2 * Zebra connect library for EIGRP.
3 * Copyright (C) 2013-2014
11 * This file is part of GNU Zebra.
13 * GNU Zebra is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2, or (at your option) any
18 * GNU Zebra is distributed in the hope that it will be useful, but
19 * WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 * General Public License for more details.
23 * You should have received a copy of the GNU General Public License along
24 * with this program; see the file COPYING; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
44 #include "eigrpd/eigrp_structs.h"
45 #include "eigrpd/eigrpd.h"
46 #include "eigrpd/eigrp_interface.h"
47 #include "eigrpd/eigrp_neighbor.h"
48 #include "eigrpd/eigrp_packet.h"
49 #include "eigrpd/eigrp_zebra.h"
50 #include "eigrpd/eigrp_vty.h"
51 #include "eigrpd/eigrp_dump.h"
52 #include "eigrpd/eigrp_network.h"
53 #include "eigrpd/eigrp_topology.h"
54 #include "eigrpd/eigrp_fsm.h"
56 static int eigrp_interface_add(int, struct zclient
*, zebra_size_t
, vrf_id_t
);
57 static int eigrp_interface_delete(int, struct zclient
*, zebra_size_t
,
59 static int eigrp_interface_address_add(int, struct zclient
*, zebra_size_t
,
61 static int eigrp_interface_address_delete(int, struct zclient
*, zebra_size_t
,
63 static int eigrp_interface_state_up(int, struct zclient
*, zebra_size_t
,
65 static int eigrp_interface_state_down(int, struct zclient
*, zebra_size_t
,
67 static struct interface
*zebra_interface_if_lookup(struct stream
*);
69 static int eigrp_zebra_read_route(int, struct zclient
*, zebra_size_t
,
72 /* Zebra structure to hold current status. */
73 struct zclient
*zclient
= NULL
;
75 /* For registering threads. */
76 extern struct thread_master
*master
;
77 struct in_addr router_id_zebra
;
79 /* Router-id update message from zebra. */
80 static int eigrp_router_id_update_zebra(int command
, struct zclient
*zclient
,
81 zebra_size_t length
, vrf_id_t vrf_id
)
84 struct prefix router_id
;
85 zebra_router_id_update_read(zclient
->ibuf
, &router_id
);
87 router_id_zebra
= router_id
.u
.prefix4
;
89 eigrp
= eigrp_lookup();
92 eigrp_router_id_update(eigrp
);
97 static void eigrp_zebra_connected(struct zclient
*zclient
)
99 zclient_send_reg_requests(zclient
, VRF_DEFAULT
);
102 void eigrp_zebra_init(void)
104 zclient
= zclient_new(master
);
106 zclient_init(zclient
, ZEBRA_ROUTE_EIGRP
, 0);
107 zclient
->zebra_connected
= eigrp_zebra_connected
;
108 zclient
->router_id_update
= eigrp_router_id_update_zebra
;
109 zclient
->interface_add
= eigrp_interface_add
;
110 zclient
->interface_delete
= eigrp_interface_delete
;
111 zclient
->interface_up
= eigrp_interface_state_up
;
112 zclient
->interface_down
= eigrp_interface_state_down
;
113 zclient
->interface_address_add
= eigrp_interface_address_add
;
114 zclient
->interface_address_delete
= eigrp_interface_address_delete
;
115 zclient
->redistribute_route_add
= eigrp_zebra_read_route
;
116 zclient
->redistribute_route_del
= eigrp_zebra_read_route
;
120 /* Zebra route add and delete treatment. */
121 static int eigrp_zebra_read_route(int command
, struct zclient
*zclient
,
122 zebra_size_t length
, vrf_id_t vrf_id
)
124 struct zapi_route api
;
127 if (zapi_route_decode(zclient
->ibuf
, &api
) < 0)
130 if (IPV4_NET127(ntohl(api
.prefix
.u
.prefix4
.s_addr
)))
133 eigrp
= eigrp_lookup();
137 if (command
== ZEBRA_REDISTRIBUTE_ROUTE_ADD
) {
