2 * ip/ip6_neighbor.c: IP6 neighbor handling
4 * Copyright (c) 2010 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
18 #include <vnet/ip/ip.h>
19 #include <vnet/ip/ip6_neighbor.h>
20 #include <vnet/ethernet/ethernet.h>
21 #include <vppinfra/mhash.h>
22 #include <vppinfra/md5.h>
23 #include <vnet/adj/adj.h>
24 #include <vnet/adj/adj_mcast.h>
25 #include <vnet/fib/fib_table.h>
26 #include <vnet/fib/ip6_fib.h>
27 #include <vnet/mfib/ip6_mfib.h>
31 * @brief IPv6 Neighbor Adjacency and Neighbor Discovery.
33 * The files contains the API and CLI code for managing IPv6 neighbor
34 * adjacency tables and neighbor discovery logic.
37 /* can't use sizeof link_layer_address, that's 8 */
38 #define ETHER_MAC_ADDR_LEN 6
40 /* advertised prefix option */
43 /* basic advertised information */
47 int adv_autonomous_flag;
48 u32 adv_valid_lifetime_in_secs;
49 u32 adv_pref_lifetime_in_secs;
51 /* advertised values are computed from these times if decrementing */
52 f64 valid_lifetime_expires;
53 f64 pref_lifetime_expires;
55 /* local information */
57 int deprecated_prefix_flag;
58 int decrement_lifetime_flag;
60 #define MIN_ADV_VALID_LIFETIME 7203 /* seconds */
61 #define DEF_ADV_VALID_LIFETIME 2592000
62 #define DEF_ADV_PREF_LIFETIME 604800
64 /* extensions are added here, mobile, DNS etc.. */
70 /* group information */
72 ip6_address_t mcast_address;
74 ip6_address_t *mcast_source_address_pool;
77 /* configured router advertisement information per ipv6 interface */
81 /* advertised config information, zero means unspecified */
85 u16 adv_router_lifetime_in_sec;
86 u32 adv_neighbor_reachable_time_in_msec;
87 u32 adv_time_in_msec_between_retransmitted_neighbor_solicitations;
92 /* source link layer option */
93 u8 link_layer_address[8];
94 u8 link_layer_addr_len;
97 ip6_radv_prefix_t *adv_prefixes_pool;
99 /* Hash table mapping address to index in interface advertised prefix pool. */
100 mhash_t address_to_prefix_index;
102 /* MLDP group information */
103 ip6_mldp_group_t *mldp_group_pool;
105 /* Hash table mapping address to index in mldp address pool. */
106 mhash_t address_to_mldp_index;
108 /* local information */
110 int send_radv; /* radv on/off on this interface - set by config */
111 int cease_radv; /* we are ceasing to send - set byf config */
113 int adv_link_layer_address;
115 int failed_device_check;
116 int all_routers_mcast;
120 adj_index_t mcast_adj_index;
122 /* timing information */
123 #define DEF_MAX_RADV_INTERVAL 200
124 #define DEF_MIN_RADV_INTERVAL .75 * DEF_MAX_RADV_INTERVAL
125 #define DEF_CURR_HOP_LIMIT 64
126 #define DEF_DEF_RTR_LIFETIME 3 * DEF_MAX_RADV_INTERVAL
127 #define MAX_DEF_RTR_LIFETIME 9000
129 #define MAX_INITIAL_RTR_ADVERT_INTERVAL 16 /* seconds */
130 #define MAX_INITIAL_RTR_ADVERTISEMENTS 3 /*transmissions */
131 #define MIN_DELAY_BETWEEN_RAS 3 /* seconds */
132 #define MAX_DELAY_BETWEEN_RAS 1800 /* seconds */
133 #define MAX_RA_DELAY_TIME .5 /* seconds */
135 f64 max_radv_interval;
136 f64 min_radv_interval;
137 f64 min_delay_between_radv;
138 f64 max_delay_between_radv;
139 f64 max_rtr_default_lifetime;
142 f64 last_multicast_time;
143 f64 next_multicast_time;
146 u32 initial_adverts_count;
147 f64 initial_adverts_interval;
148 u32 initial_adverts_sent;
151 u32 n_advertisements_sent;
152 u32 n_solicitations_rcvd;
153 u32 n_solicitations_dropped;
155 /* Link local address to use (defaults to underlying physical for logical interfaces */
156 ip6_address_t link_local_address;
165 /* Used for nd event notification only */
168 } pending_resolution_t;
173 /* Hash tables mapping name to opcode. */
174 uword *opcode_by_name;
176 /* lite beer "glean" adjacency handling */
177 mhash_t pending_resolutions_by_address;
178 pending_resolution_t *pending_resolutions;
180 /* Mac address change notification */
181 mhash_t mac_changes_by_address;
182 pending_resolution_t *mac_changes;
184 u32 *neighbor_input_next_index_by_hw_if_index;
186 ip6_neighbor_t *neighbor_pool;
188 mhash_t neighbor_index_by_key;
190 u32 *if_radv_pool_index_by_sw_if_index;
192 ip6_radv_t *if_radv_pool;
194 /* Neighbor attack mitigation */
195 u32 limit_neighbor_cache_size;
196 u32 neighbor_delete_rotor;
198 } ip6_neighbor_main_t;
200 /* ipv6 neighbor discovery - timer/event types */
204 } ip6_icmp_neighbor_discovery_event_type_t;
214 } ip6_icmp_neighbor_discovery_event_data_t;
216 static ip6_neighbor_main_t ip6_neighbor_main;
217 static ip6_address_t ip6a_zero; /* ip6 address 0 */
220 format_ip6_neighbor_ip6_entry (u8 * s, va_list * va)
222 vlib_main_t *vm = va_arg (*va, vlib_main_t *);
223 ip6_neighbor_t *n = va_arg (*va, ip6_neighbor_t *);
224 vnet_main_t *vnm = vnet_get_main ();
225 vnet_sw_interface_t *si;
229 return format (s, "%=12s%=20s%=6s%=20s%=40s", "Time", "Address", "Flags",
230 "Link layer", "Interface");
232 if (n->flags & IP6_NEIGHBOR_FLAG_DYNAMIC)
233 flags = format (flags, "D");
235 if (n->flags & IP6_NEIGHBOR_FLAG_STATIC)
236 flags = format (flags, "S");
238 if (n->flags & IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY)
239 flags = format (flags, "N");
241 si = vnet_get_sw_interface (vnm, n->key.sw_if_index);
242 s = format (s, "%=12U%=20U%=6s%=20U%=40U",
243 format_vlib_cpu_time, vm, n->cpu_time_last_updated,
244 format_ip6_address, &n->key.ip6_address,
245 flags ? (char *) flags : "",
246 format_ethernet_address, n->link_layer_address,
247 format_vnet_sw_interface_name, vnm, si);
253 static clib_error_t *
254 ip6_neighbor_sw_interface_up_down (vnet_main_t * vnm,
255 u32 sw_if_index, u32 flags)
257 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
260 if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
262 u32 i, *to_delete = 0;
265 pool_foreach (n, nm->neighbor_pool,
267 if (n->key.sw_if_index == sw_if_index)
268 vec_add1 (to_delete, n - nm->neighbor_pool);
272 for (i = 0; i < vec_len (to_delete); i++)
274 n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
275 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
276 fib_table_entry_delete_index (n->fib_entry_index, FIB_SOURCE_ADJ);
277 pool_put (nm->neighbor_pool, n);
280 vec_free (to_delete);
286 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_neighbor_sw_interface_up_down);
289 unset_random_neighbor_entry (void)
291 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
292 vnet_main_t *vnm = vnet_get_main ();
293 vlib_main_t *vm = vnm->vlib_main;
297 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
298 nm->neighbor_delete_rotor = index;
300 /* Try again from elt 0, could happen if an intfc goes down */
303 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
304 nm->neighbor_delete_rotor = index;
307 /* Nothing left in the pool */
311 e = pool_elt_at_index (nm->neighbor_pool, index);
313 vnet_unset_ip6_ethernet_neighbor (vm, e->key.sw_if_index,
315 e->link_layer_address,
324 u8 link_layer_address[6];
327 } ip6_neighbor_set_unset_rpc_args_t;
329 static void ip6_neighbor_set_unset_rpc_callback
330 (ip6_neighbor_set_unset_rpc_args_t * a);
332 static void set_unset_ip6_neighbor_rpc
335 ip6_address_t * a, u8 * link_layer_address, int is_add, int is_static,
338 ip6_neighbor_set_unset_rpc_args_t args;
339 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
341 args.sw_if_index = sw_if_index;
342 args.is_add = is_add;
343 args.is_static = is_static;
344 args.is_no_fib_entry = is_no_fib_entry;
345 clib_memcpy (&args.addr, a, sizeof (*a));
346 if (NULL != link_layer_address)
347 clib_memcpy (args.link_layer_address, link_layer_address, 6);
349 vl_api_rpc_call_main_thread (ip6_neighbor_set_unset_rpc_callback,
350 (u8 *) & args, sizeof (args));
354 ip6_nbr_probe (ip_adjacency_t * adj)
356 icmp6_neighbor_solicitation_header_t *h;
357 vnet_main_t *vnm = vnet_get_main ();
358 ip6_main_t *im = &ip6_main;
359 ip_interface_address_t *ia;
360 ip6_address_t *dst, *src;
361 vnet_hw_interface_t *hi;
362 vnet_sw_interface_t *si;
368 vm = vlib_get_main ();
370 si = vnet_get_sw_interface (vnm, adj->rewrite_header.sw_if_index);
371 dst = &adj->sub_type.nbr.next_hop.ip6;
373 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
377 src = ip6_interface_address_matching_destination (im, dst,
385 h = vlib_packet_template_get_packet (vm,
386 &im->discover_neighbor_packet_template,
389 hi = vnet_get_sup_hw_interface (vnm, adj->rewrite_header.sw_if_index);
391 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
392 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
393 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
394 h->ip.src_address = src[0];
395 h->neighbor.target_address = dst[0];
397 clib_memcpy (h->link_layer_option.ethernet_address,
398 hi->hw_address, vec_len (hi->hw_address));
400 h->neighbor.icmp.checksum =
401 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
402 ASSERT (bogus_length == 0);
404 b = vlib_get_buffer (vm, bi);
405 vnet_buffer (b)->sw_if_index[VLIB_RX] =
406 vnet_buffer (b)->sw_if_index[VLIB_TX] = adj->rewrite_header.sw_if_index;
408 /* Add encapsulation string for software interface (e.g. ethernet header). */
409 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
410 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
413 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
414 u32 *to_next = vlib_frame_vector_args (f);
417 vlib_put_frame_to_node (vm, hi->output_node_index, f);
422 ip6_nd_mk_complete (adj_index_t ai, ip6_neighbor_t * nbr)
424 adj_nbr_update_rewrite (ai, ADJ_NBR_REWRITE_FLAG_COMPLETE,
425 ethernet_build_rewrite (vnet_get_main (),
426 nbr->key.sw_if_index,
427 adj_get_link_type (ai),
428 nbr->link_layer_address));
432 ip6_nd_mk_incomplete (adj_index_t ai)
434 ip_adjacency_t *adj = adj_get (ai);
436 adj_nbr_update_rewrite (ai,
437 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
438 ethernet_build_rewrite (vnet_get_main (),
441 adj_get_link_type (ai),
442 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
445 #define IP6_NBR_MK_KEY(k, sw_if_index, addr) \
447 k.sw_if_index = sw_if_index; \
448 k.ip6_address = *addr; \
452 static ip6_neighbor_t *
453 ip6_nd_find (u32 sw_if_index, const ip6_address_t * addr)
455 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
456 ip6_neighbor_t *n = NULL;
457 ip6_neighbor_key_t k;
460 IP6_NBR_MK_KEY (k, sw_if_index, addr);
462 p = mhash_get (&nm->neighbor_index_by_key, &k);
465 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
472 ip6_nd_mk_complete_walk (adj_index_t ai, void *ctx)
474 ip6_neighbor_t *nbr = ctx;
476 ip6_nd_mk_complete (ai, nbr);
478 return (ADJ_WALK_RC_CONTINUE);
482 ip6_nd_mk_incomplete_walk (adj_index_t ai, void *ctx)
484 ip6_nd_mk_incomplete (ai);
486 return (ADJ_WALK_RC_CONTINUE);
490 ip6_ethernet_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
497 nbr = ip6_nd_find (sw_if_index, &adj->sub_type.nbr.next_hop.ip6);
499 switch (adj->lookup_next_index)
501 case IP_LOOKUP_NEXT_ARP:
502 case IP_LOOKUP_NEXT_GLEAN:
505 adj_nbr_walk_nh6 (sw_if_index, &nbr->key.ip6_address,
506 ip6_nd_mk_complete_walk, nbr);
511 * no matching ND entry.
512 * construct the rewrite required to for an ND packet, and stick
513 * that in the adj's pipe to smoke.
515 adj_nbr_update_rewrite (ai,
516 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
517 ethernet_build_rewrite (vnm,
520 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
523 * since the FIB has added this adj for a route, it makes sense it may
524 * want to forward traffic sometime soon. Let's send a speculative ND.
525 * just one. If we were to do periodically that wouldn't be bad either,
526 * but that's more code than i'm prepared to write at this time for
527 * relatively little reward.
532 case IP_LOOKUP_NEXT_MCAST:
534 * Construct a partial rewrite from the known ethernet mcast dest MAC
536 adj_mcast_update_rewrite
538 ethernet_build_rewrite (vnm,
541 ethernet_ip6_mcast_dst_addr ()));
544 * Complete the remaining fields of the adj's rewrite to direct the
545 * complete of the rewrite at switch time by copying in the IP
546 * dst address's bytes.
