2 * ip/ip6_neighbor.c: IP6 neighbor handling
4 * Copyright (c) 2010 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
18 #include <vnet/ip/ip.h>
19 #include <vnet/ip/ip6_neighbor.h>
20 #include <vnet/ethernet/ethernet.h>
21 #include <vppinfra/mhash.h>
22 #include <vnet/adj/adj.h>
23 #include <vnet/adj/adj_mcast.h>
24 #include <vnet/fib/fib_table.h>
25 #include <vnet/fib/ip6_fib.h>
26 #include <vnet/mfib/ip6_mfib.h>
27 #include <vnet/ip/ip6_ll_table.h>
31 * @brief IPv6 Neighbor Adjacency and Neighbor Discovery.
33 * The files contains the API and CLI code for managing IPv6 neighbor
34 * adjacency tables and neighbor discovery logic.
37 /* can't use sizeof link_layer_address, that's 8 */
38 #define ETHER_MAC_ADDR_LEN 6
40 /* advertised prefix option */
43 /* basic advertised information */
47 int adv_autonomous_flag;
48 u32 adv_valid_lifetime_in_secs;
49 u32 adv_pref_lifetime_in_secs;
51 /* advertised values are computed from these times if decrementing */
52 f64 valid_lifetime_expires;
53 f64 pref_lifetime_expires;
55 /* local information */
57 int deprecated_prefix_flag;
58 int decrement_lifetime_flag;
60 #define MIN_ADV_VALID_LIFETIME 7203 /* seconds */
61 #define DEF_ADV_VALID_LIFETIME 2592000
62 #define DEF_ADV_PREF_LIFETIME 604800
64 /* extensions are added here, mobile, DNS etc.. */
70 /* group information */
72 ip6_address_t mcast_address;
74 ip6_address_t *mcast_source_address_pool;
77 /* configured router advertisement information per ipv6 interface */
81 /* advertised config information, zero means unspecified */
85 u16 adv_router_lifetime_in_sec;
86 u32 adv_neighbor_reachable_time_in_msec;
87 u32 adv_time_in_msec_between_retransmitted_neighbor_solicitations;
92 /* source link layer option */
93 u8 link_layer_address[8];
94 u8 link_layer_addr_len;
97 ip6_radv_prefix_t *adv_prefixes_pool;
99 /* Hash table mapping address to index in interface advertised prefix pool. */
100 mhash_t address_to_prefix_index;
102 /* MLDP group information */
103 ip6_mldp_group_t *mldp_group_pool;
105 /* Hash table mapping address to index in mldp address pool. */
106 mhash_t address_to_mldp_index;
108 /* local information */
110 int send_radv; /* radv on/off on this interface - set by config */
111 int cease_radv; /* we are ceasing to send - set byf config */
113 int adv_link_layer_address;
115 int failed_device_check;
116 int all_routers_mcast;
120 adj_index_t mcast_adj_index;
122 /* timing information */
123 #define DEF_MAX_RADV_INTERVAL 200
124 #define DEF_MIN_RADV_INTERVAL .75 * DEF_MAX_RADV_INTERVAL
125 #define DEF_CURR_HOP_LIMIT 64
126 #define DEF_DEF_RTR_LIFETIME 3 * DEF_MAX_RADV_INTERVAL
127 #define MAX_DEF_RTR_LIFETIME 9000
129 #define MAX_INITIAL_RTR_ADVERT_INTERVAL 16 /* seconds */
130 #define MAX_INITIAL_RTR_ADVERTISEMENTS 3 /*transmissions */
131 #define MIN_DELAY_BETWEEN_RAS 3 /* seconds */
132 #define MAX_DELAY_BETWEEN_RAS 1800 /* seconds */
133 #define MAX_RA_DELAY_TIME .5 /* seconds */
135 f64 max_radv_interval;
136 f64 min_radv_interval;
137 f64 min_delay_between_radv;
138 f64 max_delay_between_radv;
139 f64 max_rtr_default_lifetime;
142 f64 last_multicast_time;
143 f64 next_multicast_time;
146 u32 initial_adverts_count;
147 f64 initial_adverts_interval;
148 u32 initial_adverts_sent;
151 u32 n_advertisements_sent;
152 u32 n_solicitations_rcvd;
153 u32 n_solicitations_dropped;
155 /* Link local address to use (defaults to underlying physical for logical interfaces */
156 ip6_address_t link_local_address;
158 /* router solicitations sending state */
159 u8 keep_sending_rs; /* when true then next fields are valid */
160 icmp6_send_router_solicitation_params_t params;
165 vlib_buffer_t *buffer;
174 /* Used for nd event notification only */
177 } pending_resolution_t;
182 /* Hash tables mapping name to opcode. */
183 uword *opcode_by_name;
185 /* lite beer "glean" adjacency handling */
186 mhash_t pending_resolutions_by_address;
187 pending_resolution_t *pending_resolutions;
189 /* Mac address change notification */
190 mhash_t mac_changes_by_address;
191 pending_resolution_t *mac_changes;
193 u32 *neighbor_input_next_index_by_hw_if_index;
195 ip6_neighbor_t *neighbor_pool;
197 mhash_t neighbor_index_by_key;
199 u32 *if_radv_pool_index_by_sw_if_index;
201 ip6_radv_t *if_radv_pool;
203 /* Neighbor attack mitigation */
204 u32 limit_neighbor_cache_size;
205 u32 neighbor_delete_rotor;
207 /* Wildcard nd report publisher */
208 uword wc_ip6_nd_publisher_node;
209 uword wc_ip6_nd_publisher_et;
211 /* Router advertisement report publisher */
212 uword ip6_ra_publisher_node;
213 uword ip6_ra_publisher_et;
214 } ip6_neighbor_main_t;
216 /* ipv6 neighbor discovery - timer/event types */
220 } ip6_icmp_neighbor_discovery_event_type_t;
230 } ip6_icmp_neighbor_discovery_event_data_t;
232 static ip6_neighbor_main_t ip6_neighbor_main;
233 ip6_neighbor_public_main_t ip6_neighbor_public_main;
234 static ip6_address_t ip6a_zero; /* ip6 address 0 */
236 static void wc_nd_signal_report (wc_nd_report_t * r);
237 static void ra_signal_report (ra_report_t * r);
240 ip6_neighbor_get_link_local_address (u32 sw_if_index)
242 static ip6_address_t empty_address = { {0} };
243 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
244 ip6_radv_t *radv_info;
247 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
250 clib_warning ("IPv6 is not enabled for sw_if_index %d", sw_if_index);
251 return empty_address;
253 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
254 if (radv_info == NULL)
256 clib_warning ("Internal error");
257 return empty_address;
259 return radv_info->link_local_address;
263 * @brief publish wildcard arp event
264 * @param sw_if_index The interface on which the ARP entires are acted
267 vnet_nd_wc_publish (u32 sw_if_index, u8 * mac, ip6_address_t * ip6)
270 .sw_if_index = sw_if_index,
273 memcpy (r.mac, mac, sizeof r.mac);
275 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
276 vl_api_rpc_call_main_thread (wc_nd_signal_report, (u8 *) & r, sizeof r);
281 wc_nd_signal_report (wc_nd_report_t * r)
283 vlib_main_t *vm = vlib_get_main ();
284 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
285 uword ni = nm->wc_ip6_nd_publisher_node;
286 uword et = nm->wc_ip6_nd_publisher_et;
288 if (ni == (uword) ~ 0)
291 vlib_process_signal_event_data (vm, ni, et, 1, sizeof *q);
297 wc_nd_set_publisher_node (uword node_index, uword event_type)
299 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
300 nm->wc_ip6_nd_publisher_node = node_index;
301 nm->wc_ip6_nd_publisher_et = event_type;
305 ra_publish (ra_report_t * r)
307 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
308 vl_api_rpc_call_main_thread (ra_signal_report, (u8 *) r, sizeof *r);
313 ra_signal_report (ra_report_t * r)
315 vlib_main_t *vm = vlib_get_main ();
316 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
317 uword ni = nm->ip6_ra_publisher_node;
318 uword et = nm->ip6_ra_publisher_et;
320 if (ni == (uword) ~ 0)
322 ra_report_t *q = vlib_process_signal_event_data (vm, ni, et, 1, sizeof *q);
328 ra_set_publisher_node (uword node_index, uword event_type)
330 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
331 nm->ip6_ra_publisher_node = node_index;
332 nm->ip6_ra_publisher_et = event_type;
336 format_ip6_neighbor_ip6_entry (u8 * s, va_list * va)
338 vlib_main_t *vm = va_arg (*va, vlib_main_t *);
339 ip6_neighbor_t *n = va_arg (*va, ip6_neighbor_t *);
340 vnet_main_t *vnm = vnet_get_main ();
341 vnet_sw_interface_t *si;
345 return format (s, "%=12s%=45s%=6s%=20s%=40s", "Time", "Address", "Flags",
346 "Link layer", "Interface");
348 if (n->flags & IP6_NEIGHBOR_FLAG_DYNAMIC)
349 flags = format (flags, "D");
351 if (n->flags & IP6_NEIGHBOR_FLAG_STATIC)
352 flags = format (flags, "S");
354 if (n->flags & IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY)
355 flags = format (flags, "N");
357 si = vnet_get_sw_interface (vnm, n->key.sw_if_index);
358 s = format (s, "%=12U%=45U%=6s%=20U%=40U",
359 format_vlib_time, vm, n->time_last_updated,
360 format_ip6_address, &n->key.ip6_address,
361 flags ? (char *) flags : "",
362 format_ethernet_address, n->link_layer_address,
363 format_vnet_sw_interface_name, vnm, si);
370 ip6_neighbor_adj_fib_remove (ip6_neighbor_t * n, u32 fib_index)
372 if (FIB_NODE_INDEX_INVALID != n->fib_entry_index)
374 if (ip6_address_is_link_local_unicast (&n->key.ip6_address))
376 ip6_ll_prefix_t pfx = {
377 .ilp_addr = n->key.ip6_address,
378 .ilp_sw_if_index = n->key.sw_if_index,
380 ip6_ll_table_entry_delete (&pfx);
386 .fp_proto = FIB_PROTOCOL_IP6,
387 .fp_addr.ip6 = n->key.ip6_address,
389 fib_table_entry_path_remove (fib_index,
394 n->key.sw_if_index, ~0,
395 1, FIB_ROUTE_PATH_FLAG_NONE);
405 u8 link_layer_address[6];
408 } ip6_neighbor_set_unset_rpc_args_t;
410 static void ip6_neighbor_set_unset_rpc_callback
411 (ip6_neighbor_set_unset_rpc_args_t * a);
413 static void set_unset_ip6_neighbor_rpc
416 ip6_address_t * a, u8 * link_layer_address, int is_add, int is_static,
419 ip6_neighbor_set_unset_rpc_args_t args;
420 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
422 args.sw_if_index = sw_if_index;
423 args.is_add = is_add;
424 args.is_static = is_static;
425 args.is_no_fib_entry = is_no_fib_entry;
426 clib_memcpy (&args.addr, a, sizeof (*a));
427 if (NULL != link_layer_address)
428 clib_memcpy (args.link_layer_address, link_layer_address, 6);
430 vl_api_rpc_call_main_thread (ip6_neighbor_set_unset_rpc_callback,
431 (u8 *) & args, sizeof (args));
435 ip6_nbr_probe (ip_adjacency_t * adj)
437 icmp6_neighbor_solicitation_header_t *h;
438 vnet_main_t *vnm = vnet_get_main ();
439 ip6_main_t *im = &ip6_main;
440 ip_interface_address_t *ia;
441 ip6_address_t *dst, *src;
442 vnet_hw_interface_t *hi;
443 vnet_sw_interface_t *si;
449 vm = vlib_get_main ();
451 si = vnet_get_sw_interface (vnm, adj->rewrite_header.sw_if_index);
452 dst = &adj->sub_type.nbr.next_hop.ip6;
454 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
458 src = ip6_interface_address_matching_destination (im, dst,
466 h = vlib_packet_template_get_packet (vm,
467 &im->discover_neighbor_packet_template,
472 hi = vnet_get_sup_hw_interface (vnm, adj->rewrite_header.sw_if_index);
474 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
475 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
476 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
477 h->ip.src_address = src[0];
478 h->neighbor.target_address = dst[0];
480 clib_memcpy (h->link_layer_option.ethernet_address,
481 hi->hw_address, vec_len (hi->hw_address));
483 h->neighbor.icmp.checksum =
484 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
485 ASSERT (bogus_length == 0);
487 b = vlib_get_buffer (vm, bi);
488 vnet_buffer (b)->sw_if_index[VLIB_RX] =
489 vnet_buffer (b)->sw_if_index[VLIB_TX] = adj->rewrite_header.sw_if_index;
491 /* Add encapsulation string for software interface (e.g. ethernet header). */
492 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
493 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
496 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
497 u32 *to_next = vlib_frame_vector_args (f);
500 vlib_put_frame_to_node (vm, hi->output_node_index, f);
505 ip6_nd_mk_complete (adj_index_t ai, ip6_neighbor_t * nbr)
507 adj_nbr_update_rewrite (ai, ADJ_NBR_REWRITE_FLAG_COMPLETE,
508 ethernet_build_rewrite (vnet_get_main (),
509 nbr->key.sw_if_index,
510 adj_get_link_type (ai),
511 nbr->link_layer_address));
515 ip6_nd_mk_incomplete (adj_index_t ai)
517 ip_adjacency_t *adj = adj_get (ai);
519 adj_nbr_update_rewrite (ai,
520 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
521 ethernet_build_rewrite (vnet_get_main (),
524 adj_get_link_type (ai),
525 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
528 #define IP6_NBR_MK_KEY(k, sw_if_index, addr) \
530 k.sw_if_index = sw_if_index; \
531 k.ip6_address = *addr; \
535 static ip6_neighbor_t *
536 ip6_nd_find (u32 sw_if_index, const ip6_address_t * addr)
538 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
539 ip6_neighbor_t *n = NULL;
540 ip6_neighbor_key_t k;
543 IP6_NBR_MK_KEY (k, sw_if_index, addr);
545 p = mhash_get (&nm->neighbor_index_by_key, &k);
548 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
555 ip6_nd_mk_complete_walk (adj_index_t ai, void *ctx)
557 ip6_neighbor_t *nbr = ctx;
559 ip6_nd_mk_complete (ai, nbr);
561 return (ADJ_WALK_RC_CONTINUE);
565 ip6_nd_mk_incomplete_walk (adj_index_t ai, void *ctx)
567 ip6_nd_mk_incomplete (ai);
569 return (ADJ_WALK_RC_CONTINUE);
572 static clib_error_t *
573 ip6_neighbor_sw_interface_up_down (vnet_main_t * vnm,
574 u32 sw_if_index, u32 flags)
576 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
578 u32 i, *to_delete = 0;
581 pool_foreach (n, nm->neighbor_pool,
583 if (n->key.sw_if_index == sw_if_index)
584 vec_add1 (to_delete, n - nm->neighbor_pool);
588 if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
590 for (i = 0; i < vec_len (to_delete); i++)
592 n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
593 adj_nbr_walk_nh6 (n->key.sw_if_index, &n->key.ip6_address,
594 ip6_nd_mk_complete_walk, n);
599 for (i = 0; i < vec_len (to_delete); i++)
601 n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
602 adj_nbr_walk_nh6 (n->key.sw_if_index, &n->key.ip6_address,
603 ip6_nd_mk_incomplete_walk, NULL);
604 if (n->flags & IP6_NEIGHBOR_FLAG_STATIC)
606 ip6_neighbor_adj_fib_remove (n,
607 ip6_fib_table_get_index_for_sw_if_index
608 (n->key.sw_if_index));
609 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
610 pool_put (nm->neighbor_pool, n);
614 vec_free (to_delete);
618 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_neighbor_sw_interface_up_down);
621 ip6_ethernet_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
628 nbr = ip6_nd_find (sw_if_index, &adj->sub_type.nbr.next_hop.ip6);
630 switch (adj->lookup_next_index)
632 case IP_LOOKUP_NEXT_GLEAN:
633 adj_glean_update_rewrite (ai);
635 case IP_LOOKUP_NEXT_ARP:
638 adj_nbr_walk_nh6 (sw_if_index, &nbr->key.ip6_address,
639 ip6_nd_mk_complete_walk, nbr);
644 * no matching ND entry.
645 * construct the rewrite required to for an ND packet, and stick
646 * that in the adj's pipe to smoke.
648 adj_nbr_update_rewrite (ai,
649 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
650 ethernet_build_rewrite (vnm,
653 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
656 * since the FIB has added this adj for a route, it makes sense it may
657 * want to forward traffic sometime soon. Let's send a speculative ND.
658 * just one. If we were to do periodically that wouldn't be bad either,
659 * but that's more code than i'm prepared to write at this time for
660 * relatively little reward.
