2 * ip/ip6_neighbor.c: IP6 neighbor handling
4 * Copyright (c) 2010 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
18 #include <vnet/ip/ip.h>
19 #include <vnet/ethernet/ethernet.h>
20 #include <vppinfra/mhash.h>
21 #include <vppinfra/md5.h>
22 #include <vnet/adj/adj.h>
23 #include <vnet/fib/fib_table.h>
24 #include <vnet/fib/ip6_fib.h>
28 * @brief IPv6 Neighbor Adjacency and Neighbor Discovery.
30 * The files contains the API and CLI code for managing IPv6 neighbor
31 * adjacency tables and neighbor discovery logic.
35 ip6_address_t ip6_address;
40 /* can't use sizeof link_layer_address, that's 8 */
41 #define ETHER_MAC_ADDR_LEN 6
44 ip6_neighbor_key_t key;
45 u8 link_layer_address[8];
47 #define IP6_NEIGHBOR_FLAG_STATIC (1 << 0)
48 #define IP6_NEIGHBOR_FLAG_DYNAMIC (2 << 0)
49 u64 cpu_time_last_updated;
50 fib_node_index_t fib_entry_index;
53 /* advertised prefix option */
55 /* basic advertised information */
59 int adv_autonomous_flag;
60 u32 adv_valid_lifetime_in_secs;
61 u32 adv_pref_lifetime_in_secs;
63 /* advertised values are computed from these times if decrementing */
64 f64 valid_lifetime_expires;
65 f64 pref_lifetime_expires;
67 /* local information */
69 int deprecated_prefix_flag;
70 int decrement_lifetime_flag;
72 #define MIN_ADV_VALID_LIFETIME 7203 /* seconds */
73 #define DEF_ADV_VALID_LIFETIME 2592000
74 #define DEF_ADV_PREF_LIFETIME 604800
76 /* extensions are added here, mobile, DNS etc.. */
81 /* group information */
83 ip6_address_t mcast_address;
85 ip6_address_t *mcast_source_address_pool;
88 /* configured router advertisement information per ipv6 interface */
91 /* advertised config information, zero means unspecified */
95 u16 adv_router_lifetime_in_sec;
96 u32 adv_neighbor_reachable_time_in_msec;
97 u32 adv_time_in_msec_between_retransmitted_neighbor_solicitations;
102 /* source link layer option */
103 u8 link_layer_address[8];
104 u8 link_layer_addr_len;
107 ip6_radv_prefix_t * adv_prefixes_pool;
109 /* Hash table mapping address to index in interface advertised prefix pool. */
110 mhash_t address_to_prefix_index;
112 /* MLDP group information */
113 ip6_mldp_group_t * mldp_group_pool;
115 /* Hash table mapping address to index in mldp address pool. */
116 mhash_t address_to_mldp_index;
118 /* local information */
121 int send_radv; /* radv on/off on this interface - set by config */
122 int cease_radv; /* we are ceasing to send - set byf config */
124 int adv_link_layer_address;
126 int failed_device_check;
127 int all_routers_mcast;
131 adj_index_t all_nodes_adj_index;
132 adj_index_t all_routers_adj_index;
133 adj_index_t all_mldv2_routers_adj_index;
135 /* timing information */
136 #define DEF_MAX_RADV_INTERVAL 200
137 #define DEF_MIN_RADV_INTERVAL .75 * DEF_MAX_RADV_INTERVAL
138 #define DEF_CURR_HOP_LIMIT 64
139 #define DEF_DEF_RTR_LIFETIME 3 * DEF_MAX_RADV_INTERVAL
140 #define MAX_DEF_RTR_LIFETIME 9000
142 #define MAX_INITIAL_RTR_ADVERT_INTERVAL 16 /* seconds */
143 #define MAX_INITIAL_RTR_ADVERTISEMENTS 3 /*transmissions */
144 #define MIN_DELAY_BETWEEN_RAS 3 /* seconds */
145 #define MAX_DELAY_BETWEEN_RAS 1800 /* seconds */
146 #define MAX_RA_DELAY_TIME .5 /* seconds */
148 f64 max_radv_interval;
149 f64 min_radv_interval;
150 f64 min_delay_between_radv;
151 f64 max_delay_between_radv;
152 f64 max_rtr_default_lifetime;
155 f64 last_multicast_time;
156 f64 next_multicast_time;
159 u32 initial_adverts_count;
160 f64 initial_adverts_interval;
161 u32 initial_adverts_sent;
164 u32 n_advertisements_sent;
165 u32 n_solicitations_rcvd;
166 u32 n_solicitations_dropped;
168 /* Link local address to use (defaults to underlying physical for logical interfaces */
169 ip6_address_t link_local_address;
170 u8 link_local_prefix_len;
179 /* Used for nd event notification only */
180 void * data_callback;
182 } pending_resolution_t;
186 /* Hash tables mapping name to opcode. */
187 uword * opcode_by_name;
189 /* lite beer "glean" adjacency handling */
190 mhash_t pending_resolutions_by_address;
191 pending_resolution_t * pending_resolutions;
193 /* Mac address change notification */
194 mhash_t mac_changes_by_address;
195 pending_resolution_t * mac_changes;
197 u32 * neighbor_input_next_index_by_hw_if_index;
199 ip6_neighbor_t * neighbor_pool;
201 mhash_t neighbor_index_by_key;
203 u32 * if_radv_pool_index_by_sw_if_index;
205 ip6_radv_t * if_radv_pool;
207 /* Neighbor attack mitigation */
208 u32 limit_neighbor_cache_size;
209 u32 neighbor_delete_rotor;
211 } ip6_neighbor_main_t;
213 static ip6_neighbor_main_t ip6_neighbor_main;
214 static ip6_address_t ip6a_zero; /* ip6 address 0 */
216 static u8 * format_ip6_neighbor_ip6_entry (u8 * s, va_list * va)
218 vlib_main_t * vm = va_arg (*va, vlib_main_t *);
219 ip6_neighbor_t * n = va_arg (*va, ip6_neighbor_t *);
220 vnet_main_t * vnm = vnet_get_main();
221 vnet_sw_interface_t * si;
225 return format (s, "%=12s%=20s%=6s%=20s%=40s", "Time", "Address", "Flags", "Link layer", "Interface");
227 if (n->flags & IP6_NEIGHBOR_FLAG_DYNAMIC)
228 flags = format(flags, "D");
230 if (n->flags & IP6_NEIGHBOR_FLAG_STATIC)
231 flags = format(flags, "S");
233 si = vnet_get_sw_interface (vnm, n->key.sw_if_index);
234 s = format (s, "%=12U%=20U%=6s%=20U%=40U",
235 format_vlib_cpu_time, vm, n->cpu_time_last_updated,
236 format_ip6_address, &n->key.ip6_address,
237 flags ? (char *)flags : "",
238 format_ethernet_address, n->link_layer_address,
239 format_vnet_sw_interface_name, vnm, si);
245 static clib_error_t *
246 ip6_neighbor_sw_interface_up_down (vnet_main_t * vnm,
250 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
253 if (! (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
255 u32 i, * to_delete = 0;
257 pool_foreach (n, nm->neighbor_pool, ({
258 if (n->key.sw_if_index == sw_if_index)
259 vec_add1 (to_delete, n - nm->neighbor_pool);
262 for (i = 0; i < vec_len (to_delete); i++)
264 n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
265 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
266 fib_table_entry_delete_index (n->fib_entry_index, FIB_SOURCE_ADJ);
267 pool_put (nm->neighbor_pool, n);
270 vec_free (to_delete);
276 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_neighbor_sw_interface_up_down);
278 static void unset_random_neighbor_entry (void)
280 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
281 vnet_main_t * vnm = vnet_get_main();
282 vlib_main_t * vm = vnm->vlib_main;
286 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
287 nm->neighbor_delete_rotor = index;
289 /* Try again from elt 0, could happen if an intfc goes down */
292 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
293 nm->neighbor_delete_rotor = index;
296 /* Nothing left in the pool */
300 e = pool_elt_at_index (nm->neighbor_pool, index);
302 vnet_unset_ip6_ethernet_neighbor (vm, e->key.sw_if_index,
304 e->link_layer_address,
311 u8 link_layer_address[6];
314 } ip6_neighbor_set_unset_rpc_args_t;
316 static void ip6_neighbor_set_unset_rpc_callback
317 ( ip6_neighbor_set_unset_rpc_args_t * a);
319 static void set_unset_ip6_neighbor_rpc
323 u8 *link_layer_addreess,
324 int is_add, int is_static)
326 ip6_neighbor_set_unset_rpc_args_t args;
327 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
329 args.sw_if_index = sw_if_index;
330 args.is_add = is_add;
331 args.is_static = is_static;
332 clib_memcpy (&args.addr, a, sizeof (*a));
333 clib_memcpy (args.link_layer_address, link_layer_addreess, 6);
335 vl_api_rpc_call_main_thread (ip6_neighbor_set_unset_rpc_callback,
336 (u8 *) &args, sizeof (args));
340 ip6_nbr_probe (ip_adjacency_t *adj)
342 icmp6_neighbor_solicitation_header_t * h;
343 vnet_main_t * vnm = vnet_get_main();
344 ip6_main_t * im = &ip6_main;
345 ip_interface_address_t * ia;
346 ip6_address_t * dst, *src;
347 vnet_hw_interface_t * hi;
348 vnet_sw_interface_t * si;
354 vm = vlib_get_main();
356 si = vnet_get_sw_interface(vnm, adj->rewrite_header.sw_if_index);
357 dst = &adj->sub_type.nbr.next_hop.ip6;
359 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
363 src = ip6_interface_address_matching_destination(im, dst,
364 adj->rewrite_header.sw_if_index,
371 h = vlib_packet_template_get_packet(vm,
372 &im->discover_neighbor_packet_template,
375 hi = vnet_get_sup_hw_interface(vnm, adj->rewrite_header.sw_if_index);
377 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
378 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
379 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
380 h->ip.src_address = src[0];
381 h->neighbor.target_address = dst[0];
383 clib_memcpy (h->link_layer_option.ethernet_address,
385 vec_len(hi->hw_address));
387 h->neighbor.icmp.checksum =
388 ip6_tcp_udp_icmp_compute_checksum(vm, 0, &h->ip, &bogus_length);
389 ASSERT(bogus_length == 0);
391 b = vlib_get_buffer (vm, bi);
392 vnet_buffer (b)->sw_if_index[VLIB_RX] =
393 vnet_buffer (b)->sw_if_index[VLIB_TX] =
394 adj->rewrite_header.sw_if_index;
396 /* Add encapsulation string for software interface (e.g. ethernet header). */
397 vnet_rewrite_one_header(adj[0], h, sizeof (ethernet_header_t));
398 vlib_buffer_advance(b, -adj->rewrite_header.data_bytes);
401 vlib_frame_t * f = vlib_get_frame_to_node(vm, hi->output_node_index);
402 u32 * to_next = vlib_frame_vector_args(f);
405 vlib_put_frame_to_node(vm, hi->output_node_index, f);
410 ip6_nd_mk_complete (adj_index_t ai, ip6_neighbor_t * nbr)
412 adj_nbr_update_rewrite (ai, ADJ_NBR_REWRITE_FLAG_COMPLETE,
413 ethernet_build_rewrite (vnet_get_main (),
414 nbr->key.sw_if_index,
415 adj_get_link_type(ai),
416 nbr->link_layer_address));
420 ip6_nd_mk_incomplete (adj_index_t ai, ip6_neighbor_t * nbr)
422 adj_nbr_update_rewrite (
424 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
425 ethernet_build_rewrite (vnet_get_main (),
426 nbr->key.sw_if_index,
427 adj_get_link_type(ai),
428 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
431 #define IP6_NBR_MK_KEY(k, sw_if_index, addr) \
433 k.sw_if_index = sw_if_index; \
434 k.ip6_address = *addr; \
438 static ip6_neighbor_t *
439 ip6_nd_find (u32 sw_if_index,
440 const ip6_address_t * addr)
442 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
443 ip6_neighbor_t * n = NULL;
444 ip6_neighbor_key_t k;
447 IP6_NBR_MK_KEY(k, sw_if_index, addr);
449 p = mhash_get (&nm->neighbor_index_by_key, &k);
451 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
458 ip6_nd_mk_complete_walk (adj_index_t ai, void *ctx)
460 ip6_neighbor_t *nbr = ctx;
462 ip6_nd_mk_complete (ai, nbr);
464 return (ADJ_WALK_RC_CONTINUE);
468 ip6_nd_mk_incomplete_walk (adj_index_t ai, void *ctx)
470 ip6_neighbor_t *nbr = ctx;
472 ip6_nd_mk_incomplete (ai, nbr);
474 return (ADJ_WALK_RC_CONTINUE);
478 ip6_ethernet_update_adjacency (vnet_main_t * vnm,
487 nbr = ip6_nd_find (sw_if_index, &adj->sub_type.nbr.next_hop.ip6);
491 adj_nbr_walk_nh6 (sw_if_index, &nbr->key.ip6_address,
492 ip6_nd_mk_complete_walk, nbr);
497 * no matching ND entry.
498 * construct the rewrite required to for an ND packet, and stick
499 * that in the adj's pipe to smoke.
501 adj_nbr_update_rewrite (ai,
502 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
503 ethernet_build_rewrite (vnm,
506 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
509 * since the FIB has added this adj for a route, it makes sense it may
510 * want to forward traffic sometime soon. Let's send a speculative ND.
511 * just one. If we were to do periodically that wouldn't be bad either,
512 * but that's more code than i'm prepared to write at this time for
513 * relatively little reward.
