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7c551956 DS |
1 | /* |
2 | * Copyright (C) 2016 CumulusNetworks | |
3 | * Donald Sharp | |
4 | * | |
5 | * This file is part of Quagga | |
6 | * | |
7 | * Quagga is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2, or (at your option) any | |
10 | * later version. | |
11 | * | |
12 | * Quagga is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with GNU Zebra; see the file COPYING. If not, write to the Free | |
19 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
20 | * 02111-1307, USA. | |
21 | */ | |
22 | #include <zebra.h> | |
23 | ||
24 | #include "log.h" | |
25 | #include "linklist.h" | |
4a1ab8e4 | 26 | #include "memory.h" |
7c551956 DS |
27 | |
28 | #include "zebra/debug.h" | |
29 | #include "zebra/zserv.h" | |
30 | #include "zebra/rib.h" | |
31 | #include "zebra/zebra_vrf.h" | |
32 | #include "zebra/router-id.h" | |
4a1ab8e4 | 33 | #include "zebra/zebra_memory.h" |
28f6dde8 | 34 | #include "zebra/zebra_static.h" |
7c551956 DS |
35 | |
36 | extern struct zebra_t zebrad; | |
871d39b3 | 37 | struct list *zvrf_list; |
7c551956 DS |
38 | |
39 | /* VRF information update. */ | |
40 | static void | |
41 | zebra_vrf_add_update (struct zebra_vrf *zvrf) | |
42 | { | |
43 | struct listnode *node, *nnode; | |
44 | struct zserv *client; | |
45 | ||
46 | if (IS_ZEBRA_DEBUG_EVENT) | |
47 | zlog_debug ("MESSAGE: ZEBRA_VRF_ADD %s", zvrf->name); | |
48 | ||
49 | for (ALL_LIST_ELEMENTS (zebrad.client_list, node, nnode, client)) | |
50 | zsend_vrf_add (client, zvrf); | |
51 | } | |
52 | ||
53 | static void | |
54 | zebra_vrf_delete_update (struct zebra_vrf *zvrf) | |
55 | { | |
56 | struct listnode *node, *nnode; | |
57 | struct zserv *client; | |
58 | ||
59 | if (IS_ZEBRA_DEBUG_EVENT) | |
60 | zlog_debug ("MESSAGE: ZEBRA_VRF_DELETE %s", zvrf->name); | |
61 | ||
62 | for (ALL_LIST_ELEMENTS (zebrad.client_list, node, nnode, client)) | |
63 | zsend_vrf_delete (client, zvrf); | |
64 | } | |
65 | ||
66 | void | |
67 | zebra_vrf_update_all (struct zserv *client) | |
68 | { | |
69 | struct vrf *vrf; | |
70 | vrf_iter_t iter; | |
71 | ||
72 | for (iter = vrf_first (); iter != VRF_ITER_INVALID; iter = vrf_next (iter)) | |
73 | { | |
74 | if ((vrf = vrf_iter2vrf (iter)) && vrf->vrf_id) | |
75 | zsend_vrf_add (client, vrf_info_lookup (vrf->vrf_id)); | |
76 | } | |
77 | } | |
78 | ||
79 | /* Callback upon creating a new VRF. */ | |
80 | static int | |
81 | zebra_vrf_new (vrf_id_t vrf_id, const char *name, void **info) | |
82 | { | |
83 | struct zebra_vrf *zvrf = *info; | |
84 | ||
3f6d6a5d DS |
85 | if (IS_ZEBRA_DEBUG_EVENT) |
86 | zlog_info ("ZVRF %s with id %u", name, vrf_id); | |
7c551956 DS |
87 | |
88 | if (! zvrf) | |
89 | { | |
871d39b3 DS |
90 | zvrf = zebra_vrf_list_lookup_by_name (name); |
91 | if (!zvrf) | |
92 | { | |
93 | zvrf = zebra_vrf_alloc (vrf_id, name); | |
94 | zvrf->zns = zebra_ns_lookup (NS_DEFAULT); /* Point to the global (single) NS */ | |
95 | *info = (void *)zvrf; | |
96 | router_id_init (zvrf); | |
97 | listnode_add_sort (zvrf_list, zvrf); | |
98 | } | |
99 | else | |
100 | { | |
101 | *info = (void *)zvrf; | |
102 | router_id_init (zvrf); | |
103 | } | |
7c551956 DS |
104 | } |
105 | ||
34f8e6af DS |
106 | if (zvrf->vrf_id == VRF_UNKNOWN) |
107 | zvrf->vrf_id = vrf_id; | |
108 | ||
7c551956 DS |
109 | return 0; |
110 | } | |
111 | ||
fb148af4 DS |
112 | /* |
113 | * Moving an interface amongst different vrf's | |
