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(ZAPI_HANDLER_ARGS
)
252 STREAM_GETC(msg
, afi
);
253 STREAM_GETC(msg
, type
);
254 STREAM_GETW(msg
, instance
);
256 if (afi
== 0 || afi
> AFI_MAX
) {
257 zlog_warn("%s: Specified afi %d does not exist",
258 __PRETTY_FUNCTION__
, afi
);
262 if (type
== 0 || type
>= ZEBRA_ROUTE_MAX
) {
263 zlog_warn("%s: Specified Route Type %d does not exist",
264 __PRETTY_FUNCTION__
, type
);
269 if (!redist_check_instance(&client
->mi_redist
[afi
][type
],
271 redist_add_instance(&client
->mi_redist
[afi
][type
],
273 zebra_redistribute(client
, type
, instance
,
277 if (!vrf_bitmap_check(client
->redist
[afi
][type
],
279 vrf_bitmap_set(client
->redist
[afi
][type
],
281 zebra_redistribute(client
, type
, 0, zvrf_id(zvrf
), afi
);
289 void zebra_redistribute_delete(ZAPI_HANDLER_ARGS
)
295 STREAM_GETC(msg
, afi
);
296 STREAM_GETC(msg
, type
);
297 STREAM_GETW(msg
, instance
);
299 if (afi
== 0 || afi
> AFI_MAX
) {
300 zlog_warn("%s: Specified afi %d does not exist",
301 __PRETTY_FUNCTION__
, afi
);
305 if (type
== 0 || type
>= ZEBRA_ROUTE_MAX
) {
306 zlog_warn("%s: Specified Route Type %d does not exist",
307 __PRETTY_FUNCTION__
, type
);
312 * NOTE: no need to withdraw the previously advertised routes. The
314 * themselves should keep track of the received routes from zebra and
315 * withdraw them when necessary.
318 redist_del_instance(&client
->mi_redist
[afi
][type
], instance
);
320 vrf_bitmap_unset(client
->redist
[afi
][type
], zvrf_id(zvrf
));
326 void zebra_redistribute_default_add(ZAPI_HANDLER_ARGS
)
328 vrf_bitmap_set(client
->redist_default
, zvrf_id(zvrf
));
329 zebra_redistribute_default(client
, zvrf_id(zvrf
));
332 void zebra_redistribute_default_delete(ZAPI_HANDLER_ARGS
)
334 vrf_bitmap_unset(client
->redist_default
, zvrf_id(zvrf
));
337 /* Interface up information. */
338 void zebra_interface_up_update(struct interface
*ifp
)
340 struct listnode
*node
, *nnode
;
341 struct zserv
*client
;
343 if (IS_ZEBRA_DEBUG_EVENT
)
344 zlog_debug("MESSAGE: ZEBRA_INTERFACE_UP %s", ifp
->name
);
346 if (ifp
->ptm_status
|| !ifp
->ptm_enable
) {
347 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, node
, nnode
, client
))
348 if (client
->ifinfo
) {
349 zsend_interface_update(ZEBRA_INTERFACE_UP
,
351 zsend_interface_link_params(client
, ifp
);
356 /* Interface down information. */
357 void zebra_interface_down_update(struct interface
*ifp
)
359 struct listnode
*node
, *nnode
;
360 struct zserv
*client
;
362 if (IS_ZEBRA_DEBUG_EVENT
)
363 zlog_debug("MESSAGE: ZEBRA_INTERFACE_DOWN %s", ifp
->name
);
365 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, node
, nnode
, client
)) {
366 zsend_interface_update(ZEBRA_INTERFACE_DOWN
, client
, ifp
);
370 /* Interface information update. */
371 void zebra_interface_add_update(struct interface
*ifp
)
373 struct listnode
*node
, *nnode
;
374 struct zserv
*client
;
376 if (IS_ZEBRA_DEBUG_EVENT
)
377 zlog_debug("MESSAGE: ZEBRA_INTERFACE_ADD %s[%d]", ifp
->name
,
380 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, node
, nnode
, client
))
381 if (client
->ifinfo
) {
383 zsend_interface_add(client
, ifp
);
384 zsend_interface_link_params(client
, ifp
);
388 void zebra_interface_delete_update(struct interface
*ifp
)
390 struct listnode
*node
, *nnode
;
391 struct zserv
*client
;
393 if (IS_ZEBRA_DEBUG_EVENT
)
394 zlog_debug("MESSAGE: ZEBRA_INTERFACE_DELETE %s", ifp
->name
);
396 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, node
, nnode
, client
)) {
398 zsend_interface_delete(client
, ifp
);
402 /* Interface address addition. */
403 void zebra_interface_address_add_update(struct interface
*ifp
,
404 struct connected
*ifc
)
406 struct listnode
*node
, *nnode
;
407 struct zserv
*client
;
410 if (IS_ZEBRA_DEBUG_EVENT
) {
411 char buf
[PREFIX_STRLEN
];
414 zlog_debug("MESSAGE: ZEBRA_INTERFACE_ADDRESS_ADD %s on %s",
