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/zebra_vrf.h"
43 #include "zebra/router-id.h"
44 #include "zebra/redistribute.h"
46 /* master zebra server structure */
47 extern struct zebra_t zebrad
;
49 static struct connected
*router_id_find_node(struct list
*l
,
50 struct connected
*ifc
)
52 struct listnode
*node
;
55 for (ALL_LIST_ELEMENTS_RO(l
, node
, c
))
56 if (prefix_same(ifc
->address
, c
->address
))
62 static int router_id_bad_address(struct connected
*ifc
)
64 if (ifc
->address
->family
!= AF_INET
)
67 /* non-redistributable addresses shouldn't be used for RIDs either */
68 if (!zebra_check_addr(ifc
->address
))
74 void router_id_get(struct prefix
*p
, vrf_id_t vrf_id
)
76 struct listnode
*node
;
78 struct zebra_vrf
*zvrf
= vrf_info_get(vrf_id
);
80 p
->u
.prefix4
.s_addr
= 0;
84 if (zvrf
->rid_user_assigned
.u
.prefix4
.s_addr
)
85 p
->u
.prefix4
.s_addr
= zvrf
->rid_user_assigned
.u
.prefix4
.s_addr
;
86 else if (!list_isempty(zvrf
->rid_lo_sorted_list
)) {
87 node
= listtail(zvrf
->rid_lo_sorted_list
);
88 c
= listgetdata(node
);
89 p
->u
.prefix4
.s_addr
= c
->address
->u
.prefix4
.s_addr
;
90 } else if (!list_isempty(zvrf
->rid_all_sorted_list
)) {
91 node
= listtail(zvrf
->rid_all_sorted_list
);
92 c
= listgetdata(node
);
93 p
->u
.prefix4
.s_addr
= c
->address
->u
.prefix4
.s_addr
;
97 static void router_id_set(struct prefix
*p
, vrf_id_t vrf_id
)
100 struct listnode
*node
;
101 struct zserv
*client
;
102 struct zebra_vrf
*zvrf
;
104 if (p
->u
.prefix4
.s_addr
== 0) /* unset */
106 zvrf
= vrf_info_lookup(vrf_id
);
110 zvrf
= vrf_info_get(vrf_id
);
112 zvrf
->rid_user_assigned
.u
.prefix4
.s_addr
= p
->u
.prefix4
.s_addr
;
114 router_id_get(&p2
, vrf_id
);
116 for (ALL_LIST_ELEMENTS_RO(zebrad
.client_list
, node
, client
))
117 zsend_router_id_update(client
, &p2
, vrf_id
);
120 void router_id_add_address(struct connected
*ifc
)
122 struct list
*l
= NULL
;
123 struct listnode
*node
;
124 struct prefix before
;
126 struct zserv
*client
;
127 struct zebra_vrf
*zvrf
= vrf_info_get(ifc
->ifp
->vrf_id
);
129 if (router_id_bad_address(ifc
))
132 router_id_get(&before
, zvrf_id(zvrf
));
134 if (!strncmp(ifc
->ifp
->name
, "lo", 2)
135 || !strncmp(ifc
->ifp
->name
, "dummy", 5))
136 l
= zvrf
->rid_lo_sorted_list
;
138 l
= zvrf
->rid_all_sorted_list
;
140 if (!router_id_find_node(l
, ifc
))
141 listnode_add_sort(l
, ifc
);
143 router_id_get(&after
, zvrf_id(zvrf
));
145 if (prefix_same(&before
, &after
))
148 for (ALL_LIST_ELEMENTS_RO(zebrad
.client_list
, node
, client
))
149 zsend_router_id_update(client
, &after
, zvrf_id(zvrf
));
152 void router_id_del_address(struct connected
*ifc
)
157 struct prefix before
;
158 struct listnode
*node
;
159 struct zserv
*client
;
160 struct zebra_vrf
