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/ethernet/ethernet.h>
20 #include <vppinfra/mhash.h>
21 #include <vppinfra/md5.h>
22 #include <vnet/adj/adj.h>
23 #include <vnet/fib/fib_table.h>
24 #include <vnet/fib/ip6_fib.h>
27 #include <vnet/devices/dpdk/dpdk.h>
32 * @brief IPv6 Neighbor Adjacency and Neighbor Discovery.
34 * The files contains the API and CLI code for managing IPv6 neighbor
35 * adjacency tables and neighbor discovery logic.
39 ip6_address_t ip6_address;
44 /* can't use sizeof link_layer_address, that's 8 */
45 #define ETHER_MAC_ADDR_LEN 6
48 ip6_neighbor_key_t key;
49 u8 link_layer_address[8];
51 #define IP6_NEIGHBOR_FLAG_STATIC (1 << 0)
52 #define IP6_NEIGHBOR_FLAG_DYNAMIC (2 << 0)
53 u64 cpu_time_last_updated;
54 fib_node_index_t fib_entry_index;
57 /* advertised prefix option */
59 /* basic advertised information */
63 int adv_autonomous_flag;
64 u32 adv_valid_lifetime_in_secs;
65 u32 adv_pref_lifetime_in_secs;
67 /* advertised values are computed from these times if decrementing */
68 f64 valid_lifetime_expires;
69 f64 pref_lifetime_expires;
71 /* local information */
73 int deprecated_prefix_flag;
74 int decrement_lifetime_flag;
76 #define MIN_ADV_VALID_LIFETIME 7203 /* seconds */
77 #define DEF_ADV_VALID_LIFETIME 2592000
78 #define DEF_ADV_PREF_LIFETIME 604800
80 /* extensions are added here, mobile, DNS etc.. */
85 /* group information */
87 ip6_address_t mcast_address;
89 ip6_address_t *mcast_source_address_pool;
92 /* configured router advertisement information per ipv6 interface */
95 /* advertised config information, zero means unspecified */
99 u16 adv_router_lifetime_in_sec;
100 u32 adv_neighbor_reachable_time_in_msec;
101 u32 adv_time_in_msec_between_retransmitted_neighbor_solicitations;
106 /* source link layer option */
107 u8 link_layer_address[8];
108 u8 link_layer_addr_len;
111 ip6_radv_prefix_t * adv_prefixes_pool;
113 /* Hash table mapping address to index in interface advertised prefix pool. */
114 mhash_t address_to_prefix_index;
116 /* MLDP group information */
117 ip6_mldp_group_t * mldp_group_pool;
119 /* Hash table mapping address to index in mldp address pool. */
120 mhash_t address_to_mldp_index;
122 /* local information */
125 int send_radv; /* radv on/off on this interface - set by config */
126 int cease_radv; /* we are ceasing to send - set byf config */
128 int adv_link_layer_address;
130 int failed_device_check;
131 int all_routers_mcast;
135 adj_index_t all_nodes_adj_index;
136 adj_index_t all_routers_adj_index;
137 adj_index_t all_mldv2_routers_adj_index;
139 /* timing information */
140 #define DEF_MAX_RADV_INTERVAL 200
141 #define DEF_MIN_RADV_INTERVAL .75 * DEF_MAX_RADV_INTERVAL
142 #define DEF_CURR_HOP_LIMIT 64
143 #define DEF_DEF_RTR_LIFETIME 3 * DEF_MAX_RADV_INTERVAL
144 #define MAX_DEF_RTR_LIFETIME 9000
146 #define MAX_INITIAL_RTR_ADVERT_INTERVAL 16 /* seconds */
147 #define MAX_INITIAL_RTR_ADVERTISEMENTS 3 /*transmissions */
148 #define MIN_DELAY_BETWEEN_RAS 3 /* seconds */
149 #define MAX_DELAY_BETWEEN_RAS 1800 /* seconds */
150 #define MAX_RA_DELAY_TIME .5 /* seconds */
152 f64 max_radv_interval;
153 f64 min_radv_interval;
154 f64 min_delay_between_radv;
155 f64 max_delay_between_radv;
156 f64 max_rtr_default_lifetime;
159 f64 last_multicast_time;
160 f64 next_multicast_time;
163 u32 initial_adverts_count;
164 f64 initial_adverts_interval;
165 u32 initial_adverts_sent;
168 u32 n_advertisements_sent;
169 u32 n_solicitations_rcvd;
170 u32 n_solicitations_dropped;
172 /* Link local address to use (defaults to underlying physical for logical interfaces */
173 ip6_address_t link_local_address;
174 u8 link_local_prefix_len;
183 /* Used for nd event notification only */
184 void * data_callback;
186 } pending_resolution_t;
190 /* Hash tables mapping name to opcode. */
191 uword * opcode_by_name;
193 /* lite beer "glean" adjacency handling */
194 mhash_t pending_resolutions_by_address;
195 pending_resolution_t * pending_resolutions;
197 /* Mac address change notification */
198 mhash_t mac_changes_by_address;
199 pending_resolution_t * mac_changes;
201 u32 * neighbor_input_next_index_by_hw_if_index;
203 ip6_neighbor_t * neighbor_pool;
205 mhash_t neighbor_index_by_key;
207 u32 * if_radv_pool_index_by_sw_if_index;
209 ip6_radv_t * if_radv_pool;
211 /* Neighbor attack mitigation */
212 u32 limit_neighbor_cache_size;
213 u32 neighbor_delete_rotor;
215 } ip6_neighbor_main_t;
217 static ip6_neighbor_main_t ip6_neighbor_main;
218 static ip6_address_t ip6a_zero; /* ip6 address 0 */
220 static u8 * format_ip6_neighbor_ip6_entry (u8 * s, va_list * va)
222 vlib_main_t * vm = va_arg (*va, vlib_main_t *);
223 ip6_neighbor_t * n = va_arg (*va, ip6_neighbor_t *);
224 vnet_main_t * vnm = vnet_get_main();
225 vnet_sw_interface_t * si;
229 return format (s, "%=12s%=20s%=6s%=20s%=40s", "Time", "Address", "Flags", "Link layer", "Interface");
231 if (n->flags & IP6_NEIGHBOR_FLAG_DYNAMIC)
232 flags = format(flags, "D");
234 if (n->flags & IP6_NEIGHBOR_FLAG_STATIC)
235 flags = format(flags, "S");
237 si = vnet_get_sw_interface (vnm, n->key.sw_if_index);
238 s = format (s, "%=12U%=20U%=6s%=20U%=40U",
239 format_vlib_cpu_time, vm, n->cpu_time_last_updated,
240 format_ip6_address, &n->key.ip6_address,
241 flags ? (char *)flags : "",
242 format_ethernet_address, n->link_layer_address,
243 format_vnet_sw_interface_name, vnm, si);
249 static clib_error_t *
250 ip6_neighbor_sw_interface_up_down (vnet_main_t * vnm,
254 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
257 if (! (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
259 u32 i, * to_delete = 0;
261 pool_foreach (n, nm->neighbor_pool, ({
262 if (n->key.sw_if_index == sw_if_index)
263 vec_add1 (to_delete, n - nm->neighbor_pool);
266 for (i = 0; i < vec_len (to_delete); i++)
268 n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
269 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
270 fib_table_entry_delete_index (n->fib_entry_index, FIB_SOURCE_ADJ);
271 pool_put (nm->neighbor_pool, n);
274 vec_free (to_delete);
280 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_neighbor_sw_interface_up_down);
282 static void unset_random_neighbor_entry (void)
284 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
285 vnet_main_t * vnm = vnet_get_main();
286 vlib_main_t * vm = vnm->vlib_main;
290 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
291 nm->neighbor_delete_rotor = index;
293 /* Try again from elt 0, could happen if an intfc goes down */
296 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
297 nm->neighbor_delete_rotor = index;
300 /* Nothing left in the pool */
304 e = pool_elt_at_index (nm->neighbor_pool, index);
306 vnet_unset_ip6_ethernet_neighbor (vm, e->key.sw_if_index,
308 e->link_layer_address,
315 u8 link_layer_address[6];
318 } ip6_neighbor_set_unset_rpc_args_t;
321 static void ip6_neighbor_set_unset_rpc_callback
322 ( ip6_neighbor_set_unset_rpc_args_t * a);
324 static void set_unset_ip6_neighbor_rpc
328 u8 *link_layer_addreess,
329 int is_add, int is_static)
331 ip6_neighbor_set_unset_rpc_args_t args;
332 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
334 args.sw_if_index = sw_if_index;
335 args.is_add = is_add;
336 args.is_static = is_static;
337 clib_memcpy (&args.addr, a, sizeof (*a));
338 clib_memcpy (args.link_layer_address, link_layer_addreess, 6);
340 vl_api_rpc_call_main_thread (ip6_neighbor_set_unset_rpc_callback,
341 (u8 *) &args, sizeof (args));
346 ip6_nbr_probe (ip_adjacency_t *adj)
348 icmp6_neighbor_solicitation_header_t * h;
349 vnet_main_t * vnm = vnet_get_main();
350 ip6_main_t * im = &ip6_main;
351 ip_interface_address_t * ia;
352 ip6_address_t * dst, *src;
353 vnet_hw_interface_t * hi;
354 vnet_sw_interface_t * si;
360 vm = vlib_get_main();
362 si = vnet_get_sw_interface(vnm, adj->rewrite_header.sw_if_index);
363 dst = &adj->sub_type.nbr.next_hop.ip6;
365 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
369 src = ip6_interface_address_matching_destination(im, dst,
370 adj->rewrite_header.sw_if_index,
377 h = vlib_packet_template_get_packet(vm,
378 &im->discover_neighbor_packet_template,
381 hi = vnet_get_sup_hw_interface(vnm, adj->rewrite_header.sw_if_index);
383 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
384 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
385 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
386 h->ip.src_address = src[0];
387 h->neighbor.target_address = dst[0];
389 clib_memcpy (h->link_layer_option.ethernet_address,
391 vec_len(hi->hw_address));
393 h->neighbor.icmp.checksum =
394 ip6_tcp_udp_icmp_compute_checksum(vm, 0, &h->ip, &bogus_length);
395 ASSERT(bogus_length == 0);
397 b = vlib_get_buffer (vm, bi);
398 vnet_buffer (b)->sw_if_index[VLIB_RX] =
399 vnet_buffer (b)->sw_if_index[VLIB_TX] =
400 adj->rewrite_header.sw_if_index;
402 /* Add encapsulation string for software interface (e.g. ethernet header). */
403 vnet_rewrite_one_header(adj[0], h, sizeof (ethernet_header_t));
404 vlib_buffer_advance(b, -adj->rewrite_header.data_bytes);
407 vlib_frame_t * f = vlib_get_frame_to_node(vm, hi->output_node_index);
408 u32 * to_next = vlib_frame_vector_args(f);
411 vlib_put_frame_to_node(vm, hi->output_node_index, f);
416 ip6_nd_mk_complete (adj_index_t ai, ip6_neighbor_t * nbr)
418 adj_nbr_update_rewrite (ai, ADJ_NBR_REWRITE_FLAG_COMPLETE,
419 ethernet_build_rewrite (vnet_get_main (),
420 nbr->key.sw_if_index,
421 adj_get_link_type(ai),
422 nbr->link_layer_address));
426 ip6_nd_mk_incomplete (adj_index_t ai, ip6_neighbor_t * nbr)
428 adj_nbr_update_rewrite (
430 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
431 ethernet_build_rewrite (vnet_get_main (),
432 nbr->key.sw_if_index,
433 adj_get_link_type(ai),
434 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
437 #define IP6_NBR_MK_KEY(k, sw_if_index, addr) \
439 k.sw_if_index = sw_if_index; \
440 k.ip6_address = *addr; \
444 static ip6_neighbor_t *
445 ip6_nd_find (u32 sw_if_index,
446 const ip6_address_t * addr)
448 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
449 ip6_neighbor_t * n = NULL;
450 ip6_neighbor_key_t k;
453 IP6_NBR_MK_KEY(k, sw_if_index, addr);
455 p = mhash_get (&nm->neighbor_index_by_key, &k);
457 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
464 ip6_nd_mk_complete_walk (adj_index_t ai, void *ctx)
466 ip6_neighbor_t *nbr = ctx;
468 ip6_nd_mk_complete (ai, nbr);
470 return (ADJ_WALK_RC_CONTINUE);
474 ip6_nd_mk_incomplete_walk (adj_index_t ai, void *ctx)
476 ip6_neighbor_t *nbr = ctx;
478 ip6_nd_mk_incomplete (ai, nbr);
480 return (ADJ_WALK_RC_CONTINUE);
484 ip6_ethernet_update_adjacency (vnet_main_t * vnm,
493 nbr = ip6_nd_find (sw_if_index, &adj->sub_type.nbr.next_hop.ip6);
497 adj_nbr_walk_nh6 (sw_if_index, &nbr->key.ip6_address,
498 ip6_nd_mk_complete_walk, nbr);
503 * no matching ND entry.
504 * construct the rewrite required to for an ND packet, and stick
505 * that in the adj's pipe to smoke.
507 adj_nbr_update_rewrite (ai,
508 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
509 ethernet_build_rewrite (vnm,
512 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
515 * since the FIB has added this adj for a route, it makes sense it may
516 * want to forward traffic sometime soon. Let's send a speculative ND.
517 * just one. If we were to do periodically that wouldn't be bad either,
518 * but that's more code than i'm prepared to write at this time for
519 * relatively little reward.
