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
->ng
.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
->ng
.nexthop
);
197 copy_nexthops(&re
->ng
.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
->ng
.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
,
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
->ng
.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
->ng
, 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
->ng
, 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
,
599 ROUTE_ENTRY_REMOVED
))
600 match
= dest
->selected_fib
;
602 /* If there is no selected route or matched route is EGP, go up
607 } while (rn
&& rn
->info
== NULL
);
611 if (match
->type
!= ZEBRA_ROUTE_CONNECT
) {
613 for (ALL_NEXTHOPS(match
->ng
, newhop
))
614 if (CHECK_FLAG(newhop
->flags
,
631 struct route_entry
*rib_match_ipv4_multicast(vrf_id_t vrf_id
,
633 struct route_node
**rn_out
)
635 struct route_entry
*re
= NULL
, *mre
= NULL
, *ure
= NULL
;
636 struct route_node
*m_rn
= NULL
, *u_rn
= NULL
;
637 union g_addr gaddr
= {.ipv4
= addr
};
639 switch (ipv4_multicast_mode
) {
640 case MCAST_MRIB_ONLY
:
641 return rib_match(AFI_IP
, SAFI_MULTICAST
, vrf_id
, &gaddr
,
643 case MCAST_URIB_ONLY
:
644 return rib_match(AFI_IP
, SAFI_UNICAST
, vrf_id
, &gaddr
, rn_out
);
645 case MCAST_NO_CONFIG
:
646 case MCAST_MIX_MRIB_FIRST
:
647 re
= mre
= rib_match(AFI_IP
, SAFI_MULTICAST
, vrf_id
, &gaddr
,
650 re
= ure
= rib_match(AFI_IP
, SAFI_UNICAST
, vrf_id
,
653 case MCAST_MIX_DISTANCE
:
654 mre
= rib_match(AFI_IP
, SAFI_MULTICAST
, vrf_id
, &gaddr
, &m_rn
);
655 ure
= rib_match(AFI_IP
, SAFI_UNICAST
, vrf_id
, &gaddr
, &u_rn
);
657 re
= ure
->distance
< mre
->distance
? ure
: mre
;
663 case MCAST_MIX_PFXLEN
:
664 mre
= rib_match(AFI_IP
, SAFI_MULTICAST
, vrf_id
, &gaddr
, &m_rn
);
665 ure
= rib_match(AFI_IP
, SAFI_UNICAST
, vrf_id
, &gaddr
, &u_rn
);
667 re
= u_rn
->p
.prefixlen
> m_rn
->p
.prefixlen
? ure
: mre
;
676 *rn_out
= (re
== mre
) ? m_rn
: u_rn
;
678 if (IS_ZEBRA_DEBUG_RIB
) {
680 inet_ntop(AF_INET
, &addr
, buf
, BUFSIZ
);
682 zlog_debug("%s: %s: found %s, using %s", __func__
, buf
,
683 mre
? (ure
? "MRIB+URIB" : "MRIB")
684 : ure
? "URIB" : "nothing",
685 re
== ure
? "URIB" : re
== mre
? "MRIB" : "none");
690 void multicast_mode_ipv4_set(enum multicast_mode mode
)
692 if (IS_ZEBRA_DEBUG_RIB
)
693 zlog_debug("%s: multicast lookup mode set (%d)", __func__
,
695 ipv4_multicast_mode
= mode
;
698 enum multicast_mode
multicast_mode_ipv4_get(void)
700 return ipv4_multicast_mode
;
703 struct route_entry
*rib_lookup_ipv4(struct prefix_ipv4
*p
, vrf_id_t vrf_id
)
705 struct route_table
*table
;
706 struct route_node
*rn
;
707 struct route_entry
*match
= NULL
;
708 struct nexthop
*nexthop
;
712 table
= zebra_vrf_table(AFI_IP
, SAFI_UNICAST
, vrf_id
);
716 rn
= route_node_lookup(table
, (struct prefix
*)p
);
718 /* No route for this prefix. */
723 route_unlock_node(rn
);
724 dest
= rib_dest_from_rnode(rn
);
726 if (dest
&& dest
->selected_fib
727 && !CHECK_FLAG(dest
->selected_fib
->status
, ROUTE_ENTRY_REMOVED
))
728 match
= dest
->selected_fib
;
733 if (match
->type
== ZEBRA_ROUTE_CONNECT
)
736 for (ALL_NEXTHOPS(match
->ng
, nexthop
))
737 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
))
744 * This clone function, unlike its original rib_lookup_ipv4(), checks
745 * if specified IPv4 route record (prefix/mask -> gate) exists in
746 * the whole RIB and has ROUTE_ENTRY_SELECTED_FIB set.
750 * 0: exact match found
751 * 1: a match was found with a different gate
752 * 2: connected route found
753 * 3: no matches found
755 int rib_lookup_ipv4_route(struct prefix_ipv4
*p
, union sockunion
*qgate
,
758 struct route_table
*table
;
759 struct route_node
*rn
;
760 struct route_entry
*match
= NULL
;
761 struct nexthop
*nexthop
;
766 table
= zebra_vrf_table(AFI_IP
, SAFI_UNICAST
, vrf_id
);
768 return ZEBRA_RIB_LOOKUP_ERROR
;
770 /* Scan the RIB table for exactly matching RIB entry. */
771 rn
= route_node_lookup(table
, (struct prefix
*)p
);
773 /* No route for this prefix. */
775 return ZEBRA_RIB_NOTFOUND
;
778 route_unlock_node(rn
);
779 dest
= rib_dest_from_rnode(rn
);
781 /* Find out if a "selected" RR for the discovered RIB entry exists ever.
783 if (dest
&& dest
->selected_fib
784 && !CHECK_FLAG(dest
->selected_fib
->status
, ROUTE_ENTRY_REMOVED
))
785 match
= dest
->selected_fib
;
787 /* None such found :( */
789 return ZEBRA_RIB_NOTFOUND
;
791 if (match
->type
== ZEBRA_ROUTE_CONNECT
)
792 return ZEBRA_RIB_FOUND_CONNECTED
;
794 /* Ok, we have a cood candidate, let's check it's nexthop list... */
796 for (ALL_NEXTHOPS(match
->ng
, nexthop
))
797 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
)) {
799 if (nexthop
->gate
.ipv4
.s_addr
== sockunion2ip(qgate
))
800 return ZEBRA_RIB_FOUND_EXACT
;
801 if (IS_ZEBRA_DEBUG_RIB
) {
802 char gate_buf
[INET_ADDRSTRLEN
],
803 qgate_buf
[INET_ADDRSTRLEN
];
804 inet_ntop(AF_INET
, &nexthop
->gate
.ipv4
.s_addr
,
805 gate_buf
, INET_ADDRSTRLEN
);
806 inet_ntop(AF_INET
, &sockunion2ip(qgate
),
807 qgate_buf
, INET_ADDRSTRLEN
);
808 zlog_debug("%s: qgate == %s, %s == %s",
810 nexthop
->rparent
? "rgate" : "gate",
816 return ZEBRA_RIB_FOUND_NOGATE
;
818 return ZEBRA_RIB_NOTFOUND
;
821 #define RIB_SYSTEM_ROUTE(R) \
822 ((R)->type == ZEBRA_ROUTE_KERNEL || (R)->type == ZEBRA_ROUTE_CONNECT)
824 /* This function verifies reachability of one given nexthop, which can be
825 * numbered or unnumbered, IPv4 or IPv6. The result is unconditionally stored
826 * in nexthop->flags field. If the 4th parameter, 'set', is non-zero,
827 * nexthop->ifindex will be updated appropriately as well.
828 * An existing route map can turn (otherwise active) nexthop into inactive, but
831 * The return value is the final value of 'ACTIVE' flag.
834 static unsigned nexthop_active_check(struct route_node
*rn
,
835 struct route_entry
*re
,
836 struct nexthop
*nexthop
, int set
)
838 struct interface
*ifp
;
839 route_map_result_t ret
= RMAP_MATCH
;
841 char buf
[SRCDEST2STR_BUFFER
];
842 struct prefix
*p
, *src_p
;
843 srcdest_rnode_prefixes(rn
, &p
, &src_p
);
845 if (rn
->p
.family
== AF_INET
)
847 else if (rn
->p
.family
== AF_INET6
)
851 switch (nexthop
->type
) {
852 case NEXTHOP_TYPE_IFINDEX
:
853 ifp
= if_lookup_by_index(nexthop
->ifindex
, nexthop
->vrf_id
);
854 if (ifp
&& if_is_operative(ifp
))
855 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
857 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
859 case NEXTHOP_TYPE_IPV4
:
860 case NEXTHOP_TYPE_IPV4_IFINDEX
:
862 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_EVPN_RVTEP
))
863 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
864 else if (nexthop_active(AFI_IP
, re
, nexthop
, set
, rn
))
865 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
867 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
869 case NEXTHOP_TYPE_IPV6
:
871 if (nexthop_active(AFI_IP6
, re
, nexthop
, set
, rn
))
872 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
874 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
876 case NEXTHOP_TYPE_IPV6_IFINDEX
:
877 /* RFC 5549, v4 prefix with v6 NH */
878 if (rn
->p
.family
!= AF_INET
)
880 if (IN6_IS_ADDR_LINKLOCAL(&nexthop
->gate
.ipv6
)) {
881 ifp
= if_lookup_by_index(nexthop
->ifindex
,
883 if (ifp
&& if_is_operative(ifp
))
884 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
886 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
888 if (nexthop_active(AFI_IP6
, re
, nexthop
, set
, rn
))
889 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
891 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
894 case NEXTHOP_TYPE_BLACKHOLE
:
895 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
900 if (!CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
))
903 /* XXX: What exactly do those checks do? Do we support
904 * e.g. IPv4 routes with IPv6 nexthops or vice versa? */
905 if (RIB_SYSTEM_ROUTE(re
) || (family
== AFI_IP
&& p
->family
!= AF_INET
)
906 || (family
== AFI_IP6
&& p
->family
!= AF_INET6
))
907 return CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
909 /* The original code didn't determine the family correctly
910 * e.g. for NEXTHOP_TYPE_IFINDEX. Retrieve the correct afi
911 * from the rib_table_info in those cases.
