2 * ip/ip6_neighbor.c: IP6 neighbor handling
4 * Copyright (c) 2010 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
18 #include <vnet/ip/ip.h>
19 #include <vnet/ip/ip6_neighbor.h>
20 #include <vnet/ethernet/ethernet.h>
21 #include <vppinfra/mhash.h>
22 #include <vnet/adj/adj.h>
23 #include <vnet/adj/adj_mcast.h>
24 #include <vnet/fib/fib_table.h>
25 #include <vnet/fib/ip6_fib.h>
26 #include <vnet/mfib/ip6_mfib.h>
27 #include <vnet/ip/ip6_ll_table.h>
28 #include <vnet/l2/l2_input.h>
32 * @brief IPv6 Neighbor Adjacency and Neighbor Discovery.
34 * The files contains the API and CLI code for managing IPv6 neighbor
35 * adjacency tables and neighbor discovery logic.
38 /* can't use sizeof link_layer_address, that's 8 */
39 #define ETHER_MAC_ADDR_LEN 6
41 /* advertised prefix option */
44 /* basic advertised information */
48 int adv_autonomous_flag;
49 u32 adv_valid_lifetime_in_secs;
50 u32 adv_pref_lifetime_in_secs;
52 /* advertised values are computed from these times if decrementing */
53 f64 valid_lifetime_expires;
54 f64 pref_lifetime_expires;
56 /* local information */
58 int deprecated_prefix_flag;
59 int decrement_lifetime_flag;
61 #define MIN_ADV_VALID_LIFETIME 7203 /* seconds */
62 #define DEF_ADV_VALID_LIFETIME 2592000
63 #define DEF_ADV_PREF_LIFETIME 604800
65 /* extensions are added here, mobile, DNS etc.. */
71 /* group information */
73 ip6_address_t mcast_address;
75 ip6_address_t *mcast_source_address_pool;
78 /* configured router advertisement information per ipv6 interface */
82 /* advertised config information, zero means unspecified */
86 u16 adv_router_lifetime_in_sec;
87 u32 adv_neighbor_reachable_time_in_msec;
88 u32 adv_time_in_msec_between_retransmitted_neighbor_solicitations;
93 /* source link layer option */
94 u8 link_layer_address[8];
95 u8 link_layer_addr_len;
98 ip6_radv_prefix_t *adv_prefixes_pool;
100 /* Hash table mapping address to index in interface advertised prefix pool. */
101 mhash_t address_to_prefix_index;
103 /* MLDP group information */
104 ip6_mldp_group_t *mldp_group_pool;
106 /* Hash table mapping address to index in mldp address pool. */
107 mhash_t address_to_mldp_index;
109 /* local information */
111 int send_radv; /* radv on/off on this interface - set by config */
112 int cease_radv; /* we are ceasing to send - set byf config */
114 int adv_link_layer_address;
116 int failed_device_check;
117 int all_routers_mcast;
121 adj_index_t mcast_adj_index;
123 /* timing information */
124 #define DEF_MAX_RADV_INTERVAL 200
125 #define DEF_MIN_RADV_INTERVAL .75 * DEF_MAX_RADV_INTERVAL
126 #define DEF_CURR_HOP_LIMIT 64
127 #define DEF_DEF_RTR_LIFETIME 3 * DEF_MAX_RADV_INTERVAL
128 #define MAX_DEF_RTR_LIFETIME 9000
130 #define MAX_INITIAL_RTR_ADVERT_INTERVAL 16 /* seconds */
131 #define MAX_INITIAL_RTR_ADVERTISEMENTS 3 /*transmissions */
132 #define MIN_DELAY_BETWEEN_RAS 3 /* seconds */
133 #define MAX_DELAY_BETWEEN_RAS 1800 /* seconds */
134 #define MAX_RA_DELAY_TIME .5 /* seconds */
136 f64 max_radv_interval;
137 f64 min_radv_interval;
138 f64 min_delay_between_radv;
139 f64 max_delay_between_radv;
140 f64 max_rtr_default_lifetime;
143 f64 last_multicast_time;
144 f64 next_multicast_time;
147 u32 initial_adverts_count;
148 f64 initial_adverts_interval;
149 u32 initial_adverts_sent;
152 u32 n_advertisements_sent;
153 u32 n_solicitations_rcvd;
154 u32 n_solicitations_dropped;
156 /* Link local address to use (defaults to underlying physical for logical interfaces */
157 ip6_address_t link_local_address;
159 /* router solicitations sending state */
160 u8 keep_sending_rs; /* when true then next fields are valid */
161 icmp6_send_router_solicitation_params_t params;
166 vlib_buffer_t *buffer;
175 /* Used for nd event notification only */
178 } pending_resolution_t;
183 /* Hash tables mapping name to opcode. */
184 uword *opcode_by_name;
186 /* lite beer "glean" adjacency handling */
187 mhash_t pending_resolutions_by_address;
188 pending_resolution_t *pending_resolutions;
190 /* Mac address change notification */
191 mhash_t mac_changes_by_address;
192 pending_resolution_t *mac_changes;
194 u32 *neighbor_input_next_index_by_hw_if_index;
196 ip6_neighbor_t *neighbor_pool;
198 mhash_t neighbor_index_by_key;
200 u32 *if_radv_pool_index_by_sw_if_index;
202 ip6_radv_t *if_radv_pool;
204 /* Neighbor attack mitigation */
205 u32 limit_neighbor_cache_size;
206 u32 neighbor_delete_rotor;
208 /* Wildcard nd report publisher */
209 uword wc_ip6_nd_publisher_node;
210 uword wc_ip6_nd_publisher_et;
212 /* Router advertisement report publisher */
213 uword ip6_ra_publisher_node;
214 uword ip6_ra_publisher_et;
215 } ip6_neighbor_main_t;
217 /* ipv6 neighbor discovery - timer/event types */
221 } ip6_icmp_neighbor_discovery_event_type_t;
231 } ip6_icmp_neighbor_discovery_event_data_t;
233 static ip6_neighbor_main_t ip6_neighbor_main;
234 ip6_neighbor_public_main_t ip6_neighbor_public_main;
235 static ip6_address_t ip6a_zero; /* ip6 address 0 */
237 static void wc_nd_signal_report (wc_nd_report_t * r);
238 static void ra_signal_report (ra_report_t * r);
241 ip6_neighbor_get_link_local_address (u32 sw_if_index)
243 static ip6_address_t empty_address = { {0} };
244 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
245 ip6_radv_t *radv_info;
248 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) > sw_if_index)
249 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
252 clib_warning ("IPv6 is not enabled for sw_if_index %d", sw_if_index);
253 return empty_address;
255 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
256 if (radv_info == NULL)
258 clib_warning ("Internal error");
259 return empty_address;
261 return radv_info->link_local_address;
265 * @brief publish wildcard arp event
266 * @param sw_if_index The interface on which the ARP entires are acted
269 vnet_nd_wc_publish (u32 sw_if_index, u8 * mac, ip6_address_t * ip6)
272 .sw_if_index = sw_if_index,
275 memcpy (r.mac, mac, sizeof r.mac);
277 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
278 vl_api_rpc_call_main_thread (wc_nd_signal_report, (u8 *) & r, sizeof r);
283 wc_nd_signal_report (wc_nd_report_t * r)
285 vlib_main_t *vm = vlib_get_main ();
286 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
287 uword ni = nm->wc_ip6_nd_publisher_node;
288 uword et = nm->wc_ip6_nd_publisher_et;
290 if (ni == (uword) ~ 0)
293 vlib_process_signal_event_data (vm, ni, et, 1, sizeof *q);
299 wc_nd_set_publisher_node (uword node_index, uword event_type)
301 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
302 nm->wc_ip6_nd_publisher_node = node_index;
303 nm->wc_ip6_nd_publisher_et = event_type;
307 ra_publish (ra_report_t * r)
309 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
310 vl_api_rpc_call_main_thread (ra_signal_report, (u8 *) r, sizeof *r);
315 ra_signal_report (ra_report_t * r)
317 vlib_main_t *vm = vlib_get_main ();
318 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
319 uword ni = nm->ip6_ra_publisher_node;
320 uword et = nm->ip6_ra_publisher_et;
322 if (ni == (uword) ~ 0)
324 ra_report_t *q = vlib_process_signal_event_data (vm, ni, et, 1, sizeof *q);
330 ra_set_publisher_node (uword node_index, uword event_type)
332 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
333 nm->ip6_ra_publisher_node = node_index;
334 nm->ip6_ra_publisher_et = event_type;
338 format_ip6_neighbor_ip6_entry (u8 * s, va_list * va)
340 vlib_main_t *vm = va_arg (*va, vlib_main_t *);
341 ip6_neighbor_t *n = va_arg (*va, ip6_neighbor_t *);
342 vnet_main_t *vnm = vnet_get_main ();
343 vnet_sw_interface_t *si;
347 return format (s, "%=12s%=45s%=6s%=20s%=40s", "Time", "Address", "Flags",
348 "Link layer", "Interface");
350 if (n->flags & IP6_NEIGHBOR_FLAG_DYNAMIC)
351 flags = format (flags, "D");
353 if (n->flags & IP6_NEIGHBOR_FLAG_STATIC)
354 flags = format (flags, "S");
356 if (n->flags & IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY)
357 flags = format (flags, "N");
359 si = vnet_get_sw_interface (vnm, n->key.sw_if_index);
360 s = format (s, "%=12U%=45U%=6s%=20U%=40U",
361 format_vlib_time, vm, n->time_last_updated,
362 format_ip6_address, &n->key.ip6_address,
363 flags ? (char *) flags : "",
364 format_ethernet_address, n->link_layer_address,
365 format_vnet_sw_interface_name, vnm, si);
372 ip6_neighbor_adj_fib_remove (ip6_neighbor_t * n, u32 fib_index)
374 if (FIB_NODE_INDEX_INVALID != n->fib_entry_index)
376 if (ip6_address_is_link_local_unicast (&n->key.ip6_address))
378 ip6_ll_prefix_t pfx = {
379 .ilp_addr = n->key.ip6_address,
380 .ilp_sw_if_index = n->key.sw_if_index,
382 ip6_ll_table_entry_delete (&pfx);
388 .fp_proto = FIB_PROTOCOL_IP6,
389 .fp_addr.ip6 = n->key.ip6_address,
391 fib_table_entry_path_remove (fib_index,
396 n->key.sw_if_index, ~0,
397 1, FIB_ROUTE_PATH_FLAG_NONE);
407 u8 link_layer_address[6];
410 } ip6_neighbor_set_unset_rpc_args_t;
412 static void ip6_neighbor_set_unset_rpc_callback
413 (ip6_neighbor_set_unset_rpc_args_t * a);
415 static void set_unset_ip6_neighbor_rpc
418 const ip6_address_t * a,
419 const u8 * link_layer_address,
420 int is_add, int is_static, int is_no_fib_entry)
422 ip6_neighbor_set_unset_rpc_args_t args;
423 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
425 args.sw_if_index = sw_if_index;
426 args.is_add = is_add;
427 args.is_static = is_static;
428 args.is_no_fib_entry = is_no_fib_entry;
429 clib_memcpy (&args.addr, a, sizeof (*a));
430 if (NULL != link_layer_address)
431 clib_memcpy (args.link_layer_address, link_layer_address, 6);
433 vl_api_rpc_call_main_thread (ip6_neighbor_set_unset_rpc_callback,
434 (u8 *) & args, sizeof (args));
438 ip6_nbr_probe (ip_adjacency_t * adj)
440 icmp6_neighbor_solicitation_header_t *h;
441 vnet_main_t *vnm = vnet_get_main ();
442 ip6_main_t *im = &ip6_main;
443 ip_interface_address_t *ia;
444 ip6_address_t *dst, *src;
445 vnet_hw_interface_t *hi;
446 vnet_sw_interface_t *si;
452 vm = vlib_get_main ();
454 si = vnet_get_sw_interface (vnm, adj->rewrite_header.sw_if_index);
455 dst = &adj->sub_type.nbr.next_hop.ip6;
457 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
461 src = ip6_interface_address_matching_destination (im, dst,
469 h = vlib_packet_template_get_packet (vm,
470 &im->discover_neighbor_packet_template,
475 hi = vnet_get_sup_hw_interface (vnm, adj->rewrite_header.sw_if_index);
477 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
478 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
479 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
480 h->ip.src_address = src[0];
481 h->neighbor.target_address = dst[0];
483 clib_memcpy (h->link_layer_option.ethernet_address,
484 hi->hw_address, vec_len (hi->hw_address));
486 h->neighbor.icmp.checksum =
487 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
488 ASSERT (bogus_length == 0);
490 b = vlib_get_buffer (vm, bi);
491 vnet_buffer (b)->sw_if_index[VLIB_RX] =
492 vnet_buffer (b)->sw_if_index[VLIB_TX] = adj->rewrite_header.sw_if_index;
494 /* Add encapsulation string for software interface (e.g. ethernet header). */
495 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
496 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
499 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
500 u32 *to_next = vlib_frame_vector_args (f);
503 vlib_put_frame_to_node (vm, hi->output_node_index, f);
508 ip6_nd_mk_complete (adj_index_t ai, ip6_neighbor_t * nbr)
510 adj_nbr_update_rewrite (ai, ADJ_NBR_REWRITE_FLAG_COMPLETE,
511 ethernet_build_rewrite (vnet_get_main (),
512 nbr->key.sw_if_index,
513 adj_get_link_type (ai),
514 nbr->link_layer_address));
518 ip6_nd_mk_incomplete (adj_index_t ai)
520 ip_adjacency_t *adj = adj_get (ai);
522 adj_nbr_update_rewrite (ai,
523 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
524 ethernet_build_rewrite (vnet_get_main (),
527 adj_get_link_type (ai),
528 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
531 #define IP6_NBR_MK_KEY(k, sw_if_index, addr) \
533 k.sw_if_index = sw_if_index; \
534 k.ip6_address = *addr; \
538 static ip6_neighbor_t *
539 ip6_nd_find (u32 sw_if_index, const ip6_address_t * addr)
541 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
542 ip6_neighbor_t *n = NULL;
543 ip6_neighbor_key_t k;
546 IP6_NBR_MK_KEY (k, sw_if_index, addr);
548 p = mhash_get (&nm->neighbor_index_by_key, &k);
551 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
558 ip6_nd_mk_complete_walk (adj_index_t ai, void *ctx)
560 ip6_neighbor_t *nbr = ctx;
562 ip6_nd_mk_complete (ai, nbr);
564 return (ADJ_WALK_RC_CONTINUE);
568 ip6_nd_mk_incomplete_walk (adj_index_t ai, void *ctx)
570 ip6_nd_mk_incomplete (ai);
572 return (ADJ_WALK_RC_CONTINUE);
575 static clib_error_t *
576 ip6_neighbor_sw_interface_up_down (vnet_main_t * vnm,
577 u32 sw_if_index, u32 flags)
579 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
581 u32 i, *to_delete = 0;
584 pool_foreach (n, nm->neighbor_pool,
586 if (n->key.sw_if_index == sw_if_index)
587 vec_add1 (to_delete, n - nm->neighbor_pool);
591 if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
593 for (i = 0; i < vec_len (to_delete); i++)
595 n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
596 adj_nbr_walk_nh6 (n->key.sw_if_index, &n->key.ip6_address,
597 ip6_nd_mk_complete_walk, n);
602 for (i = 0; i < vec_len (to_delete); i++)
604 n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
605 adj_nbr_walk_nh6 (n->key.sw_if_index, &n->key.ip6_address,
606 ip6_nd_mk_incomplete_walk, NULL);
607 if (n->flags & IP6_NEIGHBOR_FLAG_STATIC)
609 ip6_neighbor_adj_fib_remove (n,
610 ip6_fib_table_get_index_for_sw_if_index
611 (n->key.sw_if_index));
612 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
613 pool_put (nm->neighbor_pool, n);
617 vec_free (to_delete);
621 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_neighbor_sw_interface_up_down);
624 ip6_ethernet_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
631 nbr = ip6_nd_find (sw_if_index, &adj->sub_type.nbr.next_hop.ip6);
633 switch (adj->lookup_next_index)
635 case IP_LOOKUP_NEXT_GLEAN:
636 adj_glean_update_rewrite (ai);
638 case IP_LOOKUP_NEXT_ARP:
641 adj_nbr_walk_nh6 (sw_if_index, &nbr->key.ip6_address,
642 ip6_nd_mk_complete_walk, nbr);
647 * no matching ND entry.
648 * construct the rewrite required to for an ND packet, and stick
649 * that in the adj's pipe to smoke.
