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d62a17ae | 1 | /* |
9d303b37 DL |
2 | * |
3 | * Copyright 2009-2016, LabN Consulting, L.L.C. | |
4 | * | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version 2 | |
9 | * of the License, or (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along | |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
65efcfce LB |
20 | |
21 | /* | |
22 | * File: rfapi_import.c | |
23 | * Purpose: Handle import of routes from BGP to RFAPI | |
24 | */ | |
25 | ||
f8b6f499 LB |
26 | #include "lib/zebra.h" |
27 | #include "lib/prefix.h" | |
fe08ba7e | 28 | #include "lib/agg_table.h" |
f8b6f499 LB |
29 | #include "lib/vty.h" |
30 | #include "lib/memory.h" | |
31 | #include "lib/log.h" | |
32 | #include "lib/skiplist.h" | |
33 | #include "lib/thread.h" | |
937652c6 | 34 | #include "lib/stream.h" |
02705213 | 35 | #include "lib/lib_errors.h" |
65efcfce | 36 | |
f8b6f499 LB |
37 | #include "bgpd/bgpd.h" |
38 | #include "bgpd/bgp_ecommunity.h" | |
39 | #include "bgpd/bgp_attr.h" | |
40 | #include "bgpd/bgp_route.h" | |
d62a17ae | 41 | #include "bgpd/bgp_mplsvpn.h" /* prefix_rd2str() */ |
f8b6f499 | 42 | #include "bgpd/bgp_vnc_types.h" |
06b9f471 | 43 | #include "bgpd/bgp_rd.h" |
65efcfce | 44 | |
f8b6f499 LB |
45 | #include "bgpd/rfapi/rfapi.h" |
46 | #include "bgpd/rfapi/bgp_rfapi_cfg.h" | |
47 | #include "bgpd/rfapi/rfapi_backend.h" | |
48 | #include "bgpd/rfapi/rfapi_import.h" | |
49 | #include "bgpd/rfapi/rfapi_private.h" | |
50 | #include "bgpd/rfapi/rfapi_monitor.h" | |
51 | #include "bgpd/rfapi/rfapi_nve_addr.h" | |
52 | #include "bgpd/rfapi/rfapi_vty.h" | |
53 | #include "bgpd/rfapi/vnc_export_bgp.h" | |
54 | #include "bgpd/rfapi/vnc_export_bgp_p.h" | |
55 | #include "bgpd/rfapi/vnc_zebra.h" | |
56 | #include "bgpd/rfapi/vnc_import_bgp.h" | |
57 | #include "bgpd/rfapi/vnc_import_bgp_p.h" | |
58 | #include "bgpd/rfapi/rfapi_rib.h" | |
59 | #include "bgpd/rfapi/rfapi_encap_tlv.h" | |
60 | #include "bgpd/rfapi/vnc_debug.h" | |
65efcfce LB |
61 | |
62 | #ifdef HAVE_GLIBC_BACKTRACE | |
63 | /* for backtrace and friends */ | |
64 | #include <execinfo.h> | |
65 | #endif /* HAVE_GLIBC_BACKTRACE */ | |
66 | ||
67 | #undef DEBUG_MONITOR_MOVE_SHORTER | |
68 | #undef DEBUG_RETURNED_NHL | |
69 | #undef DEBUG_ROUTE_COUNTERS | |
70 | #undef DEBUG_ENCAP_MONITOR | |
71 | #undef DEBUG_L2_EXTRA | |
72 | #undef DEBUG_IT_NODES | |
73 | #undef DEBUG_BI_SEARCH | |
74 | ||
75 | /* | |
76 | * Allocated for each withdraw timer instance; freed when the timer | |
77 | * expires or is canceled | |
78 | */ | |
d62a17ae | 79 | struct rfapi_withdraw { |
80 | struct rfapi_import_table *import_table; | |
fe08ba7e | 81 | struct agg_node *node; |
4b7e6066 | 82 | struct bgp_path_info *info; |
d62a17ae | 83 | safi_t safi; /* used only for bulk operations */ |
84 | /* | |
85 | * For import table node reference count checking (i.e., debugging). | |
86 | * Normally when a timer expires, lockoffset should be 0. However, if | |
87 | * the timer expiration function is called directly (e.g., | |
88 | * rfapiExpireVpnNow), the node could be locked by a preceding | |
fe08ba7e DS |
89 | * agg_route_top() or agg_route_next() in a loop, so we need to pass |
90 | * this value in. | |
d62a17ae | 91 | */ |
92 | int lockoffset; | |
65efcfce LB |
93 | }; |
94 | ||
d62a17ae | 95 | /* |
65efcfce LB |
96 | * DEBUG FUNCTION |
97 | * It's evil and fiendish. It's compiler-dependent. | |
98 | * ? Might need LDFLAGS -rdynamic to produce all function names | |
99 | */ | |
d62a17ae | 100 | void rfapiDebugBacktrace(void) |
65efcfce LB |
101 | { |
102 | #ifdef HAVE_GLIBC_BACKTRACE | |
103 | #define RFAPI_DEBUG_BACKTRACE_NENTRIES 200 | |
d62a17ae | 104 | void *buf[RFAPI_DEBUG_BACKTRACE_NENTRIES]; |
105 | char **syms; | |
106 | size_t i; | |
107 | size_t size; | |
65efcfce | 108 | |
d62a17ae | 109 | size = backtrace(buf, RFAPI_DEBUG_BACKTRACE_NENTRIES); |
110 | syms = backtrace_symbols(buf, size); | |
65efcfce | 111 | |
d62a17ae | 112 | for (i = 0; i < size && i < RFAPI_DEBUG_BACKTRACE_NENTRIES; ++i) { |
113 | vnc_zlog_debug_verbose("backtrace[%2zu]: %s", i, syms[i]); | |
114 | } | |
65efcfce | 115 | |
d62a17ae | 116 | free(syms); |
65efcfce LB |
117 | #else |
118 | #endif | |
119 | } | |
120 | ||
121 | /* | |
122 | * DEBUG FUNCTION | |
123 | * Count remote routes and compare with actively-maintained values. | |
124 | * Abort if they disagree. | |
125 | */ | |
4d762f26 | 126 | void rfapiCheckRouteCount(void) |
65efcfce | 127 | { |
d62a17ae | 128 | struct bgp *bgp = bgp_get_default(); |
129 | struct rfapi *h; | |
130 | struct rfapi_import_table *it; | |
131 | afi_t afi; | |
132 | ||
133 | assert(bgp); | |
134 | ||
135 | h = bgp->rfapi; | |
136 | assert(h); | |
137 | ||
138 | for (it = h->imports; it; it = it->next) { | |
139 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
140 | ||
fe08ba7e DS |
141 | struct agg_table *rt; |
142 | struct agg_node *rn; | |
d62a17ae | 143 | |
144 | int holddown_count = 0; | |
145 | int local_count = 0; | |
146 | int imported_count = 0; | |
147 | int remote_count = 0; | |
148 | ||
149 | rt = it->imported_vpn[afi]; | |
150 | ||
fe08ba7e DS |
151 | for (rn = agg_route_top(rt); rn; |
152 | rn = agg_route_next(rn)) { | |
40381db7 | 153 | struct bgp_path_info *bpi; |
4b7e6066 | 154 | struct bgp_path_info *next; |
d62a17ae | 155 | |
40381db7 DS |
156 | for (bpi = rn->info; bpi; bpi = next) { |
157 | next = bpi->next; | |
d62a17ae | 158 | |
40381db7 | 159 | if (CHECK_FLAG(bpi->flags, |
1defdda8 | 160 | BGP_PATH_REMOVED)) { |
d62a17ae | 161 | ++holddown_count; |
162 | ||
163 | } else { | |
40381db7 | 164 | if (RFAPI_LOCAL_BI(bpi)) { |
d62a17ae | 165 | ++local_count; |
166 | } else { | |
167 | if (RFAPI_DIRECT_IMPORT_BI( | |
40381db7 | 168 | bpi)) { |
d62a17ae | 169 | ++imported_count; |
170 | } else { | |
171 | ++remote_count; | |
172 | } | |
173 | } | |
174 | } | |
175 | } | |
176 | } | |
177 | ||
178 | if (it->holddown_count[afi] != holddown_count) { | |
179 | vnc_zlog_debug_verbose( | |
180 | "%s: it->holddown_count %d != holddown_count %d", | |
181 | __func__, it->holddown_count[afi], | |
182 | holddown_count); | |
183 | assert(0); | |
184 | } | |
185 | if (it->remote_count[afi] != remote_count) { | |
186 | vnc_zlog_debug_verbose( | |
187 | "%s: it->remote_count %d != remote_count %d", | |
188 | __func__, it->remote_count[afi], | |
189 | remote_count); | |
190 | assert(0); | |
191 | } | |
192 | if (it->imported_count[afi] != imported_count) { | |
193 | vnc_zlog_debug_verbose( | |
194 | "%s: it->imported_count %d != imported_count %d", | |
195 | __func__, it->imported_count[afi], | |
196 | imported_count); | |
197 | assert(0); | |
198 | } | |
199 | } | |
200 | } | |
65efcfce LB |
201 | } |
202 | ||
1e20238a | 203 | #ifdef DEBUG_ROUTE_COUNTERS |
65efcfce LB |
204 | #define VNC_ITRCCK do {rfapiCheckRouteCount();} while (0) |
205 | #else | |
206 | #define VNC_ITRCCK | |
207 | #endif | |
208 | ||
209 | /* | |
210 | * Validate reference count for a node in an import table | |
211 | * | |
212 | * Normally lockoffset is 0 for nodes in quiescent state. However, | |
fe08ba7e | 213 | * agg_unlock_node will delete the node if it is called when |
65efcfce LB |
214 | * node->lock == 1, and we have to validate the refcount before |
215 | * the node is deleted. In this case, we specify lockoffset 1. | |
216 | */ | |
fe08ba7e | 217 | void rfapiCheckRefcount(struct agg_node *rn, safi_t safi, int lockoffset) |
65efcfce | 218 | { |
40381db7 | 219 | unsigned int count_bpi = 0; |
d62a17ae | 220 | unsigned int count_monitor = 0; |
40381db7 | 221 | struct bgp_path_info *bpi; |
d62a17ae | 222 | struct rfapi_monitor_encap *hme; |
223 | struct rfapi_monitor_vpn *hmv; | |
224 | ||
40381db7 DS |
225 | for (bpi = rn->info; bpi; bpi = bpi->next) |
226 | ++count_bpi; | |
d62a17ae | 227 | |
228 | ||
229 | if (rn->aggregate) { | |
230 | ++count_monitor; /* rfapi_it_extra */ | |
231 | ||
232 | switch (safi) { | |
233 | void *cursor; | |
234 | int rc; | |
235 | ||
236 | case SAFI_ENCAP: | |
237 | for (hme = RFAPI_MONITOR_ENCAP(rn); hme; | |
238 | hme = hme->next) | |
239 | ++count_monitor; | |
240 | break; | |
241 | ||
242 | case SAFI_MPLS_VPN: | |
243 | ||
244 | for (hmv = RFAPI_MONITOR_VPN(rn); hmv; hmv = hmv->next) | |
245 | ++count_monitor; | |
246 | ||
247 | if (RFAPI_MONITOR_EXTERIOR(rn)->source) { | |
248 | ++count_monitor; /* sl */ | |
249 | cursor = NULL; | |
250 | for (rc = skiplist_next( | |
251 | RFAPI_MONITOR_EXTERIOR(rn)->source, | |
252 | NULL, NULL, &cursor); | |
253 | !rc; | |
254 | rc = skiplist_next( | |
255 | RFAPI_MONITOR_EXTERIOR(rn)->source, | |
256 | NULL, NULL, &cursor)) { | |
257 | ||
258 | ++count_monitor; /* sl entry */ | |
259 | } | |
260 | } | |
261 | break; | |
262 | ||
58cf0823 DS |
263 | case SAFI_UNSPEC: |
264 | case SAFI_UNICAST: | |
265 | case SAFI_MULTICAST: | |
266 | case SAFI_EVPN: | |
267 | case SAFI_LABELED_UNICAST: | |
268 | case SAFI_FLOWSPEC: | |
269 | case SAFI_MAX: | |
270 | assert(!"Passed in safi should be impossible"); | |
d62a17ae | 271 | } |
272 | } | |
273 | ||
c10e14e9 DS |
274 | if (count_bpi + count_monitor + lockoffset |
275 | != agg_node_get_lock_count(rn)) { | |
d62a17ae | 276 | vnc_zlog_debug_verbose( |
40381db7 DS |
277 | "%s: count_bpi=%d, count_monitor=%d, lockoffset=%d, rn->lock=%d", |
278 | __func__, count_bpi, count_monitor, lockoffset, | |
c10e14e9 | 279 | agg_node_get_lock_count(rn)); |
d62a17ae | 280 | assert(0); |
281 | } | |
65efcfce LB |
282 | } |
283 | ||
284 | /* | |
285 | * Perform deferred rfapi_close operations that were queued | |
286 | * during callbacks. | |
287 | */ | |
d62a17ae | 288 | static wq_item_status rfapi_deferred_close_workfunc(struct work_queue *q, |
289 | void *data) | |
65efcfce | 290 | { |
d62a17ae | 291 | struct rfapi_descriptor *rfd = data; |
292 | struct rfapi *h = q->spec.data; | |
293 | ||
294 | assert(!(h->flags & RFAPI_INCALLBACK)); | |
295 | rfapi_close(rfd); | |
296 | vnc_zlog_debug_verbose("%s: completed deferred close on handle %p", | |
297 | __func__, rfd); | |
298 | return WQ_SUCCESS; | |
65efcfce LB |
299 | } |
300 | ||
301 | /* | |
302 | * Extract layer 2 option from Encap TLVS in BGP attrs | |
303 | */ | |
d62a17ae | 304 | int rfapiGetL2o(struct attr *attr, struct rfapi_l2address_option *l2o) |
65efcfce | 305 | { |
d62a17ae | 306 | if (attr) { |
d62a17ae | 307 | struct bgp_attr_encap_subtlv *pEncap; |
308 | ||
91ebf12c | 309 | for (pEncap = bgp_attr_get_vnc_subtlvs(attr); pEncap; |
d62a17ae | 310 | pEncap = pEncap->next) { |
311 | ||
312 | if (pEncap->type == BGP_VNC_SUBTLV_TYPE_RFPOPTION) { | |
313 | if (pEncap->value[0] | |
314 | == RFAPI_VN_OPTION_TYPE_L2ADDR) { | |
315 | ||
316 | if (pEncap->value[1] == 14) { | |
317 | memcpy(l2o->macaddr.octet, | |
318 | pEncap->value + 2, | |
28328ea9 | 319 | ETH_ALEN); |
d62a17ae | 320 | l2o->label = |
321 | ((pEncap->value[10] | |
322 | >> 4) | |
323 | & 0x0f) | |
324 | + ((pEncap->value[9] | |
325 | << 4) | |
326 | & 0xff0) | |
327 | + ((pEncap->value[8] | |
328 | << 12) | |
329 | & 0xff000); | |
330 | ||
331 | l2o->local_nve_id = | |
332 | pEncap->value[12]; | |
333 | ||
334 | l2o->logical_net_id = | |
335 | (pEncap->value[15] | |
336 | & 0xff) | |
337 | + ((pEncap->value[14] | |
338 | << 8) | |
339 | & 0xff00) | |
340 | + ((pEncap->value[13] | |
341 | << 16) | |
342 | & 0xff0000); | |
343 | } | |
344 | ||
345 | return 0; | |
346 | } | |
347 | } | |
348 | } | |
349 | } | |
350 | ||
351 | return ENOENT; | |
65efcfce LB |
352 | } |
353 | ||
354 | /* | |
355 | * Extract the lifetime from the Tunnel Encap attribute of a route in | |
356 | * an import table | |
357 | */ | |
d62a17ae | 358 | int rfapiGetVncLifetime(struct attr *attr, uint32_t *lifetime) |
65efcfce | 359 | { |
d62a17ae | 360 | struct bgp_attr_encap_subtlv *pEncap; |
65efcfce | 361 | |
d62a17ae | 362 | *lifetime = RFAPI_INFINITE_LIFETIME; /* default to infinite */ |
65efcfce | 363 | |
d62a17ae | 364 | if (attr) { |
65efcfce | 365 | |
91ebf12c | 366 | for (pEncap = bgp_attr_get_vnc_subtlvs(attr); pEncap; |
d62a17ae | 367 | pEncap = pEncap->next) { |
65efcfce | 368 | |
d62a17ae | 369 | if (pEncap->type |
370 | == BGP_VNC_SUBTLV_TYPE_LIFETIME) { /* lifetime */ | |
371 | if (pEncap->length == 4) { | |
372 | memcpy(lifetime, pEncap->value, 4); | |
373 | *lifetime = ntohl(*lifetime); | |
374 | return 0; | |
375 | } | |
376 | } | |
377 | } | |
378 | } | |
65efcfce | 379 | |
d62a17ae | 380 | return ENOENT; |
65efcfce LB |
381 | } |
382 | ||
65efcfce LB |
383 | /* |
384 | * Look for UN address in Encap attribute | |
385 | */ | |
d62a17ae | 386 | int rfapiGetVncTunnelUnAddr(struct attr *attr, struct prefix *p) |
65efcfce | 387 | { |
d62a17ae | 388 | struct bgp_attr_encap_subtlv *pEncap; |
f4bd90c5 | 389 | bgp_encap_types tun_type = BGP_ENCAP_TYPE_MPLS;/*Default tunnel type*/ |
d62a17ae | 390 | |
f4bd90c5 | 391 | bgp_attr_extcom_tunnel_type(attr, &tun_type); |
d62a17ae | 392 | if (tun_type == BGP_ENCAP_TYPE_MPLS) { |
393 | if (!p) | |
394 | return 0; | |
395 | /* MPLS carries UN address in next hop */ | |
396 | rfapiNexthop2Prefix(attr, p); | |
c7ca5ccf | 397 | if (p->family != AF_UNSPEC) |
d62a17ae | 398 | return 0; |
399 | ||
400 | return ENOENT; | |
401 | } | |
402 | if (attr) { | |
403 | for (pEncap = attr->encap_subtlvs; pEncap; | |
404 | pEncap = pEncap->next) { | |
405 | ||
406 | if (pEncap->type | |
407 | == BGP_ENCAP_SUBTLV_TYPE_REMOTE_ENDPOINT) { /* un | |
408 | addr | |
409 | */ | |
410 | switch (pEncap->length) { | |
411 | case 8: | |
412 | if (p) { | |
413 | p->family = AF_INET; | |
30360041 | 414 | p->prefixlen = IPV4_MAX_BITLEN; |
d62a17ae | 415 | memcpy(p->u.val, pEncap->value, |
416 | 4); | |
417 | } | |
418 | return 0; | |
419 | ||
420 | case 20: | |
421 | if (p) { | |
422 | p->family = AF_INET6; | |
135e9bdb | 423 | p->prefixlen = IPV6_MAX_BITLEN; |
d62a17ae | 424 | memcpy(p->u.val, pEncap->value, |
425 | 16); | |
426 | } | |
427 | return 0; | |
428 | } | |
429 | } | |
430 | } | |
431 | } | |
432 | ||
433 | return ENOENT; | |
65efcfce LB |
434 | } |
435 | ||
436 | /* | |
437 | * Get UN address wherever it might be | |
438 | */ | |
40381db7 | 439 | int rfapiGetUnAddrOfVpnBi(struct bgp_path_info *bpi, struct prefix *p) |
65efcfce | 440 | { |
d62a17ae | 441 | /* If it's in this route's VNC attribute, we're done */ |
40381db7 | 442 | if (!rfapiGetVncTunnelUnAddr(bpi->attr, p)) |
d62a17ae | 443 | return 0; |
444 | /* | |
445 | * Otherwise, see if it's cached from a corresponding ENCAP SAFI | |
446 | * advertisement | |
447 | */ | |
40381db7 DS |
448 | if (bpi->extra) { |
449 | switch (bpi->extra->vnc.import.un_family) { | |
d62a17ae | 450 | case AF_INET: |
451 | if (p) { | |
40381db7 DS |
452 | p->family = bpi->extra->vnc.import.un_family; |
453 | p->u.prefix4 = bpi->extra->vnc.import.un.addr4; | |
30360041 | 454 | p->prefixlen = IPV4_MAX_BITLEN; |
d62a17ae | 455 | } |
456 | return 0; | |
457 | case AF_INET6: | |
458 | if (p) { | |
40381db7 DS |
459 | p->family = bpi->extra->vnc.import.un_family; |
460 | p->u.prefix6 = bpi->extra->vnc.import.un.addr6; | |
135e9bdb | 461 | p->prefixlen = IPV6_MAX_BITLEN; |
d62a17ae | 462 | } |
463 | return 0; | |
464 | default: | |
465 | if (p) | |
c7ca5ccf | 466 | p->family = AF_UNSPEC; |
1e20238a | 467 | #ifdef DEBUG_ENCAP_MONITOR |
d62a17ae | 468 | vnc_zlog_debug_verbose( |
40381db7 | 469 | "%s: bpi->extra->vnc.import.un_family is 0, no UN addr", |
d62a17ae | 470 | __func__); |
65efcfce | 471 | #endif |
d62a17ae | 472 | break; |
473 | } | |
474 | } | |
65efcfce | 475 | |
d62a17ae | 476 | return ENOENT; |
65efcfce LB |
477 | } |
478 | ||
479 | ||
480 | /* | |
9b6d8fcf | 481 | * Make a new bgp_path_info from gathered parameters |
65efcfce | 482 | */ |
4b7e6066 DS |
483 | static struct bgp_path_info *rfapiBgpInfoCreate(struct attr *attr, |
484 | struct peer *peer, void *rfd, | |
485 | struct prefix_rd *prd, | |
486 | uint8_t type, uint8_t sub_type, | |
487 | uint32_t *label) | |
65efcfce | 488 | { |
4b7e6066 | 489 | struct bgp_path_info *new; |
d62a17ae | 490 | |
9591da26 DS |
491 | new = info_make(type, sub_type, 0, peer, attr, NULL); |
492 | ||
05864da7 | 493 | new->attr = bgp_attr_intern(attr); |
d62a17ae | 494 | |
18ee8310 | 495 | bgp_path_info_extra_get(new); |
d62a17ae | 496 | if (prd) { |
497 | new->extra->vnc.import.rd = *prd; | |
98b7e975 | 498 | new->extra->vnc.import.create_time = monotime(NULL); |
d62a17ae | 499 | } |
500 | if (label) | |
317f1fe0 | 501 | encode_label(*label, &new->extra->label[0]); |
9591da26 | 502 | |
d62a17ae | 503 | peer_lock(peer); |
504 | ||
505 | return new; | |
65efcfce LB |
506 | } |
507 | ||
508 | /* | |
9b6d8fcf | 509 | * Frees bgp_path_info as used in import tables (parts are not |
65efcfce LB |
510 | * allocated exactly the way they are in the main RIBs) |
511 | */ | |
4b7e6066 | 512 | static void rfapiBgpInfoFree(struct bgp_path_info *goner) |
65efcfce | 513 | { |
d62a17ae | 514 | if (!goner) |
515 | return; | |
516 | ||
517 | if (goner->peer) { | |
518 | vnc_zlog_debug_verbose("%s: calling peer_unlock(%p), #%d", | |
519 | __func__, goner->peer, | |
520 | goner->peer->lock); | |
521 | peer_unlock(goner->peer); | |
522 | } | |
523 | ||
05864da7 DS |
524 | bgp_attr_unintern(&goner->attr); |
525 | ||
a2e219fe PG |
526 | if (goner->extra) |
527 | bgp_path_info_extra_free(&goner->extra); | |
d62a17ae | 528 | XFREE(MTYPE_BGP_ROUTE, goner); |
65efcfce LB |
529 | } |
530 | ||
d62a17ae | 531 | struct rfapi_import_table *rfapiMacImportTableGetNoAlloc(struct bgp *bgp, |
532 | uint32_t lni) | |
65efcfce | 533 | { |
d62a17ae | 534 | struct rfapi *h; |
535 | struct rfapi_import_table *it = NULL; | |
536 | uintptr_t lni_as_ptr = lni; | |
65efcfce | 537 | |
d62a17ae | 538 | h = bgp->rfapi; |
539 | if (!h) | |
540 | return NULL; | |
65efcfce | 541 | |
d62a17ae | 542 | if (!h->import_mac) |
543 | return NULL; | |
65efcfce | 544 | |
d62a17ae | 545 | if (skiplist_search(h->import_mac, (void *)lni_as_ptr, (void **)&it)) |
546 | return NULL; | |
65efcfce | 547 | |
d62a17ae | 548 | return it; |
65efcfce LB |
549 | } |
550 | ||
d62a17ae | 551 | struct rfapi_import_table *rfapiMacImportTableGet(struct bgp *bgp, uint32_t lni) |
65efcfce | 552 | { |
d62a17ae | 553 | struct rfapi *h; |
554 | struct rfapi_import_table *it = NULL; | |
555 | uintptr_t lni_as_ptr = lni; | |
556 | ||
557 | h = bgp->rfapi; | |
558 | assert(h); | |
559 | ||
560 | if (!h->import_mac) { | |
561 | /* default cmp is good enough for LNI */ | |
562 | h->import_mac = skiplist_new(0, NULL, NULL); | |
563 | } | |
564 | ||
565 | if (skiplist_search(h->import_mac, (void *)lni_as_ptr, (void **)&it)) { | |
566 | ||
567 | struct ecommunity *enew; | |
568 | struct ecommunity_val eval; | |
569 | afi_t afi; | |
570 | ||
571 | it = XCALLOC(MTYPE_RFAPI_IMPORTTABLE, | |
572 | sizeof(struct rfapi_import_table)); | |
573 | /* set RT list of new import table based on LNI */ | |
574 | memset((char *)&eval, 0, sizeof(eval)); | |
575 | eval.val[0] = 0; /* VNC L2VPN */ | |
576 | eval.val[1] = 2; /* VNC L2VPN */ | |
577 | eval.val[5] = (lni >> 16) & 0xff; | |
578 | eval.val[6] = (lni >> 8) & 0xff; | |
579 | eval.val[7] = (lni >> 0) & 0xff; | |
580 | ||
581 | enew = ecommunity_new(); | |
1207a5bc | 582 | ecommunity_add_val(enew, &eval, false, false); |
d62a17ae | 583 | it->rt_import_list = enew; |
584 | ||
585 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
fe08ba7e DS |
586 | it->imported_vpn[afi] = agg_table_init(); |
587 | it->imported_encap[afi] = agg_table_init(); | |
d62a17ae | 588 | } |
589 | ||
590 | it->l2_logical_net_id = lni; | |
591 | ||
592 | skiplist_insert(h->import_mac, (void *)lni_as_ptr, it); | |
593 | } | |
594 | ||
595 | assert(it); | |
596 | return it; | |
65efcfce LB |
597 | } |
598 | ||
599 | /* | |
600 | * Implement MONITOR_MOVE_SHORTER(original_node) from | |
601 | * RFAPI-Import-Event-Handling.txt | |
d62a17ae | 602 | * |
65efcfce LB |
603 | * Returns pointer to the list of moved monitors |
604 | */ | |
605 | static struct rfapi_monitor_vpn * | |
fe08ba7e | 606 | rfapiMonitorMoveShorter(struct agg_node *original_vpn_node, int lockoffset) |
65efcfce | 607 | { |
40381db7 | 608 | struct bgp_path_info *bpi; |
fe08ba7e | 609 | struct agg_node *par; |
d62a17ae | 610 | struct rfapi_monitor_vpn *m; |
611 | struct rfapi_monitor_vpn *mlast; | |
612 | struct rfapi_monitor_vpn *moved; | |
613 | int movecount = 0; | |
614 | int parent_already_refcounted = 0; | |
65efcfce | 615 | |
d62a17ae | 616 | RFAPI_CHECK_REFCOUNT(original_vpn_node, SAFI_MPLS_VPN, lockoffset); |
65efcfce | 617 | |
1e20238a | 618 | #ifdef DEBUG_MONITOR_MOVE_SHORTER |
d62a17ae | 619 | { |
2dbe669b DA |
620 | vnc_zlog_debug_verbose("%s: called with node pfx=%pFX", |
621 | __func__, &original_vpn_node->p); | |
d62a17ae | 622 | } |
65efcfce LB |
623 | #endif |
624 | ||
d62a17ae | 625 | /* |
40381db7 | 626 | * 1. If there is at least one bpi (either regular route or |
d62a17ae | 627 | * route marked as withdrawn, with a pending timer) at |
628 | * original_node with a valid UN address, we're done. Return. | |
629 | */ | |
40381db7 | 630 | for (bpi = original_vpn_node->info; bpi; bpi = bpi->next) { |
d62a17ae | 631 | struct prefix pfx; |
632 | ||
40381db7 | 633 | if (!rfapiGetUnAddrOfVpnBi(bpi, &pfx)) { |
1e20238a | 634 | #ifdef DEBUG_MONITOR_MOVE_SHORTER |
d62a17ae | 635 | vnc_zlog_debug_verbose( |
636 | "%s: have valid UN at original node, no change", | |
637 | __func__); | |
65efcfce | 638 | #endif |
d62a17ae | 639 | return NULL; |
640 | } | |
641 | } | |
642 | ||
643 | /* | |
644 | * 2. Travel up the tree (toward less-specific prefixes) from | |
645 | * original_node to find the first node that has at least | |
646 | * one route (even if it is only a withdrawn route) with a | |
647 | * valid UN address. Call this node "Node P." | |
648 | */ | |
fe08ba7e DS |
649 | for (par = agg_node_parent(original_vpn_node); par; |
650 | par = agg_node_parent(par)) { | |
40381db7 | 651 | for (bpi = par->info; bpi; bpi = bpi->next) { |
