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,
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_RX] = adj_index0;
1476 radv_info->n_solicitations_dropped += is_dropped;
1477 radv_info->n_solicitations_rcvd += is_solicitation;
1479 if((error0 == ICMP6_ERROR_NONE) && !is_dropped)
1481 radv_info->n_advertisements_sent++;
1482 n_advertisements_sent++;
1488 p0->error = error_node->errors[error0];
1490 if(error0 != ICMP6_ERROR_NONE)
1491 vlib_error_count (vm, error_node->node_index, error0, 1);
1493 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1494 to_next, n_left_to_next,
1499 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1502 /* Account for router advertisements sent. */
1503 vlib_error_count (vm, error_node->node_index, ICMP6_ERROR_ROUTER_ADVERTISEMENTS_TX, n_advertisements_sent);
1505 return frame->n_vectors;
1508 /* validate advertised info for consistancy (see RFC-4861 section 6.2.7) - log any inconsistencies, packet will always be dropped */
1509 static_always_inline uword
1510 icmp6_router_advertisement(vlib_main_t * vm,
1511 vlib_node_runtime_t * node,
1512 vlib_frame_t * frame)
1514 vnet_main_t * vnm = vnet_get_main();
1515 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
1516 uword n_packets = frame->n_vectors;
1517 u32 * from, * to_next;
1518 u32 n_left_from, n_left_to_next, next_index;
1519 u32 n_advertisements_rcvd = 0;
1521 vlib_node_runtime_t * error_node = vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1523 from = vlib_frame_vector_args (frame);
1524 n_left_from = n_packets;
1525 next_index = node->cached_next_index;
1527 if (node->flags & VLIB_NODE_FLAG_TRACE)
1528 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1530 sizeof (icmp6_input_trace_t));
1532 while (n_left_from > 0)
1534 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1536 while (n_left_from > 0 && n_left_to_next > 0)
1540 ip6_radv_t *radv_info = 0;
1541 icmp6_router_advertisement_header_t * h0;
1542 u32 bi0, options_len0, sw_if_index0, next0, error0;
1544 bi0 = to_next[0] = from[0];
1549 n_left_to_next -= 1;
1551 p0 = vlib_get_buffer (vm, bi0);
1552 ip0 = vlib_buffer_get_current (p0);
1553 h0 = ip6_next_header (ip0);
1554 options_len0 = clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1556 error0 = ICMP6_ERROR_NONE;
1557 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1559 /* Check that source address is link-local*/
1560 error0 = (!ip6_address_is_link_local_unicast (&ip0->src_address)) ?
1561 ICMP6_ERROR_ROUTER_ADVERTISEMENT_SOURCE_NOT_LINK_LOCAL : error0;
1563 /* default is to drop */
1564 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1566 n_advertisements_rcvd++;
1568 if (error0 == ICMP6_ERROR_NONE)
1570 vnet_sw_interface_t * sw_if0;
1571 ethernet_interface_t * eth_if0;
1573 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1574 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1575 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1577 /* only support ethernet interface type for now */
1578 error0 = (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF : error0;
1580 if (error0 == ICMP6_ERROR_NONE)
1584 /* look up the radv_t information for this interface */
1585 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
1587 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1590 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1592 error0 = ((!radv_info) ? ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG : error0);
1594 if (error0 == ICMP6_ERROR_NONE)
1596 /* validate advertised information */
1597 if((h0->current_hop_limit && radv_info->curr_hop_limit) &&
1598 (h0->current_hop_limit != radv_info->curr_hop_limit))
1600 ip6_neighbor_syslog(vm, LOG_WARNING,
1601 "our AdvCurHopLimit on %U doesn't agree with %U",
1602 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1605 if((h0->flags & ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP) !=
1606 radv_info->adv_managed_flag)
1608 ip6_neighbor_syslog(vm, LOG_WARNING,
1609 "our AdvManagedFlag on %U doesn't agree with %U",
1610 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1613 if((h0->flags & ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP) !=
1614 radv_info->adv_other_flag)
1616 ip6_neighbor_syslog(vm, LOG_WARNING,
1617 "our AdvOtherConfigFlag on %U doesn't agree with %U",
1618 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1621 if((h0->time_in_msec_between_retransmitted_neighbor_solicitations &&
1622 radv_info->adv_time_in_msec_between_retransmitted_neighbor_solicitations) &&
1623 (h0->time_in_msec_between_retransmitted_neighbor_solicitations !=
1624 clib_host_to_net_u32(radv_info->adv_time_in_msec_between_retransmitted_neighbor_solicitations)))
1626 ip6_neighbor_syslog(vm, LOG_WARNING,
1627 "our AdvRetransTimer on %U doesn't agree with %U",
1628 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1631 if((h0->neighbor_reachable_time_in_msec &&
1632 radv_info->adv_neighbor_reachable_time_in_msec) &&
1633 (h0->neighbor_reachable_time_in_msec !=
1634 clib_host_to_net_u32(radv_info->adv_neighbor_reachable_time_in_msec)))
1636 ip6_neighbor_syslog(vm, LOG_WARNING,
1637 "our AdvReachableTime on %U doesn't agree with %U",
1638 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1641 /* check for MTU or prefix options or .. */
1642 u8 * opt_hdr = (u8 *)(h0 + 1);
1643 while( options_len0 > 0)
1645 icmp6_neighbor_discovery_option_header_t *o0 = ( icmp6_neighbor_discovery_option_header_t *)opt_hdr;
1646 int opt_len = o0->n_data_u64s << 3;
1647 icmp6_neighbor_discovery_option_type_t option_type = o0->type;
1649 if(options_len0 < 2)
1651 ip6_neighbor_syslog(vm, LOG_ERR,
1652 "malformed RA packet on %U from %U",
1653 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1659 ip6_neighbor_syslog(vm, LOG_ERR,
1660 " zero length option in RA on %U from %U",
1661 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1664 else if( opt_len > options_len0)
1666 ip6_neighbor_syslog(vm, LOG_ERR,
1667 "option length in RA packet greater than total length on %U from %U",
1668 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1672 options_len0 -= opt_len;
1677 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu:
1679 icmp6_neighbor_discovery_mtu_option_t *h =
1680 (icmp6_neighbor_discovery_mtu_option_t *)(o0);
1682 if(opt_len < sizeof(*h))
1685 if((h->mtu && radv_info->adv_link_mtu) &&
1686 (h->mtu != clib_host_to_net_u32(radv_info->adv_link_mtu)))
1688 ip6_neighbor_syslog(vm, LOG_WARNING,
1689 "our AdvLinkMTU on %U doesn't agree with %U",
1690 format_vnet_sw_if_index_name, vnm, sw_if_index0, format_ip6_address, &ip0->src_address);
1695 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information:
1697 icmp6_neighbor_discovery_prefix_information_option_t *h =
1698 (icmp6_neighbor_discovery_prefix_information_option_t *)(o0);
1700 /* validate advertised prefix options */
1701 ip6_radv_prefix_t *pr_info;
1702 u32 preferred, valid;
1704 if(opt_len < sizeof(*h))
1707 preferred = clib_net_to_host_u32(h->preferred_time);
1708 valid = clib_net_to_host_u32(h->valid_time);
1710 /* look for matching prefix - if we our advertising it, it better be consistant */
1711 pool_foreach (pr_info, radv_info->adv_prefixes_pool, ({
1714 ip6_address_mask_from_width(&mask, pr_info->prefix_len);
1716 if(pr_info->enabled &&
1717 (pr_info->prefix_len == h->dst_address_length) &&
1718 ip6_address_is_equal_masked (&pr_info->prefix, &h->dst_address, &mask))
1721 if(!pr_info->decrement_lifetime_flag &&
1722 valid != pr_info->adv_valid_lifetime_in_secs)
1724 ip6_neighbor_syslog(vm, LOG_WARNING,
1725 "our ADV validlifetime on %U for %U does not agree with %U",
1726 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
1727 format_ip6_address, &h->dst_address);
1729 if(!pr_info->decrement_lifetime_flag &&
1730 preferred != pr_info->adv_pref_lifetime_in_secs)
1732 ip6_neighbor_syslog(vm, LOG_WARNING,
1733 "our ADV preferredlifetime on %U for %U does not agree with %U",
1734 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
1735 format_ip6_address, &h->dst_address);
1751 p0->error = error_node->errors[error0];
1753 if(error0 != ICMP6_ERROR_NONE)
1754 vlib_error_count (vm, error_node->node_index, error0, 1);
1756 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1757 to_next, n_left_to_next,
1761 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1764 /* Account for router advertisements sent. */
1765 vlib_error_count (vm, error_node->node_index, ICMP6_ERROR_ROUTER_ADVERTISEMENTS_RX, n_advertisements_rcvd);
1767 return frame->n_vectors;
1770 /* create and initialize router advertisement parameters with default values for this intfc */
1772 ip6_neighbor_sw_interface_add_del (vnet_main_t * vnm,
1776 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
1779 vnet_sw_interface_t * sw_if0;
1780 ethernet_interface_t * eth_if0 = 0;
1782 /* lookup radv container - ethernet interfaces only */
1783 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
1784 if(sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
1785 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1790 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
1791 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
1795 a = pool_elt_at_index (nm->if_radv_pool, ri);