665 case IP_LOOKUP_NEXT_BCAST:
666 adj_nbr_update_rewrite (ai,
667 ADJ_NBR_REWRITE_FLAG_COMPLETE,
668 ethernet_build_rewrite (vnm,
671 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
673 case IP_LOOKUP_NEXT_MCAST:
676 * Construct a partial rewrite from the known ethernet mcast dest MAC
681 rewrite = ethernet_build_rewrite (vnm,
684 ethernet_ip6_mcast_dst_addr ());
687 * Complete the remaining fields of the adj's rewrite to direct the
688 * complete of the rewrite at switch time by copying in the IP
689 * dst address's bytes.
690 * Ofset is 2 bytes into the desintation address.
692 offset = vec_len (rewrite) - 2;
693 adj_mcast_update_rewrite (ai, rewrite, offset);
697 case IP_LOOKUP_NEXT_DROP:
698 case IP_LOOKUP_NEXT_PUNT:
699 case IP_LOOKUP_NEXT_LOCAL:
700 case IP_LOOKUP_NEXT_REWRITE:
701 case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
702 case IP_LOOKUP_NEXT_MIDCHAIN:
703 case IP_LOOKUP_NEXT_ICMP_ERROR:
704 case IP_LOOKUP_N_NEXT:
712 ip6_neighbor_adj_fib_add (ip6_neighbor_t * n, u32 fib_index)
714 if (ip6_address_is_link_local_unicast (&n->key.ip6_address))
716 ip6_ll_prefix_t pfx = {
717 .ilp_addr = n->key.ip6_address,
718 .ilp_sw_if_index = n->key.sw_if_index,
721 ip6_ll_table_entry_update (&pfx, FIB_ROUTE_PATH_FLAG_NONE);
727 .fp_proto = FIB_PROTOCOL_IP6,
728 .fp_addr.ip6 = n->key.ip6_address,
732 fib_table_entry_path_add (fib_index, &pfx, FIB_SOURCE_ADJ,
733 FIB_ENTRY_FLAG_ATTACHED,
734 DPO_PROTO_IP6, &pfx.fp_addr,
735 n->key.sw_if_index, ~0, 1, NULL,
736 FIB_ROUTE_PATH_FLAG_NONE);
740 static ip6_neighbor_t *
741 force_reuse_neighbor_entry (void)
744 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
746 u32 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
747 if (index == ~0) /* Try again from elt 0 */
748 index = pool_next_index (nm->neighbor_pool, index);
750 /* Find a non-static random entry to free up for reuse */
753 if ((count++ == 100) || (index == ~0))
754 return NULL; /* give up after 100 entries */
755 n = pool_elt_at_index (nm->neighbor_pool, index);
756 nm->neighbor_delete_rotor = index;
757 index = pool_next_index (nm->neighbor_pool, index);
759 while (n->flags & IP6_NEIGHBOR_FLAG_STATIC);
761 /* Remove ARP entry from its interface and update fib */
762 adj_nbr_walk_nh6 (n->key.sw_if_index,
763 &n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL);
764 ip6_neighbor_adj_fib_remove
765 (n, ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index));
766 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
772 vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
775 u8 * link_layer_address,
776 uword n_bytes_link_layer_address,
777 int is_static, int is_no_fib_entry)
779 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
780 ip6_neighbor_key_t k;
781 ip6_neighbor_t *n = 0;
782 int make_new_nd_cache_entry = 1;
785 pending_resolution_t *pr, *mc;
787 if (vlib_get_thread_index ())
789 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
790 1 /* set new neighbor */ , is_static,
795 k.sw_if_index = sw_if_index;
796 k.ip6_address = a[0];
799 p = mhash_get (&nm->neighbor_index_by_key, &k);
802 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
803 /* Refuse to over-write static neighbor entry. */
804 if (!is_static && (n->flags & IP6_NEIGHBOR_FLAG_STATIC))
806 /* if MAC address match, still check to send event */
807 if (0 == memcmp (n->link_layer_address,
808 link_layer_address, n_bytes_link_layer_address))
809 goto check_customers;
812 make_new_nd_cache_entry = 0;
815 if (make_new_nd_cache_entry)
817 if (nm->limit_neighbor_cache_size &&
818 pool_elts (nm->neighbor_pool) >= nm->limit_neighbor_cache_size)
820 n = force_reuse_neighbor_entry ();
825 pool_get (nm->neighbor_pool, n);
827 mhash_set (&nm->neighbor_index_by_key, &k, n - nm->neighbor_pool,
830 n->fib_entry_index = FIB_NODE_INDEX_INVALID;
832 clib_memcpy (n->link_layer_address,
833 link_layer_address, n_bytes_link_layer_address);
836 * create the adj-fib. the entry in the FIB table for and to the peer.
838 if (!is_no_fib_entry)
840 ip6_neighbor_adj_fib_add
841 (n, ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index));
845 n->flags |= IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY;
851 * prevent a DoS attack from the data-plane that
852 * spams us with no-op updates to the MAC address
854 if (0 == memcmp (n->link_layer_address,
855 link_layer_address, n_bytes_link_layer_address))
857 n->time_last_updated = vlib_time_now (vm);
858 goto check_customers;
861 clib_memcpy (n->link_layer_address,
862 link_layer_address, n_bytes_link_layer_address);
865 /* Update time stamp and flags. */
866 n->time_last_updated = vlib_time_now (vm);
869 n->flags |= IP6_NEIGHBOR_FLAG_STATIC;
870 n->flags &= ~IP6_NEIGHBOR_FLAG_DYNAMIC;
874 n->flags |= IP6_NEIGHBOR_FLAG_DYNAMIC;
875 n->flags &= ~IP6_NEIGHBOR_FLAG_STATIC;
878 adj_nbr_walk_nh6 (sw_if_index,
879 &n->key.ip6_address, ip6_nd_mk_complete_walk, n);
882 /* Customer(s) waiting for this address to be resolved? */
883 p = mhash_get (&nm->pending_resolutions_by_address, a);
888 while (next_index != (u32) ~ 0)
890 pr = pool_elt_at_index (nm->pending_resolutions, next_index);
891 vlib_process_signal_event (vm, pr->node_index,
892 pr->type_opaque, pr->data);
893 next_index = pr->next_index;
894 pool_put (nm->pending_resolutions, pr);
897 mhash_unset (&nm->pending_resolutions_by_address, a, 0);
900 /* Customer(s) requesting ND event for this address? */
901 p = mhash_get (&nm->mac_changes_by_address, a);
906 while (next_index != (u32) ~ 0)
908 int (*fp) (u32, u8 *, u32, ip6_address_t *);
910 mc = pool_elt_at_index (nm->mac_changes, next_index);
911 fp = mc->data_callback;
913 /* Call the user's data callback, return 1 to suppress dup events */
916 (*fp) (mc->data, link_layer_address, sw_if_index, &ip6a_zero);
918 * Signal the resolver process, as long as the user
919 * says they want to be notified
922 vlib_process_signal_event (vm, mc->node_index,
923 mc->type_opaque, mc->data);
924 next_index = mc->next_index;
932 vnet_unset_ip6_ethernet_neighbor (vlib_main_t * vm,
935 u8 * link_layer_address,
936 uword n_bytes_link_layer_address)
938 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
939 ip6_neighbor_key_t k;
944 if (vlib_get_thread_index ())
946 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
947 0 /* unset */ , 0, 0);
951 k.sw_if_index = sw_if_index;
952 k.ip6_address = a[0];
955 p = mhash_get (&nm->neighbor_index_by_key, &k);
962 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
964 adj_nbr_walk_nh6 (sw_if_index,
965 &n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL);
966 ip6_neighbor_adj_fib_remove
967 (n, ip6_fib_table_get_index_for_sw_if_index (sw_if_index));
969 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
970 pool_put (nm->neighbor_pool, n);
976 static void ip6_neighbor_set_unset_rpc_callback
977 (ip6_neighbor_set_unset_rpc_args_t * a)
979 vlib_main_t *vm = vlib_get_main ();
981 vnet_set_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
982 a->link_layer_address, 6, a->is_static,
985 vnet_unset_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
986 a->link_layer_address, 6);
990 ip6_neighbor_sort (void *a1, void *a2)
992 vnet_main_t *vnm = vnet_get_main ();
993 ip6_neighbor_t *n1 = a1, *n2 = a2;
995 cmp = vnet_sw_interface_compare (vnm, n1->key.sw_if_index,
996 n2->key.sw_if_index);
998 cmp = ip6_address_compare (&n1->key.ip6_address, &n2->key.ip6_address);
1003 ip6_neighbors_pool (void)
1005 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1006 return nm->neighbor_pool;
1010 ip6_neighbors_entries (u32 sw_if_index)
1012 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1013 ip6_neighbor_t *n, *ns = 0;
1016 pool_foreach (n, nm->neighbor_pool,
1018 if (sw_if_index != ~0 && n->key.sw_if_index != sw_if_index)
1020 vec_add1 (ns, n[0]);
1025 vec_sort_with_function (ns, ip6_neighbor_sort);
1029 static clib_error_t *
1030 show_ip6_neighbors (vlib_main_t * vm,
1031 unformat_input_t * input, vlib_cli_command_t * cmd)
1033 vnet_main_t *vnm = vnet_get_main ();
1034 ip6_neighbor_t *n, *ns;
1035 clib_error_t *error = 0;
1038 /* Filter entries by interface if given. */
1040 (void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index);
1042 ns = ip6_neighbors_entries (sw_if_index);
1045 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, 0);
1048 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, n);
1057 * This command is used to display the adjacent IPv6 hosts found via
1058 * neighbor discovery. Optionally, limit the output to the specified
1062 * Example of how to display the IPv6 neighbor adjacency table:
1063 * @cliexstart{show ip6 neighbors}
1064 * Time Address Flags Link layer Interface
1065 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
1066 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
1067 * 886.6654 ::1:1:c:0:9 S 02:fe:e4:45:27:5b GigabitEthernet3/0/0
1069 * Example of how to display the IPv6 neighbor adjacency table for given interface:
1070 * @cliexstart{show ip6 neighbors GigabitEthernet2/0/0}
1071 * Time Address Flags Link layer Interface
1072 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
1073 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
1077 VLIB_CLI_COMMAND (show_ip6_neighbors_command, static) = {
1078 .path = "show ip6 neighbors",
1079 .function = show_ip6_neighbors,
1080 .short_help = "show ip6 neighbors [<interface>]",
1084 static clib_error_t *
1085 set_ip6_neighbor (vlib_main_t * vm,
1086 unformat_input_t * input, vlib_cli_command_t * cmd)
1088 vnet_main_t *vnm = vnet_get_main ();
1094 int is_no_fib_entry = 0;
1097 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1099 /* intfc, ip6-address, mac-address */
1100 if (unformat (input, "%U %U %U",
1101 unformat_vnet_sw_interface, vnm, &sw_if_index,
1102 unformat_ip6_address, &addr,
1103 unformat_ethernet_address, mac_address))
1106 else if (unformat (input, "delete") || unformat (input, "del"))
1108 else if (unformat (input, "static"))
1110 else if (unformat (input, "no-fib-entry"))
1111 is_no_fib_entry = 1;
1117 return clib_error_return (0, "Missing interface, ip6 or hw address");
1120 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
1121 mac_address, sizeof (mac_address),
1122 is_static, is_no_fib_entry);
1124 vnet_unset_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
1125 mac_address, sizeof (mac_address));
1130 * This command is used to manually add an entry to the IPv6 neighbor
1131 * adjacency table. Optionally, the entry can be added as static. It is
1132 * also used to remove an entry from the table. Use the '<em>show ip6
1133 * neighbors</em>' command to display all learned and manually entered entries.
1136 * Example of how to add a static entry to the IPv6 neighbor adjacency table:
1137 * @cliexcmd{set ip6 neighbor GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b static}
1138 * Example of how to delete an entry from the IPv6 neighbor adjacency table:
1139 * @cliexcmd{set ip6 neighbor del GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b}
1142 VLIB_CLI_COMMAND (set_ip6_neighbor_command, static) =
1144 .path = "set ip6 neighbor",
1145 .function = set_ip6_neighbor,
1146 .short_help = "set ip6 neighbor [del] <interface> <ip6-address> <mac-address> [static]",
1152 ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP,
1153 ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY,
1154 ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
1155 } icmp6_neighbor_solicitation_or_advertisement_next_t;
1157 static_always_inline uword
1158 icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
1159 vlib_node_runtime_t * node,
1160 vlib_frame_t * frame,
1161 uword is_solicitation)
1163 vnet_main_t *vnm = vnet_get_main ();
1164 ip6_main_t *im = &ip6_main;
1165 uword n_packets = frame->n_vectors;
1166 u32 *from, *to_next;
1167 u32 n_left_from, n_left_to_next, next_index, n_advertisements_sent;
1168 icmp6_neighbor_discovery_option_type_t option_type;
1169 vlib_node_runtime_t *error_node =
1170 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1173 from = vlib_frame_vector_args (frame);
1174 n_left_from = n_packets;
1175 next_index = node->cached_next_index;
1177 if (node->flags & VLIB_NODE_FLAG_TRACE)
1178 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1180 sizeof (icmp6_input_trace_t));
1184 ? ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address
1185 : ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address);
1186 n_advertisements_sent = 0;
1188 while (n_left_from > 0)
1190 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1192 while (n_left_from > 0 && n_left_to_next > 0)
1196 icmp6_neighbor_solicitation_or_advertisement_header_t *h0;
1197 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1198 u32 bi0, options_len0, sw_if_index0, next0, error0;
1199 u32 ip6_sadd_link_local, ip6_sadd_unspecified;
1203 bi0 = to_next[0] = from[0];
1208 n_left_to_next -= 1;
1210 p0 = vlib_get_buffer (vm, bi0);
1211 ip0 = vlib_buffer_get_current (p0);
1212 h0 = ip6_next_header (ip0);
1214 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1216 error0 = ICMP6_ERROR_NONE;
1217 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1218 ip6_sadd_link_local =
1219 ip6_address_is_link_local_unicast (&ip0->src_address);
1220 ip6_sadd_unspecified =
1221 ip6_address_is_unspecified (&ip0->src_address);
1223 /* Check that source address is unspecified, link-local or else on-link. */
1224 if (!ip6_sadd_unspecified && !ip6_sadd_link_local)
1226 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1228 if (ADJ_INDEX_INVALID != src_adj_index0)
1230 ip_adjacency_t *adj0 = adj_get (src_adj_index0);
1232 /* Allow all realistic-looking rewrite adjacencies to pass */
1233 ni0 = adj0->lookup_next_index;
1234 is_rewrite0 = (ni0 >= IP_LOOKUP_NEXT_ARP) &&
1235 (ni0 < IP6_LOOKUP_N_NEXT);
1237 error0 = ((adj0->rewrite_header.sw_if_index != sw_if_index0
1240 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK
1246 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK;
1250 o0 = (void *) (h0 + 1);
1251 o0 = ((options_len0 == 8 && o0->header.type == option_type
1252 && o0->header.n_data_u64s == 1) ? o0 : 0);
1254 /* If src address unspecified or link local, donot learn neighbor MAC */
1255 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1256 !ip6_sadd_unspecified))
1258 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1261 &h0->target_address,
1262 o0->ethernet_address,
1263 sizeof (o0->ethernet_address),
1267 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1269 /* Check that target address is local to this router. */
1270 fib_node_index_t fei;
1274 ip6_fib_table_get_index_for_sw_if_index (sw_if_index0);
1276 if (~0 == fib_index)
1278 error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1282 if (ip6_address_is_link_local_unicast (&h0->target_address))
1284 fei = ip6_fib_table_lookup_exact_match
1285 (ip6_ll_fib_get (sw_if_index0),
1286 &h0->target_address, 128);
1290 fei = ip6_fib_table_lookup_exact_match (fib_index,
1291 &h0->target_address,
1295 if (FIB_NODE_INDEX_INVALID == fei)
1297 /* The target address is not in the FIB */
1299 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1303 if (FIB_ENTRY_FLAG_LOCAL &
1304 fib_entry_get_flags_for_source (fei,
1305 FIB_SOURCE_INTERFACE))
1307 /* It's an address that belongs to one of our interfaces
1311 if (fib_entry_is_sourced
1312 (fei, FIB_SOURCE_IP6_ND_PROXY) ||
1313 fib_entry_is_sourced (fei, FIB_SOURCE_IP6_ND))
1315 /* The address was added by IPv6 Proxy ND config.
1316 * We should only respond to these if the NS arrived on
1317 * the link that has a matching covering prefix */
1322 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1328 if (is_solicitation)
1329 next0 = (error0 != ICMP6_ERROR_NONE
1330 ? ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP
1331 : ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY);
1335 error0 = error0 == ICMP6_ERROR_NONE ?