520 vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
523 u8 * link_layer_address,
524 uword n_bytes_link_layer_address,
527 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
528 ip6_neighbor_key_t k;
529 ip6_neighbor_t * n = 0;
530 int make_new_nd_cache_entry=1;
533 pending_resolution_t * pr, * mc;
535 if (os_get_cpu_number())
537 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
538 1 /* set new neighbor */, is_static);
542 k.sw_if_index = sw_if_index;
543 k.ip6_address = a[0];
546 p = mhash_get (&nm->neighbor_index_by_key, &k);
548 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
549 /* Refuse to over-write static neighbor entry. */
551 (n->flags & IP6_NEIGHBOR_FLAG_STATIC))
553 make_new_nd_cache_entry = 0;
556 if (make_new_nd_cache_entry) {
559 .fp_proto = FIB_PROTOCOL_IP6,
561 .ip6 = k.ip6_address,
566 pool_get (nm->neighbor_pool, n);
567 mhash_set (&nm->neighbor_index_by_key, &k, n - nm->neighbor_pool,
571 clib_memcpy (n->link_layer_address,
573 n_bytes_link_layer_address);
576 * create the adj-fib. the entry in the FIB table for and to the peer.
578 fib_index = ip6_main.fib_index_by_sw_if_index[n->key.sw_if_index];
580 fib_table_entry_update_one_path(fib_index,
589 NULL, // no label stack
590 FIB_ROUTE_PATH_FLAG_NONE);
595 * prevent a DoS attack from the data-plane that
596 * spams us with no-op updates to the MAC address
598 if (0 == memcmp(n->link_layer_address,
600 n_bytes_link_layer_address))
603 clib_memcpy (n->link_layer_address,
605 n_bytes_link_layer_address);
608 /* Update time stamp and flags. */
609 n->cpu_time_last_updated = clib_cpu_time_now ();
611 n->flags |= IP6_NEIGHBOR_FLAG_STATIC;
613 n->flags |= IP6_NEIGHBOR_FLAG_DYNAMIC;
615 adj_nbr_walk_nh6 (sw_if_index,
617 ip6_nd_mk_complete_walk, n);
619 /* Customer(s) waiting for this address to be resolved? */
620 p = mhash_get (&nm->pending_resolutions_by_address, a);
625 while (next_index != (u32)~0)
627 pr = pool_elt_at_index (nm->pending_resolutions, next_index);
628 vlib_process_signal_event (vm, pr->node_index,
631 next_index = pr->next_index;
632 pool_put (nm->pending_resolutions, pr);
635 mhash_unset (&nm->pending_resolutions_by_address, a, 0);
638 /* Customer(s) requesting ND event for this address? */
639 p = mhash_get (&nm->mac_changes_by_address, a);
644 while (next_index != (u32)~0)
646 int (*fp)(u32, u8 *, u32, ip6_address_t *);
648 mc = pool_elt_at_index (nm->mac_changes, next_index);
649 fp = mc->data_callback;
651 /* Call the user's data callback, return 1 to suppress dup events */
653 rv = (*fp)(mc->data, link_layer_address, sw_if_index, &ip6a_zero);
655 * Signal the resolver process, as long as the user
656 * says they want to be notified
659 vlib_process_signal_event (vm, mc->node_index,
662 next_index = mc->next_index;
670 vnet_unset_ip6_ethernet_neighbor (vlib_main_t * vm,
673 u8 * link_layer_address,
674 uword n_bytes_link_layer_address)
676 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
677 ip6_neighbor_key_t k;
682 if (os_get_cpu_number())
684 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
689 k.sw_if_index = sw_if_index;
690 k.ip6_address = a[0];
693 p = mhash_get (&nm->neighbor_index_by_key, &k);
700 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
702 adj_nbr_walk_nh6 (sw_if_index,
704 ip6_nd_mk_incomplete_walk,
707 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
708 fib_table_entry_delete_index (n->fib_entry_index, FIB_SOURCE_ADJ);
709 pool_put (nm->neighbor_pool, n);
715 static void ip6_neighbor_set_unset_rpc_callback
716 ( ip6_neighbor_set_unset_rpc_args_t * a)
718 vlib_main_t * vm = vlib_get_main();
720 vnet_set_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
721 a->link_layer_address, 6, a->is_static);
723 vnet_unset_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
724 a->link_layer_address, 6);
728 ip6_neighbor_sort (void *a1, void *a2)
730 vnet_main_t * vnm = vnet_get_main();
731 ip6_neighbor_t * n1 = a1, * n2 = a2;
733 cmp = vnet_sw_interface_compare (vnm, n1->key.sw_if_index,
734 n2->key.sw_if_index);
736 cmp = ip6_address_compare (&n1->key.ip6_address, &n2->key.ip6_address);
740 static clib_error_t *
741 show_ip6_neighbors (vlib_main_t * vm,
742 unformat_input_t * input,
743 vlib_cli_command_t * cmd)
745 vnet_main_t * vnm = vnet_get_main();
746 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
747 ip6_neighbor_t * n, * ns;
748 clib_error_t * error = 0;
751 /* Filter entries by interface if given. */
753 (void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index);
756 pool_foreach (n, nm->neighbor_pool, ({ vec_add1 (ns, n[0]); }));
759 vec_sort_with_function (ns, ip6_neighbor_sort);
760 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, 0);
761 vec_foreach (n, ns) {
762 if (sw_if_index != ~0 && n->key.sw_if_index != sw_if_index)
764 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, n);
773 * This command is used to display the adjacent IPv6 hosts found via
774 * neighbor discovery. Optionally, limit the output to the specified
778 * Example of how to display the IPv6 neighbor adjacency table:
779 * @cliexstart{show ip6 neighbors}
780 * Time Address Flags Link layer Interface
781 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
782 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
783 * 886.6654 ::1:1:c:0:9 S 02:fe:e4:45:27:5b GigabitEthernet3/0/0
785 * Example of how to display the IPv6 neighbor adjacency table for given interface:
786 * @cliexstart{show ip6 neighbors GigabitEthernet2/0/0}
787 * Time Address Flags Link layer Interface
788 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
789 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
793 VLIB_CLI_COMMAND (show_ip6_neighbors_command, static) = {
794 .path = "show ip6 neighbors",
795 .function = show_ip6_neighbors,
796 .short_help = "show ip6 neighbors [<interface>]",
800 static clib_error_t *
801 set_ip6_neighbor (vlib_main_t * vm,
802 unformat_input_t * input,
803 vlib_cli_command_t * cmd)
805 vnet_main_t * vnm = vnet_get_main();
813 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
815 /* intfc, ip6-address, mac-address */
816 if (unformat (input, "%U %U %U",
817 unformat_vnet_sw_interface, vnm, &sw_if_index,
818 unformat_ip6_address, &addr,
819 unformat_ethernet_address, mac_address))
822 else if (unformat (input, "delete") || unformat (input, "del"))
824 else if (unformat (input, "static"))
831 return clib_error_return (0, "Missing interface, ip6 or hw address");
834 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
835 mac_address, sizeof(mac_address), is_static);
837 vnet_unset_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
838 mac_address, sizeof(mac_address));
843 * This command is used to manually add an entry to the IPv6 neighbor
844 * adjacency table. Optionally, the entry can be added as static. It is
845 * also used to remove an entry from the table. Use the '<em>show ip6
846 * neighbors</em>' command to display all learned and manually entered entries.
849 * Example of how to add a static entry to the IPv6 neighbor adjacency table:
850 * @cliexcmd{set ip6 neighbor GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b static}
851 * Example of how to delete an entry from the IPv6 neighbor adjacency table:
852 * @cliexcmd{set ip6 neighbor del GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b}
855 VLIB_CLI_COMMAND (set_ip6_neighbor_command, static) = {
856 .path = "set ip6 neighbor",
857 .function = set_ip6_neighbor,
858 .short_help = "set ip6 neighbor [del] <interface> <ip6-address> <mac-address> [static]",
863 ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP,
864 ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY,
865 ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
866 } icmp6_neighbor_solicitation_or_advertisement_next_t;
868 static_always_inline uword
869 icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
870 vlib_node_runtime_t * node,
871 vlib_frame_t * frame,
872 uword is_solicitation)
874 vnet_main_t * vnm = vnet_get_main();
875 ip6_main_t * im = &ip6_main;
876 uword n_packets = frame->n_vectors;
877 u32 * from, * to_next;
878 u32 n_left_from, n_left_to_next, next_index, n_advertisements_sent;
879 icmp6_neighbor_discovery_option_type_t option_type;
880 vlib_node_runtime_t * error_node = vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
883 from = vlib_frame_vector_args (frame);
884 n_left_from = n_packets;
885 next_index = node->cached_next_index;
887 if (node->flags & VLIB_NODE_FLAG_TRACE)
888 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
890 sizeof (icmp6_input_trace_t));
894 ? ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address
895 : ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address);
896 n_advertisements_sent = 0;
898 while (n_left_from > 0)
900 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
902 while (n_left_from > 0 && n_left_to_next > 0)
906 icmp6_neighbor_solicitation_or_advertisement_header_t * h0;
907 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t * o0;
908 u32 bi0, options_len0, sw_if_index0, next0, error0;
909 u32 ip6_sadd_link_local, ip6_sadd_unspecified;
913 bi0 = to_next[0] = from[0];
920 p0 = vlib_get_buffer (vm, bi0);
921 ip0 = vlib_buffer_get_current (p0);
922 h0 = ip6_next_header (ip0);
923 options_len0 = clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
925 error0 = ICMP6_ERROR_NONE;
926 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
927 ip6_sadd_link_local = ip6_address_is_link_local_unicast(&ip0->src_address);
928 ip6_sadd_unspecified = ip6_address_is_unspecified (&ip0->src_address);
930 /* Check that source address is unspecified, link-local or else on-link. */
931 if (!ip6_sadd_unspecified && !ip6_sadd_link_local)
933 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
935 if (ADJ_INDEX_INVALID != src_adj_index0)
937 ip_adjacency_t * adj0 = ip_get_adjacency (&im->lookup_main, src_adj_index0);
939 /* Allow all realistic-looking rewrite adjacencies to pass */
940 ni0 = adj0->lookup_next_index;
941 is_rewrite0 = (ni0 >= IP_LOOKUP_NEXT_ARP) &&
942 (ni0 < IP6_LOOKUP_N_NEXT);
944 error0 = ((adj0->rewrite_header.sw_if_index != sw_if_index0
946 ? ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK
951 error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK;
955 o0 = (void *) (h0 + 1);
956 o0 = ((options_len0 == 8 && o0->header.type == option_type
957 && o0->header.n_data_u64s == 1) ? o0 : 0);
959 /* If src address unspecified or link local, donot learn neighbor MAC */
960 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
961 !ip6_sadd_unspecified && !ip6_sadd_link_local))
963 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
964 if (nm->limit_neighbor_cache_size &&
965 pool_elts (nm->neighbor_pool) >= nm->limit_neighbor_cache_size)
966 unset_random_neighbor_entry();
967 vnet_set_ip6_ethernet_neighbor (
969 is_solicitation ? &ip0->src_address : &h0->target_address,
970 o0->ethernet_address, sizeof (o0->ethernet_address), 0);
973 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
975 /* Check that target address is local to this router. */
976 fib_node_index_t fei;
979 fib_index = ip6_fib_table_get_index_for_sw_if_index(sw_if_index0);
983 error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
987 fei = ip6_fib_table_lookup_exact_match(fib_index,
991 if (FIB_NODE_INDEX_INVALID == fei ||
992 !(FIB_ENTRY_FLAG_LOCAL &
993 fib_entry_get_flags_for_source(fei, FIB_SOURCE_INTERFACE)))
995 error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1000 if (is_solicitation)
1001 next0 = (error0 != ICMP6_ERROR_NONE
1002 ? ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP
1003 : ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY);
1007 error0 = error0 == ICMP6_ERROR_NONE ?
1008 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_RX : error0;
1011 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1013 vnet_sw_interface_t * sw_if0;
1014 ethernet_interface_t * eth_if0;
1015 ethernet_header_t *eth0;
1017 /* dst address is either source address or the all-nodes mcast addr */
1018 if(!ip6_sadd_unspecified)
1019 ip0->dst_address = ip0->src_address;
1021 ip6_set_reserved_multicast_address(&ip0->dst_address,
1022 IP6_MULTICAST_SCOPE_link_local,
1023 IP6_MULTICAST_GROUP_ID_all_hosts);
1025 ip0->src_address = h0->target_address;
1026 ip0->hop_limit = 255;
1027 h0->icmp.type = ICMP6_neighbor_advertisement;
1029 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1030 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1031 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1034 clib_memcpy (o0->ethernet_address, eth_if0->address, 6);
1036 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
1039 h0->advertisement_flags = clib_host_to_net_u32
1040 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED
1041 | ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
1043 h0->icmp.checksum = 0;
1045 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1047 ASSERT(bogus_length == 0);
1049 /* Reuse current MAC header, copy SMAC to DMAC and
1050 * interface MAC to SMAC */
1051 vlib_buffer_advance(p0, - ethernet_buffer_header_size(p0));
1052 eth0 = vlib_buffer_get_current(p0);
1053 clib_memcpy(eth0->dst_address, eth0->src_address, 6);
1055 clib_memcpy(eth0->src_address, eth_if0->address, 6);
1057 /* Setup input and output sw_if_index for packet */
1058 ASSERT(vnet_buffer(p0)->sw_if_index[VLIB_RX] == sw_if_index0);
1059 vnet_buffer(p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1060 vnet_buffer(p0)->sw_if_index[VLIB_RX] =
1061 vnet_main.local_interface_sw_if_index;
1063 n_advertisements_sent++;
1066 p0->error = error_node->errors[error0];
1068 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1069 to_next, n_left_to_next,
1073 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1076 /* Account for advertisements sent. */
1077 vlib_error_count (vm, error_node->node_index, ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX, n_advertisements_sent);
1079 return frame->n_vectors;
1082 /* for "syslogging" - use elog for now */
1083 #define foreach_log_level \
1084 _ (DEBUG, "DEBUG") \
1085 _ (INFO, "INFORMATION") \
1086 _ (NOTICE, "NOTICE") \
1087 _ (WARNING, "WARNING") \
1089 _ (CRIT, "CRITICAL") \
1090 _ (ALERT, "ALERT") \
1091 _ (EMERG, "EMERGENCY")
1094 #define _(f,s) LOG_##f,
1099 static char * log_level_strings[] = {
1105 static int logmask = 1 << LOG_DEBUG;
1108 ip6_neighbor_syslog(vlib_main_t *vm, int priority, char * fmt, ...)
