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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 | ||
f8b6f499 LB |
26 | #include "lib/zebra.h" |
27 | #include "lib/prefix.h" | |
fe08ba7e | 28 | #include "lib/agg_table.h" |
f8b6f499 LB |
29 | #include "lib/vty.h" |
30 | #include "lib/memory.h" | |
31 | #include "lib/log.h" | |
32 | #include "lib/skiplist.h" | |
33 | #include "lib/thread.h" | |
937652c6 | 34 | #include "lib/stream.h" |
02705213 | 35 | #include "lib/lib_errors.h" |
65efcfce | 36 | |
f8b6f499 LB |
37 | #include "bgpd/bgpd.h" |
38 | #include "bgpd/bgp_ecommunity.h" | |
39 | #include "bgpd/bgp_attr.h" | |
40 | #include "bgpd/bgp_route.h" | |
d62a17ae | 41 | #include "bgpd/bgp_mplsvpn.h" /* prefix_rd2str() */ |
f8b6f499 | 42 | #include "bgpd/bgp_vnc_types.h" |
06b9f471 | 43 | #include "bgpd/bgp_rd.h" |
65efcfce | 44 | |
f8b6f499 LB |
45 | #include "bgpd/rfapi/rfapi.h" |
46 | #include "bgpd/rfapi/bgp_rfapi_cfg.h" | |
47 | #include "bgpd/rfapi/rfapi_backend.h" | |
48 | #include "bgpd/rfapi/rfapi_import.h" | |
49 | #include "bgpd/rfapi/rfapi_private.h" | |
50 | #include "bgpd/rfapi/rfapi_monitor.h" | |
51 | #include "bgpd/rfapi/rfapi_nve_addr.h" | |
52 | #include "bgpd/rfapi/rfapi_vty.h" | |
53 | #include "bgpd/rfapi/vnc_export_bgp.h" | |
54 | #include "bgpd/rfapi/vnc_export_bgp_p.h" | |
55 | #include "bgpd/rfapi/vnc_zebra.h" | |
56 | #include "bgpd/rfapi/vnc_import_bgp.h" | |
57 | #include "bgpd/rfapi/vnc_import_bgp_p.h" | |
58 | #include "bgpd/rfapi/rfapi_rib.h" | |
59 | #include "bgpd/rfapi/rfapi_encap_tlv.h" | |
60 | #include "bgpd/rfapi/vnc_debug.h" | |
65efcfce LB |
61 | |
62 | #ifdef HAVE_GLIBC_BACKTRACE | |
63 | /* for backtrace and friends */ | |
64 | #include <execinfo.h> | |
65 | #endif /* HAVE_GLIBC_BACKTRACE */ | |
66 | ||
67 | #undef DEBUG_MONITOR_MOVE_SHORTER | |
68 | #undef DEBUG_RETURNED_NHL | |
69 | #undef DEBUG_ROUTE_COUNTERS | |
70 | #undef DEBUG_ENCAP_MONITOR | |
71 | #undef DEBUG_L2_EXTRA | |
72 | #undef DEBUG_IT_NODES | |
73 | #undef DEBUG_BI_SEARCH | |
74 | ||
75 | /* | |
76 | * Allocated for each withdraw timer instance; freed when the timer | |
77 | * expires or is canceled | |
78 | */ | |
d62a17ae | 79 | struct rfapi_withdraw { |
80 | struct rfapi_import_table *import_table; | |
fe08ba7e | 81 | struct agg_node *node; |
4b7e6066 | 82 | struct bgp_path_info *info; |
d62a17ae | 83 | safi_t safi; /* used only for bulk operations */ |
84 | /* | |
85 | * For import table node reference count checking (i.e., debugging). | |
86 | * Normally when a timer expires, lockoffset should be 0. However, if | |
87 | * the timer expiration function is called directly (e.g., | |
88 | * rfapiExpireVpnNow), the node could be locked by a preceding | |
fe08ba7e DS |
89 | * agg_route_top() or agg_route_next() in a loop, so we need to pass |
90 | * this value in. | |
d62a17ae | 91 | */ |
92 | int lockoffset; | |
65efcfce LB |
93 | }; |
94 | ||
d62a17ae | 95 | /* |
65efcfce LB |
96 | * DEBUG FUNCTION |
97 | * It's evil and fiendish. It's compiler-dependent. | |
98 | * ? Might need LDFLAGS -rdynamic to produce all function names | |
99 | */ | |
d62a17ae | 100 | void rfapiDebugBacktrace(void) |
65efcfce LB |
101 | { |
102 | #ifdef HAVE_GLIBC_BACKTRACE | |
103 | #define RFAPI_DEBUG_BACKTRACE_NENTRIES 200 | |
d62a17ae | 104 | void *buf[RFAPI_DEBUG_BACKTRACE_NENTRIES]; |
105 | char **syms; | |
106 | size_t i; | |
107 | size_t size; | |
65efcfce | 108 | |
d62a17ae | 109 | size = backtrace(buf, RFAPI_DEBUG_BACKTRACE_NENTRIES); |
110 | syms = backtrace_symbols(buf, size); | |
65efcfce | 111 | |
d62a17ae | 112 | for (i = 0; i < size && i < RFAPI_DEBUG_BACKTRACE_NENTRIES; ++i) { |
113 | vnc_zlog_debug_verbose("backtrace[%2zu]: %s", i, syms[i]); | |
114 | } | |
65efcfce | 115 | |
d62a17ae | 116 | free(syms); |
65efcfce LB |
117 | #else |
118 | #endif | |
119 | } | |
120 | ||
121 | /* | |
122 | * DEBUG FUNCTION | |
123 | * Count remote routes and compare with actively-maintained values. | |
124 | * Abort if they disagree. | |
125 | */ | |
4d762f26 | 126 | void rfapiCheckRouteCount(void) |
65efcfce | 127 | { |
d62a17ae | 128 | struct bgp *bgp = bgp_get_default(); |
129 | struct rfapi *h; | |
130 | struct rfapi_import_table *it; | |
131 | afi_t afi; | |
132 | ||
133 | assert(bgp); | |
134 | ||
135 | h = bgp->rfapi; | |
136 | assert(h); | |
137 | ||
138 | for (it = h->imports; it; it = it->next) { | |
139 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
140 | ||
fe08ba7e DS |
141 | struct agg_table *rt; |
142 | struct agg_node *rn; | |
d62a17ae | 143 | |
144 | int holddown_count = 0; | |
145 | int local_count = 0; | |
146 | int imported_count = 0; | |
147 | int remote_count = 0; | |
148 | ||
149 | rt = it->imported_vpn[afi]; | |
150 | ||
fe08ba7e DS |
151 | for (rn = agg_route_top(rt); rn; |
152 | rn = agg_route_next(rn)) { | |
40381db7 | 153 | struct bgp_path_info *bpi; |
4b7e6066 | 154 | struct bgp_path_info *next; |
d62a17ae | 155 | |
40381db7 DS |
156 | for (bpi = rn->info; bpi; bpi = next) { |
157 | next = bpi->next; | |
d62a17ae | 158 | |
40381db7 | 159 | if (CHECK_FLAG(bpi->flags, |
1defdda8 | 160 | BGP_PATH_REMOVED)) { |
d62a17ae | 161 | ++holddown_count; |
162 | ||
163 | } else { | |
40381db7 | 164 | if (RFAPI_LOCAL_BI(bpi)) { |
d62a17ae | 165 | ++local_count; |
166 | } else { | |
167 | if (RFAPI_DIRECT_IMPORT_BI( | |
40381db7 | 168 | bpi)) { |
d62a17ae | 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 | ||
1e20238a | 203 | #ifdef DEBUG_ROUTE_COUNTERS |
65efcfce LB |
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, | |
fe08ba7e | 213 | * agg_unlock_node will delete the node if it is called when |
65efcfce LB |
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 | */ | |
fe08ba7e | 217 | void rfapiCheckRefcount(struct agg_node *rn, safi_t safi, int lockoffset) |
65efcfce | 218 | { |
40381db7 | 219 | unsigned int count_bpi = 0; |
d62a17ae | 220 | unsigned int count_monitor = 0; |
40381db7 | 221 | struct bgp_path_info *bpi; |
d62a17ae | 222 | struct rfapi_monitor_encap *hme; |
223 | struct rfapi_monitor_vpn *hmv; | |
224 | ||
40381db7 DS |
225 | for (bpi = rn->info; bpi; bpi = bpi->next) |
226 | ++count_bpi; | |
d62a17ae | 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 | ||
c10e14e9 DS |
268 | if (count_bpi + count_monitor + lockoffset |
269 | != agg_node_get_lock_count(rn)) { | |
d62a17ae | 270 | vnc_zlog_debug_verbose( |
40381db7 DS |
271 | "%s: count_bpi=%d, count_monitor=%d, lockoffset=%d, rn->lock=%d", |
272 | __func__, count_bpi, count_monitor, lockoffset, | |
c10e14e9 | 273 | agg_node_get_lock_count(rn)); |
d62a17ae | 274 | assert(0); |
275 | } | |
65efcfce LB |
276 | } |
277 | ||
278 | /* | |
279 | * Perform deferred rfapi_close operations that were queued | |
280 | * during callbacks. | |
281 | */ | |
d62a17ae | 282 | static wq_item_status rfapi_deferred_close_workfunc(struct work_queue *q, |
283 | void *data) | |
65efcfce | 284 | { |
d62a17ae | 285 | struct rfapi_descriptor *rfd = data; |
286 | struct rfapi *h = q->spec.data; | |
287 | ||
288 | assert(!(h->flags & RFAPI_INCALLBACK)); | |
289 | rfapi_close(rfd); | |
290 | vnc_zlog_debug_verbose("%s: completed deferred close on handle %p", | |
291 | __func__, rfd); | |
292 | return WQ_SUCCESS; | |
65efcfce LB |
293 | } |
294 | ||
295 | /* | |
296 | * Extract layer 2 option from Encap TLVS in BGP attrs | |
297 | */ | |
d62a17ae | 298 | int rfapiGetL2o(struct attr *attr, struct rfapi_l2address_option *l2o) |
65efcfce | 299 | { |
d62a17ae | 300 | if (attr) { |
301 | ||
302 | struct bgp_attr_encap_subtlv *pEncap; | |
303 | ||
304 | for (pEncap = attr->vnc_subtlvs; pEncap; | |
305 | pEncap = pEncap->next) { | |
306 | ||
307 | if (pEncap->type == BGP_VNC_SUBTLV_TYPE_RFPOPTION) { | |
308 | if (pEncap->value[0] | |
309 | == RFAPI_VN_OPTION_TYPE_L2ADDR) { | |
310 | ||
311 | if (pEncap->value[1] == 14) { | |
312 | memcpy(l2o->macaddr.octet, | |
313 | pEncap->value + 2, | |
28328ea9 | 314 | ETH_ALEN); |
d62a17ae | 315 | l2o->label = |
316 | ((pEncap->value[10] | |
317 | >> 4) | |
318 | & 0x0f) | |
319 | + ((pEncap->value[9] | |
320 | << 4) | |
321 | & 0xff0) | |
322 | + ((pEncap->value[8] | |
323 | << 12) | |
324 | & 0xff000); | |
325 | ||
326 | l2o->local_nve_id = | |
327 | pEncap->value[12]; | |
328 | ||
329 | l2o->logical_net_id = | |
330 | (pEncap->value[15] | |
331 | & 0xff) | |
332 | + ((pEncap->value[14] | |
333 | << 8) | |
334 | & 0xff00) | |
335 | + ((pEncap->value[13] | |
336 | << 16) | |
337 | & 0xff0000); | |
338 | } | |
339 | ||
340 | return 0; | |
341 | } | |
342 | } | |
343 | } | |
344 | } | |
345 | ||
346 | return ENOENT; | |
65efcfce LB |
347 | } |
348 | ||
349 | /* | |
350 | * Extract the lifetime from the Tunnel Encap attribute of a route in | |
351 | * an import table | |
352 | */ | |
d62a17ae | 353 | int rfapiGetVncLifetime(struct attr *attr, uint32_t *lifetime) |
65efcfce | 354 | { |
d62a17ae | 355 | struct bgp_attr_encap_subtlv *pEncap; |
65efcfce | 356 | |
d62a17ae | 357 | *lifetime = RFAPI_INFINITE_LIFETIME; /* default to infinite */ |
65efcfce | 358 | |
d62a17ae | 359 | if (attr) { |
65efcfce | 360 | |
d62a17ae | 361 | for (pEncap = attr->vnc_subtlvs; pEncap; |
362 | pEncap = pEncap->next) { | |
65efcfce | 363 | |
d62a17ae | 364 | if (pEncap->type |
365 | == BGP_VNC_SUBTLV_TYPE_LIFETIME) { /* lifetime */ | |
366 | if (pEncap->length == 4) { | |
367 | memcpy(lifetime, pEncap->value, 4); | |
368 | *lifetime = ntohl(*lifetime); | |
369 | return 0; | |
370 | } | |
371 | } | |
372 | } | |
373 | } | |
65efcfce | 374 | |
d62a17ae | 375 | return ENOENT; |
65efcfce LB |
376 | } |
377 | ||
65efcfce LB |
378 | /* |
379 | * Look for UN address in Encap attribute | |
380 | */ | |
d62a17ae | 381 | int rfapiGetVncTunnelUnAddr(struct attr *attr, struct prefix *p) |
65efcfce | 382 | { |
d62a17ae | 383 | struct bgp_attr_encap_subtlv *pEncap; |
f4bd90c5 | 384 | bgp_encap_types tun_type = BGP_ENCAP_TYPE_MPLS;/*Default tunnel type*/ |
d62a17ae | 385 | |
f4bd90c5 | 386 | bgp_attr_extcom_tunnel_type(attr, &tun_type); |
d62a17ae | 387 | if (tun_type == BGP_ENCAP_TYPE_MPLS) { |
388 | if (!p) | |
389 | return 0; | |
390 | /* MPLS carries UN address in next hop */ | |
391 | rfapiNexthop2Prefix(attr, p); | |
392 | if (p->family != 0) | |
393 | return 0; | |
394 | ||
395 | return ENOENT; | |
396 | } | |
397 | if (attr) { | |
398 | for (pEncap = attr->encap_subtlvs; pEncap; | |
399 | pEncap = pEncap->next) { | |
400 | ||
401 | if (pEncap->type | |
402 | == BGP_ENCAP_SUBTLV_TYPE_REMOTE_ENDPOINT) { /* un | |
403 | addr | |
404 | */ | |
405 | switch (pEncap->length) { | |
406 | case 8: | |
407 | if (p) { | |
408 | p->family = AF_INET; | |
409 | p->prefixlen = 32; | |
410 | memcpy(p->u.val, pEncap->value, | |
411 | 4); | |
412 | } | |
413 | return 0; | |
414 | ||
415 | case 20: | |
416 | if (p) { | |
417 | p->family = AF_INET6; | |
418 | p->prefixlen = 128; | |
419 | memcpy(p->u.val, pEncap->value, | |
420 | 16); | |
421 | } | |
422 | return 0; | |
423 | } | |
424 | } | |
425 | } | |
426 | } | |
427 | ||
428 | return ENOENT; | |
65efcfce LB |
429 | } |
430 | ||
431 | /* | |
432 | * Get UN address wherever it might be | |
433 | */ | |
40381db7 | 434 | int rfapiGetUnAddrOfVpnBi(struct bgp_path_info *bpi, struct prefix *p) |
65efcfce | 435 | { |
d62a17ae | 436 | /* If it's in this route's VNC attribute, we're done */ |
40381db7 | 437 | if (!rfapiGetVncTunnelUnAddr(bpi->attr, p)) |
d62a17ae | 438 | return 0; |
439 | /* | |
440 | * Otherwise, see if it's cached from a corresponding ENCAP SAFI | |
441 | * advertisement | |
442 | */ | |
40381db7 DS |
443 | if (bpi->extra) { |
444 | switch (bpi->extra->vnc.import.un_family) { | |
d62a17ae | 445 | case AF_INET: |
446 | if (p) { | |
40381db7 DS |
447 | p->family = bpi->extra->vnc.import.un_family; |
448 | p->u.prefix4 = bpi->extra->vnc.import.un.addr4; | |
d62a17ae | 449 | p->prefixlen = 32; |
450 | } | |
451 | return 0; | |
452 | case AF_INET6: | |
453 | if (p) { | |
40381db7 DS |
454 | p->family = bpi->extra->vnc.import.un_family; |
455 | p->u.prefix6 = bpi->extra->vnc.import.un.addr6; | |
d62a17ae | 456 | p->prefixlen = 128; |
457 | } | |
458 | return 0; | |
459 | default: | |
460 | if (p) | |
461 | p->family = 0; | |
1e20238a | 462 | #ifdef DEBUG_ENCAP_MONITOR |
d62a17ae | 463 | vnc_zlog_debug_verbose( |
40381db7 | 464 | "%s: bpi->extra->vnc.import.un_family is 0, no UN addr", |
d62a17ae | 465 | __func__); |
65efcfce | 466 | #endif |
d62a17ae | 467 | break; |
468 | } | |
469 | } | |
65efcfce | 470 | |
d62a17ae | 471 | return ENOENT; |
65efcfce LB |
472 | } |
473 | ||
474 | ||
475 | /* | |
9b6d8fcf | 476 | * Make a new bgp_path_info from gathered parameters |
65efcfce | 477 | */ |
4b7e6066 DS |
478 | static struct bgp_path_info *rfapiBgpInfoCreate(struct attr *attr, |
479 | struct peer *peer, void *rfd, | |
480 | struct prefix_rd *prd, | |
481 | uint8_t type, uint8_t sub_type, | |
482 | uint32_t *label) | |
65efcfce | 483 | { |
4b7e6066 | 484 | struct bgp_path_info *new; |
d62a17ae | 485 | |
9591da26 DS |
486 | new = info_make(type, sub_type, 0, peer, attr, NULL); |
487 | ||
05864da7 | 488 | new->attr = bgp_attr_intern(attr); |
d62a17ae | 489 | |
18ee8310 | 490 | bgp_path_info_extra_get(new); |
d62a17ae | 491 | if (prd) { |
492 | new->extra->vnc.import.rd = *prd; | |
493 | rfapi_time(&new->extra->vnc.import.create_time); | |
494 | } | |
495 | if (label) | |
317f1fe0 | 496 | encode_label(*label, &new->extra->label[0]); |
9591da26 | 497 | |
d62a17ae | 498 | peer_lock(peer); |
499 | ||
500 | return new; | |
65efcfce LB |
501 | } |
502 | ||
503 | /* | |
9b6d8fcf | 504 | * Frees bgp_path_info as used in import tables (parts are not |
65efcfce LB |
505 | * allocated exactly the way they are in the main RIBs) |
506 | */ | |
4b7e6066 | 507 | static void rfapiBgpInfoFree(struct bgp_path_info *goner) |
65efcfce | 508 | { |
d62a17ae | 509 | if (!goner) |
510 | return; | |
511 | ||
512 | if (goner->peer) { | |
513 | vnc_zlog_debug_verbose("%s: calling peer_unlock(%p), #%d", | |
514 | __func__, goner->peer, | |
515 | goner->peer->lock); | |
516 | peer_unlock(goner->peer); | |
517 | } | |
518 | ||
05864da7 DS |
519 | bgp_attr_unintern(&goner->attr); |
520 | ||
a2e219fe PG |
521 | if (goner->extra) |
522 | bgp_path_info_extra_free(&goner->extra); | |
d62a17ae | 523 | XFREE(MTYPE_BGP_ROUTE, goner); |
65efcfce LB |
524 | } |
525 | ||
d62a17ae | 526 | struct rfapi_import_table *rfapiMacImportTableGetNoAlloc(struct bgp *bgp, |
527 | uint32_t lni) | |
65efcfce | 528 | { |
d62a17ae | 529 | struct rfapi *h; |
530 | struct rfapi_import_table *it = NULL; | |
531 | uintptr_t lni_as_ptr = lni; | |
65efcfce | 532 | |
d62a17ae | 533 | h = bgp->rfapi; |
534 | if (!h) | |
535 | return NULL; | |
65efcfce | 536 | |
d62a17ae | 537 | if (!h->import_mac) |
538 | return NULL; | |
65efcfce | 539 | |
d62a17ae | 540 | if (skiplist_search(h->import_mac, (void *)lni_as_ptr, (void **)&it)) |
541 | return NULL; | |
65efcfce | 542 | |
d62a17ae | 543 | return it; |
65efcfce LB |
544 | } |
545 | ||
d62a17ae | 546 | struct rfapi_import_table *rfapiMacImportTableGet(struct bgp *bgp, uint32_t lni) |
65efcfce | 547 | { |
d62a17ae | 548 | struct rfapi *h; |
549 | struct rfapi_import_table *it = NULL; | |
550 | uintptr_t lni_as_ptr = lni; | |
551 | ||
552 | h = bgp->rfapi; | |
553 | assert(h); | |
554 | ||
555 | if (!h->import_mac) { | |
556 | /* default cmp is good enough for LNI */ | |
557 | h->import_mac = skiplist_new(0, NULL, NULL); | |
558 | } | |
559 | ||
560 | if (skiplist_search(h->import_mac, (void *)lni_as_ptr, (void **)&it)) { | |
561 | ||
562 | struct ecommunity *enew; | |
563 | struct ecommunity_val eval; | |
564 | afi_t afi; | |
565 | ||
566 | it = XCALLOC(MTYPE_RFAPI_IMPORTTABLE, | |
567 | sizeof(struct rfapi_import_table)); | |
568 | /* set RT list of new import table based on LNI */ | |
569 | memset((char *)&eval, 0, sizeof(eval)); | |
570 | eval.val[0] = 0; /* VNC L2VPN */ | |
571 | eval.val[1] = 2; /* VNC L2VPN */ | |
572 | eval.val[5] = (lni >> 16) & 0xff; | |
573 | eval.val[6] = (lni >> 8) & 0xff; | |
574 | eval.val[7] = (lni >> 0) & 0xff; | |
575 | ||
576 | enew = ecommunity_new(); | |
1207a5bc | 577 | ecommunity_add_val(enew, &eval, false, false); |
d62a17ae | 578 | it->rt_import_list = enew; |
579 | ||
580 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
fe08ba7e DS |
581 | it->imported_vpn[afi] = agg_table_init(); |
582 | it->imported_encap[afi] = agg_table_init(); | |
d62a17ae | 583 | } |
584 | ||
585 | it->l2_logical_net_id = lni; | |
586 | ||
587 | skiplist_insert(h->import_mac, (void *)lni_as_ptr, it); | |
588 | } | |
589 | ||
590 | assert(it); | |
591 | return it; | |
65efcfce LB |
592 | } |
593 | ||
594 | /* | |
595 | * Implement MONITOR_MOVE_SHORTER(original_node) from | |
596 | * RFAPI-Import-Event-Handling.txt | |
d62a17ae | 597 | * |
65efcfce LB |
598 | * Returns pointer to the list of moved monitors |
599 | */ | |
600 | static struct rfapi_monitor_vpn * | |
fe08ba7e | 601 | rfapiMonitorMoveShorter(struct agg_node *original_vpn_node, int lockoffset) |
65efcfce | 602 | { |
40381db7 | 603 | struct bgp_path_info *bpi; |
fe08ba7e | 604 | struct agg_node *par; |
d62a17ae | 605 | struct rfapi_monitor_vpn *m; |
606 | struct rfapi_monitor_vpn *mlast; | |
607 | struct rfapi_monitor_vpn *moved; | |
608 | int movecount = 0; | |
609 | int parent_already_refcounted = 0; | |
65efcfce | 610 | |
d62a17ae | 611 | RFAPI_CHECK_REFCOUNT(original_vpn_node, SAFI_MPLS_VPN, lockoffset); |
65efcfce | 612 | |
1e20238a | 613 | #ifdef DEBUG_MONITOR_MOVE_SHORTER |
d62a17ae | 614 | { |
2dbe669b DA |
615 | vnc_zlog_debug_verbose("%s: called with node pfx=%pFX", |
616 | __func__, &original_vpn_node->p); | |
d62a17ae | 617 | } |
65efcfce LB |
618 | #endif |
619 | ||
d62a17ae | 620 | /* |
40381db7 | 621 | * 1. If there is at least one bpi (either regular route or |
d62a17ae | 622 | * route marked as withdrawn, with a pending timer) at |
623 | * original_node with a valid UN address, we're done. Return. | |
624 | */ | |
40381db7 | 625 | for (bpi = original_vpn_node->info; bpi; bpi = bpi->next) { |
d62a17ae | 626 | struct prefix pfx; |
627 | ||
40381db7 | 628 | if (!rfapiGetUnAddrOfVpnBi(bpi, &pfx)) { |
1e20238a | 629 | #ifdef DEBUG_MONITOR_MOVE_SHORTER |
d62a17ae | 630 | vnc_zlog_debug_verbose( |
631 | "%s: have valid UN at original node, no change", | |
632 | __func__); | |
65efcfce | 633 | #endif |
d62a17ae | 634 | return NULL; |
635 | } | |
636 | } | |
637 | ||
638 | /* | |
639 | * 2. Travel up the tree (toward less-specific prefixes) from | |
640 | * original_node to find the first node that has at least | |
641 | * one route (even if it is only a withdrawn route) with a | |
642 | * valid UN address. Call this node "Node P." | |
643 | */ | |
fe08ba7e DS |
644 | for (par = agg_node_parent(original_vpn_node); par; |
645 | par = agg_node_parent(par)) { | |
40381db7 | 646 | for (bpi = par->info; bpi; bpi = bpi->next) { |
d62a17ae | 647 | struct prefix pfx; |
40381db7 | 648 | if (!rfapiGetUnAddrOfVpnBi(bpi, &pfx)) { |
d62a17ae | 649 | break; |
650 | } | |
651 | } | |
40381db7 | 652 | if (bpi) |
d62a17ae | 653 | break; |
654 | } | |
655 | ||
656 | if (par) { | |
657 | RFAPI_CHECK_REFCOUNT(par, SAFI_MPLS_VPN, 0); | |
658 | } | |
659 | ||
660 | /* | |
661 | * If no less-specific routes, try to use the 0/0 node | |
662 | */ | |
663 | if (!par) { | |
26a3ffd6 | 664 | const struct prefix *p; |
d62a17ae | 665 | /* this isn't necessarily 0/0 */ |
fe08ba7e | 666 | par = agg_route_table_top(original_vpn_node); |
d62a17ae | 667 | |
26a3ffd6 DS |
668 | if (par) |
669 | p = agg_node_get_prefix(par); | |
d62a17ae | 670 | /* |
671 | * If we got the top node but it wasn't 0/0, | |
672 | * ignore it | |
673 | */ | |
26a3ffd6 | 674 | if (par && p->prefixlen) { |
fe08ba7e | 675 | agg_unlock_node(par); /* maybe free */ |
d62a17ae | 676 | par = NULL; |
677 | } | |
678 | ||
679 | if (par) { | |
680 | ++parent_already_refcounted; | |
681 | } | |
682 | } | |
683 | ||
684 | /* | |
685 | * Create 0/0 node if it isn't there | |
686 | */ | |
687 | if (!par) { | |
688 | struct prefix pfx_default; | |
26a3ffd6 | 689 | const struct prefix *p = agg_node_get_prefix(original_vpn_node); |
d62a17ae | 690 | |
691 | memset(&pfx_default, 0, sizeof(pfx_default)); | |
26a3ffd6 | 692 | pfx_default.family = p->family; |
d62a17ae | 693 | |
694 | /* creates default node if none exists */ | |
fe08ba7e DS |
695 | par = agg_node_get(agg_get_table(original_vpn_node), |
696 | &pfx_default); | |
d62a17ae | 697 | ++parent_already_refcounted; |
698 | } | |
699 | ||
700 | /* | |
701 | * 3. Move each of the monitors found at original_node to Node P. | |
702 | * These are "Moved Monitors." | |
703 | * | |
704 | */ | |
705 | ||
706 | /* | |
707 | * Attach at end so that the list pointer we return points | |
708 | * only to the moved routes | |
709 | */ | |
710 | for (m = RFAPI_MONITOR_VPN(par), mlast = NULL; m; | |
711 | mlast = m, m = m->next) | |
712 | ; | |
713 | ||
714 | if (mlast) { | |
715 | moved = mlast->next = RFAPI_MONITOR_VPN(original_vpn_node); | |
716 | } else { | |
717 | moved = RFAPI_MONITOR_VPN_W_ALLOC(par) = | |
718 | RFAPI_MONITOR_VPN(original_vpn_node); | |
719 | } | |
720 | if (RFAPI_MONITOR_VPN( | |
721 | original_vpn_node)) /* check agg, so not allocated */ | |
722 | RFAPI_MONITOR_VPN_W_ALLOC(original_vpn_node) = NULL; | |
723 | ||
724 | /* | |
725 | * update the node pointers on the monitors | |
726 | */ | |
727 | for (m = moved; m; m = m->next) { | |
728 | ++movecount; | |