1799 u32 i, * to_delete = 0;
1800 ip6_radv_prefix_t *p;
1801 ip6_mldp_group_t *m;
1803 /* remove adjacencies */
1804 adj_unlock(a->all_nodes_adj_index);
1805 adj_unlock(a->all_routers_adj_index);
1806 adj_unlock(a->all_mldv2_routers_adj_index);
1808 /* clean up prefix_pool */
1809 pool_foreach (p, a->adv_prefixes_pool, ({
1810 vec_add1 (to_delete, p - a->adv_prefixes_pool);
1813 for (i = 0; i < vec_len (to_delete); i++)
1815 p = pool_elt_at_index (a->adv_prefixes_pool, to_delete[i]);
1816 mhash_unset (&a->address_to_prefix_index, &p->prefix, 0);
1817 pool_put (a->adv_prefixes_pool, p);
1820 vec_free (to_delete);
1823 /* clean up mldp group pool */
1824 pool_foreach (m, a->mldp_group_pool, ({
1825 vec_add1 (to_delete, m - a->mldp_group_pool);
1828 for (i = 0; i < vec_len (to_delete); i++)
1830 m = pool_elt_at_index (a->mldp_group_pool, to_delete[i]);
1831 mhash_unset (&a->address_to_mldp_index, &m->mcast_address, 0);
1832 pool_put (a->mldp_group_pool, m);
1835 vec_free (to_delete);
1837 pool_put (nm->if_radv_pool, a);
1838 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ~0;
1846 vnet_hw_interface_t * hw_if0;
1848 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index);
1850 pool_get (nm->if_radv_pool, a);
1852 ri = a - nm->if_radv_pool;
1853 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ri;
1855 /* initialize default values (most of which are zero) */
1856 memset (a, 0, sizeof (a[0]));
1858 a->sw_if_index = sw_if_index;
1860 a->max_radv_interval = DEF_MAX_RADV_INTERVAL;
1861 a->min_radv_interval = DEF_MIN_RADV_INTERVAL;
1862 a->curr_hop_limit = DEF_CURR_HOP_LIMIT;
1863 a->adv_router_lifetime_in_sec = DEF_DEF_RTR_LIFETIME;
1865 a->adv_link_layer_address = 1; /* send ll address source address option */
1867 a->min_delay_between_radv = MIN_DELAY_BETWEEN_RAS;
1868 a->max_delay_between_radv = MAX_DELAY_BETWEEN_RAS;
1869 a->max_rtr_default_lifetime = MAX_DEF_RTR_LIFETIME;
1870 a->seed = (u32) clib_cpu_time_now();
1871 (void) random_u32 (&a->seed);
1872 a->randomizer = clib_cpu_time_now();
1873 (void) random_u64 (&a->randomizer);
1875 a->initial_adverts_count = MAX_INITIAL_RTR_ADVERTISEMENTS ;
1876 a->initial_adverts_sent = a->initial_adverts_count-1;
1877 a->initial_adverts_interval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
1879 /* deafult is to send */
1882 /* fill in radv_info for this interface that will be needed later */
1883 a->adv_link_mtu = hw_if0->max_l3_packet_bytes[VLIB_RX];
1885 clib_memcpy (a->link_layer_address, eth_if0->address, 6);
1887 /* fill in default link-local address (this may be overridden) */
1888 ip6_link_local_address_from_ethernet_address (&a->link_local_address, eth_if0->address);
1889 a->link_local_prefix_len = 64;
1891 mhash_init (&a->address_to_prefix_index, sizeof (uword), sizeof (ip6_address_t));
1892 mhash_init (&a->address_to_mldp_index, sizeof (uword), sizeof (ip6_address_t));
1895 u8 link_layer_address[6] =
1896 {0x33, 0x33, 0x00, 0x00, 0x00, IP6_MULTICAST_GROUP_ID_all_hosts};
1898 a->all_nodes_adj_index = adj_rewrite_add_and_lock(FIB_PROTOCOL_IP6,
1901 link_layer_address);
1905 u8 link_layer_address[6] =
1906 {0x33, 0x33, 0x00, 0x00, 0x00, IP6_MULTICAST_GROUP_ID_all_routers};
1908 a->all_routers_adj_index = adj_rewrite_add_and_lock(FIB_PROTOCOL_IP6,
1911 link_layer_address);
1915 u8 link_layer_address[6] =
1916 {0x33, 0x33, 0x00, 0x00, 0x00, IP6_MULTICAST_GROUP_ID_mldv2_routers};
1918 a->all_mldv2_routers_adj_index =
1919 adj_rewrite_add_and_lock(FIB_PROTOCOL_IP6,
1922 link_layer_address);
1925 /* add multicast groups we will always be reporting */
1927 ip6_mldp_group_t *mcast_group_info;
1929 ip6_set_reserved_multicast_address (&addr,
1930 IP6_MULTICAST_SCOPE_link_local,
1931 IP6_MULTICAST_GROUP_ID_all_hosts);
1933 /* lookup mldp info for this interface */
1935 uword * p = mhash_get (&a->address_to_mldp_index, &addr);
1936 mcast_group_info = p ? pool_elt_at_index (a->mldp_group_pool, p[0]) : 0;
1939 if(!mcast_group_info)
1943 pool_get (a->mldp_group_pool, mcast_group_info);
1945 mi = mcast_group_info - a->mldp_group_pool;
1946 mhash_set (&a->address_to_mldp_index, &addr, mi, /* old_value */ 0);
1948 mcast_group_info->type = 4;
1949 mcast_group_info->mcast_source_address_pool = 0;
1950 mcast_group_info->num_sources = 0;
1951 clib_memcpy(&mcast_group_info->mcast_address, &addr, sizeof(ip6_address_t));
1954 ip6_set_reserved_multicast_address (&addr,
1955 IP6_MULTICAST_SCOPE_link_local,
1956 IP6_MULTICAST_GROUP_ID_all_routers);
1958 p = mhash_get (&a->address_to_mldp_index, &addr);
1959 mcast_group_info = p ? pool_elt_at_index (a->mldp_group_pool, p[0]) : 0;
1961 if(!mcast_group_info)
1965 pool_get (a->mldp_group_pool, mcast_group_info);
1967 mi = mcast_group_info - a->mldp_group_pool;
1968 mhash_set (&a->address_to_mldp_index, &addr, mi, /* old_value */ 0);
1970 mcast_group_info->type = 4;
1971 mcast_group_info->mcast_source_address_pool = 0;
1972 mcast_group_info->num_sources = 0;
1973 clib_memcpy(&mcast_group_info->mcast_address, &addr, sizeof(ip6_address_t));
1976 ip6_set_reserved_multicast_address (&addr,
1977 IP6_MULTICAST_SCOPE_link_local,
1978 IP6_MULTICAST_GROUP_ID_mldv2_routers);
1980 p = mhash_get (&a->address_to_mldp_index, &addr);
1981 mcast_group_info = p ? pool_elt_at_index (a->mldp_group_pool, p[0]) : 0;
1983 if(!mcast_group_info)
1987 pool_get (a->mldp_group_pool, mcast_group_info);
1989 mi = mcast_group_info - a->mldp_group_pool;
1990 mhash_set (&a->address_to_mldp_index, &addr, mi, /* old_value */ 0);
1992 mcast_group_info->type = 4;
1993 mcast_group_info->mcast_source_address_pool = 0;
1994 mcast_group_info->num_sources = 0;
1995 clib_memcpy(&mcast_group_info->mcast_address, &addr, sizeof(ip6_address_t));
2002 /* send an mldpv2 report */
2004 ip6_neighbor_send_mldpv2_report(u32 sw_if_index)
2006 vnet_main_t * vnm = vnet_get_main();
2007 vlib_main_t * vm = vnm->vlib_main;
2008 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
2009 vnet_sw_interface_t * sw_if0;
2010 ethernet_interface_t * eth_if0;
2014 ip6_radv_t *radv_info;
2024 icmp6_multicast_listener_report_header_t *rh0;
2025 icmp6_multicast_listener_report_packet_t *rp0;
2027 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2028 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
2029 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2031 if (!eth_if0 || !vnet_sw_interface_is_admin_up (vnm, sw_if_index))
2034 /* look up the radv_t information for this interface */
2035 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
2037 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2042 /* send report now - build a mldpv2 report packet */
2043 n_allocated = vlib_buffer_alloc_from_free_list(vm,
2046 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2047 if (PREDICT_FALSE(n_allocated == 0))
2049 clib_warning ("buffer allocation failure");
2053 b0 = vlib_get_buffer (vm, bo0);
2055 /* adjust the sizeof the buffer to just include the ipv6 header */
2056 b0->current_length = sizeof(icmp6_multicast_listener_report_packet_t);
2058 payload_length = sizeof(icmp6_multicast_listener_report_header_t);
2060 b0->error = ICMP6_ERROR_NONE;
2062 rp0 = vlib_buffer_get_current (b0);
2063 ip0 = (ip6_header_t *)&rp0-> ip;
2064 rh0 = (icmp6_multicast_listener_report_header_t *)&rp0-> report_hdr;
2066 memset (rp0 , 0x0, sizeof (icmp6_multicast_listener_report_packet_t));
2068 ip0->ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2070 ip0->protocol = IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS;
2071 /* for DEBUG - vnet driver won't seem to emit router alerts */
2072 /* ip0->protocol = IP_PROTOCOL_ICMP6; */
2075 rh0->icmp.type = ICMP6_multicast_listener_report_v2;
2077 /* source address MUST be the link-local address */
2078 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2079 ip0->src_address = radv_info->link_local_address;
2081 /* destination is all mldpv2 routers */
2082 ip6_set_reserved_multicast_address(&ip0->dst_address,
2083 IP6_MULTICAST_SCOPE_link_local,
2084 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2086 /* add reports here */
2087 ip6_mldp_group_t *m;
2088 int num_addr_records = 0;
2089 icmp6_multicast_address_record_t rr;
2091 /* fill in the hop-by-hop extension header (router alert) info */
2092 rh0->ext_hdr.next_hdr = IP_PROTOCOL_ICMP6;
2093 rh0->ext_hdr.n_data_u64s = 0;
2095 rh0->alert.type = IP6_MLDP_ALERT_TYPE;
2097 rh0->alert.value = 0;
2102 rh0->icmp.checksum = 0;
2104 pool_foreach (m, radv_info->mldp_group_pool, ({
2107 rr.aux_data_len_u32s = 0;
2108 rr.num_sources = clib_host_to_net_u16 (m->num_sources);
2109 clib_memcpy(&rr.mcast_addr, &m->mcast_address, sizeof(ip6_address_t));
2113 vlib_buffer_add_data (vm,
2114 b0->free_list_index,
2116 (void *)&rr, sizeof(icmp6_multicast_address_record_t));
2118 payload_length += sizeof( icmp6_multicast_address_record_t);
2122 rh0->num_addr_records = clib_host_to_net_u16(num_addr_records);
2124 /* update lengths */
2125 ip0->payload_length = clib_host_to_net_u16 (payload_length);
2127 rh0->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0,
2129 ASSERT(bogus_length == 0);
2132 * OK to override w/ no regard for actual FIB, because
2133 * ip6-rewrite-local only looks at the adjacency.
