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:
535 * Construct a partial rewrite from the known ethernet mcast dest MAC
540 rewrite = ethernet_build_rewrite (vnm,
543 ethernet_ip6_mcast_dst_addr ());
546 * Complete the remaining fields of the adj's rewrite to direct the
547 * complete of the rewrite at switch time by copying in the IP
548 * dst address's bytes.
549 * Ofset is 2 bytes into the desintation address. And we write 4 bytes.
551 offset = vec_len (rewrite) - 2;
552 adj_mcast_update_rewrite (ai, rewrite, offset, 0xffffffff);
556 case IP_LOOKUP_NEXT_DROP:
557 case IP_LOOKUP_NEXT_PUNT:
558 case IP_LOOKUP_NEXT_LOCAL:
559 case IP_LOOKUP_NEXT_REWRITE:
560 case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
561 case IP_LOOKUP_NEXT_MIDCHAIN:
562 case IP_LOOKUP_NEXT_ICMP_ERROR:
563 case IP_LOOKUP_N_NEXT:
570 vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
573 u8 * link_layer_address,
574 uword n_bytes_link_layer_address,
575 int is_static, int is_no_fib_entry)
577 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
578 ip6_neighbor_key_t k;
579 ip6_neighbor_t *n = 0;
580 int make_new_nd_cache_entry = 1;
583 pending_resolution_t *pr, *mc;
585 if (vlib_get_thread_index ())
587 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
588 1 /* set new neighbor */ , is_static,
593 k.sw_if_index = sw_if_index;
594 k.ip6_address = a[0];
597 p = mhash_get (&nm->neighbor_index_by_key, &k);
600 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
601 /* Refuse to over-write static neighbor entry. */
602 if (!is_static && (n->flags & IP6_NEIGHBOR_FLAG_STATIC))
604 make_new_nd_cache_entry = 0;
607 if (make_new_nd_cache_entry)
609 pool_get (nm->neighbor_pool, n);
610 mhash_set (&nm->neighbor_index_by_key, &k, n - nm->neighbor_pool,
614 clib_memcpy (n->link_layer_address,
615 link_layer_address, n_bytes_link_layer_address);
618 * create the adj-fib. the entry in the FIB table for and to the peer.
620 if (!is_no_fib_entry)
624 .fp_proto = FIB_PROTOCOL_IP6,
625 .fp_addr.ip6 = k.ip6_address,
629 fib_index = ip6_main.fib_index_by_sw_if_index[n->key.sw_if_index];
631 fib_table_entry_update_one_path (fib_index, &pfx,
634 FIB_PROTOCOL_IP6, &pfx.fp_addr,
635 n->key.sw_if_index, ~0, 1, NULL,
636 FIB_ROUTE_PATH_FLAG_NONE);
637 n->flags |= IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY;
643 * prevent a DoS attack from the data-plane that
644 * spams us with no-op updates to the MAC address
646 if (0 == memcmp (n->link_layer_address,
647 link_layer_address, n_bytes_link_layer_address))
650 clib_memcpy (n->link_layer_address,
651 link_layer_address, n_bytes_link_layer_address);
654 /* Update time stamp and flags. */
655 n->cpu_time_last_updated = clib_cpu_time_now ();
657 n->flags |= IP6_NEIGHBOR_FLAG_STATIC;
659 n->flags |= IP6_NEIGHBOR_FLAG_DYNAMIC;
661 adj_nbr_walk_nh6 (sw_if_index,
662 &n->key.ip6_address, ip6_nd_mk_complete_walk, n);
664 /* Customer(s) waiting for this address to be resolved? */
665 p = mhash_get (&nm->pending_resolutions_by_address, a);
670 while (next_index != (u32) ~ 0)
672 pr = pool_elt_at_index (nm->pending_resolutions, next_index);
673 vlib_process_signal_event (vm, pr->node_index,
674 pr->type_opaque, pr->data);
675 next_index = pr->next_index;
676 pool_put (nm->pending_resolutions, pr);
679 mhash_unset (&nm->pending_resolutions_by_address, a, 0);
682 /* Customer(s) requesting ND event for this address? */
683 p = mhash_get (&nm->mac_changes_by_address, a);
688 while (next_index != (u32) ~ 0)
690 int (*fp) (u32, u8 *, u32, ip6_address_t *);
692 mc = pool_elt_at_index (nm->mac_changes, next_index);
693 fp = mc->data_callback;
695 /* Call the user's data callback, return 1 to suppress dup events */
698 (*fp) (mc->data, link_layer_address, sw_if_index, &ip6a_zero);
700 * Signal the resolver process, as long as the user
701 * says they want to be notified
704 vlib_process_signal_event (vm, mc->node_index,
705 mc->type_opaque, mc->data);
706 next_index = mc->next_index;
714 vnet_unset_ip6_ethernet_neighbor (vlib_main_t * vm,
717 u8 * link_layer_address,
718 uword n_bytes_link_layer_address)
720 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
721 ip6_neighbor_key_t k;
726 if (vlib_get_thread_index ())
728 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
729 0 /* unset */ , 0, 0);
733 k.sw_if_index = sw_if_index;
734 k.ip6_address = a[0];
737 p = mhash_get (&nm->neighbor_index_by_key, &k);
744 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
745 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
747 adj_nbr_walk_nh6 (sw_if_index,
748 &n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL);
750 fib_table_entry_delete_index (n->fib_entry_index, FIB_SOURCE_ADJ);
751 pool_put (nm->neighbor_pool, n);
757 static void ip6_neighbor_set_unset_rpc_callback
758 (ip6_neighbor_set_unset_rpc_args_t * a)
760 vlib_main_t *vm = vlib_get_main ();
762 vnet_set_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
763 a->link_layer_address, 6, a->is_static,
766 vnet_unset_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
767 a->link_layer_address, 6);
771 ip6_neighbor_sort (void *a1, void *a2)
773 vnet_main_t *vnm = vnet_get_main ();
774 ip6_neighbor_t *n1 = a1, *n2 = a2;
776 cmp = vnet_sw_interface_compare (vnm, n1->key.sw_if_index,
777 n2->key.sw_if_index);
779 cmp = ip6_address_compare (&n1->key.ip6_address, &n2->key.ip6_address);
784 ip6_neighbors_entries (u32 sw_if_index)
786 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
787 ip6_neighbor_t *n, *ns = 0;
790 pool_foreach (n, nm->neighbor_pool,
792 if (sw_if_index != ~0 && n->key.sw_if_index != sw_if_index)
799 vec_sort_with_function (ns, ip6_neighbor_sort);
803 static clib_error_t *
804 show_ip6_neighbors (vlib_main_t * vm,
805 unformat_input_t * input, vlib_cli_command_t * cmd)
807 vnet_main_t *vnm = vnet_get_main ();
808 ip6_neighbor_t *n, *ns;
809 clib_error_t *error = 0;
812 /* Filter entries by interface if given. */
814 (void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index);
816 ns = ip6_neighbors_entries (sw_if_index);
819 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, 0);
822 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, n);
831 * This command is used to display the adjacent IPv6 hosts found via
832 * neighbor discovery. Optionally, limit the output to the specified
836 * Example of how to display the IPv6 neighbor adjacency table:
837 * @cliexstart{show ip6 neighbors}
838 * Time Address Flags Link layer Interface
839 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
840 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
841 * 886.6654 ::1:1:c:0:9 S 02:fe:e4:45:27:5b GigabitEthernet3/0/0
843 * Example of how to display the IPv6 neighbor adjacency table for given interface:
844 * @cliexstart{show ip6 neighbors GigabitEthernet2/0/0}
845 * Time Address Flags Link layer Interface
846 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
847 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
851 VLIB_CLI_COMMAND (show_ip6_neighbors_command, static) = {
852 .path = "show ip6 neighbors",
853 .function = show_ip6_neighbors,
854 .short_help = "show ip6 neighbors [<interface>]",
858 static clib_error_t *
859 set_ip6_neighbor (vlib_main_t * vm,
860 unformat_input_t * input, vlib_cli_command_t * cmd)
862 vnet_main_t *vnm = vnet_get_main ();
868 int is_no_fib_entry = 0;
871 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
873 /* intfc, ip6-address, mac-address */
874 if (unformat (input, "%U %U %U",
875 unformat_vnet_sw_interface, vnm, &sw_if_index,
876 unformat_ip6_address, &addr,
877 unformat_ethernet_address, mac_address))
880 else if (unformat (input, "delete") || unformat (input, "del"))
882 else if (unformat (input, "static"))
884 else if (unformat (input, "no-fib-entry"))
891 return clib_error_return (0, "Missing interface, ip6 or hw address");
894 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
895 mac_address, sizeof (mac_address),
896 is_static, is_no_fib_entry);
898 vnet_unset_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
899 mac_address, sizeof (mac_address));
904 * This command is used to manually add an entry to the IPv6 neighbor
905 * adjacency table. Optionally, the entry can be added as static. It is
906 * also used to remove an entry from the table. Use the '<em>show ip6
907 * neighbors</em>' command to display all learned and manually entered entries.
910 * Example of how to add a static entry to the IPv6 neighbor adjacency table:
911 * @cliexcmd{set ip6 neighbor GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b static}
912 * Example of how to delete an entry from the IPv6 neighbor adjacency table:
913 * @cliexcmd{set ip6 neighbor del GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b}
916 VLIB_CLI_COMMAND (set_ip6_neighbor_command, static) =
918 .path = "set ip6 neighbor",
919 .function = set_ip6_neighbor,
920 .short_help = "set ip6 neighbor [del] <interface> <ip6-address> <mac-address> [static]",
926 ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP,
927 ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY,
928 ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
929 } icmp6_neighbor_solicitation_or_advertisement_next_t;
931 static_always_inline uword
932 icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
933 vlib_node_runtime_t * node,
934 vlib_frame_t * frame,
935 uword is_solicitation)
937 vnet_main_t *vnm = vnet_get_main ();
938 ip6_main_t *im = &ip6_main;
939 uword n_packets = frame->n_vectors;
941 u32 n_left_from, n_left_to_next, next_index, n_advertisements_sent;
942 icmp6_neighbor_discovery_option_type_t option_type;
943 vlib_node_runtime_t *error_node =
944 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
947 from = vlib_frame_vector_args (frame);
948 n_left_from = n_packets;
949 next_index = node->cached_next_index;
951 if (node->flags & VLIB_NODE_FLAG_TRACE)
952 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
954 sizeof (icmp6_input_trace_t));
958 ? ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address
959 : ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address);
960 n_advertisements_sent = 0;
962 while (n_left_from > 0)
964 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
966 while (n_left_from > 0 && n_left_to_next > 0)
970 icmp6_neighbor_solicitation_or_advertisement_header_t *h0;
971 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
972 u32 bi0, options_len0, sw_if_index0, next0, error0;
973 u32 ip6_sadd_link_local, ip6_sadd_unspecified;
977 bi0 = to_next[0] = from[0];
984 p0 = vlib_get_buffer (vm, bi0);
985 ip0 = vlib_buffer_get_current (p0);
986 h0 = ip6_next_header (ip0);
988 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
990 error0 = ICMP6_ERROR_NONE;
991 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
992 ip6_sadd_link_local =
993 ip6_address_is_link_local_unicast (&ip0->src_address);
994 ip6_sadd_unspecified =
995 ip6_address_is_unspecified (&ip0->src_address);
997 /* Check that source address is unspecified, link-local or else on-link. */
998 if (!ip6_sadd_unspecified && !ip6_sadd_link_local)
1000 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1002 if (ADJ_INDEX_INVALID != src_adj_index0)
1004 ip_adjacency_t *adj0 =
1005 ip_get_adjacency (&im->lookup_main, src_adj_index0);
1007 /* Allow all realistic-looking rewrite adjacencies to pass */
1008 ni0 = adj0->lookup_next_index;
1009 is_rewrite0 = (ni0 >= IP_LOOKUP_NEXT_ARP) &&
1010 (ni0 < IP6_LOOKUP_N_NEXT);
1012 error0 = ((adj0->rewrite_header.sw_if_index != sw_if_index0
1015 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK
1021 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK;
1025 o0 = (void *) (h0 + 1);
1026 o0 = ((options_len0 == 8 && o0->header.type == option_type
1027 && o0->header.n_data_u64s == 1) ? o0 : 0);
1029 /* If src address unspecified or link local, donot learn neighbor MAC */
1030 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1031 !ip6_sadd_unspecified && !ip6_sadd_link_local))
1033 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1034 if (nm->limit_neighbor_cache_size &&
1035 pool_elts (nm->neighbor_pool) >=
1036 nm->limit_neighbor_cache_size)
1037 unset_random_neighbor_entry ();
1038 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1041 &h0->target_address,
1042 o0->ethernet_address,
1043 sizeof (o0->ethernet_address),
1047 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1049 /* Check that target address is local to this router. */
1050 fib_node_index_t fei;
1054 ip6_fib_table_get_index_for_sw_if_index (sw_if_index0);
1056 if (~0 == fib_index)
1058 error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1062 fei = ip6_fib_table_lookup_exact_match (fib_index,
1063 &h0->target_address,
1066 if (FIB_NODE_INDEX_INVALID == fei)
1068 /* The target address is not in the FIB */
1070 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1074 if (FIB_ENTRY_FLAG_LOCAL &
1075 fib_entry_get_flags_for_source (fei,
1076 FIB_SOURCE_INTERFACE))
1078 /* It's an address that belongs to one of our interfaces
1082 if (fib_entry_is_sourced
1083 (fei, FIB_SOURCE_IP6_ND_PROXY))
1085 /* The address was added by IPv6 Proxy ND config.