912 * Possibly it may be better to use only the rib_table_info
916 rib_table_info_t
*info
;
918 info
= srcdest_rnode_table_info(rn
);
922 memset(&nexthop
->rmap_src
.ipv6
, 0, sizeof(union g_addr
));
924 /* It'll get set if required inside */
925 ret
= zebra_route_map_check(family
, re
->type
, p
, nexthop
,
926 nexthop
->vrf_id
, re
->tag
);
927 if (ret
== RMAP_DENYMATCH
) {
928 if (IS_ZEBRA_DEBUG_RIB
) {
929 srcdest_rnode2str(rn
, buf
, sizeof(buf
));
931 "%u:%s: Filtering out with NH out %s due to route map",
933 ifindex2ifname(nexthop
->ifindex
,
936 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
938 return CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
941 /* Iterate over all nexthops of the given RIB entry and refresh their
942 * ACTIVE flag. re->nexthop_active_num is updated accordingly. If any
943 * nexthop is found to toggle the ACTIVE flag, the whole re structure
944 * is flagged with ROUTE_ENTRY_CHANGED. The 4th 'set' argument is
945 * transparently passed to nexthop_active_check().
947 * Return value is the new number of active nexthops.
950 static int nexthop_active_update(struct route_node
*rn
, struct route_entry
*re
,
953 struct nexthop
*nexthop
;
954 union g_addr prev_src
;
955 unsigned int prev_active
, new_active
, old_num_nh
;
956 ifindex_t prev_index
;
957 old_num_nh
= re
->nexthop_active_num
;
959 re
->nexthop_active_num
= 0;
960 UNSET_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
);
962 for (nexthop
= re
->ng
.nexthop
; nexthop
; nexthop
= nexthop
->next
) {
963 /* No protocol daemon provides src and so we're skipping
965 prev_src
= nexthop
->rmap_src
;
966 prev_active
= CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
967 prev_index
= nexthop
->ifindex
;
968 if ((new_active
= nexthop_active_check(rn
, re
, nexthop
, set
)))
969 re
->nexthop_active_num
++;
970 /* Don't allow src setting on IPv6 addr for now */
971 if (prev_active
!= new_active
|| prev_index
!= nexthop
->ifindex
972 || ((nexthop
->type
>= NEXTHOP_TYPE_IFINDEX
973 && nexthop
->type
< NEXTHOP_TYPE_IPV6
)
974 && prev_src
.ipv4
.s_addr
975 != nexthop
->rmap_src
.ipv4
.s_addr
)
976 || ((nexthop
->type
>= NEXTHOP_TYPE_IPV6
977 && nexthop
->type
< NEXTHOP_TYPE_BLACKHOLE
)
978 && !(IPV6_ADDR_SAME(&prev_src
.ipv6
,
979 &nexthop
->rmap_src
.ipv6
)))) {
980 SET_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
);
981 SET_FLAG(re
->status
, ROUTE_ENTRY_NEXTHOPS_CHANGED
);
985 if (old_num_nh
!= re
->nexthop_active_num
)
986 SET_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
);
988 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
)) {
989 SET_FLAG(re
->status
, ROUTE_ENTRY_NEXTHOPS_CHANGED
);
992 return re
->nexthop_active_num
;
996 * Is this RIB labeled-unicast? It must be of type BGP and all paths
997 * (nexthops) must have a label.
999 int zebra_rib_labeled_unicast(struct route_entry
*re
)
1001 struct nexthop
*nexthop
= NULL
;
1003 if (re
->type
!= ZEBRA_ROUTE_BGP
)
1006 for (ALL_NEXTHOPS(re
->ng
, nexthop
))
1007 if (!nexthop
->nh_label
|| !nexthop
->nh_label
->num_labels
)
1013 void kernel_route_rib_pass_fail(struct route_node
*rn
, struct prefix
*p
,
1014 struct route_entry
*re
,
1015 enum southbound_results res
)
1017 struct nexthop
*nexthop
;
1018 char buf
[PREFIX_STRLEN
];
1021 dest
= rib_dest_from_rnode(rn
);
1024 case SOUTHBOUND_INSTALL_SUCCESS
:
1025 dest
->selected_fib
= re
;
1026 for (ALL_NEXTHOPS(re
->ng
, nexthop
)) {
1027 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_RECURSIVE
))
1030 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
))
1031 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
1033 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
1035 zsend_route_notify_owner(re
, p
, ZAPI_ROUTE_INSTALLED
);
1037 case SOUTHBOUND_INSTALL_FAILURE
:
1039 * I am not sure this is the right thing to do here
1040 * but the code always set selected_fib before
1041 * this assignment was moved here.
1043 dest
->selected_fib
= re
;
1045 zsend_route_notify_owner(re
, p
, ZAPI_ROUTE_FAIL_INSTALL
);
1046 zlog_warn("%u:%s: Route install failed", re
->vrf_id
,
1047 prefix2str(p
, buf
, sizeof(buf
)));
1049 case SOUTHBOUND_DELETE_SUCCESS
:
1051 * The case where selected_fib is not re is
1052 * when we have received a system route
1053 * that is overriding our installed route
1054 * as such we should leave the selected_fib
1057 if (dest
->selected_fib
== re
)
1058 dest
->selected_fib
= NULL
;
1059 for (ALL_NEXTHOPS(re
->ng
, nexthop
))
1060 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
1062 zsend_route_notify_owner(re
, p
, ZAPI_ROUTE_REMOVED
);
1064 case SOUTHBOUND_DELETE_FAILURE
:
1066 * Should we set this to NULL if the
1069 dest
->selected_fib
= NULL
;
1070 zlog_warn("%u:%s: Route Deletion failure", re
->vrf_id
,
1071 prefix2str(p
, buf
, sizeof(buf
)));
1073 zsend_route_notify_owner(re
, p
, ZAPI_ROUTE_REMOVE_FAIL
);
1078 /* Update flag indicates whether this is a "replace" or not. Currently, this
1079 * is only used for IPv4.
1081 void rib_install_kernel(struct route_node
*rn
, struct route_entry
*re
,
1082 struct route_entry
*old
)
1084 struct nexthop
*nexthop
;
1085 rib_table_info_t
*info
= srcdest_rnode_table_info(rn
);
1086 struct prefix
*p
, *src_p
;
1087 struct zebra_vrf
*zvrf
= vrf_info_lookup(re
->vrf_id
);
1089 srcdest_rnode_prefixes(rn
, &p
, &src_p
);
1091 if (info
->safi
!= SAFI_UNICAST
) {
1092 for (ALL_NEXTHOPS(re
->ng
, nexthop
))
1093 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
1096 struct nexthop
*prev
;
1098 for (ALL_NEXTHOPS(re
->ng
, nexthop
)) {
1099 UNSET_FLAG (nexthop
->flags
, NEXTHOP_FLAG_DUPLICATE
);
1100 for (ALL_NEXTHOPS(re
->ng
, prev
)) {
1101 if (prev
== nexthop
)
1103 if (nexthop_same_firsthop(nexthop
, prev
)) {
1104 SET_FLAG(nexthop
->flags
,
1105 NEXTHOP_FLAG_DUPLICATE
);
1113 * If this is a replace to a new RE let the originator of the RE
1114 * know that they've lost
1116 if (old
&& (old
!= re
) && (old
->type
!= re
->type
))
1117 zsend_route_notify_owner(old
, p
, ZAPI_ROUTE_BETTER_ADMIN_WON
);
1120 * Make sure we update the FPM any time we send new information to
1123 hook_call(rib_update
, rn
, "installing in kernel");
1124 kernel_route_rib(rn
, p
, src_p
, old
, re
);
1130 /* Uninstall the route from kernel. */
1131 void rib_uninstall_kernel(struct route_node
*rn
, struct route_entry
*re
)
1133 struct nexthop
*nexthop
;
1134 rib_table_info_t
*info
= srcdest_rnode_table_info(rn
);
1135 struct prefix
*p
, *src_p
;
1136 struct zebra_vrf
*zvrf
= vrf_info_lookup(re
->vrf_id
);
1138 srcdest_rnode_prefixes(rn
, &p
, &src_p
);
1140 if (info
->safi
!= SAFI_UNICAST
) {
1141 for (ALL_NEXTHOPS(re
->ng
, nexthop
))
1142 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
1147 * Make sure we update the FPM any time we send new information to
1150 hook_call(rib_update
, rn
, "uninstalling from kernel");
1151 kernel_route_rib(rn
, p
, src_p
, re
, NULL
);
1158 /* Uninstall the route from kernel. */
1159 static void rib_uninstall(struct route_node
*rn
, struct route_entry
*re
)
1161 rib_table_info_t
*info
= srcdest_rnode_table_info(rn
);
1162 rib_dest_t
*dest
= rib_dest_from_rnode(rn
);
1164 if (dest
&& dest
->selected_fib
== re
) {
1165 if (info
->safi
== SAFI_UNICAST
)
1166 hook_call(rib_update
, rn
, "rib_uninstall");
1168 if (!RIB_SYSTEM_ROUTE(re
))
1169 rib_uninstall_kernel(rn
, re
);
1171 /* If labeled-unicast route, uninstall transit LSP. */
1172 if (zebra_rib_labeled_unicast(re
))
1173 zebra_mpls_lsp_uninstall(info
->zvrf
, rn
, re
);
1176 if (CHECK_FLAG(re
->flags
, ZEBRA_FLAG_SELECTED
)) {
1177 struct prefix
*p
, *src_p
;
1178 srcdest_rnode_prefixes(rn
, &p
, &src_p
);
1180 redistribute_delete(p
, src_p
, re
);
1181 UNSET_FLAG(re
->flags
, ZEBRA_FLAG_SELECTED
);
1186 * rib_can_delete_dest
1188 * Returns TRUE if the given dest can be deleted from the table.
