aboutsummaryrefslogtreecommitdiffstats
path: root/src/vnet/fib/fib_entry.h
blob: 3fde97add327767306305d54f1b855e8688475ff (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
/*
 * Copyright (c) 2016 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef __FIB_ENTRY_H__
#define __FIB_ENTRY_H__

#include <vnet/fib/fib_node.h>
#include <vnet/fib/fib_entry_delegate.h>
#include <vnet/adj/adj.h>
#include <vnet/ip/ip.h>
#include <vnet/dpo/dpo.h>

/**
 * The different sources that can create a route.
 * The sources are defined here the thier relative priority order.
 * The lower the value the higher the priority
 */
typedef enum fib_source_t_ {
    /**
     * Marker. Add new values after this one.
     */
    FIB_SOURCE_FIRST,
    /**
     * Special sources. These are for entries that are added to all
     * FIBs by default, and should never be over-ridden (hence they
     * are the highest priority)
     */
    FIB_SOURCE_SPECIAL = FIB_SOURCE_FIRST,
    /**
     * Classify. A route that links directly to a classify adj
     */
    FIB_SOURCE_CLASSIFY,
    /**
     * A route the is being 'proxied' on behalf of another device
     */
    FIB_SOURCE_PROXY,
    /**
     * Route added as a result of interface configuration.
     * this will also come from the API/CLI, but the distinction is
     * that is from confiiguration on an interface, not a 'ip route' command
     */
    FIB_SOURCE_INTERFACE,
    /**
     * SRv6 and SR-MPLS
     */
    FIB_SOURCE_SR,
    /**
     * A high priority source a plugin can use
     */
    FIB_SOURCE_PLUGIN_HI,
    /**
     * From the BIER subsystem
     */
    FIB_SOURCE_BIER,
    /**
     * From the control plane API
     */
    FIB_SOURCE_API,
    /**
     * From the CLI.
     */
    FIB_SOURCE_CLI,
    /**
     * LISP
     */
    FIB_SOURCE_LISP,
    /**
     * IPv[46] Mapping
     */
    FIB_SOURCE_MAP,
    /**
     * DHCP
     */
    FIB_SOURCE_DHCP,
    /**
     * IPv6 Proxy ND
     */
    FIB_SOURCE_IP6_ND_PROXY,
    /**
     * IPv6 ND (seen in the link-local tables)
     */
    FIB_SOURCE_IP6_ND,
    /**
     * Adjacency source.
     * routes created as a result of ARP/ND entries. This is lower priority
     * then the API/CLI. This is on purpose. trust me.
     */
    FIB_SOURCE_ADJ,
    /**
     * MPLS label. The prefix has been assigned a local label. This source
     * never provides forwarding information, instead it acts as a place-holder
     * so the association of label to prefix can be maintained
     */
    FIB_SOURCE_MPLS,
    /**
     * Attached Export source.
     * routes created as a result of attahced export. routes thus sourced
     * will be present in the export tables
     */
    FIB_SOURCE_AE,
    /**
     * Recursive resolution source.
     * Used to install an entry that is the resolution traget of another.
     */
    FIB_SOURCE_RR,
    /**
     * uRPF bypass/exemption.
     * Used to install an entry that is exempt from the loose uRPF check
     */
    FIB_SOURCE_URPF_EXEMPT,
    /**
     * The default route source.
     * The default route is always added to the FIB table (like the
     * special sources) but we need to be able to over-ride it with
     * 'ip route' sources when provided
     */
    FIB_SOURCE_DEFAULT_ROUTE,
    /**
     * Marker. add new entries before this one.
     */
    FIB_SOURCE_LAST = FIB_SOURCE_DEFAULT_ROUTE,
} __attribute__ ((packed)) fib_source_t;

STATIC_ASSERT (sizeof(fib_source_t) == 1,
	       "FIB too many sources");

/**
 * The maximum number of sources
 */
#define FIB_SOURCE_MAX (FIB_SOURCE_LAST+1)

