]>
Commit | Line | Data |
---|---|---|
47a3a827 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
d62a17ae | 2 | /* |
47a3a827 DL |
3 | * Copyright 2009-2016, LabN Consulting, L.L.C. |
4 | */ | |
65efcfce LB |
5 | |
6 | /* | |
7 | * File: rfapi_import.c | |
8 | * Purpose: Handle import of routes from BGP to RFAPI | |
9 | */ | |
10 | ||
f8b6f499 LB |
11 | #include "lib/zebra.h" |
12 | #include "lib/prefix.h" | |
fe08ba7e | 13 | #include "lib/agg_table.h" |
f8b6f499 LB |
14 | #include "lib/vty.h" |
15 | #include "lib/memory.h" | |
16 | #include "lib/log.h" | |
17 | #include "lib/skiplist.h" | |
18 | #include "lib/thread.h" | |
937652c6 | 19 | #include "lib/stream.h" |
02705213 | 20 | #include "lib/lib_errors.h" |
65efcfce | 21 | |
f8b6f499 LB |
22 | #include "bgpd/bgpd.h" |
23 | #include "bgpd/bgp_ecommunity.h" | |
24 | #include "bgpd/bgp_attr.h" | |
25 | #include "bgpd/bgp_route.h" | |
d62a17ae | 26 | #include "bgpd/bgp_mplsvpn.h" /* prefix_rd2str() */ |
f8b6f499 | 27 | #include "bgpd/bgp_vnc_types.h" |
06b9f471 | 28 | #include "bgpd/bgp_rd.h" |
65efcfce | 29 | |
f8b6f499 LB |
30 | #include "bgpd/rfapi/rfapi.h" |
31 | #include "bgpd/rfapi/bgp_rfapi_cfg.h" | |
32 | #include "bgpd/rfapi/rfapi_backend.h" | |
33 | #include "bgpd/rfapi/rfapi_import.h" | |
34 | #include "bgpd/rfapi/rfapi_private.h" | |
35 | #include "bgpd/rfapi/rfapi_monitor.h" | |
36 | #include "bgpd/rfapi/rfapi_nve_addr.h" | |
37 | #include "bgpd/rfapi/rfapi_vty.h" | |
38 | #include "bgpd/rfapi/vnc_export_bgp.h" | |
39 | #include "bgpd/rfapi/vnc_export_bgp_p.h" | |
40 | #include "bgpd/rfapi/vnc_zebra.h" | |
41 | #include "bgpd/rfapi/vnc_import_bgp.h" | |
42 | #include "bgpd/rfapi/vnc_import_bgp_p.h" | |
43 | #include "bgpd/rfapi/rfapi_rib.h" | |
44 | #include "bgpd/rfapi/rfapi_encap_tlv.h" | |
45 | #include "bgpd/rfapi/vnc_debug.h" | |
65efcfce LB |
46 | |
47 | #ifdef HAVE_GLIBC_BACKTRACE | |
48 | /* for backtrace and friends */ | |
49 | #include <execinfo.h> | |
50 | #endif /* HAVE_GLIBC_BACKTRACE */ | |
51 | ||
52 | #undef DEBUG_MONITOR_MOVE_SHORTER | |
53 | #undef DEBUG_RETURNED_NHL | |
54 | #undef DEBUG_ROUTE_COUNTERS | |
55 | #undef DEBUG_ENCAP_MONITOR | |
56 | #undef DEBUG_L2_EXTRA | |
57 | #undef DEBUG_IT_NODES | |
58 | #undef DEBUG_BI_SEARCH | |
59 | ||
60 | /* | |
61 | * Allocated for each withdraw timer instance; freed when the timer | |
62 | * expires or is canceled | |
63 | */ | |
d62a17ae | 64 | struct rfapi_withdraw { |
65 | struct rfapi_import_table *import_table; | |
fe08ba7e | 66 | struct agg_node *node; |
4b7e6066 | 67 | struct bgp_path_info *info; |
d62a17ae | 68 | safi_t safi; /* used only for bulk operations */ |
69 | /* | |
70 | * For import table node reference count checking (i.e., debugging). | |
71 | * Normally when a timer expires, lockoffset should be 0. However, if | |
72 | * the timer expiration function is called directly (e.g., | |
73 | * rfapiExpireVpnNow), the node could be locked by a preceding | |
fe08ba7e DS |
74 | * agg_route_top() or agg_route_next() in a loop, so we need to pass |
75 | * this value in. | |
d62a17ae | 76 | */ |
77 | int lockoffset; | |
65efcfce LB |
78 | }; |
79 | ||
d62a17ae | 80 | /* |
65efcfce LB |
81 | * DEBUG FUNCTION |
82 | * It's evil and fiendish. It's compiler-dependent. | |
83 | * ? Might need LDFLAGS -rdynamic to produce all function names | |
84 | */ | |
d62a17ae | 85 | void rfapiDebugBacktrace(void) |
65efcfce LB |
86 | { |
87 | #ifdef HAVE_GLIBC_BACKTRACE | |
88 | #define RFAPI_DEBUG_BACKTRACE_NENTRIES 200 | |
d62a17ae | 89 | void *buf[RFAPI_DEBUG_BACKTRACE_NENTRIES]; |
90 | char **syms; | |
91 | size_t i; | |
92 | size_t size; | |
65efcfce | 93 | |
d62a17ae | 94 | size = backtrace(buf, RFAPI_DEBUG_BACKTRACE_NENTRIES); |
95 | syms = backtrace_symbols(buf, size); | |
65efcfce | 96 | |
d62a17ae | 97 | for (i = 0; i < size && i < RFAPI_DEBUG_BACKTRACE_NENTRIES; ++i) { |
98 | vnc_zlog_debug_verbose("backtrace[%2zu]: %s", i, syms[i]); | |
99 | } | |
65efcfce | 100 | |
d62a17ae | 101 | free(syms); |
65efcfce LB |
102 | #else |
103 | #endif | |
104 | } | |
105 | ||
106 | /* | |
107 | * DEBUG FUNCTION | |
108 | * Count remote routes and compare with actively-maintained values. | |
109 | * Abort if they disagree. | |
110 | */ | |
4d762f26 | 111 | void rfapiCheckRouteCount(void) |
65efcfce | 112 | { |
d62a17ae | 113 | struct bgp *bgp = bgp_get_default(); |
114 | struct rfapi *h; | |
115 | struct rfapi_import_table *it; | |
116 | afi_t afi; | |
117 | ||
118 | assert(bgp); | |
119 | ||
120 | h = bgp->rfapi; | |
121 | assert(h); | |
122 | ||
123 | for (it = h->imports; it; it = it->next) { | |
124 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
125 | ||
fe08ba7e DS |
126 | struct agg_table *rt; |
127 | struct agg_node *rn; | |
d62a17ae | 128 | |
129 | int holddown_count = 0; | |
130 | int local_count = 0; | |
131 | int imported_count = 0; | |
132 | int remote_count = 0; | |
133 | ||
134 | rt = it->imported_vpn[afi]; | |
135 | ||
fe08ba7e DS |
136 | for (rn = agg_route_top(rt); rn; |
137 | rn = agg_route_next(rn)) { | |
40381db7 | 138 | struct bgp_path_info *bpi; |
4b7e6066 | 139 | struct bgp_path_info *next; |
d62a17ae | 140 | |
40381db7 DS |
141 | for (bpi = rn->info; bpi; bpi = next) { |
142 | next = bpi->next; | |
d62a17ae | 143 | |
40381db7 | 144 | if (CHECK_FLAG(bpi->flags, |
1defdda8 | 145 | BGP_PATH_REMOVED)) { |
d62a17ae | 146 | ++holddown_count; |
147 | ||
148 | } else { | |
40381db7 | 149 | if (RFAPI_LOCAL_BI(bpi)) { |
d62a17ae | 150 | ++local_count; |
151 | } else { | |
152 | if (RFAPI_DIRECT_IMPORT_BI( | |
40381db7 | 153 | bpi)) { |
d62a17ae | 154 | ++imported_count; |
155 | } else { | |
156 | ++remote_count; | |
157 | } | |
158 | } | |
159 | } | |
160 | } | |
161 | } | |
162 | ||
163 | if (it->holddown_count[afi] != holddown_count) { | |
164 | vnc_zlog_debug_verbose( | |
165 | "%s: it->holddown_count %d != holddown_count %d", | |
166 | __func__, it->holddown_count[afi], | |
167 | holddown_count); | |
168 | assert(0); | |
169 | } | |
170 | if (it->remote_count[afi] != remote_count) { | |
171 | vnc_zlog_debug_verbose( | |
172 | "%s: it->remote_count %d != remote_count %d", | |
173 | __func__, it->remote_count[afi], | |
174 | remote_count); | |
175 | assert(0); | |
176 | } | |
177 | if (it->imported_count[afi] != imported_count) { | |
178 | vnc_zlog_debug_verbose( | |
179 | "%s: it->imported_count %d != imported_count %d", | |
180 | __func__, it->imported_count[afi], | |
181 | imported_count); | |
182 | assert(0); | |
183 | } | |
184 | } | |
185 | } | |
65efcfce LB |
186 | } |
187 | ||
1e20238a | 188 | #ifdef DEBUG_ROUTE_COUNTERS |
65efcfce LB |
189 | #define VNC_ITRCCK do {rfapiCheckRouteCount();} while (0) |
190 | #else | |
191 | #define VNC_ITRCCK | |
192 | #endif | |
193 | ||
194 | /* | |
195 | * Validate reference count for a node in an import table | |
196 | * | |
197 | * Normally lockoffset is 0 for nodes in quiescent state. However, | |
fe08ba7e | 198 | * agg_unlock_node will delete the node if it is called when |
65efcfce LB |
199 | * node->lock == 1, and we have to validate the refcount before |
200 | * the node is deleted. In this case, we specify lockoffset 1. | |
201 | */ | |
fe08ba7e | 202 | void rfapiCheckRefcount(struct agg_node *rn, safi_t safi, int lockoffset) |
65efcfce | 203 | { |
40381db7 | 204 | unsigned int count_bpi = 0; |
d62a17ae | 205 | unsigned int count_monitor = 0; |
40381db7 | 206 | struct bgp_path_info *bpi; |
d62a17ae | 207 | struct rfapi_monitor_encap *hme; |
208 | struct rfapi_monitor_vpn *hmv; | |
209 | ||
40381db7 DS |
210 | for (bpi = rn->info; bpi; bpi = bpi->next) |
211 | ++count_bpi; | |
d62a17ae | 212 | |
213 | ||
214 | if (rn->aggregate) { | |
215 | ++count_monitor; /* rfapi_it_extra */ | |
216 | ||
217 | switch (safi) { | |
218 | void *cursor; | |
219 | int rc; | |
220 | ||
221 | case SAFI_ENCAP: | |
222 | for (hme = RFAPI_MONITOR_ENCAP(rn); hme; | |
223 | hme = hme->next) | |
224 | ++count_monitor; | |
225 | break; | |
226 | ||
227 | case SAFI_MPLS_VPN: | |
228 | ||
229 | for (hmv = RFAPI_MONITOR_VPN(rn); hmv; hmv = hmv->next) | |
230 | ++count_monitor; | |
231 | ||
232 | if (RFAPI_MONITOR_EXTERIOR(rn)->source) { | |
233 | ++count_monitor; /* sl */ | |
234 | cursor = NULL; | |
235 | for (rc = skiplist_next( | |
236 | RFAPI_MONITOR_EXTERIOR(rn)->source, | |
237 | NULL, NULL, &cursor); | |
238 | !rc; | |
239 | rc = skiplist_next( | |
240 | RFAPI_MONITOR_EXTERIOR(rn)->source, | |
241 | NULL, NULL, &cursor)) { | |
242 | ||
243 | ++count_monitor; /* sl entry */ | |
244 | } | |
245 | } | |
246 | break; | |
247 | ||
58cf0823 DS |
248 | case SAFI_UNSPEC: |
249 | case SAFI_UNICAST: | |
250 | case SAFI_MULTICAST: | |
251 | case SAFI_EVPN: | |
252 | case SAFI_LABELED_UNICAST: | |
253 | case SAFI_FLOWSPEC: | |
254 | case SAFI_MAX: | |
255 | assert(!"Passed in safi should be impossible"); | |
d62a17ae | 256 | } |
257 | } | |
258 | ||
c10e14e9 DS |
259 | if (count_bpi + count_monitor + lockoffset |
260 | != agg_node_get_lock_count(rn)) { | |
d62a17ae | 261 | vnc_zlog_debug_verbose( |
40381db7 DS |
262 | "%s: count_bpi=%d, count_monitor=%d, lockoffset=%d, rn->lock=%d", |
263 | __func__, count_bpi, count_monitor, lockoffset, | |
c10e14e9 | 264 | agg_node_get_lock_count(rn)); |
d62a17ae | 265 | assert(0); |
266 | } | |
65efcfce LB |
267 | } |
268 | ||
269 | /* | |
270 | * Perform deferred rfapi_close operations that were queued | |
271 | * during callbacks. | |
272 | */ | |
d62a17ae | 273 | static wq_item_status rfapi_deferred_close_workfunc(struct work_queue *q, |
274 | void *data) | |
65efcfce | 275 | { |
d62a17ae | 276 | struct rfapi_descriptor *rfd = data; |
277 | struct rfapi *h = q->spec.data; | |
278 | ||
279 | assert(!(h->flags & RFAPI_INCALLBACK)); | |
280 | rfapi_close(rfd); | |
281 | vnc_zlog_debug_verbose("%s: completed deferred close on handle %p", | |
282 | __func__, rfd); | |
283 | return WQ_SUCCESS; | |
65efcfce LB |
284 | } |
285 | ||
286 | /* | |
287 | * Extract layer 2 option from Encap TLVS in BGP attrs | |
288 | */ | |
d62a17ae | 289 | int rfapiGetL2o(struct attr *attr, struct rfapi_l2address_option *l2o) |
65efcfce | 290 | { |
d62a17ae | 291 | if (attr) { |
d62a17ae | 292 | struct bgp_attr_encap_subtlv *pEncap; |
293 | ||
91ebf12c | 294 | for (pEncap = bgp_attr_get_vnc_subtlvs(attr); pEncap; |
d62a17ae | 295 | pEncap = pEncap->next) { |
296 | ||
297 | if (pEncap->type == BGP_VNC_SUBTLV_TYPE_RFPOPTION) { | |
298 | if (pEncap->value[0] | |
299 | == RFAPI_VN_OPTION_TYPE_L2ADDR) { | |
300 | ||
301 | if (pEncap->value[1] == 14) { | |
302 | memcpy(l2o->macaddr.octet, | |
303 | pEncap->value + 2, | |
28328ea9 | 304 | ETH_ALEN); |
d62a17ae | 305 | l2o->label = |
306 | ((pEncap->value[10] | |
307 | >> 4) | |
308 | & 0x0f) | |
309 | + ((pEncap->value[9] | |
310 | << 4) | |
311 | & 0xff0) | |
312 | + ((pEncap->value[8] | |
313 | << 12) | |
314 | & 0xff000); | |
315 | ||
316 | l2o->local_nve_id = | |
317 | pEncap->value[12]; | |
318 | ||
319 | l2o->logical_net_id = | |
320 | (pEncap->value[15] | |
321 | & 0xff) | |
322 | + ((pEncap->value[14] | |
323 | << 8) | |
324 | & 0xff00) | |
325 | + ((pEncap->value[13] | |
326 | << 16) | |
327 | & 0xff0000); | |
328 | } | |
329 | ||
330 | return 0; | |
331 | } | |
332 | } | |
333 | } | |
334 | } | |
335 | ||
336 | return ENOENT; | |
65efcfce LB |
337 | } |
338 | ||
339 | /* | |
340 | * Extract the lifetime from the Tunnel Encap attribute of a route in | |
341 | * an import table | |
342 | */ | |
d62a17ae | 343 | int rfapiGetVncLifetime(struct attr *attr, uint32_t *lifetime) |
65efcfce | 344 | { |
d62a17ae | 345 | struct bgp_attr_encap_subtlv *pEncap; |
65efcfce | 346 | |
d62a17ae | 347 | *lifetime = RFAPI_INFINITE_LIFETIME; /* default to infinite */ |
65efcfce | 348 | |
d62a17ae | 349 | if (attr) { |
65efcfce | 350 | |
91ebf12c | 351 | for (pEncap = bgp_attr_get_vnc_subtlvs(attr); pEncap; |
d62a17ae | 352 | pEncap = pEncap->next) { |
65efcfce | 353 | |
d62a17ae | 354 | if (pEncap->type |
355 | == BGP_VNC_SUBTLV_TYPE_LIFETIME) { /* lifetime */ | |
356 | if (pEncap->length == 4) { | |
357 | memcpy(lifetime, pEncap->value, 4); | |
358 | *lifetime = ntohl(*lifetime); | |
359 | return 0; | |
360 | } | |
361 | } | |
362 | } | |
363 | } | |
65efcfce | 364 | |
d62a17ae | 365 | return ENOENT; |
65efcfce LB |
366 | } |
367 | ||
65efcfce LB |
368 | /* |
369 | * Look for UN address in Encap attribute | |
370 | */ | |
d62a17ae | 371 | int rfapiGetVncTunnelUnAddr(struct attr *attr, struct prefix *p) |
65efcfce | 372 | { |
d62a17ae | 373 | struct bgp_attr_encap_subtlv *pEncap; |
f4bd90c5 | 374 | bgp_encap_types tun_type = BGP_ENCAP_TYPE_MPLS;/*Default tunnel type*/ |
d62a17ae | 375 | |
f4bd90c5 | 376 | bgp_attr_extcom_tunnel_type(attr, &tun_type); |
d62a17ae | 377 | if (tun_type == BGP_ENCAP_TYPE_MPLS) { |
378 | if (!p) | |
379 | return 0; | |
380 | /* MPLS carries UN address in next hop */ | |
381 | rfapiNexthop2Prefix(attr, p); | |
c7ca5ccf | 382 | if (p->family != AF_UNSPEC) |
d62a17ae | 383 | return 0; |
384 | ||
385 | return ENOENT; | |
386 | } | |
387 | if (attr) { | |
388 | for (pEncap = attr->encap_subtlvs; pEncap; | |
389 | pEncap = pEncap->next) { | |
390 | ||
391 | if (pEncap->type | |
392 | == BGP_ENCAP_SUBTLV_TYPE_REMOTE_ENDPOINT) { /* un | |
393 | addr | |
394 | */ | |
395 | switch (pEncap->length) { | |
396 | case 8: | |
397 | if (p) { | |
398 | p->family = AF_INET; | |
30360041 | 399 | p->prefixlen = IPV4_MAX_BITLEN; |
d62a17ae | 400 | memcpy(p->u.val, pEncap->value, |
401 | 4); | |
402 | } | |
403 | return 0; | |
404 | ||
405 | case 20: | |
406 | if (p) { | |
407 | p->family = AF_INET6; | |
135e9bdb | 408 | p->prefixlen = IPV6_MAX_BITLEN; |
d62a17ae | 409 | memcpy(p->u.val, pEncap->value, |
410 | 16); | |
411 | } | |
412 | return 0; | |
413 | } | |
414 | } | |
415 | } | |
416 | } | |
417 | ||
418 | return ENOENT; | |
65efcfce LB |
419 | } |
420 | ||
421 | /* | |
422 | * Get UN address wherever it might be | |
423 | */ | |
40381db7 | 424 | int rfapiGetUnAddrOfVpnBi(struct bgp_path_info *bpi, struct prefix *p) |
65efcfce | 425 | { |
d62a17ae | 426 | /* If it's in this route's VNC attribute, we're done */ |
40381db7 | 427 | if (!rfapiGetVncTunnelUnAddr(bpi->attr, p)) |
d62a17ae | 428 | return 0; |
429 | /* | |
430 | * Otherwise, see if it's cached from a corresponding ENCAP SAFI | |
431 | * advertisement | |
432 | */ | |
40381db7 DS |
433 | if (bpi->extra) { |
434 | switch (bpi->extra->vnc.import.un_family) { | |
d62a17ae | 435 | case AF_INET: |
436 | if (p) { | |
40381db7 DS |
437 | p->family = bpi->extra->vnc.import.un_family; |
438 | p->u.prefix4 = bpi->extra->vnc.import.un.addr4; | |
30360041 | 439 | p->prefixlen = IPV4_MAX_BITLEN; |
d62a17ae | 440 | } |
441 | return 0; | |
442 | case AF_INET6: | |
443 | if (p) { | |
40381db7 DS |
444 | p->family = bpi->extra->vnc.import.un_family; |
445 | p->u.prefix6 = bpi->extra->vnc.import.un.addr6; | |
135e9bdb | 446 | p->prefixlen = IPV6_MAX_BITLEN; |
d62a17ae | 447 | } |
448 | return 0; | |
449 | default: | |
450 | if (p) | |
c7ca5ccf | 451 | p->family = AF_UNSPEC; |
1e20238a | 452 | #ifdef DEBUG_ENCAP_MONITOR |
d62a17ae | 453 | vnc_zlog_debug_verbose( |
40381db7 | 454 | "%s: bpi->extra->vnc.import.un_family is 0, no UN addr", |
d62a17ae | 455 | __func__); |
65efcfce | 456 | #endif |
d62a17ae | 457 | break; |
458 | } | |
459 | } | |
65efcfce | 460 | |
d62a17ae | 461 | return ENOENT; |
65efcfce LB |
462 | } |
463 | ||
464 | ||
465 | /* | |
9b6d8fcf | 466 | * Make a new bgp_path_info from gathered parameters |
65efcfce | 467 | */ |
4b7e6066 DS |
468 | static struct bgp_path_info *rfapiBgpInfoCreate(struct attr *attr, |
469 | struct peer *peer, void *rfd, | |
470 | struct prefix_rd *prd, | |
471 | uint8_t type, uint8_t sub_type, | |
472 | uint32_t *label) | |
65efcfce | 473 | { |
4b7e6066 | 474 | struct bgp_path_info *new; |
d62a17ae | 475 | |
9591da26 DS |
476 | new = info_make(type, sub_type, 0, peer, attr, NULL); |
477 | ||
05864da7 | 478 | new->attr = bgp_attr_intern(attr); |
d62a17ae | 479 | |
18ee8310 | 480 | bgp_path_info_extra_get(new); |
d62a17ae | 481 | if (prd) { |
482 | new->extra->vnc.import.rd = *prd; | |
98b7e975 | 483 | new->extra->vnc.import.create_time = monotime(NULL); |
d62a17ae | 484 | } |
485 | if (label) | |
317f1fe0 | 486 | encode_label(*label, &new->extra->label[0]); |
9591da26 | 487 | |
d62a17ae | 488 | peer_lock(peer); |
489 | ||
490 | return new; | |
65efcfce LB |
491 | } |
492 | ||
493 | /* | |
9b6d8fcf | 494 | * Frees bgp_path_info as used in import tables (parts are not |
65efcfce LB |
495 | * allocated exactly the way they are in the main RIBs) |
496 | */ | |
4b7e6066 | 497 | static void rfapiBgpInfoFree(struct bgp_path_info *goner) |
65efcfce | 498 | { |
d62a17ae | 499 | if (!goner) |
500 | return; | |
501 | ||
502 | if (goner->peer) { | |
503 | vnc_zlog_debug_verbose("%s: calling peer_unlock(%p), #%d", | |
504 | __func__, goner->peer, | |
505 | goner->peer->lock); | |
506 | peer_unlock(goner->peer); | |
507 | } | |
508 | ||
05864da7 DS |
509 | bgp_attr_unintern(&goner->attr); |
510 | ||
a2e219fe PG |
511 | if (goner->extra) |
512 | bgp_path_info_extra_free(&goner->extra); | |
d62a17ae | 513 | XFREE(MTYPE_BGP_ROUTE, goner); |
65efcfce LB |
514 | } |
515 | ||
d62a17ae | 516 | struct rfapi_import_table *rfapiMacImportTableGetNoAlloc(struct bgp *bgp, |
517 | uint32_t lni) | |
65efcfce | 518 | { |
d62a17ae | 519 | struct rfapi *h; |
520 | struct rfapi_import_table *it = NULL; | |
521 | uintptr_t lni_as_ptr = lni; | |
65efcfce | 522 | |
d62a17ae | 523 | h = bgp->rfapi; |
524 | if (!h) | |
525 | return NULL; | |
65efcfce | 526 | |
d62a17ae | 527 | if (!h->import_mac) |
528 | return NULL; | |
65efcfce | 529 | |
d62a17ae | 530 | if (skiplist_search(h->import_mac, (void *)lni_as_ptr, (void **)&it)) |
531 | return NULL; | |
65efcfce | 532 | |
d62a17ae | 533 | return it; |
65efcfce LB |
534 | } |
535 | ||
d62a17ae | 536 | struct rfapi_import_table *rfapiMacImportTableGet(struct bgp *bgp, uint32_t lni) |
65efcfce | 537 | { |
d62a17ae | 538 | struct rfapi *h; |
539 | struct rfapi_import_table *it = NULL; | |
540 | uintptr_t lni_as_ptr = lni; | |
541 | ||
542 | h = bgp->rfapi; | |
543 | assert(h); | |
544 | ||
545 | if (!h->import_mac) { | |
546 | /* default cmp is good enough for LNI */ | |
547 | h->import_mac = skiplist_new(0, NULL, NULL); | |
548 | } | |
549 | ||
550 | if (skiplist_search(h->import_mac, (void *)lni_as_ptr, (void **)&it)) { | |
551 | ||
552 | struct ecommunity *enew; | |
553 | struct ecommunity_val eval; | |
554 | afi_t afi; | |
555 | ||
556 | it = XCALLOC(MTYPE_RFAPI_IMPORTTABLE, | |
557 | sizeof(struct rfapi_import_table)); | |
558 | /* set RT list of new import table based on LNI */ | |
559 | memset((char *)&eval, 0, sizeof(eval)); | |
560 | eval.val[0] = 0; /* VNC L2VPN */ | |
561 | eval.val[1] = 2; /* VNC L2VPN */ | |
562 | eval.val[5] = (lni >> 16) & 0xff; | |
563 | eval.val[6] = (lni >> 8) & 0xff; | |
564 | eval.val[7] = (lni >> 0) & 0xff; | |
565 | ||
566 | enew = ecommunity_new(); | |
1207a5bc | 567 | ecommunity_add_val(enew, &eval, false, false); |
d62a17ae | 568 | it->rt_import_list = enew; |
569 | ||
570 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
fe08ba7e DS |
571 | it->imported_vpn[afi] = agg_table_init(); |
572 | it->imported_encap[afi] = agg_table_init(); | |
d62a17ae | 573 | } |
574 | ||
575 | it->l2_logical_net_id = lni; | |
576 | ||
577 | skiplist_insert(h->import_mac, (void *)lni_as_ptr, it); | |
578 | } | |
579 | ||
580 | assert(it); | |
581 | return it; | |
65efcfce LB |
582 | } |
583 | ||
584 | /* | |
585 | * Implement MONITOR_MOVE_SHORTER(original_node) from | |
586 | * RFAPI-Import-Event-Handling.txt | |
d62a17ae | 587 | * |
65efcfce LB |
588 | * Returns pointer to the list of moved monitors |
589 | */ | |
590 | static struct rfapi_monitor_vpn * | |
fe08ba7e | 591 | rfapiMonitorMoveShorter(struct agg_node *original_vpn_node, int lockoffset) |
65efcfce | 592 | { |
40381db7 | 593 | struct bgp_path_info *bpi; |
fe08ba7e | 594 | struct agg_node *par; |
d62a17ae | 595 | struct rfapi_monitor_vpn *m; |
596 | struct rfapi_monitor_vpn *mlast; | |
597 | struct rfapi_monitor_vpn *moved; | |
598 | int movecount = 0; | |
599 | int parent_already_refcounted = 0; | |
65efcfce | 600 | |
d62a17ae | 601 | RFAPI_CHECK_REFCOUNT(original_vpn_node, SAFI_MPLS_VPN, lockoffset); |
65efcfce | 602 | |
1e20238a | 603 | #ifdef DEBUG_MONITOR_MOVE_SHORTER |
d62a17ae | 604 | { |
2dbe669b DA |
605 | vnc_zlog_debug_verbose("%s: called with node pfx=%pFX", |
606 | __func__, &original_vpn_node->p); | |
d62a17ae | 607 | } |
65efcfce LB |
608 | #endif |
609 | ||
d62a17ae | 610 | /* |
40381db7 | 611 | * 1. If there is at least one bpi (either regular route or |
d62a17ae | 612 | * route marked as withdrawn, with a pending timer) at |
613 | * original_node with a valid UN address, we're done. Return. | |
614 | */ | |
40381db7 | 615 | for (bpi = original_vpn_node->info; bpi; bpi = bpi->next) { |
d62a17ae | 616 | struct prefix pfx; |
617 | ||
40381db7 | 618 | if (!rfapiGetUnAddrOfVpnBi(bpi, &pfx)) { |
1e20238a | 619 | #ifdef DEBUG_MONITOR_MOVE_SHORTER |
d62a17ae | 620 | vnc_zlog_debug_verbose( |
621 | "%s: have valid UN at original node, no change", | |
622 | __func__); | |
65efcfce | 623 | #endif |
d62a17ae | 624 | return NULL; |
625 | } | |
626 | } | |
627 | ||
628 | /* | |
629 | * 2. Travel up the tree (toward less-specific prefixes) from | |
630 | * original_node to find the first node that has at least | |
631 | * one route (even if it is only a withdrawn route) with a | |
632 | * valid UN address. Call this node "Node P." | |
633 | */ | |
fe08ba7e DS |
634 | for (par = agg_node_parent(original_vpn_node); par; |
635 | par = agg_node_parent(par)) { | |
40381db7 | 636 | for (bpi = par->info; bpi; bpi = bpi->next) { |
d62a17ae | 637 | struct prefix pfx; |
40381db7 | 638 | if (!rfapiGetUnAddrOfVpnBi(bpi, &pfx)) { |
d62a17ae | 639 | break; |
640 | } | |
641 | } | |
40381db7 | 642 | if (bpi) |