1110 /* just use elog for now */
1114 if( (priority > LOG_EMERG) ||
1115 !(logmask & (1 << priority)))
1121 what = va_format (0, fmt, &va);
1123 ELOG_TYPE_DECLARE (e) = {
1124 .format = "ip6 nd: (%s): %s",
1125 .format_args = "T4T4",
1127 struct { u32 s[2]; } * ed;
1128 ed = ELOG_DATA (&vm->elog_main, e);
1129 ed->s[0] = elog_string(&vm->elog_main, log_level_strings[priority]);
1130 ed->s[1] = elog_string(&vm->elog_main, (char *)what);
1136 /* ipv6 neighbor discovery - router advertisements */
1138 ICMP6_ROUTER_SOLICITATION_NEXT_DROP,
1139 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW,
1140 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX,
1141 ICMP6_ROUTER_SOLICITATION_N_NEXT,
1142 } icmp6_router_solicitation_or_advertisement_next_t;
1144 static_always_inline uword
1145 icmp6_router_solicitation(vlib_main_t * vm,
1146 vlib_node_runtime_t * node,
1147 vlib_frame_t * frame)
1149 vnet_main_t * vnm = vnet_get_main();
1150 ip6_main_t * im = &ip6_main;
1151 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
1152 uword n_packets = frame->n_vectors;
1153 u32 * from, * to_next;
1154 u32 n_left_from, n_left_to_next, next_index;
1155 u32 n_advertisements_sent = 0;
1158 icmp6_neighbor_discovery_option_type_t option_type;
1160 vlib_node_runtime_t * error_node = vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1162 from = vlib_frame_vector_args (frame);
1163 n_left_from = n_packets;
1164 next_index = node->cached_next_index;
1166 if (node->flags & VLIB_NODE_FLAG_TRACE)
1167 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1169 sizeof (icmp6_input_trace_t));
1171 /* source may append his LL address */
1172 option_type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1174 while (n_left_from > 0)
1176 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1178 while (n_left_from > 0 && n_left_to_next > 0)
1182 ip6_radv_t *radv_info = 0;
1184 icmp6_neighbor_discovery_header_t * h0;
1185 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t * o0;
1187 u32 bi0, options_len0, sw_if_index0, next0, error0;
1188 u32 is_solicitation = 1, is_dropped = 0;
1189 u32 is_unspecified, is_link_local;
1191 bi0 = to_next[0] = from[0];
1196 n_left_to_next -= 1;
1198 p0 = vlib_get_buffer (vm, bi0);
1199 ip0 = vlib_buffer_get_current (p0);
1200 h0 = ip6_next_header (ip0);
1201 options_len0 = clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1202 is_unspecified = ip6_address_is_unspecified (&ip0->src_address);
1203 is_link_local = ip6_address_is_link_local_unicast (&ip0->src_address);
1205 error0 = ICMP6_ERROR_NONE;
1206 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1208 /* check if solicitation (not from nd_timer node) */
1209 if (ip6_address_is_unspecified (&ip0->dst_address))
1210 is_solicitation = 0;
1212 /* Check that source address is unspecified, link-local or else on-link. */
1213 if (!is_unspecified && !is_link_local)
1215 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1217 if (ADJ_INDEX_INVALID != src_adj_index0)
1219 ip_adjacency_t * adj0 = ip_get_adjacency (&im->lookup_main,
1222 error0 = (adj0->rewrite_header.sw_if_index != sw_if_index0
1223 ? ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK
1228 error0 = ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK;
1232 /* check for source LL option and process */
1233 o0 = (void *) (h0 + 1);
1234 o0 = ((options_len0 == 8
1235 && o0->header.type == option_type
1236 && o0->header.n_data_u64s == 1)
1240 /* if src address unspecified IGNORE any options */
1241 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1242 !is_unspecified && !is_link_local)) {
1243 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
1244 if (nm->limit_neighbor_cache_size &&
1245 pool_elts (nm->neighbor_pool) >= nm->limit_neighbor_cache_size)
1246 unset_random_neighbor_entry();
1248 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1250 o0->ethernet_address,
1251 sizeof (o0->ethernet_address), 0);
1254 /* default is to drop */
1255 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1257 if (error0 == ICMP6_ERROR_NONE)
1259 vnet_sw_interface_t * sw_if0;
1260 ethernet_interface_t * eth_if0;
1263 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1264 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1265 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1267 /* only support ethernet interface type for now */
1268 error0 = (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF : error0;
1270 if (error0 == ICMP6_ERROR_NONE)
1274 /* adjust the sizeof the buffer to just include the ipv6 header */
1275 p0->current_length -= (options_len0 + sizeof(icmp6_neighbor_discovery_header_t));
1277 /* look up the radv_t information for this interface */
1278 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
1280 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1283 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1285 error0 = ((!radv_info) ? ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG : error0);
1287 if (error0 == ICMP6_ERROR_NONE)
1289 f64 now = vlib_time_now (vm);
1291 /* for solicited adverts - need to rate limit */
1294 if( (now - radv_info->last_radv_time) < MIN_DELAY_BETWEEN_RAS )
1297 radv_info->last_radv_time = now;
1301 icmp6_router_advertisement_header_t rh;
1303 rh.icmp.type = ICMP6_router_advertisement;
1305 rh.icmp.checksum = 0;
1307 rh.current_hop_limit = radv_info->curr_hop_limit;
1308 rh.router_lifetime_in_sec = clib_host_to_net_u16(radv_info->adv_router_lifetime_in_sec);
1309 rh.time_in_msec_between_retransmitted_neighbor_solicitations =
1310 clib_host_to_net_u32(radv_info->adv_time_in_msec_between_retransmitted_neighbor_solicitations);
1311 rh.neighbor_reachable_time_in_msec =
1312 clib_host_to_net_u32(radv_info->adv_neighbor_reachable_time_in_msec);
1314 rh.flags = (radv_info->adv_managed_flag) ? ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP : 0;
1315 rh.flags |= ( (radv_info->adv_other_flag) ? ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP : 0);
1318 u16 payload_length = sizeof(icmp6_router_advertisement_header_t);
1320 vlib_buffer_add_data (vm,
1321 p0->free_list_index,
1323 (void *)&rh, sizeof(icmp6_router_advertisement_header_t));
1325 if(radv_info->adv_link_layer_address)
1327 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t h;
1329 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1330 h.header.n_data_u64s = 1;
1332 /* copy ll address */
1333 clib_memcpy(&h.ethernet_address[0], eth_if0->address, 6);
1335 vlib_buffer_add_data (vm,
1336 p0->free_list_index,
1338 (void *)&h, sizeof(icmp6_neighbor_discovery_ethernet_link_layer_address_option_t));
1340 payload_length += sizeof(icmp6_neighbor_discovery_ethernet_link_layer_address_option_t);
1343 /* add MTU option */
1344 if(radv_info->adv_link_mtu)
1346 icmp6_neighbor_discovery_mtu_option_t h;
1349 h.mtu = clib_host_to_net_u32(radv_info->adv_link_mtu);
1350 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu;
1351 h.header.n_data_u64s = 1;
1353 payload_length += sizeof( icmp6_neighbor_discovery_mtu_option_t);
1355 vlib_buffer_add_data (vm,
1356 p0->free_list_index,
1358 (void *)&h, sizeof(icmp6_neighbor_discovery_mtu_option_t));
1361 /* add advertised prefix options */
1362 ip6_radv_prefix_t *pr_info;
1364 pool_foreach (pr_info, radv_info->adv_prefixes_pool, ({
1366 if(pr_info->enabled &&
1367 (!pr_info->decrement_lifetime_flag || (pr_info->pref_lifetime_expires >0)))
1369 /* advertise this prefix */
1370 icmp6_neighbor_discovery_prefix_information_option_t h;
1372 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information;
1373 h.header.n_data_u64s = (sizeof(icmp6_neighbor_discovery_prefix_information_option_t) >> 3);
1375 h.dst_address_length = pr_info->prefix_len;
1377 h.flags = (pr_info->adv_on_link_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_FLAG_ON_LINK : 0;
1378 h.flags |= (pr_info->adv_autonomous_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_AUTO : 0;
1380 if(radv_info->cease_radv && pr_info->deprecated_prefix_flag)
1382 h.valid_time = clib_host_to_net_u32(MIN_ADV_VALID_LIFETIME);
1383 h.preferred_time = 0;
1387 if(pr_info->decrement_lifetime_flag)
1389 pr_info->adv_valid_lifetime_in_secs = ((pr_info->valid_lifetime_expires > now)) ?
1390 (pr_info->valid_lifetime_expires - now) : 0;
1392 pr_info->adv_pref_lifetime_in_secs = ((pr_info->pref_lifetime_expires > now)) ?
1393 (pr_info->pref_lifetime_expires - now) : 0;
1396 h.valid_time = clib_host_to_net_u32(pr_info->adv_valid_lifetime_in_secs);
1397 h.preferred_time = clib_host_to_net_u32(pr_info->adv_pref_lifetime_in_secs) ;
1401 clib_memcpy(&h.dst_address, &pr_info->prefix, sizeof(ip6_address_t));
1403 payload_length += sizeof( icmp6_neighbor_discovery_prefix_information_option_t);
1405 vlib_buffer_add_data (vm,
1406 p0->free_list_index,
1408 (void *)&h, sizeof(icmp6_neighbor_discovery_prefix_information_option_t));
1413 /* add additional options before here */
1415 /* finish building the router advertisement... */
1416 if(!is_unspecified && radv_info->send_unicast)
1418 ip0->dst_address = ip0->src_address;
1422 /* target address is all-nodes mcast addr */
1423 ip6_set_reserved_multicast_address(&ip0->dst_address,
1424 IP6_MULTICAST_SCOPE_link_local,
1425 IP6_MULTICAST_GROUP_ID_all_hosts);
1428 /* source address MUST be the link-local address */
1429 ip0->src_address = radv_info->link_local_address;
1431 ip0->hop_limit = 255;
1432 ip0->payload_length = clib_host_to_net_u16 (payload_length);
1434 icmp6_router_advertisement_header_t * rh0 = (icmp6_router_advertisement_header_t *)(ip0 + 1);
1435 rh0->icmp.checksum =
1436 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1438 ASSERT(bogus_length == 0);
1440 /* setup output if and adjacency */
1441 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1442 vnet_main.local_interface_sw_if_index;
1444 if (is_solicitation)
1446 ethernet_header_t *eth0;
1447 /* Reuse current MAC header, copy SMAC to DMAC and
1448 * interface MAC to SMAC */
1449 vlib_buffer_reset (p0);
1450 eth0 = vlib_buffer_get_current(p0);
1451 clib_memcpy(eth0->dst_address, eth0->src_address, 6);
1452 clib_memcpy(eth0->src_address, eth_if0->address, 6);
1453 next0 = is_dropped ?
1454 next0 : ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX;
1455 vnet_buffer(p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1459 adj_index0 = radv_info->all_nodes_adj_index;
1460 if (adj_index0 == 0)
1461 error0 = ICMP6_ERROR_DST_LOOKUP_MISS;
1464 ip_adjacency_t * adj0 = ip_get_adjacency (&im->lookup_main, adj_index0);
1466 ((adj0->rewrite_header.sw_if_index != sw_if_index0
1467 || adj0->lookup_next_index != IP_LOOKUP_NEXT_REWRITE)
1468 ? ICMP6_ERROR_ROUTER_SOLICITATION_DEST_UNKNOWN
1470 next0 = is_dropped ?
1471 next0 : ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW;
1472 vnet_buffer (p0)->ip.adj_index[VLIB_TX] = adj_index0;
1475 p0->flags |= VNET_BUFFER_LOCALLY_ORIGINATED;
1477 radv_info->n_solicitations_dropped += is_dropped;
1478 radv_info->n_solicitations_rcvd += is_solicitation;
1480 if((error0 == ICMP6_ERROR_NONE) && !is_dropped)
1482 radv_info->n_advertisements_sent++;
1483 n_advertisements_sent++;
1489 p0->error = error_node->errors[error0];
1491 if(error0 != ICMP6_ERROR_NONE)
1492 vlib_error_count (vm, error_node->node_index, error0, 1);
1494 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1495 to_next, n_left_to_next,
1500 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1503 /* Account for router advertisements sent. */
1504 vlib_error_count (vm, error_node->node_index, ICMP6_ERROR_ROUTER_ADVERTISEMENTS_TX, n_advertisements_sent);
1506 return frame->n_vectors;
1509 /* validate advertised info for consistancy (see RFC-4861 section 6.2.7) - log any inconsistencies, packet will always be dropped */
1510 static_always_inline uword
1511 icmp6_router_advertisement(vlib_main_t * vm,
1512 vlib_node_runtime_t * node,
1513 vlib_frame_t * frame)
1515 vnet_main_t * vnm = vnet_get_main();
1516 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
1517 uword n_packets = frame->n_vectors;
1518 u32 * from, * to_next;
1519 u32 n_left_from, n_left_to_next, next_index;
1520 u32 n_advertisements_rcvd = 0;
1522 vlib_node_runtime_t * error_node = vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1524 from = vlib_frame_vector_args (frame);
1525 n_left_from = n_packets;
1526 next_index = node->cached_next_index;
1528 if (node->flags & VLIB_NODE_FLAG_TRACE)
1529 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1531 sizeof (icmp6_input_trace_t));
1533 while (n_left_from > 0)
1535 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1537 while (n_left_from > 0 && n_left_to_next > 0)
1541 ip6_radv_t *radv_info = 0;
1542 icmp6_router_advertisement_header_t * h0;
1543 u32 bi0, options_len0, sw_if_index0, next0, error0;
1545 bi0 = to_next[0] = from[0];
1550 n_left_to_next -= 1;
1552 p0 = vlib_get_buffer (vm, bi0);
1553 ip0 = vlib_buffer_get_current (p0);
1554 h0 = ip6_next_header (ip0);
1555 options_len0 = clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1557 error0 = ICMP6_ERROR_NONE;
1558 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1560 /* Check that source address is link-local*/
1561 error0 = (!ip6_address_is_link_local_unicast (&ip0->src_address)) ?
