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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 | } | |
a2e219fe PG |
553 | if (goner->extra) |
554 | bgp_path_info_extra_free(&goner->extra); | |
d62a17ae | 555 | XFREE(MTYPE_BGP_ROUTE, goner); |
65efcfce LB |
556 | } |
557 | ||
d62a17ae | 558 | struct rfapi_import_table *rfapiMacImportTableGetNoAlloc(struct bgp *bgp, |
559 | uint32_t lni) | |
65efcfce | 560 | { |
d62a17ae | 561 | struct rfapi *h; |
562 | struct rfapi_import_table *it = NULL; | |
563 | uintptr_t lni_as_ptr = lni; | |
65efcfce | 564 | |
d62a17ae | 565 | h = bgp->rfapi; |
566 | if (!h) | |
567 | return NULL; | |
65efcfce | 568 | |
d62a17ae | 569 | if (!h->import_mac) |
570 | return NULL; | |
65efcfce | 571 | |
d62a17ae | 572 | if (skiplist_search(h->import_mac, (void *)lni_as_ptr, (void **)&it)) |
573 | return NULL; | |
65efcfce | 574 | |
d62a17ae | 575 | return it; |
65efcfce LB |
576 | } |
577 | ||
d62a17ae | 578 | struct rfapi_import_table *rfapiMacImportTableGet(struct bgp *bgp, uint32_t lni) |
65efcfce | 579 | { |
d62a17ae | 580 | struct rfapi *h; |
581 | struct rfapi_import_table *it = NULL; | |
582 | uintptr_t lni_as_ptr = lni; | |
583 | ||
584 | h = bgp->rfapi; | |
585 | assert(h); | |
586 | ||
587 | if (!h->import_mac) { | |
588 | /* default cmp is good enough for LNI */ | |
589 | h->import_mac = skiplist_new(0, NULL, NULL); | |
590 | } | |
591 | ||
592 | if (skiplist_search(h->import_mac, (void *)lni_as_ptr, (void **)&it)) { | |
593 | ||
594 | struct ecommunity *enew; | |
595 | struct ecommunity_val eval; | |
596 | afi_t afi; | |
597 | ||
598 | it = XCALLOC(MTYPE_RFAPI_IMPORTTABLE, | |
599 | sizeof(struct rfapi_import_table)); | |
600 | /* set RT list of new import table based on LNI */ | |
601 | memset((char *)&eval, 0, sizeof(eval)); | |
602 | eval.val[0] = 0; /* VNC L2VPN */ | |
603 | eval.val[1] = 2; /* VNC L2VPN */ | |
604 | eval.val[5] = (lni >> 16) & 0xff; | |
605 | eval.val[6] = (lni >> 8) & 0xff; | |
606 | eval.val[7] = (lni >> 0) & 0xff; | |
607 | ||
608 | enew = ecommunity_new(); | |
609 | ecommunity_add_val(enew, &eval); | |
610 | it->rt_import_list = enew; | |
611 | ||
612 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
fe08ba7e DS |
613 | it->imported_vpn[afi] = agg_table_init(); |
614 | it->imported_encap[afi] = agg_table_init(); | |
d62a17ae | 615 | } |
616 | ||
617 | it->l2_logical_net_id = lni; | |
618 | ||
619 | skiplist_insert(h->import_mac, (void *)lni_as_ptr, it); | |
620 | } | |
621 | ||
622 | assert(it); | |
623 | return it; | |
65efcfce LB |
624 | } |
625 | ||
626 | /* | |
627 | * Implement MONITOR_MOVE_SHORTER(original_node) from | |
628 | * RFAPI-Import-Event-Handling.txt | |
d62a17ae | 629 | * |
65efcfce LB |
630 | * Returns pointer to the list of moved monitors |
631 | */ | |
632 | static struct rfapi_monitor_vpn * | |
fe08ba7e | 633 | rfapiMonitorMoveShorter(struct agg_node *original_vpn_node, int lockoffset) |
65efcfce | 634 | { |
40381db7 | 635 | struct bgp_path_info *bpi; |
fe08ba7e | 636 | struct agg_node *par; |
d62a17ae | 637 | struct rfapi_monitor_vpn *m; |
638 | struct rfapi_monitor_vpn *mlast; | |
639 | struct rfapi_monitor_vpn *moved; | |
640 | int movecount = 0; | |
641 | int parent_already_refcounted = 0; | |
65efcfce | 642 | |
d62a17ae | 643 | RFAPI_CHECK_REFCOUNT(original_vpn_node, SAFI_MPLS_VPN, lockoffset); |
65efcfce LB |
644 | |
645 | #if DEBUG_MONITOR_MOVE_SHORTER | |
d62a17ae | 646 | { |
872ed4c7 | 647 | char buf[PREFIX_STRLEN]; |
65efcfce | 648 | |
872ed4c7 | 649 | prefix2str(&original_vpn_node->p, buf, sizeof(buf)); |
d62a17ae | 650 | vnc_zlog_debug_verbose("%s: called with node pfx=%s", __func__, |
651 | buf); | |
652 | } | |
65efcfce LB |
653 | #endif |
654 | ||
d62a17ae | 655 | /* |
40381db7 | 656 | * 1. If there is at least one bpi (either regular route or |
d62a17ae | 657 | * route marked as withdrawn, with a pending timer) at |
658 | * original_node with a valid UN address, we're done. Return. | |
659 | */ | |
40381db7 | 660 | for (bpi = original_vpn_node->info; bpi; bpi = bpi->next) { |
d62a17ae | 661 | struct prefix pfx; |
662 | ||
40381db7 | 663 | if (!rfapiGetUnAddrOfVpnBi(bpi, &pfx)) { |
65efcfce | 664 | #if DEBUG_MONITOR_MOVE_SHORTER |
d62a17ae | 665 | vnc_zlog_debug_verbose( |
666 | "%s: have valid UN at original node, no change", | |
667 | __func__); | |
65efcfce | 668 | #endif |
d62a17ae | 669 | return NULL; |
670 | } | |
671 | } | |
672 | ||
673 | /* | |
674 | * 2. Travel up the tree (toward less-specific prefixes) from | |
675 | * original_node to find the first node that has at least | |
676 | * one route (even if it is only a withdrawn route) with a | |
677 | * valid UN address. Call this node "Node P." | |
678 | */ | |
fe08ba7e DS |
679 | for (par = agg_node_parent(original_vpn_node); par; |
680 | par = agg_node_parent(par)) { | |
40381db7 | 681 | for (bpi = par->info; bpi; bpi = bpi->next) { |
d62a17ae | 682 | struct prefix pfx; |
40381db7 | 683 | if (!rfapiGetUnAddrOfVpnBi(bpi, &pfx)) { |
d62a17ae | 684 | break; |
685 | } | |
686 | } | |
40381db7 | 687 | if (bpi) |
d62a17ae | 688 | break; |
689 | } | |
690 | ||
691 | if (par) { | |
692 | RFAPI_CHECK_REFCOUNT(par, SAFI_MPLS_VPN, 0); | |
693 | } | |
694 | ||
695 | /* | |
696 | * If no less-specific routes, try to use the 0/0 node | |
697 | */ | |
698 | if (!par) { | |
699 | /* this isn't necessarily 0/0 */ | |
fe08ba7e | 700 | par = agg_route_table_top(original_vpn_node); |
d62a17ae | 701 | |
702 | /* | |
703 | * If we got the top node but it wasn't 0/0, | |
704 | * ignore it | |
705 | */ | |
706 | if (par && par->p.prefixlen) { | |
fe08ba7e | 707 | agg_unlock_node(par); /* maybe free */ |
d62a17ae | 708 | par = NULL; |
709 | } | |
710 | ||
711 | if (par) { | |
712 | ++parent_already_refcounted; | |
713 | } | |
714 | } | |
715 | ||
716 | /* | |
717 | * Create 0/0 node if it isn't there | |
718 | */ | |
719 | if (!par) { | |
720 | struct prefix pfx_default; | |
721 | ||
722 | memset(&pfx_default, 0, sizeof(pfx_default)); | |
723 | pfx_default.family = original_vpn_node->p.family; | |
724 | ||
725 | /* creates default node if none exists */ | |
fe08ba7e DS |
726 | par = agg_node_get(agg_get_table(original_vpn_node), |
727 | &pfx_default); | |
d62a17ae | 728 | ++parent_already_refcounted; |
729 | } | |
730 | ||
731 | /* | |
732 | * 3. Move each of the monitors found at original_node to Node P. | |
733 | * These are "Moved Monitors." | |
734 | * | |
735 | */ | |
736 | ||
737 | /* | |
738 | * Attach at end so that the list pointer we return points | |
739 | * only to the moved routes | |
740 | */ | |
741 | for (m = RFAPI_MONITOR_VPN(par), mlast = NULL; m; | |
742 | mlast = m, m = m->next) | |
743 | ; | |
744 | ||
745 | if (mlast) { | |
746 | moved = mlast->next = RFAPI_MONITOR_VPN(original_vpn_node); | |
747 | } else { | |
748 | moved = RFAPI_MONITOR_VPN_W_ALLOC(par) = | |
749 | RFAPI_MONITOR_VPN(original_vpn_node); | |
750 | } | |
751 | if (RFAPI_MONITOR_VPN( | |
752 | original_vpn_node)) /* check agg, so not allocated */ | |
753 | RFAPI_MONITOR_VPN_W_ALLOC(original_vpn_node) = NULL; | |
754 | ||
755 | /* | |
756 | * update the node pointers on the monitors | |
757 | */ | |
758 | for (m = moved; m; m = m->next) { | |
759 | ++movecount; | |
760 | m->node = par; | |
761 | } | |
762 | ||
763 | RFAPI_CHECK_REFCOUNT(par, SAFI_MPLS_VPN, | |
764 | parent_already_refcounted - movecount); | |
765 | while (movecount > parent_already_refcounted) { | |
fe08ba7e | 766 | agg_lock_node(par); |
d62a17ae | 767 | ++parent_already_refcounted; |
768 | } | |
769 | while (movecount < parent_already_refcounted) { | |
770 | /* unlikely, but code defensively */ | |
fe08ba7e | 771 | agg_unlock_node(par); |
d62a17ae | 772 | --parent_already_refcounted; |
773 | } | |
774 | RFAPI_CHECK_REFCOUNT(original_vpn_node, SAFI_MPLS_VPN, | |
775 | movecount + lockoffset); | |
776 | while (movecount--) { | |
fe08ba7e | 777 | agg_unlock_node(original_vpn_node); |
d62a17ae | 778 | } |
65efcfce LB |
779 | |
780 | #if DEBUG_MONITOR_MOVE_SHORTER | |
d62a17ae | 781 | { |
872ed4c7 | 782 | char buf[PREFIX_STRLEN]; |
65efcfce | 783 | |
872ed4c7 | 784 | prefix2str(&par->p, buf, sizeof(buf)); |
d62a17ae | 785 | vnc_zlog_debug_verbose("%s: moved to node pfx=%s", __func__, |
786 | buf); | |
787 | } | |
65efcfce LB |
788 | #endif |
789 | ||
790 | ||
d62a17ae | 791 | return moved; |
65efcfce LB |
792 | } |
793 | ||
794 | /* | |
795 | * Implement MONITOR_MOVE_LONGER(new_node) from | |
796 | * RFAPI-Import-Event-Handling.txt | |
797 | */ | |
fe08ba7e | 798 | static void rfapiMonitorMoveLonger(struct agg_node *new_vpn_node) |
65efcfce | 799 | { |
d62a17ae | 800 | struct rfapi_monitor_vpn *monitor; |
801 | struct rfapi_monitor_vpn *mlast; | |
40381db7 | 802 | struct bgp_path_info *bpi; |
fe08ba7e | 803 | struct agg_node *par; |
d62a17ae | 804 | |
805 | RFAPI_CHECK_REFCOUNT(new_vpn_node, SAFI_MPLS_VPN, 0); | |
806 | ||
807 | /* | |
808 | * Make sure we have at least one valid route at the new node | |
809 | */ | |
40381db7 | 810 | for (bpi = new_vpn_node->info; bpi; bpi = bpi->next) { |
d62a17ae | 811 | struct prefix pfx; |
40381db7 | 812 | if (!rfapiGetUnAddrOfVpnBi(bpi, &pfx)) |
d62a17ae | 813 | break; |
814 | } | |
815 | ||
40381db7 | 816 | if (!bpi) { |
d62a17ae | 817 | vnc_zlog_debug_verbose( |
818 | "%s: no valid routes at node %p, so not attempting moves", | |
819 | __func__, new_vpn_node); | |
820 | return; | |
821 | } | |
822 | ||
823 | /* | |
824 | * Find first parent node that has monitors | |
825 | */ | |
fe08ba7e DS |
826 | for (par = agg_node_parent(new_vpn_node); par; |
827 | par = agg_node_parent(par)) { | |
d62a17ae | 828 | if (RFAPI_MONITOR_VPN(par)) |
829 | break; | |
830 | } | |
831 | ||
832 | if (!par) { | |
833 | vnc_zlog_debug_verbose( | |
834 | "%s: no parent nodes with monitors, done", __func__); | |
835 | return; | |
836 | } | |
837 | ||
838 | /* | |
839 | * Check each of these monitors to see of their longest-match | |
840 | * is now the updated node. Move any such monitors to the more- | |
841 | * specific updated node | |
842 | */ | |
843 | for (mlast = NULL, monitor = RFAPI_MONITOR_VPN(par); monitor;) { | |
844 | ||
845 | /* | |
846 | * If new longest match for monitor prefix is the new | |
847 | * route's prefix, move monitor to new route's prefix | |
848 | */ | |
849 | if (prefix_match(&new_vpn_node->p, &monitor->p)) { | |
850 | /* detach */ | |
851 | if (mlast) { | |
852 | mlast->next = monitor->next; | |
853 | } else { | |
854 | RFAPI_MONITOR_VPN_W_ALLOC(par) = monitor->next; | |
855 | } | |
856 | ||
857 | ||
858 | /* attach */ | |
859 | monitor->next = RFAPI_MONITOR_VPN(new_vpn_node); | |
860 | RFAPI_MONITOR_VPN_W_ALLOC(new_vpn_node) = monitor; | |
861 | monitor->node = new_vpn_node; | |
862 | ||
fe08ba7e | 863 | agg_lock_node(new_vpn_node); /* incr refcount */ |
d62a17ae | 864 | |
865 | monitor = mlast ? mlast->next : RFAPI_MONITOR_VPN(par); | |
866 | ||
867 | RFAPI_CHECK_REFCOUNT(par, SAFI_MPLS_VPN, 1); | |
868 | /* decr refcount after we're done with par as this might | |
869 | * free it */ | |
fe08ba7e | 870 | agg_unlock_node(par); |
d62a17ae | 871 | |
872 | continue; | |
873 | } | |
874 | mlast = monitor; | |
875 | monitor = monitor->next; | |
876 | } | |
877 | ||
878 | RFAPI_CHECK_REFCOUNT(new_vpn_node, SAFI_MPLS_VPN, 0); | |
65efcfce LB |
879 | } |
880 | ||
881 | ||
40381db7 | 882 | static void rfapiBgpInfoChainFree(struct bgp_path_info *bpi) |
65efcfce | 883 | { |
4b7e6066 | 884 | struct bgp_path_info *next; |
d62a17ae | 885 | |
40381db7 | 886 | while (bpi) { |
d62a17ae | 887 | |
888 | /* | |
40381db7 | 889 | * If there is a timer waiting to delete this bpi, cancel |
d62a17ae | 890 | * the timer and delete immediately |
891 | */ | |
40381db7 DS |
892 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
893 | && bpi->extra->vnc.import.timer) { | |
d62a17ae | 894 | |
895 | struct thread *t = | |
40381db7 | 896 | (struct thread *)bpi->extra->vnc.import.timer; |
d62a17ae | 897 | struct rfapi_withdraw *wcb = t->arg; |
898 | ||
899 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
900 | thread_cancel(t); | |
901 | } | |
902 | ||
40381db7 DS |
903 | next = bpi->next; |
904 | bpi->next = NULL; | |
905 | rfapiBgpInfoFree(bpi); | |
906 | bpi = next; | |
d62a17ae | 907 | } |
65efcfce LB |
908 | } |
909 | ||
d62a17ae | 910 | static void rfapiImportTableFlush(struct rfapi_import_table *it) |
65efcfce | 911 | { |
d62a17ae | 912 | afi_t afi; |
913 | ||
914 | /* | |
915 | * Free ecommunity | |
916 | */ | |
917 | ecommunity_free(&it->rt_import_list); | |
918 | it->rt_import_list = NULL; | |
919 | ||
920 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
921 | ||
fe08ba7e | 922 | struct agg_node *rn; |
d62a17ae | 923 | |
fe08ba7e DS |
924 | for (rn = agg_route_top(it->imported_vpn[afi]); rn; |
925 | rn = agg_route_next(rn)) { | |
d62a17ae | 926 | /* |
927 | * Each route_node has: | |
928 | * aggregate: points to rfapi_it_extra with monitor | |
929 | * chain(s) | |
9b6d8fcf | 930 | * info: points to chain of bgp_path_info |
d62a17ae | 931 | */ |
9b6d8fcf | 932 | /* free bgp_path_info and its children */ |
d62a17ae | 933 | rfapiBgpInfoChainFree(rn->info); |
934 | rn->info = NULL; | |
935 | ||
936 | rfapiMonitorExtraFlush(SAFI_MPLS_VPN, rn); | |
937 | } | |
938 | ||
fe08ba7e DS |
939 | for (rn = agg_route_top(it->imported_encap[afi]); rn; |
940 | rn = agg_route_next(rn)) { | |
9b6d8fcf | 941 | /* free bgp_path_info and its children */ |
d62a17ae | 942 | rfapiBgpInfoChainFree(rn->info); |
943 | rn->info = NULL; | |
944 | ||
945 | rfapiMonitorExtraFlush(SAFI_ENCAP, rn); | |
946 | } | |
947 | ||
fe08ba7e DS |
948 | agg_table_finish(it->imported_vpn[afi]); |
949 | agg_table_finish(it->imported_encap[afi]); | |
d62a17ae | 950 | } |
951 | if (it->monitor_exterior_orphans) { | |
952 | skiplist_free(it->monitor_exterior_orphans); | |
953 | } | |
65efcfce LB |
954 | } |
955 | ||
d62a17ae | 956 | void rfapiImportTableRefDelByIt(struct bgp *bgp, |
957 | struct rfapi_import_table *it_target) | |
65efcfce | 958 | { |
d62a17ae | 959 | struct rfapi *h; |
960 | struct rfapi_import_table *it; | |
961 | struct rfapi_import_table *prev = NULL; | |
962 | ||
963 | assert(it_target); | |
964 | ||
965 | h = bgp->rfapi; | |
966 | assert(h); | |
967 | ||
968 | for (it = h->imports; it; prev = it, it = it->next) { | |
969 | if (it == it_target) | |
970 | break; | |
971 | } | |
972 | ||
973 | assert(it); | |
974 | assert(it->refcount); | |
975 | ||
976 | it->refcount -= 1; | |
977 | ||
978 | if (!it->refcount) { | |
979 | if (prev) { | |
980 | prev->next = it->next; | |
981 | } else { | |
982 | h->imports = it->next; | |
983 | } | |
984 | rfapiImportTableFlush(it); | |
985 | XFREE(MTYPE_RFAPI_IMPORTTABLE, it); | |
986 | } | |
65efcfce LB |
987 | } |
988 | ||
989 | #if RFAPI_REQUIRE_ENCAP_BEEC | |
990 | /* | |
991 | * Look for magic BGP Encapsulation Extended Community value | |
992 | * Format in RFC 5512 Sect. 4.5 | |
993 | */ | |
d62a17ae | 994 | static int rfapiEcommunitiesMatchBeec(struct ecommunity *ecom, |
995 | bgp_encap_types type) | |
65efcfce | 996 | { |
d62a17ae | 997 | int i; |
65efcfce | 998 | |
d62a17ae | 999 | if (!ecom) |
1000 | return 0; | |
65efcfce | 1001 | |
d62a17ae | 1002 | for (i = 0; i < (ecom->size * ECOMMUNITY_SIZE); i += ECOMMUNITY_SIZE) { |
65efcfce | 1003 | |
d62a17ae | 1004 | uint8_t *ep; |
65efcfce | 1005 | |
d62a17ae | 1006 | ep = ecom->val + i; |
65efcfce | 1007 | |
d62a17ae | 1008 | if (ep[0] == ECOMMUNITY_ENCODE_OPAQUE |
1009 | && ep[1] == ECOMMUNITY_OPAQUE_SUBTYPE_ENCAP | |
1010 | && ep[6] == ((type && 0xff00) >> 8) | |
1011 | && ep[7] == (type & 0xff)) { | |
65efcfce | 1012 | |
d62a17ae | 1013 | return 1; |
1014 | } | |
1015 | } | |
1016 | return 0; | |
65efcfce LB |
1017 | } |
1018 | #endif | |
1019 | ||
d62a17ae | 1020 | int rfapiEcommunitiesIntersect(struct ecommunity *e1, struct ecommunity *e2) |
65efcfce | 1021 | { |
d62a17ae | 1022 | int i, j; |
1023 | ||
1024 | if (!e1 || !e2) | |
1025 | return 0; | |
1026 | ||
1027 | { | |
1028 | char *s1, *s2; | |
1029 | s1 = ecommunity_ecom2str(e1, ECOMMUNITY_FORMAT_DISPLAY, 0); | |
1030 | s2 = ecommunity_ecom2str(e2, ECOMMUNITY_FORMAT_DISPLAY, 0); | |
1031 | vnc_zlog_debug_verbose("%s: e1[%s], e2[%s]", __func__, s1, s2); | |
1032 | XFREE(MTYPE_ECOMMUNITY_STR, s1); | |
1033 | XFREE(MTYPE_ECOMMUNITY_STR, s2); | |
1034 | } | |
1035 | ||
1036 | for (i = 0; i < e1->size; ++i) { | |
1037 | for (j = 0; j < e2->size; ++j) { | |
1038 | if (!memcmp(e1->val + (i * ECOMMUNITY_SIZE), | |
1039 | e2->val + (j * ECOMMUNITY_SIZE), | |
1040 | ECOMMUNITY_SIZE)) { | |
1041 | ||
1042 | return 1; | |
1043 | } | |
1044 | } | |
1045 | } | |
1046 | return 0; | |
65efcfce LB |
1047 | } |
1048 | ||
d62a17ae | 1049 | int rfapiEcommunityGetLNI(struct ecommunity *ecom, uint32_t *lni) |
65efcfce | 1050 | { |
d62a17ae | 1051 | if (ecom) { |
1052 | int i; | |
1053 | for (i = 0; i < ecom->size; ++i) { | |
1054 | uint8_t *p = ecom->val + (i * ECOMMUNITY_SIZE); | |
1055 | ||
1056 | if ((*(p + 0) == 0x00) && (*(p + 1) == 0x02)) { | |
1057 | ||
1058 | *lni = (*(p + 5) << 16) | (*(p + 6) << 8) | |
1059 | | (*(p + 7)); | |
1060 | return 0; | |
1061 | } | |
1062 | } | |
1063 | } | |
1064 | return ENOENT; | |
65efcfce LB |
1065 | } |
1066 | ||
d62a17ae | 1067 | int rfapiEcommunityGetEthernetTag(struct ecommunity *ecom, uint16_t *tag_id) |
79799987 | 1068 | { |
d62a17ae | 1069 | struct bgp *bgp = bgp_get_default(); |
1070 | *tag_id = 0; /* default to untagged */ | |
1071 | if (ecom) { | |
1072 | int i; | |
1073 | for (i = 0; i < ecom->size; ++i) { | |
1074 | as_t as = 0; | |
1075 | int encode = 0; | |
1076 | uint8_t *p = ecom->val + (i * ECOMMUNITY_SIZE); | |
1077 | ||
1078 | /* High-order octet of type. */ | |
1079 | encode = *p++; | |
1080 | ||
1081 | if (*p++ == ECOMMUNITY_ROUTE_TARGET) { | |
1082 | if (encode == ECOMMUNITY_ENCODE_AS4) { | |
937652c6 | 1083 | p = ptr_get_be32(p, &as); |
d62a17ae | 1084 | } else if (encode == ECOMMUNITY_ENCODE_AS) { |
1085 | as = (*p++ << 8); | |
1086 | as |= (*p++); | |
996c9314 LB |
1087 | p += 2; /* skip next two, tag/vid |
1088 | always in lowest bytes */ | |
d62a17ae | 1089 | } |
1090 | if (as == bgp->as) { | |
1091 | *tag_id = *p++ << 8; | |
1092 | *tag_id |= (*p++); | |
1093 | return 0; | |
1094 | } | |
1095 | } | |
1096 | } | |
1097 | } | |
1098 | return ENOENT; | |
79799987 LB |
1099 | } |
1100 | ||
40381db7 | 1101 | static int rfapiVpnBiNhEqualsPt(struct bgp_path_info *bpi, |
4b7e6066 | 1102 | struct rfapi_ip_addr *hpt) |
65efcfce | 1103 | { |
d62a17ae | 1104 | uint8_t family; |
65efcfce | 1105 | |
40381db7 | 1106 | if (!hpt || !bpi) |
d62a17ae | 1107 | return 0; |
65efcfce | 1108 | |
40381db7 | 1109 | family = BGP_MP_NEXTHOP_FAMILY(bpi->attr->mp_nexthop_len); |
65efcfce | 1110 | |
d62a17ae | 1111 | if (hpt->addr_family != family) |
1112 | return 0; | |
65efcfce | 1113 | |
d62a17ae | 1114 | switch (family) { |
1115 | case AF_INET: | |
40381db7 | 1116 | if (bpi->attr->mp_nexthop_global_in.s_addr |
d62a17ae | 1117 | != hpt->addr.v4.s_addr) |
1118 | return 0; | |
1119 | break; | |
65efcfce | 1120 | |
d62a17ae | 1121 | case AF_INET6: |
40381db7 | 1122 | if (IPV6_ADDR_CMP(&bpi->attr->mp_nexthop_global, &hpt->addr.v6)) |
d62a17ae | 1123 | return 0; |
1124 | break; | |
65efcfce | 1125 | |
d62a17ae | 1126 | default: |
1127 | return 0; | |
1128 | break; | |
1129 | } | |
65efcfce | 1130 | |
d62a17ae | 1131 | return 1; |
65efcfce LB |
1132 | } |
1133 | ||
1134 | ||
1135 | /* | |
1136 | * Compare 2 VPN BIs. Return true if they have the same VN and UN addresses | |
1137 | */ | |
40381db7 DS |
1138 | static int rfapiVpnBiSamePtUn(struct bgp_path_info *bpi1, |
