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 STREAM_GETC(client
->ibuf
, afi
);
254 STREAM_GETC(client
->ibuf
, type
);
255 STREAM_GETW(client
->ibuf
, instance
);
257 if (afi
== 0 || afi
> AFI_MAX
) {
258 zlog_warn("%s: Specified afi %d does not exist",
259 __PRETTY_FUNCTION__
, afi
);
263 if (type
== 0 || type
>= ZEBRA_ROUTE_MAX
) {
264 zlog_warn("%s: Specified Route Type %d does not exist",
265 __PRETTY_FUNCTION__
, type
);
270 if (!redist_check_instance(&client
->mi_redist
[afi
][type
],
272 redist_add_instance(&client
->mi_redist
[afi
][type
],
274 zebra_redistribute(client
, type
, instance
,
278 if (!vrf_bitmap_check(client
->redist
[afi
][type
],
280 vrf_bitmap_set(client
->redist
[afi
][type
],
282 zebra_redistribute(client
, type
, 0, zvrf_id(zvrf
), afi
);
290 void zebra_redistribute_delete(int command
, struct zserv
*client
, int length
,
291 struct zebra_vrf
*zvrf
)
297 STREAM_GETC(client
->ibuf
, afi
);
298 STREAM_GETC(client
->ibuf
, type
);
299 STREAM_GETW(client
->ibuf
, instance
);
301 if (afi
== 0 || afi
> AFI_MAX
) {
302 zlog_warn("%s: Specified afi %d does not exist",
303 __PRETTY_FUNCTION__
, afi
);
307 if (type
== 0 || type
>= ZEBRA_ROUTE_MAX
) {
308 zlog_warn("%s: Specified Route Type %d does not exist",
309 __PRETTY_FUNCTION__
, type
);
314 * NOTE: no need to withdraw the previously advertised routes. The
316 * themselves should keep track of the received routes from zebra and
317 * withdraw them when necessary.
320 redist_del_instance(&client
->mi_redist
[afi
][type
], instance
);
322 vrf_bitmap_unset(client
->redist
[afi
][type
], zvrf_id(zvrf
));
328 void zebra_redistribute_default_add(int command
, struct zserv
*client
,
329 int length
, struct zebra_vrf
*zvrf
)
331 vrf_bitmap_set(client
->redist_default
, zvrf_id(zvrf
));
332 zebra_redistribute_default(client
, zvrf_id(zvrf
));
335 void zebra_redistribute_default_delete(int command
, struct zserv
*client
,
336 int length
, struct zebra_vrf
*zvrf
)
338 vrf_bitmap_unset(client
->redist_default
, zvrf_id(zvrf
));
341 /* Interface up information. */
342 void zebra_interface_up_update(struct interface
*ifp
)
344 struct listnode
*node
, *nnode
;
345 struct zserv
*client
;
347 if (IS_ZEBRA_DEBUG_EVENT
)
348 zlog_debug("MESSAGE: ZEBRA_INTERFACE_UP %s", ifp
->name
);
350 if (ifp
->ptm_status
|| !ifp
->ptm_enable
) {
351 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, node
, nnode
, client
))
352 if (client
->ifinfo
) {
353 zsend_interface_update(ZEBRA_INTERFACE_UP
,
355 zsend_interface_link_params(client
, ifp
);
360 /* Interface down information. */
361 void zebra_interface_down_update(struct interface
*ifp
)
363 struct listnode
*node
, *nnode
;
364 struct zserv
*client
;
366 if (IS_ZEBRA_DEBUG_EVENT
)
367 zlog_debug("MESSAGE: ZEBRA_INTERFACE_DOWN %s", ifp
->name
);
369 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, node
, nnode
, client
)) {
370 zsend_interface_update(ZEBRA_INTERFACE_DOWN
, client
, ifp
);
374 /* Interface information update. */
375 void zebra_interface_add_update(struct interface
*ifp
)
377 struct listnode
*node
, *nnode
;
378 struct zserv
*client
;