1562 ICMP6_ERROR_ROUTER_ADVERTISEMENT_SOURCE_NOT_LINK_LOCAL : error0;
1564 /* default is to drop */
1565 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1567 n_advertisements_rcvd++;
1569 if (error0 == ICMP6_ERROR_NONE)
1571 vnet_sw_interface_t * sw_if0;
1572 ethernet_interface_t * eth_if0;
1574 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1575 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1576 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1578 /* only support ethernet interface type for now */
1579 error0 = (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF : error0;
1581 if (error0 == ICMP6_ERROR_NONE)
1585 /* look up the radv_t information for this interface */
1586 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
1588 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1591 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1593 error0 = ((!radv_info) ? ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG : error0);
1595 if (error0 == ICMP6_ERROR_NONE)
1597 /* validate advertised information */
1598 if((h0->current_hop_limit && radv_info->curr_hop_limit) &&
1599 (h0->current_hop_limit != radv_info->curr_hop_limit))
1601 ip6_neighbor_syslog(vm, LOG_WARNING,
1602 "our AdvCurHopLimit on %U doesn't agree with %U",
1603 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1606 if((h0->flags & ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP) !=
1607 radv_info->adv_managed_flag)
1609 ip6_neighbor_syslog(vm, LOG_WARNING,
1610 "our AdvManagedFlag on %U doesn't agree with %U",
1611 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1614 if((h0->flags & ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP) !=
1615 radv_info->adv_other_flag)
1617 ip6_neighbor_syslog(vm, LOG_WARNING,
1618 "our AdvOtherConfigFlag on %U doesn't agree with %U",
1619 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1622 if((h0->time_in_msec_between_retransmitted_neighbor_solicitations &&
1623 radv_info->adv_time_in_msec_between_retransmitted_neighbor_solicitations) &&
1624 (h0->time_in_msec_between_retransmitted_neighbor_solicitations !=
1625 clib_host_to_net_u32(radv_info->adv_time_in_msec_between_retransmitted_neighbor_solicitations)))
1627 ip6_neighbor_syslog(vm, LOG_WARNING,
1628 "our AdvRetransTimer on %U doesn't agree with %U",
1629 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1632 if((h0->neighbor_reachable_time_in_msec &&
1633 radv_info->adv_neighbor_reachable_time_in_msec) &&
1634 (h0->neighbor_reachable_time_in_msec !=
1635 clib_host_to_net_u32(radv_info->adv_neighbor_reachable_time_in_msec)))
1637 ip6_neighbor_syslog(vm, LOG_WARNING,
1638 "our AdvReachableTime on %U doesn't agree with %U",
1639 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1642 /* check for MTU or prefix options or .. */
1643 u8 * opt_hdr = (u8 *)(h0 + 1);
1644 while( options_len0 > 0)
1646 icmp6_neighbor_discovery_option_header_t *o0 = ( icmp6_neighbor_discovery_option_header_t *)opt_hdr;
1647 int opt_len = o0->n_data_u64s << 3;
1648 icmp6_neighbor_discovery_option_type_t option_type = o0->type;
1650 if(options_len0 < 2)
1652 ip6_neighbor_syslog(vm, LOG_ERR,
1653 "malformed RA packet on %U from %U",
1654 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1660 ip6_neighbor_syslog(vm, LOG_ERR,
1661 " zero length option in RA on %U from %U",
1662 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1665 else if( opt_len > options_len0)
1667 ip6_neighbor_syslog(vm, LOG_ERR,
1668 "option length in RA packet greater than total length on %U from %U",
1669 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1673 options_len0 -= opt_len;
1678 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu:
1680 icmp6_neighbor_discovery_mtu_option_t *h =
1681 (icmp6_neighbor_discovery_mtu_option_t *)(o0);
1683 if(opt_len < sizeof(*h))
1686 if((h->mtu && radv_info->adv_link_mtu) &&
1687 (h->mtu != clib_host_to_net_u32(radv_info->adv_link_mtu)))
1689 ip6_neighbor_syslog(vm, LOG_WARNING,
1690 "our AdvLinkMTU on %U doesn't agree with %U",
1691 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1696 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information:
1698 icmp6_neighbor_discovery_prefix_information_option_t *h =
1699 (icmp6_neighbor_discovery_prefix_information_option_t *)(o0);
1701 /* validate advertised prefix options */
1702 ip6_radv_prefix_t *pr_info;
1703 u32 preferred, valid;
1705 if(opt_len < sizeof(*h))
1708 preferred = clib_net_to_host_u32(h->preferred_time);
1709 valid = clib_net_to_host_u32(h->valid_time);
1711 /* look for matching prefix - if we our advertising it, it better be consistant */
1712 pool_foreach (pr_info, radv_info->adv_prefixes_pool, ({
1715 ip6_address_mask_from_width(&mask, pr_info->prefix_len);
1717 if(pr_info->enabled &&
1718 (pr_info->prefix_len == h->dst_address_length) &&
1719 ip6_address_is_equal_masked (&pr_info->prefix, &h->dst_address, &mask))
1722 if(!pr_info->decrement_lifetime_flag &&
1723 valid != pr_info->adv_valid_lifetime_in_secs)
1725 ip6_neighbor_syslog(vm, LOG_WARNING,
1726 "our ADV validlifetime on %U for %U does not agree with %U",
1727 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
1728 format_ip6_address, &h->dst_address);
1730 if(!pr_info->decrement_lifetime_flag &&
1731 preferred != pr_info->adv_pref_lifetime_in_secs)
1733 ip6_neighbor_syslog(vm, LOG_WARNING,
1734 "our ADV preferredlifetime on %U for %U does not agree with %U",
1735 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
1736 format_ip6_address, &h->dst_address);
1752 p0->error = error_node->errors[error0];
1754 if(error0 != ICMP6_ERROR_NONE)
1755 vlib_error_count (vm, error_node->node_index, error0, 1);
1757 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1758 to_next, n_left_to_next,
1762 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1765 /* Account for router advertisements sent. */
1766 vlib_error_count (vm, error_node->node_index, ICMP6_ERROR_ROUTER_ADVERTISEMENTS_RX, n_advertisements_rcvd);
1768 return frame->n_vectors;
1771 /* create and initialize router advertisement parameters with default values for this intfc */
1773 ip6_neighbor_sw_interface_add_del (vnet_main_t * vnm,
1777 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
1780 vnet_sw_interface_t * sw_if0;
1781 ethernet_interface_t * eth_if0 = 0;
1783 /* lookup radv container - ethernet interfaces only */
1784 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
1785 if(sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
1786 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1791 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
1792 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
1796 a = pool_elt_at_index (nm->if_radv_pool, ri);
1800 u32 i, * to_delete = 0;
1801 ip6_radv_prefix_t *p;
1802 ip6_mldp_group_t *m;
1804 /* remove adjacencies */
1805 adj_unlock(a->all_nodes_adj_index);
1806 adj_unlock(a->all_routers_adj_index);
1807 adj_unlock(a->all_mldv2_routers_adj_index);
1809 /* clean up prefix_pool */
1810 pool_foreach (p, a->adv_prefixes_pool, ({
1811 vec_add1 (to_delete, p - a->adv_prefixes_pool);
1814 for (i = 0; i < vec_len (to_delete); i++)
1816 p = pool_elt_at_index (a->adv_prefixes_pool, to_delete[i]);
1817 mhash_unset (&a->address_to_prefix_index, &p->prefix, 0);
1818 pool_put (a->adv_prefixes_pool, p);
1821 vec_free (to_delete);
1824 /* clean up mldp group pool */
1825 pool_foreach (m, a->mldp_group_pool, ({
1826 vec_add1 (to_delete, m - a->mldp_group_pool);
1829 for (i = 0; i < vec_len (to_delete); i++)
1831 m = pool_elt_at_index (a->mldp_group_pool, to_delete[i]);
1832 mhash_unset (&a->address_to_mldp_index, &m->mcast_address, 0);
1833 pool_put (a->mldp_group_pool, m);
1836 vec_free (to_delete);
1838 pool_put (nm->if_radv_pool, a);
1839 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ~0;
1847 vnet_hw_interface_t * hw_if0;
1849 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index);
1851 pool_get (nm->if_radv_pool, a);
1853 ri = a - nm->if_radv_pool;
1854 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ri;
1856 /* initialize default values (most of which are zero) */
1857 memset (a, 0, sizeof (a[0]));
1859 a->sw_if_index = sw_if_index;
1861 a->max_radv_interval = DEF_MAX_RADV_INTERVAL;
1862 a->min_radv_interval = DEF_MIN_RADV_INTERVAL;
1863 a->curr_hop_limit = DEF_CURR_HOP_LIMIT;
1864 a->adv_router_lifetime_in_sec = DEF_DEF_RTR_LIFETIME;
1866 a->adv_link_layer_address = 1; /* send ll address source address option */
1868 a->min_delay_between_radv = MIN_DELAY_BETWEEN_RAS;
1869 a->max_delay_between_radv = MAX_DELAY_BETWEEN_RAS;
1870 a->max_rtr_default_lifetime = MAX_DEF_RTR_LIFETIME;
1871 a->seed = (u32) clib_cpu_time_now();
1872 (void) random_u32 (&a->seed);
1873 a->randomizer = clib_cpu_time_now();
1874 (void) random_u64 (&a->randomizer);
1876 a->initial_adverts_count = MAX_INITIAL_RTR_ADVERTISEMENTS ;
1877 a->initial_adverts_sent = a->initial_adverts_count-1;
1878 a->initial_adverts_interval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
1880 /* deafult is to send */
1883 /* fill in radv_info for this interface that will be needed later */
1884 a->adv_link_mtu = hw_if0->max_l3_packet_bytes[VLIB_RX];
1886 clib_memcpy (a->link_layer_address, eth_if0->address, 6);
1888 /* fill in default link-local address (this may be overridden) */
1889 ip6_link_local_address_from_ethernet_address (&a->link_local_address, eth_if0->address);
1890 a->link_local_prefix_len = 64;
1892 mhash_init (&a->address_to_prefix_index, sizeof (uword), sizeof (ip6_address_t));
1893 mhash_init (&a->address_to_mldp_index, sizeof (uword), sizeof (ip6_address_t));
1896 u8 link_layer_address[6] =
1897 {0x33, 0x33, 0x00, 0x00, 0x00, IP6_MULTICAST_GROUP_ID_all_hosts};
1899 a->all_nodes_adj_index = adj_rewrite_add_and_lock(FIB_PROTOCOL_IP6,
1902 link_layer_address);
1906 u8 link_layer_address[6] =
1907 {0x33, 0x33, 0x00, 0x00, 0x00, IP6_MULTICAST_GROUP_ID_all_routers};
1909 a->all_routers_adj_index = adj_rewrite_add_and_lock(FIB_PROTOCOL_IP6,
1912 link_layer_address);
1916 u8 link_layer_address[6] =
1917 {0x33, 0x33, 0x00, 0x00, 0x00, IP6_MULTICAST_GROUP_ID_mldv2_routers};
1919 a->all_mldv2_routers_adj_index =
1920 adj_rewrite_add_and_lock(FIB_PROTOCOL_IP6,
1923 link_layer_address);
1926 /* add multicast groups we will always be reporting */
1928 ip6_mldp_group_t *mcast_group_info;
1930 ip6_set_reserved_multicast_address (&addr,
1931 IP6_MULTICAST_SCOPE_link_local,
1932 IP6_MULTICAST_GROUP_ID_all_hosts);
1934 /* lookup mldp info for this interface */
1936 uword * p = mhash_get (&a->address_to_mldp_index, &addr);
1937 mcast_group_info = p ? pool_elt_at_index (a->mldp_group_pool, p[0]) : 0;
1940 if(!mcast_group_info)
1944 pool_get (a->mldp_group_pool, mcast_group_info);
1946 mi = mcast_group_info - a->mldp_group_pool;
1947 mhash_set (&a->address_to_mldp_index, &addr, mi, /* old_value */ 0);
1949 mcast_group_info->type = 4;
1950 mcast_group_info->mcast_source_address_pool = 0;
1951 mcast_group_info->num_sources = 0;
1952 clib_memcpy(&mcast_group_info->mcast_address, &addr, sizeof(ip6_address_t));
1955 ip6_set_reserved_multicast_address (&addr,
1956 IP6_MULTICAST_SCOPE_link_local,
1957 IP6_MULTICAST_GROUP_ID_all_routers);
1959 p = mhash_get (&a->address_to_mldp_index, &addr);
1960 mcast_group_info = p ? pool_elt_at_index (a->mldp_group_pool, p[0]) : 0;
1962 if(!mcast_group_info)
1966 pool_get (a->mldp_group_pool, mcast_group_info);
1968 mi = mcast_group_info - a->mldp_group_pool;
1969 mhash_set (&a->address_to_mldp_index, &addr, mi, /* old_value */ 0);
1971 mcast_group_info->type = 4;
1972 mcast_group_info->mcast_source_address_pool = 0;
1973 mcast_group_info->num_sources = 0;
1974 clib_memcpy(&mcast_group_info->mcast_address, &addr, sizeof(ip6_address_t));
1977 ip6_set_reserved_multicast_address (&addr,
1978 IP6_MULTICAST_SCOPE_link_local,
1979 IP6_MULTICAST_GROUP_ID_mldv2_routers);
1981 p = mhash_get (&a->address_to_mldp_index, &addr);
1982 mcast_group_info = p ? pool_elt_at_index (a->mldp_group_pool, p[0]) : 0;
1984 if(!mcast_group_info)
1988 pool_get (a->mldp_group_pool, mcast_group_info);
1990 mi = mcast_group_info - a->mldp_group_pool;
1991 mhash_set (&a->address_to_mldp_index, &addr, mi, /* old_value */ 0);
1993 mcast_group_info->type = 4;
1994 mcast_group_info->mcast_source_address_pool = 0;
1995 mcast_group_info->num_sources = 0;
1996 clib_memcpy(&mcast_group_info->mcast_address, &addr, sizeof(ip6_address_t));
2003 /* send an mldpv2 report */
2005 ip6_neighbor_send_mldpv2_report(u32 sw_if_index)
