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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 | ||
203 | #if DEBUG_ROUTE_COUNTERS | |
204 | #define VNC_ITRCCK do {rfapiCheckRouteCount();} while (0) | |
205 | #else | |
206 | #define VNC_ITRCCK | |
207 | #endif | |
208 | ||
209 | /* | |
210 | * Validate reference count for a node in an import table | |
211 | * | |
212 | * Normally lockoffset is 0 for nodes in quiescent state. However, | |
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 | ||
40381db7 | 268 | if (count_bpi + count_monitor + lockoffset != rn->lock) { |
d62a17ae | 269 | vnc_zlog_debug_verbose( |
40381db7 DS |
270 | "%s: count_bpi=%d, count_monitor=%d, lockoffset=%d, rn->lock=%d", |
271 | __func__, count_bpi, count_monitor, lockoffset, | |
d62a17ae | 272 | rn->lock); |
273 | assert(0); | |
274 | } | |
65efcfce LB |
275 | } |
276 | ||
277 | /* | |
278 | * Perform deferred rfapi_close operations that were queued | |
279 | * during callbacks. | |
280 | */ | |
d62a17ae | 281 | static wq_item_status rfapi_deferred_close_workfunc(struct work_queue *q, |
282 | void *data) | |
65efcfce | 283 | { |
d62a17ae | 284 | struct rfapi_descriptor *rfd = data; |
285 | struct rfapi *h = q->spec.data; | |
286 | ||
287 | assert(!(h->flags & RFAPI_INCALLBACK)); | |
288 | rfapi_close(rfd); | |
289 | vnc_zlog_debug_verbose("%s: completed deferred close on handle %p", | |
290 | __func__, rfd); | |
291 | return WQ_SUCCESS; | |
65efcfce LB |
292 | } |
293 | ||
294 | /* | |
295 | * Extract layer 2 option from Encap TLVS in BGP attrs | |
296 | */ | |
d62a17ae | 297 | int rfapiGetL2o(struct attr *attr, struct rfapi_l2address_option *l2o) |
65efcfce | 298 | { |
d62a17ae | 299 | if (attr) { |
300 | ||
301 | struct bgp_attr_encap_subtlv *pEncap; | |
302 | ||
303 | for (pEncap = attr->vnc_subtlvs; pEncap; | |
304 | pEncap = pEncap->next) { | |
305 | ||
306 | if (pEncap->type == BGP_VNC_SUBTLV_TYPE_RFPOPTION) { | |
307 | if (pEncap->value[0] | |
308 | == RFAPI_VN_OPTION_TYPE_L2ADDR) { | |
309 | ||
310 | if (pEncap->value[1] == 14) { | |
311 | memcpy(l2o->macaddr.octet, | |
312 | pEncap->value + 2, | |
28328ea9 | 313 | ETH_ALEN); |
d62a17ae | 314 | l2o->label = |
315 | ((pEncap->value[10] | |
316 | >> 4) | |
317 | & 0x0f) | |
318 | + ((pEncap->value[9] | |
319 | << 4) | |
320 | & 0xff0) | |
321 | + ((pEncap->value[8] | |
322 | << 12) | |
323 | & 0xff000); | |
324 | ||
325 | l2o->local_nve_id = | |
326 | pEncap->value[12]; | |
327 | ||
328 | l2o->logical_net_id = | |
329 | (pEncap->value[15] | |
330 | & 0xff) | |
331 | + ((pEncap->value[14] | |
332 | << 8) | |
333 | & 0xff00) | |
334 | + ((pEncap->value[13] | |
335 | << 16) | |
336 | & 0xff0000); | |
337 | } | |
338 | ||
339 | return 0; | |
340 | } | |
341 | } | |
342 | } | |
343 | } | |
344 | ||
345 | return ENOENT; | |
65efcfce LB |
346 | } |
347 | ||
348 | /* | |
349 | * Extract the lifetime from the Tunnel Encap attribute of a route in | |
350 | * an import table | |
351 | */ | |
d62a17ae | 352 | int rfapiGetVncLifetime(struct attr *attr, uint32_t *lifetime) |
65efcfce | 353 | { |
d62a17ae | 354 | struct bgp_attr_encap_subtlv *pEncap; |
65efcfce | 355 | |
d62a17ae | 356 | *lifetime = RFAPI_INFINITE_LIFETIME; /* default to infinite */ |
65efcfce | 357 | |
d62a17ae | 358 | if (attr) { |
65efcfce | 359 | |
d62a17ae | 360 | for (pEncap = attr->vnc_subtlvs; pEncap; |
361 | pEncap = pEncap->next) { | |
65efcfce | 362 | |
d62a17ae | 363 | if (pEncap->type |
364 | == BGP_VNC_SUBTLV_TYPE_LIFETIME) { /* lifetime */ | |
365 | if (pEncap->length == 4) { | |
366 | memcpy(lifetime, pEncap->value, 4); | |
367 | *lifetime = ntohl(*lifetime); | |
368 | return 0; | |
369 | } | |
370 | } | |
371 | } | |
372 | } | |
65efcfce | 373 | |
d62a17ae | 374 | return ENOENT; |
65efcfce LB |
375 | } |
376 | ||
65efcfce LB |
377 | /* |
378 | * Look for UN address in Encap attribute | |
379 | */ | |
d62a17ae | 380 | int rfapiGetVncTunnelUnAddr(struct attr *attr, struct prefix *p) |
65efcfce | 381 | { |
d62a17ae | 382 | struct bgp_attr_encap_subtlv *pEncap; |
f4bd90c5 | 383 | bgp_encap_types tun_type = BGP_ENCAP_TYPE_MPLS;/*Default tunnel type*/ |
d62a17ae | 384 | |
f4bd90c5 | 385 | bgp_attr_extcom_tunnel_type(attr, &tun_type); |
d62a17ae | 386 | if (tun_type == BGP_ENCAP_TYPE_MPLS) { |
387 | if (!p) | |
388 | return 0; | |
389 | /* MPLS carries UN address in next hop */ | |
390 | rfapiNexthop2Prefix(attr, p); | |
391 | if (p->family != 0) | |
392 | return 0; | |
393 | ||
394 | return ENOENT; | |
395 | } | |
396 | if (attr) { | |
397 | for (pEncap = attr->encap_subtlvs; pEncap; | |
398 | pEncap = pEncap->next) { | |
399 | ||
400 | if (pEncap->type | |
401 | == BGP_ENCAP_SUBTLV_TYPE_REMOTE_ENDPOINT) { /* un | |
402 | addr | |
403 | */ | |
404 | switch (pEncap->length) { | |
405 | case 8: | |
406 | if (p) { | |
407 | p->family = AF_INET; | |
408 | p->prefixlen = 32; | |
409 | memcpy(p->u.val, pEncap->value, | |
410 | 4); | |
411 | } | |
412 | return 0; | |
413 | ||
414 | case 20: | |
415 | if (p) { | |
416 | p->family = AF_INET6; | |
417 | p->prefixlen = 128; | |
418 | memcpy(p->u.val, pEncap->value, | |
419 | 16); | |
420 | } | |
421 | return 0; | |
422 | } | |
423 | } | |
424 | } | |
425 | } | |
426 | ||
427 | return ENOENT; | |
65efcfce LB |
428 | } |
429 | ||
430 | /* | |
431 | * Get UN address wherever it might be | |
432 | */ | |
40381db7 | 433 | int rfapiGetUnAddrOfVpnBi(struct bgp_path_info *bpi, struct prefix *p) |
65efcfce | 434 | { |
d62a17ae | 435 | /* If it's in this route's VNC attribute, we're done */ |
40381db7 | 436 | if (!rfapiGetVncTunnelUnAddr(bpi->attr, p)) |
d62a17ae | 437 | return 0; |
438 | /* | |
439 | * Otherwise, see if it's cached from a corresponding ENCAP SAFI | |
440 | * advertisement | |
441 | */ | |
40381db7 DS |
442 | if (bpi->extra) { |
443 | switch (bpi->extra->vnc.import.un_family) { | |
d62a17ae | 444 | case AF_INET: |
445 | if (p) { | |
40381db7 DS |
446 | p->family = bpi->extra->vnc.import.un_family; |
447 | p->u.prefix4 = bpi->extra->vnc.import.un.addr4; | |
d62a17ae | 448 | p->prefixlen = 32; |
449 | } | |
450 | return 0; | |
451 | case AF_INET6: | |
452 | if (p) { | |
40381db7 DS |
453 | p->family = bpi->extra->vnc.import.un_family; |
454 | p->u.prefix6 = bpi->extra->vnc.import.un.addr6; | |
d62a17ae | 455 | p->prefixlen = 128; |
456 | } | |
457 | return 0; | |
458 | default: | |
459 | if (p) | |
460 | p->family = 0; | |
65efcfce | 461 | #if DEBUG_ENCAP_MONITOR |
d62a17ae | 462 | vnc_zlog_debug_verbose( |
40381db7 | 463 | "%s: bpi->extra->vnc.import.un_family is 0, no UN addr", |
d62a17ae | 464 | __func__); |
65efcfce | 465 | #endif |
d62a17ae | 466 | break; |
467 | } | |
468 | } | |
65efcfce | 469 | |
d62a17ae | 470 | return ENOENT; |
65efcfce LB |
471 | } |
472 | ||
473 | ||
474 | /* | |
9b6d8fcf | 475 | * Make a new bgp_path_info from gathered parameters |
65efcfce | 476 | */ |
4b7e6066 DS |
477 | static struct bgp_path_info *rfapiBgpInfoCreate(struct attr *attr, |
478 | struct peer *peer, void *rfd, | |
479 | struct prefix_rd *prd, | |
480 | uint8_t type, uint8_t sub_type, | |
481 | uint32_t *label) | |
65efcfce | 482 | { |
4b7e6066 | 483 | struct bgp_path_info *new; |
d62a17ae | 484 | |
9591da26 DS |
485 | new = info_make(type, sub_type, 0, peer, attr, NULL); |
486 | ||
05864da7 | 487 | new->attr = bgp_attr_intern(attr); |
d62a17ae | 488 | |
18ee8310 | 489 | bgp_path_info_extra_get(new); |
d62a17ae | 490 | if (prd) { |
491 | new->extra->vnc.import.rd = *prd; | |
492 | rfapi_time(&new->extra->vnc.import.create_time); | |
493 | } | |
494 | if (label) | |
317f1fe0 | 495 | encode_label(*label, &new->extra->label[0]); |
9591da26 | 496 | |
d62a17ae | 497 | peer_lock(peer); |
498 | ||
499 | return new; | |
65efcfce LB |
500 | } |
501 | ||
502 | /* | |
9b6d8fcf | 503 | * Frees bgp_path_info as used in import tables (parts are not |
65efcfce LB |
504 | * allocated exactly the way they are in the main RIBs) |
505 | */ | |
4b7e6066 | 506 | static void rfapiBgpInfoFree(struct bgp_path_info *goner) |
65efcfce | 507 | { |
d62a17ae | 508 | if (!goner) |
509 | return; | |
510 | ||
511 | if (goner->peer) { | |
512 | vnc_zlog_debug_verbose("%s: calling peer_unlock(%p), #%d", | |
513 | __func__, goner->peer, | |
514 | goner->peer->lock); | |
515 | peer_unlock(goner->peer); | |
516 | } | |
517 | ||
05864da7 DS |
518 | bgp_attr_unintern(&goner->attr); |
519 | ||
a2e219fe PG |
520 | if (goner->extra) |
521 | bgp_path_info_extra_free(&goner->extra); | |
d62a17ae | 522 | XFREE(MTYPE_BGP_ROUTE, goner); |
65efcfce LB |
523 | } |
524 | ||
d62a17ae | 525 | struct rfapi_import_table *rfapiMacImportTableGetNoAlloc(struct bgp *bgp, |
526 | uint32_t lni) | |
65efcfce | 527 | { |
d62a17ae | 528 | struct rfapi *h; |
529 | struct rfapi_import_table *it = NULL; | |
530 | uintptr_t lni_as_ptr = lni; | |
65efcfce | 531 | |
d62a17ae | 532 | h = bgp->rfapi; |
533 | if (!h) | |
534 | return NULL; | |
65efcfce | 535 | |
d62a17ae | 536 | if (!h->import_mac) |
537 | return NULL; | |
65efcfce | 538 | |
d62a17ae | 539 | if (skiplist_search(h->import_mac, (void *)lni_as_ptr, (void **)&it)) |
540 | return NULL; | |
65efcfce | 541 | |
d62a17ae | 542 | return it; |
65efcfce LB |
543 | } |
544 | ||
d62a17ae | 545 | struct rfapi_import_table *rfapiMacImportTableGet(struct bgp *bgp, uint32_t lni) |
65efcfce | 546 | { |
d62a17ae | 547 | struct rfapi *h; |
548 | struct rfapi_import_table *it = NULL; | |
549 | uintptr_t lni_as_ptr = lni; | |
550 | ||
551 | h = bgp->rfapi; | |
552 | assert(h); | |
553 | ||
554 | if (!h->import_mac) { | |
555 | /* default cmp is good enough for LNI */ | |
556 | h->import_mac = skiplist_new(0, NULL, NULL); | |
557 | } | |
558 | ||
559 | if (skiplist_search(h->import_mac, (void *)lni_as_ptr, (void **)&it)) { | |
560 | ||
561 | struct ecommunity *enew; | |
562 | struct ecommunity_val eval; | |
563 | afi_t afi; | |
564 | ||
565 | it = XCALLOC(MTYPE_RFAPI_IMPORTTABLE, | |
566 | sizeof(struct rfapi_import_table)); | |
567 | /* set RT list of new import table based on LNI */ | |
568 | memset((char *)&eval, 0, sizeof(eval)); | |
569 | eval.val[0] = 0; /* VNC L2VPN */ | |
570 | eval.val[1] = 2; /* VNC L2VPN */ | |
571 | eval.val[5] = (lni >> 16) & 0xff; | |
572 | eval.val[6] = (lni >> 8) & 0xff; | |
573 | eval.val[7] = (lni >> 0) & 0xff; | |
574 | ||
575 | enew = ecommunity_new(); | |
576 | ecommunity_add_val(enew, &eval); | |
577 | it->rt_import_list = enew; | |
578 | ||
579 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
fe08ba7e DS |
580 | it->imported_vpn[afi] = agg_table_init(); |
581 | it->imported_encap[afi] = agg_table_init(); | |
d62a17ae | 582 | } |
583 | ||
584 | it->l2_logical_net_id = lni; | |
585 | ||
586 | skiplist_insert(h->import_mac, (void *)lni_as_ptr, it); | |
587 | } | |
588 | ||
589 | assert(it); | |
590 | return it; | |
65efcfce LB |
591 | } |
592 | ||
593 | /* | |
594 | * Implement MONITOR_MOVE_SHORTER(original_node) from | |
595 | * RFAPI-Import-Event-Handling.txt | |
d62a17ae | 596 | * |
65efcfce LB |
597 | * Returns pointer to the list of moved monitors |
598 | */ | |
599 | static struct rfapi_monitor_vpn * | |
fe08ba7e | 600 | rfapiMonitorMoveShorter(struct agg_node *original_vpn_node, int lockoffset) |
65efcfce | 601 | { |
40381db7 | 602 | struct bgp_path_info *bpi; |
fe08ba7e | 603 | struct agg_node *par; |
d62a17ae | 604 | struct rfapi_monitor_vpn *m; |
605 | struct rfapi_monitor_vpn *mlast; | |
606 | struct rfapi_monitor_vpn *moved; | |
607 | int movecount = 0; | |
608 | int parent_already_refcounted = 0; | |
65efcfce | 609 | |
d62a17ae | 610 | RFAPI_CHECK_REFCOUNT(original_vpn_node, SAFI_MPLS_VPN, lockoffset); |
65efcfce LB |
611 | |
612 | #if DEBUG_MONITOR_MOVE_SHORTER | |
d62a17ae | 613 | { |
872ed4c7 | 614 | char buf[PREFIX_STRLEN]; |
65efcfce | 615 | |
872ed4c7 | 616 | prefix2str(&original_vpn_node->p, buf, sizeof(buf)); |
d62a17ae | 617 | vnc_zlog_debug_verbose("%s: called with node pfx=%s", __func__, |
618 | buf); | |
619 | } | |
65efcfce LB |
620 | #endif |
621 | ||
d62a17ae | 622 | /* |
40381db7 | 623 | * 1. If there is at least one bpi (either regular route or |
d62a17ae | 624 | * route marked as withdrawn, with a pending timer) at |
625 | * original_node with a valid UN address, we're done. Return. | |
626 | */ | |
40381db7 | 627 | for (bpi = original_vpn_node->info; bpi; bpi = bpi->next) { |
d62a17ae | 628 | struct prefix pfx; |
629 | ||
40381db7 | 630 | if (!rfapiGetUnAddrOfVpnBi(bpi, &pfx)) { |
65efcfce | 631 | #if DEBUG_MONITOR_MOVE_SHORTER |
d62a17ae | 632 | vnc_zlog_debug_verbose( |
633 | "%s: have valid UN at original node, no change", | |
634 | __func__); | |
65efcfce | 635 | #endif |
d62a17ae | 636 | return NULL; |
637 | } | |
638 | } | |
639 | ||
640 | /* | |
641 | * 2. Travel up the tree (toward less-specific prefixes) from | |
642 | * original_node to find the first node that has at least | |
643 | * one route (even if it is only a withdrawn route) with a | |
644 | * valid UN address. Call this node "Node P." | |
645 | */ | |
fe08ba7e DS |
646 | for (par = agg_node_parent(original_vpn_node); par; |
647 | par = agg_node_parent(par)) { | |
40381db7 | 648 | for (bpi = par->info; bpi; bpi = bpi->next) { |
d62a17ae | 649 | struct prefix pfx; |
40381db7 | 650 | if (!rfapiGetUnAddrOfVpnBi(bpi, &pfx)) { |
d62a17ae | 651 | break; |
652 | } | |
653 | } | |
40381db7 | 654 | if (bpi) |
d62a17ae | 655 | break; |
656 | } | |
657 | ||
658 | if (par) { | |
659 | RFAPI_CHECK_REFCOUNT(par, SAFI_MPLS_VPN, 0); | |
660 | } | |
661 | ||
662 | /* | |
663 | * If no less-specific routes, try to use the 0/0 node | |
664 | */ | |
665 | if (!par) { | |
666 | /* this isn't necessarily 0/0 */ | |
fe08ba7e | 667 | par = agg_route_table_top(original_vpn_node); |
d62a17ae | 668 | |
669 | /* | |
670 | * If we got the top node but it wasn't 0/0, | |
671 | * ignore it | |
672 | */ | |
673 | if (par && par->p.prefixlen) { | |
fe08ba7e | 674 | agg_unlock_node(par); /* maybe free */ |
d62a17ae | 675 | par = NULL; |
676 | } | |
677 | ||
678 | if (par) { | |
679 | ++parent_already_refcounted; | |
680 | } | |
681 | } | |
682 | ||
683 | /* | |
684 | * Create 0/0 node if it isn't there | |
685 | */ | |
686 | if (!par) { | |
687 | struct prefix pfx_default; | |
688 | ||
689 | memset(&pfx_default, 0, sizeof(pfx_default)); | |
690 | pfx_default.family = original_vpn_node->p.family; | |
691 | ||
692 | /* creates default node if none exists */ | |
fe08ba7e DS |
693 | par = agg_node_get(agg_get_table(original_vpn_node), |
694 | &pfx_default); | |
d62a17ae | 695 | ++parent_already_refcounted; |
696 | } | |
697 | ||
698 | /* | |
699 | * 3. Move each of the monitors found at original_node to Node P. | |
700 | * These are "Moved Monitors." | |
701 | * | |
702 | */ | |
703 | ||
704 | /* | |
705 | * Attach at end so that the list pointer we return points | |
706 | * only to the moved routes | |
707 | */ | |
708 | for (m = RFAPI_MONITOR_VPN(par), mlast = NULL; m; | |
709 | mlast = m, m = m->next) | |
710 | ; | |
711 | ||
712 | if (mlast) { | |
713 | moved = mlast->next = RFAPI_MONITOR_VPN(original_vpn_node); | |
714 | } else { | |
715 | moved = RFAPI_MONITOR_VPN_W_ALLOC(par) = | |
716 | RFAPI_MONITOR_VPN(original_vpn_node); | |
717 | } | |
718 | if (RFAPI_MONITOR_VPN( | |
719 | original_vpn_node)) /* check agg, so not allocated */ | |
720 | RFAPI_MONITOR_VPN_W_ALLOC(original_vpn_node) = NULL; | |
721 | ||
722 | /* | |
723 | * update the node pointers on the monitors | |
724 | */ | |
725 | for (m = moved; m; m = m->next) { | |
726 | ++movecount; | |
727 | m->node = par; | |
728 | } | |
729 | ||
730 | RFAPI_CHECK_REFCOUNT(par, SAFI_MPLS_VPN, | |
731 | parent_already_refcounted - movecount); | |
732 | while (movecount > parent_already_refcounted) { | |
fe08ba7e | 733 | agg_lock_node(par); |
d62a17ae | 734 | ++parent_already_refcounted; |
735 | } | |
736 | while (movecount < parent_already_refcounted) { | |
737 | /* unlikely, but code defensively */ | |
fe08ba7e | 738 | agg_unlock_node(par); |
d62a17ae | 739 | --parent_already_refcounted; |
740 | } | |
741 | RFAPI_CHECK_REFCOUNT(original_vpn_node, SAFI_MPLS_VPN, | |
742 | movecount + lockoffset); | |
743 | while (movecount--) { | |
fe08ba7e | 744 | agg_unlock_node(original_vpn_node); |
d62a17ae | 745 | } |
65efcfce LB |
746 | |
747 | #if DEBUG_MONITOR_MOVE_SHORTER | |
d62a17ae | 748 | { |
872ed4c7 | 749 | char buf[PREFIX_STRLEN]; |
65efcfce | 750 | |
872ed4c7 | 751 | prefix2str(&par->p, buf, sizeof(buf)); |
d62a17ae | 752 | vnc_zlog_debug_verbose("%s: moved to node pfx=%s", __func__, |
753 | buf); | |
754 | } | |
65efcfce LB |
755 | #endif |
756 | ||
757 | ||
d62a17ae | 758 | return moved; |
65efcfce LB |
759 | } |
760 | ||
761 | /* | |
762 | * Implement MONITOR_MOVE_LONGER(new_node) from | |
763 | * RFAPI-Import-Event-Handling.txt | |
764 | */ | |
fe08ba7e | 765 | static void rfapiMonitorMoveLonger(struct agg_node *new_vpn_node) |
65efcfce | 766 | { |
d62a17ae | 767 | struct rfapi_monitor_vpn *monitor; |
768 | struct rfapi_monitor_vpn *mlast; | |
40381db7 | 769 | struct bgp_path_info *bpi; |
fe08ba7e | 770 | struct agg_node *par; |
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;) { | |
811 | ||
812 | /* | |
813 | * If new longest match for monitor prefix is the new | |
814 | * route's prefix, move monitor to new route's prefix | |
815 | */ | |
816 | if (prefix_match(&new_vpn_node->p, &monitor->p)) { | |
817 | /* detach */ | |
818 | if (mlast) { | |
819 | mlast->next = monitor->next; | |
820 | } else { | |
821 | RFAPI_MONITOR_VPN_W_ALLOC(par) = monitor->next; | |
822 | } | |
823 | ||
824 | ||
825 | /* attach */ | |
826 | monitor->next = RFAPI_MONITOR_VPN(new_vpn_node); | |
827 | RFAPI_MONITOR_VPN_W_ALLOC(new_vpn_node) = monitor; | |
828 | monitor->node = new_vpn_node; | |
829 | ||
fe08ba7e | 830 | agg_lock_node(new_vpn_node); /* incr refcount */ |
d62a17ae | 831 | |
832 | monitor = mlast ? mlast->next : RFAPI_MONITOR_VPN(par); | |
833 | ||
834 | RFAPI_CHECK_REFCOUNT(par, SAFI_MPLS_VPN, 1); | |
835 | /* decr refcount after we're done with par as this might | |
836 | * free it */ | |
fe08ba7e | 837 | agg_unlock_node(par); |
d62a17ae | 838 | |
839 | continue; | |
840 | } | |
841 | mlast = monitor; | |
842 | monitor = monitor->next; | |
843 | } | |
844 | ||
845 | RFAPI_CHECK_REFCOUNT(new_vpn_node, SAFI_MPLS_VPN, 0); | |
65efcfce LB |
846 | } |
847 | ||
848 | ||
40381db7 | 849 | static void rfapiBgpInfoChainFree(struct bgp_path_info *bpi) |
65efcfce | 850 | { |
4b7e6066 | 851 | struct bgp_path_info *next; |
d62a17ae | 852 | |
40381db7 | 853 | while (bpi) { |
d62a17ae | 854 | |
855 | /* | |
40381db7 | 856 | * If there is a timer waiting to delete this bpi, cancel |
d62a17ae | 857 | * the timer and delete immediately |
858 | */ | |
40381db7 DS |
859 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
860 | && bpi->extra->vnc.import.timer) { | |
d62a17ae | 861 | |
862 | struct thread *t = | |
40381db7 | 863 | (struct thread *)bpi->extra->vnc.import.timer; |
d62a17ae | 864 | struct rfapi_withdraw *wcb = t->arg; |
865 | ||
866 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
867 | thread_cancel(t); | |
868 | } | |
869 | ||
40381db7 DS |
870 | next = bpi->next; |
871 | bpi->next = NULL; | |
872 | rfapiBgpInfoFree(bpi); | |
873 | bpi = next; | |
d62a17ae | 874 | } |
65efcfce LB |
875 | } |
876 | ||
d62a17ae | 877 | static void rfapiImportTableFlush(struct rfapi_import_table *it) |
65efcfce | 878 | { |
d62a17ae | 879 | afi_t afi; |
880 | ||
881 | /* | |
882 | * Free ecommunity | |
883 | */ | |
884 | ecommunity_free(&it->rt_import_list); | |
885 | it->rt_import_list = NULL; | |
886 | ||
887 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
888 | ||
fe08ba7e | 889 | struct agg_node *rn; |
d62a17ae | 890 | |
fe08ba7e DS |
891 | for (rn = agg_route_top(it->imported_vpn[afi]); rn; |
892 | rn = agg_route_next(rn)) { | |
d62a17ae | 893 | /* |
894 | * Each route_node has: | |
895 | * aggregate: points to rfapi_it_extra with monitor | |
896 | * chain(s) | |
9b6d8fcf | 897 | * info: points to chain of bgp_path_info |
d62a17ae | 898 | */ |
9b6d8fcf | 899 | /* free bgp_path_info and its children */ |
d62a17ae | 900 | rfapiBgpInfoChainFree(rn->info); |
901 | rn->info = NULL; | |
902 | ||
903 | rfapiMonitorExtraFlush(SAFI_MPLS_VPN, rn); | |
904 | } | |
905 | ||
fe08ba7e DS |
906 | for (rn = agg_route_top(it->imported_encap[afi]); rn; |
907 | rn = agg_route_next(rn)) { | |
9b6d8fcf | 908 | /* free bgp_path_info and its children */ |
d62a17ae | 909 | rfapiBgpInfoChainFree(rn->info); |
910 | rn->info = NULL; | |
911 | ||
912 | rfapiMonitorExtraFlush(SAFI_ENCAP, rn); | |
