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47a3a827 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
d62a17ae | 2 | /* |
47a3a827 DL |
3 | * Copyright 2009-2016, LabN Consulting, L.L.C. |
4 | */ | |
65efcfce LB |
5 | |
6 | /* | |
7 | * File: rfapi_import.c | |
8 | * Purpose: Handle import of routes from BGP to RFAPI | |
9 | */ | |
10 | ||
f8b6f499 LB |
11 | #include "lib/zebra.h" |
12 | #include "lib/prefix.h" | |
fe08ba7e | 13 | #include "lib/agg_table.h" |
f8b6f499 LB |
14 | #include "lib/vty.h" |
15 | #include "lib/memory.h" | |
16 | #include "lib/log.h" | |
17 | #include "lib/skiplist.h" | |
24a58196 | 18 | #include "frrevent.h" |
937652c6 | 19 | #include "lib/stream.h" |
02705213 | 20 | #include "lib/lib_errors.h" |
65efcfce | 21 | |
f8b6f499 LB |
22 | #include "bgpd/bgpd.h" |
23 | #include "bgpd/bgp_ecommunity.h" | |
24 | #include "bgpd/bgp_attr.h" | |
25 | #include "bgpd/bgp_route.h" | |
d62a17ae | 26 | #include "bgpd/bgp_mplsvpn.h" /* prefix_rd2str() */ |
f8b6f499 | 27 | #include "bgpd/bgp_vnc_types.h" |
06b9f471 | 28 | #include "bgpd/bgp_rd.h" |
65efcfce | 29 | |
f8b6f499 LB |
30 | #include "bgpd/rfapi/rfapi.h" |
31 | #include "bgpd/rfapi/bgp_rfapi_cfg.h" | |
32 | #include "bgpd/rfapi/rfapi_backend.h" | |
33 | #include "bgpd/rfapi/rfapi_import.h" | |
34 | #include "bgpd/rfapi/rfapi_private.h" | |
35 | #include "bgpd/rfapi/rfapi_monitor.h" | |
36 | #include "bgpd/rfapi/rfapi_nve_addr.h" | |
37 | #include "bgpd/rfapi/rfapi_vty.h" | |
38 | #include "bgpd/rfapi/vnc_export_bgp.h" | |
39 | #include "bgpd/rfapi/vnc_export_bgp_p.h" | |
40 | #include "bgpd/rfapi/vnc_zebra.h" | |
41 | #include "bgpd/rfapi/vnc_import_bgp.h" | |
42 | #include "bgpd/rfapi/vnc_import_bgp_p.h" | |
43 | #include "bgpd/rfapi/rfapi_rib.h" | |
44 | #include "bgpd/rfapi/rfapi_encap_tlv.h" | |
45 | #include "bgpd/rfapi/vnc_debug.h" | |
65efcfce LB |
46 | |
47 | #ifdef HAVE_GLIBC_BACKTRACE | |
48 | /* for backtrace and friends */ | |
49 | #include <execinfo.h> | |
50 | #endif /* HAVE_GLIBC_BACKTRACE */ | |
51 | ||
52 | #undef DEBUG_MONITOR_MOVE_SHORTER | |
53 | #undef DEBUG_RETURNED_NHL | |
54 | #undef DEBUG_ROUTE_COUNTERS | |
55 | #undef DEBUG_ENCAP_MONITOR | |
56 | #undef DEBUG_L2_EXTRA | |
57 | #undef DEBUG_IT_NODES | |
58 | #undef DEBUG_BI_SEARCH | |
59 | ||
60 | /* | |
61 | * Allocated for each withdraw timer instance; freed when the timer | |
62 | * expires or is canceled | |
63 | */ | |
d62a17ae | 64 | struct rfapi_withdraw { |
65 | struct rfapi_import_table *import_table; | |
fe08ba7e | 66 | struct agg_node *node; |
4b7e6066 | 67 | struct bgp_path_info *info; |
d62a17ae | 68 | safi_t safi; /* used only for bulk operations */ |
69 | /* | |
70 | * For import table node reference count checking (i.e., debugging). | |
71 | * Normally when a timer expires, lockoffset should be 0. However, if | |
72 | * the timer expiration function is called directly (e.g., | |
73 | * rfapiExpireVpnNow), the node could be locked by a preceding | |
fe08ba7e DS |
74 | * agg_route_top() or agg_route_next() in a loop, so we need to pass |
75 | * this value in. | |
d62a17ae | 76 | */ |
77 | int lockoffset; | |
65efcfce LB |
78 | }; |
79 | ||
d62a17ae | 80 | /* |
65efcfce LB |
81 | * DEBUG FUNCTION |
82 | * It's evil and fiendish. It's compiler-dependent. | |
83 | * ? Might need LDFLAGS -rdynamic to produce all function names | |
84 | */ | |
d62a17ae | 85 | void rfapiDebugBacktrace(void) |
65efcfce LB |
86 | { |
87 | #ifdef HAVE_GLIBC_BACKTRACE | |
88 | #define RFAPI_DEBUG_BACKTRACE_NENTRIES 200 | |
d62a17ae | 89 | void *buf[RFAPI_DEBUG_BACKTRACE_NENTRIES]; |
90 | char **syms; | |
91 | size_t i; | |
92 | size_t size; | |
65efcfce | 93 | |
d62a17ae | 94 | size = backtrace(buf, RFAPI_DEBUG_BACKTRACE_NENTRIES); |
95 | syms = backtrace_symbols(buf, size); | |
65efcfce | 96 | |
d62a17ae | 97 | for (i = 0; i < size && i < RFAPI_DEBUG_BACKTRACE_NENTRIES; ++i) { |
98 | vnc_zlog_debug_verbose("backtrace[%2zu]: %s", i, syms[i]); | |
99 | } | |
65efcfce | 100 | |
d62a17ae | 101 | free(syms); |
65efcfce LB |
102 | #else |
103 | #endif | |
104 | } | |
105 | ||
106 | /* | |
107 | * DEBUG FUNCTION | |
108 | * Count remote routes and compare with actively-maintained values. | |
109 | * Abort if they disagree. | |
110 | */ | |
4d762f26 | 111 | void rfapiCheckRouteCount(void) |
65efcfce | 112 | { |
d62a17ae | 113 | struct bgp *bgp = bgp_get_default(); |
114 | struct rfapi *h; | |
115 | struct rfapi_import_table *it; | |
116 | afi_t afi; | |
117 | ||
118 | assert(bgp); | |
119 | ||
120 | h = bgp->rfapi; | |
121 | assert(h); | |
122 | ||
123 | for (it = h->imports; it; it = it->next) { | |
124 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
125 | ||
fe08ba7e DS |
126 | struct agg_table *rt; |
127 | struct agg_node *rn; | |
d62a17ae | 128 | |
129 | int holddown_count = 0; | |
d62a17ae | 130 | int imported_count = 0; |
131 | int remote_count = 0; | |
132 | ||
133 | rt = it->imported_vpn[afi]; | |
134 | ||
fe08ba7e DS |
135 | for (rn = agg_route_top(rt); rn; |
136 | rn = agg_route_next(rn)) { | |
40381db7 | 137 | struct bgp_path_info *bpi; |
4b7e6066 | 138 | struct bgp_path_info *next; |
d62a17ae | 139 | |
40381db7 DS |
140 | for (bpi = rn->info; bpi; bpi = next) { |
141 | next = bpi->next; | |
d62a17ae | 142 | |
40381db7 | 143 | if (CHECK_FLAG(bpi->flags, |
1defdda8 | 144 | BGP_PATH_REMOVED)) { |
d62a17ae | 145 | ++holddown_count; |
146 | ||
147 | } else { | |
2cc428be | 148 | if (!RFAPI_LOCAL_BI(bpi)) { |
d62a17ae | 149 | if (RFAPI_DIRECT_IMPORT_BI( |
40381db7 | 150 | bpi)) { |
d62a17ae | 151 | ++imported_count; |
152 | } else { | |
153 | ++remote_count; | |
154 | } | |
155 | } | |
156 | } | |
157 | } | |
158 | } | |
159 | ||
160 | if (it->holddown_count[afi] != holddown_count) { | |
161 | vnc_zlog_debug_verbose( | |
162 | "%s: it->holddown_count %d != holddown_count %d", | |
163 | __func__, it->holddown_count[afi], | |
164 | holddown_count); | |
165 | assert(0); | |
166 | } | |
167 | if (it->remote_count[afi] != remote_count) { | |
168 | vnc_zlog_debug_verbose( | |
169 | "%s: it->remote_count %d != remote_count %d", | |
170 | __func__, it->remote_count[afi], | |
171 | remote_count); | |
172 | assert(0); | |
173 | } | |
174 | if (it->imported_count[afi] != imported_count) { | |
175 | vnc_zlog_debug_verbose( | |
176 | "%s: it->imported_count %d != imported_count %d", | |
177 | __func__, it->imported_count[afi], | |
178 | imported_count); | |
179 | assert(0); | |
180 | } | |
181 | } | |
182 | } | |
65efcfce LB |
183 | } |
184 | ||
1e20238a | 185 | #ifdef DEBUG_ROUTE_COUNTERS |
65efcfce LB |
186 | #define VNC_ITRCCK do {rfapiCheckRouteCount();} while (0) |
187 | #else | |
188 | #define VNC_ITRCCK | |
189 | #endif | |
190 | ||
191 | /* | |
192 | * Validate reference count for a node in an import table | |
193 | * | |
194 | * Normally lockoffset is 0 for nodes in quiescent state. However, | |
fe08ba7e | 195 | * agg_unlock_node will delete the node if it is called when |
65efcfce LB |
196 | * node->lock == 1, and we have to validate the refcount before |
197 | * the node is deleted. In this case, we specify lockoffset 1. | |
198 | */ | |
fe08ba7e | 199 | void rfapiCheckRefcount(struct agg_node *rn, safi_t safi, int lockoffset) |
65efcfce | 200 | { |
40381db7 | 201 | unsigned int count_bpi = 0; |
d62a17ae | 202 | unsigned int count_monitor = 0; |
40381db7 | 203 | struct bgp_path_info *bpi; |
d62a17ae | 204 | struct rfapi_monitor_encap *hme; |
205 | struct rfapi_monitor_vpn *hmv; | |
206 | ||
40381db7 DS |
207 | for (bpi = rn->info; bpi; bpi = bpi->next) |
208 | ++count_bpi; | |
d62a17ae | 209 | |
210 | ||
211 | if (rn->aggregate) { | |
212 | ++count_monitor; /* rfapi_it_extra */ | |
213 | ||
214 | switch (safi) { | |
215 | void *cursor; | |
216 | int rc; | |
217 | ||
218 | case SAFI_ENCAP: | |
219 | for (hme = RFAPI_MONITOR_ENCAP(rn); hme; | |
220 | hme = hme->next) | |
221 | ++count_monitor; | |
222 | break; | |
223 | ||
224 | case SAFI_MPLS_VPN: | |
225 | ||
226 | for (hmv = RFAPI_MONITOR_VPN(rn); hmv; hmv = hmv->next) | |
227 | ++count_monitor; | |
228 | ||
229 | if (RFAPI_MONITOR_EXTERIOR(rn)->source) { | |
230 | ++count_monitor; /* sl */ | |
231 | cursor = NULL; | |
232 | for (rc = skiplist_next( | |
233 | RFAPI_MONITOR_EXTERIOR(rn)->source, | |
234 | NULL, NULL, &cursor); | |
235 | !rc; | |
236 | rc = skiplist_next( | |
237 | RFAPI_MONITOR_EXTERIOR(rn)->source, | |
238 | NULL, NULL, &cursor)) { | |
239 | ||
240 | ++count_monitor; /* sl entry */ | |
241 | } | |
242 | } | |
243 | break; | |
244 | ||
58cf0823 DS |
245 | case SAFI_UNSPEC: |
246 | case SAFI_UNICAST: | |
247 | case SAFI_MULTICAST: | |
248 | case SAFI_EVPN: | |
249 | case SAFI_LABELED_UNICAST: | |
250 | case SAFI_FLOWSPEC: | |
251 | case SAFI_MAX: | |
252 | assert(!"Passed in safi should be impossible"); | |
d62a17ae | 253 | } |
254 | } | |
255 | ||
c10e14e9 DS |
256 | if (count_bpi + count_monitor + lockoffset |
257 | != agg_node_get_lock_count(rn)) { | |
d62a17ae | 258 | vnc_zlog_debug_verbose( |
40381db7 DS |
259 | "%s: count_bpi=%d, count_monitor=%d, lockoffset=%d, rn->lock=%d", |
260 | __func__, count_bpi, count_monitor, lockoffset, | |
c10e14e9 | 261 | agg_node_get_lock_count(rn)); |
d62a17ae | 262 | assert(0); |
263 | } | |
65efcfce LB |
264 | } |
265 | ||
266 | /* | |
267 | * Perform deferred rfapi_close operations that were queued | |
268 | * during callbacks. | |
269 | */ | |
d62a17ae | 270 | static wq_item_status rfapi_deferred_close_workfunc(struct work_queue *q, |
271 | void *data) | |
65efcfce | 272 | { |
d62a17ae | 273 | struct rfapi_descriptor *rfd = data; |
274 | struct rfapi *h = q->spec.data; | |
275 | ||
276 | assert(!(h->flags & RFAPI_INCALLBACK)); | |
277 | rfapi_close(rfd); | |
278 | vnc_zlog_debug_verbose("%s: completed deferred close on handle %p", | |
279 | __func__, rfd); | |
280 | return WQ_SUCCESS; | |
65efcfce LB |
281 | } |
282 | ||
283 | /* | |
284 | * Extract layer 2 option from Encap TLVS in BGP attrs | |
285 | */ | |
d62a17ae | 286 | int rfapiGetL2o(struct attr *attr, struct rfapi_l2address_option *l2o) |
65efcfce | 287 | { |
d62a17ae | 288 | if (attr) { |
d62a17ae | 289 | struct bgp_attr_encap_subtlv *pEncap; |
290 | ||
91ebf12c | 291 | for (pEncap = bgp_attr_get_vnc_subtlvs(attr); pEncap; |
d62a17ae | 292 | pEncap = pEncap->next) { |
293 | ||
294 | if (pEncap->type == BGP_VNC_SUBTLV_TYPE_RFPOPTION) { | |
295 | if (pEncap->value[0] | |
296 | == RFAPI_VN_OPTION_TYPE_L2ADDR) { | |
297 | ||
298 | if (pEncap->value[1] == 14) { | |
299 | memcpy(l2o->macaddr.octet, | |
300 | pEncap->value + 2, | |
28328ea9 | 301 | ETH_ALEN); |
d62a17ae | 302 | l2o->label = |
303 | ((pEncap->value[10] | |
304 | >> 4) | |
305 | & 0x0f) | |
306 | + ((pEncap->value[9] | |
307 | << 4) | |
308 | & 0xff0) | |
309 | + ((pEncap->value[8] | |
310 | << 12) | |
311 | & 0xff000); | |
312 | ||
313 | l2o->local_nve_id = | |
314 | pEncap->value[12]; | |
315 | ||
316 | l2o->logical_net_id = | |
317 | (pEncap->value[15] | |
318 | & 0xff) | |
319 | + ((pEncap->value[14] | |
320 | << 8) | |
321 | & 0xff00) | |
322 | + ((pEncap->value[13] | |
323 | << 16) | |
324 | & 0xff0000); | |
325 | } | |
326 | ||
327 | return 0; | |
328 | } | |
329 | } | |
330 | } | |
331 | } | |
332 | ||
333 | return ENOENT; | |
65efcfce LB |
334 | } |
335 | ||
336 | /* | |
337 | * Extract the lifetime from the Tunnel Encap attribute of a route in | |
338 | * an import table | |
339 | */ | |
d62a17ae | 340 | int rfapiGetVncLifetime(struct attr *attr, uint32_t *lifetime) |
65efcfce | 341 | { |
d62a17ae | 342 | struct bgp_attr_encap_subtlv *pEncap; |
65efcfce | 343 | |
d62a17ae | 344 | *lifetime = RFAPI_INFINITE_LIFETIME; /* default to infinite */ |
65efcfce | 345 | |
d62a17ae | 346 | if (attr) { |
65efcfce | 347 | |
91ebf12c | 348 | for (pEncap = bgp_attr_get_vnc_subtlvs(attr); pEncap; |
d62a17ae | 349 | pEncap = pEncap->next) { |
65efcfce | 350 | |
d62a17ae | 351 | if (pEncap->type |
352 | == BGP_VNC_SUBTLV_TYPE_LIFETIME) { /* lifetime */ | |
353 | if (pEncap->length == 4) { | |
354 | memcpy(lifetime, pEncap->value, 4); | |
355 | *lifetime = ntohl(*lifetime); | |
356 | return 0; | |
357 | } | |
358 | } | |
359 | } | |
360 | } | |
65efcfce | 361 | |
d62a17ae | 362 | return ENOENT; |
65efcfce LB |
363 | } |
364 | ||
65efcfce LB |
365 | /* |
366 | * Look for UN address in Encap attribute | |
367 | */ | |
d62a17ae | 368 | int rfapiGetVncTunnelUnAddr(struct attr *attr, struct prefix *p) |
65efcfce | 369 | { |
d62a17ae | 370 | struct bgp_attr_encap_subtlv *pEncap; |
f4bd90c5 | 371 | bgp_encap_types tun_type = BGP_ENCAP_TYPE_MPLS;/*Default tunnel type*/ |
d62a17ae | 372 | |
f4bd90c5 | 373 | bgp_attr_extcom_tunnel_type(attr, &tun_type); |
d62a17ae | 374 | if (tun_type == BGP_ENCAP_TYPE_MPLS) { |
375 | if (!p) | |
376 | return 0; | |
377 | /* MPLS carries UN address in next hop */ | |
378 | rfapiNexthop2Prefix(attr, p); | |
c7ca5ccf | 379 | if (p->family != AF_UNSPEC) |
d62a17ae | 380 | return 0; |
381 | ||
382 | return ENOENT; | |
383 | } | |
384 | if (attr) { | |
385 | for (pEncap = attr->encap_subtlvs; pEncap; | |
386 | pEncap = pEncap->next) { | |
387 | ||
388 | if (pEncap->type | |
389 | == BGP_ENCAP_SUBTLV_TYPE_REMOTE_ENDPOINT) { /* un | |
390 | addr | |
391 | */ | |
392 | switch (pEncap->length) { | |
393 | case 8: | |
394 | if (p) { | |
395 | p->family = AF_INET; | |
30360041 | 396 | p->prefixlen = IPV4_MAX_BITLEN; |
d62a17ae | 397 | memcpy(p->u.val, pEncap->value, |
398 | 4); | |
399 | } | |
400 | return 0; | |
401 | ||
402 | case 20: | |
403 | if (p) { | |
404 | p->family = AF_INET6; | |
135e9bdb | 405 | p->prefixlen = IPV6_MAX_BITLEN; |
d62a17ae | 406 | memcpy(p->u.val, pEncap->value, |
407 | 16); | |
408 | } | |
409 | return 0; | |
410 | } | |
411 | } | |
412 | } | |
413 | } | |
414 | ||
415 | return ENOENT; | |
65efcfce LB |
416 | } |
417 | ||
418 | /* | |
419 | * Get UN address wherever it might be | |
420 | */ | |
40381db7 | 421 | int rfapiGetUnAddrOfVpnBi(struct bgp_path_info *bpi, struct prefix *p) |
65efcfce | 422 | { |
d62a17ae | 423 | /* If it's in this route's VNC attribute, we're done */ |
40381db7 | 424 | if (!rfapiGetVncTunnelUnAddr(bpi->attr, p)) |
d62a17ae | 425 | return 0; |
426 | /* | |
427 | * Otherwise, see if it's cached from a corresponding ENCAP SAFI | |
428 | * advertisement | |
429 | */ | |
40381db7 DS |
430 | if (bpi->extra) { |
431 | switch (bpi->extra->vnc.import.un_family) { | |
d62a17ae | 432 | case AF_INET: |
433 | if (p) { | |
40381db7 DS |
434 | p->family = bpi->extra->vnc.import.un_family; |
435 | p->u.prefix4 = bpi->extra->vnc.import.un.addr4; | |
30360041 | 436 | p->prefixlen = IPV4_MAX_BITLEN; |
d62a17ae | 437 | } |
438 | return 0; | |
439 | case AF_INET6: | |
440 | if (p) { | |
40381db7 DS |
441 | p->family = bpi->extra->vnc.import.un_family; |
442 | p->u.prefix6 = bpi->extra->vnc.import.un.addr6; | |
135e9bdb | 443 | p->prefixlen = IPV6_MAX_BITLEN; |
d62a17ae | 444 | } |
445 | return 0; | |
446 | default: | |
447 | if (p) | |
c7ca5ccf | 448 | p->family = AF_UNSPEC; |
1e20238a | 449 | #ifdef DEBUG_ENCAP_MONITOR |
d62a17ae | 450 | vnc_zlog_debug_verbose( |
40381db7 | 451 | "%s: bpi->extra->vnc.import.un_family is 0, no UN addr", |
d62a17ae | 452 | __func__); |
65efcfce | 453 | #endif |
d62a17ae | 454 | break; |
455 | } | |
456 | } | |
65efcfce | 457 | |
d62a17ae | 458 | return ENOENT; |
65efcfce LB |
459 | } |
460 | ||
461 | ||
462 | /* | |
9b6d8fcf | 463 | * Make a new bgp_path_info from gathered parameters |
65efcfce | 464 | */ |
4b7e6066 DS |
465 | static struct bgp_path_info *rfapiBgpInfoCreate(struct attr *attr, |
466 | struct peer *peer, void *rfd, | |
467 | struct prefix_rd *prd, | |
468 | uint8_t type, uint8_t sub_type, | |
469 | uint32_t *label) | |
65efcfce | 470 | { |
4b7e6066 | 471 | struct bgp_path_info *new; |
d62a17ae | 472 | |
9591da26 DS |
473 | new = info_make(type, sub_type, 0, peer, attr, NULL); |
474 | ||
05864da7 | 475 | new->attr = bgp_attr_intern(attr); |
d62a17ae | 476 | |
18ee8310 | 477 | bgp_path_info_extra_get(new); |
d62a17ae | 478 | if (prd) { |
479 | new->extra->vnc.import.rd = *prd; | |
98b7e975 | 480 | new->extra->vnc.import.create_time = monotime(NULL); |
d62a17ae | 481 | } |
482 | if (label) | |
317f1fe0 | 483 | encode_label(*label, &new->extra->label[0]); |
9591da26 | 484 | |
d62a17ae | 485 | peer_lock(peer); |
486 | ||
487 | return new; | |
65efcfce LB |
488 | } |
489 | ||
490 | /* | |
9b6d8fcf | 491 | * Frees bgp_path_info as used in import tables (parts are not |
65efcfce LB |
492 | * allocated exactly the way they are in the main RIBs) |
493 | */ | |
4b7e6066 | 494 | static void rfapiBgpInfoFree(struct bgp_path_info *goner) |
65efcfce | 495 | { |
d62a17ae | 496 | if (!goner) |
497 | return; | |
498 | ||
499 | if (goner->peer) { | |
500 | vnc_zlog_debug_verbose("%s: calling peer_unlock(%p), #%d", | |
501 | __func__, goner->peer, | |
502 | goner->peer->lock); | |
503 | peer_unlock(goner->peer); | |
504 | } | |
505 | ||
05864da7 DS |
506 | bgp_attr_unintern(&goner->attr); |
507 | ||
a2e219fe PG |
508 | if (goner->extra) |
509 | bgp_path_info_extra_free(&goner->extra); | |
d62a17ae | 510 | XFREE(MTYPE_BGP_ROUTE, goner); |
65efcfce LB |
511 | } |
512 | ||
d62a17ae | 513 | struct rfapi_import_table *rfapiMacImportTableGetNoAlloc(struct bgp *bgp, |
514 | uint32_t lni) | |
65efcfce | 515 | { |
d62a17ae | 516 | struct rfapi *h; |
517 | struct rfapi_import_table *it = NULL; | |
518 | uintptr_t lni_as_ptr = lni; | |
65efcfce | 519 | |
d62a17ae | 520 | h = bgp->rfapi; |
521 | if (!h) | |
522 | return NULL; | |
65efcfce | 523 | |
d62a17ae | 524 | if (!h->import_mac) |
525 | return NULL; | |
65efcfce | 526 | |
d62a17ae | 527 | if (skiplist_search(h->import_mac, (void *)lni_as_ptr, (void **)&it)) |
528 | return NULL; | |
65efcfce | 529 | |
d62a17ae | 530 | return it; |
65efcfce LB |
531 | } |
532 | ||
d62a17ae | 533 | struct rfapi_import_table *rfapiMacImportTableGet(struct bgp *bgp, uint32_t lni) |
65efcfce | 534 | { |
d62a17ae | 535 | struct rfapi *h; |
536 | struct rfapi_import_table *it = NULL; | |
537 | uintptr_t lni_as_ptr = lni; | |
538 | ||
539 | h = bgp->rfapi; | |
540 | assert(h); | |
541 | ||
542 | if (!h->import_mac) { | |
543 | /* default cmp is good enough for LNI */ | |
544 | h->import_mac = skiplist_new(0, NULL, NULL); | |
545 | } | |
546 | ||
547 | if (skiplist_search(h->import_mac, (void *)lni_as_ptr, (void **)&it)) { | |
548 | ||
549 | struct ecommunity *enew; | |
550 | struct ecommunity_val eval; | |
551 | afi_t afi; | |
552 | ||
553 | it = XCALLOC(MTYPE_RFAPI_IMPORTTABLE, | |
554 | sizeof(struct rfapi_import_table)); | |
555 | /* set RT list of new import table based on LNI */ | |
556 | memset((char *)&eval, 0, sizeof(eval)); | |
557 | eval.val[0] = 0; /* VNC L2VPN */ | |
558 | eval.val[1] = 2; /* VNC L2VPN */ | |
559 | eval.val[5] = (lni >> 16) & 0xff; | |
560 | eval.val[6] = (lni >> 8) & 0xff; | |
561 | eval.val[7] = (lni >> 0) & 0xff; | |
562 | ||
563 | enew = ecommunity_new(); | |
1207a5bc | 564 | ecommunity_add_val(enew, &eval, false, false); |
d62a17ae | 565 | it->rt_import_list = enew; |
566 | ||
567 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
fe08ba7e DS |
568 | it->imported_vpn[afi] = agg_table_init(); |
569 | it->imported_encap[afi] = agg_table_init(); | |
d62a17ae | 570 | } |
571 | ||
572 | it->l2_logical_net_id = lni; | |
573 | ||
574 | skiplist_insert(h->import_mac, (void *)lni_as_ptr, it); | |
575 | } | |
576 | ||
577 | assert(it); | |
578 | return it; | |
65efcfce LB |
579 | } |
580 | ||
581 | /* | |
582 | * Implement MONITOR_MOVE_SHORTER(original_node) from | |
583 | * RFAPI-Import-Event-Handling.txt | |
d62a17ae | 584 | * |
65efcfce LB |
585 | * Returns pointer to the list of moved monitors |
586 | */ | |
587 | static struct rfapi_monitor_vpn * | |
fe08ba7e | 588 | rfapiMonitorMoveShorter(struct agg_node *original_vpn_node, int lockoffset) |
65efcfce | 589 | { |
40381db7 | 590 | struct bgp_path_info *bpi; |
fe08ba7e | 591 | struct agg_node *par; |
d62a17ae | 592 | struct rfapi_monitor_vpn *m; |
593 | struct rfapi_monitor_vpn *mlast; | |
594 | struct rfapi_monitor_vpn *moved; | |
595 | int movecount = 0; | |
596 | int parent_already_refcounted = 0; | |
65efcfce | 597 | |
d62a17ae | 598 | RFAPI_CHECK_REFCOUNT(original_vpn_node, SAFI_MPLS_VPN, lockoffset); |
65efcfce | 599 | |
1e20238a | 600 | #ifdef DEBUG_MONITOR_MOVE_SHORTER |
d62a17ae | 601 | { |
2dbe669b DA |
602 | vnc_zlog_debug_verbose("%s: called with node pfx=%pFX", |
603 | __func__, &original_vpn_node->p); | |
d62a17ae | 604 | } |
65efcfce LB |
605 | #endif |
606 | ||
d62a17ae | 607 | /* |
40381db7 | 608 | * 1. If there is at least one bpi (either regular route or |
d62a17ae | 609 | * route marked as withdrawn, with a pending timer) at |
610 | * original_node with a valid UN address, we're done. Return. | |
611 | */ | |
40381db7 | 612 | for (bpi = original_vpn_node->info; bpi; bpi = bpi->next) { |
d62a17ae | 613 | struct prefix pfx; |
614 | ||
40381db7 | 615 | if (!rfapiGetUnAddrOfVpnBi(bpi, &pfx)) { |
1e20238a | 616 | #ifdef DEBUG_MONITOR_MOVE_SHORTER |
d62a17ae | 617 | vnc_zlog_debug_verbose( |
618 | "%s: have valid UN at original node, no change", | |
619 | __func__); | |
65efcfce | 620 | #endif |
d62a17ae | 621 | return NULL; |
622 | } | |
623 | } | |
624 | ||
625 | /* | |
626 | * 2. Travel up the tree (toward less-specific prefixes) from | |
627 | * original_node to find the first node that has at least | |
628 | * one route (even if it is only a withdrawn route) with a | |
629 | * valid UN address. Call this node "Node P." | |
630 | */ | |
fe08ba7e DS |
631 | for (par = agg_node_parent(original_vpn_node); par; |
632 | par = agg_node_parent(par)) { | |
40381db7 | 633 | for (bpi = par->info; bpi; bpi = bpi->next) { |
d62a17ae | 634 | struct prefix pfx; |
40381db7 | 635 | if (!rfapiGetUnAddrOfVpnBi(bpi, &pfx)) { |
d62a17ae | 636 | break; |
637 | } | |
638 | } | |
40381db7 | 639 | if (bpi) |
d62a17ae | 640 | break; |
641 | } | |
642 | ||
643 | if (par) { | |
