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d62a17ae | 1 | /* |
9d303b37 DL |
2 | * |
3 | * Copyright 2009-2016, LabN Consulting, L.L.C. | |
4 | * | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version 2 | |
9 | * of the License, or (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along | |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
65efcfce LB |
20 | |
21 | /* | |
22 | * File: rfapi_import.c | |
23 | * Purpose: Handle import of routes from BGP to RFAPI | |
24 | */ | |
25 | ||
f8b6f499 LB |
26 | #include "lib/zebra.h" |
27 | #include "lib/prefix.h" | |
fe08ba7e | 28 | #include "lib/agg_table.h" |
f8b6f499 LB |
29 | #include "lib/vty.h" |
30 | #include "lib/memory.h" | |
31 | #include "lib/log.h" | |
32 | #include "lib/skiplist.h" | |
33 | #include "lib/thread.h" | |
937652c6 | 34 | #include "lib/stream.h" |
02705213 | 35 | #include "lib/lib_errors.h" |
65efcfce | 36 | |
f8b6f499 LB |
37 | #include "bgpd/bgpd.h" |
38 | #include "bgpd/bgp_ecommunity.h" | |
39 | #include "bgpd/bgp_attr.h" | |
40 | #include "bgpd/bgp_route.h" | |
d62a17ae | 41 | #include "bgpd/bgp_mplsvpn.h" /* prefix_rd2str() */ |
f8b6f499 | 42 | #include "bgpd/bgp_vnc_types.h" |
06b9f471 | 43 | #include "bgpd/bgp_rd.h" |
65efcfce | 44 | |
f8b6f499 LB |
45 | #include "bgpd/rfapi/rfapi.h" |
46 | #include "bgpd/rfapi/bgp_rfapi_cfg.h" | |
47 | #include "bgpd/rfapi/rfapi_backend.h" | |
48 | #include "bgpd/rfapi/rfapi_import.h" | |
49 | #include "bgpd/rfapi/rfapi_private.h" | |
50 | #include "bgpd/rfapi/rfapi_monitor.h" | |
51 | #include "bgpd/rfapi/rfapi_nve_addr.h" | |
52 | #include "bgpd/rfapi/rfapi_vty.h" | |
53 | #include "bgpd/rfapi/vnc_export_bgp.h" | |
54 | #include "bgpd/rfapi/vnc_export_bgp_p.h" | |
55 | #include "bgpd/rfapi/vnc_zebra.h" | |
56 | #include "bgpd/rfapi/vnc_import_bgp.h" | |
57 | #include "bgpd/rfapi/vnc_import_bgp_p.h" | |
58 | #include "bgpd/rfapi/rfapi_rib.h" | |
59 | #include "bgpd/rfapi/rfapi_encap_tlv.h" | |
60 | #include "bgpd/rfapi/vnc_debug.h" | |
65efcfce LB |
61 | |
62 | #ifdef HAVE_GLIBC_BACKTRACE | |
63 | /* for backtrace and friends */ | |
64 | #include <execinfo.h> | |
65 | #endif /* HAVE_GLIBC_BACKTRACE */ | |
66 | ||
67 | #undef DEBUG_MONITOR_MOVE_SHORTER | |
68 | #undef DEBUG_RETURNED_NHL | |
69 | #undef DEBUG_ROUTE_COUNTERS | |
70 | #undef DEBUG_ENCAP_MONITOR | |
71 | #undef DEBUG_L2_EXTRA | |
72 | #undef DEBUG_IT_NODES | |
73 | #undef DEBUG_BI_SEARCH | |
74 | ||
75 | /* | |
76 | * Allocated for each withdraw timer instance; freed when the timer | |
77 | * expires or is canceled | |
78 | */ | |
d62a17ae | 79 | struct rfapi_withdraw { |
80 | struct rfapi_import_table *import_table; | |
fe08ba7e | 81 | struct agg_node *node; |
4b7e6066 | 82 | struct bgp_path_info *info; |
d62a17ae | 83 | safi_t safi; /* used only for bulk operations */ |
84 | /* | |
85 | * For import table node reference count checking (i.e., debugging). | |
86 | * Normally when a timer expires, lockoffset should be 0. However, if | |
87 | * the timer expiration function is called directly (e.g., | |
88 | * rfapiExpireVpnNow), the node could be locked by a preceding | |
fe08ba7e DS |
89 | * agg_route_top() or agg_route_next() in a loop, so we need to pass |
90 | * this value in. | |
d62a17ae | 91 | */ |
92 | int lockoffset; | |
65efcfce LB |
93 | }; |
94 | ||
d62a17ae | 95 | /* |
65efcfce LB |
96 | * DEBUG FUNCTION |
97 | * It's evil and fiendish. It's compiler-dependent. | |
98 | * ? Might need LDFLAGS -rdynamic to produce all function names | |
99 | */ | |
d62a17ae | 100 | void rfapiDebugBacktrace(void) |
65efcfce LB |
101 | { |
102 | #ifdef HAVE_GLIBC_BACKTRACE | |
103 | #define RFAPI_DEBUG_BACKTRACE_NENTRIES 200 | |
d62a17ae | 104 | void *buf[RFAPI_DEBUG_BACKTRACE_NENTRIES]; |
105 | char **syms; | |
106 | size_t i; | |
107 | size_t size; | |
65efcfce | 108 | |
d62a17ae | 109 | size = backtrace(buf, RFAPI_DEBUG_BACKTRACE_NENTRIES); |
110 | syms = backtrace_symbols(buf, size); | |
65efcfce | 111 | |
d62a17ae | 112 | for (i = 0; i < size && i < RFAPI_DEBUG_BACKTRACE_NENTRIES; ++i) { |
113 | vnc_zlog_debug_verbose("backtrace[%2zu]: %s", i, syms[i]); | |
114 | } | |
65efcfce | 115 | |
d62a17ae | 116 | free(syms); |
65efcfce LB |
117 | #else |
118 | #endif | |
119 | } | |
120 | ||
121 | /* | |
122 | * DEBUG FUNCTION | |
123 | * Count remote routes and compare with actively-maintained values. | |
124 | * Abort if they disagree. | |
125 | */ | |
4d762f26 | 126 | void rfapiCheckRouteCount(void) |
65efcfce | 127 | { |
d62a17ae | 128 | struct bgp *bgp = bgp_get_default(); |
129 | struct rfapi *h; | |
130 | struct rfapi_import_table *it; | |
131 | afi_t afi; | |
132 | ||
133 | assert(bgp); | |
134 | ||
135 | h = bgp->rfapi; | |
136 | assert(h); | |
137 | ||
138 | for (it = h->imports; it; it = it->next) { | |
139 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
140 | ||
fe08ba7e DS |
141 | struct agg_table *rt; |
142 | struct agg_node *rn; | |
d62a17ae | 143 | |
144 | int holddown_count = 0; | |
145 | int local_count = 0; | |
146 | int imported_count = 0; | |
147 | int remote_count = 0; | |
148 | ||
149 | rt = it->imported_vpn[afi]; | |
150 | ||
fe08ba7e DS |
151 | for (rn = agg_route_top(rt); rn; |
152 | rn = agg_route_next(rn)) { | |
40381db7 | 153 | struct bgp_path_info *bpi; |
4b7e6066 | 154 | struct bgp_path_info *next; |
d62a17ae | 155 | |
40381db7 DS |