1336 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_RX : error0;
1339 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1341 vnet_sw_interface_t *sw_if0;
1342 ethernet_interface_t *eth_if0;
1343 ethernet_header_t *eth0;
1345 /* dst address is either source address or the all-nodes mcast addr */
1346 if (!ip6_sadd_unspecified)
1347 ip0->dst_address = ip0->src_address;
1349 ip6_set_reserved_multicast_address (&ip0->dst_address,
1350 IP6_MULTICAST_SCOPE_link_local,
1351 IP6_MULTICAST_GROUP_ID_all_hosts);
1353 ip0->src_address = h0->target_address;
1354 ip0->hop_limit = 255;
1355 h0->icmp.type = ICMP6_neighbor_advertisement;
1357 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1358 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1360 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1363 clib_memcpy (o0->ethernet_address, eth_if0->address, 6);
1365 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
1368 h0->advertisement_flags = clib_host_to_net_u32
1369 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED
1370 | ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
1372 h0->icmp.checksum = 0;
1374 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1376 ASSERT (bogus_length == 0);
1378 /* Reuse current MAC header, copy SMAC to DMAC and
1379 * interface MAC to SMAC */
1380 vlib_buffer_advance (p0, -ethernet_buffer_header_size (p0));
1381 eth0 = vlib_buffer_get_current (p0);
1382 clib_memcpy (eth0->dst_address, eth0->src_address, 6);
1384 clib_memcpy (eth0->src_address, eth_if0->address, 6);
1386 /* Setup input and output sw_if_index for packet */
1387 ASSERT (vnet_buffer (p0)->sw_if_index[VLIB_RX] == sw_if_index0);
1388 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1389 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1390 vnet_main.local_interface_sw_if_index;
1392 n_advertisements_sent++;
1395 p0->error = error_node->errors[error0];
1397 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1398 to_next, n_left_to_next,
1402 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1405 /* Account for advertisements sent. */
1406 vlib_error_count (vm, error_node->node_index,
1407 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX,
1408 n_advertisements_sent);
1410 return frame->n_vectors;
1413 /* for "syslogging" - use elog for now */
1414 #define foreach_log_level \
1415 _ (DEBUG, "DEBUG") \
1416 _ (INFO, "INFORMATION") \
1417 _ (NOTICE, "NOTICE") \
1418 _ (WARNING, "WARNING") \
1420 _ (CRIT, "CRITICAL") \
1421 _ (ALERT, "ALERT") \
1422 _ (EMERG, "EMERGENCY")
1426 #define _(f,s) LOG_##f,
1431 static char *log_level_strings[] = {
1437 static int logmask = 1 << LOG_DEBUG;
1440 ip6_neighbor_syslog (vlib_main_t * vm, int priority, char *fmt, ...)
1442 /* just use elog for now */
1446 if ((priority > LOG_EMERG) || !(logmask & (1 << priority)))
1452 what = va_format (0, fmt, &va);
1454 ELOG_TYPE_DECLARE (e) =
1456 .format = "ip6 nd: (%s): %s",.format_args = "T4T4",};
1461 ed = ELOG_DATA (&vm->elog_main, e);
1462 ed->s[0] = elog_string (&vm->elog_main, log_level_strings[priority]);
1463 ed->s[1] = elog_string (&vm->elog_main, (char *) what);
1470 call_ip6_neighbor_callbacks (void *data,
1471 _vnet_ip6_neighbor_function_list_elt_t * elt)
1473 clib_error_t *error = 0;
1477 error = elt->fp (data);
1480 elt = elt->next_ip6_neighbor_function;
1486 /* ipv6 neighbor discovery - router advertisements */
1489 ICMP6_ROUTER_SOLICITATION_NEXT_DROP,
1490 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW,
1491 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX,
1492 ICMP6_ROUTER_SOLICITATION_N_NEXT,
1493 } icmp6_router_solicitation_or_advertisement_next_t;
1495 static_always_inline uword
1496 icmp6_router_solicitation (vlib_main_t * vm,
1497 vlib_node_runtime_t * node, vlib_frame_t * frame)
1499 vnet_main_t *vnm = vnet_get_main ();
1500 ip6_main_t *im = &ip6_main;
1501 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1502 uword n_packets = frame->n_vectors;
1503 u32 *from, *to_next;
1504 u32 n_left_from, n_left_to_next, next_index;
1505 u32 n_advertisements_sent = 0;
1508 icmp6_neighbor_discovery_option_type_t option_type;
1510 vlib_node_runtime_t *error_node =
1511 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1513 from = vlib_frame_vector_args (frame);
1514 n_left_from = n_packets;
1515 next_index = node->cached_next_index;
1517 if (node->flags & VLIB_NODE_FLAG_TRACE)
1518 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1520 sizeof (icmp6_input_trace_t));
1522 /* source may append his LL address */
1523 option_type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1525 while (n_left_from > 0)
1527 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1529 while (n_left_from > 0 && n_left_to_next > 0)
1533 ip6_radv_t *radv_info = 0;
1535 icmp6_neighbor_discovery_header_t *h0;
1536 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1538 u32 bi0, options_len0, sw_if_index0, next0, error0;
1539 u32 is_solicitation = 1, is_dropped = 0;
1540 u32 is_unspecified, is_link_local;
1542 bi0 = to_next[0] = from[0];
1547 n_left_to_next -= 1;
1549 p0 = vlib_get_buffer (vm, bi0);
1550 ip0 = vlib_buffer_get_current (p0);
1551 h0 = ip6_next_header (ip0);
1553 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1554 is_unspecified = ip6_address_is_unspecified (&ip0->src_address);
1556 ip6_address_is_link_local_unicast (&ip0->src_address);
1558 error0 = ICMP6_ERROR_NONE;
1559 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1561 /* check if solicitation (not from nd_timer node) */
1562 if (ip6_address_is_unspecified (&ip0->dst_address))
1563 is_solicitation = 0;
1565 /* Check that source address is unspecified, link-local or else on-link. */
1566 if (!is_unspecified && !is_link_local)
1568 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1570 if (ADJ_INDEX_INVALID != src_adj_index0)
1572 ip_adjacency_t *adj0 = adj_get (src_adj_index0);
1574 error0 = (adj0->rewrite_header.sw_if_index != sw_if_index0
1576 ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK
1581 error0 = ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK;
1585 /* check for source LL option and process */
1586 o0 = (void *) (h0 + 1);
1587 o0 = ((options_len0 == 8
1588 && o0->header.type == option_type
1589 && o0->header.n_data_u64s == 1) ? o0 : 0);
1591 /* if src address unspecified IGNORE any options */
1592 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1593 !is_unspecified && !is_link_local))
1595 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1597 o0->ethernet_address,
1598 sizeof (o0->ethernet_address),
1602 /* default is to drop */
1603 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1605 if (error0 == ICMP6_ERROR_NONE)
1607 vnet_sw_interface_t *sw_if0;
1608 ethernet_interface_t *eth_if0;
1611 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1612 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1614 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1616 /* only support ethernet interface type for now */
1618 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1621 if (error0 == ICMP6_ERROR_NONE)
1625 /* adjust the sizeof the buffer to just include the ipv6 header */
1626 p0->current_length -=
1628 sizeof (icmp6_neighbor_discovery_header_t));
1630 /* look up the radv_t information for this interface */
1631 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) >
1635 nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1638 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1643 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1646 if (error0 == ICMP6_ERROR_NONE)
1648 f64 now = vlib_time_now (vm);
1650 /* for solicited adverts - need to rate limit */
1651 if (is_solicitation)
1653 if (0 != radv_info->last_radv_time &&
1654 (now - radv_info->last_radv_time) <
1655 MIN_DELAY_BETWEEN_RAS)
1658 radv_info->last_radv_time = now;
1662 icmp6_router_advertisement_header_t rh;
1664 rh.icmp.type = ICMP6_router_advertisement;
1666 rh.icmp.checksum = 0;
1668 rh.current_hop_limit = radv_info->curr_hop_limit;
1669 rh.router_lifetime_in_sec =
1670 clib_host_to_net_u16
1671 (radv_info->adv_router_lifetime_in_sec);
1673 time_in_msec_between_retransmitted_neighbor_solicitations
1675 clib_host_to_net_u32 (radv_info->
1676 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
1677 rh.neighbor_reachable_time_in_msec =
1678 clib_host_to_net_u32 (radv_info->
1679 adv_neighbor_reachable_time_in_msec);
1682 (radv_info->adv_managed_flag) ?
1683 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP :
1686 ((radv_info->adv_other_flag) ?
1687 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP :
1691 u16 payload_length =
1692 sizeof (icmp6_router_advertisement_header_t);
1694 vlib_buffer_add_data (vm,
1695 vlib_buffer_get_free_list_index
1696 (p0), bi0, (void *) &rh,
1698 (icmp6_router_advertisement_header_t));
1700 if (radv_info->adv_link_layer_address)
1702 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
1706 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1707 h.header.n_data_u64s = 1;
1709 /* copy ll address */
1710 clib_memcpy (&h.ethernet_address[0],
1711 eth_if0->address, 6);
1713 vlib_buffer_add_data (vm,
1714 vlib_buffer_get_free_list_index
1715 (p0), bi0, (void *) &h,
1717 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t));
1721 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t);
1724 /* add MTU option */
1725 if (radv_info->adv_link_mtu)
1727 icmp6_neighbor_discovery_mtu_option_t h;
1731 clib_host_to_net_u32 (radv_info->adv_link_mtu);
1732 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu;
1733 h.header.n_data_u64s = 1;
1736 sizeof (icmp6_neighbor_discovery_mtu_option_t);
1738 vlib_buffer_add_data (vm,
1739 vlib_buffer_get_free_list_index
1740 (p0), bi0, (void *) &h,
1742 (icmp6_neighbor_discovery_mtu_option_t));
1745 /* add advertised prefix options */
1746 ip6_radv_prefix_t *pr_info;
1749 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
1751 if(pr_info->enabled &&
1752 (!pr_info->decrement_lifetime_flag
1753 || (pr_info->pref_lifetime_expires >0)))
1755 /* advertise this prefix */
1756 icmp6_neighbor_discovery_prefix_information_option_t h;
1758 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information;
1759 h.header.n_data_u64s = (sizeof(icmp6_neighbor_discovery_prefix_information_option_t) >> 3);
1761 h.dst_address_length = pr_info->prefix_len;
1763 h.flags = (pr_info->adv_on_link_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_FLAG_ON_LINK : 0;
1764 h.flags |= (pr_info->adv_autonomous_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_AUTO : 0;
1766 if(radv_info->cease_radv && pr_info->deprecated_prefix_flag)
1768 h.valid_time = clib_host_to_net_u32(MIN_ADV_VALID_LIFETIME);
1769 h.preferred_time = 0;
1773 if(pr_info->decrement_lifetime_flag)
1775 pr_info->adv_valid_lifetime_in_secs = ((pr_info->valid_lifetime_expires > now)) ?
1776 (pr_info->valid_lifetime_expires - now) : 0;
1778 pr_info->adv_pref_lifetime_in_secs = ((pr_info->pref_lifetime_expires > now)) ?
1779 (pr_info->pref_lifetime_expires - now) : 0;
1782 h.valid_time = clib_host_to_net_u32(pr_info->adv_valid_lifetime_in_secs);
1783 h.preferred_time = clib_host_to_net_u32(pr_info->adv_pref_lifetime_in_secs) ;
1787 clib_memcpy(&h.dst_address, &pr_info->prefix, sizeof(ip6_address_t));
1789 payload_length += sizeof( icmp6_neighbor_discovery_prefix_information_option_t);
1791 vlib_buffer_add_data (vm,
1792 vlib_buffer_get_free_list_index (p0),
1794 (void *)&h, sizeof(icmp6_neighbor_discovery_prefix_information_option_t));
1800 /* add additional options before here */
1802 /* finish building the router advertisement... */
1803 if (!is_unspecified && radv_info->send_unicast)
1805 ip0->dst_address = ip0->src_address;
1809 /* target address is all-nodes mcast addr */
1810 ip6_set_reserved_multicast_address
1812 IP6_MULTICAST_SCOPE_link_local,
1813 IP6_MULTICAST_GROUP_ID_all_hosts);
1816 /* source address MUST be the link-local address */
1817 ip0->src_address = radv_info->link_local_address;
1819 ip0->hop_limit = 255;
1820 ip0->payload_length =
1821 clib_host_to_net_u16 (payload_length);
1823 icmp6_router_advertisement_header_t *rh0 =
1824 (icmp6_router_advertisement_header_t *) (ip0 + 1);
1825 rh0->icmp.checksum =
1826 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1828 ASSERT (bogus_length == 0);
1830 /* setup output if and adjacency */
1831 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1832 vnet_main.local_interface_sw_if_index;
1834 if (is_solicitation)
1836 ethernet_header_t *eth0;
1837 /* Reuse current MAC header, copy SMAC to DMAC and
1838 * interface MAC to SMAC */
1839 vlib_buffer_reset (p0);
1840 eth0 = vlib_buffer_get_current (p0);
1841 clib_memcpy (eth0->dst_address, eth0->src_address,
1843 clib_memcpy (eth0->src_address, eth_if0->address,
1846 is_dropped ? next0 :
1847 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX;
1848 vnet_buffer (p0)->sw_if_index[VLIB_TX] =
1853 adj_index0 = radv_info->mcast_adj_index;
1854 if (adj_index0 == 0)
1855 error0 = ICMP6_ERROR_DST_LOOKUP_MISS;
1859 is_dropped ? next0 :
1860 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW;
1861 vnet_buffer (p0)->ip.adj_index[VLIB_TX] =
1865 p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
1867 radv_info->n_solicitations_dropped += is_dropped;
1868 radv_info->n_solicitations_rcvd += is_solicitation;
1870 if ((error0 == ICMP6_ERROR_NONE) && !is_dropped)
1872 radv_info->n_advertisements_sent++;
1873 n_advertisements_sent++;
1879 p0->error = error_node->errors[error0];
1881 if (error0 != ICMP6_ERROR_NONE)
1882 vlib_error_count (vm, error_node->node_index, error0, 1);
1884 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1885 to_next, n_left_to_next,
1890 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1893 /* Account for router advertisements sent. */
1894 vlib_error_count (vm, error_node->node_index,
1895 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_TX,
1896 n_advertisements_sent);
1898 return frame->n_vectors;
1901 /* validate advertised info for consistancy (see RFC-4861 section 6.2.7) - log any inconsistencies, packet will always be dropped */
1902 static_always_inline uword
1903 icmp6_router_advertisement (vlib_main_t * vm,
1904 vlib_node_runtime_t * node, vlib_frame_t * frame)
1906 vnet_main_t *vnm = vnet_get_main ();
1907 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1908 uword n_packets = frame->n_vectors;
1909 u32 *from, *to_next;
1910 u32 n_left_from, n_left_to_next, next_index;
1911 u32 n_advertisements_rcvd = 0;
1913 vlib_node_runtime_t *error_node =
1914 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1916 from = vlib_frame_vector_args (frame);
1917 n_left_from = n_packets;
1918 next_index = node->cached_next_index;
1920 if (node->flags & VLIB_NODE_FLAG_TRACE)
1921 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1923 sizeof (icmp6_input_trace_t));
1925 while (n_left_from > 0)
1927 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1929 while (n_left_from > 0 && n_left_to_next > 0)
1933 ip6_radv_t *radv_info = 0;
1934 icmp6_router_advertisement_header_t *h0;
1935 u32 bi0, options_len0, sw_if_index0, next0, error0;
1937 bi0 = to_next[0] = from[0];
1942 n_left_to_next -= 1;
1944 p0 = vlib_get_buffer (vm, bi0);
1945 ip0 = vlib_buffer_get_current (p0);
1946 h0 = ip6_next_header (ip0);
1948 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1950 error0 = ICMP6_ERROR_NONE;
1951 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1953 /* Check that source address is link-local */
1954 error0 = (!ip6_address_is_link_local_unicast (&ip0->src_address)) ?
