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/zebra_vrf.h"
46 #include "zebra/redistribute.h"
47 #include "zebra/zebra_routemap.h"
48 #include "zebra/debug.h"
49 #include "zebra/zebra_rnh.h"
50 #include "zebra/interface.h"
51 #include "zebra/connected.h"
52 #include "zebra/zebra_vxlan.h"
53 #include "zebra/zapi_msg.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(uint32_t table_id
)
143 if ((table_id
== RT_TABLE_UNSPEC
) || (table_id
== RT_TABLE_LOCAL
)
144 || (table_id
== RT_TABLE_COMPAT
))
151 int is_zebra_main_routing_table(uint32_t table_id
)
153 if ((table_id
== RT_TABLE_MAIN
)
154 || (table_id
== zebrad
.rtm_table_default
))
159 int zebra_check_addr(struct prefix
*p
)
161 if (p
->family
== AF_INET
) {
164 addr
= p
->u
.prefix4
.s_addr
;
167 if (IPV4_NET127(addr
) || IN_CLASSD(addr
)
168 || IPV4_LINKLOCAL(addr
))
171 if (p
->family
== AF_INET6
) {
172 if (IN6_IS_ADDR_LOOPBACK(&p
->u
.prefix6
))
174 if (IN6_IS_ADDR_LINKLOCAL(&p
->u
.prefix6
))
180 /* Add nexthop to the end of a rib node's nexthop list */
181 void route_entry_nexthop_add(struct route_entry
*re
, struct nexthop
*nexthop
)
183 nexthop_add(&re
->ng
.nexthop
, nexthop
);
189 * copy_nexthop - copy a nexthop to the rib structure.
191 void route_entry_copy_nexthops(struct route_entry
*re
, struct nexthop
*nh
)
193 assert(!re
->ng
.nexthop
);
194 copy_nexthops(&re
->ng
.nexthop
, nh
, NULL
);
195 for (struct nexthop
*nexthop
= nh
; nexthop
; nexthop
= nexthop
->next
)
199 /* Delete specified nexthop from the list. */
200 void route_entry_nexthop_delete(struct route_entry
*re
, struct nexthop
*nexthop
)
203 nexthop
->next
->prev
= nexthop
->prev
;
205 nexthop
->prev
->next
= nexthop
->next
;
207 re
->ng
.nexthop
= nexthop
->next
;
212 struct nexthop
*route_entry_nexthop_ifindex_add(struct route_entry
*re
,
216 struct nexthop
*nexthop
;
218 nexthop
= nexthop_new();
219 nexthop
->type
= NEXTHOP_TYPE_IFINDEX
;
220 nexthop
->ifindex
= ifindex
;
221 nexthop
->vrf_id
= nh_vrf_id
;
223 route_entry_nexthop_add(re
, nexthop
);
228 struct nexthop
*route_entry_nexthop_ipv4_add(struct route_entry
*re
,
229 struct in_addr
*ipv4
,
233 struct nexthop
*nexthop
;
235 nexthop
= nexthop_new();
236 nexthop
->type
= NEXTHOP_TYPE_IPV4
;
237 nexthop
->vrf_id
= nh_vrf_id
;
238 nexthop
->gate
.ipv4
= *ipv4
;
240 nexthop
->src
.ipv4
= *src
;
242 route_entry_nexthop_add(re
, nexthop
);
247 struct nexthop
*route_entry_nexthop_ipv4_ifindex_add(struct route_entry
*re
,
248 struct in_addr
*ipv4
,
253 struct nexthop
*nexthop
;
254 struct interface
*ifp
;
256 nexthop
= nexthop_new();
257 nexthop
->vrf_id
= nh_vrf_id
;
258 nexthop
->type
= NEXTHOP_TYPE_IPV4_IFINDEX
;
259 nexthop
->gate
.ipv4
= *ipv4
;
261 nexthop
->src
.ipv4
= *src
;
262 nexthop
->ifindex
= ifindex
;
263 ifp
= if_lookup_by_index(nexthop
->ifindex
, nh_vrf_id
);
264 /*Pending: need to think if null ifp here is ok during bootup?
265 There was a crash because ifp here was coming to be NULL */
267 if (connected_is_unnumbered(ifp
)
268 || CHECK_FLAG(re
->flags
, ZEBRA_FLAG_EVPN_ROUTE
)) {
269 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ONLINK
);
272 route_entry_nexthop_add(re
, nexthop
);
277 struct nexthop
*route_entry_nexthop_ipv6_add(struct route_entry
*re
,
278 struct in6_addr
*ipv6
,
281 struct nexthop
*nexthop
;
283 nexthop
= nexthop_new();
284 nexthop
->vrf_id
= nh_vrf_id
;
285 nexthop
->type
= NEXTHOP_TYPE_IPV6
;
286 nexthop
->gate
.ipv6
= *ipv6
;
288 route_entry_nexthop_add(re
, nexthop
);
293 struct nexthop
*route_entry_nexthop_ipv6_ifindex_add(struct route_entry
*re
,
294 struct in6_addr
*ipv6
,
298 struct nexthop
*nexthop
;
300 nexthop
= nexthop_new();
301 nexthop
->vrf_id
= nh_vrf_id
;
302 nexthop
->type
= NEXTHOP_TYPE_IPV6_IFINDEX
;
303 nexthop
->gate
.ipv6
= *ipv6
;
304 nexthop
->ifindex
= ifindex
;
305 if (CHECK_FLAG(re
->flags
, ZEBRA_FLAG_EVPN_ROUTE
))
306 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ONLINK
);
308 route_entry_nexthop_add(re
, nexthop
);
313 struct nexthop
*route_entry_nexthop_blackhole_add(struct route_entry
*re
,
314 enum blackhole_type bh_type
)
316 struct nexthop
*nexthop
;
318 nexthop
= nexthop_new();
319 nexthop
->vrf_id
= VRF_DEFAULT
;
320 nexthop
->type
= NEXTHOP_TYPE_BLACKHOLE
;
321 nexthop
->bh_type
= bh_type
;
323 route_entry_nexthop_add(re
, nexthop
);
328 static void nexthop_set_resolved(afi_t afi
, struct nexthop
*newhop
,
329 struct nexthop
*nexthop
)
331 struct nexthop
*resolved_hop
;
333 resolved_hop
= nexthop_new();
334 SET_FLAG(resolved_hop
->flags
, NEXTHOP_FLAG_ACTIVE
);
336 resolved_hop
->vrf_id
= nexthop
->vrf_id
;
337 switch (newhop
->type
) {
338 case NEXTHOP_TYPE_IPV4
:
339 case NEXTHOP_TYPE_IPV4_IFINDEX
:
340 /* If the resolving route specifies a gateway, use it */
341 resolved_hop
->type
= newhop
->type
;
342 resolved_hop
->gate
.ipv4
= newhop
->gate
.ipv4
;
344 if (newhop
->ifindex
) {
345 resolved_hop
->type
= NEXTHOP_TYPE_IPV4_IFINDEX
;
346 resolved_hop
->ifindex
= newhop
->ifindex
;
347 if (newhop
->flags
& NEXTHOP_FLAG_ONLINK
)
348 resolved_hop
->flags
|= NEXTHOP_FLAG_ONLINK
;
351 case NEXTHOP_TYPE_IPV6
:
352 case NEXTHOP_TYPE_IPV6_IFINDEX
:
353 resolved_hop
->type
= newhop
->type
;
354 resolved_hop
->gate
.ipv6
= newhop
->gate
.ipv6
;
356 if (newhop
->ifindex
) {
357 resolved_hop
->type
= NEXTHOP_TYPE_IPV6_IFINDEX
;
358 resolved_hop
->ifindex
= newhop
->ifindex
;
361 case NEXTHOP_TYPE_IFINDEX
:
362 /* If the resolving route is an interface route,
363 * it means the gateway we are looking up is connected
364 * to that interface. (The actual network is _not_ onlink).
365 * Therefore, the resolved route should have the original
366 * gateway as nexthop as it is directly connected.
368 * On Linux, we have to set the onlink netlink flag because
369 * otherwise, the kernel won't accept the route.
371 resolved_hop
->flags
|= NEXTHOP_FLAG_ONLINK
;
373 resolved_hop
->type
= NEXTHOP_TYPE_IPV4_IFINDEX
;
374 resolved_hop
->gate
.ipv4
= nexthop
->gate
.ipv4
;
375 } else if (afi
== AFI_IP6
) {
376 resolved_hop
->type
= NEXTHOP_TYPE_IPV6_IFINDEX
;
377 resolved_hop
->gate
.ipv6
= nexthop
->gate
.ipv6
;
379 resolved_hop
->ifindex
= newhop
->ifindex
;
381 case NEXTHOP_TYPE_BLACKHOLE
:
382 resolved_hop
->type
= NEXTHOP_TYPE_BLACKHOLE
;
383 resolved_hop
->bh_type
= nexthop
->bh_type
;
387 /* Copy labels of the resolved route */
388 if (newhop
->nh_label
)
389 nexthop_add_labels(resolved_hop
, newhop
->nh_label_type
,
390 newhop
->nh_label
->num_labels
,
391 &newhop
->nh_label
->label
[0]);
393 resolved_hop
->rparent
= nexthop
;
394 nexthop_add(&nexthop
->resolved
, resolved_hop
);
397 /* If force flag is not set, do not modify falgs at all for uninstall
398 the route from FIB. */
399 static int nexthop_active(afi_t afi
, struct route_entry
*re
,
400 struct nexthop
*nexthop
, int set
,
401 struct route_node
*top
)
404 struct route_table
*table
;
405 struct route_node
*rn
;
406 struct route_entry
*match
= NULL
;
408 struct nexthop
*newhop
;
409 struct interface
*ifp
;
412 if ((nexthop
->type
== NEXTHOP_TYPE_IPV4
)
413 || nexthop
->type
== NEXTHOP_TYPE_IPV6
)
414 nexthop
->ifindex
= 0;
417 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_RECURSIVE
);
418 nexthops_free(nexthop
->resolved
);
419 nexthop
->resolved
= NULL
;
423 /* Next hops (remote VTEPs) for EVPN routes are fully resolved. */
424 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_EVPN_RVTEP
))
427 /* Skip nexthops that have been filtered out due to route-map */
428 /* The nexthops are specific to this route and so the same */
429 /* nexthop for a different route may not have this flag set */
430 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FILTERED
))
434 * Check to see if we should trust the passed in information
435 * for UNNUMBERED interfaces as that we won't find the GW
436 * address in the routing table.
