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7758e3f3 | 1 | /* Zebra MPLS code |
2 | * Copyright (C) 2013 Cumulus Networks, Inc. | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
896014f4 DL |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
7758e3f3 | 19 | */ |
20 | ||
21 | #include <zebra.h> | |
22 | ||
23 | #include "prefix.h" | |
24 | #include "table.h" | |
25 | #include "memory.h" | |
7758e3f3 | 26 | #include "command.h" |
27 | #include "if.h" | |
28 | #include "log.h" | |
29 | #include "sockunion.h" | |
30 | #include "linklist.h" | |
31 | #include "thread.h" | |
32 | #include "workqueue.h" | |
33 | #include "prefix.h" | |
34 | #include "routemap.h" | |
35 | #include "stream.h" | |
36 | #include "nexthop.h" | |
b78b820d | 37 | #include "lib/json.h" |
7758e3f3 | 38 | |
39 | #include "zebra/rib.h" | |
40 | #include "zebra/rt.h" | |
41 | #include "zebra/zserv.h" | |
42 | #include "zebra/redistribute.h" | |
43 | #include "zebra/debug.h" | |
44 | #include "zebra/zebra_memory.h" | |
45 | #include "zebra/zebra_vrf.h" | |
46 | #include "zebra/zebra_mpls.h" | |
47 | ||
48 | DEFINE_MTYPE_STATIC(ZEBRA, LSP, "MPLS LSP object") | |
f31e084c | 49 | DEFINE_MTYPE_STATIC(ZEBRA, FEC, "MPLS FEC object") |
7758e3f3 | 50 | DEFINE_MTYPE_STATIC(ZEBRA, SLSP, "MPLS static LSP config") |
40c7bdb0 | 51 | DEFINE_MTYPE_STATIC(ZEBRA, NHLFE, "MPLS nexthop object") |
7758e3f3 | 52 | DEFINE_MTYPE_STATIC(ZEBRA, SNHLFE, "MPLS static nexthop object") |
53 | DEFINE_MTYPE_STATIC(ZEBRA, SNHLFE_IFNAME, "MPLS static nexthop ifname") | |
54 | ||
fe6c7157 RW |
55 | int mpls_enabled; |
56 | ||
7758e3f3 | 57 | /* Default rtm_table for all clients */ |
58 | extern struct zebra_t zebrad; | |
59 | ||
60 | /* static function declarations */ | |
f31e084c | 61 | |
28d58fd7 VV |
62 | static void |
63 | fec_evaluate (struct zebra_vrf *zvrf, int add); | |
64 | static u_int32_t | |
65 | fec_derive_label_from_index (struct zebra_vrf *vrf, zebra_fec_t *fec); | |
a64448ba DS |
66 | static int |
67 | lsp_install (struct zebra_vrf *zvrf, mpls_label_t label, | |
68 | struct route_node *rn, struct rib *rib); | |
69 | static int | |
70 | lsp_uninstall (struct zebra_vrf *zvrf, mpls_label_t label); | |
71 | static int | |
72 | fec_change_update_lsp (struct zebra_vrf *zvrf, zebra_fec_t *fec, mpls_label_t old_label); | |
5aba114a DS |
73 | static int |
74 | fec_send (zebra_fec_t *fec, struct zserv *client); | |
75 | static void | |
76 | fec_update_clients (zebra_fec_t *fec); | |
f31e084c DS |
77 | static void |
78 | fec_print (zebra_fec_t *fec, struct vty *vty); | |
79 | static zebra_fec_t * | |
80 | fec_find (struct route_table *table, struct prefix *p); | |
81 | static zebra_fec_t * | |
a64448ba | 82 | fec_add (struct route_table *table, struct prefix *p, mpls_label_t label, |
28d58fd7 | 83 | u_int32_t flags, u_int32_t label_index); |
f31e084c DS |
84 | static int |
85 | fec_del (zebra_fec_t *fec); | |
86 | ||
7758e3f3 | 87 | static unsigned int |
88 | label_hash (void *p); | |
89 | static int | |
90 | label_cmp (const void *p1, const void *p2); | |
40c7bdb0 | 91 | static int |
92 | nhlfe_nexthop_active_ipv4 (zebra_nhlfe_t *nhlfe, struct nexthop *nexthop); | |
93 | static int | |
94 | nhlfe_nexthop_active_ipv6 (zebra_nhlfe_t *nhlfe, struct nexthop *nexthop); | |
95 | static int | |
96 | nhlfe_nexthop_active (zebra_nhlfe_t *nhlfe); | |
f31e084c | 97 | |
40c7bdb0 | 98 | static void |
99 | lsp_select_best_nhlfe (zebra_lsp_t *lsp); | |
100 | static void | |
101 | lsp_uninstall_from_kernel (struct hash_backet *backet, void *ctxt); | |
102 | static void | |
103 | lsp_schedule (struct hash_backet *backet, void *ctxt); | |
104 | static wq_item_status | |
105 | lsp_process (struct work_queue *wq, void *data); | |
106 | static void | |
107 | lsp_processq_del (struct work_queue *wq, void *data); | |
108 | static void | |
109 | lsp_processq_complete (struct work_queue *wq); | |
110 | static int | |
111 | lsp_processq_add (zebra_lsp_t *lsp); | |
112 | static void * | |
113 | lsp_alloc (void *p); | |
f31e084c | 114 | |
40c7bdb0 | 115 | static char * |
116 | nhlfe2str (zebra_nhlfe_t *nhlfe, char *buf, int size); | |
117 | static int | |
118 | nhlfe_nhop_match (zebra_nhlfe_t *nhlfe, enum nexthop_types_t gtype, | |
a64448ba | 119 | union g_addr *gate, ifindex_t ifindex); |
40c7bdb0 | 120 | static zebra_nhlfe_t * |
121 | nhlfe_find (zebra_lsp_t *lsp, enum lsp_types_t lsp_type, | |
122 | enum nexthop_types_t gtype, union g_addr *gate, | |
a64448ba | 123 | ifindex_t ifindex); |
40c7bdb0 | 124 | static zebra_nhlfe_t * |
125 | nhlfe_add (zebra_lsp_t *lsp, enum lsp_types_t lsp_type, | |
126 | enum nexthop_types_t gtype, union g_addr *gate, | |
a64448ba | 127 | ifindex_t ifindex, mpls_label_t out_label); |
40c7bdb0 | 128 | static int |
129 | nhlfe_del (zebra_nhlfe_t *snhlfe); | |
a64448ba DS |
130 | static void |
131 | nhlfe_out_label_update (zebra_nhlfe_t *nhlfe, struct nexthop_label *nh_label); | |
40c7bdb0 | 132 | static int |
ce549947 RW |
133 | mpls_lsp_uninstall_all (struct hash *lsp_table, zebra_lsp_t *lsp, |
134 | enum lsp_types_t type); | |
40c7bdb0 | 135 | static int |
ce549947 | 136 | mpls_static_lsp_uninstall_all (struct zebra_vrf *zvrf, mpls_label_t in_label); |
7758e3f3 | 137 | static void |
3ab18ff2 | 138 | nhlfe_print (zebra_nhlfe_t *nhlfe, struct vty *vty); |
139 | static void | |
140 | lsp_print (zebra_lsp_t *lsp, void *ctxt); | |
7758e3f3 | 141 | static void * |
142 | slsp_alloc (void *p); | |
143 | static int | |
144 | snhlfe_match (zebra_snhlfe_t *snhlfe, enum nexthop_types_t gtype, | |
a64448ba | 145 | union g_addr *gate, ifindex_t ifindex); |
7758e3f3 | 146 | static zebra_snhlfe_t * |
147 | snhlfe_find (zebra_slsp_t *slsp, enum nexthop_types_t gtype, | |
a64448ba | 148 | union g_addr *gate, ifindex_t ifindex); |
7758e3f3 | 149 | static zebra_snhlfe_t * |
150 | snhlfe_add (zebra_slsp_t *slsp, enum nexthop_types_t gtype, | |
a64448ba | 151 | union g_addr *gate, ifindex_t ifindex, mpls_label_t out_label); |
7758e3f3 | 152 | static int |
153 | snhlfe_del (zebra_snhlfe_t *snhlfe); | |
154 | static int | |
155 | snhlfe_del_all (zebra_slsp_t *slsp); | |
156 | static char * | |
157 | snhlfe2str (zebra_snhlfe_t *snhlfe, char *buf, int size); | |
33c32282 | 158 | static int |
40c7bdb0 | 159 | mpls_processq_init (struct zebra_t *zebra); |
7758e3f3 | 160 | |
161 | ||
162 | ||
163 | ||
164 | /* Static functions */ | |
165 | ||
a64448ba DS |
166 | /* |
167 | * Install label forwarding entry based on labeled-route entry. | |
168 | */ | |
169 | static int | |
170 | lsp_install (struct zebra_vrf *zvrf, mpls_label_t label, | |
171 | struct route_node *rn, struct rib *rib) | |
172 | { | |
173 | struct hash *lsp_table; | |
174 | zebra_ile_t tmp_ile; | |
175 | zebra_lsp_t *lsp; | |
176 | zebra_nhlfe_t *nhlfe; | |
177 | struct nexthop *nexthop; | |
178 | enum lsp_types_t lsp_type; | |
179 | char buf[BUFSIZ]; | |
180 | int added, changed; | |
181 | ||
182 | /* Lookup table. */ | |
183 | lsp_table = zvrf->lsp_table; | |
184 | if (!lsp_table) | |
185 | return -1; | |
186 | ||
a64448ba DS |
187 | lsp_type = lsp_type_from_rib_type (rib->type); |
188 | added = changed = 0; | |
189 | ||
190 | /* Locate or allocate LSP entry. */ | |
191 | tmp_ile.in_label = label; | |
192 | lsp = hash_get (lsp_table, &tmp_ile, lsp_alloc); | |
193 | if (!lsp) | |
194 | return -1; | |
195 | ||
196 | /* For each active nexthop, create NHLFE. Note that we deliberately skip | |
197 | * recursive nexthops right now, because intermediate hops won't understand | |
198 | * the label advertised by the recursive nexthop (plus we don't have the | |
199 | * logic yet to push multiple labels). | |
200 | */ | |
201 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
202 | { | |
203 | /* Skip inactive and recursive entries. */ | |
204 | if (!CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
205 | continue; | |
206 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
207 | continue; | |
208 | ||
209 | nhlfe = nhlfe_find (lsp, lsp_type, nexthop->type, &nexthop->gate, | |
210 | nexthop->ifindex); | |
211 | if (nhlfe) | |
212 | { | |
213 | /* Clear deleted flag (in case it was set) */ | |
214 | UNSET_FLAG (nhlfe->flags, NHLFE_FLAG_DELETED); | |
215 | if (nexthop_labels_match (nhlfe->nexthop, nexthop)) | |
216 | /* No change */ | |
217 | continue; | |
218 | ||
219 | ||
220 | if (IS_ZEBRA_DEBUG_MPLS) | |
221 | { | |
222 | nhlfe2str (nhlfe, buf, BUFSIZ); | |
223 | zlog_debug ("LSP in-label %u type %d nexthop %s " | |
224 | "out-label changed", | |
225 | lsp->ile.in_label, lsp_type, buf); | |
226 | } | |
227 | ||
228 | /* Update out label, trigger processing. */ | |
229 | nhlfe_out_label_update (nhlfe, nexthop->nh_label); | |
230 | SET_FLAG (nhlfe->flags, NHLFE_FLAG_CHANGED); | |
231 | changed++; | |
232 | } | |
233 | else | |
234 | { | |
235 | /* Add LSP entry to this nexthop */ | |
236 | nhlfe = nhlfe_add (lsp, lsp_type, nexthop->type, | |
237 | &nexthop->gate, nexthop->ifindex, | |
238 | nexthop->nh_label->label[0]); | |
239 | if (!nhlfe) | |
240 | return -1; | |
241 | ||
242 | if (IS_ZEBRA_DEBUG_MPLS) | |
243 | { | |
244 | nhlfe2str (nhlfe, buf, BUFSIZ); | |
245 | zlog_debug ("Add LSP in-label %u type %d nexthop %s " | |
246 | "out-label %u", | |
247 | lsp->ile.in_label, lsp_type, buf, | |
248 | nexthop->nh_label->label[0]); | |
249 | } | |
250 | ||
251 | lsp->addr_family = NHLFE_FAMILY (nhlfe); | |
252 | ||
253 | /* Mark NHLFE as changed. */ | |
254 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_CHANGED); | |
255 | added++; | |
256 | } | |
257 | } | |
258 | ||
259 | /* Queue LSP for processing if necessary. If no NHLFE got added (special | |
260 | * case), delete the LSP entry; this case results in somewhat ugly logging. | |
261 | */ | |
262 | if (added || changed) | |
263 | { | |
264 | if (lsp_processq_add (lsp)) | |
265 | return -1; | |
266 | } | |
267 | else if (!lsp->nhlfe_list && | |
268 | !CHECK_FLAG (lsp->flags, LSP_FLAG_SCHEDULED)) | |
269 | { | |
270 | if (IS_ZEBRA_DEBUG_MPLS) | |
271 | zlog_debug ("Free LSP in-label %u flags 0x%x", | |
272 | lsp->ile.in_label, lsp->flags); | |
273 | ||
274 | lsp = hash_release(lsp_table, &lsp->ile); | |
275 | if (lsp) | |
276 | XFREE(MTYPE_LSP, lsp); | |
277 | } | |
278 | ||
279 | return 0; | |
280 | } | |
281 | ||
282 | /* | |
283 | * Uninstall all non-static NHLFEs of a label forwarding entry. If all | |
284 | * NHLFEs are removed, the entire entry is deleted. | |
285 | */ | |
286 | static int | |
287 | lsp_uninstall (struct zebra_vrf *zvrf, mpls_label_t label) | |
288 | { | |
289 | struct hash *lsp_table; | |
290 | zebra_ile_t tmp_ile; | |
291 | zebra_lsp_t *lsp; | |
292 | zebra_nhlfe_t *nhlfe, *nhlfe_next; | |
293 | char buf[BUFSIZ]; | |
294 | ||
295 | /* Lookup table. */ | |
296 | lsp_table = zvrf->lsp_table; | |
297 | if (!lsp_table) | |
298 | return -1; | |
299 | ||
300 | /* If entry is not present, exit. */ | |
301 | tmp_ile.in_label = label; | |
302 | lsp = hash_lookup (lsp_table, &tmp_ile); | |
303 | if (!lsp || !lsp->nhlfe_list) | |
304 | return 0; | |
305 | ||
306 | /* Mark NHLFEs for delete or directly delete, as appropriate. */ | |
307 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe_next) | |
308 | { | |
309 | nhlfe_next = nhlfe->next; | |
310 | ||
311 | /* Skip static NHLFEs */ | |
312 | if (nhlfe->type == ZEBRA_LSP_STATIC) | |
313 | continue; | |
314 | ||
315 | if (IS_ZEBRA_DEBUG_MPLS) | |
316 | { | |
317 | nhlfe2str (nhlfe, buf, BUFSIZ); | |
318 | zlog_debug ("Del LSP in-label %u type %d nexthop %s flags 0x%x", | |
319 | label, nhlfe->type, buf, nhlfe->flags); | |
320 | } | |
321 | ||
322 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED)) | |
323 | { | |
324 | UNSET_FLAG (nhlfe->flags, NHLFE_FLAG_CHANGED); | |
325 | SET_FLAG (nhlfe->flags, NHLFE_FLAG_DELETED); | |
326 | } | |
327 | else | |
328 | { | |
329 | nhlfe_del (nhlfe); | |
330 | } | |
331 | } | |
332 | ||
333 | /* Queue LSP for processing, if needed, else delete. */ | |
334 | if (CHECK_FLAG(lsp->flags, LSP_FLAG_INSTALLED)) | |
335 | { | |
336 | if (lsp_processq_add (lsp)) | |
337 | return -1; | |
338 | } | |
339 | else if (!lsp->nhlfe_list && | |
340 | !CHECK_FLAG (lsp->flags, LSP_FLAG_SCHEDULED)) | |
341 | { | |
342 | if (IS_ZEBRA_DEBUG_MPLS) | |
343 | zlog_debug ("Del LSP in-label %u flags 0x%x", | |
344 | lsp->ile.in_label, lsp->flags); | |
345 | ||
346 | lsp = hash_release(lsp_table, &lsp->ile); | |
347 | if (lsp) | |
348 | XFREE(MTYPE_LSP, lsp); | |
349 | } | |
350 | ||
351 | return 0; | |
352 | } | |
353 | ||
28d58fd7 VV |
