2 * Router ID for zebra daemon.
4 * Copyright (C) 2004 James R. Leu
6 * This file is part of Quagga routing suite.
8 * Quagga is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2, or (at your option) any
13 * Quagga is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License along
19 * with this program; see the file COPYING; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
27 #include "sockunion.h"
32 #include "zebra_memory.h"
34 #include "connected.h"
41 #include "zebra/zserv.h"
42 #include "zebra/zapi_msg.h"
43 #include "zebra/zebra_vrf.h"
44 #include "zebra/router-id.h"
45 #include "zebra/redistribute.h"
47 /* master zebra server structure */
48 extern struct zebra_t zebrad
;
50 static struct connected
*router_id_find_node(struct list
*l
,
51 struct connected
*ifc
)
53 struct listnode
*node
;
56 for (ALL_LIST_ELEMENTS_RO(l
, node
, c
))
57 if (prefix_same(ifc
->address
, c
->address
))
63 static int router_id_bad_address(struct connected
*ifc
)
65 if (ifc
->address
->family
!= AF_INET
)
68 /* non-redistributable addresses shouldn't be used for RIDs either */
69 if (!zebra_check_addr(ifc
->address
))
75 void router_id_get(struct prefix
*p
, vrf_id_t vrf_id
)
77 struct listnode
*node
;
79 struct zebra_vrf
*zvrf
= vrf_info_get(vrf_id
);
81 p
->u
.prefix4
.s_addr
= 0;
85 if (zvrf
->rid_user_assigned
.u
.prefix4
.s_addr
)
86 p
->u
.prefix4
.s_addr
= zvrf
->rid_user_assigned
.u
.prefix4
.s_addr
;
87 else if (!list_isempty(zvrf
->rid_lo_sorted_list
)) {
88 node
= listtail(zvrf
->rid_lo_sorted_list
);
89 c
= listgetdata(node
);
90 p
->u
.prefix4
.s_addr
= c
->address
->u
.prefix4
.s_addr
;
91 } else if (!list_isempty(zvrf
->rid_all_sorted_list
)) {
92 node
= listtail(zvrf
->rid_all_sorted_list
);
93 c
= listgetdata(node
);
94 p
->u
.prefix4
.s_addr
= c
->address
->u
.prefix4
.s_addr
;
98 static void router_id_set(struct prefix
*p
, vrf_id_t vrf_id
)
101 struct listnode
*node
;
102 struct zserv
*client
;
103 struct zebra_vrf
*zvrf
;
105 if (p
->u
.prefix4
.s_addr
== 0) /* unset */
107 zvrf
= vrf_info_lookup(vrf_id
);
111 zvrf
= vrf_info_get(vrf_id
);
113 zvrf
->rid_user_assigned
.u
.prefix4
.s_addr
= p
->u
.prefix4
.s_addr
;
115 router_id_get(&p2
, vrf_id
);
117 for (ALL_LIST_ELEMENTS_RO(zebrad
.client_list
, node
, client
))
118 zsend_router_id_update(client
, &p2
, vrf_id
);
121 void router_id_add_address(struct connected
*ifc
)
123 struct list
*l
= NULL
;
124 struct listnode
*node
;
125 struct prefix before
;
127 struct zserv
*client
;
128 struct zebra_vrf
*zvrf
= vrf_info_get(ifc
->ifp
->vrf_id
);
130 if (router_id_bad_address(ifc
))
133 router_id_get(&before
, zvrf_id(zvrf
));
135 if (!strncmp(ifc
->ifp
->name
, "lo", 2)
136 || !strncmp(ifc
->ifp
->name
, "dummy", 5))
137 l
= zvrf
->rid_lo_sorted_list
;
139 l
= zvrf
->rid_all_sorted_list
;
141 if (!router_id_find_node(l
, ifc
))
142 listnode_add_sort(l
, ifc
);
144 router_id_get(&after
, zvrf_id(zvrf
));
146 if (prefix_same(&before
, &after
))
149 for (ALL_LIST_ELEMENTS_RO(zebrad