547 * Ofset is 12 bytes from the end of the MAC header - which is 2
548 * bytes into the desintation address. And we write 4 bytes.
550 adj->rewrite_header.dst_mcast_offset = 12;
551 adj->rewrite_header.dst_mcast_n_bytes = 4;
555 case IP_LOOKUP_NEXT_DROP:
556 case IP_LOOKUP_NEXT_PUNT:
557 case IP_LOOKUP_NEXT_LOCAL:
558 case IP_LOOKUP_NEXT_REWRITE:
559 case IP_LOOKUP_NEXT_LOAD_BALANCE:
560 case IP_LOOKUP_NEXT_MIDCHAIN:
561 case IP_LOOKUP_NEXT_ICMP_ERROR:
562 case IP_LOOKUP_N_NEXT:
569 vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
572 u8 * link_layer_address,
573 uword n_bytes_link_layer_address,
574 int is_static, int is_no_fib_entry)
576 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
577 ip6_neighbor_key_t k;
578 ip6_neighbor_t *n = 0;
579 int make_new_nd_cache_entry = 1;
582 pending_resolution_t *pr, *mc;
584 if (os_get_cpu_number ())
586 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
587 1 /* set new neighbor */ , is_static,
592 k.sw_if_index = sw_if_index;
593 k.ip6_address = a[0];
596 p = mhash_get (&nm->neighbor_index_by_key, &k);
599 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
600 /* Refuse to over-write static neighbor entry. */
601 if (!is_static && (n->flags & IP6_NEIGHBOR_FLAG_STATIC))
603 make_new_nd_cache_entry = 0;
606 if (make_new_nd_cache_entry)
608 pool_get (nm->neighbor_pool, n);
609 mhash_set (&nm->neighbor_index_by_key, &k, n - nm->neighbor_pool,
613 clib_memcpy (n->link_layer_address,
614 link_layer_address, n_bytes_link_layer_address);
617 * create the adj-fib. the entry in the FIB table for and to the peer.
619 if (!is_no_fib_entry)
623 .fp_proto = FIB_PROTOCOL_IP6,
624 .fp_addr.ip6 = k.ip6_address,
628 fib_index = ip6_main.fib_index_by_sw_if_index[n->key.sw_if_index];
630 fib_table_entry_update_one_path (fib_index, &pfx,
633 FIB_PROTOCOL_IP6, &pfx.fp_addr,
634 n->key.sw_if_index, ~0, 1, NULL,
635 FIB_ROUTE_PATH_FLAG_NONE);
636 n->flags |= IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY;
642 * prevent a DoS attack from the data-plane that
643 * spams us with no-op updates to the MAC address
645 if (0 == memcmp (n->link_layer_address,
646 link_layer_address, n_bytes_link_layer_address))
649 clib_memcpy (n->link_layer_address,
650 link_layer_address, n_bytes_link_layer_address);
653 /* Update time stamp and flags. */
654 n->cpu_time_last_updated = clib_cpu_time_now ();
656 n->flags |= IP6_NEIGHBOR_FLAG_STATIC;
658 n->flags |= IP6_NEIGHBOR_FLAG_DYNAMIC;
660 adj_nbr_walk_nh6 (sw_if_index,
661 &n->key.ip6_address, ip6_nd_mk_complete_walk, n);
663 /* Customer(s) waiting for this address to be resolved? */
664 p = mhash_get (&nm->pending_resolutions_by_address, a);
669 while (next_index != (u32) ~ 0)
671 pr = pool_elt_at_index (nm->pending_resolutions, next_index);
672 vlib_process_signal_event (vm, pr->node_index,
673 pr->type_opaque, pr->data);
674 next_index = pr->next_index;
675 pool_put (nm->pending_resolutions, pr);
678 mhash_unset (&nm->pending_resolutions_by_address, a, 0);
681 /* Customer(s) requesting ND event for this address? */
682 p = mhash_get (&nm->mac_changes_by_address, a);
687 while (next_index != (u32) ~ 0)
689 int (*fp) (u32, u8 *, u32, ip6_address_t *);
691 mc = pool_elt_at_index (nm->mac_changes, next_index);
692 fp = mc->data_callback;
694 /* Call the user's data callback, return 1 to suppress dup events */
697 (*fp) (mc->data, link_layer_address, sw_if_index, &ip6a_zero);
699 * Signal the resolver process, as long as the user
700 * says they want to be notified
703 vlib_process_signal_event (vm, mc->node_index,
704 mc->type_opaque, mc->data);
705 next_index = mc->next_index;
713 vnet_unset_ip6_ethernet_neighbor (vlib_main_t * vm,
716 u8 * link_layer_address,
717 uword n_bytes_link_layer_address)
719 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
720 ip6_neighbor_key_t k;
725 if (os_get_cpu_number ())
727 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
728 0 /* unset */ , 0, 0);
732 k.sw_if_index = sw_if_index;
733 k.ip6_address = a[0];
736 p = mhash_get (&nm->neighbor_index_by_key, &k);
743 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
744 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
746 adj_nbr_walk_nh6 (sw_if_index,
747 &n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL);
749 fib_table_entry_delete_index (n->fib_entry_index, FIB_SOURCE_ADJ);
750 pool_put (nm->neighbor_pool, n);
756 static void ip6_neighbor_set_unset_rpc_callback
757 (ip6_neighbor_set_unset_rpc_args_t * a)
759 vlib_main_t *vm = vlib_get_main ();
761 vnet_set_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
762 a->link_layer_address, 6, a->is_static,
765 vnet_unset_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
766 a->link_layer_address, 6);
770 ip6_neighbor_sort (void *a1, void *a2)
772 vnet_main_t *vnm = vnet_get_main ();
773 ip6_neighbor_t *n1 = a1, *n2 = a2;
775 cmp = vnet_sw_interface_compare (vnm, n1->key.sw_if_index,
776 n2->key.sw_if_index);
778 cmp = ip6_address_compare (&n1->key.ip6_address, &n2->key.ip6_address);
783 ip6_neighbors_entries (u32 sw_if_index)
785 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
786 ip6_neighbor_t *n, *ns = 0;
789 pool_foreach (n, nm->neighbor_pool,
791 if (sw_if_index != ~0 && n->key.sw_if_index != sw_if_index)
798 vec_sort_with_function (ns, ip6_neighbor_sort);
802 static clib_error_t *
803 show_ip6_neighbors (vlib_main_t * vm,
804 unformat_input_t * input, vlib_cli_command_t * cmd)
806 vnet_main_t *vnm = vnet_get_main ();
807 ip6_neighbor_t *n, *ns;
808 clib_error_t *error = 0;
811 /* Filter entries by interface if given. */
813 (void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index);
815 ns = ip6_neighbors_entries (sw_if_index);
818 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, 0);
821 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, n);
830 * This command is used to display the adjacent IPv6 hosts found via
831 * neighbor discovery. Optionally, limit the output to the specified
835 * Example of how to display the IPv6 neighbor adjacency table:
836 * @cliexstart{show ip6 neighbors}
837 * Time Address Flags Link layer Interface
838 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
839 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
840 * 886.6654 ::1:1:c:0:9 S 02:fe:e4:45:27:5b GigabitEthernet3/0/0
842 * Example of how to display the IPv6 neighbor adjacency table for given interface:
843 * @cliexstart{show ip6 neighbors GigabitEthernet2/0/0}
844 * Time Address Flags Link layer Interface
845 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
846 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
850 VLIB_CLI_COMMAND (show_ip6_neighbors_command, static) = {
851 .path = "show ip6 neighbors",
852 .function = show_ip6_neighbors,
853 .short_help = "show ip6 neighbors [<interface>]",
857 static clib_error_t *
858 set_ip6_neighbor (vlib_main_t * vm,
859 unformat_input_t * input, vlib_cli_command_t * cmd)
861 vnet_main_t *vnm = vnet_get_main ();
867 int is_no_fib_entry = 0;
870 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
872 /* intfc, ip6-address, mac-address */
873 if (unformat (input, "%U %U %U",
874 unformat_vnet_sw_interface, vnm, &sw_if_index,
875 unformat_ip6_address, &addr,
876 unformat_ethernet_address, mac_address))
879 else if (unformat (input, "delete") || unformat (input, "del"))
881 else if (unformat (input, "static"))
883 else if (unformat (input, "no-fib-entry"))
890 return clib_error_return (0, "Missing interface, ip6 or hw address");
893 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
894 mac_address, sizeof (mac_address),
895 is_static, is_no_fib_entry);
897 vnet_unset_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
898 mac_address, sizeof (mac_address));
903 * This command is used to manually add an entry to the IPv6 neighbor
904 * adjacency table. Optionally, the entry can be added as static. It is
905 * also used to remove an entry from the table. Use the '<em>show ip6
906 * neighbors</em>' command to display all learned and manually entered entries.
909 * Example of how to add a static entry to the IPv6 neighbor adjacency table:
910 * @cliexcmd{set ip6 neighbor GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b static}
911 * Example of how to delete an entry from the IPv6 neighbor adjacency table:
912 * @cliexcmd{set ip6 neighbor del GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b}
915 VLIB_CLI_COMMAND (set_ip6_neighbor_command, static) =
917 .path = "set ip6 neighbor",
918 .function = set_ip6_neighbor,
919 .short_help = "set ip6 neighbor [del] <interface> <ip6-address> <mac-address> [static]",
925 ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP,
926 ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY,
927 ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
928 } icmp6_neighbor_solicitation_or_advertisement_next_t;
930 static_always_inline uword
931 icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
932 vlib_node_runtime_t * node,
933 vlib_frame_t * frame,
934 uword is_solicitation)
936 vnet_main_t *vnm = vnet_get_main ();
937 ip6_main_t *im = &ip6_main;
938 uword n_packets = frame->n_vectors;
940 u32 n_left_from, n_left_to_next, next_index, n_advertisements_sent;
941 icmp6_neighbor_discovery_option_type_t option_type;
942 vlib_node_runtime_t *error_node =
943 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
946 from = vlib_frame_vector_args (frame);
947 n_left_from = n_packets;
948 next_index = node->cached_next_index;
950 if (node->flags & VLIB_NODE_FLAG_TRACE)
951 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
953 sizeof (icmp6_input_trace_t));
957 ? ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address
958 : ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address);
959 n_advertisements_sent = 0;
961 while (n_left_from > 0)
963 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
965 while (n_left_from > 0 && n_left_to_next > 0)
969 icmp6_neighbor_solicitation_or_advertisement_header_t *h0;
970 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
971 u32 bi0, options_len0, sw_if_index0, next0, error0;
972 u32 ip6_sadd_link_local, ip6_sadd_unspecified;
976 bi0 = to_next[0] = from[0];
983 p0 = vlib_get_buffer (vm, bi0);
984 ip0 = vlib_buffer_get_current (p0);
985 h0 = ip6_next_header (ip0);
987 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
989 error0 = ICMP6_ERROR_NONE;
990 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
991 ip6_sadd_link_local =
992 ip6_address_is_link_local_unicast (&ip0->src_address);
993 ip6_sadd_unspecified =
994 ip6_address_is_unspecified (&ip0->src_address);
996 /* Check that source address is unspecified, link-local or else on-link. */
997 if (!ip6_sadd_unspecified && !ip6_sadd_link_local)
999 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1001 if (ADJ_INDEX_INVALID != src_adj_index0)
1003 ip_adjacency_t *adj0 =
1004 ip_get_adjacency (&im->lookup_main, src_adj_index0);
1006 /* Allow all realistic-looking rewrite adjacencies to pass */
1007 ni0 = adj0->lookup_next_index;
1008 is_rewrite0 = (ni0 >= IP_LOOKUP_NEXT_ARP) &&
1009 (ni0 < IP6_LOOKUP_N_NEXT);
1011 error0 = ((adj0->rewrite_header.sw_if_index != sw_if_index0
1014 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK
1020 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK;
1024 o0 = (void *) (h0 + 1);
1025 o0 = ((options_len0 == 8 && o0->header.type == option_type
1026 && o0->header.n_data_u64s == 1) ? o0 : 0);
1028 /* If src address unspecified or link local, donot learn neighbor MAC */
1029 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1030 !ip6_sadd_unspecified && !ip6_sadd_link_local))
1032 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1033 if (nm->limit_neighbor_cache_size &&
1034 pool_elts (nm->neighbor_pool) >=
1035 nm->limit_neighbor_cache_size)
1036 unset_random_neighbor_entry ();
1037 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1040 &h0->target_address,
1041 o0->ethernet_address,
1042 sizeof (o0->ethernet_address),
1046 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1048 /* Check that target address is local to this router. */
1049 fib_node_index_t fei;
1053 ip6_fib_table_get_index_for_sw_if_index (sw_if_index0);
1055 if (~0 == fib_index)
1057 error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1061 fei = ip6_fib_table_lookup_exact_match (fib_index,
1062 &h0->target_address,
1065 if (FIB_NODE_INDEX_INVALID == fei)
1067 /* The target address is not in the FIB */
1069 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1073 if (FIB_ENTRY_FLAG_LOCAL &
1074 fib_entry_get_flags_for_source (fei,
1075 FIB_SOURCE_INTERFACE))
1077 /* It's an address that belongs to one of our interfaces
1081 if (fib_entry_is_sourced
1082 (fei, FIB_SOURCE_IP6_ND_PROXY))
1084 /* The address was added by IPv6 Proxy ND config.
1085 * We should only respond to these if the NS arrived on
1086 * the link that has a matching covering prefix */
1091 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1097 if (is_solicitation)
1098 next0 = (error0 != ICMP6_ERROR_NONE
1099 ? ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP
1100 : ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY);
1104 error0 = error0 == ICMP6_ERROR_NONE ?