380 if (IS_ZEBRA_DEBUG_EVENT
)
381 zlog_debug("MESSAGE: ZEBRA_INTERFACE_ADD %s[%d]", ifp
->name
,
384 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, node
, nnode
, client
))
385 if (client
->ifinfo
) {
387 zsend_interface_add(client
, ifp
);
388 zsend_interface_link_params(client
, ifp
);
392 void zebra_interface_delete_update(struct interface
*ifp
)
394 struct listnode
*node
, *nnode
;
395 struct zserv
*client
;
397 if (IS_ZEBRA_DEBUG_EVENT
)
398 zlog_debug("MESSAGE: ZEBRA_INTERFACE_DELETE %s", ifp
->name
);
400 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, node
, nnode
, client
)) {
402 zsend_interface_delete(client
, ifp
);
406 /* Interface address addition. */
407 void zebra_interface_address_add_update(struct interface
*ifp
,
408 struct connected
*ifc
)
410 struct listnode
*node
, *nnode
;
411 struct zserv
*client
;
414 if (IS_ZEBRA_DEBUG_EVENT
) {
415 char buf
[PREFIX_STRLEN
];
418 zlog_debug("MESSAGE: ZEBRA_INTERFACE_ADDRESS_ADD %s on %s",
419 prefix2str(p
, buf
, sizeof(buf
)), ifc
->ifp
->name
);
422 if (!CHECK_FLAG(ifc
->conf
, ZEBRA_IFC_REAL
))
424 "WARNING: advertising address to clients that is not yet usable.");
426 zebra_vxlan_add_del_gw_macip(ifp
, ifc
->address
, 1);
428 router_id_add_address(ifc
);
430 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, node
, nnode
, client
))
431 if (CHECK_FLAG(ifc
->conf
, ZEBRA_IFC_REAL
)) {
432 client
->connected_rt_add_cnt
++;
433 zsend_interface_address(ZEBRA_INTERFACE_ADDRESS_ADD
,
438 /* Interface address deletion. */
439 void zebra_interface_address_delete_update(struct interface
*ifp
,
440 struct connected
*ifc
)
442 struct listnode
*node
, *nnode
;
443 struct zserv
*client
;
446 if (IS_ZEBRA_DEBUG_EVENT
) {
447 char buf
[PREFIX_STRLEN
];
450 zlog_debug("MESSAGE: ZEBRA_INTERFACE_ADDRESS_DELETE %s on %s",
451 prefix2str(p
, buf
, sizeof(buf
)), ifc
->ifp
->name
);
454 zebra_vxlan_add_del_gw_macip(ifp
, ifc
->address
, 0);
456 router_id_del_address(ifc
);
458 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, node
, nnode
, client
))
459 if (CHECK_FLAG(ifc
->conf
, ZEBRA_IFC_REAL
)) {
460 client
->connected_rt_del_cnt
++;
461 zsend_interface_address(ZEBRA_INTERFACE_ADDRESS_DELETE
,
466 /* Interface VRF change. May need to delete from clients not interested in
467 * the new VRF. Note that this function is invoked *prior* to the VRF change.
469 void zebra_interface_vrf_update_del(struct interface
*ifp
, vrf_id_t new_vrf_id
)
471 struct listnode
*node
, *nnode
;
472 struct zserv
*client
;
474 if (IS_ZEBRA_DEBUG_EVENT
)
476 "MESSAGE: ZEBRA_INTERFACE_VRF_UPDATE/DEL %s VRF Id %u -> %u",
477 ifp
->name
, ifp
->vrf_id
, new_vrf_id
);
479 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, node
, nnode
, client
)) {
480 /* Need to delete if the client is not interested in the new
482 zsend_interface_update(ZEBRA_INTERFACE_DOWN
, client
, ifp
);
484 zsend_interface_delete(client
, ifp
);
485 zsend_interface_vrf_update(client
, ifp
, new_vrf_id
);
489 /* Interface VRF change. This function is invoked *post* VRF change and sends an
490 * add to clients who are interested in the new VRF but not in the old VRF.
