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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 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with GNU Zebra; see the file COPYING. If not, write to the Free | |
20 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
21 | * 02111-1307, USA. | |
22 | */ | |
23 | ||
24 | #include <zebra.h> | |
25 | ||
26 | #include "if.h" | |
27 | #include "vty.h" | |
28 | #include "sockunion.h" | |
29 | #include "prefix.h" | |
30 | #include "stream.h" | |
31 | #include "command.h" | |
32 | #include "memory.h" | |
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 | |
18a6dce6 | 46 | static struct connected * |
47 | router_id_find_node (struct list *l, struct connected *ifc) | |
48 | { | |
49 | struct listnode *node; | |
50 | struct connected *c; | |
51 | ||
1eb8ef25 | 52 | for (ALL_LIST_ELEMENTS_RO (l, node, c)) |
53 | if (prefix_same (ifc->address, c->address)) | |
54 | return c; | |
55 | ||
18a6dce6 | 56 | return NULL; |
57 | } | |
58 | ||
59 | static int | |
60 | router_id_bad_address (struct connected *ifc) | |
61 | { | |
18a6dce6 | 62 | if (ifc->address->family != AF_INET) |
63 | return 1; | |
6dc686a2 PJ |
64 | |
65 | /* non-redistributable addresses shouldn't be used for RIDs either */ | |
66 | if (!zebra_check_addr (ifc->address)) | |
18a6dce6 | 67 | return 1; |
6dc686a2 | 68 | |
18a6dce6 | 69 | return 0; |
70 | } | |
71 | ||
72 | void | |
c6ffe645 | 73 | router_id_get (struct prefix *p, vrf_id_t vrf_id) |
18a6dce6 | 74 | { |
75 | struct listnode *node; | |
76 | struct connected *c; | |
c6ffe645 | 77 | struct zebra_vrf *zvrf = vrf_info_get (vrf_id); |
18a6dce6 | 78 | |
79 | p->u.prefix4.s_addr = 0; | |
80 | p->family = AF_INET; | |
81 | p->prefixlen = 32; | |
82 | ||
c6ffe645 FL |
83 | if (zvrf->rid_user_assigned.u.prefix4.s_addr) |
84 | p->u.prefix4.s_addr = zvrf->rid_user_assigned.u.prefix4.s_addr; | |
85 | else if (!list_isempty (zvrf->rid_lo_sorted_list)) | |
18a6dce6 | 86 | { |
c6ffe645 | 87 | node = listtail (zvrf->rid_lo_sorted_list); |
1eb8ef25 | 88 | c = listgetdata (node); |
18a6dce6 | 89 | p->u.prefix4.s_addr = c->address->u.prefix4.s_addr; |
90 | } | |
c6ffe645 | 91 | else if (!list_isempty (zvrf->rid_all_sorted_list)) |
18a6dce6 | 92 | { |
c6ffe645 | 93 | node = listtail (zvrf->rid_all_sorted_list); |
1eb8ef25 | 94 | c = listgetdata (node); |
18a6dce6 | 95 | p->u.prefix4.s_addr = c->address->u.prefix4.s_addr; |
96 | } | |
97 | } | |
98 | ||
99 | static void | |
c6ffe645 | 100 | router_id_set (struct prefix *p, vrf_id_t vrf_id) |
18a6dce6 | 101 | { |
102 | struct prefix p2; | |
103 | struct listnode *node; | |
104 | struct zserv *client; | |
c6ffe645 | 105 | struct zebra_vrf *zvrf; |
18a6dce6 | 106 | |
c6ffe645 FL |
107 | if (p->u.prefix4.s_addr == 0) /* unset */ |
108 | { | |
109 | zvrf = vrf_info_lookup (vrf_id); | |
110 | if (! zvrf) | |
111 | return; | |
112 | } | |
113 | else /* set */ | |
114 | zvrf = vrf_info_get (vrf_id); | |
18a6dce6 | 115 | |
c6ffe645 FL |
116 | zvrf->rid_user_assigned.u.prefix4.s_addr = p->u.prefix4.s_addr; |
117 | ||
118 | router_id_get (&p2, vrf_id); | |
1eb8ef25 | 119 | |
120 | for (ALL_LIST_ELEMENTS_RO (zebrad.client_list, node, client)) | |
c6ffe645 | 121 | zsend_router_id_update (client, &p2, vrf_id); |
18a6dce6 | 122 | } |
123 | ||
124 | void | |
125 | router_id_add_address (struct connected *ifc) | |
126 | { | |
