3 * Copyright (C) 2018 Cumulus Networks, Inc.
6 * This program 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 Free
8 * Software Foundation; either version 2 of the License, or (at your option)
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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
28 #include "srcdest_table.h"
36 #include "nexthop_group.h"
40 #include "static_vrf.h"
41 #include "static_routes.h"
42 #include "static_zebra.h"
43 #include "static_nht.h"
44 #include "static_vty.h"
48 /* Zebra structure to hold current status. */
49 struct zclient
*zclient
;
50 static struct hash
*static_nht_hash
;
52 /* Inteface addition message from zebra. */
53 static int static_ifp_create(struct interface
*ifp
)
55 static_ifindex_update(ifp
, true);
60 static int static_ifp_destroy(struct interface
*ifp
)
62 static_ifindex_update(ifp
, false);
66 static int interface_address_add(ZAPI_CALLBACK_ARGS
)
68 zebra_interface_address_read(cmd
, zclient
->ibuf
, vrf_id
);
73 static int interface_address_delete(ZAPI_CALLBACK_ARGS
)
77 c
= zebra_interface_address_read(cmd
, zclient
->ibuf
, vrf_id
);
86 static int static_ifp_up(struct interface
*ifp
)
89 struct static_vrf
*svrf
= static_vrf_lookup_by_id(ifp
->vrf_id
);
91 static_fixup_vrf_ids(svrf
);
92 static_config_install_delayed_routes(svrf
);
95 /* Install any static reliant on this interface coming up */
96 static_install_intf_nh(ifp
);
97 static_ifindex_update(ifp
, true);
102 static int static_ifp_down(struct interface
*ifp
)
104 static_ifindex_update(ifp
, false);
109 static int route_notify_owner(ZAPI_CALLBACK_ARGS
)
112 enum zapi_route_notify_owner note
;
114 char buf
[PREFIX_STRLEN
];
116 if (!zapi_route_notify_decode(zclient
->ibuf
, &p
, &table_id
, ¬e
))
119 prefix2str(&p
, buf
, sizeof(buf
));
122 case ZAPI_ROUTE_FAIL_INSTALL
:
123 static_nht_mark_state(&p
, vrf_id
, STATIC_NOT_INSTALLED
);
124 zlog_warn("%s: Route %s failed to install for table: %u",
125 __PRETTY_FUNCTION__
, buf
, table_id
);
127 case ZAPI_ROUTE_BETTER_ADMIN_WON
:
128 static_nht_mark_state(&p
, vrf_id
, STATIC_NOT_INSTALLED
);
129 zlog_warn("%s: Route %s over-ridden by better route for table: %u",
130 __PRETTY_FUNCTION__
, buf
, table_id
);
132 case ZAPI_ROUTE_INSTALLED
:
133 static_nht_mark_state(&p
, vrf_id
, STATIC_INSTALLED
);
135 case ZAPI_ROUTE_REMOVED
:
136 static_nht_mark_state(&p
, vrf_id
, STATIC_NOT_INSTALLED
);
138 case ZAPI_ROUTE_REMOVE_FAIL
:
139 static_nht_mark_state(&p
, vrf_id
, STATIC_INSTALLED
);
140 zlog_warn("%s: Route %s failure to remove for table: %u",
141 __PRETTY_FUNCTION__
, buf
, table_id
);
147 static void zebra_connected(struct zclient
*zclient
)
149 zclient_send_reg_requests(zclient
, VRF_DEFAULT
);
152 struct static_nht_data
{
161 /* API to check whether the configured nexthop address is
162 * one of its local connected address or not.