354 | /* |
355 | * This function is invoked upon change to label block configuration; it | |
356 | * will walk all registered FECs with label-index and appropriately update | |
357 | * their local labels and trigger client updates. | |
358 | */ | |
359 | static void | |
360 | fec_evaluate (struct zebra_vrf *zvrf, int add) | |
361 | { | |
362 | struct route_node *rn; | |
363 | zebra_fec_t *fec; | |
364 | u_int32_t old_label, new_label; | |
365 | int af; | |
366 | char buf[BUFSIZ]; | |
367 | ||
368 | for (af = AFI_IP; af < AFI_MAX; af++) | |
369 | { | |
95169c2f DS |
370 | if (zvrf->fec_table[af] == NULL) |
371 | continue; | |
372 | ||
28d58fd7 VV |
373 | for (rn = route_top(zvrf->fec_table[af]); rn; rn = route_next(rn)) |
374 | { | |
375 | if ((fec = rn->info) == NULL) | |
376 | continue; | |
377 | ||
378 | /* Skip configured FECs and those without a label index. */ | |
379 | if (fec->flags & FEC_FLAG_CONFIGURED || | |
380 | fec->label_index == MPLS_INVALID_LABEL_INDEX) | |
381 | continue; | |
382 | ||
383 | if (IS_ZEBRA_DEBUG_MPLS) | |
384 | prefix2str(&rn->p, buf, BUFSIZ); | |
385 | ||
386 | /* Save old label, determine new label. */ | |
387 | old_label = fec->label; | |
388 | if (add) | |
389 | { | |
390 | new_label = zvrf->mpls_srgb.start_label + fec->label_index; | |
391 | if (new_label >= zvrf->mpls_srgb.end_label) | |
392 | new_label = MPLS_INVALID_LABEL; | |
393 | } | |
394 | else | |
395 | new_label = MPLS_INVALID_LABEL; | |
396 | ||
397 | /* If label has changed, update FEC and clients. */ | |
398 | if (new_label == old_label) | |
399 | continue; | |
400 | ||
401 | if (IS_ZEBRA_DEBUG_MPLS) | |
402 | zlog_debug ("Update fec %s new label %u upon label block %s", | |
403 | buf, new_label, add ? "ADD" : "DEL"); | |
404 | ||
405 | fec->label = new_label; | |
406 | fec_update_clients (fec); | |
407 | ||
408 | /* Update label forwarding entries appropriately */ | |
409 | fec_change_update_lsp (zvrf, fec, old_label); | |
410 | } | |
411 | } | |
412 | } | |
413 | ||
414 | /* | |
415 | * Derive (if possible) and update the local label for the FEC based on | |
416 | * its label index. The index is "acceptable" if it falls within the | |
417 | * globally configured label block (SRGB). | |
418 | */ | |
419 | static u_int32_t | |
420 | fec_derive_label_from_index (struct zebra_vrf *zvrf, zebra_fec_t *fec) | |
421 | { | |
422 | u_int32_t label; | |
423 | ||
424 | if (fec->label_index != MPLS_INVALID_LABEL_INDEX && | |
425 | zvrf->mpls_srgb.start_label && | |
426 | ((label = zvrf->mpls_srgb.start_label + fec->label_index) < | |
427 | zvrf->mpls_srgb.end_label)) | |
428 | fec->label = label; | |
429 | else | |
430 | fec->label = MPLS_INVALID_LABEL; | |
431 | ||
432 | return fec->label; | |
433 | } | |
434 | ||
a64448ba DS |
435 | /* |
436 | * There is a change for this FEC. Install or uninstall label forwarding | |
437 | * entries, as appropriate. | |
438 | */ | |
439 | static int | |
440 | fec_change_update_lsp (struct zebra_vrf *zvrf, zebra_fec_t *fec, mpls_label_t old_label) | |
441 | { | |
442 | struct route_table *table; | |
443 | struct route_node *rn; | |
444 | struct rib *rib; | |
445 | afi_t afi; | |
446 | ||
447 | /* Uninstall label forwarding entry, if previously installed. */ | |
448 | if (old_label != MPLS_INVALID_LABEL && | |
449 | old_label != MPLS_IMP_NULL_LABEL) | |
450 | lsp_uninstall (zvrf, old_label); | |
451 | ||
452 | /* Install label forwarding entry corr. to new label, if needed. */ | |
453 | if (fec->label == MPLS_INVALID_LABEL || | |
454 | fec->label == MPLS_IMP_NULL_LABEL) | |
455 | return 0; | |
456 | ||
457 | afi = family2afi(PREFIX_FAMILY(&fec->rn->p)); | |
458 | table = zebra_vrf_table (afi, SAFI_UNICAST, zvrf_id (zvrf)); | |
459 | if (!table) | |
460 | return 0; | |
461 | ||
462 | /* See if labeled route exists. */ | |
463 | rn = route_node_lookup (table, &fec->rn->p); | |
464 | if (!rn) | |
465 | return 0; | |
466 | ||
467 | RNODE_FOREACH_RIB (rn, rib) | |
468 | { | |
469 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) | |
470 | break; | |
471 | } | |
472 | ||
473 | if (!rib || !zebra_rib_labeled_unicast (rib)) | |
474 | return 0; | |
475 | ||
476 | if (lsp_install (zvrf, fec->label, rn, rib)) | |
477 | return -1; | |
478 | ||
479 | return 0; | |
480 | } | |
481 | ||
5aba114a DS |
482 | /* |
483 | * Inform about FEC to a registered client. | |
484 | */ | |
485 | static int | |
486 | fec_send (zebra_fec_t *fec, struct zserv *client) | |
487 | { | |
488 | struct stream *s; | |
489 | struct route_node *rn; | |
490 | ||
491 | rn = fec->rn; | |
492 | ||
493 | /* Get output stream. */ | |
494 | s = client->obuf; | |
495 | stream_reset (s); | |
496 | ||
497 | zserv_create_header (s, ZEBRA_FEC_UPDATE, VRF_DEFAULT); | |
498 | ||
499 | stream_putw(s, rn->p.family); | |
500 | stream_put_prefix (s, &rn->p); | |
501 | stream_putl(s, fec->label); | |
502 | stream_putw_at(s, 0, stream_get_endp(s)); | |
503 | return zebra_server_send_message(client); | |
504 | } | |
505 | ||
506 | /* | |
507 | * Update all registered clients about this FEC. Caller should've updated | |
508 | * FEC and ensure no duplicate updates. | |
509 | */ | |
510 | static void | |
511 | fec_update_clients (zebra_fec_t *fec) | |
512 | { | |
513 | struct listnode *node; | |
514 | struct zserv *client; | |
515 | ||
516 | for (ALL_LIST_ELEMENTS_RO(fec->client_list, node, client)) | |
517 | { | |
518 | if (IS_ZEBRA_DEBUG_MPLS) | |
519 | zlog_debug ("Update client %s", zebra_route_string(client->proto)); | |
520 | fec_send(fec, client); | |
521 | } | |
522 | } | |
523 | ||
524 | ||
f31e084c DS |
525 | /* |
526 | * Print a FEC-label binding entry. | |
527 | */ | |
528 | static void | |
529 | fec_print (zebra_fec_t *fec, struct vty *vty) | |
530 | { | |
531 | struct route_node *rn; | |
5aba114a DS |
532 | struct listnode *node; |
533 | struct zserv *client; | |
f31e084c DS |
534 | char buf[BUFSIZ]; |
535 | ||
536 | rn = fec->rn; | |
537 | prefix2str(&rn->p, buf, BUFSIZ); | |
538 | vty_out(vty, "%s%s", buf, VTY_NEWLINE); | |
539 | vty_out(vty, " Label: %s", label2str(fec->label, buf, BUFSIZ)); | |
28d58fd7 VV |
540 | if (fec->label_index != MPLS_INVALID_LABEL_INDEX) |
541 | vty_out(vty, ", Label Index: %u", fec->label_index); | |
f31e084c | 542 | vty_out(vty, "%s", VTY_NEWLINE); |
5aba114a DS |
543 | if (!list_isempty(fec->client_list)) |
544 | { | |
545 | vty_out(vty, " Client list:"); | |
546 | for (ALL_LIST_ELEMENTS_RO(fec->client_list, node, client)) | |
547 | vty_out(vty, " %s(fd %d)", | |
548 | zebra_route_string(client->proto), client->sock); | |
549 | vty_out(vty, "%s", VTY_NEWLINE); | |
550 | } | |
f31e084c DS |
551 | } |
552 | ||
553 | /* | |
554 | * Locate FEC-label binding that matches with passed info. | |
555 | */ | |
556 | static zebra_fec_t * | |
557 | fec_find (struct route_table *table, struct prefix *p) | |
558 | { | |
559 | struct route_node *rn; | |
560 | ||
561 | apply_mask (p); | |
562 | rn = route_node_lookup(table, p); | |
563 | if (!rn) | |
564 | return NULL; | |
565 | ||
566 | route_unlock_node(rn); | |
567 | return (rn->info); | |
568 | } | |
569 | ||
570 | /* | |
5aba114a DS |
571 | * Add a FEC. This may be upon a client registering for a binding |
572 | * or when a binding is configured. | |
f31e084c DS |
573 | */ |
574 | static zebra_fec_t * | |
575 | fec_add (struct route_table *table, struct prefix *p, | |
28d58fd7 | 576 | mpls_label_t label, u_int32_t flags, u_int32_t label_index) |
f31e084c DS |
577 | { |
578 | struct route_node *rn; | |
579 | zebra_fec_t *fec; | |
580 | ||
581 | apply_mask (p); | |
582 | ||
583 | /* Lookup (or add) route node.*/ | |
584 | rn = route_node_get (table, p); | |
585 | if (!rn) | |
586 | return NULL; | |
587 | ||
588 | fec = rn->info; | |
589 | ||
590 | if (!fec) | |
591 | { | |
592 | fec = XCALLOC (MTYPE_FEC, sizeof(zebra_fec_t)); | |
593 | if (!fec) | |
594 | return NULL; | |
595 | ||
596 | rn->info = fec; | |
597 | fec->rn = rn; | |
598 | fec->label = label; | |
5aba114a | 599 | fec->client_list = list_new(); |
f31e084c DS |
600 | } |
601 | else | |
602 | route_unlock_node (rn); /* for the route_node_get */ | |
603 | ||
28d58fd7 | 604 | fec->label_index = label_index; |
f31e084c DS |
605 | fec->flags = flags; |
606 | ||
607 | return fec; | |
608 | } | |
609 | ||
610 | /* | |
5aba114a DS |
611 | * Delete a FEC. This may be upon the last client deregistering for |
612 | * a FEC and no binding exists or when the binding is deleted and there | |
613 | * are no registered clients. | |
f31e084c DS |
614 | */ |
615 | static int | |
616 | fec_del (zebra_fec_t *fec) | |
617 | { | |
5aba114a | 618 | list_free (fec->client_list); |
f31e084c DS |
619 | fec->rn->info = NULL; |
620 | route_unlock_node (fec->rn); | |
621 | XFREE (MTYPE_FEC, fec); | |
622 | return 0; | |
623 | } | |
624 | ||
7758e3f3 | 625 | /* |
626 | * Hash function for label. | |
627 | */ | |
628 | static unsigned int | |
629 | label_hash (void *p) | |
630 | { | |
631 | const zebra_ile_t *ile = p; | |
632 | ||
633 | return (jhash_1word(ile->in_label, 0)); | |
634 | } | |
635 | ||
636 | /* | |
637 | * Compare 2 LSP hash entries based on in-label. | |
638 | */ | |
639 | static int | |
640 | label_cmp (const void *p1, const void *p2) | |
641 | { | |
642 | const zebra_ile_t *ile1 = p1; | |
643 | const zebra_ile_t *ile2 = p2; | |
644 | ||
645 | return (ile1->in_label == ile2->in_label); | |
646 | } | |
647 | ||
40c7bdb0 | 648 | /* |
649 | * Check if an IPv4 nexthop for a NHLFE is active. Update nexthop based on | |
650 | * the passed flag. | |
651 | * NOTE: Looking only for connected routes right now. | |
652 | */ | |
653 | static int | |
654 | nhlfe_nexthop_active_ipv4 (zebra_nhlfe_t *nhlfe, struct nexthop *nexthop) | |
655 | { | |
656 | struct route_table *table; | |
657 | struct prefix_ipv4 p; | |
658 | struct route_node *rn; | |
659 | struct rib *match; | |
88d88a9c | 660 | struct nexthop *match_nh; |
40c7bdb0 | 661 | |
662 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, VRF_DEFAULT); | |
663 | if (!table) | |
664 | return 0; | |
665 | ||
666 | /* Lookup nexthop in IPv4 routing table. */ | |
667 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
668 | p.family = AF_INET; | |
669 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
670 | p.prefix = nexthop->gate.ipv4; | |
671 | ||
672 | rn = route_node_match (table, (struct prefix *) &p); | |
673 | if (!rn) | |
674 | return 0; | |
675 | ||
676 | route_unlock_node (rn); | |
677 | ||
678 | /* Locate a valid connected route. */ | |
679 | RNODE_FOREACH_RIB (rn, match) | |
680 | { | |
88d88a9c RW |
681 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED) || |
682 | !CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
683 | continue; | |
684 | ||
685 | for (match_nh = match->nexthop; match_nh; match_nh = match_nh->next) | |
686 | { | |
687 | if (match->type == ZEBRA_ROUTE_CONNECT || | |
688 | nexthop->ifindex == match_nh->ifindex) | |
689 | { | |
690 | nexthop->ifindex = match_nh->ifindex; | |
691 | return 1; | |
692 | } | |
693 | } | |
40c7bdb0 | 694 | } |
695 | ||
88d88a9c | 696 | return 0; |
40c7bdb0 | 697 | } |
698 | ||
699 | ||
700 | /* | |
701 | * Check if an IPv6 nexthop for a NHLFE is active. Update nexthop based on | |
702 | * the passed flag. | |
703 | * NOTE: Looking only for connected routes right now. | |
704 | */ | |
705 | static int | |
706 | nhlfe_nexthop_active_ipv6 (zebra_nhlfe_t *nhlfe, struct nexthop *nexthop) | |
707 | { | |
708 | struct route_table *table; | |
709 | struct prefix_ipv6 p; | |
710 | struct route_node *rn; | |
711 | struct rib *match; | |
712 | ||
713 | table = zebra_vrf_table (AFI_IP6, SAFI_UNICAST, VRF_DEFAULT); | |
714 | if (!table) | |
715 | return 0; | |
716 | ||
717 | /* Lookup nexthop in IPv6 routing table. */ | |
718 | memset (&p, 0, sizeof (struct prefix_ipv6)); | |
719 | p.family = AF_INET6; | |
720 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
721 | p.prefix = nexthop->gate.ipv6; | |
722 | ||
723 | rn = route_node_match (table, (struct prefix *) &p); | |
724 | if (!rn) | |
725 | return 0; | |
726 | ||
727 | route_unlock_node (rn); | |
728 | ||
729 | /* Locate a valid connected route. */ | |
730 | RNODE_FOREACH_RIB (rn, match) | |
731 | { | |
732 | if ((match->type == ZEBRA_ROUTE_CONNECT) && | |
733 | !CHECK_FLAG (match->status, RIB_ENTRY_REMOVED) && | |
734 | CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
735 | break; | |
736 | } | |
737 | ||
738 | if (!match || !match->nexthop) | |
739 | return 0; | |
740 | ||