1955 ICMP6_ERROR_ROUTER_ADVERTISEMENT_SOURCE_NOT_LINK_LOCAL : error0;
1957 /* default is to drop */
1958 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1960 n_advertisements_rcvd++;
1962 if (error0 == ICMP6_ERROR_NONE)
1964 vnet_sw_interface_t *sw_if0;
1965 ethernet_interface_t *eth_if0;
1967 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1968 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1970 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1972 /* only support ethernet interface type for now */
1974 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1977 if (error0 == ICMP6_ERROR_NONE)
1981 /* look up the radv_t information for this interface */
1982 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) >
1986 nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1989 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1994 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1997 if (error0 == ICMP6_ERROR_NONE)
1999 radv_info->keep_sending_rs = 0;
2003 r.sw_if_index = sw_if_index0;
2004 memcpy (r.router_address, &ip0->src_address, 16);
2005 r.current_hop_limit = h0->current_hop_limit;
2006 r.flags = h0->flags;
2007 r.router_lifetime_in_sec =
2008 clib_net_to_host_u16 (h0->router_lifetime_in_sec);
2009 r.neighbor_reachable_time_in_msec =
2010 clib_net_to_host_u32
2011 (h0->neighbor_reachable_time_in_msec);
2012 r.time_in_msec_between_retransmitted_neighbor_solicitations = clib_net_to_host_u32 (h0->time_in_msec_between_retransmitted_neighbor_solicitations);
2015 /* validate advertised information */
2016 if ((h0->current_hop_limit && radv_info->curr_hop_limit)
2017 && (h0->current_hop_limit !=
2018 radv_info->curr_hop_limit))
2020 ip6_neighbor_syslog (vm, LOG_WARNING,
2021 "our AdvCurHopLimit on %U doesn't agree with %U",
2022 format_vnet_sw_if_index_name,
2029 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP)
2030 != radv_info->adv_managed_flag)
2032 ip6_neighbor_syslog (vm, LOG_WARNING,
2033 "our AdvManagedFlag on %U doesn't agree with %U",
2034 format_vnet_sw_if_index_name,
2041 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP)
2042 != radv_info->adv_other_flag)
2044 ip6_neighbor_syslog (vm, LOG_WARNING,
2045 "our AdvOtherConfigFlag on %U doesn't agree with %U",
2046 format_vnet_sw_if_index_name,
2053 time_in_msec_between_retransmitted_neighbor_solicitations
2055 adv_time_in_msec_between_retransmitted_neighbor_solicitations)
2057 time_in_msec_between_retransmitted_neighbor_solicitations
2059 clib_host_to_net_u32 (radv_info->
2060 adv_time_in_msec_between_retransmitted_neighbor_solicitations)))
2062 ip6_neighbor_syslog (vm, LOG_WARNING,
2063 "our AdvRetransTimer on %U doesn't agree with %U",
2064 format_vnet_sw_if_index_name,
2070 if ((h0->neighbor_reachable_time_in_msec &&
2071 radv_info->adv_neighbor_reachable_time_in_msec) &&
2072 (h0->neighbor_reachable_time_in_msec !=
2073 clib_host_to_net_u32
2074 (radv_info->adv_neighbor_reachable_time_in_msec)))
2076 ip6_neighbor_syslog (vm, LOG_WARNING,
2077 "our AdvReachableTime on %U doesn't agree with %U",
2078 format_vnet_sw_if_index_name,
2084 /* check for MTU or prefix options or .. */
2085 u8 *opt_hdr = (u8 *) (h0 + 1);
2086 while (options_len0 > 0)
2088 icmp6_neighbor_discovery_option_header_t *o0 =
2089 (icmp6_neighbor_discovery_option_header_t *)
2091 int opt_len = o0->n_data_u64s << 3;
2092 icmp6_neighbor_discovery_option_type_t option_type =
2095 if (options_len0 < 2)
2097 ip6_neighbor_syslog (vm, LOG_ERR,
2098 "malformed RA packet on %U from %U",
2099 format_vnet_sw_if_index_name,
2108 ip6_neighbor_syslog (vm, LOG_ERR,
2109 " zero length option in RA on %U from %U",
2110 format_vnet_sw_if_index_name,
2116 else if (opt_len > options_len0)
2118 ip6_neighbor_syslog (vm, LOG_ERR,
2119 "option length in RA packet greater than total length on %U from %U",
2120 format_vnet_sw_if_index_name,
2127 options_len0 -= opt_len;
2130 switch (option_type)
2132 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address:
2134 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
2136 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
2139 if (opt_len < sizeof (*h))
2142 memcpy (r.slla, h->ethernet_address, 6);
2146 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu:
2148 icmp6_neighbor_discovery_mtu_option_t *h =
2149 (icmp6_neighbor_discovery_mtu_option_t
2152 if (opt_len < sizeof (*h))
2155 r.mtu = clib_net_to_host_u32 (h->mtu);
2157 if ((h->mtu && radv_info->adv_link_mtu) &&
2159 clib_host_to_net_u32
2160 (radv_info->adv_link_mtu)))
2162 ip6_neighbor_syslog (vm, LOG_WARNING,
2163 "our AdvLinkMTU on %U doesn't agree with %U",
2164 format_vnet_sw_if_index_name,
2172 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information:
2174 icmp6_neighbor_discovery_prefix_information_option_t
2176 (icmp6_neighbor_discovery_prefix_information_option_t
2179 /* validate advertised prefix options */
2180 ip6_radv_prefix_t *pr_info;
2181 u32 preferred, valid;
2183 if (opt_len < sizeof (*h))
2186 vec_validate (r.prefixes,
2187 vec_len (r.prefixes));
2188 ra_report_prefix_info_t *prefix =
2189 vec_elt_at_index (r.prefixes,
2190 vec_len (r.prefixes) - 1);
2193 clib_net_to_host_u32 (h->preferred_time);
2194 valid = clib_net_to_host_u32 (h->valid_time);
2196 prefix->preferred_time = preferred;
2197 prefix->valid_time = valid;
2198 prefix->flags = h->flags & 0xc0;
2199 prefix->dst_address_length =
2200 h->dst_address_length;
2201 prefix->dst_address = h->dst_address;
2203 /* look for matching prefix - if we our advertising it, it better be consistant */
2205 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
2209 ip6_address_mask_from_width(&mask, pr_info->prefix_len);
2211 if(pr_info->enabled &&
2212 (pr_info->prefix_len == h->dst_address_length) &&
2213 ip6_address_is_equal_masked (&pr_info->prefix, &h->dst_address, &mask))
2216 if(!pr_info->decrement_lifetime_flag &&
2217 valid != pr_info->adv_valid_lifetime_in_secs)
2219 ip6_neighbor_syslog(vm, LOG_WARNING,
2220 "our ADV validlifetime on %U for %U does not agree with %U",
2221 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
2222 format_ip6_address, &h->dst_address);
2224 if(!pr_info->decrement_lifetime_flag &&
2225 preferred != pr_info->adv_pref_lifetime_in_secs)
2227 ip6_neighbor_syslog(vm, LOG_WARNING,
2228 "our ADV preferredlifetime on %U for %U does not agree with %U",
2229 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
2230 format_ip6_address, &h->dst_address);
2248 p0->error = error_node->errors[error0];
2250 if (error0 != ICMP6_ERROR_NONE)
2251 vlib_error_count (vm, error_node->node_index, error0, 1);
2253 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
2254 to_next, n_left_to_next,
2258 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2261 /* Account for router advertisements received. */
2262 vlib_error_count (vm, error_node->node_index,
2263 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_RX,
2264 n_advertisements_rcvd);
2266 return frame->n_vectors;
2270 random_f64_from_to (f64 from, f64 to)
2272 static u32 seed = 0;
2273 static u8 seed_set = 0;
2276 seed = random_default_seed ();
2279 return random_f64 (&seed) * (to - from) + from;
2283 get_mac_address (u32 sw_if_index, u8 * address)
2285 vnet_main_t *vnm = vnet_get_main ();
2286 vnet_hw_interface_t *hw_if = vnet_get_sup_hw_interface (vnm, sw_if_index);
2287 if (!hw_if->hw_address)
2289 clib_memcpy (address, hw_if->hw_address, 6);
2293 static inline vlib_buffer_t *
2294 create_buffer_for_rs (vlib_main_t * vm, ip6_radv_t * radv_info)
2298 vlib_buffer_free_list_t *fl;
2299 icmp6_router_solicitation_header_t *rh;
2304 sw_if_index = radv_info->sw_if_index;
2306 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
2308 clib_warning ("buffer allocation failure");
2312 p0 = vlib_get_buffer (vm, bi0);
2313 fl = vlib_buffer_get_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2314 vlib_buffer_init_for_free_list (p0, fl);
2315 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (p0);
2316 p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
2318 vnet_buffer (p0)->sw_if_index[VLIB_RX] = sw_if_index;
2319 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index;
2321 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
2323 rh = vlib_buffer_get_current (p0);
2324 p0->current_length = sizeof (*rh);
2326 rh->neighbor.icmp.type = ICMP6_router_solicitation;
2327 rh->neighbor.icmp.code = 0;
2328 rh->neighbor.icmp.checksum = 0;
2329 rh->neighbor.reserved_must_be_zero = 0;
2331 rh->link_layer_option.header.type =
2332 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
2333 if (0 != get_mac_address (sw_if_index,
2334 rh->link_layer_option.ethernet_address))
2336 clib_warning ("interface with sw_if_index %u has no mac address",
2338 vlib_buffer_free (vm, &bi0, 1);
2341 rh->link_layer_option.header.n_data_u64s = 1;
2343 payload_length = sizeof (rh->neighbor) + sizeof (u64);
2345 rh->ip.ip_version_traffic_class_and_flow_label =
2346 clib_host_to_net_u32 (0x6 << 28);
2347 rh->ip.payload_length = clib_host_to_net_u16 (payload_length);
2348 rh->ip.protocol = IP_PROTOCOL_ICMP6;
2349 rh->ip.hop_limit = 255;
2350 rh->ip.src_address = radv_info->link_local_address;
2351 /* set address ff02::2 */
2352 rh->ip.dst_address.as_u64[0] = clib_host_to_net_u64 (0xff02L << 48);
2353 rh->ip.dst_address.as_u64[1] = clib_host_to_net_u64 (2);
2355 rh->neighbor.icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, p0,
2363 stop_sending_rs (vlib_main_t * vm, ip6_radv_t * ra)
2367 ra->keep_sending_rs = 0;
2370 bi0 = vlib_get_buffer_index (vm, ra->buffer);
2371 vlib_buffer_free (vm, &bi0, 1);
2377 check_send_rs (vlib_main_t * vm, ip6_radv_t * radv_info, f64 current_time,
2387 icmp6_send_router_solicitation_params_t *params;
2389 if (!radv_info->keep_sending_rs)
2392 params = &radv_info->params;
2394 if (radv_info->due_time > current_time)
2396 *due_time = radv_info->due_time;
2400 p0 = radv_info->buffer;
2402 next_index = ip6_rewrite_mcast_node.index;
2404 c0 = vlib_buffer_copy (vm, p0);
2405 ci0 = vlib_get_buffer_index (vm, c0);
2407 f = vlib_get_frame_to_node (vm, next_index);
2408 to_next = vlib_frame_vector_args (f);
2411 vlib_put_frame_to_node (vm, next_index, f);
2413 if (params->mrc != 0 && --radv_info->n_left == 0)
2414 stop_sending_rs (vm, radv_info);
2417 radv_info->sleep_interval =
2418 (2 + random_f64_from_to (-0.1, 0.1)) * radv_info->sleep_interval;
2419 if (radv_info->sleep_interval > params->mrt)
2420 radv_info->sleep_interval =
2421 (1 + random_f64_from_to (-0.1, 0.1)) * params->mrt;
2423 radv_info->due_time = current_time + radv_info->sleep_interval;
2425 if (params->mrd != 0
2426 && current_time > radv_info->start_time + params->mrd)
2427 stop_sending_rs (vm, radv_info);
2429 *due_time = radv_info->due_time;
2432 return radv_info->keep_sending_rs;
2436 send_rs_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
2439 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2440 ip6_radv_t *radv_info;
2441 uword *event_data = 0;
2442 f64 sleep_time = 1e9;
2449 vlib_process_wait_for_event_or_clock (vm, sleep_time);
2450 vlib_process_get_events (vm, &event_data);
2451 vec_reset_length (event_data);
2453 current_time = vlib_time_now (vm);
2456 due_time = current_time + 1e9;
2458 pool_foreach (radv_info, nm->if_radv_pool,
2460 if (check_send_rs (vm, radv_info, current_time, &dt)
2465 current_time = vlib_time_now (vm);
2467 while (due_time < current_time);
2469 sleep_time = due_time - current_time;
2476 VLIB_REGISTER_NODE (send_rs_process_node) = {
2477 .function = send_rs_process,
2478 .type = VLIB_NODE_TYPE_PROCESS,
2479 .name = "send-rs-process",
2484 icmp6_send_router_solicitation (vlib_main_t * vm, u32 sw_if_index, u8 stop,
2485 icmp6_send_router_solicitation_params_t *
2488 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2492 ASSERT (~0 != sw_if_index);
2494 rai = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2495 ra = pool_elt_at_index (nm->if_radv_pool, rai);
2497 stop_sending_rs (vm, ra);
2501 ra->keep_sending_rs = 1;
2502 ra->params = *params;
2503 ra->n_left = params->mrc;
2504 ra->start_time = vlib_time_now (vm);
2505 ra->sleep_interval = (1 + random_f64_from_to (-0.1, 0.1)) * params->irt;
2506 ra->due_time = 0; /* send first packet ASAP */
2507 ra->buffer = create_buffer_for_rs (vm, ra);
2509 ra->keep_sending_rs = 0;
2511 vlib_process_signal_event (vm, send_rs_process_node.index, 1, 0);
2516 * @brief Add a multicast Address to the advertised MLD set
2519 ip6_neighbor_add_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2521 ip6_mldp_group_t *mcast_group_info;
2524 /* lookup mldp info for this interface */
2525 p = mhash_get (&radv_info->address_to_mldp_index, addr);
2527 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2530 if (!mcast_group_info)
2534 pool_get (radv_info->mldp_group_pool, mcast_group_info);
2536 mi = mcast_group_info - radv_info->mldp_group_pool;
2537 mhash_set (&radv_info->address_to_mldp_index, addr, mi, /* old_value */
2540 mcast_group_info->type = 4;
2541 mcast_group_info->mcast_source_address_pool = 0;
2542 mcast_group_info->num_sources = 0;
2543 clib_memcpy (&mcast_group_info->mcast_address, addr,
2544 sizeof (ip6_address_t));
2549 * @brief Delete a multicast Address from the advertised MLD set
2552 ip6_neighbor_del_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2554 ip6_mldp_group_t *mcast_group_info;
2557 p = mhash_get (&radv_info->address_to_mldp_index, &addr);
2559 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2561 if (mcast_group_info)
2563 mhash_unset (&radv_info->address_to_mldp_index, &addr,
2565 pool_put (radv_info->mldp_group_pool, mcast_group_info);
2570 * @brief Add a multicast Address to the advertised MLD set
2573 ip6_neighbor_add_mld_grp (ip6_radv_t * a,
2574 ip6_multicast_address_scope_t scope,
2575 ip6_multicast_link_local_group_id_t group)
2579 ip6_set_reserved_multicast_address (&addr, scope, group);
2581 ip6_neighbor_add_mld_prefix (a, &addr);
2585 * @brief create and initialize router advertisement parameters with default
2586 * values for this intfc
2589 ip6_neighbor_sw_interface_add_del (vnet_main_t * vnm,
2590 u32 sw_if_index, u32 is_add)
2592 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2595 vnet_sw_interface_t *sw_if0;
2596 ethernet_interface_t *eth_if0 = 0;
2598 /* lookup radv container - ethernet interfaces only */
2599 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2600 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2601 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2606 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2608 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2612 a = pool_elt_at_index (nm->if_radv_pool, ri);
2616 ip6_radv_prefix_t *p;
2617 ip6_mldp_group_t *m;
2619 /* release the lock on the interface's mcast adj */
2620 adj_unlock (a->mcast_adj_index);
2622 /* clean up prefix and MDP pools */
2624 pool_flush(p, a->adv_prefixes_pool,
2626 mhash_unset (&a->address_to_prefix_index, &p->prefix, 0);
2628 pool_flush (m, a->mldp_group_pool,
2630 mhash_unset (&a->address_to_mldp_index, &m->mcast_address, 0);
2634 pool_free (a->mldp_group_pool);
2635 pool_free (a->adv_prefixes_pool);
2637 mhash_free (&a->address_to_prefix_index);
2638 mhash_free (&a->address_to_mldp_index);
2640 if (a->keep_sending_rs)
2641 a->keep_sending_rs = 0;
2643 pool_put (nm->if_radv_pool, a);
2644 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ~0;
2652 pool_get (nm->if_radv_pool, a);
2654 ri = a - nm->if_radv_pool;
2655 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ri;
2657 /* initialize default values (most of which are zero) */
