ip6_fib.c revision 3bab8f9c
1/*
2 * Copyright (c) 2016 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16#include <vnet/fib/ip6_fib.h>
17#include <vnet/fib/fib_table.h>
18#include <vnet/dpo/ip6_ll_dpo.h>
19
20#include <vppinfra/bihash_24_8.h>
21#include <vppinfra/bihash_template.c>
22
23static void
24vnet_ip6_fib_init (u32 fib_index)
25{
26    fib_prefix_t pfx = {
27	.fp_proto = FIB_PROTOCOL_IP6,
28	.fp_len = 0,
29	.fp_addr = {
30	    .ip6 = {
31		{ 0, 0, },
32	    },
33	}
34    };
35
36    /*
37     * Add the default route.
38     */
39    fib_table_entry_special_add(fib_index,
40				&pfx,
41				FIB_SOURCE_DEFAULT_ROUTE,
42				FIB_ENTRY_FLAG_DROP);
43
44    /*
45     * all link local via the link local lookup DPO
46     */
47    pfx.fp_addr.ip6.as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
48    pfx.fp_addr.ip6.as_u64[1] = 0;
49    pfx.fp_len = 10;
50    fib_table_entry_special_dpo_add(fib_index,
51                                    &pfx,
52                                    FIB_SOURCE_SPECIAL,
53                                    FIB_ENTRY_FLAG_NONE,
54                                    ip6_ll_dpo_get());
55}
56
57static u32
58create_fib_with_table_id (u32 table_id,
59                          fib_source_t src,
60                          fib_table_flags_t flags,
61                          u8 *desc)
62{
63    fib_table_t *fib_table;
64    ip6_fib_t *v6_fib;
65
66    pool_get(ip6_main.fibs, fib_table);
67    pool_get_aligned(ip6_main.v6_fibs, v6_fib, CLIB_CACHE_LINE_BYTES);
68
69    clib_memset(fib_table, 0, sizeof(*fib_table));
70    clib_memset(v6_fib, 0, sizeof(*v6_fib));
71
72    ASSERT((fib_table - ip6_main.fibs) ==
73           (v6_fib - ip6_main.v6_fibs));
74
75    fib_table->ft_proto = FIB_PROTOCOL_IP6;
76    fib_table->ft_index =
77	    v6_fib->index =
78                (fib_table - ip6_main.fibs);
79
80    hash_set(ip6_main.fib_index_by_table_id, table_id, fib_table->ft_index);
81
82    fib_table->ft_table_id =
83	v6_fib->table_id =
84	    table_id;
85    fib_table->ft_flow_hash_config = IP_FLOW_HASH_DEFAULT;
86    fib_table->ft_flags = flags;
87    fib_table->ft_desc = desc;
88
89    vnet_ip6_fib_init(fib_table->ft_index);
90    fib_table_lock(fib_table->ft_index, FIB_PROTOCOL_IP6, src);
91
92    return (fib_table->ft_index);
93}
94
95u32
96ip6_fib_table_find_or_create_and_lock (u32 table_id,
97                                       fib_source_t src)
98{
99    uword * p;
100
101    p = hash_get (ip6_main.fib_index_by_table_id, table_id);
102    if (NULL == p)
103	return create_fib_with_table_id(table_id, src,
104                                        FIB_TABLE_FLAG_NONE,
105                                        NULL);
106
107    fib_table_lock(p[0], FIB_PROTOCOL_IP6, src);
108
109    return (p[0]);
110}
111
112u32
113ip6_fib_table_create_and_lock (fib_source_t src,
114                               fib_table_flags_t flags,
115                               u8 *desc)
116{
117    return (create_fib_with_table_id(~0, src, flags, desc));
118}
119
120void
121ip6_fib_table_destroy (u32 fib_index)
122{
123    /*
124     * all link local first ...