1190 static int rib_can_delete_dest(rib_dest_t
*dest
)
1197 * Don't delete the dest if we have to update the FPM about this
1200 if (CHECK_FLAG(dest
->flags
, RIB_DEST_UPDATE_FPM
)
1201 || CHECK_FLAG(dest
->flags
, RIB_DEST_SENT_TO_FPM
))
1210 * Garbage collect the rib dest corresponding to the given route node
1213 * Returns TRUE if the dest was deleted, FALSE otherwise.
1215 int rib_gc_dest(struct route_node
*rn
)
1219 dest
= rib_dest_from_rnode(rn
);
1223 if (!rib_can_delete_dest(dest
))
1226 if (IS_ZEBRA_DEBUG_RIB
) {
1227 struct zebra_vrf
*zvrf
;
1229 zvrf
= rib_dest_vrf(dest
);
1230 rnode_debug(rn
, zvrf_id(zvrf
), "removing dest from table");
1234 XFREE(MTYPE_RIB_DEST
, dest
);
1238 * Release the one reference that we keep on the route node.
1240 route_unlock_node(rn
);
1244 static void rib_process_add_fib(struct zebra_vrf
*zvrf
, struct route_node
*rn
,
1245 struct route_entry
*new)
1247 rib_dest_t
*dest
= rib_dest_from_rnode(rn
);
1249 hook_call(rib_update
, rn
, "new route selected");
1251 /* Update real nexthop. This may actually determine if nexthop is active
1253 if (!nexthop_active_update(rn
, new, 1)) {
1254 UNSET_FLAG(new->status
, ROUTE_ENTRY_CHANGED
);
1258 if (IS_ZEBRA_DEBUG_RIB
) {
1259 char buf
[SRCDEST2STR_BUFFER
];
1260 srcdest_rnode2str(rn
, buf
, sizeof(buf
));
1261 zlog_debug("%u:%s: Adding route rn %p, re %p (type %d)",
1262 zvrf_id(zvrf
), buf
, rn
, new, new->type
);
1265 /* If labeled-unicast route, install transit LSP. */
1266 if (zebra_rib_labeled_unicast(new))
1267 zebra_mpls_lsp_install(zvrf
, rn
, new);
1269 if (!RIB_SYSTEM_ROUTE(new))
1270 rib_install_kernel(rn
, new, NULL
);
1272 dest
->selected_fib
= new;
1274 UNSET_FLAG(new->status
, ROUTE_ENTRY_CHANGED
);
1277 static void rib_process_del_fib(struct zebra_vrf
*zvrf
, struct route_node
*rn
,
1278 struct route_entry
*old
)
1280 rib_dest_t
*dest
= rib_dest_from_rnode(rn
);
1281 hook_call(rib_update
, rn
, "removing existing route");
1283 /* Uninstall from kernel. */
1284 if (IS_ZEBRA_DEBUG_RIB
) {
1285 char buf
[SRCDEST2STR_BUFFER
];
1286 srcdest_rnode2str(rn
, buf
, sizeof(buf
));
1287 zlog_debug("%u:%s: Deleting route rn %p, re %p (type %d)",
1288 zvrf_id(zvrf
), buf
, rn
, old
, old
->type
);
1291 /* If labeled-unicast route, uninstall transit LSP. */
1292 if (zebra_rib_labeled_unicast(old
))
1293 zebra_mpls_lsp_uninstall(zvrf
, rn
, old
);
1295 if (!RIB_SYSTEM_ROUTE(old
))
1296 rib_uninstall_kernel(rn
, old
);
1299 * We are setting this to NULL here
1300 * because that is what we traditionally
1301 * have been doing. I am not positive
1302 * that this is the right thing to do
1303 * but let's leave the code alone
1304 * for the RIB_SYSTEM_ROUTE case
1306 dest
->selected_fib
= NULL
;
1309 /* Update nexthop for route, reset changed flag. */
1310 nexthop_active_update(rn
, old
, 1);
1311 UNSET_FLAG(old
->status
, ROUTE_ENTRY_CHANGED
);
1314 static void rib_process_update_fib(struct zebra_vrf
*zvrf
,
1315 struct route_node
*rn
,
1316 struct route_entry
*old
,
1317 struct route_entry
*new)
1319 struct nexthop
*nexthop
= NULL
;
1321 rib_dest_t
*dest
= rib_dest_from_rnode(rn
);
1324 * We have to install or update if a new route has been selected or
1325 * something has changed.
1327 if (new != old
|| CHECK_FLAG(new->status
, ROUTE_ENTRY_CHANGED
)) {
1328 hook_call(rib_update
, rn
, "updating existing route");
1330 /* Update the nexthop; we could determine here that nexthop is
1332 if (nexthop_active_update(rn
, new, 1))
1335 /* If nexthop is active, install the selected route, if
1337 * the install succeeds, cleanup flags for prior route, if
1342 if (IS_ZEBRA_DEBUG_RIB
) {
1343 char buf
[SRCDEST2STR_BUFFER
];
1344 srcdest_rnode2str(rn
, buf
, sizeof(buf
));
1347 "%u:%s: Updating route rn %p, re %p (type %d) "
1349 zvrf_id(zvrf
), buf
, rn
, new,
1350 new->type
, old
, old
->type
);
1353 "%u:%s: Updating route rn %p, re %p (type %d)",
1354 zvrf_id(zvrf
), buf
, rn
, new,
1358 /* If labeled-unicast route, uninstall transit LSP. */
1359 if (zebra_rib_labeled_unicast(old
))
1360 zebra_mpls_lsp_uninstall(zvrf
, rn
, old
);
1362 /* Non-system route should be installed. */
1363 if (!RIB_SYSTEM_ROUTE(new)) {
1364 /* If labeled-unicast route, install transit
1366 if (zebra_rib_labeled_unicast(new))
1367 zebra_mpls_lsp_install(zvrf
, rn
, new);
1369 rib_install_kernel(rn
, new, old
);
1372 * We do not need to install the
1373 * selected route because it
1374 * is already isntalled by
1375 * the system( ie not us )
1376 * so just mark it as winning
1377 * we do need to ensure that
1378 * if we uninstall a route
1379 * from ourselves we don't
1380 * over write this pointer
1382 dest
->selected_fib
= NULL
;
1384 /* If install succeeded or system route, cleanup flags
1385 * for prior route. */
1387 if (RIB_SYSTEM_ROUTE(new)) {
1388 if (!RIB_SYSTEM_ROUTE(old
))
1389 rib_uninstall_kernel(rn
, old
);
1391 for (nexthop
= old
->ng
.nexthop
; nexthop
;
1392 nexthop
= nexthop
->next
)
1393 UNSET_FLAG(nexthop
->flags
,
1400 * If nexthop for selected route is not active or install
1402 * may need to uninstall and delete for redistribution.
1405 if (IS_ZEBRA_DEBUG_RIB
) {
1406 char buf
[SRCDEST2STR_BUFFER
];
1407 srcdest_rnode2str(rn
, buf
, sizeof(buf
));
1410 "%u:%s: Deleting route rn %p, re %p (type %d) "
1411 "old %p (type %d) - %s",
1412 zvrf_id(zvrf
), buf
, rn
, new,
1413 new->type
, old
, old
->type
,
1414 nh_active
? "install failed"
1415 : "nexthop inactive");
1418 "%u:%s: Deleting route rn %p, re %p (type %d) - %s",
1419 zvrf_id(zvrf
), buf
, rn
, new,
1421 nh_active
? "install failed"
1422 : "nexthop inactive");
1425 /* If labeled-unicast route, uninstall transit LSP. */
1426 if (zebra_rib_labeled_unicast(old
))
1427 zebra_mpls_lsp_uninstall(zvrf
, rn
, old
);
1429 if (!RIB_SYSTEM_ROUTE(old
))
1430 rib_uninstall_kernel(rn
, old
);
1432 dest
->selected_fib
= NULL
;
1436 * Same route selected; check if in the FIB and if not,
1438 * is housekeeping code to deal with race conditions in kernel
1440 * netlink reporting interface up before IPv4 or IPv6 protocol
1444 if (!RIB_SYSTEM_ROUTE(new)) {
1445 bool in_fib
= false;
1447 for (ALL_NEXTHOPS(new->ng
, nexthop
))
1448 if (CHECK_FLAG(nexthop
->flags
,
1449 NEXTHOP_FLAG_FIB
)) {
1454 rib_install_kernel(rn
, new, NULL
);
1458 /* Update prior route. */
1460 /* Set real nexthop. */
1461 nexthop_active_update(rn
, old
, 1);
1462 UNSET_FLAG(old
->status
, ROUTE_ENTRY_CHANGED
);
1465 /* Clear changed flag. */
1466 UNSET_FLAG(new->status
, ROUTE_ENTRY_CHANGED
);
1469 /* Check if 'alternate' RIB entry is better than 'current'. */
1470 static struct route_entry
*rib_choose_best(struct route_entry
*current
,
1471 struct route_entry
*alternate
)
1473 if (current
== NULL
)
1476 /* filter route selection in following order:
1477 * - connected beats other types
1478 * - lower distance beats higher
1479 * - lower metric beats higher for equal distance
1480 * - last, hence oldest, route wins tie break.
