2 * Copyright (C) 2000 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
37 #include "bgpd/bgpd.h"
38 #include "bgpd/bgp_table.h"
39 #include "bgpd/bgp_route.h"
40 #include "bgpd/bgp_attr.h"
41 #include "bgpd/bgp_nexthop.h"
42 #include "bgpd/bgp_nht.h"
43 #include "bgpd/bgp_debug.h"
44 #include "bgpd/bgp_damp.h"
45 #include "bgpd/bgp_fsm.h"
46 #include "bgpd/bgp_vty.h"
48 DEFINE_MTYPE_STATIC(BGPD
, MARTIAN_STRING
, "BGP Martian Address Intf String");
50 char *bnc_str(struct bgp_nexthop_cache
*bnc
, char *buf
, int size
)
52 prefix2str(&(bnc
->node
->p
), buf
, size
);
56 void bnc_nexthop_free(struct bgp_nexthop_cache
*bnc
)
58 nexthops_free(bnc
->nexthop
);
61 struct bgp_nexthop_cache
*bnc_new(void)
63 struct bgp_nexthop_cache
*bnc
;
65 bnc
= XCALLOC(MTYPE_BGP_NEXTHOP_CACHE
,
66 sizeof(struct bgp_nexthop_cache
));
67 LIST_INIT(&(bnc
->paths
));
71 void bnc_free(struct bgp_nexthop_cache
*bnc
)
73 bnc_nexthop_free(bnc
);
74 XFREE(MTYPE_BGP_NEXTHOP_CACHE
, bnc
);
77 /* Reset and free all BGP nexthop cache. */
78 static void bgp_nexthop_cache_reset(struct bgp_table
*table
)
81 struct bgp_nexthop_cache
*bnc
;
83 for (rn
= bgp_table_top(table
); rn
; rn
= bgp_route_next(rn
)) {
84 bnc
= bgp_node_get_bgp_nexthop_info(rn
);
88 while (!LIST_EMPTY(&(bnc
->paths
))) {
89 struct bgp_path_info
*path
= LIST_FIRST(&(bnc
->paths
));
91 path_nh_map(path
, bnc
, false);
95 bgp_node_set_bgp_nexthop_info(rn
, NULL
);
100 static void *bgp_tip_hash_alloc(void *p
)
102 const struct in_addr
*val
= (const struct in_addr
*)p
;
103 struct tip_addr
*addr
;
105 addr
= XMALLOC(MTYPE_TIP_ADDR
, sizeof(struct tip_addr
));
107 addr
->addr
.s_addr
= val
->s_addr
;
112 static void bgp_tip_hash_free(void *addr
)
114 XFREE(MTYPE_TIP_ADDR
, addr
);
117 static unsigned int bgp_tip_hash_key_make(void *p
)
119 const struct tip_addr
*addr
= p
;
121 return jhash_1word(addr
->addr
.s_addr
, 0);
124 static bool bgp_tip_hash_cmp(const void *p1
, const void *p2
)
126 const struct tip_addr
*addr1
= p1
;
127 const struct tip_addr
*addr2
= p2
;
129 return addr1
->addr
.s_addr
== addr2
->addr
.s_addr
;
132 void bgp_tip_hash_init(struct bgp
*bgp
)
134 bgp
->tip_hash
= hash_create(bgp_tip_hash_key_make
, bgp_tip_hash_cmp
,
138 void bgp_tip_hash_destroy(struct bgp
*bgp
)
140 if (bgp
->tip_hash
== NULL
)
142 hash_clean(bgp
->tip_hash
, bgp_tip_hash_free
);
143 hash_free(bgp
->tip_hash
);
144 bgp
->tip_hash
= NULL
;
147 void bgp_tip_add(struct bgp
*bgp
, struct in_addr
*tip
)
150 struct tip_addr
*addr
;
154 addr
= hash_get(bgp
->tip_hash
, &tmp
, bgp_tip_hash_alloc
);
161 void bgp_tip_del(struct bgp
*bgp
, struct in_addr
*tip
)
164 struct tip_addr
*addr
;
168 addr
= hash_lookup(bgp
->tip_hash
, &tmp
);
169 /* may have been deleted earlier by bgp_interface_down() */
175 if (addr
->refcnt
== 0) {
176 hash_release(bgp
->tip_hash
, addr
);
177 XFREE(MTYPE_TIP_ADDR
, addr
);
