1 /* Routing Information Base.
2 * Copyright (C) 1997, 98, 99, 2001 Kunihiro Ishiguro
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 along
17 * with this program; see the file COPYING; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
27 #include "zebra_memory.h"
31 #include "sockunion.h"
34 #include "workqueue.h"
40 #include "srcdest_table.h"
42 #include "zebra/rib.h"
44 #include "zebra/zebra_ns.h"
45 #include "zebra/zserv.h"
46 #include "zebra/zebra_vrf.h"
47 #include "zebra/redistribute.h"
48 #include "zebra/zebra_routemap.h"
49 #include "zebra/debug.h"
50 #include "zebra/zebra_rnh.h"
51 #include "zebra/interface.h"
52 #include "zebra/connected.h"
53 #include "zebra/zebra_vxlan.h"
55 DEFINE_HOOK(rib_update
, (struct route_node
* rn
, const char *reason
),
58 /* Should we allow non Quagga processes to delete our routes */
59 extern int allow_delete
;
61 /* Each route type's string and default distance value. */
65 } route_info
[ZEBRA_ROUTE_MAX
] = {
66 [ZEBRA_ROUTE_SYSTEM
] = {ZEBRA_ROUTE_SYSTEM
, 0},
67 [ZEBRA_ROUTE_KERNEL
] = {ZEBRA_ROUTE_KERNEL
, 0},
68 [ZEBRA_ROUTE_CONNECT
] = {ZEBRA_ROUTE_CONNECT
, 0},
69 [ZEBRA_ROUTE_STATIC
] = {ZEBRA_ROUTE_STATIC
, 1},
70 [ZEBRA_ROUTE_RIP
] = {ZEBRA_ROUTE_RIP
, 120},
71 [ZEBRA_ROUTE_RIPNG
] = {ZEBRA_ROUTE_RIPNG
, 120},
72 [ZEBRA_ROUTE_OSPF
] = {ZEBRA_ROUTE_OSPF
, 110},
73 [ZEBRA_ROUTE_OSPF6
] = {ZEBRA_ROUTE_OSPF6
, 110},
74 [ZEBRA_ROUTE_ISIS
] = {ZEBRA_ROUTE_ISIS
, 115},
75 [ZEBRA_ROUTE_BGP
] = {ZEBRA_ROUTE_BGP
, 20 /* IBGP is 200. */},
76 [ZEBRA_ROUTE_PIM
] = {ZEBRA_ROUTE_PIM
, 255},
77 [ZEBRA_ROUTE_EIGRP
] = {ZEBRA_ROUTE_EIGRP
, 90},
78 [ZEBRA_ROUTE_NHRP
] = {ZEBRA_ROUTE_NHRP
, 10},
79 [ZEBRA_ROUTE_HSLS
] = {ZEBRA_ROUTE_HSLS
, 255},
80 [ZEBRA_ROUTE_OLSR
] = {ZEBRA_ROUTE_OLSR
, 255},
81 [ZEBRA_ROUTE_TABLE
] = {ZEBRA_ROUTE_TABLE
, 150},
82 [ZEBRA_ROUTE_LDP
] = {ZEBRA_ROUTE_LDP
, 150},
83 [ZEBRA_ROUTE_VNC
] = {ZEBRA_ROUTE_VNC
, 20},
84 [ZEBRA_ROUTE_VNC_DIRECT
] = {ZEBRA_ROUTE_VNC_DIRECT
, 20},
85 [ZEBRA_ROUTE_VNC_DIRECT_RH
] = {ZEBRA_ROUTE_VNC_DIRECT_RH
, 20},
86 [ZEBRA_ROUTE_BGP_DIRECT
] = {ZEBRA_ROUTE_BGP_DIRECT
, 20},
87 [ZEBRA_ROUTE_BGP_DIRECT_EXT
] = {ZEBRA_ROUTE_BGP_DIRECT_EXT
, 20},
88 [ZEBRA_ROUTE_BABEL
] = {ZEBRA_ROUTE_BABEL
, 100},
89 [ZEBRA_ROUTE_SHARP
] = {ZEBRA_ROUTE_SHARP
, 150},
91 /* no entry/default: 150 */
94 /* RPF lookup behaviour */
95 static enum multicast_mode ipv4_multicast_mode
= MCAST_NO_CONFIG
;
98 static void __attribute__((format(printf
, 5, 6)))
99 _rnode_zlog(const char *_func
, vrf_id_t vrf_id
, struct route_node
*rn
,
100 int priority
, const char *msgfmt
, ...)
102 char buf
[SRCDEST2STR_BUFFER
+ sizeof(" (MRIB)")];
106 va_start(ap
, msgfmt
);
107 vsnprintf(msgbuf
, sizeof(msgbuf
), msgfmt
, ap
);
111 rib_table_info_t
*info
= srcdest_rnode_table_info(rn
);
112 srcdest_rnode2str(rn
, buf
, sizeof(buf
));
114 if (info
->safi
== SAFI_MULTICAST
)
115 strcat(buf
, " (MRIB)");
117 snprintf(buf
, sizeof(buf
), "{(route_node *) NULL}");
120 zlog(priority
, "%s: %d:%s: %s", _func
, vrf_id
, buf
, msgbuf
);
123 #define rnode_debug(node, vrf_id, ...) \
124 _rnode_zlog(__func__, vrf_id, node, LOG_DEBUG, __VA_ARGS__)
125 #define rnode_info(node, ...) \
126 _rnode_zlog(__func__, vrf_id, node, LOG_INFO, __VA_ARGS__)
128 uint8_t route_distance(int type
)
132 if ((unsigned)type
>= array_size(route_info
))
135 distance
= route_info
[type
].distance
;
140 int is_zebra_valid_kernel_table(u_int32_t table_id
)
142 if ((table_id
> ZEBRA_KERNEL_TABLE_MAX
))
146 if ((table_id
== RT_TABLE_UNSPEC
) || (table_id
== RT_TABLE_LOCAL
)
147 || (table_id
== RT_TABLE_COMPAT
))
154 int is_zebra_main_routing_table(u_int32_t table_id
)
156 if ((table_id
== RT_TABLE_MAIN
)
157 || (table_id
== zebrad
.rtm_table_default
))
162 int zebra_check_addr(struct prefix
*p
)
164 if (p
->family
== AF_INET
) {
167 addr
= p
->u
.prefix4
.s_addr
;
170 if (IPV4_NET127(addr
) || IN_CLASSD(addr
)
171 || IPV4_LINKLOCAL(addr
))
174 if (p
->family
== AF_INET6
) {
175 if (IN6_IS_ADDR_LOOPBACK(&p
->u
.prefix6
))
177 if (IN6_IS_ADDR_LINKLOCAL(&p
->u
.prefix6
))
183 /* Add nexthop to the end of a rib node's nexthop list */
184 void route_entry_nexthop_add(struct route_entry
*re
, struct nexthop
*nexthop
)
186 nexthop_add(&re
->nexthop
, nexthop
);
192 * copy_nexthop - copy a nexthop to the rib structure.
194 void route_entry_copy_nexthops(struct route_entry
*re
, struct nexthop
*nh
)
196 assert(!re
->nexthop
);
197 copy_nexthops(&re
->nexthop
, nh
, NULL
);
198 for (struct nexthop
*nexthop
= nh
; nexthop
; nexthop
= nexthop
->next
)
202 /* Delete specified nexthop from the list. */
203 void route_entry_nexthop_delete(struct route_entry
*re
, struct nexthop
*nexthop
)
206 nexthop
->next
->prev
= nexthop
->prev
;
208 nexthop
->prev
->next
= nexthop
->next
;
210 re
->nexthop
= nexthop
->next
;
215 struct nexthop
*route_entry_nexthop_ifindex_add(struct route_entry
*re
,
219 struct nexthop
*nexthop
;
221 nexthop
= nexthop_new();
222 nexthop
->type
= NEXTHOP_TYPE_IFINDEX
;
223 nexthop
->ifindex
= ifindex
;
224 nexthop
->vrf_id
= nh_vrf_id
;
226 route_entry_nexthop_add(re
, nexthop
);
231 struct nexthop
*route_entry_nexthop_ipv4_add(struct route_entry
*re
,
232 struct in_addr
*ipv4
,
236 struct nexthop
*nexthop
;
238 nexthop
= nexthop_new();
239 nexthop
->type
= NEXTHOP_TYPE_IPV4
;
240 nexthop
->vrf_id
= nh_vrf_id
;
241 nexthop
->gate
.ipv4
= *ipv4
;
243 nexthop
->src
.ipv4
= *src
;
245 route_entry_nexthop_add(re
, nexthop
);
250 struct nexthop
*route_entry_nexthop_ipv4_ifindex_add(struct route_entry
*re
,
251 struct in_addr
*ipv4
,
256 struct nexthop
*nexthop
;
257 struct interface
*ifp
;
259 nexthop
= nexthop_new();
260 nexthop
->vrf_id
= nh_vrf_id
;
261 nexthop
->type
= NEXTHOP_TYPE_IPV4_IFINDEX
;
262 nexthop
->gate
.ipv4
= *ipv4
;
264 nexthop
->src
.ipv4
= *src
;
265 nexthop
->ifindex
= ifindex
;
266 ifp
= if_lookup_by_index(nexthop
->ifindex
, nh_vrf_id
);
267 /*Pending: need to think if null ifp here is ok during bootup?
268 There was a crash because ifp here was coming to be NULL */
270 if (connected_is_unnumbered(ifp
) ||
271 CHECK_FLAG(re
->flags
, ZEBRA_FLAG_EVPN_ROUTE
)) {
272 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ONLINK
);
275 route_entry_nexthop_add(re
, nexthop
);
280 struct nexthop
*route_entry_nexthop_ipv6_add(struct route_entry
*re
,
281 struct in6_addr
*ipv6
,
284 struct nexthop
*nexthop
;
286 nexthop
= nexthop_new();
287 nexthop
->vrf_id
= nh_vrf_id
;
288 nexthop
->type
= NEXTHOP_TYPE_IPV6
;
289 nexthop
->gate
.ipv6
= *ipv6
;
291 route_entry_nexthop_add(re
, nexthop
);
296 struct nexthop
*route_entry_nexthop_ipv6_ifindex_add(struct route_entry
*re
,
297 struct in6_addr
*ipv6
,
301 struct nexthop
*nexthop
;
303 nexthop
= nexthop_new();
304 nexthop
->vrf_id
= nh_vrf_id
;
305 nexthop
->type
= NEXTHOP_TYPE_IPV6_IFINDEX
;
306 nexthop
->gate
.ipv6
= *ipv6
;
307 nexthop
->ifindex
= ifindex
;
309 route_entry_nexthop_add(re
, nexthop
);
314 struct nexthop
*route_entry_nexthop_blackhole_add(struct route_entry
*re
,
315 enum blackhole_type bh_type
)
317 struct nexthop
*nexthop
;
319 nexthop
= nexthop_new();
320 nexthop
->vrf_id
= VRF_DEFAULT
;
321 nexthop
->type
= NEXTHOP_TYPE_BLACKHOLE
;
322 nexthop
->bh_type
= bh_type
;
324 route_entry_nexthop_add(re
, nexthop
);
329 static void nexthop_set_resolved(afi_t afi
, struct nexthop
*newhop
,
330 struct nexthop
*nexthop
)
332 struct nexthop
*resolved_hop
;
334 resolved_hop
= nexthop_new();
335 SET_FLAG(resolved_hop
->flags
, NEXTHOP_FLAG_ACTIVE
);
337 resolved_hop
->vrf_id
= nexthop
->vrf_id
;
338 switch (newhop
->type
) {
339 case NEXTHOP_TYPE_IPV4
:
340 case NEXTHOP_TYPE_IPV4_IFINDEX
:
341 /* If the resolving route specifies a gateway, use it */
342 resolved_hop
->type
= newhop
->type
;
343 resolved_hop
->gate
.ipv4
= newhop
->gate
.ipv4
;
345 if (newhop
->ifindex
) {
346 resolved_hop
->type
= NEXTHOP_TYPE_IPV4_IFINDEX
;
347 resolved_hop
->ifindex
= newhop
->ifindex
;
348 if (newhop
->flags
& NEXTHOP_FLAG_ONLINK
)
349 resolved_hop
->flags
|= NEXTHOP_FLAG_ONLINK
;
352 case NEXTHOP_TYPE_IPV6
:
353 case NEXTHOP_TYPE_IPV6_IFINDEX
:
354 resolved_hop
->type
= newhop
->type
;
355 resolved_hop
->gate
.ipv6
= newhop
->gate
.ipv6
;
357 if (newhop
->ifindex
) {
358 resolved_hop
->type
= NEXTHOP_TYPE_IPV6_IFINDEX
;
359 resolved_hop
->ifindex
= newhop
->ifindex
;
362 case NEXTHOP_TYPE_IFINDEX
:
363 /* If the resolving route is an interface route,
364 * it means the gateway we are looking up is connected
365 * to that interface. (The actual network is _not_ onlink).
