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b72ede27 FL |
1 | /* |
2 | * VRF functions. | |
3 | * Copyright (C) 2014 6WIND S.A. | |
4 | * | |
5 | * This file is part of GNU Zebra. | |
6 | * | |
7 | * GNU Zebra is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published | |
9 | * by the Free Software Foundation; either version 2, or (at your | |
10 | * option) any later version. | |
11 | * | |
12 | * GNU Zebra 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 | * | |
896014f4 DL |
17 | * You should have received a copy of the GNU General Public License along |
18 | * with this program; see the file COPYING; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
b72ede27 FL |
20 | */ |
21 | ||
22 | #include <zebra.h> | |
23 | ||
4691b65a PG |
24 | /* for basename */ |
25 | #include <libgen.h> | |
26 | ||
6a69b354 | 27 | #include "if.h" |
b72ede27 | 28 | #include "vrf.h" |
7922fc65 | 29 | #include "vrf_int.h" |
b72ede27 FL |
30 | #include "prefix.h" |
31 | #include "table.h" | |
32 | #include "log.h" | |
33 | #include "memory.h" | |
19dc275e | 34 | #include "command.h" |
b95c1883 | 35 | #include "ns.h" |
3bc34908 | 36 | #include "privs.h" |
98cbbaea | 37 | #include "nexthop_group.h" |
19dc275e | 38 | |
ec31f30d PG |
39 | /* default VRF ID value used when VRF backend is not NETNS */ |
40 | #define VRF_DEFAULT_INTERNAL 0 | |
41 | ||
d62a17ae | 42 | DEFINE_MTYPE_STATIC(LIB, VRF, "VRF") |
4a1ab8e4 DL |
43 | DEFINE_MTYPE_STATIC(LIB, VRF_BITMAP, "VRF bit-map") |
44 | ||
e80e7cce DL |
45 | DEFINE_QOBJ_TYPE(vrf) |
46 | ||
d62a17ae | 47 | static __inline int vrf_id_compare(const struct vrf *, const struct vrf *); |
48 | static __inline int vrf_name_compare(const struct vrf *, const struct vrf *); | |
1a1a7065 | 49 | |
d62a17ae | 50 | RB_GENERATE(vrf_id_head, vrf, id_entry, vrf_id_compare); |
51 | RB_GENERATE(vrf_name_head, vrf, name_entry, vrf_name_compare); | |
1a1a7065 | 52 | |
d62a17ae | 53 | struct vrf_id_head vrfs_by_id = RB_INITIALIZER(&vrfs_by_id); |
54 | struct vrf_name_head vrfs_by_name = RB_INITIALIZER(&vrfs_by_name); | |
1a1a7065 | 55 | |
78dd30b2 | 56 | static int vrf_backend; |
3bc34908 | 57 | static struct zebra_privs_t *vrf_daemon_privs; |
78dd30b2 | 58 | |
19dc275e DS |
59 | /* |
60 | * Turn on/off debug code | |
61 | * for vrf. | |
62 | */ | |
63 | int debug_vrf = 0; | |
b72ede27 | 64 | |
b72ede27 | 65 | /* Holding VRF hooks */ |
d62a17ae | 66 | struct vrf_master { |
67 | int (*vrf_new_hook)(struct vrf *); | |
68 | int (*vrf_delete_hook)(struct vrf *); | |
69 | int (*vrf_enable_hook)(struct vrf *); | |
70 | int (*vrf_disable_hook)(struct vrf *); | |
71 | } vrf_master = { | |
72 | 0, | |
73 | }; | |
b72ede27 | 74 | |
d62a17ae | 75 | static int vrf_is_enabled(struct vrf *vrf); |
e5bf3e1e | 76 | |
216b18ef | 77 | /* VRF list existance check by name. */ |
d62a17ae | 78 | struct vrf *vrf_lookup_by_name(const char *name) |
216b18ef | 79 | { |
d62a17ae | 80 | struct vrf vrf; |
81 | strlcpy(vrf.name, name, sizeof(vrf.name)); | |
82 | return (RB_FIND(vrf_name_head, &vrfs_by_name, &vrf)); | |
216b18ef | 83 | } |
216b18ef | 84 | |
d62a17ae | 85 | static __inline int vrf_id_compare(const struct vrf *a, const struct vrf *b) |
b72ede27 | 86 | { |
d62a17ae | 87 | return (a->vrf_id - b->vrf_id); |
216b18ef DS |
88 | } |
89 | ||
d62a17ae | 90 | static int vrf_name_compare(const struct vrf *a, const struct vrf *b) |
b72ede27 | 91 | { |
d62a17ae | 92 | return strcmp(a->name, b->name); |
b72ede27 FL |
93 | } |
94 | ||
e26aedbe PG |
95 | /* if ns_id is different and not VRF_UNKNOWN, |
96 | * then update vrf identifier, and enable VRF | |
97 | */ | |
98 | static void vrf_update_vrf_id(ns_id_t ns_id, void *opaqueptr) | |
99 | { | |
100 | ns_id_t vrf_id = (vrf_id_t)ns_id; | |
101 | vrf_id_t old_vrf_id; | |
102 | struct vrf *vrf = (struct vrf *)opaqueptr; | |
103 | ||
104 | if (!vrf) | |
105 | return; | |
106 | old_vrf_id = vrf->vrf_id; | |
107 | if (vrf_id == vrf->vrf_id) | |
108 | return; | |
109 | if (vrf->vrf_id != VRF_UNKNOWN) | |
110 | RB_REMOVE(vrf_id_head, &vrfs_by_id, vrf); | |
111 | vrf->vrf_id = vrf_id; | |
112 | RB_INSERT(vrf_id_head, &vrfs_by_id, vrf); | |
113 | if (old_vrf_id == VRF_UNKNOWN) | |
114 | vrf_enable((struct vrf *)vrf); | |
115 | } | |
116 | ||
ce1be369 PG |
117 | int vrf_switch_to_netns(vrf_id_t vrf_id) |
118 | { | |
119 | char *name; | |
120 | struct vrf *vrf = vrf_lookup_by_id(vrf_id); | |