1105 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_RX : error0;
1108 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1110 vnet_sw_interface_t *sw_if0;
1111 ethernet_interface_t *eth_if0;
1112 ethernet_header_t *eth0;
1114 /* dst address is either source address or the all-nodes mcast addr */
1115 if (!ip6_sadd_unspecified)
1116 ip0->dst_address = ip0->src_address;
1118 ip6_set_reserved_multicast_address (&ip0->dst_address,
1119 IP6_MULTICAST_SCOPE_link_local,
1120 IP6_MULTICAST_GROUP_ID_all_hosts);
1122 ip0->src_address = h0->target_address;
1123 ip0->hop_limit = 255;
1124 h0->icmp.type = ICMP6_neighbor_advertisement;
1126 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1127 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1129 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1132 clib_memcpy (o0->ethernet_address, eth_if0->address, 6);
1134 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
1137 h0->advertisement_flags = clib_host_to_net_u32
1138 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED
1139 | ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
1141 h0->icmp.checksum = 0;
1143 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1145 ASSERT (bogus_length == 0);
1147 /* Reuse current MAC header, copy SMAC to DMAC and
1148 * interface MAC to SMAC */
1149 vlib_buffer_advance (p0, -ethernet_buffer_header_size (p0));
1150 eth0 = vlib_buffer_get_current (p0);
1151 clib_memcpy (eth0->dst_address, eth0->src_address, 6);
1153 clib_memcpy (eth0->src_address, eth_if0->address, 6);
1155 /* Setup input and output sw_if_index for packet */
1156 ASSERT (vnet_buffer (p0)->sw_if_index[VLIB_RX] == sw_if_index0);
1157 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1158 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1159 vnet_main.local_interface_sw_if_index;
1161 n_advertisements_sent++;
1164 p0->error = error_node->errors[error0];
1166 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1167 to_next, n_left_to_next,
1171 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1174 /* Account for advertisements sent. */
1175 vlib_error_count (vm, error_node->node_index,
1176 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX,
1177 n_advertisements_sent);
1179 return frame->n_vectors;
1182 /* for "syslogging" - use elog for now */
1183 #define foreach_log_level \
1184 _ (DEBUG, "DEBUG") \
1185 _ (INFO, "INFORMATION") \
1186 _ (NOTICE, "NOTICE") \
1187 _ (WARNING, "WARNING") \
1189 _ (CRIT, "CRITICAL") \
1190 _ (ALERT, "ALERT") \
1191 _ (EMERG, "EMERGENCY")
1195 #define _(f,s) LOG_##f,
1200 static char *log_level_strings[] = {
1206 static int logmask = 1 << LOG_DEBUG;
1209 ip6_neighbor_syslog (vlib_main_t * vm, int priority, char *fmt, ...)
1211 /* just use elog for now */
1215 if ((priority > LOG_EMERG) || !(logmask & (1 << priority)))
1221 what = va_format (0, fmt, &va);
1223 ELOG_TYPE_DECLARE (e) =
1225 .format = "ip6 nd: (%s): %s",.format_args = "T4T4",};
1230 ed = ELOG_DATA (&vm->elog_main, e);
1231 ed->s[0] = elog_string (&vm->elog_main, log_level_strings[priority]);
1232 ed->s[1] = elog_string (&vm->elog_main, (char *) what);
1238 /* ipv6 neighbor discovery - router advertisements */
1241 ICMP6_ROUTER_SOLICITATION_NEXT_DROP,
1242 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW,
1243 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX,
1244 ICMP6_ROUTER_SOLICITATION_N_NEXT,
1245 } icmp6_router_solicitation_or_advertisement_next_t;
1247 static_always_inline uword
1248 icmp6_router_solicitation (vlib_main_t * vm,
1249 vlib_node_runtime_t * node, vlib_frame_t * frame)
1251 vnet_main_t *vnm = vnet_get_main ();
1252 ip6_main_t *im = &ip6_main;
1253 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1254 uword n_packets = frame->n_vectors;
1255 u32 *from, *to_next;
1256 u32 n_left_from, n_left_to_next, next_index;
1257 u32 n_advertisements_sent = 0;
1260 icmp6_neighbor_discovery_option_type_t option_type;
1262 vlib_node_runtime_t *error_node =
1263 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1265 from = vlib_frame_vector_args (frame);
1266 n_left_from = n_packets;
1267 next_index = node->cached_next_index;
1269 if (node->flags & VLIB_NODE_FLAG_TRACE)
1270 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1272 sizeof (icmp6_input_trace_t));
1274 /* source may append his LL address */
1275 option_type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1277 while (n_left_from > 0)
1279 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1281 while (n_left_from > 0 && n_left_to_next > 0)
1285 ip6_radv_t *radv_info = 0;
1287 icmp6_neighbor_discovery_header_t *h0;
1288 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1290 u32 bi0, options_len0, sw_if_index0, next0, error0;
1291 u32 is_solicitation = 1, is_dropped = 0;
1292 u32 is_unspecified, is_link_local;
1294 bi0 = to_next[0] = from[0];
1299 n_left_to_next -= 1;
1301 p0 = vlib_get_buffer (vm, bi0);
1302 ip0 = vlib_buffer_get_current (p0);
1303 h0 = ip6_next_header (ip0);
1305 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1306 is_unspecified = ip6_address_is_unspecified (&ip0->src_address);
1308 ip6_address_is_link_local_unicast (&ip0->src_address);
1310 error0 = ICMP6_ERROR_NONE;
1311 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1313 /* check if solicitation (not from nd_timer node) */
1314 if (ip6_address_is_unspecified (&ip0->dst_address))
1315 is_solicitation = 0;
1317 /* Check that source address is unspecified, link-local or else on-link. */
1318 if (!is_unspecified && !is_link_local)
1320 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1322 if (ADJ_INDEX_INVALID != src_adj_index0)
1324 ip_adjacency_t *adj0 = ip_get_adjacency (&im->lookup_main,
1327 error0 = (adj0->rewrite_header.sw_if_index != sw_if_index0
1329 ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK
1334 error0 = ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK;
1338 /* check for source LL option and process */
1339 o0 = (void *) (h0 + 1);
1340 o0 = ((options_len0 == 8
1341 && o0->header.type == option_type
1342 && o0->header.n_data_u64s == 1) ? o0 : 0);
1344 /* if src address unspecified IGNORE any options */
1345 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1346 !is_unspecified && !is_link_local))
1348 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1349 if (nm->limit_neighbor_cache_size &&
1350 pool_elts (nm->neighbor_pool) >=
1351 nm->limit_neighbor_cache_size)
1352 unset_random_neighbor_entry ();
1354 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1356 o0->ethernet_address,
1357 sizeof (o0->ethernet_address),
1361 /* default is to drop */
1362 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1364 if (error0 == ICMP6_ERROR_NONE)
1366 vnet_sw_interface_t *sw_if0;
1367 ethernet_interface_t *eth_if0;
1370 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1371 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1373 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1375 /* only support ethernet interface type for now */
1377 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1380 if (error0 == ICMP6_ERROR_NONE)
1384 /* adjust the sizeof the buffer to just include the ipv6 header */
1385 p0->current_length -=
1387 sizeof (icmp6_neighbor_discovery_header_t));
1389 /* look up the radv_t information for this interface */
1390 vec_validate_init_empty
1391 (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
1393 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1396 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1400 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1403 if (error0 == ICMP6_ERROR_NONE)
1405 f64 now = vlib_time_now (vm);
1407 /* for solicited adverts - need to rate limit */
1408 if (is_solicitation)
1410 if (0 != radv_info->last_radv_time &&
1411 (now - radv_info->last_radv_time) <
1412 MIN_DELAY_BETWEEN_RAS)
1415 radv_info->last_radv_time = now;
1419 icmp6_router_advertisement_header_t rh;
1421 rh.icmp.type = ICMP6_router_advertisement;
1423 rh.icmp.checksum = 0;
1425 rh.current_hop_limit = radv_info->curr_hop_limit;
1426 rh.router_lifetime_in_sec =
1427 clib_host_to_net_u16
1428 (radv_info->adv_router_lifetime_in_sec);
1430 time_in_msec_between_retransmitted_neighbor_solicitations
1432 clib_host_to_net_u32 (radv_info->
1433 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
1434 rh.neighbor_reachable_time_in_msec =
1435 clib_host_to_net_u32 (radv_info->
1436 adv_neighbor_reachable_time_in_msec);
1439 (radv_info->adv_managed_flag) ?
1440 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP :
1443 ((radv_info->adv_other_flag) ?
1444 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP :
1448 u16 payload_length =
1449 sizeof (icmp6_router_advertisement_header_t);
1451 vlib_buffer_add_data (vm,
1452 p0->free_list_index,
1456 (icmp6_router_advertisement_header_t));
1458 if (radv_info->adv_link_layer_address)
1460 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
1464 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1465 h.header.n_data_u64s = 1;
1467 /* copy ll address */
1468 clib_memcpy (&h.ethernet_address[0],
1469 eth_if0->address, 6);
1471 vlib_buffer_add_data (vm,
1472 p0->free_list_index,
1476 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t));
1480 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t);
1483 /* add MTU option */
1484 if (radv_info->adv_link_mtu)
1486 icmp6_neighbor_discovery_mtu_option_t h;
1490 clib_host_to_net_u32 (radv_info->adv_link_mtu);
1491 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu;
1492 h.header.n_data_u64s = 1;
1495 sizeof (icmp6_neighbor_discovery_mtu_option_t);
1497 vlib_buffer_add_data (vm,
1498 p0->free_list_index,
1502 (icmp6_neighbor_discovery_mtu_option_t));
1505 /* add advertised prefix options */
1506 ip6_radv_prefix_t *pr_info;
1509 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
1511 if(pr_info->enabled &&
1512 (!pr_info->decrement_lifetime_flag
1513 || (pr_info->pref_lifetime_expires >0)))
1515 /* advertise this prefix */
1516 icmp6_neighbor_discovery_prefix_information_option_t h;
1518 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information;
1519 h.header.n_data_u64s = (sizeof(icmp6_neighbor_discovery_prefix_information_option_t) >> 3);
1521 h.dst_address_length = pr_info->prefix_len;
1523 h.flags = (pr_info->adv_on_link_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_FLAG_ON_LINK : 0;
1524 h.flags |= (pr_info->adv_autonomous_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_AUTO : 0;
1526 if(radv_info->cease_radv && pr_info->deprecated_prefix_flag)
1528 h.valid_time = clib_host_to_net_u32(MIN_ADV_VALID_LIFETIME);
1529 h.preferred_time = 0;
1533 if(pr_info->decrement_lifetime_flag)
1535 pr_info->adv_valid_lifetime_in_secs = ((pr_info->valid_lifetime_expires > now)) ?
1536 (pr_info->valid_lifetime_expires - now) : 0;
1538 pr_info->adv_pref_lifetime_in_secs = ((pr_info->pref_lifetime_expires > now)) ?
1539 (pr_info->pref_lifetime_expires - now) : 0;
1542 h.valid_time = clib_host_to_net_u32(pr_info->adv_valid_lifetime_in_secs);
1543 h.preferred_time = clib_host_to_net_u32(pr_info->adv_pref_lifetime_in_secs) ;
1547 clib_memcpy(&h.dst_address, &pr_info->prefix, sizeof(ip6_address_t));
1549 payload_length += sizeof( icmp6_neighbor_discovery_prefix_information_option_t);
1551 vlib_buffer_add_data (vm,
1552 p0->free_list_index,
1554 (void *)&h, sizeof(icmp6_neighbor_discovery_prefix_information_option_t));
1560 /* add additional options before here */
1562 /* finish building the router advertisement... */
1563 if (!is_unspecified && radv_info->send_unicast)
1565 ip0->dst_address = ip0->src_address;
1569 /* target address is all-nodes mcast addr */
1570 ip6_set_reserved_multicast_address
1572 IP6_MULTICAST_SCOPE_link_local,
1573 IP6_MULTICAST_GROUP_ID_all_hosts);
1576 /* source address MUST be the link-local address */
1577 ip0->src_address = radv_info->link_local_address;
1579 ip0->hop_limit = 255;
1580 ip0->payload_length =
1581 clib_host_to_net_u16 (payload_length);
1583 icmp6_router_advertisement_header_t *rh0 =
1584 (icmp6_router_advertisement_header_t *) (ip0 + 1);
1585 rh0->icmp.checksum =
1586 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1588 ASSERT (bogus_length == 0);
1590 /* setup output if and adjacency */
1591 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1592 vnet_main.local_interface_sw_if_index;
1594 if (is_solicitation)
1596 ethernet_header_t *eth0;
1597 /* Reuse current MAC header, copy SMAC to DMAC and
1598 * interface MAC to SMAC */
1599 vlib_buffer_reset (p0);
1600 eth0 = vlib_buffer_get_current (p0);
1601 clib_memcpy (eth0->dst_address, eth0->src_address,
1603 clib_memcpy (eth0->src_address, eth_if0->address,
1606 is_dropped ? next0 :
1607 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX;
1608 vnet_buffer (p0)->sw_if_index[VLIB_TX] =
1613 adj_index0 = radv_info->mcast_adj_index;
1614 if (adj_index0 == 0)
1615 error0 = ICMP6_ERROR_DST_LOOKUP_MISS;
1619 is_dropped ? next0 :
1620 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW;
1621 vnet_buffer (p0)->ip.adj_index[VLIB_TX] =
1625 p0->flags |= VNET_BUFFER_LOCALLY_ORIGINATED;
1627 radv_info->n_solicitations_dropped += is_dropped;
1628 radv_info->n_solicitations_rcvd += is_solicitation;
1630 if ((error0 == ICMP6_ERROR_NONE) && !is_dropped)
1632 radv_info->n_advertisements_sent++;
1633 n_advertisements_sent++;
1639 p0->error = error_node->errors[error0];
1641 if (error0 != ICMP6_ERROR_NONE)
1642 vlib_error_count (vm, error_node->node_index, error0, 1);
1644 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1645 to_next, n_left_to_next,
1650 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1653 /* Account for router advertisements sent. */
1654 vlib_error_count (vm, error_node->node_index,
1655 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_TX,
1656 n_advertisements_sent);
1658 return frame->n_vectors;
1661 /* validate advertised info for consistancy (see RFC-4861 section 6.2.7) - log any inconsistencies, packet will always be dropped */
1662 static_always_inline uword
1663 icmp6_router_advertisement (vlib_main_t * vm,
1664 vlib_node_runtime_t * node, vlib_frame_t * frame)
1666 vnet_main_t *vnm = vnet_get_main ();
1667 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1668 uword n_packets = frame->n_vectors;
1669 u32 *from, *to_next;
1670 u32 n_left_from, n_left_to_next, next_index;
1671 u32 n_advertisements_rcvd = 0;
1673 vlib_node_runtime_t *error_node =
1674 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1676 from = vlib_frame_vector_args (frame);
1677 n_left_from = n_packets;
1678 next_index = node->cached_next_index;
1680 if (node->flags & VLIB_NODE_FLAG_TRACE)
1681 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1683 sizeof (icmp6_input_trace_t));
1685 while (n_left_from > 0)
1687 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1689 while (n_left_from > 0 && n_left_to_next > 0)
1693 ip6_radv_t *radv_info = 0;
1694 icmp6_router_advertisement_header_t *h0;
1695 u32 bi0, options_len0, sw_if_index0, next0, error0;
1697 bi0 = to_next[0] = from[0];
1702 n_left_to_next -= 1;
1704 p0 = vlib_get_buffer (vm, bi0);
1705 ip0 = vlib_buffer_get_current (p0);
1706 h0 = ip6_next_header (ip0);
1708 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1710 error0 = ICMP6_ERROR_NONE;
1711 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1713 /* Check that source address is link-local */
1714 error0 = (!ip6_address_is_link_local_unicast (&ip0->src_address)) ?
