1 /* Zebra next hop tracking code
2 * Copyright (C) 2013 Cumulus Networks, Inc.
4 * This file is part of GNU Zebra.
6 * GNU Zebra is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2, or (at your option) any
11 * GNU Zebra is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with GNU Zebra; see the file COPYING. If not, write to the Free
18 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
30 #include "sockunion.h"
33 #include "workqueue.h"
40 #include "zebra/rib.h"
42 #include "zebra/zserv.h"
43 #include "zebra/zebra_ns.h"
44 #include "zebra/zebra_vrf.h"
45 #include "zebra/redistribute.h"
46 #include "zebra/debug.h"
47 #include "zebra/zebra_rnh.h"
48 #include "zebra/zebra_routemap.h"
49 #include "zebra/interface.h"
50 #include "zebra/zebra_memory.h"
52 static void free_state(vrf_id_t vrf_id
, struct rib
*rib
, struct route_node
*rn
);
53 static void copy_state(struct rnh
*rnh
, struct rib
*rib
,
54 struct route_node
*rn
);
55 #define lookup_rnh_table(v, f) \
57 struct zebra_vrf *zvrf; \
58 struct route_table *t = NULL; \
59 zvrf = zebra_vrf_lookup_by_id(v); \
61 t = zvrf->rnh_table[family2afi(f)]; \
65 static int compare_state(struct rib
*r1
, struct rib
*r2
);
66 static int send_client(struct rnh
*rnh
, struct zserv
*client
, rnh_type_t type
,
68 static void print_rnh(struct route_node
*rn
, struct vty
*vty
);
70 int zebra_rnh_ip_default_route
= 0;
71 int zebra_rnh_ipv6_default_route
= 0;
73 static inline struct route_table
*get_rnh_table(vrf_id_t vrfid
, int family
,
76 struct zebra_vrf
*zvrf
;
77 struct route_table
*t
= NULL
;
79 zvrf
= zebra_vrf_lookup_by_id(vrfid
);
83 case RNH_NEXTHOP_TYPE
:
84 t
= zvrf
->rnh_table
[family2afi(family
)];
86 case RNH_IMPORT_CHECK_TYPE
:
87 t
= zvrf
->import_check_table
[family2afi(family
)];
94 char *rnh_str (struct rnh
*rnh
, char *buf
, int size
)
96 prefix2str(&(rnh
->node
->p
), buf
, size
);
101 zebra_add_rnh (struct prefix
*p
, vrf_id_t vrfid
, rnh_type_t type
)
103 struct route_table
*table
;
104 struct route_node
*rn
;
105 struct rnh
*rnh
= NULL
;
106 char buf
[PREFIX2STR_BUFFER
];
108 if (IS_ZEBRA_DEBUG_NHT
)
110 prefix2str(p
, buf
, sizeof (buf
));
111 zlog_debug("%u: Add RNH %s type %d", vrfid
, buf
, type
);
113 table
= get_rnh_table(vrfid
, PREFIX_FAMILY(p
), type
);
116 prefix2str(p
, buf
, sizeof (buf
));
117 zlog_warn("%u: Add RNH %s type %d - table not found",
122 /* Make it sure prefixlen is applied to the prefix. */
125 /* Lookup (or add) route node.*/
126 rn
= route_node_get (table
, p
);
130 rnh
= XCALLOC(MTYPE_RNH
, sizeof(struct rnh
));
131 rnh
->client_list
= list_new();
133 rnh
->zebra_static_route_list
= list_new();
134 route_lock_node (rn
);
139 route_unlock_node (rn
);
144 zebra_lookup_rnh (struct prefix
*p
, vrf_id_t vrfid
, rnh_type_t type
)
146 struct route_table
*table
;
147 struct route_node
*rn
;
149 table
= get_rnh_table(vrfid
, PREFIX_FAMILY(p
), type
);
153 /* Make it sure prefixlen is applied to the prefix. */