114 | * causes the interface to get a new ifindex | |
115 | * so we need to find static routes with | |
116 | * the old ifindex and replace with new | |
117 | * ifindex to insert back into the table | |
118 | */ | |
119 | void | |
120 | zebra_vrf_static_route_interface_fixup (struct interface *ifp) | |
121 | { | |
122 | afi_t afi; | |
123 | safi_t safi; | |
124 | struct zebra_vrf *zvrf = zebra_vrf_lookup (ifp->vrf_id); | |
125 | struct route_table *stable = NULL; | |
126 | struct route_node *rn = NULL; | |
127 | struct static_route *si = NULL; | |
128 | ||
129 | if (!zvrf) | |
130 | return; | |
131 | ||
132 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
133 | { | |
134 | for (safi = SAFI_UNICAST ; safi < SAFI_MAX ; safi++) | |
135 | { | |
136 | stable = zvrf->stable[afi][safi]; | |
137 | if (stable) | |
138 | for (rn = route_top (stable); rn; rn = route_next (rn)) | |
139 | { | |
140 | if (rn->info) | |
141 | { | |
142 | si = rn->info; | |
143 | if ((strcmp (si->ifname, ifp->name) == 0) && | |
144 | (si->ifindex != ifp->ifindex)) | |
145 | { | |
146 | si->ifindex = ifp->ifindex; | |
147 | static_install_route (afi, safi, &rn->p, si); | |
148 | } | |
149 | } | |
150 | } | |
151 | } | |
152 | } | |
153 | ||
154 | } | |
155 | ||
7c551956 DS |
156 | /* Callback upon enabling a VRF. */ |
157 | static int | |
158 | zebra_vrf_enable (vrf_id_t vrf_id, const char *name, void **info) | |
159 | { | |
160 | struct zebra_vrf *zvrf = (struct zebra_vrf *) (*info); | |
fb148af4 DS |
161 | struct route_table *stable = NULL; |
162 | struct route_node *rn = NULL; | |
163 | struct static_route *si = NULL; | |
164 | struct interface *ifp = NULL; | |
165 | afi_t afi; | |
166 | safi_t safi; | |
7c551956 DS |
167 | |
168 | assert (zvrf); | |
169 | ||
170 | zebra_vrf_add_update (zvrf); | |
171 | ||
fb148af4 DS |
172 | for (afi = AFI_IP; afi < AFI_MAX; afi++) |
173 | { | |
174 | for (safi = SAFI_UNICAST ; safi < SAFI_MAX ; safi++) | |
175 | { | |
176 | stable = zvrf->stable[afi][safi]; | |
177 | if (stable) | |
178 | { | |
179 | for (rn = route_top (stable); rn; rn = route_next (rn)) | |
180 | { | |
181 | if (rn->info) | |
182 | { | |
183 | si = rn->info; | |
184 | si->vrf_id = vrf_id; | |
185 | if (si->ifindex) | |
186 | { | |
187 | ifp = if_lookup_by_name_vrf (si->ifname, si->vrf_id); | |
188 | if (ifp) | |
189 | si->ifindex = ifp->ifindex; | |
190 | else | |
191 | continue; | |
192 | } | |
193 | static_install_route (afi, safi, &rn->p, si); | |
194 | } | |
195 | } | |
196 | } | |
197 | } | |
198 | } | |
7c551956 DS |
199 | return 0; |
200 | } | |
201 | ||
202 | /* Callback upon disabling a VRF. */ | |
203 | static int | |
204 | zebra_vrf_disable (vrf_id_t vrf_id, const char *name, void **info) | |
205 | { | |
206 | struct zebra_vrf *zvrf = (struct zebra_vrf *)(*info); | |
fb148af4 DS |
207 | struct route_table *stable = NULL; |
208 | struct route_node *rn = NULL; | |
209 | afi_t afi; | |
210 | safi_t safi; | |
7c551956 DS |
211 | |
212 | if (IS_ZEBRA_DEBUG_KERNEL) | |
213 | zlog_debug ("VRF %s id %u is now disabled.", | |
214 | zvrf->name, zvrf->vrf_id); | |
215 | ||
fb148af4 DS |
216 | for (afi = AFI_IP; afi < AFI_MAX; afi++) |
217 | { | |
218 | for (safi = SAFI_UNICAST ; safi < SAFI_MAX ; safi++) | |
219 | { | |
220 | stable = zvrf->stable[afi][safi]; | |
221 | if (stable) | |
222 | { | |
223 | for (rn = route_top (stable); rn; rn = route_next (rn)) | |
224 | { | |
225 | if (rn->info) | |