2007 vnet_main_t * vnm = vnet_get_main();
2008 vlib_main_t * vm = vnm->vlib_main;
2009 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
2010 vnet_sw_interface_t * sw_if0;
2011 ethernet_interface_t * eth_if0;
2015 ip6_radv_t *radv_info;
2025 icmp6_multicast_listener_report_header_t *rh0;
2026 icmp6_multicast_listener_report_packet_t *rp0;
2028 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2029 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
2030 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2032 if (!eth_if0 || !vnet_sw_interface_is_admin_up (vnm, sw_if_index))
2035 /* look up the radv_t information for this interface */
2036 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
2038 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2043 /* send report now - build a mldpv2 report packet */
2044 n_allocated = vlib_buffer_alloc_from_free_list(vm,
2047 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2048 if (PREDICT_FALSE(n_allocated == 0))
2050 clib_warning ("buffer allocation failure");
2054 b0 = vlib_get_buffer (vm, bo0);
2056 /* adjust the sizeof the buffer to just include the ipv6 header */
2057 b0->current_length = sizeof(icmp6_multicast_listener_report_packet_t);
2059 payload_length = sizeof(icmp6_multicast_listener_report_header_t);
2061 b0->error = ICMP6_ERROR_NONE;
2063 rp0 = vlib_buffer_get_current (b0);
2064 ip0 = (ip6_header_t *)&rp0-> ip;
2065 rh0 = (icmp6_multicast_listener_report_header_t *)&rp0-> report_hdr;
2067 memset (rp0 , 0x0, sizeof (icmp6_multicast_listener_report_packet_t));
2069 ip0->ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2071 ip0->protocol = IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS;
2072 /* for DEBUG - vnet driver won't seem to emit router alerts */
2073 /* ip0->protocol = IP_PROTOCOL_ICMP6; */
2076 rh0->icmp.type = ICMP6_multicast_listener_report_v2;
2078 /* source address MUST be the link-local address */
2079 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2080 ip0->src_address = radv_info->link_local_address;
2082 /* destination is all mldpv2 routers */
2083 ip6_set_reserved_multicast_address(&ip0->dst_address,
2084 IP6_MULTICAST_SCOPE_link_local,
2085 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2087 /* add reports here */
2088 ip6_mldp_group_t *m;
2089 int num_addr_records = 0;
2090 icmp6_multicast_address_record_t rr;
2092 /* fill in the hop-by-hop extension header (router alert) info */
2093 rh0->ext_hdr.next_hdr = IP_PROTOCOL_ICMP6;
2094 rh0->ext_hdr.n_data_u64s = 0;
2096 rh0->alert.type = IP6_MLDP_ALERT_TYPE;
2098 rh0->alert.value = 0;
2103 rh0->icmp.checksum = 0;
2105 pool_foreach (m, radv_info->mldp_group_pool, ({
2108 rr.aux_data_len_u32s = 0;
2109 rr.num_sources = clib_host_to_net_u16 (m->num_sources);
2110 clib_memcpy(&rr.mcast_addr, &m->mcast_address, sizeof(ip6_address_t));
2114 vlib_buffer_add_data (vm,
2115 b0->free_list_index,
2117 (void *)&rr, sizeof(icmp6_multicast_address_record_t));
2119 payload_length += sizeof( icmp6_multicast_address_record_t);
2123 rh0->num_addr_records = clib_host_to_net_u16(num_addr_records);
2125 /* update lengths */
2126 ip0->payload_length = clib_host_to_net_u16 (payload_length);
2128 rh0->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0,
2130 ASSERT(bogus_length == 0);
2133 * OK to override w/ no regard for actual FIB, because
2134 * ip6-rewrite only looks at the adjacency.
2136 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
2137 vnet_main.local_interface_sw_if_index;
2139 vnet_buffer (b0)->ip.adj_index[VLIB_TX] =
2140 radv_info->all_mldv2_routers_adj_index;
2141 b0->flags |= VNET_BUFFER_LOCALLY_ORIGINATED;
2143 vlib_node_t * node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite");
2145 f = vlib_get_frame_to_node (vm, node->index);
2146 to_next = vlib_frame_vector_args (f);
2150 vlib_put_frame_to_node (vm, node->index, f);
2154 VLIB_REGISTER_NODE (ip6_icmp_router_solicitation_node,static) = {
2155 .function = icmp6_router_solicitation,
2156 .name = "icmp6-router-solicitation",
2158 .vector_size = sizeof (u32),
2160 .format_trace = format_icmp6_input_trace,
2162 .n_next_nodes = ICMP6_ROUTER_SOLICITATION_N_NEXT,
2164 [ICMP6_ROUTER_SOLICITATION_NEXT_DROP] = "error-drop",
2165 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW] = "ip6-rewrite",
2166 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX] = "interface-output",
2170 /* send a RA or update the timer info etc.. */
2172 ip6_neighbor_process_timer_event (vlib_main_t * vm,
2173 vlib_node_runtime_t * node,
2174 vlib_frame_t * frame)
2176 vnet_main_t * vnm = vnet_get_main();
2177 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
2178 ip6_radv_t *radv_info;
2179 vlib_frame_t * f = 0;
2180 u32 n_this_frame = 0;
2181 u32 n_left_to_next = 0;
2184 icmp6_router_solicitation_header_t * h0;
2186 f64 now = vlib_time_now (vm);
2188 /* Interface ip6 radv info list */
2189 pool_foreach (radv_info, nm->if_radv_pool, ({
2191 if( !vnet_sw_interface_is_admin_up (vnm, radv_info->sw_if_index))
2193 radv_info->initial_adverts_sent = radv_info->initial_adverts_count-1;
2194 radv_info->next_multicast_time = now;
2195 radv_info->last_multicast_time = now;
2196 radv_info->last_radv_time = 0;
2197 radv_info->all_routers_mcast = 0;
2201 /* Make sure that we've joined the all-routers multicast group */
2202 if(!radv_info->all_routers_mcast)
2204 /* send MDLP_REPORT_EVENT message */
2205 ip6_neighbor_send_mldpv2_report(radv_info->sw_if_index);
2206 radv_info->all_routers_mcast = 1;
2209 /* is it time to send a multicast RA on this interface? */
2210 if(radv_info->send_radv && (now >= radv_info->next_multicast_time))
2215 f64 rfn = (radv_info->max_radv_interval - radv_info->min_radv_interval) *
2216 random_f64 (&radv_info->seed) + radv_info->min_radv_interval;
2218 /* multicast send - compute next multicast send time */
2219 if( radv_info->initial_adverts_sent > 0)
2221 radv_info->initial_adverts_sent--;
2222 if(rfn > radv_info-> initial_adverts_interval)
2223 rfn = radv_info-> initial_adverts_interval;
2225 /* check to see if we are ceasing to send */
2226 if( radv_info->initial_adverts_sent == 0)
2227 if(radv_info->cease_radv)
2228 radv_info->send_radv = 0;
2231 radv_info->next_multicast_time = rfn + now;
2232 radv_info->last_multicast_time = now;
2234 /* send advert now - build a "solicted" router advert with unspecified source address */
2235 n_allocated = vlib_buffer_alloc_from_free_list(vm,
2238 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2240 if (PREDICT_FALSE(n_allocated == 0))
2242 clib_warning ("buffer allocation failure");
2245 b0 = vlib_get_buffer (vm, bo0);
2246 b0->current_length = sizeof( icmp6_router_solicitation_header_t);
2247 b0->error = ICMP6_ERROR_NONE;
2248 vnet_buffer (b0)->sw_if_index[VLIB_RX] = radv_info->sw_if_index;
2250 h0 = vlib_buffer_get_current (b0);
2252 memset (h0, 0, sizeof (icmp6_router_solicitation_header_t));
2254 h0->ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2255 h0->ip.payload_length = clib_host_to_net_u16 (sizeof (icmp6_router_solicitation_header_t)
2256 - STRUCT_OFFSET_OF (icmp6_router_solicitation_header_t, neighbor));
2257 h0->ip.protocol = IP_PROTOCOL_ICMP6;
2258 h0->ip.hop_limit = 255;
2260 /* set src/dst address as "unspecified" this marks this packet as internally generated rather than recieved */
2261 h0->ip.src_address.as_u64[0] = 0;
2262 h0->ip.src_address.as_u64[1] = 0;
2264 h0->ip.dst_address.as_u64[0] = 0;
2265 h0->ip.dst_address.as_u64[1] = 0;
2267 h0->neighbor.icmp.type = ICMP6_router_solicitation;
2269 if (PREDICT_FALSE(f == 0))
2271 f = vlib_get_frame_to_node (vm, ip6_icmp_router_solicitation_node.index);
2272 to_next = vlib_frame_vector_args (f);
2273 n_left_to_next = VLIB_FRAME_SIZE;
2282 if (PREDICT_FALSE(n_left_to_next == 0))
2284 f->n_vectors = n_this_frame;
2285 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2293 ASSERT(n_this_frame);
2294 f->n_vectors = n_this_frame;
2295 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2301 ip6_icmp_neighbor_discovery_event_process (vlib_main_t * vm,
2302 vlib_node_runtime_t * node,
2303 vlib_frame_t * frame)
2306 ip6_icmp_neighbor_discovery_event_data_t * event_data;
2308 /* init code here */
2312 vlib_process_wait_for_event_or_clock (vm, 1. /* seconds */);
2314 event_data = vlib_process_get_event_data (vm, &event_type);
2318 /* No events found: timer expired. */
2319 /* process interface list and send RAs as appropriate, update timer info */
2320 ip6_neighbor_process_timer_event (vm, node, frame);
2324 switch (event_type) {
2326 case ICMP6_ND_EVENT_INIT:
2337 _vec_len (event_data) = 0;
2340 return frame->n_vectors;
2343 VLIB_REGISTER_NODE (ip6_icmp_router_advertisement_node,static) = {
2344 .function = icmp6_router_advertisement,
2345 .name = "icmp6-router-advertisement",
2347 .vector_size = sizeof (u32),
2349 .format_trace = format_icmp6_input_trace,
2357 vlib_node_registration_t ip6_icmp_neighbor_discovery_event_node = {
2359 .function = ip6_icmp_neighbor_discovery_event_process,
2360 .name = "ip6-icmp-neighbor-discovery-event-process",
2361 .type = VLIB_NODE_TYPE_PROCESS,
2365 icmp6_neighbor_solicitation (vlib_main_t * vm,
2366 vlib_node_runtime_t * node,
2367 vlib_frame_t * frame)
2368 { return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame, /* is_solicitation */ 1); }
2371 icmp6_neighbor_advertisement (vlib_main_t * vm,
2372 vlib_node_runtime_t * node,
2373 vlib_frame_t * frame)
2374 { return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame, /* is_solicitation */ 0); }
2376 VLIB_REGISTER_NODE (ip6_icmp_neighbor_solicitation_node,static) = {
2377 .function = icmp6_neighbor_solicitation,
2378 .name = "icmp6-neighbor-solicitation",
2380 .vector_size = sizeof (u32),
2382 .format_trace = format_icmp6_input_trace,
2384 .n_next_nodes = ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
2386 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP] = "error-drop",
2387 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY] = "interface-output",
2391 VLIB_REGISTER_NODE (ip6_icmp_neighbor_advertisement_node,static) = {
2392 .function = icmp6_neighbor_advertisement,
2393 .name = "icmp6-neighbor-advertisement",
2395 .vector_size = sizeof (u32),
2397 .format_trace = format_icmp6_input_trace,
2405 /* API support functions */
2407 ip6_neighbor_ra_config(vlib_main_t * vm, u32 sw_if_index,
2408 u8 suppress, u8 managed, u8 other,
2409 u8 ll_option, u8 send_unicast, u8 cease,
2410 u8 use_lifetime, u32 lifetime,
2411 u32 initial_count, u32 initial_interval,
2412 u32 max_interval, u32 min_interval,
2415 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
2419 /* look up the radv_t information for this interface */
2420 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
2421 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2422 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
2427 ip6_radv_t * radv_info;
2428 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2430 if((max_interval != 0) && (min_interval ==0))
2431 min_interval = .75 * max_interval;
2433 max_interval = (max_interval != 0) ? ( (is_no) ? DEF_MAX_RADV_INTERVAL : max_interval) : radv_info->max_radv_interval;
2434 min_interval = (min_interval != 0) ? ( (is_no) ? DEF_MIN_RADV_INTERVAL : min_interval) : radv_info->min_radv_interval;
2435 lifetime = (use_lifetime != 0) ? ( (is_no) ? DEF_DEF_RTR_LIFETIME : lifetime) : radv_info->adv_router_lifetime_in_sec;
2439 if(lifetime > MAX_DEF_RTR_LIFETIME)
2440 lifetime = MAX_DEF_RTR_LIFETIME;
2442 if(lifetime <= max_interval)
2443 return VNET_API_ERROR_INVALID_VALUE;
2446 if(min_interval != 0)
2448 if((min_interval > .75 * max_interval) ||
2450 return VNET_API_ERROR_INVALID_VALUE;
2453 if((initial_count > MAX_INITIAL_RTR_ADVERTISEMENTS) ||
2454 (initial_interval > MAX_INITIAL_RTR_ADVERT_INTERVAL))
2455 return VNET_API_ERROR_INVALID_VALUE;
2458 if "flag" is set and is_no is true then restore default value else set value corresponding to "flag"
2459 if "flag" is clear don't change corresponding value
2461 radv_info->send_radv = (suppress != 0) ? ( (is_no != 0) ? 1 : 0 ) : radv_info->send_radv;
2462 radv_info->adv_managed_flag = ( managed != 0) ? ( (is_no) ? 0 : 1) : radv_info->adv_managed_flag;
2463 radv_info->adv_other_flag = (other != 0) ? ( (is_no) ? 0: 1) : radv_info->adv_other_flag;
2464 radv_info->adv_link_layer_address = ( ll_option != 0) ? ( (is_no) ? 1 : 0) : radv_info->adv_link_layer_address;
2465 radv_info->send_unicast = (send_unicast != 0) ? ( (is_no) ? 0 : 1) : radv_info->send_unicast;
