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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 | */ | |
d62a17ae | 126 | void rfapiCheckRouteCount() |
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 | ||
377 | /* | |
378 | * Extract the tunnel type from the extended community | |
379 | */ | |
d62a17ae | 380 | int rfapiGetTunnelType(struct attr *attr, bgp_encap_types *type) |
65efcfce | 381 | { |
d62a17ae | 382 | *type = BGP_ENCAP_TYPE_MPLS; /* default to MPLS */ |
383 | if (attr && attr->ecommunity) { | |
384 | struct ecommunity *ecom = attr->ecommunity; | |
385 | int i; | |
386 | ||
387 | for (i = 0; i < (ecom->size * ECOMMUNITY_SIZE); | |
388 | i += ECOMMUNITY_SIZE) { | |
389 | uint8_t *ep; | |
390 | ||
391 | ep = ecom->val + i; | |
392 | if (ep[0] == ECOMMUNITY_ENCODE_OPAQUE | |
393 | && ep[1] == ECOMMUNITY_OPAQUE_SUBTYPE_ENCAP) { | |
394 | *type = (ep[6] << 8) + ep[7]; | |
395 | return 0; | |
396 | } | |
397 | } | |
398 | } | |
399 | ||
400 | return ENOENT; | |
65efcfce LB |
401 | } |
402 | ||
403 | ||
404 | /* | |
405 | * Look for UN address in Encap attribute | |
406 | */ | |
d62a17ae | 407 | int rfapiGetVncTunnelUnAddr(struct attr *attr, struct prefix *p) |
65efcfce | 408 | { |
d62a17ae | 409 | struct bgp_attr_encap_subtlv *pEncap; |
410 | bgp_encap_types tun_type; | |
411 | ||
412 | rfapiGetTunnelType(attr, &tun_type); | |
413 | if (tun_type == BGP_ENCAP_TYPE_MPLS) { | |
414 | if (!p) | |
415 | return 0; | |
416 | /* MPLS carries UN address in next hop */ | |
417 | rfapiNexthop2Prefix(attr, p); | |
418 | if (p->family != 0) | |
419 | return 0; | |
420 | ||
421 | return ENOENT; | |
422 | } | |
423 | if (attr) { | |
424 | for (pEncap = attr->encap_subtlvs; pEncap; | |
425 | pEncap = pEncap->next) { | |
426 | ||
427 | if (pEncap->type | |
428 | == BGP_ENCAP_SUBTLV_TYPE_REMOTE_ENDPOINT) { /* un | |
429 | addr | |
430 | */ | |
431 | switch (pEncap->length) { | |
432 | case 8: | |
433 | if (p) { | |
434 | p->family = AF_INET; | |
435 | p->prefixlen = 32; | |
436 | memcpy(p->u.val, pEncap->value, | |
437 | 4); | |
438 | } | |
439 | return 0; | |
440 | ||
441 | case 20: | |
442 | if (p) { | |
443 | p->family = AF_INET6; | |
444 | p->prefixlen = 128; | |
445 | memcpy(p->u.val, pEncap->value, | |
446 | 16); | |
447 | } | |
448 | return 0; | |
449 | } | |
450 | } | |
451 | } | |
452 | } | |
453 | ||
454 | return ENOENT; | |
65efcfce LB |
455 | } |
456 | ||
457 | /* | |
458 | * Get UN address wherever it might be | |
459 | */ | |
40381db7 | 460 | int rfapiGetUnAddrOfVpnBi(struct bgp_path_info *bpi, struct prefix *p) |
65efcfce | 461 | { |
d62a17ae | 462 | /* If it's in this route's VNC attribute, we're done */ |
40381db7 | 463 | if (!rfapiGetVncTunnelUnAddr(bpi->attr, p)) |
d62a17ae | 464 | return 0; |
465 | /* | |
466 | * Otherwise, see if it's cached from a corresponding ENCAP SAFI | |
467 | * advertisement | |
468 | */ | |
40381db7 DS |
469 | if (bpi->extra) { |
470 | switch (bpi->extra->vnc.import.un_family) { | |
d62a17ae | 471 | case AF_INET: |
472 | if (p) { | |
40381db7 DS |
473 | p->family = bpi->extra->vnc.import.un_family; |
474 | p->u.prefix4 = bpi->extra->vnc.import.un.addr4; | |
d62a17ae | 475 | p->prefixlen = 32; |
476 | } | |
477 | return 0; | |
478 | case AF_INET6: | |
479 | if (p) { | |
40381db7 DS |
480 | p->family = bpi->extra->vnc.import.un_family; |
481 | p->u.prefix6 = bpi->extra->vnc.import.un.addr6; | |
d62a17ae | 482 | p->prefixlen = 128; |
483 | } | |
484 | return 0; | |
485 | default: | |
486 | if (p) | |
487 | p->family = 0; | |
65efcfce | 488 | #if DEBUG_ENCAP_MONITOR |
d62a17ae | 489 | vnc_zlog_debug_verbose( |
40381db7 | 490 | "%s: bpi->extra->vnc.import.un_family is 0, no UN addr", |
d62a17ae | 491 | __func__); |
65efcfce | 492 | #endif |
d62a17ae | 493 | break; |
494 | } | |
495 | } | |
65efcfce | 496 | |
d62a17ae | 497 | return ENOENT; |
65efcfce LB |
498 | } |
499 | ||
500 | ||
501 | /* | |
9b6d8fcf | 502 | * Make a new bgp_path_info from gathered parameters |
65efcfce | 503 | */ |
4b7e6066 DS |
504 | static struct bgp_path_info *rfapiBgpInfoCreate(struct attr *attr, |
505 | struct peer *peer, void *rfd, | |
506 | struct prefix_rd *prd, | |
507 | uint8_t type, uint8_t sub_type, | |
508 | uint32_t *label) | |
65efcfce | 509 | { |
4b7e6066 | 510 | struct bgp_path_info *new; |
d62a17ae | 511 | |
18ee8310 | 512 | new = bgp_path_info_new(); |
d62a17ae | 513 | assert(new); |
514 | ||
515 | if (attr) { | |
516 | if (!new->attr) | |
517 | new->attr = bgp_attr_intern(attr); | |
518 | } | |
18ee8310 | 519 | bgp_path_info_extra_get(new); |
d62a17ae | 520 | if (prd) { |
521 | new->extra->vnc.import.rd = *prd; | |
522 | rfapi_time(&new->extra->vnc.import.create_time); | |
523 | } | |
524 | if (label) | |
317f1fe0 | 525 | encode_label(*label, &new->extra->label[0]); |
d62a17ae | 526 | new->type = type; |
527 | new->sub_type = sub_type; | |
528 | new->peer = peer; | |
529 | peer_lock(peer); | |
530 | ||
531 | return new; | |
65efcfce LB |
532 | } |
533 | ||
534 | /* | |
9b6d8fcf | 535 | * Frees bgp_path_info as used in import tables (parts are not |
65efcfce LB |
536 | * allocated exactly the way they are in the main RIBs) |
537 | */ | |
4b7e6066 | 538 | static void rfapiBgpInfoFree(struct bgp_path_info *goner) |
65efcfce | 539 | { |
d62a17ae | 540 | if (!goner) |
541 | return; | |
542 | ||
543 | if (goner->peer) { | |
544 | vnc_zlog_debug_verbose("%s: calling peer_unlock(%p), #%d", | |
545 | __func__, goner->peer, | |
546 | goner->peer->lock); | |
547 | peer_unlock(goner->peer); | |
548 | } | |
549 | ||
550 | if (goner->attr) { | |
551 | bgp_attr_unintern(&goner->attr); | |
552 | } | |
553 | if (goner->extra) { | |
554 | assert(!goner->extra->damp_info); /* Not used in import tbls */ | |
555 | XFREE(MTYPE_BGP_ROUTE_EXTRA, goner->extra); | |
556 | goner->extra = NULL; | |
557 | } | |
558 | XFREE(MTYPE_BGP_ROUTE, goner); | |
65efcfce LB |
559 | } |
560 | ||
d62a17ae | 561 | struct rfapi_import_table *rfapiMacImportTableGetNoAlloc(struct bgp *bgp, |
562 | uint32_t lni) | |
65efcfce | 563 | { |
d62a17ae | 564 | struct rfapi *h; |
565 | struct rfapi_import_table *it = NULL; | |
566 | uintptr_t lni_as_ptr = lni; | |
65efcfce | 567 | |
d62a17ae | 568 | h = bgp->rfapi; |
569 | if (!h) | |
570 | return NULL; | |
65efcfce | 571 | |
d62a17ae | 572 | if (!h->import_mac) |
573 | return NULL; | |
65efcfce | 574 | |
d62a17ae | 575 | if (skiplist_search(h->import_mac, (void *)lni_as_ptr, (void **)&it)) |
576 | return NULL; | |
65efcfce | 577 | |
d62a17ae | 578 | return it; |
65efcfce LB |
579 | } |
580 | ||
d62a17ae | 581 | struct rfapi_import_table *rfapiMacImportTableGet(struct bgp *bgp, uint32_t lni) |
65efcfce | 582 | { |
d62a17ae | 583 | struct rfapi *h; |
584 | struct rfapi_import_table *it = NULL; | |
585 | uintptr_t lni_as_ptr = lni; | |
586 | ||
587 | h = bgp->rfapi; | |
588 | assert(h); | |
589 | ||
590 | if (!h->import_mac) { | |
591 | /* default cmp is good enough for LNI */ | |
592 | h->import_mac = skiplist_new(0, NULL, NULL); | |
593 | } | |
594 | ||
595 | if (skiplist_search(h->import_mac, (void *)lni_as_ptr, (void **)&it)) { | |
596 | ||
597 | struct ecommunity *enew; | |
598 | struct ecommunity_val eval; | |
599 | afi_t afi; | |
600 | ||
601 | it = XCALLOC(MTYPE_RFAPI_IMPORTTABLE, | |
602 | sizeof(struct rfapi_import_table)); | |
603 | /* set RT list of new import table based on LNI */ | |
604 | memset((char *)&eval, 0, sizeof(eval)); | |
605 | eval.val[0] = 0; /* VNC L2VPN */ | |
606 | eval.val[1] = 2; /* VNC L2VPN */ | |
607 | eval.val[5] = (lni >> 16) & 0xff; | |
608 | eval.val[6] = (lni >> 8) & 0xff; | |
609 | eval.val[7] = (lni >> 0) & 0xff; | |
610 | ||
611 | enew = ecommunity_new(); | |
612 | ecommunity_add_val(enew, &eval); | |
613 | it->rt_import_list = enew; | |
614 | ||
615 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
fe08ba7e DS |
616 | it->imported_vpn[afi] = agg_table_init(); |
617 | it->imported_encap[afi] = agg_table_init(); | |
d62a17ae | 618 | } |
619 | ||
620 | it->l2_logical_net_id = lni; | |
621 | ||
622 | skiplist_insert(h->import_mac, (void *)lni_as_ptr, it); | |
623 | } | |
624 | ||
625 | assert(it); | |
626 | return it; | |
65efcfce LB |
627 | } |
628 | ||
629 | /* | |
630 | * Implement MONITOR_MOVE_SHORTER(original_node) from | |
631 | * RFAPI-Import-Event-Handling.txt | |
d62a17ae | 632 | * |
65efcfce LB |
633 | * Returns pointer to the list of moved monitors |
634 | */ | |
635 | static struct rfapi_monitor_vpn * | |
fe08ba7e | 636 | rfapiMonitorMoveShorter(struct agg_node *original_vpn_node, int lockoffset) |
65efcfce | 637 | { |
40381db7 | 638 | struct bgp_path_info *bpi; |
fe08ba7e | 639 | struct agg_node *par; |
d62a17ae | 640 | struct rfapi_monitor_vpn *m; |
641 | struct rfapi_monitor_vpn *mlast; | |
642 | struct rfapi_monitor_vpn *moved; | |
643 | int movecount = 0; | |
644 | int parent_already_refcounted = 0; | |
65efcfce | 645 | |
d62a17ae | 646 | RFAPI_CHECK_REFCOUNT(original_vpn_node, SAFI_MPLS_VPN, lockoffset); |
65efcfce LB |
647 | |
648 | #if DEBUG_MONITOR_MOVE_SHORTER | |
d62a17ae | 649 | { |
872ed4c7 | 650 | char buf[PREFIX_STRLEN]; |
65efcfce | 651 | |
872ed4c7 | 652 | prefix2str(&original_vpn_node->p, buf, sizeof(buf)); |
d62a17ae | 653 | vnc_zlog_debug_verbose("%s: called with node pfx=%s", __func__, |
654 | buf); | |
655 | } | |
65efcfce LB |
656 | #endif |
657 | ||
d62a17ae | 658 | /* |
40381db7 | 659 | * 1. If there is at least one bpi (either regular route or |
d62a17ae | 660 | * route marked as withdrawn, with a pending timer) at |
661 | * original_node with a valid UN address, we're done. Return. | |
662 | */ | |
40381db7 | 663 | for (bpi = original_vpn_node->info; bpi; bpi = bpi->next) { |
d62a17ae | 664 | struct prefix pfx; |
665 | ||
40381db7 | 666 | if (!rfapiGetUnAddrOfVpnBi(bpi, &pfx)) { |
65efcfce | 667 | #if DEBUG_MONITOR_MOVE_SHORTER |
d62a17ae | 668 | vnc_zlog_debug_verbose( |
669 | "%s: have valid UN at original node, no change", | |
670 | __func__); | |
65efcfce | 671 | #endif |
d62a17ae | 672 | return NULL; |
673 | } | |
674 | } | |
675 | ||
676 | /* | |
677 | * 2. Travel up the tree (toward less-specific prefixes) from | |
678 | * original_node to find the first node that has at least | |
679 | * one route (even if it is only a withdrawn route) with a | |
680 | * valid UN address. Call this node "Node P." | |
681 | */ | |
fe08ba7e DS |
682 | for (par = agg_node_parent(original_vpn_node); par; |
683 | par = agg_node_parent(par)) { | |
40381db7 | 684 | for (bpi = par->info; bpi; bpi = bpi->next) { |
d62a17ae | 685 | struct prefix pfx; |
40381db7 | 686 | if (!rfapiGetUnAddrOfVpnBi(bpi, &pfx)) { |
d62a17ae | 687 | break; |
688 | } | |
689 | } | |
40381db7 | 690 | if (bpi) |
d62a17ae | 691 | break; |
692 | } | |
693 | ||
694 | if (par) { | |
695 | RFAPI_CHECK_REFCOUNT(par, SAFI_MPLS_VPN, 0); | |
696 | } | |
697 | ||
698 | /* | |
699 | * If no less-specific routes, try to use the 0/0 node | |
700 | */ | |
701 | if (!par) { | |
702 | /* this isn't necessarily 0/0 */ | |
fe08ba7e | 703 | par = agg_route_table_top(original_vpn_node); |
d62a17ae | 704 | |
705 | /* | |
706 | * If we got the top node but it wasn't 0/0, | |
707 | * ignore it | |
708 | */ | |
709 | if (par && par->p.prefixlen) { | |
fe08ba7e | 710 | agg_unlock_node(par); /* maybe free */ |
d62a17ae | 711 | par = NULL; |
712 | } | |
713 | ||
714 | if (par) { | |
715 | ++parent_already_refcounted; | |
716 | } | |
717 | } | |
718 | ||
719 | /* | |
720 | * Create 0/0 node if it isn't there | |
721 | */ | |
722 | if (!par) { | |
723 | struct prefix pfx_default; | |
724 | ||
725 | memset(&pfx_default, 0, sizeof(pfx_default)); | |
726 | pfx_default.family = original_vpn_node->p.family; | |
727 | ||
728 | /* creates default node if none exists */ | |
fe08ba7e DS |
729 | par = agg_node_get(agg_get_table(original_vpn_node), |
730 | &pfx_default); | |
d62a17ae | 731 | ++parent_already_refcounted; |
732 | } | |
733 | ||
734 | /* | |
735 | * 3. Move each of the monitors found at original_node to Node P. | |
736 | * These are "Moved Monitors." | |
737 | * | |
738 | */ | |
739 | ||
740 | /* | |
741 | * Attach at end so that the list pointer we return points | |
742 | * only to the moved routes | |
743 | */ | |
744 | for (m = RFAPI_MONITOR_VPN(par), mlast = NULL; m; | |
745 | mlast = m, m = m->next) | |
746 | ; | |
747 | ||
748 | if (mlast) { | |
749 | moved = mlast->next = RFAPI_MONITOR_VPN(original_vpn_node); | |
750 | } else { | |
751 | moved = RFAPI_MONITOR_VPN_W_ALLOC(par) = | |
752 | RFAPI_MONITOR_VPN(original_vpn_node); | |
753 | } | |
754 | if (RFAPI_MONITOR_VPN( | |
755 | original_vpn_node)) /* check agg, so not allocated */ | |
756 | RFAPI_MONITOR_VPN_W_ALLOC(original_vpn_node) = NULL; | |
757 | ||
758 | /* | |
759 | * update the node pointers on the monitors | |
760 | */ | |
761 | for (m = moved; m; m = m->next) { | |
762 | ++movecount; | |
763 | m->node = par; | |
764 | } | |
765 | ||
766 | RFAPI_CHECK_REFCOUNT(par, SAFI_MPLS_VPN, | |
767 | parent_already_refcounted - movecount); | |
768 | while (movecount > parent_already_refcounted) { | |
fe08ba7e | 769 | agg_lock_node(par); |
d62a17ae | 770 | ++parent_already_refcounted; |
771 | } | |
772 | while (movecount < parent_already_refcounted) { | |
773 | /* unlikely, but code defensively */ | |
fe08ba7e | 774 | agg_unlock_node(par); |
d62a17ae | 775 | --parent_already_refcounted; |
776 | } | |
777 | RFAPI_CHECK_REFCOUNT(original_vpn_node, SAFI_MPLS_VPN, | |
778 | movecount + lockoffset); | |
779 | while (movecount--) { | |
fe08ba7e | 780 | agg_unlock_node(original_vpn_node); |
d62a17ae | 781 | } |
65efcfce LB |
782 | |
783 | #if DEBUG_MONITOR_MOVE_SHORTER | |
d62a17ae | 784 | { |
872ed4c7 | 785 | char buf[PREFIX_STRLEN]; |
65efcfce | 786 | |
872ed4c7 | 787 | prefix2str(&par->p, buf, sizeof(buf)); |
d62a17ae | 788 | vnc_zlog_debug_verbose("%s: moved to node pfx=%s", __func__, |
789 | buf); | |
790 | } | |
65efcfce LB |
791 | #endif |
792 | ||
793 | ||
d62a17ae | 794 | return moved; |
65efcfce LB |
795 | } |
796 | ||
797 | /* | |
798 | * Implement MONITOR_MOVE_LONGER(new_node) from | |
799 | * RFAPI-Import-Event-Handling.txt | |
800 | */ | |
fe08ba7e | 801 | static void rfapiMonitorMoveLonger(struct agg_node *new_vpn_node) |
65efcfce | 802 | { |
d62a17ae | 803 | struct rfapi_monitor_vpn *monitor; |
804 | struct rfapi_monitor_vpn *mlast; | |
40381db7 | 805 | struct bgp_path_info *bpi; |
fe08ba7e | 806 | struct agg_node *par; |
d62a17ae | 807 | |
808 | RFAPI_CHECK_REFCOUNT(new_vpn_node, SAFI_MPLS_VPN, 0); | |
809 | ||
810 | /* | |
811 | * Make sure we have at least one valid route at the new node | |
812 | */ | |
40381db7 | 813 | for (bpi = new_vpn_node->info; bpi; bpi = bpi->next) { |
d62a17ae | 814 | struct prefix pfx; |
40381db7 | 815 | if (!rfapiGetUnAddrOfVpnBi(bpi, &pfx)) |
d62a17ae | 816 | break; |
817 | } | |
818 | ||
40381db7 | 819 | if (!bpi) { |
d62a17ae | 820 | vnc_zlog_debug_verbose( |
821 | "%s: no valid routes at node %p, so not attempting moves", | |
822 | __func__, new_vpn_node); | |
823 | return; | |
824 | } | |
825 | ||
826 | /* | |
827 | * Find first parent node that has monitors | |
828 | */ | |
fe08ba7e DS |
829 | for (par = agg_node_parent(new_vpn_node); par; |
830 | par = agg_node_parent(par)) { | |
d62a17ae | 831 | if (RFAPI_MONITOR_VPN(par)) |
832 | break; | |
833 | } | |
834 | ||
835 | if (!par) { | |
836 | vnc_zlog_debug_verbose( | |
837 | "%s: no parent nodes with monitors, done", __func__); | |
838 | return; | |
839 | } | |
840 | ||
841 | /* | |
842 | * Check each of these monitors to see of their longest-match | |
843 | * is now the updated node. Move any such monitors to the more- | |
844 | * specific updated node | |
845 | */ | |
846 | for (mlast = NULL, monitor = RFAPI_MONITOR_VPN(par); monitor;) { | |
847 | ||
848 | /* | |
849 | * If new longest match for monitor prefix is the new | |
850 | * route's prefix, move monitor to new route's prefix | |
851 | */ | |
852 | if (prefix_match(&new_vpn_node->p, &monitor->p)) { | |
853 | /* detach */ | |
854 | if (mlast) { | |
855 | mlast->next = monitor->next; | |
856 | } else { | |
857 | RFAPI_MONITOR_VPN_W_ALLOC(par) = monitor->next; | |
858 | } | |
859 | ||
860 | ||
861 | /* attach */ | |
862 | monitor->next = RFAPI_MONITOR_VPN(new_vpn_node); | |
863 | RFAPI_MONITOR_VPN_W_ALLOC(new_vpn_node) = monitor; | |
864 | monitor->node = new_vpn_node; | |
865 | ||
fe08ba7e | 866 | agg_lock_node(new_vpn_node); /* incr refcount */ |
d62a17ae | 867 | |
868 | monitor = mlast ? mlast->next : RFAPI_MONITOR_VPN(par); | |
869 | ||
870 | RFAPI_CHECK_REFCOUNT(par, SAFI_MPLS_VPN, 1); | |
871 | /* decr refcount after we're done with par as this might | |
872 | * free it */ | |
fe08ba7e | 873 | agg_unlock_node(par); |
d62a17ae | 874 | |
875 | continue; | |
876 | } | |
877 | mlast = monitor; | |
878 | monitor = monitor->next; | |
879 | } | |
880 | ||
881 | RFAPI_CHECK_REFCOUNT(new_vpn_node, SAFI_MPLS_VPN, 0); | |
65efcfce LB |
882 | } |
883 | ||
884 | ||
40381db7 | 885 | static void rfapiBgpInfoChainFree(struct bgp_path_info *bpi) |
65efcfce | 886 | { |
4b7e6066 | 887 | struct bgp_path_info *next; |
d62a17ae | 888 | |
40381db7 | 889 | while (bpi) { |
d62a17ae | 890 | |
891 | /* | |
40381db7 | 892 | * If there is a timer waiting to delete this bpi, cancel |
d62a17ae | 893 | * the timer and delete immediately |
894 | */ | |
40381db7 DS |
895 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
896 | && bpi->extra->vnc.import.timer) { | |
d62a17ae | 897 | |
898 | struct thread *t = | |
40381db7 | 899 | (struct thread *)bpi->extra->vnc.import.timer; |
d62a17ae | 900 | struct rfapi_withdraw *wcb = t->arg; |
901 | ||
902 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
903 | thread_cancel(t); | |
904 | } | |
905 | ||
40381db7 DS |
906 | next = bpi->next; |
907 | bpi->next = NULL; | |
908 | rfapiBgpInfoFree(bpi); | |
909 | bpi = next; | |
d62a17ae | 910 | } |
65efcfce LB |
911 | } |
912 | ||
d62a17ae | 913 | static void rfapiImportTableFlush(struct rfapi_import_table *it) |
65efcfce | 914 | { |
d62a17ae | 915 | afi_t afi; |
916 | ||
917 | /* | |
918 | * Free ecommunity | |
919 | */ | |
920 | ecommunity_free(&it->rt_import_list); | |
921 | it->rt_import_list = NULL; | |
922 | ||
923 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
924 | ||
fe08ba7e | 925 | struct agg_node *rn; |
d62a17ae | 926 | |
fe08ba7e DS |
927 | for (rn = agg_route_top(it->imported_vpn[afi]); rn; |
928 | rn = agg_route_next(rn)) { | |
d62a17ae | 929 | /* |
930 | * Each route_node has: | |
931 | * aggregate: points to rfapi_it_extra with monitor | |
932 | * chain(s) | |
9b6d8fcf | 933 | * info: points to chain of bgp_path_info |
d62a17ae | 934 | */ |
9b6d8fcf | 935 | /* free bgp_path_info and its children */ |
d62a17ae | 936 | rfapiBgpInfoChainFree(rn->info); |
937 | rn->info = NULL; | |
938 | ||
939 | rfapiMonitorExtraFlush(SAFI_MPLS_VPN, rn); | |
940 | } | |
941 | ||
fe08ba7e DS |
942 | for (rn = agg_route_top(it->imported_encap[afi]); rn; |
943 | rn = agg_route_next(rn)) { | |
9b6d8fcf | 944 | /* free bgp_path_info and its children */ |
d62a17ae | 945 | rfapiBgpInfoChainFree(rn->info); |
946 | rn->info = NULL; | |
947 | ||
948 | rfapiMonitorExtraFlush(SAFI_ENCAP, rn); | |
949 | } | |
950 | ||
fe08ba7e DS |
951 | agg_table_finish(it->imported_vpn[afi]); |
952 | agg_table_finish(it->imported_encap[afi]); | |
d62a17ae | 953 | } |
954 | if (it->monitor_exterior_orphans) { | |
955 | skiplist_free(it->monitor_exterior_orphans); | |
956 | } | |
65efcfce LB |
957 | } |
958 | ||
d62a17ae | 959 | void rfapiImportTableRefDelByIt(struct bgp *bgp, |
960 | struct rfapi_import_table *it_target) | |
65efcfce | 961 | { |
d62a17ae | 962 | struct rfapi *h; |
963 | struct rfapi_import_table *it; | |
964 | struct rfapi_import_table *prev = NULL; | |
965 | ||
966 | assert(it_target); | |
967 | ||
968 | h = bgp->rfapi; | |
969 | assert(h); | |
970 | ||
971 | for (it = h->imports; it; prev = it, it = it->next) { | |
972 | if (it == it_target) | |
973 | break; | |
974 | } | |
975 | ||
976 | assert(it); | |
977 | assert(it->refcount); | |
978 | ||
979 | it->refcount -= 1; | |
980 | ||
981 | if (!it->refcount) { | |
982 | if (prev) { | |
983 | prev->next = it->next; | |
984 | } else { | |
985 | h->imports = it->next; | |
986 | } | |
987 | rfapiImportTableFlush(it); | |
988 | XFREE(MTYPE_RFAPI_IMPORTTABLE, it); | |
