2 * ip/ip6_neighbor.c: IP6 neighbor handling
4 * Copyright (c) 2010 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
18 #include <vnet/ip/ip.h>
19 #include <vnet/ip/ip6_neighbor.h>
20 #include <vnet/ethernet/ethernet.h>
21 #include <vppinfra/mhash.h>
22 #include <vppinfra/md5.h>
23 #include <vnet/adj/adj.h>
24 #include <vnet/fib/fib_table.h>
25 #include <vnet/fib/ip6_fib.h>
29 * @brief IPv6 Neighbor Adjacency and Neighbor Discovery.
31 * The files contains the API and CLI code for managing IPv6 neighbor
32 * adjacency tables and neighbor discovery logic.
35 /* can't use sizeof link_layer_address, that's 8 */
36 #define ETHER_MAC_ADDR_LEN 6
38 /* advertised prefix option */
41 /* basic advertised information */
45 int adv_autonomous_flag;
46 u32 adv_valid_lifetime_in_secs;
47 u32 adv_pref_lifetime_in_secs;
49 /* advertised values are computed from these times if decrementing */
50 f64 valid_lifetime_expires;
51 f64 pref_lifetime_expires;
53 /* local information */
55 int deprecated_prefix_flag;
56 int decrement_lifetime_flag;
58 #define MIN_ADV_VALID_LIFETIME 7203 /* seconds */
59 #define DEF_ADV_VALID_LIFETIME 2592000
60 #define DEF_ADV_PREF_LIFETIME 604800
62 /* extensions are added here, mobile, DNS etc.. */
68 /* group information */
70 ip6_address_t mcast_address;
72 ip6_address_t *mcast_source_address_pool;
75 /* configured router advertisement information per ipv6 interface */
79 /* advertised config information, zero means unspecified */
83 u16 adv_router_lifetime_in_sec;
84 u32 adv_neighbor_reachable_time_in_msec;
85 u32 adv_time_in_msec_between_retransmitted_neighbor_solicitations;
90 /* source link layer option */
91 u8 link_layer_address[8];
92 u8 link_layer_addr_len;
95 ip6_radv_prefix_t *adv_prefixes_pool;
97 /* Hash table mapping address to index in interface advertised prefix pool. */
98 mhash_t address_to_prefix_index;
100 /* MLDP group information */
101 ip6_mldp_group_t *mldp_group_pool;
103 /* Hash table mapping address to index in mldp address pool. */
104 mhash_t address_to_mldp_index;
106 /* local information */
109 int send_radv; /* radv on/off on this interface - set by config */
110 int cease_radv; /* we are ceasing to send - set byf config */
112 int adv_link_layer_address;
114 int failed_device_check;
115 int all_routers_mcast;
119 adj_index_t all_nodes_adj_index;
120 adj_index_t all_routers_adj_index;
121 adj_index_t all_mldv2_routers_adj_index;
123 /* timing information */
124 #define DEF_MAX_RADV_INTERVAL 200
125 #define DEF_MIN_RADV_INTERVAL .75 * DEF_MAX_RADV_INTERVAL
126 #define DEF_CURR_HOP_LIMIT 64
127 #define DEF_DEF_RTR_LIFETIME 3 * DEF_MAX_RADV_INTERVAL
128 #define MAX_DEF_RTR_LIFETIME 9000
130 #define MAX_INITIAL_RTR_ADVERT_INTERVAL 16 /* seconds */
131 #define MAX_INITIAL_RTR_ADVERTISEMENTS 3 /*transmissions */
132 #define MIN_DELAY_BETWEEN_RAS 3 /* seconds */
133 #define MAX_DELAY_BETWEEN_RAS 1800 /* seconds */
134 #define MAX_RA_DELAY_TIME .5 /* seconds */
136 f64 max_radv_interval;
137 f64 min_radv_interval;
138 f64 min_delay_between_radv;
139 f64 max_delay_between_radv;
140 f64 max_rtr_default_lifetime;
143 f64 last_multicast_time;
144 f64 next_multicast_time;
147 u32 initial_adverts_count;
148 f64 initial_adverts_interval;
149 u32 initial_adverts_sent;
152 u32 n_advertisements_sent;
153 u32 n_solicitations_rcvd;
154 u32 n_solicitations_dropped;
156 /* Link local address to use (defaults to underlying physical for logical interfaces */
157 ip6_address_t link_local_address;
158 u8 link_local_prefix_len;
168 /* Used for nd event notification only */
171 } pending_resolution_t;
176 /* Hash tables mapping name to opcode. */
177 uword *opcode_by_name;
179 /* lite beer "glean" adjacency handling */
180 mhash_t pending_resolutions_by_address;
181 pending_resolution_t *pending_resolutions;
183 /* Mac address change notification */
184 mhash_t mac_changes_by_address;
185 pending_resolution_t *mac_changes;
187 u32 *neighbor_input_next_index_by_hw_if_index;
189 ip6_neighbor_t *neighbor_pool;
191 mhash_t neighbor_index_by_key;
193 u32 *if_radv_pool_index_by_sw_if_index;
195 ip6_radv_t *if_radv_pool;
197 /* Neighbor attack mitigation */
198 u32 limit_neighbor_cache_size;
199 u32 neighbor_delete_rotor;
201 } ip6_neighbor_main_t;
203 static ip6_neighbor_main_t ip6_neighbor_main;
204 static ip6_address_t ip6a_zero; /* ip6 address 0 */
207 format_ip6_neighbor_ip6_entry (u8 * s, va_list * va)
209 vlib_main_t *vm = va_arg (*va, vlib_main_t *);
210 ip6_neighbor_t *n = va_arg (*va, ip6_neighbor_t *);
211 vnet_main_t *vnm = vnet_get_main ();
212 vnet_sw_interface_t *si;
216 return format (s, "%=12s%=20s%=6s%=20s%=40s", "Time", "Address", "Flags",
217 "Link layer", "Interface");
219 if (n->flags & IP6_NEIGHBOR_FLAG_DYNAMIC)
220 flags = format (flags, "D");
222 if (n->flags & IP6_NEIGHBOR_FLAG_STATIC)
223 flags = format (flags, "S");
225 si = vnet_get_sw_interface (vnm, n->key.sw_if_index);
226 s = format (s, "%=12U%=20U%=6s%=20U%=40U",
227 format_vlib_cpu_time, vm, n->cpu_time_last_updated,
228 format_ip6_address, &n->key.ip6_address,
229 flags ? (char *) flags : "",
230 format_ethernet_address, n->link_layer_address,
231 format_vnet_sw_interface_name, vnm, si);
237 static clib_error_t *
238 ip6_neighbor_sw_interface_up_down (vnet_main_t * vnm,
239 u32 sw_if_index, u32 flags)
241 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
244 if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
246 u32 i, *to_delete = 0;
249 pool_foreach (n, nm->neighbor_pool,
251 if (n->key.sw_if_index == sw_if_index)
252 vec_add1 (to_delete, n - nm->neighbor_pool);
256 for (i = 0; i < vec_len (to_delete); i++)
258 n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
259 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
260 fib_table_entry_delete_index (n->fib_entry_index, FIB_SOURCE_ADJ);
261 pool_put (nm->neighbor_pool, n);
264 vec_free (to_delete);
270 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_neighbor_sw_interface_up_down);
273 unset_random_neighbor_entry (void)
275 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
276 vnet_main_t *vnm = vnet_get_main ();
277 vlib_main_t *vm = vnm->vlib_main;
281 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
282 nm->neighbor_delete_rotor = index;
284 /* Try again from elt 0, could happen if an intfc goes down */
287 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
288 nm->neighbor_delete_rotor = index;
291 /* Nothing left in the pool */
295 e = pool_elt_at_index (nm->neighbor_pool, index);
297 vnet_unset_ip6_ethernet_neighbor (vm, e->key.sw_if_index,
299 e->link_layer_address,
307 u8 link_layer_address[6];
310 } ip6_neighbor_set_unset_rpc_args_t;
312 static void ip6_neighbor_set_unset_rpc_callback
313 (ip6_neighbor_set_unset_rpc_args_t * a);
315 static void set_unset_ip6_neighbor_rpc
318 ip6_address_t * a, u8 * link_layer_addreess, int is_add, int is_static)
320 ip6_neighbor_set_unset_rpc_args_t args;
321 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
323 args.sw_if_index = sw_if_index;
324 args.is_add = is_add;
325 args.is_static = is_static;
326 clib_memcpy (&args.addr, a, sizeof (*a));
327 clib_memcpy (args.link_layer_address, link_layer_addreess, 6);
329 vl_api_rpc_call_main_thread (ip6_neighbor_set_unset_rpc_callback,
330 (u8 *) & args, sizeof (args));
334 ip6_nbr_probe (ip_adjacency_t * adj)
336 icmp6_neighbor_solicitation_header_t *h;
337 vnet_main_t *vnm = vnet_get_main ();
338 ip6_main_t *im = &ip6_main;
339 ip_interface_address_t *ia;
340 ip6_address_t *dst, *src;
341 vnet_hw_interface_t *hi;
342 vnet_sw_interface_t *si;
348 vm = vlib_get_main ();
350 si = vnet_get_sw_interface (vnm, adj->rewrite_header.sw_if_index);
351 dst = &adj->sub_type.nbr.next_hop.ip6;
353 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
357 src = ip6_interface_address_matching_destination (im, dst,
365 h = vlib_packet_template_get_packet (vm,
366 &im->discover_neighbor_packet_template,
369 hi = vnet_get_sup_hw_interface (vnm, adj->rewrite_header.sw_if_index);
371 h->ip.dst_address.as_u8[13] = dst->as_u8[13];
372 h->ip.dst_address.as_u8[14] = dst->as_u8[14];
373 h->ip.dst_address.as_u8[15] = dst->as_u8[15];
374 h->ip.src_address = src[0];
375 h->neighbor.target_address = dst[0];
377 clib_memcpy (h->link_layer_option.ethernet_address,
378 hi->hw_address, vec_len (hi->hw_address));
380 h->neighbor.icmp.checksum =
381 ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
382 ASSERT (bogus_length == 0);
384 b = vlib_get_buffer (vm, bi);
385 vnet_buffer (b)->sw_if_index[VLIB_RX] =
386 vnet_buffer (b)->sw_if_index[VLIB_TX] = adj->rewrite_header.sw_if_index;
388 /* Add encapsulation string for software interface (e.g. ethernet header). */
389 vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
390 vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
393 vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
394 u32 *to_next = vlib_frame_vector_args (f);
397 vlib_put_frame_to_node (vm, hi->output_node_index, f);
402 ip6_nd_mk_complete (adj_index_t ai, ip6_neighbor_t * nbr)
404 adj_nbr_update_rewrite (ai, ADJ_NBR_REWRITE_FLAG_COMPLETE,
405 ethernet_build_rewrite (vnet_get_main (),
406 nbr->key.sw_if_index,
407 adj_get_link_type (ai),
408 nbr->link_layer_address));
412 ip6_nd_mk_incomplete (adj_index_t ai)
414 ip_adjacency_t *adj = adj_get (ai);
416 adj_nbr_update_rewrite (ai,
417 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
418 ethernet_build_rewrite (vnet_get_main (),
421 adj_get_link_type (ai),
422 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
425 #define IP6_NBR_MK_KEY(k, sw_if_index, addr) \
427 k.sw_if_index = sw_if_index; \
428 k.ip6_address = *addr; \
432 static ip6_neighbor_t *
433 ip6_nd_find (u32 sw_if_index, const ip6_address_t * addr)
435 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
436 ip6_neighbor_t *n = NULL;
437 ip6_neighbor_key_t k;
440 IP6_NBR_MK_KEY (k, sw_if_index, addr);
442 p = mhash_get (&nm->neighbor_index_by_key, &k);
445 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
452 ip6_nd_mk_complete_walk (adj_index_t ai, void *ctx)
454 ip6_neighbor_t *nbr = ctx;
456 ip6_nd_mk_complete (ai, nbr);
458 return (ADJ_WALK_RC_CONTINUE);
462 ip6_nd_mk_incomplete_walk (adj_index_t ai, void *ctx)
464 ip6_nd_mk_incomplete (ai);
466 return (ADJ_WALK_RC_CONTINUE);
470 ip6_ethernet_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
477 nbr = ip6_nd_find (sw_if_index, &adj->sub_type.nbr.next_hop.ip6);
481 adj_nbr_walk_nh6 (sw_if_index, &nbr->key.ip6_address,
482 ip6_nd_mk_complete_walk, nbr);
487 * no matching ND entry.
488 * construct the rewrite required to for an ND packet, and stick
489 * that in the adj's pipe to smoke.
491 adj_nbr_update_rewrite (ai,
492 ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
493 ethernet_build_rewrite (vnm,
496 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
499 * since the FIB has added this adj for a route, it makes sense it may
500 * want to forward traffic sometime soon. Let's send a speculative ND.
501 * just one. If we were to do periodically that wouldn't be bad either,
502 * but that's more code than i'm prepared to write at this time for
503 * relatively little reward.
510 vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
513 u8 * link_layer_address,
514 uword n_bytes_link_layer_address,
517 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
518 ip6_neighbor_key_t k;
519 ip6_neighbor_t *n = 0;
520 int make_new_nd_cache_entry = 1;
523 pending_resolution_t *pr, *mc;
525 if (os_get_cpu_number ())
527 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
528 1 /* set new neighbor */ , is_static);
532 k.sw_if_index = sw_if_index;
533 k.ip6_address = a[0];
536 p = mhash_get (&nm->neighbor_index_by_key, &k);
539 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
540 /* Refuse to over-write static neighbor entry. */
541 if (!is_static && (n->flags & IP6_NEIGHBOR_FLAG_STATIC))
543 make_new_nd_cache_entry = 0;
546 if (make_new_nd_cache_entry)
550 .fp_proto = FIB_PROTOCOL_IP6,
552 .ip6 = k.ip6_address,
558 pool_get (nm->neighbor_pool, n);
559 mhash_set (&nm->neighbor_index_by_key, &k, n - nm->neighbor_pool,
563 clib_memcpy (n->link_layer_address,
564 link_layer_address, n_bytes_link_layer_address);
567 * create the adj-fib. the entry in the FIB table for and to the peer.