156 /* Lookup route node.*/
157 rn
= route_node_lookup (table
, p
);
161 route_unlock_node (rn
);
166 zebra_free_rnh (struct rnh
*rnh
)
168 rnh
->flags
|= ZEBRA_NHT_DELETED
;
169 list_free (rnh
->client_list
);
170 list_free (rnh
->zebra_static_route_list
);
171 free_state (rnh
->vrf_id
, rnh
->state
, rnh
->node
);
172 XFREE (MTYPE_RNH
, rnh
);
176 zebra_delete_rnh (struct rnh
*rnh
, rnh_type_t type
)
178 struct route_node
*rn
;
180 if (!rnh
|| (rnh
->flags
& ZEBRA_NHT_DELETED
) || !(rn
= rnh
->node
))
183 if (IS_ZEBRA_DEBUG_NHT
)
185 char buf
[PREFIX2STR_BUFFER
];
186 zlog_debug("%u: Del RNH %s type %d",
187 rnh
->vrf_id
, rnh_str(rnh
, buf
, sizeof (buf
)), type
);
190 zebra_free_rnh (rnh
);
192 route_unlock_node (rn
);
196 zebra_add_rnh_client (struct rnh
*rnh
, struct zserv
*client
, rnh_type_t type
,
199 if (IS_ZEBRA_DEBUG_NHT
)
201 char buf
[PREFIX2STR_BUFFER
];
202 zlog_debug("%u: Client %s registers for RNH %s type %d",
203 vrf_id
, zebra_route_string(client
->proto
),
204 rnh_str(rnh
, buf
, sizeof (buf
)), type
);
206 if (!listnode_lookup(rnh
->client_list
, client
))
208 listnode_add(rnh
->client_list
, client
);
209 send_client(rnh
, client
, type
, vrf_id
); // Pending: check if its needed
214 zebra_remove_rnh_client (struct rnh
*rnh
, struct zserv
*client
, rnh_type_t type
)
216 if (IS_ZEBRA_DEBUG_NHT
)
218 char buf
[PREFIX2STR_BUFFER
];
219 zlog_debug("Client %s unregisters for RNH %s type %d",
220 zebra_route_string(client
->proto
),
221 rnh_str(rnh
, buf
, sizeof (buf
)), type
);
223 listnode_delete(rnh
->client_list
, client
);
224 if (list_isempty(rnh
->client_list
) &&
225 list_isempty(rnh
->zebra_static_route_list
))
226 zebra_delete_rnh(rnh
, type
);
230 zebra_register_rnh_static_nh(vrf_id_t vrf_id
, struct prefix
*nh
,
231 struct route_node
*static_rn
)
235 rnh
= zebra_add_rnh(nh
, vrf_id
, RNH_NEXTHOP_TYPE
);
236 if (rnh
&& !listnode_lookup(rnh
->zebra_static_route_list
, static_rn
))
238 listnode_add(rnh
->zebra_static_route_list
, static_rn
);
243 zebra_deregister_rnh_static_nh(vrf_id_t vrf_id
, struct prefix
*nh
,
244 struct route_node
*static_rn
)
248 rnh
= zebra_lookup_rnh(nh
, vrf_id
, RNH_NEXTHOP_TYPE
);
249 if (!rnh
|| (rnh
->flags
& ZEBRA_NHT_DELETED
))
252 listnode_delete(rnh
->zebra_static_route_list
, static_rn
);
254 if (list_isempty(rnh
->client_list
) &&
255 list_isempty(rnh
->zebra_static_route_list
))
256 zebra_delete_rnh(rnh
, RNH_NEXTHOP_TYPE
);
260 zebra_deregister_rnh_static_nexthops (vrf_id_t vrf_id
, struct nexthop
*nexthop
,
261 struct route_node
*rn
)
266 for (nh
= nexthop
; nh
; nh
= nh
->next
)
270 case NEXTHOP_TYPE_IPV4
:
271 case NEXTHOP_TYPE_IPV4_IFINDEX
:
272 nh_p
.family
= AF_INET
;
273 nh_p
.prefixlen
= IPV4_MAX_BITLEN
;
274 nh_p
.u
.prefix4
= nh
->gate
.ipv4
;
276 case NEXTHOP_TYPE_IPV6
:
277 case NEXTHOP_TYPE_IPV6_IFINDEX
:
278 nh_p
.family
= AF_INET6
;
279 nh_p
.prefixlen
= IPV6_MAX_BITLEN
;
280 nh_p
.u
.prefix6
= nh
->gate
.ipv6
;