989 | } | |
65efcfce LB |
990 | } |
991 | ||
992 | #if RFAPI_REQUIRE_ENCAP_BEEC | |
993 | /* | |
994 | * Look for magic BGP Encapsulation Extended Community value | |
995 | * Format in RFC 5512 Sect. 4.5 | |
996 | */ | |
d62a17ae | 997 | static int rfapiEcommunitiesMatchBeec(struct ecommunity *ecom, |
998 | bgp_encap_types type) | |
65efcfce | 999 | { |
d62a17ae | 1000 | int i; |
65efcfce | 1001 | |
d62a17ae | 1002 | if (!ecom) |
1003 | return 0; | |
65efcfce | 1004 | |
d62a17ae | 1005 | for (i = 0; i < (ecom->size * ECOMMUNITY_SIZE); i += ECOMMUNITY_SIZE) { |
65efcfce | 1006 | |
d62a17ae | 1007 | uint8_t *ep; |
65efcfce | 1008 | |
d62a17ae | 1009 | ep = ecom->val + i; |
65efcfce | 1010 | |
d62a17ae | 1011 | if (ep[0] == ECOMMUNITY_ENCODE_OPAQUE |
1012 | && ep[1] == ECOMMUNITY_OPAQUE_SUBTYPE_ENCAP | |
1013 | && ep[6] == ((type && 0xff00) >> 8) | |
1014 | && ep[7] == (type & 0xff)) { | |
65efcfce | 1015 | |
d62a17ae | 1016 | return 1; |
1017 | } | |
1018 | } | |
1019 | return 0; | |
65efcfce LB |
1020 | } |
1021 | #endif | |
1022 | ||
d62a17ae | 1023 | int rfapiEcommunitiesIntersect(struct ecommunity *e1, struct ecommunity *e2) |
65efcfce | 1024 | { |
d62a17ae | 1025 | int i, j; |
1026 | ||
1027 | if (!e1 || !e2) | |
1028 | return 0; | |
1029 | ||
1030 | { | |
1031 | char *s1, *s2; | |
1032 | s1 = ecommunity_ecom2str(e1, ECOMMUNITY_FORMAT_DISPLAY, 0); | |
1033 | s2 = ecommunity_ecom2str(e2, ECOMMUNITY_FORMAT_DISPLAY, 0); | |
1034 | vnc_zlog_debug_verbose("%s: e1[%s], e2[%s]", __func__, s1, s2); | |
1035 | XFREE(MTYPE_ECOMMUNITY_STR, s1); | |
1036 | XFREE(MTYPE_ECOMMUNITY_STR, s2); | |
1037 | } | |
1038 | ||
1039 | for (i = 0; i < e1->size; ++i) { | |
1040 | for (j = 0; j < e2->size; ++j) { | |
1041 | if (!memcmp(e1->val + (i * ECOMMUNITY_SIZE), | |
1042 | e2->val + (j * ECOMMUNITY_SIZE), | |
1043 | ECOMMUNITY_SIZE)) { | |
1044 | ||
1045 | return 1; | |
1046 | } | |
1047 | } | |
1048 | } | |
1049 | return 0; | |
65efcfce LB |
1050 | } |
1051 | ||
d62a17ae | 1052 | int rfapiEcommunityGetLNI(struct ecommunity *ecom, uint32_t *lni) |
65efcfce | 1053 | { |
d62a17ae | 1054 | if (ecom) { |
1055 | int i; | |
1056 | for (i = 0; i < ecom->size; ++i) { | |
1057 | uint8_t *p = ecom->val + (i * ECOMMUNITY_SIZE); | |
1058 | ||
1059 | if ((*(p + 0) == 0x00) && (*(p + 1) == 0x02)) { | |
1060 | ||
1061 | *lni = (*(p + 5) << 16) | (*(p + 6) << 8) | |
1062 | | (*(p + 7)); | |
1063 | return 0; | |
1064 | } | |
1065 | } | |
1066 | } | |
1067 | return ENOENT; | |
65efcfce LB |
1068 | } |
1069 | ||
d62a17ae | 1070 | int rfapiEcommunityGetEthernetTag(struct ecommunity *ecom, uint16_t *tag_id) |
79799987 | 1071 | { |
d62a17ae | 1072 | struct bgp *bgp = bgp_get_default(); |
1073 | *tag_id = 0; /* default to untagged */ | |
1074 | if (ecom) { | |
1075 | int i; | |
1076 | for (i = 0; i < ecom->size; ++i) { | |
1077 | as_t as = 0; | |
1078 | int encode = 0; | |
1079 | uint8_t *p = ecom->val + (i * ECOMMUNITY_SIZE); | |
1080 | ||
1081 | /* High-order octet of type. */ | |
1082 | encode = *p++; | |
1083 | ||
1084 | if (*p++ == ECOMMUNITY_ROUTE_TARGET) { | |
1085 | if (encode == ECOMMUNITY_ENCODE_AS4) { | |
937652c6 | 1086 | p = ptr_get_be32(p, &as); |
d62a17ae | 1087 | } else if (encode == ECOMMUNITY_ENCODE_AS) { |
1088 | as = (*p++ << 8); | |
1089 | as |= (*p++); | |
996c9314 LB |
1090 | p += 2; /* skip next two, tag/vid |
1091 | always in lowest bytes */ | |
d62a17ae | 1092 | } |
1093 | if (as == bgp->as) { | |
1094 | *tag_id = *p++ << 8; | |
1095 | *tag_id |= (*p++); | |
1096 | return 0; | |
1097 | } | |
1098 | } | |
1099 | } | |
1100 | } | |
1101 | return ENOENT; | |
79799987 LB |
1102 | } |
1103 | ||
40381db7 | 1104 | static int rfapiVpnBiNhEqualsPt(struct bgp_path_info *bpi, |
4b7e6066 | 1105 | struct rfapi_ip_addr *hpt) |
65efcfce | 1106 | { |
d62a17ae | 1107 | uint8_t family; |
65efcfce | 1108 | |
40381db7 | 1109 | if (!hpt || !bpi) |
d62a17ae | 1110 | return 0; |
65efcfce | 1111 | |
40381db7 | 1112 | family = BGP_MP_NEXTHOP_FAMILY(bpi->attr->mp_nexthop_len); |
65efcfce | 1113 | |
d62a17ae | 1114 | if (hpt->addr_family != family) |
1115 | return 0; | |
65efcfce | 1116 | |
d62a17ae | 1117 | switch (family) { |
1118 | case AF_INET: | |
40381db7 | 1119 | if (bpi->attr->mp_nexthop_global_in.s_addr |
d62a17ae | 1120 | != hpt->addr.v4.s_addr) |
1121 | return 0; | |
1122 | break; | |
65efcfce | 1123 | |
d62a17ae | 1124 | case AF_INET6: |
40381db7 | 1125 | if (IPV6_ADDR_CMP(&bpi->attr->mp_nexthop_global, &hpt->addr.v6)) |
d62a17ae | 1126 | return 0; |
1127 | break; | |
65efcfce | 1128 | |
d62a17ae | 1129 | default: |
1130 | return 0; | |
1131 | break; | |
1132 | } | |
65efcfce | 1133 | |
d62a17ae | 1134 | return 1; |
65efcfce LB |
1135 | } |
1136 | ||
1137 | ||
1138 | /* | |
1139 | * Compare 2 VPN BIs. Return true if they have the same VN and UN addresses | |
1140 | */ | |
40381db7 DS |
1141 | static int rfapiVpnBiSamePtUn(struct bgp_path_info *bpi1, |
1142 | struct bgp_path_info *bpi2) | |
65efcfce | 1143 | { |
d62a17ae | 1144 | struct prefix pfx_un1; |
1145 | struct prefix pfx_un2; | |
1146 | ||
40381db7 | 1147 | if (!bpi1 || !bpi2) |
d62a17ae | 1148 | return 0; |
1149 | ||
40381db7 | 1150 | if (!bpi1->attr || !bpi2->attr) |
d62a17ae | 1151 | return 0; |
1152 | ||
1153 | /* | |
1154 | * VN address comparisons | |
1155 | */ | |
1156 | ||
40381db7 DS |
1157 | if (BGP_MP_NEXTHOP_FAMILY(bpi1->attr->mp_nexthop_len) |
1158 | != BGP_MP_NEXTHOP_FAMILY(bpi2->attr->mp_nexthop_len)) { | |
d62a17ae | 1159 | return 0; |
1160 | } | |
1161 | ||
40381db7 | 1162 | switch (BGP_MP_NEXTHOP_FAMILY(bpi1->attr->mp_nexthop_len)) { |
d62a17ae | 1163 | case AF_INET: |
40381db7 DS |
1164 | if (bpi1->attr->mp_nexthop_global_in.s_addr |
1165 | != bpi2->attr->mp_nexthop_global_in.s_addr) | |
d62a17ae | 1166 | return 0; |
1167 | break; | |
1168 | ||
1169 | case AF_INET6: | |
40381db7 DS |
1170 | if (IPV6_ADDR_CMP(&bpi1->attr->mp_nexthop_global, |
1171 | &bpi2->attr->mp_nexthop_global)) | |
d62a17ae | 1172 | return 0; |
1173 | break; | |
1174 | ||
1175 | default: | |
1176 | return 0; | |
1177 | break; | |
1178 | } | |
1179 | ||
1180 | /* | |
1181 | * UN address comparisons | |
1182 | */ | |
40381db7 DS |
1183 | if (rfapiGetVncTunnelUnAddr(bpi1->attr, &pfx_un1)) { |
1184 | if (bpi1->extra) { | |
1185 | pfx_un1.family = bpi1->extra->vnc.import.un_family; | |
1186 | switch (bpi1->extra->vnc.import.un_family) { | |
d62a17ae | 1187 | case AF_INET: |
1188 | pfx_un1.u.prefix4 = | |
40381db7 | 1189 | bpi1->extra->vnc.import.un.addr4; |
d62a17ae | 1190 | break; |
1191 | case AF_INET6: | |
1192 | pfx_un1.u.prefix6 = | |
40381db7 | 1193 | bpi1->extra->vnc.import.un.addr6; |
d62a17ae | 1194 | break; |
1195 | default: | |
1196 | pfx_un1.family = 0; | |
1197 | break; | |
1198 | } | |
1199 | } | |
1200 | } | |
1201 | ||
40381db7 DS |
1202 | if (rfapiGetVncTunnelUnAddr(bpi2->attr, &pfx_un2)) { |
1203 | if (bpi2->extra) { | |
1204 | pfx_un2.family = bpi2->extra->vnc.import.un_family; | |
1205 | switch (bpi2->extra->vnc.import.un_family) { | |
d62a17ae | 1206 | case AF_INET: |
1207 | pfx_un2.u.prefix4 = | |
40381db7 | 1208 | bpi2->extra->vnc.import.un.addr4; |
d62a17ae | 1209 | break; |
1210 | case AF_INET6: | |
1211 | pfx_un2.u.prefix6 = | |
40381db7 | 1212 | bpi2->extra->vnc.import.un.addr6; |
d62a17ae | 1213 | break; |
1214 | default: | |
1215 | pfx_un2.family = 0; | |
1216 | break; | |
1217 | } | |
1218 | } | |
1219 | } | |
1220 | ||
1221 | if (!pfx_un1.family || !pfx_un2.family) | |
1222 | return 0; | |
1223 | ||
1224 | if (pfx_un1.family != pfx_un2.family) | |
1225 | return 0; | |
1226 | ||
1227 | switch (pfx_un1.family) { | |
1228 | case AF_INET: | |
996c9314 | 1229 | if (!IPV4_ADDR_SAME(&pfx_un1.u.prefix4, &pfx_un2.u.prefix4)) |
d62a17ae | 1230 | return 0; |
1231 | break; | |
1232 | case AF_INET6: | |
1233 | if (!IPV6_ADDR_SAME(&pfx_un1.u.prefix6, &pfx_un2.u.prefix6)) | |
1234 | return 0; | |
1235 | break; | |
1236 | } | |
1237 | ||
1238 | ||
1239 | return 1; | |
65efcfce LB |
1240 | } |
1241 | ||
d62a17ae | 1242 | uint8_t rfapiRfpCost(struct attr *attr) |
65efcfce | 1243 | { |
d62a17ae | 1244 | if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF)) { |
1245 | if (attr->local_pref > 255) { | |
1246 | return 0; | |
1247 | } | |
1248 | return 255 - attr->local_pref; | |
1249 | } | |
1250 | ||
1251 | return 255; | |
65efcfce LB |
1252 | } |
1253 | ||
1254 | /*------------------------------------------ | |
1255 | * rfapi_extract_l2o | |
1256 | * | |
d62a17ae | 1257 | * Find Layer 2 options in an option chain |
65efcfce | 1258 | * |
d62a17ae | 1259 | * input: |
65efcfce LB |
1260 | * pHop option chain |
1261 | * | |
1262 | * output: | |
1263 | * l2o layer 2 options extracted | |
1264 | * | |
1265 | * return value: | |
1266 | * 0 OK | |
1267 | * 1 no options found | |
1268 | * | |
1269 | --------------------------------------------*/ | |
d62a17ae | 1270 | int rfapi_extract_l2o( |
1271 | struct bgp_tea_options *pHop, /* chain of options */ | |
1272 | struct rfapi_l2address_option *l2o) /* return extracted value */ | |
65efcfce | 1273 | { |
d62a17ae | 1274 | struct bgp_tea_options *p; |
65efcfce | 1275 | |
d62a17ae | 1276 | for (p = pHop; p; p = p->next) { |
1277 | if ((p->type == RFAPI_VN_OPTION_TYPE_L2ADDR) | |
1278 | && (p->length >= 8)) { | |
65efcfce | 1279 | |
d62a17ae | 1280 | char *v = p->value; |
65efcfce | 1281 | |
d62a17ae | 1282 | memcpy(&l2o->macaddr, v, 6); |
65efcfce | 1283 | |
d62a17ae | 1284 | l2o->label = ((v[6] << 12) & 0xff000) |
1285 | + ((v[7] << 4) & 0xff0) | |
1286 | + ((v[8] >> 4) & 0xf); | |
65efcfce | 1287 | |
d62a17ae | 1288 | l2o->local_nve_id = (uint8_t)v[10]; |
65efcfce | 1289 | |
d62a17ae | 1290 | l2o->logical_net_id = |
1291 | (v[11] << 16) + (v[12] << 8) + (v[13] << 0); | |
65efcfce | 1292 | |
d62a17ae | 1293 | return 0; |
1294 | } | |
1295 | } | |
1296 | return 1; | |
65efcfce LB |
1297 | } |
1298 | ||
1299 | static struct rfapi_next_hop_entry * | |
d62a17ae | 1300 | rfapiRouteInfo2NextHopEntry(struct rfapi_ip_prefix *rprefix, |
40381db7 DS |
1301 | struct bgp_path_info *bpi, /* route to encode */ |
1302 | uint32_t lifetime, /* use this in nhe */ | |
1303 | struct agg_node *rn) /* req for L2 eth addr */ | |
65efcfce | 1304 | { |
d62a17ae | 1305 | struct rfapi_next_hop_entry *new; |
1306 | int have_vnc_tunnel_un = 0; | |
65efcfce LB |
1307 | |
1308 | #if DEBUG_ENCAP_MONITOR | |
40381db7 | 1309 | vnc_zlog_debug_verbose("%s: entry, bpi %p, rn %p", __func__, bpi, rn); |
65efcfce LB |
1310 | #endif |
1311 | ||
d62a17ae | 1312 | new = XCALLOC(MTYPE_RFAPI_NEXTHOP, sizeof(struct rfapi_next_hop_entry)); |
1313 | assert(new); | |
1314 | ||
1315 | new->prefix = *rprefix; | |
1316 | ||
40381db7 DS |
1317 | if (bpi->extra |
1318 | && decode_rd_type(bpi->extra->vnc.import.rd.val) | |
d62a17ae | 1319 | == RD_TYPE_VNC_ETH) { |
1320 | /* ethernet */ | |
1321 | ||
1322 | struct rfapi_vn_option *vo; | |
1323 | ||
1324 | vo = XCALLOC(MTYPE_RFAPI_VN_OPTION, | |
1325 | sizeof(struct rfapi_vn_option)); | |
1326 | assert(vo); | |
1327 | ||
1328 | vo->type = RFAPI_VN_OPTION_TYPE_L2ADDR; | |
1329 | ||
1330 | memcpy(&vo->v.l2addr.macaddr, &rn->p.u.prefix_eth.octet, | |
28328ea9 | 1331 | ETH_ALEN); |
d62a17ae | 1332 | /* only low 3 bytes of this are significant */ |
40381db7 | 1333 | if (bpi->attr) { |
d62a17ae | 1334 | (void)rfapiEcommunityGetLNI( |
40381db7 | 1335 | bpi->attr->ecommunity, |
d62a17ae | 1336 | &vo->v.l2addr.logical_net_id); |
1337 | (void)rfapiEcommunityGetEthernetTag( | |
40381db7 | 1338 | bpi->attr->ecommunity, &vo->v.l2addr.tag_id); |
d62a17ae | 1339 | } |
1340 | ||
1341 | /* local_nve_id comes from lower byte of RD type */ | |
40381db7 | 1342 | vo->v.l2addr.local_nve_id = bpi->extra->vnc.import.rd.val[1]; |
d62a17ae | 1343 | |
1344 | /* label comes from MP_REACH_NLRI label */ | |
40381db7 | 1345 | vo->v.l2addr.label = decode_label(&bpi->extra->label[0]); |
d62a17ae | 1346 | |
1347 | new->vn_options = vo; | |
1348 | ||
1349 | /* | |
1350 | * If there is an auxiliary prefix (i.e., host IP address), | |
1351 | * use it as the nexthop prefix instead of the query prefix | |
1352 | */ | |
40381db7 DS |
1353 | if (bpi->extra->vnc.import.aux_prefix.family) { |
1354 | rfapiQprefix2Rprefix(&bpi->extra->vnc.import.aux_prefix, | |
d62a17ae | 1355 | &new->prefix); |
1356 | } | |
1357 | } | |
1358 | ||
40381db7 | 1359 | if (bpi->attr) { |
d62a17ae | 1360 | bgp_encap_types tun_type; |
40381db7 | 1361 | new->prefix.cost = rfapiRfpCost(bpi->attr); |
d62a17ae | 1362 | |
1363 | struct bgp_attr_encap_subtlv *pEncap; | |
1364 | ||
40381db7 | 1365 | switch (BGP_MP_NEXTHOP_FAMILY(bpi->attr->mp_nexthop_len)) { |
d62a17ae | 1366 | case AF_INET: |
1367 | new->vn_address.addr_family = AF_INET; | |
1368 | new->vn_address.addr.v4 = | |
40381db7 | 1369 | bpi->attr->mp_nexthop_global_in; |
d62a17ae | 1370 | break; |
1371 | ||
1372 | case AF_INET6: | |
1373 | new->vn_address.addr_family = AF_INET6; | |
40381db7 | 1374 | new->vn_address.addr.v6 = bpi->attr->mp_nexthop_global; |
d62a17ae | 1375 | break; |
1376 | ||
1377 | default: | |
1378 | zlog_warn("%s: invalid vpn nexthop length: %d", | |
40381db7 | 1379 | __func__, bpi->attr->mp_nexthop_len); |
d62a17ae | 1380 | rfapi_free_next_hop_list(new); |
1381 | return NULL; | |
1382 | } | |
1383 | ||
40381db7 | 1384 | for (pEncap = bpi->attr->vnc_subtlvs; pEncap; |
d62a17ae | 1385 | pEncap = pEncap->next) { |
1386 | switch (pEncap->type) { | |
1387 | case BGP_VNC_SUBTLV_TYPE_LIFETIME: | |
1388 | /* use configured lifetime, not attr lifetime */ | |
1389 | break; | |
1390 | ||
1391 | default: | |
1392 | zlog_warn("%s: unknown VNC option type %d", | |
1393 | __func__, pEncap->type); | |
1394 | ||
1395 | ||
1396 | break; | |
1397 | } | |
1398 | } | |
1399 | ||
40381db7 | 1400 | rfapiGetTunnelType(bpi->attr, &tun_type); |
d62a17ae | 1401 | if (tun_type == BGP_ENCAP_TYPE_MPLS) { |
1402 | struct prefix p; | |
1403 | /* MPLS carries UN address in next hop */ | |
40381db7 | 1404 | rfapiNexthop2Prefix(bpi->attr, &p); |
d62a17ae | 1405 | if (p.family != 0) { |
1406 | rfapiQprefix2Raddr(&p, &new->un_address); | |
1407 | have_vnc_tunnel_un = 1; | |
1408 | } | |
1409 | } | |
1410 | ||
40381db7 | 1411 | for (pEncap = bpi->attr->encap_subtlvs; pEncap; |
d62a17ae | 1412 | pEncap = pEncap->next) { |
1413 | switch (pEncap->type) { | |
1414 | case BGP_ENCAP_SUBTLV_TYPE_REMOTE_ENDPOINT: | |
1415 | /* | |
1416 | * Overrides ENCAP UN address, if any | |
1417 | */ | |
1418 | switch (pEncap->length) { | |
1419 | ||
1420 | case 8: | |
1421 | new->un_address.addr_family = AF_INET; | |
1422 | memcpy(&new->un_address.addr.v4, | |
1423 | pEncap->value, 4); | |
1424 | have_vnc_tunnel_un = 1; | |
1425 | break; | |
1426 | ||
1427 | case 20: | |
1428 | new->un_address.addr_family = AF_INET6; | |
1429 | memcpy(&new->un_address.addr.v6, | |
1430 | pEncap->value, 16); | |
1431 | have_vnc_tunnel_un = 1; | |
1432 | break; | |
1433 | ||
1434 | default: | |
1435 | zlog_warn( | |
40381db7 DS |
1436 | "%s: invalid tunnel subtlv UN addr length (%d) for bpi %p", |
1437 | __func__, pEncap->length, bpi); | |
d62a17ae | 1438 | } |
1439 | break; | |
1440 | ||
1441 | default: | |
1442 | zlog_warn( | |
1443 | "%s: unknown Encap Attribute option type %d", | |
1444 | __func__, pEncap->type); | |
1445 | ||
1446 | ||
1447 | break; | |
1448 | } | |
1449 | } | |
1450 | ||
40381db7 | 1451 | new->un_options = rfapi_encap_tlv_to_un_option(bpi->attr); |
65efcfce LB |
1452 | |
1453 | #if DEBUG_ENCAP_MONITOR | |
d62a17ae | 1454 | vnc_zlog_debug_verbose("%s: line %d: have_vnc_tunnel_un=%d", |
1455 | __func__, __LINE__, have_vnc_tunnel_un); | |
65efcfce LB |
1456 | #endif |
1457 | ||
40381db7 | 1458 | if (!have_vnc_tunnel_un && bpi->extra) { |
d62a17ae | 1459 | /* |
1460 | * use cached UN address from ENCAP route | |
1461 | */ | |
1462 | new->un_address.addr_family = | |
40381db7 | 1463 | bpi->extra->vnc.import.un_family; |
d62a17ae | 1464 | switch (new->un_address.addr_family) { |
1465 | case AF_INET: | |
1466 | new->un_address.addr.v4 = | |
40381db7 | 1467 | bpi->extra->vnc.import.un.addr4; |
d62a17ae | 1468 | break; |
1469 | case AF_INET6: | |
1470 | new->un_address.addr.v6 = | |
40381db7 | 1471 | bpi->extra->vnc.import.un.addr6; |
d62a17ae | 1472 | break; |
1473 | default: | |
1474 | zlog_warn( | |
40381db7 | 1475 | "%s: invalid UN addr family (%d) for bpi %p", |
d62a17ae | 1476 | __func__, new->un_address.addr_family, |
40381db7 | 1477 | bpi); |
d62a17ae | 1478 | rfapi_free_next_hop_list(new); |
1479 | return NULL; | |
1480 | break; | |
1481 | } | |
1482 | } | |
1483 | } | |
1484 | ||
1485 | new->lifetime = lifetime; | |
1486 | return new; | |
65efcfce LB |
1487 | } |
1488 | ||
fe08ba7e | 1489 | int rfapiHasNonRemovedRoutes(struct agg_node *rn) |
65efcfce | 1490 | { |
40381db7 | 1491 | struct bgp_path_info *bpi; |
65efcfce | 1492 | |
40381db7 | 1493 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 1494 | struct prefix pfx; |
65efcfce | 1495 | |
40381db7 DS |
1496 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
1497 | && (bpi->extra && !rfapiGetUnAddrOfVpnBi(bpi, &pfx))) { | |
65efcfce | 1498 | |
d62a17ae | 1499 | return 1; |
1500 | } | |
1501 | } | |
1502 | return 0; | |
65efcfce LB |
1503 | } |
1504 | ||
1505 | #if DEBUG_IT_NODES | |
d62a17ae | 1506 | /* |
65efcfce LB |
1507 | * DEBUG FUNCTION |
1508 | */ | |
fe08ba7e | 1509 | void rfapiDumpNode(struct agg_node *rn) |
65efcfce | 1510 | { |
40381db7 | 1511 | struct bgp_path_info *bpi; |
d62a17ae | 1512 | |
1513 | vnc_zlog_debug_verbose("%s: rn=%p", __func__, rn); | |
40381db7 | 1514 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 1515 | struct prefix pfx; |
40381db7 | 1516 | int ctrc = rfapiGetUnAddrOfVpnBi(bpi, &pfx); |
d62a17ae | 1517 | int nr; |
1518 | ||
40381db7 DS |
1519 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
1520 | && (bpi->extra && !ctrc)) { | |
d62a17ae | 1521 | |
1522 | nr = 1; | |
1523 | } else { | |
1524 | nr = 0; | |
1525 | } | |
1526 | ||
1527 | vnc_zlog_debug_verbose( | |
40381db7 DS |
1528 | " bpi=%p, nr=%d, flags=0x%x, extra=%p, ctrc=%d", bpi, |
1529 | nr, bpi->flags, bpi->extra, ctrc); | |
d62a17ae | 1530 | } |
65efcfce LB |
1531 | } |
1532 | #endif | |
1533 | ||
d62a17ae | 1534 | static int rfapiNhlAddNodeRoutes( |
fe08ba7e | 1535 | struct agg_node *rn, /* in */ |
d62a17ae | 1536 | struct rfapi_ip_prefix *rprefix, /* in */ |
1537 | uint32_t lifetime, /* in */ | |
1538 | int removed, /* in */ | |
1539 | struct rfapi_next_hop_entry **head, /* in/out */ | |
1540 | struct rfapi_next_hop_entry **tail, /* in/out */ | |
1541 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
fe08ba7e | 1542 | struct agg_node *rfd_rib_node, /* preload this NVE rib node */ |
d62a17ae | 1543 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1544 | { |
40381db7 | 1545 | struct bgp_path_info *bpi; |
d62a17ae | 1546 | struct rfapi_next_hop_entry *new; |
1547 | struct prefix pfx_un; | |
1548 | struct skiplist *seen_nexthops; | |
1549 | int count = 0; | |
1550 | int is_l2 = (rn->p.family == AF_ETHERNET); | |
1551 | ||
fe08ba7e DS |
1552 | if (rfd_rib_node) { |
1553 | struct agg_table *atable = agg_get_table(rfd_rib_node); | |
84cc1207 PZ |
1554 | struct rfapi_descriptor *rfd; |
1555 | ||
fe08ba7e DS |
1556 | if (atable) { |
1557 | rfd = agg_get_table_info(atable); | |
84cc1207 | 1558 | |
fe08ba7e DS |
1559 | if (rfapiRibFTDFilterRecentPrefix(rfd, rn, |
1560 | pfx_target_original)) | |
1561 | return 0; | |
1562 | } | |
d62a17ae | 1563 | } |
1564 | ||
1565 | seen_nexthops = | |
1566 | skiplist_new(0, vnc_prefix_cmp, (void (*)(void *))prefix_free); | |
1567 | ||
40381db7 | 1568 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 1569 | |
1570 | struct prefix pfx_vn; | |
1571 | struct prefix *newpfx; | |
1572 | ||
40381db7 | 1573 | if (removed && !CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
65efcfce | 1574 | #if DEBUG_RETURNED_NHL |
d62a17ae | 1575 | vnc_zlog_debug_verbose( |
1576 | "%s: want holddown, this route not holddown, skip", | |
1577 | __func__); | |
65efcfce | 1578 | #endif |
d62a17ae | 1579 | continue; |
1580 | } | |
40381db7 | 1581 | if (!removed && CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
d62a17ae | 1582 | continue; |
1583 | } | |
1584 | ||
40381db7 | 1585 | if (!bpi->extra) { |
d62a17ae | 1586 | continue; |
1587 | } | |
1588 | ||
1589 | /* | |
1590 | * Check for excluded VN address | |