1086 * We should only respond to these if the NS arrived on
1087 * the link that has a matching covering prefix */
1092 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1098 if (is_solicitation)
1099 next0 = (error0 != ICMP6_ERROR_NONE
1100 ? ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP
1101 : ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY);
1105 error0 = error0 == ICMP6_ERROR_NONE ?
1106 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_RX : error0;
1109 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1111 vnet_sw_interface_t *sw_if0;
1112 ethernet_interface_t *eth_if0;
1113 ethernet_header_t *eth0;
1115 /* dst address is either source address or the all-nodes mcast addr */
1116 if (!ip6_sadd_unspecified)
1117 ip0->dst_address = ip0->src_address;
1119 ip6_set_reserved_multicast_address (&ip0->dst_address,
1120 IP6_MULTICAST_SCOPE_link_local,
1121 IP6_MULTICAST_GROUP_ID_all_hosts);
1123 ip0->src_address = h0->target_address;
1124 ip0->hop_limit = 255;
1125 h0->icmp.type = ICMP6_neighbor_advertisement;
1127 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1128 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1130 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1133 clib_memcpy (o0->ethernet_address, eth_if0->address, 6);
1135 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
1138 h0->advertisement_flags = clib_host_to_net_u32
1139 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED
1140 | ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
1142 h0->icmp.checksum = 0;
1144 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1146 ASSERT (bogus_length == 0);
1148 /* Reuse current MAC header, copy SMAC to DMAC and
1149 * interface MAC to SMAC */
1150 vlib_buffer_advance (p0, -ethernet_buffer_header_size (p0));
1151 eth0 = vlib_buffer_get_current (p0);
1152 clib_memcpy (eth0->dst_address, eth0->src_address, 6);
1154 clib_memcpy (eth0->src_address, eth_if0->address, 6);
1156 /* Setup input and output sw_if_index for packet */
1157 ASSERT (vnet_buffer (p0)->sw_if_index[VLIB_RX] == sw_if_index0);
1158 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1159 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1160 vnet_main.local_interface_sw_if_index;
1162 n_advertisements_sent++;
1165 p0->error = error_node->errors[error0];
1167 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1168 to_next, n_left_to_next,
1172 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1175 /* Account for advertisements sent. */
1176 vlib_error_count (vm, error_node->node_index,
1177 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX,
1178 n_advertisements_sent);
1180 return frame->n_vectors;
1183 /* for "syslogging" - use elog for now */
1184 #define foreach_log_level \
1185 _ (DEBUG, "DEBUG") \
1186 _ (INFO, "INFORMATION") \
1187 _ (NOTICE, "NOTICE") \
1188 _ (WARNING, "WARNING") \
1190 _ (CRIT, "CRITICAL") \
1191 _ (ALERT, "ALERT") \
1192 _ (EMERG, "EMERGENCY")
1196 #define _(f,s) LOG_##f,
1201 static char *log_level_strings[] = {
1207 static int logmask = 1 << LOG_DEBUG;
1210 ip6_neighbor_syslog (vlib_main_t * vm, int priority, char *fmt, ...)
1212 /* just use elog for now */
1216 if ((priority > LOG_EMERG) || !(logmask & (1 << priority)))
1222 what = va_format (0, fmt, &va);
1224 ELOG_TYPE_DECLARE (e) =
1226 .format = "ip6 nd: (%s): %s",.format_args = "T4T4",};
1231 ed = ELOG_DATA (&vm->elog_main, e);
1232 ed->s[0] = elog_string (&vm->elog_main, log_level_strings[priority]);
1233 ed->s[1] = elog_string (&vm->elog_main, (char *) what);
1239 /* ipv6 neighbor discovery - router advertisements */
1242 ICMP6_ROUTER_SOLICITATION_NEXT_DROP,
1243 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW,
1244 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX,
1245 ICMP6_ROUTER_SOLICITATION_N_NEXT,
1246 } icmp6_router_solicitation_or_advertisement_next_t;
1248 static_always_inline uword
1249 icmp6_router_solicitation (vlib_main_t * vm,
1250 vlib_node_runtime_t * node, vlib_frame_t * frame)
1252 vnet_main_t *vnm = vnet_get_main ();
1253 ip6_main_t *im = &ip6_main;
1254 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1255 uword n_packets = frame->n_vectors;
1256 u32 *from, *to_next;
1257 u32 n_left_from, n_left_to_next, next_index;
1258 u32 n_advertisements_sent = 0;
1261 icmp6_neighbor_discovery_option_type_t option_type;
1263 vlib_node_runtime_t *error_node =
1264 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1266 from = vlib_frame_vector_args (frame);
1267 n_left_from = n_packets;
1268 next_index = node->cached_next_index;
1270 if (node->flags & VLIB_NODE_FLAG_TRACE)
1271 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1273 sizeof (icmp6_input_trace_t));
1275 /* source may append his LL address */
1276 option_type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1278 while (n_left_from > 0)
1280 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1282 while (n_left_from > 0 && n_left_to_next > 0)
1286 ip6_radv_t *radv_info = 0;
1288 icmp6_neighbor_discovery_header_t *h0;
1289 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1291 u32 bi0, options_len0, sw_if_index0, next0, error0;
1292 u32 is_solicitation = 1, is_dropped = 0;
1293 u32 is_unspecified, is_link_local;
1295 bi0 = to_next[0] = from[0];
1300 n_left_to_next -= 1;
1302 p0 = vlib_get_buffer (vm, bi0);
1303 ip0 = vlib_buffer_get_current (p0);
1304 h0 = ip6_next_header (ip0);
1306 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1307 is_unspecified = ip6_address_is_unspecified (&ip0->src_address);
1309 ip6_address_is_link_local_unicast (&ip0->src_address);
1311 error0 = ICMP6_ERROR_NONE;
1312 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1314 /* check if solicitation (not from nd_timer node) */
1315 if (ip6_address_is_unspecified (&ip0->dst_address))
1316 is_solicitation = 0;
1318 /* Check that source address is unspecified, link-local or else on-link. */
1319 if (!is_unspecified && !is_link_local)
1321 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1323 if (ADJ_INDEX_INVALID != src_adj_index0)
1325 ip_adjacency_t *adj0 = ip_get_adjacency (&im->lookup_main,
1328 error0 = (adj0->rewrite_header.sw_if_index != sw_if_index0
1330 ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK
1335 error0 = ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK;
1339 /* check for source LL option and process */
1340 o0 = (void *) (h0 + 1);
1341 o0 = ((options_len0 == 8
1342 && o0->header.type == option_type
1343 && o0->header.n_data_u64s == 1) ? o0 : 0);
1345 /* if src address unspecified IGNORE any options */
1346 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1347 !is_unspecified && !is_link_local))
1349 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1350 if (nm->limit_neighbor_cache_size &&
1351 pool_elts (nm->neighbor_pool) >=
1352 nm->limit_neighbor_cache_size)
1353 unset_random_neighbor_entry ();
1355 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1357 o0->ethernet_address,
1358 sizeof (o0->ethernet_address),
1362 /* default is to drop */
1363 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1365 if (error0 == ICMP6_ERROR_NONE)
1367 vnet_sw_interface_t *sw_if0;
1368 ethernet_interface_t *eth_if0;
1371 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1372 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1374 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1376 /* only support ethernet interface type for now */
1378 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1381 if (error0 == ICMP6_ERROR_NONE)
1385 /* adjust the sizeof the buffer to just include the ipv6 header */
1386 p0->current_length -=
1388 sizeof (icmp6_neighbor_discovery_header_t));
1390 /* look up the radv_t information for this interface */
1391 vec_validate_init_empty
1392 (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
1394 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1397 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1401 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1404 if (error0 == ICMP6_ERROR_NONE)
1406 f64 now = vlib_time_now (vm);
1408 /* for solicited adverts - need to rate limit */
1409 if (is_solicitation)
1411 if (0 != radv_info->last_radv_time &&
1412 (now - radv_info->last_radv_time) <
1413 MIN_DELAY_BETWEEN_RAS)
1416 radv_info->last_radv_time = now;
1420 icmp6_router_advertisement_header_t rh;
1422 rh.icmp.type = ICMP6_router_advertisement;
1424 rh.icmp.checksum = 0;
1426 rh.current_hop_limit = radv_info->curr_hop_limit;
1427 rh.router_lifetime_in_sec =
1428 clib_host_to_net_u16
1429 (radv_info->adv_router_lifetime_in_sec);
1431 time_in_msec_between_retransmitted_neighbor_solicitations
1433 clib_host_to_net_u32 (radv_info->
1434 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
1435 rh.neighbor_reachable_time_in_msec =
1436 clib_host_to_net_u32 (radv_info->
1437 adv_neighbor_reachable_time_in_msec);
1440 (radv_info->adv_managed_flag) ?
1441 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP :
1444 ((radv_info->adv_other_flag) ?
1445 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP :
1449 u16 payload_length =
1450 sizeof (icmp6_router_advertisement_header_t);
1452 vlib_buffer_add_data (vm,
1453 p0->free_list_index,
1457 (icmp6_router_advertisement_header_t));
1459 if (radv_info->adv_link_layer_address)
1461 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
1465 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1466 h.header.n_data_u64s = 1;
1468 /* copy ll address */
1469 clib_memcpy (&h.ethernet_address[0],
1470 eth_if0->address, 6);
1472 vlib_buffer_add_data (vm,
1473 p0->free_list_index,
1477 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t));
1481 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t);
1484 /* add MTU option */
1485 if (radv_info->adv_link_mtu)
1487 icmp6_neighbor_discovery_mtu_option_t h;
1491 clib_host_to_net_u32 (radv_info->adv_link_mtu);
1492 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu;
1493 h.header.n_data_u64s = 1;
1496 sizeof (icmp6_neighbor_discovery_mtu_option_t);
1498 vlib_buffer_add_data (vm,
1499 p0->free_list_index,
1503 (icmp6_neighbor_discovery_mtu_option_t));
1506 /* add advertised prefix options */
1507 ip6_radv_prefix_t *pr_info;
1510 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
1512 if(pr_info->enabled &&
1513 (!pr_info->decrement_lifetime_flag
1514 || (pr_info->pref_lifetime_expires >0)))
1516 /* advertise this prefix */
1517 icmp6_neighbor_discovery_prefix_information_option_t h;
1519 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information;
1520 h.header.n_data_u64s = (sizeof(icmp6_neighbor_discovery_prefix_information_option_t) >> 3);
1522 h.dst_address_length = pr_info->prefix_len;
1524 h.flags = (pr_info->adv_on_link_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_FLAG_ON_LINK : 0;
1525 h.flags |= (pr_info->adv_autonomous_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_AUTO : 0;
1527 if(radv_info->cease_radv && pr_info->deprecated_prefix_flag)
1529 h.valid_time = clib_host_to_net_u32(MIN_ADV_VALID_LIFETIME);
1530 h.preferred_time = 0;
1534 if(pr_info->decrement_lifetime_flag)
1536 pr_info->adv_valid_lifetime_in_secs = ((pr_info->valid_lifetime_expires > now)) ?