729 | m->node = par; | |
730 | } | |
731 | ||
732 | RFAPI_CHECK_REFCOUNT(par, SAFI_MPLS_VPN, | |
733 | parent_already_refcounted - movecount); | |
734 | while (movecount > parent_already_refcounted) { | |
fe08ba7e | 735 | agg_lock_node(par); |
d62a17ae | 736 | ++parent_already_refcounted; |
737 | } | |
738 | while (movecount < parent_already_refcounted) { | |
739 | /* unlikely, but code defensively */ | |
fe08ba7e | 740 | agg_unlock_node(par); |
d62a17ae | 741 | --parent_already_refcounted; |
742 | } | |
743 | RFAPI_CHECK_REFCOUNT(original_vpn_node, SAFI_MPLS_VPN, | |
744 | movecount + lockoffset); | |
745 | while (movecount--) { | |
fe08ba7e | 746 | agg_unlock_node(original_vpn_node); |
d62a17ae | 747 | } |
65efcfce | 748 | |
1e20238a | 749 | #ifdef DEBUG_MONITOR_MOVE_SHORTER |
d62a17ae | 750 | { |
2dbe669b DA |
751 | vnc_zlog_debug_verbose("%s: moved to node pfx=%pFX", __func__, |
752 | &par->p); | |
d62a17ae | 753 | } |
65efcfce LB |
754 | #endif |
755 | ||
756 | ||
d62a17ae | 757 | return moved; |
65efcfce LB |
758 | } |
759 | ||
760 | /* | |
761 | * Implement MONITOR_MOVE_LONGER(new_node) from | |
762 | * RFAPI-Import-Event-Handling.txt | |
763 | */ | |
fe08ba7e | 764 | static void rfapiMonitorMoveLonger(struct agg_node *new_vpn_node) |
65efcfce | 765 | { |
d62a17ae | 766 | struct rfapi_monitor_vpn *monitor; |
767 | struct rfapi_monitor_vpn *mlast; | |
40381db7 | 768 | struct bgp_path_info *bpi; |
fe08ba7e | 769 | struct agg_node *par; |
26a3ffd6 | 770 | const struct prefix *new_vpn_node_p = agg_node_get_prefix(new_vpn_node); |
d62a17ae | 771 | |
772 | RFAPI_CHECK_REFCOUNT(new_vpn_node, SAFI_MPLS_VPN, 0); | |
773 | ||
774 | /* | |
775 | * Make sure we have at least one valid route at the new node | |
776 | */ | |
40381db7 | 777 | for (bpi = new_vpn_node->info; bpi; bpi = bpi->next) { |
d62a17ae | 778 | struct prefix pfx; |
40381db7 | 779 | if (!rfapiGetUnAddrOfVpnBi(bpi, &pfx)) |
d62a17ae | 780 | break; |
781 | } | |
782 | ||
40381db7 | 783 | if (!bpi) { |
d62a17ae | 784 | vnc_zlog_debug_verbose( |
785 | "%s: no valid routes at node %p, so not attempting moves", | |
786 | __func__, new_vpn_node); | |
787 | return; | |
788 | } | |
789 | ||
790 | /* | |
791 | * Find first parent node that has monitors | |
792 | */ | |
fe08ba7e DS |
793 | for (par = agg_node_parent(new_vpn_node); par; |
794 | par = agg_node_parent(par)) { | |
d62a17ae | 795 | if (RFAPI_MONITOR_VPN(par)) |
796 | break; | |
797 | } | |
798 | ||
799 | if (!par) { | |
800 | vnc_zlog_debug_verbose( | |
801 | "%s: no parent nodes with monitors, done", __func__); | |
802 | return; | |
803 | } | |
804 | ||
805 | /* | |
806 | * Check each of these monitors to see of their longest-match | |
807 | * is now the updated node. Move any such monitors to the more- | |
808 | * specific updated node | |
809 | */ | |
810 | for (mlast = NULL, monitor = RFAPI_MONITOR_VPN(par); monitor;) { | |
d62a17ae | 811 | /* |
812 | * If new longest match for monitor prefix is the new | |
813 | * route's prefix, move monitor to new route's prefix | |
814 | */ | |
26a3ffd6 | 815 | if (prefix_match(new_vpn_node_p, &monitor->p)) { |
d62a17ae | 816 | /* detach */ |
817 | if (mlast) { | |
818 | mlast->next = monitor->next; | |
819 | } else { | |
820 | RFAPI_MONITOR_VPN_W_ALLOC(par) = monitor->next; | |
821 | } | |
822 | ||
823 | ||
824 | /* attach */ | |
825 | monitor->next = RFAPI_MONITOR_VPN(new_vpn_node); | |
826 | RFAPI_MONITOR_VPN_W_ALLOC(new_vpn_node) = monitor; | |
827 | monitor->node = new_vpn_node; | |
828 | ||
fe08ba7e | 829 | agg_lock_node(new_vpn_node); /* incr refcount */ |
d62a17ae | 830 | |
831 | monitor = mlast ? mlast->next : RFAPI_MONITOR_VPN(par); | |
832 | ||
833 | RFAPI_CHECK_REFCOUNT(par, SAFI_MPLS_VPN, 1); | |
834 | /* decr refcount after we're done with par as this might | |
835 | * free it */ | |
fe08ba7e | 836 | agg_unlock_node(par); |
d62a17ae | 837 | |
838 | continue; | |
839 | } | |
840 | mlast = monitor; | |
841 | monitor = monitor->next; | |
842 | } | |
843 | ||
844 | RFAPI_CHECK_REFCOUNT(new_vpn_node, SAFI_MPLS_VPN, 0); | |
65efcfce LB |
845 | } |
846 | ||
847 | ||
40381db7 | 848 | static void rfapiBgpInfoChainFree(struct bgp_path_info *bpi) |
65efcfce | 849 | { |
4b7e6066 | 850 | struct bgp_path_info *next; |
d62a17ae | 851 | |
40381db7 | 852 | while (bpi) { |
d62a17ae | 853 | |
854 | /* | |
40381db7 | 855 | * If there is a timer waiting to delete this bpi, cancel |
d62a17ae | 856 | * the timer and delete immediately |
857 | */ | |
40381db7 DS |
858 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
859 | && bpi->extra->vnc.import.timer) { | |
d62a17ae | 860 | |
b3d6bc6e MS |
861 | struct thread **t = |
862 | &(bpi->extra->vnc.import.timer); | |
863 | struct rfapi_withdraw *wcb = (*t)->arg; | |
d62a17ae | 864 | |
865 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
866 | thread_cancel(t); | |
867 | } | |
868 | ||
40381db7 DS |
869 | next = bpi->next; |
870 | bpi->next = NULL; | |
871 | rfapiBgpInfoFree(bpi); | |
872 | bpi = next; | |
d62a17ae | 873 | } |
65efcfce LB |
874 | } |
875 | ||
d62a17ae | 876 | static void rfapiImportTableFlush(struct rfapi_import_table *it) |
65efcfce | 877 | { |
d62a17ae | 878 | afi_t afi; |
879 | ||
880 | /* | |
881 | * Free ecommunity | |
882 | */ | |
883 | ecommunity_free(&it->rt_import_list); | |
884 | it->rt_import_list = NULL; | |
885 | ||
886 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
887 | ||
fe08ba7e | 888 | struct agg_node *rn; |
d62a17ae | 889 | |
fe08ba7e DS |
890 | for (rn = agg_route_top(it->imported_vpn[afi]); rn; |
891 | rn = agg_route_next(rn)) { | |
d62a17ae | 892 | /* |
893 | * Each route_node has: | |
894 | * aggregate: points to rfapi_it_extra with monitor | |
895 | * chain(s) | |
9b6d8fcf | 896 | * info: points to chain of bgp_path_info |
d62a17ae | 897 | */ |
9b6d8fcf | 898 | /* free bgp_path_info and its children */ |
d62a17ae | 899 | rfapiBgpInfoChainFree(rn->info); |
900 | rn->info = NULL; | |
901 | ||
902 | rfapiMonitorExtraFlush(SAFI_MPLS_VPN, rn); | |
903 | } | |
904 | ||
fe08ba7e DS |
905 | for (rn = agg_route_top(it->imported_encap[afi]); rn; |
906 | rn = agg_route_next(rn)) { | |
9b6d8fcf | 907 | /* free bgp_path_info and its children */ |
d62a17ae | 908 | rfapiBgpInfoChainFree(rn->info); |
909 | rn->info = NULL; | |
910 | ||
911 | rfapiMonitorExtraFlush(SAFI_ENCAP, rn); | |
912 | } | |
913 | ||
fe08ba7e DS |
914 | agg_table_finish(it->imported_vpn[afi]); |
915 | agg_table_finish(it->imported_encap[afi]); | |
d62a17ae | 916 | } |
917 | if (it->monitor_exterior_orphans) { | |
918 | skiplist_free(it->monitor_exterior_orphans); | |
919 | } | |
65efcfce LB |
920 | } |
921 | ||
d62a17ae | 922 | void rfapiImportTableRefDelByIt(struct bgp *bgp, |
923 | struct rfapi_import_table *it_target) | |
65efcfce | 924 | { |
d62a17ae | 925 | struct rfapi *h; |
926 | struct rfapi_import_table *it; | |
927 | struct rfapi_import_table *prev = NULL; | |
928 | ||
929 | assert(it_target); | |
930 | ||
931 | h = bgp->rfapi; | |
932 | assert(h); | |
933 | ||
934 | for (it = h->imports; it; prev = it, it = it->next) { | |
935 | if (it == it_target) | |
936 | break; | |
937 | } | |
938 | ||
939 | assert(it); | |
940 | assert(it->refcount); | |
941 | ||
942 | it->refcount -= 1; | |
943 | ||
944 | if (!it->refcount) { | |
945 | if (prev) { | |
946 | prev->next = it->next; | |
947 | } else { | |
948 | h->imports = it->next; | |
949 | } | |
950 | rfapiImportTableFlush(it); | |
951 | XFREE(MTYPE_RFAPI_IMPORTTABLE, it); | |
952 | } | |
65efcfce LB |
953 | } |
954 | ||
1e20238a | 955 | #ifdef RFAPI_REQUIRE_ENCAP_BEEC |
65efcfce LB |
956 | /* |
957 | * Look for magic BGP Encapsulation Extended Community value | |
958 | * Format in RFC 5512 Sect. 4.5 | |
959 | */ | |
d62a17ae | 960 | static int rfapiEcommunitiesMatchBeec(struct ecommunity *ecom, |
961 | bgp_encap_types type) | |
65efcfce | 962 | { |
d62a17ae | 963 | int i; |
65efcfce | 964 | |
d62a17ae | 965 | if (!ecom) |
966 | return 0; | |
65efcfce | 967 | |
d62a17ae | 968 | for (i = 0; i < (ecom->size * ECOMMUNITY_SIZE); i += ECOMMUNITY_SIZE) { |
65efcfce | 969 | |
d62a17ae | 970 | uint8_t *ep; |
65efcfce | 971 | |
d62a17ae | 972 | ep = ecom->val + i; |
65efcfce | 973 | |
d62a17ae | 974 | if (ep[0] == ECOMMUNITY_ENCODE_OPAQUE |
975 | && ep[1] == ECOMMUNITY_OPAQUE_SUBTYPE_ENCAP | |
976 | && ep[6] == ((type && 0xff00) >> 8) | |
977 | && ep[7] == (type & 0xff)) { | |
65efcfce | 978 | |
d62a17ae | 979 | return 1; |
980 | } | |
981 | } | |
982 | return 0; | |
65efcfce LB |
983 | } |
984 | #endif | |
985 | ||
d62a17ae | 986 | int rfapiEcommunitiesIntersect(struct ecommunity *e1, struct ecommunity *e2) |
65efcfce | 987 | { |
d62a17ae | 988 | int i, j; |
989 | ||
990 | if (!e1 || !e2) | |
991 | return 0; | |
992 | ||
993 | { | |
994 | char *s1, *s2; | |
995 | s1 = ecommunity_ecom2str(e1, ECOMMUNITY_FORMAT_DISPLAY, 0); | |
996 | s2 = ecommunity_ecom2str(e2, ECOMMUNITY_FORMAT_DISPLAY, 0); | |
997 | vnc_zlog_debug_verbose("%s: e1[%s], e2[%s]", __func__, s1, s2); | |
998 | XFREE(MTYPE_ECOMMUNITY_STR, s1); | |
999 | XFREE(MTYPE_ECOMMUNITY_STR, s2); | |
1000 | } | |
1001 | ||
1002 | for (i = 0; i < e1->size; ++i) { | |
1003 | for (j = 0; j < e2->size; ++j) { | |
1004 | if (!memcmp(e1->val + (i * ECOMMUNITY_SIZE), | |
1005 | e2->val + (j * ECOMMUNITY_SIZE), | |
1006 | ECOMMUNITY_SIZE)) { | |
1007 | ||
1008 | return 1; | |
1009 | } | |
1010 | } | |
1011 | } | |
1012 | return 0; | |
65efcfce LB |
1013 | } |
1014 | ||
d62a17ae | 1015 | int rfapiEcommunityGetLNI(struct ecommunity *ecom, uint32_t *lni) |
65efcfce | 1016 | { |
d62a17ae | 1017 | if (ecom) { |
1018 | int i; | |
1019 | for (i = 0; i < ecom->size; ++i) { | |
1020 | uint8_t *p = ecom->val + (i * ECOMMUNITY_SIZE); | |
1021 | ||
1022 | if ((*(p + 0) == 0x00) && (*(p + 1) == 0x02)) { | |
1023 | ||
1024 | *lni = (*(p + 5) << 16) | (*(p + 6) << 8) | |
1025 | | (*(p + 7)); | |
1026 | return 0; | |
1027 | } | |
1028 | } | |
1029 | } | |
1030 | return ENOENT; | |
65efcfce LB |
1031 | } |
1032 | ||
d62a17ae | 1033 | int rfapiEcommunityGetEthernetTag(struct ecommunity *ecom, uint16_t *tag_id) |
79799987 | 1034 | { |
d62a17ae | 1035 | struct bgp *bgp = bgp_get_default(); |
1036 | *tag_id = 0; /* default to untagged */ | |
1037 | if (ecom) { | |
1038 | int i; | |
1039 | for (i = 0; i < ecom->size; ++i) { | |
1040 | as_t as = 0; | |
1041 | int encode = 0; | |
1be1693e | 1042 | const uint8_t *p = ecom->val + (i * ECOMMUNITY_SIZE); |
d62a17ae | 1043 | |
1044 | /* High-order octet of type. */ | |
1045 | encode = *p++; | |
1046 | ||
1047 | if (*p++ == ECOMMUNITY_ROUTE_TARGET) { | |
1048 | if (encode == ECOMMUNITY_ENCODE_AS4) { | |
937652c6 | 1049 | p = ptr_get_be32(p, &as); |
d62a17ae | 1050 | } else if (encode == ECOMMUNITY_ENCODE_AS) { |
1051 | as = (*p++ << 8); | |
1052 | as |= (*p++); | |
996c9314 LB |
1053 | p += 2; /* skip next two, tag/vid |
1054 | always in lowest bytes */ | |
d62a17ae | 1055 | } |
1056 | if (as == bgp->as) { | |
1057 | *tag_id = *p++ << 8; | |
1058 | *tag_id |= (*p++); | |
1059 | return 0; | |
1060 | } | |
1061 | } | |
1062 | } | |
1063 | } | |
1064 | return ENOENT; | |
79799987 LB |
1065 | } |
1066 | ||
40381db7 | 1067 | static int rfapiVpnBiNhEqualsPt(struct bgp_path_info *bpi, |
4b7e6066 | 1068 | struct rfapi_ip_addr *hpt) |
65efcfce | 1069 | { |
d62a17ae | 1070 | uint8_t family; |
65efcfce | 1071 | |
40381db7 | 1072 | if (!hpt || !bpi) |
d62a17ae | 1073 | return 0; |
65efcfce | 1074 | |
40381db7 | 1075 | family = BGP_MP_NEXTHOP_FAMILY(bpi->attr->mp_nexthop_len); |
65efcfce | 1076 | |
d62a17ae | 1077 | if (hpt->addr_family != family) |
1078 | return 0; | |
65efcfce | 1079 | |
d62a17ae | 1080 | switch (family) { |
1081 | case AF_INET: | |
40381db7 | 1082 | if (bpi->attr->mp_nexthop_global_in.s_addr |
d62a17ae | 1083 | != hpt->addr.v4.s_addr) |
1084 | return 0; | |
1085 | break; | |
65efcfce | 1086 | |
d62a17ae | 1087 | case AF_INET6: |
40381db7 | 1088 | if (IPV6_ADDR_CMP(&bpi->attr->mp_nexthop_global, &hpt->addr.v6)) |
d62a17ae | 1089 | return 0; |
1090 | break; | |
65efcfce | 1091 | |
d62a17ae | 1092 | default: |
1093 | return 0; | |
d62a17ae | 1094 | } |
65efcfce | 1095 | |
d62a17ae | 1096 | return 1; |
65efcfce LB |
1097 | } |
1098 | ||
1099 | ||
1100 | /* | |
1101 | * Compare 2 VPN BIs. Return true if they have the same VN and UN addresses | |
1102 | */ | |
40381db7 DS |
1103 | static int rfapiVpnBiSamePtUn(struct bgp_path_info *bpi1, |
1104 | struct bgp_path_info *bpi2) | |
65efcfce | 1105 | { |
d62a17ae | 1106 | struct prefix pfx_un1; |
1107 | struct prefix pfx_un2; | |
1108 | ||
40381db7 | 1109 | if (!bpi1 || !bpi2) |
d62a17ae | 1110 | return 0; |
1111 | ||
d62a17ae | 1112 | /* |
1113 | * VN address comparisons | |
1114 | */ | |
1115 | ||
40381db7 DS |
1116 | if (BGP_MP_NEXTHOP_FAMILY(bpi1->attr->mp_nexthop_len) |
1117 | != BGP_MP_NEXTHOP_FAMILY(bpi2->attr->mp_nexthop_len)) { | |
d62a17ae | 1118 | return 0; |
1119 | } | |
1120 | ||
40381db7 | 1121 | switch (BGP_MP_NEXTHOP_FAMILY(bpi1->attr->mp_nexthop_len)) { |
d62a17ae | 1122 | case AF_INET: |
40381db7 DS |
1123 | if (bpi1->attr->mp_nexthop_global_in.s_addr |
1124 | != bpi2->attr->mp_nexthop_global_in.s_addr) | |
d62a17ae | 1125 | return 0; |
1126 | break; | |
1127 | ||
1128 | case AF_INET6: | |
40381db7 DS |
1129 | if (IPV6_ADDR_CMP(&bpi1->attr->mp_nexthop_global, |
1130 | &bpi2->attr->mp_nexthop_global)) | |
d62a17ae | 1131 | return 0; |
1132 | break; | |
1133 | ||
1134 | default: | |
1135 | return 0; | |
d62a17ae | 1136 | } |
1137 | ||
fa3bf3a2 MS |
1138 | memset(&pfx_un1, 0, sizeof(pfx_un1)); |
1139 | memset(&pfx_un2, 0, sizeof(pfx_un2)); | |
1140 | ||
d62a17ae | 1141 | /* |
1142 | * UN address comparisons | |
1143 | */ | |
40381db7 DS |
1144 | if (rfapiGetVncTunnelUnAddr(bpi1->attr, &pfx_un1)) { |
1145 | if (bpi1->extra) { | |
1146 | pfx_un1.family = bpi1->extra->vnc.import.un_family; | |
1147 | switch (bpi1->extra->vnc.import.un_family) { | |
d62a17ae | 1148 | case AF_INET: |
1149 | pfx_un1.u.prefix4 = | |
40381db7 | 1150 | bpi1->extra->vnc.import.un.addr4; |
d62a17ae | 1151 | break; |
1152 | case AF_INET6: | |
1153 | pfx_un1.u.prefix6 = | |
40381db7 | 1154 | bpi1->extra->vnc.import.un.addr6; |
d62a17ae | 1155 | break; |
1156 | default: | |
1157 | pfx_un1.family = 0; | |
1158 | break; | |
1159 | } | |
1160 | } | |
1161 | } | |
1162 | ||
40381db7 DS |
1163 | if (rfapiGetVncTunnelUnAddr(bpi2->attr, &pfx_un2)) { |
1164 | if (bpi2->extra) { | |
1165 | pfx_un2.family = bpi2->extra->vnc.import.un_family; | |
1166 | switch (bpi2->extra->vnc.import.un_family) { | |
d62a17ae | 1167 | case AF_INET: |
1168 | pfx_un2.u.prefix4 = | |
40381db7 | 1169 | bpi2->extra->vnc.import.un.addr4; |
d62a17ae | 1170 | break; |
1171 | case AF_INET6: | |
1172 | pfx_un2.u.prefix6 = | |
40381db7 | 1173 | bpi2->extra->vnc.import.un.addr6; |
d62a17ae | 1174 | break; |
1175 | default: | |
1176 | pfx_un2.family = 0; | |
1177 | break; | |
1178 | } | |
1179 | } | |
1180 | } | |
1181 | ||
fa3bf3a2 | 1182 | if (pfx_un1.family == 0 || pfx_un2.family == 0) |
d62a17ae | 1183 | return 0; |
1184 | ||
1185 | if (pfx_un1.family != pfx_un2.family) | |
1186 | return 0; | |
1187 | ||
1188 | switch (pfx_un1.family) { | |
1189 | case AF_INET: | |
996c9314 | 1190 | if (!IPV4_ADDR_SAME(&pfx_un1.u.prefix4, &pfx_un2.u.prefix4)) |
d62a17ae | 1191 | return 0; |
1192 | break; | |
1193 | case AF_INET6: | |
1194 | if (!IPV6_ADDR_SAME(&pfx_un1.u.prefix6, &pfx_un2.u.prefix6)) | |
1195 | return 0; | |
1196 | break; | |
1197 | } | |
1198 | ||
1199 | ||
1200 | return 1; | |
65efcfce LB |
1201 | } |
1202 | ||
d62a17ae | 1203 | uint8_t rfapiRfpCost(struct attr *attr) |
65efcfce | 1204 | { |
d62a17ae | 1205 | if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF)) { |
1206 | if (attr->local_pref > 255) { | |
1207 | return 0; | |
1208 | } | |
1209 | return 255 - attr->local_pref; | |
1210 | } | |
1211 | ||
1212 | return 255; | |
65efcfce LB |
1213 | } |
1214 | ||
1215 | /*------------------------------------------ | |
1216 | * rfapi_extract_l2o | |
1217 | * | |
d62a17ae | 1218 | * Find Layer 2 options in an option chain |
65efcfce | 1219 | * |
d62a17ae | 1220 | * input: |
65efcfce LB |
1221 | * pHop option chain |
1222 | * | |
1223 | * output: | |
1224 | * l2o layer 2 options extracted | |
1225 | * | |
1226 | * return value: | |
1227 | * 0 OK | |
1228 | * 1 no options found | |
1229 | * | |
1230 | --------------------------------------------*/ | |
d62a17ae | 1231 | int rfapi_extract_l2o( |
1232 | struct bgp_tea_options *pHop, /* chain of options */ | |
1233 | struct rfapi_l2address_option *l2o) /* return extracted value */ | |
65efcfce | 1234 | { |
d62a17ae | 1235 | struct bgp_tea_options *p; |
65efcfce | 1236 | |
d62a17ae | 1237 | for (p = pHop; p; p = p->next) { |
1238 | if ((p->type == RFAPI_VN_OPTION_TYPE_L2ADDR) | |
1239 | && (p->length >= 8)) { | |
65efcfce | 1240 | |
d62a17ae | 1241 | char *v = p->value; |
65efcfce | 1242 | |
d62a17ae | 1243 | memcpy(&l2o->macaddr, v, 6); |
65efcfce | 1244 | |
d62a17ae | 1245 | l2o->label = ((v[6] << 12) & 0xff000) |
1246 | + ((v[7] << 4) & 0xff0) | |
1247 | + ((v[8] >> 4) & 0xf); | |
65efcfce | 1248 | |
d62a17ae | 1249 | l2o->local_nve_id = (uint8_t)v[10]; |
65efcfce | 1250 | |
d62a17ae | 1251 | l2o->logical_net_id = |
1252 | (v[11] << 16) + (v[12] << 8) + (v[13] << 0); | |
65efcfce | 1253 | |
d62a17ae | 1254 | return 0; |
1255 | } | |
1256 | } | |
1257 | return 1; | |
65efcfce LB |
1258 | } |
1259 | ||
1260 | static struct rfapi_next_hop_entry * | |
d62a17ae | 1261 | rfapiRouteInfo2NextHopEntry(struct rfapi_ip_prefix *rprefix, |
40381db7 DS |
1262 | struct bgp_path_info *bpi, /* route to encode */ |
1263 | uint32_t lifetime, /* use this in nhe */ | |
1264 | struct agg_node *rn) /* req for L2 eth addr */ | |
65efcfce | 1265 | { |
d62a17ae | 1266 | struct rfapi_next_hop_entry *new; |
1267 | int have_vnc_tunnel_un = 0; | |
26a3ffd6 | 1268 | const struct prefix *p = agg_node_get_prefix(rn); |
65efcfce | 1269 | |
1e20238a | 1270 | #ifdef DEBUG_ENCAP_MONITOR |
40381db7 | 1271 | vnc_zlog_debug_verbose("%s: entry, bpi %p, rn %p", __func__, bpi, rn); |
65efcfce LB |
1272 | #endif |
1273 | ||
d62a17ae | 1274 | new = XCALLOC(MTYPE_RFAPI_NEXTHOP, sizeof(struct rfapi_next_hop_entry)); |
1275 | assert(new); | |
1276 | ||
1277 | new->prefix = *rprefix; | |
1278 | ||
40381db7 DS |
1279 | if (bpi->extra |
1280 | && decode_rd_type(bpi->extra->vnc.import.rd.val) | |
d62a17ae | 1281 | == RD_TYPE_VNC_ETH) { |
1282 | /* ethernet */ | |
1283 | ||
1284 | struct rfapi_vn_option *vo; | |
1285 | ||
1286 | vo = XCALLOC(MTYPE_RFAPI_VN_OPTION, | |
1287 | sizeof(struct rfapi_vn_option)); | |
1288 | assert(vo); | |
1289 | ||
1290 | vo->type = RFAPI_VN_OPTION_TYPE_L2ADDR; | |
1291 | ||
26a3ffd6 | 1292 | memcpy(&vo->v.l2addr.macaddr, &p->u.prefix_eth.octet, ETH_ALEN); |
d62a17ae | 1293 | /* only low 3 bytes of this are significant */ |
05864da7 DS |
1294 | (void)rfapiEcommunityGetLNI(bpi->attr->ecommunity, |
1295 | &vo->v.l2addr.logical_net_id); | |
1296 | (void)rfapiEcommunityGetEthernetTag(bpi->attr->ecommunity, | |
1297 | &vo->v.l2addr.tag_id); | |
d62a17ae | 1298 | |
1299 | /* local_nve_id comes from lower byte of RD type */ | |
40381db7 | 1300 | vo->v.l2addr.local_nve_id = bpi->extra->vnc.import.rd.val[1]; |
d62a17ae | 1301 | |
1302 | /* label comes from MP_REACH_NLRI label */ | |
40381db7 | 1303 | vo->v.l2addr.label = decode_label(&bpi->extra->label[0]); |
d62a17ae | 1304 | |
1305 | new->vn_options = vo; | |
1306 | ||
1307 | /* | |
1308 | * If there is an auxiliary prefix (i.e., host IP address), | |
1309 | * use it as the nexthop prefix instead of the query prefix | |
1310 | */ | |
40381db7 DS |
1311 | if (bpi->extra->vnc.import.aux_prefix.family) { |
1312 | rfapiQprefix2Rprefix(&bpi->extra->vnc.import.aux_prefix, | |
d62a17ae | 1313 | &new->prefix); |
1314 | } | |
1315 | } | |
1316 | ||
05864da7 DS |
1317 | bgp_encap_types tun_type = BGP_ENCAP_TYPE_MPLS; /*Default*/ |
1318 | new->prefix.cost = rfapiRfpCost(bpi->attr); | |
d62a17ae | 1319 | |
05864da7 | 1320 | struct bgp_attr_encap_subtlv *pEncap; |
d62a17ae | 1321 | |
05864da7 DS |
1322 | switch (BGP_MP_NEXTHOP_FAMILY(bpi->attr->mp_nexthop_len)) { |
1323 | case AF_INET: | |
1324 | new->vn_address.addr_family = AF_INET; | |
1325 | new->vn_address.addr.v4 = bpi->attr->mp_nexthop_global_in; | |
1326 | break; | |
d62a17ae | 1327 | |
05864da7 DS |
1328 | case AF_INET6: |
1329 | new->vn_address.addr_family = AF_INET6; | |
1330 | new->vn_address.addr.v6 = bpi->attr->mp_nexthop_global; | |
1331 | break; | |
d62a17ae | 1332 | |
05864da7 DS |
1333 | default: |
1334 | zlog_warn("%s: invalid vpn nexthop length: %d", __func__, | |
1335 | bpi->attr->mp_nexthop_len); | |
1336 | rfapi_free_next_hop_list(new); | |
1337 | return NULL; | |
1338 | } | |
d62a17ae | 1339 | |
05864da7 DS |
1340 | for (pEncap = bpi->attr->vnc_subtlvs; pEncap; pEncap = pEncap->next) { |
1341 | switch (pEncap->type) { | |
1342 | case BGP_VNC_SUBTLV_TYPE_LIFETIME: | |
1343 | /* use configured lifetime, not attr lifetime */ | |
1344 | break; | |
d62a17ae | 1345 | |
05864da7 DS |
1346 | default: |
1347 | zlog_warn("%s: unknown VNC option type %d", __func__, | |
1348 | pEncap->type); | |
d62a17ae | 1349 | |
05864da7 | 1350 | break; |
d62a17ae | 1351 | } |
05864da7 | 1352 | } |
d62a17ae | 1353 | |
05864da7 DS |
1354 | bgp_attr_extcom_tunnel_type(bpi->attr, &tun_type); |
1355 | if (tun_type == BGP_ENCAP_TYPE_MPLS) { | |
1356 | struct prefix p; | |
1357 | /* MPLS carries UN address in next hop */ | |