1591 | */ | |
40381db7 | 1592 | if (rfapiVpnBiNhEqualsPt(bpi, exclude_vnaddr)) |
d62a17ae | 1593 | continue; |
1594 | ||
1595 | /* | |
1596 | * Check for VN address (nexthop) copied already | |
1597 | */ | |
1598 | if (is_l2) { | |
1599 | /* L2 routes: semantic nexthop in aux_prefix; VN addr | |
1600 | * ain't it */ | |
40381db7 | 1601 | pfx_vn = bpi->extra->vnc.import.aux_prefix; |
d62a17ae | 1602 | } else { |
40381db7 | 1603 | rfapiNexthop2Prefix(bpi->attr, &pfx_vn); |
d62a17ae | 1604 | } |
1605 | if (!skiplist_search(seen_nexthops, &pfx_vn, NULL)) { | |
65efcfce | 1606 | #if DEBUG_RETURNED_NHL |
872ed4c7 | 1607 | char buf[PREFIX_STRLEN]; |
65efcfce | 1608 | |
872ed4c7 | 1609 | prefix2str(&pfx_vn, buf, sizeof(buf)); |
d62a17ae | 1610 | vnc_zlog_debug_verbose( |
1611 | "%s: already put VN/nexthop %s, skip", __func__, | |
1612 | buf); | |
65efcfce | 1613 | #endif |
d62a17ae | 1614 | continue; |
1615 | } | |
65efcfce | 1616 | |
40381db7 | 1617 | if (rfapiGetUnAddrOfVpnBi(bpi, &pfx_un)) { |
65efcfce | 1618 | #if DEBUG_ENCAP_MONITOR |
d62a17ae | 1619 | vnc_zlog_debug_verbose( |
40381db7 | 1620 | "%s: failed to get UN address of this VPN bpi", |
d62a17ae | 1621 | __func__); |
65efcfce | 1622 | #endif |
d62a17ae | 1623 | continue; |
1624 | } | |
1625 | ||
1626 | newpfx = prefix_new(); | |
1627 | *newpfx = pfx_vn; | |
1628 | skiplist_insert(seen_nexthops, newpfx, newpfx); | |
1629 | ||
40381db7 | 1630 | new = rfapiRouteInfo2NextHopEntry(rprefix, bpi, lifetime, rn); |
d62a17ae | 1631 | if (new) { |
1632 | if (rfapiRibPreloadBi(rfd_rib_node, &pfx_vn, &pfx_un, | |
40381db7 | 1633 | lifetime, bpi)) { |
d62a17ae | 1634 | /* duplicate filtered by RIB */ |
1635 | rfapi_free_next_hop_list(new); | |
1636 | new = NULL; | |
1637 | } | |
1638 | } | |
1639 | ||
1640 | if (new) { | |
1641 | if (*tail) { | |
1642 | (*tail)->next = new; | |
1643 | } else { | |
1644 | *head = new; | |
1645 | } | |
1646 | *tail = new; | |
1647 | ++count; | |
1648 | } | |
1649 | } | |
1650 | ||
1651 | skiplist_free(seen_nexthops); | |
1652 | ||
1653 | return count; | |
65efcfce LB |
1654 | } |
1655 | ||
1656 | ||
1657 | /* | |
1658 | * Breadth-first | |
1659 | * | |
1660 | * omit_node is meant for the situation where we are adding a subtree | |
1661 | * of a parent of some original requested node. The response already | |
1662 | * contains the original requested node, and we don't want to duplicate | |
1663 | * its routes in the list, so we skip it if the right or left node | |
1664 | * matches (of course, we still travel down its child subtrees). | |
1665 | */ | |
d62a17ae | 1666 | static int rfapiNhlAddSubtree( |
fe08ba7e | 1667 | struct agg_node *rn, /* in */ |
d62a17ae | 1668 | uint32_t lifetime, /* in */ |
1669 | struct rfapi_next_hop_entry **head, /* in/out */ | |
1670 | struct rfapi_next_hop_entry **tail, /* in/out */ | |
fe08ba7e | 1671 | struct agg_node *omit_node, /* in */ |
d62a17ae | 1672 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ |
fe08ba7e | 1673 | struct agg_table *rfd_rib_table, /* preload here */ |
d62a17ae | 1674 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1675 | { |
d62a17ae | 1676 | struct rfapi_ip_prefix rprefix; |
1677 | int rcount = 0; | |
1678 | ||
1679 | /* FIXME: need to find a better way here to work without sticking our | |
1680 | * hands in node->link */ | |
fe08ba7e DS |
1681 | if (agg_node_left(rn) && agg_node_left(rn) != omit_node) { |
1682 | if (agg_node_left(rn)->info) { | |
d62a17ae | 1683 | int count = 0; |
fe08ba7e | 1684 | struct agg_node *rib_rn = NULL; |
d62a17ae | 1685 | |
fe08ba7e | 1686 | rfapiQprefix2Rprefix(&agg_node_left(rn)->p, &rprefix); |
d62a17ae | 1687 | if (rfd_rib_table) { |
fe08ba7e DS |
1688 | rib_rn = agg_node_get(rfd_rib_table, |
1689 | &agg_node_left(rn)->p); | |
d62a17ae | 1690 | } |
1691 | ||
1692 | count = rfapiNhlAddNodeRoutes( | |
fe08ba7e DS |
1693 | agg_node_left(rn), &rprefix, lifetime, 0, head, |
1694 | tail, exclude_vnaddr, rib_rn, | |
1695 | pfx_target_original); | |
d62a17ae | 1696 | if (!count) { |
1697 | count = rfapiNhlAddNodeRoutes( | |
fe08ba7e DS |
1698 | agg_node_left(rn), &rprefix, lifetime, |
1699 | 1, head, tail, exclude_vnaddr, rib_rn, | |
d62a17ae | 1700 | pfx_target_original); |
1701 | } | |
1702 | rcount += count; | |
1703 | if (rib_rn) | |
fe08ba7e | 1704 | agg_unlock_node(rib_rn); |
d62a17ae | 1705 | } |
1706 | } | |
1707 | ||
fe08ba7e DS |
1708 | if (agg_node_right(rn) && agg_node_right(rn) != omit_node) { |
1709 | if (agg_node_right(rn)->info) { | |
d62a17ae | 1710 | int count = 0; |
fe08ba7e | 1711 | struct agg_node *rib_rn = NULL; |
d62a17ae | 1712 | |
fe08ba7e | 1713 | rfapiQprefix2Rprefix(&agg_node_right(rn)->p, &rprefix); |
d62a17ae | 1714 | if (rfd_rib_table) { |
fe08ba7e DS |
1715 | rib_rn = agg_node_get(rfd_rib_table, |
1716 | &agg_node_right(rn)->p); | |
d62a17ae | 1717 | } |
1718 | count = rfapiNhlAddNodeRoutes( | |
fe08ba7e DS |
1719 | agg_node_right(rn), &rprefix, lifetime, 0, head, |
1720 | tail, exclude_vnaddr, rib_rn, | |
1721 | pfx_target_original); | |
d62a17ae | 1722 | if (!count) { |
1723 | count = rfapiNhlAddNodeRoutes( | |
fe08ba7e DS |
1724 | agg_node_right(rn), &rprefix, lifetime, |
1725 | 1, head, tail, exclude_vnaddr, rib_rn, | |
d62a17ae | 1726 | pfx_target_original); |
1727 | } | |
1728 | rcount += count; | |
1729 | if (rib_rn) | |
fe08ba7e | 1730 | agg_unlock_node(rib_rn); |
d62a17ae | 1731 | } |
1732 | } | |
1733 | ||
fe08ba7e | 1734 | if (agg_node_left(rn)) { |
d62a17ae | 1735 | rcount += rfapiNhlAddSubtree( |
fe08ba7e | 1736 | agg_node_left(rn), lifetime, head, tail, omit_node, |
d62a17ae | 1737 | exclude_vnaddr, rfd_rib_table, pfx_target_original); |
1738 | } | |
fe08ba7e | 1739 | if (agg_node_right(rn)) { |
d62a17ae | 1740 | rcount += rfapiNhlAddSubtree( |
fe08ba7e | 1741 | agg_node_right(rn), lifetime, head, tail, omit_node, |
d62a17ae | 1742 | exclude_vnaddr, rfd_rib_table, pfx_target_original); |
1743 | } | |
1744 | ||
1745 | return rcount; | |
65efcfce LB |
1746 | } |
1747 | ||
1748 | /* | |
1749 | * Implementation of ROUTE_LIST(node) from RFAPI-Import-Event-Handling.txt | |
1750 | * | |
1751 | * Construct an rfapi nexthop list based on the routes attached to | |
1752 | * the specified node. | |
1753 | * | |
1defdda8 DS |
1754 | * If there are any routes that do NOT have BGP_PATH_REMOVED set, |
1755 | * return those only. If there are ONLY routes with BGP_PATH_REMOVED, | |
65efcfce LB |
1756 | * then return those, and also include all the non-removed routes from the |
1757 | * next less-specific node (i.e., this node's parent) at the end. | |
1758 | */ | |
d62a17ae | 1759 | struct rfapi_next_hop_entry *rfapiRouteNode2NextHopList( |
fe08ba7e DS |
1760 | struct agg_node *rn, uint32_t lifetime, /* put into nexthop entries */ |
1761 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
1762 | struct agg_table *rfd_rib_table, /* preload here */ | |
1763 | struct prefix *pfx_target_original) /* query target */ | |
65efcfce | 1764 | { |
d62a17ae | 1765 | struct rfapi_ip_prefix rprefix; |
1766 | struct rfapi_next_hop_entry *answer = NULL; | |
1767 | struct rfapi_next_hop_entry *last = NULL; | |
fe08ba7e | 1768 | struct agg_node *parent; |
d62a17ae | 1769 | int count = 0; |
fe08ba7e | 1770 | struct agg_node *rib_rn; |
65efcfce LB |
1771 | |
1772 | #if DEBUG_RETURNED_NHL | |
d62a17ae | 1773 | { |
872ed4c7 | 1774 | char buf[PREFIX_STRLEN]; |
d62a17ae | 1775 | |
872ed4c7 | 1776 | prefix2str(&rn->p, buf, sizeof(buf)); |
d62a17ae | 1777 | vnc_zlog_debug_verbose("%s: called with node pfx=%s", __func__, |
1778 | buf); | |
1779 | } | |
1780 | rfapiDebugBacktrace(); | |
65efcfce LB |
1781 | #endif |
1782 | ||
d62a17ae | 1783 | rfapiQprefix2Rprefix(&rn->p, &rprefix); |
1784 | ||
fe08ba7e | 1785 | rib_rn = rfd_rib_table ? agg_node_get(rfd_rib_table, &rn->p) : NULL; |
d62a17ae | 1786 | |
1787 | /* | |
1788 | * Add non-withdrawn routes at this node | |
1789 | */ | |
1790 | count = rfapiNhlAddNodeRoutes(rn, &rprefix, lifetime, 0, &answer, &last, | |
1791 | exclude_vnaddr, rib_rn, | |
1792 | pfx_target_original); | |
1793 | ||
1794 | /* | |
1795 | * If the list has at least one entry, it's finished | |
1796 | */ | |
1797 | if (count) { | |
1798 | count += rfapiNhlAddSubtree(rn, lifetime, &answer, &last, NULL, | |
1799 | exclude_vnaddr, rfd_rib_table, | |
1800 | pfx_target_original); | |
1801 | vnc_zlog_debug_verbose("%s: %d nexthops, answer=%p", __func__, | |
1802 | count, answer); | |
65efcfce | 1803 | #if DEBUG_RETURNED_NHL |
d62a17ae | 1804 | rfapiPrintNhl(NULL, answer); |
65efcfce | 1805 | #endif |
d62a17ae | 1806 | if (rib_rn) |
fe08ba7e | 1807 | agg_unlock_node(rib_rn); |
d62a17ae | 1808 | return answer; |
1809 | } | |
1810 | ||
1811 | /* | |
1812 | * Add withdrawn routes at this node | |
1813 | */ | |
1814 | count = rfapiNhlAddNodeRoutes(rn, &rprefix, lifetime, 1, &answer, &last, | |
1815 | exclude_vnaddr, rib_rn, | |
1816 | pfx_target_original); | |
1817 | if (rib_rn) | |
fe08ba7e | 1818 | agg_unlock_node(rib_rn); |
d62a17ae | 1819 | |
1820 | // rfapiPrintNhl(NULL, answer); | |
1821 | ||
1822 | /* | |
1823 | * walk up the tree until we find a node with non-deleted | |
1824 | * routes, then add them | |
1825 | */ | |
fe08ba7e DS |
1826 | for (parent = agg_node_parent(rn); parent; |
1827 | parent = agg_node_parent(parent)) { | |
d62a17ae | 1828 | if (rfapiHasNonRemovedRoutes(parent)) { |
1829 | break; | |
1830 | } | |
1831 | } | |
1832 | ||
1833 | /* | |
1834 | * Add non-withdrawn routes from less-specific prefix | |
1835 | */ | |
1836 | if (parent) { | |
fe08ba7e DS |
1837 | rib_rn = rfd_rib_table ? agg_node_get(rfd_rib_table, &parent->p) |
1838 | : NULL; | |
d62a17ae | 1839 | rfapiQprefix2Rprefix(&parent->p, &rprefix); |
1840 | count += rfapiNhlAddNodeRoutes(parent, &rprefix, lifetime, 0, | |
1841 | &answer, &last, exclude_vnaddr, | |
1842 | rib_rn, pfx_target_original); | |
1843 | count += rfapiNhlAddSubtree(parent, lifetime, &answer, &last, | |
1844 | rn, exclude_vnaddr, rfd_rib_table, | |
1845 | pfx_target_original); | |
1846 | if (rib_rn) | |
fe08ba7e | 1847 | agg_unlock_node(rib_rn); |
d62a17ae | 1848 | } else { |
1849 | /* | |
1850 | * There is no parent with non-removed routes. Still need to | |
1851 | * add subtree of original node if it contributed routes to the | |
1852 | * answer. | |
1853 | */ | |
1854 | if (count) | |
1855 | count += rfapiNhlAddSubtree(rn, lifetime, &answer, | |
1856 | &last, rn, exclude_vnaddr, | |
1857 | rfd_rib_table, | |
1858 | pfx_target_original); | |
1859 | } | |
1860 | ||
1861 | vnc_zlog_debug_verbose("%s: %d nexthops, answer=%p", __func__, count, | |
1862 | answer); | |
65efcfce | 1863 | #if DEBUG_RETURNED_NHL |
d62a17ae | 1864 | rfapiPrintNhl(NULL, answer); |
65efcfce | 1865 | #endif |
d62a17ae | 1866 | return answer; |
65efcfce LB |
1867 | } |
1868 | ||
1869 | /* | |
1870 | * Construct nexthop list of all routes in table | |
1871 | */ | |
d62a17ae | 1872 | struct rfapi_next_hop_entry *rfapiRouteTable2NextHopList( |
fe08ba7e DS |
1873 | struct agg_table *rt, uint32_t lifetime, /* put into nexthop entries */ |
1874 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
1875 | struct agg_table *rfd_rib_table, /* preload this NVE rib table */ | |
1876 | struct prefix *pfx_target_original) /* query target */ | |
65efcfce | 1877 | { |
fe08ba7e | 1878 | struct agg_node *rn; |
d62a17ae | 1879 | struct rfapi_next_hop_entry *biglist = NULL; |
1880 | struct rfapi_next_hop_entry *nhl; | |
1881 | struct rfapi_next_hop_entry *tail = NULL; | |
1882 | int count = 0; | |
1883 | ||
fe08ba7e | 1884 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
d62a17ae | 1885 | |
1886 | nhl = rfapiRouteNode2NextHopList(rn, lifetime, exclude_vnaddr, | |
1887 | rfd_rib_table, | |
1888 | pfx_target_original); | |
1889 | if (!tail) { | |
1890 | tail = biglist = nhl; | |
1891 | if (tail) | |
1892 | count = 1; | |
1893 | } else { | |
1894 | tail->next = nhl; | |
1895 | } | |
1896 | if (tail) { | |
1897 | while (tail->next) { | |
1898 | ++count; | |
1899 | tail = tail->next; | |
1900 | } | |
1901 | } | |
1902 | } | |
1903 | ||
1904 | vnc_zlog_debug_verbose("%s: returning %d routes", __func__, count); | |
1905 | return biglist; | |
65efcfce LB |
1906 | } |
1907 | ||
d62a17ae | 1908 | struct rfapi_next_hop_entry *rfapiEthRouteNode2NextHopList( |
fe08ba7e | 1909 | struct agg_node *rn, struct rfapi_ip_prefix *rprefix, |
d62a17ae | 1910 | uint32_t lifetime, /* put into nexthop entries */ |
1911 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
fe08ba7e | 1912 | struct agg_table *rfd_rib_table, /* preload NVE rib table */ |
d62a17ae | 1913 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1914 | { |
d62a17ae | 1915 | int count = 0; |
1916 | struct rfapi_next_hop_entry *answer = NULL; | |
1917 | struct rfapi_next_hop_entry *last = NULL; | |
fe08ba7e | 1918 | struct agg_node *rib_rn; |
65efcfce | 1919 | |
fe08ba7e | 1920 | rib_rn = rfd_rib_table ? agg_node_get(rfd_rib_table, &rn->p) : NULL; |
65efcfce | 1921 | |
d62a17ae | 1922 | count = rfapiNhlAddNodeRoutes(rn, rprefix, lifetime, 0, &answer, &last, |
1923 | NULL, rib_rn, pfx_target_original); | |
65efcfce LB |
1924 | |
1925 | #if DEBUG_ENCAP_MONITOR | |
d62a17ae | 1926 | vnc_zlog_debug_verbose("%s: node %p: %d non-holddown routes", __func__, |
1927 | rn, count); | |
65efcfce LB |
1928 | #endif |
1929 | ||
d62a17ae | 1930 | if (!count) { |
1931 | count = rfapiNhlAddNodeRoutes(rn, rprefix, lifetime, 1, &answer, | |
1932 | &last, exclude_vnaddr, rib_rn, | |
1933 | pfx_target_original); | |
1934 | vnc_zlog_debug_verbose("%s: node %p: %d holddown routes", | |
1935 | __func__, rn, count); | |
1936 | } | |
65efcfce | 1937 | |
d62a17ae | 1938 | if (rib_rn) |
fe08ba7e | 1939 | agg_unlock_node(rib_rn); |
65efcfce LB |
1940 | |
1941 | #if DEBUG_RETURNED_NHL | |
d62a17ae | 1942 | rfapiPrintNhl(NULL, answer); |
65efcfce LB |
1943 | #endif |
1944 | ||
d62a17ae | 1945 | return answer; |
65efcfce LB |
1946 | } |
1947 | ||
1948 | ||
1949 | /* | |
1950 | * Construct nexthop list of all routes in table | |
1951 | */ | |
d62a17ae | 1952 | struct rfapi_next_hop_entry *rfapiEthRouteTable2NextHopList( |
1953 | uint32_t logical_net_id, struct rfapi_ip_prefix *rprefix, | |
1954 | uint32_t lifetime, /* put into nexthop entries */ | |
1955 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
fe08ba7e | 1956 | struct agg_table *rfd_rib_table, /* preload NVE rib node */ |
d62a17ae | 1957 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1958 | { |
d62a17ae | 1959 | struct rfapi_import_table *it; |
1960 | struct bgp *bgp = bgp_get_default(); | |
fe08ba7e DS |
1961 | struct agg_table *rt; |
1962 | struct agg_node *rn; | |
d62a17ae | 1963 | struct rfapi_next_hop_entry *biglist = NULL; |
1964 | struct rfapi_next_hop_entry *nhl; | |
1965 | struct rfapi_next_hop_entry *tail = NULL; | |
1966 | int count = 0; | |
1967 | ||
1968 | ||
1969 | it = rfapiMacImportTableGet(bgp, logical_net_id); | |
1970 | rt = it->imported_vpn[AFI_L2VPN]; | |
1971 | ||
fe08ba7e | 1972 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
d62a17ae | 1973 | |
1974 | nhl = rfapiEthRouteNode2NextHopList( | |
1975 | rn, rprefix, lifetime, exclude_vnaddr, rfd_rib_table, | |
1976 | pfx_target_original); | |
1977 | if (!tail) { | |
1978 | tail = biglist = nhl; | |
1979 | if (tail) | |
1980 | count = 1; | |
1981 | } else { | |
1982 | tail->next = nhl; | |
1983 | } | |
1984 | if (tail) { | |
1985 | while (tail->next) { | |
1986 | ++count; | |
1987 | tail = tail->next; | |
1988 | } | |
1989 | } | |
1990 | } | |
1991 | ||
1992 | vnc_zlog_debug_verbose("%s: returning %d routes", __func__, count); | |
1993 | return biglist; | |
65efcfce LB |
1994 | } |
1995 | ||
1996 | /* | |
40381db7 DS |
1997 | * Insert a new bpi to the imported route table node, |
1998 | * keeping the list of BPIs sorted best route first | |
65efcfce | 1999 | */ |
fe08ba7e | 2000 | static void rfapiBgpInfoAttachSorted(struct agg_node *rn, |
4b7e6066 | 2001 | struct bgp_path_info *info_new, afi_t afi, |
d62a17ae | 2002 | safi_t safi) |
65efcfce | 2003 | { |
d62a17ae | 2004 | struct bgp *bgp; |
4b7e6066 DS |
2005 | struct bgp_path_info *prev; |
2006 | struct bgp_path_info *next; | |
d62a17ae | 2007 | char pfx_buf[PREFIX2STR_BUFFER]; |
2008 | ||
2009 | ||
2010 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
2011 | ||
2012 | if (VNC_DEBUG(IMPORT_BI_ATTACH)) { | |
2013 | vnc_zlog_debug_verbose("%s: info_new->peer=%p", __func__, | |
2014 | info_new->peer); | |
2015 | vnc_zlog_debug_verbose("%s: info_new->peer->su_remote=%p", | |
2016 | __func__, info_new->peer->su_remote); | |
2017 | } | |
2018 | ||
2019 | for (prev = NULL, next = rn->info; next; | |
2020 | prev = next, next = next->next) { | |
1defdda8 DS |
2021 | if (!bgp |
2022 | || (!CHECK_FLAG(info_new->flags, BGP_PATH_REMOVED) | |
2023 | && CHECK_FLAG(next->flags, BGP_PATH_REMOVED)) | |
18ee8310 DS |
2024 | || bgp_path_info_cmp_compatible(bgp, info_new, next, |
2025 | pfx_buf, afi, safi) | |
d62a17ae | 2026 | == -1) { /* -1 if 1st is better */ |
2027 | break; | |
2028 | } | |
2029 | } | |
2030 | vnc_zlog_debug_verbose("%s: prev=%p, next=%p", __func__, prev, next); | |
2031 | if (prev) { | |
2032 | prev->next = info_new; | |
2033 | } else { | |
2034 | rn->info = info_new; | |
2035 | } | |
2036 | info_new->prev = prev; | |
2037 | info_new->next = next; | |
2038 | if (next) | |
2039 | next->prev = info_new; | |
2040 | bgp_attr_intern(info_new->attr); | |
65efcfce LB |
2041 | } |
2042 | ||
40381db7 | 2043 | static void rfapiBgpInfoDetach(struct agg_node *rn, struct bgp_path_info *bpi) |
65efcfce | 2044 | { |
d62a17ae | 2045 | /* |
2046 | * Remove the route (doubly-linked) | |
2047 | */ | |
40381db7 DS |
2048 | // bgp_attr_unintern (&bpi->attr); |
2049 | if (bpi->next) | |
2050 | bpi->next->prev = bpi->prev; | |
2051 | if (bpi->prev) | |
2052 | bpi->prev->next = bpi->next; | |
d62a17ae | 2053 | else |
40381db7 | 2054 | rn->info = bpi->next; |
65efcfce LB |
2055 | } |
2056 | ||
2057 | /* | |
2058 | * For L3-indexed import tables | |
2059 | */ | |
d62a17ae | 2060 | static int rfapi_bi_peer_rd_cmp(void *b1, void *b2) |
65efcfce | 2061 | { |
40381db7 DS |
2062 | struct bgp_path_info *bpi1 = b1; |
2063 | struct bgp_path_info *bpi2 = b2; | |
d62a17ae | 2064 | |
2065 | /* | |
2066 | * Compare peers | |
2067 | */ | |
40381db7 | 2068 | if (bpi1->peer < bpi2->peer) |
d62a17ae | 2069 | return -1; |
40381db7 | 2070 | if (bpi1->peer > bpi2->peer) |
d62a17ae | 2071 | return 1; |
2072 | ||
2073 | /* | |
2074 | * compare RDs | |
2075 | */ | |
40381db7 DS |
2076 | return vnc_prefix_cmp((struct prefix *)&bpi1->extra->vnc.import.rd, |
2077 | (struct prefix *)&bpi2->extra->vnc.import.rd); | |
65efcfce LB |
2078 | } |
2079 | ||
2080 | /* | |
2081 | * For L2-indexed import tables | |
40381db7 | 2082 | * The BPIs in these tables should ALWAYS have an aux_prefix set because |
65efcfce LB |
2083 | * they arrive via IPv4 or IPv6 advertisements. |
2084 | */ | |
d62a17ae | 2085 | static int rfapi_bi_peer_rd_aux_cmp(void *b1, void *b2) |
65efcfce | 2086 | { |
40381db7 DS |
2087 | struct bgp_path_info *bpi1 = b1; |
2088 | struct bgp_path_info *bpi2 = b2; | |
d62a17ae | 2089 | int rc; |
2090 | ||
2091 | /* | |
2092 | * Compare peers | |
2093 | */ | |
40381db7 | 2094 | if (bpi1->peer < bpi2->peer) |
d62a17ae | 2095 | return -1; |
40381db7 | 2096 | if (bpi1->peer > bpi2->peer) |
d62a17ae | 2097 | return 1; |
2098 | ||
2099 | /* | |
2100 | * compare RDs | |
2101 | */ | |
40381db7 DS |
2102 | rc = vnc_prefix_cmp((struct prefix *)&bpi1->extra->vnc.import.rd, |
2103 | (struct prefix *)&bpi2->extra->vnc.import.rd); | |
d62a17ae | 2104 | if (rc) { |
2105 | return rc; | |
2106 | } | |
2107 | ||
2108 | /* | |
2109 | * L2 import tables can have multiple entries with the | |
2110 | * same MAC address, same RD, but different L3 addresses. | |
2111 | * | |
2112 | * Use presence of aux_prefix with AF=ethernet and prefixlen=1 | |
2113 | * as magic value to signify explicit wildcarding of the aux_prefix. | |
40381db7 DS |
2114 | * This magic value will not appear in bona fide bpi entries in |
2115 | * the import table, but is allowed in the "fake" bpi used to | |
d62a17ae | 2116 | * probe the table when searching. (We have to test both b1 and b2 |
2117 | * because there is no guarantee of the order the test key and | |
2118 | * the real key will be passed) | |