569 fib_index = ip6_main.fib_index_by_sw_if_index[n->key.sw_if_index];
570 n->fib_entry_index = fib_table_entry_update_one_path (fib_index, &pfx, FIB_SOURCE_ADJ, FIB_ENTRY_FLAG_NONE, FIB_PROTOCOL_IP6, &pfx.fp_addr, n->key.sw_if_index, ~0, 1, NULL, // no label stack
571 FIB_ROUTE_PATH_FLAG_NONE);
576 * prevent a DoS attack from the data-plane that
577 * spams us with no-op updates to the MAC address
579 if (0 == memcmp (n->link_layer_address,
580 link_layer_address, n_bytes_link_layer_address))
583 clib_memcpy (n->link_layer_address,
584 link_layer_address, n_bytes_link_layer_address);
587 /* Update time stamp and flags. */
588 n->cpu_time_last_updated = clib_cpu_time_now ();
590 n->flags |= IP6_NEIGHBOR_FLAG_STATIC;
592 n->flags |= IP6_NEIGHBOR_FLAG_DYNAMIC;
594 adj_nbr_walk_nh6 (sw_if_index,
595 &n->key.ip6_address, ip6_nd_mk_complete_walk, n);
597 /* Customer(s) waiting for this address to be resolved? */
598 p = mhash_get (&nm->pending_resolutions_by_address, a);
603 while (next_index != (u32) ~ 0)
605 pr = pool_elt_at_index (nm->pending_resolutions, next_index);
606 vlib_process_signal_event (vm, pr->node_index,
607 pr->type_opaque, pr->data);
608 next_index = pr->next_index;
609 pool_put (nm->pending_resolutions, pr);
612 mhash_unset (&nm->pending_resolutions_by_address, a, 0);
615 /* Customer(s) requesting ND event for this address? */
616 p = mhash_get (&nm->mac_changes_by_address, a);
621 while (next_index != (u32) ~ 0)
623 int (*fp) (u32, u8 *, u32, ip6_address_t *);
625 mc = pool_elt_at_index (nm->mac_changes, next_index);
626 fp = mc->data_callback;
628 /* Call the user's data callback, return 1 to suppress dup events */
631 (*fp) (mc->data, link_layer_address, sw_if_index, &ip6a_zero);
633 * Signal the resolver process, as long as the user
634 * says they want to be notified
637 vlib_process_signal_event (vm, mc->node_index,
638 mc->type_opaque, mc->data);
639 next_index = mc->next_index;
647 vnet_unset_ip6_ethernet_neighbor (vlib_main_t * vm,
650 u8 * link_layer_address,
651 uword n_bytes_link_layer_address)
653 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
654 ip6_neighbor_key_t k;
659 if (os_get_cpu_number ())
661 set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
666 k.sw_if_index = sw_if_index;
667 k.ip6_address = a[0];
670 p = mhash_get (&nm->neighbor_index_by_key, &k);
677 n = pool_elt_at_index (nm->neighbor_pool, p[0]);
678 mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
680 adj_nbr_walk_nh6 (sw_if_index,
681 &n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL);
683 fib_table_entry_delete_index (n->fib_entry_index, FIB_SOURCE_ADJ);
684 pool_put (nm->neighbor_pool, n);
690 static void ip6_neighbor_set_unset_rpc_callback
691 (ip6_neighbor_set_unset_rpc_args_t * a)
693 vlib_main_t *vm = vlib_get_main ();
695 vnet_set_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
696 a->link_layer_address, 6, a->is_static);
698 vnet_unset_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
699 a->link_layer_address, 6);
703 ip6_neighbor_sort (void *a1, void *a2)
705 vnet_main_t *vnm = vnet_get_main ();
706 ip6_neighbor_t *n1 = a1, *n2 = a2;
708 cmp = vnet_sw_interface_compare (vnm, n1->key.sw_if_index,
709 n2->key.sw_if_index);
711 cmp = ip6_address_compare (&n1->key.ip6_address, &n2->key.ip6_address);
716 ip6_neighbors_entries (u32 sw_if_index)
718 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
719 ip6_neighbor_t *n, *ns = 0;
722 pool_foreach (n, nm->neighbor_pool,
724 if (sw_if_index != ~0 && n->key.sw_if_index != sw_if_index)
731 vec_sort_with_function (ns, ip6_neighbor_sort);
735 static clib_error_t *
736 show_ip6_neighbors (vlib_main_t * vm,
737 unformat_input_t * input, vlib_cli_command_t * cmd)
739 vnet_main_t *vnm = vnet_get_main ();
740 ip6_neighbor_t *n, *ns;
741 clib_error_t *error = 0;
744 /* Filter entries by interface if given. */
746 (void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index);
748 ns = ip6_neighbors_entries (sw_if_index);
751 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, 0);
754 vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, n);
763 * This command is used to display the adjacent IPv6 hosts found via
764 * neighbor discovery. Optionally, limit the output to the specified
768 * Example of how to display the IPv6 neighbor adjacency table:
769 * @cliexstart{show ip6 neighbors}
770 * Time Address Flags Link layer Interface
771 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
772 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
773 * 886.6654 ::1:1:c:0:9 S 02:fe:e4:45:27:5b GigabitEthernet3/0/0
775 * Example of how to display the IPv6 neighbor adjacency table for given interface:
776 * @cliexstart{show ip6 neighbors GigabitEthernet2/0/0}
777 * Time Address Flags Link layer Interface
778 * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
779 * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
783 VLIB_CLI_COMMAND (show_ip6_neighbors_command, static) = {
784 .path = "show ip6 neighbors",
785 .function = show_ip6_neighbors,
786 .short_help = "show ip6 neighbors [<interface>]",
790 static clib_error_t *
791 set_ip6_neighbor (vlib_main_t * vm,
792 unformat_input_t * input, vlib_cli_command_t * cmd)
794 vnet_main_t *vnm = vnet_get_main ();
802 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
804 /* intfc, ip6-address, mac-address */
805 if (unformat (input, "%U %U %U",
806 unformat_vnet_sw_interface, vnm, &sw_if_index,
807 unformat_ip6_address, &addr,
808 unformat_ethernet_address, mac_address))
811 else if (unformat (input, "delete") || unformat (input, "del"))
813 else if (unformat (input, "static"))
820 return clib_error_return (0, "Missing interface, ip6 or hw address");
823 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
824 mac_address, sizeof (mac_address),
827 vnet_unset_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
828 mac_address, sizeof (mac_address));
833 * This command is used to manually add an entry to the IPv6 neighbor
834 * adjacency table. Optionally, the entry can be added as static. It is
835 * also used to remove an entry from the table. Use the '<em>show ip6
836 * neighbors</em>' command to display all learned and manually entered entries.
839 * Example of how to add a static entry to the IPv6 neighbor adjacency table:
840 * @cliexcmd{set ip6 neighbor GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b static}
841 * Example of how to delete an entry from the IPv6 neighbor adjacency table:
842 * @cliexcmd{set ip6 neighbor del GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b}
845 VLIB_CLI_COMMAND (set_ip6_neighbor_command, static) =
847 .path = "set ip6 neighbor",
848 .function = set_ip6_neighbor,
849 .short_help = "set ip6 neighbor [del] <interface> <ip6-address> <mac-address> [static]",
855 ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP,
856 ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY,
857 ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
858 } icmp6_neighbor_solicitation_or_advertisement_next_t;
860 static_always_inline uword
861 icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
862 vlib_node_runtime_t * node,
863 vlib_frame_t * frame,
864 uword is_solicitation)
866 vnet_main_t *vnm = vnet_get_main ();
867 ip6_main_t *im = &ip6_main;
868 uword n_packets = frame->n_vectors;
870 u32 n_left_from, n_left_to_next, next_index, n_advertisements_sent;
871 icmp6_neighbor_discovery_option_type_t option_type;
872 vlib_node_runtime_t *error_node =
873 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
876 from = vlib_frame_vector_args (frame);
877 n_left_from = n_packets;
878 next_index = node->cached_next_index;
880 if (node->flags & VLIB_NODE_FLAG_TRACE)
881 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
883 sizeof (icmp6_input_trace_t));
887 ? ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address
888 : ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address);
889 n_advertisements_sent = 0;
891 while (n_left_from > 0)
893 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
895 while (n_left_from > 0 && n_left_to_next > 0)
899 icmp6_neighbor_solicitation_or_advertisement_header_t *h0;
900 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
901 u32 bi0, options_len0, sw_if_index0, next0, error0;
902 u32 ip6_sadd_link_local, ip6_sadd_unspecified;
906 bi0 = to_next[0] = from[0];
913 p0 = vlib_get_buffer (vm, bi0);
914 ip0 = vlib_buffer_get_current (p0);
915 h0 = ip6_next_header (ip0);
917 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
919 error0 = ICMP6_ERROR_NONE;
920 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
921 ip6_sadd_link_local =
922 ip6_address_is_link_local_unicast (&ip0->src_address);
923 ip6_sadd_unspecified =
924 ip6_address_is_unspecified (&ip0->src_address);
926 /* Check that source address is unspecified, link-local or else on-link. */
927 if (!ip6_sadd_unspecified && !ip6_sadd_link_local)
929 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
931 if (ADJ_INDEX_INVALID != src_adj_index0)
933 ip_adjacency_t *adj0 =
934 ip_get_adjacency (&im->lookup_main, src_adj_index0);
936 /* Allow all realistic-looking rewrite adjacencies to pass */
937 ni0 = adj0->lookup_next_index;
938 is_rewrite0 = (ni0 >= IP_LOOKUP_NEXT_ARP) &&
939 (ni0 < IP6_LOOKUP_N_NEXT);
941 error0 = ((adj0->rewrite_header.sw_if_index != sw_if_index0
944 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK
950 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK;
954 o0 = (void *) (h0 + 1);
955 o0 = ((options_len0 == 8 && o0->header.type == option_type
956 && o0->header.n_data_u64s == 1) ? o0 : 0);
958 /* If src address unspecified or link local, donot learn neighbor MAC */
959 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
960 !ip6_sadd_unspecified && !ip6_sadd_link_local))
962 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
963 if (nm->limit_neighbor_cache_size &&
964 pool_elts (nm->neighbor_pool) >=
965 nm->limit_neighbor_cache_size)
966 unset_random_neighbor_entry ();
967 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
971 o0->ethernet_address,
972 sizeof (o0->ethernet_address),
976 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
978 /* Check that target address is local to this router. */
979 fib_node_index_t fei;
983 ip6_fib_table_get_index_for_sw_if_index (sw_if_index0);
987 error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
991 fei = ip6_fib_table_lookup_exact_match (fib_index,
995 if (FIB_NODE_INDEX_INVALID == fei ||
996 !(FIB_ENTRY_FLAG_LOCAL &
997 fib_entry_get_flags_for_source (fei,
998 FIB_SOURCE_INTERFACE)))
1001 ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
1006 if (is_solicitation)
1007 next0 = (error0 != ICMP6_ERROR_NONE
1008 ? ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP
1009 : ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY);
1013 error0 = error0 == ICMP6_ERROR_NONE ?
1014 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_RX : error0;
1017 if (is_solicitation && error0 == ICMP6_ERROR_NONE)
1019 vnet_sw_interface_t *sw_if0;
1020 ethernet_interface_t *eth_if0;
1021 ethernet_header_t *eth0;
1023 /* dst address is either source address or the all-nodes mcast addr */
1024 if (!ip6_sadd_unspecified)
1025 ip0->dst_address = ip0->src_address;
1027 ip6_set_reserved_multicast_address (&ip0->dst_address,
1028 IP6_MULTICAST_SCOPE_link_local,
1029 IP6_MULTICAST_GROUP_ID_all_hosts);
1031 ip0->src_address = h0->target_address;
1032 ip0->hop_limit = 255;
1033 h0->icmp.type = ICMP6_neighbor_advertisement;
1035 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1036 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1038 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1041 clib_memcpy (o0->ethernet_address, eth_if0->address, 6);
1043 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
1046 h0->advertisement_flags = clib_host_to_net_u32
1047 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED
1048 | ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
1050 h0->icmp.checksum = 0;
1052 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1054 ASSERT (bogus_length == 0);
1056 /* Reuse current MAC header, copy SMAC to DMAC and
1057 * interface MAC to SMAC */
1058 vlib_buffer_advance (p0, -ethernet_buffer_header_size (p0));
1059 eth0 = vlib_buffer_get_current (p0);
1060 clib_memcpy (eth0->dst_address, eth0->src_address, 6);
1062 clib_memcpy (eth0->src_address, eth_if0->address, 6);
1064 /* Setup input and output sw_if_index for packet */
1065 ASSERT (vnet_buffer (p0)->sw_if_index[VLIB_RX] == sw_if_index0);
1066 vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
1067 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1068 vnet_main.local_interface_sw_if_index;
1070 n_advertisements_sent++;
1073 p0->error = error_node->errors[error0];
1075 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1076 to_next, n_left_to_next,
1080 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1083 /* Account for advertisements sent. */
1084 vlib_error_count (vm, error_node->node_index,
1085 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX,
1086 n_advertisements_sent);
1088 return frame->n_vectors;
1091 /* for "syslogging" - use elog for now */
1092 #define foreach_log_level \
1093 _ (DEBUG, "DEBUG") \
1094 _ (INFO, "INFORMATION") \
1095 _ (NOTICE, "NOTICE") \
1096 _ (WARNING, "WARNING") \
1098 _ (CRIT, "CRITICAL") \
1099 _ (ALERT, "ALERT") \
1100 _ (EMERG, "EMERGENCY")
1104 #define _(f,s) LOG_##f,
1109 static char *log_level_strings[] = {
1115 static int logmask = 1 << LOG_DEBUG;
1118 ip6_neighbor_syslog (vlib_main_t * vm, int priority, char *fmt, ...)