526 vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
529 u8 * link_layer_address,
530 uword n_bytes_link_layer_address,
533 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
534 ip6_neighbor_key_t k;
535 ip6_neighbor_t * n = 0;
536 int make_new_nd_cache_entry=1;
539 pending_resolution_t * pr, * mc;
542 if (os_get_cpu_number())
544 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
545 1 /* set new neighbor */, is_static);
550 k.sw_if_index = sw_if_index;
551 k.ip6_address = a[0];
554 p = mhash_get (&nm->neighbor_index_by_key, &k);
556 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
557 /* Refuse to over-write static neighbor entry. */
559 (n->flags & IP6_NEIGHBOR_FLAG_STATIC))
561 make_new_nd_cache_entry = 0;
564 if (make_new_nd_cache_entry) {
567 .fp_proto = FIB_PROTOCOL_IP6,
569 .ip6 = k.ip6_address,
574 pool_get (nm->neighbor_pool, n);
575 mhash_set (&nm->neighbor_index_by_key, &k, n - nm->neighbor_pool,
579 clib_memcpy (n->link_layer_address,
581 n_bytes_link_layer_address);
584 * create the adj-fib. the entry in the FIB table for and to the peer.
586 fib_index = ip6_main.fib_index_by_sw_if_index[n->key.sw_if_index];
588 fib_table_entry_update_one_path(fib_index,
598 FIB_ROUTE_PATH_FLAG_NONE);
603 * prevent a DoS attack from the data-plane that
604 * spams us with no-op updates to the MAC address
606 if (0 == memcmp(n->link_layer_address,
608 n_bytes_link_layer_address))
611 clib_memcpy (n->link_layer_address,
613 n_bytes_link_layer_address);
616 /* Update time stamp and flags. */
617 n->cpu_time_last_updated = clib_cpu_time_now ();
619 n->flags |= IP6_NEIGHBOR_FLAG_STATIC;
621 n->flags |= IP6_NEIGHBOR_FLAG_DYNAMIC;
623 adj_nbr_walk_nh6 (sw_if_index,
625 ip6_nd_mk_complete_walk, n);
627 /* Customer(s) waiting for this address to be resolved? */
628 p = mhash_get (&nm->pending_resolutions_by_address, a);
633 while (next_index != (u32)~0)
635 pr = pool_elt_at_index (nm->pending_resolutions, next_index);
636 vlib_process_signal_event (vm, pr->node_index,
639 next_index = pr->next_index;
640 pool_put (nm->pending_resolutions, pr);
643 mhash_unset (&nm->pending_resolutions_by_address, a, 0);
646 /* Customer(s) requesting ND event for this address? */
647 p = mhash_get (&nm->mac_changes_by_address, a);
652 while (next_index != (u32)~0)
654 int (*fp)(u32, u8 *, u32, ip6_address_t *);
656 mc = pool_elt_at_index (nm->mac_changes, next_index);
657 fp = mc->data_callback;
659 /* Call the user's data callback, return 1 to suppress dup events */
661 rv = (*fp)(mc->data, link_layer_address, sw_if_index, &ip6a_zero);
663 * Signal the resolver process, as long as the user
664 * says they want to be notified
667 vlib_process_signal_event (vm, mc->node_index,
670 next_index = mc->next_index;
678 vnet_unset_ip6_ethernet_neighbor (vlib_main_t * vm,
681 u8 * link_layer_address,
682 uword n_bytes_link_layer_address)
684 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
685 ip6_neighbor_key_t k;
691 if (os_get_cpu_number())
693 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
699 k.sw_if_index = sw_if_index;
700 k.ip6_address = a[0];
703 p = mhash_get (&nm->neighbor_index_by_key, &k);
710 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
712 adj_nbr_walk_nh6 (sw_if_index,
714 ip6_nd_mk_incomplete_walk,
717 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
718 fib_table_entry_delete_index (n->fib_entry_index, FIB_SOURCE_ADJ);
719 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);
740 ip6_neighbor_sort (void *a1, void *a2)
742 vnet_main_t * vnm = vnet_get_main();
743 ip6_neighbor_t * n1 = a1, * n2 = a2;
745 cmp = vnet_sw_interface_compare (vnm, n1->key.sw_if_index,
746 n2->key.sw_if_index);
748 cmp = ip6_address_compare (&n1->key.ip6_address, &n2->key.ip6_address);
752 static clib_error_t *
753 show_ip6_neighbors (vlib_main_t * vm,
754 unformat_input_t * input,
755 vlib_cli_command_t * cmd)
757 vnet_main_t * vnm = vnet_get_main();
758 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
759 ip6_neighbor_t * n, * ns;
760 clib_error_t * error = 0;
763 /* Filter entries by interface if given. */
765 (void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index);
768 pool_foreach (n, nm->neighbor_pool, ({ vec_add1 (ns, n[0]); }));
771 vec_sort_with_function (ns, ip6_neighbor_sort);
772 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, 0);
773 vec_foreach (n, ns) {
774 if (sw_if_index != ~0 && n->key.sw_if_index != sw_if_index)
776 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, n);
785 * This command is used to display the adjacent IPv6 hosts found via
786 * neighbor discovery. Optionally, limit the output to the specified
790 * Example of how to display the IPv6 neighbor adjacency table:
791 * @cliexstart{show ip6 neighbors}
792 * Time Address Flags Link layer Interface
793 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
794 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
795 * 886.6654 ::1:1:c:0:9 S 02:fe:e4:45:27:5b GigabitEthernet3/0/0
797 * Example of how to display the IPv6 neighbor adjacency table for given interface:
798 * @cliexstart{show ip6 neighbors GigabitEthernet2/0/0}
799 * Time Address Flags Link layer Interface
800 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
801 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
805 VLIB_CLI_COMMAND (show_ip6_neighbors_command, static) = {
806 .path = "show ip6 neighbors",
807 .function = show_ip6_neighbors,
808 .short_help = "show ip6 neighbors [<interface>]",
812 static clib_error_t *
813 set_ip6_neighbor (vlib_main_t * vm,
814 unformat_input_t * input,
815 vlib_cli_command_t * cmd)
817 vnet_main_t * vnm = vnet_get_main();
825 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
827 /* intfc, ip6-address, mac-address */
828 if (unformat (input, "%U %U %U",
829 unformat_vnet_sw_interface, vnm, &sw_if_index,
830 unformat_ip6_address, &addr,
831 unformat_ethernet_address, mac_address))
834 else if (unformat (input, "delete") || unformat (input, "del"))
836 else if (unformat (input, "static"))
843 return clib_error_return (0, "Missing interface, ip6 or hw address");
846 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
847 mac_address, sizeof(mac_address), is_static);
849 vnet_unset_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
850 mac_address, sizeof(mac_address));
855 * This command is used to manually add an entry to the IPv6 neighbor
856 * adjacency table. Optionally, the entry can be added as static. It is
857 * also used to remove an entry from the table. Use the '<em>show ip6
858 * neighbors</em>' command to display all learned and manually entered entries.
861 * Example of how to add a static entry to the IPv6 neighbor adjacency table:
862 * @cliexcmd{set ip6 neighbor GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b static}
863 * Example of how to delete an entry from the IPv6 neighbor adjacency table:
864 * @cliexcmd{set ip6 neighbor del GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b}
867 VLIB_CLI_COMMAND (set_ip6_neighbor_command, static) = {
868 .path = "set ip6 neighbor",
869 .function = set_ip6_neighbor,
870 .short_help = "set ip6 neighbor [del] <interface> <ip6-address> <mac-address> [static]",
875 ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP,
876 ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY,
877 ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
878 } icmp6_neighbor_solicitation_or_advertisement_next_t;
880 static_always_inline uword
881 icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
882 vlib_node_runtime_t * node,
883 vlib_frame_t * frame,
884 uword is_solicitation)
886 vnet_main_t * vnm = vnet_get_main();
887 ip6_main_t * im = &ip6_main;
888 uword n_packets = frame->n_vectors;
889 u32 * from, * to_next;
890 u32 n_left_from, n_left_to_next, next_index, n_advertisements_sent;
891 icmp6_neighbor_discovery_option_type_t option_type;
892 vlib_node_runtime_t * error_node = vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
895 from = vlib_frame_vector_args (frame);
896 n_left_from = n_packets;
897 next_index = node->cached_next_index;
899 if (node->flags & VLIB_NODE_FLAG_TRACE)
900 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
902 sizeof (icmp6_input_trace_t));
906 ? ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address
907 : ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address);
908 n_advertisements_sent = 0;
910 while (n_left_from > 0)
912 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
914 while (n_left_from > 0 && n_left_to_next > 0)
918 icmp6_neighbor_solicitation_or_advertisement_header_t * h0;
919 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t * o0;
920 u32 bi0, options_len0, sw_if_index0, next0, error0;
921 u32 ip6_sadd_link_local, ip6_sadd_unspecified;
925 bi0 = to_next[0] = from[0];
932 p0 = vlib_get_buffer (vm, bi0);
933 ip0 = vlib_buffer_get_current (p0);
934 h0 = ip6_next_header (ip0);
935 options_len0 = clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
937 error0 = ICMP6_ERROR_NONE;
938 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
939 ip6_sadd_link_local = ip6_address_is_link_local_unicast(&ip0->src_address);
940 ip6_sadd_unspecified = ip6_address_is_unspecified (&ip0->src_address);
942 /* Check that source address is unspecified, link-local or else on-link. */
943 if (!ip6_sadd_unspecified && !ip6_sadd_link_local)
945 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
947 if (ADJ_INDEX_INVALID != src_adj_index0)
949 ip_adjacency_t * adj0 = ip_get_adjacency (&im->lookup_main, src_adj_index0);
951 /* Allow all realistic-looking rewrite adjacencies to pass */
952 ni0 = adj0->lookup_next_index;
953 is_rewrite0 = (ni0 >= IP_LOOKUP_NEXT_ARP) &&
954 (ni0 < IP6_LOOKUP_N_NEXT);
956 error0 = ((adj0->rewrite_header.sw_if_index != sw_if_index0
958 ? ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK
963 error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK;
967 o0 = (void *) (h0 + 1);
968 o0 = ((options_len0 == 8 && o0->header.type == option_type
969 && o0->header.n_data_u64s == 1) ? o0 : 0);
971 /* If src address unspecified or link local, donot learn neighbor MAC */
972 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
973 !ip6_sadd_unspecified && !ip6_sadd_link_local))
975 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
976 if (nm->limit_neighbor_cache_size &&
977 pool_elts (nm->neighbor_pool) >= nm->limit_neighbor_cache_size)
978 unset_random_neighbor_entry();
979 vnet_set_ip6_ethernet_neighbor (
981 is_solicitation ? &ip0->src_address : &h0->target_address,
982 o0->ethernet_address, sizeof (o0->ethernet_address), 0);
985 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
987 /* Check that target address is local to this router. */
988 fib_node_index_t fei;
991 fib_index = ip6_fib_table_get_index_for_sw_if_index(sw_if_index0);
995 error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
999 fei = ip6_fib_table_lookup_exact_match(fib_index,
1000 &h0->target_address,
1003 if (FIB_NODE_INDEX_INVALID == fei ||
1004 !(FIB_ENTRY_FLAG_LOCAL &
1005 fib_entry_get_flags_for_source(fei, FIB_SOURCE_INTERFACE)))
1007 error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1012 if (is_solicitation)
1013 next0 = (error0 != ICMP6_ERROR_NONE
1014 ? ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP
1015 : ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY);
1019 error0 = error0 == ICMP6_ERROR_NONE ?
1020 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_RX : error0;
1023 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1025 vnet_sw_interface_t * sw_if0;
1026 ethernet_interface_t * eth_if0;
1027 ethernet_header_t *eth0;
1029 /* dst address is either source address or the all-nodes mcast addr */
1030 if(!ip6_sadd_unspecified)
1031 ip0->dst_address = ip0->src_address;
1033 ip6_set_reserved_multicast_address(&ip0->dst_address,
1034 IP6_MULTICAST_SCOPE_link_local,
1035 IP6_MULTICAST_GROUP_ID_all_hosts);
1037 ip0->src_address = h0->target_address;
1038 ip0->hop_limit = 255;
1039 h0->icmp.type = ICMP6_neighbor_advertisement;
1041 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1042 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1043 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1046 clib_memcpy (o0->ethernet_address, eth_if0->address, 6);
1048 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
1051 h0->advertisement_flags = clib_host_to_net_u32
1052 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED
1053 | ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
1055 h0->icmp.checksum = 0;
1057 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1059 ASSERT(bogus_length == 0);
1061 /* Reuse current MAC header, copy SMAC to DMAC and
1062 * interface MAC to SMAC */
1063 vlib_buffer_advance(p0, - ethernet_buffer_header_size(p0));
1064 eth0 = vlib_buffer_get_current(p0);
1065 clib_memcpy(eth0->dst_address, eth0->src_address, 6);
1067 clib_memcpy(eth0->src_address, eth_if0->address, 6);
1069 /* Setup input and output sw_if_index for packet */
1070 ASSERT(vnet_buffer(p0)->sw_if_index[VLIB_RX] == sw_if_index0);
1071 vnet_buffer(p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1072 vnet_buffer(p0)->sw_if_index[VLIB_RX] =
1073 vnet_main.local_interface_sw_if_index;
1075 n_advertisements_sent++;
1078 p0->error = error_node->errors[error0];
1080 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1081 to_next, n_left_to_next,
1085 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1088 /* Account for advertisements sent. */
1089 vlib_error_count (vm, error_node->node_index, ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX, n_advertisements_sent);
1091 return frame->n_vectors;
1094 /* for "syslogging" - use elog for now */
1095 #define foreach_log_level \
1096 _ (DEBUG, "DEBUG") \
1097 _ (INFO, "INFORMATION") \
1098 _ (NOTICE, "NOTICE") \
1099 _ (WARNING, "WARNING") \
1101 _ (CRIT, "CRITICAL") \
1102 _ (ALERT, "ALERT") \
1103 _ (EMERG, "EMERGENCY")
1106 #define _(f,s) LOG_##f,
1111 static char * log_level_strings[] = {
1117 static int logmask = 1 << LOG_DEBUG;
1120 ip6_neighbor_syslog(vlib_main_t *vm, int priority, char * fmt, ...)