2466 radv_info->cease_radv = ( cease != 0) ? ( (is_no) ? 0 : 1) : radv_info->cease_radv;
2468 radv_info->min_radv_interval = min_interval;
2469 radv_info->max_radv_interval = max_interval;
2470 radv_info->adv_router_lifetime_in_sec = lifetime;
2472 radv_info->initial_adverts_count =
2473 (initial_count != 0) ? ( (is_no) ? MAX_INITIAL_RTR_ADVERTISEMENTS : initial_count) : radv_info->initial_adverts_count ;
2474 radv_info->initial_adverts_interval =
2475 (initial_interval != 0) ? ( (is_no) ? MAX_INITIAL_RTR_ADVERT_INTERVAL : initial_interval) : radv_info->initial_adverts_interval;
2478 if((cease != 0) && (is_no))
2479 radv_info-> send_radv = 1;
2481 radv_info->initial_adverts_sent = radv_info->initial_adverts_count -1;
2482 radv_info->next_multicast_time = vlib_time_now (vm);
2483 radv_info->last_multicast_time = vlib_time_now (vm);
2484 radv_info->last_radv_time = 0;
2490 ip6_neighbor_ra_prefix(vlib_main_t * vm, u32 sw_if_index,
2491 ip6_address_t *prefix_addr, u8 prefix_len,
2492 u8 use_default, u32 val_lifetime, u32 pref_lifetime,
2493 u8 no_advertise, u8 off_link, u8 no_autoconfig, u8 no_onlink,
2496 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
2501 /* look up the radv_t information for this interface */
2502 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
2504 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2506 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
2510 f64 now = vlib_time_now (vm);
2511 ip6_radv_t * radv_info;
2512 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2514 /* prefix info add, delete or update */
2515 ip6_radv_prefix_t * prefix;
2517 /* lookup prefix info for this address on this interface */
2518 uword * p = mhash_get (&radv_info->address_to_prefix_index, prefix_addr);
2520 prefix = p ? pool_elt_at_index (radv_info->adv_prefixes_pool, p[0]) : 0;
2526 return VNET_API_ERROR_INVALID_VALUE; /* invalid prefix */
2528 if(prefix->prefix_len != prefix_len)
2529 return VNET_API_ERROR_INVALID_VALUE_2;
2531 /* FIXME - Should the DP do this or the CP ?*/
2532 /* do specific delete processing here before returning */
2533 /* try to remove from routing table */
2535 mhash_unset (&radv_info->address_to_prefix_index, prefix_addr,/* old_value */ 0);
2536 pool_put (radv_info->adv_prefixes_pool, prefix);
2538 radv_info->initial_adverts_sent = radv_info->initial_adverts_count -1;
2539 radv_info->next_multicast_time = vlib_time_now (vm);
2540 radv_info->last_multicast_time = vlib_time_now (vm);
2541 radv_info->last_radv_time = 0;
2545 /* adding or changing */
2550 pool_get (radv_info->adv_prefixes_pool, prefix);
2551 pi = prefix - radv_info->adv_prefixes_pool;
2552 mhash_set (&radv_info->address_to_prefix_index, prefix_addr, pi, /* old_value */ 0);
2554 memset(prefix, 0x0, sizeof(ip6_radv_prefix_t));
2556 prefix->prefix_len = prefix_len;
2557 clib_memcpy(&prefix->prefix, prefix_addr, sizeof(ip6_address_t));
2559 /* initialize default values */
2560 prefix->adv_on_link_flag = 1; /* L bit set */
2561 prefix->adv_autonomous_flag = 1; /* A bit set */
2562 prefix->adv_valid_lifetime_in_secs = DEF_ADV_VALID_LIFETIME;
2563 prefix->adv_pref_lifetime_in_secs = DEF_ADV_PREF_LIFETIME;
2564 prefix->enabled = 1;
2565 prefix->decrement_lifetime_flag = 1;
2566 prefix->deprecated_prefix_flag = 1;
2570 /* FIXME - Should the DP do this or the CP ?*/
2571 /* insert prefix into routing table as a connected prefix */
2580 if(prefix->prefix_len != prefix_len)
2581 return VNET_API_ERROR_INVALID_VALUE_2;
2585 /* FIXME - Should the DP do this or the CP ?*/
2586 /* remove from routing table if already there */
2590 if((val_lifetime == ~0) || (pref_lifetime == ~0))
2592 prefix->adv_valid_lifetime_in_secs = ~0;
2593 prefix->adv_pref_lifetime_in_secs = ~0;
2594 prefix->decrement_lifetime_flag = 0;
2598 prefix->adv_valid_lifetime_in_secs = val_lifetime;;
2599 prefix->adv_pref_lifetime_in_secs = pref_lifetime;
2602 /* copy remaining */
2603 prefix->enabled = !(no_advertise != 0);
2604 prefix->adv_on_link_flag = !((off_link != 0) || (no_onlink != 0));
2605 prefix->adv_autonomous_flag = !(no_autoconfig != 0);
2609 /* fill in the expiration times */
2610 prefix->valid_lifetime_expires = now + prefix->adv_valid_lifetime_in_secs;
2611 prefix->pref_lifetime_expires = now + prefix->adv_pref_lifetime_in_secs;
2613 radv_info->initial_adverts_sent = radv_info->initial_adverts_count -1;
2614 radv_info->next_multicast_time = vlib_time_now (vm);
2615 radv_info->last_multicast_time = vlib_time_now (vm);
2616 radv_info->last_radv_time = 0;
2622 ip6_neighbor_cmd(vlib_main_t * vm, unformat_input_t * main_input, vlib_cli_command_t * cmd)
2624 vnet_main_t * vnm = vnet_get_main();
2625 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
2626 clib_error_t * error = 0;
2628 u8 suppress = 0, managed = 0, other = 0;
2629 u8 suppress_ll_option = 0, send_unicast = 0, cease= 0;
2630 u8 use_lifetime = 0;
2631 u32 sw_if_index, ra_lifetime = 0, ra_initial_count = 0, ra_initial_interval = 0;
2632 u32 ra_max_interval = 0 , ra_min_interval = 0;
2634 unformat_input_t _line_input, * line_input = &_line_input;
2635 vnet_sw_interface_t * sw_if0;
2637 int add_radv_info = 1;
2638 __attribute__((unused)) ip6_radv_t * radv_info = 0;
2639 ip6_address_t ip6_addr;
2643 /* Get a line of input. */
2644 if (! unformat_user (main_input, unformat_line_input, line_input))
2647 /* get basic radv info for this interface */
2648 if(unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2651 if (unformat_user (line_input,
2652 unformat_vnet_sw_interface, vnm, &sw_if_index))
2655 ethernet_interface_t * eth_if0 = 0;
2657 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2658 if(sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2659 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2663 error = clib_error_return (0, "Interface must be of ethernet type");
2667 /* look up the radv_t information for this interface */
2668 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
2670 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2674 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2678 error = clib_error_return (0, "unknown interface %U'",
2679 format_unformat_error, line_input);
2685 error = clib_error_return (0, "invalid interface name %U'",
2686 format_unformat_error, line_input);
2691 /* get the rest of the command */
2692 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2694 if (unformat (line_input, "no"))
2696 else if(unformat (line_input, "prefix %U/%d",
2697 unformat_ip6_address, &ip6_addr,
2703 else if (unformat (line_input, "ra-managed-config-flag"))
2708 else if (unformat (line_input, "ra-other-config-flag"))
2713 else if (unformat (line_input, "ra-suppress") ||
2714 unformat (line_input, "ra-surpress"))
2719 else if (unformat (line_input, "ra-suppress-link-layer") ||
2720 unformat (line_input, "ra-surpress-link-layer"))
2722 suppress_ll_option = 1;
2725 else if (unformat (line_input, "ra-send-unicast"))
2730 else if (unformat (line_input, "ra-lifetime"))
2732 if (!unformat (line_input, "%d", &ra_lifetime))
2733 return(error = unformat_parse_error (line_input));
2737 else if (unformat (line_input, "ra-initial"))
2739 if (!unformat (line_input, "%d %d", &ra_initial_count, &ra_initial_interval))
2740 return(error = unformat_parse_error (line_input));
2743 else if (unformat (line_input, "ra-interval"))
2745 if (!unformat (line_input, "%d", &ra_max_interval))
2746 return(error = unformat_parse_error (line_input));
2748 if (!unformat (line_input, "%d", &ra_min_interval))
2749 ra_min_interval = 0;
2752 else if(unformat (line_input, "ra-cease"))
2758 return(unformat_parse_error (line_input));
2763 ip6_neighbor_ra_config(vm, sw_if_index,
2764 suppress, managed, other,
2765 suppress_ll_option, send_unicast, cease,
2766 use_lifetime, ra_lifetime,
2767 ra_initial_count, ra_initial_interval,
2768 ra_max_interval, ra_min_interval,
2773 u32 valid_lifetime_in_secs = 0;
2774 u32 pref_lifetime_in_secs = 0;
2775 u8 use_prefix_default_values = 0;
2776 u8 no_advertise = 0;
2778 u8 no_autoconfig = 0;
2781 /* get the rest of the command */
2782 while(unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2784 if(unformat (line_input, "default"))
2786 use_prefix_default_values = 1;
2789 else if(unformat (line_input, "infinite"))
2791 valid_lifetime_in_secs = ~0;
2792 pref_lifetime_in_secs = ~0;
2795 else if(unformat (line_input, "%d %d", &valid_lifetime_in_secs,
2796 &pref_lifetime_in_secs))
2803 /* get the rest of the command */
2804 while (!use_prefix_default_values &&
2805 unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2807 if(unformat (line_input, "no-advertise"))
2809 else if(unformat (line_input, "off-link"))
2811 else if(unformat (line_input, "no-autoconfig"))
2813 else if(unformat (line_input, "no-onlink"))
2816 return(unformat_parse_error (line_input));
2819 ip6_neighbor_ra_prefix(vm, sw_if_index,
2820 &ip6_addr, addr_len,
2821 use_prefix_default_values,
2822 valid_lifetime_in_secs,
2823 pref_lifetime_in_secs,
2831 unformat_free (line_input);
2838 ip6_print_addrs(vlib_main_t * vm,
2841 ip_lookup_main_t * lm = &ip6_main.lookup_main;
2844 for (i = 0; i < vec_len (addrs); i++)
2846 ip_interface_address_t * a = pool_elt_at_index(lm->if_address_pool, addrs[i]);
2847 ip6_address_t * address = ip_interface_address_get_address (lm, a);
2849 vlib_cli_output (vm, "\t\t%U/%d",
2850 format_ip6_address, address,
2855 static clib_error_t *
2856 show_ip6_interface_cmd (vlib_main_t * vm,
2857 unformat_input_t * input,
2858 vlib_cli_command_t * cmd)
2860 vnet_main_t * vnm = vnet_get_main();
2861 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
2862 clib_error_t * error = 0;
2867 if (unformat_user (input,
2868 unformat_vnet_sw_interface, vnm, &sw_if_index))
2872 /* look up the radv_t information for this interface */
2873 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
2875 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2879 ip_lookup_main_t * lm = &ip6_main.lookup_main;
2880 ip6_radv_t * radv_info;
2881 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2883 vlib_cli_output (vm, "%U is admin %s\n", format_vnet_sw_interface_name, vnm,
2884 vnet_get_sw_interface (vnm, sw_if_index),
2885 (vnet_sw_interface_is_admin_up (vnm, sw_if_index) ? "up" : "down"));
2888 u32 *link_scope = 0, *global_scope = 0;
2889 u32 *local_scope = 0, *unknown_scope = 0;
2890 ip_interface_address_t * a;
2892 vec_validate_init_empty (lm->if_address_pool_index_by_sw_if_index, sw_if_index, ~0);
2893 ai = lm->if_address_pool_index_by_sw_if_index[sw_if_index];
2895 while (ai != (u32)~0)
2897 a = pool_elt_at_index(lm->if_address_pool, ai);
2898 ip6_address_t * address = ip_interface_address_get_address (lm, a);
2900 if (ip6_address_is_link_local_unicast (address))
2901 vec_add1 (link_scope, ai);
2902 else if(ip6_address_is_global_unicast (address))
2903 vec_add1 (global_scope, ai);
2904 else if(ip6_address_is_local_unicast (address))
2905 vec_add1 (local_scope, ai);
2907 vec_add1 (unknown_scope, ai);
2909 ai = a->next_this_sw_interface;
2912 if (vec_len (link_scope))
2914 vlib_cli_output (vm, "\tLink-local address(es):\n");
2915 ip6_print_addrs (vm, link_scope);
2916 vec_free (link_scope);
2919 if (vec_len (local_scope))
2921 vlib_cli_output (vm, "\tLocal unicast address(es):\n");
2922 ip6_print_addrs (vm, local_scope);
2923 vec_free (local_scope);
2926 if (vec_len (global_scope))
2928 vlib_cli_output (vm, "\tGlobal unicast address(es):\n");
2929 ip6_print_addrs (vm, global_scope);
2930 vec_free (global_scope);
2933 if (vec_len (unknown_scope))
2935 vlib_cli_output (vm, "\tOther-scope address(es):\n");
2936 ip6_print_addrs (vm, unknown_scope);
2937 vec_free (unknown_scope);
2940 vlib_cli_output (vm, "\tJoined group address(es):\n");
2941 ip6_mldp_group_t *m;
2942 pool_foreach (m, radv_info->mldp_group_pool, ({
2943 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address, &m->mcast_address);
2946 vlib_cli_output (vm, "\tAdvertised Prefixes:\n");
2947 ip6_radv_prefix_t * p;
2948 pool_foreach (p, radv_info->adv_prefixes_pool, ({
2949 vlib_cli_output (vm, "\t\tprefix %U, length %d\n",
2950 format_ip6_address, &p->prefix, p->prefix_len);
2953 vlib_cli_output (vm, "\tMTU is %d\n", radv_info->adv_link_mtu);
2954 vlib_cli_output (vm, "\tICMP error messages are unlimited\n");
2955 vlib_cli_output (vm, "\tICMP redirects are disabled\n");
2956 vlib_cli_output (vm, "\tICMP unreachables are not sent\n");
2957 vlib_cli_output (vm, "\tND DAD is disabled\n");