1537 (pr_info->valid_lifetime_expires - now) : 0;
1539 pr_info->adv_pref_lifetime_in_secs = ((pr_info->pref_lifetime_expires > now)) ?
1540 (pr_info->pref_lifetime_expires - now) : 0;
1543 h.valid_time = clib_host_to_net_u32(pr_info->adv_valid_lifetime_in_secs);
1544 h.preferred_time = clib_host_to_net_u32(pr_info->adv_pref_lifetime_in_secs) ;
1548 clib_memcpy(&h.dst_address, &pr_info->prefix, sizeof(ip6_address_t));
1550 payload_length += sizeof( icmp6_neighbor_discovery_prefix_information_option_t);
1552 vlib_buffer_add_data (vm,
1553 p0->free_list_index,
1555 (void *)&h, sizeof(icmp6_neighbor_discovery_prefix_information_option_t));
1561 /* add additional options before here */
1563 /* finish building the router advertisement... */
1564 if (!is_unspecified && radv_info->send_unicast)
1566 ip0->dst_address = ip0->src_address;
1570 /* target address is all-nodes mcast addr */
1571 ip6_set_reserved_multicast_address
1573 IP6_MULTICAST_SCOPE_link_local,
1574 IP6_MULTICAST_GROUP_ID_all_hosts);
1577 /* source address MUST be the link-local address */
1578 ip0->src_address = radv_info->link_local_address;
1580 ip0->hop_limit = 255;
1581 ip0->payload_length =
1582 clib_host_to_net_u16 (payload_length);
1584 icmp6_router_advertisement_header_t *rh0 =
1585 (icmp6_router_advertisement_header_t *) (ip0 + 1);
1586 rh0->icmp.checksum =
1587 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1589 ASSERT (bogus_length == 0);
1591 /* setup output if and adjacency */
1592 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1593 vnet_main.local_interface_sw_if_index;
1595 if (is_solicitation)
1597 ethernet_header_t *eth0;
1598 /* Reuse current MAC header, copy SMAC to DMAC and
1599 * interface MAC to SMAC */
1600 vlib_buffer_reset (p0);
1601 eth0 = vlib_buffer_get_current (p0);
1602 clib_memcpy (eth0->dst_address, eth0->src_address,
1604 clib_memcpy (eth0->src_address, eth_if0->address,
1607 is_dropped ? next0 :
1608 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX;
1609 vnet_buffer (p0)->sw_if_index[VLIB_TX] =
1614 adj_index0 = radv_info->mcast_adj_index;
1615 if (adj_index0 == 0)
1616 error0 = ICMP6_ERROR_DST_LOOKUP_MISS;
1620 is_dropped ? next0 :
1621 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW;
1622 vnet_buffer (p0)->ip.adj_index[VLIB_TX] =
1626 p0->flags |= VNET_BUFFER_LOCALLY_ORIGINATED;
1628 radv_info->n_solicitations_dropped += is_dropped;
1629 radv_info->n_solicitations_rcvd += is_solicitation;
1631 if ((error0 == ICMP6_ERROR_NONE) && !is_dropped)
1633 radv_info->n_advertisements_sent++;
1634 n_advertisements_sent++;
1640 p0->error = error_node->errors[error0];
1642 if (error0 != ICMP6_ERROR_NONE)
1643 vlib_error_count (vm, error_node->node_index, error0, 1);
1645 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1646 to_next, n_left_to_next,
1651 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1654 /* Account for router advertisements sent. */
1655 vlib_error_count (vm, error_node->node_index,
1656 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_TX,
1657 n_advertisements_sent);
1659 return frame->n_vectors;
1662 /* validate advertised info for consistancy (see RFC-4861 section 6.2.7) - log any inconsistencies, packet will always be dropped */
1663 static_always_inline uword
1664 icmp6_router_advertisement (vlib_main_t * vm,
1665 vlib_node_runtime_t * node, vlib_frame_t * frame)
1667 vnet_main_t *vnm = vnet_get_main ();
1668 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1669 uword n_packets = frame->n_vectors;
1670 u32 *from, *to_next;
1671 u32 n_left_from, n_left_to_next, next_index;
1672 u32 n_advertisements_rcvd = 0;
1674 vlib_node_runtime_t *error_node =
1675 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1677 from = vlib_frame_vector_args (frame);
1678 n_left_from = n_packets;
1679 next_index = node->cached_next_index;
1681 if (node->flags & VLIB_NODE_FLAG_TRACE)
1682 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1684 sizeof (icmp6_input_trace_t));
1686 while (n_left_from > 0)
1688 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1690 while (n_left_from > 0 && n_left_to_next > 0)
1694 ip6_radv_t *radv_info = 0;
1695 icmp6_router_advertisement_header_t *h0;
1696 u32 bi0, options_len0, sw_if_index0, next0, error0;
1698 bi0 = to_next[0] = from[0];
1703 n_left_to_next -= 1;
1705 p0 = vlib_get_buffer (vm, bi0);
1706 ip0 = vlib_buffer_get_current (p0);
1707 h0 = ip6_next_header (ip0);
1709 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1711 error0 = ICMP6_ERROR_NONE;
1712 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1714 /* Check that source address is link-local */
1715 error0 = (!ip6_address_is_link_local_unicast (&ip0->src_address)) ?
1716 ICMP6_ERROR_ROUTER_ADVERTISEMENT_SOURCE_NOT_LINK_LOCAL : error0;
1718 /* default is to drop */
1719 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1721 n_advertisements_rcvd++;
1723 if (error0 == ICMP6_ERROR_NONE)
1725 vnet_sw_interface_t *sw_if0;
1726 ethernet_interface_t *eth_if0;
1728 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1729 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1731 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1733 /* only support ethernet interface type for now */
1735 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1738 if (error0 == ICMP6_ERROR_NONE)
1742 /* look up the radv_t information for this interface */
1743 vec_validate_init_empty
1744 (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
1746 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1749 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1753 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1756 if (error0 == ICMP6_ERROR_NONE)
1758 /* validate advertised information */
1759 if ((h0->current_hop_limit && radv_info->curr_hop_limit)
1760 && (h0->current_hop_limit !=
1761 radv_info->curr_hop_limit))
1763 ip6_neighbor_syslog (vm, LOG_WARNING,
1764 "our AdvCurHopLimit on %U doesn't agree with %U",
1765 format_vnet_sw_if_index_name,
1772 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP)
1773 != radv_info->adv_managed_flag)
1775 ip6_neighbor_syslog (vm, LOG_WARNING,
1776 "our AdvManagedFlag on %U doesn't agree with %U",
1777 format_vnet_sw_if_index_name,
1784 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP)
1785 != radv_info->adv_other_flag)
1787 ip6_neighbor_syslog (vm, LOG_WARNING,
1788 "our AdvOtherConfigFlag on %U doesn't agree with %U",
1789 format_vnet_sw_if_index_name,
1796 time_in_msec_between_retransmitted_neighbor_solicitations
1798 adv_time_in_msec_between_retransmitted_neighbor_solicitations)
1800 time_in_msec_between_retransmitted_neighbor_solicitations
1802 clib_host_to_net_u32 (radv_info->
1803 adv_time_in_msec_between_retransmitted_neighbor_solicitations)))
1805 ip6_neighbor_syslog (vm, LOG_WARNING,
1806 "our AdvRetransTimer on %U doesn't agree with %U",
1807 format_vnet_sw_if_index_name,
1813 if ((h0->neighbor_reachable_time_in_msec &&
1814 radv_info->adv_neighbor_reachable_time_in_msec) &&
1815 (h0->neighbor_reachable_time_in_msec !=
1816 clib_host_to_net_u32
1817 (radv_info->adv_neighbor_reachable_time_in_msec)))
1819 ip6_neighbor_syslog (vm, LOG_WARNING,
1820 "our AdvReachableTime on %U doesn't agree with %U",
1821 format_vnet_sw_if_index_name,
1827 /* check for MTU or prefix options or .. */
1828 u8 *opt_hdr = (u8 *) (h0 + 1);
1829 while (options_len0 > 0)
1831 icmp6_neighbor_discovery_option_header_t *o0 =
1832 (icmp6_neighbor_discovery_option_header_t *)
1834 int opt_len = o0->n_data_u64s << 3;
1835 icmp6_neighbor_discovery_option_type_t option_type =
1838 if (options_len0 < 2)
1840 ip6_neighbor_syslog (vm, LOG_ERR,
1841 "malformed RA packet on %U from %U",
1842 format_vnet_sw_if_index_name,
1851 ip6_neighbor_syslog (vm, LOG_ERR,
1852 " zero length option in RA on %U from %U",
1853 format_vnet_sw_if_index_name,
1859 else if (opt_len > options_len0)
1861 ip6_neighbor_syslog (vm, LOG_ERR,
1862 "option length in RA packet greater than total length on %U from %U",
1863 format_vnet_sw_if_index_name,
1870 options_len0 -= opt_len;
1873 switch (option_type)
1875 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu:
1877 icmp6_neighbor_discovery_mtu_option_t *h =
1878 (icmp6_neighbor_discovery_mtu_option_t
1881 if (opt_len < sizeof (*h))
1884 if ((h->mtu && radv_info->adv_link_mtu) &&
1886 clib_host_to_net_u32
1887 (radv_info->adv_link_mtu)))
1889 ip6_neighbor_syslog (vm, LOG_WARNING,
1890 "our AdvLinkMTU on %U doesn't agree with %U",
1891 format_vnet_sw_if_index_name,
1899 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information:
1901 icmp6_neighbor_discovery_prefix_information_option_t
1903 (icmp6_neighbor_discovery_prefix_information_option_t
1906 /* validate advertised prefix options */
1907 ip6_radv_prefix_t *pr_info;
1908 u32 preferred, valid;
1910 if (opt_len < sizeof (*h))
1914 clib_net_to_host_u32 (h->preferred_time);
1915 valid = clib_net_to_host_u32 (h->valid_time);
1917 /* look for matching prefix - if we our advertising it, it better be consistant */
1919 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
1923 ip6_address_mask_from_width(&mask, pr_info->prefix_len);
1925 if(pr_info->enabled &&
1926 (pr_info->prefix_len == h->dst_address_length) &&
1927 ip6_address_is_equal_masked (&pr_info->prefix, &h->dst_address, &mask))
1930 if(!pr_info->decrement_lifetime_flag &&
1931 valid != pr_info->adv_valid_lifetime_in_secs)
1933 ip6_neighbor_syslog(vm, LOG_WARNING,
1934 "our ADV validlifetime on %U for %U does not agree with %U",
1935 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
1936 format_ip6_address, &h->dst_address);
