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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 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with GNU Zebra; see the file COPYING. If not, write to the Free | |
18 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
19 | * 02111-1307, USA. | |
20 | */ | |
21 | ||
22 | #include <zebra.h> | |
23 | ||
24 | #include "prefix.h" | |
25 | #include "table.h" | |
26 | #include "memory.h" | |
7758e3f3 | 27 | #include "command.h" |
28 | #include "if.h" | |
29 | #include "log.h" | |
30 | #include "sockunion.h" | |
31 | #include "linklist.h" | |
32 | #include "thread.h" | |
33 | #include "workqueue.h" | |
34 | #include "prefix.h" | |
35 | #include "routemap.h" | |
36 | #include "stream.h" | |
37 | #include "nexthop.h" | |
b78b820d | 38 | #include "lib/json.h" |
7758e3f3 | 39 | |
40 | #include "zebra/rib.h" | |
41 | #include "zebra/rt.h" | |
42 | #include "zebra/zserv.h" | |
43 | #include "zebra/redistribute.h" | |
44 | #include "zebra/debug.h" | |
45 | #include "zebra/zebra_memory.h" | |
46 | #include "zebra/zebra_vrf.h" | |
47 | #include "zebra/zebra_mpls.h" | |
48 | ||
49 | DEFINE_MTYPE_STATIC(ZEBRA, LSP, "MPLS LSP object") | |
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 */ | |
61 | static unsigned int | |
62 | label_hash (void *p); | |
63 | static int | |
64 | label_cmp (const void *p1, const void *p2); | |
40c7bdb0 | 65 | static int |
66 | nhlfe_nexthop_active_ipv4 (zebra_nhlfe_t *nhlfe, struct nexthop *nexthop); | |
67 | static int | |
68 | nhlfe_nexthop_active_ipv6 (zebra_nhlfe_t *nhlfe, struct nexthop *nexthop); | |
69 | static int | |
70 | nhlfe_nexthop_active (zebra_nhlfe_t *nhlfe); | |
71 | static void | |
72 | lsp_select_best_nhlfe (zebra_lsp_t *lsp); | |
73 | static void | |
74 | lsp_uninstall_from_kernel (struct hash_backet *backet, void *ctxt); | |
75 | static void | |
76 | lsp_schedule (struct hash_backet *backet, void *ctxt); | |
77 | static wq_item_status | |
78 | lsp_process (struct work_queue *wq, void *data); | |
79 | static void | |
80 | lsp_processq_del (struct work_queue *wq, void *data); | |
81 | static void | |
82 | lsp_processq_complete (struct work_queue *wq); | |
83 | static int | |
84 | lsp_processq_add (zebra_lsp_t *lsp); | |
85 | static void * | |
86 | lsp_alloc (void *p); | |
87 | static char * | |
88 | nhlfe2str (zebra_nhlfe_t *nhlfe, char *buf, int size); | |
89 | static int | |
90 | nhlfe_nhop_match (zebra_nhlfe_t *nhlfe, enum nexthop_types_t gtype, | |
91 | union g_addr *gate, char *ifname, ifindex_t ifindex); | |
92 | static zebra_nhlfe_t * | |
93 | nhlfe_find (zebra_lsp_t *lsp, enum lsp_types_t lsp_type, | |
94 | enum nexthop_types_t gtype, union g_addr *gate, | |
95 | char *ifname, ifindex_t ifindex); | |
96 | static zebra_nhlfe_t * | |
97 | nhlfe_add (zebra_lsp_t *lsp, enum lsp_types_t lsp_type, | |
98 | enum nexthop_types_t gtype, union g_addr *gate, | |
99 | char *ifname, ifindex_t ifindex, mpls_label_t out_label); | |
100 | static int | |
101 | nhlfe_del (zebra_nhlfe_t *snhlfe); | |
102 | static int | |
ce549947 RW |
103 | mpls_lsp_uninstall_all (struct hash *lsp_table, zebra_lsp_t *lsp, |
104 | enum lsp_types_t type); | |
40c7bdb0 | 105 | static int |
ce549947 | 106 | mpls_static_lsp_uninstall_all (struct zebra_vrf *zvrf, mpls_label_t in_label); |
7758e3f3 | 107 | static void |
3ab18ff2 | 108 | nhlfe_print (zebra_nhlfe_t *nhlfe, struct vty *vty); |
109 | static void | |
110 | lsp_print (zebra_lsp_t *lsp, void *ctxt); | |
7758e3f3 | 111 | static void * |
112 | slsp_alloc (void *p); | |
113 | static int | |
114 | snhlfe_match (zebra_snhlfe_t *snhlfe, enum nexthop_types_t gtype, | |
115 | union g_addr *gate, char *ifname, ifindex_t ifindex); | |
116 | static zebra_snhlfe_t * | |
117 | snhlfe_find (zebra_slsp_t *slsp, enum nexthop_types_t gtype, | |
118 | union g_addr *gate, char *ifname, ifindex_t ifindex); | |
119 | static zebra_snhlfe_t * | |
120 | snhlfe_add (zebra_slsp_t *slsp, enum nexthop_types_t gtype, | |
121 | union g_addr *gate, char *ifname, ifindex_t ifindex, | |
122 | mpls_label_t out_label); | |
123 | static int | |
124 | snhlfe_del (zebra_snhlfe_t *snhlfe); | |
125 | static int | |
126 | snhlfe_del_all (zebra_slsp_t *slsp); | |
127 | static char * | |
128 | snhlfe2str (zebra_snhlfe_t *snhlfe, char *buf, int size); | |
40c7bdb0 | 129 | static void |
130 | mpls_processq_init (struct zebra_t *zebra); | |
7758e3f3 | 131 | |
132 | ||
133 | ||
134 | ||
135 | /* Static functions */ | |
136 | ||
137 | /* | |
138 | * Hash function for label. | |
139 | */ | |
140 | static unsigned int | |
141 | label_hash (void *p) | |
142 | { | |
143 | const zebra_ile_t *ile = p; | |
144 | ||
145 | return (jhash_1word(ile->in_label, 0)); | |
146 | } | |
147 | ||
148 | /* | |
149 | * Compare 2 LSP hash entries based on in-label. | |
150 | */ | |
151 | static int | |
152 | label_cmp (const void *p1, const void *p2) | |
153 | { | |
154 | const zebra_ile_t *ile1 = p1; | |
155 | const zebra_ile_t *ile2 = p2; | |
156 | ||
157 | return (ile1->in_label == ile2->in_label); | |
158 | } | |
159 | ||
40c7bdb0 | 160 | /* |
161 | * Check if an IPv4 nexthop for a NHLFE is active. Update nexthop based on | |
162 | * the passed flag. | |
163 | * NOTE: Looking only for connected routes right now. | |
164 | */ | |
165 | static int | |
166 | nhlfe_nexthop_active_ipv4 (zebra_nhlfe_t *nhlfe, struct nexthop *nexthop) | |
167 | { | |
168 | struct route_table *table; | |
169 | struct prefix_ipv4 p; | |
170 | struct route_node *rn; | |
171 | struct rib *match; | |
88d88a9c | 172 | struct nexthop *match_nh; |
40c7bdb0 | 173 | |
174 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, VRF_DEFAULT); | |
175 | if (!table) | |
176 | return 0; | |
177 | ||
178 | /* Lookup nexthop in IPv4 routing table. */ | |
179 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
180 | p.family = AF_INET; | |
181 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
182 | p.prefix = nexthop->gate.ipv4; | |
183 | ||
184 | rn = route_node_match (table, (struct prefix *) &p); | |
185 | if (!rn) | |
186 | return 0; | |
187 | ||
188 | route_unlock_node (rn); | |
189 | ||
190 | /* Locate a valid connected route. */ | |
191 | RNODE_FOREACH_RIB (rn, match) | |
192 | { | |
88d88a9c RW |
193 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED) || |
194 | !CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
195 | continue; | |
196 | ||
197 | for (match_nh = match->nexthop; match_nh; match_nh = match_nh->next) | |
198 | { | |
199 | if (match->type == ZEBRA_ROUTE_CONNECT || | |
200 | nexthop->ifindex == match_nh->ifindex) | |
201 | { | |
202 | nexthop->ifindex = match_nh->ifindex; | |
203 | return 1; | |
204 | } | |
205 | } | |
40c7bdb0 | 206 | } |
207 | ||
88d88a9c | 208 | return 0; |
40c7bdb0 | 209 | } |
210 | ||
211 | ||
212 | /* | |
213 | * Check if an IPv6 nexthop for a NHLFE is active. Update nexthop based on | |
214 | * the passed flag. | |
215 | * NOTE: Looking only for connected routes right now. | |
216 | */ | |
217 | static int | |
218 | nhlfe_nexthop_active_ipv6 (zebra_nhlfe_t *nhlfe, struct nexthop *nexthop) | |
219 | { | |
220 | struct route_table *table; | |
221 | struct prefix_ipv6 p; | |
222 | struct route_node *rn; | |
223 | struct rib *match; | |
224 | ||
225 | table = zebra_vrf_table (AFI_IP6, SAFI_UNICAST, VRF_DEFAULT); | |
226 | if (!table) | |
227 | return 0; | |
228 | ||
229 | /* Lookup nexthop in IPv6 routing table. */ | |
230 | memset (&p, 0, sizeof (struct prefix_ipv6)); | |
231 | p.family = AF_INET6; | |
232 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
233 | p.prefix = nexthop->gate.ipv6; | |
234 | ||
235 | rn = route_node_match (table, (struct prefix *) &p); | |
236 | if (!rn) | |
237 | return 0; | |
238 | ||
239 | route_unlock_node (rn); | |
240 | ||
241 | /* Locate a valid connected route. */ | |
242 | RNODE_FOREACH_RIB (rn, match) | |
243 | { | |
244 | if ((match->type == ZEBRA_ROUTE_CONNECT) && | |
