2 * IS-IS Rout(e)ing protocol - isis_zebra.c
4 * Copyright (C) 2001,2002 Sampo Saaristo
5 * Tampere University of Technology
6 * Institute of Communications Engineering
7 * Copyright (C) 2013-2015 Christian Franke <chris@opensourcerouting.org>
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public Licenseas published by the Free
11 * Software Foundation; either version 2 of the License, or (at your option)
14 * This program is distributed in the hope that it will be useful,but WITHOUT
15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
19 * You should have received a copy of the GNU General Public License along
20 * with this program; see the file COPYING; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
30 #include "lib_errors.h"
41 #include "isisd/isis_constants.h"
42 #include "isisd/isis_common.h"
43 #include "isisd/isis_flags.h"
44 #include "isisd/isis_misc.h"
45 #include "isisd/isis_circuit.h"
46 #include "isisd/isisd.h"
47 #include "isisd/isis_circuit.h"
48 #include "isisd/isis_csm.h"
49 #include "isisd/isis_lsp.h"
50 #include "isisd/isis_route.h"
51 #include "isisd/isis_zebra.h"
52 #include "isisd/isis_te.h"
54 struct zclient
*zclient
= NULL
;
56 /* Router-id update message from zebra. */
57 static int isis_router_id_update_zebra(ZAPI_CALLBACK_ARGS
)
59 struct isis_area
*area
;
60 struct listnode
*node
;
61 struct prefix router_id
;
63 zebra_router_id_update_read(zclient
->ibuf
, &router_id
);
64 if (isis
->router_id
== router_id
.u
.prefix4
.s_addr
)
67 isis
->router_id
= router_id
.u
.prefix4
.s_addr
;
68 for (ALL_LIST_ELEMENTS_RO(isis
->area_list
, node
, area
))
69 if (listcount(area
->area_addrs
) > 0)
70 lsp_regenerate_schedule(area
, area
->is_type
, 0);
75 static int isis_zebra_if_add(ZAPI_CALLBACK_ARGS
)
77 struct interface
*ifp
;
79 ifp
= zebra_interface_add_read(zclient
->ibuf
, vrf_id
);
81 if (if_is_operative(ifp
))
82 isis_csm_state_change(IF_UP_FROM_Z
, circuit_scan_by_ifp(ifp
),
88 static int isis_zebra_if_del(ZAPI_CALLBACK_ARGS
)
90 struct interface
*ifp
;
94 ifp
= zebra_interface_state_read(s
, vrf_id
);
99 if (if_is_operative(ifp
))
100 zlog_warn("Zebra: got delete of %s, but interface is still up",
103 isis_csm_state_change(IF_DOWN_FROM_Z
, circuit_scan_by_ifp(ifp
), ifp
);
105 /* Cannot call if_delete because we should retain the pseudo interface
106 in case there is configuration info attached to it. */
107 if_delete_retain(ifp
);
109 if_set_index(ifp
, IFINDEX_INTERNAL
);
114 static int isis_zebra_if_state_up(ZAPI_CALLBACK_ARGS
)
116 struct interface
*ifp
;
118 ifp
= zebra_interface_state_read(zclient
->ibuf
, vrf_id
);
123 isis_csm_state_change(IF_UP_FROM_Z
, circuit_scan_by_ifp(ifp
), ifp
);
128 static int isis_zebra_if_state_down(ZAPI_CALLBACK_ARGS
)
130 struct interface
*ifp
;
131 struct isis_circuit
*circuit
;
133 ifp
= zebra_interface_state_read(zclient
->ibuf
, vrf_id
);
138 circuit
= isis_csm_state_change(IF_DOWN_FROM_Z
,
139 circuit_scan_by_ifp(ifp
), ifp
);
141 SET_FLAG(circuit
->flags
, ISIS_CIRCUIT_FLAPPED_AFTER_SPF
);
146 static int isis_zebra_if_address_add(ZAPI_CALLBACK_ARGS
)
150 char buf
[PREFIX2STR_BUFFER
];
152 c
= zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_ADD
,
153 zclient
->ibuf
, vrf_id