165 static_nexthop_is_local(vrf_id_t vrfid
, struct prefix
*addr
, int family
)
167 if (family
== AF_INET
) {
168 if (if_lookup_exact_address(&addr
->u
.prefix4
,
172 } else if (family
== AF_INET6
) {
173 if (if_lookup_exact_address(&addr
->u
.prefix6
,
180 static int static_zebra_nexthop_update(ZAPI_CALLBACK_ARGS
)
182 struct static_nht_data
*nhtd
, lookup
;
183 struct zapi_route nhr
;
186 if (!zapi_nexthop_update_decode(zclient
->ibuf
, &nhr
)) {
187 zlog_warn("Failure to decode nexthop update message");
191 if (nhr
.prefix
.family
== AF_INET6
)
194 if (nhr
.type
== ZEBRA_ROUTE_CONNECT
) {
195 if (static_nexthop_is_local(vrf_id
, &nhr
.prefix
,
200 memset(&lookup
, 0, sizeof(lookup
));
201 lookup
.nh
= &nhr
.prefix
;
202 lookup
.nh_vrf_id
= vrf_id
;
204 nhtd
= hash_lookup(static_nht_hash
, &lookup
);
207 nhtd
->nh_num
= nhr
.nexthop_num
;
209 static_nht_reset_start(&nhr
.prefix
, afi
, nhtd
->nh_vrf_id
);
210 static_nht_update(NULL
, &nhr
.prefix
, nhr
.nexthop_num
, afi
,
213 zlog_err("No nhtd?");
218 static void static_zebra_capabilities(struct zclient_capabilities
*cap
)
220 mpls_enabled
= cap
->mpls_enabled
;
223 static unsigned int static_nht_hash_key(const void *data
)
225 const struct static_nht_data
*nhtd
= data
;
226 unsigned int key
= 0;
228 key
= prefix_hash_key(nhtd
->nh
);
229 return jhash_1word(nhtd
->nh_vrf_id
, key
);
232 static bool static_nht_hash_cmp(const void *d1
, const void *d2
)
234 const struct static_nht_data
*nhtd1
= d1
;
235 const struct static_nht_data
*nhtd2
= d2
;
237 if (nhtd1
->nh_vrf_id
!= nhtd2
->nh_vrf_id
)
240 return prefix_same(nhtd1
->nh
, nhtd2
->nh
);
243 static void *static_nht_hash_alloc(void *data
)
245 struct static_nht_data
*copy
= data
;
246 struct static_nht_data
*new;
248 new = XMALLOC(MTYPE_TMP
, sizeof(*new));
250 new->nh
= prefix_new();
251 prefix_copy(new->nh
, copy
->nh
);
254 new->nh_vrf_id
= copy
->nh_vrf_id
;
259 static void static_nht_hash_free(void *data
)
261 struct static_nht_data
*nhtd
= data
;
263 prefix_free(&nhtd
->nh
);
264 XFREE(MTYPE_TMP
, nhtd
);
267 void static_zebra_nht_register(struct route_node
*rn
,
268 struct static_route
*si
, bool reg
)
270 struct static_nht_data
*nhtd
, lookup
;
276 ZEBRA_NEXTHOP_REGISTER
: ZEBRA_NEXTHOP_UNREGISTER
;
278 if (si
->nh_registered
&& reg
)
281 if (!si
->nh_registered
&& !reg
)
284 memset(&p
, 0, sizeof(p
));
287 case STATIC_BLACKHOLE
:
289 case STATIC_IPV4_GATEWAY
:
290 case STATIC_IPV4_GATEWAY_IFNAME
:
292 p
.prefixlen
= IPV4_MAX_BITLEN
;
293 p
.u
.prefix4
= si
->addr
.ipv4
;
296 case STATIC_IPV6_GATEWAY
:
297 case STATIC_IPV6_GATEWAY_IFNAME
:
299 p
.prefixlen
= IPV6_MAX_BITLEN
;
300 p
.u
.prefix6
= si
->addr
.ipv6
;
305 memset(&lookup
, 0, sizeof(lookup
));
307 lookup
.nh_vrf_id
= si
->nh_vrf_id
;
309 si
->nh_registered
= reg
;
312 nhtd
= hash_get(static_nht_hash
, &lookup
,
313 static_nht_hash_alloc
);
317 zlog_debug("Registered nexthop(%pFX) for %pRN %d", &p
,
319 if (nhtd
->refcount
> 1 && nhtd
->nh_num
) {
320 static_nht_update(&rn
->p
, nhtd
->nh
, nhtd
->nh_num
,
325 nhtd
= hash_lookup(static_nht_hash
, &lookup
);
330 if (nhtd
->refcount
>= 1)
333 hash_release(static_nht_hash
, nhtd
);
334 static_nht_hash_free(nhtd
);
337 if (zclient_send_rnh(zclient
, cmd
, &p
, false, si
->nh_vrf_id
) < 0)
338 zlog_warn("%s: Failure to send nexthop to zebra",
339 __PRETTY_FUNCTION__
);
342 extern void static_zebra_route_add(struct route_node
*rn
,
343 struct static_route
*si_changed
,
344 vrf_id_t vrf_id
, safi_t safi
, bool install
)
346 struct static_route
*si
= rn
->info
;
347 const struct prefix
*p
, *src_pp
;
348 struct zapi_nexthop
*api_nh
;
349 struct zapi_route api
;
353 srcdest_rnode_prefixes(rn