d62a17ae | 652 | struct prefix pfx; |
40381db7 | 653 | if (!rfapiGetUnAddrOfVpnBi(bpi, &pfx)) { |
d62a17ae | 654 | break; |
655 | } | |
656 | } | |
40381db7 | 657 | if (bpi) |
d62a17ae | 658 | break; |
659 | } | |
660 | ||
661 | if (par) { | |
662 | RFAPI_CHECK_REFCOUNT(par, SAFI_MPLS_VPN, 0); | |
663 | } | |
664 | ||
665 | /* | |
666 | * If no less-specific routes, try to use the 0/0 node | |
667 | */ | |
668 | if (!par) { | |
26a3ffd6 | 669 | const struct prefix *p; |
d62a17ae | 670 | /* this isn't necessarily 0/0 */ |
fe08ba7e | 671 | par = agg_route_table_top(original_vpn_node); |
d62a17ae | 672 | |
26a3ffd6 DS |
673 | if (par) |
674 | p = agg_node_get_prefix(par); | |
d62a17ae | 675 | /* |
676 | * If we got the top node but it wasn't 0/0, | |
677 | * ignore it | |
678 | */ | |
26a3ffd6 | 679 | if (par && p->prefixlen) { |
fe08ba7e | 680 | agg_unlock_node(par); /* maybe free */ |
d62a17ae | 681 | par = NULL; |
682 | } | |
683 | ||
684 | if (par) { | |
685 | ++parent_already_refcounted; | |
686 | } | |
687 | } | |
688 | ||
689 | /* | |
690 | * Create 0/0 node if it isn't there | |
691 | */ | |
692 | if (!par) { | |
693 | struct prefix pfx_default; | |
26a3ffd6 | 694 | const struct prefix *p = agg_node_get_prefix(original_vpn_node); |
d62a17ae | 695 | |
696 | memset(&pfx_default, 0, sizeof(pfx_default)); | |
26a3ffd6 | 697 | pfx_default.family = p->family; |
d62a17ae | 698 | |
699 | /* creates default node if none exists */ | |
fe08ba7e DS |
700 | par = agg_node_get(agg_get_table(original_vpn_node), |
701 | &pfx_default); | |
d62a17ae | 702 | ++parent_already_refcounted; |
703 | } | |
704 | ||
705 | /* | |
706 | * 3. Move each of the monitors found at original_node to Node P. | |
707 | * These are "Moved Monitors." | |
708 | * | |
709 | */ | |
710 | ||
711 | /* | |
712 | * Attach at end so that the list pointer we return points | |
713 | * only to the moved routes | |
714 | */ | |
715 | for (m = RFAPI_MONITOR_VPN(par), mlast = NULL; m; | |
716 | mlast = m, m = m->next) | |
717 | ; | |
718 | ||
719 | if (mlast) { | |
720 | moved = mlast->next = RFAPI_MONITOR_VPN(original_vpn_node); | |
721 | } else { | |
722 | moved = RFAPI_MONITOR_VPN_W_ALLOC(par) = | |
723 | RFAPI_MONITOR_VPN(original_vpn_node); | |
724 | } | |
725 | if (RFAPI_MONITOR_VPN( | |
726 | original_vpn_node)) /* check agg, so not allocated */ | |
727 | RFAPI_MONITOR_VPN_W_ALLOC(original_vpn_node) = NULL; | |
728 | ||
729 | /* | |
730 | * update the node pointers on the monitors | |
731 | */ | |
732 | for (m = moved; m; m = m->next) { | |
733 | ++movecount; | |
734 | m->node = par; | |
735 | } | |
736 | ||
737 | RFAPI_CHECK_REFCOUNT(par, SAFI_MPLS_VPN, | |
738 | parent_already_refcounted - movecount); | |
739 | while (movecount > parent_already_refcounted) { | |
fe08ba7e | 740 | agg_lock_node(par); |
d62a17ae | 741 | ++parent_already_refcounted; |
742 | } | |
743 | while (movecount < parent_already_refcounted) { | |
744 | /* unlikely, but code defensively */ | |
fe08ba7e | 745 | agg_unlock_node(par); |
d62a17ae | 746 | --parent_already_refcounted; |
747 | } | |
748 | RFAPI_CHECK_REFCOUNT(original_vpn_node, SAFI_MPLS_VPN, | |
749 | movecount + lockoffset); | |
750 | while (movecount--) { | |
fe08ba7e | 751 | agg_unlock_node(original_vpn_node); |
d62a17ae | 752 | } |
65efcfce | 753 | |
1e20238a | 754 | #ifdef DEBUG_MONITOR_MOVE_SHORTER |
d62a17ae | 755 | { |
2dbe669b DA |
756 | vnc_zlog_debug_verbose("%s: moved to node pfx=%pFX", __func__, |
757 | &par->p); | |
d62a17ae | 758 | } |
65efcfce LB |
759 | #endif |
760 | ||
761 | ||
d62a17ae | 762 | return moved; |
65efcfce LB |
763 | } |
764 | ||
765 | /* | |
766 | * Implement MONITOR_MOVE_LONGER(new_node) from | |
767 | * RFAPI-Import-Event-Handling.txt | |
768 | */ | |
fe08ba7e | 769 | static void rfapiMonitorMoveLonger(struct agg_node *new_vpn_node) |
65efcfce | 770 | { |
d62a17ae | 771 | struct rfapi_monitor_vpn *monitor; |
772 | struct rfapi_monitor_vpn *mlast; | |
40381db7 | 773 | struct bgp_path_info *bpi; |
fe08ba7e | 774 | struct agg_node *par; |
26a3ffd6 | 775 | const struct prefix *new_vpn_node_p = agg_node_get_prefix(new_vpn_node); |
d62a17ae | 776 | |
777 | RFAPI_CHECK_REFCOUNT(new_vpn_node, SAFI_MPLS_VPN, 0); | |
778 | ||
779 | /* | |
780 | * Make sure we have at least one valid route at the new node | |
781 | */ | |
40381db7 | 782 | for (bpi = new_vpn_node->info; bpi; bpi = bpi->next) { |
d62a17ae | 783 | struct prefix pfx; |
40381db7 | 784 | if (!rfapiGetUnAddrOfVpnBi(bpi, &pfx)) |
d62a17ae | 785 | break; |
786 | } | |
787 | ||
40381db7 | 788 | if (!bpi) { |
d62a17ae | 789 | vnc_zlog_debug_verbose( |
790 | "%s: no valid routes at node %p, so not attempting moves", | |
791 | __func__, new_vpn_node); | |
792 | return; | |
793 | } | |
794 | ||
795 | /* | |
796 | * Find first parent node that has monitors | |
797 | */ | |
fe08ba7e DS |
798 | for (par = agg_node_parent(new_vpn_node); par; |
799 | par = agg_node_parent(par)) { | |
d62a17ae | 800 | if (RFAPI_MONITOR_VPN(par)) |
801 | break; | |
802 | } | |
803 | ||
804 | if (!par) { | |
805 | vnc_zlog_debug_verbose( | |
806 | "%s: no parent nodes with monitors, done", __func__); | |
807 | return; | |
808 | } | |
809 | ||
810 | /* | |
811 | * Check each of these monitors to see of their longest-match | |
812 | * is now the updated node. Move any such monitors to the more- | |
813 | * specific updated node | |
814 | */ | |
815 | for (mlast = NULL, monitor = RFAPI_MONITOR_VPN(par); monitor;) { | |
d62a17ae | 816 | /* |
817 | * If new longest match for monitor prefix is the new | |
818 | * route's prefix, move monitor to new route's prefix | |
819 | */ | |
26a3ffd6 | 820 | if (prefix_match(new_vpn_node_p, &monitor->p)) { |
d62a17ae | 821 | /* detach */ |
822 | if (mlast) { | |
823 | mlast->next = monitor->next; | |
824 | } else { | |
825 | RFAPI_MONITOR_VPN_W_ALLOC(par) = monitor->next; | |
826 | } | |
827 | ||
828 | ||
829 | /* attach */ | |
830 | monitor->next = RFAPI_MONITOR_VPN(new_vpn_node); | |
831 | RFAPI_MONITOR_VPN_W_ALLOC(new_vpn_node) = monitor; | |
832 | monitor->node = new_vpn_node; | |
833 | ||
fe08ba7e | 834 | agg_lock_node(new_vpn_node); /* incr refcount */ |
d62a17ae | 835 | |
836 | monitor = mlast ? mlast->next : RFAPI_MONITOR_VPN(par); | |
837 | ||
838 | RFAPI_CHECK_REFCOUNT(par, SAFI_MPLS_VPN, 1); | |
839 | /* decr refcount after we're done with par as this might | |
840 | * free it */ | |
fe08ba7e | 841 | agg_unlock_node(par); |
d62a17ae | 842 | |
843 | continue; | |
844 | } | |
845 | mlast = monitor; | |
846 | monitor = monitor->next; | |
847 | } | |
848 | ||
849 | RFAPI_CHECK_REFCOUNT(new_vpn_node, SAFI_MPLS_VPN, 0); | |
65efcfce LB |
850 | } |
851 | ||
852 | ||
40381db7 | 853 | static void rfapiBgpInfoChainFree(struct bgp_path_info *bpi) |
65efcfce | 854 | { |
4b7e6066 | 855 | struct bgp_path_info *next; |
d62a17ae | 856 | |
40381db7 | 857 | while (bpi) { |
d62a17ae | 858 | |
859 | /* | |
40381db7 | 860 | * If there is a timer waiting to delete this bpi, cancel |
d62a17ae | 861 | * the timer and delete immediately |
862 | */ | |
40381db7 DS |
863 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
864 | && bpi->extra->vnc.import.timer) { | |
c3aaa89a DS |
865 | struct rfapi_withdraw *wcb = |
866 | THREAD_ARG(bpi->extra->vnc.import.timer); | |
d62a17ae | 867 | |
868 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
c3aaa89a | 869 | THREAD_OFF(bpi->extra->vnc.import.timer); |
d62a17ae | 870 | } |
871 | ||
40381db7 DS |
872 | next = bpi->next; |
873 | bpi->next = NULL; | |
874 | rfapiBgpInfoFree(bpi); | |
875 | bpi = next; | |
d62a17ae | 876 | } |
65efcfce LB |
877 | } |
878 | ||
d62a17ae | 879 | static void rfapiImportTableFlush(struct rfapi_import_table *it) |
65efcfce | 880 | { |
d62a17ae | 881 | afi_t afi; |
882 | ||
883 | /* | |
884 | * Free ecommunity | |
885 | */ | |
886 | ecommunity_free(&it->rt_import_list); | |
887 | it->rt_import_list = NULL; | |
888 | ||
889 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
890 | ||
fe08ba7e | 891 | struct agg_node *rn; |
d62a17ae | 892 | |
fe08ba7e DS |
893 | for (rn = agg_route_top(it->imported_vpn[afi]); rn; |
894 | rn = agg_route_next(rn)) { | |
d62a17ae | 895 | /* |
896 | * Each route_node has: | |
897 | * aggregate: points to rfapi_it_extra with monitor | |
898 | * chain(s) | |
9b6d8fcf | 899 | * info: points to chain of bgp_path_info |
d62a17ae | 900 | */ |
9b6d8fcf | 901 | /* free bgp_path_info and its children */ |
d62a17ae | 902 | rfapiBgpInfoChainFree(rn->info); |
903 | rn->info = NULL; | |
904 | ||
905 | rfapiMonitorExtraFlush(SAFI_MPLS_VPN, rn); | |
906 | } | |
907 | ||
fe08ba7e DS |
908 | for (rn = agg_route_top(it->imported_encap[afi]); rn; |
909 | rn = agg_route_next(rn)) { | |
9b6d8fcf | 910 | /* free bgp_path_info and its children */ |
d62a17ae | 911 | rfapiBgpInfoChainFree(rn->info); |
912 | rn->info = NULL; | |
913 | ||
914 | rfapiMonitorExtraFlush(SAFI_ENCAP, rn); | |
915 | } | |
916 | ||
fe08ba7e DS |
917 | agg_table_finish(it->imported_vpn[afi]); |
918 | agg_table_finish(it->imported_encap[afi]); | |
d62a17ae | 919 | } |
920 | if (it->monitor_exterior_orphans) { | |
921 | skiplist_free(it->monitor_exterior_orphans); | |
922 | } | |
65efcfce LB |
923 | } |
924 | ||
d62a17ae | 925 | void rfapiImportTableRefDelByIt(struct bgp *bgp, |
926 | struct rfapi_import_table *it_target) | |
65efcfce | 927 | { |
d62a17ae | 928 | struct rfapi *h; |
929 | struct rfapi_import_table *it; | |
930 | struct rfapi_import_table *prev = NULL; | |
931 | ||
932 | assert(it_target); | |
933 | ||
934 | h = bgp->rfapi; | |
935 | assert(h); | |
936 | ||
937 | for (it = h->imports; it; prev = it, it = it->next) { | |
938 | if (it == it_target) | |
939 | break; | |
940 | } | |
941 | ||
942 | assert(it); | |
943 | assert(it->refcount); | |
944 | ||
945 | it->refcount -= 1; | |
946 | ||
947 | if (!it->refcount) { | |
948 | if (prev) { | |
949 | prev->next = it->next; | |
950 | } else { | |
951 | h->imports = it->next; | |
952 | } | |
953 | rfapiImportTableFlush(it); | |
954 | XFREE(MTYPE_RFAPI_IMPORTTABLE, it); | |
955 | } | |
65efcfce LB |
956 | } |
957 | ||
1e20238a | 958 | #ifdef RFAPI_REQUIRE_ENCAP_BEEC |
65efcfce LB |
959 | /* |
960 | * Look for magic BGP Encapsulation Extended Community value | |
961 | * Format in RFC 5512 Sect. 4.5 | |
962 | */ | |
d62a17ae | 963 | static int rfapiEcommunitiesMatchBeec(struct ecommunity *ecom, |
964 | bgp_encap_types type) | |
65efcfce | 965 | { |
d62a17ae | 966 | int i; |
65efcfce | 967 | |
d62a17ae | 968 | if (!ecom) |
969 | return 0; | |
65efcfce | 970 | |
d62a17ae | 971 | for (i = 0; i < (ecom->size * ECOMMUNITY_SIZE); i += ECOMMUNITY_SIZE) { |
65efcfce | 972 | |
d62a17ae | 973 | uint8_t *ep; |
65efcfce | 974 | |
d62a17ae | 975 | ep = ecom->val + i; |
65efcfce | 976 | |
d62a17ae | 977 | if (ep[0] == ECOMMUNITY_ENCODE_OPAQUE |
978 | && ep[1] == ECOMMUNITY_OPAQUE_SUBTYPE_ENCAP | |
979 | && ep[6] == ((type && 0xff00) >> 8) | |
980 | && ep[7] == (type & 0xff)) { | |
65efcfce | 981 | |
d62a17ae | 982 | return 1; |
983 | } | |
984 | } | |
985 | return 0; | |
65efcfce LB |
986 | } |
987 | #endif | |
988 | ||
d62a17ae | 989 | int rfapiEcommunitiesIntersect(struct ecommunity *e1, struct ecommunity *e2) |
65efcfce | 990 | { |
f6e07e1b | 991 | uint32_t i, j; |
d62a17ae | 992 | |
993 | if (!e1 || !e2) | |
994 | return 0; | |
995 | ||
996 | { | |
997 | char *s1, *s2; | |
998 | s1 = ecommunity_ecom2str(e1, ECOMMUNITY_FORMAT_DISPLAY, 0); | |
999 | s2 = ecommunity_ecom2str(e2, ECOMMUNITY_FORMAT_DISPLAY, 0); | |
1000 | vnc_zlog_debug_verbose("%s: e1[%s], e2[%s]", __func__, s1, s2); | |
1001 | XFREE(MTYPE_ECOMMUNITY_STR, s1); | |
1002 | XFREE(MTYPE_ECOMMUNITY_STR, s2); | |
1003 | } | |
1004 | ||
1005 | for (i = 0; i < e1->size; ++i) { | |
1006 | for (j = 0; j < e2->size; ++j) { | |
1007 | if (!memcmp(e1->val + (i * ECOMMUNITY_SIZE), | |
1008 | e2->val + (j * ECOMMUNITY_SIZE), | |
1009 | ECOMMUNITY_SIZE)) { | |
1010 | ||
1011 | return 1; | |
1012 | } | |
1013 | } | |
1014 | } | |
1015 | return 0; | |
65efcfce LB |
1016 | } |
1017 | ||
d62a17ae | 1018 | int rfapiEcommunityGetLNI(struct ecommunity *ecom, uint32_t *lni) |
65efcfce | 1019 | { |
d62a17ae | 1020 | if (ecom) { |
f6e07e1b DS |
1021 | uint32_t i; |
1022 | ||
d62a17ae | 1023 | for (i = 0; i < ecom->size; ++i) { |
1024 | uint8_t *p = ecom->val + (i * ECOMMUNITY_SIZE); | |
1025 | ||
1026 | if ((*(p + 0) == 0x00) && (*(p + 1) == 0x02)) { | |
1027 | ||
1028 | *lni = (*(p + 5) << 16) | (*(p + 6) << 8) | |
1029 | | (*(p + 7)); | |
1030 | return 0; | |
1031 | } | |
1032 | } | |
1033 | } | |
1034 | return ENOENT; | |
65efcfce LB |
1035 | } |
1036 | ||
d62a17ae | 1037 | int rfapiEcommunityGetEthernetTag(struct ecommunity *ecom, uint16_t *tag_id) |
79799987 | 1038 | { |
d62a17ae | 1039 | struct bgp *bgp = bgp_get_default(); |
1040 | *tag_id = 0; /* default to untagged */ | |
1041 | if (ecom) { | |
f6e07e1b DS |
1042 | uint32_t i; |
1043 | ||
d62a17ae | 1044 | for (i = 0; i < ecom->size; ++i) { |
1045 | as_t as = 0; | |
1046 | int encode = 0; | |
1be1693e | 1047 | const uint8_t *p = ecom->val + (i * ECOMMUNITY_SIZE); |
d62a17ae | 1048 | |
1049 | /* High-order octet of type. */ | |
1050 | encode = *p++; | |
1051 | ||
1052 | if (*p++ == ECOMMUNITY_ROUTE_TARGET) { | |
1053 | if (encode == ECOMMUNITY_ENCODE_AS4) { | |
937652c6 | 1054 | p = ptr_get_be32(p, &as); |
d62a17ae | 1055 | } else if (encode == ECOMMUNITY_ENCODE_AS) { |
1056 | as = (*p++ << 8); | |
1057 | as |= (*p++); | |
996c9314 LB |
1058 | p += 2; /* skip next two, tag/vid |
1059 | always in lowest bytes */ | |
d62a17ae | 1060 | } |
1061 | if (as == bgp->as) { | |
1062 | *tag_id = *p++ << 8; | |
1063 | *tag_id |= (*p++); | |
1064 | return 0; | |
1065 | } | |
1066 | } | |
1067 | } | |
1068 | } | |
1069 | return ENOENT; | |
79799987 LB |
1070 | } |
1071 | ||
40381db7 | 1072 | static int rfapiVpnBiNhEqualsPt(struct bgp_path_info *bpi, |
4b7e6066 | 1073 | struct rfapi_ip_addr *hpt) |
65efcfce | 1074 | { |
d62a17ae | 1075 | uint8_t family; |
65efcfce | 1076 | |
40381db7 | 1077 | if (!hpt || !bpi) |
d62a17ae | 1078 | return 0; |
65efcfce | 1079 | |
40381db7 | 1080 | family = BGP_MP_NEXTHOP_FAMILY(bpi->attr->mp_nexthop_len); |
65efcfce | 1081 | |
d62a17ae | 1082 | if (hpt->addr_family != family) |
1083 | return 0; | |
65efcfce | 1084 | |
d62a17ae | 1085 | switch (family) { |
1086 | case AF_INET: | |
40381db7 | 1087 | if (bpi->attr->mp_nexthop_global_in.s_addr |
d62a17ae | 1088 | != hpt->addr.v4.s_addr) |
1089 | return 0; | |
1090 | break; | |
65efcfce | 1091 | |
d62a17ae | 1092 | case AF_INET6: |
40381db7 | 1093 | if (IPV6_ADDR_CMP(&bpi->attr->mp_nexthop_global, &hpt->addr.v6)) |
d62a17ae | 1094 | return 0; |
1095 | break; | |
65efcfce | 1096 | |
d62a17ae | 1097 | default: |
1098 | return 0; | |
d62a17ae | 1099 | } |
65efcfce | 1100 | |
d62a17ae | 1101 | return 1; |
65efcfce LB |
1102 | } |
1103 | ||
1104 | ||
1105 | /* | |
1106 | * Compare 2 VPN BIs. Return true if they have the same VN and UN addresses | |
1107 | */ | |
40381db7 DS |
1108 | static int rfapiVpnBiSamePtUn(struct bgp_path_info *bpi1, |
1109 | struct bgp_path_info *bpi2) | |
65efcfce | 1110 | { |
d62a17ae | 1111 | struct prefix pfx_un1; |
1112 | struct prefix pfx_un2; | |
1113 | ||
40381db7 | 1114 | if (!bpi1 || !bpi2) |
d62a17ae | 1115 | return 0; |
1116 | ||
d62a17ae | 1117 | /* |
1118 | * VN address comparisons | |
1119 | */ | |
1120 | ||
40381db7 DS |
1121 | if (BGP_MP_NEXTHOP_FAMILY(bpi1->attr->mp_nexthop_len) |
1122 | != BGP_MP_NEXTHOP_FAMILY(bpi2->attr->mp_nexthop_len)) { | |
d62a17ae | 1123 | return 0; |
1124 | } | |
1125 | ||
40381db7 | 1126 | switch (BGP_MP_NEXTHOP_FAMILY(bpi1->attr->mp_nexthop_len)) { |
d62a17ae | 1127 | case AF_INET: |
40381db7 DS |
1128 | if (bpi1->attr->mp_nexthop_global_in.s_addr |
1129 | != bpi2->attr->mp_nexthop_global_in.s_addr) | |
d62a17ae | 1130 | return 0; |
1131 | break; | |
1132 | ||
1133 | case AF_INET6: | |
40381db7 DS |
1134 | if (IPV6_ADDR_CMP(&bpi1->attr->mp_nexthop_global, |
1135 | &bpi2->attr->mp_nexthop_global)) | |
d62a17ae | 1136 | return 0; |
1137 | break; | |
1138 | ||
1139 | default: | |
1140 | return 0; | |
d62a17ae | 1141 | } |
1142 | ||
fa3bf3a2 MS |
1143 | memset(&pfx_un1, 0, sizeof(pfx_un1)); |
1144 | memset(&pfx_un2, 0, sizeof(pfx_un2)); | |
1145 | ||
d62a17ae | 1146 | /* |
1147 | * UN address comparisons | |
1148 | */ | |
40381db7 DS |
1149 | if (rfapiGetVncTunnelUnAddr(bpi1->attr, &pfx_un1)) { |
1150 | if (bpi1->extra) { | |
1151 | pfx_un1.family = bpi1->extra->vnc.import.un_family; | |
1152 | switch (bpi1->extra->vnc.import.un_family) { | |
d62a17ae | 1153 | case AF_INET: |
1154 | pfx_un1.u.prefix4 = | |
40381db7 | 1155 | bpi1->extra->vnc.import.un.addr4; |
d62a17ae | 1156 | break; |
1157 | case AF_INET6: | |
1158 | pfx_un1.u.prefix6 = | |
40381db7 | 1159 | bpi1->extra->vnc.import.un.addr6; |
d62a17ae | 1160 | break; |
1161 | default: | |
c7ca5ccf | 1162 | pfx_un1.family = AF_UNSPEC; |
d62a17ae | 1163 | break; |
1164 | } | |
1165 | } | |
1166 | } | |
1167 | ||
40381db7 DS |
1168 | if (rfapiGetVncTunnelUnAddr(bpi2->attr, &pfx_un2)) { |
1169 | if (bpi2->extra) { | |
1170 | pfx_un2.family = bpi2->extra->vnc.import.un_family; | |
1171 | switch (bpi2->extra->vnc.import.un_family) { | |
d62a17ae | 1172 | case AF_INET: |
1173 | pfx_un2.u.prefix4 = | |
40381db7 | 1174 | bpi2->extra->vnc.import.un.addr4; |
d62a17ae | 1175 | break; |
1176 | case AF_INET6: | |
1177 | pfx_un2.u.prefix6 = | |
40381db7 | 1178 | bpi2->extra->vnc.import.un.addr6; |
d62a17ae | 1179 | break; |
1180 | default: | |
c7ca5ccf | 1181 | pfx_un2.family = AF_UNSPEC; |
d62a17ae | 1182 | break; |
1183 | } | |
1184 | } | |
1185 | } | |
1186 | ||
c7ca5ccf | 1187 | if (pfx_un1.family == AF_UNSPEC || pfx_un2.family == AF_UNSPEC) |
d62a17ae | 1188 | return 0; |
1189 | ||
1190 | if (pfx_un1.family != pfx_un2.family) | |
1191 | return 0; | |
1192 | ||
1193 | switch (pfx_un1.family) { | |
1194 | case AF_INET: | |
996c9314 | 1195 | if (!IPV4_ADDR_SAME(&pfx_un1.u.prefix4, &pfx_un2.u.prefix4)) |
d62a17ae | 1196 | return 0; |
1197 | break; | |
1198 | case AF_INET6: | |
1199 | if (!IPV6_ADDR_SAME(&pfx_un1.u.prefix6, &pfx_un2.u.prefix6)) | |
1200 | return 0; | |
1201 | break; | |
1202 | } | |
1203 | ||
1204 | ||
1205 | return 1; | |
65efcfce LB |
1206 | } |
1207 | ||
d62a17ae | 1208 | uint8_t rfapiRfpCost(struct attr *attr) |
65efcfce | 1209 | { |
d62a17ae | 1210 | if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF)) { |
1211 | if (attr->local_pref > 255) { | |
1212 | return 0; | |
1213 | } | |
1214 | return 255 - attr->local_pref; | |
1215 | } | |
1216 | ||
1217 | return 255; | |
65efcfce LB |
1218 | } |
1219 | ||
1220 | /*------------------------------------------ | |
1221 | * rfapi_extract_l2o | |
1222 | * | |
d62a17ae | 1223 | * Find Layer 2 options in an option chain |
65efcfce | 1224 | * |
d62a17ae | 1225 | * input: |
65efcfce LB |
1226 | * pHop option chain |
1227 | * | |
1228 | * output: | |
1229 | * l2o layer 2 options extracted | |
1230 | * | |
1231 | * return value: | |
1232 | * 0 OK | |
1233 | * 1 no options found | |
1234 | * | |
1235 | --------------------------------------------*/ | |
d62a17ae | 1236 | int rfapi_extract_l2o( |
1237 | struct bgp_tea_options *pHop, /* chain of options */ | |
1238 | struct rfapi_l2address_option *l2o) /* return extracted value */ | |
65efcfce | 1239 | { |
d62a17ae | 1240 | struct bgp_tea_options *p; |
65efcfce | 1241 | |
d62a17ae | 1242 | for (p = pHop; p; p = p->next) { |
1243 | if ((p->type == RFAPI_VN_OPTION_TYPE_L2ADDR) | |
1244 | && (p->length >= 8)) { | |
65efcfce | 1245 | |
d62a17ae | 1246 | char *v = p->value; |
65efcfce | 1247 | |
d62a17ae | 1248 | memcpy(&l2o->macaddr, v, 6); |
65efcfce | 1249 | |
d62a17ae | 1250 | l2o->label = ((v[6] << 12) & 0xff000) |
1251 | + ((v[7] << 4) & 0xff0) | |
1252 | + ((v[8] >> 4) & 0xf); | |
65efcfce | 1253 | |
d62a17ae | 1254 | l2o->local_nve_id = (uint8_t)v[10]; |
65efcfce | 1255 | |
d62a17ae | 1256 | l2o->logical_net_id = |
1257 | (v[11] << 16) + (v[12] << 8) + (v[13] << 0); | |
65efcfce | 1258 | |
d62a17ae | 1259 | return 0; |
1260 | } | |
1261 | } | |
1262 | return 1; | |
65efcfce LB |
1263 | } |
1264 | ||
1265 | static struct rfapi_next_hop_entry * | |
d62a17ae | 1266 | rfapiRouteInfo2NextHopEntry(struct rfapi_ip_prefix *rprefix, |
40381db7 DS |
1267 | struct bgp_path_info *bpi, /* route to encode */ |
1268 | uint32_t lifetime, /* use this in nhe */ | |
1269 | struct agg_node *rn) /* req for L2 eth addr */ | |
65efcfce | 1270 | { |
d62a17ae | 1271 | struct rfapi_next_hop_entry *new; |
1272 | int have_vnc_tunnel_un = 0; | |
26a3ffd6 | 1273 | const struct prefix *p = agg_node_get_prefix(rn); |
65efcfce | 1274 | |
1e20238a | 1275 | #ifdef DEBUG_ENCAP_MONITOR |
40381db7 | 1276 | vnc_zlog_debug_verbose("%s: entry, bpi %p, rn %p", __func__, bpi, rn); |
65efcfce LB |
1277 | #endif |
1278 | ||
d62a17ae | 1279 | new = XCALLOC(MTYPE_RFAPI_NEXTHOP, sizeof(struct rfapi_next_hop_entry)); |
d62a17ae | 1280 | |
1281 | new->prefix = *rprefix; | |
1282 | ||
40381db7 DS |
1283 | if (bpi->extra |
1284 | && decode_rd_type(bpi->extra->vnc.import.rd.val) | |
d62a17ae | 1285 | == RD_TYPE_VNC_ETH) { |
1286 | /* ethernet */ | |
1287 | ||
1288 | struct rfapi_vn_option *vo; | |
1289 | ||
1290 | vo = XCALLOC(MTYPE_RFAPI_VN_OPTION, | |
1291 | sizeof(struct rfapi_vn_option)); | |
d62a17ae | 1292 | |
1293 | vo->type = RFAPI_VN_OPTION_TYPE_L2ADDR; | |
1294 | ||
26a3ffd6 | 1295 | memcpy(&vo->v.l2addr.macaddr, &p->u.prefix_eth.octet, ETH_ALEN); |
d62a17ae | 1296 | /* only low 3 bytes of this are significant */ |
b53e67a3 | 1297 | (void)rfapiEcommunityGetLNI(bgp_attr_get_ecommunity(bpi->attr), |
05864da7 | 1298 | &vo->v.l2addr.logical_net_id); |
b53e67a3 DA |
1299 | (void)rfapiEcommunityGetEthernetTag( |
1300 | bgp_attr_get_ecommunity(bpi->attr), | |
1301 | &vo->v.l2addr.tag_id); | |
d62a17ae | 1302 | |
1303 | /* local_nve_id comes from lower byte of RD type */ | |
40381db7 | 1304 | vo->v.l2addr.local_nve_id = bpi->extra->vnc.import.rd.val[1]; |