245 | !CHECK_FLAG (match->status, RIB_ENTRY_REMOVED) && | |
246 | CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
247 | break; | |
248 | } | |
249 | ||
250 | if (!match || !match->nexthop) | |
251 | return 0; | |
252 | ||
253 | nexthop->ifindex = match->nexthop->ifindex; | |
254 | return 1; | |
255 | } | |
256 | ||
257 | ||
258 | /* | |
259 | * Check the nexthop reachability for a NHLFE and return if valid (reachable) | |
260 | * or not. | |
261 | * NOTE: Each NHLFE points to only 1 nexthop. | |
262 | */ | |
263 | static int | |
264 | nhlfe_nexthop_active (zebra_nhlfe_t *nhlfe) | |
265 | { | |
266 | struct nexthop *nexthop; | |
267 | struct interface *ifp; | |
268 | ||
269 | nexthop = nhlfe->nexthop; | |
270 | if (!nexthop) // unexpected | |
271 | return 0; | |
272 | ||
273 | /* Check on nexthop based on type. */ | |
274 | switch (nexthop->type) | |
275 | { | |
276 | case NEXTHOP_TYPE_IPV4: | |
88d88a9c | 277 | case NEXTHOP_TYPE_IPV4_IFINDEX: |
40c7bdb0 | 278 | if (nhlfe_nexthop_active_ipv4 (nhlfe, nexthop)) |
279 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
280 | else | |
281 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
282 | break; | |
283 | ||
284 | case NEXTHOP_TYPE_IPV6: | |
285 | if (nhlfe_nexthop_active_ipv6 (nhlfe, nexthop)) | |
286 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
287 | else | |
288 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
289 | break; | |
290 | ||
291 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
292 | if (IN6_IS_ADDR_LINKLOCAL (&nexthop->gate.ipv6)) | |
293 | { | |
294 | ifp = if_lookup_by_index (nexthop->ifindex); | |
295 | if (ifp && if_is_operative(ifp)) | |
296 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
297 | else | |
298 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
299 | } | |
300 | else | |
301 | { | |
302 | if (nhlfe_nexthop_active_ipv6 (nhlfe, nexthop)) | |
303 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
304 | else | |
305 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
306 | } | |
307 | break; | |
308 | ||
309 | default: | |
310 | break; | |
311 | } | |
312 | ||
313 | return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
314 | } | |
315 | ||
316 | /* | |
317 | * Walk through NHLFEs for a LSP forwarding entry, verify nexthop | |
318 | * reachability and select the best. Multipath entries are also | |
319 | * marked. This is invoked when an LSP scheduled for processing (due | |
320 | * to some change) is examined. | |
321 | */ | |
322 | static void | |
323 | lsp_select_best_nhlfe (zebra_lsp_t *lsp) | |
324 | { | |
325 | zebra_nhlfe_t *nhlfe; | |
326 | zebra_nhlfe_t *best; | |
327 | struct nexthop *nexthop; | |
328 | int changed = 0; | |
329 | ||
330 | if (!lsp) | |
331 | return; | |
332 | ||
333 | best = NULL; | |
334 | lsp->num_ecmp = 0; | |
335 | UNSET_FLAG (lsp->flags, LSP_FLAG_CHANGED); | |
336 | ||
337 | /* | |
338 | * First compute the best path, after checking nexthop status. We are only | |
339 | * concerned with non-deleted NHLFEs. | |
340 | */ | |
341 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) | |
342 | { | |
343 | /* Clear selection flags. */ | |
344 | UNSET_FLAG (nhlfe->flags, | |
345 | (NHLFE_FLAG_SELECTED | NHLFE_FLAG_MULTIPATH)); | |
346 | ||
347 | if (!CHECK_FLAG (nhlfe->flags, NHLFE_FLAG_DELETED) && | |
348 | nhlfe_nexthop_active (nhlfe)) | |
349 | { | |
350 | if (!best || (nhlfe->distance < best->distance)) | |
351 | best = nhlfe; | |
352 | } | |
353 | } | |
354 | ||
355 | lsp->best_nhlfe = best; | |
356 | if (!lsp->best_nhlfe) | |
357 | return; | |
358 | ||
359 | /* Mark best NHLFE as selected. */ | |
360 | SET_FLAG (lsp->best_nhlfe->flags, NHLFE_FLAG_SELECTED); | |
361 | ||
362 | /* | |
363 | * If best path exists, see if there is ECMP. While doing this, note if a | |
364 | * new (uninstalled) NHLFE has been selected, an installed entry that is | |
365 | * still selected has a change or an installed entry is to be removed. | |
366 | */ | |
367 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) | |
368 | { | |
369 | int nh_chg, nh_sel, nh_inst; | |
370 | ||
371 | nexthop = nhlfe->nexthop; | |
372 | if (!nexthop) // unexpected | |
373 | continue; | |
374 | ||
375 | if (!CHECK_FLAG (nhlfe->flags, NHLFE_FLAG_DELETED) && | |
376 | CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE) && | |
377 | (nhlfe->distance == lsp->best_nhlfe->distance)) | |
378 | { | |
379 | SET_FLAG (nhlfe->flags, NHLFE_FLAG_SELECTED); | |
380 | SET_FLAG (nhlfe->flags, NHLFE_FLAG_MULTIPATH); | |
381 | lsp->num_ecmp++; | |
382 | } | |
383 | ||
384 | if (CHECK_FLAG (lsp->flags, LSP_FLAG_INSTALLED) && | |
385 | !changed) | |
386 | { | |
387 | nh_chg = CHECK_FLAG (nhlfe->flags, NHLFE_FLAG_CHANGED); | |
388 | nh_sel = CHECK_FLAG (nhlfe->flags, NHLFE_FLAG_SELECTED); | |
389 | nh_inst = CHECK_FLAG (nhlfe->flags, NHLFE_FLAG_INSTALLED); | |
390 | ||
391 | if ((nh_sel && !nh_inst) || | |
392 | (nh_sel && nh_inst && nh_chg) || | |
393 | (nh_inst && !nh_sel)) | |
394 | changed = 1; | |
395 | } | |
396 | ||
397 | /* We have finished examining, clear changed flag. */ | |
398 | UNSET_FLAG (nhlfe->flags, NHLFE_FLAG_CHANGED); | |
399 | } | |
400 | ||
401 | if (changed) | |
402 | SET_FLAG (lsp->flags, LSP_FLAG_CHANGED); | |
403 | } | |
404 | ||
405 | /* | |
406 | * Delete LSP forwarding entry from kernel, if installed. Called upon | |
407 | * process exit. | |
408 | */ | |
409 | static void | |
410 | lsp_uninstall_from_kernel (struct hash_backet *backet, void *ctxt) | |
411 | { | |
412 | zebra_lsp_t *lsp; | |
413 | ||
414 | lsp = (zebra_lsp_t *) backet->data; | |
415 | if (CHECK_FLAG(lsp->flags, LSP_FLAG_INSTALLED)) | |
416 | kernel_del_lsp (lsp); | |
417 | } | |
418 | ||
419 | /* | |
420 | * Schedule LSP forwarding entry for processing. Called upon changes | |
421 | * that may impact LSPs such as nexthop / connected route changes. | |
422 | */ | |
423 | static void | |
424 | lsp_schedule (struct hash_backet *backet, void *ctxt) | |
425 | { | |
426 | zebra_lsp_t *lsp; | |
427 | ||
428 | lsp = (zebra_lsp_t *) backet->data; | |
429 | lsp_processq_add (lsp); | |
430 | } | |
431 | ||
432 | /* | |
433 | * Process a LSP entry that is in the queue. Recalculate best NHLFE and | |
434 | * any multipaths and update or delete from the kernel, as needed. | |
435 | */ | |
436 | static wq_item_status | |
437 | lsp_process (struct work_queue *wq, void *data) | |
438 | { | |
439 | zebra_lsp_t *lsp; | |
440 | zebra_nhlfe_t *oldbest, *newbest; | |
441 | char buf[BUFSIZ], buf2[BUFSIZ]; | |
442 | ||
443 | lsp = (zebra_lsp_t *)data; | |
444 | if (!lsp) // unexpected | |
445 | return WQ_SUCCESS; | |
446 | ||
447 | oldbest = lsp->best_nhlfe; | |
448 | ||
449 | /* Select best NHLFE(s) */ | |
450 | lsp_select_best_nhlfe (lsp); | |
451 | ||
452 | newbest = lsp->best_nhlfe; | |
453 | ||
454 | if (IS_ZEBRA_DEBUG_MPLS) | |
455 | { | |
456 | if (oldbest) | |
457 | nhlfe2str (oldbest, buf, BUFSIZ); | |
458 | if (newbest) | |
459 | nhlfe2str (newbest, buf2, BUFSIZ); | |
460 | zlog_debug ("Process LSP in-label %u oldbest %s newbest %s " | |
461 | "flags 0x%x ecmp# %d", | |
462 | lsp->ile.in_label, oldbest ? buf : "NULL", | |
463 | newbest ? buf2 : "NULL", lsp->flags, lsp->num_ecmp); | |
464 | } | |
465 | ||
466 | if (!CHECK_FLAG (lsp->flags, LSP_FLAG_INSTALLED)) | |
467 | { | |
468 | /* Not already installed */ | |
469 | if (newbest) | |
470 | kernel_add_lsp (lsp); | |
471 | } | |
472 | else | |
473 | { | |
474 | /* Installed, may need an update and/or delete. */ | |
475 | if (!newbest) | |
476 | kernel_del_lsp (lsp); | |
477 | else if (CHECK_FLAG (lsp->flags, LSP_FLAG_CHANGED)) | |
478 | kernel_upd_lsp (lsp); | |
479 | } | |
480 | ||
481 | return WQ_SUCCESS; | |
482 | } | |
483 | ||
484 | ||
485 | /* | |
486 | * Callback upon processing completion of a LSP forwarding entry. | |
487 | */ | |
488 | static void | |
489 | lsp_processq_del (struct work_queue *wq, void *data) | |
490 | { | |
491 | struct zebra_vrf *zvrf; | |