121 | ||
ce1be369 | 122 | /* VRF is default VRF. silently ignore */ |
e26aedbe | 123 | if (!vrf || vrf->vrf_id == VRF_DEFAULT) |
9dff1132 | 124 | return 1; /* 1 = default */ |
e26aedbe PG |
125 | /* VRF has no NETNS backend. silently ignore */ |
126 | if (vrf->data.l.netns_name[0] == '\0') | |
9dff1132 | 127 | return 2; /* 2 = no netns */ |
ce1be369 PG |
128 | name = ns_netns_pathname(NULL, vrf->data.l.netns_name); |
129 | if (debug_vrf) | |
130 | zlog_debug("VRF_SWITCH: %s(%u)", name, vrf->vrf_id); | |
131 | return ns_switch_to_netns(name); | |
132 | } | |
133 | ||
134 | int vrf_switchback_to_initial(void) | |
135 | { | |
136 | int ret = ns_switchback_to_initial(); | |
137 | ||
138 | if (ret == 0 && debug_vrf) | |
139 | zlog_debug("VRF_SWITCHBACK"); | |
140 | return ret; | |
141 | } | |
142 | ||
216b18ef | 143 | /* Get a VRF. If not found, create one. |
34f8e6af DS |
144 | * Arg: |
145 | * name - The name of the vrf. May be NULL if unknown. | |
146 | * vrf_id - The vrf_id of the vrf. May be VRF_UNKNOWN if unknown | |
216b18ef | 147 | * Description: Please note that this routine can be called with just the name |
34f8e6af DS |
148 | * and 0 vrf-id |
149 | */ | |
d62a17ae | 150 | struct vrf *vrf_get(vrf_id_t vrf_id, const char *name) |
151 | { | |
152 | struct vrf *vrf = NULL; | |
153 | int new = 0; | |
154 | ||
155 | if (debug_vrf) | |
996c9314 LB |
156 | zlog_debug("VRF_GET: %s(%u)", name == NULL ? "(NULL)" : name, |
157 | vrf_id); | |
d62a17ae | 158 | |
159 | /* Nothing to see, move along here */ | |
160 | if (!name && vrf_id == VRF_UNKNOWN) | |
161 | return NULL; | |
162 | ||
0c2bac38 PG |
163 | /* attempt to find already available VRF |
164 | */ | |
165 | if (name) | |
166 | vrf = vrf_lookup_by_name(name); | |
d62a17ae | 167 | /* Try to find VRF both by ID and name */ |
0c2bac38 | 168 | if (!vrf && vrf_id != VRF_UNKNOWN) |
d62a17ae | 169 | vrf = vrf_lookup_by_id(vrf_id); |
d62a17ae | 170 | |
171 | if (vrf == NULL) { | |
172 | vrf = XCALLOC(MTYPE_VRF, sizeof(struct vrf)); | |
173 | vrf->vrf_id = VRF_UNKNOWN; | |
d62a17ae | 174 | QOBJ_REG(vrf, vrf); |
175 | new = 1; | |
176 | ||
177 | if (debug_vrf) | |
178 | zlog_debug("VRF(%u) %s is created.", vrf_id, | |
179 | (name) ? name : "(NULL)"); | |
180 | } | |
181 | ||
182 | /* Set identifier */ | |
183 | if (vrf_id != VRF_UNKNOWN && vrf->vrf_id == VRF_UNKNOWN) { | |
184 | vrf->vrf_id = vrf_id; | |
185 | RB_INSERT(vrf_id_head, &vrfs_by_id, vrf); | |
186 | } | |
187 | ||
188 | /* Set name */ | |
189 | if (name && vrf->name[0] != '\0' && strcmp(name, vrf->name)) { | |
190 | RB_REMOVE(vrf_name_head, &vrfs_by_name, vrf); | |
191 | strlcpy(vrf->name, name, sizeof(vrf->name)); | |
192 | RB_INSERT(vrf_name_head, &vrfs_by_name, vrf); | |
193 | } else if (name && vrf->name[0] == '\0') { | |
194 | strlcpy(vrf->name, name, sizeof(vrf->name)); | |
195 | RB_INSERT(vrf_name_head, &vrfs_by_name, vrf); | |
196 | } | |
d62a17ae | 197 | if (new &&vrf_master.vrf_new_hook) |
198 | (*vrf_master.vrf_new_hook)(vrf); | |
199 | ||
200 | return vrf; | |
b72ede27 FL |
201 | } |
202 | ||
84915b0a | 203 | /* Delete a VRF. This is called when the underlying VRF goes away, a |
204 | * pre-configured VRF is deleted or when shutting down (vrf_terminate()). | |
205 | */ | |
d62a17ae | 206 | void vrf_delete(struct vrf *vrf) |
b72ede27 | 207 | { |
d62a17ae | 208 | if (debug_vrf) |
209 | zlog_debug("VRF %u is to be deleted.", vrf->vrf_id); | |
b72ede27 | 210 | |
d62a17ae | 211 | if (vrf_is_enabled(vrf)) |
212 | vrf_disable(vrf); | |
e5bf3e1e | 213 | |
84915b0a | 214 | /* If the VRF is user configured, it'll stick around, just remove |
215 | * the ID mapping. Interfaces assigned to this VRF should've been | |
216 | * removed already as part of the VRF going down. | |
217 | */ | |
218 | if (vrf_is_user_cfged(vrf)) { | |
219 | if (vrf->vrf_id != VRF_UNKNOWN) { | |
220 | /* Delete any VRF interfaces - should be only | |
221 | * the VRF itself, other interfaces should've | |
222 | * been moved out of the VRF. | |
223 | */ | |
224 | if_terminate(vrf); | |
225 | RB_REMOVE(vrf_id_head, &vrfs_by_id, vrf); | |
226 | vrf->vrf_id = VRF_UNKNOWN; | |
227 | } | |
228 | return; | |
229 | } | |
230 | ||
d62a17ae | 231 | if (vrf_master.vrf_delete_hook) |
232 | (*vrf_master.vrf_delete_hook)(vrf); | |
216b18ef | 233 | |
d62a17ae | 234 | QOBJ_UNREG(vrf); |
f4e14fdb | 235 | if_terminate(vrf); |
b72ede27 | 236 | |