1139 | struct bgp_path_info *bpi2) | |
65efcfce | 1140 | { |
d62a17ae | 1141 | struct prefix pfx_un1; |
1142 | struct prefix pfx_un2; | |
1143 | ||
40381db7 | 1144 | if (!bpi1 || !bpi2) |
d62a17ae | 1145 | return 0; |
1146 | ||
40381db7 | 1147 | if (!bpi1->attr || !bpi2->attr) |
d62a17ae | 1148 | return 0; |
1149 | ||
1150 | /* | |
1151 | * VN address comparisons | |
1152 | */ | |
1153 | ||
40381db7 DS |
1154 | if (BGP_MP_NEXTHOP_FAMILY(bpi1->attr->mp_nexthop_len) |
1155 | != BGP_MP_NEXTHOP_FAMILY(bpi2->attr->mp_nexthop_len)) { | |
d62a17ae | 1156 | return 0; |
1157 | } | |
1158 | ||
40381db7 | 1159 | switch (BGP_MP_NEXTHOP_FAMILY(bpi1->attr->mp_nexthop_len)) { |
d62a17ae | 1160 | case AF_INET: |
40381db7 DS |
1161 | if (bpi1->attr->mp_nexthop_global_in.s_addr |
1162 | != bpi2->attr->mp_nexthop_global_in.s_addr) | |
d62a17ae | 1163 | return 0; |
1164 | break; | |
1165 | ||
1166 | case AF_INET6: | |
40381db7 DS |
1167 | if (IPV6_ADDR_CMP(&bpi1->attr->mp_nexthop_global, |
1168 | &bpi2->attr->mp_nexthop_global)) | |
d62a17ae | 1169 | return 0; |
1170 | break; | |
1171 | ||
1172 | default: | |
1173 | return 0; | |
1174 | break; | |
1175 | } | |
1176 | ||
1177 | /* | |
1178 | * UN address comparisons | |
1179 | */ | |
40381db7 DS |
1180 | if (rfapiGetVncTunnelUnAddr(bpi1->attr, &pfx_un1)) { |
1181 | if (bpi1->extra) { | |
1182 | pfx_un1.family = bpi1->extra->vnc.import.un_family; | |
1183 | switch (bpi1->extra->vnc.import.un_family) { | |
d62a17ae | 1184 | case AF_INET: |
1185 | pfx_un1.u.prefix4 = | |
40381db7 | 1186 | bpi1->extra->vnc.import.un.addr4; |
d62a17ae | 1187 | break; |
1188 | case AF_INET6: | |
1189 | pfx_un1.u.prefix6 = | |
40381db7 | 1190 | bpi1->extra->vnc.import.un.addr6; |
d62a17ae | 1191 | break; |
1192 | default: | |
1193 | pfx_un1.family = 0; | |
1194 | break; | |
1195 | } | |
1196 | } | |
1197 | } | |
1198 | ||
40381db7 DS |
1199 | if (rfapiGetVncTunnelUnAddr(bpi2->attr, &pfx_un2)) { |
1200 | if (bpi2->extra) { | |
1201 | pfx_un2.family = bpi2->extra->vnc.import.un_family; | |
1202 | switch (bpi2->extra->vnc.import.un_family) { | |
d62a17ae | 1203 | case AF_INET: |
1204 | pfx_un2.u.prefix4 = | |
40381db7 | 1205 | bpi2->extra->vnc.import.un.addr4; |
d62a17ae | 1206 | break; |
1207 | case AF_INET6: | |
1208 | pfx_un2.u.prefix6 = | |
40381db7 | 1209 | bpi2->extra->vnc.import.un.addr6; |
d62a17ae | 1210 | break; |
1211 | default: | |
1212 | pfx_un2.family = 0; | |
1213 | break; | |
1214 | } | |
1215 | } | |
1216 | } | |
1217 | ||
1218 | if (!pfx_un1.family || !pfx_un2.family) | |
1219 | return 0; | |
1220 | ||
1221 | if (pfx_un1.family != pfx_un2.family) | |
1222 | return 0; | |
1223 | ||
1224 | switch (pfx_un1.family) { | |
1225 | case AF_INET: | |
996c9314 | 1226 | if (!IPV4_ADDR_SAME(&pfx_un1.u.prefix4, &pfx_un2.u.prefix4)) |
d62a17ae | 1227 | return 0; |
1228 | break; | |
1229 | case AF_INET6: | |
1230 | if (!IPV6_ADDR_SAME(&pfx_un1.u.prefix6, &pfx_un2.u.prefix6)) | |
1231 | return 0; | |
1232 | break; | |
1233 | } | |
1234 | ||
1235 | ||
1236 | return 1; | |
65efcfce LB |
1237 | } |
1238 | ||
d62a17ae | 1239 | uint8_t rfapiRfpCost(struct attr *attr) |
65efcfce | 1240 | { |
d62a17ae | 1241 | if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF)) { |
1242 | if (attr->local_pref > 255) { | |
1243 | return 0; | |
1244 | } | |
1245 | return 255 - attr->local_pref; | |
1246 | } | |
1247 | ||
1248 | return 255; | |
65efcfce LB |
1249 | } |
1250 | ||
1251 | /*------------------------------------------ | |
1252 | * rfapi_extract_l2o | |
1253 | * | |
d62a17ae | 1254 | * Find Layer 2 options in an option chain |
65efcfce | 1255 | * |
d62a17ae | 1256 | * input: |
65efcfce LB |
1257 | * pHop option chain |
1258 | * | |
1259 | * output: | |
1260 | * l2o layer 2 options extracted | |
1261 | * | |
1262 | * return value: | |
1263 | * 0 OK | |
1264 | * 1 no options found | |
1265 | * | |
1266 | --------------------------------------------*/ | |
d62a17ae | 1267 | int rfapi_extract_l2o( |
1268 | struct bgp_tea_options *pHop, /* chain of options */ | |
1269 | struct rfapi_l2address_option *l2o) /* return extracted value */ | |
65efcfce | 1270 | { |
d62a17ae | 1271 | struct bgp_tea_options *p; |
65efcfce | 1272 | |
d62a17ae | 1273 | for (p = pHop; p; p = p->next) { |
1274 | if ((p->type == RFAPI_VN_OPTION_TYPE_L2ADDR) | |
1275 | && (p->length >= 8)) { | |
65efcfce | 1276 | |
d62a17ae | 1277 | char *v = p->value; |
65efcfce | 1278 | |
d62a17ae | 1279 | memcpy(&l2o->macaddr, v, 6); |
65efcfce | 1280 | |
d62a17ae | 1281 | l2o->label = ((v[6] << 12) & 0xff000) |
1282 | + ((v[7] << 4) & 0xff0) | |
1283 | + ((v[8] >> 4) & 0xf); | |
65efcfce | 1284 | |
d62a17ae | 1285 | l2o->local_nve_id = (uint8_t)v[10]; |
65efcfce | 1286 | |
d62a17ae | 1287 | l2o->logical_net_id = |
1288 | (v[11] << 16) + (v[12] << 8) + (v[13] << 0); | |
65efcfce | 1289 | |
d62a17ae | 1290 | return 0; |
1291 | } | |
1292 | } | |
1293 | return 1; | |
65efcfce LB |
1294 | } |
1295 | ||
1296 | static struct rfapi_next_hop_entry * | |
d62a17ae | 1297 | rfapiRouteInfo2NextHopEntry(struct rfapi_ip_prefix *rprefix, |
40381db7 DS |
1298 | struct bgp_path_info *bpi, /* route to encode */ |
1299 | uint32_t lifetime, /* use this in nhe */ | |
1300 | struct agg_node *rn) /* req for L2 eth addr */ | |
65efcfce | 1301 | { |
d62a17ae | 1302 | struct rfapi_next_hop_entry *new; |
1303 | int have_vnc_tunnel_un = 0; | |
65efcfce LB |
1304 | |
1305 | #if DEBUG_ENCAP_MONITOR | |
40381db7 | 1306 | vnc_zlog_debug_verbose("%s: entry, bpi %p, rn %p", __func__, bpi, rn); |
65efcfce LB |
1307 | #endif |
1308 | ||
d62a17ae | 1309 | new = XCALLOC(MTYPE_RFAPI_NEXTHOP, sizeof(struct rfapi_next_hop_entry)); |
1310 | assert(new); | |
1311 | ||
1312 | new->prefix = *rprefix; | |
1313 | ||
40381db7 DS |
1314 | if (bpi->extra |
1315 | && decode_rd_type(bpi->extra->vnc.import.rd.val) | |
d62a17ae | 1316 | == RD_TYPE_VNC_ETH) { |
1317 | /* ethernet */ | |
1318 | ||
1319 | struct rfapi_vn_option *vo; | |
1320 | ||
1321 | vo = XCALLOC(MTYPE_RFAPI_VN_OPTION, | |
1322 | sizeof(struct rfapi_vn_option)); | |
1323 | assert(vo); | |
1324 | ||
1325 | vo->type = RFAPI_VN_OPTION_TYPE_L2ADDR; | |
1326 | ||
1327 | memcpy(&vo->v.l2addr.macaddr, &rn->p.u.prefix_eth.octet, | |
28328ea9 | 1328 | ETH_ALEN); |
d62a17ae | 1329 | /* only low 3 bytes of this are significant */ |
40381db7 | 1330 | if (bpi->attr) { |
d62a17ae | 1331 | (void)rfapiEcommunityGetLNI( |
40381db7 | 1332 | bpi->attr->ecommunity, |
d62a17ae | 1333 | &vo->v.l2addr.logical_net_id); |
1334 | (void)rfapiEcommunityGetEthernetTag( | |
40381db7 | 1335 | bpi->attr->ecommunity, &vo->v.l2addr.tag_id); |
d62a17ae | 1336 | } |
1337 | ||
1338 | /* local_nve_id comes from lower byte of RD type */ | |
40381db7 | 1339 | vo->v.l2addr.local_nve_id = bpi->extra->vnc.import.rd.val[1]; |
d62a17ae | 1340 | |
1341 | /* label comes from MP_REACH_NLRI label */ | |
40381db7 | 1342 | vo->v.l2addr.label = decode_label(&bpi->extra->label[0]); |
d62a17ae | 1343 | |
1344 | new->vn_options = vo; | |
1345 | ||
1346 | /* | |
1347 | * If there is an auxiliary prefix (i.e., host IP address), | |
1348 | * use it as the nexthop prefix instead of the query prefix | |
1349 | */ | |
40381db7 DS |
1350 | if (bpi->extra->vnc.import.aux_prefix.family) { |
1351 | rfapiQprefix2Rprefix(&bpi->extra->vnc.import.aux_prefix, | |
d62a17ae | 1352 | &new->prefix); |
1353 | } | |
1354 | } | |
1355 | ||
40381db7 | 1356 | if (bpi->attr) { |
d62a17ae | 1357 | bgp_encap_types tun_type; |
40381db7 | 1358 | new->prefix.cost = rfapiRfpCost(bpi->attr); |
d62a17ae | 1359 | |
1360 | struct bgp_attr_encap_subtlv *pEncap; | |
1361 | ||
40381db7 | 1362 | switch (BGP_MP_NEXTHOP_FAMILY(bpi->attr->mp_nexthop_len)) { |
d62a17ae | 1363 | case AF_INET: |
1364 | new->vn_address.addr_family = AF_INET; | |
1365 | new->vn_address.addr.v4 = | |
40381db7 | 1366 | bpi->attr->mp_nexthop_global_in; |
d62a17ae | 1367 | break; |
1368 | ||
1369 | case AF_INET6: | |
1370 | new->vn_address.addr_family = AF_INET6; | |
40381db7 | 1371 | new->vn_address.addr.v6 = bpi->attr->mp_nexthop_global; |
d62a17ae | 1372 | break; |
1373 | ||
1374 | default: | |
1375 | zlog_warn("%s: invalid vpn nexthop length: %d", | |
40381db7 | 1376 | __func__, bpi->attr->mp_nexthop_len); |
d62a17ae | 1377 | rfapi_free_next_hop_list(new); |
1378 | return NULL; | |
1379 | } | |
1380 | ||
40381db7 | 1381 | for (pEncap = bpi->attr->vnc_subtlvs; pEncap; |
d62a17ae | 1382 | pEncap = pEncap->next) { |
1383 | switch (pEncap->type) { | |
1384 | case BGP_VNC_SUBTLV_TYPE_LIFETIME: | |
1385 | /* use configured lifetime, not attr lifetime */ | |
1386 | break; | |
1387 | ||
1388 | default: | |
1389 | zlog_warn("%s: unknown VNC option type %d", | |
1390 | __func__, pEncap->type); | |
1391 | ||
1392 | ||
1393 | break; | |
1394 | } | |
1395 | } | |
1396 | ||
40381db7 | 1397 | rfapiGetTunnelType(bpi->attr, &tun_type); |
d62a17ae | 1398 | if (tun_type == BGP_ENCAP_TYPE_MPLS) { |
1399 | struct prefix p; | |
1400 | /* MPLS carries UN address in next hop */ | |
40381db7 | 1401 | rfapiNexthop2Prefix(bpi->attr, &p); |
d62a17ae | 1402 | if (p.family != 0) { |
1403 | rfapiQprefix2Raddr(&p, &new->un_address); | |
1404 | have_vnc_tunnel_un = 1; | |
1405 | } | |
1406 | } | |
1407 | ||
40381db7 | 1408 | for (pEncap = bpi->attr->encap_subtlvs; pEncap; |
d62a17ae | 1409 | pEncap = pEncap->next) { |
1410 | switch (pEncap->type) { | |
1411 | case BGP_ENCAP_SUBTLV_TYPE_REMOTE_ENDPOINT: | |
1412 | /* | |
1413 | * Overrides ENCAP UN address, if any | |
1414 | */ | |
1415 | switch (pEncap->length) { | |
1416 | ||
1417 | case 8: | |
1418 | new->un_address.addr_family = AF_INET; | |
1419 | memcpy(&new->un_address.addr.v4, | |
1420 | pEncap->value, 4); | |
1421 | have_vnc_tunnel_un = 1; | |
1422 | break; | |
1423 | ||
1424 | case 20: | |
1425 | new->un_address.addr_family = AF_INET6; | |
1426 | memcpy(&new->un_address.addr.v6, | |
1427 | pEncap->value, 16); | |
1428 | have_vnc_tunnel_un = 1; | |
1429 | break; | |
1430 | ||
1431 | default: | |
1432 | zlog_warn( | |
40381db7 DS |
1433 | "%s: invalid tunnel subtlv UN addr length (%d) for bpi %p", |
1434 | __func__, pEncap->length, bpi); | |
d62a17ae | 1435 | } |
1436 | break; | |
1437 | ||
1438 | default: | |
1439 | zlog_warn( | |
1440 | "%s: unknown Encap Attribute option type %d", | |
1441 | __func__, pEncap->type); | |
1442 | ||
1443 | ||
1444 | break; | |
1445 | } | |
1446 | } | |
1447 | ||
40381db7 | 1448 | new->un_options = rfapi_encap_tlv_to_un_option(bpi->attr); |
65efcfce LB |
1449 | |
1450 | #if DEBUG_ENCAP_MONITOR | |
d62a17ae | 1451 | vnc_zlog_debug_verbose("%s: line %d: have_vnc_tunnel_un=%d", |
1452 | __func__, __LINE__, have_vnc_tunnel_un); | |
65efcfce LB |
1453 | #endif |
1454 | ||
40381db7 | 1455 | if (!have_vnc_tunnel_un && bpi->extra) { |
d62a17ae | 1456 | /* |
1457 | * use cached UN address from ENCAP route | |
1458 | */ | |
1459 | new->un_address.addr_family = | |
40381db7 | 1460 | bpi->extra->vnc.import.un_family; |
d62a17ae | 1461 | switch (new->un_address.addr_family) { |
1462 | case AF_INET: | |
1463 | new->un_address.addr.v4 = | |
40381db7 | 1464 | bpi->extra->vnc.import.un.addr4; |
d62a17ae | 1465 | break; |
1466 | case AF_INET6: | |
1467 | new->un_address.addr.v6 = | |
40381db7 | 1468 | bpi->extra->vnc.import.un.addr6; |
d62a17ae | 1469 | break; |
1470 | default: | |
1471 | zlog_warn( | |
40381db7 | 1472 | "%s: invalid UN addr family (%d) for bpi %p", |
d62a17ae | 1473 | __func__, new->un_address.addr_family, |
40381db7 | 1474 | bpi); |
d62a17ae | 1475 | rfapi_free_next_hop_list(new); |
1476 | return NULL; | |
1477 | break; | |
1478 | } | |
1479 | } | |
1480 | } | |
1481 | ||
1482 | new->lifetime = lifetime; | |
1483 | return new; | |
65efcfce LB |
1484 | } |
1485 | ||
fe08ba7e | 1486 | int rfapiHasNonRemovedRoutes(struct agg_node *rn) |
65efcfce | 1487 | { |
40381db7 | 1488 | struct bgp_path_info *bpi; |
65efcfce | 1489 | |
40381db7 | 1490 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 1491 | struct prefix pfx; |
65efcfce | 1492 | |
40381db7 DS |
1493 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
1494 | && (bpi->extra && !rfapiGetUnAddrOfVpnBi(bpi, &pfx))) { | |
65efcfce | 1495 | |
d62a17ae | 1496 | return 1; |
1497 | } | |
1498 | } | |
1499 | return 0; | |
65efcfce LB |
1500 | } |
1501 | ||
1502 | #if DEBUG_IT_NODES | |
d62a17ae | 1503 | /* |
65efcfce LB |
1504 | * DEBUG FUNCTION |
1505 | */ | |
fe08ba7e | 1506 | void rfapiDumpNode(struct agg_node *rn) |
65efcfce | 1507 | { |
40381db7 | 1508 | struct bgp_path_info *bpi; |
d62a17ae | 1509 | |
1510 | vnc_zlog_debug_verbose("%s: rn=%p", __func__, rn); | |
40381db7 | 1511 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 1512 | struct prefix pfx; |
40381db7 | 1513 | int ctrc = rfapiGetUnAddrOfVpnBi(bpi, &pfx); |
d62a17ae | 1514 | int nr; |
1515 | ||
40381db7 DS |
1516 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
1517 | && (bpi->extra && !ctrc)) { | |
d62a17ae | 1518 | |
1519 | nr = 1; | |
1520 | } else { | |
1521 | nr = 0; | |
1522 | } | |
1523 | ||
1524 | vnc_zlog_debug_verbose( | |
40381db7 DS |
1525 | " bpi=%p, nr=%d, flags=0x%x, extra=%p, ctrc=%d", bpi, |
1526 | nr, bpi->flags, bpi->extra, ctrc); | |
d62a17ae | 1527 | } |
65efcfce LB |
1528 | } |
1529 | #endif | |
1530 | ||
d62a17ae | 1531 | static int rfapiNhlAddNodeRoutes( |
fe08ba7e | 1532 | struct agg_node *rn, /* in */ |
d62a17ae | 1533 | struct rfapi_ip_prefix *rprefix, /* in */ |
1534 | uint32_t lifetime, /* in */ | |
1535 | int removed, /* in */ | |
1536 | struct rfapi_next_hop_entry **head, /* in/out */ | |
1537 | struct rfapi_next_hop_entry **tail, /* in/out */ | |
1538 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
fe08ba7e | 1539 | struct agg_node *rfd_rib_node, /* preload this NVE rib node */ |
d62a17ae | 1540 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1541 | { |
40381db7 | 1542 | struct bgp_path_info *bpi; |
d62a17ae | 1543 | struct rfapi_next_hop_entry *new; |
1544 | struct prefix pfx_un; | |
1545 | struct skiplist *seen_nexthops; | |
1546 | int count = 0; | |
1547 | int is_l2 = (rn->p.family == AF_ETHERNET); | |
1548 | ||
fe08ba7e DS |
1549 | if (rfd_rib_node) { |
1550 | struct agg_table *atable = agg_get_table(rfd_rib_node); | |
84cc1207 PZ |
1551 | struct rfapi_descriptor *rfd; |
1552 | ||
fe08ba7e DS |
1553 | if (atable) { |
1554 | rfd = agg_get_table_info(atable); | |
84cc1207 | 1555 | |
fe08ba7e DS |
1556 | if (rfapiRibFTDFilterRecentPrefix(rfd, rn, |
1557 | pfx_target_original)) | |
1558 | return 0; | |
1559 | } | |
d62a17ae | 1560 | } |
1561 | ||
1562 | seen_nexthops = | |
1563 | skiplist_new(0, vnc_prefix_cmp, (void (*)(void *))prefix_free); | |
1564 | ||
40381db7 | 1565 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 1566 | |
1567 | struct prefix pfx_vn; | |
1568 | struct prefix *newpfx; | |
1569 | ||
40381db7 | 1570 | if (removed && !CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
65efcfce | 1571 | #if DEBUG_RETURNED_NHL |
d62a17ae | 1572 | vnc_zlog_debug_verbose( |
1573 | "%s: want holddown, this route not holddown, skip", | |
1574 | __func__); | |
65efcfce | 1575 | #endif |
d62a17ae | 1576 | continue; |
1577 | } | |
40381db7 | 1578 | if (!removed && CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
d62a17ae | 1579 | continue; |
1580 | } | |
1581 | ||
40381db7 | 1582 | if (!bpi->extra) { |
d62a17ae | 1583 | continue; |
1584 | } | |
1585 | ||
1586 | /* | |
1587 | * Check for excluded VN address | |
1588 | */ | |
40381db7 | 1589 | if (rfapiVpnBiNhEqualsPt(bpi, exclude_vnaddr)) |
d62a17ae | 1590 | continue; |
1591 | ||
1592 | /* | |
1593 | * Check for VN address (nexthop) copied already | |
1594 | */ | |
1595 | if (is_l2) { | |
1596 | /* L2 routes: semantic nexthop in aux_prefix; VN addr | |
1597 | * ain't it */ | |
40381db7 | 1598 | pfx_vn = bpi->extra->vnc.import.aux_prefix; |
d62a17ae | 1599 | } else { |
40381db7 | 1600 | rfapiNexthop2Prefix(bpi->attr, &pfx_vn); |
d62a17ae | 1601 | } |
1602 | if (!skiplist_search(seen_nexthops, &pfx_vn, NULL)) { | |
65efcfce | 1603 | #if DEBUG_RETURNED_NHL |
872ed4c7 | 1604 | char buf[PREFIX_STRLEN]; |
65efcfce | 1605 | |
872ed4c7 | 1606 | prefix2str(&pfx_vn, buf, sizeof(buf)); |
d62a17ae | 1607 | vnc_zlog_debug_verbose( |
1608 | "%s: already put VN/nexthop %s, skip", __func__, | |
1609 | buf); | |
65efcfce | 1610 | #endif |
d62a17ae | 1611 | continue; |
1612 | } | |
65efcfce | 1613 | |
40381db7 | 1614 | if (rfapiGetUnAddrOfVpnBi(bpi, &pfx_un)) { |
65efcfce | 1615 | #if DEBUG_ENCAP_MONITOR |
d62a17ae | 1616 | vnc_zlog_debug_verbose( |
40381db7 | 1617 | "%s: failed to get UN address of this VPN bpi", |
d62a17ae | 1618 | __func__); |
65efcfce | 1619 | #endif |
d62a17ae | 1620 | continue; |
1621 | } | |
1622 | ||
1623 | newpfx = prefix_new(); | |
1624 | *newpfx = pfx_vn; | |
1625 | skiplist_insert(seen_nexthops, newpfx, newpfx); | |
1626 | ||
40381db7 | 1627 | new = rfapiRouteInfo2NextHopEntry(rprefix, bpi, lifetime, rn); |
d62a17ae | 1628 | if (new) { |
1629 | if (rfapiRibPreloadBi(rfd_rib_node, &pfx_vn, &pfx_un, | |
40381db7 | 1630 | lifetime, bpi)) { |
d62a17ae | 1631 | /* duplicate filtered by RIB */ |
1632 | rfapi_free_next_hop_list(new); | |
1633 | new = NULL; | |
1634 | } | |
1635 | } | |
1636 | ||
1637 | if (new) { | |
1638 | if (*tail) { | |
1639 | (*tail)->next = new; | |
1640 | } else { | |
1641 | *head = new; | |
1642 | } | |
1643 | *tail = new; | |
1644 | ++count; | |
1645 | } | |
1646 | } | |
1647 | ||
1648 | skiplist_free(seen_nexthops); | |
1649 | ||
1650 | return count; | |
65efcfce LB |
1651 | } |
1652 | ||
1653 | ||
1654 | /* | |
1655 | * Breadth-first | |
1656 | * | |
1657 | * omit_node is meant for the situation where we are adding a subtree | |
1658 | * of a parent of some original requested node. The response already | |
1659 | * contains the original requested node, and we don't want to duplicate | |
1660 | * its routes in the list, so we skip it if the right or left node | |
1661 | * matches (of course, we still travel down its child subtrees). | |
1662 | */ | |
d62a17ae | 1663 | static int rfapiNhlAddSubtree( |
fe08ba7e | 1664 | struct agg_node *rn, /* in */ |
d62a17ae | 1665 | uint32_t lifetime, /* in */ |
1666 | struct rfapi_next_hop_entry **head, /* in/out */ | |
1667 | struct rfapi_next_hop_entry **tail, /* in/out */ | |
fe08ba7e | 1668 | struct agg_node *omit_node, /* in */ |
d62a17ae | 1669 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ |
fe08ba7e | 1670 | struct agg_table *rfd_rib_table, /* preload here */ |
d62a17ae | 1671 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1672 | { |
d62a17ae | 1673 | struct rfapi_ip_prefix rprefix; |
1674 | int rcount = 0; | |
1675 | ||
1676 | /* FIXME: need to find a better way here to work without sticking our | |
1677 | * hands in node->link */ | |
fe08ba7e DS |
1678 | if (agg_node_left(rn) && agg_node_left(rn) != omit_node) { |
1679 | if (agg_node_left(rn)->info) { | |
d62a17ae | 1680 | int count = 0; |
fe08ba7e | 1681 | struct agg_node *rib_rn = NULL; |
d62a17ae | 1682 | |
fe08ba7e | 1683 | rfapiQprefix2Rprefix(&agg_node_left(rn)->p, &rprefix); |
d62a17ae | 1684 | if (rfd_rib_table) { |
fe08ba7e DS |
1685 | rib_rn = agg_node_get(rfd_rib_table, |
1686 | &agg_node_left(rn)->p); | |
d62a17ae | 1687 | } |
1688 | ||
1689 | count = rfapiNhlAddNodeRoutes( | |
fe08ba7e DS |
1690 | agg_node_left(rn), &rprefix, lifetime, 0, head, |
1691 | tail, exclude_vnaddr, rib_rn, | |
1692 | pfx_target_original); | |
d62a17ae | 1693 | if (!count) { |
1694 | count = rfapiNhlAddNodeRoutes( | |
fe08ba7e DS |
1695 | agg_node_left(rn), &rprefix, lifetime, |
1696 | 1, head, tail, exclude_vnaddr, rib_rn, | |
d62a17ae | 1697 | pfx_target_original); |
1698 | } | |
