Line data Source code
1 : /*
2 : * ip/ip6_neighbor.c: IP6 neighbor handling
3 : *
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:
8 : *
9 : * http://www.apache.org/licenses/LICENSE-2.0
10 : *
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.
16 : */
17 :
18 : #include <vnet/ip6-nd/ip6_ra.h>
19 :
20 : #include <vnet/ip/ip.h>
21 : #include <vnet/ip-neighbor/ip_neighbor_dp.h>
22 :
23 : #include <vnet/fib/ip6_fib.h>
24 : #include <vnet/ip/ip6_link.h>
25 :
26 : /**
27 : * @file
28 : * @brief IPv6 Router Advertisements.
29 : *
30 : * The files contains the API and CLI code for managing IPv6 RAs
31 : */
32 :
33 : /* *INDENT-OFF* */
34 : /* Router solicitation packet format for ethernet. */
35 : typedef CLIB_PACKED (struct
36 : {
37 : ip6_header_t ip;
38 : icmp6_neighbor_discovery_header_t neighbor;
39 : icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
40 : link_layer_option;
41 : }) icmp6_router_solicitation_header_t;
42 :
43 : /* router advertisement packet format for ethernet. */
44 : typedef CLIB_PACKED (struct
45 : {
46 : ip6_header_t ip;
47 : icmp6_router_advertisement_header_t router;
48 : icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
49 : link_layer_option;
50 : icmp6_neighbor_discovery_mtu_option_t mtu_option;
51 : icmp6_neighbor_discovery_prefix_information_option_t
52 : prefix[0];
53 : }) icmp6_router_advertisement_packet_t;
54 : /* *INDENT-ON* */
55 :
56 : #define DEF_MAX_RADV_INTERVAL 200
57 : #define DEF_MIN_RADV_INTERVAL .75 * DEF_MAX_RADV_INTERVAL
58 : #define DEF_CURR_HOP_LIMIT 64
59 : #define DEF_DEF_RTR_LIFETIME 3 * DEF_MAX_RADV_INTERVAL
60 : #define MAX_DEF_RTR_LIFETIME 9000
61 :
62 : #define MAX_INITIAL_RTR_ADVERT_INTERVAL 16 /* seconds */
63 : #define MAX_INITIAL_RTR_ADVERTISEMENTS 3 /*transmissions */
64 : #define MIN_DELAY_BETWEEN_RAS 3 /* seconds */
65 : #define MAX_DELAY_BETWEEN_RAS 1800 /* seconds */
66 : #define MAX_RA_DELAY_TIME .5 /* seconds */
67 :
68 : static ip6_link_delegate_id_t ip6_ra_delegate_id;
69 : static ip6_ra_t *ip6_ra_pool;
70 :
71 :
72 : /* vector of registered RA report listeners */
73 : static ip6_ra_report_notify_t *ip6_ra_listeners;
74 :
75 : static int ip6_ra_publish (ip6_ra_report_t * r);
76 :
77 : void
78 560 : ip6_ra_report_register (ip6_ra_report_notify_t fn)
79 : {
80 : ip6_ra_report_notify_t *listener;
81 561 : vec_foreach (listener, ip6_ra_listeners)
82 : {
83 1 : if (*listener == fn)
84 0 : return;
85 : }
86 :
87 560 : vec_add1 (ip6_ra_listeners, fn);
88 : }
89 :
90 : void
91 0 : ip6_ra_report_unregister (ip6_ra_report_notify_t fn)
92 : {
93 : u32 ii;
94 :
95 0 : vec_foreach_index (ii, ip6_ra_listeners)
96 : {
97 0 : if (ip6_ra_listeners[ii] == fn)
98 : {
99 0 : vec_del1 (ip6_ra_listeners, ii);
100 0 : break;
101 : }
102 : }
103 0 : }
104 :
105 : ip6_ra_t *
106 1948 : ip6_ra_get_itf (u32 sw_if_index)
107 : {
108 : index_t rai;
109 :
110 1948 : rai = ip6_link_delegate_get (sw_if_index, ip6_ra_delegate_id);
111 :
112 1948 : if (INDEX_INVALID != rai)
113 1946 : return (pool_elt_at_index (ip6_ra_pool, rai));
114 :
115 2 : return (NULL);
116 : }
117 :
118 : u8
119 1638 : ip6_ra_adv_enabled (u32 sw_if_index)
120 : {
121 : ip6_ra_t *ra;
122 :
123 1638 : ra = ip6_ra_get_itf (sw_if_index);
124 :
125 1638 : return ((ra != NULL) && (ra->send_radv != 0));
126 : }
127 :
128 : void
129 1 : ip6_ra_itf_walk (ip6_ra_itf_walk_fn_t fn, void *ctx)
130 : {
131 : ip6_ra_t *radv_info;
132 :
133 6 : pool_foreach (radv_info, ip6_ra_pool)
134 : {
135 5 : if (WALK_STOP == fn (radv_info->sw_if_index, ctx))
136 0 : break;
137 : }
138 1 : }
139 :
140 : /* for "syslogging" - use elog for now */
141 : #define foreach_log_level \
142 : _ (DEBUG, "DEBUG") \
143 : _ (INFO, "INFORMATION") \
144 : _ (NOTICE, "NOTICE") \
145 : _ (WARNING, "WARNING") \
146 : _ (ERR, "ERROR") \
147 : _ (CRIT, "CRITICAL") \
148 : _ (ALERT, "ALERT") \
149 : _ (EMERG, "EMERGENCY")
150 :
151 : typedef enum
152 : {
153 : #define _(f,s) LOG_##f,
154 : foreach_log_level
155 : #undef _
156 : } log_level_t;
157 :
158 : static char *log_level_strings[] = {
159 : #define _(f,s) s,
160 : foreach_log_level
161 : #undef _
162 : };
163 :
164 : static int logmask = 1 << LOG_DEBUG;
165 :
166 : static void
167 0 : ip6_neighbor_syslog (vlib_main_t * vm, int priority, char *fmt, ...)
168 : {
169 : /* just use elog for now */
170 : u8 *what;
171 : va_list va;
172 :
173 0 : if ((priority > LOG_EMERG) || !(logmask & (1 << priority)))
174 0 : return;
175 :
176 0 : va_start (va, fmt);
177 0 : if (fmt)
178 : {
179 0 : what = va_format (0, fmt, &va);
180 :
181 : ELOG_TYPE_DECLARE (e) =
182 : {
183 : .format = "ip6 nd: (%s): %s",.format_args = "T4T4",};
184 : struct
185 : {
186 : u32 s[2];
187 : } *ed;
188 0 : ed = ELOG_DATA (vlib_get_elog_main (), e);
189 0 : ed->s[0] =
190 0 : elog_string (vlib_get_elog_main (), log_level_strings[priority]);
191 0 : ed->s[1] = elog_string (vlib_get_elog_main (), (char *) what);
192 : }
193 0 : va_end (va);
194 0 : return;
195 : }
196 :
197 : /* ipv6 neighbor discovery - router advertisements */
198 : typedef enum
199 : {
200 : ICMP6_ROUTER_SOLICITATION_NEXT_DROP,
201 : ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW,
202 : ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX,
203 : ICMP6_ROUTER_SOLICITATION_N_NEXT,
204 : } icmp6_router_solicitation_or_advertisement_next_t;
205 :
206 : /*
207 : * Note: Both periodic RAs and solicited RS come through here.
208 : */
209 : static_always_inline uword
210 110 : icmp6_router_solicitation (vlib_main_t * vm,
211 : vlib_node_runtime_t * node, vlib_frame_t * frame)
212 : {
213 110 : vnet_main_t *vnm = vnet_get_main ();
214 110 : ip6_main_t *im = &ip6_main;
215 110 : uword n_packets = frame->n_vectors;
216 : u32 *from, *to_next;
217 : u32 n_left_from, n_left_to_next, next_index;
218 110 : u32 n_advertisements_sent = 0;
219 : int bogus_length;
220 :
221 : icmp6_neighbor_discovery_option_type_t option_type;
222 :
223 : vlib_node_runtime_t *error_node =
224 110 : vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
225 :
226 110 : from = vlib_frame_vector_args (frame);
227 110 : n_left_from = n_packets;
228 110 : next_index = node->cached_next_index;
229 :
230 110 : if (node->flags & VLIB_NODE_FLAG_TRACE)
231 17 : vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
232 : /* stride */ 1,
233 : sizeof (icmp6_input_trace_t));
234 :
235 : /* source may append his LL address */
236 110 : option_type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
237 :
238 220 : while (n_left_from > 0)
239 : {
240 110 : vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
241 :
242 220 : while (n_left_from > 0 && n_left_to_next > 0)
243 : {
244 : vlib_buffer_t *p0;
245 : ip6_header_t *ip0;
246 110 : ip6_ra_t *radv_info = NULL;
247 :
248 : icmp6_neighbor_discovery_header_t *h0;
249 : icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
250 :
251 : u32 bi0, options_len0, sw_if_index0, next0, error0;
252 110 : u32 is_solicitation = 1, is_dropped = 0;
253 : u32 is_unspecified, is_link_local;
254 :
255 110 : bi0 = to_next[0] = from[0];
256 :
257 110 : from += 1;
258 110 : to_next += 1;
259 110 : n_left_from -= 1;
260 110 : n_left_to_next -= 1;
261 :
262 110 : p0 = vlib_get_buffer (vm, bi0);
263 110 : ip0 = vlib_buffer_get_current (p0);
264 110 : h0 = ip6_next_header (ip0);
265 110 : options_len0 =
266 110 : clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
267 110 : is_unspecified = ip6_address_is_unspecified (&ip0->src_address);
268 110 : is_link_local =
269 110 : ip6_address_is_link_local_unicast (&ip0->src_address);
270 :
271 110 : error0 = ICMP6_ERROR_NONE;
272 110 : sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
273 :
274 : /* check if solicitation (not from nd_timer node) */
275 110 : if (ip6_address_is_unspecified (&ip0->dst_address))
276 3 : is_solicitation = 0;
277 :
278 : /* Check that source address is unspecified, link-local or else on-link. */
279 110 : if (!is_unspecified && !is_link_local)
280 : {
281 4 : u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
282 :
283 4 : if (ADJ_INDEX_INVALID != src_adj_index0)
284 : {
285 3 : ip_adjacency_t *adj0 = adj_get (src_adj_index0);
286 :
287 3 : error0 = (adj0->rewrite_header.sw_if_index != sw_if_index0
288 : ?
289 : ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK
290 3 : : error0);
291 : }
292 : else
293 : {
294 1 : error0 = ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK;
295 : }
296 : }
297 :
298 : /* check for source LL option and process */
299 110 : o0 = (void *) (h0 + 1);
300 110 : o0 = ((options_len0 == 8
301 79 : && o0->header.type == option_type
302 189 : && o0->header.n_data_u64s == 1) ? o0 : 0);
303 :
304 : /* if src address unspecified IGNORE any options */
305 110 : if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
306 : !is_unspecified && !is_link_local))
307 : {
308 : /* *INDENT-OFF* */
309 0 : ip_neighbor_learn_t learn = {
310 : .sw_if_index = sw_if_index0,
311 : .ip = {
312 : .ip.ip6 = ip0->src_address,
313 : .version = AF_IP6,
314 : },
315 : };
316 : /* *INDENT-ON* */
317 0 : memcpy (&learn.mac, o0->ethernet_address, sizeof (learn.mac));
318 0 : ip_neighbor_learn_dp (&learn);
319 : }
320 :
321 : /* default is to drop */
322 110 : next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
323 :
324 110 : if (error0 == ICMP6_ERROR_NONE)
325 : {
326 : vnet_sw_interface_t *sw_if0;
327 : ethernet_interface_t *eth_if0;
328 : u32 adj_index0;
329 :
330 109 : sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
331 109 : ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
332 : eth_if0 =
333 109 : ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
334 :
335 : /* only support ethernet interface type for now */
336 109 : error0 =
337 : (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
338 109 : : error0;
339 :
340 109 : if (error0 == ICMP6_ERROR_NONE)
341 : {
342 : /* adjust the sizeof the buffer to just include the ipv6 header */
343 95 : p0->current_length -=
344 : (options_len0 +
345 : sizeof (icmp6_neighbor_discovery_header_t));
346 :
347 95 : radv_info = ip6_ra_get_itf (sw_if_index0);
348 :
349 95 : error0 = ((!radv_info || 0 == radv_info->send_radv) ?