127 | struct list *l = NULL; | |
128 | struct listnode *node; | |
129 | struct prefix before; | |
130 | struct prefix after; | |
131 | struct zserv *client; | |
c6ffe645 | 132 | struct zebra_vrf *zvrf = vrf_info_get (ifc->ifp->vrf_id); |
18a6dce6 | 133 | |
134 | if (router_id_bad_address (ifc)) | |
135 | return; | |
136 | ||
c6ffe645 | 137 | router_id_get (&before, zvrf->vrf_id); |
18a6dce6 | 138 | |
139 | if (!strncmp (ifc->ifp->name, "lo", 2) | |
140 | || !strncmp (ifc->ifp->name, "dummy", 5)) | |
c6ffe645 | 141 | l = zvrf->rid_lo_sorted_list; |
18a6dce6 | 142 | else |
c6ffe645 | 143 | l = zvrf->rid_all_sorted_list; |
18a6dce6 | 144 | |
145 | if (!router_id_find_node (l, ifc)) | |
b6516829 | 146 | listnode_add_sort (l, ifc); |
18a6dce6 | 147 | |
c6ffe645 | 148 | router_id_get (&after, zvrf->vrf_id); |
18a6dce6 | 149 | |
150 | if (prefix_same (&before, &after)) | |
151 | return; | |
152 | ||
1eb8ef25 | 153 | for (ALL_LIST_ELEMENTS_RO (zebrad.client_list, node, client)) |
c6ffe645 | 154 | zsend_router_id_update (client, &after, zvrf->vrf_id); |
18a6dce6 | 155 | } |
156 | ||
157 | void | |
158 | router_id_del_address (struct connected *ifc) | |
159 | { | |
160 | struct connected *c; | |
161 | struct list *l; | |
162 | struct prefix after; | |
163 | struct prefix before; | |
164 | struct listnode *node; | |
165 | struct zserv *client; | |
c6ffe645 | 166 | struct zebra_vrf *zvrf = vrf_info_get (ifc->ifp->vrf_id); |
18a6dce6 | 167 | |
168 | if (router_id_bad_address (ifc)) | |
169 | return; | |
170 | ||
c6ffe645 | 171 | router_id_get (&before, zvrf->vrf_id); |
18a6dce6 | 172 | |
173 | if (!strncmp (ifc->ifp->name, "lo", 2) | |
174 | || !strncmp (ifc->ifp->name, "dummy", 5)) | |
c6ffe645 | 175 | l = zvrf->rid_lo_sorted_list; |
18a6dce6 | 176 | else |
c6ffe645 | 177 | l = zvrf->rid_all_sorted_list; |
18a6dce6 | 178 | |
179 | if ((c = router_id_find_node (l, ifc))) | |
180 | listnode_delete (l, c); | |
181 | ||
c6ffe645 | 182 | router_id_get (&after, zvrf->vrf_id); |
18a6dce6 | 183 | |
184 | if (prefix_same (&before, &after)) | |
185 | return; | |
186 | ||
1eb8ef25 | 187 | for (ALL_LIST_ELEMENTS_RO (zebrad.client_list, node, client)) |
c6ffe645 | 188 | zsend_router_id_update (client, &after, zvrf->vrf_id); |
18a6dce6 | 189 | } |
190 | ||
191 | void | |
192 | router_id_write (struct vty *vty) | |
193 | { | |
c6ffe645 FL |
194 | struct zebra_vrf *zvrf; |
195 | vrf_iter_t iter; | |
196 | ||
197 | for (iter = vrf_first (); iter != VRF_ITER_INVALID; iter = vrf_next (iter)) | |
198 | if ((zvrf = vrf_iter2info (iter)) != NULL) | |
199 | if (zvrf->rid_user_assigned.u.prefix4.s_addr) | |
200 | { | |
201 | if (zvrf->vrf_id == VRF_DEFAULT) | |
202 | vty_out (vty, "router-id %s%s", | |
203 | inet_ntoa (zvrf->rid_user_assigned.u.prefix4), | |
204 | VTY_NEWLINE); | |
205 | else | |
1d75f883 | 206 | vty_out (vty, "router-id %s vrf %s%s", |
c6ffe645 | 207 | inet_ntoa (zvrf->rid_user_assigned.u.prefix4), |
1d75f883 | 208 | zvrf->name, |
c6ffe645 FL |
209 | VTY_NEWLINE); |
210 | } | |
18a6dce6 | 211 | } |
212 | ||
213 | DEFUN (router_id, | |
214 | router_id_cmd, | |
215 | "router-id A.B.C.D", | |
216 | "Manually set the router-id\n" | |
217 | "IP address to use for router-id\n") | |
218 | { | |
219 | struct prefix rid; | |
c6ffe645 | 220 | vrf_id_t vrf_id = VRF_DEFAULT; |
18a6dce6 | 221 | |
222 | rid.u.prefix4.s_addr = inet_addr (argv[0]); | |