438 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ONLINK
)) {
439 ifp
= if_lookup_by_index(nexthop
->ifindex
, nexthop
->vrf_id
);
440 if (ifp
&& connected_is_unnumbered(ifp
)) {
441 if (if_is_operative(ifp
))
449 /* Make lookup prefix. */
450 memset(&p
, 0, sizeof(struct prefix
));
454 p
.prefixlen
= IPV4_MAX_PREFIXLEN
;
455 p
.u
.prefix4
= nexthop
->gate
.ipv4
;
459 p
.prefixlen
= IPV6_MAX_PREFIXLEN
;
460 p
.u
.prefix6
= nexthop
->gate
.ipv6
;
463 assert(afi
!= AFI_IP
&& afi
!= AFI_IP6
);
467 table
= zebra_vrf_table(afi
, SAFI_UNICAST
, nexthop
->vrf_id
);
471 rn
= route_node_match(table
, (struct prefix
*)&p
);
473 route_unlock_node(rn
);
475 /* Lookup should halt if we've matched against ourselves ('top',
476 * if specified) - i.e., we cannot have a nexthop NH1 is
477 * resolved by a route NH1. The exception is if the route is a
480 if (top
&& rn
== top
)
481 if (((afi
== AFI_IP
) && (rn
->p
.prefixlen
!= 32))
482 || ((afi
== AFI_IP6
) && (rn
->p
.prefixlen
!= 128)))
485 /* Pick up selected route. */
486 /* However, do not resolve over default route unless explicitly
488 if (is_default_prefix(&rn
->p
)
489 && !rnh_resolve_via_default(p
.family
))
492 dest
= rib_dest_from_rnode(rn
);
493 if (dest
&& dest
->selected_fib
494 && !CHECK_FLAG(dest
->selected_fib
->status
,
496 && dest
->selected_fib
->type
!= ZEBRA_ROUTE_TABLE
)
497 match
= dest
->selected_fib
;
499 /* If there is no selected route or matched route is EGP, go up
504 } while (rn
&& rn
->info
== NULL
);
511 if (match
->type
== ZEBRA_ROUTE_CONNECT
) {
512 /* Directly point connected route. */
513 newhop
= match
->ng
.nexthop
;
515 if (nexthop
->type
== NEXTHOP_TYPE_IPV4
516 || nexthop
->type
== NEXTHOP_TYPE_IPV6
)
517 nexthop
->ifindex
= newhop
->ifindex
;
520 } else if (CHECK_FLAG(re
->flags
, ZEBRA_FLAG_ALLOW_RECURSION
)) {
522 for (ALL_NEXTHOPS(match
->ng
, newhop
)) {
523 if (!CHECK_FLAG(newhop
->flags
,
526 if (CHECK_FLAG(newhop
->flags
,
527 NEXTHOP_FLAG_RECURSIVE
))
531 SET_FLAG(nexthop
->flags
,
532 NEXTHOP_FLAG_RECURSIVE
);
534 ROUTE_ENTRY_NEXTHOPS_CHANGED
);
535 nexthop_set_resolved(afi
, newhop
,
541 re
->nexthop_mtu
= match
->mtu
;
543 } else if (re
->type
== ZEBRA_ROUTE_STATIC
) {
545 for (ALL_NEXTHOPS(match
->ng
, newhop
)) {
546 if (!CHECK_FLAG(newhop
->flags
,
551 SET_FLAG(nexthop
->flags
,
552 NEXTHOP_FLAG_RECURSIVE
);
553 nexthop_set_resolved(afi
, newhop
,
559 re
->nexthop_mtu
= match
->mtu
;
568 struct route_entry
*rib_match(afi_t afi
, safi_t safi
, vrf_id_t vrf_id
,
569 union g_addr
*addr
, struct route_node
**rn_out
)
572 struct route_table
*table
;
573 struct route_node
*rn
;
574 struct route_entry
*match
= NULL
;
575 struct nexthop
*newhop
;
578 table
= zebra_vrf_table(afi
, safi
, vrf_id
);
582 memset(&p
, 0, sizeof(struct prefix
));
585 p
.u
.prefix4
= addr
->ipv4
;
586 p
.prefixlen
= IPV4_MAX_PREFIXLEN
;
588 p
.u
.prefix6
= addr
->ipv6
;
589 p
.prefixlen
= IPV6_MAX_PREFIXLEN
;
592 rn
= route_node_match(table
, (struct prefix
*)&p
);
597 route_unlock_node(rn
);
599 dest
= rib_dest_from_rnode(rn
);
600 if (dest
&& dest
->selected_fib
601 && !CHECK_FLAG(dest
->selected_fib
->status
,
602 ROUTE_ENTRY_REMOVED
))
603 match
= dest
->selected_fib
;
605 /* If there is no selected route or matched route is EGP, go up
610 } while (rn
&& rn
->info
== NULL
);
614 if (match
->type
!= ZEBRA_ROUTE_CONNECT
) {
616 for (ALL_NEXTHOPS(match
->ng
, newhop
))
617 if (CHECK_FLAG(newhop
->flags
,
634 struct route_entry
*rib_match_ipv4_multicast(vrf_id_t vrf_id
,
636 struct route_node
**rn_out
)
638 struct route_entry
*re
= NULL
, *mre
= NULL
, *ure
= NULL
;
639 struct route_node
*m_rn
= NULL
, *u_rn
= NULL
;
640 union g_addr gaddr
= {.ipv4
= addr
};
642 switch (ipv4_multicast_mode
) {
643 case MCAST_MRIB_ONLY
:
644 return rib_match(AFI_IP
, SAFI_MULTICAST
, vrf_id
, &gaddr
,
646 case MCAST_URIB_ONLY
:
647 return rib_match(AFI_IP
, SAFI_UNICAST
, vrf_id
, &gaddr
, rn_out
);
648 case MCAST_NO_CONFIG
:
649 case MCAST_MIX_MRIB_FIRST
:
650 re
= mre
= rib_match(AFI_IP
, SAFI_MULTICAST
, vrf_id
, &gaddr
,
653 re
= ure
= rib_match(AFI_IP
, SAFI_UNICAST
, vrf_id
,
656 case MCAST_MIX_DISTANCE
:
657 mre
= rib_match(AFI_IP
, SAFI_MULTICAST
, vrf_id
, &gaddr
, &m_rn
);
658 ure
= rib_match(AFI_IP
, SAFI_UNICAST
, vrf_id
, &gaddr
, &u_rn
);
660 re
= ure
->distance
< mre
->distance
? ure
: mre
;
666 case MCAST_MIX_PFXLEN
:
667 mre
= rib_match(AFI_IP
, SAFI_MULTICAST
, vrf_id
, &gaddr
, &m_rn
);
668 ure
= rib_match(AFI_IP
, SAFI_UNICAST
, vrf_id
, &gaddr
, &u_rn
);
670 re
= u_rn
->p
.prefixlen
> m_rn
->p
.prefixlen
? ure
: mre
;
679 *rn_out
= (re
== mre
) ? m_rn
: u_rn
;
681 if (IS_ZEBRA_DEBUG_RIB
) {
683 inet_ntop(AF_INET
, &addr
, buf
, BUFSIZ
);
685 zlog_debug("%s: %s: vrf: %u found %s, using %s",
686 __func__
, buf
, vrf_id
,
687 mre
? (ure
? "MRIB+URIB" : "MRIB")
688 : ure
? "URIB" : "nothing",
689 re
== ure
? "URIB" : re
== mre
? "MRIB" : "none");
694 void multicast_mode_ipv4_set(enum multicast_mode mode
)
696 if (IS_ZEBRA_DEBUG_RIB
)
697 zlog_debug("%s: multicast lookup mode set (%d)", __func__
,
699 ipv4_multicast_mode
= mode
;
702 enum multicast_mode
multicast_mode_ipv4_get(void)
704 return ipv4_multicast_mode
;
707 struct route_entry
*rib_lookup_ipv4(struct prefix_ipv4
*p
, vrf_id_t vrf_id
)
709 struct route_table
*table
;
710 struct route_node
*rn
;
711 struct route_entry
*match
= NULL
;
712 struct nexthop
*nexthop
;
716 table
= zebra_vrf_table(AFI_IP
, SAFI_UNICAST
, vrf_id
);
720 rn
= route_node_lookup(table
, (struct prefix
*)p
);
722 /* No route for this prefix. */
727 route_unlock_node(rn
);
728 dest
= rib_dest_from_rnode(rn
);
730 if (dest
&& dest
->selected_fib
731 && !CHECK_FLAG(dest
->selected_fib
->status
, ROUTE_ENTRY_REMOVED
))
732 match
= dest
->selected_fib
;
737 if (match
->type
== ZEBRA_ROUTE_CONNECT
)
740 for (ALL_NEXTHOPS(match
->ng
, nexthop
))
741 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
))
748 * This clone function, unlike its original rib_lookup_ipv4(), checks
749 * if specified IPv4 route record (prefix/mask -> gate) exists in
750 * the whole RIB and has ROUTE_ENTRY_SELECTED_FIB set.
754 * 0: exact match found
755 * 1: a match was found with a different gate
756 * 2: connected route found
757 * 3: no matches found
759 int rib_lookup_ipv4_route(struct prefix_ipv4
*p
, union sockunion
*qgate
,
762 struct route_table
*table
;
763 struct route_node
*rn
;
764 struct route_entry
*match
= NULL
;
765 struct nexthop
*nexthop
;
770 table
= zebra_vrf_table(AFI_IP
, SAFI_UNICAST
, vrf_id
);
772 return ZEBRA_RIB_LOOKUP_ERROR
;
774 /* Scan the RIB table for exactly matching RIB entry. */
775 rn
= route_node_lookup(table
, (struct prefix
*)p
);
777 /* No route for this prefix. */
779 return ZEBRA_RIB_NOTFOUND
;
782 route_unlock_node(rn
);
783 dest
= rib_dest_from_rnode(rn
);
785 /* Find out if a "selected" RR for the discovered RIB entry exists ever.
787 if (dest
&& dest
->selected_fib
788 && !CHECK_FLAG(dest
->selected_fib
->status
, ROUTE_ENTRY_REMOVED
))
789 match
= dest
->selected_fib
;
791 /* None such found :( */
793 return ZEBRA_RIB_NOTFOUND
;
795 if (match
->type
== ZEBRA_ROUTE_CONNECT
)
796 return ZEBRA_RIB_FOUND_CONNECTED
;
798 /* Ok, we have a cood candidate, let's check it's nexthop list... */
800 for (ALL_NEXTHOPS(match
->ng
, nexthop
))
801 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
)) {
803 if (nexthop
->gate
.ipv4
.s_addr
== sockunion2ip(qgate
))
804 return ZEBRA_RIB_FOUND_EXACT
;
805 if (IS_ZEBRA_DEBUG_RIB
) {
806 char gate_buf
[INET_ADDRSTRLEN
],
807 qgate_buf
[INET_ADDRSTRLEN
];
808 inet_ntop(AF_INET
, &nexthop
->gate
.ipv4
.s_addr
,
809 gate_buf
, INET_ADDRSTRLEN
);
810 inet_ntop(AF_INET
, &sockunion2ip(qgate
),
811 qgate_buf
, INET_ADDRSTRLEN
);
812 zlog_debug("%s: qgate == %s, %s == %s",
814 nexthop
->rparent
? "rgate" : "gate",
820 return ZEBRA_RIB_FOUND_NOGATE
;
822 return ZEBRA_RIB_NOTFOUND
;
825 #define RIB_SYSTEM_ROUTE(R) \
826 ((R)->type == ZEBRA_ROUTE_KERNEL || (R)->type == ZEBRA_ROUTE_CONNECT)
828 /* This function verifies reachability of one given nexthop, which can be
829 * numbered or unnumbered, IPv4 or IPv6. The result is unconditionally stored
830 * in nexthop->flags field. If the 4th parameter, 'set', is non-zero,
831 * nexthop->ifindex will be updated appropriately as well.
832 * An existing route map can turn (otherwise active) nexthop into inactive, but
835 * The return value is the final value of 'ACTIVE' flag.