181 /* BGP own address structure */
184 struct list
*ifp_name_list
;
187 static void show_address_entry(struct hash_backet
*backet
, void *args
)
189 struct vty
*vty
= (struct vty
*)args
;
190 struct bgp_addr
*addr
= (struct bgp_addr
*)backet
->data
;
192 struct listnode
*node
;
194 vty_out(vty
, "addr: %s, count: %d : ", inet_ntoa(addr
->addr
),
195 addr
->ifp_name_list
->count
);
197 for (ALL_LIST_ELEMENTS_RO(addr
->ifp_name_list
, node
, name
)) {
198 vty_out(vty
, " %s,", name
);
204 void bgp_nexthop_show_address_hash(struct vty
*vty
, struct bgp
*bgp
)
206 hash_iterate(bgp
->address_hash
,
207 (void (*)(struct hash_backet
*, void *))show_address_entry
,
211 static void bgp_address_hash_string_del(void *val
)
215 XFREE(MTYPE_MARTIAN_STRING
, data
);
218 static void *bgp_address_hash_alloc(void *p
)
220 const struct in_addr
*val
= (const struct in_addr
*)p
;
221 struct bgp_addr
*addr
;
223 addr
= XMALLOC(MTYPE_BGP_ADDR
, sizeof(struct bgp_addr
));
224 addr
->addr
.s_addr
= val
->s_addr
;
226 addr
->ifp_name_list
= list_new();
227 addr
->ifp_name_list
->del
= bgp_address_hash_string_del
;
232 static void bgp_address_hash_free(void *data
)
234 struct bgp_addr
*addr
= data
;
236 list_delete(&addr
->ifp_name_list
);
237 XFREE(MTYPE_BGP_ADDR
, addr
);
240 static unsigned int bgp_address_hash_key_make(void *p
)
242 const struct bgp_addr
*addr
= p
;
244 return jhash_1word(addr
->addr
.s_addr
, 0);
247 static bool bgp_address_hash_cmp(const void *p1
, const void *p2
)
249 const struct bgp_addr
*addr1
= p1
;
250 const struct bgp_addr
*addr2
= p2
;
252 return addr1
->addr
.s_addr
== addr2
->addr
.s_addr
;
255 void bgp_address_init(struct bgp
*bgp
)
258 hash_create(bgp_address_hash_key_make
, bgp_address_hash_cmp
,
262 void bgp_address_destroy(struct bgp
*bgp
)
264 if (bgp
->address_hash
== NULL
)
266 hash_clean(bgp
->address_hash
, bgp_address_hash_free
);
267 hash_free(bgp
->address_hash
);
268 bgp
->address_hash
= NULL
;
271 static void bgp_address_add(struct bgp
*bgp
, struct connected
*ifc
,
275 struct bgp_addr
*addr
;
276 struct listnode
*node
;
279 tmp
.addr
= p
->u
.prefix4
;
281 addr
= hash_get(bgp
->address_hash
, &tmp
, bgp_address_hash_alloc
);
283 for (ALL_LIST_ELEMENTS_RO(addr
->ifp_name_list
, node
, name
)) {
284 if (strcmp(ifc
->ifp
->name
, name
) == 0)
288 name
= XSTRDUP(MTYPE_MARTIAN_STRING
, ifc
->ifp
->name
);
289 listnode_add(addr
->ifp_name_list
, name
);
293 static void bgp_address_del(struct bgp
*bgp
, struct connected
*ifc
,
297 struct bgp_addr
*addr
;
298 struct listnode
*node
;
301 tmp
.addr
= p
->u
.prefix4
;
303 addr
= hash_lookup(bgp
->address_hash
, &tmp
);
304 /* may have been deleted earlier by bgp_interface_down() */
308 for (ALL_LIST_ELEMENTS_RO(addr
->ifp_name_list
, node
, name
)) {
309 if (strcmp(ifc
->ifp
->name
, name
) == 0)
314 list_delete_node(addr
->ifp_name_list
, node
);
315 XFREE(MTYPE_MARTIAN_STRING
, name
);
