1 /* Redistribution Handler
2 * Copyright (C) 1998 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
33 #include "srcdest_table.h"
35 #include "zebra/rib.h"
36 #include "zebra/zserv.h"
37 #include "zebra/zebra_ns.h"
38 #include "zebra/zebra_vrf.h"
39 #include "zebra/zebra_routemap.h"
40 #include "zebra/redistribute.h"
41 #include "zebra/debug.h"
42 #include "zebra/router-id.h"
43 #include "zebra/zebra_memory.h"
44 #include "zebra/zebra_vxlan.h"
46 #define ZEBRA_PTM_SUPPORT
48 /* array holding redistribute info about table redistribution */
49 /* bit AFI is set if that AFI is redistributing routes from this table */
50 static int zebra_import_table_used
[AFI_MAX
][ZEBRA_KERNEL_TABLE_MAX
];
51 static u_int32_t zebra_import_table_distance
[AFI_MAX
][ZEBRA_KERNEL_TABLE_MAX
];
53 int is_zebra_import_table_enabled(afi_t afi
, u_int32_t table_id
)
56 * Make sure that what we are called with actualy makes sense
61 if (is_zebra_valid_kernel_table(table_id
))
62 return zebra_import_table_used
[afi
][table_id
];
66 static void zebra_redistribute_default(struct zserv
*client
, vrf_id_t vrf_id
)
70 struct route_table
*table
;
71 struct route_node
*rn
;
72 struct route_entry
*newre
;
74 for (afi
= AFI_IP
; afi
<= AFI_IP6
; afi
++) {
76 table
= zebra_vrf_table(afi
, SAFI_UNICAST
, vrf_id
);
80 /* Lookup default route. */
81 memset(&p
, 0, sizeof(p
));
82 p
.family
= afi2family(afi
);
83 rn
= route_node_lookup(table
, &p
);
87 RNODE_FOREACH_RE (rn
, newre
) {
88 if (CHECK_FLAG(newre
->flags
, ZEBRA_FLAG_SELECTED
)
89 && newre
->distance
!= DISTANCE_INFINITY
)
90 zsend_redistribute_route(
91 ZEBRA_REDISTRIBUTE_ROUTE_ADD
, client
,
95 route_unlock_node(rn
);
99 /* Redistribute routes. */
100 static void zebra_redistribute(struct zserv
*client
, int type
, u_short instance
,
101 vrf_id_t vrf_id
, int afi
)
103 struct route_entry
*newre
;
104 struct route_table
*table
;
105 struct route_node
*rn
;
107 table
= zebra_vrf_table(afi
, SAFI_UNICAST
, vrf_id
);
111 for (rn
= route_top(table
); rn
; rn
= srcdest_route_next(rn
))
112 RNODE_FOREACH_RE (rn
, newre
) {
113 struct prefix
*dst_p
, *src_p
;
114 srcdest_rnode_prefixes(rn
, &dst_p
, &src_p
);
116 if (IS_ZEBRA_DEBUG_EVENT
)
118 "%s: checking: selected=%d, type=%d, distance=%d, "
119 "zebra_check_addr=%d",
121 CHECK_FLAG(newre
->flags
,
122 ZEBRA_FLAG_SELECTED
),
123 newre
->type
, newre
->distance
,
124 zebra_check_addr(dst_p
));
126 if (!CHECK_FLAG(newre
->flags
, ZEBRA_FLAG_SELECTED
))
128 if ((type
!= ZEBRA_ROUTE_ALL
129 && (newre
->type
!= type
130 || newre
->instance
!= instance
)))
132 if (newre
->distance
== DISTANCE_INFINITY
)
134 if (!zebra_check_addr(dst_p
))
137 zsend_redistribute_route(ZEBRA_REDISTRIBUTE_ROUTE_ADD
,
138 client
, dst_p
, src_p
, newre
);
142 /* Either advertise a route for redistribution to registered clients or */
143 /* withdraw redistribution if add cannot be done for client */
144 void redistribute_update(struct prefix
*p
, struct prefix
*src_p
,
145 struct route_entry
*re
, struct route_entry
*prev_re
)
147 struct listnode
*node
, *nnode
;
148 struct zserv
*client
;
149 int send_redistribute
;
151 char buf
[INET6_ADDRSTRLEN
];
153 if (IS_ZEBRA_DEBUG_RIB
) {
154 inet_ntop(p
->family
, &p
->u
.prefix
, buf
, INET6_ADDRSTRLEN
);
