2 * ip/ip6_neighbor.c: IP6 neighbor handling
4 * Copyright (c) 2010 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
18 #include <vnet/ip/ip.h>
19 #include <vnet/ip/ip6_neighbor.h>
20 #include <vnet/ethernet/ethernet.h>
21 #include <vppinfra/mhash.h>
22 #include <vppinfra/md5.h>
23 #include <vnet/adj/adj.h>
24 #include <vnet/fib/fib_table.h>
25 #include <vnet/fib/ip6_fib.h>
29 * @brief IPv6 Neighbor Adjacency and Neighbor Discovery.
31 * The files contains the API and CLI code for managing IPv6 neighbor
32 * adjacency tables and neighbor discovery logic.
35 /* can't use sizeof link_layer_address, that's 8 */
36 #define ETHER_MAC_ADDR_LEN 6
38 /* advertised prefix option */
40 /* basic advertised information */
44 int adv_autonomous_flag;
45 u32 adv_valid_lifetime_in_secs;
46 u32 adv_pref_lifetime_in_secs;
48 /* advertised values are computed from these times if decrementing */
49 f64 valid_lifetime_expires;
50 f64 pref_lifetime_expires;
52 /* local information */
54 int deprecated_prefix_flag;
55 int decrement_lifetime_flag;
57 #define MIN_ADV_VALID_LIFETIME 7203 /* seconds */
58 #define DEF_ADV_VALID_LIFETIME 2592000
59 #define DEF_ADV_PREF_LIFETIME 604800
61 /* extensions are added here, mobile, DNS etc.. */
66 /* group information */
68 ip6_address_t mcast_address;
70 ip6_address_t *mcast_source_address_pool;
73 /* configured router advertisement information per ipv6 interface */
76 /* advertised config information, zero means unspecified */
80 u16 adv_router_lifetime_in_sec;
81 u32 adv_neighbor_reachable_time_in_msec;
82 u32 adv_time_in_msec_between_retransmitted_neighbor_solicitations;
87 /* source link layer option */
88 u8 link_layer_address[8];
89 u8 link_layer_addr_len;
92 ip6_radv_prefix_t * adv_prefixes_pool;
94 /* Hash table mapping address to index in interface advertised prefix pool. */
95 mhash_t address_to_prefix_index;
97 /* MLDP group information */
98 ip6_mldp_group_t * mldp_group_pool;
100 /* Hash table mapping address to index in mldp address pool. */
101 mhash_t address_to_mldp_index;
103 /* local information */
106 int send_radv; /* radv on/off on this interface - set by config */
107 int cease_radv; /* we are ceasing to send - set byf config */
109 int adv_link_layer_address;
111 int failed_device_check;
112 int all_routers_mcast;
116 adj_index_t all_nodes_adj_index;
117 adj_index_t all_routers_adj_index;
118 adj_index_t all_mldv2_routers_adj_index;
120 /* timing information */
121 #define DEF_MAX_RADV_INTERVAL 200
122 #define DEF_MIN_RADV_INTERVAL .75 * DEF_MAX_RADV_INTERVAL
123 #define DEF_CURR_HOP_LIMIT 64
124 #define DEF_DEF_RTR_LIFETIME 3 * DEF_MAX_RADV_INTERVAL
125 #define MAX_DEF_RTR_LIFETIME 9000
127 #define MAX_INITIAL_RTR_ADVERT_INTERVAL 16 /* seconds */
128 #define MAX_INITIAL_RTR_ADVERTISEMENTS 3 /*transmissions */
129 #define MIN_DELAY_BETWEEN_RAS 3 /* seconds */
130 #define MAX_DELAY_BETWEEN_RAS 1800 /* seconds */
131 #define MAX_RA_DELAY_TIME .5 /* seconds */
133 f64 max_radv_interval;
134 f64 min_radv_interval;
135 f64 min_delay_between_radv;
136 f64 max_delay_between_radv;
137 f64 max_rtr_default_lifetime;
140 f64 last_multicast_time;
141 f64 next_multicast_time;
144 u32 initial_adverts_count;
145 f64 initial_adverts_interval;
146 u32 initial_adverts_sent;
149 u32 n_advertisements_sent;
150 u32 n_solicitations_rcvd;
151 u32 n_solicitations_dropped;
153 /* Link local address to use (defaults to underlying physical for logical interfaces */
154 ip6_address_t link_local_address;
155 u8 link_local_prefix_len;
164 /* Used for nd event notification only */
165 void * data_callback;
167 } pending_resolution_t;
171 /* Hash tables mapping name to opcode. */
172 uword * opcode_by_name;
174 /* lite beer "glean" adjacency handling */
175 mhash_t pending_resolutions_by_address;
176 pending_resolution_t * pending_resolutions;
178 /* Mac address change notification */
179 mhash_t mac_changes_by_address;
180 pending_resolution_t * mac_changes;
182 u32 * neighbor_input_next_index_by_hw_if_index;
184 ip6_neighbor_t * neighbor_pool;
186 mhash_t neighbor_index_by_key;
188 u32 * if_radv_pool_index_by_sw_if_index;
190 ip6_radv_t * if_radv_pool;
192 /* Neighbor attack mitigation */
193 u32 limit_neighbor_cache_size;
194 u32 neighbor_delete_rotor;
196 } ip6_neighbor_main_t;
198 static ip6_neighbor_main_t ip6_neighbor_main;
199 static ip6_address_t ip6a_zero; /* ip6 address 0 */
201 static u8 * format_ip6_neighbor_ip6_entry (u8 * s, va_list * va)
203 vlib_main_t * vm = va_arg (*va, vlib_main_t *);
204 ip6_neighbor_t * n = va_arg (*va, ip6_neighbor_t *);
205 vnet_main_t * vnm = vnet_get_main();
206 vnet_sw_interface_t * si;
210 return format (s, "%=12s%=20s%=6s%=20s%=40s", "Time", "Address", "Flags", "Link layer", "Interface");
212 if (n->flags & IP6_NEIGHBOR_FLAG_DYNAMIC)
213 flags = format(flags, "D");
215 if (n->flags & IP6_NEIGHBOR_FLAG_STATIC)
216 flags = format(flags, "S");
218 si = vnet_get_sw_interface (vnm, n->key.sw_if_index);
219 s = format (s, "%=12U%=20U%=6s%=20U%=40U",
220 format_vlib_cpu_time, vm, n->cpu_time_last_updated,
221 format_ip6_address, &n->key.ip6_address,
222 flags ? (char *)flags : "",
223 format_ethernet_address, n->link_layer_address,
224 format_vnet_sw_interface_name, vnm, si);
230 static clib_error_t *
231 ip6_neighbor_sw_interface_up_down (vnet_main_t * vnm,
235 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
238 if (! (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
240 u32 i, * to_delete = 0;
242 pool_foreach (n, nm->neighbor_pool, ({
243 if (n->key.sw_if_index == sw_if_index)
244 vec_add1 (to_delete, n - nm->neighbor_pool);
247 for (i = 0; i < vec_len (to_delete); i++)
249 n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
250 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
251 fib_table_entry_delete_index (n->fib_entry_index, FIB_SOURCE_ADJ);
252 pool_put (nm->neighbor_pool, n);
255 vec_free (to_delete);
261 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_neighbor_sw_interface_up_down);
263 static void unset_random_neighbor_entry (void)
265 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
266 vnet_main_t * vnm = vnet_get_main();
267 vlib_main_t * vm = vnm->vlib_main;
271 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
272 nm->neighbor_delete_rotor = index;
274 /* Try again from elt 0, could happen if an intfc goes down */
277 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
278 nm->neighbor_delete_rotor = index;
281 /* Nothing left in the pool */
285 e = pool_elt_at_index (nm->neighbor_pool, index);
287 vnet_unset_ip6_ethernet_neighbor (vm, e->key.sw_if_index,
289 e->link_layer_address,
296 u8 link_layer_address[6];
299 } ip6_neighbor_set_unset_rpc_args_t;
301 static void ip6_neighbor_set_unset_rpc_callback
302 ( ip6_neighbor_set_unset_rpc_args_t * a);
304 static void set_unset_ip6_neighbor_rpc
308 u8 *link_layer_addreess,
309 int is_add, int is_static)
311 ip6_neighbor_set_unset_rpc_args_t args;
312 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
314 args.sw_if_index = sw_if_index;
315 args.is_add = is_add;
316 args.is_static = is_static;
317 clib_memcpy (&args.addr, a, sizeof (*a));
318 clib_memcpy (args.link_layer_address, link_layer_addreess, 6);
320 vl_api_rpc_call_main_thread (ip6_neighbor_set_unset_rpc_callback,
321 (u8 *) &args, sizeof (args));
325 ip6_nbr_probe (ip_adjacency_t *adj)
327 icmp6_neighbor_solicitation_header_t * h;
328 vnet_main_t * vnm = vnet_get_main();
329 ip6_main_t * im = &ip6_main;
330 ip_interface_address_t * ia;
331 ip6_address_t * dst, *src;
332 vnet_hw_interface_t * hi;
333 vnet_sw_interface_t * si;
339 vm = vlib_get_main();
341 si = vnet_get_sw_interface(vnm, adj->rewrite_header.sw_if_index);
342 dst = &adj->sub_type.nbr.next_hop.ip6;
344 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
348 src = ip6_interface_address_matching_destination(im, dst,
349 adj->rewrite_header.sw_if_index,
356 h = vlib_packet_template_get_packet(vm,
357 &im->discover_neighbor_packet_template,
360 hi = vnet_get_sup_hw_interface(vnm, adj->rewrite_header.sw_if_index);
362 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
363 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
364 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
365 h->ip.src_address = src[0];
366 h->neighbor.target_address = dst[0];
368 clib_memcpy (h->link_layer_option.ethernet_address,
370 vec_len(hi->hw_address));
372 h->neighbor.icmp.checksum =
373 ip6_tcp_udp_icmp_compute_checksum(vm, 0, &h->ip, &bogus_length);
374 ASSERT(bogus_length == 0);
376 b = vlib_get_buffer (vm, bi);
377 vnet_buffer (b)->sw_if_index[VLIB_RX] =
378 vnet_buffer (b)->sw_if_index[VLIB_TX] =
379 adj->rewrite_header.sw_if_index;
381 /* Add encapsulation string for software interface (e.g. ethernet header). */
382 vnet_rewrite_one_header(adj[0], h, sizeof (ethernet_header_t));
383 vlib_buffer_advance(b, -adj->rewrite_header.data_bytes);
386 vlib_frame_t * f = vlib_get_frame_to_node(vm, hi->output_node_index);
387 u32 * to_next = vlib_frame_vector_args(f);
390 vlib_put_frame_to_node(vm, hi->output_node_index, f);
395 ip6_nd_mk_complete (adj_index_t ai, ip6_neighbor_t * nbr)
397 adj_nbr_update_rewrite (ai, ADJ_NBR_REWRITE_FLAG_COMPLETE,
398 ethernet_build_rewrite (vnet_get_main (),
399 nbr->key.sw_if_index,
400 adj_get_link_type(ai),
401 nbr->link_layer_address));
405 ip6_nd_mk_incomplete (adj_index_t ai, ip6_neighbor_t * nbr)
407 adj_nbr_update_rewrite (
409 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
410 ethernet_build_rewrite (vnet_get_main (),
411 nbr->key.sw_if_index,
412 adj_get_link_type(ai),
413 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
416 #define IP6_NBR_MK_KEY(k, sw_if_index, addr) \
418 k.sw_if_index = sw_if_index; \
419 k.ip6_address = *addr; \
423 static ip6_neighbor_t *
424 ip6_nd_find (u32 sw_if_index,
425 const ip6_address_t * addr)
427 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
428 ip6_neighbor_t * n = NULL;
429 ip6_neighbor_key_t k;
432 IP6_NBR_MK_KEY(k, sw_if_index, addr);
434 p = mhash_get (&nm->neighbor_index_by_key, &k);
436 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
443 ip6_nd_mk_complete_walk (adj_index_t ai, void *ctx)
445 ip6_neighbor_t *nbr = ctx;
447 ip6_nd_mk_complete (ai, nbr);
449 return (ADJ_WALK_RC_CONTINUE);
453 ip6_nd_mk_incomplete_walk (adj_index_t ai, void *ctx)
455 ip6_neighbor_t *nbr = ctx;
457 ip6_nd_mk_incomplete (ai, nbr);
459 return (ADJ_WALK_RC_CONTINUE);
463 ip6_ethernet_update_adjacency (vnet_main_t * vnm,
472 nbr = ip6_nd_find (sw_if_index, &adj->sub_type.nbr.next_hop.ip6);
476 adj_nbr_walk_nh6 (sw_if_index, &nbr->key.ip6_address,
477 ip6_nd_mk_complete_walk, nbr);
482 * no matching ND entry.
483 * construct the rewrite required to for an ND packet, and stick
484 * that in the adj's pipe to smoke.
486 adj_nbr_update_rewrite (ai,
487 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
488 ethernet_build_rewrite (vnm,
491 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
494 * since the FIB has added this adj for a route, it makes sense it may
495 * want to forward traffic sometime soon. Let's send a speculative ND.
496 * just one. If we were to do periodically that wouldn't be bad either,
497 * but that's more code than i'm prepared to write at this time for
498 * relatively little reward.