350 190 : ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
351 : error0);
352 95 : if (error0 == ICMP6_ERROR_NONE)
353 : {
354 18 : f64 now = vlib_time_now (vm);
355 :
356 : /* for solicited adverts - need to rate limit */
357 18 : if (is_solicitation)
358 : {
359 15 : if (0 != radv_info->last_radv_time &&
360 1 : (now - radv_info->last_radv_time) <
361 : MIN_DELAY_BETWEEN_RAS)
362 1 : is_dropped = 1;
363 : else
364 14 : radv_info->last_radv_time = now;
365 : }
366 :
367 : /* send now */
368 : icmp6_router_advertisement_header_t rh;
369 :
370 18 : rh.icmp.type = ICMP6_router_advertisement;
371 18 : rh.icmp.code = 0;
372 18 : rh.icmp.checksum = 0;
373 :
374 18 : rh.current_hop_limit = radv_info->curr_hop_limit;
375 18 : rh.router_lifetime_in_sec =
376 18 : clib_host_to_net_u16
377 18 : (radv_info->adv_router_lifetime_in_sec);
378 : rh.
379 : time_in_msec_between_retransmitted_neighbor_solicitations
380 18 : =
381 18 : clib_host_to_net_u32 (radv_info->
382 : adv_time_in_msec_between_retransmitted_neighbor_solicitations);
383 18 : rh.neighbor_reachable_time_in_msec =
384 18 : clib_host_to_net_u32 (radv_info->
385 : adv_neighbor_reachable_time_in_msec);
386 :
387 18 : rh.flags =
388 18 : (radv_info->adv_managed_flag) ?
389 : ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP :
390 : 0;
391 18 : rh.flags |=
392 18 : ((radv_info->adv_other_flag) ?
393 : ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP :
394 : 0);
395 :
396 :
397 18 : u16 payload_length =
398 : sizeof (icmp6_router_advertisement_header_t);
399 :
400 18 : if (vlib_buffer_add_data
401 : (vm, &bi0, (void *) &rh,
402 : sizeof (icmp6_router_advertisement_header_t)))
403 : {
404 : /* buffer allocation failed, drop the pkt */
405 0 : error0 = ICMP6_ERROR_ALLOC_FAILURE;
406 0 : goto drop0;
407 : }
408 :
409 18 : if (radv_info->adv_link_layer_address)
410 : {
411 : icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
412 : h;
413 :
414 18 : h.header.type =
415 : ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
416 18 : h.header.n_data_u64s = 1;
417 :
418 : /* copy ll address */
419 18 : clib_memcpy (&h.ethernet_address[0],
420 : ð_if0->address, 6);
421 :
422 18 : if (vlib_buffer_add_data
423 : (vm, &bi0, (void *) &h,
424 : sizeof
425 : (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t)))
426 : {
427 0 : error0 = ICMP6_ERROR_ALLOC_FAILURE;
428 0 : goto drop0;
429 : }
430 :
431 18 : payload_length +=
432 : sizeof
433 : (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t);
434 : }
435 :
436 : /* add MTU option */
437 18 : if (radv_info->adv_link_mtu)
438 : {
439 : icmp6_neighbor_discovery_mtu_option_t h;
440 :
441 18 : h.unused = 0;
442 18 : h.mtu =
443 18 : clib_host_to_net_u32 (radv_info->adv_link_mtu);
444 18 : h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu;
445 18 : h.header.n_data_u64s = 1;
446 :
447 18 : payload_length +=
448 : sizeof (icmp6_neighbor_discovery_mtu_option_t);
449 :
450 18 : if (vlib_buffer_add_data
451 : (vm, &bi0, (void *) &h,
452 : sizeof
453 : (icmp6_neighbor_discovery_mtu_option_t)))
454 : {
455 0 : error0 = ICMP6_ERROR_ALLOC_FAILURE;
456 0 : goto drop0;
457 : }
458 : }
459 :
460 : /* add advertised prefix options */
461 : ip6_radv_prefix_t *pr_info;
462 :
463 : /* *INDENT-OFF* */
464 29 : pool_foreach (pr_info, radv_info->adv_prefixes_pool)
465 : {
466 11 : if(pr_info->enabled &&
467 11 : (!pr_info->decrement_lifetime_flag
468 0 : || (pr_info->pref_lifetime_expires >0)))
469 : {
470 : /* advertise this prefix */
471 : icmp6_neighbor_discovery_prefix_information_option_t h;
472 :
473 11 : h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information;
474 11 : h.header.n_data_u64s = (sizeof(icmp6_neighbor_discovery_prefix_information_option_t) >> 3);
475 :
476 11 : h.dst_address_length = pr_info->prefix_len;
477 :
478 11 : h.flags = (pr_info->adv_on_link_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_FLAG_ON_LINK : 0;
479 11 : h.flags |= (pr_info->adv_autonomous_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_AUTO : 0;
480 :
481 11 : if(radv_info->cease_radv && pr_info->deprecated_prefix_flag)
482 : {
483 0 : h.valid_time = clib_host_to_net_u32(MIN_ADV_VALID_LIFETIME);
484 0 : h.preferred_time = 0;
485 : }
486 : else
487 : {
488 11 : if(pr_info->decrement_lifetime_flag)
489 : {
490 0 : pr_info->adv_valid_lifetime_in_secs = ((pr_info->valid_lifetime_expires > now)) ?
491 0 : (pr_info->valid_lifetime_expires - now) : 0;
492 :
493 0 : pr_info->adv_pref_lifetime_in_secs = ((pr_info->pref_lifetime_expires > now)) ?
494 0 : (pr_info->pref_lifetime_expires - now) : 0;
495 : }
496 :
497 11 : h.valid_time = clib_host_to_net_u32(pr_info->adv_valid_lifetime_in_secs);
498 11 : h.preferred_time = clib_host_to_net_u32(pr_info->adv_pref_lifetime_in_secs) ;
499 : }
500 11 : h.unused = 0;
501 :
502 : /* Handy for debugging, but too noisy... */
503 : if (0 && CLIB_DEBUG > 0)
504 : clib_warning
505 : ("send RA for prefix %U/%d "
506 : "sw_if_index %d valid %u preferred %u",
507 : format_ip6_address, &pr_info->prefix,
508 : pr_info->prefix_len, sw_if_index0,
509 : clib_net_to_host_u32 (h.valid_time),
510 : clib_net_to_host_u32 (h.preferred_time));
511 :
512 11 : if (h.valid_time == 0)
513 0 : clib_warning ("BUG: send RA with valid_time 0");
514 :
515 11 : clib_memcpy(&h.dst_address, &pr_info->prefix, sizeof(ip6_address_t));
516 :
517 11 : payload_length += sizeof( icmp6_neighbor_discovery_prefix_information_option_t);
518 :
519 11 : if (vlib_buffer_add_data
520 : (vm, &bi0, (void *)&h,
521 : sizeof(icmp6_neighbor_discovery_prefix_information_option_t)))
522 : {
523 0 : error0 = ICMP6_ERROR_ALLOC_FAILURE;
524 0 : goto drop0;
525 : }
526 :
527 : }
528 : }
529 : /* *INDENT-ON* */
530 :
531 : /* add additional options before here */
532 :
533 : /* finish building the router advertisement... */
534 18 : if (!is_unspecified && radv_info->send_unicast)
535 : {
536 14 : ip0->dst_address = ip0->src_address;
537 : }
538 : else
539 : {
540 : /* target address is all-nodes mcast addr */
541 4 : ip6_set_reserved_multicast_address
542 : (&ip0->dst_address,
543 : IP6_MULTICAST_SCOPE_link_local,
544 : IP6_MULTICAST_GROUP_ID_all_hosts);
545 : }
546 :
547 : /* source address MUST be the link-local address */
548 18 : ip6_address_copy (&ip0->src_address,
549 : ip6_get_link_local_address
550 : (radv_info->sw_if_index));
551 :
552 18 : ip0->hop_limit = 255;
553 18 : ip0->payload_length =
554 18 : clib_host_to_net_u16 (payload_length);
555 :
556 18 : icmp6_router_advertisement_header_t *rh0 =
557 : (icmp6_router_advertisement_header_t *) (ip0 + 1);
558 18 : rh0->icmp.checksum =
559 18 : ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
560 : &bogus_length);
561 18 : ASSERT (bogus_length == 0);
562 :
563 : /* setup output if and adjacency */
564 18 : vnet_buffer (p0)->sw_if_index[VLIB_RX] =
565 18 : vnet_main.local_interface_sw_if_index;
566 :
567 18 : if (is_solicitation)
568 : {
569 : ethernet_header_t *eth0;
570 : /* Reuse current MAC header, copy SMAC to DMAC and
571 : * interface MAC to SMAC */
572 15 : vlib_buffer_reset (p0);
573 15 : vlib_buffer_advance (
574 15 : p0, vnet_buffer (p0)->l2_hdr_offset);
575 15 : eth0 = vlib_buffer_get_current (p0);
576 15 : clib_memcpy (eth0->dst_address, eth0->src_address,
577 : 6);
578 15 : clib_memcpy (eth0->src_address, ð_if0->address,
579 : 6);
580 15 : next0 =
581 15 : is_dropped ? next0 :
582 : ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX;
583 15 : vnet_buffer (p0)->sw_if_index[VLIB_TX] =
584 : sw_if_index0;
585 : }
586 : else
587 : {
588 3 : adj_index0 = ip6_link_get_mcast_adj (sw_if_index0);
589 3 : if (adj_index0 == INDEX_INVALID)
590 0 : error0 = ICMP6_ERROR_DST_LOOKUP_MISS;
591 : else
592 : {
593 3 : next0 =
594 3 : is_dropped ? next0 :
595 : ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW;
596 3 : vnet_buffer (p0)->ip.adj_index[VLIB_TX] =
597 : adj_index0;
598 : }
599 : }
600 18 : p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
601 :
602 18 : radv_info->n_solicitations_dropped += is_dropped;
603 18 : radv_info->n_solicitations_rcvd += is_solicitation;
604 :
605 18 : if ((error0 == ICMP6_ERROR_NONE) && !is_dropped)
606 : {
607 17 : radv_info->n_advertisements_sent++;
608 17 : n_advertisements_sent++;
609 : }
610 : }
611 : }
612 : }
613 :
614 92 : drop0:
615 110 : p0->error = error_node->errors[error0];
616 :
617 110 : if (error0 != ICMP6_ERROR_NONE)
618 92 : vlib_error_count (vm, error_node->node_index, error0, 1);
619 :
620 110 : vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
621 : to_next, n_left_to_next,
622 : bi0, next0);
623 :
624 : }
625 :
626 110 : vlib_put_next_frame (vm, node, next_index, n_left_to_next);
627 : }
628 :
629 : /* Account for router advertisements sent. */
630 110 : vlib_error_count (vm, error_node->node_index,
631 : ICMP6_ERROR_ROUTER_ADVERTISEMENTS_TX,
632 : n_advertisements_sent);
633 :
634 110 : return frame->n_vectors;
635 : }
636 :
637 : /* *INDENT-OFF* */
638 178120 : VLIB_REGISTER_NODE (ip6_icmp_router_solicitation_node,static) =
639 : {
640 : .function = icmp6_router_solicitation,
641 : .name = "icmp6-router-solicitation",
642 :
643 : .vector_size = sizeof (u32),
644 :
645 : .format_trace = format_icmp6_input_trace,
646 :
647 : .n_next_nodes = ICMP6_ROUTER_SOLICITATION_N_NEXT,
648 : .next_nodes = {
649 : [ICMP6_ROUTER_SOLICITATION_NEXT_DROP] = "ip6-drop",
650 : [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW] = "ip6-rewrite-mcast",
651 : [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX] = "interface-output",
652 : },
653 : };
654 : /* *INDENT-ON* */
655 :
656 : /* validate advertised info for consistancy (see RFC-4861 section 6.2.7) - log any inconsistencies, packet will always be dropped */
657 : static_always_inline uword
658 5 : icmp6_router_advertisement (vlib_main_t * vm,
659 : vlib_node_runtime_t * node, vlib_frame_t * frame)
660 : {
661 5 : vnet_main_t *vnm = vnet_get_main ();
662 5 : uword n_packets = frame->n_vectors;
663 : u32 *from, *to_next;
664 : u32 n_left_from, n_left_to_next, next_index;
665 5 : u32 n_advertisements_rcvd = 0;
666 :
667 : vlib_node_runtime_t *error_node =
668 5 : vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
669 :
670 5 : from = vlib_frame_vector_args (frame);
671 5 : n_left_from = n_packets;
672 5 : next_index = node->cached_next_index;
673 :
674 5 : if (node->flags & VLIB_NODE_FLAG_TRACE)
675 5 : vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
676 : /* stride */ 1,
677 : sizeof (icmp6_input_trace_t));
678 :
679 10 : while (n_left_from > 0)
680 : {
681 5 : vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
682 :
683 10 : while (n_left_from > 0 && n_left_to_next > 0)
684 : {
685 : vlib_buffer_t *p0;
686 : ip6_header_t *ip0;
687 5 : ip6_ra_t *radv_info = 0;
688 : icmp6_router_advertisement_header_t *h0;
689 : u32 bi0, options_len0, sw_if_index0, next0, error0;
690 :
691 5 : bi0 = to_next[0] = from[0];
692 :
693 5 : from += 1;
694 5 : to_next += 1;
695 5 : n_left_from -= 1;
696 5 : n_left_to_next -= 1;
697 :
698 5 : p0 = vlib_get_buffer (vm, bi0);
699 5 : ip0 = vlib_buffer_get_current (p0);
700 5 : h0 = ip6_next_header (ip0);
701 5 : options_len0 =
702 5 : clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
703 :
704 5 : error0 = ICMP6_ERROR_NONE;
705 5 : sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
706 :
707 : /* Check that source address is link-local */
708 5 : error0 = (!ip6_address_is_link_local_unicast (&ip0->src_address)) ?