2135 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
2136 vnet_main.local_interface_sw_if_index;
2138 vnet_buffer (b0)->ip.adj_index[VLIB_RX] =
2139 radv_info->all_mldv2_routers_adj_index;
2141 vlib_node_t * node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite-local");
2143 f = vlib_get_frame_to_node (vm, node->index);
2144 to_next = vlib_frame_vector_args (f);
2148 vlib_put_frame_to_node (vm, node->index, f);
2152 VLIB_REGISTER_NODE (ip6_icmp_router_solicitation_node,static) = {
2153 .function = icmp6_router_solicitation,
2154 .name = "icmp6-router-solicitation",
2156 .vector_size = sizeof (u32),
2158 .format_trace = format_icmp6_input_trace,
2160 .n_next_nodes = ICMP6_ROUTER_SOLICITATION_N_NEXT,
2162 [ICMP6_ROUTER_SOLICITATION_NEXT_DROP] = "error-drop",
2163 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW] = "ip6-rewrite-local",
2164 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX] = "interface-output",
2168 /* send a RA or update the timer info etc.. */
2170 ip6_neighbor_process_timer_event (vlib_main_t * vm,
2171 vlib_node_runtime_t * node,
2172 vlib_frame_t * frame)
2174 vnet_main_t * vnm = vnet_get_main();
2175 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
2176 ip6_radv_t *radv_info;
2177 vlib_frame_t * f = 0;
2178 u32 n_this_frame = 0;
2179 u32 n_left_to_next = 0;
2182 icmp6_router_solicitation_header_t * h0;
2184 f64 now = vlib_time_now (vm);
2186 /* Interface ip6 radv info list */
2187 pool_foreach (radv_info, nm->if_radv_pool, ({
2189 if( !vnet_sw_interface_is_admin_up (vnm, radv_info->sw_if_index))
2191 radv_info->initial_adverts_sent = radv_info->initial_adverts_count-1;
2192 radv_info->next_multicast_time = now;
2193 radv_info->last_multicast_time = now;
2194 radv_info->last_radv_time = 0;
2195 radv_info->all_routers_mcast = 0;
2199 /* Make sure that we've joined the all-routers multicast group */
2200 if(!radv_info->all_routers_mcast)
2202 /* send MDLP_REPORT_EVENT message */
2203 ip6_neighbor_send_mldpv2_report(radv_info->sw_if_index);
2204 radv_info->all_routers_mcast = 1;
2207 /* is it time to send a multicast RA on this interface? */
2208 if(radv_info->send_radv && (now >= radv_info->next_multicast_time))
2213 f64 rfn = (radv_info->max_radv_interval - radv_info->min_radv_interval) *
2214 random_f64 (&radv_info->seed) + radv_info->min_radv_interval;
2216 /* multicast send - compute next multicast send time */
2217 if( radv_info->initial_adverts_sent > 0)
2219 radv_info->initial_adverts_sent--;
2220 if(rfn > radv_info-> initial_adverts_interval)
2221 rfn = radv_info-> initial_adverts_interval;
2223 /* check to see if we are ceasing to send */
2224 if( radv_info->initial_adverts_sent == 0)
2225 if(radv_info->cease_radv)
2226 radv_info->send_radv = 0;
2229 radv_info->next_multicast_time = rfn + now;
2230 radv_info->last_multicast_time = now;
2232 /* send advert now - build a "solicted" router advert with unspecified source address */
2233 n_allocated = vlib_buffer_alloc_from_free_list(vm,
2236 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2238 if (PREDICT_FALSE(n_allocated == 0))
2240 clib_warning ("buffer allocation failure");
2243 b0 = vlib_get_buffer (vm, bo0);
2244 b0->current_length = sizeof( icmp6_router_solicitation_header_t);
2245 b0->error = ICMP6_ERROR_NONE;
2246 vnet_buffer (b0)->sw_if_index[VLIB_RX] = radv_info->sw_if_index;
2248 h0 = vlib_buffer_get_current (b0);
2250 memset (h0, 0, sizeof (icmp6_router_solicitation_header_t));
2252 h0->ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2253 h0->ip.payload_length = clib_host_to_net_u16 (sizeof (icmp6_router_solicitation_header_t)
2254 - STRUCT_OFFSET_OF (icmp6_router_solicitation_header_t, neighbor));
2255 h0->ip.protocol = IP_PROTOCOL_ICMP6;
2256 h0->ip.hop_limit = 255;
2258 /* set src/dst address as "unspecified" this marks this packet as internally generated rather than recieved */
2259 h0->ip.src_address.as_u64[0] = 0;
2260 h0->ip.src_address.as_u64[1] = 0;
2262 h0->ip.dst_address.as_u64[0] = 0;
2263 h0->ip.dst_address.as_u64[1] = 0;
2265 h0->neighbor.icmp.type = ICMP6_router_solicitation;
2267 if (PREDICT_FALSE(f == 0))
2269 f = vlib_get_frame_to_node (vm, ip6_icmp_router_solicitation_node.index);
2270 to_next = vlib_frame_vector_args (f);
2271 n_left_to_next = VLIB_FRAME_SIZE;
2280 if (PREDICT_FALSE(n_left_to_next == 0))
2282 f->n_vectors = n_this_frame;
2283 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2291 ASSERT(n_this_frame);
2292 f->n_vectors = n_this_frame;
2293 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2299 ip6_icmp_neighbor_discovery_event_process (vlib_main_t * vm,
2300 vlib_node_runtime_t * node,
2301 vlib_frame_t * frame)
2304 ip6_icmp_neighbor_discovery_event_data_t * event_data;
2306 /* init code here */
2310 vlib_process_wait_for_event_or_clock (vm, 1. /* seconds */);
2312 event_data = vlib_process_get_event_data (vm, &event_type);
2316 /* No events found: timer expired. */
2317 /* process interface list and send RAs as appropriate, update timer info */
2318 ip6_neighbor_process_timer_event (vm, node, frame);
2322 switch (event_type) {
2324 case ICMP6_ND_EVENT_INIT:
2335 _vec_len (event_data) = 0;
2338 return frame->n_vectors;
2341 VLIB_REGISTER_NODE (ip6_icmp_router_advertisement_node,static) = {
2342 .function = icmp6_router_advertisement,
2343 .name = "icmp6-router-advertisement",
2345 .vector_size = sizeof (u32),
2347 .format_trace = format_icmp6_input_trace,
2355 vlib_node_registration_t ip6_icmp_neighbor_discovery_event_node = {
2357 .function = ip6_icmp_neighbor_discovery_event_process,
2358 .name = "ip6-icmp-neighbor-discovery-event-process",
2359 .type = VLIB_NODE_TYPE_PROCESS,
2363 icmp6_neighbor_solicitation (vlib_main_t * vm,
2364 vlib_node_runtime_t * node,
2365 vlib_frame_t * frame)
2366 { return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame, /* is_solicitation */ 1); }
2369 icmp6_neighbor_advertisement (vlib_main_t * vm,
2370 vlib_node_runtime_t * node,
2371 vlib_frame_t * frame)
2372 { return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame, /* is_solicitation */ 0); }
2374 VLIB_REGISTER_NODE (ip6_icmp_neighbor_solicitation_node,static) = {
2375 .function = icmp6_neighbor_solicitation,
2376 .name = "icmp6-neighbor-solicitation",
2378 .vector_size = sizeof (u32),
2380 .format_trace = format_icmp6_input_trace,
2382 .n_next_nodes = ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
2384 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP] = "error-drop",
2385 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY] = "interface-output",
2389 VLIB_REGISTER_NODE (ip6_icmp_neighbor_advertisement_node,static) = {
2390 .function = icmp6_neighbor_advertisement,
2391 .name = "icmp6-neighbor-advertisement",
2393 .vector_size = sizeof (u32),
2395 .format_trace = format_icmp6_input_trace,
2403 /* API support functions */
2405 ip6_neighbor_ra_config(vlib_main_t * vm, u32 sw_if_index,
2406 u8 suppress, u8 managed, u8 other,
2407 u8 ll_option, u8 send_unicast, u8 cease,
2408 u8 use_lifetime, u32 lifetime,
2409 u32 initial_count, u32 initial_interval,
2410 u32 max_interval, u32 min_interval,
2413 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
2417 /* look up the radv_t information for this interface */
2418 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
2419 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2420 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
2425 ip6_radv_t * radv_info;
2426 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2428 if((max_interval != 0) && (min_interval ==0))