1938 if(!pr_info->decrement_lifetime_flag &&
1939 preferred != pr_info->adv_pref_lifetime_in_secs)
1941 ip6_neighbor_syslog(vm, LOG_WARNING,
1942 "our ADV preferredlifetime on %U for %U does not agree with %U",
1943 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
1944 format_ip6_address, &h->dst_address);
1961 p0->error = error_node->errors[error0];
1963 if (error0 != ICMP6_ERROR_NONE)
1964 vlib_error_count (vm, error_node->node_index, error0, 1);
1966 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1967 to_next, n_left_to_next,
1971 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1974 /* Account for router advertisements sent. */
1975 vlib_error_count (vm, error_node->node_index,
1976 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_RX,
1977 n_advertisements_rcvd);
1979 return frame->n_vectors;
1983 * @brief Add a multicast Address to the advertised MLD set
1986 ip6_neighbor_add_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
1988 ip6_mldp_group_t *mcast_group_info;
1991 /* lookup mldp info for this interface */
1992 p = mhash_get (&radv_info->address_to_mldp_index, &addr);
1994 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
1997 if (!mcast_group_info)
2001 pool_get (radv_info->mldp_group_pool, mcast_group_info);
2003 mi = mcast_group_info - radv_info->mldp_group_pool;
2004 mhash_set (&radv_info->address_to_mldp_index, &addr, mi, /* old_value */
2007 mcast_group_info->type = 4;
2008 mcast_group_info->mcast_source_address_pool = 0;
2009 mcast_group_info->num_sources = 0;
2010 clib_memcpy (&mcast_group_info->mcast_address, &addr,
2011 sizeof (ip6_address_t));
2016 * @brief Delete a multicast Address from the advertised MLD set
2019 ip6_neighbor_del_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
2021 ip6_mldp_group_t *mcast_group_info;
2024 p = mhash_get (&radv_info->address_to_mldp_index, &addr);
2026 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
2028 if (mcast_group_info)
2030 mhash_unset (&radv_info->address_to_mldp_index, &addr,
2032 pool_put (radv_info->mldp_group_pool, mcast_group_info);
2037 * @brief Add a multicast Address to the advertised MLD set
2040 ip6_neighbor_add_mld_grp (ip6_radv_t * a,
2041 ip6_multicast_address_scope_t scope,
2042 ip6_multicast_link_local_group_id_t group)
2046 ip6_set_reserved_multicast_address (&addr, scope, group);
2048 ip6_neighbor_add_mld_prefix (a, &addr);
2052 * @brief create and initialize router advertisement parameters with default
2053 * values for this intfc
2056 ip6_neighbor_sw_interface_add_del (vnet_main_t * vnm,
2057 u32 sw_if_index, u32 is_add)
2059 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2062 vnet_sw_interface_t *sw_if0;
2063 ethernet_interface_t *eth_if0 = 0;
2065 /* lookup radv container - ethernet interfaces only */
2066 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2067 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2068 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2073 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2075 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2079 a = pool_elt_at_index (nm->if_radv_pool, ri);
2083 ip6_radv_prefix_t *p;
2084 ip6_mldp_group_t *m;
2086 /* release the lock on the interface's mcast adj */
2087 adj_unlock (a->mcast_adj_index);
2089 /* clean up prefix and MDP pools */
2091 pool_flush(p, a->adv_prefixes_pool,
2093 mhash_unset (&a->address_to_prefix_index, &p->prefix, 0);
2095 pool_flush (m, a->mldp_group_pool,
2097 mhash_unset (&a->address_to_mldp_index, &m->mcast_address, 0);
2101 pool_free (a->mldp_group_pool);
2102 pool_free (a->adv_prefixes_pool);
2104 mhash_free (&a->address_to_prefix_index);
2105 mhash_free (&a->address_to_mldp_index);
2107 pool_put (nm->if_radv_pool, a);
2108 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ~0;
2116 vnet_hw_interface_t *hw_if0;
2118 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index);
2120 pool_get (nm->if_radv_pool, a);
2122 ri = a - nm->if_radv_pool;
2123 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ri;
2125 /* initialize default values (most of which are zero) */
2126 memset (a, 0, sizeof (a[0]));
2128 a->sw_if_index = sw_if_index;
2129 a->max_radv_interval = DEF_MAX_RADV_INTERVAL;
2130 a->min_radv_interval = DEF_MIN_RADV_INTERVAL;
2131 a->curr_hop_limit = DEF_CURR_HOP_LIMIT;
2132 a->adv_router_lifetime_in_sec = DEF_DEF_RTR_LIFETIME;
2134 /* send ll address source address option */
2135 a->adv_link_layer_address = 1;
2137 a->min_delay_between_radv = MIN_DELAY_BETWEEN_RAS;
2138 a->max_delay_between_radv = MAX_DELAY_BETWEEN_RAS;
2139 a->max_rtr_default_lifetime = MAX_DEF_RTR_LIFETIME;
2140 a->seed = (u32) clib_cpu_time_now ();
2141 (void) random_u32 (&a->seed);
2142 a->randomizer = clib_cpu_time_now ();
2143 (void) random_u64 (&a->randomizer);
2145 a->initial_adverts_count = MAX_INITIAL_RTR_ADVERTISEMENTS;
2146 a->initial_adverts_sent = a->initial_adverts_count - 1;
2147 a->initial_adverts_interval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
2149 /* deafult is to send */
2152 /* fill in radv_info for this interface that will be needed later */
2153 a->adv_link_mtu = hw_if0->max_l3_packet_bytes[VLIB_RX];
2155 clib_memcpy (a->link_layer_address, eth_if0->address, 6);
2157 /* fill in default link-local address (this may be overridden) */
2158 ip6_link_local_address_from_ethernet_address
2159 (&a->link_local_address, eth_if0->address);
2161 mhash_init (&a->address_to_prefix_index, sizeof (uword),
2162 sizeof (ip6_address_t));
2163 mhash_init (&a->address_to_mldp_index, sizeof (uword),
2164 sizeof (ip6_address_t));
2166 a->mcast_adj_index = adj_mcast_add_or_lock (FIB_PROTOCOL_IP6,
2170 /* add multicast groups we will always be reporting */
2171 ip6_neighbor_add_mld_grp (a,
2172 IP6_MULTICAST_SCOPE_link_local,
2173 IP6_MULTICAST_GROUP_ID_all_hosts);
2174 ip6_neighbor_add_mld_grp (a,
2175 IP6_MULTICAST_SCOPE_link_local,
2176 IP6_MULTICAST_GROUP_ID_all_routers);
2177 ip6_neighbor_add_mld_grp (a,
2178 IP6_MULTICAST_SCOPE_link_local,
2179 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2185 /* send an mldpv2 report */
2187 ip6_neighbor_send_mldpv2_report (u32 sw_if_index)
2189 vnet_main_t *vnm = vnet_get_main ();
2190 vlib_main_t *vm = vnm->vlib_main;
2191 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2192 vnet_sw_interface_t *sw_if0;
2193 ethernet_interface_t *eth_if0;
2197 ip6_radv_t *radv_info;
2207 icmp6_multicast_listener_report_header_t *rh0;
2208 icmp6_multicast_listener_report_packet_t *rp0;
2210 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2211 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
2212 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2214 if (!eth_if0 || !vnet_sw_interface_is_admin_up (vnm, sw_if_index))
2217 /* look up the radv_t information for this interface */
2218 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2221 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2226 /* send report now - build a mldpv2 report packet */
2227 n_allocated = vlib_buffer_alloc_from_free_list (vm,
2230 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2231 if (PREDICT_FALSE (n_allocated == 0))
2233 clib_warning ("buffer allocation failure");
2237 b0 = vlib_get_buffer (vm, bo0);
2239 /* adjust the sizeof the buffer to just include the ipv6 header */
2240 b0->current_length = sizeof (icmp6_multicast_listener_report_packet_t);
2242 payload_length = sizeof (icmp6_multicast_listener_report_header_t);
2244 b0->error = ICMP6_ERROR_NONE;
2246 rp0 = vlib_buffer_get_current (b0);
2247 ip0 = (ip6_header_t *) & rp0->ip;
2248 rh0 = (icmp6_multicast_listener_report_header_t *) & rp0->report_hdr;
2250 memset (rp0, 0x0, sizeof (icmp6_multicast_listener_report_packet_t));
2252 ip0->ip_version_traffic_class_and_flow_label =
2253 clib_host_to_net_u32 (0x6 << 28);
2255 ip0->protocol = IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS;
2256 /* for DEBUG - vnet driver won't seem to emit router alerts */
2257 /* ip0->protocol = IP_PROTOCOL_ICMP6; */
2260 rh0->icmp.type = ICMP6_multicast_listener_report_v2;
2262 /* source address MUST be the link-local address */
2263 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2264 ip0->src_address = radv_info->link_local_address;
2266 /* destination is all mldpv2 routers */
2267 ip6_set_reserved_multicast_address (&ip0->dst_address,
2268 IP6_MULTICAST_SCOPE_link_local,
2269 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2271 /* add reports here */
2272 ip6_mldp_group_t *m;
2273 int num_addr_records = 0;
2274 icmp6_multicast_address_record_t rr;
2276 /* fill in the hop-by-hop extension header (router alert) info */
2277 rh0->ext_hdr.next_hdr = IP_PROTOCOL_ICMP6;
2278 rh0->ext_hdr.n_data_u64s = 0;
2280 rh0->alert.type = IP6_MLDP_ALERT_TYPE;
2282 rh0->alert.value = 0;
2287 rh0->icmp.checksum = 0;
2290 pool_foreach (m, radv_info->mldp_group_pool,
2293 rr.aux_data_len_u32s = 0;
2294 rr.num_sources = clib_host_to_net_u16 (m->num_sources);
2295 clib_memcpy(&rr.mcast_addr, &m->mcast_address, sizeof(ip6_address_t));
2299 vlib_buffer_add_data
2300 (vm, b0->free_list_index, bo0,
2301 (void *)&rr, sizeof(icmp6_multicast_address_record_t));
2303 payload_length += sizeof( icmp6_multicast_address_record_t);
2308 rh0->num_addr_records = clib_host_to_net_u16 (num_addr_records);
2310 /* update lengths */
2311 ip0->payload_length = clib_host_to_net_u16 (payload_length);
2313 rh0->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0,
2315 ASSERT (bogus_length == 0);
2318 * OK to override w/ no regard for actual FIB, because
2319 * ip6-rewrite only looks at the adjacency.