1120 /* just use elog for now */
1124 if ((priority > LOG_EMERG) || !(logmask & (1 << priority)))
1130 what = va_format (0, fmt, &va);
1132 ELOG_TYPE_DECLARE (e) =
1134 .format = "ip6 nd: (%s): %s",.format_args = "T4T4",};
1139 ed = ELOG_DATA (&vm->elog_main, e);
1140 ed->s[0] = elog_string (&vm->elog_main, log_level_strings[priority]);
1141 ed->s[1] = elog_string (&vm->elog_main, (char *) what);
1147 /* ipv6 neighbor discovery - router advertisements */
1150 ICMP6_ROUTER_SOLICITATION_NEXT_DROP,
1151 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW,
1152 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX,
1153 ICMP6_ROUTER_SOLICITATION_N_NEXT,
1154 } icmp6_router_solicitation_or_advertisement_next_t;
1156 static_always_inline uword
1157 icmp6_router_solicitation (vlib_main_t * vm,
1158 vlib_node_runtime_t * node, vlib_frame_t * frame)
1160 vnet_main_t *vnm = vnet_get_main ();
1161 ip6_main_t *im = &ip6_main;
1162 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1163 uword n_packets = frame->n_vectors;
1164 u32 *from, *to_next;
1165 u32 n_left_from, n_left_to_next, next_index;
1166 u32 n_advertisements_sent = 0;
1169 icmp6_neighbor_discovery_option_type_t option_type;
1171 vlib_node_runtime_t *error_node =
1172 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1174 from = vlib_frame_vector_args (frame);
1175 n_left_from = n_packets;
1176 next_index = node->cached_next_index;
1178 if (node->flags & VLIB_NODE_FLAG_TRACE)
1179 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1181 sizeof (icmp6_input_trace_t));
1183 /* source may append his LL address */
1184 option_type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1186 while (n_left_from > 0)
1188 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1190 while (n_left_from > 0 && n_left_to_next > 0)
1194 ip6_radv_t *radv_info = 0;
1196 icmp6_neighbor_discovery_header_t *h0;
1197 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
1199 u32 bi0, options_len0, sw_if_index0, next0, error0;
1200 u32 is_solicitation = 1, is_dropped = 0;
1201 u32 is_unspecified, is_link_local;
1203 bi0 = to_next[0] = from[0];
1208 n_left_to_next -= 1;
1210 p0 = vlib_get_buffer (vm, bi0);
1211 ip0 = vlib_buffer_get_current (p0);
1212 h0 = ip6_next_header (ip0);
1214 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1215 is_unspecified = ip6_address_is_unspecified (&ip0->src_address);
1217 ip6_address_is_link_local_unicast (&ip0->src_address);
1219 error0 = ICMP6_ERROR_NONE;
1220 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1222 /* check if solicitation (not from nd_timer node) */
1223 if (ip6_address_is_unspecified (&ip0->dst_address))
1224 is_solicitation = 0;
1226 /* Check that source address is unspecified, link-local or else on-link. */
1227 if (!is_unspecified && !is_link_local)
1229 u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
1231 if (ADJ_INDEX_INVALID != src_adj_index0)
1233 ip_adjacency_t *adj0 = ip_get_adjacency (&im->lookup_main,
1236 error0 = (adj0->rewrite_header.sw_if_index != sw_if_index0
1238 ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK
1243 error0 = ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK;
1247 /* check for source LL option and process */
1248 o0 = (void *) (h0 + 1);
1249 o0 = ((options_len0 == 8
1250 && o0->header.type == option_type
1251 && o0->header.n_data_u64s == 1) ? o0 : 0);
1253 /* if src address unspecified IGNORE any options */
1254 if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
1255 !is_unspecified && !is_link_local))
1257 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1258 if (nm->limit_neighbor_cache_size &&
1259 pool_elts (nm->neighbor_pool) >=
1260 nm->limit_neighbor_cache_size)
1261 unset_random_neighbor_entry ();
1263 vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
1265 o0->ethernet_address,
1266 sizeof (o0->ethernet_address),
1270 /* default is to drop */
1271 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1273 if (error0 == ICMP6_ERROR_NONE)
1275 vnet_sw_interface_t *sw_if0;
1276 ethernet_interface_t *eth_if0;
1279 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1280 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1282 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1284 /* only support ethernet interface type for now */
1286 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1289 if (error0 == ICMP6_ERROR_NONE)
1293 /* adjust the sizeof the buffer to just include the ipv6 header */
1294 p0->current_length -=
1296 sizeof (icmp6_neighbor_discovery_header_t));
1298 /* look up the radv_t information for this interface */
1299 vec_validate_init_empty
1300 (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
1302 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1305 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1309 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1312 if (error0 == ICMP6_ERROR_NONE)
1314 f64 now = vlib_time_now (vm);
1316 /* for solicited adverts - need to rate limit */
1317 if (is_solicitation)
1319 if ((now - radv_info->last_radv_time) <
1320 MIN_DELAY_BETWEEN_RAS)
1323 radv_info->last_radv_time = now;
1327 icmp6_router_advertisement_header_t rh;
1329 rh.icmp.type = ICMP6_router_advertisement;
1331 rh.icmp.checksum = 0;
1333 rh.current_hop_limit = radv_info->curr_hop_limit;
1334 rh.router_lifetime_in_sec =
1335 clib_host_to_net_u16
1336 (radv_info->adv_router_lifetime_in_sec);
1338 time_in_msec_between_retransmitted_neighbor_solicitations
1340 clib_host_to_net_u32 (radv_info->
1341 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
1342 rh.neighbor_reachable_time_in_msec =
1343 clib_host_to_net_u32 (radv_info->
1344 adv_neighbor_reachable_time_in_msec);
1347 (radv_info->adv_managed_flag) ?
1348 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP :
1351 ((radv_info->adv_other_flag) ?
1352 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP :
1356 u16 payload_length =
1357 sizeof (icmp6_router_advertisement_header_t);
1359 vlib_buffer_add_data (vm,
1360 p0->free_list_index,
1364 (icmp6_router_advertisement_header_t));
1366 if (radv_info->adv_link_layer_address)
1368 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
1372 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1373 h.header.n_data_u64s = 1;
1375 /* copy ll address */
1376 clib_memcpy (&h.ethernet_address[0],
1377 eth_if0->address, 6);
1379 vlib_buffer_add_data (vm,
1380 p0->free_list_index,
1384 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t));
1388 (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t);
1391 /* add MTU option */
1392 if (radv_info->adv_link_mtu)
1394 icmp6_neighbor_discovery_mtu_option_t h;
1398 clib_host_to_net_u32 (radv_info->adv_link_mtu);
1399 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu;
1400 h.header.n_data_u64s = 1;
1403 sizeof (icmp6_neighbor_discovery_mtu_option_t);
1405 vlib_buffer_add_data (vm,
1406 p0->free_list_index,
1410 (icmp6_neighbor_discovery_mtu_option_t));
1413 /* add advertised prefix options */
1414 ip6_radv_prefix_t *pr_info;
1417 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
1419 if(pr_info->enabled &&
1420 (!pr_info->decrement_lifetime_flag
1421 || (pr_info->pref_lifetime_expires >0)))
1423 /* advertise this prefix */
1424 icmp6_neighbor_discovery_prefix_information_option_t h;
1426 h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information;
1427 h.header.n_data_u64s = (sizeof(icmp6_neighbor_discovery_prefix_information_option_t) >> 3);
1429 h.dst_address_length = pr_info->prefix_len;
1431 h.flags = (pr_info->adv_on_link_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_FLAG_ON_LINK : 0;
1432 h.flags |= (pr_info->adv_autonomous_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_AUTO : 0;
1434 if(radv_info->cease_radv && pr_info->deprecated_prefix_flag)
1436 h.valid_time = clib_host_to_net_u32(MIN_ADV_VALID_LIFETIME);
1437 h.preferred_time = 0;
1441 if(pr_info->decrement_lifetime_flag)
1443 pr_info->adv_valid_lifetime_in_secs = ((pr_info->valid_lifetime_expires > now)) ?
1444 (pr_info->valid_lifetime_expires - now) : 0;
1446 pr_info->adv_pref_lifetime_in_secs = ((pr_info->pref_lifetime_expires > now)) ?
1447 (pr_info->pref_lifetime_expires - now) : 0;
1450 h.valid_time = clib_host_to_net_u32(pr_info->adv_valid_lifetime_in_secs);
1451 h.preferred_time = clib_host_to_net_u32(pr_info->adv_pref_lifetime_in_secs) ;
1455 clib_memcpy(&h.dst_address, &pr_info->prefix, sizeof(ip6_address_t));
1457 payload_length += sizeof( icmp6_neighbor_discovery_prefix_information_option_t);
1459 vlib_buffer_add_data (vm,
1460 p0->free_list_index,
1462 (void *)&h, sizeof(icmp6_neighbor_discovery_prefix_information_option_t));
1468 /* add additional options before here */
1470 /* finish building the router advertisement... */
1471 if (!is_unspecified && radv_info->send_unicast)
1473 ip0->dst_address = ip0->src_address;
1477 /* target address is all-nodes mcast addr */
1478 ip6_set_reserved_multicast_address
1480 IP6_MULTICAST_SCOPE_link_local,
1481 IP6_MULTICAST_GROUP_ID_all_hosts);
1484 /* source address MUST be the link-local address */
1485 ip0->src_address = radv_info->link_local_address;
1487 ip0->hop_limit = 255;
1488 ip0->payload_length =
1489 clib_host_to_net_u16 (payload_length);
1491 icmp6_router_advertisement_header_t *rh0 =
1492 (icmp6_router_advertisement_header_t *) (ip0 + 1);
1493 rh0->icmp.checksum =
1494 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
1496 ASSERT (bogus_length == 0);
1498 /* setup output if and adjacency */
1499 vnet_buffer (p0)->sw_if_index[VLIB_RX] =
1500 vnet_main.local_interface_sw_if_index;
1502 if (is_solicitation)
1504 ethernet_header_t *eth0;
1505 /* Reuse current MAC header, copy SMAC to DMAC and
1506 * interface MAC to SMAC */
1507 vlib_buffer_reset (p0);
1508 eth0 = vlib_buffer_get_current (p0);
1509 clib_memcpy (eth0->dst_address, eth0->src_address,
1511 clib_memcpy (eth0->src_address, eth_if0->address,
1514 is_dropped ? next0 :
1515 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX;
1516 vnet_buffer (p0)->sw_if_index[VLIB_TX] =
1521 adj_index0 = radv_info->all_nodes_adj_index;
1522 if (adj_index0 == 0)
1523 error0 = ICMP6_ERROR_DST_LOOKUP_MISS;
1526 ip_adjacency_t *adj0 =
1527 ip_get_adjacency (&im->lookup_main,
1530 ((adj0->rewrite_header.sw_if_index !=
1532 || adj0->lookup_next_index !=
1533 IP_LOOKUP_NEXT_REWRITE) ?
1534 ICMP6_ERROR_ROUTER_SOLICITATION_DEST_UNKNOWN
1537 is_dropped ? next0 :
1538 ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW;
1539 vnet_buffer (p0)->ip.adj_index[VLIB_TX] =
1543 p0->flags |= VNET_BUFFER_LOCALLY_ORIGINATED;
1545 radv_info->n_solicitations_dropped += is_dropped;
1546 radv_info->n_solicitations_rcvd += is_solicitation;
1548 if ((error0 == ICMP6_ERROR_NONE) && !is_dropped)
1550 radv_info->n_advertisements_sent++;
1551 n_advertisements_sent++;
1557 p0->error = error_node->errors[error0];
1559 if (error0 != ICMP6_ERROR_NONE)
1560 vlib_error_count (vm, error_node->node_index, error0, 1);
1562 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1563 to_next, n_left_to_next,
1568 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1571 /* Account for router advertisements sent. */
1572 vlib_error_count (vm, error_node->node_index,
1573 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_TX,
1574 n_advertisements_sent);
1576 return frame->n_vectors;
1579 /* validate advertised info for consistancy (see RFC-4861 section 6.2.7) - log any inconsistencies, packet will always be dropped */
1580 static_always_inline uword
1581 icmp6_router_advertisement (vlib_main_t * vm,
1582 vlib_node_runtime_t * node, vlib_frame_t * frame)
1584 vnet_main_t *vnm = vnet_get_main ();
1585 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1586 uword n_packets = frame->n_vectors;
1587 u32 *from, *to_next;
1588 u32 n_left_from, n_left_to_next, next_index;
1589 u32 n_advertisements_rcvd = 0;
1591 vlib_node_runtime_t *error_node =
1592 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
1594 from = vlib_frame_vector_args (frame);
1595 n_left_from = n_packets;
1596 next_index = node->cached_next_index;
1598 if (node->flags & VLIB_NODE_FLAG_TRACE)
1599 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
1601 sizeof (icmp6_input_trace_t));
1603 while (n_left_from > 0)
1605 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1607 while (n_left_from > 0 && n_left_to_next > 0)
1611 ip6_radv_t *radv_info = 0;
1612 icmp6_router_advertisement_header_t *h0;
1613 u32 bi0, options_len0, sw_if_index0, next0, error0;
1615 bi0 = to_next[0] = from[0];
1620 n_left_to_next -= 1;
1622 p0 = vlib_get_buffer (vm, bi0);
1623 ip0 = vlib_buffer_get_current (p0);
1624 h0 = ip6_next_header (ip0);
1626 clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
1628 error0 = ICMP6_ERROR_NONE;
1629 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
1631 /* Check that source address is link-local */
1632 error0 = (!ip6_address_is_link_local_unicast (&ip0->src_address)) ?
