1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * INET An implementation of the TCP/IP protocol suite for the LINUX
4 * operating system. INET is implemented using the BSD Socket
5 * interface as the means of communication with the user level.
6 *
7 * Definitions for the Forwarding Information Base.
8 *
9 * Authors: A.N.Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 */
11
12 #ifndef _NET_IP_FIB_H
13 #define _NET_IP_FIB_H
14
15 #include <net/flow.h>
16 #include <linux/seq_file.h>
17 #include <linux/rcupdate.h>
18 #include <net/fib_notifier.h>
19 #include <net/fib_rules.h>
20 #include <net/inet_dscp.h>
21 #include <net/inetpeer.h>
22 #include <linux/percpu.h>
23 #include <linux/notifier.h>
24 #include <linux/refcount.h>
25
26 struct fib_config {
27 u8 fc_dst_len;
28 dscp_t fc_dscp;
29 u8 fc_protocol;
30 u8 fc_scope;
31 u8 fc_type;
32 u8 fc_gw_family;
33 /* 2 bytes unused */
34 u32 fc_table;
35 __be32 fc_dst;
36 union {
37 __be32 fc_gw4;
38 struct in6_addr fc_gw6;
39 };
40 int fc_oif;
41 u32 fc_flags;
42 u32 fc_priority;
43 __be32 fc_prefsrc;
44 u32 fc_nh_id;
45 struct nlattr *fc_mx;
46 struct rtnexthop *fc_mp;
47 int fc_mx_len;
48 int fc_mp_len;
49 u32 fc_flow;
50 u32 fc_nlflags;
51 struct nl_info fc_nlinfo;
52 struct nlattr *fc_encap;
53 u16 fc_encap_type;
54 };
55
56 struct fib_info;
57 struct rtable;
58
59 struct fib_nh_exception {
60 struct fib_nh_exception __rcu *fnhe_next;
61 int fnhe_genid;
62 __be32 fnhe_daddr;
63 u32 fnhe_pmtu;
64 bool fnhe_mtu_locked;
65 __be32 fnhe_gw;
66 unsigned long fnhe_expires;
67 struct rtable __rcu *fnhe_rth_input;
68 struct rtable __rcu *fnhe_rth_output;
69 unsigned long fnhe_stamp;
70 struct rcu_head rcu;
71 };
72
73 struct fnhe_hash_bucket {
74 struct fib_nh_exception __rcu *chain;
75 };
76
77 #define FNHE_HASH_SHIFT 11
78 #define FNHE_HASH_SIZE (1 << FNHE_HASH_SHIFT)
79 #define FNHE_RECLAIM_DEPTH 5
80
81 struct fib_nh_common {
82 struct net_device *nhc_dev;
83 netdevice_tracker nhc_dev_tracker;
84 int nhc_oif;
85 unsigned char nhc_scope;
86 u8 nhc_family;
87 u8 nhc_gw_family;
88 unsigned char nhc_flags;
89 struct lwtunnel_state *nhc_lwtstate;
90
91 union {
92 __be32 ipv4;
93 struct in6_addr ipv6;
94 } nhc_gw;
95
96 int nhc_weight;
97 atomic_t nhc_upper_bound;
98
99 /* v4 specific, but allows fib6_nh with v4 routes */
100 struct rtable __rcu * __percpu *nhc_pcpu_rth_output;
101 struct rtable __rcu *nhc_rth_input;
102 struct fnhe_hash_bucket __rcu *nhc_exceptions;
103 };
104
105 struct fib_nh {
106 struct fib_nh_common nh_common;
107 struct hlist_node nh_hash;
108 struct fib_info *nh_parent;
109 #ifdef CONFIG_IP_ROUTE_CLASSID
110 __u32 nh_tclassid;
111 #endif
112 __be32 nh_saddr;
113 int nh_saddr_genid;
114 #define fib_nh_family nh_common.nhc_family
115 #define fib_nh_dev nh_common.nhc_dev
116 #define fib_nh_dev_tracker nh_common.nhc_dev_tracker
117 #define fib_nh_oif nh_common.nhc_oif
118 #define fib_nh_flags nh_common.nhc_flags
119 #define fib_nh_lws nh_common.nhc_lwtstate
120 #define fib_nh_scope nh_common.nhc_scope
121 #define fib_nh_gw_family nh_common.nhc_gw_family
122 #define fib_nh_gw4 nh_common.nhc_gw.ipv4
123 #define fib_nh_gw6 nh_common.nhc_gw.ipv6
124 #define fib_nh_weight nh_common.nhc_weight
125 #define fib_nh_upper_bound nh_common.nhc_upper_bound
126 };
127
128 /*
129 * This structure contains data shared by many of routes.