1122 /* just use elog for now */
1126 if( (priority > LOG_EMERG) ||
1127 !(logmask & (1 << priority)))
1133 what = va_format (0, fmt, &va);
1135 ELOG_TYPE_DECLARE (e) = {
1136 .format = "ip6 nd: (%s): %s",
1137 .format_args = "T4T4",
1139 struct { u32 s[2]; } * ed;
1140 ed = ELOG_DATA (&vm->elog_main, e);
1141 ed->s[0] = elog_string(&vm->elog_main, log_level_strings[priority]);
1142 ed->s[1] = elog_string(&vm->elog_main, (char *)what);
1148 /* ipv6 neighbor discovery - router advertisements */
1150 ICMP6_ROUTER_SOLICITATION_NEXT_DROP,
1151 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW,
1152 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX,
1153 ICMP6_ROUTER_SOLICITATION_N_NEXT,
1154 } icmp6_router_solicitation_or_advertisement_next_t;
1156 static_always_inline uword
1157 icmp6_router_solicitation(vlib_main_t * vm,
1158 vlib_node_runtime_t * node,
1159 vlib_frame_t * frame)
1161 vnet_main_t * vnm = vnet_get_main();
1162 ip6_main_t * im = &ip6_main;
1163 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
1164 uword n_packets = frame->n_vectors;
1165 u32 * from, * to_next;
1166 u32 n_left_from, n_left_to_next, next_index;
1167 u32 n_advertisements_sent = 0;
1170 icmp6_neighbor_discovery_option_type_t option_type;
1172 vlib_node_runtime_t * error_node = vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1174 from = vlib_frame_vector_args (frame);
1175 n_left_from = n_packets;
1176 next_index = node->cached_next_index;
1178 if (node->flags & VLIB_NODE_FLAG_TRACE)
1179 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1181 sizeof (icmp6_input_trace_t));
1183 /* source may append his LL address */
1184 option_type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1186 while (n_left_from > 0)
1188 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1190 while (n_left_from > 0 && n_left_to_next > 0)
1194 ip6_radv_t *radv_info = 0;
1196 icmp6_neighbor_discovery_header_t * h0;
1197 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t * o0;
1199 u32 bi0, options_len0, sw_if_index0, next0, error0;
1200 u32 is_solicitation = 1, is_dropped = 0;
1201 u32 is_unspecified, is_link_local;
1203 bi0 = to_next[0] = from[0];
1208 n_left_to_next -= 1;
1210 p0 = vlib_get_buffer (vm, bi0);
1211 ip0 = vlib_buffer_get_current (p0);
1212 h0 = ip6_next_header (ip0);
1213 options_len0 = clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1214 is_unspecified = ip6_address_is_unspecified (&ip0->src_address);
1215 is_link_local = ip6_address_is_link_local_unicast (&ip0->src_address);
1217 error0 = ICMP6_ERROR_NONE;
1218 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1220 /* check if solicitation (not from nd_timer node) */
1221 if (ip6_address_is_unspecified (&ip0->dst_address))
1222 is_solicitation = 0;
1224 /* Check that source address is unspecified, link-local or else on-link. */
1225 if (!is_unspecified && !is_link_local)
1227 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1229 if (ADJ_INDEX_INVALID != src_adj_index0)
1231 ip_adjacency_t * adj0 = ip_get_adjacency (&im->lookup_main,
1234 error0 = (adj0->rewrite_header.sw_if_index != sw_if_index0
1235 ? ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK
1240 error0 = ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK;
1244 /* check for source LL option and process */
1245 o0 = (void *) (h0 + 1);
1246 o0 = ((options_len0 == 8
1247 && o0->header.type == option_type
1248 && o0->header.n_data_u64s == 1)
1252 /* if src address unspecified IGNORE any options */
1253 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1254 !is_unspecified && !is_link_local)) {
1255 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
1256 if (nm->limit_neighbor_cache_size &&
1257 pool_elts (nm->neighbor_pool) >= nm->limit_neighbor_cache_size)
1258 unset_random_neighbor_entry();
1260 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1262 o0->ethernet_address,
1263 sizeof (o0->ethernet_address), 0);
1266 /* default is to drop */
1267 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1269 if (error0 == ICMP6_ERROR_NONE)
1271 vnet_sw_interface_t * sw_if0;
1272 ethernet_interface_t * eth_if0;
1275 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1276 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1277 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1279 /* only support ethernet interface type for now */
1280 error0 = (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF : error0;
1282 if (error0 == ICMP6_ERROR_NONE)
1286 /* adjust the sizeof the buffer to just include the ipv6 header */
1287 p0->current_length -= (options_len0 + sizeof(icmp6_neighbor_discovery_header_t));
1289 /* look up the radv_t information for this interface */
1290 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
1292 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1295 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1297 error0 = ((!radv_info) ? ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG : error0);
1299 if (error0 == ICMP6_ERROR_NONE)
1301 f64 now = vlib_time_now (vm);
1303 /* for solicited adverts - need to rate limit */
1306 if( (now - radv_info->last_radv_time) < MIN_DELAY_BETWEEN_RAS )
1309 radv_info->last_radv_time = now;
1313 icmp6_router_advertisement_header_t rh;
1315 rh.icmp.type = ICMP6_router_advertisement;
1317 rh.icmp.checksum = 0;
1319 rh.current_hop_limit = radv_info->curr_hop_limit;
1320 rh.router_lifetime_in_sec = clib_host_to_net_u16(radv_info->adv_router_lifetime_in_sec);
1321 rh.time_in_msec_between_retransmitted_neighbor_solicitations =
1322 clib_host_to_net_u32(radv_info->adv_time_in_msec_between_retransmitted_neighbor_solicitations);
1323 rh.neighbor_reachable_time_in_msec =
1324 clib_host_to_net_u32(radv_info->adv_neighbor_reachable_time_in_msec);
1326 rh.flags = (radv_info->adv_managed_flag) ? ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP : 0;
1327 rh.flags |= ( (radv_info->adv_other_flag) ? ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP : 0);
1330 u16 payload_length = sizeof(icmp6_router_advertisement_header_t);
1332 vlib_buffer_add_data (vm,
1333 p0->free_list_index,
1335 (void *)&rh, sizeof(icmp6_router_advertisement_header_t));
1337 if(radv_info->adv_link_layer_address)
1339 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t h;
1341 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1342 h.header.n_data_u64s = 1;
1344 /* copy ll address */
1345 clib_memcpy(&h.ethernet_address[0], eth_if0->address, 6);
1347 vlib_buffer_add_data (vm,
1348 p0->free_list_index,
1350 (void *)&h, sizeof(icmp6_neighbor_discovery_ethernet_link_layer_address_option_t));
1352 payload_length += sizeof(icmp6_neighbor_discovery_ethernet_link_layer_address_option_t);
1355 /* add MTU option */
1356 if(radv_info->adv_link_mtu)
1358 icmp6_neighbor_discovery_mtu_option_t h;
1361 h.mtu = clib_host_to_net_u32(radv_info->adv_link_mtu);
1362 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu;
1363 h.header.n_data_u64s = 1;
1365 payload_length += sizeof( icmp6_neighbor_discovery_mtu_option_t);
1367 vlib_buffer_add_data (vm,
1368 p0->free_list_index,
1370 (void *)&h, sizeof(icmp6_neighbor_discovery_mtu_option_t));
1373 /* add advertised prefix options */
1374 ip6_radv_prefix_t *pr_info;
1376 pool_foreach (pr_info, radv_info->adv_prefixes_pool, ({
1378 if(pr_info->enabled &&
1379 (!pr_info->decrement_lifetime_flag || (pr_info->pref_lifetime_expires >0)))
1381 /* advertise this prefix */
1382 icmp6_neighbor_discovery_prefix_information_option_t h;
1384 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information;
1385 h.header.n_data_u64s = (sizeof(icmp6_neighbor_discovery_prefix_information_option_t) >> 3);
1387 h.dst_address_length = pr_info->prefix_len;
1389 h.flags = (pr_info->adv_on_link_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_FLAG_ON_LINK : 0;
1390 h.flags |= (pr_info->adv_autonomous_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_AUTO : 0;
1392 if(radv_info->cease_radv && pr_info->deprecated_prefix_flag)
1394 h.valid_time = clib_host_to_net_u32(MIN_ADV_VALID_LIFETIME);
1395 h.preferred_time = 0;
1399 if(pr_info->decrement_lifetime_flag)
1401 pr_info->adv_valid_lifetime_in_secs = ((pr_info->valid_lifetime_expires > now)) ?
1402 (pr_info->valid_lifetime_expires - now) : 0;
1404 pr_info->adv_pref_lifetime_in_secs = ((pr_info->pref_lifetime_expires > now)) ?
1405 (pr_info->pref_lifetime_expires - now) : 0;
1408 h.valid_time = clib_host_to_net_u32(pr_info->adv_valid_lifetime_in_secs);
1409 h.preferred_time = clib_host_to_net_u32(pr_info->adv_pref_lifetime_in_secs) ;
1413 clib_memcpy(&h.dst_address, &pr_info->prefix, sizeof(ip6_address_t));
1415 payload_length += sizeof( icmp6_neighbor_discovery_prefix_information_option_t);
1417 vlib_buffer_add_data (vm,
1418 p0->free_list_index,
1420 (void *)&h, sizeof(icmp6_neighbor_discovery_prefix_information_option_t));
1425 /* add additional options before here */
1427 /* finish building the router advertisement... */
1428 if(!is_unspecified && radv_info->send_unicast)
1430 ip0->dst_address = ip0->src_address;
1434 /* target address is all-nodes mcast addr */
1435 ip6_set_reserved_multicast_address(&ip0->dst_address,
1436 IP6_MULTICAST_SCOPE_link_local,
1437 IP6_MULTICAST_GROUP_ID_all_hosts);
1440 /* source address MUST be the link-local address */
1441 ip0->src_address = radv_info->link_local_address;
1443 ip0->hop_limit = 255;
1444 ip0->payload_length = clib_host_to_net_u16 (payload_length);
1446 icmp6_router_advertisement_header_t * rh0 = (icmp6_router_advertisement_header_t *)(ip0 + 1);
1447 rh0->icmp.checksum =
1448 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1450 ASSERT(bogus_length == 0);
1452 /* setup output if and adjacency */
1453 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1454 vnet_main.local_interface_sw_if_index;
1456 if (is_solicitation)
1458 ethernet_header_t *eth0;
1459 /* Reuse current MAC header, copy SMAC to DMAC and
1460 * interface MAC to SMAC */
1461 vlib_buffer_reset (p0);
1462 eth0 = vlib_buffer_get_current(p0);
1463 clib_memcpy(eth0->dst_address, eth0->src_address, 6);
1464 clib_memcpy(eth0->src_address, eth_if0->address, 6);
1465 next0 = is_dropped ?
1466 next0 : ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX;
1467 vnet_buffer(p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1471 adj_index0 = radv_info->all_nodes_adj_index;
1472 if (adj_index0 == 0)
1473 error0 = ICMP6_ERROR_DST_LOOKUP_MISS;
1476 ip_adjacency_t * adj0 = ip_get_adjacency (&im->lookup_main, adj_index0);
1478 ((adj0->rewrite_header.sw_if_index != sw_if_index0
1479 || adj0->lookup_next_index != IP_LOOKUP_NEXT_REWRITE)
1480 ? ICMP6_ERROR_ROUTER_SOLICITATION_DEST_UNKNOWN
1482 next0 = is_dropped ?
1483 next0 : ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW;
1484 vnet_buffer (p0)->ip.adj_index[VLIB_RX] = adj_index0;
1488 radv_info->n_solicitations_dropped += is_dropped;
1489 radv_info->n_solicitations_rcvd += is_solicitation;
1491 if((error0 == ICMP6_ERROR_NONE) && !is_dropped)
1493 radv_info->n_advertisements_sent++;
1494 n_advertisements_sent++;
1500 p0->error = error_node->errors[error0];
1502 if(error0 != ICMP6_ERROR_NONE)
1503 vlib_error_count (vm, error_node->node_index, error0, 1);
1505 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1506 to_next, n_left_to_next,
1511 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1514 /* Account for router advertisements sent. */
1515 vlib_error_count (vm, error_node->node_index, ICMP6_ERROR_ROUTER_ADVERTISEMENTS_TX, n_advertisements_sent);
1517 return frame->n_vectors;
1520 /* validate advertised info for consistancy (see RFC-4861 section 6.2.7) - log any inconsistencies, packet will always be dropped */
1521 static_always_inline uword
1522 icmp6_router_advertisement(vlib_main_t * vm,
1523 vlib_node_runtime_t * node,
1524 vlib_frame_t * frame)
1526 vnet_main_t * vnm = vnet_get_main();
1527 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
1528 uword n_packets = frame->n_vectors;
1529 u32 * from, * to_next;
1530 u32 n_left_from, n_left_to_next, next_index;
1531 u32 n_advertisements_rcvd = 0;
1533 vlib_node_runtime_t * error_node = vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1535 from = vlib_frame_vector_args (frame);
1536 n_left_from = n_packets;
1537 next_index = node->cached_next_index;
1539 if (node->flags & VLIB_NODE_FLAG_TRACE)
1540 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1542 sizeof (icmp6_input_trace_t));
1544 while (n_left_from > 0)
1546 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1548 while (n_left_from > 0 && n_left_to_next > 0)
1552 ip6_radv_t *radv_info = 0;
1553 icmp6_router_advertisement_header_t * h0;
1554 u32 bi0, options_len0, sw_if_index0, next0, error0;
1556 bi0 = to_next[0] = from[0];
1561 n_left_to_next -= 1;
1563 p0 = vlib_get_buffer (vm, bi0);
1564 ip0 = vlib_buffer_get_current (p0);
1565 h0 = ip6_next_header (ip0);
1566 options_len0 = clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1568 error0 = ICMP6_ERROR_NONE;
1569 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1571 /* Check that source address is link-local*/
1572 error0 = (!ip6_address_is_link_local_unicast (&ip0->src_address)) ?