283 * Not sure what really to do here, we are not
284 * supposed to have either of these for NHT
285 * and the code has no way to know what prefix
286 * to use. So I'm going to just continue
287 * for the moment, which is preferable to
288 * what is currently happening which is a
290 * Some simple testing shows that we
291 * are not leaving slag around for these
292 * skipped static routes. Since
293 * they don't appear to be installed
295 case NEXTHOP_TYPE_IFINDEX
:
296 case NEXTHOP_TYPE_BLACKHOLE
:
300 zebra_deregister_rnh_static_nh(vrf_id
, &nh_p
, rn
);
304 /* Apply the NHT route-map for a client to the route (and nexthops)
308 zebra_rnh_apply_nht_rmap(int family
, struct route_node
*prn
,
309 struct rib
*rib
, int proto
)
311 int at_least_one
= 0;
312 int rmap_family
; /* Route map has diff AF family enum */
313 struct nexthop
*nexthop
;
316 rmap_family
= (family
== AF_INET
) ? AFI_IP
: AFI_IP6
;
320 for (nexthop
= rib
->nexthop
; nexthop
; nexthop
= nexthop
->next
)
322 ret
= zebra_nht_route_map_check(rmap_family
, proto
, &prn
->p
, rib
,
324 if (ret
!= RMAP_DENYMATCH
)
326 SET_FLAG (nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
327 at_least_one
++; /* at least one valid NH */
331 UNSET_FLAG (nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
335 return (at_least_one
);
339 * Determine appropriate route (RIB entry) resolving a tracked entry
340 * (nexthop or BGP route for import).
343 zebra_rnh_resolve_entry (vrf_id_t vrfid
, int family
, rnh_type_t type
,
344 struct route_node
*nrn
, struct rnh
*rnh
,
345 struct route_node
**prn
)
347 struct route_table
*route_table
;
348 struct route_node
*rn
;
353 route_table
= zebra_vrf_table(family2afi(family
), SAFI_UNICAST
, vrfid
);
354 if (!route_table
) // unexpected
357 rn
= route_node_match(route_table
, &nrn
->p
);
361 /* When resolving nexthops, do not resolve via the default route unless
362 * 'ip nht resolve-via-default' is configured.
364 if ((type
== RNH_NEXTHOP_TYPE
) &&
365 (is_default_prefix (&rn
->p
) &&
366 !nh_resolve_via_default(rn
->p
.family
)))
368 else if ((type
== RNH_IMPORT_CHECK_TYPE
) &&
369 CHECK_FLAG(rnh
->flags
, ZEBRA_NHT_EXACT_MATCH
) &&
370 !prefix_same(&nrn
->p
, &rn
->p
))
374 /* Identify appropriate route entry. */
375 RNODE_FOREACH_RIB(rn
, rib
)
377 if (CHECK_FLAG (rib
->status
, RIB_ENTRY_REMOVED
))
379 if (! CHECK_FLAG (rib
->status
, RIB_ENTRY_SELECTED_FIB
))
382 if (CHECK_FLAG(rnh
->flags
, ZEBRA_NHT_CONNECTED
))
384 if (rib
->type
== ZEBRA_ROUTE_CONNECT
)
386 if (rib
->type
== ZEBRA_ROUTE_NHRP
)
388 struct nexthop
*nexthop
;
389 for (nexthop
= rib
->nexthop
; nexthop
; nexthop
= nexthop
->next
)
390 if (nexthop
->type
== NEXTHOP_TYPE_IFINDEX
)
396 else if ((type
== RNH_IMPORT_CHECK_TYPE
) &&
397 (rib
->type
== ZEBRA_ROUTE_BGP
))
404 /* Need to unlock route node */
405 route_unlock_node(rn
);
412 * See if a tracked route entry for import (by BGP) has undergone any
413 * change, and if so, notify the client.