d62a17ae | 643 | break; |
644 | } | |
645 | ||
646 | if (par) { | |
647 | RFAPI_CHECK_REFCOUNT(par, SAFI_MPLS_VPN, 0); | |
648 | } | |
649 | ||
650 | /* | |
651 | * If no less-specific routes, try to use the 0/0 node | |
652 | */ | |
653 | if (!par) { | |
26a3ffd6 | 654 | const struct prefix *p; |
d62a17ae | 655 | /* this isn't necessarily 0/0 */ |
fe08ba7e | 656 | par = agg_route_table_top(original_vpn_node); |
d62a17ae | 657 | |
26a3ffd6 DS |
658 | if (par) |
659 | p = agg_node_get_prefix(par); | |
d62a17ae | 660 | /* |
661 | * If we got the top node but it wasn't 0/0, | |
662 | * ignore it | |
663 | */ | |
26a3ffd6 | 664 | if (par && p->prefixlen) { |
fe08ba7e | 665 | agg_unlock_node(par); /* maybe free */ |
d62a17ae | 666 | par = NULL; |
667 | } | |
668 | ||
669 | if (par) { | |
670 | ++parent_already_refcounted; | |
671 | } | |
672 | } | |
673 | ||
674 | /* | |
675 | * Create 0/0 node if it isn't there | |
676 | */ | |
677 | if (!par) { | |
678 | struct prefix pfx_default; | |
26a3ffd6 | 679 | const struct prefix *p = agg_node_get_prefix(original_vpn_node); |
d62a17ae | 680 | |
681 | memset(&pfx_default, 0, sizeof(pfx_default)); | |
26a3ffd6 | 682 | pfx_default.family = p->family; |
d62a17ae | 683 | |
684 | /* creates default node if none exists */ | |
fe08ba7e DS |
685 | par = agg_node_get(agg_get_table(original_vpn_node), |
686 | &pfx_default); | |
d62a17ae | 687 | ++parent_already_refcounted; |
688 | } | |
689 | ||
690 | /* | |
691 | * 3. Move each of the monitors found at original_node to Node P. | |
692 | * These are "Moved Monitors." | |
693 | * | |
694 | */ | |
695 | ||
696 | /* | |
697 | * Attach at end so that the list pointer we return points | |
698 | * only to the moved routes | |
699 | */ | |
700 | for (m = RFAPI_MONITOR_VPN(par), mlast = NULL; m; | |
701 | mlast = m, m = m->next) | |
702 | ; | |
703 | ||
704 | if (mlast) { | |
705 | moved = mlast->next = RFAPI_MONITOR_VPN(original_vpn_node); | |
706 | } else { | |
707 | moved = RFAPI_MONITOR_VPN_W_ALLOC(par) = | |
708 | RFAPI_MONITOR_VPN(original_vpn_node); | |
709 | } | |
710 | if (RFAPI_MONITOR_VPN( | |
711 | original_vpn_node)) /* check agg, so not allocated */ | |
712 | RFAPI_MONITOR_VPN_W_ALLOC(original_vpn_node) = NULL; | |
713 | ||
714 | /* | |
715 | * update the node pointers on the monitors | |
716 | */ | |
717 | for (m = moved; m; m = m->next) { | |
718 | ++movecount; | |
719 | m->node = par; | |
720 | } | |
721 | ||
722 | RFAPI_CHECK_REFCOUNT(par, SAFI_MPLS_VPN, | |
723 | parent_already_refcounted - movecount); | |
724 | while (movecount > parent_already_refcounted) { | |
fe08ba7e | 725 | agg_lock_node(par); |
d62a17ae | 726 | ++parent_already_refcounted; |
727 | } | |
728 | while (movecount < parent_already_refcounted) { | |
729 | /* unlikely, but code defensively */ | |
fe08ba7e | 730 | agg_unlock_node(par); |
d62a17ae | 731 | --parent_already_refcounted; |
732 | } | |
733 | RFAPI_CHECK_REFCOUNT(original_vpn_node, SAFI_MPLS_VPN, | |
734 | movecount + lockoffset); | |
735 | while (movecount--) { | |
fe08ba7e | 736 | agg_unlock_node(original_vpn_node); |
d62a17ae | 737 | } |
65efcfce | 738 | |
1e20238a | 739 | #ifdef DEBUG_MONITOR_MOVE_SHORTER |
d62a17ae | 740 | { |
2dbe669b DA |
741 | vnc_zlog_debug_verbose("%s: moved to node pfx=%pFX", __func__, |
742 | &par->p); | |
d62a17ae | 743 | } |
65efcfce LB |
744 | #endif |
745 | ||
746 | ||
d62a17ae | 747 | return moved; |
65efcfce LB |
748 | } |
749 | ||
750 | /* | |
751 | * Implement MONITOR_MOVE_LONGER(new_node) from | |
752 | * RFAPI-Import-Event-Handling.txt | |
753 | */ | |
fe08ba7e | 754 | static void rfapiMonitorMoveLonger(struct agg_node *new_vpn_node) |
65efcfce | 755 | { |
d62a17ae | 756 | struct rfapi_monitor_vpn *monitor; |
757 | struct rfapi_monitor_vpn *mlast; | |
40381db7 | 758 | struct bgp_path_info *bpi; |
fe08ba7e | 759 | struct agg_node *par; |
26a3ffd6 | 760 | const struct prefix *new_vpn_node_p = agg_node_get_prefix(new_vpn_node); |
d62a17ae | 761 | |
762 | RFAPI_CHECK_REFCOUNT(new_vpn_node, SAFI_MPLS_VPN, 0); | |
763 | ||
764 | /* | |
765 | * Make sure we have at least one valid route at the new node | |
766 | */ | |
40381db7 | 767 | for (bpi = new_vpn_node->info; bpi; bpi = bpi->next) { |
d62a17ae | 768 | struct prefix pfx; |
40381db7 | 769 | if (!rfapiGetUnAddrOfVpnBi(bpi, &pfx)) |
d62a17ae | 770 | break; |
771 | } | |
772 | ||
40381db7 | 773 | if (!bpi) { |
d62a17ae | 774 | vnc_zlog_debug_verbose( |
775 | "%s: no valid routes at node %p, so not attempting moves", | |
776 | __func__, new_vpn_node); | |
777 | return; | |
778 | } | |
779 | ||
780 | /* | |
781 | * Find first parent node that has monitors | |
782 | */ | |
fe08ba7e DS |
783 | for (par = agg_node_parent(new_vpn_node); par; |
784 | par = agg_node_parent(par)) { | |
d62a17ae | 785 | if (RFAPI_MONITOR_VPN(par)) |
786 | break; | |
787 | } | |
788 | ||
789 | if (!par) { | |
790 | vnc_zlog_debug_verbose( | |
791 | "%s: no parent nodes with monitors, done", __func__); | |
792 | return; | |
793 | } | |
794 | ||
795 | /* | |
796 | * Check each of these monitors to see of their longest-match | |
797 | * is now the updated node. Move any such monitors to the more- | |
798 | * specific updated node | |
799 | */ | |
800 | for (mlast = NULL, monitor = RFAPI_MONITOR_VPN(par); monitor;) { | |
d62a17ae | 801 | /* |
802 | * If new longest match for monitor prefix is the new | |
803 | * route's prefix, move monitor to new route's prefix | |
804 | */ | |
26a3ffd6 | 805 | if (prefix_match(new_vpn_node_p, &monitor->p)) { |
d62a17ae | 806 | /* detach */ |
807 | if (mlast) { | |
808 | mlast->next = monitor->next; | |
809 | } else { | |
810 | RFAPI_MONITOR_VPN_W_ALLOC(par) = monitor->next; | |
811 | } | |
812 | ||
813 | ||
814 | /* attach */ | |
815 | monitor->next = RFAPI_MONITOR_VPN(new_vpn_node); | |
816 | RFAPI_MONITOR_VPN_W_ALLOC(new_vpn_node) = monitor; | |
817 | monitor->node = new_vpn_node; | |
818 | ||
fe08ba7e | 819 | agg_lock_node(new_vpn_node); /* incr refcount */ |
d62a17ae | 820 | |
821 | monitor = mlast ? mlast->next : RFAPI_MONITOR_VPN(par); | |
822 | ||
823 | RFAPI_CHECK_REFCOUNT(par, SAFI_MPLS_VPN, 1); | |
824 | /* decr refcount after we're done with par as this might | |
825 | * free it */ | |
fe08ba7e | 826 | agg_unlock_node(par); |
d62a17ae | 827 | |
828 | continue; | |
829 | } | |
830 | mlast = monitor; | |
831 | monitor = monitor->next; | |
832 | } | |
833 | ||
834 | RFAPI_CHECK_REFCOUNT(new_vpn_node, SAFI_MPLS_VPN, 0); | |
65efcfce LB |
835 | } |
836 | ||
837 | ||
40381db7 | 838 | static void rfapiBgpInfoChainFree(struct bgp_path_info *bpi) |
65efcfce | 839 | { |
4b7e6066 | 840 | struct bgp_path_info *next; |
d62a17ae | 841 | |
40381db7 | 842 | while (bpi) { |
d62a17ae | 843 | |
844 | /* | |
40381db7 | 845 | * If there is a timer waiting to delete this bpi, cancel |
d62a17ae | 846 | * the timer and delete immediately |
847 | */ | |
40381db7 DS |
848 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
849 | && bpi->extra->vnc.import.timer) { | |
c3aaa89a DS |
850 | struct rfapi_withdraw *wcb = |
851 | THREAD_ARG(bpi->extra->vnc.import.timer); | |
d62a17ae | 852 | |
853 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
c3aaa89a | 854 | THREAD_OFF(bpi->extra->vnc.import.timer); |
d62a17ae | 855 | } |
856 | ||
40381db7 DS |
857 | next = bpi->next; |
858 | bpi->next = NULL; | |
859 | rfapiBgpInfoFree(bpi); | |
860 | bpi = next; | |
d62a17ae | 861 | } |
65efcfce LB |
862 | } |
863 | ||
d62a17ae | 864 | static void rfapiImportTableFlush(struct rfapi_import_table *it) |
65efcfce | 865 | { |
d62a17ae | 866 | afi_t afi; |
867 | ||
868 | /* | |
869 | * Free ecommunity | |
870 | */ | |
871 | ecommunity_free(&it->rt_import_list); | |
872 | it->rt_import_list = NULL; | |
873 | ||
874 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
875 | ||
fe08ba7e | 876 | struct agg_node *rn; |
d62a17ae | 877 | |
fe08ba7e DS |
878 | for (rn = agg_route_top(it->imported_vpn[afi]); rn; |
879 | rn = agg_route_next(rn)) { | |
d62a17ae | 880 | /* |
881 | * Each route_node has: | |
882 | * aggregate: points to rfapi_it_extra with monitor | |
883 | * chain(s) | |
9b6d8fcf | 884 | * info: points to chain of bgp_path_info |
d62a17ae | 885 | */ |
9b6d8fcf | 886 | /* free bgp_path_info and its children */ |
d62a17ae | 887 | rfapiBgpInfoChainFree(rn->info); |
888 | rn->info = NULL; | |
889 | ||
890 | rfapiMonitorExtraFlush(SAFI_MPLS_VPN, rn); | |
891 | } | |
892 | ||
fe08ba7e DS |
893 | for (rn = agg_route_top(it->imported_encap[afi]); rn; |
894 | rn = agg_route_next(rn)) { | |
9b6d8fcf | 895 | /* free bgp_path_info and its children */ |
d62a17ae | 896 | rfapiBgpInfoChainFree(rn->info); |
897 | rn->info = NULL; | |
898 | ||
899 | rfapiMonitorExtraFlush(SAFI_ENCAP, rn); | |
900 | } | |
901 | ||
fe08ba7e DS |
902 | agg_table_finish(it->imported_vpn[afi]); |
903 | agg_table_finish(it->imported_encap[afi]); | |
d62a17ae | 904 | } |
905 | if (it->monitor_exterior_orphans) { | |
906 | skiplist_free(it->monitor_exterior_orphans); | |
907 | } | |
65efcfce LB |
908 | } |
909 | ||
d62a17ae | 910 | void rfapiImportTableRefDelByIt(struct bgp *bgp, |
911 | struct rfapi_import_table *it_target) | |
65efcfce | 912 | { |
d62a17ae | 913 | struct rfapi *h; |
914 | struct rfapi_import_table *it; | |
915 | struct rfapi_import_table *prev = NULL; | |
916 | ||
917 | assert(it_target); | |
918 | ||
919 | h = bgp->rfapi; | |
920 | assert(h); | |
921 | ||
922 | for (it = h->imports; it; prev = it, it = it->next) { | |
923 | if (it == it_target) | |
924 | break; | |
925 | } | |
926 | ||
927 | assert(it); | |
928 | assert(it->refcount); | |
929 | ||
930 | it->refcount -= 1; | |
931 | ||
932 | if (!it->refcount) { | |
933 | if (prev) { | |
934 | prev->next = it->next; | |
935 | } else { | |
936 | h->imports = it->next; | |
937 | } | |
938 | rfapiImportTableFlush(it); | |
939 | XFREE(MTYPE_RFAPI_IMPORTTABLE, it); | |
940 | } | |
65efcfce LB |
941 | } |
942 | ||
1e20238a | 943 | #ifdef RFAPI_REQUIRE_ENCAP_BEEC |
65efcfce LB |
944 | /* |
945 | * Look for magic BGP Encapsulation Extended Community value | |
946 | * Format in RFC 5512 Sect. 4.5 | |
947 | */ | |
d62a17ae | 948 | static int rfapiEcommunitiesMatchBeec(struct ecommunity *ecom, |
949 | bgp_encap_types type) | |
65efcfce | 950 | { |
d62a17ae | 951 | int i; |
65efcfce | 952 | |
d62a17ae | 953 | if (!ecom) |
954 | return 0; | |
65efcfce | 955 | |
d62a17ae | 956 | for (i = 0; i < (ecom->size * ECOMMUNITY_SIZE); i += ECOMMUNITY_SIZE) { |
65efcfce | 957 | |
d62a17ae | 958 | uint8_t *ep; |
65efcfce | 959 | |
d62a17ae | 960 | ep = ecom->val + i; |
65efcfce | 961 | |
d62a17ae | 962 | if (ep[0] == ECOMMUNITY_ENCODE_OPAQUE |
963 | && ep[1] == ECOMMUNITY_OPAQUE_SUBTYPE_ENCAP | |
964 | && ep[6] == ((type && 0xff00) >> 8) | |
965 | && ep[7] == (type & 0xff)) { | |
65efcfce | 966 | |
d62a17ae | 967 | return 1; |
968 | } | |
969 | } | |
970 | return 0; | |
65efcfce LB |
971 | } |
972 | #endif | |
973 | ||
d62a17ae | 974 | int rfapiEcommunitiesIntersect(struct ecommunity *e1, struct ecommunity *e2) |
65efcfce | 975 | { |
f6e07e1b | 976 | uint32_t i, j; |
d62a17ae | 977 | |
978 | if (!e1 || !e2) | |
979 | return 0; | |
980 | ||
981 | { | |
982 | char *s1, *s2; | |
983 | s1 = ecommunity_ecom2str(e1, ECOMMUNITY_FORMAT_DISPLAY, 0); | |
984 | s2 = ecommunity_ecom2str(e2, ECOMMUNITY_FORMAT_DISPLAY, 0); | |
985 | vnc_zlog_debug_verbose("%s: e1[%s], e2[%s]", __func__, s1, s2); | |
986 | XFREE(MTYPE_ECOMMUNITY_STR, s1); | |
987 | XFREE(MTYPE_ECOMMUNITY_STR, s2); | |
988 | } | |
989 | ||
990 | for (i = 0; i < e1->size; ++i) { | |
991 | for (j = 0; j < e2->size; ++j) { | |
992 | if (!memcmp(e1->val + (i * ECOMMUNITY_SIZE), | |
993 | e2->val + (j * ECOMMUNITY_SIZE), | |
994 | ECOMMUNITY_SIZE)) { | |
995 | ||
996 | return 1; | |
997 | } | |
998 | } | |
999 | } | |
1000 | return 0; | |
65efcfce LB |
1001 | } |
1002 | ||
d62a17ae | 1003 | int rfapiEcommunityGetLNI(struct ecommunity *ecom, uint32_t *lni) |
65efcfce | 1004 | { |
d62a17ae | 1005 | if (ecom) { |
f6e07e1b DS |
1006 | uint32_t i; |
1007 | ||
d62a17ae | 1008 | for (i = 0; i < ecom->size; ++i) { |
1009 | uint8_t *p = ecom->val + (i * ECOMMUNITY_SIZE); | |
1010 | ||
1011 | if ((*(p + 0) == 0x00) && (*(p + 1) == 0x02)) { | |
1012 | ||
1013 | *lni = (*(p + 5) << 16) | (*(p + 6) << 8) | |
1014 | | (*(p + 7)); | |
1015 | return 0; | |
1016 | } | |
1017 | } | |
1018 | } | |
1019 | return ENOENT; | |
65efcfce LB |
1020 | } |
1021 | ||
d62a17ae | 1022 | int rfapiEcommunityGetEthernetTag(struct ecommunity *ecom, uint16_t *tag_id) |
79799987 | 1023 | { |
d62a17ae | 1024 | struct bgp *bgp = bgp_get_default(); |
1025 | *tag_id = 0; /* default to untagged */ | |
1026 | if (ecom) { | |
f6e07e1b DS |
1027 | uint32_t i; |
1028 | ||
d62a17ae | 1029 | for (i = 0; i < ecom->size; ++i) { |
1030 | as_t as = 0; | |
1031 | int encode = 0; | |
1be1693e | 1032 | const uint8_t *p = ecom->val + (i * ECOMMUNITY_SIZE); |
d62a17ae | 1033 | |
1034 | /* High-order octet of type. */ | |
1035 | encode = *p++; | |
1036 | ||
1037 | if (*p++ == ECOMMUNITY_ROUTE_TARGET) { | |
1038 | if (encode == ECOMMUNITY_ENCODE_AS4) { | |
937652c6 | 1039 | p = ptr_get_be32(p, &as); |
d62a17ae | 1040 | } else if (encode == ECOMMUNITY_ENCODE_AS) { |
1041 | as = (*p++ << 8); | |
1042 | as |= (*p++); | |
996c9314 LB |
1043 | p += 2; /* skip next two, tag/vid |
1044 | always in lowest bytes */ | |
d62a17ae | 1045 | } |
1046 | if (as == bgp->as) { | |
1047 | *tag_id = *p++ << 8; | |
1048 | *tag_id |= (*p++); | |
1049 | return 0; | |
1050 | } | |
1051 | } | |
1052 | } | |
1053 | } | |
1054 | return ENOENT; | |
79799987 LB |
1055 | } |
1056 | ||
40381db7 | 1057 | static int rfapiVpnBiNhEqualsPt(struct bgp_path_info *bpi, |
4b7e6066 | 1058 | struct rfapi_ip_addr *hpt) |
65efcfce | 1059 | { |
d62a17ae | 1060 | uint8_t family; |
65efcfce | 1061 | |
40381db7 | 1062 | if (!hpt || !bpi) |
d62a17ae | 1063 | return 0; |
65efcfce | 1064 | |
40381db7 | 1065 | family = BGP_MP_NEXTHOP_FAMILY(bpi->attr->mp_nexthop_len); |
65efcfce | 1066 | |
d62a17ae | 1067 | if (hpt->addr_family != family) |
1068 | return 0; | |
65efcfce | 1069 | |
d62a17ae | 1070 | switch (family) { |
1071 | case AF_INET: | |
40381db7 | 1072 | if (bpi->attr->mp_nexthop_global_in.s_addr |
d62a17ae | 1073 | != hpt->addr.v4.s_addr) |
1074 | return 0; | |
1075 | break; | |
65efcfce | 1076 | |
d62a17ae | 1077 | case AF_INET6: |
40381db7 | 1078 | if (IPV6_ADDR_CMP(&bpi->attr->mp_nexthop_global, &hpt->addr.v6)) |
d62a17ae | 1079 | return 0; |
1080 | break; | |
65efcfce | 1081 | |
d62a17ae | 1082 | default: |
1083 | return 0; | |
d62a17ae | 1084 | } |
65efcfce | 1085 | |
d62a17ae | 1086 | return 1; |
65efcfce LB |
1087 | } |
1088 | ||
1089 | ||
1090 | /* | |
1091 | * Compare 2 VPN BIs. Return true if they have the same VN and UN addresses | |
1092 | */ | |
40381db7 DS |
1093 | static int rfapiVpnBiSamePtUn(struct bgp_path_info *bpi1, |
1094 | struct bgp_path_info *bpi2) | |
65efcfce | 1095 | { |
d62a17ae | 1096 | struct prefix pfx_un1; |
1097 | struct prefix pfx_un2; | |
1098 | ||
40381db7 | 1099 | if (!bpi1 || !bpi2) |
d62a17ae | 1100 | return 0; |
1101 | ||
d62a17ae | 1102 | /* |
1103 | * VN address comparisons | |
1104 | */ | |
1105 | ||
40381db7 DS |
1106 | if (BGP_MP_NEXTHOP_FAMILY(bpi1->attr->mp_nexthop_len) |
1107 | != BGP_MP_NEXTHOP_FAMILY(bpi2->attr->mp_nexthop_len)) { | |
d62a17ae | 1108 | return 0; |
1109 | } | |
1110 | ||
40381db7 | 1111 | switch (BGP_MP_NEXTHOP_FAMILY(bpi1->attr->mp_nexthop_len)) { |
d62a17ae | 1112 | case AF_INET: |
40381db7 DS |
1113 | if (bpi1->attr->mp_nexthop_global_in.s_addr |
1114 | != bpi2->attr->mp_nexthop_global_in.s_addr) | |
d62a17ae | 1115 | return 0; |
1116 | break; | |
1117 | ||
1118 | case AF_INET6: | |
40381db7 DS |
1119 | if (IPV6_ADDR_CMP(&bpi1->attr->mp_nexthop_global, |
1120 | &bpi2->attr->mp_nexthop_global)) | |
d62a17ae | 1121 | return 0; |
1122 | break; | |
1123 | ||
1124 | default: | |
1125 | return 0; | |
d62a17ae | 1126 | } |
1127 | ||
fa3bf3a2 MS |
1128 | memset(&pfx_un1, 0, sizeof(pfx_un1)); |
1129 | memset(&pfx_un2, 0, sizeof(pfx_un2)); | |
1130 | ||
d62a17ae | 1131 | /* |
1132 | * UN address comparisons | |
1133 | */ | |
40381db7 DS |
1134 | if (rfapiGetVncTunnelUnAddr(bpi1->attr, &pfx_un1)) { |
1135 | if (bpi1->extra) { | |
1136 | pfx_un1.family = bpi1->extra->vnc.import.un_family; | |
1137 | switch (bpi1->extra->vnc.import.un_family) { | |
d62a17ae | 1138 | case AF_INET: |
1139 | pfx_un1.u.prefix4 = | |
40381db7 | 1140 | bpi1->extra->vnc.import.un.addr4; |
d62a17ae | 1141 | break; |
1142 | case AF_INET6: | |
1143 | pfx_un1.u.prefix6 = | |
40381db7 | 1144 | bpi1->extra->vnc.import.un.addr6; |
d62a17ae | 1145 | break; |
1146 | default: | |
c7ca5ccf | 1147 | pfx_un1.family = AF_UNSPEC; |
d62a17ae | 1148 | break; |
1149 | } | |
1150 | } | |
1151 | } | |
1152 | ||
40381db7 DS |
1153 | if (rfapiGetVncTunnelUnAddr(bpi2->attr, &pfx_un2)) { |
1154 | if (bpi2->extra) { | |
1155 | pfx_un2.family = bpi2->extra->vnc.import.un_family; | |
1156 | switch (bpi2->extra->vnc.import.un_family) { | |
d62a17ae | 1157 | case AF_INET: |
1158 | pfx_un2.u.prefix4 = | |
40381db7 | 1159 | bpi2->extra->vnc.import.un.addr4; |
d62a17ae | 1160 | break; |
1161 | case AF_INET6: | |
1162 | pfx_un2.u.prefix6 = | |
40381db7 | 1163 | bpi2->extra->vnc.import.un.addr6; |
d62a17ae | 1164 | break; |
1165 | default: | |
c7ca5ccf | 1166 | pfx_un2.family = AF_UNSPEC; |
d62a17ae | 1167 | break; |
1168 | } | |
1169 | } | |
1170 | } | |
1171 | ||
c7ca5ccf | 1172 | if (pfx_un1.family == AF_UNSPEC || pfx_un2.family == AF_UNSPEC) |
d62a17ae | 1173 | return 0; |
1174 | ||
1175 | if (pfx_un1.family != pfx_un2.family) | |
1176 | return 0; | |
1177 | ||
1178 | switch (pfx_un1.family) { | |
1179 | case AF_INET: | |
996c9314 | 1180 | if (!IPV4_ADDR_SAME(&pfx_un1.u.prefix4, &pfx_un2.u.prefix4)) |
d62a17ae | 1181 | return 0; |
1182 | break; | |
1183 | case AF_INET6: | |
1184 | if (!IPV6_ADDR_SAME(&pfx_un1.u.prefix6, &pfx_un2.u.prefix6)) | |
1185 | return 0; | |
1186 | break; | |
1187 | } | |
1188 | ||
1189 | ||
1190 | return 1; | |
65efcfce LB |
1191 | } |
1192 | ||
d62a17ae | 1193 | uint8_t rfapiRfpCost(struct attr *attr) |
65efcfce | 1194 | { |
d62a17ae | 1195 | if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF)) { |
1196 | if (attr->local_pref > 255) { | |
1197 | return 0; | |
1198 | } | |
1199 | return 255 - attr->local_pref; | |
1200 | } | |
1201 | ||
1202 | return 255; | |
65efcfce LB |
1203 | } |
1204 | ||
1205 | /*------------------------------------------ | |
1206 | * rfapi_extract_l2o | |
1207 | * | |
d62a17ae | 1208 | * Find Layer 2 options in an option chain |
65efcfce | 1209 | * |
d62a17ae | 1210 | * input: |
65efcfce LB |
1211 | * pHop option chain |
1212 | * | |
1213 | * output: | |
1214 | * l2o layer 2 options extracted | |
1215 | * | |
1216 | * return value: | |
1217 | * 0 OK | |
1218 | * 1 no options found | |
1219 | * | |
1220 | --------------------------------------------*/ | |
d62a17ae | 1221 | int rfapi_extract_l2o( |
1222 | struct bgp_tea_options *pHop, /* chain of options */ | |
1223 | struct rfapi_l2address_option *l2o) /* return extracted value */ | |
65efcfce | 1224 | { |
d62a17ae | 1225 | struct bgp_tea_options *p; |
65efcfce | 1226 | |
d62a17ae | 1227 | for (p = pHop; p; p = p->next) { |
1228 | if ((p->type == RFAPI_VN_OPTION_TYPE_L2ADDR) | |
1229 | && (p->length >= 8)) { | |
65efcfce | 1230 | |
d62a17ae | 1231 | char *v = p->value; |
65efcfce | 1232 | |
d62a17ae | 1233 | memcpy(&l2o->macaddr, v, 6); |
65efcfce | 1234 | |
d62a17ae | 1235 | l2o->label = ((v[6] << 12) & 0xff000) |
1236 | + ((v[7] << 4) & 0xff0) | |
1237 | + ((v[8] >> 4) & 0xf); | |
65efcfce | 1238 | |
d62a17ae | 1239 | l2o->local_nve_id = (uint8_t)v[10]; |
65efcfce | 1240 | |
d62a17ae | 1241 | l2o->logical_net_id = |
1242 | (v[11] << 16) + (v[12] << 8) + (v[13] << 0); | |
65efcfce | 1243 | |
d62a17ae | 1244 | return 0; |
1245 | } | |
1246 | } | |
1247 | return 1; | |
65efcfce LB |
1248 | } |
1249 | ||
1250 | static struct rfapi_next_hop_entry * | |
d62a17ae | 1251 | rfapiRouteInfo2NextHopEntry(struct rfapi_ip_prefix *rprefix, |
40381db7 DS |
1252 | struct bgp_path_info *bpi, /* route to encode */ |
1253 | uint32_t lifetime, /* use this in nhe */ | |
1254 | struct agg_node *rn) /* req for L2 eth addr */ | |
65efcfce | 1255 | { |
d62a17ae | 1256 | struct rfapi_next_hop_entry *new; |
1257 | int have_vnc_tunnel_un = 0; | |
26a3ffd6 | 1258 | const struct prefix *p = agg_node_get_prefix(rn); |
65efcfce | 1259 | |
1e20238a | 1260 | #ifdef DEBUG_ENCAP_MONITOR |
40381db7 | 1261 | vnc_zlog_debug_verbose("%s: entry, bpi %p, rn %p", __func__, bpi, rn); |
65efcfce LB |
1262 | #endif |
1263 | ||
d62a17ae | 1264 | new = XCALLOC(MTYPE_RFAPI_NEXTHOP, sizeof(struct rfapi_next_hop_entry)); |
d62a17ae | 1265 | |
1266 | new->prefix = *rprefix; | |
1267 | ||
40381db7 DS |
1268 | if (bpi->extra |
1269 | && decode_rd_type(bpi->extra->vnc.import.rd.val) | |
d62a17ae | 1270 | == RD_TYPE_VNC_ETH) { |
1271 | /* ethernet */ | |
1272 | ||
1273 | struct rfapi_vn_option *vo; | |
1274 | ||
1275 | vo = XCALLOC(MTYPE_RFAPI_VN_OPTION, | |
1276 | sizeof(struct rfapi_vn_option)); | |
d62a17ae | 1277 | |
1278 | vo->type = RFAPI_VN_OPTION_TYPE_L2ADDR; | |
1279 | ||
26a3ffd6 | 1280 | memcpy(&vo->v.l2addr.macaddr, &p->u.prefix_eth.octet, ETH_ALEN); |
d62a17ae | 1281 | /* only low 3 bytes of this are significant */ |
b53e67a3 | 1282 | (void)rfapiEcommunityGetLNI(bgp_attr_get_ecommunity(bpi->attr), |
05864da7 | 1283 | &vo->v.l2addr.logical_net_id); |
b53e67a3 DA |
1284 | (void)rfapiEcommunityGetEthernetTag( |
1285 | bgp_attr_get_ecommunity(bpi->attr), | |
1286 | &vo->v.l2addr.tag_id); | |
d62a17ae | 1287 | |
1288 | /* local_nve_id comes from lower byte of RD type */ | |
40381db7 | 1289 | vo->v.l2addr.local_nve_id = bpi->extra->vnc.import.rd.val[1]; |
d62a17ae | 1290 | |
1291 | /* label comes from MP_REACH_NLRI label */ | |
40381db7 | 1292 | vo->v.l2addr.label = decode_label(&bpi->extra->label[0]); |