644 | RFAPI_CHECK_REFCOUNT(par, SAFI_MPLS_VPN, 0); | |
645 | } | |
646 | ||
647 | /* | |
648 | * If no less-specific routes, try to use the 0/0 node | |
649 | */ | |
650 | if (!par) { | |
26a3ffd6 | 651 | const struct prefix *p; |
d62a17ae | 652 | /* this isn't necessarily 0/0 */ |
fe08ba7e | 653 | par = agg_route_table_top(original_vpn_node); |
d62a17ae | 654 | |
26a3ffd6 DS |
655 | if (par) |
656 | p = agg_node_get_prefix(par); | |
d62a17ae | 657 | /* |
658 | * If we got the top node but it wasn't 0/0, | |
659 | * ignore it | |
660 | */ | |
26a3ffd6 | 661 | if (par && p->prefixlen) { |
fe08ba7e | 662 | agg_unlock_node(par); /* maybe free */ |
d62a17ae | 663 | par = NULL; |
664 | } | |
665 | ||
666 | if (par) { | |
667 | ++parent_already_refcounted; | |
668 | } | |
669 | } | |
670 | ||
671 | /* | |
672 | * Create 0/0 node if it isn't there | |
673 | */ | |
674 | if (!par) { | |
675 | struct prefix pfx_default; | |
26a3ffd6 | 676 | const struct prefix *p = agg_node_get_prefix(original_vpn_node); |
d62a17ae | 677 | |
678 | memset(&pfx_default, 0, sizeof(pfx_default)); | |
26a3ffd6 | 679 | pfx_default.family = p->family; |
d62a17ae | 680 | |
681 | /* creates default node if none exists */ | |
fe08ba7e DS |
682 | par = agg_node_get(agg_get_table(original_vpn_node), |
683 | &pfx_default); | |
d62a17ae | 684 | ++parent_already_refcounted; |
685 | } | |
686 | ||
687 | /* | |
688 | * 3. Move each of the monitors found at original_node to Node P. | |
689 | * These are "Moved Monitors." | |
690 | * | |
691 | */ | |
692 | ||
693 | /* | |
694 | * Attach at end so that the list pointer we return points | |
695 | * only to the moved routes | |
696 | */ | |
697 | for (m = RFAPI_MONITOR_VPN(par), mlast = NULL; m; | |
698 | mlast = m, m = m->next) | |
699 | ; | |
700 | ||
701 | if (mlast) { | |
702 | moved = mlast->next = RFAPI_MONITOR_VPN(original_vpn_node); | |
703 | } else { | |
704 | moved = RFAPI_MONITOR_VPN_W_ALLOC(par) = | |
705 | RFAPI_MONITOR_VPN(original_vpn_node); | |
706 | } | |
707 | if (RFAPI_MONITOR_VPN( | |
708 | original_vpn_node)) /* check agg, so not allocated */ | |
709 | RFAPI_MONITOR_VPN_W_ALLOC(original_vpn_node) = NULL; | |
710 | ||
711 | /* | |
712 | * update the node pointers on the monitors | |
713 | */ | |
714 | for (m = moved; m; m = m->next) { | |
715 | ++movecount; | |
716 | m->node = par; | |
717 | } | |
718 | ||
719 | RFAPI_CHECK_REFCOUNT(par, SAFI_MPLS_VPN, | |
720 | parent_already_refcounted - movecount); | |
721 | while (movecount > parent_already_refcounted) { | |
fe08ba7e | 722 | agg_lock_node(par); |
d62a17ae | 723 | ++parent_already_refcounted; |
724 | } | |
725 | while (movecount < parent_already_refcounted) { | |
726 | /* unlikely, but code defensively */ | |
fe08ba7e | 727 | agg_unlock_node(par); |
d62a17ae | 728 | --parent_already_refcounted; |
729 | } | |
730 | RFAPI_CHECK_REFCOUNT(original_vpn_node, SAFI_MPLS_VPN, | |
731 | movecount + lockoffset); | |
732 | while (movecount--) { | |
fe08ba7e | 733 | agg_unlock_node(original_vpn_node); |
d62a17ae | 734 | } |
65efcfce | 735 | |
1e20238a | 736 | #ifdef DEBUG_MONITOR_MOVE_SHORTER |
d62a17ae | 737 | { |
2dbe669b DA |
738 | vnc_zlog_debug_verbose("%s: moved to node pfx=%pFX", __func__, |
739 | &par->p); | |
d62a17ae | 740 | } |
65efcfce LB |
741 | #endif |
742 | ||
743 | ||
d62a17ae | 744 | return moved; |
65efcfce LB |
745 | } |
746 | ||
747 | /* | |
748 | * Implement MONITOR_MOVE_LONGER(new_node) from | |
749 | * RFAPI-Import-Event-Handling.txt | |
750 | */ | |
fe08ba7e | 751 | static void rfapiMonitorMoveLonger(struct agg_node *new_vpn_node) |
65efcfce | 752 | { |
d62a17ae | 753 | struct rfapi_monitor_vpn *monitor; |
754 | struct rfapi_monitor_vpn *mlast; | |
40381db7 | 755 | struct bgp_path_info *bpi; |
fe08ba7e | 756 | struct agg_node *par; |
26a3ffd6 | 757 | const struct prefix *new_vpn_node_p = agg_node_get_prefix(new_vpn_node); |
d62a17ae | 758 | |
759 | RFAPI_CHECK_REFCOUNT(new_vpn_node, SAFI_MPLS_VPN, 0); | |
760 | ||
761 | /* | |
762 | * Make sure we have at least one valid route at the new node | |
763 | */ | |
40381db7 | 764 | for (bpi = new_vpn_node->info; bpi; bpi = bpi->next) { |
d62a17ae | 765 | struct prefix pfx; |
40381db7 | 766 | if (!rfapiGetUnAddrOfVpnBi(bpi, &pfx)) |
d62a17ae | 767 | break; |
768 | } | |
769 | ||
40381db7 | 770 | if (!bpi) { |
d62a17ae | 771 | vnc_zlog_debug_verbose( |
772 | "%s: no valid routes at node %p, so not attempting moves", | |
773 | __func__, new_vpn_node); | |
774 | return; | |
775 | } | |
776 | ||
777 | /* | |
778 | * Find first parent node that has monitors | |
779 | */ | |
fe08ba7e DS |
780 | for (par = agg_node_parent(new_vpn_node); par; |
781 | par = agg_node_parent(par)) { | |
d62a17ae | 782 | if (RFAPI_MONITOR_VPN(par)) |
783 | break; | |
784 | } | |
785 | ||
786 | if (!par) { | |
787 | vnc_zlog_debug_verbose( | |
788 | "%s: no parent nodes with monitors, done", __func__); | |
789 | return; | |
790 | } | |
791 | ||
792 | /* | |
793 | * Check each of these monitors to see of their longest-match | |
794 | * is now the updated node. Move any such monitors to the more- | |
795 | * specific updated node | |
796 | */ | |
797 | for (mlast = NULL, monitor = RFAPI_MONITOR_VPN(par); monitor;) { | |
d62a17ae | 798 | /* |
799 | * If new longest match for monitor prefix is the new | |
800 | * route's prefix, move monitor to new route's prefix | |
801 | */ | |
26a3ffd6 | 802 | if (prefix_match(new_vpn_node_p, &monitor->p)) { |
d62a17ae | 803 | /* detach */ |
804 | if (mlast) { | |
805 | mlast->next = monitor->next; | |
806 | } else { | |
807 | RFAPI_MONITOR_VPN_W_ALLOC(par) = monitor->next; | |
808 | } | |
809 | ||
810 | ||
811 | /* attach */ | |
812 | monitor->next = RFAPI_MONITOR_VPN(new_vpn_node); | |
813 | RFAPI_MONITOR_VPN_W_ALLOC(new_vpn_node) = monitor; | |
814 | monitor->node = new_vpn_node; | |
815 | ||
fe08ba7e | 816 | agg_lock_node(new_vpn_node); /* incr refcount */ |
d62a17ae | 817 | |
818 | monitor = mlast ? mlast->next : RFAPI_MONITOR_VPN(par); | |
819 | ||
820 | RFAPI_CHECK_REFCOUNT(par, SAFI_MPLS_VPN, 1); | |
821 | /* decr refcount after we're done with par as this might | |
822 | * free it */ | |
fe08ba7e | 823 | agg_unlock_node(par); |
d62a17ae | 824 | |
825 | continue; | |
826 | } | |
827 | mlast = monitor; | |
828 | monitor = monitor->next; | |
829 | } | |
830 | ||
831 | RFAPI_CHECK_REFCOUNT(new_vpn_node, SAFI_MPLS_VPN, 0); | |
65efcfce LB |
832 | } |
833 | ||
834 | ||
40381db7 | 835 | static void rfapiBgpInfoChainFree(struct bgp_path_info *bpi) |
65efcfce | 836 | { |
4b7e6066 | 837 | struct bgp_path_info *next; |
d62a17ae | 838 | |
40381db7 | 839 | while (bpi) { |
d62a17ae | 840 | |
841 | /* | |
40381db7 | 842 | * If there is a timer waiting to delete this bpi, cancel |
d62a17ae | 843 | * the timer and delete immediately |
844 | */ | |
40381db7 DS |
845 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
846 | && bpi->extra->vnc.import.timer) { | |
c3aaa89a | 847 | struct rfapi_withdraw *wcb = |
e16d030c | 848 | EVENT_ARG(bpi->extra->vnc.import.timer); |
d62a17ae | 849 | |
850 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
e16d030c | 851 | EVENT_OFF(bpi->extra->vnc.import.timer); |
d62a17ae | 852 | } |
853 | ||
40381db7 DS |
854 | next = bpi->next; |
855 | bpi->next = NULL; | |
856 | rfapiBgpInfoFree(bpi); | |
857 | bpi = next; | |
d62a17ae | 858 | } |
65efcfce LB |
859 | } |
860 | ||
d62a17ae | 861 | static void rfapiImportTableFlush(struct rfapi_import_table *it) |
65efcfce | 862 | { |
d62a17ae | 863 | afi_t afi; |
864 | ||
865 | /* | |
866 | * Free ecommunity | |
867 | */ | |
868 | ecommunity_free(&it->rt_import_list); | |
869 | it->rt_import_list = NULL; | |
870 | ||
871 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
872 | ||
fe08ba7e | 873 | struct agg_node *rn; |
cd886395 | 874 | struct agg_table *at; |
d62a17ae | 875 | |
cd886395 PZ |
876 | at = it->imported_vpn[afi]; |
877 | if (at) { | |
878 | for (rn = agg_route_top(at); rn; | |
879 | rn = agg_route_next(rn)) { | |
880 | /* | |
881 | * Each route_node has: | |
882 | * aggregate: points to rfapi_it_extra with | |
883 | * monitor chain(s) | |
884 | * info: points to chain of bgp_path_info | |
885 | */ | |
886 | /* free bgp_path_info and its children */ | |
887 | rfapiBgpInfoChainFree(rn->info); | |
888 | rn->info = NULL; | |
d62a17ae | 889 | |
cd886395 PZ |
890 | rfapiMonitorExtraFlush(SAFI_MPLS_VPN, rn); |
891 | } | |
892 | agg_table_finish(at); | |
d62a17ae | 893 | } |
894 | ||
cd886395 PZ |
895 | if (at) { |
896 | at = it->imported_encap[afi]; | |
897 | for (rn = agg_route_top(at); rn; | |
898 | rn = agg_route_next(rn)) { | |
899 | /* free bgp_path_info and its children */ | |
900 | rfapiBgpInfoChainFree(rn->info); | |
901 | rn->info = NULL; | |
d62a17ae | 902 | |
cd886395 PZ |
903 | rfapiMonitorExtraFlush(SAFI_ENCAP, rn); |
904 | } | |
905 | agg_table_finish(at); | |
d62a17ae | 906 | } |
d62a17ae | 907 | } |
908 | if (it->monitor_exterior_orphans) { | |
909 | skiplist_free(it->monitor_exterior_orphans); | |
910 | } | |
65efcfce LB |
911 | } |
912 | ||
d62a17ae | 913 | void rfapiImportTableRefDelByIt(struct bgp *bgp, |
914 | struct rfapi_import_table *it_target) | |
65efcfce | 915 | { |
d62a17ae | 916 | struct rfapi *h; |
917 | struct rfapi_import_table *it; | |
918 | struct rfapi_import_table *prev = NULL; | |
919 | ||
920 | assert(it_target); | |
921 | ||
922 | h = bgp->rfapi; | |
923 | assert(h); | |
924 | ||
925 | for (it = h->imports; it; prev = it, it = it->next) { | |
926 | if (it == it_target) | |
927 | break; | |
928 | } | |
929 | ||
930 | assert(it); | |
931 | assert(it->refcount); | |
932 | ||
933 | it->refcount -= 1; | |
934 | ||
935 | if (!it->refcount) { | |
936 | if (prev) { | |
937 | prev->next = it->next; | |
938 | } else { | |
939 | h->imports = it->next; | |
940 | } | |
941 | rfapiImportTableFlush(it); | |
942 | XFREE(MTYPE_RFAPI_IMPORTTABLE, it); | |
943 | } | |
65efcfce LB |
944 | } |
945 | ||
1e20238a | 946 | #ifdef RFAPI_REQUIRE_ENCAP_BEEC |
65efcfce LB |
947 | /* |
948 | * Look for magic BGP Encapsulation Extended Community value | |
949 | * Format in RFC 5512 Sect. 4.5 | |
950 | */ | |
d62a17ae | 951 | static int rfapiEcommunitiesMatchBeec(struct ecommunity *ecom, |
952 | bgp_encap_types type) | |
65efcfce | 953 | { |
d62a17ae | 954 | int i; |
65efcfce | 955 | |
d62a17ae | 956 | if (!ecom) |
957 | return 0; | |
65efcfce | 958 | |
d62a17ae | 959 | for (i = 0; i < (ecom->size * ECOMMUNITY_SIZE); i += ECOMMUNITY_SIZE) { |
65efcfce | 960 | |
d62a17ae | 961 | uint8_t *ep; |
65efcfce | 962 | |
d62a17ae | 963 | ep = ecom->val + i; |
65efcfce | 964 | |
d62a17ae | 965 | if (ep[0] == ECOMMUNITY_ENCODE_OPAQUE |
966 | && ep[1] == ECOMMUNITY_OPAQUE_SUBTYPE_ENCAP | |
967 | && ep[6] == ((type && 0xff00) >> 8) | |
968 | && ep[7] == (type & 0xff)) { | |
65efcfce | 969 | |
d62a17ae | 970 | return 1; |
971 | } | |
972 | } | |
973 | return 0; | |
65efcfce LB |
974 | } |
975 | #endif | |
976 | ||
d62a17ae | 977 | int rfapiEcommunitiesIntersect(struct ecommunity *e1, struct ecommunity *e2) |
65efcfce | 978 | { |
f6e07e1b | 979 | uint32_t i, j; |
d62a17ae | 980 | |
981 | if (!e1 || !e2) | |
982 | return 0; | |
983 | ||
984 | { | |
985 | char *s1, *s2; | |
986 | s1 = ecommunity_ecom2str(e1, ECOMMUNITY_FORMAT_DISPLAY, 0); | |
987 | s2 = ecommunity_ecom2str(e2, ECOMMUNITY_FORMAT_DISPLAY, 0); | |
988 | vnc_zlog_debug_verbose("%s: e1[%s], e2[%s]", __func__, s1, s2); | |
989 | XFREE(MTYPE_ECOMMUNITY_STR, s1); | |
990 | XFREE(MTYPE_ECOMMUNITY_STR, s2); | |
991 | } | |
992 | ||
993 | for (i = 0; i < e1->size; ++i) { | |
994 | for (j = 0; j < e2->size; ++j) { | |
995 | if (!memcmp(e1->val + (i * ECOMMUNITY_SIZE), | |
996 | e2->val + (j * ECOMMUNITY_SIZE), | |
997 | ECOMMUNITY_SIZE)) { | |
998 | ||
999 | return 1; | |
1000 | } | |
1001 | } | |
1002 | } | |
1003 | return 0; | |
65efcfce LB |
1004 | } |
1005 | ||
d62a17ae | 1006 | int rfapiEcommunityGetLNI(struct ecommunity *ecom, uint32_t *lni) |
65efcfce | 1007 | { |
d62a17ae | 1008 | if (ecom) { |
f6e07e1b DS |
1009 | uint32_t i; |
1010 | ||
d62a17ae | 1011 | for (i = 0; i < ecom->size; ++i) { |
1012 | uint8_t *p = ecom->val + (i * ECOMMUNITY_SIZE); | |
1013 | ||
1014 | if ((*(p + 0) == 0x00) && (*(p + 1) == 0x02)) { | |
1015 | ||
1016 | *lni = (*(p + 5) << 16) | (*(p + 6) << 8) | |
1017 | | (*(p + 7)); | |
1018 | return 0; | |
1019 | } | |
1020 | } | |
1021 | } | |
1022 | return ENOENT; | |
65efcfce LB |
1023 | } |
1024 | ||
d62a17ae | 1025 | int rfapiEcommunityGetEthernetTag(struct ecommunity *ecom, uint16_t *tag_id) |
79799987 | 1026 | { |
d62a17ae | 1027 | struct bgp *bgp = bgp_get_default(); |
1028 | *tag_id = 0; /* default to untagged */ | |
1029 | if (ecom) { | |
f6e07e1b DS |
1030 | uint32_t i; |
1031 | ||
d62a17ae | 1032 | for (i = 0; i < ecom->size; ++i) { |
1033 | as_t as = 0; | |
1034 | int encode = 0; | |
1be1693e | 1035 | const uint8_t *p = ecom->val + (i * ECOMMUNITY_SIZE); |
d62a17ae | 1036 | |
1037 | /* High-order octet of type. */ | |
1038 | encode = *p++; | |
1039 | ||
1040 | if (*p++ == ECOMMUNITY_ROUTE_TARGET) { | |
1041 | if (encode == ECOMMUNITY_ENCODE_AS4) { | |
937652c6 | 1042 | p = ptr_get_be32(p, &as); |
d62a17ae | 1043 | } else if (encode == ECOMMUNITY_ENCODE_AS) { |
1044 | as = (*p++ << 8); | |
1045 | as |= (*p++); | |
996c9314 LB |
1046 | p += 2; /* skip next two, tag/vid |
1047 | always in lowest bytes */ | |
d62a17ae | 1048 | } |
1049 | if (as == bgp->as) { | |
1050 | *tag_id = *p++ << 8; | |
1051 | *tag_id |= (*p++); | |
1052 | return 0; | |
1053 | } | |
1054 | } | |
1055 | } | |
1056 | } | |
1057 | return ENOENT; | |
79799987 LB |
1058 | } |
1059 | ||
40381db7 | 1060 | static int rfapiVpnBiNhEqualsPt(struct bgp_path_info *bpi, |
4b7e6066 | 1061 | struct rfapi_ip_addr *hpt) |
65efcfce | 1062 | { |
d62a17ae | 1063 | uint8_t family; |
65efcfce | 1064 | |
40381db7 | 1065 | if (!hpt || !bpi) |
d62a17ae | 1066 | return 0; |
65efcfce | 1067 | |
40381db7 | 1068 | family = BGP_MP_NEXTHOP_FAMILY(bpi->attr->mp_nexthop_len); |
65efcfce | 1069 | |
d62a17ae | 1070 | if (hpt->addr_family != family) |
1071 | return 0; | |
65efcfce | 1072 | |
d62a17ae | 1073 | switch (family) { |
1074 | case AF_INET: | |
40381db7 | 1075 | if (bpi->attr->mp_nexthop_global_in.s_addr |
d62a17ae | 1076 | != hpt->addr.v4.s_addr) |
1077 | return 0; | |
1078 | break; | |
65efcfce | 1079 | |
d62a17ae | 1080 | case AF_INET6: |
40381db7 | 1081 | if (IPV6_ADDR_CMP(&bpi->attr->mp_nexthop_global, &hpt->addr.v6)) |
d62a17ae | 1082 | return 0; |
1083 | break; | |
65efcfce | 1084 | |
d62a17ae | 1085 | default: |
1086 | return 0; | |
d62a17ae | 1087 | } |
65efcfce | 1088 | |
d62a17ae | 1089 | return 1; |
65efcfce LB |
1090 | } |
1091 | ||
1092 | ||
1093 | /* | |
1094 | * Compare 2 VPN BIs. Return true if they have the same VN and UN addresses | |
1095 | */ | |
40381db7 DS |
1096 | static int rfapiVpnBiSamePtUn(struct bgp_path_info *bpi1, |
1097 | struct bgp_path_info *bpi2) | |
65efcfce | 1098 | { |
d62a17ae | 1099 | struct prefix pfx_un1; |
1100 | struct prefix pfx_un2; | |
1101 | ||
40381db7 | 1102 | if (!bpi1 || !bpi2) |
d62a17ae | 1103 | return 0; |
1104 | ||
d62a17ae | 1105 | /* |
1106 | * VN address comparisons | |
1107 | */ | |
1108 | ||
40381db7 DS |
1109 | if (BGP_MP_NEXTHOP_FAMILY(bpi1->attr->mp_nexthop_len) |
1110 | != BGP_MP_NEXTHOP_FAMILY(bpi2->attr->mp_nexthop_len)) { | |
d62a17ae | 1111 | return 0; |
1112 | } | |
1113 | ||
40381db7 | 1114 | switch (BGP_MP_NEXTHOP_FAMILY(bpi1->attr->mp_nexthop_len)) { |
d62a17ae | 1115 | case AF_INET: |
40381db7 DS |
1116 | if (bpi1->attr->mp_nexthop_global_in.s_addr |
1117 | != bpi2->attr->mp_nexthop_global_in.s_addr) | |
d62a17ae | 1118 | return 0; |
1119 | break; | |
1120 | ||
1121 | case AF_INET6: | |
40381db7 DS |
1122 | if (IPV6_ADDR_CMP(&bpi1->attr->mp_nexthop_global, |
1123 | &bpi2->attr->mp_nexthop_global)) | |
d62a17ae | 1124 | return 0; |
1125 | break; | |
1126 | ||
1127 | default: | |
1128 | return 0; | |
d62a17ae | 1129 | } |
1130 | ||
fa3bf3a2 MS |
1131 | memset(&pfx_un1, 0, sizeof(pfx_un1)); |
1132 | memset(&pfx_un2, 0, sizeof(pfx_un2)); | |
1133 | ||
d62a17ae | 1134 | /* |
1135 | * UN address comparisons | |
1136 | */ | |
40381db7 DS |
1137 | if (rfapiGetVncTunnelUnAddr(bpi1->attr, &pfx_un1)) { |
1138 | if (bpi1->extra) { | |
1139 | pfx_un1.family = bpi1->extra->vnc.import.un_family; | |
1140 | switch (bpi1->extra->vnc.import.un_family) { | |
d62a17ae | 1141 | case AF_INET: |
1142 | pfx_un1.u.prefix4 = | |
40381db7 | 1143 | bpi1->extra->vnc.import.un.addr4; |
d62a17ae | 1144 | break; |
1145 | case AF_INET6: | |
1146 | pfx_un1.u.prefix6 = | |
40381db7 | 1147 | bpi1->extra->vnc.import.un.addr6; |
d62a17ae | 1148 | break; |
1149 | default: | |
c7ca5ccf | 1150 | pfx_un1.family = AF_UNSPEC; |
d62a17ae | 1151 | break; |
1152 | } | |
1153 | } | |
1154 | } | |
1155 | ||
40381db7 DS |
1156 | if (rfapiGetVncTunnelUnAddr(bpi2->attr, &pfx_un2)) { |
1157 | if (bpi2->extra) { | |
1158 | pfx_un2.family = bpi2->extra->vnc.import.un_family; | |
1159 | switch (bpi2->extra->vnc.import.un_family) { | |
d62a17ae | 1160 | case AF_INET: |
1161 | pfx_un2.u.prefix4 = | |
40381db7 | 1162 | bpi2->extra->vnc.import.un.addr4; |
d62a17ae | 1163 | break; |
1164 | case AF_INET6: | |
1165 | pfx_un2.u.prefix6 = | |
40381db7 | 1166 | bpi2->extra->vnc.import.un.addr6; |
d62a17ae | 1167 | break; |
1168 | default: | |
c7ca5ccf | 1169 | pfx_un2.family = AF_UNSPEC; |
d62a17ae | 1170 | break; |
1171 | } | |
1172 | } | |
1173 | } | |
1174 | ||
c7ca5ccf | 1175 | if (pfx_un1.family == AF_UNSPEC || pfx_un2.family == AF_UNSPEC) |
d62a17ae | 1176 | return 0; |
1177 | ||
1178 | if (pfx_un1.family != pfx_un2.family) | |
1179 | return 0; | |
1180 | ||
1181 | switch (pfx_un1.family) { | |
1182 | case AF_INET: | |
996c9314 | 1183 | if (!IPV4_ADDR_SAME(&pfx_un1.u.prefix4, &pfx_un2.u.prefix4)) |
d62a17ae | 1184 | return 0; |
1185 | break; | |
1186 | case AF_INET6: | |
1187 | if (!IPV6_ADDR_SAME(&pfx_un1.u.prefix6, &pfx_un2.u.prefix6)) | |
1188 | return 0; | |
1189 | break; | |
1190 | } | |
1191 | ||
1192 | ||
1193 | return 1; | |
65efcfce LB |
1194 | } |
1195 | ||
d62a17ae | 1196 | uint8_t rfapiRfpCost(struct attr *attr) |
65efcfce | 1197 | { |
d62a17ae | 1198 | if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF)) { |
1199 | if (attr->local_pref > 255) { | |
1200 | return 0; | |
1201 | } | |
1202 | return 255 - attr->local_pref; | |
1203 | } | |
1204 | ||
1205 | return 255; | |
65efcfce LB |
1206 | } |
1207 | ||
1208 | /*------------------------------------------ | |
1209 | * rfapi_extract_l2o | |
1210 | * | |
d62a17ae | 1211 | * Find Layer 2 options in an option chain |
65efcfce | 1212 | * |
d62a17ae | 1213 | * input: |
65efcfce LB |
1214 | * pHop option chain |
1215 | * | |
1216 | * output: | |
1217 | * l2o layer 2 options extracted | |
1218 | * | |
1219 | * return value: | |
1220 | * 0 OK | |
1221 | * 1 no options found | |
1222 | * | |
1223 | --------------------------------------------*/ | |
d62a17ae | 1224 | int rfapi_extract_l2o( |
1225 | struct bgp_tea_options *pHop, /* chain of options */ | |
1226 | struct rfapi_l2address_option *l2o) /* return extracted value */ | |
65efcfce | 1227 | { |
d62a17ae | 1228 | struct bgp_tea_options *p; |
65efcfce | 1229 | |
d62a17ae | 1230 | for (p = pHop; p; p = p->next) { |
1231 | if ((p->type == RFAPI_VN_OPTION_TYPE_L2ADDR) | |
1232 | && (p->length >= 8)) { | |
65efcfce | 1233 | |
d62a17ae | 1234 | char *v = p->value; |
65efcfce | 1235 | |
d62a17ae | 1236 | memcpy(&l2o->macaddr, v, 6); |
65efcfce | 1237 | |
d62a17ae | 1238 | l2o->label = ((v[6] << 12) & 0xff000) |
1239 | + ((v[7] << 4) & 0xff0) | |
1240 | + ((v[8] >> 4) & 0xf); | |
65efcfce | 1241 | |
d62a17ae | 1242 | l2o->local_nve_id = (uint8_t)v[10]; |
65efcfce | 1243 | |
d62a17ae | 1244 | l2o->logical_net_id = |
1245 | (v[11] << 16) + (v[12] << 8) + (v[13] << 0); | |
65efcfce | 1246 | |
d62a17ae | 1247 | return 0; |
1248 | } | |
1249 | } | |
1250 | return 1; | |
65efcfce LB |
1251 | } |
1252 | ||
1253 | static struct rfapi_next_hop_entry * | |
d62a17ae | 1254 | rfapiRouteInfo2NextHopEntry(struct rfapi_ip_prefix *rprefix, |
40381db7 DS |
1255 | struct bgp_path_info *bpi, /* route to encode */ |
1256 | uint32_t lifetime, /* use this in nhe */ | |
1257 | struct agg_node *rn) /* req for L2 eth addr */ | |
65efcfce | 1258 | { |
d62a17ae | 1259 | struct rfapi_next_hop_entry *new; |
1260 | int have_vnc_tunnel_un = 0; | |
26a3ffd6 | 1261 | const struct prefix *p = agg_node_get_prefix(rn); |
65efcfce | 1262 | |
1e20238a | 1263 | #ifdef DEBUG_ENCAP_MONITOR |
40381db7 | 1264 | vnc_zlog_debug_verbose("%s: entry, bpi %p, rn %p", __func__, bpi, rn); |
65efcfce LB |
1265 | #endif |
1266 | ||
d62a17ae | 1267 | new = XCALLOC(MTYPE_RFAPI_NEXTHOP, sizeof(struct rfapi_next_hop_entry)); |
d62a17ae | 1268 | |
1269 | new->prefix = *rprefix; | |
1270 | ||
40381db7 DS |
1271 | if (bpi->extra |
1272 | && decode_rd_type(bpi->extra->vnc.import.rd.val) | |
d62a17ae | 1273 | == RD_TYPE_VNC_ETH) { |
1274 | /* ethernet */ | |
1275 | ||
1276 | struct rfapi_vn_option *vo; | |
1277 | ||
1278 | vo = XCALLOC(MTYPE_RFAPI_VN_OPTION, | |
1279 | sizeof(struct rfapi_vn_option)); | |
d62a17ae | 1280 | |
1281 | vo->type = RFAPI_VN_OPTION_TYPE_L2ADDR; | |
1282 | ||
26a3ffd6 | 1283 | memcpy(&vo->v.l2addr.macaddr, &p->u.prefix_eth.octet, ETH_ALEN); |
d62a17ae | 1284 | /* only low 3 bytes of this are significant */ |
b53e67a3 | 1285 | (void)rfapiEcommunityGetLNI(bgp_attr_get_ecommunity(bpi->attr), |
05864da7 | 1286 | &vo->v.l2addr.logical_net_id); |
b53e67a3 DA |
1287 | (void)rfapiEcommunityGetEthernetTag( |
1288 | bgp_attr_get_ecommunity(bpi->attr), | |
1289 | &vo->v.l2addr.tag_id); | |
d62a17ae | 1290 | |
1291 | /* local_nve_id comes from lower byte of RD type */ | |
40381db7 | 1292 | vo->v.l2addr.local_nve_id = bpi->extra->vnc.import.rd.val[1]; |
d62a17ae | 1293 | |
1294 | /* label comes from MP_REACH_NLRI label */ | |
40381db7 | 1295 | vo->v.l2addr.label = decode_label(&bpi->extra->label[0]); |