492 | zebra_lsp_t *lsp; | |
493 | struct hash *lsp_table; | |
494 | zebra_nhlfe_t *nhlfe, *nhlfe_next; | |
495 | ||
496 | zvrf = vrf_info_lookup(VRF_DEFAULT); | |
497 | assert (zvrf); | |
498 | ||
499 | lsp_table = zvrf->lsp_table; | |
500 | if (!lsp_table) // unexpected | |
501 | return; | |
502 | ||
503 | lsp = (zebra_lsp_t *)data; | |
504 | if (!lsp) // unexpected | |
505 | return; | |
506 | ||
507 | /* Clear flag, remove any NHLFEs marked for deletion. If no NHLFEs exist, | |
508 | * delete LSP entry also. | |
509 | */ | |
510 | UNSET_FLAG (lsp->flags, LSP_FLAG_SCHEDULED); | |
511 | ||
512 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe_next) | |
513 | { | |
514 | nhlfe_next = nhlfe->next; | |
515 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_DELETED)) | |
516 | nhlfe_del (nhlfe); | |
517 | } | |
518 | ||
519 | if (!lsp->nhlfe_list) | |
520 | { | |
521 | if (IS_ZEBRA_DEBUG_MPLS) | |
522 | zlog_debug ("Free LSP in-label %u flags 0x%x", | |
523 | lsp->ile.in_label, lsp->flags); | |
524 | ||
525 | lsp = hash_release(lsp_table, &lsp->ile); | |
526 | if (lsp) | |
527 | XFREE(MTYPE_LSP, lsp); | |
528 | } | |
529 | } | |
530 | ||
531 | /* | |
532 | * Callback upon finishing the processing of all scheduled | |
533 | * LSP forwarding entries. | |
534 | */ | |
535 | static void | |
536 | lsp_processq_complete (struct work_queue *wq) | |
537 | { | |
538 | /* Nothing to do for now. */ | |
539 | } | |
540 | ||
541 | /* | |
542 | * Add LSP forwarding entry to queue for subsequent processing. | |
543 | */ | |
544 | static int | |
545 | lsp_processq_add (zebra_lsp_t *lsp) | |
546 | { | |
547 | /* If already scheduled, exit. */ | |
548 | if (CHECK_FLAG (lsp->flags, LSP_FLAG_SCHEDULED)) | |
549 | return 0; | |
550 | ||
551 | work_queue_add (zebrad.lsp_process_q, lsp); | |
552 | SET_FLAG (lsp->flags, LSP_FLAG_SCHEDULED); | |
553 | return 0; | |
554 | } | |
555 | ||
556 | /* | |
557 | * Callback to allocate LSP forwarding table entry. | |
558 | */ | |
559 | static void * | |
560 | lsp_alloc (void *p) | |
561 | { | |
562 | const zebra_ile_t *ile = p; | |
563 | zebra_lsp_t *lsp; | |
564 | ||
565 | lsp = XCALLOC (MTYPE_LSP, sizeof(zebra_lsp_t)); | |
566 | lsp->ile = *ile; | |
567 | ||
568 | if (IS_ZEBRA_DEBUG_MPLS) | |
569 | zlog_debug ("Alloc LSP in-label %u", lsp->ile.in_label); | |
570 | ||
571 | return ((void *)lsp); | |
572 | } | |
573 | ||
574 | /* | |
575 | * Create printable string for NHLFE entry. | |
576 | */ | |
577 | static char * | |
578 | nhlfe2str (zebra_nhlfe_t *nhlfe, char *buf, int size) | |
579 | { | |
580 | struct nexthop *nexthop; | |
581 | ||
582 | buf[0] = '\0'; | |
583 | nexthop = nhlfe->nexthop; | |
584 | switch (nexthop->type) | |
585 | { | |
586 | case NEXTHOP_TYPE_IPV4: | |
88d88a9c | 587 | case NEXTHOP_TYPE_IPV4_IFINDEX: |
40c7bdb0 | 588 | inet_ntop (AF_INET, &nexthop->gate.ipv4, buf, size); |
589 | break; | |
590 | case NEXTHOP_TYPE_IPV6: | |
591 | inet_ntop (AF_INET6, &nexthop->gate.ipv6, buf, size); | |
592 | break; | |
593 | default: | |
594 | break; | |
595 | } | |
596 | ||
597 | return buf; | |
598 | } | |
599 | ||
600 | /* | |
601 | * Check if NHLFE matches with search info passed. | |
602 | */ | |
603 | static int | |
604 | nhlfe_nhop_match (zebra_nhlfe_t *nhlfe, enum nexthop_types_t gtype, | |
605 | union g_addr *gate, char *ifname, ifindex_t ifindex) | |
606 | { | |
607 | struct nexthop *nhop; | |
ea6bebb8 | 608 | int cmp = 1; |
40c7bdb0 | 609 | |
610 | nhop = nhlfe->nexthop; | |
611 | if (!nhop) | |
ea6bebb8 | 612 | return 1; |
40c7bdb0 | 613 | |
614 | if (nhop->type != gtype) | |
ea6bebb8 | 615 | return 1; |
40c7bdb0 | 616 | |
617 | switch (nhop->type) | |
618 | { | |
619 | case NEXTHOP_TYPE_IPV4: | |
88d88a9c | 620 | case NEXTHOP_TYPE_IPV4_IFINDEX: |
40c7bdb0 | 621 | cmp = memcmp(&(nhop->gate.ipv4), &(gate->ipv4), |
ea6bebb8 | 622 | sizeof(struct in_addr)); |
88d88a9c RW |
623 | if (!cmp && nhop->type == NEXTHOP_TYPE_IPV4_IFINDEX) |
624 | cmp = !(nhop->ifindex == ifindex); | |
40c7bdb0 | 625 | break; |
626 | case NEXTHOP_TYPE_IPV6: | |
627 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
628 | cmp = memcmp(&(nhop->gate.ipv6), &(gate->ipv6), | |
629 | sizeof(struct in6_addr)); | |
630 | if (!cmp && nhop->type == NEXTHOP_TYPE_IPV6_IFINDEX) | |
631 | cmp = !(nhop->ifindex == ifindex); | |
632 | break; | |
633 | default: | |
634 | break; | |
635 | } | |
636 | ||
637 | return cmp; | |
638 | } | |
639 | ||
640 | ||
641 | /* | |
642 | * Locate NHLFE that matches with passed info. | |
643 | */ | |
644 | static zebra_nhlfe_t * | |
645 | nhlfe_find (zebra_lsp_t *lsp, enum lsp_types_t lsp_type, | |
646 | enum nexthop_types_t gtype, union g_addr *gate, | |
647 | char *ifname, ifindex_t ifindex) | |
648 | { | |
649 | zebra_nhlfe_t *nhlfe; | |
650 | ||
651 | if (!lsp) | |
652 | return NULL; | |
653 | ||
654 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) | |
655 | { | |
656 | if (nhlfe->type != lsp_type) | |
657 | continue; | |
658 | if (!nhlfe_nhop_match (nhlfe, gtype, gate, ifname, ifindex)) | |
659 | break; | |
660 | } | |
661 | ||
662 | return nhlfe; | |
663 | } | |
664 | ||
665 | /* | |
666 | * Add NHLFE. Base entry must have been created and duplicate | |
667 | * check done. | |
668 | */ | |
669 | static zebra_nhlfe_t * | |
670 | nhlfe_add (zebra_lsp_t *lsp, enum lsp_types_t lsp_type, | |
671 | enum nexthop_types_t gtype, union g_addr *gate, | |
672 | char *ifname, ifindex_t ifindex, mpls_label_t out_label) | |
673 | { | |
674 | zebra_nhlfe_t *nhlfe; | |
675 | struct nexthop *nexthop; | |
676 | ||
677 | if (!lsp) | |
678 | return NULL; | |
679 | ||
680 | nhlfe = XCALLOC(MTYPE_NHLFE, sizeof(zebra_nhlfe_t)); | |
681 | if (!nhlfe) | |
682 | return NULL; | |
683 | ||
684 | nhlfe->lsp = lsp; | |
685 | nhlfe->type = lsp_type; | |
686 | nhlfe->distance = lsp_distance (lsp_type); | |
687 | ||
688 | nexthop = nexthop_new(); | |
689 | if (!nexthop) | |
690 | { | |
691 | XFREE (MTYPE_NHLFE, nhlfe); | |
692 | return NULL; | |
693 | } | |
ce549947 | 694 | nexthop_add_labels (nexthop, lsp_type, 1, &out_label); |
40c7bdb0 | 695 | |
696 | nexthop->type = gtype; | |
697 | switch (nexthop->type) | |
698 | { | |
699 | case NEXTHOP_TYPE_IPV4: | |
88d88a9c | 700 | case NEXTHOP_TYPE_IPV4_IFINDEX: |
40c7bdb0 | 701 | nexthop->gate.ipv4 = gate->ipv4; |
88d88a9c RW |
702 | if (ifindex) |
703 | nexthop->ifindex = ifindex; | |
40c7bdb0 | 704 | break; |
705 | case NEXTHOP_TYPE_IPV6: | |
706 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
707 | nexthop->gate.ipv6 = gate->ipv6; | |
708 | if (ifindex) | |
709 | nexthop->ifindex = ifindex; | |
710 | break; | |
711 | default: | |
712 | nexthop_free(nexthop); | |
713 | XFREE (MTYPE_NHLFE, nhlfe); | |
714 | return NULL; | |
715 | break; | |
716 | } | |
717 | ||
718 | nhlfe->nexthop = nexthop; | |
719 | if (lsp->nhlfe_list) | |
720 | lsp->nhlfe_list->prev = nhlfe; | |
721 | nhlfe->next = lsp->nhlfe_list; | |
722 | lsp->nhlfe_list = nhlfe; | |
723 | ||
724 | return nhlfe; | |
725 | } | |
726 | ||
727 | /* | |
728 | * Delete NHLFE. Entry must be present on list. | |
729 | */ | |
730 | static int | |
731 | nhlfe_del (zebra_nhlfe_t *nhlfe) | |
732 | { | |
733 | zebra_lsp_t *lsp; | |
734 | ||
735 | if (!nhlfe) | |
736 | return -1; | |
737 | ||
738 | lsp = nhlfe->lsp; | |
739 | if (!lsp) | |
740 | return -1; | |
741 | ||
742 | /* Free nexthop. */ | |
743 | if (nhlfe->nexthop) | |
744 | nexthop_free(nhlfe->nexthop); | |
745 | ||
746 | /* Unlink from LSP */ | |
747 | if (nhlfe->next) | |
748 | nhlfe->next->prev = nhlfe->prev; | |
749 | if (nhlfe->prev) | |
750 | nhlfe->prev->next = nhlfe->next; | |
751 | else | |
752 | lsp->nhlfe_list = nhlfe->next; | |
753 | ||
bb49a121 FR |
754 | if (nhlfe == lsp->best_nhlfe) |
755 | lsp->best_nhlfe = NULL; | |
756 | ||
40c7bdb0 | 757 | XFREE (MTYPE_NHLFE, nhlfe); |
758 | ||
759 | return 0; | |
760 | } | |
761 | ||
40c7bdb0 | 762 | static int |
ce549947 RW |
763 | mpls_lsp_uninstall_all (struct hash *lsp_table, zebra_lsp_t *lsp, |