741 | nexthop->ifindex = match->nexthop->ifindex; | |
742 | return 1; | |
743 | } | |
744 | ||
745 | ||
746 | /* | |
747 | * Check the nexthop reachability for a NHLFE and return if valid (reachable) | |
748 | * or not. | |
749 | * NOTE: Each NHLFE points to only 1 nexthop. | |
750 | */ | |
751 | static int | |
752 | nhlfe_nexthop_active (zebra_nhlfe_t *nhlfe) | |
753 | { | |
754 | struct nexthop *nexthop; | |
755 | struct interface *ifp; | |
756 | ||
757 | nexthop = nhlfe->nexthop; | |
758 | if (!nexthop) // unexpected | |
759 | return 0; | |
760 | ||
761 | /* Check on nexthop based on type. */ | |
762 | switch (nexthop->type) | |
763 | { | |
764 | case NEXTHOP_TYPE_IPV4: | |
88d88a9c | 765 | case NEXTHOP_TYPE_IPV4_IFINDEX: |
40c7bdb0 | 766 | if (nhlfe_nexthop_active_ipv4 (nhlfe, nexthop)) |
767 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
768 | else | |
769 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
770 | break; | |
771 | ||
772 | case NEXTHOP_TYPE_IPV6: | |
773 | if (nhlfe_nexthop_active_ipv6 (nhlfe, nexthop)) | |
774 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
775 | else | |
776 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
777 | break; | |
778 | ||
779 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
780 | if (IN6_IS_ADDR_LINKLOCAL (&nexthop->gate.ipv6)) | |
781 | { | |
7e2b7603 | 782 | ifp = if_lookup_by_index (nexthop->ifindex, VRF_DEFAULT); |
40c7bdb0 | 783 | if (ifp && if_is_operative(ifp)) |
784 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
785 | else | |
786 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
787 | } | |
788 | else | |
789 | { | |
790 | if (nhlfe_nexthop_active_ipv6 (nhlfe, nexthop)) | |
791 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
792 | else | |
793 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
794 | } | |
795 | break; | |
796 | ||
797 | default: | |
798 | break; | |
799 | } | |
800 | ||
801 | return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
802 | } | |
803 | ||
804 | /* | |
805 | * Walk through NHLFEs for a LSP forwarding entry, verify nexthop | |
806 | * reachability and select the best. Multipath entries are also | |
807 | * marked. This is invoked when an LSP scheduled for processing (due | |
808 | * to some change) is examined. | |
809 | */ | |
810 | static void | |
811 | lsp_select_best_nhlfe (zebra_lsp_t *lsp) | |
812 | { | |
813 | zebra_nhlfe_t *nhlfe; | |
814 | zebra_nhlfe_t *best; | |
815 | struct nexthop *nexthop; | |
816 | int changed = 0; | |
817 | ||
818 | if (!lsp) | |
819 | return; | |
820 | ||
821 | best = NULL; | |
822 | lsp->num_ecmp = 0; | |
823 | UNSET_FLAG (lsp->flags, LSP_FLAG_CHANGED); | |
824 | ||
825 | /* | |
826 | * First compute the best path, after checking nexthop status. We are only | |
827 | * concerned with non-deleted NHLFEs. | |
828 | */ | |
829 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) | |
830 | { | |
831 | /* Clear selection flags. */ | |
832 | UNSET_FLAG (nhlfe->flags, | |
833 | (NHLFE_FLAG_SELECTED | NHLFE_FLAG_MULTIPATH)); | |
834 | ||
835 | if (!CHECK_FLAG (nhlfe->flags, NHLFE_FLAG_DELETED) && | |
836 | nhlfe_nexthop_active (nhlfe)) | |
837 | { | |
838 | if (!best || (nhlfe->distance < best->distance)) | |
839 | best = nhlfe; | |
840 | } | |
841 | } | |
842 | ||
843 | lsp->best_nhlfe = best; | |
844 | if (!lsp->best_nhlfe) | |
845 | return; | |
846 | ||
847 | /* Mark best NHLFE as selected. */ | |
848 | SET_FLAG (lsp->best_nhlfe->flags, NHLFE_FLAG_SELECTED); | |
849 | ||
850 | /* | |
851 | * If best path exists, see if there is ECMP. While doing this, note if a | |
852 | * new (uninstalled) NHLFE has been selected, an installed entry that is | |
853 | * still selected has a change or an installed entry is to be removed. | |
854 | */ | |
855 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) | |
856 | { | |
857 | int nh_chg, nh_sel, nh_inst; | |
858 | ||
859 | nexthop = nhlfe->nexthop; | |
860 | if (!nexthop) // unexpected | |
861 | continue; | |
862 | ||
863 | if (!CHECK_FLAG (nhlfe->flags, NHLFE_FLAG_DELETED) && | |
864 | CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE) && | |
865 | (nhlfe->distance == lsp->best_nhlfe->distance)) | |
866 | { | |
867 | SET_FLAG (nhlfe->flags, NHLFE_FLAG_SELECTED); | |
868 | SET_FLAG (nhlfe->flags, NHLFE_FLAG_MULTIPATH); | |
869 | lsp->num_ecmp++; | |
870 | } | |
871 | ||
872 | if (CHECK_FLAG (lsp->flags, LSP_FLAG_INSTALLED) && | |
873 | !changed) | |
874 | { | |
875 | nh_chg = CHECK_FLAG (nhlfe->flags, NHLFE_FLAG_CHANGED); | |
876 | nh_sel = CHECK_FLAG (nhlfe->flags, NHLFE_FLAG_SELECTED); | |
877 | nh_inst = CHECK_FLAG (nhlfe->flags, NHLFE_FLAG_INSTALLED); | |
878 | ||
879 | if ((nh_sel && !nh_inst) || | |
880 | (nh_sel && nh_inst && nh_chg) || | |
881 | (nh_inst && !nh_sel)) | |
882 | changed = 1; | |
883 | } | |
884 | ||
885 | /* We have finished examining, clear changed flag. */ | |
886 | UNSET_FLAG (nhlfe->flags, NHLFE_FLAG_CHANGED); | |
887 | } | |
888 | ||
889 | if (changed) | |
890 | SET_FLAG (lsp->flags, LSP_FLAG_CHANGED); | |
891 | } | |
892 | ||
893 | /* | |
894 | * Delete LSP forwarding entry from kernel, if installed. Called upon | |
895 | * process exit. | |
896 | */ | |
897 | static void | |
898 | lsp_uninstall_from_kernel (struct hash_backet *backet, void *ctxt) | |
899 | { | |
900 | zebra_lsp_t *lsp; | |
901 | ||
902 | lsp = (zebra_lsp_t *) backet->data; | |
903 | if (CHECK_FLAG(lsp->flags, LSP_FLAG_INSTALLED)) | |
904 | kernel_del_lsp (lsp); | |
905 | } | |
906 | ||
907 | /* | |
908 | * Schedule LSP forwarding entry for processing. Called upon changes | |
909 | * that may impact LSPs such as nexthop / connected route changes. | |
910 | */ | |
911 | static void | |
912 | lsp_schedule (struct hash_backet *backet, void *ctxt) | |
913 | { | |
914 | zebra_lsp_t *lsp; | |
915 | ||
916 | lsp = (zebra_lsp_t *) backet->data; | |
917 | lsp_processq_add (lsp); | |
918 | } | |
919 | ||
920 | /* | |
921 | * Process a LSP entry that is in the queue. Recalculate best NHLFE and | |
922 | * any multipaths and update or delete from the kernel, as needed. | |
923 | */ | |
924 | static wq_item_status | |
925 | lsp_process (struct work_queue *wq, void *data) | |
926 | { | |
927 | zebra_lsp_t *lsp; | |
928 | zebra_nhlfe_t *oldbest, *newbest; | |
929 | char buf[BUFSIZ], buf2[BUFSIZ]; | |
930 | ||
931 | lsp = (zebra_lsp_t *)data; | |
932 | if (!lsp) // unexpected | |
933 | return WQ_SUCCESS; | |
934 | ||
935 | oldbest = lsp->best_nhlfe; | |
936 | ||
937 | /* Select best NHLFE(s) */ | |
938 | lsp_select_best_nhlfe (lsp); | |
939 | ||
940 | newbest = lsp->best_nhlfe; | |
941 | ||
942 | if (IS_ZEBRA_DEBUG_MPLS) | |
943 | { | |
944 | if (oldbest) | |
945 | nhlfe2str (oldbest, buf, BUFSIZ); | |
946 | if (newbest) | |
947 | nhlfe2str (newbest, buf2, BUFSIZ); | |
948 | zlog_debug ("Process LSP in-label %u oldbest %s newbest %s " | |
949 | "flags 0x%x ecmp# %d", | |
950 | lsp->ile.in_label, oldbest ? buf : "NULL", | |
951 | newbest ? buf2 : "NULL", lsp->flags, lsp->num_ecmp); | |
952 | } | |
953 | ||
954 | if (!CHECK_FLAG (lsp->flags, LSP_FLAG_INSTALLED)) | |
955 | { | |
956 | /* Not already installed */ | |
957 | if (newbest) | |
958 | kernel_add_lsp (lsp); | |
959 | } | |
960 | else | |
961 | { | |
962 | /* Installed, may need an update and/or delete. */ | |
963 | if (!newbest) | |
964 | kernel_del_lsp (lsp); | |
965 | else if (CHECK_FLAG (lsp->flags, LSP_FLAG_CHANGED)) | |
966 | kernel_upd_lsp (lsp); | |
967 | } | |
968 | ||
969 | return WQ_SUCCESS; | |
970 | } | |
971 | ||
972 | ||
973 | /* | |
974 | * Callback upon processing completion of a LSP forwarding entry. | |
975 | */ | |
976 | static void | |
977 | lsp_processq_del (struct work_queue *wq, void *data) | |
978 | { | |
979 | struct zebra_vrf *zvrf; | |
980 | zebra_lsp_t *lsp; | |
981 | struct hash *lsp_table; | |
982 | zebra_nhlfe_t *nhlfe, *nhlfe_next; | |
983 | ||
984 | zvrf = vrf_info_lookup(VRF_DEFAULT); | |
985 | assert (zvrf); | |
986 | ||
987 | lsp_table = zvrf->lsp_table; | |
988 | if (!lsp_table) // unexpected | |
989 | return; | |
990 | ||
991 | lsp = (zebra_lsp_t *)data; | |
992 | if (!lsp) // unexpected | |
993 | return; | |
994 | ||
995 | /* Clear flag, remove any NHLFEs marked for deletion. If no NHLFEs exist, | |
996 | * delete LSP entry also. | |
997 | */ | |
998 | UNSET_FLAG (lsp->flags, LSP_FLAG_SCHEDULED); | |
999 | ||
1000 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe_next) | |
1001 | { | |
1002 | nhlfe_next = nhlfe->next; | |
1003 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_DELETED)) | |
1004 | nhlfe_del (nhlfe); | |
1005 | } | |
1006 | ||
1007 | if (!lsp->nhlfe_list) | |
1008 | { | |
1009 | if (IS_ZEBRA_DEBUG_MPLS) | |
1010 | zlog_debug ("Free LSP in-label %u flags 0x%x", | |
1011 | lsp->ile.in_label, lsp->flags); | |
1012 | ||
1013 | lsp = hash_release(lsp_table, &lsp->ile); | |
1014 | if (lsp) | |
1015 | XFREE(MTYPE_LSP, lsp); | |
1016 | } | |
1017 | } | |
1018 | ||
1019 | /* | |
1020 | * Callback upon finishing the processing of all scheduled | |
1021 | * LSP forwarding entries. | |
1022 | */ | |
1023 | static void | |
1024 | lsp_processq_complete (struct work_queue *wq) | |
1025 | { | |
1026 | /* Nothing to do for now. */ | |
1027 | } | |
1028 | ||
1029 | /* | |
1030 | * Add LSP forwarding entry to queue for subsequent processing. | |
1031 | */ | |
1032 | static int | |
1033 | lsp_processq_add (zebra_lsp_t *lsp) | |
1034 | { | |
1035 | /* If already scheduled, exit. */ | |
1036 | if (CHECK_FLAG (lsp->flags, LSP_FLAG_SCHEDULED)) | |
1037 | return 0; | |
1038 | ||
33c32282 DW |
1039 | if (zebrad.lsp_process_q == NULL) |
1040 | { | |
1041 | zlog_err ("%s: work_queue does not exist!", __func__); | |
1042 | return -1; | |
1043 | } | |
1044 | ||
40c7bdb0 | 1045 | work_queue_add (zebrad.lsp_process_q, lsp); |
1046 | SET_FLAG (lsp->flags, LSP_FLAG_SCHEDULED); | |
1047 | return 0; | |
1048 | } | |
1049 | ||
1050 | /* | |
1051 | * Callback to allocate LSP forwarding table entry. | |
1052 | */ | |
1053 | static void * | |
1054 | lsp_alloc (void *p) | |
1055 | { | |
1056 | const zebra_ile_t *ile = p; | |
1057 | zebra_lsp_t *lsp; | |
1058 | ||
1059 | lsp = XCALLOC (MTYPE_LSP, sizeof(zebra_lsp_t)); | |
1060 | lsp->ile = *ile; | |
1061 | ||
1062 | if (IS_ZEBRA_DEBUG_MPLS) | |
1063 | zlog_debug ("Alloc LSP in-label %u", lsp->ile.in_label); | |
1064 | ||
1065 | return ((void *)lsp); | |
1066 | } | |
1067 | ||
1068 | /* | |
1069 | * Create printable string for NHLFE entry. | |
1070 | */ | |
1071 | static char * | |
1072 | nhlfe2str (zebra_nhlfe_t *nhlfe, char *buf, int size) | |
1073 | { | |
1074 | struct nexthop *nexthop; | |
1075 | ||
1076 | buf[0] = '\0'; | |
1077 | nexthop = nhlfe->nexthop; | |
1078 | switch (nexthop->type) | |
1079 | { | |
1080 | case NEXTHOP_TYPE_IPV4: | |
88d88a9c | 1081 | case NEXTHOP_TYPE_IPV4_IFINDEX: |
40c7bdb0 | 1082 | inet_ntop (AF_INET, &nexthop->gate.ipv4, buf, size); |
1083 | break; | |
1084 | case NEXTHOP_TYPE_IPV6: | |
1085 | inet_ntop (AF_INET6, &nexthop->gate.ipv6, buf, size); | |
1086 | break; | |
1087 | default: | |
1088 | break; | |
1089 | } | |
1090 | ||
1091 | return buf; | |
1092 | } | |
1093 | ||
1094 | /* | |
1095 | * Check if NHLFE matches with search info passed. | |
1096 | */ | |
1097 | static int | |
1098 | nhlfe_nhop_match (zebra_nhlfe_t *nhlfe, enum nexthop_types_t gtype, | |
a64448ba | 1099 | union g_addr *gate, ifindex_t ifindex) |
40c7bdb0 | 1100 | { |
1101 | struct nexthop *nhop; | |
ea6bebb8 | 1102 | int cmp = 1; |
40c7bdb0 | 1103 | |
1104 | nhop = nhlfe->nexthop; | |
1105 | if (!nhop) | |
ea6bebb8 | 1106 | return 1; |
40c7bdb0 | 1107 | |
1108 | if (nhop->type != gtype) | |
ea6bebb8 | 1109 | return 1; |
40c7bdb0 | 1110 | |
1111 | switch (nhop->type) | |
1112 | { | |
1113 | case NEXTHOP_TYPE_IPV4: | |
88d88a9c | 1114 | case NEXTHOP_TYPE_IPV4_IFINDEX: |
40c7bdb0 | 1115 | cmp = memcmp(&(nhop->gate.ipv4), &(gate->ipv4), |
ea6bebb8 | 1116 | sizeof(struct in_addr)); |
88d88a9c RW |
1117 | if (!cmp && nhop->type == NEXTHOP_TYPE_IPV4_IFINDEX) |
1118 | cmp = !(nhop->ifindex == ifindex); | |
40c7bdb0 | 1119 | break; |
1120 | case NEXTHOP_TYPE_IPV6: | |
1121 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1122 | cmp = memcmp(&(nhop->gate.ipv6), &(gate->ipv6), | |
1123 | sizeof(struct in6_addr)); | |
1124 | if (!cmp && nhop->type == NEXTHOP_TYPE_IPV6_IFINDEX) | |
1125 | cmp = !(nhop->ifindex == ifindex); | |
1126 | break; | |
1127 | default: | |
1128 | break; | |
1129 | } | |
1130 | ||
1131 | return cmp; | |
1132 | } | |
1133 | ||
1134 | ||
1135 | /* | |