125     */
126    fib_prefix_t pfx = {
127	.fp_proto = FIB_PROTOCOL_IP6,
128	.fp_len = 10,
129	.fp_addr = {
130	    .ip6 = {
131                .as_u8 = {
132                    [0] = 0xFE,
133                    [1] = 0x80,
134                },
135	    },
136	}
137    };
138    fib_table_entry_delete(fib_index,
139                           &pfx,
140                           FIB_SOURCE_SPECIAL);
141
142    /*
143     * ... then the default route.
144     */
145    pfx.fp_addr.ip6.as_u64[0] = 0;
146    pfx.fp_len = 00;
147    fib_table_entry_special_remove(fib_index,
148				   &pfx,
149				   FIB_SOURCE_DEFAULT_ROUTE);
150
151    fib_table_t *fib_table = fib_table_get(fib_index, FIB_PROTOCOL_IP6);
152    fib_source_t source;
153
154    /*
155     * validate no more routes.
156     */
157    ASSERT(0 == fib_table->ft_total_route_counts);
158    vec_foreach_index(source, fib_table->ft_src_route_counts)
159    {
160	ASSERT(0 == fib_table->ft_src_route_counts[source]);
161    }
162
163    if (~0 != fib_table->ft_table_id)
164    {
165	hash_unset (ip6_main.fib_index_by_table_id, fib_table->ft_table_id);
166    }
167    vec_free(fib_table->ft_src_route_counts);
168    pool_put_index(ip6_main.v6_fibs, fib_table->ft_index);
169    pool_put(ip6_main.fibs, fib_table);
170}
171
172fib_node_index_t
173ip6_fib_table_lookup (u32 fib_index,
174		      const ip6_address_t *addr,
175		      u32 len)
176{
177    ip6_fib_table_instance_t *table;
178    clib_bihash_kv_24_8_t kv, value;
179    int i, n_p, rv;
180    u64 fib;
181
182    table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
183    n_p = vec_len (table->prefix_lengths_in_search_order);
184
185    kv.key[0] = addr->as_u64[0];
186    kv.key[1] = addr->as_u64[1];
187    fib = ((u64)((fib_index))<<32);
188
189    /*
190     * start search from a mask length same length or shorter.
191     * we don't want matches longer than the mask passed
192     */
193    i = 0;
194    while (i < n_p && table->prefix_lengths_in_search_order[i] > len)
195    {
196        i++;
197    }
198
199    for (; i < n_p; i++)
200    {
201	int dst_address_length = table->prefix_lengths_in_search_order[i];
202	ip6_address_t * mask = &ip6_main.fib_masks[dst_address_length];
203
204	ASSERT(dst_address_length >= 0 && dst_address_length <= 128);
205	//As lengths are decreasing, masks are increasingly specific.
206	kv.key[0] &= mask->as_u64[0];
207	kv.key[1] &= mask->as_u64[1];
208	kv.key[2] = fib | dst_address_length;
209
210	rv = clib_bihash_search_inline_2_24_8(&table->ip6_hash, &kv, &value);
211	if (rv == 0)
212	    return value.value;
213    }
214
215    return (FIB_NODE_INDEX_INVALID);
216}
217
218fib_node_index_t
219ip6_fib_table_lookup_exact_match (u32 fib_index,
220				  const ip6_address_t *addr,
221				  u32 len)
222{
223    ip6_fib_table_instance_t *table;
224    clib_bihash_kv_24_8_t kv, value;
225    ip6_address_t *mask;
226    u64 fib;
227    int rv;
228
229    table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
230    mask = &ip6_main.fib_masks[len];
231    fib = ((u64)((fib_index))<<32);
232
233    kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
234    kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
235    kv.key[2] = fib | len;
236
237    rv = clib_bihash_search_inline_2_24_8(&table->ip6_hash, &kv, &value);
238    if (rv == 0)
239	return value.value;
240
241    return (FIB_NODE_INDEX_INVALID);
242}
243
244static void
245compute_prefix_lengths_in_search_order (ip6_fib_table_instance_t *table)
246{
247    int i;
248    vec_reset_length (table->prefix_lengths_in_search_order);
249    /* Note: bitmap reversed so this is in fact a longest prefix match */
250    clib_bitmap_foreach (i, table->non_empty_dst_address_length_bitmap,