764 | enum lsp_types_t type) | |
40c7bdb0 | 765 | { |
40c7bdb0 | 766 | zebra_nhlfe_t *nhlfe, *nhlfe_next; |
767 | int schedule_lsp = 0; | |
768 | char buf[BUFSIZ]; | |
769 | ||
40c7bdb0 | 770 | /* Mark NHLFEs for delete or directly delete, as appropriate. */ |
771 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe_next) | |
772 | { | |
773 | nhlfe_next = nhlfe->next; | |
774 | ||
775 | /* Skip non-static NHLFEs */ | |
ce549947 | 776 | if (nhlfe->type != type) |
40c7bdb0 | 777 | continue; |
778 | ||
779 | if (IS_ZEBRA_DEBUG_MPLS) | |
780 | { | |
781 | nhlfe2str (nhlfe, buf, BUFSIZ); | |
782 | zlog_debug ("Del LSP in-label %u type %d nexthop %s flags 0x%x", | |
ce549947 | 783 | lsp->ile.in_label, type, buf, nhlfe->flags); |
40c7bdb0 | 784 | } |
785 | ||
786 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED)) | |
787 | { | |
788 | UNSET_FLAG (nhlfe->flags, NHLFE_FLAG_CHANGED); | |
789 | SET_FLAG (nhlfe->flags, NHLFE_FLAG_DELETED); | |
790 | schedule_lsp = 1; | |
791 | } | |
792 | else | |
793 | { | |
794 | nhlfe_del (nhlfe); | |
795 | } | |
796 | } | |
797 | ||
798 | /* Queue LSP for processing, if needed, else delete. */ | |
799 | if (schedule_lsp) | |
800 | { | |
801 | if (lsp_processq_add (lsp)) | |
802 | return -1; | |
803 | } | |
804 | else if (!lsp->nhlfe_list && | |
805 | !CHECK_FLAG (lsp->flags, LSP_FLAG_SCHEDULED)) | |
806 | { | |
807 | if (IS_ZEBRA_DEBUG_MPLS) | |
808 | zlog_debug ("Free LSP in-label %u flags 0x%x", | |
809 | lsp->ile.in_label, lsp->flags); | |
810 | ||
811 | lsp = hash_release(lsp_table, &lsp->ile); | |
812 | if (lsp) | |
813 | XFREE(MTYPE_LSP, lsp); | |
814 | } | |
815 | ||
816 | return 0; | |
817 | } | |
818 | ||
ce549947 RW |
819 | /* |
820 | * Uninstall all static NHLFEs for a particular LSP forwarding entry. | |
821 | * If no other NHLFEs exist, the entry would be deleted. | |
822 | */ | |
823 | static int | |
824 | mpls_static_lsp_uninstall_all (struct zebra_vrf *zvrf, mpls_label_t in_label) | |
825 | { | |
826 | struct hash *lsp_table; | |
827 | zebra_ile_t tmp_ile; | |
828 | zebra_lsp_t *lsp; | |
829 | ||
830 | /* Lookup table. */ | |
831 | lsp_table = zvrf->lsp_table; | |
832 | if (!lsp_table) | |
833 | return -1; | |
834 | ||
835 | /* If entry is not present, exit. */ | |
836 | tmp_ile.in_label = in_label; | |
837 | lsp = hash_lookup (lsp_table, &tmp_ile); | |
838 | if (!lsp || !lsp->nhlfe_list) | |
839 | return 0; | |
840 | ||
841 | return mpls_lsp_uninstall_all (lsp_table, lsp, ZEBRA_LSP_STATIC); | |
842 | } | |
843 | ||
b78b820d | 844 | static json_object * |
845 | nhlfe_json (zebra_nhlfe_t *nhlfe) | |
846 | { | |
847 | char buf[BUFSIZ]; | |
848 | json_object *json_nhlfe = NULL; | |
849 | struct nexthop *nexthop = nhlfe->nexthop; | |
850 | ||
851 | json_nhlfe = json_object_new_object(); | |
852 | json_object_string_add(json_nhlfe, "type", nhlfe_type2str(nhlfe->type)); | |
853 | json_object_int_add(json_nhlfe, "outLabel", nexthop->nh_label->label[0]); | |
854 | json_object_int_add(json_nhlfe, "distance", nhlfe->distance); | |
855 | ||
856 | if (CHECK_FLAG (nhlfe->flags, NHLFE_FLAG_INSTALLED)) | |
857 | json_object_boolean_true_add(json_nhlfe, "installed"); | |
858 | ||
859 | switch (nexthop->type) | |
860 | { | |
861 | case NEXTHOP_TYPE_IPV4: | |
88d88a9c | 862 | case NEXTHOP_TYPE_IPV4_IFINDEX: |
b78b820d | 863 | json_object_string_add(json_nhlfe, "nexthop", |
864 | inet_ntoa (nexthop->gate.ipv4)); | |
865 | break; | |
866 | case NEXTHOP_TYPE_IPV6: | |
867 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
868 | json_object_string_add(json_nhlfe, "nexthop", | |
869 | inet_ntop (AF_INET6, &nexthop->gate.ipv6, buf, BUFSIZ)); | |
870 | ||
871 | if (nexthop->ifindex) | |
872 | json_object_string_add(json_nhlfe, "interface", ifindex2ifname (nexthop->ifindex)); | |
873 | break; | |
874 | default: | |
875 | break; | |
876 | } | |
877 | return json_nhlfe; | |
878 | } | |
879 | ||
3ab18ff2 | 880 | /* |
881 | * Print the NHLFE for a LSP forwarding entry. | |
882 | */ | |
883 | static void | |
884 | nhlfe_print (zebra_nhlfe_t *nhlfe, struct vty *vty) | |
885 | { | |
886 | struct nexthop *nexthop; | |
887 | char buf[BUFSIZ]; | |
888 | ||
889 | nexthop = nhlfe->nexthop; | |
890 | if (!nexthop || !nexthop->nh_label) // unexpected | |
891 | return; | |
892 | ||
893 | vty_out(vty, " type: %s remote label: %s distance: %d%s", | |
894 | nhlfe_type2str(nhlfe->type), | |
895 | label2str(nexthop->nh_label->label[0], buf, BUFSIZ), | |
896 | nhlfe->distance, VTY_NEWLINE); | |
897 | switch (nexthop->type) | |
898 | { | |
899 | case NEXTHOP_TYPE_IPV4: | |
88d88a9c | 900 | case NEXTHOP_TYPE_IPV4_IFINDEX: |
3ab18ff2 | 901 | vty_out (vty, " via %s", inet_ntoa (nexthop->gate.ipv4)); |
88d88a9c RW |
902 | if (nexthop->ifindex) |
903 | vty_out (vty, " dev %s", ifindex2ifname (nexthop->ifindex)); | |
3ab18ff2 | 904 | break; |
905 | case NEXTHOP_TYPE_IPV6: | |
906 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
907 | vty_out (vty, " via %s", | |
b78b820d | 908 | inet_ntop (AF_INET6, &nexthop->gate.ipv6, buf, BUFSIZ)); |
3ab18ff2 | 909 | if (nexthop->ifindex) |
910 | vty_out (vty, " dev %s", ifindex2ifname (nexthop->ifindex)); | |
911 | break; | |
912 | default: | |
913 | break; | |
914 | } | |
915 | vty_out(vty, "%s", CHECK_FLAG (nhlfe->flags, NHLFE_FLAG_INSTALLED) ? | |
916 | " (installed)" : ""); | |
917 | vty_out(vty, "%s", VTY_NEWLINE); | |
918 | } | |
919 | ||
920 | /* | |
921 | * Print an LSP forwarding entry. | |
922 | */ | |
923 | static void | |
924 | lsp_print (zebra_lsp_t *lsp, void *ctxt) | |
925 | { | |
926 | zebra_nhlfe_t *nhlfe; | |
927 | struct vty *vty; | |
928 | ||
929 | vty = (struct vty *) ctxt; | |
930 | ||
931 | vty_out(vty, "Local label: %u%s%s", | |
932 | lsp->ile.in_label, | |
933 | CHECK_FLAG (lsp->flags, LSP_FLAG_INSTALLED) ? " (installed)" : "", | |
934 | VTY_NEWLINE); | |
935 | ||
936 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) | |
937 | nhlfe_print (nhlfe, vty); | |
938 | } | |
939 | ||
940 | /* | |
b78b820d | 941 | * JSON objects for an LSP forwarding entry. |
3ab18ff2 | 942 | */ |
b78b820d | 943 | static json_object * |
944 | lsp_json (zebra_lsp_t *lsp) | |
3ab18ff2 | 945 | { |
b78b820d | 946 | zebra_nhlfe_t *nhlfe = NULL; |
947 | json_object *json = json_object_new_object(); | |
948 | json_object *json_nhlfe_list = json_object_new_array(); | |
3ab18ff2 | 949 | |
b78b820d | 950 | json_object_int_add(json, "inLabel", lsp->ile.in_label); |
951 | ||
952 | if (CHECK_FLAG (lsp->flags, LSP_FLAG_INSTALLED)) | |
953 | json_object_boolean_true_add(json, "installed"); | |
3ab18ff2 | 954 | |
b78b820d | 955 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) |
956 | json_object_array_add(json_nhlfe_list, nhlfe_json(nhlfe)); | |
957 | ||
958 | json_object_object_add(json, "nexthops", json_nhlfe_list); | |
959 | return json; | |
960 | } | |
961 | ||
962 | ||
963 | /* Return a sorted linked list of the hash contents */ | |
964 | static struct list * | |
965 | hash_get_sorted_list (struct hash *hash, void *cmp) | |
966 | { | |
967 | unsigned int i; | |
968 | struct hash_backet *hb; | |
969 | struct list *sorted_list = list_new(); | |
970 | ||
971 | sorted_list->cmp = (int (*)(void *, void *)) cmp; | |
972 | ||
973 | for (i = 0; i < hash->size; i++) | |
974 | for (hb = hash->index[i]; hb; hb = hb->next) | |
975 | listnode_add_sort(sorted_list, hb->data); | |
976 | ||
977 | return sorted_list; | |
3ab18ff2 | 978 | } |
979 | ||
7758e3f3 | 980 | /* |
b78b820d | 981 | * Compare two LSPs based on their label values. |
7758e3f3 | 982 | */ |
b78b820d | 983 | static int |
984 | lsp_cmp (zebra_lsp_t *lsp1, zebra_lsp_t *lsp2) | |
7758e3f3 | 985 | { |
b78b820d | 986 | if (lsp1->ile.in_label < lsp2->ile.in_label) |
987 | return -1; | |
7758e3f3 | 988 | |
b78b820d | 989 | if (lsp1->ile.in_label > lsp2->ile.in_label) |
990 | return 1; | |
7758e3f3 | 991 | |
b78b820d | 992 | return 0; |
7758e3f3 | 993 | } |
994 | ||
995 | /* | |