139 } else /* if (command == ZEBRA_REDISTRIBUTE_ROUTE_DEL) */
146 /* Inteface addition message from zebra. */
147 static int eigrp_interface_add(int command
, struct zclient
*zclient
,
148 zebra_size_t length
, vrf_id_t vrf_id
)
150 struct interface
*ifp
;
151 struct eigrp_interface
*ei
;
153 ifp
= zebra_interface_add_read(zclient
->ibuf
, vrf_id
);
160 ei
->params
.type
= eigrp_default_iftype(ifp
);
162 eigrp_if_update(ifp
);
167 static int eigrp_interface_delete(int command
, struct zclient
*zclient
,
168 zebra_size_t length
, vrf_id_t vrf_id
)
170 struct interface
*ifp
;
174 /* zebra_interface_state_read () updates interface structure in iflist
176 ifp
= zebra_interface_state_read(s
, vrf_id
);
182 zlog_warn("Zebra: got delete of %s, but interface is still up",
185 if (IS_DEBUG_EIGRP(zebra
, ZEBRA_INTERFACE
))
187 "Zebra: interface delete %s index %d flags %llx metric %d mtu %d",
188 ifp
->name
, ifp
->ifindex
, (unsigned long long)ifp
->flags
,
189 ifp
->metric
, ifp
->mtu
);
192 eigrp_if_free(ifp
->info
,
193 INTERFACE_DOWN_BY_ZEBRA
);
198 static int eigrp_interface_address_add(int command
, struct zclient
*zclient
,
199 zebra_size_t length
, vrf_id_t vrf_id
)
203 c
= zebra_interface_address_read(command
, zclient
->ibuf
, vrf_id
);
208 if (IS_DEBUG_EIGRP(zebra
, ZEBRA_INTERFACE
)) {
210 prefix2str(c
->address
, buf
, sizeof(buf
));
211 zlog_debug("Zebra: interface %s address add %s", c
->ifp
->name
,
215 eigrp_if_update(c
->ifp
);
220 static int eigrp_interface_address_delete(int command
, struct zclient
*zclient
,
221 zebra_size_t length
, vrf_id_t vrf_id
)
224 struct interface
*ifp
;
225 struct eigrp_interface
*ei
;
227 c
= zebra_interface_address_read(command
, zclient
->ibuf
, vrf_id
);
232 if (IS_DEBUG_EIGRP(zebra
, ZEBRA_INTERFACE
)) {
234 prefix2str(c
->address
, buf
, sizeof(buf
));
235 zlog_debug("Zebra: interface %s address delete %s",
244 /* Call interface hook functions to clean up */
245 eigrp_if_free(ei
, INTERFACE_DOWN_BY_ZEBRA
);
252 static int eigrp_interface_state_up(int command
, struct zclient
*zclient
,
253 zebra_size_t length
, vrf_id_t vrf_id
)
255 struct interface
*ifp
;
257 ifp
= zebra_interface_if_lookup(zclient
->ibuf
);
262 /* Interface is already up. */
263 if (if_is_operative(ifp
)) {
264 /* Temporarily keep ifp values. */
265 struct interface if_tmp
;
266 memcpy(&if_tmp
, ifp
, sizeof(struct interface
));
268 zebra_interface_if_set_value(zclient
->ibuf
, ifp
);
270 if (IS_DEBUG_EIGRP(zebra
, ZEBRA_INTERFACE
))
271 zlog_debug("Zebra: Interface[%s] state update.",
274 if (if_tmp
.bandwidth
!= ifp
->bandwidth
) {
275 if (IS_DEBUG_EIGRP(zebra
, ZEBRA_INTERFACE
))
277 "Zebra: Interface[%s] bandwidth change %d -> %d.",
278 ifp
->name
, if_tmp
.bandwidth
,
281 // eigrp_if_recalculate_output_cost (ifp);
284 if (if_tmp
.mtu
!= ifp
->mtu
) {
285 if (IS_DEBUG_EIGRP(zebra
, ZEBRA_INTERFACE
))
287 "Zebra: Interface[%s] MTU change %u -> %u.",
288 ifp
->name
, if_tmp
.mtu
, ifp
->mtu
);
290 /* Must reset the interface (simulate down/up) when MTU
297 zebra_interface_if_set_value(zclient
->ibuf
, ifp
);
299 if (IS_DEBUG_EIGRP(zebra
, ZEBRA_INTERFACE
))
300 zlog_debug("Zebra: Interface[%s] state change to up.",
304 eigrp_if_up(ifp
->info
);
309 static int eigrp_interface_state_down(int command
, struct zclient
*zclient
,
310 zebra_size_t length
, vrf_id_t vrf_id
)
312 struct interface
*ifp
;
314 ifp
= zebra_interface_state_read(zclient