);
160 prefix2str(p
, buf
, sizeof(buf
));
162 if (p
->family
== AF_INET
)
163 zlog_debug("connected IP address %s", buf
);
164 if (p
->family
== AF_INET6
)
165 zlog_debug("connected IPv6 address %s", buf
);
166 #endif /* EXTREME_DEBUG */
167 if (if_is_operative(c
->ifp
))
168 isis_circuit_add_addr(circuit_scan_by_ifp(c
->ifp
), c
);
173 static int isis_zebra_if_address_del(ZAPI_CALLBACK_ARGS
)
176 struct interface
*ifp
;
179 char buf
[PREFIX2STR_BUFFER
];
180 #endif /* EXTREME_DEBUG */
182 c
= zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_DELETE
,
183 zclient
->ibuf
, vrf_id
);
192 prefix2str(p
, buf
, sizeof(buf
));
194 if (p
->family
== AF_INET
)
195 zlog_debug("disconnected IP address %s", buf
);
196 if (p
->family
== AF_INET6
)
197 zlog_debug("disconnected IPv6 address %s", buf
);
198 #endif /* EXTREME_DEBUG */
200 if (if_is_operative(ifp
))
201 isis_circuit_del_addr(circuit_scan_by_ifp(ifp
), c
);
207 static int isis_zebra_link_params(ZAPI_CALLBACK_ARGS
)
209 struct interface
*ifp
;
211 ifp
= zebra_interface_link_params_read(zclient
->ibuf
, vrf_id
);
217 isis_mpls_te_update(ifp
);
222 static void isis_zebra_route_add_route(struct prefix
*prefix
,
223 struct prefix_ipv6
*src_p
,
224 struct isis_route_info
*route_info
)
226 struct zapi_route api
;
227 struct zapi_nexthop
*api_nh
;
228 struct isis_nexthop
*nexthop
;
229 struct listnode
*node
;
232 if (CHECK_FLAG(route_info
->flag
, ISIS_ROUTE_FLAG_ZEBRA_SYNCED
))
235 memset(&api
, 0, sizeof(api
));
236 api
.vrf_id
= VRF_DEFAULT
;
237 api
.type
= PROTO_TYPE
;
238 api
.safi
= SAFI_UNICAST
;
239 api
.prefix
= *prefix
;
240 if (src_p
&& src_p
->prefixlen
) {
241 api
.src_prefix
= *src_p
;
242 SET_FLAG(api
.message
, ZAPI_MESSAGE_SRCPFX
);
244 SET_FLAG(api
.message
, ZAPI_MESSAGE_NEXTHOP
);
245 SET_FLAG(api
.message
, ZAPI_MESSAGE_METRIC
);
246 api
.metric
= route_info
->cost
;
248 SET_FLAG(api
.message
, ZAPI_MESSAGE_DISTANCE
);
249 api
.distance
= route_info
->depth
;
253 for (ALL_LIST_ELEMENTS_RO(route_info
->nexthops
, node
, nexthop
)) {
254 if (count
>= MULTIPATH_NUM
)
256 api_nh
= &api
.nexthops
[count
];
258 api_nh
->onlink
= true;
259 api_nh
->vrf_id
= VRF_DEFAULT
;
261 switch (nexthop
->family
) {
263 /* FIXME: can it be ? */
264 if (nexthop
->ip
.ipv4
.s_addr
!= INADDR_ANY
) {
265 api_nh
->type
= NEXTHOP_TYPE_IPV4_IFINDEX
;
266 api_nh
->gate
.ipv4
= nexthop
->ip
.ipv4
;
268 api_nh
->type
= NEXTHOP_TYPE_IFINDEX
;
272 if (!IN6_IS_ADDR_LINKLOCAL(&nexthop
->ip
.ipv6
)
273 && !IN6_IS_ADDR_UNSPECIFIED(&nexthop
->ip
.ipv6
)) {
276 api_nh
->gate
.ipv6
= nexthop
->ip
.ipv6
;
277 api_nh
->type
= NEXTHOP_TYPE_IPV6_IFINDEX
;
280 flog_err(EC_LIB_DEVELOPMENT
,
281 "%s: unknown address family [%d]", __func__
,
286 api_nh
->ifindex
= nexthop
->ifindex
;
292 api
.nexthop_num
= count
;
294 zclient_route_send(ZEBRA_ROUTE_ADD
, zclient
, &api
);
295 SET_FLAG(route_info
->flag
, ISIS_ROUTE_FLAG_ZEBRA_SYNCED
);
296 UNSET_FLAG(route_info
->flag
, ISIS_ROUTE_FLAG_ZEBRA_RESYNC
);
299 static void isis_zebra_route_del_route(struct prefix
*prefix
,
300 struct prefix_ipv6
*src_p
,
301 struct isis_route_info
*route_info
)
303 struct zapi_route api
;
305 if (!CHECK_FLAG(route_info
->flag
, ISIS_ROUTE_FLAG_ZEBRA_SYNCED
))