318 if (addr
->ifp_name_list
->count
== 0) {
319 hash_release(bgp
->address_hash
, addr
);
320 list_delete(&addr
->ifp_name_list
);
321 XFREE(MTYPE_BGP_ADDR
, addr
);
326 struct bgp_connected_ref
{
330 void bgp_connected_add(struct bgp
*bgp
, struct connected
*ifc
)
335 struct bgp_connected_ref
*bc
;
336 struct listnode
*node
, *nnode
;
341 p
= *(CONNECTED_PREFIX(ifc
));
342 if (addr
->family
== AF_INET
) {
343 apply_mask_ipv4((struct prefix_ipv4
*)&p
);
345 if (prefix_ipv4_any((struct prefix_ipv4
*)&p
))
348 bgp_address_add(bgp
, ifc
, addr
);
350 rn
= bgp_node_get(bgp
->connected_table
[AFI_IP
],
351 (struct prefix
*)&p
);
352 bc
= bgp_node_get_bgp_connected_ref_info(rn
);
356 bc
= XCALLOC(MTYPE_BGP_CONN
,
357 sizeof(struct bgp_connected_ref
));
359 bgp_node_set_bgp_connected_ref_info(rn
, bc
);
362 for (ALL_LIST_ELEMENTS(bgp
->peer
, node
, nnode
, peer
)) {
364 && (strcmp(peer
->conf_if
, ifc
->ifp
->name
) == 0)
365 && peer
->status
!= Established
366 && !CHECK_FLAG(peer
->flags
,
367 PEER_FLAG_IFPEER_V6ONLY
)) {
368 if (peer_active(peer
))
369 BGP_EVENT_ADD(peer
, BGP_Stop
);
370 BGP_EVENT_ADD(peer
, BGP_Start
);
373 } else if (addr
->family
== AF_INET6
) {
374 apply_mask_ipv6((struct prefix_ipv6
*)&p
);
376 if (IN6_IS_ADDR_UNSPECIFIED(&p
.u
.prefix6
))
379 if (IN6_IS_ADDR_LINKLOCAL(&p
.u
.prefix6
))
382 rn
= bgp_node_get(bgp
->connected_table
[AFI_IP6
],
383 (struct prefix
*)&p
);
385 bc
= bgp_node_get_bgp_connected_ref_info(rn
);
389 bc
= XCALLOC(MTYPE_BGP_CONN
,
390 sizeof(struct bgp_connected_ref
));
392 bgp_node_set_bgp_connected_ref_info(rn
, bc
);
397 void bgp_connected_delete(struct bgp
*bgp
, struct connected
*ifc
)
401 struct bgp_node
*rn
= NULL
;
402 struct bgp_connected_ref
*bc
;
406 p
= *(CONNECTED_PREFIX(ifc
));
408 if (addr
->family
== AF_INET
) {
409 if (prefix_ipv4_any((struct prefix_ipv4
*)&p
))
412 bgp_address_del(bgp
, ifc
, addr
);
414 rn
= bgp_node_lookup(bgp
->connected_table
[AFI_IP
], &p
);
415 } else if (addr
->family
== AF_INET6
) {
416 if (IN6_IS_ADDR_UNSPECIFIED(&p
.u
.prefix6
))
419 if (IN6_IS_ADDR_LINKLOCAL(&p
.u
.prefix6
))
422 rn
= bgp_node_lookup(bgp
->connected_table
[AFI_IP6
],
423 (struct prefix
*)&p
);
429 bc
= bgp_node_get_bgp_connected_ref_info(rn
);
431 if (bc
->refcnt
== 0) {
432 XFREE(MTYPE_BGP_CONN
, bc
);
433 bgp_node_set_bgp_connected_ref_info(rn
, NULL
);
439 static void bgp_connected_cleanup(struct route_table
*table
,
440 struct route_node
*rn
)
442 struct bgp_connected_ref
*bc
;
443 struct bgp_node
*bn
= bgp_node_from_rnode(rn
);
445 bc
= bgp_node_get_bgp_connected_ref_info(bn
);
450 if (bc
->refcnt
== 0) {
451 XFREE(MTYPE_BGP_CONN
, bc
);
452 bgp_node_set_bgp_connected_ref_info(bn
, NULL
);
456 int bgp_nexthop_self(struct bgp
*bgp
, struct in_addr nh_addr
)
458 struct bgp_addr tmp
, *addr
;
459 struct tip_addr tmp_tip
, *tip
;
463 addr
= hash_lookup(bgp
->address_hash
, &tmp
);