416 zebra_rnh_eval_import_check_entry (vrf_id_t vrfid
, int family
, int force
,
417 struct route_node
*nrn
, struct rnh
*rnh
,
420 int state_changed
= 0;
421 struct zserv
*client
;
422 char bufn
[INET6_ADDRSTRLEN
];
423 struct listnode
*node
;
424 struct nexthop
*nexthop
, *tnexthop
;
427 if (rib
&& (rnh
->state
== NULL
))
429 for (ALL_NEXTHOPS_RO(rib
->nexthop
, nexthop
, tnexthop
, recursing
))
430 if (CHECK_FLAG (nexthop
->flags
, NEXTHOP_FLAG_FIB
))
436 else if (!rib
&& (rnh
->state
!= NULL
))
439 if (compare_state(rib
, rnh
->state
))
440 copy_state(rnh
, rib
, nrn
);
442 if (state_changed
|| force
)
444 if (IS_ZEBRA_DEBUG_NHT
)
446 prefix2str(&nrn
->p
, bufn
, INET6_ADDRSTRLEN
);
447 zlog_debug("%u:%s: Route import check %s %s\n",
448 vrfid
, bufn
, rnh
->state
? "passed" : "failed",
449 state_changed
? "(state changed)" : "");
451 /* state changed, notify clients */
452 for (ALL_LIST_ELEMENTS_RO(rnh
->client_list
, node
, client
))
454 send_client(rnh
, client
, RNH_IMPORT_CHECK_TYPE
, vrfid
);
460 * Notify clients registered for this nexthop about a change.
463 zebra_rnh_notify_protocol_clients (vrf_id_t vrfid
, int family
,
464 struct route_node
*nrn
, struct rnh
*rnh
,
465 struct route_node
*prn
, struct rib
*rib
)
467 struct listnode
*node
;
468 struct zserv
*client
;
469 char bufn
[INET6_ADDRSTRLEN
];
470 char bufp
[INET6_ADDRSTRLEN
];
471 int num_resolving_nh
;
473 if (IS_ZEBRA_DEBUG_NHT
)
475 prefix2str(&nrn
->p
, bufn
, INET6_ADDRSTRLEN
);
478 prefix2str(&prn
->p
, bufp
, INET6_ADDRSTRLEN
);
479 zlog_debug("%u:%s: NH resolved over route %s", vrfid
, bufn
, bufp
);
482 zlog_debug("%u:%s: NH has become unresolved", vrfid
, bufn
);
485 for (ALL_LIST_ELEMENTS_RO(rnh
->client_list
, node
, client
))
489 /* Apply route-map for this client to route resolving this
490 * nexthop to see if it is filtered or not.