1358 | rfapiNexthop2Prefix(bpi->attr, &p); | |
1359 | if (p.family != 0) { | |
1360 | rfapiQprefix2Raddr(&p, &new->un_address); | |
1361 | have_vnc_tunnel_un = 1; | |
d62a17ae | 1362 | } |
05864da7 | 1363 | } |
d62a17ae | 1364 | |
05864da7 DS |
1365 | for (pEncap = bpi->attr->encap_subtlvs; pEncap; pEncap = pEncap->next) { |
1366 | switch (pEncap->type) { | |
1367 | case BGP_ENCAP_SUBTLV_TYPE_REMOTE_ENDPOINT: | |
1368 | /* | |
1369 | * Overrides ENCAP UN address, if any | |
1370 | */ | |
1371 | switch (pEncap->length) { | |
d62a17ae | 1372 | |
05864da7 DS |
1373 | case 8: |
1374 | new->un_address.addr_family = AF_INET; | |
1375 | memcpy(&new->un_address.addr.v4, pEncap->value, | |
1376 | 4); | |
1377 | have_vnc_tunnel_un = 1; | |
1378 | break; | |
d62a17ae | 1379 | |
05864da7 DS |
1380 | case 20: |
1381 | new->un_address.addr_family = AF_INET6; | |
1382 | memcpy(&new->un_address.addr.v6, pEncap->value, | |
1383 | 16); | |
1384 | have_vnc_tunnel_un = 1; | |
d62a17ae | 1385 | break; |
1386 | ||
1387 | default: | |
1388 | zlog_warn( | |
05864da7 DS |
1389 | "%s: invalid tunnel subtlv UN addr length (%d) for bpi %p", |
1390 | __func__, pEncap->length, bpi); | |
d62a17ae | 1391 | } |
05864da7 DS |
1392 | break; |
1393 | ||
1394 | default: | |
1395 | zlog_warn("%s: unknown Encap Attribute option type %d", | |
1396 | __func__, pEncap->type); | |
1397 | break; | |
d62a17ae | 1398 | } |
05864da7 | 1399 | } |
d62a17ae | 1400 | |
05864da7 | 1401 | new->un_options = rfapi_encap_tlv_to_un_option(bpi->attr); |
65efcfce | 1402 | |
1e20238a | 1403 | #ifdef DEBUG_ENCAP_MONITOR |
05864da7 DS |
1404 | vnc_zlog_debug_verbose("%s: line %d: have_vnc_tunnel_un=%d", __func__, |
1405 | __LINE__, have_vnc_tunnel_un); | |
65efcfce LB |
1406 | #endif |
1407 | ||
05864da7 DS |
1408 | if (!have_vnc_tunnel_un && bpi->extra) { |
1409 | /* | |
1410 | * use cached UN address from ENCAP route | |
1411 | */ | |
1412 | new->un_address.addr_family = bpi->extra->vnc.import.un_family; | |
1413 | switch (new->un_address.addr_family) { | |
1414 | case AF_INET: | |
1415 | new->un_address.addr.v4 = | |
1416 | bpi->extra->vnc.import.un.addr4; | |
1417 | break; | |
1418 | case AF_INET6: | |
1419 | new->un_address.addr.v6 = | |
1420 | bpi->extra->vnc.import.un.addr6; | |
1421 | break; | |
1422 | default: | |
1423 | zlog_warn("%s: invalid UN addr family (%d) for bpi %p", | |
1424 | __func__, new->un_address.addr_family, bpi); | |
1425 | rfapi_free_next_hop_list(new); | |
1426 | return NULL; | |
d62a17ae | 1427 | } |
1428 | } | |
1429 | ||
1430 | new->lifetime = lifetime; | |
1431 | return new; | |
65efcfce LB |
1432 | } |
1433 | ||
fe08ba7e | 1434 | int rfapiHasNonRemovedRoutes(struct agg_node *rn) |
65efcfce | 1435 | { |
40381db7 | 1436 | struct bgp_path_info *bpi; |
65efcfce | 1437 | |
40381db7 | 1438 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 1439 | struct prefix pfx; |
65efcfce | 1440 | |
40381db7 DS |
1441 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
1442 | && (bpi->extra && !rfapiGetUnAddrOfVpnBi(bpi, &pfx))) { | |
65efcfce | 1443 | |
d62a17ae | 1444 | return 1; |
1445 | } | |
1446 | } | |
1447 | return 0; | |
65efcfce LB |
1448 | } |
1449 | ||
1e20238a | 1450 | #ifdef DEBUG_IT_NODES |
d62a17ae | 1451 | /* |
65efcfce LB |
1452 | * DEBUG FUNCTION |
1453 | */ | |
fe08ba7e | 1454 | void rfapiDumpNode(struct agg_node *rn) |
65efcfce | 1455 | { |
40381db7 | 1456 | struct bgp_path_info *bpi; |
d62a17ae | 1457 | |
1458 | vnc_zlog_debug_verbose("%s: rn=%p", __func__, rn); | |
40381db7 | 1459 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 1460 | struct prefix pfx; |
40381db7 | 1461 | int ctrc = rfapiGetUnAddrOfVpnBi(bpi, &pfx); |
d62a17ae | 1462 | int nr; |
1463 | ||
40381db7 DS |
1464 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
1465 | && (bpi->extra && !ctrc)) { | |
d62a17ae | 1466 | |
1467 | nr = 1; | |
1468 | } else { | |
1469 | nr = 0; | |
1470 | } | |
1471 | ||
1472 | vnc_zlog_debug_verbose( | |
40381db7 DS |
1473 | " bpi=%p, nr=%d, flags=0x%x, extra=%p, ctrc=%d", bpi, |
1474 | nr, bpi->flags, bpi->extra, ctrc); | |
d62a17ae | 1475 | } |
65efcfce LB |
1476 | } |
1477 | #endif | |
1478 | ||
d62a17ae | 1479 | static int rfapiNhlAddNodeRoutes( |
fe08ba7e | 1480 | struct agg_node *rn, /* in */ |
d62a17ae | 1481 | struct rfapi_ip_prefix *rprefix, /* in */ |
1482 | uint32_t lifetime, /* in */ | |
1483 | int removed, /* in */ | |
1484 | struct rfapi_next_hop_entry **head, /* in/out */ | |
1485 | struct rfapi_next_hop_entry **tail, /* in/out */ | |
1486 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
fe08ba7e | 1487 | struct agg_node *rfd_rib_node, /* preload this NVE rib node */ |
d62a17ae | 1488 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1489 | { |
40381db7 | 1490 | struct bgp_path_info *bpi; |
d62a17ae | 1491 | struct rfapi_next_hop_entry *new; |
1492 | struct prefix pfx_un; | |
1493 | struct skiplist *seen_nexthops; | |
1494 | int count = 0; | |
26a3ffd6 DS |
1495 | const struct prefix *p = agg_node_get_prefix(rn); |
1496 | int is_l2 = (p->family == AF_ETHERNET); | |
d62a17ae | 1497 | |
fe08ba7e DS |
1498 | if (rfd_rib_node) { |
1499 | struct agg_table *atable = agg_get_table(rfd_rib_node); | |
84cc1207 PZ |
1500 | struct rfapi_descriptor *rfd; |
1501 | ||
fe08ba7e DS |
1502 | if (atable) { |
1503 | rfd = agg_get_table_info(atable); | |
84cc1207 | 1504 | |
fe08ba7e DS |
1505 | if (rfapiRibFTDFilterRecentPrefix(rfd, rn, |
1506 | pfx_target_original)) | |
1507 | return 0; | |
1508 | } | |
d62a17ae | 1509 | } |
1510 | ||
1511 | seen_nexthops = | |
63265b5c | 1512 | skiplist_new(0, vnc_prefix_cmp, prefix_free_lists); |
d62a17ae | 1513 | |
40381db7 | 1514 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 1515 | |
1516 | struct prefix pfx_vn; | |
1517 | struct prefix *newpfx; | |
1518 | ||
40381db7 | 1519 | if (removed && !CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
1e20238a | 1520 | #ifdef DEBUG_RETURNED_NHL |
d62a17ae | 1521 | vnc_zlog_debug_verbose( |
1522 | "%s: want holddown, this route not holddown, skip", | |
1523 | __func__); | |
65efcfce | 1524 | #endif |
d62a17ae | 1525 | continue; |
1526 | } | |
40381db7 | 1527 | if (!removed && CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
d62a17ae | 1528 | continue; |
1529 | } | |
1530 | ||
40381db7 | 1531 | if (!bpi->extra) { |
d62a17ae | 1532 | continue; |
1533 | } | |
1534 | ||
1535 | /* | |
1536 | * Check for excluded VN address | |
1537 | */ | |
40381db7 | 1538 | if (rfapiVpnBiNhEqualsPt(bpi, exclude_vnaddr)) |
d62a17ae | 1539 | continue; |
1540 | ||
1541 | /* | |
1542 | * Check for VN address (nexthop) copied already | |
1543 | */ | |
1544 | if (is_l2) { | |
1545 | /* L2 routes: semantic nexthop in aux_prefix; VN addr | |
1546 | * ain't it */ | |
40381db7 | 1547 | pfx_vn = bpi->extra->vnc.import.aux_prefix; |
d62a17ae | 1548 | } else { |
40381db7 | 1549 | rfapiNexthop2Prefix(bpi->attr, &pfx_vn); |
d62a17ae | 1550 | } |
1551 | if (!skiplist_search(seen_nexthops, &pfx_vn, NULL)) { | |
1e20238a | 1552 | #ifdef DEBUG_RETURNED_NHL |
d62a17ae | 1553 | vnc_zlog_debug_verbose( |
2dbe669b DA |
1554 | "%s: already put VN/nexthop %pFX, skip", |
1555 | __func__, &pfx_vn); | |
65efcfce | 1556 | #endif |
d62a17ae | 1557 | continue; |
1558 | } | |
65efcfce | 1559 | |
40381db7 | 1560 | if (rfapiGetUnAddrOfVpnBi(bpi, &pfx_un)) { |
1e20238a | 1561 | #ifdef DEBUG_ENCAP_MONITOR |
d62a17ae | 1562 | vnc_zlog_debug_verbose( |
40381db7 | 1563 | "%s: failed to get UN address of this VPN bpi", |
d62a17ae | 1564 | __func__); |
65efcfce | 1565 | #endif |
d62a17ae | 1566 | continue; |
1567 | } | |
1568 | ||
1569 | newpfx = prefix_new(); | |
1570 | *newpfx = pfx_vn; | |
1571 | skiplist_insert(seen_nexthops, newpfx, newpfx); | |
1572 | ||
40381db7 | 1573 | new = rfapiRouteInfo2NextHopEntry(rprefix, bpi, lifetime, rn); |
d62a17ae | 1574 | if (new) { |
1575 | if (rfapiRibPreloadBi(rfd_rib_node, &pfx_vn, &pfx_un, | |
40381db7 | 1576 | lifetime, bpi)) { |
d62a17ae | 1577 | /* duplicate filtered by RIB */ |
1578 | rfapi_free_next_hop_list(new); | |
1579 | new = NULL; | |
1580 | } | |
1581 | } | |
1582 | ||
1583 | if (new) { | |
1584 | if (*tail) { | |
1585 | (*tail)->next = new; | |
1586 | } else { | |
1587 | *head = new; | |
1588 | } | |
1589 | *tail = new; | |
1590 | ++count; | |
1591 | } | |
1592 | } | |
1593 | ||
1594 | skiplist_free(seen_nexthops); | |
1595 | ||
1596 | return count; | |
65efcfce LB |
1597 | } |
1598 | ||
1599 | ||
1600 | /* | |
1601 | * Breadth-first | |
1602 | * | |
1603 | * omit_node is meant for the situation where we are adding a subtree | |
1604 | * of a parent of some original requested node. The response already | |
1605 | * contains the original requested node, and we don't want to duplicate | |
1606 | * its routes in the list, so we skip it if the right or left node | |
1607 | * matches (of course, we still travel down its child subtrees). | |
1608 | */ | |
d62a17ae | 1609 | static int rfapiNhlAddSubtree( |
fe08ba7e | 1610 | struct agg_node *rn, /* in */ |
d62a17ae | 1611 | uint32_t lifetime, /* in */ |
1612 | struct rfapi_next_hop_entry **head, /* in/out */ | |
1613 | struct rfapi_next_hop_entry **tail, /* in/out */ | |
fe08ba7e | 1614 | struct agg_node *omit_node, /* in */ |
d62a17ae | 1615 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ |
fe08ba7e | 1616 | struct agg_table *rfd_rib_table, /* preload here */ |
d62a17ae | 1617 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1618 | { |
d62a17ae | 1619 | struct rfapi_ip_prefix rprefix; |
1620 | int rcount = 0; | |
1621 | ||
1622 | /* FIXME: need to find a better way here to work without sticking our | |
1623 | * hands in node->link */ | |
fe08ba7e DS |
1624 | if (agg_node_left(rn) && agg_node_left(rn) != omit_node) { |
1625 | if (agg_node_left(rn)->info) { | |
26a3ffd6 DS |
1626 | const struct prefix *p = |
1627 | agg_node_get_prefix(agg_node_left(rn)); | |
d62a17ae | 1628 | int count = 0; |
fe08ba7e | 1629 | struct agg_node *rib_rn = NULL; |
d62a17ae | 1630 | |
26a3ffd6 DS |
1631 | rfapiQprefix2Rprefix(p, &rprefix); |
1632 | if (rfd_rib_table) | |
1633 | rib_rn = agg_node_get(rfd_rib_table, p); | |
d62a17ae | 1634 | |
1635 | count = rfapiNhlAddNodeRoutes( | |
fe08ba7e DS |
1636 | agg_node_left(rn), &rprefix, lifetime, 0, head, |
1637 | tail, exclude_vnaddr, rib_rn, | |
1638 | pfx_target_original); | |
d62a17ae | 1639 | if (!count) { |
1640 | count = rfapiNhlAddNodeRoutes( | |
fe08ba7e DS |
1641 | agg_node_left(rn), &rprefix, lifetime, |
1642 | 1, head, tail, exclude_vnaddr, rib_rn, | |
d62a17ae | 1643 | pfx_target_original); |
1644 | } | |
1645 | rcount += count; | |
1646 | if (rib_rn) | |
fe08ba7e | 1647 | agg_unlock_node(rib_rn); |
d62a17ae | 1648 | } |
1649 | } | |
1650 | ||
fe08ba7e DS |
1651 | if (agg_node_right(rn) && agg_node_right(rn) != omit_node) { |
1652 | if (agg_node_right(rn)->info) { | |
26a3ffd6 DS |
1653 | const struct prefix *p = |
1654 | agg_node_get_prefix(agg_node_right(rn)); | |
d62a17ae | 1655 | int count = 0; |
fe08ba7e | 1656 | struct agg_node *rib_rn = NULL; |
d62a17ae | 1657 | |
26a3ffd6 DS |
1658 | rfapiQprefix2Rprefix(p, &rprefix); |
1659 | if (rfd_rib_table) | |
1660 | rib_rn = agg_node_get(rfd_rib_table, p); | |
1661 | ||
d62a17ae | 1662 | count = rfapiNhlAddNodeRoutes( |
fe08ba7e DS |
1663 | agg_node_right(rn), &rprefix, lifetime, 0, head, |
1664 | tail, exclude_vnaddr, rib_rn, | |
1665 | pfx_target_original); | |
d62a17ae | 1666 | if (!count) { |
1667 | count = rfapiNhlAddNodeRoutes( | |
fe08ba7e DS |
1668 | agg_node_right(rn), &rprefix, lifetime, |
1669 | 1, head, tail, exclude_vnaddr, rib_rn, | |
d62a17ae | 1670 | pfx_target_original); |
1671 | } | |
1672 | rcount += count; | |
1673 | if (rib_rn) | |
fe08ba7e | 1674 | agg_unlock_node(rib_rn); |
d62a17ae | 1675 | } |
1676 | } | |
1677 | ||
fe08ba7e | 1678 | if (agg_node_left(rn)) { |
d62a17ae | 1679 | rcount += rfapiNhlAddSubtree( |
fe08ba7e | 1680 | agg_node_left(rn), lifetime, head, tail, omit_node, |
d62a17ae | 1681 | exclude_vnaddr, rfd_rib_table, pfx_target_original); |
1682 | } | |
fe08ba7e | 1683 | if (agg_node_right(rn)) { |
d62a17ae | 1684 | rcount += rfapiNhlAddSubtree( |
fe08ba7e | 1685 | agg_node_right(rn), lifetime, head, tail, omit_node, |
d62a17ae | 1686 | exclude_vnaddr, rfd_rib_table, pfx_target_original); |
1687 | } | |
1688 | ||
1689 | return rcount; | |
65efcfce LB |
1690 | } |
1691 | ||
1692 | /* | |
1693 | * Implementation of ROUTE_LIST(node) from RFAPI-Import-Event-Handling.txt | |
1694 | * | |
1695 | * Construct an rfapi nexthop list based on the routes attached to | |
1696 | * the specified node. | |
1697 | * | |
1defdda8 DS |
1698 | * If there are any routes that do NOT have BGP_PATH_REMOVED set, |
1699 | * return those only. If there are ONLY routes with BGP_PATH_REMOVED, | |
65efcfce LB |
1700 | * then return those, and also include all the non-removed routes from the |
1701 | * next less-specific node (i.e., this node's parent) at the end. | |
1702 | */ | |
d62a17ae | 1703 | struct rfapi_next_hop_entry *rfapiRouteNode2NextHopList( |
fe08ba7e DS |
1704 | struct agg_node *rn, uint32_t lifetime, /* put into nexthop entries */ |
1705 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
1706 | struct agg_table *rfd_rib_table, /* preload here */ | |
1707 | struct prefix *pfx_target_original) /* query target */ | |
65efcfce | 1708 | { |
d62a17ae | 1709 | struct rfapi_ip_prefix rprefix; |
1710 | struct rfapi_next_hop_entry *answer = NULL; | |
1711 | struct rfapi_next_hop_entry *last = NULL; | |
fe08ba7e | 1712 | struct agg_node *parent; |
26a3ffd6 | 1713 | const struct prefix *p = agg_node_get_prefix(rn); |
d62a17ae | 1714 | int count = 0; |
fe08ba7e | 1715 | struct agg_node *rib_rn; |
65efcfce | 1716 | |
1e20238a | 1717 | #ifdef DEBUG_RETURNED_NHL |
26a3ffd6 | 1718 | vnc_zlog_debug_verbose("%s: called with node pfx=%rRN", __func__, rn); |
d62a17ae | 1719 | rfapiDebugBacktrace(); |
65efcfce LB |
1720 | #endif |
1721 | ||
26a3ffd6 | 1722 | rfapiQprefix2Rprefix(p, &rprefix); |
d62a17ae | 1723 | |
26a3ffd6 | 1724 | rib_rn = rfd_rib_table ? agg_node_get(rfd_rib_table, p) : NULL; |
d62a17ae | 1725 | |
1726 | /* | |
1727 | * Add non-withdrawn routes at this node | |
1728 | */ | |
1729 | count = rfapiNhlAddNodeRoutes(rn, &rprefix, lifetime, 0, &answer, &last, | |
1730 | exclude_vnaddr, rib_rn, | |
1731 | pfx_target_original); | |
1732 | ||
1733 | /* | |
1734 | * If the list has at least one entry, it's finished | |
1735 | */ | |
1736 | if (count) { | |
1737 | count += rfapiNhlAddSubtree(rn, lifetime, &answer, &last, NULL, | |
1738 | exclude_vnaddr, rfd_rib_table, | |
1739 | pfx_target_original); | |
1740 | vnc_zlog_debug_verbose("%s: %d nexthops, answer=%p", __func__, | |
1741 | count, answer); | |
1e20238a | 1742 | #ifdef DEBUG_RETURNED_NHL |
d62a17ae | 1743 | rfapiPrintNhl(NULL, answer); |
65efcfce | 1744 | #endif |
d62a17ae | 1745 | if (rib_rn) |
fe08ba7e | 1746 | agg_unlock_node(rib_rn); |
d62a17ae | 1747 | return answer; |
1748 | } | |
1749 | ||
1750 | /* | |
1751 | * Add withdrawn routes at this node | |
1752 | */ | |
1753 | count = rfapiNhlAddNodeRoutes(rn, &rprefix, lifetime, 1, &answer, &last, | |
1754 | exclude_vnaddr, rib_rn, | |
1755 | pfx_target_original); | |
1756 | if (rib_rn) | |
fe08ba7e | 1757 | agg_unlock_node(rib_rn); |
d62a17ae | 1758 | |
1759 | // rfapiPrintNhl(NULL, answer); | |
1760 | ||
1761 | /* | |
1762 | * walk up the tree until we find a node with non-deleted | |
1763 | * routes, then add them | |
1764 | */ | |
fe08ba7e DS |
1765 | for (parent = agg_node_parent(rn); parent; |
1766 | parent = agg_node_parent(parent)) { | |
d62a17ae | 1767 | if (rfapiHasNonRemovedRoutes(parent)) { |
1768 | break; | |
1769 | } | |
1770 | } | |
1771 | ||
1772 | /* | |
1773 | * Add non-withdrawn routes from less-specific prefix | |
1774 | */ | |
1775 | if (parent) { | |
26a3ffd6 DS |
1776 | const struct prefix *p = agg_node_get_prefix(parent); |
1777 | ||
1778 | rib_rn = rfd_rib_table ? agg_node_get(rfd_rib_table, p) : NULL; | |
1779 | rfapiQprefix2Rprefix(p, &rprefix); | |
d62a17ae | 1780 | count += rfapiNhlAddNodeRoutes(parent, &rprefix, lifetime, 0, |
1781 | &answer, &last, exclude_vnaddr, | |
1782 | rib_rn, pfx_target_original); | |
1783 | count += rfapiNhlAddSubtree(parent, lifetime, &answer, &last, | |
1784 | rn, exclude_vnaddr, rfd_rib_table, | |
1785 | pfx_target_original); | |
1786 | if (rib_rn) | |
fe08ba7e | 1787 | agg_unlock_node(rib_rn); |
d62a17ae | 1788 | } else { |
1789 | /* | |
1790 | * There is no parent with non-removed routes. Still need to | |
1791 | * add subtree of original node if it contributed routes to the | |
1792 | * answer. | |
1793 | */ | |
1794 | if (count) | |
1795 | count += rfapiNhlAddSubtree(rn, lifetime, &answer, | |
1796 | &last, rn, exclude_vnaddr, | |
1797 | rfd_rib_table, | |
1798 | pfx_target_original); | |
1799 | } | |
1800 | ||
1801 | vnc_zlog_debug_verbose("%s: %d nexthops, answer=%p", __func__, count, | |
1802 | answer); | |
1e20238a | 1803 | #ifdef DEBUG_RETURNED_NHL |
d62a17ae | 1804 | rfapiPrintNhl(NULL, answer); |
65efcfce | 1805 | #endif |
d62a17ae | 1806 | return answer; |
65efcfce LB |
1807 | } |
1808 | ||
1809 | /* | |
1810 | * Construct nexthop list of all routes in table | |
1811 | */ | |
d62a17ae | 1812 | struct rfapi_next_hop_entry *rfapiRouteTable2NextHopList( |
fe08ba7e DS |
1813 | struct agg_table *rt, uint32_t lifetime, /* put into nexthop entries */ |
1814 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
1815 | struct agg_table *rfd_rib_table, /* preload this NVE rib table */ | |
1816 | struct prefix *pfx_target_original) /* query target */ | |
65efcfce | 1817 | { |
fe08ba7e | 1818 | struct agg_node *rn; |
d62a17ae | 1819 | struct rfapi_next_hop_entry *biglist = NULL; |
1820 | struct rfapi_next_hop_entry *nhl; | |
1821 | struct rfapi_next_hop_entry *tail = NULL; | |
1822 | int count = 0; | |
1823 | ||
fe08ba7e | 1824 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
d62a17ae | 1825 | |
1826 | nhl = rfapiRouteNode2NextHopList(rn, lifetime, exclude_vnaddr, | |
1827 | rfd_rib_table, | |
1828 | pfx_target_original); | |
1829 | if (!tail) { | |
1830 | tail = biglist = nhl; | |
1831 | if (tail) | |
1832 | count = 1; | |
1833 | } else { | |
1834 | tail->next = nhl; | |
1835 | } | |
1836 | if (tail) { | |
1837 | while (tail->next) { | |
1838 | ++count; | |
1839 | tail = tail->next; | |
1840 | } | |
1841 | } | |
1842 | } | |
1843 | ||
1844 | vnc_zlog_debug_verbose("%s: returning %d routes", __func__, count); | |
1845 | return biglist; | |
65efcfce LB |
1846 | } |
1847 | ||
d62a17ae | 1848 | struct rfapi_next_hop_entry *rfapiEthRouteNode2NextHopList( |
fe08ba7e | 1849 | struct agg_node *rn, struct rfapi_ip_prefix *rprefix, |
d62a17ae | 1850 | uint32_t lifetime, /* put into nexthop entries */ |
1851 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
fe08ba7e | 1852 | struct agg_table *rfd_rib_table, /* preload NVE rib table */ |
d62a17ae | 1853 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1854 | { |
d62a17ae | 1855 | int count = 0; |
1856 | struct rfapi_next_hop_entry *answer = NULL; | |
1857 | struct rfapi_next_hop_entry *last = NULL; | |
fe08ba7e | 1858 | struct agg_node *rib_rn; |
65efcfce | 1859 | |
26a3ffd6 DS |
1860 | rib_rn = rfd_rib_table |
1861 | ? agg_node_get(rfd_rib_table, agg_node_get_prefix(rn)) | |
1862 | : NULL; | |
65efcfce | 1863 | |
d62a17ae | 1864 | count = rfapiNhlAddNodeRoutes(rn, rprefix, lifetime, 0, &answer, &last, |
1865 | NULL, rib_rn, pfx_target_original); | |
65efcfce | 1866 | |
1e20238a | 1867 | #ifdef DEBUG_ENCAP_MONITOR |
d62a17ae | 1868 | vnc_zlog_debug_verbose("%s: node %p: %d non-holddown routes", __func__, |
1869 | rn, count); | |
65efcfce LB |
1870 | #endif |
1871 | ||
d62a17ae | 1872 | if (!count) { |
1873 | count = rfapiNhlAddNodeRoutes(rn, rprefix, lifetime, 1, &answer, | |
1874 | &last, exclude_vnaddr, rib_rn, | |
1875 | pfx_target_original); | |
1876 | vnc_zlog_debug_verbose("%s: node %p: %d holddown routes", | |
1877 | __func__, rn, count); | |
1878 | } | |
65efcfce | 1879 | |
d62a17ae | 1880 | if (rib_rn) |
fe08ba7e | 1881 | agg_unlock_node(rib_rn); |
65efcfce | 1882 | |
1e20238a | 1883 | #ifdef DEBUG_RETURNED_NHL |
d62a17ae | 1884 | rfapiPrintNhl(NULL, answer); |
65efcfce LB |
1885 | #endif |
1886 | ||
d62a17ae | 1887 | return answer; |
65efcfce LB |
1888 | } |
1889 | ||
1890 | ||
1891 | /* | |
1892 | * Construct nexthop list of all routes in table | |
1893 | */ | |
d62a17ae | 1894 | struct rfapi_next_hop_entry *rfapiEthRouteTable2NextHopList( |
1895 | uint32_t logical_net_id, 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 */ | |
fe08ba7e | 1898 | struct agg_table *rfd_rib_table, /* preload NVE rib node */ |
d62a17ae | 1899 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1900 | { |
d62a17ae | 1901 | struct rfapi_import_table *it; |
1902 | struct bgp *bgp = bgp_get_default(); | |
fe08ba7e DS |
1903 | struct agg_table *rt; |
1904 | struct agg_node *rn; | |
d62a17ae | 1905 | struct rfapi_next_hop_entry *biglist = NULL; |
1906 | struct rfapi_next_hop_entry *nhl; | |
1907 | struct rfapi_next_hop_entry *tail = NULL; | |
1908 | int count = 0; | |
1909 | ||
1910 | ||
1911 | it = rfapiMacImportTableGet(bgp, logical_net_id); | |
1912 | rt = it->imported_vpn[AFI_L2VPN]; | |
1913 | ||
fe08ba7e | 1914 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
d62a17ae | 1915 | |
1916 | nhl = rfapiEthRouteNode2NextHopList( | |
1917 | rn, rprefix, lifetime, exclude_vnaddr, rfd_rib_table, | |