651 adj_nbr_update_rewrite (ai,
652 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
653 ethernet_build_rewrite (vnm,
656 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
659 * since the FIB has added this adj for a route, it makes sense it may
660 * want to forward traffic sometime soon. Let's send a speculative ND.
661 * just one. If we were to do periodically that wouldn't be bad either,
662 * but that's more code than i'm prepared to write at this time for
663 * relatively little reward.
668 case IP_LOOKUP_NEXT_BCAST:
669 adj_nbr_update_rewrite (ai,
670 ADJ_NBR_REWRITE_FLAG_COMPLETE,
671 ethernet_build_rewrite (vnm,
674 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
676 case IP_LOOKUP_NEXT_MCAST:
679 * Construct a partial rewrite from the known ethernet mcast dest MAC
684 rewrite = ethernet_build_rewrite (vnm,
687 ethernet_ip6_mcast_dst_addr ());
690 * Complete the remaining fields of the adj's rewrite to direct the
691 * complete of the rewrite at switch time by copying in the IP
692 * dst address's bytes.
693 * Ofset is 2 bytes into the desintation address.
695 offset = vec_len (rewrite) - 2;
696 adj_mcast_update_rewrite (ai, rewrite, offset);
700 case IP_LOOKUP_NEXT_DROP:
701 case IP_LOOKUP_NEXT_PUNT:
702 case IP_LOOKUP_NEXT_LOCAL:
703 case IP_LOOKUP_NEXT_REWRITE:
704 case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
705 case IP_LOOKUP_NEXT_MIDCHAIN:
706 case IP_LOOKUP_NEXT_ICMP_ERROR:
707 case IP_LOOKUP_N_NEXT:
715 ip6_neighbor_adj_fib_add (ip6_neighbor_t * n, u32 fib_index)
717 if (ip6_address_is_link_local_unicast (&n->key.ip6_address))
719 ip6_ll_prefix_t pfx = {
720 .ilp_addr = n->key.ip6_address,
721 .ilp_sw_if_index = n->key.sw_if_index,
724 ip6_ll_table_entry_update (&pfx, FIB_ROUTE_PATH_FLAG_NONE);
730 .fp_proto = FIB_PROTOCOL_IP6,
731 .fp_addr.ip6 = n->key.ip6_address,
735 fib_table_entry_path_add (fib_index, &pfx, FIB_SOURCE_ADJ,
736 FIB_ENTRY_FLAG_ATTACHED,
737 DPO_PROTO_IP6, &pfx.fp_addr,
738 n->key.sw_if_index, ~0, 1, NULL,
739 FIB_ROUTE_PATH_FLAG_NONE);
743 static ip6_neighbor_t *
744 force_reuse_neighbor_entry (void)
747 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
749 u32 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
750 if (index == ~0) /* Try again from elt 0 */
751 index = pool_next_index (nm->neighbor_pool, index);
753 /* Find a non-static random entry to free up for reuse */
756 if ((count++ == 100) || (index == ~0))
757 return NULL; /* give up after 100 entries */
758 n = pool_elt_at_index (nm->neighbor_pool, index);
759 nm->neighbor_delete_rotor = index;
760 index = pool_next_index (nm->neighbor_pool, index);
762 while (n->flags & IP6_NEIGHBOR_FLAG_STATIC);
764 /* Remove ARP entry from its interface and update fib */
765 adj_nbr_walk_nh6 (n->key.sw_if_index,
766 &n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL);
767 ip6_neighbor_adj_fib_remove
768 (n, ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index));
769 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
775 vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
777 const ip6_address_t * a,
778 const u8 * link_layer_address,
779 uword n_bytes_link_layer_address,
780 int is_static, int is_no_fib_entry)
782 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
783 ip6_neighbor_key_t k;
784 ip6_neighbor_t *n = 0;
785 int make_new_nd_cache_entry = 1;
788 pending_resolution_t *pr, *mc;
790 if (vlib_get_thread_index ())
792 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
793 1 /* set new neighbor */ , is_static,
798 k.sw_if_index = sw_if_index;
799 k.ip6_address = a[0];
802 p = mhash_get (&nm->neighbor_index_by_key, &k);
805 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
806 /* Refuse to over-write static neighbor entry. */
807 if (!is_static && (n->flags & IP6_NEIGHBOR_FLAG_STATIC))
809 /* if MAC address match, still check to send event */
810 if (0 == memcmp (n->link_layer_address,
811 link_layer_address, n_bytes_link_layer_address))
812 goto check_customers;
815 make_new_nd_cache_entry = 0;
818 if (make_new_nd_cache_entry)
820 if (nm->limit_neighbor_cache_size &&
821 pool_elts (nm->neighbor_pool) >= nm->limit_neighbor_cache_size)
823 n = force_reuse_neighbor_entry ();
828 pool_get (nm->neighbor_pool, n);
830 mhash_set (&nm->neighbor_index_by_key, &k, n - nm->neighbor_pool,
833 n->fib_entry_index = FIB_NODE_INDEX_INVALID;
835 clib_memcpy (n->link_layer_address,
836 link_layer_address, n_bytes_link_layer_address);
839 * create the adj-fib. the entry in the FIB table for and to the peer.
841 if (!is_no_fib_entry)
843 ip6_neighbor_adj_fib_add
844 (n, ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index));
848 n->flags |= IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY;
854 * prevent a DoS attack from the data-plane that
855 * spams us with no-op updates to the MAC address
857 if (0 == memcmp (n->link_layer_address,
858 link_layer_address, n_bytes_link_layer_address))
860 n->time_last_updated = vlib_time_now (vm);
861 goto check_customers;
864 clib_memcpy (n->link_layer_address,
865 link_layer_address, n_bytes_link_layer_address);
868 /* Update time stamp and flags. */
869 n->time_last_updated = vlib_time_now (vm);
872 n->flags |= IP6_NEIGHBOR_FLAG_STATIC;
873 n->flags &= ~IP6_NEIGHBOR_FLAG_DYNAMIC;
877 n->flags |= IP6_NEIGHBOR_FLAG_DYNAMIC;
878 n->flags &= ~IP6_NEIGHBOR_FLAG_STATIC;
881 adj_nbr_walk_nh6 (sw_if_index,
882 &n->key.ip6_address, ip6_nd_mk_complete_walk, n);
885 /* Customer(s) waiting for this address to be resolved? */
886 p = mhash_get (&nm->pending_resolutions_by_address, a);
891 while (next_index != (u32) ~ 0)
893 pr = pool_elt_at_index (nm->pending_resolutions, next_index);
894 vlib_process_signal_event (vm, pr->node_index,
895 pr->type_opaque, pr->data);
896 next_index = pr->next_index;
897 pool_put (nm->pending_resolutions, pr);
900 mhash_unset (&nm->pending_resolutions_by_address, (void *) a, 0);
903 /* Customer(s) requesting ND event for this address? */
904 p = mhash_get (&nm->mac_changes_by_address, a);
909 while (next_index != (u32) ~ 0)
911 int (*fp) (u32, u8 *, u32, ip6_address_t *);
913 mc = pool_elt_at_index (nm->mac_changes, next_index);
914 fp = mc->data_callback;
916 /* Call the user's data callback, return 1 to suppress dup events */
919 (*fp) (mc->data, (u8 *) link_layer_address, sw_if_index,
922 * Signal the resolver process, as long as the user
923 * says they want to be notified
926 vlib_process_signal_event (vm, mc->node_index,
927 mc->type_opaque, mc->data);
928 next_index = mc->next_index;
936 vnet_unset_ip6_ethernet_neighbor (vlib_main_t * vm,
937 u32 sw_if_index, const ip6_address_t * a)
939 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
940 ip6_neighbor_key_t k;
945 if (vlib_get_thread_index ())
947 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, NULL,
948 0 /* unset */ , 0, 0);
952 k.sw_if_index = sw_if_index;
953 k.ip6_address = a[0];
956 p = mhash_get (&nm->neighbor_index_by_key, &k);
963 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
965 adj_nbr_walk_nh6 (sw_if_index,
966 &n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL);
967 ip6_neighbor_adj_fib_remove
968 (n, ip6_fib_table_get_index_for_sw_if_index (sw_if_index));
970 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
971 pool_put (nm->neighbor_pool, n);
977 static void ip6_neighbor_set_unset_rpc_callback
978 (ip6_neighbor_set_unset_rpc_args_t * a)
980 vlib_main_t *vm = vlib_get_main ();
982 vnet_set_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
983 a->link_layer_address, 6, a->is_static,
986 vnet_unset_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr);
990 ip6_neighbor_sort (void *a1, void *a2)
992 vnet_main_t *vnm = vnet_get_main ();
993 ip6_neighbor_t *n1 = a1, *n2 = a2;
995 cmp = vnet_sw_interface_compare (vnm, n1->key.sw_if_index,
996 n2->key.sw_if_index);
998 cmp = ip6_address_compare (&n1->key.ip6_address, &n2->key.ip6_address);
1003 ip6_neighbors_pool (void)
1005 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1006 return nm->neighbor_pool;
1010 ip6_neighbors_entries (u32 sw_if_index)
1012 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1013 ip6_neighbor_t *n, *ns = 0;
1016 pool_foreach (n, nm->neighbor_pool,
1018 if (sw_if_index != ~0 && n->key.sw_if_index != sw_if_index)
1020 vec_add1 (ns, n[0]);
1025 vec_sort_with_function (ns, ip6_neighbor_sort);
1029 static clib_error_t *
1030 show_ip6_neighbors (vlib_main_t * vm,
1031 unformat_input_t * input, vlib_cli_command_t * cmd)
1033 vnet_main_t *vnm = vnet_get_main ();
1034 ip6_neighbor_t *n, *ns;
1035 clib_error_t *error = 0;
1038 /* Filter entries by interface if given. */
1040 (void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index);
1042 ns = ip6_neighbors_entries (sw_if_index);
1045 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, 0);
1048 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, n);
1057 * This command is used to display the adjacent IPv6 hosts found via
1058 * neighbor discovery. Optionally, limit the output to the specified
1062 * Example of how to display the IPv6 neighbor adjacency table:
1063 * @cliexstart{show ip6 neighbors}
1064 * Time Address Flags Link layer Interface
1065 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
1066 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
1067 * 886.6654 ::1:1:c:0:9 S 02:fe:e4:45:27:5b GigabitEthernet3/0/0
1069 * Example of how to display the IPv6 neighbor adjacency table for given interface:
1070 * @cliexstart{show ip6 neighbors GigabitEthernet2/0/0}
1071 * Time Address Flags Link layer Interface
1072 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
1073 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
1077 VLIB_CLI_COMMAND (show_ip6_neighbors_command, static) = {
1078 .path = "show ip6 neighbors",
1079 .function = show_ip6_neighbors,
1080 .short_help = "show ip6 neighbors [<interface>]",
1084 static clib_error_t *
1085 set_ip6_neighbor (vlib_main_t * vm,
1086 unformat_input_t * input, vlib_cli_command_t * cmd)
1088 vnet_main_t *vnm = vnet_get_main ();
1094 int is_no_fib_entry = 0;
1097 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1099 /* intfc, ip6-address, mac-address */
1100 if (unformat (input, "%U %U %U",
1101 unformat_vnet_sw_interface, vnm, &sw_if_index,
1102 unformat_ip6_address, &addr,
1103 unformat_ethernet_address, mac_address))
1106 else if (unformat (input, "delete") || unformat (input, "del"))
1108 else if (unformat (input, "static"))
1110 else if (unformat (input, "no-fib-entry"))
1111 is_no_fib_entry = 1;
1117 return clib_error_return (0, "Missing interface, ip6 or hw address");
1120 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
1121 mac_address, sizeof (mac_address),
1122 is_static, is_no_fib_entry);
1124 vnet_unset_ip6_ethernet_neighbor (vm, sw_if_index, &addr);
1129 * This command is used to manually add an entry to the IPv6 neighbor
1130 * adjacency table. Optionally, the entry can be added as static. It is
1131 * also used to remove an entry from the table. Use the '<em>show ip6
1132 * neighbors</em>' command to display all learned and manually entered entries.
1135 * Example of how to add a static entry to the IPv6 neighbor adjacency table:
1136 * @cliexcmd{set ip6 neighbor GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b static}
1137 * Example of how to delete an entry from the IPv6 neighbor adjacency table:
1138 * @cliexcmd{set ip6 neighbor del GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b}
1141 VLIB_CLI_COMMAND (set_ip6_neighbor_command, static) =
1143 .path = "set ip6 neighbor",
1144 .function = set_ip6_neighbor,
1145 .short_help = "set ip6 neighbor [del] <interface> <ip6-address> <mac-address> [static]",
1151 ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP,
1152 ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY,
1153 ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
1154 } icmp6_neighbor_solicitation_or_advertisement_next_t;
1156 static_always_inline uword
1157 icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
1158 vlib_node_runtime_t * node,
1159 vlib_frame_t * frame,
1160 uword is_solicitation)
1162 vnet_main_t *vnm = vnet_get_main ();
1163 ip6_main_t *im = &ip6_main;
1164 uword n_packets = frame->n_vectors;
1165 u32 *from, *to_next;
1166 u32 n_left_from, n_left_to_next, next_index, n_advertisements_sent;
1167 icmp6_neighbor_discovery_option_type_t option_type;
1168 vlib_node_runtime_t *error_node =
1169 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1172 from = vlib_frame_vector_args (frame);
1173 n_left_from = n_packets;
1174 next_index = node->cached_next_index;
1176 if (node->flags & VLIB_NODE_FLAG_TRACE)
1177 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1179 sizeof (icmp6_input_trace_t));
1183 ? ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address
1184 : ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address);
1185 n_advertisements_sent = 0;
1187 while (n_left_from > 0)
1189 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1191 while (n_left_from > 0 && n_left_to_next > 0)
1195 icmp6_neighbor_solicitation_or_advertisement_header_t *h0;
1196 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1197 u32 bi0, options_len0, sw_if_index0, next0, error0;
1198 u32 ip6_sadd_link_local, ip6_sadd_unspecified;
1202 bi0 = to_next[0] = from[0];
1207 n_left_to_next -= 1;
1209 p0 = vlib_get_buffer (vm, bi0);
1210 ip0 = vlib_buffer_get_current (p0);
1211 h0 = ip6_next_header (ip0);
1213 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1215 error0 = ICMP6_ERROR_NONE;
1216 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1217 ip6_sadd_link_local =
1218 ip6_address_is_link_local_unicast (&ip0->src_address);
1219 ip6_sadd_unspecified =
1220 ip6_address_is_unspecified (&ip0->src_address);
1222 /* Check that source address is unspecified, link-local or else on-link. */
1223 if (!ip6_sadd_unspecified && !ip6_sadd_link_local)
1225 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1227 if (ADJ_INDEX_INVALID != src_adj_index0)
1229 ip_adjacency_t *adj0 = adj_get (src_adj_index0);
1231 /* Allow all realistic-looking rewrite adjacencies to pass */
1232 ni0 = adj0->lookup_next_index;
1233 is_rewrite0 = (ni0 >= IP_LOOKUP_NEXT_ARP) &&
1234 (ni0 < IP6_LOOKUP_N_NEXT);
1236 error0 = ((adj0->rewrite_header.sw_if_index != sw_if_index0
1239 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK
1245 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK;
1249 o0 = (void *) (h0 + 1);
1250 o0 = ((options_len0 == 8 && o0->header.type == option_type
1251 && o0->header.n_data_u64s == 1) ? o0 : 0);
1253 /* If src address unspecified or link local, donot learn neighbor MAC */
1254 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1255 !ip6_sadd_unspecified))
1257 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1260 &h0->target_address,
1261 o0->ethernet_address,
1262 sizeof (o0->ethernet_address),
1266 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1268 /* Check that target address is local to this router. */
1269 fib_node_index_t fei;
1273 ip6_fib_table_get_index_for_sw_if_index (sw_if_index0);
1275 if (~0 == fib_index)
1277 error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1281 if (ip6_address_is_link_local_unicast (&h0->target_address))
1283 fei = ip6_fib_table_lookup_exact_match
1284 (ip6_ll_fib_get (sw_if_index0),
1285 &h0->target_address, 128);
1289 fei = ip6_fib_table_lookup_exact_match (fib_index,
1290 &h0->target_address,
1294 if (FIB_NODE_INDEX_INVALID == fei)
1296 /* The target address is not in the FIB */
1298 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1302 if (FIB_ENTRY_FLAG_LOCAL &
1303 fib_entry_get_flags_for_source (fei,
1304 FIB_SOURCE_INTERFACE))
1306 /* It's an address that belongs to one of our interfaces
1310 if (fib_entry_is_sourced
1311 (fei, FIB_SOURCE_IP6_ND_PROXY) ||
1312 fib_entry_is_sourced (fei, FIB_SOURCE_IP6_ND))
1314 /* The address was added by IPv6 Proxy ND config.