366 * Therefore, the resolved route should have the original
367 * gateway as nexthop as it is directly connected.
369 * On Linux, we have to set the onlink netlink flag because
370 * otherwise, the kernel won't accept the route.
372 resolved_hop
->flags
|= NEXTHOP_FLAG_ONLINK
;
374 resolved_hop
->type
= NEXTHOP_TYPE_IPV4_IFINDEX
;
375 resolved_hop
->gate
.ipv4
= nexthop
->gate
.ipv4
;
376 } else if (afi
== AFI_IP6
) {
377 resolved_hop
->type
= NEXTHOP_TYPE_IPV6_IFINDEX
;
378 resolved_hop
->gate
.ipv6
= nexthop
->gate
.ipv6
;
380 resolved_hop
->ifindex
= newhop
->ifindex
;
382 case NEXTHOP_TYPE_BLACKHOLE
:
383 resolved_hop
->type
= NEXTHOP_TYPE_BLACKHOLE
;
384 resolved_hop
->bh_type
= nexthop
->bh_type
;
388 /* Copy labels of the resolved route */
389 if (newhop
->nh_label
)
390 nexthop_add_labels(resolved_hop
, newhop
->nh_label_type
,
391 newhop
->nh_label
->num_labels
,
392 &newhop
->nh_label
->label
[0]);
394 resolved_hop
->rparent
= nexthop
;
395 nexthop_add(&nexthop
->resolved
, resolved_hop
);
398 /* If force flag is not set, do not modify falgs at all for uninstall
399 the route from FIB. */
400 static int nexthop_active(afi_t afi
, struct route_entry
*re
,
401 struct nexthop
*nexthop
, int set
,
402 struct route_node
*top
)
405 struct route_table
*table
;
406 struct route_node
*rn
;
407 struct route_entry
*match
= NULL
;
409 struct nexthop
*newhop
;
410 struct interface
*ifp
;
413 if ((nexthop
->type
== NEXTHOP_TYPE_IPV4
)
414 || nexthop
->type
== NEXTHOP_TYPE_IPV6
)
415 nexthop
->ifindex
= 0;
418 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_RECURSIVE
);
419 nexthops_free(nexthop
->resolved
);
420 nexthop
->resolved
= NULL
;
424 /* Skip nexthops that have been filtered out due to route-map */
425 /* The nexthops are specific to this route and so the same */
426 /* nexthop for a different route may not have this flag set */
427 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FILTERED
))
431 * Check to see if we should trust the passed in information
432 * for UNNUMBERED interfaces as that we won't find the GW
433 * address in the routing table.
435 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ONLINK
)) {
436 ifp
= if_lookup_by_index(nexthop
->ifindex
, nexthop
->vrf_id
);
437 if (ifp
&& connected_is_unnumbered(ifp
)) {
438 if (if_is_operative(ifp
))
446 /* Make lookup prefix. */
447 memset(&p
, 0, sizeof(struct prefix
));
451 p
.prefixlen
= IPV4_MAX_PREFIXLEN
;
452 p
.u
.prefix4
= nexthop
->gate
.ipv4
;
456 p
.prefixlen
= IPV6_MAX_PREFIXLEN
;
457 p
.u
.prefix6
= nexthop
->gate
.ipv6
;
460 assert(afi
!= AFI_IP
&& afi
!= AFI_IP6
);
464 table
= zebra_vrf_table(afi
, SAFI_UNICAST
, nexthop
->vrf_id
);
468 rn
= route_node_match(table
, (struct prefix
*)&p
);
470 route_unlock_node(rn
);
472 /* Lookup should halt if we've matched against ourselves ('top',
473 * if specified) - i.e., we cannot have a nexthop NH1 is
474 * resolved by a route NH1. The exception is if the route is a
477 if (top
&& rn
== top
)
478 if (((afi
== AFI_IP
) && (rn
->p
.prefixlen
!= 32)) ||
479 ((afi
== AFI_IP6
) && (rn
->p
.prefixlen
!= 128)))
482 /* Pick up selected route. */
483 /* However, do not resolve over default route unless explicitly
485 if (is_default_prefix(&rn
->p
)
486 && !rnh_resolve_via_default(p
.family
))
489 dest
= rib_dest_from_rnode(rn
);
490 if (dest
&& dest
->selected_fib
&&
491 !CHECK_FLAG(dest
->selected_fib
->status
,
492 ROUTE_ENTRY_REMOVED
) &&
493 dest
->selected_fib
->type
!= ZEBRA_ROUTE_TABLE
)
494 match
= dest
->selected_fib
;
496 /* If there is no selected route or matched route is EGP, go up
501 } while (rn
&& rn
->info
== NULL
);
508 if (match
->type
== ZEBRA_ROUTE_CONNECT
) {
509 /* Directly point connected route. */
510 newhop
= match
->nexthop
;
512 if (nexthop
->type
== NEXTHOP_TYPE_IPV4
513 || nexthop
->type
== NEXTHOP_TYPE_IPV6
)
514 nexthop
->ifindex
= newhop
->ifindex
;
517 } else if (CHECK_FLAG(re
->flags
, ZEBRA_FLAG_ALLOW_RECURSION
)) {
519 for (ALL_NEXTHOPS(match
->nexthop
, newhop
)) {
520 if (!CHECK_FLAG(newhop
->flags
,
523 if (CHECK_FLAG(newhop
->flags
,
524 NEXTHOP_FLAG_RECURSIVE
))
528 SET_FLAG(nexthop
->flags
,
529 NEXTHOP_FLAG_RECURSIVE
);
531 ROUTE_ENTRY_NEXTHOPS_CHANGED
);
532 nexthop_set_resolved(afi
, newhop
,
538 re
->nexthop_mtu
= match
->mtu
;
540 } else if (re
->type
== ZEBRA_ROUTE_STATIC
) {
542 for (ALL_NEXTHOPS(match
->nexthop
, newhop
)) {
543 if (!CHECK_FLAG(newhop
->flags
,
548 SET_FLAG(nexthop
->flags
,
549 NEXTHOP_FLAG_RECURSIVE
);
550 nexthop_set_resolved(afi
, newhop
,
556 re
->nexthop_mtu
= match
->mtu
;
565 struct route_entry
*rib_match(afi_t afi
, safi_t safi
, vrf_id_t vrf_id
,
566 union g_addr
*addr
, struct route_node
**rn_out
)
569 struct route_table
*table
;
570 struct route_node
*rn
;
571 struct route_entry
*match
= NULL
;
572 struct nexthop
*newhop
;
575 table
= zebra_vrf_table(afi
, safi
, vrf_id
);
579 memset(&p
, 0, sizeof(struct prefix
));
582 p
.u
.prefix4
= addr
->ipv4
;
583 p
.prefixlen
= IPV4_MAX_PREFIXLEN
;
585 p
.u
.prefix6
= addr
->ipv6
;
586 p
.prefixlen
= IPV6_MAX_PREFIXLEN
;
589 rn
= route_node_match(table
, (struct prefix
*)&p
);
594 route_unlock_node(rn
);
596 dest
= rib_dest_from_rnode(rn
);
597 if (dest
&& dest
->selected_fib
&&
598 !CHECK_FLAG(dest
->selected_fib
->status
, ROUTE_ENTRY_REMOVED
))
599 match
= dest
->selected_fib
;
601 /* If there is no selected route or matched route is EGP, go up
606 } while (rn
&& rn
->info
== NULL
);
610 if (match
->type
!= ZEBRA_ROUTE_CONNECT
) {
612 for (ALL_NEXTHOPS(match
->nexthop
, newhop
))
613 if (CHECK_FLAG(newhop
->flags
,
630 struct route_entry
*rib_match_ipv4_multicast(vrf_id_t vrf_id
,
632 struct route_node
**rn_out
)
634 struct route_entry
*re
= NULL
, *mre
= NULL
, *ure
= NULL
;
635 struct route_node
*m_rn
= NULL
, *u_rn
= NULL
;
636 union g_addr gaddr
= {.ipv4
= addr
};
638 switch (ipv4_multicast_mode
) {
639 case MCAST_MRIB_ONLY
:
640 return rib_match(AFI_IP
, SAFI_MULTICAST
, vrf_id
, &gaddr
,
642 case MCAST_URIB_ONLY
:
643 return rib_match(AFI_IP
, SAFI_UNICAST
, vrf_id
, &gaddr
, rn_out
);
644 case MCAST_NO_CONFIG
:
645 case MCAST_MIX_MRIB_FIRST
:
646 re
= mre
= rib_match(AFI_IP
, SAFI_MULTICAST
, vrf_id
, &gaddr
,
649 re
= ure
= rib_match(AFI_IP
, SAFI_UNICAST
, vrf_id
,
652 case MCAST_MIX_DISTANCE
:
653 mre
= rib_match(AFI_IP
, SAFI_MULTICAST
, vrf_id
, &gaddr
, &m_rn
);
654 ure
= rib_match(AFI_IP
, SAFI_UNICAST
, vrf_id
, &gaddr
, &u_rn
);
656 re
= ure
->distance
< mre
->distance
? ure
: mre
;
662 case MCAST_MIX_PFXLEN
:
663 mre
= rib_match(AFI_IP
, SAFI_MULTICAST
, vrf_id
, &gaddr
, &m_rn
);
664 ure
= rib_match(AFI_IP
, SAFI_UNICAST
, vrf_id
, &gaddr
, &u_rn
);
666 re
= u_rn
->p
.prefixlen
> m_rn
->p
.prefixlen
? ure
: mre
;
675 *rn_out
= (re
== mre
) ? m_rn
: u_rn
;
677 if (IS_ZEBRA_DEBUG_RIB
) {
679 inet_ntop(AF_INET
, &addr
, buf
, BUFSIZ
);
681 zlog_debug("%s: %s: found %s, using %s", __func__
, buf
,
682 mre
? (ure
? "MRIB+URIB" : "MRIB")
683 : ure
? "URIB" : "nothing",
684 re
== ure
? "URIB" : re
== mre
? "MRIB" : "none");
689 void multicast_mode_ipv4_set(enum multicast_mode mode
)
691 if (IS_ZEBRA_DEBUG_RIB
)
692 zlog_debug("%s: multicast lookup mode set (%d)", __func__
,
694 ipv4_multicast_mode
= mode
;
697 enum multicast_mode
multicast_mode_ipv4_get(void)
699 return ipv4_multicast_mode
;
702 struct route_entry
*rib_lookup_ipv4(struct prefix_ipv4
*p
, vrf_id_t vrf_id
)
704 struct route_table
*table
;
705 struct route_node
*rn
;
706 struct route_entry
*match
= NULL
;
707 struct nexthop
*nexthop
;
711 table
= zebra_vrf_table(AFI_IP
, SAFI_UNICAST
, vrf_id
);
715 rn
= route_node_lookup(table
, (struct prefix
*)p
);
717 /* No route for this prefix. */
722 route_unlock_node(rn
);
723 dest
= rib_dest_from_rnode(rn
);
725 if (dest
&& dest
->selected_fib
&&
726 !CHECK_FLAG(dest
->selected_fib
->status
, ROUTE_ENTRY_REMOVED
))
727 match
= dest
->selected_fib
;
732 if (match
->type
== ZEBRA_ROUTE_CONNECT
)
735 for (ALL_NEXTHOPS(match
->nexthop
, nexthop
))
736 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
))
743 * This clone function, unlike its original rib_lookup_ipv4(), checks
744 * if specified IPv4 route record (prefix/mask -> gate) exists in
745 * the whole RIB and has ROUTE_ENTRY_SELECTED_FIB set.
