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d62a17ae | 1 | /* |
9d303b37 DL |
2 | * |
3 | * Copyright 2009-2016, LabN Consulting, L.L.C. | |
4 | * | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version 2 | |
9 | * of the License, or (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
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 | |
19 | */ | |
65efcfce LB |
20 | |
21 | /* | |
22 | * File: rfapi_import.c | |
23 | * Purpose: Handle import of routes from BGP to RFAPI | |
24 | */ | |
25 | ||
26 | #include <errno.h> | |
27 | ||
f8b6f499 LB |
28 | #include "lib/zebra.h" |
29 | #include "lib/prefix.h" | |
30 | #include "lib/table.h" | |
31 | #include "lib/vty.h" | |
32 | #include "lib/memory.h" | |
33 | #include "lib/log.h" | |
34 | #include "lib/skiplist.h" | |
35 | #include "lib/thread.h" | |
937652c6 | 36 | #include "lib/stream.h" |
65efcfce | 37 | |
f8b6f499 LB |
38 | #include "bgpd/bgpd.h" |
39 | #include "bgpd/bgp_ecommunity.h" | |
40 | #include "bgpd/bgp_attr.h" | |
41 | #include "bgpd/bgp_route.h" | |
d62a17ae | 42 | #include "bgpd/bgp_mplsvpn.h" /* prefix_rd2str() */ |
f8b6f499 | 43 | #include "bgpd/bgp_vnc_types.h" |
06b9f471 | 44 | #include "bgpd/bgp_rd.h" |
65efcfce | 45 | |
f8b6f499 LB |
46 | #include "bgpd/rfapi/rfapi.h" |
47 | #include "bgpd/rfapi/bgp_rfapi_cfg.h" | |
48 | #include "bgpd/rfapi/rfapi_backend.h" | |
49 | #include "bgpd/rfapi/rfapi_import.h" | |
50 | #include "bgpd/rfapi/rfapi_private.h" | |
51 | #include "bgpd/rfapi/rfapi_monitor.h" | |
52 | #include "bgpd/rfapi/rfapi_nve_addr.h" | |
53 | #include "bgpd/rfapi/rfapi_vty.h" | |
54 | #include "bgpd/rfapi/vnc_export_bgp.h" | |
55 | #include "bgpd/rfapi/vnc_export_bgp_p.h" | |
56 | #include "bgpd/rfapi/vnc_zebra.h" | |
57 | #include "bgpd/rfapi/vnc_import_bgp.h" | |
58 | #include "bgpd/rfapi/vnc_import_bgp_p.h" | |
59 | #include "bgpd/rfapi/rfapi_rib.h" | |
60 | #include "bgpd/rfapi/rfapi_encap_tlv.h" | |
61 | #include "bgpd/rfapi/vnc_debug.h" | |
65efcfce LB |
62 | |
63 | #ifdef HAVE_GLIBC_BACKTRACE | |
64 | /* for backtrace and friends */ | |
65 | #include <execinfo.h> | |
66 | #endif /* HAVE_GLIBC_BACKTRACE */ | |
67 | ||
68 | #undef DEBUG_MONITOR_MOVE_SHORTER | |
69 | #undef DEBUG_RETURNED_NHL | |
70 | #undef DEBUG_ROUTE_COUNTERS | |
71 | #undef DEBUG_ENCAP_MONITOR | |
72 | #undef DEBUG_L2_EXTRA | |
73 | #undef DEBUG_IT_NODES | |
74 | #undef DEBUG_BI_SEARCH | |
75 | ||
76 | /* | |
77 | * Allocated for each withdraw timer instance; freed when the timer | |
78 | * expires or is canceled | |
79 | */ | |
d62a17ae | 80 | struct rfapi_withdraw { |
81 | struct rfapi_import_table *import_table; | |
82 | struct route_node *node; | |
83 | struct bgp_info *info; | |
84 | safi_t safi; /* used only for bulk operations */ | |
85 | /* | |
86 | * For import table node reference count checking (i.e., debugging). | |
87 | * Normally when a timer expires, lockoffset should be 0. However, if | |
88 | * the timer expiration function is called directly (e.g., | |
89 | * rfapiExpireVpnNow), the node could be locked by a preceding | |
90 | * route_top() or route_next() in a loop, so we need to pass this | |
91 | * value in. | |
92 | */ | |
93 | int lockoffset; | |
65efcfce LB |
94 | }; |
95 | ||
d62a17ae | 96 | /* |
65efcfce LB |
97 | * DEBUG FUNCTION |
98 | * It's evil and fiendish. It's compiler-dependent. | |
99 | * ? Might need LDFLAGS -rdynamic to produce all function names | |
100 | */ | |
d62a17ae | 101 | void rfapiDebugBacktrace(void) |
65efcfce LB |
102 | { |
103 | #ifdef HAVE_GLIBC_BACKTRACE | |
104 | #define RFAPI_DEBUG_BACKTRACE_NENTRIES 200 | |
d62a17ae | 105 | void *buf[RFAPI_DEBUG_BACKTRACE_NENTRIES]; |
106 | char **syms; | |
107 | size_t i; | |
108 | size_t size; | |
65efcfce | 109 | |
d62a17ae | 110 | size = backtrace(buf, RFAPI_DEBUG_BACKTRACE_NENTRIES); |
111 | syms = backtrace_symbols(buf, size); | |
65efcfce | 112 | |
d62a17ae | 113 | for (i = 0; i < size && i < RFAPI_DEBUG_BACKTRACE_NENTRIES; ++i) { |
114 | vnc_zlog_debug_verbose("backtrace[%2zu]: %s", i, syms[i]); | |
115 | } | |
65efcfce | 116 | |
d62a17ae | 117 | free(syms); |
65efcfce LB |
118 | #else |
119 | #endif | |
120 | } | |
121 | ||
122 | /* | |
123 | * DEBUG FUNCTION | |
124 | * Count remote routes and compare with actively-maintained values. | |
125 | * Abort if they disagree. | |
126 | */ | |
d62a17ae | 127 | void rfapiCheckRouteCount() |
65efcfce | 128 | { |
d62a17ae | 129 | struct bgp *bgp = bgp_get_default(); |
130 | struct rfapi *h; | |
131 | struct rfapi_import_table *it; | |
132 | afi_t afi; | |
133 | ||
134 | assert(bgp); | |
135 | ||
136 | h = bgp->rfapi; | |
137 | assert(h); | |
138 | ||
139 | for (it = h->imports; it; it = it->next) { | |
140 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
141 | ||
142 | struct route_table *rt; | |
143 | struct route_node *rn; | |
144 | ||
145 | int holddown_count = 0; | |
146 | int local_count = 0; | |
147 | int imported_count = 0; | |
148 | int remote_count = 0; | |
149 | ||
150 | rt = it->imported_vpn[afi]; | |
151 | ||
152 | for (rn = route_top(rt); rn; rn = route_next(rn)) { | |
153 | struct bgp_info *bi; | |
154 | struct bgp_info *next; | |
155 | ||
156 | for (bi = rn->info; bi; bi = next) { | |
157 | next = bi->next; | |
158 | ||
159 | if (CHECK_FLAG(bi->flags, | |
160 | BGP_INFO_REMOVED)) { | |
161 | ++holddown_count; | |
162 | ||
163 | } else { | |
164 | if (RFAPI_LOCAL_BI(bi)) { | |
165 | ++local_count; | |
166 | } else { | |
167 | if (RFAPI_DIRECT_IMPORT_BI( | |
168 | bi)) { | |
169 | ++imported_count; | |
170 | } else { | |
171 | ++remote_count; | |
172 | } | |
173 | } | |
174 | } | |
175 | } | |
176 | } | |
177 | ||
178 | if (it->holddown_count[afi] != holddown_count) { | |
179 | vnc_zlog_debug_verbose( | |
180 | "%s: it->holddown_count %d != holddown_count %d", | |
181 | __func__, it->holddown_count[afi], | |
182 | holddown_count); | |
183 | assert(0); | |
184 | } | |
185 | if (it->remote_count[afi] != remote_count) { | |
186 | vnc_zlog_debug_verbose( | |
187 | "%s: it->remote_count %d != remote_count %d", | |
188 | __func__, it->remote_count[afi], | |
189 | remote_count); | |
190 | assert(0); | |
191 | } | |
192 | if (it->imported_count[afi] != imported_count) { | |
193 | vnc_zlog_debug_verbose( | |
194 | "%s: it->imported_count %d != imported_count %d", | |
195 | __func__, it->imported_count[afi], | |
196 | imported_count); | |
197 | assert(0); | |
198 | } | |
199 | } | |
200 | } | |
65efcfce LB |
201 | } |
202 | ||
203 | #if DEBUG_ROUTE_COUNTERS | |
204 | #define VNC_ITRCCK do {rfapiCheckRouteCount();} while (0) | |
205 | #else | |
206 | #define VNC_ITRCCK | |
207 | #endif | |
208 | ||
209 | /* | |
210 | * Validate reference count for a node in an import table | |
211 | * | |
212 | * Normally lockoffset is 0 for nodes in quiescent state. However, | |
213 | * route_unlock_node will delete the node if it is called when | |
214 | * node->lock == 1, and we have to validate the refcount before | |
215 | * the node is deleted. In this case, we specify lockoffset 1. | |
216 | */ | |
d62a17ae | 217 | void rfapiCheckRefcount(struct route_node *rn, safi_t safi, int lockoffset) |
65efcfce | 218 | { |
d62a17ae | 219 | unsigned int count_bi = 0; |
220 | unsigned int count_monitor = 0; | |
221 | struct bgp_info *bi; | |
222 | struct rfapi_monitor_encap *hme; | |
223 | struct rfapi_monitor_vpn *hmv; | |
224 | ||
225 | for (bi = rn->info; bi; bi = bi->next) | |
226 | ++count_bi; | |
227 | ||
228 | ||
229 | if (rn->aggregate) { | |
230 | ++count_monitor; /* rfapi_it_extra */ | |
231 | ||
232 | switch (safi) { | |
233 | void *cursor; | |
234 | int rc; | |
235 | ||
236 | case SAFI_ENCAP: | |
237 | for (hme = RFAPI_MONITOR_ENCAP(rn); hme; | |
238 | hme = hme->next) | |
239 | ++count_monitor; | |
240 | break; | |
241 | ||
242 | case SAFI_MPLS_VPN: | |
243 | ||
244 | for (hmv = RFAPI_MONITOR_VPN(rn); hmv; hmv = hmv->next) | |
245 | ++count_monitor; | |
246 | ||
247 | if (RFAPI_MONITOR_EXTERIOR(rn)->source) { | |
248 | ++count_monitor; /* sl */ | |
249 | cursor = NULL; | |
250 | for (rc = skiplist_next( | |
251 | RFAPI_MONITOR_EXTERIOR(rn)->source, | |
252 | NULL, NULL, &cursor); | |
253 | !rc; | |
254 | rc = skiplist_next( | |
255 | RFAPI_MONITOR_EXTERIOR(rn)->source, | |
256 | NULL, NULL, &cursor)) { | |
257 | ||
258 | ++count_monitor; /* sl entry */ | |
259 | } | |
260 | } | |
261 | break; | |
262 | ||
263 | default: | |
264 | assert(0); | |
265 | } | |
266 | } | |
267 | ||
268 | if (count_bi + count_monitor + lockoffset != rn->lock) { | |
269 | vnc_zlog_debug_verbose( | |
270 | "%s: count_bi=%d, count_monitor=%d, lockoffset=%d, rn->lock=%d", | |
271 | __func__, count_bi, count_monitor, lockoffset, | |
272 | rn->lock); | |
273 | assert(0); | |
274 | } | |
65efcfce LB |
275 | } |
276 | ||
277 | /* | |
278 | * Perform deferred rfapi_close operations that were queued | |
279 | * during callbacks. | |
280 | */ | |
d62a17ae | 281 | static wq_item_status rfapi_deferred_close_workfunc(struct work_queue *q, |
282 | void *data) | |
65efcfce | 283 | { |
d62a17ae | 284 | struct rfapi_descriptor *rfd = data; |
285 | struct rfapi *h = q->spec.data; | |
286 | ||
287 | assert(!(h->flags & RFAPI_INCALLBACK)); | |
288 | rfapi_close(rfd); | |
289 | vnc_zlog_debug_verbose("%s: completed deferred close on handle %p", | |
290 | __func__, rfd); | |
291 | return WQ_SUCCESS; | |
65efcfce LB |
292 | } |
293 | ||
294 | /* | |
295 | * Extract layer 2 option from Encap TLVS in BGP attrs | |
296 | */ | |
d62a17ae | 297 | int rfapiGetL2o(struct attr *attr, struct rfapi_l2address_option *l2o) |
65efcfce | 298 | { |
d62a17ae | 299 | if (attr) { |
300 | ||
301 | struct bgp_attr_encap_subtlv *pEncap; | |
302 | ||
303 | for (pEncap = attr->vnc_subtlvs; pEncap; | |
304 | pEncap = pEncap->next) { | |
305 | ||
306 | if (pEncap->type == BGP_VNC_SUBTLV_TYPE_RFPOPTION) { | |
307 | if (pEncap->value[0] | |
308 | == RFAPI_VN_OPTION_TYPE_L2ADDR) { | |
309 | ||
310 | if (pEncap->value[1] == 14) { | |
311 | memcpy(l2o->macaddr.octet, | |
312 | pEncap->value + 2, | |
28328ea9 | 313 | ETH_ALEN); |
d62a17ae | 314 | l2o->label = |
315 | ((pEncap->value[10] | |
316 | >> 4) | |
317 | & 0x0f) | |
318 | + ((pEncap->value[9] | |
319 | << 4) | |
320 | & 0xff0) | |
321 | + ((pEncap->value[8] | |
322 | << 12) | |
323 | & 0xff000); | |
324 | ||
325 | l2o->local_nve_id = | |
326 | pEncap->value[12]; | |
327 | ||
328 | l2o->logical_net_id = | |
329 | (pEncap->value[15] | |
330 | & 0xff) | |
331 | + ((pEncap->value[14] | |
332 | << 8) | |
333 | & 0xff00) | |
334 | + ((pEncap->value[13] | |
335 | << 16) | |
336 | & 0xff0000); | |
337 | } | |
338 | ||
339 | return 0; | |
340 | } | |
341 | } | |
342 | } | |
343 | } | |
344 | ||
345 | return ENOENT; | |
65efcfce LB |
346 | } |
347 | ||
348 | /* | |
349 | * Extract the lifetime from the Tunnel Encap attribute of a route in | |
350 | * an import table | |
351 | */ | |
d62a17ae | 352 | int rfapiGetVncLifetime(struct attr *attr, uint32_t *lifetime) |
65efcfce | 353 | { |
d62a17ae | 354 | struct bgp_attr_encap_subtlv *pEncap; |
65efcfce | 355 | |
d62a17ae | 356 | *lifetime = RFAPI_INFINITE_LIFETIME; /* default to infinite */ |
65efcfce | 357 | |
d62a17ae | 358 | if (attr) { |
65efcfce | 359 | |
d62a17ae | 360 | for (pEncap = attr->vnc_subtlvs; pEncap; |
361 | pEncap = pEncap->next) { | |
65efcfce | 362 | |
d62a17ae | 363 | if (pEncap->type |
364 | == BGP_VNC_SUBTLV_TYPE_LIFETIME) { /* lifetime */ | |
365 | if (pEncap->length == 4) { | |
366 | memcpy(lifetime, pEncap->value, 4); | |
367 | *lifetime = ntohl(*lifetime); | |
368 | return 0; | |
369 | } | |
370 | } | |
371 | } | |
372 | } | |
65efcfce | 373 | |
d62a17ae | 374 | return ENOENT; |
65efcfce LB |
375 | } |
376 | ||
377 | /* | |
378 | * Extract the tunnel type from the extended community | |
379 | */ | |
d62a17ae | 380 | int rfapiGetTunnelType(struct attr *attr, bgp_encap_types *type) |
65efcfce | 381 | { |
d62a17ae | 382 | *type = BGP_ENCAP_TYPE_MPLS; /* default to MPLS */ |
383 | if (attr && attr->ecommunity) { | |
384 | struct ecommunity *ecom = attr->ecommunity; | |
385 | int i; | |
386 | ||
387 | for (i = 0; i < (ecom->size * ECOMMUNITY_SIZE); | |
388 | i += ECOMMUNITY_SIZE) { | |
389 | uint8_t *ep; | |
390 | ||
391 | ep = ecom->val + i; | |
392 | if (ep[0] == ECOMMUNITY_ENCODE_OPAQUE | |
393 | && ep[1] == ECOMMUNITY_OPAQUE_SUBTYPE_ENCAP) { | |
394 | *type = (ep[6] << 8) + ep[7]; | |
395 | return 0; | |
396 | } | |
397 | } | |
398 | } | |
399 | ||
400 | return ENOENT; | |
65efcfce LB |
401 | } |
402 | ||
403 | ||
404 | /* | |
405 | * Look for UN address in Encap attribute | |
406 | */ | |
d62a17ae | 407 | int rfapiGetVncTunnelUnAddr(struct attr *attr, struct prefix *p) |
65efcfce | 408 | { |
d62a17ae | 409 | struct bgp_attr_encap_subtlv *pEncap; |
410 | bgp_encap_types tun_type; | |
411 | ||
412 | rfapiGetTunnelType(attr, &tun_type); | |
413 | if (tun_type == BGP_ENCAP_TYPE_MPLS) { | |
414 | if (!p) | |
415 | return 0; | |
416 | /* MPLS carries UN address in next hop */ | |
417 | rfapiNexthop2Prefix(attr, p); | |
418 | if (p->family != 0) | |
419 | return 0; | |
420 | ||
421 | return ENOENT; | |
422 | } | |
423 | if (attr) { | |
424 | for (pEncap = attr->encap_subtlvs; pEncap; | |
425 | pEncap = pEncap->next) { | |
426 | ||
427 | if (pEncap->type | |
428 | == BGP_ENCAP_SUBTLV_TYPE_REMOTE_ENDPOINT) { /* un | |
429 | addr | |
430 | */ | |
431 | switch (pEncap->length) { | |
432 | case 8: | |
433 | if (p) { | |
434 | p->family = AF_INET; | |
435 | p->prefixlen = 32; | |
436 | memcpy(p->u.val, pEncap->value, | |
437 | 4); | |
438 | } | |
439 | return 0; | |
440 | ||
441 | case 20: | |
442 | if (p) { | |
443 | p->family = AF_INET6; | |
444 | p->prefixlen = 128; | |
445 | memcpy(p->u.val, pEncap->value, | |
446 | 16); | |
447 | } | |
448 | return 0; | |
449 | } | |
450 | } | |
451 | } | |
452 | } | |
453 | ||
454 | return ENOENT; | |
65efcfce LB |
455 | } |
456 | ||
457 | /* | |
458 | * Get UN address wherever it might be | |
459 | */ | |
d62a17ae | 460 | int rfapiGetUnAddrOfVpnBi(struct bgp_info *bi, struct prefix *p) |
65efcfce | 461 | { |
d62a17ae | 462 | /* If it's in this route's VNC attribute, we're done */ |
463 | if (!rfapiGetVncTunnelUnAddr(bi->attr, p)) | |
464 | return 0; | |
465 | /* | |
466 | * Otherwise, see if it's cached from a corresponding ENCAP SAFI | |
467 | * advertisement | |
468 | */ | |
469 | if (bi->extra) { | |
470 | switch (bi->extra->vnc.import.un_family) { | |
471 | case AF_INET: | |
472 | if (p) { | |
473 | p->family = bi->extra->vnc.import.un_family; | |
474 | p->u.prefix4 = bi->extra->vnc.import.un.addr4; | |
475 | p->prefixlen = 32; | |
476 | } | |
477 | return 0; | |
478 | case AF_INET6: | |
479 | if (p) { | |
480 | p->family = bi->extra->vnc.import.un_family; | |
481 | p->u.prefix6 = bi->extra->vnc.import.un.addr6; | |
482 | p->prefixlen = 128; | |
483 | } | |
484 | return 0; | |
485 | default: | |
486 | if (p) | |
487 | p->family = 0; | |
65efcfce | 488 | #if DEBUG_ENCAP_MONITOR |
d62a17ae | 489 | vnc_zlog_debug_verbose( |
490 | "%s: bi->extra->vnc.import.un_family is 0, no UN addr", | |
491 | __func__); | |
65efcfce | 492 | #endif |
d62a17ae | 493 | break; |
494 | } | |
495 | } | |
65efcfce | 496 | |
d62a17ae | 497 | return ENOENT; |
65efcfce LB |
498 | } |
499 | ||
500 | ||
501 | /* | |
502 | * Make a new bgp_info from gathered parameters | |
503 | */ | |
d62a17ae | 504 | static struct bgp_info *rfapiBgpInfoCreate(struct attr *attr, struct peer *peer, |
505 | void *rfd, struct prefix_rd *prd, | |
d7c0a89a | 506 | uint8_t type, uint8_t sub_type, |
d62a17ae | 507 | uint32_t *label) |
65efcfce | 508 | { |
d62a17ae | 509 | struct bgp_info *new; |
510 | ||
511 | new = bgp_info_new(); | |
512 | assert(new); | |
513 | ||
514 | if (attr) { | |
515 | if (!new->attr) | |
516 | new->attr = bgp_attr_intern(attr); | |
517 | } | |
518 | bgp_info_extra_get(new); | |
519 | if (prd) { | |
520 | new->extra->vnc.import.rd = *prd; | |
521 | rfapi_time(&new->extra->vnc.import.create_time); | |
522 | } | |
523 | if (label) | |
317f1fe0 | 524 | encode_label(*label, &new->extra->label[0]); |
d62a17ae | 525 | new->type = type; |
526 | new->sub_type = sub_type; | |
527 | new->peer = peer; | |
528 | peer_lock(peer); | |
529 | ||
530 | return new; | |
65efcfce LB |
531 | } |
532 | ||
533 | /* | |
534 | * Frees bgp_info as used in import tables (parts are not | |
535 | * allocated exactly the way they are in the main RIBs) | |
536 | */ | |
d62a17ae | 537 | static void rfapiBgpInfoFree(struct bgp_info *goner) |
65efcfce | 538 | { |
d62a17ae | 539 | if (!goner) |
540 | return; | |
541 | ||
542 | if (goner->peer) { | |
543 | vnc_zlog_debug_verbose("%s: calling peer_unlock(%p), #%d", | |
544 | __func__, goner->peer, | |
545 | goner->peer->lock); | |
546 | peer_unlock(goner->peer); | |
547 | } | |
548 | ||
549 | if (goner->attr) { | |
550 | bgp_attr_unintern(&goner->attr); | |
551 | } | |
552 | if (goner->extra) { | |
553 | assert(!goner->extra->damp_info); /* Not used in import tbls */ | |
554 | XFREE(MTYPE_BGP_ROUTE_EXTRA, goner->extra); | |
555 | goner->extra = NULL; | |
556 | } | |
557 | XFREE(MTYPE_BGP_ROUTE, goner); | |
65efcfce LB |
558 | } |
559 | ||
d62a17ae | 560 | struct rfapi_import_table *rfapiMacImportTableGetNoAlloc(struct bgp *bgp, |
561 | uint32_t lni) | |
65efcfce | 562 | { |
d62a17ae | 563 | struct rfapi *h; |
564 | struct rfapi_import_table *it = NULL; | |
565 | uintptr_t lni_as_ptr = lni; | |
65efcfce | 566 | |
d62a17ae | 567 | h = bgp->rfapi; |
568 | if (!h) | |
569 | return NULL; | |
65efcfce | 570 | |
d62a17ae | 571 | if (!h->import_mac) |
572 | return NULL; | |
65efcfce | 573 | |
d62a17ae | 574 | if (skiplist_search(h->import_mac, (void *)lni_as_ptr, (void **)&it)) |
575 | return NULL; | |
65efcfce | 576 | |
d62a17ae | 577 | return it; |
65efcfce LB |
578 | } |
579 | ||
d62a17ae | 580 | struct rfapi_import_table *rfapiMacImportTableGet(struct bgp *bgp, uint32_t lni) |
65efcfce | 581 | { |
d62a17ae | 582 | struct rfapi *h; |
583 | struct rfapi_import_table *it = NULL; | |
584 | uintptr_t lni_as_ptr = lni; | |
585 | ||
586 | h = bgp->rfapi; | |
587 | assert(h); | |
588 | ||
589 | if (!h->import_mac) { | |
590 | /* default cmp is good enough for LNI */ | |
591 | h->import_mac = skiplist_new(0, NULL, NULL); | |
592 | } | |
593 | ||
594 | if (skiplist_search(h->import_mac, (void *)lni_as_ptr, (void **)&it)) { | |
595 | ||
596 | struct ecommunity *enew; | |
597 | struct ecommunity_val eval; | |
598 | afi_t afi; | |
599 | ||
600 | it = XCALLOC(MTYPE_RFAPI_IMPORTTABLE, | |
601 | sizeof(struct rfapi_import_table)); | |
602 | /* set RT list of new import table based on LNI */ | |
603 | memset((char *)&eval, 0, sizeof(eval)); | |
604 | eval.val[0] = 0; /* VNC L2VPN */ | |
605 | eval.val[1] = 2; /* VNC L2VPN */ | |
606 | eval.val[5] = (lni >> 16) & 0xff; | |
607 | eval.val[6] = (lni >> 8) & 0xff; | |
608 | eval.val[7] = (lni >> 0) & 0xff; | |
609 | ||
610 | enew = ecommunity_new(); | |
611 | ecommunity_add_val(enew, &eval); | |
612 | it->rt_import_list = enew; | |
613 | ||
614 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
615 | it->imported_vpn[afi] = route_table_init(); | |
616 | it->imported_encap[afi] = route_table_init(); | |
617 | } | |
618 | ||
619 | it->l2_logical_net_id = lni; | |
620 | ||
621 | skiplist_insert(h->import_mac, (void *)lni_as_ptr, it); | |
622 | } | |
623 | ||
624 | assert(it); | |
625 | return it; | |
65efcfce LB |
626 | } |
627 | ||
628 | /* | |
629 | * Implement MONITOR_MOVE_SHORTER(original_node) from | |
630 | * RFAPI-Import-Event-Handling.txt | |
d62a17ae | 631 | * |
65efcfce LB |
632 | * Returns pointer to the list of moved monitors |
633 | */ | |
634 | static struct rfapi_monitor_vpn * | |
d62a17ae | 635 | rfapiMonitorMoveShorter(struct route_node *original_vpn_node, int lockoffset) |
65efcfce | 636 | { |
d62a17ae | 637 | struct bgp_info *bi; |
638 | struct route_node *par; | |
639 | struct rfapi_monitor_vpn *m; | |
640 | struct rfapi_monitor_vpn *mlast; | |
641 | struct rfapi_monitor_vpn *moved; | |
642 | int movecount = 0; | |
643 | int parent_already_refcounted = 0; | |
65efcfce | 644 | |
d62a17ae | 645 | RFAPI_CHECK_REFCOUNT(original_vpn_node, SAFI_MPLS_VPN, lockoffset); |
65efcfce LB |
646 | |
647 | #if DEBUG_MONITOR_MOVE_SHORTER | |
d62a17ae | 648 | { |
872ed4c7 | 649 | char buf[PREFIX_STRLEN]; |
65efcfce | 650 | |
872ed4c7 | 651 | prefix2str(&original_vpn_node->p, buf, sizeof(buf)); |
d62a17ae | 652 | vnc_zlog_debug_verbose("%s: called with node pfx=%s", __func__, |
653 | buf); | |
654 | } | |
65efcfce LB |
655 | #endif |
656 | ||
d62a17ae | 657 | /* |
658 | * 1. If there is at least one bi (either regular route or | |
659 | * route marked as withdrawn, with a pending timer) at | |