2119 | */ | |
40381db7 DS |
2120 | if ((bpi1->extra->vnc.import.aux_prefix.family == AF_ETHERNET |
2121 | && (bpi1->extra->vnc.import.aux_prefix.prefixlen == 1)) | |
2122 | || (bpi2->extra->vnc.import.aux_prefix.family == AF_ETHERNET | |
2123 | && (bpi2->extra->vnc.import.aux_prefix.prefixlen == 1))) { | |
d62a17ae | 2124 | |
2125 | /* | |
2126 | * wildcard aux address specified | |
2127 | */ | |
2128 | return 0; | |
2129 | } | |
2130 | ||
40381db7 DS |
2131 | return vnc_prefix_cmp(&bpi1->extra->vnc.import.aux_prefix, |
2132 | &bpi2->extra->vnc.import.aux_prefix); | |
65efcfce LB |
2133 | } |
2134 | ||
2135 | ||
2136 | /* | |
2137 | * Index on RD and Peer | |
2138 | */ | |
fe08ba7e | 2139 | static void rfapiItBiIndexAdd(struct agg_node *rn, /* Import table VPN node */ |
40381db7 | 2140 | struct bgp_path_info *bpi) /* new BPI */ |
65efcfce | 2141 | { |
d62a17ae | 2142 | struct skiplist *sl; |
2143 | ||
2144 | assert(rn); | |
40381db7 DS |
2145 | assert(bpi); |
2146 | assert(bpi->extra); | |
d62a17ae | 2147 | |
2148 | { | |
06b9f471 DS |
2149 | char buf[RD_ADDRSTRLEN]; |
2150 | ||
40381db7 DS |
2151 | vnc_zlog_debug_verbose("%s: bpi %p, peer %p, rd %s", __func__, |
2152 | bpi, bpi->peer, | |
2153 | prefix_rd2str(&bpi->extra->vnc.import.rd, | |
06b9f471 | 2154 | buf, sizeof(buf))); |
d62a17ae | 2155 | } |
2156 | ||
2157 | sl = RFAPI_RDINDEX_W_ALLOC(rn); | |
2158 | if (!sl) { | |
2159 | if (AF_ETHERNET == rn->p.family) { | |
2160 | sl = skiplist_new(0, rfapi_bi_peer_rd_aux_cmp, NULL); | |
2161 | } else { | |
2162 | sl = skiplist_new(0, rfapi_bi_peer_rd_cmp, NULL); | |
2163 | } | |
2164 | RFAPI_IT_EXTRA_GET(rn)->u.vpn.idx_rd = sl; | |
fe08ba7e | 2165 | agg_lock_node(rn); /* for skiplist */ |
d62a17ae | 2166 | } |
40381db7 | 2167 | assert(!skiplist_insert(sl, (void *)bpi, (void *)bpi)); |
fe08ba7e | 2168 | agg_lock_node(rn); /* for skiplist entry */ |
d62a17ae | 2169 | |
40381db7 | 2170 | /* NB: BPIs in import tables are not refcounted */ |
65efcfce LB |
2171 | } |
2172 | ||
fe08ba7e | 2173 | static void rfapiItBiIndexDump(struct agg_node *rn) |
65efcfce | 2174 | { |
d62a17ae | 2175 | struct skiplist *sl; |
2176 | void *cursor = NULL; | |
4b7e6066 DS |
2177 | struct bgp_path_info *k; |
2178 | struct bgp_path_info *v; | |
d62a17ae | 2179 | int rc; |
2180 | ||
2181 | sl = RFAPI_RDINDEX(rn); | |
2182 | if (!sl) | |
2183 | return; | |
2184 | ||
2185 | for (rc = skiplist_next(sl, (void **)&k, (void **)&v, &cursor); !rc; | |
2186 | rc = skiplist_next(sl, (void **)&k, (void **)&v, &cursor)) { | |
2187 | ||
06b9f471 | 2188 | char buf[RD_ADDRSTRLEN]; |
872ed4c7 | 2189 | char buf_aux_pfx[PREFIX_STRLEN]; |
d62a17ae | 2190 | |
06b9f471 | 2191 | prefix_rd2str(&k->extra->vnc.import.rd, buf, sizeof(buf)); |
d62a17ae | 2192 | if (k->extra->vnc.import.aux_prefix.family) { |
2193 | prefix2str(&k->extra->vnc.import.aux_prefix, | |
06b9f471 DS |
2194 | buf_aux_pfx, sizeof(buf_aux_pfx)); |
2195 | } else | |
872ed4c7 | 2196 | strncpy(buf_aux_pfx, "(none)", PREFIX_STRLEN); |
d62a17ae | 2197 | |
40381db7 | 2198 | vnc_zlog_debug_verbose("bpi %p, peer %p, rd %s, aux_prefix %s", |
d62a17ae | 2199 | k, k->peer, buf, buf_aux_pfx); |
2200 | } | |
65efcfce LB |
2201 | } |
2202 | ||
4b7e6066 | 2203 | static struct bgp_path_info *rfapiItBiIndexSearch( |
fe08ba7e | 2204 | struct agg_node *rn, /* Import table VPN node */ |
d62a17ae | 2205 | struct prefix_rd *prd, struct peer *peer, |
2206 | struct prefix *aux_prefix) /* optional L3 addr for L2 ITs */ | |
65efcfce | 2207 | { |
d62a17ae | 2208 | struct skiplist *sl; |
2209 | int rc; | |
40381db7 DS |
2210 | struct bgp_path_info bpi_fake; |
2211 | struct bgp_path_info_extra bpi_extra; | |
2212 | struct bgp_path_info *bpi_result; | |
65efcfce | 2213 | |
d62a17ae | 2214 | sl = RFAPI_RDINDEX(rn); |
2215 | if (!sl) | |
2216 | return NULL; | |
65efcfce LB |
2217 | |
2218 | #if DEBUG_BI_SEARCH | |
d62a17ae | 2219 | { |
06b9f471 | 2220 | char buf[RD_ADDRSTRLEN]; |
872ed4c7 | 2221 | char buf_aux_pfx[PREFIX_STRLEN]; |
d62a17ae | 2222 | |
d62a17ae | 2223 | if (aux_prefix) { |
872ed4c7 DS |
2224 | prefix2str(aux_prefix, buf_aux_pfx, |
2225 | sizeof(buf_aux_pfx)); | |
06b9f471 DS |
2226 | } else |
2227 | strncpy(buf_aux_pfx, "(nil)", sizeof(buf_aux_pfx)); | |
d62a17ae | 2228 | |
2229 | vnc_zlog_debug_verbose("%s want prd=%s, peer=%p, aux_prefix=%s", | |
06b9f471 DS |
2230 | __func__, |
2231 | prefix_rd2str(prd, buf, sizeof(buf)), | |
2232 | peer, buf_aux_pfx); | |
d62a17ae | 2233 | rfapiItBiIndexDump(rn); |
2234 | } | |
65efcfce LB |
2235 | #endif |
2236 | ||
d62a17ae | 2237 | /* threshold is a WAG */ |
2238 | if (sl->count < 3) { | |
65efcfce | 2239 | #if DEBUG_BI_SEARCH |
d62a17ae | 2240 | vnc_zlog_debug_verbose("%s: short list algorithm", __func__); |
65efcfce | 2241 | #endif |
d62a17ae | 2242 | /* if short list, linear search might be faster */ |
40381db7 DS |
2243 | for (bpi_result = rn->info; bpi_result; |
2244 | bpi_result = bpi_result->next) { | |
65efcfce | 2245 | #if DEBUG_BI_SEARCH |
d62a17ae | 2246 | { |
06b9f471 DS |
2247 | char buf[RD_ADDRSTRLEN]; |
2248 | ||
d62a17ae | 2249 | vnc_zlog_debug_verbose( |
40381db7 DS |
2250 | "%s: bpi has prd=%s, peer=%p", __func__, |
2251 | prefix_rd2str(&bpi_result->extra->vnc | |
996c9314 LB |
2252 | .import.rd, |
2253 | buf, sizeof(buf)), | |
40381db7 | 2254 | bpi_result->peer); |
d62a17ae | 2255 | } |
65efcfce | 2256 | #endif |
40381db7 DS |
2257 | if (peer == bpi_result->peer |
2258 | && !prefix_cmp((struct prefix *)&bpi_result->extra | |
d62a17ae | 2259 | ->vnc.import.rd, |
2260 | (struct prefix *)prd)) { | |
65efcfce LB |
2261 | |
2262 | #if DEBUG_BI_SEARCH | |
d62a17ae | 2263 | vnc_zlog_debug_verbose( |
2264 | "%s: peer and RD same, doing aux_prefix check", | |
2265 | __func__); | |
65efcfce | 2266 | #endif |
d62a17ae | 2267 | if (!aux_prefix |
40381db7 DS |
2268 | || !prefix_cmp( |
2269 | aux_prefix, | |
2270 | &bpi_result->extra->vnc.import | |
2271 | .aux_prefix)) { | |
65efcfce LB |
2272 | |
2273 | #if DEBUG_BI_SEARCH | |
d62a17ae | 2274 | vnc_zlog_debug_verbose("%s: match", |
2275 | __func__); | |
65efcfce | 2276 | #endif |
d62a17ae | 2277 | break; |
2278 | } | |
2279 | } | |
2280 | } | |
40381db7 | 2281 | return bpi_result; |
d62a17ae | 2282 | } |
2283 | ||
40381db7 DS |
2284 | bpi_fake.peer = peer; |
2285 | bpi_fake.extra = &bpi_extra; | |
2286 | bpi_fake.extra->vnc.import.rd = *(struct prefix_rd *)prd; | |
d62a17ae | 2287 | if (aux_prefix) { |
40381db7 | 2288 | bpi_fake.extra->vnc.import.aux_prefix = *aux_prefix; |
d62a17ae | 2289 | } else { |
2290 | /* wildcard */ | |
40381db7 DS |
2291 | bpi_fake.extra->vnc.import.aux_prefix.family = AF_ETHERNET; |
2292 | bpi_fake.extra->vnc.import.aux_prefix.prefixlen = 1; | |
d62a17ae | 2293 | } |
2294 | ||
40381db7 | 2295 | rc = skiplist_search(sl, (void *)&bpi_fake, (void *)&bpi_result); |
d62a17ae | 2296 | |
2297 | if (rc) { | |
65efcfce | 2298 | #if DEBUG_BI_SEARCH |
d62a17ae | 2299 | vnc_zlog_debug_verbose("%s: no match", __func__); |
65efcfce | 2300 | #endif |
d62a17ae | 2301 | return NULL; |
2302 | } | |
65efcfce LB |
2303 | |
2304 | #if DEBUG_BI_SEARCH | |
40381db7 | 2305 | vnc_zlog_debug_verbose("%s: matched bpi=%p", __func__, bpi_result); |
65efcfce LB |
2306 | #endif |
2307 | ||
40381db7 | 2308 | return bpi_result; |
65efcfce LB |
2309 | } |
2310 | ||
fe08ba7e | 2311 | static void rfapiItBiIndexDel(struct agg_node *rn, /* Import table VPN node */ |
40381db7 | 2312 | struct bgp_path_info *bpi) /* old BPI */ |
65efcfce | 2313 | { |
d62a17ae | 2314 | struct skiplist *sl; |
2315 | int rc; | |
65efcfce | 2316 | |
d62a17ae | 2317 | { |
06b9f471 DS |
2318 | char buf[RD_ADDRSTRLEN]; |
2319 | ||
40381db7 DS |
2320 | vnc_zlog_debug_verbose("%s: bpi %p, peer %p, rd %s", __func__, |
2321 | bpi, bpi->peer, | |
2322 | prefix_rd2str(&bpi->extra->vnc.import.rd, | |
06b9f471 | 2323 | buf, sizeof(buf))); |
d62a17ae | 2324 | } |
65efcfce | 2325 | |
d62a17ae | 2326 | sl = RFAPI_RDINDEX(rn); |
2327 | assert(sl); | |
65efcfce | 2328 | |
40381db7 | 2329 | rc = skiplist_delete(sl, (void *)(bpi), (void *)bpi); |
d62a17ae | 2330 | if (rc) { |
2331 | rfapiItBiIndexDump(rn); | |
2332 | } | |
2333 | assert(!rc); | |
65efcfce | 2334 | |
fe08ba7e | 2335 | agg_unlock_node(rn); /* for skiplist entry */ |
65efcfce | 2336 | |
40381db7 | 2337 | /* NB: BPIs in import tables are not refcounted */ |
65efcfce LB |
2338 | } |
2339 | ||
2340 | /* | |
2341 | * Add a backreference at the ENCAP node to the VPN route that | |
2342 | * refers to it | |
2343 | */ | |
4b7e6066 DS |
2344 | static void |
2345 | rfapiMonitorEncapAdd(struct rfapi_import_table *import_table, | |
40381db7 DS |
2346 | struct prefix *p, /* VN address */ |
2347 | struct agg_node *vpn_rn, /* VPN node */ | |
2348 | struct bgp_path_info *vpn_bpi) /* VPN bpi/route */ | |
65efcfce | 2349 | { |
d62a17ae | 2350 | afi_t afi = family2afi(p->family); |
fe08ba7e | 2351 | struct agg_node *rn; |
d62a17ae | 2352 | struct rfapi_monitor_encap *m; |
2353 | ||
2354 | assert(afi); | |
fe08ba7e | 2355 | rn = agg_node_get(import_table->imported_encap[afi], p); /* locks rn */ |
d62a17ae | 2356 | assert(rn); |
2357 | ||
2358 | m = XCALLOC(MTYPE_RFAPI_MONITOR_ENCAP, | |
2359 | sizeof(struct rfapi_monitor_encap)); | |
2360 | assert(m); | |
2361 | ||
2362 | m->node = vpn_rn; | |
40381db7 | 2363 | m->bpi = vpn_bpi; |
d62a17ae | 2364 | m->rn = rn; |
2365 | ||
2366 | /* insert to encap node's list */ | |
2367 | m->next = RFAPI_MONITOR_ENCAP(rn); | |
2368 | if (m->next) | |
2369 | m->next->prev = m; | |
2370 | RFAPI_MONITOR_ENCAP_W_ALLOC(rn) = m; | |
2371 | ||
2372 | /* for easy lookup when deleting vpn route */ | |
40381db7 | 2373 | vpn_bpi->extra->vnc.import.hme = m; |
d62a17ae | 2374 | |
2375 | vnc_zlog_debug_verbose( | |
40381db7 DS |
2376 | "%s: it=%p, vpn_bpi=%p, afi=%d, encap rn=%p, setting vpn_bpi->extra->vnc.import.hme=%p", |
2377 | __func__, import_table, vpn_bpi, afi, rn, m); | |
d62a17ae | 2378 | |
2379 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, 0); | |
40381db7 | 2380 | bgp_attr_intern(vpn_bpi->attr); |
65efcfce LB |
2381 | } |
2382 | ||
40381db7 | 2383 | static void rfapiMonitorEncapDelete(struct bgp_path_info *vpn_bpi) |
65efcfce | 2384 | { |
d62a17ae | 2385 | /* |
2386 | * Remove encap monitor | |
2387 | */ | |
40381db7 DS |
2388 | vnc_zlog_debug_verbose("%s: vpn_bpi=%p", __func__, vpn_bpi); |
2389 | if (vpn_bpi->extra) { | |
2390 | struct rfapi_monitor_encap *hme = | |
2391 | vpn_bpi->extra->vnc.import.hme; | |
d62a17ae | 2392 | |
2393 | if (hme) { | |
2394 | ||
2395 | vnc_zlog_debug_verbose("%s: hme=%p", __func__, hme); | |
2396 | ||
2397 | /* Refcount checking takes too long here */ | |
2398 | // RFAPI_CHECK_REFCOUNT(hme->rn, SAFI_ENCAP, 0); | |
2399 | if (hme->next) | |
2400 | hme->next->prev = hme->prev; | |
2401 | if (hme->prev) | |
2402 | hme->prev->next = hme->next; | |
2403 | else | |
2404 | RFAPI_MONITOR_ENCAP_W_ALLOC(hme->rn) = | |
2405 | hme->next; | |
2406 | /* Refcount checking takes too long here */ | |
2407 | // RFAPI_CHECK_REFCOUNT(hme->rn, SAFI_ENCAP, 1); | |
2408 | ||
2409 | /* see if the struct rfapi_it_extra is empty and can be | |
2410 | * freed */ | |
2411 | rfapiMonitorExtraPrune(SAFI_ENCAP, hme->rn); | |
2412 | ||
fe08ba7e | 2413 | agg_unlock_node(hme->rn); /* decr ref count */ |
d62a17ae | 2414 | XFREE(MTYPE_RFAPI_MONITOR_ENCAP, hme); |
40381db7 | 2415 | vpn_bpi->extra->vnc.import.hme = NULL; |
d62a17ae | 2416 | } |
2417 | } | |
65efcfce LB |
2418 | } |
2419 | ||
2420 | /* | |
2421 | * quagga lib/thread.h says this must return int even though | |
2422 | * it doesn't do anything with the return value | |
2423 | */ | |
d62a17ae | 2424 | static int rfapiWithdrawTimerVPN(struct thread *t) |
65efcfce | 2425 | { |
d62a17ae | 2426 | struct rfapi_withdraw *wcb = t->arg; |
40381db7 | 2427 | struct bgp_path_info *bpi = wcb->info; |
d62a17ae | 2428 | struct bgp *bgp = bgp_get_default(); |
2429 | ||
2430 | struct rfapi_monitor_vpn *moved; | |
2431 | afi_t afi; | |
2432 | ||
2433 | assert(wcb->node); | |
40381db7 | 2434 | assert(bpi); |
d62a17ae | 2435 | assert(wcb->import_table); |
40381db7 | 2436 | assert(bpi->extra); |
d62a17ae | 2437 | |
2438 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_MPLS_VPN, wcb->lockoffset); | |
2439 | ||
2440 | { | |
2441 | char buf[BUFSIZ]; | |
2442 | ||
2443 | vnc_zlog_debug_verbose( | |
40381db7 | 2444 | "%s: removing bpi %p at prefix %s/%d", __func__, bpi, |
d62a17ae | 2445 | rfapi_ntop(wcb->node->p.family, &wcb->node->p.u.prefix, |
2446 | buf, BUFSIZ), | |
2447 | wcb->node->p.prefixlen); | |
2448 | } | |
2449 | ||
2450 | /* | |
2451 | * Remove the route (doubly-linked) | |
2452 | */ | |
40381db7 DS |
2453 | if (CHECK_FLAG(bpi->flags, BGP_PATH_VALID) |
2454 | && VALID_INTERIOR_TYPE(bpi->type)) | |
d62a17ae | 2455 | RFAPI_MONITOR_EXTERIOR(wcb->node)->valid_interior_count--; |
2456 | ||
2457 | afi = family2afi(wcb->node->p.family); | |
2458 | wcb->import_table->holddown_count[afi] -= 1; /* keep count consistent */ | |
40381db7 DS |
2459 | rfapiItBiIndexDel(wcb->node, bpi); |
2460 | rfapiBgpInfoDetach(wcb->node, bpi); /* with removed bpi */ | |
d62a17ae | 2461 | |
2462 | vnc_import_bgp_exterior_del_route_interior(bgp, wcb->import_table, | |
40381db7 | 2463 | wcb->node, bpi); |
d62a17ae | 2464 | |
2465 | ||
2466 | /* | |
2467 | * If VNC is configured to send response remove messages, AND | |
2468 | * if the removed route had a UN address, do response removal | |
2469 | * processing. | |
2470 | */ | |
2471 | if (!(bgp->rfapi_cfg->flags | |
2472 | & BGP_VNC_CONFIG_RESPONSE_REMOVAL_DISABLE)) { | |
2473 | ||
2474 | int has_valid_duplicate = 0; | |
40381db7 | 2475 | struct bgp_path_info *bpii; |
d62a17ae | 2476 | |
2477 | /* | |
2478 | * First check if there are any OTHER routes at this node | |
2479 | * that have the same nexthop and a valid UN address. If | |
2480 | * there are (e.g., from other peers), then the route isn't | |
2481 | * really gone, so skip sending a response removal message. | |
2482 | */ | |
40381db7 DS |
2483 | for (bpii = wcb->node->info; bpii; bpii = bpii->next) { |
2484 | if (rfapiVpnBiSamePtUn(bpi, bpii)) { | |
d62a17ae | 2485 | has_valid_duplicate = 1; |
2486 | break; | |
2487 | } | |
2488 | } | |
2489 | ||
2490 | vnc_zlog_debug_verbose("%s: has_valid_duplicate=%d", __func__, | |
2491 | has_valid_duplicate); | |
2492 | ||
2493 | if (!has_valid_duplicate) { | |
2494 | rfapiRibPendingDeleteRoute(bgp, wcb->import_table, afi, | |
2495 | wcb->node); | |
2496 | } | |
2497 | } | |
2498 | ||
40381db7 | 2499 | rfapiMonitorEncapDelete(bpi); |
d62a17ae | 2500 | |
2501 | /* | |
2502 | * If there are no VPN monitors at this VPN Node A, | |
2503 | * we are done | |
2504 | */ | |
2505 | if (!RFAPI_MONITOR_VPN(wcb->node)) { | |
2506 | vnc_zlog_debug_verbose("%s: no VPN monitors at this node", | |
2507 | __func__); | |
2508 | goto done; | |
2509 | } | |
2510 | ||
2511 | /* | |
2512 | * rfapiMonitorMoveShorter only moves monitors if there are | |
2513 | * no remaining valid routes at the current node | |
2514 | */ | |
2515 | moved = rfapiMonitorMoveShorter(wcb->node, 1); | |
2516 | ||
2517 | if (moved) { | |
2518 | rfapiMonitorMovedUp(wcb->import_table, wcb->node, moved->node, | |
2519 | moved); | |
2520 | } | |
65efcfce LB |
2521 | |
2522 | done: | |
d62a17ae | 2523 | /* |
40381db7 | 2524 | * Free VPN bpi |
d62a17ae | 2525 | */ |
40381db7 | 2526 | rfapiBgpInfoFree(bpi); |
d62a17ae | 2527 | wcb->info = NULL; |
2528 | ||
2529 | /* | |
2530 | * If route count at this node has gone to 0, withdraw exported prefix | |
2531 | */ | |
2532 | if (!wcb->node->info) { | |
2533 | /* see if the struct rfapi_it_extra is empty and can be freed */ | |
2534 | rfapiMonitorExtraPrune(SAFI_MPLS_VPN, wcb->node); | |
2535 | vnc_direct_bgp_del_prefix(bgp, wcb->import_table, wcb->node); | |
2536 | vnc_zebra_del_prefix(bgp, wcb->import_table, wcb->node); | |
2537 | } else { | |
2538 | /* | |
2539 | * nexthop change event | |
2540 | * vnc_direct_bgp_add_prefix() will recompute the VN addr | |
2541 | * ecommunity | |
2542 | */ | |
2543 | vnc_direct_bgp_add_prefix(bgp, wcb->import_table, wcb->node); | |
2544 | } | |
2545 | ||
2546 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_MPLS_VPN, 1 + wcb->lockoffset); | |
fe08ba7e | 2547 | agg_unlock_node(wcb->node); /* decr ref count */ |
d62a17ae | 2548 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); |
2549 | return 0; | |
65efcfce LB |
2550 | } |
2551 | ||
2552 | /* | |
2553 | * This works for multiprotocol extension, but not for plain ol' | |
2554 | * unicast IPv4 because that nexthop is stored in attr->nexthop | |
2555 | */ | |
d62a17ae | 2556 | void rfapiNexthop2Prefix(struct attr *attr, struct prefix *p) |
65efcfce | 2557 | { |
d62a17ae | 2558 | assert(p); |
2559 | assert(attr); | |
2560 | ||
2561 | memset(p, 0, sizeof(struct prefix)); | |
2562 | ||
2563 | switch (p->family = BGP_MP_NEXTHOP_FAMILY(attr->mp_nexthop_len)) { | |
2564 | case AF_INET: | |
2565 | p->u.prefix4 = attr->mp_nexthop_global_in; | |
2566 | p->prefixlen = 32; | |
2567 | break; | |
2568 | ||
2569 | case AF_INET6: | |
2570 | p->u.prefix6 = attr->mp_nexthop_global; | |
2571 | p->prefixlen = 128; | |
2572 | break; | |
2573 | ||
2574 | default: | |
2575 | vnc_zlog_debug_verbose("%s: Family is unknown = %d", __func__, | |
2576 | p->family); | |
2577 | } | |
65efcfce LB |
2578 | } |
2579 | ||
d62a17ae | 2580 | void rfapiUnicastNexthop2Prefix(afi_t afi, struct attr *attr, struct prefix *p) |
65efcfce | 2581 | { |
d62a17ae | 2582 | if (afi == AFI_IP) { |
2583 | p->family = AF_INET; | |
2584 | p->prefixlen = 32; | |
2585 | p->u.prefix4 = attr->nexthop; | |
2586 | } else { | |
2587 | rfapiNexthop2Prefix(attr, p); | |
2588 | } | |
65efcfce LB |
2589 | } |
2590 | ||
d62a17ae | 2591 | static int rfapiAttrNexthopAddrDifferent(struct prefix *p1, struct prefix *p2) |
65efcfce | 2592 | { |
d62a17ae | 2593 | if (!p1 || !p2) { |
2594 | vnc_zlog_debug_verbose("%s: p1 or p2 is NULL", __func__); | |
2595 | return 1; | |
2596 | } | |
2597 | ||
2598 | /* | |
2599 | * Are address families the same? | |
2600 | */ | |
2601 | if (p1->family != p2->family) { | |
2602 | return 1; | |
2603 | } | |
2604 | ||
2605 | switch (p1->family) { | |
2606 | case AF_INET: | |
2607 | if (IPV4_ADDR_SAME(&p1->u.prefix4, &p2->u.prefix4)) | |
2608 | return 0; | |
2609 | break; | |
2610 | ||
2611 | case AF_INET6: | |
2612 | if (IPV6_ADDR_SAME(&p1->u.prefix6, &p2->u.prefix6)) | |
2613 | return 0; | |
2614 | break; | |
2615 | ||
2616 | default: | |
2617 | assert(1); | |
2618 | } | |
2619 | ||
2620 | return 1; | |
65efcfce LB |
2621 | } |
2622 | ||
40381db7 DS |
2623 | static void rfapiCopyUnEncap2VPN(struct bgp_path_info *encap_bpi, |
2624 | struct bgp_path_info *vpn_bpi) | |
65efcfce | 2625 | { |
40381db7 DS |
2626 | if (!encap_bpi->attr) { |
2627 | zlog_warn("%s: no encap bpi attr/extra, can't copy UN address", | |
d62a17ae | 2628 | __func__); |
2629 | return; | |
2630 | } | |
2631 | ||
40381db7 DS |
2632 | if (!vpn_bpi || !vpn_bpi->extra) { |
2633 | zlog_warn("%s: no vpn bpi attr/extra, can't copy UN address", | |
d62a17ae | 2634 | __func__); |
2635 | return; | |
2636 | } | |
2637 | ||
40381db7 | 2638 | switch (BGP_MP_NEXTHOP_FAMILY(encap_bpi->attr->mp_nexthop_len)) { |
d62a17ae | 2639 | case AF_INET: |
2640 | ||
2641 | /* | |
2642 | * instrumentation to debug segfault of 091127 | |
2643 | */ | |
40381db7 DS |
2644 | vnc_zlog_debug_verbose("%s: vpn_bpi=%p", __func__, vpn_bpi); |
2645 | if (vpn_bpi) { | |
2646 | vnc_zlog_debug_verbose("%s: vpn_bpi->extra=%p", | |
2647 | __func__, vpn_bpi->extra); | |
d62a17ae | 2648 | } |
2649 | ||
40381db7 DS |
2650 | vpn_bpi->extra->vnc.import.un_family = AF_INET; |
2651 | vpn_bpi->extra->vnc.import.un.addr4 = | |
2652 | encap_bpi->attr->mp_nexthop_global_in; | |
d62a17ae | 2653 | break; |
2654 | ||
2655 | case AF_INET6: | |
40381db7 DS |
2656 | vpn_bpi->extra->vnc.import.un_family = AF_INET6; |
2657 | vpn_bpi->extra->vnc.import.un.addr6 = | |
2658 | encap_bpi->attr->mp_nexthop_global; | |
d62a17ae | 2659 | break; |
2660 | ||
2661 | default: | |
2662 | zlog_warn("%s: invalid encap nexthop length: %d", __func__, | |
40381db7 DS |
2663 | encap_bpi->attr->mp_nexthop_len); |
2664 | vpn_bpi->extra->vnc.import.un_family = 0; | |
d62a17ae | 2665 | break; |
2666 | } | |
65efcfce LB |
2667 | } |
2668 | ||
2669 | /* | |