913 | } | |
914 | ||
fe08ba7e DS |
915 | agg_table_finish(it->imported_vpn[afi]); |
916 | agg_table_finish(it->imported_encap[afi]); | |
d62a17ae | 917 | } |
918 | if (it->monitor_exterior_orphans) { | |
919 | skiplist_free(it->monitor_exterior_orphans); | |
920 | } | |
65efcfce LB |
921 | } |
922 | ||
d62a17ae | 923 | void rfapiImportTableRefDelByIt(struct bgp *bgp, |
924 | struct rfapi_import_table *it_target) | |
65efcfce | 925 | { |
d62a17ae | 926 | struct rfapi *h; |
927 | struct rfapi_import_table *it; | |
928 | struct rfapi_import_table *prev = NULL; | |
929 | ||
930 | assert(it_target); | |
931 | ||
932 | h = bgp->rfapi; | |
933 | assert(h); | |
934 | ||
935 | for (it = h->imports; it; prev = it, it = it->next) { | |
936 | if (it == it_target) | |
937 | break; | |
938 | } | |
939 | ||
940 | assert(it); | |
941 | assert(it->refcount); | |
942 | ||
943 | it->refcount -= 1; | |
944 | ||
945 | if (!it->refcount) { | |
946 | if (prev) { | |
947 | prev->next = it->next; | |
948 | } else { | |
949 | h->imports = it->next; | |
950 | } | |
951 | rfapiImportTableFlush(it); | |
952 | XFREE(MTYPE_RFAPI_IMPORTTABLE, it); | |
953 | } | |
65efcfce LB |
954 | } |
955 | ||
956 | #if RFAPI_REQUIRE_ENCAP_BEEC | |
957 | /* | |
958 | * Look for magic BGP Encapsulation Extended Community value | |
959 | * Format in RFC 5512 Sect. 4.5 | |
960 | */ | |
d62a17ae | 961 | static int rfapiEcommunitiesMatchBeec(struct ecommunity *ecom, |
962 | bgp_encap_types type) | |
65efcfce | 963 | { |
d62a17ae | 964 | int i; |
65efcfce | 965 | |
d62a17ae | 966 | if (!ecom) |
967 | return 0; | |
65efcfce | 968 | |
d62a17ae | 969 | for (i = 0; i < (ecom->size * ECOMMUNITY_SIZE); i += ECOMMUNITY_SIZE) { |
65efcfce | 970 | |
d62a17ae | 971 | uint8_t *ep; |
65efcfce | 972 | |
d62a17ae | 973 | ep = ecom->val + i; |
65efcfce | 974 | |
d62a17ae | 975 | if (ep[0] == ECOMMUNITY_ENCODE_OPAQUE |
976 | && ep[1] == ECOMMUNITY_OPAQUE_SUBTYPE_ENCAP | |
977 | && ep[6] == ((type && 0xff00) >> 8) | |
978 | && ep[7] == (type & 0xff)) { | |
65efcfce | 979 | |
d62a17ae | 980 | return 1; |
981 | } | |
982 | } | |
983 | return 0; | |
65efcfce LB |
984 | } |
985 | #endif | |
986 | ||
d62a17ae | 987 | int rfapiEcommunitiesIntersect(struct ecommunity *e1, struct ecommunity *e2) |
65efcfce | 988 | { |
d62a17ae | 989 | int i, j; |
990 | ||
991 | if (!e1 || !e2) | |
992 | return 0; | |
993 | ||
994 | { | |
995 | char *s1, *s2; | |
996 | s1 = ecommunity_ecom2str(e1, ECOMMUNITY_FORMAT_DISPLAY, 0); | |
997 | s2 = ecommunity_ecom2str(e2, ECOMMUNITY_FORMAT_DISPLAY, 0); | |
998 | vnc_zlog_debug_verbose("%s: e1[%s], e2[%s]", __func__, s1, s2); | |
999 | XFREE(MTYPE_ECOMMUNITY_STR, s1); | |
1000 | XFREE(MTYPE_ECOMMUNITY_STR, s2); | |
1001 | } | |
1002 | ||
1003 | for (i = 0; i < e1->size; ++i) { | |
1004 | for (j = 0; j < e2->size; ++j) { | |
1005 | if (!memcmp(e1->val + (i * ECOMMUNITY_SIZE), | |
1006 | e2->val + (j * ECOMMUNITY_SIZE), | |
1007 | ECOMMUNITY_SIZE)) { | |
1008 | ||
1009 | return 1; | |
1010 | } | |
1011 | } | |
1012 | } | |
1013 | return 0; | |
65efcfce LB |
1014 | } |
1015 | ||
d62a17ae | 1016 | int rfapiEcommunityGetLNI(struct ecommunity *ecom, uint32_t *lni) |
65efcfce | 1017 | { |
d62a17ae | 1018 | if (ecom) { |
1019 | int i; | |
1020 | for (i = 0; i < ecom->size; ++i) { | |
1021 | uint8_t *p = ecom->val + (i * ECOMMUNITY_SIZE); | |
1022 | ||
1023 | if ((*(p + 0) == 0x00) && (*(p + 1) == 0x02)) { | |
1024 | ||
1025 | *lni = (*(p + 5) << 16) | (*(p + 6) << 8) | |
1026 | | (*(p + 7)); | |
1027 | return 0; | |
1028 | } | |
1029 | } | |
1030 | } | |
1031 | return ENOENT; | |
65efcfce LB |
1032 | } |
1033 | ||
d62a17ae | 1034 | int rfapiEcommunityGetEthernetTag(struct ecommunity *ecom, uint16_t *tag_id) |
79799987 | 1035 | { |
d62a17ae | 1036 | struct bgp *bgp = bgp_get_default(); |
1037 | *tag_id = 0; /* default to untagged */ | |
1038 | if (ecom) { | |
1039 | int i; | |
1040 | for (i = 0; i < ecom->size; ++i) { | |
1041 | as_t as = 0; | |
1042 | int encode = 0; | |
1043 | uint8_t *p = ecom->val + (i * ECOMMUNITY_SIZE); | |
1044 | ||
1045 | /* High-order octet of type. */ | |
1046 | encode = *p++; | |
1047 | ||
1048 | if (*p++ == ECOMMUNITY_ROUTE_TARGET) { | |
1049 | if (encode == ECOMMUNITY_ENCODE_AS4) { | |
937652c6 | 1050 | p = ptr_get_be32(p, &as); |
d62a17ae | 1051 | } else if (encode == ECOMMUNITY_ENCODE_AS) { |
1052 | as = (*p++ << 8); | |
1053 | as |= (*p++); | |
996c9314 LB |
1054 | p += 2; /* skip next two, tag/vid |
1055 | always in lowest bytes */ | |
d62a17ae | 1056 | } |
1057 | if (as == bgp->as) { | |
1058 | *tag_id = *p++ << 8; | |
1059 | *tag_id |= (*p++); | |
1060 | return 0; | |
1061 | } | |
1062 | } | |
1063 | } | |
1064 | } | |
1065 | return ENOENT; | |
79799987 LB |
1066 | } |
1067 | ||
40381db7 | 1068 | static int rfapiVpnBiNhEqualsPt(struct bgp_path_info *bpi, |
4b7e6066 | 1069 | struct rfapi_ip_addr *hpt) |
65efcfce | 1070 | { |
d62a17ae | 1071 | uint8_t family; |
65efcfce | 1072 | |
40381db7 | 1073 | if (!hpt || !bpi) |
d62a17ae | 1074 | return 0; |
65efcfce | 1075 | |
40381db7 | 1076 | family = BGP_MP_NEXTHOP_FAMILY(bpi->attr->mp_nexthop_len); |
65efcfce | 1077 | |
d62a17ae | 1078 | if (hpt->addr_family != family) |
1079 | return 0; | |
65efcfce | 1080 | |
d62a17ae | 1081 | switch (family) { |
1082 | case AF_INET: | |
40381db7 | 1083 | if (bpi->attr->mp_nexthop_global_in.s_addr |
d62a17ae | 1084 | != hpt->addr.v4.s_addr) |
1085 | return 0; | |
1086 | break; | |
65efcfce | 1087 | |
d62a17ae | 1088 | case AF_INET6: |
40381db7 | 1089 | if (IPV6_ADDR_CMP(&bpi->attr->mp_nexthop_global, &hpt->addr.v6)) |
d62a17ae | 1090 | return 0; |
1091 | break; | |
65efcfce | 1092 | |
d62a17ae | 1093 | default: |
1094 | return 0; | |
1095 | break; | |
1096 | } | |
65efcfce | 1097 | |
d62a17ae | 1098 | return 1; |
65efcfce LB |
1099 | } |
1100 | ||
1101 | ||
1102 | /* | |
1103 | * Compare 2 VPN BIs. Return true if they have the same VN and UN addresses | |
1104 | */ | |
40381db7 DS |
1105 | static int rfapiVpnBiSamePtUn(struct bgp_path_info *bpi1, |
1106 | struct bgp_path_info *bpi2) | |
65efcfce | 1107 | { |
d62a17ae | 1108 | struct prefix pfx_un1; |
1109 | struct prefix pfx_un2; | |
1110 | ||
40381db7 | 1111 | if (!bpi1 || !bpi2) |
d62a17ae | 1112 | return 0; |
1113 | ||
d62a17ae | 1114 | /* |
1115 | * VN address comparisons | |
1116 | */ | |
1117 | ||
40381db7 DS |
1118 | if (BGP_MP_NEXTHOP_FAMILY(bpi1->attr->mp_nexthop_len) |
1119 | != BGP_MP_NEXTHOP_FAMILY(bpi2->attr->mp_nexthop_len)) { | |
d62a17ae | 1120 | return 0; |
1121 | } | |
1122 | ||
40381db7 | 1123 | switch (BGP_MP_NEXTHOP_FAMILY(bpi1->attr->mp_nexthop_len)) { |
d62a17ae | 1124 | case AF_INET: |
40381db7 DS |
1125 | if (bpi1->attr->mp_nexthop_global_in.s_addr |
1126 | != bpi2->attr->mp_nexthop_global_in.s_addr) | |
d62a17ae | 1127 | return 0; |
1128 | break; | |
1129 | ||
1130 | case AF_INET6: | |
40381db7 DS |
1131 | if (IPV6_ADDR_CMP(&bpi1->attr->mp_nexthop_global, |
1132 | &bpi2->attr->mp_nexthop_global)) | |
d62a17ae | 1133 | return 0; |
1134 | break; | |
1135 | ||
1136 | default: | |
1137 | return 0; | |
1138 | break; | |
1139 | } | |
1140 | ||
fa3bf3a2 MS |
1141 | memset(&pfx_un1, 0, sizeof(pfx_un1)); |
1142 | memset(&pfx_un2, 0, sizeof(pfx_un2)); | |
1143 | ||
d62a17ae | 1144 | /* |
1145 | * UN address comparisons | |
1146 | */ | |
40381db7 DS |
1147 | if (rfapiGetVncTunnelUnAddr(bpi1->attr, &pfx_un1)) { |
1148 | if (bpi1->extra) { | |
1149 | pfx_un1.family = bpi1->extra->vnc.import.un_family; | |
1150 | switch (bpi1->extra->vnc.import.un_family) { | |
d62a17ae | 1151 | case AF_INET: |
1152 | pfx_un1.u.prefix4 = | |
40381db7 | 1153 | bpi1->extra->vnc.import.un.addr4; |
d62a17ae | 1154 | break; |
1155 | case AF_INET6: | |
1156 | pfx_un1.u.prefix6 = | |
40381db7 | 1157 | bpi1->extra->vnc.import.un.addr6; |
d62a17ae | 1158 | break; |
1159 | default: | |
1160 | pfx_un1.family = 0; | |
1161 | break; | |
1162 | } | |
1163 | } | |
1164 | } | |
1165 | ||
40381db7 DS |
1166 | if (rfapiGetVncTunnelUnAddr(bpi2->attr, &pfx_un2)) { |
1167 | if (bpi2->extra) { | |
1168 | pfx_un2.family = bpi2->extra->vnc.import.un_family; | |
1169 | switch (bpi2->extra->vnc.import.un_family) { | |
d62a17ae | 1170 | case AF_INET: |
1171 | pfx_un2.u.prefix4 = | |
40381db7 | 1172 | bpi2->extra->vnc.import.un.addr4; |
d62a17ae | 1173 | break; |
1174 | case AF_INET6: | |
1175 | pfx_un2.u.prefix6 = | |
40381db7 | 1176 | bpi2->extra->vnc.import.un.addr6; |
d62a17ae | 1177 | break; |
1178 | default: | |
1179 | pfx_un2.family = 0; | |
1180 | break; | |
1181 | } | |
1182 | } | |
1183 | } | |
1184 | ||
fa3bf3a2 | 1185 | if (pfx_un1.family == 0 || pfx_un2.family == 0) |
d62a17ae | 1186 | return 0; |
1187 | ||
1188 | if (pfx_un1.family != pfx_un2.family) | |
1189 | return 0; | |
1190 | ||
1191 | switch (pfx_un1.family) { | |
1192 | case AF_INET: | |
996c9314 | 1193 | if (!IPV4_ADDR_SAME(&pfx_un1.u.prefix4, &pfx_un2.u.prefix4)) |
d62a17ae | 1194 | return 0; |
1195 | break; | |
1196 | case AF_INET6: | |
1197 | if (!IPV6_ADDR_SAME(&pfx_un1.u.prefix6, &pfx_un2.u.prefix6)) | |
1198 | return 0; | |
1199 | break; | |
1200 | } | |
1201 | ||
1202 | ||
1203 | return 1; | |
65efcfce LB |
1204 | } |
1205 | ||
d62a17ae | 1206 | uint8_t rfapiRfpCost(struct attr *attr) |
65efcfce | 1207 | { |
d62a17ae | 1208 | if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF)) { |
1209 | if (attr->local_pref > 255) { | |
1210 | return 0; | |
1211 | } | |
1212 | return 255 - attr->local_pref; | |
1213 | } | |
1214 | ||
1215 | return 255; | |
65efcfce LB |
1216 | } |
1217 | ||
1218 | /*------------------------------------------ | |
1219 | * rfapi_extract_l2o | |
1220 | * | |
d62a17ae | 1221 | * Find Layer 2 options in an option chain |
65efcfce | 1222 | * |
d62a17ae | 1223 | * input: |
65efcfce LB |
1224 | * pHop option chain |
1225 | * | |
1226 | * output: | |
1227 | * l2o layer 2 options extracted | |
1228 | * | |
1229 | * return value: | |
1230 | * 0 OK | |
1231 | * 1 no options found | |
1232 | * | |
1233 | --------------------------------------------*/ | |
d62a17ae | 1234 | int rfapi_extract_l2o( |
1235 | struct bgp_tea_options *pHop, /* chain of options */ | |
1236 | struct rfapi_l2address_option *l2o) /* return extracted value */ | |
65efcfce | 1237 | { |
d62a17ae | 1238 | struct bgp_tea_options *p; |
65efcfce | 1239 | |
d62a17ae | 1240 | for (p = pHop; p; p = p->next) { |
1241 | if ((p->type == RFAPI_VN_OPTION_TYPE_L2ADDR) | |
1242 | && (p->length >= 8)) { | |
65efcfce | 1243 | |
d62a17ae | 1244 | char *v = p->value; |
65efcfce | 1245 | |
d62a17ae | 1246 | memcpy(&l2o->macaddr, v, 6); |
65efcfce | 1247 | |
d62a17ae | 1248 | l2o->label = ((v[6] << 12) & 0xff000) |
1249 | + ((v[7] << 4) & 0xff0) | |
1250 | + ((v[8] >> 4) & 0xf); | |
65efcfce | 1251 | |
d62a17ae | 1252 | l2o->local_nve_id = (uint8_t)v[10]; |
65efcfce | 1253 | |
d62a17ae | 1254 | l2o->logical_net_id = |
1255 | (v[11] << 16) + (v[12] << 8) + (v[13] << 0); | |
65efcfce | 1256 | |
d62a17ae | 1257 | return 0; |
1258 | } | |
1259 | } | |
1260 | return 1; | |
65efcfce LB |
1261 | } |
1262 | ||
1263 | static struct rfapi_next_hop_entry * | |
d62a17ae | 1264 | rfapiRouteInfo2NextHopEntry(struct rfapi_ip_prefix *rprefix, |
40381db7 DS |
1265 | struct bgp_path_info *bpi, /* route to encode */ |
1266 | uint32_t lifetime, /* use this in nhe */ | |
1267 | struct agg_node *rn) /* req for L2 eth addr */ | |
65efcfce | 1268 | { |
d62a17ae | 1269 | struct rfapi_next_hop_entry *new; |
1270 | int have_vnc_tunnel_un = 0; | |
65efcfce LB |
1271 | |
1272 | #if DEBUG_ENCAP_MONITOR | |
40381db7 | 1273 | vnc_zlog_debug_verbose("%s: entry, bpi %p, rn %p", __func__, bpi, rn); |
65efcfce LB |
1274 | #endif |
1275 | ||
d62a17ae | 1276 | new = XCALLOC(MTYPE_RFAPI_NEXTHOP, sizeof(struct rfapi_next_hop_entry)); |
1277 | assert(new); | |
1278 | ||
1279 | new->prefix = *rprefix; | |
1280 | ||
40381db7 DS |
1281 | if (bpi->extra |
1282 | && decode_rd_type(bpi->extra->vnc.import.rd.val) | |
d62a17ae | 1283 | == RD_TYPE_VNC_ETH) { |
1284 | /* ethernet */ | |
1285 | ||
1286 | struct rfapi_vn_option *vo; | |
1287 | ||
1288 | vo = XCALLOC(MTYPE_RFAPI_VN_OPTION, | |
1289 | sizeof(struct rfapi_vn_option)); | |
1290 | assert(vo); | |
1291 | ||
1292 | vo->type = RFAPI_VN_OPTION_TYPE_L2ADDR; | |
1293 | ||
1294 | memcpy(&vo->v.l2addr.macaddr, &rn->p.u.prefix_eth.octet, | |
28328ea9 | 1295 | ETH_ALEN); |
d62a17ae | 1296 | /* only low 3 bytes of this are significant */ |
05864da7 DS |
1297 | (void)rfapiEcommunityGetLNI(bpi->attr->ecommunity, |
1298 | &vo->v.l2addr.logical_net_id); | |
1299 | (void)rfapiEcommunityGetEthernetTag(bpi->attr->ecommunity, | |
1300 | &vo->v.l2addr.tag_id); | |
d62a17ae | 1301 | |
1302 | /* local_nve_id comes from lower byte of RD type */ | |
40381db7 | 1303 | vo->v.l2addr.local_nve_id = bpi->extra->vnc.import.rd.val[1]; |
d62a17ae | 1304 | |
1305 | /* label comes from MP_REACH_NLRI label */ | |
40381db7 | 1306 | vo->v.l2addr.label = decode_label(&bpi->extra->label[0]); |
d62a17ae | 1307 | |
1308 | new->vn_options = vo; | |
1309 | ||
1310 | /* | |
1311 | * If there is an auxiliary prefix (i.e., host IP address), | |
1312 | * use it as the nexthop prefix instead of the query prefix | |
1313 | */ | |
40381db7 DS |
1314 | if (bpi->extra->vnc.import.aux_prefix.family) { |
1315 | rfapiQprefix2Rprefix(&bpi->extra->vnc.import.aux_prefix, | |
d62a17ae | 1316 | &new->prefix); |
1317 | } | |
1318 | } | |
1319 | ||
05864da7 DS |
1320 | bgp_encap_types tun_type = BGP_ENCAP_TYPE_MPLS; /*Default*/ |
1321 | new->prefix.cost = rfapiRfpCost(bpi->attr); | |
d62a17ae | 1322 | |
05864da7 | 1323 | struct bgp_attr_encap_subtlv *pEncap; |
d62a17ae | 1324 | |
05864da7 DS |
1325 | switch (BGP_MP_NEXTHOP_FAMILY(bpi->attr->mp_nexthop_len)) { |
1326 | case AF_INET: | |
1327 | new->vn_address.addr_family = AF_INET; | |
1328 | new->vn_address.addr.v4 = bpi->attr->mp_nexthop_global_in; | |
1329 | break; | |
d62a17ae | 1330 | |
05864da7 DS |
1331 | case AF_INET6: |
1332 | new->vn_address.addr_family = AF_INET6; | |
1333 | new->vn_address.addr.v6 = bpi->attr->mp_nexthop_global; | |
1334 | break; | |
d62a17ae | 1335 | |
05864da7 DS |
1336 | default: |
1337 | zlog_warn("%s: invalid vpn nexthop length: %d", __func__, | |
1338 | bpi->attr->mp_nexthop_len); | |
1339 | rfapi_free_next_hop_list(new); | |
1340 | return NULL; | |
1341 | } | |
d62a17ae | 1342 | |
05864da7 DS |
1343 | for (pEncap = bpi->attr->vnc_subtlvs; pEncap; pEncap = pEncap->next) { |
1344 | switch (pEncap->type) { | |
1345 | case BGP_VNC_SUBTLV_TYPE_LIFETIME: | |
1346 | /* use configured lifetime, not attr lifetime */ | |
1347 | break; | |
d62a17ae | 1348 | |
05864da7 DS |
1349 | default: |
1350 | zlog_warn("%s: unknown VNC option type %d", __func__, | |
1351 | pEncap->type); | |
d62a17ae | 1352 | |
05864da7 | 1353 | break; |
d62a17ae | 1354 | } |
05864da7 | 1355 | } |
d62a17ae | 1356 | |
05864da7 DS |
1357 | bgp_attr_extcom_tunnel_type(bpi->attr, &tun_type); |
1358 | if (tun_type == BGP_ENCAP_TYPE_MPLS) { | |
1359 | struct prefix p; | |
1360 | /* MPLS carries UN address in next hop */ | |
1361 | rfapiNexthop2Prefix(bpi->attr, &p); | |
1362 | if (p.family != 0) { | |
1363 | rfapiQprefix2Raddr(&p, &new->un_address); | |
1364 | have_vnc_tunnel_un = 1; | |
d62a17ae | 1365 | } |
05864da7 | 1366 | } |
d62a17ae | 1367 | |
05864da7 DS |
1368 | for (pEncap = bpi->attr->encap_subtlvs; pEncap; pEncap = pEncap->next) { |
1369 | switch (pEncap->type) { | |
1370 | case BGP_ENCAP_SUBTLV_TYPE_REMOTE_ENDPOINT: | |
1371 | /* | |
1372 | * Overrides ENCAP UN address, if any | |
1373 | */ | |
1374 | switch (pEncap->length) { | |
d62a17ae | 1375 | |
05864da7 DS |
1376 | case 8: |
1377 | new->un_address.addr_family = AF_INET; | |
1378 | memcpy(&new->un_address.addr.v4, pEncap->value, | |
1379 | 4); | |
1380 | have_vnc_tunnel_un = 1; | |
1381 | break; | |
d62a17ae | 1382 | |
05864da7 DS |
1383 | case 20: |
1384 | new->un_address.addr_family = AF_INET6; | |
1385 | memcpy(&new->un_address.addr.v6, pEncap->value, | |
1386 | 16); | |
1387 | have_vnc_tunnel_un = 1; | |
d62a17ae | 1388 | break; |
1389 | ||
1390 | default: | |
1391 | zlog_warn( | |
05864da7 DS |
1392 | "%s: invalid tunnel subtlv UN addr length (%d) for bpi %p", |
1393 | __func__, pEncap->length, bpi); | |
d62a17ae | 1394 | } |
05864da7 DS |
1395 | break; |
1396 | ||
1397 | default: | |
1398 | zlog_warn("%s: unknown Encap Attribute option type %d", | |
1399 | __func__, pEncap->type); | |
1400 | break; | |
d62a17ae | 1401 | } |
05864da7 | 1402 | } |
d62a17ae | 1403 | |
05864da7 | 1404 | new->un_options = rfapi_encap_tlv_to_un_option(bpi->attr); |
65efcfce LB |
1405 | |
1406 | #if DEBUG_ENCAP_MONITOR | |
05864da7 DS |
1407 | vnc_zlog_debug_verbose("%s: line %d: have_vnc_tunnel_un=%d", __func__, |
1408 | __LINE__, have_vnc_tunnel_un); | |
65efcfce LB |
1409 | #endif |
1410 | ||
05864da7 DS |
1411 | if (!have_vnc_tunnel_un && bpi->extra) { |
1412 | /* | |
1413 | * use cached UN address from ENCAP route | |
1414 | */ | |
1415 | new->un_address.addr_family = bpi->extra->vnc.import.un_family; | |
1416 | switch (new->un_address.addr_family) { | |
1417 | case AF_INET: | |
1418 | new->un_address.addr.v4 = | |
1419 | bpi->extra->vnc.import.un.addr4; | |
1420 | break; | |
1421 | case AF_INET6: | |
1422 | new->un_address.addr.v6 = | |
1423 | bpi->extra->vnc.import.un.addr6; | |
1424 | break; | |
1425 | default: | |
1426 | zlog_warn("%s: invalid UN addr family (%d) for bpi %p", | |
1427 | __func__, new->un_address.addr_family, bpi); | |
1428 | rfapi_free_next_hop_list(new); | |
1429 | return NULL; | |
1430 | break; | |
d62a17ae | 1431 | } |
1432 | } | |
1433 | ||
1434 | new->lifetime = lifetime; | |
1435 | return new; | |
65efcfce LB |
1436 | } |
1437 | ||
fe08ba7e | 1438 | int rfapiHasNonRemovedRoutes(struct agg_node *rn) |
65efcfce | 1439 | { |
40381db7 | 1440 | struct bgp_path_info *bpi; |
65efcfce | 1441 | |
40381db7 | 1442 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 1443 | struct prefix pfx; |
65efcfce | 1444 | |
40381db7 DS |
1445 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
1446 | && (bpi->extra && !rfapiGetUnAddrOfVpnBi(bpi, &pfx))) { | |
65efcfce | 1447 | |
d62a17ae | 1448 | return 1; |
1449 | } | |
1450 | } | |
1451 | return 0; | |
65efcfce LB |
1452 | } |
1453 | ||
1454 | #if DEBUG_IT_NODES | |
d62a17ae | 1455 | /* |
65efcfce LB |
1456 | * DEBUG FUNCTION |
1457 | */ | |
fe08ba7e | 1458 | void rfapiDumpNode(struct agg_node *rn) |
65efcfce | 1459 | { |
40381db7 | 1460 | struct bgp_path_info *bpi; |
d62a17ae | 1461 | |
1462 | vnc_zlog_debug_verbose("%s: rn=%p", __func__, rn); | |
40381db7 | 1463 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 1464 | struct prefix pfx; |
40381db7 | 1465 | int ctrc = rfapiGetUnAddrOfVpnBi(bpi, &pfx); |
d62a17ae | 1466 | int nr; |
1467 | ||
40381db7 DS |
1468 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
1469 | && (bpi->extra && !ctrc)) { | |
d62a17ae | 1470 | |
1471 | nr = 1; | |
1472 | } else { | |
1473 | nr = 0; | |
1474 | } | |
1475 | ||
1476 | vnc_zlog_debug_verbose( | |
40381db7 DS |
1477 | " bpi=%p, nr=%d, flags=0x%x, extra=%p, ctrc=%d", bpi, |
1478 | nr, bpi->flags, bpi->extra, ctrc); | |
d62a17ae | 1479 | } |
65efcfce LB |
1480 | } |
1481 | #endif | |
1482 | ||
d62a17ae | 1483 | static int rfapiNhlAddNodeRoutes( |
fe08ba7e | 1484 | struct agg_node *rn, /* in */ |
d62a17ae | 1485 | struct rfapi_ip_prefix *rprefix, /* in */ |
1486 | uint32_t lifetime, /* in */ | |
1487 | int removed, /* in */ | |
1488 | struct rfapi_next_hop_entry **head, /* in/out */ | |
1489 | struct rfapi_next_hop_entry **tail, /* in/out */ | |
1490 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
fe08ba7e | 1491 | struct agg_node *rfd_rib_node, /* preload this NVE rib node */ |
d62a17ae | 1492 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1493 | { |
40381db7 | 1494 | struct bgp_path_info *bpi; |
d62a17ae | 1495 | struct rfapi_next_hop_entry *new; |
1496 | struct prefix pfx_un; | |
1497 | struct skiplist *seen_nexthops; | |
1498 | int count = 0; | |
1499 | int is_l2 = (rn->p.family == AF_ETHERNET); | |
1500 | ||
fe08ba7e DS |
1501 | if (rfd_rib_node) { |
1502 | struct agg_table *atable = agg_get_table(rfd_rib_node); | |
84cc1207 PZ |
1503 | struct rfapi_descriptor *rfd; |
1504 | ||
fe08ba7e DS |
1505 | if (atable) { |
1506 | rfd = agg_get_table_info(atable); | |
84cc1207 | 1507 | |
fe08ba7e DS |
1508 | if (rfapiRibFTDFilterRecentPrefix(rfd, rn, |
1509 | pfx_target_original)) | |
1510 | return 0; | |
1511 | } | |
d62a17ae | 1512 | } |
1513 | ||
1514 | seen_nexthops = | |
63265b5c | 1515 | skiplist_new(0, vnc_prefix_cmp, prefix_free_lists); |