d62a17ae | 237 | if (vrf->vrf_id != VRF_UNKNOWN) |
238 | RB_REMOVE(vrf_id_head, &vrfs_by_id, vrf); | |
239 | if (vrf->name[0] != '\0') | |
240 | RB_REMOVE(vrf_name_head, &vrfs_by_name, vrf); | |
b72ede27 | 241 | |
d62a17ae | 242 | XFREE(MTYPE_VRF, vrf); |
b72ede27 FL |
243 | } |
244 | ||
245 | /* Look up a VRF by identifier. */ | |
d62a17ae | 246 | struct vrf *vrf_lookup_by_id(vrf_id_t vrf_id) |
b72ede27 | 247 | { |
d62a17ae | 248 | struct vrf vrf; |
249 | vrf.vrf_id = vrf_id; | |
250 | return (RB_FIND(vrf_id_head, &vrfs_by_id, &vrf)); | |
b72ede27 FL |
251 | } |
252 | ||
e5bf3e1e FL |
253 | /* |
254 | * Enable a VRF - that is, let the VRF be ready to use. | |
255 | * The VRF_ENABLE_HOOK callback will be called to inform | |
256 | * that they can allocate resources in this VRF. | |
257 | * | |
258 | * RETURN: 1 - enabled successfully; otherwise, 0. | |
259 | */ | |
d62a17ae | 260 | int vrf_enable(struct vrf *vrf) |
e5bf3e1e | 261 | { |
d62a17ae | 262 | if (vrf_is_enabled(vrf)) |
263 | return 1; | |
05e8e11e | 264 | |
d62a17ae | 265 | if (debug_vrf) |
266 | zlog_debug("VRF %u is enabled.", vrf->vrf_id); | |
e5bf3e1e | 267 | |
d62a17ae | 268 | SET_FLAG(vrf->status, VRF_ACTIVE); |
e5bf3e1e | 269 | |
d62a17ae | 270 | if (vrf_master.vrf_enable_hook) |
271 | (*vrf_master.vrf_enable_hook)(vrf); | |
e5bf3e1e | 272 | |
98cbbaea DS |
273 | /* |
274 | * If we have any nexthop group entries that | |
275 | * are awaiting vrf initialization then | |
276 | * let's let people know about it | |
277 | */ | |
278 | nexthop_group_enable_vrf(vrf); | |
279 | ||
d62a17ae | 280 | return 1; |
e5bf3e1e FL |
281 | } |
282 | ||
283 | /* | |
284 | * Disable a VRF - that is, let the VRF be unusable. | |
285 | * The VRF_DELETE_HOOK callback will be called to inform | |
286 | * that they must release the resources in the VRF. | |
287 | */ | |
697d3ec7 | 288 | void vrf_disable(struct vrf *vrf) |
e5bf3e1e | 289 | { |
d62a17ae | 290 | if (!vrf_is_enabled(vrf)) |
291 | return; | |
a647bfa8 | 292 | |
d62a17ae | 293 | UNSET_FLAG(vrf->status, VRF_ACTIVE); |
e5bf3e1e | 294 | |
d62a17ae | 295 | if (debug_vrf) |
296 | zlog_debug("VRF %u is to be disabled.", vrf->vrf_id); | |
e5bf3e1e | 297 | |
d62a17ae | 298 | /* Till now, nothing to be done for the default VRF. */ |
299 | // Pending: see why this statement. | |
e74f14fc | 300 | |
d62a17ae | 301 | if (vrf_master.vrf_disable_hook) |
302 | (*vrf_master.vrf_disable_hook)(vrf); | |
e5bf3e1e FL |
303 | } |
304 | ||
b7cfce93 MK |
305 | const char *vrf_id_to_name(vrf_id_t vrf_id) |
306 | { | |
307 | struct vrf *vrf; | |
308 | ||
309 | vrf = vrf_lookup_by_id(vrf_id); | |
310 | if (vrf) | |
311 | return vrf->name; | |
312 | ||
181c08c6 | 313 | return "n/a"; |
b7cfce93 MK |
314 | } |
315 | ||
d62a17ae | 316 | vrf_id_t vrf_name_to_id(const char *name) |
216b18ef | 317 | { |
d62a17ae | 318 | struct vrf *vrf; |
319 | vrf_id_t vrf_id = VRF_DEFAULT; // Pending: need a way to return invalid | |
320 | // id/ routine not used. | |
216b18ef | 321 | |
d62a17ae | 322 | vrf = vrf_lookup_by_name(name); |
323 | if (vrf) | |
324 | vrf_id = vrf->vrf_id; | |
216b18ef | 325 | |
d62a17ae | 326 | return vrf_id; |
216b18ef DS |
327 | } |
328 | ||
b72ede27 | 329 | /* Get the data pointer of the specified VRF. If not found, create one. */ |
d62a17ae | 330 | void *vrf_info_get(vrf_id_t vrf_id) |
b72ede27 | 331 | { |
d62a17ae | 332 | struct vrf *vrf = vrf_get(vrf_id, NULL); |
333 | return vrf->info; | |
b72ede27 FL |
334 | } |
335 | ||
336 | /* Look up the data pointer of the specified VRF. */ | |
d62a17ae | 337 | void *vrf_info_lookup(vrf_id_t vrf_id) |
b72ede27 | 338 | { |
d62a17ae | 339 | struct vrf *vrf = vrf_lookup_by_id(vrf_id); |
340 | return vrf ? vrf->info : NULL; | |
b72ede27 FL |
341 | } |
342 | ||
7076bb2f FL |
343 | /* |
344 | * VRF bit-map | |
345 | */ | |
346 | ||
3bd74754 | 347 | #define VRF_BITMAP_NUM_OF_GROUPS 1024 |
a9ff90c4 | 348 | #define VRF_BITMAP_NUM_OF_BITS_IN_GROUP (UINT32_MAX / VRF_BITMAP_NUM_OF_GROUPS) |
d62a17ae | 349 | #define VRF_BITMAP_NUM_OF_BYTES_IN_GROUP \ |
350 | (VRF_BITMAP_NUM_OF_BITS_IN_GROUP / CHAR_BIT + 1) /* +1 for ensure */ | |
351 | ||
352 | #define VRF_BITMAP_GROUP(_id) ((_id) / VRF_BITMAP_NUM_OF_BITS_IN_GROUP) | |
353 | #define VRF_BITMAP_BIT_OFFSET(_id) ((_id) % VRF_BITMAP_NUM_OF_BITS_IN_GROUP) | |
354 | ||
355 | #define VRF_BITMAP_INDEX_IN_GROUP(_bit_offset) ((_bit_offset) / CHAR_BIT) | |