251    ({
252	int dst_address_length = 128 - i;
253	vec_add1(table->prefix_lengths_in_search_order, dst_address_length);
254    }));
255}
256
257void
258ip6_fib_table_entry_remove (u32 fib_index,
259			    const ip6_address_t *addr,
260			    u32 len)
261{
262    ip6_fib_table_instance_t *table;
263    clib_bihash_kv_24_8_t kv;
264    ip6_address_t *mask;
265    u64 fib;
266
267    table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
268    mask = &ip6_main.fib_masks[len];
269    fib = ((u64)((fib_index))<<32);
270
271    kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
272    kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
273    kv.key[2] = fib | len;
274
275    clib_bihash_add_del_24_8(&table->ip6_hash, &kv, 0);
276
277    /* refcount accounting */
278    ASSERT (table->dst_address_length_refcounts[len] > 0);
279    if (--table->dst_address_length_refcounts[len] == 0)
280    {
281	table->non_empty_dst_address_length_bitmap =
282            clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
283                             128 - len, 0);
284	compute_prefix_lengths_in_search_order (table);
285    }
286}
287
288void
289ip6_fib_table_entry_insert (u32 fib_index,
290			    const ip6_address_t *addr,
291			    u32 len,
292			    fib_node_index_t fib_entry_index)
293{
294    ip6_fib_table_instance_t *table;
295    clib_bihash_kv_24_8_t kv;
296    ip6_address_t *mask;
297    u64 fib;
298
299    table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
300    mask = &ip6_main.fib_masks[len];
301    fib = ((u64)((fib_index))<<32);
302
303    kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
304    kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
305    kv.key[2] = fib | len;
306    kv.value = fib_entry_index;
307
308    clib_bihash_add_del_24_8(&table->ip6_hash, &kv, 1);
309
310    table->dst_address_length_refcounts[len]++;
311
312    table->non_empty_dst_address_length_bitmap =
313        clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
314			 128 - len, 1);
315    compute_prefix_lengths_in_search_order (table);
316}
317
318u32 ip6_fib_table_fwding_lookup_with_if_index (ip6_main_t * im,
319					       u32 sw_if_index,
320					       const ip6_address_t * dst)
321{
322    u32 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
323    return ip6_fib_table_fwding_lookup(fib_index, dst);
324}
325
326u32
327ip6_fib_table_get_index_for_sw_if_index (u32 sw_if_index)
328{
329    if (sw_if_index >= vec_len(ip6_main.fib_index_by_sw_if_index))
330    {
331	/*
332	 * This is the case for interfaces that are not yet mapped to
333	 * a IP table
334	 */
335	return (~0);
336    }
337    return (ip6_main.fib_index_by_sw_if_index[sw_if_index]);
338}
339
340void
341ip6_fib_table_fwding_dpo_update (u32 fib_index,
342				 const ip6_address_t *addr,
343				 u32 len,
344				 const dpo_id_t *dpo)
345{
346    ip6_fib_table_instance_t *table;
347    clib_bihash_kv_24_8_t kv;
348    ip6_address_t *mask;
349    u64 fib;
350
351    table = &ip6_main.ip6_table[IP6_FIB_TABLE_FWDING];
352    mask = &ip6_main.fib_masks[len];
353    fib = ((u64)((fib_index))<<32);
354
355    kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
356    kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
357    kv.key[2] = fib | len;
358    kv.value = dpo->dpoi_index;
359
360    clib_bihash_add_del_24_8(&table->ip6_hash, &kv, 1);
361
362    table->dst_address_length_refcounts[len]++;
363
364    table->non_empty_dst_address_length_bitmap =
365        clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
366			 128 - len, 1);
367    compute_prefix_lengths_in_search_order (table);
368}
369
370void
371ip6_fib_table_fwding_dpo_remove (u32 fib_index,
