4716 if (mc->node_index == node_index && mc->type_opaque == type_opaque
4719 p = &mc->next_index;
4722 int found = p && *p != ~0;
4726 return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
4728 pool_get (nm->mac_changes, mc);
4729 *mc = (pending_resolution_t)
4731 .next_index = ~0,.node_index = node_index,.type_opaque =
4732 type_opaque,.data = data,.data_callback = data_callback,.pid =
4735 /* Insert new resolution at the end of the list */
4736 u32 new_idx = mc - nm->mac_changes;
4740 mhash_set (&nm->mac_changes_by_address, address, new_idx, 0);
4745 return VNET_API_ERROR_NO_SUCH_ENTRY;
4747 /* Clients may need to clean up pool entries, too */
4748 void (*fp) (u32, u8 *) = data_callback;
4750 (*fp) (mc->data, 0 /* no new mac addrs */ );
4752 /* Remove the entry from the list and delete the entry */
4753 *p = mc->next_index;
4754 pool_put (nm->mac_changes, mc);
4756 /* Remove from hash if we deleted the last entry */
4757 if (*p == ~0 && p == first)
4758 mhash_unset (&nm->mac_changes_by_address, address, 0);
4764 vnet_ip6_nd_term (vlib_main_t * vm,
4765 vlib_node_runtime_t * node,
4767 ethernet_header_t * eth,
4768 ip6_header_t * ip, u32 sw_if_index, u16 bd_index)
4770 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4771 icmp6_neighbor_solicitation_or_advertisement_header_t *ndh;
4773 ndh = ip6_next_header (ip);
4774 if (ndh->icmp.type != ICMP6_neighbor_solicitation &&
4775 ndh->icmp.type != ICMP6_neighbor_advertisement)
4778 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
4779 (p0->flags & VLIB_BUFFER_IS_TRACED)))
4781 u8 *t0 = vlib_add_trace (vm, node, p0,
4782 sizeof (icmp6_input_trace_t));
4783 clib_memcpy (t0, ip, sizeof (icmp6_input_trace_t));
4786 /* Check if anyone want ND events for L2 BDs */
4788 (nm->wc_ip6_nd_publisher_node != (uword) ~ 0
4789 && !ip6_address_is_link_local_unicast (&ip->src_address)))
4791 vnet_nd_wc_publish (sw_if_index, eth->src_address, &ip->src_address);
4794 /* Check if MAC entry exsist for solicited target IP */
4795 if (ndh->icmp.type == ICMP6_neighbor_solicitation)
4797 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *opt;
4798 l2_bridge_domain_t *bd_config;
4801 opt = (void *) (ndh + 1);
4802 if ((opt->header.type !=
4803 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address) ||
4804 (opt->header.n_data_u64s != 1))
4805 return 0; /* source link layer address option not present */
4807 bd_config = vec_elt_at_index (l2input_main.bd_configs, bd_index);
4809 (u8 *) hash_get_mem (bd_config->mac_by_ip6, &ndh->target_address);
4811 { /* found ip-mac entry, generate eighbor advertisement response */
4813 vlib_node_runtime_t *error_node =
4814 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
4815 ip->dst_address = ip->src_address;
4816 ip->src_address = ndh->target_address;
4817 ip->hop_limit = 255;
4819 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
4820 clib_memcpy (opt->ethernet_address, macp, 6);
4821 ndh->icmp.type = ICMP6_neighbor_advertisement;
4822 ndh->advertisement_flags = clib_host_to_net_u32
4823 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED |
4824 ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
4825 ndh->icmp.checksum = 0;
4826 ndh->icmp.checksum =
4827 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip, &bogus_length);
4828 clib_memcpy (eth->dst_address, eth->src_address, 6);
4829 clib_memcpy (eth->src_address, macp, 6);
4830 vlib_error_count (vm, error_node->node_index,
4831 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX, 1);
4841 ip6_neighbor_proxy_add_del (u32 sw_if_index, ip6_address_t * addr, u8 is_del)
4845 fib_prefix_t pfx = {
4847 .fp_proto = FIB_PROTOCOL_IP6,
4852 ip46_address_t nh = {
4856 fib_index = ip6_fib_table_get_index_for_sw_if_index (sw_if_index);
4858 if (~0 == fib_index)
4859 return VNET_API_ERROR_NO_SUCH_FIB;
4863 fib_table_entry_path_remove (fib_index,
4865 FIB_SOURCE_IP6_ND_PROXY,