d62a17ae | 1293 | |
1294 | new->vn_options = vo; | |
1295 | ||
1296 | /* | |
1297 | * If there is an auxiliary prefix (i.e., host IP address), | |
1298 | * use it as the nexthop prefix instead of the query prefix | |
1299 | */ | |
40381db7 DS |
1300 | if (bpi->extra->vnc.import.aux_prefix.family) { |
1301 | rfapiQprefix2Rprefix(&bpi->extra->vnc.import.aux_prefix, | |
d62a17ae | 1302 | &new->prefix); |
1303 | } | |
1304 | } | |
1305 | ||
05864da7 DS |
1306 | bgp_encap_types tun_type = BGP_ENCAP_TYPE_MPLS; /*Default*/ |
1307 | new->prefix.cost = rfapiRfpCost(bpi->attr); | |
d62a17ae | 1308 | |
05864da7 | 1309 | struct bgp_attr_encap_subtlv *pEncap; |
d62a17ae | 1310 | |
05864da7 DS |
1311 | switch (BGP_MP_NEXTHOP_FAMILY(bpi->attr->mp_nexthop_len)) { |
1312 | case AF_INET: | |
1313 | new->vn_address.addr_family = AF_INET; | |
1314 | new->vn_address.addr.v4 = bpi->attr->mp_nexthop_global_in; | |
1315 | break; | |
d62a17ae | 1316 | |
05864da7 DS |
1317 | case AF_INET6: |
1318 | new->vn_address.addr_family = AF_INET6; | |
1319 | new->vn_address.addr.v6 = bpi->attr->mp_nexthop_global; | |
1320 | break; | |
d62a17ae | 1321 | |
05864da7 DS |
1322 | default: |
1323 | zlog_warn("%s: invalid vpn nexthop length: %d", __func__, | |
1324 | bpi->attr->mp_nexthop_len); | |
1325 | rfapi_free_next_hop_list(new); | |
1326 | return NULL; | |
1327 | } | |
d62a17ae | 1328 | |
91ebf12c DS |
1329 | for (pEncap = bgp_attr_get_vnc_subtlvs(bpi->attr); pEncap; |
1330 | pEncap = pEncap->next) { | |
05864da7 DS |
1331 | switch (pEncap->type) { |
1332 | case BGP_VNC_SUBTLV_TYPE_LIFETIME: | |
1333 | /* use configured lifetime, not attr lifetime */ | |
1334 | break; | |
d62a17ae | 1335 | |
05864da7 DS |
1336 | default: |
1337 | zlog_warn("%s: unknown VNC option type %d", __func__, | |
1338 | pEncap->type); | |
d62a17ae | 1339 | |
05864da7 | 1340 | break; |
d62a17ae | 1341 | } |
05864da7 | 1342 | } |
d62a17ae | 1343 | |
05864da7 DS |
1344 | bgp_attr_extcom_tunnel_type(bpi->attr, &tun_type); |
1345 | if (tun_type == BGP_ENCAP_TYPE_MPLS) { | |
1346 | struct prefix p; | |
1347 | /* MPLS carries UN address in next hop */ | |
1348 | rfapiNexthop2Prefix(bpi->attr, &p); | |
c7ca5ccf | 1349 | if (p.family != AF_UNSPEC) { |
05864da7 DS |
1350 | rfapiQprefix2Raddr(&p, &new->un_address); |
1351 | have_vnc_tunnel_un = 1; | |
d62a17ae | 1352 | } |
05864da7 | 1353 | } |
d62a17ae | 1354 | |
05864da7 DS |
1355 | for (pEncap = bpi->attr->encap_subtlvs; pEncap; pEncap = pEncap->next) { |
1356 | switch (pEncap->type) { | |
1357 | case BGP_ENCAP_SUBTLV_TYPE_REMOTE_ENDPOINT: | |
1358 | /* | |
1359 | * Overrides ENCAP UN address, if any | |
1360 | */ | |
1361 | switch (pEncap->length) { | |
d62a17ae | 1362 | |
05864da7 DS |
1363 | case 8: |
1364 | new->un_address.addr_family = AF_INET; | |
1365 | memcpy(&new->un_address.addr.v4, pEncap->value, | |
1366 | 4); | |
1367 | have_vnc_tunnel_un = 1; | |
1368 | break; | |
d62a17ae | 1369 | |
05864da7 DS |
1370 | case 20: |
1371 | new->un_address.addr_family = AF_INET6; | |
1372 | memcpy(&new->un_address.addr.v6, pEncap->value, | |
1373 | 16); | |
1374 | have_vnc_tunnel_un = 1; | |
d62a17ae | 1375 | break; |
1376 | ||
1377 | default: | |
1378 | zlog_warn( | |
05864da7 DS |
1379 | "%s: invalid tunnel subtlv UN addr length (%d) for bpi %p", |
1380 | __func__, pEncap->length, bpi); | |
d62a17ae | 1381 | } |
05864da7 DS |
1382 | break; |
1383 | ||
1384 | default: | |
1385 | zlog_warn("%s: unknown Encap Attribute option type %d", | |
1386 | __func__, pEncap->type); | |
1387 | break; | |
d62a17ae | 1388 | } |
05864da7 | 1389 | } |
d62a17ae | 1390 | |
05864da7 | 1391 | new->un_options = rfapi_encap_tlv_to_un_option(bpi->attr); |
65efcfce | 1392 | |
1e20238a | 1393 | #ifdef DEBUG_ENCAP_MONITOR |
05864da7 DS |
1394 | vnc_zlog_debug_verbose("%s: line %d: have_vnc_tunnel_un=%d", __func__, |
1395 | __LINE__, have_vnc_tunnel_un); | |
65efcfce LB |
1396 | #endif |
1397 | ||
05864da7 DS |
1398 | if (!have_vnc_tunnel_un && bpi->extra) { |
1399 | /* | |
1400 | * use cached UN address from ENCAP route | |
1401 | */ | |
1402 | new->un_address.addr_family = bpi->extra->vnc.import.un_family; | |
1403 | switch (new->un_address.addr_family) { | |
1404 | case AF_INET: | |
1405 | new->un_address.addr.v4 = | |
1406 | bpi->extra->vnc.import.un.addr4; | |
1407 | break; | |
1408 | case AF_INET6: | |
1409 | new->un_address.addr.v6 = | |
1410 | bpi->extra->vnc.import.un.addr6; | |
1411 | break; | |
1412 | default: | |
1413 | zlog_warn("%s: invalid UN addr family (%d) for bpi %p", | |
1414 | __func__, new->un_address.addr_family, bpi); | |
1415 | rfapi_free_next_hop_list(new); | |
1416 | return NULL; | |
d62a17ae | 1417 | } |
1418 | } | |
1419 | ||
1420 | new->lifetime = lifetime; | |
1421 | return new; | |
65efcfce LB |
1422 | } |
1423 | ||
fe08ba7e | 1424 | int rfapiHasNonRemovedRoutes(struct agg_node *rn) |
65efcfce | 1425 | { |
40381db7 | 1426 | struct bgp_path_info *bpi; |
65efcfce | 1427 | |
40381db7 | 1428 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 1429 | struct prefix pfx; |
65efcfce | 1430 | |
40381db7 DS |
1431 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
1432 | && (bpi->extra && !rfapiGetUnAddrOfVpnBi(bpi, &pfx))) { | |
65efcfce | 1433 | |
d62a17ae | 1434 | return 1; |
1435 | } | |
1436 | } | |
1437 | return 0; | |
65efcfce LB |
1438 | } |
1439 | ||
1e20238a | 1440 | #ifdef DEBUG_IT_NODES |
d62a17ae | 1441 | /* |
65efcfce LB |
1442 | * DEBUG FUNCTION |
1443 | */ | |
fe08ba7e | 1444 | void rfapiDumpNode(struct agg_node *rn) |
65efcfce | 1445 | { |
40381db7 | 1446 | struct bgp_path_info *bpi; |
d62a17ae | 1447 | |
1448 | vnc_zlog_debug_verbose("%s: rn=%p", __func__, rn); | |
40381db7 | 1449 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 1450 | struct prefix pfx; |
40381db7 | 1451 | int ctrc = rfapiGetUnAddrOfVpnBi(bpi, &pfx); |
d62a17ae | 1452 | int nr; |
1453 | ||
40381db7 DS |
1454 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
1455 | && (bpi->extra && !ctrc)) { | |
d62a17ae | 1456 | |
1457 | nr = 1; | |
1458 | } else { | |
1459 | nr = 0; | |
1460 | } | |
1461 | ||
1462 | vnc_zlog_debug_verbose( | |
40381db7 DS |
1463 | " bpi=%p, nr=%d, flags=0x%x, extra=%p, ctrc=%d", bpi, |
1464 | nr, bpi->flags, bpi->extra, ctrc); | |
d62a17ae | 1465 | } |
65efcfce LB |
1466 | } |
1467 | #endif | |
1468 | ||
d62a17ae | 1469 | static int rfapiNhlAddNodeRoutes( |
fe08ba7e | 1470 | struct agg_node *rn, /* in */ |
d62a17ae | 1471 | struct rfapi_ip_prefix *rprefix, /* in */ |
1472 | uint32_t lifetime, /* in */ | |
1473 | int removed, /* in */ | |
1474 | struct rfapi_next_hop_entry **head, /* in/out */ | |
1475 | struct rfapi_next_hop_entry **tail, /* in/out */ | |
1476 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
fe08ba7e | 1477 | struct agg_node *rfd_rib_node, /* preload this NVE rib node */ |
d62a17ae | 1478 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1479 | { |
40381db7 | 1480 | struct bgp_path_info *bpi; |
d62a17ae | 1481 | struct rfapi_next_hop_entry *new; |
1482 | struct prefix pfx_un; | |
1483 | struct skiplist *seen_nexthops; | |
1484 | int count = 0; | |
26a3ffd6 DS |
1485 | const struct prefix *p = agg_node_get_prefix(rn); |
1486 | int is_l2 = (p->family == AF_ETHERNET); | |
d62a17ae | 1487 | |
fe08ba7e DS |
1488 | if (rfd_rib_node) { |
1489 | struct agg_table *atable = agg_get_table(rfd_rib_node); | |
84cc1207 PZ |
1490 | struct rfapi_descriptor *rfd; |
1491 | ||
fe08ba7e DS |
1492 | if (atable) { |
1493 | rfd = agg_get_table_info(atable); | |
84cc1207 | 1494 | |
fe08ba7e DS |
1495 | if (rfapiRibFTDFilterRecentPrefix(rfd, rn, |
1496 | pfx_target_original)) | |
1497 | return 0; | |
1498 | } | |
d62a17ae | 1499 | } |
1500 | ||
1501 | seen_nexthops = | |
63265b5c | 1502 | skiplist_new(0, vnc_prefix_cmp, prefix_free_lists); |
d62a17ae | 1503 | |
40381db7 | 1504 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 1505 | |
1506 | struct prefix pfx_vn; | |
1507 | struct prefix *newpfx; | |
1508 | ||
40381db7 | 1509 | if (removed && !CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
1e20238a | 1510 | #ifdef DEBUG_RETURNED_NHL |
d62a17ae | 1511 | vnc_zlog_debug_verbose( |
1512 | "%s: want holddown, this route not holddown, skip", | |
1513 | __func__); | |
65efcfce | 1514 | #endif |
d62a17ae | 1515 | continue; |
1516 | } | |
40381db7 | 1517 | if (!removed && CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
d62a17ae | 1518 | continue; |
1519 | } | |
1520 | ||
40381db7 | 1521 | if (!bpi->extra) { |
d62a17ae | 1522 | continue; |
1523 | } | |
1524 | ||
1525 | /* | |
1526 | * Check for excluded VN address | |
1527 | */ | |
40381db7 | 1528 | if (rfapiVpnBiNhEqualsPt(bpi, exclude_vnaddr)) |
d62a17ae | 1529 | continue; |
1530 | ||
1531 | /* | |
1532 | * Check for VN address (nexthop) copied already | |
1533 | */ | |
1534 | if (is_l2) { | |
1535 | /* L2 routes: semantic nexthop in aux_prefix; VN addr | |
1536 | * ain't it */ | |
40381db7 | 1537 | pfx_vn = bpi->extra->vnc.import.aux_prefix; |
d62a17ae | 1538 | } else { |
40381db7 | 1539 | rfapiNexthop2Prefix(bpi->attr, &pfx_vn); |
d62a17ae | 1540 | } |
1541 | if (!skiplist_search(seen_nexthops, &pfx_vn, NULL)) { | |
1e20238a | 1542 | #ifdef DEBUG_RETURNED_NHL |
d62a17ae | 1543 | vnc_zlog_debug_verbose( |
2dbe669b DA |
1544 | "%s: already put VN/nexthop %pFX, skip", |
1545 | __func__, &pfx_vn); | |
65efcfce | 1546 | #endif |
d62a17ae | 1547 | continue; |
1548 | } | |
65efcfce | 1549 | |
40381db7 | 1550 | if (rfapiGetUnAddrOfVpnBi(bpi, &pfx_un)) { |
1e20238a | 1551 | #ifdef DEBUG_ENCAP_MONITOR |
d62a17ae | 1552 | vnc_zlog_debug_verbose( |
40381db7 | 1553 | "%s: failed to get UN address of this VPN bpi", |
d62a17ae | 1554 | __func__); |
65efcfce | 1555 | #endif |
d62a17ae | 1556 | continue; |
1557 | } | |
1558 | ||
1559 | newpfx = prefix_new(); | |
1560 | *newpfx = pfx_vn; | |
1561 | skiplist_insert(seen_nexthops, newpfx, newpfx); | |
1562 | ||
40381db7 | 1563 | new = rfapiRouteInfo2NextHopEntry(rprefix, bpi, lifetime, rn); |
d62a17ae | 1564 | if (new) { |
1565 | if (rfapiRibPreloadBi(rfd_rib_node, &pfx_vn, &pfx_un, | |
40381db7 | 1566 | lifetime, bpi)) { |
d62a17ae | 1567 | /* duplicate filtered by RIB */ |
1568 | rfapi_free_next_hop_list(new); | |
1569 | new = NULL; | |
1570 | } | |
1571 | } | |
1572 | ||
1573 | if (new) { | |
1574 | if (*tail) { | |
1575 | (*tail)->next = new; | |
1576 | } else { | |
1577 | *head = new; | |
1578 | } | |
1579 | *tail = new; | |
1580 | ++count; | |
1581 | } | |
1582 | } | |
1583 | ||
1584 | skiplist_free(seen_nexthops); | |
1585 | ||
1586 | return count; | |
65efcfce LB |
1587 | } |
1588 | ||
1589 | ||
1590 | /* | |
1591 | * Breadth-first | |
1592 | * | |
1593 | * omit_node is meant for the situation where we are adding a subtree | |
1594 | * of a parent of some original requested node. The response already | |
1595 | * contains the original requested node, and we don't want to duplicate | |
1596 | * its routes in the list, so we skip it if the right or left node | |
1597 | * matches (of course, we still travel down its child subtrees). | |
1598 | */ | |
d62a17ae | 1599 | static int rfapiNhlAddSubtree( |
fe08ba7e | 1600 | struct agg_node *rn, /* in */ |
d62a17ae | 1601 | uint32_t lifetime, /* in */ |
1602 | struct rfapi_next_hop_entry **head, /* in/out */ | |
1603 | struct rfapi_next_hop_entry **tail, /* in/out */ | |
fe08ba7e | 1604 | struct agg_node *omit_node, /* in */ |
d62a17ae | 1605 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ |
fe08ba7e | 1606 | struct agg_table *rfd_rib_table, /* preload here */ |
d62a17ae | 1607 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1608 | { |
d62a17ae | 1609 | struct rfapi_ip_prefix rprefix; |
1610 | int rcount = 0; | |
1611 | ||
1612 | /* FIXME: need to find a better way here to work without sticking our | |
1613 | * hands in node->link */ | |
fe08ba7e DS |
1614 | if (agg_node_left(rn) && agg_node_left(rn) != omit_node) { |
1615 | if (agg_node_left(rn)->info) { | |
26a3ffd6 DS |
1616 | const struct prefix *p = |
1617 | agg_node_get_prefix(agg_node_left(rn)); | |
d62a17ae | 1618 | int count = 0; |
fe08ba7e | 1619 | struct agg_node *rib_rn = NULL; |
d62a17ae | 1620 | |
26a3ffd6 DS |
1621 | rfapiQprefix2Rprefix(p, &rprefix); |
1622 | if (rfd_rib_table) | |
1623 | rib_rn = agg_node_get(rfd_rib_table, p); | |
d62a17ae | 1624 | |
1625 | count = rfapiNhlAddNodeRoutes( | |
fe08ba7e DS |
1626 | agg_node_left(rn), &rprefix, lifetime, 0, head, |
1627 | tail, exclude_vnaddr, rib_rn, | |
1628 | pfx_target_original); | |
d62a17ae | 1629 | if (!count) { |
1630 | count = rfapiNhlAddNodeRoutes( | |
fe08ba7e DS |
1631 | agg_node_left(rn), &rprefix, lifetime, |
1632 | 1, head, tail, exclude_vnaddr, rib_rn, | |
d62a17ae | 1633 | pfx_target_original); |
1634 | } | |
1635 | rcount += count; | |
1636 | if (rib_rn) | |
fe08ba7e | 1637 | agg_unlock_node(rib_rn); |
d62a17ae | 1638 | } |
1639 | } | |
1640 | ||
fe08ba7e DS |
1641 | if (agg_node_right(rn) && agg_node_right(rn) != omit_node) { |
1642 | if (agg_node_right(rn)->info) { | |
26a3ffd6 DS |
1643 | const struct prefix *p = |
1644 | agg_node_get_prefix(agg_node_right(rn)); | |
d62a17ae | 1645 | int count = 0; |
fe08ba7e | 1646 | struct agg_node *rib_rn = NULL; |
d62a17ae | 1647 | |
26a3ffd6 DS |
1648 | rfapiQprefix2Rprefix(p, &rprefix); |
1649 | if (rfd_rib_table) | |
1650 | rib_rn = agg_node_get(rfd_rib_table, p); | |
1651 | ||
d62a17ae | 1652 | count = rfapiNhlAddNodeRoutes( |
fe08ba7e DS |
1653 | agg_node_right(rn), &rprefix, lifetime, 0, head, |
1654 | tail, exclude_vnaddr, rib_rn, | |
1655 | pfx_target_original); | |
d62a17ae | 1656 | if (!count) { |
1657 | count = rfapiNhlAddNodeRoutes( | |
fe08ba7e DS |
1658 | agg_node_right(rn), &rprefix, lifetime, |
1659 | 1, head, tail, exclude_vnaddr, rib_rn, | |
d62a17ae | 1660 | pfx_target_original); |
1661 | } | |
1662 | rcount += count; | |
1663 | if (rib_rn) | |
fe08ba7e | 1664 | agg_unlock_node(rib_rn); |
d62a17ae | 1665 | } |
1666 | } | |
1667 | ||
fe08ba7e | 1668 | if (agg_node_left(rn)) { |
d62a17ae | 1669 | rcount += rfapiNhlAddSubtree( |
fe08ba7e | 1670 | agg_node_left(rn), lifetime, head, tail, omit_node, |
d62a17ae | 1671 | exclude_vnaddr, rfd_rib_table, pfx_target_original); |
1672 | } | |
fe08ba7e | 1673 | if (agg_node_right(rn)) { |
d62a17ae | 1674 | rcount += rfapiNhlAddSubtree( |
fe08ba7e | 1675 | agg_node_right(rn), lifetime, head, tail, omit_node, |
d62a17ae | 1676 | exclude_vnaddr, rfd_rib_table, pfx_target_original); |
1677 | } | |
1678 | ||
1679 | return rcount; | |
65efcfce LB |
1680 | } |
1681 | ||
1682 | /* | |
1683 | * Implementation of ROUTE_LIST(node) from RFAPI-Import-Event-Handling.txt | |
1684 | * | |
1685 | * Construct an rfapi nexthop list based on the routes attached to | |
1686 | * the specified node. | |
1687 | * | |
1defdda8 DS |
1688 | * If there are any routes that do NOT have BGP_PATH_REMOVED set, |
1689 | * return those only. If there are ONLY routes with BGP_PATH_REMOVED, | |
65efcfce LB |
1690 | * then return those, and also include all the non-removed routes from the |
1691 | * next less-specific node (i.e., this node's parent) at the end. | |
1692 | */ | |
d62a17ae | 1693 | struct rfapi_next_hop_entry *rfapiRouteNode2NextHopList( |
fe08ba7e DS |
1694 | struct agg_node *rn, uint32_t lifetime, /* put into nexthop entries */ |
1695 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
1696 | struct agg_table *rfd_rib_table, /* preload here */ | |
1697 | struct prefix *pfx_target_original) /* query target */ | |
65efcfce | 1698 | { |
d62a17ae | 1699 | struct rfapi_ip_prefix rprefix; |
1700 | struct rfapi_next_hop_entry *answer = NULL; | |
1701 | struct rfapi_next_hop_entry *last = NULL; | |
fe08ba7e | 1702 | struct agg_node *parent; |
26a3ffd6 | 1703 | const struct prefix *p = agg_node_get_prefix(rn); |
d62a17ae | 1704 | int count = 0; |
fe08ba7e | 1705 | struct agg_node *rib_rn; |
65efcfce | 1706 | |
1e20238a | 1707 | #ifdef DEBUG_RETURNED_NHL |
26a3ffd6 | 1708 | vnc_zlog_debug_verbose("%s: called with node pfx=%rRN", __func__, rn); |
d62a17ae | 1709 | rfapiDebugBacktrace(); |
65efcfce LB |
1710 | #endif |
1711 | ||
26a3ffd6 | 1712 | rfapiQprefix2Rprefix(p, &rprefix); |
d62a17ae | 1713 | |
26a3ffd6 | 1714 | rib_rn = rfd_rib_table ? agg_node_get(rfd_rib_table, p) : NULL; |
d62a17ae | 1715 | |
1716 | /* | |
1717 | * Add non-withdrawn routes at this node | |
1718 | */ | |
1719 | count = rfapiNhlAddNodeRoutes(rn, &rprefix, lifetime, 0, &answer, &last, | |
1720 | exclude_vnaddr, rib_rn, | |
1721 | pfx_target_original); | |
1722 | ||
1723 | /* | |
1724 | * If the list has at least one entry, it's finished | |
1725 | */ | |
1726 | if (count) { | |
1727 | count += rfapiNhlAddSubtree(rn, lifetime, &answer, &last, NULL, | |
1728 | exclude_vnaddr, rfd_rib_table, | |
1729 | pfx_target_original); | |
1730 | vnc_zlog_debug_verbose("%s: %d nexthops, answer=%p", __func__, | |
1731 | count, answer); | |
1e20238a | 1732 | #ifdef DEBUG_RETURNED_NHL |
d62a17ae | 1733 | rfapiPrintNhl(NULL, answer); |
65efcfce | 1734 | #endif |
d62a17ae | 1735 | if (rib_rn) |
fe08ba7e | 1736 | agg_unlock_node(rib_rn); |
d62a17ae | 1737 | return answer; |
1738 | } | |
1739 | ||
1740 | /* | |
1741 | * Add withdrawn routes at this node | |
1742 | */ | |
1743 | count = rfapiNhlAddNodeRoutes(rn, &rprefix, lifetime, 1, &answer, &last, | |
1744 | exclude_vnaddr, rib_rn, | |
1745 | pfx_target_original); | |
1746 | if (rib_rn) | |
fe08ba7e | 1747 | agg_unlock_node(rib_rn); |
d62a17ae | 1748 | |
1749 | // rfapiPrintNhl(NULL, answer); | |
1750 | ||
1751 | /* | |
1752 | * walk up the tree until we find a node with non-deleted | |
1753 | * routes, then add them | |
1754 | */ | |
fe08ba7e DS |
1755 | for (parent = agg_node_parent(rn); parent; |
1756 | parent = agg_node_parent(parent)) { | |
d62a17ae | 1757 | if (rfapiHasNonRemovedRoutes(parent)) { |
1758 | break; | |
1759 | } | |
1760 | } | |
1761 | ||
1762 | /* | |
1763 | * Add non-withdrawn routes from less-specific prefix | |
1764 | */ | |
1765 | if (parent) { | |
26a3ffd6 DS |
1766 | const struct prefix *p = agg_node_get_prefix(parent); |
1767 | ||
1768 | rib_rn = rfd_rib_table ? agg_node_get(rfd_rib_table, p) : NULL; | |
1769 | rfapiQprefix2Rprefix(p, &rprefix); | |
d62a17ae | 1770 | count += rfapiNhlAddNodeRoutes(parent, &rprefix, lifetime, 0, |
1771 | &answer, &last, exclude_vnaddr, | |
1772 | rib_rn, pfx_target_original); | |
1773 | count += rfapiNhlAddSubtree(parent, lifetime, &answer, &last, | |
1774 | rn, exclude_vnaddr, rfd_rib_table, | |
1775 | pfx_target_original); | |
1776 | if (rib_rn) | |
fe08ba7e | 1777 | agg_unlock_node(rib_rn); |
d62a17ae | 1778 | } else { |
1779 | /* | |
1780 | * There is no parent with non-removed routes. Still need to | |
1781 | * add subtree of original node if it contributed routes to the | |
1782 | * answer. | |
1783 | */ | |
1784 | if (count) | |
1785 | count += rfapiNhlAddSubtree(rn, lifetime, &answer, | |
1786 | &last, rn, exclude_vnaddr, | |
1787 | rfd_rib_table, | |
1788 | pfx_target_original); | |
1789 | } | |
1790 | ||
1791 | vnc_zlog_debug_verbose("%s: %d nexthops, answer=%p", __func__, count, | |
1792 | answer); | |
1e20238a | 1793 | #ifdef DEBUG_RETURNED_NHL |
d62a17ae | 1794 | rfapiPrintNhl(NULL, answer); |
65efcfce | 1795 | #endif |
d62a17ae | 1796 | return answer; |
65efcfce LB |
1797 | } |
1798 | ||
1799 | /* | |
1800 | * Construct nexthop list of all routes in table | |
1801 | */ | |
d62a17ae | 1802 | struct rfapi_next_hop_entry *rfapiRouteTable2NextHopList( |
fe08ba7e DS |
1803 | struct agg_table *rt, uint32_t lifetime, /* put into nexthop entries */ |
1804 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
1805 | struct agg_table *rfd_rib_table, /* preload this NVE rib table */ | |
1806 | struct prefix *pfx_target_original) /* query target */ | |
65efcfce | 1807 | { |
fe08ba7e | 1808 | struct agg_node *rn; |
d62a17ae | 1809 | struct rfapi_next_hop_entry *biglist = NULL; |
1810 | struct rfapi_next_hop_entry *nhl; | |
1811 | struct rfapi_next_hop_entry *tail = NULL; | |
1812 | int count = 0; | |
1813 | ||
fe08ba7e | 1814 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
d62a17ae | 1815 | |
1816 | nhl = rfapiRouteNode2NextHopList(rn, lifetime, exclude_vnaddr, | |
1817 | rfd_rib_table, | |
1818 | pfx_target_original); | |
1819 | if (!tail) { | |
1820 | tail = biglist = nhl; | |
1821 | if (tail) | |
1822 | count = 1; | |
1823 | } else { | |
1824 | tail->next = nhl; | |
1825 | } | |
1826 | if (tail) { | |
1827 | while (tail->next) { | |
1828 | ++count; | |
1829 | tail = tail->next; | |
1830 | } | |
1831 | } | |
1832 | } | |
1833 | ||
1834 | vnc_zlog_debug_verbose("%s: returning %d routes", __func__, count); | |
1835 | return biglist; | |
65efcfce LB |
1836 | } |
1837 | ||
d62a17ae | 1838 | struct rfapi_next_hop_entry *rfapiEthRouteNode2NextHopList( |
fe08ba7e | 1839 | struct agg_node *rn, struct rfapi_ip_prefix *rprefix, |
d62a17ae | 1840 | uint32_t lifetime, /* put into nexthop entries */ |
1841 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
fe08ba7e | 1842 | struct agg_table *rfd_rib_table, /* preload NVE rib table */ |
d62a17ae | 1843 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1844 | { |
d62a17ae | 1845 | int count = 0; |
1846 | struct rfapi_next_hop_entry *answer = NULL; | |
1847 | struct rfapi_next_hop_entry *last = NULL; | |
fe08ba7e | 1848 | struct agg_node *rib_rn; |
65efcfce | 1849 | |
26a3ffd6 DS |
1850 | rib_rn = rfd_rib_table |
1851 | ? agg_node_get(rfd_rib_table, agg_node_get_prefix(rn)) | |
1852 | : NULL; | |
65efcfce | 1853 | |
d62a17ae | 1854 | count = rfapiNhlAddNodeRoutes(rn, rprefix, lifetime, 0, &answer, &last, |
1855 | NULL, rib_rn, pfx_target_original); | |
65efcfce | 1856 | |
1e20238a | 1857 | #ifdef DEBUG_ENCAP_MONITOR |
d62a17ae | 1858 | vnc_zlog_debug_verbose("%s: node %p: %d non-holddown routes", __func__, |
1859 | rn, count); | |
65efcfce LB |
1860 | #endif |
1861 | ||
d62a17ae | 1862 | if (!count) { |