749 * 0: exact match found
750 * 1: a match was found with a different gate
751 * 2: connected route found
752 * 3: no matches found
754 int rib_lookup_ipv4_route(struct prefix_ipv4
*p
, union sockunion
*qgate
,
757 struct route_table
*table
;
758 struct route_node
*rn
;
759 struct route_entry
*match
= NULL
;
760 struct nexthop
*nexthop
;
765 table
= zebra_vrf_table(AFI_IP
, SAFI_UNICAST
, vrf_id
);
767 return ZEBRA_RIB_LOOKUP_ERROR
;
769 /* Scan the RIB table for exactly matching RIB entry. */
770 rn
= route_node_lookup(table
, (struct prefix
*)p
);
772 /* No route for this prefix. */
774 return ZEBRA_RIB_NOTFOUND
;
777 route_unlock_node(rn
);
778 dest
= rib_dest_from_rnode(rn
);
780 /* Find out if a "selected" RR for the discovered RIB entry exists ever.
782 if (dest
&& dest
->selected_fib
&&
783 !CHECK_FLAG(dest
->selected_fib
->status
, ROUTE_ENTRY_REMOVED
))
784 match
= dest
->selected_fib
;
786 /* None such found :( */
788 return ZEBRA_RIB_NOTFOUND
;
790 if (match
->type
== ZEBRA_ROUTE_CONNECT
)
791 return ZEBRA_RIB_FOUND_CONNECTED
;
793 /* Ok, we have a cood candidate, let's check it's nexthop list... */
795 for (ALL_NEXTHOPS(match
->nexthop
, nexthop
))
796 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
)) {
798 if (nexthop
->gate
.ipv4
.s_addr
== sockunion2ip(qgate
))
799 return ZEBRA_RIB_FOUND_EXACT
;
800 if (IS_ZEBRA_DEBUG_RIB
) {
801 char gate_buf
[INET_ADDRSTRLEN
],
802 qgate_buf
[INET_ADDRSTRLEN
];
803 inet_ntop(AF_INET
, &nexthop
->gate
.ipv4
.s_addr
,
804 gate_buf
, INET_ADDRSTRLEN
);
805 inet_ntop(AF_INET
, &sockunion2ip(qgate
),
806 qgate_buf
, INET_ADDRSTRLEN
);
807 zlog_debug("%s: qgate == %s, %s == %s",
809 nexthop
->rparent
? "rgate" : "gate",
815 return ZEBRA_RIB_FOUND_NOGATE
;
817 return ZEBRA_RIB_NOTFOUND
;
820 #define RIB_SYSTEM_ROUTE(R) \
821 ((R)->type == ZEBRA_ROUTE_KERNEL || (R)->type == ZEBRA_ROUTE_CONNECT)
823 /* This function verifies reachability of one given nexthop, which can be
824 * numbered or unnumbered, IPv4 or IPv6. The result is unconditionally stored
825 * in nexthop->flags field. If the 4th parameter, 'set', is non-zero,
826 * nexthop->ifindex will be updated appropriately as well.
827 * An existing route map can turn (otherwise active) nexthop into inactive, but
830 * The return value is the final value of 'ACTIVE' flag.
833 static unsigned nexthop_active_check(struct route_node
*rn
,
834 struct route_entry
*re
,
835 struct nexthop
*nexthop
, int set
)
837 struct interface
*ifp
;
838 route_map_result_t ret
= RMAP_MATCH
;
840 char buf
[SRCDEST2STR_BUFFER
];
841 struct prefix
*p
, *src_p
;
842 srcdest_rnode_prefixes(rn
, &p
, &src_p
);
844 if (rn
->p
.family
== AF_INET
)
846 else if (rn
->p
.family
== AF_INET6
)
850 switch (nexthop
->type
) {
851 case NEXTHOP_TYPE_IFINDEX
:
852 ifp
= if_lookup_by_index(nexthop
->ifindex
, nexthop
->vrf_id
);
853 if (ifp
&& if_is_operative(ifp
))
854 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
856 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
858 case NEXTHOP_TYPE_IPV4
:
859 case NEXTHOP_TYPE_IPV4_IFINDEX
:
861 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_EVPN_RVTEP
))
862 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
863 else if (nexthop_active(AFI_IP
, re
, nexthop
, set
, rn
))
864 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
866 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
868 case NEXTHOP_TYPE_IPV6
:
870 if (nexthop_active(AFI_IP6
, re
, nexthop
, set
, rn
))
871 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
873 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
875 case NEXTHOP_TYPE_IPV6_IFINDEX
:
876 /* RFC 5549, v4 prefix with v6 NH */
877 if (rn
->p
.family
!= AF_INET
)
879 if (IN6_IS_ADDR_LINKLOCAL(&nexthop
->gate
.ipv6
)) {
880 ifp
= if_lookup_by_index(nexthop
->ifindex
,
882 if (ifp
&& if_is_operative(ifp
))
883 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
885 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
887 if (nexthop_active(AFI_IP6
, re
, nexthop
, set
, rn
))
888 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
890 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
893 case NEXTHOP_TYPE_BLACKHOLE
:
894 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
899 if (!CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
))
902 /* XXX: What exactly do those checks do? Do we support
903 * e.g. IPv4 routes with IPv6 nexthops or vice versa? */
904 if (RIB_SYSTEM_ROUTE(re
) || (family
== AFI_IP
&& p
->family
!= AF_INET
)
905 || (family
== AFI_IP6
&& p
->family
!= AF_INET6
))
906 return CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
908 /* The original code didn't determine the family correctly
909 * e.g. for NEXTHOP_TYPE_IFINDEX. Retrieve the correct afi
910 * from the rib_table_info in those cases.
911 * Possibly it may be better to use only the rib_table_info
915 rib_table_info_t
*info
;
917 info
= srcdest_rnode_table_info(rn
);
921 memset(&nexthop
->rmap_src
.ipv6
, 0, sizeof(union g_addr
));
923 /* It'll get set if required inside */
924 ret
= zebra_route_map_check(family
, re
->type
, p
, nexthop
,
925 nexthop
->vrf_id
, re
->tag
);
926 if (ret
== RMAP_DENYMATCH
) {
927 if (IS_ZEBRA_DEBUG_RIB
) {
928 srcdest_rnode2str(rn
, buf
, sizeof(buf
));
930 "%u:%s: Filtering out with NH out %s due to route map",
932 ifindex2ifname(nexthop
->ifindex
,
935 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
937 return CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
940 /* Iterate over all nexthops of the given RIB entry and refresh their
941 * ACTIVE flag. re->nexthop_active_num is updated accordingly. If any
942 * nexthop is found to toggle the ACTIVE flag, the whole re structure
943 * is flagged with ROUTE_ENTRY_CHANGED. The 4th 'set' argument is
944 * transparently passed to nexthop_active_check().
946 * Return value is the new number of active nexthops.
949 static int nexthop_active_update(struct route_node
*rn
, struct route_entry
*re
,
952 struct nexthop
*nexthop
;
953 union g_addr prev_src
;
954 unsigned int prev_active
, new_active
, old_num_nh
;
955 ifindex_t prev_index
;
956 old_num_nh
= re
->nexthop_active_num
;
958 re
->nexthop_active_num
= 0;
959 UNSET_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
);
961 for (nexthop
= re
->nexthop
; nexthop
; nexthop
= nexthop
->next
) {
962 /* No protocol daemon provides src and so we're skipping
964 prev_src
= nexthop
->rmap_src
;
965 prev_active
= CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
966 prev_index
= nexthop
->ifindex
;
967 if ((new_active
= nexthop_active_check(rn
, re
, nexthop
, set
)))
968 re
->nexthop_active_num
++;
969 /* Don't allow src setting on IPv6 addr for now */
970 if (prev_active
!= new_active
|| prev_index
!= nexthop
->ifindex
971 || ((nexthop
->type
>= NEXTHOP_TYPE_IFINDEX
972 && nexthop
->type
< NEXTHOP_TYPE_IPV6
)
973 && prev_src
.ipv4
.s_addr
974 != nexthop
->rmap_src
.ipv4
.s_addr
)
975 || ((nexthop
->type
>= NEXTHOP_TYPE_IPV6
976 && nexthop
->type
< NEXTHOP_TYPE_BLACKHOLE
)
977 && !(IPV6_ADDR_SAME(&prev_src
.ipv6
,
978 &nexthop
->rmap_src
.ipv6
)))) {
979 SET_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
);
980 SET_FLAG(re
->status
, ROUTE_ENTRY_NEXTHOPS_CHANGED
);
984 if (old_num_nh
!= re
->nexthop_active_num
)
985 SET_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
);
987 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
)) {
988 SET_FLAG(re
->status
, ROUTE_ENTRY_NEXTHOPS_CHANGED
);
991 return re
->nexthop_active_num
;
995 * Is this RIB labeled-unicast? It must be of type BGP and all paths
996 * (nexthops) must have a label.
998 int zebra_rib_labeled_unicast(struct route_entry
*re
)
1000 struct nexthop
*nexthop
= NULL
;
1002 if (re
->type
!= ZEBRA_ROUTE_BGP
)
1005 for (ALL_NEXTHOPS(re
->nexthop
, nexthop
))
1006 if (!nexthop
->nh_label
|| !nexthop
->nh_label
->num_labels
)
1012 void kernel_route_rib_pass_fail(struct route_node
*rn
, struct prefix
*p
,
1013 struct route_entry
*re
,
1014 enum southbound_results res
)
1016 struct nexthop
*nexthop
;
1017 char buf
[PREFIX_STRLEN
];
1020 dest
= rib_dest_from_rnode(rn
);
1023 case SOUTHBOUND_INSTALL_SUCCESS
:
1024 dest
->selected_fib
= re
;
1025 for (ALL_NEXTHOPS(re
->nexthop
, nexthop
)) {
1026 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_RECURSIVE
))
1029 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
))
1030 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
1032 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
1034 zsend_route_notify_owner(re
, p
, ZAPI_ROUTE_INSTALLED
);
1036 case SOUTHBOUND_INSTALL_FAILURE
:
1038 * I am not sure this is the right thing to do here
1039 * but the code always set selected_fib before
1040 * this assignment was moved here.
1042 dest
->selected_fib
= re
;
1044 zsend_route_notify_owner(re
, p
, ZAPI_ROUTE_FAIL_INSTALL
);
1045 zlog_warn("%u:%s: Route install failed", re
->vrf_id
,
1046 prefix2str(p
, buf
, sizeof(buf
)));
1048 case SOUTHBOUND_DELETE_SUCCESS
:
1050 * The case where selected_fib is not re is
1051 * when we have received a system route
1052 * that is overriding our installed route
1053 * as such we should leave the selected_fib
1056 if (dest
->selected_fib
== re
)
1057 dest
->selected_fib
= NULL
;
1058 for (ALL_NEXTHOPS(re
->nexthop
, nexthop
))
1059 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
1061 case SOUTHBOUND_DELETE_FAILURE
:
1063 * Should we set this to NULL if the
1066 dest
->selected_fib
= NULL
;
1067 zlog_warn("%u:%s: Route Deletion failure", re
->vrf_id
,
1068 prefix2str(p
, buf
, sizeof(buf
)));
1073 /* Update flag indicates whether this is a "replace" or not. Currently, this
1074 * is only used for IPv4.
