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18a6dce6 | 1 | /* |
2 | * Router ID for zebra daemon. | |
3 | * | |
4 | * Copyright (C) 2004 James R. Leu | |
5 | * | |
6 | * This file is part of Quagga routing suite. | |
7 | * | |
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 | |
11 | * later version. | |
12 | * | |
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. | |
17 | * | |
896014f4 DL |
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 | |
18a6dce6 | 21 | */ |
22 | ||
23 | #include <zebra.h> | |
24 | ||
25 | #include "if.h" | |
26 | #include "vty.h" | |
27 | #include "sockunion.h" | |
28 | #include "prefix.h" | |
29 | #include "stream.h" | |
30 | #include "command.h" | |
31 | #include "memory.h" | |
4a1ab8e4 | 32 | #include "zebra_memory.h" |
18a6dce6 | 33 | #include "ioctl.h" |
34 | #include "connected.h" | |
35 | #include "network.h" | |
36 | #include "log.h" | |
37 | #include "table.h" | |
38 | #include "rib.h" | |
c6ffe645 | 39 | #include "vrf.h" |
18a6dce6 | 40 | |
41 | #include "zebra/zserv.h" | |
7c551956 | 42 | #include "zebra/zebra_vrf.h" |
a1ac18c4 | 43 | #include "zebra/router-id.h" |
6dc686a2 | 44 | #include "zebra/redistribute.h" |
18a6dce6 | 45 | |
1f9a9fff PJ |
46 | /* master zebra server structure */ |
47 | extern struct zebra_t zebrad; | |
48 | ||
18a6dce6 | 49 | static struct connected * |
50 | router_id_find_node (struct list *l, struct connected *ifc) | |
51 | { | |
52 | struct listnode *node; | |
53 | struct connected *c; | |
54 | ||
1eb8ef25 | 55 | for (ALL_LIST_ELEMENTS_RO (l, node, c)) |
56 | if (prefix_same (ifc->address, c->address)) | |
57 | return c; | |
58 | ||
18a6dce6 | 59 | return NULL; |
60 | } | |
61 | ||
62 | static int | |
63 | router_id_bad_address (struct connected *ifc) | |
64 | { | |
18a6dce6 | 65 | if (ifc->address->family != AF_INET) |
66 | return 1; | |
6dc686a2 PJ |
67 | |
68 | /* non-redistributable addresses shouldn't be used for RIDs either */ | |
69 | if (!zebra_check_addr (ifc->address)) | |
18a6dce6 | 70 | return 1; |
6dc686a2 | 71 | |
18a6dce6 | 72 | return 0; |
73 | } | |
74 | ||
75 | void | |
c6ffe645 | 76 | router_id_get (struct prefix *p, vrf_id_t vrf_id) |
18a6dce6 | 77 | { |
78 | struct listnode *node; | |
79 | struct connected *c; | |
c6ffe645 | 80 | struct zebra_vrf *zvrf = vrf_info_get (vrf_id); |
18a6dce6 | 81 | |
82 | p->u.prefix4.s_addr = 0; | |
83 | p->family = AF_INET; | |
84 | p->prefixlen = 32; | |
85 | ||
c6ffe645 FL |
86 | if (zvrf->rid_user_assigned.u.prefix4.s_addr) |
87 | p->u.prefix4.s_addr = zvrf->rid_user_assigned.u.prefix4.s_addr; | |
88 | else if (!list_isempty (zvrf->rid_lo_sorted_list)) | |
18a6dce6 | 89 | { |
c6ffe645 | 90 | node = listtail (zvrf->rid_lo_sorted_list); |
1eb8ef25 | 91 | c = listgetdata (node); |
18a6dce6 | 92 | p->u.prefix4.s_addr = c->address->u.prefix4.s_addr; |
93 | } | |
c6ffe645 | 94 | else if (!list_isempty (zvrf->rid_all_sorted_list)) |
18a6dce6 | 95 | { |
c6ffe645 | 96 | node = listtail (zvrf->rid_all_sorted_list); |
1eb8ef25 | 97 | c = listgetdata (node); |
18a6dce6 | 98 | p->u.prefix4.s_addr = c->address->u.prefix4.s_addr; |
99 | } | |
100 | } | |
101 | ||
102 | static void | |
c6ffe645 | 103 | router_id_set (struct prefix *p, vrf_id_t vrf_id) |
18a6dce6 | 104 | { |
105 | struct prefix p2; | |
106 | struct listnode *node; | |
107 | struct zserv *client; | |
c6ffe645 | 108 | struct zebra_vrf *zvrf; |
18a6dce6 | 109 | |
c6ffe645 FL |