#define FIB_SOURCES {					\
    [FIB_SOURCE_SPECIAL] = "special",			\
    [FIB_SOURCE_INTERFACE] = "interface",		\
    [FIB_SOURCE_PROXY] = "proxy",                       \
    [FIB_SOURCE_BIER] = "BIER",			        \
    [FIB_SOURCE_API] = "API",			        \
    [FIB_SOURCE_CLI] = "CLI",			        \
    [FIB_SOURCE_ADJ] = "adjacency",			\
    [FIB_SOURCE_MAP] = "MAP",			        \
    [FIB_SOURCE_SR] = "SR",			        \
    [FIB_SOURCE_LISP] = "LISP", 			\
    [FIB_SOURCE_CLASSIFY] = "classify",			\
    [FIB_SOURCE_DHCP] = "DHCP",   			\
    [FIB_SOURCE_IP6_ND_PROXY] = "IPv6-proxy-nd",        \
    [FIB_SOURCE_IP6_ND] = "IPv6-nd",                    \
    [FIB_SOURCE_RR] = "recursive-resolution",	        \
    [FIB_SOURCE_AE] = "attached_export",	        \
    [FIB_SOURCE_MPLS] = "mpls",           	        \
    [FIB_SOURCE_URPF_EXEMPT] = "urpf-exempt",	        \
    [FIB_SOURCE_DEFAULT_ROUTE] = "default-route",	\
}

#define FOR_EACH_FIB_SOURCE(_item) \
    for (_item = FIB_SOURCE_FIRST; _item < FIB_SOURCE_MAX; _item++)

/**
 * The different sources that can create a route.
 * The sources are defined here the thier relative priority order.
 * The lower the value the higher the priority
 */
typedef enum fib_entry_attribute_t_ {
    /**
     * Marker. Add new values after this one.
     */
    FIB_ENTRY_ATTRIBUTE_FIRST,
    /**
     * Connected. The prefix is configured on an interface.
     */
    FIB_ENTRY_ATTRIBUTE_CONNECTED = FIB_ENTRY_ATTRIBUTE_FIRST,
    /**
     * Attached. The prefix is attached to an interface.
     */
    FIB_ENTRY_ATTRIBUTE_ATTACHED,
    /**
     * The route is an explicit drop.
     */
    FIB_ENTRY_ATTRIBUTE_DROP,
    /**
     * The route is exclusive. The client creating the route is
     * providing an exclusive adjacency.
     */
    FIB_ENTRY_ATTRIBUTE_EXCLUSIVE,
    /**
     * The route is attached cross tables and thus imports covered
     * prefixes from the other table.
     */
    FIB_ENTRY_ATTRIBUTE_IMPORT,
    /**
     * The prefix/address is local to this device
     */
    FIB_ENTRY_ATTRIBUTE_LOCAL,
    /**
     * The prefix/address is a multicast prefix.
     *  this aplies only to MPLS. IP multicast is handled by mfib
     */
    FIB_ENTRY_ATTRIBUTE_MULTICAST,
    /**
     * The prefix/address exempted from loose uRPF check
     * To be used with caution
     */
    FIB_ENTRY_ATTRIBUTE_URPF_EXEMPT,
    /**
     * The prefix/address exempted from attached export
     */
    FIB_ENTRY_ATTRIBUTE_NO_ATTACHED_EXPORT,
    /**
     * This FIB entry imposes its source information on all prefixes
     * that is covers
     */
    FIB_ENTRY_ATTRIBUTE_COVERED_INHERIT,
    /**
     * Marker. add new entries before this one.
     */
    FIB_ENTRY_ATTRIBUTE_LAST = FIB_ENTRY_ATTRIBUTE_COVERED_INHERIT,
} fib_entry_attribute_t;

#define FIB_ENTRY_ATTRIBUTES {		       		\
    [FIB_ENTRY_ATTRIBUTE_CONNECTED] = "connected",	\
    [FIB_ENTRY_ATTRIBUTE_ATTACHED]  = "attached",	\
    [FIB_ENTRY_ATTRIBUTE_IMPORT]    = "import",	        \
    [FIB_ENTRY_ATTRIBUTE_DROP]      = "drop",		\
    [FIB_ENTRY_ATTRIBUTE_EXCLUSIVE] = "exclusive",      \
    [FIB_ENTRY_ATTRIBUTE_LOCAL]     = "local",		\
    [FIB_ENTRY_ATTRIBUTE_URPF_EXEMPT] = "uRPF-exempt",  \
    [FIB_ENTRY_ATTRIBUTE_MULTICAST] = "multicast",	\
    [FIB_ENTRY_ATTRIBUTE_NO_ATTACHED_EXPORT] = "no-attached-export",	\
    [FIB_ENTRY_ATTRIBUTE_COVERED_INHERIT] = "covered-inherit",  \
}