1076 void rib_install_kernel(struct route_node
*rn
, struct route_entry
*re
,
1077 struct route_entry
*old
)
1079 struct nexthop
*nexthop
;
1080 rib_table_info_t
*info
= srcdest_rnode_table_info(rn
);
1081 struct prefix
*p
, *src_p
;
1082 struct zebra_vrf
*zvrf
= vrf_info_lookup(re
->vrf_id
);
1084 srcdest_rnode_prefixes(rn
, &p
, &src_p
);
1086 if (info
->safi
!= SAFI_UNICAST
) {
1087 for (ALL_NEXTHOPS(re
->nexthop
, nexthop
))
1088 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
1091 struct nexthop
*prev
;
1093 for (ALL_NEXTHOPS(re
->nexthop
, nexthop
)) {
1094 UNSET_FLAG (nexthop
->flags
, NEXTHOP_FLAG_DUPLICATE
);
1095 for (ALL_NEXTHOPS(re
->nexthop
, prev
)) {
1096 if (prev
== nexthop
)
1098 if (nexthop_same_firsthop (nexthop
, prev
))
1100 SET_FLAG (nexthop
->flags
, NEXTHOP_FLAG_DUPLICATE
);
1108 * If this is a replace to a new RE let the originator of the RE
1109 * know that they've lost
1111 if (old
&& (old
!= re
) && (old
->type
!= re
->type
))
1112 zsend_route_notify_owner(old
, p
, ZAPI_ROUTE_BETTER_ADMIN_WON
);
1115 * Make sure we update the FPM any time we send new information to
1118 hook_call(rib_update
, rn
, "installing in kernel");
1119 kernel_route_rib(rn
, p
, src_p
, old
, re
);
1125 /* Uninstall the route from kernel. */
1126 void rib_uninstall_kernel(struct route_node
*rn
, struct route_entry
*re
)
1128 struct nexthop
*nexthop
;
1129 rib_table_info_t
*info
= srcdest_rnode_table_info(rn
);
1130 struct prefix
*p
, *src_p
;
1131 struct zebra_vrf
*zvrf
= vrf_info_lookup(re
->vrf_id
);
1133 srcdest_rnode_prefixes(rn
, &p
, &src_p
);
1135 if (info
->safi
!= SAFI_UNICAST
) {
1136 for (ALL_NEXTHOPS(re
->nexthop
, nexthop
))
1137 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
1142 * Make sure we update the FPM any time we send new information to
1145 hook_call(rib_update
, rn
, "uninstalling from kernel");
1146 kernel_route_rib(rn
, p
, src_p
, re
, NULL
);
1153 /* Uninstall the route from kernel. */
1154 static void rib_uninstall(struct route_node
*rn
, struct route_entry
*re
)
1156 rib_table_info_t
*info
= srcdest_rnode_table_info(rn
);
1157 rib_dest_t
*dest
= rib_dest_from_rnode(rn
);
1159 if (dest
&& dest
->selected_fib
== re
) {
1160 if (info
->safi
== SAFI_UNICAST
)
1161 hook_call(rib_update
, rn
, "rib_uninstall");
1163 if (!RIB_SYSTEM_ROUTE(re
))
1164 rib_uninstall_kernel(rn
, re
);
1166 /* If labeled-unicast route, uninstall transit LSP. */
1167 if (zebra_rib_labeled_unicast(re
))
1168 zebra_mpls_lsp_uninstall(info
->zvrf
, rn
, re
);
1171 if (CHECK_FLAG(re
->flags
, ZEBRA_FLAG_SELECTED
)) {
1172 struct prefix
*p
, *src_p
;
1173 srcdest_rnode_prefixes(rn
, &p
, &src_p
);
1175 redistribute_delete(p
, src_p
, re
);
1176 UNSET_FLAG(re
->flags
, ZEBRA_FLAG_SELECTED
);
1181 * rib_can_delete_dest
1183 * Returns TRUE if the given dest can be deleted from the table.
1185 static int rib_can_delete_dest(rib_dest_t
*dest
)
1192 * Don't delete the dest if we have to update the FPM about this
1195 if (CHECK_FLAG(dest
->flags
, RIB_DEST_UPDATE_FPM
)
1196 || CHECK_FLAG(dest
->flags
, RIB_DEST_SENT_TO_FPM
))
1205 * Garbage collect the rib dest corresponding to the given route node
1208 * Returns TRUE if the dest was deleted, FALSE otherwise.
1210 int rib_gc_dest(struct route_node
*rn
)
1214 dest
= rib_dest_from_rnode(rn
);
1218 if (!rib_can_delete_dest(dest
))
1221 if (IS_ZEBRA_DEBUG_RIB
) {
1222 struct zebra_vrf
*zvrf
;
1224 zvrf
= rib_dest_vrf(dest
);
1225 rnode_debug(rn
, zvrf_id(zvrf
), "removing dest from table");
1229 XFREE(MTYPE_RIB_DEST
, dest
);
1233 * Release the one reference that we keep on the route node.
1235 route_unlock_node(rn
);
1239 static void rib_process_add_fib(struct zebra_vrf
*zvrf
, struct route_node
*rn
,
1240 struct route_entry
*new)
1242 rib_dest_t
*dest
= rib_dest_from_rnode(rn
);
1244 hook_call(rib_update
, rn
, "new route selected");
1246 /* Update real nexthop. This may actually determine if nexthop is active
1248 if (!nexthop_active_update(rn
, new, 1)) {
1249 UNSET_FLAG(new->status
, ROUTE_ENTRY_CHANGED
);
1253 if (IS_ZEBRA_DEBUG_RIB
) {
1254 char buf
[SRCDEST2STR_BUFFER
];
1255 srcdest_rnode2str(rn
, buf
, sizeof(buf
));
1256 zlog_debug("%u:%s: Adding route rn %p, re %p (type %d)",
1257 zvrf_id(zvrf
), buf
, rn
, new, new->type
);
1260 /* If labeled-unicast route, install transit LSP. */
1261 if (zebra_rib_labeled_unicast(new))
1262 zebra_mpls_lsp_install(zvrf
, rn
, new);
1264 if (!RIB_SYSTEM_ROUTE(new))
1265 rib_install_kernel(rn
, new, NULL
);
1267 dest
->selected_fib
= new;
1269 UNSET_FLAG(new->status
, ROUTE_ENTRY_CHANGED
);
1272 static void rib_process_del_fib(struct zebra_vrf
*zvrf
, struct route_node
*rn
,
1273 struct route_entry
*old
)
1275 rib_dest_t
*dest
= rib_dest_from_rnode(rn
);
1276 hook_call(rib_update
, rn
, "removing existing route");
1278 /* Uninstall from kernel. */
1279 if (IS_ZEBRA_DEBUG_RIB
) {
1280 char buf
[SRCDEST2STR_BUFFER
];
1281 srcdest_rnode2str(rn
, buf
, sizeof(buf
));
1282 zlog_debug("%u:%s: Deleting route rn %p, re %p (type %d)",
1283 zvrf_id(zvrf
), buf
, rn
, old
, old
->type
);
1286 /* If labeled-unicast route, uninstall transit LSP. */
1287 if (zebra_rib_labeled_unicast(old
))
1288 zebra_mpls_lsp_uninstall(zvrf
, rn
, old
);
1290 if (!RIB_SYSTEM_ROUTE(old
))
1291 rib_uninstall_kernel(rn
, old
);
1294 * We are setting this to NULL here
1295 * because that is what we traditionally
1296 * have been doing. I am not positive
1297 * that this is the right thing to do
1298 * but let's leave the code alone
1299 * for the RIB_SYSTEM_ROUTE case
1301 dest
->selected_fib
= NULL
;
1304 /* Update nexthop for route, reset changed flag. */
1305 nexthop_active_update(rn
, old
, 1);
1306 UNSET_FLAG(old
->status
, ROUTE_ENTRY_CHANGED
);
1309 static void rib_process_update_fib(struct zebra_vrf
*zvrf
,
1310 struct route_node
*rn
,
1311 struct route_entry
*old
,
1312 struct route_entry
*new)
1314 struct nexthop
*nexthop
= NULL
;
1316 rib_dest_t
*dest
= rib_dest_from_rnode(rn
);
1319 * We have to install or update if a new route has been selected or
1320 * something has changed.
1322 if (new != old
|| CHECK_FLAG(new->status
, ROUTE_ENTRY_CHANGED
)) {
1323 hook_call(rib_update
, rn
, "updating existing route");
1325 /* Update the nexthop; we could determine here that nexthop is
1327 if (nexthop_active_update(rn
, new, 1))
1330 /* If nexthop is active, install the selected route, if
1332 * the install succeeds, cleanup flags for prior route, if
1337 if (IS_ZEBRA_DEBUG_RIB
) {
1338 char buf
[SRCDEST2STR_BUFFER
];
1339 srcdest_rnode2str(rn
, buf
, sizeof(buf
));
1342 "%u:%s: Updating route rn %p, re %p (type %d) "
1344 zvrf_id(zvrf
), buf
, rn
, new,
1345 new->type
, old
, old
->type
);
1348 "%u:%s: Updating route rn %p, re %p (type %d)",
1349 zvrf_id(zvrf
), buf
, rn
, new,
1353 /* If labeled-unicast route, uninstall transit LSP. */
1354 if (zebra_rib_labeled_unicast(old
))
1355 zebra_mpls_lsp_uninstall(zvrf
, rn
, old
);
1357 /* Non-system route should be installed. */
1358 if (!RIB_SYSTEM_ROUTE(new)) {
1359 /* If labeled-unicast route, install transit
1361 if (zebra_rib_labeled_unicast(new))
1362 zebra_mpls_lsp_install(zvrf
, rn
, new);
1364 rib_install_kernel(rn
, new, old
);
1367 * We do not need to install the
1368 * selected route because it
1369 * is already isntalled by
1370 * the system( ie not us )
1371 * so just mark it as winning
1372 * we do need to ensure that
1373 * if we uninstall a route
1374 * from ourselves we don't
1375 * over write this pointer
1377 dest
->selected_fib
= NULL
;
1379 /* If install succeeded or system route, cleanup flags
1380 * for prior route. */
1382 if (RIB_SYSTEM_ROUTE(new)) {
1383 if (!RIB_SYSTEM_ROUTE(old
))
1384 rib_uninstall_kernel(rn
, old
);
1386 for (nexthop
= old
->nexthop
; nexthop
;
1387 nexthop
= nexthop
->next
)
1388 UNSET_FLAG(nexthop
->flags
,
1395 * If nexthop for selected route is not active or install
1397 * may need to uninstall and delete for redistribution.
1400 if (IS_ZEBRA_DEBUG_RIB
) {
1401 char buf
[SRCDEST2STR_BUFFER
];
1402 srcdest_rnode2str(rn
, buf
, sizeof(buf
));
1405 "%u:%s: Deleting route rn %p, re %p (type %d) "
1406 "old %p (type %d) - %s",
1407 zvrf_id(zvrf
), buf
, rn
, new,
1408 new->type
, old
, old
->type
,
1409 nh_active
? "install failed"
1410 : "nexthop inactive");
1413 "%u:%s: Deleting route rn %p, re %p (type %d) - %s",
1414 zvrf_id(zvrf
), buf
, rn
, new,
1416 nh_active
? "install failed"
1417 : "nexthop inactive");
1420 /* If labeled-unicast route, uninstall transit LSP. */
1421 if (zebra_rib_labeled_unicast(old
))
1422 zebra_mpls_lsp_uninstall(zvrf
, rn
, old
);
1424 if (!RIB_SYSTEM_ROUTE(old
))
1425 rib_uninstall_kernel(rn
, old
);
1427 dest
->selected_fib
= NULL
;
1431 * Same route selected; check if in the FIB and if not,
1433 * is housekeeping code to deal with race conditions in kernel
1435 * netlink reporting interface up before IPv4 or IPv6 protocol
1439 if (!RIB_SYSTEM_ROUTE(new)) {
1440 bool in_fib
= false;
1442 for (ALL_NEXTHOPS(new->nexthop
, nexthop
))
1443 if (CHECK_FLAG(nexthop
->flags
,
1444 NEXTHOP_FLAG_FIB
)) {
1449 rib_install_kernel(rn
, new, NULL
);
1453 /* Update prior route. */
1455 /* Set real nexthop. */
1456 nexthop_active_update(rn
, old
, 1);
1457 UNSET_FLAG(old
->status
, ROUTE_ENTRY_CHANGED
);
1460 /* Clear changed flag. */
1461 UNSET_FLAG(new->status
, ROUTE_ENTRY_CHANGED
);
1464 /* Check if 'alternate' RIB entry is better than 'current'. */
1465 static struct route_entry
*rib_choose_best(struct route_entry
*current
,
1466 struct route_entry
*alternate
)
1468 if (current
== NULL
)
1471 /* filter route selection in following order:
1472 * - connected beats other types
1473 * - lower distance beats higher
1474 * - lower metric beats higher for equal distance
1475 * - last, hence oldest, route wins tie break.