2958 //vlib_cli_output (vm, "\tND reachable time is %d milliseconds\n",);
2959 vlib_cli_output (vm, "\tND advertised reachable time is %d\n",
2960 radv_info->adv_neighbor_reachable_time_in_msec);
2961 vlib_cli_output (vm, "\tND advertised retransmit interval is %d (msec)\n",
2962 radv_info->adv_time_in_msec_between_retransmitted_neighbor_solicitations);
2964 u32 ra_interval = radv_info->max_radv_interval;
2965 u32 ra_interval_min = radv_info->min_radv_interval;
2966 vlib_cli_output (vm, "\tND router advertisements are sent every %d seconds (min interval is %d)\n",
2967 ra_interval, ra_interval_min);
2968 vlib_cli_output (vm, "\tND router advertisements live for %d seconds\n",
2969 radv_info->adv_router_lifetime_in_sec);
2970 vlib_cli_output (vm, "\tHosts %s stateless autoconfig for addresses\n",
2971 (radv_info->adv_managed_flag) ? "use" :" don't use");
2972 vlib_cli_output (vm, "\tND router advertisements sent %d\n", radv_info->n_advertisements_sent);
2973 vlib_cli_output (vm, "\tND router solicitations received %d\n", radv_info->n_solicitations_rcvd);
2974 vlib_cli_output (vm, "\tND router solicitations dropped %d\n", radv_info->n_solicitations_dropped);
2978 error = clib_error_return (0, "IPv6 not enabled on interface",
2979 format_unformat_error, input);
2987 * This command is used to display various IPv6 attributes on a given
2991 * Example of how to display IPv6 settings:
2992 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
2993 * GigabitEthernet2/0/0 is admin up
2994 * Link-local address(es):
2996 * Joined group address(es):
3001 * Advertised Prefixes:
3002 * prefix fe80::fe:28ff:fe9c:75b3, length 64
3004 * ICMP error messages are unlimited
3005 * ICMP redirects are disabled
3006 * ICMP unreachables are not sent
3007 * ND DAD is disabled
3008 * ND advertised reachable time is 0
3009 * ND advertised retransmit interval is 0 (msec)
3010 * ND router advertisements are sent every 200 seconds (min interval is 150)
3011 * ND router advertisements live for 600 seconds
3012 * Hosts use stateless autoconfig for addresses
3013 * ND router advertisements sent 19336
3014 * ND router solicitations received 0
3015 * ND router solicitations dropped 0
3017 * Example of output if IPv6 is not enabled on the interface:
3018 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
3019 * show ip6 interface: IPv6 not enabled on interface
3023 VLIB_CLI_COMMAND (show_ip6_interface_command, static) = {
3024 .path = "show ip6 interface",
3025 .function = show_ip6_interface_cmd,
3026 .short_help = "show ip6 interface <interface>",
3031 disable_ip6_interface(vlib_main_t * vm,
3034 clib_error_t * error = 0;
3035 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3038 /* look up the radv_t information for this interface */
3039 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
3040 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3042 /* if not created - do nothing */
3045 vnet_main_t * vnm = vnet_get_main();
3046 ip6_radv_t * radv_info;
3048 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3050 /* check radv_info ref count for other ip6 addresses on this interface */
3051 if(radv_info->ref_count == 0 )
3053 /* essentially "disables" ipv6 on this interface */
3054 error = ip6_add_del_interface_address (vm, sw_if_index,
3055 &radv_info->link_local_address,
3056 radv_info->link_local_prefix_len,
3059 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, 0/* is_add */);
3066 ip6_interface_enabled(vlib_main_t * vm,
3069 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3072 /* look up the radv_t information for this interface */
3073 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
3075 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3081 enable_ip6_interface(vlib_main_t * vm,
3084 clib_error_t * error = 0;
3085 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3089 /* look up the radv_t information for this interface */
3090 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
3092 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3094 /* if not created yet */
3097 vnet_main_t * vnm = vnet_get_main();
3098 vnet_sw_interface_t * sw_if0;
3100 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
3101 if(sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
3103 ethernet_interface_t * eth_if0;
3105 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
3108 /* create radv_info. for this interface. This holds all the info needed for router adverts */
3109 ri = ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, is_add);
3113 ip6_radv_t * radv_info;
3114 ip6_address_t link_local_address;
3116 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3118 ip6_link_local_address_from_ethernet_mac_address (&link_local_address,
3121 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index);
3122 if(sw_if0->type == VNET_SW_INTERFACE_TYPE_SUB)
3124 /* make up an interface id */
3128 link_local_address.as_u64[0] = radv_info->randomizer;
3131 md5_add (&m, &link_local_address, 16);
3132 md5_finish (&m, digest);
3134 clib_memcpy(&link_local_address, digest, 16);
3136 radv_info->randomizer = link_local_address.as_u64[0];
3138 link_local_address.as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
3140 link_local_address.as_u8[8] &= 0xfd;
3143 /* essentially "enables" ipv6 on this interface */
3144 error = ip6_add_del_interface_address (vm, sw_if_index,
3145 &link_local_address,
3146 128 /* address width */,
3150 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, !is_add);
3153 radv_info->link_local_address = link_local_address;
3154 radv_info->link_local_prefix_len = 64;
3163 static clib_error_t *
3164 enable_ip6_interface_cmd (vlib_main_t * vm,
3165 unformat_input_t * input,
3166 vlib_cli_command_t * cmd)
3168 vnet_main_t * vnm = vnet_get_main();
3169 clib_error_t * error = 0;
3174 if (unformat_user (input,
3175 unformat_vnet_sw_interface, vnm, &sw_if_index))
3177 enable_ip6_interface(vm, sw_if_index);
3181 error = clib_error_return (0, "unknown interface\n'",
3182 format_unformat_error, input);
3189 * This command is used to enable IPv6 on a given interface.
3192 * Example of how enable IPv6 on a given interface:
3193 * @cliexcmd{enable ip6 interface GigabitEthernet2/0/0}
3196 VLIB_CLI_COMMAND (enable_ip6_interface_command, static) = {
3197 .path = "enable ip6 interface",
3198 .function = enable_ip6_interface_cmd,
3199 .short_help = "enable ip6 interface <interface>",
3203 static clib_error_t *
3204 disable_ip6_interface_cmd (vlib_main_t * vm,
3205 unformat_input_t * input,
3206 vlib_cli_command_t * cmd)
3208 vnet_main_t * vnm = vnet_get_main();
3209 clib_error_t * error = 0;
3214 if (unformat_user (input,
3215 unformat_vnet_sw_interface, vnm, &sw_if_index))
3217 error = disable_ip6_interface(vm, sw_if_index);
3221 error = clib_error_return (0, "unknown interface\n'",
3222 format_unformat_error, input);
3229 * This command is used to disable IPv6 on a given interface.
3232 * Example of how disable IPv6 on a given interface:
3233 * @cliexcmd{disable ip6 interface GigabitEthernet2/0/0}
3236 VLIB_CLI_COMMAND (disable_ip6_interface_command, static) = {
3237 .path = "disable ip6 interface",
3238 .function = disable_ip6_interface_cmd,
3239 .short_help = "disable ip6 interface <interface>",
3244 * This command is used to configure the neighbor discovery
3245 * parameters on a given interface. Use the '<em>show ip6 interface</em>'
3246 * command to display some of the current neighbor discovery parameters
3247 * on a given interface. This command has three formats:
3250 * <b>Format 1 - Router Advertisement Options:</b> (Only one can be entered in a single command)
3252 * '<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>'
3256 * <em>[no] ra-managed-config-flag</em> - Advertises in ICMPv6
3257 * router-advertisement messages to use stateful address
3258 * auto-configuration to obtain address information (sets the M-bit).
3259 * Default is the M-bit is not set and the '<em>no</em>' option
3260 * returns it to this default state.
3262 * <em>[no] ra-other-config-flag</em> - Indicates in ICMPv6
3263 * router-advertisement messages that hosts use stateful auto
3264 * configuration to obtain nonaddress related information (sets
3265 * the O-bit). Default is the O-bit is not set and the '<em>no</em>'
3266 * option returns it to this default state.
3268 * <em>[no] ra-suppress</em> - Disables sending ICMPv6 router-advertisement
3269 * messages. The '<em>no</em>' option implies to enable sending ICMPv6
3270 * router-advertisement messages.
3272 * <em>[no] ra-suppress-link-layer</em> - Indicates not to include the
3273 * optional source link-layer address in the ICMPv6 router-advertisement
3274 * messages. Default is to include the optional source link-layer address
3275 * and the '<em>no</em>' option returns it to this default state.
3277 * <em>[no] ra-send-unicast</em> - Use the source address of the
3278 * router-solicitation message if availiable. The default is to use
3279 * multicast address of all nodes, and the '<em>no</em>' option returns
3280 * it to this default state.
3282 * <em>[no] ra-lifetime <lifetime></em> - Advertises the lifetime of a
3283 * default router in ICMPv6 router-advertisement messages. The range is
3284 * from 0 to 9000 seconds. '<em><lifetime></em>' must be greater than
3285 * '<em><max-interval></em>'. The default value is 600 seconds and the
3286 * '<em>no</em>' option returns it to this default value.
3288 * <em>[no] ra-initial <cnt> <interval></em> - Number of initial ICMPv6
3289 * router-advertisement messages sent and the interval between each
3290 * message. Range for count is 1 - 3 and default is 3. Range for interval
3291 * is 1 to 16 seconds, and default is 16 seconds. The '<em>no</em>' option
3292 * returns both to their default value.
3294 * <em>[no] ra-interval <max-interval> [<min-interval>]</em> - Configures the
3295 * interval between sending ICMPv6 router-advertisement messages. The
3296 * range for max-interval is from 4 to 200 seconds. min-interval can not
3297 * be more than 75% of max-interval. If not set, min-interval will be
3298 * set to 75% of max-interval. The range for min-interval is from 3 to
3299 * 150 seconds. The '<em>no</em>' option returns both to their default
3302 * <em>[no] ra-cease</em> - Cease sending ICMPv6 router-advertisement messages.
3303 * The '<em>no</em>' options implies to start (or restart) sending
3304 * ICMPv6 router-advertisement messages.
3307 * <b>Format 2 - Prefix Options:</b>
3309 * '<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>'
3313 * <em>no</em> - All additional flags are ignored and the prefix is deleted.
3315 * <em><valid-lifetime> <pref-lifetime></em> - '<em><valid-lifetime></em>' is the
3316 * length of time in seconds during what the prefix is valid for the purpose of
3317 * on-link determination. Range is 7203 to 2592000 seconds and default is 2592000
3318 * seconds (30 days). '<em><pref-lifetime></em>' is the prefered-lifetime and is the
3319 * length of time in seconds during what addresses generated from the prefix remain
3320 * preferred. Range is 0 to 604800 seconds and default is 604800 seconds (7 days).
3322 * <em>infinite</em> - Both '<em><valid-lifetime></em>' and '<em><<pref-lifetime></em>'
3323 * are inifinte, no timeout.
3325 * <em>no-advertise</em> - Do not send full router address in prefix
3326 * advertisement. Default is to advertise (i.e. - This flag is off by default).
3328 * <em>off-link</em> - Prefix is off-link, clear L-bit in packet. Default is on-link
3329 * (i.e. - This flag is off and L-bit in packet is set by default and this prefix can
3330 * be used for on-link determination). '<em>no-onlink</em>' also controls the L-bit.
3332 * <em>no-autoconfig</em> - Do not use prefix for autoconfiguration, clear A-bit in packet.
3333 * Default is autoconfig (i.e. - This flag is off and A-bit in packet is set by default.
3335 * <em>no-onlink</em> - Do not use prefix for onlink determination, clear L-bit in packet.
3336 * Default is on-link (i.e. - This flag is off and L-bit in packet is set by default and
3337 * this prefix can be used for on-link determination). '<em>off-link</em>' also controls
3341 * <b>Format 3: - Default of Prefix:</b>
3343 * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> default</b></em>'
3345 * When a new prefix is added (or existing one is being overwritten) <em>default</em>
3346 * uses default values for the prefix. If <em>no</em> is used, the <em>default</em>
3347 * is ignored and the prefix is deleted.