2429 min_interval = .75 * max_interval;
2431 max_interval = (max_interval != 0) ? ( (is_no) ? DEF_MAX_RADV_INTERVAL : max_interval) : radv_info->max_radv_interval;
2432 min_interval = (min_interval != 0) ? ( (is_no) ? DEF_MIN_RADV_INTERVAL : min_interval) : radv_info->min_radv_interval;
2433 lifetime = (use_lifetime != 0) ? ( (is_no) ? DEF_DEF_RTR_LIFETIME : lifetime) : radv_info->adv_router_lifetime_in_sec;
2437 if(lifetime > MAX_DEF_RTR_LIFETIME)
2438 lifetime = MAX_DEF_RTR_LIFETIME;
2440 if(lifetime <= max_interval)
2441 return VNET_API_ERROR_INVALID_VALUE;
2444 if(min_interval != 0)
2446 if((min_interval > .75 * max_interval) ||
2448 return VNET_API_ERROR_INVALID_VALUE;
2451 if((initial_count > MAX_INITIAL_RTR_ADVERTISEMENTS) ||
2452 (initial_interval > MAX_INITIAL_RTR_ADVERT_INTERVAL))
2453 return VNET_API_ERROR_INVALID_VALUE;
2456 if "flag" is set and is_no is true then restore default value else set value corresponding to "flag"
2457 if "flag" is clear don't change corresponding value
2459 radv_info->send_radv = (suppress != 0) ? ( (is_no != 0) ? 1 : 0 ) : radv_info->send_radv;
2460 radv_info->adv_managed_flag = ( managed != 0) ? ( (is_no) ? 0 : 1) : radv_info->adv_managed_flag;
2461 radv_info->adv_other_flag = (other != 0) ? ( (is_no) ? 0: 1) : radv_info->adv_other_flag;
2462 radv_info->adv_link_layer_address = ( ll_option != 0) ? ( (is_no) ? 1 : 0) : radv_info->adv_link_layer_address;
2463 radv_info->send_unicast = (send_unicast != 0) ? ( (is_no) ? 0 : 1) : radv_info->send_unicast;
2464 radv_info->cease_radv = ( cease != 0) ? ( (is_no) ? 0 : 1) : radv_info->cease_radv;
2466 radv_info->min_radv_interval = min_interval;
2467 radv_info->max_radv_interval = max_interval;
2468 radv_info->adv_router_lifetime_in_sec = lifetime;
2470 radv_info->initial_adverts_count =
2471 (initial_count != 0) ? ( (is_no) ? MAX_INITIAL_RTR_ADVERTISEMENTS : initial_count) : radv_info->initial_adverts_count ;
2472 radv_info->initial_adverts_interval =
2473 (initial_interval != 0) ? ( (is_no) ? MAX_INITIAL_RTR_ADVERT_INTERVAL : initial_interval) : radv_info->initial_adverts_interval;
2476 if((cease != 0) && (is_no))
2477 radv_info-> send_radv = 1;
2479 radv_info->initial_adverts_sent = radv_info->initial_adverts_count -1;
2480 radv_info->next_multicast_time = vlib_time_now (vm);
2481 radv_info->last_multicast_time = vlib_time_now (vm);
2482 radv_info->last_radv_time = 0;
2488 ip6_neighbor_ra_prefix(vlib_main_t * vm, u32 sw_if_index,
2489 ip6_address_t *prefix_addr, u8 prefix_len,
2490 u8 use_default, u32 val_lifetime, u32 pref_lifetime,
2491 u8 no_advertise, u8 off_link, u8 no_autoconfig, u8 no_onlink,
2494 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
2499 /* look up the radv_t information for this interface */
2500 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
2502 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2504 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
2508 f64 now = vlib_time_now (vm);
2509 ip6_radv_t * radv_info;
2510 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2512 /* prefix info add, delete or update */
2513 ip6_radv_prefix_t * prefix;
2515 /* lookup prefix info for this address on this interface */
2516 uword * p = mhash_get (&radv_info->address_to_prefix_index, prefix_addr);
2518 prefix = p ? pool_elt_at_index (radv_info->adv_prefixes_pool, p[0]) : 0;
2524 return VNET_API_ERROR_INVALID_VALUE; /* invalid prefix */
2526 if(prefix->prefix_len != prefix_len)
2527 return VNET_API_ERROR_INVALID_VALUE_2;
2529 /* FIXME - Should the DP do this or the CP ?*/
2530 /* do specific delete processing here before returning */
2531 /* try to remove from routing table */
2533 mhash_unset (&radv_info->address_to_prefix_index, prefix_addr,/* old_value */ 0);
2534 pool_put (radv_info->adv_prefixes_pool, prefix);
2536 radv_info->initial_adverts_sent = radv_info->initial_adverts_count -1;
2537 radv_info->next_multicast_time = vlib_time_now (vm);
2538 radv_info->last_multicast_time = vlib_time_now (vm);
2539 radv_info->last_radv_time = 0;
2543 /* adding or changing */
2548 pool_get (radv_info->adv_prefixes_pool, prefix);
2549 pi = prefix - radv_info->adv_prefixes_pool;
2550 mhash_set (&radv_info->address_to_prefix_index, prefix_addr, pi, /* old_value */ 0);
2552 memset(prefix, 0x0, sizeof(ip6_radv_prefix_t));
2554 prefix->prefix_len = prefix_len;
2555 clib_memcpy(&prefix->prefix, prefix_addr, sizeof(ip6_address_t));
2557 /* initialize default values */
2558 prefix->adv_on_link_flag = 1; /* L bit set */
2559 prefix->adv_autonomous_flag = 1; /* A bit set */
2560 prefix->adv_valid_lifetime_in_secs = DEF_ADV_VALID_LIFETIME;
2561 prefix->adv_pref_lifetime_in_secs = DEF_ADV_PREF_LIFETIME;
2562 prefix->enabled = 1;
2563 prefix->decrement_lifetime_flag = 1;
2564 prefix->deprecated_prefix_flag = 1;
2568 /* FIXME - Should the DP do this or the CP ?*/
2569 /* insert prefix into routing table as a connected prefix */
2578 if(prefix->prefix_len != prefix_len)
2579 return VNET_API_ERROR_INVALID_VALUE_2;
2583 /* FIXME - Should the DP do this or the CP ?*/
2584 /* remove from routing table if already there */
2588 if((val_lifetime == ~0) || (pref_lifetime == ~0))
2590 prefix->adv_valid_lifetime_in_secs = ~0;
2591 prefix->adv_pref_lifetime_in_secs = ~0;
2592 prefix->decrement_lifetime_flag = 0;
2596 prefix->adv_valid_lifetime_in_secs = val_lifetime;;
2597 prefix->adv_pref_lifetime_in_secs = pref_lifetime;
2600 /* copy remaining */
2601 prefix->enabled = !(no_advertise != 0);
2602 prefix->adv_on_link_flag = !((off_link != 0) || (no_onlink != 0));
2603 prefix->adv_autonomous_flag = !(no_autoconfig != 0);
2607 /* fill in the expiration times */
2608 prefix->valid_lifetime_expires = now + prefix->adv_valid_lifetime_in_secs;
2609 prefix->pref_lifetime_expires = now + prefix->adv_pref_lifetime_in_secs;
2611 radv_info->initial_adverts_sent = radv_info->initial_adverts_count -1;
2612 radv_info->next_multicast_time = vlib_time_now (vm);
2613 radv_info->last_multicast_time = vlib_time_now (vm);
2614 radv_info->last_radv_time = 0;
2620 ip6_neighbor_cmd(vlib_main_t * vm, unformat_input_t * main_input, vlib_cli_command_t * cmd)
2622 vnet_main_t * vnm = vnet_get_main();
2623 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
2624 clib_error_t * error = 0;
2626 u8 suppress = 0, managed = 0, other = 0;
2627 u8 suppress_ll_option = 0, send_unicast = 0, cease= 0;
2628 u8 use_lifetime = 0;
2629 u32 sw_if_index, ra_lifetime = 0, ra_initial_count = 0, ra_initial_interval = 0;
2630 u32 ra_max_interval = 0 , ra_min_interval = 0;
2632 unformat_input_t _line_input, * line_input = &_line_input;
2633 vnet_sw_interface_t * sw_if0;
2635 int add_radv_info = 1;
2636 __attribute__((unused)) ip6_radv_t * radv_info = 0;
2637 ip6_address_t ip6_addr;
2641 /* Get a line of input. */
2642 if (! unformat_user (main_input, unformat_line_input, line_input))
2645 /* get basic radv info for this interface */
2646 if(unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2649 if (unformat_user (line_input,
2650 unformat_vnet_sw_interface, vnm, &sw_if_index))
2653 ethernet_interface_t * eth_if0 = 0;
2655 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2656 if(sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2657 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2661 error = clib_error_return (0, "Interface must be of ethernet type");
2665 /* look up the radv_t information for this interface */
2666 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