d62a17ae | 1305 | |
1306 | /* label comes from MP_REACH_NLRI label */ | |
40381db7 | 1307 | vo->v.l2addr.label = decode_label(&bpi->extra->label[0]); |
d62a17ae | 1308 | |
1309 | new->vn_options = vo; | |
1310 | ||
1311 | /* | |
1312 | * If there is an auxiliary prefix (i.e., host IP address), | |
1313 | * use it as the nexthop prefix instead of the query prefix | |
1314 | */ | |
40381db7 DS |
1315 | if (bpi->extra->vnc.import.aux_prefix.family) { |
1316 | rfapiQprefix2Rprefix(&bpi->extra->vnc.import.aux_prefix, | |
d62a17ae | 1317 | &new->prefix); |
1318 | } | |
1319 | } | |
1320 | ||
05864da7 DS |
1321 | bgp_encap_types tun_type = BGP_ENCAP_TYPE_MPLS; /*Default*/ |
1322 | new->prefix.cost = rfapiRfpCost(bpi->attr); | |
d62a17ae | 1323 | |
05864da7 | 1324 | struct bgp_attr_encap_subtlv *pEncap; |
d62a17ae | 1325 | |
05864da7 DS |
1326 | switch (BGP_MP_NEXTHOP_FAMILY(bpi->attr->mp_nexthop_len)) { |
1327 | case AF_INET: | |
1328 | new->vn_address.addr_family = AF_INET; | |
1329 | new->vn_address.addr.v4 = bpi->attr->mp_nexthop_global_in; | |
1330 | break; | |
d62a17ae | 1331 | |
05864da7 DS |
1332 | case AF_INET6: |
1333 | new->vn_address.addr_family = AF_INET6; | |
1334 | new->vn_address.addr.v6 = bpi->attr->mp_nexthop_global; | |
1335 | break; | |
d62a17ae | 1336 | |
05864da7 DS |
1337 | default: |
1338 | zlog_warn("%s: invalid vpn nexthop length: %d", __func__, | |
1339 | bpi->attr->mp_nexthop_len); | |
1340 | rfapi_free_next_hop_list(new); | |
1341 | return NULL; | |
1342 | } | |
d62a17ae | 1343 | |
91ebf12c DS |
1344 | for (pEncap = bgp_attr_get_vnc_subtlvs(bpi->attr); pEncap; |
1345 | pEncap = pEncap->next) { | |
05864da7 DS |
1346 | switch (pEncap->type) { |
1347 | case BGP_VNC_SUBTLV_TYPE_LIFETIME: | |
1348 | /* use configured lifetime, not attr lifetime */ | |
1349 | break; | |
d62a17ae | 1350 | |
05864da7 DS |
1351 | default: |
1352 | zlog_warn("%s: unknown VNC option type %d", __func__, | |
1353 | pEncap->type); | |
d62a17ae | 1354 | |
05864da7 | 1355 | break; |
d62a17ae | 1356 | } |
05864da7 | 1357 | } |
d62a17ae | 1358 | |
05864da7 DS |
1359 | bgp_attr_extcom_tunnel_type(bpi->attr, &tun_type); |
1360 | if (tun_type == BGP_ENCAP_TYPE_MPLS) { | |
1361 | struct prefix p; | |
1362 | /* MPLS carries UN address in next hop */ | |
1363 | rfapiNexthop2Prefix(bpi->attr, &p); | |
c7ca5ccf | 1364 | if (p.family != AF_UNSPEC) { |
05864da7 DS |
1365 | rfapiQprefix2Raddr(&p, &new->un_address); |
1366 | have_vnc_tunnel_un = 1; | |
d62a17ae | 1367 | } |
05864da7 | 1368 | } |
d62a17ae | 1369 | |
05864da7 DS |
1370 | for (pEncap = bpi->attr->encap_subtlvs; pEncap; pEncap = pEncap->next) { |
1371 | switch (pEncap->type) { | |
1372 | case BGP_ENCAP_SUBTLV_TYPE_REMOTE_ENDPOINT: | |
1373 | /* | |
1374 | * Overrides ENCAP UN address, if any | |
1375 | */ | |
1376 | switch (pEncap->length) { | |
d62a17ae | 1377 | |
05864da7 DS |
1378 | case 8: |
1379 | new->un_address.addr_family = AF_INET; | |
1380 | memcpy(&new->un_address.addr.v4, pEncap->value, | |
1381 | 4); | |
1382 | have_vnc_tunnel_un = 1; | |
1383 | break; | |
d62a17ae | 1384 | |
05864da7 DS |
1385 | case 20: |
1386 | new->un_address.addr_family = AF_INET6; | |
1387 | memcpy(&new->un_address.addr.v6, pEncap->value, | |
1388 | 16); | |
1389 | have_vnc_tunnel_un = 1; | |
d62a17ae | 1390 | break; |
1391 | ||
1392 | default: | |
1393 | zlog_warn( | |
05864da7 DS |
1394 | "%s: invalid tunnel subtlv UN addr length (%d) for bpi %p", |
1395 | __func__, pEncap->length, bpi); | |
d62a17ae | 1396 | } |
05864da7 DS |
1397 | break; |
1398 | ||
1399 | default: | |
1400 | zlog_warn("%s: unknown Encap Attribute option type %d", | |
1401 | __func__, pEncap->type); | |
1402 | break; | |
d62a17ae | 1403 | } |
05864da7 | 1404 | } |
d62a17ae | 1405 | |
05864da7 | 1406 | new->un_options = rfapi_encap_tlv_to_un_option(bpi->attr); |
65efcfce | 1407 | |
1e20238a | 1408 | #ifdef DEBUG_ENCAP_MONITOR |
05864da7 DS |
1409 | vnc_zlog_debug_verbose("%s: line %d: have_vnc_tunnel_un=%d", __func__, |
1410 | __LINE__, have_vnc_tunnel_un); | |
65efcfce LB |
1411 | #endif |
1412 | ||
05864da7 DS |
1413 | if (!have_vnc_tunnel_un && bpi->extra) { |
1414 | /* | |
1415 | * use cached UN address from ENCAP route | |
1416 | */ | |
1417 | new->un_address.addr_family = bpi->extra->vnc.import.un_family; | |
1418 | switch (new->un_address.addr_family) { | |
1419 | case AF_INET: | |
1420 | new->un_address.addr.v4 = | |
1421 | bpi->extra->vnc.import.un.addr4; | |
1422 | break; | |
1423 | case AF_INET6: | |
1424 | new->un_address.addr.v6 = | |
1425 | bpi->extra->vnc.import.un.addr6; | |
1426 | break; | |
1427 | default: | |
1428 | zlog_warn("%s: invalid UN addr family (%d) for bpi %p", | |
1429 | __func__, new->un_address.addr_family, bpi); | |
1430 | rfapi_free_next_hop_list(new); | |
1431 | return NULL; | |
d62a17ae | 1432 | } |
1433 | } | |
1434 | ||
1435 | new->lifetime = lifetime; | |
1436 | return new; | |
65efcfce LB |
1437 | } |
1438 | ||
fe08ba7e | 1439 | int rfapiHasNonRemovedRoutes(struct agg_node *rn) |
65efcfce | 1440 | { |
40381db7 | 1441 | struct bgp_path_info *bpi; |
65efcfce | 1442 | |
40381db7 | 1443 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 1444 | struct prefix pfx; |
65efcfce | 1445 | |
40381db7 DS |
1446 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
1447 | && (bpi->extra && !rfapiGetUnAddrOfVpnBi(bpi, &pfx))) { | |
65efcfce | 1448 | |
d62a17ae | 1449 | return 1; |
1450 | } | |
1451 | } | |
1452 | return 0; | |
65efcfce LB |
1453 | } |
1454 | ||
1e20238a | 1455 | #ifdef DEBUG_IT_NODES |
d62a17ae | 1456 | /* |
65efcfce LB |
1457 | * DEBUG FUNCTION |
1458 | */ | |
fe08ba7e | 1459 | void rfapiDumpNode(struct agg_node *rn) |
65efcfce | 1460 | { |
40381db7 | 1461 | struct bgp_path_info *bpi; |
d62a17ae | 1462 | |
1463 | vnc_zlog_debug_verbose("%s: rn=%p", __func__, rn); | |
40381db7 | 1464 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 1465 | struct prefix pfx; |
40381db7 | 1466 | int ctrc = rfapiGetUnAddrOfVpnBi(bpi, &pfx); |
d62a17ae | 1467 | int nr; |
1468 | ||
40381db7 DS |
1469 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
1470 | && (bpi->extra && !ctrc)) { | |
d62a17ae | 1471 | |
1472 | nr = 1; | |
1473 | } else { | |
1474 | nr = 0; | |
1475 | } | |
1476 | ||
1477 | vnc_zlog_debug_verbose( | |
40381db7 DS |
1478 | " bpi=%p, nr=%d, flags=0x%x, extra=%p, ctrc=%d", bpi, |
1479 | nr, bpi->flags, bpi->extra, ctrc); | |
d62a17ae | 1480 | } |
65efcfce LB |
1481 | } |
1482 | #endif | |
1483 | ||
d62a17ae | 1484 | static int rfapiNhlAddNodeRoutes( |
fe08ba7e | 1485 | struct agg_node *rn, /* in */ |
d62a17ae | 1486 | struct rfapi_ip_prefix *rprefix, /* in */ |
1487 | uint32_t lifetime, /* in */ | |
1488 | int removed, /* in */ | |
1489 | struct rfapi_next_hop_entry **head, /* in/out */ | |
1490 | struct rfapi_next_hop_entry **tail, /* in/out */ | |
1491 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
fe08ba7e | 1492 | struct agg_node *rfd_rib_node, /* preload this NVE rib node */ |
d62a17ae | 1493 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1494 | { |
40381db7 | 1495 | struct bgp_path_info *bpi; |
d62a17ae | 1496 | struct rfapi_next_hop_entry *new; |
1497 | struct prefix pfx_un; | |
1498 | struct skiplist *seen_nexthops; | |
1499 | int count = 0; | |
26a3ffd6 DS |
1500 | const struct prefix *p = agg_node_get_prefix(rn); |
1501 | int is_l2 = (p->family == AF_ETHERNET); | |
d62a17ae | 1502 | |
fe08ba7e DS |
1503 | if (rfd_rib_node) { |
1504 | struct agg_table *atable = agg_get_table(rfd_rib_node); | |
84cc1207 PZ |
1505 | struct rfapi_descriptor *rfd; |
1506 | ||
fe08ba7e DS |
1507 | if (atable) { |
1508 | rfd = agg_get_table_info(atable); | |
84cc1207 | 1509 | |
fe08ba7e DS |
1510 | if (rfapiRibFTDFilterRecentPrefix(rfd, rn, |
1511 | pfx_target_original)) | |
1512 | return 0; | |
1513 | } | |
d62a17ae | 1514 | } |
1515 | ||
1516 | seen_nexthops = | |
63265b5c | 1517 | skiplist_new(0, vnc_prefix_cmp, prefix_free_lists); |
d62a17ae | 1518 | |
40381db7 | 1519 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 1520 | |
1521 | struct prefix pfx_vn; | |
1522 | struct prefix *newpfx; | |
1523 | ||
40381db7 | 1524 | if (removed && !CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
1e20238a | 1525 | #ifdef DEBUG_RETURNED_NHL |
d62a17ae | 1526 | vnc_zlog_debug_verbose( |
1527 | "%s: want holddown, this route not holddown, skip", | |
1528 | __func__); | |
65efcfce | 1529 | #endif |
d62a17ae | 1530 | continue; |
1531 | } | |
40381db7 | 1532 | if (!removed && CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
d62a17ae | 1533 | continue; |
1534 | } | |
1535 | ||
40381db7 | 1536 | if (!bpi->extra) { |
d62a17ae | 1537 | continue; |
1538 | } | |
1539 | ||
1540 | /* | |
1541 | * Check for excluded VN address | |
1542 | */ | |
40381db7 | 1543 | if (rfapiVpnBiNhEqualsPt(bpi, exclude_vnaddr)) |
d62a17ae | 1544 | continue; |
1545 | ||
1546 | /* | |
1547 | * Check for VN address (nexthop) copied already | |
1548 | */ | |
1549 | if (is_l2) { | |
1550 | /* L2 routes: semantic nexthop in aux_prefix; VN addr | |
1551 | * ain't it */ | |
40381db7 | 1552 | pfx_vn = bpi->extra->vnc.import.aux_prefix; |
d62a17ae | 1553 | } else { |
40381db7 | 1554 | rfapiNexthop2Prefix(bpi->attr, &pfx_vn); |
d62a17ae | 1555 | } |
1556 | if (!skiplist_search(seen_nexthops, &pfx_vn, NULL)) { | |
1e20238a | 1557 | #ifdef DEBUG_RETURNED_NHL |
d62a17ae | 1558 | vnc_zlog_debug_verbose( |
2dbe669b DA |
1559 | "%s: already put VN/nexthop %pFX, skip", |
1560 | __func__, &pfx_vn); | |
65efcfce | 1561 | #endif |
d62a17ae | 1562 | continue; |
1563 | } | |
65efcfce | 1564 | |
40381db7 | 1565 | if (rfapiGetUnAddrOfVpnBi(bpi, &pfx_un)) { |
1e20238a | 1566 | #ifdef DEBUG_ENCAP_MONITOR |
d62a17ae | 1567 | vnc_zlog_debug_verbose( |
40381db7 | 1568 | "%s: failed to get UN address of this VPN bpi", |
d62a17ae | 1569 | __func__); |
65efcfce | 1570 | #endif |
d62a17ae | 1571 | continue; |
1572 | } | |
1573 | ||
1574 | newpfx = prefix_new(); | |
1575 | *newpfx = pfx_vn; | |
1576 | skiplist_insert(seen_nexthops, newpfx, newpfx); | |
1577 | ||
40381db7 | 1578 | new = rfapiRouteInfo2NextHopEntry(rprefix, bpi, lifetime, rn); |
d62a17ae | 1579 | if (new) { |
1580 | if (rfapiRibPreloadBi(rfd_rib_node, &pfx_vn, &pfx_un, | |
40381db7 | 1581 | lifetime, bpi)) { |
d62a17ae | 1582 | /* duplicate filtered by RIB */ |
1583 | rfapi_free_next_hop_list(new); | |
1584 | new = NULL; | |
1585 | } | |
1586 | } | |
1587 | ||
1588 | if (new) { | |
1589 | if (*tail) { | |
1590 | (*tail)->next = new; | |
1591 | } else { | |
1592 | *head = new; | |
1593 | } | |
1594 | *tail = new; | |
1595 | ++count; | |
1596 | } | |
1597 | } | |
1598 | ||
1599 | skiplist_free(seen_nexthops); | |
1600 | ||
1601 | return count; | |
65efcfce LB |
1602 | } |
1603 | ||
1604 | ||
1605 | /* | |
1606 | * Breadth-first | |
1607 | * | |
1608 | * omit_node is meant for the situation where we are adding a subtree | |
1609 | * of a parent of some original requested node. The response already | |
1610 | * contains the original requested node, and we don't want to duplicate | |
1611 | * its routes in the list, so we skip it if the right or left node | |
1612 | * matches (of course, we still travel down its child subtrees). | |
1613 | */ | |
d62a17ae | 1614 | static int rfapiNhlAddSubtree( |
fe08ba7e | 1615 | struct agg_node *rn, /* in */ |
d62a17ae | 1616 | uint32_t lifetime, /* in */ |
1617 | struct rfapi_next_hop_entry **head, /* in/out */ | |
1618 | struct rfapi_next_hop_entry **tail, /* in/out */ | |
fe08ba7e | 1619 | struct agg_node *omit_node, /* in */ |
d62a17ae | 1620 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ |
fe08ba7e | 1621 | struct agg_table *rfd_rib_table, /* preload here */ |
d62a17ae | 1622 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1623 | { |
d62a17ae | 1624 | struct rfapi_ip_prefix rprefix; |
1625 | int rcount = 0; | |
1626 | ||
1627 | /* FIXME: need to find a better way here to work without sticking our | |
1628 | * hands in node->link */ | |
fe08ba7e DS |
1629 | if (agg_node_left(rn) && agg_node_left(rn) != omit_node) { |
1630 | if (agg_node_left(rn)->info) { | |
26a3ffd6 DS |
1631 | const struct prefix *p = |
1632 | agg_node_get_prefix(agg_node_left(rn)); | |
d62a17ae | 1633 | int count = 0; |
fe08ba7e | 1634 | struct agg_node *rib_rn = NULL; |
d62a17ae | 1635 | |
26a3ffd6 DS |
1636 | rfapiQprefix2Rprefix(p, &rprefix); |
1637 | if (rfd_rib_table) | |
1638 | rib_rn = agg_node_get(rfd_rib_table, p); | |
d62a17ae | 1639 | |
1640 | count = rfapiNhlAddNodeRoutes( | |
fe08ba7e DS |
1641 | agg_node_left(rn), &rprefix, lifetime, 0, head, |
1642 | tail, exclude_vnaddr, rib_rn, | |
1643 | pfx_target_original); | |
d62a17ae | 1644 | if (!count) { |
1645 | count = rfapiNhlAddNodeRoutes( | |
fe08ba7e DS |
1646 | agg_node_left(rn), &rprefix, lifetime, |
1647 | 1, head, tail, exclude_vnaddr, rib_rn, | |
d62a17ae | 1648 | pfx_target_original); |
1649 | } | |
1650 | rcount += count; | |
1651 | if (rib_rn) | |
fe08ba7e | 1652 | agg_unlock_node(rib_rn); |
d62a17ae | 1653 | } |
1654 | } | |
1655 | ||
fe08ba7e DS |
1656 | if (agg_node_right(rn) && agg_node_right(rn) != omit_node) { |
1657 | if (agg_node_right(rn)->info) { | |
26a3ffd6 DS |
1658 | const struct prefix *p = |
1659 | agg_node_get_prefix(agg_node_right(rn)); | |
d62a17ae | 1660 | int count = 0; |
fe08ba7e | 1661 | struct agg_node *rib_rn = NULL; |
d62a17ae | 1662 | |
26a3ffd6 DS |
1663 | rfapiQprefix2Rprefix(p, &rprefix); |
1664 | if (rfd_rib_table) | |
1665 | rib_rn = agg_node_get(rfd_rib_table, p); | |
1666 | ||
d62a17ae | 1667 | count = rfapiNhlAddNodeRoutes( |
fe08ba7e DS |
1668 | agg_node_right(rn), &rprefix, lifetime, 0, head, |
1669 | tail, exclude_vnaddr, rib_rn, | |
1670 | pfx_target_original); | |
d62a17ae | 1671 | if (!count) { |
1672 | count = rfapiNhlAddNodeRoutes( | |
fe08ba7e DS |
1673 | agg_node_right(rn), &rprefix, lifetime, |
1674 | 1, head, tail, exclude_vnaddr, rib_rn, | |
d62a17ae | 1675 | pfx_target_original); |
1676 | } | |
1677 | rcount += count; | |
1678 | if (rib_rn) | |
fe08ba7e | 1679 | agg_unlock_node(rib_rn); |
d62a17ae | 1680 | } |
1681 | } | |
1682 | ||
fe08ba7e | 1683 | if (agg_node_left(rn)) { |
d62a17ae | 1684 | rcount += rfapiNhlAddSubtree( |
fe08ba7e | 1685 | agg_node_left(rn), lifetime, head, tail, omit_node, |
d62a17ae | 1686 | exclude_vnaddr, rfd_rib_table, pfx_target_original); |
1687 | } | |
fe08ba7e | 1688 | if (agg_node_right(rn)) { |
d62a17ae | 1689 | rcount += rfapiNhlAddSubtree( |
fe08ba7e | 1690 | agg_node_right(rn), lifetime, head, tail, omit_node, |
d62a17ae | 1691 | exclude_vnaddr, rfd_rib_table, pfx_target_original); |
1692 | } | |
1693 | ||
1694 | return rcount; | |
65efcfce LB |
1695 | } |
1696 | ||
1697 | /* | |
1698 | * Implementation of ROUTE_LIST(node) from RFAPI-Import-Event-Handling.txt | |
1699 | * | |
1700 | * Construct an rfapi nexthop list based on the routes attached to | |
1701 | * the specified node. | |
1702 | * | |
1defdda8 DS |
1703 | * If there are any routes that do NOT have BGP_PATH_REMOVED set, |
1704 | * return those only. If there are ONLY routes with BGP_PATH_REMOVED, | |
65efcfce LB |
1705 | * then return those, and also include all the non-removed routes from the |
1706 | * next less-specific node (i.e., this node's parent) at the end. | |
1707 | */ | |
d62a17ae | 1708 | struct rfapi_next_hop_entry *rfapiRouteNode2NextHopList( |
fe08ba7e DS |
1709 | struct agg_node *rn, uint32_t lifetime, /* put into nexthop entries */ |
1710 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
1711 | struct agg_table *rfd_rib_table, /* preload here */ | |
1712 | struct prefix *pfx_target_original) /* query target */ | |
65efcfce | 1713 | { |
d62a17ae | 1714 | struct rfapi_ip_prefix rprefix; |
1715 | struct rfapi_next_hop_entry *answer = NULL; | |
1716 | struct rfapi_next_hop_entry *last = NULL; | |
fe08ba7e | 1717 | struct agg_node *parent; |
26a3ffd6 | 1718 | const struct prefix *p = agg_node_get_prefix(rn); |
d62a17ae | 1719 | int count = 0; |
fe08ba7e | 1720 | struct agg_node *rib_rn; |
65efcfce | 1721 | |
1e20238a | 1722 | #ifdef DEBUG_RETURNED_NHL |
26a3ffd6 | 1723 | vnc_zlog_debug_verbose("%s: called with node pfx=%rRN", __func__, rn); |
d62a17ae | 1724 | rfapiDebugBacktrace(); |
65efcfce LB |
1725 | #endif |
1726 | ||
26a3ffd6 | 1727 | rfapiQprefix2Rprefix(p, &rprefix); |
d62a17ae | 1728 | |
26a3ffd6 | 1729 | rib_rn = rfd_rib_table ? agg_node_get(rfd_rib_table, p) : NULL; |
d62a17ae | 1730 | |
1731 | /* | |
1732 | * Add non-withdrawn routes at this node | |
1733 | */ | |
1734 | count = rfapiNhlAddNodeRoutes(rn, &rprefix, lifetime, 0, &answer, &last, | |
1735 | exclude_vnaddr, rib_rn, | |
1736 | pfx_target_original); | |
1737 | ||
1738 | /* | |
1739 | * If the list has at least one entry, it's finished | |
1740 | */ | |
1741 | if (count) { | |
1742 | count += rfapiNhlAddSubtree(rn, lifetime, &answer, &last, NULL, | |
1743 | exclude_vnaddr, rfd_rib_table, | |
1744 | pfx_target_original); | |
1745 | vnc_zlog_debug_verbose("%s: %d nexthops, answer=%p", __func__, | |
1746 | count, answer); | |
1e20238a | 1747 | #ifdef DEBUG_RETURNED_NHL |
d62a17ae | 1748 | rfapiPrintNhl(NULL, answer); |
65efcfce | 1749 | #endif |
d62a17ae | 1750 | if (rib_rn) |
fe08ba7e | 1751 | agg_unlock_node(rib_rn); |
d62a17ae | 1752 | return answer; |
1753 | } | |
1754 | ||
1755 | /* | |
1756 | * Add withdrawn routes at this node | |
1757 | */ | |
1758 | count = rfapiNhlAddNodeRoutes(rn, &rprefix, lifetime, 1, &answer, &last, | |
1759 | exclude_vnaddr, rib_rn, | |
1760 | pfx_target_original); | |
1761 | if (rib_rn) | |
fe08ba7e | 1762 | agg_unlock_node(rib_rn); |
d62a17ae | 1763 | |
1764 | // rfapiPrintNhl(NULL, answer); | |
1765 | ||
1766 | /* | |
1767 | * walk up the tree until we find a node with non-deleted | |
1768 | * routes, then add them | |
1769 | */ | |
fe08ba7e DS |
1770 | for (parent = agg_node_parent(rn); parent; |
1771 | parent = agg_node_parent(parent)) { | |
d62a17ae | 1772 | if (rfapiHasNonRemovedRoutes(parent)) { |
1773 | break; | |
1774 | } | |
1775 | } | |
1776 | ||
1777 | /* | |
1778 | * Add non-withdrawn routes from less-specific prefix | |
1779 | */ | |
1780 | if (parent) { | |
26a3ffd6 DS |
1781 | const struct prefix *p = agg_node_get_prefix(parent); |
1782 | ||
1783 | rib_rn = rfd_rib_table ? agg_node_get(rfd_rib_table, p) : NULL; | |
1784 | rfapiQprefix2Rprefix(p, &rprefix); | |
d62a17ae | 1785 | count += rfapiNhlAddNodeRoutes(parent, &rprefix, lifetime, 0, |
1786 | &answer, &last, exclude_vnaddr, | |
1787 | rib_rn, pfx_target_original); | |
1788 | count += rfapiNhlAddSubtree(parent, lifetime, &answer, &last, | |
1789 | rn, exclude_vnaddr, rfd_rib_table, | |
1790 | pfx_target_original); | |
1791 | if (rib_rn) | |
fe08ba7e | 1792 | agg_unlock_node(rib_rn); |
d62a17ae | 1793 | } else { |
1794 | /* | |
1795 | * There is no parent with non-removed routes. Still need to | |
1796 | * add subtree of original node if it contributed routes to the | |
1797 | * answer. | |
1798 | */ | |
1799 | if (count) | |
1800 | count += rfapiNhlAddSubtree(rn, lifetime, &answer, | |
1801 | &last, rn, exclude_vnaddr, | |
1802 | rfd_rib_table, | |
1803 | pfx_target_original); | |
1804 | } | |
1805 | ||
1806 | vnc_zlog_debug_verbose("%s: %d nexthops, answer=%p", __func__, count, | |
1807 | answer); | |
1e20238a | 1808 | #ifdef DEBUG_RETURNED_NHL |
d62a17ae | 1809 | rfapiPrintNhl(NULL, answer); |
65efcfce | 1810 | #endif |
d62a17ae | 1811 | return answer; |
65efcfce LB |
1812 | } |
1813 | ||
1814 | /* | |
1815 | * Construct nexthop list of all routes in table | |
1816 | */ | |
d62a17ae | 1817 | struct rfapi_next_hop_entry *rfapiRouteTable2NextHopList( |
fe08ba7e DS |
1818 | struct agg_table *rt, uint32_t lifetime, /* put into nexthop entries */ |
1819 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
1820 | struct agg_table *rfd_rib_table, /* preload this NVE rib table */ | |
1821 | struct prefix *pfx_target_original) /* query target */ | |
65efcfce | 1822 | { |
fe08ba7e | 1823 | struct agg_node *rn; |
d62a17ae | 1824 | struct rfapi_next_hop_entry *biglist = NULL; |
1825 | struct rfapi_next_hop_entry *nhl; | |
1826 | struct rfapi_next_hop_entry *tail = NULL; | |
1827 | int count = 0; | |
1828 | ||
fe08ba7e | 1829 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
d62a17ae | 1830 | |
1831 | nhl = rfapiRouteNode2NextHopList(rn, lifetime, exclude_vnaddr, | |
1832 | rfd_rib_table, | |
1833 | pfx_target_original); | |
1834 | if (!tail) { | |
1835 | tail = biglist = nhl; | |
1836 | if (tail) | |
1837 | count = 1; | |
1838 | } else { | |
1839 | tail->next = nhl; | |
1840 | } | |
1841 | if (tail) { | |
1842 | while (tail->next) { | |
1843 | ++count; | |
1844 | tail = tail->next; | |
1845 | } | |
1846 | } | |
1847 | } | |
1848 | ||
1849 | vnc_zlog_debug_verbose("%s: returning %d routes", __func__, count); | |
1850 | return biglist; | |
65efcfce LB |
1851 | } |
1852 | ||
d62a17ae | 1853 | struct rfapi_next_hop_entry *rfapiEthRouteNode2NextHopList( |
fe08ba7e | 1854 | struct agg_node *rn, struct rfapi_ip_prefix *rprefix, |
d62a17ae | 1855 | uint32_t lifetime, /* put into nexthop entries */ |
1856 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
fe08ba7e | 1857 | struct agg_table *rfd_rib_table, /* preload NVE rib table */ |
d62a17ae | 1858 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1859 | { |
d62a17ae | 1860 | int count = 0; |
1861 | struct rfapi_next_hop_entry *answer = NULL; | |
1862 | struct rfapi_next_hop_entry *last = NULL; | |
fe08ba7e | 1863 | struct agg_node *rib_rn; |
65efcfce | 1864 | |
26a3ffd6 DS |
1865 | rib_rn = rfd_rib_table |
1866 | ? agg_node_get(rfd_rib_table, agg_node_get_prefix(rn)) | |
1867 | : NULL; | |
65efcfce | 1868 | |
d62a17ae | 1869 | count = rfapiNhlAddNodeRoutes(rn, rprefix, lifetime, 0, &answer, &last, |
1870 | NULL, rib_rn, pfx_target_original); | |
65efcfce | 1871 | |
1e20238a | 1872 | #ifdef DEBUG_ENCAP_MONITOR |