156 "%u:%s/%d: Redist update re %p (type %d), old %p (type %d)",
157 re
->vrf_id
, buf
, p
->prefixlen
, re
, re
->type
, prev_re
,
158 prev_re
? prev_re
->type
: -1);
161 afi
= family2afi(p
->family
);
163 zlog_warn("%s: Unknown AFI/SAFI prefix received\n",
168 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, node
, nnode
, client
)) {
169 send_redistribute
= 0;
171 if (is_default_prefix(p
)
172 && vrf_bitmap_check(client
->redist_default
, re
->vrf_id
))
173 send_redistribute
= 1;
174 else if (vrf_bitmap_check(client
->redist
[afi
][ZEBRA_ROUTE_ALL
],
176 send_redistribute
= 1;
177 else if (re
->instance
178 && redist_check_instance(
179 &client
->mi_redist
[afi
][re
->type
],
181 send_redistribute
= 1;
182 else if (vrf_bitmap_check(client
->redist
[afi
][re
->type
],
184 send_redistribute
= 1;
186 if (send_redistribute
) {
187 zsend_redistribute_route(ZEBRA_REDISTRIBUTE_ROUTE_ADD
,
188 client
, p
, src_p
, re
);
191 && redist_check_instance(
192 &client
->mi_redist
[afi
]
196 client
->redist
[afi
][prev_re
->type
],
198 zsend_redistribute_route(ZEBRA_REDISTRIBUTE_ROUTE_DEL
,
199 client
, p
, src_p
, prev_re
);
204 void redistribute_delete(struct prefix
*p
, struct prefix
*src_p
,
205 struct route_entry
*re
)
207 struct listnode
*node
, *nnode
;
208 struct zserv
*client
;
209 char buf
[INET6_ADDRSTRLEN
];
212 if (IS_ZEBRA_DEBUG_RIB
) {
213 inet_ntop(p
->family
, &p
->u
.prefix
, buf
, INET6_ADDRSTRLEN
);
214 zlog_debug("%u:%s/%d: Redist delete re %p (type %d)",
215 re
->vrf_id
, buf
, p
->prefixlen
, re
, re
->type
);
218 /* Add DISTANCE_INFINITY check. */
219 if (re
->distance
== DISTANCE_INFINITY
)
222 afi
= family2afi(p
->family
);
224 zlog_warn("%s: Unknown AFI/SAFI prefix received\n",
229 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, node
, nnode
, client
)) {
230 if ((is_default_prefix(p
)
231 && vrf_bitmap_check(client
->redist_default
, re
->vrf_id
))
232 || vrf_bitmap_check(client
->redist
[afi
][ZEBRA_ROUTE_ALL
],
235 && redist_check_instance(
236 &client
->mi_redist
[afi
][re
->type
],
238 || vrf_bitmap_check(client
->redist
[afi
][re
->type
],
240 zsend_redistribute_route(ZEBRA_REDISTRIBUTE_ROUTE_DEL
,
241 client
, p
, src_p
, re
);
246 void zebra_redistribute_add(int command
, struct zserv
*client
, int length
,
247 struct zebra_vrf
*zvrf
)
253 afi
= stream_getc(client
->ibuf
);
254 type
= stream_getc(client
->ibuf
);
255 instance
= stream_getw(client
->ibuf
);
257 if (type
== 0 || type
>= ZEBRA_ROUTE_MAX
)
261 if (!redist_check_instance(&client
->mi_redist
[afi
][type
],
263 redist_add_instance(&client
->mi_redist
[afi
][type
],
265 zebra_redistribute(client
, type
, instance
,
269 if (!vrf_bitmap_check(client
->redist
[afi
][type
],
271 vrf_bitmap_set(client
->redist
[afi
][type
],
273 zebra_redistribute(client
, type
, 0, zvrf_id(zvrf
), afi
);
278 void zebra_redistribute_delete(int command
, struct zserv
*client
, int length
,
279 struct zebra_vrf
*zvrf
)
285 afi
= stream_getc(client
->ibuf
);
286 type
= stream_getc(client
->ibuf
);
287 instance
= stream_getw(client
->ibuf
);
289 if (type
== 0 || type
>= ZEBRA_ROUTE_MAX
)
293 * NOTE: no need to withdraw the previously advertised routes. The
295 * themselves should keep track of the received routes from zebra and
296 * withdraw them when necessary.