1573 ICMP6_ERROR_ROUTER_ADVERTISEMENT_SOURCE_NOT_LINK_LOCAL : error0;
1575 /* default is to drop */
1576 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1578 n_advertisements_rcvd++;
1580 if (error0 == ICMP6_ERROR_NONE)
1582 vnet_sw_interface_t * sw_if0;
1583 ethernet_interface_t * eth_if0;
1585 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1586 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1587 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1589 /* only support ethernet interface type for now */
1590 error0 = (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF : error0;
1592 if (error0 == ICMP6_ERROR_NONE)
1596 /* look up the radv_t information for this interface */
1597 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
1599 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1602 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1604 error0 = ((!radv_info) ? ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG : error0);
1606 if (error0 == ICMP6_ERROR_NONE)
1608 /* validate advertised information */
1609 if((h0->current_hop_limit && radv_info->curr_hop_limit) &&
1610 (h0->current_hop_limit != radv_info->curr_hop_limit))
1612 ip6_neighbor_syslog(vm, LOG_WARNING,
1613 "our AdvCurHopLimit on %U doesn't agree with %U",
1614 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1617 if((h0->flags & ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP) !=
1618 radv_info->adv_managed_flag)
1620 ip6_neighbor_syslog(vm, LOG_WARNING,
1621 "our AdvManagedFlag on %U doesn't agree with %U",
1622 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1625 if((h0->flags & ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP) !=
1626 radv_info->adv_other_flag)
1628 ip6_neighbor_syslog(vm, LOG_WARNING,
1629 "our AdvOtherConfigFlag on %U doesn't agree with %U",
1630 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1633 if((h0->time_in_msec_between_retransmitted_neighbor_solicitations &&
1634 radv_info->adv_time_in_msec_between_retransmitted_neighbor_solicitations) &&
1635 (h0->time_in_msec_between_retransmitted_neighbor_solicitations !=
1636 clib_host_to_net_u32(radv_info->adv_time_in_msec_between_retransmitted_neighbor_solicitations)))
1638 ip6_neighbor_syslog(vm, LOG_WARNING,
1639 "our AdvRetransTimer on %U doesn't agree with %U",
1640 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1643 if((h0->neighbor_reachable_time_in_msec &&
1644 radv_info->adv_neighbor_reachable_time_in_msec) &&
1645 (h0->neighbor_reachable_time_in_msec !=
1646 clib_host_to_net_u32(radv_info->adv_neighbor_reachable_time_in_msec)))
1648 ip6_neighbor_syslog(vm, LOG_WARNING,
1649 "our AdvReachableTime on %U doesn't agree with %U",
1650 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1653 /* check for MTU or prefix options or .. */
1654 u8 * opt_hdr = (u8 *)(h0 + 1);
1655 while( options_len0 > 0)
1657 icmp6_neighbor_discovery_option_header_t *o0 = ( icmp6_neighbor_discovery_option_header_t *)opt_hdr;
1658 int opt_len = o0->n_data_u64s << 3;
1659 icmp6_neighbor_discovery_option_type_t option_type = o0->type;
1661 if(options_len0 < 2)
1663 ip6_neighbor_syslog(vm, LOG_ERR,
1664 "malformed RA packet on %U from %U",
1665 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1671 ip6_neighbor_syslog(vm, LOG_ERR,
1672 " zero length option in RA on %U from %U",
1673 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1676 else if( opt_len > options_len0)
1678 ip6_neighbor_syslog(vm, LOG_ERR,
1679 "option length in RA packet greater than total length on %U from %U",
1680 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1684 options_len0 -= opt_len;
1689 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu:
1691 icmp6_neighbor_discovery_mtu_option_t *h =
1692 (icmp6_neighbor_discovery_mtu_option_t *)(o0);
1694 if(opt_len < sizeof(*h))
1697 if((h->mtu && radv_info->adv_link_mtu) &&
1698 (h->mtu != clib_host_to_net_u32(radv_info->adv_link_mtu)))
1700 ip6_neighbor_syslog(vm, LOG_WARNING,
1701 "our AdvLinkMTU on %U doesn't agree with %U",
1702 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1707 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information:
1709 icmp6_neighbor_discovery_prefix_information_option_t *h =
1710 (icmp6_neighbor_discovery_prefix_information_option_t *)(o0);
1712 /* validate advertised prefix options */
1713 ip6_radv_prefix_t *pr_info;
1714 u32 preferred, valid;
1716 if(opt_len < sizeof(*h))
1719 preferred = clib_net_to_host_u32(h->preferred_time);
1720 valid = clib_net_to_host_u32(h->valid_time);
1722 /* look for matching prefix - if we our advertising it, it better be consistant */
1723 pool_foreach (pr_info, radv_info->adv_prefixes_pool, ({
1726 ip6_address_mask_from_width(&mask, pr_info->prefix_len);
1728 if(pr_info->enabled &&
1729 (pr_info->prefix_len == h->dst_address_length) &&
1730 ip6_address_is_equal_masked (&pr_info->prefix, &h->dst_address, &mask))
1733 if(!pr_info->decrement_lifetime_flag &&
1734 valid != pr_info->adv_valid_lifetime_in_secs)
1736 ip6_neighbor_syslog(vm, LOG_WARNING,
1737 "our ADV validlifetime on %U for %U does not agree with %U",
1738 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
1739 format_ip6_address, &h->dst_address);
1741 if(!pr_info->decrement_lifetime_flag &&
1742 preferred != pr_info->adv_pref_lifetime_in_secs)
1744 ip6_neighbor_syslog(vm, LOG_WARNING,
1745 "our ADV preferredlifetime on %U for %U does not agree with %U",
1746 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
1747 format_ip6_address, &h->dst_address);
1763 p0->error = error_node->errors[error0];
1765 if(error0 != ICMP6_ERROR_NONE)
1766 vlib_error_count (vm, error_node->node_index, error0, 1);
1768 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1769 to_next, n_left_to_next,
1773 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1776 /* Account for router advertisements sent. */
1777 vlib_error_count (vm, error_node->node_index, ICMP6_ERROR_ROUTER_ADVERTISEMENTS_RX, n_advertisements_rcvd);
1779 return frame->n_vectors;
1782 /* create and initialize router advertisement parameters with default values for this intfc */
1784 ip6_neighbor_sw_interface_add_del (vnet_main_t * vnm,
1788 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
1791 vnet_sw_interface_t * sw_if0;
1792 ethernet_interface_t * eth_if0 = 0;
1794 /* lookup radv container - ethernet interfaces only */
1795 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
1796 if(sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
1797 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1802 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
1803 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
1807 a = pool_elt_at_index (nm->if_radv_pool, ri);
1811 u32 i, * to_delete = 0;
1812 ip6_radv_prefix_t *p;
1813 ip6_mldp_group_t *m;
1815 /* remove adjacencies */
1816 adj_unlock(a->all_nodes_adj_index);
1817 adj_unlock(a->all_routers_adj_index);
1818 adj_unlock(a->all_mldv2_routers_adj_index);
1820 /* clean up prefix_pool */
1821 pool_foreach (p, a->adv_prefixes_pool, ({
1822 vec_add1 (to_delete, p - a->adv_prefixes_pool);
1825 for (i = 0; i < vec_len (to_delete); i++)
1827 p = pool_elt_at_index (a->adv_prefixes_pool, to_delete[i]);
1828 mhash_unset (&a->address_to_prefix_index, &p->prefix, 0);
1829 pool_put (a->adv_prefixes_pool, p);
1832 vec_free (to_delete);
1835 /* clean up mldp group pool */
1836 pool_foreach (m, a->mldp_group_pool, ({
1837 vec_add1 (to_delete, m - a->mldp_group_pool);
1840 for (i = 0; i < vec_len (to_delete); i++)
1842 m = pool_elt_at_index (a->mldp_group_pool, to_delete[i]);
1843 mhash_unset (&a->address_to_mldp_index, &m->mcast_address, 0);
1844 pool_put (a->mldp_group_pool, m);
1847 vec_free (to_delete);
1849 pool_put (nm->if_radv_pool, a);
1850 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ~0;
1858 vnet_hw_interface_t * hw_if0;
1860 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index);
1862 pool_get (nm->if_radv_pool, a);
1864 ri = a - nm->if_radv_pool;
1865 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ri;
1867 /* initialize default values (most of which are zero) */
1868 memset (a, 0, sizeof (a[0]));
1870 a->sw_if_index = sw_if_index;
1872 a->max_radv_interval = DEF_MAX_RADV_INTERVAL;
1873 a->min_radv_interval = DEF_MIN_RADV_INTERVAL;
1874 a->curr_hop_limit = DEF_CURR_HOP_LIMIT;
1875 a->adv_router_lifetime_in_sec = DEF_DEF_RTR_LIFETIME;
1877 a->adv_link_layer_address = 1; /* send ll address source address option */
1879 a->min_delay_between_radv = MIN_DELAY_BETWEEN_RAS;
1880 a->max_delay_between_radv = MAX_DELAY_BETWEEN_RAS;
1881 a->max_rtr_default_lifetime = MAX_DEF_RTR_LIFETIME;
1882 a->seed = (u32) clib_cpu_time_now();
1883 (void) random_u32 (&a->seed);
1884 a->randomizer = clib_cpu_time_now();
1885 (void) random_u64 (&a->randomizer);
1887 a->initial_adverts_count = MAX_INITIAL_RTR_ADVERTISEMENTS ;
1888 a->initial_adverts_sent = a->initial_adverts_count-1;
1889 a->initial_adverts_interval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
1891 /* deafult is to send */
1894 /* fill in radv_info for this interface that will be needed later */
1895 a->adv_link_mtu = hw_if0->max_l3_packet_bytes[VLIB_RX];
1897 clib_memcpy (a->link_layer_address, eth_if0->address, 6);
1899 /* fill in default link-local address (this may be overridden) */
1900 ip6_link_local_address_from_ethernet_address (&a->link_local_address, eth_if0->address);
1901 a->link_local_prefix_len = 64;
1903 mhash_init (&a->address_to_prefix_index, sizeof (uword), sizeof (ip6_address_t));
1904 mhash_init (&a->address_to_mldp_index, sizeof (uword), sizeof (ip6_address_t));
1907 u8 link_layer_address[6] =
1908 {0x33, 0x33, 0x00, 0x00, 0x00, IP6_MULTICAST_GROUP_ID_all_hosts};
1910 a->all_nodes_adj_index = adj_rewrite_add_and_lock(FIB_PROTOCOL_IP6,
1913 link_layer_address);
1917 u8 link_layer_address[6] =
1918 {0x33, 0x33, 0x00, 0x00, 0x00, IP6_MULTICAST_GROUP_ID_all_routers};
1920 a->all_routers_adj_index = adj_rewrite_add_and_lock(FIB_PROTOCOL_IP6,
1923 link_layer_address);
1927 u8 link_layer_address[6] =
1928 {0x33, 0x33, 0x00, 0x00, 0x00, IP6_MULTICAST_GROUP_ID_mldv2_routers};
1930 a->all_mldv2_routers_adj_index =
1931 adj_rewrite_add_and_lock(FIB_PROTOCOL_IP6,
1934 link_layer_address);
1937 /* add multicast groups we will always be reporting */
1939 ip6_mldp_group_t *mcast_group_info;
1941 ip6_set_reserved_multicast_address (&addr,
1942 IP6_MULTICAST_SCOPE_link_local,
1943 IP6_MULTICAST_GROUP_ID_all_hosts);
1945 /* lookup mldp info for this interface */
1947 uword * p = mhash_get (&a->address_to_mldp_index, &addr);
1948 mcast_group_info = p ? pool_elt_at_index (a->mldp_group_pool, p[0]) : 0;
1951 if(!mcast_group_info)
1955 pool_get (a->mldp_group_pool, mcast_group_info);
1957 mi = mcast_group_info - a->mldp_group_pool;
1958 mhash_set (&a->address_to_mldp_index, &addr, mi, /* old_value */ 0);
1960 mcast_group_info->type = 4;
1961 mcast_group_info->mcast_source_address_pool = 0;
1962 mcast_group_info->num_sources = 0;
1963 clib_memcpy(&mcast_group_info->mcast_address, &addr, sizeof(ip6_address_t));
1966 ip6_set_reserved_multicast_address (&addr,
1967 IP6_MULTICAST_SCOPE_link_local,
1968 IP6_MULTICAST_GROUP_ID_all_routers);
1970 p = mhash_get (&a->address_to_mldp_index, &addr);
1971 mcast_group_info = p ? pool_elt_at_index (a->mldp_group_pool, p[0]) : 0;
1973 if(!mcast_group_info)
1977 pool_get (a->mldp_group_pool, mcast_group_info);
1979 mi = mcast_group_info - a->mldp_group_pool;
1980 mhash_set (&a->address_to_mldp_index, &addr, mi, /* old_value */ 0);
1982 mcast_group_info->type = 4;
1983 mcast_group_info->mcast_source_address_pool = 0;
1984 mcast_group_info->num_sources = 0;
1985 clib_memcpy(&mcast_group_info->mcast_address, &addr, sizeof(ip6_address_t));
1988 ip6_set_reserved_multicast_address (&addr,
1989 IP6_MULTICAST_SCOPE_link_local,
1990 IP6_MULTICAST_GROUP_ID_mldv2_routers);
1992 p = mhash_get (&a->address_to_mldp_index, &addr);
1993 mcast_group_info = p ? pool_elt_at_index (a->mldp_group_pool, p[0]) : 0;
1995 if(!mcast_group_info)
1999 pool_get (a->mldp_group_pool, mcast_group_info);
2001 mi = mcast_group_info - a->mldp_group_pool;
2002 mhash_set (&a->address_to_mldp_index, &addr, mi, /* old_value */ 0);
2004 mcast_group_info->type = 4;
2005 mcast_group_info->mcast_source_address_pool = 0;
2006 mcast_group_info->num_sources = 0;
2007 clib_memcpy(&mcast_group_info->mcast_address, &addr, sizeof(ip6_address_t));
2014 /* send an mldpv2 report */
2016 ip6_neighbor_send_mldpv2_report(u32 sw_if_index)