223 | if (!rid.u.prefix4.s_addr) | |
224 | return CMD_WARNING; | |
225 | ||
226 | rid.prefixlen = 32; | |
227 | rid.family = AF_INET; | |
228 | ||
c6ffe645 | 229 | if (argc > 1) |
12f6fb97 | 230 | VRF_GET_ID (vrf_id, argv[1]); |
c6ffe645 FL |
231 | |
232 | router_id_set (&rid, vrf_id); | |
18a6dce6 | 233 | |
234 | return CMD_SUCCESS; | |
235 | } | |
236 | ||
c6ffe645 FL |
237 | ALIAS (router_id, |
238 | router_id_vrf_cmd, | |
239 | "router-id A.B.C.D " VRF_CMD_STR, | |
240 | "Manually set the router-id\n" | |
241 | "IP address to use for router-id\n" | |
242 | VRF_CMD_HELP_STR) | |
243 | ||
18a6dce6 | 244 | DEFUN (no_router_id, |
245 | no_router_id_cmd, | |
246 | "no router-id", | |
247 | NO_STR | |
248 | "Remove the manually configured router-id\n") | |
249 | { | |
250 | struct prefix rid; | |
c6ffe645 | 251 | vrf_id_t vrf_id = VRF_DEFAULT; |
18a6dce6 | 252 | |
253 | rid.u.prefix4.s_addr = 0; | |
254 | rid.prefixlen = 0; | |
255 | rid.family = AF_INET; | |
256 | ||
813d4307 | 257 | if (argc > 1) |
12f6fb97 | 258 | VRF_GET_ID (vrf_id, argv[1]); |
c6ffe645 FL |
259 | |
260 | router_id_set (&rid, vrf_id); | |
18a6dce6 | 261 | |
262 | return CMD_SUCCESS; | |
263 | } | |
264 | ||
813d4307 DW |
265 | ALIAS (no_router_id, |
266 | no_router_id_val_cmd, | |
267 | "no router-id A.B.C.D", | |
268 | NO_STR | |
269 | "Remove the manually configured router-id\n" | |
270 | "IP address to use for router-id\n") | |
271 | ||
c6ffe645 FL |
272 | ALIAS (no_router_id, |
273 | no_router_id_vrf_cmd, | |
813d4307 | 274 | "no router-id A.B.C.D " VRF_CMD_STR, |
c6ffe645 FL |
275 | NO_STR |
276 | "Remove the manually configured router-id\n" | |
813d4307 | 277 | "IP address to use for router-id\n" |
c6ffe645 FL |
278 | VRF_CMD_HELP_STR) |
279 | ||
a1ac18c4 | 280 | static int |
18a6dce6 | 281 | router_id_cmp (void *a, void *b) |
282 | { | |
b6516829 SH |
283 | const struct connected *ifa = (const struct connected *)a; |
284 | const struct connected *ifb = (const struct connected *)b; | |
18a6dce6 | 285 | |
24c84dbe | 286 | return IPV4_ADDR_CMP(&ifa->address->u.prefix4.s_addr,&ifb->address->u.prefix4.s_addr); |
18a6dce6 | 287 | } |
288 | ||
289 | void | |
c6ffe645 | 290 | router_id_cmd_init (void) |
18a6dce6 | 291 | { |
292 | install_element (CONFIG_NODE, &router_id_cmd); | |
293 | install_element (CONFIG_NODE, &no_router_id_cmd); | |
c6ffe645 | 294 | install_element (CONFIG_NODE, &router_id_vrf_cmd); |
813d4307 | 295 | install_element (CONFIG_NODE, &no_router_id_val_cmd); |
c6ffe645 FL |
296 | install_element (CONFIG_NODE, &no_router_id_vrf_cmd); |
297 | } | |
298 | ||
299 | void | |
300 | router_id_init (struct zebra_vrf *zvrf) | |
301 | { | |
302 | zvrf->rid_all_sorted_list = &zvrf->_rid_all_sorted_list; | |
303 | zvrf->rid_lo_sorted_list = &zvrf->_rid_lo_sorted_list; | |
18a6dce6 | 304 | |
c6ffe645 FL |
305 | memset (zvrf->rid_all_sorted_list, 0, sizeof (zvrf->_rid_all_sorted_list)); |
306 | memset (zvrf->rid_lo_sorted_list, 0, sizeof (zvrf->_rid_lo_sorted_list)); | |
307 | memset (&zvrf->rid_user_assigned, 0, sizeof (zvrf->rid_user_assigned)); | |
18a6dce6 | 308 | |
c6ffe645 FL |
309 | zvrf->rid_all_sorted_list->cmp = router_id_cmp; |
310 | zvrf->rid_lo_sorted_list->cmp = router_id_cmp; | |
18a6dce6 | 311 | |
c6ffe645 FL |
312 | zvrf->rid_user_assigned.family = AF_INET; |
313 | zvrf->rid_user_assigned.prefixlen = 32; | |
18a6dce6 | 314 | } |