d62a17ae | 1516 | |
40381db7 | 1517 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 1518 | |
1519 | struct prefix pfx_vn; | |
1520 | struct prefix *newpfx; | |
1521 | ||
40381db7 | 1522 | if (removed && !CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
65efcfce | 1523 | #if DEBUG_RETURNED_NHL |
d62a17ae | 1524 | vnc_zlog_debug_verbose( |
1525 | "%s: want holddown, this route not holddown, skip", | |
1526 | __func__); | |
65efcfce | 1527 | #endif |
d62a17ae | 1528 | continue; |
1529 | } | |
40381db7 | 1530 | if (!removed && CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
d62a17ae | 1531 | continue; |
1532 | } | |
1533 | ||
40381db7 | 1534 | if (!bpi->extra) { |
d62a17ae | 1535 | continue; |
1536 | } | |
1537 | ||
1538 | /* | |
1539 | * Check for excluded VN address | |
1540 | */ | |
40381db7 | 1541 | if (rfapiVpnBiNhEqualsPt(bpi, exclude_vnaddr)) |
d62a17ae | 1542 | continue; |
1543 | ||
1544 | /* | |
1545 | * Check for VN address (nexthop) copied already | |
1546 | */ | |
1547 | if (is_l2) { | |
1548 | /* L2 routes: semantic nexthop in aux_prefix; VN addr | |
1549 | * ain't it */ | |
40381db7 | 1550 | pfx_vn = bpi->extra->vnc.import.aux_prefix; |
d62a17ae | 1551 | } else { |
40381db7 | 1552 | rfapiNexthop2Prefix(bpi->attr, &pfx_vn); |
d62a17ae | 1553 | } |
1554 | if (!skiplist_search(seen_nexthops, &pfx_vn, NULL)) { | |
65efcfce | 1555 | #if DEBUG_RETURNED_NHL |
872ed4c7 | 1556 | char buf[PREFIX_STRLEN]; |
65efcfce | 1557 | |
872ed4c7 | 1558 | prefix2str(&pfx_vn, buf, sizeof(buf)); |
d62a17ae | 1559 | vnc_zlog_debug_verbose( |
1560 | "%s: already put VN/nexthop %s, skip", __func__, | |
1561 | buf); | |
65efcfce | 1562 | #endif |
d62a17ae | 1563 | continue; |
1564 | } | |
65efcfce | 1565 | |
40381db7 | 1566 | if (rfapiGetUnAddrOfVpnBi(bpi, &pfx_un)) { |
65efcfce | 1567 | #if DEBUG_ENCAP_MONITOR |
d62a17ae | 1568 | vnc_zlog_debug_verbose( |
40381db7 | 1569 | "%s: failed to get UN address of this VPN bpi", |
d62a17ae | 1570 | __func__); |
65efcfce | 1571 | #endif |
d62a17ae | 1572 | continue; |
1573 | } | |
1574 | ||
1575 | newpfx = prefix_new(); | |
1576 | *newpfx = pfx_vn; | |
1577 | skiplist_insert(seen_nexthops, newpfx, newpfx); | |
1578 | ||
40381db7 | 1579 | new = rfapiRouteInfo2NextHopEntry(rprefix, bpi, lifetime, rn); |
d62a17ae | 1580 | if (new) { |
1581 | if (rfapiRibPreloadBi(rfd_rib_node, &pfx_vn, &pfx_un, | |
40381db7 | 1582 | lifetime, bpi)) { |
d62a17ae | 1583 | /* duplicate filtered by RIB */ |
1584 | rfapi_free_next_hop_list(new); | |
1585 | new = NULL; | |
1586 | } | |
1587 | } | |
1588 | ||
1589 | if (new) { | |
1590 | if (*tail) { | |
1591 | (*tail)->next = new; | |
1592 | } else { | |
1593 | *head = new; | |
1594 | } | |
1595 | *tail = new; | |
1596 | ++count; | |
1597 | } | |
1598 | } | |
1599 | ||
1600 | skiplist_free(seen_nexthops); | |
1601 | ||
1602 | return count; | |
65efcfce LB |
1603 | } |
1604 | ||
1605 | ||
1606 | /* | |
1607 | * Breadth-first | |
1608 | * | |
1609 | * omit_node is meant for the situation where we are adding a subtree | |
1610 | * of a parent of some original requested node. The response already | |
1611 | * contains the original requested node, and we don't want to duplicate | |
1612 | * its routes in the list, so we skip it if the right or left node | |
1613 | * matches (of course, we still travel down its child subtrees). | |
1614 | */ | |
d62a17ae | 1615 | static int rfapiNhlAddSubtree( |
fe08ba7e | 1616 | struct agg_node *rn, /* in */ |
d62a17ae | 1617 | uint32_t lifetime, /* in */ |
1618 | struct rfapi_next_hop_entry **head, /* in/out */ | |
1619 | struct rfapi_next_hop_entry **tail, /* in/out */ | |
fe08ba7e | 1620 | struct agg_node *omit_node, /* in */ |
d62a17ae | 1621 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ |
fe08ba7e | 1622 | struct agg_table *rfd_rib_table, /* preload here */ |
d62a17ae | 1623 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1624 | { |
d62a17ae | 1625 | struct rfapi_ip_prefix rprefix; |
1626 | int rcount = 0; | |
1627 | ||
1628 | /* FIXME: need to find a better way here to work without sticking our | |
1629 | * hands in node->link */ | |
fe08ba7e DS |
1630 | if (agg_node_left(rn) && agg_node_left(rn) != omit_node) { |
1631 | if (agg_node_left(rn)->info) { | |
d62a17ae | 1632 | int count = 0; |
fe08ba7e | 1633 | struct agg_node *rib_rn = NULL; |
d62a17ae | 1634 | |
fe08ba7e | 1635 | rfapiQprefix2Rprefix(&agg_node_left(rn)->p, &rprefix); |
d62a17ae | 1636 | if (rfd_rib_table) { |
fe08ba7e DS |
1637 | rib_rn = agg_node_get(rfd_rib_table, |
1638 | &agg_node_left(rn)->p); | |
d62a17ae | 1639 | } |
1640 | ||
1641 | count = rfapiNhlAddNodeRoutes( | |
fe08ba7e DS |
1642 | agg_node_left(rn), &rprefix, lifetime, 0, head, |
1643 | tail, exclude_vnaddr, rib_rn, | |
1644 | pfx_target_original); | |
d62a17ae | 1645 | if (!count) { |
1646 | count = rfapiNhlAddNodeRoutes( | |
fe08ba7e DS |
1647 | agg_node_left(rn), &rprefix, lifetime, |
1648 | 1, head, tail, exclude_vnaddr, rib_rn, | |
d62a17ae | 1649 | pfx_target_original); |
1650 | } | |
1651 | rcount += count; | |
1652 | if (rib_rn) | |
fe08ba7e | 1653 | agg_unlock_node(rib_rn); |
d62a17ae | 1654 | } |
1655 | } | |
1656 | ||
fe08ba7e DS |
1657 | if (agg_node_right(rn) && agg_node_right(rn) != omit_node) { |
1658 | if (agg_node_right(rn)->info) { | |
d62a17ae | 1659 | int count = 0; |
fe08ba7e | 1660 | struct agg_node *rib_rn = NULL; |
d62a17ae | 1661 | |
fe08ba7e | 1662 | rfapiQprefix2Rprefix(&agg_node_right(rn)->p, &rprefix); |
d62a17ae | 1663 | if (rfd_rib_table) { |
fe08ba7e DS |
1664 | rib_rn = agg_node_get(rfd_rib_table, |
1665 | &agg_node_right(rn)->p); | |
d62a17ae | 1666 | } |
1667 | count = rfapiNhlAddNodeRoutes( | |
fe08ba7e DS |
1668 | agg_node_right(rn), &rprefix, lifetime, 0, head, |
1669 | tail, exclude_vnaddr, rib_rn, | |
1670 | pfx_target_original); | |
d62a17ae | 1671 | if (!count) { |
1672 | count = rfapiNhlAddNodeRoutes( | |
fe08ba7e DS |
1673 | agg_node_right(rn), &rprefix, lifetime, |
1674 | 1, head, tail, exclude_vnaddr, rib_rn, | |
d62a17ae | 1675 | pfx_target_original); |
1676 | } | |
1677 | rcount += count; | |
1678 | if (rib_rn) | |
fe08ba7e | 1679 | agg_unlock_node(rib_rn); |
d62a17ae | 1680 | } |
1681 | } | |
1682 | ||
fe08ba7e | 1683 | if (agg_node_left(rn)) { |
d62a17ae | 1684 | rcount += rfapiNhlAddSubtree( |
fe08ba7e | 1685 | agg_node_left(rn), lifetime, head, tail, omit_node, |
d62a17ae | 1686 | exclude_vnaddr, rfd_rib_table, pfx_target_original); |
1687 | } | |
fe08ba7e | 1688 | if (agg_node_right(rn)) { |
d62a17ae | 1689 | rcount += rfapiNhlAddSubtree( |
fe08ba7e | 1690 | agg_node_right(rn), lifetime, head, tail, omit_node, |
d62a17ae | 1691 | exclude_vnaddr, rfd_rib_table, pfx_target_original); |
1692 | } | |
1693 | ||
1694 | return rcount; | |
65efcfce LB |
1695 | } |
1696 | ||
1697 | /* | |
1698 | * Implementation of ROUTE_LIST(node) from RFAPI-Import-Event-Handling.txt | |
1699 | * | |
1700 | * Construct an rfapi nexthop list based on the routes attached to | |
1701 | * the specified node. | |
1702 | * | |
1defdda8 DS |
1703 | * If there are any routes that do NOT have BGP_PATH_REMOVED set, |
1704 | * return those only. If there are ONLY routes with BGP_PATH_REMOVED, | |
65efcfce LB |
1705 | * then return those, and also include all the non-removed routes from the |
1706 | * next less-specific node (i.e., this node's parent) at the end. | |
1707 | */ | |
d62a17ae | 1708 | struct rfapi_next_hop_entry *rfapiRouteNode2NextHopList( |
fe08ba7e DS |
1709 | struct agg_node *rn, uint32_t lifetime, /* put into nexthop entries */ |
1710 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
1711 | struct agg_table *rfd_rib_table, /* preload here */ | |
1712 | struct prefix *pfx_target_original) /* query target */ | |
65efcfce | 1713 | { |
d62a17ae | 1714 | struct rfapi_ip_prefix rprefix; |
1715 | struct rfapi_next_hop_entry *answer = NULL; | |
1716 | struct rfapi_next_hop_entry *last = NULL; | |
fe08ba7e | 1717 | struct agg_node *parent; |
d62a17ae | 1718 | int count = 0; |
fe08ba7e | 1719 | struct agg_node *rib_rn; |
65efcfce LB |
1720 | |
1721 | #if DEBUG_RETURNED_NHL | |
d62a17ae | 1722 | { |
872ed4c7 | 1723 | char buf[PREFIX_STRLEN]; |
d62a17ae | 1724 | |
872ed4c7 | 1725 | prefix2str(&rn->p, buf, sizeof(buf)); |
d62a17ae | 1726 | vnc_zlog_debug_verbose("%s: called with node pfx=%s", __func__, |
1727 | buf); | |
1728 | } | |
1729 | rfapiDebugBacktrace(); | |
65efcfce LB |
1730 | #endif |
1731 | ||
d62a17ae | 1732 | rfapiQprefix2Rprefix(&rn->p, &rprefix); |
1733 | ||
fe08ba7e | 1734 | rib_rn = rfd_rib_table ? agg_node_get(rfd_rib_table, &rn->p) : NULL; |
d62a17ae | 1735 | |
1736 | /* | |
1737 | * Add non-withdrawn routes at this node | |
1738 | */ | |
1739 | count = rfapiNhlAddNodeRoutes(rn, &rprefix, lifetime, 0, &answer, &last, | |
1740 | exclude_vnaddr, rib_rn, | |
1741 | pfx_target_original); | |
1742 | ||
1743 | /* | |
1744 | * If the list has at least one entry, it's finished | |
1745 | */ | |
1746 | if (count) { | |
1747 | count += rfapiNhlAddSubtree(rn, lifetime, &answer, &last, NULL, | |
1748 | exclude_vnaddr, rfd_rib_table, | |
1749 | pfx_target_original); | |
1750 | vnc_zlog_debug_verbose("%s: %d nexthops, answer=%p", __func__, | |
1751 | count, answer); | |
65efcfce | 1752 | #if DEBUG_RETURNED_NHL |
d62a17ae | 1753 | rfapiPrintNhl(NULL, answer); |
65efcfce | 1754 | #endif |
d62a17ae | 1755 | if (rib_rn) |
fe08ba7e | 1756 | agg_unlock_node(rib_rn); |
d62a17ae | 1757 | return answer; |
1758 | } | |
1759 | ||
1760 | /* | |
1761 | * Add withdrawn routes at this node | |
1762 | */ | |
1763 | count = rfapiNhlAddNodeRoutes(rn, &rprefix, lifetime, 1, &answer, &last, | |
1764 | exclude_vnaddr, rib_rn, | |
1765 | pfx_target_original); | |
1766 | if (rib_rn) | |
fe08ba7e | 1767 | agg_unlock_node(rib_rn); |
d62a17ae | 1768 | |
1769 | // rfapiPrintNhl(NULL, answer); | |
1770 | ||
1771 | /* | |
1772 | * walk up the tree until we find a node with non-deleted | |
1773 | * routes, then add them | |
1774 | */ | |
fe08ba7e DS |
1775 | for (parent = agg_node_parent(rn); parent; |
1776 | parent = agg_node_parent(parent)) { | |
d62a17ae | 1777 | if (rfapiHasNonRemovedRoutes(parent)) { |
1778 | break; | |
1779 | } | |
1780 | } | |
1781 | ||
1782 | /* | |
1783 | * Add non-withdrawn routes from less-specific prefix | |
1784 | */ | |
1785 | if (parent) { | |
fe08ba7e DS |
1786 | rib_rn = rfd_rib_table ? agg_node_get(rfd_rib_table, &parent->p) |
1787 | : NULL; | |
d62a17ae | 1788 | rfapiQprefix2Rprefix(&parent->p, &rprefix); |
1789 | count += rfapiNhlAddNodeRoutes(parent, &rprefix, lifetime, 0, | |
1790 | &answer, &last, exclude_vnaddr, | |
1791 | rib_rn, pfx_target_original); | |
1792 | count += rfapiNhlAddSubtree(parent, lifetime, &answer, &last, | |
1793 | rn, exclude_vnaddr, rfd_rib_table, | |
1794 | pfx_target_original); | |
1795 | if (rib_rn) | |
fe08ba7e | 1796 | agg_unlock_node(rib_rn); |
d62a17ae | 1797 | } else { |
1798 | /* | |
1799 | * There is no parent with non-removed routes. Still need to | |
1800 | * add subtree of original node if it contributed routes to the | |
1801 | * answer. | |
1802 | */ | |
1803 | if (count) | |
1804 | count += rfapiNhlAddSubtree(rn, lifetime, &answer, | |
1805 | &last, rn, exclude_vnaddr, | |
1806 | rfd_rib_table, | |
1807 | pfx_target_original); | |
1808 | } | |
1809 | ||
1810 | vnc_zlog_debug_verbose("%s: %d nexthops, answer=%p", __func__, count, | |
1811 | answer); | |
65efcfce | 1812 | #if DEBUG_RETURNED_NHL |
d62a17ae | 1813 | rfapiPrintNhl(NULL, answer); |
65efcfce | 1814 | #endif |
d62a17ae | 1815 | return answer; |
65efcfce LB |
1816 | } |
1817 | ||
1818 | /* | |
1819 | * Construct nexthop list of all routes in table | |
1820 | */ | |
d62a17ae | 1821 | struct rfapi_next_hop_entry *rfapiRouteTable2NextHopList( |
fe08ba7e DS |
1822 | struct agg_table *rt, uint32_t lifetime, /* put into nexthop entries */ |
1823 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
1824 | struct agg_table *rfd_rib_table, /* preload this NVE rib table */ | |
1825 | struct prefix *pfx_target_original) /* query target */ | |
65efcfce | 1826 | { |
fe08ba7e | 1827 | struct agg_node *rn; |
d62a17ae | 1828 | struct rfapi_next_hop_entry *biglist = NULL; |
1829 | struct rfapi_next_hop_entry *nhl; | |
1830 | struct rfapi_next_hop_entry *tail = NULL; | |
1831 | int count = 0; | |
1832 | ||
fe08ba7e | 1833 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
d62a17ae | 1834 | |
1835 | nhl = rfapiRouteNode2NextHopList(rn, lifetime, exclude_vnaddr, | |
1836 | rfd_rib_table, | |
1837 | pfx_target_original); | |
1838 | if (!tail) { | |
1839 | tail = biglist = nhl; | |
1840 | if (tail) | |
1841 | count = 1; | |
1842 | } else { | |
1843 | tail->next = nhl; | |
1844 | } | |
1845 | if (tail) { | |
1846 | while (tail->next) { | |
1847 | ++count; | |
1848 | tail = tail->next; | |
1849 | } | |
1850 | } | |
1851 | } | |
1852 | ||
1853 | vnc_zlog_debug_verbose("%s: returning %d routes", __func__, count); | |
1854 | return biglist; | |
65efcfce LB |
1855 | } |
1856 | ||
d62a17ae | 1857 | struct rfapi_next_hop_entry *rfapiEthRouteNode2NextHopList( |
fe08ba7e | 1858 | struct agg_node *rn, struct rfapi_ip_prefix *rprefix, |
d62a17ae | 1859 | uint32_t lifetime, /* put into nexthop entries */ |
1860 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
fe08ba7e | 1861 | struct agg_table *rfd_rib_table, /* preload NVE rib table */ |
d62a17ae | 1862 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1863 | { |
d62a17ae | 1864 | int count = 0; |
1865 | struct rfapi_next_hop_entry *answer = NULL; | |
1866 | struct rfapi_next_hop_entry *last = NULL; | |
fe08ba7e | 1867 | struct agg_node *rib_rn; |
65efcfce | 1868 | |
fe08ba7e | 1869 | rib_rn = rfd_rib_table ? agg_node_get(rfd_rib_table, &rn->p) : NULL; |
65efcfce | 1870 | |
d62a17ae | 1871 | count = rfapiNhlAddNodeRoutes(rn, rprefix, lifetime, 0, &answer, &last, |
1872 | NULL, rib_rn, pfx_target_original); | |
65efcfce LB |
1873 | |
1874 | #if DEBUG_ENCAP_MONITOR | |
d62a17ae | 1875 | vnc_zlog_debug_verbose("%s: node %p: %d non-holddown routes", __func__, |
1876 | rn, count); | |
65efcfce LB |
1877 | #endif |
1878 | ||
d62a17ae | 1879 | if (!count) { |
1880 | count = rfapiNhlAddNodeRoutes(rn, rprefix, lifetime, 1, &answer, | |
1881 | &last, exclude_vnaddr, rib_rn, | |
1882 | pfx_target_original); | |
1883 | vnc_zlog_debug_verbose("%s: node %p: %d holddown routes", | |
1884 | __func__, rn, count); | |
1885 | } | |
65efcfce | 1886 | |
d62a17ae | 1887 | if (rib_rn) |
fe08ba7e | 1888 | agg_unlock_node(rib_rn); |
65efcfce LB |
1889 | |
1890 | #if DEBUG_RETURNED_NHL | |
d62a17ae | 1891 | rfapiPrintNhl(NULL, answer); |
65efcfce LB |
1892 | #endif |
1893 | ||
d62a17ae | 1894 | return answer; |
65efcfce LB |
1895 | } |
1896 | ||
1897 | ||
1898 | /* | |
1899 | * Construct nexthop list of all routes in table | |
1900 | */ | |
d62a17ae | 1901 | struct rfapi_next_hop_entry *rfapiEthRouteTable2NextHopList( |
1902 | uint32_t logical_net_id, struct rfapi_ip_prefix *rprefix, | |
1903 | uint32_t lifetime, /* put into nexthop entries */ | |
1904 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
fe08ba7e | 1905 | struct agg_table *rfd_rib_table, /* preload NVE rib node */ |
d62a17ae | 1906 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1907 | { |
d62a17ae | 1908 | struct rfapi_import_table *it; |
1909 | struct bgp *bgp = bgp_get_default(); | |
fe08ba7e DS |
1910 | struct agg_table *rt; |
1911 | struct agg_node *rn; | |
d62a17ae | 1912 | struct rfapi_next_hop_entry *biglist = NULL; |
1913 | struct rfapi_next_hop_entry *nhl; | |
1914 | struct rfapi_next_hop_entry *tail = NULL; | |
1915 | int count = 0; | |
1916 | ||
1917 | ||
1918 | it = rfapiMacImportTableGet(bgp, logical_net_id); | |
1919 | rt = it->imported_vpn[AFI_L2VPN]; | |
1920 | ||
fe08ba7e | 1921 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
d62a17ae | 1922 | |
1923 | nhl = rfapiEthRouteNode2NextHopList( | |
1924 | rn, rprefix, lifetime, exclude_vnaddr, rfd_rib_table, | |
1925 | pfx_target_original); | |
1926 | if (!tail) { | |
1927 | tail = biglist = nhl; | |
1928 | if (tail) | |
1929 | count = 1; | |
1930 | } else { | |
1931 | tail->next = nhl; | |
1932 | } | |
1933 | if (tail) { | |
1934 | while (tail->next) { | |
1935 | ++count; | |
1936 | tail = tail->next; | |
1937 | } | |
1938 | } | |
1939 | } | |
1940 | ||
1941 | vnc_zlog_debug_verbose("%s: returning %d routes", __func__, count); | |
1942 | return biglist; | |
65efcfce LB |
1943 | } |
1944 | ||
1945 | /* | |
40381db7 DS |
1946 | * Insert a new bpi to the imported route table node, |
1947 | * keeping the list of BPIs sorted best route first | |
65efcfce | 1948 | */ |
fe08ba7e | 1949 | static void rfapiBgpInfoAttachSorted(struct agg_node *rn, |
4b7e6066 | 1950 | struct bgp_path_info *info_new, afi_t afi, |
d62a17ae | 1951 | safi_t safi) |
65efcfce | 1952 | { |
d62a17ae | 1953 | struct bgp *bgp; |
4b7e6066 DS |
1954 | struct bgp_path_info *prev; |
1955 | struct bgp_path_info *next; | |
d62a17ae | 1956 | char pfx_buf[PREFIX2STR_BUFFER]; |
1957 | ||
1958 | ||
1959 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
1960 | ||
1961 | if (VNC_DEBUG(IMPORT_BI_ATTACH)) { | |
1962 | vnc_zlog_debug_verbose("%s: info_new->peer=%p", __func__, | |
1963 | info_new->peer); | |
1964 | vnc_zlog_debug_verbose("%s: info_new->peer->su_remote=%p", | |
1965 | __func__, info_new->peer->su_remote); | |
1966 | } | |
1967 | ||
1968 | for (prev = NULL, next = rn->info; next; | |
1969 | prev = next, next = next->next) { | |
fdf81fa0 DS |
1970 | enum bgp_path_selection_reason reason; |
1971 | ||
1defdda8 DS |
1972 | if (!bgp |
1973 | || (!CHECK_FLAG(info_new->flags, BGP_PATH_REMOVED) | |
1974 | && CHECK_FLAG(next->flags, BGP_PATH_REMOVED)) | |
18ee8310 | 1975 | || bgp_path_info_cmp_compatible(bgp, info_new, next, |
fdf81fa0 DS |
1976 | pfx_buf, afi, safi, |
1977 | &reason) | |
d62a17ae | 1978 | == -1) { /* -1 if 1st is better */ |
1979 | break; | |
1980 | } | |
1981 | } | |
1982 | vnc_zlog_debug_verbose("%s: prev=%p, next=%p", __func__, prev, next); | |
1983 | if (prev) { | |
1984 | prev->next = info_new; | |
1985 | } else { | |
1986 | rn->info = info_new; | |
1987 | } | |
1988 | info_new->prev = prev; | |
1989 | info_new->next = next; | |
1990 | if (next) | |
1991 | next->prev = info_new; | |
1992 | bgp_attr_intern(info_new->attr); | |
65efcfce LB |
1993 | } |
1994 | ||
40381db7 | 1995 | static void rfapiBgpInfoDetach(struct agg_node *rn, struct bgp_path_info *bpi) |
65efcfce | 1996 | { |
d62a17ae | 1997 | /* |
1998 | * Remove the route (doubly-linked) | |
1999 | */ | |
40381db7 DS |
2000 | // bgp_attr_unintern (&bpi->attr); |
2001 | if (bpi->next) | |
2002 | bpi->next->prev = bpi->prev; | |
2003 | if (bpi->prev) | |
2004 | bpi->prev->next = bpi->next; | |
d62a17ae | 2005 | else |
40381db7 | 2006 | rn->info = bpi->next; |
65efcfce LB |
2007 | } |
2008 | ||
2009 | /* | |
2010 | * For L3-indexed import tables | |
2011 | */ | |
d62a17ae | 2012 | static int rfapi_bi_peer_rd_cmp(void *b1, void *b2) |
65efcfce | 2013 | { |
40381db7 DS |
2014 | struct bgp_path_info *bpi1 = b1; |
2015 | struct bgp_path_info *bpi2 = b2; | |
d62a17ae | 2016 | |
2017 | /* | |
2018 | * Compare peers | |
2019 | */ | |
40381db7 | 2020 | if (bpi1->peer < bpi2->peer) |
d62a17ae | 2021 | return -1; |
40381db7 | 2022 | if (bpi1->peer > bpi2->peer) |
d62a17ae | 2023 | return 1; |
2024 | ||
2025 | /* | |
2026 | * compare RDs | |
2027 | */ | |
40381db7 DS |
2028 | return vnc_prefix_cmp((struct prefix *)&bpi1->extra->vnc.import.rd, |
2029 | (struct prefix *)&bpi2->extra->vnc.import.rd); | |
65efcfce LB |
2030 | } |
2031 | ||
2032 | /* | |
2033 | * For L2-indexed import tables | |
40381db7 | 2034 | * The BPIs in these tables should ALWAYS have an aux_prefix set because |
65efcfce LB |
2035 | * they arrive via IPv4 or IPv6 advertisements. |
2036 | */ | |
d62a17ae | 2037 | static int rfapi_bi_peer_rd_aux_cmp(void *b1, void *b2) |
65efcfce | 2038 | { |
40381db7 DS |
2039 | struct bgp_path_info *bpi1 = b1; |
2040 | struct bgp_path_info *bpi2 = b2; | |
d62a17ae | 2041 | int rc; |
2042 | ||
2043 | /* | |
2044 | * Compare peers | |
2045 | */ | |
40381db7 | 2046 | if (bpi1->peer < bpi2->peer) |
d62a17ae | 2047 | return -1; |
40381db7 | 2048 | if (bpi1->peer > bpi2->peer) |
d62a17ae | 2049 | return 1; |
2050 | ||
2051 | /* | |
2052 | * compare RDs | |
2053 | */ | |
40381db7 DS |
2054 | rc = vnc_prefix_cmp((struct prefix *)&bpi1->extra->vnc.import.rd, |
2055 | (struct prefix *)&bpi2->extra->vnc.import.rd); | |
d62a17ae | 2056 | if (rc) { |
2057 | return rc; | |
2058 | } | |
2059 | ||