1633 ICMP6_ERROR_ROUTER_ADVERTISEMENT_SOURCE_NOT_LINK_LOCAL : error0;
1635 /* default is to drop */
1636 next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
1638 n_advertisements_rcvd++;
1640 if (error0 == ICMP6_ERROR_NONE)
1642 vnet_sw_interface_t *sw_if0;
1643 ethernet_interface_t *eth_if0;
1645 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1646 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
1648 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1650 /* only support ethernet interface type for now */
1652 (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
1655 if (error0 == ICMP6_ERROR_NONE)
1659 /* look up the radv_t information for this interface */
1660 vec_validate_init_empty
1661 (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
1663 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
1666 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
1670 ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
1673 if (error0 == ICMP6_ERROR_NONE)
1675 /* validate advertised information */
1676 if ((h0->current_hop_limit && radv_info->curr_hop_limit)
1677 && (h0->current_hop_limit !=
1678 radv_info->curr_hop_limit))
1680 ip6_neighbor_syslog (vm, LOG_WARNING,
1681 "our AdvCurHopLimit on %U doesn't agree with %U",
1682 format_vnet_sw_if_index_name,
1689 ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP)
1690 != radv_info->adv_managed_flag)
1692 ip6_neighbor_syslog (vm, LOG_WARNING,
1693 "our AdvManagedFlag on %U doesn't agree with %U",
1694 format_vnet_sw_if_index_name,
1701 ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP)
1702 != radv_info->adv_other_flag)
1704 ip6_neighbor_syslog (vm, LOG_WARNING,
1705 "our AdvOtherConfigFlag on %U doesn't agree with %U",
1706 format_vnet_sw_if_index_name,
1713 time_in_msec_between_retransmitted_neighbor_solicitations
1715 adv_time_in_msec_between_retransmitted_neighbor_solicitations)
1717 time_in_msec_between_retransmitted_neighbor_solicitations
1719 clib_host_to_net_u32 (radv_info->
1720 adv_time_in_msec_between_retransmitted_neighbor_solicitations)))
1722 ip6_neighbor_syslog (vm, LOG_WARNING,
1723 "our AdvRetransTimer on %U doesn't agree with %U",
1724 format_vnet_sw_if_index_name,
1730 if ((h0->neighbor_reachable_time_in_msec &&
1731 radv_info->adv_neighbor_reachable_time_in_msec) &&
1732 (h0->neighbor_reachable_time_in_msec !=
1733 clib_host_to_net_u32
1734 (radv_info->adv_neighbor_reachable_time_in_msec)))
1736 ip6_neighbor_syslog (vm, LOG_WARNING,
1737 "our AdvReachableTime on %U doesn't agree with %U",
1738 format_vnet_sw_if_index_name,
1744 /* check for MTU or prefix options or .. */
1745 u8 *opt_hdr = (u8 *) (h0 + 1);
1746 while (options_len0 > 0)
1748 icmp6_neighbor_discovery_option_header_t *o0 =
1749 (icmp6_neighbor_discovery_option_header_t *)
1751 int opt_len = o0->n_data_u64s << 3;
1752 icmp6_neighbor_discovery_option_type_t option_type =
1755 if (options_len0 < 2)
1757 ip6_neighbor_syslog (vm, LOG_ERR,
1758 "malformed RA packet on %U from %U",
1759 format_vnet_sw_if_index_name,
1768 ip6_neighbor_syslog (vm, LOG_ERR,
1769 " zero length option in RA on %U from %U",
1770 format_vnet_sw_if_index_name,
1776 else if (opt_len > options_len0)
1778 ip6_neighbor_syslog (vm, LOG_ERR,
1779 "option length in RA packet greater than total length on %U from %U",
1780 format_vnet_sw_if_index_name,
1787 options_len0 -= opt_len;
1790 switch (option_type)
1792 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu:
1794 icmp6_neighbor_discovery_mtu_option_t *h =
1795 (icmp6_neighbor_discovery_mtu_option_t
1798 if (opt_len < sizeof (*h))
1801 if ((h->mtu && radv_info->adv_link_mtu) &&
1803 clib_host_to_net_u32
1804 (radv_info->adv_link_mtu)))
1806 ip6_neighbor_syslog (vm, LOG_WARNING,
1807 "our AdvLinkMTU on %U doesn't agree with %U",
1808 format_vnet_sw_if_index_name,
1816 case ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information:
1818 icmp6_neighbor_discovery_prefix_information_option_t
1820 (icmp6_neighbor_discovery_prefix_information_option_t
1823 /* validate advertised prefix options */
1824 ip6_radv_prefix_t *pr_info;
1825 u32 preferred, valid;
1827 if (opt_len < sizeof (*h))
1831 clib_net_to_host_u32 (h->preferred_time);
1832 valid = clib_net_to_host_u32 (h->valid_time);
1834 /* look for matching prefix - if we our advertising it, it better be consistant */
1836 pool_foreach (pr_info, radv_info->adv_prefixes_pool,
1840 ip6_address_mask_from_width(&mask, pr_info->prefix_len);
1842 if(pr_info->enabled &&
1843 (pr_info->prefix_len == h->dst_address_length) &&
1844 ip6_address_is_equal_masked (&pr_info->prefix, &h->dst_address, &mask))
1847 if(!pr_info->decrement_lifetime_flag &&
1848 valid != pr_info->adv_valid_lifetime_in_secs)
1850 ip6_neighbor_syslog(vm, LOG_WARNING,
1851 "our ADV validlifetime on %U for %U does not agree with %U",
1852 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
1853 format_ip6_address, &h->dst_address);
1855 if(!pr_info->decrement_lifetime_flag &&
1856 preferred != pr_info->adv_pref_lifetime_in_secs)
1858 ip6_neighbor_syslog(vm, LOG_WARNING,
1859 "our ADV preferredlifetime on %U for %U does not agree with %U",
1860 format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
1861 format_ip6_address, &h->dst_address);
1878 p0->error = error_node->errors[error0];
1880 if (error0 != ICMP6_ERROR_NONE)
1881 vlib_error_count (vm, error_node->node_index, error0, 1);
1883 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1884 to_next, n_left_to_next,
1888 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1891 /* Account for router advertisements sent. */
1892 vlib_error_count (vm, error_node->node_index,
1893 ICMP6_ERROR_ROUTER_ADVERTISEMENTS_RX,
1894 n_advertisements_rcvd);
1896 return frame->n_vectors;
1899 /* create and initialize router advertisement parameters with default values for this intfc */
1901 ip6_neighbor_sw_interface_add_del (vnet_main_t * vnm,
1902 u32 sw_if_index, u32 is_add)
1904 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
1907 vnet_sw_interface_t *sw_if0;
1908 ethernet_interface_t *eth_if0 = 0;
1910 /* lookup radv container - ethernet interfaces only */
1911 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
1912 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
1913 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
1918 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
1920 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
1924 a = pool_elt_at_index (nm->if_radv_pool, ri);
1928 u32 i, *to_delete = 0;
1929 ip6_radv_prefix_t *p;
1930 ip6_mldp_group_t *m;
1932 /* remove adjacencies */
1933 adj_unlock (a->all_nodes_adj_index);
1934 adj_unlock (a->all_routers_adj_index);
1935 adj_unlock (a->all_mldv2_routers_adj_index);
1937 /* clean up prefix_pool */
1939 pool_foreach (p, a->adv_prefixes_pool,
1941 vec_add1 (to_delete, p - a->adv_prefixes_pool);
1945 for (i = 0; i < vec_len (to_delete); i++)
1947 p = pool_elt_at_index (a->adv_prefixes_pool, to_delete[i]);
1948 mhash_unset (&a->address_to_prefix_index, &p->prefix, 0);
1949 pool_put (a->adv_prefixes_pool, p);
1952 vec_free (to_delete);
1955 /* clean up mldp group pool */
1957 pool_foreach (m, a->mldp_group_pool,
1959 vec_add1 (to_delete, m - a->mldp_group_pool);
1963 for (i = 0; i < vec_len (to_delete); i++)
1965 m = pool_elt_at_index (a->mldp_group_pool, to_delete[i]);
1966 mhash_unset (&a->address_to_mldp_index, &m->mcast_address, 0);
1967 pool_put (a->mldp_group_pool, m);
1970 vec_free (to_delete);
1972 pool_put (nm->if_radv_pool, a);
1973 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ~0;
1981 vnet_hw_interface_t *hw_if0;
1983 hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index);
1985 pool_get (nm->if_radv_pool, a);
1987 ri = a - nm->if_radv_pool;
1988 nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ri;
1990 /* initialize default values (most of which are zero) */
1991 memset (a, 0, sizeof (a[0]));
1993 a->sw_if_index = sw_if_index;
1995 a->max_radv_interval = DEF_MAX_RADV_INTERVAL;
1996 a->min_radv_interval = DEF_MIN_RADV_INTERVAL;
1997 a->curr_hop_limit = DEF_CURR_HOP_LIMIT;
1998 a->adv_router_lifetime_in_sec = DEF_DEF_RTR_LIFETIME;
2000 a->adv_link_layer_address = 1; /* send ll address source address option */
2002 a->min_delay_between_radv = MIN_DELAY_BETWEEN_RAS;
2003 a->max_delay_between_radv = MAX_DELAY_BETWEEN_RAS;
2004 a->max_rtr_default_lifetime = MAX_DEF_RTR_LIFETIME;
2005 a->seed = (u32) clib_cpu_time_now ();
2006 (void) random_u32 (&a->seed);
2007 a->randomizer = clib_cpu_time_now ();
2008 (void) random_u64 (&a->randomizer);
2010 a->initial_adverts_count = MAX_INITIAL_RTR_ADVERTISEMENTS;
2011 a->initial_adverts_sent = a->initial_adverts_count - 1;
2012 a->initial_adverts_interval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
2014 /* deafult is to send */
2017 /* fill in radv_info for this interface that will be needed later */
2018 a->adv_link_mtu = hw_if0->max_l3_packet_bytes[VLIB_RX];
2020 clib_memcpy (a->link_layer_address, eth_if0->address, 6);
2022 /* fill in default link-local address (this may be overridden) */
2023 ip6_link_local_address_from_ethernet_address
2024 (&a->link_local_address, eth_if0->address);
2025 a->link_local_prefix_len = 64;
2027 mhash_init (&a->address_to_prefix_index, sizeof (uword),
2028 sizeof (ip6_address_t));
2029 mhash_init (&a->address_to_mldp_index, sizeof (uword),
2030 sizeof (ip6_address_t));
2033 u8 link_layer_address[6] = { 0x33, 0x33, 0x00, 0x00, 0x00,
2034 IP6_MULTICAST_GROUP_ID_all_hosts
2037 a->all_nodes_adj_index =
2038 adj_rewrite_add_and_lock (FIB_PROTOCOL_IP6, VNET_LINK_IP6,
2039 sw_if_index, link_layer_address);
2043 u8 link_layer_address[6] = { 0x33, 0x33, 0x00, 0x00, 0x00,
2044 IP6_MULTICAST_GROUP_ID_all_routers
2047 a->all_routers_adj_index =
2048 adj_rewrite_add_and_lock (FIB_PROTOCOL_IP6, VNET_LINK_IP6,
2049 sw_if_index, link_layer_address);
2053 u8 link_layer_address[6] = { 0x33, 0x33, 0x00, 0x00, 0x00,
2054 IP6_MULTICAST_GROUP_ID_mldv2_routers
2057 a->all_mldv2_routers_adj_index =
2058 adj_rewrite_add_and_lock (FIB_PROTOCOL_IP6,
2060 sw_if_index, link_layer_address);
2063 /* add multicast groups we will always be reporting */
2065 ip6_mldp_group_t *mcast_group_info;
2067 ip6_set_reserved_multicast_address (&addr,
2068 IP6_MULTICAST_SCOPE_link_local,
2069 IP6_MULTICAST_GROUP_ID_all_hosts);
2071 /* lookup mldp info for this interface */
2073 uword *p = mhash_get (&a->address_to_mldp_index, &addr);
2075 p ? pool_elt_at_index (a->mldp_group_pool, p[0]) : 0;
2078 if (!mcast_group_info)
2082 pool_get (a->mldp_group_pool, mcast_group_info);
2084 mi = mcast_group_info - a->mldp_group_pool;
2085 mhash_set (&a->address_to_mldp_index, &addr, mi, /* old_value */
2088 mcast_group_info->type = 4;
2089 mcast_group_info->mcast_source_address_pool = 0;
2090 mcast_group_info->num_sources = 0;
2091 clib_memcpy (&mcast_group_info->mcast_address, &addr,
2092 sizeof (ip6_address_t));
2095 ip6_set_reserved_multicast_address (&addr,
2096 IP6_MULTICAST_SCOPE_link_local,
2097 IP6_MULTICAST_GROUP_ID_all_routers);
2099 p = mhash_get (&a->address_to_mldp_index, &addr);
2101 p ? pool_elt_at_index (a->mldp_group_pool, p[0]) : 0;
2103 if (!mcast_group_info)
2107 pool_get (a->mldp_group_pool, mcast_group_info);
2109 mi = mcast_group_info - a->mldp_group_pool;
2110 mhash_set (&a->address_to_mldp_index, &addr, mi, /* old_value */
2113 mcast_group_info->type = 4;
2114 mcast_group_info->mcast_source_address_pool = 0;
2115 mcast_group_info->num_sources = 0;
2116 clib_memcpy (&mcast_group_info->mcast_address, &addr,
2117 sizeof (ip6_address_t));
2120 ip6_set_reserved_multicast_address (&addr,
2121 IP6_MULTICAST_SCOPE_link_local,