492 void zebra_interface_vrf_update_add(struct interface
*ifp
, vrf_id_t old_vrf_id
)
494 struct listnode
*node
, *nnode
;
495 struct zserv
*client
;
497 if (IS_ZEBRA_DEBUG_EVENT
)
499 "MESSAGE: ZEBRA_INTERFACE_VRF_UPDATE/ADD %s VRF Id %u -> %u",
500 ifp
->name
, old_vrf_id
, ifp
->vrf_id
);
502 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, node
, nnode
, client
)) {
503 /* Need to add if the client is interested in the new VRF. */
505 zsend_interface_add(client
, ifp
);
506 zsend_interface_addresses(client
, ifp
);
510 int zebra_add_import_table_entry(struct route_node
*rn
, struct route_entry
*re
,
511 const char *rmap_name
)
513 struct route_entry
*newre
;
514 struct route_entry
*same
;
516 route_map_result_t ret
= RMAP_MATCH
;
519 afi
= family2afi(rn
->p
.family
);
521 ret
= zebra_import_table_route_map_check(
522 afi
, re
->type
, &rn
->p
, re
->ng
.nexthop
, re
->vrf_id
,
525 if (ret
!= RMAP_MATCH
) {
526 zebra_del_import_table_entry(rn
, re
);
530 prefix_copy(&p
, &rn
->p
);
532 RNODE_FOREACH_RE (rn
, same
) {
533 if (CHECK_FLAG(same
->status
, ROUTE_ENTRY_REMOVED
))
536 if (same
->type
== re
->type
&& same
->instance
== re
->instance
537 && same
->table
== re
->table
538 && same
->type
!= ZEBRA_ROUTE_CONNECT
)
543 zebra_del_import_table_entry(rn
, same
);
545 newre
= XCALLOC(MTYPE_RE
, sizeof(struct route_entry
));
546 newre
->type
= ZEBRA_ROUTE_TABLE
;
547 newre
->distance
= zebra_import_table_distance
[afi
][re
->table
];
548 newre
->flags
= re
->flags
;
549 newre
->metric
= re
->metric
;
550 newre
->mtu
= re
->mtu
;
551 newre
->table
= zebrad
.rtm_table_default
;
552 newre
->nexthop_num
= 0;
553 newre
->uptime
= time(NULL
);
554 newre
->instance
= re
->table
;
555 route_entry_copy_nexthops(newre
, re
->ng
.nexthop
);
557 rib_add_multipath(afi
, SAFI_UNICAST
, &p
, NULL
, newre
);
562 int zebra_del_import_table_entry(struct route_node
*rn
, struct route_entry
*re
)
567 afi
= family2afi(rn
->p
.family
);
568 prefix_copy(&p
, &rn
->p
);
570 rib_delete(afi
, SAFI_UNICAST
, re
->vrf_id
, ZEBRA_ROUTE_TABLE
, re
->table
,
571 re
->flags
, &p
, NULL
, re
->ng
.nexthop
,
572 zebrad
.rtm_table_default
, re
->metric
, false, NULL
);
577 /* Assuming no one calls this with the main routing table */
578 int zebra_import_table(afi_t afi
, u_int32_t table_id
, u_int32_t distance
,
579 const char *rmap_name
, int add
)
581 struct route_table
*table
;
582 struct route_entry
*re
;
583 struct route_node
*rn
;
585 if (!is_zebra_valid_kernel_table(table_id
)
586 || ((table_id
== RT_TABLE_MAIN
)
587 || (table_id
== zebrad
.rtm_table_default
)))
593 table
= zebra_vrf_other_route_table(afi
, table_id
, VRF_DEFAULT
);
596 } else if (IS_ZEBRA_DEBUG_RIB
) {
597 zlog_debug("%s routes from table %d",
598 add
? "Importing" : "Unimporting", table_id
);