d7c0a89a QY |
356 | #define VRF_BITMAP_FLAG(_bit_offset) \ |
357 | (((uint8_t)1) << ((_bit_offset) % CHAR_BIT)) | |
d62a17ae | 358 | |
359 | struct vrf_bitmap { | |
d7c0a89a | 360 | uint8_t *groups[VRF_BITMAP_NUM_OF_GROUPS]; |
7076bb2f FL |
361 | }; |
362 | ||
d62a17ae | 363 | vrf_bitmap_t vrf_bitmap_init(void) |
7076bb2f | 364 | { |
d62a17ae | 365 | return (vrf_bitmap_t)XCALLOC(MTYPE_VRF_BITMAP, |
366 | sizeof(struct vrf_bitmap)); | |
7076bb2f FL |
367 | } |
368 | ||
d62a17ae | 369 | void vrf_bitmap_free(vrf_bitmap_t bmap) |
7076bb2f | 370 | { |
d62a17ae | 371 | struct vrf_bitmap *bm = (struct vrf_bitmap *)bmap; |
372 | int i; | |
7076bb2f | 373 | |
d62a17ae | 374 | if (bmap == VRF_BITMAP_NULL) |
375 | return; | |
7076bb2f | 376 | |
d62a17ae | 377 | for (i = 0; i < VRF_BITMAP_NUM_OF_GROUPS; i++) |
378 | if (bm->groups[i]) | |
379 | XFREE(MTYPE_VRF_BITMAP, bm->groups[i]); | |
7076bb2f | 380 | |
d62a17ae | 381 | XFREE(MTYPE_VRF_BITMAP, bm); |
7076bb2f FL |
382 | } |
383 | ||
d62a17ae | 384 | void vrf_bitmap_set(vrf_bitmap_t bmap, vrf_id_t vrf_id) |
7076bb2f | 385 | { |
d62a17ae | 386 | struct vrf_bitmap *bm = (struct vrf_bitmap *)bmap; |
d7c0a89a QY |
387 | uint8_t group = VRF_BITMAP_GROUP(vrf_id); |
388 | uint8_t offset = VRF_BITMAP_BIT_OFFSET(vrf_id); | |
7076bb2f | 389 | |
d62a17ae | 390 | if (bmap == VRF_BITMAP_NULL || vrf_id == VRF_UNKNOWN) |
391 | return; | |
7076bb2f | 392 | |
d62a17ae | 393 | if (bm->groups[group] == NULL) |
394 | bm->groups[group] = XCALLOC(MTYPE_VRF_BITMAP, | |
395 | VRF_BITMAP_NUM_OF_BYTES_IN_GROUP); | |
7076bb2f | 396 | |
d62a17ae | 397 | SET_FLAG(bm->groups[group][VRF_BITMAP_INDEX_IN_GROUP(offset)], |
398 | VRF_BITMAP_FLAG(offset)); | |
7076bb2f FL |
399 | } |
400 | ||
d62a17ae | 401 | void vrf_bitmap_unset(vrf_bitmap_t bmap, vrf_id_t vrf_id) |
7076bb2f | 402 | { |
d62a17ae | 403 | struct vrf_bitmap *bm = (struct vrf_bitmap *)bmap; |
d7c0a89a QY |
404 | uint8_t group = VRF_BITMAP_GROUP(vrf_id); |
405 | uint8_t offset = VRF_BITMAP_BIT_OFFSET(vrf_id); | |
7076bb2f | 406 | |
d62a17ae | 407 | if (bmap == VRF_BITMAP_NULL || vrf_id == VRF_UNKNOWN |
408 | || bm->groups[group] == NULL) | |
409 | return; | |
7076bb2f | 410 | |
d62a17ae | 411 | UNSET_FLAG(bm->groups[group][VRF_BITMAP_INDEX_IN_GROUP(offset)], |
412 | VRF_BITMAP_FLAG(offset)); | |
7076bb2f FL |
413 | } |
414 | ||
d62a17ae | 415 | int vrf_bitmap_check(vrf_bitmap_t bmap, vrf_id_t vrf_id) |
7076bb2f | 416 | { |
d62a17ae | 417 | struct vrf_bitmap *bm = (struct vrf_bitmap *)bmap; |
d7c0a89a QY |
418 | uint8_t group = VRF_BITMAP_GROUP(vrf_id); |
419 | uint8_t offset = VRF_BITMAP_BIT_OFFSET(vrf_id); | |
7076bb2f | 420 | |
d62a17ae | 421 | if (bmap == VRF_BITMAP_NULL || vrf_id == VRF_UNKNOWN |
422 | || bm->groups[group] == NULL) | |
423 | return 0; | |
7076bb2f | 424 | |
d62a17ae | 425 | return CHECK_FLAG(bm->groups[group][VRF_BITMAP_INDEX_IN_GROUP(offset)], |
426 | VRF_BITMAP_FLAG(offset)) | |
427 | ? 1 | |
428 | : 0; | |
7076bb2f FL |
429 | } |
430 | ||
d62a17ae | 431 | static void vrf_autocomplete(vector comps, struct cmd_token *token) |
d617d5fe | 432 | { |
d62a17ae | 433 | struct vrf *vrf = NULL; |
d617d5fe | 434 | |
a2addae8 | 435 | RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) { |
a9ff90c4 | 436 | if (vrf->vrf_id != VRF_DEFAULT) |
d62a17ae | 437 | vector_set(comps, XSTRDUP(MTYPE_COMPLETION, vrf->name)); |
438 | } | |
d617d5fe DS |
439 | } |
440 | ||
441 | static const struct cmd_variable_handler vrf_var_handlers[] = { | |
d62a17ae | 442 | { |
443 | .varname = "vrf", | |
444 | .completions = vrf_autocomplete, | |
445 | }, | |
446 | {.completions = NULL}, | |
d617d5fe DS |
447 | }; |
448 | ||
b72ede27 | 449 | /* Initialize VRF module. */ |
d62a17ae | 450 | void vrf_init(int (*create)(struct vrf *), int (*enable)(struct vrf *), |
451 | int (*disable)(struct vrf *), int (*delete)(struct vrf *)) | |
452 | { | |
453 | struct vrf *default_vrf; | |
454 | ||
e26aedbe PG |
455 | /* initialise NS, in case VRF backend if NETNS */ |
456 | ns_init(); | |
d62a17ae | 457 | if (debug_vrf) |
458 | zlog_debug("%s: Initializing VRF subsystem", | |
459 | __PRETTY_FUNCTION__); | |
460 | ||
461 | vrf_master.vrf_new_hook = create; | |
462 | vrf_master.vrf_enable_hook = enable; | |
463 | vrf_master.vrf_disable_hook = disable; | |
464 | vrf_master.vrf_delete_hook = delete; | |
465 | ||
466 | /* The default VRF always exists. */ | |