492 num_resolving_nh
= zebra_rnh_apply_nht_rmap(family
, prn
, rib
,
494 if (num_resolving_nh
)
495 rnh
->filtered
[client
->proto
] = 0;
497 rnh
->filtered
[client
->proto
] = 1;
499 if (IS_ZEBRA_DEBUG_NHT
)
500 zlog_debug("%u:%s: Notifying client %s about NH %s",
501 vrfid
, bufn
, zebra_route_string(client
->proto
),
502 num_resolving_nh
? "" : "(filtered by route-map)");
506 rnh
->filtered
[client
->proto
] = 0;
507 if (IS_ZEBRA_DEBUG_NHT
)
508 zlog_debug("%u:%s: Notifying client %s about NH (unreachable)",
509 vrfid
, bufn
, zebra_route_string(client
->proto
));
512 send_client(rnh
, client
, RNH_NEXTHOP_TYPE
, vrfid
);
517 zebra_rnh_process_static_routes (vrf_id_t vrfid
, int family
,
518 struct route_node
*nrn
, struct rnh
*rnh
,
519 struct route_node
*prn
, struct rib
*rib
)
521 struct listnode
*node
;
522 int num_resolving_nh
= 0;
523 struct route_node
*static_rn
;
525 struct nexthop
*nexthop
;
526 char bufn
[INET6_ADDRSTRLEN
];
527 char bufp
[INET6_ADDRSTRLEN
];
528 char bufs
[INET6_ADDRSTRLEN
];
530 if (IS_ZEBRA_DEBUG_NHT
)
532 prefix2str(&nrn
->p
, bufn
, INET6_ADDRSTRLEN
);
534 prefix2str(&prn
->p
, bufp
, INET6_ADDRSTRLEN
);
539 /* Apply route-map for "static" to route resolving this
540 * nexthop to see if it is filtered or not.
542 num_resolving_nh
= zebra_rnh_apply_nht_rmap(family
, prn
, rib
,
544 if (num_resolving_nh
)
545 rnh
->filtered
[ZEBRA_ROUTE_STATIC
] = 0;
547 rnh
->filtered
[ZEBRA_ROUTE_STATIC
] = 1;
550 rnh
->filtered
[ZEBRA_ROUTE_STATIC
] = 0;
552 /* Evaluate each static route associated with this nexthop. */
553 for (ALL_LIST_ELEMENTS_RO(rnh
->zebra_static_route_list
, node
,
556 RNODE_FOREACH_RIB(static_rn
, srib
)
558 if (srib
->type
== ZEBRA_ROUTE_STATIC
)
561 /* Set the filter flag for the correct nexthop - static route may
562 * be having multiple. We care here only about registered nexthops.
564 for (nexthop
= srib
->nexthop
; nexthop
; nexthop
= nexthop
->next
)
566 switch (nexthop
->type
)
568 case NEXTHOP_TYPE_IPV4
:
569 case NEXTHOP_TYPE_IPV4_IFINDEX
:
570 if (nexthop
->gate
.ipv4
.s_addr
== nrn
->p
.u
.prefix4
.s_addr
)
572 if (num_resolving_nh
)
573 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FILTERED
);
575 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FILTERED
);
578 case NEXTHOP_TYPE_IPV6
:
579 case NEXTHOP_TYPE_IPV6_IFINDEX
:
581 if (memcmp(&nexthop
->gate
.ipv6
,&nrn
->p
.u
.prefix6
, 16) == 0)
583 if (num_resolving_nh
)
584 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FILTERED
);
586 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FILTERED
);
594 if (IS_ZEBRA_DEBUG_NHT
)
596 prefix2str(&static_rn
->p
, bufs
, INET6_ADDRSTRLEN
);
598 zlog_debug("%u:%s: NH change %s, scheduling static route %s",
599 vrfid
, bufn
, num_resolving_nh
?
600 "" : "(filtered by route-map)", bufs
);
602 zlog_debug("%u:%s: NH unreachable, scheduling static route %s",
606 SET_FLAG(srib
->status
, RIB_ENTRY_CHANGED
);
607 SET_FLAG(srib
->status
, RIB_ENTRY_NEXTHOPS_CHANGED
);
610 rib_queue_add(static_rn
);
615 * See if a tracked nexthop entry has undergone any change, and if so,
616 * take appropriate action; this involves notifying any clients and/or
617 * scheduling dependent static routes for processing.