415 prefix2str(p
, buf
, sizeof(buf
)), ifc
->ifp
->name
);
418 if (!CHECK_FLAG(ifc
->conf
, ZEBRA_IFC_REAL
))
420 "WARNING: advertising address to clients that is not yet usable.");
422 zebra_vxlan_add_del_gw_macip(ifp
, ifc
->address
, 1);
424 router_id_add_address(ifc
);
426 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, node
, nnode
, client
))
427 if (CHECK_FLAG(ifc
->conf
, ZEBRA_IFC_REAL
)) {
428 client
->connected_rt_add_cnt
++;
429 zsend_interface_address(ZEBRA_INTERFACE_ADDRESS_ADD
,
434 /* Interface address deletion. */
435 void zebra_interface_address_delete_update(struct interface
*ifp
,
436 struct connected
*ifc
)
438 struct listnode
*node
, *nnode
;
439 struct zserv
*client
;
442 if (IS_ZEBRA_DEBUG_EVENT
) {
443 char buf
[PREFIX_STRLEN
];
446 zlog_debug("MESSAGE: ZEBRA_INTERFACE_ADDRESS_DELETE %s on %s",
447 prefix2str(p
, buf
, sizeof(buf
)), ifc
->ifp
->name
);
450 zebra_vxlan_add_del_gw_macip(ifp
, ifc
->address
, 0);
452 router_id_del_address(ifc
);
454 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, node
, nnode
, client
))
455 if (CHECK_FLAG(ifc
->conf
, ZEBRA_IFC_REAL
)) {
456 client
->connected_rt_del_cnt
++;
457 zsend_interface_address(ZEBRA_INTERFACE_ADDRESS_DELETE
,
462 /* Interface VRF change. May need to delete from clients not interested in
463 * the new VRF. Note that this function is invoked *prior* to the VRF change.
465 void zebra_interface_vrf_update_del(struct interface
*ifp
, vrf_id_t new_vrf_id
)
467 struct listnode
*node
, *nnode
;
468 struct zserv
*client
;
470 if (IS_ZEBRA_DEBUG_EVENT
)
472 "MESSAGE: ZEBRA_INTERFACE_VRF_UPDATE/DEL %s VRF Id %u -> %u",
473 ifp
->name
, ifp
->vrf_id
, new_vrf_id
);
475 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, node
, nnode
, client
)) {
476 /* Need to delete if the client is not interested in the new
478 zsend_interface_update(ZEBRA_INTERFACE_DOWN
, client
, ifp
);
480 zsend_interface_delete(client
, ifp
);
481 zsend_interface_vrf_update(client
, ifp
, new_vrf_id
);
485 /* Interface VRF change. This function is invoked *post* VRF change and sends an
486 * add to clients who are interested in the new VRF but not in the old VRF.
488 void zebra_interface_vrf_update_add(struct interface
*ifp
, vrf_id_t old_vrf_id
)
490 struct listnode
*node
, *nnode
;
491 struct zserv
*client
;
493 if (IS_ZEBRA_DEBUG_EVENT
)
495 "MESSAGE: ZEBRA_INTERFACE_VRF_UPDATE/ADD %s VRF Id %u -> %u",
496 ifp
->name
, old_vrf_id
, ifp
->vrf_id
);
498 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, node
, nnode
, client
)) {
499 /* Need to add if the client is interested in the new VRF. */
501 zsend_interface_add(client
, ifp
);
502 zsend_interface_addresses(client
, ifp
);
506 int zebra_add_import_table_entry(struct route_node
*rn
, struct route_entry
*re
,
507 const char *rmap_name
)
509 struct route_entry
*newre
;
510 struct route_entry
*same
;
512 route_map_result_t ret
= RMAP_MATCH
;
515 afi
= family2afi(rn
->p
.family
);
517 ret
= zebra_import_table_route_map_check(
518 afi
, re
->type
, &rn
->p
, re
->ng
.nexthop
, re
->vrf_id
,
521 if (ret
!= RMAP_MATCH
) {
522 zebra_del_import_table_entry(rn
, re
);
526 prefix_copy(&p
, &rn
->p
);
528 RNODE_FOREACH_RE (rn
, same
) {
529 if (CHECK_FLAG(same
->status
, ROUTE_ENTRY_REMOVED
))
532 if (same
->type
== re
->type
&& same
->instance
== re
->instance
533 && same
->table
== re
->table
534 && same
->type
!= ZEBRA_ROUTE_CONNECT
)
539 zebra_del_import_table_entry(rn
, same
);
541 newre
= XCALLOC(MTYPE_RE
, sizeof(struct route_entry
));
542 newre
->type
= ZEBRA_ROUTE_TABLE
;
543 newre
->distance
= zebra_import_table_distance
[afi
][re
->table
];
544 newre
->flags
= re
->flags
;
545 newre
->metric
= re
->metric
;
546 newre
->mtu
= re
->mtu
;
547 newre
->table
= zebrad
.rtm_table_default
;
548 newre
->nexthop_num
= 0;
549 newre
->uptime
= time(NULL
);
550 newre
->instance
= re
->table
;