838 static unsigned nexthop_active_check(struct route_node
*rn
,
839 struct route_entry
*re
,
840 struct nexthop
*nexthop
, int set
)
842 struct interface
*ifp
;
843 route_map_result_t ret
= RMAP_MATCH
;
845 char buf
[SRCDEST2STR_BUFFER
];
846 struct prefix
*p
, *src_p
;
847 srcdest_rnode_prefixes(rn
, &p
, &src_p
);
849 if (rn
->p
.family
== AF_INET
)
851 else if (rn
->p
.family
== AF_INET6
)
855 switch (nexthop
->type
) {
856 case NEXTHOP_TYPE_IFINDEX
:
857 ifp
= if_lookup_by_index(nexthop
->ifindex
, nexthop
->vrf_id
);
858 if (ifp
&& if_is_operative(ifp
))
859 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
861 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
863 case NEXTHOP_TYPE_IPV4
:
864 case NEXTHOP_TYPE_IPV4_IFINDEX
:
866 if (nexthop_active(AFI_IP
, re
, nexthop
, set
, rn
))
867 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
869 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
871 case NEXTHOP_TYPE_IPV6
:
873 if (nexthop_active(AFI_IP6
, re
, nexthop
, set
, rn
))
874 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
876 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
878 case NEXTHOP_TYPE_IPV6_IFINDEX
:
879 /* RFC 5549, v4 prefix with v6 NH */
880 if (rn
->p
.family
!= AF_INET
)
882 if (IN6_IS_ADDR_LINKLOCAL(&nexthop
->gate
.ipv6
)) {
883 ifp
= if_lookup_by_index(nexthop
->ifindex
,
885 if (ifp
&& if_is_operative(ifp
))
886 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
888 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
890 if (nexthop_active(AFI_IP6
, re
, nexthop
, set
, rn
))
891 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
893 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
896 case NEXTHOP_TYPE_BLACKHOLE
:
897 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
902 if (!CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
))
905 /* XXX: What exactly do those checks do? Do we support
906 * e.g. IPv4 routes with IPv6 nexthops or vice versa? */
907 if (RIB_SYSTEM_ROUTE(re
) || (family
== AFI_IP
&& p
->family
!= AF_INET
)
908 || (family
== AFI_IP6
&& p
->family
!= AF_INET6
))
909 return CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
911 /* The original code didn't determine the family correctly
912 * e.g. for NEXTHOP_TYPE_IFINDEX. Retrieve the correct afi
913 * from the rib_table_info in those cases.
914 * Possibly it may be better to use only the rib_table_info
918 rib_table_info_t
*info
;
920 info
= srcdest_rnode_table_info(rn
);
924 memset(&nexthop
->rmap_src
.ipv6
, 0, sizeof(union g_addr
));
926 /* It'll get set if required inside */
927 ret
= zebra_route_map_check(family
, re
->type
, p
, nexthop
,
928 nexthop
->vrf_id
, re
->tag
);
929 if (ret
== RMAP_DENYMATCH
) {
930 if (IS_ZEBRA_DEBUG_RIB
) {
931 srcdest_rnode2str(rn
, buf
, sizeof(buf
));
933 "%u:%s: Filtering out with NH out %s due to route map",
935 ifindex2ifname(nexthop
->ifindex
,
938 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
940 return CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
943 /* Iterate over all nexthops of the given RIB entry and refresh their
944 * ACTIVE flag. re->nexthop_active_num is updated accordingly. If any
945 * nexthop is found to toggle the ACTIVE flag, the whole re structure
946 * is flagged with ROUTE_ENTRY_CHANGED. The 4th 'set' argument is
947 * transparently passed to nexthop_active_check().
949 * Return value is the new number of active nexthops.
952 static int nexthop_active_update(struct route_node
*rn
, struct route_entry
*re
,
955 struct nexthop
*nexthop
;
956 union g_addr prev_src
;
957 unsigned int prev_active
, new_active
, old_num_nh
;
958 ifindex_t prev_index
;
959 old_num_nh
= re
->nexthop_active_num
;
961 re
->nexthop_active_num
= 0;
962 UNSET_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
);
964 for (nexthop
= re
->ng
.nexthop
; nexthop
; nexthop
= nexthop
->next
) {
965 /* No protocol daemon provides src and so we're skipping
967 prev_src
= nexthop
->rmap_src
;
968 prev_active
= CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
969 prev_index
= nexthop
->ifindex
;
970 if ((new_active
= nexthop_active_check(rn
, re
, nexthop
, set
)))
971 re
->nexthop_active_num
++;
972 /* Don't allow src setting on IPv6 addr for now */
973 if (prev_active
!= new_active
|| prev_index
!= nexthop
->ifindex
974 || ((nexthop
->type
>= NEXTHOP_TYPE_IFINDEX
975 && nexthop
->type
< NEXTHOP_TYPE_IPV6
)
976 && prev_src
.ipv4
.s_addr
977 != nexthop
->rmap_src
.ipv4
.s_addr
)
978 || ((nexthop
->type
>= NEXTHOP_TYPE_IPV6
979 && nexthop
->type
< NEXTHOP_TYPE_BLACKHOLE
)
980 && !(IPV6_ADDR_SAME(&prev_src
.ipv6
,
981 &nexthop
->rmap_src
.ipv6
)))) {
982 SET_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
);
983 SET_FLAG(re
->status
, ROUTE_ENTRY_NEXTHOPS_CHANGED
);
987 if (old_num_nh
!= re
->nexthop_active_num
)
988 SET_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
);
990 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
)) {
991 SET_FLAG(re
->status
, ROUTE_ENTRY_NEXTHOPS_CHANGED
);
994 return re
->nexthop_active_num
;
998 * Is this RIB labeled-unicast? It must be of type BGP and all paths
999 * (nexthops) must have a label.
1001 int zebra_rib_labeled_unicast(struct route_entry
*re
)
1003 struct nexthop
*nexthop
= NULL
;
1005 if (re
->type
!= ZEBRA_ROUTE_BGP
)
1008 for (ALL_NEXTHOPS(re
->ng
, nexthop
))
1009 if (!nexthop
->nh_label
|| !nexthop
->nh_label
->num_labels
)
1015 void kernel_route_rib_pass_fail(struct route_node
*rn
, struct prefix
*p
,
1016 struct route_entry
*re
,
1017 enum southbound_results res
)
1019 struct nexthop
*nexthop
;
1020 char buf
[PREFIX_STRLEN
];
1023 dest
= rib_dest_from_rnode(rn
);
1026 case SOUTHBOUND_INSTALL_SUCCESS
:
1027 dest
->selected_fib
= re
;
1028 for (ALL_NEXTHOPS(re
->ng
, nexthop
)) {
1029 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_RECURSIVE
))
1032 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
))
1033 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
1035 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
1037 zsend_route_notify_owner(re
, p
, ZAPI_ROUTE_INSTALLED
);
1039 case SOUTHBOUND_INSTALL_FAILURE
:
1041 * I am not sure this is the right thing to do here
1042 * but the code always set selected_fib before
1043 * this assignment was moved here.
1045 dest
->selected_fib
= re
;
1047 zsend_route_notify_owner(re
, p
, ZAPI_ROUTE_FAIL_INSTALL
);
1048 zlog_warn("%u:%s: Route install failed", re
->vrf_id
,
1049 prefix2str(p
, buf
, sizeof(buf
)));
1051 case SOUTHBOUND_DELETE_SUCCESS
:
1053 * The case where selected_fib is not re is
1054 * when we have received a system route
1055 * that is overriding our installed route
1056 * as such we should leave the selected_fib
1059 if (dest
->selected_fib
== re
)
1060 dest
->selected_fib
= NULL
;
1061 for (ALL_NEXTHOPS(re
->ng
, nexthop
))
1062 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
1064 zsend_route_notify_owner(re
, p
, ZAPI_ROUTE_REMOVED
);
1066 case SOUTHBOUND_DELETE_FAILURE
:
1068 * Should we set this to NULL if the
1071 dest
->selected_fib
= NULL
;
1072 zlog_warn("%u:%s: Route Deletion failure", re
->vrf_id
,
1073 prefix2str(p
, buf
, sizeof(buf
)));
1075 zsend_route_notify_owner(re
, p
, ZAPI_ROUTE_REMOVE_FAIL
);
1080 /* Update flag indicates whether this is a "replace" or not. Currently, this
1081 * is only used for IPv4.
1083 void rib_install_kernel(struct route_node
*rn
, struct route_entry
*re
,
1084 struct route_entry
*old
)
1086 struct nexthop
*nexthop
;
1087 rib_table_info_t
*info
= srcdest_rnode_table_info(rn
);
1088 struct prefix
*p
, *src_p
;
1089 struct zebra_vrf
*zvrf
= vrf_info_lookup(re
->vrf_id
);
1091 srcdest_rnode_prefixes(rn
, &p
, &src_p
);
1093 if (info
->safi
!= SAFI_UNICAST
) {
1094 for (ALL_NEXTHOPS(re
->ng
, nexthop
))
1095 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
1098 struct nexthop
*prev
;
1100 for (ALL_NEXTHOPS(re
->ng
, nexthop
)) {
1101 UNSET_FLAG (nexthop
->flags
, NEXTHOP_FLAG_DUPLICATE
);
1102 for (ALL_NEXTHOPS(re
->ng
, prev
)) {
1103 if (prev
== nexthop
)
1105 if (nexthop_same_firsthop(nexthop
, prev
)) {
1106 SET_FLAG(nexthop
->flags
,
1107 NEXTHOP_FLAG_DUPLICATE
);
1115 * If this is a replace to a new RE let the originator of the RE
1116 * know that they've lost
1118 if (old
&& (old
!= re
) && (old
->type
!= re
->type
))
1119 zsend_route_notify_owner(old
, p
, ZAPI_ROUTE_BETTER_ADMIN_WON
);
1122 * Make sure we update the FPM any time we send new information to
1125 hook_call(rib_update
, rn
, "installing in kernel");
1126 kernel_route_rib(rn
, p
, src_p
, old
, re
);
1132 /* Uninstall the route from kernel. */
1133 void rib_uninstall_kernel(struct route_node
*rn
, struct route_entry
*re
)
1135 struct nexthop
*nexthop
;
1136 rib_table_info_t
*info
= srcdest_rnode_table_info(rn
);
1137 struct prefix
*p
, *src_p
;
1138 struct zebra_vrf
*zvrf
= vrf_info_lookup(re
->vrf_id
);
1140 srcdest_rnode_prefixes(rn
, &p
, &src_p
);
1142 if (info
->safi
!= SAFI_UNICAST
) {
1143 for (ALL_NEXTHOPS(re
->ng
, nexthop
))
1144 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
1149 * Make sure we update the FPM any time we send new information to
1152 hook_call(rib_update
, rn
, "uninstalling from kernel");
1153 kernel_route_rib(rn
, p
, src_p
, re
, NULL
);
1160 /* Uninstall the route from kernel. */
1161 static void rib_uninstall(struct route_node
*rn
, struct route_entry
*re
)
1163 rib_table_info_t
*info
= srcdest_rnode_table_info(rn
);
1164 rib_dest_t
*dest
= rib_dest_from_rnode(rn
);
1166 if (dest
&& dest
->selected_fib
== re
) {
1167 if (info
->safi
== SAFI_UNICAST
)
1168 hook_call(rib_update
, rn
, "rib_uninstall");
1170 if (!RIB_SYSTEM_ROUTE(re
))
1171 rib_uninstall_kernel(rn
, re
);
1173 /* If labeled-unicast route, uninstall transit LSP. */
1174 if (zebra_rib_labeled_unicast(re
))
1175 zebra_mpls_lsp_uninstall(info
->zvrf
, rn
, re
);
1178 if (CHECK_FLAG(re
->flags
, ZEBRA_FLAG_SELECTED
)) {
1179 struct prefix
*p
, *src_p
;
1180 srcdest_rnode_prefixes(rn
, &p
, &src_p
);
1182 redistribute_delete(p
, src_p
, re
);
1183 UNSET_FLAG(re
->flags
, ZEBRA_FLAG_SELECTED
);
1188 * rib_can_delete_dest
1190 * Returns TRUE if the given dest can be deleted from the table.