1478 /* Connected routes. Pick the last connected
1479 * route of the set of lowest metric connected routes.
1481 if (alternate
->type
== ZEBRA_ROUTE_CONNECT
) {
1482 if (current
->type
!= ZEBRA_ROUTE_CONNECT
1483 || alternate
->metric
<= current
->metric
)
1489 if (current
->type
== ZEBRA_ROUTE_CONNECT
)
1492 /* higher distance loses */
1493 if (alternate
->distance
< current
->distance
)
1495 if (current
->distance
< alternate
->distance
)
1498 /* metric tie-breaks equal distance */
1499 if (alternate
->metric
<= current
->metric
)
1505 /* Core function for processing routing information base. */
1506 static void rib_process(struct route_node
*rn
)
1508 struct route_entry
*re
;
1509 struct route_entry
*next
;
1510 struct route_entry
*old_selected
= NULL
;
1511 struct route_entry
*new_selected
= NULL
;
1512 struct route_entry
*old_fib
= NULL
;
1513 struct route_entry
*new_fib
= NULL
;
1514 struct route_entry
*best
= NULL
;
1515 char buf
[SRCDEST2STR_BUFFER
];
1517 struct zebra_vrf
*zvrf
= NULL
;
1518 struct prefix
*p
, *src_p
;
1519 srcdest_rnode_prefixes(rn
, &p
, &src_p
);
1520 vrf_id_t vrf_id
= VRF_UNKNOWN
;
1524 dest
= rib_dest_from_rnode(rn
);
1526 zvrf
= rib_dest_vrf(dest
);
1527 vrf_id
= zvrf_id(zvrf
);
1530 if (IS_ZEBRA_DEBUG_RIB
)
1531 srcdest_rnode2str(rn
, buf
, sizeof(buf
));
1533 if (IS_ZEBRA_DEBUG_RIB_DETAILED
)
1534 zlog_debug("%u:%s: Processing rn %p", vrf_id
, buf
, rn
);
1537 * we can have rn's that have a NULL info pointer
1538 * (dest). As such let's not let the deref happen
1539 * additionally we know RNODE_FOREACH_RE_SAFE
1540 * will not iterate so we are ok.
1543 old_fib
= dest
->selected_fib
;
1545 RNODE_FOREACH_RE_SAFE (rn
, re
, next
) {
1546 if (IS_ZEBRA_DEBUG_RIB_DETAILED
)
1548 "%u:%s: Examine re %p (type %d) status %x flags %x "
1549 "dist %d metric %d",
1550 vrf_id
, buf
, re
, re
->type
, re
->status
,
1551 re
->flags
, re
->distance
, re
->metric
);
1553 UNSET_FLAG(re
->status
, ROUTE_ENTRY_NEXTHOPS_CHANGED
);
1555 /* Currently selected re. */
1556 if (CHECK_FLAG(re
->flags
, ZEBRA_FLAG_SELECTED
)) {
1557 assert(old_selected
== NULL
);
1561 /* Skip deleted entries from selection */
1562 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
))
1565 /* Skip unreachable nexthop. */
1566 /* This first call to nexthop_active_update is merely to
1568 * there's any change to nexthops associated with this RIB
1570 * rib_process() can be invoked due to an external event such as
1572 * down or due to next-hop-tracking evaluation. In the latter
1574 * a decision has already been made that the NHs have changed.
1576 * need to invoke a potentially expensive call again. Further,
1578 * the change might be in a recursive NH which is not caught in
1579 * the nexthop_active_update() code. Thus, we might miss changes
1583 if (!CHECK_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
)
1584 && !nexthop_active_update(rn
, re
, 0)) {
1585 if (re
->type
== ZEBRA_ROUTE_TABLE
) {
1586 /* XXX: HERE BE DRAGONS!!!!!
1587 * In all honesty, I have not yet figured out
1589 * does or why the ROUTE_ENTRY_CHANGED test
1591 * or why we need to delete a route here, and
1593 * this concerns both selected and fib route, or
1596 /* This entry was denied by the 'ip protocol
1597 * table' route-map, we
1598 * need to delete it */
1599 if (re
!= old_selected
) {
1600 if (IS_ZEBRA_DEBUG_RIB
)
1602 "%s: %s: imported via import-table but denied "
1603 "by the ip protocol table route-map",
1607 SET_FLAG(re
->status
,
1608 ROUTE_ENTRY_REMOVED
);
1614 /* Infinite distance. */
1615 if (re
->distance
== DISTANCE_INFINITY
) {
1616 UNSET_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
);
1620 if (CHECK_FLAG(re
->flags
, ZEBRA_FLAG_FIB_OVERRIDE
)) {
1621 best
= rib_choose_best(new_fib
, re
);
1622 if (new_fib
&& best
!= new_fib
)
1623 UNSET_FLAG(new_fib
->status
,
1624 ROUTE_ENTRY_CHANGED
);
1627 best
= rib_choose_best(new_selected
, re
);
1628 if (new_selected
&& best
!= new_selected
)
1629 UNSET_FLAG(new_selected
->status
,
1630 ROUTE_ENTRY_CHANGED
);
1631 new_selected
= best
;
1634 UNSET_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
);
1635 } /* RNODE_FOREACH_RE */
1637 /* If no FIB override route, use the selected route also for FIB */
1638 if (new_fib
== NULL
)
1639 new_fib
= new_selected
;
1641 /* After the cycle is finished, the following pointers will be set:
1642 * old_selected --- RE entry currently having SELECTED
1643 * new_selected --- RE entry that is newly SELECTED
1644 * old_fib --- RE entry currently in kernel FIB
1645 * new_fib --- RE entry that is newly to be in kernel FIB
1647 * new_selected will get SELECTED flag, and is going to be redistributed
1648 * the zclients. new_fib (which can be new_selected) will be installed
1652 if (IS_ZEBRA_DEBUG_RIB_DETAILED
) {
1654 "%u:%s: After processing: old_selected %p new_selected %p old_fib %p new_fib %p",
1655 vrf_id
, buf
, (void *)old_selected
, (void *)new_selected
,
1656 (void *)old_fib
, (void *)new_fib
);
1659 /* Buffer ROUTE_ENTRY_CHANGED here, because it will get cleared if
1660 * fib == selected */
1661 bool selected_changed
= new_selected
&& CHECK_FLAG(new_selected
->status
,
1662 ROUTE_ENTRY_CHANGED
);
1664 /* Update fib according to selection results */
1665 if (new_fib
&& old_fib
)
1666 rib_process_update_fib(zvrf
, rn
, old_fib
, new_fib
);
1668 rib_process_add_fib(zvrf
, rn
, new_fib
);
1670 rib_process_del_fib(zvrf
, rn
, old_fib
);
1672 /* Redistribute SELECTED entry */
1673 if (old_selected
!= new_selected
|| selected_changed
) {
1674 struct nexthop
*nexthop
;
1676 /* Check if we have a FIB route for the destination, otherwise,
1677 * don't redistribute it */
1678 for (ALL_NEXTHOPS(new_fib
? new_fib
->nexthop
: NULL
, nexthop
)) {
1679 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
)) {
1684 new_selected
= NULL
;
1686 if (new_selected
&& new_selected
!= new_fib
) {
1687 nexthop_active_update(rn
, new_selected
, 1);
1688 UNSET_FLAG(new_selected
->status
, ROUTE_ENTRY_CHANGED
);
1693 redistribute_delete(p
, src_p
, old_selected
);
1694 if (old_selected
!= new_selected
)
1695 UNSET_FLAG(old_selected
->flags
,
1696 ZEBRA_FLAG_SELECTED
);
1700 /* Install new or replace existing redistributed entry
1702 SET_FLAG(new_selected
->flags
, ZEBRA_FLAG_SELECTED
);
1703 redistribute_update(p
, src_p
, new_selected
,
1708 /* Remove all RE entries queued for removal */
1709 RNODE_FOREACH_RE_SAFE (rn
, re
, next
) {
1710 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
)) {
1711 if (IS_ZEBRA_DEBUG_RIB
) {
1712 rnode_debug(rn
, vrf_id
, "rn %p, removing re %p",
1713 (void *)rn
, (void *)re
);
1720 * Check if the dest can be deleted now.
1725 /* Take a list of route_node structs and return 1, if there was a record
1726 * picked from it and processed by rib_process(). Don't process more,
1727 * than one RN record; operate only in the specified sub-queue.
1729 static unsigned int process_subq(struct list
*subq
, u_char qindex
)
1731 struct listnode
*lnode
= listhead(subq
);
1732 struct route_node
*rnode
;
1734 struct zebra_vrf
*zvrf
= NULL
;
1739 rnode
= listgetdata(lnode
);
1740 dest
= rib_dest_from_rnode(rnode
);
1742 zvrf
= rib_dest_vrf(dest
);
1746 if (IS_ZEBRA_DEBUG_RIB_DETAILED
) {
1747 char buf
[SRCDEST2STR_BUFFER
];
1748 srcdest_rnode2str(rnode
, buf
, sizeof(buf
));
1749 zlog_debug("%u:%s: rn %p dequeued from sub-queue %u",
1750 zvrf
? zvrf_id(zvrf
) : 0, buf
, rnode
, qindex
);
1754 UNSET_FLAG(rib_dest_from_rnode(rnode
)->flags
,
1755 RIB_ROUTE_QUEUED(qindex
));
1760 zlog_debug ("%s: called for route_node (%p, %d) with no ribs",
1761 __func__
, rnode
, rnode
->lock
);
1762 zlog_backtrace(LOG_DEBUG
);
1765 route_unlock_node(rnode
);
1766 list_delete_node(subq
, lnode
);
1771 * All meta queues have been processed. Trigger next-hop evaluation.
1773 static void meta_queue_process_complete(struct work_queue
*dummy
)
1776 struct zebra_vrf
*zvrf
;
1778 /* Evaluate nexthops for those VRFs which underwent route processing.
1780 * should limit the evaluation to the necessary VRFs in most common
1783 RB_FOREACH (vrf
, vrf_id_head
, &vrfs_by_id
) {
1785 if (zvrf
== NULL
|| !(zvrf
->flags
& ZEBRA_VRF_RIB_SCHEDULED
))
1788 zvrf
->flags
&= ~ZEBRA_VRF_RIB_SCHEDULED
;
1789 zebra_evaluate_rnh(zvrf_id(zvrf
), AF_INET
, 0, RNH_NEXTHOP_TYPE
,
1791 zebra_evaluate_rnh(zvrf_id(zvrf
), AF_INET
, 0,
1792 RNH_IMPORT_CHECK_TYPE
, NULL
);
1793 zebra_evaluate_rnh(zvrf_id(zvrf
), AF_INET6
, 0, RNH_NEXTHOP_TYPE
,
1795 zebra_evaluate_rnh(zvrf_id(zvrf
), AF_INET6
, 0,
1796 RNH_IMPORT_CHECK_TYPE
, NULL
);
1799 /* Schedule LSPs for processing, if needed. */
1800 zvrf
= vrf_info_lookup(VRF_DEFAULT
);
1801 if (mpls_should_lsps_be_processed(zvrf
)) {
1802 if (IS_ZEBRA_DEBUG_MPLS
)
1804 "%u: Scheduling all LSPs upon RIB completion",
1806 zebra_mpls_lsp_schedule(zvrf
);
1807 mpls_unmark_lsps_for_processing(zvrf
);
1811 /* Dispatch the meta queue by picking, processing and unlocking the next RN from
1812 * a non-empty sub-queue with lowest priority. wq is equal to zebra->ribq and
1814 * is pointed to the meta queue structure.