1699 | rcount += count; | |
1700 | if (rib_rn) | |
fe08ba7e | 1701 | agg_unlock_node(rib_rn); |
d62a17ae | 1702 | } |
1703 | } | |
1704 | ||
fe08ba7e DS |
1705 | if (agg_node_right(rn) && agg_node_right(rn) != omit_node) { |
1706 | if (agg_node_right(rn)->info) { | |
d62a17ae | 1707 | int count = 0; |
fe08ba7e | 1708 | struct agg_node *rib_rn = NULL; |
d62a17ae | 1709 | |
fe08ba7e | 1710 | rfapiQprefix2Rprefix(&agg_node_right(rn)->p, &rprefix); |
d62a17ae | 1711 | if (rfd_rib_table) { |
fe08ba7e DS |
1712 | rib_rn = agg_node_get(rfd_rib_table, |
1713 | &agg_node_right(rn)->p); | |
d62a17ae | 1714 | } |
1715 | count = rfapiNhlAddNodeRoutes( | |
fe08ba7e DS |
1716 | agg_node_right(rn), &rprefix, lifetime, 0, head, |
1717 | tail, exclude_vnaddr, rib_rn, | |
1718 | pfx_target_original); | |
d62a17ae | 1719 | if (!count) { |
1720 | count = rfapiNhlAddNodeRoutes( | |
fe08ba7e DS |
1721 | agg_node_right(rn), &rprefix, lifetime, |
1722 | 1, head, tail, exclude_vnaddr, rib_rn, | |
d62a17ae | 1723 | pfx_target_original); |
1724 | } | |
1725 | rcount += count; | |
1726 | if (rib_rn) | |
fe08ba7e | 1727 | agg_unlock_node(rib_rn); |
d62a17ae | 1728 | } |
1729 | } | |
1730 | ||
fe08ba7e | 1731 | if (agg_node_left(rn)) { |
d62a17ae | 1732 | rcount += rfapiNhlAddSubtree( |
fe08ba7e | 1733 | agg_node_left(rn), lifetime, head, tail, omit_node, |
d62a17ae | 1734 | exclude_vnaddr, rfd_rib_table, pfx_target_original); |
1735 | } | |
fe08ba7e | 1736 | if (agg_node_right(rn)) { |
d62a17ae | 1737 | rcount += rfapiNhlAddSubtree( |
fe08ba7e | 1738 | agg_node_right(rn), lifetime, head, tail, omit_node, |
d62a17ae | 1739 | exclude_vnaddr, rfd_rib_table, pfx_target_original); |
1740 | } | |
1741 | ||
1742 | return rcount; | |
65efcfce LB |
1743 | } |
1744 | ||
1745 | /* | |
1746 | * Implementation of ROUTE_LIST(node) from RFAPI-Import-Event-Handling.txt | |
1747 | * | |
1748 | * Construct an rfapi nexthop list based on the routes attached to | |
1749 | * the specified node. | |
1750 | * | |
1defdda8 DS |
1751 | * If there are any routes that do NOT have BGP_PATH_REMOVED set, |
1752 | * return those only. If there are ONLY routes with BGP_PATH_REMOVED, | |
65efcfce LB |
1753 | * then return those, and also include all the non-removed routes from the |
1754 | * next less-specific node (i.e., this node's parent) at the end. | |
1755 | */ | |
d62a17ae | 1756 | struct rfapi_next_hop_entry *rfapiRouteNode2NextHopList( |
fe08ba7e DS |
1757 | struct agg_node *rn, uint32_t lifetime, /* put into nexthop entries */ |
1758 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
1759 | struct agg_table *rfd_rib_table, /* preload here */ | |
1760 | struct prefix *pfx_target_original) /* query target */ | |
65efcfce | 1761 | { |
d62a17ae | 1762 | struct rfapi_ip_prefix rprefix; |
1763 | struct rfapi_next_hop_entry *answer = NULL; | |
1764 | struct rfapi_next_hop_entry *last = NULL; | |
fe08ba7e | 1765 | struct agg_node *parent; |
d62a17ae | 1766 | int count = 0; |
fe08ba7e | 1767 | struct agg_node *rib_rn; |
65efcfce LB |
1768 | |
1769 | #if DEBUG_RETURNED_NHL | |
d62a17ae | 1770 | { |
872ed4c7 | 1771 | char buf[PREFIX_STRLEN]; |
d62a17ae | 1772 | |
872ed4c7 | 1773 | prefix2str(&rn->p, buf, sizeof(buf)); |
d62a17ae | 1774 | vnc_zlog_debug_verbose("%s: called with node pfx=%s", __func__, |
1775 | buf); | |
1776 | } | |
1777 | rfapiDebugBacktrace(); | |
65efcfce LB |
1778 | #endif |
1779 | ||
d62a17ae | 1780 | rfapiQprefix2Rprefix(&rn->p, &rprefix); |
1781 | ||
fe08ba7e | 1782 | rib_rn = rfd_rib_table ? agg_node_get(rfd_rib_table, &rn->p) : NULL; |
d62a17ae | 1783 | |
1784 | /* | |
1785 | * Add non-withdrawn routes at this node | |
1786 | */ | |
1787 | count = rfapiNhlAddNodeRoutes(rn, &rprefix, lifetime, 0, &answer, &last, | |
1788 | exclude_vnaddr, rib_rn, | |
1789 | pfx_target_original); | |
1790 | ||
1791 | /* | |
1792 | * If the list has at least one entry, it's finished | |
1793 | */ | |
1794 | if (count) { | |
1795 | count += rfapiNhlAddSubtree(rn, lifetime, &answer, &last, NULL, | |
1796 | exclude_vnaddr, rfd_rib_table, | |
1797 | pfx_target_original); | |
1798 | vnc_zlog_debug_verbose("%s: %d nexthops, answer=%p", __func__, | |
1799 | count, answer); | |
65efcfce | 1800 | #if DEBUG_RETURNED_NHL |
d62a17ae | 1801 | rfapiPrintNhl(NULL, answer); |
65efcfce | 1802 | #endif |
d62a17ae | 1803 | if (rib_rn) |
fe08ba7e | 1804 | agg_unlock_node(rib_rn); |
d62a17ae | 1805 | return answer; |
1806 | } | |
1807 | ||
1808 | /* | |
1809 | * Add withdrawn routes at this node | |
1810 | */ | |
1811 | count = rfapiNhlAddNodeRoutes(rn, &rprefix, lifetime, 1, &answer, &last, | |
1812 | exclude_vnaddr, rib_rn, | |
1813 | pfx_target_original); | |
1814 | if (rib_rn) | |
fe08ba7e | 1815 | agg_unlock_node(rib_rn); |
d62a17ae | 1816 | |
1817 | // rfapiPrintNhl(NULL, answer); | |
1818 | ||
1819 | /* | |
1820 | * walk up the tree until we find a node with non-deleted | |
1821 | * routes, then add them | |
1822 | */ | |
fe08ba7e DS |
1823 | for (parent = agg_node_parent(rn); parent; |
1824 | parent = agg_node_parent(parent)) { | |
d62a17ae | 1825 | if (rfapiHasNonRemovedRoutes(parent)) { |
1826 | break; | |
1827 | } | |
1828 | } | |
1829 | ||
1830 | /* | |
1831 | * Add non-withdrawn routes from less-specific prefix | |
1832 | */ | |
1833 | if (parent) { | |
fe08ba7e DS |
1834 | rib_rn = rfd_rib_table ? agg_node_get(rfd_rib_table, &parent->p) |
1835 | : NULL; | |
d62a17ae | 1836 | rfapiQprefix2Rprefix(&parent->p, &rprefix); |
1837 | count += rfapiNhlAddNodeRoutes(parent, &rprefix, lifetime, 0, | |
1838 | &answer, &last, exclude_vnaddr, | |
1839 | rib_rn, pfx_target_original); | |
1840 | count += rfapiNhlAddSubtree(parent, lifetime, &answer, &last, | |
1841 | rn, exclude_vnaddr, rfd_rib_table, | |
1842 | pfx_target_original); | |
1843 | if (rib_rn) | |
fe08ba7e | 1844 | agg_unlock_node(rib_rn); |
d62a17ae | 1845 | } else { |
1846 | /* | |
1847 | * There is no parent with non-removed routes. Still need to | |
1848 | * add subtree of original node if it contributed routes to the | |
1849 | * answer. | |
1850 | */ | |
1851 | if (count) | |
1852 | count += rfapiNhlAddSubtree(rn, lifetime, &answer, | |
1853 | &last, rn, exclude_vnaddr, | |
1854 | rfd_rib_table, | |
1855 | pfx_target_original); | |
1856 | } | |
1857 | ||
1858 | vnc_zlog_debug_verbose("%s: %d nexthops, answer=%p", __func__, count, | |
1859 | answer); | |
65efcfce | 1860 | #if DEBUG_RETURNED_NHL |
d62a17ae | 1861 | rfapiPrintNhl(NULL, answer); |
65efcfce | 1862 | #endif |
d62a17ae | 1863 | return answer; |
65efcfce LB |
1864 | } |
1865 | ||
1866 | /* | |
1867 | * Construct nexthop list of all routes in table | |
1868 | */ | |
d62a17ae | 1869 | struct rfapi_next_hop_entry *rfapiRouteTable2NextHopList( |
fe08ba7e DS |
1870 | struct agg_table *rt, uint32_t lifetime, /* put into nexthop entries */ |
1871 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
1872 | struct agg_table *rfd_rib_table, /* preload this NVE rib table */ | |
1873 | struct prefix *pfx_target_original) /* query target */ | |
65efcfce | 1874 | { |
fe08ba7e | 1875 | struct agg_node *rn; |
d62a17ae | 1876 | struct rfapi_next_hop_entry *biglist = NULL; |
1877 | struct rfapi_next_hop_entry *nhl; | |
1878 | struct rfapi_next_hop_entry *tail = NULL; | |
1879 | int count = 0; | |
1880 | ||
fe08ba7e | 1881 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
d62a17ae | 1882 | |
1883 | nhl = rfapiRouteNode2NextHopList(rn, lifetime, exclude_vnaddr, | |
1884 | rfd_rib_table, | |
1885 | pfx_target_original); | |
1886 | if (!tail) { | |
1887 | tail = biglist = nhl; | |
1888 | if (tail) | |
1889 | count = 1; | |
1890 | } else { | |
1891 | tail->next = nhl; | |
1892 | } | |
1893 | if (tail) { | |
1894 | while (tail->next) { | |
1895 | ++count; | |
1896 | tail = tail->next; | |
1897 | } | |
1898 | } | |
1899 | } | |
1900 | ||
1901 | vnc_zlog_debug_verbose("%s: returning %d routes", __func__, count); | |
1902 | return biglist; | |
65efcfce LB |
1903 | } |
1904 | ||
d62a17ae | 1905 | struct rfapi_next_hop_entry *rfapiEthRouteNode2NextHopList( |
fe08ba7e | 1906 | struct agg_node *rn, struct rfapi_ip_prefix *rprefix, |
d62a17ae | 1907 | uint32_t lifetime, /* put into nexthop entries */ |
1908 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
fe08ba7e | 1909 | struct agg_table *rfd_rib_table, /* preload NVE rib table */ |
d62a17ae | 1910 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1911 | { |
d62a17ae | 1912 | int count = 0; |
1913 | struct rfapi_next_hop_entry *answer = NULL; | |
1914 | struct rfapi_next_hop_entry *last = NULL; | |
fe08ba7e | 1915 | struct agg_node *rib_rn; |
65efcfce | 1916 | |
fe08ba7e | 1917 | rib_rn = rfd_rib_table ? agg_node_get(rfd_rib_table, &rn->p) : NULL; |
65efcfce | 1918 | |
d62a17ae | 1919 | count = rfapiNhlAddNodeRoutes(rn, rprefix, lifetime, 0, &answer, &last, |
1920 | NULL, rib_rn, pfx_target_original); | |
65efcfce LB |
1921 | |
1922 | #if DEBUG_ENCAP_MONITOR | |
d62a17ae | 1923 | vnc_zlog_debug_verbose("%s: node %p: %d non-holddown routes", __func__, |
1924 | rn, count); | |
65efcfce LB |
1925 | #endif |
1926 | ||
d62a17ae | 1927 | if (!count) { |
1928 | count = rfapiNhlAddNodeRoutes(rn, rprefix, lifetime, 1, &answer, | |
1929 | &last, exclude_vnaddr, rib_rn, | |
1930 | pfx_target_original); | |
1931 | vnc_zlog_debug_verbose("%s: node %p: %d holddown routes", | |
1932 | __func__, rn, count); | |
1933 | } | |
65efcfce | 1934 | |
d62a17ae | 1935 | if (rib_rn) |
fe08ba7e | 1936 | agg_unlock_node(rib_rn); |
65efcfce LB |
1937 | |
1938 | #if DEBUG_RETURNED_NHL | |
d62a17ae | 1939 | rfapiPrintNhl(NULL, answer); |
65efcfce LB |
1940 | #endif |
1941 | ||
d62a17ae | 1942 | return answer; |
65efcfce LB |
1943 | } |
1944 | ||
1945 | ||
1946 | /* | |
1947 | * Construct nexthop list of all routes in table | |
1948 | */ | |
d62a17ae | 1949 | struct rfapi_next_hop_entry *rfapiEthRouteTable2NextHopList( |
1950 | uint32_t logical_net_id, struct rfapi_ip_prefix *rprefix, | |
1951 | uint32_t lifetime, /* put into nexthop entries */ | |
1952 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
fe08ba7e | 1953 | struct agg_table *rfd_rib_table, /* preload NVE rib node */ |
d62a17ae | 1954 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1955 | { |
d62a17ae | 1956 | struct rfapi_import_table *it; |
1957 | struct bgp *bgp = bgp_get_default(); | |
fe08ba7e DS |
1958 | struct agg_table *rt; |
1959 | struct agg_node *rn; | |
d62a17ae | 1960 | struct rfapi_next_hop_entry *biglist = NULL; |
1961 | struct rfapi_next_hop_entry *nhl; | |
1962 | struct rfapi_next_hop_entry *tail = NULL; | |
1963 | int count = 0; | |
1964 | ||
1965 | ||
1966 | it = rfapiMacImportTableGet(bgp, logical_net_id); | |
1967 | rt = it->imported_vpn[AFI_L2VPN]; | |
1968 | ||
fe08ba7e | 1969 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
d62a17ae | 1970 | |
1971 | nhl = rfapiEthRouteNode2NextHopList( | |
1972 | rn, rprefix, lifetime, exclude_vnaddr, rfd_rib_table, | |
1973 | pfx_target_original); | |
1974 | if (!tail) { | |
1975 | tail = biglist = nhl; | |
1976 | if (tail) | |
1977 | count = 1; | |
1978 | } else { | |
1979 | tail->next = nhl; | |
1980 | } | |
1981 | if (tail) { | |
1982 | while (tail->next) { | |
1983 | ++count; | |
1984 | tail = tail->next; | |
1985 | } | |
1986 | } | |
1987 | } | |
1988 | ||
1989 | vnc_zlog_debug_verbose("%s: returning %d routes", __func__, count); | |
1990 | return biglist; | |
65efcfce LB |
1991 | } |
1992 | ||
1993 | /* | |
40381db7 DS |
1994 | * Insert a new bpi to the imported route table node, |
1995 | * keeping the list of BPIs sorted best route first | |
65efcfce | 1996 | */ |
fe08ba7e | 1997 | static void rfapiBgpInfoAttachSorted(struct agg_node *rn, |
4b7e6066 | 1998 | struct bgp_path_info *info_new, afi_t afi, |
d62a17ae | 1999 | safi_t safi) |
65efcfce | 2000 | { |
d62a17ae | 2001 | struct bgp *bgp; |
4b7e6066 DS |
2002 | struct bgp_path_info *prev; |
2003 | struct bgp_path_info *next; | |
d62a17ae | 2004 | char pfx_buf[PREFIX2STR_BUFFER]; |
2005 | ||
2006 | ||
2007 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
2008 | ||
2009 | if (VNC_DEBUG(IMPORT_BI_ATTACH)) { | |
2010 | vnc_zlog_debug_verbose("%s: info_new->peer=%p", __func__, | |
2011 | info_new->peer); | |
2012 | vnc_zlog_debug_verbose("%s: info_new->peer->su_remote=%p", | |
2013 | __func__, info_new->peer->su_remote); | |
2014 | } | |
2015 | ||
2016 | for (prev = NULL, next = rn->info; next; | |
2017 | prev = next, next = next->next) { | |
1defdda8 DS |
2018 | if (!bgp |
2019 | || (!CHECK_FLAG(info_new->flags, BGP_PATH_REMOVED) | |
2020 | && CHECK_FLAG(next->flags, BGP_PATH_REMOVED)) | |
18ee8310 DS |
2021 | || bgp_path_info_cmp_compatible(bgp, info_new, next, |
2022 | pfx_buf, afi, safi) | |
d62a17ae | 2023 | == -1) { /* -1 if 1st is better */ |
2024 | break; | |
2025 | } | |
2026 | } | |
2027 | vnc_zlog_debug_verbose("%s: prev=%p, next=%p", __func__, prev, next); | |
2028 | if (prev) { | |
2029 | prev->next = info_new; | |
2030 | } else { | |
2031 | rn->info = info_new; | |
2032 | } | |
2033 | info_new->prev = prev; | |
2034 | info_new->next = next; | |
2035 | if (next) | |
2036 | next->prev = info_new; | |
2037 | bgp_attr_intern(info_new->attr); | |
65efcfce LB |
2038 | } |
2039 | ||
40381db7 | 2040 | static void rfapiBgpInfoDetach(struct agg_node *rn, struct bgp_path_info *bpi) |
65efcfce | 2041 | { |
d62a17ae | 2042 | /* |
2043 | * Remove the route (doubly-linked) | |
2044 | */ | |
40381db7 DS |
2045 | // bgp_attr_unintern (&bpi->attr); |
2046 | if (bpi->next) | |
2047 | bpi->next->prev = bpi->prev; | |
2048 | if (bpi->prev) | |
2049 | bpi->prev->next = bpi->next; | |
d62a17ae | 2050 | else |
40381db7 | 2051 | rn->info = bpi->next; |
65efcfce LB |
2052 | } |
2053 | ||
2054 | /* | |
2055 | * For L3-indexed import tables | |
2056 | */ | |
d62a17ae | 2057 | static int rfapi_bi_peer_rd_cmp(void *b1, void *b2) |
65efcfce | 2058 | { |
40381db7 DS |
2059 | struct bgp_path_info *bpi1 = b1; |
2060 | struct bgp_path_info *bpi2 = b2; | |
d62a17ae | 2061 | |
2062 | /* | |
2063 | * Compare peers | |
2064 | */ | |
40381db7 | 2065 | if (bpi1->peer < bpi2->peer) |
d62a17ae | 2066 | return -1; |
40381db7 | 2067 | if (bpi1->peer > bpi2->peer) |
d62a17ae | 2068 | return 1; |
2069 | ||
2070 | /* | |
2071 | * compare RDs | |
2072 | */ | |
40381db7 DS |
2073 | return vnc_prefix_cmp((struct prefix *)&bpi1->extra->vnc.import.rd, |
2074 | (struct prefix *)&bpi2->extra->vnc.import.rd); | |
65efcfce LB |
2075 | } |
2076 | ||
2077 | /* | |
2078 | * For L2-indexed import tables | |
40381db7 | 2079 | * The BPIs in these tables should ALWAYS have an aux_prefix set because |
65efcfce LB |
2080 | * they arrive via IPv4 or IPv6 advertisements. |
2081 | */ | |
d62a17ae | 2082 | static int rfapi_bi_peer_rd_aux_cmp(void *b1, void *b2) |
65efcfce | 2083 | { |
40381db7 DS |
2084 | struct bgp_path_info *bpi1 = b1; |
2085 | struct bgp_path_info *bpi2 = b2; | |
d62a17ae | 2086 | int rc; |
2087 | ||
2088 | /* | |
2089 | * Compare peers | |
2090 | */ | |
40381db7 | 2091 | if (bpi1->peer < bpi2->peer) |
d62a17ae | 2092 | return -1; |
40381db7 | 2093 | if (bpi1->peer > bpi2->peer) |
d62a17ae | 2094 | return 1; |
2095 | ||
2096 | /* | |
2097 | * compare RDs | |
2098 | */ | |
40381db7 DS |
2099 | rc = vnc_prefix_cmp((struct prefix *)&bpi1->extra->vnc.import.rd, |
2100 | (struct prefix *)&bpi2->extra->vnc.import.rd); | |
d62a17ae | 2101 | if (rc) { |
2102 | return rc; | |
2103 | } | |
2104 | ||
2105 | /* | |
2106 | * L2 import tables can have multiple entries with the | |
2107 | * same MAC address, same RD, but different L3 addresses. | |
2108 | * | |
2109 | * Use presence of aux_prefix with AF=ethernet and prefixlen=1 | |
2110 | * as magic value to signify explicit wildcarding of the aux_prefix. | |
40381db7 DS |
2111 | * This magic value will not appear in bona fide bpi entries in |
2112 | * the import table, but is allowed in the "fake" bpi used to | |
d62a17ae | 2113 | * probe the table when searching. (We have to test both b1 and b2 |
2114 | * because there is no guarantee of the order the test key and | |
2115 | * the real key will be passed) | |
2116 | */ | |
40381db7 DS |
2117 | if ((bpi1->extra->vnc.import.aux_prefix.family == AF_ETHERNET |
2118 | && (bpi1->extra->vnc.import.aux_prefix.prefixlen == 1)) | |
2119 | || (bpi2->extra->vnc.import.aux_prefix.family == AF_ETHERNET | |
2120 | && (bpi2->extra->vnc.import.aux_prefix.prefixlen == 1))) { | |
d62a17ae | 2121 | |
2122 | /* | |
2123 | * wildcard aux address specified | |
2124 | */ | |
2125 | return 0; | |
2126 | } | |
2127 | ||
40381db7 DS |
2128 | return vnc_prefix_cmp(&bpi1->extra->vnc.import.aux_prefix, |
2129 | &bpi2->extra->vnc.import.aux_prefix); | |
65efcfce LB |
2130 | } |
2131 | ||
2132 | ||
2133 | /* | |
2134 | * Index on RD and Peer | |
2135 | */ | |
fe08ba7e | 2136 | static void rfapiItBiIndexAdd(struct agg_node *rn, /* Import table VPN node */ |
40381db7 | 2137 | struct bgp_path_info *bpi) /* new BPI */ |
65efcfce | 2138 | { |
d62a17ae | 2139 | struct skiplist *sl; |
2140 | ||
2141 | assert(rn); | |
40381db7 DS |
2142 | assert(bpi); |
2143 | assert(bpi->extra); | |
d62a17ae | 2144 | |
2145 | { | |
06b9f471 DS |
2146 | char buf[RD_ADDRSTRLEN]; |
2147 | ||
40381db7 DS |
2148 | vnc_zlog_debug_verbose("%s: bpi %p, peer %p, rd %s", __func__, |
2149 | bpi, bpi->peer, | |
2150 | prefix_rd2str(&bpi->extra->vnc.import.rd, | |
06b9f471 | 2151 | buf, sizeof(buf))); |
d62a17ae | 2152 | } |
2153 | ||
2154 | sl = RFAPI_RDINDEX_W_ALLOC(rn); | |
2155 | if (!sl) { | |
2156 | if (AF_ETHERNET == rn->p.family) { | |
2157 | sl = skiplist_new(0, rfapi_bi_peer_rd_aux_cmp, NULL); | |
2158 | } else { | |
2159 | sl = skiplist_new(0, rfapi_bi_peer_rd_cmp, NULL); | |
2160 | } | |
2161 | RFAPI_IT_EXTRA_GET(rn)->u.vpn.idx_rd = sl; | |
fe08ba7e | 2162 | agg_lock_node(rn); /* for skiplist */ |
d62a17ae | 2163 | } |
40381db7 | 2164 | assert(!skiplist_insert(sl, (void *)bpi, (void *)bpi)); |
fe08ba7e | 2165 | agg_lock_node(rn); /* for skiplist entry */ |
d62a17ae | 2166 | |
40381db7 | 2167 | /* NB: BPIs in import tables are not refcounted */ |
65efcfce LB |
2168 | } |
2169 | ||
fe08ba7e | 2170 | static void rfapiItBiIndexDump(struct agg_node *rn) |
65efcfce | 2171 | { |
d62a17ae | 2172 | struct skiplist *sl; |
2173 | void *cursor = NULL; | |
4b7e6066 DS |
2174 | struct bgp_path_info *k; |
2175 | struct bgp_path_info *v; | |
d62a17ae | 2176 | int rc; |
2177 | ||
2178 | sl = RFAPI_RDINDEX(rn); | |
2179 | if (!sl) | |
2180 | return; | |
2181 | ||
2182 | for (rc = skiplist_next(sl, (void **)&k, (void **)&v, &cursor); !rc; | |
2183 | rc = skiplist_next(sl, (void **)&k, (void **)&v, &cursor)) { | |
2184 | ||
06b9f471 | 2185 | char buf[RD_ADDRSTRLEN]; |
872ed4c7 | 2186 | char buf_aux_pfx[PREFIX_STRLEN]; |
d62a17ae | 2187 | |
06b9f471 | 2188 | prefix_rd2str(&k->extra->vnc.import.rd, buf, sizeof(buf)); |
d62a17ae | 2189 | if (k->extra->vnc.import.aux_prefix.family) { |
2190 | prefix2str(&k->extra->vnc.import.aux_prefix, | |
06b9f471 DS |
2191 | buf_aux_pfx, sizeof(buf_aux_pfx)); |
2192 | } else | |
872ed4c7 | 2193 | strncpy(buf_aux_pfx, "(none)", PREFIX_STRLEN); |
d62a17ae | 2194 | |
40381db7 | 2195 | vnc_zlog_debug_verbose("bpi %p, peer %p, rd %s, aux_prefix %s", |
d62a17ae | 2196 | k, k->peer, buf, buf_aux_pfx); |
2197 | } | |
65efcfce LB |
2198 | } |
2199 | ||
4b7e6066 | 2200 | static struct bgp_path_info *rfapiItBiIndexSearch( |
fe08ba7e | 2201 | struct agg_node *rn, /* Import table VPN node */ |
d62a17ae | 2202 | struct prefix_rd *prd, struct peer *peer, |
2203 | struct prefix *aux_prefix) /* optional L3 addr for L2 ITs */ | |
65efcfce | 2204 | { |
d62a17ae | 2205 | struct skiplist *sl; |