505 vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
508 u8 * link_layer_address,
509 uword n_bytes_link_layer_address,
512 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
513 ip6_neighbor_key_t k;
514 ip6_neighbor_t * n = 0;
515 int make_new_nd_cache_entry=1;
518 pending_resolution_t * pr, * mc;
520 if (os_get_cpu_number())
522 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
523 1 /* set new neighbor */, is_static);
527 k.sw_if_index = sw_if_index;
528 k.ip6_address = a[0];
531 p = mhash_get (&nm->neighbor_index_by_key, &k);
533 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
534 /* Refuse to over-write static neighbor entry. */
536 (n->flags & IP6_NEIGHBOR_FLAG_STATIC))
538 make_new_nd_cache_entry = 0;
541 if (make_new_nd_cache_entry) {
544 .fp_proto = FIB_PROTOCOL_IP6,
546 .ip6 = k.ip6_address,
551 pool_get (nm->neighbor_pool, n);
552 mhash_set (&nm->neighbor_index_by_key, &k, n - nm->neighbor_pool,
556 clib_memcpy (n->link_layer_address,
558 n_bytes_link_layer_address);
561 * create the adj-fib. the entry in the FIB table for and to the peer.
563 fib_index = ip6_main.fib_index_by_sw_if_index[n->key.sw_if_index];
565 fib_table_entry_update_one_path(fib_index,
574 NULL, // no label stack
575 FIB_ROUTE_PATH_FLAG_NONE);
580 * prevent a DoS attack from the data-plane that
581 * spams us with no-op updates to the MAC address
583 if (0 == memcmp(n->link_layer_address,
585 n_bytes_link_layer_address))
588 clib_memcpy (n->link_layer_address,
590 n_bytes_link_layer_address);
593 /* Update time stamp and flags. */
594 n->cpu_time_last_updated = clib_cpu_time_now ();
596 n->flags |= IP6_NEIGHBOR_FLAG_STATIC;
598 n->flags |= IP6_NEIGHBOR_FLAG_DYNAMIC;
600 adj_nbr_walk_nh6 (sw_if_index,
602 ip6_nd_mk_complete_walk, n);
604 /* Customer(s) waiting for this address to be resolved? */
605 p = mhash_get (&nm->pending_resolutions_by_address, a);
610 while (next_index != (u32)~0)
612 pr = pool_elt_at_index (nm->pending_resolutions, next_index);
613 vlib_process_signal_event (vm, pr->node_index,
616 next_index = pr->next_index;
617 pool_put (nm->pending_resolutions, pr);
620 mhash_unset (&nm->pending_resolutions_by_address, a, 0);
623 /* Customer(s) requesting ND event for this address? */
624 p = mhash_get (&nm->mac_changes_by_address, a);
629 while (next_index != (u32)~0)
631 int (*fp)(u32, u8 *, u32, ip6_address_t *);
633 mc = pool_elt_at_index (nm->mac_changes, next_index);
634 fp = mc->data_callback;
636 /* Call the user's data callback, return 1 to suppress dup events */
638 rv = (*fp)(mc->data, link_layer_address, sw_if_index, &ip6a_zero);
640 * Signal the resolver process, as long as the user
641 * says they want to be notified
644 vlib_process_signal_event (vm, mc->node_index,
647 next_index = mc->next_index;
655 vnet_unset_ip6_ethernet_neighbor (vlib_main_t * vm,
658 u8 * link_layer_address,
659 uword n_bytes_link_layer_address)
661 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
662 ip6_neighbor_key_t k;
667 if (os_get_cpu_number())
669 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
674 k.sw_if_index = sw_if_index;
675 k.ip6_address = a[0];
678 p = mhash_get (&nm->neighbor_index_by_key, &k);
685 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
687 adj_nbr_walk_nh6 (sw_if_index,
689 ip6_nd_mk_incomplete_walk,
692 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
693 fib_table_entry_delete_index (n->fib_entry_index, FIB_SOURCE_ADJ);
694 pool_put (nm->neighbor_pool, n);
700 static void ip6_neighbor_set_unset_rpc_callback
701 ( ip6_neighbor_set_unset_rpc_args_t * a)
703 vlib_main_t * vm = vlib_get_main();
705 vnet_set_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
706 a->link_layer_address, 6, a->is_static);
708 vnet_unset_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
709 a->link_layer_address, 6);
713 ip6_neighbor_sort (void *a1, void *a2)
715 vnet_main_t * vnm = vnet_get_main();
716 ip6_neighbor_t * n1 = a1, * n2 = a2;
718 cmp = vnet_sw_interface_compare (vnm, n1->key.sw_if_index,
719 n2->key.sw_if_index);
721 cmp = ip6_address_compare (&n1->key.ip6_address, &n2->key.ip6_address);
726 ip6_neighbors_entries (u32 sw_if_index)
728 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
729 ip6_neighbor_t *n, *ns = 0;
732 pool_foreach (n, nm->neighbor_pool, ({
733 if (sw_if_index != ~0 && n->key.sw_if_index != sw_if_index)
740 vec_sort_with_function (ns, ip6_neighbor_sort);
744 static clib_error_t *
745 show_ip6_neighbors (vlib_main_t * vm,
746 unformat_input_t * input,
747 vlib_cli_command_t * cmd)
749 vnet_main_t * vnm = vnet_get_main();
750 ip6_neighbor_t * n, * ns;
751 clib_error_t * error = 0;
754 /* Filter entries by interface if given. */
756 (void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index);
758 ns = ip6_neighbors_entries (sw_if_index);
761 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, 0);
762 vec_foreach (n, ns) {
763 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, n);
772 * This command is used to display the adjacent IPv6 hosts found via
773 * neighbor discovery. Optionally, limit the output to the specified
777 * Example of how to display the IPv6 neighbor adjacency table:
778 * @cliexstart{show ip6 neighbors}
779 * Time Address Flags Link layer Interface
780 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
781 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
782 * 886.6654 ::1:1:c:0:9 S 02:fe:e4:45:27:5b GigabitEthernet3/0/0
784 * Example of how to display the IPv6 neighbor adjacency table for given interface:
785 * @cliexstart{show ip6 neighbors GigabitEthernet2/0/0}
786 * Time Address Flags Link layer Interface
787 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
788 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
792 VLIB_CLI_COMMAND (show_ip6_neighbors_command, static) = {
793 .path = "show ip6 neighbors",
794 .function = show_ip6_neighbors,
795 .short_help = "show ip6 neighbors [<interface>]",
799 static clib_error_t *
800 set_ip6_neighbor (vlib_main_t * vm,
801 unformat_input_t * input,
802 vlib_cli_command_t * cmd)
804 vnet_main_t * vnm = vnet_get_main();
812 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
814 /* intfc, ip6-address, mac-address */
815 if (unformat (input, "%U %U %U",
816 unformat_vnet_sw_interface, vnm, &sw_if_index,
817 unformat_ip6_address, &addr,
818 unformat_ethernet_address, mac_address))
821 else if (unformat (input, "delete") || unformat (input, "del"))
823 else if (unformat (input, "static"))
830 return clib_error_return (0, "Missing interface, ip6 or hw address");
833 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
834 mac_address, sizeof(mac_address), is_static);
836 vnet_unset_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
837 mac_address, sizeof(mac_address));
842 * This command is used to manually add an entry to the IPv6 neighbor
843 * adjacency table. Optionally, the entry can be added as static. It is
844 * also used to remove an entry from the table. Use the '<em>show ip6
845 * neighbors</em>' command to display all learned and manually entered entries.
848 * Example of how to add a static entry to the IPv6 neighbor adjacency table:
849 * @cliexcmd{set ip6 neighbor GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b static}
850 * Example of how to delete an entry from the IPv6 neighbor adjacency table:
851 * @cliexcmd{set ip6 neighbor del GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b}
854 VLIB_CLI_COMMAND (set_ip6_neighbor_command, static) = {
855 .path = "set ip6 neighbor",
856 .function = set_ip6_neighbor,
857 .short_help = "set ip6 neighbor [del] <interface> <ip6-address> <mac-address> [static]",
862 ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP,
863 ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY,
864 ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
865 } icmp6_neighbor_solicitation_or_advertisement_next_t;
867 static_always_inline uword
868 icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
869 vlib_node_runtime_t * node,
870 vlib_frame_t * frame,
871 uword is_solicitation)
873 vnet_main_t * vnm = vnet_get_main();
874 ip6_main_t * im = &ip6_main;
875 uword n_packets = frame->n_vectors;
876 u32 * from, * to_next;
877 u32 n_left_from, n_left_to_next, next_index, n_advertisements_sent;
878 icmp6_neighbor_discovery_option_type_t option_type;
879 vlib_node_runtime_t * error_node = vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
882 from = vlib_frame_vector_args (frame);
883 n_left_from = n_packets;
884 next_index = node->cached_next_index;
886 if (node->flags & VLIB_NODE_FLAG_TRACE)
887 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
889 sizeof (icmp6_input_trace_t));
893 ? ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address
894 : ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address);
895 n_advertisements_sent = 0;
897 while (n_left_from > 0)
899 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
901 while (n_left_from > 0 && n_left_to_next > 0)
905 icmp6_neighbor_solicitation_or_advertisement_header_t * h0;
906 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t * o0;
907 u32 bi0, options_len0, sw_if_index0, next0, error0;
908 u32 ip6_sadd_link_local, ip6_sadd_unspecified;
912 bi0 = to_next[0] = from[0];
919 p0 = vlib_get_buffer (vm, bi0);
920 ip0 = vlib_buffer_get_current (p0);
921 h0 = ip6_next_header (ip0);
922 options_len0 = clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
924 error0 = ICMP6_ERROR_NONE;
925 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
926 ip6_sadd_link_local = ip6_address_is_link_local_unicast(&ip0->src_address);
927 ip6_sadd_unspecified = ip6_address_is_unspecified (&ip0->src_address);
929 /* Check that source address is unspecified, link-local or else on-link. */
930 if (!ip6_sadd_unspecified && !ip6_sadd_link_local)
932 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
934 if (ADJ_INDEX_INVALID != src_adj_index0)
936 ip_adjacency_t * adj0 = ip_get_adjacency (&im->lookup_main, src_adj_index0);
938 /* Allow all realistic-looking rewrite adjacencies to pass */
939 ni0 = adj0->lookup_next_index;
940 is_rewrite0 = (ni0 >= IP_LOOKUP_NEXT_ARP) &&
941 (ni0 < IP6_LOOKUP_N_NEXT);
943 error0 = ((adj0->rewrite_header.sw_if_index != sw_if_index0
945 ? ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK
950 error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK;
954 o0 = (void *) (h0 + 1);
955 o0 = ((options_len0 == 8 && o0->header.type == option_type
956 && o0->header.n_data_u64s == 1) ? o0 : 0);
958 /* If src address unspecified or link local, donot learn neighbor MAC */
959 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
960 !ip6_sadd_unspecified && !ip6_sadd_link_local))
962 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
963 if (nm->limit_neighbor_cache_size &&
964 pool_elts (nm->neighbor_pool) >= nm->limit_neighbor_cache_size)
965 unset_random_neighbor_entry();
966 vnet_set_ip6_ethernet_neighbor (
968 is_solicitation ? &ip0->src_address : &h0->target_address,
969 o0->ethernet_address, sizeof (o0->ethernet_address), 0);
972 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
974 /* Check that target address is local to this router. */
975 fib_node_index_t fei;
978 fib_index = ip6_fib_table_get_index_for_sw_if_index(sw_if_index0);
982 error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
986 fei = ip6_fib_table_lookup_exact_match(fib_index,
990 if (FIB_NODE_INDEX_INVALID == fei ||
991 !(FIB_ENTRY_FLAG_LOCAL &
992 fib_entry_get_flags_for_source(fei, FIB_SOURCE_INTERFACE)))
994 error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1000 next0 = (error0 != ICMP6_ERROR_NONE
1001 ? ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP
1002 : ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY);
1006 error0 = error0 == ICMP6_ERROR_NONE ?
1007 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_RX : error0;
1010 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1012 vnet_sw_interface_t * sw_if0;
1013 ethernet_interface_t * eth_if0;
1014 ethernet_header_t *eth0;
1016 /* dst address is either source address or the all-nodes mcast addr */
1017 if(!ip6_sadd_unspecified)
1018 ip0->dst_address = ip0->src_address;
1020 ip6_set_reserved_multicast_address(&ip0->dst_address,
1021 IP6_MULTICAST_SCOPE_link_local,
1022 IP6_MULTICAST_GROUP_ID_all_hosts);
1024 ip0->src_address = h0->target_address;
1025 ip0->hop_limit = 255;
1026 h0->icmp.type = ICMP6_neighbor_advertisement;
1028 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1029 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1030 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1033 clib_memcpy (o0->ethernet_address, eth_if0->address, 6);
1035 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
1038 h0->advertisement_flags = clib_host_to_net_u32
1039 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED
1040 | ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
1042 h0->icmp.checksum = 0;
1044 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1046 ASSERT(bogus_length == 0);
1048 /* Reuse current MAC header, copy SMAC to DMAC and
1049 * interface MAC to SMAC */
1050 vlib_buffer_advance(p0, - ethernet_buffer_header_size(p0));
1051 eth0 = vlib_buffer_get_current(p0);
1052 clib_memcpy(eth0->dst_address, eth0->src_address, 6);
1054 clib_memcpy(eth0->src_address, eth_if0->address, 6);
1056 /* Setup input and output sw_if_index for packet */
1057 ASSERT(vnet_buffer(p0)->sw_if_index[VLIB_RX] == sw_if_index0);
1058 vnet_buffer(p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1059 vnet_buffer(p0)->sw_if_index[VLIB_RX] =
1060 vnet_main.local_interface_sw_if_index;
1062 n_advertisements_sent++;
1065 p0->error = error_node->errors[error0];
1067 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1068 to_next, n_left_to_next,
1072 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1075 /* Account for advertisements sent. */
1076 vlib_error_count (vm, error_node->node_index, ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX, n_advertisements_sent);
1078 return frame->n_vectors;
1081 /* for "syslogging" - use elog for now */
1082 #define foreach_log_level \
1083 _ (DEBUG, "DEBUG") \
1084 _ (INFO, "INFORMATION") \
1085 _ (NOTICE, "NOTICE") \
1086 _ (WARNING, "WARNING") \
1088 _ (CRIT, "CRITICAL") \
1089 _ (ALERT, "ALERT") \
1090 _ (EMERG, "EMERGENCY")
1093 #define _(f,s) LOG_##f,
1098 static char * log_level_strings[] = {
1104 static int logmask = 1 << LOG_DEBUG;
1107 ip6_neighbor_syslog(vlib_main_t *vm, int priority, char * fmt, ...)