2670 | * returns 0 on success, nonzero on error | |
2671 | */ | |
40381db7 DS |
2672 | static int |
2673 | rfapiWithdrawEncapUpdateCachedUn(struct rfapi_import_table *import_table, | |
2674 | struct bgp_path_info *encap_bpi, | |
2675 | struct agg_node *vpn_rn, | |
2676 | struct bgp_path_info *vpn_bpi) | |
65efcfce | 2677 | { |
40381db7 | 2678 | if (!encap_bpi) { |
d62a17ae | 2679 | |
2680 | /* | |
2681 | * clear cached UN address | |
2682 | */ | |
40381db7 | 2683 | if (!vpn_bpi || !vpn_bpi->extra) { |
d62a17ae | 2684 | zlog_warn( |
40381db7 | 2685 | "%s: missing VPN bpi/extra, can't clear UN addr", |
d62a17ae | 2686 | __func__); |
2687 | return 1; | |
2688 | } | |
40381db7 DS |
2689 | vpn_bpi->extra->vnc.import.un_family = 0; |
2690 | memset(&vpn_bpi->extra->vnc.import.un, 0, | |
2691 | sizeof(vpn_bpi->extra->vnc.import.un)); | |
2692 | if (CHECK_FLAG(vpn_bpi->flags, BGP_PATH_VALID)) { | |
2693 | if (rfapiGetVncTunnelUnAddr(vpn_bpi->attr, NULL)) { | |
2694 | UNSET_FLAG(vpn_bpi->flags, BGP_PATH_VALID); | |
2695 | if (VALID_INTERIOR_TYPE(vpn_bpi->type)) | |
d62a17ae | 2696 | RFAPI_MONITOR_EXTERIOR(vpn_rn) |
2697 | ->valid_interior_count--; | |
2698 | /* signal interior route withdrawal to | |
2699 | * import-exterior */ | |
2700 | vnc_import_bgp_exterior_del_route_interior( | |
2701 | bgp_get_default(), import_table, vpn_rn, | |
40381db7 | 2702 | vpn_bpi); |
d62a17ae | 2703 | } |
2704 | } | |
2705 | ||
2706 | } else { | |
40381db7 DS |
2707 | if (!vpn_bpi) { |
2708 | zlog_warn("%s: missing VPN bpi, can't clear UN addr", | |
d62a17ae | 2709 | __func__); |
2710 | return 1; | |
2711 | } | |
40381db7 DS |
2712 | rfapiCopyUnEncap2VPN(encap_bpi, vpn_bpi); |
2713 | if (!CHECK_FLAG(vpn_bpi->flags, BGP_PATH_VALID)) { | |
2714 | SET_FLAG(vpn_bpi->flags, BGP_PATH_VALID); | |
2715 | if (VALID_INTERIOR_TYPE(vpn_bpi->type)) | |
d62a17ae | 2716 | RFAPI_MONITOR_EXTERIOR(vpn_rn) |
2717 | ->valid_interior_count++; | |
2718 | /* signal interior route withdrawal to import-exterior | |
2719 | */ | |
2720 | vnc_import_bgp_exterior_add_route_interior( | |
2721 | bgp_get_default(), import_table, vpn_rn, | |
40381db7 | 2722 | vpn_bpi); |
d62a17ae | 2723 | } |
2724 | } | |
2725 | return 0; | |
65efcfce LB |
2726 | } |
2727 | ||
d62a17ae | 2728 | static int rfapiWithdrawTimerEncap(struct thread *t) |
65efcfce | 2729 | { |
d62a17ae | 2730 | struct rfapi_withdraw *wcb = t->arg; |
40381db7 | 2731 | struct bgp_path_info *bpi = wcb->info; |
d62a17ae | 2732 | int was_first_route = 0; |
2733 | struct rfapi_monitor_encap *em; | |
2734 | struct skiplist *vpn_node_sl = skiplist_new(0, NULL, NULL); | |
2735 | ||
2736 | assert(wcb->node); | |
40381db7 | 2737 | assert(bpi); |
d62a17ae | 2738 | assert(wcb->import_table); |
2739 | ||
2740 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_ENCAP, 0); | |
2741 | ||
40381db7 | 2742 | if (wcb->node->info == bpi) |
d62a17ae | 2743 | was_first_route = 1; |
2744 | ||
2745 | /* | |
40381db7 | 2746 | * Remove the route/bpi and free it |
d62a17ae | 2747 | */ |
40381db7 DS |
2748 | rfapiBgpInfoDetach(wcb->node, bpi); |
2749 | rfapiBgpInfoFree(bpi); | |
d62a17ae | 2750 | |
2751 | if (!was_first_route) | |
2752 | goto done; | |
2753 | ||
2754 | for (em = RFAPI_MONITOR_ENCAP(wcb->node); em; em = em->next) { | |
2755 | ||
2756 | /* | |
40381db7 DS |
2757 | * Update monitoring VPN BPIs with new encap info at the |
2758 | * head of the encap bpi chain (which could be NULL after | |
2759 | * removing the expiring bpi above) | |
d62a17ae | 2760 | */ |
2761 | if (rfapiWithdrawEncapUpdateCachedUn(wcb->import_table, | |
2762 | wcb->node->info, em->node, | |
40381db7 | 2763 | em->bpi)) |
d62a17ae | 2764 | continue; |
2765 | ||
2766 | /* | |
2767 | * Build a list of unique VPN nodes referenced by these | |
2768 | * monitors. | |
2769 | * Use a skiplist for speed. | |
2770 | */ | |
2771 | skiplist_insert(vpn_node_sl, em->node, em->node); | |
2772 | } | |
2773 | ||
2774 | ||
2775 | /* | |
2776 | * for each VPN node referenced in the ENCAP monitors: | |
2777 | */ | |
fe08ba7e | 2778 | struct agg_node *rn; |
d62a17ae | 2779 | while (!skiplist_first(vpn_node_sl, (void **)&rn, NULL)) { |
2780 | if (!wcb->node->info) { | |
2781 | struct rfapi_monitor_vpn *moved; | |
2782 | ||
2783 | moved = rfapiMonitorMoveShorter(rn, 0); | |
2784 | if (moved) { | |
2785 | // rfapiDoRouteCallback(wcb->import_table, | |
2786 | // moved->node, moved); | |
2787 | rfapiMonitorMovedUp(wcb->import_table, rn, | |
2788 | moved->node, moved); | |
2789 | } | |
2790 | } else { | |
2791 | // rfapiDoRouteCallback(wcb->import_table, rn, NULL); | |
2792 | rfapiMonitorItNodeChanged(wcb->import_table, rn, NULL); | |
2793 | } | |
2794 | skiplist_delete_first(vpn_node_sl); | |
2795 | } | |
65efcfce LB |
2796 | |
2797 | done: | |
d62a17ae | 2798 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_ENCAP, 1); |
fe08ba7e | 2799 | agg_unlock_node(wcb->node); /* decr ref count */ |
d62a17ae | 2800 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); |
2801 | skiplist_free(vpn_node_sl); | |
2802 | return 0; | |
65efcfce LB |
2803 | } |
2804 | ||
2805 | ||
2806 | /* | |
2807 | * Works for both VPN and ENCAP routes; timer_service_func is different | |
2808 | * in each case | |
2809 | */ | |
2810 | static void | |
d62a17ae | 2811 | rfapiBiStartWithdrawTimer(struct rfapi_import_table *import_table, |
40381db7 | 2812 | struct agg_node *rn, struct bgp_path_info *bpi, |
4b7e6066 | 2813 | afi_t afi, safi_t safi, |
d62a17ae | 2814 | int (*timer_service_func)(struct thread *)) |
65efcfce | 2815 | { |
d62a17ae | 2816 | uint32_t lifetime; |
2817 | struct rfapi_withdraw *wcb; | |
2818 | ||
40381db7 | 2819 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
a8fd6fde QY |
2820 | /* |
2821 | * Already on the path to being withdrawn, | |
2822 | * should already have a timer set up to | |
2823 | * delete it. | |
2824 | */ | |
2825 | vnc_zlog_debug_verbose( | |
2826 | "%s: already being withdrawn, do nothing", __func__); | |
2827 | return; | |
2828 | } | |
d62a17ae | 2829 | |
40381db7 | 2830 | rfapiGetVncLifetime(bpi->attr, &lifetime); |
d62a17ae | 2831 | vnc_zlog_debug_verbose("%s: VNC lifetime is %u", __func__, lifetime); |
2832 | ||
2833 | /* | |
2834 | * withdrawn routes get to hang around for a while | |
2835 | */ | |
40381db7 | 2836 | SET_FLAG(bpi->flags, BGP_PATH_REMOVED); |
d62a17ae | 2837 | |
2838 | /* set timer to remove the route later */ | |
2839 | lifetime = rfapiGetHolddownFromLifetime(lifetime); | |
2840 | vnc_zlog_debug_verbose("%s: using timeout %u", __func__, lifetime); | |
2841 | ||
2842 | /* | |
2843 | * Stash import_table, node, and info for use by timer | |
2844 | * service routine, which is supposed to free the wcb. | |
2845 | */ | |
2846 | wcb = XCALLOC(MTYPE_RFAPI_WITHDRAW, sizeof(struct rfapi_withdraw)); | |
2847 | assert(wcb); | |
2848 | wcb->node = rn; | |
40381db7 | 2849 | wcb->info = bpi; |
d62a17ae | 2850 | wcb->import_table = import_table; |
40381db7 | 2851 | bgp_attr_intern(bpi->attr); |
d62a17ae | 2852 | |
2853 | if (VNC_DEBUG(VERBOSE)) { | |
2854 | vnc_zlog_debug_verbose( | |
40381db7 | 2855 | "%s: wcb values: node=%p, info=%p, import_table=%p (bpi follows)", |
d62a17ae | 2856 | __func__, wcb->node, wcb->info, wcb->import_table); |
40381db7 | 2857 | rfapiPrintBi(NULL, bpi); |
d62a17ae | 2858 | } |
2859 | ||
2860 | ||
40381db7 | 2861 | assert(bpi->extra); |
d62a17ae | 2862 | if (lifetime > UINT32_MAX / 1001) { |
2863 | /* sub-optimal case, but will probably never happen */ | |
40381db7 | 2864 | bpi->extra->vnc.import.timer = NULL; |
d62a17ae | 2865 | thread_add_timer(bm->master, timer_service_func, wcb, lifetime, |
40381db7 | 2866 | &bpi->extra->vnc.import.timer); |
d62a17ae | 2867 | } else { |
2868 | static uint32_t jitter; | |
2869 | uint32_t lifetime_msec; | |
2870 | ||
2871 | /* | |
2872 | * the goal here is to spread out the timers so they are | |
2873 | * sortable in the skip list | |
2874 | */ | |
2875 | if (++jitter >= 1000) | |
2876 | jitter = 0; | |
2877 | ||
2878 | lifetime_msec = (lifetime * 1000) + jitter; | |
2879 | ||
40381db7 | 2880 | bpi->extra->vnc.import.timer = NULL; |
d62a17ae | 2881 | thread_add_timer_msec(bm->master, timer_service_func, wcb, |
2882 | lifetime_msec, | |
40381db7 | 2883 | &bpi->extra->vnc.import.timer); |
d62a17ae | 2884 | } |
2885 | ||
1defdda8 | 2886 | /* re-sort route list (BGP_PATH_REMOVED routes are last) */ |
4b7e6066 | 2887 | if (((struct bgp_path_info *)rn->info)->next) { |
40381db7 DS |
2888 | rfapiBgpInfoDetach(rn, bpi); |
2889 | rfapiBgpInfoAttachSorted(rn, bpi, afi, safi); | |
d62a17ae | 2890 | } |
65efcfce LB |
2891 | } |
2892 | ||
2893 | ||
d62a17ae | 2894 | typedef void(rfapi_bi_filtered_import_f)(struct rfapi_import_table *, int, |
2895 | struct peer *, void *, struct prefix *, | |
2896 | struct prefix *, afi_t, | |
2897 | struct prefix_rd *, struct attr *, | |
d7c0a89a | 2898 | uint8_t, uint8_t, uint32_t *); |
65efcfce LB |
2899 | |
2900 | ||
d62a17ae | 2901 | static void rfapiExpireEncapNow(struct rfapi_import_table *it, |
40381db7 | 2902 | struct agg_node *rn, struct bgp_path_info *bpi) |
65efcfce | 2903 | { |
d62a17ae | 2904 | struct rfapi_withdraw *wcb; |
2905 | struct thread t; | |
2906 | ||
2907 | /* | |
2908 | * pretend we're an expiring timer | |
2909 | */ | |
2910 | wcb = XCALLOC(MTYPE_RFAPI_WITHDRAW, sizeof(struct rfapi_withdraw)); | |
40381db7 | 2911 | wcb->info = bpi; |
d62a17ae | 2912 | wcb->node = rn; |
2913 | wcb->import_table = it; | |
2914 | memset(&t, 0, sizeof(t)); | |
2915 | t.arg = wcb; | |
2916 | rfapiWithdrawTimerEncap(&t); /* frees wcb */ | |
65efcfce LB |
2917 | } |
2918 | ||
d62a17ae | 2919 | static int rfapiGetNexthop(struct attr *attr, struct prefix *prefix) |
65efcfce | 2920 | { |
d62a17ae | 2921 | switch (BGP_MP_NEXTHOP_FAMILY(attr->mp_nexthop_len)) { |
2922 | case AF_INET: | |
2923 | prefix->family = AF_INET; | |
2924 | prefix->prefixlen = 32; | |
2925 | prefix->u.prefix4 = attr->mp_nexthop_global_in; | |
2926 | break; | |
2927 | case AF_INET6: | |
2928 | prefix->family = AF_INET6; | |
2929 | prefix->prefixlen = 128; | |
2930 | prefix->u.prefix6 = attr->mp_nexthop_global; | |
2931 | break; | |
2932 | default: | |
2933 | vnc_zlog_debug_verbose("%s: unknown attr->mp_nexthop_len %d", | |
2934 | __func__, attr->mp_nexthop_len); | |
2935 | return EINVAL; | |
2936 | } | |
2937 | return 0; | |
65efcfce LB |
2938 | } |
2939 | ||
d62a17ae | 2940 | /* |
9b6d8fcf | 2941 | * import a bgp_path_info if its route target list intersects with the |
65efcfce LB |
2942 | * import table's route target list |
2943 | */ | |
d62a17ae | 2944 | static void rfapiBgpInfoFilteredImportEncap( |
2945 | struct rfapi_import_table *import_table, int action, struct peer *peer, | |
2946 | void *rfd, /* set for looped back routes */ | |
2947 | struct prefix *p, | |
2948 | struct prefix *aux_prefix, /* Unused for encap routes */ | |
2949 | afi_t afi, struct prefix_rd *prd, | |
9b6d8fcf DS |
2950 | struct attr *attr, /* part of bgp_path_info */ |
2951 | uint8_t type, /* part of bgp_path_info */ | |
2952 | uint8_t sub_type, /* part of bgp_path_info */ | |
2953 | uint32_t *label) /* part of bgp_path_info */ | |
65efcfce | 2954 | { |
fe08ba7e DS |
2955 | struct agg_table *rt = NULL; |
2956 | struct agg_node *rn; | |
4b7e6066 | 2957 | struct bgp_path_info *info_new; |
40381db7 | 2958 | struct bgp_path_info *bpi; |
4b7e6066 | 2959 | struct bgp_path_info *next; |
d62a17ae | 2960 | char buf[BUFSIZ]; |
2961 | ||
40381db7 DS |
2962 | struct prefix p_firstbpi_old; |
2963 | struct prefix p_firstbpi_new; | |
d62a17ae | 2964 | int replacing = 0; |
2965 | const char *action_str = NULL; | |
2966 | struct prefix un_prefix; | |
2967 | ||
2968 | struct bgp *bgp; | |
2969 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
2970 | ||
2971 | switch (action) { | |
2972 | case FIF_ACTION_UPDATE: | |
2973 | action_str = "update"; | |
2974 | break; | |
2975 | case FIF_ACTION_WITHDRAW: | |
2976 | action_str = "withdraw"; | |
2977 | break; | |
2978 | case FIF_ACTION_KILL: | |
2979 | action_str = "kill"; | |
2980 | break; | |
2981 | default: | |
2982 | assert(0); | |
2983 | break; | |
2984 | } | |
2985 | ||
2986 | vnc_zlog_debug_verbose( | |
2987 | "%s: entry: %s: prefix %s/%d", __func__, action_str, | |
2988 | inet_ntop(p->family, &p->u.prefix, buf, BUFSIZ), p->prefixlen); | |
2989 | ||
40381db7 DS |
2990 | memset(&p_firstbpi_old, 0, sizeof(p_firstbpi_old)); |
2991 | memset(&p_firstbpi_new, 0, sizeof(p_firstbpi_new)); | |
d62a17ae | 2992 | |
2993 | if (action == FIF_ACTION_UPDATE) { | |
2994 | /* | |
2995 | * Compare rt lists. If no intersection, don't import this route | |
2996 | * On a withdraw, peer and RD are sufficient to determine if | |
2997 | * we should act. | |
2998 | */ | |
2999 | if (!attr || !attr->ecommunity) { | |
3000 | ||
3001 | vnc_zlog_debug_verbose( | |
3002 | "%s: attr, extra, or ecommunity missing, not importing", | |
3003 | __func__); | |
3004 | return; | |
3005 | } | |
65efcfce | 3006 | #if RFAPI_REQUIRE_ENCAP_BEEC |
d62a17ae | 3007 | if (!rfapiEcommunitiesMatchBeec(attr->ecommunity)) { |
3008 | vnc_zlog_debug_verbose( | |
3009 | "%s: it=%p: no match for BGP Encapsulation ecommunity", | |
3010 | __func__, import_table); | |
3011 | return; | |
3012 | } | |
65efcfce | 3013 | #endif |
d62a17ae | 3014 | if (!rfapiEcommunitiesIntersect(import_table->rt_import_list, |
3015 | attr->ecommunity)) { | |
3016 | ||
3017 | vnc_zlog_debug_verbose( | |
3018 | "%s: it=%p: no ecommunity intersection", | |
3019 | __func__, import_table); | |
3020 | return; | |
3021 | } | |
3022 | ||
3023 | /* | |
3024 | * Updates must also have a nexthop address | |
3025 | */ | |
3026 | memset(&un_prefix, 0, | |
3027 | sizeof(un_prefix)); /* keep valgrind happy */ | |
3028 | if (rfapiGetNexthop(attr, &un_prefix)) { | |
3029 | vnc_zlog_debug_verbose("%s: missing nexthop address", | |
3030 | __func__); | |
3031 | return; | |
3032 | } | |
3033 | } | |
3034 | ||
3035 | /* | |
3036 | * Figure out which radix tree the route would go into | |
3037 | */ | |
3038 | switch (afi) { | |
3039 | case AFI_IP: | |
3040 | case AFI_IP6: | |
3041 | rt = import_table->imported_encap[afi]; | |
3042 | break; | |
3043 | ||
3044 | default: | |
450971aa | 3045 | flog_err(EC_LIB_DEVELOPMENT, "%s: bad afi %d", __func__, afi); |
d62a17ae | 3046 | return; |
3047 | } | |
3048 | ||
3049 | /* | |
fe08ba7e | 3050 | * agg_node_lookup returns a node only if there is at least |
d62a17ae | 3051 | * one route attached. |
3052 | */ | |
fe08ba7e | 3053 | rn = agg_node_lookup(rt, p); |
65efcfce LB |
3054 | |
3055 | #if DEBUG_ENCAP_MONITOR | |
d62a17ae | 3056 | vnc_zlog_debug_verbose("%s: initial encap lookup(it=%p) rn=%p", |
3057 | __func__, import_table, rn); | |
65efcfce LB |
3058 | #endif |
3059 | ||
d62a17ae | 3060 | if (rn) { |
3061 | ||
3062 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, 1); | |
fe08ba7e | 3063 | agg_unlock_node(rn); /* undo lock in agg_node_lookup */ |
d62a17ae | 3064 | |
3065 | ||
3066 | /* | |
40381db7 | 3067 | * capture nexthop of first bpi |
d62a17ae | 3068 | */ |
3069 | if (rn->info) { | |
3070 | rfapiNexthop2Prefix( | |
4b7e6066 | 3071 | ((struct bgp_path_info *)(rn->info))->attr, |
40381db7 | 3072 | &p_firstbpi_old); |
d62a17ae | 3073 | } |
3074 | ||
40381db7 | 3075 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 3076 | |
3077 | /* | |
9b6d8fcf | 3078 | * Does this bgp_path_info refer to the same route |
d62a17ae | 3079 | * as we are trying to add? |
3080 | */ | |
40381db7 DS |
3081 | vnc_zlog_debug_verbose("%s: comparing BPI %p", __func__, |
3082 | bpi); | |
d62a17ae | 3083 | |
3084 | ||
3085 | /* | |
3086 | * Compare RDs | |
3087 | * | |
40381db7 DS |
3088 | * RD of import table bpi is in |
3089 | * bpi->extra->vnc.import.rd RD of info_orig is in prd | |
d62a17ae | 3090 | */ |
40381db7 DS |
3091 | if (!bpi->extra) { |
3092 | vnc_zlog_debug_verbose("%s: no bpi->extra", | |
d62a17ae | 3093 | __func__); |
3094 | continue; | |
3095 | } | |
3096 | if (prefix_cmp( | |
40381db7 | 3097 | (struct prefix *)&bpi->extra->vnc.import.rd, |
d62a17ae | 3098 | (struct prefix *)prd)) { |
3099 | ||
3100 | vnc_zlog_debug_verbose("%s: prd does not match", | |
3101 | __func__); | |
3102 | continue; | |
3103 | } | |
3104 | ||
3105 | /* | |
3106 | * Compare peers | |
3107 | */ | |
40381db7 | 3108 | if (bpi->peer != peer) { |
d62a17ae | 3109 | vnc_zlog_debug_verbose( |
3110 | "%s: peer does not match", __func__); | |
3111 | continue; | |
3112 | } | |
3113 | ||
40381db7 | 3114 | vnc_zlog_debug_verbose("%s: found matching bpi", |
d62a17ae | 3115 | __func__); |
3116 | ||
40381db7 | 3117 | /* Same route. Delete this bpi, replace with new one */ |
d62a17ae | 3118 | |
3119 | if (action == FIF_ACTION_WITHDRAW) { | |
3120 | ||
3121 | vnc_zlog_debug_verbose( | |
3122 | "%s: withdrawing at prefix %s/%d", | |
3123 | __func__, | |
3124 | inet_ntop(rn->p.family, &rn->p.u.prefix, | |
3125 | buf, BUFSIZ), | |
3126 | rn->p.prefixlen); | |
3127 | ||
3128 | rfapiBiStartWithdrawTimer( | |
40381db7 | 3129 | import_table, rn, bpi, afi, SAFI_ENCAP, |
d62a17ae | 3130 | rfapiWithdrawTimerEncap); |
3131 | ||
3132 | } else { | |
3133 | vnc_zlog_debug_verbose( | |
3134 | "%s: %s at prefix %s/%d", __func__, | |
3135 | ((action == FIF_ACTION_KILL) | |
3136 | ? "killing" | |
3137 | : "replacing"), | |
3138 | inet_ntop(rn->p.family, &rn->p.u.prefix, | |
3139 | buf, BUFSIZ), | |
3140 | rn->p.prefixlen); | |
3141 | ||
3142 | /* | |
3143 | * If this route is waiting to be deleted | |
3144 | * because of | |
3145 | * a previous withdraw, we must cancel its | |
3146 | * timer. | |
3147 | */ | |
40381db7 DS |
3148 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
3149 | && bpi->extra->vnc.import.timer) { | |
d62a17ae | 3150 | |
3151 | struct thread *t = | |
40381db7 | 3152 | (struct thread *)bpi->extra->vnc |
d62a17ae | 3153 | .import.timer; |
3154 | struct rfapi_withdraw *wcb = t->arg; | |
3155 | ||
3156 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
3157 | thread_cancel(t); | |
3158 | } | |
3159 | ||
3160 | if (action == FIF_ACTION_UPDATE) { | |
40381db7 DS |
3161 | rfapiBgpInfoDetach(rn, bpi); |
3162 | rfapiBgpInfoFree(bpi); | |
d62a17ae | 3163 | replacing = 1; |
3164 | } else { | |
3165 | /* | |
3166 | * Kill: do export stuff when removing | |
40381db7 | 3167 | * bpi |
d62a17ae | 3168 | */ |
3169 | struct rfapi_withdraw *wcb; | |
3170 | struct thread t; | |
3171 | ||
3172 | /* | |
3173 | * pretend we're an expiring timer | |
3174 | */ | |
3175 | wcb = XCALLOC( | |
3176 | MTYPE_RFAPI_WITHDRAW, | |
3177 | sizeof(struct rfapi_withdraw)); | |
40381db7 | 3178 | wcb->info = bpi; |
d62a17ae | 3179 | wcb->node = rn; |
3180 | wcb->import_table = import_table; | |
3181 | memset(&t, 0, sizeof(t)); | |
3182 | t.arg = wcb; | |
3183 | rfapiWithdrawTimerEncap( | |
3184 | &t); /* frees wcb */ | |
3185 | } | |
3186 | } | |
3187 | ||
3188 | break; | |
3189 | } | |
3190 | } | |
3191 | ||
3192 | if (rn) | |
3193 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, replacing ? 1 : 0); | |
3194 | ||
3195 | if (action == FIF_ACTION_WITHDRAW || action == FIF_ACTION_KILL) | |
3196 | return; | |
3197 | ||
3198 | info_new = | |
3199 | rfapiBgpInfoCreate(attr, peer, rfd, prd, type, sub_type, NULL); | |
3200 | ||
3201 | if (rn) { | |
3202 | if (!replacing) | |
40381db7 | 3203 | agg_lock_node(rn); /* incr ref count for new BPI */ |
d62a17ae | 3204 | } else { |
fe08ba7e | 3205 | rn = agg_node_get(rt, p); |
d62a17ae | 3206 | } |
3207 | ||
3208 | vnc_zlog_debug_verbose( | |
3209 | "%s: (afi=%d, rn=%p) inserting at prefix %s/%d", __func__, afi, | |
3210 | rn, inet_ntop(rn->p.family, &rn->p.u.prefix, buf, BUFSIZ), | |
3211 | rn->p.prefixlen); | |
3212 | ||
3213 | rfapiBgpInfoAttachSorted(rn, info_new, afi, SAFI_ENCAP); | |
3214 | ||
3215 | /* | |
3216 | * Delete holddown routes from same NVE. See details in | |
3217 | * rfapiBgpInfoFilteredImportVPN() | |
3218 | */ | |
40381db7 | 3219 | for (bpi = info_new->next; bpi; bpi = next) { |
d62a17ae | 3220 | |
3221 | struct prefix pfx_un; | |
3222 | int un_match = 0; | |
3223 | ||
40381db7 DS |
3224 | next = bpi->next; |
3225 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) | |
d62a17ae | 3226 | continue; |
3227 | ||
3228 | /* | |
3229 | * We already match the VN address (it is the prefix | |
3230 | * of the route node) | |
3231 | */ | |
3232 | ||