467 | default_vrf = vrf_get(VRF_DEFAULT, VRF_DEFAULT_NAME); | |
468 | if (!default_vrf) { | |
469 | zlog_err("vrf_init: failed to create the default VRF!"); | |
470 | exit(1); | |
471 | } | |
472 | ||
473 | /* Enable the default VRF. */ | |
474 | if (!vrf_enable(default_vrf)) { | |
475 | zlog_err("vrf_init: failed to enable the default VRF!"); | |
476 | exit(1); | |
477 | } | |
478 | ||
479 | cmd_variable_handler_register(vrf_var_handlers); | |
b72ede27 FL |
480 | } |
481 | ||
482 | /* Terminate VRF module. */ | |
d62a17ae | 483 | void vrf_terminate(void) |
b72ede27 | 484 | { |
d62a17ae | 485 | struct vrf *vrf; |
b72ede27 | 486 | |
d62a17ae | 487 | if (debug_vrf) |
488 | zlog_debug("%s: Shutting down vrf subsystem", | |
489 | __PRETTY_FUNCTION__); | |
19dc275e | 490 | |
55cd0f61 DS |
491 | while (!RB_EMPTY(vrf_id_head, &vrfs_by_id)) { |
492 | vrf = RB_ROOT(vrf_id_head, &vrfs_by_id); | |
493 | ||
65c3a7c4 | 494 | /* Clear configured flag and invoke delete. */ |
495 | UNSET_FLAG(vrf->status, VRF_CONFIGURED); | |
d62a17ae | 496 | vrf_delete(vrf); |
65c3a7c4 | 497 | } |
55cd0f61 DS |
498 | |
499 | while (!RB_EMPTY(vrf_name_head, &vrfs_by_name)) { | |
500 | vrf = RB_ROOT(vrf_name_head, &vrfs_by_name); | |
501 | ||
65c3a7c4 | 502 | /* Clear configured flag and invoke delete. */ |
503 | UNSET_FLAG(vrf->status, VRF_CONFIGURED); | |
d62a17ae | 504 | vrf_delete(vrf); |
65c3a7c4 | 505 | } |
b72ede27 FL |
506 | } |
507 | ||
9dff1132 LB |
508 | static int vrf_default_accepts_vrf(int type) |
509 | { | |
510 | const char *fname = NULL; | |
511 | char buf[32] = {0x0}; | |
512 | int ret = 0; | |
513 | FILE *fd = NULL; | |
514 | ||
515 | /* | |
516 | * TCP & UDP services running in the default VRF context (ie., not bound | |
517 | * to any VRF device) can work across all VRF domains by enabling the | |
518 | * tcp_l3mdev_accept and udp_l3mdev_accept sysctl options: | |
519 | * sysctl -w net.ipv4.tcp_l3mdev_accept=1 | |
520 | * sysctl -w net.ipv4.udp_l3mdev_accept=1 | |
521 | */ | |
522 | if (type == SOCK_STREAM) | |
523 | fname = "/proc/sys/net/ipv4/tcp_l3mdev_accept"; | |
524 | else if (type == SOCK_DGRAM) | |
525 | fname = "/proc/sys/net/ipv4/udp_l3mdev_accept"; | |
526 | else | |
527 | return ret; | |
528 | fd = fopen(fname, "r"); | |
529 | if (fd == NULL) | |
530 | return ret; | |
531 | fgets(buf, 32, fd); | |
532 | ret = atoi(buf); | |
533 | fclose(fd); | |
534 | return ret; | |
535 | } | |
536 | ||
e5bf3e1e | 537 | /* Create a socket for the VRF. */ |
0f4977c6 PG |
538 | int vrf_socket(int domain, int type, int protocol, vrf_id_t vrf_id, |
539 | char *interfacename) | |
e5bf3e1e | 540 | { |
2e0d2b3d | 541 | int ret, save_errno, ret2; |
e5bf3e1e | 542 | |
2e0d2b3d PG |
543 | ret = vrf_switch_to_netns(vrf_id); |
544 | if (ret < 0) | |
996c9314 LB |
545 | zlog_err("%s: Can't switch to VRF %u (%s)", __func__, vrf_id, |
546 | safe_strerror(errno)); | |
9dff1132 LB |
547 | if (ret > 0 && interfacename && vrf_default_accepts_vrf(type)) { |
548 | zlog_err("VRF socket not used since net.ipv4.%s_l3mdev_accept != 0", | |
549 | (type == SOCK_STREAM ? "tcp" : "udp")); | |
550 | errno = EEXIST; /* not sure if this is the best error... */ | |
551 | return -2; | |
552 | } | |
d62a17ae | 553 | ret = socket(domain, type, protocol); |
2e0d2b3d PG |
554 | save_errno = errno; |
555 | ret2 = vrf_switchback_to_initial(); | |
556 | if (ret2 < 0) | |
996c9314 LB |
557 | zlog_err("%s: Can't switchback from VRF %u (%s)", __func__, |
558 | vrf_id, safe_strerror(errno)); | |
2e0d2b3d | 559 | errno = save_errno; |
0f4977c6 PG |
560 | if (ret <= 0) |
561 | return ret; | |
562 | ret2 = vrf_bind(vrf_id, ret, interfacename); | |
563 | if (ret2 < 0) { | |
564 | close(ret); | |
565 | ret = ret2; | |
566 | } | |
d62a17ae | 567 | return ret; |
e5bf3e1e FL |
568 | } |
569 | ||
78dd30b2 PG |
570 | int vrf_is_backend_netns(void) |
571 | { | |
572 | return (vrf_backend == VRF_BACKEND_NETNS); | |
573 | } | |
574 | ||
575 | int vrf_get_backend(void) | |
576 | { | |
577 | return vrf_backend; | |
578 | } | |
579 | ||
580 | void vrf_configure_backend(int vrf_backend_netns) | |
581 | { | |
582 | vrf_backend = vrf_backend_netns; | |
583 | } | |
584 | ||
03aff2d8 PG |
585 | int vrf_handler_create(struct vty *vty, const char *vrfname, |
586 | struct vrf **vrf) | |
f30c50b9 | 587 | { |
d62a17ae | 588 | struct vrf *vrfp; |
f30c50b9 | 589 | |
d62a17ae | 590 | if (strlen(vrfname) > VRF_NAMSIZ) { |