2658 memset (a, 0, sizeof (a[0]));
2660 a->sw_if_index = sw_if_index;
2661 a->max_radv_interval = DEF_MAX_RADV_INTERVAL;
2662 a->min_radv_interval = DEF_MIN_RADV_INTERVAL;
2663 a->curr_hop_limit = DEF_CURR_HOP_LIMIT;
2664 a->adv_router_lifetime_in_sec = DEF_DEF_RTR_LIFETIME;
2666 /* send ll address source address option */
2667 a->adv_link_layer_address = 1;
2669 a->min_delay_between_radv = MIN_DELAY_BETWEEN_RAS;
2670 a->max_delay_between_radv = MAX_DELAY_BETWEEN_RAS;
2671 a->max_rtr_default_lifetime = MAX_DEF_RTR_LIFETIME;
2672 a->seed = (u32) clib_cpu_time_now ();
2673 (void) random_u32 (&a->seed);
2674 a->randomizer = clib_cpu_time_now ();
2675 (void) random_u64 (&a->randomizer);
2677 a->initial_adverts_count = MAX_INITIAL_RTR_ADVERTISEMENTS;
2678 a->initial_adverts_sent = a->initial_adverts_count - 1;
2679 a->initial_adverts_interval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
2681 /* deafult is to send */
2684 /* fill in radv_info for this interface that will be needed later */
2686 vnet_sw_interface_get_mtu (vnm, sw_if_index, VNET_MTU_IP6);
2688 clib_memcpy (a->link_layer_address, eth_if0->address, 6);
2690 /* fill in default link-local address (this may be overridden) */
2691 ip6_link_local_address_from_ethernet_address
2692 (&a->link_local_address, eth_if0->address);
2694 mhash_init (&a->address_to_prefix_index, sizeof (uword),
2695 sizeof (ip6_address_t));
2696 mhash_init (&a->address_to_mldp_index, sizeof (uword),
2697 sizeof (ip6_address_t));
2699 a->mcast_adj_index = adj_mcast_add_or_lock (FIB_PROTOCOL_IP6,
2703 a->keep_sending_rs = 0;
2705 /* add multicast groups we will always be reporting */
2706 ip6_neighbor_add_mld_grp (a,
2707 IP6_MULTICAST_SCOPE_link_local,
2708 IP6_MULTICAST_GROUP_ID_all_hosts);
2709 ip6_neighbor_add_mld_grp (a,
2710 IP6_MULTICAST_SCOPE_link_local,
2711 IP6_MULTICAST_GROUP_ID_all_routers);
2712 ip6_neighbor_add_mld_grp (a,
2713 IP6_MULTICAST_SCOPE_link_local,
2714 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2720 /* send an mldpv2 report */
2722 ip6_neighbor_send_mldpv2_report (u32 sw_if_index)
2724 vnet_main_t *vnm = vnet_get_main ();
2725 vlib_main_t *vm = vnm->vlib_main;
2726 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2727 vnet_sw_interface_t *sw_if0;
2728 ethernet_interface_t *eth_if0;
2732 ip6_radv_t *radv_info;
2742 icmp6_multicast_listener_report_header_t *rh0;
2743 icmp6_multicast_listener_report_packet_t *rp0;
2745 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2746 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
2747 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2749 if (!eth_if0 || !vnet_sw_interface_is_admin_up (vnm, sw_if_index))
2752 /* look up the radv_t information for this interface */
2753 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2756 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2761 /* send report now - build a mldpv2 report packet */
2762 n_allocated = vlib_buffer_alloc_from_free_list (vm,
2765 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2766 if (PREDICT_FALSE (n_allocated == 0))
2768 clib_warning ("buffer allocation failure");
2772 b0 = vlib_get_buffer (vm, bo0);
2774 /* adjust the sizeof the buffer to just include the ipv6 header */
2775 b0->current_length = sizeof (icmp6_multicast_listener_report_packet_t);
2777 payload_length = sizeof (icmp6_multicast_listener_report_header_t);
2779 b0->error = ICMP6_ERROR_NONE;
2781 rp0 = vlib_buffer_get_current (b0);
2782 ip0 = (ip6_header_t *) & rp0->ip;
2783 rh0 = (icmp6_multicast_listener_report_header_t *) & rp0->report_hdr;
2785 memset (rp0, 0x0, sizeof (icmp6_multicast_listener_report_packet_t));
2787 ip0->ip_version_traffic_class_and_flow_label =
2788 clib_host_to_net_u32 (0x6 << 28);
2790 ip0->protocol = IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS;
2791 /* for DEBUG - vnet driver won't seem to emit router alerts */
2792 /* ip0->protocol = IP_PROTOCOL_ICMP6; */
2795 rh0->icmp.type = ICMP6_multicast_listener_report_v2;
2797 /* source address MUST be the link-local address */
2798 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2799 ip0->src_address = radv_info->link_local_address;
2801 /* destination is all mldpv2 routers */
2802 ip6_set_reserved_multicast_address (&ip0->dst_address,
2803 IP6_MULTICAST_SCOPE_link_local,
2804 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2806 /* add reports here */
2807 ip6_mldp_group_t *m;
2808 int num_addr_records = 0;
2809 icmp6_multicast_address_record_t rr;
2811 /* fill in the hop-by-hop extension header (router alert) info */
2812 rh0->ext_hdr.next_hdr = IP_PROTOCOL_ICMP6;
2813 rh0->ext_hdr.n_data_u64s = 0;
2815 rh0->alert.type = IP6_MLDP_ALERT_TYPE;
2817 rh0->alert.value = 0;
2822 rh0->icmp.checksum = 0;
2825 pool_foreach (m, radv_info->mldp_group_pool,
2828 rr.aux_data_len_u32s = 0;
2829 rr.num_sources = clib_host_to_net_u16 (m->num_sources);
2830 clib_memcpy(&rr.mcast_addr, &m->mcast_address, sizeof(ip6_address_t));
2834 vlib_buffer_add_data
2835 (vm, vlib_buffer_get_free_list_index (b0), bo0,
2836 (void *)&rr, sizeof(icmp6_multicast_address_record_t));
2838 payload_length += sizeof( icmp6_multicast_address_record_t);
2843 rh0->num_addr_records = clib_host_to_net_u16 (num_addr_records);
2845 /* update lengths */
2846 ip0->payload_length = clib_host_to_net_u16 (payload_length);
2848 rh0->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0,
2850 ASSERT (bogus_length == 0);
2853 * OK to override w/ no regard for actual FIB, because
2854 * ip6-rewrite only looks at the adjacency.
2856 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
2857 vnet_main.local_interface_sw_if_index;
2859 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
2860 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
2862 vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite-mcast");
2864 f = vlib_get_frame_to_node (vm, node->index);
2865 to_next = vlib_frame_vector_args (f);
2869 vlib_put_frame_to_node (vm, node->index, f);
2874 VLIB_REGISTER_NODE (ip6_icmp_router_solicitation_node,static) =
2876 .function = icmp6_router_solicitation,
2877 .name = "icmp6-router-solicitation",
2879 .vector_size = sizeof (u32),
2881 .format_trace = format_icmp6_input_trace,
2883 .n_next_nodes = ICMP6_ROUTER_SOLICITATION_N_NEXT,
2885 [ICMP6_ROUTER_SOLICITATION_NEXT_DROP] = "ip6-drop",
2886 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW] = "ip6-rewrite-mcast",
2887 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX] = "interface-output",
2892 /* send a RA or update the timer info etc.. */
2894 ip6_neighbor_process_timer_event (vlib_main_t * vm,
2895 vlib_node_runtime_t * node,
2896 vlib_frame_t * frame)
2898 vnet_main_t *vnm = vnet_get_main ();
2899 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2900 ip6_radv_t *radv_info;
2901 vlib_frame_t *f = 0;
2902 u32 n_this_frame = 0;
2903 u32 n_left_to_next = 0;
2906 icmp6_router_solicitation_header_t *h0;
2908 f64 now = vlib_time_now (vm);
2910 /* Interface ip6 radv info list */
2912 pool_foreach (radv_info, nm->if_radv_pool,
2914 if( !vnet_sw_interface_is_admin_up (vnm, radv_info->sw_if_index))
2916 radv_info->initial_adverts_sent = radv_info->initial_adverts_count-1;
2917 radv_info->next_multicast_time = now;
2918 radv_info->last_multicast_time = now;
2919 radv_info->last_radv_time = 0;
2920 radv_info->all_routers_mcast = 0;
2924 /* Make sure that we've joined the all-routers multicast group */
2925 if(!radv_info->all_routers_mcast)
2927 /* send MDLP_REPORT_EVENT message */
2928 ip6_neighbor_send_mldpv2_report(radv_info->sw_if_index);
2929 radv_info->all_routers_mcast = 1;
2932 /* is it time to send a multicast RA on this interface? */
2933 if(radv_info->send_radv && (now >= radv_info->next_multicast_time))
2938 f64 rfn = (radv_info->max_radv_interval - radv_info->min_radv_interval) *
2939 random_f64 (&radv_info->seed) + radv_info->min_radv_interval;
2941 /* multicast send - compute next multicast send time */
2942 if( radv_info->initial_adverts_sent > 0)
2944 radv_info->initial_adverts_sent--;
2945 if(rfn > radv_info-> initial_adverts_interval)
2946 rfn = radv_info-> initial_adverts_interval;
2948 /* check to see if we are ceasing to send */
2949 if( radv_info->initial_adverts_sent == 0)
2950 if(radv_info->cease_radv)
2951 radv_info->send_radv = 0;
2954 radv_info->next_multicast_time = rfn + now;
2955 radv_info->last_multicast_time = now;
2957 /* send advert now - build a "solicted" router advert with unspecified source address */
2958 n_allocated = vlib_buffer_alloc_from_free_list
2959 (vm, &bo0, n_to_alloc, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2961 if (PREDICT_FALSE(n_allocated == 0))
2963 clib_warning ("buffer allocation failure");
2966 b0 = vlib_get_buffer (vm, bo0);
2967 b0->current_length = sizeof( icmp6_router_solicitation_header_t);
2968 b0->error = ICMP6_ERROR_NONE;
2969 vnet_buffer (b0)->sw_if_index[VLIB_RX] = radv_info->sw_if_index;
2971 h0 = vlib_buffer_get_current (b0);
2973 memset (h0, 0, sizeof (icmp6_router_solicitation_header_t));
2975 h0->ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2976 h0->ip.payload_length = clib_host_to_net_u16 (sizeof (icmp6_router_solicitation_header_t)
2977 - STRUCT_OFFSET_OF (icmp6_router_solicitation_header_t, neighbor));
2978 h0->ip.protocol = IP_PROTOCOL_ICMP6;
2979 h0->ip.hop_limit = 255;
2981 /* set src/dst address as "unspecified" this marks this packet as internally generated rather than recieved */
2982 h0->ip.src_address.as_u64[0] = 0;
2983 h0->ip.src_address.as_u64[1] = 0;
2985 h0->ip.dst_address.as_u64[0] = 0;
2986 h0->ip.dst_address.as_u64[1] = 0;
2988 h0->neighbor.icmp.type = ICMP6_router_solicitation;
2990 if (PREDICT_FALSE(f == 0))
2992 f = vlib_get_frame_to_node (vm, ip6_icmp_router_solicitation_node.index);
2993 to_next = vlib_frame_vector_args (f);
2994 n_left_to_next = VLIB_FRAME_SIZE;
3003 if (PREDICT_FALSE(n_left_to_next == 0))
3005 f->n_vectors = n_this_frame;
3006 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
3015 ASSERT (n_this_frame);
3016 f->n_vectors = n_this_frame;
3017 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
3023 ip6_icmp_neighbor_discovery_event_process (vlib_main_t * vm,
3024 vlib_node_runtime_t * node,
3025 vlib_frame_t * frame)
3028 ip6_icmp_neighbor_discovery_event_data_t *event_data;
3030 /* init code here */
3034 vlib_process_wait_for_event_or_clock (vm, 1. /* seconds */ );
3036 event_data = vlib_process_get_event_data (vm, &event_type);
3040 /* No events found: timer expired. */
3041 /* process interface list and send RAs as appropriate, update timer info */
3042 ip6_neighbor_process_timer_event (vm, node, frame);
3049 case ICMP6_ND_EVENT_INIT:
3060 _vec_len (event_data) = 0;
3063 return frame->n_vectors;
3067 VLIB_REGISTER_NODE (ip6_icmp_router_advertisement_node,static) =
3069 .function = icmp6_router_advertisement,
3070 .name = "icmp6-router-advertisement",
3072 .vector_size = sizeof (u32),
3074 .format_trace = format_icmp6_input_trace,
3083 vlib_node_registration_t ip6_icmp_neighbor_discovery_event_node = {
3085 .function = ip6_icmp_neighbor_discovery_event_process,
3086 .name = "ip6-icmp-neighbor-discovery-event-process",
3087 .type = VLIB_NODE_TYPE_PROCESS,
3091 icmp6_neighbor_solicitation (vlib_main_t * vm,
3092 vlib_node_runtime_t * node, vlib_frame_t * frame)
3094 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
3095 /* is_solicitation */
3100 icmp6_neighbor_advertisement (vlib_main_t * vm,
3101 vlib_node_runtime_t * node,
3102 vlib_frame_t * frame)
3104 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
3105 /* is_solicitation */
3110 VLIB_REGISTER_NODE (ip6_icmp_neighbor_solicitation_node,static) =
3112 .function = icmp6_neighbor_solicitation,
3113 .name = "icmp6-neighbor-solicitation",
3115 .vector_size = sizeof (u32),
3117 .format_trace = format_icmp6_input_trace,
3119 .n_next_nodes = ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
3121 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP] = "ip6-drop",
3122 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY] = "interface-output",
3128 VLIB_REGISTER_NODE (ip6_icmp_neighbor_advertisement_node,static) =
3130 .function = icmp6_neighbor_advertisement,
3131 .name = "icmp6-neighbor-advertisement",
3133 .vector_size = sizeof (u32),
3135 .format_trace = format_icmp6_input_trace,
3146 IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
3147 IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX,
3148 IP6_DISCOVER_NEIGHBOR_N_NEXT,
3149 } ip6_discover_neighbor_next_t;
3153 IP6_DISCOVER_NEIGHBOR_ERROR_DROP,
3154 IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT,
3155 IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS,
3156 } ip6_discover_neighbor_error_t;
3159 ip6_discover_neighbor_inline (vlib_main_t * vm,
3160 vlib_node_runtime_t * node,
3161 vlib_frame_t * frame, int is_glean)
3163 vnet_main_t *vnm = vnet_get_main ();
3164 ip6_main_t *im = &ip6_main;
3165 ip_lookup_main_t *lm = &im->lookup_main;
3166 u32 *from, *to_next_drop;
3167 uword n_left_from, n_left_to_next_drop;
3170 u32 thread_index = vm->thread_index;
3172 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3174 if (node->flags & VLIB_NODE_FLAG_TRACE)
3175 ip6_forward_next_trace (vm, node, frame, VLIB_TX);
3177 time_now = vlib_time_now (vm);
3178 if (time_now - im->nd_throttle_last_seed_change_time[thread_index] > 1e-3)
3180 (void) random_u64 (&im->nd_throttle_seeds[thread_index]);
3181 memset (im->nd_throttle_bitmaps[thread_index], 0,
3182 ND_THROTTLE_BITS / BITS (u8));
3184 im->nd_throttle_last_seed_change_time[thread_index] = time_now;
3186 seed = im->nd_throttle_seeds[thread_index];
3188 from = vlib_frame_vector_args (frame);
3189 n_left_from = frame->n_vectors;
3191 while (n_left_from > 0)
3193 vlib_get_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
3194 to_next_drop, n_left_to_next_drop);
3196 while (n_left_from > 0 && n_left_to_next_drop > 0)
3200 u32 pi0, adj_index0, w0, sw_if_index0, drop0;
3203 ip_adjacency_t *adj0;
3204 vnet_hw_interface_t *hw_if0;
3205 ip6_radv_t *radv_info;
3210 p0 = vlib_get_buffer (vm, pi0);
3212 adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
3214 ip0 = vlib_buffer_get_current (p0);
3216 adj0 = adj_get (adj_index0);
3220 ip0->dst_address.as_u64[0] =
3221 adj0->sub_type.nbr.next_hop.ip6.as_u64[0];
3222 ip0->dst_address.as_u64[1] =
3223 adj0->sub_type.nbr.next_hop.ip6.as_u64[1];
3226 sw_if_index0 = adj0->rewrite_header.sw_if_index;
3227 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
3229 /* Compute the ND throttle bitmap hash */
3230 r0 = ip0->dst_address.as_u64[0] ^ ip0->dst_address.as_u64[1] ^ seed;
3232 /* Find the word and bit */
3233 r0 &= ND_THROTTLE_BITS - 1;
3234 w0 = r0 / BITS (uword);
3235 m0 = (uword) 1 << (r0 % BITS (uword));
3237 /* If the bit is set, drop the ND request */
3238 drop0 = (im->nd_throttle_bitmaps[thread_index][w0] & m0) != 0;
3239 /* (unconditionally) mark the bit "inuse" */
3240 im->nd_throttle_bitmaps[thread_index][w0] |= m0;
3244 to_next_drop[0] = pi0;
3246 n_left_to_next_drop -= 1;
3248 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
3250 /* If the interface is link-down, drop the pkt */
3251 if (!(hw_if0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
3254 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) > sw_if_index0)
3256 u32 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
3259 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3267 * the adj has been updated to a rewrite but the node the DPO that got
3268 * us here hasn't - yet. no big deal. we'll drop while we wait.