2206 | int rc; | |
40381db7 DS |
2207 | struct bgp_path_info bpi_fake; |
2208 | struct bgp_path_info_extra bpi_extra; | |
2209 | struct bgp_path_info *bpi_result; | |
65efcfce | 2210 | |
d62a17ae | 2211 | sl = RFAPI_RDINDEX(rn); |
2212 | if (!sl) | |
2213 | return NULL; | |
65efcfce LB |
2214 | |
2215 | #if DEBUG_BI_SEARCH | |
d62a17ae | 2216 | { |
06b9f471 | 2217 | char buf[RD_ADDRSTRLEN]; |
872ed4c7 | 2218 | char buf_aux_pfx[PREFIX_STRLEN]; |
d62a17ae | 2219 | |
d62a17ae | 2220 | if (aux_prefix) { |
872ed4c7 DS |
2221 | prefix2str(aux_prefix, buf_aux_pfx, |
2222 | sizeof(buf_aux_pfx)); | |
06b9f471 DS |
2223 | } else |
2224 | strncpy(buf_aux_pfx, "(nil)", sizeof(buf_aux_pfx)); | |
d62a17ae | 2225 | |
2226 | vnc_zlog_debug_verbose("%s want prd=%s, peer=%p, aux_prefix=%s", | |
06b9f471 DS |
2227 | __func__, |
2228 | prefix_rd2str(prd, buf, sizeof(buf)), | |
2229 | peer, buf_aux_pfx); | |
d62a17ae | 2230 | rfapiItBiIndexDump(rn); |
2231 | } | |
65efcfce LB |
2232 | #endif |
2233 | ||
d62a17ae | 2234 | /* threshold is a WAG */ |
2235 | if (sl->count < 3) { | |
65efcfce | 2236 | #if DEBUG_BI_SEARCH |
d62a17ae | 2237 | vnc_zlog_debug_verbose("%s: short list algorithm", __func__); |
65efcfce | 2238 | #endif |
d62a17ae | 2239 | /* if short list, linear search might be faster */ |
40381db7 DS |
2240 | for (bpi_result = rn->info; bpi_result; |
2241 | bpi_result = bpi_result->next) { | |
65efcfce | 2242 | #if DEBUG_BI_SEARCH |
d62a17ae | 2243 | { |
06b9f471 DS |
2244 | char buf[RD_ADDRSTRLEN]; |
2245 | ||
d62a17ae | 2246 | vnc_zlog_debug_verbose( |
40381db7 DS |
2247 | "%s: bpi has prd=%s, peer=%p", __func__, |
2248 | prefix_rd2str(&bpi_result->extra->vnc | |
996c9314 LB |
2249 | .import.rd, |
2250 | buf, sizeof(buf)), | |
40381db7 | 2251 | bpi_result->peer); |
d62a17ae | 2252 | } |
65efcfce | 2253 | #endif |
40381db7 DS |
2254 | if (peer == bpi_result->peer |
2255 | && !prefix_cmp((struct prefix *)&bpi_result->extra | |
d62a17ae | 2256 | ->vnc.import.rd, |
2257 | (struct prefix *)prd)) { | |
65efcfce LB |
2258 | |
2259 | #if DEBUG_BI_SEARCH | |
d62a17ae | 2260 | vnc_zlog_debug_verbose( |
2261 | "%s: peer and RD same, doing aux_prefix check", | |
2262 | __func__); | |
65efcfce | 2263 | #endif |
d62a17ae | 2264 | if (!aux_prefix |
40381db7 DS |
2265 | || !prefix_cmp( |
2266 | aux_prefix, | |
2267 | &bpi_result->extra->vnc.import | |
2268 | .aux_prefix)) { | |
65efcfce LB |
2269 | |
2270 | #if DEBUG_BI_SEARCH | |
d62a17ae | 2271 | vnc_zlog_debug_verbose("%s: match", |
2272 | __func__); | |
65efcfce | 2273 | #endif |
d62a17ae | 2274 | break; |
2275 | } | |
2276 | } | |
2277 | } | |
40381db7 | 2278 | return bpi_result; |
d62a17ae | 2279 | } |
2280 | ||
40381db7 DS |
2281 | bpi_fake.peer = peer; |
2282 | bpi_fake.extra = &bpi_extra; | |
2283 | bpi_fake.extra->vnc.import.rd = *(struct prefix_rd *)prd; | |
d62a17ae | 2284 | if (aux_prefix) { |
40381db7 | 2285 | bpi_fake.extra->vnc.import.aux_prefix = *aux_prefix; |
d62a17ae | 2286 | } else { |
2287 | /* wildcard */ | |
40381db7 DS |
2288 | bpi_fake.extra->vnc.import.aux_prefix.family = AF_ETHERNET; |
2289 | bpi_fake.extra->vnc.import.aux_prefix.prefixlen = 1; | |
d62a17ae | 2290 | } |
2291 | ||
40381db7 | 2292 | rc = skiplist_search(sl, (void *)&bpi_fake, (void *)&bpi_result); |
d62a17ae | 2293 | |
2294 | if (rc) { | |
65efcfce | 2295 | #if DEBUG_BI_SEARCH |
d62a17ae | 2296 | vnc_zlog_debug_verbose("%s: no match", __func__); |
65efcfce | 2297 | #endif |
d62a17ae | 2298 | return NULL; |
2299 | } | |
65efcfce LB |
2300 | |
2301 | #if DEBUG_BI_SEARCH | |
40381db7 | 2302 | vnc_zlog_debug_verbose("%s: matched bpi=%p", __func__, bpi_result); |
65efcfce LB |
2303 | #endif |
2304 | ||
40381db7 | 2305 | return bpi_result; |
65efcfce LB |
2306 | } |
2307 | ||
fe08ba7e | 2308 | static void rfapiItBiIndexDel(struct agg_node *rn, /* Import table VPN node */ |
40381db7 | 2309 | struct bgp_path_info *bpi) /* old BPI */ |
65efcfce | 2310 | { |
d62a17ae | 2311 | struct skiplist *sl; |
2312 | int rc; | |
65efcfce | 2313 | |
d62a17ae | 2314 | { |
06b9f471 DS |
2315 | char buf[RD_ADDRSTRLEN]; |
2316 | ||
40381db7 DS |
2317 | vnc_zlog_debug_verbose("%s: bpi %p, peer %p, rd %s", __func__, |
2318 | bpi, bpi->peer, | |
2319 | prefix_rd2str(&bpi->extra->vnc.import.rd, | |
06b9f471 | 2320 | buf, sizeof(buf))); |
d62a17ae | 2321 | } |
65efcfce | 2322 | |
d62a17ae | 2323 | sl = RFAPI_RDINDEX(rn); |
2324 | assert(sl); | |
65efcfce | 2325 | |
40381db7 | 2326 | rc = skiplist_delete(sl, (void *)(bpi), (void *)bpi); |
d62a17ae | 2327 | if (rc) { |
2328 | rfapiItBiIndexDump(rn); | |
2329 | } | |
2330 | assert(!rc); | |
65efcfce | 2331 | |
fe08ba7e | 2332 | agg_unlock_node(rn); /* for skiplist entry */ |
65efcfce | 2333 | |
40381db7 | 2334 | /* NB: BPIs in import tables are not refcounted */ |
65efcfce LB |
2335 | } |
2336 | ||
2337 | /* | |
2338 | * Add a backreference at the ENCAP node to the VPN route that | |
2339 | * refers to it | |
2340 | */ | |
4b7e6066 DS |
2341 | static void |
2342 | rfapiMonitorEncapAdd(struct rfapi_import_table *import_table, | |
40381db7 DS |
2343 | struct prefix *p, /* VN address */ |
2344 | struct agg_node *vpn_rn, /* VPN node */ | |
2345 | struct bgp_path_info *vpn_bpi) /* VPN bpi/route */ | |
65efcfce | 2346 | { |
d62a17ae | 2347 | afi_t afi = family2afi(p->family); |
fe08ba7e | 2348 | struct agg_node *rn; |
d62a17ae | 2349 | struct rfapi_monitor_encap *m; |
2350 | ||
2351 | assert(afi); | |
fe08ba7e | 2352 | rn = agg_node_get(import_table->imported_encap[afi], p); /* locks rn */ |
d62a17ae | 2353 | assert(rn); |
2354 | ||
2355 | m = XCALLOC(MTYPE_RFAPI_MONITOR_ENCAP, | |
2356 | sizeof(struct rfapi_monitor_encap)); | |
2357 | assert(m); | |
2358 | ||
2359 | m->node = vpn_rn; | |
40381db7 | 2360 | m->bpi = vpn_bpi; |
d62a17ae | 2361 | m->rn = rn; |
2362 | ||
2363 | /* insert to encap node's list */ | |
2364 | m->next = RFAPI_MONITOR_ENCAP(rn); | |
2365 | if (m->next) | |
2366 | m->next->prev = m; | |
2367 | RFAPI_MONITOR_ENCAP_W_ALLOC(rn) = m; | |
2368 | ||
2369 | /* for easy lookup when deleting vpn route */ | |
40381db7 | 2370 | vpn_bpi->extra->vnc.import.hme = m; |
d62a17ae | 2371 | |
2372 | vnc_zlog_debug_verbose( | |
40381db7 DS |
2373 | "%s: it=%p, vpn_bpi=%p, afi=%d, encap rn=%p, setting vpn_bpi->extra->vnc.import.hme=%p", |
2374 | __func__, import_table, vpn_bpi, afi, rn, m); | |
d62a17ae | 2375 | |
2376 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, 0); | |
40381db7 | 2377 | bgp_attr_intern(vpn_bpi->attr); |
65efcfce LB |
2378 | } |
2379 | ||
40381db7 | 2380 | static void rfapiMonitorEncapDelete(struct bgp_path_info *vpn_bpi) |
65efcfce | 2381 | { |
d62a17ae | 2382 | /* |
2383 | * Remove encap monitor | |
2384 | */ | |
40381db7 DS |
2385 | vnc_zlog_debug_verbose("%s: vpn_bpi=%p", __func__, vpn_bpi); |
2386 | if (vpn_bpi->extra) { | |
2387 | struct rfapi_monitor_encap *hme = | |
2388 | vpn_bpi->extra->vnc.import.hme; | |
d62a17ae | 2389 | |
2390 | if (hme) { | |
2391 | ||
2392 | vnc_zlog_debug_verbose("%s: hme=%p", __func__, hme); | |
2393 | ||
2394 | /* Refcount checking takes too long here */ | |
2395 | // RFAPI_CHECK_REFCOUNT(hme->rn, SAFI_ENCAP, 0); | |
2396 | if (hme->next) | |
2397 | hme->next->prev = hme->prev; | |
2398 | if (hme->prev) | |
2399 | hme->prev->next = hme->next; | |
2400 | else | |
2401 | RFAPI_MONITOR_ENCAP_W_ALLOC(hme->rn) = | |
2402 | hme->next; | |
2403 | /* Refcount checking takes too long here */ | |
2404 | // RFAPI_CHECK_REFCOUNT(hme->rn, SAFI_ENCAP, 1); | |
2405 | ||
2406 | /* see if the struct rfapi_it_extra is empty and can be | |
2407 | * freed */ | |
2408 | rfapiMonitorExtraPrune(SAFI_ENCAP, hme->rn); | |
2409 | ||
fe08ba7e | 2410 | agg_unlock_node(hme->rn); /* decr ref count */ |
d62a17ae | 2411 | XFREE(MTYPE_RFAPI_MONITOR_ENCAP, hme); |
40381db7 | 2412 | vpn_bpi->extra->vnc.import.hme = NULL; |
d62a17ae | 2413 | } |
2414 | } | |
65efcfce LB |
2415 | } |
2416 | ||
2417 | /* | |
2418 | * quagga lib/thread.h says this must return int even though | |
2419 | * it doesn't do anything with the return value | |
2420 | */ | |
d62a17ae | 2421 | static int rfapiWithdrawTimerVPN(struct thread *t) |
65efcfce | 2422 | { |
d62a17ae | 2423 | struct rfapi_withdraw *wcb = t->arg; |
40381db7 | 2424 | struct bgp_path_info *bpi = wcb->info; |
d62a17ae | 2425 | struct bgp *bgp = bgp_get_default(); |
2426 | ||
2427 | struct rfapi_monitor_vpn *moved; | |
2428 | afi_t afi; | |
2429 | ||
2430 | assert(wcb->node); | |
40381db7 | 2431 | assert(bpi); |
d62a17ae | 2432 | assert(wcb->import_table); |
40381db7 | 2433 | assert(bpi->extra); |
d62a17ae | 2434 | |
2435 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_MPLS_VPN, wcb->lockoffset); | |
2436 | ||
2437 | { | |
2438 | char buf[BUFSIZ]; | |
2439 | ||
2440 | vnc_zlog_debug_verbose( | |
40381db7 | 2441 | "%s: removing bpi %p at prefix %s/%d", __func__, bpi, |
d62a17ae | 2442 | rfapi_ntop(wcb->node->p.family, &wcb->node->p.u.prefix, |
2443 | buf, BUFSIZ), | |
2444 | wcb->node->p.prefixlen); | |
2445 | } | |
2446 | ||
2447 | /* | |
2448 | * Remove the route (doubly-linked) | |
2449 | */ | |
40381db7 DS |
2450 | if (CHECK_FLAG(bpi->flags, BGP_PATH_VALID) |
2451 | && VALID_INTERIOR_TYPE(bpi->type)) | |
d62a17ae | 2452 | RFAPI_MONITOR_EXTERIOR(wcb->node)->valid_interior_count--; |
2453 | ||
2454 | afi = family2afi(wcb->node->p.family); | |
2455 | wcb->import_table->holddown_count[afi] -= 1; /* keep count consistent */ | |
40381db7 DS |
2456 | rfapiItBiIndexDel(wcb->node, bpi); |
2457 | rfapiBgpInfoDetach(wcb->node, bpi); /* with removed bpi */ | |
d62a17ae | 2458 | |
2459 | vnc_import_bgp_exterior_del_route_interior(bgp, wcb->import_table, | |
40381db7 | 2460 | wcb->node, bpi); |
d62a17ae | 2461 | |
2462 | ||
2463 | /* | |
2464 | * If VNC is configured to send response remove messages, AND | |
2465 | * if the removed route had a UN address, do response removal | |
2466 | * processing. | |
2467 | */ | |
2468 | if (!(bgp->rfapi_cfg->flags | |
2469 | & BGP_VNC_CONFIG_RESPONSE_REMOVAL_DISABLE)) { | |
2470 | ||
2471 | int has_valid_duplicate = 0; | |
40381db7 | 2472 | struct bgp_path_info *bpii; |
d62a17ae | 2473 | |
2474 | /* | |
2475 | * First check if there are any OTHER routes at this node | |
2476 | * that have the same nexthop and a valid UN address. If | |
2477 | * there are (e.g., from other peers), then the route isn't | |
2478 | * really gone, so skip sending a response removal message. | |
2479 | */ | |
40381db7 DS |
2480 | for (bpii = wcb->node->info; bpii; bpii = bpii->next) { |
2481 | if (rfapiVpnBiSamePtUn(bpi, bpii)) { | |
d62a17ae | 2482 | has_valid_duplicate = 1; |
2483 | break; | |
2484 | } | |
2485 | } | |
2486 | ||
2487 | vnc_zlog_debug_verbose("%s: has_valid_duplicate=%d", __func__, | |
2488 | has_valid_duplicate); | |
2489 | ||
2490 | if (!has_valid_duplicate) { | |
2491 | rfapiRibPendingDeleteRoute(bgp, wcb->import_table, afi, | |
2492 | wcb->node); | |
2493 | } | |
2494 | } | |
2495 | ||
40381db7 | 2496 | rfapiMonitorEncapDelete(bpi); |
d62a17ae | 2497 | |
2498 | /* | |
2499 | * If there are no VPN monitors at this VPN Node A, | |
2500 | * we are done | |
2501 | */ | |
2502 | if (!RFAPI_MONITOR_VPN(wcb->node)) { | |
2503 | vnc_zlog_debug_verbose("%s: no VPN monitors at this node", | |
2504 | __func__); | |
2505 | goto done; | |
2506 | } | |
2507 | ||
2508 | /* | |
2509 | * rfapiMonitorMoveShorter only moves monitors if there are | |
2510 | * no remaining valid routes at the current node | |
2511 | */ | |
2512 | moved = rfapiMonitorMoveShorter(wcb->node, 1); | |
2513 | ||
2514 | if (moved) { | |
2515 | rfapiMonitorMovedUp(wcb->import_table, wcb->node, moved->node, | |
2516 | moved); | |
2517 | } | |
65efcfce LB |
2518 | |
2519 | done: | |
d62a17ae | 2520 | /* |
40381db7 | 2521 | * Free VPN bpi |
d62a17ae | 2522 | */ |
40381db7 | 2523 | rfapiBgpInfoFree(bpi); |
d62a17ae | 2524 | wcb->info = NULL; |
2525 | ||
2526 | /* | |
2527 | * If route count at this node has gone to 0, withdraw exported prefix | |
2528 | */ | |
2529 | if (!wcb->node->info) { | |
2530 | /* see if the struct rfapi_it_extra is empty and can be freed */ | |
2531 | rfapiMonitorExtraPrune(SAFI_MPLS_VPN, wcb->node); | |
2532 | vnc_direct_bgp_del_prefix(bgp, wcb->import_table, wcb->node); | |
2533 | vnc_zebra_del_prefix(bgp, wcb->import_table, wcb->node); | |
2534 | } else { | |
2535 | /* | |
2536 | * nexthop change event | |
2537 | * vnc_direct_bgp_add_prefix() will recompute the VN addr | |
2538 | * ecommunity | |
2539 | */ | |
2540 | vnc_direct_bgp_add_prefix(bgp, wcb->import_table, wcb->node); | |
2541 | } | |
2542 | ||
2543 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_MPLS_VPN, 1 + wcb->lockoffset); | |
fe08ba7e | 2544 | agg_unlock_node(wcb->node); /* decr ref count */ |
d62a17ae | 2545 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); |
2546 | return 0; | |
65efcfce LB |
2547 | } |
2548 | ||
2549 | /* | |
2550 | * This works for multiprotocol extension, but not for plain ol' | |
2551 | * unicast IPv4 because that nexthop is stored in attr->nexthop | |
2552 | */ | |
d62a17ae | 2553 | void rfapiNexthop2Prefix(struct attr *attr, struct prefix *p) |
65efcfce | 2554 | { |
d62a17ae | 2555 | assert(p); |
2556 | assert(attr); | |
2557 | ||
2558 | memset(p, 0, sizeof(struct prefix)); | |
2559 | ||
2560 | switch (p->family = BGP_MP_NEXTHOP_FAMILY(attr->mp_nexthop_len)) { | |
2561 | case AF_INET: | |
2562 | p->u.prefix4 = attr->mp_nexthop_global_in; | |
2563 | p->prefixlen = 32; | |
2564 | break; | |
2565 | ||
2566 | case AF_INET6: | |
2567 | p->u.prefix6 = attr->mp_nexthop_global; | |
2568 | p->prefixlen = 128; | |
2569 | break; | |
2570 | ||
2571 | default: | |
2572 | vnc_zlog_debug_verbose("%s: Family is unknown = %d", __func__, | |
2573 | p->family); | |
2574 | } | |
65efcfce LB |
2575 | } |
2576 | ||
d62a17ae | 2577 | void rfapiUnicastNexthop2Prefix(afi_t afi, struct attr *attr, struct prefix *p) |
65efcfce | 2578 | { |
d62a17ae | 2579 | if (afi == AFI_IP) { |
2580 | p->family = AF_INET; | |
2581 | p->prefixlen = 32; | |
2582 | p->u.prefix4 = attr->nexthop; | |
2583 | } else { | |
2584 | rfapiNexthop2Prefix(attr, p); | |
2585 | } | |
65efcfce LB |
2586 | } |
2587 | ||
d62a17ae | 2588 | static int rfapiAttrNexthopAddrDifferent(struct prefix *p1, struct prefix *p2) |
65efcfce | 2589 | { |
d62a17ae | 2590 | if (!p1 || !p2) { |
2591 | vnc_zlog_debug_verbose("%s: p1 or p2 is NULL", __func__); | |
2592 | return 1; | |
2593 | } | |
2594 | ||
2595 | /* | |
2596 | * Are address families the same? | |
2597 | */ | |
2598 | if (p1->family != p2->family) { | |
2599 | return 1; | |
2600 | } | |
2601 | ||
2602 | switch (p1->family) { | |
2603 | case AF_INET: | |
2604 | if (IPV4_ADDR_SAME(&p1->u.prefix4, &p2->u.prefix4)) | |
2605 | return 0; | |
2606 | break; | |
2607 | ||
2608 | case AF_INET6: | |
2609 | if (IPV6_ADDR_SAME(&p1->u.prefix6, &p2->u.prefix6)) | |
2610 | return 0; | |
2611 | break; | |
2612 | ||
2613 | default: | |
2614 | assert(1); | |
2615 | } | |
2616 | ||
2617 | return 1; | |
65efcfce LB |
2618 | } |
2619 | ||
40381db7 DS |
2620 | static void rfapiCopyUnEncap2VPN(struct bgp_path_info *encap_bpi, |
2621 | struct bgp_path_info *vpn_bpi) | |
65efcfce | 2622 | { |
40381db7 DS |
2623 | if (!encap_bpi->attr) { |
2624 | zlog_warn("%s: no encap bpi attr/extra, can't copy UN address", | |
d62a17ae | 2625 | __func__); |
2626 | return; | |
2627 | } | |
2628 | ||
40381db7 DS |
2629 | if (!vpn_bpi || !vpn_bpi->extra) { |
2630 | zlog_warn("%s: no vpn bpi attr/extra, can't copy UN address", | |
d62a17ae | 2631 | __func__); |
2632 | return; | |
2633 | } | |
2634 | ||
40381db7 | 2635 | switch (BGP_MP_NEXTHOP_FAMILY(encap_bpi->attr->mp_nexthop_len)) { |
d62a17ae | 2636 | case AF_INET: |
2637 | ||
2638 | /* | |
2639 | * instrumentation to debug segfault of 091127 | |
2640 | */ | |
40381db7 DS |
2641 | vnc_zlog_debug_verbose("%s: vpn_bpi=%p", __func__, vpn_bpi); |
2642 | if (vpn_bpi) { | |
2643 | vnc_zlog_debug_verbose("%s: vpn_bpi->extra=%p", | |
2644 | __func__, vpn_bpi->extra); | |
d62a17ae | 2645 | } |
2646 | ||
40381db7 DS |
2647 | vpn_bpi->extra->vnc.import.un_family = AF_INET; |
2648 | vpn_bpi->extra->vnc.import.un.addr4 = | |
2649 | encap_bpi->attr->mp_nexthop_global_in; | |
d62a17ae | 2650 | break; |
2651 | ||
2652 | case AF_INET6: | |
40381db7 DS |
2653 | vpn_bpi->extra->vnc.import.un_family = AF_INET6; |
2654 | vpn_bpi->extra->vnc.import.un.addr6 = | |
2655 | encap_bpi->attr->mp_nexthop_global; | |
d62a17ae | 2656 | break; |
2657 | ||
2658 | default: | |
2659 | zlog_warn("%s: invalid encap nexthop length: %d", __func__, | |
40381db7 DS |
2660 | encap_bpi->attr->mp_nexthop_len); |
2661 | vpn_bpi->extra->vnc.import.un_family = 0; | |
d62a17ae | 2662 | break; |
2663 | } | |
65efcfce LB |
2664 | } |
2665 | ||
2666 | /* | |
2667 | * returns 0 on success, nonzero on error | |
2668 | */ | |
40381db7 DS |
2669 | static int |
2670 | rfapiWithdrawEncapUpdateCachedUn(struct rfapi_import_table *import_table, | |
2671 | struct bgp_path_info *encap_bpi, | |
2672 | struct agg_node *vpn_rn, | |
2673 | struct bgp_path_info *vpn_bpi) | |
65efcfce | 2674 | { |
40381db7 | 2675 | if (!encap_bpi) { |
d62a17ae | 2676 | |
2677 | /* | |
2678 | * clear cached UN address | |
2679 | */ | |
40381db7 | 2680 | if (!vpn_bpi || !vpn_bpi->extra) { |
d62a17ae | 2681 | zlog_warn( |
40381db7 | 2682 | "%s: missing VPN bpi/extra, can't clear UN addr", |
d62a17ae | 2683 | __func__); |
2684 | return 1; | |
2685 | } | |
40381db7 DS |
2686 | vpn_bpi->extra->vnc.import.un_family = 0; |
2687 | memset(&vpn_bpi->extra->vnc.import.un, 0, | |
2688 | sizeof(vpn_bpi->extra->vnc.import.un)); | |
2689 | if (CHECK_FLAG(vpn_bpi->flags, BGP_PATH_VALID)) { | |
2690 | if (rfapiGetVncTunnelUnAddr(vpn_bpi->attr, NULL)) { | |
2691 | UNSET_FLAG(vpn_bpi->flags, BGP_PATH_VALID); | |
2692 | if (VALID_INTERIOR_TYPE(vpn_bpi->type)) | |
d62a17ae | 2693 | RFAPI_MONITOR_EXTERIOR(vpn_rn) |
2694 | ->valid_interior_count--; | |
2695 | /* signal interior route withdrawal to | |
2696 | * import-exterior */ | |
2697 | vnc_import_bgp_exterior_del_route_interior( | |
2698 | bgp_get_default(), import_table, vpn_rn, | |
40381db7 | 2699 | vpn_bpi); |
d62a17ae | 2700 | } |
2701 | } | |
2702 | ||
2703 | } else { | |
40381db7 DS |
2704 | if (!vpn_bpi) { |
2705 | zlog_warn("%s: missing VPN bpi, can't clear UN addr", | |
d62a17ae | 2706 | __func__); |
2707 | return 1; | |
2708 | } | |
40381db7 DS |
2709 | rfapiCopyUnEncap2VPN(encap_bpi, vpn_bpi); |
2710 | if (!CHECK_FLAG(vpn_bpi->flags, BGP_PATH_VALID)) { | |
2711 | SET_FLAG(vpn_bpi->flags, BGP_PATH_VALID); | |
2712 | if (VALID_INTERIOR_TYPE(vpn_bpi->type)) | |
d62a17ae | 2713 | RFAPI_MONITOR_EXTERIOR(vpn_rn) |
2714 | ->valid_interior_count++; | |
2715 | /* signal interior route withdrawal to import-exterior | |
2716 | */ | |
2717 | vnc_import_bgp_exterior_add_route_interior( | |
2718 | bgp_get_default(), import_table, vpn_rn, | |
40381db7 | 2719 | vpn_bpi); |
d62a17ae | 2720 | } |
2721 | } | |
2722 | return 0; | |
65efcfce LB |
2723 | } |
2724 | ||
d62a17ae | 2725 | static int rfapiWithdrawTimerEncap(struct thread *t) |
65efcfce | 2726 | { |
d62a17ae | 2727 | struct rfapi_withdraw *wcb = t->arg; |
40381db7 | 2728 | struct bgp_path_info *bpi = wcb->info; |
d62a17ae | 2729 | int was_first_route = 0; |
2730 | struct rfapi_monitor_encap *em; | |
2731 | struct skiplist *vpn_node_sl = skiplist_new(0, NULL, NULL); | |
2732 | ||
2733 | assert(wcb->node); | |
40381db7 | 2734 | assert(bpi); |
d62a17ae | 2735 | assert(wcb->import_table); |
2736 | ||
2737 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_ENCAP, 0); | |
2738 | ||
40381db7 | 2739 | if (wcb->node->info == bpi) |