2321 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
2322 vnet_main.local_interface_sw_if_index;
2324 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
2325 b0->flags |= VNET_BUFFER_LOCALLY_ORIGINATED;
2327 vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite-mcast");
2329 f = vlib_get_frame_to_node (vm, node->index);
2330 to_next = vlib_frame_vector_args (f);
2334 vlib_put_frame_to_node (vm, node->index, f);
2339 VLIB_REGISTER_NODE (ip6_icmp_router_solicitation_node,static) =
2341 .function = icmp6_router_solicitation,
2342 .name = "icmp6-router-solicitation",
2344 .vector_size = sizeof (u32),
2346 .format_trace = format_icmp6_input_trace,
2348 .n_next_nodes = ICMP6_ROUTER_SOLICITATION_N_NEXT,
2350 [ICMP6_ROUTER_SOLICITATION_NEXT_DROP] = "error-drop",
2351 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW] = "ip6-rewrite-mcast",
2352 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX] = "interface-output",
2357 /* send a RA or update the timer info etc.. */
2359 ip6_neighbor_process_timer_event (vlib_main_t * vm,
2360 vlib_node_runtime_t * node,
2361 vlib_frame_t * frame)
2363 vnet_main_t *vnm = vnet_get_main ();
2364 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2365 ip6_radv_t *radv_info;
2366 vlib_frame_t *f = 0;
2367 u32 n_this_frame = 0;
2368 u32 n_left_to_next = 0;
2371 icmp6_router_solicitation_header_t *h0;
2373 f64 now = vlib_time_now (vm);
2375 /* Interface ip6 radv info list */
2377 pool_foreach (radv_info, nm->if_radv_pool,
2379 if( !vnet_sw_interface_is_admin_up (vnm, radv_info->sw_if_index))
2381 radv_info->initial_adverts_sent = radv_info->initial_adverts_count-1;
2382 radv_info->next_multicast_time = now;
2383 radv_info->last_multicast_time = now;
2384 radv_info->last_radv_time = 0;
2385 radv_info->all_routers_mcast = 0;
2389 /* Make sure that we've joined the all-routers multicast group */
2390 if(!radv_info->all_routers_mcast)
2392 /* send MDLP_REPORT_EVENT message */
2393 ip6_neighbor_send_mldpv2_report(radv_info->sw_if_index);
2394 radv_info->all_routers_mcast = 1;
2397 /* is it time to send a multicast RA on this interface? */
2398 if(radv_info->send_radv && (now >= radv_info->next_multicast_time))
2403 f64 rfn = (radv_info->max_radv_interval - radv_info->min_radv_interval) *
2404 random_f64 (&radv_info->seed) + radv_info->min_radv_interval;
2406 /* multicast send - compute next multicast send time */
2407 if( radv_info->initial_adverts_sent > 0)
2409 radv_info->initial_adverts_sent--;
2410 if(rfn > radv_info-> initial_adverts_interval)
2411 rfn = radv_info-> initial_adverts_interval;
2413 /* check to see if we are ceasing to send */
2414 if( radv_info->initial_adverts_sent == 0)
2415 if(radv_info->cease_radv)
2416 radv_info->send_radv = 0;
2419 radv_info->next_multicast_time = rfn + now;
2420 radv_info->last_multicast_time = now;
2422 /* send advert now - build a "solicted" router advert with unspecified source address */
2423 n_allocated = vlib_buffer_alloc_from_free_list
2424 (vm, &bo0, n_to_alloc, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2426 if (PREDICT_FALSE(n_allocated == 0))
2428 clib_warning ("buffer allocation failure");
2431 b0 = vlib_get_buffer (vm, bo0);
2432 b0->current_length = sizeof( icmp6_router_solicitation_header_t);
2433 b0->error = ICMP6_ERROR_NONE;
2434 vnet_buffer (b0)->sw_if_index[VLIB_RX] = radv_info->sw_if_index;
2436 h0 = vlib_buffer_get_current (b0);
2438 memset (h0, 0, sizeof (icmp6_router_solicitation_header_t));
2440 h0->ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2441 h0->ip.payload_length = clib_host_to_net_u16 (sizeof (icmp6_router_solicitation_header_t)
2442 - STRUCT_OFFSET_OF (icmp6_router_solicitation_header_t, neighbor));
2443 h0->ip.protocol = IP_PROTOCOL_ICMP6;
2444 h0->ip.hop_limit = 255;
2446 /* set src/dst address as "unspecified" this marks this packet as internally generated rather than recieved */
2447 h0->ip.src_address.as_u64[0] = 0;
2448 h0->ip.src_address.as_u64[1] = 0;
2450 h0->ip.dst_address.as_u64[0] = 0;
2451 h0->ip.dst_address.as_u64[1] = 0;
2453 h0->neighbor.icmp.type = ICMP6_router_solicitation;
2455 if (PREDICT_FALSE(f == 0))
2457 f = vlib_get_frame_to_node (vm, ip6_icmp_router_solicitation_node.index);
2458 to_next = vlib_frame_vector_args (f);
2459 n_left_to_next = VLIB_FRAME_SIZE;
2468 if (PREDICT_FALSE(n_left_to_next == 0))
2470 f->n_vectors = n_this_frame;
2471 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2480 ASSERT (n_this_frame);
2481 f->n_vectors = n_this_frame;
2482 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2488 ip6_icmp_neighbor_discovery_event_process (vlib_main_t * vm,
2489 vlib_node_runtime_t * node,
2490 vlib_frame_t * frame)
2493 ip6_icmp_neighbor_discovery_event_data_t *event_data;
2495 /* init code here */
2499 vlib_process_wait_for_event_or_clock (vm, 1. /* seconds */ );
2501 event_data = vlib_process_get_event_data (vm, &event_type);
2505 /* No events found: timer expired. */
2506 /* process interface list and send RAs as appropriate, update timer info */
2507 ip6_neighbor_process_timer_event (vm, node, frame);
2514 case ICMP6_ND_EVENT_INIT:
2525 _vec_len (event_data) = 0;
2528 return frame->n_vectors;
2532 VLIB_REGISTER_NODE (ip6_icmp_router_advertisement_node,static) =
2534 .function = icmp6_router_advertisement,
2535 .name = "icmp6-router-advertisement",
2537 .vector_size = sizeof (u32),
2539 .format_trace = format_icmp6_input_trace,
2548 vlib_node_registration_t ip6_icmp_neighbor_discovery_event_node = {
2550 .function = ip6_icmp_neighbor_discovery_event_process,
2551 .name = "ip6-icmp-neighbor-discovery-event-process",
2552 .type = VLIB_NODE_TYPE_PROCESS,
2556 icmp6_neighbor_solicitation (vlib_main_t * vm,
2557 vlib_node_runtime_t * node, vlib_frame_t * frame)
2559 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
2560 /* is_solicitation */
2565 icmp6_neighbor_advertisement (vlib_main_t * vm,
2566 vlib_node_runtime_t * node,
2567 vlib_frame_t * frame)
2569 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
2570 /* is_solicitation */
2575 VLIB_REGISTER_NODE (ip6_icmp_neighbor_solicitation_node,static) =
2577 .function = icmp6_neighbor_solicitation,
2578 .name = "icmp6-neighbor-solicitation",
2580 .vector_size = sizeof (u32),
2582 .format_trace = format_icmp6_input_trace,
2584 .n_next_nodes = ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
2586 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP] = "error-drop",
2587 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY] = "interface-output",
2593 VLIB_REGISTER_NODE (ip6_icmp_neighbor_advertisement_node,static) =
2595 .function = icmp6_neighbor_advertisement,
2596 .name = "icmp6-neighbor-advertisement",
2598 .vector_size = sizeof (u32),
2600 .format_trace = format_icmp6_input_trace,
2609 /* API support functions */
2611 ip6_neighbor_ra_config (vlib_main_t * vm, u32 sw_if_index,
2612 u8 suppress, u8 managed, u8 other,
2613 u8 ll_option, u8 send_unicast, u8 cease,
2614 u8 use_lifetime, u32 lifetime,
2615 u32 initial_count, u32 initial_interval,
2616 u32 max_interval, u32 min_interval, u8 is_no)
2618 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2622 /* look up the radv_t information for this interface */
2623 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2625 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2626 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
2631 ip6_radv_t *radv_info;
2632 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2634 if ((max_interval != 0) && (min_interval == 0))
2635 min_interval = .75 * max_interval;
2639 0) ? ((is_no) ? DEF_MAX_RADV_INTERVAL : max_interval) :
2640 radv_info->max_radv_interval;
2643 0) ? ((is_no) ? DEF_MIN_RADV_INTERVAL : min_interval) :
2644 radv_info->min_radv_interval;
2647 0) ? ((is_no) ? DEF_DEF_RTR_LIFETIME : lifetime) :
2648 radv_info->adv_router_lifetime_in_sec;
2652 if (lifetime > MAX_DEF_RTR_LIFETIME)
2653 lifetime = MAX_DEF_RTR_LIFETIME;
2655 if (lifetime <= max_interval)
2656 return VNET_API_ERROR_INVALID_VALUE;
2659 if (min_interval != 0)
2661 if ((min_interval > .75 * max_interval) || (min_interval < 3))
2662 return VNET_API_ERROR_INVALID_VALUE;
2665 if ((initial_count > MAX_INITIAL_RTR_ADVERTISEMENTS) ||
2666 (initial_interval > MAX_INITIAL_RTR_ADVERT_INTERVAL))
2667 return VNET_API_ERROR_INVALID_VALUE;
2670 if "flag" is set and is_no is true then restore default value else set value corresponding to "flag"
2671 if "flag" is clear don't change corresponding value
2673 radv_info->send_radv =
2674 (suppress != 0) ? ((is_no != 0) ? 1 : 0) : radv_info->send_radv;
2675 radv_info->adv_managed_flag =
2676 (managed != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_managed_flag;
2677 radv_info->adv_other_flag =
2678 (other != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_other_flag;
2679 radv_info->adv_link_layer_address =
2681 0) ? ((is_no) ? 1 : 0) : radv_info->adv_link_layer_address;
2682 radv_info->send_unicast =
2683 (send_unicast != 0) ? ((is_no) ? 0 : 1) : radv_info->send_unicast;
2684 radv_info->cease_radv =
2685 (cease != 0) ? ((is_no) ? 0 : 1) : radv_info->cease_radv;
2687 radv_info->min_radv_interval = min_interval;
2688 radv_info->max_radv_interval = max_interval;
2689 radv_info->adv_router_lifetime_in_sec = lifetime;
2691 radv_info->initial_adverts_count =
2693 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERTISEMENTS : initial_count) :
2694 radv_info->initial_adverts_count;
2695 radv_info->initial_adverts_interval =
2696 (initial_interval !=
2697 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERT_INTERVAL : initial_interval) :
2698 radv_info->initial_adverts_interval;
2701 if ((cease != 0) && (is_no))
2702 radv_info->send_radv = 1;
2704 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
2705 radv_info->next_multicast_time = vlib_time_now (vm);
2706 radv_info->last_multicast_time = vlib_time_now (vm);
2707 radv_info->last_radv_time = 0;
2713 ip6_neighbor_ra_prefix (vlib_main_t * vm, u32 sw_if_index,
2714 ip6_address_t * prefix_addr, u8 prefix_len,
2715 u8 use_default, u32 val_lifetime, u32 pref_lifetime,
2716 u8 no_advertise, u8 off_link, u8 no_autoconfig,
2717 u8 no_onlink, u8 is_no)
2719 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2724 /* look up the radv_t information for this interface */
2725 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2728 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2730 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
2734 f64 now = vlib_time_now (vm);
2735 ip6_radv_t *radv_info;
2736 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2738 /* prefix info add, delete or update */
2739 ip6_radv_prefix_t *prefix;
2741 /* lookup prefix info for this address on this interface */
2742 uword *p = mhash_get (&radv_info->address_to_prefix_index, prefix_addr);
2744 prefix = p ? pool_elt_at_index (radv_info->adv_prefixes_pool, p[0]) : 0;
2750 return VNET_API_ERROR_INVALID_VALUE; /* invalid prefix */
2752 if (prefix->prefix_len != prefix_len)
2753 return VNET_API_ERROR_INVALID_VALUE_2;
2755 /* FIXME - Should the DP do this or the CP ? */
2756 /* do specific delete processing here before returning */
2757 /* try to remove from routing table */
2759 mhash_unset (&radv_info->address_to_prefix_index, prefix_addr,
2761 pool_put (radv_info->adv_prefixes_pool, prefix);
2763 radv_info->initial_adverts_sent =
2764 radv_info->initial_adverts_count - 1;
2765 radv_info->next_multicast_time = vlib_time_now (vm);
2766 radv_info->last_multicast_time = vlib_time_now (vm);
2767 radv_info->last_radv_time = 0;
2771 /* adding or changing */
2776 pool_get (radv_info->adv_prefixes_pool, prefix);
2777 pi = prefix - radv_info->adv_prefixes_pool;
2778 mhash_set (&radv_info->address_to_prefix_index, prefix_addr, pi,
2781 memset (prefix, 0x0, sizeof (ip6_radv_prefix_t));
2783 prefix->prefix_len = prefix_len;
2784 clib_memcpy (&prefix->prefix, prefix_addr, sizeof (ip6_address_t));
2786 /* initialize default values */
2787 prefix->adv_on_link_flag = 1; /* L bit set */
2788 prefix->adv_autonomous_flag = 1; /* A bit set */
2789 prefix->adv_valid_lifetime_in_secs = DEF_ADV_VALID_LIFETIME;
2790 prefix->adv_pref_lifetime_in_secs = DEF_ADV_PREF_LIFETIME;
2791 prefix->enabled = 1;
2792 prefix->decrement_lifetime_flag = 1;
2793 prefix->deprecated_prefix_flag = 1;
2797 /* FIXME - Should the DP do this or the CP ? */
2798 /* insert prefix into routing table as a connected prefix */
2807 if (prefix->prefix_len != prefix_len)
2808 return VNET_API_ERROR_INVALID_VALUE_2;
2812 /* FIXME - Should the DP do this or the CP ? */
2813 /* remove from routing table if already there */
2817 if ((val_lifetime == ~0) || (pref_lifetime == ~0))
2819 prefix->adv_valid_lifetime_in_secs = ~0;
2820 prefix->adv_pref_lifetime_in_secs = ~0;
2821 prefix->decrement_lifetime_flag = 0;
2825 prefix->adv_valid_lifetime_in_secs = val_lifetime;;
2826 prefix->adv_pref_lifetime_in_secs = pref_lifetime;
2829 /* copy remaining */
2830 prefix->enabled = !(no_advertise != 0);
2831 prefix->adv_on_link_flag = !((off_link != 0) || (no_onlink != 0));
2832 prefix->adv_autonomous_flag = !(no_autoconfig != 0);
2836 /* fill in the expiration times */
2837 prefix->valid_lifetime_expires =
2838 now + prefix->adv_valid_lifetime_in_secs;
2839 prefix->pref_lifetime_expires = now + prefix->adv_pref_lifetime_in_secs;
2841 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
2842 radv_info->next_multicast_time = vlib_time_now (vm);
2843 radv_info->last_multicast_time = vlib_time_now (vm);
2844 radv_info->last_radv_time = 0;
2850 ip6_neighbor_cmd (vlib_main_t * vm, unformat_input_t * main_input,
2851 vlib_cli_command_t * cmd)
2853 vnet_main_t *vnm = vnet_get_main ();
2854 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2855 clib_error_t *error = 0;
2857 u8 suppress = 0, managed = 0, other = 0;