1918 | pfx_target_original); | |
1919 | if (!tail) { | |
1920 | tail = biglist = nhl; | |
1921 | if (tail) | |
1922 | count = 1; | |
1923 | } else { | |
1924 | tail->next = nhl; | |
1925 | } | |
1926 | if (tail) { | |
1927 | while (tail->next) { | |
1928 | ++count; | |
1929 | tail = tail->next; | |
1930 | } | |
1931 | } | |
1932 | } | |
1933 | ||
1934 | vnc_zlog_debug_verbose("%s: returning %d routes", __func__, count); | |
1935 | return biglist; | |
65efcfce LB |
1936 | } |
1937 | ||
1938 | /* | |
40381db7 DS |
1939 | * Insert a new bpi to the imported route table node, |
1940 | * keeping the list of BPIs sorted best route first | |
65efcfce | 1941 | */ |
fe08ba7e | 1942 | static void rfapiBgpInfoAttachSorted(struct agg_node *rn, |
4b7e6066 | 1943 | struct bgp_path_info *info_new, afi_t afi, |
d62a17ae | 1944 | safi_t safi) |
65efcfce | 1945 | { |
d62a17ae | 1946 | struct bgp *bgp; |
4b7e6066 DS |
1947 | struct bgp_path_info *prev; |
1948 | struct bgp_path_info *next; | |
d62a17ae | 1949 | char pfx_buf[PREFIX2STR_BUFFER]; |
1950 | ||
1951 | ||
1952 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
1953 | ||
1954 | if (VNC_DEBUG(IMPORT_BI_ATTACH)) { | |
1955 | vnc_zlog_debug_verbose("%s: info_new->peer=%p", __func__, | |
1956 | info_new->peer); | |
1957 | vnc_zlog_debug_verbose("%s: info_new->peer->su_remote=%p", | |
1958 | __func__, info_new->peer->su_remote); | |
1959 | } | |
1960 | ||
1961 | for (prev = NULL, next = rn->info; next; | |
1962 | prev = next, next = next->next) { | |
fdf81fa0 DS |
1963 | enum bgp_path_selection_reason reason; |
1964 | ||
1defdda8 DS |
1965 | if (!bgp |
1966 | || (!CHECK_FLAG(info_new->flags, BGP_PATH_REMOVED) | |
1967 | && CHECK_FLAG(next->flags, BGP_PATH_REMOVED)) | |
18ee8310 | 1968 | || bgp_path_info_cmp_compatible(bgp, info_new, next, |
fdf81fa0 DS |
1969 | pfx_buf, afi, safi, |
1970 | &reason) | |
d62a17ae | 1971 | == -1) { /* -1 if 1st is better */ |
1972 | break; | |
1973 | } | |
1974 | } | |
1975 | vnc_zlog_debug_verbose("%s: prev=%p, next=%p", __func__, prev, next); | |
1976 | if (prev) { | |
1977 | prev->next = info_new; | |
1978 | } else { | |
1979 | rn->info = info_new; | |
1980 | } | |
1981 | info_new->prev = prev; | |
1982 | info_new->next = next; | |
1983 | if (next) | |
1984 | next->prev = info_new; | |
1985 | bgp_attr_intern(info_new->attr); | |
65efcfce LB |
1986 | } |
1987 | ||
40381db7 | 1988 | static void rfapiBgpInfoDetach(struct agg_node *rn, struct bgp_path_info *bpi) |
65efcfce | 1989 | { |
d62a17ae | 1990 | /* |
1991 | * Remove the route (doubly-linked) | |
1992 | */ | |
40381db7 DS |
1993 | // bgp_attr_unintern (&bpi->attr); |
1994 | if (bpi->next) | |
1995 | bpi->next->prev = bpi->prev; | |
1996 | if (bpi->prev) | |
1997 | bpi->prev->next = bpi->next; | |
d62a17ae | 1998 | else |
40381db7 | 1999 | rn->info = bpi->next; |
65efcfce LB |
2000 | } |
2001 | ||
2002 | /* | |
2003 | * For L3-indexed import tables | |
2004 | */ | |
1a4189d4 | 2005 | static int rfapi_bi_peer_rd_cmp(const void *b1, const void *b2) |
65efcfce | 2006 | { |
1a4189d4 DS |
2007 | const struct bgp_path_info *bpi1 = b1; |
2008 | const struct bgp_path_info *bpi2 = b2; | |
d62a17ae | 2009 | |
2010 | /* | |
2011 | * Compare peers | |
2012 | */ | |
40381db7 | 2013 | if (bpi1->peer < bpi2->peer) |
d62a17ae | 2014 | return -1; |
40381db7 | 2015 | if (bpi1->peer > bpi2->peer) |
d62a17ae | 2016 | return 1; |
2017 | ||
2018 | /* | |
2019 | * compare RDs | |
2020 | */ | |
1a4189d4 DS |
2021 | return vnc_prefix_cmp( |
2022 | (const struct prefix *)&bpi1->extra->vnc.import.rd, | |
2023 | (const struct prefix *)&bpi2->extra->vnc.import.rd); | |
65efcfce LB |
2024 | } |
2025 | ||
2026 | /* | |
2027 | * For L2-indexed import tables | |
40381db7 | 2028 | * The BPIs in these tables should ALWAYS have an aux_prefix set because |
65efcfce LB |
2029 | * they arrive via IPv4 or IPv6 advertisements. |
2030 | */ | |
1a4189d4 | 2031 | static int rfapi_bi_peer_rd_aux_cmp(const void *b1, const void *b2) |
65efcfce | 2032 | { |
1a4189d4 DS |
2033 | const struct bgp_path_info *bpi1 = b1; |
2034 | const struct bgp_path_info *bpi2 = b2; | |
d62a17ae | 2035 | int rc; |
2036 | ||
2037 | /* | |
2038 | * Compare peers | |
2039 | */ | |
40381db7 | 2040 | if (bpi1->peer < bpi2->peer) |
d62a17ae | 2041 | return -1; |
40381db7 | 2042 | if (bpi1->peer > bpi2->peer) |
d62a17ae | 2043 | return 1; |
2044 | ||
2045 | /* | |
2046 | * compare RDs | |
2047 | */ | |
40381db7 DS |
2048 | rc = vnc_prefix_cmp((struct prefix *)&bpi1->extra->vnc.import.rd, |
2049 | (struct prefix *)&bpi2->extra->vnc.import.rd); | |
d62a17ae | 2050 | if (rc) { |
2051 | return rc; | |
2052 | } | |
2053 | ||
2054 | /* | |
2055 | * L2 import tables can have multiple entries with the | |
2056 | * same MAC address, same RD, but different L3 addresses. | |
2057 | * | |
2058 | * Use presence of aux_prefix with AF=ethernet and prefixlen=1 | |
2059 | * as magic value to signify explicit wildcarding of the aux_prefix. | |
40381db7 DS |
2060 | * This magic value will not appear in bona fide bpi entries in |
2061 | * the import table, but is allowed in the "fake" bpi used to | |
d62a17ae | 2062 | * probe the table when searching. (We have to test both b1 and b2 |
2063 | * because there is no guarantee of the order the test key and | |
2064 | * the real key will be passed) | |
2065 | */ | |
40381db7 DS |
2066 | if ((bpi1->extra->vnc.import.aux_prefix.family == AF_ETHERNET |
2067 | && (bpi1->extra->vnc.import.aux_prefix.prefixlen == 1)) | |
2068 | || (bpi2->extra->vnc.import.aux_prefix.family == AF_ETHERNET | |
2069 | && (bpi2->extra->vnc.import.aux_prefix.prefixlen == 1))) { | |
d62a17ae | 2070 | |
2071 | /* | |
2072 | * wildcard aux address specified | |
2073 | */ | |
2074 | return 0; | |
2075 | } | |
2076 | ||
40381db7 DS |
2077 | return vnc_prefix_cmp(&bpi1->extra->vnc.import.aux_prefix, |
2078 | &bpi2->extra->vnc.import.aux_prefix); | |
65efcfce LB |
2079 | } |
2080 | ||
2081 | ||
2082 | /* | |
2083 | * Index on RD and Peer | |
2084 | */ | |
fe08ba7e | 2085 | static void rfapiItBiIndexAdd(struct agg_node *rn, /* Import table VPN node */ |
40381db7 | 2086 | struct bgp_path_info *bpi) /* new BPI */ |
65efcfce | 2087 | { |
d62a17ae | 2088 | struct skiplist *sl; |
26a3ffd6 | 2089 | const struct prefix *p; |
d62a17ae | 2090 | |
2091 | assert(rn); | |
40381db7 DS |
2092 | assert(bpi); |
2093 | assert(bpi->extra); | |
d62a17ae | 2094 | |
2095 | { | |
06b9f471 DS |
2096 | char buf[RD_ADDRSTRLEN]; |
2097 | ||
40381db7 DS |
2098 | vnc_zlog_debug_verbose("%s: bpi %p, peer %p, rd %s", __func__, |
2099 | bpi, bpi->peer, | |
2100 | prefix_rd2str(&bpi->extra->vnc.import.rd, | |
06b9f471 | 2101 | buf, sizeof(buf))); |
d62a17ae | 2102 | } |
2103 | ||
2104 | sl = RFAPI_RDINDEX_W_ALLOC(rn); | |
2105 | if (!sl) { | |
26a3ffd6 DS |
2106 | p = agg_node_get_prefix(rn); |
2107 | if (AF_ETHERNET == p->family) { | |
d62a17ae | 2108 | sl = skiplist_new(0, rfapi_bi_peer_rd_aux_cmp, NULL); |
2109 | } else { | |
2110 | sl = skiplist_new(0, rfapi_bi_peer_rd_cmp, NULL); | |
2111 | } | |
2112 | RFAPI_IT_EXTRA_GET(rn)->u.vpn.idx_rd = sl; | |
fe08ba7e | 2113 | agg_lock_node(rn); /* for skiplist */ |
d62a17ae | 2114 | } |
40381db7 | 2115 | assert(!skiplist_insert(sl, (void *)bpi, (void *)bpi)); |
fe08ba7e | 2116 | agg_lock_node(rn); /* for skiplist entry */ |
d62a17ae | 2117 | |
40381db7 | 2118 | /* NB: BPIs in import tables are not refcounted */ |
65efcfce LB |
2119 | } |
2120 | ||
fe08ba7e | 2121 | static void rfapiItBiIndexDump(struct agg_node *rn) |
65efcfce | 2122 | { |
d62a17ae | 2123 | struct skiplist *sl; |
2124 | void *cursor = NULL; | |
4b7e6066 DS |
2125 | struct bgp_path_info *k; |
2126 | struct bgp_path_info *v; | |
d62a17ae | 2127 | int rc; |
2128 | ||
2129 | sl = RFAPI_RDINDEX(rn); | |
2130 | if (!sl) | |
2131 | return; | |
2132 | ||
2133 | for (rc = skiplist_next(sl, (void **)&k, (void **)&v, &cursor); !rc; | |
2134 | rc = skiplist_next(sl, (void **)&k, (void **)&v, &cursor)) { | |
2135 | ||
06b9f471 | 2136 | char buf[RD_ADDRSTRLEN]; |
872ed4c7 | 2137 | char buf_aux_pfx[PREFIX_STRLEN]; |
d62a17ae | 2138 | |
06b9f471 | 2139 | prefix_rd2str(&k->extra->vnc.import.rd, buf, sizeof(buf)); |
d62a17ae | 2140 | if (k->extra->vnc.import.aux_prefix.family) { |
2141 | prefix2str(&k->extra->vnc.import.aux_prefix, | |
06b9f471 DS |
2142 | buf_aux_pfx, sizeof(buf_aux_pfx)); |
2143 | } else | |
9825c71e | 2144 | strlcpy(buf_aux_pfx, "(none)", sizeof(buf_aux_pfx)); |
d62a17ae | 2145 | |
40381db7 | 2146 | vnc_zlog_debug_verbose("bpi %p, peer %p, rd %s, aux_prefix %s", |
d62a17ae | 2147 | k, k->peer, buf, buf_aux_pfx); |
2148 | } | |
65efcfce LB |
2149 | } |
2150 | ||
4b7e6066 | 2151 | static struct bgp_path_info *rfapiItBiIndexSearch( |
fe08ba7e | 2152 | struct agg_node *rn, /* Import table VPN node */ |
d62a17ae | 2153 | struct prefix_rd *prd, struct peer *peer, |
5a1ae2c2 | 2154 | const struct prefix *aux_prefix) /* optional L3 addr for L2 ITs */ |
65efcfce | 2155 | { |
d62a17ae | 2156 | struct skiplist *sl; |
2157 | int rc; | |
b8694ef4 DS |
2158 | struct bgp_path_info bpi_fake = {0}; |
2159 | struct bgp_path_info_extra bpi_extra = {0}; | |
40381db7 | 2160 | struct bgp_path_info *bpi_result; |
65efcfce | 2161 | |
d62a17ae | 2162 | sl = RFAPI_RDINDEX(rn); |
2163 | if (!sl) | |
2164 | return NULL; | |
65efcfce | 2165 | |
1e20238a | 2166 | #ifdef DEBUG_BI_SEARCH |
d62a17ae | 2167 | { |
06b9f471 | 2168 | char buf[RD_ADDRSTRLEN]; |
872ed4c7 | 2169 | char buf_aux_pfx[PREFIX_STRLEN]; |
d62a17ae | 2170 | |
d62a17ae | 2171 | if (aux_prefix) { |
872ed4c7 DS |
2172 | prefix2str(aux_prefix, buf_aux_pfx, |
2173 | sizeof(buf_aux_pfx)); | |
06b9f471 | 2174 | } else |
9825c71e | 2175 | strlcpy(buf_aux_pfx, "(nil)", sizeof(buf_aux_pfx)); |
d62a17ae | 2176 | |
2177 | vnc_zlog_debug_verbose("%s want prd=%s, peer=%p, aux_prefix=%s", | |
06b9f471 DS |
2178 | __func__, |
2179 | prefix_rd2str(prd, buf, sizeof(buf)), | |
2180 | peer, buf_aux_pfx); | |
d62a17ae | 2181 | rfapiItBiIndexDump(rn); |
2182 | } | |
65efcfce LB |
2183 | #endif |
2184 | ||
d62a17ae | 2185 | /* threshold is a WAG */ |
2186 | if (sl->count < 3) { | |
1e20238a | 2187 | #ifdef DEBUG_BI_SEARCH |
d62a17ae | 2188 | vnc_zlog_debug_verbose("%s: short list algorithm", __func__); |
65efcfce | 2189 | #endif |
d62a17ae | 2190 | /* if short list, linear search might be faster */ |
40381db7 DS |
2191 | for (bpi_result = rn->info; bpi_result; |
2192 | bpi_result = bpi_result->next) { | |
1e20238a | 2193 | #ifdef DEBUG_BI_SEARCH |
d62a17ae | 2194 | { |
06b9f471 DS |
2195 | char buf[RD_ADDRSTRLEN]; |
2196 | ||
d62a17ae | 2197 | vnc_zlog_debug_verbose( |
40381db7 DS |
2198 | "%s: bpi has prd=%s, peer=%p", __func__, |
2199 | prefix_rd2str(&bpi_result->extra->vnc | |
996c9314 LB |
2200 | .import.rd, |
2201 | buf, sizeof(buf)), | |
40381db7 | 2202 | bpi_result->peer); |
d62a17ae | 2203 | } |
65efcfce | 2204 | #endif |
40381db7 DS |
2205 | if (peer == bpi_result->peer |
2206 | && !prefix_cmp((struct prefix *)&bpi_result->extra | |
d62a17ae | 2207 | ->vnc.import.rd, |
2208 | (struct prefix *)prd)) { | |
65efcfce | 2209 | |
1e20238a | 2210 | #ifdef DEBUG_BI_SEARCH |
d62a17ae | 2211 | vnc_zlog_debug_verbose( |
2212 | "%s: peer and RD same, doing aux_prefix check", | |
2213 | __func__); | |
65efcfce | 2214 | #endif |
d62a17ae | 2215 | if (!aux_prefix |
40381db7 DS |
2216 | || !prefix_cmp( |
2217 | aux_prefix, | |
2218 | &bpi_result->extra->vnc.import | |
2219 | .aux_prefix)) { | |
65efcfce | 2220 | |
1e20238a | 2221 | #ifdef DEBUG_BI_SEARCH |
d62a17ae | 2222 | vnc_zlog_debug_verbose("%s: match", |
2223 | __func__); | |
65efcfce | 2224 | #endif |
d62a17ae | 2225 | break; |
2226 | } | |
2227 | } | |
2228 | } | |
40381db7 | 2229 | return bpi_result; |
d62a17ae | 2230 | } |
2231 | ||
40381db7 DS |
2232 | bpi_fake.peer = peer; |
2233 | bpi_fake.extra = &bpi_extra; | |
c4efd0f4 | 2234 | bpi_fake.extra->vnc.import.rd = *prd; |
d62a17ae | 2235 | if (aux_prefix) { |
40381db7 | 2236 | bpi_fake.extra->vnc.import.aux_prefix = *aux_prefix; |
d62a17ae | 2237 | } else { |
2238 | /* wildcard */ | |
40381db7 DS |
2239 | bpi_fake.extra->vnc.import.aux_prefix.family = AF_ETHERNET; |
2240 | bpi_fake.extra->vnc.import.aux_prefix.prefixlen = 1; | |
d62a17ae | 2241 | } |
2242 | ||
40381db7 | 2243 | rc = skiplist_search(sl, (void *)&bpi_fake, (void *)&bpi_result); |
d62a17ae | 2244 | |
2245 | if (rc) { | |
1e20238a | 2246 | #ifdef DEBUG_BI_SEARCH |
d62a17ae | 2247 | vnc_zlog_debug_verbose("%s: no match", __func__); |
65efcfce | 2248 | #endif |
d62a17ae | 2249 | return NULL; |
2250 | } | |
65efcfce | 2251 | |
1e20238a | 2252 | #ifdef DEBUG_BI_SEARCH |
40381db7 | 2253 | vnc_zlog_debug_verbose("%s: matched bpi=%p", __func__, bpi_result); |
65efcfce LB |
2254 | #endif |
2255 | ||
40381db7 | 2256 | return bpi_result; |
65efcfce LB |
2257 | } |
2258 | ||
fe08ba7e | 2259 | static void rfapiItBiIndexDel(struct agg_node *rn, /* Import table VPN node */ |
40381db7 | 2260 | struct bgp_path_info *bpi) /* old BPI */ |
65efcfce | 2261 | { |
d62a17ae | 2262 | struct skiplist *sl; |
2263 | int rc; | |
65efcfce | 2264 | |
d62a17ae | 2265 | { |
06b9f471 DS |
2266 | char buf[RD_ADDRSTRLEN]; |
2267 | ||
40381db7 DS |
2268 | vnc_zlog_debug_verbose("%s: bpi %p, peer %p, rd %s", __func__, |
2269 | bpi, bpi->peer, | |
2270 | prefix_rd2str(&bpi->extra->vnc.import.rd, | |
06b9f471 | 2271 | buf, sizeof(buf))); |
d62a17ae | 2272 | } |
65efcfce | 2273 | |
d62a17ae | 2274 | sl = RFAPI_RDINDEX(rn); |
2275 | assert(sl); | |
65efcfce | 2276 | |
40381db7 | 2277 | rc = skiplist_delete(sl, (void *)(bpi), (void *)bpi); |
d62a17ae | 2278 | if (rc) { |
2279 | rfapiItBiIndexDump(rn); | |
2280 | } | |
2281 | assert(!rc); | |
65efcfce | 2282 | |
fe08ba7e | 2283 | agg_unlock_node(rn); /* for skiplist entry */ |
65efcfce | 2284 | |
40381db7 | 2285 | /* NB: BPIs in import tables are not refcounted */ |
65efcfce LB |
2286 | } |
2287 | ||
2288 | /* | |
2289 | * Add a backreference at the ENCAP node to the VPN route that | |
2290 | * refers to it | |
2291 | */ | |
4b7e6066 DS |
2292 | static void |
2293 | rfapiMonitorEncapAdd(struct rfapi_import_table *import_table, | |
40381db7 DS |
2294 | struct prefix *p, /* VN address */ |
2295 | struct agg_node *vpn_rn, /* VPN node */ | |
2296 | struct bgp_path_info *vpn_bpi) /* VPN bpi/route */ | |
65efcfce | 2297 | { |
d62a17ae | 2298 | afi_t afi = family2afi(p->family); |
fe08ba7e | 2299 | struct agg_node *rn; |
d62a17ae | 2300 | struct rfapi_monitor_encap *m; |
2301 | ||
2302 | assert(afi); | |
fe08ba7e | 2303 | rn = agg_node_get(import_table->imported_encap[afi], p); /* locks rn */ |
d62a17ae | 2304 | assert(rn); |
2305 | ||
2306 | m = XCALLOC(MTYPE_RFAPI_MONITOR_ENCAP, | |
2307 | sizeof(struct rfapi_monitor_encap)); | |
2308 | assert(m); | |
2309 | ||
2310 | m->node = vpn_rn; | |
40381db7 | 2311 | m->bpi = vpn_bpi; |
d62a17ae | 2312 | m->rn = rn; |
2313 | ||
2314 | /* insert to encap node's list */ | |
2315 | m->next = RFAPI_MONITOR_ENCAP(rn); | |
2316 | if (m->next) | |
2317 | m->next->prev = m; | |
2318 | RFAPI_MONITOR_ENCAP_W_ALLOC(rn) = m; | |
2319 | ||
2320 | /* for easy lookup when deleting vpn route */ | |
40381db7 | 2321 | vpn_bpi->extra->vnc.import.hme = m; |
d62a17ae | 2322 | |
2323 | vnc_zlog_debug_verbose( | |
40381db7 DS |
2324 | "%s: it=%p, vpn_bpi=%p, afi=%d, encap rn=%p, setting vpn_bpi->extra->vnc.import.hme=%p", |
2325 | __func__, import_table, vpn_bpi, afi, rn, m); | |
d62a17ae | 2326 | |
2327 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, 0); | |
40381db7 | 2328 | bgp_attr_intern(vpn_bpi->attr); |
65efcfce LB |
2329 | } |
2330 | ||
40381db7 | 2331 | static void rfapiMonitorEncapDelete(struct bgp_path_info *vpn_bpi) |
65efcfce | 2332 | { |
d62a17ae | 2333 | /* |
2334 | * Remove encap monitor | |
2335 | */ | |
40381db7 DS |
2336 | vnc_zlog_debug_verbose("%s: vpn_bpi=%p", __func__, vpn_bpi); |
2337 | if (vpn_bpi->extra) { | |
2338 | struct rfapi_monitor_encap *hme = | |
2339 | vpn_bpi->extra->vnc.import.hme; | |
d62a17ae | 2340 | |
2341 | if (hme) { | |
2342 | ||
2343 | vnc_zlog_debug_verbose("%s: hme=%p", __func__, hme); | |
2344 | ||
2345 | /* Refcount checking takes too long here */ | |
2346 | // RFAPI_CHECK_REFCOUNT(hme->rn, SAFI_ENCAP, 0); | |
2347 | if (hme->next) | |
2348 | hme->next->prev = hme->prev; | |
2349 | if (hme->prev) | |
2350 | hme->prev->next = hme->next; | |
2351 | else | |
2352 | RFAPI_MONITOR_ENCAP_W_ALLOC(hme->rn) = | |
2353 | hme->next; | |
2354 | /* Refcount checking takes too long here */ | |
2355 | // RFAPI_CHECK_REFCOUNT(hme->rn, SAFI_ENCAP, 1); | |
2356 | ||
2357 | /* see if the struct rfapi_it_extra is empty and can be | |
2358 | * freed */ | |
2359 | rfapiMonitorExtraPrune(SAFI_ENCAP, hme->rn); | |
2360 | ||
fe08ba7e | 2361 | agg_unlock_node(hme->rn); /* decr ref count */ |
d62a17ae | 2362 | XFREE(MTYPE_RFAPI_MONITOR_ENCAP, hme); |
40381db7 | 2363 | vpn_bpi->extra->vnc.import.hme = NULL; |
d62a17ae | 2364 | } |
2365 | } | |
65efcfce LB |
2366 | } |
2367 | ||
2368 | /* | |
2369 | * quagga lib/thread.h says this must return int even though | |
2370 | * it doesn't do anything with the return value | |
2371 | */ | |
d62a17ae | 2372 | static int rfapiWithdrawTimerVPN(struct thread *t) |
65efcfce | 2373 | { |
d62a17ae | 2374 | struct rfapi_withdraw *wcb = t->arg; |
40381db7 | 2375 | struct bgp_path_info *bpi = wcb->info; |
d62a17ae | 2376 | struct bgp *bgp = bgp_get_default(); |
26a3ffd6 | 2377 | const struct prefix *p; |
d62a17ae | 2378 | struct rfapi_monitor_vpn *moved; |
2379 | afi_t afi; | |
2380 | ||
f4c713ae LB |
2381 | if (bgp == NULL) { |
2382 | vnc_zlog_debug_verbose( | |
2383 | "%s: NULL BGP pointer, assume shutdown race condition!!!", | |
2384 | __func__); | |
2385 | return 0; | |
2386 | } | |
892fedb6 | 2387 | if (CHECK_FLAG(bgp->flags, BGP_FLAG_DELETE_IN_PROGRESS)) { |
f4c713ae | 2388 | vnc_zlog_debug_verbose( |
892fedb6 DA |
2389 | "%s: BGP delete in progress, assume shutdown race condition!!!", |
2390 | __func__); | |
f4c713ae LB |
2391 | return 0; |
2392 | } | |
d62a17ae | 2393 | assert(wcb->node); |
40381db7 | 2394 | assert(bpi); |
d62a17ae | 2395 | assert(wcb->import_table); |
40381db7 | 2396 | assert(bpi->extra); |
d62a17ae | 2397 | |
2398 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_MPLS_VPN, wcb->lockoffset); | |
2399 | ||
26a3ffd6 DS |
2400 | vnc_zlog_debug_verbose("%s: removing bpi %p at prefix %pRN", __func__, |
2401 | bpi, wcb->node); | |
d62a17ae | 2402 | |
2403 | /* | |
2404 | * Remove the route (doubly-linked) | |
2405 | */ | |
40381db7 DS |
2406 | if (CHECK_FLAG(bpi->flags, BGP_PATH_VALID) |
2407 | && VALID_INTERIOR_TYPE(bpi->type)) | |
d62a17ae | 2408 | RFAPI_MONITOR_EXTERIOR(wcb->node)->valid_interior_count--; |
2409 | ||
26a3ffd6 DS |
2410 | p = agg_node_get_prefix(wcb->node); |
2411 | afi = family2afi(p->family); | |
d62a17ae | 2412 | wcb->import_table->holddown_count[afi] -= 1; /* keep count consistent */ |
40381db7 DS |
2413 | rfapiItBiIndexDel(wcb->node, bpi); |
2414 | rfapiBgpInfoDetach(wcb->node, bpi); /* with removed bpi */ | |
d62a17ae | 2415 | |
2416 | vnc_import_bgp_exterior_del_route_interior(bgp, wcb->import_table, | |
40381db7 | 2417 | wcb->node, bpi); |
d62a17ae | 2418 | |
2419 | ||
2420 | /* | |
2421 | * If VNC is configured to send response remove messages, AND | |
2422 | * if the removed route had a UN address, do response removal | |
2423 | * processing. | |
2424 | */ | |
2425 | if (!(bgp->rfapi_cfg->flags | |
2426 | & BGP_VNC_CONFIG_RESPONSE_REMOVAL_DISABLE)) { | |
2427 | ||
2428 | int has_valid_duplicate = 0; | |
40381db7 | 2429 | struct bgp_path_info *bpii; |
d62a17ae | 2430 | |
2431 | /* | |
2432 | * First check if there are any OTHER routes at this node | |
2433 | * that have the same nexthop and a valid UN address. If | |
2434 | * there are (e.g., from other peers), then the route isn't | |
2435 | * really gone, so skip sending a response removal message. | |
2436 | */ | |
40381db7 DS |
2437 | for (bpii = wcb->node->info; bpii; bpii = bpii->next) { |
2438 | if (rfapiVpnBiSamePtUn(bpi, bpii)) { | |
d62a17ae | 2439 | has_valid_duplicate = 1; |
2440 | break; | |
2441 | } | |
2442 | } | |
2443 | ||
2444 | vnc_zlog_debug_verbose("%s: has_valid_duplicate=%d", __func__, | |
2445 | has_valid_duplicate); | |
2446 | ||
2447 | if (!has_valid_duplicate) { | |
2448 | rfapiRibPendingDeleteRoute(bgp, wcb->import_table, afi, | |
2449 | wcb->node); | |
2450 | } | |
2451 | } | |
2452 | ||
40381db7 | 2453 | rfapiMonitorEncapDelete(bpi); |
d62a17ae | 2454 | |
2455 | /* | |
2456 | * If there are no VPN monitors at this VPN Node A, | |
2457 | * we are done | |
2458 | */ | |
2459 | if (!RFAPI_MONITOR_VPN(wcb->node)) { | |
2460 | vnc_zlog_debug_verbose("%s: no VPN monitors at this node", | |
2461 | __func__); | |
2462 | goto done; | |
2463 | } | |
2464 | ||
2465 | /* | |
2466 | * rfapiMonitorMoveShorter only moves monitors if there are | |
2467 | * no remaining valid routes at the current node | |
2468 | */ | |
2469 | moved = rfapiMonitorMoveShorter(wcb->node, 1); | |
2470 | ||
2471 | if (moved) { | |
2472 | rfapiMonitorMovedUp(wcb->import_table, wcb->node, moved->node, | |
2473 | moved); | |
2474 | } | |
65efcfce LB |
2475 | |
2476 | done: | |
d62a17ae | 2477 | /* |
40381db7 | 2478 | * Free VPN bpi |
d62a17ae | 2479 | */ |
40381db7 | 2480 | rfapiBgpInfoFree(bpi); |
d62a17ae | 2481 | wcb->info = NULL; |
2482 | ||
2483 | /* | |
2484 | * If route count at this node has gone to 0, withdraw exported prefix | |