372				 const ip6_address_t *addr,
373				 u32 len,
374				 const dpo_id_t *dpo)
375{
376    ip6_fib_table_instance_t *table;
377    clib_bihash_kv_24_8_t kv;
378    ip6_address_t *mask;
379    u64 fib;
380
381    table = &ip6_main.ip6_table[IP6_FIB_TABLE_FWDING];
382    mask = &ip6_main.fib_masks[len];
383    fib = ((u64)((fib_index))<<32);
384
385    kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
386    kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
387    kv.key[2] = fib | len;
388    kv.value = dpo->dpoi_index;
389
390    clib_bihash_add_del_24_8(&table->ip6_hash, &kv, 0);
391
392    /* refcount accounting */
393    ASSERT (table->dst_address_length_refcounts[len] > 0);
394    if (--table->dst_address_length_refcounts[len] == 0)
395    {
396	table->non_empty_dst_address_length_bitmap =
397            clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
398                             128 - len, 0);
399	compute_prefix_lengths_in_search_order (table);
400    }
401}
402
403/**
404 * @brief Context when walking the IPv6 table. Since all VRFs are in the
405 * same hash table, we need to filter only those we need as we walk
406 */
407typedef struct ip6_fib_walk_ctx_t_
408{
409    u32 i6w_fib_index;
410    fib_table_walk_fn_t i6w_fn;
411    void *i6w_ctx;
412    fib_prefix_t i6w_root;
413    fib_prefix_t *i6w_sub_trees;
414} ip6_fib_walk_ctx_t;
415
416static int
417ip6_fib_walk_cb (clib_bihash_kv_24_8_t * kvp,
418                 void *arg)
419{
420    ip6_fib_walk_ctx_t *ctx = arg;
421    ip6_address_t key;
422
423    if ((kvp->key[2] >> 32) == ctx->i6w_fib_index)
424    {
425        key.as_u64[0] = kvp->key[0];
426        key.as_u64[1] = kvp->key[1];
427
428        if (ip6_destination_matches_route(&ip6_main,
429                                          &key,
430                                          &ctx->i6w_root.fp_addr.ip6,
431                                          ctx->i6w_root.fp_len))
432        {
433            const fib_prefix_t *sub_tree;
434            int skip = 0;
435
436            /*
437             * exclude sub-trees the walk does not want to explore
438             */
439            vec_foreach(sub_tree, ctx->i6w_sub_trees)
440            {
441                if (ip6_destination_matches_route(&ip6_main,
442                                                  &key,
443                                                  &sub_tree->fp_addr.ip6,
444                                                  sub_tree->fp_len))
445                {
446                    skip = 1;
447                    break;
448                }
449            }
450
451            if (!skip)
452            {
453                switch (ctx->i6w_fn(kvp->value, ctx->i6w_ctx))
454                {
455                case FIB_TABLE_WALK_CONTINUE:
456                    break;
457                case FIB_TABLE_WALK_SUB_TREE_STOP: {
458                    fib_prefix_t pfx = {
459                        .fp_proto = FIB_PROTOCOL_IP6,
460                        .fp_len = kvp->key[2] & 0xffffffff,
461                        .fp_addr.ip6 = key,
462                    };
463                    vec_add1(ctx->i6w_sub_trees, pfx);
464                    break;
465                }
466                case FIB_TABLE_WALK_STOP:
467                    goto done;
468                }
469            }
470        }
471    }
472done:
473
474    return (1);
475}
476
477void
478ip6_fib_table_walk (u32 fib_index,
479                    fib_table_walk_fn_t fn,
480                    void *arg)
481{
482    ip6_fib_walk_ctx_t ctx = {
483        .i6w_fib_index = fib_index,
484        .i6w_fn = fn,
485        .i6w_ctx = arg,
486        .i6w_root = {
487            .fp_proto = FIB_PROTOCOL_IP6,
