2 * ip/ip6_neighbor.c: IP6 neighbor handling
4 * Copyright (c) 2010 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
18 #include <vnet/ip/ip.h>
19 #include <vnet/ip/ip6_neighbor.h>
20 #include <vnet/ethernet/ethernet.h>
21 #include <vppinfra/mhash.h>
22 #include <vppinfra/md5.h>
23 #include <vnet/adj/adj.h>
24 #include <vnet/adj/adj_mcast.h>
25 #include <vnet/fib/fib_table.h>
26 #include <vnet/fib/ip6_fib.h>
27 #include <vnet/mfib/ip6_mfib.h>
31 * @brief IPv6 Neighbor Adjacency and Neighbor Discovery.
33 * The files contains the API and CLI code for managing IPv6 neighbor
34 * adjacency tables and neighbor discovery logic.
37 /* can't use sizeof link_layer_address, that's 8 */
38 #define ETHER_MAC_ADDR_LEN 6
40 /* advertised prefix option */
43 /* basic advertised information */
47 int adv_autonomous_flag;
48 u32 adv_valid_lifetime_in_secs;
49 u32 adv_pref_lifetime_in_secs;
51 /* advertised values are computed from these times if decrementing */
52 f64 valid_lifetime_expires;
53 f64 pref_lifetime_expires;
55 /* local information */
57 int deprecated_prefix_flag;
58 int decrement_lifetime_flag;
60 #define MIN_ADV_VALID_LIFETIME 7203 /* seconds */
61 #define DEF_ADV_VALID_LIFETIME 2592000
62 #define DEF_ADV_PREF_LIFETIME 604800
64 /* extensions are added here, mobile, DNS etc.. */
70 /* group information */
72 ip6_address_t mcast_address;
74 ip6_address_t *mcast_source_address_pool;
77 /* configured router advertisement information per ipv6 interface */
81 /* advertised config information, zero means unspecified */
85 u16 adv_router_lifetime_in_sec;
86 u32 adv_neighbor_reachable_time_in_msec;
87 u32 adv_time_in_msec_between_retransmitted_neighbor_solicitations;
92 /* source link layer option */
93 u8 link_layer_address[8];
94 u8 link_layer_addr_len;
97 ip6_radv_prefix_t *adv_prefixes_pool;
99 /* Hash table mapping address to index in interface advertised prefix pool. */
100 mhash_t address_to_prefix_index;
102 /* MLDP group information */
103 ip6_mldp_group_t *mldp_group_pool;
105 /* Hash table mapping address to index in mldp address pool. */
106 mhash_t address_to_mldp_index;
108 /* local information */
110 int send_radv; /* radv on/off on this interface - set by config */
111 int cease_radv; /* we are ceasing to send - set byf config */
113 int adv_link_layer_address;
115 int failed_device_check;
116 int all_routers_mcast;
120 adj_index_t mcast_adj_index;
122 /* timing information */
123 #define DEF_MAX_RADV_INTERVAL 200
124 #define DEF_MIN_RADV_INTERVAL .75 * DEF_MAX_RADV_INTERVAL
125 #define DEF_CURR_HOP_LIMIT 64
126 #define DEF_DEF_RTR_LIFETIME 3 * DEF_MAX_RADV_INTERVAL
127 #define MAX_DEF_RTR_LIFETIME 9000
129 #define MAX_INITIAL_RTR_ADVERT_INTERVAL 16 /* seconds */
130 #define MAX_INITIAL_RTR_ADVERTISEMENTS 3 /*transmissions */
131 #define MIN_DELAY_BETWEEN_RAS 3 /* seconds */
132 #define MAX_DELAY_BETWEEN_RAS 1800 /* seconds */
133 #define MAX_RA_DELAY_TIME .5 /* seconds */
135 f64 max_radv_interval;
136 f64 min_radv_interval;
137 f64 min_delay_between_radv;
138 f64 max_delay_between_radv;
139 f64 max_rtr_default_lifetime;
142 f64 last_multicast_time;
143 f64 next_multicast_time;
146 u32 initial_adverts_count;
147 f64 initial_adverts_interval;
148 u32 initial_adverts_sent;
151 u32 n_advertisements_sent;
152 u32 n_solicitations_rcvd;
153 u32 n_solicitations_dropped;
155 /* Link local address to use (defaults to underlying physical for logical interfaces */
156 ip6_address_t link_local_address;
165 /* Used for nd event notification only */
168 } pending_resolution_t;
173 /* Hash tables mapping name to opcode. */
174 uword *opcode_by_name;
176 /* lite beer "glean" adjacency handling */
177 mhash_t pending_resolutions_by_address;
178 pending_resolution_t *pending_resolutions;
180 /* Mac address change notification */
181 mhash_t mac_changes_by_address;
182 pending_resolution_t *mac_changes;
184 u32 *neighbor_input_next_index_by_hw_if_index;
186 ip6_neighbor_t *neighbor_pool;
188 mhash_t neighbor_index_by_key;
190 u32 *if_radv_pool_index_by_sw_if_index;
192 ip6_radv_t *if_radv_pool;
194 /* Neighbor attack mitigation */
195 u32 limit_neighbor_cache_size;
196 u32 neighbor_delete_rotor;
198 } ip6_neighbor_main_t;
200 /* ipv6 neighbor discovery - timer/event types */
204 } ip6_icmp_neighbor_discovery_event_type_t;
214 } ip6_icmp_neighbor_discovery_event_data_t;
216 static ip6_neighbor_main_t ip6_neighbor_main;
217 static ip6_address_t ip6a_zero; /* ip6 address 0 */
220 format_ip6_neighbor_ip6_entry (u8 * s, va_list * va)
222 vlib_main_t *vm = va_arg (*va, vlib_main_t *);
223 ip6_neighbor_t *n = va_arg (*va, ip6_neighbor_t *);
224 vnet_main_t *vnm = vnet_get_main ();
225 vnet_sw_interface_t *si;
229 return format (s, "%=12s%=20s%=6s%=20s%=40s", "Time", "Address", "Flags",
230 "Link layer", "Interface");
232 if (n->flags & IP6_NEIGHBOR_FLAG_DYNAMIC)
233 flags = format (flags, "D");
235 if (n->flags & IP6_NEIGHBOR_FLAG_STATIC)
236 flags = format (flags, "S");
238 if (n->flags & IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY)
239 flags = format (flags, "N");
241 si = vnet_get_sw_interface (vnm, n->key.sw_if_index);
242 s = format (s, "%=12U%=20U%=6s%=20U%=40U",
243 format_vlib_cpu_time, vm, n->cpu_time_last_updated,
244 format_ip6_address, &n->key.ip6_address,
245 flags ? (char *) flags : "",
246 format_ethernet_address, n->link_layer_address,
247 format_vnet_sw_interface_name, vnm, si);
253 static clib_error_t *
254 ip6_neighbor_sw_interface_up_down (vnet_main_t * vnm,
255 u32 sw_if_index, u32 flags)
257 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
260 if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
262 u32 i, *to_delete = 0;
265 pool_foreach (n, nm->neighbor_pool,
267 if (n->key.sw_if_index == sw_if_index)
268 vec_add1 (to_delete, n - nm->neighbor_pool);
272 for (i = 0; i < vec_len (to_delete); i++)
274 n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
275 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
276 if (FIB_NODE_INDEX_INVALID != n->fib_entry_index)
280 .fp_proto = FIB_PROTOCOL_IP6,
281 .fp_addr.ip6 = n->key.ip6_address,
283 fib_table_entry_path_remove
284 (ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index),
289 n->key.sw_if_index, ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
290 pool_put (nm->neighbor_pool, n);
293 vec_free (to_delete);
299 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_neighbor_sw_interface_up_down);
302 unset_random_neighbor_entry (void)
304 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
305 vnet_main_t *vnm = vnet_get_main ();
306 vlib_main_t *vm = vnm->vlib_main;
310 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
311 nm->neighbor_delete_rotor = index;
313 /* Try again from elt 0, could happen if an intfc goes down */
316 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
317 nm->neighbor_delete_rotor = index;
320 /* Nothing left in the pool */
324 e = pool_elt_at_index (nm->neighbor_pool, index);
326 vnet_unset_ip6_ethernet_neighbor (vm, e->key.sw_if_index,
328 e->link_layer_address,
337 u8 link_layer_address[6];
340 } ip6_neighbor_set_unset_rpc_args_t;
342 static void ip6_neighbor_set_unset_rpc_callback
343 (ip6_neighbor_set_unset_rpc_args_t * a);
345 static void set_unset_ip6_neighbor_rpc
348 ip6_address_t * a, u8 * link_layer_address, int is_add, int is_static,
351 ip6_neighbor_set_unset_rpc_args_t args;
352 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
354 args.sw_if_index = sw_if_index;
355 args.is_add = is_add;
356 args.is_static = is_static;
357 args.is_no_fib_entry = is_no_fib_entry;
358 clib_memcpy (&args.addr, a, sizeof (*a));
359 if (NULL != link_layer_address)
360 clib_memcpy (args.link_layer_address, link_layer_address, 6);
362 vl_api_rpc_call_main_thread (ip6_neighbor_set_unset_rpc_callback,
363 (u8 *) & args, sizeof (args));
367 ip6_nbr_probe (ip_adjacency_t * adj)
369 icmp6_neighbor_solicitation_header_t *h;
370 vnet_main_t *vnm = vnet_get_main ();
371 ip6_main_t *im = &ip6_main;
372 ip_interface_address_t *ia;
373 ip6_address_t *dst, *src;
374 vnet_hw_interface_t *hi;
375 vnet_sw_interface_t *si;
381 vm = vlib_get_main ();
383 si = vnet_get_sw_interface (vnm, adj->rewrite_header.sw_if_index);
384 dst = &adj->sub_type.nbr.next_hop.ip6;
386 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
390 src = ip6_interface_address_matching_destination (im, dst,
398 h = vlib_packet_template_get_packet (vm,
399 &im->discover_neighbor_packet_template,
402 hi = vnet_get_sup_hw_interface (vnm, adj->rewrite_header.sw_if_index);
404 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
405 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
406 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
407 h->ip.src_address = src[0];
408 h->neighbor.target_address = dst[0];
410 clib_memcpy (h->link_layer_option.ethernet_address,
411 hi->hw_address, vec_len (hi->hw_address));
413 h->neighbor.icmp.checksum =
414 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
415 ASSERT (bogus_length == 0);
417 b = vlib_get_buffer (vm, bi);
418 vnet_buffer (b)->sw_if_index[VLIB_RX] =
419 vnet_buffer (b)->sw_if_index[VLIB_TX] = adj->rewrite_header.sw_if_index;
421 /* Add encapsulation string for software interface (e.g. ethernet header). */
422 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
423 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
426 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
427 u32 *to_next = vlib_frame_vector_args (f);
430 vlib_put_frame_to_node (vm, hi->output_node_index, f);
435 ip6_nd_mk_complete (adj_index_t ai, ip6_neighbor_t * nbr)
437 adj_nbr_update_rewrite (ai, ADJ_NBR_REWRITE_FLAG_COMPLETE,
438 ethernet_build_rewrite (vnet_get_main (),
439 nbr->key.sw_if_index,
440 adj_get_link_type (ai),
441 nbr->link_layer_address));
445 ip6_nd_mk_incomplete (adj_index_t ai)
447 ip_adjacency_t *adj = adj_get (ai);
449 adj_nbr_update_rewrite (ai,
450 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
451 ethernet_build_rewrite (vnet_get_main (),
454 adj_get_link_type (ai),
455 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
458 #define IP6_NBR_MK_KEY(k, sw_if_index, addr) \
460 k.sw_if_index = sw_if_index; \
461 k.ip6_address = *addr; \
465 static ip6_neighbor_t *
466 ip6_nd_find (u32 sw_if_index, const ip6_address_t * addr)
468 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
469 ip6_neighbor_t *n = NULL;
470 ip6_neighbor_key_t k;
473 IP6_NBR_MK_KEY (k, sw_if_index, addr);
475 p = mhash_get (&nm->neighbor_index_by_key, &k);
478 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
485 ip6_nd_mk_complete_walk (adj_index_t ai, void *ctx)
487 ip6_neighbor_t *nbr = ctx;
489 ip6_nd_mk_complete (ai, nbr);
491 return (ADJ_WALK_RC_CONTINUE);
495 ip6_nd_mk_incomplete_walk (adj_index_t ai, void *ctx)
497 ip6_nd_mk_incomplete (ai);
499 return (ADJ_WALK_RC_CONTINUE);
503 ip6_ethernet_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
510 nbr = ip6_nd_find (sw_if_index, &adj->sub_type.nbr.next_hop.ip6);
512 switch (adj->lookup_next_index)
514 case IP_LOOKUP_NEXT_ARP:
515 case IP_LOOKUP_NEXT_GLEAN:
518 adj_nbr_walk_nh6 (sw_if_index, &nbr->key.ip6_address,
519 ip6_nd_mk_complete_walk, nbr);
524 * no matching ND entry.
525 * construct the rewrite required to for an ND packet, and stick
526 * that in the adj's pipe to smoke.
528 adj_nbr_update_rewrite (ai,
529 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
530 ethernet_build_rewrite (vnm,
533 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
536 * since the FIB has added this adj for a route, it makes sense it may
537 * want to forward traffic sometime soon. Let's send a speculative ND.
538 * just one. If we were to do periodically that wouldn't be bad either,
539 * but that's more code than i'm prepared to write at this time for
540 * relatively little reward.
545 case IP_LOOKUP_NEXT_MCAST:
548 * Construct a partial rewrite from the known ethernet mcast dest MAC
553 rewrite = ethernet_build_rewrite (vnm,
556 ethernet_ip6_mcast_dst_addr ());
559 * Complete the remaining fields of the adj's rewrite to direct the
560 * complete of the rewrite at switch time by copying in the IP
561 * dst address's bytes.