.client_list
, node
, client
))
150 zsend_router_id_update(client
, &after
, zvrf_id(zvrf
));
153 void router_id_del_address(struct connected
*ifc
)
158 struct prefix before
;
159 struct listnode
*node
;
160 struct zserv
*client
;
161 struct zebra_vrf
*zvrf
= vrf_info_get(ifc
->ifp
->vrf_id
);
163 if (router_id_bad_address(ifc
))
166 router_id_get(&before
, zvrf_id(zvrf
));
168 if (!strncmp(ifc
->ifp
->name
, "lo", 2)
169 || !strncmp(ifc
->ifp
->name
, "dummy", 5))
170 l
= zvrf
->rid_lo_sorted_list
;
172 l
= zvrf
->rid_all_sorted_list
;
174 if ((c
= router_id_find_node(l
, ifc
)))
175 listnode_delete(l
, c
);
177 router_id_get(&after
, zvrf_id(zvrf
));
179 if (prefix_same(&before
, &after
))
182 for (ALL_LIST_ELEMENTS_RO(zebrad
.client_list
, node
, client
))
183 zsend_router_id_update(client
, &after
, zvrf_id(zvrf
));
186 void router_id_write(struct vty
*vty
)
189 struct zebra_vrf
*zvrf
;
191 RB_FOREACH (vrf
, vrf_name_head
, &vrfs_by_name
)
192 if ((zvrf
= vrf
->info
) != NULL
)
193 if (zvrf
->rid_user_assigned
.u
.prefix4
.s_addr
) {
194 if (zvrf_id(zvrf
) == VRF_DEFAULT
)
195 vty_out(vty
, "router-id %s\n",
197 zvrf
->rid_user_assigned
200 vty_out(vty
, "router-id %s vrf %s\n",
202 zvrf
->rid_user_assigned
210 "router-id A.B.C.D [vrf NAME]",
211 "Manually set the router-id\n"
212 "IP address to use for router-id\n"
219 vrf_id_t vrf_id
= VRF_DEFAULT
;
221 rid
.u
.prefix4
.s_addr
= inet_addr(argv
[idx_ipv4
]->arg
);
222 if (!rid
.u
.prefix4
.s_addr
)
223 return CMD_WARNING_CONFIG_FAILED
;
226 rid
.family
= AF_INET
;
229 VRF_GET_ID(vrf_id
, argv
[idx_name
]->arg
, false);
231 router_id_set(&rid
, vrf_id
);
238 "no router-id [A.B.C.D [vrf NAME]]",
240 "Remove the manually configured router-id\n"
241 "IP address to use for router-id\n"
247 vrf_id_t vrf_id
= VRF_DEFAULT
;
249 rid
.u
.prefix4
.s_addr
= 0;
251 rid
.family
= AF_INET
;
254 VRF_GET_ID(vrf_id
, argv
[idx_name
]->arg
, false);
256 router_id_set(&rid
, vrf_id
);
262 static int router_id_cmp(void *a
, void *b
)
264 const struct connected
*ifa
= (const struct connected
*)a
;
265 const struct connected
*ifb
= (const struct connected
*)b
;
267 return IPV4_ADDR_CMP(&ifa
->address
->u
.prefix4
.s_addr
,
268 &ifb
->address
->u
.prefix4
.s_addr
);
271 void router_id_cmd_init(void)
273 install_element(CONFIG_NODE
, &router_id_cmd
);
274 install_element(CONFIG_NODE
, &no_router_id_cmd
);
277 void router_id_init(struct zebra_vrf
*zvrf
)
279 zvrf
->rid_all_sorted_list
= &zvrf
->_rid_all_sorted_list
;
280 zvrf
->rid_lo_sorted_list
= &zvrf
->_rid_lo_sorted_list
;
282 memset(zvrf
->rid_all_sorted_list
, 0,
283 sizeof(zvrf
->_rid_all_sorted_list
));
284 memset(zvrf
->rid_lo_sorted_list
, 0, sizeof(zvrf
->_rid_lo_sorted_list
));
285 memset(&zvrf
->rid_user_assigned
, 0, sizeof(zvrf
->rid_user_assigned
));
287 zvrf
->rid_all_sorted_list
->cmp
= router_id_cmp
;
288 zvrf
->rid_lo_sorted_list
->cmp
= router_id_cmp
;
290 zvrf
->rid_user_assigned
.family
= AF_INET
;
291 zvrf
->rid_user_assigned
.prefixlen
= 32;