1715 ICMP6_ERROR_ROUTER_ADVERTISEMENT_SOURCE_NOT_LINK_LOCAL : error0;
1717 /* default is to drop */
1718 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1720 n_advertisements_rcvd++;
1722 if (error0 == ICMP6_ERROR_NONE)
1724 vnet_sw_interface_t *sw_if0;
1725 ethernet_interface_t *eth_if0;
1727 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1728 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1730 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1732 /* only support ethernet interface type for now */
1734 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1737 if (error0 == ICMP6_ERROR_NONE)
1741 /* look up the radv_t information for this interface */
1742 vec_validate_init_empty
1743 (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
1745 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1748 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1752 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1755 if (error0 == ICMP6_ERROR_NONE)
1757 /* validate advertised information */
1758 if ((h0->current_hop_limit && radv_info->curr_hop_limit)
1759 && (h0->current_hop_limit !=
1760 radv_info->curr_hop_limit))
1762 ip6_neighbor_syslog (vm, LOG_WARNING,
1763 "our AdvCurHopLimit on %U doesn't agree with %U",
1764 format_vnet_sw_if_index_name,
1771 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP)
1772 != radv_info->adv_managed_flag)
1774 ip6_neighbor_syslog (vm, LOG_WARNING,
1775 "our AdvManagedFlag on %U doesn't agree with %U",
1776 format_vnet_sw_if_index_name,
1783 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP)
1784 != radv_info->adv_other_flag)
1786 ip6_neighbor_syslog (vm, LOG_WARNING,
1787 "our AdvOtherConfigFlag on %U doesn't agree with %U",
1788 format_vnet_sw_if_index_name,
1795 time_in_msec_between_retransmitted_neighbor_solicitations
1797 adv_time_in_msec_between_retransmitted_neighbor_solicitations)
1799 time_in_msec_between_retransmitted_neighbor_solicitations
1801 clib_host_to_net_u32 (radv_info->
1802 adv_time_in_msec_between_retransmitted_neighbor_solicitations)))
1804 ip6_neighbor_syslog (vm, LOG_WARNING,
1805 "our AdvRetransTimer on %U doesn't agree with %U",
1806 format_vnet_sw_if_index_name,
1812 if ((h0->neighbor_reachable_time_in_msec &&
1813 radv_info->adv_neighbor_reachable_time_in_msec) &&
1814 (h0->neighbor_reachable_time_in_msec !=
1815 clib_host_to_net_u32
1816 (radv_info->adv_neighbor_reachable_time_in_msec)))
1818 ip6_neighbor_syslog (vm, LOG_WARNING,
1819 "our AdvReachableTime on %U doesn't agree with %U",
1820 format_vnet_sw_if_index_name,
1826 /* check for MTU or prefix options or .. */
1827 u8 *opt_hdr = (u8 *) (h0 + 1);
1828 while (options_len0 > 0)
1830 icmp6_neighbor_discovery_option_header_t *o0 =
1831 (icmp6_neighbor_discovery_option_header_t *)
1833 int opt_len = o0->n_data_u64s << 3;
1834 icmp6_neighbor_discovery_option_type_t option_type =
1837 if (options_len0 < 2)
1839 ip6_neighbor_syslog (vm, LOG_ERR,
1840 "malformed RA packet on %U from %U",
1841 format_vnet_sw_if_index_name,
1850 ip6_neighbor_syslog (vm, LOG_ERR,
1851 " zero length option in RA on %U from %U",
1852 format_vnet_sw_if_index_name,
1858 else if (opt_len > options_len0)
1860 ip6_neighbor_syslog (vm, LOG_ERR,
1861 "option length in RA packet greater than total length on %U from %U",
1862 format_vnet_sw_if_index_name,
1869 options_len0 -= opt_len;
1872 switch (option_type)
1874 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu:
1876 icmp6_neighbor_discovery_mtu_option_t *h =
1877 (icmp6_neighbor_discovery_mtu_option_t
1880 if (opt_len < sizeof (*h))
1883 if ((h->mtu && radv_info->adv_link_mtu) &&
1885 clib_host_to_net_u32
1886 (radv_info->adv_link_mtu)))
1888 ip6_neighbor_syslog (vm, LOG_WARNING,
1889 "our AdvLinkMTU on %U doesn't agree with %U",
1890 format_vnet_sw_if_index_name,
1898 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information:
1900 icmp6_neighbor_discovery_prefix_information_option_t
1902 (icmp6_neighbor_discovery_prefix_information_option_t
1905 /* validate advertised prefix options */
1906 ip6_radv_prefix_t *pr_info;
1907 u32 preferred, valid;
1909 if (opt_len < sizeof (*h))
1913 clib_net_to_host_u32 (h->preferred_time);
1914 valid = clib_net_to_host_u32 (h->valid_time);
1916 /* look for matching prefix - if we our advertising it, it better be consistant */
1918 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
1922 ip6_address_mask_from_width(&mask, pr_info->prefix_len);
1924 if(pr_info->enabled &&
1925 (pr_info->prefix_len == h->dst_address_length) &&
1926 ip6_address_is_equal_masked (&pr_info->prefix, &h->dst_address, &mask))
1929 if(!pr_info->decrement_lifetime_flag &&
1930 valid != pr_info->adv_valid_lifetime_in_secs)
1932 ip6_neighbor_syslog(vm, LOG_WARNING,
1933 "our ADV validlifetime on %U for %U does not agree with %U",
1934 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
1935 format_ip6_address, &h->dst_address);
1937 if(!pr_info->decrement_lifetime_flag &&
1938 preferred != pr_info->adv_pref_lifetime_in_secs)
1940 ip6_neighbor_syslog(vm, LOG_WARNING,
1941 "our ADV preferredlifetime on %U for %U does not agree with %U",
1942 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
1943 format_ip6_address, &h->dst_address);
1960 p0->error = error_node->errors[error0];
1962 if (error0 != ICMP6_ERROR_NONE)
1963 vlib_error_count (vm, error_node->node_index, error0, 1);
1965 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1966 to_next, n_left_to_next,
1970 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1973 /* Account for router advertisements sent. */
1974 vlib_error_count (vm, error_node->node_index,
1975 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_RX,
1976 n_advertisements_rcvd);
1978 return frame->n_vectors;
1982 * @brief Add a multicast Address to the advertised MLD set
1985 ip6_neighbor_add_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
1987 ip6_mldp_group_t *mcast_group_info;
1990 /* lookup mldp info for this interface */
1991 p = mhash_get (&radv_info->address_to_mldp_index, &addr);
1993 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
1996 if (!mcast_group_info)
2000 pool_get (radv_info->mldp_group_pool, mcast_group_info);
2002 mi = mcast_group_info - radv_info->mldp_group_pool;
2003 mhash_set (&radv_info->address_to_mldp_index, &addr, mi, /* old_value */
2006 mcast_group_info->type = 4;
2007 mcast_group_info->mcast_source_address_pool = 0;
2008 mcast_group_info->num_sources = 0;
2009 clib_memcpy (&mcast_group_info->mcast_address, &addr,
2010 sizeof (ip6_address_t));
2015 * @brief Delete a multicast Address from the advertised MLD set
2018 ip6_neighbor_del_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2020 ip6_mldp_group_t *mcast_group_info;
2023 p = mhash_get (&radv_info->address_to_mldp_index, &addr);
2025 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2027 if (mcast_group_info)
2029 mhash_unset (&radv_info->address_to_mldp_index, &addr,
2031 pool_put (radv_info->mldp_group_pool, mcast_group_info);
2036 * @brief Add a multicast Address to the advertised MLD set
2039 ip6_neighbor_add_mld_grp (ip6_radv_t * a,
2040 ip6_multicast_address_scope_t scope,
2041 ip6_multicast_link_local_group_id_t group)
2045 ip6_set_reserved_multicast_address (&addr, scope, group);
2047 ip6_neighbor_add_mld_prefix (a, &addr);
2051 * @brief create and initialize router advertisement parameters with default
2052 * values for this intfc
2055 ip6_neighbor_sw_interface_add_del (vnet_main_t * vnm,
2056 u32 sw_if_index, u32 is_add)
2058 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2061 vnet_sw_interface_t *sw_if0;
2062 ethernet_interface_t *eth_if0 = 0;
2064 /* lookup radv container - ethernet interfaces only */
2065 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2066 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2067 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2072 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2074 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2078 a = pool_elt_at_index (nm->if_radv_pool, ri);
2082 ip6_radv_prefix_t *p;
2083 ip6_mldp_group_t *m;
2085 /* release the lock on the interface's mcast adj */
2086 adj_unlock (a->mcast_adj_index);
2088 /* clean up prefix and MDP pools */
2090 pool_flush(p, a->adv_prefixes_pool,
2092 mhash_unset (&a->address_to_prefix_index, &p->prefix, 0);
2094 pool_flush (m, a->mldp_group_pool,
2096 mhash_unset (&a->address_to_mldp_index, &m->mcast_address, 0);
2100 pool_free (a->mldp_group_pool);
2101 pool_free (a->adv_prefixes_pool);
2103 mhash_free (&a->address_to_prefix_index);
2104 mhash_free (&a->address_to_mldp_index);
2106 pool_put (nm->if_radv_pool, a);
2107 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ~0;
2115 vnet_hw_interface_t *hw_if0;
2117 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index);
2119 pool_get (nm->if_radv_pool, a);
2121 ri = a - nm->if_radv_pool;
2122 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ri;
2124 /* initialize default values (most of which are zero) */
2125 memset (a, 0, sizeof (a[0]));
2127 a->sw_if_index = sw_if_index;
2128 a->max_radv_interval = DEF_MAX_RADV_INTERVAL;
2129 a->min_radv_interval = DEF_MIN_RADV_INTERVAL;
2130 a->curr_hop_limit = DEF_CURR_HOP_LIMIT;
2131 a->adv_router_lifetime_in_sec = DEF_DEF_RTR_LIFETIME;
2133 /* send ll address source address option */
2134 a->adv_link_layer_address = 1;
2136 a->min_delay_between_radv = MIN_DELAY_BETWEEN_RAS;
2137 a->max_delay_between_radv = MAX_DELAY_BETWEEN_RAS;
2138 a->max_rtr_default_lifetime = MAX_DEF_RTR_LIFETIME;
2139 a->seed = (u32) clib_cpu_time_now ();
2140 (void) random_u32 (&a->seed);
2141 a->randomizer = clib_cpu_time_now ();
2142 (void) random_u64 (&a->randomizer);
2144 a->initial_adverts_count = MAX_INITIAL_RTR_ADVERTISEMENTS;
2145 a->initial_adverts_sent = a->initial_adverts_count - 1;
2146 a->initial_adverts_interval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
2148 /* deafult is to send */
2151 /* fill in radv_info for this interface that will be needed later */
2152 a->adv_link_mtu = hw_if0->max_l3_packet_bytes[VLIB_RX];
2154 clib_memcpy (a->link_layer_address, eth_if0->address, 6);
2156 /* fill in default link-local address (this may be overridden) */
2157 ip6_link_local_address_from_ethernet_address
2158 (&a->link_local_address, eth_if0->address);
2160 mhash_init (&a->address_to_prefix_index, sizeof (uword),
2161 sizeof (ip6_address_t));
2162 mhash_init (&a->address_to_mldp_index, sizeof (uword),
2163 sizeof (ip6_address_t));
2165 a->mcast_adj_index = adj_mcast_add_or_lock (FIB_PROTOCOL_IP6,
2169 /* add multicast groups we will always be reporting */
2170 ip6_neighbor_add_mld_grp (a,
2171 IP6_MULTICAST_SCOPE_link_local,
2172 IP6_MULTICAST_GROUP_ID_all_hosts);
2173 ip6_neighbor_add_mld_grp (a,
2174 IP6_MULTICAST_SCOPE_link_local,
2175 IP6_MULTICAST_GROUP_ID_all_routers);
2176 ip6_neighbor_add_mld_grp (a,
2177 IP6_MULTICAST_SCOPE_link_local,
2178 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2184 /* send an mldpv2 report */
2186 ip6_neighbor_send_mldpv2_report (u32 sw_if_index)
2188 vnet_main_t *vnm = vnet_get_main ();
2189 vlib_main_t *vm = vnm->vlib_main;
2190 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2191 vnet_sw_interface_t *sw_if0;
2192 ethernet_interface_t *eth_if0;