2858 u8 suppress_ll_option = 0, send_unicast = 0, cease = 0;
2859 u8 use_lifetime = 0;
2860 u32 sw_if_index, ra_lifetime = 0, ra_initial_count =
2861 0, ra_initial_interval = 0;
2862 u32 ra_max_interval = 0, ra_min_interval = 0;
2864 unformat_input_t _line_input, *line_input = &_line_input;
2865 vnet_sw_interface_t *sw_if0;
2867 int add_radv_info = 1;
2868 __attribute__ ((unused)) ip6_radv_t *radv_info = 0;
2869 ip6_address_t ip6_addr;
2873 /* Get a line of input. */
2874 if (!unformat_user (main_input, unformat_line_input, line_input))
2877 /* get basic radv info for this interface */
2878 if (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2881 if (unformat_user (line_input,
2882 unformat_vnet_sw_interface, vnm, &sw_if_index))
2885 ethernet_interface_t *eth_if0 = 0;
2887 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2888 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2890 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2895 clib_error_return (0, "Interface must be of ethernet type");
2899 /* look up the radv_t information for this interface */
2900 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
2903 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2907 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2911 error = clib_error_return (0, "unknown interface %U'",
2912 format_unformat_error, line_input);
2918 error = clib_error_return (0, "invalid interface name %U'",
2919 format_unformat_error, line_input);
2924 /* get the rest of the command */
2925 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2927 if (unformat (line_input, "no"))
2929 else if (unformat (line_input, "prefix %U/%d",
2930 unformat_ip6_address, &ip6_addr, &addr_len))
2935 else if (unformat (line_input, "ra-managed-config-flag"))
2940 else if (unformat (line_input, "ra-other-config-flag"))
2945 else if (unformat (line_input, "ra-suppress") ||
2946 unformat (line_input, "ra-surpress"))
2951 else if (unformat (line_input, "ra-suppress-link-layer") ||
2952 unformat (line_input, "ra-surpress-link-layer"))
2954 suppress_ll_option = 1;
2957 else if (unformat (line_input, "ra-send-unicast"))
2962 else if (unformat (line_input, "ra-lifetime"))
2964 if (!unformat (line_input, "%d", &ra_lifetime))
2966 error = unformat_parse_error (line_input);
2972 else if (unformat (line_input, "ra-initial"))
2975 (line_input, "%d %d", &ra_initial_count, &ra_initial_interval))
2977 error = unformat_parse_error (line_input);
2982 else if (unformat (line_input, "ra-interval"))
2984 if (!unformat (line_input, "%d", &ra_max_interval))
2986 error = unformat_parse_error (line_input);
2990 if (!unformat (line_input, "%d", &ra_min_interval))
2991 ra_min_interval = 0;
2994 else if (unformat (line_input, "ra-cease"))
3001 error = unformat_parse_error (line_input);
3008 ip6_neighbor_ra_config (vm, sw_if_index,
3009 suppress, managed, other,
3010 suppress_ll_option, send_unicast, cease,
3011 use_lifetime, ra_lifetime,
3012 ra_initial_count, ra_initial_interval,
3013 ra_max_interval, ra_min_interval, is_no);
3017 u32 valid_lifetime_in_secs = 0;
3018 u32 pref_lifetime_in_secs = 0;
3019 u8 use_prefix_default_values = 0;
3020 u8 no_advertise = 0;
3022 u8 no_autoconfig = 0;
3025 /* get the rest of the command */
3026 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3028 if (unformat (line_input, "default"))
3030 use_prefix_default_values = 1;
3033 else if (unformat (line_input, "infinite"))
3035 valid_lifetime_in_secs = ~0;
3036 pref_lifetime_in_secs = ~0;
3039 else if (unformat (line_input, "%d %d", &valid_lifetime_in_secs,
3040 &pref_lifetime_in_secs))
3047 /* get the rest of the command */
3048 while (!use_prefix_default_values &&
3049 unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3051 if (unformat (line_input, "no-advertise"))
3053 else if (unformat (line_input, "off-link"))
3055 else if (unformat (line_input, "no-autoconfig"))
3057 else if (unformat (line_input, "no-onlink"))
3061 error = unformat_parse_error (line_input);
3066 ip6_neighbor_ra_prefix (vm, sw_if_index,
3067 &ip6_addr, addr_len,
3068 use_prefix_default_values,
3069 valid_lifetime_in_secs,
3070 pref_lifetime_in_secs,
3072 off_link, no_autoconfig, no_onlink, is_no);
3076 unformat_free (line_input);
3082 ip6_print_addrs (vlib_main_t * vm, u32 * addrs)
3084 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3087 for (i = 0; i < vec_len (addrs); i++)
3089 ip_interface_address_t *a =
3090 pool_elt_at_index (lm->if_address_pool, addrs[i]);
3091 ip6_address_t *address = ip_interface_address_get_address (lm, a);
3093 vlib_cli_output (vm, "\t\t%U/%d",
3094 format_ip6_address, address, a->address_length);
3098 static clib_error_t *
3099 show_ip6_interface_cmd (vlib_main_t * vm,
3100 unformat_input_t * input, vlib_cli_command_t * cmd)
3102 vnet_main_t *vnm = vnet_get_main ();
3103 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3104 clib_error_t *error = 0;
3109 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3113 /* look up the radv_t information for this interface */
3114 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3117 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3121 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3122 ip6_radv_t *radv_info;
3123 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3125 vlib_cli_output (vm, "%U is admin %s\n",
3126 format_vnet_sw_interface_name, vnm,
3127 vnet_get_sw_interface (vnm, sw_if_index),
3128 (vnet_sw_interface_is_admin_up (vnm, sw_if_index) ?
3132 u32 *link_scope = 0, *global_scope = 0;
3133 u32 *local_scope = 0, *unknown_scope = 0;
3134 ip_interface_address_t *a;
3136 vec_validate_init_empty (lm->if_address_pool_index_by_sw_if_index,
3138 ai = lm->if_address_pool_index_by_sw_if_index[sw_if_index];
3140 while (ai != (u32) ~ 0)
3142 a = pool_elt_at_index (lm->if_address_pool, ai);
3143 ip6_address_t *address =
3144 ip_interface_address_get_address (lm, a);
3146 if (ip6_address_is_link_local_unicast (address))
3147 vec_add1 (link_scope, ai);
3148 else if (ip6_address_is_global_unicast (address))
3149 vec_add1 (global_scope, ai);
3150 else if (ip6_address_is_local_unicast (address))
3151 vec_add1 (local_scope, ai);
3153 vec_add1 (unknown_scope, ai);
3155 ai = a->next_this_sw_interface;
3158 if (vec_len (link_scope))
3160 vlib_cli_output (vm, "\tLink-local address(es):\n");
3161 ip6_print_addrs (vm, link_scope);
3162 vec_free (link_scope);
3165 if (vec_len (local_scope))
3167 vlib_cli_output (vm, "\tLocal unicast address(es):\n");
3168 ip6_print_addrs (vm, local_scope);
3169 vec_free (local_scope);
3172 if (vec_len (global_scope))
3174 vlib_cli_output (vm, "\tGlobal unicast address(es):\n");
3175 ip6_print_addrs (vm, global_scope);
3176 vec_free (global_scope);
3179 if (vec_len (unknown_scope))
3181 vlib_cli_output (vm, "\tOther-scope address(es):\n");
3182 ip6_print_addrs (vm, unknown_scope);
3183 vec_free (unknown_scope);
3186 vlib_cli_output (vm, "\tJoined group address(es):\n");
3187 ip6_mldp_group_t *m;
3189 pool_foreach (m, radv_info->mldp_group_pool,
3191 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
3196 vlib_cli_output (vm, "\tAdvertised Prefixes:\n");
3197 ip6_radv_prefix_t *p;
3199 pool_foreach (p, radv_info->adv_prefixes_pool,
3201 vlib_cli_output (vm, "\t\tprefix %U, length %d\n",
3202 format_ip6_address, &p->prefix, p->prefix_len);
3206 vlib_cli_output (vm, "\tMTU is %d\n", radv_info->adv_link_mtu);
3207 vlib_cli_output (vm, "\tICMP error messages are unlimited\n");
3208 vlib_cli_output (vm, "\tICMP redirects are disabled\n");
3209 vlib_cli_output (vm, "\tICMP unreachables are not sent\n");
3210 vlib_cli_output (vm, "\tND DAD is disabled\n");
3211 //vlib_cli_output (vm, "\tND reachable time is %d milliseconds\n",);
3212 vlib_cli_output (vm, "\tND advertised reachable time is %d\n",
3213 radv_info->adv_neighbor_reachable_time_in_msec);
3214 vlib_cli_output (vm,
3215 "\tND advertised retransmit interval is %d (msec)\n",
3217 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
3219 u32 ra_interval = radv_info->max_radv_interval;
3220 u32 ra_interval_min = radv_info->min_radv_interval;
3221 vlib_cli_output (vm,
3222 "\tND router advertisements are sent every %d seconds (min interval is %d)\n",
3223 ra_interval, ra_interval_min);
3224 vlib_cli_output (vm,
3225 "\tND router advertisements live for %d seconds\n",
3226 radv_info->adv_router_lifetime_in_sec);
3227 vlib_cli_output (vm,
3228 "\tHosts %s stateless autoconfig for addresses\n",
3229 (radv_info->adv_managed_flag) ? "use" :
3231 vlib_cli_output (vm, "\tND router advertisements sent %d\n",
3232 radv_info->n_advertisements_sent);
3233 vlib_cli_output (vm, "\tND router solicitations received %d\n",
3234 radv_info->n_solicitations_rcvd);
3235 vlib_cli_output (vm, "\tND router solicitations dropped %d\n",
3236 radv_info->n_solicitations_dropped);
3240 error = clib_error_return (0, "IPv6 not enabled on interface",
3241 format_unformat_error, input);
3249 * This command is used to display various IPv6 attributes on a given
3253 * Example of how to display IPv6 settings:
3254 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
3255 * GigabitEthernet2/0/0 is admin up
3256 * Link-local address(es):
3258 * Joined group address(es):
3263 * Advertised Prefixes:
3264 * prefix fe80::fe:28ff:fe9c:75b3, length 64
3266 * ICMP error messages are unlimited
3267 * ICMP redirects are disabled
3268 * ICMP unreachables are not sent
3269 * ND DAD is disabled
3270 * ND advertised reachable time is 0
3271 * ND advertised retransmit interval is 0 (msec)
3272 * ND router advertisements are sent every 200 seconds (min interval is 150)
3273 * ND router advertisements live for 600 seconds
3274 * Hosts use stateless autoconfig for addresses
3275 * ND router advertisements sent 19336
3276 * ND router solicitations received 0
3277 * ND router solicitations dropped 0
3279 * Example of output if IPv6 is not enabled on the interface:
3280 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
3281 * show ip6 interface: IPv6 not enabled on interface
3285 VLIB_CLI_COMMAND (show_ip6_interface_command, static) =
3287 .path = "show ip6 interface",
3288 .function = show_ip6_interface_cmd,
3289 .short_help = "show ip6 interface <interface>",
3294 disable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
3296 clib_error_t *error = 0;
3297 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3300 /* look up the radv_t information for this interface */
3301 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3303 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3305 /* if not created - do nothing */
3308 vnet_main_t *vnm = vnet_get_main ();
3309 ip6_radv_t *radv_info;
3311 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3313 /* check radv_info ref count for other ip6 addresses on this interface */
3314 /* This implicitly excludes the link local address */
3315 if (radv_info->ref_count == 0)
3317 /* essentially "disables" ipv6 on this interface */
3318 error = ip6_add_del_interface_address (vm, sw_if_index,
3320 link_local_address, 128,
3323 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index,
3325 ip6_mfib_interface_enable_disable (sw_if_index, 0);
3332 ip6_interface_enabled (vlib_main_t * vm, u32 sw_if_index)
3334 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3337 /* look up the radv_t information for this interface */
3338 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3341 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3347 enable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
3349 clib_error_t *error = 0;
3350 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3354 /* look up the radv_t information for this interface */
3355 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3358 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3360 /* if not created yet */
3363 vnet_main_t *vnm = vnet_get_main ();
3364 vnet_sw_interface_t *sw_if0;
3366 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
3367 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
3369 ethernet_interface_t *eth_if0;
3372 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
3375 /* create radv_info. for this interface. This holds all the info needed for router adverts */
3377 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, is_add);
3381 ip6_radv_t *radv_info;
3382 ip6_address_t link_local_address;
3384 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3386 ip6_link_local_address_from_ethernet_mac_address
3387 (&link_local_address, eth_if0->address);
3389 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index);
3390 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_SUB)
3392 /* make up an interface id */
3396 link_local_address.as_u64[0] = radv_info->randomizer;
3399 md5_add (&m, &link_local_address, 16);
3400 md5_finish (&m, digest);
3402 clib_memcpy (&link_local_address, digest, 16);
3404 radv_info->randomizer = link_local_address.as_u64[0];
3406 link_local_address.as_u64[0] =
3407 clib_host_to_net_u64 (0xFE80000000000000ULL);
3409 link_local_address.as_u8[8] &= 0xfd;
3412 ip6_mfib_interface_enable_disable (sw_if_index, 1);
3414 /* essentially "enables" ipv6 on this interface */
3415 error = ip6_add_del_interface_address (vm, sw_if_index,
3416 &link_local_address,
3418 /* address width */ ,
3422 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index,
3426 radv_info->link_local_address = link_local_address;
3435 static clib_error_t *
3436 enable_ip6_interface_cmd (vlib_main_t * vm,
3437 unformat_input_t * input, vlib_cli_command_t * cmd)
3439 vnet_main_t *vnm = vnet_get_main ();
3440 clib_error_t *error = 0;
3445 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3447 enable_ip6_interface (vm, sw_if_index);
3451 error = clib_error_return (0, "unknown interface\n'",
3452 format_unformat_error, input);
3459 * This command is used to enable IPv6 on a given interface.