1136 | * Locate NHLFE that matches with passed info. | |
1137 | */ | |
1138 | static zebra_nhlfe_t * | |
1139 | nhlfe_find (zebra_lsp_t *lsp, enum lsp_types_t lsp_type, | |
1140 | enum nexthop_types_t gtype, union g_addr *gate, | |
a64448ba | 1141 | ifindex_t ifindex) |
40c7bdb0 | 1142 | { |
1143 | zebra_nhlfe_t *nhlfe; | |
1144 | ||
1145 | if (!lsp) | |
1146 | return NULL; | |
1147 | ||
1148 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) | |
1149 | { | |
1150 | if (nhlfe->type != lsp_type) | |
1151 | continue; | |
a64448ba | 1152 | if (!nhlfe_nhop_match (nhlfe, gtype, gate, ifindex)) |
40c7bdb0 | 1153 | break; |
1154 | } | |
1155 | ||
1156 | return nhlfe; | |
1157 | } | |
1158 | ||
1159 | /* | |
1160 | * Add NHLFE. Base entry must have been created and duplicate | |
1161 | * check done. | |
1162 | */ | |
1163 | static zebra_nhlfe_t * | |
1164 | nhlfe_add (zebra_lsp_t *lsp, enum lsp_types_t lsp_type, | |
1165 | enum nexthop_types_t gtype, union g_addr *gate, | |
a64448ba | 1166 | ifindex_t ifindex, mpls_label_t out_label) |
40c7bdb0 | 1167 | { |
1168 | zebra_nhlfe_t *nhlfe; | |
1169 | struct nexthop *nexthop; | |
1170 | ||
1171 | if (!lsp) | |
1172 | return NULL; | |
1173 | ||
1174 | nhlfe = XCALLOC(MTYPE_NHLFE, sizeof(zebra_nhlfe_t)); | |
1175 | if (!nhlfe) | |
1176 | return NULL; | |
1177 | ||
1178 | nhlfe->lsp = lsp; | |
1179 | nhlfe->type = lsp_type; | |
1180 | nhlfe->distance = lsp_distance (lsp_type); | |
1181 | ||
1182 | nexthop = nexthop_new(); | |
1183 | if (!nexthop) | |
1184 | { | |
1185 | XFREE (MTYPE_NHLFE, nhlfe); | |
1186 | return NULL; | |
1187 | } | |
ce549947 | 1188 | nexthop_add_labels (nexthop, lsp_type, 1, &out_label); |
40c7bdb0 | 1189 | |
1190 | nexthop->type = gtype; | |
1191 | switch (nexthop->type) | |
1192 | { | |
1193 | case NEXTHOP_TYPE_IPV4: | |
88d88a9c | 1194 | case NEXTHOP_TYPE_IPV4_IFINDEX: |
40c7bdb0 | 1195 | nexthop->gate.ipv4 = gate->ipv4; |
88d88a9c RW |
1196 | if (ifindex) |
1197 | nexthop->ifindex = ifindex; | |
40c7bdb0 | 1198 | break; |
1199 | case NEXTHOP_TYPE_IPV6: | |
1200 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1201 | nexthop->gate.ipv6 = gate->ipv6; | |
1202 | if (ifindex) | |
1203 | nexthop->ifindex = ifindex; | |
1204 | break; | |
1205 | default: | |
1206 | nexthop_free(nexthop); | |
1207 | XFREE (MTYPE_NHLFE, nhlfe); | |
1208 | return NULL; | |
1209 | break; | |
1210 | } | |
1211 | ||
1212 | nhlfe->nexthop = nexthop; | |
1213 | if (lsp->nhlfe_list) | |
1214 | lsp->nhlfe_list->prev = nhlfe; | |
1215 | nhlfe->next = lsp->nhlfe_list; | |
1216 | lsp->nhlfe_list = nhlfe; | |
1217 | ||
1218 | return nhlfe; | |
1219 | } | |
1220 | ||
1221 | /* | |
1222 | * Delete NHLFE. Entry must be present on list. | |
1223 | */ | |
1224 | static int | |
1225 | nhlfe_del (zebra_nhlfe_t *nhlfe) | |
1226 | { | |
1227 | zebra_lsp_t *lsp; | |
1228 | ||
1229 | if (!nhlfe) | |
1230 | return -1; | |
1231 | ||
1232 | lsp = nhlfe->lsp; | |
1233 | if (!lsp) | |
1234 | return -1; | |
1235 | ||
1236 | /* Free nexthop. */ | |
1237 | if (nhlfe->nexthop) | |
1238 | nexthop_free(nhlfe->nexthop); | |
1239 | ||
1240 | /* Unlink from LSP */ | |
1241 | if (nhlfe->next) | |
1242 | nhlfe->next->prev = nhlfe->prev; | |
1243 | if (nhlfe->prev) | |
1244 | nhlfe->prev->next = nhlfe->next; | |
1245 | else | |
1246 | lsp->nhlfe_list = nhlfe->next; | |
1247 | ||
bb49a121 FR |
1248 | if (nhlfe == lsp->best_nhlfe) |
1249 | lsp->best_nhlfe = NULL; | |
1250 | ||
40c7bdb0 | 1251 | XFREE (MTYPE_NHLFE, nhlfe); |
1252 | ||
1253 | return 0; | |
1254 | } | |
1255 | ||
a64448ba DS |
1256 | /* |
1257 | * Update label for NHLFE entry. | |
1258 | */ | |
1259 | static void | |
1260 | nhlfe_out_label_update (zebra_nhlfe_t *nhlfe, struct nexthop_label *nh_label) | |
1261 | { | |
1262 | nhlfe->nexthop->nh_label->label[0] = nh_label->label[0]; | |
1263 | } | |
1264 | ||
40c7bdb0 | 1265 | static int |
ce549947 RW |
1266 | mpls_lsp_uninstall_all (struct hash *lsp_table, zebra_lsp_t *lsp, |
1267 | enum lsp_types_t type) | |
40c7bdb0 | 1268 | { |
40c7bdb0 | 1269 | zebra_nhlfe_t *nhlfe, *nhlfe_next; |
1270 | int schedule_lsp = 0; | |
1271 | char buf[BUFSIZ]; | |
1272 | ||
40c7bdb0 | 1273 | /* Mark NHLFEs for delete or directly delete, as appropriate. */ |
1274 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe_next) | |
1275 | { | |
1276 | nhlfe_next = nhlfe->next; | |
1277 | ||
1278 | /* Skip non-static NHLFEs */ | |
ce549947 | 1279 | if (nhlfe->type != type) |
40c7bdb0 | 1280 | continue; |
1281 | ||
1282 | if (IS_ZEBRA_DEBUG_MPLS) | |
1283 | { | |
1284 | nhlfe2str (nhlfe, buf, BUFSIZ); | |
1285 | zlog_debug ("Del LSP in-label %u type %d nexthop %s flags 0x%x", | |
ce549947 | 1286 | lsp->ile.in_label, type, buf, nhlfe->flags); |
40c7bdb0 | 1287 | } |
1288 | ||
1289 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED)) | |
1290 | { | |
1291 | UNSET_FLAG (nhlfe->flags, NHLFE_FLAG_CHANGED); | |
1292 | SET_FLAG (nhlfe->flags, NHLFE_FLAG_DELETED); | |
1293 | schedule_lsp = 1; | |
1294 | } | |
1295 | else | |
1296 | { | |
1297 | nhlfe_del (nhlfe); | |
1298 | } | |
1299 | } | |
1300 | ||
1301 | /* Queue LSP for processing, if needed, else delete. */ | |
1302 | if (schedule_lsp) | |
1303 | { | |
1304 | if (lsp_processq_add (lsp)) | |
1305 | return -1; | |
1306 | } | |
1307 | else if (!lsp->nhlfe_list && | |
1308 | !CHECK_FLAG (lsp->flags, LSP_FLAG_SCHEDULED)) | |
1309 | { | |
1310 | if (IS_ZEBRA_DEBUG_MPLS) | |
1311 | zlog_debug ("Free LSP in-label %u flags 0x%x", | |
1312 | lsp->ile.in_label, lsp->flags); | |
1313 | ||
1314 | lsp = hash_release(lsp_table, &lsp->ile); | |
1315 | if (lsp) | |
1316 | XFREE(MTYPE_LSP, lsp); | |
1317 | } | |
1318 | ||
1319 | return 0; | |
1320 | } | |
1321 | ||
ce549947 RW |
1322 | /* |
1323 | * Uninstall all static NHLFEs for a particular LSP forwarding entry. | |
1324 | * If no other NHLFEs exist, the entry would be deleted. | |
1325 | */ | |
1326 | static int | |
1327 | mpls_static_lsp_uninstall_all (struct zebra_vrf *zvrf, mpls_label_t in_label) | |
1328 | { | |
1329 | struct hash *lsp_table; | |
1330 | zebra_ile_t tmp_ile; | |
1331 | zebra_lsp_t *lsp; | |
1332 | ||
1333 | /* Lookup table. */ | |
1334 | lsp_table = zvrf->lsp_table; | |
1335 | if (!lsp_table) | |
1336 | return -1; | |
1337 | ||
1338 | /* If entry is not present, exit. */ | |
1339 | tmp_ile.in_label = in_label; | |
1340 | lsp = hash_lookup (lsp_table, &tmp_ile); | |
1341 | if (!lsp || !lsp->nhlfe_list) | |
1342 | return 0; | |
1343 | ||
1344 | return mpls_lsp_uninstall_all (lsp_table, lsp, ZEBRA_LSP_STATIC); | |
1345 | } | |
1346 | ||
b78b820d | 1347 | static json_object * |
1348 | nhlfe_json (zebra_nhlfe_t *nhlfe) | |
1349 | { | |
1350 | char buf[BUFSIZ]; | |
1351 | json_object *json_nhlfe = NULL; | |
1352 | struct nexthop *nexthop = nhlfe->nexthop; | |
1353 | ||
1354 | json_nhlfe = json_object_new_object(); | |
1355 | json_object_string_add(json_nhlfe, "type", nhlfe_type2str(nhlfe->type)); | |
1356 | json_object_int_add(json_nhlfe, "outLabel", nexthop->nh_label->label[0]); | |
1357 | json_object_int_add(json_nhlfe, "distance", nhlfe->distance); | |
1358 | ||
1359 | if (CHECK_FLAG (nhlfe->flags, NHLFE_FLAG_INSTALLED)) | |
1360 | json_object_boolean_true_add(json_nhlfe, "installed"); | |
1361 | ||
1362 | switch (nexthop->type) | |
1363 | { | |
1364 | case NEXTHOP_TYPE_IPV4: | |
88d88a9c | 1365 | case NEXTHOP_TYPE_IPV4_IFINDEX: |
b78b820d | 1366 | json_object_string_add(json_nhlfe, "nexthop", |
1367 | inet_ntoa (nexthop->gate.ipv4)); | |
1368 | break; | |
1369 | case NEXTHOP_TYPE_IPV6: | |
1370 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1371 | json_object_string_add(json_nhlfe, "nexthop", | |
1372 | inet_ntop (AF_INET6, &nexthop->gate.ipv6, buf, BUFSIZ)); | |
1373 | ||
1374 | if (nexthop->ifindex) | |
baaea325 | 1375 | json_object_string_add(json_nhlfe, "interface", ifindex2ifname (nexthop->ifindex, VRF_DEFAULT)); |
b78b820d | 1376 | break; |
1377 | default: | |
1378 | break; | |
1379 | } | |
1380 | return json_nhlfe; | |
1381 | } | |
1382 | ||
3ab18ff2 | 1383 | /* |
1384 | * Print the NHLFE for a LSP forwarding entry. | |
1385 | */ | |
1386 | static void | |
1387 | nhlfe_print (zebra_nhlfe_t *nhlfe, struct vty *vty) | |
1388 | { | |
1389 | struct nexthop *nexthop; | |
1390 | char buf[BUFSIZ]; | |
1391 | ||
1392 | nexthop = nhlfe->nexthop; | |
1393 | if (!nexthop || !nexthop->nh_label) // unexpected | |
1394 | return; | |
1395 | ||
1396 | vty_out(vty, " type: %s remote label: %s distance: %d%s", | |
1397 | nhlfe_type2str(nhlfe->type), | |
1398 | label2str(nexthop->nh_label->label[0], buf, BUFSIZ), | |
1399 | nhlfe->distance, VTY_NEWLINE); | |
1400 | switch (nexthop->type) | |
1401 | { | |
1402 | case NEXTHOP_TYPE_IPV4: | |
88d88a9c | 1403 | case NEXTHOP_TYPE_IPV4_IFINDEX: |
3ab18ff2 | 1404 | vty_out (vty, " via %s", inet_ntoa (nexthop->gate.ipv4)); |
88d88a9c | 1405 | if (nexthop->ifindex) |
baaea325 | 1406 | vty_out (vty, " dev %s", ifindex2ifname (nexthop->ifindex, VRF_DEFAULT)); |
3ab18ff2 | 1407 | break; |
1408 | case NEXTHOP_TYPE_IPV6: | |
1409 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1410 | vty_out (vty, " via %s", | |
b78b820d | 1411 | inet_ntop (AF_INET6, &nexthop->gate.ipv6, buf, BUFSIZ)); |
3ab18ff2 | 1412 | if (nexthop->ifindex) |
baaea325 | 1413 | vty_out (vty, " dev %s", ifindex2ifname (nexthop->ifindex, VRF_DEFAULT)); |
3ab18ff2 | 1414 | break; |
1415 | default: | |
1416 | break; | |
1417 | } | |
1418 | vty_out(vty, "%s", CHECK_FLAG (nhlfe->flags, NHLFE_FLAG_INSTALLED) ? | |
1419 | " (installed)" : ""); | |
1420 | vty_out(vty, "%s", VTY_NEWLINE); | |
1421 | } | |
1422 | ||
1423 | /* | |
1424 | * Print an LSP forwarding entry. | |
1425 | */ | |
1426 | static void | |
1427 | lsp_print (zebra_lsp_t *lsp, void *ctxt) | |
1428 | { | |
1429 | zebra_nhlfe_t *nhlfe; | |
1430 | struct vty *vty; | |
1431 | ||
1432 | vty = (struct vty *) ctxt; | |
1433 | ||
1434 | vty_out(vty, "Local label: %u%s%s", | |
1435 | lsp->ile.in_label, | |
1436 | CHECK_FLAG (lsp->flags, LSP_FLAG_INSTALLED) ? " (installed)" : "", | |
1437 | VTY_NEWLINE); | |
1438 | ||
1439 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) | |
1440 | nhlfe_print (nhlfe, vty); | |
1441 | } | |
1442 | ||
1443 | /* | |
b78b820d | 1444 | * JSON objects for an LSP forwarding entry. |
3ab18ff2 | 1445 | */ |
b78b820d | 1446 | static json_object * |
1447 | lsp_json (zebra_lsp_t *lsp) | |
3ab18ff2 | 1448 | { |
b78b820d | 1449 | zebra_nhlfe_t *nhlfe = NULL; |
1450 | json_object *json = json_object_new_object(); | |
1451 | json_object *json_nhlfe_list = json_object_new_array(); | |
3ab18ff2 | 1452 | |
b78b820d | 1453 | json_object_int_add(json, "inLabel", lsp->ile.in_label); |
1454 | ||
1455 | if (CHECK_FLAG (lsp->flags, LSP_FLAG_INSTALLED)) | |
1456 | json_object_boolean_true_add(json, "installed"); | |
3ab18ff2 | 1457 | |
b78b820d | 1458 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) |
1459 | json_object_array_add(json_nhlfe_list, nhlfe_json(nhlfe)); | |
1460 | ||
1461 | json_object_object_add(json, "nexthops", json_nhlfe_list); | |
1462 | return json; | |
1463 | } | |
1464 | ||
1465 | ||
1466 | /* Return a sorted linked list of the hash contents */ | |
1467 | static struct list * | |
1468 | hash_get_sorted_list (struct hash *hash, void *cmp) | |
1469 | { | |
1470 | unsigned int i; | |
1471 | struct hash_backet *hb; | |
1472 | struct list *sorted_list = list_new(); | |
1473 | ||
1474 | sorted_list->cmp = (int (*)(void *, void *)) cmp; | |
1475 | ||
1476 | for (i = 0; i < hash->size; i++) | |
1477 | for (hb = hash->index[i]; hb; hb = hb->next) | |
1478 | listnode_add_sort(sorted_list, hb->data); | |
1479 | ||
1480 | return sorted_list; | |
3ab18ff2 | 1481 | } |
1482 | ||
7758e3f3 | 1483 | /* |
b78b820d | 1484 | * Compare two LSPs based on their label values. |
7758e3f3 | 1485 | */ |
b78b820d | 1486 | static int |
1487 | lsp_cmp (zebra_lsp_t *lsp1, zebra_lsp_t *lsp2) | |
7758e3f3 | 1488 | { |
b78b820d | 1489 | if (lsp1->ile.in_label < lsp2->ile.in_label) |
1490 | return -1; | |
7758e3f3 | 1491 | |
b78b820d | 1492 | if (lsp1->ile.in_label > lsp2->ile.in_label) |
1493 | return 1; | |
7758e3f3 | 1494 | |
b78b820d | 1495 | return 0; |
7758e3f3 | 1496 | } |
1497 | ||
1498 | /* | |
1499 | * Callback to allocate static LSP. | |
1500 | */ | |
1501 | static void * | |
1502 | slsp_alloc (void *p) | |
1503 | { | |
1504 | const zebra_ile_t *ile = p; | |
1505 | zebra_slsp_t *slsp; | |
1506 | ||
1507 | slsp = XCALLOC (MTYPE_SLSP, sizeof(zebra_slsp_t)); | |
1508 | slsp->ile = *ile; | |