2018 vnet_main_t * vnm = vnet_get_main();
2019 vlib_main_t * vm = vnm->vlib_main;
2020 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
2021 vnet_sw_interface_t * sw_if0;
2022 ethernet_interface_t * eth_if0;
2026 ip6_radv_t *radv_info;
2036 icmp6_multicast_listener_report_header_t *rh0;
2037 icmp6_multicast_listener_report_packet_t *rp0;
2039 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2040 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
2041 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2043 if (!eth_if0 || !vnet_sw_interface_is_admin_up (vnm, sw_if_index))
2046 /* look up the radv_t information for this interface */
2047 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
2049 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2054 /* send report now - build a mldpv2 report packet */
2055 n_allocated = vlib_buffer_alloc_from_free_list(vm,
2058 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2059 if (PREDICT_FALSE(n_allocated == 0))
2061 clib_warning ("buffer allocation failure");
2065 b0 = vlib_get_buffer (vm, bo0);
2067 /* adjust the sizeof the buffer to just include the ipv6 header */
2068 b0->current_length = sizeof(icmp6_multicast_listener_report_packet_t);
2070 payload_length = sizeof(icmp6_multicast_listener_report_header_t);
2072 b0->error = ICMP6_ERROR_NONE;
2074 rp0 = vlib_buffer_get_current (b0);
2075 ip0 = (ip6_header_t *)&rp0-> ip;
2076 rh0 = (icmp6_multicast_listener_report_header_t *)&rp0-> report_hdr;
2078 memset (rp0 , 0x0, sizeof (icmp6_multicast_listener_report_packet_t));
2080 ip0->ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2082 ip0->protocol = IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS;
2083 /* for DEBUG - vnet driver won't seem to emit router alerts */
2084 /* ip0->protocol = IP_PROTOCOL_ICMP6; */
2087 rh0->icmp.type = ICMP6_multicast_listener_report_v2;
2089 /* source address MUST be the link-local address */
2090 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2091 ip0->src_address = radv_info->link_local_address;
2093 /* destination is all mldpv2 routers */
2094 ip6_set_reserved_multicast_address(&ip0->dst_address,
2095 IP6_MULTICAST_SCOPE_link_local,
2096 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2098 /* add reports here */
2099 ip6_mldp_group_t *m;
2100 int num_addr_records = 0;
2101 icmp6_multicast_address_record_t rr;
2103 /* fill in the hop-by-hop extension header (router alert) info */
2104 rh0->ext_hdr.next_hdr = IP_PROTOCOL_ICMP6;
2105 rh0->ext_hdr.n_data_u64s = 0;
2107 rh0->alert.type = IP6_MLDP_ALERT_TYPE;
2109 rh0->alert.value = 0;
2114 rh0->icmp.checksum = 0;
2116 pool_foreach (m, radv_info->mldp_group_pool, ({
2119 rr.aux_data_len_u32s = 0;
2120 rr.num_sources = clib_host_to_net_u16 (m->num_sources);
2121 clib_memcpy(&rr.mcast_addr, &m->mcast_address, sizeof(ip6_address_t));
2125 vlib_buffer_add_data (vm,
2126 b0->free_list_index,
2128 (void *)&rr, sizeof(icmp6_multicast_address_record_t));
2130 payload_length += sizeof( icmp6_multicast_address_record_t);
2134 rh0->num_addr_records = clib_host_to_net_u16(num_addr_records);
2136 /* update lengths */
2137 ip0->payload_length = clib_host_to_net_u16 (payload_length);
2139 rh0->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0,
2141 ASSERT(bogus_length == 0);
2144 * OK to override w/ no regard for actual FIB, because
2145 * ip6-rewrite-local only looks at the adjacency.
2147 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
2148 vnet_main.local_interface_sw_if_index;
2150 vnet_buffer (b0)->ip.adj_index[VLIB_RX] =
2151 radv_info->all_mldv2_routers_adj_index;
2153 vlib_node_t * node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite-local");
2155 f = vlib_get_frame_to_node (vm, node->index);
2156 to_next = vlib_frame_vector_args (f);
2160 vlib_put_frame_to_node (vm, node->index, f);
2164 VLIB_REGISTER_NODE (ip6_icmp_router_solicitation_node,static) = {
2165 .function = icmp6_router_solicitation,
2166 .name = "icmp6-router-solicitation",
2168 .vector_size = sizeof (u32),
2170 .format_trace = format_icmp6_input_trace,
2172 .n_next_nodes = ICMP6_ROUTER_SOLICITATION_N_NEXT,
2174 [ICMP6_ROUTER_SOLICITATION_NEXT_DROP] = "error-drop",
2175 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW] = "ip6-rewrite-local",
2176 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX] = "interface-output",
2180 /* send a RA or update the timer info etc.. */
2182 ip6_neighbor_process_timer_event (vlib_main_t * vm,
2183 vlib_node_runtime_t * node,
2184 vlib_frame_t * frame)
2186 vnet_main_t * vnm = vnet_get_main();
2187 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
2188 ip6_radv_t *radv_info;
2189 vlib_frame_t * f = 0;
2190 u32 n_this_frame = 0;
2191 u32 n_left_to_next = 0;
2194 icmp6_router_solicitation_header_t * h0;
2196 f64 now = vlib_time_now (vm);
2198 /* Interface ip6 radv info list */
2199 pool_foreach (radv_info, nm->if_radv_pool, ({
2201 if( !vnet_sw_interface_is_admin_up (vnm, radv_info->sw_if_index))
2203 radv_info->initial_adverts_sent = radv_info->initial_adverts_count-1;
2204 radv_info->next_multicast_time = now;
2205 radv_info->last_multicast_time = now;
2206 radv_info->last_radv_time = 0;
2207 radv_info->all_routers_mcast = 0;
2211 /* Make sure that we've joined the all-routers multicast group */
2212 if(!radv_info->all_routers_mcast)
2214 /* send MDLP_REPORT_EVENT message */
2215 ip6_neighbor_send_mldpv2_report(radv_info->sw_if_index);
2216 radv_info->all_routers_mcast = 1;
2219 /* is it time to send a multicast RA on this interface? */
2220 if(radv_info->send_radv && (now >= radv_info->next_multicast_time))
2225 f64 rfn = (radv_info->max_radv_interval - radv_info->min_radv_interval) *
2226 random_f64 (&radv_info->seed) + radv_info->min_radv_interval;
2228 /* multicast send - compute next multicast send time */
2229 if( radv_info->initial_adverts_sent > 0)
2231 radv_info->initial_adverts_sent--;
2232 if(rfn > radv_info-> initial_adverts_interval)
2233 rfn = radv_info-> initial_adverts_interval;
2235 /* check to see if we are ceasing to send */
2236 if( radv_info->initial_adverts_sent == 0)
2237 if(radv_info->cease_radv)
2238 radv_info->send_radv = 0;
2241 radv_info->next_multicast_time = rfn + now;
2242 radv_info->last_multicast_time = now;
2244 /* send advert now - build a "solicted" router advert with unspecified source address */
2245 n_allocated = vlib_buffer_alloc_from_free_list(vm,
2248 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2250 if (PREDICT_FALSE(n_allocated == 0))
2252 clib_warning ("buffer allocation failure");
2255 b0 = vlib_get_buffer (vm, bo0);
2256 b0->current_length = sizeof( icmp6_router_solicitation_header_t);
2257 b0->error = ICMP6_ERROR_NONE;
2258 vnet_buffer (b0)->sw_if_index[VLIB_RX] = radv_info->sw_if_index;
2260 h0 = vlib_buffer_get_current (b0);
2262 memset (h0, 0, sizeof (icmp6_router_solicitation_header_t));
2264 h0->ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2265 h0->ip.payload_length = clib_host_to_net_u16 (sizeof (icmp6_router_solicitation_header_t)
2266 - STRUCT_OFFSET_OF (icmp6_router_solicitation_header_t, neighbor));
2267 h0->ip.protocol = IP_PROTOCOL_ICMP6;
2268 h0->ip.hop_limit = 255;
2270 /* set src/dst address as "unspecified" this marks this packet as internally generated rather than recieved */
2271 h0->ip.src_address.as_u64[0] = 0;
2272 h0->ip.src_address.as_u64[1] = 0;
2274 h0->ip.dst_address.as_u64[0] = 0;
2275 h0->ip.dst_address.as_u64[1] = 0;
2277 h0->neighbor.icmp.type = ICMP6_router_solicitation;
2279 if (PREDICT_FALSE(f == 0))
2281 f = vlib_get_frame_to_node (vm, ip6_icmp_router_solicitation_node.index);
2282 to_next = vlib_frame_vector_args (f);
2283 n_left_to_next = VLIB_FRAME_SIZE;
2292 if (PREDICT_FALSE(n_left_to_next == 0))
2294 f->n_vectors = n_this_frame;
2295 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2303 ASSERT(n_this_frame);
2304 f->n_vectors = n_this_frame;
2305 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2311 ip6_icmp_neighbor_discovery_event_process (vlib_main_t * vm,
2312 vlib_node_runtime_t * node,
2313 vlib_frame_t * frame)
2316 ip6_icmp_neighbor_discovery_event_data_t * event_data;
2318 /* init code here */
2322 vlib_process_wait_for_event_or_clock (vm, 1. /* seconds */);
2324 event_data = vlib_process_get_event_data (vm, &event_type);
2328 /* No events found: timer expired. */
2329 /* process interface list and send RAs as appropriate, update timer info */
2330 ip6_neighbor_process_timer_event (vm, node, frame);
2334 switch (event_type) {
2336 case ICMP6_ND_EVENT_INIT:
2347 _vec_len (event_data) = 0;
2350 return frame->n_vectors;
2353 VLIB_REGISTER_NODE (ip6_icmp_router_advertisement_node,static) = {
2354 .function = icmp6_router_advertisement,
2355 .name = "icmp6-router-advertisement",
2357 .vector_size = sizeof (u32),
2359 .format_trace = format_icmp6_input_trace,
2367 vlib_node_registration_t ip6_icmp_neighbor_discovery_event_node = {
2369 .function = ip6_icmp_neighbor_discovery_event_process,
2370 .name = "ip6-icmp-neighbor-discovery-event-process",
2371 .type = VLIB_NODE_TYPE_PROCESS,
2375 icmp6_neighbor_solicitation (vlib_main_t * vm,
2376 vlib_node_runtime_t * node,
2377 vlib_frame_t * frame)
2378 { return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame, /* is_solicitation */ 1); }
2381 icmp6_neighbor_advertisement (vlib_main_t * vm,
2382 vlib_node_runtime_t * node,
2383 vlib_frame_t * frame)
2384 { return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame, /* is_solicitation */ 0); }
2386 VLIB_REGISTER_NODE (ip6_icmp_neighbor_solicitation_node,static) = {
2387 .function = icmp6_neighbor_solicitation,
2388 .name = "icmp6-neighbor-solicitation",
2390 .vector_size = sizeof (u32),
2392 .format_trace = format_icmp6_input_trace,
2394 .n_next_nodes = ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
2396 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP] = "error-drop",
2397 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY] = "interface-output",
2401 VLIB_REGISTER_NODE (ip6_icmp_neighbor_advertisement_node,static) = {
2402 .function = icmp6_neighbor_advertisement,
2403 .name = "icmp6-neighbor-advertisement",
2405 .vector_size = sizeof (u32),
2407 .format_trace = format_icmp6_input_trace,
2415 /* API support functions */
2417 ip6_neighbor_ra_config(vlib_main_t * vm, u32 sw_if_index,
2418 u8 suppress, u8 managed, u8 other,
2419 u8 ll_option, u8 send_unicast, u8 cease,
2420 u8 use_lifetime, u32 lifetime,
2421 u32 initial_count, u32 initial_interval,
2422 u32 max_interval, u32 min_interval,
2425 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
2429 /* look up the radv_t information for this interface */
2430 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
2431 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2432 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
2437 ip6_radv_t * radv_info;
2438 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2440 if((max_interval != 0) && (min_interval ==0))
2441 min_interval = .75 * max_interval;
2443 max_interval = (max_interval != 0) ? ( (is_no) ? DEF_MAX_RADV_INTERVAL : max_interval) : radv_info->max_radv_interval;
2444 min_interval = (min_interval != 0) ? ( (is_no) ? DEF_MIN_RADV_INTERVAL : min_interval) : radv_info->min_radv_interval;
2445 lifetime = (use_lifetime != 0) ? ( (is_no) ? DEF_DEF_RTR_LIFETIME : lifetime) : radv_info->adv_router_lifetime_in_sec;
2449 if(lifetime > MAX_DEF_RTR_LIFETIME)
2450 lifetime = MAX_DEF_RTR_LIFETIME;
2452 if(lifetime <= max_interval)
2453 return VNET_API_ERROR_INVALID_VALUE;
2456 if(min_interval != 0)
2458 if((min_interval > .75 * max_interval) ||
2460 return VNET_API_ERROR_INVALID_VALUE;
2463 if((initial_count > MAX_INITIAL_RTR_ADVERTISEMENTS) ||
2464 (initial_interval > MAX_INITIAL_RTR_ADVERT_INTERVAL))
2465 return VNET_API_ERROR_INVALID_VALUE;
2468 if "flag" is set and is_no is true then restore default value else set value corresponding to "flag"
2469 if "flag" is clear don't change corresponding value
2471 radv_info->send_radv = (suppress != 0) ? ( (is_no != 0) ? 1 : 0 ) : radv_info->send_radv;
2472 radv_info->adv_managed_flag = ( managed != 0) ? ( (is_no) ? 0 : 1) : radv_info->adv_managed_flag;
2473 radv_info->adv_other_flag = (other != 0) ? ( (is_no) ? 0: 1) : radv_info->adv_other_flag;
2474 radv_info->adv_link_layer_address = ( ll_option != 0) ? ( (is_no) ? 1 : 0) : radv_info->adv_link_layer_address;
2475 radv_info->send_unicast = (send_unicast != 0) ? ( (is_no) ? 0 : 1) : radv_info->send_unicast;