709 5 : ICMP6_ERROR_ROUTER_ADVERTISEMENT_SOURCE_NOT_LINK_LOCAL : error0;
710 :
711 : /* default is to drop */
712 5 : next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
713 :
714 5 : n_advertisements_rcvd++;
715 :
716 5 : if (error0 == ICMP6_ERROR_NONE)
717 : {
718 : vnet_sw_interface_t *sw_if0;
719 : ethernet_interface_t *eth_if0;
720 :
721 5 : sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
722 5 : ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
723 : eth_if0 =
724 5 : ethernet_get_interface (ðernet_main, sw_if0->hw_if_index);
725 :
726 : /* only support ethernet interface type for now */
727 5 : error0 =
728 : (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
729 5 : : error0;
730 :
731 5 : if (error0 == ICMP6_ERROR_NONE)
732 : {
733 : /* look up the radv_t information for this interface */
734 5 : radv_info = ip6_ra_get_itf (sw_if_index0);
735 :
736 5 : error0 = ((!radv_info) ?
737 5 : ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
738 : error0);
739 :
740 5 : if (error0 == ICMP6_ERROR_NONE)
741 : {
742 5 : radv_info->keep_sending_rs = 0;
743 :
744 : ip6_ra_report_t r;
745 :
746 5 : r.sw_if_index = sw_if_index0;
747 5 : memcpy (&r.router_address, &ip0->src_address, 16);
748 5 : r.current_hop_limit = h0->current_hop_limit;
749 5 : r.flags = h0->flags;
750 5 : r.router_lifetime_in_sec =
751 5 : clib_net_to_host_u16 (h0->router_lifetime_in_sec);
752 5 : r.neighbor_reachable_time_in_msec =
753 5 : clib_net_to_host_u32
754 : (h0->neighbor_reachable_time_in_msec);
755 5 : r.time_in_msec_between_retransmitted_neighbor_solicitations = clib_net_to_host_u32 (h0->time_in_msec_between_retransmitted_neighbor_solicitations);
756 5 : r.prefixes = 0;
757 :
758 : /* validate advertised information */
759 5 : if ((h0->current_hop_limit && radv_info->curr_hop_limit)
760 0 : && (h0->current_hop_limit !=
761 0 : radv_info->curr_hop_limit))
762 : {
763 0 : ip6_neighbor_syslog (vm, LOG_WARNING,
764 : "our AdvCurHopLimit on %U doesn't agree with %U",
765 : format_vnet_sw_if_index_name,
766 : vnm, sw_if_index0,
767 : format_ip6_address,
768 : &ip0->src_address);
769 : }
770 :
771 5 : if ((h0->flags &
772 : ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP)
773 5 : != radv_info->adv_managed_flag)
774 : {
775 0 : ip6_neighbor_syslog (vm, LOG_WARNING,
776 : "our AdvManagedFlag on %U doesn't agree with %U",
777 : format_vnet_sw_if_index_name,
778 : vnm, sw_if_index0,
779 : format_ip6_address,
780 : &ip0->src_address);
781 : }
782 :
783 5 : if ((h0->flags &
784 : ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP)
785 5 : != radv_info->adv_other_flag)
786 : {
787 0 : ip6_neighbor_syslog (vm, LOG_WARNING,
788 : "our AdvOtherConfigFlag on %U doesn't agree with %U",
789 : format_vnet_sw_if_index_name,
790 : vnm, sw_if_index0,
791 : format_ip6_address,
792 : &ip0->src_address);
793 : }
794 :
795 5 : if ((h0->
796 : time_in_msec_between_retransmitted_neighbor_solicitations
797 0 : && radv_info->
798 : adv_time_in_msec_between_retransmitted_neighbor_solicitations)
799 0 : && (h0->
800 : time_in_msec_between_retransmitted_neighbor_solicitations
801 : !=
802 0 : clib_host_to_net_u32 (radv_info->
803 : adv_time_in_msec_between_retransmitted_neighbor_solicitations)))
804 : {
805 0 : ip6_neighbor_syslog (vm, LOG_WARNING,
806 : "our AdvRetransTimer on %U doesn't agree with %U",
807 : format_vnet_sw_if_index_name,
808 : vnm, sw_if_index0,
809 : format_ip6_address,
810 : &ip0->src_address);
811 : }
812 :
813 5 : if ((h0->neighbor_reachable_time_in_msec &&
814 0 : radv_info->adv_neighbor_reachable_time_in_msec) &&
815 0 : (h0->neighbor_reachable_time_in_msec !=
816 0 : clib_host_to_net_u32
817 : (radv_info->adv_neighbor_reachable_time_in_msec)))
818 : {
819 0 : ip6_neighbor_syslog (vm, LOG_WARNING,
820 : "our AdvReachableTime on %U doesn't agree with %U",
821 : format_vnet_sw_if_index_name,
822 : vnm, sw_if_index0,
823 : format_ip6_address,
824 : &ip0->src_address);
825 : }
826 :
827 : /* check for MTU or prefix options or .. */
828 5 : u8 *opt_hdr = (u8 *) (h0 + 1);
829 9 : while (options_len0 > 0)
830 : {
831 4 : icmp6_neighbor_discovery_option_header_t *o0 =
832 : (icmp6_neighbor_discovery_option_header_t *)
833 : opt_hdr;
834 4 : int opt_len = o0->n_data_u64s << 3;
835 4 : icmp6_neighbor_discovery_option_type_t option_type =
836 4 : o0->type;
837 :
838 4 : if (options_len0 < 2)
839 : {
840 0 : ip6_neighbor_syslog (vm, LOG_ERR,
841 : "malformed RA packet on %U from %U",
842 : format_vnet_sw_if_index_name,
843 : vnm, sw_if_index0,
844 : format_ip6_address,
845 : &ip0->src_address);
846 0 : break;
847 : }
848 :
849 4 : if (opt_len == 0)
850 : {
851 0 : ip6_neighbor_syslog (vm, LOG_ERR,
852 : " zero length option in RA on %U from %U",
853 : format_vnet_sw_if_index_name,
854 : vnm, sw_if_index0,
855 : format_ip6_address,
856 : &ip0->src_address);
857 0 : break;
858 : }
859 4 : else if (opt_len > options_len0)
860 : {
861 0 : ip6_neighbor_syslog (vm, LOG_ERR,
862 : "option length in RA packet greater than total length on %U from %U",
863 : format_vnet_sw_if_index_name,
864 : vnm, sw_if_index0,
865 : format_ip6_address,
866 : &ip0->src_address);
867 0 : break;
868 : }
869 :
870 4 : options_len0 -= opt_len;
871 4 : opt_hdr += opt_len;
872 :
873 4 : switch (option_type)
874 : {
875 0 : case ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address:
876 : {
877 : icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
878 0 : * h =
879 : (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
880 : *) (o0);
881 :
882 0 : if (opt_len < sizeof (*h))
883 0 : break;
884 :
885 0 : memcpy (r.slla, h->ethernet_address, 6);
886 : }
887 0 : break;
888 :
889 0 : case ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu:
890 : {
891 0 : icmp6_neighbor_discovery_mtu_option_t *h =
892 : (icmp6_neighbor_discovery_mtu_option_t
893 : *) (o0);
894 :
895 0 : if (opt_len < sizeof (*h))
896 0 : break;
897 :
898 0 : r.mtu = clib_net_to_host_u32 (h->mtu);
899 :
900 0 : if ((h->mtu && radv_info->adv_link_mtu) &&
901 0 : (h->mtu !=
902 0 : clib_host_to_net_u32
903 : (radv_info->adv_link_mtu)))
904 : {
905 0 : ip6_neighbor_syslog (vm, LOG_WARNING,
906 : "our AdvLinkMTU on %U doesn't agree with %U",
907 : format_vnet_sw_if_index_name,
908 : vnm, sw_if_index0,
909 : format_ip6_address,
910 : &ip0->src_address);
911 : }
912 : }
913 0 : break;
914 :
915 4 : case ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information:
916 : {
917 : icmp6_neighbor_discovery_prefix_information_option_t
918 4 : * h =
919 : (icmp6_neighbor_discovery_prefix_information_option_t
920 : *) (o0);
921 :
922 : /* validate advertised prefix options */
923 : ip6_radv_prefix_t *pr_info;
924 : u32 preferred, valid;
925 :
926 4 : if (opt_len < sizeof (*h))
927 0 : break;
928 :
929 4 : vec_validate (r.prefixes,
930 : vec_len (r.prefixes));
931 4 : ra_report_prefix_info_t *prefix =
932 4 : vec_elt_at_index (r.prefixes,
933 : vec_len (r.prefixes) - 1);
934 :
935 : preferred =
936 4 : clib_net_to_host_u32 (h->preferred_time);
937 4 : valid = clib_net_to_host_u32 (h->valid_time);
938 :
939 4 : prefix->preferred_time = preferred;
940 4 : prefix->valid_time = valid;
941 4 : prefix->flags = h->flags & 0xc0;
942 4 : prefix->prefix.fp_len = h->dst_address_length;
943 4 : prefix->prefix.fp_addr.ip6 = h->dst_address;
944 4 : prefix->prefix.fp_proto = FIB_PROTOCOL_IP6;
945 :
946 : /* look for matching prefix - if we our advertising it, it better be consistant */
947 : /* *INDENT-OFF* */
948 4 : pool_foreach (pr_info, radv_info->adv_prefixes_pool)
949 : {
950 :
951 : ip6_address_t mask;
952 0 : ip6_address_mask_from_width(&mask, pr_info->prefix_len);
953 :
954 0 : if(pr_info->enabled &&
955 0 : (pr_info->prefix_len == h->dst_address_length) &&
956 0 : ip6_address_is_equal_masked (&pr_info->prefix, &h->dst_address, &mask))
957 : {
958 : /* found it */
959 0 : if(!pr_info->decrement_lifetime_flag &&
960 0 : valid != pr_info->adv_valid_lifetime_in_secs)
961 : {
962 0 : ip6_neighbor_syslog(vm, LOG_WARNING,
963 : "our ADV validlifetime on %U for %U does not agree with %U",
964 : format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
965 : format_ip6_address, &h->dst_address);
966 : }
967 0 : if(!pr_info->decrement_lifetime_flag &&
968 0 : preferred != pr_info->adv_pref_lifetime_in_secs)
969 : {
970 0 : ip6_neighbor_syslog(vm, LOG_WARNING,
971 : "our ADV preferredlifetime on %U for %U does not agree with %U",
972 : format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
973 : format_ip6_address, &h->dst_address);
974 : }
975 : }
976 0 : break;
977 : }
978 : /* *INDENT-ON* */
979 4 : break;
980 : }
981 0 : default:
982 : /* skip this one */
983 0 : break;
984 : }
985 : }
986 5 : ip6_ra_publish (&r);
987 : }
988 : }
989 : }
990 :
991 5 : p0->error = error_node->errors[error0];
992 :
993 5 : if (error0 != ICMP6_ERROR_NONE)
994 0 : vlib_error_count (vm, error_node->node_index, error0, 1);
995 :
996 5 : vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
997 : to_next, n_left_to_next,