467 tmp_tip
.addr
= nh_addr
;
468 tip
= hash_lookup(bgp
->tip_hash
, &tmp_tip
);
475 int bgp_multiaccess_check_v4(struct in_addr nexthop
, struct peer
*peer
)
477 struct bgp_node
*rn1
;
478 struct bgp_node
*rn2
;
483 p
.prefixlen
= IPV4_MAX_BITLEN
;
484 p
.u
.prefix4
= nexthop
;
486 rn1
= bgp_node_match(peer
->bgp
->connected_table
[AFI_IP
], &p
);
491 p
.prefixlen
= IPV4_MAX_BITLEN
;
492 p
.u
.prefix4
= peer
->su
.sin
.sin_addr
;
494 rn2
= bgp_node_match(peer
->bgp
->connected_table
[AFI_IP
], &p
);
496 bgp_unlock_node(rn1
);
500 ret
= (rn1
== rn2
) ? 1 : 0;
502 bgp_unlock_node(rn1
);
503 bgp_unlock_node(rn2
);
508 int bgp_subgrp_multiaccess_check_v4(struct in_addr nexthop
,
509 struct update_subgroup
*subgrp
)
511 struct bgp_node
*rn1
, *rn2
;
517 np
.prefixlen
= IPV4_MAX_BITLEN
;
518 np
.u
.prefix4
= nexthop
;
521 p
.prefixlen
= IPV4_MAX_BITLEN
;
523 bgp
= SUBGRP_INST(subgrp
);
524 rn1
= bgp_node_match(bgp
->connected_table
[AFI_IP
], &np
);
528 SUBGRP_FOREACH_PEER (subgrp
, paf
) {
529 p
.u
.prefix4
= paf
->peer
->su
.sin
.sin_addr
;
531 rn2
= bgp_node_match(bgp
->connected_table
[AFI_IP
], &p
);
533 bgp_unlock_node(rn1
);
534 bgp_unlock_node(rn2
);
539 bgp_unlock_node(rn2
);
542 bgp_unlock_node(rn1
);
546 static void bgp_show_nexthops_detail(struct vty
*vty
, struct bgp
*bgp
,
547 struct bgp_nexthop_cache
*bnc
)
549 char buf
[PREFIX2STR_BUFFER
];
550 struct nexthop
*nexthop
;
552 for (nexthop
= bnc
->nexthop
; nexthop
; nexthop
= nexthop
->next
)
553 switch (nexthop
->type
) {
554 case NEXTHOP_TYPE_IPV6
:
555 vty_out(vty
, " gate %s\n",
556 inet_ntop(AF_INET6
, &nexthop
->gate
.ipv6
, buf
,
559 case NEXTHOP_TYPE_IPV6_IFINDEX
:
560 vty_out(vty
, " gate %s, if %s\n",
561 inet_ntop(AF_INET6
, &nexthop
->gate
.ipv6
, buf
,
563 ifindex2ifname(nexthop
->ifindex
, bgp
->vrf_id
));
565 case NEXTHOP_TYPE_IPV4
:
566 vty_out(vty
, " gate %s\n",
567 inet_ntop(AF_INET
, &nexthop
->gate
.ipv4
, buf
,
570 case NEXTHOP_TYPE_IFINDEX
:
571 vty_out(vty
, " if %s\n",
572 ifindex2ifname(nexthop
->ifindex
, bgp
->vrf_id
));
574 case NEXTHOP_TYPE_IPV4_IFINDEX
:
575 vty_out(vty
, " gate %s, if %s\n",
576 inet_ntop(AF_INET
, &nexthop
->gate
.ipv4
, buf
,
578 ifindex2ifname(nexthop
->ifindex
, bgp
->vrf_id
));
580 case NEXTHOP_TYPE_BLACKHOLE
:
581 vty_out(vty
, " blackhole\n");
584 vty_out(vty
, " invalid nexthop type %u\n",
589 static void bgp_show_nexthops(struct vty
*vty
, struct bgp
*bgp
, int detail
)
592 struct bgp_nexthop_cache
*bnc
;
593 char buf
[PREFIX2STR_BUFFER
];
597 vty_out(vty
, "Current BGP nexthop cache:\n");
598 for (afi
= AFI_IP
; afi
< AFI_MAX
; afi
++) {
599 if (!bgp
->nexthop_cache_table
[afi
])
602 for (rn
= bgp_table_top(bgp
->nexthop_cache_table
[afi
]); rn
;
603 rn
= bgp_route_next(rn
)) {
604 bnc
= bgp_node_get_bgp_nexthop_info(rn
);
608 if (CHECK_FLAG(bnc
->flags
, BGP_NEXTHOP_VALID
)) {
610 " %s valid [IGP metric %d], #paths %d\n",