130 */
131
132 struct nexthop;
133
134 struct fib_info {
135 struct hlist_node fib_hash;
136 struct hlist_node fib_lhash;
137 struct list_head nh_list;
138 struct net *fib_net;
139 refcount_t fib_treeref;
140 refcount_t fib_clntref;
141 unsigned int fib_flags;
142 unsigned char fib_dead;
143 unsigned char fib_protocol;
144 unsigned char fib_scope;
145 unsigned char fib_type;
146 __be32 fib_prefsrc;
147 u32 fib_tb_id;
148 u32 fib_priority;
149 struct dst_metrics *fib_metrics;
150 #define fib_mtu fib_metrics->metrics[RTAX_MTU-1]
151 #define fib_window fib_metrics->metrics[RTAX_WINDOW-1]
152 #define fib_rtt fib_metrics->metrics[RTAX_RTT-1]
153 #define fib_advmss fib_metrics->metrics[RTAX_ADVMSS-1]
154 int fib_nhs;
155 bool fib_nh_is_v6;
156 bool nh_updated;
157 bool pfsrc_removed;
158 struct nexthop *nh;
159 struct rcu_head rcu;
160 struct fib_nh fib_nh[] __counted_by(fib_nhs);
161 };
162
163
164 #ifdef CONFIG_IP_MULTIPLE_TABLES
165 struct fib_rule;
166 #endif
167
168 struct fib_table;
169 struct fib_result {
170 __be32 prefix;
171 unsigned char prefixlen;
172 unsigned char nh_sel;
173 unsigned char type;
174 unsigned char scope;
175 u32 tclassid;
176 dscp_t dscp;
177 struct fib_nh_common *nhc;
178 struct fib_info *fi;
179 struct fib_table *table;
180 struct hlist_head *fa_head;
181 };
182
183 struct fib_result_nl {
184 __be32 fl_addr; /* To be looked up*/
185 u32 fl_mark;
186 unsigned char fl_tos;
187 unsigned char fl_scope;
188 unsigned char tb_id_in;
189
190 unsigned char tb_id; /* Results */
191 unsigned char prefixlen;
192 unsigned char nh_sel;
193 unsigned char type;
194 unsigned char scope;
195 int err;
196 };
197
198 #ifdef CONFIG_IP_MULTIPLE_TABLES
199 #define FIB_TABLE_HASHSZ 256
200 #else
201 #define FIB_TABLE_HASHSZ 2
202 #endif
203
204 __be32 fib_info_update_nhc_saddr(struct net *net, struct fib_nh_common *nhc,
205 unsigned char scope);
206 __be32 fib_result_prefsrc(struct net *net, struct fib_result *res);
207
208 #define FIB_RES_NHC(res) ((res).nhc)
209 #define FIB_RES_DEV(res) (FIB_RES_NHC(res)->nhc_dev)
210 #define FIB_RES_OIF(res) (FIB_RES_NHC(res)->nhc_oif)
211
212 struct fib_rt_info {
213 struct fib_info *fi;
214 u32 tb_id;
215 __be32 dst;
216 int dst_len;
217 dscp_t dscp;
218 u8 type;
219 u8 offload:1,
220 trap:1,
221 offload_failed:1,
222 unused:5;
223 };
224
225 struct fib_entry_notifier_info {
226 struct fib_notifier_info info; /* must be first */
227 u32 dst;
228 int dst_len;
229 struct fib_info *fi;
230 dscp_t dscp;
231 u8 type;
232 u32 tb_id;
233 };
234
235 struct fib_nh_notifier_info {
236 struct fib_notifier_info info; /* must be first */
237 struct fib_nh *fib_nh;
238 };
239
240 int call_fib4_notifier(struct notifier_block *nb,
241 enum fib_event_type event_type,
242 struct fib_notifier_info *info);
243 int call_fib4_notifiers(struct net *net, enum fib_event_type event_type,
244 struct fib_notifier_info *info);
245
246 int __net_init fib4_notifier_init(struct net *net);
247 void __net_exit fib4_notifier_exit(struct net *net);
248
249 void fib_info_notify_update(struct net *net, struct nl_info *info);
250 int fib_notify(struct net *net, struct notifier_block *nb,
251 struct netlink_ext_ack *extack);
252
253 struct fib_table {
254 struct hlist_node tb_hlist;
255 u32 tb_id;
256 int tb_num_default;
257 struct rcu_head rcu;