2060 | /* | |
2061 | * L2 import tables can have multiple entries with the | |
2062 | * same MAC address, same RD, but different L3 addresses. | |
2063 | * | |
2064 | * Use presence of aux_prefix with AF=ethernet and prefixlen=1 | |
2065 | * as magic value to signify explicit wildcarding of the aux_prefix. | |
40381db7 DS |
2066 | * This magic value will not appear in bona fide bpi entries in |
2067 | * the import table, but is allowed in the "fake" bpi used to | |
d62a17ae | 2068 | * probe the table when searching. (We have to test both b1 and b2 |
2069 | * because there is no guarantee of the order the test key and | |
2070 | * the real key will be passed) | |
2071 | */ | |
40381db7 DS |
2072 | if ((bpi1->extra->vnc.import.aux_prefix.family == AF_ETHERNET |
2073 | && (bpi1->extra->vnc.import.aux_prefix.prefixlen == 1)) | |
2074 | || (bpi2->extra->vnc.import.aux_prefix.family == AF_ETHERNET | |
2075 | && (bpi2->extra->vnc.import.aux_prefix.prefixlen == 1))) { | |
d62a17ae | 2076 | |
2077 | /* | |
2078 | * wildcard aux address specified | |
2079 | */ | |
2080 | return 0; | |
2081 | } | |
2082 | ||
40381db7 DS |
2083 | return vnc_prefix_cmp(&bpi1->extra->vnc.import.aux_prefix, |
2084 | &bpi2->extra->vnc.import.aux_prefix); | |
65efcfce LB |
2085 | } |
2086 | ||
2087 | ||
2088 | /* | |
2089 | * Index on RD and Peer | |
2090 | */ | |
fe08ba7e | 2091 | static void rfapiItBiIndexAdd(struct agg_node *rn, /* Import table VPN node */ |
40381db7 | 2092 | struct bgp_path_info *bpi) /* new BPI */ |
65efcfce | 2093 | { |
d62a17ae | 2094 | struct skiplist *sl; |
2095 | ||
2096 | assert(rn); | |
40381db7 DS |
2097 | assert(bpi); |
2098 | assert(bpi->extra); | |
d62a17ae | 2099 | |
2100 | { | |
06b9f471 DS |
2101 | char buf[RD_ADDRSTRLEN]; |
2102 | ||
40381db7 DS |
2103 | vnc_zlog_debug_verbose("%s: bpi %p, peer %p, rd %s", __func__, |
2104 | bpi, bpi->peer, | |
2105 | prefix_rd2str(&bpi->extra->vnc.import.rd, | |
06b9f471 | 2106 | buf, sizeof(buf))); |
d62a17ae | 2107 | } |
2108 | ||
2109 | sl = RFAPI_RDINDEX_W_ALLOC(rn); | |
2110 | if (!sl) { | |
2111 | if (AF_ETHERNET == rn->p.family) { | |
2112 | sl = skiplist_new(0, rfapi_bi_peer_rd_aux_cmp, NULL); | |
2113 | } else { | |
2114 | sl = skiplist_new(0, rfapi_bi_peer_rd_cmp, NULL); | |
2115 | } | |
2116 | RFAPI_IT_EXTRA_GET(rn)->u.vpn.idx_rd = sl; | |
fe08ba7e | 2117 | agg_lock_node(rn); /* for skiplist */ |
d62a17ae | 2118 | } |
40381db7 | 2119 | assert(!skiplist_insert(sl, (void *)bpi, (void *)bpi)); |
fe08ba7e | 2120 | agg_lock_node(rn); /* for skiplist entry */ |
d62a17ae | 2121 | |
40381db7 | 2122 | /* NB: BPIs in import tables are not refcounted */ |
65efcfce LB |
2123 | } |
2124 | ||
fe08ba7e | 2125 | static void rfapiItBiIndexDump(struct agg_node *rn) |
65efcfce | 2126 | { |
d62a17ae | 2127 | struct skiplist *sl; |
2128 | void *cursor = NULL; | |
4b7e6066 DS |
2129 | struct bgp_path_info *k; |
2130 | struct bgp_path_info *v; | |
d62a17ae | 2131 | int rc; |
2132 | ||
2133 | sl = RFAPI_RDINDEX(rn); | |
2134 | if (!sl) | |
2135 | return; | |
2136 | ||
2137 | for (rc = skiplist_next(sl, (void **)&k, (void **)&v, &cursor); !rc; | |
2138 | rc = skiplist_next(sl, (void **)&k, (void **)&v, &cursor)) { | |
2139 | ||
06b9f471 | 2140 | char buf[RD_ADDRSTRLEN]; |
872ed4c7 | 2141 | char buf_aux_pfx[PREFIX_STRLEN]; |
d62a17ae | 2142 | |
06b9f471 | 2143 | prefix_rd2str(&k->extra->vnc.import.rd, buf, sizeof(buf)); |
d62a17ae | 2144 | if (k->extra->vnc.import.aux_prefix.family) { |
2145 | prefix2str(&k->extra->vnc.import.aux_prefix, | |
06b9f471 DS |
2146 | buf_aux_pfx, sizeof(buf_aux_pfx)); |
2147 | } else | |
9825c71e | 2148 | strlcpy(buf_aux_pfx, "(none)", sizeof(buf_aux_pfx)); |
d62a17ae | 2149 | |
40381db7 | 2150 | vnc_zlog_debug_verbose("bpi %p, peer %p, rd %s, aux_prefix %s", |
d62a17ae | 2151 | k, k->peer, buf, buf_aux_pfx); |
2152 | } | |
65efcfce LB |
2153 | } |
2154 | ||
4b7e6066 | 2155 | static struct bgp_path_info *rfapiItBiIndexSearch( |
fe08ba7e | 2156 | struct agg_node *rn, /* Import table VPN node */ |
d62a17ae | 2157 | struct prefix_rd *prd, struct peer *peer, |
2158 | struct prefix *aux_prefix) /* optional L3 addr for L2 ITs */ | |
65efcfce | 2159 | { |
d62a17ae | 2160 | struct skiplist *sl; |
2161 | int rc; | |
b8694ef4 DS |
2162 | struct bgp_path_info bpi_fake = {0}; |
2163 | struct bgp_path_info_extra bpi_extra = {0}; | |
40381db7 | 2164 | struct bgp_path_info *bpi_result; |
65efcfce | 2165 | |
d62a17ae | 2166 | sl = RFAPI_RDINDEX(rn); |
2167 | if (!sl) | |
2168 | return NULL; | |
65efcfce LB |
2169 | |
2170 | #if DEBUG_BI_SEARCH | |
d62a17ae | 2171 | { |
06b9f471 | 2172 | char buf[RD_ADDRSTRLEN]; |
872ed4c7 | 2173 | char buf_aux_pfx[PREFIX_STRLEN]; |
d62a17ae | 2174 | |
d62a17ae | 2175 | if (aux_prefix) { |
872ed4c7 DS |
2176 | prefix2str(aux_prefix, buf_aux_pfx, |
2177 | sizeof(buf_aux_pfx)); | |
06b9f471 | 2178 | } else |
9825c71e | 2179 | strlcpy(buf_aux_pfx, "(nil)", sizeof(buf_aux_pfx)); |
d62a17ae | 2180 | |
2181 | vnc_zlog_debug_verbose("%s want prd=%s, peer=%p, aux_prefix=%s", | |
06b9f471 DS |
2182 | __func__, |
2183 | prefix_rd2str(prd, buf, sizeof(buf)), | |
2184 | peer, buf_aux_pfx); | |
d62a17ae | 2185 | rfapiItBiIndexDump(rn); |
2186 | } | |
65efcfce LB |
2187 | #endif |
2188 | ||
d62a17ae | 2189 | /* threshold is a WAG */ |
2190 | if (sl->count < 3) { | |
65efcfce | 2191 | #if DEBUG_BI_SEARCH |
d62a17ae | 2192 | vnc_zlog_debug_verbose("%s: short list algorithm", __func__); |
65efcfce | 2193 | #endif |
d62a17ae | 2194 | /* if short list, linear search might be faster */ |
40381db7 DS |
2195 | for (bpi_result = rn->info; bpi_result; |
2196 | bpi_result = bpi_result->next) { | |
65efcfce | 2197 | #if DEBUG_BI_SEARCH |
d62a17ae | 2198 | { |
06b9f471 DS |
2199 | char buf[RD_ADDRSTRLEN]; |
2200 | ||
d62a17ae | 2201 | vnc_zlog_debug_verbose( |
40381db7 DS |
2202 | "%s: bpi has prd=%s, peer=%p", __func__, |
2203 | prefix_rd2str(&bpi_result->extra->vnc | |
996c9314 LB |
2204 | .import.rd, |
2205 | buf, sizeof(buf)), | |
40381db7 | 2206 | bpi_result->peer); |
d62a17ae | 2207 | } |
65efcfce | 2208 | #endif |
40381db7 DS |
2209 | if (peer == bpi_result->peer |
2210 | && !prefix_cmp((struct prefix *)&bpi_result->extra | |
d62a17ae | 2211 | ->vnc.import.rd, |
2212 | (struct prefix *)prd)) { | |
65efcfce LB |
2213 | |
2214 | #if DEBUG_BI_SEARCH | |
d62a17ae | 2215 | vnc_zlog_debug_verbose( |
2216 | "%s: peer and RD same, doing aux_prefix check", | |
2217 | __func__); | |
65efcfce | 2218 | #endif |
d62a17ae | 2219 | if (!aux_prefix |
40381db7 DS |
2220 | || !prefix_cmp( |
2221 | aux_prefix, | |
2222 | &bpi_result->extra->vnc.import | |
2223 | .aux_prefix)) { | |
65efcfce LB |
2224 | |
2225 | #if DEBUG_BI_SEARCH | |
d62a17ae | 2226 | vnc_zlog_debug_verbose("%s: match", |
2227 | __func__); | |
65efcfce | 2228 | #endif |
d62a17ae | 2229 | break; |
2230 | } | |
2231 | } | |
2232 | } | |
40381db7 | 2233 | return bpi_result; |
d62a17ae | 2234 | } |
2235 | ||
40381db7 DS |
2236 | bpi_fake.peer = peer; |
2237 | bpi_fake.extra = &bpi_extra; | |
2238 | bpi_fake.extra->vnc.import.rd = *(struct prefix_rd *)prd; | |
d62a17ae | 2239 | if (aux_prefix) { |
40381db7 | 2240 | bpi_fake.extra->vnc.import.aux_prefix = *aux_prefix; |
d62a17ae | 2241 | } else { |
2242 | /* wildcard */ | |
40381db7 DS |
2243 | bpi_fake.extra->vnc.import.aux_prefix.family = AF_ETHERNET; |
2244 | bpi_fake.extra->vnc.import.aux_prefix.prefixlen = 1; | |
d62a17ae | 2245 | } |
2246 | ||
40381db7 | 2247 | rc = skiplist_search(sl, (void *)&bpi_fake, (void *)&bpi_result); |
d62a17ae | 2248 | |
2249 | if (rc) { | |
65efcfce | 2250 | #if DEBUG_BI_SEARCH |
d62a17ae | 2251 | vnc_zlog_debug_verbose("%s: no match", __func__); |
65efcfce | 2252 | #endif |
d62a17ae | 2253 | return NULL; |
2254 | } | |
65efcfce LB |
2255 | |
2256 | #if DEBUG_BI_SEARCH | |
40381db7 | 2257 | vnc_zlog_debug_verbose("%s: matched bpi=%p", __func__, bpi_result); |
65efcfce LB |
2258 | #endif |
2259 | ||
40381db7 | 2260 | return bpi_result; |
65efcfce LB |
2261 | } |
2262 | ||
fe08ba7e | 2263 | static void rfapiItBiIndexDel(struct agg_node *rn, /* Import table VPN node */ |
40381db7 | 2264 | struct bgp_path_info *bpi) /* old BPI */ |
65efcfce | 2265 | { |
d62a17ae | 2266 | struct skiplist *sl; |
2267 | int rc; | |
65efcfce | 2268 | |
d62a17ae | 2269 | { |
06b9f471 DS |
2270 | char buf[RD_ADDRSTRLEN]; |
2271 | ||
40381db7 DS |
2272 | vnc_zlog_debug_verbose("%s: bpi %p, peer %p, rd %s", __func__, |
2273 | bpi, bpi->peer, | |
2274 | prefix_rd2str(&bpi->extra->vnc.import.rd, | |
06b9f471 | 2275 | buf, sizeof(buf))); |
d62a17ae | 2276 | } |
65efcfce | 2277 | |
d62a17ae | 2278 | sl = RFAPI_RDINDEX(rn); |
2279 | assert(sl); | |
65efcfce | 2280 | |
40381db7 | 2281 | rc = skiplist_delete(sl, (void *)(bpi), (void *)bpi); |
d62a17ae | 2282 | if (rc) { |
2283 | rfapiItBiIndexDump(rn); | |
2284 | } | |
2285 | assert(!rc); | |
65efcfce | 2286 | |
fe08ba7e | 2287 | agg_unlock_node(rn); /* for skiplist entry */ |
65efcfce | 2288 | |
40381db7 | 2289 | /* NB: BPIs in import tables are not refcounted */ |
65efcfce LB |
2290 | } |
2291 | ||
2292 | /* | |
2293 | * Add a backreference at the ENCAP node to the VPN route that | |
2294 | * refers to it | |
2295 | */ | |
4b7e6066 DS |
2296 | static void |
2297 | rfapiMonitorEncapAdd(struct rfapi_import_table *import_table, | |
40381db7 DS |
2298 | struct prefix *p, /* VN address */ |
2299 | struct agg_node *vpn_rn, /* VPN node */ | |
2300 | struct bgp_path_info *vpn_bpi) /* VPN bpi/route */ | |
65efcfce | 2301 | { |
d62a17ae | 2302 | afi_t afi = family2afi(p->family); |
fe08ba7e | 2303 | struct agg_node *rn; |
d62a17ae | 2304 | struct rfapi_monitor_encap *m; |
2305 | ||
2306 | assert(afi); | |
fe08ba7e | 2307 | rn = agg_node_get(import_table->imported_encap[afi], p); /* locks rn */ |
d62a17ae | 2308 | assert(rn); |
2309 | ||
2310 | m = XCALLOC(MTYPE_RFAPI_MONITOR_ENCAP, | |
2311 | sizeof(struct rfapi_monitor_encap)); | |
2312 | assert(m); | |
2313 | ||
2314 | m->node = vpn_rn; | |
40381db7 | 2315 | m->bpi = vpn_bpi; |
d62a17ae | 2316 | m->rn = rn; |
2317 | ||
2318 | /* insert to encap node's list */ | |
2319 | m->next = RFAPI_MONITOR_ENCAP(rn); | |
2320 | if (m->next) | |
2321 | m->next->prev = m; | |
2322 | RFAPI_MONITOR_ENCAP_W_ALLOC(rn) = m; | |
2323 | ||
2324 | /* for easy lookup when deleting vpn route */ | |
40381db7 | 2325 | vpn_bpi->extra->vnc.import.hme = m; |
d62a17ae | 2326 | |
2327 | vnc_zlog_debug_verbose( | |
40381db7 DS |
2328 | "%s: it=%p, vpn_bpi=%p, afi=%d, encap rn=%p, setting vpn_bpi->extra->vnc.import.hme=%p", |
2329 | __func__, import_table, vpn_bpi, afi, rn, m); | |
d62a17ae | 2330 | |
2331 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, 0); | |
40381db7 | 2332 | bgp_attr_intern(vpn_bpi->attr); |
65efcfce LB |
2333 | } |
2334 | ||
40381db7 | 2335 | static void rfapiMonitorEncapDelete(struct bgp_path_info *vpn_bpi) |
65efcfce | 2336 | { |
d62a17ae | 2337 | /* |
2338 | * Remove encap monitor | |
2339 | */ | |
40381db7 DS |
2340 | vnc_zlog_debug_verbose("%s: vpn_bpi=%p", __func__, vpn_bpi); |
2341 | if (vpn_bpi->extra) { | |
2342 | struct rfapi_monitor_encap *hme = | |
2343 | vpn_bpi->extra->vnc.import.hme; | |
d62a17ae | 2344 | |
2345 | if (hme) { | |
2346 | ||
2347 | vnc_zlog_debug_verbose("%s: hme=%p", __func__, hme); | |
2348 | ||
2349 | /* Refcount checking takes too long here */ | |
2350 | // RFAPI_CHECK_REFCOUNT(hme->rn, SAFI_ENCAP, 0); | |
2351 | if (hme->next) | |
2352 | hme->next->prev = hme->prev; | |
2353 | if (hme->prev) | |
2354 | hme->prev->next = hme->next; | |
2355 | else | |
2356 | RFAPI_MONITOR_ENCAP_W_ALLOC(hme->rn) = | |
2357 | hme->next; | |
2358 | /* Refcount checking takes too long here */ | |
2359 | // RFAPI_CHECK_REFCOUNT(hme->rn, SAFI_ENCAP, 1); | |
2360 | ||
2361 | /* see if the struct rfapi_it_extra is empty and can be | |
2362 | * freed */ | |
2363 | rfapiMonitorExtraPrune(SAFI_ENCAP, hme->rn); | |
2364 | ||
fe08ba7e | 2365 | agg_unlock_node(hme->rn); /* decr ref count */ |
d62a17ae | 2366 | XFREE(MTYPE_RFAPI_MONITOR_ENCAP, hme); |
40381db7 | 2367 | vpn_bpi->extra->vnc.import.hme = NULL; |
d62a17ae | 2368 | } |
2369 | } | |
65efcfce LB |
2370 | } |
2371 | ||
2372 | /* | |
2373 | * quagga lib/thread.h says this must return int even though | |
2374 | * it doesn't do anything with the return value | |
2375 | */ | |
d62a17ae | 2376 | static int rfapiWithdrawTimerVPN(struct thread *t) |
65efcfce | 2377 | { |
d62a17ae | 2378 | struct rfapi_withdraw *wcb = t->arg; |
40381db7 | 2379 | struct bgp_path_info *bpi = wcb->info; |
d62a17ae | 2380 | struct bgp *bgp = bgp_get_default(); |
2381 | ||
2382 | struct rfapi_monitor_vpn *moved; | |
2383 | afi_t afi; | |
2384 | ||
f4c713ae LB |
2385 | if (bgp == NULL) { |
2386 | vnc_zlog_debug_verbose( | |
2387 | "%s: NULL BGP pointer, assume shutdown race condition!!!", | |
2388 | __func__); | |
2389 | return 0; | |
2390 | } | |
2391 | if (bgp_flag_check(bgp, BGP_FLAG_DELETE_IN_PROGRESS)) { | |
2392 | vnc_zlog_debug_verbose( | |
2393 | "%s: BGP delete in progress, assume shutdown race condition!!!", | |
2394 | __func__); | |
2395 | return 0; | |
2396 | } | |
d62a17ae | 2397 | assert(wcb->node); |
40381db7 | 2398 | assert(bpi); |
d62a17ae | 2399 | assert(wcb->import_table); |
40381db7 | 2400 | assert(bpi->extra); |
d62a17ae | 2401 | |
2402 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_MPLS_VPN, wcb->lockoffset); | |
2403 | ||
2404 | { | |
2405 | char buf[BUFSIZ]; | |
2406 | ||
2407 | vnc_zlog_debug_verbose( | |
40381db7 | 2408 | "%s: removing bpi %p at prefix %s/%d", __func__, bpi, |
d62a17ae | 2409 | rfapi_ntop(wcb->node->p.family, &wcb->node->p.u.prefix, |
2410 | buf, BUFSIZ), | |
2411 | wcb->node->p.prefixlen); | |
2412 | } | |
2413 | ||
2414 | /* | |
2415 | * Remove the route (doubly-linked) | |
2416 | */ | |
40381db7 DS |
2417 | if (CHECK_FLAG(bpi->flags, BGP_PATH_VALID) |
2418 | && VALID_INTERIOR_TYPE(bpi->type)) | |
d62a17ae | 2419 | RFAPI_MONITOR_EXTERIOR(wcb->node)->valid_interior_count--; |
2420 | ||
2421 | afi = family2afi(wcb->node->p.family); | |
2422 | wcb->import_table->holddown_count[afi] -= 1; /* keep count consistent */ | |
40381db7 DS |
2423 | rfapiItBiIndexDel(wcb->node, bpi); |
2424 | rfapiBgpInfoDetach(wcb->node, bpi); /* with removed bpi */ | |
d62a17ae | 2425 | |
2426 | vnc_import_bgp_exterior_del_route_interior(bgp, wcb->import_table, | |
40381db7 | 2427 | wcb->node, bpi); |
d62a17ae | 2428 | |
2429 | ||
2430 | /* | |
2431 | * If VNC is configured to send response remove messages, AND | |
2432 | * if the removed route had a UN address, do response removal | |
2433 | * processing. | |
2434 | */ | |
2435 | if (!(bgp->rfapi_cfg->flags | |
2436 | & BGP_VNC_CONFIG_RESPONSE_REMOVAL_DISABLE)) { | |
2437 | ||
2438 | int has_valid_duplicate = 0; | |
40381db7 | 2439 | struct bgp_path_info *bpii; |
d62a17ae | 2440 | |
2441 | /* | |
2442 | * First check if there are any OTHER routes at this node | |
2443 | * that have the same nexthop and a valid UN address. If | |
2444 | * there are (e.g., from other peers), then the route isn't | |
2445 | * really gone, so skip sending a response removal message. | |
2446 | */ | |
40381db7 DS |
2447 | for (bpii = wcb->node->info; bpii; bpii = bpii->next) { |
2448 | if (rfapiVpnBiSamePtUn(bpi, bpii)) { | |
d62a17ae | 2449 | has_valid_duplicate = 1; |
2450 | break; | |
2451 | } | |
2452 | } | |
2453 | ||
2454 | vnc_zlog_debug_verbose("%s: has_valid_duplicate=%d", __func__, | |
2455 | has_valid_duplicate); | |
2456 | ||
2457 | if (!has_valid_duplicate) { | |
2458 | rfapiRibPendingDeleteRoute(bgp, wcb->import_table, afi, | |
2459 | wcb->node); | |
2460 | } | |
2461 | } | |
2462 | ||
40381db7 | 2463 | rfapiMonitorEncapDelete(bpi); |
d62a17ae | 2464 | |
2465 | /* | |
2466 | * If there are no VPN monitors at this VPN Node A, | |
2467 | * we are done | |
2468 | */ | |
2469 | if (!RFAPI_MONITOR_VPN(wcb->node)) { | |
2470 | vnc_zlog_debug_verbose("%s: no VPN monitors at this node", | |
2471 | __func__); | |
2472 | goto done; | |
2473 | } | |
2474 | ||
2475 | /* | |
2476 | * rfapiMonitorMoveShorter only moves monitors if there are | |
2477 | * no remaining valid routes at the current node | |
2478 | */ | |
2479 | moved = rfapiMonitorMoveShorter(wcb->node, 1); | |
2480 | ||
2481 | if (moved) { | |
2482 | rfapiMonitorMovedUp(wcb->import_table, wcb->node, moved->node, | |
2483 | moved); | |
2484 | } | |
65efcfce LB |
2485 | |
2486 | done: | |
d62a17ae | 2487 | /* |
40381db7 | 2488 | * Free VPN bpi |
d62a17ae | 2489 | */ |
40381db7 | 2490 | rfapiBgpInfoFree(bpi); |
d62a17ae | 2491 | wcb->info = NULL; |
2492 | ||
2493 | /* | |
2494 | * If route count at this node has gone to 0, withdraw exported prefix | |
2495 | */ | |
2496 | if (!wcb->node->info) { | |
2497 | /* see if the struct rfapi_it_extra is empty and can be freed */ | |
2498 | rfapiMonitorExtraPrune(SAFI_MPLS_VPN, wcb->node); | |
2499 | vnc_direct_bgp_del_prefix(bgp, wcb->import_table, wcb->node); | |
2500 | vnc_zebra_del_prefix(bgp, wcb->import_table, wcb->node); | |
2501 | } else { | |
2502 | /* | |
2503 | * nexthop change event | |
2504 | * vnc_direct_bgp_add_prefix() will recompute the VN addr | |
2505 | * ecommunity | |
2506 | */ | |
2507 | vnc_direct_bgp_add_prefix(bgp, wcb->import_table, wcb->node); | |
2508 | } | |
2509 | ||
2510 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_MPLS_VPN, 1 + wcb->lockoffset); | |
fe08ba7e | 2511 | agg_unlock_node(wcb->node); /* decr ref count */ |
d62a17ae | 2512 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); |
2513 | return 0; | |
65efcfce LB |
2514 | } |
2515 | ||
2516 | /* | |
2517 | * This works for multiprotocol extension, but not for plain ol' | |
2518 | * unicast IPv4 because that nexthop is stored in attr->nexthop | |
2519 | */ | |
d62a17ae | 2520 | void rfapiNexthop2Prefix(struct attr *attr, struct prefix *p) |
65efcfce | 2521 | { |
d62a17ae | 2522 | assert(p); |
2523 | assert(attr); | |
2524 | ||
2525 | memset(p, 0, sizeof(struct prefix)); | |
2526 | ||
2527 | switch (p->family = BGP_MP_NEXTHOP_FAMILY(attr->mp_nexthop_len)) { | |
2528 | case AF_INET: | |
2529 | p->u.prefix4 = attr->mp_nexthop_global_in; | |
2530 | p->prefixlen = 32; | |
2531 | break; | |
2532 | ||
2533 | case AF_INET6: | |
2534 | p->u.prefix6 = attr->mp_nexthop_global; | |
2535 | p->prefixlen = 128; | |
2536 | break; | |
2537 | ||
2538 | default: | |
2539 | vnc_zlog_debug_verbose("%s: Family is unknown = %d", __func__, | |
2540 | p->family); | |
2541 | } | |
65efcfce LB |
2542 | } |
2543 | ||
d62a17ae | 2544 | void rfapiUnicastNexthop2Prefix(afi_t afi, struct attr *attr, struct prefix *p) |
65efcfce | 2545 | { |
d62a17ae | 2546 | if (afi == AFI_IP) { |
2547 | p->family = AF_INET; | |
2548 | p->prefixlen = 32; | |
2549 | p->u.prefix4 = attr->nexthop; | |
2550 | } else { | |
2551 | rfapiNexthop2Prefix(attr, p); | |
2552 | } | |
65efcfce LB |
2553 | } |
2554 | ||
d62a17ae | 2555 | static int rfapiAttrNexthopAddrDifferent(struct prefix *p1, struct prefix *p2) |
65efcfce | 2556 | { |
d62a17ae | 2557 | if (!p1 || !p2) { |
2558 | vnc_zlog_debug_verbose("%s: p1 or p2 is NULL", __func__); | |
2559 | return 1; | |
2560 | } | |
2561 | ||
2562 | /* | |
2563 | * Are address families the same? | |
2564 | */ | |
2565 | if (p1->family != p2->family) { | |
2566 | return 1; | |
2567 | } | |
2568 | ||
2569 | switch (p1->family) { | |
2570 | case AF_INET: | |
2571 | if (IPV4_ADDR_SAME(&p1->u.prefix4, &p2->u.prefix4)) | |
2572 | return 0; | |
2573 | break; | |
2574 | ||
2575 | case AF_INET6: | |
2576 | if (IPV6_ADDR_SAME(&p1->u.prefix6, &p2->u.prefix6)) | |
2577 | return 0; | |
2578 | break; | |
2579 | ||
2580 | default: | |
2581 | assert(1); | |
2582 | } | |
2583 | ||
2584 | return 1; | |
65efcfce LB |
2585 | } |
2586 | ||
40381db7 DS |
2587 | static void rfapiCopyUnEncap2VPN(struct bgp_path_info *encap_bpi, |
2588 | struct bgp_path_info *vpn_bpi) | |
65efcfce | 2589 | { |
40381db7 DS |
2590 | if (!vpn_bpi || !vpn_bpi->extra) { |
2591 | zlog_warn("%s: no vpn bpi attr/extra, can't copy UN address", | |
d62a17ae | 2592 | __func__); |
2593 | return; | |
2594 | } | |
2595 | ||
40381db7 | 2596 | switch (BGP_MP_NEXTHOP_FAMILY(encap_bpi->attr->mp_nexthop_len)) { |
d62a17ae | 2597 | case AF_INET: |
2598 | ||
2599 | /* | |
2600 | * instrumentation to debug segfault of 091127 | |
2601 | */ | |
40381db7 DS |
2602 | vnc_zlog_debug_verbose("%s: vpn_bpi=%p", __func__, vpn_bpi); |
2603 | if (vpn_bpi) { | |
2604 | vnc_zlog_debug_verbose("%s: vpn_bpi->extra=%p", | |
2605 | __func__, vpn_bpi->extra); | |
d62a17ae | 2606 | } |
2607 | ||
40381db7 DS |