2668 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2672 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2676 error = clib_error_return (0, "unknown interface %U'",
2677 format_unformat_error, line_input);
2683 error = clib_error_return (0, "invalid interface name %U'",
2684 format_unformat_error, line_input);
2689 /* get the rest of the command */
2690 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2692 if (unformat (line_input, "no"))
2694 else if(unformat (line_input, "prefix %U/%d",
2695 unformat_ip6_address, &ip6_addr,
2701 else if (unformat (line_input, "ra-managed-config-flag"))
2706 else if (unformat (line_input, "ra-other-config-flag"))
2711 else if (unformat (line_input, "ra-suppress") ||
2712 unformat (line_input, "ra-surpress"))
2717 else if (unformat (line_input, "ra-suppress-link-layer") ||
2718 unformat (line_input, "ra-surpress-link-layer"))
2720 suppress_ll_option = 1;
2723 else if (unformat (line_input, "ra-send-unicast"))
2728 else if (unformat (line_input, "ra-lifetime"))
2730 if (!unformat (line_input, "%d", &ra_lifetime))
2731 return(error = unformat_parse_error (line_input));
2735 else if (unformat (line_input, "ra-initial"))
2737 if (!unformat (line_input, "%d %d", &ra_initial_count, &ra_initial_interval))
2738 return(error = unformat_parse_error (line_input));
2741 else if (unformat (line_input, "ra-interval"))
2743 if (!unformat (line_input, "%d", &ra_max_interval))
2744 return(error = unformat_parse_error (line_input));
2746 if (!unformat (line_input, "%d", &ra_min_interval))
2747 ra_min_interval = 0;
2750 else if(unformat (line_input, "ra-cease"))
2756 return(unformat_parse_error (line_input));
2761 ip6_neighbor_ra_config(vm, sw_if_index,
2762 suppress, managed, other,
2763 suppress_ll_option, send_unicast, cease,
2764 use_lifetime, ra_lifetime,
2765 ra_initial_count, ra_initial_interval,
2766 ra_max_interval, ra_min_interval,
2771 u32 valid_lifetime_in_secs = 0;
2772 u32 pref_lifetime_in_secs = 0;
2773 u8 use_prefix_default_values = 0;
2774 u8 no_advertise = 0;
2776 u8 no_autoconfig = 0;
2779 /* get the rest of the command */
2780 while(unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2782 if(unformat (line_input, "default"))
2784 use_prefix_default_values = 1;
2787 else if(unformat (line_input, "infinite"))
2789 valid_lifetime_in_secs = ~0;
2790 pref_lifetime_in_secs = ~0;
2793 else if(unformat (line_input, "%d %d", &valid_lifetime_in_secs,
2794 &pref_lifetime_in_secs))
2801 /* get the rest of the command */
2802 while (!use_prefix_default_values &&
2803 unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2805 if(unformat (line_input, "no-advertise"))
2807 else if(unformat (line_input, "off-link"))
2809 else if(unformat (line_input, "no-autoconfig"))
2811 else if(unformat (line_input, "no-onlink"))
2814 return(unformat_parse_error (line_input));
2817 ip6_neighbor_ra_prefix(vm, sw_if_index,
2818 &ip6_addr, addr_len,
2819 use_prefix_default_values,
2820 valid_lifetime_in_secs,
2821 pref_lifetime_in_secs,
2829 unformat_free (line_input);
2836 ip6_print_addrs(vlib_main_t * vm,
2839 ip_lookup_main_t * lm = &ip6_main.lookup_main;
2842 for (i = 0; i < vec_len (addrs); i++)
2844 ip_interface_address_t * a = pool_elt_at_index(lm->if_address_pool, addrs[i]);
2845 ip6_address_t * address = ip_interface_address_get_address (lm, a);
2847 vlib_cli_output (vm, "\t\t%U/%d",
2848 format_ip6_address, address,
2853 static clib_error_t *
2854 show_ip6_interface_cmd (vlib_main_t * vm,
2855 unformat_input_t * input,
2856 vlib_cli_command_t * cmd)
2858 vnet_main_t * vnm = vnet_get_main();
2859 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
2860 clib_error_t * error = 0;
2865 if (unformat_user (input,
2866 unformat_vnet_sw_interface, vnm, &sw_if_index))
2870 /* look up the radv_t information for this interface */
2871 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
2873 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2877 ip_lookup_main_t * lm = &ip6_main.lookup_main;
2878 ip6_radv_t * radv_info;
2879 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2881 vlib_cli_output (vm, "%U is admin %s\n", format_vnet_sw_interface_name, vnm,
2882 vnet_get_sw_interface (vnm, sw_if_index),
2883 (vnet_sw_interface_is_admin_up (vnm, sw_if_index) ? "up" : "down"));
2886 u32 *link_scope = 0, *global_scope = 0;
2887 u32 *local_scope = 0, *unknown_scope = 0;
2888 ip_interface_address_t * a;
2890 vec_validate_init_empty (lm->if_address_pool_index_by_sw_if_index, sw_if_index, ~0);
2891 ai = lm->if_address_pool_index_by_sw_if_index[sw_if_index];
2893 while (ai != (u32)~0)
2895 a = pool_elt_at_index(lm->if_address_pool, ai);
2896 ip6_address_t * address = ip_interface_address_get_address (lm, a);
2898 if (ip6_address_is_link_local_unicast (address))
2899 vec_add1 (link_scope, ai);
2900 else if(ip6_address_is_global_unicast (address))
2901 vec_add1 (global_scope, ai);
2902 else if(ip6_address_is_local_unicast (address))
2903 vec_add1 (local_scope, ai);
2905 vec_add1 (unknown_scope, ai);
2907 ai = a->next_this_sw_interface;
2910 if (vec_len (link_scope))
2912 vlib_cli_output (vm, "\tLink-local address(es):\n");
2913 ip6_print_addrs (vm, link_scope);
2914 vec_free (link_scope);
2917 if (vec_len (local_scope))
2919 vlib_cli_output (vm, "\tLocal unicast address(es):\n");
2920 ip6_print_addrs (vm, local_scope);
2921 vec_free (local_scope);
2924 if (vec_len (global_scope))
2926 vlib_cli_output (vm, "\tGlobal unicast address(es):\n");
2927 ip6_print_addrs (vm, global_scope);
2928 vec_free (global_scope);
2931 if (vec_len (unknown_scope))
2933 vlib_cli_output (vm, "\tOther-scope address(es):\n");
2934 ip6_print_addrs (vm, unknown_scope);
2935 vec_free (unknown_scope);
2938 vlib_cli_output (vm, "\tJoined group address(es):\n");
2939 ip6_mldp_group_t *m;
2940 pool_foreach (m, radv_info->mldp_group_pool, ({
2941 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address, &m->mcast_address);
2944 vlib_cli_output (vm, "\tAdvertised Prefixes:\n");
2945 ip6_radv_prefix_t * p;
2946 pool_foreach (p, radv_info->adv_prefixes_pool, ({
2947 vlib_cli_output (vm, "\t\tprefix %U, length %d\n",
2948 format_ip6_address, &p->prefix, p->prefix_len);
2951 vlib_cli_output (vm, "\tMTU is %d\n", radv_info->adv_link_mtu);
2952 vlib_cli_output (vm, "\tICMP error messages are unlimited\n");
2953 vlib_cli_output (vm, "\tICMP redirects are disabled\n");
2954 vlib_cli_output (vm, "\tICMP unreachables are not sent\n");
2955 vlib_cli_output (vm, "\tND DAD is disabled\n");
2956 //vlib_cli_output (vm, "\tND reachable time is %d milliseconds\n",);
2957 vlib_cli_output (vm, "\tND advertised reachable time is %d\n",
2958 radv_info->adv_neighbor_reachable_time_in_msec);
2959 vlib_cli_output (vm, "\tND advertised retransmit interval is %d (msec)\n",
2960 radv_info->adv_time_in_msec_between_retransmitted_neighbor_solicitations);
2962 u32 ra_interval = radv_info->max_radv_interval;
2963 u32 ra_interval_min = radv_info->min_radv_interval;
2964 vlib_cli_output (vm, "\tND router advertisements are sent every %d seconds (min interval is %d)\n",
2965 ra_interval, ra_interval_min);
2966 vlib_cli_output (vm, "\tND router advertisements live for %d seconds\n",
2967 radv_info->adv_router_lifetime_in_sec);
2968 vlib_cli_output (vm, "\tHosts %s stateless autoconfig for addresses\n",
2969 (radv_info->adv_managed_flag) ? "use" :" don't use");
2970 vlib_cli_output (vm, "\tND router advertisements sent %d\n", radv_info->n_advertisements_sent);
