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>
30 * @brief IPv6 Neighbor Adjacency and Neighbor Discovery.
32 * The files contains the API and CLI code for managing IPv6 neighbor
33 * adjacency tables and neighbor discovery logic.
36 /* can't use sizeof link_layer_address, that's 8 */
37 #define ETHER_MAC_ADDR_LEN 6
39 /* advertised prefix option */
42 /* basic advertised information */
46 int adv_autonomous_flag;
47 u32 adv_valid_lifetime_in_secs;
48 u32 adv_pref_lifetime_in_secs;
50 /* advertised values are computed from these times if decrementing */
51 f64 valid_lifetime_expires;
52 f64 pref_lifetime_expires;
54 /* local information */
56 int deprecated_prefix_flag;
57 int decrement_lifetime_flag;
59 #define MIN_ADV_VALID_LIFETIME 7203 /* seconds */
60 #define DEF_ADV_VALID_LIFETIME 2592000
61 #define DEF_ADV_PREF_LIFETIME 604800
63 /* extensions are added here, mobile, DNS etc.. */
69 /* group information */
71 ip6_address_t mcast_address;
73 ip6_address_t *mcast_source_address_pool;
76 /* configured router advertisement information per ipv6 interface */
80 /* advertised config information, zero means unspecified */
84 u16 adv_router_lifetime_in_sec;
85 u32 adv_neighbor_reachable_time_in_msec;
86 u32 adv_time_in_msec_between_retransmitted_neighbor_solicitations;
91 /* source link layer option */
92 u8 link_layer_address[8];
93 u8 link_layer_addr_len;
96 ip6_radv_prefix_t *adv_prefixes_pool;
98 /* Hash table mapping address to index in interface advertised prefix pool. */
99 mhash_t address_to_prefix_index;
101 /* MLDP group information */
102 ip6_mldp_group_t *mldp_group_pool;
104 /* Hash table mapping address to index in mldp address pool. */
105 mhash_t address_to_mldp_index;
107 /* 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 static ip6_neighbor_main_t ip6_neighbor_main;
201 static ip6_address_t ip6a_zero; /* ip6 address 0 */
204 format_ip6_neighbor_ip6_entry (u8 * s, va_list * va)
206 vlib_main_t *vm = va_arg (*va, vlib_main_t *);
207 ip6_neighbor_t *n = va_arg (*va, ip6_neighbor_t *);
208 vnet_main_t *vnm = vnet_get_main ();
209 vnet_sw_interface_t *si;
213 return format (s, "%=12s%=20s%=6s%=20s%=40s", "Time", "Address", "Flags",
214 "Link layer", "Interface");
216 if (n->flags & IP6_NEIGHBOR_FLAG_DYNAMIC)
217 flags = format (flags, "D");
219 if (n->flags & IP6_NEIGHBOR_FLAG_STATIC)
220 flags = format (flags, "S");
222 si = vnet_get_sw_interface (vnm, n->key.sw_if_index);
223 s = format (s, "%=12U%=20U%=6s%=20U%=40U",
224 format_vlib_cpu_time, vm, n->cpu_time_last_updated,
225 format_ip6_address, &n->key.ip6_address,
226 flags ? (char *) flags : "",
227 format_ethernet_address, n->link_layer_address,
228 format_vnet_sw_interface_name, vnm, si);
234 static clib_error_t *
235 ip6_neighbor_sw_interface_up_down (vnet_main_t * vnm,
236 u32 sw_if_index, u32 flags)
238 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
241 if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
243 u32 i, *to_delete = 0;
246 pool_foreach (n, nm->neighbor_pool,
248 if (n->key.sw_if_index == sw_if_index)
249 vec_add1 (to_delete, n - nm->neighbor_pool);
253 for (i = 0; i < vec_len (to_delete); i++)
255 n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
256 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
257 fib_table_entry_delete_index (n->fib_entry_index, FIB_SOURCE_ADJ);
258 pool_put (nm->neighbor_pool, n);
261 vec_free (to_delete);
267 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_neighbor_sw_interface_up_down);
270 unset_random_neighbor_entry (void)
272 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
273 vnet_main_t *vnm = vnet_get_main ();
274 vlib_main_t *vm = vnm->vlib_main;
278 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
279 nm->neighbor_delete_rotor = index;
281 /* Try again from elt 0, could happen if an intfc goes down */
284 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
285 nm->neighbor_delete_rotor = index;
288 /* Nothing left in the pool */
292 e = pool_elt_at_index (nm->neighbor_pool, index);
294 vnet_unset_ip6_ethernet_neighbor (vm, e->key.sw_if_index,
296 e->link_layer_address,
304 u8 link_layer_address[6];
307 } ip6_neighbor_set_unset_rpc_args_t;
309 static void ip6_neighbor_set_unset_rpc_callback
310 (ip6_neighbor_set_unset_rpc_args_t * a);
312 static void set_unset_ip6_neighbor_rpc
315 ip6_address_t * a, u8 * link_layer_addreess, int is_add, int is_static)
317 ip6_neighbor_set_unset_rpc_args_t args;
318 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
320 args.sw_if_index = sw_if_index;
321 args.is_add = is_add;
322 args.is_static = is_static;
323 clib_memcpy (&args.addr, a, sizeof (*a));
324 clib_memcpy (args.link_layer_address, link_layer_addreess, 6);
326 vl_api_rpc_call_main_thread (ip6_neighbor_set_unset_rpc_callback,
327 (u8 *) & args, sizeof (args));
331 ip6_nbr_probe (ip_adjacency_t * adj)
333 icmp6_neighbor_solicitation_header_t *h;
334 vnet_main_t *vnm = vnet_get_main ();
335 ip6_main_t *im = &ip6_main;
336 ip_interface_address_t *ia;
337 ip6_address_t *dst, *src;
338 vnet_hw_interface_t *hi;
339 vnet_sw_interface_t *si;
345 vm = vlib_get_main ();
347 si = vnet_get_sw_interface (vnm, adj->rewrite_header.sw_if_index);
348 dst = &adj->sub_type.nbr.next_hop.ip6;
350 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
354 src = ip6_interface_address_matching_destination (im, dst,
362 h = vlib_packet_template_get_packet (vm,
363 &im->discover_neighbor_packet_template,
366 hi = vnet_get_sup_hw_interface (vnm, adj->rewrite_header.sw_if_index);
368 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
369 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
370 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
371 h->ip.src_address = src[0];
372 h->neighbor.target_address = dst[0];
374 clib_memcpy (h->link_layer_option.ethernet_address,
375 hi->hw_address, vec_len (hi->hw_address));
377 h->neighbor.icmp.checksum =
378 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
379 ASSERT (bogus_length == 0);
381 b = vlib_get_buffer (vm, bi);
382 vnet_buffer (b)->sw_if_index[VLIB_RX] =
383 vnet_buffer (b)->sw_if_index[VLIB_TX] = adj->rewrite_header.sw_if_index;
385 /* Add encapsulation string for software interface (e.g. ethernet header). */
386 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
387 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
390 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
391 u32 *to_next = vlib_frame_vector_args (f);
394 vlib_put_frame_to_node (vm, hi->output_node_index, f);
399 ip6_nd_mk_complete (adj_index_t ai, ip6_neighbor_t * nbr)
401 adj_nbr_update_rewrite (ai, ADJ_NBR_REWRITE_FLAG_COMPLETE,
402 ethernet_build_rewrite (vnet_get_main (),
403 nbr->key.sw_if_index,
404 adj_get_link_type (ai),
405 nbr->link_layer_address));
409 ip6_nd_mk_incomplete (adj_index_t ai)
411 ip_adjacency_t *adj = adj_get (ai);
413 adj_nbr_update_rewrite (ai,
414 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
415 ethernet_build_rewrite (vnet_get_main (),
418 adj_get_link_type (ai),
419 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
422 #define IP6_NBR_MK_KEY(k, sw_if_index, addr) \
424 k.sw_if_index = sw_if_index; \
425 k.ip6_address = *addr; \
429 static ip6_neighbor_t *
430 ip6_nd_find (u32 sw_if_index, const ip6_address_t * addr)
432 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
433 ip6_neighbor_t *n = NULL;
434 ip6_neighbor_key_t k;
437 IP6_NBR_MK_KEY (k, sw_if_index, addr);
439 p = mhash_get (&nm->neighbor_index_by_key, &k);
442 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
449 ip6_nd_mk_complete_walk (adj_index_t ai, void *ctx)
451 ip6_neighbor_t *nbr = ctx;
453 ip6_nd_mk_complete (ai, nbr);
455 return (ADJ_WALK_RC_CONTINUE);
459 ip6_nd_mk_incomplete_walk (adj_index_t ai, void *ctx)
461 ip6_nd_mk_incomplete (ai);
463 return (ADJ_WALK_RC_CONTINUE);
467 ip6_ethernet_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
474 nbr = ip6_nd_find (sw_if_index, &adj->sub_type.nbr.next_hop.ip6);
476 switch (adj->lookup_next_index)
478 case IP_LOOKUP_NEXT_ARP:
479 case IP_LOOKUP_NEXT_GLEAN:
482 adj_nbr_walk_nh6 (sw_if_index, &nbr->key.ip6_address,
483 ip6_nd_mk_complete_walk, nbr);
488 * no matching ND entry.
489 * construct the rewrite required to for an ND packet, and stick
490 * that in the adj's pipe to smoke.
492 adj_nbr_update_rewrite (ai,
493 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
494 ethernet_build_rewrite (vnm,
497 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
500 * since the FIB has added this adj for a route, it makes sense it may
501 * want to forward traffic sometime soon. Let's send a speculative ND.
502 * just one. If we were to do periodically that wouldn't be bad either,
503 * but that's more code than i'm prepared to write at this time for
504 * relatively little reward.
509 case IP_LOOKUP_NEXT_MCAST:
511 * Construct a partial rewrite from the known ethernet mcast dest MAC
513 adj_mcast_update_rewrite
515 ethernet_build_rewrite (vnm,
518 ethernet_ip6_mcast_dst_addr ()));
521 * Complete the remaining fields of the adj's rewrite to direct the
522 * complete of the rewrite at switch time by copying in the IP
523 * dst address's bytes.
524 * Ofset is 12 bytes from the end of the MAC header - which is 2
525 * bytes into the desintation address. And we write 4 bytes.
527 adj->rewrite_header.dst_mcast_offset = 12;
528 adj->rewrite_header.dst_mcast_n_bytes = 4;
532 case IP_LOOKUP_NEXT_DROP:
533 case IP_LOOKUP_NEXT_PUNT:
534 case IP_LOOKUP_NEXT_LOCAL:
535 case IP_LOOKUP_NEXT_REWRITE:
536 case IP_LOOKUP_NEXT_LOAD_BALANCE:
537 case IP_LOOKUP_NEXT_MIDCHAIN:
538 case IP_LOOKUP_NEXT_ICMP_ERROR:
539 case IP_LOOKUP_N_NEXT:
546 vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
549 u8 * link_layer_address,
550 uword n_bytes_link_layer_address,
553 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
554 ip6_neighbor_key_t k;
555 ip6_neighbor_t *n = 0;
556 int make_new_nd_cache_entry = 1;
559 pending_resolution_t *pr, *mc;
561 if (os_get_cpu_number ())
563 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
564 1 /* set new neighbor */ , is_static);
568 k.sw_if_index = sw_if_index;
569 k.ip6_address = a[0];
572 p = mhash_get (&nm->neighbor_index_by_key, &k);
575 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
576 /* Refuse to over-write static neighbor entry. */
577 if (!is_static && (n->flags & IP6_NEIGHBOR_FLAG_STATIC))
579 make_new_nd_cache_entry = 0;
582 if (make_new_nd_cache_entry)
586 .fp_proto = FIB_PROTOCOL_IP6,
588 .ip6 = k.ip6_address,
594 pool_get (nm->neighbor_pool, n);
595 mhash_set (&nm->neighbor_index_by_key, &k, n - nm->neighbor_pool,
599 clib_memcpy (n->link_layer_address,
600 link_layer_address, n_bytes_link_layer_address);
603 * create the adj-fib. the entry in the FIB table for and to the peer.