1816 static wq_item_status
meta_queue_process(struct work_queue
*dummy
, void *data
)
1818 struct meta_queue
*mq
= data
;
1821 for (i
= 0; i
< MQ_SIZE
; i
++)
1822 if (process_subq(mq
->subq
[i
], i
)) {
1826 return mq
->size
? WQ_REQUEUE
: WQ_SUCCESS
;
1830 * Map from rib types to queue type (priority) in meta queue
1832 static const u_char meta_queue_map
[ZEBRA_ROUTE_MAX
] = {
1833 [ZEBRA_ROUTE_SYSTEM
] = 4,
1834 [ZEBRA_ROUTE_KERNEL
] = 0,
1835 [ZEBRA_ROUTE_CONNECT
] = 0,
1836 [ZEBRA_ROUTE_STATIC
] = 1,
1837 [ZEBRA_ROUTE_RIP
] = 2,
1838 [ZEBRA_ROUTE_RIPNG
] = 2,
1839 [ZEBRA_ROUTE_OSPF
] = 2,
1840 [ZEBRA_ROUTE_OSPF6
] = 2,
1841 [ZEBRA_ROUTE_ISIS
] = 2,
1842 [ZEBRA_ROUTE_BGP
] = 3,
1843 [ZEBRA_ROUTE_PIM
] = 4, // Shouldn't happen but for safety
1844 [ZEBRA_ROUTE_EIGRP
] = 2,
1845 [ZEBRA_ROUTE_NHRP
] = 2,
1846 [ZEBRA_ROUTE_HSLS
] = 4,
1847 [ZEBRA_ROUTE_OLSR
] = 4,
1848 [ZEBRA_ROUTE_TABLE
] = 1,
1849 [ZEBRA_ROUTE_LDP
] = 4,
1850 [ZEBRA_ROUTE_VNC
] = 3,
1851 [ZEBRA_ROUTE_VNC_DIRECT
] = 3,
1852 [ZEBRA_ROUTE_VNC_DIRECT_RH
] = 3,
1853 [ZEBRA_ROUTE_BGP_DIRECT
] = 3,
1854 [ZEBRA_ROUTE_BGP_DIRECT_EXT
] = 3,
1855 [ZEBRA_ROUTE_BABEL
] = 2,
1856 [ZEBRA_ROUTE_ALL
] = 4, // Shouldn't happen but for safety
1859 /* Look into the RN and queue it into one or more priority queues,
1860 * increasing the size for each data push done.
1862 static void rib_meta_queue_add(struct meta_queue
*mq
, struct route_node
*rn
)
1864 struct route_entry
*re
;
1866 RNODE_FOREACH_RE (rn
, re
) {
1867 u_char qindex
= meta_queue_map
[re
->type
];
1868 struct zebra_vrf
*zvrf
;
1870 /* Invariant: at this point we always have rn->info set. */
1871 if (CHECK_FLAG(rib_dest_from_rnode(rn
)->flags
,
1872 RIB_ROUTE_QUEUED(qindex
))) {
1873 if (IS_ZEBRA_DEBUG_RIB_DETAILED
)
1876 "rn %p is already queued in sub-queue %u",
1877 (void *)rn
, qindex
);
1881 SET_FLAG(rib_dest_from_rnode(rn
)->flags
,
1882 RIB_ROUTE_QUEUED(qindex
));
1883 listnode_add(mq
->subq
[qindex
], rn
);
1884 route_lock_node(rn
);
1887 if (IS_ZEBRA_DEBUG_RIB_DETAILED
)
1888 rnode_debug(rn
, re
->vrf_id
,
1889 "queued rn %p into sub-queue %u",
1890 (void *)rn
, qindex
);
1892 zvrf
= zebra_vrf_lookup_by_id(re
->vrf_id
);
1894 zvrf
->flags
|= ZEBRA_VRF_RIB_SCHEDULED
;
1898 /* Add route_node to work queue and schedule processing */
1899 void rib_queue_add(struct route_node
*rn
)
1903 /* Pointless to queue a route_node with no RIB entries to add or remove
1905 if (!rnode_to_ribs(rn
)) {
1906 zlog_debug("%s: called for route_node (%p, %d) with no ribs",
1907 __func__
, (void *)rn
, rn
->lock
);
1908 zlog_backtrace(LOG_DEBUG
);
1912 if (zebrad
.ribq
== NULL
) {
1913 zlog_err("%s: work_queue does not exist!", __func__
);
1918 * The RIB queue should normally be either empty or holding the only
1919 * work_queue_item element. In the latter case this element would
1920 * hold a pointer to the meta queue structure, which must be used to
1921 * actually queue the route nodes to process. So create the MQ
1922 * holder, if necessary, then push the work into it in any case.
1923 * This semantics was introduced after 0.99.9 release.
1925 if (work_queue_empty(zebrad
.ribq
))
1926 work_queue_add(zebrad
.ribq
, zebrad
.mq
);
1928 rib_meta_queue_add(zebrad
.mq
, rn
);
1933 /* Create new meta queue.
1934 A destructor function doesn't seem to be necessary here.
1936 static struct meta_queue
*meta_queue_new(void)
1938 struct meta_queue
*new;
1941 new = XCALLOC(MTYPE_WORK_QUEUE
, sizeof(struct meta_queue
));
1944 for (i
= 0; i
< MQ_SIZE
; i
++) {
1945 new->subq
[i
] = list_new();
1946 assert(new->subq
[i
]);
1952 void meta_queue_free(struct meta_queue
*mq
)
1956 for (i
= 0; i
< MQ_SIZE
; i
++)
1957 list_delete_and_null(&mq
->subq
[i
]);
1959 XFREE(MTYPE_WORK_QUEUE
, mq
);
1962 /* initialise zebra rib work queue */
1963 static void rib_queue_init(struct zebra_t
*zebra
)
1968 work_queue_new(zebra
->master
, "route_node processing"))) {
1969 zlog_err("%s: could not initialise work queue!", __func__
);
1973 /* fill in the work queue spec */
1974 zebra
->ribq
->spec
.workfunc
= &meta_queue_process
;
1975 zebra
->ribq
->spec
.errorfunc
= NULL
;
1976 zebra
->ribq
->spec
.completion_func
= &meta_queue_process_complete
;
1977 /* XXX: TODO: These should be runtime configurable via vty */
1978 zebra
->ribq
->spec
.max_retries
= 3;
1979 zebra
->ribq
->spec
.hold
= ZEBRA_RIB_PROCESS_HOLD_TIME
;
1981 if (!(zebra
->mq
= meta_queue_new())) {
1982 zlog_err("%s: could not initialise meta queue!", __func__
);
1988 /* RIB updates are processed via a queue of pointers to route_nodes.
1990 * The queue length is bounded by the maximal size of the routing table,
1991 * as a route_node will not be requeued, if already queued.
1993 * REs are submitted via rib_addnode or rib_delnode which set minimal
1994 * state, or static_install_route (when an existing RE is updated)
1995 * and then submit route_node to queue for best-path selection later.
1996 * Order of add/delete state changes are preserved for any given RE.
1998 * Deleted REs are reaped during best-path selection.
2001 * |-> rib_link or unset ROUTE_ENTRY_REMOVE |->Update kernel with
2002 * |-------->| | best RE, if required
2004 * static_install->|->rib_addqueue...... -> rib_process
2006 * |-------->| |-> rib_unlink
2007 * |-> set ROUTE_ENTRY_REMOVE |
2008 * rib_delnode (RE freed)
2010 * The 'info' pointer of a route_node points to a rib_dest_t
2011 * ('dest'). Queueing state for a route_node is kept on the dest. The
2012 * dest is created on-demand by rib_link() and is kept around at least
2013 * as long as there are ribs hanging off it (@see rib_gc_dest()).
2015 * Refcounting (aka "locking" throughout the GNU Zebra and Quagga code):
2017 * - route_nodes: refcounted by:
2018 * - dest attached to route_node:
2019 * - managed by: rib_link/rib_gc_dest
2020 * - route_node processing queue
2021 * - managed by: rib_addqueue, rib_process.
2025 /* Add RE to head of the route node. */
2026 static void rib_link(struct route_node
*rn
, struct route_entry
*re
, int process
)
2028 struct route_entry
*head
;
2031 const char *rmap_name
;
2035 dest
= rib_dest_from_rnode(rn
);
2037 if (IS_ZEBRA_DEBUG_RIB_DETAILED
)
2038 rnode_debug(rn
, re
->vrf_id
, "rn %p adding dest", rn
);
2040 dest
= XCALLOC(MTYPE_RIB_DEST
, sizeof(rib_dest_t
));
2041 route_lock_node(rn
); /* rn route table reference */
2046 head
= dest
->routes
;
2053 afi
= (rn
->p
.family
== AF_INET
)
2055 : (rn
->p
.family
== AF_INET6
) ? AFI_IP6
: AFI_MAX
;
2056 if (is_zebra_import_table_enabled(afi
, re
->table
)) {
2057 rmap_name
= zebra_get_import_table_route_map(afi
, re
->table
);
2058 zebra_add_import_table_entry(rn
, re
, rmap_name
);
2063 void rib_addnode(struct route_node
*rn
, struct route_entry
*re
, int process
)
2065 /* RE node has been un-removed before route-node is processed.
2066 * route_node must hence already be on the queue for processing..
2068 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
)) {
2069 if (IS_ZEBRA_DEBUG_RIB
)
2070 rnode_debug(rn
, re
->vrf_id
, "rn %p, un-removed re %p",
2071 (void *)rn
, (void *)re
);
2073 UNSET_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
);
2076 rib_link(rn
, re
, process
);
2082 * Detach a rib structure from a route_node.
2084 * Note that a call to rib_unlink() should be followed by a call to
2085 * rib_gc_dest() at some point. This allows a rib_dest_t that is no
2086 * longer required to be deleted.
2088 void rib_unlink(struct route_node
*rn
, struct route_entry
*re
)
2094 if (IS_ZEBRA_DEBUG_RIB
)
2095 rnode_debug(rn
, re
->vrf_id
, "rn %p, re %p", (void *)rn
,
2098 dest
= rib_dest_from_rnode(rn
);
2101 re
->next
->prev
= re
->prev
;
2104 re
->prev
->next
= re
->next
;
2106 dest
->routes
= re
->next
;
2109 if (dest
->selected_fib
== re
)
2110 dest
->selected_fib
= NULL
;
2112 /* free RE and nexthops */
2113 if (re
->type
== ZEBRA_ROUTE_STATIC
)
2114 zebra_deregister_rnh_static_nexthops(re
->vrf_id
,
2116 nexthops_free(re
->nexthop
);
2117 XFREE(MTYPE_RE
, re
);
2120 void rib_delnode(struct route_node
*rn
, struct route_entry
*re
)
2124 if (IS_ZEBRA_DEBUG_RIB
)
2125 rnode_debug(rn
, re
->vrf_id
, "rn %p, re %p, removing",
2126 (void *)rn
, (void *)re
);
2127 SET_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
);
2129 afi
= (rn
->p
.family
== AF_INET
)
2131 : (rn
->p
.family
== AF_INET6
) ? AFI_IP6
: AFI_MAX
;
2132 if (is_zebra_import_table_enabled(afi
, re
->table
)) {
2133 zebra_del_import_table_entry(rn
, re
);
2134 /* Just clean up if non main table */
2135 if (IS_ZEBRA_DEBUG_RIB
) {
2136 char buf
[SRCDEST2STR_BUFFER
];
2137 srcdest_rnode2str(rn
, buf
, sizeof(buf
));
2139 "%u:%s: Freeing route rn %p, re %p (type %d)",
2140 re
->vrf_id
, buf
, rn
, re
, re
->type
);
2149 /* This function dumps the contents of a given RE entry into
2150 * standard debug log. Calling function name and IP prefix in
2151 * question are passed as 1st and 2nd arguments.