2608 | vpn_bpi->extra->vnc.import.un_family = AF_INET; |
2609 | vpn_bpi->extra->vnc.import.un.addr4 = | |
2610 | encap_bpi->attr->mp_nexthop_global_in; | |
d62a17ae | 2611 | break; |
2612 | ||
2613 | case AF_INET6: | |
40381db7 DS |
2614 | vpn_bpi->extra->vnc.import.un_family = AF_INET6; |
2615 | vpn_bpi->extra->vnc.import.un.addr6 = | |
2616 | encap_bpi->attr->mp_nexthop_global; | |
d62a17ae | 2617 | break; |
2618 | ||
2619 | default: | |
2620 | zlog_warn("%s: invalid encap nexthop length: %d", __func__, | |
40381db7 DS |
2621 | encap_bpi->attr->mp_nexthop_len); |
2622 | vpn_bpi->extra->vnc.import.un_family = 0; | |
d62a17ae | 2623 | break; |
2624 | } | |
65efcfce LB |
2625 | } |
2626 | ||
2627 | /* | |
2628 | * returns 0 on success, nonzero on error | |
2629 | */ | |
40381db7 DS |
2630 | static int |
2631 | rfapiWithdrawEncapUpdateCachedUn(struct rfapi_import_table *import_table, | |
2632 | struct bgp_path_info *encap_bpi, | |
2633 | struct agg_node *vpn_rn, | |
2634 | struct bgp_path_info *vpn_bpi) | |
65efcfce | 2635 | { |
40381db7 | 2636 | if (!encap_bpi) { |
d62a17ae | 2637 | |
2638 | /* | |
2639 | * clear cached UN address | |
2640 | */ | |
40381db7 | 2641 | if (!vpn_bpi || !vpn_bpi->extra) { |
d62a17ae | 2642 | zlog_warn( |
40381db7 | 2643 | "%s: missing VPN bpi/extra, can't clear UN addr", |
d62a17ae | 2644 | __func__); |
2645 | return 1; | |
2646 | } | |
40381db7 DS |
2647 | vpn_bpi->extra->vnc.import.un_family = 0; |
2648 | memset(&vpn_bpi->extra->vnc.import.un, 0, | |
2649 | sizeof(vpn_bpi->extra->vnc.import.un)); | |
2650 | if (CHECK_FLAG(vpn_bpi->flags, BGP_PATH_VALID)) { | |
2651 | if (rfapiGetVncTunnelUnAddr(vpn_bpi->attr, NULL)) { | |
2652 | UNSET_FLAG(vpn_bpi->flags, BGP_PATH_VALID); | |
2653 | if (VALID_INTERIOR_TYPE(vpn_bpi->type)) | |
d62a17ae | 2654 | RFAPI_MONITOR_EXTERIOR(vpn_rn) |
2655 | ->valid_interior_count--; | |
2656 | /* signal interior route withdrawal to | |
2657 | * import-exterior */ | |
2658 | vnc_import_bgp_exterior_del_route_interior( | |
2659 | bgp_get_default(), import_table, vpn_rn, | |
40381db7 | 2660 | vpn_bpi); |
d62a17ae | 2661 | } |
2662 | } | |
2663 | ||
2664 | } else { | |
40381db7 DS |
2665 | if (!vpn_bpi) { |
2666 | zlog_warn("%s: missing VPN bpi, can't clear UN addr", | |
d62a17ae | 2667 | __func__); |
2668 | return 1; | |
2669 | } | |
40381db7 DS |
2670 | rfapiCopyUnEncap2VPN(encap_bpi, vpn_bpi); |
2671 | if (!CHECK_FLAG(vpn_bpi->flags, BGP_PATH_VALID)) { | |
2672 | SET_FLAG(vpn_bpi->flags, BGP_PATH_VALID); | |
2673 | if (VALID_INTERIOR_TYPE(vpn_bpi->type)) | |
d62a17ae | 2674 | RFAPI_MONITOR_EXTERIOR(vpn_rn) |
2675 | ->valid_interior_count++; | |
2676 | /* signal interior route withdrawal to import-exterior | |
2677 | */ | |
2678 | vnc_import_bgp_exterior_add_route_interior( | |
2679 | bgp_get_default(), import_table, vpn_rn, | |
40381db7 | 2680 | vpn_bpi); |
d62a17ae | 2681 | } |
2682 | } | |
2683 | return 0; | |
65efcfce LB |
2684 | } |
2685 | ||
d62a17ae | 2686 | static int rfapiWithdrawTimerEncap(struct thread *t) |
65efcfce | 2687 | { |
d62a17ae | 2688 | struct rfapi_withdraw *wcb = t->arg; |
40381db7 | 2689 | struct bgp_path_info *bpi = wcb->info; |
d62a17ae | 2690 | int was_first_route = 0; |
2691 | struct rfapi_monitor_encap *em; | |
2692 | struct skiplist *vpn_node_sl = skiplist_new(0, NULL, NULL); | |
2693 | ||
2694 | assert(wcb->node); | |
40381db7 | 2695 | assert(bpi); |
d62a17ae | 2696 | assert(wcb->import_table); |
2697 | ||
2698 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_ENCAP, 0); | |
2699 | ||
40381db7 | 2700 | if (wcb->node->info == bpi) |
d62a17ae | 2701 | was_first_route = 1; |
2702 | ||
2703 | /* | |
40381db7 | 2704 | * Remove the route/bpi and free it |
d62a17ae | 2705 | */ |
40381db7 DS |
2706 | rfapiBgpInfoDetach(wcb->node, bpi); |
2707 | rfapiBgpInfoFree(bpi); | |
d62a17ae | 2708 | |
2709 | if (!was_first_route) | |
2710 | goto done; | |
2711 | ||
2712 | for (em = RFAPI_MONITOR_ENCAP(wcb->node); em; em = em->next) { | |
2713 | ||
2714 | /* | |
40381db7 DS |
2715 | * Update monitoring VPN BPIs with new encap info at the |
2716 | * head of the encap bpi chain (which could be NULL after | |
2717 | * removing the expiring bpi above) | |
d62a17ae | 2718 | */ |
2719 | if (rfapiWithdrawEncapUpdateCachedUn(wcb->import_table, | |
2720 | wcb->node->info, em->node, | |
40381db7 | 2721 | em->bpi)) |
d62a17ae | 2722 | continue; |
2723 | ||
2724 | /* | |
2725 | * Build a list of unique VPN nodes referenced by these | |
2726 | * monitors. | |
2727 | * Use a skiplist for speed. | |
2728 | */ | |
2729 | skiplist_insert(vpn_node_sl, em->node, em->node); | |
2730 | } | |
2731 | ||
2732 | ||
2733 | /* | |
2734 | * for each VPN node referenced in the ENCAP monitors: | |
2735 | */ | |
fe08ba7e | 2736 | struct agg_node *rn; |
d62a17ae | 2737 | while (!skiplist_first(vpn_node_sl, (void **)&rn, NULL)) { |
2738 | if (!wcb->node->info) { | |
2739 | struct rfapi_monitor_vpn *moved; | |
2740 | ||
2741 | moved = rfapiMonitorMoveShorter(rn, 0); | |
2742 | if (moved) { | |
2743 | // rfapiDoRouteCallback(wcb->import_table, | |
2744 | // moved->node, moved); | |
2745 | rfapiMonitorMovedUp(wcb->import_table, rn, | |
2746 | moved->node, moved); | |
2747 | } | |
2748 | } else { | |
2749 | // rfapiDoRouteCallback(wcb->import_table, rn, NULL); | |
2750 | rfapiMonitorItNodeChanged(wcb->import_table, rn, NULL); | |
2751 | } | |
2752 | skiplist_delete_first(vpn_node_sl); | |
2753 | } | |
65efcfce LB |
2754 | |
2755 | done: | |
d62a17ae | 2756 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_ENCAP, 1); |
fe08ba7e | 2757 | agg_unlock_node(wcb->node); /* decr ref count */ |
d62a17ae | 2758 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); |
2759 | skiplist_free(vpn_node_sl); | |
2760 | return 0; | |
65efcfce LB |
2761 | } |
2762 | ||
2763 | ||
2764 | /* | |
2765 | * Works for both VPN and ENCAP routes; timer_service_func is different | |
2766 | * in each case | |
2767 | */ | |
2768 | static void | |
d62a17ae | 2769 | rfapiBiStartWithdrawTimer(struct rfapi_import_table *import_table, |
40381db7 | 2770 | struct agg_node *rn, struct bgp_path_info *bpi, |
4b7e6066 | 2771 | afi_t afi, safi_t safi, |
d62a17ae | 2772 | int (*timer_service_func)(struct thread *)) |
65efcfce | 2773 | { |
d62a17ae | 2774 | uint32_t lifetime; |
2775 | struct rfapi_withdraw *wcb; | |
2776 | ||
40381db7 | 2777 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
a8fd6fde QY |
2778 | /* |
2779 | * Already on the path to being withdrawn, | |
2780 | * should already have a timer set up to | |
2781 | * delete it. | |
2782 | */ | |
2783 | vnc_zlog_debug_verbose( | |
2784 | "%s: already being withdrawn, do nothing", __func__); | |
2785 | return; | |
2786 | } | |
d62a17ae | 2787 | |
40381db7 | 2788 | rfapiGetVncLifetime(bpi->attr, &lifetime); |
d62a17ae | 2789 | vnc_zlog_debug_verbose("%s: VNC lifetime is %u", __func__, lifetime); |
2790 | ||
2791 | /* | |
2792 | * withdrawn routes get to hang around for a while | |
2793 | */ | |
40381db7 | 2794 | SET_FLAG(bpi->flags, BGP_PATH_REMOVED); |
d62a17ae | 2795 | |
2796 | /* set timer to remove the route later */ | |
2797 | lifetime = rfapiGetHolddownFromLifetime(lifetime); | |
2798 | vnc_zlog_debug_verbose("%s: using timeout %u", __func__, lifetime); | |
2799 | ||
2800 | /* | |
2801 | * Stash import_table, node, and info for use by timer | |
2802 | * service routine, which is supposed to free the wcb. | |
2803 | */ | |
2804 | wcb = XCALLOC(MTYPE_RFAPI_WITHDRAW, sizeof(struct rfapi_withdraw)); | |
2805 | assert(wcb); | |
2806 | wcb->node = rn; | |
40381db7 | 2807 | wcb->info = bpi; |
d62a17ae | 2808 | wcb->import_table = import_table; |
40381db7 | 2809 | bgp_attr_intern(bpi->attr); |
d62a17ae | 2810 | |
2811 | if (VNC_DEBUG(VERBOSE)) { | |
2812 | vnc_zlog_debug_verbose( | |
40381db7 | 2813 | "%s: wcb values: node=%p, info=%p, import_table=%p (bpi follows)", |
d62a17ae | 2814 | __func__, wcb->node, wcb->info, wcb->import_table); |
40381db7 | 2815 | rfapiPrintBi(NULL, bpi); |
d62a17ae | 2816 | } |
2817 | ||
2818 | ||
40381db7 | 2819 | assert(bpi->extra); |
d62a17ae | 2820 | if (lifetime > UINT32_MAX / 1001) { |
2821 | /* sub-optimal case, but will probably never happen */ | |
40381db7 | 2822 | bpi->extra->vnc.import.timer = NULL; |
d62a17ae | 2823 | thread_add_timer(bm->master, timer_service_func, wcb, lifetime, |
40381db7 | 2824 | &bpi->extra->vnc.import.timer); |
d62a17ae | 2825 | } else { |
2826 | static uint32_t jitter; | |
2827 | uint32_t lifetime_msec; | |
2828 | ||
2829 | /* | |
2830 | * the goal here is to spread out the timers so they are | |
2831 | * sortable in the skip list | |
2832 | */ | |
2833 | if (++jitter >= 1000) | |
2834 | jitter = 0; | |
2835 | ||
2836 | lifetime_msec = (lifetime * 1000) + jitter; | |
2837 | ||
40381db7 | 2838 | bpi->extra->vnc.import.timer = NULL; |
d62a17ae | 2839 | thread_add_timer_msec(bm->master, timer_service_func, wcb, |
2840 | lifetime_msec, | |
40381db7 | 2841 | &bpi->extra->vnc.import.timer); |
d62a17ae | 2842 | } |
2843 | ||
1defdda8 | 2844 | /* re-sort route list (BGP_PATH_REMOVED routes are last) */ |
4b7e6066 | 2845 | if (((struct bgp_path_info *)rn->info)->next) { |
40381db7 DS |
2846 | rfapiBgpInfoDetach(rn, bpi); |
2847 | rfapiBgpInfoAttachSorted(rn, bpi, afi, safi); | |
d62a17ae | 2848 | } |
65efcfce LB |
2849 | } |
2850 | ||
2851 | ||
d62a17ae | 2852 | typedef void(rfapi_bi_filtered_import_f)(struct rfapi_import_table *, int, |
2853 | struct peer *, void *, struct prefix *, | |
2854 | struct prefix *, afi_t, | |
2855 | struct prefix_rd *, struct attr *, | |
d7c0a89a | 2856 | uint8_t, uint8_t, uint32_t *); |
65efcfce LB |
2857 | |
2858 | ||
d62a17ae | 2859 | static void rfapiExpireEncapNow(struct rfapi_import_table *it, |
40381db7 | 2860 | struct agg_node *rn, struct bgp_path_info *bpi) |
65efcfce | 2861 | { |
d62a17ae | 2862 | struct rfapi_withdraw *wcb; |
2863 | struct thread t; | |
2864 | ||
2865 | /* | |
2866 | * pretend we're an expiring timer | |
2867 | */ | |
2868 | wcb = XCALLOC(MTYPE_RFAPI_WITHDRAW, sizeof(struct rfapi_withdraw)); | |
40381db7 | 2869 | wcb->info = bpi; |
d62a17ae | 2870 | wcb->node = rn; |
2871 | wcb->import_table = it; | |
2872 | memset(&t, 0, sizeof(t)); | |
2873 | t.arg = wcb; | |
2874 | rfapiWithdrawTimerEncap(&t); /* frees wcb */ | |
65efcfce LB |
2875 | } |
2876 | ||
d62a17ae | 2877 | static int rfapiGetNexthop(struct attr *attr, struct prefix *prefix) |
65efcfce | 2878 | { |
d62a17ae | 2879 | switch (BGP_MP_NEXTHOP_FAMILY(attr->mp_nexthop_len)) { |
2880 | case AF_INET: | |
2881 | prefix->family = AF_INET; | |
2882 | prefix->prefixlen = 32; | |
2883 | prefix->u.prefix4 = attr->mp_nexthop_global_in; | |
2884 | break; | |
2885 | case AF_INET6: | |
2886 | prefix->family = AF_INET6; | |
2887 | prefix->prefixlen = 128; | |
2888 | prefix->u.prefix6 = attr->mp_nexthop_global; | |
2889 | break; | |
2890 | default: | |
2891 | vnc_zlog_debug_verbose("%s: unknown attr->mp_nexthop_len %d", | |
2892 | __func__, attr->mp_nexthop_len); | |
2893 | return EINVAL; | |
2894 | } | |
2895 | return 0; | |
65efcfce LB |
2896 | } |
2897 | ||
d62a17ae | 2898 | /* |
9b6d8fcf | 2899 | * import a bgp_path_info if its route target list intersects with the |
65efcfce LB |
2900 | * import table's route target list |
2901 | */ | |
d62a17ae | 2902 | static void rfapiBgpInfoFilteredImportEncap( |
2903 | struct rfapi_import_table *import_table, int action, struct peer *peer, | |
2904 | void *rfd, /* set for looped back routes */ | |
2905 | struct prefix *p, | |
2906 | struct prefix *aux_prefix, /* Unused for encap routes */ | |
2907 | afi_t afi, struct prefix_rd *prd, | |
9b6d8fcf DS |
2908 | struct attr *attr, /* part of bgp_path_info */ |
2909 | uint8_t type, /* part of bgp_path_info */ | |
2910 | uint8_t sub_type, /* part of bgp_path_info */ | |
2911 | uint32_t *label) /* part of bgp_path_info */ | |
65efcfce | 2912 | { |
fe08ba7e DS |
2913 | struct agg_table *rt = NULL; |
2914 | struct agg_node *rn; | |
4b7e6066 | 2915 | struct bgp_path_info *info_new; |
40381db7 | 2916 | struct bgp_path_info *bpi; |
4b7e6066 | 2917 | struct bgp_path_info *next; |
d62a17ae | 2918 | char buf[BUFSIZ]; |
2919 | ||
40381db7 DS |
2920 | struct prefix p_firstbpi_old; |
2921 | struct prefix p_firstbpi_new; | |
d62a17ae | 2922 | int replacing = 0; |
2923 | const char *action_str = NULL; | |
2924 | struct prefix un_prefix; | |
2925 | ||
2926 | struct bgp *bgp; | |
2927 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
2928 | ||
2929 | switch (action) { | |
2930 | case FIF_ACTION_UPDATE: | |
2931 | action_str = "update"; | |
2932 | break; | |
2933 | case FIF_ACTION_WITHDRAW: | |
2934 | action_str = "withdraw"; | |
2935 | break; | |
2936 | case FIF_ACTION_KILL: | |
2937 | action_str = "kill"; | |
2938 | break; | |
2939 | default: | |
2940 | assert(0); | |
2941 | break; | |
2942 | } | |
2943 | ||
2944 | vnc_zlog_debug_verbose( | |
2945 | "%s: entry: %s: prefix %s/%d", __func__, action_str, | |
2946 | inet_ntop(p->family, &p->u.prefix, buf, BUFSIZ), p->prefixlen); | |
2947 | ||
40381db7 DS |
2948 | memset(&p_firstbpi_old, 0, sizeof(p_firstbpi_old)); |
2949 | memset(&p_firstbpi_new, 0, sizeof(p_firstbpi_new)); | |
d62a17ae | 2950 | |
2951 | if (action == FIF_ACTION_UPDATE) { | |
2952 | /* | |
2953 | * Compare rt lists. If no intersection, don't import this route | |
2954 | * On a withdraw, peer and RD are sufficient to determine if | |
2955 | * we should act. | |
2956 | */ | |
2957 | if (!attr || !attr->ecommunity) { | |
2958 | ||
2959 | vnc_zlog_debug_verbose( | |
2960 | "%s: attr, extra, or ecommunity missing, not importing", | |
2961 | __func__); | |
2962 | return; | |
2963 | } | |
65efcfce | 2964 | #if RFAPI_REQUIRE_ENCAP_BEEC |
d62a17ae | 2965 | if (!rfapiEcommunitiesMatchBeec(attr->ecommunity)) { |
2966 | vnc_zlog_debug_verbose( | |
2967 | "%s: it=%p: no match for BGP Encapsulation ecommunity", | |
2968 | __func__, import_table); | |
2969 | return; | |
2970 | } | |
65efcfce | 2971 | #endif |
d62a17ae | 2972 | if (!rfapiEcommunitiesIntersect(import_table->rt_import_list, |
2973 | attr->ecommunity)) { | |
2974 | ||
2975 | vnc_zlog_debug_verbose( | |
2976 | "%s: it=%p: no ecommunity intersection", | |
2977 | __func__, import_table); | |
2978 | return; | |
2979 | } | |
2980 | ||
2981 | /* | |
2982 | * Updates must also have a nexthop address | |
2983 | */ | |
2984 | memset(&un_prefix, 0, | |
2985 | sizeof(un_prefix)); /* keep valgrind happy */ | |
2986 | if (rfapiGetNexthop(attr, &un_prefix)) { | |
2987 | vnc_zlog_debug_verbose("%s: missing nexthop address", | |
2988 | __func__); | |
2989 | return; | |
2990 | } | |
2991 | } | |
2992 | ||
2993 | /* | |
2994 | * Figure out which radix tree the route would go into | |
2995 | */ | |
2996 | switch (afi) { | |
2997 | case AFI_IP: | |
2998 | case AFI_IP6: | |
2999 | rt = import_table->imported_encap[afi]; | |
3000 | break; | |
3001 | ||
3002 | default: | |
450971aa | 3003 | flog_err(EC_LIB_DEVELOPMENT, "%s: bad afi %d", __func__, afi); |
d62a17ae | 3004 | return; |
3005 | } | |
3006 | ||
3007 | /* | |
fe08ba7e | 3008 | * agg_node_lookup returns a node only if there is at least |
d62a17ae | 3009 | * one route attached. |
3010 | */ | |
fe08ba7e | 3011 | rn = agg_node_lookup(rt, p); |
65efcfce LB |
3012 | |
3013 | #if DEBUG_ENCAP_MONITOR | |
d62a17ae | 3014 | vnc_zlog_debug_verbose("%s: initial encap lookup(it=%p) rn=%p", |
3015 | __func__, import_table, rn); | |
65efcfce LB |
3016 | #endif |
3017 | ||
d62a17ae | 3018 | if (rn) { |
3019 | ||
3020 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, 1); | |
fe08ba7e | 3021 | agg_unlock_node(rn); /* undo lock in agg_node_lookup */ |
d62a17ae | 3022 | |
3023 | ||
3024 | /* | |
40381db7 | 3025 | * capture nexthop of first bpi |
d62a17ae | 3026 | */ |
3027 | if (rn->info) { | |
3028 | rfapiNexthop2Prefix( | |
4b7e6066 | 3029 | ((struct bgp_path_info *)(rn->info))->attr, |
40381db7 | 3030 | &p_firstbpi_old); |
d62a17ae | 3031 | } |
3032 | ||
40381db7 | 3033 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 3034 | |
3035 | /* | |
9b6d8fcf | 3036 | * Does this bgp_path_info refer to the same route |
d62a17ae | 3037 | * as we are trying to add? |
3038 | */ | |
40381db7 DS |
3039 | vnc_zlog_debug_verbose("%s: comparing BPI %p", __func__, |
3040 | bpi); | |
d62a17ae | 3041 | |
3042 | ||
3043 | /* | |
3044 | * Compare RDs | |
3045 | * | |
40381db7 DS |
3046 | * RD of import table bpi is in |
3047 | * bpi->extra->vnc.import.rd RD of info_orig is in prd | |
d62a17ae | 3048 | */ |
40381db7 DS |
3049 | if (!bpi->extra) { |
3050 | vnc_zlog_debug_verbose("%s: no bpi->extra", | |
d62a17ae | 3051 | __func__); |
3052 | continue; | |
3053 | } | |
3054 | if (prefix_cmp( | |
40381db7 | 3055 | (struct prefix *)&bpi->extra->vnc.import.rd, |
d62a17ae | 3056 | (struct prefix *)prd)) { |
3057 | ||
3058 | vnc_zlog_debug_verbose("%s: prd does not match", | |
3059 | __func__); | |
3060 | continue; | |
3061 | } | |
3062 | ||
3063 | /* | |
3064 | * Compare peers | |
3065 | */ | |
40381db7 | 3066 | if (bpi->peer != peer) { |
d62a17ae | 3067 | vnc_zlog_debug_verbose( |
3068 | "%s: peer does not match", __func__); | |
3069 | continue; | |
3070 | } | |
3071 | ||
40381db7 | 3072 | vnc_zlog_debug_verbose("%s: found matching bpi", |
d62a17ae | 3073 | __func__); |
3074 | ||
40381db7 | 3075 | /* Same route. Delete this bpi, replace with new one */ |
d62a17ae | 3076 | |
3077 | if (action == FIF_ACTION_WITHDRAW) { | |
3078 | ||
3079 | vnc_zlog_debug_verbose( | |
3080 | "%s: withdrawing at prefix %s/%d", | |
3081 | __func__, | |
3082 | inet_ntop(rn->p.family, &rn->p.u.prefix, | |
3083 | buf, BUFSIZ), | |
3084 | rn->p.prefixlen); | |
3085 | ||
3086 | rfapiBiStartWithdrawTimer( | |
40381db7 | 3087 | import_table, rn, bpi, afi, SAFI_ENCAP, |
d62a17ae | 3088 | rfapiWithdrawTimerEncap); |
3089 | ||
3090 | } else { | |
3091 | vnc_zlog_debug_verbose( | |
3092 | "%s: %s at prefix %s/%d", __func__, | |
3093 | ((action == FIF_ACTION_KILL) | |
3094 | ? "killing" | |
3095 | : "replacing"), | |
3096 | inet_ntop(rn->p.family, &rn->p.u.prefix, | |
3097 | buf, BUFSIZ), | |
3098 | rn->p.prefixlen); | |
3099 | ||
3100 | /* | |
3101 | * If this route is waiting to be deleted | |
3102 | * because of | |
3103 | * a previous withdraw, we must cancel its | |
3104 | * timer. | |
3105 | */ | |
40381db7 DS |
3106 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
3107 | && bpi->extra->vnc.import.timer) { | |
d62a17ae | 3108 | |
3109 | struct thread *t = | |
40381db7 | 3110 | (struct thread *)bpi->extra->vnc |
d62a17ae | 3111 | .import.timer; |
3112 | struct rfapi_withdraw *wcb = t->arg; | |
3113 | ||
3114 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
3115 | thread_cancel(t); | |
3116 | } | |
3117 | ||
3118 | if (action == FIF_ACTION_UPDATE) { | |
40381db7 DS |
3119 | rfapiBgpInfoDetach(rn, bpi); |
3120 | rfapiBgpInfoFree(bpi); | |
d62a17ae | 3121 | replacing = 1; |
3122 | } else { | |
3123 | /* | |
3124 | * Kill: do export stuff when removing | |
40381db7 | 3125 | * bpi |
d62a17ae | 3126 | */ |
3127 | struct rfapi_withdraw *wcb; | |
3128 | struct thread t; | |
3129 | ||
3130 | /* | |
3131 | * pretend we're an expiring timer | |
3132 | */ | |
3133 | wcb = XCALLOC( | |
3134 | MTYPE_RFAPI_WITHDRAW, | |
3135 | sizeof(struct rfapi_withdraw)); | |
40381db7 | 3136 | wcb->info = bpi; |
d62a17ae | 3137 | wcb->node = rn; |
3138 | wcb->import_table = import_table; | |
3139 | memset(&t, 0, sizeof(t)); | |
3140 | t.arg = wcb; | |
3141 | rfapiWithdrawTimerEncap( | |
3142 | &t); /* frees wcb */ | |
3143 | } | |
3144 | } | |
3145 | ||
3146 | break; | |
3147 | } | |
3148 | } | |
3149 | ||
3150 | if (rn) | |
3151 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, replacing ? 1 : 0); | |
3152 | ||
3153 | if (action == FIF_ACTION_WITHDRAW || action == FIF_ACTION_KILL) | |
3154 | return; | |
3155 | ||
3156 | info_new = | |
3157 | rfapiBgpInfoCreate(attr, peer, rfd, prd, type, sub_type, NULL); | |
3158 | ||
3159 | if (rn) { | |
3160 | if (!replacing) | |
40381db7 | 3161 | agg_lock_node(rn); /* incr ref count for new BPI */ |
d62a17ae | 3162 | } else { |
fe08ba7e | 3163 | rn = agg_node_get(rt, p); |
d62a17ae | 3164 | } |
3165 | ||
3166 | vnc_zlog_debug_verbose( | |
3167 | "%s: (afi=%d, rn=%p) inserting at prefix %s/%d", __func__, afi, | |
3168 | rn, inet_ntop(rn->p.family, &rn->p.u.prefix, buf, BUFSIZ), | |
3169 | rn->p.prefixlen); | |
3170 | ||
3171 | rfapiBgpInfoAttachSorted(rn, info_new, afi, SAFI_ENCAP); | |
3172 | ||
3173 | /* | |
3174 | * Delete holddown routes from same NVE. See details in | |
3175 | * rfapiBgpInfoFilteredImportVPN() | |