488        },
489        .i6w_sub_trees = NULL,
490    };
491
492    clib_bihash_foreach_key_value_pair_24_8(
493        &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
494        ip6_fib_walk_cb,
495        &ctx);
496
497    vec_free(ctx.i6w_sub_trees);
498}
499
500void
501ip6_fib_table_sub_tree_walk (u32 fib_index,
502                             const fib_prefix_t *root,
503                             fib_table_walk_fn_t fn,
504                             void *arg)
505{
506    ip6_fib_walk_ctx_t ctx = {
507        .i6w_fib_index = fib_index,
508        .i6w_fn = fn,
509        .i6w_ctx = arg,
510        .i6w_root = *root,
511    };
512
513    clib_bihash_foreach_key_value_pair_24_8(
514        &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
515        ip6_fib_walk_cb,
516        &ctx);
517}
518
519typedef struct ip6_fib_show_ctx_t_ {
520    fib_node_index_t *entries;
521} ip6_fib_show_ctx_t;
522
523static fib_table_walk_rc_t
524ip6_fib_table_show_walk (fib_node_index_t fib_entry_index,
525                         void *arg)
526{
527    ip6_fib_show_ctx_t *ctx = arg;
528
529    vec_add1(ctx->entries, fib_entry_index);
530
531    return (FIB_TABLE_WALK_CONTINUE);
532}
533
534static void
535ip6_fib_table_show_all (ip6_fib_t *fib,
536			vlib_main_t * vm)
537{
538    fib_node_index_t *fib_entry_index;
539    ip6_fib_show_ctx_t ctx = {
540	.entries = NULL,
541    };
542
543    ip6_fib_table_walk(fib->index, ip6_fib_table_show_walk, &ctx);
544    vec_sort_with_function(ctx.entries, fib_entry_cmp_for_sort);
545
546    vec_foreach(fib_entry_index, ctx.entries)
547    {
548	vlib_cli_output(vm, "%U",
549                        format_fib_entry,
550                        *fib_entry_index,
551                        FIB_ENTRY_FORMAT_BRIEF);
552    }
553
554    vec_free(ctx.entries);
555}
556
557static void
558ip6_fib_table_show_one (ip6_fib_t *fib,
559			vlib_main_t * vm,
560			ip6_address_t *address,
561			u32 mask_len,
562                        int detail)
563{
564    vlib_cli_output(vm, "%U",
565                    format_fib_entry,
566                    ip6_fib_table_lookup(fib->index, address, mask_len),
567                    (detail ?
568                     FIB_ENTRY_FORMAT_DETAIL2:
569                     FIB_ENTRY_FORMAT_DETAIL));
570}
571
572u8 *
573format_ip6_fib_table_memory (u8 * s, va_list * args)
574{
575    uword bytes_inuse;
576
577    bytes_inuse = (alloc_arena_next(&(ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash)) +
578                   alloc_arena_next(&(ip6_main.ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash)));
579
580    s = format(s, "%=30s %=6d %=12ld\n",
581               "IPv6 unicast",
582               pool_elts(ip6_main.fibs),
583               bytes_inuse);
584    return (s);
585}
586
587typedef struct {
588  u32 fib_index;
589  u64 count_by_prefix_length[129];
590} count_routes_in_fib_at_prefix_length_arg_t;
591
592static void
593count_routes_in_fib_at_prefix_length (clib_bihash_kv_24_8_t * kvp,
594                                      void *arg)
595{
596  count_routes_in_fib_at_prefix_length_arg_t * ap = arg;
597  int mask_width;
598
599  if ((kvp->key[2]>>32) != ap->fib_index)
600    return;
601
602  mask_width = kvp->key[2] & 0xFF;
603
604  ap->count_by_prefix_length[mask_width]++;
605}
606
607static clib_error_t *
608ip6_show_fib (vlib_main_t * vm,
609	      unformat_input_t * input,
610	      vlib_cli_command_t * cmd)
611{
612    count_routes_in_fib_at_prefix_length_arg_t _ca, *ca = &_ca;
613    ip6_main_t * im6 = &ip6_main;
614    fib_table_t *fib_table;
615    ip6_fib_t * fib;
616    int verbose, matching;
617    ip6_address_t matching_address;
618    u32 mask_len  = 128;