d62a17ae | 2740 | was_first_route = 1; |
2741 | ||
2742 | /* | |
40381db7 | 2743 | * Remove the route/bpi and free it |
d62a17ae | 2744 | */ |
40381db7 DS |
2745 | rfapiBgpInfoDetach(wcb->node, bpi); |
2746 | rfapiBgpInfoFree(bpi); | |
d62a17ae | 2747 | |
2748 | if (!was_first_route) | |
2749 | goto done; | |
2750 | ||
2751 | for (em = RFAPI_MONITOR_ENCAP(wcb->node); em; em = em->next) { | |
2752 | ||
2753 | /* | |
40381db7 DS |
2754 | * Update monitoring VPN BPIs with new encap info at the |
2755 | * head of the encap bpi chain (which could be NULL after | |
2756 | * removing the expiring bpi above) | |
d62a17ae | 2757 | */ |
2758 | if (rfapiWithdrawEncapUpdateCachedUn(wcb->import_table, | |
2759 | wcb->node->info, em->node, | |
40381db7 | 2760 | em->bpi)) |
d62a17ae | 2761 | continue; |
2762 | ||
2763 | /* | |
2764 | * Build a list of unique VPN nodes referenced by these | |
2765 | * monitors. | |
2766 | * Use a skiplist for speed. | |
2767 | */ | |
2768 | skiplist_insert(vpn_node_sl, em->node, em->node); | |
2769 | } | |
2770 | ||
2771 | ||
2772 | /* | |
2773 | * for each VPN node referenced in the ENCAP monitors: | |
2774 | */ | |
fe08ba7e | 2775 | struct agg_node *rn; |
d62a17ae | 2776 | while (!skiplist_first(vpn_node_sl, (void **)&rn, NULL)) { |
2777 | if (!wcb->node->info) { | |
2778 | struct rfapi_monitor_vpn *moved; | |
2779 | ||
2780 | moved = rfapiMonitorMoveShorter(rn, 0); | |
2781 | if (moved) { | |
2782 | // rfapiDoRouteCallback(wcb->import_table, | |
2783 | // moved->node, moved); | |
2784 | rfapiMonitorMovedUp(wcb->import_table, rn, | |
2785 | moved->node, moved); | |
2786 | } | |
2787 | } else { | |
2788 | // rfapiDoRouteCallback(wcb->import_table, rn, NULL); | |
2789 | rfapiMonitorItNodeChanged(wcb->import_table, rn, NULL); | |
2790 | } | |
2791 | skiplist_delete_first(vpn_node_sl); | |
2792 | } | |
65efcfce LB |
2793 | |
2794 | done: | |
d62a17ae | 2795 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_ENCAP, 1); |
fe08ba7e | 2796 | agg_unlock_node(wcb->node); /* decr ref count */ |
d62a17ae | 2797 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); |
2798 | skiplist_free(vpn_node_sl); | |
2799 | return 0; | |
65efcfce LB |
2800 | } |
2801 | ||
2802 | ||
2803 | /* | |
2804 | * Works for both VPN and ENCAP routes; timer_service_func is different | |
2805 | * in each case | |
2806 | */ | |
2807 | static void | |
d62a17ae | 2808 | rfapiBiStartWithdrawTimer(struct rfapi_import_table *import_table, |
40381db7 | 2809 | struct agg_node *rn, struct bgp_path_info *bpi, |
4b7e6066 | 2810 | afi_t afi, safi_t safi, |
d62a17ae | 2811 | int (*timer_service_func)(struct thread *)) |
65efcfce | 2812 | { |
d62a17ae | 2813 | uint32_t lifetime; |
2814 | struct rfapi_withdraw *wcb; | |
2815 | ||
40381db7 | 2816 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
a8fd6fde QY |
2817 | /* |
2818 | * Already on the path to being withdrawn, | |
2819 | * should already have a timer set up to | |
2820 | * delete it. | |
2821 | */ | |
2822 | vnc_zlog_debug_verbose( | |
2823 | "%s: already being withdrawn, do nothing", __func__); | |
2824 | return; | |
2825 | } | |
d62a17ae | 2826 | |
40381db7 | 2827 | rfapiGetVncLifetime(bpi->attr, &lifetime); |
d62a17ae | 2828 | vnc_zlog_debug_verbose("%s: VNC lifetime is %u", __func__, lifetime); |
2829 | ||
2830 | /* | |
2831 | * withdrawn routes get to hang around for a while | |
2832 | */ | |
40381db7 | 2833 | SET_FLAG(bpi->flags, BGP_PATH_REMOVED); |
d62a17ae | 2834 | |
2835 | /* set timer to remove the route later */ | |
2836 | lifetime = rfapiGetHolddownFromLifetime(lifetime); | |
2837 | vnc_zlog_debug_verbose("%s: using timeout %u", __func__, lifetime); | |
2838 | ||
2839 | /* | |
2840 | * Stash import_table, node, and info for use by timer | |
2841 | * service routine, which is supposed to free the wcb. | |
2842 | */ | |
2843 | wcb = XCALLOC(MTYPE_RFAPI_WITHDRAW, sizeof(struct rfapi_withdraw)); | |
2844 | assert(wcb); | |
2845 | wcb->node = rn; | |
40381db7 | 2846 | wcb->info = bpi; |
d62a17ae | 2847 | wcb->import_table = import_table; |
40381db7 | 2848 | bgp_attr_intern(bpi->attr); |
d62a17ae | 2849 | |
2850 | if (VNC_DEBUG(VERBOSE)) { | |
2851 | vnc_zlog_debug_verbose( | |
40381db7 | 2852 | "%s: wcb values: node=%p, info=%p, import_table=%p (bpi follows)", |
d62a17ae | 2853 | __func__, wcb->node, wcb->info, wcb->import_table); |
40381db7 | 2854 | rfapiPrintBi(NULL, bpi); |
d62a17ae | 2855 | } |
2856 | ||
2857 | ||
40381db7 | 2858 | assert(bpi->extra); |
d62a17ae | 2859 | if (lifetime > UINT32_MAX / 1001) { |
2860 | /* sub-optimal case, but will probably never happen */ | |
40381db7 | 2861 | bpi->extra->vnc.import.timer = NULL; |
d62a17ae | 2862 | thread_add_timer(bm->master, timer_service_func, wcb, lifetime, |
40381db7 | 2863 | &bpi->extra->vnc.import.timer); |
d62a17ae | 2864 | } else { |
2865 | static uint32_t jitter; | |
2866 | uint32_t lifetime_msec; | |
2867 | ||
2868 | /* | |
2869 | * the goal here is to spread out the timers so they are | |
2870 | * sortable in the skip list | |
2871 | */ | |
2872 | if (++jitter >= 1000) | |
2873 | jitter = 0; | |
2874 | ||
2875 | lifetime_msec = (lifetime * 1000) + jitter; | |
2876 | ||
40381db7 | 2877 | bpi->extra->vnc.import.timer = NULL; |
d62a17ae | 2878 | thread_add_timer_msec(bm->master, timer_service_func, wcb, |
2879 | lifetime_msec, | |
40381db7 | 2880 | &bpi->extra->vnc.import.timer); |
d62a17ae | 2881 | } |
2882 | ||
1defdda8 | 2883 | /* re-sort route list (BGP_PATH_REMOVED routes are last) */ |
4b7e6066 | 2884 | if (((struct bgp_path_info *)rn->info)->next) { |
40381db7 DS |
2885 | rfapiBgpInfoDetach(rn, bpi); |
2886 | rfapiBgpInfoAttachSorted(rn, bpi, afi, safi); | |
d62a17ae | 2887 | } |
65efcfce LB |
2888 | } |
2889 | ||
2890 | ||
d62a17ae | 2891 | typedef void(rfapi_bi_filtered_import_f)(struct rfapi_import_table *, int, |
2892 | struct peer *, void *, struct prefix *, | |
2893 | struct prefix *, afi_t, | |
2894 | struct prefix_rd *, struct attr *, | |
d7c0a89a | 2895 | uint8_t, uint8_t, uint32_t *); |
65efcfce LB |
2896 | |
2897 | ||
d62a17ae | 2898 | static void rfapiExpireEncapNow(struct rfapi_import_table *it, |
40381db7 | 2899 | struct agg_node *rn, struct bgp_path_info *bpi) |
65efcfce | 2900 | { |
d62a17ae | 2901 | struct rfapi_withdraw *wcb; |
2902 | struct thread t; | |
2903 | ||
2904 | /* | |
2905 | * pretend we're an expiring timer | |
2906 | */ | |
2907 | wcb = XCALLOC(MTYPE_RFAPI_WITHDRAW, sizeof(struct rfapi_withdraw)); | |
40381db7 | 2908 | wcb->info = bpi; |
d62a17ae | 2909 | wcb->node = rn; |
2910 | wcb->import_table = it; | |
2911 | memset(&t, 0, sizeof(t)); | |
2912 | t.arg = wcb; | |
2913 | rfapiWithdrawTimerEncap(&t); /* frees wcb */ | |
65efcfce LB |
2914 | } |
2915 | ||
d62a17ae | 2916 | static int rfapiGetNexthop(struct attr *attr, struct prefix *prefix) |
65efcfce | 2917 | { |
d62a17ae | 2918 | switch (BGP_MP_NEXTHOP_FAMILY(attr->mp_nexthop_len)) { |
2919 | case AF_INET: | |
2920 | prefix->family = AF_INET; | |
2921 | prefix->prefixlen = 32; | |
2922 | prefix->u.prefix4 = attr->mp_nexthop_global_in; | |
2923 | break; | |
2924 | case AF_INET6: | |
2925 | prefix->family = AF_INET6; | |
2926 | prefix->prefixlen = 128; | |
2927 | prefix->u.prefix6 = attr->mp_nexthop_global; | |
2928 | break; | |
2929 | default: | |
2930 | vnc_zlog_debug_verbose("%s: unknown attr->mp_nexthop_len %d", | |
2931 | __func__, attr->mp_nexthop_len); | |
2932 | return EINVAL; | |
2933 | } | |
2934 | return 0; | |
65efcfce LB |
2935 | } |
2936 | ||
d62a17ae | 2937 | /* |
9b6d8fcf | 2938 | * import a bgp_path_info if its route target list intersects with the |
65efcfce LB |
2939 | * import table's route target list |
2940 | */ | |
d62a17ae | 2941 | static void rfapiBgpInfoFilteredImportEncap( |
2942 | struct rfapi_import_table *import_table, int action, struct peer *peer, | |
2943 | void *rfd, /* set for looped back routes */ | |
2944 | struct prefix *p, | |
2945 | struct prefix *aux_prefix, /* Unused for encap routes */ | |
2946 | afi_t afi, struct prefix_rd *prd, | |
9b6d8fcf DS |
2947 | struct attr *attr, /* part of bgp_path_info */ |
2948 | uint8_t type, /* part of bgp_path_info */ | |
2949 | uint8_t sub_type, /* part of bgp_path_info */ | |
2950 | uint32_t *label) /* part of bgp_path_info */ | |
65efcfce | 2951 | { |
fe08ba7e DS |
2952 | struct agg_table *rt = NULL; |
2953 | struct agg_node *rn; | |
4b7e6066 | 2954 | struct bgp_path_info *info_new; |
40381db7 | 2955 | struct bgp_path_info *bpi; |
4b7e6066 | 2956 | struct bgp_path_info *next; |
d62a17ae | 2957 | char buf[BUFSIZ]; |
2958 | ||
40381db7 DS |
2959 | struct prefix p_firstbpi_old; |
2960 | struct prefix p_firstbpi_new; | |
d62a17ae | 2961 | int replacing = 0; |
2962 | const char *action_str = NULL; | |
2963 | struct prefix un_prefix; | |
2964 | ||
2965 | struct bgp *bgp; | |
2966 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
2967 | ||
2968 | switch (action) { | |
2969 | case FIF_ACTION_UPDATE: | |
2970 | action_str = "update"; | |
2971 | break; | |
2972 | case FIF_ACTION_WITHDRAW: | |
2973 | action_str = "withdraw"; | |
2974 | break; | |
2975 | case FIF_ACTION_KILL: | |
2976 | action_str = "kill"; | |
2977 | break; | |
2978 | default: | |
2979 | assert(0); | |
2980 | break; | |
2981 | } | |
2982 | ||
2983 | vnc_zlog_debug_verbose( | |
2984 | "%s: entry: %s: prefix %s/%d", __func__, action_str, | |
2985 | inet_ntop(p->family, &p->u.prefix, buf, BUFSIZ), p->prefixlen); | |
2986 | ||
40381db7 DS |
2987 | memset(&p_firstbpi_old, 0, sizeof(p_firstbpi_old)); |
2988 | memset(&p_firstbpi_new, 0, sizeof(p_firstbpi_new)); | |
d62a17ae | 2989 | |
2990 | if (action == FIF_ACTION_UPDATE) { | |
2991 | /* | |
2992 | * Compare rt lists. If no intersection, don't import this route | |
2993 | * On a withdraw, peer and RD are sufficient to determine if | |
2994 | * we should act. | |
2995 | */ | |
2996 | if (!attr || !attr->ecommunity) { | |
2997 | ||
2998 | vnc_zlog_debug_verbose( | |
2999 | "%s: attr, extra, or ecommunity missing, not importing", | |
3000 | __func__); | |
3001 | return; | |
3002 | } | |
65efcfce | 3003 | #if RFAPI_REQUIRE_ENCAP_BEEC |
d62a17ae | 3004 | if (!rfapiEcommunitiesMatchBeec(attr->ecommunity)) { |
3005 | vnc_zlog_debug_verbose( | |
3006 | "%s: it=%p: no match for BGP Encapsulation ecommunity", | |
3007 | __func__, import_table); | |
3008 | return; | |
3009 | } | |
65efcfce | 3010 | #endif |
d62a17ae | 3011 | if (!rfapiEcommunitiesIntersect(import_table->rt_import_list, |
3012 | attr->ecommunity)) { | |
3013 | ||
3014 | vnc_zlog_debug_verbose( | |
3015 | "%s: it=%p: no ecommunity intersection", | |
3016 | __func__, import_table); | |
3017 | return; | |
3018 | } | |
3019 | ||
3020 | /* | |
3021 | * Updates must also have a nexthop address | |
3022 | */ | |
3023 | memset(&un_prefix, 0, | |
3024 | sizeof(un_prefix)); /* keep valgrind happy */ | |
3025 | if (rfapiGetNexthop(attr, &un_prefix)) { | |
3026 | vnc_zlog_debug_verbose("%s: missing nexthop address", | |
3027 | __func__); | |
3028 | return; | |
3029 | } | |
3030 | } | |
3031 | ||
3032 | /* | |
3033 | * Figure out which radix tree the route would go into | |
3034 | */ | |
3035 | switch (afi) { | |
3036 | case AFI_IP: | |
3037 | case AFI_IP6: | |
3038 | rt = import_table->imported_encap[afi]; | |
3039 | break; | |
3040 | ||
3041 | default: | |
450971aa | 3042 | flog_err(EC_LIB_DEVELOPMENT, "%s: bad afi %d", __func__, afi); |
d62a17ae | 3043 | return; |
3044 | } | |
3045 | ||
3046 | /* | |
fe08ba7e | 3047 | * agg_node_lookup returns a node only if there is at least |
d62a17ae | 3048 | * one route attached. |
3049 | */ | |
fe08ba7e | 3050 | rn = agg_node_lookup(rt, p); |
65efcfce LB |
3051 | |
3052 | #if DEBUG_ENCAP_MONITOR | |
d62a17ae | 3053 | vnc_zlog_debug_verbose("%s: initial encap lookup(it=%p) rn=%p", |
3054 | __func__, import_table, rn); | |
65efcfce LB |
3055 | #endif |
3056 | ||
d62a17ae | 3057 | if (rn) { |
3058 | ||
3059 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, 1); | |
fe08ba7e | 3060 | agg_unlock_node(rn); /* undo lock in agg_node_lookup */ |
d62a17ae | 3061 | |
3062 | ||
3063 | /* | |
40381db7 | 3064 | * capture nexthop of first bpi |
d62a17ae | 3065 | */ |
3066 | if (rn->info) { | |
3067 | rfapiNexthop2Prefix( | |
4b7e6066 | 3068 | ((struct bgp_path_info *)(rn->info))->attr, |
40381db7 | 3069 | &p_firstbpi_old); |
d62a17ae | 3070 | } |
3071 | ||
40381db7 | 3072 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 3073 | |
3074 | /* | |
9b6d8fcf | 3075 | * Does this bgp_path_info refer to the same route |
d62a17ae | 3076 | * as we are trying to add? |
3077 | */ | |
40381db7 DS |
3078 | vnc_zlog_debug_verbose("%s: comparing BPI %p", __func__, |
3079 | bpi); | |
d62a17ae | 3080 | |
3081 | ||
3082 | /* | |
3083 | * Compare RDs | |
3084 | * | |
40381db7 DS |
3085 | * RD of import table bpi is in |
3086 | * bpi->extra->vnc.import.rd RD of info_orig is in prd | |
d62a17ae | 3087 | */ |
40381db7 DS |
3088 | if (!bpi->extra) { |
3089 | vnc_zlog_debug_verbose("%s: no bpi->extra", | |
d62a17ae | 3090 | __func__); |
3091 | continue; | |
3092 | } | |
3093 | if (prefix_cmp( | |
40381db7 | 3094 | (struct prefix *)&bpi->extra->vnc.import.rd, |
d62a17ae | 3095 | (struct prefix *)prd)) { |
3096 | ||
3097 | vnc_zlog_debug_verbose("%s: prd does not match", | |
3098 | __func__); | |
3099 | continue; | |
3100 | } | |
3101 | ||
3102 | /* | |
3103 | * Compare peers | |
3104 | */ | |
40381db7 | 3105 | if (bpi->peer != peer) { |
d62a17ae | 3106 | vnc_zlog_debug_verbose( |
3107 | "%s: peer does not match", __func__); | |
3108 | continue; | |
3109 | } | |
3110 | ||
40381db7 | 3111 | vnc_zlog_debug_verbose("%s: found matching bpi", |
d62a17ae | 3112 | __func__); |
3113 | ||
40381db7 | 3114 | /* Same route. Delete this bpi, replace with new one */ |
d62a17ae | 3115 | |
3116 | if (action == FIF_ACTION_WITHDRAW) { | |
3117 | ||
3118 | vnc_zlog_debug_verbose( | |
3119 | "%s: withdrawing at prefix %s/%d", | |
3120 | __func__, | |
3121 | inet_ntop(rn->p.family, &rn->p.u.prefix, | |
3122 | buf, BUFSIZ), | |
3123 | rn->p.prefixlen); | |
3124 | ||
3125 | rfapiBiStartWithdrawTimer( | |
40381db7 | 3126 | import_table, rn, bpi, afi, SAFI_ENCAP, |
d62a17ae | 3127 | rfapiWithdrawTimerEncap); |
3128 | ||
3129 | } else { | |
3130 | vnc_zlog_debug_verbose( | |
3131 | "%s: %s at prefix %s/%d", __func__, | |
3132 | ((action == FIF_ACTION_KILL) | |
3133 | ? "killing" | |
3134 | : "replacing"), | |
3135 | inet_ntop(rn->p.family, &rn->p.u.prefix, | |
3136 | buf, BUFSIZ), | |
3137 | rn->p.prefixlen); | |
3138 | ||
3139 | /* | |
3140 | * If this route is waiting to be deleted | |
3141 | * because of | |
3142 | * a previous withdraw, we must cancel its | |
3143 | * timer. | |
3144 | */ | |
40381db7 DS |
3145 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
3146 | && bpi->extra->vnc.import.timer) { | |
d62a17ae | 3147 | |
3148 | struct thread *t = | |
40381db7 | 3149 | (struct thread *)bpi->extra->vnc |
d62a17ae | 3150 | .import.timer; |
3151 | struct rfapi_withdraw *wcb = t->arg; | |
3152 | ||
3153 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
3154 | thread_cancel(t); | |
3155 | } | |
3156 | ||
3157 | if (action == FIF_ACTION_UPDATE) { | |
40381db7 DS |
3158 | rfapiBgpInfoDetach(rn, bpi); |
3159 | rfapiBgpInfoFree(bpi); | |
d62a17ae | 3160 | replacing = 1; |
3161 | } else { | |
3162 | /* | |
3163 | * Kill: do export stuff when removing | |
40381db7 | 3164 | * bpi |
d62a17ae | 3165 | */ |
3166 | struct rfapi_withdraw *wcb; | |
3167 | struct thread t; | |
3168 | ||
3169 | /* | |
3170 | * pretend we're an expiring timer | |
3171 | */ | |
3172 | wcb = XCALLOC( | |
3173 | MTYPE_RFAPI_WITHDRAW, | |
3174 | sizeof(struct rfapi_withdraw)); | |
40381db7 | 3175 | wcb->info = bpi; |
d62a17ae | 3176 | wcb->node = rn; |
3177 | wcb->import_table = import_table; | |
3178 | memset(&t, 0, sizeof(t)); | |
3179 | t.arg = wcb; | |
3180 | rfapiWithdrawTimerEncap( | |
3181 | &t); /* frees wcb */ | |
3182 | } | |
3183 | } | |
3184 | ||
3185 | break; | |
3186 | } | |
3187 | } | |
3188 | ||
3189 | if (rn) | |
3190 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, replacing ? 1 : 0); | |
3191 | ||
3192 | if (action == FIF_ACTION_WITHDRAW || action == FIF_ACTION_KILL) | |
3193 | return; | |
3194 | ||
3195 | info_new = | |
3196 | rfapiBgpInfoCreate(attr, peer, rfd, prd, type, sub_type, NULL); | |
3197 | ||
3198 | if (rn) { | |
3199 | if (!replacing) | |
40381db7 | 3200 | agg_lock_node(rn); /* incr ref count for new BPI */ |
d62a17ae | 3201 | } else { |
fe08ba7e | 3202 | rn = agg_node_get(rt, p); |
d62a17ae | 3203 | } |
3204 | ||
3205 | vnc_zlog_debug_verbose( | |
3206 | "%s: (afi=%d, rn=%p) inserting at prefix %s/%d", __func__, afi, | |
3207 | rn, inet_ntop(rn->p.family, &rn->p.u.prefix, buf, BUFSIZ), | |
3208 | rn->p.prefixlen); | |
3209 | ||
3210 | rfapiBgpInfoAttachSorted(rn, info_new, afi, SAFI_ENCAP); | |
3211 | ||
3212 | /* | |
3213 | * Delete holddown routes from same NVE. See details in | |
3214 | * rfapiBgpInfoFilteredImportVPN() | |
3215 | */ | |
40381db7 | 3216 | for (bpi = info_new->next; bpi; bpi = next) { |
d62a17ae | 3217 | |
3218 | struct prefix pfx_un; | |
3219 | int un_match = 0; | |
3220 | ||
40381db7 DS |
3221 | next = bpi->next; |
3222 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) | |
d62a17ae | 3223 | continue; |
3224 | ||
3225 | /* | |
3226 | * We already match the VN address (it is the prefix | |
3227 | * of the route node) | |
3228 | */ | |
3229 | ||
40381db7 | 3230 | if (!rfapiGetNexthop(bpi->attr, &pfx_un) |
d62a17ae | 3231 | && prefix_same(&pfx_un, &un_prefix)) { |
3232 | ||
3233 | un_match = 1; | |
3234 | } | |
3235 | ||
3236 | if (!un_match) | |
3237 | continue; | |
3238 | ||
3239 | vnc_zlog_debug_verbose( | |
40381db7 | 3240 | "%s: removing holddown bpi matching NVE of new route", |
d62a17ae | 3241 | __func__); |
40381db7 | 3242 | if (bpi->extra->vnc.import.timer) { |
d62a17ae | 3243 | struct thread *t = |
40381db7 | 3244 | (struct thread *)bpi->extra->vnc.import.timer; |
d62a17ae | 3245 | struct rfapi_withdraw *wcb = t->arg; |
3246 | ||
3247 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
3248 | thread_cancel(t); | |
3249 | } | |
40381db7 | 3250 | rfapiExpireEncapNow(import_table, rn, bpi); |
d62a17ae | 3251 | } |
3252 | ||
4b7e6066 | 3253 | rfapiNexthop2Prefix(((struct bgp_path_info *)(rn->info))->attr, |
40381db7 | 3254 | &p_firstbpi_new); |
d62a17ae | 3255 | |
3256 | /* | |
3257 | * If the nexthop address of the selected Encap route (i.e., | |
3258 | * the UN address) has changed, then we must update the VPN | |
3259 | * routes that refer to this Encap route and possibly force | |
3260 | * rfapi callbacks. | |
3261 | */ | |
40381db7 | 3262 | if (rfapiAttrNexthopAddrDifferent(&p_firstbpi_old, &p_firstbpi_new)) { |
d62a17ae | 3263 | |
3264 | struct rfapi_monitor_encap *m; | |
3265 | struct rfapi_monitor_encap *mnext; | |
3266 | ||
fe08ba7e | 3267 | struct agg_node *referenced_vpn_prefix; |
d62a17ae | 3268 | |
3269 | /* | |
3270 | * Optimized approach: build radix tree on the fly to | |
3271 | * hold list of VPN nodes referenced by the ENCAP monitors | |
3272 | * | |
3273 | * The nodes in this table correspond to prefixes of VPN routes. | |
3274 | * The "info" pointer of the node points to a chain of | |
3275 | * struct rfapi_monitor_encap, each of which refers to a | |
3276 | * specific VPN node. | |
3277 | */ | |
fe08ba7e | 3278 | struct agg_table *referenced_vpn_table; |
d62a17ae | 3279 | |
fe08ba7e | 3280 | referenced_vpn_table = agg_table_init(); |
d62a17ae | 3281 | assert(referenced_vpn_table); |
3282 | ||
3283 | /* | |
3284 | * iterate over the set of monitors at this ENCAP node. | |
3285 | */ | |