258 unsigned long *tb_data;
259 unsigned long __data[];
260 };
261
262 struct fib_dump_filter {
263 u32 table_id;
264 /* filter_set is an optimization that an entry is set */
265 bool filter_set;
266 bool dump_routes;
267 bool dump_exceptions;
268 bool rtnl_held;
269 unsigned char protocol;
270 unsigned char rt_type;
271 unsigned int flags;
272 struct net_device *dev;
273 };
274
275 int fib_table_lookup(struct fib_table *tb, const struct flowi4 *flp,
276 struct fib_result *res, int fib_flags);
277 int fib_table_insert(struct net *, struct fib_table *, struct fib_config *,
278 struct netlink_ext_ack *extack);
279 int fib_table_delete(struct net *, struct fib_table *, struct fib_config *,
280 struct netlink_ext_ack *extack);
281 int fib_table_dump(struct fib_table *table, struct sk_buff *skb,
282 struct netlink_callback *cb, struct fib_dump_filter *filter);
283 int fib_table_flush(struct net *net, struct fib_table *table, bool flush_all);
284 struct fib_table *fib_trie_unmerge(struct fib_table *main_tb);
285 void fib_table_flush_external(struct fib_table *table);
286 void fib_free_table(struct fib_table *tb);
287
288 #ifndef CONFIG_IP_MULTIPLE_TABLES
289
290 #define TABLE_LOCAL_INDEX (RT_TABLE_LOCAL & (FIB_TABLE_HASHSZ - 1))
291 #define TABLE_MAIN_INDEX (RT_TABLE_MAIN & (FIB_TABLE_HASHSZ - 1))
292
293 static inline struct fib_table *fib_get_table(struct net *net, u32 id)
294 {
295 struct hlist_node *tb_hlist;
296 struct hlist_head *ptr;
297
298 ptr = id == RT_TABLE_LOCAL ?
299 &net->ipv4.fib_table_hash[TABLE_LOCAL_INDEX] :
300 &net->ipv4.fib_table_hash[TABLE_MAIN_INDEX];
301
302 tb_hlist = rcu_dereference_rtnl(hlist_first_rcu(ptr));
303
304 return hlist_entry(tb_hlist, struct fib_table, tb_hlist);
305 }
306
307 static inline struct fib_table *fib_new_table(struct net *net, u32 id)
308 {
309 return fib_get_table(net, id);
310 }
311
312 static inline int fib_lookup(struct net *net, const struct flowi4 *flp,
313 struct fib_result *res, unsigned int flags)
314 {
315 struct fib_table *tb;
316 int err = -ENETUNREACH;
317
318 rcu_read_lock();
319
320 tb = fib_get_table(net, RT_TABLE_MAIN);
321 if (tb)
322 err = fib_table_lookup(tb, flp, res, flags | FIB_LOOKUP_NOREF);
323
324 if (err == -EAGAIN)
325 err = -ENETUNREACH;
326
327 rcu_read_unlock();
328
329 return err;
330 }
331
332 static inline bool fib4_has_custom_rules(const struct net *net)
333 {
334 return false;
335 }
336
337 static inline bool fib4_rule_default(const struct fib_rule *rule)
338 {
339 return true;
340 }
341
342 static inline int fib4_rules_dump(struct net *net, struct notifier_block *nb,
343 struct netlink_ext_ack *extack)
344 {
345 return 0;
346 }
347
348 static inline unsigned int fib4_rules_seq_read(struct net *net)
349 {
350 return 0;
351 }
352
353 static inline bool fib4_rules_early_flow_dissect(struct net *net,
354 struct sk_buff *skb,
355 struct flowi4 *fl4,
356 struct flow_keys *flkeys)
357 {
358 return false;
359 }
360 #else /* CONFIG_IP_MULTIPLE_TABLES */
361 int __net_init fib4_rules_init(struct net *net);
362 void __net_exit fib4_rules_exit(struct net *net);
363
364 struct fib_table *fib_new_table(struct net *net, u32 id);
365 struct fib_table *fib_get_table(struct net *net, u32 id);
366
367 int __fib_lookup(struct net *net, struct flowi4 *flp,
368 struct fib_result *res, unsigned int flags);
369