697d3ec7 PG |
591 | if (vty) |
592 | vty_out(vty, | |
996c9314 LB |
593 | "%% VRF name %s invalid: length exceeds %d bytes\n", |
594 | vrfname, VRF_NAMSIZ); | |
697d3ec7 PG |
595 | else |
596 | zlog_warn( | |
996c9314 LB |
597 | "%% VRF name %s invalid: length exceeds %d bytes\n", |
598 | vrfname, VRF_NAMSIZ); | |
d62a17ae | 599 | return CMD_WARNING_CONFIG_FAILED; |
600 | } | |
f30c50b9 | 601 | |
d62a17ae | 602 | vrfp = vrf_get(VRF_UNKNOWN, vrfname); |
f30c50b9 | 603 | |
697d3ec7 PG |
604 | if (vty) |
605 | VTY_PUSH_CONTEXT(VRF_NODE, vrfp); | |
f30c50b9 | 606 | |
697d3ec7 PG |
607 | if (vrf) |
608 | *vrf = vrfp; | |
d62a17ae | 609 | return CMD_SUCCESS; |
f30c50b9 RW |
610 | } |
611 | ||
996c9314 | 612 | int vrf_netns_handler_create(struct vty *vty, struct vrf *vrf, char *pathname, |
03aff2d8 | 613 | ns_id_t ns_id, ns_id_t internal_ns_id) |
e26aedbe PG |
614 | { |
615 | struct ns *ns = NULL; | |
616 | ||
617 | if (!vrf) | |
618 | return CMD_WARNING_CONFIG_FAILED; | |
619 | if (vrf->vrf_id != VRF_UNKNOWN && vrf->ns_ctxt == NULL) { | |
620 | if (vty) | |
621 | vty_out(vty, | |
622 | "VRF %u is already configured with VRF %s\n", | |
623 | vrf->vrf_id, vrf->name); | |
624 | else | |
625 | zlog_warn("VRF %u is already configured with VRF %s\n", | |
626 | vrf->vrf_id, vrf->name); | |
627 | return CMD_WARNING_CONFIG_FAILED; | |
628 | } | |
629 | if (vrf->ns_ctxt != NULL) { | |
996c9314 | 630 | ns = (struct ns *)vrf->ns_ctxt; |
2e1cc436 | 631 | if (!strcmp(ns->name, pathname)) { |
e26aedbe PG |
632 | if (vty) |
633 | vty_out(vty, | |
996c9314 LB |
634 | "VRF %u already configured with NETNS %s\n", |
635 | vrf->vrf_id, ns->name); | |
e26aedbe PG |
636 | else |
637 | zlog_warn( | |
996c9314 LB |
638 | "VRF %u already configured with NETNS %s", |
639 | vrf->vrf_id, ns->name); | |
e26aedbe PG |
640 | return CMD_WARNING_CONFIG_FAILED; |
641 | } | |
642 | } | |
643 | ns = ns_lookup_name(pathname); | |
644 | if (ns && ns->vrf_ctxt) { | |
645 | struct vrf *vrf2 = (struct vrf *)ns->vrf_ctxt; | |
646 | ||
647 | if (vrf2 == vrf) | |
648 | return CMD_SUCCESS; | |
649 | if (vty) | |
996c9314 LB |
650 | vty_out(vty, |
651 | "NS %s is already configured" | |
e26aedbe | 652 | " with VRF %u(%s)\n", |
996c9314 | 653 | ns->name, vrf2->vrf_id, vrf2->name); |
e26aedbe PG |
654 | else |
655 | zlog_warn("NS %s is already configured with VRF %u(%s)", | |
656 | ns->name, vrf2->vrf_id, vrf2->name); | |
657 | return CMD_WARNING_CONFIG_FAILED; | |
658 | } | |
659 | ns = ns_get_created(ns, pathname, ns_id); | |
03aff2d8 | 660 | ns->internal_ns_id = internal_ns_id; |
e26aedbe PG |
661 | ns->vrf_ctxt = (void *)vrf; |
662 | vrf->ns_ctxt = (void *)ns; | |
663 | /* update VRF netns NAME */ | |
2e1cc436 | 664 | strlcpy(vrf->data.l.netns_name, basename(pathname), NS_NAMSIZ); |
e26aedbe PG |
665 | |
666 | if (!ns_enable(ns, vrf_update_vrf_id)) { | |
667 | if (vty) | |
668 | vty_out(vty, "Can not associate NS %u with NETNS %s\n", | |
996c9314 | 669 | ns->ns_id, ns->name); |
e26aedbe PG |
670 | else |
671 | zlog_warn("Can not associate NS %u with NETNS %s", | |
672 | ns->ns_id, ns->name); | |
673 | return CMD_WARNING_CONFIG_FAILED; | |
674 | } | |
675 | ||
676 | return CMD_SUCCESS; | |
677 | } | |
678 | ||
ce1be369 PG |
679 | int vrf_is_mapped_on_netns(vrf_id_t vrf_id) |
680 | { | |
681 | struct vrf *vrf = vrf_lookup_by_id(vrf_id); | |
682 | ||
683 | if (!vrf || vrf->data.l.netns_name[0] == '\0') | |
684 | return 0; | |
685 | if (vrf->vrf_id == VRF_DEFAULT) | |
686 | return 0; | |
687 | return 1; | |
688 | } | |
689 | ||
697d3ec7 | 690 | /* vrf CLI commands */ |
16d6ea59 QY |
691 | DEFUN_NOSH(vrf_exit, |
692 | vrf_exit_cmd, | |
693 | "exit-vrf", | |
694 | "Exit current mode and down to previous mode\n") | |
695 | { | |
696 | /* We have to set vrf context to default vrf */ | |
697 | VTY_PUSH_CONTEXT(VRF_NODE, vrf_get(VRF_DEFAULT, VRF_DEFAULT_NAME)); | |
698 | vty->node = CONFIG_NODE; | |
699 | return CMD_SUCCESS; | |
700 | } | |
701 | ||
697d3ec7 PG |
702 | DEFUN_NOSH (vrf, |
703 | vrf_cmd, | |
704 | "vrf NAME", | |
705 | "Select a VRF to configure\n" | |
706 | "VRF's name\n") | |
707 | { | |
708 | int idx_name = 1; | |
709 | const char *vrfname = argv[idx_name]->arg; | |
710 | ||
711 | return vrf_handler_create(vty, vrfname, NULL); | |
712 | } | |
713 | ||
f30c50b9 RW |
714 | DEFUN_NOSH (no_vrf, |
715 | no_vrf_cmd, | |