2154 void _route_entry_dump(const char *func
, union prefixconstptr pp
,
2155 union prefixconstptr src_pp
,
2156 const struct route_entry
*re
)
2158 const struct prefix
*p
= pp
.p
;
2159 const struct prefix
*src_p
= src_pp
.p
;
2160 bool is_srcdst
= src_p
&& src_p
->prefixlen
;
2161 char straddr
[PREFIX_STRLEN
];
2162 char srcaddr
[PREFIX_STRLEN
];
2163 struct nexthop
*nexthop
;
2165 zlog_debug("%s: dumping RE entry %p for %s%s%s vrf %u", func
,
2166 (const void *)re
, prefix2str(pp
, straddr
, sizeof(straddr
)),
2167 is_srcdst
? " from " : "",
2168 is_srcdst
? prefix2str(src_pp
, srcaddr
, sizeof(srcaddr
))
2171 zlog_debug("%s: uptime == %lu, type == %u, instance == %d, table == %d",
2172 func
, (unsigned long)re
->uptime
, re
->type
, re
->instance
,
2175 "%s: metric == %u, mtu == %u, distance == %u, flags == %u, status == %u",
2176 func
, re
->metric
, re
->mtu
, re
->distance
, re
->flags
, re
->status
);
2177 zlog_debug("%s: nexthop_num == %u, nexthop_active_num == %u", func
,
2178 re
->nexthop_num
, re
->nexthop_active_num
);
2180 for (ALL_NEXTHOPS(re
->nexthop
, nexthop
)) {
2181 inet_ntop(p
->family
, &nexthop
->gate
, straddr
, INET6_ADDRSTRLEN
);
2182 zlog_debug("%s: %s %s[%u] with flags %s%s%s", func
,
2183 (nexthop
->rparent
? " NH" : "NH"), straddr
,
2185 (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
)
2188 (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
)
2191 (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_RECURSIVE
)
2195 zlog_debug("%s: dump complete", func
);
2198 /* This is an exported helper to rtm_read() to dump the strange
2199 * RE entry found by rib_lookup_ipv4_route()
2202 void rib_lookup_and_dump(struct prefix_ipv4
*p
, vrf_id_t vrf_id
)
2204 struct route_table
*table
;
2205 struct route_node
*rn
;
2206 struct route_entry
*re
;
2207 char prefix_buf
[INET_ADDRSTRLEN
];
2210 table
= zebra_vrf_table(AFI_IP
, SAFI_UNICAST
, vrf_id
);
2212 zlog_err("%s: zebra_vrf_table() returned NULL", __func__
);
2216 /* Scan the RIB table for exactly matching RE entry. */
2217 rn
= route_node_lookup(table
, (struct prefix
*)p
);
2219 /* No route for this prefix. */
2221 zlog_debug("%s: lookup failed for %s", __func__
,
2222 prefix2str((struct prefix
*)p
, prefix_buf
,
2223 sizeof(prefix_buf
)));
2228 route_unlock_node(rn
);
2231 RNODE_FOREACH_RE (rn
, re
) {
2232 zlog_debug("%s: rn %p, re %p: %s, %s", __func__
, (void *)rn
,
2234 (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
)
2237 (CHECK_FLAG(re
->flags
, ZEBRA_FLAG_SELECTED
)
2240 route_entry_dump(p
, NULL
, re
);
2244 /* Check if requested address assignment will fail due to another
2245 * route being installed by zebra in FIB already. Take necessary
2246 * actions, if needed: remove such a route from FIB and deSELECT
2247 * corresponding RE entry. Then put affected RN into RIBQ head.
2249 void rib_lookup_and_pushup(struct prefix_ipv4
*p
, vrf_id_t vrf_id
)
2251 struct route_table
*table
;
2252 struct route_node
*rn
;
2253 unsigned changed
= 0;
2256 if (NULL
== (table
= zebra_vrf_table(AFI_IP
, SAFI_UNICAST
, vrf_id
))) {
2257 zlog_err("%s: zebra_vrf_table() returned NULL", __func__
);
2261 /* No matches would be the simplest case. */
2262 if (NULL
== (rn
= route_node_lookup(table
, (struct prefix
*)p
)))
2266 route_unlock_node(rn
);
2268 dest
= rib_dest_from_rnode(rn
);
2269 /* Check all RE entries. In case any changes have to be done, requeue
2270 * the RN into RIBQ head. If the routing message about the new connected
2271 * route (generated by the IP address we are going to assign very soon)
2272 * comes before the RIBQ is processed, the new RE entry will join
2273 * RIBQ record already on head. This is necessary for proper
2275 * of the rest of the RE.
2277 if (dest
->selected_fib
&& !RIB_SYSTEM_ROUTE(dest
->selected_fib
)) {
2279 if (IS_ZEBRA_DEBUG_RIB
) {
2280 char buf
[PREFIX_STRLEN
];
2282 zlog_debug("%u:%s: freeing way for connected prefix",
2283 dest
->selected_fib
->vrf_id
,
2284 prefix2str(&rn
->p
, buf
, sizeof(buf
)));
2285 route_entry_dump(&rn
->p
, NULL
, dest
->selected_fib
);
2287 rib_uninstall(rn
, dest
->selected_fib
);
2293 int rib_add_multipath(afi_t afi
, safi_t safi
, struct prefix
*p
,
2294 struct prefix_ipv6
*src_p
, struct route_entry
*re
)
2296 struct route_table
*table
;
2297 struct route_node
*rn
;
2298 struct route_entry
*same
;
2299 struct nexthop
*nexthop
;
2305 assert(!src_p
|| afi
== AFI_IP6
);
2308 table
= zebra_vrf_table_with_table_id(afi
, safi
, re
->vrf_id
, re
->table
);
2310 XFREE(MTYPE_RE
, re
);
2314 /* Make it sure prefixlen is applied to the prefix. */
2317 apply_mask_ipv6(src_p
);
2319 /* Set default distance by route type. */
2320 if (re
->distance
== 0) {
2321 re
->distance
= route_distance(re
->type
);
2323 /* iBGP distance is 200. */
2324 if (re
->type
== ZEBRA_ROUTE_BGP
2325 && CHECK_FLAG(re
->flags
, ZEBRA_FLAG_IBGP
))
2329 /* Lookup route node.*/
2330 rn
= srcdest_rnode_get(table
, p
, src_p
);
2332 /* If same type of route are installed, treat it as a implicit
2334 RNODE_FOREACH_RE (rn
, same
) {
2335 if (CHECK_FLAG(same
->status
, ROUTE_ENTRY_REMOVED
))
2338 if (same
->type
!= re
->type
)
2340 if (same
->instance
!= re
->instance
)
2342 if (same
->type
== ZEBRA_ROUTE_KERNEL
&&
2343 same
->metric
!= re
->metric
)
2346 * We should allow duplicate connected routes because of
2347 * IPv6 link-local routes and unnumbered interfaces on Linux.
2349 if (same
->type
!= ZEBRA_ROUTE_CONNECT
)
2353 /* If this route is kernel route, set FIB flag to the route. */
2354 if (RIB_SYSTEM_ROUTE(re
))
2355 for (nexthop
= re
->nexthop
; nexthop
; nexthop
= nexthop
->next
)
2356 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
2358 /* Link new re to node.*/
2359 if (IS_ZEBRA_DEBUG_RIB
) {
2362 "Inserting route rn %p, re %p (type %d) existing %p",
2363 (void *)rn
, (void *)re
, re
->type
, (void *)same
);
2365 if (IS_ZEBRA_DEBUG_RIB_DETAILED
)
2366 route_entry_dump(p
, src_p
, re
);
2368 rib_addnode(rn
, re
, 1);
2371 /* Free implicit route.*/
2373 rib_delnode(rn
, same
);
2377 route_unlock_node(rn
);
2381 void rib_delete(afi_t afi
, safi_t safi
, vrf_id_t vrf_id
, int type
,
2382 u_short instance
, int flags
, struct prefix
*p
,
2383 struct prefix_ipv6
*src_p
, const struct nexthop
*nh
,
2384 u_int32_t table_id
, u_int32_t metric
, bool fromkernel
,
2385 struct ethaddr
*rmac
)
2387 struct route_table
*table
;
2388 struct route_node
*rn
;
2389 struct route_entry
*re
;
2390 struct route_entry
*fib
= NULL
;
2391 struct route_entry
*same
= NULL
;
2392 struct nexthop
*rtnh
;
2393 char buf2
[INET6_ADDRSTRLEN
];
2396 assert(!src_p
|| afi
== AFI_IP6
);
2399 table
= zebra_vrf_table_with_table_id(afi
, safi
, vrf_id
, table_id
);
2406 apply_mask_ipv6(src_p
);
2408 /* Lookup route node. */
2409 rn
= srcdest_rnode_lookup(table
, p
, src_p
);
2411 char dst_buf
[PREFIX_STRLEN
], src_buf
[PREFIX_STRLEN
];
2413 prefix2str(p
, dst_buf
, sizeof(dst_buf
));
2414 if (src_p
&& src_p
->prefixlen
)
2415 prefix2str(src_p
, src_buf
, sizeof(src_buf
));
2419 if (IS_ZEBRA_DEBUG_RIB
)
2420 zlog_debug("%u:%s%s%s doesn't exist in rib", vrf_id
,
2422 (src_buf
[0] != '\0') ? " from " : "",
2427 dest
= rib_dest_from_rnode(rn
);
2428 fib
= dest
->selected_fib
;
2430 /* Lookup same type route. */
2431 RNODE_FOREACH_RE (rn
, re
) {
2432 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
))
2435 if (re
->type
!= type
)
2437 if (re
->instance
!= instance
)
2439 if (re
->type
== ZEBRA_ROUTE_KERNEL
&&
2440 re
->metric
!= metric
)
2442 if (re
->type
== ZEBRA_ROUTE_CONNECT
&& (rtnh
= re
->nexthop
)
2443 && rtnh
->type
== NEXTHOP_TYPE_IFINDEX
&& nh
) {
2444 if (rtnh
->ifindex
!= nh
->ifindex
)
2449 /* Make sure that the route found has the same gateway. */
2455 for (ALL_NEXTHOPS(re
->nexthop
, rtnh
))
2456 if (nexthop_same_no_recurse(rtnh
, nh
)) {
2464 /* If same type of route can't be found and this message is from
2468 * In the past(HA!) we could get here because
2469 * we were receiving a route delete from the
2470 * kernel and we're not marking the proto
2471 * as coming from it's appropriate originator.
2472 * Now that we are properly noticing the fact
2473 * that the kernel has deleted our route we
2474 * are not going to get called in this path
2475 * I am going to leave this here because
2476 * this might still work this way on non-linux
2477 * platforms as well as some weird state I have
2478 * not properly thought of yet.
2479 * If we can show that this code path is
2480 * dead then we can remove it.