998 : bi0, next0);
999 : }
1000 :
1001 5 : vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1002 : }
1003 :
1004 : /* Account for router advertisements received. */
1005 5 : vlib_error_count (vm, error_node->node_index,
1006 : ICMP6_ERROR_ROUTER_ADVERTISEMENTS_RX,
1007 : n_advertisements_rcvd);
1008 :
1009 5 : return frame->n_vectors;
1010 : }
1011 :
1012 : /* *INDENT-OFF* */
1013 178120 : VLIB_REGISTER_NODE (ip6_icmp_router_advertisement_node,static) =
1014 : {
1015 : .function = icmp6_router_advertisement,
1016 : .name = "icmp6-router-advertisement",
1017 :
1018 : .vector_size = sizeof (u32),
1019 :
1020 : .format_trace = format_icmp6_input_trace,
1021 :
1022 : .n_next_nodes = 1,
1023 : .next_nodes = {
1024 : [0] = "ip6-drop",
1025 : },
1026 : };
1027 : /* *INDENT-ON* */
1028 :
1029 : static inline f64
1030 4 : random_f64_from_to (f64 from, f64 to)
1031 : {
1032 : static u32 seed = 0;
1033 : static u8 seed_set = 0;
1034 4 : if (!seed_set)
1035 : {
1036 2 : seed = random_default_seed ();
1037 2 : seed_set = 1;
1038 : }
1039 4 : return random_f64 (&seed) * (to - from) + from;
1040 : }
1041 :
1042 : static inline u8
1043 2 : get_mac_address (u32 sw_if_index, u8 * address)
1044 : {
1045 2 : vnet_main_t *vnm = vnet_get_main ();
1046 2 : vnet_hw_interface_t *hw_if = vnet_get_sup_hw_interface (vnm, sw_if_index);
1047 2 : if (!hw_if->hw_address)
1048 0 : return 1;
1049 2 : clib_memcpy (address, hw_if->hw_address, 6);
1050 2 : return 0;
1051 : }
1052 :
1053 : static inline vlib_buffer_t *
1054 2 : create_buffer_for_rs (vlib_main_t * vm, ip6_ra_t * radv_info)
1055 : {
1056 : u32 bi0;
1057 : vlib_buffer_t *p0;
1058 : icmp6_router_solicitation_header_t *rh;
1059 : u16 payload_length;
1060 : int bogus_length;
1061 : u32 sw_if_index;
1062 :
1063 2 : sw_if_index = radv_info->sw_if_index;
1064 :
1065 2 : if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
1066 : {
1067 0 : clib_warning ("buffer allocation failure");
1068 0 : return 0;
1069 : }
1070 :
1071 2 : p0 = vlib_get_buffer (vm, bi0);
1072 2 : p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
1073 :
1074 2 : vnet_buffer (p0)->sw_if_index[VLIB_RX] = sw_if_index;
1075 2 : vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index;
1076 :
1077 4 : vnet_buffer (p0)->ip.adj_index[VLIB_TX] =
1078 2 : ip6_link_get_mcast_adj (sw_if_index);
1079 :
1080 2 : rh = vlib_buffer_get_current (p0);
1081 2 : p0->current_length = sizeof (*rh);
1082 :
1083 2 : rh->neighbor.icmp.type = ICMP6_router_solicitation;
1084 2 : rh->neighbor.icmp.code = 0;
1085 2 : rh->neighbor.icmp.checksum = 0;
1086 2 : rh->neighbor.reserved_must_be_zero = 0;
1087 :
1088 2 : rh->link_layer_option.header.type =
1089 : ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
1090 2 : if (0 != get_mac_address (sw_if_index,
1091 2 : rh->link_layer_option.ethernet_address))
1092 : {
1093 0 : clib_warning ("interface with sw_if_index %u has no mac address",
1094 : sw_if_index);
1095 0 : vlib_buffer_free (vm, &bi0, 1);
1096 0 : return 0;
1097 : }
1098 2 : rh->link_layer_option.header.n_data_u64s = 1;
1099 :
1100 2 : payload_length = sizeof (rh->neighbor) + sizeof (u64);
1101 :
1102 2 : rh->ip.ip_version_traffic_class_and_flow_label =
1103 2 : clib_host_to_net_u32 (0x6 << 28);
1104 2 : rh->ip.payload_length = clib_host_to_net_u16 (payload_length);
1105 2 : rh->ip.protocol = IP_PROTOCOL_ICMP6;
1106 2 : rh->ip.hop_limit = 255;
1107 2 : ip6_address_copy (&rh->ip.src_address,
1108 : ip6_get_link_local_address (radv_info->sw_if_index));
1109 : /* set address ff02::2 */
1110 2 : rh->ip.dst_address.as_u64[0] = clib_host_to_net_u64 (0xff02ULL << 48);
1111 2 : rh->ip.dst_address.as_u64[1] = clib_host_to_net_u64 (2);
1112 :
1113 2 : rh->neighbor.icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, p0,
1114 : &rh->ip,
1115 : &bogus_length);
1116 :
1117 2 : return p0;
1118 : }
1119 :
1120 : static inline void
1121 3 : stop_sending_rs (vlib_main_t * vm, ip6_ra_t * ra)
1122 : {
1123 : u32 bi0;
1124 :
1125 3 : ra->keep_sending_rs = 0;
1126 3 : if (ra->buffer)
1127 : {
1128 1 : bi0 = vlib_get_buffer_index (vm, ra->buffer);
1129 1 : vlib_buffer_free (vm, &bi0, 1);
1130 1 : ra->buffer = 0;
1131 : }
1132 3 : }
1133 :
1134 : static inline bool
1135 8 : check_send_rs (vlib_main_t * vm, ip6_ra_t * radv_info, f64 current_time,
1136 : f64 * due_time)
1137 : {
1138 : vlib_buffer_t *p0;
1139 : vlib_frame_t *f;
1140 : u32 *to_next;
1141 : u32 next_index;
1142 : vlib_buffer_t *c0;
1143 : u32 ci0;
1144 :
1145 : icmp6_send_router_solicitation_params_t *params;
1146 :
1147 8 : if (!radv_info->keep_sending_rs)
1148 4 : return false;
1149 :
1150 4 : params = &radv_info->params;
1151 :
1152 4 : if (radv_info->due_time > current_time)
1153 : {
1154 1 : *due_time = radv_info->due_time;
1155 1 : return true;
1156 : }
1157 :
1158 3 : p0 = radv_info->buffer;
1159 :
1160 3 : next_index = ip6_rewrite_mcast_node.index;
1161 :
1162 3 : c0 = vlib_buffer_copy (vm, p0);
1163 3 : if (c0 == NULL)
1164 0 : return radv_info->keep_sending_rs;
1165 :
1166 3 : ci0 = vlib_get_buffer_index (vm, c0);
1167 :
1168 3 : f = vlib_get_frame_to_node (vm, next_index);
1169 3 : to_next = vlib_frame_vector_args (f);
1170 3 : to_next[0] = ci0;
1171 3 : f->n_vectors = 1;
1172 3 : vlib_put_frame_to_node (vm, next_index, f);
1173 :
1174 3 : if (params->mrc != 0 && --radv_info->n_left == 0)
1175 1 : stop_sending_rs (vm, radv_info);
1176 : else
1177 : {
1178 2 : radv_info->sleep_interval =
1179 2 : (2 + random_f64_from_to (-0.1, 0.1)) * radv_info->sleep_interval;
1180 2 : if (radv_info->sleep_interval > params->mrt)
1181 0 : radv_info->sleep_interval =
1182 0 : (1 + random_f64_from_to (-0.1, 0.1)) * params->mrt;
1183 :
1184 2 : radv_info->due_time = current_time + radv_info->sleep_interval;
1185 :
1186 2 : if (params->mrd != 0
1187 0 : && current_time > radv_info->start_time + params->mrd)
1188 0 : stop_sending_rs (vm, radv_info);
1189 : else
1190 2 : *due_time = radv_info->due_time;
1191 : }
1192 :
1193 3 : return radv_info->keep_sending_rs;
1194 : }
1195 :
1196 : static uword
1197 559 : send_rs_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
1198 : vlib_frame_t * f0)
1199 : {
1200 559 : uword *event_data = NULL;
1201 559 : f64 sleep_time = 1e9;
1202 : ip6_ra_t *radv_info;
1203 : f64 current_time;
1204 : f64 due_time;
1205 559 : f64 dt = 0;
1206 :
1207 : while (true)
1208 : {
1209 564 : vlib_process_wait_for_event_or_clock (vm, sleep_time);
1210 5 : vlib_process_get_events (vm, &event_data);
1211 5 : vec_reset_length (event_data);
1212 :
1213 5 : current_time = vlib_time_now (vm);
1214 : do
1215 : {
1216 5 : due_time = current_time + 1e9;
1217 : /* *INDENT-OFF* */
1218 13 : pool_foreach (radv_info, ip6_ra_pool)
1219 : {
1220 8 : if (check_send_rs (vm, radv_info, current_time, &dt)
1221 3 : && (dt < due_time))
1222 3 : due_time = dt;
1223 : }
1224 : /* *INDENT-ON* */
1225 5 : current_time = vlib_time_now (vm);
1226 : }
1227 5 : while (due_time < current_time);
1228 :
1229 5 : sleep_time = due_time - current_time;
1230 : }
1231 :
1232 : return 0;
1233 : }
1234 :
1235 : /* *INDENT-OFF* */
1236 178120 : VLIB_REGISTER_NODE (ip6_rs_process_node) = {
1237 : .function = send_rs_process,
1238 : .type = VLIB_NODE_TYPE_PROCESS,
1239 : .name = "ip6-rs-process",
1240 : };
1241 : /* *INDENT-ON* */
1242 :
1243 : void
1244 2 : icmp6_send_router_solicitation (vlib_main_t * vm, u32 sw_if_index, u8 stop,
1245 : const icmp6_send_router_solicitation_params_t
1246 : * params)
1247 : {
1248 : ip6_ra_t *ra;
1249 :
1250 2 : ASSERT (~0 != sw_if_index);
1251 :
1252 2 : ra = ip6_ra_get_itf (sw_if_index);
1253 :
1254 2 : if (!ra)
1255 0 : return;
1256 :
1257 2 : stop_sending_rs (vm, ra);
1258 :
1259 2 : if (!stop)
1260 : {
1261 2 : ra->keep_sending_rs = 1;
1262 2 : ra->params = *params;
1263 2 : ra->n_left = params->mrc;
1264 2 : ra->start_time = vlib_time_now (vm);
1265 2 : ra->sleep_interval = (1 + random_f64_from_to (-0.1, 0.1)) * params->irt;
1266 2 : ra->due_time = 0; /* send first packet ASAP */
1267 2 : ra->buffer = create_buffer_for_rs (vm, ra);
1268 2 : if (!ra->buffer)
1269 0 : ra->keep_sending_rs = 0;
1270 : else
1271 2 : vlib_process_signal_event (vm, ip6_rs_process_node.index, 1, 0);
1272 : }
1273 : }
1274 :
1275 : static const ethernet_interface_t *
1276 2046 : ip6_ra_get_eth_itf (u32 sw_if_index)
1277 : {
1278 : const vnet_sw_interface_t *sw;
1279 :
1280 : /* lookup radv container - ethernet interfaces only */
1281 2046 : sw = vnet_get_sup_sw_interface (vnet_get_main (), sw_if_index);
1282 2046 : if (sw->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
1283 2046 : return (ethernet_get_interface (ðernet_main, sw->hw_if_index));
1284 :
1285 0 : return (NULL);
1286 : }
1287 :
1288 : /**
1289 : * @brief called when IP6 is enabled on an interface
1290 : *create and initialize router advertisement parameters with default
1291 : * values for this intfc
1292 : */
1293 : static void
1294 2046 : ip6_ra_link_enable (u32 sw_if_index)
1295 : {
1296 : const ethernet_interface_t *eth;