2485 | */ | |
2486 | if (!wcb->node->info) { | |
2487 | /* see if the struct rfapi_it_extra is empty and can be freed */ | |
2488 | rfapiMonitorExtraPrune(SAFI_MPLS_VPN, wcb->node); | |
2489 | vnc_direct_bgp_del_prefix(bgp, wcb->import_table, wcb->node); | |
2490 | vnc_zebra_del_prefix(bgp, wcb->import_table, wcb->node); | |
2491 | } else { | |
2492 | /* | |
2493 | * nexthop change event | |
2494 | * vnc_direct_bgp_add_prefix() will recompute the VN addr | |
2495 | * ecommunity | |
2496 | */ | |
2497 | vnc_direct_bgp_add_prefix(bgp, wcb->import_table, wcb->node); | |
2498 | } | |
2499 | ||
2500 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_MPLS_VPN, 1 + wcb->lockoffset); | |
fe08ba7e | 2501 | agg_unlock_node(wcb->node); /* decr ref count */ |
d62a17ae | 2502 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); |
2503 | return 0; | |
65efcfce LB |
2504 | } |
2505 | ||
2506 | /* | |
2507 | * This works for multiprotocol extension, but not for plain ol' | |
2508 | * unicast IPv4 because that nexthop is stored in attr->nexthop | |
2509 | */ | |
d62a17ae | 2510 | void rfapiNexthop2Prefix(struct attr *attr, struct prefix *p) |
65efcfce | 2511 | { |
d62a17ae | 2512 | assert(p); |
2513 | assert(attr); | |
2514 | ||
2515 | memset(p, 0, sizeof(struct prefix)); | |
2516 | ||
2517 | switch (p->family = BGP_MP_NEXTHOP_FAMILY(attr->mp_nexthop_len)) { | |
2518 | case AF_INET: | |
2519 | p->u.prefix4 = attr->mp_nexthop_global_in; | |
2520 | p->prefixlen = 32; | |
2521 | break; | |
2522 | ||
2523 | case AF_INET6: | |
2524 | p->u.prefix6 = attr->mp_nexthop_global; | |
2525 | p->prefixlen = 128; | |
2526 | break; | |
2527 | ||
2528 | default: | |
2529 | vnc_zlog_debug_verbose("%s: Family is unknown = %d", __func__, | |
2530 | p->family); | |
2531 | } | |
65efcfce LB |
2532 | } |
2533 | ||
d62a17ae | 2534 | void rfapiUnicastNexthop2Prefix(afi_t afi, struct attr *attr, struct prefix *p) |
65efcfce | 2535 | { |
d62a17ae | 2536 | if (afi == AFI_IP) { |
2537 | p->family = AF_INET; | |
2538 | p->prefixlen = 32; | |
2539 | p->u.prefix4 = attr->nexthop; | |
2540 | } else { | |
2541 | rfapiNexthop2Prefix(attr, p); | |
2542 | } | |
65efcfce LB |
2543 | } |
2544 | ||
d62a17ae | 2545 | static int rfapiAttrNexthopAddrDifferent(struct prefix *p1, struct prefix *p2) |
65efcfce | 2546 | { |
d62a17ae | 2547 | if (!p1 || !p2) { |
2548 | vnc_zlog_debug_verbose("%s: p1 or p2 is NULL", __func__); | |
2549 | return 1; | |
2550 | } | |
2551 | ||
2552 | /* | |
2553 | * Are address families the same? | |
2554 | */ | |
2555 | if (p1->family != p2->family) { | |
2556 | return 1; | |
2557 | } | |
2558 | ||
2559 | switch (p1->family) { | |
2560 | case AF_INET: | |
2561 | if (IPV4_ADDR_SAME(&p1->u.prefix4, &p2->u.prefix4)) | |
2562 | return 0; | |
2563 | break; | |
2564 | ||
2565 | case AF_INET6: | |
2566 | if (IPV6_ADDR_SAME(&p1->u.prefix6, &p2->u.prefix6)) | |
2567 | return 0; | |
2568 | break; | |
2569 | ||
2570 | default: | |
2571 | assert(1); | |
2572 | } | |
2573 | ||
2574 | return 1; | |
65efcfce LB |
2575 | } |
2576 | ||
40381db7 DS |
2577 | static void rfapiCopyUnEncap2VPN(struct bgp_path_info *encap_bpi, |
2578 | struct bgp_path_info *vpn_bpi) | |
65efcfce | 2579 | { |
40381db7 DS |
2580 | if (!vpn_bpi || !vpn_bpi->extra) { |
2581 | zlog_warn("%s: no vpn bpi attr/extra, can't copy UN address", | |
d62a17ae | 2582 | __func__); |
2583 | return; | |
2584 | } | |
2585 | ||
40381db7 | 2586 | switch (BGP_MP_NEXTHOP_FAMILY(encap_bpi->attr->mp_nexthop_len)) { |
d62a17ae | 2587 | case AF_INET: |
2588 | ||
2589 | /* | |
2590 | * instrumentation to debug segfault of 091127 | |
2591 | */ | |
40381db7 DS |
2592 | vnc_zlog_debug_verbose("%s: vpn_bpi=%p", __func__, vpn_bpi); |
2593 | if (vpn_bpi) { | |
2594 | vnc_zlog_debug_verbose("%s: vpn_bpi->extra=%p", | |
2595 | __func__, vpn_bpi->extra); | |
d62a17ae | 2596 | } |
2597 | ||
40381db7 DS |
2598 | vpn_bpi->extra->vnc.import.un_family = AF_INET; |
2599 | vpn_bpi->extra->vnc.import.un.addr4 = | |
2600 | encap_bpi->attr->mp_nexthop_global_in; | |
d62a17ae | 2601 | break; |
2602 | ||
2603 | case AF_INET6: | |
40381db7 DS |
2604 | vpn_bpi->extra->vnc.import.un_family = AF_INET6; |
2605 | vpn_bpi->extra->vnc.import.un.addr6 = | |
2606 | encap_bpi->attr->mp_nexthop_global; | |
d62a17ae | 2607 | break; |
2608 | ||
2609 | default: | |
2610 | zlog_warn("%s: invalid encap nexthop length: %d", __func__, | |
40381db7 DS |
2611 | encap_bpi->attr->mp_nexthop_len); |
2612 | vpn_bpi->extra->vnc.import.un_family = 0; | |
d62a17ae | 2613 | break; |
2614 | } | |
65efcfce LB |
2615 | } |
2616 | ||
2617 | /* | |
2618 | * returns 0 on success, nonzero on error | |
2619 | */ | |
40381db7 DS |
2620 | static int |
2621 | rfapiWithdrawEncapUpdateCachedUn(struct rfapi_import_table *import_table, | |
2622 | struct bgp_path_info *encap_bpi, | |
2623 | struct agg_node *vpn_rn, | |
2624 | struct bgp_path_info *vpn_bpi) | |
65efcfce | 2625 | { |
40381db7 | 2626 | if (!encap_bpi) { |
d62a17ae | 2627 | |
2628 | /* | |
2629 | * clear cached UN address | |
2630 | */ | |
40381db7 | 2631 | if (!vpn_bpi || !vpn_bpi->extra) { |
d62a17ae | 2632 | zlog_warn( |
40381db7 | 2633 | "%s: missing VPN bpi/extra, can't clear UN addr", |
d62a17ae | 2634 | __func__); |
2635 | return 1; | |
2636 | } | |
40381db7 DS |
2637 | vpn_bpi->extra->vnc.import.un_family = 0; |
2638 | memset(&vpn_bpi->extra->vnc.import.un, 0, | |
2639 | sizeof(vpn_bpi->extra->vnc.import.un)); | |
2640 | if (CHECK_FLAG(vpn_bpi->flags, BGP_PATH_VALID)) { | |
2641 | if (rfapiGetVncTunnelUnAddr(vpn_bpi->attr, NULL)) { | |
2642 | UNSET_FLAG(vpn_bpi->flags, BGP_PATH_VALID); | |
2643 | if (VALID_INTERIOR_TYPE(vpn_bpi->type)) | |
d62a17ae | 2644 | RFAPI_MONITOR_EXTERIOR(vpn_rn) |
2645 | ->valid_interior_count--; | |
2646 | /* signal interior route withdrawal to | |
2647 | * import-exterior */ | |
2648 | vnc_import_bgp_exterior_del_route_interior( | |
2649 | bgp_get_default(), import_table, vpn_rn, | |
40381db7 | 2650 | vpn_bpi); |
d62a17ae | 2651 | } |
2652 | } | |
2653 | ||
2654 | } else { | |
40381db7 DS |
2655 | if (!vpn_bpi) { |
2656 | zlog_warn("%s: missing VPN bpi, can't clear UN addr", | |
d62a17ae | 2657 | __func__); |
2658 | return 1; | |
2659 | } | |
40381db7 DS |
2660 | rfapiCopyUnEncap2VPN(encap_bpi, vpn_bpi); |
2661 | if (!CHECK_FLAG(vpn_bpi->flags, BGP_PATH_VALID)) { | |
2662 | SET_FLAG(vpn_bpi->flags, BGP_PATH_VALID); | |
2663 | if (VALID_INTERIOR_TYPE(vpn_bpi->type)) | |
d62a17ae | 2664 | RFAPI_MONITOR_EXTERIOR(vpn_rn) |
2665 | ->valid_interior_count++; | |
2666 | /* signal interior route withdrawal to import-exterior | |
2667 | */ | |
2668 | vnc_import_bgp_exterior_add_route_interior( | |
2669 | bgp_get_default(), import_table, vpn_rn, | |
40381db7 | 2670 | vpn_bpi); |
d62a17ae | 2671 | } |
2672 | } | |
2673 | return 0; | |
65efcfce LB |
2674 | } |
2675 | ||
d62a17ae | 2676 | static int rfapiWithdrawTimerEncap(struct thread *t) |
65efcfce | 2677 | { |
d62a17ae | 2678 | struct rfapi_withdraw *wcb = t->arg; |
40381db7 | 2679 | struct bgp_path_info *bpi = wcb->info; |
d62a17ae | 2680 | int was_first_route = 0; |
2681 | struct rfapi_monitor_encap *em; | |
2682 | struct skiplist *vpn_node_sl = skiplist_new(0, NULL, NULL); | |
2683 | ||
2684 | assert(wcb->node); | |
40381db7 | 2685 | assert(bpi); |
d62a17ae | 2686 | assert(wcb->import_table); |
2687 | ||
2688 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_ENCAP, 0); | |
2689 | ||
40381db7 | 2690 | if (wcb->node->info == bpi) |
d62a17ae | 2691 | was_first_route = 1; |
2692 | ||
2693 | /* | |
40381db7 | 2694 | * Remove the route/bpi and free it |
d62a17ae | 2695 | */ |
40381db7 DS |
2696 | rfapiBgpInfoDetach(wcb->node, bpi); |
2697 | rfapiBgpInfoFree(bpi); | |
d62a17ae | 2698 | |
2699 | if (!was_first_route) | |
2700 | goto done; | |
2701 | ||
2702 | for (em = RFAPI_MONITOR_ENCAP(wcb->node); em; em = em->next) { | |
2703 | ||
2704 | /* | |
40381db7 DS |
2705 | * Update monitoring VPN BPIs with new encap info at the |
2706 | * head of the encap bpi chain (which could be NULL after | |
2707 | * removing the expiring bpi above) | |
d62a17ae | 2708 | */ |
2709 | if (rfapiWithdrawEncapUpdateCachedUn(wcb->import_table, | |
2710 | wcb->node->info, em->node, | |
40381db7 | 2711 | em->bpi)) |
d62a17ae | 2712 | continue; |
2713 | ||
2714 | /* | |
2715 | * Build a list of unique VPN nodes referenced by these | |
2716 | * monitors. | |
2717 | * Use a skiplist for speed. | |
2718 | */ | |
2719 | skiplist_insert(vpn_node_sl, em->node, em->node); | |
2720 | } | |
2721 | ||
2722 | ||
2723 | /* | |
2724 | * for each VPN node referenced in the ENCAP monitors: | |
2725 | */ | |
fe08ba7e | 2726 | struct agg_node *rn; |
d62a17ae | 2727 | while (!skiplist_first(vpn_node_sl, (void **)&rn, NULL)) { |
2728 | if (!wcb->node->info) { | |
2729 | struct rfapi_monitor_vpn *moved; | |
2730 | ||
2731 | moved = rfapiMonitorMoveShorter(rn, 0); | |
2732 | if (moved) { | |
2733 | // rfapiDoRouteCallback(wcb->import_table, | |
2734 | // moved->node, moved); | |
2735 | rfapiMonitorMovedUp(wcb->import_table, rn, | |
2736 | moved->node, moved); | |
2737 | } | |
2738 | } else { | |
2739 | // rfapiDoRouteCallback(wcb->import_table, rn, NULL); | |
2740 | rfapiMonitorItNodeChanged(wcb->import_table, rn, NULL); | |
2741 | } | |
2742 | skiplist_delete_first(vpn_node_sl); | |
2743 | } | |
65efcfce LB |
2744 | |
2745 | done: | |
d62a17ae | 2746 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_ENCAP, 1); |
fe08ba7e | 2747 | agg_unlock_node(wcb->node); /* decr ref count */ |
d62a17ae | 2748 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); |
2749 | skiplist_free(vpn_node_sl); | |
2750 | return 0; | |
65efcfce LB |
2751 | } |
2752 | ||
2753 | ||
2754 | /* | |
2755 | * Works for both VPN and ENCAP routes; timer_service_func is different | |
2756 | * in each case | |
2757 | */ | |
2758 | static void | |
d62a17ae | 2759 | rfapiBiStartWithdrawTimer(struct rfapi_import_table *import_table, |
40381db7 | 2760 | struct agg_node *rn, struct bgp_path_info *bpi, |
4b7e6066 | 2761 | afi_t afi, safi_t safi, |
d62a17ae | 2762 | int (*timer_service_func)(struct thread *)) |
65efcfce | 2763 | { |
d62a17ae | 2764 | uint32_t lifetime; |
2765 | struct rfapi_withdraw *wcb; | |
2766 | ||
40381db7 | 2767 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
a8fd6fde QY |
2768 | /* |
2769 | * Already on the path to being withdrawn, | |
2770 | * should already have a timer set up to | |
2771 | * delete it. | |
2772 | */ | |
2773 | vnc_zlog_debug_verbose( | |
2774 | "%s: already being withdrawn, do nothing", __func__); | |
2775 | return; | |
2776 | } | |
d62a17ae | 2777 | |
40381db7 | 2778 | rfapiGetVncLifetime(bpi->attr, &lifetime); |
d62a17ae | 2779 | vnc_zlog_debug_verbose("%s: VNC lifetime is %u", __func__, lifetime); |
2780 | ||
2781 | /* | |
2782 | * withdrawn routes get to hang around for a while | |
2783 | */ | |
40381db7 | 2784 | SET_FLAG(bpi->flags, BGP_PATH_REMOVED); |
d62a17ae | 2785 | |
2786 | /* set timer to remove the route later */ | |
2787 | lifetime = rfapiGetHolddownFromLifetime(lifetime); | |
2788 | vnc_zlog_debug_verbose("%s: using timeout %u", __func__, lifetime); | |
2789 | ||
2790 | /* | |
2791 | * Stash import_table, node, and info for use by timer | |
2792 | * service routine, which is supposed to free the wcb. | |
2793 | */ | |
2794 | wcb = XCALLOC(MTYPE_RFAPI_WITHDRAW, sizeof(struct rfapi_withdraw)); | |
2795 | assert(wcb); | |
2796 | wcb->node = rn; | |
40381db7 | 2797 | wcb->info = bpi; |
d62a17ae | 2798 | wcb->import_table = import_table; |
40381db7 | 2799 | bgp_attr_intern(bpi->attr); |
d62a17ae | 2800 | |
2801 | if (VNC_DEBUG(VERBOSE)) { | |
2802 | vnc_zlog_debug_verbose( | |
40381db7 | 2803 | "%s: wcb values: node=%p, info=%p, import_table=%p (bpi follows)", |
d62a17ae | 2804 | __func__, wcb->node, wcb->info, wcb->import_table); |
40381db7 | 2805 | rfapiPrintBi(NULL, bpi); |
d62a17ae | 2806 | } |
2807 | ||
2808 | ||
40381db7 | 2809 | assert(bpi->extra); |
d62a17ae | 2810 | if (lifetime > UINT32_MAX / 1001) { |
2811 | /* sub-optimal case, but will probably never happen */ | |
40381db7 | 2812 | bpi->extra->vnc.import.timer = NULL; |
d62a17ae | 2813 | thread_add_timer(bm->master, timer_service_func, wcb, lifetime, |
40381db7 | 2814 | &bpi->extra->vnc.import.timer); |
d62a17ae | 2815 | } else { |
2816 | static uint32_t jitter; | |
2817 | uint32_t lifetime_msec; | |
2818 | ||
2819 | /* | |
2820 | * the goal here is to spread out the timers so they are | |
2821 | * sortable in the skip list | |
2822 | */ | |
2823 | if (++jitter >= 1000) | |
2824 | jitter = 0; | |
2825 | ||
2826 | lifetime_msec = (lifetime * 1000) + jitter; | |
2827 | ||
40381db7 | 2828 | bpi->extra->vnc.import.timer = NULL; |
d62a17ae | 2829 | thread_add_timer_msec(bm->master, timer_service_func, wcb, |
2830 | lifetime_msec, | |
40381db7 | 2831 | &bpi->extra->vnc.import.timer); |
d62a17ae | 2832 | } |
2833 | ||
1defdda8 | 2834 | /* re-sort route list (BGP_PATH_REMOVED routes are last) */ |
4b7e6066 | 2835 | if (((struct bgp_path_info *)rn->info)->next) { |
40381db7 DS |
2836 | rfapiBgpInfoDetach(rn, bpi); |
2837 | rfapiBgpInfoAttachSorted(rn, bpi, afi, safi); | |
d62a17ae | 2838 | } |
65efcfce LB |
2839 | } |
2840 | ||
2841 | ||
5a1ae2c2 DS |
2842 | typedef void(rfapi_bi_filtered_import_f)(struct rfapi_import_table *table, |
2843 | int action, struct peer *peer, | |
2844 | void *rfd, const struct prefix *prefix, | |
2845 | const struct prefix *aux_prefix, | |
2846 | afi_t afi, struct prefix_rd *prd, | |
2847 | struct attr *attr, uint8_t type, | |
2848 | uint8_t sub_type, uint32_t *label); | |
65efcfce LB |
2849 | |
2850 | ||
d62a17ae | 2851 | static void rfapiExpireEncapNow(struct rfapi_import_table *it, |
40381db7 | 2852 | struct agg_node *rn, struct bgp_path_info *bpi) |
65efcfce | 2853 | { |
d62a17ae | 2854 | struct rfapi_withdraw *wcb; |
2855 | struct thread t; | |
2856 | ||
2857 | /* | |
2858 | * pretend we're an expiring timer | |
2859 | */ | |
2860 | wcb = XCALLOC(MTYPE_RFAPI_WITHDRAW, sizeof(struct rfapi_withdraw)); | |
40381db7 | 2861 | wcb->info = bpi; |
d62a17ae | 2862 | wcb->node = rn; |
2863 | wcb->import_table = it; | |
2864 | memset(&t, 0, sizeof(t)); | |
2865 | t.arg = wcb; | |
2866 | rfapiWithdrawTimerEncap(&t); /* frees wcb */ | |
65efcfce LB |
2867 | } |
2868 | ||
d62a17ae | 2869 | static int rfapiGetNexthop(struct attr *attr, struct prefix *prefix) |
65efcfce | 2870 | { |
d62a17ae | 2871 | switch (BGP_MP_NEXTHOP_FAMILY(attr->mp_nexthop_len)) { |
2872 | case AF_INET: | |
2873 | prefix->family = AF_INET; | |
2874 | prefix->prefixlen = 32; | |
2875 | prefix->u.prefix4 = attr->mp_nexthop_global_in; | |
2876 | break; | |
2877 | case AF_INET6: | |
2878 | prefix->family = AF_INET6; | |
2879 | prefix->prefixlen = 128; | |
2880 | prefix->u.prefix6 = attr->mp_nexthop_global; | |
2881 | break; | |
2882 | default: | |
2883 | vnc_zlog_debug_verbose("%s: unknown attr->mp_nexthop_len %d", | |
2884 | __func__, attr->mp_nexthop_len); | |
2885 | return EINVAL; | |
2886 | } | |
2887 | return 0; | |
65efcfce LB |
2888 | } |
2889 | ||
d62a17ae | 2890 | /* |
9b6d8fcf | 2891 | * import a bgp_path_info if its route target list intersects with the |
65efcfce LB |
2892 | * import table's route target list |
2893 | */ | |
d62a17ae | 2894 | static void rfapiBgpInfoFilteredImportEncap( |
2895 | struct rfapi_import_table *import_table, int action, struct peer *peer, | |
2896 | void *rfd, /* set for looped back routes */ | |
5a1ae2c2 DS |
2897 | const struct prefix *p, |
2898 | const struct prefix *aux_prefix, /* Unused for encap routes */ | |
d62a17ae | 2899 | afi_t afi, struct prefix_rd *prd, |
9b6d8fcf | 2900 | struct attr *attr, /* part of bgp_path_info */ |
5a1ae2c2 | 2901 | uint8_t type, /* part of bgp_path_info */ |
9b6d8fcf DS |
2902 | uint8_t sub_type, /* part of bgp_path_info */ |
2903 | uint32_t *label) /* part of bgp_path_info */ | |
65efcfce | 2904 | { |
fe08ba7e DS |
2905 | struct agg_table *rt = NULL; |
2906 | struct agg_node *rn; | |
4b7e6066 | 2907 | struct bgp_path_info *info_new; |
40381db7 | 2908 | struct bgp_path_info *bpi; |
4b7e6066 | 2909 | struct bgp_path_info *next; |
d62a17ae | 2910 | char buf[BUFSIZ]; |
2911 | ||
40381db7 DS |
2912 | struct prefix p_firstbpi_old; |
2913 | struct prefix p_firstbpi_new; | |
d62a17ae | 2914 | int replacing = 0; |
2915 | const char *action_str = NULL; | |
2916 | struct prefix un_prefix; | |
2917 | ||
2918 | struct bgp *bgp; | |
2919 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
2920 | ||
2921 | switch (action) { | |
2922 | case FIF_ACTION_UPDATE: | |
2923 | action_str = "update"; | |
2924 | break; | |
2925 | case FIF_ACTION_WITHDRAW: | |
2926 | action_str = "withdraw"; | |
2927 | break; | |
2928 | case FIF_ACTION_KILL: | |
2929 | action_str = "kill"; | |
2930 | break; | |
2931 | default: | |
2932 | assert(0); | |
2933 | break; | |
2934 | } | |
2935 | ||
2936 | vnc_zlog_debug_verbose( | |
2937 | "%s: entry: %s: prefix %s/%d", __func__, action_str, | |
2938 | inet_ntop(p->family, &p->u.prefix, buf, BUFSIZ), p->prefixlen); | |
2939 | ||
40381db7 DS |
2940 | memset(&p_firstbpi_old, 0, sizeof(p_firstbpi_old)); |
2941 | memset(&p_firstbpi_new, 0, sizeof(p_firstbpi_new)); | |
d62a17ae | 2942 | |
2943 | if (action == FIF_ACTION_UPDATE) { | |
2944 | /* | |
2945 | * Compare rt lists. If no intersection, don't import this route | |
2946 | * On a withdraw, peer and RD are sufficient to determine if | |
2947 | * we should act. | |
2948 | */ | |
2949 | if (!attr || !attr->ecommunity) { | |
2950 | ||
2951 | vnc_zlog_debug_verbose( | |
2952 | "%s: attr, extra, or ecommunity missing, not importing", | |
2953 | __func__); | |
2954 | return; | |
2955 | } | |
1e20238a | 2956 | #ifdef RFAPI_REQUIRE_ENCAP_BEEC |
d62a17ae | 2957 | if (!rfapiEcommunitiesMatchBeec(attr->ecommunity)) { |
2958 | vnc_zlog_debug_verbose( | |
2959 | "%s: it=%p: no match for BGP Encapsulation ecommunity", | |
2960 | __func__, import_table); | |
2961 | return; | |
2962 | } | |
65efcfce | 2963 | #endif |
d62a17ae | 2964 | if (!rfapiEcommunitiesIntersect(import_table->rt_import_list, |
2965 | attr->ecommunity)) { | |
2966 | ||
2967 | vnc_zlog_debug_verbose( | |
2968 | "%s: it=%p: no ecommunity intersection", | |
2969 | __func__, import_table); | |
2970 | return; | |
2971 | } | |
2972 | ||
2973 | /* | |
2974 | * Updates must also have a nexthop address | |
2975 | */ | |
2976 | memset(&un_prefix, 0, | |
2977 | sizeof(un_prefix)); /* keep valgrind happy */ | |
2978 | if (rfapiGetNexthop(attr, &un_prefix)) { | |
2979 | vnc_zlog_debug_verbose("%s: missing nexthop address", | |
2980 | __func__); | |
2981 | return; | |
2982 | } | |
2983 | } | |
2984 | ||
2985 | /* | |
2986 | * Figure out which radix tree the route would go into | |
2987 | */ | |
2988 | switch (afi) { | |
2989 | case AFI_IP: | |
2990 | case AFI_IP6: | |
2991 | rt = import_table->imported_encap[afi]; | |
2992 | break; | |
2993 | ||
2994 | default: | |
450971aa | 2995 | flog_err(EC_LIB_DEVELOPMENT, "%s: bad afi %d", __func__, afi); |
d62a17ae | 2996 | return; |
2997 | } | |
2998 | ||
2999 | /* | |
fe08ba7e | 3000 | * agg_node_lookup returns a node only if there is at least |
d62a17ae | 3001 | * one route attached. |
3002 | */ | |
fe08ba7e | 3003 | rn = agg_node_lookup(rt, p); |
65efcfce | 3004 | |
1e20238a | 3005 | #ifdef DEBUG_ENCAP_MONITOR |
d62a17ae | 3006 | vnc_zlog_debug_verbose("%s: initial encap lookup(it=%p) rn=%p", |
3007 | __func__, import_table, rn); | |
65efcfce LB |
3008 | #endif |
3009 | ||
d62a17ae | 3010 | if (rn) { |
3011 | ||
3012 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, 1); | |
fe08ba7e | 3013 | agg_unlock_node(rn); /* undo lock in agg_node_lookup */ |
d62a17ae | 3014 | |
3015 | ||
3016 | /* | |
40381db7 | 3017 | * capture nexthop of first bpi |
d62a17ae | 3018 | */ |
3019 | if (rn->info) { | |
3020 | rfapiNexthop2Prefix( | |
4b7e6066 | 3021 | ((struct bgp_path_info *)(rn->info))->attr, |
40381db7 | 3022 | &p_firstbpi_old); |
d62a17ae | 3023 | } |
3024 | ||
40381db7 | 3025 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 3026 | |
3027 | /* | |
9b6d8fcf | 3028 | * Does this bgp_path_info refer to the same route |
d62a17ae | 3029 | * as we are trying to add? |
3030 | */ | |
40381db7 DS |
3031 | vnc_zlog_debug_verbose("%s: comparing BPI %p", __func__, |
3032 | bpi); | |
d62a17ae | 3033 | |
3034 | ||
3035 | /* | |
3036 | * Compare RDs | |
3037 | * | |
40381db7 DS |
3038 | * RD of import table bpi is in |
3039 | * bpi->extra->vnc.import.rd RD of info_orig is in prd | |
d62a17ae | 3040 | */ |
40381db7 DS |
3041 | if (!bpi->extra) { |
3042 | vnc_zlog_debug_verbose("%s: no bpi->extra", | |
d62a17ae | 3043 | __func__); |
3044 | continue; | |
3045 | } | |
3046 | if (prefix_cmp( | |
40381db7 | 3047 | (struct prefix *)&bpi->extra->vnc.import.rd, |
d62a17ae | 3048 | (struct prefix *)prd)) { |
3049 | ||
3050 | vnc_zlog_debug_verbose("%s: prd does not match", | |
3051 | __func__); | |
3052 | continue; | |
3053 | } | |
3054 | ||
3055 | /* | |
3056 | * Compare peers | |
3057 | */ | |
40381db7 | 3058 | if (bpi->peer != peer) { |
d62a17ae | 3059 | vnc_zlog_debug_verbose( |
3060 | "%s: peer does not match", __func__); | |
3061 | continue; | |
3062 | } | |
3063 | ||
40381db7 | 3064 | vnc_zlog_debug_verbose("%s: found matching bpi", |
d62a17ae | 3065 | __func__); |
3066 | ||
40381db7 | 3067 | /* Same route. Delete this bpi, replace with new one */ |
d62a17ae | 3068 | |
3069 | if (action == FIF_ACTION_WITHDRAW) { | |