1483 /* Connected routes. Pick the last connected
1484 * route of the set of lowest metric connected routes.
1486 if (alternate
->type
== ZEBRA_ROUTE_CONNECT
) {
1487 if (current
->type
!= ZEBRA_ROUTE_CONNECT
1488 || alternate
->metric
<= current
->metric
)
1494 if (current
->type
== ZEBRA_ROUTE_CONNECT
)
1497 /* higher distance loses */
1498 if (alternate
->distance
< current
->distance
)
1500 if (current
->distance
< alternate
->distance
)
1503 /* metric tie-breaks equal distance */
1504 if (alternate
->metric
<= current
->metric
)
1510 /* Core function for processing routing information base. */
1511 static void rib_process(struct route_node
*rn
)
1513 struct route_entry
*re
;
1514 struct route_entry
*next
;
1515 struct route_entry
*old_selected
= NULL
;
1516 struct route_entry
*new_selected
= NULL
;
1517 struct route_entry
*old_fib
= NULL
;
1518 struct route_entry
*new_fib
= NULL
;
1519 struct route_entry
*best
= NULL
;
1520 char buf
[SRCDEST2STR_BUFFER
];
1522 struct zebra_vrf
*zvrf
= NULL
;
1523 struct prefix
*p
, *src_p
;
1524 srcdest_rnode_prefixes(rn
, &p
, &src_p
);
1525 vrf_id_t vrf_id
= VRF_UNKNOWN
;
1529 dest
= rib_dest_from_rnode(rn
);
1531 zvrf
= rib_dest_vrf(dest
);
1532 vrf_id
= zvrf_id(zvrf
);
1535 if (IS_ZEBRA_DEBUG_RIB
)
1536 srcdest_rnode2str(rn
, buf
, sizeof(buf
));
1538 if (IS_ZEBRA_DEBUG_RIB_DETAILED
)
1539 zlog_debug("%u:%s: Processing rn %p", vrf_id
, buf
, rn
);
1542 * we can have rn's that have a NULL info pointer
1543 * (dest). As such let's not let the deref happen
1544 * additionally we know RNODE_FOREACH_RE_SAFE
1545 * will not iterate so we are ok.
1548 old_fib
= dest
->selected_fib
;
1550 RNODE_FOREACH_RE_SAFE (rn
, re
, next
) {
1551 if (IS_ZEBRA_DEBUG_RIB_DETAILED
)
1553 "%u:%s: Examine re %p (type %d) status %x flags %x "
1554 "dist %d metric %d",
1555 vrf_id
, buf
, re
, re
->type
, re
->status
,
1556 re
->flags
, re
->distance
, re
->metric
);
1558 UNSET_FLAG(re
->status
, ROUTE_ENTRY_NEXTHOPS_CHANGED
);
1560 /* Currently selected re. */
1561 if (CHECK_FLAG(re
->flags
, ZEBRA_FLAG_SELECTED
)) {
1562 assert(old_selected
== NULL
);
1566 /* Skip deleted entries from selection */
1567 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
))
1570 /* Skip unreachable nexthop. */
1571 /* This first call to nexthop_active_update is merely to
1573 * there's any change to nexthops associated with this RIB
1575 * rib_process() can be invoked due to an external event such as
1577 * down or due to next-hop-tracking evaluation. In the latter
1579 * a decision has already been made that the NHs have changed.
1581 * need to invoke a potentially expensive call again. Further,
1583 * the change might be in a recursive NH which is not caught in
1584 * the nexthop_active_update() code. Thus, we might miss changes
1588 if (!CHECK_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
)
1589 && !nexthop_active_update(rn
, re
, 0)) {
1590 if (re
->type
== ZEBRA_ROUTE_TABLE
) {
1591 /* XXX: HERE BE DRAGONS!!!!!
1592 * In all honesty, I have not yet figured out
1594 * does or why the ROUTE_ENTRY_CHANGED test
1596 * or why we need to delete a route here, and
1598 * this concerns both selected and fib route, or
1601 /* This entry was denied by the 'ip protocol
1602 * table' route-map, we
1603 * need to delete it */
1604 if (re
!= old_selected
) {
1605 if (IS_ZEBRA_DEBUG_RIB
)
1607 "%s: %s: imported via import-table but denied "
1608 "by the ip protocol table route-map",
1612 SET_FLAG(re
->status
,
1613 ROUTE_ENTRY_REMOVED
);
1619 /* Infinite distance. */
1620 if (re
->distance
== DISTANCE_INFINITY
) {
1621 UNSET_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
);
1625 if (CHECK_FLAG(re
->flags
, ZEBRA_FLAG_FIB_OVERRIDE
)) {
1626 best
= rib_choose_best(new_fib
, re
);
1627 if (new_fib
&& best
!= new_fib
)
1628 UNSET_FLAG(new_fib
->status
,
1629 ROUTE_ENTRY_CHANGED
);
1632 best
= rib_choose_best(new_selected
, re
);
1633 if (new_selected
&& best
!= new_selected
)
1634 UNSET_FLAG(new_selected
->status
,
1635 ROUTE_ENTRY_CHANGED
);
1636 new_selected
= best
;
1639 UNSET_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
);
1640 } /* RNODE_FOREACH_RE */
1642 /* If no FIB override route, use the selected route also for FIB */
1643 if (new_fib
== NULL
)
1644 new_fib
= new_selected
;
1646 /* After the cycle is finished, the following pointers will be set:
1647 * old_selected --- RE entry currently having SELECTED
1648 * new_selected --- RE entry that is newly SELECTED
1649 * old_fib --- RE entry currently in kernel FIB
1650 * new_fib --- RE entry that is newly to be in kernel FIB
1652 * new_selected will get SELECTED flag, and is going to be redistributed
1653 * the zclients. new_fib (which can be new_selected) will be installed
1657 if (IS_ZEBRA_DEBUG_RIB_DETAILED
) {
1659 "%u:%s: After processing: old_selected %p new_selected %p old_fib %p new_fib %p",
1660 vrf_id
, buf
, (void *)old_selected
, (void *)new_selected
,
1661 (void *)old_fib
, (void *)new_fib
);
1664 /* Buffer ROUTE_ENTRY_CHANGED here, because it will get cleared if
1665 * fib == selected */
1666 bool selected_changed
= new_selected
&& CHECK_FLAG(new_selected
->status
,
1667 ROUTE_ENTRY_CHANGED
);
1669 /* Update fib according to selection results */
1670 if (new_fib
&& old_fib
)
1671 rib_process_update_fib(zvrf
, rn
, old_fib
, new_fib
);
1673 rib_process_add_fib(zvrf
, rn
, new_fib
);
1675 rib_process_del_fib(zvrf
, rn
, old_fib
);
1677 /* Redistribute SELECTED entry */
1678 if (old_selected
!= new_selected
|| selected_changed
) {
1679 struct nexthop
*nexthop
= NULL
;
1681 /* Check if we have a FIB route for the destination, otherwise,
1682 * don't redistribute it */
1684 for (ALL_NEXTHOPS(new_fib
->ng
, nexthop
)) {
1685 if (CHECK_FLAG(nexthop
->flags
,
1686 NEXTHOP_FLAG_FIB
)) {
1692 new_selected
= NULL
;
1694 if (new_selected
&& new_selected
!= new_fib
) {
1695 nexthop_active_update(rn
, new_selected
, 1);
1696 UNSET_FLAG(new_selected
->status
, ROUTE_ENTRY_CHANGED
);
1701 redistribute_delete(p
, src_p
, old_selected
);
1702 if (old_selected
!= new_selected
)
1703 UNSET_FLAG(old_selected
->flags
,
1704 ZEBRA_FLAG_SELECTED
);
1708 /* Install new or replace existing redistributed entry
1710 SET_FLAG(new_selected
->flags
, ZEBRA_FLAG_SELECTED
);
1711 redistribute_update(p
, src_p
, new_selected
,
1716 /* Remove all RE entries queued for removal */
1717 RNODE_FOREACH_RE_SAFE (rn
, re
, next
) {
1718 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
)) {
1719 if (IS_ZEBRA_DEBUG_RIB
) {
1720 rnode_debug(rn
, vrf_id
, "rn %p, removing re %p",
1721 (void *)rn
, (void *)re
);
1728 * Check if the dest can be deleted now.
1733 /* Take a list of route_node structs and return 1, if there was a record
1734 * picked from it and processed by rib_process(). Don't process more,
1735 * than one RN record; operate only in the specified sub-queue.
1737 static unsigned int process_subq(struct list
*subq
, u_char qindex
)
1739 struct listnode
*lnode
= listhead(subq
);
1740 struct route_node
*rnode
;
1742 struct zebra_vrf
*zvrf
= NULL
;
1747 rnode
= listgetdata(lnode
);
1748 dest
= rib_dest_from_rnode(rnode
);
1750 zvrf
= rib_dest_vrf(dest
);
1754 if (IS_ZEBRA_DEBUG_RIB_DETAILED
) {
1755 char buf
[SRCDEST2STR_BUFFER
];
1756 srcdest_rnode2str(rnode
, buf
, sizeof(buf
));
1757 zlog_debug("%u:%s: rn %p dequeued from sub-queue %u",
1758 zvrf
? zvrf_id(zvrf
) : 0, buf
, rnode
, qindex
);
1762 UNSET_FLAG(rib_dest_from_rnode(rnode
)->flags
,
1763 RIB_ROUTE_QUEUED(qindex
));
1768 zlog_debug ("%s: called for route_node (%p, %d) with no ribs",
1769 __func__
, rnode
, rnode
->lock
);
1770 zlog_backtrace(LOG_DEBUG
);
1773 route_unlock_node(rnode
);
1774 list_delete_node(subq
, lnode
);
1779 * All meta queues have been processed. Trigger next-hop evaluation.