d62a17ae | 1296 | |
1297 | new->vn_options = vo; | |
1298 | ||
1299 | /* | |
1300 | * If there is an auxiliary prefix (i.e., host IP address), | |
1301 | * use it as the nexthop prefix instead of the query prefix | |
1302 | */ | |
40381db7 DS |
1303 | if (bpi->extra->vnc.import.aux_prefix.family) { |
1304 | rfapiQprefix2Rprefix(&bpi->extra->vnc.import.aux_prefix, | |
d62a17ae | 1305 | &new->prefix); |
1306 | } | |
1307 | } | |
1308 | ||
05864da7 DS |
1309 | bgp_encap_types tun_type = BGP_ENCAP_TYPE_MPLS; /*Default*/ |
1310 | new->prefix.cost = rfapiRfpCost(bpi->attr); | |
d62a17ae | 1311 | |
05864da7 | 1312 | struct bgp_attr_encap_subtlv *pEncap; |
d62a17ae | 1313 | |
05864da7 DS |
1314 | switch (BGP_MP_NEXTHOP_FAMILY(bpi->attr->mp_nexthop_len)) { |
1315 | case AF_INET: | |
1316 | new->vn_address.addr_family = AF_INET; | |
1317 | new->vn_address.addr.v4 = bpi->attr->mp_nexthop_global_in; | |
1318 | break; | |
d62a17ae | 1319 | |
05864da7 DS |
1320 | case AF_INET6: |
1321 | new->vn_address.addr_family = AF_INET6; | |
1322 | new->vn_address.addr.v6 = bpi->attr->mp_nexthop_global; | |
1323 | break; | |
d62a17ae | 1324 | |
05864da7 DS |
1325 | default: |
1326 | zlog_warn("%s: invalid vpn nexthop length: %d", __func__, | |
1327 | bpi->attr->mp_nexthop_len); | |
1328 | rfapi_free_next_hop_list(new); | |
1329 | return NULL; | |
1330 | } | |
d62a17ae | 1331 | |
91ebf12c DS |
1332 | for (pEncap = bgp_attr_get_vnc_subtlvs(bpi->attr); pEncap; |
1333 | pEncap = pEncap->next) { | |
05864da7 DS |
1334 | switch (pEncap->type) { |
1335 | case BGP_VNC_SUBTLV_TYPE_LIFETIME: | |
1336 | /* use configured lifetime, not attr lifetime */ | |
1337 | break; | |
d62a17ae | 1338 | |
05864da7 DS |
1339 | default: |
1340 | zlog_warn("%s: unknown VNC option type %d", __func__, | |
1341 | pEncap->type); | |
d62a17ae | 1342 | |
05864da7 | 1343 | break; |
d62a17ae | 1344 | } |
05864da7 | 1345 | } |
d62a17ae | 1346 | |
05864da7 DS |
1347 | bgp_attr_extcom_tunnel_type(bpi->attr, &tun_type); |
1348 | if (tun_type == BGP_ENCAP_TYPE_MPLS) { | |
1349 | struct prefix p; | |
1350 | /* MPLS carries UN address in next hop */ | |
1351 | rfapiNexthop2Prefix(bpi->attr, &p); | |
c7ca5ccf | 1352 | if (p.family != AF_UNSPEC) { |
05864da7 DS |
1353 | rfapiQprefix2Raddr(&p, &new->un_address); |
1354 | have_vnc_tunnel_un = 1; | |
d62a17ae | 1355 | } |
05864da7 | 1356 | } |
d62a17ae | 1357 | |
05864da7 DS |
1358 | for (pEncap = bpi->attr->encap_subtlvs; pEncap; pEncap = pEncap->next) { |
1359 | switch (pEncap->type) { | |
1360 | case BGP_ENCAP_SUBTLV_TYPE_REMOTE_ENDPOINT: | |
1361 | /* | |
1362 | * Overrides ENCAP UN address, if any | |
1363 | */ | |
1364 | switch (pEncap->length) { | |
d62a17ae | 1365 | |
05864da7 DS |
1366 | case 8: |
1367 | new->un_address.addr_family = AF_INET; | |
1368 | memcpy(&new->un_address.addr.v4, pEncap->value, | |
1369 | 4); | |
1370 | have_vnc_tunnel_un = 1; | |
1371 | break; | |
d62a17ae | 1372 | |
05864da7 DS |
1373 | case 20: |
1374 | new->un_address.addr_family = AF_INET6; | |
1375 | memcpy(&new->un_address.addr.v6, pEncap->value, | |
1376 | 16); | |
1377 | have_vnc_tunnel_un = 1; | |
d62a17ae | 1378 | break; |
1379 | ||
1380 | default: | |
1381 | zlog_warn( | |
05864da7 DS |
1382 | "%s: invalid tunnel subtlv UN addr length (%d) for bpi %p", |
1383 | __func__, pEncap->length, bpi); | |
d62a17ae | 1384 | } |
05864da7 DS |
1385 | break; |
1386 | ||
1387 | default: | |
1388 | zlog_warn("%s: unknown Encap Attribute option type %d", | |
1389 | __func__, pEncap->type); | |
1390 | break; | |
d62a17ae | 1391 | } |
05864da7 | 1392 | } |
d62a17ae | 1393 | |
05864da7 | 1394 | new->un_options = rfapi_encap_tlv_to_un_option(bpi->attr); |
65efcfce | 1395 | |
1e20238a | 1396 | #ifdef DEBUG_ENCAP_MONITOR |
05864da7 DS |
1397 | vnc_zlog_debug_verbose("%s: line %d: have_vnc_tunnel_un=%d", __func__, |
1398 | __LINE__, have_vnc_tunnel_un); | |
65efcfce LB |
1399 | #endif |
1400 | ||
05864da7 DS |
1401 | if (!have_vnc_tunnel_un && bpi->extra) { |
1402 | /* | |
1403 | * use cached UN address from ENCAP route | |
1404 | */ | |
1405 | new->un_address.addr_family = bpi->extra->vnc.import.un_family; | |
1406 | switch (new->un_address.addr_family) { | |
1407 | case AF_INET: | |
1408 | new->un_address.addr.v4 = | |
1409 | bpi->extra->vnc.import.un.addr4; | |
1410 | break; | |
1411 | case AF_INET6: | |
1412 | new->un_address.addr.v6 = | |
1413 | bpi->extra->vnc.import.un.addr6; | |
1414 | break; | |
1415 | default: | |
1416 | zlog_warn("%s: invalid UN addr family (%d) for bpi %p", | |
1417 | __func__, new->un_address.addr_family, bpi); | |
1418 | rfapi_free_next_hop_list(new); | |
1419 | return NULL; | |
d62a17ae | 1420 | } |
1421 | } | |
1422 | ||
1423 | new->lifetime = lifetime; | |
1424 | return new; | |
65efcfce LB |
1425 | } |
1426 | ||
fe08ba7e | 1427 | int rfapiHasNonRemovedRoutes(struct agg_node *rn) |
65efcfce | 1428 | { |
40381db7 | 1429 | struct bgp_path_info *bpi; |
65efcfce | 1430 | |
40381db7 | 1431 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 1432 | struct prefix pfx; |
65efcfce | 1433 | |
40381db7 DS |
1434 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
1435 | && (bpi->extra && !rfapiGetUnAddrOfVpnBi(bpi, &pfx))) { | |
65efcfce | 1436 | |
d62a17ae | 1437 | return 1; |
1438 | } | |
1439 | } | |
1440 | return 0; | |
65efcfce LB |
1441 | } |
1442 | ||
1e20238a | 1443 | #ifdef DEBUG_IT_NODES |
d62a17ae | 1444 | /* |
65efcfce LB |
1445 | * DEBUG FUNCTION |
1446 | */ | |
fe08ba7e | 1447 | void rfapiDumpNode(struct agg_node *rn) |
65efcfce | 1448 | { |
40381db7 | 1449 | struct bgp_path_info *bpi; |
d62a17ae | 1450 | |
1451 | vnc_zlog_debug_verbose("%s: rn=%p", __func__, rn); | |
40381db7 | 1452 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 1453 | struct prefix pfx; |
40381db7 | 1454 | int ctrc = rfapiGetUnAddrOfVpnBi(bpi, &pfx); |
d62a17ae | 1455 | int nr; |
1456 | ||
40381db7 DS |
1457 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
1458 | && (bpi->extra && !ctrc)) { | |
d62a17ae | 1459 | |
1460 | nr = 1; | |
1461 | } else { | |
1462 | nr = 0; | |
1463 | } | |
1464 | ||
1465 | vnc_zlog_debug_verbose( | |
40381db7 DS |
1466 | " bpi=%p, nr=%d, flags=0x%x, extra=%p, ctrc=%d", bpi, |
1467 | nr, bpi->flags, bpi->extra, ctrc); | |
d62a17ae | 1468 | } |
65efcfce LB |
1469 | } |
1470 | #endif | |
1471 | ||
d62a17ae | 1472 | static int rfapiNhlAddNodeRoutes( |
fe08ba7e | 1473 | struct agg_node *rn, /* in */ |
d62a17ae | 1474 | struct rfapi_ip_prefix *rprefix, /* in */ |
1475 | uint32_t lifetime, /* in */ | |
1476 | int removed, /* in */ | |
1477 | struct rfapi_next_hop_entry **head, /* in/out */ | |
1478 | struct rfapi_next_hop_entry **tail, /* in/out */ | |
1479 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
fe08ba7e | 1480 | struct agg_node *rfd_rib_node, /* preload this NVE rib node */ |
d62a17ae | 1481 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1482 | { |
40381db7 | 1483 | struct bgp_path_info *bpi; |
d62a17ae | 1484 | struct rfapi_next_hop_entry *new; |
1485 | struct prefix pfx_un; | |
1486 | struct skiplist *seen_nexthops; | |
1487 | int count = 0; | |
26a3ffd6 DS |
1488 | const struct prefix *p = agg_node_get_prefix(rn); |
1489 | int is_l2 = (p->family == AF_ETHERNET); | |
d62a17ae | 1490 | |
fe08ba7e DS |
1491 | if (rfd_rib_node) { |
1492 | struct agg_table *atable = agg_get_table(rfd_rib_node); | |
84cc1207 PZ |
1493 | struct rfapi_descriptor *rfd; |
1494 | ||
fe08ba7e DS |
1495 | if (atable) { |
1496 | rfd = agg_get_table_info(atable); | |
84cc1207 | 1497 | |
fe08ba7e DS |
1498 | if (rfapiRibFTDFilterRecentPrefix(rfd, rn, |
1499 | pfx_target_original)) | |
1500 | return 0; | |
1501 | } | |
d62a17ae | 1502 | } |
1503 | ||
1504 | seen_nexthops = | |
63265b5c | 1505 | skiplist_new(0, vnc_prefix_cmp, prefix_free_lists); |
d62a17ae | 1506 | |
40381db7 | 1507 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 1508 | |
1509 | struct prefix pfx_vn; | |
1510 | struct prefix *newpfx; | |
1511 | ||
40381db7 | 1512 | if (removed && !CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
1e20238a | 1513 | #ifdef DEBUG_RETURNED_NHL |
d62a17ae | 1514 | vnc_zlog_debug_verbose( |
1515 | "%s: want holddown, this route not holddown, skip", | |
1516 | __func__); | |
65efcfce | 1517 | #endif |
d62a17ae | 1518 | continue; |
1519 | } | |
40381db7 | 1520 | if (!removed && CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
d62a17ae | 1521 | continue; |
1522 | } | |
1523 | ||
40381db7 | 1524 | if (!bpi->extra) { |
d62a17ae | 1525 | continue; |
1526 | } | |
1527 | ||
1528 | /* | |
1529 | * Check for excluded VN address | |
1530 | */ | |
40381db7 | 1531 | if (rfapiVpnBiNhEqualsPt(bpi, exclude_vnaddr)) |
d62a17ae | 1532 | continue; |
1533 | ||
1534 | /* | |
1535 | * Check for VN address (nexthop) copied already | |
1536 | */ | |
1537 | if (is_l2) { | |
1538 | /* L2 routes: semantic nexthop in aux_prefix; VN addr | |
1539 | * ain't it */ | |
40381db7 | 1540 | pfx_vn = bpi->extra->vnc.import.aux_prefix; |
d62a17ae | 1541 | } else { |
40381db7 | 1542 | rfapiNexthop2Prefix(bpi->attr, &pfx_vn); |
d62a17ae | 1543 | } |
1544 | if (!skiplist_search(seen_nexthops, &pfx_vn, NULL)) { | |
1e20238a | 1545 | #ifdef DEBUG_RETURNED_NHL |
d62a17ae | 1546 | vnc_zlog_debug_verbose( |
2dbe669b DA |
1547 | "%s: already put VN/nexthop %pFX, skip", |
1548 | __func__, &pfx_vn); | |
65efcfce | 1549 | #endif |
d62a17ae | 1550 | continue; |
1551 | } | |
65efcfce | 1552 | |
40381db7 | 1553 | if (rfapiGetUnAddrOfVpnBi(bpi, &pfx_un)) { |
1e20238a | 1554 | #ifdef DEBUG_ENCAP_MONITOR |
d62a17ae | 1555 | vnc_zlog_debug_verbose( |
40381db7 | 1556 | "%s: failed to get UN address of this VPN bpi", |
d62a17ae | 1557 | __func__); |
65efcfce | 1558 | #endif |
d62a17ae | 1559 | continue; |
1560 | } | |
1561 | ||
1562 | newpfx = prefix_new(); | |
1563 | *newpfx = pfx_vn; | |
1564 | skiplist_insert(seen_nexthops, newpfx, newpfx); | |
1565 | ||
40381db7 | 1566 | new = rfapiRouteInfo2NextHopEntry(rprefix, bpi, lifetime, rn); |
d62a17ae | 1567 | if (new) { |
1568 | if (rfapiRibPreloadBi(rfd_rib_node, &pfx_vn, &pfx_un, | |
40381db7 | 1569 | lifetime, bpi)) { |
d62a17ae | 1570 | /* duplicate filtered by RIB */ |
1571 | rfapi_free_next_hop_list(new); | |
1572 | new = NULL; | |
1573 | } | |
1574 | } | |
1575 | ||
1576 | if (new) { | |
1577 | if (*tail) { | |
1578 | (*tail)->next = new; | |
1579 | } else { | |
1580 | *head = new; | |
1581 | } | |
1582 | *tail = new; | |
1583 | ++count; | |
1584 | } | |
1585 | } | |
1586 | ||
1587 | skiplist_free(seen_nexthops); | |
1588 | ||
1589 | return count; | |
65efcfce LB |
1590 | } |
1591 | ||
1592 | ||
1593 | /* | |
1594 | * Breadth-first | |
1595 | * | |
1596 | * omit_node is meant for the situation where we are adding a subtree | |
1597 | * of a parent of some original requested node. The response already | |
1598 | * contains the original requested node, and we don't want to duplicate | |
1599 | * its routes in the list, so we skip it if the right or left node | |
1600 | * matches (of course, we still travel down its child subtrees). | |
1601 | */ | |
d62a17ae | 1602 | static int rfapiNhlAddSubtree( |
fe08ba7e | 1603 | struct agg_node *rn, /* in */ |
d62a17ae | 1604 | uint32_t lifetime, /* in */ |
1605 | struct rfapi_next_hop_entry **head, /* in/out */ | |
1606 | struct rfapi_next_hop_entry **tail, /* in/out */ | |
fe08ba7e | 1607 | struct agg_node *omit_node, /* in */ |
d62a17ae | 1608 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ |
fe08ba7e | 1609 | struct agg_table *rfd_rib_table, /* preload here */ |
d62a17ae | 1610 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1611 | { |
d62a17ae | 1612 | struct rfapi_ip_prefix rprefix; |
1613 | int rcount = 0; | |
1614 | ||
1615 | /* FIXME: need to find a better way here to work without sticking our | |
1616 | * hands in node->link */ | |
fe08ba7e DS |
1617 | if (agg_node_left(rn) && agg_node_left(rn) != omit_node) { |
1618 | if (agg_node_left(rn)->info) { | |
26a3ffd6 DS |
1619 | const struct prefix *p = |
1620 | agg_node_get_prefix(agg_node_left(rn)); | |
d62a17ae | 1621 | int count = 0; |
fe08ba7e | 1622 | struct agg_node *rib_rn = NULL; |
d62a17ae | 1623 | |
26a3ffd6 DS |
1624 | rfapiQprefix2Rprefix(p, &rprefix); |
1625 | if (rfd_rib_table) | |
1626 | rib_rn = agg_node_get(rfd_rib_table, p); | |
d62a17ae | 1627 | |
1628 | count = rfapiNhlAddNodeRoutes( | |
fe08ba7e DS |
1629 | agg_node_left(rn), &rprefix, lifetime, 0, head, |
1630 | tail, exclude_vnaddr, rib_rn, | |
1631 | pfx_target_original); | |
d62a17ae | 1632 | if (!count) { |
1633 | count = rfapiNhlAddNodeRoutes( | |
fe08ba7e DS |
1634 | agg_node_left(rn), &rprefix, lifetime, |
1635 | 1, head, tail, exclude_vnaddr, rib_rn, | |
d62a17ae | 1636 | pfx_target_original); |
1637 | } | |
1638 | rcount += count; | |
1639 | if (rib_rn) | |
fe08ba7e | 1640 | agg_unlock_node(rib_rn); |
d62a17ae | 1641 | } |
1642 | } | |
1643 | ||
fe08ba7e DS |
1644 | if (agg_node_right(rn) && agg_node_right(rn) != omit_node) { |
1645 | if (agg_node_right(rn)->info) { | |
26a3ffd6 DS |
1646 | const struct prefix *p = |
1647 | agg_node_get_prefix(agg_node_right(rn)); | |
d62a17ae | 1648 | int count = 0; |
fe08ba7e | 1649 | struct agg_node *rib_rn = NULL; |
d62a17ae | 1650 | |
26a3ffd6 DS |
1651 | rfapiQprefix2Rprefix(p, &rprefix); |
1652 | if (rfd_rib_table) | |
1653 | rib_rn = agg_node_get(rfd_rib_table, p); | |
1654 | ||
d62a17ae | 1655 | count = rfapiNhlAddNodeRoutes( |
fe08ba7e DS |
1656 | agg_node_right(rn), &rprefix, lifetime, 0, head, |
1657 | tail, exclude_vnaddr, rib_rn, | |
1658 | pfx_target_original); | |
d62a17ae | 1659 | if (!count) { |
1660 | count = rfapiNhlAddNodeRoutes( | |
fe08ba7e DS |
1661 | agg_node_right(rn), &rprefix, lifetime, |
1662 | 1, head, tail, exclude_vnaddr, rib_rn, | |
d62a17ae | 1663 | pfx_target_original); |
1664 | } | |
1665 | rcount += count; | |
1666 | if (rib_rn) | |
fe08ba7e | 1667 | agg_unlock_node(rib_rn); |
d62a17ae | 1668 | } |
1669 | } | |
1670 | ||
fe08ba7e | 1671 | if (agg_node_left(rn)) { |
d62a17ae | 1672 | rcount += rfapiNhlAddSubtree( |
fe08ba7e | 1673 | agg_node_left(rn), lifetime, head, tail, omit_node, |
d62a17ae | 1674 | exclude_vnaddr, rfd_rib_table, pfx_target_original); |
1675 | } | |
fe08ba7e | 1676 | if (agg_node_right(rn)) { |
d62a17ae | 1677 | rcount += rfapiNhlAddSubtree( |
fe08ba7e | 1678 | agg_node_right(rn), lifetime, head, tail, omit_node, |
d62a17ae | 1679 | exclude_vnaddr, rfd_rib_table, pfx_target_original); |
1680 | } | |
1681 | ||
1682 | return rcount; | |
65efcfce LB |
1683 | } |
1684 | ||
1685 | /* | |
1686 | * Implementation of ROUTE_LIST(node) from RFAPI-Import-Event-Handling.txt | |
1687 | * | |
1688 | * Construct an rfapi nexthop list based on the routes attached to | |
1689 | * the specified node. | |
1690 | * | |
1defdda8 DS |
1691 | * If there are any routes that do NOT have BGP_PATH_REMOVED set, |
1692 | * return those only. If there are ONLY routes with BGP_PATH_REMOVED, | |
65efcfce LB |
1693 | * then return those, and also include all the non-removed routes from the |
1694 | * next less-specific node (i.e., this node's parent) at the end. | |
1695 | */ | |
d62a17ae | 1696 | struct rfapi_next_hop_entry *rfapiRouteNode2NextHopList( |
fe08ba7e DS |
1697 | struct agg_node *rn, uint32_t lifetime, /* put into nexthop entries */ |
1698 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
1699 | struct agg_table *rfd_rib_table, /* preload here */ | |
1700 | struct prefix *pfx_target_original) /* query target */ | |
65efcfce | 1701 | { |
d62a17ae | 1702 | struct rfapi_ip_prefix rprefix; |
1703 | struct rfapi_next_hop_entry *answer = NULL; | |
1704 | struct rfapi_next_hop_entry *last = NULL; | |
fe08ba7e | 1705 | struct agg_node *parent; |
26a3ffd6 | 1706 | const struct prefix *p = agg_node_get_prefix(rn); |
d62a17ae | 1707 | int count = 0; |
fe08ba7e | 1708 | struct agg_node *rib_rn; |
65efcfce | 1709 | |
1e20238a | 1710 | #ifdef DEBUG_RETURNED_NHL |
26a3ffd6 | 1711 | vnc_zlog_debug_verbose("%s: called with node pfx=%rRN", __func__, rn); |
d62a17ae | 1712 | rfapiDebugBacktrace(); |
65efcfce LB |
1713 | #endif |
1714 | ||
26a3ffd6 | 1715 | rfapiQprefix2Rprefix(p, &rprefix); |
d62a17ae | 1716 | |
26a3ffd6 | 1717 | rib_rn = rfd_rib_table ? agg_node_get(rfd_rib_table, p) : NULL; |
d62a17ae | 1718 | |
1719 | /* | |
1720 | * Add non-withdrawn routes at this node | |
1721 | */ | |
1722 | count = rfapiNhlAddNodeRoutes(rn, &rprefix, lifetime, 0, &answer, &last, | |
1723 | exclude_vnaddr, rib_rn, | |
1724 | pfx_target_original); | |
1725 | ||
1726 | /* | |
1727 | * If the list has at least one entry, it's finished | |
1728 | */ | |
1729 | if (count) { | |
1730 | count += rfapiNhlAddSubtree(rn, lifetime, &answer, &last, NULL, | |
1731 | exclude_vnaddr, rfd_rib_table, | |
1732 | pfx_target_original); | |
1733 | vnc_zlog_debug_verbose("%s: %d nexthops, answer=%p", __func__, | |
1734 | count, answer); | |
1e20238a | 1735 | #ifdef DEBUG_RETURNED_NHL |
d62a17ae | 1736 | rfapiPrintNhl(NULL, answer); |
65efcfce | 1737 | #endif |
d62a17ae | 1738 | if (rib_rn) |
fe08ba7e | 1739 | agg_unlock_node(rib_rn); |
d62a17ae | 1740 | return answer; |
1741 | } | |
1742 | ||
1743 | /* | |
1744 | * Add withdrawn routes at this node | |
1745 | */ | |
1746 | count = rfapiNhlAddNodeRoutes(rn, &rprefix, lifetime, 1, &answer, &last, | |
1747 | exclude_vnaddr, rib_rn, | |
1748 | pfx_target_original); | |
1749 | if (rib_rn) | |
fe08ba7e | 1750 | agg_unlock_node(rib_rn); |
d62a17ae | 1751 | |
1752 | // rfapiPrintNhl(NULL, answer); | |
1753 | ||
1754 | /* | |
1755 | * walk up the tree until we find a node with non-deleted | |
1756 | * routes, then add them | |
1757 | */ | |
fe08ba7e DS |
1758 | for (parent = agg_node_parent(rn); parent; |
1759 | parent = agg_node_parent(parent)) { | |
d62a17ae | 1760 | if (rfapiHasNonRemovedRoutes(parent)) { |
1761 | break; | |
1762 | } | |
1763 | } | |
1764 | ||
1765 | /* | |
1766 | * Add non-withdrawn routes from less-specific prefix | |
1767 | */ | |
1768 | if (parent) { | |
26a3ffd6 DS |
1769 | const struct prefix *p = agg_node_get_prefix(parent); |
1770 | ||
1771 | rib_rn = rfd_rib_table ? agg_node_get(rfd_rib_table, p) : NULL; | |
1772 | rfapiQprefix2Rprefix(p, &rprefix); | |
d62a17ae | 1773 | count += rfapiNhlAddNodeRoutes(parent, &rprefix, lifetime, 0, |
1774 | &answer, &last, exclude_vnaddr, | |
1775 | rib_rn, pfx_target_original); | |
1776 | count += rfapiNhlAddSubtree(parent, lifetime, &answer, &last, | |
1777 | rn, exclude_vnaddr, rfd_rib_table, | |
1778 | pfx_target_original); | |
1779 | if (rib_rn) | |
fe08ba7e | 1780 | agg_unlock_node(rib_rn); |
d62a17ae | 1781 | } else { |
1782 | /* | |
1783 | * There is no parent with non-removed routes. Still need to | |
1784 | * add subtree of original node if it contributed routes to the | |
1785 | * answer. | |
1786 | */ | |
1787 | if (count) | |
1788 | count += rfapiNhlAddSubtree(rn, lifetime, &answer, | |
1789 | &last, rn, exclude_vnaddr, | |
1790 | rfd_rib_table, | |
1791 | pfx_target_original); | |
1792 | } | |
1793 | ||
1794 | vnc_zlog_debug_verbose("%s: %d nexthops, answer=%p", __func__, count, | |
1795 | answer); | |
1e20238a | 1796 | #ifdef DEBUG_RETURNED_NHL |
d62a17ae | 1797 | rfapiPrintNhl(NULL, answer); |
65efcfce | 1798 | #endif |
d62a17ae | 1799 | return answer; |
65efcfce LB |
1800 | } |
1801 | ||
1802 | /* | |
1803 | * Construct nexthop list of all routes in table | |
1804 | */ | |
d62a17ae | 1805 | struct rfapi_next_hop_entry *rfapiRouteTable2NextHopList( |
fe08ba7e DS |
1806 | struct agg_table *rt, uint32_t lifetime, /* put into nexthop entries */ |
1807 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
1808 | struct agg_table *rfd_rib_table, /* preload this NVE rib table */ | |
1809 | struct prefix *pfx_target_original) /* query target */ | |
65efcfce | 1810 | { |
fe08ba7e | 1811 | struct agg_node *rn; |
d62a17ae | 1812 | struct rfapi_next_hop_entry *biglist = NULL; |
1813 | struct rfapi_next_hop_entry *nhl; | |
1814 | struct rfapi_next_hop_entry *tail = NULL; | |
1815 | int count = 0; | |
1816 | ||
fe08ba7e | 1817 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
d62a17ae | 1818 | |
1819 | nhl = rfapiRouteNode2NextHopList(rn, lifetime, exclude_vnaddr, | |
1820 | rfd_rib_table, | |
1821 | pfx_target_original); | |
1822 | if (!tail) { | |
1823 | tail = biglist = nhl; | |
1824 | if (tail) | |
1825 | count = 1; | |
1826 | } else { | |
1827 | tail->next = nhl; | |
1828 | } | |
1829 | if (tail) { | |
1830 | while (tail->next) { | |
1831 | ++count; | |
1832 | tail = tail->next; | |
1833 | } | |
1834 | } | |
1835 | } | |
1836 | ||
1837 | vnc_zlog_debug_verbose("%s: returning %d routes", __func__, count); | |
1838 | return biglist; | |
65efcfce LB |
1839 | } |
1840 | ||
d62a17ae | 1841 | struct rfapi_next_hop_entry *rfapiEthRouteNode2NextHopList( |
fe08ba7e | 1842 | struct agg_node *rn, struct rfapi_ip_prefix *rprefix, |
d62a17ae | 1843 | uint32_t lifetime, /* put into nexthop entries */ |
1844 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
fe08ba7e | 1845 | struct agg_table *rfd_rib_table, /* preload NVE rib table */ |
d62a17ae | 1846 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1847 | { |
d62a17ae | 1848 | int count = 0; |
1849 | struct rfapi_next_hop_entry *answer = NULL; | |
1850 | struct rfapi_next_hop_entry *last = NULL; | |
fe08ba7e | 1851 | struct agg_node *rib_rn; |
65efcfce | 1852 | |
26a3ffd6 DS |
1853 | rib_rn = rfd_rib_table |
1854 | ? agg_node_get(rfd_rib_table, agg_node_get_prefix(rn)) | |
1855 | : NULL; | |
65efcfce | 1856 | |
d62a17ae | 1857 | count = rfapiNhlAddNodeRoutes(rn, rprefix, lifetime, 0, &answer, &last, |
1858 | NULL, rib_rn, pfx_target_original); | |
65efcfce | 1859 | |
1e20238a | 1860 | #ifdef DEBUG_ENCAP_MONITOR |
d62a17ae | 1861 | vnc_zlog_debug_verbose("%s: node %p: %d non-holddown routes", __func__, |
1862 | rn, count); | |
65efcfce LB |
1863 | #endif |
1864 | ||
d62a17ae | 1865 | if (!count) { |