562 * Ofset is 2 bytes into the desintation address. And we write 4 bytes.
564 offset = vec_len (rewrite) - 2;
565 adj_mcast_update_rewrite (ai, rewrite, offset, 0xffffffff);
569 case IP_LOOKUP_NEXT_DROP:
570 case IP_LOOKUP_NEXT_PUNT:
571 case IP_LOOKUP_NEXT_LOCAL:
572 case IP_LOOKUP_NEXT_REWRITE:
573 case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
574 case IP_LOOKUP_NEXT_MIDCHAIN:
575 case IP_LOOKUP_NEXT_ICMP_ERROR:
576 case IP_LOOKUP_N_NEXT:
583 vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
586 u8 * link_layer_address,
587 uword n_bytes_link_layer_address,
588 int is_static, int is_no_fib_entry)
590 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
591 ip6_neighbor_key_t k;
592 ip6_neighbor_t *n = 0;
593 int make_new_nd_cache_entry = 1;
596 pending_resolution_t *pr, *mc;
598 if (vlib_get_thread_index ())
600 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
601 1 /* set new neighbor */ , is_static,
606 k.sw_if_index = sw_if_index;
607 k.ip6_address = a[0];
610 p = mhash_get (&nm->neighbor_index_by_key, &k);
613 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
614 /* Refuse to over-write static neighbor entry. */
615 if (!is_static && (n->flags & IP6_NEIGHBOR_FLAG_STATIC))
617 make_new_nd_cache_entry = 0;
620 if (make_new_nd_cache_entry)
622 pool_get (nm->neighbor_pool, n);
623 mhash_set (&nm->neighbor_index_by_key, &k, n - nm->neighbor_pool,
626 n->fib_entry_index = FIB_NODE_INDEX_INVALID;
628 clib_memcpy (n->link_layer_address,
629 link_layer_address, n_bytes_link_layer_address);
632 * create the adj-fib. the entry in the FIB table for and to the peer.
634 if (!is_no_fib_entry)
638 .fp_proto = FIB_PROTOCOL_IP6,
639 .fp_addr.ip6 = k.ip6_address,
644 ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index);
646 fib_table_entry_path_add (fib_index, &pfx, FIB_SOURCE_ADJ,
647 FIB_ENTRY_FLAG_ATTACHED,
648 FIB_PROTOCOL_IP6, &pfx.fp_addr,
649 n->key.sw_if_index, ~0, 1, NULL,
650 FIB_ROUTE_PATH_FLAG_NONE);
654 n->flags |= IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY;
660 * prevent a DoS attack from the data-plane that
661 * spams us with no-op updates to the MAC address
663 if (0 == memcmp (n->link_layer_address,
664 link_layer_address, n_bytes_link_layer_address))
667 clib_memcpy (n->link_layer_address,
668 link_layer_address, n_bytes_link_layer_address);
671 /* Update time stamp and flags. */
672 n->cpu_time_last_updated = clib_cpu_time_now ();
674 n->flags |= IP6_NEIGHBOR_FLAG_STATIC;
676 n->flags |= IP6_NEIGHBOR_FLAG_DYNAMIC;
678 adj_nbr_walk_nh6 (sw_if_index,
679 &n->key.ip6_address, ip6_nd_mk_complete_walk, n);
681 /* Customer(s) waiting for this address to be resolved? */
682 p = mhash_get (&nm->pending_resolutions_by_address, a);
687 while (next_index != (u32) ~ 0)
689 pr = pool_elt_at_index (nm->pending_resolutions, next_index);
690 vlib_process_signal_event (vm, pr->node_index,
691 pr->type_opaque, pr->data);
692 next_index = pr->next_index;
693 pool_put (nm->pending_resolutions, pr);
696 mhash_unset (&nm->pending_resolutions_by_address, a, 0);
699 /* Customer(s) requesting ND event for this address? */
700 p = mhash_get (&nm->mac_changes_by_address, a);
705 while (next_index != (u32) ~ 0)
707 int (*fp) (u32, u8 *, u32, ip6_address_t *);
709 mc = pool_elt_at_index (nm->mac_changes, next_index);
710 fp = mc->data_callback;
712 /* Call the user's data callback, return 1 to suppress dup events */
715 (*fp) (mc->data, link_layer_address, sw_if_index, &ip6a_zero);
717 * Signal the resolver process, as long as the user
718 * says they want to be notified
721 vlib_process_signal_event (vm, mc->node_index,
722 mc->type_opaque, mc->data);
723 next_index = mc->next_index;
731 vnet_unset_ip6_ethernet_neighbor (vlib_main_t * vm,
734 u8 * link_layer_address,
735 uword n_bytes_link_layer_address)
737 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
738 ip6_neighbor_key_t k;
743 if (vlib_get_thread_index ())
745 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
746 0 /* unset */ , 0, 0);
750 k.sw_if_index = sw_if_index;
751 k.ip6_address = a[0];
754 p = mhash_get (&nm->neighbor_index_by_key, &k);
761 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
762 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
764 adj_nbr_walk_nh6 (sw_if_index,
765 &n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL);
768 if (FIB_NODE_INDEX_INVALID != n->fib_entry_index)
772 .fp_proto = FIB_PROTOCOL_IP6,
773 .fp_addr.ip6 = n->key.ip6_address,
775 fib_table_entry_path_remove
776 (ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index),
780 &pfx.fp_addr, n->key.sw_if_index, ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
782 pool_put (nm->neighbor_pool, n);
788 static void ip6_neighbor_set_unset_rpc_callback
789 (ip6_neighbor_set_unset_rpc_args_t * a)
791 vlib_main_t *vm = vlib_get_main ();
793 vnet_set_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
794 a->link_layer_address, 6, a->is_static,
797 vnet_unset_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
798 a->link_layer_address, 6);
802 ip6_neighbor_sort (void *a1, void *a2)
804 vnet_main_t *vnm = vnet_get_main ();
805 ip6_neighbor_t *n1 = a1, *n2 = a2;
807 cmp = vnet_sw_interface_compare (vnm, n1->key.sw_if_index,
808 n2->key.sw_if_index);
810 cmp = ip6_address_compare (&n1->key.ip6_address, &n2->key.ip6_address);
815 ip6_neighbors_entries (u32 sw_if_index)
817 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
818 ip6_neighbor_t *n, *ns = 0;
821 pool_foreach (n, nm->neighbor_pool,
823 if (sw_if_index != ~0 && n->key.sw_if_index != sw_if_index)
830 vec_sort_with_function (ns, ip6_neighbor_sort);
834 static clib_error_t *
835 show_ip6_neighbors (vlib_main_t * vm,
836 unformat_input_t * input, vlib_cli_command_t * cmd)
838 vnet_main_t *vnm = vnet_get_main ();
839 ip6_neighbor_t *n, *ns;
840 clib_error_t *error = 0;
843 /* Filter entries by interface if given. */
845 (void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index);
847 ns = ip6_neighbors_entries (sw_if_index);
850 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, 0);
853 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, n);
862 * This command is used to display the adjacent IPv6 hosts found via
863 * neighbor discovery. Optionally, limit the output to the specified
867 * Example of how to display the IPv6 neighbor adjacency table:
868 * @cliexstart{show ip6 neighbors}
869 * Time Address Flags Link layer Interface
870 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
871 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
872 * 886.6654 ::1:1:c:0:9 S 02:fe:e4:45:27:5b GigabitEthernet3/0/0
874 * Example of how to display the IPv6 neighbor adjacency table for given interface:
875 * @cliexstart{show ip6 neighbors GigabitEthernet2/0/0}
876 * Time Address Flags Link layer Interface
877 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
878 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
882 VLIB_CLI_COMMAND (show_ip6_neighbors_command, static) = {
883 .path = "show ip6 neighbors",
884 .function = show_ip6_neighbors,
885 .short_help = "show ip6 neighbors [<interface>]",
889 static clib_error_t *
890 set_ip6_neighbor (vlib_main_t * vm,
891 unformat_input_t * input, vlib_cli_command_t * cmd)
893 vnet_main_t *vnm = vnet_get_main ();
899 int is_no_fib_entry = 0;
902 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
904 /* intfc, ip6-address, mac-address */
905 if (unformat (input, "%U %U %U",
906 unformat_vnet_sw_interface, vnm, &sw_if_index,
907 unformat_ip6_address, &addr,
908 unformat_ethernet_address, mac_address))
911 else if (unformat (input, "delete") || unformat (input, "del"))
913 else if (unformat (input, "static"))
915 else if (unformat (input, "no-fib-entry"))
922 return clib_error_return (0, "Missing interface, ip6 or hw address");
925 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
926 mac_address, sizeof (mac_address),
927 is_static, is_no_fib_entry);
929 vnet_unset_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
930 mac_address, sizeof (mac_address));
935 * This command is used to manually add an entry to the IPv6 neighbor
936 * adjacency table. Optionally, the entry can be added as static. It is
937 * also used to remove an entry from the table. Use the '<em>show ip6
938 * neighbors</em>' command to display all learned and manually entered entries.
941 * Example of how to add a static entry to the IPv6 neighbor adjacency table:
942 * @cliexcmd{set ip6 neighbor GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b static}
943 * Example of how to delete an entry from the IPv6 neighbor adjacency table:
944 * @cliexcmd{set ip6 neighbor del GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b}
947 VLIB_CLI_COMMAND (set_ip6_neighbor_command, static) =
949 .path = "set ip6 neighbor",
950 .function = set_ip6_neighbor,
951 .short_help = "set ip6 neighbor [del] <interface> <ip6-address> <mac-address> [static]",
957 ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP,
958 ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY,
959 ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
960 } icmp6_neighbor_solicitation_or_advertisement_next_t;
962 static_always_inline uword
963 icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
964 vlib_node_runtime_t * node,
965 vlib_frame_t * frame,
966 uword is_solicitation)
968 vnet_main_t *vnm = vnet_get_main ();
969 ip6_main_t *im = &ip6_main;
970 uword n_packets = frame->n_vectors;
972 u32 n_left_from, n_left_to_next, next_index, n_advertisements_sent;
973 icmp6_neighbor_discovery_option_type_t option_type;
974 vlib_node_runtime_t *error_node =
975 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
978 from = vlib_frame_vector_args (frame);
979 n_left_from = n_packets;
980 next_index = node->cached_next_index;
982 if (node->flags & VLIB_NODE_FLAG_TRACE)
983 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
985 sizeof (icmp6_input_trace_t));
989 ? ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address
990 : ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address);
991 n_advertisements_sent = 0;
993 while (n_left_from > 0)
995 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
997 while (n_left_from > 0 && n_left_to_next > 0)
1001 icmp6_neighbor_solicitation_or_advertisement_header_t *h0;
1002 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1003 u32 bi0, options_len0, sw_if_index0, next0, error0;
1004 u32 ip6_sadd_link_local, ip6_sadd_unspecified;
1008 bi0 = to_next[0] = from[0];
1013 n_left_to_next -= 1;
1015 p0 = vlib_get_buffer (vm, bi0);
1016 ip0 = vlib_buffer_get_current (p0);
1017 h0 = ip6_next_header (ip0);
1019 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1021 error0 = ICMP6_ERROR_NONE;
1022 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1023 ip6_sadd_link_local =
1024 ip6_address_is_link_local_unicast (&ip0->src_address);
1025 ip6_sadd_unspecified =
1026 ip6_address_is_unspecified (&ip0->src_address);
1028 /* Check that source address is unspecified, link-local or else on-link. */
1029 if (!ip6_sadd_unspecified && !ip6_sadd_link_local)
1031 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1033 if (ADJ_INDEX_INVALID != src_adj_index0)
1035 ip_adjacency_t *adj0 = adj_get (src_adj_index0);
1037 /* Allow all realistic-looking rewrite adjacencies to pass */
1038 ni0 = adj0->lookup_next_index;
1039 is_rewrite0 = (ni0 >= IP_LOOKUP_NEXT_ARP) &&
1040 (ni0 < IP6_LOOKUP_N_NEXT);
1042 error0 = ((adj0->rewrite_header.sw_if_index != sw_if_index0
1045 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK
1051 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK;
1055 o0 = (void *) (h0 + 1);
1056 o0 = ((options_len0 == 8 && o0->header.type == option_type
1057 && o0->header.n_data_u64s == 1) ? o0 : 0);
1059 /* If src address unspecified or link local, donot learn neighbor MAC */
1060 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1061 !ip6_sadd_unspecified))
1063 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1064 if (nm->limit_neighbor_cache_size &&
1065 pool_elts (nm->neighbor_pool) >=
1066 nm->limit_neighbor_cache_size)
1067 unset_random_neighbor_entry ();
1068 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1071 &h0->target_address,
1072 o0->ethernet_address,
1073 sizeof (o0->ethernet_address),
1074 0, ip6_sadd_link_local);
1077 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1079 /* Check that target address is local to this router. */
1080 fib_node_index_t fei;
1084 ip6_fib_table_get_index_for_sw_if_index (sw_if_index0);
1086 if (~0 == fib_index)
1088 error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1092 fei = ip6_fib_table_lookup_exact_match (fib_index,
1093 &h0->target_address,
1096 if (FIB_NODE_INDEX_INVALID == fei)
1098 /* The target address is not in the FIB */
1100 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1104 if (FIB_ENTRY_FLAG_LOCAL &
1105 fib_entry_get_flags_for_source (fei,
1106 FIB_SOURCE_INTERFACE))
1108 /* It's an address that belongs to one of our interfaces
1112 if (fib_entry_is_sourced
1113 (fei, FIB_SOURCE_IP6_ND_PROXY))
1115 /* The address was added by IPv6 Proxy ND config.