1315 * We should only respond to these if the NS arrived on
1316 * the link that has a matching covering prefix */
1321 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1327 if (is_solicitation)
1328 next0 = (error0 != ICMP6_ERROR_NONE
1329 ? ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP
1330 : ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY);
1334 error0 = error0 == ICMP6_ERROR_NONE ?
1335 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_RX : error0;
1338 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1340 vnet_sw_interface_t *sw_if0;
1341 ethernet_interface_t *eth_if0;
1342 ethernet_header_t *eth0;
1344 /* dst address is either source address or the all-nodes mcast addr */
1345 if (!ip6_sadd_unspecified)
1346 ip0->dst_address = ip0->src_address;
1348 ip6_set_reserved_multicast_address (&ip0->dst_address,
1349 IP6_MULTICAST_SCOPE_link_local,
1350 IP6_MULTICAST_GROUP_ID_all_hosts);
1352 ip0->src_address = h0->target_address;
1353 ip0->hop_limit = 255;
1354 h0->icmp.type = ICMP6_neighbor_advertisement;
1356 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1357 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1359 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1362 clib_memcpy (o0->ethernet_address, eth_if0->address, 6);
1364 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
1367 h0->advertisement_flags = clib_host_to_net_u32
1368 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED
1369 | ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
1371 h0->icmp.checksum = 0;
1373 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1375 ASSERT (bogus_length == 0);
1377 /* Reuse current MAC header, copy SMAC to DMAC and
1378 * interface MAC to SMAC */
1379 vlib_buffer_advance (p0, -ethernet_buffer_header_size (p0));
1380 eth0 = vlib_buffer_get_current (p0);
1381 clib_memcpy (eth0->dst_address, eth0->src_address, 6);
1383 clib_memcpy (eth0->src_address, eth_if0->address, 6);
1385 /* Setup input and output sw_if_index for packet */
1386 ASSERT (vnet_buffer (p0)->sw_if_index[VLIB_RX] == sw_if_index0);
1387 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1388 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1389 vnet_main.local_interface_sw_if_index;
1391 n_advertisements_sent++;
1394 p0->error = error_node->errors[error0];
1396 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1397 to_next, n_left_to_next,
1401 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1404 /* Account for advertisements sent. */
1405 vlib_error_count (vm, error_node->node_index,
1406 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX,
1407 n_advertisements_sent);
1409 return frame->n_vectors;
1412 /* for "syslogging" - use elog for now */
1413 #define foreach_log_level \
1414 _ (DEBUG, "DEBUG") \
1415 _ (INFO, "INFORMATION") \
1416 _ (NOTICE, "NOTICE") \
1417 _ (WARNING, "WARNING") \
1419 _ (CRIT, "CRITICAL") \
1420 _ (ALERT, "ALERT") \
1421 _ (EMERG, "EMERGENCY")
1425 #define _(f,s) LOG_##f,
1430 static char *log_level_strings[] = {
1436 static int logmask = 1 << LOG_DEBUG;
1439 ip6_neighbor_syslog (vlib_main_t * vm, int priority, char *fmt, ...)
1441 /* just use elog for now */
1445 if ((priority > LOG_EMERG) || !(logmask & (1 << priority)))
1451 what = va_format (0, fmt, &va);
1453 ELOG_TYPE_DECLARE (e) =
1455 .format = "ip6 nd: (%s): %s",.format_args = "T4T4",};
1460 ed = ELOG_DATA (&vm->elog_main, e);
1461 ed->s[0] = elog_string (&vm->elog_main, log_level_strings[priority]);
1462 ed->s[1] = elog_string (&vm->elog_main, (char *) what);
1469 call_ip6_neighbor_callbacks (void *data,
1470 _vnet_ip6_neighbor_function_list_elt_t * elt)
1472 clib_error_t *error = 0;
1476 error = elt->fp (data);
1479 elt = elt->next_ip6_neighbor_function;
1485 /* ipv6 neighbor discovery - router advertisements */
1488 ICMP6_ROUTER_SOLICITATION_NEXT_DROP,
1489 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW,
1490 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX,
1491 ICMP6_ROUTER_SOLICITATION_N_NEXT,
1492 } icmp6_router_solicitation_or_advertisement_next_t;
1494 static_always_inline uword
1495 icmp6_router_solicitation (vlib_main_t * vm,
1496 vlib_node_runtime_t * node, vlib_frame_t * frame)
1498 vnet_main_t *vnm = vnet_get_main ();
1499 ip6_main_t *im = &ip6_main;
1500 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1501 uword n_packets = frame->n_vectors;
1502 u32 *from, *to_next;
1503 u32 n_left_from, n_left_to_next, next_index;
1504 u32 n_advertisements_sent = 0;
1507 icmp6_neighbor_discovery_option_type_t option_type;
1509 vlib_node_runtime_t *error_node =
1510 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1512 from = vlib_frame_vector_args (frame);
1513 n_left_from = n_packets;
1514 next_index = node->cached_next_index;
1516 if (node->flags & VLIB_NODE_FLAG_TRACE)
1517 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1519 sizeof (icmp6_input_trace_t));
1521 /* source may append his LL address */
1522 option_type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1524 while (n_left_from > 0)
1526 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1528 while (n_left_from > 0 && n_left_to_next > 0)
1532 ip6_radv_t *radv_info = 0;
1534 icmp6_neighbor_discovery_header_t *h0;
1535 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1537 u32 bi0, options_len0, sw_if_index0, next0, error0;
1538 u32 is_solicitation = 1, is_dropped = 0;
1539 u32 is_unspecified, is_link_local;
1541 bi0 = to_next[0] = from[0];
1546 n_left_to_next -= 1;
1548 p0 = vlib_get_buffer (vm, bi0);
1549 ip0 = vlib_buffer_get_current (p0);
1550 h0 = ip6_next_header (ip0);
1552 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1553 is_unspecified = ip6_address_is_unspecified (&ip0->src_address);
1555 ip6_address_is_link_local_unicast (&ip0->src_address);
1557 error0 = ICMP6_ERROR_NONE;
1558 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1560 /* check if solicitation (not from nd_timer node) */
1561 if (ip6_address_is_unspecified (&ip0->dst_address))
1562 is_solicitation = 0;
1564 /* Check that source address is unspecified, link-local or else on-link. */
1565 if (!is_unspecified && !is_link_local)
1567 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1569 if (ADJ_INDEX_INVALID != src_adj_index0)
1571 ip_adjacency_t *adj0 = adj_get (src_adj_index0);
1573 error0 = (adj0->rewrite_header.sw_if_index != sw_if_index0
1575 ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK
1580 error0 = ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK;
1584 /* check for source LL option and process */
1585 o0 = (void *) (h0 + 1);
1586 o0 = ((options_len0 == 8
1587 && o0->header.type == option_type
1588 && o0->header.n_data_u64s == 1) ? o0 : 0);
1590 /* if src address unspecified IGNORE any options */
1591 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1592 !is_unspecified && !is_link_local))
1594 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1596 o0->ethernet_address,
1597 sizeof (o0->ethernet_address),
1601 /* default is to drop */
1602 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1604 if (error0 == ICMP6_ERROR_NONE)
1606 vnet_sw_interface_t *sw_if0;
1607 ethernet_interface_t *eth_if0;
1610 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1611 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1613 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1615 /* only support ethernet interface type for now */
1617 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1620 if (error0 == ICMP6_ERROR_NONE)
1624 /* adjust the sizeof the buffer to just include the ipv6 header */
1625 p0->current_length -=
1627 sizeof (icmp6_neighbor_discovery_header_t));
1629 /* look up the radv_t information for this interface */
1630 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) >
1634 nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1637 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1642 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1645 if (error0 == ICMP6_ERROR_NONE)
1647 f64 now = vlib_time_now (vm);
1649 /* for solicited adverts - need to rate limit */
1650 if (is_solicitation)
1652 if (0 != radv_info->last_radv_time &&
1653 (now - radv_info->last_radv_time) <
1654 MIN_DELAY_BETWEEN_RAS)
1657 radv_info->last_radv_time = now;
1661 icmp6_router_advertisement_header_t rh;
1663 rh.icmp.type = ICMP6_router_advertisement;
1665 rh.icmp.checksum = 0;
1667 rh.current_hop_limit = radv_info->curr_hop_limit;
1668 rh.router_lifetime_in_sec =
1669 clib_host_to_net_u16
1670 (radv_info->adv_router_lifetime_in_sec);
1672 time_in_msec_between_retransmitted_neighbor_solicitations
1674 clib_host_to_net_u32 (radv_info->
1675 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
1676 rh.neighbor_reachable_time_in_msec =
1677 clib_host_to_net_u32 (radv_info->
1678 adv_neighbor_reachable_time_in_msec);
1681 (radv_info->adv_managed_flag) ?
1682 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP :
1685 ((radv_info->adv_other_flag) ?
1686 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP :
1690 u16 payload_length =
1691 sizeof (icmp6_router_advertisement_header_t);
1693 vlib_buffer_add_data (vm,
1694 vlib_buffer_get_free_list_index
1695 (p0), bi0, (void *) &rh,
1697 (icmp6_router_advertisement_header_t));
1699 if (radv_info->adv_link_layer_address)
1701 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
1705 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1706 h.header.n_data_u64s = 1;
1708 /* copy ll address */
1709 clib_memcpy (&h.ethernet_address[0],
1710 eth_if0->address, 6);
1712 vlib_buffer_add_data (vm,
1713 vlib_buffer_get_free_list_index
1714 (p0), bi0, (void *) &h,
1716 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t));
1720 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t);
1723 /* add MTU option */
1724 if (radv_info->adv_link_mtu)
1726 icmp6_neighbor_discovery_mtu_option_t h;
1730 clib_host_to_net_u32 (radv_info->adv_link_mtu);
1731 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu;
1732 h.header.n_data_u64s = 1;
1735 sizeof (icmp6_neighbor_discovery_mtu_option_t);
1737 vlib_buffer_add_data (vm,
1738 vlib_buffer_get_free_list_index
1739 (p0), bi0, (void *) &h,
1741 (icmp6_neighbor_discovery_mtu_option_t));
1744 /* add advertised prefix options */
1745 ip6_radv_prefix_t *pr_info;
1748 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
1750 if(pr_info->enabled &&
1751 (!pr_info->decrement_lifetime_flag
1752 || (pr_info->pref_lifetime_expires >0)))
1754 /* advertise this prefix */
1755 icmp6_neighbor_discovery_prefix_information_option_t h;
1757 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information;
1758 h.header.n_data_u64s = (sizeof(icmp6_neighbor_discovery_prefix_information_option_t) >> 3);
1760 h.dst_address_length = pr_info->prefix_len;
1762 h.flags = (pr_info->adv_on_link_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_FLAG_ON_LINK : 0;
1763 h.flags |= (pr_info->adv_autonomous_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_AUTO : 0;
1765 if(radv_info->cease_radv && pr_info->deprecated_prefix_flag)
1767 h.valid_time = clib_host_to_net_u32(MIN_ADV_VALID_LIFETIME);
1768 h.preferred_time = 0;
1772 if(pr_info->decrement_lifetime_flag)
1774 pr_info->adv_valid_lifetime_in_secs = ((pr_info->valid_lifetime_expires > now)) ?
1775 (pr_info->valid_lifetime_expires - now) : 0;
1777 pr_info->adv_pref_lifetime_in_secs = ((pr_info->pref_lifetime_expires > now)) ?
1778 (pr_info->pref_lifetime_expires - now) : 0;
1781 h.valid_time = clib_host_to_net_u32(pr_info->adv_valid_lifetime_in_secs);
1782 h.preferred_time = clib_host_to_net_u32(pr_info->adv_pref_lifetime_in_secs) ;
1786 clib_memcpy(&h.dst_address, &pr_info->prefix, sizeof(ip6_address_t));
1788 payload_length += sizeof( icmp6_neighbor_discovery_prefix_information_option_t);
1790 vlib_buffer_add_data (vm,
1791 vlib_buffer_get_free_list_index (p0),
1793 (void *)&h, sizeof(icmp6_neighbor_discovery_prefix_information_option_t));
1799 /* add additional options before here */
1801 /* finish building the router advertisement... */
1802 if (!is_unspecified && radv_info->send_unicast)
1804 ip0->dst_address = ip0->src_address;
1808 /* target address is all-nodes mcast addr */
1809 ip6_set_reserved_multicast_address
1811 IP6_MULTICAST_SCOPE_link_local,
1812 IP6_MULTICAST_GROUP_ID_all_hosts);
1815 /* source address MUST be the link-local address */
1816 ip0->src_address = radv_info->link_local_address;
1818 ip0->hop_limit = 255;
1819 ip0->payload_length =
1820 clib_host_to_net_u16 (payload_length);
1822 icmp6_router_advertisement_header_t *rh0 =
1823 (icmp6_router_advertisement_header_t *) (ip0 + 1);
1824 rh0->icmp.checksum =
1825 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1827 ASSERT (bogus_length == 0);
1829 /* setup output if and adjacency */
1830 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1831 vnet_main.local_interface_sw_if_index;
1833 if (is_solicitation)
1835 ethernet_header_t *eth0;
1836 /* Reuse current MAC header, copy SMAC to DMAC and
1837 * interface MAC to SMAC */
1838 vlib_buffer_reset (p0);
1839 eth0 = vlib_buffer_get_current (p0);
1840 clib_memcpy (eth0->dst_address, eth0->src_address,
1842 clib_memcpy (eth0->src_address, eth_if0->address,
1845 is_dropped ? next0 :
1846 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX;
1847 vnet_buffer (p0)->sw_if_index[VLIB_TX] =
1852 adj_index0 = radv_info->mcast_adj_index;
1853 if (adj_index0 == 0)
1854 error0 = ICMP6_ERROR_DST_LOOKUP_MISS;
1858 is_dropped ? next0 :
1859 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW;
1860 vnet_buffer (p0)->ip.adj_index[VLIB_TX] =
1864 p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
1866 radv_info->n_solicitations_dropped += is_dropped;
1867 radv_info->n_solicitations_rcvd += is_solicitation;
1869 if ((error0 == ICMP6_ERROR_NONE) && !is_dropped)
1871 radv_info->n_advertisements_sent++;
1872 n_advertisements_sent++;
1878 p0->error = error_node->errors[error0];
1880 if (error0 != ICMP6_ERROR_NONE)
1881 vlib_error_count (vm, error_node->node_index, error0, 1);
1883 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1884 to_next, n_left_to_next,
1889 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1892 /* Account for router advertisements sent. */
1893 vlib_error_count (vm, error_node->node_index,
1894 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_TX,
1895 n_advertisements_sent);
1897 return frame->n_vectors;
1900 /* validate advertised info for consistancy (see RFC-4861 section 6.2.7) - log any inconsistencies, packet will always be dropped */
1901 static_always_inline uword
1902 icmp6_router_advertisement (vlib_main_t * vm,
1903 vlib_node_runtime_t * node, vlib_frame_t * frame)
1905 vnet_main_t *vnm = vnet_get_main ();
1906 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1907 uword n_packets = frame->n_vectors;
1908 u32 *from, *to_next;
1909 u32 n_left_from, n_left_to_next, next_index;
1910 u32 n_advertisements_rcvd = 0;
1912 vlib_node_runtime_t *error_node =
1913 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1915 from = vlib_frame_vector_args (frame);
1916 n_left_from = n_packets;
1917 next_index = node->cached_next_index;
1919 if (node->flags & VLIB_NODE_FLAG_TRACE)
1920 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1922 sizeof (icmp6_input_trace_t));
1924 while (n_left_from > 0)
1926 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1928 while (n_left_from > 0 && n_left_to_next > 0)
1932 ip6_radv_t *radv_info = 0;
1933 icmp6_router_advertisement_header_t *h0;
1934 u32 bi0, options_len0, sw_if_index0, next0, error0;
1936 bi0 = to_next[0] = from[0];
1941 n_left_to_next -= 1;
1943 p0 = vlib_get_buffer (vm, bi0);
1944 ip0 = vlib_buffer_get_current (p0);
1945 h0 = ip6_next_header (ip0);
1947 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1949 error0 = ICMP6_ERROR_NONE;
1950 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1952 /* Check that source address is link-local */
1953 error0 = (!ip6_address_is_link_local_unicast (&ip0->src_address)) ?