2196 ip6_radv_t *radv_info;
2206 icmp6_multicast_listener_report_header_t *rh0;
2207 icmp6_multicast_listener_report_packet_t *rp0;
2209 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2210 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
2211 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2213 if (!eth_if0 || !vnet_sw_interface_is_admin_up (vnm, sw_if_index))
2216 /* look up the radv_t information for this interface */
2217 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2220 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2225 /* send report now - build a mldpv2 report packet */
2226 n_allocated = vlib_buffer_alloc_from_free_list (vm,
2229 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2230 if (PREDICT_FALSE (n_allocated == 0))
2232 clib_warning ("buffer allocation failure");
2236 b0 = vlib_get_buffer (vm, bo0);
2238 /* adjust the sizeof the buffer to just include the ipv6 header */
2239 b0->current_length = sizeof (icmp6_multicast_listener_report_packet_t);
2241 payload_length = sizeof (icmp6_multicast_listener_report_header_t);
2243 b0->error = ICMP6_ERROR_NONE;
2245 rp0 = vlib_buffer_get_current (b0);
2246 ip0 = (ip6_header_t *) & rp0->ip;
2247 rh0 = (icmp6_multicast_listener_report_header_t *) & rp0->report_hdr;
2249 memset (rp0, 0x0, sizeof (icmp6_multicast_listener_report_packet_t));
2251 ip0->ip_version_traffic_class_and_flow_label =
2252 clib_host_to_net_u32 (0x6 << 28);
2254 ip0->protocol = IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS;
2255 /* for DEBUG - vnet driver won't seem to emit router alerts */
2256 /* ip0->protocol = IP_PROTOCOL_ICMP6; */
2259 rh0->icmp.type = ICMP6_multicast_listener_report_v2;
2261 /* source address MUST be the link-local address */
2262 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2263 ip0->src_address = radv_info->link_local_address;
2265 /* destination is all mldpv2 routers */
2266 ip6_set_reserved_multicast_address (&ip0->dst_address,
2267 IP6_MULTICAST_SCOPE_link_local,
2268 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2270 /* add reports here */
2271 ip6_mldp_group_t *m;
2272 int num_addr_records = 0;
2273 icmp6_multicast_address_record_t rr;
2275 /* fill in the hop-by-hop extension header (router alert) info */
2276 rh0->ext_hdr.next_hdr = IP_PROTOCOL_ICMP6;
2277 rh0->ext_hdr.n_data_u64s = 0;
2279 rh0->alert.type = IP6_MLDP_ALERT_TYPE;
2281 rh0->alert.value = 0;
2286 rh0->icmp.checksum = 0;
2289 pool_foreach (m, radv_info->mldp_group_pool,
2292 rr.aux_data_len_u32s = 0;
2293 rr.num_sources = clib_host_to_net_u16 (m->num_sources);
2294 clib_memcpy(&rr.mcast_addr, &m->mcast_address, sizeof(ip6_address_t));
2298 vlib_buffer_add_data
2299 (vm, b0->free_list_index, bo0,
2300 (void *)&rr, sizeof(icmp6_multicast_address_record_t));
2302 payload_length += sizeof( icmp6_multicast_address_record_t);
2307 rh0->num_addr_records = clib_host_to_net_u16 (num_addr_records);
2309 /* update lengths */
2310 ip0->payload_length = clib_host_to_net_u16 (payload_length);
2312 rh0->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0,
2314 ASSERT (bogus_length == 0);
2317 * OK to override w/ no regard for actual FIB, because
2318 * ip6-rewrite only looks at the adjacency.
2320 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
2321 vnet_main.local_interface_sw_if_index;
2323 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
2324 b0->flags |= VNET_BUFFER_LOCALLY_ORIGINATED;
2326 vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite-mcast");
2328 f = vlib_get_frame_to_node (vm, node->index);
2329 to_next = vlib_frame_vector_args (f);
2333 vlib_put_frame_to_node (vm, node->index, f);
2338 VLIB_REGISTER_NODE (ip6_icmp_router_solicitation_node,static) =
2340 .function = icmp6_router_solicitation,
2341 .name = "icmp6-router-solicitation",
2343 .vector_size = sizeof (u32),
2345 .format_trace = format_icmp6_input_trace,
2347 .n_next_nodes = ICMP6_ROUTER_SOLICITATION_N_NEXT,
2349 [ICMP6_ROUTER_SOLICITATION_NEXT_DROP] = "error-drop",
2350 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW] = "ip6-rewrite-mcast",
2351 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX] = "interface-output",
2356 /* send a RA or update the timer info etc.. */
2358 ip6_neighbor_process_timer_event (vlib_main_t * vm,
2359 vlib_node_runtime_t * node,
2360 vlib_frame_t * frame)
2362 vnet_main_t *vnm = vnet_get_main ();
2363 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2364 ip6_radv_t *radv_info;
2365 vlib_frame_t *f = 0;
2366 u32 n_this_frame = 0;
2367 u32 n_left_to_next = 0;
2370 icmp6_router_solicitation_header_t *h0;
2372 f64 now = vlib_time_now (vm);
2374 /* Interface ip6 radv info list */
2376 pool_foreach (radv_info, nm->if_radv_pool,
2378 if( !vnet_sw_interface_is_admin_up (vnm, radv_info->sw_if_index))
2380 radv_info->initial_adverts_sent = radv_info->initial_adverts_count-1;
2381 radv_info->next_multicast_time = now;
2382 radv_info->last_multicast_time = now;
2383 radv_info->last_radv_time = 0;
2384 radv_info->all_routers_mcast = 0;
2388 /* Make sure that we've joined the all-routers multicast group */
2389 if(!radv_info->all_routers_mcast)
2391 /* send MDLP_REPORT_EVENT message */
2392 ip6_neighbor_send_mldpv2_report(radv_info->sw_if_index);
2393 radv_info->all_routers_mcast = 1;
2396 /* is it time to send a multicast RA on this interface? */
2397 if(radv_info->send_radv && (now >= radv_info->next_multicast_time))
2402 f64 rfn = (radv_info->max_radv_interval - radv_info->min_radv_interval) *
2403 random_f64 (&radv_info->seed) + radv_info->min_radv_interval;
2405 /* multicast send - compute next multicast send time */
2406 if( radv_info->initial_adverts_sent > 0)
2408 radv_info->initial_adverts_sent--;
2409 if(rfn > radv_info-> initial_adverts_interval)
2410 rfn = radv_info-> initial_adverts_interval;
2412 /* check to see if we are ceasing to send */
2413 if( radv_info->initial_adverts_sent == 0)
2414 if(radv_info->cease_radv)
2415 radv_info->send_radv = 0;
2418 radv_info->next_multicast_time = rfn + now;
2419 radv_info->last_multicast_time = now;
2421 /* send advert now - build a "solicted" router advert with unspecified source address */
2422 n_allocated = vlib_buffer_alloc_from_free_list
2423 (vm, &bo0, n_to_alloc, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2425 if (PREDICT_FALSE(n_allocated == 0))
2427 clib_warning ("buffer allocation failure");
2430 b0 = vlib_get_buffer (vm, bo0);
2431 b0->current_length = sizeof( icmp6_router_solicitation_header_t);
2432 b0->error = ICMP6_ERROR_NONE;
2433 vnet_buffer (b0)->sw_if_index[VLIB_RX] = radv_info->sw_if_index;
2435 h0 = vlib_buffer_get_current (b0);
2437 memset (h0, 0, sizeof (icmp6_router_solicitation_header_t));
2439 h0->ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2440 h0->ip.payload_length = clib_host_to_net_u16 (sizeof (icmp6_router_solicitation_header_t)
2441 - STRUCT_OFFSET_OF (icmp6_router_solicitation_header_t, neighbor));
2442 h0->ip.protocol = IP_PROTOCOL_ICMP6;
2443 h0->ip.hop_limit = 255;
2445 /* set src/dst address as "unspecified" this marks this packet as internally generated rather than recieved */
2446 h0->ip.src_address.as_u64[0] = 0;
2447 h0->ip.src_address.as_u64[1] = 0;
2449 h0->ip.dst_address.as_u64[0] = 0;
2450 h0->ip.dst_address.as_u64[1] = 0;
2452 h0->neighbor.icmp.type = ICMP6_router_solicitation;
2454 if (PREDICT_FALSE(f == 0))
2456 f = vlib_get_frame_to_node (vm, ip6_icmp_router_solicitation_node.index);
2457 to_next = vlib_frame_vector_args (f);
2458 n_left_to_next = VLIB_FRAME_SIZE;
2467 if (PREDICT_FALSE(n_left_to_next == 0))
2469 f->n_vectors = n_this_frame;
2470 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2479 ASSERT (n_this_frame);
2480 f->n_vectors = n_this_frame;
2481 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2487 ip6_icmp_neighbor_discovery_event_process (vlib_main_t * vm,
2488 vlib_node_runtime_t * node,
2489 vlib_frame_t * frame)
2492 ip6_icmp_neighbor_discovery_event_data_t *event_data;
2494 /* init code here */
2498 vlib_process_wait_for_event_or_clock (vm, 1. /* seconds */ );
2500 event_data = vlib_process_get_event_data (vm, &event_type);
2504 /* No events found: timer expired. */
2505 /* process interface list and send RAs as appropriate, update timer info */
2506 ip6_neighbor_process_timer_event (vm, node, frame);
2513 case ICMP6_ND_EVENT_INIT:
2524 _vec_len (event_data) = 0;
2527 return frame->n_vectors;
2531 VLIB_REGISTER_NODE (ip6_icmp_router_advertisement_node,static) =
2533 .function = icmp6_router_advertisement,
2534 .name = "icmp6-router-advertisement",
2536 .vector_size = sizeof (u32),
2538 .format_trace = format_icmp6_input_trace,
2547 vlib_node_registration_t ip6_icmp_neighbor_discovery_event_node = {
2549 .function = ip6_icmp_neighbor_discovery_event_process,
2550 .name = "ip6-icmp-neighbor-discovery-event-process",
2551 .type = VLIB_NODE_TYPE_PROCESS,
2555 icmp6_neighbor_solicitation (vlib_main_t * vm,
2556 vlib_node_runtime_t * node, vlib_frame_t * frame)
2558 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
2559 /* is_solicitation */
2564 icmp6_neighbor_advertisement (vlib_main_t * vm,
2565 vlib_node_runtime_t * node,
2566 vlib_frame_t * frame)
2568 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
2569 /* is_solicitation */
2574 VLIB_REGISTER_NODE (ip6_icmp_neighbor_solicitation_node,static) =
2576 .function = icmp6_neighbor_solicitation,
2577 .name = "icmp6-neighbor-solicitation",
2579 .vector_size = sizeof (u32),
2581 .format_trace = format_icmp6_input_trace,
2583 .n_next_nodes = ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
2585 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP] = "error-drop",
2586 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY] = "interface-output",
2592 VLIB_REGISTER_NODE (ip6_icmp_neighbor_advertisement_node,static) =
2594 .function = icmp6_neighbor_advertisement,
2595 .name = "icmp6-neighbor-advertisement",
2597 .vector_size = sizeof (u32),
2599 .format_trace = format_icmp6_input_trace,
2608 /* API support functions */
2610 ip6_neighbor_ra_config (vlib_main_t * vm, u32 sw_if_index,
2611 u8 suppress, u8 managed, u8 other,
2612 u8 ll_option, u8 send_unicast, u8 cease,
2613 u8 use_lifetime, u32 lifetime,
2614 u32 initial_count, u32 initial_interval,
2615 u32 max_interval, u32 min_interval, u8 is_no)
2617 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2621 /* look up the radv_t information for this interface */
2622 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2624 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2625 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
2630 ip6_radv_t *radv_info;
2631 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2633 if ((max_interval != 0) && (min_interval == 0))
2634 min_interval = .75 * max_interval;
2638 0) ? ((is_no) ? DEF_MAX_RADV_INTERVAL : max_interval) :
2639 radv_info->max_radv_interval;
2642 0) ? ((is_no) ? DEF_MIN_RADV_INTERVAL : min_interval) :
2643 radv_info->min_radv_interval;
2646 0) ? ((is_no) ? DEF_DEF_RTR_LIFETIME : lifetime) :
2647 radv_info->adv_router_lifetime_in_sec;
2651 if (lifetime > MAX_DEF_RTR_LIFETIME)
2652 lifetime = MAX_DEF_RTR_LIFETIME;
2654 if (lifetime <= max_interval)
2655 return VNET_API_ERROR_INVALID_VALUE;
2658 if (min_interval != 0)