1109 /* just use elog for now */
1113 if( (priority > LOG_EMERG) ||
1114 !(logmask & (1 << priority)))
1120 what = va_format (0, fmt, &va);
1122 ELOG_TYPE_DECLARE (e) = {
1123 .format = "ip6 nd: (%s): %s",
1124 .format_args = "T4T4",
1126 struct { u32 s[2]; } * ed;
1127 ed = ELOG_DATA (&vm->elog_main, e);
1128 ed->s[0] = elog_string(&vm->elog_main, log_level_strings[priority]);
1129 ed->s[1] = elog_string(&vm->elog_main, (char *)what);
1135 /* ipv6 neighbor discovery - router advertisements */
1137 ICMP6_ROUTER_SOLICITATION_NEXT_DROP,
1138 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW,
1139 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX,
1140 ICMP6_ROUTER_SOLICITATION_N_NEXT,
1141 } icmp6_router_solicitation_or_advertisement_next_t;
1143 static_always_inline uword
1144 icmp6_router_solicitation(vlib_main_t * vm,
1145 vlib_node_runtime_t * node,
1146 vlib_frame_t * frame)
1148 vnet_main_t * vnm = vnet_get_main();
1149 ip6_main_t * im = &ip6_main;
1150 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
1151 uword n_packets = frame->n_vectors;
1152 u32 * from, * to_next;
1153 u32 n_left_from, n_left_to_next, next_index;
1154 u32 n_advertisements_sent = 0;
1157 icmp6_neighbor_discovery_option_type_t option_type;
1159 vlib_node_runtime_t * error_node = vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1161 from = vlib_frame_vector_args (frame);
1162 n_left_from = n_packets;
1163 next_index = node->cached_next_index;
1165 if (node->flags & VLIB_NODE_FLAG_TRACE)
1166 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1168 sizeof (icmp6_input_trace_t));
1170 /* source may append his LL address */
1171 option_type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1173 while (n_left_from > 0)
1175 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1177 while (n_left_from > 0 && n_left_to_next > 0)
1181 ip6_radv_t *radv_info = 0;
1183 icmp6_neighbor_discovery_header_t * h0;
1184 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t * o0;
1186 u32 bi0, options_len0, sw_if_index0, next0, error0;
1187 u32 is_solicitation = 1, is_dropped = 0;
1188 u32 is_unspecified, is_link_local;
1190 bi0 = to_next[0] = from[0];
1195 n_left_to_next -= 1;
1197 p0 = vlib_get_buffer (vm, bi0);
1198 ip0 = vlib_buffer_get_current (p0);
1199 h0 = ip6_next_header (ip0);
1200 options_len0 = clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1201 is_unspecified = ip6_address_is_unspecified (&ip0->src_address);
1202 is_link_local = ip6_address_is_link_local_unicast (&ip0->src_address);
1204 error0 = ICMP6_ERROR_NONE;
1205 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1207 /* check if solicitation (not from nd_timer node) */
1208 if (ip6_address_is_unspecified (&ip0->dst_address))
1209 is_solicitation = 0;
1211 /* Check that source address is unspecified, link-local or else on-link. */
1212 if (!is_unspecified && !is_link_local)
1214 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1216 if (ADJ_INDEX_INVALID != src_adj_index0)
1218 ip_adjacency_t * adj0 = ip_get_adjacency (&im->lookup_main,
1221 error0 = (adj0->rewrite_header.sw_if_index != sw_if_index0
1222 ? ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK
1227 error0 = ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK;
1231 /* check for source LL option and process */
1232 o0 = (void *) (h0 + 1);
1233 o0 = ((options_len0 == 8
1234 && o0->header.type == option_type
1235 && o0->header.n_data_u64s == 1)
1239 /* if src address unspecified IGNORE any options */
1240 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1241 !is_unspecified && !is_link_local)) {
1242 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
1243 if (nm->limit_neighbor_cache_size &&
1244 pool_elts (nm->neighbor_pool) >= nm->limit_neighbor_cache_size)
1245 unset_random_neighbor_entry();
1247 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1249 o0->ethernet_address,
1250 sizeof (o0->ethernet_address), 0);
1253 /* default is to drop */
1254 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1256 if (error0 == ICMP6_ERROR_NONE)
1258 vnet_sw_interface_t * sw_if0;
1259 ethernet_interface_t * eth_if0;
1262 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1263 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1264 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1266 /* only support ethernet interface type for now */
1267 error0 = (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF : error0;
1269 if (error0 == ICMP6_ERROR_NONE)
1273 /* adjust the sizeof the buffer to just include the ipv6 header */
1274 p0->current_length -= (options_len0 + sizeof(icmp6_neighbor_discovery_header_t));
1276 /* look up the radv_t information for this interface */
1277 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
1279 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1282 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1284 error0 = ((!radv_info) ? ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG : error0);
1286 if (error0 == ICMP6_ERROR_NONE)
1288 f64 now = vlib_time_now (vm);
1290 /* for solicited adverts - need to rate limit */
1293 if( (now - radv_info->last_radv_time) < MIN_DELAY_BETWEEN_RAS )
1296 radv_info->last_radv_time = now;
1300 icmp6_router_advertisement_header_t rh;
1302 rh.icmp.type = ICMP6_router_advertisement;
1304 rh.icmp.checksum = 0;
1306 rh.current_hop_limit = radv_info->curr_hop_limit;
1307 rh.router_lifetime_in_sec = clib_host_to_net_u16(radv_info->adv_router_lifetime_in_sec);
1308 rh.time_in_msec_between_retransmitted_neighbor_solicitations =
1309 clib_host_to_net_u32(radv_info->adv_time_in_msec_between_retransmitted_neighbor_solicitations);
1310 rh.neighbor_reachable_time_in_msec =
1311 clib_host_to_net_u32(radv_info->adv_neighbor_reachable_time_in_msec);
1313 rh.flags = (radv_info->adv_managed_flag) ? ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP : 0;
1314 rh.flags |= ( (radv_info->adv_other_flag) ? ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP : 0);
1317 u16 payload_length = sizeof(icmp6_router_advertisement_header_t);
1319 vlib_buffer_add_data (vm,
1320 p0->free_list_index,
1322 (void *)&rh, sizeof(icmp6_router_advertisement_header_t));
1324 if(radv_info->adv_link_layer_address)
1326 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t h;
1328 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1329 h.header.n_data_u64s = 1;
1331 /* copy ll address */
1332 clib_memcpy(&h.ethernet_address[0], eth_if0->address, 6);
1334 vlib_buffer_add_data (vm,
1335 p0->free_list_index,
1337 (void *)&h, sizeof(icmp6_neighbor_discovery_ethernet_link_layer_address_option_t));
1339 payload_length += sizeof(icmp6_neighbor_discovery_ethernet_link_layer_address_option_t);
1342 /* add MTU option */
1343 if(radv_info->adv_link_mtu)
1345 icmp6_neighbor_discovery_mtu_option_t h;
1348 h.mtu = clib_host_to_net_u32(radv_info->adv_link_mtu);
1349 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu;
1350 h.header.n_data_u64s = 1;
1352 payload_length += sizeof( icmp6_neighbor_discovery_mtu_option_t);
1354 vlib_buffer_add_data (vm,
1355 p0->free_list_index,
1357 (void *)&h, sizeof(icmp6_neighbor_discovery_mtu_option_t));
1360 /* add advertised prefix options */
1361 ip6_radv_prefix_t *pr_info;
1363 pool_foreach (pr_info, radv_info->adv_prefixes_pool, ({
1365 if(pr_info->enabled &&
1366 (!pr_info->decrement_lifetime_flag || (pr_info->pref_lifetime_expires >0)))
1368 /* advertise this prefix */
1369 icmp6_neighbor_discovery_prefix_information_option_t h;
1371 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information;
1372 h.header.n_data_u64s = (sizeof(icmp6_neighbor_discovery_prefix_information_option_t) >> 3);
1374 h.dst_address_length = pr_info->prefix_len;
1376 h.flags = (pr_info->adv_on_link_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_FLAG_ON_LINK : 0;
1377 h.flags |= (pr_info->adv_autonomous_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_AUTO : 0;
1379 if(radv_info->cease_radv && pr_info->deprecated_prefix_flag)
1381 h.valid_time = clib_host_to_net_u32(MIN_ADV_VALID_LIFETIME);
1382 h.preferred_time = 0;
1386 if(pr_info->decrement_lifetime_flag)
1388 pr_info->adv_valid_lifetime_in_secs = ((pr_info->valid_lifetime_expires > now)) ?
1389 (pr_info->valid_lifetime_expires - now) : 0;
1391 pr_info->adv_pref_lifetime_in_secs = ((pr_info->pref_lifetime_expires > now)) ?
1392 (pr_info->pref_lifetime_expires - now) : 0;
1395 h.valid_time = clib_host_to_net_u32(pr_info->adv_valid_lifetime_in_secs);
1396 h.preferred_time = clib_host_to_net_u32(pr_info->adv_pref_lifetime_in_secs) ;
1400 clib_memcpy(&h.dst_address, &pr_info->prefix, sizeof(ip6_address_t));
1402 payload_length += sizeof( icmp6_neighbor_discovery_prefix_information_option_t);
1404 vlib_buffer_add_data (vm,
1405 p0->free_list_index,
1407 (void *)&h, sizeof(icmp6_neighbor_discovery_prefix_information_option_t));
1412 /* add additional options before here */
1414 /* finish building the router advertisement... */
1415 if(!is_unspecified && radv_info->send_unicast)
1417 ip0->dst_address = ip0->src_address;
1421 /* target address is all-nodes mcast addr */
1422 ip6_set_reserved_multicast_address(&ip0->dst_address,
1423 IP6_MULTICAST_SCOPE_link_local,
1424 IP6_MULTICAST_GROUP_ID_all_hosts);
1427 /* source address MUST be the link-local address */
1428 ip0->src_address = radv_info->link_local_address;
1430 ip0->hop_limit = 255;
1431 ip0->payload_length = clib_host_to_net_u16 (payload_length);
1433 icmp6_router_advertisement_header_t * rh0 = (icmp6_router_advertisement_header_t *)(ip0 + 1);
1434 rh0->icmp.checksum =
1435 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1437 ASSERT(bogus_length == 0);
1439 /* setup output if and adjacency */
1440 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1441 vnet_main.local_interface_sw_if_index;
1443 if (is_solicitation)
1445 ethernet_header_t *eth0;
1446 /* Reuse current MAC header, copy SMAC to DMAC and
1447 * interface MAC to SMAC */
1448 vlib_buffer_reset (p0);
1449 eth0 = vlib_buffer_get_current(p0);
1450 clib_memcpy(eth0->dst_address, eth0->src_address, 6);
1451 clib_memcpy(eth0->src_address, eth_if0->address, 6);
1452 next0 = is_dropped ?
1453 next0 : ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX;
1454 vnet_buffer(p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1458 adj_index0 = radv_info->all_nodes_adj_index;
1459 if (adj_index0 == 0)
1460 error0 = ICMP6_ERROR_DST_LOOKUP_MISS;
1463 ip_adjacency_t * adj0 = ip_get_adjacency (&im->lookup_main, adj_index0);
1465 ((adj0->rewrite_header.sw_if_index != sw_if_index0
1466 || adj0->lookup_next_index != IP_LOOKUP_NEXT_REWRITE)
1467 ? ICMP6_ERROR_ROUTER_SOLICITATION_DEST_UNKNOWN
1469 next0 = is_dropped ?
1470 next0 : ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW;
1471 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = adj_index0;
1474 p0->flags |= VNET_BUFFER_LOCALLY_ORIGINATED;
1476 radv_info->n_solicitations_dropped += is_dropped;
1477 radv_info->n_solicitations_rcvd += is_solicitation;
1479 if((error0 == ICMP6_ERROR_NONE) && !is_dropped)
1481 radv_info->n_advertisements_sent++;
1482 n_advertisements_sent++;
1488 p0->error = error_node->errors[error0];
1490 if(error0 != ICMP6_ERROR_NONE)
1491 vlib_error_count (vm, error_node->node_index, error0, 1);
1493 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1494 to_next, n_left_to_next,
1499 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1502 /* Account for router advertisements sent. */
1503 vlib_error_count (vm, error_node->node_index, ICMP6_ERROR_ROUTER_ADVERTISEMENTS_TX, n_advertisements_sent);
1505 return frame->n_vectors;
1508 /* validate advertised info for consistancy (see RFC-4861 section 6.2.7) - log any inconsistencies, packet will always be dropped */
1509 static_always_inline uword
1510 icmp6_router_advertisement(vlib_main_t * vm,
1511 vlib_node_runtime_t * node,
1512 vlib_frame_t * frame)
1514 vnet_main_t * vnm = vnet_get_main();
1515 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
1516 uword n_packets = frame->n_vectors;
1517 u32 * from, * to_next;
1518 u32 n_left_from, n_left_to_next, next_index;
1519 u32 n_advertisements_rcvd = 0;
1521 vlib_node_runtime_t * error_node = vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1523 from = vlib_frame_vector_args (frame);
1524 n_left_from = n_packets;
1525 next_index = node->cached_next_index;
1527 if (node->flags & VLIB_NODE_FLAG_TRACE)
1528 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1530 sizeof (icmp6_input_trace_t));
1532 while (n_left_from > 0)
1534 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1536 while (n_left_from > 0 && n_left_to_next > 0)
1540 ip6_radv_t *radv_info = 0;
1541 icmp6_router_advertisement_header_t * h0;
1542 u32 bi0, options_len0, sw_if_index0, next0, error0;
1544 bi0 = to_next[0] = from[0];
1549 n_left_to_next -= 1;
1551 p0 = vlib_get_buffer (vm, bi0);
1552 ip0 = vlib_buffer_get_current (p0);
1553 h0 = ip6_next_header (ip0);
1554 options_len0 = clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1556 error0 = ICMP6_ERROR_NONE;
1557 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1559 /* Check that source address is link-local*/
1560 error0 = (!ip6_address_is_link_local_unicast (&ip0->src_address)) ?