d62a17ae | 1873 | vnc_zlog_debug_verbose("%s: node %p: %d non-holddown routes", __func__, |
1874 | rn, count); | |
65efcfce LB |
1875 | #endif |
1876 | ||
d62a17ae | 1877 | if (!count) { |
1878 | count = rfapiNhlAddNodeRoutes(rn, rprefix, lifetime, 1, &answer, | |
1879 | &last, exclude_vnaddr, rib_rn, | |
1880 | pfx_target_original); | |
1881 | vnc_zlog_debug_verbose("%s: node %p: %d holddown routes", | |
1882 | __func__, rn, count); | |
1883 | } | |
65efcfce | 1884 | |
d62a17ae | 1885 | if (rib_rn) |
fe08ba7e | 1886 | agg_unlock_node(rib_rn); |
65efcfce | 1887 | |
1e20238a | 1888 | #ifdef DEBUG_RETURNED_NHL |
d62a17ae | 1889 | rfapiPrintNhl(NULL, answer); |
65efcfce LB |
1890 | #endif |
1891 | ||
d62a17ae | 1892 | return answer; |
65efcfce LB |
1893 | } |
1894 | ||
1895 | ||
1896 | /* | |
1897 | * Construct nexthop list of all routes in table | |
1898 | */ | |
d62a17ae | 1899 | struct rfapi_next_hop_entry *rfapiEthRouteTable2NextHopList( |
1900 | uint32_t logical_net_id, struct rfapi_ip_prefix *rprefix, | |
1901 | uint32_t lifetime, /* put into nexthop entries */ | |
1902 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
fe08ba7e | 1903 | struct agg_table *rfd_rib_table, /* preload NVE rib node */ |
d62a17ae | 1904 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1905 | { |
d62a17ae | 1906 | struct rfapi_import_table *it; |
1907 | struct bgp *bgp = bgp_get_default(); | |
fe08ba7e DS |
1908 | struct agg_table *rt; |
1909 | struct agg_node *rn; | |
d62a17ae | 1910 | struct rfapi_next_hop_entry *biglist = NULL; |
1911 | struct rfapi_next_hop_entry *nhl; | |
1912 | struct rfapi_next_hop_entry *tail = NULL; | |
1913 | int count = 0; | |
1914 | ||
1915 | ||
1916 | it = rfapiMacImportTableGet(bgp, logical_net_id); | |
1917 | rt = it->imported_vpn[AFI_L2VPN]; | |
1918 | ||
fe08ba7e | 1919 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
d62a17ae | 1920 | |
1921 | nhl = rfapiEthRouteNode2NextHopList( | |
1922 | rn, rprefix, lifetime, exclude_vnaddr, rfd_rib_table, | |
1923 | pfx_target_original); | |
1924 | if (!tail) { | |
1925 | tail = biglist = nhl; | |
1926 | if (tail) | |
1927 | count = 1; | |
1928 | } else { | |
1929 | tail->next = nhl; | |
1930 | } | |
1931 | if (tail) { | |
1932 | while (tail->next) { | |
1933 | ++count; | |
1934 | tail = tail->next; | |
1935 | } | |
1936 | } | |
1937 | } | |
1938 | ||
1939 | vnc_zlog_debug_verbose("%s: returning %d routes", __func__, count); | |
1940 | return biglist; | |
65efcfce LB |
1941 | } |
1942 | ||
1943 | /* | |
40381db7 DS |
1944 | * Insert a new bpi to the imported route table node, |
1945 | * keeping the list of BPIs sorted best route first | |
65efcfce | 1946 | */ |
fe08ba7e | 1947 | static void rfapiBgpInfoAttachSorted(struct agg_node *rn, |
4b7e6066 | 1948 | struct bgp_path_info *info_new, afi_t afi, |
d62a17ae | 1949 | safi_t safi) |
65efcfce | 1950 | { |
d62a17ae | 1951 | struct bgp *bgp; |
4b7e6066 DS |
1952 | struct bgp_path_info *prev; |
1953 | struct bgp_path_info *next; | |
d62a17ae | 1954 | char pfx_buf[PREFIX2STR_BUFFER]; |
1955 | ||
1956 | ||
1957 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
1958 | ||
1959 | if (VNC_DEBUG(IMPORT_BI_ATTACH)) { | |
1960 | vnc_zlog_debug_verbose("%s: info_new->peer=%p", __func__, | |
1961 | info_new->peer); | |
1962 | vnc_zlog_debug_verbose("%s: info_new->peer->su_remote=%p", | |
1963 | __func__, info_new->peer->su_remote); | |
1964 | } | |
1965 | ||
1966 | for (prev = NULL, next = rn->info; next; | |
1967 | prev = next, next = next->next) { | |
fdf81fa0 DS |
1968 | enum bgp_path_selection_reason reason; |
1969 | ||
1defdda8 DS |
1970 | if (!bgp |
1971 | || (!CHECK_FLAG(info_new->flags, BGP_PATH_REMOVED) | |
1972 | && CHECK_FLAG(next->flags, BGP_PATH_REMOVED)) | |
18ee8310 | 1973 | || bgp_path_info_cmp_compatible(bgp, info_new, next, |
fdf81fa0 DS |
1974 | pfx_buf, afi, safi, |
1975 | &reason) | |
d62a17ae | 1976 | == -1) { /* -1 if 1st is better */ |
1977 | break; | |
1978 | } | |
1979 | } | |
1980 | vnc_zlog_debug_verbose("%s: prev=%p, next=%p", __func__, prev, next); | |
1981 | if (prev) { | |
1982 | prev->next = info_new; | |
1983 | } else { | |
1984 | rn->info = info_new; | |
1985 | } | |
1986 | info_new->prev = prev; | |
1987 | info_new->next = next; | |
1988 | if (next) | |
1989 | next->prev = info_new; | |
1990 | bgp_attr_intern(info_new->attr); | |
65efcfce LB |
1991 | } |
1992 | ||
40381db7 | 1993 | static void rfapiBgpInfoDetach(struct agg_node *rn, struct bgp_path_info *bpi) |
65efcfce | 1994 | { |
d62a17ae | 1995 | /* |
1996 | * Remove the route (doubly-linked) | |
1997 | */ | |
40381db7 DS |
1998 | // bgp_attr_unintern (&bpi->attr); |
1999 | if (bpi->next) | |
2000 | bpi->next->prev = bpi->prev; | |
2001 | if (bpi->prev) | |
2002 | bpi->prev->next = bpi->next; | |
d62a17ae | 2003 | else |
40381db7 | 2004 | rn->info = bpi->next; |
65efcfce LB |
2005 | } |
2006 | ||
2007 | /* | |
2008 | * For L3-indexed import tables | |
2009 | */ | |
1a4189d4 | 2010 | static int rfapi_bi_peer_rd_cmp(const void *b1, const void *b2) |
65efcfce | 2011 | { |
1a4189d4 DS |
2012 | const struct bgp_path_info *bpi1 = b1; |
2013 | const struct bgp_path_info *bpi2 = b2; | |
d62a17ae | 2014 | |
2015 | /* | |
2016 | * Compare peers | |
2017 | */ | |
40381db7 | 2018 | if (bpi1->peer < bpi2->peer) |
d62a17ae | 2019 | return -1; |
40381db7 | 2020 | if (bpi1->peer > bpi2->peer) |
d62a17ae | 2021 | return 1; |
2022 | ||
2023 | /* | |
2024 | * compare RDs | |
2025 | */ | |
1a4189d4 DS |
2026 | return vnc_prefix_cmp( |
2027 | (const struct prefix *)&bpi1->extra->vnc.import.rd, | |
2028 | (const struct prefix *)&bpi2->extra->vnc.import.rd); | |
65efcfce LB |
2029 | } |
2030 | ||
2031 | /* | |
2032 | * For L2-indexed import tables | |
40381db7 | 2033 | * The BPIs in these tables should ALWAYS have an aux_prefix set because |
65efcfce LB |
2034 | * they arrive via IPv4 or IPv6 advertisements. |
2035 | */ | |
1a4189d4 | 2036 | static int rfapi_bi_peer_rd_aux_cmp(const void *b1, const void *b2) |
65efcfce | 2037 | { |
1a4189d4 DS |
2038 | const struct bgp_path_info *bpi1 = b1; |
2039 | const struct bgp_path_info *bpi2 = b2; | |
d62a17ae | 2040 | int rc; |
2041 | ||
2042 | /* | |
2043 | * Compare peers | |
2044 | */ | |
40381db7 | 2045 | if (bpi1->peer < bpi2->peer) |
d62a17ae | 2046 | return -1; |
40381db7 | 2047 | if (bpi1->peer > bpi2->peer) |
d62a17ae | 2048 | return 1; |
2049 | ||
2050 | /* | |
2051 | * compare RDs | |
2052 | */ | |
40381db7 DS |
2053 | rc = vnc_prefix_cmp((struct prefix *)&bpi1->extra->vnc.import.rd, |
2054 | (struct prefix *)&bpi2->extra->vnc.import.rd); | |
d62a17ae | 2055 | if (rc) { |
2056 | return rc; | |
2057 | } | |
2058 | ||
2059 | /* | |
2060 | * L2 import tables can have multiple entries with the | |
2061 | * same MAC address, same RD, but different L3 addresses. | |
2062 | * | |
2063 | * Use presence of aux_prefix with AF=ethernet and prefixlen=1 | |
2064 | * as magic value to signify explicit wildcarding of the aux_prefix. | |
40381db7 DS |
2065 | * This magic value will not appear in bona fide bpi entries in |
2066 | * the import table, but is allowed in the "fake" bpi used to | |
d62a17ae | 2067 | * probe the table when searching. (We have to test both b1 and b2 |
2068 | * because there is no guarantee of the order the test key and | |
2069 | * the real key will be passed) | |
2070 | */ | |
40381db7 DS |
2071 | if ((bpi1->extra->vnc.import.aux_prefix.family == AF_ETHERNET |
2072 | && (bpi1->extra->vnc.import.aux_prefix.prefixlen == 1)) | |
2073 | || (bpi2->extra->vnc.import.aux_prefix.family == AF_ETHERNET | |
2074 | && (bpi2->extra->vnc.import.aux_prefix.prefixlen == 1))) { | |
d62a17ae | 2075 | |
2076 | /* | |
2077 | * wildcard aux address specified | |
2078 | */ | |
2079 | return 0; | |
2080 | } | |
2081 | ||
40381db7 DS |
2082 | return vnc_prefix_cmp(&bpi1->extra->vnc.import.aux_prefix, |
2083 | &bpi2->extra->vnc.import.aux_prefix); | |
65efcfce LB |
2084 | } |
2085 | ||
2086 | ||
2087 | /* | |
2088 | * Index on RD and Peer | |
2089 | */ | |
fe08ba7e | 2090 | static void rfapiItBiIndexAdd(struct agg_node *rn, /* Import table VPN node */ |
40381db7 | 2091 | struct bgp_path_info *bpi) /* new BPI */ |
65efcfce | 2092 | { |
d62a17ae | 2093 | struct skiplist *sl; |
26a3ffd6 | 2094 | const struct prefix *p; |
d62a17ae | 2095 | |
2096 | assert(rn); | |
40381db7 DS |
2097 | assert(bpi); |
2098 | assert(bpi->extra); | |
d62a17ae | 2099 | |
c4f64ea9 DA |
2100 | vnc_zlog_debug_verbose("%s: bpi %p, peer %p, rd %pRD", __func__, bpi, |
2101 | bpi->peer, &bpi->extra->vnc.import.rd); | |
d62a17ae | 2102 | |
2103 | sl = RFAPI_RDINDEX_W_ALLOC(rn); | |
2104 | if (!sl) { | |
26a3ffd6 DS |
2105 | p = agg_node_get_prefix(rn); |
2106 | if (AF_ETHERNET == p->family) { | |
d62a17ae | 2107 | sl = skiplist_new(0, rfapi_bi_peer_rd_aux_cmp, NULL); |
2108 | } else { | |
2109 | sl = skiplist_new(0, rfapi_bi_peer_rd_cmp, NULL); | |
2110 | } | |
2111 | RFAPI_IT_EXTRA_GET(rn)->u.vpn.idx_rd = sl; | |
fe08ba7e | 2112 | agg_lock_node(rn); /* for skiplist */ |
d62a17ae | 2113 | } |
40381db7 | 2114 | assert(!skiplist_insert(sl, (void *)bpi, (void *)bpi)); |
fe08ba7e | 2115 | agg_lock_node(rn); /* for skiplist entry */ |
d62a17ae | 2116 | |
40381db7 | 2117 | /* NB: BPIs in import tables are not refcounted */ |
65efcfce LB |
2118 | } |
2119 | ||
fe08ba7e | 2120 | static void rfapiItBiIndexDump(struct agg_node *rn) |
65efcfce | 2121 | { |
d62a17ae | 2122 | struct skiplist *sl; |
2123 | void *cursor = NULL; | |
4b7e6066 DS |
2124 | struct bgp_path_info *k; |
2125 | struct bgp_path_info *v; | |
d62a17ae | 2126 | int rc; |
2127 | ||
2128 | sl = RFAPI_RDINDEX(rn); | |
2129 | if (!sl) | |
2130 | return; | |
2131 | ||
2132 | for (rc = skiplist_next(sl, (void **)&k, (void **)&v, &cursor); !rc; | |
2133 | rc = skiplist_next(sl, (void **)&k, (void **)&v, &cursor)) { | |
2134 | ||
06b9f471 | 2135 | char buf[RD_ADDRSTRLEN]; |
872ed4c7 | 2136 | char buf_aux_pfx[PREFIX_STRLEN]; |
d62a17ae | 2137 | |
06b9f471 | 2138 | prefix_rd2str(&k->extra->vnc.import.rd, buf, sizeof(buf)); |
d62a17ae | 2139 | if (k->extra->vnc.import.aux_prefix.family) { |
2140 | prefix2str(&k->extra->vnc.import.aux_prefix, | |
06b9f471 DS |
2141 | buf_aux_pfx, sizeof(buf_aux_pfx)); |
2142 | } else | |
9825c71e | 2143 | strlcpy(buf_aux_pfx, "(none)", sizeof(buf_aux_pfx)); |
d62a17ae | 2144 | |
40381db7 | 2145 | vnc_zlog_debug_verbose("bpi %p, peer %p, rd %s, aux_prefix %s", |
d62a17ae | 2146 | k, k->peer, buf, buf_aux_pfx); |
2147 | } | |
65efcfce LB |
2148 | } |
2149 | ||
4b7e6066 | 2150 | static struct bgp_path_info *rfapiItBiIndexSearch( |
fe08ba7e | 2151 | struct agg_node *rn, /* Import table VPN node */ |
d62a17ae | 2152 | struct prefix_rd *prd, struct peer *peer, |
5a1ae2c2 | 2153 | const struct prefix *aux_prefix) /* optional L3 addr for L2 ITs */ |
65efcfce | 2154 | { |
d62a17ae | 2155 | struct skiplist *sl; |
2156 | int rc; | |
b8694ef4 DS |
2157 | struct bgp_path_info bpi_fake = {0}; |
2158 | struct bgp_path_info_extra bpi_extra = {0}; | |
40381db7 | 2159 | struct bgp_path_info *bpi_result; |
65efcfce | 2160 | |
d62a17ae | 2161 | sl = RFAPI_RDINDEX(rn); |
2162 | if (!sl) | |
2163 | return NULL; | |
65efcfce | 2164 | |
1e20238a | 2165 | #ifdef DEBUG_BI_SEARCH |
d62a17ae | 2166 | { |
872ed4c7 | 2167 | char buf_aux_pfx[PREFIX_STRLEN]; |
d62a17ae | 2168 | |
d62a17ae | 2169 | if (aux_prefix) { |
872ed4c7 DS |
2170 | prefix2str(aux_prefix, buf_aux_pfx, |
2171 | sizeof(buf_aux_pfx)); | |
06b9f471 | 2172 | } else |
9825c71e | 2173 | strlcpy(buf_aux_pfx, "(nil)", sizeof(buf_aux_pfx)); |
d62a17ae | 2174 | |
c4f64ea9 DA |
2175 | vnc_zlog_debug_verbose( |
2176 | "%s want prd=%pRD, peer=%p, aux_prefix=%s", __func__, | |
2177 | prd, peer, buf_aux_pfx); | |
d62a17ae | 2178 | rfapiItBiIndexDump(rn); |
2179 | } | |
65efcfce LB |
2180 | #endif |
2181 | ||
d62a17ae | 2182 | /* threshold is a WAG */ |
2183 | if (sl->count < 3) { | |
1e20238a | 2184 | #ifdef DEBUG_BI_SEARCH |
d62a17ae | 2185 | vnc_zlog_debug_verbose("%s: short list algorithm", __func__); |
65efcfce | 2186 | #endif |
d62a17ae | 2187 | /* if short list, linear search might be faster */ |
40381db7 DS |
2188 | for (bpi_result = rn->info; bpi_result; |
2189 | bpi_result = bpi_result->next) { | |
1e20238a | 2190 | #ifdef DEBUG_BI_SEARCH |
c4f64ea9 DA |
2191 | vnc_zlog_debug_verbose( |
2192 | "%s: bpi has prd=%pRD, peer=%p", __func__, | |
2193 | &bpi_result->extra->vnc.import.rd, | |
2194 | bpi_result->peer); | |
65efcfce | 2195 | #endif |
40381db7 DS |
2196 | if (peer == bpi_result->peer |
2197 | && !prefix_cmp((struct prefix *)&bpi_result->extra | |
d62a17ae | 2198 | ->vnc.import.rd, |
2199 | (struct prefix *)prd)) { | |
65efcfce | 2200 | |
1e20238a | 2201 | #ifdef DEBUG_BI_SEARCH |
d62a17ae | 2202 | vnc_zlog_debug_verbose( |
2203 | "%s: peer and RD same, doing aux_prefix check", | |
2204 | __func__); | |
65efcfce | 2205 | #endif |
d62a17ae | 2206 | if (!aux_prefix |
40381db7 DS |
2207 | || !prefix_cmp( |
2208 | aux_prefix, | |
2209 | &bpi_result->extra->vnc.import | |
2210 | .aux_prefix)) { | |
65efcfce | 2211 | |
1e20238a | 2212 | #ifdef DEBUG_BI_SEARCH |
d62a17ae | 2213 | vnc_zlog_debug_verbose("%s: match", |
2214 | __func__); | |
65efcfce | 2215 | #endif |
d62a17ae | 2216 | break; |
2217 | } | |
2218 | } | |
2219 | } | |
40381db7 | 2220 | return bpi_result; |
d62a17ae | 2221 | } |
2222 | ||
40381db7 DS |
2223 | bpi_fake.peer = peer; |
2224 | bpi_fake.extra = &bpi_extra; | |
c4efd0f4 | 2225 | bpi_fake.extra->vnc.import.rd = *prd; |
d62a17ae | 2226 | if (aux_prefix) { |
40381db7 | 2227 | bpi_fake.extra->vnc.import.aux_prefix = *aux_prefix; |
d62a17ae | 2228 | } else { |
2229 | /* wildcard */ | |
40381db7 DS |
2230 | bpi_fake.extra->vnc.import.aux_prefix.family = AF_ETHERNET; |
2231 | bpi_fake.extra->vnc.import.aux_prefix.prefixlen = 1; | |
d62a17ae | 2232 | } |
2233 | ||
40381db7 | 2234 | rc = skiplist_search(sl, (void *)&bpi_fake, (void *)&bpi_result); |
d62a17ae | 2235 | |
2236 | if (rc) { | |
1e20238a | 2237 | #ifdef DEBUG_BI_SEARCH |
d62a17ae | 2238 | vnc_zlog_debug_verbose("%s: no match", __func__); |
65efcfce | 2239 | #endif |
d62a17ae | 2240 | return NULL; |
2241 | } | |
65efcfce | 2242 | |
1e20238a | 2243 | #ifdef DEBUG_BI_SEARCH |
40381db7 | 2244 | vnc_zlog_debug_verbose("%s: matched bpi=%p", __func__, bpi_result); |
65efcfce LB |
2245 | #endif |
2246 | ||
40381db7 | 2247 | return bpi_result; |
65efcfce LB |
2248 | } |
2249 | ||
fe08ba7e | 2250 | static void rfapiItBiIndexDel(struct agg_node *rn, /* Import table VPN node */ |
40381db7 | 2251 | struct bgp_path_info *bpi) /* old BPI */ |
65efcfce | 2252 | { |
d62a17ae | 2253 | struct skiplist *sl; |
2254 | int rc; | |
65efcfce | 2255 | |
c4f64ea9 DA |
2256 | vnc_zlog_debug_verbose("%s: bpi %p, peer %p, rd %pRD", __func__, bpi, |
2257 | bpi->peer, &bpi->extra->vnc.import.rd); | |
65efcfce | 2258 | |
d62a17ae | 2259 | sl = RFAPI_RDINDEX(rn); |
2260 | assert(sl); | |
65efcfce | 2261 | |
40381db7 | 2262 | rc = skiplist_delete(sl, (void *)(bpi), (void *)bpi); |
d62a17ae | 2263 | if (rc) { |
2264 | rfapiItBiIndexDump(rn); | |
2265 | } | |
2266 | assert(!rc); | |
65efcfce | 2267 | |
fe08ba7e | 2268 | agg_unlock_node(rn); /* for skiplist entry */ |
65efcfce | 2269 | |
40381db7 | 2270 | /* NB: BPIs in import tables are not refcounted */ |
65efcfce LB |
2271 | } |
2272 | ||
2273 | /* | |
2274 | * Add a backreference at the ENCAP node to the VPN route that | |
2275 | * refers to it | |
2276 | */ | |
4b7e6066 DS |
2277 | static void |
2278 | rfapiMonitorEncapAdd(struct rfapi_import_table *import_table, | |
40381db7 DS |
2279 | struct prefix *p, /* VN address */ |
2280 | struct agg_node *vpn_rn, /* VPN node */ | |
2281 | struct bgp_path_info *vpn_bpi) /* VPN bpi/route */ | |
65efcfce | 2282 | { |
d62a17ae | 2283 | afi_t afi = family2afi(p->family); |
fe08ba7e | 2284 | struct agg_node *rn; |
d62a17ae | 2285 | struct rfapi_monitor_encap *m; |
2286 | ||
2287 | assert(afi); | |
fe08ba7e | 2288 | rn = agg_node_get(import_table->imported_encap[afi], p); /* locks rn */ |
d62a17ae | 2289 | assert(rn); |
2290 | ||
2291 | m = XCALLOC(MTYPE_RFAPI_MONITOR_ENCAP, | |
2292 | sizeof(struct rfapi_monitor_encap)); | |
d62a17ae | 2293 | |
2294 | m->node = vpn_rn; | |
40381db7 | 2295 | m->bpi = vpn_bpi; |
d62a17ae | 2296 | m->rn = rn; |
2297 | ||
2298 | /* insert to encap node's list */ | |
2299 | m->next = RFAPI_MONITOR_ENCAP(rn); | |
2300 | if (m->next) | |
2301 | m->next->prev = m; | |
2302 | RFAPI_MONITOR_ENCAP_W_ALLOC(rn) = m; | |
2303 | ||
2304 | /* for easy lookup when deleting vpn route */ | |
40381db7 | 2305 | vpn_bpi->extra->vnc.import.hme = m; |
d62a17ae | 2306 | |
2307 | vnc_zlog_debug_verbose( | |
40381db7 DS |
2308 | "%s: it=%p, vpn_bpi=%p, afi=%d, encap rn=%p, setting vpn_bpi->extra->vnc.import.hme=%p", |
2309 | __func__, import_table, vpn_bpi, afi, rn, m); | |
d62a17ae | 2310 | |
2311 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, 0); | |
40381db7 | 2312 | bgp_attr_intern(vpn_bpi->attr); |
65efcfce LB |
2313 | } |
2314 | ||
40381db7 | 2315 | static void rfapiMonitorEncapDelete(struct bgp_path_info *vpn_bpi) |
65efcfce | 2316 | { |
d62a17ae | 2317 | /* |
2318 | * Remove encap monitor | |
2319 | */ | |
40381db7 DS |
2320 | vnc_zlog_debug_verbose("%s: vpn_bpi=%p", __func__, vpn_bpi); |
2321 | if (vpn_bpi->extra) { | |
2322 | struct rfapi_monitor_encap *hme = | |
2323 | vpn_bpi->extra->vnc.import.hme; | |
d62a17ae | 2324 | |
2325 | if (hme) { | |
2326 | ||
2327 | vnc_zlog_debug_verbose("%s: hme=%p", __func__, hme); | |
2328 | ||
2329 | /* Refcount checking takes too long here */ | |
2330 | // RFAPI_CHECK_REFCOUNT(hme->rn, SAFI_ENCAP, 0); | |
2331 | if (hme->next) | |
2332 | hme->next->prev = hme->prev; | |
2333 | if (hme->prev) | |
2334 | hme->prev->next = hme->next; | |
2335 | else | |
2336 | RFAPI_MONITOR_ENCAP_W_ALLOC(hme->rn) = | |
2337 | hme->next; | |
2338 | /* Refcount checking takes too long here */ | |
2339 | // RFAPI_CHECK_REFCOUNT(hme->rn, SAFI_ENCAP, 1); | |
2340 | ||
2341 | /* see if the struct rfapi_it_extra is empty and can be | |
2342 | * freed */ | |
2343 | rfapiMonitorExtraPrune(SAFI_ENCAP, hme->rn); | |
2344 | ||
fe08ba7e | 2345 | agg_unlock_node(hme->rn); /* decr ref count */ |
d62a17ae | 2346 | XFREE(MTYPE_RFAPI_MONITOR_ENCAP, hme); |
40381db7 | 2347 | vpn_bpi->extra->vnc.import.hme = NULL; |
d62a17ae | 2348 | } |
2349 | } | |
65efcfce LB |
2350 | } |
2351 | ||
2352 | /* | |
2353 | * quagga lib/thread.h says this must return int even though | |
2354 | * it doesn't do anything with the return value | |
2355 | */ | |
cc9f21da | 2356 | static void rfapiWithdrawTimerVPN(struct thread *t) |
65efcfce | 2357 | { |
c3aaa89a | 2358 | struct rfapi_withdraw *wcb = THREAD_ARG(t); |
40381db7 | 2359 | struct bgp_path_info *bpi = wcb->info; |
d62a17ae | 2360 | struct bgp *bgp = bgp_get_default(); |
26a3ffd6 | 2361 | const struct prefix *p; |
d62a17ae | 2362 | struct rfapi_monitor_vpn *moved; |
2363 | afi_t afi; | |
2364 | ||
f4c713ae LB |
2365 | if (bgp == NULL) { |
2366 | vnc_zlog_debug_verbose( | |
2367 | "%s: NULL BGP pointer, assume shutdown race condition!!!", | |
2368 | __func__); | |
cc9f21da | 2369 | return; |
f4c713ae | 2370 | } |
892fedb6 | 2371 | if (CHECK_FLAG(bgp->flags, BGP_FLAG_DELETE_IN_PROGRESS)) { |
f4c713ae | 2372 | vnc_zlog_debug_verbose( |
892fedb6 DA |
2373 | "%s: BGP delete in progress, assume shutdown race condition!!!", |
2374 | __func__); | |
cc9f21da | 2375 | return; |
f4c713ae | 2376 | } |
d62a17ae | 2377 | assert(wcb->node); |
40381db7 | 2378 | assert(bpi); |
d62a17ae | 2379 | assert(wcb->import_table); |
40381db7 | 2380 | assert(bpi->extra); |
d62a17ae | 2381 | |
2382 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_MPLS_VPN, wcb->lockoffset); | |
2383 | ||
26a3ffd6 DS |
2384 | vnc_zlog_debug_verbose("%s: removing bpi %p at prefix %pRN", __func__, |
2385 | bpi, wcb->node); | |
d62a17ae | 2386 | |
2387 | /* | |
2388 | * Remove the route (doubly-linked) | |
2389 | */ | |
40381db7 DS |
2390 | if (CHECK_FLAG(bpi->flags, BGP_PATH_VALID) |
2391 | && VALID_INTERIOR_TYPE(bpi->type)) | |
d62a17ae | 2392 | RFAPI_MONITOR_EXTERIOR(wcb->node)->valid_interior_count--; |
2393 | ||
26a3ffd6 DS |
2394 | p = agg_node_get_prefix(wcb->node); |
2395 | afi = family2afi(p->family); | |
d62a17ae | 2396 | wcb->import_table->holddown_count[afi] -= 1; /* keep count consistent */ |
40381db7 DS |
2397 | rfapiItBiIndexDel(wcb->node, bpi); |
2398 | rfapiBgpInfoDetach(wcb->node, bpi); /* with removed bpi */ | |
d62a17ae | 2399 | |
2400 | vnc_import_bgp_exterior_del_route_interior(bgp, wcb->import_table, | |
40381db7 | 2401 | wcb->node, bpi); |
d62a17ae | 2402 | |
2403 | ||
2404 | /* | |
2405 | * If VNC is configured to send response remove messages, AND | |
2406 | * if the removed route had a UN address, do response removal | |
2407 | * processing. | |
2408 | */ | |
2409 | if (!(bgp->rfapi_cfg->flags | |
2410 | & BGP_VNC_CONFIG_RESPONSE_REMOVAL_DISABLE)) { | |
2411 | ||
2412 | int has_valid_duplicate = 0; | |
40381db7 | 2413 | struct bgp_path_info *bpii; |
d62a17ae | 2414 | |
2415 | /* | |
2416 | * First check if there are any OTHER routes at this node | |
2417 | * that have the same nexthop and a valid UN address. If | |
2418 | * there are (e.g., from other peers), then the route isn't | |
2419 | * really gone, so skip sending a response removal message. | |
2420 | */ | |
40381db7 DS |
2421 | for (bpii = wcb->node->info; bpii; bpii = bpii->next) { |
2422 | if (rfapiVpnBiSamePtUn(bpi, bpii)) { | |
d62a17ae | 2423 | has_valid_duplicate = 1; |
2424 | break; | |
2425 | } | |
2426 | } | |
2427 | ||
2428 | vnc_zlog_debug_verbose("%s: has_valid_duplicate=%d", __func__, | |
2429 | has_valid_duplicate); | |
2430 | ||
2431 | if (!has_valid_duplicate) { | |
2432 | rfapiRibPendingDeleteRoute(bgp, wcb->import_table, afi, | |
2433 | wcb->node); | |
2434 | } | |
2435 | } | |
2436 | ||
40381db7 | 2437 | rfapiMonitorEncapDelete(bpi); |
d62a17ae | 2438 | |
2439 | /* | |
