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
22 #include <lib/nexthop.h>
23 #include <lib/memory.h>
24 #include <lib/srcdest_table.h>
28 #include <lib/memory.h>
30 #include "static_vrf.h"
31 #include "static_routes.h"
32 #include "static_memory.h"
33 #include "static_zebra.h"
35 /* Install static route into rib. */
36 static void static_install_route(struct route_node
*rn
,
37 struct static_route
*si_changed
, safi_t safi
)
39 struct static_route
*si
;
41 for (si
= rn
->info
; si
; si
= si
->next
)
42 static_zebra_nht_register(si
, true);
46 static_zebra_route_add(rn
, si_changed
, si
->vrf_id
, safi
, true);
50 /* Uninstall static route from RIB. */
51 static void static_uninstall_route(vrf_id_t vrf_id
, safi_t safi
,
52 struct route_node
*rn
,
53 struct static_route
*si_changed
)
57 static_zebra_route_add(rn
, si_changed
, vrf_id
, safi
, true);
59 static_zebra_route_add(rn
, si_changed
, vrf_id
, safi
, false);
62 int static_add_route(afi_t afi
, safi_t safi
, uint8_t type
, struct prefix
*p
,
63 struct prefix_ipv6
*src_p
, union g_addr
*gate
,
64 const char *ifname
, enum static_blackhole_type bh_type
,
65 route_tag_t tag
, uint8_t distance
, struct static_vrf
*svrf
,
66 struct static_vrf
*nh_svrf
,
67 struct static_nh_label
*snh_label
,
70 struct route_node
*rn
;
71 struct static_route
*si
;
72 struct static_route
*pp
;
73 struct static_route
*cp
;
74 struct static_route
*update
= NULL
;
75 struct route_table
*stable
= svrf
->stable
[afi
][safi
];
80 if (!gate
&& (type
== STATIC_IPV4_GATEWAY
81 || type
== STATIC_IPV4_GATEWAY_IFNAME
82 || type
== STATIC_IPV6_GATEWAY
83 || type
== STATIC_IPV6_GATEWAY_IFNAME
))
87 && (type
== STATIC_IFNAME
|| type
== STATIC_IPV4_GATEWAY_IFNAME
88 || type
== STATIC_IPV6_GATEWAY_IFNAME
))
91 /* Lookup static route prefix. */
92 rn
= srcdest_rnode_get(stable
, p
, src_p
);
94 /* Do nothing if there is a same static route. */
95 for (si
= rn
->info
; si
; si
= si
->next
) {
99 && IPV4_ADDR_SAME(&gate
->ipv4
, &si
->addr
.ipv4
))
101 && IPV6_ADDR_SAME(gate
, &si
->addr
.ipv6
))))
102 && (!strcmp(ifname
? ifname
: "", si
->ifname
))) {
103 if ((distance
== si
->distance
) && (tag
== si
->tag
)
104 && (table_id
== si
->table_id
)
105 && !memcmp(&si
->snh_label
, snh_label
,
106 sizeof(struct static_nh_label
))
107 && si
->bh_type
== bh_type
) {
108 route_unlock_node(rn
);
115 /* Distance or tag or label changed, delete existing first. */
117 static_delete_route(afi
, safi
, type
, p
, src_p
, gate
, ifname
,
118 update
->tag
, update
->distance
, svrf
,
119 &update
->snh_label
, table_id
);
121 /* Make new static route structure. */
122 si
= XCALLOC(MTYPE_STATIC_ROUTE
, sizeof(struct static_route
));
125 si
->distance
= distance
;
126 si
->bh_type
= bh_type
;
128 si
->vrf_id
= svrf
->vrf
->vrf_id
;
129 si
->nh_vrf_id
= nh_svrf
->vrf
->vrf_id
;
130 strcpy(si
->nh_vrfname
, nh_svrf
->vrf
->name
);
131 si
->table_id
= table_id
;
134 strlcpy(si
->ifname
, ifname
, sizeof(si
->ifname
));
135 si
->ifindex
= IFINDEX_INTERNAL
;
138 case STATIC_IPV4_GATEWAY
:
139 case STATIC_IPV4_GATEWAY_IFNAME
:
140 si
->addr
.ipv4
= gate
->ipv4
;
142 case STATIC_IPV6_GATEWAY
:
143 case STATIC_IPV6_GATEWAY_IFNAME
:
144 si
->addr
.ipv6
= gate
->ipv6
;
150 /* Save labels, if any. */
151 memcpy(&si
->snh_label
, snh_label
, sizeof(struct static_nh_label
));
154 * Add new static route information to the tree with sort by
155 * distance value and gateway address.