156 | for (bpi = rn->info; bpi; bpi = next) { |
157 | next = bpi->next; | |
d62a17ae | 158 | |
40381db7 | 159 | if (CHECK_FLAG(bpi->flags, |
1defdda8 | 160 | BGP_PATH_REMOVED)) { |
d62a17ae | 161 | ++holddown_count; |
162 | ||
163 | } else { | |
40381db7 | 164 | if (RFAPI_LOCAL_BI(bpi)) { |
d62a17ae | 165 | ++local_count; |
166 | } else { | |
167 | if (RFAPI_DIRECT_IMPORT_BI( | |
40381db7 | 168 | bpi)) { |
d62a17ae | 169 | ++imported_count; |
170 | } else { | |
171 | ++remote_count; | |
172 | } | |
173 | } | |
174 | } | |
175 | } | |
176 | } | |
177 | ||
178 | if (it->holddown_count[afi] != holddown_count) { | |
179 | vnc_zlog_debug_verbose( | |
180 | "%s: it->holddown_count %d != holddown_count %d", | |
181 | __func__, it->holddown_count[afi], | |
182 | holddown_count); | |
183 | assert(0); | |
184 | } | |
185 | if (it->remote_count[afi] != remote_count) { | |
186 | vnc_zlog_debug_verbose( | |
187 | "%s: it->remote_count %d != remote_count %d", | |
188 | __func__, it->remote_count[afi], | |
189 | remote_count); | |
190 | assert(0); | |
191 | } | |
192 | if (it->imported_count[afi] != imported_count) { | |
193 | vnc_zlog_debug_verbose( | |
194 | "%s: it->imported_count %d != imported_count %d", | |
195 | __func__, it->imported_count[afi], | |
196 | imported_count); | |
197 | assert(0); | |
198 | } | |
199 | } | |
200 | } | |
65efcfce LB |
201 | } |
202 | ||
1e20238a | 203 | #ifdef DEBUG_ROUTE_COUNTERS |
65efcfce LB |
204 | #define VNC_ITRCCK do {rfapiCheckRouteCount();} while (0) |
205 | #else | |
206 | #define VNC_ITRCCK | |
207 | #endif | |
208 | ||
209 | /* | |
210 | * Validate reference count for a node in an import table | |
211 | * | |
212 | * Normally lockoffset is 0 for nodes in quiescent state. However, | |
fe08ba7e | 213 | * agg_unlock_node will delete the node if it is called when |
65efcfce LB |
214 | * node->lock == 1, and we have to validate the refcount before |
215 | * the node is deleted. In this case, we specify lockoffset 1. | |
216 | */ | |
fe08ba7e | 217 | void rfapiCheckRefcount(struct agg_node *rn, safi_t safi, int lockoffset) |
65efcfce | 218 | { |
40381db7 | 219 | unsigned int count_bpi = 0; |
d62a17ae | 220 | unsigned int count_monitor = 0; |
40381db7 | 221 | struct bgp_path_info *bpi; |
d62a17ae | 222 | struct rfapi_monitor_encap *hme; |
223 | struct rfapi_monitor_vpn *hmv; | |
224 | ||
40381db7 DS |
225 | for (bpi = rn->info; bpi; bpi = bpi->next) |
226 | ++count_bpi; | |
d62a17ae | 227 | |
228 | ||
229 | if (rn->aggregate) { | |
230 | ++count_monitor; /* rfapi_it_extra */ | |
231 | ||
232 | switch (safi) { | |
233 | void *cursor; | |
234 | int rc; | |
235 | ||
236 | case SAFI_ENCAP: | |
237 | for (hme = RFAPI_MONITOR_ENCAP(rn); hme; | |
238 | hme = hme->next) | |
239 | ++count_monitor; | |
240 | break; | |
241 | ||
242 | case SAFI_MPLS_VPN: | |
243 | ||
244 | for (hmv = RFAPI_MONITOR_VPN(rn); hmv; hmv = hmv->next) | |
245 | ++count_monitor; | |
246 | ||
247 | if (RFAPI_MONITOR_EXTERIOR(rn)->source) { | |
248 | ++count_monitor; /* sl */ | |
249 | cursor = NULL; | |
250 | for (rc = skiplist_next( | |
251 | RFAPI_MONITOR_EXTERIOR(rn)->source, | |
252 | NULL, NULL, &cursor); | |
253 | !rc; | |
254 | rc = skiplist_next( | |
255 | RFAPI_MONITOR_EXTERIOR(rn)->source, | |
256 | NULL, NULL, &cursor)) { | |
257 | ||
258 | ++count_monitor; /* sl entry */ | |
259 | } | |
260 | } | |
261 | break; | |
262 | ||
263 | default: | |
264 | assert(0); | |
265 | } | |
266 | } | |
267 | ||
c10e14e9 DS |
268 | if (count_bpi + count_monitor + lockoffset |
269 | != agg_node_get_lock_count(rn)) { | |
d62a17ae | 270 | vnc_zlog_debug_verbose( |
40381db7 DS |
271 | "%s: count_bpi=%d, count_monitor=%d, lockoffset=%d, rn->lock=%d", |
272 | __func__, count_bpi, count_monitor, lockoffset, | |
c10e14e9 | 273 | agg_node_get_lock_count(rn)); |
d62a17ae | 274 | assert(0); |
275 | } | |
65efcfce LB |
276 | } |
277 | ||
278 | /* | |
279 | * Perform deferred rfapi_close operations that were queued | |
280 | * during callbacks. | |
281 | */ | |
d62a17ae | 282 | static wq_item_status rfapi_deferred_close_workfunc(struct work_queue *q, |
283 | void *data) | |
65efcfce | 284 | { |
d62a17ae | 285 | struct rfapi_descriptor *rfd = data; |
286 | struct rfapi *h = q->spec.data; | |
287 | ||
288 | assert(!(h->flags & RFAPI_INCALLBACK)); | |
289 | rfapi_close(rfd); | |
290 | vnc_zlog_debug_verbose("%s: completed deferred close on handle %p", | |
291 | __func__, rfd); | |
292 | return WQ_SUCCESS; | |
65efcfce LB |
293 | } |
294 | ||
295 | /* | |
296 | * Extract layer 2 option from Encap TLVS in BGP attrs | |
297 | */ | |
d62a17ae | 298 | int rfapiGetL2o(struct attr *attr, struct rfapi_l2address_option *l2o) |
65efcfce | 299 | { |
d62a17ae | 300 | if (attr) { |
d62a17ae | 301 | struct bgp_attr_encap_subtlv *pEncap; |
302 | ||
91ebf12c | 303 | for (pEncap = bgp_attr_get_vnc_subtlvs(attr); pEncap; |
d62a17ae | 304 | pEncap = pEncap->next) { |
305 | ||
306 | if (pEncap->type == BGP_VNC_SUBTLV_TYPE_RFPOPTION) { | |
307 | if (pEncap->value[0] | |
308 | == RFAPI_VN_OPTION_TYPE_L2ADDR) { | |
309 | ||
310 | if (pEncap->value[1] == 14) { | |
311 | memcpy(l2o->macaddr.octet, | |
312 | pEncap->value + 2, | |
28328ea9 | 313 | ETH_ALEN); |
d62a17ae | 314 | l2o->label = |
315 | ((pEncap->value[10] | |
316 | >> 4) | |
317 | & 0x0f) | |
318 | + ((pEncap->value[9] | |
319 | << 4) | |