1866 | count = rfapiNhlAddNodeRoutes(rn, rprefix, lifetime, 1, &answer, | |
1867 | &last, exclude_vnaddr, rib_rn, | |
1868 | pfx_target_original); | |
1869 | vnc_zlog_debug_verbose("%s: node %p: %d holddown routes", | |
1870 | __func__, rn, count); | |
1871 | } | |
65efcfce | 1872 | |
d62a17ae | 1873 | if (rib_rn) |
fe08ba7e | 1874 | agg_unlock_node(rib_rn); |
65efcfce | 1875 | |
1e20238a | 1876 | #ifdef DEBUG_RETURNED_NHL |
d62a17ae | 1877 | rfapiPrintNhl(NULL, answer); |
65efcfce LB |
1878 | #endif |
1879 | ||
d62a17ae | 1880 | return answer; |
65efcfce LB |
1881 | } |
1882 | ||
1883 | ||
1884 | /* | |
1885 | * Construct nexthop list of all routes in table | |
1886 | */ | |
d62a17ae | 1887 | struct rfapi_next_hop_entry *rfapiEthRouteTable2NextHopList( |
1888 | uint32_t logical_net_id, struct rfapi_ip_prefix *rprefix, | |
1889 | uint32_t lifetime, /* put into nexthop entries */ | |
1890 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
fe08ba7e | 1891 | struct agg_table *rfd_rib_table, /* preload NVE rib node */ |
d62a17ae | 1892 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1893 | { |
d62a17ae | 1894 | struct rfapi_import_table *it; |
1895 | struct bgp *bgp = bgp_get_default(); | |
fe08ba7e DS |
1896 | struct agg_table *rt; |
1897 | struct agg_node *rn; | |
d62a17ae | 1898 | struct rfapi_next_hop_entry *biglist = NULL; |
1899 | struct rfapi_next_hop_entry *nhl; | |
1900 | struct rfapi_next_hop_entry *tail = NULL; | |
1901 | int count = 0; | |
1902 | ||
1903 | ||
1904 | it = rfapiMacImportTableGet(bgp, logical_net_id); | |
1905 | rt = it->imported_vpn[AFI_L2VPN]; | |
1906 | ||
fe08ba7e | 1907 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
d62a17ae | 1908 | |
1909 | nhl = rfapiEthRouteNode2NextHopList( | |
1910 | rn, rprefix, lifetime, exclude_vnaddr, rfd_rib_table, | |
1911 | pfx_target_original); | |
1912 | if (!tail) { | |
1913 | tail = biglist = nhl; | |
1914 | if (tail) | |
1915 | count = 1; | |
1916 | } else { | |
1917 | tail->next = nhl; | |
1918 | } | |
1919 | if (tail) { | |
1920 | while (tail->next) { | |
1921 | ++count; | |
1922 | tail = tail->next; | |
1923 | } | |
1924 | } | |
1925 | } | |
1926 | ||
1927 | vnc_zlog_debug_verbose("%s: returning %d routes", __func__, count); | |
1928 | return biglist; | |
65efcfce LB |
1929 | } |
1930 | ||
1931 | /* | |
40381db7 DS |
1932 | * Insert a new bpi to the imported route table node, |
1933 | * keeping the list of BPIs sorted best route first | |
65efcfce | 1934 | */ |
fe08ba7e | 1935 | static void rfapiBgpInfoAttachSorted(struct agg_node *rn, |
4b7e6066 | 1936 | struct bgp_path_info *info_new, afi_t afi, |
d62a17ae | 1937 | safi_t safi) |
65efcfce | 1938 | { |
d62a17ae | 1939 | struct bgp *bgp; |
4b7e6066 DS |
1940 | struct bgp_path_info *prev; |
1941 | struct bgp_path_info *next; | |
d62a17ae | 1942 | char pfx_buf[PREFIX2STR_BUFFER]; |
1943 | ||
1944 | ||
1945 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
1946 | ||
1947 | if (VNC_DEBUG(IMPORT_BI_ATTACH)) { | |
1948 | vnc_zlog_debug_verbose("%s: info_new->peer=%p", __func__, | |
1949 | info_new->peer); | |
1950 | vnc_zlog_debug_verbose("%s: info_new->peer->su_remote=%p", | |
1951 | __func__, info_new->peer->su_remote); | |
1952 | } | |
1953 | ||
1954 | for (prev = NULL, next = rn->info; next; | |
1955 | prev = next, next = next->next) { | |
fdf81fa0 DS |
1956 | enum bgp_path_selection_reason reason; |
1957 | ||
1defdda8 DS |
1958 | if (!bgp |
1959 | || (!CHECK_FLAG(info_new->flags, BGP_PATH_REMOVED) | |
1960 | && CHECK_FLAG(next->flags, BGP_PATH_REMOVED)) | |
18ee8310 | 1961 | || bgp_path_info_cmp_compatible(bgp, info_new, next, |
fdf81fa0 DS |
1962 | pfx_buf, afi, safi, |
1963 | &reason) | |
d62a17ae | 1964 | == -1) { /* -1 if 1st is better */ |
1965 | break; | |
1966 | } | |
1967 | } | |
1968 | vnc_zlog_debug_verbose("%s: prev=%p, next=%p", __func__, prev, next); | |
1969 | if (prev) { | |
1970 | prev->next = info_new; | |
1971 | } else { | |
1972 | rn->info = info_new; | |
1973 | } | |
1974 | info_new->prev = prev; | |
1975 | info_new->next = next; | |
1976 | if (next) | |
1977 | next->prev = info_new; | |
1978 | bgp_attr_intern(info_new->attr); | |
65efcfce LB |
1979 | } |
1980 | ||
40381db7 | 1981 | static void rfapiBgpInfoDetach(struct agg_node *rn, struct bgp_path_info *bpi) |
65efcfce | 1982 | { |
d62a17ae | 1983 | /* |
1984 | * Remove the route (doubly-linked) | |
1985 | */ | |
40381db7 DS |
1986 | // bgp_attr_unintern (&bpi->attr); |
1987 | if (bpi->next) | |
1988 | bpi->next->prev = bpi->prev; | |
1989 | if (bpi->prev) | |
1990 | bpi->prev->next = bpi->next; | |
d62a17ae | 1991 | else |
40381db7 | 1992 | rn->info = bpi->next; |
65efcfce LB |
1993 | } |
1994 | ||
1995 | /* | |
1996 | * For L3-indexed import tables | |
1997 | */ | |
1a4189d4 | 1998 | static int rfapi_bi_peer_rd_cmp(const void *b1, const void *b2) |
65efcfce | 1999 | { |
1a4189d4 DS |
2000 | const struct bgp_path_info *bpi1 = b1; |
2001 | const struct bgp_path_info *bpi2 = b2; | |
d62a17ae | 2002 | |
2003 | /* | |
2004 | * Compare peers | |
2005 | */ | |
40381db7 | 2006 | if (bpi1->peer < bpi2->peer) |
d62a17ae | 2007 | return -1; |
40381db7 | 2008 | if (bpi1->peer > bpi2->peer) |
d62a17ae | 2009 | return 1; |
2010 | ||
2011 | /* | |
2012 | * compare RDs | |
2013 | */ | |
1a4189d4 DS |
2014 | return vnc_prefix_cmp( |
2015 | (const struct prefix *)&bpi1->extra->vnc.import.rd, | |
2016 | (const struct prefix *)&bpi2->extra->vnc.import.rd); | |
65efcfce LB |
2017 | } |
2018 | ||
2019 | /* | |
2020 | * For L2-indexed import tables | |
40381db7 | 2021 | * The BPIs in these tables should ALWAYS have an aux_prefix set because |
65efcfce LB |
2022 | * they arrive via IPv4 or IPv6 advertisements. |
2023 | */ | |
1a4189d4 | 2024 | static int rfapi_bi_peer_rd_aux_cmp(const void *b1, const void *b2) |
65efcfce | 2025 | { |
1a4189d4 DS |
2026 | const struct bgp_path_info *bpi1 = b1; |
2027 | const struct bgp_path_info *bpi2 = b2; | |
d62a17ae | 2028 | int rc; |
2029 | ||
2030 | /* | |
2031 | * Compare peers | |
2032 | */ | |
40381db7 | 2033 | if (bpi1->peer < bpi2->peer) |
d62a17ae | 2034 | return -1; |
40381db7 | 2035 | if (bpi1->peer > bpi2->peer) |
d62a17ae | 2036 | return 1; |
2037 | ||
2038 | /* | |
2039 | * compare RDs | |
2040 | */ | |
40381db7 DS |
2041 | rc = vnc_prefix_cmp((struct prefix *)&bpi1->extra->vnc.import.rd, |
2042 | (struct prefix *)&bpi2->extra->vnc.import.rd); | |
d62a17ae | 2043 | if (rc) { |
2044 | return rc; | |
2045 | } | |
2046 | ||
2047 | /* | |
2048 | * L2 import tables can have multiple entries with the | |
2049 | * same MAC address, same RD, but different L3 addresses. | |
2050 | * | |
2051 | * Use presence of aux_prefix with AF=ethernet and prefixlen=1 | |
2052 | * as magic value to signify explicit wildcarding of the aux_prefix. | |
40381db7 DS |
2053 | * This magic value will not appear in bona fide bpi entries in |
2054 | * the import table, but is allowed in the "fake" bpi used to | |
d62a17ae | 2055 | * probe the table when searching. (We have to test both b1 and b2 |
2056 | * because there is no guarantee of the order the test key and | |
2057 | * the real key will be passed) | |
2058 | */ | |
40381db7 DS |
2059 | if ((bpi1->extra->vnc.import.aux_prefix.family == AF_ETHERNET |
2060 | && (bpi1->extra->vnc.import.aux_prefix.prefixlen == 1)) | |
2061 | || (bpi2->extra->vnc.import.aux_prefix.family == AF_ETHERNET | |
2062 | && (bpi2->extra->vnc.import.aux_prefix.prefixlen == 1))) { | |
d62a17ae | 2063 | |
2064 | /* | |
2065 | * wildcard aux address specified | |
2066 | */ | |
2067 | return 0; | |
2068 | } | |
2069 | ||
40381db7 DS |
2070 | return vnc_prefix_cmp(&bpi1->extra->vnc.import.aux_prefix, |
2071 | &bpi2->extra->vnc.import.aux_prefix); | |
65efcfce LB |
2072 | } |
2073 | ||
2074 | ||
2075 | /* | |
2076 | * Index on RD and Peer | |
2077 | */ | |
fe08ba7e | 2078 | static void rfapiItBiIndexAdd(struct agg_node *rn, /* Import table VPN node */ |
40381db7 | 2079 | struct bgp_path_info *bpi) /* new BPI */ |
65efcfce | 2080 | { |
d62a17ae | 2081 | struct skiplist *sl; |
26a3ffd6 | 2082 | const struct prefix *p; |
d62a17ae | 2083 | |
2084 | assert(rn); | |
40381db7 DS |
2085 | assert(bpi); |
2086 | assert(bpi->extra); | |
d62a17ae | 2087 | |
4a8cd6ad | 2088 | vnc_zlog_debug_verbose("%s: bpi %p, peer %p, rd %pRDP", __func__, bpi, |
c4f64ea9 | 2089 | bpi->peer, &bpi->extra->vnc.import.rd); |
d62a17ae | 2090 | |
2091 | sl = RFAPI_RDINDEX_W_ALLOC(rn); | |
2092 | if (!sl) { | |
26a3ffd6 DS |
2093 | p = agg_node_get_prefix(rn); |
2094 | if (AF_ETHERNET == p->family) { | |
d62a17ae | 2095 | sl = skiplist_new(0, rfapi_bi_peer_rd_aux_cmp, NULL); |
2096 | } else { | |
2097 | sl = skiplist_new(0, rfapi_bi_peer_rd_cmp, NULL); | |
2098 | } | |
2099 | RFAPI_IT_EXTRA_GET(rn)->u.vpn.idx_rd = sl; | |
fe08ba7e | 2100 | agg_lock_node(rn); /* for skiplist */ |
d62a17ae | 2101 | } |
40381db7 | 2102 | assert(!skiplist_insert(sl, (void *)bpi, (void *)bpi)); |
fe08ba7e | 2103 | agg_lock_node(rn); /* for skiplist entry */ |
d62a17ae | 2104 | |
40381db7 | 2105 | /* NB: BPIs in import tables are not refcounted */ |
65efcfce LB |
2106 | } |
2107 | ||
fe08ba7e | 2108 | static void rfapiItBiIndexDump(struct agg_node *rn) |
65efcfce | 2109 | { |
d62a17ae | 2110 | struct skiplist *sl; |
2111 | void *cursor = NULL; | |
4b7e6066 DS |
2112 | struct bgp_path_info *k; |
2113 | struct bgp_path_info *v; | |
d62a17ae | 2114 | int rc; |
2115 | ||
2116 | sl = RFAPI_RDINDEX(rn); | |
2117 | if (!sl) | |
2118 | return; | |
2119 | ||
2120 | for (rc = skiplist_next(sl, (void **)&k, (void **)&v, &cursor); !rc; | |
2121 | rc = skiplist_next(sl, (void **)&k, (void **)&v, &cursor)) { | |
2122 | ||
06b9f471 | 2123 | char buf[RD_ADDRSTRLEN]; |
872ed4c7 | 2124 | char buf_aux_pfx[PREFIX_STRLEN]; |
d62a17ae | 2125 | |
4a8cd6ad PG |
2126 | prefix_rd2str( |
2127 | &k->extra->vnc.import.rd, buf, sizeof(buf), | |
2128 | bgp_get_asnotation(k->peer ? k->peer->bgp : NULL)); | |
d62a17ae | 2129 | if (k->extra->vnc.import.aux_prefix.family) { |
2130 | prefix2str(&k->extra->vnc.import.aux_prefix, | |
06b9f471 DS |
2131 | buf_aux_pfx, sizeof(buf_aux_pfx)); |
2132 | } else | |
9825c71e | 2133 | strlcpy(buf_aux_pfx, "(none)", sizeof(buf_aux_pfx)); |
d62a17ae | 2134 | |
40381db7 | 2135 | vnc_zlog_debug_verbose("bpi %p, peer %p, rd %s, aux_prefix %s", |
d62a17ae | 2136 | k, k->peer, buf, buf_aux_pfx); |
2137 | } | |
65efcfce LB |
2138 | } |
2139 | ||
4b7e6066 | 2140 | static struct bgp_path_info *rfapiItBiIndexSearch( |
fe08ba7e | 2141 | struct agg_node *rn, /* Import table VPN node */ |
d62a17ae | 2142 | struct prefix_rd *prd, struct peer *peer, |
5a1ae2c2 | 2143 | const struct prefix *aux_prefix) /* optional L3 addr for L2 ITs */ |
65efcfce | 2144 | { |
d62a17ae | 2145 | struct skiplist *sl; |
2146 | int rc; | |
b8694ef4 DS |
2147 | struct bgp_path_info bpi_fake = {0}; |
2148 | struct bgp_path_info_extra bpi_extra = {0}; | |
40381db7 | 2149 | struct bgp_path_info *bpi_result; |
65efcfce | 2150 | |
d62a17ae | 2151 | sl = RFAPI_RDINDEX(rn); |
2152 | if (!sl) | |
2153 | return NULL; | |
65efcfce | 2154 | |
1e20238a | 2155 | #ifdef DEBUG_BI_SEARCH |
d62a17ae | 2156 | { |
872ed4c7 | 2157 | char buf_aux_pfx[PREFIX_STRLEN]; |
d62a17ae | 2158 | |
d62a17ae | 2159 | if (aux_prefix) { |
872ed4c7 DS |
2160 | prefix2str(aux_prefix, buf_aux_pfx, |
2161 | sizeof(buf_aux_pfx)); | |
06b9f471 | 2162 | } else |
9825c71e | 2163 | strlcpy(buf_aux_pfx, "(nil)", sizeof(buf_aux_pfx)); |
d62a17ae | 2164 | |
c4f64ea9 | 2165 | vnc_zlog_debug_verbose( |
4a8cd6ad | 2166 | "%s want prd=%pRDP, peer=%p, aux_prefix=%s", __func__, |
c4f64ea9 | 2167 | prd, peer, buf_aux_pfx); |
d62a17ae | 2168 | rfapiItBiIndexDump(rn); |
2169 | } | |
65efcfce LB |
2170 | #endif |
2171 | ||
d62a17ae | 2172 | /* threshold is a WAG */ |
2173 | if (sl->count < 3) { | |
1e20238a | 2174 | #ifdef DEBUG_BI_SEARCH |
d62a17ae | 2175 | vnc_zlog_debug_verbose("%s: short list algorithm", __func__); |
65efcfce | 2176 | #endif |
d62a17ae | 2177 | /* if short list, linear search might be faster */ |
40381db7 DS |
2178 | for (bpi_result = rn->info; bpi_result; |
2179 | bpi_result = bpi_result->next) { | |
1e20238a | 2180 | #ifdef DEBUG_BI_SEARCH |
c4f64ea9 | 2181 | vnc_zlog_debug_verbose( |
4a8cd6ad | 2182 | "%s: bpi has prd=%pRDP, peer=%p", __func__, |
c4f64ea9 DA |
2183 | &bpi_result->extra->vnc.import.rd, |
2184 | bpi_result->peer); | |
65efcfce | 2185 | #endif |
40381db7 DS |
2186 | if (peer == bpi_result->peer |
2187 | && !prefix_cmp((struct prefix *)&bpi_result->extra | |
d62a17ae | 2188 | ->vnc.import.rd, |
2189 | (struct prefix *)prd)) { | |
65efcfce | 2190 | |
1e20238a | 2191 | #ifdef DEBUG_BI_SEARCH |
d62a17ae | 2192 | vnc_zlog_debug_verbose( |
2193 | "%s: peer and RD same, doing aux_prefix check", | |
2194 | __func__); | |
65efcfce | 2195 | #endif |
d62a17ae | 2196 | if (!aux_prefix |
40381db7 DS |
2197 | || !prefix_cmp( |
2198 | aux_prefix, | |
2199 | &bpi_result->extra->vnc.import | |
2200 | .aux_prefix)) { | |
65efcfce | 2201 | |
1e20238a | 2202 | #ifdef DEBUG_BI_SEARCH |
d62a17ae | 2203 | vnc_zlog_debug_verbose("%s: match", |
2204 | __func__); | |
65efcfce | 2205 | #endif |
d62a17ae | 2206 | break; |
2207 | } | |
2208 | } | |
2209 | } | |
40381db7 | 2210 | return bpi_result; |
d62a17ae | 2211 | } |
2212 | ||
40381db7 DS |
2213 | bpi_fake.peer = peer; |
2214 | bpi_fake.extra = &bpi_extra; | |
c4efd0f4 | 2215 | bpi_fake.extra->vnc.import.rd = *prd; |
d62a17ae | 2216 | if (aux_prefix) { |
40381db7 | 2217 | bpi_fake.extra->vnc.import.aux_prefix = *aux_prefix; |
d62a17ae | 2218 | } else { |
2219 | /* wildcard */ | |
40381db7 DS |
2220 | bpi_fake.extra->vnc.import.aux_prefix.family = AF_ETHERNET; |
2221 | bpi_fake.extra->vnc.import.aux_prefix.prefixlen = 1; | |
d62a17ae | 2222 | } |
2223 | ||
40381db7 | 2224 | rc = skiplist_search(sl, (void *)&bpi_fake, (void *)&bpi_result); |
d62a17ae | 2225 | |
2226 | if (rc) { | |
1e20238a | 2227 | #ifdef DEBUG_BI_SEARCH |
d62a17ae | 2228 | vnc_zlog_debug_verbose("%s: no match", __func__); |
65efcfce | 2229 | #endif |
d62a17ae | 2230 | return NULL; |
2231 | } | |
65efcfce | 2232 | |
1e20238a | 2233 | #ifdef DEBUG_BI_SEARCH |
40381db7 | 2234 | vnc_zlog_debug_verbose("%s: matched bpi=%p", __func__, bpi_result); |
65efcfce LB |
2235 | #endif |
2236 | ||
40381db7 | 2237 | return bpi_result; |
65efcfce LB |
2238 | } |
2239 | ||
fe08ba7e | 2240 | static void rfapiItBiIndexDel(struct agg_node *rn, /* Import table VPN node */ |
40381db7 | 2241 | struct bgp_path_info *bpi) /* old BPI */ |
65efcfce | 2242 | { |
d62a17ae | 2243 | struct skiplist *sl; |
2244 | int rc; | |
65efcfce | 2245 | |
4a8cd6ad | 2246 | vnc_zlog_debug_verbose("%s: bpi %p, peer %p, rd %pRDP", __func__, bpi, |
c4f64ea9 | 2247 | bpi->peer, &bpi->extra->vnc.import.rd); |
65efcfce | 2248 | |
d62a17ae | 2249 | sl = RFAPI_RDINDEX(rn); |
2250 | assert(sl); | |
65efcfce | 2251 | |
40381db7 | 2252 | rc = skiplist_delete(sl, (void *)(bpi), (void *)bpi); |
d62a17ae | 2253 | if (rc) { |
2254 | rfapiItBiIndexDump(rn); | |
2255 | } | |
2256 | assert(!rc); | |
65efcfce | 2257 | |
fe08ba7e | 2258 | agg_unlock_node(rn); /* for skiplist entry */ |
65efcfce | 2259 | |
40381db7 | 2260 | /* NB: BPIs in import tables are not refcounted */ |
65efcfce LB |
2261 | } |
2262 | ||
2263 | /* | |
2264 | * Add a backreference at the ENCAP node to the VPN route that | |
2265 | * refers to it | |
2266 | */ | |
4b7e6066 DS |
2267 | static void |
2268 | rfapiMonitorEncapAdd(struct rfapi_import_table *import_table, | |
40381db7 DS |
2269 | struct prefix *p, /* VN address */ |
2270 | struct agg_node *vpn_rn, /* VPN node */ | |
2271 | struct bgp_path_info *vpn_bpi) /* VPN bpi/route */ | |
65efcfce | 2272 | { |
d62a17ae | 2273 | afi_t afi = family2afi(p->family); |
fe08ba7e | 2274 | struct agg_node *rn; |
d62a17ae | 2275 | struct rfapi_monitor_encap *m; |
2276 | ||
2277 | assert(afi); | |
fe08ba7e | 2278 | rn = agg_node_get(import_table->imported_encap[afi], p); /* locks rn */ |
d62a17ae | 2279 | assert(rn); |
2280 | ||
2281 | m = XCALLOC(MTYPE_RFAPI_MONITOR_ENCAP, | |
2282 | sizeof(struct rfapi_monitor_encap)); | |
d62a17ae | 2283 | |
2284 | m->node = vpn_rn; | |
40381db7 | 2285 | m->bpi = vpn_bpi; |
d62a17ae | 2286 | m->rn = rn; |
2287 | ||
2288 | /* insert to encap node's list */ | |
2289 | m->next = RFAPI_MONITOR_ENCAP(rn); | |
2290 | if (m->next) | |
2291 | m->next->prev = m; | |
2292 | RFAPI_MONITOR_ENCAP_W_ALLOC(rn) = m; | |
2293 | ||
2294 | /* for easy lookup when deleting vpn route */ | |
40381db7 | 2295 | vpn_bpi->extra->vnc.import.hme = m; |
d62a17ae | 2296 | |
2297 | vnc_zlog_debug_verbose( | |
40381db7 DS |
2298 | "%s: it=%p, vpn_bpi=%p, afi=%d, encap rn=%p, setting vpn_bpi->extra->vnc.import.hme=%p", |
2299 | __func__, import_table, vpn_bpi, afi, rn, m); | |
d62a17ae | 2300 | |
2301 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, 0); | |
40381db7 | 2302 | bgp_attr_intern(vpn_bpi->attr); |
65efcfce LB |
2303 | } |
2304 | ||
40381db7 | 2305 | static void rfapiMonitorEncapDelete(struct bgp_path_info *vpn_bpi) |
65efcfce | 2306 | { |
d62a17ae | 2307 | /* |
2308 | * Remove encap monitor | |
2309 | */ | |
40381db7 DS |
2310 | vnc_zlog_debug_verbose("%s: vpn_bpi=%p", __func__, vpn_bpi); |
2311 | if (vpn_bpi->extra) { | |
2312 | struct rfapi_monitor_encap *hme = | |
2313 | vpn_bpi->extra->vnc.import.hme; | |
d62a17ae | 2314 | |
2315 | if (hme) { | |
2316 | ||
2317 | vnc_zlog_debug_verbose("%s: hme=%p", __func__, hme); | |
2318 | ||
2319 | /* Refcount checking takes too long here */ | |
2320 | // RFAPI_CHECK_REFCOUNT(hme->rn, SAFI_ENCAP, 0); | |
2321 | if (hme->next) | |
2322 | hme->next->prev = hme->prev; | |
2323 | if (hme->prev) | |
2324 | hme->prev->next = hme->next; | |
2325 | else | |
2326 | RFAPI_MONITOR_ENCAP_W_ALLOC(hme->rn) = | |
2327 | hme->next; | |
2328 | /* Refcount checking takes too long here */ | |
2329 | // RFAPI_CHECK_REFCOUNT(hme->rn, SAFI_ENCAP, 1); | |
2330 | ||
2331 | /* see if the struct rfapi_it_extra is empty and can be | |
2332 | * freed */ | |
2333 | rfapiMonitorExtraPrune(SAFI_ENCAP, hme->rn); | |
2334 | ||
fe08ba7e | 2335 | agg_unlock_node(hme->rn); /* decr ref count */ |
d62a17ae | 2336 | XFREE(MTYPE_RFAPI_MONITOR_ENCAP, hme); |
40381db7 | 2337 | vpn_bpi->extra->vnc.import.hme = NULL; |
d62a17ae | 2338 | } |
2339 | } | |
65efcfce LB |
2340 | } |
2341 | ||
2342 | /* | |
870d3d2c | 2343 | * Timer callback for withdraw |
65efcfce | 2344 | */ |
e6685141 | 2345 | static void rfapiWithdrawTimerVPN(struct event *t) |
65efcfce | 2346 | { |
e16d030c | 2347 | struct rfapi_withdraw *wcb = EVENT_ARG(t); |
40381db7 | 2348 | struct bgp_path_info *bpi = wcb->info; |
d62a17ae | 2349 | struct bgp *bgp = bgp_get_default(); |
26a3ffd6 | 2350 | const struct prefix *p; |
d62a17ae | 2351 | struct rfapi_monitor_vpn *moved; |
2352 | afi_t afi; | |
870d3d2c | 2353 | bool early_exit = false; |
d62a17ae | 2354 | |
f4c713ae LB |
2355 | if (bgp == NULL) { |
2356 | vnc_zlog_debug_verbose( | |
2357 | "%s: NULL BGP pointer, assume shutdown race condition!!!", | |
2358 | __func__); | |
870d3d2c | 2359 | early_exit = true; |
f4c713ae | 2360 | } |
870d3d2c | 2361 | if (bgp && CHECK_FLAG(bgp->flags, BGP_FLAG_DELETE_IN_PROGRESS)) { |
f4c713ae | 2362 | vnc_zlog_debug_verbose( |
892fedb6 DA |
2363 | "%s: BGP delete in progress, assume shutdown race condition!!!", |
2364 | __func__); | |
870d3d2c MS |
2365 | early_exit = true; |
2366 | } | |
2367 | ||
2368 | /* This callback is responsible for the withdraw object's memory */ | |
2369 | if (early_exit) { | |
2370 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
cc9f21da | 2371 | return; |
f4c713ae | 2372 | } |
870d3d2c | 2373 | |
d62a17ae | 2374 | assert(wcb->node); |
40381db7 | 2375 | assert(bpi); |
d62a17ae | 2376 | assert(wcb->import_table); |
40381db7 | 2377 | assert(bpi->extra); |
d62a17ae | 2378 | |
2379 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_MPLS_VPN, wcb->lockoffset); | |
2380 | ||
26a3ffd6 DS |
2381 | vnc_zlog_debug_verbose("%s: removing bpi %p at prefix %pRN", __func__, |
2382 | bpi, wcb->node); | |
d62a17ae | 2383 | |
2384 | /* | |
2385 | * Remove the route (doubly-linked) | |
2386 | */ | |
40381db7 DS |
2387 | if (CHECK_FLAG(bpi->flags, BGP_PATH_VALID) |
2388 | && VALID_INTERIOR_TYPE(bpi->type)) | |
d62a17ae | 2389 | RFAPI_MONITOR_EXTERIOR(wcb->node)->valid_interior_count--; |
2390 | ||
26a3ffd6 DS |
2391 | p = agg_node_get_prefix(wcb->node); |
2392 | afi = family2afi(p->family); | |
d62a17ae | 2393 | wcb->import_table->holddown_count[afi] -= 1; /* keep count consistent */ |
40381db7 DS |
2394 | rfapiItBiIndexDel(wcb->node, bpi); |
2395 | rfapiBgpInfoDetach(wcb->node, bpi); /* with removed bpi */ | |
d62a17ae | 2396 | |
2397 | vnc_import_bgp_exterior_del_route_interior(bgp, wcb->import_table, | |
40381db7 | 2398 | wcb->node, bpi); |
d62a17ae | 2399 | |
2400 | ||
2401 | /* | |
2402 | * If VNC is configured to send response remove messages, AND | |
2403 | * if the removed route had a UN address, do response removal | |
2404 | * processing. | |
2405 | */ | |
2406 | if (!(bgp->rfapi_cfg->flags | |
2407 | & BGP_VNC_CONFIG_RESPONSE_REMOVAL_DISABLE)) { | |
2408 | ||
2409 | int has_valid_duplicate = 0; | |
40381db7 | 2410 | struct bgp_path_info *bpii; |
d62a17ae | 2411 | |
2412 | /* | |
2413 | * First check if there are any OTHER routes at this node | |
2414 | * that have the same nexthop and a valid UN address. If | |
2415 | * there are (e.g., from other peers), then the route isn't | |
2416 | * really gone, so skip sending a response removal message. | |
2417 | */ | |
40381db7 DS |
2418 | for (bpii = wcb->node->info; bpii; bpii = bpii->next) { |
2419 | if (rfapiVpnBiSamePtUn(bpi, bpii)) { | |
d62a17ae | 2420 | has_valid_duplicate = 1; |
2421 | break; | |
2422 | } | |
2423 | } | |
2424 | ||
2425 | vnc_zlog_debug_verbose("%s: has_valid_duplicate=%d", __func__, | |
2426 | has_valid_duplicate); | |
2427 | ||
2428 | if (!has_valid_duplicate) { | |