660 | * original_node with a valid UN address, we're done. Return. | |
661 | */ | |
662 | for (bi = original_vpn_node->info; bi; bi = bi->next) { | |
663 | struct prefix pfx; | |
664 | ||
665 | if (!rfapiGetUnAddrOfVpnBi(bi, &pfx)) { | |
65efcfce | 666 | #if DEBUG_MONITOR_MOVE_SHORTER |
d62a17ae | 667 | vnc_zlog_debug_verbose( |
668 | "%s: have valid UN at original node, no change", | |
669 | __func__); | |
65efcfce | 670 | #endif |
d62a17ae | 671 | return NULL; |
672 | } | |
673 | } | |
674 | ||
675 | /* | |
676 | * 2. Travel up the tree (toward less-specific prefixes) from | |
677 | * original_node to find the first node that has at least | |
678 | * one route (even if it is only a withdrawn route) with a | |
679 | * valid UN address. Call this node "Node P." | |
680 | */ | |
681 | for (par = original_vpn_node->parent; par; par = par->parent) { | |
682 | for (bi = par->info; bi; bi = bi->next) { | |
683 | struct prefix pfx; | |
684 | if (!rfapiGetUnAddrOfVpnBi(bi, &pfx)) { | |
685 | break; | |
686 | } | |
687 | } | |
688 | if (bi) | |
689 | break; | |
690 | } | |
691 | ||
692 | if (par) { | |
693 | RFAPI_CHECK_REFCOUNT(par, SAFI_MPLS_VPN, 0); | |
694 | } | |
695 | ||
696 | /* | |
697 | * If no less-specific routes, try to use the 0/0 node | |
698 | */ | |
699 | if (!par) { | |
700 | /* this isn't necessarily 0/0 */ | |
701 | par = route_top(original_vpn_node->table); | |
702 | ||
703 | /* | |
704 | * If we got the top node but it wasn't 0/0, | |
705 | * ignore it | |
706 | */ | |
707 | if (par && par->p.prefixlen) { | |
708 | route_unlock_node(par); /* maybe free */ | |
709 | par = NULL; | |
710 | } | |
711 | ||
712 | if (par) { | |
713 | ++parent_already_refcounted; | |
714 | } | |
715 | } | |
716 | ||
717 | /* | |
718 | * Create 0/0 node if it isn't there | |
719 | */ | |
720 | if (!par) { | |
721 | struct prefix pfx_default; | |
722 | ||
723 | memset(&pfx_default, 0, sizeof(pfx_default)); | |
724 | pfx_default.family = original_vpn_node->p.family; | |
725 | ||
726 | /* creates default node if none exists */ | |
727 | par = route_node_get(original_vpn_node->table, &pfx_default); | |
728 | ++parent_already_refcounted; | |
729 | } | |
730 | ||
731 | /* | |
732 | * 3. Move each of the monitors found at original_node to Node P. | |
733 | * These are "Moved Monitors." | |
734 | * | |
735 | */ | |
736 | ||
737 | /* | |
738 | * Attach at end so that the list pointer we return points | |
739 | * only to the moved routes | |
740 | */ | |
741 | for (m = RFAPI_MONITOR_VPN(par), mlast = NULL; m; | |
742 | mlast = m, m = m->next) | |
743 | ; | |
744 | ||
745 | if (mlast) { | |
746 | moved = mlast->next = RFAPI_MONITOR_VPN(original_vpn_node); | |
747 | } else { | |
748 | moved = RFAPI_MONITOR_VPN_W_ALLOC(par) = | |
749 | RFAPI_MONITOR_VPN(original_vpn_node); | |
750 | } | |
751 | if (RFAPI_MONITOR_VPN( | |
752 | original_vpn_node)) /* check agg, so not allocated */ | |
753 | RFAPI_MONITOR_VPN_W_ALLOC(original_vpn_node) = NULL; | |
754 | ||
755 | /* | |
756 | * update the node pointers on the monitors | |
757 | */ | |
758 | for (m = moved; m; m = m->next) { | |
759 | ++movecount; | |
760 | m->node = par; | |
761 | } | |
762 | ||
763 | RFAPI_CHECK_REFCOUNT(par, SAFI_MPLS_VPN, | |
764 | parent_already_refcounted - movecount); | |
765 | while (movecount > parent_already_refcounted) { | |
766 | route_lock_node(par); | |
767 | ++parent_already_refcounted; | |
768 | } | |
769 | while (movecount < parent_already_refcounted) { | |
770 | /* unlikely, but code defensively */ | |
771 | route_unlock_node(par); | |
772 | --parent_already_refcounted; | |
773 | } | |
774 | RFAPI_CHECK_REFCOUNT(original_vpn_node, SAFI_MPLS_VPN, | |
775 | movecount + lockoffset); | |
776 | while (movecount--) { | |
777 | route_unlock_node(original_vpn_node); | |
778 | } | |
65efcfce LB |
779 | |
780 | #if DEBUG_MONITOR_MOVE_SHORTER | |
d62a17ae | 781 | { |
872ed4c7 | 782 | char buf[PREFIX_STRLEN]; |
65efcfce | 783 | |
872ed4c7 | 784 | prefix2str(&par->p, buf, sizeof(buf)); |
d62a17ae | 785 | vnc_zlog_debug_verbose("%s: moved to node pfx=%s", __func__, |
786 | buf); | |
787 | } | |
65efcfce LB |
788 | #endif |
789 | ||
790 | ||
d62a17ae | 791 | return moved; |
65efcfce LB |
792 | } |
793 | ||
794 | /* | |
795 | * Implement MONITOR_MOVE_LONGER(new_node) from | |
796 | * RFAPI-Import-Event-Handling.txt | |
797 | */ | |
d62a17ae | 798 | static void rfapiMonitorMoveLonger(struct route_node *new_vpn_node) |
65efcfce | 799 | { |
d62a17ae | 800 | struct rfapi_monitor_vpn *monitor; |
801 | struct rfapi_monitor_vpn *mlast; | |
802 | struct bgp_info *bi; | |
803 | struct route_node *par; | |
804 | ||
805 | RFAPI_CHECK_REFCOUNT(new_vpn_node, SAFI_MPLS_VPN, 0); | |
806 | ||
807 | /* | |
808 | * Make sure we have at least one valid route at the new node | |
809 | */ | |
810 | for (bi = new_vpn_node->info; bi; bi = bi->next) { | |
811 | struct prefix pfx; | |
812 | if (!rfapiGetUnAddrOfVpnBi(bi, &pfx)) | |
813 | break; | |
814 | } | |
815 | ||
816 | if (!bi) { | |
817 | vnc_zlog_debug_verbose( | |
818 | "%s: no valid routes at node %p, so not attempting moves", | |
819 | __func__, new_vpn_node); | |
820 | return; | |
821 | } | |
822 | ||
823 | /* | |
824 | * Find first parent node that has monitors | |
825 | */ | |
826 | for (par = new_vpn_node->parent; par; par = par->parent) { | |
827 | if (RFAPI_MONITOR_VPN(par)) | |
828 | break; | |
829 | } | |
830 | ||
831 | if (!par) { | |
832 | vnc_zlog_debug_verbose( | |
833 | "%s: no parent nodes with monitors, done", __func__); | |
834 | return; | |
835 | } | |
836 | ||
837 | /* | |
838 | * Check each of these monitors to see of their longest-match | |
839 | * is now the updated node. Move any such monitors to the more- | |
840 | * specific updated node | |
841 | */ | |
842 | for (mlast = NULL, monitor = RFAPI_MONITOR_VPN(par); monitor;) { | |
843 | ||
844 | /* | |
845 | * If new longest match for monitor prefix is the new | |
846 | * route's prefix, move monitor to new route's prefix | |
847 | */ | |
848 | if (prefix_match(&new_vpn_node->p, &monitor->p)) { | |
849 | /* detach */ | |
850 | if (mlast) { | |
851 | mlast->next = monitor->next; | |
852 | } else { | |
853 | RFAPI_MONITOR_VPN_W_ALLOC(par) = monitor->next; | |
854 | } | |
855 | ||
856 | ||
857 | /* attach */ | |
858 | monitor->next = RFAPI_MONITOR_VPN(new_vpn_node); | |
859 | RFAPI_MONITOR_VPN_W_ALLOC(new_vpn_node) = monitor; | |
860 | monitor->node = new_vpn_node; | |
861 | ||
862 | route_lock_node(new_vpn_node); /* incr refcount */ | |
863 | ||
864 | monitor = mlast ? mlast->next : RFAPI_MONITOR_VPN(par); | |
865 | ||
866 | RFAPI_CHECK_REFCOUNT(par, SAFI_MPLS_VPN, 1); | |
867 | /* decr refcount after we're done with par as this might | |
868 | * free it */ | |
869 | route_unlock_node(par); | |
870 | ||
871 | continue; | |
872 | } | |
873 | mlast = monitor; | |
874 | monitor = monitor->next; | |
875 | } | |
876 | ||
877 | RFAPI_CHECK_REFCOUNT(new_vpn_node, SAFI_MPLS_VPN, 0); | |
65efcfce LB |
878 | } |
879 | ||
880 | ||
d62a17ae | 881 | static void rfapiBgpInfoChainFree(struct bgp_info *bi) |
65efcfce | 882 | { |
d62a17ae | 883 | struct bgp_info *next; |
884 | ||
885 | while (bi) { | |
886 | ||
887 | /* | |
888 | * If there is a timer waiting to delete this bi, cancel | |
889 | * the timer and delete immediately | |
890 | */ | |
891 | if (CHECK_FLAG(bi->flags, BGP_INFO_REMOVED) | |
892 | && bi->extra->vnc.import.timer) { | |
893 | ||
894 | struct thread *t = | |
895 | (struct thread *)bi->extra->vnc.import.timer; | |
896 | struct rfapi_withdraw *wcb = t->arg; | |
897 | ||
898 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
899 | thread_cancel(t); | |
900 | } | |
901 | ||
902 | next = bi->next; | |
903 | bi->next = NULL; | |
904 | rfapiBgpInfoFree(bi); | |
905 | bi = next; | |
906 | } | |
65efcfce LB |
907 | } |
908 | ||
d62a17ae | 909 | static void rfapiImportTableFlush(struct rfapi_import_table *it) |
65efcfce | 910 | { |
d62a17ae | 911 | afi_t afi; |
912 | ||
913 | /* | |
914 | * Free ecommunity | |
915 | */ | |
916 | ecommunity_free(&it->rt_import_list); | |
917 | it->rt_import_list = NULL; | |
918 | ||
919 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
920 | ||
921 | struct route_node *rn; | |
922 | ||
923 | for (rn = route_top(it->imported_vpn[afi]); rn; | |
924 | rn = route_next(rn)) { | |
925 | /* | |
926 | * Each route_node has: | |
927 | * aggregate: points to rfapi_it_extra with monitor | |
928 | * chain(s) | |
929 | * info: points to chain of bgp_info | |
930 | */ | |
931 | /* free bgp_info and its children */ | |
932 | rfapiBgpInfoChainFree(rn->info); | |
933 | rn->info = NULL; | |
934 | ||
935 | rfapiMonitorExtraFlush(SAFI_MPLS_VPN, rn); | |
936 | } | |
937 | ||
938 | for (rn = route_top(it->imported_encap[afi]); rn; | |
939 | rn = route_next(rn)) { | |
940 | /* free bgp_info and its children */ | |
941 | rfapiBgpInfoChainFree(rn->info); | |
942 | rn->info = NULL; | |
943 | ||
944 | rfapiMonitorExtraFlush(SAFI_ENCAP, rn); | |
945 | } | |
946 | ||
947 | route_table_finish(it->imported_vpn[afi]); | |
948 | route_table_finish(it->imported_encap[afi]); | |
949 | } | |
950 | if (it->monitor_exterior_orphans) { | |
951 | skiplist_free(it->monitor_exterior_orphans); | |
952 | } | |
65efcfce LB |
953 | } |
954 | ||
d62a17ae | 955 | void rfapiImportTableRefDelByIt(struct bgp *bgp, |
956 | struct rfapi_import_table *it_target) | |
65efcfce | 957 | { |
d62a17ae | 958 | struct rfapi *h; |
959 | struct rfapi_import_table *it; | |
960 | struct rfapi_import_table *prev = NULL; | |
961 | ||
962 | assert(it_target); | |
963 | ||
964 | h = bgp->rfapi; | |
965 | assert(h); | |
966 | ||
967 | for (it = h->imports; it; prev = it, it = it->next) { | |
968 | if (it == it_target) | |
969 | break; | |
970 | } | |
971 | ||
972 | assert(it); | |
973 | assert(it->refcount); | |
974 | ||
975 | it->refcount -= 1; | |
976 | ||
977 | if (!it->refcount) { | |
978 | if (prev) { | |
979 | prev->next = it->next; | |
980 | } else { | |
981 | h->imports = it->next; | |
982 | } | |
983 | rfapiImportTableFlush(it); | |
984 | XFREE(MTYPE_RFAPI_IMPORTTABLE, it); | |
985 | } | |
65efcfce LB |
986 | } |
987 | ||
988 | #if RFAPI_REQUIRE_ENCAP_BEEC | |
989 | /* | |
990 | * Look for magic BGP Encapsulation Extended Community value | |
991 | * Format in RFC 5512 Sect. 4.5 | |
992 | */ | |
d62a17ae | 993 | static int rfapiEcommunitiesMatchBeec(struct ecommunity *ecom, |
994 | bgp_encap_types type) | |
65efcfce | 995 | { |
d62a17ae | 996 | int i; |
65efcfce | 997 | |
d62a17ae | 998 | if (!ecom) |
999 | return 0; | |
65efcfce | 1000 | |
d62a17ae | 1001 | for (i = 0; i < (ecom->size * ECOMMUNITY_SIZE); i += ECOMMUNITY_SIZE) { |
65efcfce | 1002 | |
d62a17ae | 1003 | uint8_t *ep; |
65efcfce | 1004 | |
d62a17ae | 1005 | ep = ecom->val + i; |
65efcfce | 1006 | |
d62a17ae | 1007 | if (ep[0] == ECOMMUNITY_ENCODE_OPAQUE |
1008 | && ep[1] == ECOMMUNITY_OPAQUE_SUBTYPE_ENCAP | |
1009 | && ep[6] == ((type && 0xff00) >> 8) | |
1010 | && ep[7] == (type & 0xff)) { | |
65efcfce | 1011 | |
d62a17ae | 1012 | return 1; |
1013 | } | |
1014 | } | |
1015 | return 0; | |
65efcfce LB |
1016 | } |
1017 | #endif | |
1018 | ||
d62a17ae | 1019 | int rfapiEcommunitiesIntersect(struct ecommunity *e1, struct ecommunity *e2) |
65efcfce | 1020 | { |
d62a17ae | 1021 | int i, j; |
1022 | ||
1023 | if (!e1 || !e2) | |
1024 | return 0; | |
1025 | ||
1026 | { | |
1027 | char *s1, *s2; | |
1028 | s1 = ecommunity_ecom2str(e1, ECOMMUNITY_FORMAT_DISPLAY, 0); | |
1029 | s2 = ecommunity_ecom2str(e2, ECOMMUNITY_FORMAT_DISPLAY, 0); | |
1030 | vnc_zlog_debug_verbose("%s: e1[%s], e2[%s]", __func__, s1, s2); | |
1031 | XFREE(MTYPE_ECOMMUNITY_STR, s1); | |
1032 | XFREE(MTYPE_ECOMMUNITY_STR, s2); | |
1033 | } | |
1034 | ||
1035 | for (i = 0; i < e1->size; ++i) { | |
1036 | for (j = 0; j < e2->size; ++j) { | |
1037 | if (!memcmp(e1->val + (i * ECOMMUNITY_SIZE), | |
1038 | e2->val + (j * ECOMMUNITY_SIZE), | |
1039 | ECOMMUNITY_SIZE)) { | |
1040 | ||
1041 | return 1; | |
1042 | } | |
1043 | } | |
1044 | } | |
1045 | return 0; | |
65efcfce LB |
1046 | } |
1047 | ||
d62a17ae | 1048 | int rfapiEcommunityGetLNI(struct ecommunity *ecom, uint32_t *lni) |
65efcfce | 1049 | { |
d62a17ae | 1050 | if (ecom) { |
1051 | int i; | |
1052 | for (i = 0; i < ecom->size; ++i) { | |
1053 | uint8_t *p = ecom->val + (i * ECOMMUNITY_SIZE); | |
1054 | ||
1055 | if ((*(p + 0) == 0x00) && (*(p + 1) == 0x02)) { | |
1056 | ||
1057 | *lni = (*(p + 5) << 16) | (*(p + 6) << 8) | |
1058 | | (*(p + 7)); | |
1059 | return 0; | |
1060 | } | |
1061 | } | |
1062 | } | |
1063 | return ENOENT; | |
65efcfce LB |
1064 | } |
1065 | ||
d62a17ae | 1066 | int rfapiEcommunityGetEthernetTag(struct ecommunity *ecom, uint16_t *tag_id) |
79799987 | 1067 | { |
d62a17ae | 1068 | struct bgp *bgp = bgp_get_default(); |
1069 | *tag_id = 0; /* default to untagged */ | |
1070 | if (ecom) { | |
1071 | int i; | |
1072 | for (i = 0; i < ecom->size; ++i) { | |
1073 | as_t as = 0; | |
1074 | int encode = 0; | |
1075 | uint8_t *p = ecom->val + (i * ECOMMUNITY_SIZE); | |
1076 | ||
1077 | /* High-order octet of type. */ | |
1078 | encode = *p++; | |
1079 | ||
1080 | if (*p++ == ECOMMUNITY_ROUTE_TARGET) { | |
1081 | if (encode == ECOMMUNITY_ENCODE_AS4) { | |
937652c6 | 1082 | p = ptr_get_be32(p, &as); |
d62a17ae | 1083 | } else if (encode == ECOMMUNITY_ENCODE_AS) { |
1084 | as = (*p++ << 8); | |
1085 | as |= (*p++); | |
996c9314 LB |
1086 | p += 2; /* skip next two, tag/vid |
1087 | always in lowest bytes */ | |
d62a17ae | 1088 | } |
1089 | if (as == bgp->as) { | |
1090 | *tag_id = *p++ << 8; | |
1091 | *tag_id |= (*p++); | |
1092 | return 0; | |
1093 | } | |
1094 | } | |
1095 | } | |
1096 | } | |
1097 | return ENOENT; | |
79799987 LB |
1098 | } |
1099 | ||
d62a17ae | 1100 | static int rfapiVpnBiNhEqualsPt(struct bgp_info *bi, struct rfapi_ip_addr *hpt) |
65efcfce | 1101 | { |
d62a17ae | 1102 | uint8_t family; |
65efcfce | 1103 | |
d62a17ae | 1104 | if (!hpt || !bi) |
1105 | return 0; | |
65efcfce | 1106 | |
d62a17ae | 1107 | family = BGP_MP_NEXTHOP_FAMILY(bi->attr->mp_nexthop_len); |
65efcfce | 1108 | |
d62a17ae | 1109 | if (hpt->addr_family != family) |
1110 | return 0; | |
65efcfce | 1111 | |
d62a17ae | 1112 | switch (family) { |
1113 | case AF_INET: | |
1114 | if (bi->attr->mp_nexthop_global_in.s_addr | |
1115 | != hpt->addr.v4.s_addr) | |
1116 | return 0; | |
1117 | break; | |
65efcfce | 1118 | |
d62a17ae | 1119 | case AF_INET6: |
1120 | if (IPV6_ADDR_CMP(&bi->attr->mp_nexthop_global, &hpt->addr.v6)) | |
1121 | return 0; | |
1122 | break; | |
65efcfce | 1123 | |
d62a17ae | 1124 | default: |
1125 | return 0; | |
1126 | break; | |
1127 | } | |
65efcfce | 1128 | |
d62a17ae | 1129 | return 1; |
65efcfce LB |
1130 | } |
1131 | ||
1132 | ||
1133 | /* | |
1134 | * Compare 2 VPN BIs. Return true if they have the same VN and UN addresses | |
1135 | */ | |
d62a17ae | 1136 | static int rfapiVpnBiSamePtUn(struct bgp_info *bi1, struct bgp_info *bi2) |
65efcfce | 1137 | { |
d62a17ae | 1138 | struct prefix pfx_un1; |
1139 | struct prefix pfx_un2; | |
1140 | ||
1141 | if (!bi1 || !bi2) | |
1142 | return 0; | |
1143 | ||
1144 | if (!bi1->attr || !bi2->attr) | |
1145 | return 0; | |
1146 | ||
1147 | /* | |
1148 | * VN address comparisons | |
1149 | */ | |
1150 | ||
1151 | if (BGP_MP_NEXTHOP_FAMILY(bi1->attr->mp_nexthop_len) | |
1152 | != BGP_MP_NEXTHOP_FAMILY(bi2->attr->mp_nexthop_len)) { | |
1153 | return 0; | |
1154 | } | |
1155 | ||
1156 | switch (BGP_MP_NEXTHOP_FAMILY(bi1->attr->mp_nexthop_len)) { | |
1157 | case AF_INET: | |
1158 | if (bi1->attr->mp_nexthop_global_in.s_addr | |
1159 | != bi2->attr->mp_nexthop_global_in.s_addr) | |
1160 | return 0; | |
1161 | break; | |
1162 | ||
1163 | case AF_INET6: | |
1164 | if (IPV6_ADDR_CMP(&bi1->attr->mp_nexthop_global, | |
1165 | &bi2->attr->mp_nexthop_global)) | |
1166 | return 0; | |
1167 | break; | |
1168 | ||
1169 | default: | |
1170 | return 0; | |
1171 | break; | |
1172 | } | |
1173 | ||
1174 | /* | |
1175 | * UN address comparisons | |
1176 | */ | |
1177 | if (rfapiGetVncTunnelUnAddr(bi1->attr, &pfx_un1)) { | |
1178 | if (bi1->extra) { | |
1179 | pfx_un1.family = bi1->extra->vnc.import.un_family; | |
1180 | switch (bi1->extra->vnc.import.un_family) { | |
1181 | case AF_INET: | |
1182 | pfx_un1.u.prefix4 = | |
1183 | bi1->extra->vnc.import.un.addr4; | |
1184 | break; | |
1185 | case AF_INET6: | |
1186 | pfx_un1.u.prefix6 = | |
1187 | bi1->extra->vnc.import.un.addr6; | |
1188 | break; | |
1189 | default: | |
1190 | pfx_un1.family = 0; | |
1191 | break; | |
1192 | } | |
1193 | } | |
1194 | } | |
1195 | ||
1196 | if (rfapiGetVncTunnelUnAddr(bi2->attr, &pfx_un2)) { | |
1197 | if (bi2->extra) { | |
1198 | pfx_un2.family = bi2->extra->vnc.import.un_family; | |
1199 | switch (bi2->extra->vnc.import.un_family) { | |
1200 | case AF_INET: | |
1201 | pfx_un2.u.prefix4 = | |
1202 | bi2->extra->vnc.import.un.addr4; | |
1203 | break; | |
1204 | case AF_INET6: | |
1205 | pfx_un2.u.prefix6 = | |
1206 | bi2->extra->vnc.import.un.addr6; | |
1207 | break; | |
1208 | default: | |
1209 | pfx_un2.family = 0; | |
1210 | break; | |
1211 | } | |
1212 | } | |
1213 | } | |
1214 | ||
1215 | if (!pfx_un1.family || !pfx_un2.family) | |
1216 | return 0; | |
1217 | ||
1218 | if (pfx_un1.family != pfx_un2.family) | |
1219 | return 0; | |
1220 | ||
1221 | switch (pfx_un1.family) { | |
1222 | case AF_INET: | |
996c9314 | 1223 | if (!IPV4_ADDR_SAME(&pfx_un1.u.prefix4, &pfx_un2.u.prefix4)) |
d62a17ae | 1224 | return 0; |
1225 | break; | |
1226 | case AF_INET6: | |
1227 | if (!IPV6_ADDR_SAME(&pfx_un1.u.prefix6, &pfx_un2.u.prefix6)) | |
1228 | return 0; | |
1229 | break; | |
1230 | } | |
1231 | ||
1232 | ||
1233 | return 1; | |
65efcfce LB |
1234 | } |
1235 | ||
d62a17ae | 1236 | uint8_t rfapiRfpCost(struct attr *attr) |
65efcfce | 1237 | { |
d62a17ae | 1238 | if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF)) { |
1239 | if (attr->local_pref > 255) { | |
1240 | return 0; | |
1241 | } | |
1242 | return 255 - attr->local_pref; | |
1243 | } | |
1244 | ||
1245 | return 255; | |
65efcfce LB |
1246 | } |
1247 | ||
1248 | /*------------------------------------------ | |
1249 | * rfapi_extract_l2o | |
1250 | * | |
d62a17ae | 1251 | * Find Layer 2 options in an option chain |
65efcfce | 1252 | * |
d62a17ae | 1253 | * input: |
65efcfce LB |
1254 | * pHop option chain |
1255 | * | |
1256 | * output: | |
1257 | * l2o layer 2 options extracted | |
1258 | * | |
1259 | * return value: | |
1260 | * 0 OK | |
1261 | * 1 no options found | |
1262 | * | |
1263 | --------------------------------------------*/ | |
d62a17ae | 1264 | int rfapi_extract_l2o( |
1265 | struct bgp_tea_options *pHop, /* chain of options */ | |
1266 | struct rfapi_l2address_option *l2o) /* return extracted value */ | |
65efcfce | 1267 | { |
d62a17ae | 1268 | struct bgp_tea_options *p; |
65efcfce | 1269 | |
d62a17ae | 1270 | for (p = pHop; p; p = p->next) { |
1271 | if ((p->type == RFAPI_VN_OPTION_TYPE_L2ADDR) | |
1272 | && (p->length >= 8)) { | |
65efcfce | 1273 | |
d62a17ae | 1274 | char *v = p->value; |
65efcfce | 1275 | |
d62a17ae | 1276 | memcpy(&l2o->macaddr, v, 6); |
65efcfce | 1277 | |
d62a17ae | 1278 | l2o->label = ((v[6] << 12) & 0xff000) |
1279 | + ((v[7] << 4) & 0xff0) | |
1280 | + ((v[8] >> 4) & 0xf); | |
65efcfce | 1281 | |
d62a17ae | 1282 | l2o->local_nve_id = (uint8_t)v[10]; |
65efcfce | 1283 | |
d62a17ae | 1284 | l2o->logical_net_id = |
1285 | (v[11] << 16) + (v[12] << 8) + (v[13] << 0); | |
65efcfce | 1286 | |
d62a17ae | 1287 | return 0; |
1288 | } | |
1289 | } | |
1290 | return 1; | |
65efcfce LB |
1291 | } |
1292 | ||
1293 | static struct rfapi_next_hop_entry * | |
d62a17ae | 1294 | rfapiRouteInfo2NextHopEntry(struct rfapi_ip_prefix *rprefix, |
1295 | struct bgp_info *bi, /* route to encode */ | |
1296 | uint32_t lifetime, /* use this in nhe */ | |
1297 | struct route_node *rn) /* req for L2 eth addr */ | |
65efcfce | 1298 | { |
d62a17ae | 1299 | struct rfapi_next_hop_entry *new; |
1300 | int have_vnc_tunnel_un = 0; | |
65efcfce LB |
1301 | |
1302 | #if DEBUG_ENCAP_MONITOR | |
d62a17ae | 1303 | vnc_zlog_debug_verbose("%s: entry, bi %p, rn %p", __func__, bi, rn); |
65efcfce LB |
1304 | #endif |
1305 | ||
d62a17ae | 1306 | new = XCALLOC(MTYPE_RFAPI_NEXTHOP, sizeof(struct rfapi_next_hop_entry)); |
1307 | assert(new); | |
1308 | ||
1309 | new->prefix = *rprefix; | |
1310 | ||
1311 | if (bi->extra | |
1312 | && decode_rd_type(bi->extra->vnc.import.rd.val) | |
1313 | == RD_TYPE_VNC_ETH) { | |
1314 | /* ethernet */ | |
1315 | ||
1316 | struct rfapi_vn_option *vo; | |
1317 | ||
1318 | vo = XCALLOC(MTYPE_RFAPI_VN_OPTION, | |
1319 | sizeof(struct rfapi_vn_option)); | |
1320 | assert(vo); | |
1321 | ||