605 fib_index = ip6_main.fib_index_by_sw_if_index[n->key.sw_if_index];
606 n->fib_entry_index = fib_table_entry_update_one_path (fib_index, &pfx, FIB_SOURCE_ADJ, FIB_ENTRY_FLAG_NONE, FIB_PROTOCOL_IP6, &pfx.fp_addr, n->key.sw_if_index, ~0, 1, NULL, // no label stack
607 FIB_ROUTE_PATH_FLAG_NONE);
612 * prevent a DoS attack from the data-plane that
613 * spams us with no-op updates to the MAC address
615 if (0 == memcmp (n->link_layer_address,
616 link_layer_address, n_bytes_link_layer_address))
619 clib_memcpy (n->link_layer_address,
620 link_layer_address, n_bytes_link_layer_address);
623 /* Update time stamp and flags. */
624 n->cpu_time_last_updated = clib_cpu_time_now ();
626 n->flags |= IP6_NEIGHBOR_FLAG_STATIC;
628 n->flags |= IP6_NEIGHBOR_FLAG_DYNAMIC;
630 adj_nbr_walk_nh6 (sw_if_index,
631 &n->key.ip6_address, ip6_nd_mk_complete_walk, n);
633 /* Customer(s) waiting for this address to be resolved? */
634 p = mhash_get (&nm->pending_resolutions_by_address, a);
639 while (next_index != (u32) ~ 0)
641 pr = pool_elt_at_index (nm->pending_resolutions, next_index);
642 vlib_process_signal_event (vm, pr->node_index,
643 pr->type_opaque, pr->data);
644 next_index = pr->next_index;
645 pool_put (nm->pending_resolutions, pr);
648 mhash_unset (&nm->pending_resolutions_by_address, a, 0);
651 /* Customer(s) requesting ND event for this address? */
652 p = mhash_get (&nm->mac_changes_by_address, a);
657 while (next_index != (u32) ~ 0)
659 int (*fp) (u32, u8 *, u32, ip6_address_t *);
661 mc = pool_elt_at_index (nm->mac_changes, next_index);
662 fp = mc->data_callback;
664 /* Call the user's data callback, return 1 to suppress dup events */
667 (*fp) (mc->data, link_layer_address, sw_if_index, &ip6a_zero);
669 * Signal the resolver process, as long as the user
670 * says they want to be notified
673 vlib_process_signal_event (vm, mc->node_index,
674 mc->type_opaque, mc->data);
675 next_index = mc->next_index;
683 vnet_unset_ip6_ethernet_neighbor (vlib_main_t * vm,
686 u8 * link_layer_address,
687 uword n_bytes_link_layer_address)
689 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
690 ip6_neighbor_key_t k;
695 if (os_get_cpu_number ())
697 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
702 k.sw_if_index = sw_if_index;
703 k.ip6_address = a[0];
706 p = mhash_get (&nm->neighbor_index_by_key, &k);
713 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
714 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
716 adj_nbr_walk_nh6 (sw_if_index,
717 &n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL);
719 fib_table_entry_delete_index (n->fib_entry_index, FIB_SOURCE_ADJ);
720 pool_put (nm->neighbor_pool, n);
726 static void ip6_neighbor_set_unset_rpc_callback
727 (ip6_neighbor_set_unset_rpc_args_t * a)
729 vlib_main_t *vm = vlib_get_main ();
731 vnet_set_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
732 a->link_layer_address, 6, a->is_static);
734 vnet_unset_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
735 a->link_layer_address, 6);
739 ip6_neighbor_sort (void *a1, void *a2)
741 vnet_main_t *vnm = vnet_get_main ();
742 ip6_neighbor_t *n1 = a1, *n2 = a2;
744 cmp = vnet_sw_interface_compare (vnm, n1->key.sw_if_index,
745 n2->key.sw_if_index);
747 cmp = ip6_address_compare (&n1->key.ip6_address, &n2->key.ip6_address);
752 ip6_neighbors_entries (u32 sw_if_index)
754 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
755 ip6_neighbor_t *n, *ns = 0;
758 pool_foreach (n, nm->neighbor_pool,
760 if (sw_if_index != ~0 && n->key.sw_if_index != sw_if_index)
767 vec_sort_with_function (ns, ip6_neighbor_sort);
771 static clib_error_t *
772 show_ip6_neighbors (vlib_main_t * vm,
773 unformat_input_t * input, vlib_cli_command_t * cmd)
775 vnet_main_t *vnm = vnet_get_main ();
776 ip6_neighbor_t *n, *ns;
777 clib_error_t *error = 0;
780 /* Filter entries by interface if given. */
782 (void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index);
784 ns = ip6_neighbors_entries (sw_if_index);
787 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, 0);
790 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, n);
799 * This command is used to display the adjacent IPv6 hosts found via
800 * neighbor discovery. Optionally, limit the output to the specified
804 * Example of how to display the IPv6 neighbor adjacency table:
805 * @cliexstart{show ip6 neighbors}
806 * Time Address Flags Link layer Interface
807 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
808 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
809 * 886.6654 ::1:1:c:0:9 S 02:fe:e4:45:27:5b GigabitEthernet3/0/0
811 * Example of how to display the IPv6 neighbor adjacency table for given interface:
812 * @cliexstart{show ip6 neighbors GigabitEthernet2/0/0}
813 * Time Address Flags Link layer Interface
814 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
815 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
819 VLIB_CLI_COMMAND (show_ip6_neighbors_command, static) = {
820 .path = "show ip6 neighbors",
821 .function = show_ip6_neighbors,
822 .short_help = "show ip6 neighbors [<interface>]",
826 static clib_error_t *
827 set_ip6_neighbor (vlib_main_t * vm,
828 unformat_input_t * input, vlib_cli_command_t * cmd)
830 vnet_main_t *vnm = vnet_get_main ();
838 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
840 /* intfc, ip6-address, mac-address */
841 if (unformat (input, "%U %U %U",
842 unformat_vnet_sw_interface, vnm, &sw_if_index,
843 unformat_ip6_address, &addr,
844 unformat_ethernet_address, mac_address))
847 else if (unformat (input, "delete") || unformat (input, "del"))
849 else if (unformat (input, "static"))
856 return clib_error_return (0, "Missing interface, ip6 or hw address");
859 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
860 mac_address, sizeof (mac_address),
863 vnet_unset_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
864 mac_address, sizeof (mac_address));
869 * This command is used to manually add an entry to the IPv6 neighbor
870 * adjacency table. Optionally, the entry can be added as static. It is
871 * also used to remove an entry from the table. Use the '<em>show ip6
872 * neighbors</em>' command to display all learned and manually entered entries.
875 * Example of how to add a static entry to the IPv6 neighbor adjacency table:
876 * @cliexcmd{set ip6 neighbor GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b static}
877 * Example of how to delete an entry from the IPv6 neighbor adjacency table:
878 * @cliexcmd{set ip6 neighbor del GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b}
881 VLIB_CLI_COMMAND (set_ip6_neighbor_command, static) =
883 .path = "set ip6 neighbor",
884 .function = set_ip6_neighbor,
885 .short_help = "set ip6 neighbor [del] <interface> <ip6-address> <mac-address> [static]",
891 ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP,
892 ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY,
893 ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
894 } icmp6_neighbor_solicitation_or_advertisement_next_t;
896 static_always_inline uword
897 icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
898 vlib_node_runtime_t * node,
899 vlib_frame_t * frame,
900 uword is_solicitation)
902 vnet_main_t *vnm = vnet_get_main ();
903 ip6_main_t *im = &ip6_main;
904 uword n_packets = frame->n_vectors;
906 u32 n_left_from, n_left_to_next, next_index, n_advertisements_sent;
907 icmp6_neighbor_discovery_option_type_t option_type;
908 vlib_node_runtime_t *error_node =
909 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
912 from = vlib_frame_vector_args (frame);
913 n_left_from = n_packets;
914 next_index = node->cached_next_index;
916 if (node->flags & VLIB_NODE_FLAG_TRACE)
917 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
919 sizeof (icmp6_input_trace_t));
923 ? ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address
924 : ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address);
925 n_advertisements_sent = 0;
927 while (n_left_from > 0)
929 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
931 while (n_left_from > 0 && n_left_to_next > 0)
935 icmp6_neighbor_solicitation_or_advertisement_header_t *h0;
936 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
937 u32 bi0, options_len0, sw_if_index0, next0, error0;
938 u32 ip6_sadd_link_local, ip6_sadd_unspecified;
942 bi0 = to_next[0] = from[0];
949 p0 = vlib_get_buffer (vm, bi0);
950 ip0 = vlib_buffer_get_current (p0);
951 h0 = ip6_next_header (ip0);
953 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
955 error0 = ICMP6_ERROR_NONE;
956 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
957 ip6_sadd_link_local =
958 ip6_address_is_link_local_unicast (&ip0->src_address);
959 ip6_sadd_unspecified =
960 ip6_address_is_unspecified (&ip0->src_address);
962 /* Check that source address is unspecified, link-local or else on-link. */
963 if (!ip6_sadd_unspecified && !ip6_sadd_link_local)
965 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
967 if (ADJ_INDEX_INVALID != src_adj_index0)
969 ip_adjacency_t *adj0 =
970 ip_get_adjacency (&im->lookup_main, src_adj_index0);
972 /* Allow all realistic-looking rewrite adjacencies to pass */
973 ni0 = adj0->lookup_next_index;
974 is_rewrite0 = (ni0 >= IP_LOOKUP_NEXT_ARP) &&
975 (ni0 < IP6_LOOKUP_N_NEXT);
977 error0 = ((adj0->rewrite_header.sw_if_index != sw_if_index0
980 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK
986 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK;
990 o0 = (void *) (h0 + 1);
991 o0 = ((options_len0 == 8 && o0->header.type == option_type
992 && o0->header.n_data_u64s == 1) ? o0 : 0);
994 /* If src address unspecified or link local, donot learn neighbor MAC */
995 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
996 !ip6_sadd_unspecified && !ip6_sadd_link_local))
998 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
999 if (nm->limit_neighbor_cache_size &&
1000 pool_elts (nm->neighbor_pool) >=
1001 nm->limit_neighbor_cache_size)
1002 unset_random_neighbor_entry ();
1003 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1006 &h0->target_address,
1007 o0->ethernet_address,
1008 sizeof (o0->ethernet_address),
1012 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1014 /* Check that target address is local to this router. */
1015 fib_node_index_t fei;
1019 ip6_fib_table_get_index_for_sw_if_index (sw_if_index0);
1021 if (~0 == fib_index)
1023 error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1027 fei = ip6_fib_table_lookup_exact_match (fib_index,
1028 &h0->target_address,
1031 if (FIB_NODE_INDEX_INVALID == fei ||
1032 !(FIB_ENTRY_FLAG_LOCAL &
1033 fib_entry_get_flags_for_source (fei,
1034 FIB_SOURCE_INTERFACE)))
1037 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1042 if (is_solicitation)
1043 next0 = (error0 != ICMP6_ERROR_NONE
1044 ? ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP
1045 : ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY);
1049 error0 = error0 == ICMP6_ERROR_NONE ?
1050 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_RX : error0;
1053 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1055 vnet_sw_interface_t *sw_if0;
1056 ethernet_interface_t *eth_if0;
1057 ethernet_header_t *eth0;
1059 /* dst address is either source address or the all-nodes mcast addr */
1060 if (!ip6_sadd_unspecified)
1061 ip0->dst_address = ip0->src_address;
1063 ip6_set_reserved_multicast_address (&ip0->dst_address,
1064 IP6_MULTICAST_SCOPE_link_local,
1065 IP6_MULTICAST_GROUP_ID_all_hosts);
1067 ip0->src_address = h0->target_address;
1068 ip0->hop_limit = 255;
1069 h0->icmp.type = ICMP6_neighbor_advertisement;
1071 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1072 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1074 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1077 clib_memcpy (o0->ethernet_address, eth_if0->address, 6);
1079 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
1082 h0->advertisement_flags = clib_host_to_net_u32
1083 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED
1084 | ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
1086 h0->icmp.checksum = 0;
1088 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1090 ASSERT (bogus_length == 0);
1092 /* Reuse current MAC header, copy SMAC to DMAC and
1093 * interface MAC to SMAC */
1094 vlib_buffer_advance (p0, -ethernet_buffer_header_size (p0));
1095 eth0 = vlib_buffer_get_current (p0);
1096 clib_memcpy (eth0->dst_address, eth0->src_address, 6);
1098 clib_memcpy (eth0->src_address, eth_if0->address, 6);
1100 /* Setup input and output sw_if_index for packet */
1101 ASSERT (vnet_buffer (p0)->sw_if_index[VLIB_RX] == sw_if_index0);
1102 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1103 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1104 vnet_main.local_interface_sw_if_index;
1106 n_advertisements_sent++;
1109 p0->error = error_node->errors[error0];
1111 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1112 to_next, n_left_to_next,
1116 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1119 /* Account for advertisements sent. */
1120 vlib_error_count (vm, error_node->node_index,
1121 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX,
1122 n_advertisements_sent);
1124 return frame->n_vectors;
1127 /* for "syslogging" - use elog for now */
1128 #define foreach_log_level \
1129 _ (DEBUG, "DEBUG") \
1130 _ (INFO, "INFORMATION") \
1131 _ (NOTICE, "NOTICE") \
1132 _ (WARNING, "WARNING") \
1134 _ (CRIT, "CRITICAL") \
1135 _ (ALERT, "ALERT") \
1136 _ (EMERG, "EMERGENCY")
1140 #define _(f,s) LOG_##f,
1145 static char *log_level_strings[] = {
1151 static int logmask = 1 << LOG_DEBUG;
1154 ip6_neighbor_syslog (vlib_main_t * vm, int priority, char *fmt, ...)