1116 * We should only respond to these if the NS arrived on
1117 * the link that has a matching covering prefix */
1122 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1128 if (is_solicitation)
1129 next0 = (error0 != ICMP6_ERROR_NONE
1130 ? ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP
1131 : ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY);
1135 error0 = error0 == ICMP6_ERROR_NONE ?
1136 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_RX : error0;
1139 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1141 vnet_sw_interface_t *sw_if0;
1142 ethernet_interface_t *eth_if0;
1143 ethernet_header_t *eth0;
1145 /* dst address is either source address or the all-nodes mcast addr */
1146 if (!ip6_sadd_unspecified)
1147 ip0->dst_address = ip0->src_address;
1149 ip6_set_reserved_multicast_address (&ip0->dst_address,
1150 IP6_MULTICAST_SCOPE_link_local,
1151 IP6_MULTICAST_GROUP_ID_all_hosts);
1153 ip0->src_address = h0->target_address;
1154 ip0->hop_limit = 255;
1155 h0->icmp.type = ICMP6_neighbor_advertisement;
1157 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1158 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1160 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1163 clib_memcpy (o0->ethernet_address, eth_if0->address, 6);
1165 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
1168 h0->advertisement_flags = clib_host_to_net_u32
1169 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED
1170 | ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
1172 h0->icmp.checksum = 0;
1174 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1176 ASSERT (bogus_length == 0);
1178 /* Reuse current MAC header, copy SMAC to DMAC and
1179 * interface MAC to SMAC */
1180 vlib_buffer_advance (p0, -ethernet_buffer_header_size (p0));
1181 eth0 = vlib_buffer_get_current (p0);
1182 clib_memcpy (eth0->dst_address, eth0->src_address, 6);
1184 clib_memcpy (eth0->src_address, eth_if0->address, 6);
1186 /* Setup input and output sw_if_index for packet */
1187 ASSERT (vnet_buffer (p0)->sw_if_index[VLIB_RX] == sw_if_index0);
1188 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1189 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1190 vnet_main.local_interface_sw_if_index;
1192 n_advertisements_sent++;
1195 p0->error = error_node->errors[error0];
1197 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1198 to_next, n_left_to_next,
1202 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1205 /* Account for advertisements sent. */
1206 vlib_error_count (vm, error_node->node_index,
1207 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX,
1208 n_advertisements_sent);
1210 return frame->n_vectors;
1213 /* for "syslogging" - use elog for now */
1214 #define foreach_log_level \
1215 _ (DEBUG, "DEBUG") \
1216 _ (INFO, "INFORMATION") \
1217 _ (NOTICE, "NOTICE") \
1218 _ (WARNING, "WARNING") \
1220 _ (CRIT, "CRITICAL") \
1221 _ (ALERT, "ALERT") \
1222 _ (EMERG, "EMERGENCY")
1226 #define _(f,s) LOG_##f,
1231 static char *log_level_strings[] = {
1237 static int logmask = 1 << LOG_DEBUG;
1240 ip6_neighbor_syslog (vlib_main_t * vm, int priority, char *fmt, ...)
1242 /* just use elog for now */
1246 if ((priority > LOG_EMERG) || !(logmask & (1 << priority)))
1252 what = va_format (0, fmt, &va);
1254 ELOG_TYPE_DECLARE (e) =
1256 .format = "ip6 nd: (%s): %s",.format_args = "T4T4",};
1261 ed = ELOG_DATA (&vm->elog_main, e);
1262 ed->s[0] = elog_string (&vm->elog_main, log_level_strings[priority]);
1263 ed->s[1] = elog_string (&vm->elog_main, (char *) what);
1269 /* ipv6 neighbor discovery - router advertisements */
1272 ICMP6_ROUTER_SOLICITATION_NEXT_DROP,
1273 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW,
1274 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX,
1275 ICMP6_ROUTER_SOLICITATION_N_NEXT,
1276 } icmp6_router_solicitation_or_advertisement_next_t;
1278 static_always_inline uword
1279 icmp6_router_solicitation (vlib_main_t * vm,
1280 vlib_node_runtime_t * node, vlib_frame_t * frame)
1282 vnet_main_t *vnm = vnet_get_main ();
1283 ip6_main_t *im = &ip6_main;
1284 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1285 uword n_packets = frame->n_vectors;
1286 u32 *from, *to_next;
1287 u32 n_left_from, n_left_to_next, next_index;
1288 u32 n_advertisements_sent = 0;
1291 icmp6_neighbor_discovery_option_type_t option_type;
1293 vlib_node_runtime_t *error_node =
1294 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1296 from = vlib_frame_vector_args (frame);
1297 n_left_from = n_packets;
1298 next_index = node->cached_next_index;
1300 if (node->flags & VLIB_NODE_FLAG_TRACE)
1301 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1303 sizeof (icmp6_input_trace_t));
1305 /* source may append his LL address */
1306 option_type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1308 while (n_left_from > 0)
1310 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1312 while (n_left_from > 0 && n_left_to_next > 0)
1316 ip6_radv_t *radv_info = 0;
1318 icmp6_neighbor_discovery_header_t *h0;
1319 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1321 u32 bi0, options_len0, sw_if_index0, next0, error0;
1322 u32 is_solicitation = 1, is_dropped = 0;
1323 u32 is_unspecified, is_link_local;
1325 bi0 = to_next[0] = from[0];
1330 n_left_to_next -= 1;
1332 p0 = vlib_get_buffer (vm, bi0);
1333 ip0 = vlib_buffer_get_current (p0);
1334 h0 = ip6_next_header (ip0);
1336 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1337 is_unspecified = ip6_address_is_unspecified (&ip0->src_address);
1339 ip6_address_is_link_local_unicast (&ip0->src_address);
1341 error0 = ICMP6_ERROR_NONE;
1342 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1344 /* check if solicitation (not from nd_timer node) */
1345 if (ip6_address_is_unspecified (&ip0->dst_address))
1346 is_solicitation = 0;
1348 /* Check that source address is unspecified, link-local or else on-link. */
1349 if (!is_unspecified && !is_link_local)
1351 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1353 if (ADJ_INDEX_INVALID != src_adj_index0)
1355 ip_adjacency_t *adj0 = adj_get (src_adj_index0);
1357 error0 = (adj0->rewrite_header.sw_if_index != sw_if_index0
1359 ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK
1364 error0 = ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK;
1368 /* check for source LL option and process */
1369 o0 = (void *) (h0 + 1);
1370 o0 = ((options_len0 == 8
1371 && o0->header.type == option_type
1372 && o0->header.n_data_u64s == 1) ? o0 : 0);
1374 /* if src address unspecified IGNORE any options */
1375 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1376 !is_unspecified && !is_link_local))
1378 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1379 if (nm->limit_neighbor_cache_size &&
1380 pool_elts (nm->neighbor_pool) >=
1381 nm->limit_neighbor_cache_size)
1382 unset_random_neighbor_entry ();
1384 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1386 o0->ethernet_address,
1387 sizeof (o0->ethernet_address),
1391 /* default is to drop */
1392 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1394 if (error0 == ICMP6_ERROR_NONE)
1396 vnet_sw_interface_t *sw_if0;
1397 ethernet_interface_t *eth_if0;
1400 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1401 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1403 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1405 /* only support ethernet interface type for now */
1407 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1410 if (error0 == ICMP6_ERROR_NONE)
1414 /* adjust the sizeof the buffer to just include the ipv6 header */
1415 p0->current_length -=
1417 sizeof (icmp6_neighbor_discovery_header_t));
1419 /* look up the radv_t information for this interface */
1420 vec_validate_init_empty
1421 (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
1423 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1426 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1430 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1433 if (error0 == ICMP6_ERROR_NONE)
1435 f64 now = vlib_time_now (vm);
1437 /* for solicited adverts - need to rate limit */
1438 if (is_solicitation)
1440 if (0 != radv_info->last_radv_time &&
1441 (now - radv_info->last_radv_time) <
1442 MIN_DELAY_BETWEEN_RAS)
1445 radv_info->last_radv_time = now;
1449 icmp6_router_advertisement_header_t rh;
1451 rh.icmp.type = ICMP6_router_advertisement;
1453 rh.icmp.checksum = 0;
1455 rh.current_hop_limit = radv_info->curr_hop_limit;
1456 rh.router_lifetime_in_sec =
1457 clib_host_to_net_u16
1458 (radv_info->adv_router_lifetime_in_sec);
1460 time_in_msec_between_retransmitted_neighbor_solicitations
1462 clib_host_to_net_u32 (radv_info->
1463 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
1464 rh.neighbor_reachable_time_in_msec =
1465 clib_host_to_net_u32 (radv_info->
1466 adv_neighbor_reachable_time_in_msec);
1469 (radv_info->adv_managed_flag) ?
1470 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP :
1473 ((radv_info->adv_other_flag) ?
1474 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP :
1478 u16 payload_length =
1479 sizeof (icmp6_router_advertisement_header_t);
1481 vlib_buffer_add_data (vm,
1482 p0->free_list_index,
1486 (icmp6_router_advertisement_header_t));
1488 if (radv_info->adv_link_layer_address)
1490 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
1494 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1495 h.header.n_data_u64s = 1;
1497 /* copy ll address */
1498 clib_memcpy (&h.ethernet_address[0],
1499 eth_if0->address, 6);
1501 vlib_buffer_add_data (vm,
1502 p0->free_list_index,
1506 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t));
1510 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t);
1513 /* add MTU option */
1514 if (radv_info->adv_link_mtu)
1516 icmp6_neighbor_discovery_mtu_option_t h;
1520 clib_host_to_net_u32 (radv_info->adv_link_mtu);
1521 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu;
1522 h.header.n_data_u64s = 1;
1525 sizeof (icmp6_neighbor_discovery_mtu_option_t);
1527 vlib_buffer_add_data (vm,
1528 p0->free_list_index,
1532 (icmp6_neighbor_discovery_mtu_option_t));
1535 /* add advertised prefix options */
1536 ip6_radv_prefix_t *pr_info;
1539 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
1541 if(pr_info->enabled &&
1542 (!pr_info->decrement_lifetime_flag
1543 || (pr_info->pref_lifetime_expires >0)))
1545 /* advertise this prefix */
1546 icmp6_neighbor_discovery_prefix_information_option_t h;
1548 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information;
1549 h.header.n_data_u64s = (sizeof(icmp6_neighbor_discovery_prefix_information_option_t) >> 3);
1551 h.dst_address_length = pr_info->prefix_len;
1553 h.flags = (pr_info->adv_on_link_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_FLAG_ON_LINK : 0;
1554 h.flags |= (pr_info->adv_autonomous_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_AUTO : 0;
1556 if(radv_info->cease_radv && pr_info->deprecated_prefix_flag)
1558 h.valid_time = clib_host_to_net_u32(MIN_ADV_VALID_LIFETIME);
1559 h.preferred_time = 0;
1563 if(pr_info->decrement_lifetime_flag)
1565 pr_info->adv_valid_lifetime_in_secs = ((pr_info->valid_lifetime_expires > now)) ?
1566 (pr_info->valid_lifetime_expires - now) : 0;
1568 pr_info->adv_pref_lifetime_in_secs = ((pr_info->pref_lifetime_expires > now)) ?
1569 (pr_info->pref_lifetime_expires - now) : 0;
1572 h.valid_time = clib_host_to_net_u32(pr_info->adv_valid_lifetime_in_secs);
1573 h.preferred_time = clib_host_to_net_u32(pr_info->adv_pref_lifetime_in_secs) ;
1577 clib_memcpy(&h.dst_address, &pr_info->prefix, sizeof(ip6_address_t));
1579 payload_length += sizeof( icmp6_neighbor_discovery_prefix_information_option_t);
1581 vlib_buffer_add_data (vm,
1582 p0->free_list_index,
1584 (void *)&h, sizeof(icmp6_neighbor_discovery_prefix_information_option_t));
1590 /* add additional options before here */
1592 /* finish building the router advertisement... */
1593 if (!is_unspecified && radv_info->send_unicast)
1595 ip0->dst_address = ip0->src_address;
1599 /* target address is all-nodes mcast addr */
1600 ip6_set_reserved_multicast_address
1602 IP6_MULTICAST_SCOPE_link_local,
1603 IP6_MULTICAST_GROUP_ID_all_hosts);
1606 /* source address MUST be the link-local address */
1607 ip0->src_address = radv_info->link_local_address;
1609 ip0->hop_limit = 255;
1610 ip0->payload_length =
1611 clib_host_to_net_u16 (payload_length);
1613 icmp6_router_advertisement_header_t *rh0 =
1614 (icmp6_router_advertisement_header_t *) (ip0 + 1);
1615 rh0->icmp.checksum =
1616 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1618 ASSERT (bogus_length == 0);
1620 /* setup output if and adjacency */
1621 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1622 vnet_main.local_interface_sw_if_index;
1624 if (is_solicitation)
1626 ethernet_header_t *eth0;
1627 /* Reuse current MAC header, copy SMAC to DMAC and
1628 * interface MAC to SMAC */
1629 vlib_buffer_reset (p0);
1630 eth0 = vlib_buffer_get_current (p0);
1631 clib_memcpy (eth0->dst_address, eth0->src_address,
1633 clib_memcpy (eth0->src_address, eth_if0->address,
1636 is_dropped ? next0 :
1637 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX;
1638 vnet_buffer (p0)->sw_if_index[VLIB_TX] =
1643 adj_index0 = radv_info->mcast_adj_index;
1644 if (adj_index0 == 0)
1645 error0 = ICMP6_ERROR_DST_LOOKUP_MISS;
1649 is_dropped ? next0 :
1650 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW;
1651 vnet_buffer (p0)->ip.adj_index[VLIB_TX] =
1655 p0->flags |= VNET_BUFFER_LOCALLY_ORIGINATED;
1657 radv_info->n_solicitations_dropped += is_dropped;
1658 radv_info->n_solicitations_rcvd += is_solicitation;
1660 if ((error0 == ICMP6_ERROR_NONE) && !is_dropped)
1662 radv_info->n_advertisements_sent++;
1663 n_advertisements_sent++;
1669 p0->error = error_node->errors[error0];
1671 if (error0 != ICMP6_ERROR_NONE)
1672 vlib_error_count (vm, error_node->node_index, error0, 1);
1674 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1675 to_next, n_left_to_next,
1680 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1683 /* Account for router advertisements sent. */
1684 vlib_error_count (vm, error_node->node_index,
1685 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_TX,
1686 n_advertisements_sent);
1688 return frame->n_vectors;
1691 /* validate advertised info for consistancy (see RFC-4861 section 6.2.7) - log any inconsistencies, packet will always be dropped */
1692 static_always_inline uword
1693 icmp6_router_advertisement (vlib_main_t * vm,
1694 vlib_node_runtime_t * node, vlib_frame_t * frame)
1696 vnet_main_t *vnm = vnet_get_main ();
1697 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1698 uword n_packets = frame->n_vectors;
1699 u32 *from, *to_next;
1700 u32 n_left_from, n_left_to_next, next_index;
1701 u32 n_advertisements_rcvd = 0;
1703 vlib_node_runtime_t *error_node =
1704 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1706 from = vlib_frame_vector_args (frame);
1707 n_left_from = n_packets;
1708 next_index = node->cached_next_index;
1710 if (node->flags & VLIB_NODE_FLAG_TRACE)
1711 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1713 sizeof (icmp6_input_trace_t));
1715 while (n_left_from > 0)
1717 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1719 while (n_left_from > 0 && n_left_to_next > 0)
1723 ip6_radv_t *radv_info = 0;
1724 icmp6_router_advertisement_header_t *h0;
1725 u32 bi0, options_len0, sw_if_index0, next0, error0;
1727 bi0 = to_next[0] = from[0];
1732 n_left_to_next -= 1;
1734 p0 = vlib_get_buffer (vm, bi0);
1735 ip0 = vlib_buffer_get_current (p0);
1736 h0 = ip6_next_header (ip0);
1738 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1740 error0 = ICMP6_ERROR_NONE;
1741 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1743 /* Check that source address is link-local */
1744 error0 = (!ip6_address_is_link_local_unicast (&ip0->src_address)) ?