1509 | return ((void *)slsp); | |
1510 | } | |
1511 | ||
b78b820d | 1512 | /* |
1513 | * Compare two static LSPs based on their label values. | |
1514 | */ | |
1515 | static int | |
1516 | slsp_cmp (zebra_slsp_t *slsp1, zebra_slsp_t *slsp2) | |
1517 | { | |
1518 | if (slsp1->ile.in_label < slsp2->ile.in_label) | |
1519 | return -1; | |
1520 | ||
1521 | if (slsp1->ile.in_label > slsp2->ile.in_label) | |
1522 | return 1; | |
1523 | ||
1524 | return 0; | |
1525 | } | |
1526 | ||
7758e3f3 | 1527 | /* |
1528 | * Check if static NHLFE matches with search info passed. | |
1529 | */ | |
1530 | static int | |
1531 | snhlfe_match (zebra_snhlfe_t *snhlfe, enum nexthop_types_t gtype, | |
a64448ba | 1532 | union g_addr *gate, ifindex_t ifindex) |
7758e3f3 | 1533 | { |
ea6bebb8 | 1534 | int cmp = 1; |
7758e3f3 | 1535 | |
1536 | if (snhlfe->gtype != gtype) | |
ea6bebb8 | 1537 | return 1; |
7758e3f3 | 1538 | |
1539 | switch (snhlfe->gtype) | |
1540 | { | |
1541 | case NEXTHOP_TYPE_IPV4: | |
1542 | cmp = memcmp(&(snhlfe->gate.ipv4), &(gate->ipv4), | |
1543 | sizeof(struct in_addr)); | |
1544 | break; | |
1545 | case NEXTHOP_TYPE_IPV6: | |
1546 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1547 | cmp = memcmp(&(snhlfe->gate.ipv6), &(gate->ipv6), | |
1548 | sizeof(struct in6_addr)); | |
1549 | if (!cmp && snhlfe->gtype == NEXTHOP_TYPE_IPV6_IFINDEX) | |
1550 | cmp = !(snhlfe->ifindex == ifindex); | |
1551 | break; | |
1552 | default: | |
1553 | break; | |
1554 | } | |
1555 | ||
1556 | return cmp; | |
1557 | } | |
1558 | ||
1559 | /* | |
1560 | * Locate static NHLFE that matches with passed info. | |
1561 | */ | |
1562 | static zebra_snhlfe_t * | |
1563 | snhlfe_find (zebra_slsp_t *slsp, enum nexthop_types_t gtype, | |
a64448ba | 1564 | union g_addr *gate, ifindex_t ifindex) |
7758e3f3 | 1565 | { |
1566 | zebra_snhlfe_t *snhlfe; | |
1567 | ||
1568 | if (!slsp) | |
1569 | return NULL; | |
1570 | ||
1571 | for (snhlfe = slsp->snhlfe_list; snhlfe; snhlfe = snhlfe->next) | |
1572 | { | |
a64448ba | 1573 | if (!snhlfe_match (snhlfe, gtype, gate, ifindex)) |
7758e3f3 | 1574 | break; |
1575 | } | |
1576 | ||
1577 | return snhlfe; | |
1578 | } | |
1579 | ||
1580 | ||
1581 | /* | |
1582 | * Add static NHLFE. Base LSP config entry must have been created | |
1583 | * and duplicate check done. | |
1584 | */ | |
1585 | static zebra_snhlfe_t * | |
1586 | snhlfe_add (zebra_slsp_t *slsp, enum nexthop_types_t gtype, | |
a64448ba | 1587 | union g_addr *gate, ifindex_t ifindex, |
7758e3f3 | 1588 | mpls_label_t out_label) |
1589 | { | |
1590 | zebra_snhlfe_t *snhlfe; | |
1591 | ||
1592 | if (!slsp) | |
1593 | return NULL; | |
1594 | ||
1595 | snhlfe = XCALLOC(MTYPE_SNHLFE, sizeof(zebra_snhlfe_t)); | |
1596 | snhlfe->slsp = slsp; | |
1597 | snhlfe->out_label = out_label; | |
1598 | snhlfe->gtype = gtype; | |
1599 | switch (gtype) | |
1600 | { | |
1601 | case NEXTHOP_TYPE_IPV4: | |
1602 | snhlfe->gate.ipv4 = gate->ipv4; | |
1603 | break; | |
1604 | case NEXTHOP_TYPE_IPV6: | |
1605 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1606 | snhlfe->gate.ipv6 = gate->ipv6; | |
1607 | if (ifindex) | |
1608 | snhlfe->ifindex = ifindex; | |
1609 | break; | |
1610 | default: | |
1611 | XFREE (MTYPE_SNHLFE, snhlfe); | |
1612 | return NULL; | |
1613 | } | |
1614 | ||
1615 | if (slsp->snhlfe_list) | |
1616 | slsp->snhlfe_list->prev = snhlfe; | |
1617 | snhlfe->next = slsp->snhlfe_list; | |
1618 | slsp->snhlfe_list = snhlfe; | |
1619 | ||
1620 | return snhlfe; | |
1621 | } | |
1622 | ||
1623 | /* | |
1624 | * Delete static NHLFE. Entry must be present on list. | |
1625 | */ | |
1626 | static int | |
1627 | snhlfe_del (zebra_snhlfe_t *snhlfe) | |
1628 | { | |
1629 | zebra_slsp_t *slsp; | |
1630 | ||
1631 | if (!snhlfe) | |
1632 | return -1; | |
1633 | ||
1634 | slsp = snhlfe->slsp; | |
1635 | if (!slsp) | |
1636 | return -1; | |
1637 | ||
1638 | if (snhlfe->next) | |
1639 | snhlfe->next->prev = snhlfe->prev; | |
1640 | if (snhlfe->prev) | |
1641 | snhlfe->prev->next = snhlfe->next; | |
1642 | else | |
1643 | slsp->snhlfe_list = snhlfe->next; | |
1644 | ||
1645 | snhlfe->prev = snhlfe->next = NULL; | |
1646 | if (snhlfe->ifname) | |
1647 | XFREE (MTYPE_SNHLFE_IFNAME, snhlfe->ifname); | |
1648 | XFREE (MTYPE_SNHLFE, snhlfe); | |
1649 | ||
1650 | return 0; | |
1651 | } | |
1652 | ||
1653 | /* | |
1654 | * Delete all static NHLFE entries for this LSP (in label). | |
1655 | */ | |
1656 | static int | |
1657 | snhlfe_del_all (zebra_slsp_t *slsp) | |
1658 | { | |
1659 | zebra_snhlfe_t *snhlfe, *snhlfe_next; | |
1660 | ||
1661 | if (!slsp) | |
1662 | return -1; | |
1663 | ||
1664 | for (snhlfe = slsp->snhlfe_list; snhlfe; snhlfe = snhlfe_next) | |
1665 | { | |
1666 | snhlfe_next = snhlfe->next; | |
1667 | snhlfe_del (snhlfe); | |
1668 | } | |
1669 | ||
1670 | return 0; | |
1671 | } | |
1672 | ||
1673 | /* | |
1674 | * Create printable string for NHLFE configuration. | |
1675 | */ | |
1676 | static char * | |
1677 | snhlfe2str (zebra_snhlfe_t *snhlfe, char *buf, int size) | |
1678 | { | |
1679 | buf[0] = '\0'; | |
1680 | switch (snhlfe->gtype) | |
1681 | { | |
1682 | case NEXTHOP_TYPE_IPV4: | |
1683 | inet_ntop (AF_INET, &snhlfe->gate.ipv4, buf, size); | |
1684 | break; | |
1685 | case NEXTHOP_TYPE_IPV6: | |
1686 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1687 | inet_ntop (AF_INET6, &snhlfe->gate.ipv6, buf, size); | |
1688 | if (snhlfe->ifindex) | |
baaea325 | 1689 | strcat (buf, ifindex2ifname (snhlfe->ifindex, VRF_DEFAULT)); |
7758e3f3 | 1690 | break; |
1691 | default: | |
1692 | break; | |
1693 | } | |
1694 | ||
1695 | return buf; | |
1696 | } | |
1697 | ||
40c7bdb0 | 1698 | /* |
1699 | * Initialize work queue for processing changed LSPs. | |
1700 | */ | |
33c32282 | 1701 | static int |
40c7bdb0 | 1702 | mpls_processq_init (struct zebra_t *zebra) |
1703 | { | |
1704 | zebra->lsp_process_q = work_queue_new (zebra->master, "LSP processing"); | |
1705 | if (!zebra->lsp_process_q) | |
1706 | { | |
1707 | zlog_err ("%s: could not initialise work queue!", __func__); | |
33c32282 | 1708 | return -1; |
40c7bdb0 | 1709 | } |
1710 | ||
1711 | zebra->lsp_process_q->spec.workfunc = &lsp_process; | |
1712 | zebra->lsp_process_q->spec.del_item_data = &lsp_processq_del; | |
1713 | zebra->lsp_process_q->spec.errorfunc = NULL; | |
1714 | zebra->lsp_process_q->spec.completion_func = &lsp_processq_complete; | |
1715 | zebra->lsp_process_q->spec.max_retries = 0; | |
1716 | zebra->lsp_process_q->spec.hold = 10; | |
33c32282 DW |
1717 | |
1718 | return 0; | |
40c7bdb0 | 1719 | } |
1720 | ||
7758e3f3 | 1721 | |
1722 | ||
1723 | /* Public functions */ | |
1724 | ||
a22f3f5d | 1725 | /* |
1726 | * String to label conversion, labels separated by '/'. | |
1727 | */ | |
1728 | int | |
1729 | mpls_str2label (const char *label_str, u_int8_t *num_labels, | |
1730 | mpls_label_t *labels) | |
1731 | { | |
1732 | char *endp; | |
1733 | int i; | |
1734 | ||
1735 | *num_labels = 0; | |
1736 | for (i = 0; i < MPLS_MAX_LABELS; i++) | |
1737 | { | |
a64448ba | 1738 | mpls_label_t label; |
a22f3f5d | 1739 | |
1740 | label = strtoul(label_str, &endp, 0); | |
1741 | ||
1742 | /* validity checks */ | |
1743 | if (endp == label_str) | |
1744 | return -1; | |
1745 | ||
1746 | if (!IS_MPLS_UNRESERVED_LABEL(label)) | |
1747 | return -1; | |
1748 | ||
1749 | labels[i] = label; | |
1750 | if (*endp == '\0') | |
1751 | { | |
1752 | *num_labels = i + 1; | |
1753 | return 0; | |
1754 | } | |
1755 | ||
1756 | /* Check separator. */ | |
1757 | if (*endp != '/') | |
1758 | return -1; | |
1759 | ||
1760 | label_str = endp + 1; | |
1761 | } | |
1762 | ||
1763 | /* Too many labels. */ | |
1764 | return -1; | |
1765 | } | |
1766 | ||
1767 | /* | |
1768 | * Label to string conversion, labels in string separated by '/'. | |
1769 | */ | |
1770 | char * | |
1771 | mpls_label2str (u_int8_t num_labels, mpls_label_t *labels, | |
4caac24b | 1772 | char *buf, int len, int pretty) |
a22f3f5d | 1773 | { |
4caac24b | 1774 | char *buf_ptr = buf; |
a22f3f5d | 1775 | buf[0] = '\0'; |
4caac24b DW |
1776 | |
1777 | if (pretty) { | |
1778 | if (num_labels == 1) { | |
1779 | label2str(labels[0], buf, len); | |
1780 | } else if (num_labels == 2) { | |
1781 | label2str(labels[0], buf, len); | |
1782 | buf_ptr += strlen(buf); | |
1783 | ||
1784 | snprintf (buf_ptr, len, "/"); | |
1785 | buf_ptr++; | |
1786 | ||
1787 | label2str(labels[1], buf_ptr, len); | |
1788 | } | |
1789 | } else { | |
1790 | if (num_labels == 1) | |
1791 | snprintf (buf, len, "%u", labels[0]); | |
1792 | else if (num_labels == 2) | |
1793 | snprintf (buf, len, "%u/%u", labels[0], labels[1]); | |
1794 | } | |
a22f3f5d | 1795 | return buf; |
1796 | } | |
1797 | ||
a64448ba DS |
1798 | /* |
1799 | * Install dynamic LSP entry. | |
1800 | */ | |
1801 | int | |
1802 | zebra_mpls_lsp_install (struct zebra_vrf *zvrf, struct route_node *rn, struct rib *rib) | |
1803 | { | |
1804 | struct route_table *table; | |
1805 | zebra_fec_t *fec; | |
1806 | ||
1807 | table = zvrf->fec_table[family2afi(PREFIX_FAMILY(&rn->p))]; | |
1808 | if (!table) | |
1809 | return -1; | |
1810 | ||
1811 | /* See if there is a configured label binding for this FEC. */ | |
1812 | fec = fec_find (table, &rn->p); | |
1813 | if (!fec || fec->label == MPLS_INVALID_LABEL) | |
1814 | return 0; | |
1815 | ||
1816 | /* We cannot install a label forwarding entry if local label is the | |
1817 | * implicit-null label. | |
1818 | */ | |
1819 | if (fec->label == MPLS_IMP_NULL_LABEL) | |
1820 | return 0; | |
1821 | ||
1822 | if (lsp_install (zvrf, fec->label, rn, rib)) | |
1823 | return -1; | |
1824 | ||
1825 | return 0; | |
1826 | } | |
1827 | ||
1828 | /* | |
1829 | * Uninstall dynamic LSP entry, if any. | |
1830 | */ | |
1831 | int | |
1832 | zebra_mpls_lsp_uninstall (struct zebra_vrf *zvrf, struct route_node *rn, struct rib *rib) | |
1833 | { | |
1834 | struct route_table *table; | |
1835 | zebra_fec_t *fec; | |
1836 | ||
1837 | table = zvrf->fec_table[family2afi(PREFIX_FAMILY(&rn->p))]; | |
1838 | if (!table) | |
1839 | return -1; | |
1840 | ||
1841 | /* See if there is a configured label binding for this FEC. */ | |
1842 | fec = fec_find (table, &rn->p); | |
1843 | if (!fec || fec->label == MPLS_INVALID_LABEL) | |
1844 | return 0; | |
1845 | ||
1846 | /* Uninstall always removes all dynamic NHLFEs. */ | |
1847 | return lsp_uninstall (zvrf, fec->label); | |
1848 | } | |
1849 | ||
5aba114a DS |
1850 | /* |
1851 | * Registration from a client for the label binding for a FEC. If a binding | |
1852 | * already exists, it is informed to the client. | |
28d58fd7 VV |
1853 | * NOTE: If there is a manually configured label binding, that is used. |
1854 | * Otherwise, if aa label index is specified, it means we have to allocate the | |
1855 | * label from a locally configured label block (SRGB), if one exists and index | |
1856 | * is acceptable. | |
5aba114a DS |
1857 | */ |
1858 | int | |
1859 | zebra_mpls_fec_register (struct zebra_vrf *zvrf, struct prefix *p, | |
28d58fd7 | 1860 | u_int32_t label_index, struct zserv *client) |
5aba114a DS |
1861 | { |
1862 | struct route_table *table; | |
1863 | zebra_fec_t *fec; | |
1864 | char buf[BUFSIZ]; | |
28d58fd7 VV |
1865 | int new_client; |
1866 | int label_change = 0; | |
1867 | u_int32_t old_label; | |
5aba114a DS |
1868 | |
1869 | table = zvrf->fec_table[family2afi(PREFIX_FAMILY(p))]; | |
1870 | if (!table) | |
1871 | return -1; | |
1872 | ||
1873 | if (IS_ZEBRA_DEBUG_MPLS) | |
1874 | prefix2str(p, buf, BUFSIZ); | |
1875 | ||
1876 | /* Locate FEC */ | |
1877 | fec = fec_find (table, p); | |
1878 | if (!fec) | |
1879 | { | |
28d58fd7 | 1880 | fec = fec_add (table, p, MPLS_INVALID_LABEL, 0, label_index); |
5aba114a DS |
1881 | if (!fec) |
1882 | { | |
1883 | prefix2str(p, buf, BUFSIZ); | |
1884 | zlog_err("Failed to add FEC %s upon register, client %s", | |
1885 | buf, zebra_route_string(client->proto)); | |
1886 | return -1; | |
1887 | } | |
28d58fd7 VV |
1888 | |
1889 | old_label = MPLS_INVALID_LABEL; | |
1890 | new_client = 1; | |
5aba114a DS |
1891 | } |
1892 | else | |
1893 | { | |
28d58fd7 VV |
1894 | /* Client may register same FEC with different label index. */ |
1895 | new_client = (listnode_lookup(fec->client_list, client) == NULL); | |
1896 | if (!new_client && fec->label_index == label_index) | |
5aba114a DS |
1897 | /* Duplicate register */ |
1898 | return 0; | |
28d58fd7 VV |
1899 | |
1900 | /* Save current label, update label index */ | |
1901 | old_label = fec->label; | |
1902 | fec->label_index = label_index; | |