1156 /* just use elog for now */
1160 if ((priority > LOG_EMERG) || !(logmask & (1 << priority)))
1166 what = va_format (0, fmt, &va);
1168 ELOG_TYPE_DECLARE (e) =
1170 .format = "ip6 nd: (%s): %s",.format_args = "T4T4",};
1175 ed = ELOG_DATA (&vm->elog_main, e);
1176 ed->s[0] = elog_string (&vm->elog_main, log_level_strings[priority]);
1177 ed->s[1] = elog_string (&vm->elog_main, (char *) what);
1183 /* ipv6 neighbor discovery - router advertisements */
1186 ICMP6_ROUTER_SOLICITATION_NEXT_DROP,
1187 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW,
1188 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX,
1189 ICMP6_ROUTER_SOLICITATION_N_NEXT,
1190 } icmp6_router_solicitation_or_advertisement_next_t;
1192 static_always_inline uword
1193 icmp6_router_solicitation (vlib_main_t * vm,
1194 vlib_node_runtime_t * node, vlib_frame_t * frame)
1196 vnet_main_t *vnm = vnet_get_main ();
1197 ip6_main_t *im = &ip6_main;
1198 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1199 uword n_packets = frame->n_vectors;
1200 u32 *from, *to_next;
1201 u32 n_left_from, n_left_to_next, next_index;
1202 u32 n_advertisements_sent = 0;
1205 icmp6_neighbor_discovery_option_type_t option_type;
1207 vlib_node_runtime_t *error_node =
1208 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1210 from = vlib_frame_vector_args (frame);
1211 n_left_from = n_packets;
1212 next_index = node->cached_next_index;
1214 if (node->flags & VLIB_NODE_FLAG_TRACE)
1215 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1217 sizeof (icmp6_input_trace_t));
1219 /* source may append his LL address */
1220 option_type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1222 while (n_left_from > 0)
1224 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1226 while (n_left_from > 0 && n_left_to_next > 0)
1230 ip6_radv_t *radv_info = 0;
1232 icmp6_neighbor_discovery_header_t *h0;
1233 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1235 u32 bi0, options_len0, sw_if_index0, next0, error0;
1236 u32 is_solicitation = 1, is_dropped = 0;
1237 u32 is_unspecified, is_link_local;
1239 bi0 = to_next[0] = from[0];
1244 n_left_to_next -= 1;
1246 p0 = vlib_get_buffer (vm, bi0);
1247 ip0 = vlib_buffer_get_current (p0);
1248 h0 = ip6_next_header (ip0);
1250 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1251 is_unspecified = ip6_address_is_unspecified (&ip0->src_address);
1253 ip6_address_is_link_local_unicast (&ip0->src_address);
1255 error0 = ICMP6_ERROR_NONE;
1256 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1258 /* check if solicitation (not from nd_timer node) */
1259 if (ip6_address_is_unspecified (&ip0->dst_address))
1260 is_solicitation = 0;
1262 /* Check that source address is unspecified, link-local or else on-link. */
1263 if (!is_unspecified && !is_link_local)
1265 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1267 if (ADJ_INDEX_INVALID != src_adj_index0)
1269 ip_adjacency_t *adj0 = ip_get_adjacency (&im->lookup_main,
1272 error0 = (adj0->rewrite_header.sw_if_index != sw_if_index0
1274 ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK
1279 error0 = ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK;
1283 /* check for source LL option and process */
1284 o0 = (void *) (h0 + 1);
1285 o0 = ((options_len0 == 8
1286 && o0->header.type == option_type
1287 && o0->header.n_data_u64s == 1) ? o0 : 0);
1289 /* if src address unspecified IGNORE any options */
1290 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1291 !is_unspecified && !is_link_local))
1293 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1294 if (nm->limit_neighbor_cache_size &&
1295 pool_elts (nm->neighbor_pool) >=
1296 nm->limit_neighbor_cache_size)
1297 unset_random_neighbor_entry ();
1299 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1301 o0->ethernet_address,
1302 sizeof (o0->ethernet_address),
1306 /* default is to drop */
1307 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1309 if (error0 == ICMP6_ERROR_NONE)
1311 vnet_sw_interface_t *sw_if0;
1312 ethernet_interface_t *eth_if0;
1315 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1316 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1318 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1320 /* only support ethernet interface type for now */
1322 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1325 if (error0 == ICMP6_ERROR_NONE)
1329 /* adjust the sizeof the buffer to just include the ipv6 header */
1330 p0->current_length -=
1332 sizeof (icmp6_neighbor_discovery_header_t));
1334 /* look up the radv_t information for this interface */
1335 vec_validate_init_empty
1336 (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
1338 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1341 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1345 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1348 if (error0 == ICMP6_ERROR_NONE)
1350 f64 now = vlib_time_now (vm);
1352 /* for solicited adverts - need to rate limit */
1353 if (is_solicitation)
1355 if (0 != radv_info->last_radv_time &&
1356 (now - radv_info->last_radv_time) <
1357 MIN_DELAY_BETWEEN_RAS)
1360 radv_info->last_radv_time = now;
1364 icmp6_router_advertisement_header_t rh;
1366 rh.icmp.type = ICMP6_router_advertisement;
1368 rh.icmp.checksum = 0;
1370 rh.current_hop_limit = radv_info->curr_hop_limit;
1371 rh.router_lifetime_in_sec =
1372 clib_host_to_net_u16
1373 (radv_info->adv_router_lifetime_in_sec);
1375 time_in_msec_between_retransmitted_neighbor_solicitations
1377 clib_host_to_net_u32 (radv_info->
1378 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
1379 rh.neighbor_reachable_time_in_msec =
1380 clib_host_to_net_u32 (radv_info->
1381 adv_neighbor_reachable_time_in_msec);
1384 (radv_info->adv_managed_flag) ?
1385 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP :
1388 ((radv_info->adv_other_flag) ?
1389 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP :
1393 u16 payload_length =
1394 sizeof (icmp6_router_advertisement_header_t);
1396 vlib_buffer_add_data (vm,
1397 p0->free_list_index,
1401 (icmp6_router_advertisement_header_t));
1403 if (radv_info->adv_link_layer_address)
1405 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
1409 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1410 h.header.n_data_u64s = 1;
1412 /* copy ll address */
1413 clib_memcpy (&h.ethernet_address[0],
1414 eth_if0->address, 6);
1416 vlib_buffer_add_data (vm,
1417 p0->free_list_index,
1421 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t));
1425 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t);
1428 /* add MTU option */
1429 if (radv_info->adv_link_mtu)
1431 icmp6_neighbor_discovery_mtu_option_t h;
1435 clib_host_to_net_u32 (radv_info->adv_link_mtu);
1436 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu;
1437 h.header.n_data_u64s = 1;
1440 sizeof (icmp6_neighbor_discovery_mtu_option_t);
1442 vlib_buffer_add_data (vm,
1443 p0->free_list_index,
1447 (icmp6_neighbor_discovery_mtu_option_t));
1450 /* add advertised prefix options */
1451 ip6_radv_prefix_t *pr_info;
1454 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
1456 if(pr_info->enabled &&
1457 (!pr_info->decrement_lifetime_flag
1458 || (pr_info->pref_lifetime_expires >0)))
1460 /* advertise this prefix */
1461 icmp6_neighbor_discovery_prefix_information_option_t h;
1463 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information;
1464 h.header.n_data_u64s = (sizeof(icmp6_neighbor_discovery_prefix_information_option_t) >> 3);
1466 h.dst_address_length = pr_info->prefix_len;
1468 h.flags = (pr_info->adv_on_link_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_FLAG_ON_LINK : 0;
1469 h.flags |= (pr_info->adv_autonomous_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_AUTO : 0;
1471 if(radv_info->cease_radv && pr_info->deprecated_prefix_flag)
1473 h.valid_time = clib_host_to_net_u32(MIN_ADV_VALID_LIFETIME);
1474 h.preferred_time = 0;
1478 if(pr_info->decrement_lifetime_flag)
1480 pr_info->adv_valid_lifetime_in_secs = ((pr_info->valid_lifetime_expires > now)) ?
1481 (pr_info->valid_lifetime_expires - now) : 0;
1483 pr_info->adv_pref_lifetime_in_secs = ((pr_info->pref_lifetime_expires > now)) ?
1484 (pr_info->pref_lifetime_expires - now) : 0;
1487 h.valid_time = clib_host_to_net_u32(pr_info->adv_valid_lifetime_in_secs);
1488 h.preferred_time = clib_host_to_net_u32(pr_info->adv_pref_lifetime_in_secs) ;
1492 clib_memcpy(&h.dst_address, &pr_info->prefix, sizeof(ip6_address_t));
1494 payload_length += sizeof( icmp6_neighbor_discovery_prefix_information_option_t);
1496 vlib_buffer_add_data (vm,
1497 p0->free_list_index,
1499 (void *)&h, sizeof(icmp6_neighbor_discovery_prefix_information_option_t));
1505 /* add additional options before here */
1507 /* finish building the router advertisement... */
1508 if (!is_unspecified && radv_info->send_unicast)
1510 ip0->dst_address = ip0->src_address;
1514 /* target address is all-nodes mcast addr */
1515 ip6_set_reserved_multicast_address
1517 IP6_MULTICAST_SCOPE_link_local,
1518 IP6_MULTICAST_GROUP_ID_all_hosts);
1521 /* source address MUST be the link-local address */
1522 ip0->src_address = radv_info->link_local_address;
1524 ip0->hop_limit = 255;
1525 ip0->payload_length =
1526 clib_host_to_net_u16 (payload_length);
1528 icmp6_router_advertisement_header_t *rh0 =
1529 (icmp6_router_advertisement_header_t *) (ip0 + 1);
1530 rh0->icmp.checksum =
1531 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1533 ASSERT (bogus_length == 0);
1535 /* setup output if and adjacency */
1536 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1537 vnet_main.local_interface_sw_if_index;
1539 if (is_solicitation)
1541 ethernet_header_t *eth0;
1542 /* Reuse current MAC header, copy SMAC to DMAC and
1543 * interface MAC to SMAC */
1544 vlib_buffer_reset (p0);
1545 eth0 = vlib_buffer_get_current (p0);
1546 clib_memcpy (eth0->dst_address, eth0->src_address,
1548 clib_memcpy (eth0->src_address, eth_if0->address,
1551 is_dropped ? next0 :
1552 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX;
1553 vnet_buffer (p0)->sw_if_index[VLIB_TX] =
1558 adj_index0 = radv_info->mcast_adj_index;
1559 if (adj_index0 == 0)
1560 error0 = ICMP6_ERROR_DST_LOOKUP_MISS;
1564 is_dropped ? next0 :
1565 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW;
1566 vnet_buffer (p0)->ip.adj_index[VLIB_TX] =
1570 p0->flags |= VNET_BUFFER_LOCALLY_ORIGINATED;
1572 radv_info->n_solicitations_dropped += is_dropped;
1573 radv_info->n_solicitations_rcvd += is_solicitation;
1575 if ((error0 == ICMP6_ERROR_NONE) && !is_dropped)
1577 radv_info->n_advertisements_sent++;
1578 n_advertisements_sent++;
1584 p0->error = error_node->errors[error0];
1586 if (error0 != ICMP6_ERROR_NONE)
1587 vlib_error_count (vm, error_node->node_index, error0, 1);
1589 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1590 to_next, n_left_to_next,
1595 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1598 /* Account for router advertisements sent. */
1599 vlib_error_count (vm, error_node->node_index,
1600 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_TX,
1601 n_advertisements_sent);
1603 return frame->n_vectors;
1606 /* validate advertised info for consistancy (see RFC-4861 section 6.2.7) - log any inconsistencies, packet will always be dropped */
1607 static_always_inline uword
1608 icmp6_router_advertisement (vlib_main_t * vm,
1609 vlib_node_runtime_t * node, vlib_frame_t * frame)
1611 vnet_main_t *vnm = vnet_get_main ();
1612 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1613 uword n_packets = frame->n_vectors;
1614 u32 *from, *to_next;
1615 u32 n_left_from, n_left_to_next, next_index;
1616 u32 n_advertisements_rcvd = 0;
1618 vlib_node_runtime_t *error_node =
1619 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1621 from = vlib_frame_vector_args (frame);
1622 n_left_from = n_packets;
1623 next_index = node->cached_next_index;
1625 if (node->flags & VLIB_NODE_FLAG_TRACE)
1626 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1628 sizeof (icmp6_input_trace_t));
1630 while (n_left_from > 0)
1632 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1634 while (n_left_from > 0 && n_left_to_next > 0)
1638 ip6_radv_t *radv_info = 0;
1639 icmp6_router_advertisement_header_t *h0;
1640 u32 bi0, options_len0, sw_if_index0, next0, error0;
1642 bi0 = to_next[0] = from[0];
1647 n_left_to_next -= 1;
1649 p0 = vlib_get_buffer (vm, bi0);
1650 ip0 = vlib_buffer_get_current (p0);
1651 h0 = ip6_next_header (ip0);
1653 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1655 error0 = ICMP6_ERROR_NONE;
1656 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1658 /* Check that source address is link-local */
1659 error0 = (!ip6_address_is_link_local_unicast (&ip0->src_address)) ?