1954 ICMP6_ERROR_ROUTER_ADVERTISEMENT_SOURCE_NOT_LINK_LOCAL : error0;
1956 /* default is to drop */
1957 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1959 n_advertisements_rcvd++;
1961 if (error0 == ICMP6_ERROR_NONE)
1963 vnet_sw_interface_t *sw_if0;
1964 ethernet_interface_t *eth_if0;
1966 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1967 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1969 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1971 /* only support ethernet interface type for now */
1973 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1976 if (error0 == ICMP6_ERROR_NONE)
1980 /* look up the radv_t information for this interface */
1981 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) >
1985 nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1988 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1993 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1996 if (error0 == ICMP6_ERROR_NONE)
1998 radv_info->keep_sending_rs = 0;
2002 r.sw_if_index = sw_if_index0;
2003 memcpy (r.router_address, &ip0->src_address, 16);
2004 r.current_hop_limit = h0->current_hop_limit;
2005 r.flags = h0->flags;
2006 r.router_lifetime_in_sec =
2007 clib_net_to_host_u16 (h0->router_lifetime_in_sec);
2008 r.neighbor_reachable_time_in_msec =
2009 clib_net_to_host_u32
2010 (h0->neighbor_reachable_time_in_msec);
2011 r.time_in_msec_between_retransmitted_neighbor_solicitations = clib_net_to_host_u32 (h0->time_in_msec_between_retransmitted_neighbor_solicitations);
2014 /* validate advertised information */
2015 if ((h0->current_hop_limit && radv_info->curr_hop_limit)
2016 && (h0->current_hop_limit !=
2017 radv_info->curr_hop_limit))
2019 ip6_neighbor_syslog (vm, LOG_WARNING,
2020 "our AdvCurHopLimit on %U doesn't agree with %U",
2021 format_vnet_sw_if_index_name,
2028 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP)
2029 != radv_info->adv_managed_flag)
2031 ip6_neighbor_syslog (vm, LOG_WARNING,
2032 "our AdvManagedFlag on %U doesn't agree with %U",
2033 format_vnet_sw_if_index_name,
2040 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP)
2041 != radv_info->adv_other_flag)
2043 ip6_neighbor_syslog (vm, LOG_WARNING,
2044 "our AdvOtherConfigFlag on %U doesn't agree with %U",
2045 format_vnet_sw_if_index_name,
2052 time_in_msec_between_retransmitted_neighbor_solicitations
2054 adv_time_in_msec_between_retransmitted_neighbor_solicitations)
2056 time_in_msec_between_retransmitted_neighbor_solicitations
2058 clib_host_to_net_u32 (radv_info->
2059 adv_time_in_msec_between_retransmitted_neighbor_solicitations)))
2061 ip6_neighbor_syslog (vm, LOG_WARNING,
2062 "our AdvRetransTimer on %U doesn't agree with %U",
2063 format_vnet_sw_if_index_name,
2069 if ((h0->neighbor_reachable_time_in_msec &&
2070 radv_info->adv_neighbor_reachable_time_in_msec) &&
2071 (h0->neighbor_reachable_time_in_msec !=
2072 clib_host_to_net_u32
2073 (radv_info->adv_neighbor_reachable_time_in_msec)))
2075 ip6_neighbor_syslog (vm, LOG_WARNING,
2076 "our AdvReachableTime on %U doesn't agree with %U",
2077 format_vnet_sw_if_index_name,
2083 /* check for MTU or prefix options or .. */
2084 u8 *opt_hdr = (u8 *) (h0 + 1);
2085 while (options_len0 > 0)
2087 icmp6_neighbor_discovery_option_header_t *o0 =
2088 (icmp6_neighbor_discovery_option_header_t *)
2090 int opt_len = o0->n_data_u64s << 3;
2091 icmp6_neighbor_discovery_option_type_t option_type =
2094 if (options_len0 < 2)
2096 ip6_neighbor_syslog (vm, LOG_ERR,
2097 "malformed RA packet on %U from %U",
2098 format_vnet_sw_if_index_name,
2107 ip6_neighbor_syslog (vm, LOG_ERR,
2108 " zero length option in RA on %U from %U",
2109 format_vnet_sw_if_index_name,
2115 else if (opt_len > options_len0)
2117 ip6_neighbor_syslog (vm, LOG_ERR,
2118 "option length in RA packet greater than total length on %U from %U",
2119 format_vnet_sw_if_index_name,
2126 options_len0 -= opt_len;
2129 switch (option_type)
2131 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address:
2133 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
2135 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
2138 if (opt_len < sizeof (*h))
2141 memcpy (r.slla, h->ethernet_address, 6);
2145 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu:
2147 icmp6_neighbor_discovery_mtu_option_t *h =
2148 (icmp6_neighbor_discovery_mtu_option_t
2151 if (opt_len < sizeof (*h))
2154 r.mtu = clib_net_to_host_u32 (h->mtu);
2156 if ((h->mtu && radv_info->adv_link_mtu) &&
2158 clib_host_to_net_u32
2159 (radv_info->adv_link_mtu)))
2161 ip6_neighbor_syslog (vm, LOG_WARNING,
2162 "our AdvLinkMTU on %U doesn't agree with %U",
2163 format_vnet_sw_if_index_name,
2171 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information:
2173 icmp6_neighbor_discovery_prefix_information_option_t
2175 (icmp6_neighbor_discovery_prefix_information_option_t
2178 /* validate advertised prefix options */
2179 ip6_radv_prefix_t *pr_info;
2180 u32 preferred, valid;
2182 if (opt_len < sizeof (*h))
2185 vec_validate (r.prefixes,
2186 vec_len (r.prefixes));
2187 ra_report_prefix_info_t *prefix =
2188 vec_elt_at_index (r.prefixes,
2189 vec_len (r.prefixes) - 1);
2192 clib_net_to_host_u32 (h->preferred_time);
2193 valid = clib_net_to_host_u32 (h->valid_time);
2195 prefix->preferred_time = preferred;
2196 prefix->valid_time = valid;
2197 prefix->flags = h->flags & 0xc0;
2198 prefix->dst_address_length =
2199 h->dst_address_length;
2200 prefix->dst_address = h->dst_address;
2202 /* look for matching prefix - if we our advertising it, it better be consistant */
2204 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
2208 ip6_address_mask_from_width(&mask, pr_info->prefix_len);
2210 if(pr_info->enabled &&
2211 (pr_info->prefix_len == h->dst_address_length) &&
2212 ip6_address_is_equal_masked (&pr_info->prefix, &h->dst_address, &mask))
2215 if(!pr_info->decrement_lifetime_flag &&
2216 valid != pr_info->adv_valid_lifetime_in_secs)
2218 ip6_neighbor_syslog(vm, LOG_WARNING,
2219 "our ADV validlifetime on %U for %U does not agree with %U",
2220 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
2221 format_ip6_address, &h->dst_address);
2223 if(!pr_info->decrement_lifetime_flag &&
2224 preferred != pr_info->adv_pref_lifetime_in_secs)
2226 ip6_neighbor_syslog(vm, LOG_WARNING,
2227 "our ADV preferredlifetime on %U for %U does not agree with %U",
2228 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
2229 format_ip6_address, &h->dst_address);
2247 p0->error = error_node->errors[error0];
2249 if (error0 != ICMP6_ERROR_NONE)
2250 vlib_error_count (vm, error_node->node_index, error0, 1);
2252 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2253 to_next, n_left_to_next,
2257 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2260 /* Account for router advertisements received. */
2261 vlib_error_count (vm, error_node->node_index,
2262 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_RX,
2263 n_advertisements_rcvd);
2265 return frame->n_vectors;
2269 random_f64_from_to (f64 from, f64 to)
2271 static u32 seed = 0;
2272 static u8 seed_set = 0;
2275 seed = random_default_seed ();
2278 return random_f64 (&seed) * (to - from) + from;
2282 get_mac_address (u32 sw_if_index, u8 * address)
2284 vnet_main_t *vnm = vnet_get_main ();
2285 vnet_hw_interface_t *hw_if = vnet_get_sup_hw_interface (vnm, sw_if_index);
2286 if (!hw_if->hw_address)
2288 clib_memcpy (address, hw_if->hw_address, 6);
2292 static inline vlib_buffer_t *
2293 create_buffer_for_rs (vlib_main_t * vm, ip6_radv_t * radv_info)
2297 vlib_buffer_free_list_t *fl;
2298 icmp6_router_solicitation_header_t *rh;
2303 sw_if_index = radv_info->sw_if_index;
2305 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
2307 clib_warning ("buffer allocation failure");
2311 p0 = vlib_get_buffer (vm, bi0);
2312 fl = vlib_buffer_get_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2313 vlib_buffer_init_for_free_list (p0, fl);
2314 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (p0);
2315 p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
2317 vnet_buffer (p0)->sw_if_index[VLIB_RX] = sw_if_index;
2318 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index;
2320 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
2322 rh = vlib_buffer_get_current (p0);
2323 p0->current_length = sizeof (*rh);
2325 rh->neighbor.icmp.type = ICMP6_router_solicitation;
2326 rh->neighbor.icmp.code = 0;
2327 rh->neighbor.icmp.checksum = 0;
2328 rh->neighbor.reserved_must_be_zero = 0;
2330 rh->link_layer_option.header.type =
2331 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2332 if (0 != get_mac_address (sw_if_index,
2333 rh->link_layer_option.ethernet_address))
2335 clib_warning ("interface with sw_if_index %u has no mac address",
2337 vlib_buffer_free (vm, &bi0, 1);
2340 rh->link_layer_option.header.n_data_u64s = 1;
2342 payload_length = sizeof (rh->neighbor) + sizeof (u64);
2344 rh->ip.ip_version_traffic_class_and_flow_label =
2345 clib_host_to_net_u32 (0x6 << 28);
2346 rh->ip.payload_length = clib_host_to_net_u16 (payload_length);
2347 rh->ip.protocol = IP_PROTOCOL_ICMP6;
2348 rh->ip.hop_limit = 255;
2349 rh->ip.src_address = radv_info->link_local_address;
2350 /* set address ff02::2 */
2351 rh->ip.dst_address.as_u64[0] = clib_host_to_net_u64 (0xff02L << 48);
2352 rh->ip.dst_address.as_u64[1] = clib_host_to_net_u64 (2);
2354 rh->neighbor.icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, p0,
2362 stop_sending_rs (vlib_main_t * vm, ip6_radv_t * ra)
2366 ra->keep_sending_rs = 0;
2369 bi0 = vlib_get_buffer_index (vm, ra->buffer);
2370 vlib_buffer_free (vm, &bi0, 1);
2376 check_send_rs (vlib_main_t * vm, ip6_radv_t * radv_info, f64 current_time,
2386 icmp6_send_router_solicitation_params_t *params;
2388 if (!radv_info->keep_sending_rs)
2391 params = &radv_info->params;
2393 if (radv_info->due_time > current_time)
2395 *due_time = radv_info->due_time;
2399 p0 = radv_info->buffer;
2401 next_index = ip6_rewrite_mcast_node.index;
2403 c0 = vlib_buffer_copy (vm, p0);
2404 ci0 = vlib_get_buffer_index (vm, c0);
2406 f = vlib_get_frame_to_node (vm, next_index);
2407 to_next = vlib_frame_vector_args (f);
2410 vlib_put_frame_to_node (vm, next_index, f);
2412 if (params->mrc != 0 && --radv_info->n_left == 0)
2413 stop_sending_rs (vm, radv_info);
2416 radv_info->sleep_interval =
2417 (2 + random_f64_from_to (-0.1, 0.1)) * radv_info->sleep_interval;
2418 if (radv_info->sleep_interval > params->mrt)
2419 radv_info->sleep_interval =
2420 (1 + random_f64_from_to (-0.1, 0.1)) * params->mrt;
2422 radv_info->due_time = current_time + radv_info->sleep_interval;
2424 if (params->mrd != 0
2425 && current_time > radv_info->start_time + params->mrd)
2426 stop_sending_rs (vm, radv_info);
2428 *due_time = radv_info->due_time;
2431 return radv_info->keep_sending_rs;
2435 send_rs_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
2438 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2439 ip6_radv_t *radv_info;
2440 uword *event_data = 0;
2441 f64 sleep_time = 1e9;
2448 vlib_process_wait_for_event_or_clock (vm, sleep_time);
2449 vlib_process_get_events (vm, &event_data);
2450 vec_reset_length (event_data);
2452 current_time = vlib_time_now (vm);
2455 due_time = current_time + 1e9;
2457 pool_foreach (radv_info, nm->if_radv_pool,
2459 if (check_send_rs (vm, radv_info, current_time, &dt)
2464 current_time = vlib_time_now (vm);
2466 while (due_time < current_time);
2468 sleep_time = due_time - current_time;
2475 VLIB_REGISTER_NODE (send_rs_process_node) = {
2476 .function = send_rs_process,
2477 .type = VLIB_NODE_TYPE_PROCESS,
2478 .name = "send-rs-process",
2483 icmp6_send_router_solicitation (vlib_main_t * vm, u32 sw_if_index, u8 stop,
2484 icmp6_send_router_solicitation_params_t *
2487 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2491 ASSERT (~0 != sw_if_index);
2493 rai = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2494 ra = pool_elt_at_index (nm->if_radv_pool, rai);
2496 stop_sending_rs (vm, ra);
2500 ra->keep_sending_rs = 1;
2501 ra->params = *params;
2502 ra->n_left = params->mrc;
2503 ra->start_time = vlib_time_now (vm);
2504 ra->sleep_interval = (1 + random_f64_from_to (-0.1, 0.1)) * params->irt;
2505 ra->due_time = 0; /* send first packet ASAP */
2506 ra->buffer = create_buffer_for_rs (vm, ra);
2508 ra->keep_sending_rs = 0;
2510 vlib_process_signal_event (vm, send_rs_process_node.index, 1, 0);
2515 * @brief Add a multicast Address to the advertised MLD set
2518 ip6_neighbor_add_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2520 ip6_mldp_group_t *mcast_group_info;
2523 /* lookup mldp info for this interface */
2524 p = mhash_get (&radv_info->address_to_mldp_index, addr);
2526 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2529 if (!mcast_group_info)
2533 pool_get (radv_info->mldp_group_pool, mcast_group_info);
2535 mi = mcast_group_info - radv_info->mldp_group_pool;
2536 mhash_set (&radv_info->address_to_mldp_index, addr, mi, /* old_value */
2539 mcast_group_info->type = 4;
2540 mcast_group_info->mcast_source_address_pool = 0;
2541 mcast_group_info->num_sources = 0;
2542 clib_memcpy (&mcast_group_info->mcast_address, addr,
2543 sizeof (ip6_address_t));
2548 * @brief Delete a multicast Address from the advertised MLD set
2551 ip6_neighbor_del_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2553 ip6_mldp_group_t *mcast_group_info;
2556 p = mhash_get (&radv_info->address_to_mldp_index, &addr);
2558 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2560 if (mcast_group_info)
2562 mhash_unset (&radv_info->address_to_mldp_index, &addr,
2564 pool_put (radv_info->mldp_group_pool, mcast_group_info);
2569 * @brief Add a multicast Address to the advertised MLD set
2572 ip6_neighbor_add_mld_grp (ip6_radv_t * a,
2573 ip6_multicast_address_scope_t scope,
2574 ip6_multicast_link_local_group_id_t group)
2578 ip6_set_reserved_multicast_address (&addr, scope, group);
2580 ip6_neighbor_add_mld_prefix (a, &addr);
2584 * @brief create and initialize router advertisement parameters with default
2585 * values for this intfc
2588 ip6_neighbor_sw_interface_add_del (vnet_main_t * vnm,
2589 u32 sw_if_index, u32 is_add)
2591 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2594 vnet_sw_interface_t *sw_if0;
2595 ethernet_interface_t *eth_if0 = 0;
2597 /* lookup radv container - ethernet interfaces only */
2598 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2599 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2600 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2605 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2607 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2611 a = pool_elt_at_index (nm->if_radv_pool, ri);
2615 ip6_radv_prefix_t *p;
2616 ip6_mldp_group_t *m;
2618 /* release the lock on the interface's mcast adj */
2619 adj_unlock (a->mcast_adj_index);
2621 /* clean up prefix and MDP pools */
2623 pool_flush(p, a->adv_prefixes_pool,
2625 mhash_unset (&a->address_to_prefix_index, &p->prefix, 0);
2627 pool_flush (m, a->mldp_group_pool,
2629 mhash_unset (&a->address_to_mldp_index, &m->mcast_address, 0);
2633 pool_free (a->mldp_group_pool);
2634 pool_free (a->adv_prefixes_pool);
2636 mhash_free (&a->address_to_prefix_index);
2637 mhash_free (&a->address_to_mldp_index);
2639 if (a->keep_sending_rs)
2640 a->keep_sending_rs = 0;