1781 static void meta_queue_process_complete(struct work_queue
*dummy
)
1784 struct zebra_vrf
*zvrf
;
1786 /* Evaluate nexthops for those VRFs which underwent route processing.
1788 * should limit the evaluation to the necessary VRFs in most common
1791 RB_FOREACH (vrf
, vrf_id_head
, &vrfs_by_id
) {
1793 if (zvrf
== NULL
|| !(zvrf
->flags
& ZEBRA_VRF_RIB_SCHEDULED
))
1796 zvrf
->flags
&= ~ZEBRA_VRF_RIB_SCHEDULED
;
1797 zebra_evaluate_rnh(zvrf_id(zvrf
), AF_INET
, 0, RNH_NEXTHOP_TYPE
,
1799 zebra_evaluate_rnh(zvrf_id(zvrf
), AF_INET
, 0,
1800 RNH_IMPORT_CHECK_TYPE
, NULL
);
1801 zebra_evaluate_rnh(zvrf_id(zvrf
), AF_INET6
, 0, RNH_NEXTHOP_TYPE
,
1803 zebra_evaluate_rnh(zvrf_id(zvrf
), AF_INET6
, 0,
1804 RNH_IMPORT_CHECK_TYPE
, NULL
);
1807 /* Schedule LSPs for processing, if needed. */
1808 zvrf
= vrf_info_lookup(VRF_DEFAULT
);
1809 if (mpls_should_lsps_be_processed(zvrf
)) {
1810 if (IS_ZEBRA_DEBUG_MPLS
)
1812 "%u: Scheduling all LSPs upon RIB completion",
1814 zebra_mpls_lsp_schedule(zvrf
);
1815 mpls_unmark_lsps_for_processing(zvrf
);
1819 /* Dispatch the meta queue by picking, processing and unlocking the next RN from
1820 * a non-empty sub-queue with lowest priority. wq is equal to zebra->ribq and
1822 * is pointed to the meta queue structure.
1824 static wq_item_status
meta_queue_process(struct work_queue
*dummy
, void *data
)
1826 struct meta_queue
*mq
= data
;
1829 for (i
= 0; i
< MQ_SIZE
; i
++)
1830 if (process_subq(mq
->subq
[i
], i
)) {
1834 return mq
->size
? WQ_REQUEUE
: WQ_SUCCESS
;
1838 * Map from rib types to queue type (priority) in meta queue
1840 static const u_char meta_queue_map
[ZEBRA_ROUTE_MAX
] = {
1841 [ZEBRA_ROUTE_SYSTEM
] = 4,
1842 [ZEBRA_ROUTE_KERNEL
] = 0,
1843 [ZEBRA_ROUTE_CONNECT
] = 0,
1844 [ZEBRA_ROUTE_STATIC
] = 1,
1845 [ZEBRA_ROUTE_RIP
] = 2,
1846 [ZEBRA_ROUTE_RIPNG
] = 2,
1847 [ZEBRA_ROUTE_OSPF
] = 2,
1848 [ZEBRA_ROUTE_OSPF6
] = 2,
1849 [ZEBRA_ROUTE_ISIS
] = 2,
1850 [ZEBRA_ROUTE_BGP
] = 3,
1851 [ZEBRA_ROUTE_PIM
] = 4, // Shouldn't happen but for safety
1852 [ZEBRA_ROUTE_EIGRP
] = 2,
1853 [ZEBRA_ROUTE_NHRP
] = 2,
1854 [ZEBRA_ROUTE_HSLS
] = 4,
1855 [ZEBRA_ROUTE_OLSR
] = 4,
1856 [ZEBRA_ROUTE_TABLE
] = 1,
1857 [ZEBRA_ROUTE_LDP
] = 4,
1858 [ZEBRA_ROUTE_VNC
] = 3,
1859 [ZEBRA_ROUTE_VNC_DIRECT
] = 3,
1860 [ZEBRA_ROUTE_VNC_DIRECT_RH
] = 3,
1861 [ZEBRA_ROUTE_BGP_DIRECT
] = 3,
1862 [ZEBRA_ROUTE_BGP_DIRECT_EXT
] = 3,
1863 [ZEBRA_ROUTE_BABEL
] = 2,
1864 [ZEBRA_ROUTE_ALL
] = 4, // Shouldn't happen but for safety
1867 /* Look into the RN and queue it into one or more priority queues,
1868 * increasing the size for each data push done.
1870 static void rib_meta_queue_add(struct meta_queue
*mq
, struct route_node
*rn
)
1872 struct route_entry
*re
;
1874 RNODE_FOREACH_RE (rn
, re
) {
1875 u_char qindex
= meta_queue_map
[re
->type
];
1876 struct zebra_vrf
*zvrf
;
1878 /* Invariant: at this point we always have rn->info set. */
1879 if (CHECK_FLAG(rib_dest_from_rnode(rn
)->flags
,
1880 RIB_ROUTE_QUEUED(qindex
))) {
1881 if (IS_ZEBRA_DEBUG_RIB_DETAILED
)
1884 "rn %p is already queued in sub-queue %u",
1885 (void *)rn
, qindex
);
1889 SET_FLAG(rib_dest_from_rnode(rn
)->flags
,
1890 RIB_ROUTE_QUEUED(qindex
));
1891 listnode_add(mq
->subq
[qindex
], rn
);
1892 route_lock_node(rn
);
1895 if (IS_ZEBRA_DEBUG_RIB_DETAILED
)
1896 rnode_debug(rn
, re
->vrf_id
,
1897 "queued rn %p into sub-queue %u",
1898 (void *)rn
, qindex
);
1900 zvrf
= zebra_vrf_lookup_by_id(re
->vrf_id
);
1902 zvrf
->flags
|= ZEBRA_VRF_RIB_SCHEDULED
;
1906 /* Add route_node to work queue and schedule processing */
1907 void rib_queue_add(struct route_node
*rn
)
1911 /* Pointless to queue a route_node with no RIB entries to add or remove
1913 if (!rnode_to_ribs(rn
)) {
1914 zlog_debug("%s: called for route_node (%p, %d) with no ribs",
1915 __func__
, (void *)rn
, rn
->lock
);
1916 zlog_backtrace(LOG_DEBUG
);
1920 if (zebrad
.ribq
== NULL
) {
1921 zlog_err("%s: work_queue does not exist!", __func__
);
1926 * The RIB queue should normally be either empty or holding the only
1927 * work_queue_item element. In the latter case this element would
1928 * hold a pointer to the meta queue structure, which must be used to
1929 * actually queue the route nodes to process. So create the MQ
1930 * holder, if necessary, then push the work into it in any case.
1931 * This semantics was introduced after 0.99.9 release.
1933 if (work_queue_empty(zebrad
.ribq
))
1934 work_queue_add(zebrad
.ribq
, zebrad
.mq
);
1936 rib_meta_queue_add(zebrad
.mq
, rn
);
1941 /* Create new meta queue.
1942 A destructor function doesn't seem to be necessary here.
1944 static struct meta_queue
*meta_queue_new(void)
1946 struct meta_queue
*new;
1949 new = XCALLOC(MTYPE_WORK_QUEUE
, sizeof(struct meta_queue
));
1952 for (i
= 0; i
< MQ_SIZE
; i
++) {
1953 new->subq
[i
] = list_new();
1954 assert(new->subq
[i
]);
1960 void meta_queue_free(struct meta_queue
*mq
)
1964 for (i
= 0; i
< MQ_SIZE
; i
++)
1965 list_delete_and_null(&mq
->subq
[i
]);
1967 XFREE(MTYPE_WORK_QUEUE
, mq
);
1970 /* initialise zebra rib work queue */
1971 static void rib_queue_init(struct zebra_t
*zebra
)
1976 work_queue_new(zebra
->master
, "route_node processing"))) {
1977 zlog_err("%s: could not initialise work queue!", __func__
);
1981 /* fill in the work queue spec */
1982 zebra
->ribq
->spec
.workfunc
= &meta_queue_process
;
1983 zebra
->ribq
->spec
.errorfunc
= NULL
;
1984 zebra
->ribq
->spec
.completion_func
= &meta_queue_process_complete
;
1985 /* XXX: TODO: These should be runtime configurable via vty */
1986 zebra
->ribq
->spec
.max_retries
= 3;
1987 zebra
->ribq
->spec
.hold
= ZEBRA_RIB_PROCESS_HOLD_TIME
;
1989 if (!(zebra
->mq
= meta_queue_new())) {
1990 zlog_err("%s: could not initialise meta queue!", __func__
);
1996 /* RIB updates are processed via a queue of pointers to route_nodes.
1998 * The queue length is bounded by the maximal size of the routing table,
1999 * as a route_node will not be requeued, if already queued.
2001 * REs are submitted via rib_addnode or rib_delnode which set minimal
2002 * state, or static_install_route (when an existing RE is updated)
2003 * and then submit route_node to queue for best-path selection later.
2004 * Order of add/delete state changes are preserved for any given RE.
2006 * Deleted REs are reaped during best-path selection.