320 | & 0xff0) | |
321 | + ((pEncap->value[8] | |
322 | << 12) | |
323 | & 0xff000); | |
324 | ||
325 | l2o->local_nve_id = | |
326 | pEncap->value[12]; | |
327 | ||
328 | l2o->logical_net_id = | |
329 | (pEncap->value[15] | |
330 | & 0xff) | |
331 | + ((pEncap->value[14] | |
332 | << 8) | |
333 | & 0xff00) | |
334 | + ((pEncap->value[13] | |
335 | << 16) | |
336 | & 0xff0000); | |
337 | } | |
338 | ||
339 | return 0; | |
340 | } | |
341 | } | |
342 | } | |
343 | } | |
344 | ||
345 | return ENOENT; | |
65efcfce LB |
346 | } |
347 | ||
348 | /* | |
349 | * Extract the lifetime from the Tunnel Encap attribute of a route in | |
350 | * an import table | |
351 | */ | |
d62a17ae | 352 | int rfapiGetVncLifetime(struct attr *attr, uint32_t *lifetime) |
65efcfce | 353 | { |
d62a17ae | 354 | struct bgp_attr_encap_subtlv *pEncap; |
65efcfce | 355 | |
d62a17ae | 356 | *lifetime = RFAPI_INFINITE_LIFETIME; /* default to infinite */ |
65efcfce | 357 | |
d62a17ae | 358 | if (attr) { |
65efcfce | 359 | |
91ebf12c | 360 | for (pEncap = bgp_attr_get_vnc_subtlvs(attr); pEncap; |
d62a17ae | 361 | pEncap = pEncap->next) { |
65efcfce | 362 | |
d62a17ae | 363 | if (pEncap->type |
364 | == BGP_VNC_SUBTLV_TYPE_LIFETIME) { /* lifetime */ | |
365 | if (pEncap->length == 4) { | |
366 | memcpy(lifetime, pEncap->value, 4); | |
367 | *lifetime = ntohl(*lifetime); | |
368 | return 0; | |
369 | } | |
370 | } | |
371 | } | |
372 | } | |
65efcfce | 373 | |
d62a17ae | 374 | return ENOENT; |
65efcfce LB |
375 | } |
376 | ||
65efcfce LB |
377 | /* |
378 | * Look for UN address in Encap attribute | |
379 | */ | |
d62a17ae | 380 | int rfapiGetVncTunnelUnAddr(struct attr *attr, struct prefix *p) |
65efcfce | 381 | { |
d62a17ae | 382 | struct bgp_attr_encap_subtlv *pEncap; |
f4bd90c5 | 383 | bgp_encap_types tun_type = BGP_ENCAP_TYPE_MPLS;/*Default tunnel type*/ |
d62a17ae | 384 | |
f4bd90c5 | 385 | bgp_attr_extcom_tunnel_type(attr, &tun_type); |
d62a17ae | 386 | if (tun_type == BGP_ENCAP_TYPE_MPLS) { |
387 | if (!p) | |
388 | return 0; | |
389 | /* MPLS carries UN address in next hop */ | |
390 | rfapiNexthop2Prefix(attr, p); | |
c7ca5ccf | 391 | if (p->family != AF_UNSPEC) |
d62a17ae | 392 | return 0; |
393 | ||
394 | return ENOENT; | |
395 | } | |
396 | if (attr) { | |
397 | for (pEncap = attr->encap_subtlvs; pEncap; | |
398 | pEncap = pEncap->next) { | |
399 | ||
400 | if (pEncap->type | |
401 | == BGP_ENCAP_SUBTLV_TYPE_REMOTE_ENDPOINT) { /* un | |
402 | addr | |
403 | */ | |
404 | switch (pEncap->length) { | |
405 | case 8: | |
406 | if (p) { | |
407 | p->family = AF_INET; | |
30360041 | 408 | p->prefixlen = IPV4_MAX_BITLEN; |
d62a17ae | 409 | memcpy(p->u.val, pEncap->value, |
410 | 4); | |
411 | } | |
412 | return 0; | |
413 | ||
414 | case 20: | |
415 | if (p) { | |
416 | p->family = AF_INET6; | |
135e9bdb | 417 | p->prefixlen = IPV6_MAX_BITLEN; |
d62a17ae | 418 | memcpy(p->u.val, pEncap->value, |
419 | 16); | |
420 | } | |
421 | return 0; | |
422 | } | |
423 | } | |
424 | } | |
425 | } | |
426 | ||
427 | return ENOENT; | |
65efcfce LB |
428 | } |
429 | ||
430 | /* | |
431 | * Get UN address wherever it might be | |
432 | */ | |
40381db7 | 433 | int rfapiGetUnAddrOfVpnBi(struct bgp_path_info *bpi, struct prefix *p) |
65efcfce | 434 | { |
d62a17ae | 435 | /* If it's in this route's VNC attribute, we're done */ |
40381db7 | 436 | if (!rfapiGetVncTunnelUnAddr(bpi->attr, p)) |
d62a17ae | 437 | return 0; |
438 | /* | |
439 | * Otherwise, see if it's cached from a corresponding ENCAP SAFI | |
440 | * advertisement | |
441 | */ | |
40381db7 DS |
442 | if (bpi->extra) { |
443 | switch (bpi->extra->vnc.import.un_family) { | |
d62a17ae | 444 | case AF_INET: |
445 | if (p) { | |
40381db7 DS |
446 | p->family = bpi->extra->vnc.import.un_family; |
447 | p->u.prefix4 = bpi->extra->vnc.import.un.addr4; | |
30360041 | 448 | p->prefixlen = IPV4_MAX_BITLEN; |
d62a17ae | 449 | } |
450 | return 0; | |
451 | case AF_INET6: | |
452 | if (p) { | |
40381db7 DS |
453 | p->family = bpi->extra->vnc.import.un_family; |
454 | p->u.prefix6 = bpi->extra->vnc.import.un.addr6; | |
135e9bdb | 455 | p->prefixlen = IPV6_MAX_BITLEN; |
d62a17ae | 456 | } |
457 | return 0; | |
458 | default: | |
459 | if (p) | |
c7ca5ccf | 460 | p->family = AF_UNSPEC; |
1e20238a | 461 | #ifdef DEBUG_ENCAP_MONITOR |
d62a17ae | 462 | vnc_zlog_debug_verbose( |
40381db7 | 463 | "%s: bpi->extra->vnc.import.un_family is 0, no UN addr", |
d62a17ae | 464 | __func__); |
65efcfce | 465 | #endif |
d62a17ae | 466 | break; |
467 | } | |
468 | } | |
65efcfce | 469 | |
d62a17ae | 470 | return ENOENT; |
65efcfce LB |
471 | } |
472 | ||
473 | ||
474 | /* | |
9b6d8fcf | 475 | * Make a new bgp_path_info from gathered parameters |
65efcfce | 476 | */ |
4b7e6066 DS |
477 | static struct bgp_path_info *rfapiBgpInfoCreate(struct attr *attr, |
478 | struct peer *peer, void *rfd, | |
479 | struct prefix_rd *prd, | |
480 | uint8_t type, uint8_t sub_type, | |
481 | uint32_t *label) | |
65efcfce | 482 | { |
4b7e6066 | 483 | struct bgp_path_info *new; |
d62a17ae | 484 | |
9591da26 DS |
485 | new = info_make(type, sub_type, 0, peer, attr, NULL); |
486 | ||
05864da7 | 487 | new->attr = bgp_attr_intern(attr); |
d62a17ae | 488 | |
18ee8310 | 489 | bgp_path_info_extra_get(new); |
d62a17ae | 490 | if (prd) { |
491 | new->extra->vnc.import.rd = *prd; | |
492 | rfapi_time(&new->extra->vnc.import.create_time); | |