2482 if (fib
&& type
== ZEBRA_ROUTE_KERNEL
2483 && CHECK_FLAG(flags
, ZEBRA_FLAG_SELFROUTE
)) {
2484 if (IS_ZEBRA_DEBUG_RIB
) {
2487 "rn %p, re %p (type %d) was deleted from kernel, adding",
2488 rn
, fib
, fib
->type
);
2492 for (rtnh
= fib
->nexthop
; rtnh
;
2494 UNSET_FLAG(rtnh
->flags
,
2498 * This is a non FRR route
2499 * as such we should mark
2502 dest
->selected_fib
= NULL
;
2504 /* This means someone else, other than Zebra,
2506 * a Zebra router from the kernel. We will add
2508 rib_install_kernel(rn
, fib
, NULL
);
2511 if (IS_ZEBRA_DEBUG_RIB
) {
2515 "via %s ifindex %d type %d "
2516 "doesn't exist in rib",
2520 INET_ADDRSTRLEN
), /* FIXME
2526 "type %d doesn't exist in rib",
2529 route_unlock_node(rn
);
2536 CHECK_FLAG(flags
, ZEBRA_FLAG_SELFROUTE
) &&
2538 rib_install_kernel(rn
, same
, NULL
);
2539 route_unlock_node(rn
);
2544 if (CHECK_FLAG(flags
, ZEBRA_FLAG_EVPN_ROUTE
)) {
2545 struct nexthop
*tmp_nh
;
2547 for (ALL_NEXTHOPS(re
->nexthop
, tmp_nh
)) {
2548 struct ipaddr vtep_ip
;
2550 memset(&vtep_ip
, 0, sizeof(struct ipaddr
));
2551 vtep_ip
.ipa_type
= IPADDR_V4
;
2552 memcpy(&(vtep_ip
.ipaddr_v4
),
2553 &(tmp_nh
->gate
.ipv4
),
2554 sizeof(struct in_addr
));
2555 zebra_vxlan_evpn_vrf_route_del(re
->vrf_id
, rmac
,
2559 rib_delnode(rn
, same
);
2562 route_unlock_node(rn
);
2567 int rib_add(afi_t afi
, safi_t safi
, vrf_id_t vrf_id
, int type
, u_short instance
,
2568 int flags
, struct prefix
*p
, struct prefix_ipv6
*src_p
,
2569 const struct nexthop
*nh
, u_int32_t table_id
, u_int32_t metric
,
2570 u_int32_t mtu
, uint8_t distance
, route_tag_t tag
)
2572 struct route_entry
*re
;
2573 struct nexthop
*nexthop
;
2575 /* Allocate new route_entry structure. */
2576 re
= XCALLOC(MTYPE_RE
, sizeof(struct route_entry
));
2578 re
->instance
= instance
;
2579 re
->distance
= distance
;
2581 re
->metric
= metric
;
2583 re
->table
= table_id
;
2584 re
->vrf_id
= vrf_id
;
2585 re
->nexthop_num
= 0;
2586 re
->uptime
= time(NULL
);
2590 nexthop
= nexthop_new();
2592 route_entry_nexthop_add(re
, nexthop
);
2594 return rib_add_multipath(afi
, safi
, p
, src_p
, re
);
2597 /* Schedule routes of a particular table (address-family) based on event. */
2598 static void rib_update_table(struct route_table
*table
,
2599 rib_update_event_t event
)
2601 struct route_node
*rn
;
2602 struct route_entry
*re
, *next
;
2604 /* Walk all routes and queue for processing, if appropriate for
2605 * the trigger event.
2607 for (rn
= route_top(table
); rn
; rn
= srcdest_route_next(rn
)) {
2609 * If we are looking at a route node and the node
2610 * has already been queued we don't
2611 * need to queue it up again
2614 && CHECK_FLAG(rib_dest_from_rnode(rn
)->flags
,
2615 RIB_ROUTE_ANY_QUEUED
))
2618 case RIB_UPDATE_IF_CHANGE
:
2619 /* Examine all routes that won't get processed by the
2621 * triggered by nexthop evaluation (NHT). This would be
2623 * kernel and certain static routes. Note that NHT will
2625 * triggered upon an interface event as connected routes
2627 * get queued for processing.
2629 RNODE_FOREACH_RE_SAFE (rn
, re
, next
) {
2632 if (re
->type
!= ZEBRA_ROUTE_SYSTEM
&&
2633 re
->type
!= ZEBRA_ROUTE_KERNEL
&&
2634 re
->type
!= ZEBRA_ROUTE_CONNECT
&&
2635 re
->type
!= ZEBRA_ROUTE_STATIC
)
2638 if (re
->type
!= ZEBRA_ROUTE_STATIC
) {
2643 for (nh
= re
->nexthop
; nh
; nh
= nh
->next
)
2644 if (!(nh
->type
== NEXTHOP_TYPE_IPV4
2645 || nh
->type
== NEXTHOP_TYPE_IPV6
))
2648 /* If we only have nexthops to a
2657 case RIB_UPDATE_RMAP_CHANGE
:
2658 case RIB_UPDATE_OTHER
:
2659 /* Right now, examine all routes. Can restrict to a
2661 * some cases (TODO).
2663 if (rnode_to_ribs(rn
))
2673 /* RIB update function. */
2674 void rib_update(vrf_id_t vrf_id
, rib_update_event_t event
)
2676 struct route_table
*table
;
2678 /* Process routes of interested address-families. */
2679 table
= zebra_vrf_table(AFI_IP
, SAFI_UNICAST
, vrf_id
);
2681 rib_update_table(table
, event
);
2683 table
= zebra_vrf_table(AFI_IP6
, SAFI_UNICAST
, vrf_id
);
2685 rib_update_table(table
, event
);
2688 /* Remove all routes which comes from non main table. */
2689 static void rib_weed_table(struct route_table
*table
)
2691 struct route_node
*rn
;
2692 struct route_entry
*re
;
2693 struct route_entry
*next
;
2696 for (rn
= route_top(table
); rn
; rn
= srcdest_route_next(rn
))
2697 RNODE_FOREACH_RE_SAFE (rn
, re
, next
) {
2698 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
))
2701 if (re
->table
!= zebrad
.rtm_table_default
2702 && re
->table
!= RT_TABLE_MAIN
)
2703 rib_delnode(rn
, re
);
2707 /* Delete all routes from non main table. */
2708 void rib_weed_tables(void)
2711 struct zebra_vrf
*zvrf
;
2713 RB_FOREACH (vrf
, vrf_id_head
, &vrfs_by_id
)
2714 if ((zvrf
= vrf
->info
) != NULL
) {
2715 rib_weed_table(zvrf
->table
[AFI_IP
][SAFI_UNICAST
]);
2716 rib_weed_table(zvrf
->table
[AFI_IP6
][SAFI_UNICAST
]);
2720 /* Delete self installed routes after zebra is relaunched. */
2721 static void rib_sweep_table(struct route_table
*table
)
2723 struct route_node
*rn
;
2724 struct route_entry
*re
;
2725 struct route_entry
*next
;
2726 struct nexthop
*nexthop
;
2731 for (rn
= route_top(table
); rn
; rn
= srcdest_route_next(rn
)) {
2732 RNODE_FOREACH_RE_SAFE (rn
, re
, next
) {
2733 if (IS_ZEBRA_DEBUG_RIB
)
2734 route_entry_dump(&rn
->p
, NULL
, re
);
2736 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
))
2739 if (!CHECK_FLAG(re
->flags
, ZEBRA_FLAG_SELFROUTE
))
2743 * So we are starting up and have received
2744 * routes from the kernel that we have installed
2745 * from a previous run of zebra but not cleaned
2746 * up ( say a kill -9 )
2747 * But since we haven't actually installed
2748 * them yet( we received them from the kernel )
2749 * we don't think they are active.
2750 * So let's pretend they are active to actually
2752 * In all honesty I'm not sure if we should
2753 * mark them as active when we receive them
2754 * This is startup only so probably ok.
2756 * If we ever decide to move rib_sweep_table
2757 * to a different spot (ie startup )
2758 * this decision needs to be revisited
2760 for (ALL_NEXTHOPS(re
->nexthop
, nexthop
))
2761 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
2763 rib_uninstall_kernel(rn
, re
);
2764 rib_delnode(rn
, re
);
2769 /* Sweep all RIB tables. */
2770 void rib_sweep_route(void)
2773 struct zebra_vrf
*zvrf
;
2775 RB_FOREACH (vrf
, vrf_id_head
, &vrfs_by_id
) {
2776 if ((zvrf
= vrf
->info
) == NULL
)
2779 rib_sweep_table(zvrf
->table
[AFI_IP
][SAFI_UNICAST
]);
2780 rib_sweep_table(zvrf
->table
[AFI_IP6
][SAFI_UNICAST
]);
2784 /* Remove specific by protocol routes from 'table'. */
2785 static unsigned long rib_score_proto_table(u_char proto
, u_short instance
,
2786 struct route_table
*table
)
2788 struct route_node
*rn
;
2789 struct route_entry
*re
;
2790 struct route_entry
*next
;
2791 unsigned long n
= 0;
2794 for (rn
= route_top(table
); rn
; rn
= srcdest_route_next(rn
))
2795 RNODE_FOREACH_RE_SAFE (rn
, re
, next
) {
2796 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
))
2798 if (re
->type
== proto
2799 && re
->instance
== instance
) {
2800 rib_delnode(rn
, re
);
2807 /* Remove specific by protocol routes. */
2808 unsigned long rib_score_proto(u_char proto
, u_short instance
)
2811 struct zebra_vrf
*zvrf
;
2812 unsigned long cnt
= 0;
2814 RB_FOREACH (vrf
, vrf_id_head
, &vrfs_by_id
)
2815 if ((zvrf
= vrf
->info
) != NULL
)
2816 cnt
+= rib_score_proto_table(
2818 zvrf
->table
[AFI_IP
][SAFI_UNICAST
])
2819 + rib_score_proto_table(
2821 zvrf
->table
[AFI_IP6
][SAFI_UNICAST
]);
2826 /* Close RIB and clean up kernel routes. */
2827 void rib_close_table(struct route_table
*table
)
2829 struct route_node
*rn
;
2830 rib_table_info_t
*info
;
2838 for (rn
= route_top(table
); rn
; rn
= srcdest_route_next(rn
)) {
2839 dest
= rib_dest_from_rnode(rn
);
2841 if (dest
&& dest
->selected_fib
) {
2842 if (info
->safi
== SAFI_UNICAST
)
2843 hook_call(rib_update
, rn
, NULL
);
2845 if (!RIB_SYSTEM_ROUTE(dest
->selected_fib
))
2846 rib_uninstall_kernel(rn
, dest
->selected_fib
);
2851 /* Routing information base initialize. */
2854 rib_queue_init(&zebrad
);
2860 * Get the first vrf id that is greater than the given vrf id if any.
2862 * Returns TRUE if a vrf id was found, FALSE otherwise.
2864 static inline int vrf_id_get_next(vrf_id_t vrf_id
, vrf_id_t
*next_id_p
)
2868 vrf
= vrf_lookup_by_id(vrf_id
);
2870 vrf
= RB_NEXT(vrf_id_head
, vrf
);
2872 *next_id_p
= vrf
->vrf_id
;
2881 * rib_tables_iter_next
2883 * Returns the next table in the iteration.
2885 struct route_table
*rib_tables_iter_next(rib_tables_iter_t
*iter
)
2887 struct route_table
*table
;
2890 * Array that helps us go over all AFI/SAFI combinations via one
2897 {AFI_IP
, SAFI_UNICAST
}, {AFI_IP
, SAFI_MULTICAST
},
2898 {AFI_IP
, SAFI_LABELED_UNICAST
}, {AFI_IP6
, SAFI_UNICAST
},
2899 {AFI_IP6
, SAFI_MULTICAST
}, {AFI_IP6
, SAFI_LABELED_UNICAST
},
2904 switch (iter
->state
) {
2906 case RIB_TABLES_ITER_S_INIT
:
2907 iter
->vrf_id
= VRF_DEFAULT
;
2908 iter
->afi_safi_ix
= -1;
2912 case RIB_TABLES_ITER_S_ITERATING
:
2913 iter
->afi_safi_ix
++;
2916 while (iter
->afi_safi_ix
2917 < (int)ZEBRA_NUM_OF(afi_safis
)) {
2918 table
= zebra_vrf_table(
2919 afi_safis
[iter
->afi_safi_ix
].afi
,
2920 afi_safis
[iter
->afi_safi_ix
].safi
,
2925 iter
->afi_safi_ix
++;
2929 * Found another table in this vrf.
2935 * Done with all tables in the current vrf, go to the
2939 if (!vrf_id_get_next(iter
->vrf_id
, &iter
->vrf_id
))
2942 iter
->afi_safi_ix
= 0;
2947 case RIB_TABLES_ITER_S_DONE
:
2952 iter
->state
= RIB_TABLES_ITER_S_ITERATING
;
2954 iter
->state
= RIB_TABLES_ITER_S_DONE
;