40381db7 | 3233 | if (!rfapiGetNexthop(bpi->attr, &pfx_un) |
d62a17ae | 3234 | && prefix_same(&pfx_un, &un_prefix)) { |
3235 | ||
3236 | un_match = 1; | |
3237 | } | |
3238 | ||
3239 | if (!un_match) | |
3240 | continue; | |
3241 | ||
3242 | vnc_zlog_debug_verbose( | |
40381db7 | 3243 | "%s: removing holddown bpi matching NVE of new route", |
d62a17ae | 3244 | __func__); |
40381db7 | 3245 | if (bpi->extra->vnc.import.timer) { |
d62a17ae | 3246 | struct thread *t = |
40381db7 | 3247 | (struct thread *)bpi->extra->vnc.import.timer; |
d62a17ae | 3248 | struct rfapi_withdraw *wcb = t->arg; |
3249 | ||
3250 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
3251 | thread_cancel(t); | |
3252 | } | |
40381db7 | 3253 | rfapiExpireEncapNow(import_table, rn, bpi); |
d62a17ae | 3254 | } |
3255 | ||
4b7e6066 | 3256 | rfapiNexthop2Prefix(((struct bgp_path_info *)(rn->info))->attr, |
40381db7 | 3257 | &p_firstbpi_new); |
d62a17ae | 3258 | |
3259 | /* | |
3260 | * If the nexthop address of the selected Encap route (i.e., | |
3261 | * the UN address) has changed, then we must update the VPN | |
3262 | * routes that refer to this Encap route and possibly force | |
3263 | * rfapi callbacks. | |
3264 | */ | |
40381db7 | 3265 | if (rfapiAttrNexthopAddrDifferent(&p_firstbpi_old, &p_firstbpi_new)) { |
d62a17ae | 3266 | |
3267 | struct rfapi_monitor_encap *m; | |
3268 | struct rfapi_monitor_encap *mnext; | |
3269 | ||
fe08ba7e | 3270 | struct agg_node *referenced_vpn_prefix; |
d62a17ae | 3271 | |
3272 | /* | |
3273 | * Optimized approach: build radix tree on the fly to | |
3274 | * hold list of VPN nodes referenced by the ENCAP monitors | |
3275 | * | |
3276 | * The nodes in this table correspond to prefixes of VPN routes. | |
3277 | * The "info" pointer of the node points to a chain of | |
3278 | * struct rfapi_monitor_encap, each of which refers to a | |
3279 | * specific VPN node. | |
3280 | */ | |
fe08ba7e | 3281 | struct agg_table *referenced_vpn_table; |
d62a17ae | 3282 | |
fe08ba7e | 3283 | referenced_vpn_table = agg_table_init(); |
d62a17ae | 3284 | assert(referenced_vpn_table); |
3285 | ||
3286 | /* | |
3287 | * iterate over the set of monitors at this ENCAP node. | |
3288 | */ | |
65efcfce | 3289 | #if DEBUG_ENCAP_MONITOR |
d62a17ae | 3290 | vnc_zlog_debug_verbose("%s: examining monitors at rn=%p", |
3291 | __func__, rn); | |
65efcfce | 3292 | #endif |
d62a17ae | 3293 | for (m = RFAPI_MONITOR_ENCAP(rn); m; m = m->next) { |
3294 | ||
3295 | /* | |
40381db7 | 3296 | * For each referenced bpi/route, copy the ENCAP route's |
d62a17ae | 3297 | * nexthop to the VPN route's cached UN address field |
3298 | * and set | |
3299 | * the address family of the cached UN address field. | |
3300 | */ | |
40381db7 DS |
3301 | rfapiCopyUnEncap2VPN(info_new, m->bpi); |
3302 | if (!CHECK_FLAG(m->bpi->flags, BGP_PATH_VALID)) { | |
3303 | SET_FLAG(m->bpi->flags, BGP_PATH_VALID); | |
3304 | if (VALID_INTERIOR_TYPE(m->bpi->type)) | |
d62a17ae | 3305 | RFAPI_MONITOR_EXTERIOR(m->node) |
3306 | ->valid_interior_count++; | |
3307 | vnc_import_bgp_exterior_add_route_interior( | |
40381db7 | 3308 | bgp, import_table, m->node, m->bpi); |
d62a17ae | 3309 | } |
3310 | ||
3311 | /* | |
3312 | * Build a list of unique VPN nodes referenced by these | |
3313 | * monitors | |
3314 | * | |
3315 | * There could be more than one VPN node here with a | |
3316 | * given | |
3317 | * prefix. Those are currently in an unsorted linear | |
3318 | * list | |
3319 | * per prefix. | |
3320 | */ | |
3321 | ||
fe08ba7e DS |
3322 | referenced_vpn_prefix = |
3323 | agg_node_get(referenced_vpn_table, &m->node->p); | |
d62a17ae | 3324 | assert(referenced_vpn_prefix); |
3325 | for (mnext = referenced_vpn_prefix->info; mnext; | |
3326 | mnext = mnext->next) { | |
3327 | ||
3328 | if (mnext->node == m->node) | |
3329 | break; | |
3330 | } | |
3331 | ||
3332 | if (mnext) { | |
3333 | /* | |
3334 | * already have an entry for this VPN node | |
3335 | */ | |
fe08ba7e | 3336 | agg_unlock_node(referenced_vpn_prefix); |
d62a17ae | 3337 | } else { |
3338 | mnext = XCALLOC( | |
3339 | MTYPE_RFAPI_MONITOR_ENCAP, | |
3340 | sizeof(struct rfapi_monitor_encap)); | |
3341 | assert(mnext); | |
3342 | mnext->node = m->node; | |
3343 | mnext->next = referenced_vpn_prefix->info; | |
3344 | referenced_vpn_prefix->info = mnext; | |
3345 | } | |
3346 | } | |
3347 | ||
3348 | /* | |
3349 | * for each VPN node referenced in the ENCAP monitors: | |
3350 | */ | |
fe08ba7e DS |
3351 | for (referenced_vpn_prefix = |
3352 | agg_route_top(referenced_vpn_table); | |
3353 | referenced_vpn_prefix; | |
3354 | referenced_vpn_prefix = | |
3355 | agg_route_next(referenced_vpn_prefix)) { | |
d62a17ae | 3356 | |
3357 | while ((m = referenced_vpn_prefix->info)) { | |
3358 | ||
fe08ba7e | 3359 | struct agg_node *n; |
d62a17ae | 3360 | |
3361 | rfapiMonitorMoveLonger(m->node); | |
fe08ba7e | 3362 | for (n = m->node; n; n = agg_node_parent(n)) { |
d62a17ae | 3363 | // rfapiDoRouteCallback(import_table, n, |
3364 | // NULL); | |
3365 | } | |
3366 | rfapiMonitorItNodeChanged(import_table, m->node, | |
3367 | NULL); | |
3368 | ||
3369 | referenced_vpn_prefix->info = m->next; | |
fe08ba7e | 3370 | agg_unlock_node(referenced_vpn_prefix); |
d62a17ae | 3371 | XFREE(MTYPE_RFAPI_MONITOR_ENCAP, m); |
3372 | } | |
3373 | } | |
fe08ba7e | 3374 | agg_table_finish(referenced_vpn_table); |
d62a17ae | 3375 | } |
3376 | ||
3377 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, 0); | |
65efcfce LB |
3378 | } |
3379 | ||
d62a17ae | 3380 | static void rfapiExpireVpnNow(struct rfapi_import_table *it, |
40381db7 | 3381 | struct agg_node *rn, struct bgp_path_info *bpi, |
d62a17ae | 3382 | int lockoffset) |
65efcfce | 3383 | { |
d62a17ae | 3384 | struct rfapi_withdraw *wcb; |
3385 | struct thread t; | |
3386 | ||
3387 | /* | |
3388 | * pretend we're an expiring timer | |
3389 | */ | |
3390 | wcb = XCALLOC(MTYPE_RFAPI_WITHDRAW, sizeof(struct rfapi_withdraw)); | |
40381db7 | 3391 | wcb->info = bpi; |
d62a17ae | 3392 | wcb->node = rn; |
3393 | wcb->import_table = it; | |
3394 | wcb->lockoffset = lockoffset; | |
3395 | memset(&t, 0, sizeof(t)); | |
3396 | t.arg = wcb; | |
3397 | rfapiWithdrawTimerVPN(&t); /* frees wcb */ | |
65efcfce LB |
3398 | } |
3399 | ||
3400 | ||
d62a17ae | 3401 | /* |
9b6d8fcf | 3402 | * import a bgp_path_info if its route target list intersects with the |
65efcfce LB |
3403 | * import table's route target list |
3404 | */ | |
d62a17ae | 3405 | void rfapiBgpInfoFilteredImportVPN( |
3406 | struct rfapi_import_table *import_table, int action, struct peer *peer, | |
3407 | void *rfd, /* set for looped back routes */ | |
3408 | struct prefix *p, | |
3409 | struct prefix *aux_prefix, /* AFI_L2VPN: optional IP */ | |
3410 | afi_t afi, struct prefix_rd *prd, | |
9b6d8fcf DS |
3411 | struct attr *attr, /* part of bgp_path_info */ |
3412 | uint8_t type, /* part of bgp_path_info */ | |
3413 | uint8_t sub_type, /* part of bgp_path_info */ | |
3414 | uint32_t *label) /* part of bgp_path_info */ | |
65efcfce | 3415 | { |
fe08ba7e DS |
3416 | struct agg_table *rt = NULL; |
3417 | struct agg_node *rn; | |
3418 | struct agg_node *n; | |
4b7e6066 | 3419 | struct bgp_path_info *info_new; |
40381db7 | 3420 | struct bgp_path_info *bpi; |
4b7e6066 | 3421 | struct bgp_path_info *next; |
d62a17ae | 3422 | char buf[BUFSIZ]; |
3423 | struct prefix vn_prefix; | |
3424 | struct prefix un_prefix; | |
3425 | int un_prefix_valid = 0; | |
fe08ba7e | 3426 | struct agg_node *ern; |
d62a17ae | 3427 | int replacing = 0; |
3428 | int original_had_routes = 0; | |
3429 | struct prefix original_nexthop; | |
3430 | const char *action_str = NULL; | |
3431 | int is_it_ce = 0; | |
3432 | ||
3433 | struct bgp *bgp; | |
3434 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
3435 | ||
3436 | switch (action) { | |
3437 | case FIF_ACTION_UPDATE: | |
3438 | action_str = "update"; | |
3439 | break; | |
3440 | case FIF_ACTION_WITHDRAW: | |
3441 | action_str = "withdraw"; | |
3442 | break; | |
3443 | case FIF_ACTION_KILL: | |
3444 | action_str = "kill"; | |
3445 | break; | |
3446 | default: | |
3447 | assert(0); | |
3448 | break; | |
3449 | } | |
3450 | ||
3451 | if (import_table == bgp->rfapi->it_ce) | |
3452 | is_it_ce = 1; | |
3453 | ||
3454 | vnc_zlog_debug_verbose("%s: entry: %s%s: prefix %s/%d: it %p, afi %s", | |
3455 | __func__, (is_it_ce ? "CE-IT " : ""), action_str, | |
3456 | rfapi_ntop(p->family, &p->u.prefix, buf, BUFSIZ), | |
3457 | p->prefixlen, import_table, afi2str(afi)); | |
3458 | ||
3459 | VNC_ITRCCK; | |
3460 | ||
3461 | /* | |
3462 | * Compare rt lists. If no intersection, don't import this route | |
3463 | * On a withdraw, peer and RD are sufficient to determine if | |
3464 | * we should act. | |
3465 | */ | |
3466 | if (action == FIF_ACTION_UPDATE) { | |
3467 | if (!attr || !attr->ecommunity) { | |
3468 | ||
3469 | vnc_zlog_debug_verbose( | |
3470 | "%s: attr, extra, or ecommunity missing, not importing", | |
3471 | __func__); | |
3472 | return; | |
3473 | } | |
3474 | if ((import_table != bgp->rfapi->it_ce) | |
3475 | && !rfapiEcommunitiesIntersect(import_table->rt_import_list, | |
3476 | attr->ecommunity)) { | |
3477 | ||
3478 | vnc_zlog_debug_verbose( | |
3479 | "%s: it=%p: no ecommunity intersection", | |
3480 | __func__, import_table); | |
3481 | return; | |
3482 | } | |
3483 | ||
3484 | memset(&vn_prefix, 0, | |
3485 | sizeof(vn_prefix)); /* keep valgrind happy */ | |
3486 | if (rfapiGetNexthop(attr, &vn_prefix)) { | |
3487 | /* missing nexthop address would be a bad, bad thing */ | |
3488 | vnc_zlog_debug_verbose("%s: missing nexthop", __func__); | |
3489 | return; | |
3490 | } | |
3491 | } | |
3492 | ||
3493 | /* | |
3494 | * Figure out which radix tree the route would go into | |
3495 | */ | |
3496 | switch (afi) { | |
3497 | case AFI_IP: | |
3498 | case AFI_IP6: | |
3499 | case AFI_L2VPN: | |
3500 | rt = import_table->imported_vpn[afi]; | |
3501 | break; | |
3502 | ||
3503 | default: | |
450971aa | 3504 | flog_err(EC_LIB_DEVELOPMENT, "%s: bad afi %d", __func__, afi); |
d62a17ae | 3505 | return; |
3506 | } | |
3507 | ||
3508 | /* clear it */ | |
3509 | memset(&original_nexthop, 0, sizeof(original_nexthop)); | |
3510 | ||
3511 | /* | |
fe08ba7e | 3512 | * agg_node_lookup returns a node only if there is at least |
d62a17ae | 3513 | * one route attached. |
3514 | */ | |
fe08ba7e | 3515 | rn = agg_node_lookup(rt, p); |
d62a17ae | 3516 | |
3517 | vnc_zlog_debug_verbose("%s: rn=%p", __func__, rn); | |
3518 | ||
3519 | if (rn) { | |
3520 | ||
3521 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, 1); | |
fe08ba7e | 3522 | agg_unlock_node(rn); /* undo lock in agg_node_lookup */ |
d62a17ae | 3523 | |
3524 | if (rn->info) | |
3525 | original_had_routes = 1; | |
3526 | ||
3527 | if (VNC_DEBUG(VERBOSE)) { | |
3528 | vnc_zlog_debug_verbose("%s: showing IT node on entry", | |
3529 | __func__); | |
3530 | rfapiShowItNode(NULL, rn); /* debug */ | |
3531 | } | |
3532 | ||
3533 | /* | |
3534 | * Look for same route (will have same RD and peer) | |
3535 | */ | |
40381db7 | 3536 | bpi = rfapiItBiIndexSearch(rn, prd, peer, aux_prefix); |
d62a17ae | 3537 | |
40381db7 | 3538 | if (bpi) { |
d62a17ae | 3539 | |
3540 | /* | |
3541 | * This was an old test when we iterated over the | |
40381db7 | 3542 | * BPIs linearly. Since we're now looking up with |
d62a17ae | 3543 | * RD and peer, comparing types should not be |
3544 | * needed. Changed to assertion. | |
3545 | * | |
3546 | * Compare types. Doing so prevents a RFP-originated | |
3547 | * route from matching an imported route, for example. | |
3548 | */ | |
40381db7 | 3549 | if (VNC_DEBUG(VERBOSE) && bpi->type != type) |
3af8cb57 | 3550 | /* should be handled by RDs, but warn for now */ |
40381db7 DS |
3551 | zlog_warn("%s: type mismatch! (bpi=%d, arg=%d)", |
3552 | __func__, bpi->type, type); | |
d62a17ae | 3553 | |
40381db7 | 3554 | vnc_zlog_debug_verbose("%s: found matching bpi", |
d62a17ae | 3555 | __func__); |
3556 | ||
3557 | /* | |
3558 | * In the special CE table, withdrawals occur without | |
3559 | * holddown | |
3560 | */ | |
3561 | if (import_table == bgp->rfapi->it_ce) { | |
40381db7 | 3562 | vnc_direct_bgp_del_route_ce(bgp, rn, bpi); |
d62a17ae | 3563 | if (action == FIF_ACTION_WITHDRAW) |
3564 | action = FIF_ACTION_KILL; | |
3565 | } | |
3566 | ||
3567 | if (action == FIF_ACTION_WITHDRAW) { | |
3568 | ||
40381db7 DS |
3569 | int washolddown = CHECK_FLAG(bpi->flags, |
3570 | BGP_PATH_REMOVED); | |
d62a17ae | 3571 | |
3572 | vnc_zlog_debug_verbose( | |
3573 | "%s: withdrawing at prefix %s/%d%s", | |
9d303b37 DL |
3574 | __func__, rfapi_ntop(rn->p.family, |
3575 | &rn->p.u.prefix, | |
3576 | buf, BUFSIZ), | |
d62a17ae | 3577 | rn->p.prefixlen, |
3578 | (washolddown | |
3579 | ? " (already being withdrawn)" | |
3580 | : "")); | |
3581 | ||
3582 | VNC_ITRCCK; | |
3583 | if (!washolddown) { | |
3584 | rfapiBiStartWithdrawTimer( | |
40381db7 | 3585 | import_table, rn, bpi, afi, |
d62a17ae | 3586 | SAFI_MPLS_VPN, |
3587 | rfapiWithdrawTimerVPN); | |
3588 | ||
3589 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 3590 | bpi, import_table, afi, -1); |
d62a17ae | 3591 | import_table->holddown_count[afi] += 1; |
3592 | } | |
3593 | VNC_ITRCCK; | |
3594 | } else { | |
3595 | vnc_zlog_debug_verbose( | |
3596 | "%s: %s at prefix %s/%d", __func__, | |
3597 | ((action == FIF_ACTION_KILL) | |
3598 | ? "killing" | |
3599 | : "replacing"), | |
3600 | rfapi_ntop(rn->p.family, | |
3601 | &rn->p.u.prefix, buf, | |
3602 | BUFSIZ), | |
3603 | rn->p.prefixlen); | |
3604 | ||
3605 | /* | |
3606 | * If this route is waiting to be deleted | |
3607 | * because of | |
3608 | * a previous withdraw, we must cancel its | |
3609 | * timer. | |
3610 | */ | |
40381db7 DS |
3611 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
3612 | && bpi->extra->vnc.import.timer) { | |
d62a17ae | 3613 | |
3614 | struct thread *t = | |
40381db7 | 3615 | (struct thread *)bpi->extra->vnc |
d62a17ae | 3616 | .import.timer; |
3617 | struct rfapi_withdraw *wcb = t->arg; | |
3618 | ||
3619 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
3620 | thread_cancel(t); | |
3621 | ||
3622 | import_table->holddown_count[afi] -= 1; | |
3623 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 3624 | bpi, import_table, afi, 1); |
d62a17ae | 3625 | } |
3626 | /* | |
3627 | * decrement remote count (if route is remote) | |
3628 | * because | |
3629 | * we are going to remove it below | |
3630 | */ | |
40381db7 DS |
3631 | RFAPI_UPDATE_ITABLE_COUNT(bpi, import_table, |
3632 | afi, -1); | |
d62a17ae | 3633 | if (action == FIF_ACTION_UPDATE) { |
3634 | replacing = 1; | |
3635 | ||
3636 | /* | |
3637 | * make copy of original nexthop so we | |
3638 | * can see if it changed | |
3639 | */ | |
40381db7 | 3640 | rfapiGetNexthop(bpi->attr, |
d62a17ae | 3641 | &original_nexthop); |
3642 | ||
3643 | /* | |
40381db7 | 3644 | * remove bpi without doing any export |
d62a17ae | 3645 | * processing |
3646 | */ | |
40381db7 | 3647 | if (CHECK_FLAG(bpi->flags, |
1defdda8 | 3648 | BGP_PATH_VALID) |
40381db7 | 3649 | && VALID_INTERIOR_TYPE(bpi->type)) |
d62a17ae | 3650 | RFAPI_MONITOR_EXTERIOR(rn) |
3651 | ->valid_interior_count--; | |
40381db7 DS |
3652 | rfapiItBiIndexDel(rn, bpi); |
3653 | rfapiBgpInfoDetach(rn, bpi); | |
3654 | rfapiMonitorEncapDelete(bpi); | |
d62a17ae | 3655 | vnc_import_bgp_exterior_del_route_interior( |
40381db7 DS |
3656 | bgp, import_table, rn, bpi); |
3657 | rfapiBgpInfoFree(bpi); | |
d62a17ae | 3658 | } else { |
3659 | /* Kill */ | |
3660 | /* | |
40381db7 | 3661 | * remove bpi and do export processing |
d62a17ae | 3662 | */ |
3663 | import_table->holddown_count[afi] += 1; | |
40381db7 | 3664 | rfapiExpireVpnNow(import_table, rn, bpi, |
d62a17ae | 3665 | 0); |
3666 | } | |
3667 | } | |
3668 | } | |
3669 | } | |
3670 | ||
3671 | if (rn) | |
3672 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, replacing ? 1 : 0); | |
3673 | ||
3674 | if (action == FIF_ACTION_WITHDRAW || action == FIF_ACTION_KILL) { | |
3675 | VNC_ITRCCK; | |
3676 | return; | |
3677 | } | |
3678 | ||
3679 | info_new = | |
3680 | rfapiBgpInfoCreate(attr, peer, rfd, prd, type, sub_type, label); | |
3681 | ||
3682 | /* | |
3683 | * lookup un address in encap table | |
3684 | */ | |
fe08ba7e | 3685 | ern = agg_node_match(import_table->imported_encap[afi], &vn_prefix); |
d62a17ae | 3686 | if (ern) { |
3687 | rfapiCopyUnEncap2VPN(ern->info, info_new); | |
fe08ba7e | 3688 | agg_unlock_node(ern); /* undo lock in route_note_match */ |
d62a17ae | 3689 | } else { |
f7813c7c | 3690 | char bpf[PREFIX_STRLEN]; |
872ed4c7 | 3691 | |
f7813c7c | 3692 | prefix2str(&vn_prefix, bpf, sizeof(bpf)); |
d62a17ae | 3693 | /* Not a big deal, just means VPN route got here first */ |
3694 | vnc_zlog_debug_verbose("%s: no encap route for vn addr %s", | |
f7813c7c | 3695 | __func__, bpf); |
d62a17ae | 3696 | info_new->extra->vnc.import.un_family = 0; |
3697 | } | |
3698 | ||
3699 | if (rn) { | |
3700 | if (!replacing) | |
fe08ba7e | 3701 | agg_lock_node(rn); |
d62a17ae | 3702 | } else { |
3703 | /* | |
3704 | * No need to increment reference count, so only "get" | |
3705 | * if the node is not there already | |
3706 | */ | |
fe08ba7e | 3707 | rn = agg_node_get(rt, p); |
d62a17ae | 3708 | } |
3709 | ||
3710 | /* | |
3711 | * For ethernet routes, if there is an accompanying IP address, | |
40381db7 | 3712 | * save it in the bpi |
d62a17ae | 3713 | */ |
3714 | if ((AFI_L2VPN == afi) && aux_prefix) { | |
3715 | ||
40381db7 DS |
3716 | vnc_zlog_debug_verbose("%s: setting BPI's aux_prefix", |
3717 | __func__); | |
d62a17ae | 3718 | info_new->extra->vnc.import.aux_prefix = *aux_prefix; |
3719 | } | |
3720 | ||
3721 | vnc_zlog_debug_verbose( | |
40381db7 | 3722 | "%s: inserting bpi %p at prefix %s/%d #%d", __func__, info_new, |
d62a17ae | 3723 | rfapi_ntop(rn->p.family, &rn->p.u.prefix, buf, BUFSIZ), |
3724 | rn->p.prefixlen, rn->lock); | |
3725 | ||
3726 | rfapiBgpInfoAttachSorted(rn, info_new, afi, SAFI_MPLS_VPN); | |
3727 | rfapiItBiIndexAdd(rn, info_new); | |
3728 | if (!rfapiGetUnAddrOfVpnBi(info_new, NULL)) { | |
3729 | if (VALID_INTERIOR_TYPE(info_new->type)) | |
3730 | RFAPI_MONITOR_EXTERIOR(rn)->valid_interior_count++; | |
1defdda8 | 3731 | SET_FLAG(info_new->flags, BGP_PATH_VALID); |
d62a17ae | 3732 | } |
3733 | RFAPI_UPDATE_ITABLE_COUNT(info_new, import_table, afi, 1); | |
3734 | vnc_import_bgp_exterior_add_route_interior(bgp, import_table, rn, | |
3735 | info_new); | |
3736 | ||
3737 | if (import_table == bgp->rfapi->it_ce) | |
3738 | vnc_direct_bgp_add_route_ce(bgp, rn, info_new); | |
3739 | ||
3740 | if (VNC_DEBUG(VERBOSE)) { | |
3741 | vnc_zlog_debug_verbose("%s: showing IT node", __func__); | |
3742 | rfapiShowItNode(NULL, rn); /* debug */ | |
3743 | } | |
3744 | ||
3745 | rfapiMonitorEncapAdd(import_table, &vn_prefix, rn, info_new); | |
3746 | ||
3747 | if (!rfapiGetUnAddrOfVpnBi(info_new, &un_prefix)) { | |
3748 | ||
3749 | /* | |
3750 | * if we have a valid UN address (either via Encap route | |
3751 | * or via tunnel attribute), then we should attempt | |
3752 | * to move any monitors at less-specific nodes to this node | |
3753 | */ | |
3754 | rfapiMonitorMoveLonger(rn); | |
3755 | ||
3756 | un_prefix_valid = 1; | |
3757 | } | |
3758 | ||
3759 | /* | |
3760 | * 101129 Enhancement: if we add a route (implication: it is not | |
3761 | * in holddown), delete all other routes from this nve at this | |
3762 | * node that are in holddown, regardless of peer. | |
3763 | * | |
3764 | * Reasons it's OK to do that: | |
3765 | * | |
3766 | * - if the holddown route being deleted originally came from BGP VPN, | |
3767 | * it is already gone from BGP (implication of holddown), so there | |
3768 | * won't be any added inconsistency with the BGP RIB. | |
3769 | * | |
3770 | * - once a fresh route is added at a prefix, any routes in holddown | |
3771 | * at that prefix will not show up in RFP responses, so deleting | |
3772 | * the holddown routes won't affect the contents of responses. | |
3773 | * | |
3774 | * - lifetimes are supposed to be consistent, so there should not | |
3775 | * be a case where the fresh route has a shorter lifetime than | |
3776 | * the holddown route, so we don't expect the fresh route to | |
3777 | * disappear and complete its holddown time before the existing | |