1660 ICMP6_ERROR_ROUTER_ADVERTISEMENT_SOURCE_NOT_LINK_LOCAL : error0;
1662 /* default is to drop */
1663 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1665 n_advertisements_rcvd++;
1667 if (error0 == ICMP6_ERROR_NONE)
1669 vnet_sw_interface_t *sw_if0;
1670 ethernet_interface_t *eth_if0;
1672 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1673 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1675 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1677 /* only support ethernet interface type for now */
1679 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1682 if (error0 == ICMP6_ERROR_NONE)
1686 /* look up the radv_t information for this interface */
1687 vec_validate_init_empty
1688 (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
1690 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1693 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1697 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1700 if (error0 == ICMP6_ERROR_NONE)
1702 /* validate advertised information */
1703 if ((h0->current_hop_limit && radv_info->curr_hop_limit)
1704 && (h0->current_hop_limit !=
1705 radv_info->curr_hop_limit))
1707 ip6_neighbor_syslog (vm, LOG_WARNING,
1708 "our AdvCurHopLimit on %U doesn't agree with %U",
1709 format_vnet_sw_if_index_name,
1716 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP)
1717 != radv_info->adv_managed_flag)
1719 ip6_neighbor_syslog (vm, LOG_WARNING,
1720 "our AdvManagedFlag on %U doesn't agree with %U",
1721 format_vnet_sw_if_index_name,
1728 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP)
1729 != radv_info->adv_other_flag)
1731 ip6_neighbor_syslog (vm, LOG_WARNING,
1732 "our AdvOtherConfigFlag on %U doesn't agree with %U",
1733 format_vnet_sw_if_index_name,
1740 time_in_msec_between_retransmitted_neighbor_solicitations
1742 adv_time_in_msec_between_retransmitted_neighbor_solicitations)
1744 time_in_msec_between_retransmitted_neighbor_solicitations
1746 clib_host_to_net_u32 (radv_info->
1747 adv_time_in_msec_between_retransmitted_neighbor_solicitations)))
1749 ip6_neighbor_syslog (vm, LOG_WARNING,
1750 "our AdvRetransTimer on %U doesn't agree with %U",
1751 format_vnet_sw_if_index_name,
1757 if ((h0->neighbor_reachable_time_in_msec &&
1758 radv_info->adv_neighbor_reachable_time_in_msec) &&
1759 (h0->neighbor_reachable_time_in_msec !=
1760 clib_host_to_net_u32
1761 (radv_info->adv_neighbor_reachable_time_in_msec)))
1763 ip6_neighbor_syslog (vm, LOG_WARNING,
1764 "our AdvReachableTime on %U doesn't agree with %U",
1765 format_vnet_sw_if_index_name,
1771 /* check for MTU or prefix options or .. */
1772 u8 *opt_hdr = (u8 *) (h0 + 1);
1773 while (options_len0 > 0)
1775 icmp6_neighbor_discovery_option_header_t *o0 =
1776 (icmp6_neighbor_discovery_option_header_t *)
1778 int opt_len = o0->n_data_u64s << 3;
1779 icmp6_neighbor_discovery_option_type_t option_type =
1782 if (options_len0 < 2)
1784 ip6_neighbor_syslog (vm, LOG_ERR,
1785 "malformed RA packet on %U from %U",
1786 format_vnet_sw_if_index_name,
1795 ip6_neighbor_syslog (vm, LOG_ERR,
1796 " zero length option in RA on %U from %U",
1797 format_vnet_sw_if_index_name,
1803 else if (opt_len > options_len0)
1805 ip6_neighbor_syslog (vm, LOG_ERR,
1806 "option length in RA packet greater than total length on %U from %U",
1807 format_vnet_sw_if_index_name,
1814 options_len0 -= opt_len;
1817 switch (option_type)
1819 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu:
1821 icmp6_neighbor_discovery_mtu_option_t *h =
1822 (icmp6_neighbor_discovery_mtu_option_t
1825 if (opt_len < sizeof (*h))
1828 if ((h->mtu && radv_info->adv_link_mtu) &&
1830 clib_host_to_net_u32
1831 (radv_info->adv_link_mtu)))
1833 ip6_neighbor_syslog (vm, LOG_WARNING,
1834 "our AdvLinkMTU on %U doesn't agree with %U",
1835 format_vnet_sw_if_index_name,
1843 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information:
1845 icmp6_neighbor_discovery_prefix_information_option_t
1847 (icmp6_neighbor_discovery_prefix_information_option_t
1850 /* validate advertised prefix options */
1851 ip6_radv_prefix_t *pr_info;
1852 u32 preferred, valid;
1854 if (opt_len < sizeof (*h))
1858 clib_net_to_host_u32 (h->preferred_time);
1859 valid = clib_net_to_host_u32 (h->valid_time);
1861 /* look for matching prefix - if we our advertising it, it better be consistant */
1863 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
1867 ip6_address_mask_from_width(&mask, pr_info->prefix_len);
1869 if(pr_info->enabled &&
1870 (pr_info->prefix_len == h->dst_address_length) &&
1871 ip6_address_is_equal_masked (&pr_info->prefix, &h->dst_address, &mask))
1874 if(!pr_info->decrement_lifetime_flag &&
1875 valid != pr_info->adv_valid_lifetime_in_secs)
1877 ip6_neighbor_syslog(vm, LOG_WARNING,
1878 "our ADV validlifetime on %U for %U does not agree with %U",
1879 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
1880 format_ip6_address, &h->dst_address);
1882 if(!pr_info->decrement_lifetime_flag &&
1883 preferred != pr_info->adv_pref_lifetime_in_secs)
1885 ip6_neighbor_syslog(vm, LOG_WARNING,
1886 "our ADV preferredlifetime on %U for %U does not agree with %U",
1887 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
1888 format_ip6_address, &h->dst_address);
1905 p0->error = error_node->errors[error0];
1907 if (error0 != ICMP6_ERROR_NONE)
1908 vlib_error_count (vm, error_node->node_index, error0, 1);
1910 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1911 to_next, n_left_to_next,
1915 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1918 /* Account for router advertisements sent. */
1919 vlib_error_count (vm, error_node->node_index,
1920 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_RX,
1921 n_advertisements_rcvd);
1923 return frame->n_vectors;
1926 /* create and initialize router advertisement parameters with default values for this intfc */
1928 ip6_neighbor_sw_interface_add_del (vnet_main_t * vnm,
1929 u32 sw_if_index, u32 is_add)
1931 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1934 vnet_sw_interface_t *sw_if0;
1935 ethernet_interface_t *eth_if0 = 0;
1937 /* lookup radv container - ethernet interfaces only */
1938 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
1939 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
1940 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1945 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
1947 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
1951 a = pool_elt_at_index (nm->if_radv_pool, ri);
1955 u32 i, *to_delete = 0;
1956 ip6_radv_prefix_t *p;
1957 ip6_mldp_group_t *m;
1959 /* release the lock on the interface's mcast adj */
1960 adj_unlock (a->mcast_adj_index);
1962 /* clean up prefix_pool */
1964 pool_foreach (p, a->adv_prefixes_pool,
1966 vec_add1 (to_delete, p - a->adv_prefixes_pool);
1970 for (i = 0; i < vec_len (to_delete); i++)
1972 p = pool_elt_at_index (a->adv_prefixes_pool, to_delete[i]);
1973 mhash_unset (&a->address_to_prefix_index, &p->prefix, 0);
1974 pool_put (a->adv_prefixes_pool, p);
1977 vec_free (to_delete);
1980 /* clean up mldp group pool */
1982 pool_foreach (m, a->mldp_group_pool,
1984 vec_add1 (to_delete, m - a->mldp_group_pool);
1988 for (i = 0; i < vec_len (to_delete); i++)
1990 m = pool_elt_at_index (a->mldp_group_pool, to_delete[i]);
1991 mhash_unset (&a->address_to_mldp_index, &m->mcast_address, 0);
1992 pool_put (a->mldp_group_pool, m);
1995 vec_free (to_delete);
1997 pool_put (nm->if_radv_pool, a);
1998 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ~0;
2006 vnet_hw_interface_t *hw_if0;
2008 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index);
2010 pool_get (nm->if_radv_pool, a);
2012 ri = a - nm->if_radv_pool;
2013 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ri;
2015 /* initialize default values (most of which are zero) */
2016 memset (a, 0, sizeof (a[0]));
2018 a->sw_if_index = sw_if_index;
2020 a->max_radv_interval = DEF_MAX_RADV_INTERVAL;
2021 a->min_radv_interval = DEF_MIN_RADV_INTERVAL;
2022 a->curr_hop_limit = DEF_CURR_HOP_LIMIT;
2023 a->adv_router_lifetime_in_sec = DEF_DEF_RTR_LIFETIME;
2025 a->adv_link_layer_address = 1; /* send ll address source address option */
2027 a->min_delay_between_radv = MIN_DELAY_BETWEEN_RAS;
2028 a->max_delay_between_radv = MAX_DELAY_BETWEEN_RAS;
2029 a->max_rtr_default_lifetime = MAX_DEF_RTR_LIFETIME;
2030 a->seed = (u32) clib_cpu_time_now ();
2031 (void) random_u32 (&a->seed);
2032 a->randomizer = clib_cpu_time_now ();
2033 (void) random_u64 (&a->randomizer);
2035 a->initial_adverts_count = MAX_INITIAL_RTR_ADVERTISEMENTS;
2036 a->initial_adverts_sent = a->initial_adverts_count - 1;
2037 a->initial_adverts_interval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
2039 /* deafult is to send */
2042 /* fill in radv_info for this interface that will be needed later */
2043 a->adv_link_mtu = hw_if0->max_l3_packet_bytes[VLIB_RX];
2045 clib_memcpy (a->link_layer_address, eth_if0->address, 6);
2047 /* fill in default link-local address (this may be overridden) */
2048 ip6_link_local_address_from_ethernet_address
2049 (&a->link_local_address, eth_if0->address);
2051 mhash_init (&a->address_to_prefix_index, sizeof (uword),
2052 sizeof (ip6_address_t));
2053 mhash_init (&a->address_to_mldp_index, sizeof (uword),
2054 sizeof (ip6_address_t));
2056 a->mcast_adj_index = adj_mcast_add_or_lock (FIB_PROTOCOL_IP6,
2060 /* add multicast groups we will always be reporting */
2062 ip6_mldp_group_t *mcast_group_info;
2064 ip6_set_reserved_multicast_address (&addr,
2065 IP6_MULTICAST_SCOPE_link_local,
2066 IP6_MULTICAST_GROUP_ID_all_hosts);
2068 /* lookup mldp info for this interface */
2070 uword *p = mhash_get (&a->address_to_mldp_index, &addr);
2072 p ? pool_elt_at_index (a->mldp_group_pool, p[0]) : 0;
2075 if (!mcast_group_info)
2079 pool_get (a->mldp_group_pool, mcast_group_info);
2081 mi = mcast_group_info - a->mldp_group_pool;
2082 mhash_set (&a->address_to_mldp_index, &addr, mi, /* old_value */
2085 mcast_group_info->type = 4;
2086 mcast_group_info->mcast_source_address_pool = 0;
2087 mcast_group_info->num_sources = 0;
2088 clib_memcpy (&mcast_group_info->mcast_address, &addr,
2089 sizeof (ip6_address_t));
2092 ip6_set_reserved_multicast_address (&addr,
2093 IP6_MULTICAST_SCOPE_link_local,
2094 IP6_MULTICAST_GROUP_ID_all_routers);
2096 p = mhash_get (&a->address_to_mldp_index, &addr);
2098 p ? pool_elt_at_index (a->mldp_group_pool, p[0]) : 0;
2100 if (!mcast_group_info)
2104 pool_get (a->mldp_group_pool, mcast_group_info);
2106 mi = mcast_group_info - a->mldp_group_pool;
2107 mhash_set (&a->address_to_mldp_index, &addr, mi, /* old_value */
2110 mcast_group_info->type = 4;
2111 mcast_group_info->mcast_source_address_pool = 0;
2112 mcast_group_info->num_sources = 0;
2113 clib_memcpy (&mcast_group_info->mcast_address, &addr,
2114 sizeof (ip6_address_t));
2117 ip6_set_reserved_multicast_address (&addr,
2118 IP6_MULTICAST_SCOPE_link_local,
2119 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2121 p = mhash_get (&a->address_to_mldp_index, &addr);
2123 p ? pool_elt_at_index (a->mldp_group_pool, p[0]) : 0;
2125 if (!mcast_group_info)
2129 pool_get (a->mldp_group_pool, mcast_group_info);
2131 mi = mcast_group_info - a->mldp_group_pool;
2132 mhash_set (&a->address_to_mldp_index, &addr, mi, /* old_value */
2135 mcast_group_info->type = 4;
2136 mcast_group_info->mcast_source_address_pool = 0;
2137 mcast_group_info->num_sources = 0;
2138 clib_memcpy (&mcast_group_info->mcast_address, &addr,
2139 sizeof (ip6_address_t));
2146 /* send an mldpv2 report */
2148 ip6_neighbor_send_mldpv2_report (u32 sw_if_index)
2150 vnet_main_t *vnm = vnet_get_main ();
2151 vlib_main_t *vm = vnm->vlib_main;
2152 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2153 vnet_sw_interface_t *sw_if0;
2154 ethernet_interface_t *eth_if0;
2158 ip6_radv_t *radv_info;
2168 icmp6_multicast_listener_report_header_t *rh0;
2169 icmp6_multicast_listener_report_packet_t *rp0;
2171 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2172 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
2173 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2175 if (!eth_if0 || !vnet_sw_interface_is_admin_up (vnm, sw_if_index))
2178 /* look up the radv_t information for this interface */
2179 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2182 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2187 /* send report now - build a mldpv2 report packet */
2188 n_allocated = vlib_buffer_alloc_from_free_list (vm,
2191 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2192 if (PREDICT_FALSE (n_allocated == 0))
2194 clib_warning ("buffer allocation failure");
2198 b0 = vlib_get_buffer (vm, bo0);
2200 /* adjust the sizeof the buffer to just include the ipv6 header */
2201 b0->current_length = sizeof (icmp6_multicast_listener_report_packet_t);
2203 payload_length = sizeof (icmp6_multicast_listener_report_header_t);
2205 b0->error = ICMP6_ERROR_NONE;
2207 rp0 = vlib_buffer_get_current (b0);
2208 ip0 = (ip6_header_t *) & rp0->ip;
2209 rh0 = (icmp6_multicast_listener_report_header_t *) & rp0->report_hdr;
2211 memset (rp0, 0x0, sizeof (icmp6_multicast_listener_report_packet_t));
2213 ip0->ip_version_traffic_class_and_flow_label =
2214 clib_host_to_net_u32 (0x6 << 28);
2216 ip0->protocol = IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS;
2217 /* for DEBUG - vnet driver won't seem to emit router alerts */
2218 /* ip0->protocol = IP_PROTOCOL_ICMP6; */
2221 rh0->icmp.type = ICMP6_multicast_listener_report_v2;
2223 /* source address MUST be the link-local address */
2224 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2225 ip0->src_address = radv_info->link_local_address;
2227 /* destination is all mldpv2 routers */
2228 ip6_set_reserved_multicast_address (&ip0->dst_address,
2229 IP6_MULTICAST_SCOPE_link_local,
2230 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2232 /* add reports here */
2233 ip6_mldp_group_t *m;
2234 int num_addr_records = 0;
2235 icmp6_multicast_address_record_t rr;
2237 /* fill in the hop-by-hop extension header (router alert) info */
2238 rh0->ext_hdr.next_hdr = IP_PROTOCOL_ICMP6;
2239 rh0->ext_hdr.n_data_u64s = 0;
2241 rh0->alert.type = IP6_MLDP_ALERT_TYPE;
2243 rh0->alert.value = 0;
2248 rh0->icmp.checksum = 0;
2251 pool_foreach (m, radv_info->mldp_group_pool,
2254 rr.aux_data_len_u32s = 0;
2255 rr.num_sources = clib_host_to_net_u16 (m->num_sources);
2256 clib_memcpy(&rr.mcast_addr, &m->mcast_address, sizeof(ip6_address_t));
2260 vlib_buffer_add_data
2261 (vm, b0->free_list_index, bo0,
2262 (void *)&rr, sizeof(icmp6_multicast_address_record_t));
2264 payload_length += sizeof( icmp6_multicast_address_record_t);
2269 rh0->num_addr_records = clib_host_to_net_u16 (num_addr_records);
2271 /* update lengths */
2272 ip0->payload_length = clib_host_to_net_u16 (payload_length);
2274 rh0->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0,
2276 ASSERT (bogus_length == 0);
2279 * OK to override w/ no regard for actual FIB, because
2280 * ip6-rewrite only looks at the adjacency.