1297 : ip6_ra_t *radv_info;
1298 :
1299 2046 : eth = ip6_ra_get_eth_itf (sw_if_index);
1300 :
1301 2046 : if (NULL == eth)
1302 155 : return;
1303 :
1304 1891 : ASSERT (INDEX_INVALID == ip6_link_delegate_get (sw_if_index,
1305 : ip6_ra_delegate_id));
1306 :
1307 1891 : pool_get_zero (ip6_ra_pool, radv_info);
1308 :
1309 1891 : radv_info->seed = (u32) clib_cpu_time_now ();
1310 1891 : random_u32 (&radv_info->seed);
1311 :
1312 1891 : radv_info->sw_if_index = sw_if_index;
1313 1891 : radv_info->max_radv_interval = DEF_MAX_RADV_INTERVAL;
1314 1891 : radv_info->min_radv_interval = DEF_MIN_RADV_INTERVAL;
1315 1891 : radv_info->curr_hop_limit = DEF_CURR_HOP_LIMIT;
1316 1891 : radv_info->adv_router_lifetime_in_sec = DEF_DEF_RTR_LIFETIME;
1317 :
1318 : /* send ll address source address option */
1319 1891 : radv_info->adv_link_layer_address = 1;
1320 :
1321 1891 : radv_info->min_delay_between_radv = MIN_DELAY_BETWEEN_RAS;
1322 1891 : radv_info->max_delay_between_radv = MAX_DELAY_BETWEEN_RAS;
1323 1891 : radv_info->max_rtr_default_lifetime = MAX_DEF_RTR_LIFETIME;
1324 :
1325 1891 : radv_info->initial_adverts_count = MAX_INITIAL_RTR_ADVERTISEMENTS;
1326 1891 : radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
1327 1891 : radv_info->initial_adverts_interval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
1328 :
1329 : /* fill in delegate for this interface that will be needed later */
1330 3782 : radv_info->adv_link_mtu =
1331 1891 : vnet_sw_interface_get_mtu (vnet_get_main (), sw_if_index, VNET_MTU_IP6);
1332 :
1333 1891 : mhash_init (&radv_info->address_to_prefix_index, sizeof (uword),
1334 : sizeof (ip6_address_t));
1335 :
1336 1891 : ip6_link_delegate_update (sw_if_index, ip6_ra_delegate_id,
1337 1891 : radv_info - ip6_ra_pool);
1338 : }
1339 :
1340 : static void
1341 1718 : ip6_ra_delegate_disable (index_t rai)
1342 : {
1343 : ip6_radv_prefix_t *p;
1344 : ip6_ra_t *radv_info;
1345 :
1346 1718 : radv_info = pool_elt_at_index (ip6_ra_pool, rai);
1347 :
1348 : /* clean up prefix and MDP pools */
1349 : /* *INDENT-OFF* */
1350 1718 : pool_flush(p, radv_info->adv_prefixes_pool,
1351 : ({
1352 : mhash_unset (&radv_info->address_to_prefix_index, &p->prefix, 0);
1353 : }));
1354 : /* *INDENT-ON* */
1355 :
1356 1718 : pool_free (radv_info->adv_prefixes_pool);
1357 :
1358 1718 : mhash_free (&radv_info->address_to_prefix_index);
1359 :
1360 1718 : pool_put (ip6_ra_pool, radv_info);
1361 1718 : }
1362 :
1363 : void
1364 0 : ip6_ra_update_secondary_radv_info (ip6_address_t * address, u8 prefix_len,
1365 : u32 primary_sw_if_index,
1366 : u32 valid_time, u32 preferred_time)
1367 : {
1368 0 : vlib_main_t *vm = vlib_get_main ();
1369 : static u32 *radv_indices;
1370 : ip6_ra_t *radv_info;
1371 : int i;
1372 : ip6_address_t mask;
1373 0 : ip6_address_mask_from_width (&mask, prefix_len);
1374 :
1375 0 : vec_reset_length (radv_indices);
1376 : /* *INDENT-OFF* */
1377 0 : pool_foreach (radv_info, ip6_ra_pool)
1378 : {
1379 0 : vec_add1 (radv_indices, radv_info - ip6_ra_pool);
1380 : }
1381 : /* *INDENT-ON* */
1382 :
1383 : /*
1384 : * If we have another customer for this prefix,
1385 : * tell the RA code about it...
1386 : */
1387 0 : for (i = 0; i < vec_len (radv_indices); i++)
1388 : {
1389 : ip6_radv_prefix_t *this_prefix;
1390 0 : radv_info = pool_elt_at_index (ip6_ra_pool, radv_indices[i]);
1391 :
1392 : /* We already took care of these timers... */
1393 0 : if (radv_info->sw_if_index == primary_sw_if_index)
1394 0 : continue;
1395 :
1396 : /* *INDENT-OFF* */
1397 0 : pool_foreach (this_prefix, radv_info->adv_prefixes_pool)
1398 : {
1399 0 : if (this_prefix->prefix_len == prefix_len
1400 0 : && ip6_address_is_equal_masked (&this_prefix->prefix, address,
1401 : &mask))
1402 : {
1403 0 : int rv = ip6_ra_prefix (vm,
1404 : radv_info->sw_if_index,
1405 : address,
1406 : prefix_len,
1407 : 0 /* use_default */,
1408 : valid_time,
1409 : preferred_time,
1410 : 0 /* no_advertise */,
1411 : 0 /* off_link */,
1412 : 0 /* no_autoconfig */,
1413 : 0 /* no_onlink */,
1414 : 0 /* is_no */);
1415 0 : if (rv != 0)
1416 0 : clib_warning ("ip6_neighbor_ra_prefix returned %d", rv);
1417 : }
1418 : }
1419 : /* *INDENT-ON*/
1420 : }
1421 0 : }
1422 :
1423 : /* send a RA or update the timer info etc.. */
1424 : static uword
1425 6920 : ip6_ra_process_timer_event (vlib_main_t * vm,
1426 : vlib_node_runtime_t * node, vlib_frame_t * frame)
1427 : {
1428 6920 : vnet_main_t *vnm = vnet_get_main ();
1429 : ip6_ra_t *radv_info;
1430 6920 : vlib_frame_t *f = 0;
1431 6920 : u32 n_this_frame = 0;
1432 6920 : u32 n_left_to_next = 0;
1433 6920 : u32 *to_next = 0;
1434 : u32 bo0;
1435 : icmp6_router_solicitation_header_t *h0;
1436 : vlib_buffer_t *b0;
1437 6920 : f64 now = vlib_time_now (vm);
1438 :
1439 : /* Interface ip6 radv info list */
1440 : /* *INDENT-OFF* */
1441 18580 : pool_foreach (radv_info, ip6_ra_pool)
1442 : {
1443 11660 : if( !vnet_sw_interface_is_admin_up (vnm, radv_info->sw_if_index))
1444 : {
1445 54 : radv_info->initial_adverts_sent = radv_info->initial_adverts_count-1;
1446 54 : radv_info->next_multicast_time = now;
1447 54 : radv_info->last_multicast_time = now;
1448 54 : radv_info->last_radv_time = 0;
1449 54 : continue;
1450 : }
1451 :
1452 : /* is it time to send a multicast RA on this interface? */
1453 11606 : if(radv_info->send_radv && (now >= radv_info->next_multicast_time))
1454 : {
1455 3 : u32 n_to_alloc = 1;
1456 : u32 n_allocated;
1457 :
1458 6 : f64 rfn = (radv_info->max_radv_interval - radv_info->min_radv_interval) *
1459 3 : random_f64 (&radv_info->seed) + radv_info->min_radv_interval;
1460 :
1461 : /* multicast send - compute next multicast send time */
1462 3 : if( radv_info->initial_adverts_sent > 0)
1463 : {
1464 3 : radv_info->initial_adverts_sent--;
1465 3 : if(rfn > radv_info->initial_adverts_interval)
1466 3 : rfn = radv_info->initial_adverts_interval;
1467 :
1468 : /* check to see if we are ceasing to send */
1469 3 : if( radv_info->initial_adverts_sent == 0)
1470 0 : if(radv_info->cease_radv)
1471 0 : radv_info->send_radv = 0;
1472 : }
1473 :
1474 3 : radv_info->next_multicast_time = rfn + now;
1475 3 : radv_info->last_multicast_time = now;
1476 :
1477 : /* send advert now - build a "solicted" router advert with unspecified source address */
1478 3 : n_allocated = vlib_buffer_alloc (vm, &bo0, n_to_alloc);
1479 :
1480 3 : if (PREDICT_FALSE(n_allocated == 0))
1481 : {
1482 0 : clib_warning ("buffer allocation failure");
1483 0 : continue;
1484 : }
1485 3 : b0 = vlib_get_buffer (vm, bo0);
1486 3 : b0->current_length = sizeof( icmp6_router_solicitation_header_t);
1487 3 : b0->error = ICMP6_ERROR_NONE;
1488 3 : vnet_buffer (b0)->sw_if_index[VLIB_RX] = radv_info->sw_if_index;
1489 :
1490 3 : h0 = vlib_buffer_get_current (b0);
1491 :
1492 3 : clib_memset (h0, 0, sizeof (icmp6_router_solicitation_header_t));
1493 :
1494 3 : h0->ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
1495 3 : h0->ip.payload_length = clib_host_to_net_u16 (sizeof (icmp6_router_solicitation_header_t)
1496 : - STRUCT_OFFSET_OF (icmp6_router_solicitation_header_t, neighbor));
1497 3 : h0->ip.protocol = IP_PROTOCOL_ICMP6;
1498 3 : h0->ip.hop_limit = 255;
1499 :
1500 : /* set src/dst address as "unspecified" this marks this packet as internally generated rather than recieved */
1501 3 : h0->ip.src_address.as_u64[0] = 0;
1502 3 : h0->ip.src_address.as_u64[1] = 0;
1503 :
1504 3 : h0->ip.dst_address.as_u64[0] = 0;
1505 3 : h0->ip.dst_address.as_u64[1] = 0;
1506 :
1507 3 : h0->neighbor.icmp.type = ICMP6_router_solicitation;
1508 :
1509 3 : if (PREDICT_FALSE(f == 0))
1510 : {
1511 3 : f = vlib_get_frame_to_node (vm, ip6_icmp_router_solicitation_node.index);
1512 3 : to_next = vlib_frame_vector_args (f);
1513 3 : n_left_to_next = VLIB_FRAME_SIZE;
1514 3 : n_this_frame = 0;
1515 : }
1516 :
1517 3 : n_this_frame++;
1518 3 : n_left_to_next--;
1519 3 : to_next[0] = bo0;
1520 3 : to_next += 1;
1521 :
1522 3 : if (PREDICT_FALSE(n_left_to_next == 0))
1523 : {
1524 0 : f->n_vectors = n_this_frame;
1525 0 : vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
1526 0 : f = 0;
1527 : }
1528 : }
1529 : }
1530 : /* *INDENT-ON* */
1531 :
1532 6920 : if (f)
1533 : {
1534 3 : ASSERT (n_this_frame);
1535 3 : f->n_vectors = n_this_frame;
1536 3 : vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
1537 : }
1538 6920 : return 0;
1539 : }
1540 :
1541 : static void
1542 5 : ip6_ra_handle_report (ip6_ra_report_t * rap)
1543 : {
1544 : u32 ii;
1545 :
1546 11 : vec_foreach_index (ii, ip6_ra_listeners) ip6_ra_listeners[ii] (rap);
1547 5 : vec_free (rap->prefixes);
1548 5 : clib_mem_free (rap);
1549 5 : }
1550 :
1551 : static uword
1552 559 : ip6_ra_event_process (vlib_main_t * vm,
1553 : vlib_node_runtime_t * node, vlib_frame_t * frame)
1554 : {
1555 : ip6_ra_report_t *r;
1556 : uword event_type;
1557 559 : uword *event_data = 0;
1558 : int i;
1559 :
1560 : /* init code here */
1561 :
1562 : while (1)
1563 : {
1564 7484 : vlib_process_wait_for_event_or_clock (vm, 1. /* seconds */ );
1565 :