1322 | vo->type = RFAPI_VN_OPTION_TYPE_L2ADDR; | |
1323 | ||
1324 | memcpy(&vo->v.l2addr.macaddr, &rn->p.u.prefix_eth.octet, | |
28328ea9 | 1325 | ETH_ALEN); |
d62a17ae | 1326 | /* only low 3 bytes of this are significant */ |
1327 | if (bi->attr) { | |
1328 | (void)rfapiEcommunityGetLNI( | |
1329 | bi->attr->ecommunity, | |
1330 | &vo->v.l2addr.logical_net_id); | |
1331 | (void)rfapiEcommunityGetEthernetTag( | |
1332 | bi->attr->ecommunity, &vo->v.l2addr.tag_id); | |
1333 | } | |
1334 | ||
1335 | /* local_nve_id comes from lower byte of RD type */ | |
1336 | vo->v.l2addr.local_nve_id = bi->extra->vnc.import.rd.val[1]; | |
1337 | ||
1338 | /* label comes from MP_REACH_NLRI label */ | |
317f1fe0 | 1339 | vo->v.l2addr.label = decode_label(&bi->extra->label[0]); |
d62a17ae | 1340 | |
1341 | new->vn_options = vo; | |
1342 | ||
1343 | /* | |
1344 | * If there is an auxiliary prefix (i.e., host IP address), | |
1345 | * use it as the nexthop prefix instead of the query prefix | |
1346 | */ | |
1347 | if (bi->extra->vnc.import.aux_prefix.family) { | |
1348 | rfapiQprefix2Rprefix(&bi->extra->vnc.import.aux_prefix, | |
1349 | &new->prefix); | |
1350 | } | |
1351 | } | |
1352 | ||
1353 | if (bi->attr) { | |
1354 | bgp_encap_types tun_type; | |
1355 | new->prefix.cost = rfapiRfpCost(bi->attr); | |
1356 | ||
1357 | struct bgp_attr_encap_subtlv *pEncap; | |
1358 | ||
1359 | switch (BGP_MP_NEXTHOP_FAMILY(bi->attr->mp_nexthop_len)) { | |
1360 | case AF_INET: | |
1361 | new->vn_address.addr_family = AF_INET; | |
1362 | new->vn_address.addr.v4 = | |
1363 | bi->attr->mp_nexthop_global_in; | |
1364 | break; | |
1365 | ||
1366 | case AF_INET6: | |
1367 | new->vn_address.addr_family = AF_INET6; | |
1368 | new->vn_address.addr.v6 = bi->attr->mp_nexthop_global; | |
1369 | break; | |
1370 | ||
1371 | default: | |
1372 | zlog_warn("%s: invalid vpn nexthop length: %d", | |
1373 | __func__, bi->attr->mp_nexthop_len); | |
1374 | rfapi_free_next_hop_list(new); | |
1375 | return NULL; | |
1376 | } | |
1377 | ||
1378 | for (pEncap = bi->attr->vnc_subtlvs; pEncap; | |
1379 | pEncap = pEncap->next) { | |
1380 | switch (pEncap->type) { | |
1381 | case BGP_VNC_SUBTLV_TYPE_LIFETIME: | |
1382 | /* use configured lifetime, not attr lifetime */ | |
1383 | break; | |
1384 | ||
1385 | default: | |
1386 | zlog_warn("%s: unknown VNC option type %d", | |
1387 | __func__, pEncap->type); | |
1388 | ||
1389 | ||
1390 | break; | |
1391 | } | |
1392 | } | |
1393 | ||
1394 | rfapiGetTunnelType(bi->attr, &tun_type); | |
1395 | if (tun_type == BGP_ENCAP_TYPE_MPLS) { | |
1396 | struct prefix p; | |
1397 | /* MPLS carries UN address in next hop */ | |
1398 | rfapiNexthop2Prefix(bi->attr, &p); | |
1399 | if (p.family != 0) { | |
1400 | rfapiQprefix2Raddr(&p, &new->un_address); | |
1401 | have_vnc_tunnel_un = 1; | |
1402 | } | |
1403 | } | |
1404 | ||
1405 | for (pEncap = bi->attr->encap_subtlvs; pEncap; | |
1406 | pEncap = pEncap->next) { | |
1407 | switch (pEncap->type) { | |
1408 | case BGP_ENCAP_SUBTLV_TYPE_REMOTE_ENDPOINT: | |
1409 | /* | |
1410 | * Overrides ENCAP UN address, if any | |
1411 | */ | |
1412 | switch (pEncap->length) { | |
1413 | ||
1414 | case 8: | |
1415 | new->un_address.addr_family = AF_INET; | |
1416 | memcpy(&new->un_address.addr.v4, | |
1417 | pEncap->value, 4); | |
1418 | have_vnc_tunnel_un = 1; | |
1419 | break; | |
1420 | ||
1421 | case 20: | |
1422 | new->un_address.addr_family = AF_INET6; | |
1423 | memcpy(&new->un_address.addr.v6, | |
1424 | pEncap->value, 16); | |
1425 | have_vnc_tunnel_un = 1; | |
1426 | break; | |
1427 | ||
1428 | default: | |
1429 | zlog_warn( | |
1430 | "%s: invalid tunnel subtlv UN addr length (%d) for bi %p", | |
1431 | __func__, pEncap->length, bi); | |
1432 | } | |
1433 | break; | |
1434 | ||
1435 | default: | |
1436 | zlog_warn( | |
1437 | "%s: unknown Encap Attribute option type %d", | |
1438 | __func__, pEncap->type); | |
1439 | ||
1440 | ||
1441 | break; | |
1442 | } | |
1443 | } | |
1444 | ||
1445 | new->un_options = rfapi_encap_tlv_to_un_option(bi->attr); | |
65efcfce LB |
1446 | |
1447 | #if DEBUG_ENCAP_MONITOR | |
d62a17ae | 1448 | vnc_zlog_debug_verbose("%s: line %d: have_vnc_tunnel_un=%d", |
1449 | __func__, __LINE__, have_vnc_tunnel_un); | |
65efcfce LB |
1450 | #endif |
1451 | ||
8cea9547 | 1452 | if (!have_vnc_tunnel_un && bi->extra) { |
d62a17ae | 1453 | /* |
1454 | * use cached UN address from ENCAP route | |
1455 | */ | |
1456 | new->un_address.addr_family = | |
1457 | bi->extra->vnc.import.un_family; | |
1458 | switch (new->un_address.addr_family) { | |
1459 | case AF_INET: | |
1460 | new->un_address.addr.v4 = | |
1461 | bi->extra->vnc.import.un.addr4; | |
1462 | break; | |
1463 | case AF_INET6: | |
1464 | new->un_address.addr.v6 = | |
1465 | bi->extra->vnc.import.un.addr6; | |
1466 | break; | |
1467 | default: | |
1468 | zlog_warn( | |
1469 | "%s: invalid UN addr family (%d) for bi %p", | |
1470 | __func__, new->un_address.addr_family, | |
1471 | bi); | |
1472 | rfapi_free_next_hop_list(new); | |
1473 | return NULL; | |
1474 | break; | |
1475 | } | |
1476 | } | |
1477 | } | |
1478 | ||
1479 | new->lifetime = lifetime; | |
1480 | return new; | |
65efcfce LB |
1481 | } |
1482 | ||
d62a17ae | 1483 | int rfapiHasNonRemovedRoutes(struct route_node *rn) |
65efcfce | 1484 | { |
d62a17ae | 1485 | struct bgp_info *bi; |
65efcfce | 1486 | |
d62a17ae | 1487 | for (bi = rn->info; bi; bi = bi->next) { |
1488 | struct prefix pfx; | |
65efcfce | 1489 | |
d62a17ae | 1490 | if (!CHECK_FLAG(bi->flags, BGP_INFO_REMOVED) |
1491 | && (bi->extra && !rfapiGetUnAddrOfVpnBi(bi, &pfx))) { | |
65efcfce | 1492 | |
d62a17ae | 1493 | return 1; |
1494 | } | |
1495 | } | |
1496 | return 0; | |
65efcfce LB |
1497 | } |
1498 | ||
1499 | #if DEBUG_IT_NODES | |
d62a17ae | 1500 | /* |
65efcfce LB |
1501 | * DEBUG FUNCTION |
1502 | */ | |
d62a17ae | 1503 | void rfapiDumpNode(struct route_node *rn) |
65efcfce | 1504 | { |
d62a17ae | 1505 | struct bgp_info *bi; |
1506 | ||
1507 | vnc_zlog_debug_verbose("%s: rn=%p", __func__, rn); | |
1508 | for (bi = rn->info; bi; bi = bi->next) { | |
1509 | struct prefix pfx; | |
1510 | int ctrc = rfapiGetUnAddrOfVpnBi(bi, &pfx); | |
1511 | int nr; | |
1512 | ||
1513 | if (!CHECK_FLAG(bi->flags, BGP_INFO_REMOVED) | |
1514 | && (bi->extra && !ctrc)) { | |
1515 | ||
1516 | nr = 1; | |
1517 | } else { | |
1518 | nr = 0; | |
1519 | } | |
1520 | ||
1521 | vnc_zlog_debug_verbose( | |
1522 | " bi=%p, nr=%d, flags=0x%x, extra=%p, ctrc=%d", bi, nr, | |
1523 | bi->flags, bi->extra, ctrc); | |
1524 | } | |
65efcfce LB |
1525 | } |
1526 | #endif | |
1527 | ||
d62a17ae | 1528 | static int rfapiNhlAddNodeRoutes( |
1529 | struct route_node *rn, /* in */ | |
1530 | struct rfapi_ip_prefix *rprefix, /* in */ | |
1531 | uint32_t lifetime, /* in */ | |
1532 | int removed, /* in */ | |
1533 | struct rfapi_next_hop_entry **head, /* in/out */ | |
1534 | struct rfapi_next_hop_entry **tail, /* in/out */ | |
1535 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
1536 | struct route_node *rfd_rib_node, /* preload this NVE rib node */ | |
1537 | struct prefix *pfx_target_original) /* query target */ | |
65efcfce | 1538 | { |
d62a17ae | 1539 | struct bgp_info *bi; |
1540 | struct rfapi_next_hop_entry *new; | |
1541 | struct prefix pfx_un; | |
1542 | struct skiplist *seen_nexthops; | |
1543 | int count = 0; | |
1544 | int is_l2 = (rn->p.family == AF_ETHERNET); | |
1545 | ||
1546 | if (rfapiRibFTDFilterRecentPrefix( | |
1547 | (struct rfapi_descriptor *)(rfd_rib_node->table->info), rn, | |
1548 | pfx_target_original)) { | |
1549 | return 0; | |
1550 | } | |
1551 | ||
1552 | seen_nexthops = | |
1553 | skiplist_new(0, vnc_prefix_cmp, (void (*)(void *))prefix_free); | |
1554 | ||
1555 | for (bi = rn->info; bi; bi = bi->next) { | |
1556 | ||
1557 | struct prefix pfx_vn; | |
1558 | struct prefix *newpfx; | |
1559 | ||
1560 | if (removed && !CHECK_FLAG(bi->flags, BGP_INFO_REMOVED)) { | |
65efcfce | 1561 | #if DEBUG_RETURNED_NHL |
d62a17ae | 1562 | vnc_zlog_debug_verbose( |
1563 | "%s: want holddown, this route not holddown, skip", | |
1564 | __func__); | |
65efcfce | 1565 | #endif |
d62a17ae | 1566 | continue; |
1567 | } | |
1568 | if (!removed && CHECK_FLAG(bi->flags, BGP_INFO_REMOVED)) { | |
1569 | continue; | |
1570 | } | |
1571 | ||
1572 | if (!bi->extra) { | |
1573 | continue; | |
1574 | } | |
1575 | ||
1576 | /* | |
1577 | * Check for excluded VN address | |
1578 | */ | |
1579 | if (rfapiVpnBiNhEqualsPt(bi, exclude_vnaddr)) | |
1580 | continue; | |
1581 | ||
1582 | /* | |
1583 | * Check for VN address (nexthop) copied already | |
1584 | */ | |
1585 | if (is_l2) { | |
1586 | /* L2 routes: semantic nexthop in aux_prefix; VN addr | |
1587 | * ain't it */ | |
1588 | pfx_vn = bi->extra->vnc.import.aux_prefix; | |
1589 | } else { | |
1590 | rfapiNexthop2Prefix(bi->attr, &pfx_vn); | |
1591 | } | |
1592 | if (!skiplist_search(seen_nexthops, &pfx_vn, NULL)) { | |
65efcfce | 1593 | #if DEBUG_RETURNED_NHL |
872ed4c7 | 1594 | char buf[PREFIX_STRLEN]; |
65efcfce | 1595 | |
872ed4c7 | 1596 | prefix2str(&pfx_vn, buf, sizeof(buf)); |
d62a17ae | 1597 | vnc_zlog_debug_verbose( |
1598 | "%s: already put VN/nexthop %s, skip", __func__, | |
1599 | buf); | |
65efcfce | 1600 | #endif |
d62a17ae | 1601 | continue; |
1602 | } | |
65efcfce | 1603 | |
d62a17ae | 1604 | if (rfapiGetUnAddrOfVpnBi(bi, &pfx_un)) { |
65efcfce | 1605 | #if DEBUG_ENCAP_MONITOR |
d62a17ae | 1606 | vnc_zlog_debug_verbose( |
1607 | "%s: failed to get UN address of this VPN bi", | |
1608 | __func__); | |
65efcfce | 1609 | #endif |
d62a17ae | 1610 | continue; |
1611 | } | |
1612 | ||
1613 | newpfx = prefix_new(); | |
1614 | *newpfx = pfx_vn; | |
1615 | skiplist_insert(seen_nexthops, newpfx, newpfx); | |
1616 | ||
1617 | new = rfapiRouteInfo2NextHopEntry(rprefix, bi, lifetime, rn); | |
1618 | if (new) { | |
1619 | if (rfapiRibPreloadBi(rfd_rib_node, &pfx_vn, &pfx_un, | |
1620 | lifetime, bi)) { | |
1621 | /* duplicate filtered by RIB */ | |
1622 | rfapi_free_next_hop_list(new); | |
1623 | new = NULL; | |
1624 | } | |
1625 | } | |
1626 | ||
1627 | if (new) { | |
1628 | if (*tail) { | |
1629 | (*tail)->next = new; | |
1630 | } else { | |
1631 | *head = new; | |
1632 | } | |
1633 | *tail = new; | |
1634 | ++count; | |
1635 | } | |
1636 | } | |
1637 | ||
1638 | skiplist_free(seen_nexthops); | |
1639 | ||
1640 | return count; | |
65efcfce LB |
1641 | } |
1642 | ||
1643 | ||
1644 | /* | |
1645 | * Breadth-first | |
1646 | * | |
1647 | * omit_node is meant for the situation where we are adding a subtree | |
1648 | * of a parent of some original requested node. The response already | |
1649 | * contains the original requested node, and we don't want to duplicate | |
1650 | * its routes in the list, so we skip it if the right or left node | |
1651 | * matches (of course, we still travel down its child subtrees). | |
1652 | */ | |
d62a17ae | 1653 | static int rfapiNhlAddSubtree( |
1654 | struct route_node *rn, /* in */ | |
1655 | uint32_t lifetime, /* in */ | |
1656 | struct rfapi_next_hop_entry **head, /* in/out */ | |
1657 | struct rfapi_next_hop_entry **tail, /* in/out */ | |
1658 | struct route_node *omit_node, /* in */ | |
1659 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
1660 | struct route_table *rfd_rib_table, /* preload here */ | |
1661 | struct prefix *pfx_target_original) /* query target */ | |
65efcfce | 1662 | { |
d62a17ae | 1663 | struct rfapi_ip_prefix rprefix; |
1664 | int rcount = 0; | |
1665 | ||
1666 | /* FIXME: need to find a better way here to work without sticking our | |
1667 | * hands in node->link */ | |
1668 | if (rn->l_left && rn->l_left != omit_node) { | |
1669 | if (rn->l_left->info) { | |
1670 | int count = 0; | |
1671 | struct route_node *rib_rn = NULL; | |
1672 | ||
1673 | rfapiQprefix2Rprefix(&rn->l_left->p, &rprefix); | |
1674 | if (rfd_rib_table) { | |
1675 | rib_rn = route_node_get(rfd_rib_table, | |
1676 | &rn->l_left->p); | |
1677 | } | |
1678 | ||
1679 | count = rfapiNhlAddNodeRoutes( | |
1680 | rn->l_left, &rprefix, lifetime, 0, head, tail, | |
1681 | exclude_vnaddr, rib_rn, pfx_target_original); | |
1682 | if (!count) { | |
1683 | count = rfapiNhlAddNodeRoutes( | |
1684 | rn->l_left, &rprefix, lifetime, 1, head, | |
1685 | tail, exclude_vnaddr, rib_rn, | |
1686 | pfx_target_original); | |
1687 | } | |
1688 | rcount += count; | |
1689 | if (rib_rn) | |
1690 | route_unlock_node(rib_rn); | |
1691 | } | |
1692 | } | |
1693 | ||
1694 | if (rn->l_right && rn->l_right != omit_node) { | |
1695 | if (rn->l_right->info) { | |
1696 | int count = 0; | |
1697 | struct route_node *rib_rn = NULL; | |
1698 | ||
1699 | rfapiQprefix2Rprefix(&rn->l_right->p, &rprefix); | |
1700 | if (rfd_rib_table) { | |
1701 | rib_rn = route_node_get(rfd_rib_table, | |
1702 | &rn->l_right->p); | |
1703 | } | |
1704 | count = rfapiNhlAddNodeRoutes( | |
1705 | rn->l_right, &rprefix, lifetime, 0, head, tail, | |
1706 | exclude_vnaddr, rib_rn, pfx_target_original); | |
1707 | if (!count) { | |
1708 | count = rfapiNhlAddNodeRoutes( | |
1709 | rn->l_right, &rprefix, lifetime, 1, | |
1710 | head, tail, exclude_vnaddr, rib_rn, | |
1711 | pfx_target_original); | |
1712 | } | |
1713 | rcount += count; | |
1714 | if (rib_rn) | |
1715 | route_unlock_node(rib_rn); | |
1716 | } | |
1717 | } | |
1718 | ||
1719 | if (rn->l_left) { | |
1720 | rcount += rfapiNhlAddSubtree( | |
1721 | rn->l_left, lifetime, head, tail, omit_node, | |
1722 | exclude_vnaddr, rfd_rib_table, pfx_target_original); | |
1723 | } | |
1724 | if (rn->l_right) { | |
1725 | rcount += rfapiNhlAddSubtree( | |
1726 | rn->l_right, lifetime, head, tail, omit_node, | |
1727 | exclude_vnaddr, rfd_rib_table, pfx_target_original); | |
1728 | } | |
1729 | ||
1730 | return rcount; | |
65efcfce LB |
1731 | } |
1732 | ||
1733 | /* | |
1734 | * Implementation of ROUTE_LIST(node) from RFAPI-Import-Event-Handling.txt | |
1735 | * | |
1736 | * Construct an rfapi nexthop list based on the routes attached to | |
1737 | * the specified node. | |
1738 | * | |
1739 | * If there are any routes that do NOT have BGP_INFO_REMOVED set, | |
1740 | * return those only. If there are ONLY routes with BGP_INFO_REMOVED, | |
1741 | * then return those, and also include all the non-removed routes from the | |
1742 | * next less-specific node (i.e., this node's parent) at the end. | |
1743 | */ | |
d62a17ae | 1744 | struct rfapi_next_hop_entry *rfapiRouteNode2NextHopList( |
1745 | struct route_node *rn, uint32_t lifetime, /* put into nexthop entries */ | |
1746 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
1747 | struct route_table *rfd_rib_table, /* preload here */ | |
1748 | struct prefix *pfx_target_original) /* query target */ | |
65efcfce | 1749 | { |
d62a17ae | 1750 | struct rfapi_ip_prefix rprefix; |
1751 | struct rfapi_next_hop_entry *answer = NULL; | |
1752 | struct rfapi_next_hop_entry *last = NULL; | |
1753 | struct route_node *parent; | |
1754 | int count = 0; | |
1755 | struct route_node *rib_rn; | |
65efcfce LB |
1756 | |
1757 | #if DEBUG_RETURNED_NHL | |
d62a17ae | 1758 | { |
872ed4c7 | 1759 | char buf[PREFIX_STRLEN]; |
d62a17ae | 1760 | |
872ed4c7 | 1761 | prefix2str(&rn->p, buf, sizeof(buf)); |
d62a17ae | 1762 | vnc_zlog_debug_verbose("%s: called with node pfx=%s", __func__, |
1763 | buf); | |
1764 | } | |
1765 | rfapiDebugBacktrace(); | |
65efcfce LB |
1766 | #endif |
1767 | ||
d62a17ae | 1768 | rfapiQprefix2Rprefix(&rn->p, &rprefix); |
1769 | ||
1770 | rib_rn = rfd_rib_table ? route_node_get(rfd_rib_table, &rn->p) : NULL; | |
1771 | ||
1772 | /* | |
1773 | * Add non-withdrawn routes at this node | |
1774 | */ | |
1775 | count = rfapiNhlAddNodeRoutes(rn, &rprefix, lifetime, 0, &answer, &last, | |
1776 | exclude_vnaddr, rib_rn, | |
1777 | pfx_target_original); | |
1778 | ||
1779 | /* | |
1780 | * If the list has at least one entry, it's finished | |
1781 | */ | |
1782 | if (count) { | |
1783 | count += rfapiNhlAddSubtree(rn, lifetime, &answer, &last, NULL, | |
1784 | exclude_vnaddr, rfd_rib_table, | |
1785 | pfx_target_original); | |
1786 | vnc_zlog_debug_verbose("%s: %d nexthops, answer=%p", __func__, | |
1787 | count, answer); | |
65efcfce | 1788 | #if DEBUG_RETURNED_NHL |
d62a17ae | 1789 | rfapiPrintNhl(NULL, answer); |
65efcfce | 1790 | #endif |
d62a17ae | 1791 | if (rib_rn) |
1792 | route_unlock_node(rib_rn); | |
1793 | return answer; | |
1794 | } | |
1795 | ||
1796 | /* | |
1797 | * Add withdrawn routes at this node | |
1798 | */ | |
1799 | count = rfapiNhlAddNodeRoutes(rn, &rprefix, lifetime, 1, &answer, &last, | |
1800 | exclude_vnaddr, rib_rn, | |
1801 | pfx_target_original); | |
1802 | if (rib_rn) | |
1803 | route_unlock_node(rib_rn); | |
1804 | ||
1805 | // rfapiPrintNhl(NULL, answer); | |
1806 | ||
1807 | /* | |
1808 | * walk up the tree until we find a node with non-deleted | |
1809 | * routes, then add them | |
1810 | */ | |
1811 | for (parent = rn->parent; parent; parent = parent->parent) { | |
1812 | if (rfapiHasNonRemovedRoutes(parent)) { | |
1813 | break; | |
1814 | } | |
1815 | } | |
1816 | ||
1817 | /* | |
1818 | * Add non-withdrawn routes from less-specific prefix | |
1819 | */ | |
1820 | if (parent) { | |
1821 | rib_rn = rfd_rib_table | |
1822 | ? route_node_get(rfd_rib_table, &parent->p) | |
1823 | : NULL; | |
1824 | rfapiQprefix2Rprefix(&parent->p, &rprefix); | |
1825 | count += rfapiNhlAddNodeRoutes(parent, &rprefix, lifetime, 0, | |
1826 | &answer, &last, exclude_vnaddr, | |
1827 | rib_rn, pfx_target_original); | |
1828 | count += rfapiNhlAddSubtree(parent, lifetime, &answer, &last, | |
1829 | rn, exclude_vnaddr, rfd_rib_table, | |
1830 | pfx_target_original); | |
1831 | if (rib_rn) | |
1832 | route_unlock_node(rib_rn); | |
1833 | } else { | |
1834 | /* | |
1835 | * There is no parent with non-removed routes. Still need to | |
1836 | * add subtree of original node if it contributed routes to the | |
1837 | * answer. | |
1838 | */ | |
1839 | if (count) | |
1840 | count += rfapiNhlAddSubtree(rn, lifetime, &answer, | |
1841 | &last, rn, exclude_vnaddr, | |
1842 | rfd_rib_table, | |
1843 | pfx_target_original); | |
1844 | } | |
1845 | ||
1846 | vnc_zlog_debug_verbose("%s: %d nexthops, answer=%p", __func__, count, | |
1847 | answer); | |
65efcfce | 1848 | #if DEBUG_RETURNED_NHL |
d62a17ae | 1849 | rfapiPrintNhl(NULL, answer); |
65efcfce | 1850 | #endif |
d62a17ae | 1851 | return answer; |
65efcfce LB |
1852 | } |
1853 | ||
1854 | /* | |
1855 | * Construct nexthop list of all routes in table | |
1856 | */ | |
d62a17ae | 1857 | struct rfapi_next_hop_entry *rfapiRouteTable2NextHopList( |
1858 | struct route_table *rt, | |
1859 | uint32_t lifetime, /* put into nexthop entries */ | |
1860 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
1861 | struct route_table *rfd_rib_table, /* preload this NVE rib table */ | |
1862 | struct prefix *pfx_target_original) /* query target */ | |
65efcfce | 1863 | { |
d62a17ae | 1864 | struct route_node *rn; |
1865 | struct rfapi_next_hop_entry *biglist = NULL; | |
1866 | struct rfapi_next_hop_entry *nhl; | |
1867 | struct rfapi_next_hop_entry *tail = NULL; | |
1868 | int count = 0; | |
1869 | ||
1870 | for (rn = route_top(rt); rn; rn = route_next(rn)) { | |
1871 | ||
1872 | nhl = rfapiRouteNode2NextHopList(rn, lifetime, exclude_vnaddr, | |
1873 | rfd_rib_table, | |
1874 | pfx_target_original); | |
1875 | if (!tail) { | |
1876 | tail = biglist = nhl; | |
1877 | if (tail) | |
1878 | count = 1; | |
1879 | } else { | |
1880 | tail->next = nhl; | |
1881 | } | |
1882 | if (tail) { | |
1883 | while (tail->next) { | |
1884 | ++count; | |
1885 | tail = tail->next; | |
1886 | } | |
1887 | } | |
1888 | } | |
1889 | ||
1890 | vnc_zlog_debug_verbose("%s: returning %d routes", __func__, count); | |
1891 | return biglist; | |
65efcfce LB |
1892 | } |
1893 | ||
d62a17ae | 1894 | struct rfapi_next_hop_entry *rfapiEthRouteNode2NextHopList( |
1895 | struct route_node *rn, struct rfapi_ip_prefix *rprefix, | |
1896 | uint32_t lifetime, /* put into nexthop entries */ | |
1897 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
1898 | struct route_table *rfd_rib_table, /* preload NVE rib table */ | |
1899 | struct prefix *pfx_target_original) /* query target */ | |
65efcfce | 1900 | { |
d62a17ae | 1901 | int count = 0; |
1902 | struct rfapi_next_hop_entry *answer = NULL; | |
1903 | struct rfapi_next_hop_entry *last = NULL; | |
1904 | struct route_node *rib_rn; | |
65efcfce | 1905 | |
d62a17ae | 1906 | rib_rn = rfd_rib_table ? route_node_get(rfd_rib_table, &rn->p) : NULL; |
65efcfce | 1907 | |
d62a17ae | 1908 | count = rfapiNhlAddNodeRoutes(rn, rprefix, lifetime, 0, &answer, &last, |
1909 | NULL, rib_rn, pfx_target_original); | |
65efcfce LB |
1910 | |
1911 | #if DEBUG_ENCAP_MONITOR | |