1192 static int rib_can_delete_dest(rib_dest_t
*dest
)
1199 * Don't delete the dest if we have to update the FPM about this
1202 if (CHECK_FLAG(dest
->flags
, RIB_DEST_UPDATE_FPM
)
1203 || CHECK_FLAG(dest
->flags
, RIB_DEST_SENT_TO_FPM
))
1212 * Garbage collect the rib dest corresponding to the given route node
1215 * Returns TRUE if the dest was deleted, FALSE otherwise.
1217 int rib_gc_dest(struct route_node
*rn
)
1221 dest
= rib_dest_from_rnode(rn
);
1225 if (!rib_can_delete_dest(dest
))
1228 if (IS_ZEBRA_DEBUG_RIB
) {
1229 struct zebra_vrf
*zvrf
;
1231 zvrf
= rib_dest_vrf(dest
);
1232 rnode_debug(rn
, zvrf_id(zvrf
), "removing dest from table");
1236 XFREE(MTYPE_RIB_DEST
, dest
);
1240 * Release the one reference that we keep on the route node.
1242 route_unlock_node(rn
);
1246 static void rib_process_add_fib(struct zebra_vrf
*zvrf
, struct route_node
*rn
,
1247 struct route_entry
*new)
1249 rib_dest_t
*dest
= rib_dest_from_rnode(rn
);
1251 hook_call(rib_update
, rn
, "new route selected");
1253 /* Update real nexthop. This may actually determine if nexthop is active
1255 if (!nexthop_active_update(rn
, new, 1)) {
1256 UNSET_FLAG(new->status
, ROUTE_ENTRY_CHANGED
);
1260 if (IS_ZEBRA_DEBUG_RIB
) {
1261 char buf
[SRCDEST2STR_BUFFER
];
1262 srcdest_rnode2str(rn
, buf
, sizeof(buf
));
1263 zlog_debug("%u:%s: Adding route rn %p, re %p (type %d)",
1264 zvrf_id(zvrf
), buf
, rn
, new, new->type
);
1267 /* If labeled-unicast route, install transit LSP. */
1268 if (zebra_rib_labeled_unicast(new))
1269 zebra_mpls_lsp_install(zvrf
, rn
, new);
1271 if (!RIB_SYSTEM_ROUTE(new))
1272 rib_install_kernel(rn
, new, NULL
);
1274 dest
->selected_fib
= new;
1276 UNSET_FLAG(new->status
, ROUTE_ENTRY_CHANGED
);
1279 static void rib_process_del_fib(struct zebra_vrf
*zvrf
, struct route_node
*rn
,
1280 struct route_entry
*old
)
1282 rib_dest_t
*dest
= rib_dest_from_rnode(rn
);
1283 hook_call(rib_update
, rn
, "removing existing route");
1285 /* Uninstall from kernel. */
1286 if (IS_ZEBRA_DEBUG_RIB
) {
1287 char buf
[SRCDEST2STR_BUFFER
];
1288 srcdest_rnode2str(rn
, buf
, sizeof(buf
));
1289 zlog_debug("%u:%s: Deleting route rn %p, re %p (type %d)",
1290 zvrf_id(zvrf
), buf
, rn
, old
, old
->type
);
1293 /* If labeled-unicast route, uninstall transit LSP. */
1294 if (zebra_rib_labeled_unicast(old
))
1295 zebra_mpls_lsp_uninstall(zvrf
, rn
, old
);
1297 if (!RIB_SYSTEM_ROUTE(old
))
1298 rib_uninstall_kernel(rn
, old
);
1301 * We are setting this to NULL here
1302 * because that is what we traditionally
1303 * have been doing. I am not positive
1304 * that this is the right thing to do
1305 * but let's leave the code alone
1306 * for the RIB_SYSTEM_ROUTE case
1308 dest
->selected_fib
= NULL
;
1311 /* Update nexthop for route, reset changed flag. */
1312 nexthop_active_update(rn
, old
, 1);
1313 UNSET_FLAG(old
->status
, ROUTE_ENTRY_CHANGED
);
1316 static void rib_process_update_fib(struct zebra_vrf
*zvrf
,
1317 struct route_node
*rn
,
1318 struct route_entry
*old
,
1319 struct route_entry
*new)
1321 struct nexthop
*nexthop
= NULL
;
1323 rib_dest_t
*dest
= rib_dest_from_rnode(rn
);
1326 * We have to install or update if a new route has been selected or
1327 * something has changed.
1329 if (new != old
|| CHECK_FLAG(new->status
, ROUTE_ENTRY_CHANGED
)) {
1330 hook_call(rib_update
, rn
, "updating existing route");
1332 /* Update the nexthop; we could determine here that nexthop is
1334 if (nexthop_active_update(rn
, new, 1))
1337 /* If nexthop is active, install the selected route, if
1339 * the install succeeds, cleanup flags for prior route, if
1344 if (IS_ZEBRA_DEBUG_RIB
) {
1345 char buf
[SRCDEST2STR_BUFFER
];
1346 srcdest_rnode2str(rn
, buf
, sizeof(buf
));
1349 "%u:%s: Updating route rn %p, re %p (type %d) "
1351 zvrf_id(zvrf
), buf
, rn
, new,
1352 new->type
, old
, old
->type
);
1355 "%u:%s: Updating route rn %p, re %p (type %d)",
1356 zvrf_id(zvrf
), buf
, rn
, new,
1360 /* If labeled-unicast route, uninstall transit LSP. */
1361 if (zebra_rib_labeled_unicast(old
))
1362 zebra_mpls_lsp_uninstall(zvrf
, rn
, old
);
1364 /* Non-system route should be installed. */
1365 if (!RIB_SYSTEM_ROUTE(new)) {
1366 /* If labeled-unicast route, install transit
1368 if (zebra_rib_labeled_unicast(new))
1369 zebra_mpls_lsp_install(zvrf
, rn
, new);
1371 rib_install_kernel(rn
, new, old
);
1374 * We do not need to install the
1375 * selected route because it
1376 * is already isntalled by
1377 * the system( ie not us )
1378 * so just mark it as winning
1379 * we do need to ensure that
1380 * if we uninstall a route
1381 * from ourselves we don't
1382 * over write this pointer
1384 dest
->selected_fib
= NULL
;
1386 /* If install succeeded or system route, cleanup flags
1387 * for prior route. */
1389 if (RIB_SYSTEM_ROUTE(new)) {
1390 if (!RIB_SYSTEM_ROUTE(old
))
1391 rib_uninstall_kernel(rn
, old
);
1393 for (nexthop
= old
->ng
.nexthop
; nexthop
;
1394 nexthop
= nexthop
->next
)
1395 UNSET_FLAG(nexthop
->flags
,
1402 * If nexthop for selected route is not active or install
1404 * may need to uninstall and delete for redistribution.
1407 if (IS_ZEBRA_DEBUG_RIB
) {
1408 char buf
[SRCDEST2STR_BUFFER
];
1409 srcdest_rnode2str(rn
, buf
, sizeof(buf
));
1412 "%u:%s: Deleting route rn %p, re %p (type %d) "
1413 "old %p (type %d) - %s",
1414 zvrf_id(zvrf
), buf
, rn
, new,
1415 new->type
, old
, old
->type
,
1416 nh_active
? "install failed"
1417 : "nexthop inactive");
1420 "%u:%s: Deleting route rn %p, re %p (type %d) - %s",
1421 zvrf_id(zvrf
), buf
, rn
, new,
1423 nh_active
? "install failed"
1424 : "nexthop inactive");
1427 /* If labeled-unicast route, uninstall transit LSP. */
1428 if (zebra_rib_labeled_unicast(old
))
1429 zebra_mpls_lsp_uninstall(zvrf
, rn
, old
);
1431 if (!RIB_SYSTEM_ROUTE(old
))
1432 rib_uninstall_kernel(rn
, old
);
1434 dest
->selected_fib
= NULL
;
1438 * Same route selected; check if in the FIB and if not,
1440 * is housekeeping code to deal with race conditions in kernel
1442 * netlink reporting interface up before IPv4 or IPv6 protocol
1446 if (!RIB_SYSTEM_ROUTE(new)) {
1447 bool in_fib
= false;
1449 for (ALL_NEXTHOPS(new->ng
, nexthop
))
1450 if (CHECK_FLAG(nexthop
->flags
,
1451 NEXTHOP_FLAG_FIB
)) {
1456 rib_install_kernel(rn
, new, NULL
);
1460 /* Update prior route. */
1462 /* Set real nexthop. */
1463 nexthop_active_update(rn
, old
, 1);
1464 UNSET_FLAG(old
->status
, ROUTE_ENTRY_CHANGED
);
1467 /* Clear changed flag. */
1468 UNSET_FLAG(new->status
, ROUTE_ENTRY_CHANGED
);
1471 /* Check if 'alternate' RIB entry is better than 'current'. */
1472 static struct route_entry
*rib_choose_best(struct route_entry
*current
,
1473 struct route_entry
*alternate
)
1475 if (current
== NULL
)
1478 /* filter route selection in following order:
1479 * - connected beats other types
1480 * - lower distance beats higher
1481 * - lower metric beats higher for equal distance
1482 * - last, hence oldest, route wins tie break.
1485 /* Connected routes. Pick the last connected
1486 * route of the set of lowest metric connected routes.
1488 if (alternate
->type
== ZEBRA_ROUTE_CONNECT
) {
1489 if (current
->type
!= ZEBRA_ROUTE_CONNECT
1490 || alternate
->metric
<= current
->metric
)
1496 if (current
->type
== ZEBRA_ROUTE_CONNECT
)
1499 /* higher distance loses */
1500 if (alternate
->distance
< current
->distance
)
1502 if (current
->distance
< alternate
->distance
)
1505 /* metric tie-breaks equal distance */
1506 if (alternate
->metric
<= current
->metric
)
1512 /* Core function for processing routing information base. */
1513 static void rib_process(struct route_node
*rn
)
1515 struct route_entry
*re
;
1516 struct route_entry
*next
;
1517 struct route_entry
*old_selected
= NULL
;
1518 struct route_entry
*new_selected
= NULL
;
1519 struct route_entry
*old_fib
= NULL
;
1520 struct route_entry
*new_fib
= NULL
;
1521 struct route_entry
*best
= NULL
;
1522 char buf
[SRCDEST2STR_BUFFER
];
1524 struct zebra_vrf
*zvrf
= NULL
;
1525 struct prefix
*p
, *src_p
;
1526 srcdest_rnode_prefixes(rn
, &p
, &src_p
);
1527 vrf_id_t vrf_id
= VRF_UNKNOWN
;
1531 dest
= rib_dest_from_rnode(rn
);
1533 zvrf
= rib_dest_vrf(dest
);
1534 vrf_id
= zvrf_id(zvrf
);
1537 if (IS_ZEBRA_DEBUG_RIB
)
1538 srcdest_rnode2str(rn
, buf
, sizeof(buf
));
1540 if (IS_ZEBRA_DEBUG_RIB_DETAILED
)
1541 zlog_debug("%u:%s: Processing rn %p", vrf_id
, buf
, rn
);
1544 * we can have rn's that have a NULL info pointer
1545 * (dest). As such let's not let the deref happen
1546 * additionally we know RNODE_FOREACH_RE_SAFE
1547 * will not iterate so we are ok.