3070 | ||
3071 | vnc_zlog_debug_verbose( | |
26a3ffd6 DS |
3072 | "%s: withdrawing at prefix %pRN", |
3073 | __func__, rn); | |
d62a17ae | 3074 | |
3075 | rfapiBiStartWithdrawTimer( | |
40381db7 | 3076 | import_table, rn, bpi, afi, SAFI_ENCAP, |
d62a17ae | 3077 | rfapiWithdrawTimerEncap); |
3078 | ||
3079 | } else { | |
3080 | vnc_zlog_debug_verbose( | |
26a3ffd6 | 3081 | "%s: %s at prefix %pRN", __func__, |
d62a17ae | 3082 | ((action == FIF_ACTION_KILL) |
3083 | ? "killing" | |
3084 | : "replacing"), | |
26a3ffd6 | 3085 | rn); |
d62a17ae | 3086 | |
3087 | /* | |
3088 | * If this route is waiting to be deleted | |
3089 | * because of | |
3090 | * a previous withdraw, we must cancel its | |
3091 | * timer. | |
3092 | */ | |
40381db7 DS |
3093 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
3094 | && bpi->extra->vnc.import.timer) { | |
d62a17ae | 3095 | |
b3d6bc6e MS |
3096 | struct thread **t = |
3097 | &(bpi->extra->vnc.import.timer); | |
3098 | struct rfapi_withdraw *wcb = (*t)->arg; | |
d62a17ae | 3099 | |
3100 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
3101 | thread_cancel(t); | |
3102 | } | |
3103 | ||
3104 | if (action == FIF_ACTION_UPDATE) { | |
40381db7 DS |
3105 | rfapiBgpInfoDetach(rn, bpi); |
3106 | rfapiBgpInfoFree(bpi); | |
d62a17ae | 3107 | replacing = 1; |
3108 | } else { | |
3109 | /* | |
3110 | * Kill: do export stuff when removing | |
40381db7 | 3111 | * bpi |
d62a17ae | 3112 | */ |
3113 | struct rfapi_withdraw *wcb; | |
3114 | struct thread t; | |
3115 | ||
3116 | /* | |
3117 | * pretend we're an expiring timer | |
3118 | */ | |
3119 | wcb = XCALLOC( | |
3120 | MTYPE_RFAPI_WITHDRAW, | |
3121 | sizeof(struct rfapi_withdraw)); | |
40381db7 | 3122 | wcb->info = bpi; |
d62a17ae | 3123 | wcb->node = rn; |
3124 | wcb->import_table = import_table; | |
3125 | memset(&t, 0, sizeof(t)); | |
3126 | t.arg = wcb; | |
3127 | rfapiWithdrawTimerEncap( | |
3128 | &t); /* frees wcb */ | |
3129 | } | |
3130 | } | |
3131 | ||
3132 | break; | |
3133 | } | |
3134 | } | |
3135 | ||
3136 | if (rn) | |
3137 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, replacing ? 1 : 0); | |
3138 | ||
3139 | if (action == FIF_ACTION_WITHDRAW || action == FIF_ACTION_KILL) | |
3140 | return; | |
3141 | ||
3142 | info_new = | |
3143 | rfapiBgpInfoCreate(attr, peer, rfd, prd, type, sub_type, NULL); | |
3144 | ||
3145 | if (rn) { | |
3146 | if (!replacing) | |
40381db7 | 3147 | agg_lock_node(rn); /* incr ref count for new BPI */ |
d62a17ae | 3148 | } else { |
fe08ba7e | 3149 | rn = agg_node_get(rt, p); |
d62a17ae | 3150 | } |
3151 | ||
26a3ffd6 DS |
3152 | vnc_zlog_debug_verbose("%s: (afi=%d, rn=%p) inserting at prefix %pRN", |
3153 | __func__, afi, rn, rn); | |
d62a17ae | 3154 | |
3155 | rfapiBgpInfoAttachSorted(rn, info_new, afi, SAFI_ENCAP); | |
3156 | ||
3157 | /* | |
3158 | * Delete holddown routes from same NVE. See details in | |
3159 | * rfapiBgpInfoFilteredImportVPN() | |
3160 | */ | |
40381db7 | 3161 | for (bpi = info_new->next; bpi; bpi = next) { |
d62a17ae | 3162 | |
3163 | struct prefix pfx_un; | |
3164 | int un_match = 0; | |
3165 | ||
40381db7 DS |
3166 | next = bpi->next; |
3167 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) | |
d62a17ae | 3168 | continue; |
3169 | ||
3170 | /* | |
3171 | * We already match the VN address (it is the prefix | |
3172 | * of the route node) | |
3173 | */ | |
3174 | ||
40381db7 | 3175 | if (!rfapiGetNexthop(bpi->attr, &pfx_un) |
d62a17ae | 3176 | && prefix_same(&pfx_un, &un_prefix)) { |
3177 | ||
3178 | un_match = 1; | |
3179 | } | |
3180 | ||
3181 | if (!un_match) | |
3182 | continue; | |
3183 | ||
3184 | vnc_zlog_debug_verbose( | |
40381db7 | 3185 | "%s: removing holddown bpi matching NVE of new route", |
d62a17ae | 3186 | __func__); |
40381db7 | 3187 | if (bpi->extra->vnc.import.timer) { |
b3d6bc6e MS |
3188 | struct thread **t = |
3189 | &(bpi->extra->vnc.import.timer); | |
3190 | struct rfapi_withdraw *wcb = (*t)->arg; | |
d62a17ae | 3191 | |
3192 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
3193 | thread_cancel(t); | |
3194 | } | |
40381db7 | 3195 | rfapiExpireEncapNow(import_table, rn, bpi); |
d62a17ae | 3196 | } |
3197 | ||
4b7e6066 | 3198 | rfapiNexthop2Prefix(((struct bgp_path_info *)(rn->info))->attr, |
40381db7 | 3199 | &p_firstbpi_new); |
d62a17ae | 3200 | |
3201 | /* | |
3202 | * If the nexthop address of the selected Encap route (i.e., | |
3203 | * the UN address) has changed, then we must update the VPN | |
3204 | * routes that refer to this Encap route and possibly force | |
3205 | * rfapi callbacks. | |
3206 | */ | |
40381db7 | 3207 | if (rfapiAttrNexthopAddrDifferent(&p_firstbpi_old, &p_firstbpi_new)) { |
d62a17ae | 3208 | |
3209 | struct rfapi_monitor_encap *m; | |
3210 | struct rfapi_monitor_encap *mnext; | |
3211 | ||
fe08ba7e | 3212 | struct agg_node *referenced_vpn_prefix; |
d62a17ae | 3213 | |
3214 | /* | |
3215 | * Optimized approach: build radix tree on the fly to | |
3216 | * hold list of VPN nodes referenced by the ENCAP monitors | |
3217 | * | |
3218 | * The nodes in this table correspond to prefixes of VPN routes. | |
3219 | * The "info" pointer of the node points to a chain of | |
3220 | * struct rfapi_monitor_encap, each of which refers to a | |
3221 | * specific VPN node. | |
3222 | */ | |
fe08ba7e | 3223 | struct agg_table *referenced_vpn_table; |
d62a17ae | 3224 | |
fe08ba7e | 3225 | referenced_vpn_table = agg_table_init(); |
d62a17ae | 3226 | assert(referenced_vpn_table); |
3227 | ||
3228 | /* | |
3229 | * iterate over the set of monitors at this ENCAP node. | |
3230 | */ | |
1e20238a | 3231 | #ifdef DEBUG_ENCAP_MONITOR |
d62a17ae | 3232 | vnc_zlog_debug_verbose("%s: examining monitors at rn=%p", |
3233 | __func__, rn); | |
65efcfce | 3234 | #endif |
d62a17ae | 3235 | for (m = RFAPI_MONITOR_ENCAP(rn); m; m = m->next) { |
26a3ffd6 | 3236 | const struct prefix *p; |
d62a17ae | 3237 | |
3238 | /* | |
40381db7 | 3239 | * For each referenced bpi/route, copy the ENCAP route's |
d62a17ae | 3240 | * nexthop to the VPN route's cached UN address field |
3241 | * and set | |
3242 | * the address family of the cached UN address field. | |
3243 | */ | |
40381db7 DS |
3244 | rfapiCopyUnEncap2VPN(info_new, m->bpi); |
3245 | if (!CHECK_FLAG(m->bpi->flags, BGP_PATH_VALID)) { | |
3246 | SET_FLAG(m->bpi->flags, BGP_PATH_VALID); | |
3247 | if (VALID_INTERIOR_TYPE(m->bpi->type)) | |
d62a17ae | 3248 | RFAPI_MONITOR_EXTERIOR(m->node) |
3249 | ->valid_interior_count++; | |
3250 | vnc_import_bgp_exterior_add_route_interior( | |
40381db7 | 3251 | bgp, import_table, m->node, m->bpi); |
d62a17ae | 3252 | } |
3253 | ||
3254 | /* | |
3255 | * Build a list of unique VPN nodes referenced by these | |
3256 | * monitors | |
3257 | * | |
3258 | * There could be more than one VPN node here with a | |
3259 | * given | |
3260 | * prefix. Those are currently in an unsorted linear | |
3261 | * list | |
3262 | * per prefix. | |
3263 | */ | |
26a3ffd6 | 3264 | p = agg_node_get_prefix(m->node); |
fe08ba7e | 3265 | referenced_vpn_prefix = |
26a3ffd6 | 3266 | agg_node_get(referenced_vpn_table, p); |
d62a17ae | 3267 | assert(referenced_vpn_prefix); |
3268 | for (mnext = referenced_vpn_prefix->info; mnext; | |
3269 | mnext = mnext->next) { | |
3270 | ||
3271 | if (mnext->node == m->node) | |
3272 | break; | |
3273 | } | |
3274 | ||
3275 | if (mnext) { | |
3276 | /* | |
3277 | * already have an entry for this VPN node | |
3278 | */ | |
fe08ba7e | 3279 | agg_unlock_node(referenced_vpn_prefix); |
d62a17ae | 3280 | } else { |
3281 | mnext = XCALLOC( | |
3282 | MTYPE_RFAPI_MONITOR_ENCAP, | |
3283 | sizeof(struct rfapi_monitor_encap)); | |
3284 | assert(mnext); | |
3285 | mnext->node = m->node; | |
3286 | mnext->next = referenced_vpn_prefix->info; | |
3287 | referenced_vpn_prefix->info = mnext; | |
3288 | } | |
3289 | } | |
3290 | ||
3291 | /* | |
3292 | * for each VPN node referenced in the ENCAP monitors: | |
3293 | */ | |
fe08ba7e DS |
3294 | for (referenced_vpn_prefix = |
3295 | agg_route_top(referenced_vpn_table); | |
3296 | referenced_vpn_prefix; | |
3297 | referenced_vpn_prefix = | |
3298 | agg_route_next(referenced_vpn_prefix)) { | |
d62a17ae | 3299 | |
3300 | while ((m = referenced_vpn_prefix->info)) { | |
3301 | ||
fe08ba7e | 3302 | struct agg_node *n; |
d62a17ae | 3303 | |
3304 | rfapiMonitorMoveLonger(m->node); | |
fe08ba7e | 3305 | for (n = m->node; n; n = agg_node_parent(n)) { |
d62a17ae | 3306 | // rfapiDoRouteCallback(import_table, n, |
3307 | // NULL); | |
3308 | } | |
3309 | rfapiMonitorItNodeChanged(import_table, m->node, | |
3310 | NULL); | |
3311 | ||
3312 | referenced_vpn_prefix->info = m->next; | |
fe08ba7e | 3313 | agg_unlock_node(referenced_vpn_prefix); |
d62a17ae | 3314 | XFREE(MTYPE_RFAPI_MONITOR_ENCAP, m); |
3315 | } | |
3316 | } | |
fe08ba7e | 3317 | agg_table_finish(referenced_vpn_table); |
d62a17ae | 3318 | } |
3319 | ||
3320 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, 0); | |
65efcfce LB |
3321 | } |
3322 | ||
d62a17ae | 3323 | static void rfapiExpireVpnNow(struct rfapi_import_table *it, |
40381db7 | 3324 | struct agg_node *rn, struct bgp_path_info *bpi, |
d62a17ae | 3325 | int lockoffset) |
65efcfce | 3326 | { |
d62a17ae | 3327 | struct rfapi_withdraw *wcb; |
3328 | struct thread t; | |
3329 | ||
3330 | /* | |
3331 | * pretend we're an expiring timer | |
3332 | */ | |
3333 | wcb = XCALLOC(MTYPE_RFAPI_WITHDRAW, sizeof(struct rfapi_withdraw)); | |
40381db7 | 3334 | wcb->info = bpi; |
d62a17ae | 3335 | wcb->node = rn; |
3336 | wcb->import_table = it; | |
3337 | wcb->lockoffset = lockoffset; | |
3338 | memset(&t, 0, sizeof(t)); | |
3339 | t.arg = wcb; | |
3340 | rfapiWithdrawTimerVPN(&t); /* frees wcb */ | |
65efcfce LB |
3341 | } |
3342 | ||
3343 | ||
d62a17ae | 3344 | /* |
9b6d8fcf | 3345 | * import a bgp_path_info if its route target list intersects with the |
65efcfce LB |
3346 | * import table's route target list |
3347 | */ | |
d62a17ae | 3348 | void rfapiBgpInfoFilteredImportVPN( |
3349 | struct rfapi_import_table *import_table, int action, struct peer *peer, | |
3350 | void *rfd, /* set for looped back routes */ | |
5a1ae2c2 DS |
3351 | const struct prefix *p, |
3352 | const struct prefix *aux_prefix, /* AFI_L2VPN: optional IP */ | |
d62a17ae | 3353 | afi_t afi, struct prefix_rd *prd, |
9b6d8fcf | 3354 | struct attr *attr, /* part of bgp_path_info */ |
5a1ae2c2 | 3355 | uint8_t type, /* part of bgp_path_info */ |
9b6d8fcf DS |
3356 | uint8_t sub_type, /* part of bgp_path_info */ |
3357 | uint32_t *label) /* part of bgp_path_info */ | |
65efcfce | 3358 | { |
fe08ba7e DS |
3359 | struct agg_table *rt = NULL; |
3360 | struct agg_node *rn; | |
3361 | struct agg_node *n; | |
4b7e6066 | 3362 | struct bgp_path_info *info_new; |
40381db7 | 3363 | struct bgp_path_info *bpi; |
4b7e6066 | 3364 | struct bgp_path_info *next; |
d62a17ae | 3365 | char buf[BUFSIZ]; |
3366 | struct prefix vn_prefix; | |
3367 | struct prefix un_prefix; | |
3368 | int un_prefix_valid = 0; | |
fe08ba7e | 3369 | struct agg_node *ern; |
d62a17ae | 3370 | int replacing = 0; |
3371 | int original_had_routes = 0; | |
3372 | struct prefix original_nexthop; | |
3373 | const char *action_str = NULL; | |
3374 | int is_it_ce = 0; | |
3375 | ||
3376 | struct bgp *bgp; | |
3377 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
3378 | ||
3379 | switch (action) { | |
3380 | case FIF_ACTION_UPDATE: | |
3381 | action_str = "update"; | |
3382 | break; | |
3383 | case FIF_ACTION_WITHDRAW: | |
3384 | action_str = "withdraw"; | |
3385 | break; | |
3386 | case FIF_ACTION_KILL: | |
3387 | action_str = "kill"; | |
3388 | break; | |
3389 | default: | |
3390 | assert(0); | |
3391 | break; | |
3392 | } | |
3393 | ||
3394 | if (import_table == bgp->rfapi->it_ce) | |
3395 | is_it_ce = 1; | |
3396 | ||
3397 | vnc_zlog_debug_verbose("%s: entry: %s%s: prefix %s/%d: it %p, afi %s", | |
3398 | __func__, (is_it_ce ? "CE-IT " : ""), action_str, | |
3399 | rfapi_ntop(p->family, &p->u.prefix, buf, BUFSIZ), | |
3400 | p->prefixlen, import_table, afi2str(afi)); | |
3401 | ||
3402 | VNC_ITRCCK; | |
3403 | ||
3404 | /* | |
3405 | * Compare rt lists. If no intersection, don't import this route | |
3406 | * On a withdraw, peer and RD are sufficient to determine if | |
3407 | * we should act. | |
3408 | */ | |
3409 | if (action == FIF_ACTION_UPDATE) { | |
3410 | if (!attr || !attr->ecommunity) { | |
3411 | ||
3412 | vnc_zlog_debug_verbose( | |
3413 | "%s: attr, extra, or ecommunity missing, not importing", | |
3414 | __func__); | |
3415 | return; | |
3416 | } | |
3417 | if ((import_table != bgp->rfapi->it_ce) | |
3418 | && !rfapiEcommunitiesIntersect(import_table->rt_import_list, | |
3419 | attr->ecommunity)) { | |
3420 | ||
3421 | vnc_zlog_debug_verbose( | |
3422 | "%s: it=%p: no ecommunity intersection", | |
3423 | __func__, import_table); | |
3424 | return; | |
3425 | } | |
3426 | ||
3427 | memset(&vn_prefix, 0, | |
3428 | sizeof(vn_prefix)); /* keep valgrind happy */ | |
3429 | if (rfapiGetNexthop(attr, &vn_prefix)) { | |
3430 | /* missing nexthop address would be a bad, bad thing */ | |
3431 | vnc_zlog_debug_verbose("%s: missing nexthop", __func__); | |
3432 | return; | |
3433 | } | |
3434 | } | |
3435 | ||
3436 | /* | |
3437 | * Figure out which radix tree the route would go into | |
3438 | */ | |
3439 | switch (afi) { | |
3440 | case AFI_IP: | |
3441 | case AFI_IP6: | |
3442 | case AFI_L2VPN: | |
3443 | rt = import_table->imported_vpn[afi]; | |
3444 | break; | |
3445 | ||
3446 | default: | |
450971aa | 3447 | flog_err(EC_LIB_DEVELOPMENT, "%s: bad afi %d", __func__, afi); |
d62a17ae | 3448 | return; |
3449 | } | |
3450 | ||
3451 | /* clear it */ | |
3452 | memset(&original_nexthop, 0, sizeof(original_nexthop)); | |
3453 | ||
3454 | /* | |
fe08ba7e | 3455 | * agg_node_lookup returns a node only if there is at least |
d62a17ae | 3456 | * one route attached. |
3457 | */ | |
fe08ba7e | 3458 | rn = agg_node_lookup(rt, p); |
d62a17ae | 3459 | |
3460 | vnc_zlog_debug_verbose("%s: rn=%p", __func__, rn); | |
3461 | ||
3462 | if (rn) { | |
3463 | ||
3464 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, 1); | |
fe08ba7e | 3465 | agg_unlock_node(rn); /* undo lock in agg_node_lookup */ |
d62a17ae | 3466 | |
3467 | if (rn->info) | |
3468 | original_had_routes = 1; | |
3469 | ||
3470 | if (VNC_DEBUG(VERBOSE)) { | |
3471 | vnc_zlog_debug_verbose("%s: showing IT node on entry", | |
3472 | __func__); | |
3473 | rfapiShowItNode(NULL, rn); /* debug */ | |
3474 | } | |
3475 | ||
3476 | /* | |
3477 | * Look for same route (will have same RD and peer) | |
3478 | */ | |
40381db7 | 3479 | bpi = rfapiItBiIndexSearch(rn, prd, peer, aux_prefix); |
d62a17ae | 3480 | |
40381db7 | 3481 | if (bpi) { |
d62a17ae | 3482 | |
3483 | /* | |
3484 | * This was an old test when we iterated over the | |
40381db7 | 3485 | * BPIs linearly. Since we're now looking up with |
d62a17ae | 3486 | * RD and peer, comparing types should not be |
3487 | * needed. Changed to assertion. | |
3488 | * | |
3489 | * Compare types. Doing so prevents a RFP-originated | |
3490 | * route from matching an imported route, for example. | |
3491 | */ | |
40381db7 | 3492 | if (VNC_DEBUG(VERBOSE) && bpi->type != type) |
3af8cb57 | 3493 | /* should be handled by RDs, but warn for now */ |
40381db7 DS |
3494 | zlog_warn("%s: type mismatch! (bpi=%d, arg=%d)", |
3495 | __func__, bpi->type, type); | |
d62a17ae | 3496 | |
40381db7 | 3497 | vnc_zlog_debug_verbose("%s: found matching bpi", |
d62a17ae | 3498 | __func__); |
3499 | ||
3500 | /* | |
3501 | * In the special CE table, withdrawals occur without | |
3502 | * holddown | |
3503 | */ | |
3504 | if (import_table == bgp->rfapi->it_ce) { | |
40381db7 | 3505 | vnc_direct_bgp_del_route_ce(bgp, rn, bpi); |
d62a17ae | 3506 | if (action == FIF_ACTION_WITHDRAW) |
3507 | action = FIF_ACTION_KILL; | |
3508 | } | |
3509 | ||
3510 | if (action == FIF_ACTION_WITHDRAW) { | |
3511 | ||
40381db7 DS |
3512 | int washolddown = CHECK_FLAG(bpi->flags, |
3513 | BGP_PATH_REMOVED); | |
d62a17ae | 3514 | |
3515 | vnc_zlog_debug_verbose( | |
26a3ffd6 DS |
3516 | "%s: withdrawing at prefix %pRN%s", |
3517 | __func__, rn, | |
d62a17ae | 3518 | (washolddown |
3519 | ? " (already being withdrawn)" | |
3520 | : "")); | |
3521 | ||
3522 | VNC_ITRCCK; | |
3523 | if (!washolddown) { | |
3524 | rfapiBiStartWithdrawTimer( | |
40381db7 | 3525 | import_table, rn, bpi, afi, |
d62a17ae | 3526 | SAFI_MPLS_VPN, |
3527 | rfapiWithdrawTimerVPN); | |
3528 | ||
3529 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 3530 | bpi, import_table, afi, -1); |
d62a17ae | 3531 | import_table->holddown_count[afi] += 1; |
3532 | } | |
3533 | VNC_ITRCCK; | |
3534 | } else { | |
3535 | vnc_zlog_debug_verbose( | |
26a3ffd6 | 3536 | "%s: %s at prefix %pRN", __func__, |
d62a17ae | 3537 | ((action == FIF_ACTION_KILL) |
3538 | ? "killing" | |
3539 | : "replacing"), | |
26a3ffd6 | 3540 | rn); |
d62a17ae | 3541 | |
3542 | /* | |
3543 | * If this route is waiting to be deleted | |
3544 | * because of | |
3545 | * a previous withdraw, we must cancel its | |
3546 | * timer. | |
3547 | */ | |
40381db7 DS |
3548 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
3549 | && bpi->extra->vnc.import.timer) { | |
d62a17ae | 3550 | |
b3d6bc6e MS |
3551 | struct thread **t = |
3552 | &(bpi->extra->vnc.import.timer); | |
3553 | struct rfapi_withdraw *wcb = (*t)->arg; | |
d62a17ae | 3554 | |
3555 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
3556 | thread_cancel(t); | |
3557 | ||
3558 | import_table->holddown_count[afi] -= 1; | |
3559 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 3560 | bpi, import_table, afi, 1); |
d62a17ae | 3561 | } |
3562 | /* | |
3563 | * decrement remote count (if route is remote) | |
3564 | * because | |
3565 | * we are going to remove it below | |
3566 | */ | |
40381db7 DS |
3567 | RFAPI_UPDATE_ITABLE_COUNT(bpi, import_table, |
3568 | afi, -1); | |
d62a17ae | 3569 | if (action == FIF_ACTION_UPDATE) { |
3570 | replacing = 1; | |
3571 | ||
3572 | /* | |
3573 | * make copy of original nexthop so we | |
3574 | * can see if it changed | |
3575 | */ | |
40381db7 | 3576 | rfapiGetNexthop(bpi->attr, |
d62a17ae | 3577 | &original_nexthop); |
3578 | ||
3579 | /* | |
40381db7 | 3580 | * remove bpi without doing any export |
d62a17ae | 3581 | * processing |
3582 | */ | |
40381db7 | 3583 | if (CHECK_FLAG(bpi->flags, |
1defdda8 | 3584 | BGP_PATH_VALID) |
40381db7 | 3585 | && VALID_INTERIOR_TYPE(bpi->type)) |
d62a17ae | 3586 | RFAPI_MONITOR_EXTERIOR(rn) |
3587 | ->valid_interior_count--; | |
40381db7 DS |
3588 | rfapiItBiIndexDel(rn, bpi); |
3589 | rfapiBgpInfoDetach(rn, bpi); | |
3590 | rfapiMonitorEncapDelete(bpi); | |
d62a17ae | 3591 | vnc_import_bgp_exterior_del_route_interior( |
40381db7 DS |
3592 | bgp, import_table, rn, bpi); |
3593 | rfapiBgpInfoFree(bpi); | |
d62a17ae | 3594 | } else { |
3595 | /* Kill */ | |
3596 | /* | |
40381db7 | 3597 | * remove bpi and do export processing |
d62a17ae | 3598 | */ |
3599 | import_table->holddown_count[afi] += 1; | |
40381db7 | 3600 | rfapiExpireVpnNow(import_table, rn, bpi, |
d62a17ae | 3601 | 0); |
3602 | } | |
3603 | } | |
3604 | } | |
3605 | } | |
3606 | ||
3607 | if (rn) | |
3608 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, replacing ? 1 : 0); | |
3609 | ||
3610 | if (action == FIF_ACTION_WITHDRAW || action == FIF_ACTION_KILL) { | |
3611 | VNC_ITRCCK; | |
3612 | return; | |
3613 | } | |
3614 | ||
3615 | info_new = | |
3616 | rfapiBgpInfoCreate(attr, peer, rfd, prd, type, sub_type, label); | |
3617 | ||
3618 | /* | |
3619 | * lookup un address in encap table | |
3620 | */ | |
fe08ba7e | 3621 | ern = agg_node_match(import_table->imported_encap[afi], &vn_prefix); |
d62a17ae | 3622 | if (ern) { |
3623 | rfapiCopyUnEncap2VPN(ern->info, info_new); | |
fe08ba7e | 3624 | agg_unlock_node(ern); /* undo lock in route_note_match */ |
d62a17ae | 3625 | } else { |
d62a17ae | 3626 | /* Not a big deal, just means VPN route got here first */ |
2dbe669b DA |
3627 | vnc_zlog_debug_verbose("%s: no encap route for vn addr %pFX", |
3628 | __func__, &vn_prefix); | |
d62a17ae | 3629 | info_new->extra->vnc.import.un_family = 0; |
3630 | } | |
3631 | ||
3632 | if (rn) { | |
3633 | if (!replacing) | |
fe08ba7e | 3634 | agg_lock_node(rn); |
d62a17ae | 3635 | } else { |
3636 | /* | |
3637 | * No need to increment reference count, so only "get" | |
3638 | * if the node is not there already | |
3639 | */ | |
fe08ba7e | 3640 | rn = agg_node_get(rt, p); |
d62a17ae | 3641 | } |
3642 | ||
3643 | /* | |
3644 | * For ethernet routes, if there is an accompanying IP address, | |
40381db7 | 3645 | * save it in the bpi |
d62a17ae | 3646 | */ |
3647 | if ((AFI_L2VPN == afi) && aux_prefix) { | |
3648 | ||
40381db7 DS |
3649 | vnc_zlog_debug_verbose("%s: setting BPI's aux_prefix", |
3650 | __func__); | |
d62a17ae | 3651 | info_new->extra->vnc.import.aux_prefix = *aux_prefix; |
3652 | } | |
3653 | ||
26a3ffd6 | 3654 | vnc_zlog_debug_verbose("%s: inserting bpi %p at prefix %pRN #%d", |
c10e14e9 DS |
3655 | __func__, info_new, rn, |
3656 | agg_node_get_lock_count(rn)); | |
d62a17ae | 3657 | |
3658 | rfapiBgpInfoAttachSorted(rn, info_new, afi, SAFI_MPLS_VPN); | |
3659 | rfapiItBiIndexAdd(rn, info_new); | |
3660 | if (!rfapiGetUnAddrOfVpnBi(info_new, NULL)) { | |
3661 | if (VALID_INTERIOR_TYPE(info_new->type)) | |
3662 | RFAPI_MONITOR_EXTERIOR(rn)->valid_interior_count++; | |
1defdda8 | 3663 | SET_FLAG(info_new->flags, BGP_PATH_VALID); |