4869 ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
4870 /* flush the ND cache of this address if it's there */
4871 vnet_unset_ip6_ethernet_neighbor (vlib_get_main (),
4872 sw_if_index, addr, NULL, 0);
4876 fib_table_entry_path_add (fib_index,
4878 FIB_SOURCE_IP6_ND_PROXY,
4879 FIB_ENTRY_FLAG_NONE,
4883 ~0, 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
4888 static clib_error_t *
4889 set_ip6_nd_proxy_cmd (vlib_main_t * vm,
4890 unformat_input_t * input, vlib_cli_command_t * cmd)
4892 vnet_main_t *vnm = vnet_get_main ();
4893 clib_error_t *error = 0;
4898 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4900 /* get the rest of the command */
4901 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
4903 if (unformat (input, "%U", unformat_ip6_address, &addr))
4905 else if (unformat (input, "delete") || unformat (input, "del"))
4908 return (unformat_parse_error (input));
4912 ip6_neighbor_proxy_add_del (sw_if_index, &addr, is_del);
4918 VLIB_CLI_COMMAND (set_ip6_nd_proxy_command, static) =
4920 .path = "set ip6 nd proxy",
4921 .short_help = "set ip6 nd proxy <HOST> <INTERFACE>",
4922 .function = set_ip6_nd_proxy_cmd,
4927 ethernet_ndp_change_mac (u32 sw_if_index)
4929 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4934 pool_foreach (n, nm->neighbor_pool,
4936 if (n->key.sw_if_index == sw_if_index)
4938 adj_nbr_walk_nh6 (sw_if_index,
4939 &n->key.ip6_address,
4940 ip6_nd_mk_complete_walk, n);
4945 ai = adj_glean_get (FIB_PROTOCOL_IP6, sw_if_index);
4947 if (ADJ_INDEX_INVALID != ai)
4948 adj_glean_update_rewrite (ai);
4952 send_ip6_na (vlib_main_t * vm, const vnet_hw_interface_t * hi)
4954 ip6_main_t *i6m = &ip6_main;
4955 u32 sw_if_index = hi->sw_if_index;
4956 ip6_address_t *ip6_addr = ip6_interface_first_address (i6m, sw_if_index);
4958 send_ip6_na_w_addr (vm, ip6_addr, hi);
4962 send_ip6_na_w_addr (vlib_main_t * vm,
4963 const ip6_address_t * ip6_addr,
4964 const vnet_hw_interface_t * hi)
4966 ip6_main_t *i6m = &ip6_main;
4967 u32 sw_if_index = hi->sw_if_index;
4972 ("Sending unsolicitated NA IP6 address %U on sw_if_idex %d",
4973 format_ip6_address, ip6_addr, sw_if_index);
4975 /* Form unsolicited neighbor advertisement packet from NS pkt template */
4978 icmp6_neighbor_solicitation_header_t *h =
4979 vlib_packet_template_get_packet (vm,
4980 &i6m->discover_neighbor_packet_template,
4982 ip6_set_reserved_multicast_address (&h->ip.dst_address,
4983 IP6_MULTICAST_SCOPE_link_local,
4984 IP6_MULTICAST_GROUP_ID_all_hosts);
4985 h->ip.src_address = ip6_addr[0];
4986 h->neighbor.icmp.type = ICMP6_neighbor_advertisement;
4987 h->neighbor.target_address = ip6_addr[0];
4988 h->neighbor.advertisement_flags = clib_host_to_net_u32
4989 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
4990 clib_memcpy (h->link_layer_option.ethernet_address,
4991 hi->hw_address, vec_len (hi->hw_address));
4992 h->neighbor.icmp.checksum =
4993 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
4994 ASSERT (bogus_length == 0);
4996 /* Setup MAC header with IP6 Etype and mcast DMAC */
4997 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
4998 vlib_buffer_advance (b, -sizeof (ethernet_header_t));
4999 ethernet_header_t *e = vlib_buffer_get_current (b);
5000 e->type = clib_host_to_net_u16 (ETHERNET_TYPE_IP6);
5001 clib_memcpy (e->src_address, hi->hw_address, sizeof (e->src_address));
5002 ip6_multicast_ethernet_address (e->dst_address,
5003 IP6_MULTICAST_GROUP_ID_all_hosts);
5005 /* Send unsolicited ND advertisement packet out the specified interface */
5006 vnet_buffer (b)->sw_if_index[VLIB_RX] =
5007 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
5008 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
5009 u32 *to_next = vlib_frame_vector_args (f);
5012 vlib_put_frame_to_node (vm, hi->output_node_index, f);
5017 * fd.io coding-style-patch-verification: ON
5020 * eval: (c-set-style "gnu")