d62a17ae | 1912 | vnc_zlog_debug_verbose("%s: node %p: %d non-holddown routes", __func__, |
1913 | rn, count); | |
65efcfce LB |
1914 | #endif |
1915 | ||
d62a17ae | 1916 | if (!count) { |
1917 | count = rfapiNhlAddNodeRoutes(rn, rprefix, lifetime, 1, &answer, | |
1918 | &last, exclude_vnaddr, rib_rn, | |
1919 | pfx_target_original); | |
1920 | vnc_zlog_debug_verbose("%s: node %p: %d holddown routes", | |
1921 | __func__, rn, count); | |
1922 | } | |
65efcfce | 1923 | |
d62a17ae | 1924 | if (rib_rn) |
1925 | route_unlock_node(rib_rn); | |
65efcfce LB |
1926 | |
1927 | #if DEBUG_RETURNED_NHL | |
d62a17ae | 1928 | rfapiPrintNhl(NULL, answer); |
65efcfce LB |
1929 | #endif |
1930 | ||
d62a17ae | 1931 | return answer; |
65efcfce LB |
1932 | } |
1933 | ||
1934 | ||
1935 | /* | |
1936 | * Construct nexthop list of all routes in table | |
1937 | */ | |
d62a17ae | 1938 | struct rfapi_next_hop_entry *rfapiEthRouteTable2NextHopList( |
1939 | uint32_t logical_net_id, struct rfapi_ip_prefix *rprefix, | |
1940 | uint32_t lifetime, /* put into nexthop entries */ | |
1941 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
1942 | struct route_table *rfd_rib_table, /* preload NVE rib node */ | |
1943 | struct prefix *pfx_target_original) /* query target */ | |
65efcfce | 1944 | { |
d62a17ae | 1945 | struct rfapi_import_table *it; |
1946 | struct bgp *bgp = bgp_get_default(); | |
1947 | struct route_table *rt; | |
1948 | struct route_node *rn; | |
1949 | struct rfapi_next_hop_entry *biglist = NULL; | |
1950 | struct rfapi_next_hop_entry *nhl; | |
1951 | struct rfapi_next_hop_entry *tail = NULL; | |
1952 | int count = 0; | |
1953 | ||
1954 | ||
1955 | it = rfapiMacImportTableGet(bgp, logical_net_id); | |
1956 | rt = it->imported_vpn[AFI_L2VPN]; | |
1957 | ||
1958 | for (rn = route_top(rt); rn; rn = route_next(rn)) { | |
1959 | ||
1960 | nhl = rfapiEthRouteNode2NextHopList( | |
1961 | rn, rprefix, lifetime, exclude_vnaddr, rfd_rib_table, | |
1962 | pfx_target_original); | |
1963 | if (!tail) { | |
1964 | tail = biglist = nhl; | |
1965 | if (tail) | |
1966 | count = 1; | |
1967 | } else { | |
1968 | tail->next = nhl; | |
1969 | } | |
1970 | if (tail) { | |
1971 | while (tail->next) { | |
1972 | ++count; | |
1973 | tail = tail->next; | |
1974 | } | |
1975 | } | |
1976 | } | |
1977 | ||
1978 | vnc_zlog_debug_verbose("%s: returning %d routes", __func__, count); | |
1979 | return biglist; | |
65efcfce LB |
1980 | } |
1981 | ||
1982 | /* | |
1983 | * Insert a new bi to the imported route table node, | |
1984 | * keeping the list of BIs sorted best route first | |
1985 | */ | |
d62a17ae | 1986 | static void rfapiBgpInfoAttachSorted(struct route_node *rn, |
1987 | struct bgp_info *info_new, afi_t afi, | |
1988 | safi_t safi) | |
65efcfce | 1989 | { |
d62a17ae | 1990 | struct bgp *bgp; |
1991 | struct bgp_info *prev; | |
1992 | struct bgp_info *next; | |
1993 | char pfx_buf[PREFIX2STR_BUFFER]; | |
1994 | ||
1995 | ||
1996 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
1997 | ||
1998 | if (VNC_DEBUG(IMPORT_BI_ATTACH)) { | |
1999 | vnc_zlog_debug_verbose("%s: info_new->peer=%p", __func__, | |
2000 | info_new->peer); | |
2001 | vnc_zlog_debug_verbose("%s: info_new->peer->su_remote=%p", | |
2002 | __func__, info_new->peer->su_remote); | |
2003 | } | |
2004 | ||
2005 | for (prev = NULL, next = rn->info; next; | |
2006 | prev = next, next = next->next) { | |
9d303b37 DL |
2007 | if (!bgp || (!CHECK_FLAG(info_new->flags, BGP_INFO_REMOVED) |
2008 | && CHECK_FLAG(next->flags, BGP_INFO_REMOVED)) | |
d62a17ae | 2009 | || bgp_info_cmp_compatible(bgp, info_new, next, pfx_buf, |
2010 | afi, safi) | |
2011 | == -1) { /* -1 if 1st is better */ | |
2012 | break; | |
2013 | } | |
2014 | } | |
2015 | vnc_zlog_debug_verbose("%s: prev=%p, next=%p", __func__, prev, next); | |
2016 | if (prev) { | |
2017 | prev->next = info_new; | |
2018 | } else { | |
2019 | rn->info = info_new; | |
2020 | } | |
2021 | info_new->prev = prev; | |
2022 | info_new->next = next; | |
2023 | if (next) | |
2024 | next->prev = info_new; | |
2025 | bgp_attr_intern(info_new->attr); | |
65efcfce LB |
2026 | } |
2027 | ||
d62a17ae | 2028 | static void rfapiBgpInfoDetach(struct route_node *rn, struct bgp_info *bi) |
65efcfce | 2029 | { |
d62a17ae | 2030 | /* |
2031 | * Remove the route (doubly-linked) | |
2032 | */ | |
2033 | // bgp_attr_unintern (&bi->attr); | |
2034 | if (bi->next) | |
2035 | bi->next->prev = bi->prev; | |
2036 | if (bi->prev) | |
2037 | bi->prev->next = bi->next; | |
2038 | else | |
2039 | rn->info = bi->next; | |
65efcfce LB |
2040 | } |
2041 | ||
2042 | /* | |
2043 | * For L3-indexed import tables | |
2044 | */ | |
d62a17ae | 2045 | static int rfapi_bi_peer_rd_cmp(void *b1, void *b2) |
65efcfce | 2046 | { |
d62a17ae | 2047 | struct bgp_info *bi1 = b1; |
2048 | struct bgp_info *bi2 = b2; | |
2049 | ||
2050 | /* | |
2051 | * Compare peers | |
2052 | */ | |
2053 | if (bi1->peer < bi2->peer) | |
2054 | return -1; | |
2055 | if (bi1->peer > bi2->peer) | |
2056 | return 1; | |
2057 | ||
2058 | /* | |
2059 | * compare RDs | |
2060 | */ | |
2061 | return vnc_prefix_cmp((struct prefix *)&bi1->extra->vnc.import.rd, | |
2062 | (struct prefix *)&bi2->extra->vnc.import.rd); | |
65efcfce LB |
2063 | } |
2064 | ||
2065 | /* | |
2066 | * For L2-indexed import tables | |
2067 | * The BIs in these tables should ALWAYS have an aux_prefix set because | |
2068 | * they arrive via IPv4 or IPv6 advertisements. | |
2069 | */ | |
d62a17ae | 2070 | static int rfapi_bi_peer_rd_aux_cmp(void *b1, void *b2) |
65efcfce | 2071 | { |
d62a17ae | 2072 | struct bgp_info *bi1 = b1; |
2073 | struct bgp_info *bi2 = b2; | |
2074 | int rc; | |
2075 | ||
2076 | /* | |
2077 | * Compare peers | |
2078 | */ | |
2079 | if (bi1->peer < bi2->peer) | |
2080 | return -1; | |
2081 | if (bi1->peer > bi2->peer) | |
2082 | return 1; | |
2083 | ||
2084 | /* | |
2085 | * compare RDs | |
2086 | */ | |
2087 | rc = vnc_prefix_cmp((struct prefix *)&bi1->extra->vnc.import.rd, | |
2088 | (struct prefix *)&bi2->extra->vnc.import.rd); | |
2089 | if (rc) { | |
2090 | return rc; | |
2091 | } | |
2092 | ||
2093 | /* | |
2094 | * L2 import tables can have multiple entries with the | |
2095 | * same MAC address, same RD, but different L3 addresses. | |
2096 | * | |
2097 | * Use presence of aux_prefix with AF=ethernet and prefixlen=1 | |
2098 | * as magic value to signify explicit wildcarding of the aux_prefix. | |
2099 | * This magic value will not appear in bona fide bi entries in | |
2100 | * the import table, but is allowed in the "fake" bi used to | |
2101 | * probe the table when searching. (We have to test both b1 and b2 | |
2102 | * because there is no guarantee of the order the test key and | |
2103 | * the real key will be passed) | |
2104 | */ | |
2105 | if ((bi1->extra->vnc.import.aux_prefix.family == AF_ETHERNET | |
2106 | && (bi1->extra->vnc.import.aux_prefix.prefixlen == 1)) | |
2107 | || (bi2->extra->vnc.import.aux_prefix.family == AF_ETHERNET | |
2108 | && (bi2->extra->vnc.import.aux_prefix.prefixlen == 1))) { | |
2109 | ||
2110 | /* | |
2111 | * wildcard aux address specified | |
2112 | */ | |
2113 | return 0; | |
2114 | } | |
2115 | ||
2116 | return vnc_prefix_cmp(&bi1->extra->vnc.import.aux_prefix, | |
2117 | &bi2->extra->vnc.import.aux_prefix); | |
65efcfce LB |
2118 | } |
2119 | ||
2120 | ||
2121 | /* | |
2122 | * Index on RD and Peer | |
2123 | */ | |
d62a17ae | 2124 | static void rfapiItBiIndexAdd(struct route_node *rn, /* Import table VPN node */ |
2125 | struct bgp_info *bi) /* new BI */ | |
65efcfce | 2126 | { |
d62a17ae | 2127 | struct skiplist *sl; |
2128 | ||
2129 | assert(rn); | |
2130 | assert(bi); | |
2131 | assert(bi->extra); | |
2132 | ||
2133 | { | |
06b9f471 DS |
2134 | char buf[RD_ADDRSTRLEN]; |
2135 | ||
d62a17ae | 2136 | vnc_zlog_debug_verbose("%s: bi %p, peer %p, rd %s", __func__, |
06b9f471 DS |
2137 | bi, bi->peer, |
2138 | prefix_rd2str(&bi->extra->vnc.import.rd, | |
2139 | buf, sizeof(buf))); | |
d62a17ae | 2140 | } |
2141 | ||
2142 | sl = RFAPI_RDINDEX_W_ALLOC(rn); | |
2143 | if (!sl) { | |
2144 | if (AF_ETHERNET == rn->p.family) { | |
2145 | sl = skiplist_new(0, rfapi_bi_peer_rd_aux_cmp, NULL); | |
2146 | } else { | |
2147 | sl = skiplist_new(0, rfapi_bi_peer_rd_cmp, NULL); | |
2148 | } | |
2149 | RFAPI_IT_EXTRA_GET(rn)->u.vpn.idx_rd = sl; | |
2150 | route_lock_node(rn); /* for skiplist */ | |
2151 | } | |
2152 | assert(!skiplist_insert(sl, (void *)bi, (void *)bi)); | |
2153 | route_lock_node(rn); /* for skiplist entry */ | |
2154 | ||
2155 | /* NB: BIs in import tables are not refcounted */ | |
65efcfce LB |
2156 | } |
2157 | ||
d62a17ae | 2158 | static void rfapiItBiIndexDump(struct route_node *rn) |
65efcfce | 2159 | { |
d62a17ae | 2160 | struct skiplist *sl; |
2161 | void *cursor = NULL; | |
2162 | struct bgp_info *k; | |
2163 | struct bgp_info *v; | |
2164 | int rc; | |
2165 | ||
2166 | sl = RFAPI_RDINDEX(rn); | |
2167 | if (!sl) | |
2168 | return; | |
2169 | ||
2170 | for (rc = skiplist_next(sl, (void **)&k, (void **)&v, &cursor); !rc; | |
2171 | rc = skiplist_next(sl, (void **)&k, (void **)&v, &cursor)) { | |
2172 | ||
06b9f471 | 2173 | char buf[RD_ADDRSTRLEN]; |
872ed4c7 | 2174 | char buf_aux_pfx[PREFIX_STRLEN]; |
d62a17ae | 2175 | |
06b9f471 | 2176 | prefix_rd2str(&k->extra->vnc.import.rd, buf, sizeof(buf)); |
d62a17ae | 2177 | if (k->extra->vnc.import.aux_prefix.family) { |
2178 | prefix2str(&k->extra->vnc.import.aux_prefix, | |
06b9f471 DS |
2179 | buf_aux_pfx, sizeof(buf_aux_pfx)); |
2180 | } else | |
872ed4c7 | 2181 | strncpy(buf_aux_pfx, "(none)", PREFIX_STRLEN); |
d62a17ae | 2182 | |
2183 | vnc_zlog_debug_verbose("bi %p, peer %p, rd %s, aux_prefix %s", | |
2184 | k, k->peer, buf, buf_aux_pfx); | |
2185 | } | |
65efcfce LB |
2186 | } |
2187 | ||
d62a17ae | 2188 | static struct bgp_info *rfapiItBiIndexSearch( |
2189 | struct route_node *rn, /* Import table VPN node */ | |
2190 | struct prefix_rd *prd, struct peer *peer, | |
2191 | struct prefix *aux_prefix) /* optional L3 addr for L2 ITs */ | |
65efcfce | 2192 | { |
d62a17ae | 2193 | struct skiplist *sl; |
2194 | int rc; | |
2195 | struct bgp_info bi_fake; | |
2196 | struct bgp_info_extra bi_extra; | |
2197 | struct bgp_info *bi_result; | |
65efcfce | 2198 | |
d62a17ae | 2199 | sl = RFAPI_RDINDEX(rn); |
2200 | if (!sl) | |
2201 | return NULL; | |
65efcfce LB |
2202 | |
2203 | #if DEBUG_BI_SEARCH | |
d62a17ae | 2204 | { |
06b9f471 | 2205 | char buf[RD_ADDRSTRLEN]; |
872ed4c7 | 2206 | char buf_aux_pfx[PREFIX_STRLEN]; |
d62a17ae | 2207 | |
d62a17ae | 2208 | if (aux_prefix) { |
872ed4c7 DS |
2209 | prefix2str(aux_prefix, buf_aux_pfx, |
2210 | sizeof(buf_aux_pfx)); | |
06b9f471 DS |
2211 | } else |
2212 | strncpy(buf_aux_pfx, "(nil)", sizeof(buf_aux_pfx)); | |
d62a17ae | 2213 | |
2214 | vnc_zlog_debug_verbose("%s want prd=%s, peer=%p, aux_prefix=%s", | |
06b9f471 DS |
2215 | __func__, |
2216 | prefix_rd2str(prd, buf, sizeof(buf)), | |
2217 | peer, buf_aux_pfx); | |
d62a17ae | 2218 | rfapiItBiIndexDump(rn); |
2219 | } | |
65efcfce LB |
2220 | #endif |
2221 | ||
d62a17ae | 2222 | /* threshold is a WAG */ |
2223 | if (sl->count < 3) { | |
65efcfce | 2224 | #if DEBUG_BI_SEARCH |
d62a17ae | 2225 | vnc_zlog_debug_verbose("%s: short list algorithm", __func__); |
65efcfce | 2226 | #endif |
d62a17ae | 2227 | /* if short list, linear search might be faster */ |
2228 | for (bi_result = rn->info; bi_result; | |
2229 | bi_result = bi_result->next) { | |
65efcfce | 2230 | #if DEBUG_BI_SEARCH |
d62a17ae | 2231 | { |
06b9f471 DS |
2232 | char buf[RD_ADDRSTRLEN]; |
2233 | ||
d62a17ae | 2234 | vnc_zlog_debug_verbose( |
2235 | "%s: bi has prd=%s, peer=%p", __func__, | |
996c9314 LB |
2236 | prefix_rd2str(&bi_result->extra->vnc |
2237 | .import.rd, | |
2238 | buf, sizeof(buf)), | |
06b9f471 | 2239 | bi_result->peer); |
d62a17ae | 2240 | } |
65efcfce | 2241 | #endif |
d62a17ae | 2242 | if (peer == bi_result->peer |
2243 | && !prefix_cmp((struct prefix *)&bi_result->extra | |
2244 | ->vnc.import.rd, | |
2245 | (struct prefix *)prd)) { | |
65efcfce LB |
2246 | |
2247 | #if DEBUG_BI_SEARCH | |
d62a17ae | 2248 | vnc_zlog_debug_verbose( |
2249 | "%s: peer and RD same, doing aux_prefix check", | |
2250 | __func__); | |
65efcfce | 2251 | #endif |
d62a17ae | 2252 | if (!aux_prefix |
2253 | || !prefix_cmp(aux_prefix, | |
2254 | &bi_result->extra->vnc.import | |
2255 | .aux_prefix)) { | |
65efcfce LB |
2256 | |
2257 | #if DEBUG_BI_SEARCH | |
d62a17ae | 2258 | vnc_zlog_debug_verbose("%s: match", |
2259 | __func__); | |
65efcfce | 2260 | #endif |
d62a17ae | 2261 | break; |
2262 | } | |
2263 | } | |
2264 | } | |
2265 | return bi_result; | |
2266 | } | |
2267 | ||
2268 | bi_fake.peer = peer; | |
2269 | bi_fake.extra = &bi_extra; | |
2270 | bi_fake.extra->vnc.import.rd = *(struct prefix_rd *)prd; | |
2271 | if (aux_prefix) { | |
2272 | bi_fake.extra->vnc.import.aux_prefix = *aux_prefix; | |
2273 | } else { | |
2274 | /* wildcard */ | |
2275 | bi_fake.extra->vnc.import.aux_prefix.family = AF_ETHERNET; | |
2276 | bi_fake.extra->vnc.import.aux_prefix.prefixlen = 1; | |
2277 | } | |
2278 | ||
2279 | rc = skiplist_search(sl, (void *)&bi_fake, (void *)&bi_result); | |
2280 | ||
2281 | if (rc) { | |
65efcfce | 2282 | #if DEBUG_BI_SEARCH |
d62a17ae | 2283 | vnc_zlog_debug_verbose("%s: no match", __func__); |
65efcfce | 2284 | #endif |
d62a17ae | 2285 | return NULL; |
2286 | } | |
65efcfce LB |
2287 | |
2288 | #if DEBUG_BI_SEARCH | |
d62a17ae | 2289 | vnc_zlog_debug_verbose("%s: matched bi=%p", __func__, bi_result); |
65efcfce LB |
2290 | #endif |
2291 | ||
d62a17ae | 2292 | return bi_result; |
65efcfce LB |
2293 | } |
2294 | ||
d62a17ae | 2295 | static void rfapiItBiIndexDel(struct route_node *rn, /* Import table VPN node */ |
2296 | struct bgp_info *bi) /* old BI */ | |
65efcfce | 2297 | { |
d62a17ae | 2298 | struct skiplist *sl; |
2299 | int rc; | |
65efcfce | 2300 | |
d62a17ae | 2301 | { |
06b9f471 DS |
2302 | char buf[RD_ADDRSTRLEN]; |
2303 | ||
d62a17ae | 2304 | vnc_zlog_debug_verbose("%s: bi %p, peer %p, rd %s", __func__, |
06b9f471 DS |
2305 | bi, bi->peer, |
2306 | prefix_rd2str(&bi->extra->vnc.import.rd, | |
2307 | buf, sizeof(buf))); | |
d62a17ae | 2308 | } |
65efcfce | 2309 | |
d62a17ae | 2310 | sl = RFAPI_RDINDEX(rn); |
2311 | assert(sl); | |
65efcfce | 2312 | |
d62a17ae | 2313 | rc = skiplist_delete(sl, (void *)(bi), (void *)bi); |
2314 | if (rc) { | |
2315 | rfapiItBiIndexDump(rn); | |
2316 | } | |
2317 | assert(!rc); | |
65efcfce | 2318 | |
d62a17ae | 2319 | route_unlock_node(rn); /* for skiplist entry */ |
65efcfce | 2320 | |
d62a17ae | 2321 | /* NB: BIs in import tables are not refcounted */ |
65efcfce LB |
2322 | } |
2323 | ||
2324 | /* | |
2325 | * Add a backreference at the ENCAP node to the VPN route that | |
2326 | * refers to it | |
2327 | */ | |
d62a17ae | 2328 | static void rfapiMonitorEncapAdd(struct rfapi_import_table *import_table, |
2329 | struct prefix *p, /* VN address */ | |
2330 | struct route_node *vpn_rn, /* VPN node */ | |
2331 | struct bgp_info *vpn_bi) /* VPN bi/route */ | |
65efcfce | 2332 | { |
d62a17ae | 2333 | afi_t afi = family2afi(p->family); |
2334 | struct route_node *rn; | |
2335 | struct rfapi_monitor_encap *m; | |
2336 | ||
2337 | assert(afi); | |
2338 | rn = route_node_get(import_table->imported_encap[afi], | |
2339 | p); /* locks rn */ | |
2340 | assert(rn); | |
2341 | ||
2342 | m = XCALLOC(MTYPE_RFAPI_MONITOR_ENCAP, | |
2343 | sizeof(struct rfapi_monitor_encap)); | |
2344 | assert(m); | |
2345 | ||
2346 | m->node = vpn_rn; | |
2347 | m->bi = vpn_bi; | |
2348 | m->rn = rn; | |
2349 | ||
2350 | /* insert to encap node's list */ | |
2351 | m->next = RFAPI_MONITOR_ENCAP(rn); | |
2352 | if (m->next) | |
2353 | m->next->prev = m; | |
2354 | RFAPI_MONITOR_ENCAP_W_ALLOC(rn) = m; | |
2355 | ||
2356 | /* for easy lookup when deleting vpn route */ | |
2357 | vpn_bi->extra->vnc.import.hme = m; | |
2358 | ||
2359 | vnc_zlog_debug_verbose( | |
2360 | "%s: it=%p, vpn_bi=%p, afi=%d, encap rn=%p, setting vpn_bi->extra->vnc.import.hme=%p", | |
2361 | __func__, import_table, vpn_bi, afi, rn, m); | |
2362 | ||
2363 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, 0); | |
2364 | bgp_attr_intern(vpn_bi->attr); | |
65efcfce LB |
2365 | } |
2366 | ||
d62a17ae | 2367 | static void rfapiMonitorEncapDelete(struct bgp_info *vpn_bi) |
65efcfce | 2368 | { |
d62a17ae | 2369 | /* |
2370 | * Remove encap monitor | |
2371 | */ | |
2372 | vnc_zlog_debug_verbose("%s: vpn_bi=%p", __func__, vpn_bi); | |
2373 | if (vpn_bi->extra) { | |
2374 | struct rfapi_monitor_encap *hme = vpn_bi->extra->vnc.import.hme; | |
2375 | ||
2376 | if (hme) { | |
2377 | ||
2378 | vnc_zlog_debug_verbose("%s: hme=%p", __func__, hme); | |
2379 | ||
2380 | /* Refcount checking takes too long here */ | |
2381 | // RFAPI_CHECK_REFCOUNT(hme->rn, SAFI_ENCAP, 0); | |
2382 | if (hme->next) | |
2383 | hme->next->prev = hme->prev; | |
2384 | if (hme->prev) | |
2385 | hme->prev->next = hme->next; | |
2386 | else | |
2387 | RFAPI_MONITOR_ENCAP_W_ALLOC(hme->rn) = | |
2388 | hme->next; | |
2389 | /* Refcount checking takes too long here */ | |
2390 | // RFAPI_CHECK_REFCOUNT(hme->rn, SAFI_ENCAP, 1); | |
2391 | ||
2392 | /* see if the struct rfapi_it_extra is empty and can be | |
2393 | * freed */ | |
2394 | rfapiMonitorExtraPrune(SAFI_ENCAP, hme->rn); | |
2395 | ||
2396 | route_unlock_node(hme->rn); /* decr ref count */ | |
2397 | XFREE(MTYPE_RFAPI_MONITOR_ENCAP, hme); | |
2398 | vpn_bi->extra->vnc.import.hme = NULL; | |
2399 | } | |
2400 | } | |
65efcfce LB |
2401 | } |
2402 | ||
2403 | /* | |
2404 | * quagga lib/thread.h says this must return int even though | |
2405 | * it doesn't do anything with the return value | |
2406 | */ | |
d62a17ae | 2407 | static int rfapiWithdrawTimerVPN(struct thread *t) |
65efcfce | 2408 | { |
d62a17ae | 2409 | struct rfapi_withdraw *wcb = t->arg; |
2410 | struct bgp_info *bi = wcb->info; | |
2411 | struct bgp *bgp = bgp_get_default(); | |
2412 | ||
2413 | struct rfapi_monitor_vpn *moved; | |
2414 | afi_t afi; | |
2415 | ||
2416 | assert(wcb->node); | |
2417 | assert(bi); | |
2418 | assert(wcb->import_table); | |
2419 | assert(bi->extra); | |
2420 | ||
2421 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_MPLS_VPN, wcb->lockoffset); | |
2422 | ||
2423 | { | |
2424 | char buf[BUFSIZ]; | |
2425 | ||
2426 | vnc_zlog_debug_verbose( | |
2427 | "%s: removing bi %p at prefix %s/%d", __func__, bi, | |
2428 | rfapi_ntop(wcb->node->p.family, &wcb->node->p.u.prefix, | |
2429 | buf, BUFSIZ), | |
2430 | wcb->node->p.prefixlen); | |
2431 | } | |
2432 | ||
2433 | /* | |
2434 | * Remove the route (doubly-linked) | |
2435 | */ | |
2436 | if (CHECK_FLAG(bi->flags, BGP_INFO_VALID) | |
2437 | && VALID_INTERIOR_TYPE(bi->type)) | |
2438 | RFAPI_MONITOR_EXTERIOR(wcb->node)->valid_interior_count--; | |
2439 | ||
2440 | afi = family2afi(wcb->node->p.family); | |
2441 | wcb->import_table->holddown_count[afi] -= 1; /* keep count consistent */ | |
2442 | rfapiItBiIndexDel(wcb->node, bi); | |
2443 | rfapiBgpInfoDetach(wcb->node, bi); /* with removed bi */ | |
2444 | ||
2445 | vnc_import_bgp_exterior_del_route_interior(bgp, wcb->import_table, | |
2446 | wcb->node, bi); | |
2447 | ||
2448 | ||
2449 | /* | |
2450 | * If VNC is configured to send response remove messages, AND | |
2451 | * if the removed route had a UN address, do response removal | |
2452 | * processing. | |
2453 | */ | |
2454 | if (!(bgp->rfapi_cfg->flags | |
2455 | & BGP_VNC_CONFIG_RESPONSE_REMOVAL_DISABLE)) { | |
2456 | ||
2457 | int has_valid_duplicate = 0; | |
2458 | struct bgp_info *bii; | |
2459 | ||
2460 | /* | |
2461 | * First check if there are any OTHER routes at this node | |
2462 | * that have the same nexthop and a valid UN address. If | |
2463 | * there are (e.g., from other peers), then the route isn't | |
2464 | * really gone, so skip sending a response removal message. | |
2465 | */ | |
2466 | for (bii = wcb->node->info; bii; bii = bii->next) { | |
2467 | if (rfapiVpnBiSamePtUn(bi, bii)) { | |
2468 | has_valid_duplicate = 1; | |
2469 | break; | |
2470 | } | |
2471 | } | |
2472 | ||
2473 | vnc_zlog_debug_verbose("%s: has_valid_duplicate=%d", __func__, | |
2474 | has_valid_duplicate); | |
2475 | ||
2476 | if (!has_valid_duplicate) { | |
2477 | rfapiRibPendingDeleteRoute(bgp, wcb->import_table, afi, | |
2478 | wcb->node); | |
2479 | } | |
2480 | } | |
2481 | ||
2482 | rfapiMonitorEncapDelete(bi); | |
2483 | ||
2484 | /* | |
2485 | * If there are no VPN monitors at this VPN Node A, | |
2486 | * we are done | |
2487 | */ | |
2488 | if (!RFAPI_MONITOR_VPN(wcb->node)) { | |
2489 | vnc_zlog_debug_verbose("%s: no VPN monitors at this node", | |
2490 | __func__); | |