1561 ICMP6_ERROR_ROUTER_ADVERTISEMENT_SOURCE_NOT_LINK_LOCAL : error0;
1563 /* default is to drop */
1564 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1566 n_advertisements_rcvd++;
1568 if (error0 == ICMP6_ERROR_NONE)
1570 vnet_sw_interface_t * sw_if0;
1571 ethernet_interface_t * eth_if0;
1573 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1574 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1575 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1577 /* only support ethernet interface type for now */
1578 error0 = (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF : error0;
1580 if (error0 == ICMP6_ERROR_NONE)
1584 /* look up the radv_t information for this interface */
1585 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
1587 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1590 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1592 error0 = ((!radv_info) ? ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG : error0);
1594 if (error0 == ICMP6_ERROR_NONE)
1596 /* validate advertised information */
1597 if((h0->current_hop_limit && radv_info->curr_hop_limit) &&
1598 (h0->current_hop_limit != radv_info->curr_hop_limit))
1600 ip6_neighbor_syslog(vm, LOG_WARNING,
1601 "our AdvCurHopLimit on %U doesn't agree with %U",
1602 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1605 if((h0->flags & ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP) !=
1606 radv_info->adv_managed_flag)
1608 ip6_neighbor_syslog(vm, LOG_WARNING,
1609 "our AdvManagedFlag on %U doesn't agree with %U",
1610 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1613 if((h0->flags & ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP) !=
1614 radv_info->adv_other_flag)
1616 ip6_neighbor_syslog(vm, LOG_WARNING,
1617 "our AdvOtherConfigFlag on %U doesn't agree with %U",
1618 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1621 if((h0->time_in_msec_between_retransmitted_neighbor_solicitations &&
1622 radv_info->adv_time_in_msec_between_retransmitted_neighbor_solicitations) &&
1623 (h0->time_in_msec_between_retransmitted_neighbor_solicitations !=
1624 clib_host_to_net_u32(radv_info->adv_time_in_msec_between_retransmitted_neighbor_solicitations)))
1626 ip6_neighbor_syslog(vm, LOG_WARNING,
1627 "our AdvRetransTimer on %U doesn't agree with %U",
1628 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1631 if((h0->neighbor_reachable_time_in_msec &&
1632 radv_info->adv_neighbor_reachable_time_in_msec) &&
1633 (h0->neighbor_reachable_time_in_msec !=
1634 clib_host_to_net_u32(radv_info->adv_neighbor_reachable_time_in_msec)))
1636 ip6_neighbor_syslog(vm, LOG_WARNING,
1637 "our AdvReachableTime on %U doesn't agree with %U",
1638 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1641 /* check for MTU or prefix options or .. */
1642 u8 * opt_hdr = (u8 *)(h0 + 1);
1643 while( options_len0 > 0)
1645 icmp6_neighbor_discovery_option_header_t *o0 = ( icmp6_neighbor_discovery_option_header_t *)opt_hdr;
1646 int opt_len = o0->n_data_u64s << 3;
1647 icmp6_neighbor_discovery_option_type_t option_type = o0->type;
1649 if(options_len0 < 2)
1651 ip6_neighbor_syslog(vm, LOG_ERR,
1652 "malformed RA packet on %U from %U",
1653 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1659 ip6_neighbor_syslog(vm, LOG_ERR,
1660 " zero length option in RA on %U from %U",
1661 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1664 else if( opt_len > options_len0)
1666 ip6_neighbor_syslog(vm, LOG_ERR,
1667 "option length in RA packet greater than total length on %U from %U",
1668 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1672 options_len0 -= opt_len;
1677 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu:
1679 icmp6_neighbor_discovery_mtu_option_t *h =
1680 (icmp6_neighbor_discovery_mtu_option_t *)(o0);
1682 if(opt_len < sizeof(*h))
1685 if((h->mtu && radv_info->adv_link_mtu) &&
1686 (h->mtu != clib_host_to_net_u32(radv_info->adv_link_mtu)))
1688 ip6_neighbor_syslog(vm, LOG_WARNING,
1689 "our AdvLinkMTU on %U doesn't agree with %U",
1690 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1695 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information:
1697 icmp6_neighbor_discovery_prefix_information_option_t *h =
1698 (icmp6_neighbor_discovery_prefix_information_option_t *)(o0);
1700 /* validate advertised prefix options */
1701 ip6_radv_prefix_t *pr_info;
1702 u32 preferred, valid;
1704 if(opt_len < sizeof(*h))
1707 preferred = clib_net_to_host_u32(h->preferred_time);
1708 valid = clib_net_to_host_u32(h->valid_time);
1710 /* look for matching prefix - if we our advertising it, it better be consistant */
1711 pool_foreach (pr_info, radv_info->adv_prefixes_pool, ({
1714 ip6_address_mask_from_width(&mask, pr_info->prefix_len);
1716 if(pr_info->enabled &&
1717 (pr_info->prefix_len == h->dst_address_length) &&
1718 ip6_address_is_equal_masked (&pr_info->prefix, &h->dst_address, &mask))
1721 if(!pr_info->decrement_lifetime_flag &&
1722 valid != pr_info->adv_valid_lifetime_in_secs)
1724 ip6_neighbor_syslog(vm, LOG_WARNING,
1725 "our ADV validlifetime on %U for %U does not agree with %U",
1726 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
1727 format_ip6_address, &h->dst_address);
1729 if(!pr_info->decrement_lifetime_flag &&
1730 preferred != pr_info->adv_pref_lifetime_in_secs)
1732 ip6_neighbor_syslog(vm, LOG_WARNING,
1733 "our ADV preferredlifetime on %U for %U does not agree with %U",
1734 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
1735 format_ip6_address, &h->dst_address);
1751 p0->error = error_node->errors[error0];
1753 if(error0 != ICMP6_ERROR_NONE)
1754 vlib_error_count (vm, error_node->node_index, error0, 1);
1756 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1757 to_next, n_left_to_next,
1761 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1764 /* Account for router advertisements sent. */
1765 vlib_error_count (vm, error_node->node_index, ICMP6_ERROR_ROUTER_ADVERTISEMENTS_RX, n_advertisements_rcvd);
1767 return frame->n_vectors;
1770 /* create and initialize router advertisement parameters with default values for this intfc */
1772 ip6_neighbor_sw_interface_add_del (vnet_main_t * vnm,
1776 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
1779 vnet_sw_interface_t * sw_if0;
1780 ethernet_interface_t * eth_if0 = 0;
1782 /* lookup radv container - ethernet interfaces only */
1783 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
1784 if(sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
1785 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1790 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
1791 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
1795 a = pool_elt_at_index (nm->if_radv_pool, ri);
1799 u32 i, * to_delete = 0;
1800 ip6_radv_prefix_t *p;
1801 ip6_mldp_group_t *m;
1803 /* remove adjacencies */
1804 adj_unlock(a->all_nodes_adj_index);
1805 adj_unlock(a->all_routers_adj_index);
1806 adj_unlock(a->all_mldv2_routers_adj_index);
1808 /* clean up prefix_pool */
1809 pool_foreach (p, a->adv_prefixes_pool, ({
1810 vec_add1 (to_delete, p - a->adv_prefixes_pool);
1813 for (i = 0; i < vec_len (to_delete); i++)
1815 p = pool_elt_at_index (a->adv_prefixes_pool, to_delete[i]);
1816 mhash_unset (&a->address_to_prefix_index, &p->prefix, 0);
1817 pool_put (a->adv_prefixes_pool, p);
1820 vec_free (to_delete);
1823 /* clean up mldp group pool */
1824 pool_foreach (m, a->mldp_group_pool, ({
1825 vec_add1 (to_delete, m - a->mldp_group_pool);
1828 for (i = 0; i < vec_len (to_delete); i++)
1830 m = pool_elt_at_index (a->mldp_group_pool, to_delete[i]);
1831 mhash_unset (&a->address_to_mldp_index, &m->mcast_address, 0);
1832 pool_put (a->mldp_group_pool, m);
1835 vec_free (to_delete);
1837 pool_put (nm->if_radv_pool, a);
1838 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ~0;
1846 vnet_hw_interface_t * hw_if0;
1848 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index);
1850 pool_get (nm->if_radv_pool, a);
1852 ri = a - nm->if_radv_pool;
1853 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ri;
1855 /* initialize default values (most of which are zero) */
1856 memset (a, 0, sizeof (a[0]));
1858 a->sw_if_index = sw_if_index;
1860 a->max_radv_interval = DEF_MAX_RADV_INTERVAL;
1861 a->min_radv_interval = DEF_MIN_RADV_INTERVAL;
1862 a->curr_hop_limit = DEF_CURR_HOP_LIMIT;
1863 a->adv_router_lifetime_in_sec = DEF_DEF_RTR_LIFETIME;
1865 a->adv_link_layer_address = 1; /* send ll address source address option */
1867 a->min_delay_between_radv = MIN_DELAY_BETWEEN_RAS;
1868 a->max_delay_between_radv = MAX_DELAY_BETWEEN_RAS;
1869 a->max_rtr_default_lifetime = MAX_DEF_RTR_LIFETIME;
1870 a->seed = (u32) clib_cpu_time_now();
1871 (void) random_u32 (&a->seed);
1872 a->randomizer = clib_cpu_time_now();
1873 (void) random_u64 (&a->randomizer);
1875 a->initial_adverts_count = MAX_INITIAL_RTR_ADVERTISEMENTS ;
1876 a->initial_adverts_sent = a->initial_adverts_count-1;
1877 a->initial_adverts_interval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
1879 /* deafult is to send */
1882 /* fill in radv_info for this interface that will be needed later */
1883 a->adv_link_mtu = hw_if0->max_l3_packet_bytes[VLIB_RX];
1885 clib_memcpy (a->link_layer_address, eth_if0->address, 6);
1887 /* fill in default link-local address (this may be overridden) */
1888 ip6_link_local_address_from_ethernet_address (&a->link_local_address, eth_if0->address);
1889 a->link_local_prefix_len = 64;
1891 mhash_init (&a->address_to_prefix_index, sizeof (uword), sizeof (ip6_address_t));
1892 mhash_init (&a->address_to_mldp_index, sizeof (uword), sizeof (ip6_address_t));
1895 u8 link_layer_address[6] =
1896 {0x33, 0x33, 0x00, 0x00, 0x00, IP6_MULTICAST_GROUP_ID_all_hosts};
1898 a->all_nodes_adj_index = adj_rewrite_add_and_lock(FIB_PROTOCOL_IP6,
1901 link_layer_address);
1905 u8 link_layer_address[6] =
1906 {0x33, 0x33, 0x00, 0x00, 0x00, IP6_MULTICAST_GROUP_ID_all_routers};
1908 a->all_routers_adj_index = adj_rewrite_add_and_lock(FIB_PROTOCOL_IP6,
1911 link_layer_address);
1915 u8 link_layer_address[6] =
1916 {0x33, 0x33, 0x00, 0x00, 0x00, IP6_MULTICAST_GROUP_ID_mldv2_routers};
1918 a->all_mldv2_routers_adj_index =
1919 adj_rewrite_add_and_lock(FIB_PROTOCOL_IP6,
1922 link_layer_address);
1925 /* add multicast groups we will always be reporting */
1927 ip6_mldp_group_t *mcast_group_info;
1929 ip6_set_reserved_multicast_address (&addr,
1930 IP6_MULTICAST_SCOPE_link_local,
1931 IP6_MULTICAST_GROUP_ID_all_hosts);
1933 /* lookup mldp info for this interface */
1935 uword * p = mhash_get (&a->address_to_mldp_index, &addr);
1936 mcast_group_info = p ? pool_elt_at_index (a->mldp_group_pool, p[0]) : 0;
1939 if(!mcast_group_info)
1943 pool_get (a->mldp_group_pool, mcast_group_info);
1945 mi = mcast_group_info - a->mldp_group_pool;
1946 mhash_set (&a->address_to_mldp_index, &addr, mi, /* old_value */ 0);
1948 mcast_group_info->type = 4;
1949 mcast_group_info->mcast_source_address_pool = 0;
1950 mcast_group_info->num_sources = 0;
1951 clib_memcpy(&mcast_group_info->mcast_address, &addr, sizeof(ip6_address_t));
1954 ip6_set_reserved_multicast_address (&addr,
1955 IP6_MULTICAST_SCOPE_link_local,
1956 IP6_MULTICAST_GROUP_ID_all_routers);
1958 p = mhash_get (&a->address_to_mldp_index, &addr);
1959 mcast_group_info = p ? pool_elt_at_index (a->mldp_group_pool, p[0]) : 0;
1961 if(!mcast_group_info)
1965 pool_get (a->mldp_group_pool, mcast_group_info);
1967 mi = mcast_group_info - a->mldp_group_pool;
1968 mhash_set (&a->address_to_mldp_index, &addr, mi, /* old_value */ 0);
1970 mcast_group_info->type = 4;
1971 mcast_group_info->mcast_source_address_pool = 0;
1972 mcast_group_info->num_sources = 0;
1973 clib_memcpy(&mcast_group_info->mcast_address, &addr, sizeof(ip6_address_t));
1976 ip6_set_reserved_multicast_address (&addr,
1977 IP6_MULTICAST_SCOPE_link_local,
1978 IP6_MULTICAST_GROUP_ID_mldv2_routers);
1980 p = mhash_get (&a->address_to_mldp_index, &addr);
1981 mcast_group_info = p ? pool_elt_at_index (a->mldp_group_pool, p[0]) : 0;
1983 if(!mcast_group_info)
1987 pool_get (a->mldp_group_pool, mcast_group_info);
1989 mi = mcast_group_info - a->mldp_group_pool;
1990 mhash_set (&a->address_to_mldp_index, &addr, mi, /* old_value */ 0);
1992 mcast_group_info->type = 4;
1993 mcast_group_info->mcast_source_address_pool = 0;
1994 mcast_group_info->num_sources = 0;
1995 clib_memcpy(&mcast_group_info->mcast_address, &addr, sizeof(ip6_address_t));
2002 /* send an mldpv2 report */
2004 ip6_neighbor_send_mldpv2_report(u32 sw_if_index)