2476 radv_info->cease_radv = ( cease != 0) ? ( (is_no) ? 0 : 1) : radv_info->cease_radv;
2478 radv_info->min_radv_interval = min_interval;
2479 radv_info->max_radv_interval = max_interval;
2480 radv_info->adv_router_lifetime_in_sec = lifetime;
2482 radv_info->initial_adverts_count =
2483 (initial_count != 0) ? ( (is_no) ? MAX_INITIAL_RTR_ADVERTISEMENTS : initial_count) : radv_info->initial_adverts_count ;
2484 radv_info->initial_adverts_interval =
2485 (initial_interval != 0) ? ( (is_no) ? MAX_INITIAL_RTR_ADVERT_INTERVAL : initial_interval) : radv_info->initial_adverts_interval;
2488 if((cease != 0) && (is_no))
2489 radv_info-> send_radv = 1;
2491 radv_info->initial_adverts_sent = radv_info->initial_adverts_count -1;
2492 radv_info->next_multicast_time = vlib_time_now (vm);
2493 radv_info->last_multicast_time = vlib_time_now (vm);
2494 radv_info->last_radv_time = 0;
2500 ip6_neighbor_ra_prefix(vlib_main_t * vm, u32 sw_if_index,
2501 ip6_address_t *prefix_addr, u8 prefix_len,
2502 u8 use_default, u32 val_lifetime, u32 pref_lifetime,
2503 u8 no_advertise, u8 off_link, u8 no_autoconfig, u8 no_onlink,
2506 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
2511 /* look up the radv_t information for this interface */
2512 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
2514 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2516 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
2520 f64 now = vlib_time_now (vm);
2521 ip6_radv_t * radv_info;
2522 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2524 /* prefix info add, delete or update */
2525 ip6_radv_prefix_t * prefix;
2527 /* lookup prefix info for this address on this interface */
2528 uword * p = mhash_get (&radv_info->address_to_prefix_index, prefix_addr);
2530 prefix = p ? pool_elt_at_index (radv_info->adv_prefixes_pool, p[0]) : 0;
2536 return VNET_API_ERROR_INVALID_VALUE; /* invalid prefix */
2538 if(prefix->prefix_len != prefix_len)
2539 return VNET_API_ERROR_INVALID_VALUE_2;
2541 /* FIXME - Should the DP do this or the CP ?*/
2542 /* do specific delete processing here before returning */
2543 /* try to remove from routing table */
2545 mhash_unset (&radv_info->address_to_prefix_index, prefix_addr,/* old_value */ 0);
2546 pool_put (radv_info->adv_prefixes_pool, prefix);
2548 radv_info->initial_adverts_sent = radv_info->initial_adverts_count -1;
2549 radv_info->next_multicast_time = vlib_time_now (vm);
2550 radv_info->last_multicast_time = vlib_time_now (vm);
2551 radv_info->last_radv_time = 0;
2555 /* adding or changing */
2560 pool_get (radv_info->adv_prefixes_pool, prefix);
2561 pi = prefix - radv_info->adv_prefixes_pool;
2562 mhash_set (&radv_info->address_to_prefix_index, prefix_addr, pi, /* old_value */ 0);
2564 memset(prefix, 0x0, sizeof(ip6_radv_prefix_t));
2566 prefix->prefix_len = prefix_len;
2567 clib_memcpy(&prefix->prefix, prefix_addr, sizeof(ip6_address_t));
2569 /* initialize default values */
2570 prefix->adv_on_link_flag = 1; /* L bit set */
2571 prefix->adv_autonomous_flag = 1; /* A bit set */
2572 prefix->adv_valid_lifetime_in_secs = DEF_ADV_VALID_LIFETIME;
2573 prefix->adv_pref_lifetime_in_secs = DEF_ADV_PREF_LIFETIME;
2574 prefix->enabled = 1;
2575 prefix->decrement_lifetime_flag = 1;
2576 prefix->deprecated_prefix_flag = 1;
2580 /* FIXME - Should the DP do this or the CP ?*/
2581 /* insert prefix into routing table as a connected prefix */
2590 if(prefix->prefix_len != prefix_len)
2591 return VNET_API_ERROR_INVALID_VALUE_2;
2595 /* FIXME - Should the DP do this or the CP ?*/
2596 /* remove from routing table if already there */
2600 if((val_lifetime == ~0) || (pref_lifetime == ~0))
2602 prefix->adv_valid_lifetime_in_secs = ~0;
2603 prefix->adv_pref_lifetime_in_secs = ~0;
2604 prefix->decrement_lifetime_flag = 0;
2608 prefix->adv_valid_lifetime_in_secs = val_lifetime;;
2609 prefix->adv_pref_lifetime_in_secs = pref_lifetime;
2612 /* copy remaining */
2613 prefix->enabled = !(no_advertise != 0);
2614 prefix->adv_on_link_flag = !((off_link != 0) || (no_onlink != 0));
2615 prefix->adv_autonomous_flag = !(no_autoconfig != 0);
2619 /* fill in the expiration times */
2620 prefix->valid_lifetime_expires = now + prefix->adv_valid_lifetime_in_secs;
2621 prefix->pref_lifetime_expires = now + prefix->adv_pref_lifetime_in_secs;
2623 radv_info->initial_adverts_sent = radv_info->initial_adverts_count -1;
2624 radv_info->next_multicast_time = vlib_time_now (vm);
2625 radv_info->last_multicast_time = vlib_time_now (vm);
2626 radv_info->last_radv_time = 0;
2632 ip6_neighbor_cmd(vlib_main_t * vm, unformat_input_t * main_input, vlib_cli_command_t * cmd)
2634 vnet_main_t * vnm = vnet_get_main();
2635 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
2636 clib_error_t * error = 0;
2638 u8 suppress = 0, managed = 0, other = 0;
2639 u8 suppress_ll_option = 0, send_unicast = 0, cease= 0;
2640 u8 use_lifetime = 0;
2641 u32 sw_if_index, ra_lifetime = 0, ra_initial_count = 0, ra_initial_interval = 0;
2642 u32 ra_max_interval = 0 , ra_min_interval = 0;
2644 unformat_input_t _line_input, * line_input = &_line_input;
2645 vnet_sw_interface_t * sw_if0;
2647 int add_radv_info = 1;
2648 __attribute__((unused)) ip6_radv_t * radv_info = 0;
2649 ip6_address_t ip6_addr;
2653 /* Get a line of input. */
2654 if (! unformat_user (main_input, unformat_line_input, line_input))
2657 /* get basic radv info for this interface */
2658 if(unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2661 if (unformat_user (line_input,
2662 unformat_vnet_sw_interface, vnm, &sw_if_index))
2665 ethernet_interface_t * eth_if0 = 0;
2667 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2668 if(sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2669 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2673 error = clib_error_return (0, "Interface must be of ethernet type");
2677 /* look up the radv_t information for this interface */
2678 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
2680 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2684 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2688 error = clib_error_return (0, "unknown interface %U'",
2689 format_unformat_error, line_input);
2695 error = clib_error_return (0, "invalid interface name %U'",
2696 format_unformat_error, line_input);
2701 /* get the rest of the command */
2702 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2704 if (unformat (line_input, "no"))
2706 else if(unformat (line_input, "prefix %U/%d",
2707 unformat_ip6_address, &ip6_addr,
2713 else if (unformat (line_input, "ra-managed-config-flag"))
2718 else if (unformat (line_input, "ra-other-config-flag"))
2723 else if (unformat (line_input, "ra-suppress") ||
2724 unformat (line_input, "ra-surpress"))
2729 else if (unformat (line_input, "ra-suppress-link-layer") ||
2730 unformat (line_input, "ra-surpress-link-layer"))
2732 suppress_ll_option = 1;
2735 else if (unformat (line_input, "ra-send-unicast"))
2740 else if (unformat (line_input, "ra-lifetime"))
2742 if (!unformat (line_input, "%d", &ra_lifetime))
2743 return(error = unformat_parse_error (line_input));
2747 else if (unformat (line_input, "ra-initial"))
2749 if (!unformat (line_input, "%d %d", &ra_initial_count, &ra_initial_interval))
2750 return(error = unformat_parse_error (line_input));
2753 else if (unformat (line_input, "ra-interval"))
2755 if (!unformat (line_input, "%d", &ra_max_interval))
2756 return(error = unformat_parse_error (line_input));
2758 if (!unformat (line_input, "%d", &ra_min_interval))
2759 ra_min_interval = 0;
2762 else if(unformat (line_input, "ra-cease"))
2768 return(unformat_parse_error (line_input));
2773 ip6_neighbor_ra_config(vm, sw_if_index,
2774 suppress, managed, other,
2775 suppress_ll_option, send_unicast, cease,
2776 use_lifetime, ra_lifetime,
2777 ra_initial_count, ra_initial_interval,
2778 ra_max_interval, ra_min_interval,
2783 u32 valid_lifetime_in_secs = 0;
2784 u32 pref_lifetime_in_secs = 0;
2785 u8 use_prefix_default_values = 0;
2786 u8 no_advertise = 0;
2788 u8 no_autoconfig = 0;
2791 /* get the rest of the command */
2792 while(unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2794 if(unformat (line_input, "default"))
2796 use_prefix_default_values = 1;
2799 else if(unformat (line_input, "infinite"))
2801 valid_lifetime_in_secs = ~0;
2802 pref_lifetime_in_secs = ~0;
2805 else if(unformat (line_input, "%d %d", &valid_lifetime_in_secs,
2806 &pref_lifetime_in_secs))
2813 /* get the rest of the command */
2814 while (!use_prefix_default_values &&
2815 unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2817 if(unformat (line_input, "no-advertise"))
2819 else if(unformat (line_input, "off-link"))
2821 else if(unformat (line_input, "no-autoconfig"))
2823 else if(unformat (line_input, "no-onlink"))
2826 return(unformat_parse_error (line_input));
2829 ip6_neighbor_ra_prefix(vm, sw_if_index,
2830 &ip6_addr, addr_len,
2831 use_prefix_default_values,
2832 valid_lifetime_in_secs,
2833 pref_lifetime_in_secs,
2841 unformat_free (line_input);
2848 ip6_print_addrs(vlib_main_t * vm,
2851 ip_lookup_main_t * lm = &ip6_main.lookup_main;
2854 for (i = 0; i < vec_len (addrs); i++)
2856 ip_interface_address_t * a = pool_elt_at_index(lm->if_address_pool, addrs[i]);
2857 ip6_address_t * address = ip_interface_address_get_address (lm, a);
2859 vlib_cli_output (vm, "\t\t%U/%d",
2860 format_ip6_address, address,
2865 static clib_error_t *
2866 show_ip6_interface_cmd (vlib_main_t * vm,
2867 unformat_input_t * input,
2868 vlib_cli_command_t * cmd)
2870 vnet_main_t * vnm = vnet_get_main();
2871 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
2872 clib_error_t * error = 0;
2877 if (unformat_user (input,
2878 unformat_vnet_sw_interface, vnm, &sw_if_index))
2882 /* look up the radv_t information for this interface */
2883 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
2885 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2889 ip_lookup_main_t * lm = &ip6_main.lookup_main;
2890 ip6_radv_t * radv_info;
2891 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2893 vlib_cli_output (vm, "%U is admin %s\n", format_vnet_sw_interface_name, vnm,
2894 vnet_get_sw_interface (vnm, sw_if_index),
2895 (vnet_sw_interface_is_admin_up (vnm, sw_if_index) ? "up" : "down"));
2898 u32 *link_scope = 0, *global_scope = 0;
2899 u32 *local_scope = 0, *unknown_scope = 0;
2900 ip_interface_address_t * a;
2902 vec_validate_init_empty (lm->if_address_pool_index_by_sw_if_index, sw_if_index, ~0);
2903 ai = lm->if_address_pool_index_by_sw_if_index[sw_if_index];
2905 while (ai != (u32)~0)
2907 a = pool_elt_at_index(lm->if_address_pool, ai);
2908 ip6_address_t * address = ip_interface_address_get_address (lm, a);
2910 if (ip6_address_is_link_local_unicast (address))
2911 vec_add1 (link_scope, ai);
2912 else if(ip6_address_is_global_unicast (address))
2913 vec_add1 (global_scope, ai);
2914 else if(ip6_address_is_local_unicast (address))
2915 vec_add1 (local_scope, ai);
2917 vec_add1 (unknown_scope, ai);
2919 ai = a->next_this_sw_interface;
2922 if (vec_len (link_scope))
2924 vlib_cli_output (vm, "\tLink-local address(es):\n");
2925 ip6_print_addrs (vm, link_scope);
2926 vec_free (link_scope);
2929 if (vec_len (local_scope))
2931 vlib_cli_output (vm, "\tLocal unicast address(es):\n");
2932 ip6_print_addrs (vm, local_scope);
2933 vec_free (local_scope);
2936 if (vec_len (global_scope))
2938 vlib_cli_output (vm, "\tGlobal unicast address(es):\n");
2939 ip6_print_addrs (vm, global_scope);
2940 vec_free (global_scope);
2943 if (vec_len (unknown_scope))
2945 vlib_cli_output (vm, "\tOther-scope address(es):\n");
2946 ip6_print_addrs (vm, unknown_scope);
2947 vec_free (unknown_scope);
2950 vlib_cli_output (vm, "\tJoined group address(es):\n");
2951 ip6_mldp_group_t *m;
2952 pool_foreach (m, radv_info->mldp_group_pool, ({
2953 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address, &m->mcast_address);
2956 vlib_cli_output (vm, "\tAdvertised Prefixes:\n");
2957 ip6_radv_prefix_t * p;
2958 pool_foreach (p, radv_info->adv_prefixes_pool, ({
2959 vlib_cli_output (vm, "\t\tprefix %U, length %d\n",
2960 format_ip6_address, &p->prefix, p->prefix_len);
2963 vlib_cli_output (vm, "\tMTU is %d\n", radv_info->adv_link_mtu);
2964 vlib_cli_output (vm, "\tICMP error messages are unlimited\n");
2965 vlib_cli_output (vm, "\tICMP redirects are disabled\n");
2966 vlib_cli_output (vm, "\tICMP unreachables are not sent\n");
2967 vlib_cli_output (vm, "\tND DAD is disabled\n");