299 redist_del_instance(&client
->mi_redist
[afi
][type
], instance
);
301 vrf_bitmap_unset(client
->redist
[afi
][type
], zvrf_id(zvrf
));
304 void zebra_redistribute_default_add(int command
, struct zserv
*client
,
305 int length
, struct zebra_vrf
*zvrf
)
307 vrf_bitmap_set(client
->redist_default
, zvrf_id(zvrf
));
308 zebra_redistribute_default(client
, zvrf_id(zvrf
));
311 void zebra_redistribute_default_delete(int command
, struct zserv
*client
,
312 int length
, struct zebra_vrf
*zvrf
)
314 vrf_bitmap_unset(client
->redist_default
, zvrf_id(zvrf
));
317 /* Interface up information. */
318 void zebra_interface_up_update(struct interface
*ifp
)
320 struct listnode
*node
, *nnode
;
321 struct zserv
*client
;
323 if (IS_ZEBRA_DEBUG_EVENT
)
324 zlog_debug("MESSAGE: ZEBRA_INTERFACE_UP %s", ifp
->name
);
326 if (ifp
->ptm_status
|| !ifp
->ptm_enable
) {
327 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, node
, nnode
, client
))
328 if (client
->ifinfo
) {
329 zsend_interface_update(ZEBRA_INTERFACE_UP
,
331 zsend_interface_link_params(client
, ifp
);
336 /* Interface down information. */
337 void zebra_interface_down_update(struct interface
*ifp
)
339 struct listnode
*node
, *nnode
;
340 struct zserv
*client
;
342 if (IS_ZEBRA_DEBUG_EVENT
)
343 zlog_debug("MESSAGE: ZEBRA_INTERFACE_DOWN %s", ifp
->name
);
345 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, node
, nnode
, client
)) {
346 zsend_interface_update(ZEBRA_INTERFACE_DOWN
, client
, ifp
);
350 /* Interface information update. */
351 void zebra_interface_add_update(struct interface
*ifp
)
353 struct listnode
*node
, *nnode
;
354 struct zserv
*client
;
356 if (IS_ZEBRA_DEBUG_EVENT
)
357 zlog_debug("MESSAGE: ZEBRA_INTERFACE_ADD %s[%d]", ifp
->name
,
360 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, node
, nnode
, client
))
361 if (client
->ifinfo
) {
363 zsend_interface_add(client
, ifp
);
364 zsend_interface_link_params(client
, ifp
);
368 void zebra_interface_delete_update(struct interface
*ifp
)
370 struct listnode
*node
, *nnode
;
371 struct zserv
*client
;
373 if (IS_ZEBRA_DEBUG_EVENT
)
374 zlog_debug("MESSAGE: ZEBRA_INTERFACE_DELETE %s", ifp
->name
);
376 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, node
, nnode
, client
)) {
378 zsend_interface_delete(client
, ifp
);
382 /* Interface address addition. */
383 void zebra_interface_address_add_update(struct interface
*ifp
,
384 struct connected
*ifc
)
386 struct listnode
*node
, *nnode
;
387 struct zserv
*client
;
390 if (IS_ZEBRA_DEBUG_EVENT
) {
391 char buf
[PREFIX_STRLEN
];
394 zlog_debug("MESSAGE: ZEBRA_INTERFACE_ADDRESS_ADD %s on %s",
395 prefix2str(p
, buf
, sizeof(buf
)), ifc
->ifp
->name
);
398 if (!CHECK_FLAG(ifc
->conf
, ZEBRA_IFC_REAL
))
400 "WARNING: advertising address to clients that is not yet usable.");
402 zebra_vxlan_add_del_gw_macip(ifp
, ifc
->address
, 1);
404 router_id_add_address(ifc
);
406 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, node
, nnode
, client
))
407 if (CHECK_FLAG(ifc
->conf
, ZEBRA_IFC_REAL
)) {
408 client
->connected_rt_add_cnt
++;
409 zsend_interface_address(ZEBRA_INTERFACE_ADDRESS_ADD
,
414 /* Interface address deletion. */
415 void zebra_interface_address_delete_update(struct interface
*ifp
,
416 struct connected
*ifc
)
418 struct listnode
*node
, *nnode
;
419 struct zserv
*client
;
422 if (IS_ZEBRA_DEBUG_EVENT
) {
423 char buf
[PREFIX_STRLEN
];
426 zlog_debug("MESSAGE: ZEBRA_INTERFACE_ADDRESS_DELETE %s on %s",
427 prefix2str(p
, buf
, sizeof(buf
)), ifc
->ifp
->name
);
430 zebra_vxlan_add_del_gw_macip(ifp
, ifc
->address
, 0);
432 router_id_del_address(ifc
);
434 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, node
, nnode
, client
))
435 if (CHECK_FLAG(ifc
->conf
, ZEBRA_IFC_REAL
)) {
436 client
->connected_rt_del_cnt
++;
437 zsend_interface_address(ZEBRA_INTERFACE_ADDRESS_DELETE
,
442 /* Interface VRF change. May need to delete from clients not interested in
443 * the new VRF. Note that this function is invoked *prior* to the VRF change.