2009 * |-> rib_link or unset ROUTE_ENTRY_REMOVE |->Update kernel with
2010 * |-------->| | best RE, if required
2012 * static_install->|->rib_addqueue...... -> rib_process
2014 * |-------->| |-> rib_unlink
2015 * |-> set ROUTE_ENTRY_REMOVE |
2016 * rib_delnode (RE freed)
2018 * The 'info' pointer of a route_node points to a rib_dest_t
2019 * ('dest'). Queueing state for a route_node is kept on the dest. The
2020 * dest is created on-demand by rib_link() and is kept around at least
2021 * as long as there are ribs hanging off it (@see rib_gc_dest()).
2023 * Refcounting (aka "locking" throughout the GNU Zebra and Quagga code):
2025 * - route_nodes: refcounted by:
2026 * - dest attached to route_node:
2027 * - managed by: rib_link/rib_gc_dest
2028 * - route_node processing queue
2029 * - managed by: rib_addqueue, rib_process.
2033 /* Add RE to head of the route node. */
2034 static void rib_link(struct route_node
*rn
, struct route_entry
*re
, int process
)
2036 struct route_entry
*head
;
2039 const char *rmap_name
;
2043 dest
= rib_dest_from_rnode(rn
);
2045 if (IS_ZEBRA_DEBUG_RIB_DETAILED
)
2046 rnode_debug(rn
, re
->vrf_id
, "rn %p adding dest", rn
);
2048 dest
= XCALLOC(MTYPE_RIB_DEST
, sizeof(rib_dest_t
));
2049 route_lock_node(rn
); /* rn route table reference */
2054 head
= dest
->routes
;
2061 afi
= (rn
->p
.family
== AF_INET
)
2063 : (rn
->p
.family
== AF_INET6
) ? AFI_IP6
: AFI_MAX
;
2064 if (is_zebra_import_table_enabled(afi
, re
->table
)) {
2065 rmap_name
= zebra_get_import_table_route_map(afi
, re
->table
);
2066 zebra_add_import_table_entry(rn
, re
, rmap_name
);
2071 void rib_addnode(struct route_node
*rn
, struct route_entry
*re
, int process
)
2073 /* RE node has been un-removed before route-node is processed.
2074 * route_node must hence already be on the queue for processing..
2076 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
)) {
2077 if (IS_ZEBRA_DEBUG_RIB
)
2078 rnode_debug(rn
, re
->vrf_id
, "rn %p, un-removed re %p",
2079 (void *)rn
, (void *)re
);
2081 UNSET_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
);
2084 rib_link(rn
, re
, process
);
2090 * Detach a rib structure from a route_node.
2092 * Note that a call to rib_unlink() should be followed by a call to
2093 * rib_gc_dest() at some point. This allows a rib_dest_t that is no
2094 * longer required to be deleted.
2096 void rib_unlink(struct route_node
*rn
, struct route_entry
*re
)
2102 if (IS_ZEBRA_DEBUG_RIB
)
2103 rnode_debug(rn
, re
->vrf_id
, "rn %p, re %p", (void *)rn
,
2106 dest
= rib_dest_from_rnode(rn
);
2109 re
->next
->prev
= re
->prev
;
2112 re
->prev
->next
= re
->next
;
2114 dest
->routes
= re
->next
;
2117 if (dest
->selected_fib
== re
)
2118 dest
->selected_fib
= NULL
;
2120 /* free RE and nexthops */
2121 if (re
->type
== ZEBRA_ROUTE_STATIC
)
2122 zebra_deregister_rnh_static_nexthops(re
->vrf_id
, re
->ng
.nexthop
,
2124 nexthops_free(re
->ng
.nexthop
);
2125 XFREE(MTYPE_RE
, re
);
2128 void rib_delnode(struct route_node
*rn
, struct route_entry
*re
)
2132 if (IS_ZEBRA_DEBUG_RIB
)
2133 rnode_debug(rn
, re
->vrf_id
, "rn %p, re %p, removing",
2134 (void *)rn
, (void *)re
);
2135 SET_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
);
2137 afi
= (rn
->p
.family
== AF_INET
)
2139 : (rn
->p
.family
== AF_INET6
) ? AFI_IP6
: AFI_MAX
;
2140 if (is_zebra_import_table_enabled(afi
, re
->table
)) {
2141 zebra_del_import_table_entry(rn
, re
);
2142 /* Just clean up if non main table */
2143 if (IS_ZEBRA_DEBUG_RIB
) {
2144 char buf
[SRCDEST2STR_BUFFER
];
2145 srcdest_rnode2str(rn
, buf
, sizeof(buf
));
2147 "%u:%s: Freeing route rn %p, re %p (type %d)",
2148 re
->vrf_id
, buf
, rn
, re
, re
->type
);
2157 /* This function dumps the contents of a given RE entry into
2158 * standard debug log. Calling function name and IP prefix in
2159 * question are passed as 1st and 2nd arguments.
2162 void _route_entry_dump(const char *func
, union prefixconstptr pp
,
2163 union prefixconstptr src_pp
,
2164 const struct route_entry
*re
)
2166 const struct prefix
*p
= pp
.p
;
2167 const struct prefix
*src_p
= src_pp
.p
;
2168 bool is_srcdst
= src_p
&& src_p
->prefixlen
;
2169 char straddr
[PREFIX_STRLEN
];
2170 char srcaddr
[PREFIX_STRLEN
];
2171 struct nexthop
*nexthop
;
2173 zlog_debug("%s: dumping RE entry %p for %s%s%s vrf %u", func
,
2174 (const void *)re
, prefix2str(pp
, straddr
, sizeof(straddr
)),
2175 is_srcdst
? " from " : "",
2176 is_srcdst
? prefix2str(src_pp
, srcaddr
, sizeof(srcaddr
))
2179 zlog_debug("%s: uptime == %lu, type == %u, instance == %d, table == %d",
2180 func
, (unsigned long)re
->uptime
, re
->type
, re
->instance
,
2183 "%s: metric == %u, mtu == %u, distance == %u, flags == %u, status == %u",
2184 func
, re
->metric
, re
->mtu
, re
->distance
, re
->flags
, re
->status
);
2185 zlog_debug("%s: nexthop_num == %u, nexthop_active_num == %u", func
,
2186 re
->nexthop_num
, re
->nexthop_active_num
);
2188 for (ALL_NEXTHOPS(re
->ng
, nexthop
)) {
2189 inet_ntop(p
->family
, &nexthop
->gate
, straddr
, INET6_ADDRSTRLEN
);
2190 zlog_debug("%s: %s %s[%u] with flags %s%s%s", func
,
2191 (nexthop
->rparent
? " NH" : "NH"), straddr
,
2193 (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
)
2196 (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
)
2199 (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_RECURSIVE
)
2203 zlog_debug("%s: dump complete", func
);
2206 /* This is an exported helper to rtm_read() to dump the strange
2207 * RE entry found by rib_lookup_ipv4_route()
2210 void rib_lookup_and_dump(struct prefix_ipv4
*p
, vrf_id_t vrf_id
)
2212 struct route_table
*table
;
2213 struct route_node
*rn
;
2214 struct route_entry
*re
;
2215 char prefix_buf
[INET_ADDRSTRLEN
];
2218 table
= zebra_vrf_table(AFI_IP
, SAFI_UNICAST
, vrf_id
);
2220 zlog_err("%s: zebra_vrf_table() returned NULL", __func__
);
2224 /* Scan the RIB table for exactly matching RE entry. */
2225 rn
= route_node_lookup(table
, (struct prefix
*)p
);
2227 /* No route for this prefix. */
2229 zlog_debug("%s: lookup failed for %s", __func__
,
2230 prefix2str((struct prefix
*)p
, prefix_buf
,
2231 sizeof(prefix_buf
)));
2236 route_unlock_node(rn
);
2239 RNODE_FOREACH_RE (rn
, re
) {
2240 zlog_debug("%s: rn %p, re %p: %s, %s", __func__
, (void *)rn
,
2242 (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
)
2245 (CHECK_FLAG(re
->flags
, ZEBRA_FLAG_SELECTED
)
2248 route_entry_dump(p
, NULL
, re
);
2252 /* Check if requested address assignment will fail due to another
2253 * route being installed by zebra in FIB already. Take necessary
2254 * actions, if needed: remove such a route from FIB and deSELECT
2255 * corresponding RE entry. Then put affected RN into RIBQ head.
2257 void rib_lookup_and_pushup(struct prefix_ipv4
*p
, vrf_id_t vrf_id
)
2259 struct route_table
*table
;
2260 struct route_node
*rn
;
2261 unsigned changed
= 0;
2264 if (NULL
== (table
= zebra_vrf_table(AFI_IP
, SAFI_UNICAST
, vrf_id
))) {
2265 zlog_err("%s: zebra_vrf_table() returned NULL", __func__
);
2269 /* No matches would be the simplest case. */
2270 if (NULL
== (rn
= route_node_lookup(table
, (struct prefix
*)p
)))
2274 route_unlock_node(rn
);
2276 dest
= rib_dest_from_rnode(rn
);
2277 /* Check all RE entries. In case any changes have to be done, requeue
2278 * the RN into RIBQ head. If the routing message about the new connected
2279 * route (generated by the IP address we are going to assign very soon)
2280 * comes before the RIBQ is processed, the new RE entry will join
2281 * RIBQ record already on head. This is necessary for proper
2283 * of the rest of the RE.