2968 //vlib_cli_output (vm, "\tND reachable time is %d milliseconds\n",);
2969 vlib_cli_output (vm, "\tND advertised reachable time is %d\n",
2970 radv_info->adv_neighbor_reachable_time_in_msec);
2971 vlib_cli_output (vm, "\tND advertised retransmit interval is %d (msec)\n",
2972 radv_info->adv_time_in_msec_between_retransmitted_neighbor_solicitations);
2974 u32 ra_interval = radv_info->max_radv_interval;
2975 u32 ra_interval_min = radv_info->min_radv_interval;
2976 vlib_cli_output (vm, "\tND router advertisements are sent every %d seconds (min interval is %d)\n",
2977 ra_interval, ra_interval_min);
2978 vlib_cli_output (vm, "\tND router advertisements live for %d seconds\n",
2979 radv_info->adv_router_lifetime_in_sec);
2980 vlib_cli_output (vm, "\tHosts %s stateless autoconfig for addresses\n",
2981 (radv_info->adv_managed_flag) ? "use" :" don't use");
2982 vlib_cli_output (vm, "\tND router advertisements sent %d\n", radv_info->n_advertisements_sent);
2983 vlib_cli_output (vm, "\tND router solicitations received %d\n", radv_info->n_solicitations_rcvd);
2984 vlib_cli_output (vm, "\tND router solicitations dropped %d\n", radv_info->n_solicitations_dropped);
2988 error = clib_error_return (0, "IPv6 not enabled on interface",
2989 format_unformat_error, input);
2997 * This command is used to display various IPv6 attributes on a given
3001 * Example of how to display IPv6 settings:
3002 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
3003 * GigabitEthernet2/0/0 is admin up
3004 * Link-local address(es):
3006 * Joined group address(es):
3011 * Advertised Prefixes:
3012 * prefix fe80::fe:28ff:fe9c:75b3, length 64
3014 * ICMP error messages are unlimited
3015 * ICMP redirects are disabled
3016 * ICMP unreachables are not sent
3017 * ND DAD is disabled
3018 * ND advertised reachable time is 0
3019 * ND advertised retransmit interval is 0 (msec)
3020 * ND router advertisements are sent every 200 seconds (min interval is 150)
3021 * ND router advertisements live for 600 seconds
3022 * Hosts use stateless autoconfig for addresses
3023 * ND router advertisements sent 19336
3024 * ND router solicitations received 0
3025 * ND router solicitations dropped 0
3027 * Example of output if IPv6 is not enabled on the interface:
3028 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
3029 * show ip6 interface: IPv6 not enabled on interface
3033 VLIB_CLI_COMMAND (show_ip6_interface_command, static) = {
3034 .path = "show ip6 interface",
3035 .function = show_ip6_interface_cmd,
3036 .short_help = "show ip6 interface <interface>",
3041 disable_ip6_interface(vlib_main_t * vm,
3044 clib_error_t * error = 0;
3045 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3048 /* look up the radv_t information for this interface */
3049 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
3050 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3052 /* if not created - do nothing */
3055 vnet_main_t * vnm = vnet_get_main();
3056 ip6_radv_t * radv_info;
3058 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3060 /* check radv_info ref count for other ip6 addresses on this interface */
3061 if(radv_info->ref_count == 0 )
3063 /* essentially "disables" ipv6 on this interface */
3064 error = ip6_add_del_interface_address (vm, sw_if_index,
3065 &radv_info->link_local_address,
3066 radv_info->link_local_prefix_len,
3069 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, 0/* is_add */);
3076 ip6_interface_enabled(vlib_main_t * vm,
3079 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3082 /* look up the radv_t information for this interface */
3083 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
3085 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3091 enable_ip6_interface(vlib_main_t * vm,
3094 clib_error_t * error = 0;
3095 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3099 /* look up the radv_t information for this interface */
3100 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
3102 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3104 /* if not created yet */
3107 vnet_main_t * vnm = vnet_get_main();
3108 vnet_sw_interface_t * sw_if0;
3110 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
3111 if(sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
3113 ethernet_interface_t * eth_if0;
3115 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
3118 /* create radv_info. for this interface. This holds all the info needed for router adverts */
3119 ri = ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, is_add);
3123 ip6_radv_t * radv_info;
3124 ip6_address_t link_local_address;
3126 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3128 ip6_link_local_address_from_ethernet_mac_address (&link_local_address,
3131 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index);
3132 if(sw_if0->type == VNET_SW_INTERFACE_TYPE_SUB)
3134 /* make up an interface id */
3138 link_local_address.as_u64[0] = radv_info->randomizer;
3141 md5_add (&m, &link_local_address, 16);
3142 md5_finish (&m, digest);
3144 clib_memcpy(&link_local_address, digest, 16);
3146 radv_info->randomizer = link_local_address.as_u64[0];
3148 link_local_address.as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
3150 link_local_address.as_u8[8] &= 0xfd;
3153 /* essentially "enables" ipv6 on this interface */
3154 error = ip6_add_del_interface_address (vm, sw_if_index,
3155 &link_local_address,
3156 128 /* address width */,
3160 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, !is_add);
3163 radv_info->link_local_address = link_local_address;
3164 radv_info->link_local_prefix_len = 64;
3173 static clib_error_t *
3174 enable_ip6_interface_cmd (vlib_main_t * vm,
3175 unformat_input_t * input,
3176 vlib_cli_command_t * cmd)
3178 vnet_main_t * vnm = vnet_get_main();
3179 clib_error_t * error = 0;
3184 if (unformat_user (input,
3185 unformat_vnet_sw_interface, vnm, &sw_if_index))
3187 enable_ip6_interface(vm, sw_if_index);
3191 error = clib_error_return (0, "unknown interface\n'",
3192 format_unformat_error, input);
3199 * This command is used to enable IPv6 on a given interface.
3202 * Example of how enable IPv6 on a given interface:
3203 * @cliexcmd{enable ip6 interface GigabitEthernet2/0/0}
3206 VLIB_CLI_COMMAND (enable_ip6_interface_command, static) = {
3207 .path = "enable ip6 interface",
3208 .function = enable_ip6_interface_cmd,
3209 .short_help = "enable ip6 interface <interface>",
3213 static clib_error_t *
3214 disable_ip6_interface_cmd (vlib_main_t * vm,
3215 unformat_input_t * input,
3216 vlib_cli_command_t * cmd)
3218 vnet_main_t * vnm = vnet_get_main();
3219 clib_error_t * error = 0;
3224 if (unformat_user (input,
3225 unformat_vnet_sw_interface, vnm, &sw_if_index))
3227 error = disable_ip6_interface(vm, sw_if_index);
3231 error = clib_error_return (0, "unknown interface\n'",
3232 format_unformat_error, input);
3239 * This command is used to disable IPv6 on a given interface.
3242 * Example of how disable IPv6 on a given interface:
3243 * @cliexcmd{disable ip6 interface GigabitEthernet2/0/0}
3246 VLIB_CLI_COMMAND (disable_ip6_interface_command, static) = {
3247 .path = "disable ip6 interface",
3248 .function = disable_ip6_interface_cmd,
3249 .short_help = "disable ip6 interface <interface>",
3254 * This command is used to configure the neighbor discovery
3255 * parameters on a given interface. Use the '<em>show ip6 interface</em>'
3256 * command to display some of the current neighbor discovery parameters
3257 * on a given interface. This command has three formats:
3260 * <b>Format 1 - Router Advertisement Options:</b> (Only one can be entered in a single command)
3262 * '<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>'
3266 * <em>[no] ra-managed-config-flag</em> - Advertises in ICMPv6
3267 * router-advertisement messages to use stateful address
3268 * auto-configuration to obtain address information (sets the M-bit).
3269 * Default is the M-bit is not set and the '<em>no</em>' option
3270 * returns it to this default state.
3272 * <em>[no] ra-other-config-flag</em> - Indicates in ICMPv6
3273 * router-advertisement messages that hosts use stateful auto
3274 * configuration to obtain nonaddress related information (sets
3275 * the O-bit). Default is the O-bit is not set and the '<em>no</em>'
3276 * option returns it to this default state.
3278 * <em>[no] ra-suppress</em> - Disables sending ICMPv6 router-advertisement
3279 * messages. The '<em>no</em>' option implies to enable sending ICMPv6
3280 * router-advertisement messages.
3282 * <em>[no] ra-suppress-link-layer</em> - Indicates not to include the
3283 * optional source link-layer address in the ICMPv6 router-advertisement
3284 * messages. Default is to include the optional source link-layer address
3285 * and the '<em>no</em>' option returns it to this default state.
3287 * <em>[no] ra-send-unicast</em> - Use the source address of the
3288 * router-solicitation message if availiable. The default is to use
3289 * multicast address of all nodes, and the '<em>no</em>' option returns
3290 * it to this default state.
3292 * <em>[no] ra-lifetime <lifetime></em> - Advertises the lifetime of a
3293 * default router in ICMPv6 router-advertisement messages. The range is
3294 * from 0 to 9000 seconds. '<em><lifetime></em>' must be greater than
3295 * '<em><max-interval></em>'. The default value is 600 seconds and the
3296 * '<em>no</em>' option returns it to this default value.
3298 * <em>[no] ra-initial <cnt> <interval></em> - Number of initial ICMPv6
3299 * router-advertisement messages sent and the interval between each
3300 * message. Range for count is 1 - 3 and default is 3. Range for interval
3301 * is 1 to 16 seconds, and default is 16 seconds. The '<em>no</em>' option
3302 * returns both to their default value.
3304 * <em>[no] ra-interval <max-interval> [<min-interval>]</em> - Configures the
3305 * interval between sending ICMPv6 router-advertisement messages. The
3306 * range for max-interval is from 4 to 200 seconds. min-interval can not
3307 * be more than 75% of max-interval. If not set, min-interval will be
3308 * set to 75% of max-interval. The range for min-interval is from 3 to
3309 * 150 seconds. The '<em>no</em>' option returns both to their default
3312 * <em>[no] ra-cease</em> - Cease sending ICMPv6 router-advertisement messages.
3313 * The '<em>no</em>' options implies to start (or restart) sending
3314 * ICMPv6 router-advertisement messages.
3317 * <b>Format 2 - Prefix Options:</b>
3319 * '<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>'
3323 * <em>no</em> - All additional flags are ignored and the prefix is deleted.
3325 * <em><valid-lifetime> <pref-lifetime></em> - '<em><valid-lifetime></em>' is the
3326 * length of time in seconds during what the prefix is valid for the purpose of
3327 * on-link determination. Range is 7203 to 2592000 seconds and default is 2592000
3328 * seconds (30 days). '<em><pref-lifetime></em>' is the prefered-lifetime and is the
3329 * length of time in seconds during what addresses generated from the prefix remain
3330 * preferred. Range is 0 to 604800 seconds and default is 604800 seconds (7 days).
3332 * <em>infinite</em> - Both '<em><valid-lifetime></em>' and '<em><<pref-lifetime></em>'
3333 * are inifinte, no timeout.
3335 * <em>no-advertise</em> - Do not send full router address in prefix
3336 * advertisement. Default is to advertise (i.e. - This flag is off by default).
3338 * <em>off-link</em> - Prefix is off-link, clear L-bit in packet. Default is on-link
3339 * (i.e. - This flag is off and L-bit in packet is set by default and this prefix can
3340 * be used for on-link determination). '<em>no-onlink</em>' also controls the L-bit.
3342 * <em>no-autoconfig</em> - Do not use prefix for autoconfiguration, clear A-bit in packet.
3343 * Default is autoconfig (i.e. - This flag is off and A-bit in packet is set by default.
3345 * <em>no-onlink</em> - Do not use prefix for onlink determination, clear L-bit in packet.
3346 * Default is on-link (i.e. - This flag is off and L-bit in packet is set by default and
3347 * this prefix can be used for on-link determination). '<em>off-link</em>' also controls
3351 * <b>Format 3: - Default of Prefix:</b>
3353 * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> default</b></em>'
3355 * When a new prefix is added (or existing one is being overwritten) <em>default</em>
3356 * uses default values for the prefix. If <em>no</em> is used, the <em>default</em>
3357 * is ignored and the prefix is deleted.