2491 | goto done; | |
2492 | } | |
2493 | ||
2494 | /* | |
2495 | * rfapiMonitorMoveShorter only moves monitors if there are | |
2496 | * no remaining valid routes at the current node | |
2497 | */ | |
2498 | moved = rfapiMonitorMoveShorter(wcb->node, 1); | |
2499 | ||
2500 | if (moved) { | |
2501 | rfapiMonitorMovedUp(wcb->import_table, wcb->node, moved->node, | |
2502 | moved); | |
2503 | } | |
65efcfce LB |
2504 | |
2505 | done: | |
d62a17ae | 2506 | /* |
2507 | * Free VPN bi | |
2508 | */ | |
2509 | rfapiBgpInfoFree(bi); | |
2510 | wcb->info = NULL; | |
2511 | ||
2512 | /* | |
2513 | * If route count at this node has gone to 0, withdraw exported prefix | |
2514 | */ | |
2515 | if (!wcb->node->info) { | |
2516 | /* see if the struct rfapi_it_extra is empty and can be freed */ | |
2517 | rfapiMonitorExtraPrune(SAFI_MPLS_VPN, wcb->node); | |
2518 | vnc_direct_bgp_del_prefix(bgp, wcb->import_table, wcb->node); | |
2519 | vnc_zebra_del_prefix(bgp, wcb->import_table, wcb->node); | |
2520 | } else { | |
2521 | /* | |
2522 | * nexthop change event | |
2523 | * vnc_direct_bgp_add_prefix() will recompute the VN addr | |
2524 | * ecommunity | |
2525 | */ | |
2526 | vnc_direct_bgp_add_prefix(bgp, wcb->import_table, wcb->node); | |
2527 | } | |
2528 | ||
2529 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_MPLS_VPN, 1 + wcb->lockoffset); | |
2530 | route_unlock_node(wcb->node); /* decr ref count */ | |
2531 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
2532 | return 0; | |
65efcfce LB |
2533 | } |
2534 | ||
2535 | /* | |
2536 | * This works for multiprotocol extension, but not for plain ol' | |
2537 | * unicast IPv4 because that nexthop is stored in attr->nexthop | |
2538 | */ | |
d62a17ae | 2539 | void rfapiNexthop2Prefix(struct attr *attr, struct prefix *p) |
65efcfce | 2540 | { |
d62a17ae | 2541 | assert(p); |
2542 | assert(attr); | |
2543 | ||
2544 | memset(p, 0, sizeof(struct prefix)); | |
2545 | ||
2546 | switch (p->family = BGP_MP_NEXTHOP_FAMILY(attr->mp_nexthop_len)) { | |
2547 | case AF_INET: | |
2548 | p->u.prefix4 = attr->mp_nexthop_global_in; | |
2549 | p->prefixlen = 32; | |
2550 | break; | |
2551 | ||
2552 | case AF_INET6: | |
2553 | p->u.prefix6 = attr->mp_nexthop_global; | |
2554 | p->prefixlen = 128; | |
2555 | break; | |
2556 | ||
2557 | default: | |
2558 | vnc_zlog_debug_verbose("%s: Family is unknown = %d", __func__, | |
2559 | p->family); | |
2560 | } | |
65efcfce LB |
2561 | } |
2562 | ||
d62a17ae | 2563 | void rfapiUnicastNexthop2Prefix(afi_t afi, struct attr *attr, struct prefix *p) |
65efcfce | 2564 | { |
d62a17ae | 2565 | if (afi == AFI_IP) { |
2566 | p->family = AF_INET; | |
2567 | p->prefixlen = 32; | |
2568 | p->u.prefix4 = attr->nexthop; | |
2569 | } else { | |
2570 | rfapiNexthop2Prefix(attr, p); | |
2571 | } | |
65efcfce LB |
2572 | } |
2573 | ||
d62a17ae | 2574 | static int rfapiAttrNexthopAddrDifferent(struct prefix *p1, struct prefix *p2) |
65efcfce | 2575 | { |
d62a17ae | 2576 | if (!p1 || !p2) { |
2577 | vnc_zlog_debug_verbose("%s: p1 or p2 is NULL", __func__); | |
2578 | return 1; | |
2579 | } | |
2580 | ||
2581 | /* | |
2582 | * Are address families the same? | |
2583 | */ | |
2584 | if (p1->family != p2->family) { | |
2585 | return 1; | |
2586 | } | |
2587 | ||
2588 | switch (p1->family) { | |
2589 | case AF_INET: | |
2590 | if (IPV4_ADDR_SAME(&p1->u.prefix4, &p2->u.prefix4)) | |
2591 | return 0; | |
2592 | break; | |
2593 | ||
2594 | case AF_INET6: | |
2595 | if (IPV6_ADDR_SAME(&p1->u.prefix6, &p2->u.prefix6)) | |
2596 | return 0; | |
2597 | break; | |
2598 | ||
2599 | default: | |
2600 | assert(1); | |
2601 | } | |
2602 | ||
2603 | return 1; | |
65efcfce LB |
2604 | } |
2605 | ||
d62a17ae | 2606 | static void rfapiCopyUnEncap2VPN(struct bgp_info *encap_bi, |
2607 | struct bgp_info *vpn_bi) | |
65efcfce | 2608 | { |
d62a17ae | 2609 | if (!encap_bi->attr) { |
2610 | zlog_warn("%s: no encap bi attr/extra, can't copy UN address", | |
2611 | __func__); | |
2612 | return; | |
2613 | } | |
2614 | ||
2615 | if (!vpn_bi || !vpn_bi->extra) { | |
2616 | zlog_warn("%s: no vpn bi attr/extra, can't copy UN address", | |
2617 | __func__); | |
2618 | return; | |
2619 | } | |
2620 | ||
2621 | switch (BGP_MP_NEXTHOP_FAMILY(encap_bi->attr->mp_nexthop_len)) { | |
2622 | case AF_INET: | |
2623 | ||
2624 | /* | |
2625 | * instrumentation to debug segfault of 091127 | |
2626 | */ | |
2627 | vnc_zlog_debug_verbose("%s: vpn_bi=%p", __func__, vpn_bi); | |
2628 | if (vpn_bi) { | |
2629 | vnc_zlog_debug_verbose("%s: vpn_bi->extra=%p", __func__, | |
2630 | vpn_bi->extra); | |
2631 | } | |
2632 | ||
2633 | vpn_bi->extra->vnc.import.un_family = AF_INET; | |
2634 | vpn_bi->extra->vnc.import.un.addr4 = | |
2635 | encap_bi->attr->mp_nexthop_global_in; | |
2636 | break; | |
2637 | ||
2638 | case AF_INET6: | |
2639 | vpn_bi->extra->vnc.import.un_family = AF_INET6; | |
2640 | vpn_bi->extra->vnc.import.un.addr6 = | |
2641 | encap_bi->attr->mp_nexthop_global; | |
2642 | break; | |
2643 | ||
2644 | default: | |
2645 | zlog_warn("%s: invalid encap nexthop length: %d", __func__, | |
2646 | encap_bi->attr->mp_nexthop_len); | |
2647 | vpn_bi->extra->vnc.import.un_family = 0; | |
2648 | break; | |
2649 | } | |
65efcfce LB |
2650 | } |
2651 | ||
2652 | /* | |
2653 | * returns 0 on success, nonzero on error | |
2654 | */ | |
d62a17ae | 2655 | static int rfapiWithdrawEncapUpdateCachedUn( |
2656 | struct rfapi_import_table *import_table, struct bgp_info *encap_bi, | |
2657 | struct route_node *vpn_rn, struct bgp_info *vpn_bi) | |
65efcfce | 2658 | { |
d62a17ae | 2659 | if (!encap_bi) { |
2660 | ||
2661 | /* | |
2662 | * clear cached UN address | |
2663 | */ | |
2664 | if (!vpn_bi || !vpn_bi->extra) { | |
2665 | zlog_warn( | |
2666 | "%s: missing VPN bi/extra, can't clear UN addr", | |
2667 | __func__); | |
2668 | return 1; | |
2669 | } | |
2670 | vpn_bi->extra->vnc.import.un_family = 0; | |
2671 | memset(&vpn_bi->extra->vnc.import.un, 0, | |
2672 | sizeof(vpn_bi->extra->vnc.import.un)); | |
2673 | if (CHECK_FLAG(vpn_bi->flags, BGP_INFO_VALID)) { | |
2674 | if (rfapiGetVncTunnelUnAddr(vpn_bi->attr, NULL)) { | |
2675 | UNSET_FLAG(vpn_bi->flags, BGP_INFO_VALID); | |
2676 | if (VALID_INTERIOR_TYPE(vpn_bi->type)) | |
2677 | RFAPI_MONITOR_EXTERIOR(vpn_rn) | |
2678 | ->valid_interior_count--; | |
2679 | /* signal interior route withdrawal to | |
2680 | * import-exterior */ | |
2681 | vnc_import_bgp_exterior_del_route_interior( | |
2682 | bgp_get_default(), import_table, vpn_rn, | |
2683 | vpn_bi); | |
2684 | } | |
2685 | } | |
2686 | ||
2687 | } else { | |
2688 | if (!vpn_bi) { | |
2689 | zlog_warn("%s: missing VPN bi, can't clear UN addr", | |
2690 | __func__); | |
2691 | return 1; | |
2692 | } | |
2693 | rfapiCopyUnEncap2VPN(encap_bi, vpn_bi); | |
2694 | if (!CHECK_FLAG(vpn_bi->flags, BGP_INFO_VALID)) { | |
2695 | SET_FLAG(vpn_bi->flags, BGP_INFO_VALID); | |
2696 | if (VALID_INTERIOR_TYPE(vpn_bi->type)) | |
2697 | RFAPI_MONITOR_EXTERIOR(vpn_rn) | |
2698 | ->valid_interior_count++; | |
2699 | /* signal interior route withdrawal to import-exterior | |
2700 | */ | |
2701 | vnc_import_bgp_exterior_add_route_interior( | |
2702 | bgp_get_default(), import_table, vpn_rn, | |
2703 | vpn_bi); | |
2704 | } | |
2705 | } | |
2706 | return 0; | |
65efcfce LB |
2707 | } |
2708 | ||
d62a17ae | 2709 | static int rfapiWithdrawTimerEncap(struct thread *t) |
65efcfce | 2710 | { |
d62a17ae | 2711 | struct rfapi_withdraw *wcb = t->arg; |
2712 | struct bgp_info *bi = wcb->info; | |
2713 | int was_first_route = 0; | |
2714 | struct rfapi_monitor_encap *em; | |
2715 | struct skiplist *vpn_node_sl = skiplist_new(0, NULL, NULL); | |
2716 | ||
2717 | assert(wcb->node); | |
2718 | assert(bi); | |
2719 | assert(wcb->import_table); | |
2720 | ||
2721 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_ENCAP, 0); | |
2722 | ||
2723 | if (wcb->node->info == bi) | |
2724 | was_first_route = 1; | |
2725 | ||
2726 | /* | |
2727 | * Remove the route/bi and free it | |
2728 | */ | |
2729 | rfapiBgpInfoDetach(wcb->node, bi); | |
2730 | rfapiBgpInfoFree(bi); | |
2731 | ||
2732 | if (!was_first_route) | |
2733 | goto done; | |
2734 | ||
2735 | for (em = RFAPI_MONITOR_ENCAP(wcb->node); em; em = em->next) { | |
2736 | ||
2737 | /* | |
2738 | * Update monitoring VPN BIs with new encap info at the | |
2739 | * head of the encap bi chain (which could be NULL after | |
2740 | * removing the expiring bi above) | |
2741 | */ | |
2742 | if (rfapiWithdrawEncapUpdateCachedUn(wcb->import_table, | |
2743 | wcb->node->info, em->node, | |
2744 | em->bi)) | |
2745 | continue; | |
2746 | ||
2747 | /* | |
2748 | * Build a list of unique VPN nodes referenced by these | |
2749 | * monitors. | |
2750 | * Use a skiplist for speed. | |
2751 | */ | |
2752 | skiplist_insert(vpn_node_sl, em->node, em->node); | |
2753 | } | |
2754 | ||
2755 | ||
2756 | /* | |
2757 | * for each VPN node referenced in the ENCAP monitors: | |
2758 | */ | |
2759 | struct route_node *rn; | |
2760 | while (!skiplist_first(vpn_node_sl, (void **)&rn, NULL)) { | |
2761 | if (!wcb->node->info) { | |
2762 | struct rfapi_monitor_vpn *moved; | |
2763 | ||
2764 | moved = rfapiMonitorMoveShorter(rn, 0); | |
2765 | if (moved) { | |
2766 | // rfapiDoRouteCallback(wcb->import_table, | |
2767 | // moved->node, moved); | |
2768 | rfapiMonitorMovedUp(wcb->import_table, rn, | |
2769 | moved->node, moved); | |
2770 | } | |
2771 | } else { | |
2772 | // rfapiDoRouteCallback(wcb->import_table, rn, NULL); | |
2773 | rfapiMonitorItNodeChanged(wcb->import_table, rn, NULL); | |
2774 | } | |
2775 | skiplist_delete_first(vpn_node_sl); | |
2776 | } | |
65efcfce LB |
2777 | |
2778 | done: | |
d62a17ae | 2779 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_ENCAP, 1); |
2780 | route_unlock_node(wcb->node); /* decr ref count */ | |
2781 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
2782 | skiplist_free(vpn_node_sl); | |
2783 | return 0; | |
65efcfce LB |
2784 | } |
2785 | ||
2786 | ||
2787 | /* | |
2788 | * Works for both VPN and ENCAP routes; timer_service_func is different | |
2789 | * in each case | |
2790 | */ | |
2791 | static void | |
d62a17ae | 2792 | rfapiBiStartWithdrawTimer(struct rfapi_import_table *import_table, |
2793 | struct route_node *rn, struct bgp_info *bi, afi_t afi, | |
2794 | safi_t safi, | |
2795 | int (*timer_service_func)(struct thread *)) | |
65efcfce | 2796 | { |
d62a17ae | 2797 | uint32_t lifetime; |
2798 | struct rfapi_withdraw *wcb; | |
2799 | ||
2800 | if | |
2801 | CHECK_FLAG(bi->flags, BGP_INFO_REMOVED) | |
2802 | { | |
2803 | /* | |
2804 | * Already on the path to being withdrawn, | |
2805 | * should already have a timer set up to | |
2806 | * delete it. | |
2807 | */ | |
2808 | vnc_zlog_debug_verbose( | |
2809 | "%s: already being withdrawn, do nothing", | |
2810 | __func__); | |
2811 | return; | |
2812 | } | |
2813 | ||
2814 | rfapiGetVncLifetime(bi->attr, &lifetime); | |
2815 | vnc_zlog_debug_verbose("%s: VNC lifetime is %u", __func__, lifetime); | |
2816 | ||
2817 | /* | |
2818 | * withdrawn routes get to hang around for a while | |
2819 | */ | |
2820 | SET_FLAG(bi->flags, BGP_INFO_REMOVED); | |
2821 | ||
2822 | /* set timer to remove the route later */ | |
2823 | lifetime = rfapiGetHolddownFromLifetime(lifetime); | |
2824 | vnc_zlog_debug_verbose("%s: using timeout %u", __func__, lifetime); | |
2825 | ||
2826 | /* | |
2827 | * Stash import_table, node, and info for use by timer | |
2828 | * service routine, which is supposed to free the wcb. | |
2829 | */ | |
2830 | wcb = XCALLOC(MTYPE_RFAPI_WITHDRAW, sizeof(struct rfapi_withdraw)); | |
2831 | assert(wcb); | |
2832 | wcb->node = rn; | |
2833 | wcb->info = bi; | |
2834 | wcb->import_table = import_table; | |
2835 | bgp_attr_intern(bi->attr); | |
2836 | ||
2837 | if (VNC_DEBUG(VERBOSE)) { | |
2838 | vnc_zlog_debug_verbose( | |
2839 | "%s: wcb values: node=%p, info=%p, import_table=%p (bi follows)", | |
2840 | __func__, wcb->node, wcb->info, wcb->import_table); | |
2841 | rfapiPrintBi(NULL, bi); | |
2842 | } | |
2843 | ||
2844 | ||
2845 | assert(bi->extra); | |
2846 | if (lifetime > UINT32_MAX / 1001) { | |
2847 | /* sub-optimal case, but will probably never happen */ | |
2848 | bi->extra->vnc.import.timer = NULL; | |
2849 | thread_add_timer(bm->master, timer_service_func, wcb, lifetime, | |
2850 | &bi->extra->vnc.import.timer); | |
2851 | } else { | |
2852 | static uint32_t jitter; | |
2853 | uint32_t lifetime_msec; | |
2854 | ||
2855 | /* | |
2856 | * the goal here is to spread out the timers so they are | |
2857 | * sortable in the skip list | |
2858 | */ | |
2859 | if (++jitter >= 1000) | |
2860 | jitter = 0; | |
2861 | ||
2862 | lifetime_msec = (lifetime * 1000) + jitter; | |
2863 | ||
2864 | bi->extra->vnc.import.timer = NULL; | |
2865 | thread_add_timer_msec(bm->master, timer_service_func, wcb, | |
2866 | lifetime_msec, | |
2867 | &bi->extra->vnc.import.timer); | |
2868 | } | |
2869 | ||
2870 | /* re-sort route list (BGP_INFO_REMOVED routes are last) */ | |
2871 | if (((struct bgp_info *)rn->info)->next) { | |
2872 | rfapiBgpInfoDetach(rn, bi); | |
2873 | rfapiBgpInfoAttachSorted(rn, bi, afi, safi); | |
2874 | } | |
65efcfce LB |
2875 | } |
2876 | ||
2877 | ||
d62a17ae | 2878 | typedef void(rfapi_bi_filtered_import_f)(struct rfapi_import_table *, int, |
2879 | struct peer *, void *, struct prefix *, | |
2880 | struct prefix *, afi_t, | |
2881 | struct prefix_rd *, struct attr *, | |
d7c0a89a | 2882 | uint8_t, uint8_t, uint32_t *); |
65efcfce LB |
2883 | |
2884 | ||
d62a17ae | 2885 | static void rfapiExpireEncapNow(struct rfapi_import_table *it, |
2886 | struct route_node *rn, struct bgp_info *bi) | |
65efcfce | 2887 | { |
d62a17ae | 2888 | struct rfapi_withdraw *wcb; |
2889 | struct thread t; | |
2890 | ||
2891 | /* | |
2892 | * pretend we're an expiring timer | |
2893 | */ | |
2894 | wcb = XCALLOC(MTYPE_RFAPI_WITHDRAW, sizeof(struct rfapi_withdraw)); | |
2895 | wcb->info = bi; | |
2896 | wcb->node = rn; | |
2897 | wcb->import_table = it; | |
2898 | memset(&t, 0, sizeof(t)); | |
2899 | t.arg = wcb; | |
2900 | rfapiWithdrawTimerEncap(&t); /* frees wcb */ | |
65efcfce LB |
2901 | } |
2902 | ||
d62a17ae | 2903 | static int rfapiGetNexthop(struct attr *attr, struct prefix *prefix) |
65efcfce | 2904 | { |
d62a17ae | 2905 | switch (BGP_MP_NEXTHOP_FAMILY(attr->mp_nexthop_len)) { |
2906 | case AF_INET: | |
2907 | prefix->family = AF_INET; | |
2908 | prefix->prefixlen = 32; | |
2909 | prefix->u.prefix4 = attr->mp_nexthop_global_in; | |
2910 | break; | |
2911 | case AF_INET6: | |
2912 | prefix->family = AF_INET6; | |
2913 | prefix->prefixlen = 128; | |
2914 | prefix->u.prefix6 = attr->mp_nexthop_global; | |
2915 | break; | |
2916 | default: | |
2917 | vnc_zlog_debug_verbose("%s: unknown attr->mp_nexthop_len %d", | |
2918 | __func__, attr->mp_nexthop_len); | |
2919 | return EINVAL; | |
2920 | } | |
2921 | return 0; | |
65efcfce LB |
2922 | } |
2923 | ||
d62a17ae | 2924 | /* |
65efcfce LB |
2925 | * import a bgp_info if its route target list intersects with the |
2926 | * import table's route target list | |
2927 | */ | |
d62a17ae | 2928 | static void rfapiBgpInfoFilteredImportEncap( |
2929 | struct rfapi_import_table *import_table, int action, struct peer *peer, | |
2930 | void *rfd, /* set for looped back routes */ | |
2931 | struct prefix *p, | |
2932 | struct prefix *aux_prefix, /* Unused for encap routes */ | |
2933 | afi_t afi, struct prefix_rd *prd, | |
2934 | struct attr *attr, /* part of bgp_info */ | |
d7c0a89a QY |
2935 | uint8_t type, /* part of bgp_info */ |
2936 | uint8_t sub_type, /* part of bgp_info */ | |
d62a17ae | 2937 | uint32_t *label) /* part of bgp_info */ |
65efcfce | 2938 | { |
d62a17ae | 2939 | struct route_table *rt = NULL; |
2940 | struct route_node *rn; | |
2941 | struct bgp_info *info_new; | |
2942 | struct bgp_info *bi; | |
2943 | struct bgp_info *next; | |
2944 | char buf[BUFSIZ]; | |
2945 | ||
2946 | struct prefix p_firstbi_old; | |
2947 | struct prefix p_firstbi_new; | |
2948 | int replacing = 0; | |
2949 | const char *action_str = NULL; | |
2950 | struct prefix un_prefix; | |
2951 | ||
2952 | struct bgp *bgp; | |
2953 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
2954 | ||
2955 | switch (action) { | |
2956 | case FIF_ACTION_UPDATE: | |
2957 | action_str = "update"; | |
2958 | break; | |
2959 | case FIF_ACTION_WITHDRAW: | |
2960 | action_str = "withdraw"; | |
2961 | break; | |
2962 | case FIF_ACTION_KILL: | |
2963 | action_str = "kill"; | |
2964 | break; | |
2965 | default: | |
2966 | assert(0); | |
2967 | break; | |
2968 | } | |
2969 | ||
2970 | vnc_zlog_debug_verbose( | |
2971 | "%s: entry: %s: prefix %s/%d", __func__, action_str, | |
2972 | inet_ntop(p->family, &p->u.prefix, buf, BUFSIZ), p->prefixlen); | |
2973 | ||
2974 | memset(&p_firstbi_old, 0, sizeof(p_firstbi_old)); | |
2975 | memset(&p_firstbi_new, 0, sizeof(p_firstbi_new)); | |
2976 | ||
2977 | if (action == FIF_ACTION_UPDATE) { | |
2978 | /* | |
2979 | * Compare rt lists. If no intersection, don't import this route | |
2980 | * On a withdraw, peer and RD are sufficient to determine if | |
2981 | * we should act. | |
2982 | */ | |
2983 | if (!attr || !attr->ecommunity) { | |
2984 | ||
2985 | vnc_zlog_debug_verbose( | |
2986 | "%s: attr, extra, or ecommunity missing, not importing", | |
2987 | __func__); | |
2988 | return; | |
2989 | } | |
65efcfce | 2990 | #if RFAPI_REQUIRE_ENCAP_BEEC |
d62a17ae | 2991 | if (!rfapiEcommunitiesMatchBeec(attr->ecommunity)) { |
2992 | vnc_zlog_debug_verbose( | |
2993 | "%s: it=%p: no match for BGP Encapsulation ecommunity", | |
2994 | __func__, import_table); | |
2995 | return; | |
2996 | } | |
65efcfce | 2997 | #endif |
d62a17ae | 2998 | if (!rfapiEcommunitiesIntersect(import_table->rt_import_list, |
2999 | attr->ecommunity)) { | |
3000 | ||
3001 | vnc_zlog_debug_verbose( | |
3002 | "%s: it=%p: no ecommunity intersection", | |
3003 | __func__, import_table); | |
3004 | return; | |
3005 | } | |
3006 | ||
3007 | /* | |
3008 | * Updates must also have a nexthop address | |
3009 | */ | |
3010 | memset(&un_prefix, 0, | |
3011 | sizeof(un_prefix)); /* keep valgrind happy */ | |
3012 | if (rfapiGetNexthop(attr, &un_prefix)) { | |
3013 | vnc_zlog_debug_verbose("%s: missing nexthop address", | |
3014 | __func__); | |
3015 | return; | |
3016 | } | |
3017 | } | |
3018 | ||
3019 | /* | |
3020 | * Figure out which radix tree the route would go into | |
3021 | */ | |
3022 | switch (afi) { | |
3023 | case AFI_IP: | |
3024 | case AFI_IP6: | |
3025 | rt = import_table->imported_encap[afi]; | |
3026 | break; | |
3027 | ||
3028 | default: | |
3029 | zlog_err("%s: bad afi %d", __func__, afi); | |
3030 | return; | |
3031 | } | |
3032 | ||
3033 | /* | |
3034 | * route_node_lookup returns a node only if there is at least | |
3035 | * one route attached. | |
3036 | */ | |
3037 | rn = route_node_lookup(rt, p); | |
65efcfce LB |
3038 | |
3039 | #if DEBUG_ENCAP_MONITOR | |
d62a17ae | 3040 | vnc_zlog_debug_verbose("%s: initial encap lookup(it=%p) rn=%p", |
3041 | __func__, import_table, rn); | |
65efcfce LB |
3042 | #endif |
3043 | ||
d62a17ae | 3044 | if (rn) { |
3045 | ||
3046 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, 1); | |
3047 | route_unlock_node(rn); /* undo lock in route_node_lookup */ | |
3048 | ||
3049 | ||
3050 | /* | |
3051 | * capture nexthop of first bi | |
3052 | */ | |
3053 | if (rn->info) { | |
3054 | rfapiNexthop2Prefix( | |
3055 | ((struct bgp_info *)(rn->info))->attr, | |
3056 | &p_firstbi_old); | |
3057 | } | |
3058 | ||
3059 | for (bi = rn->info; bi; bi = bi->next) { | |
3060 | ||
3061 | /* | |
3062 | * Does this bgp_info refer to the same route | |
3063 | * as we are trying to add? | |
3064 | */ | |
3065 | vnc_zlog_debug_verbose("%s: comparing BI %p", __func__, | |
3066 | bi); | |
3067 | ||
3068 | ||
3069 | /* | |
3070 | * Compare RDs | |
3071 | * | |
3072 | * RD of import table bi is in bi->extra->vnc.import.rd | |
3073 | * RD of info_orig is in prd | |
3074 | */ | |
3075 | if (!bi->extra) { | |
3076 | vnc_zlog_debug_verbose("%s: no bi->extra", | |
3077 | __func__); | |
3078 | continue; | |
3079 | } | |
3080 | if (prefix_cmp( | |
3081 | (struct prefix *)&bi->extra->vnc.import.rd, | |
3082 | (struct prefix *)prd)) { | |
3083 | ||
3084 | vnc_zlog_debug_verbose("%s: prd does not match", | |
3085 | __func__); | |
3086 | continue; | |
3087 | } | |
3088 | ||
3089 | /* | |
3090 | * Compare peers | |
3091 | */ | |
3092 | if (bi->peer != peer) { | |
3093 | vnc_zlog_debug_verbose( | |
3094 | "%s: peer does not match", __func__); | |
3095 | continue; | |
3096 | } | |
3097 | ||
3098 | vnc_zlog_debug_verbose("%s: found matching bi", | |
3099 | __func__); | |
3100 | ||