2006 vnet_main_t * vnm = vnet_get_main();
2007 vlib_main_t * vm = vnm->vlib_main;
2008 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
2009 vnet_sw_interface_t * sw_if0;
2010 ethernet_interface_t * eth_if0;
2014 ip6_radv_t *radv_info;
2024 icmp6_multicast_listener_report_header_t *rh0;
2025 icmp6_multicast_listener_report_packet_t *rp0;
2027 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2028 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
2029 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2031 if (!eth_if0 || !vnet_sw_interface_is_admin_up (vnm, sw_if_index))
2034 /* look up the radv_t information for this interface */
2035 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
2037 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2042 /* send report now - build a mldpv2 report packet */
2043 n_allocated = vlib_buffer_alloc_from_free_list(vm,
2046 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2047 if (PREDICT_FALSE(n_allocated == 0))
2049 clib_warning ("buffer allocation failure");
2053 b0 = vlib_get_buffer (vm, bo0);
2055 /* adjust the sizeof the buffer to just include the ipv6 header */
2056 b0->current_length = sizeof(icmp6_multicast_listener_report_packet_t);
2058 payload_length = sizeof(icmp6_multicast_listener_report_header_t);
2060 b0->error = ICMP6_ERROR_NONE;
2062 rp0 = vlib_buffer_get_current (b0);
2063 ip0 = (ip6_header_t *)&rp0-> ip;
2064 rh0 = (icmp6_multicast_listener_report_header_t *)&rp0-> report_hdr;
2066 memset (rp0 , 0x0, sizeof (icmp6_multicast_listener_report_packet_t));
2068 ip0->ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2070 ip0->protocol = IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS;
2071 /* for DEBUG - vnet driver won't seem to emit router alerts */
2072 /* ip0->protocol = IP_PROTOCOL_ICMP6; */
2075 rh0->icmp.type = ICMP6_multicast_listener_report_v2;
2077 /* source address MUST be the link-local address */
2078 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2079 ip0->src_address = radv_info->link_local_address;
2081 /* destination is all mldpv2 routers */
2082 ip6_set_reserved_multicast_address(&ip0->dst_address,
2083 IP6_MULTICAST_SCOPE_link_local,
2084 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2086 /* add reports here */
2087 ip6_mldp_group_t *m;
2088 int num_addr_records = 0;
2089 icmp6_multicast_address_record_t rr;
2091 /* fill in the hop-by-hop extension header (router alert) info */
2092 rh0->ext_hdr.next_hdr = IP_PROTOCOL_ICMP6;
2093 rh0->ext_hdr.n_data_u64s = 0;
2095 rh0->alert.type = IP6_MLDP_ALERT_TYPE;
2097 rh0->alert.value = 0;
2102 rh0->icmp.checksum = 0;
2104 pool_foreach (m, radv_info->mldp_group_pool, ({
2107 rr.aux_data_len_u32s = 0;
2108 rr.num_sources = clib_host_to_net_u16 (m->num_sources);
2109 clib_memcpy(&rr.mcast_addr, &m->mcast_address, sizeof(ip6_address_t));
2113 vlib_buffer_add_data (vm,
2114 b0->free_list_index,
2116 (void *)&rr, sizeof(icmp6_multicast_address_record_t));
2118 payload_length += sizeof( icmp6_multicast_address_record_t);
2122 rh0->num_addr_records = clib_host_to_net_u16(num_addr_records);
2124 /* update lengths */
2125 ip0->payload_length = clib_host_to_net_u16 (payload_length);
2127 rh0->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0,
2129 ASSERT(bogus_length == 0);
2132 * OK to override w/ no regard for actual FIB, because
2133 * ip6-rewrite only looks at the adjacency.
2135 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
2136 vnet_main.local_interface_sw_if_index;
2138 vnet_buffer (b0)->ip.adj_index[VLIB_TX] =
2139 radv_info->all_mldv2_routers_adj_index;
2140 b0->flags |= VNET_BUFFER_LOCALLY_ORIGINATED;
2142 vlib_node_t * node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite");
2144 f = vlib_get_frame_to_node (vm, node->index);
2145 to_next = vlib_frame_vector_args (f);
2149 vlib_put_frame_to_node (vm, node->index, f);
2153 VLIB_REGISTER_NODE (ip6_icmp_router_solicitation_node,static) = {
2154 .function = icmp6_router_solicitation,
2155 .name = "icmp6-router-solicitation",
2157 .vector_size = sizeof (u32),
2159 .format_trace = format_icmp6_input_trace,
2161 .n_next_nodes = ICMP6_ROUTER_SOLICITATION_N_NEXT,
2163 [ICMP6_ROUTER_SOLICITATION_NEXT_DROP] = "error-drop",
2164 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW] = "ip6-rewrite",
2165 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX] = "interface-output",
2169 /* send a RA or update the timer info etc.. */
2171 ip6_neighbor_process_timer_event (vlib_main_t * vm,
2172 vlib_node_runtime_t * node,
2173 vlib_frame_t * frame)
2175 vnet_main_t * vnm = vnet_get_main();
2176 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
2177 ip6_radv_t *radv_info;
2178 vlib_frame_t * f = 0;
2179 u32 n_this_frame = 0;
2180 u32 n_left_to_next = 0;
2183 icmp6_router_solicitation_header_t * h0;
2185 f64 now = vlib_time_now (vm);
2187 /* Interface ip6 radv info list */
2188 pool_foreach (radv_info, nm->if_radv_pool, ({
2190 if( !vnet_sw_interface_is_admin_up (vnm, radv_info->sw_if_index))
2192 radv_info->initial_adverts_sent = radv_info->initial_adverts_count-1;
2193 radv_info->next_multicast_time = now;
2194 radv_info->last_multicast_time = now;
2195 radv_info->last_radv_time = 0;
2196 radv_info->all_routers_mcast = 0;
2200 /* Make sure that we've joined the all-routers multicast group */
2201 if(!radv_info->all_routers_mcast)
2203 /* send MDLP_REPORT_EVENT message */
2204 ip6_neighbor_send_mldpv2_report(radv_info->sw_if_index);
2205 radv_info->all_routers_mcast = 1;
2208 /* is it time to send a multicast RA on this interface? */
2209 if(radv_info->send_radv && (now >= radv_info->next_multicast_time))
2214 f64 rfn = (radv_info->max_radv_interval - radv_info->min_radv_interval) *
2215 random_f64 (&radv_info->seed) + radv_info->min_radv_interval;
2217 /* multicast send - compute next multicast send time */
2218 if( radv_info->initial_adverts_sent > 0)
2220 radv_info->initial_adverts_sent--;
2221 if(rfn > radv_info-> initial_adverts_interval)
2222 rfn = radv_info-> initial_adverts_interval;
2224 /* check to see if we are ceasing to send */
2225 if( radv_info->initial_adverts_sent == 0)
2226 if(radv_info->cease_radv)
2227 radv_info->send_radv = 0;
2230 radv_info->next_multicast_time = rfn + now;
2231 radv_info->last_multicast_time = now;
2233 /* send advert now - build a "solicted" router advert with unspecified source address */
2234 n_allocated = vlib_buffer_alloc_from_free_list(vm,
2237 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2239 if (PREDICT_FALSE(n_allocated == 0))
2241 clib_warning ("buffer allocation failure");
2244 b0 = vlib_get_buffer (vm, bo0);
2245 b0->current_length = sizeof( icmp6_router_solicitation_header_t);
2246 b0->error = ICMP6_ERROR_NONE;
2247 vnet_buffer (b0)->sw_if_index[VLIB_RX] = radv_info->sw_if_index;
2249 h0 = vlib_buffer_get_current (b0);
2251 memset (h0, 0, sizeof (icmp6_router_solicitation_header_t));
2253 h0->ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2254 h0->ip.payload_length = clib_host_to_net_u16 (sizeof (icmp6_router_solicitation_header_t)
2255 - STRUCT_OFFSET_OF (icmp6_router_solicitation_header_t, neighbor));
2256 h0->ip.protocol = IP_PROTOCOL_ICMP6;
2257 h0->ip.hop_limit = 255;
2259 /* set src/dst address as "unspecified" this marks this packet as internally generated rather than recieved */
2260 h0->ip.src_address.as_u64[0] = 0;
2261 h0->ip.src_address.as_u64[1] = 0;
2263 h0->ip.dst_address.as_u64[0] = 0;
2264 h0->ip.dst_address.as_u64[1] = 0;
2266 h0->neighbor.icmp.type = ICMP6_router_solicitation;
2268 if (PREDICT_FALSE(f == 0))
2270 f = vlib_get_frame_to_node (vm, ip6_icmp_router_solicitation_node.index);
2271 to_next = vlib_frame_vector_args (f);
2272 n_left_to_next = VLIB_FRAME_SIZE;
2281 if (PREDICT_FALSE(n_left_to_next == 0))
2283 f->n_vectors = n_this_frame;
2284 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2292 ASSERT(n_this_frame);
2293 f->n_vectors = n_this_frame;
2294 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2300 ip6_icmp_neighbor_discovery_event_process (vlib_main_t * vm,
2301 vlib_node_runtime_t * node,
2302 vlib_frame_t * frame)
2305 ip6_icmp_neighbor_discovery_event_data_t * event_data;
2307 /* init code here */
2311 vlib_process_wait_for_event_or_clock (vm, 1. /* seconds */);
2313 event_data = vlib_process_get_event_data (vm, &event_type);
2317 /* No events found: timer expired. */
2318 /* process interface list and send RAs as appropriate, update timer info */
2319 ip6_neighbor_process_timer_event (vm, node, frame);
2323 switch (event_type) {
2325 case ICMP6_ND_EVENT_INIT:
2336 _vec_len (event_data) = 0;
2339 return frame->n_vectors;
2342 VLIB_REGISTER_NODE (ip6_icmp_router_advertisement_node,static) = {
2343 .function = icmp6_router_advertisement,
2344 .name = "icmp6-router-advertisement",
2346 .vector_size = sizeof (u32),
2348 .format_trace = format_icmp6_input_trace,
2356 vlib_node_registration_t ip6_icmp_neighbor_discovery_event_node = {
2358 .function = ip6_icmp_neighbor_discovery_event_process,
2359 .name = "ip6-icmp-neighbor-discovery-event-process",
2360 .type = VLIB_NODE_TYPE_PROCESS,
2364 icmp6_neighbor_solicitation (vlib_main_t * vm,
2365 vlib_node_runtime_t * node,
2366 vlib_frame_t * frame)
2367 { return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame, /* is_solicitation */ 1); }
2370 icmp6_neighbor_advertisement (vlib_main_t * vm,
2371 vlib_node_runtime_t * node,
2372 vlib_frame_t * frame)
2373 { return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame, /* is_solicitation */ 0); }
2375 VLIB_REGISTER_NODE (ip6_icmp_neighbor_solicitation_node,static) = {
2376 .function = icmp6_neighbor_solicitation,
2377 .name = "icmp6-neighbor-solicitation",
2379 .vector_size = sizeof (u32),
2381 .format_trace = format_icmp6_input_trace,
2383 .n_next_nodes = ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
2385 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP] = "error-drop",
2386 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY] = "interface-output",
2390 VLIB_REGISTER_NODE (ip6_icmp_neighbor_advertisement_node,static) = {
2391 .function = icmp6_neighbor_advertisement,
2392 .name = "icmp6-neighbor-advertisement",
2394 .vector_size = sizeof (u32),
2396 .format_trace = format_icmp6_input_trace,
2404 /* API support functions */
2406 ip6_neighbor_ra_config(vlib_main_t * vm, u32 sw_if_index,
2407 u8 suppress, u8 managed, u8 other,
2408 u8 ll_option, u8 send_unicast, u8 cease,
2409 u8 use_lifetime, u32 lifetime,
2410 u32 initial_count, u32 initial_interval,
2411 u32 max_interval, u32 min_interval,
2414 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
2418 /* look up the radv_t information for this interface */
2419 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
2420 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2421 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
2426 ip6_radv_t * radv_info;
2427 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2429 if((max_interval != 0) && (min_interval ==0))
2430 min_interval = .75 * max_interval;
2432 max_interval = (max_interval != 0) ? ( (is_no) ? DEF_MAX_RADV_INTERVAL : max_interval) : radv_info->max_radv_interval;
2433 min_interval = (min_interval != 0) ? ( (is_no) ? DEF_MIN_RADV_INTERVAL : min_interval) : radv_info->min_radv_interval;
2434 lifetime = (use_lifetime != 0) ? ( (is_no) ? DEF_DEF_RTR_LIFETIME : lifetime) : radv_info->adv_router_lifetime_in_sec;
2438 if(lifetime > MAX_DEF_RTR_LIFETIME)
2439 lifetime = MAX_DEF_RTR_LIFETIME;
2441 if(lifetime <= max_interval)
2442 return VNET_API_ERROR_INVALID_VALUE;
2445 if(min_interval != 0)
2447 if((min_interval > .75 * max_interval) ||
2449 return VNET_API_ERROR_INVALID_VALUE;
2452 if((initial_count > MAX_INITIAL_RTR_ADVERTISEMENTS) ||
2453 (initial_interval > MAX_INITIAL_RTR_ADVERT_INTERVAL))
2454 return VNET_API_ERROR_INVALID_VALUE;
2457 if "flag" is set and is_no is true then restore default value else set value corresponding to "flag"
2458 if "flag" is clear don't change corresponding value
2460 radv_info->send_radv = (suppress != 0) ? ( (is_no != 0) ? 1 : 0 ) : radv_info->send_radv;
2461 radv_info->adv_managed_flag = ( managed != 0) ? ( (is_no) ? 0 : 1) : radv_info->adv_managed_flag;
2462 radv_info->adv_other_flag = (other != 0) ? ( (is_no) ? 0: 1) : radv_info->adv_other_flag;
2463 radv_info->adv_link_layer_address = ( ll_option != 0) ? ( (is_no) ? 1 : 0) : radv_info->adv_link_layer_address;
2464 radv_info->send_unicast = (send_unicast != 0) ? ( (is_no) ? 0 : 1) : radv_info->send_unicast;