2440 | * If there are no VPN monitors at this VPN Node A, | |
2441 | * we are done | |
2442 | */ | |
2443 | if (!RFAPI_MONITOR_VPN(wcb->node)) { | |
2444 | vnc_zlog_debug_verbose("%s: no VPN monitors at this node", | |
2445 | __func__); | |
2446 | goto done; | |
2447 | } | |
2448 | ||
2449 | /* | |
2450 | * rfapiMonitorMoveShorter only moves monitors if there are | |
2451 | * no remaining valid routes at the current node | |
2452 | */ | |
2453 | moved = rfapiMonitorMoveShorter(wcb->node, 1); | |
2454 | ||
2455 | if (moved) { | |
2456 | rfapiMonitorMovedUp(wcb->import_table, wcb->node, moved->node, | |
2457 | moved); | |
2458 | } | |
65efcfce LB |
2459 | |
2460 | done: | |
d62a17ae | 2461 | /* |
40381db7 | 2462 | * Free VPN bpi |
d62a17ae | 2463 | */ |
40381db7 | 2464 | rfapiBgpInfoFree(bpi); |
d62a17ae | 2465 | wcb->info = NULL; |
2466 | ||
2467 | /* | |
2468 | * If route count at this node has gone to 0, withdraw exported prefix | |
2469 | */ | |
2470 | if (!wcb->node->info) { | |
2471 | /* see if the struct rfapi_it_extra is empty and can be freed */ | |
2472 | rfapiMonitorExtraPrune(SAFI_MPLS_VPN, wcb->node); | |
2473 | vnc_direct_bgp_del_prefix(bgp, wcb->import_table, wcb->node); | |
2474 | vnc_zebra_del_prefix(bgp, wcb->import_table, wcb->node); | |
2475 | } else { | |
2476 | /* | |
2477 | * nexthop change event | |
2478 | * vnc_direct_bgp_add_prefix() will recompute the VN addr | |
2479 | * ecommunity | |
2480 | */ | |
2481 | vnc_direct_bgp_add_prefix(bgp, wcb->import_table, wcb->node); | |
2482 | } | |
2483 | ||
2484 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_MPLS_VPN, 1 + wcb->lockoffset); | |
fe08ba7e | 2485 | agg_unlock_node(wcb->node); /* decr ref count */ |
d62a17ae | 2486 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); |
65efcfce LB |
2487 | } |
2488 | ||
2489 | /* | |
2490 | * This works for multiprotocol extension, but not for plain ol' | |
2491 | * unicast IPv4 because that nexthop is stored in attr->nexthop | |
2492 | */ | |
d62a17ae | 2493 | void rfapiNexthop2Prefix(struct attr *attr, struct prefix *p) |
65efcfce | 2494 | { |
d62a17ae | 2495 | assert(p); |
2496 | assert(attr); | |
2497 | ||
2498 | memset(p, 0, sizeof(struct prefix)); | |
2499 | ||
2500 | switch (p->family = BGP_MP_NEXTHOP_FAMILY(attr->mp_nexthop_len)) { | |
2501 | case AF_INET: | |
2502 | p->u.prefix4 = attr->mp_nexthop_global_in; | |
30360041 | 2503 | p->prefixlen = IPV4_MAX_BITLEN; |
d62a17ae | 2504 | break; |
2505 | ||
2506 | case AF_INET6: | |
2507 | p->u.prefix6 = attr->mp_nexthop_global; | |
135e9bdb | 2508 | p->prefixlen = IPV6_MAX_BITLEN; |
d62a17ae | 2509 | break; |
2510 | ||
2511 | default: | |
2512 | vnc_zlog_debug_verbose("%s: Family is unknown = %d", __func__, | |
2513 | p->family); | |
2514 | } | |
65efcfce LB |
2515 | } |
2516 | ||
d62a17ae | 2517 | void rfapiUnicastNexthop2Prefix(afi_t afi, struct attr *attr, struct prefix *p) |
65efcfce | 2518 | { |
d62a17ae | 2519 | if (afi == AFI_IP) { |
2520 | p->family = AF_INET; | |
30360041 | 2521 | p->prefixlen = IPV4_MAX_BITLEN; |
d62a17ae | 2522 | p->u.prefix4 = attr->nexthop; |
2523 | } else { | |
2524 | rfapiNexthop2Prefix(attr, p); | |
2525 | } | |
65efcfce LB |
2526 | } |
2527 | ||
d62a17ae | 2528 | static int rfapiAttrNexthopAddrDifferent(struct prefix *p1, struct prefix *p2) |
65efcfce | 2529 | { |
d62a17ae | 2530 | if (!p1 || !p2) { |
2531 | vnc_zlog_debug_verbose("%s: p1 or p2 is NULL", __func__); | |
2532 | return 1; | |
2533 | } | |
2534 | ||
2535 | /* | |
2536 | * Are address families the same? | |
2537 | */ | |
2538 | if (p1->family != p2->family) { | |
2539 | return 1; | |
2540 | } | |
2541 | ||
2542 | switch (p1->family) { | |
2543 | case AF_INET: | |
2544 | if (IPV4_ADDR_SAME(&p1->u.prefix4, &p2->u.prefix4)) | |
2545 | return 0; | |
2546 | break; | |
2547 | ||
2548 | case AF_INET6: | |
2549 | if (IPV6_ADDR_SAME(&p1->u.prefix6, &p2->u.prefix6)) | |
2550 | return 0; | |
2551 | break; | |
2552 | ||
2553 | default: | |
2554 | assert(1); | |
2555 | } | |
2556 | ||
2557 | return 1; | |
65efcfce LB |
2558 | } |
2559 | ||
40381db7 DS |
2560 | static void rfapiCopyUnEncap2VPN(struct bgp_path_info *encap_bpi, |
2561 | struct bgp_path_info *vpn_bpi) | |
65efcfce | 2562 | { |
40381db7 DS |
2563 | if (!vpn_bpi || !vpn_bpi->extra) { |
2564 | zlog_warn("%s: no vpn bpi attr/extra, can't copy UN address", | |
d62a17ae | 2565 | __func__); |
2566 | return; | |
2567 | } | |
2568 | ||
40381db7 | 2569 | switch (BGP_MP_NEXTHOP_FAMILY(encap_bpi->attr->mp_nexthop_len)) { |
d62a17ae | 2570 | case AF_INET: |
2571 | ||
2572 | /* | |
2573 | * instrumentation to debug segfault of 091127 | |
2574 | */ | |
40381db7 | 2575 | vnc_zlog_debug_verbose("%s: vpn_bpi=%p", __func__, vpn_bpi); |
e6b457ac DA |
2576 | vnc_zlog_debug_verbose("%s: vpn_bpi->extra=%p", __func__, |
2577 | vpn_bpi->extra); | |
d62a17ae | 2578 | |
40381db7 DS |
2579 | vpn_bpi->extra->vnc.import.un_family = AF_INET; |
2580 | vpn_bpi->extra->vnc.import.un.addr4 = | |
2581 | encap_bpi->attr->mp_nexthop_global_in; | |
d62a17ae | 2582 | break; |
2583 | ||
2584 | case AF_INET6: | |
40381db7 DS |
2585 | vpn_bpi->extra->vnc.import.un_family = AF_INET6; |
2586 | vpn_bpi->extra->vnc.import.un.addr6 = | |
2587 | encap_bpi->attr->mp_nexthop_global; | |
d62a17ae | 2588 | break; |
2589 | ||
2590 | default: | |
2591 | zlog_warn("%s: invalid encap nexthop length: %d", __func__, | |
40381db7 | 2592 | encap_bpi->attr->mp_nexthop_len); |
c7ca5ccf | 2593 | vpn_bpi->extra->vnc.import.un_family = AF_UNSPEC; |
d62a17ae | 2594 | break; |
2595 | } | |
65efcfce LB |
2596 | } |
2597 | ||
2598 | /* | |
2599 | * returns 0 on success, nonzero on error | |
2600 | */ | |
40381db7 DS |
2601 | static int |
2602 | rfapiWithdrawEncapUpdateCachedUn(struct rfapi_import_table *import_table, | |
2603 | struct bgp_path_info *encap_bpi, | |
2604 | struct agg_node *vpn_rn, | |
2605 | struct bgp_path_info *vpn_bpi) | |
65efcfce | 2606 | { |
40381db7 | 2607 | if (!encap_bpi) { |
d62a17ae | 2608 | |
2609 | /* | |
2610 | * clear cached UN address | |
2611 | */ | |
40381db7 | 2612 | if (!vpn_bpi || !vpn_bpi->extra) { |
d62a17ae | 2613 | zlog_warn( |
40381db7 | 2614 | "%s: missing VPN bpi/extra, can't clear UN addr", |
d62a17ae | 2615 | __func__); |
2616 | return 1; | |
2617 | } | |
c7ca5ccf | 2618 | vpn_bpi->extra->vnc.import.un_family = AF_UNSPEC; |
40381db7 DS |
2619 | memset(&vpn_bpi->extra->vnc.import.un, 0, |
2620 | sizeof(vpn_bpi->extra->vnc.import.un)); | |
2621 | if (CHECK_FLAG(vpn_bpi->flags, BGP_PATH_VALID)) { | |
2622 | if (rfapiGetVncTunnelUnAddr(vpn_bpi->attr, NULL)) { | |
2623 | UNSET_FLAG(vpn_bpi->flags, BGP_PATH_VALID); | |
2624 | if (VALID_INTERIOR_TYPE(vpn_bpi->type)) | |
d62a17ae | 2625 | RFAPI_MONITOR_EXTERIOR(vpn_rn) |
2626 | ->valid_interior_count--; | |
2627 | /* signal interior route withdrawal to | |
2628 | * import-exterior */ | |
2629 | vnc_import_bgp_exterior_del_route_interior( | |
2630 | bgp_get_default(), import_table, vpn_rn, | |
40381db7 | 2631 | vpn_bpi); |
d62a17ae | 2632 | } |
2633 | } | |
2634 | ||
2635 | } else { | |
40381db7 DS |
2636 | if (!vpn_bpi) { |
2637 | zlog_warn("%s: missing VPN bpi, can't clear UN addr", | |
d62a17ae | 2638 | __func__); |
2639 | return 1; | |
2640 | } | |
40381db7 DS |
2641 | rfapiCopyUnEncap2VPN(encap_bpi, vpn_bpi); |
2642 | if (!CHECK_FLAG(vpn_bpi->flags, BGP_PATH_VALID)) { | |
2643 | SET_FLAG(vpn_bpi->flags, BGP_PATH_VALID); | |
2644 | if (VALID_INTERIOR_TYPE(vpn_bpi->type)) | |
d62a17ae | 2645 | RFAPI_MONITOR_EXTERIOR(vpn_rn) |
2646 | ->valid_interior_count++; | |
2647 | /* signal interior route withdrawal to import-exterior | |
2648 | */ | |
2649 | vnc_import_bgp_exterior_add_route_interior( | |
2650 | bgp_get_default(), import_table, vpn_rn, | |
40381db7 | 2651 | vpn_bpi); |
d62a17ae | 2652 | } |
2653 | } | |
2654 | return 0; | |
65efcfce LB |
2655 | } |
2656 | ||
cc9f21da | 2657 | static void rfapiWithdrawTimerEncap(struct thread *t) |
65efcfce | 2658 | { |
c3aaa89a | 2659 | struct rfapi_withdraw *wcb = THREAD_ARG(t); |
40381db7 | 2660 | struct bgp_path_info *bpi = wcb->info; |
d62a17ae | 2661 | int was_first_route = 0; |
2662 | struct rfapi_monitor_encap *em; | |
2663 | struct skiplist *vpn_node_sl = skiplist_new(0, NULL, NULL); | |
2664 | ||
2665 | assert(wcb->node); | |
40381db7 | 2666 | assert(bpi); |
d62a17ae | 2667 | assert(wcb->import_table); |
2668 | ||
2669 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_ENCAP, 0); | |
2670 | ||
40381db7 | 2671 | if (wcb->node->info == bpi) |
d62a17ae | 2672 | was_first_route = 1; |
2673 | ||
2674 | /* | |
40381db7 | 2675 | * Remove the route/bpi and free it |
d62a17ae | 2676 | */ |
40381db7 DS |
2677 | rfapiBgpInfoDetach(wcb->node, bpi); |
2678 | rfapiBgpInfoFree(bpi); | |
d62a17ae | 2679 | |
2680 | if (!was_first_route) | |
2681 | goto done; | |
2682 | ||
2683 | for (em = RFAPI_MONITOR_ENCAP(wcb->node); em; em = em->next) { | |
2684 | ||
2685 | /* | |
40381db7 DS |
2686 | * Update monitoring VPN BPIs with new encap info at the |
2687 | * head of the encap bpi chain (which could be NULL after | |
2688 | * removing the expiring bpi above) | |
d62a17ae | 2689 | */ |
2690 | if (rfapiWithdrawEncapUpdateCachedUn(wcb->import_table, | |
2691 | wcb->node->info, em->node, | |
40381db7 | 2692 | em->bpi)) |
d62a17ae | 2693 | continue; |
2694 | ||
2695 | /* | |
2696 | * Build a list of unique VPN nodes referenced by these | |
2697 | * monitors. | |
2698 | * Use a skiplist for speed. | |
2699 | */ | |
2700 | skiplist_insert(vpn_node_sl, em->node, em->node); | |
2701 | } | |
2702 | ||
2703 | ||
2704 | /* | |
2705 | * for each VPN node referenced in the ENCAP monitors: | |
2706 | */ | |
fe08ba7e | 2707 | struct agg_node *rn; |
d62a17ae | 2708 | while (!skiplist_first(vpn_node_sl, (void **)&rn, NULL)) { |
2709 | if (!wcb->node->info) { | |
2710 | struct rfapi_monitor_vpn *moved; | |
2711 | ||
2712 | moved = rfapiMonitorMoveShorter(rn, 0); | |
2713 | if (moved) { | |
2714 | // rfapiDoRouteCallback(wcb->import_table, | |
2715 | // moved->node, moved); | |
2716 | rfapiMonitorMovedUp(wcb->import_table, rn, | |
2717 | moved->node, moved); | |
2718 | } | |
2719 | } else { | |
2720 | // rfapiDoRouteCallback(wcb->import_table, rn, NULL); | |
2721 | rfapiMonitorItNodeChanged(wcb->import_table, rn, NULL); | |
2722 | } | |
2723 | skiplist_delete_first(vpn_node_sl); | |
2724 | } | |
65efcfce LB |
2725 | |
2726 | done: | |
d62a17ae | 2727 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_ENCAP, 1); |
fe08ba7e | 2728 | agg_unlock_node(wcb->node); /* decr ref count */ |
d62a17ae | 2729 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); |
2730 | skiplist_free(vpn_node_sl); | |
65efcfce LB |
2731 | } |
2732 | ||
2733 | ||
2734 | /* | |
2735 | * Works for both VPN and ENCAP routes; timer_service_func is different | |
2736 | * in each case | |
2737 | */ | |
2738 | static void | |
d62a17ae | 2739 | rfapiBiStartWithdrawTimer(struct rfapi_import_table *import_table, |
40381db7 | 2740 | struct agg_node *rn, struct bgp_path_info *bpi, |
4b7e6066 | 2741 | afi_t afi, safi_t safi, |
cc9f21da | 2742 | void (*timer_service_func)(struct thread *)) |
65efcfce | 2743 | { |
d62a17ae | 2744 | uint32_t lifetime; |
2745 | struct rfapi_withdraw *wcb; | |
2746 | ||
40381db7 | 2747 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
a8fd6fde QY |
2748 | /* |
2749 | * Already on the path to being withdrawn, | |
2750 | * should already have a timer set up to | |
2751 | * delete it. | |
2752 | */ | |
2753 | vnc_zlog_debug_verbose( | |
2754 | "%s: already being withdrawn, do nothing", __func__); | |
2755 | return; | |
2756 | } | |
d62a17ae | 2757 | |
40381db7 | 2758 | rfapiGetVncLifetime(bpi->attr, &lifetime); |
d62a17ae | 2759 | vnc_zlog_debug_verbose("%s: VNC lifetime is %u", __func__, lifetime); |
2760 | ||
2761 | /* | |
2762 | * withdrawn routes get to hang around for a while | |
2763 | */ | |
40381db7 | 2764 | SET_FLAG(bpi->flags, BGP_PATH_REMOVED); |
d62a17ae | 2765 | |
2766 | /* set timer to remove the route later */ | |
2767 | lifetime = rfapiGetHolddownFromLifetime(lifetime); | |
2768 | vnc_zlog_debug_verbose("%s: using timeout %u", __func__, lifetime); | |
2769 | ||
2770 | /* | |
2771 | * Stash import_table, node, and info for use by timer | |
2772 | * service routine, which is supposed to free the wcb. | |
2773 | */ | |
2774 | wcb = XCALLOC(MTYPE_RFAPI_WITHDRAW, sizeof(struct rfapi_withdraw)); | |
d62a17ae | 2775 | wcb->node = rn; |
40381db7 | 2776 | wcb->info = bpi; |
d62a17ae | 2777 | wcb->import_table = import_table; |
40381db7 | 2778 | bgp_attr_intern(bpi->attr); |
d62a17ae | 2779 | |
2780 | if (VNC_DEBUG(VERBOSE)) { | |
2781 | vnc_zlog_debug_verbose( | |
40381db7 | 2782 | "%s: wcb values: node=%p, info=%p, import_table=%p (bpi follows)", |
d62a17ae | 2783 | __func__, wcb->node, wcb->info, wcb->import_table); |
40381db7 | 2784 | rfapiPrintBi(NULL, bpi); |
d62a17ae | 2785 | } |
2786 | ||
2787 | ||
40381db7 | 2788 | assert(bpi->extra); |
d62a17ae | 2789 | if (lifetime > UINT32_MAX / 1001) { |
2790 | /* sub-optimal case, but will probably never happen */ | |
40381db7 | 2791 | bpi->extra->vnc.import.timer = NULL; |
d62a17ae | 2792 | thread_add_timer(bm->master, timer_service_func, wcb, lifetime, |
40381db7 | 2793 | &bpi->extra->vnc.import.timer); |
d62a17ae | 2794 | } else { |
2795 | static uint32_t jitter; | |
2796 | uint32_t lifetime_msec; | |
2797 | ||
2798 | /* | |
2799 | * the goal here is to spread out the timers so they are | |
2800 | * sortable in the skip list | |
2801 | */ | |
2802 | if (++jitter >= 1000) | |
2803 | jitter = 0; | |
2804 | ||
2805 | lifetime_msec = (lifetime * 1000) + jitter; | |
2806 | ||
40381db7 | 2807 | bpi->extra->vnc.import.timer = NULL; |
d62a17ae | 2808 | thread_add_timer_msec(bm->master, timer_service_func, wcb, |
2809 | lifetime_msec, | |
40381db7 | 2810 | &bpi->extra->vnc.import.timer); |
d62a17ae | 2811 | } |
2812 | ||
1defdda8 | 2813 | /* re-sort route list (BGP_PATH_REMOVED routes are last) */ |
4b7e6066 | 2814 | if (((struct bgp_path_info *)rn->info)->next) { |
40381db7 DS |
2815 | rfapiBgpInfoDetach(rn, bpi); |
2816 | rfapiBgpInfoAttachSorted(rn, bpi, afi, safi); | |
d62a17ae | 2817 | } |
65efcfce LB |
2818 | } |
2819 | ||
2820 | ||
5a1ae2c2 DS |
2821 | typedef void(rfapi_bi_filtered_import_f)(struct rfapi_import_table *table, |
2822 | int action, struct peer *peer, | |
2823 | void *rfd, const struct prefix *prefix, | |
2824 | const struct prefix *aux_prefix, | |
2825 | afi_t afi, struct prefix_rd *prd, | |
2826 | struct attr *attr, uint8_t type, | |
2827 | uint8_t sub_type, uint32_t *label); | |
65efcfce LB |
2828 | |
2829 | ||
d62a17ae | 2830 | static void rfapiExpireEncapNow(struct rfapi_import_table *it, |
40381db7 | 2831 | struct agg_node *rn, struct bgp_path_info *bpi) |
65efcfce | 2832 | { |
d62a17ae | 2833 | struct rfapi_withdraw *wcb; |
2834 | struct thread t; | |
2835 | ||
2836 | /* | |
2837 | * pretend we're an expiring timer | |
2838 | */ | |
2839 | wcb = XCALLOC(MTYPE_RFAPI_WITHDRAW, sizeof(struct rfapi_withdraw)); | |
40381db7 | 2840 | wcb->info = bpi; |
d62a17ae | 2841 | wcb->node = rn; |
2842 | wcb->import_table = it; | |
2843 | memset(&t, 0, sizeof(t)); | |
2844 | t.arg = wcb; | |
2845 | rfapiWithdrawTimerEncap(&t); /* frees wcb */ | |
65efcfce LB |
2846 | } |
2847 | ||
d62a17ae | 2848 | static int rfapiGetNexthop(struct attr *attr, struct prefix *prefix) |
65efcfce | 2849 | { |
d62a17ae | 2850 | switch (BGP_MP_NEXTHOP_FAMILY(attr->mp_nexthop_len)) { |
2851 | case AF_INET: | |
2852 | prefix->family = AF_INET; | |
30360041 | 2853 | prefix->prefixlen = IPV4_MAX_BITLEN; |
d62a17ae | 2854 | prefix->u.prefix4 = attr->mp_nexthop_global_in; |
2855 | break; | |
2856 | case AF_INET6: | |
2857 | prefix->family = AF_INET6; | |
135e9bdb | 2858 | prefix->prefixlen = IPV6_MAX_BITLEN; |
d62a17ae | 2859 | prefix->u.prefix6 = attr->mp_nexthop_global; |
2860 | break; | |
2861 | default: | |
2862 | vnc_zlog_debug_verbose("%s: unknown attr->mp_nexthop_len %d", | |
2863 | __func__, attr->mp_nexthop_len); | |
2864 | return EINVAL; | |
2865 | } | |
2866 | return 0; | |
65efcfce LB |
2867 | } |
2868 | ||
d62a17ae | 2869 | /* |
9b6d8fcf | 2870 | * import a bgp_path_info if its route target list intersects with the |
65efcfce LB |
2871 | * import table's route target list |
2872 | */ | |
d62a17ae | 2873 | static void rfapiBgpInfoFilteredImportEncap( |
2874 | struct rfapi_import_table *import_table, int action, struct peer *peer, | |
2875 | void *rfd, /* set for looped back routes */ | |
5a1ae2c2 DS |
2876 | const struct prefix *p, |
2877 | const struct prefix *aux_prefix, /* Unused for encap routes */ | |
d62a17ae | 2878 | afi_t afi, struct prefix_rd *prd, |
9b6d8fcf | 2879 | struct attr *attr, /* part of bgp_path_info */ |
5a1ae2c2 | 2880 | uint8_t type, /* part of bgp_path_info */ |
9b6d8fcf DS |
2881 | uint8_t sub_type, /* part of bgp_path_info */ |
2882 | uint32_t *label) /* part of bgp_path_info */ | |
65efcfce | 2883 | { |
fe08ba7e DS |
2884 | struct agg_table *rt = NULL; |
2885 | struct agg_node *rn; | |
4b7e6066 | 2886 | struct bgp_path_info *info_new; |
40381db7 | 2887 | struct bgp_path_info *bpi; |
4b7e6066 | 2888 | struct bgp_path_info *next; |
d62a17ae | 2889 | char buf[BUFSIZ]; |
2890 | ||
40381db7 DS |
2891 | struct prefix p_firstbpi_old; |
2892 | struct prefix p_firstbpi_new; | |
d62a17ae | 2893 | int replacing = 0; |
2894 | const char *action_str = NULL; | |
2895 | struct prefix un_prefix; | |
2896 | ||
2897 | struct bgp *bgp; | |
2898 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
2899 | ||
2900 | switch (action) { | |
2901 | case FIF_ACTION_UPDATE: | |
2902 | action_str = "update"; | |
2903 | break; | |
2904 | case FIF_ACTION_WITHDRAW: | |
2905 | action_str = "withdraw"; | |
2906 | break; | |
2907 | case FIF_ACTION_KILL: | |
2908 | action_str = "kill"; | |
2909 | break; | |
2910 | default: | |
2911 | assert(0); | |
2912 | break; | |
2913 | } | |
2914 | ||
2915 | vnc_zlog_debug_verbose( | |
2916 | "%s: entry: %s: prefix %s/%d", __func__, action_str, | |
07380148 DA |
2917 | inet_ntop(p->family, &p->u.prefix, buf, sizeof(buf)), |
2918 | p->prefixlen); | |
d62a17ae | 2919 | |
40381db7 DS |
2920 | memset(&p_firstbpi_old, 0, sizeof(p_firstbpi_old)); |
2921 | memset(&p_firstbpi_new, 0, sizeof(p_firstbpi_new)); | |
d62a17ae | 2922 | |
2923 | if (action == FIF_ACTION_UPDATE) { | |
2924 | /* | |
2925 | * Compare rt lists. If no intersection, don't import this route | |
2926 | * On a withdraw, peer and RD are sufficient to determine if | |
2927 | * we should act. | |
2928 | */ | |
b53e67a3 | 2929 | if (!attr || !bgp_attr_get_ecommunity(attr)) { |
d62a17ae | 2930 | |
2931 | vnc_zlog_debug_verbose( | |
2932 | "%s: attr, extra, or ecommunity missing, not importing", | |
2933 | __func__); | |
2934 | return; | |
2935 | } | |
1e20238a | 2936 | #ifdef RFAPI_REQUIRE_ENCAP_BEEC |
b53e67a3 DA |
2937 | if (!rfapiEcommunitiesMatchBeec( |
2938 | bgp_attr_get_ecommunity(attr))) { | |
d62a17ae | 2939 | vnc_zlog_debug_verbose( |
2940 | "%s: it=%p: no match for BGP Encapsulation ecommunity", | |
2941 | __func__, import_table); | |
2942 | return; | |
2943 | } | |
65efcfce | 2944 | #endif |
b53e67a3 DA |
2945 | if (!rfapiEcommunitiesIntersect( |
2946 | import_table->rt_import_list, | |
2947 | bgp_attr_get_ecommunity(attr))) { | |
d62a17ae | 2948 | |
2949 | vnc_zlog_debug_verbose( | |
2950 | "%s: it=%p: no ecommunity intersection", | |
2951 | __func__, import_table); | |
2952 | return; | |
2953 | } | |
2954 | ||
2955 | /* | |
2956 | * Updates must also have a nexthop address | |
2957 | */ | |
2958 | memset(&un_prefix, 0, | |
2959 | sizeof(un_prefix)); /* keep valgrind happy */ | |
2960 | if (rfapiGetNexthop(attr, &un_prefix)) { | |
2961 | vnc_zlog_debug_verbose("%s: missing nexthop address", | |
2962 | __func__); | |
2963 | return; | |
2964 | } | |
2965 | } | |
2966 | ||
2967 | /* | |
2968 | * Figure out which radix tree the route would go into | |
2969 | */ | |
2970 | switch (afi) { | |
2971 | case AFI_IP: | |
2972 | case AFI_IP6: | |
2973 | rt = import_table->imported_encap[afi]; | |
2974 | break; | |
2975 | ||
58cf0823 DS |
2976 | case AFI_UNSPEC: |
2977 | case AFI_L2VPN: | |
2978 | case AFI_MAX: | |
450971aa | 2979 | flog_err(EC_LIB_DEVELOPMENT, "%s: bad afi %d", __func__, afi); |
d62a17ae | 2980 | return; |
2981 | } | |
2982 | ||
2983 | /* | |
fe08ba7e | 2984 | * agg_node_lookup returns a node only if there is at least |
d62a17ae | 2985 | * one route attached. |
2986 | */ | |
fe08ba7e | 2987 | rn = agg_node_lookup(rt, p); |
65efcfce | 2988 | |
1e20238a | 2989 | #ifdef DEBUG_ENCAP_MONITOR |
d62a17ae | 2990 | vnc_zlog_debug_verbose("%s: initial encap lookup(it=%p) rn=%p", |
2991 | __func__, import_table, rn); | |
65efcfce LB |
2992 | #endif |
2993 | ||
d62a17ae | 2994 | if (rn) { |
2995 | ||
2996 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, 1); | |
fe08ba7e | 2997 | agg_unlock_node(rn); /* undo lock in agg_node_lookup */ |
d62a17ae | 2998 | |
2999 | ||
3000 | /* | |
40381db7 | 3001 | * capture nexthop of first bpi |
d62a17ae | 3002 | */ |
3003 | if (rn->info) { | |
3004 | rfapiNexthop2Prefix( | |
4b7e6066 | 3005 | ((struct bgp_path_info *)(rn->info))->attr, |
40381db7 | 3006 | &p_firstbpi_old); |
d62a17ae | 3007 | } |
3008 | ||
40381db7 | 3009 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 3010 | |
3011 | /* | |
9b6d8fcf | 3012 | * Does this bgp_path_info refer to the same route |
d62a17ae | 3013 | * as we are trying to add? |
3014 | */ | |
40381db7 DS |
3015 | vnc_zlog_debug_verbose("%s: comparing BPI %p", __func__, |
3016 | bpi); | |
d62a17ae | 3017 | |
3018 | ||
3019 | /* | |
3020 | * Compare RDs | |
3021 | * | |
40381db7 DS |
3022 | * RD of import table bpi is in |
3023 | * bpi->extra->vnc.import.rd RD of info_orig is in prd | |
d62a17ae | 3024 | */ |
40381db7 DS |
3025 | if (!bpi->extra) { |
3026 | vnc_zlog_debug_verbose("%s: no bpi->extra", | |
d62a17ae | 3027 | __func__); |
3028 | continue; | |
3029 | } | |