5aba114a DS |
1903 | } |
1904 | ||
28d58fd7 VV |
1905 | if (new_client) |
1906 | listnode_add (fec->client_list, client); | |
5aba114a DS |
1907 | |
1908 | if (IS_ZEBRA_DEBUG_MPLS) | |
28d58fd7 VV |
1909 | zlog_debug("FEC %s Label Index %u %s by client %s", |
1910 | buf, label_index, new_client ? "registered" : "updated", | |
1911 | zebra_route_string(client->proto)); | |
1912 | ||
1913 | /* If not a configured FEC, derive the local label (from label index) | |
1914 | * or reset it. | |
1915 | */ | |
1916 | if (!(fec->flags & FEC_FLAG_CONFIGURED)) | |
1917 | { | |
1918 | fec_derive_label_from_index (zvrf, fec); | |
1919 | ||
1920 | /* If no label change, exit. */ | |
1921 | if (fec->label == old_label) | |
1922 | return 0; | |
5aba114a | 1923 | |
28d58fd7 VV |
1924 | label_change = 1; |
1925 | } | |
1926 | ||
1927 | /* If new client or label change, update client and install or uninstall | |
1928 | * label forwarding entry as needed. | |
1929 | */ | |
1930 | /* Inform client of label, if needed. */ | |
1931 | if ((new_client && fec->label != MPLS_INVALID_LABEL) || | |
1932 | label_change) | |
5aba114a DS |
1933 | { |
1934 | if (IS_ZEBRA_DEBUG_MPLS) | |
1935 | zlog_debug ("Update client label %u", fec->label); | |
1936 | fec_send (fec, client); | |
1937 | } | |
1938 | ||
28d58fd7 VV |
1939 | if (new_client || label_change) |
1940 | return fec_change_update_lsp (zvrf, fec, old_label); | |
1941 | ||
5aba114a DS |
1942 | return 0; |
1943 | } | |
1944 | ||
1945 | /* | |
1946 | * Deregistration from a client for the label binding for a FEC. The FEC | |
1947 | * itself is deleted if no other registered clients exist and there is no | |
1948 | * label bound to the FEC. | |
1949 | */ | |
1950 | int | |
1951 | zebra_mpls_fec_unregister (struct zebra_vrf *zvrf, struct prefix *p, | |
1952 | struct zserv *client) | |
1953 | { | |
1954 | struct route_table *table; | |
1955 | zebra_fec_t *fec; | |
1956 | char buf[BUFSIZ]; | |
1957 | ||
1958 | table = zvrf->fec_table[family2afi(PREFIX_FAMILY(p))]; | |
1959 | if (!table) | |
1960 | return -1; | |
1961 | ||
1962 | if (IS_ZEBRA_DEBUG_MPLS) | |
1963 | prefix2str(p, buf, BUFSIZ); | |
1964 | ||
1965 | fec = fec_find (table, p); | |
1966 | if (!fec) | |
1967 | { | |
1968 | prefix2str(p, buf, BUFSIZ); | |
1969 | zlog_err("Failed to find FEC %s upon unregister, client %s", | |
1970 | buf, zebra_route_string(client->proto)); | |
1971 | return -1; | |
1972 | } | |
1973 | ||
1974 | listnode_delete(fec->client_list, client); | |
1975 | ||
1976 | if (IS_ZEBRA_DEBUG_MPLS) | |
1977 | zlog_debug("FEC %s unregistered by client %s", | |
1978 | buf, zebra_route_string(client->proto)); | |
1979 | ||
28d58fd7 VV |
1980 | /* If not a configured entry, delete the FEC if no other clients. Before |
1981 | * deleting, see if any LSP needs to be uninstalled. | |
1982 | */ | |
1983 | if (!(fec->flags & FEC_FLAG_CONFIGURED) && | |
1984 | list_isempty(fec->client_list)) | |
1985 | { | |
1986 | mpls_label_t old_label = fec->label; | |
1987 | fec->label = MPLS_INVALID_LABEL; /* reset */ | |
1988 | fec_change_update_lsp (zvrf, fec, old_label); | |
1989 | fec_del (fec); | |
1990 | } | |
5aba114a DS |
1991 | |
1992 | return 0; | |
1993 | } | |
1994 | ||
1995 | /* | |
1996 | * Cleanup any FECs registered by this client. | |
1997 | */ | |
1998 | int | |
1999 | zebra_mpls_cleanup_fecs_for_client (struct zebra_vrf *zvrf, struct zserv *client) | |
2000 | { | |
2001 | struct route_node *rn; | |
2002 | zebra_fec_t *fec; | |
2003 | struct listnode *node; | |
2004 | struct zserv *fec_client; | |
2005 | int af; | |
2006 | ||
2007 | for (af = AFI_IP; af < AFI_MAX; af++) | |
2008 | { | |
2009 | if (zvrf->fec_table[af] == NULL) | |
2010 | continue; | |
2011 | ||
2012 | for (rn = route_top(zvrf->fec_table[af]); rn; rn = route_next(rn)) | |
2013 | { | |
2014 | fec = rn->info; | |
2015 | if (!fec || list_isempty(fec->client_list)) | |
2016 | continue; | |
2017 | ||
2018 | for (ALL_LIST_ELEMENTS_RO(fec->client_list, node, fec_client)) | |
2019 | { | |
2020 | if (fec_client == client) | |
2021 | { | |
2022 | listnode_delete(fec->client_list, fec_client); | |
2023 | if (!(fec->flags & FEC_FLAG_CONFIGURED) && | |
2024 | list_isempty(fec->client_list)) | |
2025 | fec_del (fec); | |
2026 | break; | |
2027 | } | |
2028 | } | |
2029 | } | |
2030 | } | |
2031 | ||
2032 | return 0; | |
2033 | } | |
2034 | ||
f31e084c DS |
2035 | /* |
2036 | * Return FEC (if any) to which this label is bound. | |
2037 | * Note: Only works for per-prefix binding and when the label is not | |
2038 | * implicit-null. | |
2039 | * TODO: Currently walks entire table, can optimize later with another | |
2040 | * hash.. | |
2041 | */ | |
2042 | zebra_fec_t * | |
2043 | zebra_mpls_fec_for_label (struct zebra_vrf *zvrf, mpls_label_t label) | |
2044 | { | |
2045 | struct route_node *rn; | |
2046 | zebra_fec_t *fec; | |
2047 | int af; | |
2048 | ||
2049 | for (af = AFI_IP; af < AFI_MAX; af++) | |
2050 | { | |
2051 | if (zvrf->fec_table[af] == NULL) | |
2052 | continue; | |
2053 | ||
2054 | for (rn = route_top(zvrf->fec_table[af]); rn; rn = route_next(rn)) | |
2055 | { | |
2056 | if (!rn->info) | |
2057 | continue; | |
2058 | fec = rn->info; | |
2059 | if (fec->label == label) | |
2060 | return fec; | |
2061 | } | |
2062 | } | |
2063 | ||
2064 | return NULL; | |
2065 | } | |
2066 | ||
2067 | /* | |
2068 | * Inform if specified label is currently bound to a FEC or not. | |
2069 | */ | |
2070 | int | |
2071 | zebra_mpls_label_already_bound (struct zebra_vrf *zvrf, mpls_label_t label) | |
2072 | { | |
2073 | return (zebra_mpls_fec_for_label (zvrf, label) ? 1 : 0); | |
2074 | } | |
2075 | ||
2076 | /* | |
5aba114a | 2077 | * Add static FEC to label binding. If there are clients registered for this |
a64448ba DS |
2078 | * FEC, notify them. If there are labeled routes for this FEC, install the |
2079 | * label forwarding entry. | |
5aba114a | 2080 | */ |
f31e084c DS |
2081 | int |
2082 | zebra_mpls_static_fec_add (struct zebra_vrf *zvrf, struct prefix *p, | |
2083 | mpls_label_t in_label) | |
2084 | { | |
2085 | struct route_table *table; | |
2086 | zebra_fec_t *fec; | |
2087 | char buf[BUFSIZ]; | |
a64448ba | 2088 | mpls_label_t old_label; |
f31e084c DS |
2089 | int ret = 0; |
2090 | ||
2091 | table = zvrf->fec_table[family2afi(PREFIX_FAMILY(p))]; | |
2092 | if (!table) | |
2093 | return -1; | |
2094 | ||
2095 | if (IS_ZEBRA_DEBUG_MPLS) | |
2096 | prefix2str(p, buf, BUFSIZ); | |
2097 | ||
2098 | /* Update existing FEC or create a new one. */ | |
2099 | fec = fec_find (table, p); | |
2100 | if (!fec) | |
2101 | { | |
28d58fd7 VV |
2102 | fec = fec_add (table, p, in_label, FEC_FLAG_CONFIGURED, |
2103 | MPLS_INVALID_LABEL_INDEX); | |
f31e084c DS |
2104 | if (!fec) |
2105 | { | |
2106 | prefix2str(p, buf, BUFSIZ); | |
2107 | zlog_err ("Failed to add FEC %s upon config", buf); | |
2108 | return -1; | |
2109 | } | |
2110 | ||
2111 | if (IS_ZEBRA_DEBUG_MPLS) | |
2112 | zlog_debug ("Add fec %s label %u", buf, in_label); | |
2113 | } | |
2114 | else | |
2115 | { | |
2116 | fec->flags |= FEC_FLAG_CONFIGURED; | |
2117 | if (fec->label == in_label) | |
2118 | /* Duplicate config */ | |
2119 | return 0; | |
2120 | ||
5aba114a | 2121 | /* Label change, update clients. */ |
a64448ba | 2122 | old_label = fec->label; |
f31e084c DS |
2123 | if (IS_ZEBRA_DEBUG_MPLS) |
2124 | zlog_debug ("Update fec %s new label %u", buf, in_label); | |
2125 | ||
2126 | fec->label = in_label; | |
5aba114a | 2127 | fec_update_clients (fec); |
a64448ba DS |
2128 | |
2129 | /* Update label forwarding entries appropriately */ | |
2130 | ret = fec_change_update_lsp (zvrf, fec, old_label); | |
f31e084c DS |
2131 | } |
2132 | ||
2133 | return ret; | |
2134 | } | |
2135 | ||
2136 | /* | |
5aba114a DS |
2137 | * Remove static FEC to label binding. If there are no clients registered |
2138 | * for this FEC, delete the FEC; else notify clients | |
28d58fd7 VV |
2139 | * Note: Upon delete of static binding, if label index exists for this FEC, |
2140 | * client may need to be updated with derived label. | |
f31e084c DS |
2141 | */ |
2142 | int | |
2143 | zebra_mpls_static_fec_del (struct zebra_vrf *zvrf, struct prefix *p) | |
2144 | { | |
2145 | struct route_table *table; | |
2146 | zebra_fec_t *fec; | |
a64448ba | 2147 | mpls_label_t old_label; |
f31e084c DS |
2148 | char buf[BUFSIZ]; |
2149 | ||
2150 | table = zvrf->fec_table[family2afi(PREFIX_FAMILY(p))]; | |
2151 | if (!table) | |
2152 | return -1; | |
2153 | ||
2154 | fec = fec_find (table, p); | |
2155 | if (!fec) | |
2156 | { | |
2157 | prefix2str(p, buf, BUFSIZ); | |
2158 | zlog_err("Failed to find FEC %s upon delete", buf); | |
2159 | return -1; | |
2160 | } | |
2161 | ||
2162 | if (IS_ZEBRA_DEBUG_MPLS) | |
2163 | { | |
2164 | prefix2str(p, buf, BUFSIZ); | |
28d58fd7 VV |
2165 | zlog_debug ("Delete fec %s label index %u", |
2166 | buf, fec->label_index); | |
f31e084c DS |
2167 | } |
2168 | ||
a64448ba | 2169 | old_label = fec->label; |
5aba114a DS |
2170 | fec->flags &= ~FEC_FLAG_CONFIGURED; |
2171 | fec->label = MPLS_INVALID_LABEL; | |
2172 | ||
2173 | /* If no client exists, just delete the FEC. */ | |
2174 | if (list_isempty(fec->client_list)) | |
2175 | { | |
2176 | fec_del (fec); | |
2177 | return 0; | |
2178 | } | |
2179 | ||
28d58fd7 VV |
2180 | /* Derive the local label (from label index) or reset it. */ |
2181 | fec_derive_label_from_index (zvrf, fec); | |
2182 | ||
2183 | /* If there is a label change, update clients. */ | |
2184 | if (fec->label == old_label) | |
2185 | return 0; | |
5aba114a DS |
2186 | fec_update_clients (fec); |
2187 | ||
a64448ba DS |
2188 | /* Update label forwarding entries appropriately */ |
2189 | return fec_change_update_lsp (zvrf, fec, old_label); | |
f31e084c DS |
2190 | } |
2191 | ||
2192 | /* | |
2193 | * Display MPLS FEC to label binding configuration (VTY command handler). | |
2194 | */ | |
2195 | int | |
2196 | zebra_mpls_write_fec_config (struct vty *vty, struct zebra_vrf *zvrf) | |
2197 | { | |
2198 | struct route_node *rn; | |
2199 | int af; | |
2200 | zebra_fec_t *fec; | |
2201 | char buf[BUFSIZ]; | |
2202 | int write = 0; | |
2203 | ||
2204 | for (af = AFI_IP; af < AFI_MAX; af++) | |
2205 | { | |
2206 | if (zvrf->fec_table[af] == NULL) | |
2207 | continue; | |
2208 | ||
2209 | for (rn = route_top(zvrf->fec_table[af]); rn; rn = route_next(rn)) | |
2210 | { | |
2211 | if (!rn->info) | |
2212 | continue; | |
2213 | ||
2214 | char lstr[BUFSIZ]; | |
2215 | fec = rn->info; | |
2216 | ||
2217 | if (!(fec->flags & FEC_FLAG_CONFIGURED)) | |
2218 | continue; | |
2219 | ||
2220 | write = 1; | |
2221 | prefix2str(&rn->p, buf, BUFSIZ); | |
2222 | vty_out(vty, "mpls label bind %s %s%s", buf, | |
2223 | label2str(fec->label, lstr, BUFSIZ), VTY_NEWLINE); | |
2224 | } | |
2225 | } | |
2226 | ||
2227 | return write; | |
2228 | } | |
2229 | ||
2230 | /* | |
2231 | * Display MPLS FEC to label binding (VTY command handler). | |
2232 | */ | |
2233 | void | |
2234 | zebra_mpls_print_fec_table (struct vty *vty, struct zebra_vrf *zvrf) | |
2235 | { | |
2236 | struct route_node *rn; | |
2237 | int af; | |
2238 | ||
2239 | for (af = AFI_IP; af < AFI_MAX; af++) | |
2240 | { | |
2241 | if (zvrf->fec_table[af] == NULL) | |
2242 | continue; | |
2243 | ||
2244 | for (rn = route_top(zvrf->fec_table[af]); rn; rn = route_next(rn)) | |
2245 | { | |
2246 | if (!rn->info) | |
2247 | continue; | |
2248 | fec_print (rn->info, vty); | |
2249 | } | |
2250 | } | |
2251 | } | |
2252 | ||
2253 | /* | |
2254 | * Display MPLS FEC to label binding for a specific FEC (VTY command handler). | |
2255 | */ | |
2256 | void | |
2257 | zebra_mpls_print_fec (struct vty *vty, struct zebra_vrf *zvrf, struct prefix *p) | |
2258 | { | |
2259 | struct route_table *table; | |
2260 | struct route_node *rn; | |
2261 | ||
2262 | table = zvrf->fec_table[family2afi(PREFIX_FAMILY(p))]; | |
2263 | if (!table) | |
2264 | return; | |
2265 | ||
2266 | apply_mask (p); | |
2267 | rn = route_node_lookup(table, p); | |
2268 | if (!rn) | |
2269 | return; | |
2270 | ||
2271 | route_unlock_node(rn); | |
2272 | if (!rn->info) | |
2273 | return; | |
2274 | ||
2275 | fec_print (rn->info, vty); | |
2276 | } | |
2277 | ||
ce549947 RW |
2278 | /* |
2279 | * Install/uninstall a FEC-To-NHLFE (FTN) binding. | |
2280 | */ | |
2281 | int | |
2282 | mpls_ftn_update (int add, struct zebra_vrf *zvrf, enum lsp_types_t type, | |
88d88a9c RW |
2283 | struct prefix *prefix, enum nexthop_types_t gtype, |
2284 | union g_addr *gate, ifindex_t ifindex, u_int8_t distance, | |