1745 ICMP6_ERROR_ROUTER_ADVERTISEMENT_SOURCE_NOT_LINK_LOCAL : error0;
1747 /* default is to drop */
1748 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1750 n_advertisements_rcvd++;
1752 if (error0 == ICMP6_ERROR_NONE)
1754 vnet_sw_interface_t *sw_if0;
1755 ethernet_interface_t *eth_if0;
1757 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1758 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1760 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1762 /* only support ethernet interface type for now */
1764 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1767 if (error0 == ICMP6_ERROR_NONE)
1771 /* look up the radv_t information for this interface */
1772 vec_validate_init_empty
1773 (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
1775 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1778 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1782 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1785 if (error0 == ICMP6_ERROR_NONE)
1787 /* validate advertised information */
1788 if ((h0->current_hop_limit && radv_info->curr_hop_limit)
1789 && (h0->current_hop_limit !=
1790 radv_info->curr_hop_limit))
1792 ip6_neighbor_syslog (vm, LOG_WARNING,
1793 "our AdvCurHopLimit on %U doesn't agree with %U",
1794 format_vnet_sw_if_index_name,
1801 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP)
1802 != radv_info->adv_managed_flag)
1804 ip6_neighbor_syslog (vm, LOG_WARNING,
1805 "our AdvManagedFlag on %U doesn't agree with %U",
1806 format_vnet_sw_if_index_name,
1813 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP)
1814 != radv_info->adv_other_flag)
1816 ip6_neighbor_syslog (vm, LOG_WARNING,
1817 "our AdvOtherConfigFlag on %U doesn't agree with %U",
1818 format_vnet_sw_if_index_name,
1825 time_in_msec_between_retransmitted_neighbor_solicitations
1827 adv_time_in_msec_between_retransmitted_neighbor_solicitations)
1829 time_in_msec_between_retransmitted_neighbor_solicitations
1831 clib_host_to_net_u32 (radv_info->
1832 adv_time_in_msec_between_retransmitted_neighbor_solicitations)))
1834 ip6_neighbor_syslog (vm, LOG_WARNING,
1835 "our AdvRetransTimer on %U doesn't agree with %U",
1836 format_vnet_sw_if_index_name,
1842 if ((h0->neighbor_reachable_time_in_msec &&
1843 radv_info->adv_neighbor_reachable_time_in_msec) &&
1844 (h0->neighbor_reachable_time_in_msec !=
1845 clib_host_to_net_u32
1846 (radv_info->adv_neighbor_reachable_time_in_msec)))
1848 ip6_neighbor_syslog (vm, LOG_WARNING,
1849 "our AdvReachableTime on %U doesn't agree with %U",
1850 format_vnet_sw_if_index_name,
1856 /* check for MTU or prefix options or .. */
1857 u8 *opt_hdr = (u8 *) (h0 + 1);
1858 while (options_len0 > 0)
1860 icmp6_neighbor_discovery_option_header_t *o0 =
1861 (icmp6_neighbor_discovery_option_header_t *)
1863 int opt_len = o0->n_data_u64s << 3;
1864 icmp6_neighbor_discovery_option_type_t option_type =
1867 if (options_len0 < 2)
1869 ip6_neighbor_syslog (vm, LOG_ERR,
1870 "malformed RA packet on %U from %U",
1871 format_vnet_sw_if_index_name,
1880 ip6_neighbor_syslog (vm, LOG_ERR,
1881 " zero length option in RA on %U from %U",
1882 format_vnet_sw_if_index_name,
1888 else if (opt_len > options_len0)
1890 ip6_neighbor_syslog (vm, LOG_ERR,
1891 "option length in RA packet greater than total length on %U from %U",
1892 format_vnet_sw_if_index_name,
1899 options_len0 -= opt_len;
1902 switch (option_type)
1904 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu:
1906 icmp6_neighbor_discovery_mtu_option_t *h =
1907 (icmp6_neighbor_discovery_mtu_option_t
1910 if (opt_len < sizeof (*h))
1913 if ((h->mtu && radv_info->adv_link_mtu) &&
1915 clib_host_to_net_u32
1916 (radv_info->adv_link_mtu)))
1918 ip6_neighbor_syslog (vm, LOG_WARNING,
1919 "our AdvLinkMTU on %U doesn't agree with %U",
1920 format_vnet_sw_if_index_name,
1928 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information:
1930 icmp6_neighbor_discovery_prefix_information_option_t
1932 (icmp6_neighbor_discovery_prefix_information_option_t
1935 /* validate advertised prefix options */
1936 ip6_radv_prefix_t *pr_info;
1937 u32 preferred, valid;
1939 if (opt_len < sizeof (*h))
1943 clib_net_to_host_u32 (h->preferred_time);
1944 valid = clib_net_to_host_u32 (h->valid_time);
1946 /* look for matching prefix - if we our advertising it, it better be consistant */
1948 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
1952 ip6_address_mask_from_width(&mask, pr_info->prefix_len);
1954 if(pr_info->enabled &&
1955 (pr_info->prefix_len == h->dst_address_length) &&
1956 ip6_address_is_equal_masked (&pr_info->prefix, &h->dst_address, &mask))
1959 if(!pr_info->decrement_lifetime_flag &&
1960 valid != pr_info->adv_valid_lifetime_in_secs)
1962 ip6_neighbor_syslog(vm, LOG_WARNING,
1963 "our ADV validlifetime on %U for %U does not agree with %U",
1964 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
1965 format_ip6_address, &h->dst_address);
1967 if(!pr_info->decrement_lifetime_flag &&
1968 preferred != pr_info->adv_pref_lifetime_in_secs)
1970 ip6_neighbor_syslog(vm, LOG_WARNING,
1971 "our ADV preferredlifetime on %U for %U does not agree with %U",
1972 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
1973 format_ip6_address, &h->dst_address);
1990 p0->error = error_node->errors[error0];
1992 if (error0 != ICMP6_ERROR_NONE)
1993 vlib_error_count (vm, error_node->node_index, error0, 1);
1995 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1996 to_next, n_left_to_next,
2000 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2003 /* Account for router advertisements sent. */
2004 vlib_error_count (vm, error_node->node_index,
2005 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_RX,
2006 n_advertisements_rcvd);
2008 return frame->n_vectors;
2012 * @brief Add a multicast Address to the advertised MLD set
2015 ip6_neighbor_add_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2017 ip6_mldp_group_t *mcast_group_info;
2020 /* lookup mldp info for this interface */
2021 p = mhash_get (&radv_info->address_to_mldp_index, &addr);
2023 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2026 if (!mcast_group_info)
2030 pool_get (radv_info->mldp_group_pool, mcast_group_info);
2032 mi = mcast_group_info - radv_info->mldp_group_pool;
2033 mhash_set (&radv_info->address_to_mldp_index, &addr, mi, /* old_value */
2036 mcast_group_info->type = 4;
2037 mcast_group_info->mcast_source_address_pool = 0;
2038 mcast_group_info->num_sources = 0;
2039 clib_memcpy (&mcast_group_info->mcast_address, &addr,
2040 sizeof (ip6_address_t));
2045 * @brief Delete a multicast Address from the advertised MLD set
2048 ip6_neighbor_del_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2050 ip6_mldp_group_t *mcast_group_info;
2053 p = mhash_get (&radv_info->address_to_mldp_index, &addr);
2055 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2057 if (mcast_group_info)
2059 mhash_unset (&radv_info->address_to_mldp_index, &addr,
2061 pool_put (radv_info->mldp_group_pool, mcast_group_info);
2066 * @brief Add a multicast Address to the advertised MLD set
2069 ip6_neighbor_add_mld_grp (ip6_radv_t * a,
2070 ip6_multicast_address_scope_t scope,
2071 ip6_multicast_link_local_group_id_t group)
2075 ip6_set_reserved_multicast_address (&addr, scope, group);
2077 ip6_neighbor_add_mld_prefix (a, &addr);
2081 * @brief create and initialize router advertisement parameters with default
2082 * values for this intfc
2085 ip6_neighbor_sw_interface_add_del (vnet_main_t * vnm,
2086 u32 sw_if_index, u32 is_add)
2088 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2091 vnet_sw_interface_t *sw_if0;
2092 ethernet_interface_t *eth_if0 = 0;
2094 /* lookup radv container - ethernet interfaces only */
2095 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2096 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2097 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2102 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2104 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2108 a = pool_elt_at_index (nm->if_radv_pool, ri);
2112 ip6_radv_prefix_t *p;
2113 ip6_mldp_group_t *m;
2115 /* release the lock on the interface's mcast adj */
2116 adj_unlock (a->mcast_adj_index);
2118 /* clean up prefix and MDP pools */
2120 pool_flush(p, a->adv_prefixes_pool,
2122 mhash_unset (&a->address_to_prefix_index, &p->prefix, 0);
2124 pool_flush (m, a->mldp_group_pool,
2126 mhash_unset (&a->address_to_mldp_index, &m->mcast_address, 0);
2130 pool_free (a->mldp_group_pool);
2131 pool_free (a->adv_prefixes_pool);
2133 mhash_free (&a->address_to_prefix_index);
2134 mhash_free (&a->address_to_mldp_index);
2136 pool_put (nm->if_radv_pool, a);
2137 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ~0;
2145 vnet_hw_interface_t *hw_if0;
2147 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index);
2149 pool_get (nm->if_radv_pool, a);
2151 ri = a - nm->if_radv_pool;
2152 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ri;
2154 /* initialize default values (most of which are zero) */
2155 memset (a, 0, sizeof (a[0]));
2157 a->sw_if_index = sw_if_index;
2158 a->max_radv_interval = DEF_MAX_RADV_INTERVAL;
2159 a->min_radv_interval = DEF_MIN_RADV_INTERVAL;
2160 a->curr_hop_limit = DEF_CURR_HOP_LIMIT;
2161 a->adv_router_lifetime_in_sec = DEF_DEF_RTR_LIFETIME;
2163 /* send ll address source address option */
2164 a->adv_link_layer_address = 1;
2166 a->min_delay_between_radv = MIN_DELAY_BETWEEN_RAS;
2167 a->max_delay_between_radv = MAX_DELAY_BETWEEN_RAS;
2168 a->max_rtr_default_lifetime = MAX_DEF_RTR_LIFETIME;
2169 a->seed = (u32) clib_cpu_time_now ();
2170 (void) random_u32 (&a->seed);
2171 a->randomizer = clib_cpu_time_now ();
2172 (void) random_u64 (&a->randomizer);
2174 a->initial_adverts_count = MAX_INITIAL_RTR_ADVERTISEMENTS;
2175 a->initial_adverts_sent = a->initial_adverts_count - 1;
2176 a->initial_adverts_interval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
2178 /* deafult is to send */
2181 /* fill in radv_info for this interface that will be needed later */
2182 a->adv_link_mtu = hw_if0->max_l3_packet_bytes[VLIB_RX];
2184 clib_memcpy (a->link_layer_address, eth_if0->address, 6);
2186 /* fill in default link-local address (this may be overridden) */
2187 ip6_link_local_address_from_ethernet_address
2188 (&a->link_local_address, eth_if0->address);
2190 mhash_init (&a->address_to_prefix_index, sizeof (uword),
2191 sizeof (ip6_address_t));
2192 mhash_init (&a->address_to_mldp_index, sizeof (uword),
2193 sizeof (ip6_address_t));
2195 a->mcast_adj_index = adj_mcast_add_or_lock (FIB_PROTOCOL_IP6,
2199 /* add multicast groups we will always be reporting */
2200 ip6_neighbor_add_mld_grp (a,
2201 IP6_MULTICAST_SCOPE_link_local,
2202 IP6_MULTICAST_GROUP_ID_all_hosts);
2203 ip6_neighbor_add_mld_grp (a,
2204 IP6_MULTICAST_SCOPE_link_local,
2205 IP6_MULTICAST_GROUP_ID_all_routers);
2206 ip6_neighbor_add_mld_grp (a,
2207 IP6_MULTICAST_SCOPE_link_local,
2208 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2214 /* send an mldpv2 report */
2216 ip6_neighbor_send_mldpv2_report (u32 sw_if_index)
2218 vnet_main_t *vnm = vnet_get_main ();
2219 vlib_main_t *vm = vnm->vlib_main;
2220 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2221 vnet_sw_interface_t *sw_if0;
2222 ethernet_interface_t *eth_if0;