3462 * Example of how enable IPv6 on a given interface:
3463 * @cliexcmd{enable ip6 interface GigabitEthernet2/0/0}
3466 VLIB_CLI_COMMAND (enable_ip6_interface_command, static) =
3468 .path = "enable ip6 interface",
3469 .function = enable_ip6_interface_cmd,
3470 .short_help = "enable ip6 interface <interface>",
3474 static clib_error_t *
3475 disable_ip6_interface_cmd (vlib_main_t * vm,
3476 unformat_input_t * input, vlib_cli_command_t * cmd)
3478 vnet_main_t *vnm = vnet_get_main ();
3479 clib_error_t *error = 0;
3484 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3486 error = disable_ip6_interface (vm, sw_if_index);
3490 error = clib_error_return (0, "unknown interface\n'",
3491 format_unformat_error, input);
3498 * This command is used to disable IPv6 on a given interface.
3501 * Example of how disable IPv6 on a given interface:
3502 * @cliexcmd{disable ip6 interface GigabitEthernet2/0/0}
3505 VLIB_CLI_COMMAND (disable_ip6_interface_command, static) =
3507 .path = "disable ip6 interface",
3508 .function = disable_ip6_interface_cmd,
3509 .short_help = "disable ip6 interface <interface>",
3514 * This command is used to configure the neighbor discovery
3515 * parameters on a given interface. Use the '<em>show ip6 interface</em>'
3516 * command to display some of the current neighbor discovery parameters
3517 * on a given interface. This command has three formats:
3520 * <b>Format 1 - Router Advertisement Options:</b> (Only one can be entered in a single command)
3522 * '<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>'
3526 * <em>[no] ra-managed-config-flag</em> - Advertises in ICMPv6
3527 * router-advertisement messages to use stateful address
3528 * auto-configuration to obtain address information (sets the M-bit).
3529 * Default is the M-bit is not set and the '<em>no</em>' option
3530 * returns it to this default state.
3532 * <em>[no] ra-other-config-flag</em> - Indicates in ICMPv6
3533 * router-advertisement messages that hosts use stateful auto
3534 * configuration to obtain nonaddress related information (sets
3535 * the O-bit). Default is the O-bit is not set and the '<em>no</em>'
3536 * option returns it to this default state.
3538 * <em>[no] ra-suppress</em> - Disables sending ICMPv6 router-advertisement
3539 * messages. The '<em>no</em>' option implies to enable sending ICMPv6
3540 * router-advertisement messages.
3542 * <em>[no] ra-suppress-link-layer</em> - Indicates not to include the
3543 * optional source link-layer address in the ICMPv6 router-advertisement
3544 * messages. Default is to include the optional source link-layer address
3545 * and the '<em>no</em>' option returns it to this default state.
3547 * <em>[no] ra-send-unicast</em> - Use the source address of the
3548 * router-solicitation message if availiable. The default is to use
3549 * multicast address of all nodes, and the '<em>no</em>' option returns
3550 * it to this default state.
3552 * <em>[no] ra-lifetime <lifetime></em> - Advertises the lifetime of a
3553 * default router in ICMPv6 router-advertisement messages. The range is
3554 * from 0 to 9000 seconds. '<em><lifetime></em>' must be greater than
3555 * '<em><max-interval></em>'. The default value is 600 seconds and the
3556 * '<em>no</em>' option returns it to this default value.
3558 * <em>[no] ra-initial <cnt> <interval></em> - Number of initial ICMPv6
3559 * router-advertisement messages sent and the interval between each
3560 * message. Range for count is 1 - 3 and default is 3. Range for interval
3561 * is 1 to 16 seconds, and default is 16 seconds. The '<em>no</em>' option
3562 * returns both to their default value.
3564 * <em>[no] ra-interval <max-interval> [<min-interval>]</em> - Configures the
3565 * interval between sending ICMPv6 router-advertisement messages. The
3566 * range for max-interval is from 4 to 200 seconds. min-interval can not
3567 * be more than 75% of max-interval. If not set, min-interval will be
3568 * set to 75% of max-interval. The range for min-interval is from 3 to
3569 * 150 seconds. The '<em>no</em>' option returns both to their default
3572 * <em>[no] ra-cease</em> - Cease sending ICMPv6 router-advertisement messages.
3573 * The '<em>no</em>' options implies to start (or restart) sending
3574 * ICMPv6 router-advertisement messages.
3577 * <b>Format 2 - Prefix Options:</b>
3579 * '<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>'
3583 * <em>no</em> - All additional flags are ignored and the prefix is deleted.
3585 * <em><valid-lifetime> <pref-lifetime></em> - '<em><valid-lifetime></em>' is the
3586 * length of time in seconds during what the prefix is valid for the purpose of
3587 * on-link determination. Range is 7203 to 2592000 seconds and default is 2592000
3588 * seconds (30 days). '<em><pref-lifetime></em>' is the prefered-lifetime and is the
3589 * length of time in seconds during what addresses generated from the prefix remain
3590 * preferred. Range is 0 to 604800 seconds and default is 604800 seconds (7 days).
3592 * <em>infinite</em> - Both '<em><valid-lifetime></em>' and '<em><<pref-lifetime></em>'
3593 * are inifinte, no timeout.
3595 * <em>no-advertise</em> - Do not send full router address in prefix
3596 * advertisement. Default is to advertise (i.e. - This flag is off by default).
3598 * <em>off-link</em> - Prefix is off-link, clear L-bit in packet. Default is on-link
3599 * (i.e. - This flag is off and L-bit in packet is set by default and this prefix can
3600 * be used for on-link determination). '<em>no-onlink</em>' also controls the L-bit.
3602 * <em>no-autoconfig</em> - Do not use prefix for autoconfiguration, clear A-bit in packet.
3603 * Default is autoconfig (i.e. - This flag is off and A-bit in packet is set by default.
3605 * <em>no-onlink</em> - Do not use prefix for onlink determination, clear L-bit in packet.
3606 * Default is on-link (i.e. - This flag is off and L-bit in packet is set by default and
3607 * this prefix can be used for on-link determination). '<em>off-link</em>' also controls
3611 * <b>Format 3: - Default of Prefix:</b>
3613 * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> default</b></em>'
3615 * When a new prefix is added (or existing one is being overwritten) <em>default</em>
3616 * uses default values for the prefix. If <em>no</em> is used, the <em>default</em>
3617 * is ignored and the prefix is deleted.
3621 * Example of how set a router advertisement option:
3622 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 ra-interval 100 20}
3623 * Example of how to add a prefix:
3624 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 prefix fe80::fe:28ff:fe9c:75b3/64 infinite no-advertise}
3625 * Example of how to delete a prefix:
3626 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 no prefix fe80::fe:28ff:fe9c:75b3/64}
3629 VLIB_CLI_COMMAND (ip6_nd_command, static) =
3632 .short_help = "ip6 nd <interface> ...",
3633 .function = ip6_neighbor_cmd,
3638 set_ip6_link_local_address (vlib_main_t * vm,
3639 u32 sw_if_index, ip6_address_t * address)
3641 clib_error_t *error = 0;
3642 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3644 ip6_radv_t *radv_info;
3645 vnet_main_t *vnm = vnet_get_main ();
3647 if (!ip6_address_is_link_local_unicast (address))
3649 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_LINK_LOCAL;
3650 return (error = clib_error_return (0, "address not link-local",
3651 format_unformat_error));
3654 /* call enable ipv6 */
3655 enable_ip6_interface (vm, sw_if_index);
3657 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3661 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3663 /* save if link local address (overwrite default) */
3665 /* delete the old one */
3666 error = ip6_add_del_interface_address (vm, sw_if_index,
3667 &radv_info->link_local_address,
3668 128, 1 /* is_del */ );
3672 /* add the new one */
3673 error = ip6_add_del_interface_address (vm, sw_if_index,
3679 radv_info->link_local_address = *address;
3685 vnm->api_errno = VNET_API_ERROR_IP6_NOT_ENABLED;
3686 error = clib_error_return (0, "ip6 not enabled for interface",
3687 format_unformat_error);
3693 set_ip6_link_local_address_cmd (vlib_main_t * vm,
3694 unformat_input_t * input,
3695 vlib_cli_command_t * cmd)
3697 vnet_main_t *vnm = vnet_get_main ();
3698 clib_error_t *error = 0;
3700 ip6_address_t ip6_addr;
3702 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3704 /* get the rest of the command */
3705 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3707 if (unformat (input, "%U", unformat_ip6_address, &ip6_addr))
3710 return (unformat_parse_error (input));
3713 error = set_ip6_link_local_address (vm, sw_if_index, &ip6_addr);
3718 * This command is used to assign an IPv6 Link-local address to an
3719 * interface. This command will enable IPv6 on an interface if it
3720 * is not already enabled. Use the '<em>show ip6 interface</em>' command
3721 * to display the assigned Link-local address.