445 void zebra_interface_vrf_update_del(struct interface
*ifp
, vrf_id_t new_vrf_id
)
447 struct listnode
*node
, *nnode
;
448 struct zserv
*client
;
450 if (IS_ZEBRA_DEBUG_EVENT
)
452 "MESSAGE: ZEBRA_INTERFACE_VRF_UPDATE/DEL %s VRF Id %u -> %u",
453 ifp
->name
, ifp
->vrf_id
, new_vrf_id
);
455 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, node
, nnode
, client
)) {
456 /* Need to delete if the client is not interested in the new
458 zsend_interface_update(ZEBRA_INTERFACE_DOWN
, client
, ifp
);
460 zsend_interface_delete(client
, ifp
);
461 zsend_interface_vrf_update(client
, ifp
, new_vrf_id
);
465 /* Interface VRF change. This function is invoked *post* VRF change and sends an
466 * add to clients who are interested in the new VRF but not in the old VRF.
468 void zebra_interface_vrf_update_add(struct interface
*ifp
, vrf_id_t old_vrf_id
)
470 struct listnode
*node
, *nnode
;
471 struct zserv
*client
;
473 if (IS_ZEBRA_DEBUG_EVENT
)
475 "MESSAGE: ZEBRA_INTERFACE_VRF_UPDATE/ADD %s VRF Id %u -> %u",
476 ifp
->name
, old_vrf_id
, ifp
->vrf_id
);
478 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, node
, nnode
, client
)) {
479 /* Need to add if the client is interested in the new VRF. */
481 zsend_interface_add(client
, ifp
);
482 zsend_interface_addresses(client
, ifp
);
486 int zebra_add_import_table_entry(struct route_node
*rn
, struct route_entry
*re
,
487 const char *rmap_name
)
489 struct route_entry
*newre
;
490 struct route_entry
*same
;
492 route_map_result_t ret
= RMAP_MATCH
;
495 afi
= family2afi(rn
->p
.family
);
497 ret
= zebra_import_table_route_map_check(
498 afi
, re
->type
, &rn
->p
, re
->nexthop
, re
->vrf_id
,
501 if (ret
!= RMAP_MATCH
) {
502 zebra_del_import_table_entry(rn
, re
);
506 prefix_copy(&p
, &rn
->p
);
508 RNODE_FOREACH_RE (rn
, same
) {
509 if (CHECK_FLAG(same
->status
, ROUTE_ENTRY_REMOVED
))
512 if (same
->type
== re
->type
513 && same
->instance
== re
->instance
514 && same
->table
== re
->table
515 && same
->type
!= ZEBRA_ROUTE_CONNECT
)
520 zebra_del_import_table_entry(rn
, same
);
522 if (re
->nexthop_num
== 1) {
523 rib_add(afi
, SAFI_UNICAST
, re
->vrf_id
,
524 ZEBRA_ROUTE_TABLE
, re
->table
, 0, &p
,
526 zebrad
.rtm_table_default
, re
->metric
,
528 zebra_import_table_distance
[afi
]
530 } else if (re
->nexthop_num
> 1) {
531 newre
= XCALLOC(MTYPE_RE
,
532 sizeof(struct route_entry
));
533 newre
->type
= ZEBRA_ROUTE_TABLE
;
535 zebra_import_table_distance
[afi
][re
->table
];
536 newre
->flags
= re
->flags
;
537 newre
->metric
= re
->metric
;
538 newre
->mtu
= re
->mtu
;
539 newre
->table
= zebrad
.rtm_table_default
;
540 newre
->nexthop_num
= 0;
541 newre
->uptime
= time(NULL
);
542 newre
->instance
= re
->table
;
543 route_entry_copy_nexthops(newre
, re
->nexthop
);
545 rib_add_multipath(afi
, SAFI_UNICAST
, &p
,
551 int zebra_del_import_table_entry(struct route_node
*rn
, struct route_entry
*re
)
556 afi
= family2afi(rn
->p
.family
);
557 prefix_copy(&p
, &rn
->p
);
559 rib_delete(afi
, SAFI_UNICAST
, re
->vrf_id
, ZEBRA_ROUTE_TABLE
,
560 re
->table
, re
->flags
, &p
, NULL
, NULL
,
561 zebrad
.rtm_table_default
, re
->metric
, false);
566 /* Assuming no one calls this with the main routing table */
567 int zebra_import_table(afi_t afi
, u_int32_t table_id