157 for (pp
= NULL
, cp
= rn
->info
; cp
; pp
= cp
, cp
= cp
->next
) {
158 if (si
->distance
< cp
->distance
)
160 if (si
->distance
> cp
->distance
)
162 if (si
->type
== STATIC_IPV4_GATEWAY
163 && cp
->type
== STATIC_IPV4_GATEWAY
) {
164 if (ntohl(si
->addr
.ipv4
.s_addr
)
165 < ntohl(cp
->addr
.ipv4
.s_addr
))
167 if (ntohl(si
->addr
.ipv4
.s_addr
)
168 > ntohl(cp
->addr
.ipv4
.s_addr
))
173 /* Make linked list. */
183 /* check whether interface exists in system & install if it does */
185 static_install_route(rn
, si
, safi
);
187 struct interface
*ifp
;
189 ifp
= if_lookup_by_name(ifname
, nh_svrf
->vrf
->vrf_id
);
190 if (ifp
&& ifp
->ifindex
!= IFINDEX_INTERNAL
) {
191 si
->ifindex
= ifp
->ifindex
;
192 static_install_route(rn
, si
, safi
);
194 zlog_warn("Static Route using %s interface not installed because the interface does not exist in specified vrf",
201 int static_delete_route(afi_t afi
, safi_t safi
, uint8_t type
, struct prefix
*p
,
202 struct prefix_ipv6
*src_p
, union g_addr
*gate
,
203 const char *ifname
, route_tag_t tag
, uint8_t distance
,
204 struct static_vrf
*svrf
,
205 struct static_nh_label
*snh_label
,
208 struct route_node
*rn
;
209 struct static_route
*si
;
210 struct route_table
*stable
;
213 stable
= static_vrf_static_table(afi
, safi
, svrf
);
217 /* Lookup static route prefix. */
218 rn
= srcdest_rnode_lookup(stable
, p
, src_p
);
222 /* Find same static route is the tree */
223 for (si
= rn
->info
; si
; si
= si
->next
)
227 && IPV4_ADDR_SAME(&gate
->ipv4
, &si
->addr
.ipv4
))
229 && IPV6_ADDR_SAME(gate
, &si
->addr
.ipv6
))))
230 && (!strcmp(ifname
? ifname
: "", si
->ifname
))
231 && (!tag
|| (tag
== si
->tag
))
232 && (table_id
== si
->table_id
)
233 && (!snh_label
->num_labels
234 || !memcmp(&si
->snh_label
, snh_label
,
235 sizeof(struct static_nh_label
))))
238 /* Can't find static route. */
240 route_unlock_node(rn
);
244 static_zebra_nht_register(si
, false);
246 /* Unlink static route from linked list. */
248 si
->prev
->next
= si
->next
;
252 si
->next
->prev
= si
->prev
;
255 * If we have other si nodes then route replace
256 * else delete the route
258 static_uninstall_route(si
->vrf_id
, safi
, rn
, si
);
259 route_unlock_node(rn
);
261 /* Free static route configuration. */
262 XFREE(MTYPE_STATIC_ROUTE
, si
);
264 route_unlock_node(rn
);
269 static void static_ifindex_update_af(struct interface
*ifp
, bool up
, afi_t afi
,
272 struct route_table
*stable
;
273 struct route_node
*rn
;
274 struct static_route
*si
;
277 RB_FOREACH (vrf
, vrf_name_head
, &vrfs_by_name
) {
278 struct static_vrf
*svrf
;
282 stable
= static_vrf_static_table(afi
, safi
, svrf
);
286 for (rn
= route_top(stable
); rn
; rn
= srcdest_route_next(rn
)) {
287 for (si
= rn
->info
; si
; si
= si
->next
) {
291 if (strcmp(si
->ifname
, ifp
->name
))
293 si
->ifindex
= ifp
->ifindex
;
295 if (si
->ifindex
!= ifp
->ifindex
)
297 si
->ifindex
= IFINDEX_INTERNAL
;
301 static_install_route(rn
, si
, safi
);
307 * This function looks at a svrf's stable and notices if any of the
308 * nexthops we are using are part of the vrf coming up.
309 * If we are using them then cleanup the nexthop vrf id
310 * to be the new value and then re-installs them
313 * stable -> The table we are looking at.
314 * svrf -> The newly changed vrf.
315 * afi -> The afi to look at
316 * safi -> the safi to look at
318 static void static_fixup_vrf(struct static_vrf
*svrf
,
319 struct route_table
*stable
, afi_t afi
, safi_t safi
)
321 struct route_node
*rn
;
322 struct static_route
*si
;
323 struct interface
*ifp
;
326 for (rn
= route_top(stable
); rn
; rn
= route_next(rn
)) {
328 for (si
= rn
->info
; si
; si
= si
->next
) {
329 if (strcmp(svrf
->vrf
->name
, si
->nh_vrfname
) != 0)
332 si
->nh_vrf_id
= svrf
->vrf
->vrf_id
;
335 ifp
= if_lookup_by_name(si
->ifname
,
338 si
->ifindex
= ifp
->ifindex
;
345 static_install_route(rn
, si
, safi
);
350 * This function enables static routes in a svrf as it
351 * is coming up. It sets the new vrf_id as appropriate.