2285 if (dest
->selected_fib
&& !RIB_SYSTEM_ROUTE(dest
->selected_fib
)) {
2287 if (IS_ZEBRA_DEBUG_RIB
) {
2288 char buf
[PREFIX_STRLEN
];
2290 zlog_debug("%u:%s: freeing way for connected prefix",
2291 dest
->selected_fib
->vrf_id
,
2292 prefix2str(&rn
->p
, buf
, sizeof(buf
)));
2293 route_entry_dump(&rn
->p
, NULL
, dest
->selected_fib
);
2295 rib_uninstall(rn
, dest
->selected_fib
);
2301 int rib_add_multipath(afi_t afi
, safi_t safi
, struct prefix
*p
,
2302 struct prefix_ipv6
*src_p
, struct route_entry
*re
)
2304 struct route_table
*table
;
2305 struct route_node
*rn
;
2306 struct route_entry
*same
;
2307 struct nexthop
*nexthop
;
2313 assert(!src_p
|| afi
== AFI_IP6
);
2316 table
= zebra_vrf_table_with_table_id(afi
, safi
, re
->vrf_id
, re
->table
);
2318 XFREE(MTYPE_RE
, re
);
2322 /* Make it sure prefixlen is applied to the prefix. */
2325 apply_mask_ipv6(src_p
);
2327 /* Set default distance by route type. */
2328 if (re
->distance
== 0) {
2329 re
->distance
= route_distance(re
->type
);
2331 /* iBGP distance is 200. */
2332 if (re
->type
== ZEBRA_ROUTE_BGP
2333 && CHECK_FLAG(re
->flags
, ZEBRA_FLAG_IBGP
))
2337 /* Lookup route node.*/
2338 rn
= srcdest_rnode_get(table
, p
, src_p
);
2340 /* If same type of route are installed, treat it as a implicit
2342 RNODE_FOREACH_RE (rn
, same
) {
2343 if (CHECK_FLAG(same
->status
, ROUTE_ENTRY_REMOVED
))
2346 if (same
->type
!= re
->type
)
2348 if (same
->instance
!= re
->instance
)
2350 if (same
->type
== ZEBRA_ROUTE_KERNEL
2351 && same
->metric
!= re
->metric
)
2354 * We should allow duplicate connected routes because of
2355 * IPv6 link-local routes and unnumbered interfaces on Linux.
2357 if (same
->type
!= ZEBRA_ROUTE_CONNECT
)
2361 /* If this route is kernel route, set FIB flag to the route. */
2362 if (RIB_SYSTEM_ROUTE(re
))
2363 for (nexthop
= re
->ng
.nexthop
; nexthop
; nexthop
= nexthop
->next
)
2364 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
2366 /* Link new re to node.*/
2367 if (IS_ZEBRA_DEBUG_RIB
) {
2370 "Inserting route rn %p, re %p (type %d) existing %p",
2371 (void *)rn
, (void *)re
, re
->type
, (void *)same
);
2373 if (IS_ZEBRA_DEBUG_RIB_DETAILED
)
2374 route_entry_dump(p
, src_p
, re
);
2376 rib_addnode(rn
, re
, 1);
2379 /* Free implicit route.*/
2381 rib_delnode(rn
, same
);
2385 route_unlock_node(rn
);
2389 void rib_delete(afi_t afi
, safi_t safi
, vrf_id_t vrf_id
, int type
,
2390 u_short instance
, int flags
, struct prefix
*p
,
2391 struct prefix_ipv6
*src_p
, const struct nexthop
*nh
,
2392 u_int32_t table_id
, u_int32_t metric
, bool fromkernel
,
2393 struct ethaddr
*rmac
)
2395 struct route_table
*table
;
2396 struct route_node
*rn
;
2397 struct route_entry
*re
;
2398 struct route_entry
*fib
= NULL
;
2399 struct route_entry
*same
= NULL
;
2400 struct nexthop
*rtnh
;
2401 char buf2
[INET6_ADDRSTRLEN
];
2404 assert(!src_p
|| afi
== AFI_IP6
);
2407 table
= zebra_vrf_table_with_table_id(afi
, safi
, vrf_id
, table_id
);
2414 apply_mask_ipv6(src_p
);
2416 /* Lookup route node. */
2417 rn
= srcdest_rnode_lookup(table
, p
, src_p
);
2419 char dst_buf
[PREFIX_STRLEN
], src_buf
[PREFIX_STRLEN
];
2421 prefix2str(p
, dst_buf
, sizeof(dst_buf
));
2422 if (src_p
&& src_p
->prefixlen
)
2423 prefix2str(src_p
, src_buf
, sizeof(src_buf
));
2427 if (IS_ZEBRA_DEBUG_RIB
)
2428 zlog_debug("%u:%s%s%s doesn't exist in rib", vrf_id
,
2430 (src_buf
[0] != '\0') ? " from " : "",
2435 dest
= rib_dest_from_rnode(rn
);
2436 fib
= dest
->selected_fib
;
2438 /* Lookup same type route. */
2439 RNODE_FOREACH_RE (rn
, re
) {
2440 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
))
2443 if (re
->type
!= type
)
2445 if (re
->instance
!= instance
)
2447 if (re
->type
== ZEBRA_ROUTE_KERNEL
&& re
->metric
!= metric
)
2449 if (re
->type
== ZEBRA_ROUTE_CONNECT
&& (rtnh
= re
->ng
.nexthop
)
2450 && rtnh
->type
== NEXTHOP_TYPE_IFINDEX
&& nh
) {
2451 if (rtnh
->ifindex
!= nh
->ifindex
)
2456 /* Make sure that the route found has the same gateway. */
2462 for (ALL_NEXTHOPS(re
->ng
, rtnh
))
2463 if (nexthop_same_no_recurse(rtnh
, nh
)) {
2471 /* If same type of route can't be found and this message is from
2475 * In the past(HA!) we could get here because
2476 * we were receiving a route delete from the
2477 * kernel and we're not marking the proto
2478 * as coming from it's appropriate originator.
2479 * Now that we are properly noticing the fact
2480 * that the kernel has deleted our route we
2481 * are not going to get called in this path
2482 * I am going to leave this here because
2483 * this might still work this way on non-linux
2484 * platforms as well as some weird state I have
2485 * not properly thought of yet.
2486 * If we can show that this code path is
2487 * dead then we can remove it.
2489 if (fib
&& type
== ZEBRA_ROUTE_KERNEL
2490 && CHECK_FLAG(flags
, ZEBRA_FLAG_SELFROUTE
)) {
2491 if (IS_ZEBRA_DEBUG_RIB
) {
2494 "rn %p, re %p (type %d) was deleted from kernel, adding",
2495 rn
, fib
, fib
->type
);
2499 for (rtnh
= fib
->ng
.nexthop
; rtnh
;
2501 UNSET_FLAG(rtnh
->flags
,
2505 * This is a non FRR route
2506 * as such we should mark
2509 dest
->selected_fib
= NULL
;
2511 /* This means someone else, other than Zebra,
2513 * a Zebra router from the kernel. We will add
2515 rib_install_kernel(rn
, fib
, NULL
);
2518 if (IS_ZEBRA_DEBUG_RIB
) {
2522 "via %s ifindex %d type %d "
2523 "doesn't exist in rib",
2527 INET_ADDRSTRLEN
), /* FIXME
2533 "type %d doesn't exist in rib",
2536 route_unlock_node(rn
);
2542 if (fromkernel
&& CHECK_FLAG(flags
, ZEBRA_FLAG_SELFROUTE
)
2544 rib_install_kernel(rn
, same
, NULL
);
2545 route_unlock_node(rn
);
2550 if (CHECK_FLAG(flags
, ZEBRA_FLAG_EVPN_ROUTE
)) {
2551 struct nexthop
*tmp_nh
;
2553 for (ALL_NEXTHOPS(re
->ng
, tmp_nh
)) {
2554 struct ipaddr vtep_ip
;
2556 memset(&vtep_ip
, 0, sizeof(struct ipaddr
));
2557 vtep_ip
.ipa_type
= IPADDR_V4
;
2558 memcpy(&(vtep_ip
.ipaddr_v4
),
2559 &(tmp_nh
->gate
.ipv4
),
2560 sizeof(struct in_addr
));
2561 zebra_vxlan_evpn_vrf_route_del(re
->vrf_id
, rmac
,
2565 rib_delnode(rn
, same
);
2568 route_unlock_node(rn
);
2573 int rib_add(afi_t afi
, safi_t safi
, vrf_id_t vrf_id
, int type
, u_short instance
,
2574 int flags
, struct prefix
*p
, struct prefix_ipv6
*src_p
,
2575 const struct nexthop
*nh
, u_int32_t table_id
, u_int32_t metric
,
2576 u_int32_t mtu
, uint8_t distance
, route_tag_t tag
)
2578 struct route_entry
*re
;
2579 struct nexthop
*nexthop
;
2581 /* Allocate new route_entry structure. */
2582 re
= XCALLOC(MTYPE_RE
, sizeof(struct route_entry
));
2584 re
->instance
= instance
;
2585 re
->distance
= distance
;
2587 re
->metric
= metric
;
2589 re
->table
= table_id
;
2590 re
->vrf_id
= vrf_id
;
2591 re
->nexthop_num
= 0;
2592 re
->uptime
= time(NULL
);
2596 nexthop
= nexthop_new();
2598 route_entry_nexthop_add(re
, nexthop
);
2600 return rib_add_multipath(afi
, safi
, p
, src_p
, re
);
2603 /* Schedule routes of a particular table (address-family) based on event. */
2604 static void rib_update_table(struct route_table
*table
,
2605 rib_update_event_t event
)
2607 struct route_node
*rn
;
2608 struct route_entry
*re
, *next
;
2610 /* Walk all routes and queue for processing, if appropriate for
2611 * the trigger event.