65efcfce | 3286 | #if DEBUG_ENCAP_MONITOR |
d62a17ae | 3287 | vnc_zlog_debug_verbose("%s: examining monitors at rn=%p", |
3288 | __func__, rn); | |
65efcfce | 3289 | #endif |
d62a17ae | 3290 | for (m = RFAPI_MONITOR_ENCAP(rn); m; m = m->next) { |
3291 | ||
3292 | /* | |
40381db7 | 3293 | * For each referenced bpi/route, copy the ENCAP route's |
d62a17ae | 3294 | * nexthop to the VPN route's cached UN address field |
3295 | * and set | |
3296 | * the address family of the cached UN address field. | |
3297 | */ | |
40381db7 DS |
3298 | rfapiCopyUnEncap2VPN(info_new, m->bpi); |
3299 | if (!CHECK_FLAG(m->bpi->flags, BGP_PATH_VALID)) { | |
3300 | SET_FLAG(m->bpi->flags, BGP_PATH_VALID); | |
3301 | if (VALID_INTERIOR_TYPE(m->bpi->type)) | |
d62a17ae | 3302 | RFAPI_MONITOR_EXTERIOR(m->node) |
3303 | ->valid_interior_count++; | |
3304 | vnc_import_bgp_exterior_add_route_interior( | |
40381db7 | 3305 | bgp, import_table, m->node, m->bpi); |
d62a17ae | 3306 | } |
3307 | ||
3308 | /* | |
3309 | * Build a list of unique VPN nodes referenced by these | |
3310 | * monitors | |
3311 | * | |
3312 | * There could be more than one VPN node here with a | |
3313 | * given | |
3314 | * prefix. Those are currently in an unsorted linear | |
3315 | * list | |
3316 | * per prefix. | |
3317 | */ | |
3318 | ||
fe08ba7e DS |
3319 | referenced_vpn_prefix = |
3320 | agg_node_get(referenced_vpn_table, &m->node->p); | |
d62a17ae | 3321 | assert(referenced_vpn_prefix); |
3322 | for (mnext = referenced_vpn_prefix->info; mnext; | |
3323 | mnext = mnext->next) { | |
3324 | ||
3325 | if (mnext->node == m->node) | |
3326 | break; | |
3327 | } | |
3328 | ||
3329 | if (mnext) { | |
3330 | /* | |
3331 | * already have an entry for this VPN node | |
3332 | */ | |
fe08ba7e | 3333 | agg_unlock_node(referenced_vpn_prefix); |
d62a17ae | 3334 | } else { |
3335 | mnext = XCALLOC( | |
3336 | MTYPE_RFAPI_MONITOR_ENCAP, | |
3337 | sizeof(struct rfapi_monitor_encap)); | |
3338 | assert(mnext); | |
3339 | mnext->node = m->node; | |
3340 | mnext->next = referenced_vpn_prefix->info; | |
3341 | referenced_vpn_prefix->info = mnext; | |
3342 | } | |
3343 | } | |
3344 | ||
3345 | /* | |
3346 | * for each VPN node referenced in the ENCAP monitors: | |
3347 | */ | |
fe08ba7e DS |
3348 | for (referenced_vpn_prefix = |
3349 | agg_route_top(referenced_vpn_table); | |
3350 | referenced_vpn_prefix; | |
3351 | referenced_vpn_prefix = | |
3352 | agg_route_next(referenced_vpn_prefix)) { | |
d62a17ae | 3353 | |
3354 | while ((m = referenced_vpn_prefix->info)) { | |
3355 | ||
fe08ba7e | 3356 | struct agg_node *n; |
d62a17ae | 3357 | |
3358 | rfapiMonitorMoveLonger(m->node); | |
fe08ba7e | 3359 | for (n = m->node; n; n = agg_node_parent(n)) { |
d62a17ae | 3360 | // rfapiDoRouteCallback(import_table, n, |
3361 | // NULL); | |
3362 | } | |
3363 | rfapiMonitorItNodeChanged(import_table, m->node, | |
3364 | NULL); | |
3365 | ||
3366 | referenced_vpn_prefix->info = m->next; | |
fe08ba7e | 3367 | agg_unlock_node(referenced_vpn_prefix); |
d62a17ae | 3368 | XFREE(MTYPE_RFAPI_MONITOR_ENCAP, m); |
3369 | } | |
3370 | } | |
fe08ba7e | 3371 | agg_table_finish(referenced_vpn_table); |
d62a17ae | 3372 | } |
3373 | ||
3374 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, 0); | |
65efcfce LB |
3375 | } |
3376 | ||
d62a17ae | 3377 | static void rfapiExpireVpnNow(struct rfapi_import_table *it, |
40381db7 | 3378 | struct agg_node *rn, struct bgp_path_info *bpi, |
d62a17ae | 3379 | int lockoffset) |
65efcfce | 3380 | { |
d62a17ae | 3381 | struct rfapi_withdraw *wcb; |
3382 | struct thread t; | |
3383 | ||
3384 | /* | |
3385 | * pretend we're an expiring timer | |
3386 | */ | |
3387 | wcb = XCALLOC(MTYPE_RFAPI_WITHDRAW, sizeof(struct rfapi_withdraw)); | |
40381db7 | 3388 | wcb->info = bpi; |
d62a17ae | 3389 | wcb->node = rn; |
3390 | wcb->import_table = it; | |
3391 | wcb->lockoffset = lockoffset; | |
3392 | memset(&t, 0, sizeof(t)); | |
3393 | t.arg = wcb; | |
3394 | rfapiWithdrawTimerVPN(&t); /* frees wcb */ | |
65efcfce LB |
3395 | } |
3396 | ||
3397 | ||
d62a17ae | 3398 | /* |
9b6d8fcf | 3399 | * import a bgp_path_info if its route target list intersects with the |
65efcfce LB |
3400 | * import table's route target list |
3401 | */ | |
d62a17ae | 3402 | void rfapiBgpInfoFilteredImportVPN( |
3403 | struct rfapi_import_table *import_table, int action, struct peer *peer, | |
3404 | void *rfd, /* set for looped back routes */ | |
3405 | struct prefix *p, | |
3406 | struct prefix *aux_prefix, /* AFI_L2VPN: optional IP */ | |
3407 | afi_t afi, struct prefix_rd *prd, | |
9b6d8fcf DS |
3408 | struct attr *attr, /* part of bgp_path_info */ |
3409 | uint8_t type, /* part of bgp_path_info */ | |
3410 | uint8_t sub_type, /* part of bgp_path_info */ | |
3411 | uint32_t *label) /* part of bgp_path_info */ | |
65efcfce | 3412 | { |
fe08ba7e DS |
3413 | struct agg_table *rt = NULL; |
3414 | struct agg_node *rn; | |
3415 | struct agg_node *n; | |
4b7e6066 | 3416 | struct bgp_path_info *info_new; |
40381db7 | 3417 | struct bgp_path_info *bpi; |
4b7e6066 | 3418 | struct bgp_path_info *next; |
d62a17ae | 3419 | char buf[BUFSIZ]; |
3420 | struct prefix vn_prefix; | |
3421 | struct prefix un_prefix; | |
3422 | int un_prefix_valid = 0; | |
fe08ba7e | 3423 | struct agg_node *ern; |
d62a17ae | 3424 | int replacing = 0; |
3425 | int original_had_routes = 0; | |
3426 | struct prefix original_nexthop; | |
3427 | const char *action_str = NULL; | |
3428 | int is_it_ce = 0; | |
3429 | ||
3430 | struct bgp *bgp; | |
3431 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
3432 | ||
3433 | switch (action) { | |
3434 | case FIF_ACTION_UPDATE: | |
3435 | action_str = "update"; | |
3436 | break; | |
3437 | case FIF_ACTION_WITHDRAW: | |
3438 | action_str = "withdraw"; | |
3439 | break; | |
3440 | case FIF_ACTION_KILL: | |
3441 | action_str = "kill"; | |
3442 | break; | |
3443 | default: | |
3444 | assert(0); | |
3445 | break; | |
3446 | } | |
3447 | ||
3448 | if (import_table == bgp->rfapi->it_ce) | |
3449 | is_it_ce = 1; | |
3450 | ||
3451 | vnc_zlog_debug_verbose("%s: entry: %s%s: prefix %s/%d: it %p, afi %s", | |
3452 | __func__, (is_it_ce ? "CE-IT " : ""), action_str, | |
3453 | rfapi_ntop(p->family, &p->u.prefix, buf, BUFSIZ), | |
3454 | p->prefixlen, import_table, afi2str(afi)); | |
3455 | ||
3456 | VNC_ITRCCK; | |
3457 | ||
3458 | /* | |
3459 | * Compare rt lists. If no intersection, don't import this route | |
3460 | * On a withdraw, peer and RD are sufficient to determine if | |
3461 | * we should act. | |
3462 | */ | |
3463 | if (action == FIF_ACTION_UPDATE) { | |
3464 | if (!attr || !attr->ecommunity) { | |
3465 | ||
3466 | vnc_zlog_debug_verbose( | |
3467 | "%s: attr, extra, or ecommunity missing, not importing", | |
3468 | __func__); | |
3469 | return; | |
3470 | } | |
3471 | if ((import_table != bgp->rfapi->it_ce) | |
3472 | && !rfapiEcommunitiesIntersect(import_table->rt_import_list, | |
3473 | attr->ecommunity)) { | |
3474 | ||
3475 | vnc_zlog_debug_verbose( | |
3476 | "%s: it=%p: no ecommunity intersection", | |
3477 | __func__, import_table); | |
3478 | return; | |
3479 | } | |
3480 | ||
3481 | memset(&vn_prefix, 0, | |
3482 | sizeof(vn_prefix)); /* keep valgrind happy */ | |
3483 | if (rfapiGetNexthop(attr, &vn_prefix)) { | |
3484 | /* missing nexthop address would be a bad, bad thing */ | |
3485 | vnc_zlog_debug_verbose("%s: missing nexthop", __func__); | |
3486 | return; | |
3487 | } | |
3488 | } | |
3489 | ||
3490 | /* | |
3491 | * Figure out which radix tree the route would go into | |
3492 | */ | |
3493 | switch (afi) { | |
3494 | case AFI_IP: | |
3495 | case AFI_IP6: | |
3496 | case AFI_L2VPN: | |
3497 | rt = import_table->imported_vpn[afi]; | |
3498 | break; | |
3499 | ||
3500 | default: | |
450971aa | 3501 | flog_err(EC_LIB_DEVELOPMENT, "%s: bad afi %d", __func__, afi); |
d62a17ae | 3502 | return; |
3503 | } | |
3504 | ||
3505 | /* clear it */ | |
3506 | memset(&original_nexthop, 0, sizeof(original_nexthop)); | |
3507 | ||
3508 | /* | |
fe08ba7e | 3509 | * agg_node_lookup returns a node only if there is at least |
d62a17ae | 3510 | * one route attached. |
3511 | */ | |
fe08ba7e | 3512 | rn = agg_node_lookup(rt, p); |
d62a17ae | 3513 | |
3514 | vnc_zlog_debug_verbose("%s: rn=%p", __func__, rn); | |
3515 | ||
3516 | if (rn) { | |
3517 | ||
3518 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, 1); | |
fe08ba7e | 3519 | agg_unlock_node(rn); /* undo lock in agg_node_lookup */ |
d62a17ae | 3520 | |
3521 | if (rn->info) | |
3522 | original_had_routes = 1; | |
3523 | ||
3524 | if (VNC_DEBUG(VERBOSE)) { | |
3525 | vnc_zlog_debug_verbose("%s: showing IT node on entry", | |
3526 | __func__); | |
3527 | rfapiShowItNode(NULL, rn); /* debug */ | |
3528 | } | |
3529 | ||
3530 | /* | |
3531 | * Look for same route (will have same RD and peer) | |
3532 | */ | |
40381db7 | 3533 | bpi = rfapiItBiIndexSearch(rn, prd, peer, aux_prefix); |
d62a17ae | 3534 | |
40381db7 | 3535 | if (bpi) { |
d62a17ae | 3536 | |
3537 | /* | |
3538 | * This was an old test when we iterated over the | |
40381db7 | 3539 | * BPIs linearly. Since we're now looking up with |
d62a17ae | 3540 | * RD and peer, comparing types should not be |
3541 | * needed. Changed to assertion. | |
3542 | * | |
3543 | * Compare types. Doing so prevents a RFP-originated | |
3544 | * route from matching an imported route, for example. | |
3545 | */ | |
40381db7 | 3546 | if (VNC_DEBUG(VERBOSE) && bpi->type != type) |
3af8cb57 | 3547 | /* should be handled by RDs, but warn for now */ |
40381db7 DS |
3548 | zlog_warn("%s: type mismatch! (bpi=%d, arg=%d)", |
3549 | __func__, bpi->type, type); | |
d62a17ae | 3550 | |
40381db7 | 3551 | vnc_zlog_debug_verbose("%s: found matching bpi", |
d62a17ae | 3552 | __func__); |
3553 | ||
3554 | /* | |
3555 | * In the special CE table, withdrawals occur without | |
3556 | * holddown | |
3557 | */ | |
3558 | if (import_table == bgp->rfapi->it_ce) { | |
40381db7 | 3559 | vnc_direct_bgp_del_route_ce(bgp, rn, bpi); |
d62a17ae | 3560 | if (action == FIF_ACTION_WITHDRAW) |
3561 | action = FIF_ACTION_KILL; | |
3562 | } | |
3563 | ||
3564 | if (action == FIF_ACTION_WITHDRAW) { | |
3565 | ||
40381db7 DS |
3566 | int washolddown = CHECK_FLAG(bpi->flags, |
3567 | BGP_PATH_REMOVED); | |
d62a17ae | 3568 | |
3569 | vnc_zlog_debug_verbose( | |
3570 | "%s: withdrawing at prefix %s/%d%s", | |
9d303b37 DL |
3571 | __func__, rfapi_ntop(rn->p.family, |
3572 | &rn->p.u.prefix, | |
3573 | buf, BUFSIZ), | |
d62a17ae | 3574 | rn->p.prefixlen, |
3575 | (washolddown | |
3576 | ? " (already being withdrawn)" | |
3577 | : "")); | |
3578 | ||
3579 | VNC_ITRCCK; | |
3580 | if (!washolddown) { | |
3581 | rfapiBiStartWithdrawTimer( | |
40381db7 | 3582 | import_table, rn, bpi, afi, |
d62a17ae | 3583 | SAFI_MPLS_VPN, |
3584 | rfapiWithdrawTimerVPN); | |
3585 | ||
3586 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 3587 | bpi, import_table, afi, -1); |
d62a17ae | 3588 | import_table->holddown_count[afi] += 1; |
3589 | } | |
3590 | VNC_ITRCCK; | |
3591 | } else { | |
3592 | vnc_zlog_debug_verbose( | |
3593 | "%s: %s at prefix %s/%d", __func__, | |
3594 | ((action == FIF_ACTION_KILL) | |
3595 | ? "killing" | |
3596 | : "replacing"), | |
3597 | rfapi_ntop(rn->p.family, | |
3598 | &rn->p.u.prefix, buf, | |
3599 | BUFSIZ), | |
3600 | rn->p.prefixlen); | |
3601 | ||
3602 | /* | |
3603 | * If this route is waiting to be deleted | |
3604 | * because of | |
3605 | * a previous withdraw, we must cancel its | |
3606 | * timer. | |
3607 | */ | |
40381db7 DS |
3608 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
3609 | && bpi->extra->vnc.import.timer) { | |
d62a17ae | 3610 | |
3611 | struct thread *t = | |
40381db7 | 3612 | (struct thread *)bpi->extra->vnc |
d62a17ae | 3613 | .import.timer; |
3614 | struct rfapi_withdraw *wcb = t->arg; | |
3615 | ||
3616 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
3617 | thread_cancel(t); | |
3618 | ||
3619 | import_table->holddown_count[afi] -= 1; | |
3620 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 3621 | bpi, import_table, afi, 1); |
d62a17ae | 3622 | } |
3623 | /* | |
3624 | * decrement remote count (if route is remote) | |
3625 | * because | |
3626 | * we are going to remove it below | |
3627 | */ | |
40381db7 DS |
3628 | RFAPI_UPDATE_ITABLE_COUNT(bpi, import_table, |
3629 | afi, -1); | |
d62a17ae | 3630 | if (action == FIF_ACTION_UPDATE) { |
3631 | replacing = 1; | |
3632 | ||
3633 | /* | |
3634 | * make copy of original nexthop so we | |
3635 | * can see if it changed | |
3636 | */ | |
40381db7 | 3637 | rfapiGetNexthop(bpi->attr, |
d62a17ae | 3638 | &original_nexthop); |
3639 | ||
3640 | /* | |
40381db7 | 3641 | * remove bpi without doing any export |
d62a17ae | 3642 | * processing |
3643 | */ | |
40381db7 | 3644 | if (CHECK_FLAG(bpi->flags, |
1defdda8 | 3645 | BGP_PATH_VALID) |
40381db7 | 3646 | && VALID_INTERIOR_TYPE(bpi->type)) |
d62a17ae | 3647 | RFAPI_MONITOR_EXTERIOR(rn) |
3648 | ->valid_interior_count--; | |
40381db7 DS |
3649 | rfapiItBiIndexDel(rn, bpi); |
3650 | rfapiBgpInfoDetach(rn, bpi); | |
3651 | rfapiMonitorEncapDelete(bpi); | |
d62a17ae | 3652 | vnc_import_bgp_exterior_del_route_interior( |
40381db7 DS |
3653 | bgp, import_table, rn, bpi); |
3654 | rfapiBgpInfoFree(bpi); | |
d62a17ae | 3655 | } else { |
3656 | /* Kill */ | |
3657 | /* | |
40381db7 | 3658 | * remove bpi and do export processing |
d62a17ae | 3659 | */ |
3660 | import_table->holddown_count[afi] += 1; | |
40381db7 | 3661 | rfapiExpireVpnNow(import_table, rn, bpi, |
d62a17ae | 3662 | 0); |
3663 | } | |
3664 | } | |
3665 | } | |
3666 | } | |
3667 | ||
3668 | if (rn) | |
3669 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, replacing ? 1 : 0); | |
3670 | ||
3671 | if (action == FIF_ACTION_WITHDRAW || action == FIF_ACTION_KILL) { | |
3672 | VNC_ITRCCK; | |
3673 | return; | |
3674 | } | |
3675 | ||
3676 | info_new = | |
3677 | rfapiBgpInfoCreate(attr, peer, rfd, prd, type, sub_type, label); | |
3678 | ||
3679 | /* | |
3680 | * lookup un address in encap table | |
3681 | */ | |
fe08ba7e | 3682 | ern = agg_node_match(import_table->imported_encap[afi], &vn_prefix); |
d62a17ae | 3683 | if (ern) { |
3684 | rfapiCopyUnEncap2VPN(ern->info, info_new); | |
fe08ba7e | 3685 | agg_unlock_node(ern); /* undo lock in route_note_match */ |
d62a17ae | 3686 | } else { |
f7813c7c | 3687 | char bpf[PREFIX_STRLEN]; |
872ed4c7 | 3688 | |
f7813c7c | 3689 | prefix2str(&vn_prefix, bpf, sizeof(bpf)); |
d62a17ae | 3690 | /* Not a big deal, just means VPN route got here first */ |
3691 | vnc_zlog_debug_verbose("%s: no encap route for vn addr %s", | |
f7813c7c | 3692 | __func__, bpf); |
d62a17ae | 3693 | info_new->extra->vnc.import.un_family = 0; |
3694 | } | |
3695 | ||
3696 | if (rn) { | |
3697 | if (!replacing) | |
fe08ba7e | 3698 | agg_lock_node(rn); |
d62a17ae | 3699 | } else { |
3700 | /* | |
3701 | * No need to increment reference count, so only "get" | |
3702 | * if the node is not there already | |
3703 | */ | |
fe08ba7e | 3704 | rn = agg_node_get(rt, p); |
d62a17ae | 3705 | } |
3706 | ||
3707 | /* | |
3708 | * For ethernet routes, if there is an accompanying IP address, | |
40381db7 | 3709 | * save it in the bpi |
d62a17ae | 3710 | */ |
3711 | if ((AFI_L2VPN == afi) && aux_prefix) { | |
3712 | ||
40381db7 DS |
3713 | vnc_zlog_debug_verbose("%s: setting BPI's aux_prefix", |
3714 | __func__); | |
d62a17ae | 3715 | info_new->extra->vnc.import.aux_prefix = *aux_prefix; |
3716 | } | |
3717 | ||
3718 | vnc_zlog_debug_verbose( | |
40381db7 | 3719 | "%s: inserting bpi %p at prefix %s/%d #%d", __func__, info_new, |
d62a17ae | 3720 | rfapi_ntop(rn->p.family, &rn->p.u.prefix, buf, BUFSIZ), |
3721 | rn->p.prefixlen, rn->lock); | |
3722 | ||
3723 | rfapiBgpInfoAttachSorted(rn, info_new, afi, SAFI_MPLS_VPN); | |
3724 | rfapiItBiIndexAdd(rn, info_new); | |
3725 | if (!rfapiGetUnAddrOfVpnBi(info_new, NULL)) { | |
3726 | if (VALID_INTERIOR_TYPE(info_new->type)) | |
3727 | RFAPI_MONITOR_EXTERIOR(rn)->valid_interior_count++; | |
1defdda8 | 3728 | SET_FLAG(info_new->flags, BGP_PATH_VALID); |
d62a17ae | 3729 | } |
3730 | RFAPI_UPDATE_ITABLE_COUNT(info_new, import_table, afi, 1); | |
3731 | vnc_import_bgp_exterior_add_route_interior(bgp, import_table, rn, | |
3732 | info_new); | |
3733 | ||
3734 | if (import_table == bgp->rfapi->it_ce) | |
3735 | vnc_direct_bgp_add_route_ce(bgp, rn, info_new); | |
3736 | ||
3737 | if (VNC_DEBUG(VERBOSE)) { | |
3738 | vnc_zlog_debug_verbose("%s: showing IT node", __func__); | |
3739 | rfapiShowItNode(NULL, rn); /* debug */ | |
3740 | } | |
3741 | ||
3742 | rfapiMonitorEncapAdd(import_table, &vn_prefix, rn, info_new); | |
3743 | ||
3744 | if (!rfapiGetUnAddrOfVpnBi(info_new, &un_prefix)) { | |
3745 | ||
3746 | /* | |
3747 | * if we have a valid UN address (either via Encap route | |
3748 | * or via tunnel attribute), then we should attempt | |
3749 | * to move any monitors at less-specific nodes to this node | |
3750 | */ | |
3751 | rfapiMonitorMoveLonger(rn); | |
3752 | ||
3753 | un_prefix_valid = 1; | |
3754 | } | |
3755 | ||
3756 | /* | |
3757 | * 101129 Enhancement: if we add a route (implication: it is not | |
3758 | * in holddown), delete all other routes from this nve at this | |
3759 | * node that are in holddown, regardless of peer. | |
3760 | * | |
3761 | * Reasons it's OK to do that: | |
3762 | * | |
3763 | * - if the holddown route being deleted originally came from BGP VPN, | |
3764 | * it is already gone from BGP (implication of holddown), so there | |
3765 | * won't be any added inconsistency with the BGP RIB. | |
3766 | * | |
3767 | * - once a fresh route is added at a prefix, any routes in holddown | |
3768 | * at that prefix will not show up in RFP responses, so deleting | |
3769 | * the holddown routes won't affect the contents of responses. | |
3770 | * | |
3771 | * - lifetimes are supposed to be consistent, so there should not | |
3772 | * be a case where the fresh route has a shorter lifetime than | |
3773 | * the holddown route, so we don't expect the fresh route to | |
3774 | * disappear and complete its holddown time before the existing | |
3775 | * holddown routes time out. Therefore, we won't have a situation | |
3776 | * where we expect the existing holddown routes to be hidden and | |
3777 | * then to reappear sometime later (as holddown routes) in a | |
3778 | * RFP response. | |
3779 | * | |
3780 | * Among other things, this would enable us to skirt the problem | |
3781 | * of local holddown routes that refer to NVE descriptors that | |
3782 | * have already been closed (if the same NVE triggers a subsequent | |
3783 | * rfapi_open(), the new peer is different and doesn't match the | |
3784 | * peer of the holddown route, so the stale holddown route still | |
3785 | * hangs around until it times out instead of just being replaced | |
3786 | * by the fresh route). | |
3787 | */ | |
3788 | /* | |
40381db7 | 3789 | * We know that the new bpi will have been inserted before any routes |
d62a17ae | 3790 | * in holddown, so we can skip any that came before it |
3791 | */ | |
40381db7 | 3792 | for (bpi = info_new->next; bpi; bpi = next) { |
d62a17ae | 3793 | |
3794 | struct prefix pfx_vn; | |
3795 | struct prefix pfx_un; | |
3796 | int un_match = 0; | |
3797 | int remote_peer_match = 0; | |
3798 | ||
40381db7 | 3799 | next = bpi->next; |
d62a17ae | 3800 | |
3801 | /* | |
3802 | * Must be holddown | |
3803 | */ | |
40381db7 | 3804 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) |
d62a17ae | 3805 | continue; |
3806 | ||
3807 | /* | |
3808 | * Must match VN address (nexthop of VPN route) | |
3809 | */ | |