493 | } | |
494 | if (label) | |
317f1fe0 | 495 | encode_label(*label, &new->extra->label[0]); |
9591da26 | 496 | |
d62a17ae | 497 | peer_lock(peer); |
498 | ||
499 | return new; | |
65efcfce LB |
500 | } |
501 | ||
502 | /* | |
9b6d8fcf | 503 | * Frees bgp_path_info as used in import tables (parts are not |
65efcfce LB |
504 | * allocated exactly the way they are in the main RIBs) |
505 | */ | |
4b7e6066 | 506 | static void rfapiBgpInfoFree(struct bgp_path_info *goner) |
65efcfce | 507 | { |
d62a17ae | 508 | if (!goner) |
509 | return; | |
510 | ||
511 | if (goner->peer) { | |
512 | vnc_zlog_debug_verbose("%s: calling peer_unlock(%p), #%d", | |
513 | __func__, goner->peer, | |
514 | goner->peer->lock); | |
515 | peer_unlock(goner->peer); | |
516 | } | |
517 | ||
05864da7 DS |
518 | bgp_attr_unintern(&goner->attr); |
519 | ||
a2e219fe PG |
520 | if (goner->extra) |
521 | bgp_path_info_extra_free(&goner->extra); | |
d62a17ae | 522 | XFREE(MTYPE_BGP_ROUTE, goner); |
65efcfce LB |
523 | } |
524 | ||
d62a17ae | 525 | struct rfapi_import_table *rfapiMacImportTableGetNoAlloc(struct bgp *bgp, |
526 | uint32_t lni) | |
65efcfce | 527 | { |
d62a17ae | 528 | struct rfapi *h; |
529 | struct rfapi_import_table *it = NULL; | |
530 | uintptr_t lni_as_ptr = lni; | |
65efcfce | 531 | |
d62a17ae | 532 | h = bgp->rfapi; |
533 | if (!h) | |
534 | return NULL; | |
65efcfce | 535 | |
d62a17ae | 536 | if (!h->import_mac) |
537 | return NULL; | |
65efcfce | 538 | |
d62a17ae | 539 | if (skiplist_search(h->import_mac, (void *)lni_as_ptr, (void **)&it)) |
540 | return NULL; | |
65efcfce | 541 | |
d62a17ae | 542 | return it; |
65efcfce LB |
543 | } |
544 | ||
d62a17ae | 545 | struct rfapi_import_table *rfapiMacImportTableGet(struct bgp *bgp, uint32_t lni) |
65efcfce | 546 | { |
d62a17ae | 547 | struct rfapi *h; |
548 | struct rfapi_import_table *it = NULL; | |
549 | uintptr_t lni_as_ptr = lni; | |
550 | ||
551 | h = bgp->rfapi; | |
552 | assert(h); | |
553 | ||
554 | if (!h->import_mac) { | |
555 | /* default cmp is good enough for LNI */ | |
556 | h->import_mac = skiplist_new(0, NULL, NULL); | |
557 | } | |
558 | ||
559 | if (skiplist_search(h->import_mac, (void *)lni_as_ptr, (void **)&it)) { | |
560 | ||
561 | struct ecommunity *enew; | |
562 | struct ecommunity_val eval; | |
563 | afi_t afi; | |
564 | ||
565 | it = XCALLOC(MTYPE_RFAPI_IMPORTTABLE, | |
566 | sizeof(struct rfapi_import_table)); | |
567 | /* set RT list of new import table based on LNI */ | |
568 | memset((char *)&eval, 0, sizeof(eval)); | |
569 | eval.val[0] = 0; /* VNC L2VPN */ | |
570 | eval.val[1] = 2; /* VNC L2VPN */ | |
571 | eval.val[5] = (lni >> 16) & 0xff; | |
572 | eval.val[6] = (lni >> 8) & 0xff; | |
573 | eval.val[7] = (lni >> 0) & 0xff; | |
574 | ||
575 | enew = ecommunity_new(); | |
1207a5bc | 576 | ecommunity_add_val(enew, &eval, false, false); |
d62a17ae | 577 | it->rt_import_list = enew; |
578 | ||
579 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
fe08ba7e DS |
580 | it->imported_vpn[afi] = agg_table_init(); |
581 | it->imported_encap[afi] = agg_table_init(); | |
d62a17ae | 582 | } |
583 | ||
584 | it->l2_logical_net_id = lni; | |
585 | ||
586 | skiplist_insert(h->import_mac, (void *)lni_as_ptr, it); | |
587 | } | |
588 | ||
589 | assert(it); | |
590 | return it; | |
65efcfce LB |
591 | } |
592 | ||
593 | /* | |
594 | * Implement MONITOR_MOVE_SHORTER(original_node) from | |
595 | * RFAPI-Import-Event-Handling.txt | |
d62a17ae | 596 | * |
65efcfce LB |
597 | * Returns pointer to the list of moved monitors |
598 | */ | |
599 | static struct rfapi_monitor_vpn * | |
fe08ba7e | 600 | rfapiMonitorMoveShorter(struct agg_node *original_vpn_node, int lockoffset) |
65efcfce | 601 | { |
40381db7 | 602 | struct bgp_path_info *bpi; |
fe08ba7e | 603 | struct agg_node *par; |
d62a17ae | 604 | struct rfapi_monitor_vpn *m; |
605 | struct rfapi_monitor_vpn *mlast; | |
606 | struct rfapi_monitor_vpn *moved; | |
607 | int movecount = 0; | |
608 | int parent_already_refcounted = 0; | |
65efcfce | 609 | |
d62a17ae | 610 | RFAPI_CHECK_REFCOUNT(original_vpn_node, SAFI_MPLS_VPN, lockoffset); |
65efcfce | 611 | |
1e20238a | 612 | #ifdef DEBUG_MONITOR_MOVE_SHORTER |
d62a17ae | 613 | { |
2dbe669b DA |
614 | vnc_zlog_debug_verbose("%s: called with node pfx=%pFX", |
615 | __func__, &original_vpn_node->p); | |
d62a17ae | 616 | } |
65efcfce LB |
617 | #endif |
618 | ||
d62a17ae | 619 | /* |
40381db7 | 620 | * 1. If there is at least one bpi (either regular route or |
d62a17ae | 621 | * route marked as withdrawn, with a pending timer) at |
622 | * original_node with a valid UN address, we're done. Return. | |
623 | */ | |
40381db7 | 624 | for (bpi = original_vpn_node->info; bpi; bpi = bpi->next) { |
d62a17ae | 625 | struct prefix pfx; |
626 | ||
40381db7 | 627 | if (!rfapiGetUnAddrOfVpnBi(bpi, &pfx)) { |
1e20238a | 628 | #ifdef DEBUG_MONITOR_MOVE_SHORTER |
d62a17ae | 629 | vnc_zlog_debug_verbose( |
630 | "%s: have valid UN at original node, no change", | |
631 | __func__); | |
65efcfce | 632 | #endif |
d62a17ae | 633 | return NULL; |
634 | } | |
635 | } | |
636 | ||
637 | /* | |
638 | * 2. Travel up the tree (toward less-specific prefixes) from | |
639 | * original_node to find the first node that has at least | |
640 | * one route (even if it is only a withdrawn route) with a | |