2429 | rfapiRibPendingDeleteRoute(bgp, wcb->import_table, afi, | |
2430 | wcb->node); | |
2431 | } | |
2432 | } | |
2433 | ||
40381db7 | 2434 | rfapiMonitorEncapDelete(bpi); |
d62a17ae | 2435 | |
2436 | /* | |
2437 | * If there are no VPN monitors at this VPN Node A, | |
2438 | * we are done | |
2439 | */ | |
2440 | if (!RFAPI_MONITOR_VPN(wcb->node)) { | |
2441 | vnc_zlog_debug_verbose("%s: no VPN monitors at this node", | |
2442 | __func__); | |
2443 | goto done; | |
2444 | } | |
2445 | ||
2446 | /* | |
2447 | * rfapiMonitorMoveShorter only moves monitors if there are | |
2448 | * no remaining valid routes at the current node | |
2449 | */ | |
2450 | moved = rfapiMonitorMoveShorter(wcb->node, 1); | |
2451 | ||
2452 | if (moved) { | |
2453 | rfapiMonitorMovedUp(wcb->import_table, wcb->node, moved->node, | |
2454 | moved); | |
2455 | } | |
65efcfce LB |
2456 | |
2457 | done: | |
d62a17ae | 2458 | /* |
40381db7 | 2459 | * Free VPN bpi |
d62a17ae | 2460 | */ |
40381db7 | 2461 | rfapiBgpInfoFree(bpi); |
d62a17ae | 2462 | wcb->info = NULL; |
2463 | ||
2464 | /* | |
2465 | * If route count at this node has gone to 0, withdraw exported prefix | |
2466 | */ | |
2467 | if (!wcb->node->info) { | |
2468 | /* see if the struct rfapi_it_extra is empty and can be freed */ | |
2469 | rfapiMonitorExtraPrune(SAFI_MPLS_VPN, wcb->node); | |
2470 | vnc_direct_bgp_del_prefix(bgp, wcb->import_table, wcb->node); | |
2471 | vnc_zebra_del_prefix(bgp, wcb->import_table, wcb->node); | |
2472 | } else { | |
2473 | /* | |
2474 | * nexthop change event | |
2475 | * vnc_direct_bgp_add_prefix() will recompute the VN addr | |
2476 | * ecommunity | |
2477 | */ | |
2478 | vnc_direct_bgp_add_prefix(bgp, wcb->import_table, wcb->node); | |
2479 | } | |
2480 | ||
2481 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_MPLS_VPN, 1 + wcb->lockoffset); | |
fe08ba7e | 2482 | agg_unlock_node(wcb->node); /* decr ref count */ |
d62a17ae | 2483 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); |
65efcfce LB |
2484 | } |
2485 | ||
2486 | /* | |
2487 | * This works for multiprotocol extension, but not for plain ol' | |
2488 | * unicast IPv4 because that nexthop is stored in attr->nexthop | |
2489 | */ | |
d62a17ae | 2490 | void rfapiNexthop2Prefix(struct attr *attr, struct prefix *p) |
65efcfce | 2491 | { |
d62a17ae | 2492 | assert(p); |
2493 | assert(attr); | |
2494 | ||
2495 | memset(p, 0, sizeof(struct prefix)); | |
2496 | ||
2497 | switch (p->family = BGP_MP_NEXTHOP_FAMILY(attr->mp_nexthop_len)) { | |
2498 | case AF_INET: | |
2499 | p->u.prefix4 = attr->mp_nexthop_global_in; | |
30360041 | 2500 | p->prefixlen = IPV4_MAX_BITLEN; |
d62a17ae | 2501 | break; |
2502 | ||
2503 | case AF_INET6: | |
2504 | p->u.prefix6 = attr->mp_nexthop_global; | |
135e9bdb | 2505 | p->prefixlen = IPV6_MAX_BITLEN; |
d62a17ae | 2506 | break; |
2507 | ||
2508 | default: | |
2509 | vnc_zlog_debug_verbose("%s: Family is unknown = %d", __func__, | |
2510 | p->family); | |
2511 | } | |
65efcfce LB |
2512 | } |
2513 | ||
d62a17ae | 2514 | void rfapiUnicastNexthop2Prefix(afi_t afi, struct attr *attr, struct prefix *p) |
65efcfce | 2515 | { |
d62a17ae | 2516 | if (afi == AFI_IP) { |
2517 | p->family = AF_INET; | |
30360041 | 2518 | p->prefixlen = IPV4_MAX_BITLEN; |
d62a17ae | 2519 | p->u.prefix4 = attr->nexthop; |
2520 | } else { | |
2521 | rfapiNexthop2Prefix(attr, p); | |
2522 | } | |
65efcfce LB |
2523 | } |
2524 | ||
d62a17ae | 2525 | static int rfapiAttrNexthopAddrDifferent(struct prefix *p1, struct prefix *p2) |
65efcfce | 2526 | { |
d62a17ae | 2527 | if (!p1 || !p2) { |
2528 | vnc_zlog_debug_verbose("%s: p1 or p2 is NULL", __func__); | |
2529 | return 1; | |
2530 | } | |
2531 | ||
2532 | /* | |
2533 | * Are address families the same? | |
2534 | */ | |
2535 | if (p1->family != p2->family) { | |
2536 | return 1; | |
2537 | } | |
2538 | ||
2539 | switch (p1->family) { | |
2540 | case AF_INET: | |
2541 | if (IPV4_ADDR_SAME(&p1->u.prefix4, &p2->u.prefix4)) | |
2542 | return 0; | |
2543 | break; | |
2544 | ||
2545 | case AF_INET6: | |
2546 | if (IPV6_ADDR_SAME(&p1->u.prefix6, &p2->u.prefix6)) | |
2547 | return 0; | |
2548 | break; | |
2549 | ||
2550 | default: | |
2551 | assert(1); | |
2552 | } | |
2553 | ||
2554 | return 1; | |
65efcfce LB |
2555 | } |
2556 | ||
40381db7 DS |
2557 | static void rfapiCopyUnEncap2VPN(struct bgp_path_info *encap_bpi, |
2558 | struct bgp_path_info *vpn_bpi) | |
65efcfce | 2559 | { |
40381db7 DS |
2560 | if (!vpn_bpi || !vpn_bpi->extra) { |
2561 | zlog_warn("%s: no vpn bpi attr/extra, can't copy UN address", | |
d62a17ae | 2562 | __func__); |
2563 | return; | |
2564 | } | |
2565 | ||
40381db7 | 2566 | switch (BGP_MP_NEXTHOP_FAMILY(encap_bpi->attr->mp_nexthop_len)) { |
d62a17ae | 2567 | case AF_INET: |
2568 | ||
2569 | /* | |
2570 | * instrumentation to debug segfault of 091127 | |
2571 | */ | |
40381db7 | 2572 | vnc_zlog_debug_verbose("%s: vpn_bpi=%p", __func__, vpn_bpi); |
e6b457ac DA |
2573 | vnc_zlog_debug_verbose("%s: vpn_bpi->extra=%p", __func__, |
2574 | vpn_bpi->extra); | |
d62a17ae | 2575 | |
40381db7 DS |
2576 | vpn_bpi->extra->vnc.import.un_family = AF_INET; |
2577 | vpn_bpi->extra->vnc.import.un.addr4 = | |
2578 | encap_bpi->attr->mp_nexthop_global_in; | |
d62a17ae | 2579 | break; |
2580 | ||
2581 | case AF_INET6: | |
40381db7 DS |
2582 | vpn_bpi->extra->vnc.import.un_family = AF_INET6; |
2583 | vpn_bpi->extra->vnc.import.un.addr6 = | |
2584 | encap_bpi->attr->mp_nexthop_global; | |
d62a17ae | 2585 | break; |
2586 | ||
2587 | default: | |
2588 | zlog_warn("%s: invalid encap nexthop length: %d", __func__, | |
40381db7 | 2589 | encap_bpi->attr->mp_nexthop_len); |
c7ca5ccf | 2590 | vpn_bpi->extra->vnc.import.un_family = AF_UNSPEC; |
d62a17ae | 2591 | break; |
2592 | } | |
65efcfce LB |
2593 | } |
2594 | ||
2595 | /* | |
2596 | * returns 0 on success, nonzero on error | |
2597 | */ | |
40381db7 DS |
2598 | static int |
2599 | rfapiWithdrawEncapUpdateCachedUn(struct rfapi_import_table *import_table, | |
2600 | struct bgp_path_info *encap_bpi, | |
2601 | struct agg_node *vpn_rn, | |
2602 | struct bgp_path_info *vpn_bpi) | |
65efcfce | 2603 | { |
40381db7 | 2604 | if (!encap_bpi) { |
d62a17ae | 2605 | |
2606 | /* | |
2607 | * clear cached UN address | |
2608 | */ | |
40381db7 | 2609 | if (!vpn_bpi || !vpn_bpi->extra) { |
d62a17ae | 2610 | zlog_warn( |
40381db7 | 2611 | "%s: missing VPN bpi/extra, can't clear UN addr", |
d62a17ae | 2612 | __func__); |
2613 | return 1; | |
2614 | } | |
c7ca5ccf | 2615 | vpn_bpi->extra->vnc.import.un_family = AF_UNSPEC; |
40381db7 DS |
2616 | memset(&vpn_bpi->extra->vnc.import.un, 0, |
2617 | sizeof(vpn_bpi->extra->vnc.import.un)); | |
2618 | if (CHECK_FLAG(vpn_bpi->flags, BGP_PATH_VALID)) { | |
2619 | if (rfapiGetVncTunnelUnAddr(vpn_bpi->attr, NULL)) { | |
2620 | UNSET_FLAG(vpn_bpi->flags, BGP_PATH_VALID); | |
2621 | if (VALID_INTERIOR_TYPE(vpn_bpi->type)) | |
d62a17ae | 2622 | RFAPI_MONITOR_EXTERIOR(vpn_rn) |
2623 | ->valid_interior_count--; | |
2624 | /* signal interior route withdrawal to | |
2625 | * import-exterior */ | |
2626 | vnc_import_bgp_exterior_del_route_interior( | |
2627 | bgp_get_default(), import_table, vpn_rn, | |
40381db7 | 2628 | vpn_bpi); |
d62a17ae | 2629 | } |
2630 | } | |
2631 | ||
2632 | } else { | |
40381db7 DS |
2633 | if (!vpn_bpi) { |
2634 | zlog_warn("%s: missing VPN bpi, can't clear UN addr", | |
d62a17ae | 2635 | __func__); |
2636 | return 1; | |
2637 | } | |
40381db7 DS |
2638 | rfapiCopyUnEncap2VPN(encap_bpi, vpn_bpi); |
2639 | if (!CHECK_FLAG(vpn_bpi->flags, BGP_PATH_VALID)) { | |
2640 | SET_FLAG(vpn_bpi->flags, BGP_PATH_VALID); | |
2641 | if (VALID_INTERIOR_TYPE(vpn_bpi->type)) | |
d62a17ae | 2642 | RFAPI_MONITOR_EXTERIOR(vpn_rn) |
2643 | ->valid_interior_count++; | |
2644 | /* signal interior route withdrawal to import-exterior | |
2645 | */ | |
2646 | vnc_import_bgp_exterior_add_route_interior( | |
2647 | bgp_get_default(), import_table, vpn_rn, | |
40381db7 | 2648 | vpn_bpi); |
d62a17ae | 2649 | } |
2650 | } | |
2651 | return 0; | |
65efcfce LB |
2652 | } |
2653 | ||
e6685141 | 2654 | static void rfapiWithdrawTimerEncap(struct event *t) |
65efcfce | 2655 | { |
e16d030c | 2656 | struct rfapi_withdraw *wcb = EVENT_ARG(t); |
40381db7 | 2657 | struct bgp_path_info *bpi = wcb->info; |
d62a17ae | 2658 | int was_first_route = 0; |
2659 | struct rfapi_monitor_encap *em; | |
2660 | struct skiplist *vpn_node_sl = skiplist_new(0, NULL, NULL); | |
2661 | ||
2662 | assert(wcb->node); | |
40381db7 | 2663 | assert(bpi); |
d62a17ae | 2664 | assert(wcb->import_table); |
2665 | ||
2666 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_ENCAP, 0); | |
2667 | ||
40381db7 | 2668 | if (wcb->node->info == bpi) |
d62a17ae | 2669 | was_first_route = 1; |
2670 | ||
2671 | /* | |
40381db7 | 2672 | * Remove the route/bpi and free it |
d62a17ae | 2673 | */ |
40381db7 DS |
2674 | rfapiBgpInfoDetach(wcb->node, bpi); |
2675 | rfapiBgpInfoFree(bpi); | |
d62a17ae | 2676 | |
2677 | if (!was_first_route) | |
2678 | goto done; | |
2679 | ||
2680 | for (em = RFAPI_MONITOR_ENCAP(wcb->node); em; em = em->next) { | |
2681 | ||
2682 | /* | |
40381db7 DS |
2683 | * Update monitoring VPN BPIs with new encap info at the |
2684 | * head of the encap bpi chain (which could be NULL after | |
2685 | * removing the expiring bpi above) | |
d62a17ae | 2686 | */ |
2687 | if (rfapiWithdrawEncapUpdateCachedUn(wcb->import_table, | |
2688 | wcb->node->info, em->node, | |
40381db7 | 2689 | em->bpi)) |
d62a17ae | 2690 | continue; |
2691 | ||
2692 | /* | |
2693 | * Build a list of unique VPN nodes referenced by these | |
2694 | * monitors. | |
2695 | * Use a skiplist for speed. | |
2696 | */ | |
2697 | skiplist_insert(vpn_node_sl, em->node, em->node); | |
2698 | } | |
2699 | ||
2700 | ||
2701 | /* | |
2702 | * for each VPN node referenced in the ENCAP monitors: | |
2703 | */ | |
fe08ba7e | 2704 | struct agg_node *rn; |
d62a17ae | 2705 | while (!skiplist_first(vpn_node_sl, (void **)&rn, NULL)) { |
2706 | if (!wcb->node->info) { | |
2707 | struct rfapi_monitor_vpn *moved; | |
2708 | ||
2709 | moved = rfapiMonitorMoveShorter(rn, 0); | |
2710 | if (moved) { | |
2711 | // rfapiDoRouteCallback(wcb->import_table, | |
2712 | // moved->node, moved); | |
2713 | rfapiMonitorMovedUp(wcb->import_table, rn, | |
2714 | moved->node, moved); | |
2715 | } | |
2716 | } else { | |
2717 | // rfapiDoRouteCallback(wcb->import_table, rn, NULL); | |
2718 | rfapiMonitorItNodeChanged(wcb->import_table, rn, NULL); | |
2719 | } | |
2720 | skiplist_delete_first(vpn_node_sl); | |
2721 | } | |
65efcfce LB |
2722 | |
2723 | done: | |
d62a17ae | 2724 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_ENCAP, 1); |
fe08ba7e | 2725 | agg_unlock_node(wcb->node); /* decr ref count */ |
d62a17ae | 2726 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); |
2727 | skiplist_free(vpn_node_sl); | |
65efcfce LB |
2728 | } |
2729 | ||
2730 | ||
2731 | /* | |
2732 | * Works for both VPN and ENCAP routes; timer_service_func is different | |
2733 | * in each case | |
2734 | */ | |
2735 | static void | |
d62a17ae | 2736 | rfapiBiStartWithdrawTimer(struct rfapi_import_table *import_table, |
40381db7 | 2737 | struct agg_node *rn, struct bgp_path_info *bpi, |
4b7e6066 | 2738 | afi_t afi, safi_t safi, |
e6685141 | 2739 | void (*timer_service_func)(struct event *)) |
65efcfce | 2740 | { |
d62a17ae | 2741 | uint32_t lifetime; |
2742 | struct rfapi_withdraw *wcb; | |
2743 | ||
40381db7 | 2744 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
a8fd6fde QY |
2745 | /* |
2746 | * Already on the path to being withdrawn, | |
2747 | * should already have a timer set up to | |
2748 | * delete it. | |
2749 | */ | |
2750 | vnc_zlog_debug_verbose( | |
2751 | "%s: already being withdrawn, do nothing", __func__); | |
2752 | return; | |
2753 | } | |
d62a17ae | 2754 | |
40381db7 | 2755 | rfapiGetVncLifetime(bpi->attr, &lifetime); |
d62a17ae | 2756 | vnc_zlog_debug_verbose("%s: VNC lifetime is %u", __func__, lifetime); |
2757 | ||
2758 | /* | |
2759 | * withdrawn routes get to hang around for a while | |
2760 | */ | |
40381db7 | 2761 | SET_FLAG(bpi->flags, BGP_PATH_REMOVED); |
d62a17ae | 2762 | |
2763 | /* set timer to remove the route later */ | |
2764 | lifetime = rfapiGetHolddownFromLifetime(lifetime); | |
2765 | vnc_zlog_debug_verbose("%s: using timeout %u", __func__, lifetime); | |
2766 | ||
2767 | /* | |
2768 | * Stash import_table, node, and info for use by timer | |
2769 | * service routine, which is supposed to free the wcb. | |
2770 | */ | |
2771 | wcb = XCALLOC(MTYPE_RFAPI_WITHDRAW, sizeof(struct rfapi_withdraw)); | |
d62a17ae | 2772 | wcb->node = rn; |
40381db7 | 2773 | wcb->info = bpi; |
d62a17ae | 2774 | wcb->import_table = import_table; |
40381db7 | 2775 | bgp_attr_intern(bpi->attr); |
d62a17ae | 2776 | |
2777 | if (VNC_DEBUG(VERBOSE)) { | |
2778 | vnc_zlog_debug_verbose( | |
40381db7 | 2779 | "%s: wcb values: node=%p, info=%p, import_table=%p (bpi follows)", |
d62a17ae | 2780 | __func__, wcb->node, wcb->info, wcb->import_table); |
40381db7 | 2781 | rfapiPrintBi(NULL, bpi); |
d62a17ae | 2782 | } |
2783 | ||
2784 | ||
40381db7 | 2785 | assert(bpi->extra); |
d62a17ae | 2786 | if (lifetime > UINT32_MAX / 1001) { |
2787 | /* sub-optimal case, but will probably never happen */ | |
40381db7 | 2788 | bpi->extra->vnc.import.timer = NULL; |
907a2395 DS |
2789 | event_add_timer(bm->master, timer_service_func, wcb, lifetime, |
2790 | &bpi->extra->vnc.import.timer); | |
d62a17ae | 2791 | } else { |
2792 | static uint32_t jitter; | |
2793 | uint32_t lifetime_msec; | |
2794 | ||
2795 | /* | |
2796 | * the goal here is to spread out the timers so they are | |
2797 | * sortable in the skip list | |
2798 | */ | |
2799 | if (++jitter >= 1000) | |
2800 | jitter = 0; | |
2801 | ||
2802 | lifetime_msec = (lifetime * 1000) + jitter; | |
2803 | ||
40381db7 | 2804 | bpi->extra->vnc.import.timer = NULL; |
907a2395 DS |
2805 | event_add_timer_msec(bm->master, timer_service_func, wcb, |
2806 | lifetime_msec, | |
2807 | &bpi->extra->vnc.import.timer); | |
d62a17ae | 2808 | } |
2809 | ||
1defdda8 | 2810 | /* re-sort route list (BGP_PATH_REMOVED routes are last) */ |
4b7e6066 | 2811 | if (((struct bgp_path_info *)rn->info)->next) { |
40381db7 DS |
2812 | rfapiBgpInfoDetach(rn, bpi); |
2813 | rfapiBgpInfoAttachSorted(rn, bpi, afi, safi); | |
d62a17ae | 2814 | } |
65efcfce LB |
2815 | } |
2816 | ||
2817 | ||
5a1ae2c2 DS |
2818 | typedef void(rfapi_bi_filtered_import_f)(struct rfapi_import_table *table, |
2819 | int action, struct peer *peer, | |
2820 | void *rfd, const struct prefix *prefix, | |
2821 | const struct prefix *aux_prefix, | |
2822 | afi_t afi, struct prefix_rd *prd, | |
2823 | struct attr *attr, uint8_t type, | |
2824 | uint8_t sub_type, uint32_t *label); | |
65efcfce LB |
2825 | |
2826 | ||
d62a17ae | 2827 | static void rfapiExpireEncapNow(struct rfapi_import_table *it, |
40381db7 | 2828 | struct agg_node *rn, struct bgp_path_info *bpi) |
65efcfce | 2829 | { |
d62a17ae | 2830 | struct rfapi_withdraw *wcb; |
e6685141 | 2831 | struct event t; |
d62a17ae | 2832 | |
2833 | /* | |
2834 | * pretend we're an expiring timer | |
2835 | */ | |
2836 | wcb = XCALLOC(MTYPE_RFAPI_WITHDRAW, sizeof(struct rfapi_withdraw)); | |
40381db7 | 2837 | wcb->info = bpi; |
d62a17ae | 2838 | wcb->node = rn; |
2839 | wcb->import_table = it; | |
2840 | memset(&t, 0, sizeof(t)); | |
2841 | t.arg = wcb; | |
2842 | rfapiWithdrawTimerEncap(&t); /* frees wcb */ | |
65efcfce LB |
2843 | } |
2844 | ||
d62a17ae | 2845 | static int rfapiGetNexthop(struct attr *attr, struct prefix *prefix) |
65efcfce | 2846 | { |
d62a17ae | 2847 | switch (BGP_MP_NEXTHOP_FAMILY(attr->mp_nexthop_len)) { |
2848 | case AF_INET: | |
2849 | prefix->family = AF_INET; | |
30360041 | 2850 | prefix->prefixlen = IPV4_MAX_BITLEN; |
d62a17ae | 2851 | prefix->u.prefix4 = attr->mp_nexthop_global_in; |
2852 | break; | |
2853 | case AF_INET6: | |
2854 | prefix->family = AF_INET6; | |
135e9bdb | 2855 | prefix->prefixlen = IPV6_MAX_BITLEN; |
d62a17ae | 2856 | prefix->u.prefix6 = attr->mp_nexthop_global; |
2857 | break; | |
2858 | default: | |
2859 | vnc_zlog_debug_verbose("%s: unknown attr->mp_nexthop_len %d", | |
2860 | __func__, attr->mp_nexthop_len); | |
2861 | return EINVAL; | |
2862 | } | |
2863 | return 0; | |
65efcfce LB |
2864 | } |
2865 | ||
d62a17ae | 2866 | /* |
9b6d8fcf | 2867 | * import a bgp_path_info if its route target list intersects with the |
65efcfce LB |
2868 | * import table's route target list |
2869 | */ | |
d62a17ae | 2870 | static void rfapiBgpInfoFilteredImportEncap( |
2871 | struct rfapi_import_table *import_table, int action, struct peer *peer, | |
2872 | void *rfd, /* set for looped back routes */ | |
5a1ae2c2 DS |
2873 | const struct prefix *p, |
2874 | const struct prefix *aux_prefix, /* Unused for encap routes */ | |
d62a17ae | 2875 | afi_t afi, struct prefix_rd *prd, |
9b6d8fcf | 2876 | struct attr *attr, /* part of bgp_path_info */ |
5a1ae2c2 | 2877 | uint8_t type, /* part of bgp_path_info */ |
9b6d8fcf DS |
2878 | uint8_t sub_type, /* part of bgp_path_info */ |
2879 | uint32_t *label) /* part of bgp_path_info */ | |
65efcfce | 2880 | { |
fe08ba7e DS |
2881 | struct agg_table *rt = NULL; |
2882 | struct agg_node *rn; | |
4b7e6066 | 2883 | struct bgp_path_info *info_new; |
40381db7 | 2884 | struct bgp_path_info *bpi; |
4b7e6066 | 2885 | struct bgp_path_info *next; |
d62a17ae | 2886 | char buf[BUFSIZ]; |
2887 | ||
40381db7 DS |
2888 | struct prefix p_firstbpi_old; |
2889 | struct prefix p_firstbpi_new; | |
d62a17ae | 2890 | int replacing = 0; |
2891 | const char *action_str = NULL; | |
2892 | struct prefix un_prefix; | |
2893 | ||
2894 | struct bgp *bgp; | |
2895 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
2896 | ||
2897 | switch (action) { | |
2898 | case FIF_ACTION_UPDATE: | |
2899 | action_str = "update"; | |
2900 | break; | |
2901 | case FIF_ACTION_WITHDRAW: | |
2902 | action_str = "withdraw"; | |
2903 | break; | |
2904 | case FIF_ACTION_KILL: | |
2905 | action_str = "kill"; | |
2906 | break; | |
2907 | default: | |
2908 | assert(0); | |
2909 | break; | |
2910 | } | |
2911 | ||
2912 | vnc_zlog_debug_verbose( | |
2913 | "%s: entry: %s: prefix %s/%d", __func__, action_str, | |
07380148 DA |
2914 | inet_ntop(p->family, &p->u.prefix, buf, sizeof(buf)), |
2915 | p->prefixlen); | |
d62a17ae | 2916 | |
40381db7 DS |
2917 | memset(&p_firstbpi_old, 0, sizeof(p_firstbpi_old)); |
2918 | memset(&p_firstbpi_new, 0, sizeof(p_firstbpi_new)); | |
d62a17ae | 2919 | |
2920 | if (action == FIF_ACTION_UPDATE) { | |
2921 | /* | |
2922 | * Compare rt lists. If no intersection, don't import this route | |
2923 | * On a withdraw, peer and RD are sufficient to determine if | |
2924 | * we should act. | |
2925 | */ | |
b53e67a3 | 2926 | if (!attr || !bgp_attr_get_ecommunity(attr)) { |
d62a17ae | 2927 | |
2928 | vnc_zlog_debug_verbose( | |
2929 | "%s: attr, extra, or ecommunity missing, not importing", | |
2930 | __func__); | |
2931 | return; | |
2932 | } | |
1e20238a | 2933 | #ifdef RFAPI_REQUIRE_ENCAP_BEEC |
b53e67a3 DA |
2934 | if (!rfapiEcommunitiesMatchBeec( |
2935 | bgp_attr_get_ecommunity(attr))) { | |
d62a17ae | 2936 | vnc_zlog_debug_verbose( |
2937 | "%s: it=%p: no match for BGP Encapsulation ecommunity", | |
2938 | __func__, import_table); | |
2939 | return; | |
2940 | } | |
65efcfce | 2941 | #endif |
b53e67a3 DA |
2942 | if (!rfapiEcommunitiesIntersect( |
2943 | import_table->rt_import_list, | |
2944 | bgp_attr_get_ecommunity(attr))) { | |
d62a17ae | 2945 | |
2946 | vnc_zlog_debug_verbose( | |
2947 | "%s: it=%p: no ecommunity intersection", | |
2948 | __func__, import_table); | |
2949 | return; | |
2950 | } | |
2951 | ||
2952 | /* | |
2953 | * Updates must also have a nexthop address | |
2954 | */ | |
2955 | memset(&un_prefix, 0, | |
2956 | sizeof(un_prefix)); /* keep valgrind happy */ | |
2957 | if (rfapiGetNexthop(attr, &un_prefix)) { | |
2958 | vnc_zlog_debug_verbose("%s: missing nexthop address", | |
2959 | __func__); | |
2960 | return; | |
2961 | } | |
2962 | } | |
2963 | ||
2964 | /* | |
2965 | * Figure out which radix tree the route would go into | |
2966 | */ | |
2967 | switch (afi) { | |
2968 | case AFI_IP: | |
2969 | case AFI_IP6: | |
2970 | rt = import_table->imported_encap[afi]; | |
2971 | break; | |
2972 | ||
58cf0823 DS |
2973 | case AFI_UNSPEC: |
2974 | case AFI_L2VPN: | |
2975 | case AFI_MAX: | |
450971aa | 2976 | flog_err(EC_LIB_DEVELOPMENT, "%s: bad afi %d", __func__, afi); |
d62a17ae | 2977 | return; |
2978 | } | |
2979 | ||
2980 | /* | |
fe08ba7e | 2981 | * agg_node_lookup returns a node only if there is at least |
d62a17ae | 2982 | * one route attached. |
2983 | */ | |
fe08ba7e | 2984 | rn = agg_node_lookup(rt, p); |
65efcfce | 2985 | |
1e20238a | 2986 | #ifdef DEBUG_ENCAP_MONITOR |
d62a17ae | 2987 | vnc_zlog_debug_verbose("%s: initial encap lookup(it=%p) rn=%p", |
2988 | __func__, import_table, rn); | |
65efcfce LB |
2989 | #endif |
2990 | ||
d62a17ae | 2991 | if (rn) { |
2992 | ||
2993 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, 1); | |
fe08ba7e | 2994 | agg_unlock_node(rn); /* undo lock in agg_node_lookup */ |
d62a17ae | 2995 | |
2996 | ||
2997 | /* | |
40381db7 | 2998 | * capture nexthop of first bpi |
d62a17ae | 2999 | */ |
3000 | if (rn->info) { | |
3001 | rfapiNexthop2Prefix( | |
4b7e6066 | 3002 | ((struct bgp_path_info *)(rn->info))->attr, |
40381db7 | 3003 | &p_firstbpi_old); |
d62a17ae | 3004 | } |
3005 | ||
40381db7 | 3006 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 3007 | |
3008 | /* | |
9b6d8fcf | 3009 | * Does this bgp_path_info refer to the same route |
d62a17ae | 3010 | * as we are trying to add? |
3011 | */ | |
40381db7 DS |
3012 | vnc_zlog_debug_verbose("%s: comparing BPI %p", __func__, |
3013 | bpi); | |
d62a17ae | 3014 | |
3015 | ||
3016 | /* | |
3017 | * Compare RDs | |
3018 | * | |
40381db7 DS |
3019 | * RD of import table bpi is in |
3020 | * bpi->extra->vnc.import.rd RD of info_orig is in prd | |