996 | * Callback to allocate static LSP. | |
997 | */ | |
998 | static void * | |
999 | slsp_alloc (void *p) | |
1000 | { | |
1001 | const zebra_ile_t *ile = p; | |
1002 | zebra_slsp_t *slsp; | |
1003 | ||
1004 | slsp = XCALLOC (MTYPE_SLSP, sizeof(zebra_slsp_t)); | |
1005 | slsp->ile = *ile; | |
1006 | return ((void *)slsp); | |
1007 | } | |
1008 | ||
b78b820d | 1009 | /* |
1010 | * Compare two static LSPs based on their label values. | |
1011 | */ | |
1012 | static int | |
1013 | slsp_cmp (zebra_slsp_t *slsp1, zebra_slsp_t *slsp2) | |
1014 | { | |
1015 | if (slsp1->ile.in_label < slsp2->ile.in_label) | |
1016 | return -1; | |
1017 | ||
1018 | if (slsp1->ile.in_label > slsp2->ile.in_label) | |
1019 | return 1; | |
1020 | ||
1021 | return 0; | |
1022 | } | |
1023 | ||
7758e3f3 | 1024 | /* |
1025 | * Check if static NHLFE matches with search info passed. | |
1026 | */ | |
1027 | static int | |
1028 | snhlfe_match (zebra_snhlfe_t *snhlfe, enum nexthop_types_t gtype, | |
1029 | union g_addr *gate, char *ifname, ifindex_t ifindex) | |
1030 | { | |
ea6bebb8 | 1031 | int cmp = 1; |
7758e3f3 | 1032 | |
1033 | if (snhlfe->gtype != gtype) | |
ea6bebb8 | 1034 | return 1; |
7758e3f3 | 1035 | |
1036 | switch (snhlfe->gtype) | |
1037 | { | |
1038 | case NEXTHOP_TYPE_IPV4: | |
1039 | cmp = memcmp(&(snhlfe->gate.ipv4), &(gate->ipv4), | |
1040 | sizeof(struct in_addr)); | |
1041 | break; | |
1042 | case NEXTHOP_TYPE_IPV6: | |
1043 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1044 | cmp = memcmp(&(snhlfe->gate.ipv6), &(gate->ipv6), | |
1045 | sizeof(struct in6_addr)); | |
1046 | if (!cmp && snhlfe->gtype == NEXTHOP_TYPE_IPV6_IFINDEX) | |
1047 | cmp = !(snhlfe->ifindex == ifindex); | |
1048 | break; | |
1049 | default: | |
1050 | break; | |
1051 | } | |
1052 | ||
1053 | return cmp; | |
1054 | } | |
1055 | ||
1056 | /* | |
1057 | * Locate static NHLFE that matches with passed info. | |
1058 | */ | |
1059 | static zebra_snhlfe_t * | |
1060 | snhlfe_find (zebra_slsp_t *slsp, enum nexthop_types_t gtype, | |
1061 | union g_addr *gate, char *ifname, ifindex_t ifindex) | |
1062 | { | |
1063 | zebra_snhlfe_t *snhlfe; | |
1064 | ||
1065 | if (!slsp) | |
1066 | return NULL; | |
1067 | ||
1068 | for (snhlfe = slsp->snhlfe_list; snhlfe; snhlfe = snhlfe->next) | |
1069 | { | |
1070 | if (!snhlfe_match (snhlfe, gtype, gate, ifname, ifindex)) | |
1071 | break; | |
1072 | } | |
1073 | ||
1074 | return snhlfe; | |
1075 | } | |
1076 | ||
1077 | ||
1078 | /* | |
1079 | * Add static NHLFE. Base LSP config entry must have been created | |
1080 | * and duplicate check done. | |
1081 | */ | |
1082 | static zebra_snhlfe_t * | |
1083 | snhlfe_add (zebra_slsp_t *slsp, enum nexthop_types_t gtype, | |
1084 | union g_addr *gate, char *ifname, ifindex_t ifindex, | |
1085 | mpls_label_t out_label) | |
1086 | { | |
1087 | zebra_snhlfe_t *snhlfe; | |
1088 | ||
1089 | if (!slsp) | |
1090 | return NULL; | |
1091 | ||
1092 | snhlfe = XCALLOC(MTYPE_SNHLFE, sizeof(zebra_snhlfe_t)); | |
1093 | snhlfe->slsp = slsp; | |
1094 | snhlfe->out_label = out_label; | |
1095 | snhlfe->gtype = gtype; | |
1096 | switch (gtype) | |
1097 | { | |
1098 | case NEXTHOP_TYPE_IPV4: | |
1099 | snhlfe->gate.ipv4 = gate->ipv4; | |
1100 | break; | |
1101 | case NEXTHOP_TYPE_IPV6: | |
1102 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1103 | snhlfe->gate.ipv6 = gate->ipv6; | |
1104 | if (ifindex) | |
1105 | snhlfe->ifindex = ifindex; | |
1106 | break; | |
1107 | default: | |
1108 | XFREE (MTYPE_SNHLFE, snhlfe); | |
1109 | return NULL; | |
1110 | } | |
1111 | ||
1112 | if (slsp->snhlfe_list) | |
1113 | slsp->snhlfe_list->prev = snhlfe; | |
1114 | snhlfe->next = slsp->snhlfe_list; | |
1115 | slsp->snhlfe_list = snhlfe; | |
1116 | ||
1117 | return snhlfe; | |
1118 | } | |
1119 | ||
1120 | /* | |
1121 | * Delete static NHLFE. Entry must be present on list. | |
1122 | */ | |
1123 | static int | |
1124 | snhlfe_del (zebra_snhlfe_t *snhlfe) | |
1125 | { | |
1126 | zebra_slsp_t *slsp; | |
1127 | ||
1128 | if (!snhlfe) | |
1129 | return -1; | |
1130 | ||
1131 | slsp = snhlfe->slsp; | |
1132 | if (!slsp) | |
1133 | return -1; | |
1134 | ||
1135 | if (snhlfe->next) | |
1136 | snhlfe->next->prev = snhlfe->prev; | |
1137 | if (snhlfe->prev) | |
1138 | snhlfe->prev->next = snhlfe->next; | |
1139 | else | |
1140 | slsp->snhlfe_list = snhlfe->next; | |
1141 | ||
1142 | snhlfe->prev = snhlfe->next = NULL; | |
1143 | if (snhlfe->ifname) | |
1144 | XFREE (MTYPE_SNHLFE_IFNAME, snhlfe->ifname); | |
1145 | XFREE (MTYPE_SNHLFE, snhlfe); | |
1146 | ||
1147 | return 0; | |
1148 | } | |
1149 | ||
1150 | /* | |
1151 | * Delete all static NHLFE entries for this LSP (in label). | |
1152 | */ | |
1153 | static int | |
1154 | snhlfe_del_all (zebra_slsp_t *slsp) | |
1155 | { | |
1156 | zebra_snhlfe_t *snhlfe, *snhlfe_next; | |
1157 | ||
1158 | if (!slsp) | |
1159 | return -1; | |
1160 | ||
1161 | for (snhlfe = slsp->snhlfe_list; snhlfe; snhlfe = snhlfe_next) | |
1162 | { | |
1163 | snhlfe_next = snhlfe->next; | |
1164 | snhlfe_del (snhlfe); | |
1165 | } | |
1166 | ||
1167 | return 0; | |
1168 | } | |
1169 | ||
1170 | /* | |
1171 | * Create printable string for NHLFE configuration. | |
1172 | */ | |
1173 | static char * | |
1174 | snhlfe2str (zebra_snhlfe_t *snhlfe, char *buf, int size) | |
1175 | { | |
1176 | buf[0] = '\0'; | |
1177 | switch (snhlfe->gtype) | |
1178 | { | |
1179 | case NEXTHOP_TYPE_IPV4: | |
1180 | inet_ntop (AF_INET, &snhlfe->gate.ipv4, buf, size); | |
1181 | break; | |
1182 | case NEXTHOP_TYPE_IPV6: | |
1183 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1184 | inet_ntop (AF_INET6, &snhlfe->gate.ipv6, buf, size); | |
1185 | if (snhlfe->ifindex) | |
1186 | strcat (buf, ifindex2ifname (snhlfe->ifindex)); | |
1187 | break; | |
1188 | default: | |
1189 | break; | |
1190 | } | |
1191 | ||
1192 | return buf; | |
1193 | } | |
1194 | ||
40c7bdb0 | 1195 | /* |
1196 | * Initialize work queue for processing changed LSPs. | |
1197 | */ | |
1198 | static void | |
1199 | mpls_processq_init (struct zebra_t *zebra) | |
1200 | { | |
1201 | zebra->lsp_process_q = work_queue_new (zebra->master, "LSP processing"); | |
1202 | if (!zebra->lsp_process_q) | |
1203 | { | |
1204 | zlog_err ("%s: could not initialise work queue!", __func__); | |
1205 | return; | |
1206 | } | |
1207 | ||
1208 | zebra->lsp_process_q->spec.workfunc = &lsp_process; | |
1209 | zebra->lsp_process_q->spec.del_item_data = &lsp_processq_del; | |
1210 | zebra->lsp_process_q->spec.errorfunc = NULL; | |
1211 | zebra->lsp_process_q->spec.completion_func = &lsp_processq_complete; | |
1212 | zebra->lsp_process_q->spec.max_retries = 0; | |
1213 | zebra->lsp_process_q->spec.hold = 10; | |
1214 | } | |
1215 | ||
7758e3f3 | 1216 | |
1217 | ||
1218 | /* Public functions */ | |
1219 | ||
a22f3f5d | 1220 | /* |
1221 | * String to label conversion, labels separated by '/'. | |
1222 | */ | |
1223 | int | |
1224 | mpls_str2label (const char *label_str, u_int8_t *num_labels, | |
1225 | mpls_label_t *labels) | |
1226 | { | |
1227 | char *endp; | |
1228 | int i; | |
1229 | ||
1230 | *num_labels = 0; | |
1231 | for (i = 0; i < MPLS_MAX_LABELS; i++) | |
1232 | { | |
1233 | u_int32_t label; | |
1234 | ||
1235 | label = strtoul(label_str, &endp, 0); | |
1236 | ||
1237 | /* validity checks */ | |
1238 | if (endp == label_str) | |
1239 | return -1; | |
1240 | ||
1241 | if (!IS_MPLS_UNRESERVED_LABEL(label)) | |
1242 | return -1; | |
1243 | ||
1244 | labels[i] = label; | |
1245 | if (*endp == '\0') | |
1246 | { | |
1247 | *num_labels = i + 1; | |
1248 | return 0; | |
1249 | } | |
1250 | ||
1251 | /* Check separator. */ | |
1252 | if (*endp != '/') | |
1253 | return -1; | |
1254 | ||
1255 | label_str = endp + 1; | |
1256 | } | |
1257 | ||
1258 | /* Too many labels. */ | |
1259 | return -1; | |
1260 | } | |
1261 | ||
1262 | /* | |
1263 | * Label to string conversion, labels in string separated by '/'. | |
1264 | */ | |
1265 | char * | |