40381db7 | 3810 | if (rfapiGetNexthop(bpi->attr, &pfx_vn)) |
d62a17ae | 3811 | continue; |
3812 | if (!prefix_same(&pfx_vn, &vn_prefix)) | |
3813 | continue; | |
3814 | ||
3815 | if (un_prefix_valid && /* new route UN addr */ | |
40381db7 | 3816 | !rfapiGetUnAddrOfVpnBi(bpi, &pfx_un) |
d62a17ae | 3817 | && /* old route UN addr */ |
3818 | prefix_same(&pfx_un, &un_prefix)) { /* compare */ | |
3819 | un_match = 1; | |
3820 | } | |
40381db7 DS |
3821 | if (!RFAPI_LOCAL_BI(bpi) && !RFAPI_LOCAL_BI(info_new) |
3822 | && sockunion_same(&bpi->peer->su, &info_new->peer->su)) { | |
d62a17ae | 3823 | /* old & new are both remote, same peer */ |
3824 | remote_peer_match = 1; | |
3825 | } | |
3826 | ||
3827 | if (!un_match & !remote_peer_match) | |
3828 | continue; | |
3829 | ||
3830 | vnc_zlog_debug_verbose( | |
40381db7 | 3831 | "%s: removing holddown bpi matching NVE of new route", |
d62a17ae | 3832 | __func__); |
40381db7 | 3833 | if (bpi->extra->vnc.import.timer) { |
d62a17ae | 3834 | struct thread *t = |
40381db7 | 3835 | (struct thread *)bpi->extra->vnc.import.timer; |
d62a17ae | 3836 | struct rfapi_withdraw *wcb = t->arg; |
3837 | ||
3838 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
3839 | thread_cancel(t); | |
3840 | } | |
40381db7 | 3841 | rfapiExpireVpnNow(import_table, rn, bpi, 0); |
d62a17ae | 3842 | } |
3843 | ||
3844 | if (!original_had_routes) { | |
3845 | /* | |
3846 | * We went from 0 usable routes to 1 usable route. Perform the | |
3847 | * "Adding a Route" export process. | |
3848 | */ | |
3849 | vnc_direct_bgp_add_prefix(bgp, import_table, rn); | |
3850 | vnc_zebra_add_prefix(bgp, import_table, rn); | |
3851 | } else { | |
3852 | /* | |
3853 | * Check for nexthop change event | |
3854 | * Note: the prefix_same() test below detects two situations: | |
3855 | * 1. route is replaced, new route has different nexthop | |
3856 | * 2. new route is added (original_nexthop is 0) | |
3857 | */ | |
3858 | struct prefix new_nexthop; | |
3859 | ||
3860 | rfapiGetNexthop(attr, &new_nexthop); | |
3861 | if (!prefix_same(&original_nexthop, &new_nexthop)) { | |
3862 | /* | |
3863 | * nexthop change event | |
3864 | * vnc_direct_bgp_add_prefix() will recompute VN addr | |
3865 | * ecommunity | |
3866 | */ | |
3867 | vnc_direct_bgp_add_prefix(bgp, import_table, rn); | |
3868 | } | |
3869 | } | |
3870 | ||
3871 | if (!(bgp->rfapi_cfg->flags & BGP_VNC_CONFIG_CALLBACK_DISABLE)) { | |
fe08ba7e | 3872 | for (n = rn; n; n = agg_node_parent(n)) { |
d62a17ae | 3873 | // rfapiDoRouteCallback(import_table, n, NULL); |
3874 | } | |
3875 | rfapiMonitorItNodeChanged(import_table, rn, NULL); | |
3876 | } | |
3877 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, 0); | |
3878 | VNC_ITRCCK; | |
65efcfce LB |
3879 | } |
3880 | ||
21cf6b21 VJ |
3881 | static void rfapiBgpInfoFilteredImportBadSafi( |
3882 | struct rfapi_import_table *import_table, int action, struct peer *peer, | |
3883 | void *rfd, /* set for looped back routes */ | |
3884 | struct prefix *p, | |
3885 | struct prefix *aux_prefix, /* AFI_L2VPN: optional IP */ | |
3886 | afi_t afi, struct prefix_rd *prd, | |
9b6d8fcf DS |
3887 | struct attr *attr, /* part of bgp_path_info */ |
3888 | uint8_t type, /* part of bgp_path_info */ | |
3889 | uint8_t sub_type, /* part of bgp_path_info */ | |
3890 | uint32_t *label) /* part of bgp_path_info */ | |
21cf6b21 VJ |
3891 | { |
3892 | vnc_zlog_debug_verbose("%s: Error, bad safi", __func__); | |
3893 | } | |
3894 | ||
65efcfce | 3895 | static rfapi_bi_filtered_import_f * |
d62a17ae | 3896 | rfapiBgpInfoFilteredImportFunction(safi_t safi) |
65efcfce | 3897 | { |
d62a17ae | 3898 | switch (safi) { |
3899 | case SAFI_MPLS_VPN: | |
3900 | return rfapiBgpInfoFilteredImportVPN; | |
3901 | ||
3902 | case SAFI_ENCAP: | |
3903 | return rfapiBgpInfoFilteredImportEncap; | |
5c525538 RW |
3904 | |
3905 | default: | |
3906 | /* not expected */ | |
1c50c1c0 | 3907 | flog_err(EC_LIB_DEVELOPMENT, "%s: bad safi %d", __func__, safi); |
21cf6b21 | 3908 | return rfapiBgpInfoFilteredImportBadSafi; |
d62a17ae | 3909 | } |
65efcfce LB |
3910 | } |
3911 | ||
d62a17ae | 3912 | void rfapiProcessUpdate(struct peer *peer, |
3913 | void *rfd, /* set when looped from RFP/RFAPI */ | |
3914 | struct prefix *p, struct prefix_rd *prd, | |
d7c0a89a QY |
3915 | struct attr *attr, afi_t afi, safi_t safi, uint8_t type, |
3916 | uint8_t sub_type, uint32_t *label) | |
65efcfce | 3917 | { |
d62a17ae | 3918 | struct bgp *bgp; |
3919 | struct rfapi *h; | |
3920 | struct rfapi_import_table *it; | |
3921 | int has_ip_route = 1; | |
3922 | uint32_t lni = 0; | |
3923 | ||
3924 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
3925 | assert(bgp); | |
3926 | ||
3927 | h = bgp->rfapi; | |
3928 | assert(h); | |
3929 | ||
3930 | /* | |
3931 | * look at high-order byte of RD. FF means MAC | |
3932 | * address is present (VNC L2VPN) | |
3933 | */ | |
3934 | if ((safi == SAFI_MPLS_VPN) | |
3935 | && (decode_rd_type(prd->val) == RD_TYPE_VNC_ETH)) { | |
3936 | struct prefix pfx_mac_buf; | |
3937 | struct prefix pfx_nexthop_buf; | |
3938 | int rc; | |
3939 | ||
3940 | /* | |
3941 | * Set flag if prefix and nexthop are the same - don't | |
3942 | * add the route to normal IP-based import tables | |
3943 | */ | |
3944 | if (!rfapiGetNexthop(attr, &pfx_nexthop_buf)) { | |
3945 | if (!prefix_cmp(&pfx_nexthop_buf, p)) { | |
3946 | has_ip_route = 0; | |
3947 | } | |
3948 | } | |
3949 | ||
3950 | memset(&pfx_mac_buf, 0, sizeof(pfx_mac_buf)); | |
3951 | pfx_mac_buf.family = AF_ETHERNET; | |
3952 | pfx_mac_buf.prefixlen = 48; | |
3953 | memcpy(&pfx_mac_buf.u.prefix_eth.octet, prd->val + 2, 6); | |
3954 | ||
3955 | /* | |
3956 | * Find rt containing LNI (Logical Network ID), which | |
3957 | * _should_ always be present when mac address is present | |
3958 | */ | |
3959 | rc = rfapiEcommunityGetLNI(attr->ecommunity, &lni); | |
3960 | ||
3961 | vnc_zlog_debug_verbose( | |
3962 | "%s: rfapiEcommunityGetLNI returned %d, lni=%d, attr=%p", | |
3963 | __func__, rc, lni, attr); | |
8cea9547 | 3964 | if (!rc) { |
d62a17ae | 3965 | it = rfapiMacImportTableGet(bgp, lni); |
3966 | ||
3967 | rfapiBgpInfoFilteredImportVPN( | |
3968 | it, FIF_ACTION_UPDATE, peer, rfd, | |
3969 | &pfx_mac_buf, /* prefix */ | |
3970 | p, /* aux prefix: IP addr */ | |
3971 | AFI_L2VPN, prd, attr, type, sub_type, label); | |
3972 | } | |
3973 | } | |
3974 | ||
3975 | if (!has_ip_route) | |
3976 | return; | |
3977 | ||
3978 | /* | |
3979 | * Iterate over all import tables; do a filtered import | |
3980 | * for the afi/safi combination | |
3981 | */ | |
3982 | for (it = h->imports; it; it = it->next) { | |
3983 | (*rfapiBgpInfoFilteredImportFunction(safi))( | |
3984 | it, FIF_ACTION_UPDATE, peer, rfd, p, /* prefix */ | |
3985 | NULL, afi, prd, attr, type, sub_type, label); | |
3986 | } | |
3987 | ||
3988 | if (safi == SAFI_MPLS_VPN) { | |
3989 | vnc_direct_bgp_rh_add_route(bgp, afi, p, peer, attr); | |
d62a17ae | 3990 | rfapiBgpInfoFilteredImportVPN( |
3991 | bgp->rfapi->it_ce, FIF_ACTION_UPDATE, peer, rfd, | |
3992 | p, /* prefix */ | |
3993 | NULL, afi, prd, attr, type, sub_type, label); | |
3994 | } | |
65efcfce LB |
3995 | } |
3996 | ||
3997 | ||
d62a17ae | 3998 | void rfapiProcessWithdraw(struct peer *peer, void *rfd, struct prefix *p, |
3999 | struct prefix_rd *prd, struct attr *attr, afi_t afi, | |
d7c0a89a | 4000 | safi_t safi, uint8_t type, int kill) |
65efcfce | 4001 | { |
d62a17ae | 4002 | struct bgp *bgp; |
4003 | struct rfapi *h; | |
4004 | struct rfapi_import_table *it; | |
4005 | ||
4006 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
4007 | assert(bgp); | |
4008 | ||
4009 | h = bgp->rfapi; | |
4010 | assert(h); | |
4011 | ||
4012 | /* | |
4013 | * look at high-order byte of RD. FF means MAC | |
4014 | * address is present (VNC L2VPN) | |
4015 | */ | |
4016 | if (h->import_mac != NULL && safi == SAFI_MPLS_VPN | |
4017 | && decode_rd_type(prd->val) == RD_TYPE_VNC_ETH) { | |
4018 | struct prefix pfx_mac_buf; | |
4019 | void *cursor = NULL; | |
4020 | int rc; | |
4021 | ||
4022 | memset(&pfx_mac_buf, 0, sizeof(pfx_mac_buf)); | |
4023 | pfx_mac_buf.family = AF_ETHERNET; | |
4024 | pfx_mac_buf.prefixlen = 48; | |
4025 | memcpy(&pfx_mac_buf.u.prefix_eth, prd->val + 2, 6); | |
4026 | ||
4027 | /* | |
4028 | * withdraw does not contain attrs, so we don't have | |
4029 | * access to the route's LNI, which would ordinarily | |
4030 | * select the specific mac-based import table. Instead, | |
4031 | * we must iterate over all mac-based tables and rely | |
4032 | * on the RD to match. | |
4033 | * | |
4034 | * If this approach is too slow, add an index where | |
4035 | * key is {RD, peer} and value is the import table | |
4036 | */ | |
4037 | for (rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4038 | &cursor); | |
4039 | rc == 0; rc = skiplist_next(h->import_mac, NULL, | |
4040 | (void **)&it, &cursor)) { | |
65efcfce LB |
4041 | |
4042 | #if DEBUG_L2_EXTRA | |
d62a17ae | 4043 | vnc_zlog_debug_verbose( |
4044 | "%s: calling rfapiBgpInfoFilteredImportVPN(it=%p, afi=AFI_L2VPN)", | |
4045 | __func__, it); | |
65efcfce LB |
4046 | #endif |
4047 | ||
d62a17ae | 4048 | rfapiBgpInfoFilteredImportVPN( |
4049 | it, | |
4050 | (kill ? FIF_ACTION_KILL : FIF_ACTION_WITHDRAW), | |
4051 | peer, rfd, &pfx_mac_buf, /* prefix */ | |
4052 | p, /* aux_prefix: IP */ | |
4053 | AFI_L2VPN, prd, attr, type, 0, | |
4054 | NULL); /* sub_type & label unused for withdraw | |
9d303b37 | 4055 | */ |
d62a17ae | 4056 | } |
4057 | } | |
4058 | ||
4059 | /* | |
4060 | * XXX For the case where the withdraw involves an L2 | |
4061 | * route with no IP information, we rely on the lack | |
4062 | * of RT-list intersection to filter out the withdraw | |
4063 | * from the IP-based import tables below | |
4064 | */ | |
4065 | ||
4066 | /* | |
4067 | * Iterate over all import tables; do a filtered import | |
4068 | * for the afi/safi combination | |
4069 | */ | |
4070 | ||
4071 | for (it = h->imports; it; it = it->next) { | |
4072 | (*rfapiBgpInfoFilteredImportFunction(safi))( | |
4073 | it, (kill ? FIF_ACTION_KILL : FIF_ACTION_WITHDRAW), | |
4074 | peer, rfd, p, /* prefix */ | |
4075 | NULL, afi, prd, attr, type, 0, | |
4076 | NULL); /* sub_type & label unused for withdraw */ | |
4077 | } | |
4078 | ||
4079 | /* TBD the deletion should happen after the lifetime expires */ | |
4080 | if (safi == SAFI_MPLS_VPN) | |
4081 | vnc_direct_bgp_rh_del_route(bgp, afi, p, peer); | |
4082 | ||
4083 | if (safi == SAFI_MPLS_VPN) { | |
4084 | rfapiBgpInfoFilteredImportVPN( | |
4085 | bgp->rfapi->it_ce, | |
4086 | (kill ? FIF_ACTION_KILL : FIF_ACTION_WITHDRAW), peer, | |
4087 | rfd, p, /* prefix */ | |
4088 | NULL, afi, prd, attr, type, 0, | |
4089 | NULL); /* sub_type & label unused for withdraw */ | |
4090 | } | |
65efcfce LB |
4091 | } |
4092 | ||
4093 | /* | |
4094 | * TBD optimized withdraw timer algorithm for case of many | |
4095 | * routes expiring at the same time due to peer drop. | |
4096 | */ | |
4097 | /* | |
40381db7 | 4098 | * 1. Visit all BPIs in all ENCAP import tables. |
65efcfce | 4099 | * |
40381db7 DS |
4100 | * a. If a bpi's peer is the failed peer, remove the bpi. |
4101 | * b. If the removed ENCAP bpi was first in the list of | |
4102 | * BPIs at this ENCAP node, loop over all monitors | |
65efcfce LB |
4103 | * at this node: |
4104 | * | |
4105 | * (1) for each ENCAP monitor, loop over all its | |
4106 | * VPN node monitors and set their RFAPI_MON_FLAG_NEEDCALLBACK | |
4107 | * flags. | |
4108 | * | |
40381db7 DS |
4109 | * 2. Visit all BPIs in all VPN import tables. |
4110 | * a. If a bpi's peer is the failed peer, remove the bpi. | |
65efcfce LB |
4111 | * b. loop over all the VPN node monitors and set their |
4112 | * RFAPI_MON_FLAG_NEEDCALLBACK flags | |
40381db7 | 4113 | * c. If there are no BPIs left at this VPN node, |
65efcfce LB |
4114 | * |
4115 | */ | |
4116 | ||
4117 | ||
4118 | /* surprise, this gets called from peer_delete(), from rfapi_close() */ | |
d62a17ae | 4119 | static void rfapiProcessPeerDownRt(struct peer *peer, |
4120 | struct rfapi_import_table *import_table, | |
4121 | afi_t afi, safi_t safi) | |
65efcfce | 4122 | { |
fe08ba7e | 4123 | struct agg_node *rn; |
40381db7 | 4124 | struct bgp_path_info *bpi; |
fe08ba7e | 4125 | struct agg_table *rt; |
d62a17ae | 4126 | int (*timer_service_func)(struct thread *); |
4127 | ||
4128 | assert(afi == AFI_IP || afi == AFI_IP6); | |
4129 | ||
4130 | VNC_ITRCCK; | |
4131 | ||
4132 | switch (safi) { | |
4133 | case SAFI_MPLS_VPN: | |
4134 | rt = import_table->imported_vpn[afi]; | |
4135 | timer_service_func = rfapiWithdrawTimerVPN; | |
4136 | break; | |
4137 | case SAFI_ENCAP: | |
4138 | rt = import_table->imported_encap[afi]; | |
4139 | timer_service_func = rfapiWithdrawTimerEncap; | |
4140 | break; | |
4141 | default: | |
4142 | assert(0); | |
4143 | } | |
4144 | ||
4145 | ||
fe08ba7e | 4146 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
40381db7 DS |
4147 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
4148 | if (bpi->peer == peer) { | |
d62a17ae | 4149 | |
40381db7 | 4150 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
d62a17ae | 4151 | /* already in holddown, skip */ |
4152 | continue; | |
4153 | } | |
4154 | ||
4155 | if (safi == SAFI_MPLS_VPN) { | |
4156 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 4157 | bpi, import_table, afi, -1); |
d62a17ae | 4158 | import_table->holddown_count[afi] += 1; |
4159 | } | |
40381db7 | 4160 | rfapiBiStartWithdrawTimer(import_table, rn, bpi, |
d62a17ae | 4161 | afi, safi, |
4162 | timer_service_func); | |
4163 | } | |
4164 | } | |
4165 | } | |
4166 | VNC_ITRCCK; | |
65efcfce LB |
4167 | } |
4168 | ||
d62a17ae | 4169 | /* |
65efcfce LB |
4170 | * This gets called when a peer connection drops. We have to remove |
4171 | * all the routes from this peer. | |
4172 | * | |
4173 | * Current approach is crude. TBD Optimize by setting fewer timers and | |
4174 | * grouping withdrawn routes so we can generate callbacks more | |
4175 | * efficiently. | |
4176 | */ | |
d62a17ae | 4177 | void rfapiProcessPeerDown(struct peer *peer) |
65efcfce | 4178 | { |
d62a17ae | 4179 | struct bgp *bgp; |
4180 | struct rfapi *h; | |
4181 | struct rfapi_import_table *it; | |
4182 | ||
4183 | /* | |
4184 | * If this peer is a "dummy" peer structure atached to a RFAPI | |
4185 | * nve_descriptor, we don't need to walk the import tables | |
4186 | * because the routes are already withdrawn by rfapi_close() | |
4187 | */ | |
4188 | if (CHECK_FLAG(peer->flags, PEER_FLAG_IS_RFAPI_HD)) | |
4189 | return; | |
4190 | ||
4191 | /* | |
40381db7 DS |
4192 | * 1. Visit all BPIs in all ENCAP import tables. |
4193 | * Start withdraw timer on the BPIs that match peer. | |
d62a17ae | 4194 | * |
40381db7 DS |
4195 | * 2. Visit All BPIs in all VPN import tables. |
4196 | * Start withdraw timer on the BPIs that match peer. | |
d62a17ae | 4197 | */ |
4198 | ||
4199 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
4200 | if (!bgp) | |
4201 | return; | |
4202 | ||
4203 | h = bgp->rfapi; | |
4204 | assert(h); | |
4205 | ||
4206 | for (it = h->imports; it; it = it->next) { | |
4207 | rfapiProcessPeerDownRt(peer, it, AFI_IP, SAFI_ENCAP); | |
4208 | rfapiProcessPeerDownRt(peer, it, AFI_IP6, SAFI_ENCAP); | |
4209 | rfapiProcessPeerDownRt(peer, it, AFI_IP, SAFI_MPLS_VPN); | |
4210 | rfapiProcessPeerDownRt(peer, it, AFI_IP6, SAFI_MPLS_VPN); | |
4211 | } | |
4212 | ||
4213 | if (h->it_ce) { | |
4214 | rfapiProcessPeerDownRt(peer, h->it_ce, AFI_IP, SAFI_MPLS_VPN); | |
4215 | rfapiProcessPeerDownRt(peer, h->it_ce, AFI_IP6, SAFI_MPLS_VPN); | |
4216 | } | |
65efcfce LB |
4217 | } |
4218 | ||
4219 | /* | |
4220 | * Import an entire RIB (for an afi/safi) to an import table RIB, | |
4221 | * filtered according to the import table's RT list | |
4222 | * | |
4223 | * TBD: does this function need additions to match rfapiProcessUpdate() | |
d62a17ae | 4224 | * for, e.g., L2 handling? |
65efcfce | 4225 | */ |
d62a17ae | 4226 | static void rfapiBgpTableFilteredImport(struct bgp *bgp, |
4227 | struct rfapi_import_table *it, | |
4228 | afi_t afi, safi_t safi) | |
65efcfce | 4229 | { |
d62a17ae | 4230 | struct bgp_node *rn1; |
4231 | struct bgp_node *rn2; | |
4232 | ||
4233 | /* Only these SAFIs have 2-level RIBS */ | |
4234 | assert(safi == SAFI_MPLS_VPN || safi == SAFI_ENCAP); | |
4235 | ||
4236 | /* | |
4237 | * Now visit all the rd nodes and the nodes of all the | |
4238 | * route tables attached to them, and import the routes | |
4239 | * if they have matching route targets | |
4240 | */ | |
4241 | for (rn1 = bgp_table_top(bgp->rib[afi][safi]); rn1; | |
4242 | rn1 = bgp_route_next(rn1)) { | |
4243 | ||
6f94b685 DS |
4244 | if (bgp_node_has_bgp_path_info_data(rn1)) { |
4245 | ||
67009e22 | 4246 | for (rn2 = bgp_table_top(bgp_node_get_bgp_table_info(rn1)); rn2; |
d62a17ae | 4247 | rn2 = bgp_route_next(rn2)) { |
4248 | ||
40381db7 | 4249 | struct bgp_path_info *bpi; |
d62a17ae | 4250 | |
6f94b685 DS |
4251 | for (bpi = bgp_node_get_bgp_path_info(rn2); |
4252 | bpi; bpi = bpi->next) { | |
d7c0a89a | 4253 | uint32_t label = 0; |
d62a17ae | 4254 | |
40381db7 | 4255 | if (CHECK_FLAG(bpi->flags, |
1defdda8 | 4256 | BGP_PATH_REMOVED)) |
d62a17ae | 4257 | continue; |
4258 | ||
40381db7 | 4259 | if (bpi->extra) |
d62a17ae | 4260 | label = decode_label( |
40381db7 | 4261 | &bpi->extra->label[0]); |
d62a17ae | 4262 | (*rfapiBgpInfoFilteredImportFunction( |
4263 | safi))( | |
4264 | it, /* which import table */ | |
40381db7 | 4265 | FIF_ACTION_UPDATE, bpi->peer, |
d62a17ae | 4266 | NULL, &rn2->p, /* prefix */ |
4267 | NULL, afi, | |
4268 | (struct prefix_rd *)&rn1->p, | |
40381db7 DS |
4269 | bpi->attr, bpi->type, |
4270 | bpi->sub_type, &label); | |
d62a17ae | 4271 | } |
4272 | } | |
4273 | } | |
4274 | } | |
65efcfce LB |
4275 | } |
4276 | ||
4277 | ||
4278 | /* per-bgp-instance rfapi data */ | |
d62a17ae | 4279 | struct rfapi *bgp_rfapi_new(struct bgp *bgp) |
65efcfce | 4280 | { |
d62a17ae | 4281 | struct rfapi *h; |
e7038dde | 4282 | afi_t afi; |
d62a17ae | 4283 | struct rfapi_rfp_cfg *cfg = NULL; |
4284 | struct rfapi_rfp_cb_methods *cbm = NULL; | |
4285 | ||
4286 | assert(bgp->rfapi_cfg == NULL); | |
4287 | ||
4288 | h = (struct rfapi *)XCALLOC(MTYPE_RFAPI, sizeof(struct rfapi)); | |
4289 | ||
4290 | for (afi = AFI_IP; afi < AFI_MAX; afi++) { | |
fe08ba7e | 4291 | h->un[afi] = agg_table_init(); |
d62a17ae | 4292 | } |
4293 | ||
4294 | /* | |
4295 | * initialize the ce import table | |
4296 | */ | |
4297 | h->it_ce = XCALLOC(MTYPE_RFAPI_IMPORTTABLE, | |
4298 | sizeof(struct rfapi_import_table)); | |
fe08ba7e DS |
4299 | h->it_ce->imported_vpn[AFI_IP] = agg_table_init(); |
4300 | h->it_ce->imported_vpn[AFI_IP6] = agg_table_init(); | |
4301 | h->it_ce->imported_encap[AFI_IP] = agg_table_init(); | |
4302 | h->it_ce->imported_encap[AFI_IP6] = agg_table_init(); | |
d62a17ae | 4303 | rfapiBgpTableFilteredImport(bgp, h->it_ce, AFI_IP, SAFI_MPLS_VPN); |
4304 | rfapiBgpTableFilteredImport(bgp, h->it_ce, AFI_IP6, SAFI_MPLS_VPN); | |
4305 | ||
4306 | /* | |
4307 | * Set up work queue for deferred rfapi_close operations | |
4308 | */ | |
4309 | h->deferred_close_q = | |
4310 | work_queue_new(bm->master, "rfapi deferred close"); | |
4311 | h->deferred_close_q->spec.workfunc = rfapi_deferred_close_workfunc; | |
4312 | h->deferred_close_q->spec.data = h; | |
4313 | ||
4314 | h->rfp = rfp_start(bm->master, &cfg, &cbm); | |
4315 | bgp->rfapi_cfg = bgp_rfapi_cfg_new(cfg); | |
4316 | if (cbm != NULL) { | |
4317 | h->rfp_methods = *cbm; | |
4318 | } | |
4319 | return h; | |
65efcfce LB |
4320 | } |
4321 | ||
d62a17ae | 4322 | void bgp_rfapi_destroy(struct bgp *bgp, struct rfapi *h) |