641 | * valid UN address. Call this node "Node P." | |
642 | */ | |
fe08ba7e DS |
643 | for (par = agg_node_parent(original_vpn_node); par; |
644 | par = agg_node_parent(par)) { | |
40381db7 | 645 | for (bpi = par->info; bpi; bpi = bpi->next) { |
d62a17ae | 646 | struct prefix pfx; |
40381db7 | 647 | if (!rfapiGetUnAddrOfVpnBi(bpi, &pfx)) { |
d62a17ae | 648 | break; |
649 | } | |
650 | } | |
40381db7 | 651 | if (bpi) |
d62a17ae | 652 | break; |
653 | } | |
654 | ||
655 | if (par) { | |
656 | RFAPI_CHECK_REFCOUNT(par, SAFI_MPLS_VPN, 0); | |
657 | } | |
658 | ||
659 | /* | |
660 | * If no less-specific routes, try to use the 0/0 node | |
661 | */ | |
662 | if (!par) { | |
26a3ffd6 | 663 | const struct prefix *p; |
d62a17ae | 664 | /* this isn't necessarily 0/0 */ |
fe08ba7e | 665 | par = agg_route_table_top(original_vpn_node); |
d62a17ae | 666 | |
26a3ffd6 DS |
667 | if (par) |
668 | p = agg_node_get_prefix(par); | |
d62a17ae | 669 | /* |
670 | * If we got the top node but it wasn't 0/0, | |
671 | * ignore it | |
672 | */ | |
26a3ffd6 | 673 | if (par && p->prefixlen) { |
fe08ba7e | 674 | agg_unlock_node(par); /* maybe free */ |
d62a17ae | 675 | par = NULL; |
676 | } | |
677 | ||
678 | if (par) { | |
679 | ++parent_already_refcounted; | |
680 | } | |
681 | } | |
682 | ||
683 | /* | |
684 | * Create 0/0 node if it isn't there | |
685 | */ | |
686 | if (!par) { | |
687 | struct prefix pfx_default; | |
26a3ffd6 | 688 | const struct prefix *p = agg_node_get_prefix(original_vpn_node); |
d62a17ae | 689 | |
690 | memset(&pfx_default, 0, sizeof(pfx_default)); | |
26a3ffd6 | 691 | pfx_default.family = p->family; |
d62a17ae | 692 | |
693 | /* creates default node if none exists */ | |
fe08ba7e DS |
694 | par = agg_node_get(agg_get_table(original_vpn_node), |
695 | &pfx_default); | |
d62a17ae | 696 | ++parent_already_refcounted; |
697 | } | |
698 | ||
699 | /* | |
700 | * 3. Move each of the monitors found at original_node to Node P. | |
701 | * These are "Moved Monitors." | |
702 | * | |
703 | */ | |
704 | ||
705 | /* | |
706 | * Attach at end so that the list pointer we return points | |
707 | * only to the moved routes | |
708 | */ | |
709 | for (m = RFAPI_MONITOR_VPN(par), mlast = NULL; m; | |
710 | mlast = m, m = m->next) | |
711 | ; | |
712 | ||
713 | if (mlast) { | |
714 | moved = mlast->next = RFAPI_MONITOR_VPN(original_vpn_node); | |
715 | } else { | |
716 | moved = RFAPI_MONITOR_VPN_W_ALLOC(par) = | |
717 | RFAPI_MONITOR_VPN(original_vpn_node); | |
718 | } | |
719 | if (RFAPI_MONITOR_VPN( | |
720 | original_vpn_node)) /* check agg, so not allocated */ | |
721 | RFAPI_MONITOR_VPN_W_ALLOC(original_vpn_node) = NULL; | |
722 | ||
723 | /* | |
724 | * update the node pointers on the monitors | |
725 | */ | |
726 | for (m = moved; m; m = m->next) { | |
727 | ++movecount; | |
728 | m->node = par; | |
729 | } | |
730 | ||
731 | RFAPI_CHECK_REFCOUNT(par, SAFI_MPLS_VPN, | |
732 | parent_already_refcounted - movecount); | |
733 | while (movecount > parent_already_refcounted) { | |
fe08ba7e | 734 | agg_lock_node(par); |
d62a17ae | 735 | ++parent_already_refcounted; |
736 | } | |
737 | while (movecount < parent_already_refcounted) { | |
738 | /* unlikely, but code defensively */ | |
fe08ba7e | 739 | agg_unlock_node(par); |
d62a17ae | 740 | --parent_already_refcounted; |
741 | } | |
742 | RFAPI_CHECK_REFCOUNT(original_vpn_node, SAFI_MPLS_VPN, | |
743 | movecount + lockoffset); | |
744 | while (movecount--) { | |
fe08ba7e | 745 | agg_unlock_node(original_vpn_node); |
d62a17ae | 746 | } |
65efcfce | 747 | |
1e20238a | 748 | #ifdef DEBUG_MONITOR_MOVE_SHORTER |
d62a17ae | 749 | { |
2dbe669b DA |
750 | vnc_zlog_debug_verbose("%s: moved to node pfx=%pFX", __func__, |
751 | &par->p); | |
d62a17ae | 752 | } |
65efcfce LB |
753 | #endif |
754 | ||
755 | ||
d62a17ae | 756 | return moved; |
65efcfce LB |
757 | } |
758 | ||
759 | /* | |
760 | * Implement MONITOR_MOVE_LONGER(new_node) from | |
761 | * RFAPI-Import-Event-Handling.txt | |
762 | */ | |
fe08ba7e | 763 | static void rfapiMonitorMoveLonger(struct agg_node *new_vpn_node) |
65efcfce | 764 | { |
d62a17ae | 765 | struct rfapi_monitor_vpn *monitor; |
766 | struct rfapi_monitor_vpn *mlast; | |
40381db7 | 767 | struct bgp_path_info *bpi; |
fe08ba7e | 768 | struct agg_node *par; |
26a3ffd6 | 769 | const struct prefix *new_vpn_node_p = agg_node_get_prefix(new_vpn_node); |
d62a17ae | 770 | |
771 | RFAPI_CHECK_REFCOUNT(new_vpn_node, SAFI_MPLS_VPN, 0); | |
772 | ||
773 | /* | |
774 | * Make sure we have at least one valid route at the new node | |
775 | */ | |
40381db7 | 776 | for (bpi = new_vpn_node->info; bpi; bpi = bpi->next) { |
d62a17ae | 777 | struct prefix pfx; |
40381db7 | 778 | if (!rfapiGetUnAddrOfVpnBi(bpi, &pfx)) |
d62a17ae | 779 | break; |
780 | } | |
781 | ||
40381db7 | 782 | if (!bpi) { |
d62a17ae | 783 | vnc_zlog_debug_verbose( |
784 | "%s: no valid routes at node %p, so not attempting moves", | |
785 | __func__, new_vpn_node); | |
786 | return; | |
787 | } | |
788 | ||
789 | /* | |
790 | * Find first parent node that has monitors | |
791 | */ | |
fe08ba7e DS |
792 | for (par = agg_node_parent(new_vpn_node); par; |
793 | par = agg_node_parent(par)) { | |
d62a17ae | 794 | if (RFAPI_MONITOR_VPN(par)) |
795 | break; | |
796 | } | |
797 | ||
798 | if (!par) { | |
799 | vnc_zlog_debug_verbose( | |
800 | "%s: no parent nodes with monitors, done", __func__); | |