3361 * Example of how set a router advertisement option:
3362 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 ra-interval 100 20}
3363 * Example of how to add a prefix:
3364 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 prefix fe80::fe:28ff:fe9c:75b3/64 infinite no-advertise}
3365 * Example of how to delete a prefix:
3366 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 no prefix fe80::fe:28ff:fe9c:75b3/64}
3369 VLIB_CLI_COMMAND (ip6_nd_command, static) = {
3371 .short_help = "ip6 nd <interface> ...",
3372 .function = ip6_neighbor_cmd,
3377 set_ip6_link_local_address(vlib_main_t * vm,
3379 ip6_address_t *address,
3382 clib_error_t * error = 0;
3383 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3385 ip6_radv_t * radv_info;
3386 vnet_main_t * vnm = vnet_get_main();
3388 if( !ip6_address_is_link_local_unicast (address))
3390 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_LINK_LOCAL;
3391 return(error = clib_error_return (0, "address not link-local",
3392 format_unformat_error));
3395 /* call enable ipv6 */
3396 enable_ip6_interface(vm, sw_if_index);
3398 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3402 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3404 /* save if link local address (overwrite default) */
3406 /* delete the old one */
3407 error = ip6_add_del_interface_address (vm, sw_if_index,
3408 &radv_info->link_local_address,
3409 radv_info->link_local_prefix_len /* address width */,
3414 /* add the new one */
3415 error = ip6_add_del_interface_address (vm, sw_if_index,
3417 address_length /* address width */,
3422 radv_info->link_local_address = *address;
3423 radv_info->link_local_prefix_len = address_length;
3429 vnm->api_errno = VNET_API_ERROR_IP6_NOT_ENABLED;
3430 error = clib_error_return (0, "ip6 not enabled for interface",
3431 format_unformat_error);
3437 set_ip6_link_local_address_cmd (vlib_main_t * vm,
3438 unformat_input_t * input,
3439 vlib_cli_command_t * cmd)
3441 vnet_main_t * vnm = vnet_get_main();
3442 clib_error_t * error = 0;
3444 ip6_address_t ip6_addr;
3447 if (unformat_user (input,
3448 unformat_vnet_sw_interface, vnm, &sw_if_index))
3450 /* get the rest of the command */
3451 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3453 if(unformat (input, "%U/%d",
3454 unformat_ip6_address, &ip6_addr,
3458 return(unformat_parse_error (input));
3461 error = set_ip6_link_local_address(vm,
3469 * This command is used to assign an IPv6 Link-local address to an
3470 * interface. This command will enable IPv6 on an interface if it
3471 * is not already enabled. Use the '<em>show ip6 interface</em>' command
3472 * to display the assigned Link-local address.
3475 * Example of how to assign an IPv6 Link-local address to an interface:
3476 * @cliexcmd{set ip6 link-local address GigabitEthernet2/0/0 FE80::AB8/64}
3479 VLIB_CLI_COMMAND (set_ip6_link_local_address_command, static) = {
3480 .path = "set ip6 link-local address",
3481 .short_help = "set ip6 link-local address <interface> <ip6-address>/<width>",
3482 .function = set_ip6_link_local_address_cmd,
3486 /* callback when an interface address is added or deleted */
3488 ip6_neighbor_add_del_interface_address (ip6_main_t * im,
3491 ip6_address_t * address,
3493 u32 if_address_index,
3496 vnet_main_t * vnm = vnet_get_main();
3497 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3499 vlib_main_t * vm = vnm->vlib_main;
3500 ip6_radv_t * radv_info;
3502 ip6_mldp_group_t *mcast_group_info;
3504 /* create solicited node multicast address for this interface adddress */
3505 ip6_set_solicited_node_multicast_address (&a, 0);
3507 a.as_u8[0xd] = address->as_u8[0xd];
3508 a.as_u8[0xe] = address->as_u8[0xe];
3509 a.as_u8[0xf] = address->as_u8[0xf];
3513 /* try to create radv_info - does nothing if ipv6 already enabled */
3514 enable_ip6_interface(vm, sw_if_index);
3516 /* look up the radv_t information for this interface */
3517 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
3518 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3522 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3525 if( !ip6_address_is_link_local_unicast (address))
3526 radv_info->ref_count++;
3528 /* lookup prefix info for this address on this interface */
3529 uword * p = mhash_get (&radv_info->address_to_mldp_index, &a);
3530 mcast_group_info = p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
3532 /* add -solicted node multicast address */
3533 if(!mcast_group_info)
3537 pool_get (radv_info->mldp_group_pool, mcast_group_info);
3539 mi = mcast_group_info - radv_info->mldp_group_pool;
3540 mhash_set (&radv_info->address_to_mldp_index, &a, mi, /* old_value */ 0);
3542 mcast_group_info->type = 4;
3543 mcast_group_info->mcast_source_address_pool = 0;
3544 mcast_group_info->num_sources = 0;
3545 clib_memcpy(&mcast_group_info->mcast_address, &a, sizeof(ip6_address_t));
3553 /* look up the radv_t information for this interface */
3554 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
3555 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3559 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3561 /* lookup prefix info for this address on this interface */
3562 uword * p = mhash_get (&radv_info->address_to_mldp_index, &a);
3563 mcast_group_info = p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
3565 if(mcast_group_info)
3567 mhash_unset (&radv_info->address_to_mldp_index, &a,/* old_value */ 0);
3568 pool_put (radv_info->mldp_group_pool, mcast_group_info);
3571 /* if interface up send MLDP "report" */
3572 radv_info->all_routers_mcast = 0;
3575 if( !ip6_address_is_link_local_unicast (address))
3576 radv_info->ref_count--;
3581 clib_error_t *ip6_set_neighbor_limit (u32 neighbor_limit)
3583 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3585 nm->limit_neighbor_cache_size = neighbor_limit;
3589 static clib_error_t * ip6_neighbor_init (vlib_main_t * vm)
3591 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3592 ip6_main_t * im = &ip6_main;
3594 mhash_init (&nm->neighbor_index_by_key,
3595 /* value size */ sizeof (uword),
3596 /* key size */ sizeof (ip6_neighbor_key_t));
3598 icmp6_register_type (vm, ICMP6_neighbor_solicitation, ip6_icmp_neighbor_solicitation_node.index);
3599 icmp6_register_type (vm, ICMP6_neighbor_advertisement, ip6_icmp_neighbor_advertisement_node.index);
3600 icmp6_register_type (vm, ICMP6_router_solicitation, ip6_icmp_router_solicitation_node.index);
3601 icmp6_register_type (vm, ICMP6_router_advertisement, ip6_icmp_router_advertisement_node.index);
3603 /* handler node for ip6 neighbor discovery events and timers */
3604 vlib_register_node (vm, &ip6_icmp_neighbor_discovery_event_node);
3606 /* add call backs */
3607 ip6_add_del_interface_address_callback_t cb;
3608 memset(&cb, 0x0, sizeof(ip6_add_del_interface_address_callback_t));
3610 /* when an interface address changes... */
3611 cb.function = ip6_neighbor_add_del_interface_address;
3612 cb.function_opaque = 0;
3613 vec_add1 (im->add_del_interface_address_callbacks, cb);
3615 mhash_init (&nm->pending_resolutions_by_address,
3616 /* value size */ sizeof (uword),
3617 /* key size */ sizeof (ip6_address_t));
3619 mhash_init (&nm->mac_changes_by_address,
3620 /* value size */ sizeof (uword),
3621 /* key size */ sizeof (ip6_address_t));
3623 /* default, configurable */
3624 nm->limit_neighbor_cache_size = 50000;
3627 /* $$$$ Hack fix for today */
3628 vec_validate_init_empty
3629 (im->discover_neighbor_next_index_by_hw_if_index, 32, 0 /* drop */);
3635 VLIB_INIT_FUNCTION (ip6_neighbor_init);
3638 void vnet_register_ip6_neighbor_resolution_event (vnet_main_t * vnm,
3644 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3645 ip6_address_t * address = address_arg;
3647 pending_resolution_t * pr;
3649 pool_get (nm->pending_resolutions, pr);
3651 pr->next_index = ~0;
3652 pr->node_index = node_index;
3653 pr->type_opaque = type_opaque;
3656 p = mhash_get (&nm->pending_resolutions_by_address, address);
3659 /* Insert new resolution at the head of the list */
3660 pr->next_index = p[0];
3661 mhash_unset (&nm->pending_resolutions_by_address, address, 0);
3664 mhash_set (&nm->pending_resolutions_by_address, address,
3665 pr - nm->pending_resolutions, 0 /* old value */);
3668 int vnet_add_del_ip6_nd_change_event (vnet_main_t * vnm,
3669 void * data_callback,
3677 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3678 ip6_address_t * address = address_arg;
3680 pending_resolution_t * mc;
3681 void (*fp)(u32, u8 *) = data_callback;
3685 pool_get (nm->mac_changes, mc);
3687 mc->next_index = ~0;
3688 mc->node_index = node_index;
3689 mc->type_opaque = type_opaque;
3691 mc->data_callback = data_callback;
3694 p = mhash_get (&nm->mac_changes_by_address, address);
3697 /* Insert new resolution at the head of the list */
3698 mc->next_index = p[0];
3699 mhash_unset (&nm->mac_changes_by_address, address, 0);
3702 mhash_set (&nm->mac_changes_by_address, address,
3703 mc - nm->mac_changes, 0);
3709 pending_resolution_t * mc_last = 0;
3711 p = mhash_get (&nm->mac_changes_by_address, address);
3713 return VNET_API_ERROR_NO_SUCH_ENTRY;
3717 while (index != (u32)~0)
3719 mc = pool_elt_at_index (nm->mac_changes, index);
3720 if (mc->node_index == node_index &&
3721 mc->type_opaque == type_opaque &&
3724 /* Clients may need to clean up pool entries, too */
3726 (*fp)(mc->data, 0 /* no new mac addrs */);
3729 mhash_unset (&nm->mac_changes_by_address, address, 0);
3730 if (mc->next_index != ~0)
3731 mhash_set (&nm->mac_changes_by_address, address,
3733 pool_put (nm->mac_changes, mc);
3739 mc_last->next_index = mc->next_index;
3740 pool_put (nm->mac_changes, mc);
3745 index = mc->next_index;
3748 return VNET_API_ERROR_NO_SUCH_ENTRY;
3752 int vnet_ip6_nd_term (vlib_main_t * vm,
3753 vlib_node_runtime_t * node,
3755 ethernet_header_t * eth,
3761 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3762 icmp6_neighbor_solicitation_or_advertisement_header_t * ndh;
3763 pending_resolution_t * mc;
3766 ndh = ip6_next_header (ip);
3767 if (ndh->icmp.type != ICMP6_neighbor_solicitation &&
3768 ndh->icmp.type != ICMP6_neighbor_advertisement)
3771 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
3772 (p0->flags & VLIB_BUFFER_IS_TRACED)))
3774 u8 *t0 = vlib_add_trace (vm, node, p0,
3775 sizeof (icmp6_input_trace_t));
3776 clib_memcpy (t0, ip, sizeof (icmp6_input_trace_t));
3779 /* Check if anyone want ND events for L2 BDs */
3780 p = mhash_get (&nm->mac_changes_by_address, &ip6a_zero);
3781 if (p && shg == 0 && /* Only SHG 0 interface which is more likely local */
3782 !ip6_address_is_link_local_unicast (&ip->src_address))
3784 u32 next_index = p[0];
3785 while (next_index != (u32)~0)
3787 int (*fp)(u32, u8 *, u32, ip6_address_t *);
3789 mc = pool_elt_at_index (nm->mac_changes, next_index);
3790 fp = mc->data_callback;
3791 /* Call the callback, return 1 to suppress dup events */
3792 if (fp) rv = (*fp)(mc->data,
3796 /* Signal the resolver process */
3798 vlib_process_signal_event (vm, mc->node_index,
3801 next_index = mc->next_index;
3805 /* Check if MAC entry exsist for solicited target IP */
3806 if (ndh->icmp.type == ICMP6_neighbor_solicitation)
3808 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t * opt;
3809 l2_bridge_domain_t *bd_config;
3812 opt = (void *) (ndh + 1);
3813 if ((opt->header.type !=
3814 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address) ||
3815 (opt->header.n_data_u64s != 1))
3816 return 0; /* source link layer address option not present */
3818 bd_config = vec_elt_at_index (l2input_main.bd_configs, bd_index);
3819 macp = (u8 *) hash_get_mem (bd_config->mac_by_ip6, &ndh->target_address);
3821 { /* found ip-mac entry, generate eighbor advertisement response */
3823 vlib_node_runtime_t * error_node =
3824 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
3825 ip->dst_address = ip->src_address;
3826 ip->src_address = ndh->target_address;
3827 ip->hop_limit = 255;
3829 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
3830 clib_memcpy (opt->ethernet_address, macp, 6);
3831 ndh->icmp.type = ICMP6_neighbor_advertisement;
3832 ndh->advertisement_flags = clib_host_to_net_u32
3833 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED |
3834 ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
3835 ndh->icmp.checksum = 0;
3836 ndh->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum(vm, p0, ip,
3838 clib_memcpy(eth->dst_address, eth->src_address, 6);
3839 clib_memcpy(eth->src_address, macp, 6);
3840 vlib_error_count (vm, error_node->node_index,
3841 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX, 1);
3851 ethernet_ndp_change_mac (vlib_main_t * vm, u32 sw_if_index)
3853 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3857 pool_foreach (n, nm->neighbor_pool, ({
3858 if (n->key.sw_if_index == sw_if_index)
3860 adj_nbr_walk_nh6 (sw_if_index,
3861 &n->key.ip6_address,
3862 ip6_nd_mk_complete_walk, n);