620 zebra_rnh_eval_nexthop_entry (vrf_id_t vrfid
, int family
, int force
,
621 struct route_node
*nrn
, struct rnh
*rnh
,
622 struct route_node
*prn
, struct rib
*rib
)
624 int state_changed
= 0;
626 /* If we're resolving over a different route, resolution has changed or
627 * the resolving route has some change (e.g., metric), there is a state
630 if (!prefix_same(&rnh
->resolved_route
, &prn
->p
))
633 UNSET_FLAG(rib
->status
, RIB_ENTRY_NEXTHOPS_CHANGED
);
636 prefix_copy(&rnh
->resolved_route
, &prn
->p
);
638 memset(&rnh
->resolved_route
, 0, sizeof(struct prefix
));
640 copy_state(rnh
, rib
, nrn
);
643 else if (compare_state(rib
, rnh
->state
))
646 UNSET_FLAG(rib
->status
, RIB_ENTRY_NEXTHOPS_CHANGED
);
648 copy_state(rnh
, rib
, nrn
);
652 if (state_changed
|| force
)
654 /* NOTE: Use the "copy" of resolving route stored in 'rnh' i.e.,
657 /* Notify registered protocol clients. */
658 zebra_rnh_notify_protocol_clients (vrfid
, family
, nrn
, rnh
,
661 /* Process static routes attached to this nexthop */
662 zebra_rnh_process_static_routes (vrfid
, family
, nrn
, rnh
,
667 /* Evaluate one tracked entry */
669 zebra_rnh_evaluate_entry (vrf_id_t vrfid
, int family
, int force
, rnh_type_t type
,
670 struct route_node
*nrn
)
674 struct route_node
*prn
;
675 char bufn
[INET6_ADDRSTRLEN
];
677 if (IS_ZEBRA_DEBUG_NHT
)
679 prefix2str(&nrn
->p
, bufn
, INET6_ADDRSTRLEN
);
680 zlog_debug("%u:%s: Evaluate RNH, type %d %s",
681 vrfid
, bufn
, type
, force
? "(force)" : "");
686 /* Identify route entry (RIB) resolving this tracked entry. */
687 rib
= zebra_rnh_resolve_entry (vrfid
, family
, type
, nrn
, rnh
, &prn
);
689 /* If the entry cannot be resolved and that is also the existing state,
690 * there is nothing further to do.
692 if (!rib
&& rnh
->state
== NULL
&& !force
)
695 /* Process based on type of entry. */
696 if (type
== RNH_IMPORT_CHECK_TYPE
)
697 zebra_rnh_eval_import_check_entry (vrfid
, family
, force
,
700 zebra_rnh_eval_nexthop_entry (vrfid
, family
, force
,
705 /* Evaluate all tracked entries (nexthops or routes for import into BGP)
706 * of a particular VRF and address-family or a specific prefix.
709 zebra_evaluate_rnh (vrf_id_t vrfid
, int family
, int force
, rnh_type_t type
,
712 struct route_table
*rnh_table
;
713 struct route_node
*nrn
;
715 rnh_table
= get_rnh_table(vrfid
, family
, type
);
716 if (!rnh_table
) // unexpected
721 /* Evaluating a specific entry, make sure it exists. */
722 nrn
= route_node_lookup (rnh_table
, p
);
723 if (nrn
&& nrn
->info
)
724 zebra_rnh_evaluate_entry (vrfid
, family
, force
, type
, nrn
);
726 route_unlock_node (nrn
);
730 /* Evaluate entire table. */
731 nrn
= route_top (rnh_table
);
735 zebra_rnh_evaluate_entry (vrfid
, family
, force
, type
, nrn
);
736 nrn
= route_next(nrn
); /* this will also unlock nrn */
742 zebra_print_rnh_table (vrf_id_t vrfid
, int af
, struct vty
*vty
, rnh_type_t type
)
744 struct route_table
*table
;
745 struct route_node
*rn
;
747 table
= get_rnh_table(vrfid
, af
, type
);
750 zlog_debug("print_rnhs: rnh table not found\n");
754 for (rn
= route_top(table
); rn
; rn
= route_next(rn
))
760 zebra_cleanup_rnh_client (vrf_id_t vrf_id
, int family
, struct zserv
*client
,
763 struct route_table
*ntable
;
764 struct route_node
*nrn
;
767 if (IS_ZEBRA_DEBUG_NHT
)
768 zlog_debug("%u: Client %s RNH cleanup for family %d type %d",
769 vrf_id
, zebra_route_string(client
->proto
), family
, type
);
771 ntable
= get_rnh_table(vrf_id
, family
, type
);
774 zlog_debug("cleanup_rnh_client: rnh table not found\n");
778 for (nrn
= route_top (ntable
); nrn
; nrn
= route_next (nrn
))
784 zebra_remove_rnh_client(rnh
, client
, type
);
790 * free_state - free up the rib structure associated with the rnh.