2122 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2124 p = mhash_get (&a->address_to_mldp_index, &addr);
2126 p ? pool_elt_at_index (a->mldp_group_pool, p[0]) : 0;
2128 if (!mcast_group_info)
2132 pool_get (a->mldp_group_pool, mcast_group_info);
2134 mi = mcast_group_info - a->mldp_group_pool;
2135 mhash_set (&a->address_to_mldp_index, &addr, mi, /* old_value */
2138 mcast_group_info->type = 4;
2139 mcast_group_info->mcast_source_address_pool = 0;
2140 mcast_group_info->num_sources = 0;
2141 clib_memcpy (&mcast_group_info->mcast_address, &addr,
2142 sizeof (ip6_address_t));
2149 /* send an mldpv2 report */
2151 ip6_neighbor_send_mldpv2_report (u32 sw_if_index)
2153 vnet_main_t *vnm = vnet_get_main ();
2154 vlib_main_t *vm = vnm->vlib_main;
2155 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2156 vnet_sw_interface_t *sw_if0;
2157 ethernet_interface_t *eth_if0;
2161 ip6_radv_t *radv_info;
2171 icmp6_multicast_listener_report_header_t *rh0;
2172 icmp6_multicast_listener_report_packet_t *rp0;
2174 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2175 ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
2176 eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2178 if (!eth_if0 || !vnet_sw_interface_is_admin_up (vnm, sw_if_index))
2181 /* look up the radv_t information for this interface */
2182 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2185 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2190 /* send report now - build a mldpv2 report packet */
2191 n_allocated = vlib_buffer_alloc_from_free_list (vm,
2194 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2195 if (PREDICT_FALSE (n_allocated == 0))
2197 clib_warning ("buffer allocation failure");
2201 b0 = vlib_get_buffer (vm, bo0);
2203 /* adjust the sizeof the buffer to just include the ipv6 header */
2204 b0->current_length = sizeof (icmp6_multicast_listener_report_packet_t);
2206 payload_length = sizeof (icmp6_multicast_listener_report_header_t);
2208 b0->error = ICMP6_ERROR_NONE;
2210 rp0 = vlib_buffer_get_current (b0);
2211 ip0 = (ip6_header_t *) & rp0->ip;
2212 rh0 = (icmp6_multicast_listener_report_header_t *) & rp0->report_hdr;
2214 memset (rp0, 0x0, sizeof (icmp6_multicast_listener_report_packet_t));
2216 ip0->ip_version_traffic_class_and_flow_label =
2217 clib_host_to_net_u32 (0x6 << 28);
2219 ip0->protocol = IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS;
2220 /* for DEBUG - vnet driver won't seem to emit router alerts */
2221 /* ip0->protocol = IP_PROTOCOL_ICMP6; */
2224 rh0->icmp.type = ICMP6_multicast_listener_report_v2;
2226 /* source address MUST be the link-local address */
2227 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2228 ip0->src_address = radv_info->link_local_address;
2230 /* destination is all mldpv2 routers */
2231 ip6_set_reserved_multicast_address (&ip0->dst_address,
2232 IP6_MULTICAST_SCOPE_link_local,
2233 IP6_MULTICAST_GROUP_ID_mldv2_routers);
2235 /* add reports here */
2236 ip6_mldp_group_t *m;
2237 int num_addr_records = 0;
2238 icmp6_multicast_address_record_t rr;
2240 /* fill in the hop-by-hop extension header (router alert) info */
2241 rh0->ext_hdr.next_hdr = IP_PROTOCOL_ICMP6;
2242 rh0->ext_hdr.n_data_u64s = 0;
2244 rh0->alert.type = IP6_MLDP_ALERT_TYPE;
2246 rh0->alert.value = 0;
2251 rh0->icmp.checksum = 0;
2254 pool_foreach (m, radv_info->mldp_group_pool,
2257 rr.aux_data_len_u32s = 0;
2258 rr.num_sources = clib_host_to_net_u16 (m->num_sources);
2259 clib_memcpy(&rr.mcast_addr, &m->mcast_address, sizeof(ip6_address_t));
2263 vlib_buffer_add_data
2264 (vm, b0->free_list_index, bo0,
2265 (void *)&rr, sizeof(icmp6_multicast_address_record_t));
2267 payload_length += sizeof( icmp6_multicast_address_record_t);
2272 rh0->num_addr_records = clib_host_to_net_u16 (num_addr_records);
2274 /* update lengths */
2275 ip0->payload_length = clib_host_to_net_u16 (payload_length);
2277 rh0->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0,
2279 ASSERT (bogus_length == 0);
2282 * OK to override w/ no regard for actual FIB, because
2283 * ip6-rewrite only looks at the adjacency.
2285 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
2286 vnet_main.local_interface_sw_if_index;
2288 vnet_buffer (b0)->ip.adj_index[VLIB_TX] =
2289 radv_info->all_mldv2_routers_adj_index;
2290 b0->flags |= VNET_BUFFER_LOCALLY_ORIGINATED;
2292 vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite");
2294 f = vlib_get_frame_to_node (vm, node->index);
2295 to_next = vlib_frame_vector_args (f);
2299 vlib_put_frame_to_node (vm, node->index, f);
2304 VLIB_REGISTER_NODE (ip6_icmp_router_solicitation_node,static) =
2306 .function = icmp6_router_solicitation,
2307 .name = "icmp6-router-solicitation",
2309 .vector_size = sizeof (u32),
2311 .format_trace = format_icmp6_input_trace,
2313 .n_next_nodes = ICMP6_ROUTER_SOLICITATION_N_NEXT,
2315 [ICMP6_ROUTER_SOLICITATION_NEXT_DROP] = "error-drop",
2316 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW] = "ip6-rewrite",
2317 [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX] = "interface-output",
2322 /* send a RA or update the timer info etc.. */
2324 ip6_neighbor_process_timer_event (vlib_main_t * vm,
2325 vlib_node_runtime_t * node,
2326 vlib_frame_t * frame)
2328 vnet_main_t *vnm = vnet_get_main ();
2329 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2330 ip6_radv_t *radv_info;
2331 vlib_frame_t *f = 0;
2332 u32 n_this_frame = 0;
2333 u32 n_left_to_next = 0;
2336 icmp6_router_solicitation_header_t *h0;
2338 f64 now = vlib_time_now (vm);
2340 /* Interface ip6 radv info list */
2342 pool_foreach (radv_info, nm->if_radv_pool,
2344 if( !vnet_sw_interface_is_admin_up (vnm, radv_info->sw_if_index))
2346 radv_info->initial_adverts_sent = radv_info->initial_adverts_count-1;
2347 radv_info->next_multicast_time = now;
2348 radv_info->last_multicast_time = now;
2349 radv_info->last_radv_time = 0;
2350 radv_info->all_routers_mcast = 0;
2354 /* Make sure that we've joined the all-routers multicast group */
2355 if(!radv_info->all_routers_mcast)
2357 /* send MDLP_REPORT_EVENT message */
2358 ip6_neighbor_send_mldpv2_report(radv_info->sw_if_index);
2359 radv_info->all_routers_mcast = 1;
2362 /* is it time to send a multicast RA on this interface? */
2363 if(radv_info->send_radv && (now >= radv_info->next_multicast_time))
2368 f64 rfn = (radv_info->max_radv_interval - radv_info->min_radv_interval) *
2369 random_f64 (&radv_info->seed) + radv_info->min_radv_interval;
2371 /* multicast send - compute next multicast send time */
2372 if( radv_info->initial_adverts_sent > 0)
2374 radv_info->initial_adverts_sent--;
2375 if(rfn > radv_info-> initial_adverts_interval)
2376 rfn = radv_info-> initial_adverts_interval;
2378 /* check to see if we are ceasing to send */
2379 if( radv_info->initial_adverts_sent == 0)
2380 if(radv_info->cease_radv)
2381 radv_info->send_radv = 0;
2384 radv_info->next_multicast_time = rfn + now;
2385 radv_info->last_multicast_time = now;
2387 /* send advert now - build a "solicted" router advert with unspecified source address */
2388 n_allocated = vlib_buffer_alloc_from_free_list
2389 (vm, &bo0, n_to_alloc, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
2391 if (PREDICT_FALSE(n_allocated == 0))
2393 clib_warning ("buffer allocation failure");
2396 b0 = vlib_get_buffer (vm, bo0);
2397 b0->current_length = sizeof( icmp6_router_solicitation_header_t);
2398 b0->error = ICMP6_ERROR_NONE;
2399 vnet_buffer (b0)->sw_if_index[VLIB_RX] = radv_info->sw_if_index;
2401 h0 = vlib_buffer_get_current (b0);
2403 memset (h0, 0, sizeof (icmp6_router_solicitation_header_t));
2405 h0->ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
2406 h0->ip.payload_length = clib_host_to_net_u16 (sizeof (icmp6_router_solicitation_header_t)
2407 - STRUCT_OFFSET_OF (icmp6_router_solicitation_header_t, neighbor));
2408 h0->ip.protocol = IP_PROTOCOL_ICMP6;
2409 h0->ip.hop_limit = 255;
2411 /* set src/dst address as "unspecified" this marks this packet as internally generated rather than recieved */
2412 h0->ip.src_address.as_u64[0] = 0;
2413 h0->ip.src_address.as_u64[1] = 0;
2415 h0->ip.dst_address.as_u64[0] = 0;
2416 h0->ip.dst_address.as_u64[1] = 0;
2418 h0->neighbor.icmp.type = ICMP6_router_solicitation;
2420 if (PREDICT_FALSE(f == 0))
2422 f = vlib_get_frame_to_node (vm, ip6_icmp_router_solicitation_node.index);
2423 to_next = vlib_frame_vector_args (f);
2424 n_left_to_next = VLIB_FRAME_SIZE;
2433 if (PREDICT_FALSE(n_left_to_next == 0))
2435 f->n_vectors = n_this_frame;
2436 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2445 ASSERT (n_this_frame);
2446 f->n_vectors = n_this_frame;
2447 vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
2453 ip6_icmp_neighbor_discovery_event_process (vlib_main_t * vm,
2454 vlib_node_runtime_t * node,
2455 vlib_frame_t * frame)
2458 ip6_icmp_neighbor_discovery_event_data_t *event_data;
2460 /* init code here */
2464 vlib_process_wait_for_event_or_clock (vm, 1. /* seconds */ );
2466 event_data = vlib_process_get_event_data (vm, &event_type);
2470 /* No events found: timer expired. */
2471 /* process interface list and send RAs as appropriate, update timer info */
2472 ip6_neighbor_process_timer_event (vm, node, frame);
2479 case ICMP6_ND_EVENT_INIT:
2490 _vec_len (event_data) = 0;
2493 return frame->n_vectors;
2497 VLIB_REGISTER_NODE (ip6_icmp_router_advertisement_node,static) =
2499 .function = icmp6_router_advertisement,
2500 .name = "icmp6-router-advertisement",
2502 .vector_size = sizeof (u32),
2504 .format_trace = format_icmp6_input_trace,
2513 vlib_node_registration_t ip6_icmp_neighbor_discovery_event_node = {
2515 .function = ip6_icmp_neighbor_discovery_event_process,
2516 .name = "ip6-icmp-neighbor-discovery-event-process",
2517 .type = VLIB_NODE_TYPE_PROCESS,
2521 icmp6_neighbor_solicitation (vlib_main_t * vm,
2522 vlib_node_runtime_t * node, vlib_frame_t * frame)
2524 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
2525 /* is_solicitation */
2530 icmp6_neighbor_advertisement (vlib_main_t * vm,
2531 vlib_node_runtime_t * node,
2532 vlib_frame_t * frame)
2534 return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
2535 /* is_solicitation */
2540 VLIB_REGISTER_NODE (ip6_icmp_neighbor_solicitation_node,static) =
2542 .function = icmp6_neighbor_solicitation,
2543 .name = "icmp6-neighbor-solicitation",
2545 .vector_size = sizeof (u32),
2547 .format_trace = format_icmp6_input_trace,
2549 .n_next_nodes = ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
2551 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP] = "error-drop",
2552 [ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY] = "interface-output",
2558 VLIB_REGISTER_NODE (ip6_icmp_neighbor_advertisement_node,static) =
2560 .function = icmp6_neighbor_advertisement,
2561 .name = "icmp6-neighbor-advertisement",
2563 .vector_size = sizeof (u32),
2565 .format_trace = format_icmp6_input_trace,
2574 /* API support functions */
2576 ip6_neighbor_ra_config (vlib_main_t * vm, u32 sw_if_index,
2577 u8 suppress, u8 managed, u8 other,
2578 u8 ll_option, u8 send_unicast, u8 cease,
2579 u8 use_lifetime, u32 lifetime,
2580 u32 initial_count, u32 initial_interval,
2581 u32 max_interval, u32 min_interval, u8 is_no)
2583 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2587 /* look up the radv_t information for this interface */
2588 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2590 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2591 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
2596 ip6_radv_t *radv_info;
2597 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2599 if ((max_interval != 0) && (min_interval == 0))
2600 min_interval = .75 * max_interval;
2604 0) ? ((is_no) ? DEF_MAX_RADV_INTERVAL : max_interval) :