3101 | /* Same route. Delete this bi, replace with new one */ | |
3102 | ||
3103 | if (action == FIF_ACTION_WITHDRAW) { | |
3104 | ||
3105 | vnc_zlog_debug_verbose( | |
3106 | "%s: withdrawing at prefix %s/%d", | |
3107 | __func__, | |
3108 | inet_ntop(rn->p.family, &rn->p.u.prefix, | |
3109 | buf, BUFSIZ), | |
3110 | rn->p.prefixlen); | |
3111 | ||
3112 | rfapiBiStartWithdrawTimer( | |
3113 | import_table, rn, bi, afi, SAFI_ENCAP, | |
3114 | rfapiWithdrawTimerEncap); | |
3115 | ||
3116 | } else { | |
3117 | vnc_zlog_debug_verbose( | |
3118 | "%s: %s at prefix %s/%d", __func__, | |
3119 | ((action == FIF_ACTION_KILL) | |
3120 | ? "killing" | |
3121 | : "replacing"), | |
3122 | inet_ntop(rn->p.family, &rn->p.u.prefix, | |
3123 | buf, BUFSIZ), | |
3124 | rn->p.prefixlen); | |
3125 | ||
3126 | /* | |
3127 | * If this route is waiting to be deleted | |
3128 | * because of | |
3129 | * a previous withdraw, we must cancel its | |
3130 | * timer. | |
3131 | */ | |
3132 | if (CHECK_FLAG(bi->flags, BGP_INFO_REMOVED) | |
3133 | && bi->extra->vnc.import.timer) { | |
3134 | ||
3135 | struct thread *t = | |
3136 | (struct thread *)bi->extra->vnc | |
3137 | .import.timer; | |
3138 | struct rfapi_withdraw *wcb = t->arg; | |
3139 | ||
3140 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
3141 | thread_cancel(t); | |
3142 | } | |
3143 | ||
3144 | if (action == FIF_ACTION_UPDATE) { | |
3145 | rfapiBgpInfoDetach(rn, bi); | |
3146 | rfapiBgpInfoFree(bi); | |
3147 | replacing = 1; | |
3148 | } else { | |
3149 | /* | |
3150 | * Kill: do export stuff when removing | |
3151 | * bi | |
3152 | */ | |
3153 | struct rfapi_withdraw *wcb; | |
3154 | struct thread t; | |
3155 | ||
3156 | /* | |
3157 | * pretend we're an expiring timer | |
3158 | */ | |
3159 | wcb = XCALLOC( | |
3160 | MTYPE_RFAPI_WITHDRAW, | |
3161 | sizeof(struct rfapi_withdraw)); | |
3162 | wcb->info = bi; | |
3163 | wcb->node = rn; | |
3164 | wcb->import_table = import_table; | |
3165 | memset(&t, 0, sizeof(t)); | |
3166 | t.arg = wcb; | |
3167 | rfapiWithdrawTimerEncap( | |
3168 | &t); /* frees wcb */ | |
3169 | } | |
3170 | } | |
3171 | ||
3172 | break; | |
3173 | } | |
3174 | } | |
3175 | ||
3176 | if (rn) | |
3177 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, replacing ? 1 : 0); | |
3178 | ||
3179 | if (action == FIF_ACTION_WITHDRAW || action == FIF_ACTION_KILL) | |
3180 | return; | |
3181 | ||
3182 | info_new = | |
3183 | rfapiBgpInfoCreate(attr, peer, rfd, prd, type, sub_type, NULL); | |
3184 | ||
3185 | if (rn) { | |
3186 | if (!replacing) | |
3187 | route_lock_node(rn); /* incr ref count for new BI */ | |
3188 | } else { | |
3189 | rn = route_node_get(rt, p); | |
3190 | } | |
3191 | ||
3192 | vnc_zlog_debug_verbose( | |
3193 | "%s: (afi=%d, rn=%p) inserting at prefix %s/%d", __func__, afi, | |
3194 | rn, inet_ntop(rn->p.family, &rn->p.u.prefix, buf, BUFSIZ), | |
3195 | rn->p.prefixlen); | |
3196 | ||
3197 | rfapiBgpInfoAttachSorted(rn, info_new, afi, SAFI_ENCAP); | |
3198 | ||
3199 | /* | |
3200 | * Delete holddown routes from same NVE. See details in | |
3201 | * rfapiBgpInfoFilteredImportVPN() | |
3202 | */ | |
3203 | for (bi = info_new->next; bi; bi = next) { | |
3204 | ||
3205 | struct prefix pfx_un; | |
3206 | int un_match = 0; | |
3207 | ||
3208 | next = bi->next; | |
3209 | if (!CHECK_FLAG(bi->flags, BGP_INFO_REMOVED)) | |
3210 | continue; | |
3211 | ||
3212 | /* | |
3213 | * We already match the VN address (it is the prefix | |
3214 | * of the route node) | |
3215 | */ | |
3216 | ||
3217 | if (!rfapiGetNexthop(bi->attr, &pfx_un) | |
3218 | && prefix_same(&pfx_un, &un_prefix)) { | |
3219 | ||
3220 | un_match = 1; | |
3221 | } | |
3222 | ||
3223 | if (!un_match) | |
3224 | continue; | |
3225 | ||
3226 | vnc_zlog_debug_verbose( | |
3227 | "%s: removing holddown bi matching NVE of new route", | |
3228 | __func__); | |
3229 | if (bi->extra->vnc.import.timer) { | |
3230 | struct thread *t = | |
3231 | (struct thread *)bi->extra->vnc.import.timer; | |
3232 | struct rfapi_withdraw *wcb = t->arg; | |
3233 | ||
3234 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
3235 | thread_cancel(t); | |
3236 | } | |
3237 | rfapiExpireEncapNow(import_table, rn, bi); | |
3238 | } | |
3239 | ||
3240 | rfapiNexthop2Prefix(((struct bgp_info *)(rn->info))->attr, | |
3241 | &p_firstbi_new); | |
3242 | ||
3243 | /* | |
3244 | * If the nexthop address of the selected Encap route (i.e., | |
3245 | * the UN address) has changed, then we must update the VPN | |
3246 | * routes that refer to this Encap route and possibly force | |
3247 | * rfapi callbacks. | |
3248 | */ | |
3249 | if (rfapiAttrNexthopAddrDifferent(&p_firstbi_old, &p_firstbi_new)) { | |
3250 | ||
3251 | struct rfapi_monitor_encap *m; | |
3252 | struct rfapi_monitor_encap *mnext; | |
3253 | ||
3254 | struct route_node *referenced_vpn_prefix; | |
3255 | ||
3256 | /* | |
3257 | * Optimized approach: build radix tree on the fly to | |
3258 | * hold list of VPN nodes referenced by the ENCAP monitors | |
3259 | * | |
3260 | * The nodes in this table correspond to prefixes of VPN routes. | |
3261 | * The "info" pointer of the node points to a chain of | |
3262 | * struct rfapi_monitor_encap, each of which refers to a | |
3263 | * specific VPN node. | |
3264 | */ | |
3265 | struct route_table *referenced_vpn_table; | |
3266 | ||
3267 | referenced_vpn_table = route_table_init(); | |
3268 | assert(referenced_vpn_table); | |
3269 | ||
3270 | /* | |
3271 | * iterate over the set of monitors at this ENCAP node. | |
3272 | */ | |
65efcfce | 3273 | #if DEBUG_ENCAP_MONITOR |
d62a17ae | 3274 | vnc_zlog_debug_verbose("%s: examining monitors at rn=%p", |
3275 | __func__, rn); | |
65efcfce | 3276 | #endif |
d62a17ae | 3277 | for (m = RFAPI_MONITOR_ENCAP(rn); m; m = m->next) { |
3278 | ||
3279 | /* | |
3280 | * For each referenced bi/route, copy the ENCAP route's | |
3281 | * nexthop to the VPN route's cached UN address field | |
3282 | * and set | |
3283 | * the address family of the cached UN address field. | |
3284 | */ | |
3285 | rfapiCopyUnEncap2VPN(info_new, m->bi); | |
3286 | if (!CHECK_FLAG(m->bi->flags, BGP_INFO_VALID)) { | |
3287 | SET_FLAG(m->bi->flags, BGP_INFO_VALID); | |
3288 | if (VALID_INTERIOR_TYPE(m->bi->type)) | |
3289 | RFAPI_MONITOR_EXTERIOR(m->node) | |
3290 | ->valid_interior_count++; | |
3291 | vnc_import_bgp_exterior_add_route_interior( | |
3292 | bgp, import_table, m->node, m->bi); | |
3293 | } | |
3294 | ||
3295 | /* | |
3296 | * Build a list of unique VPN nodes referenced by these | |
3297 | * monitors | |
3298 | * | |
3299 | * There could be more than one VPN node here with a | |
3300 | * given | |
3301 | * prefix. Those are currently in an unsorted linear | |
3302 | * list | |
3303 | * per prefix. | |
3304 | */ | |
3305 | ||
3306 | referenced_vpn_prefix = route_node_get( | |
3307 | referenced_vpn_table, &m->node->p); | |
3308 | assert(referenced_vpn_prefix); | |
3309 | for (mnext = referenced_vpn_prefix->info; mnext; | |
3310 | mnext = mnext->next) { | |
3311 | ||
3312 | if (mnext->node == m->node) | |
3313 | break; | |
3314 | } | |
3315 | ||
3316 | if (mnext) { | |
3317 | /* | |
3318 | * already have an entry for this VPN node | |
3319 | */ | |
3320 | route_unlock_node(referenced_vpn_prefix); | |
3321 | } else { | |
3322 | mnext = XCALLOC( | |
3323 | MTYPE_RFAPI_MONITOR_ENCAP, | |
3324 | sizeof(struct rfapi_monitor_encap)); | |
3325 | assert(mnext); | |
3326 | mnext->node = m->node; | |
3327 | mnext->next = referenced_vpn_prefix->info; | |
3328 | referenced_vpn_prefix->info = mnext; | |
3329 | } | |
3330 | } | |
3331 | ||
3332 | /* | |
3333 | * for each VPN node referenced in the ENCAP monitors: | |
3334 | */ | |
3335 | for (referenced_vpn_prefix = route_top(referenced_vpn_table); | |
3336 | referenced_vpn_prefix; referenced_vpn_prefix = route_next( | |
3337 | referenced_vpn_prefix)) { | |
3338 | ||
3339 | while ((m = referenced_vpn_prefix->info)) { | |
3340 | ||
3341 | struct route_node *n; | |
3342 | ||
3343 | rfapiMonitorMoveLonger(m->node); | |
3344 | for (n = m->node; n; n = n->parent) { | |
3345 | // rfapiDoRouteCallback(import_table, n, | |
3346 | // NULL); | |
3347 | } | |
3348 | rfapiMonitorItNodeChanged(import_table, m->node, | |
3349 | NULL); | |
3350 | ||
3351 | referenced_vpn_prefix->info = m->next; | |
3352 | route_unlock_node(referenced_vpn_prefix); | |
3353 | XFREE(MTYPE_RFAPI_MONITOR_ENCAP, m); | |
3354 | } | |
3355 | } | |
3356 | route_table_finish(referenced_vpn_table); | |
3357 | } | |
3358 | ||
3359 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, 0); | |
65efcfce LB |
3360 | } |
3361 | ||
d62a17ae | 3362 | static void rfapiExpireVpnNow(struct rfapi_import_table *it, |
3363 | struct route_node *rn, struct bgp_info *bi, | |
3364 | int lockoffset) | |
65efcfce | 3365 | { |
d62a17ae | 3366 | struct rfapi_withdraw *wcb; |
3367 | struct thread t; | |
3368 | ||
3369 | /* | |
3370 | * pretend we're an expiring timer | |
3371 | */ | |
3372 | wcb = XCALLOC(MTYPE_RFAPI_WITHDRAW, sizeof(struct rfapi_withdraw)); | |
3373 | wcb->info = bi; | |
3374 | wcb->node = rn; | |
3375 | wcb->import_table = it; | |
3376 | wcb->lockoffset = lockoffset; | |
3377 | memset(&t, 0, sizeof(t)); | |
3378 | t.arg = wcb; | |
3379 | rfapiWithdrawTimerVPN(&t); /* frees wcb */ | |
65efcfce LB |
3380 | } |
3381 | ||
3382 | ||
d62a17ae | 3383 | /* |
65efcfce LB |
3384 | * import a bgp_info if its route target list intersects with the |
3385 | * import table's route target list | |
3386 | */ | |
d62a17ae | 3387 | void rfapiBgpInfoFilteredImportVPN( |
3388 | struct rfapi_import_table *import_table, int action, struct peer *peer, | |
3389 | void *rfd, /* set for looped back routes */ | |
3390 | struct prefix *p, | |
3391 | struct prefix *aux_prefix, /* AFI_L2VPN: optional IP */ | |
3392 | afi_t afi, struct prefix_rd *prd, | |
3393 | struct attr *attr, /* part of bgp_info */ | |
d7c0a89a QY |
3394 | uint8_t type, /* part of bgp_info */ |
3395 | uint8_t sub_type, /* part of bgp_info */ | |
d62a17ae | 3396 | uint32_t *label) /* part of bgp_info */ |
65efcfce | 3397 | { |
d62a17ae | 3398 | struct route_table *rt = NULL; |
3399 | struct route_node *rn; | |
3400 | struct route_node *n; | |
3401 | struct bgp_info *info_new; | |
3402 | struct bgp_info *bi; | |
3403 | struct bgp_info *next; | |
3404 | char buf[BUFSIZ]; | |
3405 | struct prefix vn_prefix; | |
3406 | struct prefix un_prefix; | |
3407 | int un_prefix_valid = 0; | |
3408 | struct route_node *ern; | |
3409 | int replacing = 0; | |
3410 | int original_had_routes = 0; | |
3411 | struct prefix original_nexthop; | |
3412 | const char *action_str = NULL; | |
3413 | int is_it_ce = 0; | |
3414 | ||
3415 | struct bgp *bgp; | |
3416 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
3417 | ||
3418 | switch (action) { | |
3419 | case FIF_ACTION_UPDATE: | |
3420 | action_str = "update"; | |
3421 | break; | |
3422 | case FIF_ACTION_WITHDRAW: | |
3423 | action_str = "withdraw"; | |
3424 | break; | |
3425 | case FIF_ACTION_KILL: | |
3426 | action_str = "kill"; | |
3427 | break; | |
3428 | default: | |
3429 | assert(0); | |
3430 | break; | |
3431 | } | |
3432 | ||
3433 | if (import_table == bgp->rfapi->it_ce) | |
3434 | is_it_ce = 1; | |
3435 | ||
3436 | vnc_zlog_debug_verbose("%s: entry: %s%s: prefix %s/%d: it %p, afi %s", | |
3437 | __func__, (is_it_ce ? "CE-IT " : ""), action_str, | |
3438 | rfapi_ntop(p->family, &p->u.prefix, buf, BUFSIZ), | |
3439 | p->prefixlen, import_table, afi2str(afi)); | |
3440 | ||
3441 | VNC_ITRCCK; | |
3442 | ||
3443 | /* | |
3444 | * Compare rt lists. If no intersection, don't import this route | |
3445 | * On a withdraw, peer and RD are sufficient to determine if | |
3446 | * we should act. | |
3447 | */ | |
3448 | if (action == FIF_ACTION_UPDATE) { | |
3449 | if (!attr || !attr->ecommunity) { | |
3450 | ||
3451 | vnc_zlog_debug_verbose( | |
3452 | "%s: attr, extra, or ecommunity missing, not importing", | |
3453 | __func__); | |
3454 | return; | |
3455 | } | |
3456 | if ((import_table != bgp->rfapi->it_ce) | |
3457 | && !rfapiEcommunitiesIntersect(import_table->rt_import_list, | |
3458 | attr->ecommunity)) { | |
3459 | ||
3460 | vnc_zlog_debug_verbose( | |
3461 | "%s: it=%p: no ecommunity intersection", | |
3462 | __func__, import_table); | |
3463 | return; | |
3464 | } | |
3465 | ||
3466 | memset(&vn_prefix, 0, | |
3467 | sizeof(vn_prefix)); /* keep valgrind happy */ | |
3468 | if (rfapiGetNexthop(attr, &vn_prefix)) { | |
3469 | /* missing nexthop address would be a bad, bad thing */ | |
3470 | vnc_zlog_debug_verbose("%s: missing nexthop", __func__); | |
3471 | return; | |
3472 | } | |
3473 | } | |
3474 | ||
3475 | /* | |
3476 | * Figure out which radix tree the route would go into | |
3477 | */ | |
3478 | switch (afi) { | |
3479 | case AFI_IP: | |
3480 | case AFI_IP6: | |
3481 | case AFI_L2VPN: | |
3482 | rt = import_table->imported_vpn[afi]; | |
3483 | break; | |
3484 | ||
3485 | default: | |
3486 | zlog_err("%s: bad afi %d", __func__, afi); | |
3487 | return; | |
3488 | } | |
3489 | ||
3490 | /* clear it */ | |
3491 | memset(&original_nexthop, 0, sizeof(original_nexthop)); | |
3492 | ||
3493 | /* | |
3494 | * route_node_lookup returns a node only if there is at least | |
3495 | * one route attached. | |
3496 | */ | |
3497 | rn = route_node_lookup(rt, p); | |
3498 | ||
3499 | vnc_zlog_debug_verbose("%s: rn=%p", __func__, rn); | |
3500 | ||
3501 | if (rn) { | |
3502 | ||
3503 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, 1); | |
3504 | route_unlock_node(rn); /* undo lock in route_node_lookup */ | |
3505 | ||
3506 | if (rn->info) | |
3507 | original_had_routes = 1; | |
3508 | ||
3509 | if (VNC_DEBUG(VERBOSE)) { | |
3510 | vnc_zlog_debug_verbose("%s: showing IT node on entry", | |
3511 | __func__); | |
3512 | rfapiShowItNode(NULL, rn); /* debug */ | |
3513 | } | |
3514 | ||
3515 | /* | |
3516 | * Look for same route (will have same RD and peer) | |
3517 | */ | |
3518 | bi = rfapiItBiIndexSearch(rn, prd, peer, aux_prefix); | |
3519 | ||
3520 | if (bi) { | |
3521 | ||
3522 | /* | |
3523 | * This was an old test when we iterated over the | |
3524 | * BIs linearly. Since we're now looking up with | |
3525 | * RD and peer, comparing types should not be | |
3526 | * needed. Changed to assertion. | |
3527 | * | |
3528 | * Compare types. Doing so prevents a RFP-originated | |
3529 | * route from matching an imported route, for example. | |
3530 | */ | |
3af8cb57 LB |
3531 | if (VNC_DEBUG(VERBOSE) && bi->type != type) |
3532 | /* should be handled by RDs, but warn for now */ | |
41fd9520 LB |
3533 | zlog_warn("%s: type mismatch! (bi=%d, arg=%d)", |
3534 | __func__, bi->type, type); | |
d62a17ae | 3535 | |
3536 | vnc_zlog_debug_verbose("%s: found matching bi", | |
3537 | __func__); | |
3538 | ||
3539 | /* | |
3540 | * In the special CE table, withdrawals occur without | |
3541 | * holddown | |
3542 | */ | |
3543 | if (import_table == bgp->rfapi->it_ce) { | |
3544 | vnc_direct_bgp_del_route_ce(bgp, rn, bi); | |
3545 | if (action == FIF_ACTION_WITHDRAW) | |
3546 | action = FIF_ACTION_KILL; | |
3547 | } | |
3548 | ||
3549 | if (action == FIF_ACTION_WITHDRAW) { | |
3550 | ||
3551 | int washolddown = | |
3552 | CHECK_FLAG(bi->flags, BGP_INFO_REMOVED); | |
3553 | ||
3554 | vnc_zlog_debug_verbose( | |
3555 | "%s: withdrawing at prefix %s/%d%s", | |
9d303b37 DL |
3556 | __func__, rfapi_ntop(rn->p.family, |
3557 | &rn->p.u.prefix, | |
3558 | buf, BUFSIZ), | |
d62a17ae | 3559 | rn->p.prefixlen, |
3560 | (washolddown | |
3561 | ? " (already being withdrawn)" | |
3562 | : "")); | |
3563 | ||
3564 | VNC_ITRCCK; | |
3565 | if (!washolddown) { | |
3566 | rfapiBiStartWithdrawTimer( | |
3567 | import_table, rn, bi, afi, | |
3568 | SAFI_MPLS_VPN, | |
3569 | rfapiWithdrawTimerVPN); | |
3570 | ||
3571 | RFAPI_UPDATE_ITABLE_COUNT( | |
3572 | bi, import_table, afi, -1); | |
3573 | import_table->holddown_count[afi] += 1; | |
3574 | } | |
3575 | VNC_ITRCCK; | |
3576 | } else { | |
3577 | vnc_zlog_debug_verbose( | |
3578 | "%s: %s at prefix %s/%d", __func__, | |
3579 | ((action == FIF_ACTION_KILL) | |
3580 | ? "killing" | |
3581 | : "replacing"), | |
3582 | rfapi_ntop(rn->p.family, | |
3583 | &rn->p.u.prefix, buf, | |
3584 | BUFSIZ), | |
3585 | rn->p.prefixlen); | |
3586 | ||
3587 | /* | |
3588 | * If this route is waiting to be deleted | |
3589 | * because of | |
3590 | * a previous withdraw, we must cancel its | |
3591 | * timer. | |
3592 | */ | |
3593 | if (CHECK_FLAG(bi->flags, BGP_INFO_REMOVED) | |
3594 | && bi->extra->vnc.import.timer) { | |
3595 | ||
3596 | struct thread *t = | |
3597 | (struct thread *)bi->extra->vnc | |
3598 | .import.timer; | |
3599 | struct rfapi_withdraw *wcb = t->arg; | |
3600 | ||
3601 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
3602 | thread_cancel(t); | |
3603 | ||
3604 | import_table->holddown_count[afi] -= 1; | |
3605 | RFAPI_UPDATE_ITABLE_COUNT( | |
3606 | bi, import_table, afi, 1); | |
3607 | } | |
3608 | /* | |
3609 | * decrement remote count (if route is remote) | |
3610 | * because | |
3611 | * we are going to remove it below | |
3612 | */ | |
3613 | RFAPI_UPDATE_ITABLE_COUNT(bi, import_table, afi, | |
3614 | -1); | |
3615 | if (action == FIF_ACTION_UPDATE) { | |
3616 | replacing = 1; | |
3617 | ||
3618 | /* | |
3619 | * make copy of original nexthop so we | |
3620 | * can see if it changed | |
3621 | */ | |
3622 | rfapiGetNexthop(bi->attr, | |
3623 | &original_nexthop); | |
3624 | ||
3625 | /* | |
3626 | * remove bi without doing any export | |
3627 | * processing | |
3628 | */ | |
3629 | if (CHECK_FLAG(bi->flags, | |
3630 | BGP_INFO_VALID) | |
3631 | && VALID_INTERIOR_TYPE(bi->type)) | |
3632 | RFAPI_MONITOR_EXTERIOR(rn) | |
3633 | ->valid_interior_count--; | |
3634 | rfapiItBiIndexDel(rn, bi); | |
3635 | rfapiBgpInfoDetach(rn, bi); | |
3636 | rfapiMonitorEncapDelete(bi); | |
3637 | vnc_import_bgp_exterior_del_route_interior( | |
3638 | bgp, import_table, rn, bi); | |
3639 | rfapiBgpInfoFree(bi); | |
3640 | } else { | |
3641 | /* Kill */ | |
3642 | /* | |
3643 | * remove bi and do export processing | |
3644 | */ | |
3645 | import_table->holddown_count[afi] += 1; | |
3646 | rfapiExpireVpnNow(import_table, rn, bi, | |
3647 | 0); | |
3648 | } | |
3649 | } | |
3650 | } | |
3651 | } | |
3652 | ||
3653 | if (rn) | |
3654 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, replacing ? 1 : 0); | |
3655 | ||
3656 | if (action == FIF_ACTION_WITHDRAW || action == FIF_ACTION_KILL) { | |
3657 | VNC_ITRCCK; | |
3658 | return; | |
3659 | } | |
3660 | ||
3661 | info_new = | |
3662 | rfapiBgpInfoCreate(attr, peer, rfd, prd, type, sub_type, label); | |
3663 | ||
3664 | /* | |
3665 | * lookup un address in encap table | |
3666 | */ | |
3667 | ern = route_node_match(import_table->imported_encap[afi], &vn_prefix); | |
3668 | if (ern) { | |
3669 | rfapiCopyUnEncap2VPN(ern->info, info_new); | |
3670 | route_unlock_node(ern); /* undo lock in route_note_match */ | |
3671 | } else { | |
872ed4c7 DS |
3672 | char buf[PREFIX_STRLEN]; |
3673 | ||
d62a17ae | 3674 | prefix2str(&vn_prefix, buf, sizeof(buf)); |
d62a17ae | 3675 | /* Not a big deal, just means VPN route got here first */ |
3676 | vnc_zlog_debug_verbose("%s: no encap route for vn addr %s", | |
3677 | __func__, buf); | |
3678 | info_new->extra->vnc.import.un_family = 0; | |
3679 | } | |
3680 | ||
3681 | if (rn) { | |
3682 | if (!replacing) | |
3683 | route_lock_node(rn); | |
3684 | } else { | |
3685 | /* | |
3686 | * No need to increment reference count, so only "get" | |
3687 | * if the node is not there already | |
3688 | */ | |
3689 | rn = route_node_get(rt, p); | |
3690 | } | |
3691 | ||
3692 | /* | |
3693 | * For ethernet routes, if there is an accompanying IP address, | |
3694 | * save it in the bi | |
3695 | */ | |
3696 | if ((AFI_L2VPN == afi) && aux_prefix) { | |
3697 | ||
3698 | vnc_zlog_debug_verbose("%s: setting BI's aux_prefix", __func__); | |
3699 | info_new->extra->vnc.import.aux_prefix = *aux_prefix; | |
3700 | } | |
3701 | ||
3702 | vnc_zlog_debug_verbose( | |
3703 | "%s: inserting bi %p at prefix %s/%d #%d", __func__, info_new, | |
3704 | rfapi_ntop(rn->p.family, &rn->p.u.prefix, buf, BUFSIZ), | |
3705 | rn->p.prefixlen, rn->lock); | |
3706 | ||
3707 | rfapiBgpInfoAttachSorted(rn, info_new, afi, SAFI_MPLS_VPN); | |
3708 | rfapiItBiIndexAdd(rn, info_new); | |
3709 | if (!rfapiGetUnAddrOfVpnBi(info_new, NULL)) { | |
3710 | if (VALID_INTERIOR_TYPE(info_new->type)) | |
3711 | RFAPI_MONITOR_EXTERIOR(rn)->valid_interior_count++; | |
3712 | SET_FLAG(info_new->flags, BGP_INFO_VALID); | |
3713 | } | |
3714 | RFAPI_UPDATE_ITABLE_COUNT(info_new, import_table, afi, 1); | |
3715 | vnc_import_bgp_exterior_add_route_interior(bgp, import_table, rn, | |