353 * svrf -> The svrf that is being brought up and enabled by the kernel
354 * stable -> The stable we are looking at.
355 * afi -> the afi in question
356 * safi -> the safi in question
358 static void static_enable_vrf(struct static_vrf
*svrf
,
359 struct route_table
*stable
,
360 afi_t afi
, safi_t safi
)
362 struct route_node
*rn
;
363 struct static_route
*si
;
364 struct interface
*ifp
;
365 struct vrf
*vrf
= svrf
->vrf
;
368 for (rn
= route_top(stable
); rn
; rn
= route_next(rn
)) {
370 for (si
= rn
->info
; si
; si
= si
->next
) {
371 si
->vrf_id
= vrf
->vrf_id
;
373 ifp
= if_lookup_by_name(si
->ifname
,
376 si
->ifindex
= ifp
->ifindex
;
384 static_install_route(rn
, si
, safi
);
389 * When a vrf is being enabled by the kernel, go through all the
390 * static routes in the system that use this vrf (both nexthops vrfs
391 * and the routes vrf )
393 * enable_svrf -> the vrf being enabled
395 void static_fixup_vrf_ids(struct static_vrf
*enable_svrf
)
397 struct route_table
*stable
;
402 RB_FOREACH (vrf
, vrf_name_head
, &vrfs_by_name
) {
403 struct static_vrf
*svrf
;
406 /* Install any static routes configured for this VRF. */
407 for (afi
= AFI_IP
; afi
< AFI_MAX
; afi
++) {
408 for (safi
= SAFI_UNICAST
; safi
< SAFI_MAX
; safi
++) {
409 stable
= svrf
->stable
[afi
][safi
];
413 static_fixup_vrf(enable_svrf
, stable
,
416 if (enable_svrf
== svrf
)
417 static_enable_vrf(svrf
, stable
,
425 * Look at the specified stable and if any of the routes in
426 * this table are using the svrf as the nexthop, uninstall
429 * svrf -> the vrf being disabled
430 * stable -> the table we need to look at.
431 * afi -> the afi in question
432 * safi -> the safi in question
434 static void static_cleanup_vrf(struct static_vrf
*svrf
,
435 struct route_table
*stable
,
436 afi_t afi
, safi_t safi
)
438 struct route_node
*rn
;
439 struct static_route
*si
;
441 for (rn
= route_top(stable
); rn
; rn
= route_next(rn
)) {
442 for (si
= rn
->info
; si
; si
= si
->next
) {
443 if (strcmp(svrf
->vrf
->name
, si
->nh_vrfname
) != 0)
446 static_uninstall_route(si
->vrf_id
, safi
, rn
, si
);
452 * Look at all static routes in this table and uninstall
455 * stable -> The table to uninstall from
456 * afi -> The afi in question
457 * safi -> the safi in question
459 static void static_disable_vrf(struct route_table
*stable
,
460 afi_t afi
, safi_t safi
)
462 struct route_node
*rn
;
463 struct static_route
*si
;
465 for (rn
= route_top(stable
); rn
; rn
= route_next(rn
))
466 for (si
= rn
->info
; si
; si
= si
->next
)
467 static_uninstall_route(si
->vrf_id
, safi
, rn
, si
);
471 * When the disable_svrf is shutdown by the kernel, we call
472 * this function and it cleans up all static routes using
473 * this vrf as a nexthop as well as all static routes
476 * disable_svrf - The vrf being disabled
478 void static_cleanup_vrf_ids(struct static_vrf
*disable_svrf
)
484 RB_FOREACH (vrf
, vrf_name_head
, &vrfs_by_name
) {
485 struct static_vrf
*svrf
;
489 /* Uninstall any static routes configured for this VRF. */
490 for (afi
= AFI_IP
; afi
< AFI_MAX
; afi
++) {
491 for (safi
= SAFI_UNICAST
; safi
< SAFI_MAX
; safi
++) {
492 struct route_table
*stable
;
494 stable
= svrf
->stable
[afi
][safi
];
498 static_cleanup_vrf(disable_svrf
, stable
,
501 if (disable_svrf
== svrf
)
502 static_disable_vrf(stable
, afi
, safi
);
508 /* called from if_{add,delete}_update, i.e. when ifindex becomes [in]valid */
509 void static_ifindex_update(struct interface
*ifp
, bool up
)
511 static_ifindex_update_af(ifp
, up
, AFI_IP
, SAFI_UNICAST
);
512 static_ifindex_update_af(ifp
, up
, AFI_IP
, SAFI_MULTICAST
);
513 static_ifindex_update_af(ifp
, up
, AFI_IP6
, SAFI_UNICAST
);
514 static_ifindex_update_af(ifp
, up
, AFI_IP6
, SAFI_MULTICAST
);