2971 vlib_cli_output (vm, "\tND router solicitations received %d\n", radv_info->n_solicitations_rcvd);
2972 vlib_cli_output (vm, "\tND router solicitations dropped %d\n", radv_info->n_solicitations_dropped);
2976 error = clib_error_return (0, "IPv6 not enabled on interface",
2977 format_unformat_error, input);
2985 * This command is used to display various IPv6 attributes on a given
2989 * Example of how to display IPv6 settings:
2990 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
2991 * GigabitEthernet2/0/0 is admin up
2992 * Link-local address(es):
2994 * Joined group address(es):
2999 * Advertised Prefixes:
3000 * prefix fe80::fe:28ff:fe9c:75b3, length 64
3002 * ICMP error messages are unlimited
3003 * ICMP redirects are disabled
3004 * ICMP unreachables are not sent
3005 * ND DAD is disabled
3006 * ND advertised reachable time is 0
3007 * ND advertised retransmit interval is 0 (msec)
3008 * ND router advertisements are sent every 200 seconds (min interval is 150)
3009 * ND router advertisements live for 600 seconds
3010 * Hosts use stateless autoconfig for addresses
3011 * ND router advertisements sent 19336
3012 * ND router solicitations received 0
3013 * ND router solicitations dropped 0
3015 * Example of output if IPv6 is not enabled on the interface:
3016 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
3017 * show ip6 interface: IPv6 not enabled on interface
3021 VLIB_CLI_COMMAND (show_ip6_interface_command, static) = {
3022 .path = "show ip6 interface",
3023 .function = show_ip6_interface_cmd,
3024 .short_help = "show ip6 interface <interface>",
3029 disable_ip6_interface(vlib_main_t * vm,
3032 clib_error_t * error = 0;
3033 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3036 /* look up the radv_t information for this interface */
3037 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
3038 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3040 /* if not created - do nothing */
3043 vnet_main_t * vnm = vnet_get_main();
3044 ip6_radv_t * radv_info;
3046 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3048 /* check radv_info ref count for other ip6 addresses on this interface */
3049 if(radv_info->ref_count == 0 )
3051 /* essentially "disables" ipv6 on this interface */
3052 error = ip6_add_del_interface_address (vm, sw_if_index,
3053 &radv_info->link_local_address,
3054 radv_info->link_local_prefix_len,
3057 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, 0/* is_add */);
3064 ip6_interface_enabled(vlib_main_t * vm,
3067 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3070 /* look up the radv_t information for this interface */
3071 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
3073 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3079 enable_ip6_interface(vlib_main_t * vm,
3082 clib_error_t * error = 0;
3083 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3087 /* look up the radv_t information for this interface */
3088 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
3090 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3092 /* if not created yet */
3095 vnet_main_t * vnm = vnet_get_main();
3096 vnet_sw_interface_t * sw_if0;
3098 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
3099 if(sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
3101 ethernet_interface_t * eth_if0;
3103 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
3106 /* create radv_info. for this interface. This holds all the info needed for router adverts */
3107 ri = ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, is_add);
3111 ip6_radv_t * radv_info;
3112 ip6_address_t link_local_address;
3114 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3116 ip6_link_local_address_from_ethernet_mac_address (&link_local_address,
3119 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index);
3120 if(sw_if0->type == VNET_SW_INTERFACE_TYPE_SUB)
3122 /* make up an interface id */
3126 link_local_address.as_u64[0] = radv_info->randomizer;
3129 md5_add (&m, &link_local_address, 16);
3130 md5_finish (&m, digest);
3132 clib_memcpy(&link_local_address, digest, 16);
3134 radv_info->randomizer = link_local_address.as_u64[0];
3136 link_local_address.as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
3138 link_local_address.as_u8[8] &= 0xfd;
3141 /* essentially "enables" ipv6 on this interface */
3142 error = ip6_add_del_interface_address (vm, sw_if_index,
3143 &link_local_address,
3144 128 /* address width */,
3148 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, !is_add);
3151 radv_info->link_local_address = link_local_address;
3152 radv_info->link_local_prefix_len = 64;
3161 static clib_error_t *
3162 enable_ip6_interface_cmd (vlib_main_t * vm,
3163 unformat_input_t * input,
3164 vlib_cli_command_t * cmd)
3166 vnet_main_t * vnm = vnet_get_main();
3167 clib_error_t * error = 0;
3172 if (unformat_user (input,
3173 unformat_vnet_sw_interface, vnm, &sw_if_index))
3175 enable_ip6_interface(vm, sw_if_index);
3179 error = clib_error_return (0, "unknown interface\n'",
3180 format_unformat_error, input);
3187 * This command is used to enable IPv6 on a given interface.
3190 * Example of how enable IPv6 on a given interface:
3191 * @cliexcmd{enable ip6 interface GigabitEthernet2/0/0}
3194 VLIB_CLI_COMMAND (enable_ip6_interface_command, static) = {
3195 .path = "enable ip6 interface",
3196 .function = enable_ip6_interface_cmd,
3197 .short_help = "enable ip6 interface <interface>",
3201 static clib_error_t *
3202 disable_ip6_interface_cmd (vlib_main_t * vm,
3203 unformat_input_t * input,
3204 vlib_cli_command_t * cmd)
3206 vnet_main_t * vnm = vnet_get_main();
3207 clib_error_t * error = 0;
3212 if (unformat_user (input,
3213 unformat_vnet_sw_interface, vnm, &sw_if_index))
3215 error = disable_ip6_interface(vm, sw_if_index);
3219 error = clib_error_return (0, "unknown interface\n'",
3220 format_unformat_error, input);
3227 * This command is used to disable IPv6 on a given interface.
3230 * Example of how disable IPv6 on a given interface:
3231 * @cliexcmd{disable ip6 interface GigabitEthernet2/0/0}
3234 VLIB_CLI_COMMAND (disable_ip6_interface_command, static) = {
3235 .path = "disable ip6 interface",
3236 .function = disable_ip6_interface_cmd,
3237 .short_help = "disable ip6 interface <interface>",
3242 * This command is used to configure the neighbor discovery
3243 * parameters on a given interface. Use the '<em>show ip6 interface</em>'
3244 * command to display some of the current neighbor discovery parameters
3245 * on a given interface. This command has three formats:
3248 * <b>Format 1 - Router Advertisement Options:</b> (Only one can be entered in a single command)
3250 * '<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>'
3254 * <em>[no] ra-managed-config-flag</em> - Advertises in ICMPv6
3255 * router-advertisement messages to use stateful address
3256 * auto-configuration to obtain address information (sets the M-bit).
3257 * Default is the M-bit is not set and the '<em>no</em>' option
3258 * returns it to this default state.
3260 * <em>[no] ra-other-config-flag</em> - Indicates in ICMPv6
3261 * router-advertisement messages that hosts use stateful auto
3262 * configuration to obtain nonaddress related information (sets
3263 * the O-bit). Default is the O-bit is not set and the '<em>no</em>'
3264 * option returns it to this default state.
3266 * <em>[no] ra-suppress</em> - Disables sending ICMPv6 router-advertisement
3267 * messages. The '<em>no</em>' option implies to enable sending ICMPv6
3268 * router-advertisement messages.