2282 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
2283 vnet_main.local_interface_sw_if_index;
2285 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
2286 b0->flags |= VNET_BUFFER_LOCALLY_ORIGINATED;
2288 vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite-mcast");
2290 f = vlib_get_frame_to_node (vm, node->index);
2291 to_next = vlib_frame_vector_args (f);
2295 vlib_put_frame_to_node (vm, node->index, f);
2300 VLIB_REGISTER_NODE (ip6_icmp_router_solicitation_node,static) =
2302 .function = icmp6_router_solicitation,
2303 .name = "icmp6-router-solicitation",
2305 .vector_size = sizeof (u32),
2307 .format_trace = format_icmp6_input_trace,
2309 .n_next_nodes = ICMP6_ROUTER_SOLICITATION_N_NEXT,
2311 [ICMP6_ROUTER_SOLICITATION_NEXT_DROP] = "error-drop",
2312 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW] = "ip6-rewrite-mcast",
2313 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX] = "interface-output",
2318 /* send a RA or update the timer info etc.. */
2320 ip6_neighbor_process_timer_event (vlib_main_t * vm,
2321 vlib_node_runtime_t * node,
2322 vlib_frame_t * frame)
2324 vnet_main_t *vnm = vnet_get_main ();
2325 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2326 ip6_radv_t *radv_info;
2327 vlib_frame_t *f = 0;
2328 u32 n_this_frame = 0;
2329 u32 n_left_to_next = 0;
2332 icmp6_router_solicitation_header_t *h0;
2334 f64 now = vlib_time_now (vm);
2336 /* Interface ip6 radv info list */
2338 pool_foreach (radv_info, nm->if_radv_pool,
2340 if( !vnet_sw_interface_is_admin_up (vnm, radv_info->sw_if_index))
2342 radv_info->initial_adverts_sent = radv_info->initial_adverts_count-1;
2343 radv_info->next_multicast_time = now;
2344 radv_info->last_multicast_time = now;
2345 radv_info->last_radv_time = 0;
2346 radv_info->all_routers_mcast = 0;
2350 /* Make sure that we've joined the all-routers multicast group */
2351 if(!radv_info->all_routers_mcast)
2353 /* send MDLP_REPORT_EVENT message */
2354 ip6_neighbor_send_mldpv2_report(radv_info->sw_if_index);
2355 radv_info->all_routers_mcast = 1;
2358 /* is it time to send a multicast RA on this interface? */
2359 if(radv_info->send_radv && (now >= radv_info->next_multicast_time))
2364 f64 rfn = (radv_info->max_radv_interval - radv_info->min_radv_interval) *
2365 random_f64 (&radv_info->seed) + radv_info->min_radv_interval;
2367 /* multicast send - compute next multicast send time */
2368 if( radv_info->initial_adverts_sent > 0)
2370 radv_info->initial_adverts_sent--;
2371 if(rfn > radv_info-> initial_adverts_interval)
2372 rfn = radv_info-> initial_adverts_interval;
2374 /* check to see if we are ceasing to send */
2375 if( radv_info->initial_adverts_sent == 0)
2376 if(radv_info->cease_radv)
2377 radv_info->send_radv = 0;
2380 radv_info->next_multicast_time = rfn + now;
2381 radv_info->last_multicast_time = now;
2383 /* send advert now - build a "solicted" router advert with unspecified source address */
2384 n_allocated = vlib_buffer_alloc_from_free_list
2385 (vm, &bo0, n_to_alloc, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2387 if (PREDICT_FALSE(n_allocated == 0))
2389 clib_warning ("buffer allocation failure");
2392 b0 = vlib_get_buffer (vm, bo0);
2393 b0->current_length = sizeof( icmp6_router_solicitation_header_t);
2394 b0->error = ICMP6_ERROR_NONE;
2395 vnet_buffer (b0)->sw_if_index[VLIB_RX] = radv_info->sw_if_index;
2397 h0 = vlib_buffer_get_current (b0);
2399 memset (h0, 0, sizeof (icmp6_router_solicitation_header_t));
2401 h0->ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2402 h0->ip.payload_length = clib_host_to_net_u16 (sizeof (icmp6_router_solicitation_header_t)
2403 - STRUCT_OFFSET_OF (icmp6_router_solicitation_header_t, neighbor));
2404 h0->ip.protocol = IP_PROTOCOL_ICMP6;
2405 h0->ip.hop_limit = 255;
2407 /* set src/dst address as "unspecified" this marks this packet as internally generated rather than recieved */
2408 h0->ip.src_address.as_u64[0] = 0;
2409 h0->ip.src_address.as_u64[1] = 0;
2411 h0->ip.dst_address.as_u64[0] = 0;
2412 h0->ip.dst_address.as_u64[1] = 0;
2414 h0->neighbor.icmp.type = ICMP6_router_solicitation;
2416 if (PREDICT_FALSE(f == 0))
2418 f = vlib_get_frame_to_node (vm, ip6_icmp_router_solicitation_node.index);
2419 to_next = vlib_frame_vector_args (f);
2420 n_left_to_next = VLIB_FRAME_SIZE;
2429 if (PREDICT_FALSE(n_left_to_next == 0))
2431 f->n_vectors = n_this_frame;
2432 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2441 ASSERT (n_this_frame);
2442 f->n_vectors = n_this_frame;
2443 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2449 ip6_icmp_neighbor_discovery_event_process (vlib_main_t * vm,
2450 vlib_node_runtime_t * node,
2451 vlib_frame_t * frame)
2454 ip6_icmp_neighbor_discovery_event_data_t *event_data;
2456 /* init code here */
2460 vlib_process_wait_for_event_or_clock (vm, 1. /* seconds */ );
2462 event_data = vlib_process_get_event_data (vm, &event_type);
2466 /* No events found: timer expired. */
2467 /* process interface list and send RAs as appropriate, update timer info */
2468 ip6_neighbor_process_timer_event (vm, node, frame);
2475 case ICMP6_ND_EVENT_INIT:
2486 _vec_len (event_data) = 0;
2489 return frame->n_vectors;
2493 VLIB_REGISTER_NODE (ip6_icmp_router_advertisement_node,static) =
2495 .function = icmp6_router_advertisement,
2496 .name = "icmp6-router-advertisement",
2498 .vector_size = sizeof (u32),
2500 .format_trace = format_icmp6_input_trace,
2509 vlib_node_registration_t ip6_icmp_neighbor_discovery_event_node = {
2511 .function = ip6_icmp_neighbor_discovery_event_process,
2512 .name = "ip6-icmp-neighbor-discovery-event-process",
2513 .type = VLIB_NODE_TYPE_PROCESS,
2517 icmp6_neighbor_solicitation (vlib_main_t * vm,
2518 vlib_node_runtime_t * node, vlib_frame_t * frame)
2520 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
2521 /* is_solicitation */
2526 icmp6_neighbor_advertisement (vlib_main_t * vm,
2527 vlib_node_runtime_t * node,
2528 vlib_frame_t * frame)
2530 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
2531 /* is_solicitation */
2536 VLIB_REGISTER_NODE (ip6_icmp_neighbor_solicitation_node,static) =
2538 .function = icmp6_neighbor_solicitation,
2539 .name = "icmp6-neighbor-solicitation",
2541 .vector_size = sizeof (u32),
2543 .format_trace = format_icmp6_input_trace,
2545 .n_next_nodes = ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
2547 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP] = "error-drop",
2548 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY] = "interface-output",
2554 VLIB_REGISTER_NODE (ip6_icmp_neighbor_advertisement_node,static) =
2556 .function = icmp6_neighbor_advertisement,
2557 .name = "icmp6-neighbor-advertisement",
2559 .vector_size = sizeof (u32),
2561 .format_trace = format_icmp6_input_trace,
2570 /* API support functions */
2572 ip6_neighbor_ra_config (vlib_main_t * vm, u32 sw_if_index,
2573 u8 suppress, u8 managed, u8 other,
2574 u8 ll_option, u8 send_unicast, u8 cease,
2575 u8 use_lifetime, u32 lifetime,
2576 u32 initial_count, u32 initial_interval,
2577 u32 max_interval, u32 min_interval, u8 is_no)
2579 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2583 /* look up the radv_t information for this interface */
2584 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2586 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2587 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
2592 ip6_radv_t *radv_info;
2593 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2595 if ((max_interval != 0) && (min_interval == 0))
2596 min_interval = .75 * max_interval;
2600 0) ? ((is_no) ? DEF_MAX_RADV_INTERVAL : max_interval) :
2601 radv_info->max_radv_interval;
2604 0) ? ((is_no) ? DEF_MIN_RADV_INTERVAL : min_interval) :
2605 radv_info->min_radv_interval;
2608 0) ? ((is_no) ? DEF_DEF_RTR_LIFETIME : lifetime) :
2609 radv_info->adv_router_lifetime_in_sec;
2613 if (lifetime > MAX_DEF_RTR_LIFETIME)
2614 lifetime = MAX_DEF_RTR_LIFETIME;
2616 if (lifetime <= max_interval)
2617 return VNET_API_ERROR_INVALID_VALUE;
2620 if (min_interval != 0)
2622 if ((min_interval > .75 * max_interval) || (min_interval < 3))
2623 return VNET_API_ERROR_INVALID_VALUE;
2626 if ((initial_count > MAX_INITIAL_RTR_ADVERTISEMENTS) ||
2627 (initial_interval > MAX_INITIAL_RTR_ADVERT_INTERVAL))
2628 return VNET_API_ERROR_INVALID_VALUE;
2631 if "flag" is set and is_no is true then restore default value else set value corresponding to "flag"
2632 if "flag" is clear don't change corresponding value
2634 radv_info->send_radv =
2635 (suppress != 0) ? ((is_no != 0) ? 1 : 0) : radv_info->send_radv;
2636 radv_info->adv_managed_flag =
2637 (managed != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_managed_flag;
2638 radv_info->adv_other_flag =
2639 (other != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_other_flag;
2640 radv_info->adv_link_layer_address =
2642 0) ? ((is_no) ? 1 : 0) : radv_info->adv_link_layer_address;
2643 radv_info->send_unicast =
2644 (send_unicast != 0) ? ((is_no) ? 0 : 1) : radv_info->send_unicast;
2645 radv_info->cease_radv =
2646 (cease != 0) ? ((is_no) ? 0 : 1) : radv_info->cease_radv;
2648 radv_info->min_radv_interval = min_interval;
2649 radv_info->max_radv_interval = max_interval;
2650 radv_info->adv_router_lifetime_in_sec = lifetime;
2652 radv_info->initial_adverts_count =
2654 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERTISEMENTS : initial_count) :
2655 radv_info->initial_adverts_count;
2656 radv_info->initial_adverts_interval =
2657 (initial_interval !=
2658 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERT_INTERVAL : initial_interval) :
2659 radv_info->initial_adverts_interval;