1863 | count = rfapiNhlAddNodeRoutes(rn, rprefix, lifetime, 1, &answer, | |
1864 | &last, exclude_vnaddr, rib_rn, | |
1865 | pfx_target_original); | |
1866 | vnc_zlog_debug_verbose("%s: node %p: %d holddown routes", | |
1867 | __func__, rn, count); | |
1868 | } | |
65efcfce | 1869 | |
d62a17ae | 1870 | if (rib_rn) |
fe08ba7e | 1871 | agg_unlock_node(rib_rn); |
65efcfce | 1872 | |
1e20238a | 1873 | #ifdef DEBUG_RETURNED_NHL |
d62a17ae | 1874 | rfapiPrintNhl(NULL, answer); |
65efcfce LB |
1875 | #endif |
1876 | ||
d62a17ae | 1877 | return answer; |
65efcfce LB |
1878 | } |
1879 | ||
1880 | ||
1881 | /* | |
1882 | * Construct nexthop list of all routes in table | |
1883 | */ | |
d62a17ae | 1884 | struct rfapi_next_hop_entry *rfapiEthRouteTable2NextHopList( |
1885 | uint32_t logical_net_id, struct rfapi_ip_prefix *rprefix, | |
1886 | uint32_t lifetime, /* put into nexthop entries */ | |
1887 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
fe08ba7e | 1888 | struct agg_table *rfd_rib_table, /* preload NVE rib node */ |
d62a17ae | 1889 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1890 | { |
d62a17ae | 1891 | struct rfapi_import_table *it; |
1892 | struct bgp *bgp = bgp_get_default(); | |
fe08ba7e DS |
1893 | struct agg_table *rt; |
1894 | struct agg_node *rn; | |
d62a17ae | 1895 | struct rfapi_next_hop_entry *biglist = NULL; |
1896 | struct rfapi_next_hop_entry *nhl; | |
1897 | struct rfapi_next_hop_entry *tail = NULL; | |
1898 | int count = 0; | |
1899 | ||
1900 | ||
1901 | it = rfapiMacImportTableGet(bgp, logical_net_id); | |
1902 | rt = it->imported_vpn[AFI_L2VPN]; | |
1903 | ||
fe08ba7e | 1904 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
d62a17ae | 1905 | |
1906 | nhl = rfapiEthRouteNode2NextHopList( | |
1907 | rn, rprefix, lifetime, exclude_vnaddr, rfd_rib_table, | |
1908 | pfx_target_original); | |
1909 | if (!tail) { | |
1910 | tail = biglist = nhl; | |
1911 | if (tail) | |
1912 | count = 1; | |
1913 | } else { | |
1914 | tail->next = nhl; | |
1915 | } | |
1916 | if (tail) { | |
1917 | while (tail->next) { | |
1918 | ++count; | |
1919 | tail = tail->next; | |
1920 | } | |
1921 | } | |
1922 | } | |
1923 | ||
1924 | vnc_zlog_debug_verbose("%s: returning %d routes", __func__, count); | |
1925 | return biglist; | |
65efcfce LB |
1926 | } |
1927 | ||
1928 | /* | |
40381db7 DS |
1929 | * Insert a new bpi to the imported route table node, |
1930 | * keeping the list of BPIs sorted best route first | |
65efcfce | 1931 | */ |
fe08ba7e | 1932 | static void rfapiBgpInfoAttachSorted(struct agg_node *rn, |
4b7e6066 | 1933 | struct bgp_path_info *info_new, afi_t afi, |
d62a17ae | 1934 | safi_t safi) |
65efcfce | 1935 | { |
d62a17ae | 1936 | struct bgp *bgp; |
4b7e6066 DS |
1937 | struct bgp_path_info *prev; |
1938 | struct bgp_path_info *next; | |
d62a17ae | 1939 | char pfx_buf[PREFIX2STR_BUFFER]; |
1940 | ||
1941 | ||
1942 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
1943 | ||
1944 | if (VNC_DEBUG(IMPORT_BI_ATTACH)) { | |
1945 | vnc_zlog_debug_verbose("%s: info_new->peer=%p", __func__, | |
1946 | info_new->peer); | |
1947 | vnc_zlog_debug_verbose("%s: info_new->peer->su_remote=%p", | |
1948 | __func__, info_new->peer->su_remote); | |
1949 | } | |
1950 | ||
1951 | for (prev = NULL, next = rn->info; next; | |
1952 | prev = next, next = next->next) { | |
fdf81fa0 DS |
1953 | enum bgp_path_selection_reason reason; |
1954 | ||
1defdda8 DS |
1955 | if (!bgp |
1956 | || (!CHECK_FLAG(info_new->flags, BGP_PATH_REMOVED) | |
1957 | && CHECK_FLAG(next->flags, BGP_PATH_REMOVED)) | |
18ee8310 | 1958 | || bgp_path_info_cmp_compatible(bgp, info_new, next, |
fdf81fa0 DS |
1959 | pfx_buf, afi, safi, |
1960 | &reason) | |
d62a17ae | 1961 | == -1) { /* -1 if 1st is better */ |
1962 | break; | |
1963 | } | |
1964 | } | |
1965 | vnc_zlog_debug_verbose("%s: prev=%p, next=%p", __func__, prev, next); | |
1966 | if (prev) { | |
1967 | prev->next = info_new; | |
1968 | } else { | |
1969 | rn->info = info_new; | |
1970 | } | |
1971 | info_new->prev = prev; | |
1972 | info_new->next = next; | |
1973 | if (next) | |
1974 | next->prev = info_new; | |
1975 | bgp_attr_intern(info_new->attr); | |
65efcfce LB |
1976 | } |
1977 | ||
40381db7 | 1978 | static void rfapiBgpInfoDetach(struct agg_node *rn, struct bgp_path_info *bpi) |
65efcfce | 1979 | { |
d62a17ae | 1980 | /* |
1981 | * Remove the route (doubly-linked) | |
1982 | */ | |
40381db7 DS |
1983 | // bgp_attr_unintern (&bpi->attr); |
1984 | if (bpi->next) | |
1985 | bpi->next->prev = bpi->prev; | |
1986 | if (bpi->prev) | |
1987 | bpi->prev->next = bpi->next; | |
d62a17ae | 1988 | else |
40381db7 | 1989 | rn->info = bpi->next; |
65efcfce LB |
1990 | } |
1991 | ||
1992 | /* | |
1993 | * For L3-indexed import tables | |
1994 | */ | |
1a4189d4 | 1995 | static int rfapi_bi_peer_rd_cmp(const void *b1, const void *b2) |
65efcfce | 1996 | { |
1a4189d4 DS |
1997 | const struct bgp_path_info *bpi1 = b1; |
1998 | const struct bgp_path_info *bpi2 = b2; | |
d62a17ae | 1999 | |
2000 | /* | |
2001 | * Compare peers | |
2002 | */ | |
40381db7 | 2003 | if (bpi1->peer < bpi2->peer) |
d62a17ae | 2004 | return -1; |
40381db7 | 2005 | if (bpi1->peer > bpi2->peer) |
d62a17ae | 2006 | return 1; |
2007 | ||
2008 | /* | |
2009 | * compare RDs | |
2010 | */ | |
1a4189d4 DS |
2011 | return vnc_prefix_cmp( |
2012 | (const struct prefix *)&bpi1->extra->vnc.import.rd, | |
2013 | (const struct prefix *)&bpi2->extra->vnc.import.rd); | |
65efcfce LB |
2014 | } |
2015 | ||
2016 | /* | |
2017 | * For L2-indexed import tables | |
40381db7 | 2018 | * The BPIs in these tables should ALWAYS have an aux_prefix set because |
65efcfce LB |
2019 | * they arrive via IPv4 or IPv6 advertisements. |
2020 | */ | |
1a4189d4 | 2021 | static int rfapi_bi_peer_rd_aux_cmp(const void *b1, const void *b2) |
65efcfce | 2022 | { |
1a4189d4 DS |
2023 | const struct bgp_path_info *bpi1 = b1; |
2024 | const struct bgp_path_info *bpi2 = b2; | |
d62a17ae | 2025 | int rc; |
2026 | ||
2027 | /* | |
2028 | * Compare peers | |
2029 | */ | |
40381db7 | 2030 | if (bpi1->peer < bpi2->peer) |
d62a17ae | 2031 | return -1; |
40381db7 | 2032 | if (bpi1->peer > bpi2->peer) |
d62a17ae | 2033 | return 1; |
2034 | ||
2035 | /* | |
2036 | * compare RDs | |
2037 | */ | |
40381db7 DS |
2038 | rc = vnc_prefix_cmp((struct prefix *)&bpi1->extra->vnc.import.rd, |
2039 | (struct prefix *)&bpi2->extra->vnc.import.rd); | |
d62a17ae | 2040 | if (rc) { |
2041 | return rc; | |
2042 | } | |
2043 | ||
2044 | /* | |
2045 | * L2 import tables can have multiple entries with the | |
2046 | * same MAC address, same RD, but different L3 addresses. | |
2047 | * | |
2048 | * Use presence of aux_prefix with AF=ethernet and prefixlen=1 | |
2049 | * as magic value to signify explicit wildcarding of the aux_prefix. | |
40381db7 DS |
2050 | * This magic value will not appear in bona fide bpi entries in |
2051 | * the import table, but is allowed in the "fake" bpi used to | |
d62a17ae | 2052 | * probe the table when searching. (We have to test both b1 and b2 |
2053 | * because there is no guarantee of the order the test key and | |
2054 | * the real key will be passed) | |
2055 | */ | |
40381db7 DS |
2056 | if ((bpi1->extra->vnc.import.aux_prefix.family == AF_ETHERNET |
2057 | && (bpi1->extra->vnc.import.aux_prefix.prefixlen == 1)) | |
2058 | || (bpi2->extra->vnc.import.aux_prefix.family == AF_ETHERNET | |
2059 | && (bpi2->extra->vnc.import.aux_prefix.prefixlen == 1))) { | |
d62a17ae | 2060 | |
2061 | /* | |
2062 | * wildcard aux address specified | |
2063 | */ | |
2064 | return 0; | |
2065 | } | |
2066 | ||
40381db7 DS |
2067 | return vnc_prefix_cmp(&bpi1->extra->vnc.import.aux_prefix, |
2068 | &bpi2->extra->vnc.import.aux_prefix); | |
65efcfce LB |
2069 | } |
2070 | ||
2071 | ||
2072 | /* | |
2073 | * Index on RD and Peer | |
2074 | */ | |
fe08ba7e | 2075 | static void rfapiItBiIndexAdd(struct agg_node *rn, /* Import table VPN node */ |
40381db7 | 2076 | struct bgp_path_info *bpi) /* new BPI */ |
65efcfce | 2077 | { |
d62a17ae | 2078 | struct skiplist *sl; |
26a3ffd6 | 2079 | const struct prefix *p; |
d62a17ae | 2080 | |
2081 | assert(rn); | |
40381db7 DS |
2082 | assert(bpi); |
2083 | assert(bpi->extra); | |
d62a17ae | 2084 | |
4a8cd6ad | 2085 | vnc_zlog_debug_verbose("%s: bpi %p, peer %p, rd %pRDP", __func__, bpi, |
c4f64ea9 | 2086 | bpi->peer, &bpi->extra->vnc.import.rd); |
d62a17ae | 2087 | |
2088 | sl = RFAPI_RDINDEX_W_ALLOC(rn); | |
2089 | if (!sl) { | |
26a3ffd6 DS |
2090 | p = agg_node_get_prefix(rn); |
2091 | if (AF_ETHERNET == p->family) { | |
d62a17ae | 2092 | sl = skiplist_new(0, rfapi_bi_peer_rd_aux_cmp, NULL); |
2093 | } else { | |
2094 | sl = skiplist_new(0, rfapi_bi_peer_rd_cmp, NULL); | |
2095 | } | |
2096 | RFAPI_IT_EXTRA_GET(rn)->u.vpn.idx_rd = sl; | |
fe08ba7e | 2097 | agg_lock_node(rn); /* for skiplist */ |
d62a17ae | 2098 | } |
40381db7 | 2099 | assert(!skiplist_insert(sl, (void *)bpi, (void *)bpi)); |
fe08ba7e | 2100 | agg_lock_node(rn); /* for skiplist entry */ |
d62a17ae | 2101 | |
40381db7 | 2102 | /* NB: BPIs in import tables are not refcounted */ |
65efcfce LB |
2103 | } |
2104 | ||
fe08ba7e | 2105 | static void rfapiItBiIndexDump(struct agg_node *rn) |
65efcfce | 2106 | { |
d62a17ae | 2107 | struct skiplist *sl; |
2108 | void *cursor = NULL; | |
4b7e6066 DS |
2109 | struct bgp_path_info *k; |
2110 | struct bgp_path_info *v; | |
d62a17ae | 2111 | int rc; |
2112 | ||
2113 | sl = RFAPI_RDINDEX(rn); | |
2114 | if (!sl) | |
2115 | return; | |
2116 | ||
2117 | for (rc = skiplist_next(sl, (void **)&k, (void **)&v, &cursor); !rc; | |
2118 | rc = skiplist_next(sl, (void **)&k, (void **)&v, &cursor)) { | |
2119 | ||
06b9f471 | 2120 | char buf[RD_ADDRSTRLEN]; |
872ed4c7 | 2121 | char buf_aux_pfx[PREFIX_STRLEN]; |
d62a17ae | 2122 | |
4a8cd6ad PG |
2123 | prefix_rd2str( |
2124 | &k->extra->vnc.import.rd, buf, sizeof(buf), | |
2125 | bgp_get_asnotation(k->peer ? k->peer->bgp : NULL)); | |
d62a17ae | 2126 | if (k->extra->vnc.import.aux_prefix.family) { |
2127 | prefix2str(&k->extra->vnc.import.aux_prefix, | |
06b9f471 DS |
2128 | buf_aux_pfx, sizeof(buf_aux_pfx)); |
2129 | } else | |
9825c71e | 2130 | strlcpy(buf_aux_pfx, "(none)", sizeof(buf_aux_pfx)); |
d62a17ae | 2131 | |
40381db7 | 2132 | vnc_zlog_debug_verbose("bpi %p, peer %p, rd %s, aux_prefix %s", |
d62a17ae | 2133 | k, k->peer, buf, buf_aux_pfx); |
2134 | } | |
65efcfce LB |
2135 | } |
2136 | ||
4b7e6066 | 2137 | static struct bgp_path_info *rfapiItBiIndexSearch( |
fe08ba7e | 2138 | struct agg_node *rn, /* Import table VPN node */ |
d62a17ae | 2139 | struct prefix_rd *prd, struct peer *peer, |
5a1ae2c2 | 2140 | const struct prefix *aux_prefix) /* optional L3 addr for L2 ITs */ |
65efcfce | 2141 | { |
d62a17ae | 2142 | struct skiplist *sl; |
2143 | int rc; | |
b8694ef4 DS |
2144 | struct bgp_path_info bpi_fake = {0}; |
2145 | struct bgp_path_info_extra bpi_extra = {0}; | |
40381db7 | 2146 | struct bgp_path_info *bpi_result; |
65efcfce | 2147 | |
d62a17ae | 2148 | sl = RFAPI_RDINDEX(rn); |
2149 | if (!sl) | |
2150 | return NULL; | |
65efcfce | 2151 | |
1e20238a | 2152 | #ifdef DEBUG_BI_SEARCH |
d62a17ae | 2153 | { |
872ed4c7 | 2154 | char buf_aux_pfx[PREFIX_STRLEN]; |
d62a17ae | 2155 | |
d62a17ae | 2156 | if (aux_prefix) { |
872ed4c7 DS |
2157 | prefix2str(aux_prefix, buf_aux_pfx, |
2158 | sizeof(buf_aux_pfx)); | |
06b9f471 | 2159 | } else |
9825c71e | 2160 | strlcpy(buf_aux_pfx, "(nil)", sizeof(buf_aux_pfx)); |
d62a17ae | 2161 | |
c4f64ea9 | 2162 | vnc_zlog_debug_verbose( |
4a8cd6ad | 2163 | "%s want prd=%pRDP, peer=%p, aux_prefix=%s", __func__, |
c4f64ea9 | 2164 | prd, peer, buf_aux_pfx); |
d62a17ae | 2165 | rfapiItBiIndexDump(rn); |
2166 | } | |
65efcfce LB |
2167 | #endif |
2168 | ||
d62a17ae | 2169 | /* threshold is a WAG */ |
2170 | if (sl->count < 3) { | |
1e20238a | 2171 | #ifdef DEBUG_BI_SEARCH |
d62a17ae | 2172 | vnc_zlog_debug_verbose("%s: short list algorithm", __func__); |
65efcfce | 2173 | #endif |
d62a17ae | 2174 | /* if short list, linear search might be faster */ |
40381db7 DS |
2175 | for (bpi_result = rn->info; bpi_result; |
2176 | bpi_result = bpi_result->next) { | |
1e20238a | 2177 | #ifdef DEBUG_BI_SEARCH |
c4f64ea9 | 2178 | vnc_zlog_debug_verbose( |
4a8cd6ad | 2179 | "%s: bpi has prd=%pRDP, peer=%p", __func__, |
c4f64ea9 DA |
2180 | &bpi_result->extra->vnc.import.rd, |
2181 | bpi_result->peer); | |
65efcfce | 2182 | #endif |
40381db7 DS |
2183 | if (peer == bpi_result->peer |
2184 | && !prefix_cmp((struct prefix *)&bpi_result->extra | |
d62a17ae | 2185 | ->vnc.import.rd, |
2186 | (struct prefix *)prd)) { | |
65efcfce | 2187 | |
1e20238a | 2188 | #ifdef DEBUG_BI_SEARCH |
d62a17ae | 2189 | vnc_zlog_debug_verbose( |
2190 | "%s: peer and RD same, doing aux_prefix check", | |
2191 | __func__); | |
65efcfce | 2192 | #endif |
d62a17ae | 2193 | if (!aux_prefix |
40381db7 DS |
2194 | || !prefix_cmp( |
2195 | aux_prefix, | |
2196 | &bpi_result->extra->vnc.import | |
2197 | .aux_prefix)) { | |
65efcfce | 2198 | |
1e20238a | 2199 | #ifdef DEBUG_BI_SEARCH |
d62a17ae | 2200 | vnc_zlog_debug_verbose("%s: match", |
2201 | __func__); | |
65efcfce | 2202 | #endif |
d62a17ae | 2203 | break; |
2204 | } | |
2205 | } | |
2206 | } | |
40381db7 | 2207 | return bpi_result; |
d62a17ae | 2208 | } |
2209 | ||
40381db7 DS |
2210 | bpi_fake.peer = peer; |
2211 | bpi_fake.extra = &bpi_extra; | |
c4efd0f4 | 2212 | bpi_fake.extra->vnc.import.rd = *prd; |
d62a17ae | 2213 | if (aux_prefix) { |
40381db7 | 2214 | bpi_fake.extra->vnc.import.aux_prefix = *aux_prefix; |
d62a17ae | 2215 | } else { |
2216 | /* wildcard */ | |
40381db7 DS |
2217 | bpi_fake.extra->vnc.import.aux_prefix.family = AF_ETHERNET; |
2218 | bpi_fake.extra->vnc.import.aux_prefix.prefixlen = 1; | |
d62a17ae | 2219 | } |
2220 | ||
40381db7 | 2221 | rc = skiplist_search(sl, (void *)&bpi_fake, (void *)&bpi_result); |
d62a17ae | 2222 | |
2223 | if (rc) { | |
1e20238a | 2224 | #ifdef DEBUG_BI_SEARCH |
d62a17ae | 2225 | vnc_zlog_debug_verbose("%s: no match", __func__); |
65efcfce | 2226 | #endif |
d62a17ae | 2227 | return NULL; |
2228 | } | |
65efcfce | 2229 | |
1e20238a | 2230 | #ifdef DEBUG_BI_SEARCH |
40381db7 | 2231 | vnc_zlog_debug_verbose("%s: matched bpi=%p", __func__, bpi_result); |
65efcfce LB |
2232 | #endif |
2233 | ||
40381db7 | 2234 | return bpi_result; |
65efcfce LB |
2235 | } |
2236 | ||
fe08ba7e | 2237 | static void rfapiItBiIndexDel(struct agg_node *rn, /* Import table VPN node */ |
40381db7 | 2238 | struct bgp_path_info *bpi) /* old BPI */ |
65efcfce | 2239 | { |
d62a17ae | 2240 | struct skiplist *sl; |
2241 | int rc; | |
65efcfce | 2242 | |
4a8cd6ad | 2243 | vnc_zlog_debug_verbose("%s: bpi %p, peer %p, rd %pRDP", __func__, bpi, |
c4f64ea9 | 2244 | bpi->peer, &bpi->extra->vnc.import.rd); |
65efcfce | 2245 | |
d62a17ae | 2246 | sl = RFAPI_RDINDEX(rn); |
2247 | assert(sl); | |
65efcfce | 2248 | |
40381db7 | 2249 | rc = skiplist_delete(sl, (void *)(bpi), (void *)bpi); |
d62a17ae | 2250 | if (rc) { |
2251 | rfapiItBiIndexDump(rn); | |
2252 | } | |
2253 | assert(!rc); | |
65efcfce | 2254 | |
fe08ba7e | 2255 | agg_unlock_node(rn); /* for skiplist entry */ |
65efcfce | 2256 | |
40381db7 | 2257 | /* NB: BPIs in import tables are not refcounted */ |
65efcfce LB |
2258 | } |
2259 | ||
2260 | /* | |
2261 | * Add a backreference at the ENCAP node to the VPN route that | |
2262 | * refers to it | |
2263 | */ | |
4b7e6066 DS |
2264 | static void |
2265 | rfapiMonitorEncapAdd(struct rfapi_import_table *import_table, | |
40381db7 DS |
2266 | struct prefix *p, /* VN address */ |
2267 | struct agg_node *vpn_rn, /* VPN node */ | |
2268 | struct bgp_path_info *vpn_bpi) /* VPN bpi/route */ | |
65efcfce | 2269 | { |
d62a17ae | 2270 | afi_t afi = family2afi(p->family); |
fe08ba7e | 2271 | struct agg_node *rn; |
d62a17ae | 2272 | struct rfapi_monitor_encap *m; |
2273 | ||
2274 | assert(afi); | |
fe08ba7e | 2275 | rn = agg_node_get(import_table->imported_encap[afi], p); /* locks rn */ |
d62a17ae | 2276 | assert(rn); |
2277 | ||
2278 | m = XCALLOC(MTYPE_RFAPI_MONITOR_ENCAP, | |
2279 | sizeof(struct rfapi_monitor_encap)); | |
d62a17ae | 2280 | |
2281 | m->node = vpn_rn; | |
40381db7 | 2282 | m->bpi = vpn_bpi; |
d62a17ae | 2283 | m->rn = rn; |
2284 | ||
2285 | /* insert to encap node's list */ | |
2286 | m->next = RFAPI_MONITOR_ENCAP(rn); | |
2287 | if (m->next) | |
2288 | m->next->prev = m; | |
2289 | RFAPI_MONITOR_ENCAP_W_ALLOC(rn) = m; | |
2290 | ||
2291 | /* for easy lookup when deleting vpn route */ | |
40381db7 | 2292 | vpn_bpi->extra->vnc.import.hme = m; |
d62a17ae | 2293 | |
2294 | vnc_zlog_debug_verbose( | |
40381db7 DS |
2295 | "%s: it=%p, vpn_bpi=%p, afi=%d, encap rn=%p, setting vpn_bpi->extra->vnc.import.hme=%p", |
2296 | __func__, import_table, vpn_bpi, afi, rn, m); | |
d62a17ae | 2297 | |
2298 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, 0); | |
40381db7 | 2299 | bgp_attr_intern(vpn_bpi->attr); |
65efcfce LB |
2300 | } |
2301 | ||
40381db7 | 2302 | static void rfapiMonitorEncapDelete(struct bgp_path_info *vpn_bpi) |
65efcfce | 2303 | { |
d62a17ae | 2304 | /* |
2305 | * Remove encap monitor | |
2306 | */ | |
40381db7 DS |
2307 | vnc_zlog_debug_verbose("%s: vpn_bpi=%p", __func__, vpn_bpi); |
2308 | if (vpn_bpi->extra) { | |
2309 | struct rfapi_monitor_encap *hme = | |
2310 | vpn_bpi->extra->vnc.import.hme; | |
d62a17ae | 2311 | |
2312 | if (hme) { | |
2313 | ||
2314 | vnc_zlog_debug_verbose("%s: hme=%p", __func__, hme); | |
2315 | ||
2316 | /* Refcount checking takes too long here */ | |
2317 | // RFAPI_CHECK_REFCOUNT(hme->rn, SAFI_ENCAP, 0); | |
2318 | if (hme->next) | |
2319 | hme->next->prev = hme->prev; | |
2320 | if (hme->prev) | |
2321 | hme->prev->next = hme->next; | |
2322 | else | |
2323 | RFAPI_MONITOR_ENCAP_W_ALLOC(hme->rn) = | |
2324 | hme->next; | |
2325 | /* Refcount checking takes too long here */ | |
2326 | // RFAPI_CHECK_REFCOUNT(hme->rn, SAFI_ENCAP, 1); | |
2327 | ||
2328 | /* see if the struct rfapi_it_extra is empty and can be | |
2329 | * freed */ | |
2330 | rfapiMonitorExtraPrune(SAFI_ENCAP, hme->rn); | |
2331 | ||
fe08ba7e | 2332 | agg_unlock_node(hme->rn); /* decr ref count */ |
d62a17ae | 2333 | XFREE(MTYPE_RFAPI_MONITOR_ENCAP, hme); |
40381db7 | 2334 | vpn_bpi->extra->vnc.import.hme = NULL; |
d62a17ae | 2335 | } |
2336 | } | |
65efcfce LB |
2337 | } |
2338 | ||
2339 | /* | |
2340 | * quagga lib/thread.h says this must return int even though | |
2341 | * it doesn't do anything with the return value | |
2342 | */ | |
cc9f21da | 2343 | static void rfapiWithdrawTimerVPN(struct thread *t) |
65efcfce | 2344 | { |
c3aaa89a | 2345 | struct rfapi_withdraw *wcb = THREAD_ARG(t); |
40381db7 | 2346 | struct bgp_path_info *bpi = wcb->info; |
d62a17ae | 2347 | struct bgp *bgp = bgp_get_default(); |
26a3ffd6 | 2348 | const struct prefix *p; |
d62a17ae | 2349 | struct rfapi_monitor_vpn *moved; |
2350 | afi_t afi; | |
2351 | ||
f4c713ae LB |
2352 | if (bgp == NULL) { |
2353 | vnc_zlog_debug_verbose( | |
2354 | "%s: NULL BGP pointer, assume shutdown race condition!!!", | |
2355 | __func__); | |
cc9f21da | 2356 | return; |
f4c713ae | 2357 | } |
892fedb6 | 2358 | if (CHECK_FLAG(bgp->flags, BGP_FLAG_DELETE_IN_PROGRESS)) { |
f4c713ae | 2359 | vnc_zlog_debug_verbose( |
892fedb6 DA |
2360 | "%s: BGP delete in progress, assume shutdown race condition!!!", |
2361 | __func__); | |
cc9f21da | 2362 | return; |
f4c713ae | 2363 | } |
d62a17ae | 2364 | assert(wcb->node); |
40381db7 | 2365 | assert(bpi); |
d62a17ae | 2366 | assert(wcb->import_table); |
40381db7 | 2367 | assert(bpi->extra); |
d62a17ae | 2368 | |
2369 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_MPLS_VPN, wcb->lockoffset); | |
2370 | ||
26a3ffd6 DS |
2371 | vnc_zlog_debug_verbose("%s: removing bpi %p at prefix %pRN", __func__, |
2372 | bpi, wcb->node); | |
d62a17ae | 2373 | |
2374 | /* | |
2375 | * Remove the route (doubly-linked) | |
2376 | */ | |
40381db7 DS |
2377 | if (CHECK_FLAG(bpi->flags, BGP_PATH_VALID) |
2378 | && VALID_INTERIOR_TYPE(bpi->type)) | |
d62a17ae | 2379 | RFAPI_MONITOR_EXTERIOR(wcb->node)->valid_interior_count--; |
2380 | ||
26a3ffd6 DS |
2381 | p = agg_node_get_prefix(wcb->node); |
2382 | afi = family2afi(p->family); | |
d62a17ae | 2383 | wcb->import_table->holddown_count[afi] -= 1; /* keep count consistent */ |
40381db7 DS |
2384 | rfapiItBiIndexDel(wcb->node, bpi); |
2385 | rfapiBgpInfoDetach(wcb->node, bpi); /* with removed bpi */ | |
d62a17ae | 2386 | |
2387 | vnc_import_bgp_exterior_del_route_interior(bgp, wcb->import_table, | |
40381db7 | 2388 | wcb->node, bpi); |
d62a17ae | 2389 | |
2390 | ||
2391 | /* | |
2392 | * If VNC is configured to send response remove messages, AND | |
2393 | * if the removed route had a UN address, do response removal | |
2394 | * processing. | |
2395 | */ | |
2396 | if (!(bgp->rfapi_cfg->flags | |
2397 | & BGP_VNC_CONFIG_RESPONSE_REMOVAL_DISABLE)) { | |
2398 | ||
2399 | int has_valid_duplicate = 0; | |
40381db7 | 2400 | struct bgp_path_info *bpii; |
d62a17ae | 2401 | |
2402 | /* | |
2403 | * First check if there are any OTHER routes at this node | |
2404 | * that have the same nexthop and a valid UN address. If | |
2405 | * there are (e.g., from other peers), then the route isn't | |
2406 | * really gone, so skip sending a response removal message. | |
2407 | */ | |
40381db7 DS |
2408 | for (bpii = wcb->node->info; bpii; bpii = bpii->next) { |
2409 | if (rfapiVpnBiSamePtUn(bpi, bpii)) { | |
d62a17ae | 2410 | has_valid_duplicate = 1; |
2411 | break; | |
2412 | } | |
2413 | } | |
2414 | ||
2415 | vnc_zlog_debug_verbose("%s: has_valid_duplicate=%d", __func__, | |
2416 | has_valid_duplicate); | |
2417 | ||
2418 | if (!has_valid_duplicate) { | |
2419 | rfapiRibPendingDeleteRoute(bgp, wcb->import_table, afi, | |
2420 | wcb->node); | |
2421 | } | |
2422 | } | |
2423 | ||
40381db7 | 2424 | rfapiMonitorEncapDelete(bpi); |
d62a17ae | 2425 | |
2426 | /* | |
2427 | * If there are no VPN monitors at this VPN Node A, | |