d7a75a6c | 716 | "no vrf NAME", |
f30c50b9 RW |
717 | NO_STR |
718 | "Delete a pseudo VRF's configuration\n" | |
719 | "VRF's name\n") | |
720 | { | |
d62a17ae | 721 | const char *vrfname = argv[2]->arg; |
53dc2b05 | 722 | |
d62a17ae | 723 | struct vrf *vrfp; |
f30c50b9 | 724 | |
d62a17ae | 725 | vrfp = vrf_lookup_by_name(vrfname); |
f30c50b9 | 726 | |
d62a17ae | 727 | if (vrfp == NULL) { |
728 | vty_out(vty, "%% VRF %s does not exist\n", vrfname); | |
729 | return CMD_WARNING_CONFIG_FAILED; | |
730 | } | |
f30c50b9 | 731 | |
d62a17ae | 732 | if (CHECK_FLAG(vrfp->status, VRF_ACTIVE)) { |
733 | vty_out(vty, "%% Only inactive VRFs can be deleted\n"); | |
734 | return CMD_WARNING_CONFIG_FAILED; | |
735 | } | |
f30c50b9 | 736 | |
84915b0a | 737 | /* Clear configured flag and invoke delete. */ |
738 | UNSET_FLAG(vrfp->status, VRF_CONFIGURED); | |
d62a17ae | 739 | vrf_delete(vrfp); |
f30c50b9 | 740 | |
d62a17ae | 741 | return CMD_SUCCESS; |
f30c50b9 RW |
742 | } |
743 | ||
53dc2b05 | 744 | |
d62a17ae | 745 | struct cmd_node vrf_node = {VRF_NODE, "%s(config-vrf)# ", 1}; |
7ddcfca4 | 746 | |
4a541e8c PG |
747 | DEFUN (vrf_netns, |
748 | vrf_netns_cmd, | |
749 | "netns NAME", | |
750 | "Attach VRF to a Namespace\n" | |
751 | "The file name in " NS_RUN_DIR ", or a full pathname\n") | |
e26aedbe | 752 | { |
3bc34908 | 753 | int idx_name = 1, ret; |
e26aedbe PG |
754 | char *pathname = ns_netns_pathname(vty, argv[idx_name]->arg); |
755 | ||
756 | VTY_DECLVAR_CONTEXT(vrf, vrf); | |
757 | ||
758 | if (!pathname) | |
759 | return CMD_WARNING_CONFIG_FAILED; | |
3bc34908 PG |
760 | |
761 | if (vrf_daemon_privs && | |
762 | vrf_daemon_privs->change(ZPRIVS_RAISE)) | |
763 | zlog_err("%s: Can't raise privileges", __func__); | |
764 | ||
03aff2d8 PG |
765 | ret = vrf_netns_handler_create(vty, vrf, pathname, |
766 | NS_UNKNOWN, NS_UNKNOWN); | |
3bc34908 PG |
767 | |
768 | if (vrf_daemon_privs && | |
769 | vrf_daemon_privs->change(ZPRIVS_LOWER)) | |
770 | zlog_err("%s: Can't lower privileges", __func__); | |
771 | return ret; | |
e26aedbe PG |
772 | } |
773 | ||
774 | DEFUN (no_vrf_netns, | |
775 | no_vrf_netns_cmd, | |
776 | "no netns [NAME]", | |
777 | NO_STR | |
778 | "Detach VRF from a Namespace\n" | |
779 | "The file name in " NS_RUN_DIR ", or a full pathname\n") | |
780 | { | |
781 | struct ns *ns = NULL; | |
782 | ||
783 | VTY_DECLVAR_CONTEXT(vrf, vrf); | |
784 | ||
785 | if (!vrf_is_backend_netns()) { | |
786 | vty_out(vty, "VRF backend is not Netns. Aborting\n"); | |
787 | return CMD_WARNING_CONFIG_FAILED; | |
788 | } | |
789 | if (!vrf->ns_ctxt) { | |
790 | vty_out(vty, "VRF %s(%u) is not configured with NetNS\n", | |
791 | vrf->name, vrf->vrf_id); | |
792 | return CMD_WARNING_CONFIG_FAILED; | |
793 | } | |
794 | ||
795 | ns = (struct ns *)vrf->ns_ctxt; | |
796 | ||
797 | ns->vrf_ctxt = NULL; | |
798 | vrf_disable(vrf); | |
799 | /* vrf ID from VRF is necessary for Zebra | |
800 | * so that propagate to other clients is done | |
801 | */ | |
802 | ns_delete(ns); | |
803 | vrf->ns_ctxt = NULL; | |
804 | return CMD_SUCCESS; | |
805 | } | |
806 | ||
19dc275e DS |
807 | /* |
808 | * Debug CLI for vrf's | |
809 | */ | |
810 | DEFUN (vrf_debug, | |
811 | vrf_debug_cmd, | |
812 | "debug vrf", | |
813 | DEBUG_STR | |
814 | "VRF Debugging\n") | |
815 | { | |
d62a17ae | 816 | debug_vrf = 1; |
19dc275e | 817 | |
d62a17ae | 818 | return CMD_SUCCESS; |
19dc275e DS |
819 | } |
820 | ||
821 | DEFUN (no_vrf_debug, | |
822 | no_vrf_debug_cmd, | |
823 | "no debug vrf", | |
824 | NO_STR | |
825 | DEBUG_STR | |
826 | "VRF Debugging\n") | |
827 | { | |
d62a17ae | 828 | debug_vrf = 0; |
19dc275e | 829 | |
d62a17ae | 830 | return CMD_SUCCESS; |
19dc275e DS |
831 | } |
832 | ||
d62a17ae | 833 | static int vrf_write_host(struct vty *vty) |
19dc275e | 834 | { |
d62a17ae | 835 | if (debug_vrf) |
836 | vty_out(vty, "debug vrf\n"); | |
19dc275e | 837 | |
d62a17ae | 838 | return 1; |
19dc275e DS |
839 | } |
840 | ||
d62a17ae | 841 | static struct cmd_node vrf_debug_node = {VRF_DEBUG_NODE, "", 1}; |
19dc275e | 842 | |
d62a17ae | 843 | void vrf_install_commands(void) |
19dc275e | 844 | { |
d62a17ae | 845 | install_node(&vrf_debug_node, vrf_write_host); |
19dc275e | 846 | |
d62a17ae | 847 | install_element(CONFIG_NODE, &vrf_debug_cmd); |
848 | install_element(ENABLE_NODE, &vrf_debug_cmd); | |
849 | install_element(CONFIG_NODE, &no_vrf_debug_cmd); | |