3716 | info_new); | |
3717 | ||
3718 | if (import_table == bgp->rfapi->it_ce) | |
3719 | vnc_direct_bgp_add_route_ce(bgp, rn, info_new); | |
3720 | ||
3721 | if (VNC_DEBUG(VERBOSE)) { | |
3722 | vnc_zlog_debug_verbose("%s: showing IT node", __func__); | |
3723 | rfapiShowItNode(NULL, rn); /* debug */ | |
3724 | } | |
3725 | ||
3726 | rfapiMonitorEncapAdd(import_table, &vn_prefix, rn, info_new); | |
3727 | ||
3728 | if (!rfapiGetUnAddrOfVpnBi(info_new, &un_prefix)) { | |
3729 | ||
3730 | /* | |
3731 | * if we have a valid UN address (either via Encap route | |
3732 | * or via tunnel attribute), then we should attempt | |
3733 | * to move any monitors at less-specific nodes to this node | |
3734 | */ | |
3735 | rfapiMonitorMoveLonger(rn); | |
3736 | ||
3737 | un_prefix_valid = 1; | |
3738 | } | |
3739 | ||
3740 | /* | |
3741 | * 101129 Enhancement: if we add a route (implication: it is not | |
3742 | * in holddown), delete all other routes from this nve at this | |
3743 | * node that are in holddown, regardless of peer. | |
3744 | * | |
3745 | * Reasons it's OK to do that: | |
3746 | * | |
3747 | * - if the holddown route being deleted originally came from BGP VPN, | |
3748 | * it is already gone from BGP (implication of holddown), so there | |
3749 | * won't be any added inconsistency with the BGP RIB. | |
3750 | * | |
3751 | * - once a fresh route is added at a prefix, any routes in holddown | |
3752 | * at that prefix will not show up in RFP responses, so deleting | |
3753 | * the holddown routes won't affect the contents of responses. | |
3754 | * | |
3755 | * - lifetimes are supposed to be consistent, so there should not | |
3756 | * be a case where the fresh route has a shorter lifetime than | |
3757 | * the holddown route, so we don't expect the fresh route to | |
3758 | * disappear and complete its holddown time before the existing | |
3759 | * holddown routes time out. Therefore, we won't have a situation | |
3760 | * where we expect the existing holddown routes to be hidden and | |
3761 | * then to reappear sometime later (as holddown routes) in a | |
3762 | * RFP response. | |
3763 | * | |
3764 | * Among other things, this would enable us to skirt the problem | |
3765 | * of local holddown routes that refer to NVE descriptors that | |
3766 | * have already been closed (if the same NVE triggers a subsequent | |
3767 | * rfapi_open(), the new peer is different and doesn't match the | |
3768 | * peer of the holddown route, so the stale holddown route still | |
3769 | * hangs around until it times out instead of just being replaced | |
3770 | * by the fresh route). | |
3771 | */ | |
3772 | /* | |
3773 | * We know that the new bi will have been inserted before any routes | |
3774 | * in holddown, so we can skip any that came before it | |
3775 | */ | |
3776 | for (bi = info_new->next; bi; bi = next) { | |
3777 | ||
3778 | struct prefix pfx_vn; | |
3779 | struct prefix pfx_un; | |
3780 | int un_match = 0; | |
3781 | int remote_peer_match = 0; | |
3782 | ||
3783 | next = bi->next; | |
3784 | ||
3785 | /* | |
3786 | * Must be holddown | |
3787 | */ | |
3788 | if (!CHECK_FLAG(bi->flags, BGP_INFO_REMOVED)) | |
3789 | continue; | |
3790 | ||
3791 | /* | |
3792 | * Must match VN address (nexthop of VPN route) | |
3793 | */ | |
3794 | if (rfapiGetNexthop(bi->attr, &pfx_vn)) | |
3795 | continue; | |
3796 | if (!prefix_same(&pfx_vn, &vn_prefix)) | |
3797 | continue; | |
3798 | ||
3799 | if (un_prefix_valid && /* new route UN addr */ | |
3800 | !rfapiGetUnAddrOfVpnBi(bi, &pfx_un) | |
3801 | && /* old route UN addr */ | |
3802 | prefix_same(&pfx_un, &un_prefix)) { /* compare */ | |
3803 | un_match = 1; | |
3804 | } | |
3805 | if (!RFAPI_LOCAL_BI(bi) && !RFAPI_LOCAL_BI(info_new) | |
3806 | && sockunion_same(&bi->peer->su, &info_new->peer->su)) { | |
3807 | /* old & new are both remote, same peer */ | |
3808 | remote_peer_match = 1; | |
3809 | } | |
3810 | ||
3811 | if (!un_match & !remote_peer_match) | |
3812 | continue; | |
3813 | ||
3814 | vnc_zlog_debug_verbose( | |
3815 | "%s: removing holddown bi matching NVE of new route", | |
3816 | __func__); | |
3817 | if (bi->extra->vnc.import.timer) { | |
3818 | struct thread *t = | |
3819 | (struct thread *)bi->extra->vnc.import.timer; | |
3820 | struct rfapi_withdraw *wcb = t->arg; | |
3821 | ||
3822 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
3823 | thread_cancel(t); | |
3824 | } | |
3825 | rfapiExpireVpnNow(import_table, rn, bi, 0); | |
3826 | } | |
3827 | ||
3828 | if (!original_had_routes) { | |
3829 | /* | |
3830 | * We went from 0 usable routes to 1 usable route. Perform the | |
3831 | * "Adding a Route" export process. | |
3832 | */ | |
3833 | vnc_direct_bgp_add_prefix(bgp, import_table, rn); | |
3834 | vnc_zebra_add_prefix(bgp, import_table, rn); | |
3835 | } else { | |
3836 | /* | |
3837 | * Check for nexthop change event | |
3838 | * Note: the prefix_same() test below detects two situations: | |
3839 | * 1. route is replaced, new route has different nexthop | |
3840 | * 2. new route is added (original_nexthop is 0) | |
3841 | */ | |
3842 | struct prefix new_nexthop; | |
3843 | ||
3844 | rfapiGetNexthop(attr, &new_nexthop); | |
3845 | if (!prefix_same(&original_nexthop, &new_nexthop)) { | |
3846 | /* | |
3847 | * nexthop change event | |
3848 | * vnc_direct_bgp_add_prefix() will recompute VN addr | |
3849 | * ecommunity | |
3850 | */ | |
3851 | vnc_direct_bgp_add_prefix(bgp, import_table, rn); | |
3852 | } | |
3853 | } | |
3854 | ||
3855 | if (!(bgp->rfapi_cfg->flags & BGP_VNC_CONFIG_CALLBACK_DISABLE)) { | |
3856 | for (n = rn; n; n = n->parent) { | |
3857 | // rfapiDoRouteCallback(import_table, n, NULL); | |
3858 | } | |
3859 | rfapiMonitorItNodeChanged(import_table, rn, NULL); | |
3860 | } | |
3861 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, 0); | |
3862 | VNC_ITRCCK; | |
65efcfce LB |
3863 | } |
3864 | ||
21cf6b21 VJ |
3865 | static void rfapiBgpInfoFilteredImportBadSafi( |
3866 | struct rfapi_import_table *import_table, int action, struct peer *peer, | |
3867 | void *rfd, /* set for looped back routes */ | |
3868 | struct prefix *p, | |
3869 | struct prefix *aux_prefix, /* AFI_L2VPN: optional IP */ | |
3870 | afi_t afi, struct prefix_rd *prd, | |
3871 | struct attr *attr, /* part of bgp_info */ | |
d7c0a89a QY |
3872 | uint8_t type, /* part of bgp_info */ |
3873 | uint8_t sub_type, /* part of bgp_info */ | |
21cf6b21 VJ |
3874 | uint32_t *label) /* part of bgp_info */ |
3875 | { | |
3876 | vnc_zlog_debug_verbose("%s: Error, bad safi", __func__); | |
3877 | } | |
3878 | ||
65efcfce | 3879 | static rfapi_bi_filtered_import_f * |
d62a17ae | 3880 | rfapiBgpInfoFilteredImportFunction(safi_t safi) |
65efcfce | 3881 | { |
d62a17ae | 3882 | switch (safi) { |
3883 | case SAFI_MPLS_VPN: | |
3884 | return rfapiBgpInfoFilteredImportVPN; | |
3885 | ||
3886 | case SAFI_ENCAP: | |
3887 | return rfapiBgpInfoFilteredImportEncap; | |
5c525538 RW |
3888 | |
3889 | default: | |
3890 | /* not expected */ | |
0af35d90 | 3891 | zlog_err("%s: bad safi %d", __func__, safi); |
21cf6b21 | 3892 | return rfapiBgpInfoFilteredImportBadSafi; |
d62a17ae | 3893 | } |
65efcfce LB |
3894 | } |
3895 | ||
d62a17ae | 3896 | void rfapiProcessUpdate(struct peer *peer, |
3897 | void *rfd, /* set when looped from RFP/RFAPI */ | |
3898 | struct prefix *p, struct prefix_rd *prd, | |
d7c0a89a QY |
3899 | struct attr *attr, afi_t afi, safi_t safi, uint8_t type, |
3900 | uint8_t sub_type, uint32_t *label) | |
65efcfce | 3901 | { |
d62a17ae | 3902 | struct bgp *bgp; |
3903 | struct rfapi *h; | |
3904 | struct rfapi_import_table *it; | |
3905 | int has_ip_route = 1; | |
3906 | uint32_t lni = 0; | |
3907 | ||
3908 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
3909 | assert(bgp); | |
3910 | ||
3911 | h = bgp->rfapi; | |
3912 | assert(h); | |
3913 | ||
3914 | /* | |
3915 | * look at high-order byte of RD. FF means MAC | |
3916 | * address is present (VNC L2VPN) | |
3917 | */ | |
3918 | if ((safi == SAFI_MPLS_VPN) | |
3919 | && (decode_rd_type(prd->val) == RD_TYPE_VNC_ETH)) { | |
3920 | struct prefix pfx_mac_buf; | |
3921 | struct prefix pfx_nexthop_buf; | |
3922 | int rc; | |
3923 | ||
3924 | /* | |
3925 | * Set flag if prefix and nexthop are the same - don't | |
3926 | * add the route to normal IP-based import tables | |
3927 | */ | |
3928 | if (!rfapiGetNexthop(attr, &pfx_nexthop_buf)) { | |
3929 | if (!prefix_cmp(&pfx_nexthop_buf, p)) { | |
3930 | has_ip_route = 0; | |
3931 | } | |
3932 | } | |
3933 | ||
3934 | memset(&pfx_mac_buf, 0, sizeof(pfx_mac_buf)); | |
3935 | pfx_mac_buf.family = AF_ETHERNET; | |
3936 | pfx_mac_buf.prefixlen = 48; | |
3937 | memcpy(&pfx_mac_buf.u.prefix_eth.octet, prd->val + 2, 6); | |
3938 | ||
3939 | /* | |
3940 | * Find rt containing LNI (Logical Network ID), which | |
3941 | * _should_ always be present when mac address is present | |
3942 | */ | |
3943 | rc = rfapiEcommunityGetLNI(attr->ecommunity, &lni); | |
3944 | ||
3945 | vnc_zlog_debug_verbose( | |
3946 | "%s: rfapiEcommunityGetLNI returned %d, lni=%d, attr=%p", | |
3947 | __func__, rc, lni, attr); | |
8cea9547 | 3948 | if (!rc) { |
d62a17ae | 3949 | it = rfapiMacImportTableGet(bgp, lni); |
3950 | ||
3951 | rfapiBgpInfoFilteredImportVPN( | |
3952 | it, FIF_ACTION_UPDATE, peer, rfd, | |
3953 | &pfx_mac_buf, /* prefix */ | |
3954 | p, /* aux prefix: IP addr */ | |
3955 | AFI_L2VPN, prd, attr, type, sub_type, label); | |
3956 | } | |
3957 | } | |
3958 | ||
3959 | if (!has_ip_route) | |
3960 | return; | |
3961 | ||
3962 | /* | |
3963 | * Iterate over all import tables; do a filtered import | |
3964 | * for the afi/safi combination | |
3965 | */ | |
3966 | for (it = h->imports; it; it = it->next) { | |
3967 | (*rfapiBgpInfoFilteredImportFunction(safi))( | |
3968 | it, FIF_ACTION_UPDATE, peer, rfd, p, /* prefix */ | |
3969 | NULL, afi, prd, attr, type, sub_type, label); | |
3970 | } | |
3971 | ||
3972 | if (safi == SAFI_MPLS_VPN) { | |
3973 | vnc_direct_bgp_rh_add_route(bgp, afi, p, peer, attr); | |
d62a17ae | 3974 | rfapiBgpInfoFilteredImportVPN( |
3975 | bgp->rfapi->it_ce, FIF_ACTION_UPDATE, peer, rfd, | |
3976 | p, /* prefix */ | |
3977 | NULL, afi, prd, attr, type, sub_type, label); | |
3978 | } | |
65efcfce LB |
3979 | } |
3980 | ||
3981 | ||
d62a17ae | 3982 | void rfapiProcessWithdraw(struct peer *peer, void *rfd, struct prefix *p, |
3983 | struct prefix_rd *prd, struct attr *attr, afi_t afi, | |
d7c0a89a | 3984 | safi_t safi, uint8_t type, int kill) |
65efcfce | 3985 | { |
d62a17ae | 3986 | struct bgp *bgp; |
3987 | struct rfapi *h; | |
3988 | struct rfapi_import_table *it; | |
3989 | ||
3990 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
3991 | assert(bgp); | |
3992 | ||
3993 | h = bgp->rfapi; | |
3994 | assert(h); | |
3995 | ||
3996 | /* | |
3997 | * look at high-order byte of RD. FF means MAC | |
3998 | * address is present (VNC L2VPN) | |
3999 | */ | |
4000 | if (h->import_mac != NULL && safi == SAFI_MPLS_VPN | |
4001 | && decode_rd_type(prd->val) == RD_TYPE_VNC_ETH) { | |
4002 | struct prefix pfx_mac_buf; | |
4003 | void *cursor = NULL; | |
4004 | int rc; | |
4005 | ||
4006 | memset(&pfx_mac_buf, 0, sizeof(pfx_mac_buf)); | |
4007 | pfx_mac_buf.family = AF_ETHERNET; | |
4008 | pfx_mac_buf.prefixlen = 48; | |
4009 | memcpy(&pfx_mac_buf.u.prefix_eth, prd->val + 2, 6); | |
4010 | ||
4011 | /* | |
4012 | * withdraw does not contain attrs, so we don't have | |
4013 | * access to the route's LNI, which would ordinarily | |
4014 | * select the specific mac-based import table. Instead, | |
4015 | * we must iterate over all mac-based tables and rely | |
4016 | * on the RD to match. | |
4017 | * | |
4018 | * If this approach is too slow, add an index where | |
4019 | * key is {RD, peer} and value is the import table | |
4020 | */ | |
4021 | for (rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4022 | &cursor); | |
4023 | rc == 0; rc = skiplist_next(h->import_mac, NULL, | |
4024 | (void **)&it, &cursor)) { | |
65efcfce LB |
4025 | |
4026 | #if DEBUG_L2_EXTRA | |
d62a17ae | 4027 | vnc_zlog_debug_verbose( |
4028 | "%s: calling rfapiBgpInfoFilteredImportVPN(it=%p, afi=AFI_L2VPN)", | |
4029 | __func__, it); | |
65efcfce LB |
4030 | #endif |
4031 | ||
d62a17ae | 4032 | rfapiBgpInfoFilteredImportVPN( |
4033 | it, | |
4034 | (kill ? FIF_ACTION_KILL : FIF_ACTION_WITHDRAW), | |
4035 | peer, rfd, &pfx_mac_buf, /* prefix */ | |
4036 | p, /* aux_prefix: IP */ | |
4037 | AFI_L2VPN, prd, attr, type, 0, | |
4038 | NULL); /* sub_type & label unused for withdraw | |
9d303b37 | 4039 | */ |
d62a17ae | 4040 | } |
4041 | } | |
4042 | ||
4043 | /* | |
4044 | * XXX For the case where the withdraw involves an L2 | |
4045 | * route with no IP information, we rely on the lack | |
4046 | * of RT-list intersection to filter out the withdraw | |
4047 | * from the IP-based import tables below | |
4048 | */ | |
4049 | ||
4050 | /* | |
4051 | * Iterate over all import tables; do a filtered import | |
4052 | * for the afi/safi combination | |
4053 | */ | |
4054 | ||
4055 | for (it = h->imports; it; it = it->next) { | |
4056 | (*rfapiBgpInfoFilteredImportFunction(safi))( | |
4057 | it, (kill ? FIF_ACTION_KILL : FIF_ACTION_WITHDRAW), | |
4058 | peer, rfd, p, /* prefix */ | |
4059 | NULL, afi, prd, attr, type, 0, | |
4060 | NULL); /* sub_type & label unused for withdraw */ | |
4061 | } | |
4062 | ||
4063 | /* TBD the deletion should happen after the lifetime expires */ | |
4064 | if (safi == SAFI_MPLS_VPN) | |
4065 | vnc_direct_bgp_rh_del_route(bgp, afi, p, peer); | |
4066 | ||
4067 | if (safi == SAFI_MPLS_VPN) { | |
4068 | rfapiBgpInfoFilteredImportVPN( | |
4069 | bgp->rfapi->it_ce, | |
4070 | (kill ? FIF_ACTION_KILL : FIF_ACTION_WITHDRAW), peer, | |
4071 | rfd, p, /* prefix */ | |
4072 | NULL, afi, prd, attr, type, 0, | |
4073 | NULL); /* sub_type & label unused for withdraw */ | |
4074 | } | |
65efcfce LB |
4075 | } |
4076 | ||
4077 | /* | |
4078 | * TBD optimized withdraw timer algorithm for case of many | |
4079 | * routes expiring at the same time due to peer drop. | |
4080 | */ | |
4081 | /* | |
4082 | * 1. Visit all BIs in all ENCAP import tables. | |
4083 | * | |
4084 | * a. If a bi's peer is the failed peer, remove the bi. | |
4085 | * b. If the removed ENCAP bi was first in the list of | |
4086 | * BIs at this ENCAP node, loop over all monitors | |
4087 | * at this node: | |
4088 | * | |
4089 | * (1) for each ENCAP monitor, loop over all its | |
4090 | * VPN node monitors and set their RFAPI_MON_FLAG_NEEDCALLBACK | |
4091 | * flags. | |
4092 | * | |
4093 | * 2. Visit all BIs in all VPN import tables. | |
4094 | * a. If a bi's peer is the failed peer, remove the bi. | |
4095 | * b. loop over all the VPN node monitors and set their | |
4096 | * RFAPI_MON_FLAG_NEEDCALLBACK flags | |
4097 | * c. If there are no BIs left at this VPN node, | |
4098 | * | |
4099 | */ | |
4100 | ||
4101 | ||
4102 | /* surprise, this gets called from peer_delete(), from rfapi_close() */ | |
d62a17ae | 4103 | static void rfapiProcessPeerDownRt(struct peer *peer, |
4104 | struct rfapi_import_table *import_table, | |
4105 | afi_t afi, safi_t safi) | |
65efcfce | 4106 | { |
d62a17ae | 4107 | struct route_node *rn; |
4108 | struct bgp_info *bi; | |
4109 | struct route_table *rt; | |
4110 | int (*timer_service_func)(struct thread *); | |
4111 | ||
4112 | assert(afi == AFI_IP || afi == AFI_IP6); | |
4113 | ||
4114 | VNC_ITRCCK; | |
4115 | ||
4116 | switch (safi) { | |
4117 | case SAFI_MPLS_VPN: | |
4118 | rt = import_table->imported_vpn[afi]; | |
4119 | timer_service_func = rfapiWithdrawTimerVPN; | |
4120 | break; | |
4121 | case SAFI_ENCAP: | |
4122 | rt = import_table->imported_encap[afi]; | |
4123 | timer_service_func = rfapiWithdrawTimerEncap; | |
4124 | break; | |
4125 | default: | |
4126 | assert(0); | |
4127 | } | |
4128 | ||
4129 | ||
4130 | for (rn = route_top(rt); rn; rn = route_next(rn)) { | |
4131 | for (bi = rn->info; bi; bi = bi->next) { | |
4132 | if (bi->peer == peer) { | |
4133 | ||
4134 | if (CHECK_FLAG(bi->flags, BGP_INFO_REMOVED)) { | |
4135 | /* already in holddown, skip */ | |
4136 | continue; | |
4137 | } | |
4138 | ||
4139 | if (safi == SAFI_MPLS_VPN) { | |
4140 | RFAPI_UPDATE_ITABLE_COUNT( | |
4141 | bi, import_table, afi, -1); | |
4142 | import_table->holddown_count[afi] += 1; | |
4143 | } | |
4144 | rfapiBiStartWithdrawTimer(import_table, rn, bi, | |
4145 | afi, safi, | |
4146 | timer_service_func); | |
4147 | } | |
4148 | } | |
4149 | } | |
4150 | VNC_ITRCCK; | |
65efcfce LB |
4151 | } |
4152 | ||
d62a17ae | 4153 | /* |
65efcfce LB |
4154 | * This gets called when a peer connection drops. We have to remove |
4155 | * all the routes from this peer. | |
4156 | * | |
4157 | * Current approach is crude. TBD Optimize by setting fewer timers and | |
4158 | * grouping withdrawn routes so we can generate callbacks more | |
4159 | * efficiently. | |
4160 | */ | |
d62a17ae | 4161 | void rfapiProcessPeerDown(struct peer *peer) |
65efcfce | 4162 | { |
d62a17ae | 4163 | struct bgp *bgp; |
4164 | struct rfapi *h; | |
4165 | struct rfapi_import_table *it; | |
4166 | ||
4167 | /* | |
4168 | * If this peer is a "dummy" peer structure atached to a RFAPI | |
4169 | * nve_descriptor, we don't need to walk the import tables | |
4170 | * because the routes are already withdrawn by rfapi_close() | |
4171 | */ | |
4172 | if (CHECK_FLAG(peer->flags, PEER_FLAG_IS_RFAPI_HD)) | |
4173 | return; | |
4174 | ||
4175 | /* | |
4176 | * 1. Visit all BIs in all ENCAP import tables. | |
4177 | * Start withdraw timer on the BIs that match peer. | |
4178 | * | |
4179 | * 2. Visit All BIs in all VPN import tables. | |
4180 | * Start withdraw timer on the BIs that match peer. | |
4181 | */ | |
4182 | ||
4183 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
4184 | if (!bgp) | |
4185 | return; | |
4186 | ||
4187 | h = bgp->rfapi; | |
4188 | assert(h); | |
4189 | ||
4190 | for (it = h->imports; it; it = it->next) { | |
4191 | rfapiProcessPeerDownRt(peer, it, AFI_IP, SAFI_ENCAP); | |
4192 | rfapiProcessPeerDownRt(peer, it, AFI_IP6, SAFI_ENCAP); | |
4193 | rfapiProcessPeerDownRt(peer, it, AFI_IP, SAFI_MPLS_VPN); | |
4194 | rfapiProcessPeerDownRt(peer, it, AFI_IP6, SAFI_MPLS_VPN); | |
4195 | } | |
4196 | ||
4197 | if (h->it_ce) { | |
4198 | rfapiProcessPeerDownRt(peer, h->it_ce, AFI_IP, SAFI_MPLS_VPN); | |
4199 | rfapiProcessPeerDownRt(peer, h->it_ce, AFI_IP6, SAFI_MPLS_VPN); | |
4200 | } | |
65efcfce LB |
4201 | } |
4202 | ||
4203 | /* | |
4204 | * Import an entire RIB (for an afi/safi) to an import table RIB, | |
4205 | * filtered according to the import table's RT list | |
4206 | * | |
4207 | * TBD: does this function need additions to match rfapiProcessUpdate() | |
d62a17ae | 4208 | * for, e.g., L2 handling? |
65efcfce | 4209 | */ |
d62a17ae | 4210 | static void rfapiBgpTableFilteredImport(struct bgp *bgp, |
4211 | struct rfapi_import_table *it, | |
4212 | afi_t afi, safi_t safi) | |
65efcfce | 4213 | { |
d62a17ae | 4214 | struct bgp_node *rn1; |
4215 | struct bgp_node *rn2; | |
4216 | ||
4217 | /* Only these SAFIs have 2-level RIBS */ | |
4218 | assert(safi == SAFI_MPLS_VPN || safi == SAFI_ENCAP); | |
4219 | ||
4220 | /* | |
4221 | * Now visit all the rd nodes and the nodes of all the | |
4222 | * route tables attached to them, and import the routes | |
4223 | * if they have matching route targets | |
4224 | */ | |
4225 | for (rn1 = bgp_table_top(bgp->rib[afi][safi]); rn1; | |
4226 | rn1 = bgp_route_next(rn1)) { | |
4227 | ||
4228 | if (rn1->info) { | |
4229 | for (rn2 = bgp_table_top(rn1->info); rn2; | |
4230 | rn2 = bgp_route_next(rn2)) { | |
4231 | ||
4232 | struct bgp_info *bi; | |
4233 | ||
4234 | for (bi = rn2->info; bi; bi = bi->next) { | |
d7c0a89a | 4235 | uint32_t label = 0; |
d62a17ae | 4236 | |
4237 | if (CHECK_FLAG(bi->flags, | |
4238 | BGP_INFO_REMOVED)) | |
4239 | continue; | |
4240 | ||
4241 | if (bi->extra) | |
4242 | label = decode_label( | |
317f1fe0 | 4243 | &bi->extra->label[0]); |
d62a17ae | 4244 | (*rfapiBgpInfoFilteredImportFunction( |
4245 | safi))( | |
4246 | it, /* which import table */ | |
4247 | FIF_ACTION_UPDATE, bi->peer, | |
4248 | NULL, &rn2->p, /* prefix */ | |
4249 | NULL, afi, | |
4250 | (struct prefix_rd *)&rn1->p, | |
4251 | bi->attr, bi->type, | |
4252 | bi->sub_type, &label); | |
4253 | } | |
4254 | } | |
4255 | } | |
4256 | } | |
65efcfce LB |
4257 | } |
4258 | ||
4259 | ||
4260 | /* per-bgp-instance rfapi data */ | |
d62a17ae | 4261 | struct rfapi *bgp_rfapi_new(struct bgp *bgp) |
65efcfce | 4262 | { |
d62a17ae | 4263 | struct rfapi *h; |
e7038dde | 4264 | afi_t afi; |
d62a17ae | 4265 | struct rfapi_rfp_cfg *cfg = NULL; |
4266 | struct rfapi_rfp_cb_methods *cbm = NULL; | |
4267 | ||