3030 | if (prefix_cmp( | |
40381db7 | 3031 | (struct prefix *)&bpi->extra->vnc.import.rd, |
d62a17ae | 3032 | (struct prefix *)prd)) { |
3033 | ||
3034 | vnc_zlog_debug_verbose("%s: prd does not match", | |
3035 | __func__); | |
3036 | continue; | |
3037 | } | |
3038 | ||
3039 | /* | |
3040 | * Compare peers | |
3041 | */ | |
40381db7 | 3042 | if (bpi->peer != peer) { |
d62a17ae | 3043 | vnc_zlog_debug_verbose( |
3044 | "%s: peer does not match", __func__); | |
3045 | continue; | |
3046 | } | |
3047 | ||
40381db7 | 3048 | vnc_zlog_debug_verbose("%s: found matching bpi", |
d62a17ae | 3049 | __func__); |
3050 | ||
40381db7 | 3051 | /* Same route. Delete this bpi, replace with new one */ |
d62a17ae | 3052 | |
3053 | if (action == FIF_ACTION_WITHDRAW) { | |
3054 | ||
3055 | vnc_zlog_debug_verbose( | |
26a3ffd6 DS |
3056 | "%s: withdrawing at prefix %pRN", |
3057 | __func__, rn); | |
d62a17ae | 3058 | |
3059 | rfapiBiStartWithdrawTimer( | |
40381db7 | 3060 | import_table, rn, bpi, afi, SAFI_ENCAP, |
d62a17ae | 3061 | rfapiWithdrawTimerEncap); |
3062 | ||
3063 | } else { | |
3064 | vnc_zlog_debug_verbose( | |
26a3ffd6 | 3065 | "%s: %s at prefix %pRN", __func__, |
d62a17ae | 3066 | ((action == FIF_ACTION_KILL) |
3067 | ? "killing" | |
3068 | : "replacing"), | |
26a3ffd6 | 3069 | rn); |
d62a17ae | 3070 | |
3071 | /* | |
3072 | * If this route is waiting to be deleted | |
3073 | * because of | |
3074 | * a previous withdraw, we must cancel its | |
3075 | * timer. | |
3076 | */ | |
40381db7 DS |
3077 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
3078 | && bpi->extra->vnc.import.timer) { | |
c3aaa89a DS |
3079 | struct rfapi_withdraw *wcb = THREAD_ARG( |
3080 | bpi->extra->vnc.import.timer); | |
d62a17ae | 3081 | |
3082 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
c3aaa89a DS |
3083 | THREAD_OFF( |
3084 | bpi->extra->vnc.import.timer); | |
d62a17ae | 3085 | } |
3086 | ||
3087 | if (action == FIF_ACTION_UPDATE) { | |
40381db7 DS |
3088 | rfapiBgpInfoDetach(rn, bpi); |
3089 | rfapiBgpInfoFree(bpi); | |
d62a17ae | 3090 | replacing = 1; |
3091 | } else { | |
3092 | /* | |
3093 | * Kill: do export stuff when removing | |
40381db7 | 3094 | * bpi |
d62a17ae | 3095 | */ |
3096 | struct rfapi_withdraw *wcb; | |
3097 | struct thread t; | |
3098 | ||
3099 | /* | |
3100 | * pretend we're an expiring timer | |
3101 | */ | |
3102 | wcb = XCALLOC( | |
3103 | MTYPE_RFAPI_WITHDRAW, | |
3104 | sizeof(struct rfapi_withdraw)); | |
40381db7 | 3105 | wcb->info = bpi; |
d62a17ae | 3106 | wcb->node = rn; |
3107 | wcb->import_table = import_table; | |
3108 | memset(&t, 0, sizeof(t)); | |
3109 | t.arg = wcb; | |
3110 | rfapiWithdrawTimerEncap( | |
3111 | &t); /* frees wcb */ | |
3112 | } | |
3113 | } | |
3114 | ||
3115 | break; | |
3116 | } | |
3117 | } | |
3118 | ||
3119 | if (rn) | |
3120 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, replacing ? 1 : 0); | |
3121 | ||
3122 | if (action == FIF_ACTION_WITHDRAW || action == FIF_ACTION_KILL) | |
3123 | return; | |
3124 | ||
3125 | info_new = | |
3126 | rfapiBgpInfoCreate(attr, peer, rfd, prd, type, sub_type, NULL); | |
3127 | ||
3128 | if (rn) { | |
3129 | if (!replacing) | |
40381db7 | 3130 | agg_lock_node(rn); /* incr ref count for new BPI */ |
d62a17ae | 3131 | } else { |
fe08ba7e | 3132 | rn = agg_node_get(rt, p); |
d62a17ae | 3133 | } |
3134 | ||
26a3ffd6 DS |
3135 | vnc_zlog_debug_verbose("%s: (afi=%d, rn=%p) inserting at prefix %pRN", |
3136 | __func__, afi, rn, rn); | |
d62a17ae | 3137 | |
3138 | rfapiBgpInfoAttachSorted(rn, info_new, afi, SAFI_ENCAP); | |
3139 | ||
3140 | /* | |
3141 | * Delete holddown routes from same NVE. See details in | |
3142 | * rfapiBgpInfoFilteredImportVPN() | |
3143 | */ | |
40381db7 | 3144 | for (bpi = info_new->next; bpi; bpi = next) { |
d62a17ae | 3145 | |
3146 | struct prefix pfx_un; | |
3147 | int un_match = 0; | |
3148 | ||
40381db7 DS |
3149 | next = bpi->next; |
3150 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) | |
d62a17ae | 3151 | continue; |
3152 | ||
3153 | /* | |
3154 | * We already match the VN address (it is the prefix | |
3155 | * of the route node) | |
3156 | */ | |
3157 | ||
40381db7 | 3158 | if (!rfapiGetNexthop(bpi->attr, &pfx_un) |
d62a17ae | 3159 | && prefix_same(&pfx_un, &un_prefix)) { |
3160 | ||
3161 | un_match = 1; | |
3162 | } | |
3163 | ||
3164 | if (!un_match) | |
3165 | continue; | |
3166 | ||
3167 | vnc_zlog_debug_verbose( | |
40381db7 | 3168 | "%s: removing holddown bpi matching NVE of new route", |
d62a17ae | 3169 | __func__); |
40381db7 | 3170 | if (bpi->extra->vnc.import.timer) { |
c3aaa89a DS |
3171 | struct rfapi_withdraw *wcb = |
3172 | THREAD_ARG(bpi->extra->vnc.import.timer); | |
d62a17ae | 3173 | |
3174 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
c3aaa89a | 3175 | THREAD_OFF(bpi->extra->vnc.import.timer); |
d62a17ae | 3176 | } |
40381db7 | 3177 | rfapiExpireEncapNow(import_table, rn, bpi); |
d62a17ae | 3178 | } |
3179 | ||
4b7e6066 | 3180 | rfapiNexthop2Prefix(((struct bgp_path_info *)(rn->info))->attr, |
40381db7 | 3181 | &p_firstbpi_new); |
d62a17ae | 3182 | |
3183 | /* | |
3184 | * If the nexthop address of the selected Encap route (i.e., | |
3185 | * the UN address) has changed, then we must update the VPN | |
3186 | * routes that refer to this Encap route and possibly force | |
3187 | * rfapi callbacks. | |
3188 | */ | |
40381db7 | 3189 | if (rfapiAttrNexthopAddrDifferent(&p_firstbpi_old, &p_firstbpi_new)) { |
d62a17ae | 3190 | |
3191 | struct rfapi_monitor_encap *m; | |
3192 | struct rfapi_monitor_encap *mnext; | |
3193 | ||
fe08ba7e | 3194 | struct agg_node *referenced_vpn_prefix; |
d62a17ae | 3195 | |
3196 | /* | |
3197 | * Optimized approach: build radix tree on the fly to | |
3198 | * hold list of VPN nodes referenced by the ENCAP monitors | |
3199 | * | |
3200 | * The nodes in this table correspond to prefixes of VPN routes. | |
3201 | * The "info" pointer of the node points to a chain of | |
3202 | * struct rfapi_monitor_encap, each of which refers to a | |
3203 | * specific VPN node. | |
3204 | */ | |
fe08ba7e | 3205 | struct agg_table *referenced_vpn_table; |
d62a17ae | 3206 | |
fe08ba7e | 3207 | referenced_vpn_table = agg_table_init(); |
d62a17ae | 3208 | |
3209 | /* | |
3210 | * iterate over the set of monitors at this ENCAP node. | |
3211 | */ | |
1e20238a | 3212 | #ifdef DEBUG_ENCAP_MONITOR |
d62a17ae | 3213 | vnc_zlog_debug_verbose("%s: examining monitors at rn=%p", |
3214 | __func__, rn); | |
65efcfce | 3215 | #endif |
d62a17ae | 3216 | for (m = RFAPI_MONITOR_ENCAP(rn); m; m = m->next) { |
26a3ffd6 | 3217 | const struct prefix *p; |
d62a17ae | 3218 | |
3219 | /* | |
40381db7 | 3220 | * For each referenced bpi/route, copy the ENCAP route's |
d62a17ae | 3221 | * nexthop to the VPN route's cached UN address field |
3222 | * and set | |
3223 | * the address family of the cached UN address field. | |
3224 | */ | |
40381db7 DS |
3225 | rfapiCopyUnEncap2VPN(info_new, m->bpi); |
3226 | if (!CHECK_FLAG(m->bpi->flags, BGP_PATH_VALID)) { | |
3227 | SET_FLAG(m->bpi->flags, BGP_PATH_VALID); | |
3228 | if (VALID_INTERIOR_TYPE(m->bpi->type)) | |
d62a17ae | 3229 | RFAPI_MONITOR_EXTERIOR(m->node) |
3230 | ->valid_interior_count++; | |
3231 | vnc_import_bgp_exterior_add_route_interior( | |
40381db7 | 3232 | bgp, import_table, m->node, m->bpi); |
d62a17ae | 3233 | } |
3234 | ||
3235 | /* | |
3236 | * Build a list of unique VPN nodes referenced by these | |
3237 | * monitors | |
3238 | * | |
3239 | * There could be more than one VPN node here with a | |
3240 | * given | |
3241 | * prefix. Those are currently in an unsorted linear | |
3242 | * list | |
3243 | * per prefix. | |
3244 | */ | |
26a3ffd6 | 3245 | p = agg_node_get_prefix(m->node); |
fe08ba7e | 3246 | referenced_vpn_prefix = |
26a3ffd6 | 3247 | agg_node_get(referenced_vpn_table, p); |
d62a17ae | 3248 | assert(referenced_vpn_prefix); |
3249 | for (mnext = referenced_vpn_prefix->info; mnext; | |
3250 | mnext = mnext->next) { | |
3251 | ||
3252 | if (mnext->node == m->node) | |
3253 | break; | |
3254 | } | |
3255 | ||
3256 | if (mnext) { | |
3257 | /* | |
3258 | * already have an entry for this VPN node | |
3259 | */ | |
fe08ba7e | 3260 | agg_unlock_node(referenced_vpn_prefix); |
d62a17ae | 3261 | } else { |
3262 | mnext = XCALLOC( | |
3263 | MTYPE_RFAPI_MONITOR_ENCAP, | |
3264 | sizeof(struct rfapi_monitor_encap)); | |
d62a17ae | 3265 | mnext->node = m->node; |
3266 | mnext->next = referenced_vpn_prefix->info; | |
3267 | referenced_vpn_prefix->info = mnext; | |
3268 | } | |
3269 | } | |
3270 | ||
3271 | /* | |
3272 | * for each VPN node referenced in the ENCAP monitors: | |
3273 | */ | |
fe08ba7e DS |
3274 | for (referenced_vpn_prefix = |
3275 | agg_route_top(referenced_vpn_table); | |
3276 | referenced_vpn_prefix; | |
3277 | referenced_vpn_prefix = | |
3278 | agg_route_next(referenced_vpn_prefix)) { | |
d62a17ae | 3279 | |
3280 | while ((m = referenced_vpn_prefix->info)) { | |
3281 | ||
fe08ba7e | 3282 | struct agg_node *n; |
d62a17ae | 3283 | |
3284 | rfapiMonitorMoveLonger(m->node); | |
fe08ba7e | 3285 | for (n = m->node; n; n = agg_node_parent(n)) { |
d62a17ae | 3286 | // rfapiDoRouteCallback(import_table, n, |
3287 | // NULL); | |
3288 | } | |
3289 | rfapiMonitorItNodeChanged(import_table, m->node, | |
3290 | NULL); | |
3291 | ||
3292 | referenced_vpn_prefix->info = m->next; | |
fe08ba7e | 3293 | agg_unlock_node(referenced_vpn_prefix); |
d62a17ae | 3294 | XFREE(MTYPE_RFAPI_MONITOR_ENCAP, m); |
3295 | } | |
3296 | } | |
fe08ba7e | 3297 | agg_table_finish(referenced_vpn_table); |
d62a17ae | 3298 | } |
3299 | ||
3300 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, 0); | |
65efcfce LB |
3301 | } |
3302 | ||
d62a17ae | 3303 | static void rfapiExpireVpnNow(struct rfapi_import_table *it, |
40381db7 | 3304 | struct agg_node *rn, struct bgp_path_info *bpi, |
d62a17ae | 3305 | int lockoffset) |
65efcfce | 3306 | { |
d62a17ae | 3307 | struct rfapi_withdraw *wcb; |
3308 | struct thread t; | |
3309 | ||
3310 | /* | |
3311 | * pretend we're an expiring timer | |
3312 | */ | |
3313 | wcb = XCALLOC(MTYPE_RFAPI_WITHDRAW, sizeof(struct rfapi_withdraw)); | |
40381db7 | 3314 | wcb->info = bpi; |
d62a17ae | 3315 | wcb->node = rn; |
3316 | wcb->import_table = it; | |
3317 | wcb->lockoffset = lockoffset; | |
3318 | memset(&t, 0, sizeof(t)); | |
3319 | t.arg = wcb; | |
3320 | rfapiWithdrawTimerVPN(&t); /* frees wcb */ | |
65efcfce LB |
3321 | } |
3322 | ||
3323 | ||
d62a17ae | 3324 | /* |
9b6d8fcf | 3325 | * import a bgp_path_info if its route target list intersects with the |
65efcfce LB |
3326 | * import table's route target list |
3327 | */ | |
d62a17ae | 3328 | void rfapiBgpInfoFilteredImportVPN( |
3329 | struct rfapi_import_table *import_table, int action, struct peer *peer, | |
3330 | void *rfd, /* set for looped back routes */ | |
5a1ae2c2 DS |
3331 | const struct prefix *p, |
3332 | const struct prefix *aux_prefix, /* AFI_L2VPN: optional IP */ | |
d62a17ae | 3333 | afi_t afi, struct prefix_rd *prd, |
9b6d8fcf | 3334 | struct attr *attr, /* part of bgp_path_info */ |
5a1ae2c2 | 3335 | uint8_t type, /* part of bgp_path_info */ |
9b6d8fcf DS |
3336 | uint8_t sub_type, /* part of bgp_path_info */ |
3337 | uint32_t *label) /* part of bgp_path_info */ | |
65efcfce | 3338 | { |
fe08ba7e DS |
3339 | struct agg_table *rt = NULL; |
3340 | struct agg_node *rn; | |
3341 | struct agg_node *n; | |
4b7e6066 | 3342 | struct bgp_path_info *info_new; |
40381db7 | 3343 | struct bgp_path_info *bpi; |
4b7e6066 | 3344 | struct bgp_path_info *next; |
d62a17ae | 3345 | char buf[BUFSIZ]; |
3346 | struct prefix vn_prefix; | |
3347 | struct prefix un_prefix; | |
3348 | int un_prefix_valid = 0; | |
fe08ba7e | 3349 | struct agg_node *ern; |
d62a17ae | 3350 | int replacing = 0; |
3351 | int original_had_routes = 0; | |
3352 | struct prefix original_nexthop; | |
3353 | const char *action_str = NULL; | |
3354 | int is_it_ce = 0; | |
3355 | ||
3356 | struct bgp *bgp; | |
3357 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
3358 | ||
3359 | switch (action) { | |
3360 | case FIF_ACTION_UPDATE: | |
3361 | action_str = "update"; | |
3362 | break; | |
3363 | case FIF_ACTION_WITHDRAW: | |
3364 | action_str = "withdraw"; | |
3365 | break; | |
3366 | case FIF_ACTION_KILL: | |
3367 | action_str = "kill"; | |
3368 | break; | |
3369 | default: | |
3370 | assert(0); | |
3371 | break; | |
3372 | } | |
3373 | ||
3374 | if (import_table == bgp->rfapi->it_ce) | |
3375 | is_it_ce = 1; | |
3376 | ||
3377 | vnc_zlog_debug_verbose("%s: entry: %s%s: prefix %s/%d: it %p, afi %s", | |
3378 | __func__, (is_it_ce ? "CE-IT " : ""), action_str, | |
3379 | rfapi_ntop(p->family, &p->u.prefix, buf, BUFSIZ), | |
3380 | p->prefixlen, import_table, afi2str(afi)); | |
3381 | ||
3382 | VNC_ITRCCK; | |
3383 | ||
3384 | /* | |
3385 | * Compare rt lists. If no intersection, don't import this route | |
3386 | * On a withdraw, peer and RD are sufficient to determine if | |
3387 | * we should act. | |
3388 | */ | |
3389 | if (action == FIF_ACTION_UPDATE) { | |
b53e67a3 | 3390 | if (!attr || !bgp_attr_get_ecommunity(attr)) { |
d62a17ae | 3391 | |
3392 | vnc_zlog_debug_verbose( | |
3393 | "%s: attr, extra, or ecommunity missing, not importing", | |
3394 | __func__); | |
3395 | return; | |
3396 | } | |
b53e67a3 DA |
3397 | if ((import_table != bgp->rfapi->it_ce) && |
3398 | !rfapiEcommunitiesIntersect( | |
3399 | import_table->rt_import_list, | |
3400 | bgp_attr_get_ecommunity(attr))) { | |
d62a17ae | 3401 | |
3402 | vnc_zlog_debug_verbose( | |
3403 | "%s: it=%p: no ecommunity intersection", | |
3404 | __func__, import_table); | |
3405 | return; | |
3406 | } | |
3407 | ||
3408 | memset(&vn_prefix, 0, | |
3409 | sizeof(vn_prefix)); /* keep valgrind happy */ | |
3410 | if (rfapiGetNexthop(attr, &vn_prefix)) { | |
3411 | /* missing nexthop address would be a bad, bad thing */ | |
3412 | vnc_zlog_debug_verbose("%s: missing nexthop", __func__); | |
3413 | return; | |
3414 | } | |
3415 | } | |
3416 | ||
3417 | /* | |
3418 | * Figure out which radix tree the route would go into | |
3419 | */ | |
3420 | switch (afi) { | |
3421 | case AFI_IP: | |
3422 | case AFI_IP6: | |
3423 | case AFI_L2VPN: | |
3424 | rt = import_table->imported_vpn[afi]; | |
3425 | break; | |
3426 | ||
58cf0823 DS |
3427 | case AFI_UNSPEC: |
3428 | case AFI_MAX: | |
450971aa | 3429 | flog_err(EC_LIB_DEVELOPMENT, "%s: bad afi %d", __func__, afi); |
d62a17ae | 3430 | return; |
3431 | } | |
3432 | ||
3433 | /* clear it */ | |
3434 | memset(&original_nexthop, 0, sizeof(original_nexthop)); | |
3435 | ||
3436 | /* | |
fe08ba7e | 3437 | * agg_node_lookup returns a node only if there is at least |
d62a17ae | 3438 | * one route attached. |
3439 | */ | |
fe08ba7e | 3440 | rn = agg_node_lookup(rt, p); |
d62a17ae | 3441 | |
3442 | vnc_zlog_debug_verbose("%s: rn=%p", __func__, rn); | |
3443 | ||
3444 | if (rn) { | |
3445 | ||
3446 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, 1); | |
fe08ba7e | 3447 | agg_unlock_node(rn); /* undo lock in agg_node_lookup */ |
d62a17ae | 3448 | |
3449 | if (rn->info) | |
3450 | original_had_routes = 1; | |
3451 | ||
3452 | if (VNC_DEBUG(VERBOSE)) { | |
3453 | vnc_zlog_debug_verbose("%s: showing IT node on entry", | |
3454 | __func__); | |
3455 | rfapiShowItNode(NULL, rn); /* debug */ | |
3456 | } | |
3457 | ||
3458 | /* | |
3459 | * Look for same route (will have same RD and peer) | |
3460 | */ | |
40381db7 | 3461 | bpi = rfapiItBiIndexSearch(rn, prd, peer, aux_prefix); |
d62a17ae | 3462 | |
40381db7 | 3463 | if (bpi) { |
d62a17ae | 3464 | |
3465 | /* | |
3466 | * This was an old test when we iterated over the | |
40381db7 | 3467 | * BPIs linearly. Since we're now looking up with |
d62a17ae | 3468 | * RD and peer, comparing types should not be |
3469 | * needed. Changed to assertion. | |
3470 | * | |
3471 | * Compare types. Doing so prevents a RFP-originated | |
3472 | * route from matching an imported route, for example. | |
3473 | */ | |
40381db7 | 3474 | if (VNC_DEBUG(VERBOSE) && bpi->type != type) |
3af8cb57 | 3475 | /* should be handled by RDs, but warn for now */ |
40381db7 DS |
3476 | zlog_warn("%s: type mismatch! (bpi=%d, arg=%d)", |
3477 | __func__, bpi->type, type); | |
d62a17ae | 3478 | |
40381db7 | 3479 | vnc_zlog_debug_verbose("%s: found matching bpi", |
d62a17ae | 3480 | __func__); |
3481 | ||
3482 | /* | |
3483 | * In the special CE table, withdrawals occur without | |
3484 | * holddown | |
3485 | */ | |
3486 | if (import_table == bgp->rfapi->it_ce) { | |
40381db7 | 3487 | vnc_direct_bgp_del_route_ce(bgp, rn, bpi); |
d62a17ae | 3488 | if (action == FIF_ACTION_WITHDRAW) |
3489 | action = FIF_ACTION_KILL; | |
3490 | } | |
3491 | ||
3492 | if (action == FIF_ACTION_WITHDRAW) { | |
3493 | ||
40381db7 DS |
3494 | int washolddown = CHECK_FLAG(bpi->flags, |
3495 | BGP_PATH_REMOVED); | |
d62a17ae | 3496 | |
3497 | vnc_zlog_debug_verbose( | |
26a3ffd6 DS |
3498 | "%s: withdrawing at prefix %pRN%s", |
3499 | __func__, rn, | |
d62a17ae | 3500 | (washolddown |
3501 | ? " (already being withdrawn)" | |
3502 | : "")); | |
3503 | ||
3504 | VNC_ITRCCK; | |
3505 | if (!washolddown) { | |
3506 | rfapiBiStartWithdrawTimer( | |
40381db7 | 3507 | import_table, rn, bpi, afi, |
d62a17ae | 3508 | SAFI_MPLS_VPN, |
3509 | rfapiWithdrawTimerVPN); | |
3510 | ||
3511 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 3512 | bpi, import_table, afi, -1); |
d62a17ae | 3513 | import_table->holddown_count[afi] += 1; |
3514 | } | |
3515 | VNC_ITRCCK; | |
3516 | } else { | |
3517 | vnc_zlog_debug_verbose( | |
26a3ffd6 | 3518 | "%s: %s at prefix %pRN", __func__, |
d62a17ae | 3519 | ((action == FIF_ACTION_KILL) |
3520 | ? "killing" | |
3521 | : "replacing"), | |
26a3ffd6 | 3522 | rn); |
d62a17ae | 3523 | |
3524 | /* | |
3525 | * If this route is waiting to be deleted | |
3526 | * because of | |
3527 | * a previous withdraw, we must cancel its | |
3528 | * timer. | |
3529 | */ | |
40381db7 DS |
3530 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
3531 | && bpi->extra->vnc.import.timer) { | |
c3aaa89a DS |
3532 | struct rfapi_withdraw *wcb = THREAD_ARG( |
3533 | bpi->extra->vnc.import.timer); | |
d62a17ae | 3534 | |
3535 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
c3aaa89a DS |
3536 | THREAD_OFF( |
3537 | bpi->extra->vnc.import.timer); | |
d62a17ae | 3538 | |
3539 | import_table->holddown_count[afi] -= 1; | |
3540 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 3541 | bpi, import_table, afi, 1); |
d62a17ae | 3542 | } |
3543 | /* | |
3544 | * decrement remote count (if route is remote) | |
3545 | * because | |
3546 | * we are going to remove it below | |
3547 | */ | |
40381db7 DS |
3548 | RFAPI_UPDATE_ITABLE_COUNT(bpi, import_table, |
3549 | afi, -1); | |
d62a17ae | 3550 | if (action == FIF_ACTION_UPDATE) { |
3551 | replacing = 1; | |
3552 | ||
3553 | /* | |
3554 | * make copy of original nexthop so we | |
3555 | * can see if it changed | |
3556 | */ | |
40381db7 | 3557 | rfapiGetNexthop(bpi->attr, |
d62a17ae | 3558 | &original_nexthop); |
3559 | ||
3560 | /* | |
40381db7 | 3561 | * remove bpi without doing any export |
d62a17ae | 3562 | * processing |
3563 | */ | |
40381db7 | 3564 | if (CHECK_FLAG(bpi->flags, |
1defdda8 | 3565 | BGP_PATH_VALID) |
40381db7 | 3566 | && VALID_INTERIOR_TYPE(bpi->type)) |
d62a17ae | 3567 | RFAPI_MONITOR_EXTERIOR(rn) |
3568 | ->valid_interior_count--; | |
40381db7 DS |
3569 | rfapiItBiIndexDel(rn, bpi); |
3570 | rfapiBgpInfoDetach(rn, bpi); | |
3571 | rfapiMonitorEncapDelete(bpi); | |
d62a17ae | 3572 | vnc_import_bgp_exterior_del_route_interior( |
40381db7 DS |
3573 | bgp, import_table, rn, bpi); |
3574 | rfapiBgpInfoFree(bpi); | |
d62a17ae | 3575 | } else { |
3576 | /* Kill */ | |
3577 | /* | |
40381db7 | 3578 | * remove bpi and do export processing |
d62a17ae | 3579 | */ |
3580 | import_table->holddown_count[afi] += 1; | |
40381db7 | 3581 | rfapiExpireVpnNow(import_table, rn, bpi, |
d62a17ae | 3582 | 0); |
3583 | } | |
3584 | } | |
3585 | } | |
3586 | } | |
3587 | ||
3588 | if (rn) | |
3589 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, replacing ? 1 : 0); | |
3590 | ||
3591 | if (action == FIF_ACTION_WITHDRAW || action == FIF_ACTION_KILL) { | |
3592 | VNC_ITRCCK; | |
3593 | return; | |
3594 | } | |
3595 | ||
3596 | info_new = | |
3597 | rfapiBgpInfoCreate(attr, peer, rfd, prd, type, sub_type, label); | |
3598 | ||
3599 | /* | |
3600 | * lookup un address in encap table | |
3601 | */ | |
fe08ba7e | 3602 | ern = agg_node_match(import_table->imported_encap[afi], &vn_prefix); |
d62a17ae | 3603 | if (ern) { |
3604 | rfapiCopyUnEncap2VPN(ern->info, info_new); | |
fe08ba7e | 3605 | agg_unlock_node(ern); /* undo lock in route_note_match */ |
d62a17ae | 3606 | } else { |
d62a17ae | 3607 | /* Not a big deal, just means VPN route got here first */ |
2dbe669b DA |
3608 | vnc_zlog_debug_verbose("%s: no encap route for vn addr %pFX", |
3609 | __func__, &vn_prefix); | |
c7ca5ccf | 3610 | info_new->extra->vnc.import.un_family = AF_UNSPEC; |
d62a17ae | 3611 | } |
3612 | ||
3613 | if (rn) { | |
3614 | if (!replacing) | |
fe08ba7e | 3615 | agg_lock_node(rn); |
d62a17ae | 3616 | } else { |
3617 | /* | |
3618 | * No need to increment reference count, so only "get" | |
3619 | * if the node is not there already | |
3620 | */ | |
fe08ba7e | 3621 | rn = agg_node_get(rt, p); |
d62a17ae | 3622 | } |
3623 | ||
3624 | /* | |
3625 | * For ethernet routes, if there is an accompanying IP address, | |
40381db7 | 3626 | * save it in the bpi |
d62a17ae | 3627 | */ |
3628 | if ((AFI_L2VPN == afi) && aux_prefix) { | |
3629 | ||
40381db7 DS |
3630 | vnc_zlog_debug_verbose("%s: setting BPI's aux_prefix", |
3631 | __func__); | |
d62a17ae | 3632 | info_new->extra->vnc.import.aux_prefix = *aux_prefix; |
3633 | } | |
3634 | ||
26a3ffd6 | 3635 | vnc_zlog_debug_verbose("%s: inserting bpi %p at prefix %pRN #%d", |
c10e14e9 DS |
3636 | __func__, info_new, rn, |
3637 | agg_node_get_lock_count(rn)); | |