1550 old_fib
= dest
->selected_fib
;
1552 RNODE_FOREACH_RE_SAFE (rn
, re
, next
) {
1553 if (IS_ZEBRA_DEBUG_RIB_DETAILED
)
1555 "%u:%s: Examine re %p (type %d) status %x flags %x "
1556 "dist %d metric %d",
1557 vrf_id
, buf
, re
, re
->type
, re
->status
,
1558 re
->flags
, re
->distance
, re
->metric
);
1560 UNSET_FLAG(re
->status
, ROUTE_ENTRY_NEXTHOPS_CHANGED
);
1562 /* Currently selected re. */
1563 if (CHECK_FLAG(re
->flags
, ZEBRA_FLAG_SELECTED
)) {
1564 assert(old_selected
== NULL
);
1568 /* Skip deleted entries from selection */
1569 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
))
1572 /* Skip unreachable nexthop. */
1573 /* This first call to nexthop_active_update is merely to
1575 * there's any change to nexthops associated with this RIB
1577 * rib_process() can be invoked due to an external event such as
1579 * down or due to next-hop-tracking evaluation. In the latter
1581 * a decision has already been made that the NHs have changed.
1583 * need to invoke a potentially expensive call again. Further,
1585 * the change might be in a recursive NH which is not caught in
1586 * the nexthop_active_update() code. Thus, we might miss changes
1590 if (!CHECK_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
)
1591 && !nexthop_active_update(rn
, re
, 0)) {
1592 if (re
->type
== ZEBRA_ROUTE_TABLE
) {
1593 /* XXX: HERE BE DRAGONS!!!!!
1594 * In all honesty, I have not yet figured out
1596 * does or why the ROUTE_ENTRY_CHANGED test
1598 * or why we need to delete a route here, and
1600 * this concerns both selected and fib route, or
1603 /* This entry was denied by the 'ip protocol
1604 * table' route-map, we
1605 * need to delete it */
1606 if (re
!= old_selected
) {
1607 if (IS_ZEBRA_DEBUG_RIB
)
1609 "%s: %u:%s: imported via import-table but denied "
1610 "by the ip protocol table route-map",
1611 __func__
, vrf_id
, buf
);
1614 SET_FLAG(re
->status
,
1615 ROUTE_ENTRY_REMOVED
);
1621 /* Infinite distance. */
1622 if (re
->distance
== DISTANCE_INFINITY
) {
1623 UNSET_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
);
1627 if (CHECK_FLAG(re
->flags
, ZEBRA_FLAG_FIB_OVERRIDE
)) {
1628 best
= rib_choose_best(new_fib
, re
);
1629 if (new_fib
&& best
!= new_fib
)
1630 UNSET_FLAG(new_fib
->status
,
1631 ROUTE_ENTRY_CHANGED
);
1634 best
= rib_choose_best(new_selected
, re
);
1635 if (new_selected
&& best
!= new_selected
)
1636 UNSET_FLAG(new_selected
->status
,
1637 ROUTE_ENTRY_CHANGED
);
1638 new_selected
= best
;
1641 UNSET_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
);
1642 } /* RNODE_FOREACH_RE */
1644 /* If no FIB override route, use the selected route also for FIB */
1645 if (new_fib
== NULL
)
1646 new_fib
= new_selected
;
1648 /* After the cycle is finished, the following pointers will be set:
1649 * old_selected --- RE entry currently having SELECTED
1650 * new_selected --- RE entry that is newly SELECTED
1651 * old_fib --- RE entry currently in kernel FIB
1652 * new_fib --- RE entry that is newly to be in kernel FIB
1654 * new_selected will get SELECTED flag, and is going to be redistributed
1655 * the zclients. new_fib (which can be new_selected) will be installed
1659 if (IS_ZEBRA_DEBUG_RIB_DETAILED
) {
1661 "%u:%s: After processing: old_selected %p new_selected %p old_fib %p new_fib %p",
1662 vrf_id
, buf
, (void *)old_selected
, (void *)new_selected
,
1663 (void *)old_fib
, (void *)new_fib
);
1666 /* Buffer ROUTE_ENTRY_CHANGED here, because it will get cleared if
1667 * fib == selected */
1668 bool selected_changed
= new_selected
&& CHECK_FLAG(new_selected
->status
,
1669 ROUTE_ENTRY_CHANGED
);
1671 /* Update fib according to selection results */
1672 if (new_fib
&& old_fib
)
1673 rib_process_update_fib(zvrf
, rn
, old_fib
, new_fib
);
1675 rib_process_add_fib(zvrf
, rn
, new_fib
);
1677 rib_process_del_fib(zvrf
, rn
, old_fib
);
1679 /* Redistribute SELECTED entry */
1680 if (old_selected
!= new_selected
|| selected_changed
) {
1681 struct nexthop
*nexthop
= NULL
;
1683 /* Check if we have a FIB route for the destination, otherwise,
1684 * don't redistribute it */
1686 for (ALL_NEXTHOPS(new_fib
->ng
, nexthop
)) {
1687 if (CHECK_FLAG(nexthop
->flags
,
1688 NEXTHOP_FLAG_FIB
)) {
1694 new_selected
= NULL
;
1696 if (new_selected
&& new_selected
!= new_fib
) {
1697 nexthop_active_update(rn
, new_selected
, 1);
1698 UNSET_FLAG(new_selected
->status
, ROUTE_ENTRY_CHANGED
);
1703 redistribute_delete(p
, src_p
, old_selected
);
1704 if (old_selected
!= new_selected
)
1705 UNSET_FLAG(old_selected
->flags
,
1706 ZEBRA_FLAG_SELECTED
);
1710 /* Install new or replace existing redistributed entry
1712 SET_FLAG(new_selected
->flags
, ZEBRA_FLAG_SELECTED
);
1713 redistribute_update(p
, src_p
, new_selected
,
1718 /* Remove all RE entries queued for removal */
1719 RNODE_FOREACH_RE_SAFE (rn
, re
, next
) {
1720 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
)) {
1721 if (IS_ZEBRA_DEBUG_RIB
) {
1722 rnode_debug(rn
, vrf_id
, "rn %p, removing re %p",
1723 (void *)rn
, (void *)re
);
1730 * Check if the dest can be deleted now.
1735 /* Take a list of route_node structs and return 1, if there was a record
1736 * picked from it and processed by rib_process(). Don't process more,
1737 * than one RN record; operate only in the specified sub-queue.
1739 static unsigned int process_subq(struct list
*subq
, uint8_t qindex
)
1741 struct listnode
*lnode
= listhead(subq
);
1742 struct route_node
*rnode
;
1744 struct zebra_vrf
*zvrf
= NULL
;
1749 rnode
= listgetdata(lnode
);
1750 dest
= rib_dest_from_rnode(rnode
);
1752 zvrf
= rib_dest_vrf(dest
);
1756 if (IS_ZEBRA_DEBUG_RIB_DETAILED
) {
1757 char buf
[SRCDEST2STR_BUFFER
];
1758 srcdest_rnode2str(rnode
, buf
, sizeof(buf
));
1759 zlog_debug("%u:%s: rn %p dequeued from sub-queue %u",
1760 zvrf
? zvrf_id(zvrf
) : 0, buf
, rnode
, qindex
);
1764 UNSET_FLAG(rib_dest_from_rnode(rnode
)->flags
,
1765 RIB_ROUTE_QUEUED(qindex
));
1770 zlog_debug ("%s: called for route_node (%p, %d) with no ribs",
1771 __func__
, rnode
, rnode
->lock
);
1772 zlog_backtrace(LOG_DEBUG
);
1775 route_unlock_node(rnode
);
1776 list_delete_node(subq
, lnode
);
1781 * All meta queues have been processed. Trigger next-hop evaluation.
1783 static void meta_queue_process_complete(struct work_queue
*dummy
)
1786 struct zebra_vrf
*zvrf
;
1788 /* Evaluate nexthops for those VRFs which underwent route processing.
1790 * should limit the evaluation to the necessary VRFs in most common
1793 RB_FOREACH (vrf
, vrf_id_head
, &vrfs_by_id
) {
1795 if (zvrf
== NULL
|| !(zvrf
->flags
& ZEBRA_VRF_RIB_SCHEDULED
))
1798 zvrf
->flags
&= ~ZEBRA_VRF_RIB_SCHEDULED
;
1799 zebra_evaluate_rnh(zvrf_id(zvrf
), AF_INET
, 0, RNH_NEXTHOP_TYPE
,
1801 zebra_evaluate_rnh(zvrf_id(zvrf
), AF_INET
, 0,
1802 RNH_IMPORT_CHECK_TYPE
, NULL
);
1803 zebra_evaluate_rnh(zvrf_id(zvrf
), AF_INET6
, 0, RNH_NEXTHOP_TYPE
,
1805 zebra_evaluate_rnh(zvrf_id(zvrf
), AF_INET6
, 0,
1806 RNH_IMPORT_CHECK_TYPE
, NULL
);
1809 /* Schedule LSPs for processing, if needed. */
1810 zvrf
= vrf_info_lookup(VRF_DEFAULT
);
1811 if (mpls_should_lsps_be_processed(zvrf
)) {
1812 if (IS_ZEBRA_DEBUG_MPLS
)
1814 "%u: Scheduling all LSPs upon RIB completion",
1816 zebra_mpls_lsp_schedule(zvrf
);
1817 mpls_unmark_lsps_for_processing(zvrf
);
1821 /* Dispatch the meta queue by picking, processing and unlocking the next RN from
1822 * a non-empty sub-queue with lowest priority. wq is equal to zebra->ribq and
1824 * is pointed to the meta queue structure.