*zvrf
= vrf_info_get(ifc
->ifp
->vrf_id
);
162 if (router_id_bad_address(ifc
))
165 router_id_get(&before
, zvrf_id(zvrf
));
167 if (!strncmp(ifc
->ifp
->name
, "lo", 2)
168 || !strncmp(ifc
->ifp
->name
, "dummy", 5))
169 l
= zvrf
->rid_lo_sorted_list
;
171 l
= zvrf
->rid_all_sorted_list
;
173 if ((c
= router_id_find_node(l
, ifc
)))
174 listnode_delete(l
, c
);
176 router_id_get(&after
, zvrf_id(zvrf
));
178 if (prefix_same(&before
, &after
))
181 for (ALL_LIST_ELEMENTS_RO(zebrad
.client_list
, node
, client
))
182 zsend_router_id_update(client
, &after
, zvrf_id(zvrf
));
185 void router_id_write(struct vty
*vty
)
188 struct zebra_vrf
*zvrf
;
190 RB_FOREACH (vrf
, vrf_name_head
, &vrfs_by_name
)
191 if ((zvrf
= vrf
->info
) != NULL
)
192 if (zvrf
->rid_user_assigned
.u
.prefix4
.s_addr
) {
193 if (zvrf_id(zvrf
) == VRF_DEFAULT
)
194 vty_out(vty
, "router-id %s\n",
196 zvrf
->rid_user_assigned
199 vty_out(vty
, "router-id %s vrf %s\n",
201 zvrf
->rid_user_assigned
209 "router-id A.B.C.D [vrf NAME]",
210 "Manually set the router-id\n"
211 "IP address to use for router-id\n"
218 vrf_id_t vrf_id
= VRF_DEFAULT
;
220 rid
.u
.prefix4
.s_addr
= inet_addr(argv
[idx_ipv4
]->arg
);
221 if (!rid
.u
.prefix4
.s_addr
)
222 return CMD_WARNING_CONFIG_FAILED
;
225 rid
.family
= AF_INET
;
228 VRF_GET_ID(vrf_id
, argv
[idx_name
]->arg
);
230 router_id_set(&rid
, vrf_id
);
237 "no router-id [A.B.C.D [vrf NAME]]",
239 "Remove the manually configured router-id\n"
240 "IP address to use for router-id\n"
246 vrf_id_t vrf_id
= VRF_DEFAULT
;
248 rid
.u
.prefix4
.s_addr
= 0;
250 rid
.family
= AF_INET
;
253 VRF_GET_ID(vrf_id
, argv
[idx_name
]->arg
);
255 router_id_set(&rid
, vrf_id
);
261 static int router_id_cmp(void *a
, void *b
)
263 const struct connected
*ifa
= (const struct connected
*)a
;
264 const struct connected
*ifb
= (const struct connected
*)b
;
266 return IPV4_ADDR_CMP(&ifa
->address
->u
.prefix4
.s_addr
,
267 &ifb
->address
->u
.prefix4
.s_addr
);
270 void router_id_cmd_init(void)
272 install_element(CONFIG_NODE
, &router_id_cmd
);
273 install_element(CONFIG_NODE
, &no_router_id_cmd
);
276 void router_id_init(struct zebra_vrf
*zvrf
)
278 zvrf
->rid_all_sorted_list
= &zvrf
->_rid_all_sorted_list
;
279 zvrf
->rid_lo_sorted_list
= &zvrf
->_rid_lo_sorted_list
;
281 memset(zvrf
->rid_all_sorted_list
, 0,
282 sizeof(zvrf
->_rid_all_sorted_list
));
283 memset(zvrf
->rid_lo_sorted_list
, 0, sizeof(zvrf
->_rid_lo_sorted_list
));
284 memset(&zvrf
->rid_user_assigned
, 0, sizeof(zvrf
->rid_user_assigned
));
286 zvrf
->rid_all_sorted_list
->cmp
= router_id_cmp
;
287 zvrf
->rid_lo_sorted_list
->cmp
= router_id_cmp
;
289 zvrf
->rid_user_assigned
.family
= AF_INET
;
290 zvrf
->rid_user_assigned
.prefixlen
= 32;