801 | return; | |
802 | } | |
803 | ||
804 | /* | |
805 | * Check each of these monitors to see of their longest-match | |
806 | * is now the updated node. Move any such monitors to the more- | |
807 | * specific updated node | |
808 | */ | |
809 | for (mlast = NULL, monitor = RFAPI_MONITOR_VPN(par); monitor;) { | |
d62a17ae | 810 | /* |
811 | * If new longest match for monitor prefix is the new | |
812 | * route's prefix, move monitor to new route's prefix | |
813 | */ | |
26a3ffd6 | 814 | if (prefix_match(new_vpn_node_p, &monitor->p)) { |
d62a17ae | 815 | /* detach */ |
816 | if (mlast) { | |
817 | mlast->next = monitor->next; | |
818 | } else { | |
819 | RFAPI_MONITOR_VPN_W_ALLOC(par) = monitor->next; | |
820 | } | |
821 | ||
822 | ||
823 | /* attach */ | |
824 | monitor->next = RFAPI_MONITOR_VPN(new_vpn_node); | |
825 | RFAPI_MONITOR_VPN_W_ALLOC(new_vpn_node) = monitor; | |
826 | monitor->node = new_vpn_node; | |
827 | ||
fe08ba7e | 828 | agg_lock_node(new_vpn_node); /* incr refcount */ |
d62a17ae | 829 | |
830 | monitor = mlast ? mlast->next : RFAPI_MONITOR_VPN(par); | |
831 | ||
832 | RFAPI_CHECK_REFCOUNT(par, SAFI_MPLS_VPN, 1); | |
833 | /* decr refcount after we're done with par as this might | |
834 | * free it */ | |
fe08ba7e | 835 | agg_unlock_node(par); |
d62a17ae | 836 | |
837 | continue; | |
838 | } | |
839 | mlast = monitor; | |
840 | monitor = monitor->next; | |
841 | } | |
842 | ||
843 | RFAPI_CHECK_REFCOUNT(new_vpn_node, SAFI_MPLS_VPN, 0); | |
65efcfce LB |
844 | } |
845 | ||
846 | ||
40381db7 | 847 | static void rfapiBgpInfoChainFree(struct bgp_path_info *bpi) |
65efcfce | 848 | { |
4b7e6066 | 849 | struct bgp_path_info *next; |
d62a17ae | 850 | |
40381db7 | 851 | while (bpi) { |
d62a17ae | 852 | |
853 | /* | |
40381db7 | 854 | * If there is a timer waiting to delete this bpi, cancel |
d62a17ae | 855 | * the timer and delete immediately |
856 | */ | |
40381db7 DS |
857 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
858 | && bpi->extra->vnc.import.timer) { | |
d62a17ae | 859 | |
b3d6bc6e MS |
860 | struct thread **t = |
861 | &(bpi->extra->vnc.import.timer); | |
862 | struct rfapi_withdraw *wcb = (*t)->arg; | |
d62a17ae | 863 | |
864 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
865 | thread_cancel(t); | |
866 | } | |
867 | ||
40381db7 DS |
868 | next = bpi->next; |
869 | bpi->next = NULL; | |
870 | rfapiBgpInfoFree(bpi); | |
871 | bpi = next; | |
d62a17ae | 872 | } |
65efcfce LB |
873 | } |
874 | ||
d62a17ae | 875 | static void rfapiImportTableFlush(struct rfapi_import_table *it) |
65efcfce | 876 | { |
d62a17ae | 877 | afi_t afi; |
878 | ||
879 | /* | |
880 | * Free ecommunity | |
881 | */ | |
882 | ecommunity_free(&it->rt_import_list); | |
883 | it->rt_import_list = NULL; | |
884 | ||
885 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
886 | ||
fe08ba7e | 887 | struct agg_node *rn; |
d62a17ae | 888 | |
fe08ba7e DS |
889 | for (rn = agg_route_top(it->imported_vpn[afi]); rn; |
890 | rn = agg_route_next(rn)) { | |
d62a17ae | 891 | /* |
892 | * Each route_node has: | |
893 | * aggregate: points to rfapi_it_extra with monitor | |
894 | * chain(s) | |
9b6d8fcf | 895 | * info: points to chain of bgp_path_info |
d62a17ae | 896 | */ |
9b6d8fcf | 897 | /* free bgp_path_info and its children */ |
d62a17ae | 898 | rfapiBgpInfoChainFree(rn->info); |
899 | rn->info = NULL; | |
900 | ||
901 | rfapiMonitorExtraFlush(SAFI_MPLS_VPN, rn); | |
902 | } | |
903 | ||
fe08ba7e DS |
904 | for (rn = agg_route_top(it->imported_encap[afi]); rn; |
905 | rn = agg_route_next(rn)) { | |
9b6d8fcf | 906 | /* free bgp_path_info and its children */ |
d62a17ae | 907 | rfapiBgpInfoChainFree(rn->info); |
908 | rn->info = NULL; | |
909 | ||
910 | rfapiMonitorExtraFlush(SAFI_ENCAP, rn); | |
911 | } | |
912 | ||
fe08ba7e DS |
913 | agg_table_finish(it->imported_vpn[afi]); |
914 | agg_table_finish(it->imported_encap[afi]); | |
d62a17ae | 915 | } |
916 | if (it->monitor_exterior_orphans) { | |
917 | skiplist_free(it->monitor_exterior_orphans); | |
918 | } | |
65efcfce LB |
919 | } |
920 | ||
d62a17ae | 921 | void rfapiImportTableRefDelByIt(struct bgp *bgp, |
922 | struct rfapi_import_table *it_target) | |
65efcfce | 923 | { |
d62a17ae | 924 | struct rfapi *h; |
925 | struct rfapi_import_table *it; | |
926 | struct rfapi_import_table *prev = NULL; | |
927 | ||
928 | assert(it_target); | |
929 | ||
930 | h = bgp->rfapi; | |
931 | assert(h); | |
932 | ||
933 | for (it = h->imports; it; prev = it, it = it->next) { | |
934 | if (it == it_target) | |
935 | break; | |
936 | } | |
937 | ||
938 | assert(it); | |
939 | assert(it->refcount); | |
940 | ||
941 | it->refcount -= 1; | |
942 | ||
943 | if (!it->refcount) { | |
944 | if (prev) { | |
945 | prev->next = it->next; | |
946 | } else { | |
947 | h->imports = it->next; | |
948 | } | |
949 | rfapiImportTableFlush(it); | |
950 | XFREE(MTYPE_RFAPI_IMPORTTABLE, it); | |
951 | } | |
65efcfce LB |
952 | } |
953 | ||
1e20238a | 954 | #ifdef RFAPI_REQUIRE_ENCAP_BEEC |
65efcfce LB |
955 | /* |
956 | * Look for magic BGP Encapsulation Extended Community value | |
957 | * Format in RFC 5512 Sect. 4.5 | |
958 | */ | |
d62a17ae | 959 | static int rfapiEcommunitiesMatchBeec(struct ecommunity *ecom, |
960 | bgp_encap_types type) | |
65efcfce | 961 | { |
d62a17ae | 962 | int i; |
65efcfce | 963 | |