1566 6925 : event_type = vlib_process_get_events (vm, &event_data);
1567 :
1568 6925 : if (event_type == ~0)
1569 : {
1570 : /* No events found: timer expired. */
1571 : /* process interface list and send RAs as appropriate, update timer info */
1572 6920 : ip6_ra_process_timer_event (vm, node, frame);
1573 : }
1574 : else
1575 : {
1576 10 : for (i = 0; i < vec_len (event_data); i++)
1577 : {
1578 5 : r = (void *) (event_data[i]);
1579 5 : ip6_ra_handle_report (r);
1580 : }
1581 5 : vec_reset_length (event_data);
1582 : }
1583 : }
1584 : return frame->n_vectors;
1585 : }
1586 :
1587 : /* *INDENT-OFF* */
1588 178120 : VLIB_REGISTER_NODE (ip6_ra_process_node) =
1589 : {
1590 : .function = ip6_ra_event_process,
1591 : .name = "ip6-ra-process",
1592 : .type = VLIB_NODE_TYPE_PROCESS,
1593 : };
1594 : /* *INDENT-ON* */
1595 :
1596 : static void
1597 5 : ip6_ra_signal_report (ip6_ra_report_t * r)
1598 : {
1599 5 : vlib_main_t *vm = vlib_get_main ();
1600 : ip6_ra_report_t *q;
1601 :
1602 5 : if (!vec_len (ip6_ra_listeners))
1603 0 : return;
1604 :
1605 5 : q = clib_mem_alloc (sizeof (*q));
1606 5 : *q = *r;
1607 :
1608 5 : vlib_process_signal_event (vm, ip6_ra_process_node.index, 0, (uword) q);
1609 : }
1610 :
1611 : static int
1612 5 : ip6_ra_publish (ip6_ra_report_t * r)
1613 : {
1614 : void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
1615 5 : vl_api_rpc_call_main_thread (ip6_ra_signal_report, (u8 *) r, sizeof *r);
1616 5 : return 0;
1617 : }
1618 :
1619 : /* API support functions */
1620 : int
1621 185 : ip6_ra_config (vlib_main_t * vm, u32 sw_if_index,
1622 : u8 suppress, u8 managed, u8 other,
1623 : u8 ll_option, u8 send_unicast, u8 cease,
1624 : u8 use_lifetime, u32 lifetime,
1625 : u32 initial_count, u32 initial_interval,
1626 : u32 max_interval, u32 min_interval, u8 is_no)
1627 : {
1628 : ip6_ra_t *radv_info;
1629 :
1630 : /* look up the radv_t information for this interface */
1631 185 : radv_info = ip6_ra_get_itf (sw_if_index);
1632 :
1633 185 : if (!radv_info)
1634 0 : return (VNET_API_ERROR_IP6_NOT_ENABLED);
1635 :
1636 : /* Start off believing that we're going to send radv's */
1637 185 : radv_info->send_radv = 1;
1638 :
1639 185 : if ((max_interval != 0) && (min_interval == 0))
1640 0 : min_interval = .75 * max_interval;
1641 :
1642 185 : max_interval =
1643 : (max_interval !=
1644 : 0) ? ((is_no) ? DEF_MAX_RADV_INTERVAL : max_interval) :
1645 185 : radv_info->max_radv_interval;
1646 185 : min_interval =
1647 : (min_interval !=
1648 : 0) ? ((is_no) ? DEF_MIN_RADV_INTERVAL : min_interval) :
1649 185 : radv_info->min_radv_interval;
1650 185 : lifetime =
1651 : (use_lifetime !=
1652 185 : 0) ? ((is_no) ? DEF_DEF_RTR_LIFETIME : lifetime) :
1653 185 : radv_info->adv_router_lifetime_in_sec;
1654 :
1655 185 : if (lifetime)
1656 : {
1657 185 : if (lifetime > MAX_DEF_RTR_LIFETIME)
1658 0 : lifetime = MAX_DEF_RTR_LIFETIME;
1659 :
1660 185 : if (lifetime <= max_interval)
1661 0 : return VNET_API_ERROR_INVALID_VALUE;
1662 : }
1663 :
1664 185 : if (min_interval != 0)
1665 : {
1666 185 : if ((min_interval > .75 * max_interval) || (min_interval < 3))
1667 0 : return VNET_API_ERROR_INVALID_VALUE;
1668 : }
1669 :
1670 185 : if ((initial_count > MAX_INITIAL_RTR_ADVERTISEMENTS) ||
1671 : (initial_interval > MAX_INITIAL_RTR_ADVERT_INTERVAL))
1672 0 : return VNET_API_ERROR_INVALID_VALUE;
1673 :
1674 : /*
1675 : if "flag" is set and is_no is true then restore default value else set value corresponding to "flag"
1676 : if "flag" is clear don't change corresponding value
1677 : */
1678 185 : radv_info->send_radv =
1679 185 : (suppress != 0) ? ((is_no != 0) ? 1 : 0) : radv_info->send_radv;
1680 185 : radv_info->adv_managed_flag =
1681 185 : (managed != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_managed_flag;
1682 185 : radv_info->adv_other_flag =
1683 185 : (other != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_other_flag;
1684 185 : radv_info->adv_link_layer_address =
1685 185 : (ll_option != 0) ? ((is_no) ? 1 : 0) : radv_info->adv_link_layer_address;
1686 185 : radv_info->send_unicast =
1687 185 : (send_unicast != 0) ? ((is_no) ? 0 : 1) : radv_info->send_unicast;
1688 185 : radv_info->cease_radv =
1689 185 : (cease != 0) ? ((is_no) ? 0 : 1) : radv_info->cease_radv;
1690 :
1691 185 : radv_info->min_radv_interval = min_interval;
1692 185 : radv_info->max_radv_interval = max_interval;
1693 185 : radv_info->adv_router_lifetime_in_sec = lifetime;
1694 :
1695 185 : radv_info->initial_adverts_count =
1696 : (initial_count !=
1697 185 : 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERTISEMENTS : initial_count) :
1698 : radv_info->initial_adverts_count;
1699 185 : radv_info->initial_adverts_interval =
1700 : (initial_interval !=
1701 185 : 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERT_INTERVAL : initial_interval) :
1702 : radv_info->initial_adverts_interval;
1703 :
1704 : /* restart */
1705 185 : if ((cease != 0) && (is_no))
1706 0 : radv_info->send_radv = 1;
1707 :
1708 185 : radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
1709 185 : radv_info->next_multicast_time = vlib_time_now (vm);
1710 185 : radv_info->last_multicast_time = vlib_time_now (vm);
1711 185 : radv_info->last_radv_time = 0;
1712 :
1713 185 : return (0);
1714 : }
1715 :
1716 :
1717 : int
1718 16 : ip6_ra_prefix (vlib_main_t * vm, u32 sw_if_index,
1719 : ip6_address_t * prefix_addr, u8 prefix_len,
1720 : u8 use_default, u32 val_lifetime, u32 pref_lifetime,
1721 : u8 no_advertise, u8 off_link, u8 no_autoconfig,
1722 : u8 no_onlink, u8 is_no)
1723 : {
1724 : ip6_ra_t *radv_info;
1725 :
1726 : /* look up the radv_t information for this interface */
1727 16 : radv_info = ip6_ra_get_itf (sw_if_index);
1728 :
1729 16 : if (!radv_info)
1730 0 : return (VNET_API_ERROR_IP6_NOT_ENABLED);
1731 :
1732 16 : f64 now = vlib_time_now (vm);
1733 :
1734 : /* prefix info add, delete or update */
1735 : ip6_radv_prefix_t *prefix;
1736 :
1737 : /* lookup prefix info for this address on this interface */
1738 16 : uword *p = mhash_get (&radv_info->address_to_prefix_index, prefix_addr);
1739 :
1740 16 : prefix = p ? pool_elt_at_index (radv_info->adv_prefixes_pool, p[0]) : 0;
1741 :
1742 16 : if (is_no)
1743 : {
1744 : /* delete */
1745 6 : if (!prefix)
1746 1 : return VNET_API_ERROR_INVALID_VALUE; /* invalid prefix */
1747 :
1748 5 : if (prefix->prefix_len != prefix_len)
1749 0 : return VNET_API_ERROR_INVALID_VALUE_2;
1750 :
1751 : /* FIXME - Should the DP do this or the CP ? */
1752 : /* do specific delete processing here before returning */
1753 : /* try to remove from routing table */
1754 :
1755 5 : mhash_unset (&radv_info->address_to_prefix_index, prefix_addr,
1756 : /* old_value */ 0);
1757 5 : pool_put (radv_info->adv_prefixes_pool, prefix);
1758 :
1759 5 : radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
1760 5 : radv_info->next_multicast_time = vlib_time_now (vm);
1761 5 : radv_info->last_multicast_time = vlib_time_now (vm);
1762 5 : radv_info->last_radv_time = 0;
1763 5 : return (0);
1764 : }
1765 :
1766 : /* adding or changing */
1767 10 : if (!prefix)
1768 : {
1769 : /* add */
1770 : u32 pi;
1771 5 : pool_get_zero (radv_info->adv_prefixes_pool, prefix);
1772 5 : pi = prefix - radv_info->adv_prefixes_pool;
1773 5 : mhash_set (&radv_info->address_to_prefix_index, prefix_addr, pi,
1774 : /* old_value */ 0);
1775 :
1776 5 : clib_memset (prefix, 0x0, sizeof (ip6_radv_prefix_t));
1777 :
1778 5 : prefix->prefix_len = prefix_len;
1779 5 : clib_memcpy (&prefix->prefix, prefix_addr, sizeof (ip6_address_t));
1780 :
1781 : /* initialize default values */
1782 5 : prefix->adv_on_link_flag = 1; /* L bit set */
1783 5 : prefix->adv_autonomous_flag = 1; /* A bit set */
1784 5 : prefix->adv_valid_lifetime_in_secs = DEF_ADV_VALID_LIFETIME;
1785 5 : prefix->adv_pref_lifetime_in_secs = DEF_ADV_PREF_LIFETIME;
1786 5 : prefix->enabled = 1;
1787 5 : prefix->decrement_lifetime_flag = 1;
1788 5 : prefix->deprecated_prefix_flag = 1;
1789 :
1790 : if (off_link == 0)
1791 : {
1792 : /* FIXME - Should the DP do this or the CP ? */
1793 : /* insert prefix into routing table as a connected prefix */
1794 : }
1795 :
1796 5 : if (use_default)
1797 0 : goto restart;
1798 : }
1799 : else
1800 : {
1801 :
1802 5 : if (prefix->prefix_len != prefix_len)
1803 0 : return VNET_API_ERROR_INVALID_VALUE_2;
1804 :
1805 : if (off_link != 0)
1806 : {
1807 : /* FIXME - Should the DP do this or the CP ? */
1808 : /* remove from routing table if already there */
1809 : }
1810 : }
1811 :
1812 10 : if ((val_lifetime == ~0) || (pref_lifetime == ~0))
1813 : {
1814 9 : prefix->adv_valid_lifetime_in_secs = ~0;
1815 9 : prefix->adv_pref_lifetime_in_secs = ~0;
1816 9 : prefix->decrement_lifetime_flag = 0;
1817 : }
1818 : else
1819 : {
1820 1 : prefix->adv_valid_lifetime_in_secs = val_lifetime;;
1821 1 : prefix->adv_pref_lifetime_in_secs = pref_lifetime;
1822 : }
1823 :
1824 : /* copy remaining */
1825 10 : prefix->enabled = !(no_advertise != 0);
1826 10 : prefix->adv_on_link_flag = !((off_link != 0) || (no_onlink != 0));