2465 radv_info->cease_radv = ( cease != 0) ? ( (is_no) ? 0 : 1) : radv_info->cease_radv;
2467 radv_info->min_radv_interval = min_interval;
2468 radv_info->max_radv_interval = max_interval;
2469 radv_info->adv_router_lifetime_in_sec = lifetime;
2471 radv_info->initial_adverts_count =
2472 (initial_count != 0) ? ( (is_no) ? MAX_INITIAL_RTR_ADVERTISEMENTS : initial_count) : radv_info->initial_adverts_count ;
2473 radv_info->initial_adverts_interval =
2474 (initial_interval != 0) ? ( (is_no) ? MAX_INITIAL_RTR_ADVERT_INTERVAL : initial_interval) : radv_info->initial_adverts_interval;
2477 if((cease != 0) && (is_no))
2478 radv_info-> send_radv = 1;
2480 radv_info->initial_adverts_sent = radv_info->initial_adverts_count -1;
2481 radv_info->next_multicast_time = vlib_time_now (vm);
2482 radv_info->last_multicast_time = vlib_time_now (vm);
2483 radv_info->last_radv_time = 0;
2489 ip6_neighbor_ra_prefix(vlib_main_t * vm, u32 sw_if_index,
2490 ip6_address_t *prefix_addr, u8 prefix_len,
2491 u8 use_default, u32 val_lifetime, u32 pref_lifetime,
2492 u8 no_advertise, u8 off_link, u8 no_autoconfig, u8 no_onlink,
2495 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
2500 /* look up the radv_t information for this interface */
2501 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
2503 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2505 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
2509 f64 now = vlib_time_now (vm);
2510 ip6_radv_t * radv_info;
2511 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2513 /* prefix info add, delete or update */
2514 ip6_radv_prefix_t * prefix;
2516 /* lookup prefix info for this address on this interface */
2517 uword * p = mhash_get (&radv_info->address_to_prefix_index, prefix_addr);
2519 prefix = p ? pool_elt_at_index (radv_info->adv_prefixes_pool, p[0]) : 0;
2525 return VNET_API_ERROR_INVALID_VALUE; /* invalid prefix */
2527 if(prefix->prefix_len != prefix_len)
2528 return VNET_API_ERROR_INVALID_VALUE_2;
2530 /* FIXME - Should the DP do this or the CP ?*/
2531 /* do specific delete processing here before returning */
2532 /* try to remove from routing table */
2534 mhash_unset (&radv_info->address_to_prefix_index, prefix_addr,/* old_value */ 0);
2535 pool_put (radv_info->adv_prefixes_pool, prefix);
2537 radv_info->initial_adverts_sent = radv_info->initial_adverts_count -1;
2538 radv_info->next_multicast_time = vlib_time_now (vm);
2539 radv_info->last_multicast_time = vlib_time_now (vm);
2540 radv_info->last_radv_time = 0;
2544 /* adding or changing */
2549 pool_get (radv_info->adv_prefixes_pool, prefix);
2550 pi = prefix - radv_info->adv_prefixes_pool;
2551 mhash_set (&radv_info->address_to_prefix_index, prefix_addr, pi, /* old_value */ 0);
2553 memset(prefix, 0x0, sizeof(ip6_radv_prefix_t));
2555 prefix->prefix_len = prefix_len;
2556 clib_memcpy(&prefix->prefix, prefix_addr, sizeof(ip6_address_t));
2558 /* initialize default values */
2559 prefix->adv_on_link_flag = 1; /* L bit set */
2560 prefix->adv_autonomous_flag = 1; /* A bit set */
2561 prefix->adv_valid_lifetime_in_secs = DEF_ADV_VALID_LIFETIME;
2562 prefix->adv_pref_lifetime_in_secs = DEF_ADV_PREF_LIFETIME;
2563 prefix->enabled = 1;
2564 prefix->decrement_lifetime_flag = 1;
2565 prefix->deprecated_prefix_flag = 1;
2569 /* FIXME - Should the DP do this or the CP ?*/
2570 /* insert prefix into routing table as a connected prefix */
2579 if(prefix->prefix_len != prefix_len)
2580 return VNET_API_ERROR_INVALID_VALUE_2;
2584 /* FIXME - Should the DP do this or the CP ?*/
2585 /* remove from routing table if already there */
2589 if((val_lifetime == ~0) || (pref_lifetime == ~0))
2591 prefix->adv_valid_lifetime_in_secs = ~0;
2592 prefix->adv_pref_lifetime_in_secs = ~0;
2593 prefix->decrement_lifetime_flag = 0;
2597 prefix->adv_valid_lifetime_in_secs = val_lifetime;;
2598 prefix->adv_pref_lifetime_in_secs = pref_lifetime;
2601 /* copy remaining */
2602 prefix->enabled = !(no_advertise != 0);
2603 prefix->adv_on_link_flag = !((off_link != 0) || (no_onlink != 0));
2604 prefix->adv_autonomous_flag = !(no_autoconfig != 0);
2608 /* fill in the expiration times */
2609 prefix->valid_lifetime_expires = now + prefix->adv_valid_lifetime_in_secs;
2610 prefix->pref_lifetime_expires = now + prefix->adv_pref_lifetime_in_secs;
2612 radv_info->initial_adverts_sent = radv_info->initial_adverts_count -1;
2613 radv_info->next_multicast_time = vlib_time_now (vm);
2614 radv_info->last_multicast_time = vlib_time_now (vm);
2615 radv_info->last_radv_time = 0;
2621 ip6_neighbor_cmd(vlib_main_t * vm, unformat_input_t * main_input, vlib_cli_command_t * cmd)
2623 vnet_main_t * vnm = vnet_get_main();
2624 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
2625 clib_error_t * error = 0;
2627 u8 suppress = 0, managed = 0, other = 0;
2628 u8 suppress_ll_option = 0, send_unicast = 0, cease= 0;
2629 u8 use_lifetime = 0;
2630 u32 sw_if_index, ra_lifetime = 0, ra_initial_count = 0, ra_initial_interval = 0;
2631 u32 ra_max_interval = 0 , ra_min_interval = 0;
2633 unformat_input_t _line_input, * line_input = &_line_input;
2634 vnet_sw_interface_t * sw_if0;
2636 int add_radv_info = 1;
2637 __attribute__((unused)) ip6_radv_t * radv_info = 0;
2638 ip6_address_t ip6_addr;
2642 /* Get a line of input. */
2643 if (! unformat_user (main_input, unformat_line_input, line_input))
2646 /* get basic radv info for this interface */
2647 if(unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2650 if (unformat_user (line_input,
2651 unformat_vnet_sw_interface, vnm, &sw_if_index))
2654 ethernet_interface_t * eth_if0 = 0;
2656 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2657 if(sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2658 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2662 error = clib_error_return (0, "Interface must be of ethernet type");
2666 /* look up the radv_t information for this interface */
2667 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
2669 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2673 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2677 error = clib_error_return (0, "unknown interface %U'",
2678 format_unformat_error, line_input);
2684 error = clib_error_return (0, "invalid interface name %U'",
2685 format_unformat_error, line_input);
2690 /* get the rest of the command */
2691 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2693 if (unformat (line_input, "no"))
2695 else if(unformat (line_input, "prefix %U/%d",
2696 unformat_ip6_address, &ip6_addr,
2702 else if (unformat (line_input, "ra-managed-config-flag"))
2707 else if (unformat (line_input, "ra-other-config-flag"))
2712 else if (unformat (line_input, "ra-suppress") ||
2713 unformat (line_input, "ra-surpress"))
2718 else if (unformat (line_input, "ra-suppress-link-layer") ||
2719 unformat (line_input, "ra-surpress-link-layer"))
2721 suppress_ll_option = 1;
2724 else if (unformat (line_input, "ra-send-unicast"))
2729 else if (unformat (line_input, "ra-lifetime"))
2731 if (!unformat (line_input, "%d", &ra_lifetime))
2732 return(error = unformat_parse_error (line_input));
2736 else if (unformat (line_input, "ra-initial"))
2738 if (!unformat (line_input, "%d %d", &ra_initial_count, &ra_initial_interval))
2739 return(error = unformat_parse_error (line_input));
2742 else if (unformat (line_input, "ra-interval"))
2744 if (!unformat (line_input, "%d", &ra_max_interval))
2745 return(error = unformat_parse_error (line_input));
2747 if (!unformat (line_input, "%d", &ra_min_interval))
2748 ra_min_interval = 0;
2751 else if(unformat (line_input, "ra-cease"))
2757 return(unformat_parse_error (line_input));
2762 ip6_neighbor_ra_config(vm, sw_if_index,
2763 suppress, managed, other,
2764 suppress_ll_option, send_unicast, cease,
2765 use_lifetime, ra_lifetime,
2766 ra_initial_count, ra_initial_interval,
2767 ra_max_interval, ra_min_interval,
2772 u32 valid_lifetime_in_secs = 0;
2773 u32 pref_lifetime_in_secs = 0;
2774 u8 use_prefix_default_values = 0;
2775 u8 no_advertise = 0;
2777 u8 no_autoconfig = 0;
2780 /* get the rest of the command */
2781 while(unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2783 if(unformat (line_input, "default"))
2785 use_prefix_default_values = 1;
2788 else if(unformat (line_input, "infinite"))
2790 valid_lifetime_in_secs = ~0;
2791 pref_lifetime_in_secs = ~0;
2794 else if(unformat (line_input, "%d %d", &valid_lifetime_in_secs,
2795 &pref_lifetime_in_secs))
2802 /* get the rest of the command */
2803 while (!use_prefix_default_values &&
2804 unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2806 if(unformat (line_input, "no-advertise"))
2808 else if(unformat (line_input, "off-link"))
2810 else if(unformat (line_input, "no-autoconfig"))
2812 else if(unformat (line_input, "no-onlink"))
2815 return(unformat_parse_error (line_input));
2818 ip6_neighbor_ra_prefix(vm, sw_if_index,
2819 &ip6_addr, addr_len,
2820 use_prefix_default_values,
2821 valid_lifetime_in_secs,
2822 pref_lifetime_in_secs,
2830 unformat_free (line_input);
2837 ip6_print_addrs(vlib_main_t * vm,
2840 ip_lookup_main_t * lm = &ip6_main.lookup_main;
2843 for (i = 0; i < vec_len (addrs); i++)
2845 ip_interface_address_t * a = pool_elt_at_index(lm->if_address_pool, addrs[i]);
2846 ip6_address_t * address = ip_interface_address_get_address (lm, a);
2848 vlib_cli_output (vm, "\t\t%U/%d",
2849 format_ip6_address, address,
2854 static clib_error_t *
2855 show_ip6_interface_cmd (vlib_main_t * vm,
2856 unformat_input_t * input,
2857 vlib_cli_command_t * cmd)
2859 vnet_main_t * vnm = vnet_get_main();
2860 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
2861 clib_error_t * error = 0;
2866 if (unformat_user (input,
2867 unformat_vnet_sw_interface, vnm, &sw_if_index))
2871 /* look up the radv_t information for this interface */
2872 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
2874 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2878 ip_lookup_main_t * lm = &ip6_main.lookup_main;
2879 ip6_radv_t * radv_info;
2880 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2882 vlib_cli_output (vm, "%U is admin %s\n", format_vnet_sw_interface_name, vnm,
2883 vnet_get_sw_interface (vnm, sw_if_index),
2884 (vnet_sw_interface_is_admin_up (vnm, sw_if_index) ? "up" : "down"));
2887 u32 *link_scope = 0, *global_scope = 0;
2888 u32 *local_scope = 0, *unknown_scope = 0;
2889 ip_interface_address_t * a;
2891 vec_validate_init_empty (lm->if_address_pool_index_by_sw_if_index, sw_if_index, ~0);
2892 ai = lm->if_address_pool_index_by_sw_if_index[sw_if_index];
2894 while (ai != (u32)~0)
2896 a = pool_elt_at_index(lm->if_address_pool, ai);
2897 ip6_address_t * address = ip_interface_address_get_address (lm, a);
2899 if (ip6_address_is_link_local_unicast (address))
2900 vec_add1 (link_scope, ai);
2901 else if(ip6_address_is_global_unicast (address))
2902 vec_add1 (global_scope, ai);
2903 else if(ip6_address_is_local_unicast (address))
2904 vec_add1 (local_scope, ai);
2906 vec_add1 (unknown_scope, ai);
2908 ai = a->next_this_sw_interface;
2911 if (vec_len (link_scope))
2913 vlib_cli_output (vm, "\tLink-local address(es):\n");
2914 ip6_print_addrs (vm, link_scope);
2915 vec_free (link_scope);
2918 if (vec_len (local_scope))
2920 vlib_cli_output (vm, "\tLocal unicast address(es):\n");
2921 ip6_print_addrs (vm, local_scope);
2922 vec_free (local_scope);
2925 if (vec_len (global_scope))
2927 vlib_cli_output (vm, "\tGlobal unicast address(es):\n");
2928 ip6_print_addrs (vm, global_scope);
2929 vec_free (global_scope);
2932 if (vec_len (unknown_scope))
2934 vlib_cli_output (vm, "\tOther-scope address(es):\n");
2935 ip6_print_addrs (vm, unknown_scope);
2936 vec_free (unknown_scope);
2939 vlib_cli_output (vm, "\tJoined group address(es):\n");
2940 ip6_mldp_group_t *m;
2941 pool_foreach (m, radv_info->mldp_group_pool, ({
2942 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address, &m->mcast_address);
2945 vlib_cli_output (vm, "\tAdvertised Prefixes:\n");
2946 ip6_radv_prefix_t * p;
2947 pool_foreach (p, radv_info->adv_prefixes_pool, ({
2948 vlib_cli_output (vm, "\t\tprefix %U, length %d\n",
2949 format_ip6_address, &p->prefix, p->prefix_len);
2952 vlib_cli_output (vm, "\tMTU is %d\n", radv_info->adv_link_mtu);
2953 vlib_cli_output (vm, "\tICMP error messages are unlimited\n");
2954 vlib_cli_output (vm, "\tICMP redirects are disabled\n");
2955 vlib_cli_output (vm, "\tICMP unreachables are not sent\n");
2956 vlib_cli_output (vm, "\tND DAD is disabled\n");