793 free_state (vrf_id_t vrf_id
, struct rib
*rib
, struct route_node
*rn
)
799 /* free RIB and nexthops */
800 zebra_deregister_rnh_static_nexthops (vrf_id
, rib
->nexthop
, rn
);
801 nexthops_free(rib
->nexthop
);
802 XFREE (MTYPE_RIB
, rib
);
806 copy_state (struct rnh
*rnh
, struct rib
*rib
, struct route_node
*rn
)
813 free_state(rnh
->vrf_id
, rnh
->state
, rn
);
820 state
= XCALLOC (MTYPE_RIB
, sizeof (struct rib
));
821 state
->type
= rib
->type
;
822 state
->metric
= rib
->metric
;
824 for (nh
= rib
->nexthop
; nh
; nh
= nh
->next
)
825 rib_copy_nexthops(state
, nh
);
830 compare_state (struct rib
*r1
, struct rib
*r2
)
836 if ((!r1
&& r2
) || (r1
&& !r2
))
839 if (r1
->metric
!= r2
->metric
)
842 if (r1
->nexthop_num
!= r2
->nexthop_num
)
845 if (CHECK_FLAG(r1
->status
, RIB_ENTRY_NEXTHOPS_CHANGED
))
852 send_client (struct rnh
*rnh
, struct zserv
*client
, rnh_type_t type
, vrf_id_t vrf_id
)
858 struct nexthop
*nexthop
;
859 struct route_node
*rn
;
860 int cmd
= (type
== RNH_IMPORT_CHECK_TYPE
)
861 ? ZEBRA_IMPORT_CHECK_UPDATE
: ZEBRA_NEXTHOP_UPDATE
;
866 /* Get output stream. */
870 zserv_create_header (s
, cmd
, vrf_id
);
872 stream_putw(s
, rn
->p
.family
);
873 switch (rn
->p
.family
)
876 stream_putc(s
, rn
->p
.prefixlen
);
877 stream_put_in_addr(s
, &rn
->p
.u
.prefix4
);
880 stream_putc(s
, rn
->p
.prefixlen
);
881 stream_put(s
, &rn
->p
.u
.prefix6
, IPV6_MAX_BYTELEN
);
884 zlog_err("%s: Unknown family (%d) notification attempted\n",
885 __FUNCTION__
, rn
->p
.family
);
890 stream_putc (s
, rib
->distance
);
891 stream_putl (s
, rib
->metric
);
893 nump
= stream_get_endp(s
);
895 for (nexthop
= rib
->nexthop
; nexthop
; nexthop
= nexthop
->next
)
896 if ((CHECK_FLAG (nexthop
->flags
, NEXTHOP_FLAG_FIB
) ||
897 CHECK_FLAG (nexthop
->flags
, NEXTHOP_FLAG_RECURSIVE
)) &&
898 CHECK_FLAG (nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
))
900 stream_putc (s
, nexthop
->type
);
901 switch (nexthop
->type
)
903 case NEXTHOP_TYPE_IPV4
:
904 stream_put_in_addr (s
, &nexthop
->gate
.ipv4
);
905 stream_putl (s
, nexthop
->ifindex
);
907 case NEXTHOP_TYPE_IFINDEX
:
908 stream_putl (s
, nexthop
->ifindex
);
910 case NEXTHOP_TYPE_IPV4_IFINDEX
:
911 stream_put_in_addr (s
, &nexthop
->gate
.ipv4
);
912 stream_putl (s
, nexthop
->ifindex
);
914 case NEXTHOP_TYPE_IPV6
:
915 stream_put (s
, &nexthop
->gate
.ipv6
, 16);
916 stream_putl (s
, nexthop
->ifindex
);