2226 ip6_radv_t *radv_info;
2236 icmp6_multicast_listener_report_header_t *rh0;
2237 icmp6_multicast_listener_report_packet_t *rp0;
2239 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2240 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
2241 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2243 if (!eth_if0 || !vnet_sw_interface_is_admin_up (vnm, sw_if_index))
2246 /* look up the radv_t information for this interface */
2247 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2250 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2255 /* send report now - build a mldpv2 report packet */
2256 n_allocated = vlib_buffer_alloc_from_free_list (vm,
2259 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2260 if (PREDICT_FALSE (n_allocated == 0))
2262 clib_warning ("buffer allocation failure");
2266 b0 = vlib_get_buffer (vm, bo0);
2268 /* adjust the sizeof the buffer to just include the ipv6 header */
2269 b0->current_length = sizeof (icmp6_multicast_listener_report_packet_t);
2271 payload_length = sizeof (icmp6_multicast_listener_report_header_t);
2273 b0->error = ICMP6_ERROR_NONE;
2275 rp0 = vlib_buffer_get_current (b0);
2276 ip0 = (ip6_header_t *) & rp0->ip;
2277 rh0 = (icmp6_multicast_listener_report_header_t *) & rp0->report_hdr;
2279 memset (rp0, 0x0, sizeof (icmp6_multicast_listener_report_packet_t));
2281 ip0->ip_version_traffic_class_and_flow_label =
2282 clib_host_to_net_u32 (0x6 << 28);
2284 ip0->protocol = IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS;
2285 /* for DEBUG - vnet driver won't seem to emit router alerts */
2286 /* ip0->protocol = IP_PROTOCOL_ICMP6; */
2289 rh0->icmp.type = ICMP6_multicast_listener_report_v2;
2291 /* source address MUST be the link-local address */
2292 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2293 ip0->src_address = radv_info->link_local_address;
2295 /* destination is all mldpv2 routers */
2296 ip6_set_reserved_multicast_address (&ip0->dst_address,
2297 IP6_MULTICAST_SCOPE_link_local,
2298 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2300 /* add reports here */
2301 ip6_mldp_group_t *m;
2302 int num_addr_records = 0;
2303 icmp6_multicast_address_record_t rr;
2305 /* fill in the hop-by-hop extension header (router alert) info */
2306 rh0->ext_hdr.next_hdr = IP_PROTOCOL_ICMP6;
2307 rh0->ext_hdr.n_data_u64s = 0;
2309 rh0->alert.type = IP6_MLDP_ALERT_TYPE;
2311 rh0->alert.value = 0;
2316 rh0->icmp.checksum = 0;
2319 pool_foreach (m, radv_info->mldp_group_pool,
2322 rr.aux_data_len_u32s = 0;
2323 rr.num_sources = clib_host_to_net_u16 (m->num_sources);
2324 clib_memcpy(&rr.mcast_addr, &m->mcast_address, sizeof(ip6_address_t));
2328 vlib_buffer_add_data
2329 (vm, b0->free_list_index, bo0,
2330 (void *)&rr, sizeof(icmp6_multicast_address_record_t));
2332 payload_length += sizeof( icmp6_multicast_address_record_t);
2337 rh0->num_addr_records = clib_host_to_net_u16 (num_addr_records);
2339 /* update lengths */
2340 ip0->payload_length = clib_host_to_net_u16 (payload_length);
2342 rh0->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0,
2344 ASSERT (bogus_length == 0);
2347 * OK to override w/ no regard for actual FIB, because
2348 * ip6-rewrite only looks at the adjacency.
2350 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
2351 vnet_main.local_interface_sw_if_index;
2353 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
2354 b0->flags |= VNET_BUFFER_LOCALLY_ORIGINATED;
2356 vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite-mcast");
2358 f = vlib_get_frame_to_node (vm, node->index);
2359 to_next = vlib_frame_vector_args (f);
2363 vlib_put_frame_to_node (vm, node->index, f);
2368 VLIB_REGISTER_NODE (ip6_icmp_router_solicitation_node,static) =
2370 .function = icmp6_router_solicitation,
2371 .name = "icmp6-router-solicitation",
2373 .vector_size = sizeof (u32),
2375 .format_trace = format_icmp6_input_trace,
2377 .n_next_nodes = ICMP6_ROUTER_SOLICITATION_N_NEXT,
2379 [ICMP6_ROUTER_SOLICITATION_NEXT_DROP] = "error-drop",
2380 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW] = "ip6-rewrite-mcast",
2381 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX] = "interface-output",
2386 /* send a RA or update the timer info etc.. */
2388 ip6_neighbor_process_timer_event (vlib_main_t * vm,
2389 vlib_node_runtime_t * node,
2390 vlib_frame_t * frame)
2392 vnet_main_t *vnm = vnet_get_main ();
2393 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2394 ip6_radv_t *radv_info;
2395 vlib_frame_t *f = 0;
2396 u32 n_this_frame = 0;
2397 u32 n_left_to_next = 0;
2400 icmp6_router_solicitation_header_t *h0;
2402 f64 now = vlib_time_now (vm);
2404 /* Interface ip6 radv info list */
2406 pool_foreach (radv_info, nm->if_radv_pool,
2408 if( !vnet_sw_interface_is_admin_up (vnm, radv_info->sw_if_index))
2410 radv_info->initial_adverts_sent = radv_info->initial_adverts_count-1;
2411 radv_info->next_multicast_time = now;
2412 radv_info->last_multicast_time = now;
2413 radv_info->last_radv_time = 0;
2414 radv_info->all_routers_mcast = 0;
2418 /* Make sure that we've joined the all-routers multicast group */
2419 if(!radv_info->all_routers_mcast)
2421 /* send MDLP_REPORT_EVENT message */
2422 ip6_neighbor_send_mldpv2_report(radv_info->sw_if_index);
2423 radv_info->all_routers_mcast = 1;
2426 /* is it time to send a multicast RA on this interface? */
2427 if(radv_info->send_radv && (now >= radv_info->next_multicast_time))
2432 f64 rfn = (radv_info->max_radv_interval - radv_info->min_radv_interval) *
2433 random_f64 (&radv_info->seed) + radv_info->min_radv_interval;
2435 /* multicast send - compute next multicast send time */
2436 if( radv_info->initial_adverts_sent > 0)
2438 radv_info->initial_adverts_sent--;
2439 if(rfn > radv_info-> initial_adverts_interval)
2440 rfn = radv_info-> initial_adverts_interval;
2442 /* check to see if we are ceasing to send */
2443 if( radv_info->initial_adverts_sent == 0)
2444 if(radv_info->cease_radv)
2445 radv_info->send_radv = 0;
2448 radv_info->next_multicast_time = rfn + now;
2449 radv_info->last_multicast_time = now;
2451 /* send advert now - build a "solicted" router advert with unspecified source address */
2452 n_allocated = vlib_buffer_alloc_from_free_list
2453 (vm, &bo0, n_to_alloc, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2455 if (PREDICT_FALSE(n_allocated == 0))
2457 clib_warning ("buffer allocation failure");
2460 b0 = vlib_get_buffer (vm, bo0);
2461 b0->current_length = sizeof( icmp6_router_solicitation_header_t);
2462 b0->error = ICMP6_ERROR_NONE;
2463 vnet_buffer (b0)->sw_if_index[VLIB_RX] = radv_info->sw_if_index;
2465 h0 = vlib_buffer_get_current (b0);
2467 memset (h0, 0, sizeof (icmp6_router_solicitation_header_t));
2469 h0->ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2470 h0->ip.payload_length = clib_host_to_net_u16 (sizeof (icmp6_router_solicitation_header_t)
2471 - STRUCT_OFFSET_OF (icmp6_router_solicitation_header_t, neighbor));
2472 h0->ip.protocol = IP_PROTOCOL_ICMP6;
2473 h0->ip.hop_limit = 255;
2475 /* set src/dst address as "unspecified" this marks this packet as internally generated rather than recieved */
2476 h0->ip.src_address.as_u64[0] = 0;
2477 h0->ip.src_address.as_u64[1] = 0;
2479 h0->ip.dst_address.as_u64[0] = 0;
2480 h0->ip.dst_address.as_u64[1] = 0;
2482 h0->neighbor.icmp.type = ICMP6_router_solicitation;
2484 if (PREDICT_FALSE(f == 0))
2486 f = vlib_get_frame_to_node (vm, ip6_icmp_router_solicitation_node.index);
2487 to_next = vlib_frame_vector_args (f);
2488 n_left_to_next = VLIB_FRAME_SIZE;
2497 if (PREDICT_FALSE(n_left_to_next == 0))
2499 f->n_vectors = n_this_frame;
2500 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2509 ASSERT (n_this_frame);
2510 f->n_vectors = n_this_frame;
2511 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2517 ip6_icmp_neighbor_discovery_event_process (vlib_main_t * vm,
2518 vlib_node_runtime_t * node,
2519 vlib_frame_t * frame)
2522 ip6_icmp_neighbor_discovery_event_data_t *event_data;
2524 /* init code here */
2528 vlib_process_wait_for_event_or_clock (vm, 1. /* seconds */ );
2530 event_data = vlib_process_get_event_data (vm, &event_type);
2534 /* No events found: timer expired. */
2535 /* process interface list and send RAs as appropriate, update timer info */
2536 ip6_neighbor_process_timer_event (vm, node, frame);
2543 case ICMP6_ND_EVENT_INIT:
2554 _vec_len (event_data) = 0;
2557 return frame->n_vectors;
2561 VLIB_REGISTER_NODE (ip6_icmp_router_advertisement_node,static) =
2563 .function = icmp6_router_advertisement,
2564 .name = "icmp6-router-advertisement",
2566 .vector_size = sizeof (u32),
2568 .format_trace = format_icmp6_input_trace,
2577 vlib_node_registration_t ip6_icmp_neighbor_discovery_event_node = {
2579 .function = ip6_icmp_neighbor_discovery_event_process,
2580 .name = "ip6-icmp-neighbor-discovery-event-process",
2581 .type = VLIB_NODE_TYPE_PROCESS,
2585 icmp6_neighbor_solicitation (vlib_main_t * vm,
2586 vlib_node_runtime_t * node, vlib_frame_t * frame)
2588 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
2589 /* is_solicitation */
2594 icmp6_neighbor_advertisement (vlib_main_t * vm,
2595 vlib_node_runtime_t * node,
2596 vlib_frame_t * frame)
2598 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
2599 /* is_solicitation */
2604 VLIB_REGISTER_NODE (ip6_icmp_neighbor_solicitation_node,static) =
2606 .function = icmp6_neighbor_solicitation,
2607 .name = "icmp6-neighbor-solicitation",
2609 .vector_size = sizeof (u32),
2611 .format_trace = format_icmp6_input_trace,
2613 .n_next_nodes = ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
2615 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP] = "error-drop",
2616 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY] = "interface-output",
2622 VLIB_REGISTER_NODE (ip6_icmp_neighbor_advertisement_node,static) =
2624 .function = icmp6_neighbor_advertisement,
2625 .name = "icmp6-neighbor-advertisement",
2627 .vector_size = sizeof (u32),
2629 .format_trace = format_icmp6_input_trace,
2638 /* API support functions */
2640 ip6_neighbor_ra_config (vlib_main_t * vm, u32 sw_if_index,
2641 u8 suppress, u8 managed, u8 other,
2642 u8 ll_option, u8 send_unicast, u8 cease,
2643 u8 use_lifetime, u32 lifetime,
2644 u32 initial_count, u32 initial_interval,
2645 u32 max_interval, u32 min_interval, u8 is_no)
2647 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2651 /* look up the radv_t information for this interface */
2652 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2654 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2655 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
2660 ip6_radv_t *radv_info;
2661 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2663 if ((max_interval != 0) && (min_interval == 0))
2664 min_interval = .75 * max_interval;
2668 0) ? ((is_no) ? DEF_MAX_RADV_INTERVAL : max_interval) :
2669 radv_info->max_radv_interval;
2672 0) ? ((is_no) ? DEF_MIN_RADV_INTERVAL : min_interval) :
2673 radv_info->min_radv_interval;
2676 0) ? ((is_no) ? DEF_DEF_RTR_LIFETIME : lifetime) :
2677 radv_info->adv_router_lifetime_in_sec;
2681 if (lifetime > MAX_DEF_RTR_LIFETIME)
2682 lifetime = MAX_DEF_RTR_LIFETIME;
2684 if (lifetime <= max_interval)
2685 return VNET_API_ERROR_INVALID_VALUE;
2688 if (min_interval != 0)