2660 if ((min_interval > .75 * max_interval) || (min_interval < 3))
2661 return VNET_API_ERROR_INVALID_VALUE;
2664 if ((initial_count > MAX_INITIAL_RTR_ADVERTISEMENTS) ||
2665 (initial_interval > MAX_INITIAL_RTR_ADVERT_INTERVAL))
2666 return VNET_API_ERROR_INVALID_VALUE;
2669 if "flag" is set and is_no is true then restore default value else set value corresponding to "flag"
2670 if "flag" is clear don't change corresponding value
2672 radv_info->send_radv =
2673 (suppress != 0) ? ((is_no != 0) ? 1 : 0) : radv_info->send_radv;
2674 radv_info->adv_managed_flag =
2675 (managed != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_managed_flag;
2676 radv_info->adv_other_flag =
2677 (other != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_other_flag;
2678 radv_info->adv_link_layer_address =
2680 0) ? ((is_no) ? 1 : 0) : radv_info->adv_link_layer_address;
2681 radv_info->send_unicast =
2682 (send_unicast != 0) ? ((is_no) ? 0 : 1) : radv_info->send_unicast;
2683 radv_info->cease_radv =
2684 (cease != 0) ? ((is_no) ? 0 : 1) : radv_info->cease_radv;
2686 radv_info->min_radv_interval = min_interval;
2687 radv_info->max_radv_interval = max_interval;
2688 radv_info->adv_router_lifetime_in_sec = lifetime;
2690 radv_info->initial_adverts_count =
2692 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERTISEMENTS : initial_count) :
2693 radv_info->initial_adverts_count;
2694 radv_info->initial_adverts_interval =
2695 (initial_interval !=
2696 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERT_INTERVAL : initial_interval) :
2697 radv_info->initial_adverts_interval;
2700 if ((cease != 0) && (is_no))
2701 radv_info->send_radv = 1;
2703 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
2704 radv_info->next_multicast_time = vlib_time_now (vm);
2705 radv_info->last_multicast_time = vlib_time_now (vm);
2706 radv_info->last_radv_time = 0;
2712 ip6_neighbor_ra_prefix (vlib_main_t * vm, u32 sw_if_index,
2713 ip6_address_t * prefix_addr, u8 prefix_len,
2714 u8 use_default, u32 val_lifetime, u32 pref_lifetime,
2715 u8 no_advertise, u8 off_link, u8 no_autoconfig,
2716 u8 no_onlink, u8 is_no)
2718 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2723 /* look up the radv_t information for this interface */
2724 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2727 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2729 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
2733 f64 now = vlib_time_now (vm);
2734 ip6_radv_t *radv_info;
2735 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2737 /* prefix info add, delete or update */
2738 ip6_radv_prefix_t *prefix;
2740 /* lookup prefix info for this address on this interface */
2741 uword *p = mhash_get (&radv_info->address_to_prefix_index, prefix_addr);
2743 prefix = p ? pool_elt_at_index (radv_info->adv_prefixes_pool, p[0]) : 0;
2749 return VNET_API_ERROR_INVALID_VALUE; /* invalid prefix */
2751 if (prefix->prefix_len != prefix_len)
2752 return VNET_API_ERROR_INVALID_VALUE_2;
2754 /* FIXME - Should the DP do this or the CP ? */
2755 /* do specific delete processing here before returning */
2756 /* try to remove from routing table */
2758 mhash_unset (&radv_info->address_to_prefix_index, prefix_addr,
2760 pool_put (radv_info->adv_prefixes_pool, prefix);
2762 radv_info->initial_adverts_sent =
2763 radv_info->initial_adverts_count - 1;
2764 radv_info->next_multicast_time = vlib_time_now (vm);
2765 radv_info->last_multicast_time = vlib_time_now (vm);
2766 radv_info->last_radv_time = 0;
2770 /* adding or changing */
2775 pool_get (radv_info->adv_prefixes_pool, prefix);
2776 pi = prefix - radv_info->adv_prefixes_pool;
2777 mhash_set (&radv_info->address_to_prefix_index, prefix_addr, pi,
2780 memset (prefix, 0x0, sizeof (ip6_radv_prefix_t));
2782 prefix->prefix_len = prefix_len;
2783 clib_memcpy (&prefix->prefix, prefix_addr, sizeof (ip6_address_t));
2785 /* initialize default values */
2786 prefix->adv_on_link_flag = 1; /* L bit set */
2787 prefix->adv_autonomous_flag = 1; /* A bit set */
2788 prefix->adv_valid_lifetime_in_secs = DEF_ADV_VALID_LIFETIME;
2789 prefix->adv_pref_lifetime_in_secs = DEF_ADV_PREF_LIFETIME;
2790 prefix->enabled = 1;
2791 prefix->decrement_lifetime_flag = 1;
2792 prefix->deprecated_prefix_flag = 1;
2796 /* FIXME - Should the DP do this or the CP ? */
2797 /* insert prefix into routing table as a connected prefix */
2806 if (prefix->prefix_len != prefix_len)
2807 return VNET_API_ERROR_INVALID_VALUE_2;
2811 /* FIXME - Should the DP do this or the CP ? */
2812 /* remove from routing table if already there */
2816 if ((val_lifetime == ~0) || (pref_lifetime == ~0))
2818 prefix->adv_valid_lifetime_in_secs = ~0;
2819 prefix->adv_pref_lifetime_in_secs = ~0;
2820 prefix->decrement_lifetime_flag = 0;
2824 prefix->adv_valid_lifetime_in_secs = val_lifetime;;
2825 prefix->adv_pref_lifetime_in_secs = pref_lifetime;
2828 /* copy remaining */
2829 prefix->enabled = !(no_advertise != 0);
2830 prefix->adv_on_link_flag = !((off_link != 0) || (no_onlink != 0));
2831 prefix->adv_autonomous_flag = !(no_autoconfig != 0);
2835 /* fill in the expiration times */
2836 prefix->valid_lifetime_expires =
2837 now + prefix->adv_valid_lifetime_in_secs;
2838 prefix->pref_lifetime_expires = now + prefix->adv_pref_lifetime_in_secs;
2840 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
2841 radv_info->next_multicast_time = vlib_time_now (vm);
2842 radv_info->last_multicast_time = vlib_time_now (vm);
2843 radv_info->last_radv_time = 0;
2849 ip6_neighbor_cmd (vlib_main_t * vm, unformat_input_t * main_input,
2850 vlib_cli_command_t * cmd)
2852 vnet_main_t *vnm = vnet_get_main ();
2853 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2854 clib_error_t *error = 0;
2856 u8 suppress = 0, managed = 0, other = 0;
2857 u8 suppress_ll_option = 0, send_unicast = 0, cease = 0;
2858 u8 use_lifetime = 0;
2859 u32 sw_if_index, ra_lifetime = 0, ra_initial_count =
2860 0, ra_initial_interval = 0;
2861 u32 ra_max_interval = 0, ra_min_interval = 0;
2863 unformat_input_t _line_input, *line_input = &_line_input;
2864 vnet_sw_interface_t *sw_if0;
2866 int add_radv_info = 1;
2867 __attribute__ ((unused)) ip6_radv_t *radv_info = 0;
2868 ip6_address_t ip6_addr;
2872 /* Get a line of input. */
2873 if (!unformat_user (main_input, unformat_line_input, line_input))
2876 /* get basic radv info for this interface */
2877 if (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2880 if (unformat_user (line_input,
2881 unformat_vnet_sw_interface, vnm, &sw_if_index))
2884 ethernet_interface_t *eth_if0 = 0;
2886 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2887 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2889 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2894 clib_error_return (0, "Interface must be of ethernet type");
2898 /* look up the radv_t information for this interface */
2899 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
2902 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2906 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2910 error = clib_error_return (0, "unknown interface %U'",
2911 format_unformat_error, line_input);
2917 error = clib_error_return (0, "invalid interface name %U'",
2918 format_unformat_error, line_input);
2923 /* get the rest of the command */
2924 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2926 if (unformat (line_input, "no"))
2928 else if (unformat (line_input, "prefix %U/%d",
2929 unformat_ip6_address, &ip6_addr, &addr_len))
2934 else if (unformat (line_input, "ra-managed-config-flag"))
2939 else if (unformat (line_input, "ra-other-config-flag"))
2944 else if (unformat (line_input, "ra-suppress") ||
2945 unformat (line_input, "ra-surpress"))
2950 else if (unformat (line_input, "ra-suppress-link-layer") ||
2951 unformat (line_input, "ra-surpress-link-layer"))
2953 suppress_ll_option = 1;
2956 else if (unformat (line_input, "ra-send-unicast"))
2961 else if (unformat (line_input, "ra-lifetime"))
2963 if (!unformat (line_input, "%d", &ra_lifetime))
2965 error = unformat_parse_error (line_input);
2971 else if (unformat (line_input, "ra-initial"))
2974 (line_input, "%d %d", &ra_initial_count, &ra_initial_interval))
2976 error = unformat_parse_error (line_input);
2981 else if (unformat (line_input, "ra-interval"))
2983 if (!unformat (line_input, "%d", &ra_max_interval))
2985 error = unformat_parse_error (line_input);
2989 if (!unformat (line_input, "%d", &ra_min_interval))
2990 ra_min_interval = 0;
2993 else if (unformat (line_input, "ra-cease"))
3000 error = unformat_parse_error (line_input);
3007 ip6_neighbor_ra_config (vm, sw_if_index,
3008 suppress, managed, other,
3009 suppress_ll_option, send_unicast, cease,
3010 use_lifetime, ra_lifetime,
3011 ra_initial_count, ra_initial_interval,
3012 ra_max_interval, ra_min_interval, is_no);
3016 u32 valid_lifetime_in_secs = 0;
3017 u32 pref_lifetime_in_secs = 0;
3018 u8 use_prefix_default_values = 0;
3019 u8 no_advertise = 0;
3021 u8 no_autoconfig = 0;
3024 /* get the rest of the command */
3025 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3027 if (unformat (line_input, "default"))
3029 use_prefix_default_values = 1;
3032 else if (unformat (line_input, "infinite"))
3034 valid_lifetime_in_secs = ~0;
3035 pref_lifetime_in_secs = ~0;
3038 else if (unformat (line_input, "%d %d", &valid_lifetime_in_secs,
3039 &pref_lifetime_in_secs))
3046 /* get the rest of the command */
3047 while (!use_prefix_default_values &&
3048 unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3050 if (unformat (line_input, "no-advertise"))
3052 else if (unformat (line_input, "off-link"))
3054 else if (unformat (line_input, "no-autoconfig"))
3056 else if (unformat (line_input, "no-onlink"))
3060 error = unformat_parse_error (line_input);
3065 ip6_neighbor_ra_prefix (vm, sw_if_index,
3066 &ip6_addr, addr_len,
3067 use_prefix_default_values,
3068 valid_lifetime_in_secs,
3069 pref_lifetime_in_secs,
3071 off_link, no_autoconfig, no_onlink, is_no);
3075 unformat_free (line_input);
3081 ip6_print_addrs (vlib_main_t * vm, u32 * addrs)
3083 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3086 for (i = 0; i < vec_len (addrs); i++)
3088 ip_interface_address_t *a =
3089 pool_elt_at_index (lm->if_address_pool, addrs[i]);
3090 ip6_address_t *address = ip_interface_address_get_address (lm, a);
3092 vlib_cli_output (vm, "\t\t%U/%d",
3093 format_ip6_address, address, a->address_length);
3097 static clib_error_t *
3098 show_ip6_interface_cmd (vlib_main_t * vm,
3099 unformat_input_t * input, vlib_cli_command_t * cmd)
3101 vnet_main_t *vnm = vnet_get_main ();
3102 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3103 clib_error_t *error = 0;
3108 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3112 /* look up the radv_t information for this interface */
3113 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3116 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3120 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3121 ip6_radv_t *radv_info;
3122 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3124 vlib_cli_output (vm, "%U is admin %s\n",
3125 format_vnet_sw_interface_name, vnm,
3126 vnet_get_sw_interface (vnm, sw_if_index),
3127 (vnet_sw_interface_is_admin_up (vnm, sw_if_index) ?