2662 if ((cease != 0) && (is_no))
2663 radv_info->send_radv = 1;
2665 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
2666 radv_info->next_multicast_time = vlib_time_now (vm);
2667 radv_info->last_multicast_time = vlib_time_now (vm);
2668 radv_info->last_radv_time = 0;
2674 ip6_neighbor_ra_prefix (vlib_main_t * vm, u32 sw_if_index,
2675 ip6_address_t * prefix_addr, u8 prefix_len,
2676 u8 use_default, u32 val_lifetime, u32 pref_lifetime,
2677 u8 no_advertise, u8 off_link, u8 no_autoconfig,
2678 u8 no_onlink, u8 is_no)
2680 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2685 /* look up the radv_t information for this interface */
2686 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2689 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2691 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
2695 f64 now = vlib_time_now (vm);
2696 ip6_radv_t *radv_info;
2697 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2699 /* prefix info add, delete or update */
2700 ip6_radv_prefix_t *prefix;
2702 /* lookup prefix info for this address on this interface */
2703 uword *p = mhash_get (&radv_info->address_to_prefix_index, prefix_addr);
2705 prefix = p ? pool_elt_at_index (radv_info->adv_prefixes_pool, p[0]) : 0;
2711 return VNET_API_ERROR_INVALID_VALUE; /* invalid prefix */
2713 if (prefix->prefix_len != prefix_len)
2714 return VNET_API_ERROR_INVALID_VALUE_2;
2716 /* FIXME - Should the DP do this or the CP ? */
2717 /* do specific delete processing here before returning */
2718 /* try to remove from routing table */
2720 mhash_unset (&radv_info->address_to_prefix_index, prefix_addr,
2722 pool_put (radv_info->adv_prefixes_pool, prefix);
2724 radv_info->initial_adverts_sent =
2725 radv_info->initial_adverts_count - 1;
2726 radv_info->next_multicast_time = vlib_time_now (vm);
2727 radv_info->last_multicast_time = vlib_time_now (vm);
2728 radv_info->last_radv_time = 0;
2732 /* adding or changing */
2737 pool_get (radv_info->adv_prefixes_pool, prefix);
2738 pi = prefix - radv_info->adv_prefixes_pool;
2739 mhash_set (&radv_info->address_to_prefix_index, prefix_addr, pi,
2742 memset (prefix, 0x0, sizeof (ip6_radv_prefix_t));
2744 prefix->prefix_len = prefix_len;
2745 clib_memcpy (&prefix->prefix, prefix_addr, sizeof (ip6_address_t));
2747 /* initialize default values */
2748 prefix->adv_on_link_flag = 1; /* L bit set */
2749 prefix->adv_autonomous_flag = 1; /* A bit set */
2750 prefix->adv_valid_lifetime_in_secs = DEF_ADV_VALID_LIFETIME;
2751 prefix->adv_pref_lifetime_in_secs = DEF_ADV_PREF_LIFETIME;
2752 prefix->enabled = 1;
2753 prefix->decrement_lifetime_flag = 1;
2754 prefix->deprecated_prefix_flag = 1;
2758 /* FIXME - Should the DP do this or the CP ? */
2759 /* insert prefix into routing table as a connected prefix */
2768 if (prefix->prefix_len != prefix_len)
2769 return VNET_API_ERROR_INVALID_VALUE_2;
2773 /* FIXME - Should the DP do this or the CP ? */
2774 /* remove from routing table if already there */
2778 if ((val_lifetime == ~0) || (pref_lifetime == ~0))
2780 prefix->adv_valid_lifetime_in_secs = ~0;
2781 prefix->adv_pref_lifetime_in_secs = ~0;
2782 prefix->decrement_lifetime_flag = 0;
2786 prefix->adv_valid_lifetime_in_secs = val_lifetime;;
2787 prefix->adv_pref_lifetime_in_secs = pref_lifetime;
2790 /* copy remaining */
2791 prefix->enabled = !(no_advertise != 0);
2792 prefix->adv_on_link_flag = !((off_link != 0) || (no_onlink != 0));
2793 prefix->adv_autonomous_flag = !(no_autoconfig != 0);
2797 /* fill in the expiration times */
2798 prefix->valid_lifetime_expires =
2799 now + prefix->adv_valid_lifetime_in_secs;
2800 prefix->pref_lifetime_expires = now + prefix->adv_pref_lifetime_in_secs;
2802 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
2803 radv_info->next_multicast_time = vlib_time_now (vm);
2804 radv_info->last_multicast_time = vlib_time_now (vm);
2805 radv_info->last_radv_time = 0;
2811 ip6_neighbor_cmd (vlib_main_t * vm, unformat_input_t * main_input,
2812 vlib_cli_command_t * cmd)
2814 vnet_main_t *vnm = vnet_get_main ();
2815 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2816 clib_error_t *error = 0;
2818 u8 suppress = 0, managed = 0, other = 0;
2819 u8 suppress_ll_option = 0, send_unicast = 0, cease = 0;
2820 u8 use_lifetime = 0;
2821 u32 sw_if_index, ra_lifetime = 0, ra_initial_count =
2822 0, ra_initial_interval = 0;
2823 u32 ra_max_interval = 0, ra_min_interval = 0;
2825 unformat_input_t _line_input, *line_input = &_line_input;
2826 vnet_sw_interface_t *sw_if0;
2828 int add_radv_info = 1;
2829 __attribute__ ((unused)) ip6_radv_t *radv_info = 0;
2830 ip6_address_t ip6_addr;
2834 /* Get a line of input. */
2835 if (!unformat_user (main_input, unformat_line_input, line_input))
2838 /* get basic radv info for this interface */
2839 if (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2842 if (unformat_user (line_input,
2843 unformat_vnet_sw_interface, vnm, &sw_if_index))
2846 ethernet_interface_t *eth_if0 = 0;
2848 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2849 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2851 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2856 clib_error_return (0, "Interface must be of ethernet type");
2860 /* look up the radv_t information for this interface */
2861 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
2864 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2868 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2872 error = clib_error_return (0, "unknown interface %U'",
2873 format_unformat_error, line_input);
2879 error = clib_error_return (0, "invalid interface name %U'",
2880 format_unformat_error, line_input);
2885 /* get the rest of the command */
2886 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2888 if (unformat (line_input, "no"))
2890 else if (unformat (line_input, "prefix %U/%d",
2891 unformat_ip6_address, &ip6_addr, &addr_len))
2896 else if (unformat (line_input, "ra-managed-config-flag"))
2901 else if (unformat (line_input, "ra-other-config-flag"))
2906 else if (unformat (line_input, "ra-suppress") ||
2907 unformat (line_input, "ra-surpress"))
2912 else if (unformat (line_input, "ra-suppress-link-layer") ||
2913 unformat (line_input, "ra-surpress-link-layer"))
2915 suppress_ll_option = 1;
2918 else if (unformat (line_input, "ra-send-unicast"))
2923 else if (unformat (line_input, "ra-lifetime"))
2925 if (!unformat (line_input, "%d", &ra_lifetime))
2927 error = unformat_parse_error (line_input);
2933 else if (unformat (line_input, "ra-initial"))
2936 (line_input, "%d %d", &ra_initial_count, &ra_initial_interval))
2938 error = unformat_parse_error (line_input);
2943 else if (unformat (line_input, "ra-interval"))
2945 if (!unformat (line_input, "%d", &ra_max_interval))
2947 error = unformat_parse_error (line_input);
2951 if (!unformat (line_input, "%d", &ra_min_interval))
2952 ra_min_interval = 0;
2955 else if (unformat (line_input, "ra-cease"))
2962 error = unformat_parse_error (line_input);
2969 ip6_neighbor_ra_config (vm, sw_if_index,
2970 suppress, managed, other,
2971 suppress_ll_option, send_unicast, cease,
2972 use_lifetime, ra_lifetime,
2973 ra_initial_count, ra_initial_interval,
2974 ra_max_interval, ra_min_interval, is_no);
2978 u32 valid_lifetime_in_secs = 0;
2979 u32 pref_lifetime_in_secs = 0;
2980 u8 use_prefix_default_values = 0;
2981 u8 no_advertise = 0;
2983 u8 no_autoconfig = 0;
2986 /* get the rest of the command */
2987 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2989 if (unformat (line_input, "default"))
2991 use_prefix_default_values = 1;
2994 else if (unformat (line_input, "infinite"))
2996 valid_lifetime_in_secs = ~0;
2997 pref_lifetime_in_secs = ~0;
3000 else if (unformat (line_input, "%d %d", &valid_lifetime_in_secs,
3001 &pref_lifetime_in_secs))
3008 /* get the rest of the command */
3009 while (!use_prefix_default_values &&
3010 unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3012 if (unformat (line_input, "no-advertise"))
3014 else if (unformat (line_input, "off-link"))
3016 else if (unformat (line_input, "no-autoconfig"))
3018 else if (unformat (line_input, "no-onlink"))
3022 error = unformat_parse_error (line_input);
3027 ip6_neighbor_ra_prefix (vm, sw_if_index,
3028 &ip6_addr, addr_len,
3029 use_prefix_default_values,
3030 valid_lifetime_in_secs,
3031 pref_lifetime_in_secs,
3033 off_link, no_autoconfig, no_onlink, is_no);
3037 unformat_free (line_input);
3043 ip6_print_addrs (vlib_main_t * vm, u32 * addrs)
3045 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3048 for (i = 0; i < vec_len (addrs); i++)
3050 ip_interface_address_t *a =
3051 pool_elt_at_index (lm->if_address_pool, addrs[i]);
3052 ip6_address_t *address = ip_interface_address_get_address (lm, a);
3054 vlib_cli_output (vm, "\t\t%U/%d",
3055 format_ip6_address, address, a->address_length);
3059 static clib_error_t *
3060 show_ip6_interface_cmd (vlib_main_t * vm,
3061 unformat_input_t * input, vlib_cli_command_t * cmd)
3063 vnet_main_t *vnm = vnet_get_main ();
3064 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3065 clib_error_t *error = 0;
3070 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3074 /* look up the radv_t information for this interface */
3075 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3078 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3082 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3083 ip6_radv_t *radv_info;
3084 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3086 vlib_cli_output (vm, "%U is admin %s\n",
3087 format_vnet_sw_interface_name, vnm,
3088 vnet_get_sw_interface (vnm, sw_if_index),
3089 (vnet_sw_interface_is_admin_up (vnm, sw_if_index) ?