65efcfce | 4323 | { |
e7038dde | 4324 | afi_t afi; |
0ae6124f | 4325 | |
d62a17ae | 4326 | if (bgp == NULL || h == NULL) |
4327 | return; | |
4328 | ||
4329 | if (h->resolve_nve_nexthop) { | |
4330 | skiplist_free(h->resolve_nve_nexthop); | |
4331 | h->resolve_nve_nexthop = NULL; | |
4332 | } | |
4333 | ||
fe08ba7e DS |
4334 | agg_table_finish(h->it_ce->imported_vpn[AFI_IP]); |
4335 | agg_table_finish(h->it_ce->imported_vpn[AFI_IP6]); | |
4336 | agg_table_finish(h->it_ce->imported_encap[AFI_IP]); | |
4337 | agg_table_finish(h->it_ce->imported_encap[AFI_IP6]); | |
d62a17ae | 4338 | |
4339 | if (h->import_mac) { | |
4340 | struct rfapi_import_table *it; | |
4341 | void *cursor; | |
4342 | int rc; | |
4343 | ||
9d303b37 DL |
4344 | for (cursor = NULL, |
4345 | rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4346 | &cursor); | |
d62a17ae | 4347 | !rc; rc = skiplist_next(h->import_mac, NULL, (void **)&it, |
4348 | &cursor)) { | |
4349 | ||
4350 | rfapiImportTableFlush(it); | |
4351 | XFREE(MTYPE_RFAPI_IMPORTTABLE, it); | |
4352 | } | |
4353 | skiplist_free(h->import_mac); | |
4354 | h->import_mac = NULL; | |
4355 | } | |
4356 | ||
e208c8f9 | 4357 | work_queue_free_and_null(&h->deferred_close_q); |
d62a17ae | 4358 | |
4359 | if (h->rfp != NULL) | |
4360 | rfp_stop(h->rfp); | |
0ae6124f LB |
4361 | |
4362 | for (afi = AFI_IP; afi < AFI_MAX; afi++) { | |
fe08ba7e | 4363 | agg_table_finish(h->un[afi]); |
0ae6124f LB |
4364 | } |
4365 | ||
d62a17ae | 4366 | XFREE(MTYPE_RFAPI_IMPORTTABLE, h->it_ce); |
4367 | XFREE(MTYPE_RFAPI, h); | |
65efcfce LB |
4368 | } |
4369 | ||
4370 | struct rfapi_import_table * | |
d62a17ae | 4371 | rfapiImportTableRefAdd(struct bgp *bgp, struct ecommunity *rt_import_list, |
4372 | struct rfapi_nve_group_cfg *rfg) | |
65efcfce | 4373 | { |
d62a17ae | 4374 | struct rfapi *h; |
4375 | struct rfapi_import_table *it; | |
4376 | afi_t afi; | |
4377 | ||
4378 | h = bgp->rfapi; | |
4379 | assert(h); | |
4380 | ||
4381 | for (it = h->imports; it; it = it->next) { | |
4382 | if (ecommunity_cmp(it->rt_import_list, rt_import_list)) | |
4383 | break; | |
4384 | } | |
4385 | ||
4386 | vnc_zlog_debug_verbose("%s: matched it=%p", __func__, it); | |
4387 | ||
4388 | if (!it) { | |
4389 | it = XCALLOC(MTYPE_RFAPI_IMPORTTABLE, | |
4390 | sizeof(struct rfapi_import_table)); | |
4391 | assert(it); | |
4392 | it->next = h->imports; | |
4393 | h->imports = it; | |
4394 | ||
4395 | it->rt_import_list = ecommunity_dup(rt_import_list); | |
4396 | it->rfg = rfg; | |
4397 | it->monitor_exterior_orphans = | |
4398 | skiplist_new(0, NULL, (void (*)(void *))prefix_free); | |
4399 | ||
4400 | /* | |
4401 | * fill import route tables from RIBs | |
4402 | * | |
4403 | * Potential area for optimization. If this occurs when | |
4404 | * tables are large (e.g., the operator adds a nve group | |
4405 | * with a new RT list to a running system), it could take | |
4406 | * a while. | |
4407 | * | |
4408 | */ | |
4409 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
4410 | ||
fe08ba7e DS |
4411 | it->imported_vpn[afi] = agg_table_init(); |
4412 | it->imported_encap[afi] = agg_table_init(); | |
d62a17ae | 4413 | |
4414 | rfapiBgpTableFilteredImport(bgp, it, afi, | |
4415 | SAFI_MPLS_VPN); | |
4416 | rfapiBgpTableFilteredImport(bgp, it, afi, SAFI_ENCAP); | |
4417 | ||
4418 | vnc_import_bgp_exterior_redist_enable_it(bgp, afi, it); | |
4419 | } | |
4420 | } | |
4421 | ||
4422 | it->refcount += 1; | |
4423 | ||
4424 | return it; | |
65efcfce LB |
4425 | } |
4426 | ||
4427 | /* | |
4428 | * skiplist element free function | |
4429 | */ | |
d62a17ae | 4430 | static void delete_rem_pfx_na_free(void *na) |
65efcfce | 4431 | { |
d62a17ae | 4432 | uint32_t *pCounter = ((struct rfapi_nve_addr *)na)->info; |
65efcfce | 4433 | |
d62a17ae | 4434 | *pCounter += 1; |
4435 | XFREE(MTYPE_RFAPI_NVE_ADDR, na); | |
65efcfce LB |
4436 | } |
4437 | ||
4438 | /* | |
4439 | * Common deleter for IP and MAC import tables | |
4440 | */ | |
d62a17ae | 4441 | static void rfapiDeleteRemotePrefixesIt( |
4442 | struct bgp *bgp, struct rfapi_import_table *it, struct prefix *un, | |
4443 | struct prefix *vn, struct prefix *p, int delete_active, | |
4444 | int delete_holddown, uint32_t *pARcount, uint32_t *pAHcount, | |
4445 | uint32_t *pHRcount, uint32_t *pHHcount, | |
4446 | struct skiplist *uniq_active_nves, struct skiplist *uniq_holddown_nves) | |
65efcfce | 4447 | { |
d62a17ae | 4448 | afi_t afi; |
65efcfce LB |
4449 | |
4450 | #if DEBUG_L2_EXTRA | |
d62a17ae | 4451 | { |
872ed4c7 | 4452 | char buf_pfx[PREFIX_STRLEN]; |
d62a17ae | 4453 | |
4454 | if (p) { | |
872ed4c7 | 4455 | prefix2str(p, buf_pfx, sizeof(buf_pfx)); |
d62a17ae | 4456 | } else { |
4457 | buf_pfx[0] = '*'; | |
4458 | buf_pfx[1] = 0; | |
4459 | } | |
4460 | ||
4461 | vnc_zlog_debug_verbose( | |
4462 | "%s: entry, p=%s, delete_active=%d, delete_holddown=%d", | |
4463 | __func__, buf_pfx, delete_active, delete_holddown); | |
4464 | } | |
65efcfce LB |
4465 | #endif |
4466 | ||
d62a17ae | 4467 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { |
4468 | ||
fe08ba7e DS |
4469 | struct agg_table *rt; |
4470 | struct agg_node *rn; | |
d62a17ae | 4471 | |
4472 | if (p && (family2afi(p->family) != afi)) { | |
4473 | continue; | |
4474 | } | |
4475 | ||
4476 | rt = it->imported_vpn[afi]; | |
4477 | if (!rt) | |
4478 | continue; | |
4479 | ||
4480 | vnc_zlog_debug_verbose("%s: scanning rt for afi=%d", __func__, | |
4481 | afi); | |
4482 | ||
fe08ba7e | 4483 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
40381db7 | 4484 | struct bgp_path_info *bpi; |
4b7e6066 | 4485 | struct bgp_path_info *next; |
d62a17ae | 4486 | |
8a005002 | 4487 | if (p && VNC_DEBUG(IMPORT_DEL_REMOTE)) { |
872ed4c7 DS |
4488 | char p1line[PREFIX_STRLEN]; |
4489 | char p2line[PREFIX_STRLEN]; | |
d62a17ae | 4490 | |
872ed4c7 DS |
4491 | prefix2str(p, p1line, sizeof(p1line)); |
4492 | prefix2str(&rn->p, p2line, sizeof(p2line)); | |
d62a17ae | 4493 | vnc_zlog_debug_any("%s: want %s, have %s", |
4494 | __func__, p1line, p2line); | |
4495 | } | |
4496 | ||
4497 | if (p && prefix_cmp(p, &rn->p)) | |
4498 | continue; | |
4499 | ||
4500 | { | |
872ed4c7 DS |
4501 | char buf_pfx[PREFIX_STRLEN]; |
4502 | ||
4503 | prefix2str(&rn->p, buf_pfx, sizeof(buf_pfx)); | |
d62a17ae | 4504 | vnc_zlog_debug_verbose("%s: rn pfx=%s", |
4505 | __func__, buf_pfx); | |
4506 | } | |
4507 | ||
4508 | /* TBD is this valid for afi == AFI_L2VPN? */ | |
4509 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, 1); | |
4510 | ||
40381db7 DS |
4511 | for (bpi = rn->info; bpi; bpi = next) { |
4512 | next = bpi->next; | |
d62a17ae | 4513 | |
4514 | struct prefix qpt; | |
4515 | struct prefix qct; | |
4516 | int qpt_valid = 0; | |
4517 | int qct_valid = 0; | |
4518 | int is_active = 0; | |
4519 | ||
40381db7 DS |
4520 | vnc_zlog_debug_verbose("%s: examining bpi %p", |
4521 | __func__, bpi); | |
d62a17ae | 4522 | |
40381db7 DS |
4523 | if (bpi->attr) { |
4524 | if (!rfapiGetNexthop(bpi->attr, &qpt)) | |
d62a17ae | 4525 | qpt_valid = 1; |
4526 | } | |
4527 | if (vn) { | |
4528 | if (!qpt_valid | |
4529 | || !prefix_match(vn, &qpt)) { | |
65efcfce | 4530 | #if DEBUG_L2_EXTRA |
d62a17ae | 4531 | vnc_zlog_debug_verbose( |
4532 | "%s: continue at vn && !qpt_valid || !prefix_match(vn, &qpt)", | |
4533 | __func__); | |
65efcfce | 4534 | #endif |
d62a17ae | 4535 | continue; |
4536 | } | |
4537 | } | |
65efcfce | 4538 | |
40381db7 | 4539 | if (!rfapiGetUnAddrOfVpnBi(bpi, &qct)) |
d62a17ae | 4540 | qct_valid = 1; |
65efcfce | 4541 | |
d62a17ae | 4542 | if (un) { |
4543 | if (!qct_valid | |
4544 | || !prefix_match(un, &qct)) { | |
65efcfce | 4545 | #if DEBUG_L2_EXTRA |
d62a17ae | 4546 | vnc_zlog_debug_verbose( |
4547 | "%s: continue at un && !qct_valid || !prefix_match(un, &qct)", | |
4548 | __func__); | |
65efcfce | 4549 | #endif |
d62a17ae | 4550 | continue; |
4551 | } | |
4552 | } | |
4553 | ||
4554 | ||
4555 | /* | |
40381db7 | 4556 | * Blow bpi away |
d62a17ae | 4557 | */ |
4558 | /* | |
4559 | * If this route is waiting to be deleted | |
4560 | * because of | |
4561 | * a previous withdraw, we must cancel its | |
4562 | * timer. | |
4563 | */ | |
40381db7 | 4564 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
d62a17ae | 4565 | if (!delete_holddown) |
4566 | continue; | |
40381db7 | 4567 | if (bpi->extra->vnc.import.timer) { |
d62a17ae | 4568 | |
4569 | struct thread *t = | |
40381db7 | 4570 | (struct thread *)bpi |
d62a17ae | 4571 | ->extra->vnc |
4572 | .import.timer; | |
4573 | struct rfapi_withdraw *wcb = | |
4574 | t->arg; | |
4575 | ||
4576 | wcb->import_table | |
4577 | ->holddown_count[afi] -= | |
4578 | 1; | |
4579 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 4580 | bpi, wcb->import_table, |
d62a17ae | 4581 | afi, 1); |
4582 | XFREE(MTYPE_RFAPI_WITHDRAW, | |
4583 | wcb); | |
4584 | thread_cancel(t); | |
4585 | } | |
4586 | } else { | |
4587 | if (!delete_active) | |
4588 | continue; | |
4589 | is_active = 1; | |
4590 | } | |
4591 | ||
4592 | vnc_zlog_debug_verbose( | |
40381db7 DS |
4593 | "%s: deleting bpi %p (qct_valid=%d, qpt_valid=%d, delete_holddown=%d, delete_active=%d)", |
4594 | __func__, bpi, qct_valid, qpt_valid, | |
d62a17ae | 4595 | delete_holddown, delete_active); |
4596 | ||
4597 | ||
4598 | /* | |
4599 | * add nve to list | |
4600 | */ | |
4601 | if (qct_valid && qpt_valid) { | |
4602 | ||
4603 | struct rfapi_nve_addr na; | |
4604 | struct rfapi_nve_addr *nap; | |
4605 | ||
4606 | memset(&na, 0, sizeof(na)); | |
4607 | assert(!rfapiQprefix2Raddr(&qct, | |
4608 | &na.un)); | |
4609 | assert(!rfapiQprefix2Raddr(&qpt, | |
4610 | &na.vn)); | |
4611 | ||
4612 | if (skiplist_search( | |
4613 | (is_active | |
4614 | ? uniq_active_nves | |
4615 | : uniq_holddown_nves), | |
4616 | &na, (void **)&nap)) { | |
4617 | char line[BUFSIZ]; | |
4618 | ||
4619 | nap = XCALLOC( | |
4620 | MTYPE_RFAPI_NVE_ADDR, | |
4621 | sizeof(struct | |
4622 | rfapi_nve_addr)); | |
4623 | assert(nap); | |
4624 | *nap = na; | |
4625 | nap->info = is_active | |
4626 | ? pAHcount | |
4627 | : pHHcount; | |
4628 | skiplist_insert( | |
4629 | (is_active | |
4630 | ? uniq_active_nves | |
4631 | : uniq_holddown_nves), | |
4632 | nap, nap); | |
4633 | ||
4634 | rfapiNveAddr2Str(nap, line, | |
4635 | BUFSIZ); | |
4636 | } | |
4637 | } | |
4638 | ||
4639 | vnc_direct_bgp_rh_del_route(bgp, afi, &rn->p, | |
40381db7 | 4640 | bpi->peer); |
d62a17ae | 4641 | |
40381db7 | 4642 | RFAPI_UPDATE_ITABLE_COUNT(bpi, it, afi, -1); |
d62a17ae | 4643 | it->holddown_count[afi] += 1; |
40381db7 | 4644 | rfapiExpireVpnNow(it, rn, bpi, 1); |
d62a17ae | 4645 | |
4646 | vnc_zlog_debug_verbose( | |
4647 | "%s: incrementing count (is_active=%d)", | |
4648 | __func__, is_active); | |
4649 | ||
4650 | if (is_active) | |
4651 | ++*pARcount; | |
4652 | else | |
4653 | ++*pHRcount; | |
4654 | } | |
4655 | } | |
4656 | } | |
65efcfce LB |
4657 | } |
4658 | ||
4659 | ||
4660 | /* | |
4661 | * For use by the "clear vnc prefixes" command | |
4662 | */ | |
4663 | /*------------------------------------------ | |
4664 | * rfapiDeleteRemotePrefixes | |
4665 | * | |
4666 | * UI helper: For use by the "clear vnc prefixes" command | |
4667 | * | |
d62a17ae | 4668 | * input: |
65efcfce LB |
4669 | * un if set, tunnel must match this prefix |
4670 | * vn if set, nexthop prefix must match this prefix | |
4671 | * p if set, prefix must match this prefix | |
5ff06872 | 4672 | * it if set, only look in this import table |
65efcfce LB |
4673 | * |
4674 | * output | |
4675 | * pARcount number of active routes deleted | |
4676 | * pAHcount number of active nves deleted | |
4677 | * pHRcount number of holddown routes deleted | |
4678 | * pHHcount number of holddown nves deleted | |
4679 | * | |
4680 | * return value: | |
4681 | * void | |
4682 | --------------------------------------------*/ | |
d62a17ae | 4683 | void rfapiDeleteRemotePrefixes(struct prefix *un, struct prefix *vn, |
4684 | struct prefix *p, | |
4685 | struct rfapi_import_table *arg_it, | |
4686 | int delete_active, int delete_holddown, | |
4687 | uint32_t *pARcount, uint32_t *pAHcount, | |
4688 | uint32_t *pHRcount, uint32_t *pHHcount) | |
65efcfce | 4689 | { |
d62a17ae | 4690 | struct bgp *bgp; |
4691 | struct rfapi *h; | |
4692 | struct rfapi_import_table *it; | |
4693 | uint32_t deleted_holddown_route_count = 0; | |
4694 | uint32_t deleted_active_route_count = 0; | |
4695 | uint32_t deleted_holddown_nve_count = 0; | |
4696 | uint32_t deleted_active_nve_count = 0; | |
4697 | struct skiplist *uniq_holddown_nves; | |
4698 | struct skiplist *uniq_active_nves; | |
4699 | ||
4700 | VNC_ITRCCK; | |
4701 | ||
4702 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
4703 | /* If no bgp instantiated yet, no vnc prefixes exist */ | |
4704 | if (!bgp) | |
4705 | return; | |
4706 | ||
4707 | h = bgp->rfapi; | |
4708 | assert(h); | |
4709 | ||
4710 | uniq_holddown_nves = | |
4711 | skiplist_new(0, rfapi_nve_addr_cmp, delete_rem_pfx_na_free); | |
4712 | uniq_active_nves = | |
4713 | skiplist_new(0, rfapi_nve_addr_cmp, delete_rem_pfx_na_free); | |
4714 | ||
4715 | /* | |
4716 | * Iterate over all import tables; do a filtered import | |
4717 | * for the afi/safi combination | |
4718 | */ | |
4719 | ||
4720 | if (arg_it) | |
4721 | it = arg_it; | |
4722 | else | |
4723 | it = h->imports; | |
4724 | for (; it;) { | |
4725 | ||
4726 | vnc_zlog_debug_verbose( | |
4727 | "%s: calling rfapiDeleteRemotePrefixesIt() on (IP) import %p", | |
4728 | __func__, it); | |
4729 | ||
4730 | rfapiDeleteRemotePrefixesIt( | |
4731 | bgp, it, un, vn, p, delete_active, delete_holddown, | |
4732 | &deleted_active_route_count, &deleted_active_nve_count, | |
4733 | &deleted_holddown_route_count, | |
4734 | &deleted_holddown_nve_count, uniq_active_nves, | |
4735 | uniq_holddown_nves); | |
4736 | ||
4737 | if (arg_it) | |
4738 | it = NULL; | |
4739 | else | |
4740 | it = it->next; | |
4741 | } | |
4742 | ||
4743 | /* | |
4744 | * Now iterate over L2 import tables | |
4745 | */ | |
4746 | if (h->import_mac && !(p && (p->family != AF_ETHERNET))) { | |
4747 | ||
4748 | void *cursor = NULL; | |
4749 | int rc; | |
4750 | ||
9d303b37 DL |
4751 | for (cursor = NULL, |
4752 | rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4753 | &cursor); | |
d62a17ae | 4754 | !rc; rc = skiplist_next(h->import_mac, NULL, (void **)&it, |
4755 | &cursor)) { | |
4756 | ||
4757 | vnc_zlog_debug_verbose( | |
4758 | "%s: calling rfapiDeleteRemotePrefixesIt() on import_mac %p", | |
4759 | __func__, it); | |
4760 | ||
4761 | rfapiDeleteRemotePrefixesIt( | |
4762 | bgp, it, un, vn, p, delete_active, | |
4763 | delete_holddown, &deleted_active_route_count, | |
4764 | &deleted_active_nve_count, | |
4765 | &deleted_holddown_route_count, | |
4766 | &deleted_holddown_nve_count, uniq_active_nves, | |
4767 | uniq_holddown_nves); | |
4768 | } | |
4769 | } | |
4770 | ||
4771 | /* | |
4772 | * our custom element freeing function above counts as it deletes | |
4773 | */ | |
4774 | skiplist_free(uniq_holddown_nves); | |
4775 | skiplist_free(uniq_active_nves); | |
4776 | ||
4777 | if (pARcount) | |
4778 | *pARcount = deleted_active_route_count; | |
4779 | if (pAHcount) | |
4780 | *pAHcount = deleted_active_nve_count; | |
4781 | if (pHRcount) | |
4782 | *pHRcount = deleted_holddown_route_count; | |
4783 | if (pHHcount) | |
4784 | *pHHcount = deleted_holddown_nve_count; | |
4785 | ||
4786 | VNC_ITRCCK; | |
65efcfce LB |
4787 | } |
4788 | ||
4789 | /*------------------------------------------ | |
4790 | * rfapiCountRemoteRoutes | |
4791 | * | |
4792 | * UI helper: count VRF routes from BGP side | |
4793 | * | |
d62a17ae | 4794 | * input: |
65efcfce LB |
4795 | * |
4796 | * output | |
4797 | * pALRcount count of active local routes | |
4798 | * pARRcount count of active remote routes | |
4799 | * pHRcount count of holddown routes | |
4800 | * pIRcount count of direct imported routes | |
4801 | * | |
4802 | * return value: | |
4803 | * void | |
4804 | --------------------------------------------*/ | |
d62a17ae | 4805 | void rfapiCountAllItRoutes(int *pALRcount, /* active local routes */ |
4806 | int *pARRcount, /* active remote routes */ | |
4807 | int *pHRcount, /* holddown routes */ | |
4808 | int *pIRcount) /* imported routes */ | |
65efcfce | 4809 | { |
d62a17ae | 4810 | struct bgp *bgp; |
4811 | struct rfapi *h; | |
4812 | struct rfapi_import_table *it; | |
4813 | afi_t afi; | |
4814 | ||
4815 | int total_active_local = 0; | |
4816 | int total_active_remote = 0; | |
4817 | int total_holddown = 0; | |
4818 | int total_imported = 0; | |
4819 | ||
4820 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
4821 | assert(bgp); | |
4822 | ||
4823 | h = bgp->rfapi; | |
4824 | assert(h); | |
4825 | ||
4826 | /* | |
4827 | * Iterate over all import tables; do a filtered import | |
4828 | * for the afi/safi combination | |
4829 | */ | |
4830 | ||
4831 | for (it = h->imports; it; it = it->next) { | |
4832 | ||
4833 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
4834 | ||
4835 | total_active_local += it->local_count[afi]; | |
4836 | total_active_remote += it->remote_count[afi]; | |
4837 | total_holddown += it->holddown_count[afi]; | |
4838 | total_imported += it->imported_count[afi]; | |
4839 | } | |
4840 | } | |
4841 | ||
4842 | void *cursor; | |
4843 | int rc; | |
4844 | ||
4845 | if (h->import_mac) { | |
9d303b37 DL |
4846 | for (cursor = NULL, |
4847 | rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4848 | &cursor); | |
d62a17ae | 4849 | !rc; rc = skiplist_next(h->import_mac, NULL, (void **)&it, |
4850 | &cursor)) { | |
4851 | ||
4852 | total_active_local += it->local_count[AFI_L2VPN]; | |
4853 | total_active_remote += it->remote_count[AFI_L2VPN]; | |
4854 | total_holddown += it->holddown_count[AFI_L2VPN]; | |
4855 | total_imported += it->imported_count[AFI_L2VPN]; | |
4856 | } | |
4857 | } | |
4858 | ||
4859 | ||
4860 | if (pALRcount) { | |
4861 | *pALRcount = total_active_local; | |
4862 | } | |
4863 | if (pARRcount) { | |
4864 | *pARRcount = total_active_remote; | |
4865 | } | |
4866 | if (pHRcount) { | |
4867 | *pHRcount = total_holddown; | |
4868 | } | |
4869 | if (pIRcount) { | |
4870 | *pIRcount = total_imported; | |
4871 | } | |
65efcfce LB |
4872 | } |
4873 | ||
4874 | /*------------------------------------------ | |
4875 | * rfapiGetHolddownFromLifetime | |
4876 | * | |
4877 | * calculate holddown value based on lifetime | |
4878 | * | |
d62a17ae | 4879 | * input: |
65efcfce LB |
4880 | * lifetime lifetime |
4881 | * | |
4882 | * return value: | |
4883 | * Holddown value based on lifetime, holddown_factor, | |
4884 | * and RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY | |
4885 | * | |
4886 | --------------------------------------------*/ | |
4887 | /* hold down time maxes out at RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY */ | |
d62a17ae | 4888 | uint32_t rfapiGetHolddownFromLifetime(uint32_t lifetime) |
65efcfce | 4889 | { |
d62a17ae | 4890 | uint32_t factor; |
4891 | struct bgp *bgp; | |
4892 | ||
4893 | bgp = bgp_get_default(); | |
4894 | if (bgp && bgp->rfapi_cfg) | |
4895 | factor = bgp->rfapi_cfg->rfp_cfg.holddown_factor; | |
4896 | else | |
4897 | factor = RFAPI_RFP_CFG_DEFAULT_HOLDDOWN_FACTOR; | |
4898 | ||
4899 | if (factor < 100 || lifetime < RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY) | |
4900 | lifetime = lifetime * factor / 100; | |
4901 | if (lifetime < RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY) | |
4902 | return lifetime; | |
4903 | else | |
4904 | return RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY; | |
65efcfce | 4905 | } |