551 route_entry_copy_nexthops(newre
, re
->ng
.nexthop
);
553 rib_add_multipath(afi
, SAFI_UNICAST
, &p
, NULL
, newre
);
558 int zebra_del_import_table_entry(struct route_node
*rn
, struct route_entry
*re
)
563 afi
= family2afi(rn
->p
.family
);
564 prefix_copy(&p
, &rn
->p
);
566 rib_delete(afi
, SAFI_UNICAST
, re
->vrf_id
, ZEBRA_ROUTE_TABLE
, re
->table
,
567 re
->flags
, &p
, NULL
, re
->ng
.nexthop
,
568 zebrad
.rtm_table_default
, re
->metric
, false, NULL
);
573 /* Assuming no one calls this with the main routing table */
574 int zebra_import_table(afi_t afi
, u_int32_t table_id
, u_int32_t distance
,
575 const char *rmap_name
, int add
)
577 struct route_table
*table
;
578 struct route_entry
*re
;
579 struct route_node
*rn
;
581 if (!is_zebra_valid_kernel_table(table_id
)
582 || ((table_id
== RT_TABLE_MAIN
)
583 || (table_id
== zebrad
.rtm_table_default
)))
589 table
= zebra_vrf_other_route_table(afi
, table_id
, VRF_DEFAULT
);
592 } else if (IS_ZEBRA_DEBUG_RIB
) {
593 zlog_debug("%s routes from table %d",
594 add
? "Importing" : "Unimporting", table_id
);
599 zebra_add_import_table_route_map(afi
, rmap_name
,
603 zebra_get_import_table_route_map(afi
, table_id
);
605 zebra_del_import_table_route_map(afi
, table_id
);
608 zebra_import_table_used
[afi
][table_id
] = 1;
609 zebra_import_table_distance
[afi
][table_id
] = distance
;
611 zebra_import_table_used
[afi
][table_id
] = 0;
612 zebra_import_table_distance
[afi
][table_id
] =
613 ZEBRA_TABLE_DISTANCE_DEFAULT
;
615 rmap_name
= zebra_get_import_table_route_map(afi
, table_id
);
617 zebra_del_import_table_route_map(afi
, table_id
);
620 for (rn
= route_top(table
); rn
; rn
= route_next(rn
)) {
621 /* For each entry in the non-default routing table,
622 * add the entry in the main table
627 RNODE_FOREACH_RE (rn
, re
) {
628 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
))
636 if (((afi
== AFI_IP
) && (rn
->p
.family
== AF_INET
))
637 || ((afi
== AFI_IP6
) && (rn
->p
.family
== AF_INET6
))) {
639 zebra_add_import_table_entry(rn
, re
, rmap_name
);
641 zebra_del_import_table_entry(rn
, re
);
647 int zebra_import_table_config(struct vty
*vty
)
652 char afi_str
[AFI_MAX
][10] = {"", "ip", "ipv6", "ethernet"};
653 const char *rmap_name
;
655 for (afi
= AFI_IP
; afi
< AFI_MAX
; afi
++) {
656 for (i
= 1; i
< ZEBRA_KERNEL_TABLE_MAX
; i
++) {
657 if (!is_zebra_import_table_enabled(afi
, i
))
660 if (zebra_import_table_distance
[afi
][i
]
661 != ZEBRA_TABLE_DISTANCE_DEFAULT
) {
662 vty_out(vty
, "%s import-table %d distance %d",
664 zebra_import_table_distance
[afi
][i
]);
666 vty_out(vty
, "%s import-table %d", afi_str
[afi
],
670 rmap_name
= zebra_get_import_table_route_map(afi
, i
);
672 vty_out(vty
, " route-map %s", rmap_name
);
682 void zebra_import_table_rm_update()
686 struct route_table
*table
;
687 struct route_entry
*re
;
688 struct route_node
*rn
;
689 const char *rmap_name
;
691 for (afi
= AFI_IP
; afi
< AFI_MAX
; afi
++) {
692 for (i
= 1; i
< ZEBRA_KERNEL_TABLE_MAX
; i
++) {
693 if (!is_zebra_import_table_enabled(afi
, i
))
696 rmap_name
= zebra_get_import_table_route_map(afi
, i
);
700 table
= zebra_vrf_other_route_table(afi
, i
,
702 for (rn
= route_top(table
); rn
; rn
= route_next(rn
)) {
703 /* For each entry in the non-default
705 * add the entry in the main table
710 RNODE_FOREACH_RE (rn
, re
) {
711 if (CHECK_FLAG(re
->status
,
712 ROUTE_ENTRY_REMOVED
))
721 && (rn
->p
.family
== AF_INET
))
723 && (rn
->p
.family
== AF_INET6
)))
724 zebra_add_import_table_entry(rn
, re
,
733 /* Interface parameters update */
734 void zebra_interface_parameters_update(struct interface
*ifp
)
736 struct listnode
*node
, *nnode
;
737 struct zserv
*client
;
739 if (IS_ZEBRA_DEBUG_EVENT
)
740 zlog_debug("MESSAGE: ZEBRA_INTERFACE_LINK_PARAMS %s",
743 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, node
, nnode
, client
))
745 zsend_interface_link_params(client
, ifp
);