1266 | mpls_label2str (u_int8_t num_labels, mpls_label_t *labels, | |
1267 | char *buf, int len) | |
1268 | { | |
1269 | buf[0] = '\0'; | |
1270 | if (num_labels == 1) | |
1271 | snprintf (buf, len, "%u", labels[0]); | |
1272 | else if (num_labels == 2) | |
1273 | snprintf (buf, len, "%u/%u", labels[0], labels[1]); | |
1274 | return buf; | |
1275 | } | |
1276 | ||
ce549947 RW |
1277 | /* |
1278 | * Install/uninstall a FEC-To-NHLFE (FTN) binding. | |
1279 | */ | |
1280 | int | |
1281 | mpls_ftn_update (int add, struct zebra_vrf *zvrf, enum lsp_types_t type, | |
88d88a9c RW |
1282 | struct prefix *prefix, enum nexthop_types_t gtype, |
1283 | union g_addr *gate, ifindex_t ifindex, u_int8_t distance, | |
ce549947 RW |
1284 | mpls_label_t out_label) |
1285 | { | |
1286 | struct route_table *table; | |
1287 | struct route_node *rn; | |
1288 | struct rib *rib; | |
1289 | struct nexthop *nexthop; | |
1290 | ||
1291 | /* Lookup table. */ | |
661512bf | 1292 | table = zebra_vrf_table (family2afi(prefix->family), SAFI_UNICAST, zvrf_id (zvrf)); |
ce549947 RW |
1293 | if (! table) |
1294 | return -1; | |
1295 | ||
1296 | /* Lookup existing route */ | |
1297 | rn = route_node_get (table, prefix); | |
1298 | RNODE_FOREACH_RIB (rn, rib) | |
1299 | { | |
1300 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
1301 | continue; | |
1302 | if (rib->distance == distance) | |
1303 | break; | |
1304 | } | |
1305 | ||
1306 | if (rib == NULL) | |
1307 | return -1; | |
1308 | ||
1309 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
88d88a9c | 1310 | { |
4312ff1c | 1311 | switch (nexthop->type) |
88d88a9c RW |
1312 | { |
1313 | case NEXTHOP_TYPE_IPV4: | |
1314 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
4312ff1c RW |
1315 | if (gtype != NEXTHOP_TYPE_IPV4 && gtype != NEXTHOP_TYPE_IPV4_IFINDEX) |
1316 | continue; | |
ce549947 RW |
1317 | if (! IPV4_ADDR_SAME (&nexthop->gate.ipv4, &gate->ipv4)) |
1318 | continue; | |
4312ff1c RW |
1319 | if (nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX && |
1320 | nexthop->ifindex != ifindex) | |
ce549947 | 1321 | continue; |
88d88a9c RW |
1322 | goto found; |
1323 | case NEXTHOP_TYPE_IPV6: | |
1324 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
4312ff1c RW |
1325 | if (gtype != NEXTHOP_TYPE_IPV6 && gtype != NEXTHOP_TYPE_IPV6_IFINDEX) |
1326 | continue; | |
ce549947 RW |
1327 | if (! IPV6_ADDR_SAME (&nexthop->gate.ipv6, &gate->ipv6)) |
1328 | continue; | |
4312ff1c RW |
1329 | if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX && |
1330 | nexthop->ifindex != ifindex) | |
88d88a9c | 1331 | continue; |
ce549947 | 1332 | goto found; |
ce549947 RW |
1333 | default: |
1334 | break; | |
88d88a9c RW |
1335 | } |
1336 | } | |
ce549947 RW |
1337 | /* nexthop not found */ |
1338 | return -1; | |
1339 | ||
1340 | found: | |
daca38ae | 1341 | if (add && nexthop->nh_label_type == ZEBRA_LSP_NONE) |
ce549947 | 1342 | nexthop_add_labels (nexthop, type, 1, &out_label); |
daca38ae | 1343 | else if (!add && nexthop->nh_label_type == type) |
ce549947 | 1344 | nexthop_del_labels (nexthop); |
daca38ae RW |
1345 | else |
1346 | return 0; | |
ce549947 RW |
1347 | |
1348 | SET_FLAG (rib->status, RIB_ENTRY_CHANGED); | |
1349 | SET_FLAG (rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); | |
1350 | rib_queue_add (rn); | |
1351 | ||
1352 | return 0; | |
1353 | } | |
1354 | ||
1355 | /* | |
1356 | * Install/update a NHLFE for an LSP in the forwarding table. This may be | |
1357 | * a new LSP entry or a new NHLFE for an existing in-label or an update of | |
1358 | * the out-label for an existing NHLFE (update case). | |
1359 | */ | |
1360 | int | |
1361 | mpls_lsp_install (struct zebra_vrf *zvrf, enum lsp_types_t type, | |
1362 | mpls_label_t in_label, mpls_label_t out_label, | |
1363 | enum nexthop_types_t gtype, union g_addr *gate, | |
1364 | char *ifname, ifindex_t ifindex) | |
1365 | { | |
1366 | struct hash *lsp_table; | |
1367 | zebra_ile_t tmp_ile; | |
1368 | zebra_lsp_t *lsp; | |
1369 | zebra_nhlfe_t *nhlfe; | |
1370 | char buf[BUFSIZ]; | |
1371 | ||
1372 | /* Lookup table. */ | |
1373 | lsp_table = zvrf->lsp_table; | |
1374 | if (!lsp_table) | |
1375 | return -1; | |
1376 | ||
1377 | /* If entry is present, exit. */ | |
1378 | tmp_ile.in_label = in_label; | |
1379 | lsp = hash_get (lsp_table, &tmp_ile, lsp_alloc); | |
1380 | if (!lsp) | |
1381 | return -1; | |
1382 | nhlfe = nhlfe_find (lsp, type, gtype, gate, ifname, ifindex); | |
1383 | if (nhlfe) | |
1384 | { | |
1385 | struct nexthop *nh = nhlfe->nexthop; | |
1386 | ||
1387 | assert (nh); | |
1388 | assert (nh->nh_label); | |
1389 | ||
1390 | /* Clear deleted flag (in case it was set) */ | |
1391 | UNSET_FLAG (nhlfe->flags, NHLFE_FLAG_DELETED); | |
1392 | if (nh->nh_label->label[0] == out_label) | |
1393 | /* No change */ | |
1394 | return 0; | |
1395 | ||
1396 | if (IS_ZEBRA_DEBUG_MPLS) | |
1397 | { | |
1398 | nhlfe2str (nhlfe, buf, BUFSIZ); | |
1399 | zlog_debug ("LSP in-label %u type %d nexthop %s " | |
1400 | "out-label changed to %u (old %u)", | |
1401 | in_label, type, buf, | |
1402 | out_label, nh->nh_label->label[0]); | |
1403 | } | |
1404 | ||
1405 | /* Update out label, trigger processing. */ | |
1406 | nh->nh_label->label[0] = out_label; | |
1407 | } | |
1408 | else | |
1409 | { | |
1410 | /* Add LSP entry to this nexthop */ | |
1411 | nhlfe = nhlfe_add (lsp, type, gtype, gate, | |
1412 | ifname, ifindex, out_label); | |
1413 | if (!nhlfe) | |
1414 | return -1; | |
1415 | ||
1416 | if (IS_ZEBRA_DEBUG_MPLS) | |
1417 | { | |
1418 | nhlfe2str (nhlfe, buf, BUFSIZ); | |
1419 | zlog_debug ("Add LSP in-label %u type %d nexthop %s " | |
1420 | "out-label %u", in_label, type, buf, out_label); | |
1421 | } | |
1422 | ||
1423 | lsp->addr_family = NHLFE_FAMILY (nhlfe); | |
1424 | } | |
1425 | ||
1426 | /* Mark NHLFE, queue LSP for processing. */ | |
1427 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_CHANGED); | |
1428 | if (lsp_processq_add (lsp)) | |
1429 | return -1; | |
1430 | ||
1431 | return 0; | |
1432 | } | |
1433 | ||
1434 | /* | |
1435 | * Uninstall a particular NHLFE in the forwarding table. If this is | |
1436 | * the only NHLFE, the entire LSP forwarding entry has to be deleted. | |
1437 | */ | |
1438 | int | |
1439 | mpls_lsp_uninstall (struct zebra_vrf *zvrf, enum lsp_types_t type, | |
1440 | mpls_label_t in_label, enum nexthop_types_t gtype, | |
1441 | union g_addr *gate, char *ifname, ifindex_t ifindex) | |
1442 | { | |
1443 | struct hash *lsp_table; | |
1444 | zebra_ile_t tmp_ile; | |
1445 | zebra_lsp_t *lsp; | |
1446 | zebra_nhlfe_t *nhlfe; | |
1447 | char buf[BUFSIZ]; | |
1448 | ||
1449 | /* Lookup table. */ | |
1450 | lsp_table = zvrf->lsp_table; | |
1451 | if (!lsp_table) | |
1452 | return -1; | |
1453 | ||
1454 | /* If entry is not present, exit. */ | |
1455 | tmp_ile.in_label = in_label; | |
1456 | lsp = hash_lookup (lsp_table, &tmp_ile); | |
1457 | if (!lsp) | |
1458 | return 0; | |
1459 | nhlfe = nhlfe_find (lsp, type, gtype, gate, ifname, ifindex); | |
1460 | if (!nhlfe) | |
1461 | return 0; | |
1462 | ||
1463 | if (IS_ZEBRA_DEBUG_MPLS) | |
1464 | { | |
1465 | nhlfe2str (nhlfe, buf, BUFSIZ); | |
1466 | zlog_debug ("Del LSP in-label %u type %d nexthop %s flags 0x%x", | |
1467 | in_label, type, buf, nhlfe->flags); | |
1468 | } | |
1469 | ||
1470 | /* Mark NHLFE for delete or directly delete, as appropriate. */ | |
1471 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED)) | |
1472 | { | |
1473 | UNSET_FLAG (nhlfe->flags, NHLFE_FLAG_CHANGED); | |
1474 | SET_FLAG (nhlfe->flags, NHLFE_FLAG_DELETED); | |
1475 | if (lsp_processq_add (lsp)) | |
1476 | return -1; | |
1477 | } | |
1478 | else | |
1479 | { | |
1480 | nhlfe_del (nhlfe); | |
1481 | ||
1482 | /* Free LSP entry if no other NHLFEs and not scheduled. */ | |
1483 | if (!lsp->nhlfe_list && | |
1484 | !CHECK_FLAG (lsp->flags, LSP_FLAG_SCHEDULED)) | |
1485 | { | |
1486 | if (IS_ZEBRA_DEBUG_MPLS) | |
1487 | zlog_debug ("Free LSP in-label %u flags 0x%x", | |