2613 for (rn
= route_top(table
); rn
; rn
= srcdest_route_next(rn
)) {
2615 * If we are looking at a route node and the node
2616 * has already been queued we don't
2617 * need to queue it up again
2619 if (rn
->info
&& CHECK_FLAG(rib_dest_from_rnode(rn
)->flags
,
2620 RIB_ROUTE_ANY_QUEUED
))
2623 case RIB_UPDATE_IF_CHANGE
:
2624 /* Examine all routes that won't get processed by the
2626 * triggered by nexthop evaluation (NHT). This would be
2628 * kernel and certain static routes. Note that NHT will
2630 * triggered upon an interface event as connected routes
2632 * get queued for processing.
2634 RNODE_FOREACH_RE_SAFE (rn
, re
, next
) {
2637 if (re
->type
!= ZEBRA_ROUTE_SYSTEM
2638 && re
->type
!= ZEBRA_ROUTE_KERNEL
2639 && re
->type
!= ZEBRA_ROUTE_CONNECT
2640 && re
->type
!= ZEBRA_ROUTE_STATIC
)
2643 if (re
->type
!= ZEBRA_ROUTE_STATIC
) {
2648 for (nh
= re
->ng
.nexthop
; nh
; nh
= nh
->next
)
2649 if (!(nh
->type
== NEXTHOP_TYPE_IPV4
2650 || nh
->type
== NEXTHOP_TYPE_IPV6
))
2653 /* If we only have nexthops to a
2662 case RIB_UPDATE_RMAP_CHANGE
:
2663 case RIB_UPDATE_OTHER
:
2664 /* Right now, examine all routes. Can restrict to a
2666 * some cases (TODO).
2668 if (rnode_to_ribs(rn
))
2678 /* RIB update function. */
2679 void rib_update(vrf_id_t vrf_id
, rib_update_event_t event
)
2681 struct route_table
*table
;
2683 /* Process routes of interested address-families. */
2684 table
= zebra_vrf_table(AFI_IP
, SAFI_UNICAST
, vrf_id
);
2686 rib_update_table(table
, event
);
2688 table
= zebra_vrf_table(AFI_IP6
, SAFI_UNICAST
, vrf_id
);
2690 rib_update_table(table
, event
);
2693 /* Remove all routes which comes from non main table. */
2694 static void rib_weed_table(struct route_table
*table
)
2696 struct route_node
*rn
;
2697 struct route_entry
*re
;
2698 struct route_entry
*next
;
2701 for (rn
= route_top(table
); rn
; rn
= srcdest_route_next(rn
))
2702 RNODE_FOREACH_RE_SAFE (rn
, re
, next
) {
2703 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
))
2706 if (re
->table
!= zebrad
.rtm_table_default
2707 && re
->table
!= RT_TABLE_MAIN
)
2708 rib_delnode(rn
, re
);
2712 /* Delete all routes from non main table. */
2713 void rib_weed_tables(void)
2716 struct zebra_vrf
*zvrf
;
2718 RB_FOREACH (vrf
, vrf_id_head
, &vrfs_by_id
)
2719 if ((zvrf
= vrf
->info
) != NULL
) {
2720 rib_weed_table(zvrf
->table
[AFI_IP
][SAFI_UNICAST
]);
2721 rib_weed_table(zvrf
->table
[AFI_IP6
][SAFI_UNICAST
]);
2725 /* Delete self installed routes after zebra is relaunched. */
2726 static void rib_sweep_table(struct route_table
*table
)
2728 struct route_node
*rn
;
2729 struct route_entry
*re
;
2730 struct route_entry
*next
;
2731 struct nexthop
*nexthop
;
2736 for (rn
= route_top(table
); rn
; rn
= srcdest_route_next(rn
)) {
2737 RNODE_FOREACH_RE_SAFE (rn
, re
, next
) {
2738 if (IS_ZEBRA_DEBUG_RIB
)
2739 route_entry_dump(&rn
->p
, NULL
, re
);
2741 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
))
2744 if (!CHECK_FLAG(re
->flags
, ZEBRA_FLAG_SELFROUTE
))
2748 * So we are starting up and have received
2749 * routes from the kernel that we have installed
2750 * from a previous run of zebra but not cleaned
2751 * up ( say a kill -9 )
2752 * But since we haven't actually installed
2753 * them yet( we received them from the kernel )
2754 * we don't think they are active.
2755 * So let's pretend they are active to actually
2757 * In all honesty I'm not sure if we should
2758 * mark them as active when we receive them
2759 * This is startup only so probably ok.
2761 * If we ever decide to move rib_sweep_table
2762 * to a different spot (ie startup )
2763 * this decision needs to be revisited
2765 for (ALL_NEXTHOPS(re
->ng
, nexthop
))
2766 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
2768 rib_uninstall_kernel(rn
, re
);
2769 rib_delnode(rn
, re
);
2774 /* Sweep all RIB tables. */
2775 void rib_sweep_route(void)
2778 struct zebra_vrf
*zvrf
;
2780 RB_FOREACH (vrf
, vrf_id_head
, &vrfs_by_id
) {
2781 if ((zvrf
= vrf
->info
) == NULL
)
2784 rib_sweep_table(zvrf
->table
[AFI_IP
][SAFI_UNICAST
]);
2785 rib_sweep_table(zvrf
->table
[AFI_IP6
][SAFI_UNICAST
]);
2789 /* Remove specific by protocol routes from 'table'. */
2790 static unsigned long rib_score_proto_table(u_char proto
, u_short instance
,
2791 struct route_table
*table
)
2793 struct route_node
*rn
;
2794 struct route_entry
*re
;
2795 struct route_entry
*next
;
2796 unsigned long n
= 0;
2799 for (rn
= route_top(table
); rn
; rn
= srcdest_route_next(rn
))
2800 RNODE_FOREACH_RE_SAFE (rn
, re
, next
) {
2801 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
))
2803 if (re
->type
== proto
2804 && re
->instance
== instance
) {
2805 rib_delnode(rn
, re
);
2812 /* Remove specific by protocol routes. */
2813 unsigned long rib_score_proto(u_char proto
, u_short instance
)
2816 struct zebra_vrf
*zvrf
;
2817 unsigned long cnt
= 0;
2819 RB_FOREACH (vrf
, vrf_id_head
, &vrfs_by_id
)
2820 if ((zvrf
= vrf
->info
) != NULL
)
2821 cnt
+= rib_score_proto_table(
2823 zvrf
->table
[AFI_IP
][SAFI_UNICAST
])
2824 + rib_score_proto_table(
2826 zvrf
->table
[AFI_IP6
][SAFI_UNICAST
]);
2831 /* Close RIB and clean up kernel routes. */
2832 void rib_close_table(struct route_table
*table
)
2834 struct route_node
*rn
;
2835 rib_table_info_t
*info
;
2843 for (rn
= route_top(table
); rn
; rn
= srcdest_route_next(rn
)) {
2844 dest
= rib_dest_from_rnode(rn
);
2846 if (dest
&& dest
->selected_fib
) {
2847 if (info
->safi
== SAFI_UNICAST
)
2848 hook_call(rib_update
, rn
, NULL
);
2850 if (!RIB_SYSTEM_ROUTE(dest
->selected_fib
))
2851 rib_uninstall_kernel(rn
, dest
->selected_fib
);
2856 /* Routing information base initialize. */
2859 rib_queue_init(&zebrad
);
2865 * Get the first vrf id that is greater than the given vrf id if any.
2867 * Returns TRUE if a vrf id was found, FALSE otherwise.
2869 static inline int vrf_id_get_next(vrf_id_t vrf_id
, vrf_id_t
*next_id_p
)
2873 vrf
= vrf_lookup_by_id(vrf_id
);
2875 vrf
= RB_NEXT(vrf_id_head
, vrf
);
2877 *next_id_p
= vrf
->vrf_id
;
2886 * rib_tables_iter_next
2888 * Returns the next table in the iteration.
2890 struct route_table
*rib_tables_iter_next(rib_tables_iter_t
*iter
)
2892 struct route_table
*table
;
2895 * Array that helps us go over all AFI/SAFI combinations via one
2902 {AFI_IP
, SAFI_UNICAST
}, {AFI_IP
, SAFI_MULTICAST
},
2903 {AFI_IP
, SAFI_LABELED_UNICAST
}, {AFI_IP6
, SAFI_UNICAST
},
2904 {AFI_IP6
, SAFI_MULTICAST
}, {AFI_IP6
, SAFI_LABELED_UNICAST
},
2909 switch (iter
->state
) {
2911 case RIB_TABLES_ITER_S_INIT
:
2912 iter
->vrf_id
= VRF_DEFAULT
;
2913 iter
->afi_safi_ix
= -1;
2917 case RIB_TABLES_ITER_S_ITERATING
:
2918 iter
->afi_safi_ix
++;
2921 while (iter
->afi_safi_ix
2922 < (int)ZEBRA_NUM_OF(afi_safis
)) {
2923 table
= zebra_vrf_table(
2924 afi_safis
[iter
->afi_safi_ix
].afi
,
2925 afi_safis
[iter
->afi_safi_ix
].safi
,
2930 iter
->afi_safi_ix
++;
2934 * Found another table in this vrf.
2940 * Done with all tables in the current vrf, go to the
2944 if (!vrf_id_get_next(iter
->vrf_id
, &iter
->vrf_id
))
2947 iter
->afi_safi_ix
= 0;
2952 case RIB_TABLES_ITER_S_DONE
:
2957 iter
->state
= RIB_TABLES_ITER_S_ITERATING
;
2959 iter
->state
= RIB_TABLES_ITER_S_DONE
;