2642 pool_put (nm->if_radv_pool, a);
2643 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ~0;
2651 pool_get (nm->if_radv_pool, a);
2653 ri = a - nm->if_radv_pool;
2654 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ri;
2656 /* initialize default values (most of which are zero) */
2657 clib_memset (a, 0, sizeof (a[0]));
2659 a->sw_if_index = sw_if_index;
2660 a->max_radv_interval = DEF_MAX_RADV_INTERVAL;
2661 a->min_radv_interval = DEF_MIN_RADV_INTERVAL;
2662 a->curr_hop_limit = DEF_CURR_HOP_LIMIT;
2663 a->adv_router_lifetime_in_sec = DEF_DEF_RTR_LIFETIME;
2665 /* send ll address source address option */
2666 a->adv_link_layer_address = 1;
2668 a->min_delay_between_radv = MIN_DELAY_BETWEEN_RAS;
2669 a->max_delay_between_radv = MAX_DELAY_BETWEEN_RAS;
2670 a->max_rtr_default_lifetime = MAX_DEF_RTR_LIFETIME;
2671 a->seed = (u32) clib_cpu_time_now ();
2672 (void) random_u32 (&a->seed);
2673 a->randomizer = clib_cpu_time_now ();
2674 (void) random_u64 (&a->randomizer);
2676 a->initial_adverts_count = MAX_INITIAL_RTR_ADVERTISEMENTS;
2677 a->initial_adverts_sent = a->initial_adverts_count - 1;
2678 a->initial_adverts_interval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
2680 /* deafult is to send */
2683 /* fill in radv_info for this interface that will be needed later */
2685 vnet_sw_interface_get_mtu (vnm, sw_if_index, VNET_MTU_IP6);
2687 clib_memcpy (a->link_layer_address, eth_if0->address, 6);
2689 /* fill in default link-local address (this may be overridden) */
2690 ip6_link_local_address_from_ethernet_address
2691 (&a->link_local_address, eth_if0->address);
2693 mhash_init (&a->address_to_prefix_index, sizeof (uword),
2694 sizeof (ip6_address_t));
2695 mhash_init (&a->address_to_mldp_index, sizeof (uword),
2696 sizeof (ip6_address_t));
2698 a->mcast_adj_index = adj_mcast_add_or_lock (FIB_PROTOCOL_IP6,
2702 a->keep_sending_rs = 0;
2704 /* add multicast groups we will always be reporting */
2705 ip6_neighbor_add_mld_grp (a,
2706 IP6_MULTICAST_SCOPE_link_local,
2707 IP6_MULTICAST_GROUP_ID_all_hosts);
2708 ip6_neighbor_add_mld_grp (a,
2709 IP6_MULTICAST_SCOPE_link_local,
2710 IP6_MULTICAST_GROUP_ID_all_routers);
2711 ip6_neighbor_add_mld_grp (a,
2712 IP6_MULTICAST_SCOPE_link_local,
2713 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2719 /* send an mldpv2 report */
2721 ip6_neighbor_send_mldpv2_report (u32 sw_if_index)
2723 vnet_main_t *vnm = vnet_get_main ();
2724 vlib_main_t *vm = vnm->vlib_main;
2725 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2726 vnet_sw_interface_t *sw_if0;
2727 ethernet_interface_t *eth_if0;
2731 ip6_radv_t *radv_info;
2741 icmp6_multicast_listener_report_header_t *rh0;
2742 icmp6_multicast_listener_report_packet_t *rp0;
2744 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2745 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
2746 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2748 if (!eth_if0 || !vnet_sw_interface_is_admin_up (vnm, sw_if_index))
2751 /* look up the radv_t information for this interface */
2752 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2755 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2760 /* send report now - build a mldpv2 report packet */
2761 n_allocated = vlib_buffer_alloc_from_free_list (vm,
2764 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2765 if (PREDICT_FALSE (n_allocated == 0))
2767 clib_warning ("buffer allocation failure");
2771 b0 = vlib_get_buffer (vm, bo0);
2773 /* adjust the sizeof the buffer to just include the ipv6 header */
2774 b0->current_length = sizeof (icmp6_multicast_listener_report_packet_t);
2776 payload_length = sizeof (icmp6_multicast_listener_report_header_t);
2778 b0->error = ICMP6_ERROR_NONE;
2780 rp0 = vlib_buffer_get_current (b0);
2781 ip0 = (ip6_header_t *) & rp0->ip;
2782 rh0 = (icmp6_multicast_listener_report_header_t *) & rp0->report_hdr;
2784 clib_memset (rp0, 0x0, sizeof (icmp6_multicast_listener_report_packet_t));
2786 ip0->ip_version_traffic_class_and_flow_label =
2787 clib_host_to_net_u32 (0x6 << 28);
2789 ip0->protocol = IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS;
2790 /* for DEBUG - vnet driver won't seem to emit router alerts */
2791 /* ip0->protocol = IP_PROTOCOL_ICMP6; */
2794 rh0->icmp.type = ICMP6_multicast_listener_report_v2;
2796 /* source address MUST be the link-local address */
2797 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2798 ip0->src_address = radv_info->link_local_address;
2800 /* destination is all mldpv2 routers */
2801 ip6_set_reserved_multicast_address (&ip0->dst_address,
2802 IP6_MULTICAST_SCOPE_link_local,
2803 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2805 /* add reports here */
2806 ip6_mldp_group_t *m;
2807 int num_addr_records = 0;
2808 icmp6_multicast_address_record_t rr;
2810 /* fill in the hop-by-hop extension header (router alert) info */
2811 rh0->ext_hdr.next_hdr = IP_PROTOCOL_ICMP6;
2812 rh0->ext_hdr.n_data_u64s = 0;
2814 rh0->alert.type = IP6_MLDP_ALERT_TYPE;
2816 rh0->alert.value = 0;
2821 rh0->icmp.checksum = 0;
2824 pool_foreach (m, radv_info->mldp_group_pool,
2827 rr.aux_data_len_u32s = 0;
2828 rr.num_sources = clib_host_to_net_u16 (m->num_sources);
2829 clib_memcpy(&rr.mcast_addr, &m->mcast_address, sizeof(ip6_address_t));
2833 vlib_buffer_add_data
2834 (vm, vlib_buffer_get_free_list_index (b0), bo0,
2835 (void *)&rr, sizeof(icmp6_multicast_address_record_t));
2837 payload_length += sizeof( icmp6_multicast_address_record_t);
2842 rh0->num_addr_records = clib_host_to_net_u16 (num_addr_records);
2844 /* update lengths */
2845 ip0->payload_length = clib_host_to_net_u16 (payload_length);
2847 rh0->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0,
2849 ASSERT (bogus_length == 0);
2852 * OK to override w/ no regard for actual FIB, because
2853 * ip6-rewrite only looks at the adjacency.
2855 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
2856 vnet_main.local_interface_sw_if_index;
2858 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
2859 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
2861 vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite-mcast");
2863 f = vlib_get_frame_to_node (vm, node->index);
2864 to_next = vlib_frame_vector_args (f);
2868 vlib_put_frame_to_node (vm, node->index, f);
2873 VLIB_REGISTER_NODE (ip6_icmp_router_solicitation_node,static) =
2875 .function = icmp6_router_solicitation,
2876 .name = "icmp6-router-solicitation",
2878 .vector_size = sizeof (u32),
2880 .format_trace = format_icmp6_input_trace,
2882 .n_next_nodes = ICMP6_ROUTER_SOLICITATION_N_NEXT,
2884 [ICMP6_ROUTER_SOLICITATION_NEXT_DROP] = "ip6-drop",
2885 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW] = "ip6-rewrite-mcast",
2886 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX] = "interface-output",
2891 /* send a RA or update the timer info etc.. */
2893 ip6_neighbor_process_timer_event (vlib_main_t * vm,
2894 vlib_node_runtime_t * node,
2895 vlib_frame_t * frame)
2897 vnet_main_t *vnm = vnet_get_main ();
2898 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2899 ip6_radv_t *radv_info;
2900 vlib_frame_t *f = 0;
2901 u32 n_this_frame = 0;
2902 u32 n_left_to_next = 0;
2905 icmp6_router_solicitation_header_t *h0;
2907 f64 now = vlib_time_now (vm);
2909 /* Interface ip6 radv info list */
2911 pool_foreach (radv_info, nm->if_radv_pool,
2913 if( !vnet_sw_interface_is_admin_up (vnm, radv_info->sw_if_index))
2915 radv_info->initial_adverts_sent = radv_info->initial_adverts_count-1;
2916 radv_info->next_multicast_time = now;
2917 radv_info->last_multicast_time = now;
2918 radv_info->last_radv_time = 0;
2919 radv_info->all_routers_mcast = 0;
2923 /* Make sure that we've joined the all-routers multicast group */
2924 if(!radv_info->all_routers_mcast)
2926 /* send MDLP_REPORT_EVENT message */
2927 ip6_neighbor_send_mldpv2_report(radv_info->sw_if_index);
2928 radv_info->all_routers_mcast = 1;
2931 /* is it time to send a multicast RA on this interface? */
2932 if(radv_info->send_radv && (now >= radv_info->next_multicast_time))
2937 f64 rfn = (radv_info->max_radv_interval - radv_info->min_radv_interval) *
2938 random_f64 (&radv_info->seed) + radv_info->min_radv_interval;
2940 /* multicast send - compute next multicast send time */
2941 if( radv_info->initial_adverts_sent > 0)
2943 radv_info->initial_adverts_sent--;
2944 if(rfn > radv_info-> initial_adverts_interval)
2945 rfn = radv_info-> initial_adverts_interval;
2947 /* check to see if we are ceasing to send */
2948 if( radv_info->initial_adverts_sent == 0)
2949 if(radv_info->cease_radv)
2950 radv_info->send_radv = 0;
2953 radv_info->next_multicast_time = rfn + now;
2954 radv_info->last_multicast_time = now;
2956 /* send advert now - build a "solicted" router advert with unspecified source address */
2957 n_allocated = vlib_buffer_alloc_from_free_list
2958 (vm, &bo0, n_to_alloc, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2960 if (PREDICT_FALSE(n_allocated == 0))
2962 clib_warning ("buffer allocation failure");
2965 b0 = vlib_get_buffer (vm, bo0);
2966 b0->current_length = sizeof( icmp6_router_solicitation_header_t);
2967 b0->error = ICMP6_ERROR_NONE;
2968 vnet_buffer (b0)->sw_if_index[VLIB_RX] = radv_info->sw_if_index;
2970 h0 = vlib_buffer_get_current (b0);
2972 clib_memset (h0, 0, sizeof (icmp6_router_solicitation_header_t));
2974 h0->ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2975 h0->ip.payload_length = clib_host_to_net_u16 (sizeof (icmp6_router_solicitation_header_t)
2976 - STRUCT_OFFSET_OF (icmp6_router_solicitation_header_t, neighbor));
2977 h0->ip.protocol = IP_PROTOCOL_ICMP6;
2978 h0->ip.hop_limit = 255;
2980 /* set src/dst address as "unspecified" this marks this packet as internally generated rather than recieved */
2981 h0->ip.src_address.as_u64[0] = 0;
2982 h0->ip.src_address.as_u64[1] = 0;
2984 h0->ip.dst_address.as_u64[0] = 0;
2985 h0->ip.dst_address.as_u64[1] = 0;
2987 h0->neighbor.icmp.type = ICMP6_router_solicitation;
2989 if (PREDICT_FALSE(f == 0))
2991 f = vlib_get_frame_to_node (vm, ip6_icmp_router_solicitation_node.index);
2992 to_next = vlib_frame_vector_args (f);
2993 n_left_to_next = VLIB_FRAME_SIZE;
3002 if (PREDICT_FALSE(n_left_to_next == 0))
3004 f->n_vectors = n_this_frame;
3005 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
3014 ASSERT (n_this_frame);
3015 f->n_vectors = n_this_frame;
3016 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
3022 ip6_icmp_neighbor_discovery_event_process (vlib_main_t * vm,
3023 vlib_node_runtime_t * node,
3024 vlib_frame_t * frame)
3027 ip6_icmp_neighbor_discovery_event_data_t *event_data;
3029 /* init code here */
3033 vlib_process_wait_for_event_or_clock (vm, 1. /* seconds */ );
3035 event_data = vlib_process_get_event_data (vm, &event_type);
3039 /* No events found: timer expired. */
3040 /* process interface list and send RAs as appropriate, update timer info */
3041 ip6_neighbor_process_timer_event (vm, node, frame);
3048 case ICMP6_ND_EVENT_INIT:
3059 _vec_len (event_data) = 0;
3062 return frame->n_vectors;
3066 VLIB_REGISTER_NODE (ip6_icmp_router_advertisement_node,static) =
3068 .function = icmp6_router_advertisement,
3069 .name = "icmp6-router-advertisement",
3071 .vector_size = sizeof (u32),
3073 .format_trace = format_icmp6_input_trace,
3082 vlib_node_registration_t ip6_icmp_neighbor_discovery_event_node = {
3084 .function = ip6_icmp_neighbor_discovery_event_process,
3085 .name = "ip6-icmp-neighbor-discovery-event-process",
3086 .type = VLIB_NODE_TYPE_PROCESS,
3090 icmp6_neighbor_solicitation (vlib_main_t * vm,
3091 vlib_node_runtime_t * node, vlib_frame_t * frame)
3093 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
3094 /* is_solicitation */
3099 icmp6_neighbor_advertisement (vlib_main_t * vm,
3100 vlib_node_runtime_t * node,
3101 vlib_frame_t * frame)
3103 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
3104 /* is_solicitation */
3109 VLIB_REGISTER_NODE (ip6_icmp_neighbor_solicitation_node,static) =
3111 .function = icmp6_neighbor_solicitation,
3112 .name = "icmp6-neighbor-solicitation",
3114 .vector_size = sizeof (u32),
3116 .format_trace = format_icmp6_input_trace,
3118 .n_next_nodes = ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
3120 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP] = "ip6-drop",
3121 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY] = "interface-output",
3127 VLIB_REGISTER_NODE (ip6_icmp_neighbor_advertisement_node,static) =
3129 .function = icmp6_neighbor_advertisement,
3130 .name = "icmp6-neighbor-advertisement",
3132 .vector_size = sizeof (u32),
3134 .format_trace = format_icmp6_input_trace,
3145 IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
3146 IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX,
3147 IP6_DISCOVER_NEIGHBOR_N_NEXT,
3148 } ip6_discover_neighbor_next_t;
3152 IP6_DISCOVER_NEIGHBOR_ERROR_DROP,
3153 IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT,
3154 IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS,
3155 } ip6_discover_neighbor_error_t;
3158 ip6_discover_neighbor_inline (vlib_main_t * vm,
3159 vlib_node_runtime_t * node,
3160 vlib_frame_t * frame, int is_glean)
3162 vnet_main_t *vnm = vnet_get_main ();
3163 ip6_main_t *im = &ip6_main;
3164 ip_lookup_main_t *lm = &im->lookup_main;
3165 u32 *from, *to_next_drop;
3166 uword n_left_from, n_left_to_next_drop;
3168 u32 thread_index = vm->thread_index;
3170 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3172 if (node->flags & VLIB_NODE_FLAG_TRACE)
3173 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
3175 seed = throttle_seed (&im->nd_throttle, thread_index, vlib_time_now (vm));
3177 from = vlib_frame_vector_args (frame);
3178 n_left_from = frame->n_vectors;
3180 while (n_left_from > 0)
3182 vlib_get_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
3183 to_next_drop, n_left_to_next_drop);
3185 while (n_left_from > 0 && n_left_to_next_drop > 0)
3187 u32 pi0, adj_index0, sw_if_index0, drop0, r0, next0;
3188 vnet_hw_interface_t *hw_if0;
3189 ip6_radv_t *radv_info;
3190 ip_adjacency_t *adj0;
3196 p0 = vlib_get_buffer (vm, pi0);
3198 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
3200 ip0 = vlib_buffer_get_current (p0);
3202 adj0 = adj_get (adj_index0);
3206 ip0->dst_address.as_u64[0] =
3207 adj0->sub_type.nbr.next_hop.ip6.as_u64[0];
3208 ip0->dst_address.as_u64[1] =
3209 adj0->sub_type.nbr.next_hop.ip6.as_u64[1];
3212 sw_if_index0 = adj0->rewrite_header.sw_if_index;
3213 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
3215 /* combine the address and interface for a hash */
3216 r0 = ip6_address_hash_to_u64 (&ip0->dst_address) ^ sw_if_index0;
3218 drop0 = throttle_check (&im->nd_throttle, thread_index, r0, seed);
3222 to_next_drop[0] = pi0;
3224 n_left_to_next_drop -= 1;
3226 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
3228 /* If the interface is link-down, drop the pkt */
3229 if (!(hw_if0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
3232 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) > sw_if_index0)
3234 u32 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
3237 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3245 * the adj has been updated to a rewrite but the node the DPO that got
3246 * us here hasn't - yet. no big deal. we'll drop while we wait.