110 | if (p->u.prefix4.s_addr == 0) /* unset */ |
111 | { | |
112 | zvrf = vrf_info_lookup (vrf_id); | |
113 | if (! zvrf) | |
114 | return; | |
115 | } | |
116 | else /* set */ | |
117 | zvrf = vrf_info_get (vrf_id); | |
18a6dce6 | 118 | |
c6ffe645 FL |
119 | zvrf->rid_user_assigned.u.prefix4.s_addr = p->u.prefix4.s_addr; |
120 | ||
121 | router_id_get (&p2, vrf_id); | |
1eb8ef25 | 122 | |
123 | for (ALL_LIST_ELEMENTS_RO (zebrad.client_list, node, client)) | |
c6ffe645 | 124 | zsend_router_id_update (client, &p2, vrf_id); |
18a6dce6 | 125 | } |
126 | ||
127 | void | |
128 | router_id_add_address (struct connected *ifc) | |
129 | { | |
130 | struct list *l = NULL; | |
131 | struct listnode *node; | |
132 | struct prefix before; | |
133 | struct prefix after; | |
134 | struct zserv *client; | |
c6ffe645 | 135 | struct zebra_vrf *zvrf = vrf_info_get (ifc->ifp->vrf_id); |
18a6dce6 | 136 | |
137 | if (router_id_bad_address (ifc)) | |
138 | return; | |
139 | ||
661512bf | 140 | router_id_get (&before, zvrf_id (zvrf)); |
18a6dce6 | 141 | |
142 | if (!strncmp (ifc->ifp->name, "lo", 2) | |
143 | || !strncmp (ifc->ifp->name, "dummy", 5)) | |
c6ffe645 | 144 | l = zvrf->rid_lo_sorted_list; |
18a6dce6 | 145 | else |
c6ffe645 | 146 | l = zvrf->rid_all_sorted_list; |
18a6dce6 | 147 | |
148 | if (!router_id_find_node (l, ifc)) | |
b6516829 | 149 | listnode_add_sort (l, ifc); |
18a6dce6 | 150 | |
661512bf | 151 | router_id_get (&after, zvrf_id (zvrf)); |
18a6dce6 | 152 | |
153 | if (prefix_same (&before, &after)) | |
154 | return; | |
155 | ||
1eb8ef25 | 156 | for (ALL_LIST_ELEMENTS_RO (zebrad.client_list, node, client)) |
661512bf | 157 | zsend_router_id_update (client, &after, zvrf_id (zvrf)); |
18a6dce6 | 158 | } |
159 | ||
160 | void | |
161 | router_id_del_address (struct connected *ifc) | |
162 | { | |
163 | struct connected *c; | |
164 | struct list *l; | |
165 | struct prefix after; | |
166 | struct prefix before; | |
167 | struct listnode *node; | |
168 | struct zserv *client; | |
c6ffe645 | 169 | struct zebra_vrf *zvrf = vrf_info_get (ifc->ifp->vrf_id); |
18a6dce6 | 170 | |
171 | if (router_id_bad_address (ifc)) | |
172 | return; | |
173 | ||
661512bf | 174 | router_id_get (&before, zvrf_id (zvrf)); |
18a6dce6 | 175 | |
176 | if (!strncmp (ifc->ifp->name, "lo", 2) | |
177 | || !strncmp (ifc->ifp->name, "dummy", 5)) | |
c6ffe645 | 178 | l = zvrf->rid_lo_sorted_list; |
18a6dce6 | 179 | else |
c6ffe645 | 180 | l = zvrf->rid_all_sorted_list; |
18a6dce6 | 181 | |
182 | if ((c = router_id_find_node (l, ifc))) | |
183 | listnode_delete (l, c); | |
184 | ||
661512bf | 185 | router_id_get (&after, zvrf_id (zvrf)); |
18a6dce6 | 186 | |
187 | if (prefix_same (&before, &after)) | |
188 | return; | |
189 | ||
1eb8ef25 | 190 | for (ALL_LIST_ELEMENTS_RO (zebrad.client_list, node, client)) |
661512bf | 191 | zsend_router_id_update (client, &after, zvrf_id (zvrf)); |
18a6dce6 | 192 | } |
193 | ||
194 | void | |
195 | router_id_write (struct vty *vty) | |
196 | { | |
1a1a7065 | 197 | struct vrf *vrf; |
c6ffe645 | 198 | struct zebra_vrf *zvrf; |
c6ffe645 | 199 | |
a62c4901 | 200 | RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) |
1a1a7065 | 201 | if ((zvrf = vrf->info) != NULL) |
c6ffe645 FL |
202 | if (zvrf->rid_user_assigned.u.prefix4.s_addr) |
203 | { | |
661512bf | 204 | if (zvrf_id (zvrf) == VRF_DEFAULT) |
c6ffe645 FL |
205 | vty_out (vty, "router-id %s%s", |
206 | inet_ntoa (zvrf->rid_user_assigned.u.prefix4), | |