3176 | */ | |
40381db7 | 3177 | for (bpi = info_new->next; bpi; bpi = next) { |
d62a17ae | 3178 | |
3179 | struct prefix pfx_un; | |
3180 | int un_match = 0; | |
3181 | ||
40381db7 DS |
3182 | next = bpi->next; |
3183 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) | |
d62a17ae | 3184 | continue; |
3185 | ||
3186 | /* | |
3187 | * We already match the VN address (it is the prefix | |
3188 | * of the route node) | |
3189 | */ | |
3190 | ||
40381db7 | 3191 | if (!rfapiGetNexthop(bpi->attr, &pfx_un) |
d62a17ae | 3192 | && prefix_same(&pfx_un, &un_prefix)) { |
3193 | ||
3194 | un_match = 1; | |
3195 | } | |
3196 | ||
3197 | if (!un_match) | |
3198 | continue; | |
3199 | ||
3200 | vnc_zlog_debug_verbose( | |
40381db7 | 3201 | "%s: removing holddown bpi matching NVE of new route", |
d62a17ae | 3202 | __func__); |
40381db7 | 3203 | if (bpi->extra->vnc.import.timer) { |
d62a17ae | 3204 | struct thread *t = |
40381db7 | 3205 | (struct thread *)bpi->extra->vnc.import.timer; |
d62a17ae | 3206 | struct rfapi_withdraw *wcb = t->arg; |
3207 | ||
3208 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
3209 | thread_cancel(t); | |
3210 | } | |
40381db7 | 3211 | rfapiExpireEncapNow(import_table, rn, bpi); |
d62a17ae | 3212 | } |
3213 | ||
4b7e6066 | 3214 | rfapiNexthop2Prefix(((struct bgp_path_info *)(rn->info))->attr, |
40381db7 | 3215 | &p_firstbpi_new); |
d62a17ae | 3216 | |
3217 | /* | |
3218 | * If the nexthop address of the selected Encap route (i.e., | |
3219 | * the UN address) has changed, then we must update the VPN | |
3220 | * routes that refer to this Encap route and possibly force | |
3221 | * rfapi callbacks. | |
3222 | */ | |
40381db7 | 3223 | if (rfapiAttrNexthopAddrDifferent(&p_firstbpi_old, &p_firstbpi_new)) { |
d62a17ae | 3224 | |
3225 | struct rfapi_monitor_encap *m; | |
3226 | struct rfapi_monitor_encap *mnext; | |
3227 | ||
fe08ba7e | 3228 | struct agg_node *referenced_vpn_prefix; |
d62a17ae | 3229 | |
3230 | /* | |
3231 | * Optimized approach: build radix tree on the fly to | |
3232 | * hold list of VPN nodes referenced by the ENCAP monitors | |
3233 | * | |
3234 | * The nodes in this table correspond to prefixes of VPN routes. | |
3235 | * The "info" pointer of the node points to a chain of | |
3236 | * struct rfapi_monitor_encap, each of which refers to a | |
3237 | * specific VPN node. | |
3238 | */ | |
fe08ba7e | 3239 | struct agg_table *referenced_vpn_table; |
d62a17ae | 3240 | |
fe08ba7e | 3241 | referenced_vpn_table = agg_table_init(); |
d62a17ae | 3242 | assert(referenced_vpn_table); |
3243 | ||
3244 | /* | |
3245 | * iterate over the set of monitors at this ENCAP node. | |
3246 | */ | |
65efcfce | 3247 | #if DEBUG_ENCAP_MONITOR |
d62a17ae | 3248 | vnc_zlog_debug_verbose("%s: examining monitors at rn=%p", |
3249 | __func__, rn); | |
65efcfce | 3250 | #endif |
d62a17ae | 3251 | for (m = RFAPI_MONITOR_ENCAP(rn); m; m = m->next) { |
3252 | ||
3253 | /* | |
40381db7 | 3254 | * For each referenced bpi/route, copy the ENCAP route's |
d62a17ae | 3255 | * nexthop to the VPN route's cached UN address field |
3256 | * and set | |
3257 | * the address family of the cached UN address field. | |
3258 | */ | |
40381db7 DS |
3259 | rfapiCopyUnEncap2VPN(info_new, m->bpi); |
3260 | if (!CHECK_FLAG(m->bpi->flags, BGP_PATH_VALID)) { | |
3261 | SET_FLAG(m->bpi->flags, BGP_PATH_VALID); | |
3262 | if (VALID_INTERIOR_TYPE(m->bpi->type)) | |
d62a17ae | 3263 | RFAPI_MONITOR_EXTERIOR(m->node) |
3264 | ->valid_interior_count++; | |
3265 | vnc_import_bgp_exterior_add_route_interior( | |
40381db7 | 3266 | bgp, import_table, m->node, m->bpi); |
d62a17ae | 3267 | } |
3268 | ||
3269 | /* | |
3270 | * Build a list of unique VPN nodes referenced by these | |
3271 | * monitors | |
3272 | * | |
3273 | * There could be more than one VPN node here with a | |
3274 | * given | |
3275 | * prefix. Those are currently in an unsorted linear | |
3276 | * list | |
3277 | * per prefix. | |
3278 | */ | |
3279 | ||
fe08ba7e DS |
3280 | referenced_vpn_prefix = |
3281 | agg_node_get(referenced_vpn_table, &m->node->p); | |
d62a17ae | 3282 | assert(referenced_vpn_prefix); |
3283 | for (mnext = referenced_vpn_prefix->info; mnext; | |
3284 | mnext = mnext->next) { | |
3285 | ||
3286 | if (mnext->node == m->node) | |
3287 | break; | |
3288 | } | |
3289 | ||
3290 | if (mnext) { | |
3291 | /* | |
3292 | * already have an entry for this VPN node | |
3293 | */ | |
fe08ba7e | 3294 | agg_unlock_node(referenced_vpn_prefix); |
d62a17ae | 3295 | } else { |
3296 | mnext = XCALLOC( | |
3297 | MTYPE_RFAPI_MONITOR_ENCAP, | |
3298 | sizeof(struct rfapi_monitor_encap)); | |
3299 | assert(mnext); | |
3300 | mnext->node = m->node; | |
3301 | mnext->next = referenced_vpn_prefix->info; | |
3302 | referenced_vpn_prefix->info = mnext; | |
3303 | } | |
3304 | } | |
3305 | ||
3306 | /* | |
3307 | * for each VPN node referenced in the ENCAP monitors: | |
3308 | */ | |
fe08ba7e DS |
3309 | for (referenced_vpn_prefix = |
3310 | agg_route_top(referenced_vpn_table); | |
3311 | referenced_vpn_prefix; | |
3312 | referenced_vpn_prefix = | |
3313 | agg_route_next(referenced_vpn_prefix)) { | |
d62a17ae | 3314 | |
3315 | while ((m = referenced_vpn_prefix->info)) { | |
3316 | ||
fe08ba7e | 3317 | struct agg_node *n; |
d62a17ae | 3318 | |
3319 | rfapiMonitorMoveLonger(m->node); | |
fe08ba7e | 3320 | for (n = m->node; n; n = agg_node_parent(n)) { |
d62a17ae | 3321 | // rfapiDoRouteCallback(import_table, n, |
3322 | // NULL); | |
3323 | } | |
3324 | rfapiMonitorItNodeChanged(import_table, m->node, | |
3325 | NULL); | |
3326 | ||
3327 | referenced_vpn_prefix->info = m->next; | |
fe08ba7e | 3328 | agg_unlock_node(referenced_vpn_prefix); |
d62a17ae | 3329 | XFREE(MTYPE_RFAPI_MONITOR_ENCAP, m); |
3330 | } | |
3331 | } | |
fe08ba7e | 3332 | agg_table_finish(referenced_vpn_table); |
d62a17ae | 3333 | } |
3334 | ||
3335 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, 0); | |
65efcfce LB |
3336 | } |
3337 | ||
d62a17ae | 3338 | static void rfapiExpireVpnNow(struct rfapi_import_table *it, |
40381db7 | 3339 | struct agg_node *rn, struct bgp_path_info *bpi, |
d62a17ae | 3340 | int lockoffset) |
65efcfce | 3341 | { |
d62a17ae | 3342 | struct rfapi_withdraw *wcb; |
3343 | struct thread t; | |
3344 | ||
3345 | /* | |
3346 | * pretend we're an expiring timer | |
3347 | */ | |
3348 | wcb = XCALLOC(MTYPE_RFAPI_WITHDRAW, sizeof(struct rfapi_withdraw)); | |
40381db7 | 3349 | wcb->info = bpi; |
d62a17ae | 3350 | wcb->node = rn; |
3351 | wcb->import_table = it; | |
3352 | wcb->lockoffset = lockoffset; | |
3353 | memset(&t, 0, sizeof(t)); | |
3354 | t.arg = wcb; | |
3355 | rfapiWithdrawTimerVPN(&t); /* frees wcb */ | |
65efcfce LB |
3356 | } |
3357 | ||
3358 | ||
d62a17ae | 3359 | /* |
9b6d8fcf | 3360 | * import a bgp_path_info if its route target list intersects with the |
65efcfce LB |
3361 | * import table's route target list |
3362 | */ | |
d62a17ae | 3363 | void rfapiBgpInfoFilteredImportVPN( |
3364 | struct rfapi_import_table *import_table, int action, struct peer *peer, | |
3365 | void *rfd, /* set for looped back routes */ | |
3366 | struct prefix *p, | |
3367 | struct prefix *aux_prefix, /* AFI_L2VPN: optional IP */ | |
3368 | afi_t afi, struct prefix_rd *prd, | |
9b6d8fcf DS |
3369 | struct attr *attr, /* part of bgp_path_info */ |
3370 | uint8_t type, /* part of bgp_path_info */ | |
3371 | uint8_t sub_type, /* part of bgp_path_info */ | |
3372 | uint32_t *label) /* part of bgp_path_info */ | |
65efcfce | 3373 | { |
fe08ba7e DS |
3374 | struct agg_table *rt = NULL; |
3375 | struct agg_node *rn; | |
3376 | struct agg_node *n; | |
4b7e6066 | 3377 | struct bgp_path_info *info_new; |
40381db7 | 3378 | struct bgp_path_info *bpi; |
4b7e6066 | 3379 | struct bgp_path_info *next; |
d62a17ae | 3380 | char buf[BUFSIZ]; |
3381 | struct prefix vn_prefix; | |
3382 | struct prefix un_prefix; | |
3383 | int un_prefix_valid = 0; | |
fe08ba7e | 3384 | struct agg_node *ern; |
d62a17ae | 3385 | int replacing = 0; |
3386 | int original_had_routes = 0; | |
3387 | struct prefix original_nexthop; | |
3388 | const char *action_str = NULL; | |
3389 | int is_it_ce = 0; | |
3390 | ||
3391 | struct bgp *bgp; | |
3392 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
3393 | ||
3394 | switch (action) { | |
3395 | case FIF_ACTION_UPDATE: | |
3396 | action_str = "update"; | |
3397 | break; | |
3398 | case FIF_ACTION_WITHDRAW: | |
3399 | action_str = "withdraw"; | |
3400 | break; | |
3401 | case FIF_ACTION_KILL: | |
3402 | action_str = "kill"; | |
3403 | break; | |
3404 | default: | |
3405 | assert(0); | |
3406 | break; | |
3407 | } | |
3408 | ||
3409 | if (import_table == bgp->rfapi->it_ce) | |
3410 | is_it_ce = 1; | |
3411 | ||
3412 | vnc_zlog_debug_verbose("%s: entry: %s%s: prefix %s/%d: it %p, afi %s", | |
3413 | __func__, (is_it_ce ? "CE-IT " : ""), action_str, | |
3414 | rfapi_ntop(p->family, &p->u.prefix, buf, BUFSIZ), | |
3415 | p->prefixlen, import_table, afi2str(afi)); | |
3416 | ||
3417 | VNC_ITRCCK; | |
3418 | ||
3419 | /* | |
3420 | * Compare rt lists. If no intersection, don't import this route | |
3421 | * On a withdraw, peer and RD are sufficient to determine if | |
3422 | * we should act. | |
3423 | */ | |
3424 | if (action == FIF_ACTION_UPDATE) { | |
3425 | if (!attr || !attr->ecommunity) { | |
3426 | ||
3427 | vnc_zlog_debug_verbose( | |
3428 | "%s: attr, extra, or ecommunity missing, not importing", | |
3429 | __func__); | |
3430 | return; | |
3431 | } | |
3432 | if ((import_table != bgp->rfapi->it_ce) | |
3433 | && !rfapiEcommunitiesIntersect(import_table->rt_import_list, | |
3434 | attr->ecommunity)) { | |
3435 | ||
3436 | vnc_zlog_debug_verbose( | |
3437 | "%s: it=%p: no ecommunity intersection", | |
3438 | __func__, import_table); | |
3439 | return; | |
3440 | } | |
3441 | ||
3442 | memset(&vn_prefix, 0, | |
3443 | sizeof(vn_prefix)); /* keep valgrind happy */ | |
3444 | if (rfapiGetNexthop(attr, &vn_prefix)) { | |
3445 | /* missing nexthop address would be a bad, bad thing */ | |
3446 | vnc_zlog_debug_verbose("%s: missing nexthop", __func__); | |
3447 | return; | |
3448 | } | |
3449 | } | |
3450 | ||
3451 | /* | |
3452 | * Figure out which radix tree the route would go into | |
3453 | */ | |
3454 | switch (afi) { | |
3455 | case AFI_IP: | |
3456 | case AFI_IP6: | |
3457 | case AFI_L2VPN: | |
3458 | rt = import_table->imported_vpn[afi]; | |
3459 | break; | |
3460 | ||
3461 | default: | |
450971aa | 3462 | flog_err(EC_LIB_DEVELOPMENT, "%s: bad afi %d", __func__, afi); |
d62a17ae | 3463 | return; |
3464 | } | |
3465 | ||
3466 | /* clear it */ | |
3467 | memset(&original_nexthop, 0, sizeof(original_nexthop)); | |
3468 | ||
3469 | /* | |
fe08ba7e | 3470 | * agg_node_lookup returns a node only if there is at least |
d62a17ae | 3471 | * one route attached. |
3472 | */ | |
fe08ba7e | 3473 | rn = agg_node_lookup(rt, p); |
d62a17ae | 3474 | |
3475 | vnc_zlog_debug_verbose("%s: rn=%p", __func__, rn); | |
3476 | ||
3477 | if (rn) { | |
3478 | ||
3479 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, 1); | |
fe08ba7e | 3480 | agg_unlock_node(rn); /* undo lock in agg_node_lookup */ |
d62a17ae | 3481 | |
3482 | if (rn->info) | |
3483 | original_had_routes = 1; | |
3484 | ||
3485 | if (VNC_DEBUG(VERBOSE)) { | |
3486 | vnc_zlog_debug_verbose("%s: showing IT node on entry", | |
3487 | __func__); | |
3488 | rfapiShowItNode(NULL, rn); /* debug */ | |
3489 | } | |
3490 | ||
3491 | /* | |
3492 | * Look for same route (will have same RD and peer) | |
3493 | */ | |
40381db7 | 3494 | bpi = rfapiItBiIndexSearch(rn, prd, peer, aux_prefix); |
d62a17ae | 3495 | |
40381db7 | 3496 | if (bpi) { |
d62a17ae | 3497 | |
3498 | /* | |
3499 | * This was an old test when we iterated over the | |
40381db7 | 3500 | * BPIs linearly. Since we're now looking up with |
d62a17ae | 3501 | * RD and peer, comparing types should not be |
3502 | * needed. Changed to assertion. | |
3503 | * | |
3504 | * Compare types. Doing so prevents a RFP-originated | |
3505 | * route from matching an imported route, for example. | |
3506 | */ | |
40381db7 | 3507 | if (VNC_DEBUG(VERBOSE) && bpi->type != type) |
3af8cb57 | 3508 | /* should be handled by RDs, but warn for now */ |
40381db7 DS |
3509 | zlog_warn("%s: type mismatch! (bpi=%d, arg=%d)", |
3510 | __func__, bpi->type, type); | |
d62a17ae | 3511 | |
40381db7 | 3512 | vnc_zlog_debug_verbose("%s: found matching bpi", |
d62a17ae | 3513 | __func__); |
3514 | ||
3515 | /* | |
3516 | * In the special CE table, withdrawals occur without | |
3517 | * holddown | |
3518 | */ | |
3519 | if (import_table == bgp->rfapi->it_ce) { | |
40381db7 | 3520 | vnc_direct_bgp_del_route_ce(bgp, rn, bpi); |
d62a17ae | 3521 | if (action == FIF_ACTION_WITHDRAW) |
3522 | action = FIF_ACTION_KILL; | |
3523 | } | |
3524 | ||
3525 | if (action == FIF_ACTION_WITHDRAW) { | |
3526 | ||
40381db7 DS |
3527 | int washolddown = CHECK_FLAG(bpi->flags, |
3528 | BGP_PATH_REMOVED); | |
d62a17ae | 3529 | |
3530 | vnc_zlog_debug_verbose( | |
3531 | "%s: withdrawing at prefix %s/%d%s", | |
9d303b37 DL |
3532 | __func__, rfapi_ntop(rn->p.family, |
3533 | &rn->p.u.prefix, | |
3534 | buf, BUFSIZ), | |
d62a17ae | 3535 | rn->p.prefixlen, |
3536 | (washolddown | |
3537 | ? " (already being withdrawn)" | |
3538 | : "")); | |
3539 | ||
3540 | VNC_ITRCCK; | |
3541 | if (!washolddown) { | |
3542 | rfapiBiStartWithdrawTimer( | |
40381db7 | 3543 | import_table, rn, bpi, afi, |
d62a17ae | 3544 | SAFI_MPLS_VPN, |
3545 | rfapiWithdrawTimerVPN); | |
3546 | ||
3547 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 3548 | bpi, import_table, afi, -1); |
d62a17ae | 3549 | import_table->holddown_count[afi] += 1; |
3550 | } | |
3551 | VNC_ITRCCK; | |
3552 | } else { | |
3553 | vnc_zlog_debug_verbose( | |
3554 | "%s: %s at prefix %s/%d", __func__, | |
3555 | ((action == FIF_ACTION_KILL) | |
3556 | ? "killing" | |
3557 | : "replacing"), | |
3558 | rfapi_ntop(rn->p.family, | |
3559 | &rn->p.u.prefix, buf, | |
3560 | BUFSIZ), | |
3561 | rn->p.prefixlen); | |
3562 | ||
3563 | /* | |
3564 | * If this route is waiting to be deleted | |
3565 | * because of | |
3566 | * a previous withdraw, we must cancel its | |
3567 | * timer. | |
3568 | */ | |
40381db7 DS |
3569 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
3570 | && bpi->extra->vnc.import.timer) { | |
d62a17ae | 3571 | |
3572 | struct thread *t = | |
40381db7 | 3573 | (struct thread *)bpi->extra->vnc |
d62a17ae | 3574 | .import.timer; |
3575 | struct rfapi_withdraw *wcb = t->arg; | |
3576 | ||
3577 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
3578 | thread_cancel(t); | |
3579 | ||
3580 | import_table->holddown_count[afi] -= 1; | |
3581 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 3582 | bpi, import_table, afi, 1); |
d62a17ae | 3583 | } |
3584 | /* | |
3585 | * decrement remote count (if route is remote) | |
3586 | * because | |
3587 | * we are going to remove it below | |
3588 | */ | |
40381db7 DS |
3589 | RFAPI_UPDATE_ITABLE_COUNT(bpi, import_table, |
3590 | afi, -1); | |
d62a17ae | 3591 | if (action == FIF_ACTION_UPDATE) { |
3592 | replacing = 1; | |
3593 | ||
3594 | /* | |
3595 | * make copy of original nexthop so we | |
3596 | * can see if it changed | |
3597 | */ | |
40381db7 | 3598 | rfapiGetNexthop(bpi->attr, |
d62a17ae | 3599 | &original_nexthop); |
3600 | ||
3601 | /* | |
40381db7 | 3602 | * remove bpi without doing any export |
d62a17ae | 3603 | * processing |
3604 | */ | |
40381db7 | 3605 | if (CHECK_FLAG(bpi->flags, |
1defdda8 | 3606 | BGP_PATH_VALID) |
40381db7 | 3607 | && VALID_INTERIOR_TYPE(bpi->type)) |
d62a17ae | 3608 | RFAPI_MONITOR_EXTERIOR(rn) |
3609 | ->valid_interior_count--; | |
40381db7 DS |
3610 | rfapiItBiIndexDel(rn, bpi); |
3611 | rfapiBgpInfoDetach(rn, bpi); | |
3612 | rfapiMonitorEncapDelete(bpi); | |
d62a17ae | 3613 | vnc_import_bgp_exterior_del_route_interior( |
40381db7 DS |
3614 | bgp, import_table, rn, bpi); |
3615 | rfapiBgpInfoFree(bpi); | |
d62a17ae | 3616 | } else { |
3617 | /* Kill */ | |
3618 | /* | |
40381db7 | 3619 | * remove bpi and do export processing |
d62a17ae | 3620 | */ |
3621 | import_table->holddown_count[afi] += 1; | |
40381db7 | 3622 | rfapiExpireVpnNow(import_table, rn, bpi, |
d62a17ae | 3623 | 0); |
3624 | } | |
3625 | } | |
3626 | } | |
3627 | } | |
3628 | ||
3629 | if (rn) | |
3630 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, replacing ? 1 : 0); | |
3631 | ||
3632 | if (action == FIF_ACTION_WITHDRAW || action == FIF_ACTION_KILL) { | |
3633 | VNC_ITRCCK; | |
3634 | return; | |
3635 | } | |
3636 | ||
3637 | info_new = | |
3638 | rfapiBgpInfoCreate(attr, peer, rfd, prd, type, sub_type, label); | |
3639 | ||
3640 | /* | |
3641 | * lookup un address in encap table | |
3642 | */ | |
fe08ba7e | 3643 | ern = agg_node_match(import_table->imported_encap[afi], &vn_prefix); |
d62a17ae | 3644 | if (ern) { |
3645 | rfapiCopyUnEncap2VPN(ern->info, info_new); | |
fe08ba7e | 3646 | agg_unlock_node(ern); /* undo lock in route_note_match */ |
d62a17ae | 3647 | } else { |
f7813c7c | 3648 | char bpf[PREFIX_STRLEN]; |
872ed4c7 | 3649 | |
f7813c7c | 3650 | prefix2str(&vn_prefix, bpf, sizeof(bpf)); |
d62a17ae | 3651 | /* Not a big deal, just means VPN route got here first */ |
3652 | vnc_zlog_debug_verbose("%s: no encap route for vn addr %s", | |
f7813c7c | 3653 | __func__, bpf); |
d62a17ae | 3654 | info_new->extra->vnc.import.un_family = 0; |
3655 | } | |
3656 | ||
3657 | if (rn) { | |
3658 | if (!replacing) | |
fe08ba7e | 3659 | agg_lock_node(rn); |
d62a17ae | 3660 | } else { |
3661 | /* | |
3662 | * No need to increment reference count, so only "get" | |
3663 | * if the node is not there already | |
3664 | */ | |
fe08ba7e | 3665 | rn = agg_node_get(rt, p); |
d62a17ae | 3666 | } |
3667 | ||
3668 | /* | |
3669 | * For ethernet routes, if there is an accompanying IP address, | |
40381db7 | 3670 | * save it in the bpi |
d62a17ae | 3671 | */ |
3672 | if ((AFI_L2VPN == afi) && aux_prefix) { | |
3673 | ||
40381db7 DS |
3674 | vnc_zlog_debug_verbose("%s: setting BPI's aux_prefix", |
3675 | __func__); | |
d62a17ae | 3676 | info_new->extra->vnc.import.aux_prefix = *aux_prefix; |
3677 | } | |
3678 | ||
3679 | vnc_zlog_debug_verbose( | |
40381db7 | 3680 | "%s: inserting bpi %p at prefix %s/%d #%d", __func__, info_new, |
d62a17ae | 3681 | rfapi_ntop(rn->p.family, &rn->p.u.prefix, buf, BUFSIZ), |
3682 | rn->p.prefixlen, rn->lock); | |
3683 | ||
3684 | rfapiBgpInfoAttachSorted(rn, info_new, afi, SAFI_MPLS_VPN); | |
3685 | rfapiItBiIndexAdd(rn, info_new); | |
3686 | if (!rfapiGetUnAddrOfVpnBi(info_new, NULL)) { | |
3687 | if (VALID_INTERIOR_TYPE(info_new->type)) | |
3688 | RFAPI_MONITOR_EXTERIOR(rn)->valid_interior_count++; | |
1defdda8 | 3689 | SET_FLAG(info_new->flags, BGP_PATH_VALID); |
d62a17ae | 3690 | } |
3691 | RFAPI_UPDATE_ITABLE_COUNT(info_new, import_table, afi, 1); | |
3692 | vnc_import_bgp_exterior_add_route_interior(bgp, import_table, rn, | |
3693 | info_new); | |
3694 | ||
3695 | if (import_table == bgp->rfapi->it_ce) | |
3696 | vnc_direct_bgp_add_route_ce(bgp, rn, info_new); | |
3697 | ||
3698 | if (VNC_DEBUG(VERBOSE)) { | |
3699 | vnc_zlog_debug_verbose("%s: showing IT node", __func__); | |
3700 | rfapiShowItNode(NULL, rn); /* debug */ | |
3701 | } | |
3702 | ||
3703 | rfapiMonitorEncapAdd(import_table, &vn_prefix, rn, info_new); | |
3704 | ||
3705 | if (!rfapiGetUnAddrOfVpnBi(info_new, &un_prefix)) { | |
3706 | ||
3707 | /* | |
3708 | * if we have a valid UN address (either via Encap route | |
3709 | * or via tunnel attribute), then we should attempt | |
3710 | * to move any monitors at less-specific nodes to this node | |
3711 | */ | |
3712 | rfapiMonitorMoveLonger(rn); | |
3713 | ||
3714 | un_prefix_valid = 1; | |
3715 | } | |
3716 | ||
3717 | /* | |
3718 | * 101129 Enhancement: if we add a route (implication: it is not | |
3719 | * in holddown), delete all other routes from this nve at this | |
3720 | * node that are in holddown, regardless of peer. | |
3721 | * | |
3722 | * Reasons it's OK to do that: | |
3723 | * | |
3724 | * - if the holddown route being deleted originally came from BGP VPN, | |
3725 | * it is already gone from BGP (implication of holddown), so there | |
3726 | * won't be any added inconsistency with the BGP RIB. | |
3727 | * | |
3728 | * - once a fresh route is added at a prefix, any routes in holddown | |
3729 | * at that prefix will not show up in RFP responses, so deleting | |
3730 | * the holddown routes won't affect the contents of responses. | |
3731 | * | |
3732 | * - lifetimes are supposed to be consistent, so there should not | |