3131 u32 *link_scope = 0, *global_scope = 0;
3132 u32 *local_scope = 0, *unknown_scope = 0;
3133 ip_interface_address_t *a;
3135 vec_validate_init_empty (lm->if_address_pool_index_by_sw_if_index,
3137 ai = lm->if_address_pool_index_by_sw_if_index[sw_if_index];
3139 while (ai != (u32) ~ 0)
3141 a = pool_elt_at_index (lm->if_address_pool, ai);
3142 ip6_address_t *address =
3143 ip_interface_address_get_address (lm, a);
3145 if (ip6_address_is_link_local_unicast (address))
3146 vec_add1 (link_scope, ai);
3147 else if (ip6_address_is_global_unicast (address))
3148 vec_add1 (global_scope, ai);
3149 else if (ip6_address_is_local_unicast (address))
3150 vec_add1 (local_scope, ai);
3152 vec_add1 (unknown_scope, ai);
3154 ai = a->next_this_sw_interface;
3157 if (vec_len (link_scope))
3159 vlib_cli_output (vm, "\tLink-local address(es):\n");
3160 ip6_print_addrs (vm, link_scope);
3161 vec_free (link_scope);
3164 if (vec_len (local_scope))
3166 vlib_cli_output (vm, "\tLocal unicast address(es):\n");
3167 ip6_print_addrs (vm, local_scope);
3168 vec_free (local_scope);
3171 if (vec_len (global_scope))
3173 vlib_cli_output (vm, "\tGlobal unicast address(es):\n");
3174 ip6_print_addrs (vm, global_scope);
3175 vec_free (global_scope);
3178 if (vec_len (unknown_scope))
3180 vlib_cli_output (vm, "\tOther-scope address(es):\n");
3181 ip6_print_addrs (vm, unknown_scope);
3182 vec_free (unknown_scope);
3185 vlib_cli_output (vm, "\tJoined group address(es):\n");
3186 ip6_mldp_group_t *m;
3188 pool_foreach (m, radv_info->mldp_group_pool,
3190 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
3195 vlib_cli_output (vm, "\tAdvertised Prefixes:\n");
3196 ip6_radv_prefix_t *p;
3198 pool_foreach (p, radv_info->adv_prefixes_pool,
3200 vlib_cli_output (vm, "\t\tprefix %U, length %d\n",
3201 format_ip6_address, &p->prefix, p->prefix_len);
3205 vlib_cli_output (vm, "\tMTU is %d\n", radv_info->adv_link_mtu);
3206 vlib_cli_output (vm, "\tICMP error messages are unlimited\n");
3207 vlib_cli_output (vm, "\tICMP redirects are disabled\n");
3208 vlib_cli_output (vm, "\tICMP unreachables are not sent\n");
3209 vlib_cli_output (vm, "\tND DAD is disabled\n");
3210 //vlib_cli_output (vm, "\tND reachable time is %d milliseconds\n",);
3211 vlib_cli_output (vm, "\tND advertised reachable time is %d\n",
3212 radv_info->adv_neighbor_reachable_time_in_msec);
3213 vlib_cli_output (vm,
3214 "\tND advertised retransmit interval is %d (msec)\n",
3216 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
3218 u32 ra_interval = radv_info->max_radv_interval;
3219 u32 ra_interval_min = radv_info->min_radv_interval;
3220 vlib_cli_output (vm,
3221 "\tND router advertisements are sent every %d seconds (min interval is %d)\n",
3222 ra_interval, ra_interval_min);
3223 vlib_cli_output (vm,
3224 "\tND router advertisements live for %d seconds\n",
3225 radv_info->adv_router_lifetime_in_sec);
3226 vlib_cli_output (vm,
3227 "\tHosts %s stateless autoconfig for addresses\n",
3228 (radv_info->adv_managed_flag) ? "use" :
3230 vlib_cli_output (vm, "\tND router advertisements sent %d\n",
3231 radv_info->n_advertisements_sent);
3232 vlib_cli_output (vm, "\tND router solicitations received %d\n",
3233 radv_info->n_solicitations_rcvd);
3234 vlib_cli_output (vm, "\tND router solicitations dropped %d\n",
3235 radv_info->n_solicitations_dropped);
3239 error = clib_error_return (0, "IPv6 not enabled on interface",
3240 format_unformat_error, input);
3248 * This command is used to display various IPv6 attributes on a given
3252 * Example of how to display IPv6 settings:
3253 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
3254 * GigabitEthernet2/0/0 is admin up
3255 * Link-local address(es):
3257 * Joined group address(es):
3262 * Advertised Prefixes:
3263 * prefix fe80::fe:28ff:fe9c:75b3, length 64
3265 * ICMP error messages are unlimited
3266 * ICMP redirects are disabled
3267 * ICMP unreachables are not sent
3268 * ND DAD is disabled
3269 * ND advertised reachable time is 0
3270 * ND advertised retransmit interval is 0 (msec)
3271 * ND router advertisements are sent every 200 seconds (min interval is 150)
3272 * ND router advertisements live for 600 seconds
3273 * Hosts use stateless autoconfig for addresses
3274 * ND router advertisements sent 19336
3275 * ND router solicitations received 0
3276 * ND router solicitations dropped 0
3278 * Example of output if IPv6 is not enabled on the interface:
3279 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
3280 * show ip6 interface: IPv6 not enabled on interface
3284 VLIB_CLI_COMMAND (show_ip6_interface_command, static) =
3286 .path = "show ip6 interface",
3287 .function = show_ip6_interface_cmd,
3288 .short_help = "show ip6 interface <interface>",
3293 disable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
3295 clib_error_t *error = 0;
3296 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3299 /* look up the radv_t information for this interface */
3300 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3302 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3304 /* if not created - do nothing */
3307 vnet_main_t *vnm = vnet_get_main ();
3308 ip6_radv_t *radv_info;
3310 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3312 /* check radv_info ref count for other ip6 addresses on this interface */
3313 /* This implicitly excludes the link local address */
3314 if (radv_info->ref_count == 0)
3316 /* essentially "disables" ipv6 on this interface */
3317 error = ip6_add_del_interface_address (vm, sw_if_index,
3319 link_local_address, 128,
3322 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index,
3324 ip6_mfib_interface_enable_disable (sw_if_index, 0);
3331 ip6_interface_enabled (vlib_main_t * vm, u32 sw_if_index)
3333 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3336 /* look up the radv_t information for this interface */
3337 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3340 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3346 enable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
3348 clib_error_t *error = 0;
3349 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3353 /* look up the radv_t information for this interface */
3354 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3357 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3359 /* if not created yet */
3362 vnet_main_t *vnm = vnet_get_main ();
3363 vnet_sw_interface_t *sw_if0;
3365 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
3366 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
3368 ethernet_interface_t *eth_if0;
3371 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
3374 /* create radv_info. for this interface. This holds all the info needed for router adverts */
3376 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, is_add);
3380 ip6_radv_t *radv_info;
3381 ip6_address_t link_local_address;
3383 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3385 ip6_link_local_address_from_ethernet_mac_address
3386 (&link_local_address, eth_if0->address);
3388 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index);
3389 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_SUB)
3391 /* make up an interface id */
3395 link_local_address.as_u64[0] = radv_info->randomizer;
3398 md5_add (&m, &link_local_address, 16);
3399 md5_finish (&m, digest);
3401 clib_memcpy (&link_local_address, digest, 16);
3403 radv_info->randomizer = link_local_address.as_u64[0];
3405 link_local_address.as_u64[0] =
3406 clib_host_to_net_u64 (0xFE80000000000000ULL);
3408 link_local_address.as_u8[8] &= 0xfd;
3411 ip6_mfib_interface_enable_disable (sw_if_index, 1);
3413 /* essentially "enables" ipv6 on this interface */
3414 error = ip6_add_del_interface_address (vm, sw_if_index,
3415 &link_local_address,
3417 /* address width */ ,
3421 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index,
3425 radv_info->link_local_address = link_local_address;
3434 static clib_error_t *
3435 enable_ip6_interface_cmd (vlib_main_t * vm,
3436 unformat_input_t * input, vlib_cli_command_t * cmd)
3438 vnet_main_t *vnm = vnet_get_main ();
3439 clib_error_t *error = 0;
3444 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3446 enable_ip6_interface (vm, sw_if_index);
3450 error = clib_error_return (0, "unknown interface\n'",
3451 format_unformat_error, input);
3458 * This command is used to enable IPv6 on a given interface.
3461 * Example of how enable IPv6 on a given interface:
3462 * @cliexcmd{enable ip6 interface GigabitEthernet2/0/0}
3465 VLIB_CLI_COMMAND (enable_ip6_interface_command, static) =
3467 .path = "enable ip6 interface",
3468 .function = enable_ip6_interface_cmd,
3469 .short_help = "enable ip6 interface <interface>",
3473 static clib_error_t *
3474 disable_ip6_interface_cmd (vlib_main_t * vm,
3475 unformat_input_t * input, vlib_cli_command_t * cmd)
3477 vnet_main_t *vnm = vnet_get_main ();
3478 clib_error_t *error = 0;
3483 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3485 error = disable_ip6_interface (vm, sw_if_index);
3489 error = clib_error_return (0, "unknown interface\n'",
3490 format_unformat_error, input);
3497 * This command is used to disable IPv6 on a given interface.
3500 * Example of how disable IPv6 on a given interface:
3501 * @cliexcmd{disable ip6 interface GigabitEthernet2/0/0}
3504 VLIB_CLI_COMMAND (disable_ip6_interface_command, static) =
3506 .path = "disable ip6 interface",
3507 .function = disable_ip6_interface_cmd,
3508 .short_help = "disable ip6 interface <interface>",
3513 * This command is used to configure the neighbor discovery
3514 * parameters on a given interface. Use the '<em>show ip6 interface</em>'
3515 * command to display some of the current neighbor discovery parameters
3516 * on a given interface. This command has three formats:
3519 * <b>Format 1 - Router Advertisement Options:</b> (Only one can be entered in a single command)
3521 * '<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>'
3525 * <em>[no] ra-managed-config-flag</em> - Advertises in ICMPv6
3526 * router-advertisement messages to use stateful address
3527 * auto-configuration to obtain address information (sets the M-bit).
3528 * Default is the M-bit is not set and the '<em>no</em>' option
3529 * returns it to this default state.
3531 * <em>[no] ra-other-config-flag</em> - Indicates in ICMPv6
3532 * router-advertisement messages that hosts use stateful auto
3533 * configuration to obtain nonaddress related information (sets
3534 * the O-bit). Default is the O-bit is not set and the '<em>no</em>'
3535 * option returns it to this default state.
3537 * <em>[no] ra-suppress</em> - Disables sending ICMPv6 router-advertisement
3538 * messages. The '<em>no</em>' option implies to enable sending ICMPv6
3539 * router-advertisement messages.
3541 * <em>[no] ra-suppress-link-layer</em> - Indicates not to include the
3542 * optional source link-layer address in the ICMPv6 router-advertisement
3543 * messages. Default is to include the optional source link-layer address
3544 * and the '<em>no</em>' option returns it to this default state.
3546 * <em>[no] ra-send-unicast</em> - Use the source address of the
3547 * router-solicitation message if availiable. The default is to use
3548 * multicast address of all nodes, and the '<em>no</em>' option returns
3549 * it to this default state.
3551 * <em>[no] ra-lifetime <lifetime></em> - Advertises the lifetime of a
3552 * default router in ICMPv6 router-advertisement messages. The range is
3553 * from 0 to 9000 seconds. '<em><lifetime></em>' must be greater than
3554 * '<em><max-interval></em>'. The default value is 600 seconds and the
3555 * '<em>no</em>' option returns it to this default value.
3557 * <em>[no] ra-initial <cnt> <interval></em> - Number of initial ICMPv6
3558 * router-advertisement messages sent and the interval between each
3559 * message. Range for count is 1 - 3 and default is 3. Range for interval
3560 * is 1 to 16 seconds, and default is 16 seconds. The '<em>no</em>' option
3561 * returns both to their default value.
3563 * <em>[no] ra-interval <max-interval> [<min-interval>]</em> - Configures the
3564 * interval between sending ICMPv6 router-advertisement messages. The
3565 * range for max-interval is from 4 to 200 seconds. min-interval can not
3566 * be more than 75% of max-interval. If not set, min-interval will be
3567 * set to 75% of max-interval. The range for min-interval is from 3 to
3568 * 150 seconds. The '<em>no</em>' option returns both to their default
3571 * <em>[no] ra-cease</em> - Cease sending ICMPv6 router-advertisement messages.
3572 * The '<em>no</em>' options implies to start (or restart) sending
3573 * ICMPv6 router-advertisement messages.
3576 * <b>Format 2 - Prefix Options:</b>
3578 * '<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>'
3582 * <em>no</em> - All additional flags are ignored and the prefix is deleted.
3584 * <em><valid-lifetime> <pref-lifetime></em> - '<em><valid-lifetime></em>' is the
3585 * length of time in seconds during what the prefix is valid for the purpose of
3586 * on-link determination. Range is 7203 to 2592000 seconds and default is 2592000
3587 * seconds (30 days). '<em><pref-lifetime></em>' is the prefered-lifetime and is the
3588 * length of time in seconds during what addresses generated from the prefix remain
3589 * preferred. Range is 0 to 604800 seconds and default is 604800 seconds (7 days).
3591 * <em>infinite</em> - Both '<em><valid-lifetime></em>' and '<em><<pref-lifetime></em>'
3592 * are inifinte, no timeout.
3594 * <em>no-advertise</em> - Do not send full router address in prefix
3595 * advertisement. Default is to advertise (i.e. - This flag is off by default).
3597 * <em>off-link</em> - Prefix is off-link, clear L-bit in packet. Default is on-link
3598 * (i.e. - This flag is off and L-bit in packet is set by default and this prefix can
3599 * be used for on-link determination). '<em>no-onlink</em>' also controls the L-bit.
3601 * <em>no-autoconfig</em> - Do not use prefix for autoconfiguration, clear A-bit in packet.
3602 * Default is autoconfig (i.e. - This flag is off and A-bit in packet is set by default.
3604 * <em>no-onlink</em> - Do not use prefix for onlink determination, clear L-bit in packet.
3605 * Default is on-link (i.e. - This flag is off and L-bit in packet is set by default and
3606 * this prefix can be used for on-link determination). '<em>off-link</em>' also controls
3610 * <b>Format 3: - Default of Prefix:</b>
3612 * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> default</b></em>'
3614 * When a new prefix is added (or existing one is being overwritten) <em>default</em>
3615 * uses default values for the prefix. If <em>no</em> is used, the <em>default</em>
3616 * is ignored and the prefix is deleted.