#define FOR_EACH_FIB_ATTRIBUTE(_item)			\
    for (_item = FIB_ENTRY_ATTRIBUTE_FIRST;		\
	 _item <= FIB_ENTRY_ATTRIBUTE_LAST;		\
	 _item++)

typedef enum fib_entry_flag_t_ {
    FIB_ENTRY_FLAG_NONE      = 0,
    FIB_ENTRY_FLAG_CONNECTED = (1 << FIB_ENTRY_ATTRIBUTE_CONNECTED),
    FIB_ENTRY_FLAG_ATTACHED  = (1 << FIB_ENTRY_ATTRIBUTE_ATTACHED),
    FIB_ENTRY_FLAG_DROP      = (1 << FIB_ENTRY_ATTRIBUTE_DROP),
    FIB_ENTRY_FLAG_EXCLUSIVE = (1 << FIB_ENTRY_ATTRIBUTE_EXCLUSIVE),
    FIB_ENTRY_FLAG_LOCAL     = (1 << FIB_ENTRY_ATTRIBUTE_LOCAL),
    FIB_ENTRY_FLAG_IMPORT    = (1 << FIB_ENTRY_ATTRIBUTE_IMPORT),
    FIB_ENTRY_FLAG_NO_ATTACHED_EXPORT = (1 << FIB_ENTRY_ATTRIBUTE_NO_ATTACHED_EXPORT),
    FIB_ENTRY_FLAG_LOOSE_URPF_EXEMPT = (1 << FIB_ENTRY_ATTRIBUTE_URPF_EXEMPT),
    FIB_ENTRY_FLAG_MULTICAST = (1 << FIB_ENTRY_ATTRIBUTE_MULTICAST),
    FIB_ENTRY_FLAG_COVERED_INHERIT = (1 << FIB_ENTRY_ATTRIBUTE_COVERED_INHERIT),
} __attribute__((packed)) fib_entry_flag_t;

/**
 * Flags for the source data
 */
typedef enum fib_entry_src_attribute_t_ {
    /**
     * Marker. Add new values after this one.
     */
    FIB_ENTRY_SRC_ATTRIBUTE_FIRST,
    /**
     * the source has been added to the entry
     */
    FIB_ENTRY_SRC_ATTRIBUTE_ADDED = FIB_ENTRY_SRC_ATTRIBUTE_FIRST,
    /**
     * the source is active/best
     */
    FIB_ENTRY_SRC_ATTRIBUTE_ACTIVE,
    /**
     * the source is inherited from its cover
     */
    FIB_ENTRY_SRC_ATTRIBUTE_INHERITED,
    /**
     * Marker. add new entries before this one.
     */
    FIB_ENTRY_SRC_ATTRIBUTE_LAST = FIB_ENTRY_SRC_ATTRIBUTE_INHERITED,
} fib_entry_src_attribute_t;

#define FIB_ENTRY_SRC_ATTRIBUTE_MAX (FIB_ENTRY_SRC_ATTRIBUTE_LAST+1)

#define FIB_ENTRY_SRC_ATTRIBUTES {		 \
    [FIB_ENTRY_SRC_ATTRIBUTE_ADDED]  = "added",	 \
    [FIB_ENTRY_SRC_ATTRIBUTE_ACTIVE] = "active", \
    [FIB_ENTRY_SRC_ATTRIBUTE_INHERITED] = "inherited", \
}

#define FOR_EACH_FIB_SRC_ATTRIBUTE(_item)      		\
    for (_item = FIB_ENTRY_SRC_ATTRIBUTE_FIRST;		\
	 _item < FIB_ENTRY_SRC_ATTRIBUTE_MAX;		\
	 _item++)

typedef enum fib_entry_src_flag_t_ {
    FIB_ENTRY_SRC_FLAG_NONE   = 0,
    FIB_ENTRY_SRC_FLAG_ADDED  = (1 << FIB_ENTRY_SRC_ATTRIBUTE_ADDED),
    FIB_ENTRY_SRC_FLAG_ACTIVE = (1 << FIB_ENTRY_SRC_ATTRIBUTE_ACTIVE),
    FIB_ENTRY_SRC_FLAG_INHERITED = (1 << FIB_ENTRY_SRC_ATTRIBUTE_INHERITED),
} __attribute__ ((packed)) fib_entry_src_flag_t;

/*
 * Keep the size of the flags field to 2 bytes, so it
 * can be placed next to the 2 bytes reference count
 */
STATIC_ASSERT (sizeof(fib_entry_src_flag_t) <= 2,
	       "FIB entry flags field size too big");

/**
 * Information related to the source of a FIB entry
 */
typedef struct fib_entry_src_t_ {
    /**
     * A vector of path extensions
     */
    fib_path_ext_list_t fes_path_exts;