2428 | * we are done | |
2429 | */ | |
2430 | if (!RFAPI_MONITOR_VPN(wcb->node)) { | |
2431 | vnc_zlog_debug_verbose("%s: no VPN monitors at this node", | |
2432 | __func__); | |
2433 | goto done; | |
2434 | } | |
2435 | ||
2436 | /* | |
2437 | * rfapiMonitorMoveShorter only moves monitors if there are | |
2438 | * no remaining valid routes at the current node | |
2439 | */ | |
2440 | moved = rfapiMonitorMoveShorter(wcb->node, 1); | |
2441 | ||
2442 | if (moved) { | |
2443 | rfapiMonitorMovedUp(wcb->import_table, wcb->node, moved->node, | |
2444 | moved); | |
2445 | } | |
65efcfce LB |
2446 | |
2447 | done: | |
d62a17ae | 2448 | /* |
40381db7 | 2449 | * Free VPN bpi |
d62a17ae | 2450 | */ |
40381db7 | 2451 | rfapiBgpInfoFree(bpi); |
d62a17ae | 2452 | wcb->info = NULL; |
2453 | ||
2454 | /* | |
2455 | * If route count at this node has gone to 0, withdraw exported prefix | |
2456 | */ | |
2457 | if (!wcb->node->info) { | |
2458 | /* see if the struct rfapi_it_extra is empty and can be freed */ | |
2459 | rfapiMonitorExtraPrune(SAFI_MPLS_VPN, wcb->node); | |
2460 | vnc_direct_bgp_del_prefix(bgp, wcb->import_table, wcb->node); | |
2461 | vnc_zebra_del_prefix(bgp, wcb->import_table, wcb->node); | |
2462 | } else { | |
2463 | /* | |
2464 | * nexthop change event | |
2465 | * vnc_direct_bgp_add_prefix() will recompute the VN addr | |
2466 | * ecommunity | |
2467 | */ | |
2468 | vnc_direct_bgp_add_prefix(bgp, wcb->import_table, wcb->node); | |
2469 | } | |
2470 | ||
2471 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_MPLS_VPN, 1 + wcb->lockoffset); | |
fe08ba7e | 2472 | agg_unlock_node(wcb->node); /* decr ref count */ |
d62a17ae | 2473 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); |
65efcfce LB |
2474 | } |
2475 | ||
2476 | /* | |
2477 | * This works for multiprotocol extension, but not for plain ol' | |
2478 | * unicast IPv4 because that nexthop is stored in attr->nexthop | |
2479 | */ | |
d62a17ae | 2480 | void rfapiNexthop2Prefix(struct attr *attr, struct prefix *p) |
65efcfce | 2481 | { |
d62a17ae | 2482 | assert(p); |
2483 | assert(attr); | |
2484 | ||
2485 | memset(p, 0, sizeof(struct prefix)); | |
2486 | ||
2487 | switch (p->family = BGP_MP_NEXTHOP_FAMILY(attr->mp_nexthop_len)) { | |
2488 | case AF_INET: | |
2489 | p->u.prefix4 = attr->mp_nexthop_global_in; | |
30360041 | 2490 | p->prefixlen = IPV4_MAX_BITLEN; |
d62a17ae | 2491 | break; |
2492 | ||
2493 | case AF_INET6: | |
2494 | p->u.prefix6 = attr->mp_nexthop_global; | |
135e9bdb | 2495 | p->prefixlen = IPV6_MAX_BITLEN; |
d62a17ae | 2496 | break; |
2497 | ||
2498 | default: | |
2499 | vnc_zlog_debug_verbose("%s: Family is unknown = %d", __func__, | |
2500 | p->family); | |
2501 | } | |
65efcfce LB |
2502 | } |
2503 | ||
d62a17ae | 2504 | void rfapiUnicastNexthop2Prefix(afi_t afi, struct attr *attr, struct prefix *p) |
65efcfce | 2505 | { |
d62a17ae | 2506 | if (afi == AFI_IP) { |
2507 | p->family = AF_INET; | |
30360041 | 2508 | p->prefixlen = IPV4_MAX_BITLEN; |
d62a17ae | 2509 | p->u.prefix4 = attr->nexthop; |
2510 | } else { | |
2511 | rfapiNexthop2Prefix(attr, p); | |
2512 | } | |
65efcfce LB |
2513 | } |
2514 | ||
d62a17ae | 2515 | static int rfapiAttrNexthopAddrDifferent(struct prefix *p1, struct prefix *p2) |
65efcfce | 2516 | { |
d62a17ae | 2517 | if (!p1 || !p2) { |
2518 | vnc_zlog_debug_verbose("%s: p1 or p2 is NULL", __func__); | |
2519 | return 1; | |
2520 | } | |
2521 | ||
2522 | /* | |
2523 | * Are address families the same? | |
2524 | */ | |
2525 | if (p1->family != p2->family) { | |
2526 | return 1; | |
2527 | } | |
2528 | ||
2529 | switch (p1->family) { | |
2530 | case AF_INET: | |
2531 | if (IPV4_ADDR_SAME(&p1->u.prefix4, &p2->u.prefix4)) | |
2532 | return 0; | |
2533 | break; | |
2534 | ||
2535 | case AF_INET6: | |
2536 | if (IPV6_ADDR_SAME(&p1->u.prefix6, &p2->u.prefix6)) | |
2537 | return 0; | |
2538 | break; | |
2539 | ||
2540 | default: | |
2541 | assert(1); | |
2542 | } | |
2543 | ||
2544 | return 1; | |
65efcfce LB |
2545 | } |
2546 | ||
40381db7 DS |
2547 | static void rfapiCopyUnEncap2VPN(struct bgp_path_info *encap_bpi, |
2548 | struct bgp_path_info *vpn_bpi) | |
65efcfce | 2549 | { |
40381db7 DS |
2550 | if (!vpn_bpi || !vpn_bpi->extra) { |
2551 | zlog_warn("%s: no vpn bpi attr/extra, can't copy UN address", | |
d62a17ae | 2552 | __func__); |
2553 | return; | |
2554 | } | |
2555 | ||
40381db7 | 2556 | switch (BGP_MP_NEXTHOP_FAMILY(encap_bpi->attr->mp_nexthop_len)) { |
d62a17ae | 2557 | case AF_INET: |
2558 | ||
2559 | /* | |
2560 | * instrumentation to debug segfault of 091127 | |
2561 | */ | |
40381db7 | 2562 | vnc_zlog_debug_verbose("%s: vpn_bpi=%p", __func__, vpn_bpi); |
e6b457ac DA |
2563 | vnc_zlog_debug_verbose("%s: vpn_bpi->extra=%p", __func__, |
2564 | vpn_bpi->extra); | |
d62a17ae | 2565 | |
40381db7 DS |
2566 | vpn_bpi->extra->vnc.import.un_family = AF_INET; |
2567 | vpn_bpi->extra->vnc.import.un.addr4 = | |
2568 | encap_bpi->attr->mp_nexthop_global_in; | |
d62a17ae | 2569 | break; |
2570 | ||
2571 | case AF_INET6: | |
40381db7 DS |
2572 | vpn_bpi->extra->vnc.import.un_family = AF_INET6; |
2573 | vpn_bpi->extra->vnc.import.un.addr6 = | |
2574 | encap_bpi->attr->mp_nexthop_global; | |
d62a17ae | 2575 | break; |
2576 | ||
2577 | default: | |
2578 | zlog_warn("%s: invalid encap nexthop length: %d", __func__, | |
40381db7 | 2579 | encap_bpi->attr->mp_nexthop_len); |
c7ca5ccf | 2580 | vpn_bpi->extra->vnc.import.un_family = AF_UNSPEC; |
d62a17ae | 2581 | break; |
2582 | } | |
65efcfce LB |
2583 | } |
2584 | ||
2585 | /* | |
2586 | * returns 0 on success, nonzero on error | |
2587 | */ | |
40381db7 DS |
2588 | static int |
2589 | rfapiWithdrawEncapUpdateCachedUn(struct rfapi_import_table *import_table, | |
2590 | struct bgp_path_info *encap_bpi, | |
2591 | struct agg_node *vpn_rn, | |
2592 | struct bgp_path_info *vpn_bpi) | |
65efcfce | 2593 | { |
40381db7 | 2594 | if (!encap_bpi) { |
d62a17ae | 2595 | |
2596 | /* | |
2597 | * clear cached UN address | |
2598 | */ | |
40381db7 | 2599 | if (!vpn_bpi || !vpn_bpi->extra) { |
d62a17ae | 2600 | zlog_warn( |
40381db7 | 2601 | "%s: missing VPN bpi/extra, can't clear UN addr", |
d62a17ae | 2602 | __func__); |
2603 | return 1; | |
2604 | } | |
c7ca5ccf | 2605 | vpn_bpi->extra->vnc.import.un_family = AF_UNSPEC; |
40381db7 DS |
2606 | memset(&vpn_bpi->extra->vnc.import.un, 0, |
2607 | sizeof(vpn_bpi->extra->vnc.import.un)); | |
2608 | if (CHECK_FLAG(vpn_bpi->flags, BGP_PATH_VALID)) { | |
2609 | if (rfapiGetVncTunnelUnAddr(vpn_bpi->attr, NULL)) { | |
2610 | UNSET_FLAG(vpn_bpi->flags, BGP_PATH_VALID); | |
2611 | if (VALID_INTERIOR_TYPE(vpn_bpi->type)) | |
d62a17ae | 2612 | RFAPI_MONITOR_EXTERIOR(vpn_rn) |
2613 | ->valid_interior_count--; | |
2614 | /* signal interior route withdrawal to | |
2615 | * import-exterior */ | |
2616 | vnc_import_bgp_exterior_del_route_interior( | |
2617 | bgp_get_default(), import_table, vpn_rn, | |
40381db7 | 2618 | vpn_bpi); |
d62a17ae | 2619 | } |
2620 | } | |
2621 | ||
2622 | } else { | |
40381db7 DS |
2623 | if (!vpn_bpi) { |
2624 | zlog_warn("%s: missing VPN bpi, can't clear UN addr", | |
d62a17ae | 2625 | __func__); |
2626 | return 1; | |
2627 | } | |
40381db7 DS |
2628 | rfapiCopyUnEncap2VPN(encap_bpi, vpn_bpi); |
2629 | if (!CHECK_FLAG(vpn_bpi->flags, BGP_PATH_VALID)) { | |
2630 | SET_FLAG(vpn_bpi->flags, BGP_PATH_VALID); | |
2631 | if (VALID_INTERIOR_TYPE(vpn_bpi->type)) | |
d62a17ae | 2632 | RFAPI_MONITOR_EXTERIOR(vpn_rn) |
2633 | ->valid_interior_count++; | |
2634 | /* signal interior route withdrawal to import-exterior | |
2635 | */ | |
2636 | vnc_import_bgp_exterior_add_route_interior( | |
2637 | bgp_get_default(), import_table, vpn_rn, | |
40381db7 | 2638 | vpn_bpi); |
d62a17ae | 2639 | } |
2640 | } | |
2641 | return 0; | |
65efcfce LB |
2642 | } |
2643 | ||
cc9f21da | 2644 | static void rfapiWithdrawTimerEncap(struct thread *t) |
65efcfce | 2645 | { |
c3aaa89a | 2646 | struct rfapi_withdraw *wcb = THREAD_ARG(t); |
40381db7 | 2647 | struct bgp_path_info *bpi = wcb->info; |
d62a17ae | 2648 | int was_first_route = 0; |
2649 | struct rfapi_monitor_encap *em; | |
2650 | struct skiplist *vpn_node_sl = skiplist_new(0, NULL, NULL); | |
2651 | ||
2652 | assert(wcb->node); | |
40381db7 | 2653 | assert(bpi); |
d62a17ae | 2654 | assert(wcb->import_table); |
2655 | ||
2656 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_ENCAP, 0); | |
2657 | ||
40381db7 | 2658 | if (wcb->node->info == bpi) |
d62a17ae | 2659 | was_first_route = 1; |
2660 | ||
2661 | /* | |
40381db7 | 2662 | * Remove the route/bpi and free it |
d62a17ae | 2663 | */ |
40381db7 DS |
2664 | rfapiBgpInfoDetach(wcb->node, bpi); |
2665 | rfapiBgpInfoFree(bpi); | |
d62a17ae | 2666 | |
2667 | if (!was_first_route) | |
2668 | goto done; | |
2669 | ||
2670 | for (em = RFAPI_MONITOR_ENCAP(wcb->node); em; em = em->next) { | |
2671 | ||
2672 | /* | |
40381db7 DS |
2673 | * Update monitoring VPN BPIs with new encap info at the |
2674 | * head of the encap bpi chain (which could be NULL after | |
2675 | * removing the expiring bpi above) | |
d62a17ae | 2676 | */ |
2677 | if (rfapiWithdrawEncapUpdateCachedUn(wcb->import_table, | |
2678 | wcb->node->info, em->node, | |
40381db7 | 2679 | em->bpi)) |
d62a17ae | 2680 | continue; |
2681 | ||
2682 | /* | |
2683 | * Build a list of unique VPN nodes referenced by these | |
2684 | * monitors. | |
2685 | * Use a skiplist for speed. | |
2686 | */ | |
2687 | skiplist_insert(vpn_node_sl, em->node, em->node); | |
2688 | } | |
2689 | ||
2690 | ||
2691 | /* | |
2692 | * for each VPN node referenced in the ENCAP monitors: | |
2693 | */ | |
fe08ba7e | 2694 | struct agg_node *rn; |
d62a17ae | 2695 | while (!skiplist_first(vpn_node_sl, (void **)&rn, NULL)) { |
2696 | if (!wcb->node->info) { | |
2697 | struct rfapi_monitor_vpn *moved; | |
2698 | ||
2699 | moved = rfapiMonitorMoveShorter(rn, 0); | |
2700 | if (moved) { | |
2701 | // rfapiDoRouteCallback(wcb->import_table, | |
2702 | // moved->node, moved); | |
2703 | rfapiMonitorMovedUp(wcb->import_table, rn, | |
2704 | moved->node, moved); | |
2705 | } | |
2706 | } else { | |
2707 | // rfapiDoRouteCallback(wcb->import_table, rn, NULL); | |
2708 | rfapiMonitorItNodeChanged(wcb->import_table, rn, NULL); | |
2709 | } | |
2710 | skiplist_delete_first(vpn_node_sl); | |
2711 | } | |
65efcfce LB |
2712 | |
2713 | done: | |
d62a17ae | 2714 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_ENCAP, 1); |
fe08ba7e | 2715 | agg_unlock_node(wcb->node); /* decr ref count */ |
d62a17ae | 2716 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); |
2717 | skiplist_free(vpn_node_sl); | |
65efcfce LB |
2718 | } |
2719 | ||
2720 | ||
2721 | /* | |
2722 | * Works for both VPN and ENCAP routes; timer_service_func is different | |
2723 | * in each case | |
2724 | */ | |
2725 | static void | |
d62a17ae | 2726 | rfapiBiStartWithdrawTimer(struct rfapi_import_table *import_table, |
40381db7 | 2727 | struct agg_node *rn, struct bgp_path_info *bpi, |
4b7e6066 | 2728 | afi_t afi, safi_t safi, |
cc9f21da | 2729 | void (*timer_service_func)(struct thread *)) |
65efcfce | 2730 | { |
d62a17ae | 2731 | uint32_t lifetime; |
2732 | struct rfapi_withdraw *wcb; | |
2733 | ||
40381db7 | 2734 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
a8fd6fde QY |
2735 | /* |
2736 | * Already on the path to being withdrawn, | |
2737 | * should already have a timer set up to | |
2738 | * delete it. | |
2739 | */ | |
2740 | vnc_zlog_debug_verbose( | |
2741 | "%s: already being withdrawn, do nothing", __func__); | |
2742 | return; | |
2743 | } | |
d62a17ae | 2744 | |
40381db7 | 2745 | rfapiGetVncLifetime(bpi->attr, &lifetime); |
d62a17ae | 2746 | vnc_zlog_debug_verbose("%s: VNC lifetime is %u", __func__, lifetime); |
2747 | ||
2748 | /* | |
2749 | * withdrawn routes get to hang around for a while | |
2750 | */ | |
40381db7 | 2751 | SET_FLAG(bpi->flags, BGP_PATH_REMOVED); |
d62a17ae | 2752 | |
2753 | /* set timer to remove the route later */ | |
2754 | lifetime = rfapiGetHolddownFromLifetime(lifetime); | |
2755 | vnc_zlog_debug_verbose("%s: using timeout %u", __func__, lifetime); | |
2756 | ||
2757 | /* | |
2758 | * Stash import_table, node, and info for use by timer | |
2759 | * service routine, which is supposed to free the wcb. | |
2760 | */ | |
2761 | wcb = XCALLOC(MTYPE_RFAPI_WITHDRAW, sizeof(struct rfapi_withdraw)); | |
d62a17ae | 2762 | wcb->node = rn; |
40381db7 | 2763 | wcb->info = bpi; |
d62a17ae | 2764 | wcb->import_table = import_table; |
40381db7 | 2765 | bgp_attr_intern(bpi->attr); |
d62a17ae | 2766 | |
2767 | if (VNC_DEBUG(VERBOSE)) { | |
2768 | vnc_zlog_debug_verbose( | |
40381db7 | 2769 | "%s: wcb values: node=%p, info=%p, import_table=%p (bpi follows)", |
d62a17ae | 2770 | __func__, wcb->node, wcb->info, wcb->import_table); |
40381db7 | 2771 | rfapiPrintBi(NULL, bpi); |
d62a17ae | 2772 | } |
2773 | ||
2774 | ||
40381db7 | 2775 | assert(bpi->extra); |
d62a17ae | 2776 | if (lifetime > UINT32_MAX / 1001) { |
2777 | /* sub-optimal case, but will probably never happen */ | |
40381db7 | 2778 | bpi->extra->vnc.import.timer = NULL; |
d62a17ae | 2779 | thread_add_timer(bm->master, timer_service_func, wcb, lifetime, |
40381db7 | 2780 | &bpi->extra->vnc.import.timer); |
d62a17ae | 2781 | } else { |
2782 | static uint32_t jitter; | |
2783 | uint32_t lifetime_msec; | |
2784 | ||
2785 | /* | |
2786 | * the goal here is to spread out the timers so they are | |
2787 | * sortable in the skip list | |
2788 | */ | |
2789 | if (++jitter >= 1000) | |
2790 | jitter = 0; | |
2791 | ||
2792 | lifetime_msec = (lifetime * 1000) + jitter; | |
2793 | ||
40381db7 | 2794 | bpi->extra->vnc.import.timer = NULL; |
d62a17ae | 2795 | thread_add_timer_msec(bm->master, timer_service_func, wcb, |
2796 | lifetime_msec, | |
40381db7 | 2797 | &bpi->extra->vnc.import.timer); |
d62a17ae | 2798 | } |
2799 | ||
1defdda8 | 2800 | /* re-sort route list (BGP_PATH_REMOVED routes are last) */ |
4b7e6066 | 2801 | if (((struct bgp_path_info *)rn->info)->next) { |
40381db7 DS |
2802 | rfapiBgpInfoDetach(rn, bpi); |
2803 | rfapiBgpInfoAttachSorted(rn, bpi, afi, safi); | |
d62a17ae | 2804 | } |
65efcfce LB |
2805 | } |
2806 | ||
2807 | ||
5a1ae2c2 DS |
2808 | typedef void(rfapi_bi_filtered_import_f)(struct rfapi_import_table *table, |
2809 | int action, struct peer *peer, | |
2810 | void *rfd, const struct prefix *prefix, | |
2811 | const struct prefix *aux_prefix, | |
2812 | afi_t afi, struct prefix_rd *prd, | |
2813 | struct attr *attr, uint8_t type, | |
2814 | uint8_t sub_type, uint32_t *label); | |
65efcfce LB |
2815 | |
2816 | ||
d62a17ae | 2817 | static void rfapiExpireEncapNow(struct rfapi_import_table *it, |
40381db7 | 2818 | struct agg_node *rn, struct bgp_path_info *bpi) |
65efcfce | 2819 | { |
d62a17ae | 2820 | struct rfapi_withdraw *wcb; |
2821 | struct thread t; | |
2822 | ||
2823 | /* | |
2824 | * pretend we're an expiring timer | |
2825 | */ | |
2826 | wcb = XCALLOC(MTYPE_RFAPI_WITHDRAW, sizeof(struct rfapi_withdraw)); | |
40381db7 | 2827 | wcb->info = bpi; |
d62a17ae | 2828 | wcb->node = rn; |
2829 | wcb->import_table = it; | |
2830 | memset(&t, 0, sizeof(t)); | |
2831 | t.arg = wcb; | |
2832 | rfapiWithdrawTimerEncap(&t); /* frees wcb */ | |
65efcfce LB |
2833 | } |
2834 | ||
d62a17ae | 2835 | static int rfapiGetNexthop(struct attr *attr, struct prefix *prefix) |
65efcfce | 2836 | { |
d62a17ae | 2837 | switch (BGP_MP_NEXTHOP_FAMILY(attr->mp_nexthop_len)) { |
2838 | case AF_INET: | |
2839 | prefix->family = AF_INET; | |
30360041 | 2840 | prefix->prefixlen = IPV4_MAX_BITLEN; |
d62a17ae | 2841 | prefix->u.prefix4 = attr->mp_nexthop_global_in; |
2842 | break; | |
2843 | case AF_INET6: | |
2844 | prefix->family = AF_INET6; | |
135e9bdb | 2845 | prefix->prefixlen = IPV6_MAX_BITLEN; |
d62a17ae | 2846 | prefix->u.prefix6 = attr->mp_nexthop_global; |
2847 | break; | |
2848 | default: | |
2849 | vnc_zlog_debug_verbose("%s: unknown attr->mp_nexthop_len %d", | |
2850 | __func__, attr->mp_nexthop_len); | |
2851 | return EINVAL; | |
2852 | } | |
2853 | return 0; | |
65efcfce LB |
2854 | } |
2855 | ||
d62a17ae | 2856 | /* |
9b6d8fcf | 2857 | * import a bgp_path_info if its route target list intersects with the |
65efcfce LB |
2858 | * import table's route target list |
2859 | */ | |
d62a17ae | 2860 | static void rfapiBgpInfoFilteredImportEncap( |
2861 | struct rfapi_import_table *import_table, int action, struct peer *peer, | |
2862 | void *rfd, /* set for looped back routes */ | |
5a1ae2c2 DS |
2863 | const struct prefix *p, |
2864 | const struct prefix *aux_prefix, /* Unused for encap routes */ | |
d62a17ae | 2865 | afi_t afi, struct prefix_rd *prd, |
9b6d8fcf | 2866 | struct attr *attr, /* part of bgp_path_info */ |
5a1ae2c2 | 2867 | uint8_t type, /* part of bgp_path_info */ |
9b6d8fcf DS |
2868 | uint8_t sub_type, /* part of bgp_path_info */ |
2869 | uint32_t *label) /* part of bgp_path_info */ | |
65efcfce | 2870 | { |
fe08ba7e DS |
2871 | struct agg_table *rt = NULL; |
2872 | struct agg_node *rn; | |
4b7e6066 | 2873 | struct bgp_path_info *info_new; |
40381db7 | 2874 | struct bgp_path_info *bpi; |
4b7e6066 | 2875 | struct bgp_path_info *next; |
d62a17ae | 2876 | char buf[BUFSIZ]; |
2877 | ||
40381db7 DS |
2878 | struct prefix p_firstbpi_old; |
2879 | struct prefix p_firstbpi_new; | |
d62a17ae | 2880 | int replacing = 0; |
2881 | const char *action_str = NULL; | |
2882 | struct prefix un_prefix; | |
2883 | ||
2884 | struct bgp *bgp; | |
2885 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
2886 | ||
2887 | switch (action) { | |
2888 | case FIF_ACTION_UPDATE: | |
2889 | action_str = "update"; | |
2890 | break; | |
2891 | case FIF_ACTION_WITHDRAW: | |
2892 | action_str = "withdraw"; | |
2893 | break; | |
2894 | case FIF_ACTION_KILL: | |
2895 | action_str = "kill"; | |
2896 | break; | |
2897 | default: | |
2898 | assert(0); | |
2899 | break; | |
2900 | } | |
2901 | ||
2902 | vnc_zlog_debug_verbose( | |
2903 | "%s: entry: %s: prefix %s/%d", __func__, action_str, | |
07380148 DA |
2904 | inet_ntop(p->family, &p->u.prefix, buf, sizeof(buf)), |
2905 | p->prefixlen); | |
d62a17ae | 2906 | |
40381db7 DS |
2907 | memset(&p_firstbpi_old, 0, sizeof(p_firstbpi_old)); |
2908 | memset(&p_firstbpi_new, 0, sizeof(p_firstbpi_new)); | |
d62a17ae | 2909 | |
2910 | if (action == FIF_ACTION_UPDATE) { | |
2911 | /* | |
2912 | * Compare rt lists. If no intersection, don't import this route | |
2913 | * On a withdraw, peer and RD are sufficient to determine if | |
2914 | * we should act. | |
2915 | */ | |
b53e67a3 | 2916 | if (!attr || !bgp_attr_get_ecommunity(attr)) { |
d62a17ae | 2917 | |
2918 | vnc_zlog_debug_verbose( | |
2919 | "%s: attr, extra, or ecommunity missing, not importing", | |
2920 | __func__); | |
2921 | return; | |
2922 | } | |
1e20238a | 2923 | #ifdef RFAPI_REQUIRE_ENCAP_BEEC |
b53e67a3 DA |
2924 | if (!rfapiEcommunitiesMatchBeec( |
2925 | bgp_attr_get_ecommunity(attr))) { | |
d62a17ae | 2926 | vnc_zlog_debug_verbose( |
2927 | "%s: it=%p: no match for BGP Encapsulation ecommunity", | |
2928 | __func__, import_table); | |
2929 | return; | |
2930 | } | |
65efcfce | 2931 | #endif |
b53e67a3 DA |
2932 | if (!rfapiEcommunitiesIntersect( |
2933 | import_table->rt_import_list, | |
2934 | bgp_attr_get_ecommunity(attr))) { | |
d62a17ae | 2935 | |
2936 | vnc_zlog_debug_verbose( | |
2937 | "%s: it=%p: no ecommunity intersection", | |
2938 | __func__, import_table); | |
2939 | return; | |
2940 | } | |
2941 | ||
2942 | /* | |
2943 | * Updates must also have a nexthop address | |
2944 | */ | |
2945 | memset(&un_prefix, 0, | |
2946 | sizeof(un_prefix)); /* keep valgrind happy */ | |
2947 | if (rfapiGetNexthop(attr, &un_prefix)) { | |
2948 | vnc_zlog_debug_verbose("%s: missing nexthop address", | |
2949 | __func__); | |
2950 | return; | |
2951 | } | |
2952 | } | |
2953 | ||
2954 | /* | |
2955 | * Figure out which radix tree the route would go into | |
2956 | */ | |
2957 | switch (afi) { | |
2958 | case AFI_IP: | |
2959 | case AFI_IP6: | |
2960 | rt = import_table->imported_encap[afi]; | |
2961 | break; | |
2962 | ||
58cf0823 DS |
2963 | case AFI_UNSPEC: |
2964 | case AFI_L2VPN: | |
2965 | case AFI_MAX: | |
450971aa | 2966 | flog_err(EC_LIB_DEVELOPMENT, "%s: bad afi %d", __func__, afi); |
d62a17ae | 2967 | return; |
2968 | } | |
2969 | ||
2970 | /* | |
fe08ba7e | 2971 | * agg_node_lookup returns a node only if there is at least |
d62a17ae | 2972 | * one route attached. |
2973 | */ | |
fe08ba7e | 2974 | rn = agg_node_lookup(rt, p); |
65efcfce | 2975 | |
1e20238a | 2976 | #ifdef DEBUG_ENCAP_MONITOR |
d62a17ae | 2977 | vnc_zlog_debug_verbose("%s: initial encap lookup(it=%p) rn=%p", |
2978 | __func__, import_table, rn); | |
65efcfce LB |
2979 | #endif |
2980 | ||
d62a17ae | 2981 | if (rn) { |
2982 | ||
2983 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, 1); | |
fe08ba7e | 2984 | agg_unlock_node(rn); /* undo lock in agg_node_lookup */ |
d62a17ae | 2985 | |
2986 | ||
2987 | /* | |
40381db7 | 2988 | * capture nexthop of first bpi |
d62a17ae | 2989 | */ |
2990 | if (rn->info) { | |
2991 | rfapiNexthop2Prefix( | |
4b7e6066 | 2992 | ((struct bgp_path_info *)(rn->info))->attr, |
40381db7 | 2993 | &p_firstbpi_old); |
d62a17ae | 2994 | } |
2995 | ||
40381db7 | 2996 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 2997 | |
2998 | /* | |
9b6d8fcf | 2999 | * Does this bgp_path_info refer to the same route |
d62a17ae | 3000 | * as we are trying to add? |
3001 | */ | |
40381db7 DS |
3002 | vnc_zlog_debug_verbose("%s: comparing BPI %p", __func__, |
3003 | bpi); | |
d62a17ae | 3004 | |
3005 | ||
3006 | /* | |
3007 | * Compare RDs | |
3008 | * | |
40381db7 DS |
3009 | * RD of import table bpi is in |
3010 | * bpi->extra->vnc.import.rd RD of info_orig is in prd | |
d62a17ae | 3011 | */ |
40381db7 DS |
3012 | if (!bpi->extra) { |
3013 | vnc_zlog_debug_verbose("%s: no bpi->extra", | |
d62a17ae | 3014 | __func__); |
3015 | continue; | |
3016 | } | |
3017 | if (prefix_cmp( | |