603 zebra_add_import_table_route_map(afi
, rmap_name
,
607 zebra_get_import_table_route_map(afi
, table_id
);
609 zebra_del_import_table_route_map(afi
, table_id
);
612 zebra_import_table_used
[afi
][table_id
] = 1;
613 zebra_import_table_distance
[afi
][table_id
] = distance
;
615 zebra_import_table_used
[afi
][table_id
] = 0;
616 zebra_import_table_distance
[afi
][table_id
] =
617 ZEBRA_TABLE_DISTANCE_DEFAULT
;
619 rmap_name
= zebra_get_import_table_route_map(afi
, table_id
);
621 zebra_del_import_table_route_map(afi
, table_id
);
624 for (rn
= route_top(table
); rn
; rn
= route_next(rn
)) {
625 /* For each entry in the non-default routing table,
626 * add the entry in the main table
631 RNODE_FOREACH_RE (rn
, re
) {
632 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
))
640 if (((afi
== AFI_IP
) && (rn
->p
.family
== AF_INET
))
641 || ((afi
== AFI_IP6
) && (rn
->p
.family
== AF_INET6
))) {
643 zebra_add_import_table_entry(rn
, re
, rmap_name
);
645 zebra_del_import_table_entry(rn
, re
);
651 int zebra_import_table_config(struct vty
*vty
)
656 char afi_str
[AFI_MAX
][10] = {"", "ip", "ipv6", "ethernet"};
657 const char *rmap_name
;
659 for (afi
= AFI_IP
; afi
< AFI_MAX
; afi
++) {
660 for (i
= 1; i
< ZEBRA_KERNEL_TABLE_MAX
; i
++) {
661 if (!is_zebra_import_table_enabled(afi
, i
))
664 if (zebra_import_table_distance
[afi
][i
]
665 != ZEBRA_TABLE_DISTANCE_DEFAULT
) {
666 vty_out(vty
, "%s import-table %d distance %d",
668 zebra_import_table_distance
[afi
][i
]);
670 vty_out(vty
, "%s import-table %d", afi_str
[afi
],
674 rmap_name
= zebra_get_import_table_route_map(afi
, i
);
676 vty_out(vty
, " route-map %s", rmap_name
);
686 void zebra_import_table_rm_update()
690 struct route_table
*table
;
691 struct route_entry
*re
;
692 struct route_node
*rn
;
693 const char *rmap_name
;
695 for (afi
= AFI_IP
; afi
< AFI_MAX
; afi
++) {
696 for (i
= 1; i
< ZEBRA_KERNEL_TABLE_MAX
; i
++) {
697 if (!is_zebra_import_table_enabled(afi
, i
))
700 rmap_name
= zebra_get_import_table_route_map(afi
, i
);
704 table
= zebra_vrf_other_route_table(afi
, i
,
706 for (rn
= route_top(table
); rn
; rn
= route_next(rn
)) {
707 /* For each entry in the non-default
709 * add the entry in the main table
714 RNODE_FOREACH_RE (rn
, re
) {
715 if (CHECK_FLAG(re
->status
,
716 ROUTE_ENTRY_REMOVED
))
725 && (rn
->p
.family
== AF_INET
))
727 && (rn
->p
.family
== AF_INET6
)))
728 zebra_add_import_table_entry(rn
, re
,
737 /* Interface parameters update */
738 void zebra_interface_parameters_update(struct interface
*ifp
)
740 struct listnode
*node
, *nnode
;
741 struct zserv
*client
;
743 if (IS_ZEBRA_DEBUG_EVENT
)
744 zlog_debug("MESSAGE: ZEBRA_INTERFACE_LINK_PARAMS %s",
747 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, node
, nnode
, client
))
749 zsend_interface_link_params(client
, ifp
);