1826 static wq_item_status
meta_queue_process(struct work_queue
*dummy
, void *data
)
1828 struct meta_queue
*mq
= data
;
1831 for (i
= 0; i
< MQ_SIZE
; i
++)
1832 if (process_subq(mq
->subq
[i
], i
)) {
1836 return mq
->size
? WQ_REQUEUE
: WQ_SUCCESS
;
1840 * Map from rib types to queue type (priority) in meta queue
1842 static const uint8_t meta_queue_map
[ZEBRA_ROUTE_MAX
] = {
1843 [ZEBRA_ROUTE_SYSTEM
] = 4,
1844 [ZEBRA_ROUTE_KERNEL
] = 0,
1845 [ZEBRA_ROUTE_CONNECT
] = 0,
1846 [ZEBRA_ROUTE_STATIC
] = 1,
1847 [ZEBRA_ROUTE_RIP
] = 2,
1848 [ZEBRA_ROUTE_RIPNG
] = 2,
1849 [ZEBRA_ROUTE_OSPF
] = 2,
1850 [ZEBRA_ROUTE_OSPF6
] = 2,
1851 [ZEBRA_ROUTE_ISIS
] = 2,
1852 [ZEBRA_ROUTE_BGP
] = 3,
1853 [ZEBRA_ROUTE_PIM
] = 4, // Shouldn't happen but for safety
1854 [ZEBRA_ROUTE_EIGRP
] = 2,
1855 [ZEBRA_ROUTE_NHRP
] = 2,
1856 [ZEBRA_ROUTE_HSLS
] = 4,
1857 [ZEBRA_ROUTE_OLSR
] = 4,
1858 [ZEBRA_ROUTE_TABLE
] = 1,
1859 [ZEBRA_ROUTE_LDP
] = 4,
1860 [ZEBRA_ROUTE_VNC
] = 3,
1861 [ZEBRA_ROUTE_VNC_DIRECT
] = 3,
1862 [ZEBRA_ROUTE_VNC_DIRECT_RH
] = 3,
1863 [ZEBRA_ROUTE_BGP_DIRECT
] = 3,
1864 [ZEBRA_ROUTE_BGP_DIRECT_EXT
] = 3,
1865 [ZEBRA_ROUTE_BABEL
] = 2,
1866 [ZEBRA_ROUTE_ALL
] = 4, // Shouldn't happen but for safety
1869 /* Look into the RN and queue it into one or more priority queues,
1870 * increasing the size for each data push done.
1872 static void rib_meta_queue_add(struct meta_queue
*mq
, struct route_node
*rn
)
1874 struct route_entry
*re
;
1876 RNODE_FOREACH_RE (rn
, re
) {
1877 uint8_t qindex
= meta_queue_map
[re
->type
];
1878 struct zebra_vrf
*zvrf
;
1880 /* Invariant: at this point we always have rn->info set. */
1881 if (CHECK_FLAG(rib_dest_from_rnode(rn
)->flags
,
1882 RIB_ROUTE_QUEUED(qindex
))) {
1883 if (IS_ZEBRA_DEBUG_RIB_DETAILED
)
1886 "rn %p is already queued in sub-queue %u",
1887 (void *)rn
, qindex
);
1891 SET_FLAG(rib_dest_from_rnode(rn
)->flags
,
1892 RIB_ROUTE_QUEUED(qindex
));
1893 listnode_add(mq
->subq
[qindex
], rn
);
1894 route_lock_node(rn
);
1897 if (IS_ZEBRA_DEBUG_RIB_DETAILED
)
1898 rnode_debug(rn
, re
->vrf_id
,
1899 "queued rn %p into sub-queue %u",
1900 (void *)rn
, qindex
);
1902 zvrf
= zebra_vrf_lookup_by_id(re
->vrf_id
);
1904 zvrf
->flags
|= ZEBRA_VRF_RIB_SCHEDULED
;
1908 /* Add route_node to work queue and schedule processing */
1909 void rib_queue_add(struct route_node
*rn
)
1913 /* Pointless to queue a route_node with no RIB entries to add or remove
1915 if (!rnode_to_ribs(rn
)) {
1916 zlog_debug("%s: called for route_node (%p, %d) with no ribs",
1917 __func__
, (void *)rn
, rn
->lock
);
1918 zlog_backtrace(LOG_DEBUG
);
1922 if (zebrad
.ribq
== NULL
) {
1923 zlog_err("%s: work_queue does not exist!", __func__
);
1928 * The RIB queue should normally be either empty or holding the only
1929 * work_queue_item element. In the latter case this element would
1930 * hold a pointer to the meta queue structure, which must be used to
1931 * actually queue the route nodes to process. So create the MQ
1932 * holder, if necessary, then push the work into it in any case.
1933 * This semantics was introduced after 0.99.9 release.
1935 if (work_queue_empty(zebrad
.ribq
))
1936 work_queue_add(zebrad
.ribq
, zebrad
.mq
);
1938 rib_meta_queue_add(zebrad
.mq
, rn
);
1943 /* Create new meta queue.
1944 A destructor function doesn't seem to be necessary here.
1946 static struct meta_queue
*meta_queue_new(void)
1948 struct meta_queue
*new;
1951 new = XCALLOC(MTYPE_WORK_QUEUE
, sizeof(struct meta_queue
));
1954 for (i
= 0; i
< MQ_SIZE
; i
++) {
1955 new->subq
[i
] = list_new();
1956 assert(new->subq
[i
]);
1962 void meta_queue_free(struct meta_queue
*mq
)
1966 for (i
= 0; i
< MQ_SIZE
; i
++)
1967 list_delete_and_null(&mq
->subq
[i
]);
1969 XFREE(MTYPE_WORK_QUEUE
, mq
);
1972 /* initialise zebra rib work queue */
1973 static void rib_queue_init(struct zebra_t
*zebra
)
1978 work_queue_new(zebra
->master
, "route_node processing"))) {
1979 zlog_err("%s: could not initialise work queue!", __func__
);
1983 /* fill in the work queue spec */
1984 zebra
->ribq
->spec
.workfunc
= &meta_queue_process
;
1985 zebra
->ribq
->spec
.errorfunc
= NULL
;
1986 zebra
->ribq
->spec
.completion_func
= &meta_queue_process_complete
;
1987 /* XXX: TODO: These should be runtime configurable via vty */
1988 zebra
->ribq
->spec
.max_retries
= 3;
1989 zebra
->ribq
->spec
.hold
= ZEBRA_RIB_PROCESS_HOLD_TIME
;
1991 if (!(zebra
->mq
= meta_queue_new())) {
1992 zlog_err("%s: could not initialise meta queue!", __func__
);
1998 /* RIB updates are processed via a queue of pointers to route_nodes.
2000 * The queue length is bounded by the maximal size of the routing table,
2001 * as a route_node will not be requeued, if already queued.
2003 * REs are submitted via rib_addnode or rib_delnode which set minimal
2004 * state, or static_install_route (when an existing RE is updated)
2005 * and then submit route_node to queue for best-path selection later.
2006 * Order of add/delete state changes are preserved for any given RE.
2008 * Deleted REs are reaped during best-path selection.
2011 * |-> rib_link or unset ROUTE_ENTRY_REMOVE |->Update kernel with
2012 * |-------->| | best RE, if required
2014 * static_install->|->rib_addqueue...... -> rib_process
2016 * |-------->| |-> rib_unlink
2017 * |-> set ROUTE_ENTRY_REMOVE |
2018 * rib_delnode (RE freed)
2020 * The 'info' pointer of a route_node points to a rib_dest_t
2021 * ('dest'). Queueing state for a route_node is kept on the dest. The
2022 * dest is created on-demand by rib_link() and is kept around at least
2023 * as long as there are ribs hanging off it (@see rib_gc_dest()).
2025 * Refcounting (aka "locking" throughout the GNU Zebra and Quagga code):
2027 * - route_nodes: refcounted by:
2028 * - dest attached to route_node:
2029 * - managed by: rib_link/rib_gc_dest
2030 * - route_node processing queue
2031 * - managed by: rib_addqueue, rib_process.
2035 /* Add RE to head of the route node. */
2036 static void rib_link(struct route_node
*rn
, struct route_entry
*re
, int process
)
2038 struct route_entry
*head
;
2041 const char *rmap_name
;
2045 dest
= rib_dest_from_rnode(rn
);
2047 if (IS_ZEBRA_DEBUG_RIB_DETAILED
)
2048 rnode_debug(rn
, re
->vrf_id
, "rn %p adding dest", rn
);
2050 dest
= XCALLOC(MTYPE_RIB_DEST
, sizeof(rib_dest_t
));
2051 route_lock_node(rn
); /* rn route table reference */
2056 head
= dest
->routes
;
2063 afi
= (rn
->p
.family
== AF_INET
)
2065 : (rn
->p
.family
== AF_INET6
) ? AFI_IP6
: AFI_MAX
;
2066 if (is_zebra_import_table_enabled(afi
, re
->table
)) {
2067 rmap_name
= zebra_get_import_table_route_map(afi
, re
->table
);
2068 zebra_add_import_table_entry(rn
, re
, rmap_name
);
2073 void rib_addnode(struct route_node
*rn
, struct route_entry
*re
, int process
)
2075 /* RE node has been un-removed before route-node is processed.
2076 * route_node must hence already be on the queue for processing..
2078 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
)) {
2079 if (IS_ZEBRA_DEBUG_RIB
)
2080 rnode_debug(rn
, re
->vrf_id
, "rn %p, un-removed re %p",
2081 (void *)rn
, (void *)re
);
2083 UNSET_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
);
2086 rib_link(rn
, re
, process
);
2092 * Detach a rib structure from a route_node.
2094 * Note that a call to rib_unlink() should be followed by a call to
2095 * rib_gc_dest() at some point. This allows a rib_dest_t that is no
2096 * longer required to be deleted.
2098 void rib_unlink(struct route_node
*rn
, struct route_entry
*re
)
2104 if (IS_ZEBRA_DEBUG_RIB
)
2105 rnode_debug(rn
, re
->vrf_id
, "rn %p, re %p", (void *)rn
,
2108 dest
= rib_dest_from_rnode(rn
);
2111 re
->next
->prev
= re
->prev
;
2114 re
->prev
->next
= re
->next
;
2116 dest
->routes
= re
->next
;
2119 if (dest
->selected_fib
== re
)
2120 dest
->selected_fib
= NULL
;
2122 /* free RE and nexthops */
2123 if (re
->type
== ZEBRA_ROUTE_STATIC
)
2124 zebra_deregister_rnh_static_nexthops(re
->ng
.nexthop
->vrf_id
,
2125 re
->ng
.nexthop
, rn
);
2126 nexthops_free(re
->ng
.nexthop
);
2127 XFREE(MTYPE_RE
, re
);
2130 void rib_delnode(struct route_node
*rn
, struct route_entry
*re
)
2134 if (IS_ZEBRA_DEBUG_RIB
)
2135 rnode_debug(rn
, re
->vrf_id
, "rn %p, re %p, removing",
2136 (void *)rn
, (void *)re
);
2137 SET_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
);
2139 afi
= (rn
->p
.family
== AF_INET
)
2141 : (rn
->p
.family
== AF_INET6
) ? AFI_IP6
: AFI_MAX
;
2142 if (is_zebra_import_table_enabled(afi
, re
->table
)) {
2143 zebra_del_import_table_entry(rn
, re
);
2144 /* Just clean up if non main table */
2145 if (IS_ZEBRA_DEBUG_RIB
) {
2146 char buf
[SRCDEST2STR_BUFFER
];
2147 srcdest_rnode2str(rn
, buf
, sizeof(buf
));
2149 "%u:%s: Freeing route rn %p, re %p (type %d)",
2150 re
->vrf_id
, buf
, rn
, re
, re
->type
);
2159 /* This function dumps the contents of a given RE entry into
2160 * standard debug log. Calling function name and IP prefix in
2161 * question are passed as 1st and 2nd arguments.