3093 u32 *link_scope = 0, *global_scope = 0;
3094 u32 *local_scope = 0, *unknown_scope = 0;
3095 ip_interface_address_t *a;
3097 vec_validate_init_empty (lm->if_address_pool_index_by_sw_if_index,
3099 ai = lm->if_address_pool_index_by_sw_if_index[sw_if_index];
3101 while (ai != (u32) ~ 0)
3103 a = pool_elt_at_index (lm->if_address_pool, ai);
3104 ip6_address_t *address =
3105 ip_interface_address_get_address (lm, a);
3107 if (ip6_address_is_link_local_unicast (address))
3108 vec_add1 (link_scope, ai);
3109 else if (ip6_address_is_global_unicast (address))
3110 vec_add1 (global_scope, ai);
3111 else if (ip6_address_is_local_unicast (address))
3112 vec_add1 (local_scope, ai);
3114 vec_add1 (unknown_scope, ai);
3116 ai = a->next_this_sw_interface;
3119 if (vec_len (link_scope))
3121 vlib_cli_output (vm, "\tLink-local address(es):\n");
3122 ip6_print_addrs (vm, link_scope);
3123 vec_free (link_scope);
3126 if (vec_len (local_scope))
3128 vlib_cli_output (vm, "\tLocal unicast address(es):\n");
3129 ip6_print_addrs (vm, local_scope);
3130 vec_free (local_scope);
3133 if (vec_len (global_scope))
3135 vlib_cli_output (vm, "\tGlobal unicast address(es):\n");
3136 ip6_print_addrs (vm, global_scope);
3137 vec_free (global_scope);
3140 if (vec_len (unknown_scope))
3142 vlib_cli_output (vm, "\tOther-scope address(es):\n");
3143 ip6_print_addrs (vm, unknown_scope);
3144 vec_free (unknown_scope);
3147 vlib_cli_output (vm, "\tJoined group address(es):\n");
3148 ip6_mldp_group_t *m;
3150 pool_foreach (m, radv_info->mldp_group_pool,
3152 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
3157 vlib_cli_output (vm, "\tAdvertised Prefixes:\n");
3158 ip6_radv_prefix_t *p;
3160 pool_foreach (p, radv_info->adv_prefixes_pool,
3162 vlib_cli_output (vm, "\t\tprefix %U, length %d\n",
3163 format_ip6_address, &p->prefix, p->prefix_len);
3167 vlib_cli_output (vm, "\tMTU is %d\n", radv_info->adv_link_mtu);
3168 vlib_cli_output (vm, "\tICMP error messages are unlimited\n");
3169 vlib_cli_output (vm, "\tICMP redirects are disabled\n");
3170 vlib_cli_output (vm, "\tICMP unreachables are not sent\n");
3171 vlib_cli_output (vm, "\tND DAD is disabled\n");
3172 //vlib_cli_output (vm, "\tND reachable time is %d milliseconds\n",);
3173 vlib_cli_output (vm, "\tND advertised reachable time is %d\n",
3174 radv_info->adv_neighbor_reachable_time_in_msec);
3175 vlib_cli_output (vm,
3176 "\tND advertised retransmit interval is %d (msec)\n",
3178 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
3180 u32 ra_interval = radv_info->max_radv_interval;
3181 u32 ra_interval_min = radv_info->min_radv_interval;
3182 vlib_cli_output (vm,
3183 "\tND router advertisements are sent every %d seconds (min interval is %d)\n",
3184 ra_interval, ra_interval_min);
3185 vlib_cli_output (vm,
3186 "\tND router advertisements live for %d seconds\n",
3187 radv_info->adv_router_lifetime_in_sec);
3188 vlib_cli_output (vm,
3189 "\tHosts %s stateless autoconfig for addresses\n",
3190 (radv_info->adv_managed_flag) ? "use" :
3192 vlib_cli_output (vm, "\tND router advertisements sent %d\n",
3193 radv_info->n_advertisements_sent);
3194 vlib_cli_output (vm, "\tND router solicitations received %d\n",
3195 radv_info->n_solicitations_rcvd);
3196 vlib_cli_output (vm, "\tND router solicitations dropped %d\n",
3197 radv_info->n_solicitations_dropped);
3201 error = clib_error_return (0, "IPv6 not enabled on interface",
3202 format_unformat_error, input);
3210 * This command is used to display various IPv6 attributes on a given
3214 * Example of how to display IPv6 settings:
3215 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
3216 * GigabitEthernet2/0/0 is admin up
3217 * Link-local address(es):
3219 * Joined group address(es):
3224 * Advertised Prefixes:
3225 * prefix fe80::fe:28ff:fe9c:75b3, length 64
3227 * ICMP error messages are unlimited
3228 * ICMP redirects are disabled
3229 * ICMP unreachables are not sent
3230 * ND DAD is disabled
3231 * ND advertised reachable time is 0
3232 * ND advertised retransmit interval is 0 (msec)
3233 * ND router advertisements are sent every 200 seconds (min interval is 150)
3234 * ND router advertisements live for 600 seconds
3235 * Hosts use stateless autoconfig for addresses
3236 * ND router advertisements sent 19336
3237 * ND router solicitations received 0
3238 * ND router solicitations dropped 0
3240 * Example of output if IPv6 is not enabled on the interface:
3241 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
3242 * show ip6 interface: IPv6 not enabled on interface
3246 VLIB_CLI_COMMAND (show_ip6_interface_command, static) =
3248 .path = "show ip6 interface",
3249 .function = show_ip6_interface_cmd,
3250 .short_help = "show ip6 interface <interface>",
3255 disable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
3257 clib_error_t *error = 0;
3258 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3261 /* look up the radv_t information for this interface */
3262 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3264 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3266 /* if not created - do nothing */
3269 vnet_main_t *vnm = vnet_get_main ();
3270 ip6_radv_t *radv_info;
3272 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3274 /* check radv_info ref count for other ip6 addresses on this interface */
3275 /* This implicitly excludes the link local address */
3276 if (radv_info->ref_count == 0)
3278 /* essentially "disables" ipv6 on this interface */
3279 error = ip6_add_del_interface_address (vm, sw_if_index,
3281 link_local_address, 128,
3284 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index,
3292 ip6_interface_enabled (vlib_main_t * vm, u32 sw_if_index)
3294 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3297 /* look up the radv_t information for this interface */
3298 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3301 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3307 enable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
3309 clib_error_t *error = 0;
3310 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3314 /* look up the radv_t information for this interface */
3315 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3318 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3320 /* if not created yet */
3323 vnet_main_t *vnm = vnet_get_main ();
3324 vnet_sw_interface_t *sw_if0;
3326 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
3327 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
3329 ethernet_interface_t *eth_if0;
3332 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
3335 /* create radv_info. for this interface. This holds all the info needed for router adverts */
3337 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, is_add);
3341 ip6_radv_t *radv_info;
3342 ip6_address_t link_local_address;
3344 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3346 ip6_link_local_address_from_ethernet_mac_address
3347 (&link_local_address, eth_if0->address);
3349 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index);
3350 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_SUB)
3352 /* make up an interface id */
3356 link_local_address.as_u64[0] = radv_info->randomizer;
3359 md5_add (&m, &link_local_address, 16);
3360 md5_finish (&m, digest);
3362 clib_memcpy (&link_local_address, digest, 16);
3364 radv_info->randomizer = link_local_address.as_u64[0];
3366 link_local_address.as_u64[0] =
3367 clib_host_to_net_u64 (0xFE80000000000000ULL);
3369 link_local_address.as_u8[8] &= 0xfd;
3372 /* essentially "enables" ipv6 on this interface */
3373 error = ip6_add_del_interface_address (vm, sw_if_index,
3374 &link_local_address,
3376 /* address width */ ,
3380 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index,
3384 radv_info->link_local_address = link_local_address;
3393 static clib_error_t *
3394 enable_ip6_interface_cmd (vlib_main_t * vm,
3395 unformat_input_t * input, vlib_cli_command_t * cmd)
3397 vnet_main_t *vnm = vnet_get_main ();
3398 clib_error_t *error = 0;
3403 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3405 enable_ip6_interface (vm, sw_if_index);
3409 error = clib_error_return (0, "unknown interface\n'",
3410 format_unformat_error, input);
3417 * This command is used to enable IPv6 on a given interface.
3420 * Example of how enable IPv6 on a given interface:
3421 * @cliexcmd{enable ip6 interface GigabitEthernet2/0/0}
3424 VLIB_CLI_COMMAND (enable_ip6_interface_command, static) =
3426 .path = "enable ip6 interface",
3427 .function = enable_ip6_interface_cmd,
3428 .short_help = "enable ip6 interface <interface>",
3432 static clib_error_t *
3433 disable_ip6_interface_cmd (vlib_main_t * vm,
3434 unformat_input_t * input, vlib_cli_command_t * cmd)
3436 vnet_main_t *vnm = vnet_get_main ();
3437 clib_error_t *error = 0;
3442 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3444 error = disable_ip6_interface (vm, sw_if_index);
3448 error = clib_error_return (0, "unknown interface\n'",
3449 format_unformat_error, input);
3456 * This command is used to disable IPv6 on a given interface.
3459 * Example of how disable IPv6 on a given interface:
3460 * @cliexcmd{disable ip6 interface GigabitEthernet2/0/0}
3463 VLIB_CLI_COMMAND (disable_ip6_interface_command, static) =
3465 .path = "disable ip6 interface",
3466 .function = disable_ip6_interface_cmd,
3467 .short_help = "disable ip6 interface <interface>",
3472 * This command is used to configure the neighbor discovery
3473 * parameters on a given interface. Use the '<em>show ip6 interface</em>'
3474 * command to display some of the current neighbor discovery parameters
3475 * on a given interface. This command has three formats:
3478 * <b>Format 1 - Router Advertisement Options:</b> (Only one can be entered in a single command)
3480 * '<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>'
3484 * <em>[no] ra-managed-config-flag</em> - Advertises in ICMPv6
3485 * router-advertisement messages to use stateful address
3486 * auto-configuration to obtain address information (sets the M-bit).
3487 * Default is the M-bit is not set and the '<em>no</em>' option
3488 * returns it to this default state.
3490 * <em>[no] ra-other-config-flag</em> - Indicates in ICMPv6
3491 * router-advertisement messages that hosts use stateful auto
3492 * configuration to obtain nonaddress related information (sets
3493 * the O-bit). Default is the O-bit is not set and the '<em>no</em>'
3494 * option returns it to this default state.
3496 * <em>[no] ra-suppress</em> - Disables sending ICMPv6 router-advertisement
3497 * messages. The '<em>no</em>' option implies to enable sending ICMPv6
3498 * router-advertisement messages.
3500 * <em>[no] ra-suppress-link-layer</em> - Indicates not to include the
3501 * optional source link-layer address in the ICMPv6 router-advertisement
3502 * messages. Default is to include the optional source link-layer address
3503 * and the '<em>no</em>' option returns it to this default state.
3505 * <em>[no] ra-send-unicast</em> - Use the source address of the
3506 * router-solicitation message if availiable. The default is to use
3507 * multicast address of all nodes, and the '<em>no</em>' option returns
3508 * it to this default state.
3510 * <em>[no] ra-lifetime <lifetime></em> - Advertises the lifetime of a
3511 * default router in ICMPv6 router-advertisement messages. The range is
3512 * from 0 to 9000 seconds. '<em><lifetime></em>' must be greater than
3513 * '<em><max-interval></em>'. The default value is 600 seconds and the
3514 * '<em>no</em>' option returns it to this default value.
3516 * <em>[no] ra-initial <cnt> <interval></em> - Number of initial ICMPv6
3517 * router-advertisement messages sent and the interval between each
3518 * message. Range for count is 1 - 3 and default is 3. Range for interval
3519 * is 1 to 16 seconds, and default is 16 seconds. The '<em>no</em>' option
3520 * returns both to their default value.
3522 * <em>[no] ra-interval <max-interval> [<min-interval>]</em> - Configures the
3523 * interval between sending ICMPv6 router-advertisement messages. The
3524 * range for max-interval is from 4 to 200 seconds. min-interval can not
3525 * be more than 75% of max-interval. If not set, min-interval will be
3526 * set to 75% of max-interval. The range for min-interval is from 3 to
3527 * 150 seconds. The '<em>no</em>' option returns both to their default
3530 * <em>[no] ra-cease</em> - Cease sending ICMPv6 router-advertisement messages.
3531 * The '<em>no</em>' options implies to start (or restart) sending
3532 * ICMPv6 router-advertisement messages.
3535 * <b>Format 2 - Prefix Options:</b>
3537 * '<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>'
3541 * <em>no</em> - All additional flags are ignored and the prefix is deleted.
3543 * <em><valid-lifetime> <pref-lifetime></em> - '<em><valid-lifetime></em>' is the
3544 * length of time in seconds during what the prefix is valid for the purpose of
3545 * on-link determination. Range is 7203 to 2592000 seconds and default is 2592000
3546 * seconds (30 days). '<em><pref-lifetime></em>' is the prefered-lifetime and is the
3547 * length of time in seconds during what addresses generated from the prefix remain
3548 * preferred. Range is 0 to 604800 seconds and default is 604800 seconds (7 days).
3550 * <em>infinite</em> - Both '<em><valid-lifetime></em>' and '<em><<pref-lifetime></em>'
3551 * are inifinte, no timeout.
3553 * <em>no-advertise</em> - Do not send full router address in prefix
3554 * advertisement. Default is to advertise (i.e. - This flag is off by default).
3556 * <em>off-link</em> - Prefix is off-link, clear L-bit in packet. Default is on-link
3557 * (i.e. - This flag is off and L-bit in packet is set by default and this prefix can
3558 * be used for on-link determination). '<em>no-onlink</em>' also controls the L-bit.
3560 * <em>no-autoconfig</em> - Do not use prefix for autoconfiguration, clear A-bit in packet.
3561 * Default is autoconfig (i.e. - This flag is off and A-bit in packet is set by default.
3563 * <em>no-onlink</em> - Do not use prefix for onlink determination, clear L-bit in packet.
3564 * Default is on-link (i.e. - This flag is off and L-bit in packet is set by default and
3565 * this prefix can be used for on-link determination). '<em>off-link</em>' also controls
3569 * <b>Format 3: - Default of Prefix:</b>
3571 * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> default</b></em>'
3573 * When a new prefix is added (or existing one is being overwritten) <em>default</em>
3574 * uses default values for the prefix. If <em>no</em> is used, the <em>default</em>
3575 * is ignored and the prefix is deleted.