    /**
     * The path-list created by the source
     */
    fib_node_index_t fes_pl;
    /**
     * Which source this info block is for
     */
    fib_source_t fes_src;
    /**
     * Flags on the source
     */
    fib_entry_src_flag_t fes_flags;

    /**
     * 1 bytes ref count. This is not the number of users of the Entry
     * (which is itself not large, due to path-list sharing), but the number
     * of times a given source has been added. Which is even fewer
     */
    u8 fes_ref_count;

    /**
     * Flags the source contributes to the entry
     */
    fib_entry_flag_t fes_entry_flags;
    
    /**
     * Source specific info
     */
    union {
	struct {
	    /**
	     * the index of the FIB entry that is the covering entry
	     */
	    fib_node_index_t fesr_cover;
	    /**
	     * This source's index in the cover's list
	     */
	    u32 fesr_sibling;
	} rr;
	struct {
	    /**
	     * the index of the FIB entry that is the covering entry
	     */
	    fib_node_index_t fesa_cover;
	    /**
	     * This source's index in the cover's list
	     */
	    u32 fesa_sibling;
	} adj;
	struct {
	    /**
	     * the index of the FIB entry that is the covering entry
	     */
	    fib_node_index_t fesi_cover;
	    /**
	     * This source's index in the cover's list
	     */
	    u32 fesi_sibling;
	} interface;
	struct {
	    /**
	     * This MPLS local label associated with the prefix.
	     */
	    mpls_label_t fesm_label;

	    /**
	     * the indicies of the LFIB entries created
	     */
	    fib_node_index_t fesm_lfes[2];
	} mpls;
	struct {
	    /**
	     * The source FIB index.
	     */
            fib_node_index_t fesl_fib_index;
	} lisp;
    };
} fib_entry_src_t;

/**
 * An entry in a FIB table.
 *
 * This entry represents a route added to the FIB that is stored
 * in one of the FIB tables.
 */
typedef struct fib_entry_t_ {
    /**
     * Base class. The entry's node representation in the graph.
     */
    fib_node_t fe_node;
    /**
     * The prefix of the route. this is const just to be sure.
     * It is the entry's key/identity and so should never change.
     */
    const fib_prefix_t fe_prefix;
    /**
     * The index of the FIB table this entry is in
     */
    u32 fe_fib_index;
    /**
     * The load-balance used for forwarding.
     *
     * We don't share the EOS and non-EOS even in case when they could be
     * because:
     *   - complexity & reliability v. memory
     *       determining the conditions where sharing is possible is non-trivial.
     *   - separate LBs means we can get the EOS bit right in the MPLS label DPO
     *     and so save a few clock cycles in the DP imposition node since we can
     *     paint the header straight on without the need to check the packet
     *     type to derive the EOS bit value.
     */
    dpo_id_t fe_lb;
    /**
     * Vector of source infos.
     * Most entries will only have 1 source. So we optimise for memory usage,
     * which is preferable since we have many entries.
     */
    fib_entry_src_t *fe_srcs;
    /**
     * the path-list for which this entry is a child. This is also the path-list
     * that is contributing forwarding for this entry.
     */
    fib_node_index_t fe_parent;
    /**
     * index of this entry in the parent's child list.
     * This is set when this entry is added as a child, but can also
     * be changed by the parent as it manages its list.
     */
    u32 fe_sibling;

    /**
     * A vector of delegates.
     */
    fib_entry_delegate_t *fe_delegates;
} fib_entry_t;

#define FOR_EACH_FIB_ENTRY_FLAG(_item) \
    for (_item = FIB_ENTRY_FLAG_FIRST; _item < FIB_ENTRY_FLAG_MAX; _item++)

#define FIB_ENTRY_FORMAT_BRIEF   (0x0)
#define FIB_ENTRY_FORMAT_DETAIL  (0x1)
#define FIB_ENTRY_FORMAT_DETAIL2 (0x2)

extern u8 *format_fib_entry (u8 * s, va_list * args);
extern u8 *format_fib_source (u8 * s, va_list * args);

extern fib_node_index_t fib_entry_create_special(u32 fib_index,
						 const fib_prefix_t *prefix,
						 fib_source_t source,
						 fib_entry_flag_t flags,
						 const dpo_id_t *dpo);

extern fib_node_index_t fib_entry_create (u32 fib_index,
					  const fib_prefix_t *prefix,
					  fib_source_t source,
					  fib_entry_flag_t flags,
					  const fib_route_path_t *paths);
extern void fib_entry_update (fib_node_index_t fib_entry_index,
			      fib_source_t source,
			      fib_entry_flag_t flags,
			      const fib_route_path_t *paths);