40381db7 | 3018 | (struct prefix *)&bpi->extra->vnc.import.rd, |
d62a17ae | 3019 | (struct prefix *)prd)) { |
3020 | ||
3021 | vnc_zlog_debug_verbose("%s: prd does not match", | |
3022 | __func__); | |
3023 | continue; | |
3024 | } | |
3025 | ||
3026 | /* | |
3027 | * Compare peers | |
3028 | */ | |
40381db7 | 3029 | if (bpi->peer != peer) { |
d62a17ae | 3030 | vnc_zlog_debug_verbose( |
3031 | "%s: peer does not match", __func__); | |
3032 | continue; | |
3033 | } | |
3034 | ||
40381db7 | 3035 | vnc_zlog_debug_verbose("%s: found matching bpi", |
d62a17ae | 3036 | __func__); |
3037 | ||
40381db7 | 3038 | /* Same route. Delete this bpi, replace with new one */ |
d62a17ae | 3039 | |
3040 | if (action == FIF_ACTION_WITHDRAW) { | |
3041 | ||
3042 | vnc_zlog_debug_verbose( | |
26a3ffd6 DS |
3043 | "%s: withdrawing at prefix %pRN", |
3044 | __func__, rn); | |
d62a17ae | 3045 | |
3046 | rfapiBiStartWithdrawTimer( | |
40381db7 | 3047 | import_table, rn, bpi, afi, SAFI_ENCAP, |
d62a17ae | 3048 | rfapiWithdrawTimerEncap); |
3049 | ||
3050 | } else { | |
3051 | vnc_zlog_debug_verbose( | |
26a3ffd6 | 3052 | "%s: %s at prefix %pRN", __func__, |
d62a17ae | 3053 | ((action == FIF_ACTION_KILL) |
3054 | ? "killing" | |
3055 | : "replacing"), | |
26a3ffd6 | 3056 | rn); |
d62a17ae | 3057 | |
3058 | /* | |
3059 | * If this route is waiting to be deleted | |
3060 | * because of | |
3061 | * a previous withdraw, we must cancel its | |
3062 | * timer. | |
3063 | */ | |
40381db7 DS |
3064 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
3065 | && bpi->extra->vnc.import.timer) { | |
c3aaa89a DS |
3066 | struct rfapi_withdraw *wcb = THREAD_ARG( |
3067 | bpi->extra->vnc.import.timer); | |
d62a17ae | 3068 | |
3069 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
c3aaa89a DS |
3070 | THREAD_OFF( |
3071 | bpi->extra->vnc.import.timer); | |
d62a17ae | 3072 | } |
3073 | ||
3074 | if (action == FIF_ACTION_UPDATE) { | |
40381db7 DS |
3075 | rfapiBgpInfoDetach(rn, bpi); |
3076 | rfapiBgpInfoFree(bpi); | |
d62a17ae | 3077 | replacing = 1; |
3078 | } else { | |
3079 | /* | |
3080 | * Kill: do export stuff when removing | |
40381db7 | 3081 | * bpi |
d62a17ae | 3082 | */ |
3083 | struct rfapi_withdraw *wcb; | |
3084 | struct thread t; | |
3085 | ||
3086 | /* | |
3087 | * pretend we're an expiring timer | |
3088 | */ | |
3089 | wcb = XCALLOC( | |
3090 | MTYPE_RFAPI_WITHDRAW, | |
3091 | sizeof(struct rfapi_withdraw)); | |
40381db7 | 3092 | wcb->info = bpi; |
d62a17ae | 3093 | wcb->node = rn; |
3094 | wcb->import_table = import_table; | |
3095 | memset(&t, 0, sizeof(t)); | |
3096 | t.arg = wcb; | |
3097 | rfapiWithdrawTimerEncap( | |
3098 | &t); /* frees wcb */ | |
3099 | } | |
3100 | } | |
3101 | ||
3102 | break; | |
3103 | } | |
3104 | } | |
3105 | ||
3106 | if (rn) | |
3107 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, replacing ? 1 : 0); | |
3108 | ||
3109 | if (action == FIF_ACTION_WITHDRAW || action == FIF_ACTION_KILL) | |
3110 | return; | |
3111 | ||
3112 | info_new = | |
3113 | rfapiBgpInfoCreate(attr, peer, rfd, prd, type, sub_type, NULL); | |
3114 | ||
3115 | if (rn) { | |
3116 | if (!replacing) | |
40381db7 | 3117 | agg_lock_node(rn); /* incr ref count for new BPI */ |
d62a17ae | 3118 | } else { |
fe08ba7e | 3119 | rn = agg_node_get(rt, p); |
d62a17ae | 3120 | } |
3121 | ||
26a3ffd6 DS |
3122 | vnc_zlog_debug_verbose("%s: (afi=%d, rn=%p) inserting at prefix %pRN", |
3123 | __func__, afi, rn, rn); | |
d62a17ae | 3124 | |
3125 | rfapiBgpInfoAttachSorted(rn, info_new, afi, SAFI_ENCAP); | |
3126 | ||
3127 | /* | |
3128 | * Delete holddown routes from same NVE. See details in | |
3129 | * rfapiBgpInfoFilteredImportVPN() | |
3130 | */ | |
40381db7 | 3131 | for (bpi = info_new->next; bpi; bpi = next) { |
d62a17ae | 3132 | |
3133 | struct prefix pfx_un; | |
3134 | int un_match = 0; | |
3135 | ||
40381db7 DS |
3136 | next = bpi->next; |
3137 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) | |
d62a17ae | 3138 | continue; |
3139 | ||
3140 | /* | |
3141 | * We already match the VN address (it is the prefix | |
3142 | * of the route node) | |
3143 | */ | |
3144 | ||
40381db7 | 3145 | if (!rfapiGetNexthop(bpi->attr, &pfx_un) |
d62a17ae | 3146 | && prefix_same(&pfx_un, &un_prefix)) { |
3147 | ||
3148 | un_match = 1; | |
3149 | } | |
3150 | ||
3151 | if (!un_match) | |
3152 | continue; | |
3153 | ||
3154 | vnc_zlog_debug_verbose( | |
40381db7 | 3155 | "%s: removing holddown bpi matching NVE of new route", |
d62a17ae | 3156 | __func__); |
40381db7 | 3157 | if (bpi->extra->vnc.import.timer) { |
c3aaa89a DS |
3158 | struct rfapi_withdraw *wcb = |
3159 | THREAD_ARG(bpi->extra->vnc.import.timer); | |
d62a17ae | 3160 | |
3161 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
c3aaa89a | 3162 | THREAD_OFF(bpi->extra->vnc.import.timer); |
d62a17ae | 3163 | } |
40381db7 | 3164 | rfapiExpireEncapNow(import_table, rn, bpi); |
d62a17ae | 3165 | } |
3166 | ||
4b7e6066 | 3167 | rfapiNexthop2Prefix(((struct bgp_path_info *)(rn->info))->attr, |
40381db7 | 3168 | &p_firstbpi_new); |
d62a17ae | 3169 | |
3170 | /* | |
3171 | * If the nexthop address of the selected Encap route (i.e., | |
3172 | * the UN address) has changed, then we must update the VPN | |
3173 | * routes that refer to this Encap route and possibly force | |
3174 | * rfapi callbacks. | |
3175 | */ | |
40381db7 | 3176 | if (rfapiAttrNexthopAddrDifferent(&p_firstbpi_old, &p_firstbpi_new)) { |
d62a17ae | 3177 | |
3178 | struct rfapi_monitor_encap *m; | |
3179 | struct rfapi_monitor_encap *mnext; | |
3180 | ||
fe08ba7e | 3181 | struct agg_node *referenced_vpn_prefix; |
d62a17ae | 3182 | |
3183 | /* | |
3184 | * Optimized approach: build radix tree on the fly to | |
3185 | * hold list of VPN nodes referenced by the ENCAP monitors | |
3186 | * | |
3187 | * The nodes in this table correspond to prefixes of VPN routes. | |
3188 | * The "info" pointer of the node points to a chain of | |
3189 | * struct rfapi_monitor_encap, each of which refers to a | |
3190 | * specific VPN node. | |
3191 | */ | |
fe08ba7e | 3192 | struct agg_table *referenced_vpn_table; |
d62a17ae | 3193 | |
fe08ba7e | 3194 | referenced_vpn_table = agg_table_init(); |
d62a17ae | 3195 | |
3196 | /* | |
3197 | * iterate over the set of monitors at this ENCAP node. | |
3198 | */ | |
1e20238a | 3199 | #ifdef DEBUG_ENCAP_MONITOR |
d62a17ae | 3200 | vnc_zlog_debug_verbose("%s: examining monitors at rn=%p", |
3201 | __func__, rn); | |
65efcfce | 3202 | #endif |
d62a17ae | 3203 | for (m = RFAPI_MONITOR_ENCAP(rn); m; m = m->next) { |
26a3ffd6 | 3204 | const struct prefix *p; |
d62a17ae | 3205 | |
3206 | /* | |
40381db7 | 3207 | * For each referenced bpi/route, copy the ENCAP route's |
d62a17ae | 3208 | * nexthop to the VPN route's cached UN address field |
3209 | * and set | |
3210 | * the address family of the cached UN address field. | |
3211 | */ | |
40381db7 DS |
3212 | rfapiCopyUnEncap2VPN(info_new, m->bpi); |
3213 | if (!CHECK_FLAG(m->bpi->flags, BGP_PATH_VALID)) { | |
3214 | SET_FLAG(m->bpi->flags, BGP_PATH_VALID); | |
3215 | if (VALID_INTERIOR_TYPE(m->bpi->type)) | |
d62a17ae | 3216 | RFAPI_MONITOR_EXTERIOR(m->node) |
3217 | ->valid_interior_count++; | |
3218 | vnc_import_bgp_exterior_add_route_interior( | |
40381db7 | 3219 | bgp, import_table, m->node, m->bpi); |
d62a17ae | 3220 | } |
3221 | ||
3222 | /* | |
3223 | * Build a list of unique VPN nodes referenced by these | |
3224 | * monitors | |
3225 | * | |
3226 | * There could be more than one VPN node here with a | |
3227 | * given | |
3228 | * prefix. Those are currently in an unsorted linear | |
3229 | * list | |
3230 | * per prefix. | |
3231 | */ | |
26a3ffd6 | 3232 | p = agg_node_get_prefix(m->node); |
fe08ba7e | 3233 | referenced_vpn_prefix = |
26a3ffd6 | 3234 | agg_node_get(referenced_vpn_table, p); |
d62a17ae | 3235 | assert(referenced_vpn_prefix); |
3236 | for (mnext = referenced_vpn_prefix->info; mnext; | |
3237 | mnext = mnext->next) { | |
3238 | ||
3239 | if (mnext->node == m->node) | |
3240 | break; | |
3241 | } | |
3242 | ||
3243 | if (mnext) { | |
3244 | /* | |
3245 | * already have an entry for this VPN node | |
3246 | */ | |
fe08ba7e | 3247 | agg_unlock_node(referenced_vpn_prefix); |
d62a17ae | 3248 | } else { |
3249 | mnext = XCALLOC( | |
3250 | MTYPE_RFAPI_MONITOR_ENCAP, | |
3251 | sizeof(struct rfapi_monitor_encap)); | |
d62a17ae | 3252 | mnext->node = m->node; |
3253 | mnext->next = referenced_vpn_prefix->info; | |
3254 | referenced_vpn_prefix->info = mnext; | |
3255 | } | |
3256 | } | |
3257 | ||
3258 | /* | |
3259 | * for each VPN node referenced in the ENCAP monitors: | |
3260 | */ | |
fe08ba7e DS |
3261 | for (referenced_vpn_prefix = |
3262 | agg_route_top(referenced_vpn_table); | |
3263 | referenced_vpn_prefix; | |
3264 | referenced_vpn_prefix = | |
3265 | agg_route_next(referenced_vpn_prefix)) { | |
d62a17ae | 3266 | |
3267 | while ((m = referenced_vpn_prefix->info)) { | |
3268 | ||
fe08ba7e | 3269 | struct agg_node *n; |
d62a17ae | 3270 | |
3271 | rfapiMonitorMoveLonger(m->node); | |
fe08ba7e | 3272 | for (n = m->node; n; n = agg_node_parent(n)) { |
d62a17ae | 3273 | // rfapiDoRouteCallback(import_table, n, |
3274 | // NULL); | |
3275 | } | |
3276 | rfapiMonitorItNodeChanged(import_table, m->node, | |
3277 | NULL); | |
3278 | ||
3279 | referenced_vpn_prefix->info = m->next; | |
fe08ba7e | 3280 | agg_unlock_node(referenced_vpn_prefix); |
d62a17ae | 3281 | XFREE(MTYPE_RFAPI_MONITOR_ENCAP, m); |
3282 | } | |
3283 | } | |
fe08ba7e | 3284 | agg_table_finish(referenced_vpn_table); |
d62a17ae | 3285 | } |
3286 | ||
3287 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, 0); | |
65efcfce LB |
3288 | } |
3289 | ||
d62a17ae | 3290 | static void rfapiExpireVpnNow(struct rfapi_import_table *it, |
40381db7 | 3291 | struct agg_node *rn, struct bgp_path_info *bpi, |
d62a17ae | 3292 | int lockoffset) |
65efcfce | 3293 | { |
d62a17ae | 3294 | struct rfapi_withdraw *wcb; |
3295 | struct thread t; | |
3296 | ||
3297 | /* | |
3298 | * pretend we're an expiring timer | |
3299 | */ | |
3300 | wcb = XCALLOC(MTYPE_RFAPI_WITHDRAW, sizeof(struct rfapi_withdraw)); | |
40381db7 | 3301 | wcb->info = bpi; |
d62a17ae | 3302 | wcb->node = rn; |
3303 | wcb->import_table = it; | |
3304 | wcb->lockoffset = lockoffset; | |
3305 | memset(&t, 0, sizeof(t)); | |
3306 | t.arg = wcb; | |
3307 | rfapiWithdrawTimerVPN(&t); /* frees wcb */ | |
65efcfce LB |
3308 | } |
3309 | ||
3310 | ||
d62a17ae | 3311 | /* |
9b6d8fcf | 3312 | * import a bgp_path_info if its route target list intersects with the |
65efcfce LB |
3313 | * import table's route target list |
3314 | */ | |
d62a17ae | 3315 | void rfapiBgpInfoFilteredImportVPN( |
3316 | struct rfapi_import_table *import_table, int action, struct peer *peer, | |
3317 | void *rfd, /* set for looped back routes */ | |
5a1ae2c2 DS |
3318 | const struct prefix *p, |
3319 | const struct prefix *aux_prefix, /* AFI_L2VPN: optional IP */ | |
d62a17ae | 3320 | afi_t afi, struct prefix_rd *prd, |
9b6d8fcf | 3321 | struct attr *attr, /* part of bgp_path_info */ |
5a1ae2c2 | 3322 | uint8_t type, /* part of bgp_path_info */ |
9b6d8fcf DS |
3323 | uint8_t sub_type, /* part of bgp_path_info */ |
3324 | uint32_t *label) /* part of bgp_path_info */ | |
65efcfce | 3325 | { |
fe08ba7e DS |
3326 | struct agg_table *rt = NULL; |
3327 | struct agg_node *rn; | |
3328 | struct agg_node *n; | |
4b7e6066 | 3329 | struct bgp_path_info *info_new; |
40381db7 | 3330 | struct bgp_path_info *bpi; |
4b7e6066 | 3331 | struct bgp_path_info *next; |
d62a17ae | 3332 | char buf[BUFSIZ]; |
3333 | struct prefix vn_prefix; | |
3334 | struct prefix un_prefix; | |
3335 | int un_prefix_valid = 0; | |
fe08ba7e | 3336 | struct agg_node *ern; |
d62a17ae | 3337 | int replacing = 0; |
3338 | int original_had_routes = 0; | |
3339 | struct prefix original_nexthop; | |
3340 | const char *action_str = NULL; | |
3341 | int is_it_ce = 0; | |
3342 | ||
3343 | struct bgp *bgp; | |
3344 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
3345 | ||
3346 | switch (action) { | |
3347 | case FIF_ACTION_UPDATE: | |
3348 | action_str = "update"; | |
3349 | break; | |
3350 | case FIF_ACTION_WITHDRAW: | |
3351 | action_str = "withdraw"; | |
3352 | break; | |
3353 | case FIF_ACTION_KILL: | |
3354 | action_str = "kill"; | |
3355 | break; | |
3356 | default: | |
3357 | assert(0); | |
3358 | break; | |
3359 | } | |
3360 | ||
3361 | if (import_table == bgp->rfapi->it_ce) | |
3362 | is_it_ce = 1; | |
3363 | ||
3364 | vnc_zlog_debug_verbose("%s: entry: %s%s: prefix %s/%d: it %p, afi %s", | |
3365 | __func__, (is_it_ce ? "CE-IT " : ""), action_str, | |
3366 | rfapi_ntop(p->family, &p->u.prefix, buf, BUFSIZ), | |
3367 | p->prefixlen, import_table, afi2str(afi)); | |
3368 | ||
3369 | VNC_ITRCCK; | |
3370 | ||
3371 | /* | |
3372 | * Compare rt lists. If no intersection, don't import this route | |
3373 | * On a withdraw, peer and RD are sufficient to determine if | |
3374 | * we should act. | |
3375 | */ | |
3376 | if (action == FIF_ACTION_UPDATE) { | |
b53e67a3 | 3377 | if (!attr || !bgp_attr_get_ecommunity(attr)) { |
d62a17ae | 3378 | |
3379 | vnc_zlog_debug_verbose( | |
3380 | "%s: attr, extra, or ecommunity missing, not importing", | |
3381 | __func__); | |
3382 | return; | |
3383 | } | |
b53e67a3 DA |
3384 | if ((import_table != bgp->rfapi->it_ce) && |
3385 | !rfapiEcommunitiesIntersect( | |
3386 | import_table->rt_import_list, | |
3387 | bgp_attr_get_ecommunity(attr))) { | |
d62a17ae | 3388 | |
3389 | vnc_zlog_debug_verbose( | |
3390 | "%s: it=%p: no ecommunity intersection", | |
3391 | __func__, import_table); | |
3392 | return; | |
3393 | } | |
3394 | ||
3395 | memset(&vn_prefix, 0, | |
3396 | sizeof(vn_prefix)); /* keep valgrind happy */ | |
3397 | if (rfapiGetNexthop(attr, &vn_prefix)) { | |
3398 | /* missing nexthop address would be a bad, bad thing */ | |
3399 | vnc_zlog_debug_verbose("%s: missing nexthop", __func__); | |
3400 | return; | |
3401 | } | |
3402 | } | |
3403 | ||
3404 | /* | |
3405 | * Figure out which radix tree the route would go into | |
3406 | */ | |
3407 | switch (afi) { | |
3408 | case AFI_IP: | |
3409 | case AFI_IP6: | |
3410 | case AFI_L2VPN: | |
3411 | rt = import_table->imported_vpn[afi]; | |
3412 | break; | |
3413 | ||
58cf0823 DS |
3414 | case AFI_UNSPEC: |
3415 | case AFI_MAX: | |
450971aa | 3416 | flog_err(EC_LIB_DEVELOPMENT, "%s: bad afi %d", __func__, afi); |
d62a17ae | 3417 | return; |
3418 | } | |
3419 | ||
3420 | /* clear it */ | |
3421 | memset(&original_nexthop, 0, sizeof(original_nexthop)); | |
3422 | ||
3423 | /* | |
fe08ba7e | 3424 | * agg_node_lookup returns a node only if there is at least |
d62a17ae | 3425 | * one route attached. |
3426 | */ | |
fe08ba7e | 3427 | rn = agg_node_lookup(rt, p); |
d62a17ae | 3428 | |
3429 | vnc_zlog_debug_verbose("%s: rn=%p", __func__, rn); | |
3430 | ||
3431 | if (rn) { | |
3432 | ||
3433 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, 1); | |
fe08ba7e | 3434 | agg_unlock_node(rn); /* undo lock in agg_node_lookup */ |
d62a17ae | 3435 | |
3436 | if (rn->info) | |
3437 | original_had_routes = 1; | |
3438 | ||
3439 | if (VNC_DEBUG(VERBOSE)) { | |
3440 | vnc_zlog_debug_verbose("%s: showing IT node on entry", | |
3441 | __func__); | |
3442 | rfapiShowItNode(NULL, rn); /* debug */ | |
3443 | } | |
3444 | ||
3445 | /* | |
3446 | * Look for same route (will have same RD and peer) | |
3447 | */ | |
40381db7 | 3448 | bpi = rfapiItBiIndexSearch(rn, prd, peer, aux_prefix); |
d62a17ae | 3449 | |
40381db7 | 3450 | if (bpi) { |
d62a17ae | 3451 | |
3452 | /* | |
3453 | * This was an old test when we iterated over the | |
40381db7 | 3454 | * BPIs linearly. Since we're now looking up with |
d62a17ae | 3455 | * RD and peer, comparing types should not be |
3456 | * needed. Changed to assertion. | |
3457 | * | |
3458 | * Compare types. Doing so prevents a RFP-originated | |
3459 | * route from matching an imported route, for example. | |
3460 | */ | |
40381db7 | 3461 | if (VNC_DEBUG(VERBOSE) && bpi->type != type) |
3af8cb57 | 3462 | /* should be handled by RDs, but warn for now */ |
40381db7 DS |
3463 | zlog_warn("%s: type mismatch! (bpi=%d, arg=%d)", |
3464 | __func__, bpi->type, type); | |
d62a17ae | 3465 | |
40381db7 | 3466 | vnc_zlog_debug_verbose("%s: found matching bpi", |
d62a17ae | 3467 | __func__); |
3468 | ||
3469 | /* | |
3470 | * In the special CE table, withdrawals occur without | |
3471 | * holddown | |
3472 | */ | |
3473 | if (import_table == bgp->rfapi->it_ce) { | |
40381db7 | 3474 | vnc_direct_bgp_del_route_ce(bgp, rn, bpi); |
d62a17ae | 3475 | if (action == FIF_ACTION_WITHDRAW) |
3476 | action = FIF_ACTION_KILL; | |
3477 | } | |
3478 | ||
3479 | if (action == FIF_ACTION_WITHDRAW) { | |
3480 | ||
40381db7 DS |
3481 | int washolddown = CHECK_FLAG(bpi->flags, |
3482 | BGP_PATH_REMOVED); | |
d62a17ae | 3483 | |
3484 | vnc_zlog_debug_verbose( | |
26a3ffd6 DS |
3485 | "%s: withdrawing at prefix %pRN%s", |
3486 | __func__, rn, | |
d62a17ae | 3487 | (washolddown |
3488 | ? " (already being withdrawn)" | |
3489 | : "")); | |
3490 | ||
3491 | VNC_ITRCCK; | |
3492 | if (!washolddown) { | |
3493 | rfapiBiStartWithdrawTimer( | |
40381db7 | 3494 | import_table, rn, bpi, afi, |
d62a17ae | 3495 | SAFI_MPLS_VPN, |
3496 | rfapiWithdrawTimerVPN); | |
3497 | ||
3498 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 3499 | bpi, import_table, afi, -1); |
d62a17ae | 3500 | import_table->holddown_count[afi] += 1; |
3501 | } | |
3502 | VNC_ITRCCK; | |
3503 | } else { | |
3504 | vnc_zlog_debug_verbose( | |
26a3ffd6 | 3505 | "%s: %s at prefix %pRN", __func__, |
d62a17ae | 3506 | ((action == FIF_ACTION_KILL) |
3507 | ? "killing" | |
3508 | : "replacing"), | |
26a3ffd6 | 3509 | rn); |
d62a17ae | 3510 | |
3511 | /* | |
3512 | * If this route is waiting to be deleted | |
3513 | * because of | |
3514 | * a previous withdraw, we must cancel its | |
3515 | * timer. | |
3516 | */ | |
40381db7 DS |
3517 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
3518 | && bpi->extra->vnc.import.timer) { | |
c3aaa89a DS |
3519 | struct rfapi_withdraw *wcb = THREAD_ARG( |
3520 | bpi->extra->vnc.import.timer); | |
d62a17ae | 3521 | |
3522 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
c3aaa89a DS |
3523 | THREAD_OFF( |
3524 | bpi->extra->vnc.import.timer); | |
d62a17ae | 3525 | |
3526 | import_table->holddown_count[afi] -= 1; | |
3527 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 3528 | bpi, import_table, afi, 1); |
d62a17ae | 3529 | } |
3530 | /* | |
3531 | * decrement remote count (if route is remote) | |
3532 | * because | |
3533 | * we are going to remove it below | |
3534 | */ | |
40381db7 DS |
3535 | RFAPI_UPDATE_ITABLE_COUNT(bpi, import_table, |
3536 | afi, -1); | |
d62a17ae | 3537 | if (action == FIF_ACTION_UPDATE) { |
3538 | replacing = 1; | |
3539 | ||
3540 | /* | |
3541 | * make copy of original nexthop so we | |
3542 | * can see if it changed | |
3543 | */ | |
40381db7 | 3544 | rfapiGetNexthop(bpi->attr, |
d62a17ae | 3545 | &original_nexthop); |
3546 | ||
3547 | /* | |
40381db7 | 3548 | * remove bpi without doing any export |
d62a17ae | 3549 | * processing |
3550 | */ | |
40381db7 | 3551 | if (CHECK_FLAG(bpi->flags, |
1defdda8 | 3552 | BGP_PATH_VALID) |
40381db7 | 3553 | && VALID_INTERIOR_TYPE(bpi->type)) |
d62a17ae | 3554 | RFAPI_MONITOR_EXTERIOR(rn) |
3555 | ->valid_interior_count--; | |
40381db7 DS |
3556 | rfapiItBiIndexDel(rn, bpi); |
3557 | rfapiBgpInfoDetach(rn, bpi); | |
3558 | rfapiMonitorEncapDelete(bpi); | |
d62a17ae | 3559 | vnc_import_bgp_exterior_del_route_interior( |
40381db7 DS |
3560 | bgp, import_table, rn, bpi); |
3561 | rfapiBgpInfoFree(bpi); | |
d62a17ae | 3562 | } else { |
3563 | /* Kill */ | |
3564 | /* | |
40381db7 | 3565 | * remove bpi and do export processing |
d62a17ae | 3566 | */ |
3567 | import_table->holddown_count[afi] += 1; | |
40381db7 | 3568 | rfapiExpireVpnNow(import_table, rn, bpi, |
d62a17ae | 3569 | 0); |
3570 | } | |
3571 | } | |
3572 | } | |
3573 | } | |
3574 | ||
3575 | if (rn) | |
3576 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, replacing ? 1 : 0); | |
3577 | ||
3578 | if (action == FIF_ACTION_WITHDRAW || action == FIF_ACTION_KILL) { | |
3579 | VNC_ITRCCK; | |
3580 | return; | |
3581 | } | |
3582 | ||
3583 | info_new = | |
3584 | rfapiBgpInfoCreate(attr, peer, rfd, prd, type, sub_type, label); | |
3585 | ||
3586 | /* | |
3587 | * lookup un address in encap table | |
3588 | */ | |
fe08ba7e | 3589 | ern = agg_node_match(import_table->imported_encap[afi], &vn_prefix); |
d62a17ae | 3590 | if (ern) { |
3591 | rfapiCopyUnEncap2VPN(ern->info, info_new); | |
fe08ba7e | 3592 | agg_unlock_node(ern); /* undo lock in route_note_match */ |
d62a17ae | 3593 | } else { |
d62a17ae | 3594 | /* Not a big deal, just means VPN route got here first */ |
2dbe669b DA |
3595 | vnc_zlog_debug_verbose("%s: no encap route for vn addr %pFX", |
3596 | __func__, &vn_prefix); | |
c7ca5ccf | 3597 | info_new->extra->vnc.import.un_family = AF_UNSPEC; |
d62a17ae | 3598 | } |
3599 | ||
3600 | if (rn) { | |
3601 | if (!replacing) | |
fe08ba7e | 3602 | agg_lock_node(rn); |
d62a17ae | 3603 | } else { |
3604 | /* | |
3605 | * No need to increment reference count, so only "get" | |
3606 | * if the node is not there already | |
3607 | */ | |
fe08ba7e | 3608 | rn = agg_node_get(rt, p); |
d62a17ae | 3609 | } |
3610 | ||
3611 | /* | |
3612 | * For ethernet routes, if there is an accompanying IP address, | |
40381db7 | 3613 | * save it in the bpi |
d62a17ae | 3614 | */ |
3615 | if ((AFI_L2VPN == afi) && aux_prefix) { | |
3616 | ||
40381db7 DS |
3617 | vnc_zlog_debug_verbose("%s: setting BPI's aux_prefix", |
3618 | __func__); | |
d62a17ae | 3619 | info_new->extra->vnc.import.aux_prefix = *aux_prefix; |
3620 | } | |
3621 | ||
26a3ffd6 | 3622 | vnc_zlog_debug_verbose("%s: inserting bpi %p at prefix %pRN #%d", |
c10e14e9 DS |
3623 | __func__, info_new, rn, |
3624 | agg_node_get_lock_count(rn)); | |
d62a17ae | 3625 | |