2957 //vlib_cli_output (vm, "\tND reachable time is %d milliseconds\n",);
2958 vlib_cli_output (vm, "\tND advertised reachable time is %d\n",
2959 radv_info->adv_neighbor_reachable_time_in_msec);
2960 vlib_cli_output (vm, "\tND advertised retransmit interval is %d (msec)\n",
2961 radv_info->adv_time_in_msec_between_retransmitted_neighbor_solicitations);
2963 u32 ra_interval = radv_info->max_radv_interval;
2964 u32 ra_interval_min = radv_info->min_radv_interval;
2965 vlib_cli_output (vm, "\tND router advertisements are sent every %d seconds (min interval is %d)\n",
2966 ra_interval, ra_interval_min);
2967 vlib_cli_output (vm, "\tND router advertisements live for %d seconds\n",
2968 radv_info->adv_router_lifetime_in_sec);
2969 vlib_cli_output (vm, "\tHosts %s stateless autoconfig for addresses\n",
2970 (radv_info->adv_managed_flag) ? "use" :" don't use");
2971 vlib_cli_output (vm, "\tND router advertisements sent %d\n", radv_info->n_advertisements_sent);
2972 vlib_cli_output (vm, "\tND router solicitations received %d\n", radv_info->n_solicitations_rcvd);
2973 vlib_cli_output (vm, "\tND router solicitations dropped %d\n", radv_info->n_solicitations_dropped);
2977 error = clib_error_return (0, "IPv6 not enabled on interface",
2978 format_unformat_error, input);
2986 * This command is used to display various IPv6 attributes on a given
2990 * Example of how to display IPv6 settings:
2991 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
2992 * GigabitEthernet2/0/0 is admin up
2993 * Link-local address(es):
2995 * Joined group address(es):
3000 * Advertised Prefixes:
3001 * prefix fe80::fe:28ff:fe9c:75b3, length 64
3003 * ICMP error messages are unlimited
3004 * ICMP redirects are disabled
3005 * ICMP unreachables are not sent
3006 * ND DAD is disabled
3007 * ND advertised reachable time is 0
3008 * ND advertised retransmit interval is 0 (msec)
3009 * ND router advertisements are sent every 200 seconds (min interval is 150)
3010 * ND router advertisements live for 600 seconds
3011 * Hosts use stateless autoconfig for addresses
3012 * ND router advertisements sent 19336
3013 * ND router solicitations received 0
3014 * ND router solicitations dropped 0
3016 * Example of output if IPv6 is not enabled on the interface:
3017 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
3018 * show ip6 interface: IPv6 not enabled on interface
3022 VLIB_CLI_COMMAND (show_ip6_interface_command, static) = {
3023 .path = "show ip6 interface",
3024 .function = show_ip6_interface_cmd,
3025 .short_help = "show ip6 interface <interface>",
3030 disable_ip6_interface(vlib_main_t * vm,
3033 clib_error_t * error = 0;
3034 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3037 /* look up the radv_t information for this interface */
3038 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
3039 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3041 /* if not created - do nothing */
3044 vnet_main_t * vnm = vnet_get_main();
3045 ip6_radv_t * radv_info;
3047 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3049 /* check radv_info ref count for other ip6 addresses on this interface */
3050 if(radv_info->ref_count == 0 )
3052 /* essentially "disables" ipv6 on this interface */
3053 error = ip6_add_del_interface_address (vm, sw_if_index,
3054 &radv_info->link_local_address,
3055 radv_info->link_local_prefix_len,
3058 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, 0/* is_add */);
3065 ip6_interface_enabled(vlib_main_t * vm,
3068 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3071 /* look up the radv_t information for this interface */
3072 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
3074 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3080 enable_ip6_interface(vlib_main_t * vm,
3083 clib_error_t * error = 0;
3084 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3088 /* look up the radv_t information for this interface */
3089 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
3091 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3093 /* if not created yet */
3096 vnet_main_t * vnm = vnet_get_main();
3097 vnet_sw_interface_t * sw_if0;
3099 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
3100 if(sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
3102 ethernet_interface_t * eth_if0;
3104 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
3107 /* create radv_info. for this interface. This holds all the info needed for router adverts */
3108 ri = ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, is_add);
3112 ip6_radv_t * radv_info;
3113 ip6_address_t link_local_address;
3115 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3117 ip6_link_local_address_from_ethernet_mac_address (&link_local_address,
3120 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index);
3121 if(sw_if0->type == VNET_SW_INTERFACE_TYPE_SUB)
3123 /* make up an interface id */
3127 link_local_address.as_u64[0] = radv_info->randomizer;
3130 md5_add (&m, &link_local_address, 16);
3131 md5_finish (&m, digest);
3133 clib_memcpy(&link_local_address, digest, 16);
3135 radv_info->randomizer = link_local_address.as_u64[0];
3137 link_local_address.as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
3139 link_local_address.as_u8[8] &= 0xfd;
3142 /* essentially "enables" ipv6 on this interface */
3143 error = ip6_add_del_interface_address (vm, sw_if_index,
3144 &link_local_address,
3145 128 /* address width */,
3149 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, !is_add);
3152 radv_info->link_local_address = link_local_address;
3153 radv_info->link_local_prefix_len = 64;
3162 static clib_error_t *
3163 enable_ip6_interface_cmd (vlib_main_t * vm,
3164 unformat_input_t * input,
3165 vlib_cli_command_t * cmd)
3167 vnet_main_t * vnm = vnet_get_main();
3168 clib_error_t * error = 0;
3173 if (unformat_user (input,
3174 unformat_vnet_sw_interface, vnm, &sw_if_index))
3176 enable_ip6_interface(vm, sw_if_index);
3180 error = clib_error_return (0, "unknown interface\n'",
3181 format_unformat_error, input);
3188 * This command is used to enable IPv6 on a given interface.
3191 * Example of how enable IPv6 on a given interface:
3192 * @cliexcmd{enable ip6 interface GigabitEthernet2/0/0}
3195 VLIB_CLI_COMMAND (enable_ip6_interface_command, static) = {
3196 .path = "enable ip6 interface",
3197 .function = enable_ip6_interface_cmd,
3198 .short_help = "enable ip6 interface <interface>",
3202 static clib_error_t *
3203 disable_ip6_interface_cmd (vlib_main_t * vm,
3204 unformat_input_t * input,
3205 vlib_cli_command_t * cmd)
3207 vnet_main_t * vnm = vnet_get_main();
3208 clib_error_t * error = 0;
3213 if (unformat_user (input,
3214 unformat_vnet_sw_interface, vnm, &sw_if_index))
3216 error = disable_ip6_interface(vm, sw_if_index);
3220 error = clib_error_return (0, "unknown interface\n'",
3221 format_unformat_error, input);
3228 * This command is used to disable IPv6 on a given interface.
3231 * Example of how disable IPv6 on a given interface:
3232 * @cliexcmd{disable ip6 interface GigabitEthernet2/0/0}
3235 VLIB_CLI_COMMAND (disable_ip6_interface_command, static) = {
3236 .path = "disable ip6 interface",
3237 .function = disable_ip6_interface_cmd,
3238 .short_help = "disable ip6 interface <interface>",
3243 * This command is used to configure the neighbor discovery
3244 * parameters on a given interface. Use the '<em>show ip6 interface</em>'
3245 * command to display some of the current neighbor discovery parameters
3246 * on a given interface. This command has three formats:
3249 * <b>Format 1 - Router Advertisement Options:</b> (Only one can be entered in a single command)
3251 * '<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>'
3255 * <em>[no] ra-managed-config-flag</em> - Advertises in ICMPv6
3256 * router-advertisement messages to use stateful address
3257 * auto-configuration to obtain address information (sets the M-bit).
3258 * Default is the M-bit is not set and the '<em>no</em>' option
3259 * returns it to this default state.
3261 * <em>[no] ra-other-config-flag</em> - Indicates in ICMPv6
3262 * router-advertisement messages that hosts use stateful auto
3263 * configuration to obtain nonaddress related information (sets
3264 * the O-bit). Default is the O-bit is not set and the '<em>no</em>'
3265 * option returns it to this default state.
3267 * <em>[no] ra-suppress</em> - Disables sending ICMPv6 router-advertisement
3268 * messages. The '<em>no</em>' option implies to enable sending ICMPv6
3269 * router-advertisement messages.
3271 * <em>[no] ra-suppress-link-layer</em> - Indicates not to include the
3272 * optional source link-layer address in the ICMPv6 router-advertisement
3273 * messages. Default is to include the optional source link-layer address
3274 * and the '<em>no</em>' option returns it to this default state.
3276 * <em>[no] ra-send-unicast</em> - Use the source address of the
3277 * router-solicitation message if availiable. The default is to use
3278 * multicast address of all nodes, and the '<em>no</em>' option returns
3279 * it to this default state.
3281 * <em>[no] ra-lifetime <lifetime></em> - Advertises the lifetime of a
3282 * default router in ICMPv6 router-advertisement messages. The range is
3283 * from 0 to 9000 seconds. '<em><lifetime></em>' must be greater than
3284 * '<em><max-interval></em>'. The default value is 600 seconds and the
3285 * '<em>no</em>' option returns it to this default value.
3287 * <em>[no] ra-initial <cnt> <interval></em> - Number of initial ICMPv6
3288 * router-advertisement messages sent and the interval between each
3289 * message. Range for count is 1 - 3 and default is 3. Range for interval
3290 * is 1 to 16 seconds, and default is 16 seconds. The '<em>no</em>' option
3291 * returns both to their default value.
3293 * <em>[no] ra-interval <max-interval> [<min-interval>]</em> - Configures the
3294 * interval between sending ICMPv6 router-advertisement messages. The
3295 * range for max-interval is from 4 to 200 seconds. min-interval can not
3296 * be more than 75% of max-interval. If not set, min-interval will be
3297 * set to 75% of max-interval. The range for min-interval is from 3 to
3298 * 150 seconds. The '<em>no</em>' option returns both to their default
3301 * <em>[no] ra-cease</em> - Cease sending ICMPv6 router-advertisement messages.
3302 * The '<em>no</em>' options implies to start (or restart) sending
3303 * ICMPv6 router-advertisement messages.
3306 * <b>Format 2 - Prefix Options:</b>
3308 * '<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>'
3312 * <em>no</em> - All additional flags are ignored and the prefix is deleted.
3314 * <em><valid-lifetime> <pref-lifetime></em> - '<em><valid-lifetime></em>' is the
3315 * length of time in seconds during what the prefix is valid for the purpose of
3316 * on-link determination. Range is 7203 to 2592000 seconds and default is 2592000
3317 * seconds (30 days). '<em><pref-lifetime></em>' is the prefered-lifetime and is the
3318 * length of time in seconds during what addresses generated from the prefix remain
3319 * preferred. Range is 0 to 604800 seconds and default is 604800 seconds (7 days).
3321 * <em>infinite</em> - Both '<em><valid-lifetime></em>' and '<em><<pref-lifetime></em>'
3322 * are inifinte, no timeout.
3324 * <em>no-advertise</em> - Do not send full router address in prefix
3325 * advertisement. Default is to advertise (i.e. - This flag is off by default).
3327 * <em>off-link</em> - Prefix is off-link, clear L-bit in packet. Default is on-link
3328 * (i.e. - This flag is off and L-bit in packet is set by default and this prefix can
3329 * be used for on-link determination). '<em>no-onlink</em>' also controls the L-bit.
3331 * <em>no-autoconfig</em> - Do not use prefix for autoconfiguration, clear A-bit in packet.
3332 * Default is autoconfig (i.e. - This flag is off and A-bit in packet is set by default.
3334 * <em>no-onlink</em> - Do not use prefix for onlink determination, clear L-bit in packet.
3335 * Default is on-link (i.e. - This flag is off and L-bit in packet is set by default and
3336 * this prefix can be used for on-link determination). '<em>off-link</em>' also controls
3340 * <b>Format 3: - Default of Prefix:</b>
3342 * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> default</b></em>'
3344 * When a new prefix is added (or existing one is being overwritten) <em>default</em>
3345 * uses default values for the prefix. If <em>no</em> is used, the <em>default</em>
3346 * is ignored and the prefix is deleted.