2690 if ((min_interval > .75 * max_interval) || (min_interval < 3))
2691 return VNET_API_ERROR_INVALID_VALUE;
2694 if ((initial_count > MAX_INITIAL_RTR_ADVERTISEMENTS) ||
2695 (initial_interval > MAX_INITIAL_RTR_ADVERT_INTERVAL))
2696 return VNET_API_ERROR_INVALID_VALUE;
2699 if "flag" is set and is_no is true then restore default value else set value corresponding to "flag"
2700 if "flag" is clear don't change corresponding value
2702 radv_info->send_radv =
2703 (suppress != 0) ? ((is_no != 0) ? 1 : 0) : radv_info->send_radv;
2704 radv_info->adv_managed_flag =
2705 (managed != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_managed_flag;
2706 radv_info->adv_other_flag =
2707 (other != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_other_flag;
2708 radv_info->adv_link_layer_address =
2710 0) ? ((is_no) ? 1 : 0) : radv_info->adv_link_layer_address;
2711 radv_info->send_unicast =
2712 (send_unicast != 0) ? ((is_no) ? 0 : 1) : radv_info->send_unicast;
2713 radv_info->cease_radv =
2714 (cease != 0) ? ((is_no) ? 0 : 1) : radv_info->cease_radv;
2716 radv_info->min_radv_interval = min_interval;
2717 radv_info->max_radv_interval = max_interval;
2718 radv_info->adv_router_lifetime_in_sec = lifetime;
2720 radv_info->initial_adverts_count =
2722 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERTISEMENTS : initial_count) :
2723 radv_info->initial_adverts_count;
2724 radv_info->initial_adverts_interval =
2725 (initial_interval !=
2726 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERT_INTERVAL : initial_interval) :
2727 radv_info->initial_adverts_interval;
2730 if ((cease != 0) && (is_no))
2731 radv_info->send_radv = 1;
2733 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
2734 radv_info->next_multicast_time = vlib_time_now (vm);
2735 radv_info->last_multicast_time = vlib_time_now (vm);
2736 radv_info->last_radv_time = 0;
2742 ip6_neighbor_ra_prefix (vlib_main_t * vm, u32 sw_if_index,
2743 ip6_address_t * prefix_addr, u8 prefix_len,
2744 u8 use_default, u32 val_lifetime, u32 pref_lifetime,
2745 u8 no_advertise, u8 off_link, u8 no_autoconfig,
2746 u8 no_onlink, u8 is_no)
2748 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2753 /* look up the radv_t information for this interface */
2754 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2757 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2759 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
2763 f64 now = vlib_time_now (vm);
2764 ip6_radv_t *radv_info;
2765 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2767 /* prefix info add, delete or update */
2768 ip6_radv_prefix_t *prefix;
2770 /* lookup prefix info for this address on this interface */
2771 uword *p = mhash_get (&radv_info->address_to_prefix_index, prefix_addr);
2773 prefix = p ? pool_elt_at_index (radv_info->adv_prefixes_pool, p[0]) : 0;
2779 return VNET_API_ERROR_INVALID_VALUE; /* invalid prefix */
2781 if (prefix->prefix_len != prefix_len)
2782 return VNET_API_ERROR_INVALID_VALUE_2;
2784 /* FIXME - Should the DP do this or the CP ? */
2785 /* do specific delete processing here before returning */
2786 /* try to remove from routing table */
2788 mhash_unset (&radv_info->address_to_prefix_index, prefix_addr,
2790 pool_put (radv_info->adv_prefixes_pool, prefix);
2792 radv_info->initial_adverts_sent =
2793 radv_info->initial_adverts_count - 1;
2794 radv_info->next_multicast_time = vlib_time_now (vm);
2795 radv_info->last_multicast_time = vlib_time_now (vm);
2796 radv_info->last_radv_time = 0;
2800 /* adding or changing */
2805 pool_get (radv_info->adv_prefixes_pool, prefix);
2806 pi = prefix - radv_info->adv_prefixes_pool;
2807 mhash_set (&radv_info->address_to_prefix_index, prefix_addr, pi,
2810 memset (prefix, 0x0, sizeof (ip6_radv_prefix_t));
2812 prefix->prefix_len = prefix_len;
2813 clib_memcpy (&prefix->prefix, prefix_addr, sizeof (ip6_address_t));
2815 /* initialize default values */
2816 prefix->adv_on_link_flag = 1; /* L bit set */
2817 prefix->adv_autonomous_flag = 1; /* A bit set */
2818 prefix->adv_valid_lifetime_in_secs = DEF_ADV_VALID_LIFETIME;
2819 prefix->adv_pref_lifetime_in_secs = DEF_ADV_PREF_LIFETIME;
2820 prefix->enabled = 1;
2821 prefix->decrement_lifetime_flag = 1;
2822 prefix->deprecated_prefix_flag = 1;
2826 /* FIXME - Should the DP do this or the CP ? */
2827 /* insert prefix into routing table as a connected prefix */
2836 if (prefix->prefix_len != prefix_len)
2837 return VNET_API_ERROR_INVALID_VALUE_2;
2841 /* FIXME - Should the DP do this or the CP ? */
2842 /* remove from routing table if already there */
2846 if ((val_lifetime == ~0) || (pref_lifetime == ~0))
2848 prefix->adv_valid_lifetime_in_secs = ~0;
2849 prefix->adv_pref_lifetime_in_secs = ~0;
2850 prefix->decrement_lifetime_flag = 0;
2854 prefix->adv_valid_lifetime_in_secs = val_lifetime;;
2855 prefix->adv_pref_lifetime_in_secs = pref_lifetime;
2858 /* copy remaining */
2859 prefix->enabled = !(no_advertise != 0);
2860 prefix->adv_on_link_flag = !((off_link != 0) || (no_onlink != 0));
2861 prefix->adv_autonomous_flag = !(no_autoconfig != 0);
2865 /* fill in the expiration times */
2866 prefix->valid_lifetime_expires =
2867 now + prefix->adv_valid_lifetime_in_secs;
2868 prefix->pref_lifetime_expires = now + prefix->adv_pref_lifetime_in_secs;
2870 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
2871 radv_info->next_multicast_time = vlib_time_now (vm);
2872 radv_info->last_multicast_time = vlib_time_now (vm);
2873 radv_info->last_radv_time = 0;
2879 ip6_neighbor_cmd (vlib_main_t * vm, unformat_input_t * main_input,
2880 vlib_cli_command_t * cmd)
2882 vnet_main_t *vnm = vnet_get_main ();
2883 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2884 clib_error_t *error = 0;
2886 u8 suppress = 0, managed = 0, other = 0;
2887 u8 suppress_ll_option = 0, send_unicast = 0, cease = 0;
2888 u8 use_lifetime = 0;
2889 u32 sw_if_index, ra_lifetime = 0, ra_initial_count =
2890 0, ra_initial_interval = 0;
2891 u32 ra_max_interval = 0, ra_min_interval = 0;
2893 unformat_input_t _line_input, *line_input = &_line_input;
2894 vnet_sw_interface_t *sw_if0;
2896 int add_radv_info = 1;
2897 __attribute__ ((unused)) ip6_radv_t *radv_info = 0;
2898 ip6_address_t ip6_addr;
2902 /* Get a line of input. */
2903 if (!unformat_user (main_input, unformat_line_input, line_input))
2906 /* get basic radv info for this interface */
2907 if (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2910 if (unformat_user (line_input,
2911 unformat_vnet_sw_interface, vnm, &sw_if_index))
2914 ethernet_interface_t *eth_if0 = 0;
2916 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2917 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2919 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2924 clib_error_return (0, "Interface must be of ethernet type");
2928 /* look up the radv_t information for this interface */
2929 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
2932 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2936 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2940 error = clib_error_return (0, "unknown interface %U'",
2941 format_unformat_error, line_input);
2947 error = clib_error_return (0, "invalid interface name %U'",
2948 format_unformat_error, line_input);
2953 /* get the rest of the command */
2954 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2956 if (unformat (line_input, "no"))
2958 else if (unformat (line_input, "prefix %U/%d",
2959 unformat_ip6_address, &ip6_addr, &addr_len))
2964 else if (unformat (line_input, "ra-managed-config-flag"))
2969 else if (unformat (line_input, "ra-other-config-flag"))
2974 else if (unformat (line_input, "ra-suppress") ||
2975 unformat (line_input, "ra-surpress"))
2980 else if (unformat (line_input, "ra-suppress-link-layer") ||
2981 unformat (line_input, "ra-surpress-link-layer"))
2983 suppress_ll_option = 1;
2986 else if (unformat (line_input, "ra-send-unicast"))
2991 else if (unformat (line_input, "ra-lifetime"))
2993 if (!unformat (line_input, "%d", &ra_lifetime))
2995 error = unformat_parse_error (line_input);
3001 else if (unformat (line_input, "ra-initial"))
3004 (line_input, "%d %d", &ra_initial_count, &ra_initial_interval))
3006 error = unformat_parse_error (line_input);
3011 else if (unformat (line_input, "ra-interval"))
3013 if (!unformat (line_input, "%d", &ra_max_interval))
3015 error = unformat_parse_error (line_input);
3019 if (!unformat (line_input, "%d", &ra_min_interval))
3020 ra_min_interval = 0;
3023 else if (unformat (line_input, "ra-cease"))
3030 error = unformat_parse_error (line_input);
3037 ip6_neighbor_ra_config (vm, sw_if_index,
3038 suppress, managed, other,
3039 suppress_ll_option, send_unicast, cease,
3040 use_lifetime, ra_lifetime,
3041 ra_initial_count, ra_initial_interval,
3042 ra_max_interval, ra_min_interval, is_no);
3046 u32 valid_lifetime_in_secs = 0;
3047 u32 pref_lifetime_in_secs = 0;
3048 u8 use_prefix_default_values = 0;
3049 u8 no_advertise = 0;
3051 u8 no_autoconfig = 0;
3054 /* get the rest of the command */
3055 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3057 if (unformat (line_input, "default"))
3059 use_prefix_default_values = 1;
3062 else if (unformat (line_input, "infinite"))
3064 valid_lifetime_in_secs = ~0;
3065 pref_lifetime_in_secs = ~0;
3068 else if (unformat (line_input, "%d %d", &valid_lifetime_in_secs,
3069 &pref_lifetime_in_secs))
3076 /* get the rest of the command */
3077 while (!use_prefix_default_values &&
3078 unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3080 if (unformat (line_input, "no-advertise"))
3082 else if (unformat (line_input, "off-link"))
3084 else if (unformat (line_input, "no-autoconfig"))
3086 else if (unformat (line_input, "no-onlink"))
3090 error = unformat_parse_error (line_input);
3095 ip6_neighbor_ra_prefix (vm, sw_if_index,
3096 &ip6_addr, addr_len,
3097 use_prefix_default_values,
3098 valid_lifetime_in_secs,
3099 pref_lifetime_in_secs,
3101 off_link, no_autoconfig, no_onlink, is_no);
3105 unformat_free (line_input);
3111 ip6_print_addrs (vlib_main_t * vm, u32 * addrs)
3113 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3116 for (i = 0; i < vec_len (addrs); i++)
3118 ip_interface_address_t *a =
3119 pool_elt_at_index (lm->if_address_pool, addrs[i]);
3120 ip6_address_t *address = ip_interface_address_get_address (lm, a);
3122 vlib_cli_output (vm, "\t\t%U/%d",
3123 format_ip6_address, address, a->address_length);
3127 static clib_error_t *
3128 show_ip6_interface_cmd (vlib_main_t * vm,
3129 unformat_input_t * input, vlib_cli_command_t * cmd)
3131 vnet_main_t *vnm = vnet_get_main ();
3132 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3133 clib_error_t *error = 0;
3138 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3142 /* look up the radv_t information for this interface */
3143 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3146 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3150 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3151 ip6_radv_t *radv_info;
3152 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3154 vlib_cli_output (vm, "%U is admin %s\n",
3155 format_vnet_sw_interface_name, vnm,
3156 vnet_get_sw_interface (vnm, sw_if_index),
3157 (vnet_sw_interface_is_admin_up (vnm, sw_if_index) ?