d62a17ae | 3638 | |
3639 | rfapiBgpInfoAttachSorted(rn, info_new, afi, SAFI_MPLS_VPN); | |
3640 | rfapiItBiIndexAdd(rn, info_new); | |
3641 | if (!rfapiGetUnAddrOfVpnBi(info_new, NULL)) { | |
3642 | if (VALID_INTERIOR_TYPE(info_new->type)) | |
3643 | RFAPI_MONITOR_EXTERIOR(rn)->valid_interior_count++; | |
1defdda8 | 3644 | SET_FLAG(info_new->flags, BGP_PATH_VALID); |
d62a17ae | 3645 | } |
3646 | RFAPI_UPDATE_ITABLE_COUNT(info_new, import_table, afi, 1); | |
3647 | vnc_import_bgp_exterior_add_route_interior(bgp, import_table, rn, | |
3648 | info_new); | |
3649 | ||
3650 | if (import_table == bgp->rfapi->it_ce) | |
3651 | vnc_direct_bgp_add_route_ce(bgp, rn, info_new); | |
3652 | ||
3653 | if (VNC_DEBUG(VERBOSE)) { | |
3654 | vnc_zlog_debug_verbose("%s: showing IT node", __func__); | |
3655 | rfapiShowItNode(NULL, rn); /* debug */ | |
3656 | } | |
3657 | ||
3658 | rfapiMonitorEncapAdd(import_table, &vn_prefix, rn, info_new); | |
3659 | ||
3660 | if (!rfapiGetUnAddrOfVpnBi(info_new, &un_prefix)) { | |
3661 | ||
3662 | /* | |
3663 | * if we have a valid UN address (either via Encap route | |
3664 | * or via tunnel attribute), then we should attempt | |
3665 | * to move any monitors at less-specific nodes to this node | |
3666 | */ | |
3667 | rfapiMonitorMoveLonger(rn); | |
3668 | ||
3669 | un_prefix_valid = 1; | |
3670 | } | |
3671 | ||
3672 | /* | |
3673 | * 101129 Enhancement: if we add a route (implication: it is not | |
3674 | * in holddown), delete all other routes from this nve at this | |
3675 | * node that are in holddown, regardless of peer. | |
3676 | * | |
3677 | * Reasons it's OK to do that: | |
3678 | * | |
3679 | * - if the holddown route being deleted originally came from BGP VPN, | |
3680 | * it is already gone from BGP (implication of holddown), so there | |
3681 | * won't be any added inconsistency with the BGP RIB. | |
3682 | * | |
3683 | * - once a fresh route is added at a prefix, any routes in holddown | |
3684 | * at that prefix will not show up in RFP responses, so deleting | |
3685 | * the holddown routes won't affect the contents of responses. | |
3686 | * | |
3687 | * - lifetimes are supposed to be consistent, so there should not | |
3688 | * be a case where the fresh route has a shorter lifetime than | |
3689 | * the holddown route, so we don't expect the fresh route to | |
3690 | * disappear and complete its holddown time before the existing | |
3691 | * holddown routes time out. Therefore, we won't have a situation | |
3692 | * where we expect the existing holddown routes to be hidden and | |
3693 | * then to reappear sometime later (as holddown routes) in a | |
3694 | * RFP response. | |
3695 | * | |
3696 | * Among other things, this would enable us to skirt the problem | |
3697 | * of local holddown routes that refer to NVE descriptors that | |
3698 | * have already been closed (if the same NVE triggers a subsequent | |
3699 | * rfapi_open(), the new peer is different and doesn't match the | |
3700 | * peer of the holddown route, so the stale holddown route still | |
3701 | * hangs around until it times out instead of just being replaced | |
3702 | * by the fresh route). | |
3703 | */ | |
3704 | /* | |
40381db7 | 3705 | * We know that the new bpi will have been inserted before any routes |
d62a17ae | 3706 | * in holddown, so we can skip any that came before it |
3707 | */ | |
40381db7 | 3708 | for (bpi = info_new->next; bpi; bpi = next) { |
d62a17ae | 3709 | |
3710 | struct prefix pfx_vn; | |
3711 | struct prefix pfx_un; | |
3712 | int un_match = 0; | |
3713 | int remote_peer_match = 0; | |
3714 | ||
40381db7 | 3715 | next = bpi->next; |
d62a17ae | 3716 | |
3717 | /* | |
3718 | * Must be holddown | |
3719 | */ | |
40381db7 | 3720 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) |
d62a17ae | 3721 | continue; |
3722 | ||
3723 | /* | |
3724 | * Must match VN address (nexthop of VPN route) | |
3725 | */ | |
40381db7 | 3726 | if (rfapiGetNexthop(bpi->attr, &pfx_vn)) |
d62a17ae | 3727 | continue; |
3728 | if (!prefix_same(&pfx_vn, &vn_prefix)) | |
3729 | continue; | |
3730 | ||
3731 | if (un_prefix_valid && /* new route UN addr */ | |
40381db7 | 3732 | !rfapiGetUnAddrOfVpnBi(bpi, &pfx_un) |
d62a17ae | 3733 | && /* old route UN addr */ |
3734 | prefix_same(&pfx_un, &un_prefix)) { /* compare */ | |
3735 | un_match = 1; | |
3736 | } | |
40381db7 DS |
3737 | if (!RFAPI_LOCAL_BI(bpi) && !RFAPI_LOCAL_BI(info_new) |
3738 | && sockunion_same(&bpi->peer->su, &info_new->peer->su)) { | |
d62a17ae | 3739 | /* old & new are both remote, same peer */ |
3740 | remote_peer_match = 1; | |
3741 | } | |
3742 | ||
80c6a472 | 3743 | if (!un_match && !remote_peer_match) |
d62a17ae | 3744 | continue; |
3745 | ||
3746 | vnc_zlog_debug_verbose( | |
40381db7 | 3747 | "%s: removing holddown bpi matching NVE of new route", |
d62a17ae | 3748 | __func__); |
40381db7 | 3749 | if (bpi->extra->vnc.import.timer) { |
c3aaa89a DS |
3750 | struct rfapi_withdraw *wcb = |
3751 | THREAD_ARG(bpi->extra->vnc.import.timer); | |
d62a17ae | 3752 | |
3753 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
c3aaa89a | 3754 | THREAD_OFF(bpi->extra->vnc.import.timer); |
d62a17ae | 3755 | } |
40381db7 | 3756 | rfapiExpireVpnNow(import_table, rn, bpi, 0); |
d62a17ae | 3757 | } |
3758 | ||
3759 | if (!original_had_routes) { | |
3760 | /* | |
3761 | * We went from 0 usable routes to 1 usable route. Perform the | |
3762 | * "Adding a Route" export process. | |
3763 | */ | |
3764 | vnc_direct_bgp_add_prefix(bgp, import_table, rn); | |
3765 | vnc_zebra_add_prefix(bgp, import_table, rn); | |
3766 | } else { | |
3767 | /* | |
3768 | * Check for nexthop change event | |
3769 | * Note: the prefix_same() test below detects two situations: | |
3770 | * 1. route is replaced, new route has different nexthop | |
3771 | * 2. new route is added (original_nexthop is 0) | |
3772 | */ | |
3773 | struct prefix new_nexthop; | |
3774 | ||
3775 | rfapiGetNexthop(attr, &new_nexthop); | |
3776 | if (!prefix_same(&original_nexthop, &new_nexthop)) { | |
3777 | /* | |
3778 | * nexthop change event | |
3779 | * vnc_direct_bgp_add_prefix() will recompute VN addr | |
3780 | * ecommunity | |
3781 | */ | |
3782 | vnc_direct_bgp_add_prefix(bgp, import_table, rn); | |
3783 | } | |
3784 | } | |
3785 | ||
3786 | if (!(bgp->rfapi_cfg->flags & BGP_VNC_CONFIG_CALLBACK_DISABLE)) { | |
fe08ba7e | 3787 | for (n = rn; n; n = agg_node_parent(n)) { |
d62a17ae | 3788 | // rfapiDoRouteCallback(import_table, n, NULL); |
3789 | } | |
3790 | rfapiMonitorItNodeChanged(import_table, rn, NULL); | |
3791 | } | |
3792 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, 0); | |
3793 | VNC_ITRCCK; | |
65efcfce LB |
3794 | } |
3795 | ||
21cf6b21 VJ |
3796 | static void rfapiBgpInfoFilteredImportBadSafi( |
3797 | struct rfapi_import_table *import_table, int action, struct peer *peer, | |
3798 | void *rfd, /* set for looped back routes */ | |
5a1ae2c2 DS |
3799 | const struct prefix *p, |
3800 | const struct prefix *aux_prefix, /* AFI_L2VPN: optional IP */ | |
21cf6b21 | 3801 | afi_t afi, struct prefix_rd *prd, |
9b6d8fcf | 3802 | struct attr *attr, /* part of bgp_path_info */ |
5a1ae2c2 | 3803 | uint8_t type, /* part of bgp_path_info */ |
9b6d8fcf DS |
3804 | uint8_t sub_type, /* part of bgp_path_info */ |
3805 | uint32_t *label) /* part of bgp_path_info */ | |
21cf6b21 VJ |
3806 | { |
3807 | vnc_zlog_debug_verbose("%s: Error, bad safi", __func__); | |
3808 | } | |
3809 | ||
65efcfce | 3810 | static rfapi_bi_filtered_import_f * |
d62a17ae | 3811 | rfapiBgpInfoFilteredImportFunction(safi_t safi) |
65efcfce | 3812 | { |
d62a17ae | 3813 | switch (safi) { |
3814 | case SAFI_MPLS_VPN: | |
3815 | return rfapiBgpInfoFilteredImportVPN; | |
3816 | ||
3817 | case SAFI_ENCAP: | |
3818 | return rfapiBgpInfoFilteredImportEncap; | |
5c525538 | 3819 | |
58cf0823 DS |
3820 | case SAFI_UNSPEC: |
3821 | case SAFI_UNICAST: | |
3822 | case SAFI_MULTICAST: | |
3823 | case SAFI_EVPN: | |
3824 | case SAFI_LABELED_UNICAST: | |
3825 | case SAFI_FLOWSPEC: | |
3826 | case SAFI_MAX: | |
5c525538 | 3827 | /* not expected */ |
1c50c1c0 | 3828 | flog_err(EC_LIB_DEVELOPMENT, "%s: bad safi %d", __func__, safi); |
21cf6b21 | 3829 | return rfapiBgpInfoFilteredImportBadSafi; |
d62a17ae | 3830 | } |
58cf0823 DS |
3831 | |
3832 | assert(!"Reached end of function when we were not expecting to"); | |
65efcfce LB |
3833 | } |
3834 | ||
d62a17ae | 3835 | void rfapiProcessUpdate(struct peer *peer, |
3836 | void *rfd, /* set when looped from RFP/RFAPI */ | |
5a1ae2c2 | 3837 | const struct prefix *p, struct prefix_rd *prd, |
d7c0a89a QY |
3838 | struct attr *attr, afi_t afi, safi_t safi, uint8_t type, |
3839 | uint8_t sub_type, uint32_t *label) | |
65efcfce | 3840 | { |
d62a17ae | 3841 | struct bgp *bgp; |
3842 | struct rfapi *h; | |
3843 | struct rfapi_import_table *it; | |
3844 | int has_ip_route = 1; | |
3845 | uint32_t lni = 0; | |
3846 | ||
3847 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
3848 | assert(bgp); | |
3849 | ||
3850 | h = bgp->rfapi; | |
3851 | assert(h); | |
3852 | ||
3853 | /* | |
3854 | * look at high-order byte of RD. FF means MAC | |
3855 | * address is present (VNC L2VPN) | |
3856 | */ | |
3857 | if ((safi == SAFI_MPLS_VPN) | |
3858 | && (decode_rd_type(prd->val) == RD_TYPE_VNC_ETH)) { | |
3859 | struct prefix pfx_mac_buf; | |
3860 | struct prefix pfx_nexthop_buf; | |
3861 | int rc; | |
3862 | ||
3863 | /* | |
3864 | * Set flag if prefix and nexthop are the same - don't | |
3865 | * add the route to normal IP-based import tables | |
3866 | */ | |
3867 | if (!rfapiGetNexthop(attr, &pfx_nexthop_buf)) { | |
3868 | if (!prefix_cmp(&pfx_nexthop_buf, p)) { | |
3869 | has_ip_route = 0; | |
3870 | } | |
3871 | } | |
3872 | ||
3873 | memset(&pfx_mac_buf, 0, sizeof(pfx_mac_buf)); | |
3874 | pfx_mac_buf.family = AF_ETHERNET; | |
3875 | pfx_mac_buf.prefixlen = 48; | |
3876 | memcpy(&pfx_mac_buf.u.prefix_eth.octet, prd->val + 2, 6); | |
3877 | ||
3878 | /* | |
3879 | * Find rt containing LNI (Logical Network ID), which | |
3880 | * _should_ always be present when mac address is present | |
3881 | */ | |
b53e67a3 | 3882 | rc = rfapiEcommunityGetLNI(bgp_attr_get_ecommunity(attr), &lni); |
d62a17ae | 3883 | |
3884 | vnc_zlog_debug_verbose( | |
3885 | "%s: rfapiEcommunityGetLNI returned %d, lni=%d, attr=%p", | |
3886 | __func__, rc, lni, attr); | |
8cea9547 | 3887 | if (!rc) { |
d62a17ae | 3888 | it = rfapiMacImportTableGet(bgp, lni); |
3889 | ||
3890 | rfapiBgpInfoFilteredImportVPN( | |
3891 | it, FIF_ACTION_UPDATE, peer, rfd, | |
3892 | &pfx_mac_buf, /* prefix */ | |
3893 | p, /* aux prefix: IP addr */ | |
3894 | AFI_L2VPN, prd, attr, type, sub_type, label); | |
3895 | } | |
3896 | } | |
3897 | ||
3898 | if (!has_ip_route) | |
3899 | return; | |
3900 | ||
3901 | /* | |
3902 | * Iterate over all import tables; do a filtered import | |
3903 | * for the afi/safi combination | |
3904 | */ | |
3905 | for (it = h->imports; it; it = it->next) { | |
3906 | (*rfapiBgpInfoFilteredImportFunction(safi))( | |
3907 | it, FIF_ACTION_UPDATE, peer, rfd, p, /* prefix */ | |
3908 | NULL, afi, prd, attr, type, sub_type, label); | |
3909 | } | |
3910 | ||
3911 | if (safi == SAFI_MPLS_VPN) { | |
3912 | vnc_direct_bgp_rh_add_route(bgp, afi, p, peer, attr); | |
d62a17ae | 3913 | rfapiBgpInfoFilteredImportVPN( |
3914 | bgp->rfapi->it_ce, FIF_ACTION_UPDATE, peer, rfd, | |
3915 | p, /* prefix */ | |
3916 | NULL, afi, prd, attr, type, sub_type, label); | |
3917 | } | |
65efcfce LB |
3918 | } |
3919 | ||
3920 | ||
5a1ae2c2 | 3921 | void rfapiProcessWithdraw(struct peer *peer, void *rfd, const struct prefix *p, |
d62a17ae | 3922 | struct prefix_rd *prd, struct attr *attr, afi_t afi, |
d7c0a89a | 3923 | safi_t safi, uint8_t type, int kill) |
65efcfce | 3924 | { |
d62a17ae | 3925 | struct bgp *bgp; |
3926 | struct rfapi *h; | |
3927 | struct rfapi_import_table *it; | |
3928 | ||
3929 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
3930 | assert(bgp); | |
3931 | ||
3932 | h = bgp->rfapi; | |
3933 | assert(h); | |
3934 | ||
3935 | /* | |
3936 | * look at high-order byte of RD. FF means MAC | |
3937 | * address is present (VNC L2VPN) | |
3938 | */ | |
3939 | if (h->import_mac != NULL && safi == SAFI_MPLS_VPN | |
3940 | && decode_rd_type(prd->val) == RD_TYPE_VNC_ETH) { | |
3941 | struct prefix pfx_mac_buf; | |
3942 | void *cursor = NULL; | |
3943 | int rc; | |
3944 | ||
3945 | memset(&pfx_mac_buf, 0, sizeof(pfx_mac_buf)); | |
3946 | pfx_mac_buf.family = AF_ETHERNET; | |
3947 | pfx_mac_buf.prefixlen = 48; | |
3948 | memcpy(&pfx_mac_buf.u.prefix_eth, prd->val + 2, 6); | |
3949 | ||
3950 | /* | |
3951 | * withdraw does not contain attrs, so we don't have | |
3952 | * access to the route's LNI, which would ordinarily | |
3953 | * select the specific mac-based import table. Instead, | |
3954 | * we must iterate over all mac-based tables and rely | |
3955 | * on the RD to match. | |
3956 | * | |
3957 | * If this approach is too slow, add an index where | |
3958 | * key is {RD, peer} and value is the import table | |
3959 | */ | |
3960 | for (rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
3961 | &cursor); | |
3962 | rc == 0; rc = skiplist_next(h->import_mac, NULL, | |
3963 | (void **)&it, &cursor)) { | |
65efcfce | 3964 | |
1e20238a | 3965 | #ifdef DEBUG_L2_EXTRA |
d62a17ae | 3966 | vnc_zlog_debug_verbose( |
3967 | "%s: calling rfapiBgpInfoFilteredImportVPN(it=%p, afi=AFI_L2VPN)", | |
3968 | __func__, it); | |
65efcfce LB |
3969 | #endif |
3970 | ||
d62a17ae | 3971 | rfapiBgpInfoFilteredImportVPN( |
3972 | it, | |
3973 | (kill ? FIF_ACTION_KILL : FIF_ACTION_WITHDRAW), | |
3974 | peer, rfd, &pfx_mac_buf, /* prefix */ | |
3975 | p, /* aux_prefix: IP */ | |
3976 | AFI_L2VPN, prd, attr, type, 0, | |
3977 | NULL); /* sub_type & label unused for withdraw | |
9d303b37 | 3978 | */ |
d62a17ae | 3979 | } |
3980 | } | |
3981 | ||
3982 | /* | |
3983 | * XXX For the case where the withdraw involves an L2 | |
3984 | * route with no IP information, we rely on the lack | |
3985 | * of RT-list intersection to filter out the withdraw | |
3986 | * from the IP-based import tables below | |
3987 | */ | |
3988 | ||
3989 | /* | |
3990 | * Iterate over all import tables; do a filtered import | |
3991 | * for the afi/safi combination | |
3992 | */ | |
3993 | ||
3994 | for (it = h->imports; it; it = it->next) { | |
3995 | (*rfapiBgpInfoFilteredImportFunction(safi))( | |
3996 | it, (kill ? FIF_ACTION_KILL : FIF_ACTION_WITHDRAW), | |
3997 | peer, rfd, p, /* prefix */ | |
3998 | NULL, afi, prd, attr, type, 0, | |
3999 | NULL); /* sub_type & label unused for withdraw */ | |
4000 | } | |
4001 | ||
4002 | /* TBD the deletion should happen after the lifetime expires */ | |
4003 | if (safi == SAFI_MPLS_VPN) | |
4004 | vnc_direct_bgp_rh_del_route(bgp, afi, p, peer); | |
4005 | ||
4006 | if (safi == SAFI_MPLS_VPN) { | |
4007 | rfapiBgpInfoFilteredImportVPN( | |
4008 | bgp->rfapi->it_ce, | |
4009 | (kill ? FIF_ACTION_KILL : FIF_ACTION_WITHDRAW), peer, | |
4010 | rfd, p, /* prefix */ | |
4011 | NULL, afi, prd, attr, type, 0, | |
4012 | NULL); /* sub_type & label unused for withdraw */ | |
4013 | } | |
65efcfce LB |
4014 | } |
4015 | ||
4016 | /* | |
4017 | * TBD optimized withdraw timer algorithm for case of many | |
4018 | * routes expiring at the same time due to peer drop. | |
4019 | */ | |
4020 | /* | |
40381db7 | 4021 | * 1. Visit all BPIs in all ENCAP import tables. |
65efcfce | 4022 | * |
40381db7 DS |
4023 | * a. If a bpi's peer is the failed peer, remove the bpi. |
4024 | * b. If the removed ENCAP bpi was first in the list of | |
4025 | * BPIs at this ENCAP node, loop over all monitors | |
65efcfce LB |
4026 | * at this node: |
4027 | * | |
4028 | * (1) for each ENCAP monitor, loop over all its | |
4029 | * VPN node monitors and set their RFAPI_MON_FLAG_NEEDCALLBACK | |
4030 | * flags. | |
4031 | * | |
40381db7 DS |
4032 | * 2. Visit all BPIs in all VPN import tables. |
4033 | * a. If a bpi's peer is the failed peer, remove the bpi. | |
65efcfce LB |
4034 | * b. loop over all the VPN node monitors and set their |
4035 | * RFAPI_MON_FLAG_NEEDCALLBACK flags | |
40381db7 | 4036 | * c. If there are no BPIs left at this VPN node, |
65efcfce LB |
4037 | * |
4038 | */ | |
4039 | ||
4040 | ||
4041 | /* surprise, this gets called from peer_delete(), from rfapi_close() */ | |
d62a17ae | 4042 | static void rfapiProcessPeerDownRt(struct peer *peer, |
4043 | struct rfapi_import_table *import_table, | |
4044 | afi_t afi, safi_t safi) | |
65efcfce | 4045 | { |
fe08ba7e | 4046 | struct agg_node *rn; |
40381db7 | 4047 | struct bgp_path_info *bpi; |
58cf0823 DS |
4048 | struct agg_table *rt = NULL; |
4049 | void (*timer_service_func)(struct thread *) = NULL; | |
d62a17ae | 4050 | |
4051 | assert(afi == AFI_IP || afi == AFI_IP6); | |
4052 | ||
4053 | VNC_ITRCCK; | |
4054 | ||
4055 | switch (safi) { | |
4056 | case SAFI_MPLS_VPN: | |
4057 | rt = import_table->imported_vpn[afi]; | |
4058 | timer_service_func = rfapiWithdrawTimerVPN; | |
4059 | break; | |
4060 | case SAFI_ENCAP: | |
4061 | rt = import_table->imported_encap[afi]; | |
4062 | timer_service_func = rfapiWithdrawTimerEncap; | |
4063 | break; | |
58cf0823 DS |
4064 | case SAFI_UNSPEC: |
4065 | case SAFI_UNICAST: | |
4066 | case SAFI_MULTICAST: | |
4067 | case SAFI_EVPN: | |
4068 | case SAFI_LABELED_UNICAST: | |
4069 | case SAFI_FLOWSPEC: | |
4070 | case SAFI_MAX: | |
21fe4510 QY |
4071 | /* Suppress uninitialized variable warning */ |
4072 | rt = NULL; | |
4073 | timer_service_func = NULL; | |
d62a17ae | 4074 | assert(0); |
4075 | } | |
4076 | ||
fe08ba7e | 4077 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
40381db7 DS |
4078 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
4079 | if (bpi->peer == peer) { | |
d62a17ae | 4080 | |
40381db7 | 4081 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
d62a17ae | 4082 | /* already in holddown, skip */ |
4083 | continue; | |
4084 | } | |
4085 | ||
4086 | if (safi == SAFI_MPLS_VPN) { | |
4087 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 4088 | bpi, import_table, afi, -1); |
d62a17ae | 4089 | import_table->holddown_count[afi] += 1; |
4090 | } | |
40381db7 | 4091 | rfapiBiStartWithdrawTimer(import_table, rn, bpi, |
d62a17ae | 4092 | afi, safi, |
4093 | timer_service_func); | |
4094 | } | |
4095 | } | |
4096 | } | |
4097 | VNC_ITRCCK; | |
65efcfce LB |
4098 | } |
4099 | ||
d62a17ae | 4100 | /* |
65efcfce LB |
4101 | * This gets called when a peer connection drops. We have to remove |
4102 | * all the routes from this peer. | |
4103 | * | |
4104 | * Current approach is crude. TBD Optimize by setting fewer timers and | |
4105 | * grouping withdrawn routes so we can generate callbacks more | |
4106 | * efficiently. | |
4107 | */ | |
d62a17ae | 4108 | void rfapiProcessPeerDown(struct peer *peer) |
65efcfce | 4109 | { |
d62a17ae | 4110 | struct bgp *bgp; |
4111 | struct rfapi *h; | |
4112 | struct rfapi_import_table *it; | |
4113 | ||
4114 | /* | |
4115 | * If this peer is a "dummy" peer structure atached to a RFAPI | |
4116 | * nve_descriptor, we don't need to walk the import tables | |
4117 | * because the routes are already withdrawn by rfapi_close() | |
4118 | */ | |
4119 | if (CHECK_FLAG(peer->flags, PEER_FLAG_IS_RFAPI_HD)) | |
4120 | return; | |
4121 | ||
4122 | /* | |
40381db7 DS |
4123 | * 1. Visit all BPIs in all ENCAP import tables. |
4124 | * Start withdraw timer on the BPIs that match peer. | |
d62a17ae | 4125 | * |
40381db7 DS |
4126 | * 2. Visit All BPIs in all VPN import tables. |
4127 | * Start withdraw timer on the BPIs that match peer. | |
d62a17ae | 4128 | */ |
4129 | ||
4130 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
4131 | if (!bgp) | |
4132 | return; | |
4133 | ||
4134 | h = bgp->rfapi; | |
4135 | assert(h); | |
4136 | ||
4137 | for (it = h->imports; it; it = it->next) { | |
4138 | rfapiProcessPeerDownRt(peer, it, AFI_IP, SAFI_ENCAP); | |
4139 | rfapiProcessPeerDownRt(peer, it, AFI_IP6, SAFI_ENCAP); | |
4140 | rfapiProcessPeerDownRt(peer, it, AFI_IP, SAFI_MPLS_VPN); | |
4141 | rfapiProcessPeerDownRt(peer, it, AFI_IP6, SAFI_MPLS_VPN); | |
4142 | } | |
4143 | ||
4144 | if (h->it_ce) { | |
4145 | rfapiProcessPeerDownRt(peer, h->it_ce, AFI_IP, SAFI_MPLS_VPN); | |
4146 | rfapiProcessPeerDownRt(peer, h->it_ce, AFI_IP6, SAFI_MPLS_VPN); | |
4147 | } | |
65efcfce LB |
4148 | } |
4149 | ||
4150 | /* | |
4151 | * Import an entire RIB (for an afi/safi) to an import table RIB, | |
4152 | * filtered according to the import table's RT list | |
4153 | * | |
4154 | * TBD: does this function need additions to match rfapiProcessUpdate() | |
d62a17ae | 4155 | * for, e.g., L2 handling? |
65efcfce | 4156 | */ |
d62a17ae | 4157 | static void rfapiBgpTableFilteredImport(struct bgp *bgp, |
4158 | struct rfapi_import_table *it, | |
4159 | afi_t afi, safi_t safi) | |
65efcfce | 4160 | { |
9bcb3eef DS |
4161 | struct bgp_dest *dest1; |
4162 | struct bgp_dest *dest2; | |
d62a17ae | 4163 | |
4164 | /* Only these SAFIs have 2-level RIBS */ | |
4165 | assert(safi == SAFI_MPLS_VPN || safi == SAFI_ENCAP); | |
4166 | ||
4167 | /* | |
4168 | * Now visit all the rd nodes and the nodes of all the | |
4169 | * route tables attached to them, and import the routes | |
4170 | * if they have matching route targets | |
4171 | */ | |
9bcb3eef DS |
4172 | for (dest1 = bgp_table_top(bgp->rib[afi][safi]); dest1; |
4173 | dest1 = bgp_route_next(dest1)) { | |
d62a17ae | 4174 | |
9bcb3eef | 4175 | if (bgp_dest_has_bgp_path_info_data(dest1)) { |
6f94b685 | 4176 | |
9bcb3eef DS |
4177 | for (dest2 = bgp_table_top( |
4178 | bgp_dest_get_bgp_table_info(dest1)); | |
4179 | dest2; dest2 = bgp_route_next(dest2)) { | |
d62a17ae | 4180 | |
40381db7 | 4181 | struct bgp_path_info *bpi; |
d62a17ae | 4182 | |
9bcb3eef | 4183 | for (bpi = bgp_dest_get_bgp_path_info(dest2); |
6f94b685 | 4184 | bpi; bpi = bpi->next) { |
d7c0a89a | 4185 | uint32_t label = 0; |
d62a17ae | 4186 | |