extern void fib_entry_path_add(fib_node_index_t fib_entry_index,
			       fib_source_t source,
			       fib_entry_flag_t flags,
			       const fib_route_path_t *rpath);
extern void fib_entry_special_add(fib_node_index_t fib_entry_index,
				  fib_source_t source,
				  fib_entry_flag_t flags,
				  const dpo_id_t *dpo);
extern void fib_entry_special_update(fib_node_index_t fib_entry_index,
				     fib_source_t source,
				     fib_entry_flag_t flags,
				     const dpo_id_t *dpo);
extern fib_entry_src_flag_t fib_entry_special_remove(fib_node_index_t fib_entry_index,
						     fib_source_t source);

extern fib_entry_src_flag_t fib_entry_path_remove(fib_node_index_t fib_entry_index,
						  fib_source_t source,
						  const fib_route_path_t *rpath);

extern void fib_entry_inherit(fib_node_index_t cover,
                              fib_node_index_t covered);

extern fib_entry_src_flag_t fib_entry_delete(fib_node_index_t fib_entry_index,
					     fib_source_t source);

extern void fib_entry_contribute_urpf(fib_node_index_t path_index,
				      index_t urpf);
extern void fib_entry_contribute_forwarding(
    fib_node_index_t fib_entry_index,
    fib_forward_chain_type_t type,
    dpo_id_t *dpo);
extern const dpo_id_t * fib_entry_contribute_ip_forwarding(
    fib_node_index_t fib_entry_index);
extern adj_index_t fib_entry_get_adj_for_source(
    fib_node_index_t fib_entry_index,
    fib_source_t source);
extern const int fib_entry_get_dpo_for_source (
    fib_node_index_t fib_entry_index,
    fib_source_t source,
    dpo_id_t *dpo);

extern adj_index_t fib_entry_get_adj(fib_node_index_t fib_entry_index);

extern int fib_entry_cmp_for_sort(void *i1, void *i2);

extern void fib_entry_cover_changed(fib_node_index_t fib_entry);
extern void fib_entry_cover_updated(fib_node_index_t fib_entry);
extern int fib_entry_recursive_loop_detect(fib_node_index_t entry_index,
					   fib_node_index_t **entry_indicies);

extern void fib_entry_lock(fib_node_index_t fib_entry_index);
extern void fib_entry_unlock(fib_node_index_t fib_entry_index);

extern u32 fib_entry_child_add(fib_node_index_t fib_entry_index,
			       fib_node_type_t type,
			       fib_node_index_t child_index);
extern void fib_entry_child_remove(fib_node_index_t fib_entry_index,
				   u32 sibling_index);
extern u32 fib_entry_get_resolving_interface(fib_node_index_t fib_entry_index);
extern u32 fib_entry_get_resolving_interface_for_source(
    fib_node_index_t fib_entry_index,
    fib_source_t source);

extern void fib_entry_encode(fib_node_index_t fib_entry_index,
			     fib_route_path_encode_t **api_rpaths);
extern void fib_entry_get_prefix(fib_node_index_t fib_entry_index,
				 fib_prefix_t *pfx);
extern u32 fib_entry_get_fib_index(fib_node_index_t fib_entry_index);
extern void fib_entry_set_source_data(fib_node_index_t fib_entry_index,
                                      fib_source_t source,
                                      const void *data);
extern const void* fib_entry_get_source_data(fib_node_index_t fib_entry_index,
                                             fib_source_t source);

extern fib_entry_flag_t fib_entry_get_flags(fib_node_index_t fib_entry_index);
extern fib_entry_flag_t fib_entry_get_flags_for_source(
    fib_node_index_t fib_entry_index,
    fib_source_t source);
extern fib_source_t fib_entry_get_best_source(fib_node_index_t fib_entry_index);
extern int fib_entry_is_sourced(fib_node_index_t fib_entry_index,
                                fib_source_t source);

extern fib_node_index_t fib_entry_get_path_list(fib_node_index_t fib_entry_index);
extern int fib_entry_is_resolved(fib_node_index_t fib_entry_index);
extern void fib_entry_set_flow_hash_config(fib_node_index_t fib_entry_index,
                                           flow_hash_config_t hash_config);

extern void fib_entry_module_init(void);

/*
 * unsafe... beware the raw pointer.
 */
extern fib_node_index_t fib_entry_get_index(const fib_entry_t * fib_entry);
extern fib_entry_t * fib_entry_get(fib_node_index_t fib_entry_index);

/*
 * for testing purposes.
 */
extern u32 fib_entry_pool_size(void);

#endif