3248 if (IP_LOOKUP_NEXT_REWRITE == adj0->lookup_next_index)
3252 node->errors[drop0 ? IP6_DISCOVER_NEIGHBOR_ERROR_DROP
3253 : IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT];
3260 icmp6_neighbor_solicitation_header_t *h0;
3263 h0 = vlib_packet_template_get_packet
3264 (vm, &im->discover_neighbor_packet_template, &bi0);
3269 * Build ethernet header.
3270 * Choose source address based on destination lookup
3273 if (!ip6_src_address_for_packet (lm,
3276 &h0->ip.src_address))
3278 /* There is no address on the interface */
3280 node->errors[IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS];
3281 vlib_buffer_free (vm, &bi0, 1);
3286 * Destination address is a solicited node multicast address.
3287 * We need to fill in
3288 * the low 24 bits with low 24 bits of target's address.
3290 h0->ip.dst_address.as_u8[13] = ip0->dst_address.as_u8[13];
3291 h0->ip.dst_address.as_u8[14] = ip0->dst_address.as_u8[14];
3292 h0->ip.dst_address.as_u8[15] = ip0->dst_address.as_u8[15];
3294 h0->neighbor.target_address = ip0->dst_address;
3296 clib_memcpy (h0->link_layer_option.ethernet_address,
3297 hw_if0->hw_address, vec_len (hw_if0->hw_address));
3299 /* $$$$ appears we need this; why is the checksum non-zero? */
3300 h0->neighbor.icmp.checksum = 0;
3301 h0->neighbor.icmp.checksum =
3302 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h0->ip,
3305 ASSERT (bogus_length == 0);
3307 vlib_buffer_copy_trace_flag (vm, p0, bi0);
3308 b0 = vlib_get_buffer (vm, bi0);
3309 vnet_buffer (b0)->sw_if_index[VLIB_TX]
3310 = vnet_buffer (p0)->sw_if_index[VLIB_TX];
3312 vnet_buffer (b0)->ip.adj_index[VLIB_TX] =
3313 radv_info->mcast_adj_index;
3315 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
3316 next0 = IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX;
3318 vlib_set_next_frame_buffer (vm, node, next0, bi0);
3322 vlib_put_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
3323 n_left_to_next_drop);
3326 return frame->n_vectors;
3330 ip6_discover_neighbor (vlib_main_t * vm,
3331 vlib_node_runtime_t * node, vlib_frame_t * frame)
3333 return (ip6_discover_neighbor_inline (vm, node, frame, 0));
3337 ip6_glean (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3339 return (ip6_discover_neighbor_inline (vm, node, frame, 1));
3342 static char *ip6_discover_neighbor_error_strings[] = {
3343 [IP6_DISCOVER_NEIGHBOR_ERROR_DROP] = "address overflow drops",
3344 [IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT] = "neighbor solicitations sent",
3345 [IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS]
3346 = "no source address for ND solicitation",
3350 VLIB_REGISTER_NODE (ip6_glean_node) =
3352 .function = ip6_glean,
3353 .name = "ip6-glean",
3354 .vector_size = sizeof (u32),
3355 .format_trace = format_ip6_forward_next_trace,
3356 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
3357 .error_strings = ip6_discover_neighbor_error_strings,
3358 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
3361 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "ip6-drop",
3362 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "ip6-rewrite-mcast",
3365 VLIB_REGISTER_NODE (ip6_discover_neighbor_node) =
3367 .function = ip6_discover_neighbor,
3368 .name = "ip6-discover-neighbor",
3369 .vector_size = sizeof (u32),
3370 .format_trace = format_ip6_forward_next_trace,
3371 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
3372 .error_strings = ip6_discover_neighbor_error_strings,
3373 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
3376 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "ip6-drop",
3377 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "ip6-rewrite-mcast",
3382 /* API support functions */
3384 ip6_neighbor_ra_config (vlib_main_t * vm, u32 sw_if_index,
3385 u8 suppress, u8 managed, u8 other,
3386 u8 ll_option, u8 send_unicast, u8 cease,
3387 u8 use_lifetime, u32 lifetime,
3388 u32 initial_count, u32 initial_interval,
3389 u32 max_interval, u32 min_interval, u8 is_no)
3391 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3395 /* look up the radv_t information for this interface */
3396 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3398 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3399 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
3404 ip6_radv_t *radv_info;
3405 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3407 if ((max_interval != 0) && (min_interval == 0))
3408 min_interval = .75 * max_interval;
3412 0) ? ((is_no) ? DEF_MAX_RADV_INTERVAL : max_interval) :
3413 radv_info->max_radv_interval;
3416 0) ? ((is_no) ? DEF_MIN_RADV_INTERVAL : min_interval) :
3417 radv_info->min_radv_interval;
3420 0) ? ((is_no) ? DEF_DEF_RTR_LIFETIME : lifetime) :
3421 radv_info->adv_router_lifetime_in_sec;
3425 if (lifetime > MAX_DEF_RTR_LIFETIME)
3426 lifetime = MAX_DEF_RTR_LIFETIME;
3428 if (lifetime <= max_interval)
3429 return VNET_API_ERROR_INVALID_VALUE;
3432 if (min_interval != 0)
3434 if ((min_interval > .75 * max_interval) || (min_interval < 3))
3435 return VNET_API_ERROR_INVALID_VALUE;
3438 if ((initial_count > MAX_INITIAL_RTR_ADVERTISEMENTS) ||
3439 (initial_interval > MAX_INITIAL_RTR_ADVERT_INTERVAL))
3440 return VNET_API_ERROR_INVALID_VALUE;
3443 if "flag" is set and is_no is true then restore default value else set value corresponding to "flag"
3444 if "flag" is clear don't change corresponding value
3446 radv_info->send_radv =
3447 (suppress != 0) ? ((is_no != 0) ? 1 : 0) : radv_info->send_radv;
3448 radv_info->adv_managed_flag =
3449 (managed != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_managed_flag;
3450 radv_info->adv_other_flag =
3451 (other != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_other_flag;
3452 radv_info->adv_link_layer_address =
3454 0) ? ((is_no) ? 1 : 0) : radv_info->adv_link_layer_address;
3455 radv_info->send_unicast =
3456 (send_unicast != 0) ? ((is_no) ? 0 : 1) : radv_info->send_unicast;
3457 radv_info->cease_radv =
3458 (cease != 0) ? ((is_no) ? 0 : 1) : radv_info->cease_radv;
3460 radv_info->min_radv_interval = min_interval;
3461 radv_info->max_radv_interval = max_interval;
3462 radv_info->adv_router_lifetime_in_sec = lifetime;
3464 radv_info->initial_adverts_count =
3466 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERTISEMENTS : initial_count) :
3467 radv_info->initial_adverts_count;
3468 radv_info->initial_adverts_interval =
3469 (initial_interval !=
3470 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERT_INTERVAL : initial_interval) :
3471 radv_info->initial_adverts_interval;
3474 if ((cease != 0) && (is_no))
3475 radv_info->send_radv = 1;
3477 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
3478 radv_info->next_multicast_time = vlib_time_now (vm);
3479 radv_info->last_multicast_time = vlib_time_now (vm);
3480 radv_info->last_radv_time = 0;
3486 ip6_neighbor_ra_prefix (vlib_main_t * vm, u32 sw_if_index,
3487 ip6_address_t * prefix_addr, u8 prefix_len,
3488 u8 use_default, u32 val_lifetime, u32 pref_lifetime,
3489 u8 no_advertise, u8 off_link, u8 no_autoconfig,
3490 u8 no_onlink, u8 is_no)
3492 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3497 /* look up the radv_t information for this interface */
3498 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3501 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3503 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
3507 f64 now = vlib_time_now (vm);
3508 ip6_radv_t *radv_info;
3509 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3511 /* prefix info add, delete or update */
3512 ip6_radv_prefix_t *prefix;
3514 /* lookup prefix info for this address on this interface */
3515 uword *p = mhash_get (&radv_info->address_to_prefix_index, prefix_addr);
3517 prefix = p ? pool_elt_at_index (radv_info->adv_prefixes_pool, p[0]) : 0;
3523 return VNET_API_ERROR_INVALID_VALUE; /* invalid prefix */
3525 if (prefix->prefix_len != prefix_len)
3526 return VNET_API_ERROR_INVALID_VALUE_2;
3528 /* FIXME - Should the DP do this or the CP ? */
3529 /* do specific delete processing here before returning */
3530 /* try to remove from routing table */
3532 mhash_unset (&radv_info->address_to_prefix_index, prefix_addr,
3534 pool_put (radv_info->adv_prefixes_pool, prefix);
3536 radv_info->initial_adverts_sent =
3537 radv_info->initial_adverts_count - 1;
3538 radv_info->next_multicast_time = vlib_time_now (vm);
3539 radv_info->last_multicast_time = vlib_time_now (vm);
3540 radv_info->last_radv_time = 0;
3544 /* adding or changing */
3549 pool_get (radv_info->adv_prefixes_pool, prefix);
3550 pi = prefix - radv_info->adv_prefixes_pool;
3551 mhash_set (&radv_info->address_to_prefix_index, prefix_addr, pi,
3554 clib_memset (prefix, 0x0, sizeof (ip6_radv_prefix_t));
3556 prefix->prefix_len = prefix_len;
3557 clib_memcpy (&prefix->prefix, prefix_addr, sizeof (ip6_address_t));
3559 /* initialize default values */
3560 prefix->adv_on_link_flag = 1; /* L bit set */
3561 prefix->adv_autonomous_flag = 1; /* A bit set */
3562 prefix->adv_valid_lifetime_in_secs = DEF_ADV_VALID_LIFETIME;
3563 prefix->adv_pref_lifetime_in_secs = DEF_ADV_PREF_LIFETIME;
3564 prefix->enabled = 1;
3565 prefix->decrement_lifetime_flag = 1;
3566 prefix->deprecated_prefix_flag = 1;
3570 /* FIXME - Should the DP do this or the CP ? */
3571 /* insert prefix into routing table as a connected prefix */
3580 if (prefix->prefix_len != prefix_len)
3581 return VNET_API_ERROR_INVALID_VALUE_2;
3585 /* FIXME - Should the DP do this or the CP ? */
3586 /* remove from routing table if already there */
3590 if ((val_lifetime == ~0) || (pref_lifetime == ~0))
3592 prefix->adv_valid_lifetime_in_secs = ~0;
3593 prefix->adv_pref_lifetime_in_secs = ~0;
3594 prefix->decrement_lifetime_flag = 0;
3598 prefix->adv_valid_lifetime_in_secs = val_lifetime;;
3599 prefix->adv_pref_lifetime_in_secs = pref_lifetime;
3602 /* copy remaining */
3603 prefix->enabled = !(no_advertise != 0);
3604 prefix->adv_on_link_flag = !((off_link != 0) || (no_onlink != 0));
3605 prefix->adv_autonomous_flag = !(no_autoconfig != 0);
3609 /* fill in the expiration times */
3610 prefix->valid_lifetime_expires =
3611 now + prefix->adv_valid_lifetime_in_secs;
3612 prefix->pref_lifetime_expires = now + prefix->adv_pref_lifetime_in_secs;
3614 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
3615 radv_info->next_multicast_time = vlib_time_now (vm);
3616 radv_info->last_multicast_time = vlib_time_now (vm);
3617 radv_info->last_radv_time = 0;
3623 ip6_neighbor_cmd (vlib_main_t * vm, unformat_input_t * main_input,
3624 vlib_cli_command_t * cmd)
3626 vnet_main_t *vnm = vnet_get_main ();
3627 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3628 clib_error_t *error = 0;
3630 u8 suppress = 0, managed = 0, other = 0;
3631 u8 suppress_ll_option = 0, send_unicast = 0, cease = 0;
3632 u8 use_lifetime = 0;
3633 u32 sw_if_index, ra_lifetime = 0, ra_initial_count =
3634 0, ra_initial_interval = 0;
3635 u32 ra_max_interval = 0, ra_min_interval = 0;
3637 unformat_input_t _line_input, *line_input = &_line_input;
3638 vnet_sw_interface_t *sw_if0;
3640 int add_radv_info = 1;
3641 __attribute__ ((unused)) ip6_radv_t *radv_info = 0;
3642 ip6_address_t ip6_addr;
3646 /* Get a line of input. */
3647 if (!unformat_user (main_input, unformat_line_input, line_input))
3650 /* get basic radv info for this interface */
3651 if (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3654 if (unformat_user (line_input,
3655 unformat_vnet_sw_interface, vnm, &sw_if_index))
3658 ethernet_interface_t *eth_if0 = 0;
3660 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
3661 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
3663 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
3668 clib_error_return (0, "Interface must be of ethernet type");
3672 /* look up the radv_t information for this interface */
3673 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3676 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3680 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3684 error = clib_error_return (0, "unknown interface %U'",
3685 format_unformat_error, line_input);
3691 error = clib_error_return (0, "invalid interface name %U'",
3692 format_unformat_error, line_input);
3697 /* get the rest of the command */
3698 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3700 if (unformat (line_input, "no"))
3702 else if (unformat (line_input, "prefix %U/%d",
3703 unformat_ip6_address, &ip6_addr, &addr_len))
3708 else if (unformat (line_input, "ra-managed-config-flag"))
3713 else if (unformat (line_input, "ra-other-config-flag"))
3718 else if (unformat (line_input, "ra-suppress") ||
3719 unformat (line_input, "ra-surpress"))
3724 else if (unformat (line_input, "ra-suppress-link-layer") ||
3725 unformat (line_input, "ra-surpress-link-layer"))
3727 suppress_ll_option = 1;
3730 else if (unformat (line_input, "ra-send-unicast"))
3735 else if (unformat (line_input, "ra-lifetime"))
3737 if (!unformat (line_input, "%d", &ra_lifetime))
3739 error = unformat_parse_error (line_input);
3745 else if (unformat (line_input, "ra-initial"))
3748 (line_input, "%d %d", &ra_initial_count, &ra_initial_interval))
3750 error = unformat_parse_error (line_input);
3755 else if (unformat (line_input, "ra-interval"))
3757 if (!unformat (line_input, "%d", &ra_max_interval))
3759 error = unformat_parse_error (line_input);
3763 if (!unformat (line_input, "%d", &ra_min_interval))
3764 ra_min_interval = 0;
3767 else if (unformat (line_input, "ra-cease"))
3774 error = unformat_parse_error (line_input);
3781 ip6_neighbor_ra_config (vm, sw_if_index,
3782 suppress, managed, other,
3783 suppress_ll_option, send_unicast, cease,
3784 use_lifetime, ra_lifetime,
3785 ra_initial_count, ra_initial_interval,
3786 ra_max_interval, ra_min_interval, is_no);
3790 u32 valid_lifetime_in_secs = 0;
3791 u32 pref_lifetime_in_secs = 0;
3792 u8 use_prefix_default_values = 0;
3793 u8 no_advertise = 0;
3795 u8 no_autoconfig = 0;
3798 /* get the rest of the command */
3799 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3801 if (unformat (line_input, "default"))
3803 use_prefix_default_values = 1;
3806 else if (unformat (line_input, "infinite"))
3808 valid_lifetime_in_secs = ~0;
3809 pref_lifetime_in_secs = ~0;
3812 else if (unformat (line_input, "%d %d", &valid_lifetime_in_secs,
3813 &pref_lifetime_in_secs))
3820 /* get the rest of the command */
3821 while (!use_prefix_default_values &&
3822 unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3824 if (unformat (line_input, "no-advertise"))
3826 else if (unformat (line_input, "off-link"))
3828 else if (unformat (line_input, "no-autoconfig"))
3830 else if (unformat (line_input, "no-onlink"))
3834 error = unformat_parse_error (line_input);
3839 ip6_neighbor_ra_prefix (vm, sw_if_index,
3840 &ip6_addr, addr_len,
3841 use_prefix_default_values,
3842 valid_lifetime_in_secs,
3843 pref_lifetime_in_secs,
3845 off_link, no_autoconfig, no_onlink, is_no);
3849 unformat_free (line_input);
3855 ip6_print_addrs (vlib_main_t * vm, u32 * addrs)
3857 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3860 for (i = 0; i < vec_len (addrs); i++)
3862 ip_interface_address_t *a =
3863 pool_elt_at_index (lm->if_address_pool, addrs[i]);
3864 ip6_address_t *address = ip_interface_address_get_address (lm, a);
3866 vlib_cli_output (vm, "\t\t%U/%d",
3867 format_ip6_address, address, a->address_length);
3871 static clib_error_t *
3872 show_ip6_interface_cmd (vlib_main_t * vm,
3873 unformat_input_t * input, vlib_cli_command_t * cmd)
3875 vnet_main_t *vnm = vnet_get_main ();
3876 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3877 clib_error_t *error = 0;
3882 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3886 /* look up the radv_t information for this interface */
3887 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3890 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3894 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3895 ip6_radv_t *radv_info;
3896 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3898 vlib_cli_output (vm, "%U is admin %s\n",
3899 format_vnet_sw_interface_name, vnm,
3900 vnet_get_sw_interface (vnm, sw_if_index),
3901 (vnet_sw_interface_is_admin_up (vnm, sw_if_index) ?