850 | install_element(ENABLE_NODE, &no_vrf_debug_cmd); | |
19dc275e | 851 | } |
53dc2b05 | 852 | |
3bc34908 PG |
853 | void vrf_cmd_init(int (*writefunc)(struct vty *vty), |
854 | struct zebra_privs_t *daemon_privs) | |
7ddcfca4 | 855 | { |
d62a17ae | 856 | install_element(CONFIG_NODE, &vrf_cmd); |
857 | install_element(CONFIG_NODE, &no_vrf_cmd); | |
858 | install_node(&vrf_node, writefunc); | |
859 | install_default(VRF_NODE); | |
16d6ea59 | 860 | install_element(VRF_NODE, &vrf_exit_cmd); |
e26aedbe PG |
861 | if (vrf_is_backend_netns() && ns_have_netns()) { |
862 | /* Install NS commands. */ | |
3bc34908 | 863 | vrf_daemon_privs = daemon_privs; |
e26aedbe PG |
864 | install_element(VRF_NODE, &vrf_netns_cmd); |
865 | install_element(VRF_NODE, &no_vrf_netns_cmd); | |
866 | } | |
19dc275e | 867 | } |
ec31f30d PG |
868 | |
869 | vrf_id_t vrf_get_default_id(void) | |
870 | { | |
871 | struct vrf *vrf = vrf_lookup_by_name(VRF_DEFAULT_NAME); | |
872 | ||
873 | if (vrf) | |
874 | return vrf->vrf_id; | |
03aff2d8 PG |
875 | /* backend netns is only known by zebra |
876 | * for other daemons, we return VRF_DEFAULT_INTERNAL | |
877 | */ | |
ec31f30d PG |
878 | if (vrf_is_backend_netns()) |
879 | return ns_get_default_id(); | |
880 | else | |
881 | return VRF_DEFAULT_INTERNAL; | |
882 | } | |
2e0d2b3d | 883 | |
0f4977c6 PG |
884 | int vrf_bind(vrf_id_t vrf_id, int fd, char *name) |
885 | { | |
886 | int ret = 0; | |
887 | ||
888 | if (fd < 0 || name == NULL) | |
889 | return fd; | |
890 | if (vrf_is_mapped_on_netns(vrf_id)) | |
891 | return fd; | |
892 | #ifdef SO_BINDTODEVICE | |
c9c70dd1 | 893 | ret = setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, name, strlen(name)+1); |
0f4977c6 | 894 | if (ret < 0) |
996c9314 LB |
895 | zlog_debug("bind to interface %s failed, errno=%d", name, |
896 | errno); | |
0f4977c6 PG |
897 | #endif /* SO_BINDTODEVICE */ |
898 | return ret; | |
899 | } | |
2e0d2b3d | 900 | int vrf_getaddrinfo(const char *node, const char *service, |
996c9314 LB |
901 | const struct addrinfo *hints, struct addrinfo **res, |
902 | vrf_id_t vrf_id) | |
2e0d2b3d PG |
903 | { |
904 | int ret, ret2, save_errno; | |
905 | ||
906 | ret = vrf_switch_to_netns(vrf_id); | |
907 | if (ret < 0) | |
996c9314 LB |
908 | zlog_err("%s: Can't switch to VRF %u (%s)", __func__, vrf_id, |
909 | safe_strerror(errno)); | |
2e0d2b3d PG |
910 | ret = getaddrinfo(node, service, hints, res); |
911 | save_errno = errno; | |
912 | ret2 = vrf_switchback_to_initial(); | |
913 | if (ret2 < 0) | |
996c9314 LB |
914 | zlog_err("%s: Can't switchback from VRF %u (%s)", __func__, |
915 | vrf_id, safe_strerror(errno)); | |
2e0d2b3d PG |
916 | errno = save_errno; |
917 | return ret; | |
918 | } | |
919 | ||
516d7591 PG |
920 | int vrf_ioctl(vrf_id_t vrf_id, int d, unsigned long request, char *params) |
921 | { | |
922 | int ret, saved_errno, rc; | |
923 | ||
924 | ret = vrf_switch_to_netns(vrf_id); | |
925 | if (ret < 0) { | |
996c9314 LB |
926 | zlog_err("%s: Can't switch to VRF %u (%s)", __func__, vrf_id, |
927 | safe_strerror(errno)); | |
516d7591 PG |
928 | return 0; |
929 | } | |
930 | rc = ioctl(d, request, params); | |
931 | saved_errno = errno; | |
932 | ret = vrf_switchback_to_initial(); | |
933 | if (ret < 0) | |
996c9314 LB |
934 | zlog_err("%s: Can't switchback from VRF %u (%s)", __func__, |
935 | vrf_id, safe_strerror(errno)); | |
516d7591 PG |
936 | errno = saved_errno; |
937 | return rc; | |
938 | } | |
939 | ||
0f4977c6 PG |
940 | int vrf_sockunion_socket(const union sockunion *su, vrf_id_t vrf_id, |
941 | char *interfacename) | |
2e0d2b3d PG |
942 | { |
943 | int ret, save_errno, ret2; | |
944 | ||
945 | ret = vrf_switch_to_netns(vrf_id); | |
946 | if (ret < 0) | |
996c9314 LB |
947 | zlog_err("%s: Can't switch to VRF %u (%s)", __func__, vrf_id, |
948 | safe_strerror(errno)); | |
2e0d2b3d PG |
949 | ret = sockunion_socket(su); |
950 | save_errno = errno; | |
951 | ret2 = vrf_switchback_to_initial(); | |
952 | if (ret2 < 0) | |
996c9314 LB |
953 | zlog_err("%s: Can't switchback from VRF %u (%s)", __func__, |
954 | vrf_id, safe_strerror(errno)); | |
2e0d2b3d | 955 | errno = save_errno; |
0f4977c6 PG |
956 | |
957 | if (ret <= 0) | |
958 | return ret; | |
959 | ret2 = vrf_bind(vrf_id, ret, interfacename); | |
960 | if (ret2 < 0) { | |
961 | close(ret); | |
962 | ret = ret2; | |
963 | } | |
2e0d2b3d PG |
964 | return ret; |
965 | } |