2605 radv_info->max_radv_interval;
2608 0) ? ((is_no) ? DEF_MIN_RADV_INTERVAL : min_interval) :
2609 radv_info->min_radv_interval;
2612 0) ? ((is_no) ? DEF_DEF_RTR_LIFETIME : lifetime) :
2613 radv_info->adv_router_lifetime_in_sec;
2617 if (lifetime > MAX_DEF_RTR_LIFETIME)
2618 lifetime = MAX_DEF_RTR_LIFETIME;
2620 if (lifetime <= max_interval)
2621 return VNET_API_ERROR_INVALID_VALUE;
2624 if (min_interval != 0)
2626 if ((min_interval > .75 * max_interval) || (min_interval < 3))
2627 return VNET_API_ERROR_INVALID_VALUE;
2630 if ((initial_count > MAX_INITIAL_RTR_ADVERTISEMENTS) ||
2631 (initial_interval > MAX_INITIAL_RTR_ADVERT_INTERVAL))
2632 return VNET_API_ERROR_INVALID_VALUE;
2635 if "flag" is set and is_no is true then restore default value else set value corresponding to "flag"
2636 if "flag" is clear don't change corresponding value
2638 radv_info->send_radv =
2639 (suppress != 0) ? ((is_no != 0) ? 1 : 0) : radv_info->send_radv;
2640 radv_info->adv_managed_flag =
2641 (managed != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_managed_flag;
2642 radv_info->adv_other_flag =
2643 (other != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_other_flag;
2644 radv_info->adv_link_layer_address =
2646 0) ? ((is_no) ? 1 : 0) : radv_info->adv_link_layer_address;
2647 radv_info->send_unicast =
2648 (send_unicast != 0) ? ((is_no) ? 0 : 1) : radv_info->send_unicast;
2649 radv_info->cease_radv =
2650 (cease != 0) ? ((is_no) ? 0 : 1) : radv_info->cease_radv;
2652 radv_info->min_radv_interval = min_interval;
2653 radv_info->max_radv_interval = max_interval;
2654 radv_info->adv_router_lifetime_in_sec = lifetime;
2656 radv_info->initial_adverts_count =
2658 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERTISEMENTS : initial_count) :
2659 radv_info->initial_adverts_count;
2660 radv_info->initial_adverts_interval =
2661 (initial_interval !=
2662 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERT_INTERVAL : initial_interval) :
2663 radv_info->initial_adverts_interval;
2666 if ((cease != 0) && (is_no))
2667 radv_info->send_radv = 1;
2669 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
2670 radv_info->next_multicast_time = vlib_time_now (vm);
2671 radv_info->last_multicast_time = vlib_time_now (vm);
2672 radv_info->last_radv_time = 0;
2678 ip6_neighbor_ra_prefix (vlib_main_t * vm, u32 sw_if_index,
2679 ip6_address_t * prefix_addr, u8 prefix_len,
2680 u8 use_default, u32 val_lifetime, u32 pref_lifetime,
2681 u8 no_advertise, u8 off_link, u8 no_autoconfig,
2682 u8 no_onlink, u8 is_no)
2684 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2689 /* look up the radv_t information for this interface */
2690 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
2693 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2695 error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
2699 f64 now = vlib_time_now (vm);
2700 ip6_radv_t *radv_info;
2701 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2703 /* prefix info add, delete or update */
2704 ip6_radv_prefix_t *prefix;
2706 /* lookup prefix info for this address on this interface */
2707 uword *p = mhash_get (&radv_info->address_to_prefix_index, prefix_addr);
2709 prefix = p ? pool_elt_at_index (radv_info->adv_prefixes_pool, p[0]) : 0;
2715 return VNET_API_ERROR_INVALID_VALUE; /* invalid prefix */
2717 if (prefix->prefix_len != prefix_len)
2718 return VNET_API_ERROR_INVALID_VALUE_2;
2720 /* FIXME - Should the DP do this or the CP ? */
2721 /* do specific delete processing here before returning */
2722 /* try to remove from routing table */
2724 mhash_unset (&radv_info->address_to_prefix_index, prefix_addr,
2726 pool_put (radv_info->adv_prefixes_pool, prefix);
2728 radv_info->initial_adverts_sent =
2729 radv_info->initial_adverts_count - 1;
2730 radv_info->next_multicast_time = vlib_time_now (vm);
2731 radv_info->last_multicast_time = vlib_time_now (vm);
2732 radv_info->last_radv_time = 0;
2736 /* adding or changing */
2741 pool_get (radv_info->adv_prefixes_pool, prefix);
2742 pi = prefix - radv_info->adv_prefixes_pool;
2743 mhash_set (&radv_info->address_to_prefix_index, prefix_addr, pi,
2746 memset (prefix, 0x0, sizeof (ip6_radv_prefix_t));
2748 prefix->prefix_len = prefix_len;
2749 clib_memcpy (&prefix->prefix, prefix_addr, sizeof (ip6_address_t));
2751 /* initialize default values */
2752 prefix->adv_on_link_flag = 1; /* L bit set */
2753 prefix->adv_autonomous_flag = 1; /* A bit set */
2754 prefix->adv_valid_lifetime_in_secs = DEF_ADV_VALID_LIFETIME;
2755 prefix->adv_pref_lifetime_in_secs = DEF_ADV_PREF_LIFETIME;
2756 prefix->enabled = 1;
2757 prefix->decrement_lifetime_flag = 1;
2758 prefix->deprecated_prefix_flag = 1;
2762 /* FIXME - Should the DP do this or the CP ? */
2763 /* insert prefix into routing table as a connected prefix */
2772 if (prefix->prefix_len != prefix_len)
2773 return VNET_API_ERROR_INVALID_VALUE_2;
2777 /* FIXME - Should the DP do this or the CP ? */
2778 /* remove from routing table if already there */
2782 if ((val_lifetime == ~0) || (pref_lifetime == ~0))
2784 prefix->adv_valid_lifetime_in_secs = ~0;
2785 prefix->adv_pref_lifetime_in_secs = ~0;
2786 prefix->decrement_lifetime_flag = 0;
2790 prefix->adv_valid_lifetime_in_secs = val_lifetime;;
2791 prefix->adv_pref_lifetime_in_secs = pref_lifetime;
2794 /* copy remaining */
2795 prefix->enabled = !(no_advertise != 0);
2796 prefix->adv_on_link_flag = !((off_link != 0) || (no_onlink != 0));
2797 prefix->adv_autonomous_flag = !(no_autoconfig != 0);
2801 /* fill in the expiration times */
2802 prefix->valid_lifetime_expires =
2803 now + prefix->adv_valid_lifetime_in_secs;
2804 prefix->pref_lifetime_expires = now + prefix->adv_pref_lifetime_in_secs;
2806 radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
2807 radv_info->next_multicast_time = vlib_time_now (vm);
2808 radv_info->last_multicast_time = vlib_time_now (vm);
2809 radv_info->last_radv_time = 0;
2815 ip6_neighbor_cmd (vlib_main_t * vm, unformat_input_t * main_input,
2816 vlib_cli_command_t * cmd)
2818 vnet_main_t *vnm = vnet_get_main ();
2819 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
2820 clib_error_t *error = 0;
2822 u8 suppress = 0, managed = 0, other = 0;
2823 u8 suppress_ll_option = 0, send_unicast = 0, cease = 0;
2824 u8 use_lifetime = 0;
2825 u32 sw_if_index, ra_lifetime = 0, ra_initial_count =
2826 0, ra_initial_interval = 0;
2827 u32 ra_max_interval = 0, ra_min_interval = 0;
2829 unformat_input_t _line_input, *line_input = &_line_input;
2830 vnet_sw_interface_t *sw_if0;
2832 int add_radv_info = 1;
2833 __attribute__ ((unused)) ip6_radv_t *radv_info = 0;
2834 ip6_address_t ip6_addr;
2838 /* Get a line of input. */
2839 if (!unformat_user (main_input, unformat_line_input, line_input))
2842 /* get basic radv info for this interface */
2843 if (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2846 if (unformat_user (line_input,
2847 unformat_vnet_sw_interface, vnm, &sw_if_index))
2850 ethernet_interface_t *eth_if0 = 0;
2852 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
2853 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
2855 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
2860 clib_error_return (0, "Interface must be of ethernet type");
2864 /* look up the radv_t information for this interface */
2865 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
2868 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
2872 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
2876 error = clib_error_return (0, "unknown interface %U'",
2877 format_unformat_error, line_input);
2883 error = clib_error_return (0, "invalid interface name %U'",
2884 format_unformat_error, line_input);
2889 /* get the rest of the command */
2890 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2892 if (unformat (line_input, "no"))
2894 else if (unformat (line_input, "prefix %U/%d",
2895 unformat_ip6_address, &ip6_addr, &addr_len))
2900 else if (unformat (line_input, "ra-managed-config-flag"))
2905 else if (unformat (line_input, "ra-other-config-flag"))
2910 else if (unformat (line_input, "ra-suppress") ||
2911 unformat (line_input, "ra-surpress"))
2916 else if (unformat (line_input, "ra-suppress-link-layer") ||
2917 unformat (line_input, "ra-surpress-link-layer"))
2919 suppress_ll_option = 1;
2922 else if (unformat (line_input, "ra-send-unicast"))
2927 else if (unformat (line_input, "ra-lifetime"))
2929 if (!unformat (line_input, "%d", &ra_lifetime))
2930 return (error = unformat_parse_error (line_input));
2934 else if (unformat (line_input, "ra-initial"))
2937 (line_input, "%d %d", &ra_initial_count, &ra_initial_interval))
2938 return (error = unformat_parse_error (line_input));
2941 else if (unformat (line_input, "ra-interval"))
2943 if (!unformat (line_input, "%d", &ra_max_interval))
2944 return (error = unformat_parse_error (line_input));
2946 if (!unformat (line_input, "%d", &ra_min_interval))
2947 ra_min_interval = 0;
2950 else if (unformat (line_input, "ra-cease"))
2956 return (unformat_parse_error (line_input));
2961 ip6_neighbor_ra_config (vm, sw_if_index,
2962 suppress, managed, other,
2963 suppress_ll_option, send_unicast, cease,
2964 use_lifetime, ra_lifetime,
2965 ra_initial_count, ra_initial_interval,
2966 ra_max_interval, ra_min_interval, is_no);
2970 u32 valid_lifetime_in_secs = 0;
2971 u32 pref_lifetime_in_secs = 0;
2972 u8 use_prefix_default_values = 0;
2973 u8 no_advertise = 0;
2975 u8 no_autoconfig = 0;
2978 /* get the rest of the command */
2979 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2981 if (unformat (line_input, "default"))
2983 use_prefix_default_values = 1;
2986 else if (unformat (line_input, "infinite"))
2988 valid_lifetime_in_secs = ~0;
2989 pref_lifetime_in_secs = ~0;
2992 else if (unformat (line_input, "%d %d", &valid_lifetime_in_secs,
2993 &pref_lifetime_in_secs))
3000 /* get the rest of the command */
3001 while (!use_prefix_default_values &&
3002 unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
3004 if (unformat (line_input, "no-advertise"))
3006 else if (unformat (line_input, "off-link"))
3008 else if (unformat (line_input, "no-autoconfig"))
3010 else if (unformat (line_input, "no-onlink"))
3013 return (unformat_parse_error (line_input));
3016 ip6_neighbor_ra_prefix (vm, sw_if_index,
3017 &ip6_addr, addr_len,
3018 use_prefix_default_values,
3019 valid_lifetime_in_secs,
3020 pref_lifetime_in_secs,
3022 off_link, no_autoconfig, no_onlink, is_no);
3025 unformat_free (line_input);
3032 ip6_print_addrs (vlib_main_t * vm, u32 * addrs)
3034 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3037 for (i = 0; i < vec_len (addrs); i++)
3039 ip_interface_address_t *a =
3040 pool_elt_at_index (lm->if_address_pool, addrs[i]);
3041 ip6_address_t *address = ip_interface_address_get_address (lm, a);
3043 vlib_cli_output (vm, "\t\t%U/%d",
3044 format_ip6_address, address, a->address_length);
3048 static clib_error_t *
3049 show_ip6_interface_cmd (vlib_main_t * vm,
3050 unformat_input_t * input, vlib_cli_command_t * cmd)
3052 vnet_main_t *vnm = vnet_get_main ();
3053 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3054 clib_error_t *error = 0;
3059 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3063 /* look up the radv_t information for this interface */
3064 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3067 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3071 ip_lookup_main_t *lm = &ip6_main.lookup_main;
3072 ip6_radv_t *radv_info;
3073 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3075 vlib_cli_output (vm, "%U is admin %s\n",
3076 format_vnet_sw_interface_name, vnm,
3077 vnet_get_sw_interface (vnm, sw_if_index),
3078 (vnet_sw_interface_is_admin_up (vnm, sw_if_index) ?