1488 | lsp->ile.in_label, lsp->flags); | |
1489 | ||
1490 | lsp = hash_release(lsp_table, &lsp->ile); | |
1491 | if (lsp) | |
1492 | XFREE(MTYPE_LSP, lsp); | |
1493 | } | |
1494 | } | |
1495 | return 0; | |
1496 | } | |
1497 | ||
1498 | /* | |
1499 | * Uninstall all LDP NHLFEs for a particular LSP forwarding entry. | |
1500 | * If no other NHLFEs exist, the entry would be deleted. | |
1501 | */ | |
1502 | void | |
1503 | mpls_ldp_lsp_uninstall_all (struct hash_backet *backet, void *ctxt) | |
1504 | { | |
1505 | zebra_lsp_t *lsp; | |
1506 | struct hash *lsp_table; | |
1507 | ||
1508 | lsp = (zebra_lsp_t *) backet->data; | |
1509 | if (!lsp || !lsp->nhlfe_list) | |
1510 | return; | |
1511 | ||
1512 | lsp_table = ctxt; | |
1513 | if (!lsp_table) | |
1514 | return; | |
1515 | ||
1516 | mpls_lsp_uninstall_all (lsp_table, lsp, ZEBRA_LSP_LDP); | |
1517 | } | |
1518 | ||
1519 | /* | |
1520 | * Uninstall all LDP FEC-To-NHLFE (FTN) bindings of the given address-family. | |
1521 | */ | |
1522 | void | |
1523 | mpls_ldp_ftn_uninstall_all (struct zebra_vrf *zvrf, int afi) | |
1524 | { | |
1525 | struct route_table *table; | |
1526 | struct route_node *rn; | |
1527 | struct rib *rib; | |
1528 | struct nexthop *nexthop; | |
1529 | int update; | |
1530 | ||
1531 | /* Process routes of interested address-families. */ | |
661512bf | 1532 | table = zebra_vrf_table (afi, SAFI_UNICAST, zvrf_id (zvrf)); |
ce549947 RW |
1533 | if (!table) |
1534 | return; | |
1535 | ||
1536 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
1537 | { | |
1538 | update = 0; | |
1539 | RNODE_FOREACH_RIB (rn, rib) | |
1540 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
1541 | if (nexthop->nh_label_type == ZEBRA_LSP_LDP) | |
1542 | { | |
1543 | nexthop_del_labels (nexthop); | |
1544 | SET_FLAG (rib->status, RIB_ENTRY_CHANGED); | |
1545 | SET_FLAG (rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); | |
1546 | update = 1; | |
1547 | } | |
1548 | ||
1549 | if (update) | |
1550 | rib_queue_add (rn); | |
1551 | } | |
1552 | } | |
1553 | ||
1c1cf002 | 1554 | #if defined(HAVE_CUMULUS) |
7758e3f3 | 1555 | /* |
1556 | * Check that the label values used in LSP creation are consistent. The | |
1557 | * main criteria is that if there is ECMP, the label operation must still | |
1558 | * be consistent - i.e., all paths either do a swap or do PHP. This is due | |
1559 | * to current HW restrictions. | |
1560 | */ | |
1561 | int | |
1562 | zebra_mpls_lsp_label_consistent (struct zebra_vrf *zvrf, mpls_label_t in_label, | |
1563 | mpls_label_t out_label, enum nexthop_types_t gtype, | |
1564 | union g_addr *gate, char *ifname, ifindex_t ifindex) | |
1565 | { | |
1566 | struct hash *slsp_table; | |
1567 | zebra_ile_t tmp_ile; | |
1568 | zebra_slsp_t *slsp; | |
1569 | zebra_snhlfe_t *snhlfe; | |
1570 | ||
1571 | /* Lookup table. */ | |
1572 | slsp_table = zvrf->slsp_table; | |
1573 | if (!slsp_table) | |
1574 | return 0; | |
1575 | ||
1576 | /* If entry is not present, exit. */ | |
1577 | tmp_ile.in_label = in_label; | |
1578 | slsp = hash_lookup (slsp_table, &tmp_ile); | |
1579 | if (!slsp) | |
1580 | return 1; | |
1581 | ||
1582 | snhlfe = snhlfe_find (slsp, gtype, gate, ifname, ifindex); | |
1583 | if (snhlfe) | |
1584 | { | |
1585 | if (snhlfe->out_label == out_label) | |
1586 | return 1; | |
1587 | ||
1588 | /* If not only NHLFE, cannot allow label change. */ | |
1589 | if (snhlfe != slsp->snhlfe_list || | |
1590 | snhlfe->next) | |
1591 | return 0; | |
1592 | } | |
1593 | else | |
1594 | { | |
1595 | /* If other NHLFEs exist, label operation must match. */ | |
1596 | if (slsp->snhlfe_list) | |
1597 | { | |
1598 | int cur_op, new_op; | |
1599 | ||
1600 | cur_op = (slsp->snhlfe_list->out_label == MPLS_IMP_NULL_LABEL); | |
1601 | new_op = (out_label == MPLS_IMP_NULL_LABEL); | |
1602 | if (cur_op != new_op) | |
1603 | return 0; | |
1604 | } | |
1605 | } | |
1606 | ||
1607 | /* Label values are good. */ | |
1608 | return 1; | |
1609 | } | |
1c1cf002 | 1610 | #endif /* HAVE_CUMULUS */ |
7758e3f3 | 1611 | |
1612 | /* | |
1613 | * Add static LSP entry. This may be the first entry for this incoming label | |
1614 | * or an additional nexthop; an existing entry may also have outgoing label | |
1615 | * changed. | |
1616 | * Note: The label operation (swap or PHP) is common for the LSP entry (all | |
1617 | * NHLFEs). | |
1618 | */ | |
1619 | int | |
1620 | zebra_mpls_static_lsp_add (struct zebra_vrf *zvrf, mpls_label_t in_label, | |
1621 | mpls_label_t out_label, enum nexthop_types_t gtype, | |
1622 | union g_addr *gate, char *ifname, ifindex_t ifindex) | |
1623 | { | |
1624 | struct hash *slsp_table; | |
1625 | zebra_ile_t tmp_ile; | |
1626 | zebra_slsp_t *slsp; | |
1627 | zebra_snhlfe_t *snhlfe; | |
1628 | char buf[BUFSIZ]; | |
1629 | ||
1630 | /* Lookup table. */ | |
1631 | slsp_table = zvrf->slsp_table; | |
1632 | if (!slsp_table) | |
1633 | return -1; | |
1634 | ||
1635 | /* If entry is present, exit. */ | |
1636 | tmp_ile.in_label = in_label; | |
1637 | slsp = hash_get (slsp_table, &tmp_ile, slsp_alloc); | |
1638 | if (!slsp) | |
1639 | return -1; | |
1640 | snhlfe = snhlfe_find (slsp, gtype, gate, ifname, ifindex); | |
1641 | if (snhlfe) | |
1642 | { | |
1643 | if (snhlfe->out_label == out_label) | |
1644 | /* No change */ | |
1645 | return 0; | |
1646 | ||
1647 | if (IS_ZEBRA_DEBUG_MPLS) | |
1648 | { | |
1649 | snhlfe2str (snhlfe, buf, BUFSIZ); | |
1650 | zlog_debug ("Upd static LSP in-label %u nexthop %s " | |
1651 | "out-label %u (old %u)", | |
1652 | in_label, buf, out_label, snhlfe->out_label); | |
1653 | } | |
1654 | snhlfe->out_label = out_label; | |
1655 | } | |
1656 | else | |
1657 | { | |
1658 | /* Add static LSP entry to this nexthop */ | |
1659 | snhlfe = snhlfe_add (slsp, gtype, gate, ifname, ifindex, out_label); | |
1660 | if (!snhlfe) | |
1661 | return -1; | |
1662 | ||
1663 | if (IS_ZEBRA_DEBUG_MPLS) | |
1664 | { | |
1665 | snhlfe2str (snhlfe, buf, BUFSIZ); | |
1666 | zlog_debug ("Add static LSP in-label %u nexthop %s out-label %u", | |
1667 | in_label, buf, out_label); | |
1668 | } | |
1669 | } | |
1670 | ||
40c7bdb0 | 1671 | /* (Re)Install LSP in the main table. */ |
ce549947 RW |
1672 | if (mpls_lsp_install (zvrf, ZEBRA_LSP_STATIC, in_label, out_label, gtype, |
1673 | gate, ifname, ifindex)) | |
40c7bdb0 | 1674 | return -1; |
1675 | ||
7758e3f3 | 1676 | return 0; |
1677 | } | |
1678 | ||
1679 | /* | |
1680 | * Delete static LSP entry. This may be the delete of one particular | |
1681 | * NHLFE for this incoming label or the delete of the entire entry (i.e., | |
1682 | * all NHLFEs). | |
1683 | * NOTE: Delete of the only NHLFE will also end up deleting the entire | |
1684 | * LSP configuration. | |
1685 | */ | |
1686 | int | |
1687 | zebra_mpls_static_lsp_del (struct zebra_vrf *zvrf, mpls_label_t in_label, | |
1688 | enum nexthop_types_t gtype, union g_addr *gate, | |
1689 | char *ifname, ifindex_t ifindex) | |
1690 | { | |
1691 | struct hash *slsp_table; | |
1692 | zebra_ile_t tmp_ile; | |
1693 | zebra_slsp_t *slsp; | |
1694 | zebra_snhlfe_t *snhlfe; | |
1695 | ||
1696 | /* Lookup table. */ | |
1697 | slsp_table = zvrf->slsp_table; | |
1698 | if (!slsp_table) | |
1699 | return -1; | |
1700 | ||
1701 | /* If entry is not present, exit. */ | |
1702 | tmp_ile.in_label = in_label; | |
1703 | slsp = hash_lookup (slsp_table, &tmp_ile); | |
1704 | if (!slsp) | |
1705 | return 0; | |
1706 | ||
1707 | /* Is it delete of entire LSP or a specific NHLFE? */ | |
1708 | if (gtype == NEXTHOP_TYPE_BLACKHOLE) | |
1709 | { | |
1710 | if (IS_ZEBRA_DEBUG_MPLS) | |
1711 | zlog_debug ("Del static LSP in-label %u", in_label); | |
1712 | ||
40c7bdb0 | 1713 | /* Uninstall entire LSP from the main table. */ |
ce549947 | 1714 | mpls_static_lsp_uninstall_all (zvrf, in_label); |
40c7bdb0 | 1715 | |
7758e3f3 | 1716 | /* Delete all static NHLFEs */ |
1717 | snhlfe_del_all (slsp); | |
1718 | } | |
1719 | else | |
1720 | { | |