3270 if (IP_LOOKUP_NEXT_REWRITE == adj0->lookup_next_index)
3274 node->errors[drop0 ? IP6_DISCOVER_NEIGHBOR_ERROR_DROP
3275 : IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT];
3282 icmp6_neighbor_solicitation_header_t *h0;
3285 h0 = vlib_packet_template_get_packet
3286 (vm, &im->discover_neighbor_packet_template, &bi0);
3291 * Build ethernet header.
3292 * Choose source address based on destination lookup
3295 if (!ip6_src_address_for_packet (lm,
3298 &h0->ip.src_address))
3300 /* There is no address on the interface */
3302 node->errors[IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS];
3303 vlib_buffer_free (vm, &bi0, 1);
3308 * Destination address is a solicited node multicast address.
3309 * We need to fill in
3310 * the low 24 bits with low 24 bits of target's address.
3312 h0->ip.dst_address.as_u8[13] = ip0->dst_address.as_u8[13];
3313 h0->ip.dst_address.as_u8[14] = ip0->dst_address.as_u8[14];
3314 h0->ip.dst_address.as_u8[15] = ip0->dst_address.as_u8[15];
3316 h0->neighbor.target_address = ip0->dst_address;
3318 clib_memcpy (h0->link_layer_option.ethernet_address,
3319 hw_if0->hw_address, vec_len (hw_if0->hw_address));
3321 /* $$$$ appears we need this; why is the checksum non-zero? */
3322 h0->neighbor.icmp.checksum = 0;
3323 h0->neighbor.icmp.checksum =
3324 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h0->ip,
3327 ASSERT (bogus_length == 0);
3329 vlib_buffer_copy_trace_flag (vm, p0, bi0);
3330 b0 = vlib_get_buffer (vm, bi0);
3331 vnet_buffer (b0)->sw_if_index[VLIB_TX]
3332 = vnet_buffer (p0)->sw_if_index[VLIB_TX];
3334 vnet_buffer (b0)->ip.adj_index[VLIB_TX] =
3335 radv_info->mcast_adj_index;
3337 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
3338 next0 = IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX;
3340 vlib_set_next_frame_buffer (vm, node, next0, bi0);
3344 vlib_put_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
3345 n_left_to_next_drop);
3348 return frame->n_vectors;
3352 ip6_discover_neighbor (vlib_main_t * vm,
3353 vlib_node_runtime_t * node, vlib_frame_t * frame)
3355 return (ip6_discover_neighbor_inline (vm, node, frame, 0));
3359 ip6_glean (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
3361 return (ip6_discover_neighbor_inline (vm, node, frame, 1));
3364 static char *ip6_discover_neighbor_error_strings[] = {
3365 [IP6_DISCOVER_NEIGHBOR_ERROR_DROP] = "address overflow drops",
3366 [IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT] = "neighbor solicitations sent",
3367 [IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS]
3368 = "no source address for ND solicitation",
3372 VLIB_REGISTER_NODE (ip6_glean_node) =
3374 .function = ip6_glean,
3375 .name = "ip6-glean",
3376 .vector_size = sizeof (u32),
3377 .format_trace = format_ip6_forward_next_trace,
3378 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
3379 .error_strings = ip6_discover_neighbor_error_strings,
3380 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
3383 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "ip6-drop",
3384 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "ip6-rewrite-mcast",
3387 VLIB_REGISTER_NODE (ip6_discover_neighbor_node) =
3389 .function = ip6_discover_neighbor,
3390 .name = "ip6-discover-neighbor",
3391 .vector_size = sizeof (u32),
3392 .format_trace = format_ip6_forward_next_trace,
3393 .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
3394 .error_strings = ip6_discover_neighbor_error_strings,
3395 .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
3398 [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "ip6-drop",
3399 [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "ip6-rewrite-mcast",
3404 /* API support functions */
3406 ip6_neighbor_ra_config (vlib_main_t * vm, u32 sw_if_index,
3407 u8 suppress, u8 managed, u8 other,
3408 u8 ll_option, u8 send_unicast, u8 cease,
3409 u8 use_lifetime, u32 lifetime,
3410 u32 initial_count, u32 initial_interval,
3411 u32 max_interval, u32 min_interval, u8 is_no)
3413 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3417 /* look up the radv_t information for this interface */
3418 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3420 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3421 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
3426 ip6_radv_t *radv_info;
3427 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3429 if ((max_interval != 0) && (min_interval == 0))
3430 min_interval = .75 * max_interval;
3434 0) ? ((is_no) ? DEF_MAX_RADV_INTERVAL : max_interval) :
3435 radv_info->max_radv_interval;
3438 0) ? ((is_no) ? DEF_MIN_RADV_INTERVAL : min_interval) :
3439 radv_info->min_radv_interval;
3442 0) ? ((is_no) ? DEF_DEF_RTR_LIFETIME : lifetime) :
3443 radv_info->adv_router_lifetime_in_sec;
3447 if (lifetime > MAX_DEF_RTR_LIFETIME)
3448 lifetime = MAX_DEF_RTR_LIFETIME;
3450 if (lifetime <= max_interval)
3451 return VNET_API_ERROR_INVALID_VALUE;
3454 if (min_interval != 0)
3456 if ((min_interval > .75 * max_interval) || (min_interval < 3))
3457 return VNET_API_ERROR_INVALID_VALUE;
3460 if ((initial_count > MAX_INITIAL_RTR_ADVERTISEMENTS) ||
3461 (initial_interval > MAX_INITIAL_RTR_ADVERT_INTERVAL))
3462 return VNET_API_ERROR_INVALID_VALUE;
3465 if "flag" is set and is_no is true then restore default value else set value corresponding to "flag"
3466 if "flag" is clear don't change corresponding value
3468 radv_info->send_radv =
3469 (suppress != 0) ? ((is_no != 0) ? 1 : 0) : radv_info->send_radv;
3470 radv_info->adv_managed_flag =
3471 (managed != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_managed_flag;
3472 radv_info->adv_other_flag =
3473 (other != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_other_flag;
3474 radv_info->adv_link_layer_address =
3476 0) ? ((is_no) ? 1 : 0) : radv_info->adv_link_layer_address;
3477 radv_info->send_unicast =
3478 (send_unicast != 0) ? ((is_no) ? 0 : 1) : radv_info->send_unicast;
3479 radv_info->cease_radv =
3480 (cease != 0) ? ((is_no) ? 0 : 1) : radv_info->cease_radv;
3482 radv_info->min_radv_interval = min_interval;
3483 radv_info->max_radv_interval = max_interval;
3484 radv_info->adv_router_lifetime_in_sec = lifetime;
3486 radv_info->initial_adverts_count =
3488 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERTISEMENTS : initial_count) :
3489 radv_info->initial_adverts_count;
3490 radv_info->initial_adverts_interval =
3491 (initial_interval !=
3492 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERT_INTERVAL : initial_interval) :
3493 radv_info->initial_adverts_interval;
3496 if ((cease != 0) && (is_no))
3497 radv_info->send_radv = 1;
3499 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
3500 radv_info->next_multicast_time = vlib_time_now (vm);
3501 radv_info->last_multicast_time = vlib_time_now (vm);
3502 radv_info->last_radv_time = 0;
3508 ip6_neighbor_ra_prefix (vlib_main_t * vm, u32 sw_if_index,
3509 ip6_address_t * prefix_addr, u8 prefix_len,
3510 u8 use_default, u32 val_lifetime, u32 pref_lifetime,
3511 u8 no_advertise, u8 off_link, u8 no_autoconfig,
3512 u8 no_onlink, u8 is_no)
3514 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3519 /* look up the radv_t information for this interface */
3520 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3523 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3525 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
3529 f64 now = vlib_time_now (vm);
3530 ip6_radv_t *radv_info;
3531 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3533 /* prefix info add, delete or update */
3534 ip6_radv_prefix_t *prefix;
3536 /* lookup prefix info for this address on this interface */
3537 uword *p = mhash_get (&radv_info->address_to_prefix_index, prefix_addr);
3539 prefix = p ? pool_elt_at_index (radv_info->adv_prefixes_pool, p[0]) : 0;
3545 return VNET_API_ERROR_INVALID_VALUE; /* invalid prefix */
3547 if (prefix->prefix_len != prefix_len)
3548 return VNET_API_ERROR_INVALID_VALUE_2;
3550 /* FIXME - Should the DP do this or the CP ? */
3551 /* do specific delete processing here before returning */
3552 /* try to remove from routing table */
3554 mhash_unset (&radv_info->address_to_prefix_index, prefix_addr,
3556 pool_put (radv_info->adv_prefixes_pool, prefix);
3558 radv_info->initial_adverts_sent =
3559 radv_info->initial_adverts_count - 1;
3560 radv_info->next_multicast_time = vlib_time_now (vm);
3561 radv_info->last_multicast_time = vlib_time_now (vm);
3562 radv_info->last_radv_time = 0;
3566 /* adding or changing */
3571 pool_get (radv_info->adv_prefixes_pool, prefix);
3572 pi = prefix - radv_info->adv_prefixes_pool;
3573 mhash_set (&radv_info->address_to_prefix_index, prefix_addr, pi,
3576 memset (prefix, 0x0, sizeof (ip6_radv_prefix_t));
3578 prefix->prefix_len = prefix_len;
3579 clib_memcpy (&prefix->prefix, prefix_addr, sizeof (ip6_address_t));
3581 /* initialize default values */
3582 prefix->adv_on_link_flag = 1; /* L bit set */
3583 prefix->adv_autonomous_flag = 1; /* A bit set */
3584 prefix->adv_valid_lifetime_in_secs = DEF_ADV_VALID_LIFETIME;
3585 prefix->adv_pref_lifetime_in_secs = DEF_ADV_PREF_LIFETIME;
3586 prefix->enabled = 1;
3587 prefix->decrement_lifetime_flag = 1;
3588 prefix->deprecated_prefix_flag = 1;
3592 /* FIXME - Should the DP do this or the CP ? */
3593 /* insert prefix into routing table as a connected prefix */
3602 if (prefix->prefix_len != prefix_len)
3603 return VNET_API_ERROR_INVALID_VALUE_2;
3607 /* FIXME - Should the DP do this or the CP ? */
3608 /* remove from routing table if already there */
3612 if ((val_lifetime == ~0) || (pref_lifetime == ~0))
3614 prefix->adv_valid_lifetime_in_secs = ~0;
3615 prefix->adv_pref_lifetime_in_secs = ~0;
3616 prefix->decrement_lifetime_flag = 0;
3620 prefix->adv_valid_lifetime_in_secs = val_lifetime;;
3621 prefix->adv_pref_lifetime_in_secs = pref_lifetime;
3624 /* copy remaining */
3625 prefix->enabled = !(no_advertise != 0);
3626 prefix->adv_on_link_flag = !((off_link != 0) || (no_onlink != 0));
3627 prefix->adv_autonomous_flag = !(no_autoconfig != 0);
3631 /* fill in the expiration times */
3632 prefix->valid_lifetime_expires =
3633 now + prefix->adv_valid_lifetime_in_secs;
3634 prefix->pref_lifetime_expires = now + prefix->adv_pref_lifetime_in_secs;
3636 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
3637 radv_info->next_multicast_time = vlib_time_now (vm);
3638 radv_info->last_multicast_time = vlib_time_now (vm);
3639 radv_info->last_radv_time = 0;
3645 ip6_neighbor_cmd (vlib_main_t * vm, unformat_input_t * main_input,
3646 vlib_cli_command_t * cmd)
3648 vnet_main_t *vnm = vnet_get_main ();
3649 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3650 clib_error_t *error = 0;
3652 u8 suppress = 0, managed = 0, other = 0;
3653 u8 suppress_ll_option = 0, send_unicast = 0, cease = 0;
3654 u8 use_lifetime = 0;
3655 u32 sw_if_index, ra_lifetime = 0, ra_initial_count =
3656 0, ra_initial_interval = 0;
3657 u32 ra_max_interval = 0, ra_min_interval = 0;
3659 unformat_input_t _line_input, *line_input = &_line_input;
3660 vnet_sw_interface_t *sw_if0;
3662 int add_radv_info = 1;
3663 __attribute__ ((unused)) ip6_radv_t *radv_info = 0;
3664 ip6_address_t ip6_addr;
3668 /* Get a line of input. */
3669 if (!unformat_user (main_input, unformat_line_input, line_input))
3672 /* get basic radv info for this interface */
3673 if (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3676 if (unformat_user (line_input,
3677 unformat_vnet_sw_interface, vnm, &sw_if_index))
3680 ethernet_interface_t *eth_if0 = 0;
3682 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
3683 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
3685 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
3690 clib_error_return (0, "Interface must be of ethernet type");
3694 /* look up the radv_t information for this interface */
3695 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3698 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3702 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3706 error = clib_error_return (0, "unknown interface %U'",
3707 format_unformat_error, line_input);
3713 error = clib_error_return (0, "invalid interface name %U'",
3714 format_unformat_error, line_input);
3719 /* get the rest of the command */
3720 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3722 if (unformat (line_input, "no"))
3724 else if (unformat (line_input, "prefix %U/%d",
3725 unformat_ip6_address, &ip6_addr, &addr_len))
3730 else if (unformat (line_input, "ra-managed-config-flag"))
3735 else if (unformat (line_input, "ra-other-config-flag"))
3740 else if (unformat (line_input, "ra-suppress") ||
3741 unformat (line_input, "ra-surpress"))
3746 else if (unformat (line_input, "ra-suppress-link-layer") ||
3747 unformat (line_input, "ra-surpress-link-layer"))
3749 suppress_ll_option = 1;
3752 else if (unformat (line_input, "ra-send-unicast"))
3757 else if (unformat (line_input, "ra-lifetime"))
3759 if (!unformat (line_input, "%d", &ra_lifetime))
3761 error = unformat_parse_error (line_input);
3767 else if (unformat (line_input, "ra-initial"))
3770 (line_input, "%d %d", &ra_initial_count, &ra_initial_interval))
3772 error = unformat_parse_error (line_input);
3777 else if (unformat (line_input, "ra-interval"))
3779 if (!unformat (line_input, "%d", &ra_max_interval))
3781 error = unformat_parse_error (line_input);
3785 if (!unformat (line_input, "%d", &ra_min_interval))
3786 ra_min_interval = 0;
3789 else if (unformat (line_input, "ra-cease"))
3796 error = unformat_parse_error (line_input);
3803 ip6_neighbor_ra_config (vm, sw_if_index,
3804 suppress, managed, other,
3805 suppress_ll_option, send_unicast, cease,
3806 use_lifetime, ra_lifetime,
3807 ra_initial_count, ra_initial_interval,
3808 ra_max_interval, ra_min_interval, is_no);
3812 u32 valid_lifetime_in_secs = 0;
3813 u32 pref_lifetime_in_secs = 0;
3814 u8 use_prefix_default_values = 0;
3815 u8 no_advertise = 0;
3817 u8 no_autoconfig = 0;
3820 /* get the rest of the command */
3821 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3823 if (unformat (line_input, "default"))
3825 use_prefix_default_values = 1;
3828 else if (unformat (line_input, "infinite"))
3830 valid_lifetime_in_secs = ~0;
3831 pref_lifetime_in_secs = ~0;
3834 else if (unformat (line_input, "%d %d", &valid_lifetime_in_secs,
3835 &pref_lifetime_in_secs))
3842 /* get the rest of the command */
3843 while (!use_prefix_default_values &&
3844 unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3846 if (unformat (line_input, "no-advertise"))
3848 else if (unformat (line_input, "off-link"))
3850 else if (unformat (line_input, "no-autoconfig"))
3852 else if (unformat (line_input, "no-onlink"))
3856 error = unformat_parse_error (line_input);
3861 ip6_neighbor_ra_prefix (vm, sw_if_index,
3862 &ip6_addr, addr_len,
3863 use_prefix_default_values,
3864 valid_lifetime_in_secs,
3865 pref_lifetime_in_secs,
3867 off_link, no_autoconfig, no_onlink, is_no);
3871 unformat_free (line_input);
3877 ip6_print_addrs (vlib_main_t * vm, u32 * addrs)
3879 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3882 for (i = 0; i < vec_len (addrs); i++)
3884 ip_interface_address_t *a =
3885 pool_elt_at_index (lm->if_address_pool, addrs[i]);
3886 ip6_address_t *address = ip_interface_address_get_address (lm, a);
3888 vlib_cli_output (vm, "\t\t%U/%d",
3889 format_ip6_address, address, a->address_length);
3893 static clib_error_t *
3894 show_ip6_interface_cmd (vlib_main_t * vm,
3895 unformat_input_t * input, vlib_cli_command_t * cmd)
3897 vnet_main_t *vnm = vnet_get_main ();
3898 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3899 clib_error_t *error = 0;
3904 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3908 /* look up the radv_t information for this interface */
3909 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3912 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3916 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3917 ip6_radv_t *radv_info;
3918 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3920 vlib_cli_output (vm, "%U is admin %s\n",
3921 format_vnet_sw_interface_name, vnm,
3922 vnet_get_sw_interface (vnm, sw_if_index),
3923 (vnet_sw_interface_is_admin_up (vnm, sw_if_index) ?