3778 | * holddown routes time out. Therefore, we won't have a situation | |
3779 | * where we expect the existing holddown routes to be hidden and | |
3780 | * then to reappear sometime later (as holddown routes) in a | |
3781 | * RFP response. | |
3782 | * | |
3783 | * Among other things, this would enable us to skirt the problem | |
3784 | * of local holddown routes that refer to NVE descriptors that | |
3785 | * have already been closed (if the same NVE triggers a subsequent | |
3786 | * rfapi_open(), the new peer is different and doesn't match the | |
3787 | * peer of the holddown route, so the stale holddown route still | |
3788 | * hangs around until it times out instead of just being replaced | |
3789 | * by the fresh route). | |
3790 | */ | |
3791 | /* | |
40381db7 | 3792 | * We know that the new bpi will have been inserted before any routes |
d62a17ae | 3793 | * in holddown, so we can skip any that came before it |
3794 | */ | |
40381db7 | 3795 | for (bpi = info_new->next; bpi; bpi = next) { |
d62a17ae | 3796 | |
3797 | struct prefix pfx_vn; | |
3798 | struct prefix pfx_un; | |
3799 | int un_match = 0; | |
3800 | int remote_peer_match = 0; | |
3801 | ||
40381db7 | 3802 | next = bpi->next; |
d62a17ae | 3803 | |
3804 | /* | |
3805 | * Must be holddown | |
3806 | */ | |
40381db7 | 3807 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) |
d62a17ae | 3808 | continue; |
3809 | ||
3810 | /* | |
3811 | * Must match VN address (nexthop of VPN route) | |
3812 | */ | |
40381db7 | 3813 | if (rfapiGetNexthop(bpi->attr, &pfx_vn)) |
d62a17ae | 3814 | continue; |
3815 | if (!prefix_same(&pfx_vn, &vn_prefix)) | |
3816 | continue; | |
3817 | ||
3818 | if (un_prefix_valid && /* new route UN addr */ | |
40381db7 | 3819 | !rfapiGetUnAddrOfVpnBi(bpi, &pfx_un) |
d62a17ae | 3820 | && /* old route UN addr */ |
3821 | prefix_same(&pfx_un, &un_prefix)) { /* compare */ | |
3822 | un_match = 1; | |
3823 | } | |
40381db7 DS |
3824 | if (!RFAPI_LOCAL_BI(bpi) && !RFAPI_LOCAL_BI(info_new) |
3825 | && sockunion_same(&bpi->peer->su, &info_new->peer->su)) { | |
d62a17ae | 3826 | /* old & new are both remote, same peer */ |
3827 | remote_peer_match = 1; | |
3828 | } | |
3829 | ||
3830 | if (!un_match & !remote_peer_match) | |
3831 | continue; | |
3832 | ||
3833 | vnc_zlog_debug_verbose( | |
40381db7 | 3834 | "%s: removing holddown bpi matching NVE of new route", |
d62a17ae | 3835 | __func__); |
40381db7 | 3836 | if (bpi->extra->vnc.import.timer) { |
d62a17ae | 3837 | struct thread *t = |
40381db7 | 3838 | (struct thread *)bpi->extra->vnc.import.timer; |
d62a17ae | 3839 | struct rfapi_withdraw *wcb = t->arg; |
3840 | ||
3841 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
3842 | thread_cancel(t); | |
3843 | } | |
40381db7 | 3844 | rfapiExpireVpnNow(import_table, rn, bpi, 0); |
d62a17ae | 3845 | } |
3846 | ||
3847 | if (!original_had_routes) { | |
3848 | /* | |
3849 | * We went from 0 usable routes to 1 usable route. Perform the | |
3850 | * "Adding a Route" export process. | |
3851 | */ | |
3852 | vnc_direct_bgp_add_prefix(bgp, import_table, rn); | |
3853 | vnc_zebra_add_prefix(bgp, import_table, rn); | |
3854 | } else { | |
3855 | /* | |
3856 | * Check for nexthop change event | |
3857 | * Note: the prefix_same() test below detects two situations: | |
3858 | * 1. route is replaced, new route has different nexthop | |
3859 | * 2. new route is added (original_nexthop is 0) | |
3860 | */ | |
3861 | struct prefix new_nexthop; | |
3862 | ||
3863 | rfapiGetNexthop(attr, &new_nexthop); | |
3864 | if (!prefix_same(&original_nexthop, &new_nexthop)) { | |
3865 | /* | |
3866 | * nexthop change event | |
3867 | * vnc_direct_bgp_add_prefix() will recompute VN addr | |
3868 | * ecommunity | |
3869 | */ | |
3870 | vnc_direct_bgp_add_prefix(bgp, import_table, rn); | |
3871 | } | |
3872 | } | |
3873 | ||
3874 | if (!(bgp->rfapi_cfg->flags & BGP_VNC_CONFIG_CALLBACK_DISABLE)) { | |
fe08ba7e | 3875 | for (n = rn; n; n = agg_node_parent(n)) { |
d62a17ae | 3876 | // rfapiDoRouteCallback(import_table, n, NULL); |
3877 | } | |
3878 | rfapiMonitorItNodeChanged(import_table, rn, NULL); | |
3879 | } | |
3880 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, 0); | |
3881 | VNC_ITRCCK; | |
65efcfce LB |
3882 | } |
3883 | ||
21cf6b21 VJ |
3884 | static void rfapiBgpInfoFilteredImportBadSafi( |
3885 | struct rfapi_import_table *import_table, int action, struct peer *peer, | |
3886 | void *rfd, /* set for looped back routes */ | |
3887 | struct prefix *p, | |
3888 | struct prefix *aux_prefix, /* AFI_L2VPN: optional IP */ | |
3889 | afi_t afi, struct prefix_rd *prd, | |
9b6d8fcf DS |
3890 | struct attr *attr, /* part of bgp_path_info */ |
3891 | uint8_t type, /* part of bgp_path_info */ | |
3892 | uint8_t sub_type, /* part of bgp_path_info */ | |
3893 | uint32_t *label) /* part of bgp_path_info */ | |
21cf6b21 VJ |
3894 | { |
3895 | vnc_zlog_debug_verbose("%s: Error, bad safi", __func__); | |
3896 | } | |
3897 | ||
65efcfce | 3898 | static rfapi_bi_filtered_import_f * |
d62a17ae | 3899 | rfapiBgpInfoFilteredImportFunction(safi_t safi) |
65efcfce | 3900 | { |
d62a17ae | 3901 | switch (safi) { |
3902 | case SAFI_MPLS_VPN: | |
3903 | return rfapiBgpInfoFilteredImportVPN; | |
3904 | ||
3905 | case SAFI_ENCAP: | |
3906 | return rfapiBgpInfoFilteredImportEncap; | |
5c525538 RW |
3907 | |
3908 | default: | |
3909 | /* not expected */ | |
1c50c1c0 | 3910 | flog_err(EC_LIB_DEVELOPMENT, "%s: bad safi %d", __func__, safi); |
21cf6b21 | 3911 | return rfapiBgpInfoFilteredImportBadSafi; |
d62a17ae | 3912 | } |
65efcfce LB |
3913 | } |
3914 | ||
d62a17ae | 3915 | void rfapiProcessUpdate(struct peer *peer, |
3916 | void *rfd, /* set when looped from RFP/RFAPI */ | |
3917 | struct prefix *p, struct prefix_rd *prd, | |
d7c0a89a QY |
3918 | struct attr *attr, afi_t afi, safi_t safi, uint8_t type, |
3919 | uint8_t sub_type, uint32_t *label) | |
65efcfce | 3920 | { |
d62a17ae | 3921 | struct bgp *bgp; |
3922 | struct rfapi *h; | |
3923 | struct rfapi_import_table *it; | |
3924 | int has_ip_route = 1; | |
3925 | uint32_t lni = 0; | |
3926 | ||
3927 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
3928 | assert(bgp); | |
3929 | ||
3930 | h = bgp->rfapi; | |
3931 | assert(h); | |
3932 | ||
3933 | /* | |
3934 | * look at high-order byte of RD. FF means MAC | |
3935 | * address is present (VNC L2VPN) | |
3936 | */ | |
3937 | if ((safi == SAFI_MPLS_VPN) | |
3938 | && (decode_rd_type(prd->val) == RD_TYPE_VNC_ETH)) { | |
3939 | struct prefix pfx_mac_buf; | |
3940 | struct prefix pfx_nexthop_buf; | |
3941 | int rc; | |
3942 | ||
3943 | /* | |
3944 | * Set flag if prefix and nexthop are the same - don't | |
3945 | * add the route to normal IP-based import tables | |
3946 | */ | |
3947 | if (!rfapiGetNexthop(attr, &pfx_nexthop_buf)) { | |
3948 | if (!prefix_cmp(&pfx_nexthop_buf, p)) { | |
3949 | has_ip_route = 0; | |
3950 | } | |
3951 | } | |
3952 | ||
3953 | memset(&pfx_mac_buf, 0, sizeof(pfx_mac_buf)); | |
3954 | pfx_mac_buf.family = AF_ETHERNET; | |
3955 | pfx_mac_buf.prefixlen = 48; | |
3956 | memcpy(&pfx_mac_buf.u.prefix_eth.octet, prd->val + 2, 6); | |
3957 | ||
3958 | /* | |
3959 | * Find rt containing LNI (Logical Network ID), which | |
3960 | * _should_ always be present when mac address is present | |
3961 | */ | |
3962 | rc = rfapiEcommunityGetLNI(attr->ecommunity, &lni); | |
3963 | ||
3964 | vnc_zlog_debug_verbose( | |
3965 | "%s: rfapiEcommunityGetLNI returned %d, lni=%d, attr=%p", | |
3966 | __func__, rc, lni, attr); | |
8cea9547 | 3967 | if (!rc) { |
d62a17ae | 3968 | it = rfapiMacImportTableGet(bgp, lni); |
3969 | ||
3970 | rfapiBgpInfoFilteredImportVPN( | |
3971 | it, FIF_ACTION_UPDATE, peer, rfd, | |
3972 | &pfx_mac_buf, /* prefix */ | |
3973 | p, /* aux prefix: IP addr */ | |
3974 | AFI_L2VPN, prd, attr, type, sub_type, label); | |
3975 | } | |
3976 | } | |
3977 | ||
3978 | if (!has_ip_route) | |
3979 | return; | |
3980 | ||
3981 | /* | |
3982 | * Iterate over all import tables; do a filtered import | |
3983 | * for the afi/safi combination | |
3984 | */ | |
3985 | for (it = h->imports; it; it = it->next) { | |
3986 | (*rfapiBgpInfoFilteredImportFunction(safi))( | |
3987 | it, FIF_ACTION_UPDATE, peer, rfd, p, /* prefix */ | |
3988 | NULL, afi, prd, attr, type, sub_type, label); | |
3989 | } | |
3990 | ||
3991 | if (safi == SAFI_MPLS_VPN) { | |
3992 | vnc_direct_bgp_rh_add_route(bgp, afi, p, peer, attr); | |
d62a17ae | 3993 | rfapiBgpInfoFilteredImportVPN( |
3994 | bgp->rfapi->it_ce, FIF_ACTION_UPDATE, peer, rfd, | |
3995 | p, /* prefix */ | |
3996 | NULL, afi, prd, attr, type, sub_type, label); | |
3997 | } | |
65efcfce LB |
3998 | } |
3999 | ||
4000 | ||
d62a17ae | 4001 | void rfapiProcessWithdraw(struct peer *peer, void *rfd, struct prefix *p, |
4002 | struct prefix_rd *prd, struct attr *attr, afi_t afi, | |
d7c0a89a | 4003 | safi_t safi, uint8_t type, int kill) |
65efcfce | 4004 | { |
d62a17ae | 4005 | struct bgp *bgp; |
4006 | struct rfapi *h; | |
4007 | struct rfapi_import_table *it; | |
4008 | ||
4009 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
4010 | assert(bgp); | |
4011 | ||
4012 | h = bgp->rfapi; | |
4013 | assert(h); | |
4014 | ||
4015 | /* | |
4016 | * look at high-order byte of RD. FF means MAC | |
4017 | * address is present (VNC L2VPN) | |
4018 | */ | |
4019 | if (h->import_mac != NULL && safi == SAFI_MPLS_VPN | |
4020 | && decode_rd_type(prd->val) == RD_TYPE_VNC_ETH) { | |
4021 | struct prefix pfx_mac_buf; | |
4022 | void *cursor = NULL; | |
4023 | int rc; | |
4024 | ||
4025 | memset(&pfx_mac_buf, 0, sizeof(pfx_mac_buf)); | |
4026 | pfx_mac_buf.family = AF_ETHERNET; | |
4027 | pfx_mac_buf.prefixlen = 48; | |
4028 | memcpy(&pfx_mac_buf.u.prefix_eth, prd->val + 2, 6); | |
4029 | ||
4030 | /* | |
4031 | * withdraw does not contain attrs, so we don't have | |
4032 | * access to the route's LNI, which would ordinarily | |
4033 | * select the specific mac-based import table. Instead, | |
4034 | * we must iterate over all mac-based tables and rely | |
4035 | * on the RD to match. | |
4036 | * | |
4037 | * If this approach is too slow, add an index where | |
4038 | * key is {RD, peer} and value is the import table | |
4039 | */ | |
4040 | for (rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4041 | &cursor); | |
4042 | rc == 0; rc = skiplist_next(h->import_mac, NULL, | |
4043 | (void **)&it, &cursor)) { | |
65efcfce LB |
4044 | |
4045 | #if DEBUG_L2_EXTRA | |
d62a17ae | 4046 | vnc_zlog_debug_verbose( |
4047 | "%s: calling rfapiBgpInfoFilteredImportVPN(it=%p, afi=AFI_L2VPN)", | |
4048 | __func__, it); | |
65efcfce LB |
4049 | #endif |
4050 | ||
d62a17ae | 4051 | rfapiBgpInfoFilteredImportVPN( |
4052 | it, | |
4053 | (kill ? FIF_ACTION_KILL : FIF_ACTION_WITHDRAW), | |
4054 | peer, rfd, &pfx_mac_buf, /* prefix */ | |
4055 | p, /* aux_prefix: IP */ | |
4056 | AFI_L2VPN, prd, attr, type, 0, | |
4057 | NULL); /* sub_type & label unused for withdraw | |
9d303b37 | 4058 | */ |
d62a17ae | 4059 | } |
4060 | } | |
4061 | ||
4062 | /* | |
4063 | * XXX For the case where the withdraw involves an L2 | |
4064 | * route with no IP information, we rely on the lack | |
4065 | * of RT-list intersection to filter out the withdraw | |
4066 | * from the IP-based import tables below | |
4067 | */ | |
4068 | ||
4069 | /* | |
4070 | * Iterate over all import tables; do a filtered import | |
4071 | * for the afi/safi combination | |
4072 | */ | |
4073 | ||
4074 | for (it = h->imports; it; it = it->next) { | |
4075 | (*rfapiBgpInfoFilteredImportFunction(safi))( | |
4076 | it, (kill ? FIF_ACTION_KILL : FIF_ACTION_WITHDRAW), | |
4077 | peer, rfd, p, /* prefix */ | |
4078 | NULL, afi, prd, attr, type, 0, | |
4079 | NULL); /* sub_type & label unused for withdraw */ | |
4080 | } | |
4081 | ||
4082 | /* TBD the deletion should happen after the lifetime expires */ | |
4083 | if (safi == SAFI_MPLS_VPN) | |
4084 | vnc_direct_bgp_rh_del_route(bgp, afi, p, peer); | |
4085 | ||
4086 | if (safi == SAFI_MPLS_VPN) { | |
4087 | rfapiBgpInfoFilteredImportVPN( | |
4088 | bgp->rfapi->it_ce, | |
4089 | (kill ? FIF_ACTION_KILL : FIF_ACTION_WITHDRAW), peer, | |
4090 | rfd, p, /* prefix */ | |
4091 | NULL, afi, prd, attr, type, 0, | |
4092 | NULL); /* sub_type & label unused for withdraw */ | |
4093 | } | |
65efcfce LB |
4094 | } |
4095 | ||
4096 | /* | |
4097 | * TBD optimized withdraw timer algorithm for case of many | |
4098 | * routes expiring at the same time due to peer drop. | |
4099 | */ | |
4100 | /* | |
40381db7 | 4101 | * 1. Visit all BPIs in all ENCAP import tables. |
65efcfce | 4102 | * |
40381db7 DS |
4103 | * a. If a bpi's peer is the failed peer, remove the bpi. |
4104 | * b. If the removed ENCAP bpi was first in the list of | |
4105 | * BPIs at this ENCAP node, loop over all monitors | |
65efcfce LB |
4106 | * at this node: |
4107 | * | |
4108 | * (1) for each ENCAP monitor, loop over all its | |
4109 | * VPN node monitors and set their RFAPI_MON_FLAG_NEEDCALLBACK | |
4110 | * flags. | |
4111 | * | |
40381db7 DS |
4112 | * 2. Visit all BPIs in all VPN import tables. |
4113 | * a. If a bpi's peer is the failed peer, remove the bpi. | |
65efcfce LB |
4114 | * b. loop over all the VPN node monitors and set their |
4115 | * RFAPI_MON_FLAG_NEEDCALLBACK flags | |
40381db7 | 4116 | * c. If there are no BPIs left at this VPN node, |
65efcfce LB |
4117 | * |
4118 | */ | |
4119 | ||
4120 | ||
4121 | /* surprise, this gets called from peer_delete(), from rfapi_close() */ | |
d62a17ae | 4122 | static void rfapiProcessPeerDownRt(struct peer *peer, |
4123 | struct rfapi_import_table *import_table, | |
4124 | afi_t afi, safi_t safi) | |
65efcfce | 4125 | { |
fe08ba7e | 4126 | struct agg_node *rn; |
40381db7 | 4127 | struct bgp_path_info *bpi; |
fe08ba7e | 4128 | struct agg_table *rt; |
d62a17ae | 4129 | int (*timer_service_func)(struct thread *); |
4130 | ||
4131 | assert(afi == AFI_IP || afi == AFI_IP6); | |
4132 | ||
4133 | VNC_ITRCCK; | |
4134 | ||
4135 | switch (safi) { | |
4136 | case SAFI_MPLS_VPN: | |
4137 | rt = import_table->imported_vpn[afi]; | |
4138 | timer_service_func = rfapiWithdrawTimerVPN; | |
4139 | break; | |
4140 | case SAFI_ENCAP: | |
4141 | rt = import_table->imported_encap[afi]; | |
4142 | timer_service_func = rfapiWithdrawTimerEncap; | |
4143 | break; | |
4144 | default: | |
4145 | assert(0); | |
4146 | } | |
4147 | ||
4148 | ||
fe08ba7e | 4149 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
40381db7 DS |
4150 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
4151 | if (bpi->peer == peer) { | |
d62a17ae | 4152 | |
40381db7 | 4153 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
d62a17ae | 4154 | /* already in holddown, skip */ |
4155 | continue; | |
4156 | } | |
4157 | ||
4158 | if (safi == SAFI_MPLS_VPN) { | |
4159 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 4160 | bpi, import_table, afi, -1); |
d62a17ae | 4161 | import_table->holddown_count[afi] += 1; |
4162 | } | |
40381db7 | 4163 | rfapiBiStartWithdrawTimer(import_table, rn, bpi, |
d62a17ae | 4164 | afi, safi, |
4165 | timer_service_func); | |
4166 | } | |
4167 | } | |
4168 | } | |
4169 | VNC_ITRCCK; | |
65efcfce LB |
4170 | } |
4171 | ||
d62a17ae | 4172 | /* |
65efcfce LB |
4173 | * This gets called when a peer connection drops. We have to remove |
4174 | * all the routes from this peer. | |
4175 | * | |
4176 | * Current approach is crude. TBD Optimize by setting fewer timers and | |
4177 | * grouping withdrawn routes so we can generate callbacks more | |
4178 | * efficiently. | |
4179 | */ | |
d62a17ae | 4180 | void rfapiProcessPeerDown(struct peer *peer) |
65efcfce | 4181 | { |
d62a17ae | 4182 | struct bgp *bgp; |
4183 | struct rfapi *h; | |
4184 | struct rfapi_import_table *it; | |
4185 | ||
4186 | /* | |
4187 | * If this peer is a "dummy" peer structure atached to a RFAPI | |
4188 | * nve_descriptor, we don't need to walk the import tables | |
4189 | * because the routes are already withdrawn by rfapi_close() | |
4190 | */ | |
4191 | if (CHECK_FLAG(peer->flags, PEER_FLAG_IS_RFAPI_HD)) | |
4192 | return; | |
4193 | ||
4194 | /* | |
40381db7 DS |
4195 | * 1. Visit all BPIs in all ENCAP import tables. |
4196 | * Start withdraw timer on the BPIs that match peer. | |
d62a17ae | 4197 | * |
40381db7 DS |
4198 | * 2. Visit All BPIs in all VPN import tables. |
4199 | * Start withdraw timer on the BPIs that match peer. | |
d62a17ae | 4200 | */ |
4201 | ||
4202 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
4203 | if (!bgp) | |
4204 | return; | |
4205 | ||
4206 | h = bgp->rfapi; | |
4207 | assert(h); | |
4208 | ||
4209 | for (it = h->imports; it; it = it->next) { | |
4210 | rfapiProcessPeerDownRt(peer, it, AFI_IP, SAFI_ENCAP); | |
4211 | rfapiProcessPeerDownRt(peer, it, AFI_IP6, SAFI_ENCAP); | |
4212 | rfapiProcessPeerDownRt(peer, it, AFI_IP, SAFI_MPLS_VPN); | |
4213 | rfapiProcessPeerDownRt(peer, it, AFI_IP6, SAFI_MPLS_VPN); | |
4214 | } | |
4215 | ||
4216 | if (h->it_ce) { | |
4217 | rfapiProcessPeerDownRt(peer, h->it_ce, AFI_IP, SAFI_MPLS_VPN); | |
4218 | rfapiProcessPeerDownRt(peer, h->it_ce, AFI_IP6, SAFI_MPLS_VPN); | |
4219 | } | |
65efcfce LB |
4220 | } |
4221 | ||
4222 | /* | |
4223 | * Import an entire RIB (for an afi/safi) to an import table RIB, | |
4224 | * filtered according to the import table's RT list | |
4225 | * | |
4226 | * TBD: does this function need additions to match rfapiProcessUpdate() | |
d62a17ae | 4227 | * for, e.g., L2 handling? |
65efcfce | 4228 | */ |
d62a17ae | 4229 | static void rfapiBgpTableFilteredImport(struct bgp *bgp, |
4230 | struct rfapi_import_table *it, | |
4231 | afi_t afi, safi_t safi) | |
65efcfce | 4232 | { |
d62a17ae | 4233 | struct bgp_node *rn1; |
4234 | struct bgp_node *rn2; | |
4235 | ||
4236 | /* Only these SAFIs have 2-level RIBS */ | |
4237 | assert(safi == SAFI_MPLS_VPN || safi == SAFI_ENCAP); | |
4238 | ||
4239 | /* | |
4240 | * Now visit all the rd nodes and the nodes of all the | |
4241 | * route tables attached to them, and import the routes | |
4242 | * if they have matching route targets | |
4243 | */ | |
4244 | for (rn1 = bgp_table_top(bgp->rib[afi][safi]); rn1; | |
4245 | rn1 = bgp_route_next(rn1)) { | |
4246 | ||
4247 | if (rn1->info) { | |
4248 | for (rn2 = bgp_table_top(rn1->info); rn2; | |
4249 | rn2 = bgp_route_next(rn2)) { | |
4250 | ||
40381db7 | 4251 | struct bgp_path_info *bpi; |
d62a17ae | 4252 | |
40381db7 | 4253 | for (bpi = rn2->info; bpi; bpi = bpi->next) { |
d7c0a89a | 4254 | uint32_t label = 0; |
d62a17ae | 4255 | |
40381db7 | 4256 | if (CHECK_FLAG(bpi->flags, |
1defdda8 | 4257 | BGP_PATH_REMOVED)) |
d62a17ae | 4258 | continue; |
4259 | ||
40381db7 | 4260 | if (bpi->extra) |
d62a17ae | 4261 | label = decode_label( |
40381db7 | 4262 | &bpi->extra->label[0]); |
d62a17ae | 4263 | (*rfapiBgpInfoFilteredImportFunction( |
4264 | safi))( | |
4265 | it, /* which import table */ | |
40381db7 | 4266 | FIF_ACTION_UPDATE, bpi->peer, |
d62a17ae | 4267 | NULL, &rn2->p, /* prefix */ |
4268 | NULL, afi, | |
4269 | (struct prefix_rd *)&rn1->p, | |
40381db7 DS |
4270 | bpi->attr, bpi->type, |
4271 | bpi->sub_type, &label); | |
d62a17ae | 4272 | } |
4273 | } | |
4274 | } | |
4275 | } | |
65efcfce LB |
4276 | } |
4277 | ||
4278 | ||
4279 | /* per-bgp-instance rfapi data */ | |
d62a17ae | 4280 | struct rfapi *bgp_rfapi_new(struct bgp *bgp) |
65efcfce | 4281 | { |
d62a17ae | 4282 | struct rfapi *h; |
e7038dde | 4283 | afi_t afi; |
d62a17ae | 4284 | struct rfapi_rfp_cfg *cfg = NULL; |
4285 | struct rfapi_rfp_cb_methods *cbm = NULL; | |
4286 | ||
4287 | assert(bgp->rfapi_cfg == NULL); | |
4288 | ||
4289 | h = (struct rfapi *)XCALLOC(MTYPE_RFAPI, sizeof(struct rfapi)); | |
4290 | ||
4291 | for (afi = AFI_IP; afi < AFI_MAX; afi++) { | |
fe08ba7e | 4292 | h->un[afi] = agg_table_init(); |
d62a17ae | 4293 | } |
4294 | ||
4295 | /* | |
4296 | * initialize the ce import table | |
4297 | */ | |
4298 | h->it_ce = XCALLOC(MTYPE_RFAPI_IMPORTTABLE, | |
4299 | sizeof(struct rfapi_import_table)); | |
fe08ba7e DS |
4300 | h->it_ce->imported_vpn[AFI_IP] = agg_table_init(); |
4301 | h->it_ce->imported_vpn[AFI_IP6] = agg_table_init(); | |
4302 | h->it_ce->imported_encap[AFI_IP] = agg_table_init(); | |
4303 | h->it_ce->imported_encap[AFI_IP6] = agg_table_init(); | |
d62a17ae | 4304 | rfapiBgpTableFilteredImport(bgp, h->it_ce, AFI_IP, SAFI_MPLS_VPN); |