3733 | * be a case where the fresh route has a shorter lifetime than | |
3734 | * the holddown route, so we don't expect the fresh route to | |
3735 | * disappear and complete its holddown time before the existing | |
3736 | * holddown routes time out. Therefore, we won't have a situation | |
3737 | * where we expect the existing holddown routes to be hidden and | |
3738 | * then to reappear sometime later (as holddown routes) in a | |
3739 | * RFP response. | |
3740 | * | |
3741 | * Among other things, this would enable us to skirt the problem | |
3742 | * of local holddown routes that refer to NVE descriptors that | |
3743 | * have already been closed (if the same NVE triggers a subsequent | |
3744 | * rfapi_open(), the new peer is different and doesn't match the | |
3745 | * peer of the holddown route, so the stale holddown route still | |
3746 | * hangs around until it times out instead of just being replaced | |
3747 | * by the fresh route). | |
3748 | */ | |
3749 | /* | |
40381db7 | 3750 | * We know that the new bpi will have been inserted before any routes |
d62a17ae | 3751 | * in holddown, so we can skip any that came before it |
3752 | */ | |
40381db7 | 3753 | for (bpi = info_new->next; bpi; bpi = next) { |
d62a17ae | 3754 | |
3755 | struct prefix pfx_vn; | |
3756 | struct prefix pfx_un; | |
3757 | int un_match = 0; | |
3758 | int remote_peer_match = 0; | |
3759 | ||
40381db7 | 3760 | next = bpi->next; |
d62a17ae | 3761 | |
3762 | /* | |
3763 | * Must be holddown | |
3764 | */ | |
40381db7 | 3765 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) |
d62a17ae | 3766 | continue; |
3767 | ||
3768 | /* | |
3769 | * Must match VN address (nexthop of VPN route) | |
3770 | */ | |
40381db7 | 3771 | if (rfapiGetNexthop(bpi->attr, &pfx_vn)) |
d62a17ae | 3772 | continue; |
3773 | if (!prefix_same(&pfx_vn, &vn_prefix)) | |
3774 | continue; | |
3775 | ||
3776 | if (un_prefix_valid && /* new route UN addr */ | |
40381db7 | 3777 | !rfapiGetUnAddrOfVpnBi(bpi, &pfx_un) |
d62a17ae | 3778 | && /* old route UN addr */ |
3779 | prefix_same(&pfx_un, &un_prefix)) { /* compare */ | |
3780 | un_match = 1; | |
3781 | } | |
40381db7 DS |
3782 | if (!RFAPI_LOCAL_BI(bpi) && !RFAPI_LOCAL_BI(info_new) |
3783 | && sockunion_same(&bpi->peer->su, &info_new->peer->su)) { | |
d62a17ae | 3784 | /* old & new are both remote, same peer */ |
3785 | remote_peer_match = 1; | |
3786 | } | |
3787 | ||
3788 | if (!un_match & !remote_peer_match) | |
3789 | continue; | |
3790 | ||
3791 | vnc_zlog_debug_verbose( | |
40381db7 | 3792 | "%s: removing holddown bpi matching NVE of new route", |
d62a17ae | 3793 | __func__); |
40381db7 | 3794 | if (bpi->extra->vnc.import.timer) { |
d62a17ae | 3795 | struct thread *t = |
40381db7 | 3796 | (struct thread *)bpi->extra->vnc.import.timer; |
d62a17ae | 3797 | struct rfapi_withdraw *wcb = t->arg; |
3798 | ||
3799 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
3800 | thread_cancel(t); | |
3801 | } | |
40381db7 | 3802 | rfapiExpireVpnNow(import_table, rn, bpi, 0); |
d62a17ae | 3803 | } |
3804 | ||
3805 | if (!original_had_routes) { | |
3806 | /* | |
3807 | * We went from 0 usable routes to 1 usable route. Perform the | |
3808 | * "Adding a Route" export process. | |
3809 | */ | |
3810 | vnc_direct_bgp_add_prefix(bgp, import_table, rn); | |
3811 | vnc_zebra_add_prefix(bgp, import_table, rn); | |
3812 | } else { | |
3813 | /* | |
3814 | * Check for nexthop change event | |
3815 | * Note: the prefix_same() test below detects two situations: | |
3816 | * 1. route is replaced, new route has different nexthop | |
3817 | * 2. new route is added (original_nexthop is 0) | |
3818 | */ | |
3819 | struct prefix new_nexthop; | |
3820 | ||
3821 | rfapiGetNexthop(attr, &new_nexthop); | |
3822 | if (!prefix_same(&original_nexthop, &new_nexthop)) { | |
3823 | /* | |
3824 | * nexthop change event | |
3825 | * vnc_direct_bgp_add_prefix() will recompute VN addr | |
3826 | * ecommunity | |
3827 | */ | |
3828 | vnc_direct_bgp_add_prefix(bgp, import_table, rn); | |
3829 | } | |
3830 | } | |
3831 | ||
3832 | if (!(bgp->rfapi_cfg->flags & BGP_VNC_CONFIG_CALLBACK_DISABLE)) { | |
fe08ba7e | 3833 | for (n = rn; n; n = agg_node_parent(n)) { |
d62a17ae | 3834 | // rfapiDoRouteCallback(import_table, n, NULL); |
3835 | } | |
3836 | rfapiMonitorItNodeChanged(import_table, rn, NULL); | |
3837 | } | |
3838 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, 0); | |
3839 | VNC_ITRCCK; | |
65efcfce LB |
3840 | } |
3841 | ||
21cf6b21 VJ |
3842 | static void rfapiBgpInfoFilteredImportBadSafi( |
3843 | struct rfapi_import_table *import_table, int action, struct peer *peer, | |
3844 | void *rfd, /* set for looped back routes */ | |
3845 | struct prefix *p, | |
3846 | struct prefix *aux_prefix, /* AFI_L2VPN: optional IP */ | |
3847 | afi_t afi, struct prefix_rd *prd, | |
9b6d8fcf DS |
3848 | struct attr *attr, /* part of bgp_path_info */ |
3849 | uint8_t type, /* part of bgp_path_info */ | |
3850 | uint8_t sub_type, /* part of bgp_path_info */ | |
3851 | uint32_t *label) /* part of bgp_path_info */ | |
21cf6b21 VJ |
3852 | { |
3853 | vnc_zlog_debug_verbose("%s: Error, bad safi", __func__); | |
3854 | } | |
3855 | ||
65efcfce | 3856 | static rfapi_bi_filtered_import_f * |
d62a17ae | 3857 | rfapiBgpInfoFilteredImportFunction(safi_t safi) |
65efcfce | 3858 | { |
d62a17ae | 3859 | switch (safi) { |
3860 | case SAFI_MPLS_VPN: | |
3861 | return rfapiBgpInfoFilteredImportVPN; | |
3862 | ||
3863 | case SAFI_ENCAP: | |
3864 | return rfapiBgpInfoFilteredImportEncap; | |
5c525538 RW |
3865 | |
3866 | default: | |
3867 | /* not expected */ | |
1c50c1c0 | 3868 | flog_err(EC_LIB_DEVELOPMENT, "%s: bad safi %d", __func__, safi); |
21cf6b21 | 3869 | return rfapiBgpInfoFilteredImportBadSafi; |
d62a17ae | 3870 | } |
65efcfce LB |
3871 | } |
3872 | ||
d62a17ae | 3873 | void rfapiProcessUpdate(struct peer *peer, |
3874 | void *rfd, /* set when looped from RFP/RFAPI */ | |
3875 | struct prefix *p, struct prefix_rd *prd, | |
d7c0a89a QY |
3876 | struct attr *attr, afi_t afi, safi_t safi, uint8_t type, |
3877 | uint8_t sub_type, uint32_t *label) | |
65efcfce | 3878 | { |
d62a17ae | 3879 | struct bgp *bgp; |
3880 | struct rfapi *h; | |
3881 | struct rfapi_import_table *it; | |
3882 | int has_ip_route = 1; | |
3883 | uint32_t lni = 0; | |
3884 | ||
3885 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
3886 | assert(bgp); | |
3887 | ||
3888 | h = bgp->rfapi; | |
3889 | assert(h); | |
3890 | ||
3891 | /* | |
3892 | * look at high-order byte of RD. FF means MAC | |
3893 | * address is present (VNC L2VPN) | |
3894 | */ | |
3895 | if ((safi == SAFI_MPLS_VPN) | |
3896 | && (decode_rd_type(prd->val) == RD_TYPE_VNC_ETH)) { | |
3897 | struct prefix pfx_mac_buf; | |
3898 | struct prefix pfx_nexthop_buf; | |
3899 | int rc; | |
3900 | ||
3901 | /* | |
3902 | * Set flag if prefix and nexthop are the same - don't | |
3903 | * add the route to normal IP-based import tables | |
3904 | */ | |
3905 | if (!rfapiGetNexthop(attr, &pfx_nexthop_buf)) { | |
3906 | if (!prefix_cmp(&pfx_nexthop_buf, p)) { | |
3907 | has_ip_route = 0; | |
3908 | } | |
3909 | } | |
3910 | ||
3911 | memset(&pfx_mac_buf, 0, sizeof(pfx_mac_buf)); | |
3912 | pfx_mac_buf.family = AF_ETHERNET; | |
3913 | pfx_mac_buf.prefixlen = 48; | |
3914 | memcpy(&pfx_mac_buf.u.prefix_eth.octet, prd->val + 2, 6); | |
3915 | ||
3916 | /* | |
3917 | * Find rt containing LNI (Logical Network ID), which | |
3918 | * _should_ always be present when mac address is present | |
3919 | */ | |
3920 | rc = rfapiEcommunityGetLNI(attr->ecommunity, &lni); | |
3921 | ||
3922 | vnc_zlog_debug_verbose( | |
3923 | "%s: rfapiEcommunityGetLNI returned %d, lni=%d, attr=%p", | |
3924 | __func__, rc, lni, attr); | |
8cea9547 | 3925 | if (!rc) { |
d62a17ae | 3926 | it = rfapiMacImportTableGet(bgp, lni); |
3927 | ||
3928 | rfapiBgpInfoFilteredImportVPN( | |
3929 | it, FIF_ACTION_UPDATE, peer, rfd, | |
3930 | &pfx_mac_buf, /* prefix */ | |
3931 | p, /* aux prefix: IP addr */ | |
3932 | AFI_L2VPN, prd, attr, type, sub_type, label); | |
3933 | } | |
3934 | } | |
3935 | ||
3936 | if (!has_ip_route) | |
3937 | return; | |
3938 | ||
3939 | /* | |
3940 | * Iterate over all import tables; do a filtered import | |
3941 | * for the afi/safi combination | |
3942 | */ | |
3943 | for (it = h->imports; it; it = it->next) { | |
3944 | (*rfapiBgpInfoFilteredImportFunction(safi))( | |
3945 | it, FIF_ACTION_UPDATE, peer, rfd, p, /* prefix */ | |
3946 | NULL, afi, prd, attr, type, sub_type, label); | |
3947 | } | |
3948 | ||
3949 | if (safi == SAFI_MPLS_VPN) { | |
3950 | vnc_direct_bgp_rh_add_route(bgp, afi, p, peer, attr); | |
d62a17ae | 3951 | rfapiBgpInfoFilteredImportVPN( |
3952 | bgp->rfapi->it_ce, FIF_ACTION_UPDATE, peer, rfd, | |
3953 | p, /* prefix */ | |
3954 | NULL, afi, prd, attr, type, sub_type, label); | |
3955 | } | |
65efcfce LB |
3956 | } |
3957 | ||
3958 | ||
d62a17ae | 3959 | void rfapiProcessWithdraw(struct peer *peer, void *rfd, struct prefix *p, |
3960 | struct prefix_rd *prd, struct attr *attr, afi_t afi, | |
d7c0a89a | 3961 | safi_t safi, uint8_t type, int kill) |
65efcfce | 3962 | { |
d62a17ae | 3963 | struct bgp *bgp; |
3964 | struct rfapi *h; | |
3965 | struct rfapi_import_table *it; | |
3966 | ||
3967 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
3968 | assert(bgp); | |
3969 | ||
3970 | h = bgp->rfapi; | |
3971 | assert(h); | |
3972 | ||
3973 | /* | |
3974 | * look at high-order byte of RD. FF means MAC | |
3975 | * address is present (VNC L2VPN) | |
3976 | */ | |
3977 | if (h->import_mac != NULL && safi == SAFI_MPLS_VPN | |
3978 | && decode_rd_type(prd->val) == RD_TYPE_VNC_ETH) { | |
3979 | struct prefix pfx_mac_buf; | |
3980 | void *cursor = NULL; | |
3981 | int rc; | |
3982 | ||
3983 | memset(&pfx_mac_buf, 0, sizeof(pfx_mac_buf)); | |
3984 | pfx_mac_buf.family = AF_ETHERNET; | |
3985 | pfx_mac_buf.prefixlen = 48; | |
3986 | memcpy(&pfx_mac_buf.u.prefix_eth, prd->val + 2, 6); | |
3987 | ||
3988 | /* | |
3989 | * withdraw does not contain attrs, so we don't have | |
3990 | * access to the route's LNI, which would ordinarily | |
3991 | * select the specific mac-based import table. Instead, | |
3992 | * we must iterate over all mac-based tables and rely | |
3993 | * on the RD to match. | |
3994 | * | |
3995 | * If this approach is too slow, add an index where | |
3996 | * key is {RD, peer} and value is the import table | |
3997 | */ | |
3998 | for (rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
3999 | &cursor); | |
4000 | rc == 0; rc = skiplist_next(h->import_mac, NULL, | |
4001 | (void **)&it, &cursor)) { | |
65efcfce LB |
4002 | |
4003 | #if DEBUG_L2_EXTRA | |
d62a17ae | 4004 | vnc_zlog_debug_verbose( |
4005 | "%s: calling rfapiBgpInfoFilteredImportVPN(it=%p, afi=AFI_L2VPN)", | |
4006 | __func__, it); | |
65efcfce LB |
4007 | #endif |
4008 | ||
d62a17ae | 4009 | rfapiBgpInfoFilteredImportVPN( |
4010 | it, | |
4011 | (kill ? FIF_ACTION_KILL : FIF_ACTION_WITHDRAW), | |
4012 | peer, rfd, &pfx_mac_buf, /* prefix */ | |
4013 | p, /* aux_prefix: IP */ | |
4014 | AFI_L2VPN, prd, attr, type, 0, | |
4015 | NULL); /* sub_type & label unused for withdraw | |
9d303b37 | 4016 | */ |
d62a17ae | 4017 | } |
4018 | } | |
4019 | ||
4020 | /* | |
4021 | * XXX For the case where the withdraw involves an L2 | |
4022 | * route with no IP information, we rely on the lack | |
4023 | * of RT-list intersection to filter out the withdraw | |
4024 | * from the IP-based import tables below | |
4025 | */ | |
4026 | ||
4027 | /* | |
4028 | * Iterate over all import tables; do a filtered import | |
4029 | * for the afi/safi combination | |
4030 | */ | |
4031 | ||
4032 | for (it = h->imports; it; it = it->next) { | |
4033 | (*rfapiBgpInfoFilteredImportFunction(safi))( | |
4034 | it, (kill ? FIF_ACTION_KILL : FIF_ACTION_WITHDRAW), | |
4035 | peer, rfd, p, /* prefix */ | |
4036 | NULL, afi, prd, attr, type, 0, | |
4037 | NULL); /* sub_type & label unused for withdraw */ | |
4038 | } | |
4039 | ||
4040 | /* TBD the deletion should happen after the lifetime expires */ | |
4041 | if (safi == SAFI_MPLS_VPN) | |
4042 | vnc_direct_bgp_rh_del_route(bgp, afi, p, peer); | |
4043 | ||
4044 | if (safi == SAFI_MPLS_VPN) { | |
4045 | rfapiBgpInfoFilteredImportVPN( | |
4046 | bgp->rfapi->it_ce, | |
4047 | (kill ? FIF_ACTION_KILL : FIF_ACTION_WITHDRAW), peer, | |
4048 | rfd, p, /* prefix */ | |
4049 | NULL, afi, prd, attr, type, 0, | |
4050 | NULL); /* sub_type & label unused for withdraw */ | |
4051 | } | |
65efcfce LB |
4052 | } |
4053 | ||
4054 | /* | |
4055 | * TBD optimized withdraw timer algorithm for case of many | |
4056 | * routes expiring at the same time due to peer drop. | |
4057 | */ | |
4058 | /* | |
40381db7 | 4059 | * 1. Visit all BPIs in all ENCAP import tables. |
65efcfce | 4060 | * |
40381db7 DS |
4061 | * a. If a bpi's peer is the failed peer, remove the bpi. |
4062 | * b. If the removed ENCAP bpi was first in the list of | |
4063 | * BPIs at this ENCAP node, loop over all monitors | |
65efcfce LB |
4064 | * at this node: |
4065 | * | |
4066 | * (1) for each ENCAP monitor, loop over all its | |
4067 | * VPN node monitors and set their RFAPI_MON_FLAG_NEEDCALLBACK | |
4068 | * flags. | |
4069 | * | |
40381db7 DS |
4070 | * 2. Visit all BPIs in all VPN import tables. |
4071 | * a. If a bpi's peer is the failed peer, remove the bpi. | |
65efcfce LB |
4072 | * b. loop over all the VPN node monitors and set their |
4073 | * RFAPI_MON_FLAG_NEEDCALLBACK flags | |
40381db7 | 4074 | * c. If there are no BPIs left at this VPN node, |
65efcfce LB |
4075 | * |
4076 | */ | |
4077 | ||
4078 | ||
4079 | /* surprise, this gets called from peer_delete(), from rfapi_close() */ | |
d62a17ae | 4080 | static void rfapiProcessPeerDownRt(struct peer *peer, |
4081 | struct rfapi_import_table *import_table, | |
4082 | afi_t afi, safi_t safi) | |
65efcfce | 4083 | { |
fe08ba7e | 4084 | struct agg_node *rn; |
40381db7 | 4085 | struct bgp_path_info *bpi; |
fe08ba7e | 4086 | struct agg_table *rt; |
d62a17ae | 4087 | int (*timer_service_func)(struct thread *); |
4088 | ||
4089 | assert(afi == AFI_IP || afi == AFI_IP6); | |
4090 | ||
4091 | VNC_ITRCCK; | |
4092 | ||
4093 | switch (safi) { | |
4094 | case SAFI_MPLS_VPN: | |
4095 | rt = import_table->imported_vpn[afi]; | |
4096 | timer_service_func = rfapiWithdrawTimerVPN; | |
4097 | break; | |
4098 | case SAFI_ENCAP: | |
4099 | rt = import_table->imported_encap[afi]; | |
4100 | timer_service_func = rfapiWithdrawTimerEncap; | |
4101 | break; | |
4102 | default: | |
21fe4510 QY |
4103 | /* Suppress uninitialized variable warning */ |
4104 | rt = NULL; | |
4105 | timer_service_func = NULL; | |
d62a17ae | 4106 | assert(0); |
4107 | } | |
4108 | ||
4109 | ||
fe08ba7e | 4110 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
40381db7 DS |
4111 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
4112 | if (bpi->peer == peer) { | |
d62a17ae | 4113 | |
40381db7 | 4114 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
d62a17ae | 4115 | /* already in holddown, skip */ |
4116 | continue; | |
4117 | } | |
4118 | ||
4119 | if (safi == SAFI_MPLS_VPN) { | |
4120 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 4121 | bpi, import_table, afi, -1); |
d62a17ae | 4122 | import_table->holddown_count[afi] += 1; |
4123 | } | |
40381db7 | 4124 | rfapiBiStartWithdrawTimer(import_table, rn, bpi, |
d62a17ae | 4125 | afi, safi, |
4126 | timer_service_func); | |
4127 | } | |
4128 | } | |
4129 | } | |
4130 | VNC_ITRCCK; | |
65efcfce LB |
4131 | } |
4132 | ||
d62a17ae | 4133 | /* |
65efcfce LB |
4134 | * This gets called when a peer connection drops. We have to remove |
4135 | * all the routes from this peer. | |
4136 | * | |
4137 | * Current approach is crude. TBD Optimize by setting fewer timers and | |
4138 | * grouping withdrawn routes so we can generate callbacks more | |
4139 | * efficiently. | |
4140 | */ | |
d62a17ae | 4141 | void rfapiProcessPeerDown(struct peer *peer) |
65efcfce | 4142 | { |
d62a17ae | 4143 | struct bgp *bgp; |
4144 | struct rfapi *h; | |
4145 | struct rfapi_import_table *it; | |
4146 | ||
4147 | /* | |
4148 | * If this peer is a "dummy" peer structure atached to a RFAPI | |
4149 | * nve_descriptor, we don't need to walk the import tables | |
4150 | * because the routes are already withdrawn by rfapi_close() | |
4151 | */ | |
4152 | if (CHECK_FLAG(peer->flags, PEER_FLAG_IS_RFAPI_HD)) | |
4153 | return; | |
4154 | ||
4155 | /* | |
40381db7 DS |
4156 | * 1. Visit all BPIs in all ENCAP import tables. |
4157 | * Start withdraw timer on the BPIs that match peer. | |
d62a17ae | 4158 | * |
40381db7 DS |
4159 | * 2. Visit All BPIs in all VPN import tables. |
4160 | * Start withdraw timer on the BPIs that match peer. | |
d62a17ae | 4161 | */ |
4162 | ||
4163 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
4164 | if (!bgp) | |
4165 | return; | |
4166 | ||
4167 | h = bgp->rfapi; | |
4168 | assert(h); | |
4169 | ||
4170 | for (it = h->imports; it; it = it->next) { | |
4171 | rfapiProcessPeerDownRt(peer, it, AFI_IP, SAFI_ENCAP); | |
4172 | rfapiProcessPeerDownRt(peer, it, AFI_IP6, SAFI_ENCAP); | |
4173 | rfapiProcessPeerDownRt(peer, it, AFI_IP, SAFI_MPLS_VPN); | |
4174 | rfapiProcessPeerDownRt(peer, it, AFI_IP6, SAFI_MPLS_VPN); | |
4175 | } | |
4176 | ||
4177 | if (h->it_ce) { | |
4178 | rfapiProcessPeerDownRt(peer, h->it_ce, AFI_IP, SAFI_MPLS_VPN); | |
4179 | rfapiProcessPeerDownRt(peer, h->it_ce, AFI_IP6, SAFI_MPLS_VPN); | |
4180 | } | |
65efcfce LB |
4181 | } |
4182 | ||
4183 | /* | |
4184 | * Import an entire RIB (for an afi/safi) to an import table RIB, | |
4185 | * filtered according to the import table's RT list | |
4186 | * | |
4187 | * TBD: does this function need additions to match rfapiProcessUpdate() | |
d62a17ae | 4188 | * for, e.g., L2 handling? |
65efcfce | 4189 | */ |
d62a17ae | 4190 | static void rfapiBgpTableFilteredImport(struct bgp *bgp, |
4191 | struct rfapi_import_table *it, | |
4192 | afi_t afi, safi_t safi) | |
65efcfce | 4193 | { |
d62a17ae | 4194 | struct bgp_node *rn1; |
4195 | struct bgp_node *rn2; | |
4196 | ||
4197 | /* Only these SAFIs have 2-level RIBS */ | |
4198 | assert(safi == SAFI_MPLS_VPN || safi == SAFI_ENCAP); | |
4199 | ||
4200 | /* | |
4201 | * Now visit all the rd nodes and the nodes of all the | |
4202 | * route tables attached to them, and import the routes | |
4203 | * if they have matching route targets | |
4204 | */ | |
4205 | for (rn1 = bgp_table_top(bgp->rib[afi][safi]); rn1; | |
4206 | rn1 = bgp_route_next(rn1)) { | |
4207 | ||
6f94b685 DS |
4208 | if (bgp_node_has_bgp_path_info_data(rn1)) { |
4209 | ||
67009e22 | 4210 | for (rn2 = bgp_table_top(bgp_node_get_bgp_table_info(rn1)); rn2; |
d62a17ae | 4211 | rn2 = bgp_route_next(rn2)) { |
4212 | ||
40381db7 | 4213 | struct bgp_path_info *bpi; |
d62a17ae | 4214 | |
6f94b685 DS |
4215 | for (bpi = bgp_node_get_bgp_path_info(rn2); |
4216 | bpi; bpi = bpi->next) { | |
d7c0a89a | 4217 | uint32_t label = 0; |
d62a17ae | 4218 | |
40381db7 | 4219 | if (CHECK_FLAG(bpi->flags, |
1defdda8 | 4220 | BGP_PATH_REMOVED)) |
d62a17ae | 4221 | continue; |
4222 | ||
40381db7 | 4223 | if (bpi->extra) |
d62a17ae | 4224 | label = decode_label( |
40381db7 | 4225 | &bpi->extra->label[0]); |
d62a17ae | 4226 | (*rfapiBgpInfoFilteredImportFunction( |
4227 | safi))( | |
4228 | it, /* which import table */ | |
40381db7 | 4229 | FIF_ACTION_UPDATE, bpi->peer, |
d62a17ae | 4230 | NULL, &rn2->p, /* prefix */ |
4231 | NULL, afi, | |
4232 | (struct prefix_rd *)&rn1->p, | |
40381db7 DS |
4233 | bpi->attr, bpi->type, |
4234 | bpi->sub_type, &label); | |
d62a17ae | 4235 | } |
4236 | } | |
4237 | } | |
4238 | } | |
65efcfce LB |
4239 | } |
4240 | ||
4241 | ||
4242 | /* per-bgp-instance rfapi data */ | |
d62a17ae | 4243 | struct rfapi *bgp_rfapi_new(struct bgp *bgp) |
65efcfce | 4244 | { |
d62a17ae | 4245 | struct rfapi *h; |
e7038dde | 4246 | afi_t afi; |
d62a17ae | 4247 | struct rfapi_rfp_cfg *cfg = NULL; |
4248 | struct rfapi_rfp_cb_methods *cbm = NULL; | |
4249 | ||
4250 | assert(bgp->rfapi_cfg == NULL); | |
4251 | ||
9f5dc319 | 4252 | h = XCALLOC(MTYPE_RFAPI, sizeof(struct rfapi)); |
d62a17ae | 4253 | |
4254 | for (afi = AFI_IP; afi < AFI_MAX; afi++) { | |
fe08ba7e | 4255 | h->un[afi] = agg_table_init(); |
d62a17ae | 4256 | } |
4257 | ||
4258 | /* | |
4259 | * initialize the ce import table | |
4260 | */ | |
4261 | h->it_ce = XCALLOC(MTYPE_RFAPI_IMPORTTABLE, | |
4262 | sizeof(struct rfapi_import_table)); | |
fe08ba7e DS |
4263 | h->it_ce->imported_vpn[AFI_IP] = agg_table_init(); |