207 | VTY_NEWLINE); | |
208 | else | |
1d75f883 | 209 | vty_out (vty, "router-id %s vrf %s%s", |
c6ffe645 | 210 | inet_ntoa (zvrf->rid_user_assigned.u.prefix4), |
661512bf | 211 | zvrf_name (zvrf), |
c6ffe645 FL |
212 | VTY_NEWLINE); |
213 | } | |
18a6dce6 | 214 | } |
215 | ||
216 | DEFUN (router_id, | |
217 | router_id_cmd, | |
92300491 | 218 | "router-id A.B.C.D [vrf NAME]", |
18a6dce6 | 219 | "Manually set the router-id\n" |
92300491 DW |
220 | "IP address to use for router-id\n" |
221 | VRF_CMD_HELP_STR) | |
18a6dce6 | 222 | { |
7c022376 | 223 | int idx_ipv4 = 1; |
92300491 DW |
224 | int idx_name = 3; |
225 | ||
18a6dce6 | 226 | struct prefix rid; |
c6ffe645 | 227 | vrf_id_t vrf_id = VRF_DEFAULT; |
18a6dce6 | 228 | |
7c022376 | 229 | rid.u.prefix4.s_addr = inet_addr (argv[idx_ipv4]->arg); |
18a6dce6 | 230 | if (!rid.u.prefix4.s_addr) |
231 | return CMD_WARNING; | |
232 | ||
233 | rid.prefixlen = 32; | |
234 | rid.family = AF_INET; | |
235 | ||
92300491 DW |
236 | if (argc > 2) |
237 | VRF_GET_ID (vrf_id, argv[idx_name]->arg); | |
c6ffe645 FL |
238 | |
239 | router_id_set (&rid, vrf_id); | |
18a6dce6 | 240 | |
241 | return CMD_SUCCESS; | |
242 | } | |
243 | ||
244 | DEFUN (no_router_id, | |
245 | no_router_id_cmd, | |
92300491 | 246 | "no router-id [A.B.C.D [vrf NAME]]", |
18a6dce6 | 247 | NO_STR |
92300491 DW |
248 | "Remove the manually configured router-id\n" |
249 | "IP address to use for router-id\n" | |
250 | VRF_CMD_HELP_STR) | |
18a6dce6 | 251 | { |
92300491 DW |
252 | int idx_name = 4; |
253 | ||
18a6dce6 | 254 | struct prefix rid; |
c6ffe645 | 255 | vrf_id_t vrf_id = VRF_DEFAULT; |
18a6dce6 | 256 | |
257 | rid.u.prefix4.s_addr = 0; | |
258 | rid.prefixlen = 0; | |
259 | rid.family = AF_INET; | |
260 | ||
92300491 DW |
261 | if (argc > 3) |
262 | VRF_GET_ID (vrf_id, argv[idx_name]->arg); | |
c6ffe645 FL |
263 | |
264 | router_id_set (&rid, vrf_id); | |
18a6dce6 | 265 | |
266 | return CMD_SUCCESS; | |
267 | } | |
268 | ||
813d4307 | 269 | |
c6ffe645 | 270 | |
a1ac18c4 | 271 | static int |
18a6dce6 | 272 | router_id_cmp (void *a, void *b) |
273 | { | |
b6516829 SH |
274 | const struct connected *ifa = (const struct connected *)a; |
275 | const struct connected *ifb = (const struct connected *)b; | |
18a6dce6 | 276 | |
24c84dbe | 277 | return IPV4_ADDR_CMP(&ifa->address->u.prefix4.s_addr,&ifb->address->u.prefix4.s_addr); |
18a6dce6 | 278 | } |
279 | ||
280 | void | |
c6ffe645 | 281 | router_id_cmd_init (void) |
18a6dce6 | 282 | { |
283 | install_element (CONFIG_NODE, &router_id_cmd); | |
284 | install_element (CONFIG_NODE, &no_router_id_cmd); | |
c6ffe645 FL |
285 | } |
286 | ||
287 | void | |
288 | router_id_init (struct zebra_vrf *zvrf) | |
289 | { | |
290 | zvrf->rid_all_sorted_list = &zvrf->_rid_all_sorted_list; | |
291 | zvrf->rid_lo_sorted_list = &zvrf->_rid_lo_sorted_list; | |
18a6dce6 | 292 | |
c6ffe645 FL |
293 | memset (zvrf->rid_all_sorted_list, 0, sizeof (zvrf->_rid_all_sorted_list)); |
294 | memset (zvrf->rid_lo_sorted_list, 0, sizeof (zvrf->_rid_lo_sorted_list)); | |
295 | memset (&zvrf->rid_user_assigned, 0, sizeof (zvrf->rid_user_assigned)); | |
18a6dce6 | 296 | |
c6ffe645 FL |
297 | zvrf->rid_all_sorted_list->cmp = router_id_cmp; |
298 | zvrf->rid_lo_sorted_list->cmp = router_id_cmp; | |
18a6dce6 | 299 | |
c6ffe645 FL |
300 | zvrf->rid_user_assigned.family = AF_INET; |
301 | zvrf->rid_user_assigned.prefixlen = 32; | |
18a6dce6 | 302 | } |