619    int table_id = -1, fib_index = ~0;
620    int detail = 0;
621    int hash = 0;
622
623    verbose = 1;
624    matching = 0;
625
626    while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
627    {
628	if (unformat (input, "brief")   ||
629	    unformat (input, "summary") ||
630	    unformat (input, "sum"))
631	    verbose = 0;
632
633	else if (unformat (input, "detail")   ||
634                 unformat (input, "det"))
635	    detail = 1;
636
637	else if (unformat (input, "hash") ||
638                 unformat (input, "mem") ||
639                 unformat (input, "memory"))
640	    hash = 1;
641
642	else if (unformat (input, "%U/%d",
643			   unformat_ip6_address, &matching_address, &mask_len))
644	    matching = 1;
645
646	else if (unformat (input, "%U", unformat_ip6_address, &matching_address))
647	    matching = 1;
648
649	else if (unformat (input, "table %d", &table_id))
650	    ;
651	else if (unformat (input, "index %d", &fib_index))
652	    ;
653	else
654	    break;
655    }
656
657    if (hash)
658    {
659        vlib_cli_output (vm, "IPv6 Non-Forwarding Hash Table:\n%U\n",
660                         BV (format_bihash),
661                         &im6->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
662                         detail);
663        vlib_cli_output (vm, "IPv6 Forwarding Hash Table:\n%U\n",
664                         BV (format_bihash),
665                         &im6->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash,
666                         detail);
667        return (NULL);
668    }
669
670    pool_foreach (fib_table, im6->fibs,
671    ({
672        fib_source_t source;
673        u8 *s = NULL;
674
675	fib = pool_elt_at_index(im6->v6_fibs, fib_table->ft_index);
676	if (table_id >= 0 && table_id != (int)fib->table_id)
677	    continue;
678	if (fib_index != ~0 && fib_index != (int)fib->index)
679	    continue;
680        if (fib_table->ft_flags & FIB_TABLE_FLAG_IP6_LL)
681            continue;
682
683	s = format(s, "%U, fib_index:%d, flow hash:[%U] epoch:%d flags:%U locks:[",
684                   format_fib_table_name, fib->index,
685                   FIB_PROTOCOL_IP6,
686                   fib->index,
687                   format_ip_flow_hash_config,
688                   fib_table->ft_flow_hash_config,
689                   fib_table->ft_epoch,
690                   format_fib_table_flags, fib_table->ft_flags);
691
692        vec_foreach_index(source, fib_table->ft_locks)
693        {
694            if (0 != fib_table->ft_locks[source])
695            {
696                s = format(s, "%U:%d, ",
697                           format_fib_source, source,
698                           fib_table->ft_locks[source]);
699            }
700        }
701        s = format (s, "]");
702        vlib_cli_output (vm, "%v", s);
703        vec_free(s);
704
705	/* Show summary? */
706	if (! verbose)
707	{
708	    clib_bihash_24_8_t * h = &im6->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash;
709	    int len;
710
711	    vlib_cli_output (vm, "%=20s%=16s", "Prefix length", "Count");
712
713	    clib_memset (ca, 0, sizeof(*ca));
714	    ca->fib_index = fib->index;
715
716	    clib_bihash_foreach_key_value_pair_24_8
717		(h, count_routes_in_fib_at_prefix_length, ca);
718
719	    for (len = 128; len >= 0; len--)
720            {
721		if (ca->count_by_prefix_length[len])
722		    vlib_cli_output (vm, "%=20d%=16lld",
723				     len, ca->count_by_prefix_length[len]);
724            }
725	    continue;
726	}
727
728	if (!matching)
729	{
730	    ip6_fib_table_show_all(fib, vm);
731	}
732	else
733	{
734	    ip6_fib_table_show_one(fib, vm, &matching_address, mask_len, detail);
735	}
736    }));
737
738    return 0;
739}
740
741/*?