3351 * Example of how set a router advertisement option:
3352 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 ra-interval 100 20}
3353 * Example of how to add a prefix:
3354 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 prefix fe80::fe:28ff:fe9c:75b3/64 infinite no-advertise}
3355 * Example of how to delete a prefix:
3356 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 no prefix fe80::fe:28ff:fe9c:75b3/64}
3359 VLIB_CLI_COMMAND (ip6_nd_command, static) = {
3361 .short_help = "ip6 nd <interface> ...",
3362 .function = ip6_neighbor_cmd,
3367 set_ip6_link_local_address(vlib_main_t * vm,
3369 ip6_address_t *address,
3372 clib_error_t * error = 0;
3373 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3375 ip6_radv_t * radv_info;
3376 vnet_main_t * vnm = vnet_get_main();
3378 if( !ip6_address_is_link_local_unicast (address))
3380 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_LINK_LOCAL;
3381 return(error = clib_error_return (0, "address not link-local",
3382 format_unformat_error));
3385 /* call enable ipv6 */
3386 enable_ip6_interface(vm, sw_if_index);
3388 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3392 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3394 /* save if link local address (overwrite default) */
3396 /* delete the old one */
3397 error = ip6_add_del_interface_address (vm, sw_if_index,
3398 &radv_info->link_local_address,
3399 radv_info->link_local_prefix_len /* address width */,
3404 /* add the new one */
3405 error = ip6_add_del_interface_address (vm, sw_if_index,
3407 address_length /* address width */,
3412 radv_info->link_local_address = *address;
3413 radv_info->link_local_prefix_len = address_length;
3419 vnm->api_errno = VNET_API_ERROR_IP6_NOT_ENABLED;
3420 error = clib_error_return (0, "ip6 not enabled for interface",
3421 format_unformat_error);
3427 set_ip6_link_local_address_cmd (vlib_main_t * vm,
3428 unformat_input_t * input,
3429 vlib_cli_command_t * cmd)
3431 vnet_main_t * vnm = vnet_get_main();
3432 clib_error_t * error = 0;
3434 ip6_address_t ip6_addr;
3437 if (unformat_user (input,
3438 unformat_vnet_sw_interface, vnm, &sw_if_index))
3440 /* get the rest of the command */
3441 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3443 if(unformat (input, "%U/%d",
3444 unformat_ip6_address, &ip6_addr,
3448 return(unformat_parse_error (input));
3451 error = set_ip6_link_local_address(vm,
3459 * This command is used to assign an IPv6 Link-local address to an
3460 * interface. This command will enable IPv6 on an interface if it
3461 * is not already enabled. Use the '<em>show ip6 interface</em>' command
3462 * to display the assigned Link-local address.
3465 * Example of how to assign an IPv6 Link-local address to an interface:
3466 * @cliexcmd{set ip6 link-local address GigabitEthernet2/0/0 FE80::AB8/64}
3469 VLIB_CLI_COMMAND (set_ip6_link_local_address_command, static) = {
3470 .path = "set ip6 link-local address",
3471 .short_help = "set ip6 link-local address <interface> <ip6-address>/<width>",
3472 .function = set_ip6_link_local_address_cmd,
3476 /* callback when an interface address is added or deleted */
3478 ip6_neighbor_add_del_interface_address (ip6_main_t * im,
3481 ip6_address_t * address,
3483 u32 if_address_index,
3486 vnet_main_t * vnm = vnet_get_main();
3487 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3489 vlib_main_t * vm = vnm->vlib_main;
3490 ip6_radv_t * radv_info;
3492 ip6_mldp_group_t *mcast_group_info;
3494 /* create solicited node multicast address for this interface adddress */
3495 ip6_set_solicited_node_multicast_address (&a, 0);
3497 a.as_u8[0xd] = address->as_u8[0xd];
3498 a.as_u8[0xe] = address->as_u8[0xe];
3499 a.as_u8[0xf] = address->as_u8[0xf];
3503 /* try to create radv_info - does nothing if ipv6 already enabled */
3504 enable_ip6_interface(vm, sw_if_index);
3506 /* look up the radv_t information for this interface */
3507 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
3508 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3512 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3515 if( !ip6_address_is_link_local_unicast (address))
3516 radv_info->ref_count++;
3518 /* lookup prefix info for this address on this interface */
3519 uword * p = mhash_get (&radv_info->address_to_mldp_index, &a);
3520 mcast_group_info = p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
3522 /* add -solicted node multicast address */
3523 if(!mcast_group_info)
3527 pool_get (radv_info->mldp_group_pool, mcast_group_info);
3529 mi = mcast_group_info - radv_info->mldp_group_pool;
3530 mhash_set (&radv_info->address_to_mldp_index, &a, mi, /* old_value */ 0);
3532 mcast_group_info->type = 4;
3533 mcast_group_info->mcast_source_address_pool = 0;
3534 mcast_group_info->num_sources = 0;
3535 clib_memcpy(&mcast_group_info->mcast_address, &a, sizeof(ip6_address_t));
3543 /* look up the radv_t information for this interface */
3544 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
3545 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3549 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3551 /* lookup prefix info for this address on this interface */
3552 uword * p = mhash_get (&radv_info->address_to_mldp_index, &a);
3553 mcast_group_info = p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
3555 if(mcast_group_info)
3557 mhash_unset (&radv_info->address_to_mldp_index, &a,/* old_value */ 0);
3558 pool_put (radv_info->mldp_group_pool, mcast_group_info);
3561 /* if interface up send MLDP "report" */
3562 radv_info->all_routers_mcast = 0;
3565 if( !ip6_address_is_link_local_unicast (address))
3566 radv_info->ref_count--;
3571 clib_error_t *ip6_set_neighbor_limit (u32 neighbor_limit)
3573 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3575 nm->limit_neighbor_cache_size = neighbor_limit;
3579 static clib_error_t * ip6_neighbor_init (vlib_main_t * vm)
3581 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3582 ip6_main_t * im = &ip6_main;
3584 mhash_init (&nm->neighbor_index_by_key,
3585 /* value size */ sizeof (uword),
3586 /* key size */ sizeof (ip6_neighbor_key_t));
3588 icmp6_register_type (vm, ICMP6_neighbor_solicitation, ip6_icmp_neighbor_solicitation_node.index);
3589 icmp6_register_type (vm, ICMP6_neighbor_advertisement, ip6_icmp_neighbor_advertisement_node.index);
3590 icmp6_register_type (vm, ICMP6_router_solicitation, ip6_icmp_router_solicitation_node.index);
3591 icmp6_register_type (vm, ICMP6_router_advertisement, ip6_icmp_router_advertisement_node.index);
3593 /* handler node for ip6 neighbor discovery events and timers */
3594 vlib_register_node (vm, &ip6_icmp_neighbor_discovery_event_node);
3596 /* add call backs */
3597 ip6_add_del_interface_address_callback_t cb;
3598 memset(&cb, 0x0, sizeof(ip6_add_del_interface_address_callback_t));
3600 /* when an interface address changes... */
3601 cb.function = ip6_neighbor_add_del_interface_address;
3602 cb.function_opaque = 0;
3603 vec_add1 (im->add_del_interface_address_callbacks, cb);
3605 mhash_init (&nm->pending_resolutions_by_address,
3606 /* value size */ sizeof (uword),
3607 /* key size */ sizeof (ip6_address_t));
3609 mhash_init (&nm->mac_changes_by_address,
3610 /* value size */ sizeof (uword),
3611 /* key size */ sizeof (ip6_address_t));
3613 /* default, configurable */
3614 nm->limit_neighbor_cache_size = 50000;
3617 /* $$$$ Hack fix for today */
3618 vec_validate_init_empty
3619 (im->discover_neighbor_next_index_by_hw_if_index, 32, 0 /* drop */);
3625 VLIB_INIT_FUNCTION (ip6_neighbor_init);
3628 void vnet_register_ip6_neighbor_resolution_event (vnet_main_t * vnm,
3634 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3635 ip6_address_t * address = address_arg;
3637 pending_resolution_t * pr;
3639 pool_get (nm->pending_resolutions, pr);
3641 pr->next_index = ~0;
3642 pr->node_index = node_index;
3643 pr->type_opaque = type_opaque;
3646 p = mhash_get (&nm->pending_resolutions_by_address, address);
3649 /* Insert new resolution at the head of the list */
3650 pr->next_index = p[0];
3651 mhash_unset (&nm->pending_resolutions_by_address, address, 0);
3654 mhash_set (&nm->pending_resolutions_by_address, address,
3655 pr - nm->pending_resolutions, 0 /* old value */);
3658 int vnet_add_del_ip6_nd_change_event (vnet_main_t * vnm,
3659 void * data_callback,
3667 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3668 ip6_address_t * address = address_arg;
3670 pending_resolution_t * mc;
3671 void (*fp)(u32, u8 *) = data_callback;
3675 pool_get (nm->mac_changes, mc);
3677 mc->next_index = ~0;
3678 mc->node_index = node_index;
3679 mc->type_opaque = type_opaque;
3681 mc->data_callback = data_callback;
3684 p = mhash_get (&nm->mac_changes_by_address, address);
3687 /* Insert new resolution at the head of the list */
3688 mc->next_index = p[0];
3689 mhash_unset (&nm->mac_changes_by_address, address, 0);
3692 mhash_set (&nm->mac_changes_by_address, address,
3693 mc - nm->mac_changes, 0);
3699 pending_resolution_t * mc_last = 0;
3701 p = mhash_get (&nm->mac_changes_by_address, address);
3703 return VNET_API_ERROR_NO_SUCH_ENTRY;
3707 while (index != (u32)~0)
3709 mc = pool_elt_at_index (nm->mac_changes, index);
3710 if (mc->node_index == node_index &&
3711 mc->type_opaque == type_opaque &&
3714 /* Clients may need to clean up pool entries, too */
3716 (*fp)(mc->data, 0 /* no new mac addrs */);
3719 mhash_unset (&nm->mac_changes_by_address, address, 0);
3720 if (mc->next_index != ~0)
3721 mhash_set (&nm->mac_changes_by_address, address,
3723 pool_put (nm->mac_changes, mc);
3729 mc_last->next_index = mc->next_index;
3730 pool_put (nm->mac_changes, mc);
3735 index = mc->next_index;
3738 return VNET_API_ERROR_NO_SUCH_ENTRY;
3742 int vnet_ip6_nd_term (vlib_main_t * vm,
3743 vlib_node_runtime_t * node,
3745 ethernet_header_t * eth,
3751 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3752 icmp6_neighbor_solicitation_or_advertisement_header_t * ndh;
3753 pending_resolution_t * mc;
3756 ndh = ip6_next_header (ip);
3757 if (ndh->icmp.type != ICMP6_neighbor_solicitation &&
3758 ndh->icmp.type != ICMP6_neighbor_advertisement)
3761 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
3762 (p0->flags & VLIB_BUFFER_IS_TRACED)))
3764 u8 *t0 = vlib_add_trace (vm, node, p0,
3765 sizeof (icmp6_input_trace_t));
3766 clib_memcpy (t0, ip, sizeof (icmp6_input_trace_t));
3769 /* Check if anyone want ND events for L2 BDs */
3770 p = mhash_get (&nm->mac_changes_by_address, &ip6a_zero);
3771 if (p && shg == 0 && /* Only SHG 0 interface which is more likely local */
3772 !ip6_address_is_link_local_unicast (&ip->src_address))
3774 u32 next_index = p[0];
3775 while (next_index != (u32)~0)
3777 int (*fp)(u32, u8 *, u32, ip6_address_t *);
3779 mc = pool_elt_at_index (nm->mac_changes, next_index);
3780 fp = mc->data_callback;
3781 /* Call the callback, return 1 to suppress dup events */
3782 if (fp) rv = (*fp)(mc->data,
3786 /* Signal the resolver process */
3788 vlib_process_signal_event (vm, mc->node_index,
3791 next_index = mc->next_index;
3795 /* Check if MAC entry exsist for solicited target IP */
3796 if (ndh->icmp.type == ICMP6_neighbor_solicitation)
3798 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t * opt;
3799 l2_bridge_domain_t *bd_config;
3802 opt = (void *) (ndh + 1);
3803 if ((opt->header.type !=
3804 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address) ||
3805 (opt->header.n_data_u64s != 1))
3806 return 0; /* source link layer address option not present */
3808 bd_config = vec_elt_at_index (l2input_main.bd_configs, bd_index);
3809 macp = (u8 *) hash_get_mem (bd_config->mac_by_ip6, &ndh->target_address);
3811 { /* found ip-mac entry, generate eighbor advertisement response */
3813 vlib_node_runtime_t * error_node =
3814 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
3815 ip->dst_address = ip->src_address;
3816 ip->src_address = ndh->target_address;
3817 ip->hop_limit = 255;
3819 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
3820 clib_memcpy (opt->ethernet_address, macp, 6);
3821 ndh->icmp.type = ICMP6_neighbor_advertisement;
3822 ndh->advertisement_flags = clib_host_to_net_u32
3823 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED |
3824 ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
3825 ndh->icmp.checksum = 0;
3826 ndh->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum(vm, p0, ip,
3828 clib_memcpy(eth->dst_address, eth->src_address, 6);
3829 clib_memcpy(eth->src_address, macp, 6);
3830 vlib_error_count (vm, error_node->node_index,
3831 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX, 1);
3841 ethernet_ndp_change_mac (vlib_main_t * vm, u32 sw_if_index)
3843 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3847 pool_foreach (n, nm->neighbor_pool, ({
3848 if (n->key.sw_if_index == sw_if_index)
3850 adj_nbr_walk_nh6 (sw_if_index,
3851 &n->key.ip6_address,
3852 ip6_nd_mk_complete_walk, n);