d62a17ae | 3021 | */ |
40381db7 DS |
3022 | if (!bpi->extra) { |
3023 | vnc_zlog_debug_verbose("%s: no bpi->extra", | |
d62a17ae | 3024 | __func__); |
3025 | continue; | |
3026 | } | |
3027 | if (prefix_cmp( | |
40381db7 | 3028 | (struct prefix *)&bpi->extra->vnc.import.rd, |
d62a17ae | 3029 | (struct prefix *)prd)) { |
3030 | ||
3031 | vnc_zlog_debug_verbose("%s: prd does not match", | |
3032 | __func__); | |
3033 | continue; | |
3034 | } | |
3035 | ||
3036 | /* | |
3037 | * Compare peers | |
3038 | */ | |
40381db7 | 3039 | if (bpi->peer != peer) { |
d62a17ae | 3040 | vnc_zlog_debug_verbose( |
3041 | "%s: peer does not match", __func__); | |
3042 | continue; | |
3043 | } | |
3044 | ||
40381db7 | 3045 | vnc_zlog_debug_verbose("%s: found matching bpi", |
d62a17ae | 3046 | __func__); |
3047 | ||
40381db7 | 3048 | /* Same route. Delete this bpi, replace with new one */ |
d62a17ae | 3049 | |
3050 | if (action == FIF_ACTION_WITHDRAW) { | |
3051 | ||
3052 | vnc_zlog_debug_verbose( | |
26a3ffd6 DS |
3053 | "%s: withdrawing at prefix %pRN", |
3054 | __func__, rn); | |
d62a17ae | 3055 | |
3056 | rfapiBiStartWithdrawTimer( | |
40381db7 | 3057 | import_table, rn, bpi, afi, SAFI_ENCAP, |
d62a17ae | 3058 | rfapiWithdrawTimerEncap); |
3059 | ||
3060 | } else { | |
3061 | vnc_zlog_debug_verbose( | |
26a3ffd6 | 3062 | "%s: %s at prefix %pRN", __func__, |
d62a17ae | 3063 | ((action == FIF_ACTION_KILL) |
3064 | ? "killing" | |
3065 | : "replacing"), | |
26a3ffd6 | 3066 | rn); |
d62a17ae | 3067 | |
3068 | /* | |
3069 | * If this route is waiting to be deleted | |
3070 | * because of | |
3071 | * a previous withdraw, we must cancel its | |
3072 | * timer. | |
3073 | */ | |
40381db7 DS |
3074 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
3075 | && bpi->extra->vnc.import.timer) { | |
e16d030c | 3076 | struct rfapi_withdraw *wcb = EVENT_ARG( |
c3aaa89a | 3077 | bpi->extra->vnc.import.timer); |
d62a17ae | 3078 | |
3079 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
e16d030c | 3080 | EVENT_OFF(bpi->extra->vnc.import.timer); |
d62a17ae | 3081 | } |
3082 | ||
3083 | if (action == FIF_ACTION_UPDATE) { | |
40381db7 DS |
3084 | rfapiBgpInfoDetach(rn, bpi); |
3085 | rfapiBgpInfoFree(bpi); | |
d62a17ae | 3086 | replacing = 1; |
3087 | } else { | |
3088 | /* | |
3089 | * Kill: do export stuff when removing | |
40381db7 | 3090 | * bpi |
d62a17ae | 3091 | */ |
3092 | struct rfapi_withdraw *wcb; | |
e6685141 | 3093 | struct event t; |
d62a17ae | 3094 | |
3095 | /* | |
3096 | * pretend we're an expiring timer | |
3097 | */ | |
3098 | wcb = XCALLOC( | |
3099 | MTYPE_RFAPI_WITHDRAW, | |
3100 | sizeof(struct rfapi_withdraw)); | |
40381db7 | 3101 | wcb->info = bpi; |
d62a17ae | 3102 | wcb->node = rn; |
3103 | wcb->import_table = import_table; | |
3104 | memset(&t, 0, sizeof(t)); | |
3105 | t.arg = wcb; | |
3106 | rfapiWithdrawTimerEncap( | |
3107 | &t); /* frees wcb */ | |
3108 | } | |
3109 | } | |
3110 | ||
3111 | break; | |
3112 | } | |
3113 | } | |
3114 | ||
3115 | if (rn) | |
3116 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, replacing ? 1 : 0); | |
3117 | ||
3118 | if (action == FIF_ACTION_WITHDRAW || action == FIF_ACTION_KILL) | |
3119 | return; | |
3120 | ||
3121 | info_new = | |
3122 | rfapiBgpInfoCreate(attr, peer, rfd, prd, type, sub_type, NULL); | |
3123 | ||
3124 | if (rn) { | |
3125 | if (!replacing) | |
40381db7 | 3126 | agg_lock_node(rn); /* incr ref count for new BPI */ |
d62a17ae | 3127 | } else { |
fe08ba7e | 3128 | rn = agg_node_get(rt, p); |
d62a17ae | 3129 | } |
3130 | ||
26a3ffd6 DS |
3131 | vnc_zlog_debug_verbose("%s: (afi=%d, rn=%p) inserting at prefix %pRN", |
3132 | __func__, afi, rn, rn); | |
d62a17ae | 3133 | |
3134 | rfapiBgpInfoAttachSorted(rn, info_new, afi, SAFI_ENCAP); | |
3135 | ||
3136 | /* | |
3137 | * Delete holddown routes from same NVE. See details in | |
3138 | * rfapiBgpInfoFilteredImportVPN() | |
3139 | */ | |
40381db7 | 3140 | for (bpi = info_new->next; bpi; bpi = next) { |
d62a17ae | 3141 | |
3142 | struct prefix pfx_un; | |
3143 | int un_match = 0; | |
3144 | ||
40381db7 DS |
3145 | next = bpi->next; |
3146 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) | |
d62a17ae | 3147 | continue; |
3148 | ||
3149 | /* | |
3150 | * We already match the VN address (it is the prefix | |
3151 | * of the route node) | |
3152 | */ | |
3153 | ||
40381db7 | 3154 | if (!rfapiGetNexthop(bpi->attr, &pfx_un) |
d62a17ae | 3155 | && prefix_same(&pfx_un, &un_prefix)) { |
3156 | ||
3157 | un_match = 1; | |
3158 | } | |
3159 | ||
3160 | if (!un_match) | |
3161 | continue; | |
3162 | ||
3163 | vnc_zlog_debug_verbose( | |
40381db7 | 3164 | "%s: removing holddown bpi matching NVE of new route", |
d62a17ae | 3165 | __func__); |
40381db7 | 3166 | if (bpi->extra->vnc.import.timer) { |
c3aaa89a | 3167 | struct rfapi_withdraw *wcb = |
e16d030c | 3168 | EVENT_ARG(bpi->extra->vnc.import.timer); |
d62a17ae | 3169 | |
3170 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
e16d030c | 3171 | EVENT_OFF(bpi->extra->vnc.import.timer); |
d62a17ae | 3172 | } |
40381db7 | 3173 | rfapiExpireEncapNow(import_table, rn, bpi); |
d62a17ae | 3174 | } |
3175 | ||
4b7e6066 | 3176 | rfapiNexthop2Prefix(((struct bgp_path_info *)(rn->info))->attr, |
40381db7 | 3177 | &p_firstbpi_new); |
d62a17ae | 3178 | |
3179 | /* | |
3180 | * If the nexthop address of the selected Encap route (i.e., | |
3181 | * the UN address) has changed, then we must update the VPN | |
3182 | * routes that refer to this Encap route and possibly force | |
3183 | * rfapi callbacks. | |
3184 | */ | |
40381db7 | 3185 | if (rfapiAttrNexthopAddrDifferent(&p_firstbpi_old, &p_firstbpi_new)) { |
d62a17ae | 3186 | |
3187 | struct rfapi_monitor_encap *m; | |
3188 | struct rfapi_monitor_encap *mnext; | |
3189 | ||
fe08ba7e | 3190 | struct agg_node *referenced_vpn_prefix; |
d62a17ae | 3191 | |
3192 | /* | |
3193 | * Optimized approach: build radix tree on the fly to | |
3194 | * hold list of VPN nodes referenced by the ENCAP monitors | |
3195 | * | |
3196 | * The nodes in this table correspond to prefixes of VPN routes. | |
3197 | * The "info" pointer of the node points to a chain of | |
3198 | * struct rfapi_monitor_encap, each of which refers to a | |
3199 | * specific VPN node. | |
3200 | */ | |
fe08ba7e | 3201 | struct agg_table *referenced_vpn_table; |
d62a17ae | 3202 | |
fe08ba7e | 3203 | referenced_vpn_table = agg_table_init(); |
d62a17ae | 3204 | |
3205 | /* | |
3206 | * iterate over the set of monitors at this ENCAP node. | |
3207 | */ | |
1e20238a | 3208 | #ifdef DEBUG_ENCAP_MONITOR |
d62a17ae | 3209 | vnc_zlog_debug_verbose("%s: examining monitors at rn=%p", |
3210 | __func__, rn); | |
65efcfce | 3211 | #endif |
d62a17ae | 3212 | for (m = RFAPI_MONITOR_ENCAP(rn); m; m = m->next) { |
26a3ffd6 | 3213 | const struct prefix *p; |
d62a17ae | 3214 | |
3215 | /* | |
40381db7 | 3216 | * For each referenced bpi/route, copy the ENCAP route's |
d62a17ae | 3217 | * nexthop to the VPN route's cached UN address field |
3218 | * and set | |
3219 | * the address family of the cached UN address field. | |
3220 | */ | |
40381db7 DS |
3221 | rfapiCopyUnEncap2VPN(info_new, m->bpi); |
3222 | if (!CHECK_FLAG(m->bpi->flags, BGP_PATH_VALID)) { | |
3223 | SET_FLAG(m->bpi->flags, BGP_PATH_VALID); | |
3224 | if (VALID_INTERIOR_TYPE(m->bpi->type)) | |
d62a17ae | 3225 | RFAPI_MONITOR_EXTERIOR(m->node) |
3226 | ->valid_interior_count++; | |
3227 | vnc_import_bgp_exterior_add_route_interior( | |
40381db7 | 3228 | bgp, import_table, m->node, m->bpi); |
d62a17ae | 3229 | } |
3230 | ||
3231 | /* | |
3232 | * Build a list of unique VPN nodes referenced by these | |
3233 | * monitors | |
3234 | * | |
3235 | * There could be more than one VPN node here with a | |
3236 | * given | |
3237 | * prefix. Those are currently in an unsorted linear | |
3238 | * list | |
3239 | * per prefix. | |
3240 | */ | |
26a3ffd6 | 3241 | p = agg_node_get_prefix(m->node); |
fe08ba7e | 3242 | referenced_vpn_prefix = |
26a3ffd6 | 3243 | agg_node_get(referenced_vpn_table, p); |
d62a17ae | 3244 | assert(referenced_vpn_prefix); |
3245 | for (mnext = referenced_vpn_prefix->info; mnext; | |
3246 | mnext = mnext->next) { | |
3247 | ||
3248 | if (mnext->node == m->node) | |
3249 | break; | |
3250 | } | |
3251 | ||
3252 | if (mnext) { | |
3253 | /* | |
3254 | * already have an entry for this VPN node | |
3255 | */ | |
fe08ba7e | 3256 | agg_unlock_node(referenced_vpn_prefix); |
d62a17ae | 3257 | } else { |
3258 | mnext = XCALLOC( | |
3259 | MTYPE_RFAPI_MONITOR_ENCAP, | |
3260 | sizeof(struct rfapi_monitor_encap)); | |
d62a17ae | 3261 | mnext->node = m->node; |
3262 | mnext->next = referenced_vpn_prefix->info; | |
3263 | referenced_vpn_prefix->info = mnext; | |
3264 | } | |
3265 | } | |
3266 | ||
3267 | /* | |
3268 | * for each VPN node referenced in the ENCAP monitors: | |
3269 | */ | |
fe08ba7e DS |
3270 | for (referenced_vpn_prefix = |
3271 | agg_route_top(referenced_vpn_table); | |
3272 | referenced_vpn_prefix; | |
3273 | referenced_vpn_prefix = | |
3274 | agg_route_next(referenced_vpn_prefix)) { | |
d62a17ae | 3275 | |
3276 | while ((m = referenced_vpn_prefix->info)) { | |
3277 | ||
fe08ba7e | 3278 | struct agg_node *n; |
d62a17ae | 3279 | |
3280 | rfapiMonitorMoveLonger(m->node); | |
fe08ba7e | 3281 | for (n = m->node; n; n = agg_node_parent(n)) { |
d62a17ae | 3282 | // rfapiDoRouteCallback(import_table, n, |
3283 | // NULL); | |
3284 | } | |
3285 | rfapiMonitorItNodeChanged(import_table, m->node, | |
3286 | NULL); | |
3287 | ||
3288 | referenced_vpn_prefix->info = m->next; | |
fe08ba7e | 3289 | agg_unlock_node(referenced_vpn_prefix); |
d62a17ae | 3290 | XFREE(MTYPE_RFAPI_MONITOR_ENCAP, m); |
3291 | } | |
3292 | } | |
fe08ba7e | 3293 | agg_table_finish(referenced_vpn_table); |
d62a17ae | 3294 | } |
3295 | ||
3296 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, 0); | |
65efcfce LB |
3297 | } |
3298 | ||
d62a17ae | 3299 | static void rfapiExpireVpnNow(struct rfapi_import_table *it, |
40381db7 | 3300 | struct agg_node *rn, struct bgp_path_info *bpi, |
d62a17ae | 3301 | int lockoffset) |
65efcfce | 3302 | { |
d62a17ae | 3303 | struct rfapi_withdraw *wcb; |
e6685141 | 3304 | struct event t; |
d62a17ae | 3305 | |
3306 | /* | |
3307 | * pretend we're an expiring timer | |
3308 | */ | |
3309 | wcb = XCALLOC(MTYPE_RFAPI_WITHDRAW, sizeof(struct rfapi_withdraw)); | |
40381db7 | 3310 | wcb->info = bpi; |
d62a17ae | 3311 | wcb->node = rn; |
3312 | wcb->import_table = it; | |
3313 | wcb->lockoffset = lockoffset; | |
3314 | memset(&t, 0, sizeof(t)); | |
3315 | t.arg = wcb; | |
3316 | rfapiWithdrawTimerVPN(&t); /* frees wcb */ | |
65efcfce LB |
3317 | } |
3318 | ||
3319 | ||
d62a17ae | 3320 | /* |
9b6d8fcf | 3321 | * import a bgp_path_info if its route target list intersects with the |
65efcfce LB |
3322 | * import table's route target list |
3323 | */ | |
d62a17ae | 3324 | void rfapiBgpInfoFilteredImportVPN( |
3325 | struct rfapi_import_table *import_table, int action, struct peer *peer, | |
3326 | void *rfd, /* set for looped back routes */ | |
5a1ae2c2 DS |
3327 | const struct prefix *p, |
3328 | const struct prefix *aux_prefix, /* AFI_L2VPN: optional IP */ | |
d62a17ae | 3329 | afi_t afi, struct prefix_rd *prd, |
9b6d8fcf | 3330 | struct attr *attr, /* part of bgp_path_info */ |
5a1ae2c2 | 3331 | uint8_t type, /* part of bgp_path_info */ |
9b6d8fcf DS |
3332 | uint8_t sub_type, /* part of bgp_path_info */ |
3333 | uint32_t *label) /* part of bgp_path_info */ | |
65efcfce | 3334 | { |
fe08ba7e DS |
3335 | struct agg_table *rt = NULL; |
3336 | struct agg_node *rn; | |
3337 | struct agg_node *n; | |
4b7e6066 | 3338 | struct bgp_path_info *info_new; |
40381db7 | 3339 | struct bgp_path_info *bpi; |
4b7e6066 | 3340 | struct bgp_path_info *next; |
d62a17ae | 3341 | char buf[BUFSIZ]; |
3342 | struct prefix vn_prefix; | |
3343 | struct prefix un_prefix; | |
3344 | int un_prefix_valid = 0; | |
fe08ba7e | 3345 | struct agg_node *ern; |
d62a17ae | 3346 | int replacing = 0; |
3347 | int original_had_routes = 0; | |
3348 | struct prefix original_nexthop; | |
3349 | const char *action_str = NULL; | |
3350 | int is_it_ce = 0; | |
3351 | ||
3352 | struct bgp *bgp; | |
3353 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
3354 | ||
3355 | switch (action) { | |
3356 | case FIF_ACTION_UPDATE: | |
3357 | action_str = "update"; | |
3358 | break; | |
3359 | case FIF_ACTION_WITHDRAW: | |
3360 | action_str = "withdraw"; | |
3361 | break; | |
3362 | case FIF_ACTION_KILL: | |
3363 | action_str = "kill"; | |
3364 | break; | |
3365 | default: | |
3366 | assert(0); | |
3367 | break; | |
3368 | } | |
3369 | ||
3370 | if (import_table == bgp->rfapi->it_ce) | |
3371 | is_it_ce = 1; | |
3372 | ||
3373 | vnc_zlog_debug_verbose("%s: entry: %s%s: prefix %s/%d: it %p, afi %s", | |
3374 | __func__, (is_it_ce ? "CE-IT " : ""), action_str, | |
3375 | rfapi_ntop(p->family, &p->u.prefix, buf, BUFSIZ), | |
3376 | p->prefixlen, import_table, afi2str(afi)); | |
3377 | ||
3378 | VNC_ITRCCK; | |
3379 | ||
3380 | /* | |
3381 | * Compare rt lists. If no intersection, don't import this route | |
3382 | * On a withdraw, peer and RD are sufficient to determine if | |
3383 | * we should act. | |
3384 | */ | |
3385 | if (action == FIF_ACTION_UPDATE) { | |
b53e67a3 | 3386 | if (!attr || !bgp_attr_get_ecommunity(attr)) { |
d62a17ae | 3387 | |
3388 | vnc_zlog_debug_verbose( | |
3389 | "%s: attr, extra, or ecommunity missing, not importing", | |
3390 | __func__); | |
3391 | return; | |
3392 | } | |
b53e67a3 DA |
3393 | if ((import_table != bgp->rfapi->it_ce) && |
3394 | !rfapiEcommunitiesIntersect( | |
3395 | import_table->rt_import_list, | |
3396 | bgp_attr_get_ecommunity(attr))) { | |
d62a17ae | 3397 | |
3398 | vnc_zlog_debug_verbose( | |
3399 | "%s: it=%p: no ecommunity intersection", | |
3400 | __func__, import_table); | |
3401 | return; | |
3402 | } | |
3403 | ||
3404 | memset(&vn_prefix, 0, | |
3405 | sizeof(vn_prefix)); /* keep valgrind happy */ | |
3406 | if (rfapiGetNexthop(attr, &vn_prefix)) { | |
3407 | /* missing nexthop address would be a bad, bad thing */ | |
3408 | vnc_zlog_debug_verbose("%s: missing nexthop", __func__); | |
3409 | return; | |
3410 | } | |
3411 | } | |
3412 | ||
3413 | /* | |
3414 | * Figure out which radix tree the route would go into | |
3415 | */ | |
3416 | switch (afi) { | |
3417 | case AFI_IP: | |
3418 | case AFI_IP6: | |
3419 | case AFI_L2VPN: | |
3420 | rt = import_table->imported_vpn[afi]; | |
3421 | break; | |
3422 | ||
58cf0823 DS |
3423 | case AFI_UNSPEC: |
3424 | case AFI_MAX: | |
450971aa | 3425 | flog_err(EC_LIB_DEVELOPMENT, "%s: bad afi %d", __func__, afi); |
d62a17ae | 3426 | return; |
3427 | } | |
3428 | ||
3429 | /* clear it */ | |
3430 | memset(&original_nexthop, 0, sizeof(original_nexthop)); | |
3431 | ||
3432 | /* | |
fe08ba7e | 3433 | * agg_node_lookup returns a node only if there is at least |
d62a17ae | 3434 | * one route attached. |
3435 | */ | |
fe08ba7e | 3436 | rn = agg_node_lookup(rt, p); |
d62a17ae | 3437 | |
3438 | vnc_zlog_debug_verbose("%s: rn=%p", __func__, rn); | |
3439 | ||
3440 | if (rn) { | |
3441 | ||
3442 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, 1); | |
fe08ba7e | 3443 | agg_unlock_node(rn); /* undo lock in agg_node_lookup */ |
d62a17ae | 3444 | |
3445 | if (rn->info) | |
3446 | original_had_routes = 1; | |
3447 | ||
3448 | if (VNC_DEBUG(VERBOSE)) { | |
3449 | vnc_zlog_debug_verbose("%s: showing IT node on entry", | |
3450 | __func__); | |
3451 | rfapiShowItNode(NULL, rn); /* debug */ | |
3452 | } | |
3453 | ||
3454 | /* | |
3455 | * Look for same route (will have same RD and peer) | |
3456 | */ | |
40381db7 | 3457 | bpi = rfapiItBiIndexSearch(rn, prd, peer, aux_prefix); |
d62a17ae | 3458 | |
40381db7 | 3459 | if (bpi) { |
d62a17ae | 3460 | |
3461 | /* | |
3462 | * This was an old test when we iterated over the | |
40381db7 | 3463 | * BPIs linearly. Since we're now looking up with |
d62a17ae | 3464 | * RD and peer, comparing types should not be |
3465 | * needed. Changed to assertion. | |
3466 | * | |
3467 | * Compare types. Doing so prevents a RFP-originated | |
3468 | * route from matching an imported route, for example. | |
3469 | */ | |
40381db7 | 3470 | if (VNC_DEBUG(VERBOSE) && bpi->type != type) |
3af8cb57 | 3471 | /* should be handled by RDs, but warn for now */ |
40381db7 DS |
3472 | zlog_warn("%s: type mismatch! (bpi=%d, arg=%d)", |
3473 | __func__, bpi->type, type); | |
d62a17ae | 3474 | |
40381db7 | 3475 | vnc_zlog_debug_verbose("%s: found matching bpi", |
d62a17ae | 3476 | __func__); |
3477 | ||
3478 | /* | |
3479 | * In the special CE table, withdrawals occur without | |
3480 | * holddown | |
3481 | */ | |
3482 | if (import_table == bgp->rfapi->it_ce) { | |
40381db7 | 3483 | vnc_direct_bgp_del_route_ce(bgp, rn, bpi); |
d62a17ae | 3484 | if (action == FIF_ACTION_WITHDRAW) |
3485 | action = FIF_ACTION_KILL; | |
3486 | } | |
3487 | ||
3488 | if (action == FIF_ACTION_WITHDRAW) { | |
3489 | ||
40381db7 DS |
3490 | int washolddown = CHECK_FLAG(bpi->flags, |
3491 | BGP_PATH_REMOVED); | |
d62a17ae | 3492 | |
3493 | vnc_zlog_debug_verbose( | |
26a3ffd6 DS |
3494 | "%s: withdrawing at prefix %pRN%s", |
3495 | __func__, rn, | |
d62a17ae | 3496 | (washolddown |
3497 | ? " (already being withdrawn)" | |
3498 | : "")); | |
3499 | ||
3500 | VNC_ITRCCK; | |
3501 | if (!washolddown) { | |
3502 | rfapiBiStartWithdrawTimer( | |
40381db7 | 3503 | import_table, rn, bpi, afi, |
d62a17ae | 3504 | SAFI_MPLS_VPN, |
3505 | rfapiWithdrawTimerVPN); | |
3506 | ||
3507 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 3508 | bpi, import_table, afi, -1); |
d62a17ae | 3509 | import_table->holddown_count[afi] += 1; |
3510 | } | |
3511 | VNC_ITRCCK; | |
3512 | } else { | |
3513 | vnc_zlog_debug_verbose( | |
26a3ffd6 | 3514 | "%s: %s at prefix %pRN", __func__, |
d62a17ae | 3515 | ((action == FIF_ACTION_KILL) |
3516 | ? "killing" | |
3517 | : "replacing"), | |
26a3ffd6 | 3518 | rn); |
d62a17ae | 3519 | |
3520 | /* | |
3521 | * If this route is waiting to be deleted | |
3522 | * because of | |
3523 | * a previous withdraw, we must cancel its | |
3524 | * timer. | |
3525 | */ | |
40381db7 DS |
3526 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
3527 | && bpi->extra->vnc.import.timer) { | |
e16d030c | 3528 | struct rfapi_withdraw *wcb = EVENT_ARG( |
c3aaa89a | 3529 | bpi->extra->vnc.import.timer); |
d62a17ae | 3530 | |
3531 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
e16d030c | 3532 | EVENT_OFF(bpi->extra->vnc.import.timer); |
d62a17ae | 3533 | |
3534 | import_table->holddown_count[afi] -= 1; | |
3535 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 3536 | bpi, import_table, afi, 1); |
d62a17ae | 3537 | } |
3538 | /* | |
3539 | * decrement remote count (if route is remote) | |
3540 | * because | |
3541 | * we are going to remove it below | |
3542 | */ | |
40381db7 DS |
3543 | RFAPI_UPDATE_ITABLE_COUNT(bpi, import_table, |
3544 | afi, -1); | |
d62a17ae | 3545 | if (action == FIF_ACTION_UPDATE) { |
3546 | replacing = 1; | |
3547 | ||
3548 | /* | |
3549 | * make copy of original nexthop so we | |
3550 | * can see if it changed | |
3551 | */ | |
40381db7 | 3552 | rfapiGetNexthop(bpi->attr, |
d62a17ae | 3553 | &original_nexthop); |
3554 | ||
3555 | /* | |
40381db7 | 3556 | * remove bpi without doing any export |
d62a17ae | 3557 | * processing |
3558 | */ | |
40381db7 | 3559 | if (CHECK_FLAG(bpi->flags, |
1defdda8 | 3560 | BGP_PATH_VALID) |
40381db7 | 3561 | && VALID_INTERIOR_TYPE(bpi->type)) |
d62a17ae | 3562 | RFAPI_MONITOR_EXTERIOR(rn) |
3563 | ->valid_interior_count--; | |
40381db7 DS |
3564 | rfapiItBiIndexDel(rn, bpi); |
3565 | rfapiBgpInfoDetach(rn, bpi); | |
3566 | rfapiMonitorEncapDelete(bpi); | |
d62a17ae | 3567 | vnc_import_bgp_exterior_del_route_interior( |
40381db7 DS |
3568 | bgp, import_table, rn, bpi); |
3569 | rfapiBgpInfoFree(bpi); | |
d62a17ae | 3570 | } else { |
3571 | /* Kill */ | |
3572 | /* | |
40381db7 | 3573 | * remove bpi and do export processing |
d62a17ae | 3574 | */ |
3575 | import_table->holddown_count[afi] += 1; | |
40381db7 | 3576 | rfapiExpireVpnNow(import_table, rn, bpi, |
d62a17ae | 3577 | 0); |
3578 | } | |
3579 | } | |
3580 | } | |
3581 | } | |
3582 | ||
3583 | if (rn) | |
3584 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, replacing ? 1 : 0); | |
3585 | ||
3586 | if (action == FIF_ACTION_WITHDRAW || action == FIF_ACTION_KILL) { | |
3587 | VNC_ITRCCK; | |
3588 | return; | |
3589 | } | |
3590 | ||
3591 | info_new = | |
3592 | rfapiBgpInfoCreate(attr, peer, rfd, prd, type, sub_type, label); | |
3593 | ||
3594 | /* | |
3595 | * lookup un address in encap table | |
3596 | */ | |
fe08ba7e | 3597 | ern = agg_node_match(import_table->imported_encap[afi], &vn_prefix); |
d62a17ae | 3598 | if (ern) { |
3599 | rfapiCopyUnEncap2VPN(ern->info, info_new); | |
fe08ba7e | 3600 | agg_unlock_node(ern); /* undo lock in route_note_match */ |
d62a17ae | 3601 | } else { |
d62a17ae | 3602 | /* Not a big deal, just means VPN route got here first */ |
2dbe669b DA |
3603 | vnc_zlog_debug_verbose("%s: no encap route for vn addr %pFX", |
3604 | __func__, &vn_prefix); | |
c7ca5ccf | 3605 | info_new->extra->vnc.import.un_family = AF_UNSPEC; |
d62a17ae | 3606 | } |
3607 | ||
3608 | if (rn) { | |
3609 | if (!replacing) | |
fe08ba7e | 3610 | agg_lock_node(rn); |
d62a17ae | 3611 | } else { |
3612 | /* | |
3613 | * No need to increment reference count, so only "get" | |
3614 | * if the node is not there already | |
3615 | */ | |
fe08ba7e | 3616 | rn = agg_node_get(rt, p); |
d62a17ae | 3617 | } |
3618 | ||
3619 | /* | |
3620 | * For ethernet routes, if there is an accompanying IP address, | |
40381db7 | 3621 | * save it in the bpi |
d62a17ae | 3622 | */ |
3623 | if ((AFI_L2VPN == afi) && aux_prefix) { | |
3624 | ||
40381db7 DS |
3625 | vnc_zlog_debug_verbose("%s: setting BPI's aux_prefix", |
3626 | __func__); | |
d62a17ae | 3627 | info_new->extra->vnc.import.aux_prefix = *aux_prefix; |