d62a17ae | 3664 | } |
3665 | RFAPI_UPDATE_ITABLE_COUNT(info_new, import_table, afi, 1); | |
3666 | vnc_import_bgp_exterior_add_route_interior(bgp, import_table, rn, | |
3667 | info_new); | |
3668 | ||
3669 | if (import_table == bgp->rfapi->it_ce) | |
3670 | vnc_direct_bgp_add_route_ce(bgp, rn, info_new); | |
3671 | ||
3672 | if (VNC_DEBUG(VERBOSE)) { | |
3673 | vnc_zlog_debug_verbose("%s: showing IT node", __func__); | |
3674 | rfapiShowItNode(NULL, rn); /* debug */ | |
3675 | } | |
3676 | ||
3677 | rfapiMonitorEncapAdd(import_table, &vn_prefix, rn, info_new); | |
3678 | ||
3679 | if (!rfapiGetUnAddrOfVpnBi(info_new, &un_prefix)) { | |
3680 | ||
3681 | /* | |
3682 | * if we have a valid UN address (either via Encap route | |
3683 | * or via tunnel attribute), then we should attempt | |
3684 | * to move any monitors at less-specific nodes to this node | |
3685 | */ | |
3686 | rfapiMonitorMoveLonger(rn); | |
3687 | ||
3688 | un_prefix_valid = 1; | |
3689 | } | |
3690 | ||
3691 | /* | |
3692 | * 101129 Enhancement: if we add a route (implication: it is not | |
3693 | * in holddown), delete all other routes from this nve at this | |
3694 | * node that are in holddown, regardless of peer. | |
3695 | * | |
3696 | * Reasons it's OK to do that: | |
3697 | * | |
3698 | * - if the holddown route being deleted originally came from BGP VPN, | |
3699 | * it is already gone from BGP (implication of holddown), so there | |
3700 | * won't be any added inconsistency with the BGP RIB. | |
3701 | * | |
3702 | * - once a fresh route is added at a prefix, any routes in holddown | |
3703 | * at that prefix will not show up in RFP responses, so deleting | |
3704 | * the holddown routes won't affect the contents of responses. | |
3705 | * | |
3706 | * - lifetimes are supposed to be consistent, so there should not | |
3707 | * be a case where the fresh route has a shorter lifetime than | |
3708 | * the holddown route, so we don't expect the fresh route to | |
3709 | * disappear and complete its holddown time before the existing | |
3710 | * holddown routes time out. Therefore, we won't have a situation | |
3711 | * where we expect the existing holddown routes to be hidden and | |
3712 | * then to reappear sometime later (as holddown routes) in a | |
3713 | * RFP response. | |
3714 | * | |
3715 | * Among other things, this would enable us to skirt the problem | |
3716 | * of local holddown routes that refer to NVE descriptors that | |
3717 | * have already been closed (if the same NVE triggers a subsequent | |
3718 | * rfapi_open(), the new peer is different and doesn't match the | |
3719 | * peer of the holddown route, so the stale holddown route still | |
3720 | * hangs around until it times out instead of just being replaced | |
3721 | * by the fresh route). | |
3722 | */ | |
3723 | /* | |
40381db7 | 3724 | * We know that the new bpi will have been inserted before any routes |
d62a17ae | 3725 | * in holddown, so we can skip any that came before it |
3726 | */ | |
40381db7 | 3727 | for (bpi = info_new->next; bpi; bpi = next) { |
d62a17ae | 3728 | |
3729 | struct prefix pfx_vn; | |
3730 | struct prefix pfx_un; | |
3731 | int un_match = 0; | |
3732 | int remote_peer_match = 0; | |
3733 | ||
40381db7 | 3734 | next = bpi->next; |
d62a17ae | 3735 | |
3736 | /* | |
3737 | * Must be holddown | |
3738 | */ | |
40381db7 | 3739 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) |
d62a17ae | 3740 | continue; |
3741 | ||
3742 | /* | |
3743 | * Must match VN address (nexthop of VPN route) | |
3744 | */ | |
40381db7 | 3745 | if (rfapiGetNexthop(bpi->attr, &pfx_vn)) |
d62a17ae | 3746 | continue; |
3747 | if (!prefix_same(&pfx_vn, &vn_prefix)) | |
3748 | continue; | |
3749 | ||
3750 | if (un_prefix_valid && /* new route UN addr */ | |
40381db7 | 3751 | !rfapiGetUnAddrOfVpnBi(bpi, &pfx_un) |
d62a17ae | 3752 | && /* old route UN addr */ |
3753 | prefix_same(&pfx_un, &un_prefix)) { /* compare */ | |
3754 | un_match = 1; | |
3755 | } | |
40381db7 DS |
3756 | if (!RFAPI_LOCAL_BI(bpi) && !RFAPI_LOCAL_BI(info_new) |
3757 | && sockunion_same(&bpi->peer->su, &info_new->peer->su)) { | |
d62a17ae | 3758 | /* old & new are both remote, same peer */ |
3759 | remote_peer_match = 1; | |
3760 | } | |
3761 | ||
3762 | if (!un_match & !remote_peer_match) | |
3763 | continue; | |
3764 | ||
3765 | vnc_zlog_debug_verbose( | |
40381db7 | 3766 | "%s: removing holddown bpi matching NVE of new route", |
d62a17ae | 3767 | __func__); |
40381db7 | 3768 | if (bpi->extra->vnc.import.timer) { |
b3d6bc6e MS |
3769 | struct thread **t = |
3770 | &(bpi->extra->vnc.import.timer); | |
3771 | struct rfapi_withdraw *wcb = (*t)->arg; | |
d62a17ae | 3772 | |
3773 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
3774 | thread_cancel(t); | |
3775 | } | |
40381db7 | 3776 | rfapiExpireVpnNow(import_table, rn, bpi, 0); |
d62a17ae | 3777 | } |
3778 | ||
3779 | if (!original_had_routes) { | |
3780 | /* | |
3781 | * We went from 0 usable routes to 1 usable route. Perform the | |
3782 | * "Adding a Route" export process. | |
3783 | */ | |
3784 | vnc_direct_bgp_add_prefix(bgp, import_table, rn); | |
3785 | vnc_zebra_add_prefix(bgp, import_table, rn); | |
3786 | } else { | |
3787 | /* | |
3788 | * Check for nexthop change event | |
3789 | * Note: the prefix_same() test below detects two situations: | |
3790 | * 1. route is replaced, new route has different nexthop | |
3791 | * 2. new route is added (original_nexthop is 0) | |
3792 | */ | |
3793 | struct prefix new_nexthop; | |
3794 | ||
3795 | rfapiGetNexthop(attr, &new_nexthop); | |
3796 | if (!prefix_same(&original_nexthop, &new_nexthop)) { | |
3797 | /* | |
3798 | * nexthop change event | |
3799 | * vnc_direct_bgp_add_prefix() will recompute VN addr | |
3800 | * ecommunity | |
3801 | */ | |
3802 | vnc_direct_bgp_add_prefix(bgp, import_table, rn); | |
3803 | } | |
3804 | } | |
3805 | ||
3806 | if (!(bgp->rfapi_cfg->flags & BGP_VNC_CONFIG_CALLBACK_DISABLE)) { | |
fe08ba7e | 3807 | for (n = rn; n; n = agg_node_parent(n)) { |
d62a17ae | 3808 | // rfapiDoRouteCallback(import_table, n, NULL); |
3809 | } | |
3810 | rfapiMonitorItNodeChanged(import_table, rn, NULL); | |
3811 | } | |
3812 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, 0); | |
3813 | VNC_ITRCCK; | |
65efcfce LB |
3814 | } |
3815 | ||
21cf6b21 VJ |
3816 | static void rfapiBgpInfoFilteredImportBadSafi( |
3817 | struct rfapi_import_table *import_table, int action, struct peer *peer, | |
3818 | void *rfd, /* set for looped back routes */ | |
5a1ae2c2 DS |
3819 | const struct prefix *p, |
3820 | const struct prefix *aux_prefix, /* AFI_L2VPN: optional IP */ | |
21cf6b21 | 3821 | afi_t afi, struct prefix_rd *prd, |
9b6d8fcf | 3822 | struct attr *attr, /* part of bgp_path_info */ |
5a1ae2c2 | 3823 | uint8_t type, /* part of bgp_path_info */ |
9b6d8fcf DS |
3824 | uint8_t sub_type, /* part of bgp_path_info */ |
3825 | uint32_t *label) /* part of bgp_path_info */ | |
21cf6b21 VJ |
3826 | { |
3827 | vnc_zlog_debug_verbose("%s: Error, bad safi", __func__); | |
3828 | } | |
3829 | ||
65efcfce | 3830 | static rfapi_bi_filtered_import_f * |
d62a17ae | 3831 | rfapiBgpInfoFilteredImportFunction(safi_t safi) |
65efcfce | 3832 | { |
d62a17ae | 3833 | switch (safi) { |
3834 | case SAFI_MPLS_VPN: | |
3835 | return rfapiBgpInfoFilteredImportVPN; | |
3836 | ||
3837 | case SAFI_ENCAP: | |
3838 | return rfapiBgpInfoFilteredImportEncap; | |
5c525538 RW |
3839 | |
3840 | default: | |
3841 | /* not expected */ | |
1c50c1c0 | 3842 | flog_err(EC_LIB_DEVELOPMENT, "%s: bad safi %d", __func__, safi); |
21cf6b21 | 3843 | return rfapiBgpInfoFilteredImportBadSafi; |
d62a17ae | 3844 | } |
65efcfce LB |
3845 | } |
3846 | ||
d62a17ae | 3847 | void rfapiProcessUpdate(struct peer *peer, |
3848 | void *rfd, /* set when looped from RFP/RFAPI */ | |
5a1ae2c2 | 3849 | const struct prefix *p, struct prefix_rd *prd, |
d7c0a89a QY |
3850 | struct attr *attr, afi_t afi, safi_t safi, uint8_t type, |
3851 | uint8_t sub_type, uint32_t *label) | |
65efcfce | 3852 | { |
d62a17ae | 3853 | struct bgp *bgp; |
3854 | struct rfapi *h; | |
3855 | struct rfapi_import_table *it; | |
3856 | int has_ip_route = 1; | |
3857 | uint32_t lni = 0; | |
3858 | ||
3859 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
3860 | assert(bgp); | |
3861 | ||
3862 | h = bgp->rfapi; | |
3863 | assert(h); | |
3864 | ||
3865 | /* | |
3866 | * look at high-order byte of RD. FF means MAC | |
3867 | * address is present (VNC L2VPN) | |
3868 | */ | |
3869 | if ((safi == SAFI_MPLS_VPN) | |
3870 | && (decode_rd_type(prd->val) == RD_TYPE_VNC_ETH)) { | |
3871 | struct prefix pfx_mac_buf; | |
3872 | struct prefix pfx_nexthop_buf; | |
3873 | int rc; | |
3874 | ||
3875 | /* | |
3876 | * Set flag if prefix and nexthop are the same - don't | |
3877 | * add the route to normal IP-based import tables | |
3878 | */ | |
3879 | if (!rfapiGetNexthop(attr, &pfx_nexthop_buf)) { | |
3880 | if (!prefix_cmp(&pfx_nexthop_buf, p)) { | |
3881 | has_ip_route = 0; | |
3882 | } | |
3883 | } | |
3884 | ||
3885 | memset(&pfx_mac_buf, 0, sizeof(pfx_mac_buf)); | |
3886 | pfx_mac_buf.family = AF_ETHERNET; | |
3887 | pfx_mac_buf.prefixlen = 48; | |
3888 | memcpy(&pfx_mac_buf.u.prefix_eth.octet, prd->val + 2, 6); | |
3889 | ||
3890 | /* | |
3891 | * Find rt containing LNI (Logical Network ID), which | |
3892 | * _should_ always be present when mac address is present | |
3893 | */ | |
3894 | rc = rfapiEcommunityGetLNI(attr->ecommunity, &lni); | |
3895 | ||
3896 | vnc_zlog_debug_verbose( | |
3897 | "%s: rfapiEcommunityGetLNI returned %d, lni=%d, attr=%p", | |
3898 | __func__, rc, lni, attr); | |
8cea9547 | 3899 | if (!rc) { |
d62a17ae | 3900 | it = rfapiMacImportTableGet(bgp, lni); |
3901 | ||
3902 | rfapiBgpInfoFilteredImportVPN( | |
3903 | it, FIF_ACTION_UPDATE, peer, rfd, | |
3904 | &pfx_mac_buf, /* prefix */ | |
3905 | p, /* aux prefix: IP addr */ | |
3906 | AFI_L2VPN, prd, attr, type, sub_type, label); | |
3907 | } | |
3908 | } | |
3909 | ||
3910 | if (!has_ip_route) | |
3911 | return; | |
3912 | ||
3913 | /* | |
3914 | * Iterate over all import tables; do a filtered import | |
3915 | * for the afi/safi combination | |
3916 | */ | |
3917 | for (it = h->imports; it; it = it->next) { | |
3918 | (*rfapiBgpInfoFilteredImportFunction(safi))( | |
3919 | it, FIF_ACTION_UPDATE, peer, rfd, p, /* prefix */ | |
3920 | NULL, afi, prd, attr, type, sub_type, label); | |
3921 | } | |
3922 | ||
3923 | if (safi == SAFI_MPLS_VPN) { | |
3924 | vnc_direct_bgp_rh_add_route(bgp, afi, p, peer, attr); | |
d62a17ae | 3925 | rfapiBgpInfoFilteredImportVPN( |
3926 | bgp->rfapi->it_ce, FIF_ACTION_UPDATE, peer, rfd, | |
3927 | p, /* prefix */ | |
3928 | NULL, afi, prd, attr, type, sub_type, label); | |
3929 | } | |
65efcfce LB |
3930 | } |
3931 | ||
3932 | ||
5a1ae2c2 | 3933 | void rfapiProcessWithdraw(struct peer *peer, void *rfd, const struct prefix *p, |
d62a17ae | 3934 | struct prefix_rd *prd, struct attr *attr, afi_t afi, |
d7c0a89a | 3935 | safi_t safi, uint8_t type, int kill) |
65efcfce | 3936 | { |
d62a17ae | 3937 | struct bgp *bgp; |
3938 | struct rfapi *h; | |
3939 | struct rfapi_import_table *it; | |
3940 | ||
3941 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
3942 | assert(bgp); | |
3943 | ||
3944 | h = bgp->rfapi; | |
3945 | assert(h); | |
3946 | ||
3947 | /* | |
3948 | * look at high-order byte of RD. FF means MAC | |
3949 | * address is present (VNC L2VPN) | |
3950 | */ | |
3951 | if (h->import_mac != NULL && safi == SAFI_MPLS_VPN | |
3952 | && decode_rd_type(prd->val) == RD_TYPE_VNC_ETH) { | |
3953 | struct prefix pfx_mac_buf; | |
3954 | void *cursor = NULL; | |
3955 | int rc; | |
3956 | ||
3957 | memset(&pfx_mac_buf, 0, sizeof(pfx_mac_buf)); | |
3958 | pfx_mac_buf.family = AF_ETHERNET; | |
3959 | pfx_mac_buf.prefixlen = 48; | |
3960 | memcpy(&pfx_mac_buf.u.prefix_eth, prd->val + 2, 6); | |
3961 | ||
3962 | /* | |
3963 | * withdraw does not contain attrs, so we don't have | |
3964 | * access to the route's LNI, which would ordinarily | |
3965 | * select the specific mac-based import table. Instead, | |
3966 | * we must iterate over all mac-based tables and rely | |
3967 | * on the RD to match. | |
3968 | * | |
3969 | * If this approach is too slow, add an index where | |
3970 | * key is {RD, peer} and value is the import table | |
3971 | */ | |
3972 | for (rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
3973 | &cursor); | |
3974 | rc == 0; rc = skiplist_next(h->import_mac, NULL, | |
3975 | (void **)&it, &cursor)) { | |
65efcfce | 3976 | |
1e20238a | 3977 | #ifdef DEBUG_L2_EXTRA |
d62a17ae | 3978 | vnc_zlog_debug_verbose( |
3979 | "%s: calling rfapiBgpInfoFilteredImportVPN(it=%p, afi=AFI_L2VPN)", | |
3980 | __func__, it); | |
65efcfce LB |
3981 | #endif |
3982 | ||
d62a17ae | 3983 | rfapiBgpInfoFilteredImportVPN( |
3984 | it, | |
3985 | (kill ? FIF_ACTION_KILL : FIF_ACTION_WITHDRAW), | |
3986 | peer, rfd, &pfx_mac_buf, /* prefix */ | |
3987 | p, /* aux_prefix: IP */ | |
3988 | AFI_L2VPN, prd, attr, type, 0, | |
3989 | NULL); /* sub_type & label unused for withdraw | |
9d303b37 | 3990 | */ |
d62a17ae | 3991 | } |
3992 | } | |
3993 | ||
3994 | /* | |
3995 | * XXX For the case where the withdraw involves an L2 | |
3996 | * route with no IP information, we rely on the lack | |
3997 | * of RT-list intersection to filter out the withdraw | |
3998 | * from the IP-based import tables below | |
3999 | */ | |
4000 | ||
4001 | /* | |
4002 | * Iterate over all import tables; do a filtered import | |
4003 | * for the afi/safi combination | |
4004 | */ | |
4005 | ||
4006 | for (it = h->imports; it; it = it->next) { | |
4007 | (*rfapiBgpInfoFilteredImportFunction(safi))( | |
4008 | it, (kill ? FIF_ACTION_KILL : FIF_ACTION_WITHDRAW), | |
4009 | peer, rfd, p, /* prefix */ | |
4010 | NULL, afi, prd, attr, type, 0, | |
4011 | NULL); /* sub_type & label unused for withdraw */ | |
4012 | } | |
4013 | ||
4014 | /* TBD the deletion should happen after the lifetime expires */ | |
4015 | if (safi == SAFI_MPLS_VPN) | |
4016 | vnc_direct_bgp_rh_del_route(bgp, afi, p, peer); | |
4017 | ||
4018 | if (safi == SAFI_MPLS_VPN) { | |
4019 | rfapiBgpInfoFilteredImportVPN( | |
4020 | bgp->rfapi->it_ce, | |
4021 | (kill ? FIF_ACTION_KILL : FIF_ACTION_WITHDRAW), peer, | |
4022 | rfd, p, /* prefix */ | |
4023 | NULL, afi, prd, attr, type, 0, | |
4024 | NULL); /* sub_type & label unused for withdraw */ | |
4025 | } | |
65efcfce LB |
4026 | } |
4027 | ||
4028 | /* | |
4029 | * TBD optimized withdraw timer algorithm for case of many | |
4030 | * routes expiring at the same time due to peer drop. | |
4031 | */ | |
4032 | /* | |
40381db7 | 4033 | * 1. Visit all BPIs in all ENCAP import tables. |
65efcfce | 4034 | * |
40381db7 DS |
4035 | * a. If a bpi's peer is the failed peer, remove the bpi. |
4036 | * b. If the removed ENCAP bpi was first in the list of | |
4037 | * BPIs at this ENCAP node, loop over all monitors | |
65efcfce LB |
4038 | * at this node: |
4039 | * | |
4040 | * (1) for each ENCAP monitor, loop over all its | |
4041 | * VPN node monitors and set their RFAPI_MON_FLAG_NEEDCALLBACK | |
4042 | * flags. | |
4043 | * | |
40381db7 DS |
4044 | * 2. Visit all BPIs in all VPN import tables. |
4045 | * a. If a bpi's peer is the failed peer, remove the bpi. | |
65efcfce LB |
4046 | * b. loop over all the VPN node monitors and set their |
4047 | * RFAPI_MON_FLAG_NEEDCALLBACK flags | |
40381db7 | 4048 | * c. If there are no BPIs left at this VPN node, |
65efcfce LB |
4049 | * |
4050 | */ | |
4051 | ||
4052 | ||
4053 | /* surprise, this gets called from peer_delete(), from rfapi_close() */ | |
d62a17ae | 4054 | static void rfapiProcessPeerDownRt(struct peer *peer, |
4055 | struct rfapi_import_table *import_table, | |
4056 | afi_t afi, safi_t safi) | |
65efcfce | 4057 | { |
fe08ba7e | 4058 | struct agg_node *rn; |
40381db7 | 4059 | struct bgp_path_info *bpi; |
fe08ba7e | 4060 | struct agg_table *rt; |
d62a17ae | 4061 | int (*timer_service_func)(struct thread *); |
4062 | ||
4063 | assert(afi == AFI_IP || afi == AFI_IP6); | |
4064 | ||
4065 | VNC_ITRCCK; | |
4066 | ||
4067 | switch (safi) { | |
4068 | case SAFI_MPLS_VPN: | |
4069 | rt = import_table->imported_vpn[afi]; | |
4070 | timer_service_func = rfapiWithdrawTimerVPN; | |
4071 | break; | |
4072 | case SAFI_ENCAP: | |
4073 | rt = import_table->imported_encap[afi]; | |
4074 | timer_service_func = rfapiWithdrawTimerEncap; | |
4075 | break; | |
4076 | default: | |
21fe4510 QY |
4077 | /* Suppress uninitialized variable warning */ |
4078 | rt = NULL; | |
4079 | timer_service_func = NULL; | |
d62a17ae | 4080 | assert(0); |
4081 | } | |
4082 | ||
4083 | ||
fe08ba7e | 4084 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
40381db7 DS |
4085 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
4086 | if (bpi->peer == peer) { | |
d62a17ae | 4087 | |
40381db7 | 4088 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
d62a17ae | 4089 | /* already in holddown, skip */ |
4090 | continue; | |
4091 | } | |
4092 | ||
4093 | if (safi == SAFI_MPLS_VPN) { | |
4094 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 4095 | bpi, import_table, afi, -1); |
d62a17ae | 4096 | import_table->holddown_count[afi] += 1; |
4097 | } | |
40381db7 | 4098 | rfapiBiStartWithdrawTimer(import_table, rn, bpi, |
d62a17ae | 4099 | afi, safi, |
4100 | timer_service_func); | |
4101 | } | |
4102 | } | |
4103 | } | |
4104 | VNC_ITRCCK; | |
65efcfce LB |
4105 | } |
4106 | ||
d62a17ae | 4107 | /* |
65efcfce LB |
4108 | * This gets called when a peer connection drops. We have to remove |
4109 | * all the routes from this peer. | |
4110 | * | |
4111 | * Current approach is crude. TBD Optimize by setting fewer timers and | |
4112 | * grouping withdrawn routes so we can generate callbacks more | |
4113 | * efficiently. | |
4114 | */ | |
d62a17ae | 4115 | void rfapiProcessPeerDown(struct peer *peer) |
65efcfce | 4116 | { |
d62a17ae | 4117 | struct bgp *bgp; |
4118 | struct rfapi *h; | |
4119 | struct rfapi_import_table *it; | |
4120 | ||
4121 | /* | |
4122 | * If this peer is a "dummy" peer structure atached to a RFAPI | |
4123 | * nve_descriptor, we don't need to walk the import tables | |
4124 | * because the routes are already withdrawn by rfapi_close() | |
4125 | */ | |
4126 | if (CHECK_FLAG(peer->flags, PEER_FLAG_IS_RFAPI_HD)) | |
4127 | return; | |
4128 | ||
4129 | /* | |
40381db7 DS |
4130 | * 1. Visit all BPIs in all ENCAP import tables. |
4131 | * Start withdraw timer on the BPIs that match peer. | |
d62a17ae | 4132 | * |
40381db7 DS |
4133 | * 2. Visit All BPIs in all VPN import tables. |
4134 | * Start withdraw timer on the BPIs that match peer. | |
d62a17ae | 4135 | */ |
4136 | ||
4137 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
4138 | if (!bgp) | |
4139 | return; | |
4140 | ||
4141 | h = bgp->rfapi; | |
4142 | assert(h); | |
4143 | ||
4144 | for (it = h->imports; it; it = it->next) { | |
4145 | rfapiProcessPeerDownRt(peer, it, AFI_IP, SAFI_ENCAP); | |
4146 | rfapiProcessPeerDownRt(peer, it, AFI_IP6, SAFI_ENCAP); | |
4147 | rfapiProcessPeerDownRt(peer, it, AFI_IP, SAFI_MPLS_VPN); | |
4148 | rfapiProcessPeerDownRt(peer, it, AFI_IP6, SAFI_MPLS_VPN); | |
4149 | } | |
4150 | ||
4151 | if (h->it_ce) { | |
4152 | rfapiProcessPeerDownRt(peer, h->it_ce, AFI_IP, SAFI_MPLS_VPN); | |
4153 | rfapiProcessPeerDownRt(peer, h->it_ce, AFI_IP6, SAFI_MPLS_VPN); | |
4154 | } | |
65efcfce LB |
4155 | } |
4156 | ||
4157 | /* | |
4158 | * Import an entire RIB (for an afi/safi) to an import table RIB, | |
4159 | * filtered according to the import table's RT list | |
4160 | * | |
4161 | * TBD: does this function need additions to match rfapiProcessUpdate() | |
d62a17ae | 4162 | * for, e.g., L2 handling? |
65efcfce | 4163 | */ |
d62a17ae | 4164 | static void rfapiBgpTableFilteredImport(struct bgp *bgp, |
4165 | struct rfapi_import_table *it, | |
4166 | afi_t afi, safi_t safi) | |
65efcfce | 4167 | { |
9bcb3eef DS |
4168 | struct bgp_dest *dest1; |
4169 | struct bgp_dest *dest2; | |
d62a17ae | 4170 | |
4171 | /* Only these SAFIs have 2-level RIBS */ | |
4172 | assert(safi == SAFI_MPLS_VPN || safi == SAFI_ENCAP); | |
4173 | ||
4174 | /* | |
4175 | * Now visit all the rd nodes and the nodes of all the | |
4176 | * route tables attached to them, and import the routes | |
4177 | * if they have matching route targets | |
4178 | */ | |
9bcb3eef DS |
4179 | for (dest1 = bgp_table_top(bgp->rib[afi][safi]); dest1; |
4180 | dest1 = bgp_route_next(dest1)) { | |
d62a17ae | 4181 | |
9bcb3eef | 4182 | if (bgp_dest_has_bgp_path_info_data(dest1)) { |
6f94b685 | 4183 | |
9bcb3eef DS |
4184 | for (dest2 = bgp_table_top( |
4185 | bgp_dest_get_bgp_table_info(dest1)); | |
4186 | dest2; dest2 = bgp_route_next(dest2)) { | |
d62a17ae | 4187 | |
40381db7 | 4188 | struct bgp_path_info *bpi; |
d62a17ae | 4189 | |
9bcb3eef | 4190 | for (bpi = bgp_dest_get_bgp_path_info(dest2); |
6f94b685 | 4191 | bpi; bpi = bpi->next) { |
d7c0a89a | 4192 | uint32_t label = 0; |
d62a17ae | 4193 | |
40381db7 | 4194 | if (CHECK_FLAG(bpi->flags, |
1defdda8 | 4195 | BGP_PATH_REMOVED)) |
d62a17ae | 4196 | continue; |
4197 | ||
40381db7 | 4198 | if (bpi->extra) |
d62a17ae | 4199 | label = decode_label( |
40381db7 | 4200 | &bpi->extra->label[0]); |
d62a17ae | 4201 | (*rfapiBgpInfoFilteredImportFunction( |
4202 | safi))( | |
4203 | it, /* which import table */ | |
40381db7 | 4204 | FIF_ACTION_UPDATE, bpi->peer, |
9bcb3eef DS |
4205 | NULL, |
4206 | bgp_dest_get_prefix(dest2), | |