611 inet_ntop(rn
->p
.family
,
612 &rn
->p
.u
.prefix
, buf
,
614 bnc
->metric
, bnc
->path_count
);
619 bgp_show_nexthops_detail(vty
, bgp
, bnc
);
622 vty_out(vty
, " %s invalid\n",
623 inet_ntop(rn
->p
.family
,
624 &rn
->p
.u
.prefix
, buf
,
626 if (CHECK_FLAG(bnc
->flags
,
627 BGP_NEXTHOP_CONNECTED
))
628 vty_out(vty
, " Must be Connected\n");
629 if (!CHECK_FLAG(bnc
->flags
,
630 BGP_NEXTHOP_REGISTERED
))
631 vty_out(vty
, " Is not Registered\n");
633 tbuf
= time(NULL
) - (bgp_clock() - bnc
->last_update
);
634 vty_out(vty
, " Last update: %s", ctime(&tbuf
));
640 static int show_ip_bgp_nexthop_table(struct vty
*vty
, const char *name
,
646 bgp
= bgp_lookup_by_name(name
);
648 bgp
= bgp_get_default();
650 vty_out(vty
, "%% No such BGP instance exist\n");
654 bgp_show_nexthops(vty
, bgp
, detail
);
659 static void bgp_show_all_instances_nexthops_vty(struct vty
*vty
)
661 struct listnode
*node
, *nnode
;
664 for (ALL_LIST_ELEMENTS(bm
->bgp
, node
, nnode
, bgp
)) {
665 vty_out(vty
, "\nInstance %s:\n",
666 (bgp
->inst_type
== BGP_INSTANCE_TYPE_DEFAULT
)
669 bgp_show_nexthops(vty
, bgp
, 0);
673 DEFUN (show_ip_bgp_nexthop
,
674 show_ip_bgp_nexthop_cmd
,
675 "show [ip] bgp [<view|vrf> VIEWVRFNAME] nexthop [detail]",
679 BGP_INSTANCE_HELP_STR
680 "BGP nexthop table\n"
681 "Show detailed information\n")
686 if (argv_find(argv
, argc
, "view", &idx
)
687 || argv_find(argv
, argc
, "vrf", &idx
))
688 vrf
= argv
[++idx
]->arg
;
689 int detail
= argv_find(argv
, argc
, "detail", &idx
) ? 1 : 0;
690 return show_ip_bgp_nexthop_table(vty
, vrf
, detail
);
693 DEFUN (show_ip_bgp_instance_all_nexthop
,
694 show_ip_bgp_instance_all_nexthop_cmd
,
695 "show [ip] bgp <view|vrf> all nexthop",
699 BGP_INSTANCE_ALL_HELP_STR
700 "BGP nexthop table\n")
702 bgp_show_all_instances_nexthops_vty(vty
);
706 void bgp_scan_init(struct bgp
*bgp
)
710 for (afi
= AFI_IP
; afi
< AFI_MAX
; afi
++) {
711 bgp
->nexthop_cache_table
[afi
] =
712 bgp_table_init(bgp
, afi
, SAFI_UNICAST
);
713 bgp
->connected_table
[afi
] = bgp_table_init(bgp
, afi
,
715 bgp
->import_check_table
[afi
] =
716 bgp_table_init(bgp
, afi
, SAFI_UNICAST
);
720 void bgp_scan_vty_init(void)
722 install_element(VIEW_NODE
, &show_ip_bgp_nexthop_cmd
);
723 install_element(VIEW_NODE
, &show_ip_bgp_instance_all_nexthop_cmd
);
726 void bgp_scan_finish(struct bgp
*bgp
)
730 for (afi
= AFI_IP
; afi
< AFI_MAX
; afi
++) {
731 /* Only the current one needs to be reset. */
732 bgp_nexthop_cache_reset(bgp
->nexthop_cache_table
[afi
]);
733 bgp_table_unlock(bgp
->nexthop_cache_table
[afi
]);
734 bgp
->nexthop_cache_table
[afi
] = NULL
;
736 bgp
->connected_table
[afi
]->route_table
->cleanup
=
737 bgp_connected_cleanup
;
738 bgp_table_unlock(bgp
->connected_table
[afi
]);
739 bgp
->connected_table
[afi
] = NULL
;
741 bgp_table_unlock(bgp
->import_check_table
[afi
]);
742 bgp
->import_check_table
[afi
] = NULL
;