308 memset(&api
, 0, sizeof(api
));
309 api
.vrf_id
= VRF_DEFAULT
;
310 api
.type
= PROTO_TYPE
;
311 api
.safi
= SAFI_UNICAST
;
312 api
.prefix
= *prefix
;
313 if (src_p
&& src_p
->prefixlen
) {
314 api
.src_prefix
= *src_p
;
315 SET_FLAG(api
.message
, ZAPI_MESSAGE_SRCPFX
);
318 zclient_route_send(ZEBRA_ROUTE_DELETE
, zclient
, &api
);
319 UNSET_FLAG(route_info
->flag
, ISIS_ROUTE_FLAG_ZEBRA_SYNCED
);
322 void isis_zebra_route_update(struct prefix
*prefix
,
323 struct prefix_ipv6
*src_p
,
324 struct isis_route_info
*route_info
)
326 if (zclient
->sock
< 0)
329 if (CHECK_FLAG(route_info
->flag
, ISIS_ROUTE_FLAG_ACTIVE
))
330 isis_zebra_route_add_route(prefix
, src_p
, route_info
);
332 isis_zebra_route_del_route(prefix
, src_p
, route_info
);
335 static int isis_zebra_read(ZAPI_CALLBACK_ARGS
)
337 struct zapi_route api
;
339 if (zapi_route_decode(zclient
->ibuf
, &api
) < 0)
342 if (api
.prefix
.family
== AF_INET6
343 && IN6_IS_ADDR_LINKLOCAL(&api
.prefix
.u
.prefix6
))
347 * Avoid advertising a false default reachability. (A default
348 * route installed by IS-IS gets redistributed from zebra back
349 * into IS-IS causing us to start advertising default reachabity
350 * without this check)
352 if (api
.prefix
.prefixlen
== 0
353 && api
.src_prefix
.prefixlen
== 0
354 && api
.type
== PROTO_TYPE
) {
355 cmd
= ZEBRA_REDISTRIBUTE_ROUTE_DEL
;
358 if (cmd
== ZEBRA_REDISTRIBUTE_ROUTE_ADD
)
359 isis_redist_add(api
.type
, &api
.prefix
, &api
.src_prefix
,
360 api
.distance
, api
.metric
);
362 isis_redist_delete(api
.type
, &api
.prefix
, &api
.src_prefix
);
367 int isis_distribute_list_update(int routetype
)
372 void isis_zebra_redistribute_set(afi_t afi
, int type
)
374 if (type
== DEFAULT_ROUTE
)
375 zclient_redistribute_default(ZEBRA_REDISTRIBUTE_DEFAULT_ADD
,
376 zclient
, afi
, VRF_DEFAULT
);
378 zclient_redistribute(ZEBRA_REDISTRIBUTE_ADD
, zclient
, afi
, type
,
382 void isis_zebra_redistribute_unset(afi_t afi
, int type
)
384 if (type
== DEFAULT_ROUTE
)
385 zclient_redistribute_default(ZEBRA_REDISTRIBUTE_DEFAULT_DELETE
,
386 zclient
, afi
, VRF_DEFAULT
);
388 zclient_redistribute(ZEBRA_REDISTRIBUTE_DELETE
, zclient
, afi
,
389 type
, 0, VRF_DEFAULT
);
392 static void isis_zebra_connected(struct zclient
*zclient
)
394 zclient_send_reg_requests(zclient
, VRF_DEFAULT
);
397 void isis_zebra_init(struct thread_master
*master
)
399 zclient
= zclient_new(master
, &zclient_options_default
);
400 zclient_init(zclient
, PROTO_TYPE
, 0, &isisd_privs
);
401 zclient
->zebra_connected
= isis_zebra_connected
;
402 zclient
->router_id_update
= isis_router_id_update_zebra
;
403 zclient
->interface_add
= isis_zebra_if_add
;
404 zclient
->interface_delete
= isis_zebra_if_del
;
405 zclient
->interface_up
= isis_zebra_if_state_up
;
406 zclient
->interface_down
= isis_zebra_if_state_down
;
407 zclient
->interface_address_add
= isis_zebra_if_address_add
;
408 zclient
->interface_address_delete
= isis_zebra_if_address_del
;
409 zclient
->interface_link_params
= isis_zebra_link_params
;
410 zclient
->redistribute_route_add
= isis_zebra_read
;
411 zclient
->redistribute_route_del
= isis_zebra_read
;
416 void isis_zebra_stop(void)
418 zclient_stop(zclient
);
419 zclient_free(zclient
);