2164 void _route_entry_dump(const char *func
, union prefixconstptr pp
,
2165 union prefixconstptr src_pp
,
2166 const struct route_entry
*re
)
2168 const struct prefix
*p
= pp
.p
;
2169 const struct prefix
*src_p
= src_pp
.p
;
2170 bool is_srcdst
= src_p
&& src_p
->prefixlen
;
2171 char straddr
[PREFIX_STRLEN
];
2172 char srcaddr
[PREFIX_STRLEN
];
2173 struct nexthop
*nexthop
;
2175 zlog_debug("%s: dumping RE entry %p for %s%s%s vrf %u", func
,
2176 (const void *)re
, prefix2str(pp
, straddr
, sizeof(straddr
)),
2177 is_srcdst
? " from " : "",
2178 is_srcdst
? prefix2str(src_pp
, srcaddr
, sizeof(srcaddr
))
2181 zlog_debug("%s: uptime == %lu, type == %u, instance == %d, table == %d",
2182 func
, (unsigned long)re
->uptime
, re
->type
, re
->instance
,
2185 "%s: metric == %u, mtu == %u, distance == %u, flags == %u, status == %u",
2186 func
, re
->metric
, re
->mtu
, re
->distance
, re
->flags
, re
->status
);
2187 zlog_debug("%s: nexthop_num == %u, nexthop_active_num == %u", func
,
2188 re
->nexthop_num
, re
->nexthop_active_num
);
2190 for (ALL_NEXTHOPS(re
->ng
, nexthop
)) {
2191 inet_ntop(p
->family
, &nexthop
->gate
, straddr
, INET6_ADDRSTRLEN
);
2192 zlog_debug("%s: %s %s[%u] vrf %u with flags %s%s%s", func
,
2193 (nexthop
->rparent
? " NH" : "NH"), straddr
,
2194 nexthop
->ifindex
, nexthop
->vrf_id
,
2195 (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
)
2198 (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
)
2201 (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_RECURSIVE
)
2205 zlog_debug("%s: dump complete", func
);
2208 /* This is an exported helper to rtm_read() to dump the strange
2209 * RE entry found by rib_lookup_ipv4_route()
2212 void rib_lookup_and_dump(struct prefix_ipv4
*p
, vrf_id_t vrf_id
)
2214 struct route_table
*table
;
2215 struct route_node
*rn
;
2216 struct route_entry
*re
;
2217 char prefix_buf
[INET_ADDRSTRLEN
];
2220 table
= zebra_vrf_table(AFI_IP
, SAFI_UNICAST
, vrf_id
);
2222 zlog_err("%s:%u zebra_vrf_table() returned NULL",
2227 /* Scan the RIB table for exactly matching RE entry. */
2228 rn
= route_node_lookup(table
, (struct prefix
*)p
);
2230 /* No route for this prefix. */
2232 zlog_debug("%s:%u lookup failed for %s", __func__
, vrf_id
,
2233 prefix2str((struct prefix
*)p
, prefix_buf
,
2234 sizeof(prefix_buf
)));
2239 route_unlock_node(rn
);
2242 RNODE_FOREACH_RE (rn
, re
) {
2243 zlog_debug("%s:%u rn %p, re %p: %s, %s",
2245 (void *)rn
, (void *)re
,
2246 (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
)
2249 (CHECK_FLAG(re
->flags
, ZEBRA_FLAG_SELECTED
)
2252 route_entry_dump(p
, NULL
, re
);
2256 /* Check if requested address assignment will fail due to another
2257 * route being installed by zebra in FIB already. Take necessary
2258 * actions, if needed: remove such a route from FIB and deSELECT
2259 * corresponding RE entry. Then put affected RN into RIBQ head.
2261 void rib_lookup_and_pushup(struct prefix_ipv4
*p
, vrf_id_t vrf_id
)
2263 struct route_table
*table
;
2264 struct route_node
*rn
;
2265 unsigned changed
= 0;
2268 if (NULL
== (table
= zebra_vrf_table(AFI_IP
, SAFI_UNICAST
, vrf_id
))) {
2269 zlog_err("%s:%u zebra_vrf_table() returned NULL",
2274 /* No matches would be the simplest case. */
2275 if (NULL
== (rn
= route_node_lookup(table
, (struct prefix
*)p
)))
2279 route_unlock_node(rn
);
2281 dest
= rib_dest_from_rnode(rn
);
2282 /* Check all RE entries. In case any changes have to be done, requeue
2283 * the RN into RIBQ head. If the routing message about the new connected
2284 * route (generated by the IP address we are going to assign very soon)
2285 * comes before the RIBQ is processed, the new RE entry will join
2286 * RIBQ record already on head. This is necessary for proper
2288 * of the rest of the RE.
2290 if (dest
->selected_fib
&& !RIB_SYSTEM_ROUTE(dest
->selected_fib
)) {
2292 if (IS_ZEBRA_DEBUG_RIB
) {
2293 char buf
[PREFIX_STRLEN
];
2295 zlog_debug("%u:%s: freeing way for connected prefix",
2296 dest
->selected_fib
->vrf_id
,
2297 prefix2str(&rn
->p
, buf
, sizeof(buf
)));
2298 route_entry_dump(&rn
->p
, NULL
, dest
->selected_fib
);
2300 rib_uninstall(rn
, dest
->selected_fib
);
2306 int rib_add_multipath(afi_t afi
, safi_t safi
, struct prefix
*p
,
2307 struct prefix_ipv6
*src_p
, struct route_entry
*re
)
2309 struct route_table
*table
;
2310 struct route_node
*rn
;
2311 struct route_entry
*same
;
2312 struct nexthop
*nexthop
;
2318 assert(!src_p
|| afi
== AFI_IP6
);
2321 table
= zebra_vrf_table_with_table_id(afi
, safi
, re
->vrf_id
, re
->table
);
2323 XFREE(MTYPE_RE
, re
);
2327 /* Make it sure prefixlen is applied to the prefix. */
2330 apply_mask_ipv6(src_p
);
2332 /* Set default distance by route type. */
2333 if (re
->distance
== 0) {
2334 re
->distance
= route_distance(re
->type
);
2336 /* iBGP distance is 200. */
2337 if (re
->type
== ZEBRA_ROUTE_BGP
2338 && CHECK_FLAG(re
->flags
, ZEBRA_FLAG_IBGP
))
2342 /* Lookup route node.*/
2343 rn
= srcdest_rnode_get(table
, p
, src_p
);
2345 /* If same type of route are installed, treat it as a implicit
2347 RNODE_FOREACH_RE (rn
, same
) {
2348 if (CHECK_FLAG(same
->status
, ROUTE_ENTRY_REMOVED
))
2351 if (same
->type
!= re
->type
)
2353 if (same
->instance
!= re
->instance
)
2355 if (same
->type
== ZEBRA_ROUTE_KERNEL
2356 && same
->metric
!= re
->metric
)
2359 * We should allow duplicate connected routes because of
2360 * IPv6 link-local routes and unnumbered interfaces on Linux.
2362 if (same
->type
!= ZEBRA_ROUTE_CONNECT
)
2366 /* If this route is kernel route, set FIB flag to the route. */
2367 if (RIB_SYSTEM_ROUTE(re
))
2368 for (nexthop
= re
->ng
.nexthop
; nexthop
; nexthop
= nexthop
->next
)
2369 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
2371 /* Link new re to node.*/
2372 if (IS_ZEBRA_DEBUG_RIB
) {
2375 "Inserting route rn %p, re %p (type %d) existing %p",
2376 (void *)rn
, (void *)re
, re
->type
, (void *)same
);
2378 if (IS_ZEBRA_DEBUG_RIB_DETAILED
)
2379 route_entry_dump(p
, src_p
, re
);
2381 rib_addnode(rn
, re
, 1);
2384 /* Free implicit route.*/
2386 rib_delnode(rn
, same
);
2390 route_unlock_node(rn
);
2394 void rib_delete(afi_t afi
, safi_t safi
, vrf_id_t vrf_id
, int type
,
2395 unsigned short instance
, int flags
, struct prefix
*p
,
2396 struct prefix_ipv6
*src_p
, const struct nexthop
*nh
,
2397 uint32_t table_id
, uint32_t metric
, bool fromkernel
,
2398 struct ethaddr
*rmac
)
2400 struct route_table
*table
;
2401 struct route_node
*rn
;
2402 struct route_entry
*re
;
2403 struct route_entry
*fib
= NULL
;
2404 struct route_entry
*same
= NULL
;
2405 struct nexthop
*rtnh
;
2406 char buf2
[INET6_ADDRSTRLEN
];
2409 assert(!src_p
|| afi
== AFI_IP6
);
2412 table
= zebra_vrf_table_with_table_id(afi
, safi
, vrf_id
, table_id
);
2419 apply_mask_ipv6(src_p
);
2421 /* Lookup route node. */
2422 rn
= srcdest_rnode_lookup(table
, p
, src_p
);
2424 char dst_buf
[PREFIX_STRLEN
], src_buf
[PREFIX_STRLEN
];
2426 prefix2str(p
, dst_buf
, sizeof(dst_buf
));
2427 if (src_p
&& src_p
->prefixlen
)
2428 prefix2str(src_p
, src_buf
, sizeof(src_buf
));
2432 if (IS_ZEBRA_DEBUG_RIB
)
2433 zlog_debug("%u:%s%s%s doesn't exist in rib", vrf_id
,
2435 (src_buf
[0] != '\0') ? " from " : "",
2440 dest
= rib_dest_from_rnode(rn
);
2441 fib
= dest
->selected_fib
;
2443 /* Lookup same type route. */
2444 RNODE_FOREACH_RE (rn
, re
) {
2445 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
))
2448 if (re
->type
!= type
)
2450 if (re
->instance
!= instance
)
2452 if (re
->type
== ZEBRA_ROUTE_KERNEL
&& re
->metric
!= metric
)
2454 if (re
->type
== ZEBRA_ROUTE_CONNECT
&& (rtnh
= re
->ng
.nexthop
)
2455 && rtnh
->type
== NEXTHOP_TYPE_IFINDEX
&& nh
) {
2456 if (rtnh
->ifindex
!= nh
->ifindex
)
2461 /* Make sure that the route found has the same gateway. */
2467 for (ALL_NEXTHOPS(re
->ng
, rtnh
))
2468 if (nexthop_same_no_recurse(rtnh
, nh
)) {
2476 /* If same type of route can't be found and this message is from
2480 * In the past(HA!) we could get here because
2481 * we were receiving a route delete from the
2482 * kernel and we're not marking the proto
2483 * as coming from it's appropriate originator.
2484 * Now that we are properly noticing the fact
2485 * that the kernel has deleted our route we
2486 * are not going to get called in this path
2487 * I am going to leave this here because
2488 * this might still work this way on non-linux
2489 * platforms as well as some weird state I have
2490 * not properly thought of yet.
2491 * If we can show that this code path is
2492 * dead then we can remove it.