370 static inline int fib_lookup(struct net *net, struct flowi4 *flp,
371 struct fib_result *res, unsigned int flags)
372 {
373 struct fib_table *tb;
374 int err = -ENETUNREACH;
375
376 flags |= FIB_LOOKUP_NOREF;
377 if (net->ipv4.fib_has_custom_rules)
378 return __fib_lookup(net, flp, res, flags);
379
380 rcu_read_lock();
381
382 res->tclassid = 0;
383
384 tb = rcu_dereference_rtnl(net->ipv4.fib_main);
385 if (tb)
386 err = fib_table_lookup(tb, flp, res, flags);
387
388 if (!err)
389 goto out;
390
391 tb = rcu_dereference_rtnl(net->ipv4.fib_default);
392 if (tb)
393 err = fib_table_lookup(tb, flp, res, flags);
394
395 out:
396 if (err == -EAGAIN)
397 err = -ENETUNREACH;
398
399 rcu_read_unlock();
400
401 return err;
402 }
403
404 static inline bool fib4_has_custom_rules(const struct net *net)
405 {
406 return net->ipv4.fib_has_custom_rules;
407 }
408
409 bool fib4_rule_default(const struct fib_rule *rule);
410 int fib4_rules_dump(struct net *net, struct notifier_block *nb,
411 struct netlink_ext_ack *extack);
412 unsigned int fib4_rules_seq_read(struct net *net);
413
414 static inline bool fib4_rules_early_flow_dissect(struct net *net,
415 struct sk_buff *skb,
416 struct flowi4 *fl4,
417 struct flow_keys *flkeys)
418 {
419 unsigned int flag = FLOW_DISSECTOR_F_STOP_AT_ENCAP;
420
421 if (!net->ipv4.fib_rules_require_fldissect)
422 return false;
423
424 memset(flkeys, 0, sizeof(*flkeys));
425 __skb_flow_dissect(net, skb, &flow_keys_dissector,
426 flkeys, NULL, 0, 0, 0, flag);
427
428 fl4->fl4_sport = flkeys->ports.src;
429 fl4->fl4_dport = flkeys->ports.dst;
430 fl4->flowi4_proto = flkeys->basic.ip_proto;
431
432 return true;
433 }
434
435 #endif /* CONFIG_IP_MULTIPLE_TABLES */
436
437 /* Exported by fib_frontend.c */
438 extern const struct nla_policy rtm_ipv4_policy[];
439 void ip_fib_init(void);
440 int fib_gw_from_via(struct fib_config *cfg, struct nlattr *nla,
441 struct netlink_ext_ack *extack);
442 __be32 fib_compute_spec_dst(struct sk_buff *skb);
443 bool fib_info_nh_uses_dev(struct fib_info *fi, const struct net_device *dev);
444 int fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst,
445 u8 tos, int oif, struct net_device *dev,
446 struct in_device *idev, u32 *itag);
447 #ifdef CONFIG_IP_ROUTE_CLASSID
448 static inline int fib_num_tclassid_users(struct net *net)
449 {
450 return atomic_read(&net->ipv4.fib_num_tclassid_users);
451 }
452 #else
453 static inline int fib_num_tclassid_users(struct net *net)
454 {
455 return 0;
456 }
457 #endif
458 int fib_unmerge(struct net *net);
459
460 static inline bool nhc_l3mdev_matches_dev(const struct fib_nh_common *nhc,
461 const struct net_device *dev)
462 {
463 if (nhc->nhc_dev == dev ||
464 l3mdev_master_ifindex_rcu(nhc->nhc_dev) == dev->ifindex)
465 return true;
466
467 return false;
468 }
469
470 /* Exported by fib_semantics.c */
471 int ip_fib_check_default(__be32 gw, struct net_device *dev);
472 int fib_sync_down_dev(struct net_device *dev, unsigned long event, bool force);
473 int fib_sync_down_addr(struct net_device *dev, __be32 local);
474 int fib_sync_up(struct net_device *dev, unsigned char nh_flags);
475 void fib_sync_mtu(struct net_device *dev, u32 orig_mtu);
476 void fib_nhc_update_mtu(struct fib_nh_common *nhc, u32 new, u32 orig);
477
478 /* Fields used for sysctl_fib_multipath_hash_fields.