3082 u32 *link_scope = 0, *global_scope = 0;
3083 u32 *local_scope = 0, *unknown_scope = 0;
3084 ip_interface_address_t *a;
3086 vec_validate_init_empty (lm->if_address_pool_index_by_sw_if_index,
3088 ai = lm->if_address_pool_index_by_sw_if_index[sw_if_index];
3090 while (ai != (u32) ~ 0)
3092 a = pool_elt_at_index (lm->if_address_pool, ai);
3093 ip6_address_t *address =
3094 ip_interface_address_get_address (lm, a);
3096 if (ip6_address_is_link_local_unicast (address))
3097 vec_add1 (link_scope, ai);
3098 else if (ip6_address_is_global_unicast (address))
3099 vec_add1 (global_scope, ai);
3100 else if (ip6_address_is_local_unicast (address))
3101 vec_add1 (local_scope, ai);
3103 vec_add1 (unknown_scope, ai);
3105 ai = a->next_this_sw_interface;
3108 if (vec_len (link_scope))
3110 vlib_cli_output (vm, "\tLink-local address(es):\n");
3111 ip6_print_addrs (vm, link_scope);
3112 vec_free (link_scope);
3115 if (vec_len (local_scope))
3117 vlib_cli_output (vm, "\tLocal unicast address(es):\n");
3118 ip6_print_addrs (vm, local_scope);
3119 vec_free (local_scope);
3122 if (vec_len (global_scope))
3124 vlib_cli_output (vm, "\tGlobal unicast address(es):\n");
3125 ip6_print_addrs (vm, global_scope);
3126 vec_free (global_scope);
3129 if (vec_len (unknown_scope))
3131 vlib_cli_output (vm, "\tOther-scope address(es):\n");
3132 ip6_print_addrs (vm, unknown_scope);
3133 vec_free (unknown_scope);
3136 vlib_cli_output (vm, "\tJoined group address(es):\n");
3137 ip6_mldp_group_t *m;
3139 pool_foreach (m, radv_info->mldp_group_pool,
3141 vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
3146 vlib_cli_output (vm, "\tAdvertised Prefixes:\n");
3147 ip6_radv_prefix_t *p;
3149 pool_foreach (p, radv_info->adv_prefixes_pool,
3151 vlib_cli_output (vm, "\t\tprefix %U, length %d\n",
3152 format_ip6_address, &p->prefix, p->prefix_len);
3156 vlib_cli_output (vm, "\tMTU is %d\n", radv_info->adv_link_mtu);
3157 vlib_cli_output (vm, "\tICMP error messages are unlimited\n");
3158 vlib_cli_output (vm, "\tICMP redirects are disabled\n");
3159 vlib_cli_output (vm, "\tICMP unreachables are not sent\n");
3160 vlib_cli_output (vm, "\tND DAD is disabled\n");
3161 //vlib_cli_output (vm, "\tND reachable time is %d milliseconds\n",);
3162 vlib_cli_output (vm, "\tND advertised reachable time is %d\n",
3163 radv_info->adv_neighbor_reachable_time_in_msec);
3164 vlib_cli_output (vm,
3165 "\tND advertised retransmit interval is %d (msec)\n",
3167 adv_time_in_msec_between_retransmitted_neighbor_solicitations);
3169 u32 ra_interval = radv_info->max_radv_interval;
3170 u32 ra_interval_min = radv_info->min_radv_interval;
3171 vlib_cli_output (vm,
3172 "\tND router advertisements are sent every %d seconds (min interval is %d)\n",
3173 ra_interval, ra_interval_min);
3174 vlib_cli_output (vm,
3175 "\tND router advertisements live for %d seconds\n",
3176 radv_info->adv_router_lifetime_in_sec);
3177 vlib_cli_output (vm,
3178 "\tHosts %s stateless autoconfig for addresses\n",
3179 (radv_info->adv_managed_flag) ? "use" :
3181 vlib_cli_output (vm, "\tND router advertisements sent %d\n",
3182 radv_info->n_advertisements_sent);
3183 vlib_cli_output (vm, "\tND router solicitations received %d\n",
3184 radv_info->n_solicitations_rcvd);
3185 vlib_cli_output (vm, "\tND router solicitations dropped %d\n",
3186 radv_info->n_solicitations_dropped);
3190 error = clib_error_return (0, "IPv6 not enabled on interface",
3191 format_unformat_error, input);
3199 * This command is used to display various IPv6 attributes on a given
3203 * Example of how to display IPv6 settings:
3204 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
3205 * GigabitEthernet2/0/0 is admin up
3206 * Link-local address(es):
3208 * Joined group address(es):
3213 * Advertised Prefixes:
3214 * prefix fe80::fe:28ff:fe9c:75b3, length 64
3216 * ICMP error messages are unlimited
3217 * ICMP redirects are disabled
3218 * ICMP unreachables are not sent
3219 * ND DAD is disabled
3220 * ND advertised reachable time is 0
3221 * ND advertised retransmit interval is 0 (msec)
3222 * ND router advertisements are sent every 200 seconds (min interval is 150)
3223 * ND router advertisements live for 600 seconds
3224 * Hosts use stateless autoconfig for addresses
3225 * ND router advertisements sent 19336
3226 * ND router solicitations received 0
3227 * ND router solicitations dropped 0
3229 * Example of output if IPv6 is not enabled on the interface:
3230 * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
3231 * show ip6 interface: IPv6 not enabled on interface
3235 VLIB_CLI_COMMAND (show_ip6_interface_command, static) =
3237 .path = "show ip6 interface",
3238 .function = show_ip6_interface_cmd,
3239 .short_help = "show ip6 interface <interface>",
3244 disable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
3246 clib_error_t *error = 0;
3247 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3250 /* look up the radv_t information for this interface */
3251 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3253 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3255 /* if not created - do nothing */
3258 vnet_main_t *vnm = vnet_get_main ();
3259 ip6_radv_t *radv_info;
3261 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3263 /* check radv_info ref count for other ip6 addresses on this interface */
3264 if (radv_info->ref_count == 0)
3266 /* essentially "disables" ipv6 on this interface */
3267 error = ip6_add_del_interface_address (vm, sw_if_index,
3271 link_local_prefix_len,
3274 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index,
3282 ip6_interface_enabled (vlib_main_t * vm, u32 sw_if_index)
3284 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3287 /* look up the radv_t information for this interface */
3288 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3291 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3297 enable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
3299 clib_error_t *error = 0;
3300 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3304 /* look up the radv_t information for this interface */
3305 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
3308 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3310 /* if not created yet */
3313 vnet_main_t *vnm = vnet_get_main ();
3314 vnet_sw_interface_t *sw_if0;
3316 sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
3317 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
3319 ethernet_interface_t *eth_if0;
3322 ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
3325 /* create radv_info. for this interface. This holds all the info needed for router adverts */
3327 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, is_add);
3331 ip6_radv_t *radv_info;
3332 ip6_address_t link_local_address;
3334 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3336 ip6_link_local_address_from_ethernet_mac_address
3337 (&link_local_address, eth_if0->address);
3339 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index);
3340 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_SUB)
3342 /* make up an interface id */
3346 link_local_address.as_u64[0] = radv_info->randomizer;
3349 md5_add (&m, &link_local_address, 16);
3350 md5_finish (&m, digest);
3352 clib_memcpy (&link_local_address, digest, 16);
3354 radv_info->randomizer = link_local_address.as_u64[0];
3356 link_local_address.as_u64[0] =
3357 clib_host_to_net_u64 (0xFE80000000000000ULL);
3359 link_local_address.as_u8[8] &= 0xfd;
3362 /* essentially "enables" ipv6 on this interface */
3363 error = ip6_add_del_interface_address (vm, sw_if_index,
3364 &link_local_address,
3366 /* address width */ ,
3370 ip6_neighbor_sw_interface_add_del (vnm, sw_if_index,
3374 radv_info->link_local_address = link_local_address;
3375 radv_info->link_local_prefix_len = 64;
3384 static clib_error_t *
3385 enable_ip6_interface_cmd (vlib_main_t * vm,
3386 unformat_input_t * input, vlib_cli_command_t * cmd)
3388 vnet_main_t *vnm = vnet_get_main ();
3389 clib_error_t *error = 0;
3394 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3396 enable_ip6_interface (vm, sw_if_index);
3400 error = clib_error_return (0, "unknown interface\n'",
3401 format_unformat_error, input);
3408 * This command is used to enable IPv6 on a given interface.
3411 * Example of how enable IPv6 on a given interface:
3412 * @cliexcmd{enable ip6 interface GigabitEthernet2/0/0}
3415 VLIB_CLI_COMMAND (enable_ip6_interface_command, static) =
3417 .path = "enable ip6 interface",
3418 .function = enable_ip6_interface_cmd,
3419 .short_help = "enable ip6 interface <interface>",
3423 static clib_error_t *
3424 disable_ip6_interface_cmd (vlib_main_t * vm,
3425 unformat_input_t * input, vlib_cli_command_t * cmd)
3427 vnet_main_t *vnm = vnet_get_main ();
3428 clib_error_t *error = 0;
3433 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3435 error = disable_ip6_interface (vm, sw_if_index);
3439 error = clib_error_return (0, "unknown interface\n'",
3440 format_unformat_error, input);
3447 * This command is used to disable IPv6 on a given interface.
3450 * Example of how disable IPv6 on a given interface:
3451 * @cliexcmd{disable ip6 interface GigabitEthernet2/0/0}
3454 VLIB_CLI_COMMAND (disable_ip6_interface_command, static) =
3456 .path = "disable ip6 interface",
3457 .function = disable_ip6_interface_cmd,
3458 .short_help = "disable ip6 interface <interface>",
3463 * This command is used to configure the neighbor discovery
3464 * parameters on a given interface. Use the '<em>show ip6 interface</em>'
3465 * command to display some of the current neighbor discovery parameters
3466 * on a given interface. This command has three formats:
3469 * <b>Format 1 - Router Advertisement Options:</b> (Only one can be entered in a single command)
3471 * '<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>'
3475 * <em>[no] ra-managed-config-flag</em> - Advertises in ICMPv6
3476 * router-advertisement messages to use stateful address
3477 * auto-configuration to obtain address information (sets the M-bit).
3478 * Default is the M-bit is not set and the '<em>no</em>' option
3479 * returns it to this default state.
3481 * <em>[no] ra-other-config-flag</em> - Indicates in ICMPv6
3482 * router-advertisement messages that hosts use stateful auto
3483 * configuration to obtain nonaddress related information (sets
3484 * the O-bit). Default is the O-bit is not set and the '<em>no</em>'
3485 * option returns it to this default state.
3487 * <em>[no] ra-suppress</em> - Disables sending ICMPv6 router-advertisement
3488 * messages. The '<em>no</em>' option implies to enable sending ICMPv6
3489 * router-advertisement messages.
3491 * <em>[no] ra-suppress-link-layer</em> - Indicates not to include the
3492 * optional source link-layer address in the ICMPv6 router-advertisement
3493 * messages. Default is to include the optional source link-layer address
3494 * and the '<em>no</em>' option returns it to this default state.
3496 * <em>[no] ra-send-unicast</em> - Use the source address of the
3497 * router-solicitation message if availiable. The default is to use
3498 * multicast address of all nodes, and the '<em>no</em>' option returns
3499 * it to this default state.
3501 * <em>[no] ra-lifetime <lifetime></em> - Advertises the lifetime of a
3502 * default router in ICMPv6 router-advertisement messages. The range is
3503 * from 0 to 9000 seconds. '<em><lifetime></em>' must be greater than
3504 * '<em><max-interval></em>'. The default value is 600 seconds and the
3505 * '<em>no</em>' option returns it to this default value.
3507 * <em>[no] ra-initial <cnt> <interval></em> - Number of initial ICMPv6
3508 * router-advertisement messages sent and the interval between each
3509 * message. Range for count is 1 - 3 and default is 3. Range for interval
3510 * is 1 to 16 seconds, and default is 16 seconds. The '<em>no</em>' option
3511 * returns both to their default value.
3513 * <em>[no] ra-interval <max-interval> [<min-interval>]</em> - Configures the
3514 * interval between sending ICMPv6 router-advertisement messages. The
3515 * range for max-interval is from 4 to 200 seconds. min-interval can not
3516 * be more than 75% of max-interval. If not set, min-interval will be
3517 * set to 75% of max-interval. The range for min-interval is from 3 to
3518 * 150 seconds. The '<em>no</em>' option returns both to their default
3521 * <em>[no] ra-cease</em> - Cease sending ICMPv6 router-advertisement messages.
3522 * The '<em>no</em>' options implies to start (or restart) sending
3523 * ICMPv6 router-advertisement messages.
3526 * <b>Format 2 - Prefix Options:</b>
3528 * '<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>'
3532 * <em>no</em> - All additional flags are ignored and the prefix is deleted.
3534 * <em><valid-lifetime> <pref-lifetime></em> - '<em><valid-lifetime></em>' is the
3535 * length of time in seconds during what the prefix is valid for the purpose of
3536 * on-link determination. Range is 7203 to 2592000 seconds and default is 2592000
3537 * seconds (30 days). '<em><pref-lifetime></em>' is the prefered-lifetime and is the
3538 * length of time in seconds during what addresses generated from the prefix remain
3539 * preferred. Range is 0 to 604800 seconds and default is 604800 seconds (7 days).
3541 * <em>infinite</em> - Both '<em><valid-lifetime></em>' and '<em><<pref-lifetime></em>'
3542 * are inifinte, no timeout.
3544 * <em>no-advertise</em> - Do not send full router address in prefix
3545 * advertisement. Default is to advertise (i.e. - This flag is off by default).
3547 * <em>off-link</em> - Prefix is off-link, clear L-bit in packet. Default is on-link
3548 * (i.e. - This flag is off and L-bit in packet is set by default and this prefix can
3549 * be used for on-link determination). '<em>no-onlink</em>' also controls the L-bit.
3551 * <em>no-autoconfig</em> - Do not use prefix for autoconfiguration, clear A-bit in packet.
3552 * Default is autoconfig (i.e. - This flag is off and A-bit in packet is set by default.
3554 * <em>no-onlink</em> - Do not use prefix for onlink determination, clear L-bit in packet.
3555 * Default is on-link (i.e. - This flag is off and L-bit in packet is set by default and
3556 * this prefix can be used for on-link determination). '<em>off-link</em>' also controls
3560 * <b>Format 3: - Default of Prefix:</b>
3562 * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> default</b></em>'
3564 * When a new prefix is added (or existing one is being overwritten) <em>default</em>
3565 * uses default values for the prefix. If <em>no</em> is used, the <em>default</em>
3566 * is ignored and the prefix is deleted.