3724 * Example of how to assign an IPv6 Link-local address to an interface:
3725 * @cliexcmd{set ip6 link-local address GigabitEthernet2/0/0 FE80::AB8}
3728 VLIB_CLI_COMMAND (set_ip6_link_local_address_command, static) =
3730 .path = "set ip6 link-local address",
3731 .short_help = "set ip6 link-local address <interface> <ip6-address>",
3732 .function = set_ip6_link_local_address_cmd,
3737 * @brief callback when an interface address is added or deleted
3740 ip6_neighbor_add_del_interface_address (ip6_main_t * im,
3743 ip6_address_t * address,
3745 u32 if_address_index, u32 is_delete)
3747 vnet_main_t *vnm = vnet_get_main ();
3748 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3750 vlib_main_t *vm = vnm->vlib_main;
3751 ip6_radv_t *radv_info;
3754 /* create solicited node multicast address for this interface adddress */
3755 ip6_set_solicited_node_multicast_address (&a, 0);
3757 a.as_u8[0xd] = address->as_u8[0xd];
3758 a.as_u8[0xe] = address->as_u8[0xe];
3759 a.as_u8[0xf] = address->as_u8[0xf];
3763 /* try to create radv_info - does nothing if ipv6 already enabled */
3764 enable_ip6_interface (vm, sw_if_index);
3766 /* look up the radv_t information for this interface */
3767 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3769 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3773 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3776 if (!ip6_address_is_link_local_unicast (address))
3777 radv_info->ref_count++;
3779 ip6_neighbor_add_mld_prefix (radv_info, &a);
3786 /* look up the radv_t information for this interface */
3787 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3789 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3794 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3796 ip6_neighbor_del_mld_prefix (radv_info, &a);
3798 /* if interface up send MLDP "report" */
3799 radv_info->all_routers_mcast = 0;
3802 if (!ip6_address_is_link_local_unicast (address))
3803 radv_info->ref_count--;
3805 /* Ensure that IPv6 is disabled, and LL removed after ref_count reaches 0 */
3806 disable_ip6_interface (vm, sw_if_index);
3811 ip6_set_neighbor_limit (u32 neighbor_limit)
3813 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3815 nm->limit_neighbor_cache_size = neighbor_limit;
3819 static clib_error_t *
3820 ip6_neighbor_init (vlib_main_t * vm)
3822 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3823 ip6_main_t *im = &ip6_main;
3825 mhash_init (&nm->neighbor_index_by_key,
3826 /* value size */ sizeof (uword),
3827 /* key size */ sizeof (ip6_neighbor_key_t));
3829 icmp6_register_type (vm, ICMP6_neighbor_solicitation,
3830 ip6_icmp_neighbor_solicitation_node.index);
3831 icmp6_register_type (vm, ICMP6_neighbor_advertisement,
3832 ip6_icmp_neighbor_advertisement_node.index);
3833 icmp6_register_type (vm, ICMP6_router_solicitation,
3834 ip6_icmp_router_solicitation_node.index);
3835 icmp6_register_type (vm, ICMP6_router_advertisement,
3836 ip6_icmp_router_advertisement_node.index);
3838 /* handler node for ip6 neighbor discovery events and timers */
3839 vlib_register_node (vm, &ip6_icmp_neighbor_discovery_event_node);
3841 /* add call backs */
3842 ip6_add_del_interface_address_callback_t cb;
3843 memset (&cb, 0x0, sizeof (ip6_add_del_interface_address_callback_t));
3845 /* when an interface address changes... */
3846 cb.function = ip6_neighbor_add_del_interface_address;
3847 cb.function_opaque = 0;
3848 vec_add1 (im->add_del_interface_address_callbacks, cb);
3850 mhash_init (&nm->pending_resolutions_by_address,
3851 /* value size */ sizeof (uword),
3852 /* key size */ sizeof (ip6_address_t));
3854 mhash_init (&nm->mac_changes_by_address,
3855 /* value size */ sizeof (uword),
3856 /* key size */ sizeof (ip6_address_t));
3858 /* default, configurable */
3859 nm->limit_neighbor_cache_size = 50000;
3862 /* $$$$ Hack fix for today */
3863 vec_validate_init_empty
3864 (im->discover_neighbor_next_index_by_hw_if_index, 32, 0 /* drop */ );
3870 VLIB_INIT_FUNCTION (ip6_neighbor_init);
3874 vnet_register_ip6_neighbor_resolution_event (vnet_main_t * vnm,
3877 uword type_opaque, uword data)
3879 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3880 ip6_address_t *address = address_arg;
3882 pending_resolution_t *pr;
3884 pool_get (nm->pending_resolutions, pr);
3886 pr->next_index = ~0;
3887 pr->node_index = node_index;
3888 pr->type_opaque = type_opaque;
3891 p = mhash_get (&nm->pending_resolutions_by_address, address);
3894 /* Insert new resolution at the head of the list */
3895 pr->next_index = p[0];
3896 mhash_unset (&nm->pending_resolutions_by_address, address, 0);
3899 mhash_set (&nm->pending_resolutions_by_address, address,
3900 pr - nm->pending_resolutions, 0 /* old value */ );
3904 vnet_add_del_ip6_nd_change_event (vnet_main_t * vnm,
3905 void *data_callback,
3909 uword type_opaque, uword data, int is_add)
3911 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3912 ip6_address_t *address = address_arg;
3914 /* Try to find an existing entry */
3915 u32 *first = (u32 *) mhash_get (&nm->mac_changes_by_address, address);
3917 pending_resolution_t *mc;
3918 while (p && *p != ~0)
3920 mc = pool_elt_at_index (nm->mac_changes, *p);
3921 if (mc->node_index == node_index && mc->type_opaque == type_opaque
3924 p = &mc->next_index;
3927 int found = p && *p != ~0;
3931 return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
3933 pool_get (nm->mac_changes, mc);
3934 *mc = (pending_resolution_t)
3936 .next_index = ~0,.node_index = node_index,.type_opaque =
3937 type_opaque,.data = data,.data_callback = data_callback,.pid =
3940 /* Insert new resolution at the end of the list */
3941 u32 new_idx = mc - nm->mac_changes;
3945 mhash_set (&nm->mac_changes_by_address, address, new_idx, 0);
3950 return VNET_API_ERROR_NO_SUCH_ENTRY;
3952 /* Clients may need to clean up pool entries, too */
3953 void (*fp) (u32, u8 *) = data_callback;
3955 (*fp) (mc->data, 0 /* no new mac addrs */ );
3957 /* Remove the entry from the list and delete the entry */
3958 *p = mc->next_index;
3959 pool_put (nm->mac_changes, mc);
3961 /* Remove from hash if we deleted the last entry */
3962 if (*p == ~0 && p == first)
3963 mhash_unset (&nm->mac_changes_by_address, address, 0);
3969 vnet_ip6_nd_term (vlib_main_t * vm,
3970 vlib_node_runtime_t * node,
3972 ethernet_header_t * eth,
3973 ip6_header_t * ip, u32 sw_if_index, u16 bd_index)
3975 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3976 icmp6_neighbor_solicitation_or_advertisement_header_t *ndh;
3977 pending_resolution_t *mc;
3979 ndh = ip6_next_header (ip);
3980 if (ndh->icmp.type != ICMP6_neighbor_solicitation &&
3981 ndh->icmp.type != ICMP6_neighbor_advertisement)
3984 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
3985 (p0->flags & VLIB_BUFFER_IS_TRACED)))
3987 u8 *t0 = vlib_add_trace (vm, node, p0,
3988 sizeof (icmp6_input_trace_t));
3989 clib_memcpy (t0, ip, sizeof (icmp6_input_trace_t));
3992 /* Check if anyone want ND events for L2 BDs */
3993 uword *p = mhash_get (&nm->mac_changes_by_address, &ip6a_zero);
3994 if (p && !ip6_address_is_link_local_unicast (&ip->src_address))
3996 u32 next_index = p[0];
3997 while (next_index != (u32) ~ 0)
3999 int (*fp) (u32, u8 *, u32, ip6_address_t *);
4001 mc = pool_elt_at_index (nm->mac_changes, next_index);
4002 fp = mc->data_callback;
4003 /* Call the callback, return 1 to suppress dup events */
4005 rv = (*fp) (mc->data,
4006 eth->src_address, sw_if_index, &ip->src_address);
4007 /* Signal the resolver process */
4009 vlib_process_signal_event (vm, mc->node_index,
4010 mc->type_opaque, mc->data);
4011 next_index = mc->next_index;
4015 /* Check if MAC entry exsist for solicited target IP */
4016 if (ndh->icmp.type == ICMP6_neighbor_solicitation)
4018 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *opt;
4019 l2_bridge_domain_t *bd_config;
4022 opt = (void *) (ndh + 1);
4023 if ((opt->header.type !=
4024 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address) ||
4025 (opt->header.n_data_u64s != 1))
4026 return 0; /* source link layer address option not present */
4028 bd_config = vec_elt_at_index (l2input_main.bd_configs, bd_index);
4030 (u8 *) hash_get_mem (bd_config->mac_by_ip6, &ndh->target_address);
4032 { /* found ip-mac entry, generate eighbor advertisement response */
4034 vlib_node_runtime_t *error_node =
4035 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
4036 ip->dst_address = ip->src_address;
4037 ip->src_address = ndh->target_address;
4038 ip->hop_limit = 255;
4040 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
4041 clib_memcpy (opt->ethernet_address, macp, 6);
4042 ndh->icmp.type = ICMP6_neighbor_advertisement;
4043 ndh->advertisement_flags = clib_host_to_net_u32
4044 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED |
4045 ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
4046 ndh->icmp.checksum = 0;
4047 ndh->icmp.checksum =
4048 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip, &bogus_length);
4049 clib_memcpy (eth->dst_address, eth->src_address, 6);
4050 clib_memcpy (eth->src_address, macp, 6);
4051 vlib_error_count (vm, error_node->node_index,
4052 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX, 1);
4062 ip6_neighbor_proxy_add_del (u32 sw_if_index, ip6_address_t * addr, u8 is_del)
4066 fib_prefix_t pfx = {
4068 .fp_proto = FIB_PROTOCOL_IP6,
4073 ip46_address_t nh = {
4077 fib_index = ip6_fib_table_get_index_for_sw_if_index (sw_if_index);
4079 if (~0 == fib_index)
4080 return VNET_API_ERROR_NO_SUCH_FIB;
4084 fib_table_entry_path_remove (fib_index,
4086 FIB_SOURCE_IP6_ND_PROXY,
4090 ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
4091 /* flush the ND cache of this address if it's there */
4092 vnet_unset_ip6_ethernet_neighbor (vlib_get_main (),
4093 sw_if_index, addr, NULL, 0);
4097 fib_table_entry_path_add (fib_index,
4099 FIB_SOURCE_IP6_ND_PROXY,
4100 FIB_ENTRY_FLAG_NONE,
4104 ~0, 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
4109 static clib_error_t *
4110 set_ip6_nd_proxy_cmd (vlib_main_t * vm,
4111 unformat_input_t * input, vlib_cli_command_t * cmd)
4113 vnet_main_t *vnm = vnet_get_main ();
4114 clib_error_t *error = 0;
4119 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
4121 /* get the rest of the command */
4122 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
4124 if (unformat (input, "%U", unformat_ip6_address, &addr))
4126 else if (unformat (input, "delete") || unformat (input, "del"))
4129 return (unformat_parse_error (input));
4133 ip6_neighbor_proxy_add_del (sw_if_index, &addr, is_del);
4139 VLIB_CLI_COMMAND (set_ip6_nd_proxy_command, static) =
4141 .path = "set ip6 nd proxy",
4142 .short_help = "set ip6 nd proxy <HOST> <INTERFACE>",
4143 .function = set_ip6_nd_proxy_cmd,
4148 ethernet_ndp_change_mac (u32 sw_if_index)
4150 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4154 pool_foreach (n, nm->neighbor_pool,
4156 if (n->key.sw_if_index == sw_if_index)
4158 adj_nbr_walk_nh6 (sw_if_index,
4159 &n->key.ip6_address,
4160 ip6_nd_mk_complete_walk, n);
4167 * fd.io coding-style-patch-verification: ON
4170 * eval: (c-set-style "gnu")