3626 | rfapiBgpInfoAttachSorted(rn, info_new, afi, SAFI_MPLS_VPN); | |
3627 | rfapiItBiIndexAdd(rn, info_new); | |
3628 | if (!rfapiGetUnAddrOfVpnBi(info_new, NULL)) { | |
3629 | if (VALID_INTERIOR_TYPE(info_new->type)) | |
3630 | RFAPI_MONITOR_EXTERIOR(rn)->valid_interior_count++; | |
1defdda8 | 3631 | SET_FLAG(info_new->flags, BGP_PATH_VALID); |
d62a17ae | 3632 | } |
3633 | RFAPI_UPDATE_ITABLE_COUNT(info_new, import_table, afi, 1); | |
3634 | vnc_import_bgp_exterior_add_route_interior(bgp, import_table, rn, | |
3635 | info_new); | |
3636 | ||
3637 | if (import_table == bgp->rfapi->it_ce) | |
3638 | vnc_direct_bgp_add_route_ce(bgp, rn, info_new); | |
3639 | ||
3640 | if (VNC_DEBUG(VERBOSE)) { | |
3641 | vnc_zlog_debug_verbose("%s: showing IT node", __func__); | |
3642 | rfapiShowItNode(NULL, rn); /* debug */ | |
3643 | } | |
3644 | ||
3645 | rfapiMonitorEncapAdd(import_table, &vn_prefix, rn, info_new); | |
3646 | ||
3647 | if (!rfapiGetUnAddrOfVpnBi(info_new, &un_prefix)) { | |
3648 | ||
3649 | /* | |
3650 | * if we have a valid UN address (either via Encap route | |
3651 | * or via tunnel attribute), then we should attempt | |
3652 | * to move any monitors at less-specific nodes to this node | |
3653 | */ | |
3654 | rfapiMonitorMoveLonger(rn); | |
3655 | ||
3656 | un_prefix_valid = 1; | |
3657 | } | |
3658 | ||
3659 | /* | |
3660 | * 101129 Enhancement: if we add a route (implication: it is not | |
3661 | * in holddown), delete all other routes from this nve at this | |
3662 | * node that are in holddown, regardless of peer. | |
3663 | * | |
3664 | * Reasons it's OK to do that: | |
3665 | * | |
3666 | * - if the holddown route being deleted originally came from BGP VPN, | |
3667 | * it is already gone from BGP (implication of holddown), so there | |
3668 | * won't be any added inconsistency with the BGP RIB. | |
3669 | * | |
3670 | * - once a fresh route is added at a prefix, any routes in holddown | |
3671 | * at that prefix will not show up in RFP responses, so deleting | |
3672 | * the holddown routes won't affect the contents of responses. | |
3673 | * | |
3674 | * - lifetimes are supposed to be consistent, so there should not | |
3675 | * be a case where the fresh route has a shorter lifetime than | |
3676 | * the holddown route, so we don't expect the fresh route to | |
3677 | * disappear and complete its holddown time before the existing | |
3678 | * holddown routes time out. Therefore, we won't have a situation | |
3679 | * where we expect the existing holddown routes to be hidden and | |
3680 | * then to reappear sometime later (as holddown routes) in a | |
3681 | * RFP response. | |
3682 | * | |
3683 | * Among other things, this would enable us to skirt the problem | |
3684 | * of local holddown routes that refer to NVE descriptors that | |
3685 | * have already been closed (if the same NVE triggers a subsequent | |
3686 | * rfapi_open(), the new peer is different and doesn't match the | |
3687 | * peer of the holddown route, so the stale holddown route still | |
3688 | * hangs around until it times out instead of just being replaced | |
3689 | * by the fresh route). | |
3690 | */ | |
3691 | /* | |
40381db7 | 3692 | * We know that the new bpi will have been inserted before any routes |
d62a17ae | 3693 | * in holddown, so we can skip any that came before it |
3694 | */ | |
40381db7 | 3695 | for (bpi = info_new->next; bpi; bpi = next) { |
d62a17ae | 3696 | |
3697 | struct prefix pfx_vn; | |
3698 | struct prefix pfx_un; | |
3699 | int un_match = 0; | |
3700 | int remote_peer_match = 0; | |
3701 | ||
40381db7 | 3702 | next = bpi->next; |
d62a17ae | 3703 | |
3704 | /* | |
3705 | * Must be holddown | |
3706 | */ | |
40381db7 | 3707 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) |
d62a17ae | 3708 | continue; |
3709 | ||
3710 | /* | |
3711 | * Must match VN address (nexthop of VPN route) | |
3712 | */ | |
40381db7 | 3713 | if (rfapiGetNexthop(bpi->attr, &pfx_vn)) |
d62a17ae | 3714 | continue; |
3715 | if (!prefix_same(&pfx_vn, &vn_prefix)) | |
3716 | continue; | |
3717 | ||
3718 | if (un_prefix_valid && /* new route UN addr */ | |
40381db7 | 3719 | !rfapiGetUnAddrOfVpnBi(bpi, &pfx_un) |
d62a17ae | 3720 | && /* old route UN addr */ |
3721 | prefix_same(&pfx_un, &un_prefix)) { /* compare */ | |
3722 | un_match = 1; | |
3723 | } | |
40381db7 DS |
3724 | if (!RFAPI_LOCAL_BI(bpi) && !RFAPI_LOCAL_BI(info_new) |
3725 | && sockunion_same(&bpi->peer->su, &info_new->peer->su)) { | |
d62a17ae | 3726 | /* old & new are both remote, same peer */ |
3727 | remote_peer_match = 1; | |
3728 | } | |
3729 | ||
80c6a472 | 3730 | if (!un_match && !remote_peer_match) |
d62a17ae | 3731 | continue; |
3732 | ||
3733 | vnc_zlog_debug_verbose( | |
40381db7 | 3734 | "%s: removing holddown bpi matching NVE of new route", |
d62a17ae | 3735 | __func__); |
40381db7 | 3736 | if (bpi->extra->vnc.import.timer) { |
c3aaa89a DS |
3737 | struct rfapi_withdraw *wcb = |
3738 | THREAD_ARG(bpi->extra->vnc.import.timer); | |
d62a17ae | 3739 | |
3740 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
c3aaa89a | 3741 | THREAD_OFF(bpi->extra->vnc.import.timer); |
d62a17ae | 3742 | } |
40381db7 | 3743 | rfapiExpireVpnNow(import_table, rn, bpi, 0); |
d62a17ae | 3744 | } |
3745 | ||
3746 | if (!original_had_routes) { | |
3747 | /* | |
3748 | * We went from 0 usable routes to 1 usable route. Perform the | |
3749 | * "Adding a Route" export process. | |
3750 | */ | |
3751 | vnc_direct_bgp_add_prefix(bgp, import_table, rn); | |
3752 | vnc_zebra_add_prefix(bgp, import_table, rn); | |
3753 | } else { | |
3754 | /* | |
3755 | * Check for nexthop change event | |
3756 | * Note: the prefix_same() test below detects two situations: | |
3757 | * 1. route is replaced, new route has different nexthop | |
3758 | * 2. new route is added (original_nexthop is 0) | |
3759 | */ | |
3760 | struct prefix new_nexthop; | |
3761 | ||
3762 | rfapiGetNexthop(attr, &new_nexthop); | |
3763 | if (!prefix_same(&original_nexthop, &new_nexthop)) { | |
3764 | /* | |
3765 | * nexthop change event | |
3766 | * vnc_direct_bgp_add_prefix() will recompute VN addr | |
3767 | * ecommunity | |
3768 | */ | |
3769 | vnc_direct_bgp_add_prefix(bgp, import_table, rn); | |
3770 | } | |
3771 | } | |
3772 | ||
3773 | if (!(bgp->rfapi_cfg->flags & BGP_VNC_CONFIG_CALLBACK_DISABLE)) { | |
fe08ba7e | 3774 | for (n = rn; n; n = agg_node_parent(n)) { |
d62a17ae | 3775 | // rfapiDoRouteCallback(import_table, n, NULL); |
3776 | } | |
3777 | rfapiMonitorItNodeChanged(import_table, rn, NULL); | |
3778 | } | |
3779 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, 0); | |
3780 | VNC_ITRCCK; | |
65efcfce LB |
3781 | } |
3782 | ||
21cf6b21 VJ |
3783 | static void rfapiBgpInfoFilteredImportBadSafi( |
3784 | struct rfapi_import_table *import_table, int action, struct peer *peer, | |
3785 | void *rfd, /* set for looped back routes */ | |
5a1ae2c2 DS |
3786 | const struct prefix *p, |
3787 | const struct prefix *aux_prefix, /* AFI_L2VPN: optional IP */ | |
21cf6b21 | 3788 | afi_t afi, struct prefix_rd *prd, |
9b6d8fcf | 3789 | struct attr *attr, /* part of bgp_path_info */ |
5a1ae2c2 | 3790 | uint8_t type, /* part of bgp_path_info */ |
9b6d8fcf DS |
3791 | uint8_t sub_type, /* part of bgp_path_info */ |
3792 | uint32_t *label) /* part of bgp_path_info */ | |
21cf6b21 VJ |
3793 | { |
3794 | vnc_zlog_debug_verbose("%s: Error, bad safi", __func__); | |
3795 | } | |
3796 | ||
65efcfce | 3797 | static rfapi_bi_filtered_import_f * |
d62a17ae | 3798 | rfapiBgpInfoFilteredImportFunction(safi_t safi) |
65efcfce | 3799 | { |
d62a17ae | 3800 | switch (safi) { |
3801 | case SAFI_MPLS_VPN: | |
3802 | return rfapiBgpInfoFilteredImportVPN; | |
3803 | ||
3804 | case SAFI_ENCAP: | |
3805 | return rfapiBgpInfoFilteredImportEncap; | |
5c525538 | 3806 | |
58cf0823 DS |
3807 | case SAFI_UNSPEC: |
3808 | case SAFI_UNICAST: | |
3809 | case SAFI_MULTICAST: | |
3810 | case SAFI_EVPN: | |
3811 | case SAFI_LABELED_UNICAST: | |
3812 | case SAFI_FLOWSPEC: | |
3813 | case SAFI_MAX: | |
5c525538 | 3814 | /* not expected */ |
1c50c1c0 | 3815 | flog_err(EC_LIB_DEVELOPMENT, "%s: bad safi %d", __func__, safi); |
21cf6b21 | 3816 | return rfapiBgpInfoFilteredImportBadSafi; |
d62a17ae | 3817 | } |
58cf0823 DS |
3818 | |
3819 | assert(!"Reached end of function when we were not expecting to"); | |
65efcfce LB |
3820 | } |
3821 | ||
d62a17ae | 3822 | void rfapiProcessUpdate(struct peer *peer, |
3823 | void *rfd, /* set when looped from RFP/RFAPI */ | |
5a1ae2c2 | 3824 | const struct prefix *p, struct prefix_rd *prd, |
d7c0a89a QY |
3825 | struct attr *attr, afi_t afi, safi_t safi, uint8_t type, |
3826 | uint8_t sub_type, uint32_t *label) | |
65efcfce | 3827 | { |
d62a17ae | 3828 | struct bgp *bgp; |
3829 | struct rfapi *h; | |
3830 | struct rfapi_import_table *it; | |
3831 | int has_ip_route = 1; | |
3832 | uint32_t lni = 0; | |
3833 | ||
3834 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
3835 | assert(bgp); | |
3836 | ||
3837 | h = bgp->rfapi; | |
3838 | assert(h); | |
3839 | ||
3840 | /* | |
3841 | * look at high-order byte of RD. FF means MAC | |
3842 | * address is present (VNC L2VPN) | |
3843 | */ | |
3844 | if ((safi == SAFI_MPLS_VPN) | |
3845 | && (decode_rd_type(prd->val) == RD_TYPE_VNC_ETH)) { | |
3846 | struct prefix pfx_mac_buf; | |
3847 | struct prefix pfx_nexthop_buf; | |
3848 | int rc; | |
3849 | ||
3850 | /* | |
3851 | * Set flag if prefix and nexthop are the same - don't | |
3852 | * add the route to normal IP-based import tables | |
3853 | */ | |
3854 | if (!rfapiGetNexthop(attr, &pfx_nexthop_buf)) { | |
3855 | if (!prefix_cmp(&pfx_nexthop_buf, p)) { | |
3856 | has_ip_route = 0; | |
3857 | } | |
3858 | } | |
3859 | ||
3860 | memset(&pfx_mac_buf, 0, sizeof(pfx_mac_buf)); | |
3861 | pfx_mac_buf.family = AF_ETHERNET; | |
3862 | pfx_mac_buf.prefixlen = 48; | |
3863 | memcpy(&pfx_mac_buf.u.prefix_eth.octet, prd->val + 2, 6); | |
3864 | ||
3865 | /* | |
3866 | * Find rt containing LNI (Logical Network ID), which | |
3867 | * _should_ always be present when mac address is present | |
3868 | */ | |
b53e67a3 | 3869 | rc = rfapiEcommunityGetLNI(bgp_attr_get_ecommunity(attr), &lni); |
d62a17ae | 3870 | |
3871 | vnc_zlog_debug_verbose( | |
3872 | "%s: rfapiEcommunityGetLNI returned %d, lni=%d, attr=%p", | |
3873 | __func__, rc, lni, attr); | |
8cea9547 | 3874 | if (!rc) { |
d62a17ae | 3875 | it = rfapiMacImportTableGet(bgp, lni); |
3876 | ||
3877 | rfapiBgpInfoFilteredImportVPN( | |
3878 | it, FIF_ACTION_UPDATE, peer, rfd, | |
3879 | &pfx_mac_buf, /* prefix */ | |
3880 | p, /* aux prefix: IP addr */ | |
3881 | AFI_L2VPN, prd, attr, type, sub_type, label); | |
3882 | } | |
3883 | } | |
3884 | ||
3885 | if (!has_ip_route) | |
3886 | return; | |
3887 | ||
3888 | /* | |
3889 | * Iterate over all import tables; do a filtered import | |
3890 | * for the afi/safi combination | |
3891 | */ | |
3892 | for (it = h->imports; it; it = it->next) { | |
3893 | (*rfapiBgpInfoFilteredImportFunction(safi))( | |
3894 | it, FIF_ACTION_UPDATE, peer, rfd, p, /* prefix */ | |
3895 | NULL, afi, prd, attr, type, sub_type, label); | |
3896 | } | |
3897 | ||
3898 | if (safi == SAFI_MPLS_VPN) { | |
3899 | vnc_direct_bgp_rh_add_route(bgp, afi, p, peer, attr); | |
d62a17ae | 3900 | rfapiBgpInfoFilteredImportVPN( |
3901 | bgp->rfapi->it_ce, FIF_ACTION_UPDATE, peer, rfd, | |
3902 | p, /* prefix */ | |
3903 | NULL, afi, prd, attr, type, sub_type, label); | |
3904 | } | |
65efcfce LB |
3905 | } |
3906 | ||
3907 | ||
5a1ae2c2 | 3908 | void rfapiProcessWithdraw(struct peer *peer, void *rfd, const struct prefix *p, |
d62a17ae | 3909 | struct prefix_rd *prd, struct attr *attr, afi_t afi, |
d7c0a89a | 3910 | safi_t safi, uint8_t type, int kill) |
65efcfce | 3911 | { |
d62a17ae | 3912 | struct bgp *bgp; |
3913 | struct rfapi *h; | |
3914 | struct rfapi_import_table *it; | |
3915 | ||
3916 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
3917 | assert(bgp); | |
3918 | ||
3919 | h = bgp->rfapi; | |
3920 | assert(h); | |
3921 | ||
3922 | /* | |
3923 | * look at high-order byte of RD. FF means MAC | |
3924 | * address is present (VNC L2VPN) | |
3925 | */ | |
3926 | if (h->import_mac != NULL && safi == SAFI_MPLS_VPN | |
3927 | && decode_rd_type(prd->val) == RD_TYPE_VNC_ETH) { | |
3928 | struct prefix pfx_mac_buf; | |
3929 | void *cursor = NULL; | |
3930 | int rc; | |
3931 | ||
3932 | memset(&pfx_mac_buf, 0, sizeof(pfx_mac_buf)); | |
3933 | pfx_mac_buf.family = AF_ETHERNET; | |
3934 | pfx_mac_buf.prefixlen = 48; | |
3935 | memcpy(&pfx_mac_buf.u.prefix_eth, prd->val + 2, 6); | |
3936 | ||
3937 | /* | |
3938 | * withdraw does not contain attrs, so we don't have | |
3939 | * access to the route's LNI, which would ordinarily | |
3940 | * select the specific mac-based import table. Instead, | |
3941 | * we must iterate over all mac-based tables and rely | |
3942 | * on the RD to match. | |
3943 | * | |
3944 | * If this approach is too slow, add an index where | |
3945 | * key is {RD, peer} and value is the import table | |
3946 | */ | |
3947 | for (rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
3948 | &cursor); | |
3949 | rc == 0; rc = skiplist_next(h->import_mac, NULL, | |
3950 | (void **)&it, &cursor)) { | |
65efcfce | 3951 | |
1e20238a | 3952 | #ifdef DEBUG_L2_EXTRA |
d62a17ae | 3953 | vnc_zlog_debug_verbose( |
3954 | "%s: calling rfapiBgpInfoFilteredImportVPN(it=%p, afi=AFI_L2VPN)", | |
3955 | __func__, it); | |
65efcfce LB |
3956 | #endif |
3957 | ||
d62a17ae | 3958 | rfapiBgpInfoFilteredImportVPN( |
3959 | it, | |
3960 | (kill ? FIF_ACTION_KILL : FIF_ACTION_WITHDRAW), | |
3961 | peer, rfd, &pfx_mac_buf, /* prefix */ | |
3962 | p, /* aux_prefix: IP */ | |
3963 | AFI_L2VPN, prd, attr, type, 0, | |
3964 | NULL); /* sub_type & label unused for withdraw | |
9d303b37 | 3965 | */ |
d62a17ae | 3966 | } |
3967 | } | |
3968 | ||
3969 | /* | |
3970 | * XXX For the case where the withdraw involves an L2 | |
3971 | * route with no IP information, we rely on the lack | |
3972 | * of RT-list intersection to filter out the withdraw | |
3973 | * from the IP-based import tables below | |
3974 | */ | |
3975 | ||
3976 | /* | |
3977 | * Iterate over all import tables; do a filtered import | |
3978 | * for the afi/safi combination | |
3979 | */ | |
3980 | ||
3981 | for (it = h->imports; it; it = it->next) { | |
3982 | (*rfapiBgpInfoFilteredImportFunction(safi))( | |
3983 | it, (kill ? FIF_ACTION_KILL : FIF_ACTION_WITHDRAW), | |
3984 | peer, rfd, p, /* prefix */ | |
3985 | NULL, afi, prd, attr, type, 0, | |
3986 | NULL); /* sub_type & label unused for withdraw */ | |
3987 | } | |
3988 | ||
3989 | /* TBD the deletion should happen after the lifetime expires */ | |
3990 | if (safi == SAFI_MPLS_VPN) | |
3991 | vnc_direct_bgp_rh_del_route(bgp, afi, p, peer); | |
3992 | ||
3993 | if (safi == SAFI_MPLS_VPN) { | |
3994 | rfapiBgpInfoFilteredImportVPN( | |
3995 | bgp->rfapi->it_ce, | |
3996 | (kill ? FIF_ACTION_KILL : FIF_ACTION_WITHDRAW), peer, | |
3997 | rfd, p, /* prefix */ | |
3998 | NULL, afi, prd, attr, type, 0, | |
3999 | NULL); /* sub_type & label unused for withdraw */ | |
4000 | } | |
65efcfce LB |
4001 | } |
4002 | ||
4003 | /* | |
4004 | * TBD optimized withdraw timer algorithm for case of many | |
4005 | * routes expiring at the same time due to peer drop. | |
4006 | */ | |
4007 | /* | |
40381db7 | 4008 | * 1. Visit all BPIs in all ENCAP import tables. |
65efcfce | 4009 | * |
40381db7 DS |
4010 | * a. If a bpi's peer is the failed peer, remove the bpi. |
4011 | * b. If the removed ENCAP bpi was first in the list of | |
4012 | * BPIs at this ENCAP node, loop over all monitors | |
65efcfce LB |
4013 | * at this node: |
4014 | * | |
4015 | * (1) for each ENCAP monitor, loop over all its | |
4016 | * VPN node monitors and set their RFAPI_MON_FLAG_NEEDCALLBACK | |
4017 | * flags. | |
4018 | * | |
40381db7 DS |
4019 | * 2. Visit all BPIs in all VPN import tables. |
4020 | * a. If a bpi's peer is the failed peer, remove the bpi. | |
65efcfce LB |
4021 | * b. loop over all the VPN node monitors and set their |
4022 | * RFAPI_MON_FLAG_NEEDCALLBACK flags | |
40381db7 | 4023 | * c. If there are no BPIs left at this VPN node, |
65efcfce LB |
4024 | * |
4025 | */ | |
4026 | ||
4027 | ||
4028 | /* surprise, this gets called from peer_delete(), from rfapi_close() */ | |
d62a17ae | 4029 | static void rfapiProcessPeerDownRt(struct peer *peer, |
4030 | struct rfapi_import_table *import_table, | |
4031 | afi_t afi, safi_t safi) | |
65efcfce | 4032 | { |
fe08ba7e | 4033 | struct agg_node *rn; |
40381db7 | 4034 | struct bgp_path_info *bpi; |
58cf0823 DS |
4035 | struct agg_table *rt = NULL; |
4036 | void (*timer_service_func)(struct thread *) = NULL; | |
d62a17ae | 4037 | |
4038 | assert(afi == AFI_IP || afi == AFI_IP6); | |
4039 | ||
4040 | VNC_ITRCCK; | |
4041 | ||
4042 | switch (safi) { | |
4043 | case SAFI_MPLS_VPN: | |
4044 | rt = import_table->imported_vpn[afi]; | |
4045 | timer_service_func = rfapiWithdrawTimerVPN; | |
4046 | break; | |
4047 | case SAFI_ENCAP: | |
4048 | rt = import_table->imported_encap[afi]; | |
4049 | timer_service_func = rfapiWithdrawTimerEncap; | |
4050 | break; | |
58cf0823 DS |
4051 | case SAFI_UNSPEC: |
4052 | case SAFI_UNICAST: | |
4053 | case SAFI_MULTICAST: | |
4054 | case SAFI_EVPN: | |
4055 | case SAFI_LABELED_UNICAST: | |
4056 | case SAFI_FLOWSPEC: | |
4057 | case SAFI_MAX: | |
21fe4510 QY |
4058 | /* Suppress uninitialized variable warning */ |
4059 | rt = NULL; | |
4060 | timer_service_func = NULL; | |
d62a17ae | 4061 | assert(0); |
4062 | } | |
4063 | ||
fe08ba7e | 4064 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
40381db7 DS |
4065 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
4066 | if (bpi->peer == peer) { | |
d62a17ae | 4067 | |
40381db7 | 4068 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
d62a17ae | 4069 | /* already in holddown, skip */ |
4070 | continue; | |
4071 | } | |
4072 | ||
4073 | if (safi == SAFI_MPLS_VPN) { | |
4074 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 4075 | bpi, import_table, afi, -1); |
d62a17ae | 4076 | import_table->holddown_count[afi] += 1; |
4077 | } | |
40381db7 | 4078 | rfapiBiStartWithdrawTimer(import_table, rn, bpi, |
d62a17ae | 4079 | afi, safi, |
4080 | timer_service_func); | |
4081 | } | |
4082 | } | |
4083 | } | |
4084 | VNC_ITRCCK; | |
65efcfce LB |
4085 | } |
4086 | ||
d62a17ae | 4087 | /* |
65efcfce LB |
4088 | * This gets called when a peer connection drops. We have to remove |
4089 | * all the routes from this peer. | |
4090 | * | |
4091 | * Current approach is crude. TBD Optimize by setting fewer timers and | |
4092 | * grouping withdrawn routes so we can generate callbacks more | |
4093 | * efficiently. | |
4094 | */ | |
d62a17ae | 4095 | void rfapiProcessPeerDown(struct peer *peer) |
65efcfce | 4096 | { |
d62a17ae | 4097 | struct bgp *bgp; |
4098 | struct rfapi *h; | |
4099 | struct rfapi_import_table *it; | |
4100 | ||
4101 | /* | |
4102 | * If this peer is a "dummy" peer structure atached to a RFAPI | |
4103 | * nve_descriptor, we don't need to walk the import tables | |
4104 | * because the routes are already withdrawn by rfapi_close() | |
4105 | */ | |
4106 | if (CHECK_FLAG(peer->flags, PEER_FLAG_IS_RFAPI_HD)) | |
4107 | return; | |
4108 | ||
4109 | /* | |
40381db7 DS |
4110 | * 1. Visit all BPIs in all ENCAP import tables. |
4111 | * Start withdraw timer on the BPIs that match peer. | |
d62a17ae | 4112 | * |
40381db7 DS |
4113 | * 2. Visit All BPIs in all VPN import tables. |
4114 | * Start withdraw timer on the BPIs that match peer. | |
d62a17ae | 4115 | */ |
4116 | ||
4117 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
4118 | if (!bgp) | |
4119 | return; | |
4120 | ||
4121 | h = bgp->rfapi; | |
4122 | assert(h); | |
4123 | ||
4124 | for (it = h->imports; it; it = it->next) { | |
4125 | rfapiProcessPeerDownRt(peer, it, AFI_IP, SAFI_ENCAP); | |
4126 | rfapiProcessPeerDownRt(peer, it, AFI_IP6, SAFI_ENCAP); | |
4127 | rfapiProcessPeerDownRt(peer, it, AFI_IP, SAFI_MPLS_VPN); | |
4128 | rfapiProcessPeerDownRt(peer, it, AFI_IP6, SAFI_MPLS_VPN); | |
4129 | } | |
4130 | ||
4131 | if (h->it_ce) { | |
4132 | rfapiProcessPeerDownRt(peer, h->it_ce, AFI_IP, SAFI_MPLS_VPN); | |
4133 | rfapiProcessPeerDownRt(peer, h->it_ce, AFI_IP6, SAFI_MPLS_VPN); | |
4134 | } | |
65efcfce LB |
4135 | } |
4136 | ||
4137 | /* | |
4138 | * Import an entire RIB (for an afi/safi) to an import table RIB, | |
4139 | * filtered according to the import table's RT list | |
4140 | * | |
4141 | * TBD: does this function need additions to match rfapiProcessUpdate() | |
d62a17ae | 4142 | * for, e.g., L2 handling? |
65efcfce | 4143 | */ |
d62a17ae | 4144 | static void rfapiBgpTableFilteredImport(struct bgp *bgp, |
4145 | struct rfapi_import_table *it, | |
4146 | afi_t afi, safi_t safi) | |
65efcfce | 4147 | { |
9bcb3eef DS |
4148 | struct bgp_dest *dest1; |
4149 | struct bgp_dest *dest2; | |
d62a17ae | 4150 | |
4151 | /* Only these SAFIs have 2-level RIBS */ | |
4152 | assert(safi == SAFI_MPLS_VPN || safi == SAFI_ENCAP); | |
4153 | ||
4154 | /* | |
4155 | * Now visit all the rd nodes and the nodes of all the | |
4156 | * route tables attached to them, and import the routes | |
4157 | * if they have matching route targets | |
4158 | */ | |
9bcb3eef DS |
4159 | for (dest1 = bgp_table_top(bgp->rib[afi][safi]); dest1; |
4160 | dest1 = bgp_route_next(dest1)) { | |
d62a17ae | 4161 | |
9bcb3eef | 4162 | if (bgp_dest_has_bgp_path_info_data(dest1)) { |
6f94b685 | 4163 | |
9bcb3eef DS |
4164 | for (dest2 = bgp_table_top( |
4165 | bgp_dest_get_bgp_table_info(dest1)); | |
4166 | dest2; dest2 = bgp_route_next(dest2)) { | |
d62a17ae | 4167 | |
40381db7 | 4168 | struct bgp_path_info *bpi; |
d62a17ae | 4169 | |
9bcb3eef | 4170 | for (bpi = bgp_dest_get_bgp_path_info(dest2); |
6f94b685 | 4171 | bpi; bpi = bpi->next) { |
d7c0a89a | 4172 | uint32_t label = 0; |
d62a17ae | 4173 | |