3620 * Example of how set a router advertisement option:
3621 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 ra-interval 100 20}
3622 * Example of how to add a prefix:
3623 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 prefix fe80::fe:28ff:fe9c:75b3/64 infinite no-advertise}
3624 * Example of how to delete a prefix:
3625 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 no prefix fe80::fe:28ff:fe9c:75b3/64}
3628 VLIB_CLI_COMMAND (ip6_nd_command, static) =
3631 .short_help = "ip6 nd <interface> ...",
3632 .function = ip6_neighbor_cmd,
3637 set_ip6_link_local_address (vlib_main_t * vm,
3638 u32 sw_if_index, ip6_address_t * address)
3640 clib_error_t *error = 0;
3641 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3643 ip6_radv_t *radv_info;
3644 vnet_main_t *vnm = vnet_get_main ();
3646 if (!ip6_address_is_link_local_unicast (address))
3648 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_LINK_LOCAL;
3649 return (error = clib_error_return (0, "address not link-local",
3650 format_unformat_error));
3653 /* call enable ipv6 */
3654 enable_ip6_interface (vm, sw_if_index);
3656 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3660 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3662 /* save if link local address (overwrite default) */
3664 /* delete the old one */
3665 error = ip6_add_del_interface_address (vm, sw_if_index,
3666 &radv_info->link_local_address,
3667 128, 1 /* is_del */ );
3671 /* add the new one */
3672 error = ip6_add_del_interface_address (vm, sw_if_index,
3678 radv_info->link_local_address = *address;
3684 vnm->api_errno = VNET_API_ERROR_IP6_NOT_ENABLED;
3685 error = clib_error_return (0, "ip6 not enabled for interface",
3686 format_unformat_error);
3692 set_ip6_link_local_address_cmd (vlib_main_t * vm,
3693 unformat_input_t * input,
3694 vlib_cli_command_t * cmd)
3696 vnet_main_t *vnm = vnet_get_main ();
3697 clib_error_t *error = 0;
3699 ip6_address_t ip6_addr;
3701 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3703 /* get the rest of the command */
3704 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3706 if (unformat (input, "%U", unformat_ip6_address, &ip6_addr))
3709 return (unformat_parse_error (input));
3712 error = set_ip6_link_local_address (vm, sw_if_index, &ip6_addr);
3717 * This command is used to assign an IPv6 Link-local address to an
3718 * interface. This command will enable IPv6 on an interface if it
3719 * is not already enabled. Use the '<em>show ip6 interface</em>' command
3720 * to display the assigned Link-local address.
3723 * Example of how to assign an IPv6 Link-local address to an interface:
3724 * @cliexcmd{set ip6 link-local address GigabitEthernet2/0/0 FE80::AB8}
3727 VLIB_CLI_COMMAND (set_ip6_link_local_address_command, static) =
3729 .path = "set ip6 link-local address",
3730 .short_help = "set ip6 link-local address <interface> <ip6-address>",
3731 .function = set_ip6_link_local_address_cmd,
3736 * @brief callback when an interface address is added or deleted
3739 ip6_neighbor_add_del_interface_address (ip6_main_t * im,
3742 ip6_address_t * address,
3744 u32 if_address_index, u32 is_delete)
3746 vnet_main_t *vnm = vnet_get_main ();
3747 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3749 vlib_main_t *vm = vnm->vlib_main;
3750 ip6_radv_t *radv_info;
3753 /* create solicited node multicast address for this interface adddress */
3754 ip6_set_solicited_node_multicast_address (&a, 0);
3756 a.as_u8[0xd] = address->as_u8[0xd];
3757 a.as_u8[0xe] = address->as_u8[0xe];
3758 a.as_u8[0xf] = address->as_u8[0xf];
3762 /* try to create radv_info - does nothing if ipv6 already enabled */
3763 enable_ip6_interface (vm, sw_if_index);
3765 /* look up the radv_t information for this interface */
3766 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3768 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3772 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3775 if (!ip6_address_is_link_local_unicast (address))
3776 radv_info->ref_count++;
3778 ip6_neighbor_add_mld_prefix (radv_info, &a);
3785 /* look up the radv_t information for this interface */
3786 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3788 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3793 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3795 ip6_neighbor_del_mld_prefix (radv_info, &a);
3797 /* if interface up send MLDP "report" */
3798 radv_info->all_routers_mcast = 0;
3801 if (!ip6_address_is_link_local_unicast (address))
3802 radv_info->ref_count--;
3804 /* Ensure that IPv6 is disabled, and LL removed after ref_count reaches 0 */
3805 disable_ip6_interface (vm, sw_if_index);
3810 ip6_set_neighbor_limit (u32 neighbor_limit)
3812 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3814 nm->limit_neighbor_cache_size = neighbor_limit;
3818 static clib_error_t *
3819 ip6_neighbor_init (vlib_main_t * vm)
3821 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3822 ip6_main_t *im = &ip6_main;
3824 mhash_init (&nm->neighbor_index_by_key,
3825 /* value size */ sizeof (uword),
3826 /* key size */ sizeof (ip6_neighbor_key_t));
3828 icmp6_register_type (vm, ICMP6_neighbor_solicitation,
3829 ip6_icmp_neighbor_solicitation_node.index);
3830 icmp6_register_type (vm, ICMP6_neighbor_advertisement,
3831 ip6_icmp_neighbor_advertisement_node.index);
3832 icmp6_register_type (vm, ICMP6_router_solicitation,
3833 ip6_icmp_router_solicitation_node.index);
3834 icmp6_register_type (vm, ICMP6_router_advertisement,
3835 ip6_icmp_router_advertisement_node.index);
3837 /* handler node for ip6 neighbor discovery events and timers */
3838 vlib_register_node (vm, &ip6_icmp_neighbor_discovery_event_node);
3840 /* add call backs */
3841 ip6_add_del_interface_address_callback_t cb;
3842 memset (&cb, 0x0, sizeof (ip6_add_del_interface_address_callback_t));
3844 /* when an interface address changes... */
3845 cb.function = ip6_neighbor_add_del_interface_address;
3846 cb.function_opaque = 0;
3847 vec_add1 (im->add_del_interface_address_callbacks, cb);
3849 mhash_init (&nm->pending_resolutions_by_address,
3850 /* value size */ sizeof (uword),
3851 /* key size */ sizeof (ip6_address_t));
3853 mhash_init (&nm->mac_changes_by_address,
3854 /* value size */ sizeof (uword),
3855 /* key size */ sizeof (ip6_address_t));
3857 /* default, configurable */
3858 nm->limit_neighbor_cache_size = 50000;
3861 /* $$$$ Hack fix for today */
3862 vec_validate_init_empty
3863 (im->discover_neighbor_next_index_by_hw_if_index, 32, 0 /* drop */ );
3869 VLIB_INIT_FUNCTION (ip6_neighbor_init);
3873 vnet_register_ip6_neighbor_resolution_event (vnet_main_t * vnm,
3876 uword type_opaque, uword data)
3878 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3879 ip6_address_t *address = address_arg;
3881 pending_resolution_t *pr;
3883 pool_get (nm->pending_resolutions, pr);
3885 pr->next_index = ~0;
3886 pr->node_index = node_index;
3887 pr->type_opaque = type_opaque;
3890 p = mhash_get (&nm->pending_resolutions_by_address, address);
3893 /* Insert new resolution at the head of the list */
3894 pr->next_index = p[0];
3895 mhash_unset (&nm->pending_resolutions_by_address, address, 0);
3898 mhash_set (&nm->pending_resolutions_by_address, address,
3899 pr - nm->pending_resolutions, 0 /* old value */ );
3903 vnet_add_del_ip6_nd_change_event (vnet_main_t * vnm,
3904 void *data_callback,
3908 uword type_opaque, uword data, int is_add)
3910 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3911 ip6_address_t *address = address_arg;
3913 pending_resolution_t *mc;
3914 void (*fp) (u32, u8 *) = data_callback;
3918 pool_get (nm->mac_changes, mc);
3920 mc->next_index = ~0;
3921 mc->node_index = node_index;
3922 mc->type_opaque = type_opaque;
3924 mc->data_callback = data_callback;
3927 p = mhash_get (&nm->mac_changes_by_address, address);
3930 /* Insert new resolution at the head of the list */
3931 mc->next_index = p[0];
3932 mhash_unset (&nm->mac_changes_by_address, address, 0);
3935 mhash_set (&nm->mac_changes_by_address, address,
3936 mc - nm->mac_changes, 0);
3942 pending_resolution_t *mc_last = 0;
3944 p = mhash_get (&nm->mac_changes_by_address, address);
3946 return VNET_API_ERROR_NO_SUCH_ENTRY;
3950 while (index != (u32) ~ 0)
3952 mc = pool_elt_at_index (nm->mac_changes, index);
3953 if (mc->node_index == node_index &&
3954 mc->type_opaque == type_opaque && mc->pid == pid)
3956 /* Clients may need to clean up pool entries, too */
3958 (*fp) (mc->data, 0 /* no new mac addrs */ );
3961 mhash_unset (&nm->mac_changes_by_address, address, 0);
3962 if (mc->next_index != ~0)
3963 mhash_set (&nm->mac_changes_by_address, address,
3965 pool_put (nm->mac_changes, mc);
3971 mc_last->next_index = mc->next_index;
3972 pool_put (nm->mac_changes, mc);
3977 index = mc->next_index;
3980 return VNET_API_ERROR_NO_SUCH_ENTRY;
3985 vnet_ip6_nd_term (vlib_main_t * vm,
3986 vlib_node_runtime_t * node,
3988 ethernet_header_t * eth,
3989 ip6_header_t * ip, u32 sw_if_index, u16 bd_index, u8 shg)
3991 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3992 icmp6_neighbor_solicitation_or_advertisement_header_t *ndh;
3993 pending_resolution_t *mc;
3996 ndh = ip6_next_header (ip);
3997 if (ndh->icmp.type != ICMP6_neighbor_solicitation &&
3998 ndh->icmp.type != ICMP6_neighbor_advertisement)
4001 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
4002 (p0->flags & VLIB_BUFFER_IS_TRACED)))
4004 u8 *t0 = vlib_add_trace (vm, node, p0,
4005 sizeof (icmp6_input_trace_t));
4006 clib_memcpy (t0, ip, sizeof (icmp6_input_trace_t));
4009 /* Check if anyone want ND events for L2 BDs */
4010 p = mhash_get (&nm->mac_changes_by_address, &ip6a_zero);
4011 if (p && shg == 0 && /* Only SHG 0 interface which is more likely local */
4012 !ip6_address_is_link_local_unicast (&ip->src_address))
4014 u32 next_index = p[0];
4015 while (next_index != (u32) ~ 0)
4017 int (*fp) (u32, u8 *, u32, ip6_address_t *);
4019 mc = pool_elt_at_index (nm->mac_changes, next_index);
4020 fp = mc->data_callback;
4021 /* Call the callback, return 1 to suppress dup events */
4023 rv = (*fp) (mc->data,
4024 eth->src_address, sw_if_index, &ip->src_address);
4025 /* Signal the resolver process */
4027 vlib_process_signal_event (vm, mc->node_index,
4028 mc->type_opaque, mc->data);
4029 next_index = mc->next_index;
4033 /* Check if MAC entry exsist for solicited target IP */
4034 if (ndh->icmp.type == ICMP6_neighbor_solicitation)
4036 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *opt;
4037 l2_bridge_domain_t *bd_config;
4040 opt = (void *) (ndh + 1);
4041 if ((opt->header.type !=
4042 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address) ||
4043 (opt->header.n_data_u64s != 1))
4044 return 0; /* source link layer address option not present */
4046 bd_config = vec_elt_at_index (l2input_main.bd_configs, bd_index);
4048 (u8 *) hash_get_mem (bd_config->mac_by_ip6, &ndh->target_address);
4050 { /* found ip-mac entry, generate eighbor advertisement response */
4052 vlib_node_runtime_t *error_node =
4053 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
4054 ip->dst_address = ip->src_address;
4055 ip->src_address = ndh->target_address;
4056 ip->hop_limit = 255;
4058 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
4059 clib_memcpy (opt->ethernet_address, macp, 6);
4060 ndh->icmp.type = ICMP6_neighbor_advertisement;
4061 ndh->advertisement_flags = clib_host_to_net_u32
4062 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED |
4063 ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
4064 ndh->icmp.checksum = 0;
4065 ndh->icmp.checksum =
4066 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip, &bogus_length);
4067 clib_memcpy (eth->dst_address, eth->src_address, 6);
4068 clib_memcpy (eth->src_address, macp, 6);
4069 vlib_error_count (vm, error_node->node_index,
4070 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX, 1);
4080 ip6_neighbor_proxy_add_del (u32 sw_if_index, ip6_address_t * addr, u8 is_del)
4084 fib_prefix_t pfx = {
4086 .fp_proto = FIB_PROTOCOL_IP6,
4091 ip46_address_t nh = {
4095 fib_index = ip6_fib_table_get_index_for_sw_if_index (sw_if_index);
4097 if (~0 == fib_index)
4098 return VNET_API_ERROR_NO_SUCH_FIB;
4102 fib_table_entry_path_remove (fib_index,
4104 FIB_SOURCE_IP6_ND_PROXY,
4108 ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
4109 /* flush the ND cache of this address if it's there */
4110 vnet_unset_ip6_ethernet_neighbor (vlib_get_main (),
4111 sw_if_index, addr, NULL, 0);
4115 fib_table_entry_path_add (fib_index,
4117 FIB_SOURCE_IP6_ND_PROXY,
4118 FIB_ENTRY_FLAG_NONE,
4122 ~0, 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
4127 static clib_error_t *
4128 set_ip6_nd_proxy_cmd (vlib_main_t * vm,
4129 unformat_input_t * input, vlib_cli_command_t * cmd)
4131 vnet_main_t *vnm = vnet_get_main ();
4132 clib_error_t *error = 0;
4137 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4139 /* get the rest of the command */
4140 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
4142 if (unformat (input, "%U", unformat_ip6_address, &addr))
4144 else if (unformat (input, "delete") || unformat (input, "del"))
4147 return (unformat_parse_error (input));
4151 ip6_neighbor_proxy_add_del (sw_if_index, &addr, is_del);
4157 VLIB_CLI_COMMAND (set_ip6_nd_proxy_command, static) =
4159 .path = "set ip6 nd proxy",
4160 .short_help = "set ip6 nd proxy <HOST> <INTERFACE>",
4161 .function = set_ip6_nd_proxy_cmd,
4166 ethernet_ndp_change_mac (u32 sw_if_index)
4168 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4172 pool_foreach (n, nm->neighbor_pool,
4174 if (n->key.sw_if_index == sw_if_index)
4176 adj_nbr_walk_nh6 (sw_if_index,
4177 &n->key.ip6_address,
4178 ip6_nd_mk_complete_walk, n);
4185 * fd.io coding-style-patch-verification: ON
4188 * eval: (c-set-style "gnu")