4264 | h->it_ce->imported_vpn[AFI_IP6] = agg_table_init(); | |
4265 | h->it_ce->imported_encap[AFI_IP] = agg_table_init(); | |
4266 | h->it_ce->imported_encap[AFI_IP6] = agg_table_init(); | |
d62a17ae | 4267 | rfapiBgpTableFilteredImport(bgp, h->it_ce, AFI_IP, SAFI_MPLS_VPN); |
4268 | rfapiBgpTableFilteredImport(bgp, h->it_ce, AFI_IP6, SAFI_MPLS_VPN); | |
4269 | ||
4270 | /* | |
4271 | * Set up work queue for deferred rfapi_close operations | |
4272 | */ | |
4273 | h->deferred_close_q = | |
4274 | work_queue_new(bm->master, "rfapi deferred close"); | |
4275 | h->deferred_close_q->spec.workfunc = rfapi_deferred_close_workfunc; | |
4276 | h->deferred_close_q->spec.data = h; | |
4277 | ||
4278 | h->rfp = rfp_start(bm->master, &cfg, &cbm); | |
4279 | bgp->rfapi_cfg = bgp_rfapi_cfg_new(cfg); | |
4280 | if (cbm != NULL) { | |
4281 | h->rfp_methods = *cbm; | |
4282 | } | |
4283 | return h; | |
65efcfce LB |
4284 | } |
4285 | ||
d62a17ae | 4286 | void bgp_rfapi_destroy(struct bgp *bgp, struct rfapi *h) |
65efcfce | 4287 | { |
e7038dde | 4288 | afi_t afi; |
0ae6124f | 4289 | |
d62a17ae | 4290 | if (bgp == NULL || h == NULL) |
4291 | return; | |
4292 | ||
4293 | if (h->resolve_nve_nexthop) { | |
4294 | skiplist_free(h->resolve_nve_nexthop); | |
4295 | h->resolve_nve_nexthop = NULL; | |
4296 | } | |
4297 | ||
fe08ba7e DS |
4298 | agg_table_finish(h->it_ce->imported_vpn[AFI_IP]); |
4299 | agg_table_finish(h->it_ce->imported_vpn[AFI_IP6]); | |
4300 | agg_table_finish(h->it_ce->imported_encap[AFI_IP]); | |
4301 | agg_table_finish(h->it_ce->imported_encap[AFI_IP6]); | |
d62a17ae | 4302 | |
4303 | if (h->import_mac) { | |
4304 | struct rfapi_import_table *it; | |
4305 | void *cursor; | |
4306 | int rc; | |
4307 | ||
9d303b37 DL |
4308 | for (cursor = NULL, |
4309 | rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4310 | &cursor); | |
d62a17ae | 4311 | !rc; rc = skiplist_next(h->import_mac, NULL, (void **)&it, |
4312 | &cursor)) { | |
4313 | ||
4314 | rfapiImportTableFlush(it); | |
4315 | XFREE(MTYPE_RFAPI_IMPORTTABLE, it); | |
4316 | } | |
4317 | skiplist_free(h->import_mac); | |
4318 | h->import_mac = NULL; | |
4319 | } | |
4320 | ||
e208c8f9 | 4321 | work_queue_free_and_null(&h->deferred_close_q); |
d62a17ae | 4322 | |
4323 | if (h->rfp != NULL) | |
4324 | rfp_stop(h->rfp); | |
0ae6124f LB |
4325 | |
4326 | for (afi = AFI_IP; afi < AFI_MAX; afi++) { | |
fe08ba7e | 4327 | agg_table_finish(h->un[afi]); |
0ae6124f LB |
4328 | } |
4329 | ||
d62a17ae | 4330 | XFREE(MTYPE_RFAPI_IMPORTTABLE, h->it_ce); |
4331 | XFREE(MTYPE_RFAPI, h); | |
65efcfce LB |
4332 | } |
4333 | ||
4334 | struct rfapi_import_table * | |
d62a17ae | 4335 | rfapiImportTableRefAdd(struct bgp *bgp, struct ecommunity *rt_import_list, |
4336 | struct rfapi_nve_group_cfg *rfg) | |
65efcfce | 4337 | { |
d62a17ae | 4338 | struct rfapi *h; |
4339 | struct rfapi_import_table *it; | |
4340 | afi_t afi; | |
4341 | ||
4342 | h = bgp->rfapi; | |
4343 | assert(h); | |
4344 | ||
4345 | for (it = h->imports; it; it = it->next) { | |
4346 | if (ecommunity_cmp(it->rt_import_list, rt_import_list)) | |
4347 | break; | |
4348 | } | |
4349 | ||
4350 | vnc_zlog_debug_verbose("%s: matched it=%p", __func__, it); | |
4351 | ||
4352 | if (!it) { | |
4353 | it = XCALLOC(MTYPE_RFAPI_IMPORTTABLE, | |
4354 | sizeof(struct rfapi_import_table)); | |
4355 | assert(it); | |
4356 | it->next = h->imports; | |
4357 | h->imports = it; | |
4358 | ||
4359 | it->rt_import_list = ecommunity_dup(rt_import_list); | |
4360 | it->rfg = rfg; | |
4361 | it->monitor_exterior_orphans = | |
63265b5c | 4362 | skiplist_new(0, NULL, prefix_free_lists); |
d62a17ae | 4363 | |
4364 | /* | |
4365 | * fill import route tables from RIBs | |
4366 | * | |
4367 | * Potential area for optimization. If this occurs when | |
4368 | * tables are large (e.g., the operator adds a nve group | |
4369 | * with a new RT list to a running system), it could take | |
4370 | * a while. | |
4371 | * | |
4372 | */ | |
4373 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
4374 | ||
fe08ba7e DS |
4375 | it->imported_vpn[afi] = agg_table_init(); |
4376 | it->imported_encap[afi] = agg_table_init(); | |
d62a17ae | 4377 | |
4378 | rfapiBgpTableFilteredImport(bgp, it, afi, | |
4379 | SAFI_MPLS_VPN); | |
4380 | rfapiBgpTableFilteredImport(bgp, it, afi, SAFI_ENCAP); | |
4381 | ||
4382 | vnc_import_bgp_exterior_redist_enable_it(bgp, afi, it); | |
4383 | } | |
4384 | } | |
4385 | ||
4386 | it->refcount += 1; | |
4387 | ||
4388 | return it; | |
65efcfce LB |
4389 | } |
4390 | ||
4391 | /* | |
4392 | * skiplist element free function | |
4393 | */ | |
d62a17ae | 4394 | static void delete_rem_pfx_na_free(void *na) |
65efcfce | 4395 | { |
d62a17ae | 4396 | uint32_t *pCounter = ((struct rfapi_nve_addr *)na)->info; |
65efcfce | 4397 | |
d62a17ae | 4398 | *pCounter += 1; |
4399 | XFREE(MTYPE_RFAPI_NVE_ADDR, na); | |
65efcfce LB |
4400 | } |
4401 | ||
4402 | /* | |
4403 | * Common deleter for IP and MAC import tables | |
4404 | */ | |
d62a17ae | 4405 | static void rfapiDeleteRemotePrefixesIt( |
4406 | struct bgp *bgp, struct rfapi_import_table *it, struct prefix *un, | |
4407 | struct prefix *vn, struct prefix *p, int delete_active, | |
4408 | int delete_holddown, uint32_t *pARcount, uint32_t *pAHcount, | |
4409 | uint32_t *pHRcount, uint32_t *pHHcount, | |
4410 | struct skiplist *uniq_active_nves, struct skiplist *uniq_holddown_nves) | |
65efcfce | 4411 | { |
d62a17ae | 4412 | afi_t afi; |
65efcfce LB |
4413 | |
4414 | #if DEBUG_L2_EXTRA | |
d62a17ae | 4415 | { |
872ed4c7 | 4416 | char buf_pfx[PREFIX_STRLEN]; |
d62a17ae | 4417 | |
4418 | if (p) { | |
872ed4c7 | 4419 | prefix2str(p, buf_pfx, sizeof(buf_pfx)); |
d62a17ae | 4420 | } else { |
4421 | buf_pfx[0] = '*'; | |
4422 | buf_pfx[1] = 0; | |
4423 | } | |
4424 | ||
4425 | vnc_zlog_debug_verbose( | |
4426 | "%s: entry, p=%s, delete_active=%d, delete_holddown=%d", | |
4427 | __func__, buf_pfx, delete_active, delete_holddown); | |
4428 | } | |
65efcfce LB |
4429 | #endif |
4430 | ||
d62a17ae | 4431 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { |
4432 | ||
fe08ba7e DS |
4433 | struct agg_table *rt; |
4434 | struct agg_node *rn; | |
d62a17ae | 4435 | |
4436 | if (p && (family2afi(p->family) != afi)) { | |
4437 | continue; | |
4438 | } | |
4439 | ||
4440 | rt = it->imported_vpn[afi]; | |
4441 | if (!rt) | |
4442 | continue; | |
4443 | ||
4444 | vnc_zlog_debug_verbose("%s: scanning rt for afi=%d", __func__, | |
4445 | afi); | |
4446 | ||
fe08ba7e | 4447 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
40381db7 | 4448 | struct bgp_path_info *bpi; |
4b7e6066 | 4449 | struct bgp_path_info *next; |
d62a17ae | 4450 | |
8a005002 | 4451 | if (p && VNC_DEBUG(IMPORT_DEL_REMOTE)) { |
872ed4c7 DS |
4452 | char p1line[PREFIX_STRLEN]; |
4453 | char p2line[PREFIX_STRLEN]; | |
d62a17ae | 4454 | |
872ed4c7 DS |
4455 | prefix2str(p, p1line, sizeof(p1line)); |
4456 | prefix2str(&rn->p, p2line, sizeof(p2line)); | |
d62a17ae | 4457 | vnc_zlog_debug_any("%s: want %s, have %s", |
4458 | __func__, p1line, p2line); | |
4459 | } | |
4460 | ||
4461 | if (p && prefix_cmp(p, &rn->p)) | |
4462 | continue; | |
4463 | ||
4464 | { | |
872ed4c7 DS |
4465 | char buf_pfx[PREFIX_STRLEN]; |
4466 | ||
4467 | prefix2str(&rn->p, buf_pfx, sizeof(buf_pfx)); | |
d62a17ae | 4468 | vnc_zlog_debug_verbose("%s: rn pfx=%s", |
4469 | __func__, buf_pfx); | |
4470 | } | |
4471 | ||
4472 | /* TBD is this valid for afi == AFI_L2VPN? */ | |
4473 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, 1); | |
4474 | ||
40381db7 DS |
4475 | for (bpi = rn->info; bpi; bpi = next) { |
4476 | next = bpi->next; | |
d62a17ae | 4477 | |
4478 | struct prefix qpt; | |
4479 | struct prefix qct; | |
4480 | int qpt_valid = 0; | |
4481 | int qct_valid = 0; | |
4482 | int is_active = 0; | |
4483 | ||
40381db7 DS |
4484 | vnc_zlog_debug_verbose("%s: examining bpi %p", |
4485 | __func__, bpi); | |
d62a17ae | 4486 | |
05864da7 DS |
4487 | if (!rfapiGetNexthop(bpi->attr, &qpt)) |
4488 | qpt_valid = 1; | |
4489 | ||
d62a17ae | 4490 | if (vn) { |
4491 | if (!qpt_valid | |
4492 | || !prefix_match(vn, &qpt)) { | |
65efcfce | 4493 | #if DEBUG_L2_EXTRA |
d62a17ae | 4494 | vnc_zlog_debug_verbose( |
4495 | "%s: continue at vn && !qpt_valid || !prefix_match(vn, &qpt)", | |
4496 | __func__); | |
65efcfce | 4497 | #endif |
d62a17ae | 4498 | continue; |
4499 | } | |
4500 | } | |
65efcfce | 4501 | |
40381db7 | 4502 | if (!rfapiGetUnAddrOfVpnBi(bpi, &qct)) |
d62a17ae | 4503 | qct_valid = 1; |
65efcfce | 4504 | |
d62a17ae | 4505 | if (un) { |
4506 | if (!qct_valid | |
4507 | || !prefix_match(un, &qct)) { | |
65efcfce | 4508 | #if DEBUG_L2_EXTRA |
d62a17ae | 4509 | vnc_zlog_debug_verbose( |
4510 | "%s: continue at un && !qct_valid || !prefix_match(un, &qct)", | |
4511 | __func__); | |
65efcfce | 4512 | #endif |
d62a17ae | 4513 | continue; |
4514 | } | |
4515 | } | |
4516 | ||
4517 | ||
4518 | /* | |
40381db7 | 4519 | * Blow bpi away |
d62a17ae | 4520 | */ |
4521 | /* | |
4522 | * If this route is waiting to be deleted | |
4523 | * because of | |
4524 | * a previous withdraw, we must cancel its | |
4525 | * timer. | |
4526 | */ | |
40381db7 | 4527 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
d62a17ae | 4528 | if (!delete_holddown) |
4529 | continue; | |
40381db7 | 4530 | if (bpi->extra->vnc.import.timer) { |
d62a17ae | 4531 | |
4532 | struct thread *t = | |
40381db7 | 4533 | (struct thread *)bpi |
d62a17ae | 4534 | ->extra->vnc |
4535 | .import.timer; | |
4536 | struct rfapi_withdraw *wcb = | |
4537 | t->arg; | |
4538 | ||
4539 | wcb->import_table | |
4540 | ->holddown_count[afi] -= | |
4541 | 1; | |
4542 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 4543 | bpi, wcb->import_table, |
d62a17ae | 4544 | afi, 1); |
4545 | XFREE(MTYPE_RFAPI_WITHDRAW, | |
4546 | wcb); | |
4547 | thread_cancel(t); | |
4548 | } | |
4549 | } else { | |
4550 | if (!delete_active) | |
4551 | continue; | |
4552 | is_active = 1; | |
4553 | } | |
4554 | ||
4555 | vnc_zlog_debug_verbose( | |
40381db7 DS |
4556 | "%s: deleting bpi %p (qct_valid=%d, qpt_valid=%d, delete_holddown=%d, delete_active=%d)", |
4557 | __func__, bpi, qct_valid, qpt_valid, | |
d62a17ae | 4558 | delete_holddown, delete_active); |
4559 | ||
4560 | ||
4561 | /* | |
4562 | * add nve to list | |
4563 | */ | |
4564 | if (qct_valid && qpt_valid) { | |
4565 | ||
4566 | struct rfapi_nve_addr na; | |
4567 | struct rfapi_nve_addr *nap; | |
4568 | ||
4569 | memset(&na, 0, sizeof(na)); | |
4570 | assert(!rfapiQprefix2Raddr(&qct, | |
4571 | &na.un)); | |
4572 | assert(!rfapiQprefix2Raddr(&qpt, | |
4573 | &na.vn)); | |
4574 | ||
4575 | if (skiplist_search( | |
4576 | (is_active | |
4577 | ? uniq_active_nves | |
4578 | : uniq_holddown_nves), | |
4579 | &na, (void **)&nap)) { | |
4580 | char line[BUFSIZ]; | |
4581 | ||
4582 | nap = XCALLOC( | |
4583 | MTYPE_RFAPI_NVE_ADDR, | |
4584 | sizeof(struct | |
4585 | rfapi_nve_addr)); | |
4586 | assert(nap); | |
4587 | *nap = na; | |
4588 | nap->info = is_active | |
4589 | ? pAHcount | |
4590 | : pHHcount; | |
4591 | skiplist_insert( | |
4592 | (is_active | |
4593 | ? uniq_active_nves | |
4594 | : uniq_holddown_nves), | |
4595 | nap, nap); | |
4596 | ||
4597 | rfapiNveAddr2Str(nap, line, | |
4598 | BUFSIZ); | |
4599 | } | |
4600 | } | |
4601 | ||
4602 | vnc_direct_bgp_rh_del_route(bgp, afi, &rn->p, | |
40381db7 | 4603 | bpi->peer); |
d62a17ae | 4604 | |
40381db7 | 4605 | RFAPI_UPDATE_ITABLE_COUNT(bpi, it, afi, -1); |
d62a17ae | 4606 | it->holddown_count[afi] += 1; |
40381db7 | 4607 | rfapiExpireVpnNow(it, rn, bpi, 1); |
d62a17ae | 4608 | |
4609 | vnc_zlog_debug_verbose( | |
4610 | "%s: incrementing count (is_active=%d)", | |
4611 | __func__, is_active); | |
4612 | ||
4613 | if (is_active) | |
4614 | ++*pARcount; | |
4615 | else | |
4616 | ++*pHRcount; | |
4617 | } | |
4618 | } | |
4619 | } | |
65efcfce LB |
4620 | } |
4621 | ||
4622 | ||
4623 | /* | |
4624 | * For use by the "clear vnc prefixes" command | |
4625 | */ | |
4626 | /*------------------------------------------ | |
4627 | * rfapiDeleteRemotePrefixes | |
4628 | * | |
4629 | * UI helper: For use by the "clear vnc prefixes" command | |
4630 | * | |
d62a17ae | 4631 | * input: |
65efcfce LB |
4632 | * un if set, tunnel must match this prefix |
4633 | * vn if set, nexthop prefix must match this prefix | |
4634 | * p if set, prefix must match this prefix | |
5ff06872 | 4635 | * it if set, only look in this import table |
65efcfce LB |
4636 | * |
4637 | * output | |
4638 | * pARcount number of active routes deleted | |
4639 | * pAHcount number of active nves deleted | |
4640 | * pHRcount number of holddown routes deleted | |
4641 | * pHHcount number of holddown nves deleted | |
4642 | * | |
4643 | * return value: | |
4644 | * void | |
4645 | --------------------------------------------*/ | |
d62a17ae | 4646 | void rfapiDeleteRemotePrefixes(struct prefix *un, struct prefix *vn, |
4647 | struct prefix *p, | |
4648 | struct rfapi_import_table *arg_it, | |
4649 | int delete_active, int delete_holddown, | |
4650 | uint32_t *pARcount, uint32_t *pAHcount, | |
4651 | uint32_t *pHRcount, uint32_t *pHHcount) | |
65efcfce | 4652 | { |
d62a17ae | 4653 | struct bgp *bgp; |
4654 | struct rfapi *h; | |
4655 | struct rfapi_import_table *it; | |
4656 | uint32_t deleted_holddown_route_count = 0; | |
4657 | uint32_t deleted_active_route_count = 0; | |
4658 | uint32_t deleted_holddown_nve_count = 0; | |
4659 | uint32_t deleted_active_nve_count = 0; | |
4660 | struct skiplist *uniq_holddown_nves; | |
4661 | struct skiplist *uniq_active_nves; | |
4662 | ||
4663 | VNC_ITRCCK; | |
4664 | ||
4665 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
4666 | /* If no bgp instantiated yet, no vnc prefixes exist */ | |
4667 | if (!bgp) | |
4668 | return; | |
4669 | ||
4670 | h = bgp->rfapi; | |
4671 | assert(h); | |
4672 | ||
4673 | uniq_holddown_nves = | |
4674 | skiplist_new(0, rfapi_nve_addr_cmp, delete_rem_pfx_na_free); | |
4675 | uniq_active_nves = | |
4676 | skiplist_new(0, rfapi_nve_addr_cmp, delete_rem_pfx_na_free); | |
4677 | ||
4678 | /* | |
4679 | * Iterate over all import tables; do a filtered import | |
4680 | * for the afi/safi combination | |
4681 | */ | |
4682 | ||
4683 | if (arg_it) | |
4684 | it = arg_it; | |
4685 | else | |
4686 | it = h->imports; | |
4687 | for (; it;) { | |
4688 | ||
4689 | vnc_zlog_debug_verbose( | |
4690 | "%s: calling rfapiDeleteRemotePrefixesIt() on (IP) import %p", | |
4691 | __func__, it); | |
4692 | ||
4693 | rfapiDeleteRemotePrefixesIt( | |
4694 | bgp, it, un, vn, p, delete_active, delete_holddown, | |
4695 | &deleted_active_route_count, &deleted_active_nve_count, | |
4696 | &deleted_holddown_route_count, | |
4697 | &deleted_holddown_nve_count, uniq_active_nves, | |
4698 | uniq_holddown_nves); | |
4699 | ||
4700 | if (arg_it) | |
4701 | it = NULL; | |
4702 | else | |
4703 | it = it->next; | |
4704 | } | |
4705 | ||
4706 | /* | |
4707 | * Now iterate over L2 import tables | |
4708 | */ | |
4709 | if (h->import_mac && !(p && (p->family != AF_ETHERNET))) { | |
4710 | ||
4711 | void *cursor = NULL; | |
4712 | int rc; | |
4713 | ||
9d303b37 DL |
4714 | for (cursor = NULL, |
4715 | rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4716 | &cursor); | |
d62a17ae | 4717 | !rc; rc = skiplist_next(h->import_mac, NULL, (void **)&it, |
4718 | &cursor)) { | |
4719 | ||
4720 | vnc_zlog_debug_verbose( | |
4721 | "%s: calling rfapiDeleteRemotePrefixesIt() on import_mac %p", | |
4722 | __func__, it); | |
4723 | ||
4724 | rfapiDeleteRemotePrefixesIt( | |
4725 | bgp, it, un, vn, p, delete_active, | |
4726 | delete_holddown, &deleted_active_route_count, | |
4727 | &deleted_active_nve_count, | |
4728 | &deleted_holddown_route_count, | |
4729 | &deleted_holddown_nve_count, uniq_active_nves, | |
4730 | uniq_holddown_nves); | |
4731 | } | |
4732 | } | |
4733 | ||
4734 | /* | |
4735 | * our custom element freeing function above counts as it deletes | |
4736 | */ | |
4737 | skiplist_free(uniq_holddown_nves); | |
4738 | skiplist_free(uniq_active_nves); | |
4739 | ||
4740 | if (pARcount) | |
4741 | *pARcount = deleted_active_route_count; | |
4742 | if (pAHcount) | |
4743 | *pAHcount = deleted_active_nve_count; | |
4744 | if (pHRcount) | |
4745 | *pHRcount = deleted_holddown_route_count; | |
4746 | if (pHHcount) | |
4747 | *pHHcount = deleted_holddown_nve_count; | |
4748 | ||
4749 | VNC_ITRCCK; | |
65efcfce LB |
4750 | } |
4751 | ||
4752 | /*------------------------------------------ | |
4753 | * rfapiCountRemoteRoutes | |
4754 | * | |
4755 | * UI helper: count VRF routes from BGP side | |
4756 | * | |
d62a17ae | 4757 | * input: |
65efcfce LB |
4758 | * |
4759 | * output | |
4760 | * pALRcount count of active local routes | |
4761 | * pARRcount count of active remote routes | |
4762 | * pHRcount count of holddown routes | |
4763 | * pIRcount count of direct imported routes | |
4764 | * | |
4765 | * return value: | |
4766 | * void | |
4767 | --------------------------------------------*/ | |
d62a17ae | 4768 | void rfapiCountAllItRoutes(int *pALRcount, /* active local routes */ |
4769 | int *pARRcount, /* active remote routes */ | |
4770 | int *pHRcount, /* holddown routes */ | |
4771 | int *pIRcount) /* imported routes */ | |
65efcfce | 4772 | { |
d62a17ae | 4773 | struct bgp *bgp; |
4774 | struct rfapi *h; | |
4775 | struct rfapi_import_table *it; | |
4776 | afi_t afi; | |
4777 | ||
4778 | int total_active_local = 0; | |
4779 | int total_active_remote = 0; | |
4780 | int total_holddown = 0; | |
4781 | int total_imported = 0; | |
4782 | ||
4783 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
4784 | assert(bgp); | |
4785 | ||
4786 | h = bgp->rfapi; | |
4787 | assert(h); | |
4788 | ||
4789 | /* | |
4790 | * Iterate over all import tables; do a filtered import | |
4791 | * for the afi/safi combination | |
4792 | */ | |
4793 | ||
4794 | for (it = h->imports; it; it = it->next) { | |
4795 | ||
4796 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
4797 | ||
4798 | total_active_local += it->local_count[afi]; | |
4799 | total_active_remote += it->remote_count[afi]; | |
4800 | total_holddown += it->holddown_count[afi]; | |
4801 | total_imported += it->imported_count[afi]; | |
4802 | } | |
4803 | } | |
4804 | ||
4805 | void *cursor; | |
4806 | int rc; | |
4807 | ||
4808 | if (h->import_mac) { | |
9d303b37 DL |
4809 | for (cursor = NULL, |
4810 | rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4811 | &cursor); | |
d62a17ae | 4812 | !rc; rc = skiplist_next(h->import_mac, NULL, (void **)&it, |
4813 | &cursor)) { | |
4814 | ||
4815 | total_active_local += it->local_count[AFI_L2VPN]; | |
4816 | total_active_remote += it->remote_count[AFI_L2VPN]; | |
4817 | total_holddown += it->holddown_count[AFI_L2VPN]; | |
4818 | total_imported += it->imported_count[AFI_L2VPN]; | |
4819 | } | |
4820 | } | |
4821 | ||
4822 | ||
4823 | if (pALRcount) { | |
4824 | *pALRcount = total_active_local; | |
4825 | } | |
4826 | if (pARRcount) { | |
4827 | *pARRcount = total_active_remote; | |
4828 | } | |
4829 | if (pHRcount) { | |
4830 | *pHRcount = total_holddown; | |
4831 | } | |
4832 | if (pIRcount) { | |
4833 | *pIRcount = total_imported; | |
4834 | } | |
65efcfce LB |
4835 | } |
4836 | ||
4837 | /*------------------------------------------ | |
4838 | * rfapiGetHolddownFromLifetime | |
4839 | * | |
4840 | * calculate holddown value based on lifetime | |
4841 | * | |
d62a17ae | 4842 | * input: |
65efcfce LB |
4843 | * lifetime lifetime |
4844 | * | |
4845 | * return value: | |
4846 | * Holddown value based on lifetime, holddown_factor, | |
4847 | * and RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY | |
4848 | * | |
4849 | --------------------------------------------*/ | |
4850 | /* hold down time maxes out at RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY */ | |
d62a17ae | 4851 | uint32_t rfapiGetHolddownFromLifetime(uint32_t lifetime) |
65efcfce | 4852 | { |
d62a17ae | 4853 | uint32_t factor; |
4854 | struct bgp *bgp; | |
4855 | ||
4856 | bgp = bgp_get_default(); | |
4857 | if (bgp && bgp->rfapi_cfg) | |
4858 | factor = bgp->rfapi_cfg->rfp_cfg.holddown_factor; | |
4859 | else | |
4860 | factor = RFAPI_RFP_CFG_DEFAULT_HOLDDOWN_FACTOR; | |
4861 | ||
4862 | if (factor < 100 || lifetime < RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY) | |
4863 | lifetime = lifetime * factor / 100; | |
4864 | if (lifetime < RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY) | |
4865 | return lifetime; | |
4866 | else | |
4867 | return RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY; | |
65efcfce | 4868 | } |