3270 * <em>[no] ra-suppress-link-layer</em> - Indicates not to include the
3271 * optional source link-layer address in the ICMPv6 router-advertisement
3272 * messages. Default is to include the optional source link-layer address
3273 * and the '<em>no</em>' option returns it to this default state.
3275 * <em>[no] ra-send-unicast</em> - Use the source address of the
3276 * router-solicitation message if availiable. The default is to use
3277 * multicast address of all nodes, and the '<em>no</em>' option returns
3278 * it to this default state.
3280 * <em>[no] ra-lifetime <lifetime></em> - Advertises the lifetime of a
3281 * default router in ICMPv6 router-advertisement messages. The range is
3282 * from 0 to 9000 seconds. '<em><lifetime></em>' must be greater than
3283 * '<em><max-interval></em>'. The default value is 600 seconds and the
3284 * '<em>no</em>' option returns it to this default value.
3286 * <em>[no] ra-initial <cnt> <interval></em> - Number of initial ICMPv6
3287 * router-advertisement messages sent and the interval between each
3288 * message. Range for count is 1 - 3 and default is 3. Range for interval
3289 * is 1 to 16 seconds, and default is 16 seconds. The '<em>no</em>' option
3290 * returns both to their default value.
3292 * <em>[no] ra-interval <max-interval> [<min-interval>]</em> - Configures the
3293 * interval between sending ICMPv6 router-advertisement messages. The
3294 * range for max-interval is from 4 to 200 seconds. min-interval can not
3295 * be more than 75% of max-interval. If not set, min-interval will be
3296 * set to 75% of max-interval. The range for min-interval is from 3 to
3297 * 150 seconds. The '<em>no</em>' option returns both to their default
3300 * <em>[no] ra-cease</em> - Cease sending ICMPv6 router-advertisement messages.
3301 * The '<em>no</em>' options implies to start (or restart) sending
3302 * ICMPv6 router-advertisement messages.
3305 * <b>Format 2 - Prefix Options:</b>
3307 * '<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>'
3311 * <em>no</em> - All additional flags are ignored and the prefix is deleted.
3313 * <em><valid-lifetime> <pref-lifetime></em> - '<em><valid-lifetime></em>' is the
3314 * length of time in seconds during what the prefix is valid for the purpose of
3315 * on-link determination. Range is 7203 to 2592000 seconds and default is 2592000
3316 * seconds (30 days). '<em><pref-lifetime></em>' is the prefered-lifetime and is the
3317 * length of time in seconds during what addresses generated from the prefix remain
3318 * preferred. Range is 0 to 604800 seconds and default is 604800 seconds (7 days).
3320 * <em>infinite</em> - Both '<em><valid-lifetime></em>' and '<em><<pref-lifetime></em>'
3321 * are inifinte, no timeout.
3323 * <em>no-advertise</em> - Do not send full router address in prefix
3324 * advertisement. Default is to advertise (i.e. - This flag is off by default).
3326 * <em>off-link</em> - Prefix is off-link, clear L-bit in packet. Default is on-link
3327 * (i.e. - This flag is off and L-bit in packet is set by default and this prefix can
3328 * be used for on-link determination). '<em>no-onlink</em>' also controls the L-bit.
3330 * <em>no-autoconfig</em> - Do not use prefix for autoconfiguration, clear A-bit in packet.
3331 * Default is autoconfig (i.e. - This flag is off and A-bit in packet is set by default.
3333 * <em>no-onlink</em> - Do not use prefix for onlink determination, clear L-bit in packet.
3334 * Default is on-link (i.e. - This flag is off and L-bit in packet is set by default and
3335 * this prefix can be used for on-link determination). '<em>off-link</em>' also controls
3339 * <b>Format 3: - Default of Prefix:</b>
3341 * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> default</b></em>'
3343 * When a new prefix is added (or existing one is being overwritten) <em>default</em>
3344 * uses default values for the prefix. If <em>no</em> is used, the <em>default</em>
3345 * is ignored and the prefix is deleted.
3349 * Example of how set a router advertisement option:
3350 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 ra-interval 100 20}
3351 * Example of how to add a prefix:
3352 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 prefix fe80::fe:28ff:fe9c:75b3/64 infinite no-advertise}
3353 * Example of how to delete a prefix:
3354 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 no prefix fe80::fe:28ff:fe9c:75b3/64}
3357 VLIB_CLI_COMMAND (ip6_nd_command, static) = {
3359 .short_help = "ip6 nd <interface> ...",
3360 .function = ip6_neighbor_cmd,
3365 set_ip6_link_local_address(vlib_main_t * vm,
3367 ip6_address_t *address,
3370 clib_error_t * error = 0;
3371 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3373 ip6_radv_t * radv_info;
3374 vnet_main_t * vnm = vnet_get_main();
3376 if( !ip6_address_is_link_local_unicast (address))
3378 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_LINK_LOCAL;
3379 return(error = clib_error_return (0, "address not link-local",
3380 format_unformat_error));
3383 /* call enable ipv6 */
3384 enable_ip6_interface(vm, sw_if_index);
3386 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3390 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3392 /* save if link local address (overwrite default) */
3394 /* delete the old one */
3395 error = ip6_add_del_interface_address (vm, sw_if_index,
3396 &radv_info->link_local_address,
3397 radv_info->link_local_prefix_len /* address width */,
3402 /* add the new one */
3403 error = ip6_add_del_interface_address (vm, sw_if_index,
3405 address_length /* address width */,
3410 radv_info->link_local_address = *address;
3411 radv_info->link_local_prefix_len = address_length;
3417 vnm->api_errno = VNET_API_ERROR_IP6_NOT_ENABLED;
3418 error = clib_error_return (0, "ip6 not enabled for interface",
3419 format_unformat_error);
3425 set_ip6_link_local_address_cmd (vlib_main_t * vm,
3426 unformat_input_t * input,
3427 vlib_cli_command_t * cmd)
3429 vnet_main_t * vnm = vnet_get_main();
3430 clib_error_t * error = 0;
3432 ip6_address_t ip6_addr;
3435 if (unformat_user (input,
3436 unformat_vnet_sw_interface, vnm, &sw_if_index))
3438 /* get the rest of the command */
3439 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3441 if(unformat (input, "%U/%d",
3442 unformat_ip6_address, &ip6_addr,
3446 return(unformat_parse_error (input));
3449 error = set_ip6_link_local_address(vm,
3457 * This command is used to assign an IPv6 Link-local address to an
3458 * interface. This command will enable IPv6 on an interface if it
3459 * is not already enabled. Use the '<em>show ip6 interface</em>' command
3460 * to display the assigned Link-local address.