1827 10 : prefix->adv_autonomous_flag = !(no_autoconfig != 0);
1828 :
1829 10 : restart:
1830 : /* restart */
1831 : /* fill in the expiration times */
1832 10 : prefix->valid_lifetime_expires = now + prefix->adv_valid_lifetime_in_secs;
1833 10 : prefix->pref_lifetime_expires = now + prefix->adv_pref_lifetime_in_secs;
1834 :
1835 10 : radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
1836 10 : radv_info->next_multicast_time = vlib_time_now (vm);
1837 10 : radv_info->last_multicast_time = vlib_time_now (vm);
1838 10 : radv_info->last_radv_time = 0;
1839 :
1840 10 : return (0);
1841 : }
1842 :
1843 : clib_error_t *
1844 0 : ip6_ra_cmd (vlib_main_t * vm,
1845 : unformat_input_t * main_input, vlib_cli_command_t * cmd)
1846 : {
1847 0 : vnet_main_t *vnm = vnet_get_main ();
1848 0 : clib_error_t *error = 0;
1849 0 : u8 is_no = 0;
1850 0 : u8 suppress = 0, managed = 0, other = 0;
1851 0 : u8 suppress_ll_option = 0, send_unicast = 0, cease = 0;
1852 0 : u8 use_lifetime = 0;
1853 0 : u32 sw_if_index, ra_lifetime = 0, ra_initial_count =
1854 0 : 0, ra_initial_interval = 0;
1855 0 : u32 ra_max_interval = 0, ra_min_interval = 0;
1856 :
1857 0 : unformat_input_t _line_input, *line_input = &_line_input;
1858 :
1859 0 : int add_radv_info = 1;
1860 : ip6_address_t ip6_addr;
1861 : u32 addr_len;
1862 :
1863 :
1864 : /* Get a line of input. */
1865 0 : if (!unformat_user (main_input, unformat_line_input, line_input))
1866 0 : return 0;
1867 :
1868 : /* get basic radv info for this interface */
1869 0 : if (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
1870 : {
1871 :
1872 0 : if (unformat_user (line_input,
1873 : unformat_vnet_sw_interface, vnm, &sw_if_index))
1874 : {
1875 0 : if (!ip6_ra_get_eth_itf (sw_if_index))
1876 : {
1877 : error =
1878 0 : clib_error_return (0, "Interface must be of ethernet type");
1879 0 : goto done;
1880 : }
1881 :
1882 0 : if (!ip6_link_is_enabled (sw_if_index))
1883 : {
1884 0 : error = clib_error_return (0, "IP6 nt enabler interface %U'",
1885 : format_unformat_error, line_input);
1886 0 : goto done;
1887 : }
1888 : }
1889 : else
1890 : {
1891 0 : error = clib_error_return (0, "invalid interface name %U'",
1892 : format_unformat_error, line_input);
1893 0 : goto done;
1894 : }
1895 : }
1896 :
1897 : /* get the rest of the command */
1898 0 : while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
1899 : {
1900 0 : if (unformat (line_input, "no"))
1901 0 : is_no = 1;
1902 0 : else if (unformat (line_input, "prefix %U/%d",
1903 : unformat_ip6_address, &ip6_addr, &addr_len))
1904 : {
1905 0 : add_radv_info = 0;
1906 : }
1907 0 : else if (unformat (line_input, "ra-managed-config-flag"))
1908 : {
1909 0 : managed = 1;
1910 : }
1911 0 : else if (unformat (line_input, "ra-other-config-flag"))
1912 : {
1913 0 : other = 1;
1914 : }
1915 0 : else if (unformat (line_input, "ra-suppress") ||
1916 0 : unformat (line_input, "ra-surpress"))
1917 : {
1918 0 : suppress = 1;
1919 : }
1920 0 : else if (unformat (line_input, "ra-suppress-link-layer") ||
1921 0 : unformat (line_input, "ra-surpress-link-layer"))
1922 : {
1923 0 : suppress_ll_option = 1;
1924 : }
1925 0 : else if (unformat (line_input, "ra-send-unicast"))
1926 : {
1927 0 : send_unicast = 1;
1928 : }
1929 0 : else if (unformat (line_input, "ra-lifetime"))
1930 : {
1931 0 : if (!unformat (line_input, "%d", &ra_lifetime))
1932 : {
1933 0 : error = unformat_parse_error (line_input);
1934 0 : goto done;
1935 : }
1936 0 : use_lifetime = 1;
1937 : }
1938 0 : else if (unformat (line_input, "ra-initial"))
1939 : {
1940 0 : if (!unformat
1941 : (line_input, "%d %d", &ra_initial_count, &ra_initial_interval))
1942 : {
1943 0 : error = unformat_parse_error (line_input);
1944 0 : goto done;
1945 : }
1946 : }
1947 0 : else if (unformat (line_input, "ra-interval"))
1948 : {
1949 0 : if (!unformat (line_input, "%d", &ra_max_interval))
1950 : {
1951 0 : error = unformat_parse_error (line_input);
1952 0 : goto done;
1953 : }
1954 :
1955 0 : if (!unformat (line_input, "%d", &ra_min_interval))
1956 0 : ra_min_interval = 0;
1957 : }
1958 0 : else if (unformat (line_input, "ra-cease"))
1959 : {
1960 0 : cease = 1;
1961 : }
1962 : else
1963 : {
1964 0 : break;
1965 : }
1966 : }
1967 :
1968 0 : if (add_radv_info)
1969 : {
1970 0 : ip6_ra_config (vm, sw_if_index,
1971 : suppress, managed, other,
1972 : suppress_ll_option, send_unicast, cease,
1973 : use_lifetime, ra_lifetime,
1974 : ra_initial_count, ra_initial_interval,
1975 : ra_max_interval, ra_min_interval, is_no);
1976 : }
1977 : else
1978 : {
1979 0 : u32 valid_lifetime_in_secs = 0;
1980 0 : u32 pref_lifetime_in_secs = 0;
1981 0 : u8 use_prefix_default_values = 0;
1982 0 : u8 no_advertise = 0;
1983 0 : u8 off_link = 0;
1984 0 : u8 no_autoconfig = 0;
1985 0 : u8 no_onlink = 0;
1986 :
1987 : /* get the rest of the command */
1988 0 : while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
1989 : {
1990 0 : if (unformat (line_input, "default"))
1991 : {
1992 0 : use_prefix_default_values = 1;
1993 0 : break;
1994 : }
1995 0 : else if (unformat (line_input, "infinite"))
1996 : {
1997 0 : valid_lifetime_in_secs = ~0;
1998 0 : pref_lifetime_in_secs = ~0;
1999 0 : break;
2000 : }
2001 0 : else if (unformat (line_input, "%d %d", &valid_lifetime_in_secs,
2002 : &pref_lifetime_in_secs))
2003 0 : break;
2004 : else
2005 0 : break;
2006 : }
2007 :
2008 :
2009 : /* get the rest of the command */
2010 0 : while (!use_prefix_default_values &&
2011 0 : unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2012 : {
2013 0 : if (unformat (line_input, "no-advertise"))
2014 0 : no_advertise = 1;
2015 0 : else if (unformat (line_input, "off-link"))
2016 0 : off_link = 1;
2017 0 : else if (unformat (line_input, "no-autoconfig"))
2018 0 : no_autoconfig = 1;
2019 0 : else if (unformat (line_input, "no-onlink"))
2020 0 : no_onlink = 1;
2021 : else
2022 : {
2023 0 : error = unformat_parse_error (line_input);
2024 0 : goto done;
2025 : }
2026 : }
2027 :
2028 0 : ip6_ra_prefix (vm, sw_if_index,
2029 : &ip6_addr, addr_len,
2030 : use_prefix_default_values,
2031 : valid_lifetime_in_secs,
2032 : pref_lifetime_in_secs,
2033 : no_advertise, off_link, no_autoconfig, no_onlink, is_no);
2034 : }
2035 :
2036 0 : done:
2037 0 : unformat_free (line_input);
2038 :
2039 0 : return error;
2040 : }
2041 :
2042 : static u8 *
2043 0 : format_ip6_ra (u8 * s, va_list * args)
2044 : {
2045 0 : index_t rai = va_arg (*args, index_t);
2046 0 : u32 indent = va_arg (*args, u32);
2047 : ip6_radv_prefix_t *p;
2048 : ip6_ra_t *radv_info;
2049 :
2050 0 : radv_info = pool_elt_at_index (ip6_ra_pool, rai);
2051 :
2052 0 : s = format (s, "%UAdvertised Prefixes:\n", format_white_space, indent);
2053 :
2054 0 : indent += 2;
2055 :
2056 : /* *INDENT-OFF* */
2057 0 : pool_foreach (p, radv_info->adv_prefixes_pool)
2058 : {
2059 0 : s = format (s, "%Uprefix %U, length %d\n",
2060 : format_white_space, indent+2,
2061 0 : format_ip6_address, &p->prefix, p->prefix_len);
2062 : }
2063 : /* *INDENT-ON* */
2064 :
2065 0 : s = format (s, "%UMTU is %d\n",
2066 : format_white_space, indent, radv_info->adv_link_mtu);
2067 0 : s = format (s, "%UICMP error messages are unlimited\n",
2068 : format_white_space, indent);
2069 0 : s = format (s, "%UICMP redirects are disabled\n",
2070 : format_white_space, indent);
2071 0 : s = format (s, "%UICMP unreachables are not sent\n",
2072 : format_white_space, indent);
2073 0 : s = format (s, "%UND DAD is disabled\n", format_white_space, indent);
2074 : //s = format (s, "%UND reachable time is %d milliseconds\n",);
2075 0 : s = format (s, "%UND advertised reachable time is %d\n",
2076 : format_white_space, indent,
2077 : radv_info->adv_neighbor_reachable_time_in_msec);
2078 0 : s = format (s,
2079 : "%UND advertised retransmit interval is %d (msec)\n",
2080 : format_white_space, indent,
2081 : radv_info->
2082 : adv_time_in_msec_between_retransmitted_neighbor_solicitations);
2083 : s =
2084 0 : format (s,
2085 : "%UND router advertisements are sent every %0.1f seconds (min interval is %0.1f)\n",
2086 : format_white_space, indent, radv_info->max_radv_interval,
2087 : radv_info->min_radv_interval);
2088 : s =
2089 0 : format (s, "%UND router advertisements live for %d seconds\n",
2090 : format_white_space, indent,
2091 0 : radv_info->adv_router_lifetime_in_sec);
2092 : s =
2093 0 : format (s, "%UHosts %s stateless autoconfig for addresses\n",
2094 : format_white_space, indent,
2095 0 : (radv_info->adv_managed_flag) ? "use" : " don't use");
2096 : s =
2097 0 : format (s, "%UND router advertisements sent %d\n", format_white_space,
2098 : indent, radv_info->n_advertisements_sent);
2099 : s =
2100 0 : format (s, "%UND router solicitations received %d\n", format_white_space,
2101 : indent, radv_info->n_solicitations_rcvd);
2102 : s =
2103 0 : format (s, "%UND router solicitations dropped %d\n", format_white_space,
2104 : indent, radv_info->n_solicitations_dropped);
2105 :
2106 0 : return (s);
2107 : }
2108 :
2109 : /*?