918 case NEXTHOP_TYPE_IPV6_IFINDEX
:
919 stream_put (s
, &nexthop
->gate
.ipv6
, 16);
920 stream_putl (s
, nexthop
->ifindex
);
928 stream_putc_at (s
, nump
, num
);
932 stream_putc (s
, 0); // distance
933 stream_putl (s
, 0); // metric
934 stream_putc (s
, 0); // nexthops
936 stream_putw_at (s
, 0, stream_get_endp (s
));
938 client
->nh_last_upd_time
= monotime(NULL
);
939 client
->last_write_cmd
= cmd
;
940 return zebra_server_send_message(client
);
944 print_nh (struct nexthop
*nexthop
, struct vty
*vty
)
947 struct zebra_ns
*zns
= zebra_ns_lookup (NS_DEFAULT
);
949 switch (nexthop
->type
)
951 case NEXTHOP_TYPE_IPV4
:
952 case NEXTHOP_TYPE_IPV4_IFINDEX
:
953 vty_out (vty
, " via %s", inet_ntoa (nexthop
->gate
.ipv4
));
954 if (nexthop
->ifindex
)
955 vty_out (vty
, ", %s", ifindex2ifname_per_ns (zns
, nexthop
->ifindex
));
957 case NEXTHOP_TYPE_IPV6
:
958 case NEXTHOP_TYPE_IPV6_IFINDEX
:
960 inet_ntop (AF_INET6
, &nexthop
->gate
.ipv6
, buf
, BUFSIZ
));
961 if (nexthop
->ifindex
)
962 vty_out (vty
, ", via %s", ifindex2ifname_per_ns (zns
, nexthop
->ifindex
));
964 case NEXTHOP_TYPE_IFINDEX
:
965 vty_out (vty
, " is directly connected, %s",
966 ifindex2ifname_per_ns (zns
, nexthop
->ifindex
));
968 case NEXTHOP_TYPE_BLACKHOLE
:
969 vty_out (vty
, " is directly connected, Null0");
974 vty_out(vty
, "%s", VTY_NEWLINE
);
978 print_rnh (struct route_node
*rn
, struct vty
*vty
)
981 struct nexthop
*nexthop
;
982 struct listnode
*node
;
983 struct zserv
*client
;
987 vty_out(vty
, "%s%s%s", inet_ntop(rn
->p
.family
, &rn
->p
.u
.prefix
, buf
, BUFSIZ
),
988 CHECK_FLAG(rnh
->flags
, ZEBRA_NHT_CONNECTED
) ? "(Connected)" : "",
992 vty_out(vty
, " resolved via %s%s",
993 zebra_route_string(rnh
->state
->type
), VTY_NEWLINE
);
994 for (nexthop
= rnh
->state
->nexthop
; nexthop
; nexthop
= nexthop
->next
)
995 print_nh(nexthop
, vty
);
998 vty_out(vty
, " unresolved%s%s",
999 CHECK_FLAG(rnh
->flags
, ZEBRA_NHT_CONNECTED
) ? "(Connected)" : "",
1002 vty_out(vty
, " Client list:");
1003 for (ALL_LIST_ELEMENTS_RO(rnh
->client_list
, node
, client
))
1004 vty_out(vty
, " %s(fd %d)%s", zebra_route_string(client
->proto
),
1005 client
->sock
, rnh
->filtered
[client
->proto
] ? "(filtered)" : "");
1006 if (!list_isempty(rnh
->zebra_static_route_list
))
1007 vty_out(vty
, " zebra%s", rnh
->filtered
[ZEBRA_ROUTE_STATIC
] ? "(filtered)" : "");
1008 vty_out(vty
, "%s", VTY_NEWLINE
);