3927 u32 *link_scope = 0, *global_scope = 0;
3928 u32 *local_scope = 0, *unknown_scope = 0;
3929 ip_interface_address_t *a;
3931 vec_validate_init_empty (lm->if_address_pool_index_by_sw_if_index,
3933 ai = lm->if_address_pool_index_by_sw_if_index[sw_if_index];
3935 while (ai != (u32) ~ 0)
3937 a = pool_elt_at_index (lm->if_address_pool, ai);
3938 ip6_address_t *address =
3939 ip_interface_address_get_address (lm, a);
3941 if (ip6_address_is_link_local_unicast (address))
3942 vec_add1 (link_scope, ai);
3943 else if (ip6_address_is_global_unicast (address))
3944 vec_add1 (global_scope, ai);
3945 else if (ip6_address_is_local_unicast (address))
3946 vec_add1 (local_scope, ai);
3948 vec_add1 (unknown_scope, ai);
3950 ai = a->next_this_sw_interface;
3953 if (vec_len (link_scope))
3955 vlib_cli_output (vm, "\tLink-local address(es):\n");
3956 ip6_print_addrs (vm, link_scope);
3957 vec_free (link_scope);
3960 if (vec_len (local_scope))
3962 vlib_cli_output (vm, "\tLocal unicast address(es):\n");
3963 ip6_print_addrs (vm, local_scope);
3964 vec_free (local_scope);
3967 if (vec_len (global_scope))
3969 vlib_cli_output (vm, "\tGlobal unicast address(es):\n");
3970 ip6_print_addrs (vm, global_scope);
3971 vec_free (global_scope);
3974 if (vec_len (unknown_scope))
3976 vlib_cli_output (vm, "\tOther-scope address(es):\n");
3977 ip6_print_addrs (vm, unknown_scope);
3978 vec_free (unknown_scope);
3981 vlib_cli_output (vm, "\tLink-local address(es):\n");
3982 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
3983 &radv_info->link_local_address);
3985 vlib_cli_output (vm, "\tJoined group address(es):\n");
3986 ip6_mldp_group_t *m;
3988 pool_foreach (m, radv_info->mldp_group_pool,
3990 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
3995 vlib_cli_output (vm, "\tAdvertised Prefixes:\n");
3996 ip6_radv_prefix_t *p;
3998 pool_foreach (p, radv_info->adv_prefixes_pool,
4000 vlib_cli_output (vm, "\t\tprefix %U, length %d\n",
4001 format_ip6_address, &p->prefix, p->prefix_len);
4005 vlib_cli_output (vm, "\tMTU is %d\n", radv_info->adv_link_mtu);
4006 vlib_cli_output (vm, "\tICMP error messages are unlimited\n");
4007 vlib_cli_output (vm, "\tICMP redirects are disabled\n");
4008 vlib_cli_output (vm, "\tICMP unreachables are not sent\n");
4009 vlib_cli_output (vm, "\tND DAD is disabled\n");
4010 //vlib_cli_output (vm, "\tND reachable time is %d milliseconds\n",);
4011 vlib_cli_output (vm, "\tND advertised reachable time is %d\n",
4012 radv_info->adv_neighbor_reachable_time_in_msec);
4013 vlib_cli_output (vm,
4014 "\tND advertised retransmit interval is %d (msec)\n",
4016 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
4018 u32 ra_interval = radv_info->max_radv_interval;
4019 u32 ra_interval_min = radv_info->min_radv_interval;
4020 vlib_cli_output (vm,
4021 "\tND router advertisements are sent every %d seconds (min interval is %d)\n",
4022 ra_interval, ra_interval_min);
4023 vlib_cli_output (vm,
4024 "\tND router advertisements live for %d seconds\n",
4025 radv_info->adv_router_lifetime_in_sec);
4026 vlib_cli_output (vm,
4027 "\tHosts %s stateless autoconfig for addresses\n",
4028 (radv_info->adv_managed_flag) ? "use" :
4030 vlib_cli_output (vm, "\tND router advertisements sent %d\n",
4031 radv_info->n_advertisements_sent);
4032 vlib_cli_output (vm, "\tND router solicitations received %d\n",
4033 radv_info->n_solicitations_rcvd);
4034 vlib_cli_output (vm, "\tND router solicitations dropped %d\n",
4035 radv_info->n_solicitations_dropped);
4039 error = clib_error_return (0, "IPv6 not enabled on interface",
4040 format_unformat_error, input);
4048 * This command is used to display various IPv6 attributes on a given
4052 * Example of how to display IPv6 settings:
4053 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
4054 * GigabitEthernet2/0/0 is admin up
4055 * Link-local address(es):
4057 * Joined group address(es):
4062 * Advertised Prefixes:
4063 * prefix fe80::fe:28ff:fe9c:75b3, length 64
4065 * ICMP error messages are unlimited
4066 * ICMP redirects are disabled
4067 * ICMP unreachables are not sent
4068 * ND DAD is disabled
4069 * ND advertised reachable time is 0
4070 * ND advertised retransmit interval is 0 (msec)
4071 * ND router advertisements are sent every 200 seconds (min interval is 150)
4072 * ND router advertisements live for 600 seconds
4073 * Hosts use stateless autoconfig for addresses
4074 * ND router advertisements sent 19336
4075 * ND router solicitations received 0
4076 * ND router solicitations dropped 0
4078 * Example of output if IPv6 is not enabled on the interface:
4079 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
4080 * show ip6 interface: IPv6 not enabled on interface
4084 VLIB_CLI_COMMAND (show_ip6_interface_command, static) =
4086 .path = "show ip6 interface",
4087 .function = show_ip6_interface_cmd,
4088 .short_help = "show ip6 interface <interface>",
4093 disable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
4095 clib_error_t *error = 0;
4096 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4099 /* look up the radv_t information for this interface */
4100 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
4102 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4104 /* if not created - do nothing */
4107 ip6_radv_t *radv_info;
4109 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4111 /* check radv_info ref count for other ip6 addresses on this interface */
4112 /* This implicitly excludes the link local address */
4113 if (radv_info->ref_count == 0)
4115 /* essentially "disables" ipv6 on this interface */
4116 ip6_ll_prefix_t ilp = {
4117 .ilp_addr = radv_info->link_local_address,
4118 .ilp_sw_if_index = sw_if_index,
4120 ip6_ll_table_entry_delete (&ilp);
4121 ip6_sw_interface_enable_disable (sw_if_index, 0);
4122 ip6_mfib_interface_enable_disable (sw_if_index, 0);
4123 ip6_neighbor_sw_interface_add_del (vnet_get_main (), sw_if_index,
4131 ip6_interface_enabled (vlib_main_t * vm, u32 sw_if_index)
4133 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4136 /* look up the radv_t information for this interface */
4137 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
4140 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4146 enable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
4148 clib_error_t *error = 0;
4149 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4153 /* look up the radv_t information for this interface */
4154 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
4157 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4159 /* if not created yet */
4162 vnet_main_t *vnm = vnet_get_main ();
4163 vnet_sw_interface_t *sw_if0;
4165 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
4166 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
4168 ethernet_interface_t *eth_if0;
4171 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
4174 /* create radv_info. for this interface. This holds all the info needed for router adverts */
4176 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, is_add);
4180 ip6_radv_t *radv_info;
4181 ip6_address_t link_local_address;
4183 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4185 ip6_link_local_address_from_ethernet_mac_address
4186 (&link_local_address, eth_if0->address);
4188 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index);
4189 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_SUB ||
4190 sw_if0->type == VNET_SW_INTERFACE_TYPE_PIPE ||
4191 sw_if0->type == VNET_SW_INTERFACE_TYPE_P2P)
4193 /* make up an interface id */
4194 link_local_address.as_u64[1] =
4195 random_u64 (&radv_info->randomizer);
4197 link_local_address.as_u64[0] =
4198 clib_host_to_net_u64 (0xFE80000000000000ULL);
4200 link_local_address.as_u8[8] &= 0xfd;
4203 ip6_ll_prefix_t ilp = {
4204 .ilp_addr = link_local_address,
4205 .ilp_sw_if_index = sw_if_index,
4208 ip6_ll_table_entry_update (&ilp, FIB_ROUTE_PATH_LOCAL);
4211 /* essentially "enables" ipv6 on this interface */
4212 ip6_mfib_interface_enable_disable (sw_if_index, 1);
4213 ip6_sw_interface_enable_disable (sw_if_index, 1);
4217 radv_info->link_local_address = link_local_address;
4227 ip6_get_ll_address (u32 sw_if_index, ip6_address_t * addr)
4229 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4230 ip6_radv_t *radv_info;
4233 if (vec_len (nm->if_radv_pool_index_by_sw_if_index) <= sw_if_index)
4236 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4241 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4242 *addr = radv_info->link_local_address;
4247 static clib_error_t *
4248 enable_ip6_interface_cmd (vlib_main_t * vm,
4249 unformat_input_t * input, vlib_cli_command_t * cmd)
4251 vnet_main_t *vnm = vnet_get_main ();
4252 clib_error_t *error = 0;
4257 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4259 enable_ip6_interface (vm, sw_if_index);
4263 error = clib_error_return (0, "unknown interface\n'",
4264 format_unformat_error, input);
4271 * This command is used to enable IPv6 on a given interface.
4274 * Example of how enable IPv6 on a given interface:
4275 * @cliexcmd{enable ip6 interface GigabitEthernet2/0/0}
4278 VLIB_CLI_COMMAND (enable_ip6_interface_command, static) =
4280 .path = "enable ip6 interface",
4281 .function = enable_ip6_interface_cmd,
4282 .short_help = "enable ip6 interface <interface>",
4286 static clib_error_t *
4287 disable_ip6_interface_cmd (vlib_main_t * vm,
4288 unformat_input_t * input, vlib_cli_command_t * cmd)
4290 vnet_main_t *vnm = vnet_get_main ();
4291 clib_error_t *error = 0;
4296 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4298 error = disable_ip6_interface (vm, sw_if_index);
4302 error = clib_error_return (0, "unknown interface\n'",
4303 format_unformat_error, input);
4310 * This command is used to disable IPv6 on a given interface.
4313 * Example of how disable IPv6 on a given interface:
4314 * @cliexcmd{disable ip6 interface GigabitEthernet2/0/0}
4317 VLIB_CLI_COMMAND (disable_ip6_interface_command, static) =
4319 .path = "disable ip6 interface",
4320 .function = disable_ip6_interface_cmd,
4321 .short_help = "disable ip6 interface <interface>",
4326 * This command is used to configure the neighbor discovery
4327 * parameters on a given interface. Use the '<em>show ip6 interface</em>'
4328 * command to display some of the current neighbor discovery parameters
4329 * on a given interface. This command has three formats:
4332 * <b>Format 1 - Router Advertisement Options:</b> (Only one can be entered in a single command)
4334 * '<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>'
4338 * <em>[no] ra-managed-config-flag</em> - Advertises in ICMPv6
4339 * router-advertisement messages to use stateful address
4340 * auto-configuration to obtain address information (sets the M-bit).
4341 * Default is the M-bit is not set and the '<em>no</em>' option
4342 * returns it to this default state.
4344 * <em>[no] ra-other-config-flag</em> - Indicates in ICMPv6
4345 * router-advertisement messages that hosts use stateful auto
4346 * configuration to obtain nonaddress related information (sets
4347 * the O-bit). Default is the O-bit is not set and the '<em>no</em>'
4348 * option returns it to this default state.
4350 * <em>[no] ra-suppress</em> - Disables sending ICMPv6 router-advertisement
4351 * messages. The '<em>no</em>' option implies to enable sending ICMPv6
4352 * router-advertisement messages.
4354 * <em>[no] ra-suppress-link-layer</em> - Indicates not to include the
4355 * optional source link-layer address in the ICMPv6 router-advertisement
4356 * messages. Default is to include the optional source link-layer address
4357 * and the '<em>no</em>' option returns it to this default state.
4359 * <em>[no] ra-send-unicast</em> - Use the source address of the
4360 * router-solicitation message if availiable. The default is to use
4361 * multicast address of all nodes, and the '<em>no</em>' option returns
4362 * it to this default state.
4364 * <em>[no] ra-lifetime <lifetime></em> - Advertises the lifetime of a
4365 * default router in ICMPv6 router-advertisement messages. The range is
4366 * from 0 to 9000 seconds. '<em><lifetime></em>' must be greater than
4367 * '<em><max-interval></em>'. The default value is 600 seconds and the
4368 * '<em>no</em>' option returns it to this default value.
4370 * <em>[no] ra-initial <cnt> <interval></em> - Number of initial ICMPv6
4371 * router-advertisement messages sent and the interval between each
4372 * message. Range for count is 1 - 3 and default is 3. Range for interval
4373 * is 1 to 16 seconds, and default is 16 seconds. The '<em>no</em>' option
4374 * returns both to their default value.
4376 * <em>[no] ra-interval <max-interval> [<min-interval>]</em> - Configures the
4377 * interval between sending ICMPv6 router-advertisement messages. The
4378 * range for max-interval is from 4 to 200 seconds. min-interval can not
4379 * be more than 75% of max-interval. If not set, min-interval will be
4380 * set to 75% of max-interval. The range for min-interval is from 3 to
4381 * 150 seconds. The '<em>no</em>' option returns both to their default
4384 * <em>[no] ra-cease</em> - Cease sending ICMPv6 router-advertisement messages.
4385 * The '<em>no</em>' options implies to start (or restart) sending
4386 * ICMPv6 router-advertisement messages.
4389 * <b>Format 2 - Prefix Options:</b>
4391 * '<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>'
4395 * <em>no</em> - All additional flags are ignored and the prefix is deleted.
4397 * <em><valid-lifetime> <pref-lifetime></em> - '<em><valid-lifetime></em>' is the
4398 * length of time in seconds during what the prefix is valid for the purpose of
4399 * on-link determination. Range is 7203 to 2592000 seconds and default is 2592000
4400 * seconds (30 days). '<em><pref-lifetime></em>' is the prefered-lifetime and is the
4401 * length of time in seconds during what addresses generated from the prefix remain
4402 * preferred. Range is 0 to 604800 seconds and default is 604800 seconds (7 days).
4404 * <em>infinite</em> - Both '<em><valid-lifetime></em>' and '<em><<pref-lifetime></em>'
4405 * are inifinte, no timeout.
4407 * <em>no-advertise</em> - Do not send full router address in prefix
4408 * advertisement. Default is to advertise (i.e. - This flag is off by default).
4410 * <em>off-link</em> - Prefix is off-link, clear L-bit in packet. Default is on-link
4411 * (i.e. - This flag is off and L-bit in packet is set by default and this prefix can
4412 * be used for on-link determination). '<em>no-onlink</em>' also controls the L-bit.
4414 * <em>no-autoconfig</em> - Do not use prefix for autoconfiguration, clear A-bit in packet.
4415 * Default is autoconfig (i.e. - This flag is off and A-bit in packet is set by default.
4417 * <em>no-onlink</em> - Do not use prefix for onlink determination, clear L-bit in packet.
4418 * Default is on-link (i.e. - This flag is off and L-bit in packet is set by default and
4419 * this prefix can be used for on-link determination). '<em>off-link</em>' also controls
4423 * <b>Format 3: - Default of Prefix:</b>
4425 * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> default</b></em>'
4427 * When a new prefix is added (or existing one is being overwritten) <em>default</em>
4428 * uses default values for the prefix. If <em>no</em> is used, the <em>default</em>
4429 * is ignored and the prefix is deleted.