1721 | /* Find specific NHLFE, exit if not found. */ | |
1722 | snhlfe = snhlfe_find (slsp, gtype, gate, ifname, ifindex); | |
1723 | if (!snhlfe) | |
1724 | return 0; | |
1725 | ||
1726 | if (IS_ZEBRA_DEBUG_MPLS) | |
1727 | { | |
1728 | char buf[BUFSIZ]; | |
1729 | snhlfe2str (snhlfe, buf, BUFSIZ); | |
1730 | zlog_debug ("Del static LSP in-label %u nexthop %s", | |
1731 | in_label, buf); | |
1732 | } | |
1733 | ||
40c7bdb0 | 1734 | /* Uninstall LSP from the main table. */ |
ce549947 RW |
1735 | mpls_lsp_uninstall (zvrf, ZEBRA_LSP_STATIC, in_label, gtype, gate, |
1736 | ifname, ifindex); | |
40c7bdb0 | 1737 | |
7758e3f3 | 1738 | /* Delete static LSP NHLFE */ |
1739 | snhlfe_del (snhlfe); | |
1740 | } | |
1741 | ||
1742 | /* Remove entire static LSP entry if no NHLFE - valid in either case above. */ | |
1743 | if (!slsp->snhlfe_list) | |
1744 | { | |
1745 | slsp = hash_release(slsp_table, &tmp_ile); | |
1746 | if (slsp) | |
1747 | XFREE(MTYPE_SLSP, slsp); | |
1748 | } | |
1749 | ||
1750 | return 0; | |
1751 | } | |
1752 | ||
40c7bdb0 | 1753 | /* |
1754 | * Schedule all MPLS label forwarding entries for processing. | |
1755 | * Called upon changes that may affect one or more of them such as | |
1756 | * interface or nexthop state changes. | |
1757 | */ | |
1758 | void | |
1759 | zebra_mpls_lsp_schedule (struct zebra_vrf *zvrf) | |
1760 | { | |
1761 | if (!zvrf) | |
1762 | return; | |
1763 | hash_iterate(zvrf->lsp_table, lsp_schedule, NULL); | |
1764 | } | |
1765 | ||
3ab18ff2 | 1766 | /* |
1767 | * Display MPLS label forwarding table for a specific LSP | |
1768 | * (VTY command handler). | |
1769 | */ | |
1770 | void | |
b78b820d | 1771 | zebra_mpls_print_lsp (struct vty *vty, struct zebra_vrf *zvrf, mpls_label_t label, |
1772 | u_char use_json) | |
3ab18ff2 | 1773 | { |
1774 | struct hash *lsp_table; | |
1775 | zebra_lsp_t *lsp; | |
1776 | zebra_ile_t tmp_ile; | |
b78b820d | 1777 | json_object *json = NULL; |
3ab18ff2 | 1778 | |
1779 | /* Lookup table. */ | |
1780 | lsp_table = zvrf->lsp_table; | |
1781 | if (!lsp_table) | |
1782 | return; | |
1783 | ||
1784 | /* If entry is not present, exit. */ | |
1785 | tmp_ile.in_label = label; | |
1786 | lsp = hash_lookup (lsp_table, &tmp_ile); | |
1787 | if (!lsp) | |
1788 | return; | |
1789 | ||
b78b820d | 1790 | if (use_json) |
1791 | { | |
1792 | json = lsp_json(lsp); | |
2aac5767 | 1793 | vty_out (vty, "%s%s", json_object_to_json_string_ext(json, JSON_C_TO_STRING_PRETTY), VTY_NEWLINE); |
b78b820d | 1794 | json_object_free(json); |
1795 | } | |
1796 | else | |
1797 | lsp_print (lsp, (void *)vty); | |
3ab18ff2 | 1798 | } |
1799 | ||
1800 | /* | |
1801 | * Display MPLS label forwarding table (VTY command handler). | |
1802 | */ | |
1803 | void | |
b78b820d | 1804 | zebra_mpls_print_lsp_table (struct vty *vty, struct zebra_vrf *zvrf, |
1805 | u_char use_json) | |
3ab18ff2 | 1806 | { |
b78b820d | 1807 | char buf[BUFSIZ]; |
1808 | json_object *json = NULL; | |
1809 | zebra_lsp_t *lsp = NULL; | |
1810 | zebra_nhlfe_t *nhlfe = NULL; | |
1811 | struct nexthop *nexthop = NULL; | |
1812 | struct listnode *node = NULL; | |
1813 | struct list *lsp_list = hash_get_sorted_list(zvrf->lsp_table, lsp_cmp); | |
1814 | ||
1815 | if (use_json) | |
1816 | { | |
1817 | json = json_object_new_object(); | |
1818 | ||
1819 | for (ALL_LIST_ELEMENTS_RO(lsp_list, node, lsp)) | |
1820 | json_object_object_add(json, label2str(lsp->ile.in_label, buf, BUFSIZ), | |
1821 | lsp_json(lsp)); | |
1822 | ||
2aac5767 | 1823 | vty_out (vty, "%s%s", json_object_to_json_string_ext(json, JSON_C_TO_STRING_PRETTY), VTY_NEWLINE); |
b78b820d | 1824 | json_object_free(json); |
1825 | } | |
1826 | else | |
1827 | { | |
1828 | vty_out (vty, " Inbound Outbound%s", VTY_NEWLINE); | |
1829 | vty_out (vty, " Label Type Nexthop Label%s", VTY_NEWLINE); | |
1830 | vty_out (vty, "-------- ------- --------------- --------%s", VTY_NEWLINE); | |
1831 | ||
1832 | for (ALL_LIST_ELEMENTS_RO(lsp_list, node, lsp)) | |
1833 | { | |
1834 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) | |
1835 | { | |
1836 | vty_out (vty, "%8d %7s ", lsp->ile.in_label, nhlfe_type2str(nhlfe->type)); | |
1837 | nexthop = nhlfe->nexthop; | |
1838 | ||
1839 | switch (nexthop->type) | |
1840 | { | |
1841 | case NEXTHOP_TYPE_IPV4: | |
88d88a9c | 1842 | case NEXTHOP_TYPE_IPV4_IFINDEX: |
b78b820d | 1843 | vty_out (vty, "%15s", inet_ntoa (nexthop->gate.ipv4)); |
1844 | break; | |
1845 | case NEXTHOP_TYPE_IPV6: | |
1846 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1847 | vty_out (vty, "%15s", inet_ntop (AF_INET6, &nexthop->gate.ipv6, buf, BUFSIZ)); | |
1848 | break; | |
1849 | default: | |
1850 | break; | |
1851 | } | |
1852 | ||
1853 | vty_out (vty, " %8d%s", nexthop->nh_label->label[0], VTY_NEWLINE); | |
1854 | } | |
1855 | } | |
1856 | ||
1857 | vty_out (vty, "%s", VTY_NEWLINE); | |
1858 | } | |
1859 | ||
58ac32e2 | 1860 | list_delete (lsp_list); |
3ab18ff2 | 1861 | } |
1862 | ||
7758e3f3 | 1863 | /* |
1864 | * Display MPLS LSP configuration of all static LSPs (VTY command handler). | |
1865 | */ | |
1866 | int | |
1867 | zebra_mpls_write_lsp_config (struct vty *vty, struct zebra_vrf *zvrf) | |
1868 | { | |
b78b820d | 1869 | zebra_slsp_t *slsp; |
1870 | zebra_snhlfe_t *snhlfe; | |
1871 | struct listnode *node; | |
b78b820d | 1872 | struct list *slsp_list = hash_get_sorted_list(zvrf->slsp_table, slsp_cmp); |
1873 | ||
1874 | for (ALL_LIST_ELEMENTS_RO(slsp_list, node, slsp)) | |
1875 | { | |
1876 | for (snhlfe = slsp->snhlfe_list; snhlfe; snhlfe = snhlfe->next) | |
1877 | { | |
e64f3c32 | 1878 | char buf[INET6_ADDRSTRLEN]; |
b78b820d | 1879 | char lstr[30]; |
e64f3c32 | 1880 | |
b78b820d | 1881 | snhlfe2str (snhlfe, buf, BUFSIZ); |
e64f3c32 RW |
1882 | switch (snhlfe->out_label) { |
1883 | case MPLS_V4_EXP_NULL_LABEL: | |
1884 | case MPLS_V6_EXP_NULL_LABEL: | |
1885 | strlcpy(lstr, "explicit-null", sizeof(lstr)); | |
1886 | break; | |
1887 | case MPLS_IMP_NULL_LABEL: | |
1888 | strlcpy(lstr, "implicit-null", sizeof(lstr)); | |
1889 | break; | |
1890 | default: | |
1891 | sprintf(lstr, "%u", snhlfe->out_label); | |
1892 | break; | |
1893 | } | |
1894 | ||
b78b820d | 1895 | vty_out (vty, "mpls lsp %u %s %s%s", |
e64f3c32 | 1896 | slsp->ile.in_label, buf, lstr, VTY_NEWLINE); |
b78b820d | 1897 | } |
1898 | } | |
1899 | ||
58ac32e2 | 1900 | list_delete (slsp_list); |
7758e3f3 | 1901 | return (zvrf->slsp_table->count ? 1 : 0); |
1902 | } | |
1903 | ||
40c7bdb0 | 1904 | /* |
1905 | * Called upon process exiting, need to delete LSP forwarding | |
1906 | * entries from the kernel. | |
1907 | * NOTE: Currently supported only for default VRF. | |
1908 | */ | |
1909 | void | |
1910 | zebra_mpls_close_tables (struct zebra_vrf *zvrf) | |
1911 | { | |
40c7bdb0 | 1912 | hash_iterate(zvrf->lsp_table, lsp_uninstall_from_kernel, NULL); |
58ac32e2 RW |
1913 | hash_clean(zvrf->lsp_table, NULL); |
1914 | hash_free(zvrf->lsp_table); | |
1915 | hash_clean(zvrf->slsp_table, NULL); | |
1916 | hash_free(zvrf->slsp_table); | |
40c7bdb0 | 1917 | } |
1918 | ||
7758e3f3 | 1919 | /* |
1920 | * Allocate MPLS tables for this VRF and do other initialization. | |
1921 | * NOTE: Currently supported only for default VRF. | |
1922 | */ | |
1923 | void | |
1924 | zebra_mpls_init_tables (struct zebra_vrf *zvrf) | |
1925 | { | |
1926 | if (!zvrf) | |
1927 | return; | |
1928 | zvrf->slsp_table = hash_create(label_hash, label_cmp); | |
40c7bdb0 | 1929 | zvrf->lsp_table = hash_create(label_hash, label_cmp); |
939fba27 | 1930 | zvrf->mpls_flags = 0; |
7758e3f3 | 1931 | } |
1932 | ||
1933 | /* | |
1934 | * Global MPLS initialization. | |
1935 | */ | |
1936 | void | |
1937 | zebra_mpls_init (void) | |
1938 | { | |
fe6c7157 RW |
1939 | if (mpls_kernel_init () < 0) |
1940 | { | |
1941 | zlog_warn ("Disabling MPLS support (no kernel support)"); | |
1942 | return; | |
1943 | } | |
1944 | ||
1945 | mpls_enabled = 1; | |
40c7bdb0 | 1946 | mpls_processq_init (&zebrad); |
7758e3f3 | 1947 | } |