479 * Common to IPv4 and IPv6.
480 *
481 * Add new fields at the end. This is user API.
482 */
483 #define FIB_MULTIPATH_HASH_FIELD_SRC_IP BIT(0)
484 #define FIB_MULTIPATH_HASH_FIELD_DST_IP BIT(1)
485 #define FIB_MULTIPATH_HASH_FIELD_IP_PROTO BIT(2)
486 #define FIB_MULTIPATH_HASH_FIELD_FLOWLABEL BIT(3)
487 #define FIB_MULTIPATH_HASH_FIELD_SRC_PORT BIT(4)
488 #define FIB_MULTIPATH_HASH_FIELD_DST_PORT BIT(5)
489 #define FIB_MULTIPATH_HASH_FIELD_INNER_SRC_IP BIT(6)
490 #define FIB_MULTIPATH_HASH_FIELD_INNER_DST_IP BIT(7)
491 #define FIB_MULTIPATH_HASH_FIELD_INNER_IP_PROTO BIT(8)
492 #define FIB_MULTIPATH_HASH_FIELD_INNER_FLOWLABEL BIT(9)
493 #define FIB_MULTIPATH_HASH_FIELD_INNER_SRC_PORT BIT(10)
494 #define FIB_MULTIPATH_HASH_FIELD_INNER_DST_PORT BIT(11)
495
496 #define FIB_MULTIPATH_HASH_FIELD_OUTER_MASK \
497 (FIB_MULTIPATH_HASH_FIELD_SRC_IP | \
498 FIB_MULTIPATH_HASH_FIELD_DST_IP | \
499 FIB_MULTIPATH_HASH_FIELD_IP_PROTO | \
500 FIB_MULTIPATH_HASH_FIELD_FLOWLABEL | \
501 FIB_MULTIPATH_HASH_FIELD_SRC_PORT | \
502 FIB_MULTIPATH_HASH_FIELD_DST_PORT)
503
504 #define FIB_MULTIPATH_HASH_FIELD_INNER_MASK \
505 (FIB_MULTIPATH_HASH_FIELD_INNER_SRC_IP | \
506 FIB_MULTIPATH_HASH_FIELD_INNER_DST_IP | \
507 FIB_MULTIPATH_HASH_FIELD_INNER_IP_PROTO | \
508 FIB_MULTIPATH_HASH_FIELD_INNER_FLOWLABEL | \
509 FIB_MULTIPATH_HASH_FIELD_INNER_SRC_PORT | \
510 FIB_MULTIPATH_HASH_FIELD_INNER_DST_PORT)
511
512 #define FIB_MULTIPATH_HASH_FIELD_ALL_MASK \
513 (FIB_MULTIPATH_HASH_FIELD_OUTER_MASK | \
514 FIB_MULTIPATH_HASH_FIELD_INNER_MASK)
515
516 #define FIB_MULTIPATH_HASH_FIELD_DEFAULT_MASK \
517 (FIB_MULTIPATH_HASH_FIELD_SRC_IP | \
518 FIB_MULTIPATH_HASH_FIELD_DST_IP | \
519 FIB_MULTIPATH_HASH_FIELD_IP_PROTO)
520
521 #ifdef CONFIG_IP_ROUTE_MULTIPATH
522 int fib_multipath_hash(const struct net *net, const struct flowi4 *fl4,
523 const struct sk_buff *skb, struct flow_keys *flkeys);
524
525 static void
526 fib_multipath_hash_construct_key(siphash_key_t *key, u32 mp_seed)
527 {
528 u64 mp_seed_64 = mp_seed;
529
530 key->key[0] = (mp_seed_64 << 32) | mp_seed_64;
531 key->key[1] = key->key[0];
532 }
533
534 static inline u32 fib_multipath_hash_from_keys(const struct net *net,
535 struct flow_keys *keys)
536 {
537 siphash_aligned_key_t hash_key;
538 u32 mp_seed;
539
540 mp_seed = READ_ONCE(net->ipv4.sysctl_fib_multipath_hash_seed).mp_seed;
541 fib_multipath_hash_construct_key(&hash_key, mp_seed);
542
543 return flow_hash_from_keys_seed(keys, &hash_key);
544 }
545 #else
546 static inline u32 fib_multipath_hash_from_keys(const struct net *net,
547 struct flow_keys *keys)
548 {
549 return flow_hash_from_keys(keys);
550 }
551 #endif
552
553 int fib_check_nh(struct net *net, struct fib_nh *nh, u32 table, u8 scope,
554 struct netlink_ext_ack *extack);