3463 * Example of how to assign an IPv6 Link-local address to an interface:
3464 * @cliexcmd{set ip6 link-local address GigabitEthernet2/0/0 FE80::AB8/64}
3467 VLIB_CLI_COMMAND (set_ip6_link_local_address_command, static) = {
3468 .path = "set ip6 link-local address",
3469 .short_help = "set ip6 link-local address <interface> <ip6-address>/<width>",
3470 .function = set_ip6_link_local_address_cmd,
3474 /* callback when an interface address is added or deleted */
3476 ip6_neighbor_add_del_interface_address (ip6_main_t * im,
3479 ip6_address_t * address,
3481 u32 if_address_index,
3484 vnet_main_t * vnm = vnet_get_main();
3485 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3487 vlib_main_t * vm = vnm->vlib_main;
3488 ip6_radv_t * radv_info;
3490 ip6_mldp_group_t *mcast_group_info;
3492 /* create solicited node multicast address for this interface adddress */
3493 ip6_set_solicited_node_multicast_address (&a, 0);
3495 a.as_u8[0xd] = address->as_u8[0xd];
3496 a.as_u8[0xe] = address->as_u8[0xe];
3497 a.as_u8[0xf] = address->as_u8[0xf];
3501 /* try to create radv_info - does nothing if ipv6 already enabled */
3502 enable_ip6_interface(vm, sw_if_index);
3504 /* look up the radv_t information for this interface */
3505 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
3506 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3510 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3513 if( !ip6_address_is_link_local_unicast (address))
3514 radv_info->ref_count++;
3516 /* lookup prefix info for this address on this interface */
3517 uword * p = mhash_get (&radv_info->address_to_mldp_index, &a);
3518 mcast_group_info = p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
3520 /* add -solicted node multicast address */
3521 if(!mcast_group_info)
3525 pool_get (radv_info->mldp_group_pool, mcast_group_info);
3527 mi = mcast_group_info - radv_info->mldp_group_pool;
3528 mhash_set (&radv_info->address_to_mldp_index, &a, mi, /* old_value */ 0);
3530 mcast_group_info->type = 4;
3531 mcast_group_info->mcast_source_address_pool = 0;
3532 mcast_group_info->num_sources = 0;
3533 clib_memcpy(&mcast_group_info->mcast_address, &a, sizeof(ip6_address_t));
3541 /* look up the radv_t information for this interface */
3542 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, ~0);
3543 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3547 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3549 /* lookup prefix info for this address on this interface */
3550 uword * p = mhash_get (&radv_info->address_to_mldp_index, &a);
3551 mcast_group_info = p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
3553 if(mcast_group_info)
3555 mhash_unset (&radv_info->address_to_mldp_index, &a,/* old_value */ 0);
3556 pool_put (radv_info->mldp_group_pool, mcast_group_info);
3559 /* if interface up send MLDP "report" */
3560 radv_info->all_routers_mcast = 0;
3563 if( !ip6_address_is_link_local_unicast (address))
3564 radv_info->ref_count--;
3569 clib_error_t *ip6_set_neighbor_limit (u32 neighbor_limit)
3571 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3573 nm->limit_neighbor_cache_size = neighbor_limit;
3577 static clib_error_t * ip6_neighbor_init (vlib_main_t * vm)
3579 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3580 ip6_main_t * im = &ip6_main;
3582 mhash_init (&nm->neighbor_index_by_key,
3583 /* value size */ sizeof (uword),
3584 /* key size */ sizeof (ip6_neighbor_key_t));
3586 icmp6_register_type (vm, ICMP6_neighbor_solicitation, ip6_icmp_neighbor_solicitation_node.index);
3587 icmp6_register_type (vm, ICMP6_neighbor_advertisement, ip6_icmp_neighbor_advertisement_node.index);
3588 icmp6_register_type (vm, ICMP6_router_solicitation, ip6_icmp_router_solicitation_node.index);
3589 icmp6_register_type (vm, ICMP6_router_advertisement, ip6_icmp_router_advertisement_node.index);
3591 /* handler node for ip6 neighbor discovery events and timers */
3592 vlib_register_node (vm, &ip6_icmp_neighbor_discovery_event_node);
3594 /* add call backs */
3595 ip6_add_del_interface_address_callback_t cb;
3596 memset(&cb, 0x0, sizeof(ip6_add_del_interface_address_callback_t));
3598 /* when an interface address changes... */
3599 cb.function = ip6_neighbor_add_del_interface_address;
3600 cb.function_opaque = 0;
3601 vec_add1 (im->add_del_interface_address_callbacks, cb);
3603 mhash_init (&nm->pending_resolutions_by_address,
3604 /* value size */ sizeof (uword),
3605 /* key size */ sizeof (ip6_address_t));
3607 mhash_init (&nm->mac_changes_by_address,
3608 /* value size */ sizeof (uword),
3609 /* key size */ sizeof (ip6_address_t));
3611 /* default, configurable */
3612 nm->limit_neighbor_cache_size = 50000;
3615 /* $$$$ Hack fix for today */
3616 vec_validate_init_empty
3617 (im->discover_neighbor_next_index_by_hw_if_index, 32, 0 /* drop */);
3623 VLIB_INIT_FUNCTION (ip6_neighbor_init);
3626 void vnet_register_ip6_neighbor_resolution_event (vnet_main_t * vnm,
3632 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3633 ip6_address_t * address = address_arg;
3635 pending_resolution_t * pr;
3637 pool_get (nm->pending_resolutions, pr);
3639 pr->next_index = ~0;
3640 pr->node_index = node_index;
3641 pr->type_opaque = type_opaque;
3644 p = mhash_get (&nm->pending_resolutions_by_address, address);
3647 /* Insert new resolution at the head of the list */
3648 pr->next_index = p[0];
3649 mhash_unset (&nm->pending_resolutions_by_address, address, 0);
3652 mhash_set (&nm->pending_resolutions_by_address, address,
3653 pr - nm->pending_resolutions, 0 /* old value */);
3656 int vnet_add_del_ip6_nd_change_event (vnet_main_t * vnm,
3657 void * data_callback,
3665 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3666 ip6_address_t * address = address_arg;
3668 pending_resolution_t * mc;
3669 void (*fp)(u32, u8 *) = data_callback;
3673 pool_get (nm->mac_changes, mc);
3675 mc->next_index = ~0;
3676 mc->node_index = node_index;
3677 mc->type_opaque = type_opaque;
3679 mc->data_callback = data_callback;
3682 p = mhash_get (&nm->mac_changes_by_address, address);
3685 /* Insert new resolution at the head of the list */
3686 mc->next_index = p[0];
3687 mhash_unset (&nm->mac_changes_by_address, address, 0);
3690 mhash_set (&nm->mac_changes_by_address, address,
3691 mc - nm->mac_changes, 0);
3697 pending_resolution_t * mc_last = 0;
3699 p = mhash_get (&nm->mac_changes_by_address, address);
3701 return VNET_API_ERROR_NO_SUCH_ENTRY;
3705 while (index != (u32)~0)
3707 mc = pool_elt_at_index (nm->mac_changes, index);
3708 if (mc->node_index == node_index &&
3709 mc->type_opaque == type_opaque &&
3712 /* Clients may need to clean up pool entries, too */
3714 (*fp)(mc->data, 0 /* no new mac addrs */);
3717 mhash_unset (&nm->mac_changes_by_address, address, 0);
3718 if (mc->next_index != ~0)
3719 mhash_set (&nm->mac_changes_by_address, address,
3721 pool_put (nm->mac_changes, mc);
3727 mc_last->next_index = mc->next_index;
3728 pool_put (nm->mac_changes, mc);
3733 index = mc->next_index;
3736 return VNET_API_ERROR_NO_SUCH_ENTRY;
3740 int vnet_ip6_nd_term (vlib_main_t * vm,
3741 vlib_node_runtime_t * node,
3743 ethernet_header_t * eth,
3749 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3750 icmp6_neighbor_solicitation_or_advertisement_header_t * ndh;
3751 pending_resolution_t * mc;
3754 ndh = ip6_next_header (ip);
3755 if (ndh->icmp.type != ICMP6_neighbor_solicitation &&
3756 ndh->icmp.type != ICMP6_neighbor_advertisement)
3759 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
3760 (p0->flags & VLIB_BUFFER_IS_TRACED)))
3762 u8 *t0 = vlib_add_trace (vm, node, p0,
3763 sizeof (icmp6_input_trace_t));
3764 clib_memcpy (t0, ip, sizeof (icmp6_input_trace_t));
3767 /* Check if anyone want ND events for L2 BDs */
3768 p = mhash_get (&nm->mac_changes_by_address, &ip6a_zero);
3769 if (p && shg == 0 && /* Only SHG 0 interface which is more likely local */
3770 !ip6_address_is_link_local_unicast (&ip->src_address))
3772 u32 next_index = p[0];
3773 while (next_index != (u32)~0)
3775 int (*fp)(u32, u8 *, u32, ip6_address_t *);
3777 mc = pool_elt_at_index (nm->mac_changes, next_index);
3778 fp = mc->data_callback;
3779 /* Call the callback, return 1 to suppress dup events */
3780 if (fp) rv = (*fp)(mc->data,
3784 /* Signal the resolver process */
3786 vlib_process_signal_event (vm, mc->node_index,
3789 next_index = mc->next_index;
3793 /* Check if MAC entry exsist for solicited target IP */
3794 if (ndh->icmp.type == ICMP6_neighbor_solicitation)
3796 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t * opt;
3797 l2_bridge_domain_t *bd_config;
3800 opt = (void *) (ndh + 1);
3801 if ((opt->header.type !=
3802 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address) ||
3803 (opt->header.n_data_u64s != 1))
3804 return 0; /* source link layer address option not present */
3806 bd_config = vec_elt_at_index (l2input_main.bd_configs, bd_index);
3807 macp = (u8 *) hash_get_mem (bd_config->mac_by_ip6, &ndh->target_address);
3809 { /* found ip-mac entry, generate eighbor advertisement response */
3811 vlib_node_runtime_t * error_node =
3812 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
3813 ip->dst_address = ip->src_address;
3814 ip->src_address = ndh->target_address;
3815 ip->hop_limit = 255;
3817 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
3818 clib_memcpy (opt->ethernet_address, macp, 6);
3819 ndh->icmp.type = ICMP6_neighbor_advertisement;
3820 ndh->advertisement_flags = clib_host_to_net_u32
3821 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED |
3822 ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
3823 ndh->icmp.checksum = 0;
3824 ndh->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum(vm, p0, ip,
3826 clib_memcpy(eth->dst_address, eth->src_address, 6);
3827 clib_memcpy(eth->src_address, macp, 6);
3828 vlib_error_count (vm, error_node->node_index,
3829 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX, 1);
3839 ethernet_ndp_change_mac (vlib_main_t * vm, u32 sw_if_index)
3841 ip6_neighbor_main_t * nm = &ip6_neighbor_main;
3845 pool_foreach (n, nm->neighbor_pool, ({
3846 if (n->key.sw_if_index == sw_if_index)
3848 adj_nbr_walk_nh6 (sw_if_index,
3849 &n->key.ip6_address,
3850 ip6_nd_mk_complete_walk, n);