4433 * Example of how set a router advertisement option:
4434 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 ra-interval 100 20}
4435 * Example of how to add a prefix:
4436 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 prefix fe80::fe:28ff:fe9c:75b3/64 infinite no-advertise}
4437 * Example of how to delete a prefix:
4438 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 no prefix fe80::fe:28ff:fe9c:75b3/64}
4441 VLIB_CLI_COMMAND (ip6_nd_command, static) =
4444 .short_help = "ip6 nd <interface> ...",
4445 .function = ip6_neighbor_cmd,
4450 set_ip6_link_local_address (vlib_main_t * vm,
4451 u32 sw_if_index, ip6_address_t * address)
4453 clib_error_t *error = 0;
4454 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4456 ip6_radv_t *radv_info;
4457 vnet_main_t *vnm = vnet_get_main ();
4459 if (!ip6_address_is_link_local_unicast (address))
4461 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_LINK_LOCAL;
4462 return (error = clib_error_return (0, "address not link-local",
4463 format_unformat_error));
4466 /* call enable ipv6 */
4467 enable_ip6_interface (vm, sw_if_index);
4469 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4473 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4475 /* save if link local address (overwrite default) */
4477 /* delete the old one */
4478 error = ip6_add_del_interface_address (vm, sw_if_index,
4479 &radv_info->link_local_address,
4480 128, 1 /* is_del */ );
4484 /* add the new one */
4485 error = ip6_add_del_interface_address (vm, sw_if_index,
4491 radv_info->link_local_address = *address;
4497 vnm->api_errno = VNET_API_ERROR_IP6_NOT_ENABLED;
4498 error = clib_error_return (0, "ip6 not enabled for interface",
4499 format_unformat_error);
4505 set_ip6_link_local_address_cmd (vlib_main_t * vm,
4506 unformat_input_t * input,
4507 vlib_cli_command_t * cmd)
4509 vnet_main_t *vnm = vnet_get_main ();
4510 clib_error_t *error = 0;
4512 ip6_address_t ip6_addr;
4514 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4516 /* get the rest of the command */
4517 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
4519 if (unformat (input, "%U", unformat_ip6_address, &ip6_addr))
4522 return (unformat_parse_error (input));
4525 error = set_ip6_link_local_address (vm, sw_if_index, &ip6_addr);
4530 * This command is used to assign an IPv6 Link-local address to an
4531 * interface. This command will enable IPv6 on an interface if it
4532 * is not already enabled. Use the '<em>show ip6 interface</em>' command
4533 * to display the assigned Link-local address.
4536 * Example of how to assign an IPv6 Link-local address to an interface:
4537 * @cliexcmd{set ip6 link-local address GigabitEthernet2/0/0 FE80::AB8}
4540 VLIB_CLI_COMMAND (set_ip6_link_local_address_command, static) =
4542 .path = "set ip6 link-local address",
4543 .short_help = "set ip6 link-local address <interface> <ip6-address>",
4544 .function = set_ip6_link_local_address_cmd,
4549 * @brief callback when an interface address is added or deleted
4552 ip6_neighbor_add_del_interface_address (ip6_main_t * im,
4555 ip6_address_t * address,
4557 u32 if_address_index, u32 is_delete)
4559 vnet_main_t *vnm = vnet_get_main ();
4560 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4562 vlib_main_t *vm = vnm->vlib_main;
4563 ip6_radv_t *radv_info;
4566 /* create solicited node multicast address for this interface adddress */
4567 ip6_set_solicited_node_multicast_address (&a, 0);
4569 a.as_u8[0xd] = address->as_u8[0xd];
4570 a.as_u8[0xe] = address->as_u8[0xe];
4571 a.as_u8[0xf] = address->as_u8[0xf];
4575 /* try to create radv_info - does nothing if ipv6 already enabled */
4576 enable_ip6_interface (vm, sw_if_index);
4578 /* look up the radv_t information for this interface */
4579 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
4581 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4585 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4588 if (!ip6_address_is_link_local_unicast (address))
4589 radv_info->ref_count++;
4591 ip6_neighbor_add_mld_prefix (radv_info, &a);
4598 /* look up the radv_t information for this interface */
4599 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
4601 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
4606 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
4608 ip6_neighbor_del_mld_prefix (radv_info, &a);
4610 /* if interface up send MLDP "report" */
4611 radv_info->all_routers_mcast = 0;
4614 if (!ip6_address_is_link_local_unicast (address))
4615 radv_info->ref_count--;
4617 /* Ensure that IPv6 is disabled, and LL removed after ref_count reaches 0 */
4618 disable_ip6_interface (vm, sw_if_index);
4623 ip6_set_neighbor_limit (u32 neighbor_limit)
4625 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4627 nm->limit_neighbor_cache_size = neighbor_limit;
4632 ip6_neighbor_table_bind (ip6_main_t * im,
4635 u32 new_fib_index, u32 old_fib_index)
4637 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4638 ip6_neighbor_t *n = NULL;
4639 u32 i, *to_re_add = 0;
4642 pool_foreach (n, nm->neighbor_pool,
4644 if (n->key.sw_if_index == sw_if_index)
4645 vec_add1 (to_re_add, n - nm->neighbor_pool);
4649 for (i = 0; i < vec_len (to_re_add); i++)
4651 n = pool_elt_at_index (nm->neighbor_pool, to_re_add[i]);
4652 ip6_neighbor_adj_fib_remove (n, old_fib_index);
4653 ip6_neighbor_adj_fib_add (n, new_fib_index);
4655 vec_free (to_re_add);
4658 static clib_error_t *
4659 ip6_neighbor_init (vlib_main_t * vm)
4661 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4662 ip6_main_t *im = &ip6_main;
4664 mhash_init (&nm->neighbor_index_by_key,
4665 /* value size */ sizeof (uword),
4666 /* key size */ sizeof (ip6_neighbor_key_t));
4668 icmp6_register_type (vm, ICMP6_neighbor_solicitation,
4669 ip6_icmp_neighbor_solicitation_node.index);
4670 icmp6_register_type (vm, ICMP6_neighbor_advertisement,
4671 ip6_icmp_neighbor_advertisement_node.index);
4672 icmp6_register_type (vm, ICMP6_router_solicitation,
4673 ip6_icmp_router_solicitation_node.index);
4674 icmp6_register_type (vm, ICMP6_router_advertisement,
4675 ip6_icmp_router_advertisement_node.index);
4677 /* handler node for ip6 neighbor discovery events and timers */
4678 vlib_register_node (vm, &ip6_icmp_neighbor_discovery_event_node);
4680 /* add call backs */
4681 ip6_add_del_interface_address_callback_t cb;
4682 memset (&cb, 0x0, sizeof (ip6_add_del_interface_address_callback_t));
4684 /* when an interface address changes... */
4685 cb.function = ip6_neighbor_add_del_interface_address;
4686 cb.function_opaque = 0;
4687 vec_add1 (im->add_del_interface_address_callbacks, cb);
4689 ip6_table_bind_callback_t cbt;
4690 cbt.function = ip6_neighbor_table_bind;
4691 cbt.function_opaque = 0;
4692 vec_add1 (im->table_bind_callbacks, cbt);
4694 mhash_init (&nm->pending_resolutions_by_address,
4695 /* value size */ sizeof (uword),
4696 /* key size */ sizeof (ip6_address_t));
4698 mhash_init (&nm->mac_changes_by_address,
4699 /* value size */ sizeof (uword),
4700 /* key size */ sizeof (ip6_address_t));
4702 /* default, configurable */
4703 nm->limit_neighbor_cache_size = 50000;
4705 nm->wc_ip6_nd_publisher_node = (uword) ~ 0;
4707 nm->ip6_ra_publisher_node = (uword) ~ 0;
4710 /* $$$$ Hack fix for today */
4711 vec_validate_init_empty
4712 (im->discover_neighbor_next_index_by_hw_if_index, 32, 0 /* drop */ );
4718 VLIB_INIT_FUNCTION (ip6_neighbor_init);
4722 vnet_register_ip6_neighbor_resolution_event (vnet_main_t * vnm,
4725 uword type_opaque, uword data)
4727 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4728 ip6_address_t *address = address_arg;
4730 pending_resolution_t *pr;
4732 pool_get (nm->pending_resolutions, pr);
4734 pr->next_index = ~0;
4735 pr->node_index = node_index;
4736 pr->type_opaque = type_opaque;
4739 p = mhash_get (&nm->pending_resolutions_by_address, address);
4742 /* Insert new resolution at the head of the list */
4743 pr->next_index = p[0];
4744 mhash_unset (&nm->pending_resolutions_by_address, address, 0);
4747 mhash_set (&nm->pending_resolutions_by_address, address,
4748 pr - nm->pending_resolutions, 0 /* old value */ );
4752 vnet_add_del_ip6_nd_change_event (vnet_main_t * vnm,
4753 void *data_callback,
4757 uword type_opaque, uword data, int is_add)
4759 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4760 ip6_address_t *address = address_arg;
4762 /* Try to find an existing entry */
4763 u32 *first = (u32 *) mhash_get (&nm->mac_changes_by_address, address);
4765 pending_resolution_t *mc;
4766 while (p && *p != ~0)
4768 mc = pool_elt_at_index (nm->mac_changes, *p);
4769 if (mc->node_index == node_index && mc->type_opaque == type_opaque
4772 p = &mc->next_index;
4775 int found = p && *p != ~0;
4779 return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
4781 pool_get (nm->mac_changes, mc);
4783 *mc = (pending_resolution_t)
4786 .node_index = node_index,
4787 .type_opaque = type_opaque,
4789 .data_callback = data_callback,
4794 /* Insert new resolution at the end of the list */
4795 u32 new_idx = mc - nm->mac_changes;
4799 mhash_set (&nm->mac_changes_by_address, address, new_idx, 0);
4804 return VNET_API_ERROR_NO_SUCH_ENTRY;
4806 /* Clients may need to clean up pool entries, too */
4807 void (*fp) (u32, u8 *) = data_callback;
4809 (*fp) (mc->data, 0 /* no new mac addrs */ );
4811 /* Remove the entry from the list and delete the entry */
4812 *p = mc->next_index;
4813 pool_put (nm->mac_changes, mc);
4815 /* Remove from hash if we deleted the last entry */
4816 if (*p == ~0 && p == first)
4817 mhash_unset (&nm->mac_changes_by_address, address, 0);
4823 vnet_ip6_nd_term (vlib_main_t * vm,
4824 vlib_node_runtime_t * node,
4826 ethernet_header_t * eth,
4827 ip6_header_t * ip, u32 sw_if_index, u16 bd_index)
4829 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4830 icmp6_neighbor_solicitation_or_advertisement_header_t *ndh;
4832 ndh = ip6_next_header (ip);
4833 if (ndh->icmp.type != ICMP6_neighbor_solicitation &&
4834 ndh->icmp.type != ICMP6_neighbor_advertisement)
4837 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
4838 (p0->flags & VLIB_BUFFER_IS_TRACED)))
4840 u8 *t0 = vlib_add_trace (vm, node, p0,
4841 sizeof (icmp6_input_trace_t));
4842 clib_memcpy (t0, ip, sizeof (icmp6_input_trace_t));
4845 /* Check if anyone want ND events for L2 BDs */
4847 (nm->wc_ip6_nd_publisher_node != (uword) ~ 0
4848 && !ip6_address_is_link_local_unicast (&ip->src_address)))
4850 vnet_nd_wc_publish (sw_if_index, eth->src_address, &ip->src_address);
4853 /* Check if MAC entry exsist for solicited target IP */
4854 if (ndh->icmp.type == ICMP6_neighbor_solicitation)
4856 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *opt;
4857 l2_bridge_domain_t *bd_config;
4860 opt = (void *) (ndh + 1);
4861 if ((opt->header.type !=
4862 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address) ||
4863 (opt->header.n_data_u64s != 1))
4864 return 0; /* source link layer address option not present */
4866 bd_config = vec_elt_at_index (l2input_main.bd_configs, bd_index);
4868 (u8 *) hash_get_mem (bd_config->mac_by_ip6, &ndh->target_address);
4870 { /* found ip-mac entry, generate eighbor advertisement response */
4872 vlib_node_runtime_t *error_node =
4873 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
4874 ip->dst_address = ip->src_address;
4875 ip->src_address = ndh->target_address;
4876 ip->hop_limit = 255;
4878 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
4879 clib_memcpy (opt->ethernet_address, macp, 6);
4880 ndh->icmp.type = ICMP6_neighbor_advertisement;
4881 ndh->advertisement_flags = clib_host_to_net_u32
4882 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED |
4883 ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
4884 ndh->icmp.checksum = 0;
4885 ndh->icmp.checksum =
4886 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip, &bogus_length);
4887 clib_memcpy (eth->dst_address, eth->src_address, 6);
4888 clib_memcpy (eth->src_address, macp, 6);
4889 vlib_error_count (vm, error_node->node_index,
4890 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX, 1);
4900 ip6_neighbor_proxy_add_del (u32 sw_if_index, ip6_address_t * addr, u8 is_del)
4904 fib_prefix_t pfx = {
4906 .fp_proto = FIB_PROTOCOL_IP6,
4911 ip46_address_t nh = {
4915 fib_index = ip6_fib_table_get_index_for_sw_if_index (sw_if_index);
4917 if (~0 == fib_index)
4918 return VNET_API_ERROR_NO_SUCH_FIB;
4922 fib_table_entry_path_remove (fib_index,
4924 FIB_SOURCE_IP6_ND_PROXY,
4928 ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
4929 /* flush the ND cache of this address if it's there */
4930 vnet_unset_ip6_ethernet_neighbor (vlib_get_main (),
4931 sw_if_index, addr, NULL, 0);
4935 fib_table_entry_path_add (fib_index,
4937 FIB_SOURCE_IP6_ND_PROXY,
4938 FIB_ENTRY_FLAG_NONE,
4942 ~0, 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
4947 static clib_error_t *
4948 set_ip6_nd_proxy_cmd (vlib_main_t * vm,
4949 unformat_input_t * input, vlib_cli_command_t * cmd)
4951 vnet_main_t *vnm = vnet_get_main ();
4952 clib_error_t *error = 0;
4957 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4959 /* get the rest of the command */
4960 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
4962 if (unformat (input, "%U", unformat_ip6_address, &addr))
4964 else if (unformat (input, "delete") || unformat (input, "del"))
4967 return (unformat_parse_error (input));
4971 ip6_neighbor_proxy_add_del (sw_if_index, &addr, is_del);
4977 VLIB_CLI_COMMAND (set_ip6_nd_proxy_command, static) =
4979 .path = "set ip6 nd proxy",
4980 .short_help = "set ip6 nd proxy <HOST> <INTERFACE>",
4981 .function = set_ip6_nd_proxy_cmd,
4986 ethernet_ndp_change_mac (u32 sw_if_index)
4988 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4993 pool_foreach (n, nm->neighbor_pool,
4995 if (n->key.sw_if_index == sw_if_index)
4997 adj_nbr_walk_nh6 (sw_if_index,
4998 &n->key.ip6_address,
4999 ip6_nd_mk_complete_walk, n);
5004 ai = adj_glean_get (FIB_PROTOCOL_IP6, sw_if_index);
5006 if (ADJ_INDEX_INVALID != ai)
5007 adj_glean_update_rewrite (ai);
5011 send_ip6_na (vlib_main_t * vm, u32 sw_if_index)
5013 ip6_main_t *i6m = &ip6_main;
5014 ip6_address_t *ip6_addr = ip6_interface_first_address (i6m, sw_if_index);
5016 send_ip6_na_w_addr (vm, ip6_addr, sw_if_index);
5020 send_ip6_na_w_addr (vlib_main_t * vm,
5021 const ip6_address_t * ip6_addr, u32 sw_if_index)
5023 ip6_main_t *i6m = &ip6_main;
5024 vnet_main_t *vnm = vnet_get_main ();
5025 u8 *rewrite, rewrite_len;
5026 vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
5032 ("Sending unsolicitated NA IP6 address %U on sw_if_idex %d",
5033 format_ip6_address, ip6_addr, sw_if_index);
5035 /* Form unsolicited neighbor advertisement packet from NS pkt template */
5038 icmp6_neighbor_solicitation_header_t *h =
5039 vlib_packet_template_get_packet (vm,
5040 &i6m->discover_neighbor_packet_template,
5045 ip6_set_reserved_multicast_address (&h->ip.dst_address,
5046 IP6_MULTICAST_SCOPE_link_local,
5047 IP6_MULTICAST_GROUP_ID_all_hosts);
5048 h->ip.src_address = ip6_addr[0];
5049 h->neighbor.icmp.type = ICMP6_neighbor_advertisement;
5050 h->neighbor.target_address = ip6_addr[0];
5051 h->neighbor.advertisement_flags = clib_host_to_net_u32
5052 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
5053 clib_memcpy (h->link_layer_option.ethernet_address,
5054 hi->hw_address, vec_len (hi->hw_address));
5055 h->neighbor.icmp.checksum =
5056 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
5057 ASSERT (bogus_length == 0);
5059 /* Setup MAC header with IP6 Etype and mcast DMAC */
5060 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
5061 ip6_multicast_ethernet_address (dst_address,
5062 IP6_MULTICAST_GROUP_ID_all_hosts);
5064 ethernet_build_rewrite (vnm, sw_if_index, VNET_LINK_IP6, dst_address);
5065 rewrite_len = vec_len (rewrite);
5066 vlib_buffer_advance (b, -rewrite_len);
5067 ethernet_header_t *e = vlib_buffer_get_current (b);
5068 clib_memcpy (e->dst_address, rewrite, rewrite_len);
5071 /* Send unsolicited ND advertisement packet out the specified interface */
5072 vnet_buffer (b)->sw_if_index[VLIB_RX] =
5073 vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
5074 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
5075 u32 *to_next = vlib_frame_vector_args (f);
5078 vlib_put_frame_to_node (vm, hi->output_node_index, f);
5083 * fd.io coding-style-patch-verification: ON
5086 * eval: (c-set-style "gnu")