40381db7 | 4187 | if (CHECK_FLAG(bpi->flags, |
1defdda8 | 4188 | BGP_PATH_REMOVED)) |
d62a17ae | 4189 | continue; |
4190 | ||
40381db7 | 4191 | if (bpi->extra) |
d62a17ae | 4192 | label = decode_label( |
40381db7 | 4193 | &bpi->extra->label[0]); |
d62a17ae | 4194 | (*rfapiBgpInfoFilteredImportFunction( |
4195 | safi))( | |
4196 | it, /* which import table */ | |
40381db7 | 4197 | FIF_ACTION_UPDATE, bpi->peer, |
9bcb3eef DS |
4198 | NULL, |
4199 | bgp_dest_get_prefix(dest2), | |
d62a17ae | 4200 | NULL, afi, |
b54892e0 | 4201 | (struct prefix_rd *) |
9bcb3eef DS |
4202 | bgp_dest_get_prefix( |
4203 | dest1), | |
40381db7 DS |
4204 | bpi->attr, bpi->type, |
4205 | bpi->sub_type, &label); | |
d62a17ae | 4206 | } |
4207 | } | |
4208 | } | |
4209 | } | |
65efcfce LB |
4210 | } |
4211 | ||
4212 | ||
4213 | /* per-bgp-instance rfapi data */ | |
d62a17ae | 4214 | struct rfapi *bgp_rfapi_new(struct bgp *bgp) |
65efcfce | 4215 | { |
d62a17ae | 4216 | struct rfapi *h; |
e7038dde | 4217 | afi_t afi; |
d62a17ae | 4218 | struct rfapi_rfp_cfg *cfg = NULL; |
4219 | struct rfapi_rfp_cb_methods *cbm = NULL; | |
4220 | ||
4221 | assert(bgp->rfapi_cfg == NULL); | |
4222 | ||
9f5dc319 | 4223 | h = XCALLOC(MTYPE_RFAPI, sizeof(struct rfapi)); |
d62a17ae | 4224 | |
4225 | for (afi = AFI_IP; afi < AFI_MAX; afi++) { | |
fe08ba7e | 4226 | h->un[afi] = agg_table_init(); |
d62a17ae | 4227 | } |
4228 | ||
4229 | /* | |
4230 | * initialize the ce import table | |
4231 | */ | |
4232 | h->it_ce = XCALLOC(MTYPE_RFAPI_IMPORTTABLE, | |
4233 | sizeof(struct rfapi_import_table)); | |
fe08ba7e DS |
4234 | h->it_ce->imported_vpn[AFI_IP] = agg_table_init(); |
4235 | h->it_ce->imported_vpn[AFI_IP6] = agg_table_init(); | |
4236 | h->it_ce->imported_encap[AFI_IP] = agg_table_init(); | |
4237 | h->it_ce->imported_encap[AFI_IP6] = agg_table_init(); | |
d62a17ae | 4238 | rfapiBgpTableFilteredImport(bgp, h->it_ce, AFI_IP, SAFI_MPLS_VPN); |
4239 | rfapiBgpTableFilteredImport(bgp, h->it_ce, AFI_IP6, SAFI_MPLS_VPN); | |
4240 | ||
4241 | /* | |
4242 | * Set up work queue for deferred rfapi_close operations | |
4243 | */ | |
4244 | h->deferred_close_q = | |
4245 | work_queue_new(bm->master, "rfapi deferred close"); | |
4246 | h->deferred_close_q->spec.workfunc = rfapi_deferred_close_workfunc; | |
4247 | h->deferred_close_q->spec.data = h; | |
4248 | ||
4249 | h->rfp = rfp_start(bm->master, &cfg, &cbm); | |
4250 | bgp->rfapi_cfg = bgp_rfapi_cfg_new(cfg); | |
4251 | if (cbm != NULL) { | |
4252 | h->rfp_methods = *cbm; | |
4253 | } | |
4254 | return h; | |
65efcfce LB |
4255 | } |
4256 | ||
d62a17ae | 4257 | void bgp_rfapi_destroy(struct bgp *bgp, struct rfapi *h) |
65efcfce | 4258 | { |
e7038dde | 4259 | afi_t afi; |
0ae6124f | 4260 | |
d62a17ae | 4261 | if (bgp == NULL || h == NULL) |
4262 | return; | |
4263 | ||
4264 | if (h->resolve_nve_nexthop) { | |
4265 | skiplist_free(h->resolve_nve_nexthop); | |
4266 | h->resolve_nve_nexthop = NULL; | |
4267 | } | |
4268 | ||
fe08ba7e DS |
4269 | agg_table_finish(h->it_ce->imported_vpn[AFI_IP]); |
4270 | agg_table_finish(h->it_ce->imported_vpn[AFI_IP6]); | |
4271 | agg_table_finish(h->it_ce->imported_encap[AFI_IP]); | |
4272 | agg_table_finish(h->it_ce->imported_encap[AFI_IP6]); | |
d62a17ae | 4273 | |
4274 | if (h->import_mac) { | |
4275 | struct rfapi_import_table *it; | |
4276 | void *cursor; | |
4277 | int rc; | |
4278 | ||
9d303b37 DL |
4279 | for (cursor = NULL, |
4280 | rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4281 | &cursor); | |
d62a17ae | 4282 | !rc; rc = skiplist_next(h->import_mac, NULL, (void **)&it, |
4283 | &cursor)) { | |
4284 | ||
4285 | rfapiImportTableFlush(it); | |
4286 | XFREE(MTYPE_RFAPI_IMPORTTABLE, it); | |
4287 | } | |
4288 | skiplist_free(h->import_mac); | |
4289 | h->import_mac = NULL; | |
4290 | } | |
4291 | ||
e208c8f9 | 4292 | work_queue_free_and_null(&h->deferred_close_q); |
d62a17ae | 4293 | |
4294 | if (h->rfp != NULL) | |
4295 | rfp_stop(h->rfp); | |
0ae6124f LB |
4296 | |
4297 | for (afi = AFI_IP; afi < AFI_MAX; afi++) { | |
fe08ba7e | 4298 | agg_table_finish(h->un[afi]); |
0ae6124f LB |
4299 | } |
4300 | ||
d62a17ae | 4301 | XFREE(MTYPE_RFAPI_IMPORTTABLE, h->it_ce); |
4302 | XFREE(MTYPE_RFAPI, h); | |
65efcfce LB |
4303 | } |
4304 | ||
4305 | struct rfapi_import_table * | |
d62a17ae | 4306 | rfapiImportTableRefAdd(struct bgp *bgp, struct ecommunity *rt_import_list, |
4307 | struct rfapi_nve_group_cfg *rfg) | |
65efcfce | 4308 | { |
d62a17ae | 4309 | struct rfapi *h; |
4310 | struct rfapi_import_table *it; | |
4311 | afi_t afi; | |
4312 | ||
4313 | h = bgp->rfapi; | |
4314 | assert(h); | |
4315 | ||
4316 | for (it = h->imports; it; it = it->next) { | |
4317 | if (ecommunity_cmp(it->rt_import_list, rt_import_list)) | |
4318 | break; | |
4319 | } | |
4320 | ||
4321 | vnc_zlog_debug_verbose("%s: matched it=%p", __func__, it); | |
4322 | ||
4323 | if (!it) { | |
4324 | it = XCALLOC(MTYPE_RFAPI_IMPORTTABLE, | |
4325 | sizeof(struct rfapi_import_table)); | |
d62a17ae | 4326 | it->next = h->imports; |
4327 | h->imports = it; | |
4328 | ||
4329 | it->rt_import_list = ecommunity_dup(rt_import_list); | |
4330 | it->rfg = rfg; | |
4331 | it->monitor_exterior_orphans = | |
63265b5c | 4332 | skiplist_new(0, NULL, prefix_free_lists); |
d62a17ae | 4333 | |
4334 | /* | |
4335 | * fill import route tables from RIBs | |
4336 | * | |
4337 | * Potential area for optimization. If this occurs when | |
4338 | * tables are large (e.g., the operator adds a nve group | |
4339 | * with a new RT list to a running system), it could take | |
4340 | * a while. | |
4341 | * | |
4342 | */ | |
4343 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
4344 | ||
fe08ba7e DS |
4345 | it->imported_vpn[afi] = agg_table_init(); |
4346 | it->imported_encap[afi] = agg_table_init(); | |
d62a17ae | 4347 | |
4348 | rfapiBgpTableFilteredImport(bgp, it, afi, | |
4349 | SAFI_MPLS_VPN); | |
4350 | rfapiBgpTableFilteredImport(bgp, it, afi, SAFI_ENCAP); | |
4351 | ||
4352 | vnc_import_bgp_exterior_redist_enable_it(bgp, afi, it); | |
4353 | } | |
4354 | } | |
4355 | ||
4356 | it->refcount += 1; | |
4357 | ||
4358 | return it; | |
65efcfce LB |
4359 | } |
4360 | ||
4361 | /* | |
4362 | * skiplist element free function | |
4363 | */ | |
d62a17ae | 4364 | static void delete_rem_pfx_na_free(void *na) |
65efcfce | 4365 | { |
d62a17ae | 4366 | uint32_t *pCounter = ((struct rfapi_nve_addr *)na)->info; |
65efcfce | 4367 | |
d62a17ae | 4368 | *pCounter += 1; |
4369 | XFREE(MTYPE_RFAPI_NVE_ADDR, na); | |
65efcfce LB |
4370 | } |
4371 | ||
4372 | /* | |
4373 | * Common deleter for IP and MAC import tables | |
4374 | */ | |
d62a17ae | 4375 | static void rfapiDeleteRemotePrefixesIt( |
4376 | struct bgp *bgp, struct rfapi_import_table *it, struct prefix *un, | |
4377 | struct prefix *vn, struct prefix *p, int delete_active, | |
4378 | int delete_holddown, uint32_t *pARcount, uint32_t *pAHcount, | |
4379 | uint32_t *pHRcount, uint32_t *pHHcount, | |
4380 | struct skiplist *uniq_active_nves, struct skiplist *uniq_holddown_nves) | |
65efcfce | 4381 | { |
d62a17ae | 4382 | afi_t afi; |
65efcfce | 4383 | |
1e20238a | 4384 | #ifdef DEBUG_L2_EXTRA |
d62a17ae | 4385 | { |
872ed4c7 | 4386 | char buf_pfx[PREFIX_STRLEN]; |
d62a17ae | 4387 | |
4388 | if (p) { | |
872ed4c7 | 4389 | prefix2str(p, buf_pfx, sizeof(buf_pfx)); |
d62a17ae | 4390 | } else { |
4391 | buf_pfx[0] = '*'; | |
4392 | buf_pfx[1] = 0; | |
4393 | } | |
4394 | ||
4395 | vnc_zlog_debug_verbose( | |
4396 | "%s: entry, p=%s, delete_active=%d, delete_holddown=%d", | |
4397 | __func__, buf_pfx, delete_active, delete_holddown); | |
4398 | } | |
65efcfce LB |
4399 | #endif |
4400 | ||
d62a17ae | 4401 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { |
4402 | ||
fe08ba7e DS |
4403 | struct agg_table *rt; |
4404 | struct agg_node *rn; | |
d62a17ae | 4405 | |
4406 | if (p && (family2afi(p->family) != afi)) { | |
4407 | continue; | |
4408 | } | |
4409 | ||
4410 | rt = it->imported_vpn[afi]; | |
4411 | if (!rt) | |
4412 | continue; | |
4413 | ||
4414 | vnc_zlog_debug_verbose("%s: scanning rt for afi=%d", __func__, | |
4415 | afi); | |
4416 | ||
fe08ba7e | 4417 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
40381db7 | 4418 | struct bgp_path_info *bpi; |
4b7e6066 | 4419 | struct bgp_path_info *next; |
26a3ffd6 | 4420 | const struct prefix *rn_p = agg_node_get_prefix(rn); |
d62a17ae | 4421 | |
2dbe669b DA |
4422 | if (p && VNC_DEBUG(IMPORT_DEL_REMOTE)) |
4423 | vnc_zlog_debug_any("%s: want %pFX, have %pRN", | |
4424 | __func__, p, rn); | |
d62a17ae | 4425 | |
26a3ffd6 | 4426 | if (p && prefix_cmp(p, rn_p)) |
d62a17ae | 4427 | continue; |
4428 | ||
26a3ffd6 | 4429 | vnc_zlog_debug_verbose("%s: rn pfx=%pRN", __func__, rn); |
d62a17ae | 4430 | |
4431 | /* TBD is this valid for afi == AFI_L2VPN? */ | |
4432 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, 1); | |
4433 | ||
40381db7 DS |
4434 | for (bpi = rn->info; bpi; bpi = next) { |
4435 | next = bpi->next; | |
d62a17ae | 4436 | |
4437 | struct prefix qpt; | |
4438 | struct prefix qct; | |
4439 | int qpt_valid = 0; | |
4440 | int qct_valid = 0; | |
4441 | int is_active = 0; | |
4442 | ||
40381db7 DS |
4443 | vnc_zlog_debug_verbose("%s: examining bpi %p", |
4444 | __func__, bpi); | |
d62a17ae | 4445 | |
05864da7 DS |
4446 | if (!rfapiGetNexthop(bpi->attr, &qpt)) |
4447 | qpt_valid = 1; | |
4448 | ||
d62a17ae | 4449 | if (vn) { |
4450 | if (!qpt_valid | |
4451 | || !prefix_match(vn, &qpt)) { | |
1e20238a | 4452 | #ifdef DEBUG_L2_EXTRA |
d62a17ae | 4453 | vnc_zlog_debug_verbose( |
4454 | "%s: continue at vn && !qpt_valid || !prefix_match(vn, &qpt)", | |
4455 | __func__); | |
65efcfce | 4456 | #endif |
d62a17ae | 4457 | continue; |
4458 | } | |
4459 | } | |
65efcfce | 4460 | |
40381db7 | 4461 | if (!rfapiGetUnAddrOfVpnBi(bpi, &qct)) |
d62a17ae | 4462 | qct_valid = 1; |
65efcfce | 4463 | |
d62a17ae | 4464 | if (un) { |
4465 | if (!qct_valid | |
4466 | || !prefix_match(un, &qct)) { | |
1e20238a | 4467 | #ifdef DEBUG_L2_EXTRA |
d62a17ae | 4468 | vnc_zlog_debug_verbose( |
4469 | "%s: continue at un && !qct_valid || !prefix_match(un, &qct)", | |
4470 | __func__); | |
65efcfce | 4471 | #endif |
d62a17ae | 4472 | continue; |
4473 | } | |
4474 | } | |
4475 | ||
4476 | ||
4477 | /* | |
40381db7 | 4478 | * Blow bpi away |
d62a17ae | 4479 | */ |
4480 | /* | |
4481 | * If this route is waiting to be deleted | |
4482 | * because of | |
4483 | * a previous withdraw, we must cancel its | |
4484 | * timer. | |
4485 | */ | |
40381db7 | 4486 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
d62a17ae | 4487 | if (!delete_holddown) |
4488 | continue; | |
40381db7 | 4489 | if (bpi->extra->vnc.import.timer) { |
d62a17ae | 4490 | struct rfapi_withdraw *wcb = |
c3aaa89a DS |
4491 | THREAD_ARG( |
4492 | bpi->extra->vnc | |
4493 | .import | |
4494 | .timer); | |
d62a17ae | 4495 | |
4496 | wcb->import_table | |
4497 | ->holddown_count[afi] -= | |
4498 | 1; | |
4499 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 4500 | bpi, wcb->import_table, |
d62a17ae | 4501 | afi, 1); |
4502 | XFREE(MTYPE_RFAPI_WITHDRAW, | |
4503 | wcb); | |
c3aaa89a DS |
4504 | THREAD_OFF( |
4505 | bpi->extra->vnc.import | |
4506 | .timer); | |
d62a17ae | 4507 | } |
4508 | } else { | |
4509 | if (!delete_active) | |
4510 | continue; | |
4511 | is_active = 1; | |
4512 | } | |
4513 | ||
4514 | vnc_zlog_debug_verbose( | |
40381db7 DS |
4515 | "%s: deleting bpi %p (qct_valid=%d, qpt_valid=%d, delete_holddown=%d, delete_active=%d)", |
4516 | __func__, bpi, qct_valid, qpt_valid, | |
d62a17ae | 4517 | delete_holddown, delete_active); |
4518 | ||
4519 | ||
4520 | /* | |
4521 | * add nve to list | |
4522 | */ | |
4523 | if (qct_valid && qpt_valid) { | |
4524 | ||
4525 | struct rfapi_nve_addr na; | |
4526 | struct rfapi_nve_addr *nap; | |
4527 | ||
4528 | memset(&na, 0, sizeof(na)); | |
4529 | assert(!rfapiQprefix2Raddr(&qct, | |
4530 | &na.un)); | |
4531 | assert(!rfapiQprefix2Raddr(&qpt, | |
4532 | &na.vn)); | |
4533 | ||
4534 | if (skiplist_search( | |
4535 | (is_active | |
4536 | ? uniq_active_nves | |
4537 | : uniq_holddown_nves), | |
4538 | &na, (void **)&nap)) { | |
4539 | char line[BUFSIZ]; | |
4540 | ||
4541 | nap = XCALLOC( | |
4542 | MTYPE_RFAPI_NVE_ADDR, | |
4543 | sizeof(struct | |
4544 | rfapi_nve_addr)); | |
d62a17ae | 4545 | *nap = na; |
4546 | nap->info = is_active | |
4547 | ? pAHcount | |
4548 | : pHHcount; | |
4549 | skiplist_insert( | |
4550 | (is_active | |
4551 | ? uniq_active_nves | |
4552 | : uniq_holddown_nves), | |
4553 | nap, nap); | |
4554 | ||
4555 | rfapiNveAddr2Str(nap, line, | |
4556 | BUFSIZ); | |
4557 | } | |
4558 | } | |
4559 | ||
26a3ffd6 | 4560 | vnc_direct_bgp_rh_del_route(bgp, afi, rn_p, |
40381db7 | 4561 | bpi->peer); |
d62a17ae | 4562 | |
40381db7 | 4563 | RFAPI_UPDATE_ITABLE_COUNT(bpi, it, afi, -1); |
d62a17ae | 4564 | it->holddown_count[afi] += 1; |
40381db7 | 4565 | rfapiExpireVpnNow(it, rn, bpi, 1); |
d62a17ae | 4566 | |
4567 | vnc_zlog_debug_verbose( | |
4568 | "%s: incrementing count (is_active=%d)", | |
4569 | __func__, is_active); | |
4570 | ||
4571 | if (is_active) | |
4572 | ++*pARcount; | |
4573 | else | |
4574 | ++*pHRcount; | |
4575 | } | |
4576 | } | |
4577 | } | |
65efcfce LB |
4578 | } |
4579 | ||
4580 | ||
4581 | /* | |
4582 | * For use by the "clear vnc prefixes" command | |
4583 | */ | |
4584 | /*------------------------------------------ | |
4585 | * rfapiDeleteRemotePrefixes | |
4586 | * | |
4587 | * UI helper: For use by the "clear vnc prefixes" command | |
4588 | * | |
d62a17ae | 4589 | * input: |
65efcfce LB |
4590 | * un if set, tunnel must match this prefix |
4591 | * vn if set, nexthop prefix must match this prefix | |
4592 | * p if set, prefix must match this prefix | |
5ff06872 | 4593 | * it if set, only look in this import table |
65efcfce LB |
4594 | * |
4595 | * output | |
4596 | * pARcount number of active routes deleted | |
4597 | * pAHcount number of active nves deleted | |
4598 | * pHRcount number of holddown routes deleted | |
4599 | * pHHcount number of holddown nves deleted | |
4600 | * | |
4601 | * return value: | |
4602 | * void | |
4603 | --------------------------------------------*/ | |
d62a17ae | 4604 | void rfapiDeleteRemotePrefixes(struct prefix *un, struct prefix *vn, |
4605 | struct prefix *p, | |
4606 | struct rfapi_import_table *arg_it, | |
4607 | int delete_active, int delete_holddown, | |
4608 | uint32_t *pARcount, uint32_t *pAHcount, | |
4609 | uint32_t *pHRcount, uint32_t *pHHcount) | |
65efcfce | 4610 | { |
d62a17ae | 4611 | struct bgp *bgp; |
4612 | struct rfapi *h; | |
4613 | struct rfapi_import_table *it; | |
4614 | uint32_t deleted_holddown_route_count = 0; | |
4615 | uint32_t deleted_active_route_count = 0; | |
4616 | uint32_t deleted_holddown_nve_count = 0; | |
4617 | uint32_t deleted_active_nve_count = 0; | |
4618 | struct skiplist *uniq_holddown_nves; | |
4619 | struct skiplist *uniq_active_nves; | |
4620 | ||
4621 | VNC_ITRCCK; | |
4622 | ||
4623 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
4624 | /* If no bgp instantiated yet, no vnc prefixes exist */ | |
4625 | if (!bgp) | |
4626 | return; | |
4627 | ||
4628 | h = bgp->rfapi; | |
4629 | assert(h); | |
4630 | ||
4631 | uniq_holddown_nves = | |
4632 | skiplist_new(0, rfapi_nve_addr_cmp, delete_rem_pfx_na_free); | |
4633 | uniq_active_nves = | |
4634 | skiplist_new(0, rfapi_nve_addr_cmp, delete_rem_pfx_na_free); | |
4635 | ||
4636 | /* | |
4637 | * Iterate over all import tables; do a filtered import | |
4638 | * for the afi/safi combination | |
4639 | */ | |
4640 | ||
4641 | if (arg_it) | |
4642 | it = arg_it; | |
4643 | else | |
4644 | it = h->imports; | |
4645 | for (; it;) { | |
4646 | ||
4647 | vnc_zlog_debug_verbose( | |
4648 | "%s: calling rfapiDeleteRemotePrefixesIt() on (IP) import %p", | |
4649 | __func__, it); | |
4650 | ||
4651 | rfapiDeleteRemotePrefixesIt( | |
4652 | bgp, it, un, vn, p, delete_active, delete_holddown, | |
4653 | &deleted_active_route_count, &deleted_active_nve_count, | |
4654 | &deleted_holddown_route_count, | |
4655 | &deleted_holddown_nve_count, uniq_active_nves, | |
4656 | uniq_holddown_nves); | |
4657 | ||
4658 | if (arg_it) | |
4659 | it = NULL; | |
4660 | else | |
4661 | it = it->next; | |
4662 | } | |
4663 | ||
4664 | /* | |
4665 | * Now iterate over L2 import tables | |
4666 | */ | |
4667 | if (h->import_mac && !(p && (p->family != AF_ETHERNET))) { | |
4668 | ||
4669 | void *cursor = NULL; | |
4670 | int rc; | |
4671 | ||
9d303b37 DL |
4672 | for (cursor = NULL, |
4673 | rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4674 | &cursor); | |
d62a17ae | 4675 | !rc; rc = skiplist_next(h->import_mac, NULL, (void **)&it, |
4676 | &cursor)) { | |
4677 | ||
4678 | vnc_zlog_debug_verbose( | |
4679 | "%s: calling rfapiDeleteRemotePrefixesIt() on import_mac %p", | |
4680 | __func__, it); | |
4681 | ||
4682 | rfapiDeleteRemotePrefixesIt( | |
4683 | bgp, it, un, vn, p, delete_active, | |
4684 | delete_holddown, &deleted_active_route_count, | |
4685 | &deleted_active_nve_count, | |
4686 | &deleted_holddown_route_count, | |
4687 | &deleted_holddown_nve_count, uniq_active_nves, | |
4688 | uniq_holddown_nves); | |
4689 | } | |
4690 | } | |
4691 | ||
4692 | /* | |
4693 | * our custom element freeing function above counts as it deletes | |
4694 | */ | |
4695 | skiplist_free(uniq_holddown_nves); | |
4696 | skiplist_free(uniq_active_nves); | |
4697 | ||
4698 | if (pARcount) | |
4699 | *pARcount = deleted_active_route_count; | |
4700 | if (pAHcount) | |
4701 | *pAHcount = deleted_active_nve_count; | |
4702 | if (pHRcount) | |
4703 | *pHRcount = deleted_holddown_route_count; | |
4704 | if (pHHcount) | |
4705 | *pHHcount = deleted_holddown_nve_count; | |
4706 | ||
4707 | VNC_ITRCCK; | |
65efcfce LB |
4708 | } |
4709 | ||
4710 | /*------------------------------------------ | |
4711 | * rfapiCountRemoteRoutes | |
4712 | * | |
4713 | * UI helper: count VRF routes from BGP side | |
4714 | * | |
d62a17ae | 4715 | * input: |
65efcfce LB |
4716 | * |
4717 | * output | |
4718 | * pALRcount count of active local routes | |
4719 | * pARRcount count of active remote routes | |
4720 | * pHRcount count of holddown routes | |
4721 | * pIRcount count of direct imported routes | |
4722 | * | |
4723 | * return value: | |
4724 | * void | |
4725 | --------------------------------------------*/ | |
d62a17ae | 4726 | void rfapiCountAllItRoutes(int *pALRcount, /* active local routes */ |
4727 | int *pARRcount, /* active remote routes */ | |
4728 | int *pHRcount, /* holddown routes */ | |
4729 | int *pIRcount) /* imported routes */ | |
65efcfce | 4730 | { |
d62a17ae | 4731 | struct bgp *bgp; |
4732 | struct rfapi *h; | |
4733 | struct rfapi_import_table *it; | |
4734 | afi_t afi; | |
4735 | ||
4736 | int total_active_local = 0; | |
4737 | int total_active_remote = 0; | |
4738 | int total_holddown = 0; | |
4739 | int total_imported = 0; | |
4740 | ||
4741 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
4742 | assert(bgp); | |
4743 | ||
4744 | h = bgp->rfapi; | |
4745 | assert(h); | |
4746 | ||
4747 | /* | |
4748 | * Iterate over all import tables; do a filtered import | |
4749 | * for the afi/safi combination | |
4750 | */ | |
4751 | ||
4752 | for (it = h->imports; it; it = it->next) { | |
4753 | ||
4754 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
4755 | ||
4756 | total_active_local += it->local_count[afi]; | |
4757 | total_active_remote += it->remote_count[afi]; | |
4758 | total_holddown += it->holddown_count[afi]; | |
4759 | total_imported += it->imported_count[afi]; | |
4760 | } | |
4761 | } | |
4762 | ||
4763 | void *cursor; | |
4764 | int rc; | |
4765 | ||
4766 | if (h->import_mac) { | |
9d303b37 DL |
4767 | for (cursor = NULL, |
4768 | rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4769 | &cursor); | |
d62a17ae | 4770 | !rc; rc = skiplist_next(h->import_mac, NULL, (void **)&it, |
4771 | &cursor)) { | |
4772 | ||
4773 | total_active_local += it->local_count[AFI_L2VPN]; | |
4774 | total_active_remote += it->remote_count[AFI_L2VPN]; | |
4775 | total_holddown += it->holddown_count[AFI_L2VPN]; | |
4776 | total_imported += it->imported_count[AFI_L2VPN]; | |
4777 | } | |
4778 | } | |
4779 | ||
4780 | ||
4781 | if (pALRcount) { | |
4782 | *pALRcount = total_active_local; | |
4783 | } | |
4784 | if (pARRcount) { | |
4785 | *pARRcount = total_active_remote; | |
4786 | } | |
4787 | if (pHRcount) { | |
4788 | *pHRcount = total_holddown; | |
4789 | } | |
4790 | if (pIRcount) { | |
4791 | *pIRcount = total_imported; | |
4792 | } | |
65efcfce LB |
4793 | } |
4794 | ||
4795 | /*------------------------------------------ | |
4796 | * rfapiGetHolddownFromLifetime | |
4797 | * | |
4798 | * calculate holddown value based on lifetime | |
4799 | * | |
d62a17ae | 4800 | * input: |
65efcfce LB |
4801 | * lifetime lifetime |
4802 | * | |
4803 | * return value: | |
4804 | * Holddown value based on lifetime, holddown_factor, | |
4805 | * and RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY | |
4806 | * | |
4807 | --------------------------------------------*/ | |
4808 | /* hold down time maxes out at RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY */ | |
d62a17ae | 4809 | uint32_t rfapiGetHolddownFromLifetime(uint32_t lifetime) |
65efcfce | 4810 | { |
d62a17ae | 4811 | uint32_t factor; |
4812 | struct bgp *bgp; | |
4813 | ||
4814 | bgp = bgp_get_default(); | |
4815 | if (bgp && bgp->rfapi_cfg) | |
4816 | factor = bgp->rfapi_cfg->rfp_cfg.holddown_factor; | |
4817 | else | |
4818 | factor = RFAPI_RFP_CFG_DEFAULT_HOLDDOWN_FACTOR; | |
4819 | ||
4820 | if (factor < 100 || lifetime < RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY) | |
4821 | lifetime = lifetime * factor / 100; | |
4822 | if (lifetime < RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY) | |
4823 | return lifetime; | |
4824 | else | |
4825 | return RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY; | |
65efcfce | 4826 | } |