4305 | rfapiBgpTableFilteredImport(bgp, h->it_ce, AFI_IP6, SAFI_MPLS_VPN); | |
4306 | ||
4307 | /* | |
4308 | * Set up work queue for deferred rfapi_close operations | |
4309 | */ | |
4310 | h->deferred_close_q = | |
4311 | work_queue_new(bm->master, "rfapi deferred close"); | |
4312 | h->deferred_close_q->spec.workfunc = rfapi_deferred_close_workfunc; | |
4313 | h->deferred_close_q->spec.data = h; | |
4314 | ||
4315 | h->rfp = rfp_start(bm->master, &cfg, &cbm); | |
4316 | bgp->rfapi_cfg = bgp_rfapi_cfg_new(cfg); | |
4317 | if (cbm != NULL) { | |
4318 | h->rfp_methods = *cbm; | |
4319 | } | |
4320 | return h; | |
65efcfce LB |
4321 | } |
4322 | ||
d62a17ae | 4323 | void bgp_rfapi_destroy(struct bgp *bgp, struct rfapi *h) |
65efcfce | 4324 | { |
e7038dde | 4325 | afi_t afi; |
0ae6124f | 4326 | |
d62a17ae | 4327 | if (bgp == NULL || h == NULL) |
4328 | return; | |
4329 | ||
4330 | if (h->resolve_nve_nexthop) { | |
4331 | skiplist_free(h->resolve_nve_nexthop); | |
4332 | h->resolve_nve_nexthop = NULL; | |
4333 | } | |
4334 | ||
fe08ba7e DS |
4335 | agg_table_finish(h->it_ce->imported_vpn[AFI_IP]); |
4336 | agg_table_finish(h->it_ce->imported_vpn[AFI_IP6]); | |
4337 | agg_table_finish(h->it_ce->imported_encap[AFI_IP]); | |
4338 | agg_table_finish(h->it_ce->imported_encap[AFI_IP6]); | |
d62a17ae | 4339 | |
4340 | if (h->import_mac) { | |
4341 | struct rfapi_import_table *it; | |
4342 | void *cursor; | |
4343 | int rc; | |
4344 | ||
9d303b37 DL |
4345 | for (cursor = NULL, |
4346 | rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4347 | &cursor); | |
d62a17ae | 4348 | !rc; rc = skiplist_next(h->import_mac, NULL, (void **)&it, |
4349 | &cursor)) { | |
4350 | ||
4351 | rfapiImportTableFlush(it); | |
4352 | XFREE(MTYPE_RFAPI_IMPORTTABLE, it); | |
4353 | } | |
4354 | skiplist_free(h->import_mac); | |
4355 | h->import_mac = NULL; | |
4356 | } | |
4357 | ||
e208c8f9 | 4358 | work_queue_free_and_null(&h->deferred_close_q); |
d62a17ae | 4359 | |
4360 | if (h->rfp != NULL) | |
4361 | rfp_stop(h->rfp); | |
0ae6124f LB |
4362 | |
4363 | for (afi = AFI_IP; afi < AFI_MAX; afi++) { | |
fe08ba7e | 4364 | agg_table_finish(h->un[afi]); |
0ae6124f LB |
4365 | } |
4366 | ||
d62a17ae | 4367 | XFREE(MTYPE_RFAPI_IMPORTTABLE, h->it_ce); |
4368 | XFREE(MTYPE_RFAPI, h); | |
65efcfce LB |
4369 | } |
4370 | ||
4371 | struct rfapi_import_table * | |
d62a17ae | 4372 | rfapiImportTableRefAdd(struct bgp *bgp, struct ecommunity *rt_import_list, |
4373 | struct rfapi_nve_group_cfg *rfg) | |
65efcfce | 4374 | { |
d62a17ae | 4375 | struct rfapi *h; |
4376 | struct rfapi_import_table *it; | |
4377 | afi_t afi; | |
4378 | ||
4379 | h = bgp->rfapi; | |
4380 | assert(h); | |
4381 | ||
4382 | for (it = h->imports; it; it = it->next) { | |
4383 | if (ecommunity_cmp(it->rt_import_list, rt_import_list)) | |
4384 | break; | |
4385 | } | |
4386 | ||
4387 | vnc_zlog_debug_verbose("%s: matched it=%p", __func__, it); | |
4388 | ||
4389 | if (!it) { | |
4390 | it = XCALLOC(MTYPE_RFAPI_IMPORTTABLE, | |
4391 | sizeof(struct rfapi_import_table)); | |
4392 | assert(it); | |
4393 | it->next = h->imports; | |
4394 | h->imports = it; | |
4395 | ||
4396 | it->rt_import_list = ecommunity_dup(rt_import_list); | |
4397 | it->rfg = rfg; | |
4398 | it->monitor_exterior_orphans = | |
4399 | skiplist_new(0, NULL, (void (*)(void *))prefix_free); | |
4400 | ||
4401 | /* | |
4402 | * fill import route tables from RIBs | |
4403 | * | |
4404 | * Potential area for optimization. If this occurs when | |
4405 | * tables are large (e.g., the operator adds a nve group | |
4406 | * with a new RT list to a running system), it could take | |
4407 | * a while. | |
4408 | * | |
4409 | */ | |
4410 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
4411 | ||
fe08ba7e DS |
4412 | it->imported_vpn[afi] = agg_table_init(); |
4413 | it->imported_encap[afi] = agg_table_init(); | |
d62a17ae | 4414 | |
4415 | rfapiBgpTableFilteredImport(bgp, it, afi, | |
4416 | SAFI_MPLS_VPN); | |
4417 | rfapiBgpTableFilteredImport(bgp, it, afi, SAFI_ENCAP); | |
4418 | ||
4419 | vnc_import_bgp_exterior_redist_enable_it(bgp, afi, it); | |
4420 | } | |
4421 | } | |
4422 | ||
4423 | it->refcount += 1; | |
4424 | ||
4425 | return it; | |
65efcfce LB |
4426 | } |
4427 | ||
4428 | /* | |
4429 | * skiplist element free function | |
4430 | */ | |
d62a17ae | 4431 | static void delete_rem_pfx_na_free(void *na) |
65efcfce | 4432 | { |
d62a17ae | 4433 | uint32_t *pCounter = ((struct rfapi_nve_addr *)na)->info; |
65efcfce | 4434 | |
d62a17ae | 4435 | *pCounter += 1; |
4436 | XFREE(MTYPE_RFAPI_NVE_ADDR, na); | |
65efcfce LB |
4437 | } |
4438 | ||
4439 | /* | |
4440 | * Common deleter for IP and MAC import tables | |
4441 | */ | |
d62a17ae | 4442 | static void rfapiDeleteRemotePrefixesIt( |
4443 | struct bgp *bgp, struct rfapi_import_table *it, struct prefix *un, | |
4444 | struct prefix *vn, struct prefix *p, int delete_active, | |
4445 | int delete_holddown, uint32_t *pARcount, uint32_t *pAHcount, | |
4446 | uint32_t *pHRcount, uint32_t *pHHcount, | |
4447 | struct skiplist *uniq_active_nves, struct skiplist *uniq_holddown_nves) | |
65efcfce | 4448 | { |
d62a17ae | 4449 | afi_t afi; |
65efcfce LB |
4450 | |
4451 | #if DEBUG_L2_EXTRA | |
d62a17ae | 4452 | { |
872ed4c7 | 4453 | char buf_pfx[PREFIX_STRLEN]; |
d62a17ae | 4454 | |
4455 | if (p) { | |
872ed4c7 | 4456 | prefix2str(p, buf_pfx, sizeof(buf_pfx)); |
d62a17ae | 4457 | } else { |
4458 | buf_pfx[0] = '*'; | |
4459 | buf_pfx[1] = 0; | |
4460 | } | |
4461 | ||
4462 | vnc_zlog_debug_verbose( | |
4463 | "%s: entry, p=%s, delete_active=%d, delete_holddown=%d", | |
4464 | __func__, buf_pfx, delete_active, delete_holddown); | |
4465 | } | |
65efcfce LB |
4466 | #endif |
4467 | ||
d62a17ae | 4468 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { |
4469 | ||
fe08ba7e DS |
4470 | struct agg_table *rt; |
4471 | struct agg_node *rn; | |
d62a17ae | 4472 | |
4473 | if (p && (family2afi(p->family) != afi)) { | |
4474 | continue; | |
4475 | } | |
4476 | ||
4477 | rt = it->imported_vpn[afi]; | |
4478 | if (!rt) | |
4479 | continue; | |
4480 | ||
4481 | vnc_zlog_debug_verbose("%s: scanning rt for afi=%d", __func__, | |
4482 | afi); | |
4483 | ||
fe08ba7e | 4484 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
40381db7 | 4485 | struct bgp_path_info *bpi; |
4b7e6066 | 4486 | struct bgp_path_info *next; |
d62a17ae | 4487 | |
8a005002 | 4488 | if (p && VNC_DEBUG(IMPORT_DEL_REMOTE)) { |
872ed4c7 DS |
4489 | char p1line[PREFIX_STRLEN]; |
4490 | char p2line[PREFIX_STRLEN]; | |
d62a17ae | 4491 | |
872ed4c7 DS |
4492 | prefix2str(p, p1line, sizeof(p1line)); |
4493 | prefix2str(&rn->p, p2line, sizeof(p2line)); | |
d62a17ae | 4494 | vnc_zlog_debug_any("%s: want %s, have %s", |
4495 | __func__, p1line, p2line); | |
4496 | } | |
4497 | ||
4498 | if (p && prefix_cmp(p, &rn->p)) | |
4499 | continue; | |
4500 | ||
4501 | { | |
872ed4c7 DS |
4502 | char buf_pfx[PREFIX_STRLEN]; |
4503 | ||
4504 | prefix2str(&rn->p, buf_pfx, sizeof(buf_pfx)); | |
d62a17ae | 4505 | vnc_zlog_debug_verbose("%s: rn pfx=%s", |
4506 | __func__, buf_pfx); | |
4507 | } | |
4508 | ||
4509 | /* TBD is this valid for afi == AFI_L2VPN? */ | |
4510 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, 1); | |
4511 | ||
40381db7 DS |
4512 | for (bpi = rn->info; bpi; bpi = next) { |
4513 | next = bpi->next; | |
d62a17ae | 4514 | |
4515 | struct prefix qpt; | |
4516 | struct prefix qct; | |
4517 | int qpt_valid = 0; | |
4518 | int qct_valid = 0; | |
4519 | int is_active = 0; | |
4520 | ||
40381db7 DS |
4521 | vnc_zlog_debug_verbose("%s: examining bpi %p", |
4522 | __func__, bpi); | |
d62a17ae | 4523 | |
40381db7 DS |
4524 | if (bpi->attr) { |
4525 | if (!rfapiGetNexthop(bpi->attr, &qpt)) | |
d62a17ae | 4526 | qpt_valid = 1; |
4527 | } | |
4528 | if (vn) { | |
4529 | if (!qpt_valid | |
4530 | || !prefix_match(vn, &qpt)) { | |
65efcfce | 4531 | #if DEBUG_L2_EXTRA |
d62a17ae | 4532 | vnc_zlog_debug_verbose( |
4533 | "%s: continue at vn && !qpt_valid || !prefix_match(vn, &qpt)", | |
4534 | __func__); | |
65efcfce | 4535 | #endif |
d62a17ae | 4536 | continue; |
4537 | } | |
4538 | } | |
65efcfce | 4539 | |
40381db7 | 4540 | if (!rfapiGetUnAddrOfVpnBi(bpi, &qct)) |
d62a17ae | 4541 | qct_valid = 1; |
65efcfce | 4542 | |
d62a17ae | 4543 | if (un) { |
4544 | if (!qct_valid | |
4545 | || !prefix_match(un, &qct)) { | |
65efcfce | 4546 | #if DEBUG_L2_EXTRA |
d62a17ae | 4547 | vnc_zlog_debug_verbose( |
4548 | "%s: continue at un && !qct_valid || !prefix_match(un, &qct)", | |
4549 | __func__); | |
65efcfce | 4550 | #endif |
d62a17ae | 4551 | continue; |
4552 | } | |
4553 | } | |
4554 | ||
4555 | ||
4556 | /* | |
40381db7 | 4557 | * Blow bpi away |
d62a17ae | 4558 | */ |
4559 | /* | |
4560 | * If this route is waiting to be deleted | |
4561 | * because of | |
4562 | * a previous withdraw, we must cancel its | |
4563 | * timer. | |
4564 | */ | |
40381db7 | 4565 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
d62a17ae | 4566 | if (!delete_holddown) |
4567 | continue; | |
40381db7 | 4568 | if (bpi->extra->vnc.import.timer) { |
d62a17ae | 4569 | |
4570 | struct thread *t = | |
40381db7 | 4571 | (struct thread *)bpi |
d62a17ae | 4572 | ->extra->vnc |
4573 | .import.timer; | |
4574 | struct rfapi_withdraw *wcb = | |
4575 | t->arg; | |
4576 | ||
4577 | wcb->import_table | |
4578 | ->holddown_count[afi] -= | |
4579 | 1; | |
4580 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 4581 | bpi, wcb->import_table, |
d62a17ae | 4582 | afi, 1); |
4583 | XFREE(MTYPE_RFAPI_WITHDRAW, | |
4584 | wcb); | |
4585 | thread_cancel(t); | |
4586 | } | |
4587 | } else { | |
4588 | if (!delete_active) | |
4589 | continue; | |
4590 | is_active = 1; | |
4591 | } | |
4592 | ||
4593 | vnc_zlog_debug_verbose( | |
40381db7 DS |
4594 | "%s: deleting bpi %p (qct_valid=%d, qpt_valid=%d, delete_holddown=%d, delete_active=%d)", |
4595 | __func__, bpi, qct_valid, qpt_valid, | |
d62a17ae | 4596 | delete_holddown, delete_active); |
4597 | ||
4598 | ||
4599 | /* | |
4600 | * add nve to list | |
4601 | */ | |
4602 | if (qct_valid && qpt_valid) { | |
4603 | ||
4604 | struct rfapi_nve_addr na; | |
4605 | struct rfapi_nve_addr *nap; | |
4606 | ||
4607 | memset(&na, 0, sizeof(na)); | |
4608 | assert(!rfapiQprefix2Raddr(&qct, | |
4609 | &na.un)); | |
4610 | assert(!rfapiQprefix2Raddr(&qpt, | |
4611 | &na.vn)); | |
4612 | ||
4613 | if (skiplist_search( | |
4614 | (is_active | |
4615 | ? uniq_active_nves | |
4616 | : uniq_holddown_nves), | |
4617 | &na, (void **)&nap)) { | |
4618 | char line[BUFSIZ]; | |
4619 | ||
4620 | nap = XCALLOC( | |
4621 | MTYPE_RFAPI_NVE_ADDR, | |
4622 | sizeof(struct | |
4623 | rfapi_nve_addr)); | |
4624 | assert(nap); | |
4625 | *nap = na; | |
4626 | nap->info = is_active | |
4627 | ? pAHcount | |
4628 | : pHHcount; | |
4629 | skiplist_insert( | |
4630 | (is_active | |
4631 | ? uniq_active_nves | |
4632 | : uniq_holddown_nves), | |
4633 | nap, nap); | |
4634 | ||
4635 | rfapiNveAddr2Str(nap, line, | |
4636 | BUFSIZ); | |
4637 | } | |
4638 | } | |
4639 | ||
4640 | vnc_direct_bgp_rh_del_route(bgp, afi, &rn->p, | |
40381db7 | 4641 | bpi->peer); |
d62a17ae | 4642 | |
40381db7 | 4643 | RFAPI_UPDATE_ITABLE_COUNT(bpi, it, afi, -1); |
d62a17ae | 4644 | it->holddown_count[afi] += 1; |
40381db7 | 4645 | rfapiExpireVpnNow(it, rn, bpi, 1); |
d62a17ae | 4646 | |
4647 | vnc_zlog_debug_verbose( | |
4648 | "%s: incrementing count (is_active=%d)", | |
4649 | __func__, is_active); | |
4650 | ||
4651 | if (is_active) | |
4652 | ++*pARcount; | |
4653 | else | |
4654 | ++*pHRcount; | |
4655 | } | |
4656 | } | |
4657 | } | |
65efcfce LB |
4658 | } |
4659 | ||
4660 | ||
4661 | /* | |
4662 | * For use by the "clear vnc prefixes" command | |
4663 | */ | |
4664 | /*------------------------------------------ | |
4665 | * rfapiDeleteRemotePrefixes | |
4666 | * | |
4667 | * UI helper: For use by the "clear vnc prefixes" command | |
4668 | * | |
d62a17ae | 4669 | * input: |
65efcfce LB |
4670 | * un if set, tunnel must match this prefix |
4671 | * vn if set, nexthop prefix must match this prefix | |
4672 | * p if set, prefix must match this prefix | |
5ff06872 | 4673 | * it if set, only look in this import table |
65efcfce LB |
4674 | * |
4675 | * output | |
4676 | * pARcount number of active routes deleted | |
4677 | * pAHcount number of active nves deleted | |
4678 | * pHRcount number of holddown routes deleted | |
4679 | * pHHcount number of holddown nves deleted | |
4680 | * | |
4681 | * return value: | |
4682 | * void | |
4683 | --------------------------------------------*/ | |
d62a17ae | 4684 | void rfapiDeleteRemotePrefixes(struct prefix *un, struct prefix *vn, |
4685 | struct prefix *p, | |
4686 | struct rfapi_import_table *arg_it, | |
4687 | int delete_active, int delete_holddown, | |
4688 | uint32_t *pARcount, uint32_t *pAHcount, | |
4689 | uint32_t *pHRcount, uint32_t *pHHcount) | |
65efcfce | 4690 | { |
d62a17ae | 4691 | struct bgp *bgp; |
4692 | struct rfapi *h; | |
4693 | struct rfapi_import_table *it; | |
4694 | uint32_t deleted_holddown_route_count = 0; | |
4695 | uint32_t deleted_active_route_count = 0; | |
4696 | uint32_t deleted_holddown_nve_count = 0; | |
4697 | uint32_t deleted_active_nve_count = 0; | |
4698 | struct skiplist *uniq_holddown_nves; | |
4699 | struct skiplist *uniq_active_nves; | |
4700 | ||
4701 | VNC_ITRCCK; | |
4702 | ||
4703 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
4704 | /* If no bgp instantiated yet, no vnc prefixes exist */ | |
4705 | if (!bgp) | |
4706 | return; | |
4707 | ||
4708 | h = bgp->rfapi; | |
4709 | assert(h); | |
4710 | ||
4711 | uniq_holddown_nves = | |
4712 | skiplist_new(0, rfapi_nve_addr_cmp, delete_rem_pfx_na_free); | |
4713 | uniq_active_nves = | |
4714 | skiplist_new(0, rfapi_nve_addr_cmp, delete_rem_pfx_na_free); | |
4715 | ||
4716 | /* | |
4717 | * Iterate over all import tables; do a filtered import | |
4718 | * for the afi/safi combination | |
4719 | */ | |
4720 | ||
4721 | if (arg_it) | |
4722 | it = arg_it; | |
4723 | else | |
4724 | it = h->imports; | |
4725 | for (; it;) { | |
4726 | ||
4727 | vnc_zlog_debug_verbose( | |
4728 | "%s: calling rfapiDeleteRemotePrefixesIt() on (IP) import %p", | |
4729 | __func__, it); | |
4730 | ||
4731 | rfapiDeleteRemotePrefixesIt( | |
4732 | bgp, it, un, vn, p, delete_active, delete_holddown, | |
4733 | &deleted_active_route_count, &deleted_active_nve_count, | |
4734 | &deleted_holddown_route_count, | |
4735 | &deleted_holddown_nve_count, uniq_active_nves, | |
4736 | uniq_holddown_nves); | |
4737 | ||
4738 | if (arg_it) | |
4739 | it = NULL; | |
4740 | else | |
4741 | it = it->next; | |
4742 | } | |
4743 | ||
4744 | /* | |
4745 | * Now iterate over L2 import tables | |
4746 | */ | |
4747 | if (h->import_mac && !(p && (p->family != AF_ETHERNET))) { | |
4748 | ||
4749 | void *cursor = NULL; | |
4750 | int rc; | |
4751 | ||
9d303b37 DL |
4752 | for (cursor = NULL, |
4753 | rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4754 | &cursor); | |
d62a17ae | 4755 | !rc; rc = skiplist_next(h->import_mac, NULL, (void **)&it, |
4756 | &cursor)) { | |
4757 | ||
4758 | vnc_zlog_debug_verbose( | |
4759 | "%s: calling rfapiDeleteRemotePrefixesIt() on import_mac %p", | |
4760 | __func__, it); | |
4761 | ||
4762 | rfapiDeleteRemotePrefixesIt( | |
4763 | bgp, it, un, vn, p, delete_active, | |
4764 | delete_holddown, &deleted_active_route_count, | |
4765 | &deleted_active_nve_count, | |
4766 | &deleted_holddown_route_count, | |
4767 | &deleted_holddown_nve_count, uniq_active_nves, | |
4768 | uniq_holddown_nves); | |
4769 | } | |
4770 | } | |
4771 | ||
4772 | /* | |
4773 | * our custom element freeing function above counts as it deletes | |
4774 | */ | |
4775 | skiplist_free(uniq_holddown_nves); | |
4776 | skiplist_free(uniq_active_nves); | |
4777 | ||
4778 | if (pARcount) | |
4779 | *pARcount = deleted_active_route_count; | |
4780 | if (pAHcount) | |
4781 | *pAHcount = deleted_active_nve_count; | |
4782 | if (pHRcount) | |
4783 | *pHRcount = deleted_holddown_route_count; | |
4784 | if (pHHcount) | |
4785 | *pHHcount = deleted_holddown_nve_count; | |
4786 | ||
4787 | VNC_ITRCCK; | |
65efcfce LB |
4788 | } |
4789 | ||
4790 | /*------------------------------------------ | |
4791 | * rfapiCountRemoteRoutes | |
4792 | * | |
4793 | * UI helper: count VRF routes from BGP side | |
4794 | * | |
d62a17ae | 4795 | * input: |
65efcfce LB |
4796 | * |
4797 | * output | |
4798 | * pALRcount count of active local routes | |
4799 | * pARRcount count of active remote routes | |
4800 | * pHRcount count of holddown routes | |
4801 | * pIRcount count of direct imported routes | |
4802 | * | |
4803 | * return value: | |
4804 | * void | |
4805 | --------------------------------------------*/ | |
d62a17ae | 4806 | void rfapiCountAllItRoutes(int *pALRcount, /* active local routes */ |
4807 | int *pARRcount, /* active remote routes */ | |
4808 | int *pHRcount, /* holddown routes */ | |
4809 | int *pIRcount) /* imported routes */ | |
65efcfce | 4810 | { |
d62a17ae | 4811 | struct bgp *bgp; |
4812 | struct rfapi *h; | |
4813 | struct rfapi_import_table *it; | |
4814 | afi_t afi; | |
4815 | ||
4816 | int total_active_local = 0; | |
4817 | int total_active_remote = 0; | |
4818 | int total_holddown = 0; | |
4819 | int total_imported = 0; | |
4820 | ||
4821 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
4822 | assert(bgp); | |
4823 | ||
4824 | h = bgp->rfapi; | |
4825 | assert(h); | |
4826 | ||
4827 | /* | |
4828 | * Iterate over all import tables; do a filtered import | |
4829 | * for the afi/safi combination | |
4830 | */ | |
4831 | ||
4832 | for (it = h->imports; it; it = it->next) { | |
4833 | ||
4834 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
4835 | ||
4836 | total_active_local += it->local_count[afi]; | |
4837 | total_active_remote += it->remote_count[afi]; | |
4838 | total_holddown += it->holddown_count[afi]; | |
4839 | total_imported += it->imported_count[afi]; | |
4840 | } | |
4841 | } | |
4842 | ||
4843 | void *cursor; | |
4844 | int rc; | |
4845 | ||
4846 | if (h->import_mac) { | |
9d303b37 DL |
4847 | for (cursor = NULL, |
4848 | rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4849 | &cursor); | |
d62a17ae | 4850 | !rc; rc = skiplist_next(h->import_mac, NULL, (void **)&it, |
4851 | &cursor)) { | |
4852 | ||
4853 | total_active_local += it->local_count[AFI_L2VPN]; | |
4854 | total_active_remote += it->remote_count[AFI_L2VPN]; | |
4855 | total_holddown += it->holddown_count[AFI_L2VPN]; | |
4856 | total_imported += it->imported_count[AFI_L2VPN]; | |
4857 | } | |
4858 | } | |
4859 | ||
4860 | ||
4861 | if (pALRcount) { | |
4862 | *pALRcount = total_active_local; | |
4863 | } | |
4864 | if (pARRcount) { | |
4865 | *pARRcount = total_active_remote; | |
4866 | } | |
4867 | if (pHRcount) { | |
4868 | *pHRcount = total_holddown; | |
4869 | } | |
4870 | if (pIRcount) { | |
4871 | *pIRcount = total_imported; | |
4872 | } | |
65efcfce LB |
4873 | } |
4874 | ||
4875 | /*------------------------------------------ | |
4876 | * rfapiGetHolddownFromLifetime | |
4877 | * | |
4878 | * calculate holddown value based on lifetime | |
4879 | * | |
d62a17ae | 4880 | * input: |
65efcfce LB |
4881 | * lifetime lifetime |
4882 | * | |
4883 | * return value: | |
4884 | * Holddown value based on lifetime, holddown_factor, | |
4885 | * and RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY | |
4886 | * | |
4887 | --------------------------------------------*/ | |
4888 | /* hold down time maxes out at RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY */ | |
d62a17ae | 4889 | uint32_t rfapiGetHolddownFromLifetime(uint32_t lifetime) |
65efcfce | 4890 | { |
d62a17ae | 4891 | uint32_t factor; |
4892 | struct bgp *bgp; | |
4893 | ||
4894 | bgp = bgp_get_default(); | |
4895 | if (bgp && bgp->rfapi_cfg) | |
4896 | factor = bgp->rfapi_cfg->rfp_cfg.holddown_factor; | |
4897 | else | |
4898 | factor = RFAPI_RFP_CFG_DEFAULT_HOLDDOWN_FACTOR; | |
4899 | ||
4900 | if (factor < 100 || lifetime < RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY) | |
4901 | lifetime = lifetime * factor / 100; | |
4902 | if (lifetime < RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY) | |
4903 | return lifetime; | |
4904 | else | |
4905 | return RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY; | |
65efcfce | 4906 | } |