3905 u32 *link_scope = 0, *global_scope = 0;
3906 u32 *local_scope = 0, *unknown_scope = 0;
3907 ip_interface_address_t *a;
3909 vec_validate_init_empty (lm->if_address_pool_index_by_sw_if_index,
3911 ai = lm->if_address_pool_index_by_sw_if_index[sw_if_index];
3913 while (ai != (u32) ~ 0)
3915 a = pool_elt_at_index (lm->if_address_pool, ai);
3916 ip6_address_t *address =
3917 ip_interface_address_get_address (lm, a);
3919 if (ip6_address_is_link_local_unicast (address))
3920 vec_add1 (link_scope, ai);
3921 else if (ip6_address_is_global_unicast (address))
3922 vec_add1 (global_scope, ai);
3923 else if (ip6_address_is_local_unicast (address))
3924 vec_add1 (local_scope, ai);
3926 vec_add1 (unknown_scope, ai);
3928 ai = a->next_this_sw_interface;
3931 if (vec_len (link_scope))
3933 vlib_cli_output (vm, "\tLink-local address(es):\n");
3934 ip6_print_addrs (vm, link_scope);
3935 vec_free (link_scope);
3938 if (vec_len (local_scope))
3940 vlib_cli_output (vm, "\tLocal unicast address(es):\n");
3941 ip6_print_addrs (vm, local_scope);
3942 vec_free (local_scope);
3945 if (vec_len (global_scope))
3947 vlib_cli_output (vm, "\tGlobal unicast address(es):\n");
3948 ip6_print_addrs (vm, global_scope);
3949 vec_free (global_scope);
3952 if (vec_len (unknown_scope))
3954 vlib_cli_output (vm, "\tOther-scope address(es):\n");
3955 ip6_print_addrs (vm, unknown_scope);
3956 vec_free (unknown_scope);
3959 vlib_cli_output (vm, "\tLink-local address(es):\n");
3960 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
3961 &radv_info->link_local_address);
3963 vlib_cli_output (vm, "\tJoined group address(es):\n");
3964 ip6_mldp_group_t *m;
3966 pool_foreach (m, radv_info->mldp_group_pool,
3968 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
3973 vlib_cli_output (vm, "\tAdvertised Prefixes:\n");
3974 ip6_radv_prefix_t *p;
3976 pool_foreach (p, radv_info->adv_prefixes_pool,
3978 vlib_cli_output (vm, "\t\tprefix %U, length %d\n",
3979 format_ip6_address, &p->prefix, p->prefix_len);
3983 vlib_cli_output (vm, "\tMTU is %d\n", radv_info->adv_link_mtu);
3984 vlib_cli_output (vm, "\tICMP error messages are unlimited\n");
3985 vlib_cli_output (vm, "\tICMP redirects are disabled\n");
3986 vlib_cli_output (vm, "\tICMP unreachables are not sent\n");
3987 vlib_cli_output (vm, "\tND DAD is disabled\n");
3988 //vlib_cli_output (vm, "\tND reachable time is %d milliseconds\n",);
3989 vlib_cli_output (vm, "\tND advertised reachable time is %d\n",
3990 radv_info->adv_neighbor_reachable_time_in_msec);
3991 vlib_cli_output (vm,
3992 "\tND advertised retransmit interval is %d (msec)\n",
3994 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
3996 u32 ra_interval = radv_info->max_radv_interval;
3997 u32 ra_interval_min = radv_info->min_radv_interval;
3998 vlib_cli_output (vm,
3999 "\tND router advertisements are sent every %d seconds (min interval is %d)\n",
4000 ra_interval, ra_interval_min);
4001 vlib_cli_output (vm,
4002 "\tND router advertisements live for %d seconds\n",
4003 radv_info->adv_router_lifetime_in_sec);
4004 vlib_cli_output (vm,
4005 "\tHosts %s stateless autoconfig for addresses\n",
4006 (radv_info->adv_managed_flag) ? "use" :
4008 vlib_cli_output (vm, "\tND router advertisements sent %d\n",
4009 radv_info->n_advertisements_sent);
4010 vlib_cli_output (vm, "\tND router solicitations received %d\n",
4011 radv_info->n_solicitations_rcvd);
4012 vlib_cli_output (vm, "\tND router solicitations dropped %d\n",
4013 radv_info->n_solicitations_dropped);
4017 error = clib_error_return (0, "IPv6 not enabled on interface",
4018 format_unformat_error, input);
4026 * This command is used to display various IPv6 attributes on a given
4030 * Example of how to display IPv6 settings:
4031 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
4032 * GigabitEthernet2/0/0 is admin up
4033 * Link-local address(es):
4035 * Joined group address(es):
4040 * Advertised Prefixes:
4041 * prefix fe80::fe:28ff:fe9c:75b3, length 64
4043 * ICMP error messages are unlimited
4044 * ICMP redirects are disabled
4045 * ICMP unreachables are not sent
4046 * ND DAD is disabled
4047 * ND advertised reachable time is 0
4048 * ND advertised retransmit interval is 0 (msec)
4049 * ND router advertisements are sent every 200 seconds (min interval is 150)
4050 * ND router advertisements live for 600 seconds
4051 * Hosts use stateless autoconfig for addresses
4052 * ND router advertisements sent 19336
4053 * ND router solicitations received 0
4054 * ND router solicitations dropped 0
4056 * Example of output if IPv6 is not enabled on the interface:
4057 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
4058 * show ip6 interface: IPv6 not enabled on interface
4062 VLIB_CLI_COMMAND (show_ip6_interface_command, static) =
4064 .path = "show ip6 interface",
4065 .function = show_ip6_interface_cmd,
4066 .short_help = "show ip6 interface <interface>",
4071 disable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
4073 clib_error_t *error = 0;
4074 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4077 /* look up the radv_t information for this interface */
4078 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
4080 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4082 /* if not created - do nothing */
4085 ip6_radv_t *radv_info;
4087 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4089 /* check radv_info ref count for other ip6 addresses on this interface */
4090 /* This implicitly excludes the link local address */
4091 if (radv_info->ref_count == 0)
4093 /* essentially "disables" ipv6 on this interface */
4094 ip6_ll_prefix_t ilp = {
4095 .ilp_addr = radv_info->link_local_address,
4096 .ilp_sw_if_index = sw_if_index,
4098 ip6_ll_table_entry_delete (&ilp);
4099 ip6_sw_interface_enable_disable (sw_if_index, 0);
4100 ip6_mfib_interface_enable_disable (sw_if_index, 0);
4101 ip6_neighbor_sw_interface_add_del (vnet_get_main (), sw_if_index,
4109 ip6_interface_enabled (vlib_main_t * vm, u32 sw_if_index)
4111 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4114 /* look up the radv_t information for this interface */
4115 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
4118 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4124 enable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
4126 clib_error_t *error = 0;
4127 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4131 /* look up the radv_t information for this interface */
4132 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
4135 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4137 /* if not created yet */
4140 vnet_main_t *vnm = vnet_get_main ();
4141 vnet_sw_interface_t *sw_if0;
4143 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
4144 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
4146 ethernet_interface_t *eth_if0;
4149 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
4152 /* create radv_info. for this interface. This holds all the info needed for router adverts */
4154 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, is_add);
4158 ip6_radv_t *radv_info;
4159 ip6_address_t link_local_address;
4161 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4163 ip6_link_local_address_from_ethernet_mac_address
4164 (&link_local_address, eth_if0->address);
4166 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index);
4167 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_SUB ||
4168 sw_if0->type == VNET_SW_INTERFACE_TYPE_PIPE ||
4169 sw_if0->type == VNET_SW_INTERFACE_TYPE_P2P)
4171 /* make up an interface id */
4172 link_local_address.as_u64[1] =
4173 random_u64 (&radv_info->randomizer);
4175 link_local_address.as_u64[0] =
4176 clib_host_to_net_u64 (0xFE80000000000000ULL);
4178 link_local_address.as_u8[8] &= 0xfd;
4181 ip6_ll_prefix_t ilp = {
4182 .ilp_addr = link_local_address,
4183 .ilp_sw_if_index = sw_if_index,
4186 ip6_ll_table_entry_update (&ilp, FIB_ROUTE_PATH_LOCAL);
4189 /* essentially "enables" ipv6 on this interface */
4190 ip6_mfib_interface_enable_disable (sw_if_index, 1);
4191 ip6_sw_interface_enable_disable (sw_if_index, 1);
4195 radv_info->link_local_address = link_local_address;
4205 ip6_get_ll_address (u32 sw_if_index, ip6_address_t * addr)
4207 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4208 ip6_radv_t *radv_info;
4211 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) <= sw_if_index)
4214 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4219 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4220 *addr = radv_info->link_local_address;
4225 static clib_error_t *
4226 enable_ip6_interface_cmd (vlib_main_t * vm,
4227 unformat_input_t * input, vlib_cli_command_t * cmd)
4229 vnet_main_t *vnm = vnet_get_main ();
4230 clib_error_t *error = 0;
4235 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4237 enable_ip6_interface (vm, sw_if_index);
4241 error = clib_error_return (0, "unknown interface\n'",
4242 format_unformat_error, input);
4249 * This command is used to enable IPv6 on a given interface.
4252 * Example of how enable IPv6 on a given interface:
4253 * @cliexcmd{enable ip6 interface GigabitEthernet2/0/0}
4256 VLIB_CLI_COMMAND (enable_ip6_interface_command, static) =
4258 .path = "enable ip6 interface",
4259 .function = enable_ip6_interface_cmd,
4260 .short_help = "enable ip6 interface <interface>",
4264 static clib_error_t *
4265 disable_ip6_interface_cmd (vlib_main_t * vm,
4266 unformat_input_t * input, vlib_cli_command_t * cmd)
4268 vnet_main_t *vnm = vnet_get_main ();
4269 clib_error_t *error = 0;
4274 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4276 error = disable_ip6_interface (vm, sw_if_index);
4280 error = clib_error_return (0, "unknown interface\n'",
4281 format_unformat_error, input);
4288 * This command is used to disable IPv6 on a given interface.
4291 * Example of how disable IPv6 on a given interface:
4292 * @cliexcmd{disable ip6 interface GigabitEthernet2/0/0}
4295 VLIB_CLI_COMMAND (disable_ip6_interface_command, static) =
4297 .path = "disable ip6 interface",
4298 .function = disable_ip6_interface_cmd,
4299 .short_help = "disable ip6 interface <interface>",
4304 * This command is used to configure the neighbor discovery
4305 * parameters on a given interface. Use the '<em>show ip6 interface</em>'
4306 * command to display some of the current neighbor discovery parameters
4307 * on a given interface. This command has three formats:
4310 * <b>Format 1 - Router Advertisement Options:</b> (Only one can be entered in a single command)
4312 * '<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>'
4316 * <em>[no] ra-managed-config-flag</em> - Advertises in ICMPv6
4317 * router-advertisement messages to use stateful address
4318 * auto-configuration to obtain address information (sets the M-bit).
4319 * Default is the M-bit is not set and the '<em>no</em>' option
4320 * returns it to this default state.
4322 * <em>[no] ra-other-config-flag</em> - Indicates in ICMPv6
4323 * router-advertisement messages that hosts use stateful auto
4324 * configuration to obtain nonaddress related information (sets
4325 * the O-bit). Default is the O-bit is not set and the '<em>no</em>'
4326 * option returns it to this default state.
4328 * <em>[no] ra-suppress</em> - Disables sending ICMPv6 router-advertisement
4329 * messages. The '<em>no</em>' option implies to enable sending ICMPv6
4330 * router-advertisement messages.
4332 * <em>[no] ra-suppress-link-layer</em> - Indicates not to include the
4333 * optional source link-layer address in the ICMPv6 router-advertisement
4334 * messages. Default is to include the optional source link-layer address
4335 * and the '<em>no</em>' option returns it to this default state.
4337 * <em>[no] ra-send-unicast</em> - Use the source address of the
4338 * router-solicitation message if availiable. The default is to use
4339 * multicast address of all nodes, and the '<em>no</em>' option returns
4340 * it to this default state.
4342 * <em>[no] ra-lifetime <lifetime></em> - Advertises the lifetime of a
4343 * default router in ICMPv6 router-advertisement messages. The range is
4344 * from 0 to 9000 seconds. '<em><lifetime></em>' must be greater than
4345 * '<em><max-interval></em>'. The default value is 600 seconds and the
4346 * '<em>no</em>' option returns it to this default value.
4348 * <em>[no] ra-initial <cnt> <interval></em> - Number of initial ICMPv6
4349 * router-advertisement messages sent and the interval between each
4350 * message. Range for count is 1 - 3 and default is 3. Range for interval
4351 * is 1 to 16 seconds, and default is 16 seconds. The '<em>no</em>' option
4352 * returns both to their default value.
4354 * <em>[no] ra-interval <max-interval> [<min-interval>]</em> - Configures the
4355 * interval between sending ICMPv6 router-advertisement messages. The
4356 * range for max-interval is from 4 to 200 seconds. min-interval can not
4357 * be more than 75% of max-interval. If not set, min-interval will be
4358 * set to 75% of max-interval. The range for min-interval is from 3 to
4359 * 150 seconds. The '<em>no</em>' option returns both to their default
4362 * <em>[no] ra-cease</em> - Cease sending ICMPv6 router-advertisement messages.
4363 * The '<em>no</em>' options implies to start (or restart) sending
4364 * ICMPv6 router-advertisement messages.
4367 * <b>Format 2 - Prefix Options:</b>
4369 * '<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>'
4373 * <em>no</em> - All additional flags are ignored and the prefix is deleted.
4375 * <em><valid-lifetime> <pref-lifetime></em> - '<em><valid-lifetime></em>' is the
4376 * length of time in seconds during what the prefix is valid for the purpose of
4377 * on-link determination. Range is 7203 to 2592000 seconds and default is 2592000
4378 * seconds (30 days). '<em><pref-lifetime></em>' is the prefered-lifetime and is the
4379 * length of time in seconds during what addresses generated from the prefix remain
4380 * preferred. Range is 0 to 604800 seconds and default is 604800 seconds (7 days).
4382 * <em>infinite</em> - Both '<em><valid-lifetime></em>' and '<em><<pref-lifetime></em>'
4383 * are inifinte, no timeout.
4385 * <em>no-advertise</em> - Do not send full router address in prefix
4386 * advertisement. Default is to advertise (i.e. - This flag is off by default).
4388 * <em>off-link</em> - Prefix is off-link, clear L-bit in packet. Default is on-link
4389 * (i.e. - This flag is off and L-bit in packet is set by default and this prefix can
4390 * be used for on-link determination). '<em>no-onlink</em>' also controls the L-bit.
4392 * <em>no-autoconfig</em> - Do not use prefix for autoconfiguration, clear A-bit in packet.
4393 * Default is autoconfig (i.e. - This flag is off and A-bit in packet is set by default.
4395 * <em>no-onlink</em> - Do not use prefix for onlink determination, clear L-bit in packet.
4396 * Default is on-link (i.e. - This flag is off and L-bit in packet is set by default and
4397 * this prefix can be used for on-link determination). '<em>off-link</em>' also controls
4401 * <b>Format 3: - Default of Prefix:</b>
4403 * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> default</b></em>'
4405 * When a new prefix is added (or existing one is being overwritten) <em>default</em>
4406 * uses default values for the prefix. If <em>no</em> is used, the <em>default</em>
4407 * is ignored and the prefix is deleted.