d62a17ae | 4207 | NULL, afi, |
b54892e0 | 4208 | (struct prefix_rd *) |
9bcb3eef DS |
4209 | bgp_dest_get_prefix( |
4210 | dest1), | |
40381db7 DS |
4211 | bpi->attr, bpi->type, |
4212 | bpi->sub_type, &label); | |
d62a17ae | 4213 | } |
4214 | } | |
4215 | } | |
4216 | } | |
65efcfce LB |
4217 | } |
4218 | ||
4219 | ||
4220 | /* per-bgp-instance rfapi data */ | |
d62a17ae | 4221 | struct rfapi *bgp_rfapi_new(struct bgp *bgp) |
65efcfce | 4222 | { |
d62a17ae | 4223 | struct rfapi *h; |
e7038dde | 4224 | afi_t afi; |
d62a17ae | 4225 | struct rfapi_rfp_cfg *cfg = NULL; |
4226 | struct rfapi_rfp_cb_methods *cbm = NULL; | |
4227 | ||
4228 | assert(bgp->rfapi_cfg == NULL); | |
4229 | ||
9f5dc319 | 4230 | h = XCALLOC(MTYPE_RFAPI, sizeof(struct rfapi)); |
d62a17ae | 4231 | |
4232 | for (afi = AFI_IP; afi < AFI_MAX; afi++) { | |
fe08ba7e | 4233 | h->un[afi] = agg_table_init(); |
d62a17ae | 4234 | } |
4235 | ||
4236 | /* | |
4237 | * initialize the ce import table | |
4238 | */ | |
4239 | h->it_ce = XCALLOC(MTYPE_RFAPI_IMPORTTABLE, | |
4240 | sizeof(struct rfapi_import_table)); | |
fe08ba7e DS |
4241 | h->it_ce->imported_vpn[AFI_IP] = agg_table_init(); |
4242 | h->it_ce->imported_vpn[AFI_IP6] = agg_table_init(); | |
4243 | h->it_ce->imported_encap[AFI_IP] = agg_table_init(); | |
4244 | h->it_ce->imported_encap[AFI_IP6] = agg_table_init(); | |
d62a17ae | 4245 | rfapiBgpTableFilteredImport(bgp, h->it_ce, AFI_IP, SAFI_MPLS_VPN); |
4246 | rfapiBgpTableFilteredImport(bgp, h->it_ce, AFI_IP6, SAFI_MPLS_VPN); | |
4247 | ||
4248 | /* | |
4249 | * Set up work queue for deferred rfapi_close operations | |
4250 | */ | |
4251 | h->deferred_close_q = | |
4252 | work_queue_new(bm->master, "rfapi deferred close"); | |
4253 | h->deferred_close_q->spec.workfunc = rfapi_deferred_close_workfunc; | |
4254 | h->deferred_close_q->spec.data = h; | |
4255 | ||
4256 | h->rfp = rfp_start(bm->master, &cfg, &cbm); | |
4257 | bgp->rfapi_cfg = bgp_rfapi_cfg_new(cfg); | |
4258 | if (cbm != NULL) { | |
4259 | h->rfp_methods = *cbm; | |
4260 | } | |
4261 | return h; | |
65efcfce LB |
4262 | } |
4263 | ||
d62a17ae | 4264 | void bgp_rfapi_destroy(struct bgp *bgp, struct rfapi *h) |
65efcfce | 4265 | { |
e7038dde | 4266 | afi_t afi; |
0ae6124f | 4267 | |
d62a17ae | 4268 | if (bgp == NULL || h == NULL) |
4269 | return; | |
4270 | ||
4271 | if (h->resolve_nve_nexthop) { | |
4272 | skiplist_free(h->resolve_nve_nexthop); | |
4273 | h->resolve_nve_nexthop = NULL; | |
4274 | } | |
4275 | ||
fe08ba7e DS |
4276 | agg_table_finish(h->it_ce->imported_vpn[AFI_IP]); |
4277 | agg_table_finish(h->it_ce->imported_vpn[AFI_IP6]); | |
4278 | agg_table_finish(h->it_ce->imported_encap[AFI_IP]); | |
4279 | agg_table_finish(h->it_ce->imported_encap[AFI_IP6]); | |
d62a17ae | 4280 | |
4281 | if (h->import_mac) { | |
4282 | struct rfapi_import_table *it; | |
4283 | void *cursor; | |
4284 | int rc; | |
4285 | ||
9d303b37 DL |
4286 | for (cursor = NULL, |
4287 | rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4288 | &cursor); | |
d62a17ae | 4289 | !rc; rc = skiplist_next(h->import_mac, NULL, (void **)&it, |
4290 | &cursor)) { | |
4291 | ||
4292 | rfapiImportTableFlush(it); | |
4293 | XFREE(MTYPE_RFAPI_IMPORTTABLE, it); | |
4294 | } | |
4295 | skiplist_free(h->import_mac); | |
4296 | h->import_mac = NULL; | |
4297 | } | |
4298 | ||
e208c8f9 | 4299 | work_queue_free_and_null(&h->deferred_close_q); |
d62a17ae | 4300 | |
4301 | if (h->rfp != NULL) | |
4302 | rfp_stop(h->rfp); | |
0ae6124f LB |
4303 | |
4304 | for (afi = AFI_IP; afi < AFI_MAX; afi++) { | |
fe08ba7e | 4305 | agg_table_finish(h->un[afi]); |
0ae6124f LB |
4306 | } |
4307 | ||
d62a17ae | 4308 | XFREE(MTYPE_RFAPI_IMPORTTABLE, h->it_ce); |
4309 | XFREE(MTYPE_RFAPI, h); | |
65efcfce LB |
4310 | } |
4311 | ||
4312 | struct rfapi_import_table * | |
d62a17ae | 4313 | rfapiImportTableRefAdd(struct bgp *bgp, struct ecommunity *rt_import_list, |
4314 | struct rfapi_nve_group_cfg *rfg) | |
65efcfce | 4315 | { |
d62a17ae | 4316 | struct rfapi *h; |
4317 | struct rfapi_import_table *it; | |
4318 | afi_t afi; | |
4319 | ||
4320 | h = bgp->rfapi; | |
4321 | assert(h); | |
4322 | ||
4323 | for (it = h->imports; it; it = it->next) { | |
4324 | if (ecommunity_cmp(it->rt_import_list, rt_import_list)) | |
4325 | break; | |
4326 | } | |
4327 | ||
4328 | vnc_zlog_debug_verbose("%s: matched it=%p", __func__, it); | |
4329 | ||
4330 | if (!it) { | |
4331 | it = XCALLOC(MTYPE_RFAPI_IMPORTTABLE, | |
4332 | sizeof(struct rfapi_import_table)); | |
4333 | assert(it); | |
4334 | it->next = h->imports; | |
4335 | h->imports = it; | |
4336 | ||
4337 | it->rt_import_list = ecommunity_dup(rt_import_list); | |
4338 | it->rfg = rfg; | |
4339 | it->monitor_exterior_orphans = | |
63265b5c | 4340 | skiplist_new(0, NULL, prefix_free_lists); |
d62a17ae | 4341 | |
4342 | /* | |
4343 | * fill import route tables from RIBs | |
4344 | * | |
4345 | * Potential area for optimization. If this occurs when | |
4346 | * tables are large (e.g., the operator adds a nve group | |
4347 | * with a new RT list to a running system), it could take | |
4348 | * a while. | |
4349 | * | |
4350 | */ | |
4351 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
4352 | ||
fe08ba7e DS |
4353 | it->imported_vpn[afi] = agg_table_init(); |
4354 | it->imported_encap[afi] = agg_table_init(); | |
d62a17ae | 4355 | |
4356 | rfapiBgpTableFilteredImport(bgp, it, afi, | |
4357 | SAFI_MPLS_VPN); | |
4358 | rfapiBgpTableFilteredImport(bgp, it, afi, SAFI_ENCAP); | |
4359 | ||
4360 | vnc_import_bgp_exterior_redist_enable_it(bgp, afi, it); | |
4361 | } | |
4362 | } | |
4363 | ||
4364 | it->refcount += 1; | |
4365 | ||
4366 | return it; | |
65efcfce LB |
4367 | } |
4368 | ||
4369 | /* | |
4370 | * skiplist element free function | |
4371 | */ | |
d62a17ae | 4372 | static void delete_rem_pfx_na_free(void *na) |
65efcfce | 4373 | { |
d62a17ae | 4374 | uint32_t *pCounter = ((struct rfapi_nve_addr *)na)->info; |
65efcfce | 4375 | |
d62a17ae | 4376 | *pCounter += 1; |
4377 | XFREE(MTYPE_RFAPI_NVE_ADDR, na); | |
65efcfce LB |
4378 | } |
4379 | ||
4380 | /* | |
4381 | * Common deleter for IP and MAC import tables | |
4382 | */ | |
d62a17ae | 4383 | static void rfapiDeleteRemotePrefixesIt( |
4384 | struct bgp *bgp, struct rfapi_import_table *it, struct prefix *un, | |
4385 | struct prefix *vn, struct prefix *p, int delete_active, | |
4386 | int delete_holddown, uint32_t *pARcount, uint32_t *pAHcount, | |
4387 | uint32_t *pHRcount, uint32_t *pHHcount, | |
4388 | struct skiplist *uniq_active_nves, struct skiplist *uniq_holddown_nves) | |
65efcfce | 4389 | { |
d62a17ae | 4390 | afi_t afi; |
65efcfce | 4391 | |
1e20238a | 4392 | #ifdef DEBUG_L2_EXTRA |
d62a17ae | 4393 | { |
872ed4c7 | 4394 | char buf_pfx[PREFIX_STRLEN]; |
d62a17ae | 4395 | |
4396 | if (p) { | |
872ed4c7 | 4397 | prefix2str(p, buf_pfx, sizeof(buf_pfx)); |
d62a17ae | 4398 | } else { |
4399 | buf_pfx[0] = '*'; | |
4400 | buf_pfx[1] = 0; | |
4401 | } | |
4402 | ||
4403 | vnc_zlog_debug_verbose( | |
4404 | "%s: entry, p=%s, delete_active=%d, delete_holddown=%d", | |
4405 | __func__, buf_pfx, delete_active, delete_holddown); | |
4406 | } | |
65efcfce LB |
4407 | #endif |
4408 | ||
d62a17ae | 4409 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { |
4410 | ||
fe08ba7e DS |
4411 | struct agg_table *rt; |
4412 | struct agg_node *rn; | |
d62a17ae | 4413 | |
4414 | if (p && (family2afi(p->family) != afi)) { | |
4415 | continue; | |
4416 | } | |
4417 | ||
4418 | rt = it->imported_vpn[afi]; | |
4419 | if (!rt) | |
4420 | continue; | |
4421 | ||
4422 | vnc_zlog_debug_verbose("%s: scanning rt for afi=%d", __func__, | |
4423 | afi); | |
4424 | ||
fe08ba7e | 4425 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
40381db7 | 4426 | struct bgp_path_info *bpi; |
4b7e6066 | 4427 | struct bgp_path_info *next; |
26a3ffd6 | 4428 | const struct prefix *rn_p = agg_node_get_prefix(rn); |
d62a17ae | 4429 | |
2dbe669b DA |
4430 | if (p && VNC_DEBUG(IMPORT_DEL_REMOTE)) |
4431 | vnc_zlog_debug_any("%s: want %pFX, have %pRN", | |
4432 | __func__, p, rn); | |
d62a17ae | 4433 | |
26a3ffd6 | 4434 | if (p && prefix_cmp(p, rn_p)) |
d62a17ae | 4435 | continue; |
4436 | ||
26a3ffd6 | 4437 | vnc_zlog_debug_verbose("%s: rn pfx=%pRN", __func__, rn); |
d62a17ae | 4438 | |
4439 | /* TBD is this valid for afi == AFI_L2VPN? */ | |
4440 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, 1); | |
4441 | ||
40381db7 DS |
4442 | for (bpi = rn->info; bpi; bpi = next) { |
4443 | next = bpi->next; | |
d62a17ae | 4444 | |
4445 | struct prefix qpt; | |
4446 | struct prefix qct; | |
4447 | int qpt_valid = 0; | |
4448 | int qct_valid = 0; | |
4449 | int is_active = 0; | |
4450 | ||
40381db7 DS |
4451 | vnc_zlog_debug_verbose("%s: examining bpi %p", |
4452 | __func__, bpi); | |
d62a17ae | 4453 | |
05864da7 DS |
4454 | if (!rfapiGetNexthop(bpi->attr, &qpt)) |
4455 | qpt_valid = 1; | |
4456 | ||
d62a17ae | 4457 | if (vn) { |
4458 | if (!qpt_valid | |
4459 | || !prefix_match(vn, &qpt)) { | |
1e20238a | 4460 | #ifdef DEBUG_L2_EXTRA |
d62a17ae | 4461 | vnc_zlog_debug_verbose( |
4462 | "%s: continue at vn && !qpt_valid || !prefix_match(vn, &qpt)", | |
4463 | __func__); | |
65efcfce | 4464 | #endif |
d62a17ae | 4465 | continue; |
4466 | } | |
4467 | } | |
65efcfce | 4468 | |
40381db7 | 4469 | if (!rfapiGetUnAddrOfVpnBi(bpi, &qct)) |
d62a17ae | 4470 | qct_valid = 1; |
65efcfce | 4471 | |
d62a17ae | 4472 | if (un) { |
4473 | if (!qct_valid | |
4474 | || !prefix_match(un, &qct)) { | |
1e20238a | 4475 | #ifdef DEBUG_L2_EXTRA |
d62a17ae | 4476 | vnc_zlog_debug_verbose( |
4477 | "%s: continue at un && !qct_valid || !prefix_match(un, &qct)", | |
4478 | __func__); | |
65efcfce | 4479 | #endif |
d62a17ae | 4480 | continue; |
4481 | } | |
4482 | } | |
4483 | ||
4484 | ||
4485 | /* | |
40381db7 | 4486 | * Blow bpi away |
d62a17ae | 4487 | */ |
4488 | /* | |
4489 | * If this route is waiting to be deleted | |
4490 | * because of | |
4491 | * a previous withdraw, we must cancel its | |
4492 | * timer. | |
4493 | */ | |
40381db7 | 4494 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
d62a17ae | 4495 | if (!delete_holddown) |
4496 | continue; | |
40381db7 | 4497 | if (bpi->extra->vnc.import.timer) { |
d62a17ae | 4498 | |
b3d6bc6e MS |
4499 | struct thread **t = |
4500 | &(bpi->extra->vnc | |
4501 | .import.timer); | |
d62a17ae | 4502 | struct rfapi_withdraw *wcb = |
b3d6bc6e | 4503 | (*t)->arg; |
d62a17ae | 4504 | |
4505 | wcb->import_table | |
4506 | ->holddown_count[afi] -= | |
4507 | 1; | |
4508 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 4509 | bpi, wcb->import_table, |
d62a17ae | 4510 | afi, 1); |
4511 | XFREE(MTYPE_RFAPI_WITHDRAW, | |
4512 | wcb); | |
4513 | thread_cancel(t); | |
4514 | } | |
4515 | } else { | |
4516 | if (!delete_active) | |
4517 | continue; | |
4518 | is_active = 1; | |
4519 | } | |
4520 | ||
4521 | vnc_zlog_debug_verbose( | |
40381db7 DS |
4522 | "%s: deleting bpi %p (qct_valid=%d, qpt_valid=%d, delete_holddown=%d, delete_active=%d)", |
4523 | __func__, bpi, qct_valid, qpt_valid, | |
d62a17ae | 4524 | delete_holddown, delete_active); |
4525 | ||
4526 | ||
4527 | /* | |
4528 | * add nve to list | |
4529 | */ | |
4530 | if (qct_valid && qpt_valid) { | |
4531 | ||
4532 | struct rfapi_nve_addr na; | |
4533 | struct rfapi_nve_addr *nap; | |
4534 | ||
4535 | memset(&na, 0, sizeof(na)); | |
4536 | assert(!rfapiQprefix2Raddr(&qct, | |
4537 | &na.un)); | |
4538 | assert(!rfapiQprefix2Raddr(&qpt, | |
4539 | &na.vn)); | |
4540 | ||
4541 | if (skiplist_search( | |
4542 | (is_active | |
4543 | ? uniq_active_nves | |
4544 | : uniq_holddown_nves), | |
4545 | &na, (void **)&nap)) { | |
4546 | char line[BUFSIZ]; | |
4547 | ||
4548 | nap = XCALLOC( | |
4549 | MTYPE_RFAPI_NVE_ADDR, | |
4550 | sizeof(struct | |
4551 | rfapi_nve_addr)); | |
4552 | assert(nap); | |
4553 | *nap = na; | |
4554 | nap->info = is_active | |
4555 | ? pAHcount | |
4556 | : pHHcount; | |
4557 | skiplist_insert( | |
4558 | (is_active | |
4559 | ? uniq_active_nves | |
4560 | : uniq_holddown_nves), | |
4561 | nap, nap); | |
4562 | ||
4563 | rfapiNveAddr2Str(nap, line, | |
4564 | BUFSIZ); | |
4565 | } | |
4566 | } | |
4567 | ||
26a3ffd6 | 4568 | vnc_direct_bgp_rh_del_route(bgp, afi, rn_p, |
40381db7 | 4569 | bpi->peer); |
d62a17ae | 4570 | |
40381db7 | 4571 | RFAPI_UPDATE_ITABLE_COUNT(bpi, it, afi, -1); |
d62a17ae | 4572 | it->holddown_count[afi] += 1; |
40381db7 | 4573 | rfapiExpireVpnNow(it, rn, bpi, 1); |
d62a17ae | 4574 | |
4575 | vnc_zlog_debug_verbose( | |
4576 | "%s: incrementing count (is_active=%d)", | |
4577 | __func__, is_active); | |
4578 | ||
4579 | if (is_active) | |
4580 | ++*pARcount; | |
4581 | else | |
4582 | ++*pHRcount; | |
4583 | } | |
4584 | } | |
4585 | } | |
65efcfce LB |
4586 | } |
4587 | ||
4588 | ||
4589 | /* | |
4590 | * For use by the "clear vnc prefixes" command | |
4591 | */ | |
4592 | /*------------------------------------------ | |
4593 | * rfapiDeleteRemotePrefixes | |
4594 | * | |
4595 | * UI helper: For use by the "clear vnc prefixes" command | |
4596 | * | |
d62a17ae | 4597 | * input: |
65efcfce LB |
4598 | * un if set, tunnel must match this prefix |
4599 | * vn if set, nexthop prefix must match this prefix | |
4600 | * p if set, prefix must match this prefix | |
5ff06872 | 4601 | * it if set, only look in this import table |
65efcfce LB |
4602 | * |
4603 | * output | |
4604 | * pARcount number of active routes deleted | |
4605 | * pAHcount number of active nves deleted | |
4606 | * pHRcount number of holddown routes deleted | |
4607 | * pHHcount number of holddown nves deleted | |
4608 | * | |
4609 | * return value: | |
4610 | * void | |
4611 | --------------------------------------------*/ | |
d62a17ae | 4612 | void rfapiDeleteRemotePrefixes(struct prefix *un, struct prefix *vn, |
4613 | struct prefix *p, | |
4614 | struct rfapi_import_table *arg_it, | |
4615 | int delete_active, int delete_holddown, | |
4616 | uint32_t *pARcount, uint32_t *pAHcount, | |
4617 | uint32_t *pHRcount, uint32_t *pHHcount) | |
65efcfce | 4618 | { |
d62a17ae | 4619 | struct bgp *bgp; |
4620 | struct rfapi *h; | |
4621 | struct rfapi_import_table *it; | |
4622 | uint32_t deleted_holddown_route_count = 0; | |
4623 | uint32_t deleted_active_route_count = 0; | |
4624 | uint32_t deleted_holddown_nve_count = 0; | |
4625 | uint32_t deleted_active_nve_count = 0; | |
4626 | struct skiplist *uniq_holddown_nves; | |
4627 | struct skiplist *uniq_active_nves; | |
4628 | ||
4629 | VNC_ITRCCK; | |
4630 | ||
4631 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
4632 | /* If no bgp instantiated yet, no vnc prefixes exist */ | |
4633 | if (!bgp) | |
4634 | return; | |
4635 | ||
4636 | h = bgp->rfapi; | |
4637 | assert(h); | |
4638 | ||
4639 | uniq_holddown_nves = | |
4640 | skiplist_new(0, rfapi_nve_addr_cmp, delete_rem_pfx_na_free); | |
4641 | uniq_active_nves = | |
4642 | skiplist_new(0, rfapi_nve_addr_cmp, delete_rem_pfx_na_free); | |
4643 | ||
4644 | /* | |
4645 | * Iterate over all import tables; do a filtered import | |
4646 | * for the afi/safi combination | |
4647 | */ | |
4648 | ||
4649 | if (arg_it) | |
4650 | it = arg_it; | |
4651 | else | |
4652 | it = h->imports; | |
4653 | for (; it;) { | |
4654 | ||
4655 | vnc_zlog_debug_verbose( | |
4656 | "%s: calling rfapiDeleteRemotePrefixesIt() on (IP) import %p", | |
4657 | __func__, it); | |
4658 | ||
4659 | rfapiDeleteRemotePrefixesIt( | |
4660 | bgp, it, un, vn, p, delete_active, delete_holddown, | |
4661 | &deleted_active_route_count, &deleted_active_nve_count, | |
4662 | &deleted_holddown_route_count, | |
4663 | &deleted_holddown_nve_count, uniq_active_nves, | |
4664 | uniq_holddown_nves); | |
4665 | ||
4666 | if (arg_it) | |
4667 | it = NULL; | |
4668 | else | |
4669 | it = it->next; | |
4670 | } | |
4671 | ||
4672 | /* | |
4673 | * Now iterate over L2 import tables | |
4674 | */ | |
4675 | if (h->import_mac && !(p && (p->family != AF_ETHERNET))) { | |
4676 | ||
4677 | void *cursor = NULL; | |
4678 | int rc; | |
4679 | ||
9d303b37 DL |
4680 | for (cursor = NULL, |
4681 | rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4682 | &cursor); | |
d62a17ae | 4683 | !rc; rc = skiplist_next(h->import_mac, NULL, (void **)&it, |
4684 | &cursor)) { | |
4685 | ||
4686 | vnc_zlog_debug_verbose( | |
4687 | "%s: calling rfapiDeleteRemotePrefixesIt() on import_mac %p", | |
4688 | __func__, it); | |
4689 | ||
4690 | rfapiDeleteRemotePrefixesIt( | |
4691 | bgp, it, un, vn, p, delete_active, | |
4692 | delete_holddown, &deleted_active_route_count, | |
4693 | &deleted_active_nve_count, | |
4694 | &deleted_holddown_route_count, | |
4695 | &deleted_holddown_nve_count, uniq_active_nves, | |
4696 | uniq_holddown_nves); | |
4697 | } | |
4698 | } | |
4699 | ||
4700 | /* | |
4701 | * our custom element freeing function above counts as it deletes | |
4702 | */ | |
4703 | skiplist_free(uniq_holddown_nves); | |
4704 | skiplist_free(uniq_active_nves); | |
4705 | ||
4706 | if (pARcount) | |
4707 | *pARcount = deleted_active_route_count; | |
4708 | if (pAHcount) | |
4709 | *pAHcount = deleted_active_nve_count; | |
4710 | if (pHRcount) | |
4711 | *pHRcount = deleted_holddown_route_count; | |
4712 | if (pHHcount) | |
4713 | *pHHcount = deleted_holddown_nve_count; | |
4714 | ||
4715 | VNC_ITRCCK; | |
65efcfce LB |
4716 | } |
4717 | ||
4718 | /*------------------------------------------ | |
4719 | * rfapiCountRemoteRoutes | |
4720 | * | |
4721 | * UI helper: count VRF routes from BGP side | |
4722 | * | |
d62a17ae | 4723 | * input: |
65efcfce LB |
4724 | * |
4725 | * output | |
4726 | * pALRcount count of active local routes | |
4727 | * pARRcount count of active remote routes | |
4728 | * pHRcount count of holddown routes | |
4729 | * pIRcount count of direct imported routes | |
4730 | * | |
4731 | * return value: | |
4732 | * void | |
4733 | --------------------------------------------*/ | |
d62a17ae | 4734 | void rfapiCountAllItRoutes(int *pALRcount, /* active local routes */ |
4735 | int *pARRcount, /* active remote routes */ | |
4736 | int *pHRcount, /* holddown routes */ | |
4737 | int *pIRcount) /* imported routes */ | |
65efcfce | 4738 | { |
d62a17ae | 4739 | struct bgp *bgp; |
4740 | struct rfapi *h; | |
4741 | struct rfapi_import_table *it; | |
4742 | afi_t afi; | |
4743 | ||
4744 | int total_active_local = 0; | |
4745 | int total_active_remote = 0; | |
4746 | int total_holddown = 0; | |
4747 | int total_imported = 0; | |
4748 | ||
4749 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
4750 | assert(bgp); | |
4751 | ||
4752 | h = bgp->rfapi; | |
4753 | assert(h); | |
4754 | ||
4755 | /* | |
4756 | * Iterate over all import tables; do a filtered import | |
4757 | * for the afi/safi combination | |
4758 | */ | |
4759 | ||
4760 | for (it = h->imports; it; it = it->next) { | |
4761 | ||
4762 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
4763 | ||
4764 | total_active_local += it->local_count[afi]; | |
4765 | total_active_remote += it->remote_count[afi]; | |
4766 | total_holddown += it->holddown_count[afi]; | |
4767 | total_imported += it->imported_count[afi]; | |
4768 | } | |
4769 | } | |
4770 | ||
4771 | void *cursor; | |
4772 | int rc; | |
4773 | ||
4774 | if (h->import_mac) { | |
9d303b37 DL |
4775 | for (cursor = NULL, |
4776 | rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4777 | &cursor); | |
d62a17ae | 4778 | !rc; rc = skiplist_next(h->import_mac, NULL, (void **)&it, |
4779 | &cursor)) { | |
4780 | ||
4781 | total_active_local += it->local_count[AFI_L2VPN]; | |
4782 | total_active_remote += it->remote_count[AFI_L2VPN]; | |
4783 | total_holddown += it->holddown_count[AFI_L2VPN]; | |
4784 | total_imported += it->imported_count[AFI_L2VPN]; | |
4785 | } | |
4786 | } | |
4787 | ||
4788 | ||
4789 | if (pALRcount) { | |
4790 | *pALRcount = total_active_local; | |
4791 | } | |
4792 | if (pARRcount) { | |
4793 | *pARRcount = total_active_remote; | |
4794 | } | |
4795 | if (pHRcount) { | |
4796 | *pHRcount = total_holddown; | |
4797 | } | |
4798 | if (pIRcount) { | |
4799 | *pIRcount = total_imported; | |
4800 | } | |
65efcfce LB |
4801 | } |
4802 | ||
4803 | /*------------------------------------------ | |
4804 | * rfapiGetHolddownFromLifetime | |
4805 | * | |
4806 | * calculate holddown value based on lifetime | |
4807 | * | |
d62a17ae | 4808 | * input: |
65efcfce LB |
4809 | * lifetime lifetime |
4810 | * | |
4811 | * return value: | |
4812 | * Holddown value based on lifetime, holddown_factor, | |
4813 | * and RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY | |
4814 | * | |
4815 | --------------------------------------------*/ | |
4816 | /* hold down time maxes out at RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY */ | |
d62a17ae | 4817 | uint32_t rfapiGetHolddownFromLifetime(uint32_t lifetime) |
65efcfce | 4818 | { |
d62a17ae | 4819 | uint32_t factor; |
4820 | struct bgp *bgp; | |
4821 | ||
4822 | bgp = bgp_get_default(); | |
4823 | if (bgp && bgp->rfapi_cfg) | |
4824 | factor = bgp->rfapi_cfg->rfp_cfg.holddown_factor; | |
4825 | else | |
4826 | factor = RFAPI_RFP_CFG_DEFAULT_HOLDDOWN_FACTOR; | |
4827 | ||
4828 | if (factor < 100 || lifetime < RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY) | |
4829 | lifetime = lifetime * factor / 100; | |
4830 | if (lifetime < RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY) | |
4831 | return lifetime; | |
4832 | else | |
4833 | return RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY; | |
65efcfce | 4834 | } |