3570 * Example of how set a router advertisement option:
3571 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 ra-interval 100 20}
3572 * Example of how to add a prefix:
3573 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 prefix fe80::fe:28ff:fe9c:75b3/64 infinite no-advertise}
3574 * Example of how to delete a prefix:
3575 * @cliexcmd{ip6 nd GigabitEthernet2/0/0 no prefix fe80::fe:28ff:fe9c:75b3/64}
3578 VLIB_CLI_COMMAND (ip6_nd_command, static) =
3581 .short_help = "ip6 nd <interface> ...",
3582 .function = ip6_neighbor_cmd,
3587 set_ip6_link_local_address (vlib_main_t * vm,
3589 ip6_address_t * address, u8 address_length)
3591 clib_error_t *error = 0;
3592 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3594 ip6_radv_t *radv_info;
3595 vnet_main_t *vnm = vnet_get_main ();
3597 if (!ip6_address_is_link_local_unicast (address))
3599 vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_LINK_LOCAL;
3600 return (error = clib_error_return (0, "address not link-local",
3601 format_unformat_error));
3604 /* call enable ipv6 */
3605 enable_ip6_interface (vm, sw_if_index);
3607 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3611 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3613 /* save if link local address (overwrite default) */
3615 /* delete the old one */
3616 error = ip6_add_del_interface_address (vm, sw_if_index,
3617 &radv_info->link_local_address,
3618 radv_info->link_local_prefix_len
3619 /* address width */ ,
3624 /* add the new one */
3625 error = ip6_add_del_interface_address (vm, sw_if_index,
3626 address, address_length
3627 /* address width */ ,
3632 radv_info->link_local_address = *address;
3633 radv_info->link_local_prefix_len = address_length;
3639 vnm->api_errno = VNET_API_ERROR_IP6_NOT_ENABLED;
3640 error = clib_error_return (0, "ip6 not enabled for interface",
3641 format_unformat_error);
3647 set_ip6_link_local_address_cmd (vlib_main_t * vm,
3648 unformat_input_t * input,
3649 vlib_cli_command_t * cmd)
3651 vnet_main_t *vnm = vnet_get_main ();
3652 clib_error_t *error = 0;
3654 ip6_address_t ip6_addr;
3657 if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
3659 /* get the rest of the command */
3660 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
3662 if (unformat (input, "%U/%d",
3663 unformat_ip6_address, &ip6_addr, &addr_len))
3666 return (unformat_parse_error (input));
3669 error = set_ip6_link_local_address (vm, sw_if_index, &ip6_addr, addr_len);
3674 * This command is used to assign an IPv6 Link-local address to an
3675 * interface. This command will enable IPv6 on an interface if it
3676 * is not already enabled. Use the '<em>show ip6 interface</em>' command
3677 * to display the assigned Link-local address.
3680 * Example of how to assign an IPv6 Link-local address to an interface:
3681 * @cliexcmd{set ip6 link-local address GigabitEthernet2/0/0 FE80::AB8/64}
3684 VLIB_CLI_COMMAND (set_ip6_link_local_address_command, static) =
3686 .path = "set ip6 link-local address",
3687 .short_help = "set ip6 link-local address <interface> <ip6-address>/<width>",
3688 .function = set_ip6_link_local_address_cmd,
3692 /* callback when an interface address is added or deleted */
3694 ip6_neighbor_add_del_interface_address (ip6_main_t * im,
3697 ip6_address_t * address,
3699 u32 if_address_index, u32 is_delete)
3701 vnet_main_t *vnm = vnet_get_main ();
3702 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3704 vlib_main_t *vm = vnm->vlib_main;
3705 ip6_radv_t *radv_info;
3707 ip6_mldp_group_t *mcast_group_info;
3709 /* create solicited node multicast address for this interface adddress */
3710 ip6_set_solicited_node_multicast_address (&a, 0);
3712 a.as_u8[0xd] = address->as_u8[0xd];
3713 a.as_u8[0xe] = address->as_u8[0xe];
3714 a.as_u8[0xf] = address->as_u8[0xf];
3718 /* try to create radv_info - does nothing if ipv6 already enabled */
3719 enable_ip6_interface (vm, sw_if_index);
3721 /* look up the radv_t information for this interface */
3722 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3724 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3728 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3731 if (!ip6_address_is_link_local_unicast (address))
3732 radv_info->ref_count++;
3734 /* lookup prefix info for this address on this interface */
3735 uword *p = mhash_get (&radv_info->address_to_mldp_index, &a);
3737 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
3739 /* add -solicted node multicast address */
3740 if (!mcast_group_info)
3744 pool_get (radv_info->mldp_group_pool, mcast_group_info);
3746 mi = mcast_group_info - radv_info->mldp_group_pool;
3747 mhash_set (&radv_info->address_to_mldp_index, &a, mi,
3750 mcast_group_info->type = 4;
3751 mcast_group_info->mcast_source_address_pool = 0;
3752 mcast_group_info->num_sources = 0;
3753 clib_memcpy (&mcast_group_info->mcast_address, &a,
3754 sizeof (ip6_address_t));
3762 /* look up the radv_t information for this interface */
3763 vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
3765 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
3769 radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
3771 /* lookup prefix info for this address on this interface */
3772 uword *p = mhash_get (&radv_info->address_to_mldp_index, &a);
3774 p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
3776 if (mcast_group_info)
3778 mhash_unset (&radv_info->address_to_mldp_index, &a,
3780 pool_put (radv_info->mldp_group_pool, mcast_group_info);
3783 /* if interface up send MLDP "report" */
3784 radv_info->all_routers_mcast = 0;
3787 if (!ip6_address_is_link_local_unicast (address))
3788 radv_info->ref_count--;
3794 ip6_set_neighbor_limit (u32 neighbor_limit)
3796 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3798 nm->limit_neighbor_cache_size = neighbor_limit;
3802 static clib_error_t *
3803 ip6_neighbor_init (vlib_main_t * vm)
3805 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3806 ip6_main_t *im = &ip6_main;
3808 mhash_init (&nm->neighbor_index_by_key,
3809 /* value size */ sizeof (uword),
3810 /* key size */ sizeof (ip6_neighbor_key_t));
3812 icmp6_register_type (vm, ICMP6_neighbor_solicitation,
3813 ip6_icmp_neighbor_solicitation_node.index);
3814 icmp6_register_type (vm, ICMP6_neighbor_advertisement,
3815 ip6_icmp_neighbor_advertisement_node.index);
3816 icmp6_register_type (vm, ICMP6_router_solicitation,
3817 ip6_icmp_router_solicitation_node.index);
3818 icmp6_register_type (vm, ICMP6_router_advertisement,
3819 ip6_icmp_router_advertisement_node.index);
3821 /* handler node for ip6 neighbor discovery events and timers */
3822 vlib_register_node (vm, &ip6_icmp_neighbor_discovery_event_node);
3824 /* add call backs */
3825 ip6_add_del_interface_address_callback_t cb;
3826 memset (&cb, 0x0, sizeof (ip6_add_del_interface_address_callback_t));
3828 /* when an interface address changes... */
3829 cb.function = ip6_neighbor_add_del_interface_address;
3830 cb.function_opaque = 0;
3831 vec_add1 (im->add_del_interface_address_callbacks, cb);
3833 mhash_init (&nm->pending_resolutions_by_address,
3834 /* value size */ sizeof (uword),
3835 /* key size */ sizeof (ip6_address_t));
3837 mhash_init (&nm->mac_changes_by_address,
3838 /* value size */ sizeof (uword),
3839 /* key size */ sizeof (ip6_address_t));
3841 /* default, configurable */
3842 nm->limit_neighbor_cache_size = 50000;
3845 /* $$$$ Hack fix for today */
3846 vec_validate_init_empty
3847 (im->discover_neighbor_next_index_by_hw_if_index, 32, 0 /* drop */ );
3853 VLIB_INIT_FUNCTION (ip6_neighbor_init);
3857 vnet_register_ip6_neighbor_resolution_event (vnet_main_t * vnm,
3860 uword type_opaque, uword data)
3862 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3863 ip6_address_t *address = address_arg;
3865 pending_resolution_t *pr;
3867 pool_get (nm->pending_resolutions, pr);
3869 pr->next_index = ~0;
3870 pr->node_index = node_index;
3871 pr->type_opaque = type_opaque;
3874 p = mhash_get (&nm->pending_resolutions_by_address, address);
3877 /* Insert new resolution at the head of the list */
3878 pr->next_index = p[0];
3879 mhash_unset (&nm->pending_resolutions_by_address, address, 0);
3882 mhash_set (&nm->pending_resolutions_by_address, address,
3883 pr - nm->pending_resolutions, 0 /* old value */ );
3887 vnet_add_del_ip6_nd_change_event (vnet_main_t * vnm,
3888 void *data_callback,
3892 uword type_opaque, uword data, int is_add)
3894 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3895 ip6_address_t *address = address_arg;
3897 pending_resolution_t *mc;
3898 void (*fp) (u32, u8 *) = data_callback;
3902 pool_get (nm->mac_changes, mc);
3904 mc->next_index = ~0;
3905 mc->node_index = node_index;
3906 mc->type_opaque = type_opaque;
3908 mc->data_callback = data_callback;
3911 p = mhash_get (&nm->mac_changes_by_address, address);
3914 /* Insert new resolution at the head of the list */
3915 mc->next_index = p[0];
3916 mhash_unset (&nm->mac_changes_by_address, address, 0);
3919 mhash_set (&nm->mac_changes_by_address, address,
3920 mc - nm->mac_changes, 0);
3926 pending_resolution_t *mc_last = 0;
3928 p = mhash_get (&nm->mac_changes_by_address, address);
3930 return VNET_API_ERROR_NO_SUCH_ENTRY;
3934 while (index != (u32) ~ 0)
3936 mc = pool_elt_at_index (nm->mac_changes, index);
3937 if (mc->node_index == node_index &&
3938 mc->type_opaque == type_opaque && mc->pid == pid)
3940 /* Clients may need to clean up pool entries, too */
3942 (*fp) (mc->data, 0 /* no new mac addrs */ );
3945 mhash_unset (&nm->mac_changes_by_address, address, 0);
3946 if (mc->next_index != ~0)
3947 mhash_set (&nm->mac_changes_by_address, address,
3949 pool_put (nm->mac_changes, mc);
3955 mc_last->next_index = mc->next_index;
3956 pool_put (nm->mac_changes, mc);
3961 index = mc->next_index;
3964 return VNET_API_ERROR_NO_SUCH_ENTRY;
3969 vnet_ip6_nd_term (vlib_main_t * vm,
3970 vlib_node_runtime_t * node,
3972 ethernet_header_t * eth,
3973 ip6_header_t * ip, u32 sw_if_index, u16 bd_index, u8 shg)
3975 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
3976 icmp6_neighbor_solicitation_or_advertisement_header_t *ndh;
3977 pending_resolution_t *mc;
3980 ndh = ip6_next_header (ip);
3981 if (ndh->icmp.type != ICMP6_neighbor_solicitation &&
3982 ndh->icmp.type != ICMP6_neighbor_advertisement)
3985 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
3986 (p0->flags & VLIB_BUFFER_IS_TRACED)))
3988 u8 *t0 = vlib_add_trace (vm, node, p0,
3989 sizeof (icmp6_input_trace_t));
3990 clib_memcpy (t0, ip, sizeof (icmp6_input_trace_t));
3993 /* Check if anyone want ND events for L2 BDs */
3994 p = mhash_get (&nm->mac_changes_by_address, &ip6a_zero);
3995 if (p && shg == 0 && /* Only SHG 0 interface which is more likely local */
3996 !ip6_address_is_link_local_unicast (&ip->src_address))
3998 u32 next_index = p[0];
3999 while (next_index != (u32) ~ 0)
4001 int (*fp) (u32, u8 *, u32, ip6_address_t *);
4003 mc = pool_elt_at_index (nm->mac_changes, next_index);
4004 fp = mc->data_callback;
4005 /* Call the callback, return 1 to suppress dup events */
4007 rv = (*fp) (mc->data,
4008 eth->src_address, sw_if_index, &ip->src_address);
4009 /* Signal the resolver process */
4011 vlib_process_signal_event (vm, mc->node_index,
4012 mc->type_opaque, mc->data);
4013 next_index = mc->next_index;
4017 /* Check if MAC entry exsist for solicited target IP */
4018 if (ndh->icmp.type == ICMP6_neighbor_solicitation)
4020 icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *opt;
4021 l2_bridge_domain_t *bd_config;
4024 opt = (void *) (ndh + 1);
4025 if ((opt->header.type !=
4026 ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address) ||
4027 (opt->header.n_data_u64s != 1))
4028 return 0; /* source link layer address option not present */
4030 bd_config = vec_elt_at_index (l2input_main.bd_configs, bd_index);
4032 (u8 *) hash_get_mem (bd_config->mac_by_ip6, &ndh->target_address);
4034 { /* found ip-mac entry, generate eighbor advertisement response */
4036 vlib_node_runtime_t *error_node =
4037 vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
4038 ip->dst_address = ip->src_address;
4039 ip->src_address = ndh->target_address;
4040 ip->hop_limit = 255;
4042 ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
4043 clib_memcpy (opt->ethernet_address, macp, 6);
4044 ndh->icmp.type = ICMP6_neighbor_advertisement;
4045 ndh->advertisement_flags = clib_host_to_net_u32
4046 (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED |
4047 ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
4048 ndh->icmp.checksum = 0;
4049 ndh->icmp.checksum =
4050 ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip, &bogus_length);
4051 clib_memcpy (eth->dst_address, eth->src_address, 6);
4052 clib_memcpy (eth->src_address, macp, 6);
4053 vlib_error_count (vm, error_node->node_index,
4054 ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX, 1);
4064 ethernet_ndp_change_mac (u32 sw_if_index)
4066 ip6_neighbor_main_t *nm = &ip6_neighbor_main;
4070 pool_foreach (n, nm->neighbor_pool,
4072 if (n->key.sw_if_index == sw_if_index)
4074 adj_nbr_walk_nh6 (sw_if_index,
4075 &n->key.ip6_address,
4076 ip6_nd_mk_complete_walk, n);
4083 * fd.io coding-style-patch-verification: ON
4086 * eval: (c-set-style "gnu")