4411 * Example of how set a router advertisement option:
4412 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 ra-interval 100 20}
4413 * Example of how to add a prefix:
4414 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 prefix fe80::fe:28ff:fe9c:75b3/64 infinite no-advertise}
4415 * Example of how to delete a prefix:
4416 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 no prefix fe80::fe:28ff:fe9c:75b3/64}
4419 VLIB_CLI_COMMAND (ip6_nd_command, static) =
4422 .short_help = "ip6 nd <interface> ...",
4423 .function = ip6_neighbor_cmd,
4428 ip6_neighbor_set_link_local_address (vlib_main_t * vm, u32 sw_if_index,
4429 ip6_address_t * address)
4431 clib_error_t *error = 0;
4432 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4434 ip6_radv_t *radv_info;
4435 vnet_main_t *vnm = vnet_get_main ();
4436 ip6_ll_prefix_t pfx = { 0, };
4438 if (!ip6_address_is_link_local_unicast (address))
4439 return (error = clib_error_return (0, "address not link-local",
4440 format_unformat_error));
4442 /* call enable ipv6 */
4443 enable_ip6_interface (vm, sw_if_index);
4445 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4449 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4451 pfx.ilp_sw_if_index = sw_if_index;
4453 pfx.ilp_addr = radv_info->link_local_address;
4454 ip6_ll_table_entry_delete (&pfx);
4456 pfx.ilp_addr = *address;
4457 ip6_ll_table_entry_update (&pfx, FIB_ROUTE_PATH_LOCAL);
4459 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4460 radv_info->link_local_address = *address;
4464 vnm->api_errno = VNET_API_ERROR_IP6_NOT_ENABLED;
4465 error = clib_error_return (0, "ip6 not enabled for interface",
4466 format_unformat_error);
4472 * @brief callback when an interface address is added or deleted
4475 ip6_neighbor_add_del_interface_address (ip6_main_t * im,
4478 ip6_address_t * address,
4480 u32 if_address_index, u32 is_delete)
4482 vnet_main_t *vnm = vnet_get_main ();
4483 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4485 vlib_main_t *vm = vnm->vlib_main;
4486 ip6_radv_t *radv_info;
4489 /* create solicited node multicast address for this interface adddress */
4490 ip6_set_solicited_node_multicast_address (&a, 0);
4492 a.as_u8[0xd] = address->as_u8[0xd];
4493 a.as_u8[0xe] = address->as_u8[0xe];
4494 a.as_u8[0xf] = address->as_u8[0xf];
4498 /* try to create radv_info - does nothing if ipv6 already enabled */
4499 enable_ip6_interface (vm, sw_if_index);
4501 /* look up the radv_t information for this interface */
4502 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
4504 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4508 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4511 if (!ip6_address_is_link_local_unicast (address))
4512 radv_info->ref_count++;
4514 ip6_neighbor_add_mld_prefix (radv_info, &a);
4521 /* look up the radv_t information for this interface */
4522 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
4524 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4529 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4531 ip6_neighbor_del_mld_prefix (radv_info, &a);
4533 /* if interface up send MLDP "report" */
4534 radv_info->all_routers_mcast = 0;
4537 if (!ip6_address_is_link_local_unicast (address))
4538 radv_info->ref_count--;
4540 /* Ensure that IPv6 is disabled, and LL removed after ref_count reaches 0 */
4541 disable_ip6_interface (vm, sw_if_index);
4546 ip6_set_neighbor_limit (u32 neighbor_limit)
4548 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4550 nm->limit_neighbor_cache_size = neighbor_limit;
4555 ip6_neighbor_table_bind (ip6_main_t * im,
4558 u32 new_fib_index, u32 old_fib_index)
4560 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4561 ip6_neighbor_t *n = NULL;
4562 u32 i, *to_re_add = 0;
4565 pool_foreach (n, nm->neighbor_pool,
4567 if (n->key.sw_if_index == sw_if_index)
4568 vec_add1 (to_re_add, n - nm->neighbor_pool);
4572 for (i = 0; i < vec_len (to_re_add); i++)
4574 n = pool_elt_at_index (nm->neighbor_pool, to_re_add[i]);
4575 ip6_neighbor_adj_fib_remove (n, old_fib_index);
4576 ip6_neighbor_adj_fib_add (n, new_fib_index);
4578 vec_free (to_re_add);
4581 static clib_error_t *
4582 ip6_neighbor_init (vlib_main_t * vm)
4584 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4585 ip6_main_t *im = &ip6_main;
4587 mhash_init (&nm->neighbor_index_by_key,
4588 /* value size */ sizeof (uword),
4589 /* key size */ sizeof (ip6_neighbor_key_t));
4591 icmp6_register_type (vm, ICMP6_neighbor_solicitation,
4592 ip6_icmp_neighbor_solicitation_node.index);
4593 icmp6_register_type (vm, ICMP6_neighbor_advertisement,
4594 ip6_icmp_neighbor_advertisement_node.index);
4595 icmp6_register_type (vm, ICMP6_router_solicitation,
4596 ip6_icmp_router_solicitation_node.index);
4597 icmp6_register_type (vm, ICMP6_router_advertisement,
4598 ip6_icmp_router_advertisement_node.index);
4600 /* handler node for ip6 neighbor discovery events and timers */
4601 vlib_register_node (vm, &ip6_icmp_neighbor_discovery_event_node);
4603 /* add call backs */
4604 ip6_add_del_interface_address_callback_t cb;
4605 clib_memset (&cb, 0x0, sizeof (ip6_add_del_interface_address_callback_t));
4607 /* when an interface address changes... */
4608 cb.function = ip6_neighbor_add_del_interface_address;
4609 cb.function_opaque = 0;
4610 vec_add1 (im->add_del_interface_address_callbacks, cb);
4612 ip6_table_bind_callback_t cbt;
4613 cbt.function = ip6_neighbor_table_bind;
4614 cbt.function_opaque = 0;
4615 vec_add1 (im->table_bind_callbacks, cbt);
4617 mhash_init (&nm->pending_resolutions_by_address,
4618 /* value size */ sizeof (uword),
4619 /* key size */ sizeof (ip6_address_t));
4621 mhash_init (&nm->mac_changes_by_address,
4622 /* value size */ sizeof (uword),
4623 /* key size */ sizeof (ip6_address_t));
4625 /* default, configurable */
4626 nm->limit_neighbor_cache_size = 50000;
4628 nm->wc_ip6_nd_publisher_node = (uword) ~ 0;
4630 nm->ip6_ra_publisher_node = (uword) ~ 0;
4633 /* $$$$ Hack fix for today */
4634 vec_validate_init_empty
4635 (im->discover_neighbor_next_index_by_hw_if_index, 32, 0 /* drop */ );
4641 VLIB_INIT_FUNCTION (ip6_neighbor_init);
4645 vnet_register_ip6_neighbor_resolution_event (vnet_main_t * vnm,
4648 uword type_opaque, uword data)
4650 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4651 ip6_address_t *address = address_arg;
4653 pending_resolution_t *pr;
4655 pool_get (nm->pending_resolutions, pr);
4657 pr->next_index = ~0;
4658 pr->node_index = node_index;
4659 pr->type_opaque = type_opaque;
4662 p = mhash_get (&nm->pending_resolutions_by_address, address);
4665 /* Insert new resolution at the head of the list */
4666 pr->next_index = p[0];
4667 mhash_unset (&nm->pending_resolutions_by_address, address, 0);
4670 mhash_set (&nm->pending_resolutions_by_address, address,
4671 pr - nm->pending_resolutions, 0 /* old value */ );
4675 vnet_add_del_ip6_nd_change_event (vnet_main_t * vnm,
4676 void *data_callback,
4680 uword type_opaque, uword data, int is_add)
4682 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4683 ip6_address_t *address = address_arg;
4685 /* Try to find an existing entry */
4686 u32 *first = (u32 *) mhash_get (&nm->mac_changes_by_address, address);
4688 pending_resolution_t *mc;
4689 while (p && *p != ~0)
4691 mc = pool_elt_at_index (nm->mac_changes, *p);
4692 if (mc->node_index == node_index && mc->type_opaque == type_opaque
4695 p = &mc->next_index;
4698 int found = p && *p != ~0;
4702 return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
4704 pool_get (nm->mac_changes, mc);
4706 *mc = (pending_resolution_t)
4709 .node_index = node_index,
4710 .type_opaque = type_opaque,
4712 .data_callback = data_callback,
4717 /* Insert new resolution at the end of the list */
4718 u32 new_idx = mc - nm->mac_changes;
4722 mhash_set (&nm->mac_changes_by_address, address, new_idx, 0);
4727 return VNET_API_ERROR_NO_SUCH_ENTRY;
4729 /* Clients may need to clean up pool entries, too */
4730 void (*fp) (u32, u8 *) = data_callback;
4732 (*fp) (mc->data, 0 /* no new mac addrs */ );
4734 /* Remove the entry from the list and delete the entry */
4735 *p = mc->next_index;
4736 pool_put (nm->mac_changes, mc);
4738 /* Remove from hash if we deleted the last entry */
4739 if (*p == ~0 && p == first)
4740 mhash_unset (&nm->mac_changes_by_address, address, 0);
4746 vnet_ip6_nd_term (vlib_main_t * vm,
4747 vlib_node_runtime_t * node,
4749 ethernet_header_t * eth,
4750 ip6_header_t * ip, u32 sw_if_index, u16 bd_index)
4752 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4753 icmp6_neighbor_solicitation_or_advertisement_header_t *ndh;
4755 ndh = ip6_next_header (ip);
4756 if (ndh->icmp.type != ICMP6_neighbor_solicitation &&
4757 ndh->icmp.type != ICMP6_neighbor_advertisement)
4760 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
4761 (p0->flags & VLIB_BUFFER_IS_TRACED)))
4763 u8 *t0 = vlib_add_trace (vm, node, p0,
4764 sizeof (icmp6_input_trace_t));
4765 clib_memcpy (t0, ip, sizeof (icmp6_input_trace_t));
4768 /* Check if anyone want ND events for L2 BDs */
4770 (nm->wc_ip6_nd_publisher_node != (uword) ~ 0
4771 && !ip6_address_is_link_local_unicast (&ip->src_address)))
4773 vnet_nd_wc_publish (sw_if_index, eth->src_address, &ip->src_address);
4776 /* Check if MAC entry exsist for solicited target IP */
4777 if (ndh->icmp.type == ICMP6_neighbor_solicitation)
4779 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *opt;
4780 l2_bridge_domain_t *bd_config;
4783 opt = (void *) (ndh + 1);
4784 if ((opt->header.type !=
4785 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address) ||
4786 (opt->header.n_data_u64s != 1))
4787 return 0; /* source link layer address option not present */
4789 bd_config = vec_elt_at_index (l2input_main.bd_configs, bd_index);
4791 (u8 *) hash_get_mem (bd_config->mac_by_ip6, &ndh->target_address);
4793 { /* found ip-mac entry, generate eighbor advertisement response */
4795 vlib_node_runtime_t *error_node =
4796 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
4797 ip->dst_address = ip->src_address;
4798 ip->src_address = ndh->target_address;
4799 ip->hop_limit = 255;
4801 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
4802 clib_memcpy (opt->ethernet_address, macp, 6);
4803 ndh->icmp.type = ICMP6_neighbor_advertisement;
4804 ndh->advertisement_flags = clib_host_to_net_u32
4805 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED |
4806 ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
4807 ndh->icmp.checksum = 0;
4808 ndh->icmp.checksum =
4809 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip, &bogus_length);
4810 clib_memcpy (eth->dst_address, eth->src_address, 6);
4811 clib_memcpy (eth->src_address, macp, 6);
4812 vlib_error_count (vm, error_node->node_index,
4813 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX, 1);
4823 ip6_neighbor_proxy_add_del (u32 sw_if_index, ip6_address_t * addr, u8 is_del)
4827 fib_prefix_t pfx = {
4829 .fp_proto = FIB_PROTOCOL_IP6,
4834 ip46_address_t nh = {
4838 fib_index = ip6_fib_table_get_index_for_sw_if_index (sw_if_index);
4840 if (~0 == fib_index)
4841 return VNET_API_ERROR_NO_SUCH_FIB;
4845 fib_table_entry_path_remove (fib_index,
4847 FIB_SOURCE_IP6_ND_PROXY,
4851 ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
4852 /* flush the ND cache of this address if it's there */
4853 vnet_unset_ip6_ethernet_neighbor (vlib_get_main (), sw_if_index, addr);
4857 fib_table_entry_path_add (fib_index,
4859 FIB_SOURCE_IP6_ND_PROXY,
4860 FIB_ENTRY_FLAG_NONE,
4864 ~0, 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
4869 static clib_error_t *
4870 set_ip6_nd_proxy_cmd (vlib_main_t * vm,
4871 unformat_input_t * input, vlib_cli_command_t * cmd)
4873 vnet_main_t *vnm = vnet_get_main ();
4874 clib_error_t *error = 0;
4879 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4881 /* get the rest of the command */
4882 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
4884 if (unformat (input, "%U", unformat_ip6_address, &addr))
4886 else if (unformat (input, "delete") || unformat (input, "del"))
4889 return (unformat_parse_error (input));
4893 ip6_neighbor_proxy_add_del (sw_if_index, &addr, is_del);
4899 VLIB_CLI_COMMAND (set_ip6_nd_proxy_command, static) =
4901 .path = "set ip6 nd proxy",
4902 .short_help = "set ip6 nd proxy <HOST> <INTERFACE>",
4903 .function = set_ip6_nd_proxy_cmd,
4908 ethernet_ndp_change_mac (u32 sw_if_index)
4910 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4915 pool_foreach (n, nm->neighbor_pool,
4917 if (n->key.sw_if_index == sw_if_index)
4919 adj_nbr_walk_nh6 (sw_if_index,
4920 &n->key.ip6_address,
4921 ip6_nd_mk_complete_walk, n);
4926 ai = adj_glean_get (FIB_PROTOCOL_IP6, sw_if_index);
4928 if (ADJ_INDEX_INVALID != ai)
4929 adj_glean_update_rewrite (ai);
4933 send_ip6_na (vlib_main_t * vm, u32 sw_if_index)
4935 ip6_main_t *i6m = &ip6_main;
4936 ip6_address_t *ip6_addr = ip6_interface_first_address (i6m, sw_if_index);
4938 send_ip6_na_w_addr (vm, ip6_addr, sw_if_index);
4942 send_ip6_na_w_addr (vlib_main_t * vm,
4943 const ip6_address_t * ip6_addr, u32 sw_if_index)
4945 ip6_main_t *i6m = &ip6_main;
4946 vnet_main_t *vnm = vnet_get_main ();
4947 u8 *rewrite, rewrite_len;
4948 vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
4954 ("Sending unsolicitated NA IP6 address %U on sw_if_idex %d",
4955 format_ip6_address, ip6_addr, sw_if_index);
4957 /* Form unsolicited neighbor advertisement packet from NS pkt template */
4960 icmp6_neighbor_solicitation_header_t *h =
4961 vlib_packet_template_get_packet (vm,
4962 &i6m->discover_neighbor_packet_template,
4967 ip6_set_reserved_multicast_address (&h->ip.dst_address,
4968 IP6_MULTICAST_SCOPE_link_local,
4969 IP6_MULTICAST_GROUP_ID_all_hosts);
4970 h->ip.src_address = ip6_addr[0];
4971 h->neighbor.icmp.type = ICMP6_neighbor_advertisement;
4972 h->neighbor.target_address = ip6_addr[0];
4973 h->neighbor.advertisement_flags = clib_host_to_net_u32
4974 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
4975 h->link_layer_option.header.type =
4976 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
4977 clib_memcpy (h->link_layer_option.ethernet_address,
4978 hi->hw_address, vec_len (hi->hw_address));
4979 h->neighbor.icmp.checksum =
4980 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
4981 ASSERT (bogus_length == 0);
4983 /* Setup MAC header with IP6 Etype and mcast DMAC */
4984 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
4985 ip6_multicast_ethernet_address (dst_address,
4986 IP6_MULTICAST_GROUP_ID_all_hosts);
4988 ethernet_build_rewrite (vnm, sw_if_index, VNET_LINK_IP6, dst_address);
4989 rewrite_len = vec_len (rewrite);
4990 vlib_buffer_advance (b, -rewrite_len);
4991 ethernet_header_t *e = vlib_buffer_get_current (b);
4992 clib_memcpy (e->dst_address, rewrite, rewrite_len);
4995 /* Send unsolicited ND advertisement packet out the specified interface */
4996 vnet_buffer (b)->sw_if_index[VLIB_RX] =
4997 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
4998 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
4999 u32 *to_next = vlib_frame_vector_args (f);
5002 vlib_put_frame_to_node (vm, hi->output_node_index, f);
5007 * fd.io coding-style-patch-verification: ON
5010 * eval: (c-set-style "gnu")