, u_int32_t distance
,
568 const char *rmap_name
, int add
)
570 struct route_table
*table
;
571 struct route_entry
*re
;
572 struct route_node
*rn
;
574 if (!is_zebra_valid_kernel_table(table_id
)
575 || ((table_id
== RT_TABLE_MAIN
)
576 || (table_id
== zebrad
.rtm_table_default
)))
582 table
= zebra_vrf_other_route_table(afi
, table_id
, VRF_DEFAULT
);
585 } else if (IS_ZEBRA_DEBUG_RIB
) {
586 zlog_debug("%s routes from table %d",
587 add
? "Importing" : "Unimporting", table_id
);
592 zebra_add_import_table_route_map(afi
, rmap_name
,
596 zebra_get_import_table_route_map(afi
, table_id
);
598 zebra_del_import_table_route_map(afi
, table_id
);
601 zebra_import_table_used
[afi
][table_id
] = 1;
602 zebra_import_table_distance
[afi
][table_id
] = distance
;
604 zebra_import_table_used
[afi
][table_id
] = 0;
605 zebra_import_table_distance
[afi
][table_id
] =
606 ZEBRA_TABLE_DISTANCE_DEFAULT
;
608 rmap_name
= zebra_get_import_table_route_map(afi
, table_id
);
610 zebra_del_import_table_route_map(afi
, table_id
);
613 for (rn
= route_top(table
); rn
; rn
= route_next(rn
)) {
614 /* For each entry in the non-default routing table,
615 * add the entry in the main table
620 RNODE_FOREACH_RE (rn
, re
) {
621 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
))
629 if (((afi
== AFI_IP
) && (rn
->p
.family
== AF_INET
))
630 || ((afi
== AFI_IP6
) && (rn
->p
.family
== AF_INET6
))) {
632 zebra_add_import_table_entry(rn
, re
, rmap_name
);
634 zebra_del_import_table_entry(rn
, re
);
640 int zebra_import_table_config(struct vty
*vty
)
645 char afi_str
[AFI_MAX
][10] = {"", "ip", "ipv6", "ethernet"};
646 const char *rmap_name
;
648 for (afi
= AFI_IP
; afi
< AFI_MAX
; afi
++) {
649 for (i
= 1; i
< ZEBRA_KERNEL_TABLE_MAX
; i
++) {
650 if (!is_zebra_import_table_enabled(afi
, i
))
653 if (zebra_import_table_distance
[afi
][i
]
654 != ZEBRA_TABLE_DISTANCE_DEFAULT
) {
656 "%s import-table %d distance %d",
658 zebra_import_table_distance
[afi
][i
]);
660 vty_out(vty
, "%s import-table %d",
664 rmap_name
= zebra_get_import_table_route_map(afi
, i
);
666 vty_out(vty
, " route-map %s",
677 void zebra_import_table_rm_update()
681 struct route_table
*table
;
682 struct route_entry
*re
;
683 struct route_node
*rn
;
684 const char *rmap_name
;
686 for (afi
= AFI_IP
; afi
< AFI_MAX
; afi
++) {
687 for (i
= 1; i
< ZEBRA_KERNEL_TABLE_MAX
; i
++) {
688 if (!is_zebra_import_table_enabled(afi
, i
))
691 rmap_name
= zebra_get_import_table_route_map(afi
, i
);
695 table
= zebra_vrf_other_route_table(afi
,
698 for (rn
= route_top(table
); rn
;
699 rn
= route_next(rn
)) {
700 /* For each entry in the non-default
702 * add the entry in the main table
707 RNODE_FOREACH_RE (rn
, re
) {
708 if (CHECK_FLAG(re
->status
,
709 ROUTE_ENTRY_REMOVED
))
718 && (rn
->p
.family
== AF_INET
))
720 && (rn
->p
.family
== AF_INET6
)))
721 zebra_add_import_table_entry(
730 /* Interface parameters update */
731 void zebra_interface_parameters_update(struct interface
*ifp
)
733 struct listnode
*node
, *nnode
;
734 struct zserv
*client
;
736 if (IS_ZEBRA_DEBUG_EVENT
)
737 zlog_debug("MESSAGE: ZEBRA_INTERFACE_LINK_PARAMS %s",
740 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, node
, nnode
, client
))
742 zsend_interface_link_params(client
, ifp
);