d62a17ae | 964 | if (!ecom) |
965 | return 0; | |
65efcfce | 966 | |
d62a17ae | 967 | for (i = 0; i < (ecom->size * ECOMMUNITY_SIZE); i += ECOMMUNITY_SIZE) { |
65efcfce | 968 | |
d62a17ae | 969 | uint8_t *ep; |
65efcfce | 970 | |
d62a17ae | 971 | ep = ecom->val + i; |
65efcfce | 972 | |
d62a17ae | 973 | if (ep[0] == ECOMMUNITY_ENCODE_OPAQUE |
974 | && ep[1] == ECOMMUNITY_OPAQUE_SUBTYPE_ENCAP | |
975 | && ep[6] == ((type && 0xff00) >> 8) | |
976 | && ep[7] == (type & 0xff)) { | |
65efcfce | 977 | |
d62a17ae | 978 | return 1; |
979 | } | |
980 | } | |
981 | return 0; | |
65efcfce LB |
982 | } |
983 | #endif | |
984 | ||
d62a17ae | 985 | int rfapiEcommunitiesIntersect(struct ecommunity *e1, struct ecommunity *e2) |
65efcfce | 986 | { |
f6e07e1b | 987 | uint32_t i, j; |
d62a17ae | 988 | |
989 | if (!e1 || !e2) | |
990 | return 0; | |
991 | ||
992 | { | |
993 | char *s1, *s2; | |
994 | s1 = ecommunity_ecom2str(e1, ECOMMUNITY_FORMAT_DISPLAY, 0); | |
995 | s2 = ecommunity_ecom2str(e2, ECOMMUNITY_FORMAT_DISPLAY, 0); | |
996 | vnc_zlog_debug_verbose("%s: e1[%s], e2[%s]", __func__, s1, s2); | |
997 | XFREE(MTYPE_ECOMMUNITY_STR, s1); | |
998 | XFREE(MTYPE_ECOMMUNITY_STR, s2); | |
999 | } | |
1000 | ||
1001 | for (i = 0; i < e1->size; ++i) { | |
1002 | for (j = 0; j < e2->size; ++j) { | |
1003 | if (!memcmp(e1->val + (i * ECOMMUNITY_SIZE), | |
1004 | e2->val + (j * ECOMMUNITY_SIZE), | |
1005 | ECOMMUNITY_SIZE)) { | |
1006 | ||
1007 | return 1; | |
1008 | } | |
1009 | } | |
1010 | } | |
1011 | return 0; | |
65efcfce LB |
1012 | } |
1013 | ||
d62a17ae | 1014 | int rfapiEcommunityGetLNI(struct ecommunity *ecom, uint32_t *lni) |
65efcfce | 1015 | { |
d62a17ae | 1016 | if (ecom) { |
f6e07e1b DS |
1017 | uint32_t i; |
1018 | ||
d62a17ae | 1019 | for (i = 0; i < ecom->size; ++i) { |
1020 | uint8_t *p = ecom->val + (i * ECOMMUNITY_SIZE); | |
1021 | ||
1022 | if ((*(p + 0) == 0x00) && (*(p + 1) == 0x02)) { | |
1023 | ||
1024 | *lni = (*(p + 5) << 16) | (*(p + 6) << 8) | |
1025 | | (*(p + 7)); | |
1026 | return 0; | |
1027 | } | |
1028 | } | |
1029 | } | |
1030 | return ENOENT; | |
65efcfce LB |
1031 | } |
1032 | ||
d62a17ae | 1033 | int rfapiEcommunityGetEthernetTag(struct ecommunity *ecom, uint16_t *tag_id) |
79799987 | 1034 | { |
d62a17ae | 1035 | struct bgp *bgp = bgp_get_default(); |
1036 | *tag_id = 0; /* default to untagged */ | |
1037 | if (ecom) { | |
f6e07e1b DS |
1038 | uint32_t i; |
1039 | ||
d62a17ae | 1040 | for (i = 0; i < ecom->size; ++i) { |
1041 | as_t as = 0; | |
1042 | int encode = 0; | |
1be1693e | 1043 | const uint8_t *p = ecom->val + (i * ECOMMUNITY_SIZE); |
d62a17ae | 1044 | |
1045 | /* High-order octet of type. */ | |
1046 | encode = *p++; | |
1047 | ||
1048 | if (*p++ == ECOMMUNITY_ROUTE_TARGET) { | |
1049 | if (encode == ECOMMUNITY_ENCODE_AS4) { | |
937652c6 | 1050 | p = ptr_get_be32(p, &as); |
d62a17ae | 1051 | } else if (encode == ECOMMUNITY_ENCODE_AS) { |
1052 | as = (*p++ << 8); | |
1053 | as |= (*p++); | |
996c9314 LB |
1054 | p += 2; /* skip next two, tag/vid |
1055 | always in lowest bytes */ | |
d62a17ae | 1056 | } |
1057 | if (as == bgp->as) { | |
1058 | *tag_id = *p++ << 8; | |
1059 | *tag_id |= (*p++); | |
1060 | return 0; | |
1061 | } | |
1062 | } | |
1063 | } | |
1064 | } | |
1065 | return ENOENT; | |
79799987 LB |
1066 | } |
1067 | ||
40381db7 | 1068 | static int rfapiVpnBiNhEqualsPt(struct bgp_path_info *bpi, |
4b7e6066 | 1069 | struct rfapi_ip_addr *hpt) |
65efcfce | 1070 | { |
d62a17ae | 1071 | uint8_t family; |
65efcfce | 1072 | |
40381db7 | 1073 | if (!hpt || !bpi) |
d62a17ae | 1074 | return 0; |
65efcfce | 1075 | |
40381db7 | 1076 | family = BGP_MP_NEXTHOP_FAMILY(bpi->attr->mp_nexthop_len); |
65efcfce | 1077 | |
d62a17ae | 1078 | if (hpt->addr_family != family) |
1079 | return 0; | |
65efcfce | 1080 | |
d62a17ae | 1081 | switch (family) { |
1082 | case AF_INET: | |
40381db7 | 1083 | if (bpi->attr->mp_nexthop_global_in.s_addr |
d62a17ae | 1084 | != hpt->addr.v4.s_addr) |
1085 | return 0; | |
1086 | break; | |
65efcfce | 1087 | |
d62a17ae | 1088 | case AF_INET6: |
40381db7 | 1089 | if (IPV6_ADDR_CMP(&bpi->attr->mp_nexthop_global, &hpt->addr.v6)) |
d62a17ae | 1090 | return 0; |
1091 | break; | |
65efcfce | 1092 | |
d62a17ae | 1093 | default: |
1094 | return 0; | |
d62a17ae | 1095 | } |
65efcfce | 1096 | |
d62a17ae | 1097 | return 1; |
65efcfce LB |
1098 | } |
1099 | ||
1100 | ||
1101 | /* | |
1102 | * Compare 2 VPN BIs. Return true if they have the same VN and UN addresses | |
1103 | */ | |
40381db7 DS |
1104 | static int rfapiVpnBiSamePtUn(struct bgp_path_info *bpi1, |
1105 | struct bgp_path_info *bpi2) | |
65efcfce | 1106 | { |
d62a17ae | 1107 | struct prefix pfx_un1; |
1108 | struct prefix pfx_un2; | |
1109 | ||
40381db7 | 1110 | if (!bpi1 || !bpi2) |
d62a17ae | 1111 | return 0; |
1112 | ||
d62a17ae | 1113 | /* |
1114 | * VN address comparisons | |
1115 | */ | |
1116 | ||
40381db7 DS |
1117 | if (BGP_MP_NEXTHOP_FAMILY(bpi1->attr->mp_nexthop_len) |
1118 | != BGP_MP_NEXTHOP_FAMILY(bpi2->attr->mp_nexthop_len)) { | |
d62a17ae | 1119 | return 0; |
1120 | } | |
1121 | ||
40381db7 | 1122 | switch (BGP_MP_NEXTHOP_FAMILY(bpi1->attr->mp_nexthop_len)) { |
d62a17ae | 1123 | case AF_INET: |
40381db7 DS |
1124 | if (bpi1->attr->mp_nexthop_global_in.s_addr |
1125 | != bpi2->attr->mp_nexthop_global_in.s_addr) | |
d62a17ae | 1126 | return 0; |