555 void fib_select_multipath(struct fib_result *res, int hash);
556 void fib_select_path(struct net *net, struct fib_result *res,
557 struct flowi4 *fl4, const struct sk_buff *skb);
558
559 int fib_nh_init(struct net *net, struct fib_nh *fib_nh,
560 struct fib_config *cfg, int nh_weight,
561 struct netlink_ext_ack *extack);
562 void fib_nh_release(struct net *net, struct fib_nh *fib_nh);
563 int fib_nh_common_init(struct net *net, struct fib_nh_common *nhc,
564 struct nlattr *fc_encap, u16 fc_encap_type,
565 void *cfg, gfp_t gfp_flags,
566 struct netlink_ext_ack *extack);
567 void fib_nh_common_release(struct fib_nh_common *nhc);
568
569 /* Exported by fib_trie.c */
570 void fib_alias_hw_flags_set(struct net *net, const struct fib_rt_info *fri);
571 void fib_trie_init(void);
572 struct fib_table *fib_trie_table(u32 id, struct fib_table *alias);
573 bool fib_lookup_good_nhc(const struct fib_nh_common *nhc, int fib_flags,
574 const struct flowi4 *flp);
575
576 static inline void fib_combine_itag(u32 *itag, const struct fib_result *res)
577 {
578 #ifdef CONFIG_IP_ROUTE_CLASSID
579 struct fib_nh_common *nhc = res->nhc;
580 #ifdef CONFIG_IP_MULTIPLE_TABLES
581 u32 rtag;
582 #endif
583 if (nhc->nhc_family == AF_INET) {
584 struct fib_nh *nh;
585
586 nh = container_of(nhc, struct fib_nh, nh_common);
587 *itag = nh->nh_tclassid << 16;
588 } else {
589 *itag = 0;
590 }
591
592 #ifdef CONFIG_IP_MULTIPLE_TABLES
593 rtag = res->tclassid;
594 if (*itag == 0)
595 *itag = (rtag<<16);
596 *itag |= (rtag>>16);
597 #endif
598 #endif
599 }
600
601 void fib_flush(struct net *net);
602 void free_fib_info(struct fib_info *fi);
603
604 static inline void fib_info_hold(struct fib_info *fi)
605 {
606 refcount_inc(&fi->fib_clntref);
607 }
608
609 static inline void fib_info_put(struct fib_info *fi)
610 {
611 if (refcount_dec_and_test(&fi->fib_clntref))
612 free_fib_info(fi);
613 }
614
615 #ifdef CONFIG_PROC_FS
616 int __net_init fib_proc_init(struct net *net);
617 void __net_exit fib_proc_exit(struct net *net);
618 #else
619 static inline int fib_proc_init(struct net *net)
620 {
621 return 0;
622 }
623 static inline void fib_proc_exit(struct net *net)
624 {
625 }
626 #endif
627
628 u32 ip_mtu_from_fib_result(struct fib_result *res, __be32 daddr);
629
630 int ip_valid_fib_dump_req(struct net *net, const struct nlmsghdr *nlh,
631 struct fib_dump_filter *filter,
632 struct netlink_callback *cb);
633
634 int fib_nexthop_info(struct sk_buff *skb, const struct fib_nh_common *nh,
635 u8 rt_family, unsigned char *flags, bool skip_oif);
636 int fib_add_nexthop(struct sk_buff *skb, const struct fib_nh_common *nh,
637 int nh_weight, u8 rt_family, u32 nh_tclassid);
638 #endif /* _NET_FIB_H */
639
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