ce549947 RW |
2285 | mpls_label_t out_label) |
2286 | { | |
2287 | struct route_table *table; | |
2288 | struct route_node *rn; | |
2289 | struct rib *rib; | |
2290 | struct nexthop *nexthop; | |
2291 | ||
2292 | /* Lookup table. */ | |
661512bf | 2293 | table = zebra_vrf_table (family2afi(prefix->family), SAFI_UNICAST, zvrf_id (zvrf)); |
ce549947 RW |
2294 | if (! table) |
2295 | return -1; | |
2296 | ||
2297 | /* Lookup existing route */ | |
2298 | rn = route_node_get (table, prefix); | |
2299 | RNODE_FOREACH_RIB (rn, rib) | |
2300 | { | |
2301 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
2302 | continue; | |
2303 | if (rib->distance == distance) | |
2304 | break; | |
2305 | } | |
2306 | ||
2307 | if (rib == NULL) | |
2308 | return -1; | |
2309 | ||
2310 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
88d88a9c | 2311 | { |
4312ff1c | 2312 | switch (nexthop->type) |
88d88a9c RW |
2313 | { |
2314 | case NEXTHOP_TYPE_IPV4: | |
2315 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
4312ff1c RW |
2316 | if (gtype != NEXTHOP_TYPE_IPV4 && gtype != NEXTHOP_TYPE_IPV4_IFINDEX) |
2317 | continue; | |
ce549947 RW |
2318 | if (! IPV4_ADDR_SAME (&nexthop->gate.ipv4, &gate->ipv4)) |
2319 | continue; | |
4312ff1c RW |
2320 | if (nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX && |
2321 | nexthop->ifindex != ifindex) | |
ce549947 | 2322 | continue; |
88d88a9c RW |
2323 | goto found; |
2324 | case NEXTHOP_TYPE_IPV6: | |
2325 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
4312ff1c RW |
2326 | if (gtype != NEXTHOP_TYPE_IPV6 && gtype != NEXTHOP_TYPE_IPV6_IFINDEX) |
2327 | continue; | |
ce549947 RW |
2328 | if (! IPV6_ADDR_SAME (&nexthop->gate.ipv6, &gate->ipv6)) |
2329 | continue; | |
4312ff1c RW |
2330 | if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX && |
2331 | nexthop->ifindex != ifindex) | |
88d88a9c | 2332 | continue; |
ce549947 | 2333 | goto found; |
ce549947 RW |
2334 | default: |
2335 | break; | |
88d88a9c RW |
2336 | } |
2337 | } | |
ce549947 RW |
2338 | /* nexthop not found */ |
2339 | return -1; | |
2340 | ||
2341 | found: | |
daca38ae | 2342 | if (add && nexthop->nh_label_type == ZEBRA_LSP_NONE) |
ce549947 | 2343 | nexthop_add_labels (nexthop, type, 1, &out_label); |
daca38ae | 2344 | else if (!add && nexthop->nh_label_type == type) |
ce549947 | 2345 | nexthop_del_labels (nexthop); |
daca38ae RW |
2346 | else |
2347 | return 0; | |
ce549947 RW |
2348 | |
2349 | SET_FLAG (rib->status, RIB_ENTRY_CHANGED); | |
2350 | SET_FLAG (rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); | |
2351 | rib_queue_add (rn); | |
2352 | ||
2353 | return 0; | |
2354 | } | |
2355 | ||
2356 | /* | |
2357 | * Install/update a NHLFE for an LSP in the forwarding table. This may be | |
2358 | * a new LSP entry or a new NHLFE for an existing in-label or an update of | |
2359 | * the out-label for an existing NHLFE (update case). | |
2360 | */ | |
2361 | int | |
2362 | mpls_lsp_install (struct zebra_vrf *zvrf, enum lsp_types_t type, | |
2363 | mpls_label_t in_label, mpls_label_t out_label, | |
2364 | enum nexthop_types_t gtype, union g_addr *gate, | |
a64448ba | 2365 | ifindex_t ifindex) |
ce549947 RW |
2366 | { |
2367 | struct hash *lsp_table; | |
2368 | zebra_ile_t tmp_ile; | |
2369 | zebra_lsp_t *lsp; | |
2370 | zebra_nhlfe_t *nhlfe; | |
2371 | char buf[BUFSIZ]; | |
2372 | ||
2373 | /* Lookup table. */ | |
2374 | lsp_table = zvrf->lsp_table; | |
2375 | if (!lsp_table) | |
2376 | return -1; | |
2377 | ||
2378 | /* If entry is present, exit. */ | |
2379 | tmp_ile.in_label = in_label; | |
2380 | lsp = hash_get (lsp_table, &tmp_ile, lsp_alloc); | |
2381 | if (!lsp) | |
2382 | return -1; | |
a64448ba | 2383 | nhlfe = nhlfe_find (lsp, type, gtype, gate, ifindex); |
ce549947 RW |
2384 | if (nhlfe) |
2385 | { | |
2386 | struct nexthop *nh = nhlfe->nexthop; | |
2387 | ||
2388 | assert (nh); | |
2389 | assert (nh->nh_label); | |
2390 | ||
2391 | /* Clear deleted flag (in case it was set) */ | |
2392 | UNSET_FLAG (nhlfe->flags, NHLFE_FLAG_DELETED); | |
2393 | if (nh->nh_label->label[0] == out_label) | |
2394 | /* No change */ | |
2395 | return 0; | |
2396 | ||
2397 | if (IS_ZEBRA_DEBUG_MPLS) | |
2398 | { | |
2399 | nhlfe2str (nhlfe, buf, BUFSIZ); | |
2400 | zlog_debug ("LSP in-label %u type %d nexthop %s " | |
2401 | "out-label changed to %u (old %u)", | |
2402 | in_label, type, buf, | |
2403 | out_label, nh->nh_label->label[0]); | |
2404 | } | |
2405 | ||
2406 | /* Update out label, trigger processing. */ | |
2407 | nh->nh_label->label[0] = out_label; | |
2408 | } | |
2409 | else | |
2410 | { | |
2411 | /* Add LSP entry to this nexthop */ | |
a64448ba | 2412 | nhlfe = nhlfe_add (lsp, type, gtype, gate, ifindex, out_label); |
ce549947 RW |
2413 | if (!nhlfe) |
2414 | return -1; | |
2415 | ||
2416 | if (IS_ZEBRA_DEBUG_MPLS) | |
2417 | { | |
2418 | nhlfe2str (nhlfe, buf, BUFSIZ); | |
2419 | zlog_debug ("Add LSP in-label %u type %d nexthop %s " | |
2420 | "out-label %u", in_label, type, buf, out_label); | |
2421 | } | |
2422 | ||
2423 | lsp->addr_family = NHLFE_FAMILY (nhlfe); | |
2424 | } | |
2425 | ||
2426 | /* Mark NHLFE, queue LSP for processing. */ | |
2427 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_CHANGED); | |
2428 | if (lsp_processq_add (lsp)) | |
2429 | return -1; | |
2430 | ||
2431 | return 0; | |
2432 | } | |
2433 | ||
2434 | /* | |
2435 | * Uninstall a particular NHLFE in the forwarding table. If this is | |
2436 | * the only NHLFE, the entire LSP forwarding entry has to be deleted. | |
2437 | */ | |
2438 | int | |
2439 | mpls_lsp_uninstall (struct zebra_vrf *zvrf, enum lsp_types_t type, | |
2440 | mpls_label_t in_label, enum nexthop_types_t gtype, | |
a64448ba | 2441 | union g_addr *gate, ifindex_t ifindex) |
ce549947 RW |
2442 | { |
2443 | struct hash *lsp_table; | |
2444 | zebra_ile_t tmp_ile; | |
2445 | zebra_lsp_t *lsp; | |
2446 | zebra_nhlfe_t *nhlfe; | |
2447 | char buf[BUFSIZ]; | |
2448 | ||
2449 | /* Lookup table. */ | |
2450 | lsp_table = zvrf->lsp_table; | |
2451 | if (!lsp_table) | |
2452 | return -1; | |
2453 | ||
2454 | /* If entry is not present, exit. */ | |
2455 | tmp_ile.in_label = in_label; | |
2456 | lsp = hash_lookup (lsp_table, &tmp_ile); | |
2457 | if (!lsp) | |
2458 | return 0; | |
a64448ba | 2459 | nhlfe = nhlfe_find (lsp, type, gtype, gate, ifindex); |
ce549947 RW |
2460 | if (!nhlfe) |
2461 | return 0; | |
2462 | ||
2463 | if (IS_ZEBRA_DEBUG_MPLS) | |
2464 | { | |
2465 | nhlfe2str (nhlfe, buf, BUFSIZ); | |
2466 | zlog_debug ("Del LSP in-label %u type %d nexthop %s flags 0x%x", | |
2467 | in_label, type, buf, nhlfe->flags); | |
2468 | } | |
2469 | ||
2470 | /* Mark NHLFE for delete or directly delete, as appropriate. */ | |
2471 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED)) | |
2472 | { | |
2473 | UNSET_FLAG (nhlfe->flags, NHLFE_FLAG_CHANGED); | |
2474 | SET_FLAG (nhlfe->flags, NHLFE_FLAG_DELETED); | |
2475 | if (lsp_processq_add (lsp)) | |
2476 | return -1; | |
2477 | } | |
2478 | else | |
2479 | { | |
2480 | nhlfe_del (nhlfe); | |
2481 | ||
2482 | /* Free LSP entry if no other NHLFEs and not scheduled. */ | |
2483 | if (!lsp->nhlfe_list && | |
2484 | !CHECK_FLAG (lsp->flags, LSP_FLAG_SCHEDULED)) | |
2485 | { | |
2486 | if (IS_ZEBRA_DEBUG_MPLS) | |
2487 | zlog_debug ("Free LSP in-label %u flags 0x%x", | |
2488 | lsp->ile.in_label, lsp->flags); | |
2489 | ||
2490 | lsp = hash_release(lsp_table, &lsp->ile); | |
2491 | if (lsp) | |
2492 | XFREE(MTYPE_LSP, lsp); | |
2493 | } | |
2494 | } | |
2495 | return 0; | |
2496 | } | |
2497 | ||
2498 | /* | |
2499 | * Uninstall all LDP NHLFEs for a particular LSP forwarding entry. | |
2500 | * If no other NHLFEs exist, the entry would be deleted. | |
2501 | */ | |
2502 | void | |
2503 | mpls_ldp_lsp_uninstall_all (struct hash_backet *backet, void *ctxt) | |
2504 | { | |
2505 | zebra_lsp_t *lsp; | |
2506 | struct hash *lsp_table; | |
2507 | ||
2508 | lsp = (zebra_lsp_t *) backet->data; | |
2509 | if (!lsp || !lsp->nhlfe_list) | |
2510 | return; | |
2511 | ||
2512 | lsp_table = ctxt; | |
2513 | if (!lsp_table) | |
2514 | return; | |
2515 | ||
2516 | mpls_lsp_uninstall_all (lsp_table, lsp, ZEBRA_LSP_LDP); | |
2517 | } | |
2518 | ||
2519 | /* | |
2520 | * Uninstall all LDP FEC-To-NHLFE (FTN) bindings of the given address-family. | |
2521 | */ | |
2522 | void | |
2523 | mpls_ldp_ftn_uninstall_all (struct zebra_vrf *zvrf, int afi) | |
2524 | { | |
2525 | struct route_table *table; | |
2526 | struct route_node *rn; | |
2527 | struct rib *rib; | |
2528 | struct nexthop *nexthop; | |
2529 | int update; | |
2530 | ||
2531 | /* Process routes of interested address-families. */ | |
661512bf | 2532 | table = zebra_vrf_table (afi, SAFI_UNICAST, zvrf_id (zvrf)); |
ce549947 RW |
2533 | if (!table) |
2534 | return; | |
2535 | ||
2536 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
2537 | { | |
2538 | update = 0; | |
2539 | RNODE_FOREACH_RIB (rn, rib) | |
2540 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2541 | if (nexthop->nh_label_type == ZEBRA_LSP_LDP) | |
2542 | { | |
2543 | nexthop_del_labels (nexthop); | |
2544 | SET_FLAG (rib->status, RIB_ENTRY_CHANGED); | |
2545 | SET_FLAG (rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); | |
2546 | update = 1; | |
2547 | } | |
2548 | ||
2549 | if (update) | |
2550 | rib_queue_add (rn); | |
2551 | } | |
2552 | } | |
2553 | ||
1c1cf002 | 2554 | #if defined(HAVE_CUMULUS) |
7758e3f3 | 2555 | /* |
2556 | * Check that the label values used in LSP creation are consistent. The | |
2557 | * main criteria is that if there is ECMP, the label operation must still | |
2558 | * be consistent - i.e., all paths either do a swap or do PHP. This is due | |
2559 | * to current HW restrictions. | |
2560 | */ | |
2561 | int | |
2562 | zebra_mpls_lsp_label_consistent (struct zebra_vrf *zvrf, mpls_label_t in_label, | |
2563 | mpls_label_t out_label, enum nexthop_types_t gtype, | |
a64448ba | 2564 | union g_addr *gate, ifindex_t ifindex) |
7758e3f3 | 2565 | { |
2566 | struct hash *slsp_table; | |
2567 | zebra_ile_t tmp_ile; | |
2568 | zebra_slsp_t *slsp; | |
2569 | zebra_snhlfe_t *snhlfe; | |
2570 | ||
2571 | /* Lookup table. */ | |
2572 | slsp_table = zvrf->slsp_table; | |
2573 | if (!slsp_table) | |
2574 | return 0; | |
2575 | ||
2576 | /* If entry is not present, exit. */ | |
2577 | tmp_ile.in_label = in_label; | |
2578 | slsp = hash_lookup (slsp_table, &tmp_ile); | |
2579 | if (!slsp) | |
2580 | return 1; | |
2581 | ||
a64448ba | 2582 | snhlfe = snhlfe_find (slsp, gtype, gate, ifindex); |
7758e3f3 | 2583 | if (snhlfe) |
2584 | { | |
2585 | if (snhlfe->out_label == out_label) | |
2586 | return 1; | |
2587 | ||
2588 | /* If not only NHLFE, cannot allow label change. */ | |
2589 | if (snhlfe != slsp->snhlfe_list || | |
2590 | snhlfe->next) | |
2591 | return 0; | |
2592 | } | |
2593 | else | |
2594 | { | |
2595 | /* If other NHLFEs exist, label operation must match. */ | |
2596 | if (slsp->snhlfe_list) | |
2597 | { | |
2598 | int cur_op, new_op; | |
2599 | ||
2600 | cur_op = (slsp->snhlfe_list->out_label == MPLS_IMP_NULL_LABEL); | |
2601 | new_op = (out_label == MPLS_IMP_NULL_LABEL); | |
2602 | if (cur_op != new_op) | |
2603 | return 0; | |
2604 | } | |
2605 | } | |
2606 | ||
2607 | /* Label values are good. */ | |
2608 | return 1; | |
2609 | } | |
1c1cf002 | 2610 | #endif /* HAVE_CUMULUS */ |
7758e3f3 | 2611 | |
2612 | /* | |
2613 | * Add static LSP entry. This may be the first entry for this incoming label | |
2614 | * or an additional nexthop; an existing entry may also have outgoing label | |
2615 | * changed. | |
2616 | * Note: The label operation (swap or PHP) is common for the LSP entry (all | |
2617 | * NHLFEs). | |
2618 | */ | |
2619 | int | |
2620 | zebra_mpls_static_lsp_add (struct zebra_vrf *zvrf, mpls_label_t in_label, | |
2621 | mpls_label_t out_label, enum nexthop_types_t gtype, | |
a64448ba | 2622 | union g_addr *gate, ifindex_t ifindex) |
7758e3f3 | 2623 | { |
2624 | struct hash *slsp_table; | |
2625 | zebra_ile_t tmp_ile; | |
2626 | zebra_slsp_t *slsp; | |
2627 | zebra_snhlfe_t *snhlfe; | |
2628 | char buf[BUFSIZ]; | |
2629 | ||
2630 | /* Lookup table. */ | |
2631 | slsp_table = zvrf->slsp_table; | |
2632 | if (!slsp_table) | |
2633 | return -1; | |
2634 | ||
2635 | /* If entry is present, exit. */ | |
2636 | tmp_ile.in_label = in_label; | |
2637 | slsp = hash_get (slsp_table, &tmp_ile, slsp_alloc); | |
2638 | if (!slsp) | |
2639 | return -1; | |
a64448ba | 2640 | snhlfe = snhlfe_find (slsp, gtype, gate, ifindex); |