3161 u32 *link_scope = 0, *global_scope = 0;
3162 u32 *local_scope = 0, *unknown_scope = 0;
3163 ip_interface_address_t *a;
3165 vec_validate_init_empty (lm->if_address_pool_index_by_sw_if_index,
3167 ai = lm->if_address_pool_index_by_sw_if_index[sw_if_index];
3169 while (ai != (u32) ~ 0)
3171 a = pool_elt_at_index (lm->if_address_pool, ai);
3172 ip6_address_t *address =
3173 ip_interface_address_get_address (lm, a);
3175 if (ip6_address_is_link_local_unicast (address))
3176 vec_add1 (link_scope, ai);
3177 else if (ip6_address_is_global_unicast (address))
3178 vec_add1 (global_scope, ai);
3179 else if (ip6_address_is_local_unicast (address))
3180 vec_add1 (local_scope, ai);
3182 vec_add1 (unknown_scope, ai);
3184 ai = a->next_this_sw_interface;
3187 if (vec_len (link_scope))
3189 vlib_cli_output (vm, "\tLink-local address(es):\n");
3190 ip6_print_addrs (vm, link_scope);
3191 vec_free (link_scope);
3194 if (vec_len (local_scope))
3196 vlib_cli_output (vm, "\tLocal unicast address(es):\n");
3197 ip6_print_addrs (vm, local_scope);
3198 vec_free (local_scope);
3201 if (vec_len (global_scope))
3203 vlib_cli_output (vm, "\tGlobal unicast address(es):\n");
3204 ip6_print_addrs (vm, global_scope);
3205 vec_free (global_scope);
3208 if (vec_len (unknown_scope))
3210 vlib_cli_output (vm, "\tOther-scope address(es):\n");
3211 ip6_print_addrs (vm, unknown_scope);
3212 vec_free (unknown_scope);
3215 vlib_cli_output (vm, "\tJoined group address(es):\n");
3216 ip6_mldp_group_t *m;
3218 pool_foreach (m, radv_info->mldp_group_pool,
3220 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
3225 vlib_cli_output (vm, "\tAdvertised Prefixes:\n");
3226 ip6_radv_prefix_t *p;
3228 pool_foreach (p, radv_info->adv_prefixes_pool,
3230 vlib_cli_output (vm, "\t\tprefix %U, length %d\n",
3231 format_ip6_address, &p->prefix, p->prefix_len);
3235 vlib_cli_output (vm, "\tMTU is %d\n", radv_info->adv_link_mtu);
3236 vlib_cli_output (vm, "\tICMP error messages are unlimited\n");
3237 vlib_cli_output (vm, "\tICMP redirects are disabled\n");
3238 vlib_cli_output (vm, "\tICMP unreachables are not sent\n");
3239 vlib_cli_output (vm, "\tND DAD is disabled\n");
3240 //vlib_cli_output (vm, "\tND reachable time is %d milliseconds\n",);
3241 vlib_cli_output (vm, "\tND advertised reachable time is %d\n",
3242 radv_info->adv_neighbor_reachable_time_in_msec);
3243 vlib_cli_output (vm,
3244 "\tND advertised retransmit interval is %d (msec)\n",
3246 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
3248 u32 ra_interval = radv_info->max_radv_interval;
3249 u32 ra_interval_min = radv_info->min_radv_interval;
3250 vlib_cli_output (vm,
3251 "\tND router advertisements are sent every %d seconds (min interval is %d)\n",
3252 ra_interval, ra_interval_min);
3253 vlib_cli_output (vm,
3254 "\tND router advertisements live for %d seconds\n",
3255 radv_info->adv_router_lifetime_in_sec);
3256 vlib_cli_output (vm,
3257 "\tHosts %s stateless autoconfig for addresses\n",
3258 (radv_info->adv_managed_flag) ? "use" :
3260 vlib_cli_output (vm, "\tND router advertisements sent %d\n",
3261 radv_info->n_advertisements_sent);
3262 vlib_cli_output (vm, "\tND router solicitations received %d\n",
3263 radv_info->n_solicitations_rcvd);
3264 vlib_cli_output (vm, "\tND router solicitations dropped %d\n",
3265 radv_info->n_solicitations_dropped);
3269 error = clib_error_return (0, "IPv6 not enabled on interface",
3270 format_unformat_error, input);
3278 * This command is used to display various IPv6 attributes on a given
3282 * Example of how to display IPv6 settings:
3283 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
3284 * GigabitEthernet2/0/0 is admin up
3285 * Link-local address(es):
3287 * Joined group address(es):
3292 * Advertised Prefixes:
3293 * prefix fe80::fe:28ff:fe9c:75b3, length 64
3295 * ICMP error messages are unlimited
3296 * ICMP redirects are disabled
3297 * ICMP unreachables are not sent
3298 * ND DAD is disabled
3299 * ND advertised reachable time is 0
3300 * ND advertised retransmit interval is 0 (msec)
3301 * ND router advertisements are sent every 200 seconds (min interval is 150)
3302 * ND router advertisements live for 600 seconds
3303 * Hosts use stateless autoconfig for addresses
3304 * ND router advertisements sent 19336
3305 * ND router solicitations received 0
3306 * ND router solicitations dropped 0
3308 * Example of output if IPv6 is not enabled on the interface:
3309 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
3310 * show ip6 interface: IPv6 not enabled on interface
3314 VLIB_CLI_COMMAND (show_ip6_interface_command, static) =
3316 .path = "show ip6 interface",
3317 .function = show_ip6_interface_cmd,
3318 .short_help = "show ip6 interface <interface>",
3323 disable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
3325 clib_error_t *error = 0;
3326 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3329 /* look up the radv_t information for this interface */
3330 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3332 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3334 /* if not created - do nothing */
3337 vnet_main_t *vnm = vnet_get_main ();
3338 ip6_radv_t *radv_info;
3340 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3342 /* check radv_info ref count for other ip6 addresses on this interface */
3343 /* This implicitly excludes the link local address */
3344 if (radv_info->ref_count == 0)
3346 /* essentially "disables" ipv6 on this interface */
3347 error = ip6_add_del_interface_address (vm, sw_if_index,
3349 link_local_address, 128,
3352 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index,
3354 ip6_mfib_interface_enable_disable (sw_if_index, 0);
3361 ip6_interface_enabled (vlib_main_t * vm, u32 sw_if_index)
3363 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3366 /* look up the radv_t information for this interface */
3367 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3370 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3376 enable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
3378 clib_error_t *error = 0;
3379 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3383 /* look up the radv_t information for this interface */
3384 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3387 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3389 /* if not created yet */
3392 vnet_main_t *vnm = vnet_get_main ();
3393 vnet_sw_interface_t *sw_if0;
3395 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
3396 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
3398 ethernet_interface_t *eth_if0;
3401 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
3404 /* create radv_info. for this interface. This holds all the info needed for router adverts */
3406 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, is_add);
3410 ip6_radv_t *radv_info;
3411 ip6_address_t link_local_address;
3413 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3415 ip6_link_local_address_from_ethernet_mac_address
3416 (&link_local_address, eth_if0->address);
3418 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index);
3419 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_SUB)
3421 /* make up an interface id */
3425 link_local_address.as_u64[0] = radv_info->randomizer;
3428 md5_add (&m, &link_local_address, 16);
3429 md5_finish (&m, digest);
3431 clib_memcpy (&link_local_address, digest, 16);
3433 radv_info->randomizer = link_local_address.as_u64[0];
3435 link_local_address.as_u64[0] =
3436 clib_host_to_net_u64 (0xFE80000000000000ULL);
3438 link_local_address.as_u8[8] &= 0xfd;
3441 ip6_mfib_interface_enable_disable (sw_if_index, 1);
3443 /* essentially "enables" ipv6 on this interface */
3444 error = ip6_add_del_interface_address (vm, sw_if_index,
3445 &link_local_address,
3447 /* address width */ ,
3451 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index,
3455 radv_info->link_local_address = link_local_address;
3464 static clib_error_t *
3465 enable_ip6_interface_cmd (vlib_main_t * vm,
3466 unformat_input_t * input, vlib_cli_command_t * cmd)
3468 vnet_main_t *vnm = vnet_get_main ();
3469 clib_error_t *error = 0;
3474 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3476 enable_ip6_interface (vm, sw_if_index);
3480 error = clib_error_return (0, "unknown interface\n'",
3481 format_unformat_error, input);
3488 * This command is used to enable IPv6 on a given interface.
3491 * Example of how enable IPv6 on a given interface:
3492 * @cliexcmd{enable ip6 interface GigabitEthernet2/0/0}
3495 VLIB_CLI_COMMAND (enable_ip6_interface_command, static) =
3497 .path = "enable ip6 interface",
3498 .function = enable_ip6_interface_cmd,
3499 .short_help = "enable ip6 interface <interface>",
3503 static clib_error_t *
3504 disable_ip6_interface_cmd (vlib_main_t * vm,
3505 unformat_input_t * input, vlib_cli_command_t * cmd)
3507 vnet_main_t *vnm = vnet_get_main ();
3508 clib_error_t *error = 0;
3513 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3515 error = disable_ip6_interface (vm, sw_if_index);
3519 error = clib_error_return (0, "unknown interface\n'",
3520 format_unformat_error, input);
3527 * This command is used to disable IPv6 on a given interface.
3530 * Example of how disable IPv6 on a given interface:
3531 * @cliexcmd{disable ip6 interface GigabitEthernet2/0/0}
3534 VLIB_CLI_COMMAND (disable_ip6_interface_command, static) =
3536 .path = "disable ip6 interface",
3537 .function = disable_ip6_interface_cmd,
3538 .short_help = "disable ip6 interface <interface>",
3543 * This command is used to configure the neighbor discovery
3544 * parameters on a given interface. Use the '<em>show ip6 interface</em>'
3545 * command to display some of the current neighbor discovery parameters
3546 * on a given interface. This command has three formats:
3549 * <b>Format 1 - Router Advertisement Options:</b> (Only one can be entered in a single command)
3551 * '<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>'
3555 * <em>[no] ra-managed-config-flag</em> - Advertises in ICMPv6
3556 * router-advertisement messages to use stateful address
3557 * auto-configuration to obtain address information (sets the M-bit).
3558 * Default is the M-bit is not set and the '<em>no</em>' option
3559 * returns it to this default state.
3561 * <em>[no] ra-other-config-flag</em> - Indicates in ICMPv6
3562 * router-advertisement messages that hosts use stateful auto
3563 * configuration to obtain nonaddress related information (sets
3564 * the O-bit). Default is the O-bit is not set and the '<em>no</em>'
3565 * option returns it to this default state.
3567 * <em>[no] ra-suppress</em> - Disables sending ICMPv6 router-advertisement
3568 * messages. The '<em>no</em>' option implies to enable sending ICMPv6
3569 * router-advertisement messages.
3571 * <em>[no] ra-suppress-link-layer</em> - Indicates not to include the
3572 * optional source link-layer address in the ICMPv6 router-advertisement
3573 * messages. Default is to include the optional source link-layer address
3574 * and the '<em>no</em>' option returns it to this default state.
3576 * <em>[no] ra-send-unicast</em> - Use the source address of the
3577 * router-solicitation message if availiable. The default is to use
3578 * multicast address of all nodes, and the '<em>no</em>' option returns
3579 * it to this default state.
3581 * <em>[no] ra-lifetime <lifetime></em> - Advertises the lifetime of a
3582 * default router in ICMPv6 router-advertisement messages. The range is
3583 * from 0 to 9000 seconds. '<em><lifetime></em>' must be greater than
3584 * '<em><max-interval></em>'. The default value is 600 seconds and the
3585 * '<em>no</em>' option returns it to this default value.
3587 * <em>[no] ra-initial <cnt> <interval></em> - Number of initial ICMPv6
3588 * router-advertisement messages sent and the interval between each
3589 * message. Range for count is 1 - 3 and default is 3. Range for interval
3590 * is 1 to 16 seconds, and default is 16 seconds. The '<em>no</em>' option
3591 * returns both to their default value.
3593 * <em>[no] ra-interval <max-interval> [<min-interval>]</em> - Configures the
3594 * interval between sending ICMPv6 router-advertisement messages. The
3595 * range for max-interval is from 4 to 200 seconds. min-interval can not
3596 * be more than 75% of max-interval. If not set, min-interval will be
3597 * set to 75% of max-interval. The range for min-interval is from 3 to
3598 * 150 seconds. The '<em>no</em>' option returns both to their default
3601 * <em>[no] ra-cease</em> - Cease sending ICMPv6 router-advertisement messages.
3602 * The '<em>no</em>' options implies to start (or restart) sending
3603 * ICMPv6 router-advertisement messages.
3606 * <b>Format 2 - Prefix Options:</b>
3608 * '<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>'
3612 * <em>no</em> - All additional flags are ignored and the prefix is deleted.
3614 * <em><valid-lifetime> <pref-lifetime></em> - '<em><valid-lifetime></em>' is the
3615 * length of time in seconds during what the prefix is valid for the purpose of
3616 * on-link determination. Range is 7203 to 2592000 seconds and default is 2592000
3617 * seconds (30 days). '<em><pref-lifetime></em>' is the prefered-lifetime and is the
3618 * length of time in seconds during what addresses generated from the prefix remain
3619 * preferred. Range is 0 to 604800 seconds and default is 604800 seconds (7 days).
3621 * <em>infinite</em> - Both '<em><valid-lifetime></em>' and '<em><<pref-lifetime></em>'
3622 * are inifinte, no timeout.
3624 * <em>no-advertise</em> - Do not send full router address in prefix
3625 * advertisement. Default is to advertise (i.e. - This flag is off by default).
3627 * <em>off-link</em> - Prefix is off-link, clear L-bit in packet. Default is on-link
3628 * (i.e. - This flag is off and L-bit in packet is set by default and this prefix can
3629 * be used for on-link determination). '<em>no-onlink</em>' also controls the L-bit.
3631 * <em>no-autoconfig</em> - Do not use prefix for autoconfiguration, clear A-bit in packet.
3632 * Default is autoconfig (i.e. - This flag is off and A-bit in packet is set by default.
3634 * <em>no-onlink</em> - Do not use prefix for onlink determination, clear L-bit in packet.
3635 * Default is on-link (i.e. - This flag is off and L-bit in packet is set by default and
3636 * this prefix can be used for on-link determination). '<em>off-link</em>' also controls
3640 * <b>Format 3: - Default of Prefix:</b>
3642 * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> default</b></em>'
3644 * When a new prefix is added (or existing one is being overwritten) <em>default</em>
3645 * uses default values for the prefix. If <em>no</em> is used, the <em>default</em>
3646 * is ignored and the prefix is deleted.