->ibuf
, vrf_id
);
319 if (IS_DEBUG_EIGRP(zebra
, ZEBRA_INTERFACE
))
320 zlog_debug("Zebra: Interface[%s] state change to down.",
324 eigrp_if_down(ifp
->info
);
329 static struct interface
*zebra_interface_if_lookup(struct stream
*s
)
331 char ifname_tmp
[INTERFACE_NAMSIZ
];
333 /* Read interface name. */
334 stream_get(ifname_tmp
, s
, INTERFACE_NAMSIZ
);
336 /* And look it up. */
337 return if_lookup_by_name(ifname_tmp
, VRF_DEFAULT
);
340 void eigrp_zebra_route_add(struct prefix
*p
, struct list
*successors
)
342 struct zapi_route api
;
343 struct zapi_nexthop
*api_nh
;
344 struct eigrp_nexthop_entry
*te
;
345 struct listnode
*node
;
348 if (!zclient
->redist
[AFI_IP
][ZEBRA_ROUTE_EIGRP
])
351 memset(&api
, 0, sizeof(api
));
352 api
.vrf_id
= VRF_DEFAULT
;
353 api
.type
= ZEBRA_ROUTE_EIGRP
;
354 api
.safi
= SAFI_UNICAST
;
355 memcpy(&api
.prefix
, p
, sizeof(*p
));
357 SET_FLAG(api
.message
, ZAPI_MESSAGE_NEXTHOP
);
359 /* Nexthop, ifindex, distance and metric information. */
360 for (ALL_LIST_ELEMENTS_RO(successors
, node
, te
)) {
361 if (count
>= MULTIPATH_NUM
)
363 api_nh
= &api
.nexthops
[count
];
364 if (te
->adv_router
->src
.s_addr
) {
365 api_nh
->gate
.ipv4
= te
->adv_router
->src
;
366 api_nh
->type
= NEXTHOP_TYPE_IPV4_IFINDEX
;
368 api_nh
->type
= NEXTHOP_TYPE_IFINDEX
;
369 api_nh
->ifindex
= te
->ei
->ifp
->ifindex
;
373 api
.nexthop_num
= count
;
375 if (IS_DEBUG_EIGRP(zebra
, ZEBRA_REDISTRIBUTE
)) {
376 char buf
[2][PREFIX_STRLEN
];
377 zlog_debug("Zebra: Route add %s nexthop %s",
378 prefix2str(p
, buf
[0], PREFIX_STRLEN
),
379 inet_ntop(AF_INET
, 0, buf
[1], PREFIX_STRLEN
));
382 zclient_route_send(ZEBRA_ROUTE_ADD
, zclient
, &api
);
385 void eigrp_zebra_route_delete(struct prefix
*p
)
387 struct zapi_route api
;
389 if (!zclient
->redist
[AFI_IP
][ZEBRA_ROUTE_EIGRP
])
392 memset(&api
, 0, sizeof(api
));
393 api
.vrf_id
= VRF_DEFAULT
;
394 api
.type
= ZEBRA_ROUTE_EIGRP
;
395 api
.safi
= SAFI_UNICAST
;
396 memcpy(&api
.prefix
, p
, sizeof(*p
));
397 zclient_route_send(ZEBRA_ROUTE_DELETE
, zclient
, &api
);
399 if (IS_DEBUG_EIGRP(zebra
, ZEBRA_REDISTRIBUTE
)) {
400 char buf
[PREFIX_STRLEN
];
401 zlog_debug("Zebra: Route del %s",
402 prefix2str(p
, buf
, PREFIX_STRLEN
));
408 int eigrp_is_type_redistributed(int type
)
410 return ((DEFAULT_ROUTE_TYPE(type
))
411 ? vrf_bitmap_check(zclient
->default_information
,
413 : vrf_bitmap_check(zclient
->redist
[AFI_IP
][type
],
417 int eigrp_redistribute_set(struct eigrp
*eigrp
, int type
,
418 struct eigrp_metrics metric
)
421 if (eigrp_is_type_redistributed(type
)) {
422 if (eigrp_metrics_is_same(metric
, eigrp
->dmetric
[type
])) {
423 eigrp
->dmetric
[type
] = metric
;
426 eigrp_external_routes_refresh(eigrp
, type
);
428 // if (IS_DEBUG_EIGRP(zebra, ZEBRA_REDISTRIBUTE))
429 // zlog_debug ("Redistribute[%s]: Refresh Type[%d],
431 // eigrp_redist_string(type),
432 // metric_type (eigrp, type), metric_value
437 eigrp
->dmetric
[type
] = metric
;
439 zclient_redistribute(ZEBRA_REDISTRIBUTE_ADD
, zclient
, AFI_IP
, type
, 0,
442 ++eigrp
->redistribute
;
447 int eigrp_redistribute_unset(struct eigrp
*eigrp
, int type
)
450 if (eigrp_is_type_redistributed(type
)) {
451 memset(&eigrp
->dmetric
[type
], 0, sizeof(struct eigrp_metrics
));
452 zclient_redistribute(ZEBRA_REDISTRIBUTE_DELETE
, zclient
, AFI_IP
,
453 type
, 0, VRF_DEFAULT
);
454 --eigrp
->redistribute
;