226 | static_uninstall_route(afi, safi, &rn->p, rn->info); | |
227 | } | |
228 | } | |
229 | } | |
230 | } | |
7c551956 DS |
231 | return 0; |
232 | } | |
233 | ||
234 | static int | |
235 | zebra_vrf_delete (vrf_id_t vrf_id, const char *name, void **info) | |
236 | { | |
237 | struct zebra_vrf *zvrf = (struct zebra_vrf *) (*info); | |
238 | ||
239 | assert (zvrf); | |
240 | ||
241 | zebra_vrf_delete_update (zvrf); | |
242 | ||
243 | rib_close_table (zvrf->table[AFI_IP][SAFI_UNICAST]); | |
244 | rib_close_table (zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
245 | ||
246 | list_delete_all_node (zvrf->rid_all_sorted_list); | |
247 | list_delete_all_node (zvrf->rid_lo_sorted_list); | |
248 | ||
871d39b3 | 249 | zvrf->vrf_id = VRF_UNKNOWN; |
7c551956 | 250 | |
871d39b3 | 251 | *info = NULL; |
7c551956 DS |
252 | return 0; |
253 | } | |
254 | ||
255 | /* Lookup the routing table in a VRF based on both VRF-Id and table-id. | |
256 | * NOTE: Table-id is relevant only in the Default VRF. | |
257 | */ | |
258 | struct route_table * | |
259 | zebra_vrf_table_with_table_id (afi_t afi, safi_t safi, | |
260 | vrf_id_t vrf_id, u_int32_t table_id) | |
261 | { | |
262 | struct route_table *table = NULL; | |
263 | ||
264 | if (afi >= AFI_MAX || safi >= SAFI_MAX) | |
265 | return NULL; | |
266 | ||
267 | if (vrf_id == VRF_DEFAULT) | |
268 | { | |
269 | if (table_id == RT_TABLE_MAIN || | |
270 | table_id == zebrad.rtm_table_default) | |
271 | table = zebra_vrf_table (afi, safi, vrf_id); | |
272 | else | |
273 | table = zebra_vrf_other_route_table (afi, table_id, vrf_id); | |
274 | } | |
275 | else | |
276 | table = zebra_vrf_table (afi, safi, vrf_id); | |
277 | ||
278 | return table; | |
279 | } | |
280 | ||
281 | /* | |
282 | * Create a routing table for the specific AFI/SAFI in the given VRF. | |
283 | */ | |
284 | static void | |
285 | zebra_vrf_table_create (struct zebra_vrf *zvrf, afi_t afi, safi_t safi) | |
286 | { | |
287 | rib_table_info_t *info; | |
288 | struct route_table *table; | |
289 | ||
290 | assert (!zvrf->table[afi][safi]); | |
291 | ||
292 | table = route_table_init (); | |
293 | zvrf->table[afi][safi] = table; | |
294 | ||
295 | info = XCALLOC (MTYPE_RIB_TABLE_INFO, sizeof (*info)); | |
296 | info->zvrf = zvrf; | |
297 | info->afi = afi; | |
298 | info->safi = safi; | |
299 | table->info = info; | |
300 | } | |
301 | ||
302 | /* Allocate new zebra VRF. */ | |
303 | struct zebra_vrf * | |
304 | zebra_vrf_alloc (vrf_id_t vrf_id, const char *name) | |
305 | { | |
306 | struct zebra_vrf *zvrf; | |
307 | ||
308 | zvrf = XCALLOC (MTYPE_ZEBRA_VRF, sizeof (struct zebra_vrf)); | |
309 | ||
310 | /* Allocate routing table and static table. */ | |
311 | zebra_vrf_table_create (zvrf, AFI_IP, SAFI_UNICAST); | |
312 | zebra_vrf_table_create (zvrf, AFI_IP6, SAFI_UNICAST); | |
313 | zvrf->stable[AFI_IP][SAFI_UNICAST] = route_table_init (); | |
314 | zvrf->stable[AFI_IP6][SAFI_UNICAST] = route_table_init (); | |
315 | zebra_vrf_table_create (zvrf, AFI_IP, SAFI_MULTICAST); | |
316 | zebra_vrf_table_create (zvrf, AFI_IP6, SAFI_MULTICAST); | |
317 | zvrf->stable[AFI_IP][SAFI_MULTICAST] = route_table_init (); | |
318 | zvrf->stable[AFI_IP6][SAFI_MULTICAST] = route_table_init (); | |
319 | ||
320 | zvrf->rnh_table[AFI_IP] = route_table_init(); | |
321 | zvrf->rnh_table[AFI_IP6] = route_table_init(); | |
322 | ||
323 | zvrf->import_check_table[AFI_IP] = route_table_init(); | |