2110 : * This command is used to configure the neighbor discovery
2111 : * parameters on a given interface. Use the '<em>show ip6 interface</em>'
2112 : * command to display some of the current neighbor discovery parameters
2113 : * on a given interface. This command has three formats:
2114 : *
2115 : *
2116 : * <b>Format 1 - Router Advertisement Options:</b> (Only one can be entered in
2117 : * a single command)
2118 : *
2119 : * @clistart
2120 : * ip6 nd <interface> [no] [ra-managed-config-flag] |
2121 : * [ra-other-config-flag] | [ra-suppress] | [ra-suppress-link-layer] |
2122 : * [ra-send-unicast] | [ra-lifetime <lifetime>] |
2123 : * [ra-initial <cnt> <interval>] |
2124 : * [ra-interval <max-interval> [<min-interval>]] | [ra-cease]
2125 : * @cliend
2126 : *
2127 : * Where:
2128 : *
2129 : * <em>[no] ra-managed-config-flag</em> - Advertises in ICMPv6
2130 : * router-advertisement messages to use stateful address
2131 : * auto-configuration to obtain address information (sets the M-bit).
2132 : * Default is the M-bit is not set and the '<em>no</em>' option
2133 : * returns it to this default state.
2134 : *
2135 : * <em>[no] ra-other-config-flag</em> - Indicates in ICMPv6
2136 : * router-advertisement messages that hosts use stateful auto
2137 : * configuration to obtain nonaddress related information (sets
2138 : * the O-bit). Default is the O-bit is not set and the '<em>no</em>'
2139 : * option returns it to this default state.
2140 : *
2141 : * <em>[no] ra-suppress</em> - Disables sending ICMPv6 router-advertisement
2142 : * messages. The '<em>no</em>' option implies to enable sending ICMPv6
2143 : * router-advertisement messages.
2144 : *
2145 : * <em>[no] ra-suppress-link-layer</em> - Indicates not to include the
2146 : * optional source link-layer address in the ICMPv6 router-advertisement
2147 : * messages. Default is to include the optional source link-layer address
2148 : * and the '<em>no</em>' option returns it to this default state.
2149 : *
2150 : * <em>[no] ra-send-unicast</em> - Use the source address of the
2151 : * router-solicitation message if available. The default is to use
2152 : * multicast address of all nodes, and the '<em>no</em>' option returns
2153 : * it to this default state.
2154 : *
2155 : * <em>[no] ra-lifetime <lifetime></em> - Advertises the lifetime of a
2156 : * default router in ICMPv6 router-advertisement messages. The range is
2157 : * from 0 to 9000 seconds. '<em><lifetime></em>' must be greater than
2158 : * '<em><max-interval></em>'. The default value is 600 seconds and the
2159 : * '<em>no</em>' option returns it to this default value.
2160 : *
2161 : * <em>[no] ra-initial <cnt> <interval></em> - Number of initial ICMPv6
2162 : * router-advertisement messages sent and the interval between each
2163 : * message. Range for count is 1 - 3 and default is 3. Range for interval
2164 : * is 1 to 16 seconds, and default is 16 seconds. The '<em>no</em>' option
2165 : * returns both to their default value.
2166 : *
2167 : * <em>[no] ra-interval <max-interval> [<min-interval>]</em> - Configures the
2168 : * interval between sending ICMPv6 router-advertisement messages. The
2169 : * range for max-interval is from 4 to 200 seconds. min-interval can not
2170 : * be more than 75% of max-interval. If not set, min-interval will be
2171 : * set to 75% of max-interval. The range for min-interval is from 3 to
2172 : * 150 seconds. The '<em>no</em>' option returns both to their default
2173 : * value.
2174 : *
2175 : * <em>[no] ra-cease</em> - Cease sending ICMPv6 router-advertisement messages.
2176 : * The '<em>no</em>' options implies to start (or restart) sending
2177 : * ICMPv6 router-advertisement messages.
2178 : *
2179 : *
2180 : * <b>Format 2 - Prefix Options:</b>
2181 : *
2182 : * @clistart
2183 : * ip6 nd <interface> [no] prefix <ip6-address>/<width>
2184 : * [<valid-lifetime> <pref-lifetime> | infinite] [no-advertise] [off-link]
2185 : * [no-autoconfig] [no-onlink]
2186 : * @cliend
2187 : *
2188 : * Where:
2189 : *
2190 : * <em>no</em> - All additional flags are ignored and the prefix is deleted.
2191 : *
2192 : * <em><valid-lifetime> <pref-lifetime></em> - '<em><valid-lifetime></em>' is
2193 : * the length of time in seconds during what the prefix is valid for the
2194 : * purpose of on-link determination. Range is 7203 to 2592000 seconds and
2195 : * default is 2592000 seconds (30 days). '<em><pref-lifetime></em>' is the
2196 : * preferred-lifetime and is the length of time in seconds during what
2197 : * addresses generated from the prefix remain preferred. Range is 0 to 604800
2198 : * seconds and default is 604800 seconds (7 days).
2199 : *
2200 : * <em>infinite</em> - Both '<em><valid-lifetime></em>' and
2201 : * '<em><pref-lifetime></em>' are infinite, no timeout.
2202 : *
2203 : * <em>no-advertise</em> - Do not send full router address in prefix
2204 : * advertisement. Default is to advertise (i.e. - This flag is off by default).
2205 : *
2206 : * <em>off-link</em> - Prefix is off-link, clear L-bit in packet. Default is
2207 : * on-link (i.e. - This flag is off and L-bit in packet is set by default
2208 : * and this prefix can be used for on-link determination). '<em>no-onlink</em>'
2209 : * also controls the L-bit.
2210 : *
2211 : * <em>no-autoconfig</em> - Do not use prefix for autoconfiguration, clear
2212 : * A-bit in packet. Default is autoconfig (i.e. - This flag is off and A-bit
2213 : * in packet is set by default.
2214 : *
2215 : * <em>no-onlink</em> - Do not use prefix for onlink determination, clear L-bit
2216 : * in packet. Default is on-link (i.e. - This flag is off and L-bit in packet
2217 : * is set by default and this prefix can be used for on-link determination).
2218 : * '<em>off-link</em>' also controls the L-bit.
2219 : *
2220 : *
2221 : * <b>Format 3: - Default of Prefix:</b>
2222 : *
2223 : * @cliexcmd{ip6 nd <interface> [no] prefix <ip6-address>/<width> default}
2224 : *
2225 : * When a new prefix is added (or existing one is being overwritten)
2226 : * <em>default</em> uses default values for the prefix. If <em>no</em> is
2227 : * used, the <em>default</em> is ignored and the prefix is deleted.
2228 : *
2229 : *
2230 : * @cliexpar
2231 : * Example of how set a router advertisement option:
2232 : * @cliexcmd{ip6 nd GigabitEthernet2/0/0 ra-interval 100 20}
2233 : * Example of how to add a prefix:
2234 : * @cliexcmd{ip6 nd GigabitEthernet2/0/0 prefix fe80::fe:28ff:fe9c:75b3/64
2235 : * infinite no-advertise}
2236 : * Example of how to delete a prefix:
2237 : * @cliexcmd{ip6 nd GigabitEthernet2/0/0 no prefix fe80::fe:28ff:fe9c:75b3/64}
2238 : ?*/
2239 : /* *INDENT-OFF* */
2240 272887 : VLIB_CLI_COMMAND (ip6_nd_command, static) =
2241 : {
2242 : .path = "ip6 nd",
2243 : .short_help = "ip6 nd <interface> ...",
2244 : .function = ip6_ra_cmd,
2245 : };
2246 : /* *INDENT-ON* */
2247 :
2248 : /**
2249 : * VFT for registering as a delegate to an IP6 link
2250 : */
2251 : const static ip6_link_delegate_vft_t ip6_ra_delegate_vft = {
2252 : .ildv_disable = ip6_ra_delegate_disable,
2253 : .ildv_enable = ip6_ra_link_enable,
2254 : .ildv_format = format_ip6_ra,
2255 : };
2256 :
2257 : static clib_error_t *
2258 559 : ip6_ra_init (vlib_main_t * vm)
2259 : {
2260 559 : vlib_call_init_function (vm, icmp6_init);
2261 :
2262 559 : icmp6_register_type (vm, ICMP6_router_solicitation,
2263 : ip6_icmp_router_solicitation_node.index);
2264 559 : icmp6_register_type (vm, ICMP6_router_advertisement,
2265 : ip6_icmp_router_advertisement_node.index);
2266 :
2267 559 : ip6_ra_delegate_id = ip6_link_delegate_register (&ip6_ra_delegate_vft);
2268 :
2269 559 : return (NULL);
2270 : }
2271 :
2272 : /* *INDENT-OFF* */
2273 96319 : VLIB_INIT_FUNCTION (ip6_ra_init) =
2274 : {
2275 : .runs_after = VLIB_INITS("icmp6_init"),
2276 : };
2277 : /* *INDENT-ON* */
2278 :
2279 : /*
2280 : * fd.io coding-style-patch-verification: ON
2281 : *
2282 : * Local Variables:
2283 : * eval: (c-set-style "gnu")
2284 : * End:
2285 : */
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