3628 | } | |
3629 | ||
26a3ffd6 | 3630 | vnc_zlog_debug_verbose("%s: inserting bpi %p at prefix %pRN #%d", |
c10e14e9 DS |
3631 | __func__, info_new, rn, |
3632 | agg_node_get_lock_count(rn)); | |
d62a17ae | 3633 | |
3634 | rfapiBgpInfoAttachSorted(rn, info_new, afi, SAFI_MPLS_VPN); | |
3635 | rfapiItBiIndexAdd(rn, info_new); | |
3636 | if (!rfapiGetUnAddrOfVpnBi(info_new, NULL)) { | |
3637 | if (VALID_INTERIOR_TYPE(info_new->type)) | |
3638 | RFAPI_MONITOR_EXTERIOR(rn)->valid_interior_count++; | |
1defdda8 | 3639 | SET_FLAG(info_new->flags, BGP_PATH_VALID); |
d62a17ae | 3640 | } |
3641 | RFAPI_UPDATE_ITABLE_COUNT(info_new, import_table, afi, 1); | |
3642 | vnc_import_bgp_exterior_add_route_interior(bgp, import_table, rn, | |
3643 | info_new); | |
3644 | ||
3645 | if (import_table == bgp->rfapi->it_ce) | |
3646 | vnc_direct_bgp_add_route_ce(bgp, rn, info_new); | |
3647 | ||
3648 | if (VNC_DEBUG(VERBOSE)) { | |
3649 | vnc_zlog_debug_verbose("%s: showing IT node", __func__); | |
3650 | rfapiShowItNode(NULL, rn); /* debug */ | |
3651 | } | |
3652 | ||
3653 | rfapiMonitorEncapAdd(import_table, &vn_prefix, rn, info_new); | |
3654 | ||
3655 | if (!rfapiGetUnAddrOfVpnBi(info_new, &un_prefix)) { | |
3656 | ||
3657 | /* | |
3658 | * if we have a valid UN address (either via Encap route | |
3659 | * or via tunnel attribute), then we should attempt | |
3660 | * to move any monitors at less-specific nodes to this node | |
3661 | */ | |
3662 | rfapiMonitorMoveLonger(rn); | |
3663 | ||
3664 | un_prefix_valid = 1; | |
3665 | } | |
3666 | ||
3667 | /* | |
3668 | * 101129 Enhancement: if we add a route (implication: it is not | |
3669 | * in holddown), delete all other routes from this nve at this | |
3670 | * node that are in holddown, regardless of peer. | |
3671 | * | |
3672 | * Reasons it's OK to do that: | |
3673 | * | |
3674 | * - if the holddown route being deleted originally came from BGP VPN, | |
3675 | * it is already gone from BGP (implication of holddown), so there | |
3676 | * won't be any added inconsistency with the BGP RIB. | |
3677 | * | |
3678 | * - once a fresh route is added at a prefix, any routes in holddown | |
3679 | * at that prefix will not show up in RFP responses, so deleting | |
3680 | * the holddown routes won't affect the contents of responses. | |
3681 | * | |
3682 | * - lifetimes are supposed to be consistent, so there should not | |
3683 | * be a case where the fresh route has a shorter lifetime than | |
3684 | * the holddown route, so we don't expect the fresh route to | |
3685 | * disappear and complete its holddown time before the existing | |
3686 | * holddown routes time out. Therefore, we won't have a situation | |
3687 | * where we expect the existing holddown routes to be hidden and | |
3688 | * then to reappear sometime later (as holddown routes) in a | |
3689 | * RFP response. | |
3690 | * | |
3691 | * Among other things, this would enable us to skirt the problem | |
3692 | * of local holddown routes that refer to NVE descriptors that | |
3693 | * have already been closed (if the same NVE triggers a subsequent | |
3694 | * rfapi_open(), the new peer is different and doesn't match the | |
3695 | * peer of the holddown route, so the stale holddown route still | |
3696 | * hangs around until it times out instead of just being replaced | |
3697 | * by the fresh route). | |
3698 | */ | |
3699 | /* | |
40381db7 | 3700 | * We know that the new bpi will have been inserted before any routes |
d62a17ae | 3701 | * in holddown, so we can skip any that came before it |
3702 | */ | |
40381db7 | 3703 | for (bpi = info_new->next; bpi; bpi = next) { |
d62a17ae | 3704 | |
3705 | struct prefix pfx_vn; | |
3706 | struct prefix pfx_un; | |
3707 | int un_match = 0; | |
3708 | int remote_peer_match = 0; | |
3709 | ||
40381db7 | 3710 | next = bpi->next; |
d62a17ae | 3711 | |
3712 | /* | |
3713 | * Must be holddown | |
3714 | */ | |
40381db7 | 3715 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) |
d62a17ae | 3716 | continue; |
3717 | ||
3718 | /* | |
3719 | * Must match VN address (nexthop of VPN route) | |
3720 | */ | |
40381db7 | 3721 | if (rfapiGetNexthop(bpi->attr, &pfx_vn)) |
d62a17ae | 3722 | continue; |
3723 | if (!prefix_same(&pfx_vn, &vn_prefix)) | |
3724 | continue; | |
3725 | ||
3726 | if (un_prefix_valid && /* new route UN addr */ | |
40381db7 | 3727 | !rfapiGetUnAddrOfVpnBi(bpi, &pfx_un) |
d62a17ae | 3728 | && /* old route UN addr */ |
3729 | prefix_same(&pfx_un, &un_prefix)) { /* compare */ | |
3730 | un_match = 1; | |
3731 | } | |
40381db7 DS |
3732 | if (!RFAPI_LOCAL_BI(bpi) && !RFAPI_LOCAL_BI(info_new) |
3733 | && sockunion_same(&bpi->peer->su, &info_new->peer->su)) { | |
d62a17ae | 3734 | /* old & new are both remote, same peer */ |
3735 | remote_peer_match = 1; | |
3736 | } | |
3737 | ||
80c6a472 | 3738 | if (!un_match && !remote_peer_match) |
d62a17ae | 3739 | continue; |
3740 | ||
3741 | vnc_zlog_debug_verbose( | |
40381db7 | 3742 | "%s: removing holddown bpi matching NVE of new route", |
d62a17ae | 3743 | __func__); |
40381db7 | 3744 | if (bpi->extra->vnc.import.timer) { |
c3aaa89a | 3745 | struct rfapi_withdraw *wcb = |
e16d030c | 3746 | EVENT_ARG(bpi->extra->vnc.import.timer); |
d62a17ae | 3747 | |
3748 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
e16d030c | 3749 | EVENT_OFF(bpi->extra->vnc.import.timer); |
d62a17ae | 3750 | } |
40381db7 | 3751 | rfapiExpireVpnNow(import_table, rn, bpi, 0); |
d62a17ae | 3752 | } |
3753 | ||
3754 | if (!original_had_routes) { | |
3755 | /* | |
3756 | * We went from 0 usable routes to 1 usable route. Perform the | |
3757 | * "Adding a Route" export process. | |
3758 | */ | |
3759 | vnc_direct_bgp_add_prefix(bgp, import_table, rn); | |
3760 | vnc_zebra_add_prefix(bgp, import_table, rn); | |
3761 | } else { | |
3762 | /* | |
3763 | * Check for nexthop change event | |
3764 | * Note: the prefix_same() test below detects two situations: | |
3765 | * 1. route is replaced, new route has different nexthop | |
3766 | * 2. new route is added (original_nexthop is 0) | |
3767 | */ | |
3768 | struct prefix new_nexthop; | |
3769 | ||
3770 | rfapiGetNexthop(attr, &new_nexthop); | |
3771 | if (!prefix_same(&original_nexthop, &new_nexthop)) { | |
3772 | /* | |
3773 | * nexthop change event | |
3774 | * vnc_direct_bgp_add_prefix() will recompute VN addr | |
3775 | * ecommunity | |
3776 | */ | |
3777 | vnc_direct_bgp_add_prefix(bgp, import_table, rn); | |
3778 | } | |
3779 | } | |
3780 | ||
3781 | if (!(bgp->rfapi_cfg->flags & BGP_VNC_CONFIG_CALLBACK_DISABLE)) { | |
fe08ba7e | 3782 | for (n = rn; n; n = agg_node_parent(n)) { |
d62a17ae | 3783 | // rfapiDoRouteCallback(import_table, n, NULL); |
3784 | } | |
3785 | rfapiMonitorItNodeChanged(import_table, rn, NULL); | |
3786 | } | |
3787 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, 0); | |
3788 | VNC_ITRCCK; | |
65efcfce LB |
3789 | } |
3790 | ||
21cf6b21 VJ |
3791 | static void rfapiBgpInfoFilteredImportBadSafi( |
3792 | struct rfapi_import_table *import_table, int action, struct peer *peer, | |
3793 | void *rfd, /* set for looped back routes */ | |
5a1ae2c2 DS |
3794 | const struct prefix *p, |
3795 | const struct prefix *aux_prefix, /* AFI_L2VPN: optional IP */ | |
21cf6b21 | 3796 | afi_t afi, struct prefix_rd *prd, |
9b6d8fcf | 3797 | struct attr *attr, /* part of bgp_path_info */ |
5a1ae2c2 | 3798 | uint8_t type, /* part of bgp_path_info */ |
9b6d8fcf DS |
3799 | uint8_t sub_type, /* part of bgp_path_info */ |
3800 | uint32_t *label) /* part of bgp_path_info */ | |
21cf6b21 VJ |
3801 | { |
3802 | vnc_zlog_debug_verbose("%s: Error, bad safi", __func__); | |
3803 | } | |
3804 | ||
65efcfce | 3805 | static rfapi_bi_filtered_import_f * |
d62a17ae | 3806 | rfapiBgpInfoFilteredImportFunction(safi_t safi) |
65efcfce | 3807 | { |
d62a17ae | 3808 | switch (safi) { |
3809 | case SAFI_MPLS_VPN: | |
3810 | return rfapiBgpInfoFilteredImportVPN; | |
3811 | ||
3812 | case SAFI_ENCAP: | |
3813 | return rfapiBgpInfoFilteredImportEncap; | |
5c525538 | 3814 | |
58cf0823 DS |
3815 | case SAFI_UNSPEC: |
3816 | case SAFI_UNICAST: | |
3817 | case SAFI_MULTICAST: | |
3818 | case SAFI_EVPN: | |
3819 | case SAFI_LABELED_UNICAST: | |
3820 | case SAFI_FLOWSPEC: | |
3821 | case SAFI_MAX: | |
5c525538 | 3822 | /* not expected */ |
1c50c1c0 | 3823 | flog_err(EC_LIB_DEVELOPMENT, "%s: bad safi %d", __func__, safi); |
21cf6b21 | 3824 | return rfapiBgpInfoFilteredImportBadSafi; |
d62a17ae | 3825 | } |
58cf0823 DS |
3826 | |
3827 | assert(!"Reached end of function when we were not expecting to"); | |
65efcfce LB |
3828 | } |
3829 | ||
d62a17ae | 3830 | void rfapiProcessUpdate(struct peer *peer, |
3831 | void *rfd, /* set when looped from RFP/RFAPI */ | |
5a1ae2c2 | 3832 | const struct prefix *p, struct prefix_rd *prd, |
d7c0a89a QY |
3833 | struct attr *attr, afi_t afi, safi_t safi, uint8_t type, |
3834 | uint8_t sub_type, uint32_t *label) | |
65efcfce | 3835 | { |
d62a17ae | 3836 | struct bgp *bgp; |
3837 | struct rfapi *h; | |
3838 | struct rfapi_import_table *it; | |
3839 | int has_ip_route = 1; | |
3840 | uint32_t lni = 0; | |
3841 | ||
3842 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
3843 | assert(bgp); | |
3844 | ||
3845 | h = bgp->rfapi; | |
3846 | assert(h); | |
3847 | ||
3848 | /* | |
3849 | * look at high-order byte of RD. FF means MAC | |
3850 | * address is present (VNC L2VPN) | |
3851 | */ | |
3852 | if ((safi == SAFI_MPLS_VPN) | |
3853 | && (decode_rd_type(prd->val) == RD_TYPE_VNC_ETH)) { | |
3854 | struct prefix pfx_mac_buf; | |
3855 | struct prefix pfx_nexthop_buf; | |
3856 | int rc; | |
3857 | ||
3858 | /* | |
3859 | * Set flag if prefix and nexthop are the same - don't | |
3860 | * add the route to normal IP-based import tables | |
3861 | */ | |
3862 | if (!rfapiGetNexthop(attr, &pfx_nexthop_buf)) { | |
3863 | if (!prefix_cmp(&pfx_nexthop_buf, p)) { | |
3864 | has_ip_route = 0; | |
3865 | } | |
3866 | } | |
3867 | ||
3868 | memset(&pfx_mac_buf, 0, sizeof(pfx_mac_buf)); | |
3869 | pfx_mac_buf.family = AF_ETHERNET; | |
3870 | pfx_mac_buf.prefixlen = 48; | |
3871 | memcpy(&pfx_mac_buf.u.prefix_eth.octet, prd->val + 2, 6); | |
3872 | ||
3873 | /* | |
3874 | * Find rt containing LNI (Logical Network ID), which | |
3875 | * _should_ always be present when mac address is present | |
3876 | */ | |
b53e67a3 | 3877 | rc = rfapiEcommunityGetLNI(bgp_attr_get_ecommunity(attr), &lni); |
d62a17ae | 3878 | |
3879 | vnc_zlog_debug_verbose( | |
3880 | "%s: rfapiEcommunityGetLNI returned %d, lni=%d, attr=%p", | |
3881 | __func__, rc, lni, attr); | |
8cea9547 | 3882 | if (!rc) { |
d62a17ae | 3883 | it = rfapiMacImportTableGet(bgp, lni); |
3884 | ||
3885 | rfapiBgpInfoFilteredImportVPN( | |
3886 | it, FIF_ACTION_UPDATE, peer, rfd, | |
3887 | &pfx_mac_buf, /* prefix */ | |
3888 | p, /* aux prefix: IP addr */ | |
3889 | AFI_L2VPN, prd, attr, type, sub_type, label); | |
3890 | } | |
3891 | } | |
3892 | ||
3893 | if (!has_ip_route) | |
3894 | return; | |
3895 | ||
3896 | /* | |
3897 | * Iterate over all import tables; do a filtered import | |
3898 | * for the afi/safi combination | |
3899 | */ | |
3900 | for (it = h->imports; it; it = it->next) { | |
3901 | (*rfapiBgpInfoFilteredImportFunction(safi))( | |
3902 | it, FIF_ACTION_UPDATE, peer, rfd, p, /* prefix */ | |
3903 | NULL, afi, prd, attr, type, sub_type, label); | |
3904 | } | |
3905 | ||
3906 | if (safi == SAFI_MPLS_VPN) { | |
3907 | vnc_direct_bgp_rh_add_route(bgp, afi, p, peer, attr); | |
d62a17ae | 3908 | rfapiBgpInfoFilteredImportVPN( |
3909 | bgp->rfapi->it_ce, FIF_ACTION_UPDATE, peer, rfd, | |
3910 | p, /* prefix */ | |
3911 | NULL, afi, prd, attr, type, sub_type, label); | |
3912 | } | |
65efcfce LB |
3913 | } |
3914 | ||
3915 | ||
5a1ae2c2 | 3916 | void rfapiProcessWithdraw(struct peer *peer, void *rfd, const struct prefix *p, |
d62a17ae | 3917 | struct prefix_rd *prd, struct attr *attr, afi_t afi, |
d7c0a89a | 3918 | safi_t safi, uint8_t type, int kill) |
65efcfce | 3919 | { |
d62a17ae | 3920 | struct bgp *bgp; |
3921 | struct rfapi *h; | |
3922 | struct rfapi_import_table *it; | |
3923 | ||
3924 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
3925 | assert(bgp); | |
3926 | ||
3927 | h = bgp->rfapi; | |
3928 | assert(h); | |
3929 | ||
3930 | /* | |
3931 | * look at high-order byte of RD. FF means MAC | |
3932 | * address is present (VNC L2VPN) | |
3933 | */ | |
3934 | if (h->import_mac != NULL && safi == SAFI_MPLS_VPN | |
3935 | && decode_rd_type(prd->val) == RD_TYPE_VNC_ETH) { | |
3936 | struct prefix pfx_mac_buf; | |
3937 | void *cursor = NULL; | |
3938 | int rc; | |
3939 | ||
3940 | memset(&pfx_mac_buf, 0, sizeof(pfx_mac_buf)); | |
3941 | pfx_mac_buf.family = AF_ETHERNET; | |
3942 | pfx_mac_buf.prefixlen = 48; | |
3943 | memcpy(&pfx_mac_buf.u.prefix_eth, prd->val + 2, 6); | |
3944 | ||
3945 | /* | |
3946 | * withdraw does not contain attrs, so we don't have | |
3947 | * access to the route's LNI, which would ordinarily | |
3948 | * select the specific mac-based import table. Instead, | |
3949 | * we must iterate over all mac-based tables and rely | |
3950 | * on the RD to match. | |
3951 | * | |
3952 | * If this approach is too slow, add an index where | |
3953 | * key is {RD, peer} and value is the import table | |
3954 | */ | |
3955 | for (rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
3956 | &cursor); | |
3957 | rc == 0; rc = skiplist_next(h->import_mac, NULL, | |
3958 | (void **)&it, &cursor)) { | |
65efcfce | 3959 | |
1e20238a | 3960 | #ifdef DEBUG_L2_EXTRA |
d62a17ae | 3961 | vnc_zlog_debug_verbose( |
3962 | "%s: calling rfapiBgpInfoFilteredImportVPN(it=%p, afi=AFI_L2VPN)", | |
3963 | __func__, it); | |
65efcfce LB |
3964 | #endif |
3965 | ||
d62a17ae | 3966 | rfapiBgpInfoFilteredImportVPN( |
3967 | it, | |
3968 | (kill ? FIF_ACTION_KILL : FIF_ACTION_WITHDRAW), | |
3969 | peer, rfd, &pfx_mac_buf, /* prefix */ | |
3970 | p, /* aux_prefix: IP */ | |
3971 | AFI_L2VPN, prd, attr, type, 0, | |
3972 | NULL); /* sub_type & label unused for withdraw | |
9d303b37 | 3973 | */ |
d62a17ae | 3974 | } |
3975 | } | |
3976 | ||
3977 | /* | |
3978 | * XXX For the case where the withdraw involves an L2 | |
3979 | * route with no IP information, we rely on the lack | |
3980 | * of RT-list intersection to filter out the withdraw | |
3981 | * from the IP-based import tables below | |
3982 | */ | |
3983 | ||
3984 | /* | |
3985 | * Iterate over all import tables; do a filtered import | |
3986 | * for the afi/safi combination | |
3987 | */ | |
3988 | ||
3989 | for (it = h->imports; it; it = it->next) { | |
3990 | (*rfapiBgpInfoFilteredImportFunction(safi))( | |
3991 | it, (kill ? FIF_ACTION_KILL : FIF_ACTION_WITHDRAW), | |
3992 | peer, rfd, p, /* prefix */ | |
3993 | NULL, afi, prd, attr, type, 0, | |
3994 | NULL); /* sub_type & label unused for withdraw */ | |
3995 | } | |
3996 | ||
3997 | /* TBD the deletion should happen after the lifetime expires */ | |
3998 | if (safi == SAFI_MPLS_VPN) | |
3999 | vnc_direct_bgp_rh_del_route(bgp, afi, p, peer); | |
4000 | ||
4001 | if (safi == SAFI_MPLS_VPN) { | |
4002 | rfapiBgpInfoFilteredImportVPN( | |
4003 | bgp->rfapi->it_ce, | |
4004 | (kill ? FIF_ACTION_KILL : FIF_ACTION_WITHDRAW), peer, | |
4005 | rfd, p, /* prefix */ | |
4006 | NULL, afi, prd, attr, type, 0, | |
4007 | NULL); /* sub_type & label unused for withdraw */ | |
4008 | } | |
65efcfce LB |
4009 | } |
4010 | ||
4011 | /* | |
4012 | * TBD optimized withdraw timer algorithm for case of many | |
4013 | * routes expiring at the same time due to peer drop. | |
4014 | */ | |
4015 | /* | |
40381db7 | 4016 | * 1. Visit all BPIs in all ENCAP import tables. |
65efcfce | 4017 | * |
40381db7 DS |
4018 | * a. If a bpi's peer is the failed peer, remove the bpi. |
4019 | * b. If the removed ENCAP bpi was first in the list of | |
4020 | * BPIs at this ENCAP node, loop over all monitors | |
65efcfce LB |
4021 | * at this node: |
4022 | * | |
4023 | * (1) for each ENCAP monitor, loop over all its | |
4024 | * VPN node monitors and set their RFAPI_MON_FLAG_NEEDCALLBACK | |
4025 | * flags. | |
4026 | * | |
40381db7 DS |
4027 | * 2. Visit all BPIs in all VPN import tables. |
4028 | * a. If a bpi's peer is the failed peer, remove the bpi. | |
65efcfce LB |
4029 | * b. loop over all the VPN node monitors and set their |
4030 | * RFAPI_MON_FLAG_NEEDCALLBACK flags | |
40381db7 | 4031 | * c. If there are no BPIs left at this VPN node, |
65efcfce LB |
4032 | * |
4033 | */ | |
4034 | ||
4035 | ||
4036 | /* surprise, this gets called from peer_delete(), from rfapi_close() */ | |
d62a17ae | 4037 | static void rfapiProcessPeerDownRt(struct peer *peer, |
4038 | struct rfapi_import_table *import_table, | |
4039 | afi_t afi, safi_t safi) | |
65efcfce | 4040 | { |
fe08ba7e | 4041 | struct agg_node *rn; |
40381db7 | 4042 | struct bgp_path_info *bpi; |
58cf0823 | 4043 | struct agg_table *rt = NULL; |
e6685141 | 4044 | void (*timer_service_func)(struct event *) = NULL; |
d62a17ae | 4045 | |
4046 | assert(afi == AFI_IP || afi == AFI_IP6); | |
4047 | ||
4048 | VNC_ITRCCK; | |
4049 | ||
4050 | switch (safi) { | |
4051 | case SAFI_MPLS_VPN: | |
4052 | rt = import_table->imported_vpn[afi]; | |
4053 | timer_service_func = rfapiWithdrawTimerVPN; | |
4054 | break; | |
4055 | case SAFI_ENCAP: | |
4056 | rt = import_table->imported_encap[afi]; | |
4057 | timer_service_func = rfapiWithdrawTimerEncap; | |
4058 | break; | |
58cf0823 DS |
4059 | case SAFI_UNSPEC: |
4060 | case SAFI_UNICAST: | |
4061 | case SAFI_MULTICAST: | |
4062 | case SAFI_EVPN: | |
4063 | case SAFI_LABELED_UNICAST: | |
4064 | case SAFI_FLOWSPEC: | |
4065 | case SAFI_MAX: | |
21fe4510 QY |
4066 | /* Suppress uninitialized variable warning */ |
4067 | rt = NULL; | |
4068 | timer_service_func = NULL; | |
d62a17ae | 4069 | assert(0); |
4070 | } | |
4071 | ||
fe08ba7e | 4072 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
40381db7 DS |
4073 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
4074 | if (bpi->peer == peer) { | |
d62a17ae | 4075 | |
40381db7 | 4076 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
d62a17ae | 4077 | /* already in holddown, skip */ |
4078 | continue; | |
4079 | } | |
4080 | ||
4081 | if (safi == SAFI_MPLS_VPN) { | |
4082 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 4083 | bpi, import_table, afi, -1); |
d62a17ae | 4084 | import_table->holddown_count[afi] += 1; |
4085 | } | |
40381db7 | 4086 | rfapiBiStartWithdrawTimer(import_table, rn, bpi, |
d62a17ae | 4087 | afi, safi, |
4088 | timer_service_func); | |
4089 | } | |
4090 | } | |
4091 | } | |
4092 | VNC_ITRCCK; | |
65efcfce LB |
4093 | } |
4094 | ||
d62a17ae | 4095 | /* |
65efcfce LB |
4096 | * This gets called when a peer connection drops. We have to remove |
4097 | * all the routes from this peer. | |
4098 | * | |
4099 | * Current approach is crude. TBD Optimize by setting fewer timers and | |
4100 | * grouping withdrawn routes so we can generate callbacks more | |
4101 | * efficiently. | |
4102 | */ | |
d62a17ae | 4103 | void rfapiProcessPeerDown(struct peer *peer) |
65efcfce | 4104 | { |
d62a17ae | 4105 | struct bgp *bgp; |
4106 | struct rfapi *h; | |
4107 | struct rfapi_import_table *it; | |
4108 | ||
4109 | /* | |
4110 | * If this peer is a "dummy" peer structure atached to a RFAPI | |
4111 | * nve_descriptor, we don't need to walk the import tables | |
4112 | * because the routes are already withdrawn by rfapi_close() | |
4113 | */ | |
4114 | if (CHECK_FLAG(peer->flags, PEER_FLAG_IS_RFAPI_HD)) | |
4115 | return; | |
4116 | ||
4117 | /* | |
40381db7 DS |
4118 | * 1. Visit all BPIs in all ENCAP import tables. |
4119 | * Start withdraw timer on the BPIs that match peer. | |
d62a17ae | 4120 | * |
40381db7 DS |
4121 | * 2. Visit All BPIs in all VPN import tables. |
4122 | * Start withdraw timer on the BPIs that match peer. | |
d62a17ae | 4123 | */ |
4124 | ||
4125 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
4126 | if (!bgp) | |
4127 | return; | |
4128 | ||
4129 | h = bgp->rfapi; | |
4130 | assert(h); | |
4131 | ||
4132 | for (it = h->imports; it; it = it->next) { | |
4133 | rfapiProcessPeerDownRt(peer, it, AFI_IP, SAFI_ENCAP); | |
4134 | rfapiProcessPeerDownRt(peer, it, AFI_IP6, SAFI_ENCAP); | |
4135 | rfapiProcessPeerDownRt(peer, it, AFI_IP, SAFI_MPLS_VPN); | |
4136 | rfapiProcessPeerDownRt(peer, it, AFI_IP6, SAFI_MPLS_VPN); | |
4137 | } | |
4138 | ||
4139 | if (h->it_ce) { | |
4140 | rfapiProcessPeerDownRt(peer, h->it_ce, AFI_IP, SAFI_MPLS_VPN); | |
4141 | rfapiProcessPeerDownRt(peer, h->it_ce, AFI_IP6, SAFI_MPLS_VPN); | |
4142 | } | |
65efcfce LB |
4143 | } |
4144 | ||
4145 | /* | |
4146 | * Import an entire RIB (for an afi/safi) to an import table RIB, | |
4147 | * filtered according to the import table's RT list | |
4148 | * | |
4149 | * TBD: does this function need additions to match rfapiProcessUpdate() | |
d62a17ae | 4150 | * for, e.g., L2 handling? |
65efcfce | 4151 | */ |
d62a17ae | 4152 | static void rfapiBgpTableFilteredImport(struct bgp *bgp, |
4153 | struct rfapi_import_table *it, | |
4154 | afi_t afi, safi_t safi) | |
65efcfce | 4155 | { |
9bcb3eef DS |
4156 | struct bgp_dest *dest1; |
4157 | struct bgp_dest *dest2; | |
d62a17ae | 4158 | |
4159 | /* Only these SAFIs have 2-level RIBS */ | |
4160 | assert(safi == SAFI_MPLS_VPN || safi == SAFI_ENCAP); | |
4161 | ||
4162 | /* | |
4163 | * Now visit all the rd nodes and the nodes of all the | |
4164 | * route tables attached to them, and import the routes | |
4165 | * if they have matching route targets | |
4166 | */ | |
9bcb3eef DS |
4167 | for (dest1 = bgp_table_top(bgp->rib[afi][safi]); dest1; |
4168 | dest1 = bgp_route_next(dest1)) { | |
d62a17ae | 4169 | |
9bcb3eef | 4170 | if (bgp_dest_has_bgp_path_info_data(dest1)) { |
6f94b685 | 4171 | |
9bcb3eef DS |
4172 | for (dest2 = bgp_table_top( |
4173 | bgp_dest_get_bgp_table_info(dest1)); | |
4174 | dest2; dest2 = bgp_route_next(dest2)) { | |
d62a17ae | 4175 | |