324 | zvrf->import_check_table[AFI_IP6] = route_table_init(); | |
325 | ||
326 | /* Set VRF ID */ | |
327 | zvrf->vrf_id = vrf_id; | |
328 | ||
329 | if (name) | |
330 | { | |
331 | strncpy (zvrf->name, name, strlen(name)); | |
332 | zvrf->name[strlen(name)] = '\0'; | |
333 | } | |
334 | ||
335 | return zvrf; | |
336 | } | |
337 | ||
338 | /* Lookup VRF by identifier. */ | |
339 | struct zebra_vrf * | |
340 | zebra_vrf_lookup (vrf_id_t vrf_id) | |
341 | { | |
342 | return vrf_info_lookup (vrf_id); | |
343 | } | |
344 | ||
871d39b3 DS |
345 | /* Lookup the zvrf in the zvrf_list. */ |
346 | struct zebra_vrf * | |
347 | zebra_vrf_list_lookup_by_name (const char *name) | |
348 | { | |
349 | struct listnode *node; | |
350 | struct zebra_vrf *zvrf; | |
351 | ||
a3d21ef3 DS |
352 | if (!name) |
353 | name = VRF_DEFAULT_NAME; | |
354 | ||
355 | for (ALL_LIST_ELEMENTS_RO (zvrf_list, node, zvrf)) | |
356 | { | |
357 | if (strcmp(name, zvrf->name) == 0) | |
358 | return zvrf; | |
359 | } | |
871d39b3 DS |
360 | return NULL; |
361 | } | |
362 | ||
7c551956 DS |
363 | /* Lookup the routing table in an enabled VRF. */ |
364 | struct route_table * | |
365 | zebra_vrf_table (afi_t afi, safi_t safi, vrf_id_t vrf_id) | |
366 | { | |
367 | struct zebra_vrf *zvrf = vrf_info_lookup (vrf_id); | |
368 | ||
369 | if (!zvrf) | |
370 | return NULL; | |
371 | ||
372 | if (afi >= AFI_MAX || safi >= SAFI_MAX) | |
373 | return NULL; | |
374 | ||
375 | return zvrf->table[afi][safi]; | |
376 | } | |
377 | ||
378 | /* Lookup the static routing table in a VRF. */ | |
379 | struct route_table * | |
01bb6d57 | 380 | zebra_vrf_static_table (afi_t afi, safi_t safi, struct zebra_vrf *zvrf) |
7c551956 | 381 | { |
7c551956 DS |
382 | if (!zvrf) |
383 | return NULL; | |
384 | ||
385 | if (afi >= AFI_MAX || safi >= SAFI_MAX) | |
386 | return NULL; | |
387 | ||
388 | return zvrf->stable[afi][safi]; | |
389 | } | |
390 | ||
391 | struct route_table * | |
392 | zebra_vrf_other_route_table (afi_t afi, u_int32_t table_id, vrf_id_t vrf_id) | |
393 | { | |
394 | struct zebra_vrf *zvrf; | |
395 | rib_table_info_t *info; | |
396 | struct route_table *table; | |
397 | ||
398 | zvrf = vrf_info_lookup (vrf_id); | |
399 | if (! zvrf) | |
400 | return NULL; | |
401 | ||
402 | if(afi >= AFI_MAX) | |
403 | return NULL; | |
404 | ||
405 | if (table_id >= ZEBRA_KERNEL_TABLE_MAX) | |
406 | return NULL; | |
407 | ||
408 | if ((vrf_id == VRF_DEFAULT) && (table_id != RT_TABLE_MAIN) && (table_id != zebrad.rtm_table_default)) | |
409 | { | |
410 | if (zvrf->other_table[afi][table_id] == NULL) | |
411 | { | |
412 | table = route_table_init(); | |
413 | info = XCALLOC (MTYPE_RIB_TABLE_INFO, sizeof (*info)); | |
414 | info->zvrf = zvrf; | |
415 | info->afi = afi; | |
416 | info->safi = SAFI_UNICAST; | |
417 | table->info = info; | |
418 | zvrf->other_table[afi][table_id] = table; | |
419 | } | |
420 | ||
421 | return (zvrf->other_table[afi][table_id]); | |
422 | } | |
423 | ||
424 | return zvrf->table[afi][SAFI_UNICAST]; | |
425 | } | |
426 | ||
427 | /* Zebra VRF initialization. */ | |
428 | void | |
429 | zebra_vrf_init (void) | |
430 | { | |
431 | vrf_add_hook (VRF_NEW_HOOK, zebra_vrf_new); | |
432 | vrf_add_hook (VRF_ENABLE_HOOK, zebra_vrf_enable); | |
433 | vrf_add_hook (VRF_DISABLE_HOOK, zebra_vrf_disable); | |
434 | vrf_add_hook (VRF_DELETE_HOOK, zebra_vrf_delete); | |
435 | ||
871d39b3 DS |
436 | zvrf_list = list_new (); |
437 | ||
7c551956 DS |
438 | vrf_init (); |
439 | } |