2494 if (fib
&& CHECK_FLAG(flags
, ZEBRA_FLAG_SELFROUTE
)) {
2495 if (IS_ZEBRA_DEBUG_RIB
) {
2498 "rn %p, re %p (type %d) was deleted from kernel, adding",
2499 rn
, fib
, fib
->type
);
2503 for (rtnh
= fib
->ng
.nexthop
; rtnh
;
2505 UNSET_FLAG(rtnh
->flags
,
2509 * This is a non FRR route
2510 * as such we should mark
2513 dest
->selected_fib
= NULL
;
2515 /* This means someone else, other than Zebra,
2517 * a Zebra router from the kernel. We will add
2519 rib_install_kernel(rn
, fib
, NULL
);
2522 if (IS_ZEBRA_DEBUG_RIB
) {
2526 "via %s ifindex %d type %d "
2527 "doesn't exist in rib",
2531 INET_ADDRSTRLEN
), /* FIXME
2537 "type %d doesn't exist in rib",
2540 route_unlock_node(rn
);
2546 if (fromkernel
&& CHECK_FLAG(flags
, ZEBRA_FLAG_SELFROUTE
)
2548 rib_install_kernel(rn
, same
, NULL
);
2549 route_unlock_node(rn
);
2554 if (CHECK_FLAG(flags
, ZEBRA_FLAG_EVPN_ROUTE
)) {
2555 struct nexthop
*tmp_nh
;
2557 for (ALL_NEXTHOPS(re
->ng
, tmp_nh
)) {
2558 struct ipaddr vtep_ip
;
2560 memset(&vtep_ip
, 0, sizeof(struct ipaddr
));
2561 if (afi
== AFI_IP
) {
2562 vtep_ip
.ipa_type
= IPADDR_V4
;
2563 memcpy(&(vtep_ip
.ipaddr_v4
),
2564 &(tmp_nh
->gate
.ipv4
),
2565 sizeof(struct in_addr
));
2567 vtep_ip
.ipa_type
= IPADDR_V6
;
2568 memcpy(&(vtep_ip
.ipaddr_v6
),
2569 &(tmp_nh
->gate
.ipv6
),
2570 sizeof(struct in6_addr
));
2572 zebra_vxlan_evpn_vrf_route_del(re
->vrf_id
, rmac
,
2576 rib_delnode(rn
, same
);
2579 route_unlock_node(rn
);
2584 int rib_add(afi_t afi
, safi_t safi
, vrf_id_t vrf_id
, int type
,
2585 unsigned short instance
, int flags
, struct prefix
*p
,
2586 struct prefix_ipv6
*src_p
, const struct nexthop
*nh
,
2587 uint32_t table_id
, uint32_t metric
, uint32_t mtu
, uint8_t distance
,
2590 struct route_entry
*re
;
2591 struct nexthop
*nexthop
;
2593 /* Allocate new route_entry structure. */
2594 re
= XCALLOC(MTYPE_RE
, sizeof(struct route_entry
));
2596 re
->instance
= instance
;
2597 re
->distance
= distance
;
2599 re
->metric
= metric
;
2601 re
->table
= table_id
;
2602 re
->vrf_id
= vrf_id
;
2603 re
->nexthop_num
= 0;
2604 re
->uptime
= time(NULL
);
2608 nexthop
= nexthop_new();
2610 route_entry_nexthop_add(re
, nexthop
);
2612 return rib_add_multipath(afi
, safi
, p
, src_p
, re
);
2615 /* Schedule routes of a particular table (address-family) based on event. */
2616 static void rib_update_table(struct route_table
*table
,
2617 rib_update_event_t event
)
2619 struct route_node
*rn
;
2620 struct route_entry
*re
, *next
;
2622 /* Walk all routes and queue for processing, if appropriate for
2623 * the trigger event.
2625 for (rn
= route_top(table
); rn
; rn
= srcdest_route_next(rn
)) {
2627 * If we are looking at a route node and the node
2628 * has already been queued we don't
2629 * need to queue it up again
2631 if (rn
->info
&& CHECK_FLAG(rib_dest_from_rnode(rn
)->flags
,
2632 RIB_ROUTE_ANY_QUEUED
))
2635 case RIB_UPDATE_IF_CHANGE
:
2636 /* Examine all routes that won't get processed by the
2638 * triggered by nexthop evaluation (NHT). This would be
2640 * kernel and certain static routes. Note that NHT will
2642 * triggered upon an interface event as connected routes
2644 * get queued for processing.
2646 RNODE_FOREACH_RE_SAFE (rn
, re
, next
) {
2649 if (re
->type
!= ZEBRA_ROUTE_SYSTEM
2650 && re
->type
!= ZEBRA_ROUTE_KERNEL
2651 && re
->type
!= ZEBRA_ROUTE_CONNECT
2652 && re
->type
!= ZEBRA_ROUTE_STATIC
)
2655 if (re
->type
!= ZEBRA_ROUTE_STATIC
) {
2660 for (nh
= re
->ng
.nexthop
; nh
; nh
= nh
->next
)
2661 if (!(nh
->type
== NEXTHOP_TYPE_IPV4
2662 || nh
->type
== NEXTHOP_TYPE_IPV6
))
2665 /* If we only have nexthops to a
2674 case RIB_UPDATE_RMAP_CHANGE
:
2675 case RIB_UPDATE_OTHER
:
2676 /* Right now, examine all routes. Can restrict to a
2678 * some cases (TODO).
2680 if (rnode_to_ribs(rn
))
2690 /* RIB update function. */
2691 void rib_update(vrf_id_t vrf_id
, rib_update_event_t event
)
2693 struct route_table
*table
;
2695 /* Process routes of interested address-families. */
2696 table
= zebra_vrf_table(AFI_IP
, SAFI_UNICAST
, vrf_id
);
2698 rib_update_table(table
, event
);
2700 table
= zebra_vrf_table(AFI_IP6
, SAFI_UNICAST
, vrf_id
);
2702 rib_update_table(table
, event
);
2705 /* Delete self installed routes after zebra is relaunched. */
2706 void rib_sweep_table(struct route_table
*table
)
2708 struct route_node
*rn
;
2709 struct route_entry
*re
;
2710 struct route_entry
*next
;
2711 struct nexthop
*nexthop
;
2716 for (rn
= route_top(table
); rn
; rn
= srcdest_route_next(rn
)) {
2717 RNODE_FOREACH_RE_SAFE (rn
, re
, next
) {
2718 if (IS_ZEBRA_DEBUG_RIB
)
2719 route_entry_dump(&rn
->p
, NULL
, re
);
2721 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
))
2724 if (!CHECK_FLAG(re
->flags
, ZEBRA_FLAG_SELFROUTE
))
2728 * So we are starting up and have received
2729 * routes from the kernel that we have installed
2730 * from a previous run of zebra but not cleaned
2731 * up ( say a kill -9 )
2732 * But since we haven't actually installed
2733 * them yet( we received them from the kernel )
2734 * we don't think they are active.
2735 * So let's pretend they are active to actually
2737 * In all honesty I'm not sure if we should
2738 * mark them as active when we receive them
2739 * This is startup only so probably ok.
2741 * If we ever decide to move rib_sweep_table
2742 * to a different spot (ie startup )
2743 * this decision needs to be revisited
2745 for (ALL_NEXTHOPS(re
->ng
, nexthop
))
2746 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
2748 rib_uninstall_kernel(rn
, re
);
2749 rib_delnode(rn
, re
);
2754 /* Sweep all RIB tables. */
2755 void rib_sweep_route(void)
2758 struct zebra_vrf
*zvrf
;
2760 RB_FOREACH (vrf
, vrf_id_head
, &vrfs_by_id
) {
2761 if ((zvrf
= vrf
->info
) == NULL
)
2764 rib_sweep_table(zvrf
->table
[AFI_IP
][SAFI_UNICAST
]);
2765 rib_sweep_table(zvrf
->table
[AFI_IP6
][SAFI_UNICAST
]);
2768 zebra_ns_sweep_route();
2771 /* Remove specific by protocol routes from 'table'. */
2772 unsigned long rib_score_proto_table(uint8_t proto
, unsigned short instance
,
2773 struct route_table
*table
)
2775 struct route_node
*rn
;
2776 struct route_entry
*re
;
2777 struct route_entry
*next
;
2778 unsigned long n
= 0;
2781 for (rn
= route_top(table
); rn
; rn
= srcdest_route_next(rn
))
2782 RNODE_FOREACH_RE_SAFE (rn
, re
, next
) {
2783 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
))
2785 if (re
->type
== proto
2786 && re
->instance
== instance
) {
2787 rib_delnode(rn
, re
);
2794 /* Remove specific by protocol routes. */
2795 unsigned long rib_score_proto(uint8_t proto
, unsigned short instance
)
2798 struct zebra_vrf
*zvrf
;
2799 unsigned long cnt
= 0;
2801 RB_FOREACH (vrf
, vrf_id_head
, &vrfs_by_id
)
2802 if ((zvrf
= vrf
->info
) != NULL
)
2803 cnt
+= rib_score_proto_table(
2805 zvrf
->table
[AFI_IP
][SAFI_UNICAST
])
2806 + rib_score_proto_table(
2808 zvrf
->table
[AFI_IP6
][SAFI_UNICAST
]);
2810 cnt
+= zebra_ns_score_proto(proto
, instance
);
2815 /* Close RIB and clean up kernel routes. */
2816 void rib_close_table(struct route_table
*table
)
2818 struct route_node
*rn
;
2819 rib_table_info_t
*info
;
2827 for (rn
= route_top(table
); rn
; rn
= srcdest_route_next(rn
)) {
2828 dest
= rib_dest_from_rnode(rn
);
2830 if (dest
&& dest
->selected_fib
) {
2831 if (info
->safi
== SAFI_UNICAST
)
2832 hook_call(rib_update
, rn
, NULL
);
2834 if (!RIB_SYSTEM_ROUTE(dest
->selected_fib
))
2835 rib_uninstall_kernel(rn
, dest
->selected_fib
);
2840 /* Routing information base initialize. */
2843 rib_queue_init(&zebrad
);
2849 * Get the first vrf id that is greater than the given vrf id if any.
2851 * Returns TRUE if a vrf id was found, FALSE otherwise.
2853 static inline int vrf_id_get_next(vrf_id_t vrf_id
, vrf_id_t
*next_id_p
)
2857 vrf
= vrf_lookup_by_id(vrf_id
);
2859 vrf
= RB_NEXT(vrf_id_head
, vrf
);
2861 *next_id_p
= vrf
->vrf_id
;
2870 * rib_tables_iter_next
2872 * Returns the next table in the iteration.
2874 struct route_table
*rib_tables_iter_next(rib_tables_iter_t
*iter
)
2876 struct route_table
*table
;
2879 * Array that helps us go over all AFI/SAFI combinations via one
2886 {AFI_IP
, SAFI_UNICAST
}, {AFI_IP
, SAFI_MULTICAST
},
2887 {AFI_IP
, SAFI_LABELED_UNICAST
}, {AFI_IP6
, SAFI_UNICAST
},
2888 {AFI_IP6
, SAFI_MULTICAST
}, {AFI_IP6
, SAFI_LABELED_UNICAST
},
2893 switch (iter
->state
) {
2895 case RIB_TABLES_ITER_S_INIT
:
2896 iter
->vrf_id
= VRF_DEFAULT
;
2897 iter
->afi_safi_ix
= -1;
2901 case RIB_TABLES_ITER_S_ITERATING
:
2902 iter
->afi_safi_ix
++;
2905 while (iter
->afi_safi_ix
2906 < (int)ZEBRA_NUM_OF(afi_safis
)) {
2907 table
= zebra_vrf_table(
2908 afi_safis
[iter
->afi_safi_ix
].afi
,
2909 afi_safis
[iter
->afi_safi_ix
].safi
,
2914 iter
->afi_safi_ix
++;
2918 * Found another table in this vrf.
2924 * Done with all tables in the current vrf, go to the
2928 if (!vrf_id_get_next(iter
->vrf_id
, &iter
->vrf_id
))
2931 iter
->afi_safi_ix
= 0;
2936 case RIB_TABLES_ITER_S_DONE
:
2941 iter
->state
= RIB_TABLES_ITER_S_ITERATING
;
2943 iter
->state
= RIB_TABLES_ITER_S_DONE
;