40381db7 | 4176 | struct bgp_path_info *bpi; |
d62a17ae | 4177 | |
9bcb3eef | 4178 | for (bpi = bgp_dest_get_bgp_path_info(dest2); |
6f94b685 | 4179 | bpi; bpi = bpi->next) { |
d7c0a89a | 4180 | uint32_t label = 0; |
d62a17ae | 4181 | |
40381db7 | 4182 | if (CHECK_FLAG(bpi->flags, |
1defdda8 | 4183 | BGP_PATH_REMOVED)) |
d62a17ae | 4184 | continue; |
4185 | ||
40381db7 | 4186 | if (bpi->extra) |
d62a17ae | 4187 | label = decode_label( |
40381db7 | 4188 | &bpi->extra->label[0]); |
d62a17ae | 4189 | (*rfapiBgpInfoFilteredImportFunction( |
4190 | safi))( | |
4191 | it, /* which import table */ | |
40381db7 | 4192 | FIF_ACTION_UPDATE, bpi->peer, |
9bcb3eef DS |
4193 | NULL, |
4194 | bgp_dest_get_prefix(dest2), | |
d62a17ae | 4195 | NULL, afi, |
b54892e0 | 4196 | (struct prefix_rd *) |
9bcb3eef DS |
4197 | bgp_dest_get_prefix( |
4198 | dest1), | |
40381db7 DS |
4199 | bpi->attr, bpi->type, |
4200 | bpi->sub_type, &label); | |
d62a17ae | 4201 | } |
4202 | } | |
4203 | } | |
4204 | } | |
65efcfce LB |
4205 | } |
4206 | ||
4207 | ||
4208 | /* per-bgp-instance rfapi data */ | |
d62a17ae | 4209 | struct rfapi *bgp_rfapi_new(struct bgp *bgp) |
65efcfce | 4210 | { |
d62a17ae | 4211 | struct rfapi *h; |
e7038dde | 4212 | afi_t afi; |
d62a17ae | 4213 | struct rfapi_rfp_cfg *cfg = NULL; |
4214 | struct rfapi_rfp_cb_methods *cbm = NULL; | |
4215 | ||
4216 | assert(bgp->rfapi_cfg == NULL); | |
4217 | ||
9f5dc319 | 4218 | h = XCALLOC(MTYPE_RFAPI, sizeof(struct rfapi)); |
d62a17ae | 4219 | |
4220 | for (afi = AFI_IP; afi < AFI_MAX; afi++) { | |
fe08ba7e | 4221 | h->un[afi] = agg_table_init(); |
d62a17ae | 4222 | } |
4223 | ||
4224 | /* | |
4225 | * initialize the ce import table | |
4226 | */ | |
4227 | h->it_ce = XCALLOC(MTYPE_RFAPI_IMPORTTABLE, | |
4228 | sizeof(struct rfapi_import_table)); | |
fe08ba7e DS |
4229 | h->it_ce->imported_vpn[AFI_IP] = agg_table_init(); |
4230 | h->it_ce->imported_vpn[AFI_IP6] = agg_table_init(); | |
4231 | h->it_ce->imported_encap[AFI_IP] = agg_table_init(); | |
4232 | h->it_ce->imported_encap[AFI_IP6] = agg_table_init(); | |
d62a17ae | 4233 | rfapiBgpTableFilteredImport(bgp, h->it_ce, AFI_IP, SAFI_MPLS_VPN); |
4234 | rfapiBgpTableFilteredImport(bgp, h->it_ce, AFI_IP6, SAFI_MPLS_VPN); | |
4235 | ||
4236 | /* | |
4237 | * Set up work queue for deferred rfapi_close operations | |
4238 | */ | |
4239 | h->deferred_close_q = | |
4240 | work_queue_new(bm->master, "rfapi deferred close"); | |
4241 | h->deferred_close_q->spec.workfunc = rfapi_deferred_close_workfunc; | |
4242 | h->deferred_close_q->spec.data = h; | |
4243 | ||
4244 | h->rfp = rfp_start(bm->master, &cfg, &cbm); | |
4245 | bgp->rfapi_cfg = bgp_rfapi_cfg_new(cfg); | |
4246 | if (cbm != NULL) { | |
4247 | h->rfp_methods = *cbm; | |
4248 | } | |
4249 | return h; | |
65efcfce LB |
4250 | } |
4251 | ||
d62a17ae | 4252 | void bgp_rfapi_destroy(struct bgp *bgp, struct rfapi *h) |
65efcfce | 4253 | { |
e7038dde | 4254 | afi_t afi; |
0ae6124f | 4255 | |
d62a17ae | 4256 | if (bgp == NULL || h == NULL) |
4257 | return; | |
4258 | ||
4259 | if (h->resolve_nve_nexthop) { | |
4260 | skiplist_free(h->resolve_nve_nexthop); | |
4261 | h->resolve_nve_nexthop = NULL; | |
4262 | } | |
4263 | ||
cd886395 | 4264 | rfapiImportTableFlush(h->it_ce); |
d62a17ae | 4265 | |
4266 | if (h->import_mac) { | |
4267 | struct rfapi_import_table *it; | |
4268 | void *cursor; | |
4269 | int rc; | |
4270 | ||
9d303b37 DL |
4271 | for (cursor = NULL, |
4272 | rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4273 | &cursor); | |
d62a17ae | 4274 | !rc; rc = skiplist_next(h->import_mac, NULL, (void **)&it, |
4275 | &cursor)) { | |
4276 | ||
4277 | rfapiImportTableFlush(it); | |
4278 | XFREE(MTYPE_RFAPI_IMPORTTABLE, it); | |
4279 | } | |
4280 | skiplist_free(h->import_mac); | |
4281 | h->import_mac = NULL; | |
4282 | } | |
4283 | ||
e208c8f9 | 4284 | work_queue_free_and_null(&h->deferred_close_q); |
d62a17ae | 4285 | |
4286 | if (h->rfp != NULL) | |
4287 | rfp_stop(h->rfp); | |
0ae6124f LB |
4288 | |
4289 | for (afi = AFI_IP; afi < AFI_MAX; afi++) { | |
fe08ba7e | 4290 | agg_table_finish(h->un[afi]); |
0ae6124f LB |
4291 | } |
4292 | ||
d62a17ae | 4293 | XFREE(MTYPE_RFAPI_IMPORTTABLE, h->it_ce); |
4294 | XFREE(MTYPE_RFAPI, h); | |
65efcfce LB |
4295 | } |
4296 | ||
4297 | struct rfapi_import_table * | |
d62a17ae | 4298 | rfapiImportTableRefAdd(struct bgp *bgp, struct ecommunity *rt_import_list, |
4299 | struct rfapi_nve_group_cfg *rfg) | |
65efcfce | 4300 | { |
d62a17ae | 4301 | struct rfapi *h; |
4302 | struct rfapi_import_table *it; | |
4303 | afi_t afi; | |
4304 | ||
4305 | h = bgp->rfapi; | |
4306 | assert(h); | |
4307 | ||
4308 | for (it = h->imports; it; it = it->next) { | |
4309 | if (ecommunity_cmp(it->rt_import_list, rt_import_list)) | |
4310 | break; | |
4311 | } | |
4312 | ||
4313 | vnc_zlog_debug_verbose("%s: matched it=%p", __func__, it); | |
4314 | ||
4315 | if (!it) { | |
4316 | it = XCALLOC(MTYPE_RFAPI_IMPORTTABLE, | |
4317 | sizeof(struct rfapi_import_table)); | |
d62a17ae | 4318 | it->next = h->imports; |
4319 | h->imports = it; | |
4320 | ||
4321 | it->rt_import_list = ecommunity_dup(rt_import_list); | |
4322 | it->rfg = rfg; | |
4323 | it->monitor_exterior_orphans = | |
63265b5c | 4324 | skiplist_new(0, NULL, prefix_free_lists); |
d62a17ae | 4325 | |
4326 | /* | |
4327 | * fill import route tables from RIBs | |
4328 | * | |
4329 | * Potential area for optimization. If this occurs when | |
4330 | * tables are large (e.g., the operator adds a nve group | |
4331 | * with a new RT list to a running system), it could take | |
4332 | * a while. | |
4333 | * | |
4334 | */ | |
4335 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
4336 | ||
fe08ba7e DS |
4337 | it->imported_vpn[afi] = agg_table_init(); |
4338 | it->imported_encap[afi] = agg_table_init(); | |
d62a17ae | 4339 | |
4340 | rfapiBgpTableFilteredImport(bgp, it, afi, | |
4341 | SAFI_MPLS_VPN); | |
4342 | rfapiBgpTableFilteredImport(bgp, it, afi, SAFI_ENCAP); | |
4343 | ||
4344 | vnc_import_bgp_exterior_redist_enable_it(bgp, afi, it); | |
4345 | } | |
4346 | } | |
4347 | ||
4348 | it->refcount += 1; | |
4349 | ||
4350 | return it; | |
65efcfce LB |
4351 | } |
4352 | ||
4353 | /* | |
4354 | * skiplist element free function | |
4355 | */ | |
d62a17ae | 4356 | static void delete_rem_pfx_na_free(void *na) |
65efcfce | 4357 | { |
d62a17ae | 4358 | uint32_t *pCounter = ((struct rfapi_nve_addr *)na)->info; |
65efcfce | 4359 | |
d62a17ae | 4360 | *pCounter += 1; |
4361 | XFREE(MTYPE_RFAPI_NVE_ADDR, na); | |
65efcfce LB |
4362 | } |
4363 | ||
4364 | /* | |
4365 | * Common deleter for IP and MAC import tables | |
4366 | */ | |
d62a17ae | 4367 | static void rfapiDeleteRemotePrefixesIt( |
4368 | struct bgp *bgp, struct rfapi_import_table *it, struct prefix *un, | |
4369 | struct prefix *vn, struct prefix *p, int delete_active, | |
4370 | int delete_holddown, uint32_t *pARcount, uint32_t *pAHcount, | |
4371 | uint32_t *pHRcount, uint32_t *pHHcount, | |
4372 | struct skiplist *uniq_active_nves, struct skiplist *uniq_holddown_nves) | |
65efcfce | 4373 | { |
d62a17ae | 4374 | afi_t afi; |
65efcfce | 4375 | |
1e20238a | 4376 | #ifdef DEBUG_L2_EXTRA |
d62a17ae | 4377 | { |
872ed4c7 | 4378 | char buf_pfx[PREFIX_STRLEN]; |
d62a17ae | 4379 | |
4380 | if (p) { | |
872ed4c7 | 4381 | prefix2str(p, buf_pfx, sizeof(buf_pfx)); |
d62a17ae | 4382 | } else { |
4383 | buf_pfx[0] = '*'; | |
4384 | buf_pfx[1] = 0; | |
4385 | } | |
4386 | ||
4387 | vnc_zlog_debug_verbose( | |
4388 | "%s: entry, p=%s, delete_active=%d, delete_holddown=%d", | |
4389 | __func__, buf_pfx, delete_active, delete_holddown); | |
4390 | } | |
65efcfce LB |
4391 | #endif |
4392 | ||
d62a17ae | 4393 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { |
4394 | ||
fe08ba7e DS |
4395 | struct agg_table *rt; |
4396 | struct agg_node *rn; | |
d62a17ae | 4397 | |
4398 | if (p && (family2afi(p->family) != afi)) { | |
4399 | continue; | |
4400 | } | |
4401 | ||
4402 | rt = it->imported_vpn[afi]; | |
4403 | if (!rt) | |
4404 | continue; | |
4405 | ||
4406 | vnc_zlog_debug_verbose("%s: scanning rt for afi=%d", __func__, | |
4407 | afi); | |
4408 | ||
fe08ba7e | 4409 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
40381db7 | 4410 | struct bgp_path_info *bpi; |
4b7e6066 | 4411 | struct bgp_path_info *next; |
26a3ffd6 | 4412 | const struct prefix *rn_p = agg_node_get_prefix(rn); |
d62a17ae | 4413 | |
2dbe669b DA |
4414 | if (p && VNC_DEBUG(IMPORT_DEL_REMOTE)) |
4415 | vnc_zlog_debug_any("%s: want %pFX, have %pRN", | |
4416 | __func__, p, rn); | |
d62a17ae | 4417 | |
26a3ffd6 | 4418 | if (p && prefix_cmp(p, rn_p)) |
d62a17ae | 4419 | continue; |
4420 | ||
26a3ffd6 | 4421 | vnc_zlog_debug_verbose("%s: rn pfx=%pRN", __func__, rn); |
d62a17ae | 4422 | |
4423 | /* TBD is this valid for afi == AFI_L2VPN? */ | |
4424 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, 1); | |
4425 | ||
40381db7 DS |
4426 | for (bpi = rn->info; bpi; bpi = next) { |
4427 | next = bpi->next; | |
d62a17ae | 4428 | |
4429 | struct prefix qpt; | |
4430 | struct prefix qct; | |
4431 | int qpt_valid = 0; | |
4432 | int qct_valid = 0; | |
4433 | int is_active = 0; | |
4434 | ||
40381db7 DS |
4435 | vnc_zlog_debug_verbose("%s: examining bpi %p", |
4436 | __func__, bpi); | |
d62a17ae | 4437 | |
05864da7 DS |
4438 | if (!rfapiGetNexthop(bpi->attr, &qpt)) |
4439 | qpt_valid = 1; | |
4440 | ||
d62a17ae | 4441 | if (vn) { |
4442 | if (!qpt_valid | |
4443 | || !prefix_match(vn, &qpt)) { | |
1e20238a | 4444 | #ifdef DEBUG_L2_EXTRA |
d62a17ae | 4445 | vnc_zlog_debug_verbose( |
4446 | "%s: continue at vn && !qpt_valid || !prefix_match(vn, &qpt)", | |
4447 | __func__); | |
65efcfce | 4448 | #endif |
d62a17ae | 4449 | continue; |
4450 | } | |
4451 | } | |
65efcfce | 4452 | |
40381db7 | 4453 | if (!rfapiGetUnAddrOfVpnBi(bpi, &qct)) |
d62a17ae | 4454 | qct_valid = 1; |
65efcfce | 4455 | |
d62a17ae | 4456 | if (un) { |
4457 | if (!qct_valid | |
4458 | || !prefix_match(un, &qct)) { | |
1e20238a | 4459 | #ifdef DEBUG_L2_EXTRA |
d62a17ae | 4460 | vnc_zlog_debug_verbose( |
4461 | "%s: continue at un && !qct_valid || !prefix_match(un, &qct)", | |
4462 | __func__); | |
65efcfce | 4463 | #endif |
d62a17ae | 4464 | continue; |
4465 | } | |
4466 | } | |
4467 | ||
4468 | ||
4469 | /* | |
40381db7 | 4470 | * Blow bpi away |
d62a17ae | 4471 | */ |
4472 | /* | |
4473 | * If this route is waiting to be deleted | |
4474 | * because of | |
4475 | * a previous withdraw, we must cancel its | |
4476 | * timer. | |
4477 | */ | |
40381db7 | 4478 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
d62a17ae | 4479 | if (!delete_holddown) |
4480 | continue; | |
40381db7 | 4481 | if (bpi->extra->vnc.import.timer) { |
d62a17ae | 4482 | struct rfapi_withdraw *wcb = |
e16d030c | 4483 | EVENT_ARG( |
c3aaa89a DS |
4484 | bpi->extra->vnc |
4485 | .import | |
4486 | .timer); | |
d62a17ae | 4487 | |
4488 | wcb->import_table | |
4489 | ->holddown_count[afi] -= | |
4490 | 1; | |
4491 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 4492 | bpi, wcb->import_table, |
d62a17ae | 4493 | afi, 1); |
4494 | XFREE(MTYPE_RFAPI_WITHDRAW, | |
4495 | wcb); | |
e16d030c DS |
4496 | EVENT_OFF(bpi->extra->vnc.import |
4497 | .timer); | |
d62a17ae | 4498 | } |
4499 | } else { | |
4500 | if (!delete_active) | |
4501 | continue; | |
4502 | is_active = 1; | |
4503 | } | |
4504 | ||
4505 | vnc_zlog_debug_verbose( | |
40381db7 DS |
4506 | "%s: deleting bpi %p (qct_valid=%d, qpt_valid=%d, delete_holddown=%d, delete_active=%d)", |
4507 | __func__, bpi, qct_valid, qpt_valid, | |
d62a17ae | 4508 | delete_holddown, delete_active); |
4509 | ||
4510 | ||
4511 | /* | |
4512 | * add nve to list | |
4513 | */ | |
4514 | if (qct_valid && qpt_valid) { | |
4515 | ||
4516 | struct rfapi_nve_addr na; | |
4517 | struct rfapi_nve_addr *nap; | |
4518 | ||
4519 | memset(&na, 0, sizeof(na)); | |
4520 | assert(!rfapiQprefix2Raddr(&qct, | |
4521 | &na.un)); | |
4522 | assert(!rfapiQprefix2Raddr(&qpt, | |
4523 | &na.vn)); | |
4524 | ||
4525 | if (skiplist_search( | |
4526 | (is_active | |
4527 | ? uniq_active_nves | |
4528 | : uniq_holddown_nves), | |
4529 | &na, (void **)&nap)) { | |
4530 | char line[BUFSIZ]; | |
4531 | ||
4532 | nap = XCALLOC( | |
4533 | MTYPE_RFAPI_NVE_ADDR, | |
4534 | sizeof(struct | |
4535 | rfapi_nve_addr)); | |
d62a17ae | 4536 | *nap = na; |
4537 | nap->info = is_active | |
4538 | ? pAHcount | |
4539 | : pHHcount; | |
4540 | skiplist_insert( | |
4541 | (is_active | |
4542 | ? uniq_active_nves | |
4543 | : uniq_holddown_nves), | |
4544 | nap, nap); | |
4545 | ||
4546 | rfapiNveAddr2Str(nap, line, | |
4547 | BUFSIZ); | |
4548 | } | |
4549 | } | |
4550 | ||
26a3ffd6 | 4551 | vnc_direct_bgp_rh_del_route(bgp, afi, rn_p, |
40381db7 | 4552 | bpi->peer); |
d62a17ae | 4553 | |
40381db7 | 4554 | RFAPI_UPDATE_ITABLE_COUNT(bpi, it, afi, -1); |
d62a17ae | 4555 | it->holddown_count[afi] += 1; |
40381db7 | 4556 | rfapiExpireVpnNow(it, rn, bpi, 1); |
d62a17ae | 4557 | |
4558 | vnc_zlog_debug_verbose( | |
4559 | "%s: incrementing count (is_active=%d)", | |
4560 | __func__, is_active); | |
4561 | ||
4562 | if (is_active) | |
4563 | ++*pARcount; | |
4564 | else | |
4565 | ++*pHRcount; | |
4566 | } | |
4567 | } | |
4568 | } | |
65efcfce LB |
4569 | } |
4570 | ||
4571 | ||
4572 | /* | |
4573 | * For use by the "clear vnc prefixes" command | |
4574 | */ | |
4575 | /*------------------------------------------ | |
4576 | * rfapiDeleteRemotePrefixes | |
4577 | * | |
4578 | * UI helper: For use by the "clear vnc prefixes" command | |
4579 | * | |
d62a17ae | 4580 | * input: |
65efcfce LB |
4581 | * un if set, tunnel must match this prefix |
4582 | * vn if set, nexthop prefix must match this prefix | |
4583 | * p if set, prefix must match this prefix | |
5ff06872 | 4584 | * it if set, only look in this import table |
65efcfce LB |
4585 | * |
4586 | * output | |
4587 | * pARcount number of active routes deleted | |
4588 | * pAHcount number of active nves deleted | |
4589 | * pHRcount number of holddown routes deleted | |
4590 | * pHHcount number of holddown nves deleted | |
4591 | * | |
4592 | * return value: | |
4593 | * void | |
4594 | --------------------------------------------*/ | |
d62a17ae | 4595 | void rfapiDeleteRemotePrefixes(struct prefix *un, struct prefix *vn, |
4596 | struct prefix *p, | |
4597 | struct rfapi_import_table *arg_it, | |
4598 | int delete_active, int delete_holddown, | |
4599 | uint32_t *pARcount, uint32_t *pAHcount, | |
4600 | uint32_t *pHRcount, uint32_t *pHHcount) | |
65efcfce | 4601 | { |
d62a17ae | 4602 | struct bgp *bgp; |
4603 | struct rfapi *h; | |
4604 | struct rfapi_import_table *it; | |
4605 | uint32_t deleted_holddown_route_count = 0; | |
4606 | uint32_t deleted_active_route_count = 0; | |
4607 | uint32_t deleted_holddown_nve_count = 0; | |
4608 | uint32_t deleted_active_nve_count = 0; | |
4609 | struct skiplist *uniq_holddown_nves; | |
4610 | struct skiplist *uniq_active_nves; | |
4611 | ||
4612 | VNC_ITRCCK; | |
4613 | ||
4614 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
4615 | /* If no bgp instantiated yet, no vnc prefixes exist */ | |
4616 | if (!bgp) | |
4617 | return; | |
4618 | ||
4619 | h = bgp->rfapi; | |
4620 | assert(h); | |
4621 | ||
4622 | uniq_holddown_nves = | |
4623 | skiplist_new(0, rfapi_nve_addr_cmp, delete_rem_pfx_na_free); | |
4624 | uniq_active_nves = | |
4625 | skiplist_new(0, rfapi_nve_addr_cmp, delete_rem_pfx_na_free); | |
4626 | ||
4627 | /* | |
4628 | * Iterate over all import tables; do a filtered import | |
4629 | * for the afi/safi combination | |
4630 | */ | |
4631 | ||
4632 | if (arg_it) | |
4633 | it = arg_it; | |
4634 | else | |
4635 | it = h->imports; | |
4636 | for (; it;) { | |
4637 | ||
4638 | vnc_zlog_debug_verbose( | |
4639 | "%s: calling rfapiDeleteRemotePrefixesIt() on (IP) import %p", | |
4640 | __func__, it); | |
4641 | ||
4642 | rfapiDeleteRemotePrefixesIt( | |
4643 | bgp, it, un, vn, p, delete_active, delete_holddown, | |
4644 | &deleted_active_route_count, &deleted_active_nve_count, | |
4645 | &deleted_holddown_route_count, | |
4646 | &deleted_holddown_nve_count, uniq_active_nves, | |
4647 | uniq_holddown_nves); | |
4648 | ||
4649 | if (arg_it) | |
4650 | it = NULL; | |
4651 | else | |
4652 | it = it->next; | |
4653 | } | |
4654 | ||
4655 | /* | |
4656 | * Now iterate over L2 import tables | |
4657 | */ | |
4658 | if (h->import_mac && !(p && (p->family != AF_ETHERNET))) { | |
4659 | ||
4660 | void *cursor = NULL; | |
4661 | int rc; | |
4662 | ||
9d303b37 DL |
4663 | for (cursor = NULL, |
4664 | rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4665 | &cursor); | |
d62a17ae | 4666 | !rc; rc = skiplist_next(h->import_mac, NULL, (void **)&it, |
4667 | &cursor)) { | |
4668 | ||
4669 | vnc_zlog_debug_verbose( | |
4670 | "%s: calling rfapiDeleteRemotePrefixesIt() on import_mac %p", | |
4671 | __func__, it); | |
4672 | ||
4673 | rfapiDeleteRemotePrefixesIt( | |
4674 | bgp, it, un, vn, p, delete_active, | |
4675 | delete_holddown, &deleted_active_route_count, | |
4676 | &deleted_active_nve_count, | |
4677 | &deleted_holddown_route_count, | |
4678 | &deleted_holddown_nve_count, uniq_active_nves, | |
4679 | uniq_holddown_nves); | |
4680 | } | |
4681 | } | |
4682 | ||
4683 | /* | |
4684 | * our custom element freeing function above counts as it deletes | |
4685 | */ | |
4686 | skiplist_free(uniq_holddown_nves); | |
4687 | skiplist_free(uniq_active_nves); | |
4688 | ||
4689 | if (pARcount) | |
4690 | *pARcount = deleted_active_route_count; | |
4691 | if (pAHcount) | |
4692 | *pAHcount = deleted_active_nve_count; | |
4693 | if (pHRcount) | |
4694 | *pHRcount = deleted_holddown_route_count; | |
4695 | if (pHHcount) | |
4696 | *pHHcount = deleted_holddown_nve_count; | |
4697 | ||
4698 | VNC_ITRCCK; | |
65efcfce LB |
4699 | } |
4700 | ||
4701 | /*------------------------------------------ | |
4702 | * rfapiCountRemoteRoutes | |
4703 | * | |
4704 | * UI helper: count VRF routes from BGP side | |
4705 | * | |
d62a17ae | 4706 | * input: |
65efcfce LB |
4707 | * |
4708 | * output | |
4709 | * pALRcount count of active local routes | |
4710 | * pARRcount count of active remote routes | |
4711 | * pHRcount count of holddown routes | |
4712 | * pIRcount count of direct imported routes | |
4713 | * | |
4714 | * return value: | |
4715 | * void | |
4716 | --------------------------------------------*/ | |
d62a17ae | 4717 | void rfapiCountAllItRoutes(int *pALRcount, /* active local routes */ |
4718 | int *pARRcount, /* active remote routes */ | |
4719 | int *pHRcount, /* holddown routes */ | |
4720 | int *pIRcount) /* imported routes */ | |
65efcfce | 4721 | { |
d62a17ae | 4722 | struct bgp *bgp; |
4723 | struct rfapi *h; | |
4724 | struct rfapi_import_table *it; | |
4725 | afi_t afi; | |
4726 | ||
4727 | int total_active_local = 0; | |
4728 | int total_active_remote = 0; | |
4729 | int total_holddown = 0; | |
4730 | int total_imported = 0; | |
4731 | ||
4732 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
4733 | assert(bgp); | |
4734 | ||
4735 | h = bgp->rfapi; | |
4736 | assert(h); | |
4737 | ||
4738 | /* | |
4739 | * Iterate over all import tables; do a filtered import | |
4740 | * for the afi/safi combination | |
4741 | */ | |
4742 | ||
4743 | for (it = h->imports; it; it = it->next) { | |
4744 | ||
4745 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
4746 | ||
4747 | total_active_local += it->local_count[afi]; | |
4748 | total_active_remote += it->remote_count[afi]; | |
4749 | total_holddown += it->holddown_count[afi]; | |
4750 | total_imported += it->imported_count[afi]; | |
4751 | } | |
4752 | } | |
4753 | ||
4754 | void *cursor; | |
4755 | int rc; | |
4756 | ||
4757 | if (h->import_mac) { | |
9d303b37 DL |
4758 | for (cursor = NULL, |
4759 | rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4760 | &cursor); | |
d62a17ae | 4761 | !rc; rc = skiplist_next(h->import_mac, NULL, (void **)&it, |
4762 | &cursor)) { | |
4763 | ||
4764 | total_active_local += it->local_count[AFI_L2VPN]; | |
4765 | total_active_remote += it->remote_count[AFI_L2VPN]; | |
4766 | total_holddown += it->holddown_count[AFI_L2VPN]; | |
4767 | total_imported += it->imported_count[AFI_L2VPN]; | |
4768 | } | |
4769 | } | |
4770 | ||
4771 | ||
4772 | if (pALRcount) { | |
4773 | *pALRcount = total_active_local; | |
4774 | } | |
4775 | if (pARRcount) { | |
4776 | *pARRcount = total_active_remote; | |
4777 | } | |
4778 | if (pHRcount) { | |
4779 | *pHRcount = total_holddown; | |
4780 | } | |
4781 | if (pIRcount) { | |
4782 | *pIRcount = total_imported; | |
4783 | } | |
65efcfce LB |
4784 | } |
4785 | ||
4786 | /*------------------------------------------ | |
4787 | * rfapiGetHolddownFromLifetime | |
4788 | * | |
4789 | * calculate holddown value based on lifetime | |
4790 | * | |
d62a17ae | 4791 | * input: |
65efcfce LB |
4792 | * lifetime lifetime |
4793 | * | |
4794 | * return value: | |
4795 | * Holddown value based on lifetime, holddown_factor, | |
4796 | * and RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY | |
4797 | * | |
4798 | --------------------------------------------*/ | |
4799 | /* hold down time maxes out at RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY */ | |
d62a17ae | 4800 | uint32_t rfapiGetHolddownFromLifetime(uint32_t lifetime) |
65efcfce | 4801 | { |
d62a17ae | 4802 | uint32_t factor; |
4803 | struct bgp *bgp; | |
4804 | ||
4805 | bgp = bgp_get_default(); | |
4806 | if (bgp && bgp->rfapi_cfg) | |
4807 | factor = bgp->rfapi_cfg->rfp_cfg.holddown_factor; | |
4808 | else | |
4809 | factor = RFAPI_RFP_CFG_DEFAULT_HOLDDOWN_FACTOR; | |
4810 | ||
4811 | if (factor < 100 || lifetime < RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY) | |
4812 | lifetime = lifetime * factor / 100; | |
4813 | if (lifetime < RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY) | |
4814 | return lifetime; | |
4815 | else | |
4816 | return RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY; | |
65efcfce | 4817 | } |