7758e3f3 | 2641 | if (snhlfe) |
2642 | { | |
2643 | if (snhlfe->out_label == out_label) | |
2644 | /* No change */ | |
2645 | return 0; | |
2646 | ||
2647 | if (IS_ZEBRA_DEBUG_MPLS) | |
2648 | { | |
2649 | snhlfe2str (snhlfe, buf, BUFSIZ); | |
2650 | zlog_debug ("Upd static LSP in-label %u nexthop %s " | |
2651 | "out-label %u (old %u)", | |
2652 | in_label, buf, out_label, snhlfe->out_label); | |
2653 | } | |
2654 | snhlfe->out_label = out_label; | |
2655 | } | |
2656 | else | |
2657 | { | |
2658 | /* Add static LSP entry to this nexthop */ | |
a64448ba | 2659 | snhlfe = snhlfe_add (slsp, gtype, gate, ifindex, out_label); |
7758e3f3 | 2660 | if (!snhlfe) |
2661 | return -1; | |
2662 | ||
2663 | if (IS_ZEBRA_DEBUG_MPLS) | |
2664 | { | |
2665 | snhlfe2str (snhlfe, buf, BUFSIZ); | |
2666 | zlog_debug ("Add static LSP in-label %u nexthop %s out-label %u", | |
2667 | in_label, buf, out_label); | |
2668 | } | |
2669 | } | |
2670 | ||
40c7bdb0 | 2671 | /* (Re)Install LSP in the main table. */ |
ce549947 | 2672 | if (mpls_lsp_install (zvrf, ZEBRA_LSP_STATIC, in_label, out_label, gtype, |
a64448ba | 2673 | gate, ifindex)) |
40c7bdb0 | 2674 | return -1; |
2675 | ||
7758e3f3 | 2676 | return 0; |
2677 | } | |
2678 | ||
2679 | /* | |
2680 | * Delete static LSP entry. This may be the delete of one particular | |
2681 | * NHLFE for this incoming label or the delete of the entire entry (i.e., | |
2682 | * all NHLFEs). | |
2683 | * NOTE: Delete of the only NHLFE will also end up deleting the entire | |
2684 | * LSP configuration. | |
2685 | */ | |
2686 | int | |
2687 | zebra_mpls_static_lsp_del (struct zebra_vrf *zvrf, mpls_label_t in_label, | |
2688 | enum nexthop_types_t gtype, union g_addr *gate, | |
a64448ba | 2689 | ifindex_t ifindex) |
7758e3f3 | 2690 | { |
2691 | struct hash *slsp_table; | |
2692 | zebra_ile_t tmp_ile; | |
2693 | zebra_slsp_t *slsp; | |
2694 | zebra_snhlfe_t *snhlfe; | |
2695 | ||
2696 | /* Lookup table. */ | |
2697 | slsp_table = zvrf->slsp_table; | |
2698 | if (!slsp_table) | |
2699 | return -1; | |
2700 | ||
2701 | /* If entry is not present, exit. */ | |
2702 | tmp_ile.in_label = in_label; | |
2703 | slsp = hash_lookup (slsp_table, &tmp_ile); | |
2704 | if (!slsp) | |
2705 | return 0; | |
2706 | ||
2707 | /* Is it delete of entire LSP or a specific NHLFE? */ | |
2708 | if (gtype == NEXTHOP_TYPE_BLACKHOLE) | |
2709 | { | |
2710 | if (IS_ZEBRA_DEBUG_MPLS) | |
2711 | zlog_debug ("Del static LSP in-label %u", in_label); | |
2712 | ||
40c7bdb0 | 2713 | /* Uninstall entire LSP from the main table. */ |
ce549947 | 2714 | mpls_static_lsp_uninstall_all (zvrf, in_label); |
40c7bdb0 | 2715 | |
7758e3f3 | 2716 | /* Delete all static NHLFEs */ |
2717 | snhlfe_del_all (slsp); | |
2718 | } | |
2719 | else | |
2720 | { | |
2721 | /* Find specific NHLFE, exit if not found. */ | |
a64448ba | 2722 | snhlfe = snhlfe_find (slsp, gtype, gate, ifindex); |
7758e3f3 | 2723 | if (!snhlfe) |
2724 | return 0; | |
2725 | ||
2726 | if (IS_ZEBRA_DEBUG_MPLS) | |
2727 | { | |
2728 | char buf[BUFSIZ]; | |
2729 | snhlfe2str (snhlfe, buf, BUFSIZ); | |
2730 | zlog_debug ("Del static LSP in-label %u nexthop %s", | |
2731 | in_label, buf); | |
2732 | } | |
2733 | ||
40c7bdb0 | 2734 | /* Uninstall LSP from the main table. */ |
ce549947 | 2735 | mpls_lsp_uninstall (zvrf, ZEBRA_LSP_STATIC, in_label, gtype, gate, |
a64448ba | 2736 | ifindex); |
40c7bdb0 | 2737 | |
7758e3f3 | 2738 | /* Delete static LSP NHLFE */ |
2739 | snhlfe_del (snhlfe); | |
2740 | } | |
2741 | ||
2742 | /* Remove entire static LSP entry if no NHLFE - valid in either case above. */ | |
2743 | if (!slsp->snhlfe_list) | |
2744 | { | |
2745 | slsp = hash_release(slsp_table, &tmp_ile); | |
2746 | if (slsp) | |
2747 | XFREE(MTYPE_SLSP, slsp); | |
2748 | } | |
2749 | ||
2750 | return 0; | |
2751 | } | |
2752 | ||
40c7bdb0 | 2753 | /* |
2754 | * Schedule all MPLS label forwarding entries for processing. | |
2755 | * Called upon changes that may affect one or more of them such as | |
2756 | * interface or nexthop state changes. | |
2757 | */ | |
2758 | void | |
2759 | zebra_mpls_lsp_schedule (struct zebra_vrf *zvrf) | |
2760 | { | |
2761 | if (!zvrf) | |
2762 | return; | |
2763 | hash_iterate(zvrf->lsp_table, lsp_schedule, NULL); | |
2764 | } | |
2765 | ||
3ab18ff2 | 2766 | /* |
2767 | * Display MPLS label forwarding table for a specific LSP | |
2768 | * (VTY command handler). | |
2769 | */ | |
2770 | void | |
b78b820d | 2771 | zebra_mpls_print_lsp (struct vty *vty, struct zebra_vrf *zvrf, mpls_label_t label, |
2772 | u_char use_json) | |
3ab18ff2 | 2773 | { |
2774 | struct hash *lsp_table; | |
2775 | zebra_lsp_t *lsp; | |
2776 | zebra_ile_t tmp_ile; | |
b78b820d | 2777 | json_object *json = NULL; |
3ab18ff2 | 2778 | |
2779 | /* Lookup table. */ | |
2780 | lsp_table = zvrf->lsp_table; | |
2781 | if (!lsp_table) | |
2782 | return; | |
2783 | ||
2784 | /* If entry is not present, exit. */ | |
2785 | tmp_ile.in_label = label; | |
2786 | lsp = hash_lookup (lsp_table, &tmp_ile); | |
2787 | if (!lsp) | |
2788 | return; | |
2789 | ||
b78b820d | 2790 | if (use_json) |
2791 | { | |
2792 | json = lsp_json(lsp); | |
2aac5767 | 2793 | vty_out (vty, "%s%s", json_object_to_json_string_ext(json, JSON_C_TO_STRING_PRETTY), VTY_NEWLINE); |
b78b820d | 2794 | json_object_free(json); |
2795 | } | |
2796 | else | |
2797 | lsp_print (lsp, (void *)vty); | |
3ab18ff2 | 2798 | } |
2799 | ||
2800 | /* | |
2801 | * Display MPLS label forwarding table (VTY command handler). | |
2802 | */ | |
2803 | void | |
b78b820d | 2804 | zebra_mpls_print_lsp_table (struct vty *vty, struct zebra_vrf *zvrf, |
2805 | u_char use_json) | |
3ab18ff2 | 2806 | { |
b78b820d | 2807 | char buf[BUFSIZ]; |
2808 | json_object *json = NULL; | |
2809 | zebra_lsp_t *lsp = NULL; | |
2810 | zebra_nhlfe_t *nhlfe = NULL; | |
2811 | struct nexthop *nexthop = NULL; | |
2812 | struct listnode *node = NULL; | |
2813 | struct list *lsp_list = hash_get_sorted_list(zvrf->lsp_table, lsp_cmp); | |
2814 | ||
2815 | if (use_json) | |
2816 | { | |
2817 | json = json_object_new_object(); | |
2818 | ||
2819 | for (ALL_LIST_ELEMENTS_RO(lsp_list, node, lsp)) | |
2820 | json_object_object_add(json, label2str(lsp->ile.in_label, buf, BUFSIZ), | |
2821 | lsp_json(lsp)); | |
2822 | ||
2aac5767 | 2823 | vty_out (vty, "%s%s", json_object_to_json_string_ext(json, JSON_C_TO_STRING_PRETTY), VTY_NEWLINE); |
b78b820d | 2824 | json_object_free(json); |
2825 | } | |
2826 | else | |
2827 | { | |
2828 | vty_out (vty, " Inbound Outbound%s", VTY_NEWLINE); | |
2829 | vty_out (vty, " Label Type Nexthop Label%s", VTY_NEWLINE); | |
2830 | vty_out (vty, "-------- ------- --------------- --------%s", VTY_NEWLINE); | |
2831 | ||
2832 | for (ALL_LIST_ELEMENTS_RO(lsp_list, node, lsp)) | |
2833 | { | |
2834 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) | |
2835 | { | |
2836 | vty_out (vty, "%8d %7s ", lsp->ile.in_label, nhlfe_type2str(nhlfe->type)); | |
2837 | nexthop = nhlfe->nexthop; | |
2838 | ||
2839 | switch (nexthop->type) | |
2840 | { | |
2841 | case NEXTHOP_TYPE_IPV4: | |
88d88a9c | 2842 | case NEXTHOP_TYPE_IPV4_IFINDEX: |
b78b820d | 2843 | vty_out (vty, "%15s", inet_ntoa (nexthop->gate.ipv4)); |
2844 | break; | |
2845 | case NEXTHOP_TYPE_IPV6: | |
2846 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
2847 | vty_out (vty, "%15s", inet_ntop (AF_INET6, &nexthop->gate.ipv6, buf, BUFSIZ)); | |
2848 | break; | |
2849 | default: | |
2850 | break; | |
2851 | } | |
2852 | ||
2853 | vty_out (vty, " %8d%s", nexthop->nh_label->label[0], VTY_NEWLINE); | |
2854 | } | |
2855 | } | |
2856 | ||
2857 | vty_out (vty, "%s", VTY_NEWLINE); | |
2858 | } | |
2859 | ||
58ac32e2 | 2860 | list_delete (lsp_list); |
3ab18ff2 | 2861 | } |
2862 | ||
7758e3f3 | 2863 | /* |
2864 | * Display MPLS LSP configuration of all static LSPs (VTY command handler). | |
2865 | */ | |
2866 | int | |
2867 | zebra_mpls_write_lsp_config (struct vty *vty, struct zebra_vrf *zvrf) | |
2868 | { | |
b78b820d | 2869 | zebra_slsp_t *slsp; |
2870 | zebra_snhlfe_t *snhlfe; | |
2871 | struct listnode *node; | |
b78b820d | 2872 | struct list *slsp_list = hash_get_sorted_list(zvrf->slsp_table, slsp_cmp); |
2873 | ||
2874 | for (ALL_LIST_ELEMENTS_RO(slsp_list, node, slsp)) | |
2875 | { | |
2876 | for (snhlfe = slsp->snhlfe_list; snhlfe; snhlfe = snhlfe->next) | |
2877 | { | |
e64f3c32 | 2878 | char buf[INET6_ADDRSTRLEN]; |
b78b820d | 2879 | char lstr[30]; |
e64f3c32 | 2880 | |
b78b820d | 2881 | snhlfe2str (snhlfe, buf, BUFSIZ); |
e64f3c32 RW |
2882 | switch (snhlfe->out_label) { |
2883 | case MPLS_V4_EXP_NULL_LABEL: | |
2884 | case MPLS_V6_EXP_NULL_LABEL: | |
2885 | strlcpy(lstr, "explicit-null", sizeof(lstr)); | |
2886 | break; | |
2887 | case MPLS_IMP_NULL_LABEL: | |
2888 | strlcpy(lstr, "implicit-null", sizeof(lstr)); | |
2889 | break; | |
2890 | default: | |
2891 | sprintf(lstr, "%u", snhlfe->out_label); | |
2892 | break; | |
2893 | } | |
2894 | ||
b78b820d | 2895 | vty_out (vty, "mpls lsp %u %s %s%s", |
e64f3c32 | 2896 | slsp->ile.in_label, buf, lstr, VTY_NEWLINE); |
b78b820d | 2897 | } |
2898 | } | |
2899 | ||
58ac32e2 | 2900 | list_delete (slsp_list); |
7758e3f3 | 2901 | return (zvrf->slsp_table->count ? 1 : 0); |
2902 | } | |
2903 | ||
1b6d5c7e VV |
2904 | /* |
2905 | * Add/update global label block. | |
2906 | */ | |
2907 | int | |
2908 | zebra_mpls_label_block_add (struct zebra_vrf *zvrf, u_int32_t start_label, | |
2909 | u_int32_t end_label) | |
2910 | { | |
2911 | zvrf->mpls_srgb.start_label = start_label; | |
2912 | zvrf->mpls_srgb.end_label = end_label; | |
28d58fd7 VV |
2913 | |
2914 | /* Evaluate registered FECs to see if any get a label or not. */ | |
2915 | fec_evaluate (zvrf, 1); | |
1b6d5c7e VV |
2916 | return 0; |
2917 | } | |
2918 | ||
2919 | /* | |
2920 | * Delete global label block. | |
2921 | */ | |
2922 | int | |
2923 | zebra_mpls_label_block_del (struct zebra_vrf *zvrf) | |
2924 | { | |
2925 | zvrf->mpls_srgb.start_label = 0; | |
2926 | zvrf->mpls_srgb.end_label = 0; | |
28d58fd7 VV |
2927 | |
2928 | /* Process registered FECs to clear their local label, if needed. */ | |
2929 | fec_evaluate (zvrf, 0); | |
1b6d5c7e VV |
2930 | return 0; |
2931 | } | |
2932 | ||
2933 | /* | |
2934 | * Display MPLS global label block configuration (VTY command handler). | |
2935 | */ | |
2936 | int | |
2937 | zebra_mpls_write_label_block_config (struct vty *vty, struct zebra_vrf *zvrf) | |
2938 | { | |
2939 | if (zvrf->mpls_srgb.start_label == 0) | |
2940 | return 0; | |
2941 | ||
2942 | vty_out(vty, "mpls label global-block %u %u%s", | |
2943 | zvrf->mpls_srgb.start_label, zvrf->mpls_srgb.end_label, | |
2944 | VTY_NEWLINE); | |
2945 | ||
2946 | return 1; | |
2947 | } | |
2948 | ||
40c7bdb0 | 2949 | /* |
2950 | * Called upon process exiting, need to delete LSP forwarding | |
2951 | * entries from the kernel. | |
2952 | * NOTE: Currently supported only for default VRF. | |
2953 | */ | |
2954 | void | |
2955 | zebra_mpls_close_tables (struct zebra_vrf *zvrf) | |
2956 | { | |
40c7bdb0 | 2957 | hash_iterate(zvrf->lsp_table, lsp_uninstall_from_kernel, NULL); |
58ac32e2 RW |
2958 | hash_clean(zvrf->lsp_table, NULL); |
2959 | hash_free(zvrf->lsp_table); | |
2960 | hash_clean(zvrf->slsp_table, NULL); | |
2961 | hash_free(zvrf->slsp_table); | |
40c7bdb0 | 2962 | } |
2963 | ||
7758e3f3 | 2964 | /* |
2965 | * Allocate MPLS tables for this VRF and do other initialization. | |
2966 | * NOTE: Currently supported only for default VRF. | |
2967 | */ | |
2968 | void | |
2969 | zebra_mpls_init_tables (struct zebra_vrf *zvrf) | |
2970 | { | |
2971 | if (!zvrf) | |
2972 | return; | |
2973 | zvrf->slsp_table = hash_create(label_hash, label_cmp); | |
40c7bdb0 | 2974 | zvrf->lsp_table = hash_create(label_hash, label_cmp); |
f31e084c DS |
2975 | zvrf->fec_table[AFI_IP] = route_table_init(); |
2976 | zvrf->fec_table[AFI_IP6] = route_table_init(); | |
939fba27 | 2977 | zvrf->mpls_flags = 0; |
1b6d5c7e VV |
2978 | zvrf->mpls_srgb.start_label = 0; |
2979 | zvrf->mpls_srgb.end_label = 0; | |
7758e3f3 | 2980 | } |
2981 | ||
2982 | /* | |
2983 | * Global MPLS initialization. | |
2984 | */ | |
2985 | void | |
2986 | zebra_mpls_init (void) | |
2987 | { | |
33c32282 DW |
2988 | mpls_enabled = 0; |
2989 | ||
fe6c7157 RW |
2990 | if (mpls_kernel_init () < 0) |
2991 | { | |
2992 | zlog_warn ("Disabling MPLS support (no kernel support)"); | |
2993 | return; | |
2994 | } | |
2995 | ||
33c32282 DW |
2996 | if (! mpls_processq_init (&zebrad)) |
2997 | mpls_enabled = 1; | |
7758e3f3 | 2998 | } |