3579 * Example of how set a router advertisement option:
3580 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 ra-interval 100 20}
3581 * Example of how to add a prefix:
3582 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 prefix fe80::fe:28ff:fe9c:75b3/64 infinite no-advertise}
3583 * Example of how to delete a prefix:
3584 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 no prefix fe80::fe:28ff:fe9c:75b3/64}
3587 VLIB_CLI_COMMAND (ip6_nd_command, static) =
3590 .short_help = "ip6 nd <interface> ...",
3591 .function = ip6_neighbor_cmd,
3596 set_ip6_link_local_address (vlib_main_t * vm,
3597 u32 sw_if_index, ip6_address_t * address)
3599 clib_error_t *error = 0;
3600 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3602 ip6_radv_t *radv_info;
3603 vnet_main_t *vnm = vnet_get_main ();
3605 if (!ip6_address_is_link_local_unicast (address))
3607 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_LINK_LOCAL;
3608 return (error = clib_error_return (0, "address not link-local",
3609 format_unformat_error));
3612 /* call enable ipv6 */
3613 enable_ip6_interface (vm, sw_if_index);
3615 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3619 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3621 /* save if link local address (overwrite default) */
3623 /* delete the old one */
3624 error = ip6_add_del_interface_address (vm, sw_if_index,
3625 &radv_info->link_local_address,
3626 128, 1 /* is_del */ );
3630 /* add the new one */
3631 error = ip6_add_del_interface_address (vm, sw_if_index,
3637 radv_info->link_local_address = *address;
3643 vnm->api_errno = VNET_API_ERROR_IP6_NOT_ENABLED;
3644 error = clib_error_return (0, "ip6 not enabled for interface",
3645 format_unformat_error);
3651 set_ip6_link_local_address_cmd (vlib_main_t * vm,
3652 unformat_input_t * input,
3653 vlib_cli_command_t * cmd)
3655 vnet_main_t *vnm = vnet_get_main ();
3656 clib_error_t *error = 0;
3658 ip6_address_t ip6_addr;
3660 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3662 /* get the rest of the command */
3663 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3665 if (unformat (input, "%U", unformat_ip6_address, &ip6_addr))
3668 return (unformat_parse_error (input));
3671 error = set_ip6_link_local_address (vm, sw_if_index, &ip6_addr);
3676 * This command is used to assign an IPv6 Link-local address to an
3677 * interface. This command will enable IPv6 on an interface if it
3678 * is not already enabled. Use the '<em>show ip6 interface</em>' command
3679 * to display the assigned Link-local address.
3682 * Example of how to assign an IPv6 Link-local address to an interface:
3683 * @cliexcmd{set ip6 link-local address GigabitEthernet2/0/0 FE80::AB8}
3686 VLIB_CLI_COMMAND (set_ip6_link_local_address_command, static) =
3688 .path = "set ip6 link-local address",
3689 .short_help = "set ip6 link-local address <interface> <ip6-address>",
3690 .function = set_ip6_link_local_address_cmd,
3694 /* callback when an interface address is added or deleted */
3696 ip6_neighbor_add_del_interface_address (ip6_main_t * im,
3699 ip6_address_t * address,
3701 u32 if_address_index, u32 is_delete)
3703 vnet_main_t *vnm = vnet_get_main ();
3704 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3706 vlib_main_t *vm = vnm->vlib_main;
3707 ip6_radv_t *radv_info;
3709 ip6_mldp_group_t *mcast_group_info;
3711 /* create solicited node multicast address for this interface adddress */
3712 ip6_set_solicited_node_multicast_address (&a, 0);
3714 a.as_u8[0xd] = address->as_u8[0xd];
3715 a.as_u8[0xe] = address->as_u8[0xe];
3716 a.as_u8[0xf] = address->as_u8[0xf];
3720 /* try to create radv_info - does nothing if ipv6 already enabled */
3721 enable_ip6_interface (vm, sw_if_index);
3723 /* look up the radv_t information for this interface */
3724 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3726 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3730 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3733 if (!ip6_address_is_link_local_unicast (address))
3734 radv_info->ref_count++;
3736 /* lookup prefix info for this address on this interface */
3737 uword *p = mhash_get (&radv_info->address_to_mldp_index, &a);
3739 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
3741 /* add -solicted node multicast address */
3742 if (!mcast_group_info)
3746 pool_get (radv_info->mldp_group_pool, mcast_group_info);
3748 mi = mcast_group_info - radv_info->mldp_group_pool;
3749 mhash_set (&radv_info->address_to_mldp_index, &a, mi,
3752 mcast_group_info->type = 4;
3753 mcast_group_info->mcast_source_address_pool = 0;
3754 mcast_group_info->num_sources = 0;
3755 clib_memcpy (&mcast_group_info->mcast_address, &a,
3756 sizeof (ip6_address_t));
3764 /* look up the radv_t information for this interface */
3765 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3767 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3772 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3774 /* lookup prefix info for this address on this interface */
3775 uword *p = mhash_get (&radv_info->address_to_mldp_index, &a);
3777 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
3779 if (mcast_group_info)
3781 mhash_unset (&radv_info->address_to_mldp_index, &a,
3783 pool_put (radv_info->mldp_group_pool, mcast_group_info);
3786 /* if interface up send MLDP "report" */
3787 radv_info->all_routers_mcast = 0;
3790 if (!ip6_address_is_link_local_unicast (address))
3791 radv_info->ref_count--;
3793 /* Ensure that IPv6 is disabled, and LL removed after ref_count reaches 0 */
3794 disable_ip6_interface (vm, sw_if_index);
3799 ip6_set_neighbor_limit (u32 neighbor_limit)
3801 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3803 nm->limit_neighbor_cache_size = neighbor_limit;
3807 static clib_error_t *
3808 ip6_neighbor_init (vlib_main_t * vm)
3810 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3811 ip6_main_t *im = &ip6_main;
3813 mhash_init (&nm->neighbor_index_by_key,
3814 /* value size */ sizeof (uword),
3815 /* key size */ sizeof (ip6_neighbor_key_t));
3817 icmp6_register_type (vm, ICMP6_neighbor_solicitation,
3818 ip6_icmp_neighbor_solicitation_node.index);
3819 icmp6_register_type (vm, ICMP6_neighbor_advertisement,
3820 ip6_icmp_neighbor_advertisement_node.index);
3821 icmp6_register_type (vm, ICMP6_router_solicitation,
3822 ip6_icmp_router_solicitation_node.index);
3823 icmp6_register_type (vm, ICMP6_router_advertisement,
3824 ip6_icmp_router_advertisement_node.index);
3826 /* handler node for ip6 neighbor discovery events and timers */
3827 vlib_register_node (vm, &ip6_icmp_neighbor_discovery_event_node);
3829 /* add call backs */
3830 ip6_add_del_interface_address_callback_t cb;
3831 memset (&cb, 0x0, sizeof (ip6_add_del_interface_address_callback_t));
3833 /* when an interface address changes... */
3834 cb.function = ip6_neighbor_add_del_interface_address;
3835 cb.function_opaque = 0;
3836 vec_add1 (im->add_del_interface_address_callbacks, cb);
3838 mhash_init (&nm->pending_resolutions_by_address,
3839 /* value size */ sizeof (uword),
3840 /* key size */ sizeof (ip6_address_t));
3842 mhash_init (&nm->mac_changes_by_address,
3843 /* value size */ sizeof (uword),
3844 /* key size */ sizeof (ip6_address_t));
3846 /* default, configurable */
3847 nm->limit_neighbor_cache_size = 50000;
3850 /* $$$$ Hack fix for today */
3851 vec_validate_init_empty
3852 (im->discover_neighbor_next_index_by_hw_if_index, 32, 0 /* drop */ );
3858 VLIB_INIT_FUNCTION (ip6_neighbor_init);
3862 vnet_register_ip6_neighbor_resolution_event (vnet_main_t * vnm,
3865 uword type_opaque, uword data)
3867 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3868 ip6_address_t *address = address_arg;
3870 pending_resolution_t *pr;
3872 pool_get (nm->pending_resolutions, pr);
3874 pr->next_index = ~0;
3875 pr->node_index = node_index;
3876 pr->type_opaque = type_opaque;
3879 p = mhash_get (&nm->pending_resolutions_by_address, address);
3882 /* Insert new resolution at the head of the list */
3883 pr->next_index = p[0];
3884 mhash_unset (&nm->pending_resolutions_by_address, address, 0);
3887 mhash_set (&nm->pending_resolutions_by_address, address,
3888 pr - nm->pending_resolutions, 0 /* old value */ );
3892 vnet_add_del_ip6_nd_change_event (vnet_main_t * vnm,
3893 void *data_callback,
3897 uword type_opaque, uword data, int is_add)
3899 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3900 ip6_address_t *address = address_arg;
3902 pending_resolution_t *mc;
3903 void (*fp) (u32, u8 *) = data_callback;
3907 pool_get (nm->mac_changes, mc);
3909 mc->next_index = ~0;
3910 mc->node_index = node_index;
3911 mc->type_opaque = type_opaque;
3913 mc->data_callback = data_callback;
3916 p = mhash_get (&nm->mac_changes_by_address, address);
3919 /* Insert new resolution at the head of the list */
3920 mc->next_index = p[0];
3921 mhash_unset (&nm->mac_changes_by_address, address, 0);
3924 mhash_set (&nm->mac_changes_by_address, address,
3925 mc - nm->mac_changes, 0);
3931 pending_resolution_t *mc_last = 0;
3933 p = mhash_get (&nm->mac_changes_by_address, address);
3935 return VNET_API_ERROR_NO_SUCH_ENTRY;
3939 while (index != (u32) ~ 0)
3941 mc = pool_elt_at_index (nm->mac_changes, index);
3942 if (mc->node_index == node_index &&
3943 mc->type_opaque == type_opaque && mc->pid == pid)
3945 /* Clients may need to clean up pool entries, too */
3947 (*fp) (mc->data, 0 /* no new mac addrs */ );
3950 mhash_unset (&nm->mac_changes_by_address, address, 0);
3951 if (mc->next_index != ~0)
3952 mhash_set (&nm->mac_changes_by_address, address,
3954 pool_put (nm->mac_changes, mc);
3960 mc_last->next_index = mc->next_index;
3961 pool_put (nm->mac_changes, mc);
3966 index = mc->next_index;
3969 return VNET_API_ERROR_NO_SUCH_ENTRY;
3974 vnet_ip6_nd_term (vlib_main_t * vm,
3975 vlib_node_runtime_t * node,
3977 ethernet_header_t * eth,
3978 ip6_header_t * ip, u32 sw_if_index, u16 bd_index, u8 shg)
3980 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3981 icmp6_neighbor_solicitation_or_advertisement_header_t *ndh;
3982 pending_resolution_t *mc;
3985 ndh = ip6_next_header (ip);
3986 if (ndh->icmp.type != ICMP6_neighbor_solicitation &&
3987 ndh->icmp.type != ICMP6_neighbor_advertisement)
3990 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
3991 (p0->flags & VLIB_BUFFER_IS_TRACED)))
3993 u8 *t0 = vlib_add_trace (vm, node, p0,
3994 sizeof (icmp6_input_trace_t));
3995 clib_memcpy (t0, ip, sizeof (icmp6_input_trace_t));
3998 /* Check if anyone want ND events for L2 BDs */
3999 p = mhash_get (&nm->mac_changes_by_address, &ip6a_zero);
4000 if (p && shg == 0 && /* Only SHG 0 interface which is more likely local */
4001 !ip6_address_is_link_local_unicast (&ip->src_address))
4003 u32 next_index = p[0];
4004 while (next_index != (u32) ~ 0)
4006 int (*fp) (u32, u8 *, u32, ip6_address_t *);
4008 mc = pool_elt_at_index (nm->mac_changes, next_index);
4009 fp = mc->data_callback;
4010 /* Call the callback, return 1 to suppress dup events */
4012 rv = (*fp) (mc->data,
4013 eth->src_address, sw_if_index, &ip->src_address);
4014 /* Signal the resolver process */
4016 vlib_process_signal_event (vm, mc->node_index,
4017 mc->type_opaque, mc->data);
4018 next_index = mc->next_index;
4022 /* Check if MAC entry exsist for solicited target IP */
4023 if (ndh->icmp.type == ICMP6_neighbor_solicitation)
4025 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *opt;
4026 l2_bridge_domain_t *bd_config;
4029 opt = (void *) (ndh + 1);
4030 if ((opt->header.type !=
4031 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address) ||
4032 (opt->header.n_data_u64s != 1))
4033 return 0; /* source link layer address option not present */
4035 bd_config = vec_elt_at_index (l2input_main.bd_configs, bd_index);
4037 (u8 *) hash_get_mem (bd_config->mac_by_ip6, &ndh->target_address);
4039 { /* found ip-mac entry, generate eighbor advertisement response */
4041 vlib_node_runtime_t *error_node =
4042 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
4043 ip->dst_address = ip->src_address;
4044 ip->src_address = ndh->target_address;
4045 ip->hop_limit = 255;
4047 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
4048 clib_memcpy (opt->ethernet_address, macp, 6);
4049 ndh->icmp.type = ICMP6_neighbor_advertisement;
4050 ndh->advertisement_flags = clib_host_to_net_u32
4051 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED |
4052 ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
4053 ndh->icmp.checksum = 0;
4054 ndh->icmp.checksum =
4055 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip, &bogus_length);
4056 clib_memcpy (eth->dst_address, eth->src_address, 6);
4057 clib_memcpy (eth->src_address, macp, 6);
4058 vlib_error_count (vm, error_node->node_index,
4059 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX, 1);
4069 ethernet_ndp_change_mac (u32 sw_if_index)
4071 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4075 pool_foreach (n, nm->neighbor_pool,
4077 if (n->key.sw_if_index == sw_if_index)
4079 adj_nbr_walk_nh6 (sw_if_index,
4080 &n->key.ip6_address,
4081 ip6_nd_mk_complete_walk, n);
4088 * fd.io coding-style-patch-verification: ON
4091 * eval: (c-set-style "gnu")