, &p
, &src_pp
);
355 memset(&api
, 0, sizeof(api
));
357 api
.type
= ZEBRA_ROUTE_STATIC
;
359 memcpy(&api
.prefix
, p
, sizeof(api
.prefix
));
362 SET_FLAG(api
.message
, ZAPI_MESSAGE_SRCPFX
);
363 memcpy(&api
.src_prefix
, src_pp
, sizeof(api
.src_prefix
));
365 SET_FLAG(api
.flags
, ZEBRA_FLAG_RR_USE_DISTANCE
);
366 SET_FLAG(api
.message
, ZAPI_MESSAGE_NEXTHOP
);
367 if (si_changed
->distance
) {
368 SET_FLAG(api
.message
, ZAPI_MESSAGE_DISTANCE
);
369 api
.distance
= si_changed
->distance
;
371 if (si_changed
->tag
) {
372 SET_FLAG(api
.message
, ZAPI_MESSAGE_TAG
);
373 api
.tag
= si_changed
->tag
;
375 if (si_changed
->table_id
!= 0) {
376 SET_FLAG(api
.message
, ZAPI_MESSAGE_TABLEID
);
377 api
.tableid
= si_changed
->table_id
;
379 for (/*loaded above*/; si
; si
= si
->next
) {
380 api_nh
= &api
.nexthops
[nh_num
];
381 if (si
->nh_vrf_id
== VRF_UNKNOWN
)
384 if (si
->distance
!= si_changed
->distance
)
387 if (si
->table_id
!= si_changed
->table_id
)
390 api_nh
->vrf_id
= si
->nh_vrf_id
;
391 api_nh
->onlink
= si
->onlink
;
393 si
->state
= STATIC_SENT_TO_ZEBRA
;
397 if (si
->ifindex
== IFINDEX_INTERNAL
)
399 api_nh
->ifindex
= si
->ifindex
;
400 api_nh
->type
= NEXTHOP_TYPE_IFINDEX
;
402 case STATIC_IPV4_GATEWAY
:
405 api_nh
->type
= NEXTHOP_TYPE_IPV4
;
406 api_nh
->gate
= si
->addr
;
408 case STATIC_IPV4_GATEWAY_IFNAME
:
409 if (si
->ifindex
== IFINDEX_INTERNAL
)
411 api_nh
->ifindex
= si
->ifindex
;
412 api_nh
->type
= NEXTHOP_TYPE_IPV4_IFINDEX
;
413 api_nh
->gate
= si
->addr
;
415 case STATIC_IPV6_GATEWAY
:
418 api_nh
->type
= NEXTHOP_TYPE_IPV6
;
419 api_nh
->gate
= si
->addr
;
421 case STATIC_IPV6_GATEWAY_IFNAME
:
422 if (si
->ifindex
== IFINDEX_INTERNAL
)
424 api_nh
->type
= NEXTHOP_TYPE_IPV6_IFINDEX
;
425 api_nh
->ifindex
= si
->ifindex
;
426 api_nh
->gate
= si
->addr
;
428 case STATIC_BLACKHOLE
:
429 api_nh
->type
= NEXTHOP_TYPE_BLACKHOLE
;
430 switch (si
->bh_type
) {
431 case STATIC_BLACKHOLE_DROP
:
432 case STATIC_BLACKHOLE_NULL
:
433 api_nh
->bh_type
= BLACKHOLE_NULL
;
435 case STATIC_BLACKHOLE_REJECT
:
436 api_nh
->bh_type
= BLACKHOLE_REJECT
;
441 if (si
->snh_label
.num_labels
) {
444 SET_FLAG(api
.message
, ZAPI_MESSAGE_LABEL
);
445 api_nh
->label_num
= si
->snh_label
.num_labels
;
446 for (i
= 0; i
< api_nh
->label_num
; i
++)
447 api_nh
->labels
[i
] = si
->snh_label
.label
[i
];
452 api
.nexthop_num
= nh_num
;
455 * If we have been given an install but nothing is valid
456 * go ahead and delete the route for double plus fun
458 if (!nh_num
&& install
)
461 zclient_route_send(install
?
462 ZEBRA_ROUTE_ADD
: ZEBRA_ROUTE_DELETE
,
466 void static_zebra_init(void)
468 struct zclient_options opt
= { .receive_notify
= true };
470 if_zapi_callbacks(static_ifp_create
, static_ifp_up
,
471 static_ifp_down
, static_ifp_destroy
);
473 zclient
= zclient_new(master
, &opt
);
475 zclient_init(zclient
, ZEBRA_ROUTE_STATIC
, 0, &static_privs
);
476 zclient
->zebra_capabilities
= static_zebra_capabilities
;
477 zclient
->zebra_connected
= zebra_connected
;
478 zclient
->interface_address_add
= interface_address_add
;
479 zclient
->interface_address_delete
= interface_address_delete
;
480 zclient
->route_notify_owner
= route_notify_owner
;
481 zclient
->nexthop_update
= static_zebra_nexthop_update
;
483 static_nht_hash
= hash_create(static_nht_hash_key
,
485 "Static Nexthop Tracking hash");
488 void static_zebra_vrf_register(struct vrf
*vrf
)
490 if (vrf
->vrf_id
== VRF_DEFAULT
)
492 zclient_send_reg_requests(zclient
, vrf
->vrf_id
);
495 void static_zebra_vrf_unregister(struct vrf
*vrf
)
497 if (vrf
->vrf_id
== VRF_DEFAULT
)
499 zclient_send_dereg_requests(zclient
, vrf
->vrf_id
);