40381db7 | 4174 | if (CHECK_FLAG(bpi->flags, |
1defdda8 | 4175 | BGP_PATH_REMOVED)) |
d62a17ae | 4176 | continue; |
4177 | ||
40381db7 | 4178 | if (bpi->extra) |
d62a17ae | 4179 | label = decode_label( |
40381db7 | 4180 | &bpi->extra->label[0]); |
d62a17ae | 4181 | (*rfapiBgpInfoFilteredImportFunction( |
4182 | safi))( | |
4183 | it, /* which import table */ | |
40381db7 | 4184 | FIF_ACTION_UPDATE, bpi->peer, |
9bcb3eef DS |
4185 | NULL, |
4186 | bgp_dest_get_prefix(dest2), | |
d62a17ae | 4187 | NULL, afi, |
b54892e0 | 4188 | (struct prefix_rd *) |
9bcb3eef DS |
4189 | bgp_dest_get_prefix( |
4190 | dest1), | |
40381db7 DS |
4191 | bpi->attr, bpi->type, |
4192 | bpi->sub_type, &label); | |
d62a17ae | 4193 | } |
4194 | } | |
4195 | } | |
4196 | } | |
65efcfce LB |
4197 | } |
4198 | ||
4199 | ||
4200 | /* per-bgp-instance rfapi data */ | |
d62a17ae | 4201 | struct rfapi *bgp_rfapi_new(struct bgp *bgp) |
65efcfce | 4202 | { |
d62a17ae | 4203 | struct rfapi *h; |
e7038dde | 4204 | afi_t afi; |
d62a17ae | 4205 | struct rfapi_rfp_cfg *cfg = NULL; |
4206 | struct rfapi_rfp_cb_methods *cbm = NULL; | |
4207 | ||
4208 | assert(bgp->rfapi_cfg == NULL); | |
4209 | ||
9f5dc319 | 4210 | h = XCALLOC(MTYPE_RFAPI, sizeof(struct rfapi)); |
d62a17ae | 4211 | |
4212 | for (afi = AFI_IP; afi < AFI_MAX; afi++) { | |
fe08ba7e | 4213 | h->un[afi] = agg_table_init(); |
d62a17ae | 4214 | } |
4215 | ||
4216 | /* | |
4217 | * initialize the ce import table | |
4218 | */ | |
4219 | h->it_ce = XCALLOC(MTYPE_RFAPI_IMPORTTABLE, | |
4220 | sizeof(struct rfapi_import_table)); | |
fe08ba7e DS |
4221 | h->it_ce->imported_vpn[AFI_IP] = agg_table_init(); |
4222 | h->it_ce->imported_vpn[AFI_IP6] = agg_table_init(); | |
4223 | h->it_ce->imported_encap[AFI_IP] = agg_table_init(); | |
4224 | h->it_ce->imported_encap[AFI_IP6] = agg_table_init(); | |
d62a17ae | 4225 | rfapiBgpTableFilteredImport(bgp, h->it_ce, AFI_IP, SAFI_MPLS_VPN); |
4226 | rfapiBgpTableFilteredImport(bgp, h->it_ce, AFI_IP6, SAFI_MPLS_VPN); | |
4227 | ||
4228 | /* | |
4229 | * Set up work queue for deferred rfapi_close operations | |
4230 | */ | |
4231 | h->deferred_close_q = | |
4232 | work_queue_new(bm->master, "rfapi deferred close"); | |
4233 | h->deferred_close_q->spec.workfunc = rfapi_deferred_close_workfunc; | |
4234 | h->deferred_close_q->spec.data = h; | |
4235 | ||
4236 | h->rfp = rfp_start(bm->master, &cfg, &cbm); | |
4237 | bgp->rfapi_cfg = bgp_rfapi_cfg_new(cfg); | |
4238 | if (cbm != NULL) { | |
4239 | h->rfp_methods = *cbm; | |
4240 | } | |
4241 | return h; | |
65efcfce LB |
4242 | } |
4243 | ||
d62a17ae | 4244 | void bgp_rfapi_destroy(struct bgp *bgp, struct rfapi *h) |
65efcfce | 4245 | { |
e7038dde | 4246 | afi_t afi; |
0ae6124f | 4247 | |
d62a17ae | 4248 | if (bgp == NULL || h == NULL) |
4249 | return; | |
4250 | ||
4251 | if (h->resolve_nve_nexthop) { | |
4252 | skiplist_free(h->resolve_nve_nexthop); | |
4253 | h->resolve_nve_nexthop = NULL; | |
4254 | } | |
4255 | ||
fe08ba7e DS |
4256 | agg_table_finish(h->it_ce->imported_vpn[AFI_IP]); |
4257 | agg_table_finish(h->it_ce->imported_vpn[AFI_IP6]); | |
4258 | agg_table_finish(h->it_ce->imported_encap[AFI_IP]); | |
4259 | agg_table_finish(h->it_ce->imported_encap[AFI_IP6]); | |
d62a17ae | 4260 | |
4261 | if (h->import_mac) { | |
4262 | struct rfapi_import_table *it; | |
4263 | void *cursor; | |
4264 | int rc; | |
4265 | ||
9d303b37 DL |
4266 | for (cursor = NULL, |
4267 | rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4268 | &cursor); | |
d62a17ae | 4269 | !rc; rc = skiplist_next(h->import_mac, NULL, (void **)&it, |
4270 | &cursor)) { | |
4271 | ||
4272 | rfapiImportTableFlush(it); | |
4273 | XFREE(MTYPE_RFAPI_IMPORTTABLE, it); | |
4274 | } | |
4275 | skiplist_free(h->import_mac); | |
4276 | h->import_mac = NULL; | |
4277 | } | |
4278 | ||
e208c8f9 | 4279 | work_queue_free_and_null(&h->deferred_close_q); |
d62a17ae | 4280 | |
4281 | if (h->rfp != NULL) | |
4282 | rfp_stop(h->rfp); | |
0ae6124f LB |
4283 | |
4284 | for (afi = AFI_IP; afi < AFI_MAX; afi++) { | |
fe08ba7e | 4285 | agg_table_finish(h->un[afi]); |
0ae6124f LB |
4286 | } |
4287 | ||
d62a17ae | 4288 | XFREE(MTYPE_RFAPI_IMPORTTABLE, h->it_ce); |
4289 | XFREE(MTYPE_RFAPI, h); | |
65efcfce LB |
4290 | } |
4291 | ||
4292 | struct rfapi_import_table * | |
d62a17ae | 4293 | rfapiImportTableRefAdd(struct bgp *bgp, struct ecommunity *rt_import_list, |
4294 | struct rfapi_nve_group_cfg *rfg) | |
65efcfce | 4295 | { |
d62a17ae | 4296 | struct rfapi *h; |
4297 | struct rfapi_import_table *it; | |
4298 | afi_t afi; | |
4299 | ||
4300 | h = bgp->rfapi; | |
4301 | assert(h); | |
4302 | ||
4303 | for (it = h->imports; it; it = it->next) { | |
4304 | if (ecommunity_cmp(it->rt_import_list, rt_import_list)) | |
4305 | break; | |
4306 | } | |
4307 | ||
4308 | vnc_zlog_debug_verbose("%s: matched it=%p", __func__, it); | |
4309 | ||
4310 | if (!it) { | |
4311 | it = XCALLOC(MTYPE_RFAPI_IMPORTTABLE, | |
4312 | sizeof(struct rfapi_import_table)); | |
d62a17ae | 4313 | it->next = h->imports; |
4314 | h->imports = it; | |
4315 | ||
4316 | it->rt_import_list = ecommunity_dup(rt_import_list); | |
4317 | it->rfg = rfg; | |
4318 | it->monitor_exterior_orphans = | |
63265b5c | 4319 | skiplist_new(0, NULL, prefix_free_lists); |
d62a17ae | 4320 | |
4321 | /* | |
4322 | * fill import route tables from RIBs | |
4323 | * | |
4324 | * Potential area for optimization. If this occurs when | |
4325 | * tables are large (e.g., the operator adds a nve group | |
4326 | * with a new RT list to a running system), it could take | |
4327 | * a while. | |
4328 | * | |
4329 | */ | |
4330 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
4331 | ||
fe08ba7e DS |
4332 | it->imported_vpn[afi] = agg_table_init(); |
4333 | it->imported_encap[afi] = agg_table_init(); | |
d62a17ae | 4334 | |
4335 | rfapiBgpTableFilteredImport(bgp, it, afi, | |
4336 | SAFI_MPLS_VPN); | |
4337 | rfapiBgpTableFilteredImport(bgp, it, afi, SAFI_ENCAP); | |
4338 | ||
4339 | vnc_import_bgp_exterior_redist_enable_it(bgp, afi, it); | |
4340 | } | |
4341 | } | |
4342 | ||
4343 | it->refcount += 1; | |
4344 | ||
4345 | return it; | |
65efcfce LB |
4346 | } |
4347 | ||
4348 | /* | |
4349 | * skiplist element free function | |
4350 | */ | |
d62a17ae | 4351 | static void delete_rem_pfx_na_free(void *na) |
65efcfce | 4352 | { |
d62a17ae | 4353 | uint32_t *pCounter = ((struct rfapi_nve_addr *)na)->info; |
65efcfce | 4354 | |
d62a17ae | 4355 | *pCounter += 1; |
4356 | XFREE(MTYPE_RFAPI_NVE_ADDR, na); | |
65efcfce LB |
4357 | } |
4358 | ||
4359 | /* | |
4360 | * Common deleter for IP and MAC import tables | |
4361 | */ | |
d62a17ae | 4362 | static void rfapiDeleteRemotePrefixesIt( |
4363 | struct bgp *bgp, struct rfapi_import_table *it, struct prefix *un, | |
4364 | struct prefix *vn, struct prefix *p, int delete_active, | |
4365 | int delete_holddown, uint32_t *pARcount, uint32_t *pAHcount, | |
4366 | uint32_t *pHRcount, uint32_t *pHHcount, | |
4367 | struct skiplist *uniq_active_nves, struct skiplist *uniq_holddown_nves) | |
65efcfce | 4368 | { |
d62a17ae | 4369 | afi_t afi; |
65efcfce | 4370 | |
1e20238a | 4371 | #ifdef DEBUG_L2_EXTRA |
d62a17ae | 4372 | { |
872ed4c7 | 4373 | char buf_pfx[PREFIX_STRLEN]; |
d62a17ae | 4374 | |
4375 | if (p) { | |
872ed4c7 | 4376 | prefix2str(p, buf_pfx, sizeof(buf_pfx)); |
d62a17ae | 4377 | } else { |
4378 | buf_pfx[0] = '*'; | |
4379 | buf_pfx[1] = 0; | |
4380 | } | |
4381 | ||
4382 | vnc_zlog_debug_verbose( | |
4383 | "%s: entry, p=%s, delete_active=%d, delete_holddown=%d", | |
4384 | __func__, buf_pfx, delete_active, delete_holddown); | |
4385 | } | |
65efcfce LB |
4386 | #endif |
4387 | ||
d62a17ae | 4388 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { |
4389 | ||
fe08ba7e DS |
4390 | struct agg_table *rt; |
4391 | struct agg_node *rn; | |
d62a17ae | 4392 | |
4393 | if (p && (family2afi(p->family) != afi)) { | |
4394 | continue; | |
4395 | } | |
4396 | ||
4397 | rt = it->imported_vpn[afi]; | |
4398 | if (!rt) | |
4399 | continue; | |
4400 | ||
4401 | vnc_zlog_debug_verbose("%s: scanning rt for afi=%d", __func__, | |
4402 | afi); | |
4403 | ||
fe08ba7e | 4404 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
40381db7 | 4405 | struct bgp_path_info *bpi; |
4b7e6066 | 4406 | struct bgp_path_info *next; |
26a3ffd6 | 4407 | const struct prefix *rn_p = agg_node_get_prefix(rn); |
d62a17ae | 4408 | |
2dbe669b DA |
4409 | if (p && VNC_DEBUG(IMPORT_DEL_REMOTE)) |
4410 | vnc_zlog_debug_any("%s: want %pFX, have %pRN", | |
4411 | __func__, p, rn); | |
d62a17ae | 4412 | |
26a3ffd6 | 4413 | if (p && prefix_cmp(p, rn_p)) |
d62a17ae | 4414 | continue; |
4415 | ||
26a3ffd6 | 4416 | vnc_zlog_debug_verbose("%s: rn pfx=%pRN", __func__, rn); |
d62a17ae | 4417 | |
4418 | /* TBD is this valid for afi == AFI_L2VPN? */ | |
4419 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, 1); | |
4420 | ||
40381db7 DS |
4421 | for (bpi = rn->info; bpi; bpi = next) { |
4422 | next = bpi->next; | |
d62a17ae | 4423 | |
4424 | struct prefix qpt; | |
4425 | struct prefix qct; | |
4426 | int qpt_valid = 0; | |
4427 | int qct_valid = 0; | |
4428 | int is_active = 0; | |
4429 | ||
40381db7 DS |
4430 | vnc_zlog_debug_verbose("%s: examining bpi %p", |
4431 | __func__, bpi); | |
d62a17ae | 4432 | |
05864da7 DS |
4433 | if (!rfapiGetNexthop(bpi->attr, &qpt)) |
4434 | qpt_valid = 1; | |
4435 | ||
d62a17ae | 4436 | if (vn) { |
4437 | if (!qpt_valid | |
4438 | || !prefix_match(vn, &qpt)) { | |
1e20238a | 4439 | #ifdef DEBUG_L2_EXTRA |
d62a17ae | 4440 | vnc_zlog_debug_verbose( |
4441 | "%s: continue at vn && !qpt_valid || !prefix_match(vn, &qpt)", | |
4442 | __func__); | |
65efcfce | 4443 | #endif |
d62a17ae | 4444 | continue; |
4445 | } | |
4446 | } | |
65efcfce | 4447 | |
40381db7 | 4448 | if (!rfapiGetUnAddrOfVpnBi(bpi, &qct)) |
d62a17ae | 4449 | qct_valid = 1; |
65efcfce | 4450 | |
d62a17ae | 4451 | if (un) { |
4452 | if (!qct_valid | |
4453 | || !prefix_match(un, &qct)) { | |
1e20238a | 4454 | #ifdef DEBUG_L2_EXTRA |
d62a17ae | 4455 | vnc_zlog_debug_verbose( |
4456 | "%s: continue at un && !qct_valid || !prefix_match(un, &qct)", | |
4457 | __func__); | |
65efcfce | 4458 | #endif |
d62a17ae | 4459 | continue; |
4460 | } | |
4461 | } | |
4462 | ||
4463 | ||
4464 | /* | |
40381db7 | 4465 | * Blow bpi away |
d62a17ae | 4466 | */ |
4467 | /* | |
4468 | * If this route is waiting to be deleted | |
4469 | * because of | |
4470 | * a previous withdraw, we must cancel its | |
4471 | * timer. | |
4472 | */ | |
40381db7 | 4473 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
d62a17ae | 4474 | if (!delete_holddown) |
4475 | continue; | |
40381db7 | 4476 | if (bpi->extra->vnc.import.timer) { |
d62a17ae | 4477 | struct rfapi_withdraw *wcb = |
c3aaa89a DS |
4478 | THREAD_ARG( |
4479 | bpi->extra->vnc | |
4480 | .import | |
4481 | .timer); | |
d62a17ae | 4482 | |
4483 | wcb->import_table | |
4484 | ->holddown_count[afi] -= | |
4485 | 1; | |
4486 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 4487 | bpi, wcb->import_table, |
d62a17ae | 4488 | afi, 1); |
4489 | XFREE(MTYPE_RFAPI_WITHDRAW, | |
4490 | wcb); | |
c3aaa89a DS |
4491 | THREAD_OFF( |
4492 | bpi->extra->vnc.import | |
4493 | .timer); | |
d62a17ae | 4494 | } |
4495 | } else { | |
4496 | if (!delete_active) | |
4497 | continue; | |
4498 | is_active = 1; | |
4499 | } | |
4500 | ||
4501 | vnc_zlog_debug_verbose( | |
40381db7 DS |
4502 | "%s: deleting bpi %p (qct_valid=%d, qpt_valid=%d, delete_holddown=%d, delete_active=%d)", |
4503 | __func__, bpi, qct_valid, qpt_valid, | |
d62a17ae | 4504 | delete_holddown, delete_active); |
4505 | ||
4506 | ||
4507 | /* | |
4508 | * add nve to list | |
4509 | */ | |
4510 | if (qct_valid && qpt_valid) { | |
4511 | ||
4512 | struct rfapi_nve_addr na; | |
4513 | struct rfapi_nve_addr *nap; | |
4514 | ||
4515 | memset(&na, 0, sizeof(na)); | |
4516 | assert(!rfapiQprefix2Raddr(&qct, | |
4517 | &na.un)); | |
4518 | assert(!rfapiQprefix2Raddr(&qpt, | |
4519 | &na.vn)); | |
4520 | ||
4521 | if (skiplist_search( | |
4522 | (is_active | |
4523 | ? uniq_active_nves | |
4524 | : uniq_holddown_nves), | |
4525 | &na, (void **)&nap)) { | |
4526 | char line[BUFSIZ]; | |
4527 | ||
4528 | nap = XCALLOC( | |
4529 | MTYPE_RFAPI_NVE_ADDR, | |
4530 | sizeof(struct | |
4531 | rfapi_nve_addr)); | |
d62a17ae | 4532 | *nap = na; |
4533 | nap->info = is_active | |
4534 | ? pAHcount | |
4535 | : pHHcount; | |
4536 | skiplist_insert( | |
4537 | (is_active | |
4538 | ? uniq_active_nves | |
4539 | : uniq_holddown_nves), | |
4540 | nap, nap); | |
4541 | ||
4542 | rfapiNveAddr2Str(nap, line, | |
4543 | BUFSIZ); | |
4544 | } | |
4545 | } | |
4546 | ||
26a3ffd6 | 4547 | vnc_direct_bgp_rh_del_route(bgp, afi, rn_p, |
40381db7 | 4548 | bpi->peer); |
d62a17ae | 4549 | |
40381db7 | 4550 | RFAPI_UPDATE_ITABLE_COUNT(bpi, it, afi, -1); |
d62a17ae | 4551 | it->holddown_count[afi] += 1; |
40381db7 | 4552 | rfapiExpireVpnNow(it, rn, bpi, 1); |
d62a17ae | 4553 | |
4554 | vnc_zlog_debug_verbose( | |
4555 | "%s: incrementing count (is_active=%d)", | |
4556 | __func__, is_active); | |
4557 | ||
4558 | if (is_active) | |
4559 | ++*pARcount; | |
4560 | else | |
4561 | ++*pHRcount; | |
4562 | } | |
4563 | } | |
4564 | } | |
65efcfce LB |
4565 | } |
4566 | ||
4567 | ||
4568 | /* | |
4569 | * For use by the "clear vnc prefixes" command | |
4570 | */ | |
4571 | /*------------------------------------------ | |
4572 | * rfapiDeleteRemotePrefixes | |
4573 | * | |
4574 | * UI helper: For use by the "clear vnc prefixes" command | |
4575 | * | |
d62a17ae | 4576 | * input: |
65efcfce LB |
4577 | * un if set, tunnel must match this prefix |
4578 | * vn if set, nexthop prefix must match this prefix | |
4579 | * p if set, prefix must match this prefix | |
5ff06872 | 4580 | * it if set, only look in this import table |
65efcfce LB |
4581 | * |
4582 | * output | |
4583 | * pARcount number of active routes deleted | |
4584 | * pAHcount number of active nves deleted | |
4585 | * pHRcount number of holddown routes deleted | |
4586 | * pHHcount number of holddown nves deleted | |
4587 | * | |
4588 | * return value: | |
4589 | * void | |
4590 | --------------------------------------------*/ | |
d62a17ae | 4591 | void rfapiDeleteRemotePrefixes(struct prefix *un, struct prefix *vn, |
4592 | struct prefix *p, | |
4593 | struct rfapi_import_table *arg_it, | |
4594 | int delete_active, int delete_holddown, | |
4595 | uint32_t *pARcount, uint32_t *pAHcount, | |
4596 | uint32_t *pHRcount, uint32_t *pHHcount) | |
65efcfce | 4597 | { |
d62a17ae | 4598 | struct bgp *bgp; |
4599 | struct rfapi *h; | |
4600 | struct rfapi_import_table *it; | |
4601 | uint32_t deleted_holddown_route_count = 0; | |
4602 | uint32_t deleted_active_route_count = 0; | |
4603 | uint32_t deleted_holddown_nve_count = 0; | |
4604 | uint32_t deleted_active_nve_count = 0; | |
4605 | struct skiplist *uniq_holddown_nves; | |
4606 | struct skiplist *uniq_active_nves; | |
4607 | ||
4608 | VNC_ITRCCK; | |
4609 | ||
4610 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
4611 | /* If no bgp instantiated yet, no vnc prefixes exist */ | |
4612 | if (!bgp) | |
4613 | return; | |
4614 | ||
4615 | h = bgp->rfapi; | |
4616 | assert(h); | |
4617 | ||
4618 | uniq_holddown_nves = | |
4619 | skiplist_new(0, rfapi_nve_addr_cmp, delete_rem_pfx_na_free); | |
4620 | uniq_active_nves = | |
4621 | skiplist_new(0, rfapi_nve_addr_cmp, delete_rem_pfx_na_free); | |
4622 | ||
4623 | /* | |
4624 | * Iterate over all import tables; do a filtered import | |
4625 | * for the afi/safi combination | |
4626 | */ | |
4627 | ||
4628 | if (arg_it) | |
4629 | it = arg_it; | |
4630 | else | |
4631 | it = h->imports; | |
4632 | for (; it;) { | |
4633 | ||
4634 | vnc_zlog_debug_verbose( | |
4635 | "%s: calling rfapiDeleteRemotePrefixesIt() on (IP) import %p", | |
4636 | __func__, it); | |
4637 | ||
4638 | rfapiDeleteRemotePrefixesIt( | |
4639 | bgp, it, un, vn, p, delete_active, delete_holddown, | |
4640 | &deleted_active_route_count, &deleted_active_nve_count, | |
4641 | &deleted_holddown_route_count, | |
4642 | &deleted_holddown_nve_count, uniq_active_nves, | |
4643 | uniq_holddown_nves); | |
4644 | ||
4645 | if (arg_it) | |
4646 | it = NULL; | |
4647 | else | |
4648 | it = it->next; | |
4649 | } | |
4650 | ||
4651 | /* | |
4652 | * Now iterate over L2 import tables | |
4653 | */ | |
4654 | if (h->import_mac && !(p && (p->family != AF_ETHERNET))) { | |
4655 | ||
4656 | void *cursor = NULL; | |
4657 | int rc; | |
4658 | ||
9d303b37 DL |
4659 | for (cursor = NULL, |
4660 | rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4661 | &cursor); | |
d62a17ae | 4662 | !rc; rc = skiplist_next(h->import_mac, NULL, (void **)&it, |
4663 | &cursor)) { | |
4664 | ||
4665 | vnc_zlog_debug_verbose( | |
4666 | "%s: calling rfapiDeleteRemotePrefixesIt() on import_mac %p", | |
4667 | __func__, it); | |
4668 | ||
4669 | rfapiDeleteRemotePrefixesIt( | |
4670 | bgp, it, un, vn, p, delete_active, | |
4671 | delete_holddown, &deleted_active_route_count, | |
4672 | &deleted_active_nve_count, | |
4673 | &deleted_holddown_route_count, | |
4674 | &deleted_holddown_nve_count, uniq_active_nves, | |
4675 | uniq_holddown_nves); | |
4676 | } | |
4677 | } | |
4678 | ||
4679 | /* | |
4680 | * our custom element freeing function above counts as it deletes | |
4681 | */ | |
4682 | skiplist_free(uniq_holddown_nves); | |
4683 | skiplist_free(uniq_active_nves); | |
4684 | ||
4685 | if (pARcount) | |
4686 | *pARcount = deleted_active_route_count; | |
4687 | if (pAHcount) | |
4688 | *pAHcount = deleted_active_nve_count; | |
4689 | if (pHRcount) | |
4690 | *pHRcount = deleted_holddown_route_count; | |
4691 | if (pHHcount) | |
4692 | *pHHcount = deleted_holddown_nve_count; | |
4693 | ||
4694 | VNC_ITRCCK; | |
65efcfce LB |
4695 | } |
4696 | ||
4697 | /*------------------------------------------ | |
4698 | * rfapiCountRemoteRoutes | |
4699 | * | |
4700 | * UI helper: count VRF routes from BGP side | |
4701 | * | |
d62a17ae | 4702 | * input: |
65efcfce LB |
4703 | * |
4704 | * output | |
4705 | * pALRcount count of active local routes | |
4706 | * pARRcount count of active remote routes | |
4707 | * pHRcount count of holddown routes | |
4708 | * pIRcount count of direct imported routes | |
4709 | * | |
4710 | * return value: | |
4711 | * void | |
4712 | --------------------------------------------*/ | |
d62a17ae | 4713 | void rfapiCountAllItRoutes(int *pALRcount, /* active local routes */ |
4714 | int *pARRcount, /* active remote routes */ | |
4715 | int *pHRcount, /* holddown routes */ | |
4716 | int *pIRcount) /* imported routes */ | |
65efcfce | 4717 | { |
d62a17ae | 4718 | struct bgp *bgp; |
4719 | struct rfapi *h; | |
4720 | struct rfapi_import_table *it; | |
4721 | afi_t afi; | |
4722 | ||
4723 | int total_active_local = 0; | |
4724 | int total_active_remote = 0; | |
4725 | int total_holddown = 0; | |
4726 | int total_imported = 0; | |
4727 | ||
4728 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
4729 | assert(bgp); | |
4730 | ||
4731 | h = bgp->rfapi; | |
4732 | assert(h); | |
4733 | ||
4734 | /* | |
4735 | * Iterate over all import tables; do a filtered import | |
4736 | * for the afi/safi combination | |
4737 | */ | |
4738 | ||
4739 | for (it = h->imports; it; it = it->next) { | |
4740 | ||
4741 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
4742 | ||
4743 | total_active_local += it->local_count[afi]; | |
4744 | total_active_remote += it->remote_count[afi]; | |
4745 | total_holddown += it->holddown_count[afi]; | |
4746 | total_imported += it->imported_count[afi]; | |
4747 | } | |
4748 | } | |
4749 | ||
4750 | void *cursor; | |
4751 | int rc; | |
4752 | ||
4753 | if (h->import_mac) { | |
9d303b37 DL |
4754 | for (cursor = NULL, |
4755 | rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4756 | &cursor); | |
d62a17ae | 4757 | !rc; rc = skiplist_next(h->import_mac, NULL, (void **)&it, |
4758 | &cursor)) { | |
4759 | ||
4760 | total_active_local += it->local_count[AFI_L2VPN]; | |
4761 | total_active_remote += it->remote_count[AFI_L2VPN]; | |
4762 | total_holddown += it->holddown_count[AFI_L2VPN]; | |
4763 | total_imported += it->imported_count[AFI_L2VPN]; | |
4764 | } | |
4765 | } | |
4766 | ||
4767 | ||
4768 | if (pALRcount) { | |
4769 | *pALRcount = total_active_local; | |
4770 | } | |
4771 | if (pARRcount) { | |
4772 | *pARRcount = total_active_remote; | |
4773 | } | |
4774 | if (pHRcount) { | |
4775 | *pHRcount = total_holddown; | |
4776 | } | |
4777 | if (pIRcount) { | |
4778 | *pIRcount = total_imported; | |
4779 | } | |
65efcfce LB |
4780 | } |
4781 | ||
4782 | /*------------------------------------------ | |
4783 | * rfapiGetHolddownFromLifetime | |
4784 | * | |
4785 | * calculate holddown value based on lifetime | |
4786 | * | |
d62a17ae | 4787 | * input: |
65efcfce LB |
4788 | * lifetime lifetime |
4789 | * | |
4790 | * return value: | |
4791 | * Holddown value based on lifetime, holddown_factor, | |
4792 | * and RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY | |
4793 | * | |
4794 | --------------------------------------------*/ | |
4795 | /* hold down time maxes out at RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY */ | |
d62a17ae | 4796 | uint32_t rfapiGetHolddownFromLifetime(uint32_t lifetime) |
65efcfce | 4797 | { |
d62a17ae | 4798 | uint32_t factor; |
4799 | struct bgp *bgp; | |
4800 | ||
4801 | bgp = bgp_get_default(); | |
4802 | if (bgp && bgp->rfapi_cfg) | |
4803 | factor = bgp->rfapi_cfg->rfp_cfg.holddown_factor; | |
4804 | else | |
4805 | factor = RFAPI_RFP_CFG_DEFAULT_HOLDDOWN_FACTOR; | |
4806 | ||
4807 | if (factor < 100 || lifetime < RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY) | |
4808 | lifetime = lifetime * factor / 100; | |
4809 | if (lifetime < RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY) | |
4810 | return lifetime; | |
4811 | else | |
4812 | return RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY; | |
65efcfce | 4813 | } |