3350 * Example of how set a router advertisement option:
3351 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 ra-interval 100 20}
3352 * Example of how to add a prefix:
3353 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 prefix fe80::fe:28ff:fe9c:75b3/64 infinite no-advertise}
3354 * Example of how to delete a prefix:
3355 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 no prefix fe80::fe:28ff:fe9c:75b3/64}
3358 VLIB_CLI_COMMAND (ip6_nd_command, static) = {
3360 .short_help = "ip6 nd <interface> ...",
3361 .function = ip6_neighbor_cmd,
3366 set_ip6_link_local_address(vlib_main_t * vm,
3368 ip6_address_t *address,
3371 clib_error_t * error = 0;
3372 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3374 ip6_radv_t * radv_info;
3375 vnet_main_t * vnm = vnet_get_main();
3377 if( !ip6_address_is_link_local_unicast (address))
3379 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_LINK_LOCAL;
3380 return(error = clib_error_return (0, "address not link-local",
3381 format_unformat_error));
3384 /* call enable ipv6 */
3385 enable_ip6_interface(vm, sw_if_index);
3387 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3391 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3393 /* save if link local address (overwrite default) */
3395 /* delete the old one */
3396 error = ip6_add_del_interface_address (vm, sw_if_index,
3397 &radv_info->link_local_address,
3398 radv_info->link_local_prefix_len /* address width */,
3403 /* add the new one */
3404 error = ip6_add_del_interface_address (vm, sw_if_index,
3406 address_length /* address width */,
3411 radv_info->link_local_address = *address;
3412 radv_info->link_local_prefix_len = address_length;
3418 vnm->api_errno = VNET_API_ERROR_IP6_NOT_ENABLED;
3419 error = clib_error_return (0, "ip6 not enabled for interface",
3420 format_unformat_error);
3426 set_ip6_link_local_address_cmd (vlib_main_t * vm,
3427 unformat_input_t * input,
3428 vlib_cli_command_t * cmd)
3430 vnet_main_t * vnm = vnet_get_main();
3431 clib_error_t * error = 0;
3433 ip6_address_t ip6_addr;
3436 if (unformat_user (input,
3437 unformat_vnet_sw_interface, vnm, &sw_if_index))
3439 /* get the rest of the command */
3440 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3442 if(unformat (input, "%U/%d",
3443 unformat_ip6_address, &ip6_addr,
3447 return(unformat_parse_error (input));
3450 error = set_ip6_link_local_address(vm,
3458 * This command is used to assign an IPv6 Link-local address to an
3459 * interface. This command will enable IPv6 on an interface if it
3460 * is not already enabled. Use the '<em>show ip6 interface</em>' command
3461 * to display the assigned Link-local address.
3464 * Example of how to assign an IPv6 Link-local address to an interface:
3465 * @cliexcmd{set ip6 link-local address GigabitEthernet2/0/0 FE80::AB8/64}
3468 VLIB_CLI_COMMAND (set_ip6_link_local_address_command, static) = {
3469 .path = "set ip6 link-local address",
3470 .short_help = "set ip6 link-local address <interface> <ip6-address>/<width>",
3471 .function = set_ip6_link_local_address_cmd,
3475 /* callback when an interface address is added or deleted */
3477 ip6_neighbor_add_del_interface_address (ip6_main_t * im,
3480 ip6_address_t * address,
3482 u32 if_address_index,
3485 vnet_main_t * vnm = vnet_get_main();
3486 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3488 vlib_main_t * vm = vnm->vlib_main;
3489 ip6_radv_t * radv_info;
3491 ip6_mldp_group_t *mcast_group_info;
3493 /* create solicited node multicast address for this interface adddress */
3494 ip6_set_solicited_node_multicast_address (&a, 0);
3496 a.as_u8[0xd] = address->as_u8[0xd];
3497 a.as_u8[0xe] = address->as_u8[0xe];
3498 a.as_u8[0xf] = address->as_u8[0xf];
3502 /* try to create radv_info - does nothing if ipv6 already enabled */
3503 enable_ip6_interface(vm, sw_if_index);
3505 /* look up the radv_t information for this interface */
3506 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
3507 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3511 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3514 if( !ip6_address_is_link_local_unicast (address))
3515 radv_info->ref_count++;
3517 /* lookup prefix info for this address on this interface */
3518 uword * p = mhash_get (&radv_info->address_to_mldp_index, &a);
3519 mcast_group_info = p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
3521 /* add -solicted node multicast address */
3522 if(!mcast_group_info)
3526 pool_get (radv_info->mldp_group_pool, mcast_group_info);
3528 mi = mcast_group_info - radv_info->mldp_group_pool;
3529 mhash_set (&radv_info->address_to_mldp_index, &a, mi, /* old_value */ 0);
3531 mcast_group_info->type = 4;
3532 mcast_group_info->mcast_source_address_pool = 0;
3533 mcast_group_info->num_sources = 0;
3534 clib_memcpy(&mcast_group_info->mcast_address, &a, sizeof(ip6_address_t));
3542 /* look up the radv_t information for this interface */
3543 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
3544 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3548 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3550 /* lookup prefix info for this address on this interface */
3551 uword * p = mhash_get (&radv_info->address_to_mldp_index, &a);
3552 mcast_group_info = p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
3554 if(mcast_group_info)
3556 mhash_unset (&radv_info->address_to_mldp_index, &a,/* old_value */ 0);
3557 pool_put (radv_info->mldp_group_pool, mcast_group_info);
3560 /* if interface up send MLDP "report" */
3561 radv_info->all_routers_mcast = 0;
3564 if( !ip6_address_is_link_local_unicast (address))
3565 radv_info->ref_count--;
3570 clib_error_t *ip6_set_neighbor_limit (u32 neighbor_limit)
3572 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3574 nm->limit_neighbor_cache_size = neighbor_limit;
3578 static clib_error_t * ip6_neighbor_init (vlib_main_t * vm)
3580 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3581 ip6_main_t * im = &ip6_main;
3583 mhash_init (&nm->neighbor_index_by_key,
3584 /* value size */ sizeof (uword),
3585 /* key size */ sizeof (ip6_neighbor_key_t));
3587 icmp6_register_type (vm, ICMP6_neighbor_solicitation, ip6_icmp_neighbor_solicitation_node.index);
3588 icmp6_register_type (vm, ICMP6_neighbor_advertisement, ip6_icmp_neighbor_advertisement_node.index);
3589 icmp6_register_type (vm, ICMP6_router_solicitation, ip6_icmp_router_solicitation_node.index);
3590 icmp6_register_type (vm, ICMP6_router_advertisement, ip6_icmp_router_advertisement_node.index);
3592 /* handler node for ip6 neighbor discovery events and timers */
3593 vlib_register_node (vm, &ip6_icmp_neighbor_discovery_event_node);
3595 /* add call backs */
3596 ip6_add_del_interface_address_callback_t cb;
3597 memset(&cb, 0x0, sizeof(ip6_add_del_interface_address_callback_t));
3599 /* when an interface address changes... */
3600 cb.function = ip6_neighbor_add_del_interface_address;
3601 cb.function_opaque = 0;
3602 vec_add1 (im->add_del_interface_address_callbacks, cb);
3604 mhash_init (&nm->pending_resolutions_by_address,
3605 /* value size */ sizeof (uword),
3606 /* key size */ sizeof (ip6_address_t));
3608 mhash_init (&nm->mac_changes_by_address,
3609 /* value size */ sizeof (uword),
3610 /* key size */ sizeof (ip6_address_t));
3612 /* default, configurable */
3613 nm->limit_neighbor_cache_size = 50000;
3616 /* $$$$ Hack fix for today */
3617 vec_validate_init_empty
3618 (im->discover_neighbor_next_index_by_hw_if_index, 32, 0 /* drop */);
3624 VLIB_INIT_FUNCTION (ip6_neighbor_init);
3627 void vnet_register_ip6_neighbor_resolution_event (vnet_main_t * vnm,
3633 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3634 ip6_address_t * address = address_arg;
3636 pending_resolution_t * pr;
3638 pool_get (nm->pending_resolutions, pr);
3640 pr->next_index = ~0;
3641 pr->node_index = node_index;
3642 pr->type_opaque = type_opaque;
3645 p = mhash_get (&nm->pending_resolutions_by_address, address);
3648 /* Insert new resolution at the head of the list */
3649 pr->next_index = p[0];
3650 mhash_unset (&nm->pending_resolutions_by_address, address, 0);
3653 mhash_set (&nm->pending_resolutions_by_address, address,
3654 pr - nm->pending_resolutions, 0 /* old value */);
3657 int vnet_add_del_ip6_nd_change_event (vnet_main_t * vnm,
3658 void * data_callback,
3666 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3667 ip6_address_t * address = address_arg;
3669 pending_resolution_t * mc;
3670 void (*fp)(u32, u8 *) = data_callback;
3674 pool_get (nm->mac_changes, mc);
3676 mc->next_index = ~0;
3677 mc->node_index = node_index;
3678 mc->type_opaque = type_opaque;
3680 mc->data_callback = data_callback;
3683 p = mhash_get (&nm->mac_changes_by_address, address);
3686 /* Insert new resolution at the head of the list */
3687 mc->next_index = p[0];
3688 mhash_unset (&nm->mac_changes_by_address, address, 0);
3691 mhash_set (&nm->mac_changes_by_address, address,
3692 mc - nm->mac_changes, 0);
3698 pending_resolution_t * mc_last = 0;
3700 p = mhash_get (&nm->mac_changes_by_address, address);
3702 return VNET_API_ERROR_NO_SUCH_ENTRY;
3706 while (index != (u32)~0)
3708 mc = pool_elt_at_index (nm->mac_changes, index);
3709 if (mc->node_index == node_index &&
3710 mc->type_opaque == type_opaque &&
3713 /* Clients may need to clean up pool entries, too */
3715 (*fp)(mc->data, 0 /* no new mac addrs */);
3718 mhash_unset (&nm->mac_changes_by_address, address, 0);
3719 if (mc->next_index != ~0)
3720 mhash_set (&nm->mac_changes_by_address, address,
3722 pool_put (nm->mac_changes, mc);
3728 mc_last->next_index = mc->next_index;
3729 pool_put (nm->mac_changes, mc);
3734 index = mc->next_index;
3737 return VNET_API_ERROR_NO_SUCH_ENTRY;
3741 int vnet_ip6_nd_term (vlib_main_t * vm,
3742 vlib_node_runtime_t * node,
3744 ethernet_header_t * eth,
3750 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3751 icmp6_neighbor_solicitation_or_advertisement_header_t * ndh;
3752 pending_resolution_t * mc;
3755 ndh = ip6_next_header (ip);
3756 if (ndh->icmp.type != ICMP6_neighbor_solicitation &&
3757 ndh->icmp.type != ICMP6_neighbor_advertisement)
3760 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
3761 (p0->flags & VLIB_BUFFER_IS_TRACED)))
3763 u8 *t0 = vlib_add_trace (vm, node, p0,
3764 sizeof (icmp6_input_trace_t));
3765 clib_memcpy (t0, ip, sizeof (icmp6_input_trace_t));
3768 /* Check if anyone want ND events for L2 BDs */
3769 p = mhash_get (&nm->mac_changes_by_address, &ip6a_zero);
3770 if (p && shg == 0 && /* Only SHG 0 interface which is more likely local */
3771 !ip6_address_is_link_local_unicast (&ip->src_address))
3773 u32 next_index = p[0];
3774 while (next_index != (u32)~0)
3776 int (*fp)(u32, u8 *, u32, ip6_address_t *);
3778 mc = pool_elt_at_index (nm->mac_changes, next_index);
3779 fp = mc->data_callback;
3780 /* Call the callback, return 1 to suppress dup events */
3781 if (fp) rv = (*fp)(mc->data,
3785 /* Signal the resolver process */
3787 vlib_process_signal_event (vm, mc->node_index,
3790 next_index = mc->next_index;
3794 /* Check if MAC entry exsist for solicited target IP */
3795 if (ndh->icmp.type == ICMP6_neighbor_solicitation)
3797 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t * opt;
3798 l2_bridge_domain_t *bd_config;
3801 opt = (void *) (ndh + 1);
3802 if ((opt->header.type !=
3803 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address) ||
3804 (opt->header.n_data_u64s != 1))
3805 return 0; /* source link layer address option not present */
3807 bd_config = vec_elt_at_index (l2input_main.bd_configs, bd_index);
3808 macp = (u8 *) hash_get_mem (bd_config->mac_by_ip6, &ndh->target_address);
3810 { /* found ip-mac entry, generate eighbor advertisement response */
3812 vlib_node_runtime_t * error_node =
3813 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
3814 ip->dst_address = ip->src_address;
3815 ip->src_address = ndh->target_address;
3816 ip->hop_limit = 255;
3818 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
3819 clib_memcpy (opt->ethernet_address, macp, 6);
3820 ndh->icmp.type = ICMP6_neighbor_advertisement;
3821 ndh->advertisement_flags = clib_host_to_net_u32
3822 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED |
3823 ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
3824 ndh->icmp.checksum = 0;
3825 ndh->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum(vm, p0, ip,
3827 clib_memcpy(eth->dst_address, eth->src_address, 6);
3828 clib_memcpy(eth->src_address, macp, 6);
3829 vlib_error_count (vm, error_node->node_index,
3830 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX, 1);
3840 ethernet_ndp_change_mac (vlib_main_t * vm, u32 sw_if_index)
3842 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3846 pool_foreach (n, nm->neighbor_pool, ({
3847 if (n->key.sw_if_index == sw_if_index)
3849 adj_nbr_walk_nh6 (sw_if_index,
3850 &n->key.ip6_address,
3851 ip6_nd_mk_complete_walk, n);