742 * This command displays the IPv6 FIB Tables (VRF Tables) and the route
743 * entries for each table.
744 *
745 * @note This command will run for a long time when the FIB tables are
746 * comprised of millions of entries. For those senarios, consider displaying
747 * in summary mode.
748 *
749 * @cliexpar
750 * @parblock
751 * Example of how to display all the IPv6 FIB tables:
752 * @cliexstart{show ip6 fib}
753 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
754 * @::/0
755 *   unicast-ip6-chain
756 *   [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
757 *     [0] [@0]: dpo-drop ip6
758 * fe80::/10
759 *   unicast-ip6-chain
760 *   [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
761 *     [0] [@2]: dpo-receive
762 * ff02::1/128
763 *   unicast-ip6-chain
764 *   [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
765 *     [0] [@2]: dpo-receive
766 * ff02::2/128
767 *   unicast-ip6-chain
768 *   [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
769 *     [0] [@2]: dpo-receive
770 * ff02::16/128
771 *   unicast-ip6-chain
772 *   [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
773 *     [0] [@2]: dpo-receive
774 * ff02::1:ff00:0/104
775 *   unicast-ip6-chain
776 *   [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
777 *     [0] [@2]: dpo-receive
778 * ipv6-VRF:8, fib_index 1, flow hash: src dst sport dport proto
779 * @::/0
780 *   unicast-ip6-chain
781 *   [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
782 *     [0] [@0]: dpo-drop ip6
783 * @::a:1:1:0:4/126
784 *   unicast-ip6-chain
785 *   [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
786 *     [0] [@4]: ipv6-glean: af_packet0
787 * @::a:1:1:0:7/128
788 *   unicast-ip6-chain
789 *   [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
790 *     [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
791 * fe80::/10
792 *   unicast-ip6-chain
793 *   [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
794 *     [0] [@2]: dpo-receive
795 * fe80::fe:3eff:fe3e:9222/128
796 *   unicast-ip6-chain
797 *   [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
798 *     [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
799 * ff02::1/128
800 *   unicast-ip6-chain
801 *   [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
802 *     [0] [@2]: dpo-receive
803 * ff02::2/128
804 *   unicast-ip6-chain
805 *   [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
806 *     [0] [@2]: dpo-receive
807 * ff02::16/128
808 *   unicast-ip6-chain
809 *   [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
810 *     [0] [@2]: dpo-receive
811 * ff02::1:ff00:0/104
812 *   unicast-ip6-chain
813 *   [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
814 *     [0] [@2]: dpo-receive
815 * @cliexend
816 *
817 * Example of how to display a summary of all IPv6 FIB tables:
818 * @cliexstart{show ip6 fib summary}
819 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
820 *     Prefix length         Count
821 *          128                3
822 *          104                1
823 *          10                 1
824 *           0                 1
825 * ipv6-VRF:8, fib_index 1, flow hash: src dst sport dport proto
826 *     Prefix length         Count
827 *          128                5
828 *          126                1
829 *          104                1
830 *          10                 1
831 *           0                 1
832 * @cliexend
833 * @endparblock
834 ?*/
835/* *INDENT-OFF* */
836VLIB_CLI_COMMAND (ip6_show_fib_command, static) = {
837    .path = "show ip6 fib",
838    .short_help = "show ip6 fib [summary] [table <table-id>] [index <fib-id>] [<ip6-addr>[/<width>]] [detail]",
839    .function = ip6_show_fib,
840};
841/* *INDENT-ON* */
842