3650 * Example of how set a router advertisement option:
3651 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 ra-interval 100 20}
3652 * Example of how to add a prefix:
3653 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 prefix fe80::fe:28ff:fe9c:75b3/64 infinite no-advertise}
3654 * Example of how to delete a prefix:
3655 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 no prefix fe80::fe:28ff:fe9c:75b3/64}
3658 VLIB_CLI_COMMAND (ip6_nd_command, static) =
3661 .short_help = "ip6 nd <interface> ...",
3662 .function = ip6_neighbor_cmd,
3667 set_ip6_link_local_address (vlib_main_t * vm,
3668 u32 sw_if_index, ip6_address_t * address)
3670 clib_error_t *error = 0;
3671 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3673 ip6_radv_t *radv_info;
3674 vnet_main_t *vnm = vnet_get_main ();
3676 if (!ip6_address_is_link_local_unicast (address))
3678 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_LINK_LOCAL;
3679 return (error = clib_error_return (0, "address not link-local",
3680 format_unformat_error));
3683 /* call enable ipv6 */
3684 enable_ip6_interface (vm, sw_if_index);
3686 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3690 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3692 /* save if link local address (overwrite default) */
3694 /* delete the old one */
3695 error = ip6_add_del_interface_address (vm, sw_if_index,
3696 &radv_info->link_local_address,
3697 128, 1 /* is_del */ );
3701 /* add the new one */
3702 error = ip6_add_del_interface_address (vm, sw_if_index,
3708 radv_info->link_local_address = *address;
3714 vnm->api_errno = VNET_API_ERROR_IP6_NOT_ENABLED;
3715 error = clib_error_return (0, "ip6 not enabled for interface",
3716 format_unformat_error);
3722 set_ip6_link_local_address_cmd (vlib_main_t * vm,
3723 unformat_input_t * input,
3724 vlib_cli_command_t * cmd)
3726 vnet_main_t *vnm = vnet_get_main ();
3727 clib_error_t *error = 0;
3729 ip6_address_t ip6_addr;
3731 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3733 /* get the rest of the command */
3734 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3736 if (unformat (input, "%U", unformat_ip6_address, &ip6_addr))
3739 return (unformat_parse_error (input));
3742 error = set_ip6_link_local_address (vm, sw_if_index, &ip6_addr);
3747 * This command is used to assign an IPv6 Link-local address to an
3748 * interface. This command will enable IPv6 on an interface if it
3749 * is not already enabled. Use the '<em>show ip6 interface</em>' command
3750 * to display the assigned Link-local address.
3753 * Example of how to assign an IPv6 Link-local address to an interface:
3754 * @cliexcmd{set ip6 link-local address GigabitEthernet2/0/0 FE80::AB8}
3757 VLIB_CLI_COMMAND (set_ip6_link_local_address_command, static) =
3759 .path = "set ip6 link-local address",
3760 .short_help = "set ip6 link-local address <interface> <ip6-address>",
3761 .function = set_ip6_link_local_address_cmd,
3766 * @brief callback when an interface address is added or deleted
3769 ip6_neighbor_add_del_interface_address (ip6_main_t * im,
3772 ip6_address_t * address,
3774 u32 if_address_index, u32 is_delete)
3776 vnet_main_t *vnm = vnet_get_main ();
3777 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3779 vlib_main_t *vm = vnm->vlib_main;
3780 ip6_radv_t *radv_info;
3783 /* create solicited node multicast address for this interface adddress */
3784 ip6_set_solicited_node_multicast_address (&a, 0);
3786 a.as_u8[0xd] = address->as_u8[0xd];
3787 a.as_u8[0xe] = address->as_u8[0xe];
3788 a.as_u8[0xf] = address->as_u8[0xf];
3792 /* try to create radv_info - does nothing if ipv6 already enabled */
3793 enable_ip6_interface (vm, sw_if_index);
3795 /* look up the radv_t information for this interface */
3796 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3798 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3802 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3805 if (!ip6_address_is_link_local_unicast (address))
3806 radv_info->ref_count++;
3808 ip6_neighbor_add_mld_prefix (radv_info, &a);
3815 /* look up the radv_t information for this interface */
3816 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3818 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3823 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3825 ip6_neighbor_del_mld_prefix (radv_info, &a);
3827 /* if interface up send MLDP "report" */
3828 radv_info->all_routers_mcast = 0;
3831 if (!ip6_address_is_link_local_unicast (address))
3832 radv_info->ref_count--;
3834 /* Ensure that IPv6 is disabled, and LL removed after ref_count reaches 0 */
3835 disable_ip6_interface (vm, sw_if_index);
3840 ip6_set_neighbor_limit (u32 neighbor_limit)
3842 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3844 nm->limit_neighbor_cache_size = neighbor_limit;
3848 static clib_error_t *
3849 ip6_neighbor_init (vlib_main_t * vm)
3851 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3852 ip6_main_t *im = &ip6_main;
3854 mhash_init (&nm->neighbor_index_by_key,
3855 /* value size */ sizeof (uword),
3856 /* key size */ sizeof (ip6_neighbor_key_t));
3858 icmp6_register_type (vm, ICMP6_neighbor_solicitation,
3859 ip6_icmp_neighbor_solicitation_node.index);
3860 icmp6_register_type (vm, ICMP6_neighbor_advertisement,
3861 ip6_icmp_neighbor_advertisement_node.index);
3862 icmp6_register_type (vm, ICMP6_router_solicitation,
3863 ip6_icmp_router_solicitation_node.index);
3864 icmp6_register_type (vm, ICMP6_router_advertisement,
3865 ip6_icmp_router_advertisement_node.index);
3867 /* handler node for ip6 neighbor discovery events and timers */
3868 vlib_register_node (vm, &ip6_icmp_neighbor_discovery_event_node);
3870 /* add call backs */
3871 ip6_add_del_interface_address_callback_t cb;
3872 memset (&cb, 0x0, sizeof (ip6_add_del_interface_address_callback_t));
3874 /* when an interface address changes... */
3875 cb.function = ip6_neighbor_add_del_interface_address;
3876 cb.function_opaque = 0;
3877 vec_add1 (im->add_del_interface_address_callbacks, cb);
3879 mhash_init (&nm->pending_resolutions_by_address,
3880 /* value size */ sizeof (uword),
3881 /* key size */ sizeof (ip6_address_t));
3883 mhash_init (&nm->mac_changes_by_address,
3884 /* value size */ sizeof (uword),
3885 /* key size */ sizeof (ip6_address_t));
3887 /* default, configurable */
3888 nm->limit_neighbor_cache_size = 50000;
3891 /* $$$$ Hack fix for today */
3892 vec_validate_init_empty
3893 (im->discover_neighbor_next_index_by_hw_if_index, 32, 0 /* drop */ );
3899 VLIB_INIT_FUNCTION (ip6_neighbor_init);
3903 vnet_register_ip6_neighbor_resolution_event (vnet_main_t * vnm,
3906 uword type_opaque, uword data)
3908 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3909 ip6_address_t *address = address_arg;
3911 pending_resolution_t *pr;
3913 pool_get (nm->pending_resolutions, pr);
3915 pr->next_index = ~0;
3916 pr->node_index = node_index;
3917 pr->type_opaque = type_opaque;
3920 p = mhash_get (&nm->pending_resolutions_by_address, address);
3923 /* Insert new resolution at the head of the list */
3924 pr->next_index = p[0];
3925 mhash_unset (&nm->pending_resolutions_by_address, address, 0);
3928 mhash_set (&nm->pending_resolutions_by_address, address,
3929 pr - nm->pending_resolutions, 0 /* old value */ );
3933 vnet_add_del_ip6_nd_change_event (vnet_main_t * vnm,
3934 void *data_callback,
3938 uword type_opaque, uword data, int is_add)
3940 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3941 ip6_address_t *address = address_arg;
3943 /* Try to find an existing entry */
3944 u32 *first = (u32 *) mhash_get (&nm->mac_changes_by_address, address);
3946 pending_resolution_t *mc;
3947 while (p && *p != ~0)
3949 mc = pool_elt_at_index (nm->mac_changes, *p);
3950 if (mc->node_index == node_index && mc->type_opaque == type_opaque
3953 p = &mc->next_index;
3956 int found = p && *p != ~0;
3960 return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
3962 pool_get (nm->mac_changes, mc);
3963 *mc = (pending_resolution_t)
3965 .next_index = ~0,.node_index = node_index,.type_opaque =
3966 type_opaque,.data = data,.data_callback = data_callback,.pid =
3969 /* Insert new resolution at the end of the list */
3970 u32 new_idx = mc - nm->mac_changes;
3974 mhash_set (&nm->mac_changes_by_address, address, new_idx, 0);
3979 return VNET_API_ERROR_NO_SUCH_ENTRY;
3981 /* Clients may need to clean up pool entries, too */
3982 void (*fp) (u32, u8 *) = data_callback;
3984 (*fp) (mc->data, 0 /* no new mac addrs */ );
3986 /* Remove the entry from the list and delete the entry */
3987 *p = mc->next_index;
3988 pool_put (nm->mac_changes, mc);
3990 /* Remove from hash if we deleted the last entry */
3991 if (*p == ~0 && p == first)
3992 mhash_unset (&nm->mac_changes_by_address, address, 0);
3998 vnet_ip6_nd_term (vlib_main_t * vm,
3999 vlib_node_runtime_t * node,
4001 ethernet_header_t * eth,
4002 ip6_header_t * ip, u32 sw_if_index, u16 bd_index)
4004 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4005 icmp6_neighbor_solicitation_or_advertisement_header_t *ndh;
4006 pending_resolution_t *mc;
4008 ndh = ip6_next_header (ip);
4009 if (ndh->icmp.type != ICMP6_neighbor_solicitation &&
4010 ndh->icmp.type != ICMP6_neighbor_advertisement)
4013 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
4014 (p0->flags & VLIB_BUFFER_IS_TRACED)))
4016 u8 *t0 = vlib_add_trace (vm, node, p0,
4017 sizeof (icmp6_input_trace_t));
4018 clib_memcpy (t0, ip, sizeof (icmp6_input_trace_t));
4021 /* Check if anyone want ND events for L2 BDs */
4022 uword *p = mhash_get (&nm->mac_changes_by_address, &ip6a_zero);
4023 if (p && !ip6_address_is_link_local_unicast (&ip->src_address))
4025 u32 next_index = p[0];
4026 while (next_index != (u32) ~ 0)
4028 int (*fp) (u32, u8 *, u32, ip6_address_t *);
4030 mc = pool_elt_at_index (nm->mac_changes, next_index);
4031 fp = mc->data_callback;
4032 /* Call the callback, return 1 to suppress dup events */
4034 rv = (*fp) (mc->data,
4035 eth->src_address, sw_if_index, &ip->src_address);
4036 /* Signal the resolver process */
4038 vlib_process_signal_event (vm, mc->node_index,
4039 mc->type_opaque, mc->data);
4040 next_index = mc->next_index;
4044 /* Check if MAC entry exsist for solicited target IP */
4045 if (ndh->icmp.type == ICMP6_neighbor_solicitation)
4047 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *opt;
4048 l2_bridge_domain_t *bd_config;
4051 opt = (void *) (ndh + 1);
4052 if ((opt->header.type !=
4053 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address) ||
4054 (opt->header.n_data_u64s != 1))
4055 return 0; /* source link layer address option not present */
4057 bd_config = vec_elt_at_index (l2input_main.bd_configs, bd_index);
4059 (u8 *) hash_get_mem (bd_config->mac_by_ip6, &ndh->target_address);
4061 { /* found ip-mac entry, generate eighbor advertisement response */
4063 vlib_node_runtime_t *error_node =
4064 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
4065 ip->dst_address = ip->src_address;
4066 ip->src_address = ndh->target_address;
4067 ip->hop_limit = 255;
4069 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
4070 clib_memcpy (opt->ethernet_address, macp, 6);
4071 ndh->icmp.type = ICMP6_neighbor_advertisement;
4072 ndh->advertisement_flags = clib_host_to_net_u32
4073 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED |
4074 ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
4075 ndh->icmp.checksum = 0;
4076 ndh->icmp.checksum =
4077 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip, &bogus_length);
4078 clib_memcpy (eth->dst_address, eth->src_address, 6);
4079 clib_memcpy (eth->src_address, macp, 6);
4080 vlib_error_count (vm, error_node->node_index,
4081 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX, 1);
4091 ip6_neighbor_proxy_add_del (u32 sw_if_index, ip6_address_t * addr, u8 is_del)
4095 fib_prefix_t pfx = {
4097 .fp_proto = FIB_PROTOCOL_IP6,
4102 ip46_address_t nh = {
4106 fib_index = ip6_fib_table_get_index_for_sw_if_index (sw_if_index);
4108 if (~0 == fib_index)
4109 return VNET_API_ERROR_NO_SUCH_FIB;
4113 fib_table_entry_path_remove (fib_index,
4115 FIB_SOURCE_IP6_ND_PROXY,
4119 ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
4120 /* flush the ND cache of this address if it's there */
4121 vnet_unset_ip6_ethernet_neighbor (vlib_get_main (),
4122 sw_if_index, addr, NULL, 0);
4126 fib_table_entry_path_add (fib_index,
4128 FIB_SOURCE_IP6_ND_PROXY,
4129 FIB_ENTRY_FLAG_NONE,
4133 ~0, 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
4138 static clib_error_t *
4139 set_ip6_nd_proxy_cmd (vlib_main_t * vm,
4140 unformat_input_t * input, vlib_cli_command_t * cmd)
4142 vnet_main_t *vnm = vnet_get_main ();
4143 clib_error_t *error = 0;
4148 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4150 /* get the rest of the command */
4151 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
4153 if (unformat (input, "%U", unformat_ip6_address, &addr))
4155 else if (unformat (input, "delete") || unformat (input, "del"))
4158 return (unformat_parse_error (input));
4162 ip6_neighbor_proxy_add_del (sw_if_index, &addr, is_del);
4168 VLIB_CLI_COMMAND (set_ip6_nd_proxy_command, static) =
4170 .path = "set ip6 nd proxy",
4171 .short_help = "set ip6 nd proxy <HOST> <INTERFACE>",
4172 .function = set_ip6_nd_proxy_cmd,
4177 ethernet_ndp_change_mac (u32 sw_if_index)
4179 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4183 pool_foreach (n, nm->neighbor_pool,
4185 if (n->key.sw_if_index == sw_if_index)
4187 adj_nbr_walk_nh6 (sw_if_index,
4188 &n->key.ip6_address,
4189 ip6_nd_mk_complete_walk, n);
4196 * fd.io coding-style-patch-verification: ON
4199 * eval: (c-set-style "gnu")