4268 | assert(bgp->rfapi_cfg == NULL); | |
4269 | ||
4270 | h = (struct rfapi *)XCALLOC(MTYPE_RFAPI, sizeof(struct rfapi)); | |
4271 | ||
4272 | for (afi = AFI_IP; afi < AFI_MAX; afi++) { | |
0ae6124f | 4273 | h->un[afi] = route_table_init(); |
d62a17ae | 4274 | } |
4275 | ||
4276 | /* | |
4277 | * initialize the ce import table | |
4278 | */ | |
4279 | h->it_ce = XCALLOC(MTYPE_RFAPI_IMPORTTABLE, | |
4280 | sizeof(struct rfapi_import_table)); | |
4281 | h->it_ce->imported_vpn[AFI_IP] = route_table_init(); | |
4282 | h->it_ce->imported_vpn[AFI_IP6] = route_table_init(); | |
4283 | h->it_ce->imported_encap[AFI_IP] = route_table_init(); | |
4284 | h->it_ce->imported_encap[AFI_IP6] = route_table_init(); | |
4285 | rfapiBgpTableFilteredImport(bgp, h->it_ce, AFI_IP, SAFI_MPLS_VPN); | |
4286 | rfapiBgpTableFilteredImport(bgp, h->it_ce, AFI_IP6, SAFI_MPLS_VPN); | |
4287 | ||
4288 | /* | |
4289 | * Set up work queue for deferred rfapi_close operations | |
4290 | */ | |
4291 | h->deferred_close_q = | |
4292 | work_queue_new(bm->master, "rfapi deferred close"); | |
4293 | h->deferred_close_q->spec.workfunc = rfapi_deferred_close_workfunc; | |
4294 | h->deferred_close_q->spec.data = h; | |
4295 | ||
4296 | h->rfp = rfp_start(bm->master, &cfg, &cbm); | |
4297 | bgp->rfapi_cfg = bgp_rfapi_cfg_new(cfg); | |
4298 | if (cbm != NULL) { | |
4299 | h->rfp_methods = *cbm; | |
4300 | } | |
4301 | return h; | |
65efcfce LB |
4302 | } |
4303 | ||
d62a17ae | 4304 | void bgp_rfapi_destroy(struct bgp *bgp, struct rfapi *h) |
65efcfce | 4305 | { |
e7038dde | 4306 | afi_t afi; |
0ae6124f | 4307 | |
d62a17ae | 4308 | if (bgp == NULL || h == NULL) |
4309 | return; | |
4310 | ||
4311 | if (h->resolve_nve_nexthop) { | |
4312 | skiplist_free(h->resolve_nve_nexthop); | |
4313 | h->resolve_nve_nexthop = NULL; | |
4314 | } | |
4315 | ||
4316 | route_table_finish(h->it_ce->imported_vpn[AFI_IP]); | |
4317 | route_table_finish(h->it_ce->imported_vpn[AFI_IP6]); | |
4318 | route_table_finish(h->it_ce->imported_encap[AFI_IP]); | |
4319 | route_table_finish(h->it_ce->imported_encap[AFI_IP6]); | |
4320 | ||
4321 | if (h->import_mac) { | |
4322 | struct rfapi_import_table *it; | |
4323 | void *cursor; | |
4324 | int rc; | |
4325 | ||
9d303b37 DL |
4326 | for (cursor = NULL, |
4327 | rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4328 | &cursor); | |
d62a17ae | 4329 | !rc; rc = skiplist_next(h->import_mac, NULL, (void **)&it, |
4330 | &cursor)) { | |
4331 | ||
4332 | rfapiImportTableFlush(it); | |
4333 | XFREE(MTYPE_RFAPI_IMPORTTABLE, it); | |
4334 | } | |
4335 | skiplist_free(h->import_mac); | |
4336 | h->import_mac = NULL; | |
4337 | } | |
4338 | ||
e208c8f9 | 4339 | work_queue_free_and_null(&h->deferred_close_q); |
d62a17ae | 4340 | |
4341 | if (h->rfp != NULL) | |
4342 | rfp_stop(h->rfp); | |
0ae6124f LB |
4343 | |
4344 | for (afi = AFI_IP; afi < AFI_MAX; afi++) { | |
4345 | route_table_finish(h->un[afi]); | |
4346 | } | |
4347 | ||
d62a17ae | 4348 | XFREE(MTYPE_RFAPI_IMPORTTABLE, h->it_ce); |
4349 | XFREE(MTYPE_RFAPI, h); | |
65efcfce LB |
4350 | } |
4351 | ||
4352 | struct rfapi_import_table * | |
d62a17ae | 4353 | rfapiImportTableRefAdd(struct bgp *bgp, struct ecommunity *rt_import_list, |
4354 | struct rfapi_nve_group_cfg *rfg) | |
65efcfce | 4355 | { |
d62a17ae | 4356 | struct rfapi *h; |
4357 | struct rfapi_import_table *it; | |
4358 | afi_t afi; | |
4359 | ||
4360 | h = bgp->rfapi; | |
4361 | assert(h); | |
4362 | ||
4363 | for (it = h->imports; it; it = it->next) { | |
4364 | if (ecommunity_cmp(it->rt_import_list, rt_import_list)) | |
4365 | break; | |
4366 | } | |
4367 | ||
4368 | vnc_zlog_debug_verbose("%s: matched it=%p", __func__, it); | |
4369 | ||
4370 | if (!it) { | |
4371 | it = XCALLOC(MTYPE_RFAPI_IMPORTTABLE, | |
4372 | sizeof(struct rfapi_import_table)); | |
4373 | assert(it); | |
4374 | it->next = h->imports; | |
4375 | h->imports = it; | |
4376 | ||
4377 | it->rt_import_list = ecommunity_dup(rt_import_list); | |
4378 | it->rfg = rfg; | |
4379 | it->monitor_exterior_orphans = | |
4380 | skiplist_new(0, NULL, (void (*)(void *))prefix_free); | |
4381 | ||
4382 | /* | |
4383 | * fill import route tables from RIBs | |
4384 | * | |
4385 | * Potential area for optimization. If this occurs when | |
4386 | * tables are large (e.g., the operator adds a nve group | |
4387 | * with a new RT list to a running system), it could take | |
4388 | * a while. | |
4389 | * | |
4390 | */ | |
4391 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
4392 | ||
4393 | it->imported_vpn[afi] = route_table_init(); | |
4394 | it->imported_encap[afi] = route_table_init(); | |
4395 | ||
4396 | rfapiBgpTableFilteredImport(bgp, it, afi, | |
4397 | SAFI_MPLS_VPN); | |
4398 | rfapiBgpTableFilteredImport(bgp, it, afi, SAFI_ENCAP); | |
4399 | ||
4400 | vnc_import_bgp_exterior_redist_enable_it(bgp, afi, it); | |
4401 | } | |
4402 | } | |
4403 | ||
4404 | it->refcount += 1; | |
4405 | ||
4406 | return it; | |
65efcfce LB |
4407 | } |
4408 | ||
4409 | /* | |
4410 | * skiplist element free function | |
4411 | */ | |
d62a17ae | 4412 | static void delete_rem_pfx_na_free(void *na) |
65efcfce | 4413 | { |
d62a17ae | 4414 | uint32_t *pCounter = ((struct rfapi_nve_addr *)na)->info; |
65efcfce | 4415 | |
d62a17ae | 4416 | *pCounter += 1; |
4417 | XFREE(MTYPE_RFAPI_NVE_ADDR, na); | |
65efcfce LB |
4418 | } |
4419 | ||
4420 | /* | |
4421 | * Common deleter for IP and MAC import tables | |
4422 | */ | |
d62a17ae | 4423 | static void rfapiDeleteRemotePrefixesIt( |
4424 | struct bgp *bgp, struct rfapi_import_table *it, struct prefix *un, | |
4425 | struct prefix *vn, struct prefix *p, int delete_active, | |
4426 | int delete_holddown, uint32_t *pARcount, uint32_t *pAHcount, | |
4427 | uint32_t *pHRcount, uint32_t *pHHcount, | |
4428 | struct skiplist *uniq_active_nves, struct skiplist *uniq_holddown_nves) | |
65efcfce | 4429 | { |
d62a17ae | 4430 | afi_t afi; |
65efcfce LB |
4431 | |
4432 | #if DEBUG_L2_EXTRA | |
d62a17ae | 4433 | { |
872ed4c7 | 4434 | char buf_pfx[PREFIX_STRLEN]; |
d62a17ae | 4435 | |
4436 | if (p) { | |
872ed4c7 | 4437 | prefix2str(p, buf_pfx, sizeof(buf_pfx)); |
d62a17ae | 4438 | } else { |
4439 | buf_pfx[0] = '*'; | |
4440 | buf_pfx[1] = 0; | |
4441 | } | |
4442 | ||
4443 | vnc_zlog_debug_verbose( | |
4444 | "%s: entry, p=%s, delete_active=%d, delete_holddown=%d", | |
4445 | __func__, buf_pfx, delete_active, delete_holddown); | |
4446 | } | |
65efcfce LB |
4447 | #endif |
4448 | ||
d62a17ae | 4449 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { |
4450 | ||
4451 | struct route_table *rt; | |
4452 | struct route_node *rn; | |
4453 | ||
4454 | if (p && (family2afi(p->family) != afi)) { | |
4455 | continue; | |
4456 | } | |
4457 | ||
4458 | rt = it->imported_vpn[afi]; | |
4459 | if (!rt) | |
4460 | continue; | |
4461 | ||
4462 | vnc_zlog_debug_verbose("%s: scanning rt for afi=%d", __func__, | |
4463 | afi); | |
4464 | ||
4465 | for (rn = route_top(rt); rn; rn = route_next(rn)) { | |
4466 | struct bgp_info *bi; | |
4467 | struct bgp_info *next; | |
4468 | ||
4469 | if (VNC_DEBUG(IMPORT_DEL_REMOTE)) { | |
872ed4c7 DS |
4470 | char p1line[PREFIX_STRLEN]; |
4471 | char p2line[PREFIX_STRLEN]; | |
d62a17ae | 4472 | |
872ed4c7 DS |
4473 | prefix2str(p, p1line, sizeof(p1line)); |
4474 | prefix2str(&rn->p, p2line, sizeof(p2line)); | |
d62a17ae | 4475 | vnc_zlog_debug_any("%s: want %s, have %s", |
4476 | __func__, p1line, p2line); | |
4477 | } | |
4478 | ||
4479 | if (p && prefix_cmp(p, &rn->p)) | |
4480 | continue; | |
4481 | ||
4482 | { | |
872ed4c7 DS |
4483 | char buf_pfx[PREFIX_STRLEN]; |
4484 | ||
4485 | prefix2str(&rn->p, buf_pfx, sizeof(buf_pfx)); | |
d62a17ae | 4486 | vnc_zlog_debug_verbose("%s: rn pfx=%s", |
4487 | __func__, buf_pfx); | |
4488 | } | |
4489 | ||
4490 | /* TBD is this valid for afi == AFI_L2VPN? */ | |
4491 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, 1); | |
4492 | ||
4493 | for (bi = rn->info; bi; bi = next) { | |
4494 | next = bi->next; | |
4495 | ||
4496 | struct prefix qpt; | |
4497 | struct prefix qct; | |
4498 | int qpt_valid = 0; | |
4499 | int qct_valid = 0; | |
4500 | int is_active = 0; | |
4501 | ||
4502 | vnc_zlog_debug_verbose("%s: examining bi %p", | |
4503 | __func__, bi); | |
4504 | ||
4505 | if (bi->attr) { | |
4506 | if (!rfapiGetNexthop(bi->attr, &qpt)) | |
4507 | qpt_valid = 1; | |
4508 | } | |
4509 | if (vn) { | |
4510 | if (!qpt_valid | |
4511 | || !prefix_match(vn, &qpt)) { | |
65efcfce | 4512 | #if DEBUG_L2_EXTRA |
d62a17ae | 4513 | vnc_zlog_debug_verbose( |
4514 | "%s: continue at vn && !qpt_valid || !prefix_match(vn, &qpt)", | |
4515 | __func__); | |
65efcfce | 4516 | #endif |
d62a17ae | 4517 | continue; |
4518 | } | |
4519 | } | |
65efcfce | 4520 | |
d62a17ae | 4521 | if (!rfapiGetUnAddrOfVpnBi(bi, &qct)) |
4522 | qct_valid = 1; | |
65efcfce | 4523 | |
d62a17ae | 4524 | if (un) { |
4525 | if (!qct_valid | |
4526 | || !prefix_match(un, &qct)) { | |
65efcfce | 4527 | #if DEBUG_L2_EXTRA |
d62a17ae | 4528 | vnc_zlog_debug_verbose( |
4529 | "%s: continue at un && !qct_valid || !prefix_match(un, &qct)", | |
4530 | __func__); | |
65efcfce | 4531 | #endif |
d62a17ae | 4532 | continue; |
4533 | } | |
4534 | } | |
4535 | ||
4536 | ||
4537 | /* | |
4538 | * Blow bi away | |
4539 | */ | |
4540 | /* | |
4541 | * If this route is waiting to be deleted | |
4542 | * because of | |
4543 | * a previous withdraw, we must cancel its | |
4544 | * timer. | |
4545 | */ | |
4546 | if (CHECK_FLAG(bi->flags, BGP_INFO_REMOVED)) { | |
4547 | if (!delete_holddown) | |
4548 | continue; | |
4549 | if (bi->extra->vnc.import.timer) { | |
4550 | ||
4551 | struct thread *t = | |
4552 | (struct thread *)bi | |
4553 | ->extra->vnc | |
4554 | .import.timer; | |
4555 | struct rfapi_withdraw *wcb = | |
4556 | t->arg; | |
4557 | ||
4558 | wcb->import_table | |
4559 | ->holddown_count[afi] -= | |
4560 | 1; | |
4561 | RFAPI_UPDATE_ITABLE_COUNT( | |
4562 | bi, wcb->import_table, | |
4563 | afi, 1); | |
4564 | XFREE(MTYPE_RFAPI_WITHDRAW, | |
4565 | wcb); | |
4566 | thread_cancel(t); | |
4567 | } | |
4568 | } else { | |
4569 | if (!delete_active) | |
4570 | continue; | |
4571 | is_active = 1; | |
4572 | } | |
4573 | ||
4574 | vnc_zlog_debug_verbose( | |
4575 | "%s: deleting bi %p (qct_valid=%d, qpt_valid=%d, delete_holddown=%d, delete_active=%d)", | |
4576 | __func__, bi, qct_valid, qpt_valid, | |
4577 | delete_holddown, delete_active); | |
4578 | ||
4579 | ||
4580 | /* | |
4581 | * add nve to list | |
4582 | */ | |
4583 | if (qct_valid && qpt_valid) { | |
4584 | ||
4585 | struct rfapi_nve_addr na; | |
4586 | struct rfapi_nve_addr *nap; | |
4587 | ||
4588 | memset(&na, 0, sizeof(na)); | |
4589 | assert(!rfapiQprefix2Raddr(&qct, | |
4590 | &na.un)); | |
4591 | assert(!rfapiQprefix2Raddr(&qpt, | |
4592 | &na.vn)); | |
4593 | ||
4594 | if (skiplist_search( | |
4595 | (is_active | |
4596 | ? uniq_active_nves | |
4597 | : uniq_holddown_nves), | |
4598 | &na, (void **)&nap)) { | |
4599 | char line[BUFSIZ]; | |
4600 | ||
4601 | nap = XCALLOC( | |
4602 | MTYPE_RFAPI_NVE_ADDR, | |
4603 | sizeof(struct | |
4604 | rfapi_nve_addr)); | |
4605 | assert(nap); | |
4606 | *nap = na; | |
4607 | nap->info = is_active | |
4608 | ? pAHcount | |
4609 | : pHHcount; | |
4610 | skiplist_insert( | |
4611 | (is_active | |
4612 | ? uniq_active_nves | |
4613 | : uniq_holddown_nves), | |
4614 | nap, nap); | |
4615 | ||
4616 | rfapiNveAddr2Str(nap, line, | |
4617 | BUFSIZ); | |
4618 | } | |
4619 | } | |
4620 | ||
4621 | vnc_direct_bgp_rh_del_route(bgp, afi, &rn->p, | |
4622 | bi->peer); | |
4623 | ||
4624 | RFAPI_UPDATE_ITABLE_COUNT(bi, it, afi, -1); | |
4625 | it->holddown_count[afi] += 1; | |
4626 | rfapiExpireVpnNow(it, rn, bi, 1); | |
4627 | ||
4628 | vnc_zlog_debug_verbose( | |
4629 | "%s: incrementing count (is_active=%d)", | |
4630 | __func__, is_active); | |
4631 | ||
4632 | if (is_active) | |
4633 | ++*pARcount; | |
4634 | else | |
4635 | ++*pHRcount; | |
4636 | } | |
4637 | } | |
4638 | } | |
65efcfce LB |
4639 | } |
4640 | ||
4641 | ||
4642 | /* | |
4643 | * For use by the "clear vnc prefixes" command | |
4644 | */ | |
4645 | /*------------------------------------------ | |
4646 | * rfapiDeleteRemotePrefixes | |
4647 | * | |
4648 | * UI helper: For use by the "clear vnc prefixes" command | |
4649 | * | |
d62a17ae | 4650 | * input: |
65efcfce LB |
4651 | * un if set, tunnel must match this prefix |
4652 | * vn if set, nexthop prefix must match this prefix | |
4653 | * p if set, prefix must match this prefix | |
5ff06872 | 4654 | * it if set, only look in this import table |
65efcfce LB |
4655 | * |
4656 | * output | |
4657 | * pARcount number of active routes deleted | |
4658 | * pAHcount number of active nves deleted | |
4659 | * pHRcount number of holddown routes deleted | |
4660 | * pHHcount number of holddown nves deleted | |
4661 | * | |
4662 | * return value: | |
4663 | * void | |
4664 | --------------------------------------------*/ | |
d62a17ae | 4665 | void rfapiDeleteRemotePrefixes(struct prefix *un, struct prefix *vn, |
4666 | struct prefix *p, | |
4667 | struct rfapi_import_table *arg_it, | |
4668 | int delete_active, int delete_holddown, | |
4669 | uint32_t *pARcount, uint32_t *pAHcount, | |
4670 | uint32_t *pHRcount, uint32_t *pHHcount) | |
65efcfce | 4671 | { |
d62a17ae | 4672 | struct bgp *bgp; |
4673 | struct rfapi *h; | |
4674 | struct rfapi_import_table *it; | |
4675 | uint32_t deleted_holddown_route_count = 0; | |
4676 | uint32_t deleted_active_route_count = 0; | |
4677 | uint32_t deleted_holddown_nve_count = 0; | |
4678 | uint32_t deleted_active_nve_count = 0; | |
4679 | struct skiplist *uniq_holddown_nves; | |
4680 | struct skiplist *uniq_active_nves; | |
4681 | ||
4682 | VNC_ITRCCK; | |
4683 | ||
4684 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
4685 | /* If no bgp instantiated yet, no vnc prefixes exist */ | |
4686 | if (!bgp) | |
4687 | return; | |
4688 | ||
4689 | h = bgp->rfapi; | |
4690 | assert(h); | |
4691 | ||
4692 | uniq_holddown_nves = | |
4693 | skiplist_new(0, rfapi_nve_addr_cmp, delete_rem_pfx_na_free); | |
4694 | uniq_active_nves = | |
4695 | skiplist_new(0, rfapi_nve_addr_cmp, delete_rem_pfx_na_free); | |
4696 | ||
4697 | /* | |
4698 | * Iterate over all import tables; do a filtered import | |
4699 | * for the afi/safi combination | |
4700 | */ | |
4701 | ||
4702 | if (arg_it) | |
4703 | it = arg_it; | |
4704 | else | |
4705 | it = h->imports; | |
4706 | for (; it;) { | |
4707 | ||
4708 | vnc_zlog_debug_verbose( | |
4709 | "%s: calling rfapiDeleteRemotePrefixesIt() on (IP) import %p", | |
4710 | __func__, it); | |
4711 | ||
4712 | rfapiDeleteRemotePrefixesIt( | |
4713 | bgp, it, un, vn, p, delete_active, delete_holddown, | |
4714 | &deleted_active_route_count, &deleted_active_nve_count, | |
4715 | &deleted_holddown_route_count, | |
4716 | &deleted_holddown_nve_count, uniq_active_nves, | |
4717 | uniq_holddown_nves); | |
4718 | ||
4719 | if (arg_it) | |
4720 | it = NULL; | |
4721 | else | |
4722 | it = it->next; | |
4723 | } | |
4724 | ||
4725 | /* | |
4726 | * Now iterate over L2 import tables | |
4727 | */ | |
4728 | if (h->import_mac && !(p && (p->family != AF_ETHERNET))) { | |
4729 | ||
4730 | void *cursor = NULL; | |
4731 | int rc; | |
4732 | ||
9d303b37 DL |
4733 | for (cursor = NULL, |
4734 | rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4735 | &cursor); | |
d62a17ae | 4736 | !rc; rc = skiplist_next(h->import_mac, NULL, (void **)&it, |
4737 | &cursor)) { | |
4738 | ||
4739 | vnc_zlog_debug_verbose( | |
4740 | "%s: calling rfapiDeleteRemotePrefixesIt() on import_mac %p", | |
4741 | __func__, it); | |
4742 | ||
4743 | rfapiDeleteRemotePrefixesIt( | |
4744 | bgp, it, un, vn, p, delete_active, | |
4745 | delete_holddown, &deleted_active_route_count, | |
4746 | &deleted_active_nve_count, | |
4747 | &deleted_holddown_route_count, | |
4748 | &deleted_holddown_nve_count, uniq_active_nves, | |
4749 | uniq_holddown_nves); | |
4750 | } | |
4751 | } | |
4752 | ||
4753 | /* | |
4754 | * our custom element freeing function above counts as it deletes | |
4755 | */ | |
4756 | skiplist_free(uniq_holddown_nves); | |
4757 | skiplist_free(uniq_active_nves); | |
4758 | ||
4759 | if (pARcount) | |
4760 | *pARcount = deleted_active_route_count; | |
4761 | if (pAHcount) | |
4762 | *pAHcount = deleted_active_nve_count; | |
4763 | if (pHRcount) | |
4764 | *pHRcount = deleted_holddown_route_count; | |
4765 | if (pHHcount) | |
4766 | *pHHcount = deleted_holddown_nve_count; | |
4767 | ||
4768 | VNC_ITRCCK; | |
65efcfce LB |
4769 | } |
4770 | ||
4771 | /*------------------------------------------ | |
4772 | * rfapiCountRemoteRoutes | |
4773 | * | |
4774 | * UI helper: count VRF routes from BGP side | |
4775 | * | |
d62a17ae | 4776 | * input: |
65efcfce LB |
4777 | * |
4778 | * output | |
4779 | * pALRcount count of active local routes | |
4780 | * pARRcount count of active remote routes | |
4781 | * pHRcount count of holddown routes | |
4782 | * pIRcount count of direct imported routes | |
4783 | * | |
4784 | * return value: | |
4785 | * void | |
4786 | --------------------------------------------*/ | |
d62a17ae | 4787 | void rfapiCountAllItRoutes(int *pALRcount, /* active local routes */ |
4788 | int *pARRcount, /* active remote routes */ | |
4789 | int *pHRcount, /* holddown routes */ | |
4790 | int *pIRcount) /* imported routes */ | |
65efcfce | 4791 | { |
d62a17ae | 4792 | struct bgp *bgp; |
4793 | struct rfapi *h; | |
4794 | struct rfapi_import_table *it; | |
4795 | afi_t afi; | |
4796 | ||
4797 | int total_active_local = 0; | |
4798 | int total_active_remote = 0; | |
4799 | int total_holddown = 0; | |
4800 | int total_imported = 0; | |
4801 | ||
4802 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
4803 | assert(bgp); | |
4804 | ||
4805 | h = bgp->rfapi; | |
4806 | assert(h); | |
4807 | ||
4808 | /* | |
4809 | * Iterate over all import tables; do a filtered import | |
4810 | * for the afi/safi combination | |
4811 | */ | |
4812 | ||
4813 | for (it = h->imports; it; it = it->next) { | |
4814 | ||
4815 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
4816 | ||
4817 | total_active_local += it->local_count[afi]; | |
4818 | total_active_remote += it->remote_count[afi]; | |
4819 | total_holddown += it->holddown_count[afi]; | |
4820 | total_imported += it->imported_count[afi]; | |
4821 | } | |
4822 | } | |
4823 | ||
4824 | void *cursor; | |
4825 | int rc; | |
4826 | ||
4827 | if (h->import_mac) { | |
9d303b37 DL |
4828 | for (cursor = NULL, |
4829 | rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4830 | &cursor); | |
d62a17ae | 4831 | !rc; rc = skiplist_next(h->import_mac, NULL, (void **)&it, |
4832 | &cursor)) { | |
4833 | ||
4834 | total_active_local += it->local_count[AFI_L2VPN]; | |
4835 | total_active_remote += it->remote_count[AFI_L2VPN]; | |
4836 | total_holddown += it->holddown_count[AFI_L2VPN]; | |
4837 | total_imported += it->imported_count[AFI_L2VPN]; | |
4838 | } | |
4839 | } | |
4840 | ||
4841 | ||
4842 | if (pALRcount) { | |
4843 | *pALRcount = total_active_local; | |
4844 | } | |
4845 | if (pARRcount) { | |
4846 | *pARRcount = total_active_remote; | |
4847 | } | |
4848 | if (pHRcount) { | |
4849 | *pHRcount = total_holddown; | |
4850 | } | |
4851 | if (pIRcount) { | |
4852 | *pIRcount = total_imported; | |
4853 | } | |
65efcfce LB |
4854 | } |
4855 | ||
4856 | /*------------------------------------------ | |
4857 | * rfapiGetHolddownFromLifetime | |
4858 | * | |
4859 | * calculate holddown value based on lifetime | |
4860 | * | |
d62a17ae | 4861 | * input: |
65efcfce LB |
4862 | * lifetime lifetime |
4863 | * | |
4864 | * return value: | |
4865 | * Holddown value based on lifetime, holddown_factor, | |
4866 | * and RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY | |
4867 | * | |
4868 | --------------------------------------------*/ | |
4869 | /* hold down time maxes out at RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY */ | |
d62a17ae | 4870 | uint32_t rfapiGetHolddownFromLifetime(uint32_t lifetime) |
65efcfce | 4871 | { |
d62a17ae | 4872 | uint32_t factor; |
4873 | struct bgp *bgp; | |
4874 | ||
4875 | bgp = bgp_get_default(); | |
4876 | if (bgp && bgp->rfapi_cfg) | |
4877 | factor = bgp->rfapi_cfg->rfp_cfg.holddown_factor; | |
4878 | else | |
4879 | factor = RFAPI_RFP_CFG_DEFAULT_HOLDDOWN_FACTOR; | |
4880 | ||
4881 | if (factor < 100 || lifetime < RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY) | |
4882 | lifetime = lifetime * factor / 100; | |
4883 | if (lifetime < RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY) | |
4884 | return lifetime; | |
4885 | else | |
4886 | return RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY; | |
65efcfce | 4887 | } |