1127 | break; | |
1128 | ||
1129 | case AF_INET6: | |
40381db7 DS |
1130 | if (IPV6_ADDR_CMP(&bpi1->attr->mp_nexthop_global, |
1131 | &bpi2->attr->mp_nexthop_global)) | |
d62a17ae | 1132 | return 0; |
1133 | break; | |
1134 | ||
1135 | default: | |
1136 | return 0; | |
d62a17ae | 1137 | } |
1138 | ||
fa3bf3a2 MS |
1139 | memset(&pfx_un1, 0, sizeof(pfx_un1)); |
1140 | memset(&pfx_un2, 0, sizeof(pfx_un2)); | |
1141 | ||
d62a17ae | 1142 | /* |
1143 | * UN address comparisons | |
1144 | */ | |
40381db7 DS |
1145 | if (rfapiGetVncTunnelUnAddr(bpi1->attr, &pfx_un1)) { |
1146 | if (bpi1->extra) { | |
1147 | pfx_un1.family = bpi1->extra->vnc.import.un_family; | |
1148 | switch (bpi1->extra->vnc.import.un_family) { | |
d62a17ae | 1149 | case AF_INET: |
1150 | pfx_un1.u.prefix4 = | |
40381db7 | 1151 | bpi1->extra->vnc.import.un.addr4; |
d62a17ae | 1152 | break; |
1153 | case AF_INET6: | |
1154 | pfx_un1.u.prefix6 = | |
40381db7 | 1155 | bpi1->extra->vnc.import.un.addr6; |
d62a17ae | 1156 | break; |
1157 | default: | |
c7ca5ccf | 1158 | pfx_un1.family = AF_UNSPEC; |
d62a17ae | 1159 | break; |
1160 | } | |
1161 | } | |
1162 | } | |
1163 | ||
40381db7 DS |
1164 | if (rfapiGetVncTunnelUnAddr(bpi2->attr, &pfx_un2)) { |
1165 | if (bpi2->extra) { | |
1166 | pfx_un2.family = bpi2->extra->vnc.import.un_family; | |
1167 | switch (bpi2->extra->vnc.import.un_family) { | |
d62a17ae | 1168 | case AF_INET: |
1169 | pfx_un2.u.prefix4 = | |
40381db7 | 1170 | bpi2->extra->vnc.import.un.addr4; |
d62a17ae | 1171 | break; |
1172 | case AF_INET6: | |
1173 | pfx_un2.u.prefix6 = | |
40381db7 | 1174 | bpi2->extra->vnc.import.un.addr6; |
d62a17ae | 1175 | break; |
1176 | default: | |
c7ca5ccf | 1177 | pfx_un2.family = AF_UNSPEC; |
d62a17ae | 1178 | break; |
1179 | } | |
1180 | } | |
1181 | } | |
1182 | ||
c7ca5ccf | 1183 | if (pfx_un1.family == AF_UNSPEC || pfx_un2.family == AF_UNSPEC) |
d62a17ae | 1184 | return 0; |
1185 | ||
1186 | if (pfx_un1.family != pfx_un2.family) | |
1187 | return 0; | |
1188 | ||
1189 | switch (pfx_un1.family) { | |
1190 | case AF_INET: | |
996c9314 | 1191 | if (!IPV4_ADDR_SAME(&pfx_un1.u.prefix4, &pfx_un2.u.prefix4)) |
d62a17ae | 1192 | return 0; |
1193 | break; | |
1194 | case AF_INET6: | |
1195 | if (!IPV6_ADDR_SAME(&pfx_un1.u.prefix6, &pfx_un2.u.prefix6)) | |
1196 | return 0; | |
1197 | break; | |
1198 | } | |
1199 | ||
1200 | ||
1201 | return 1; | |
65efcfce LB |
1202 | } |
1203 | ||
d62a17ae | 1204 | uint8_t rfapiRfpCost(struct attr *attr) |
65efcfce | 1205 | { |
d62a17ae | 1206 | if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF)) { |
1207 | if (attr->local_pref > 255) { | |
1208 | return 0; | |
1209 | } | |
1210 | return 255 - attr->local_pref; | |
1211 | } | |
1212 | ||
1213 | return 255; | |
65efcfce LB |
1214 | } |
1215 | ||
1216 | /*------------------------------------------ | |
1217 | * rfapi_extract_l2o | |
1218 | * | |
d62a17ae | 1219 | * Find Layer 2 options in an option chain |
65efcfce | 1220 | * |
d62a17ae | 1221 | * input: |
65efcfce LB |
1222 | * pHop option chain |
1223 | * | |
1224 | * output: | |
1225 | * l2o layer 2 options extracted | |
1226 | * | |
1227 | * return value: | |
1228 | * 0 OK | |
1229 | * 1 no options found | |
1230 | * | |
1231 | --------------------------------------------*/ | |
d62a17ae | 1232 | int rfapi_extract_l2o( |
1233 | struct bgp_tea_options *pHop, /* chain of options */ | |
1234 | struct rfapi_l2address_option *l2o) /* return extracted value */ | |
65efcfce | 1235 | { |
d62a17ae | 1236 | struct bgp_tea_options *p; |
65efcfce | 1237 | |
d62a17ae | 1238 | for (p = pHop; p; p = p->next) { |
1239 | if ((p->type == RFAPI_VN_OPTION_TYPE_L2ADDR) | |
1240 | && (p->length >= 8)) { | |
65efcfce | 1241 | |
d62a17ae | 1242 | char *v = p->value; |
65efcfce | 1243 | |
d62a17ae | 1244 | memcpy(&l2o->macaddr, v, 6); |
65efcfce | 1245 | |
d62a17ae | 1246 | l2o->label = ((v[6] << 12) & 0xff000) |
1247 | + ((v[7] << 4) & 0xff0) | |
1248 | + ((v[8] >> 4) & 0xf); | |
65efcfce | 1249 | |
d62a17ae | 1250 | l2o->local_nve_id = (uint8_t)v[10]; |
65efcfce | 1251 | |
d62a17ae | 1252 | l2o->logical_net_id = |
1253 | (v[11] << 16) + (v[12] << 8) + (v[13] << 0); | |
65efcfce | 1254 | |
d62a17ae | 1255 | return 0; |
1256 | } | |
1257 | } | |
1258 | return 1; | |
65efcfce LB |
1259 | } |
1260 | ||
1261 | static struct rfapi_next_hop_entry * | |
d62a17ae | 1262 | rfapiRouteInfo2NextHopEntry(struct rfapi_ip_prefix *rprefix, |
40381db7 DS |
1263 | struct bgp_path_info *bpi, /* route to encode */ |
1264 | uint32_t lifetime, /* use this in nhe */ | |
1265 | struct agg_node *rn) /* req for L2 eth addr */ | |
65efcfce | 1266 | { |
d62a17ae | 1267 | struct rfapi_next_hop_entry *new; |
1268 | int have_vnc_tunnel_un = 0; | |
26a3ffd6 | 1269 | const struct prefix *p = agg_node_get_prefix(rn); |
65efcfce | 1270 | |
1e20238a | 1271 | #ifdef DEBUG_ENCAP_MONITOR |
40381db7 | 1272 | vnc_zlog_debug_verbose("%s: entry, bpi %p, rn %p", __func__, bpi, rn); |
65efcfce LB |
1273 | #endif |
1274 | ||
d62a17ae | 1275 | new = XCALLOC(MTYPE_RFAPI_NEXTHOP, sizeof(struct rfapi_next_hop_entry)); |
d62a17ae | 1276 | |
1277 | new->prefix = *rprefix; | |
1278 | ||
40381db7 DS |
1279 | if (bpi->extra |
1280 | && decode_rd_type(bpi->extra->vnc.import.rd.val) | |
d62a17ae | 1281 | == RD_TYPE_VNC_ETH) { |
1282 | /* ethernet */ | |
1283 | ||
1284 | struct rfapi_vn_option *vo; | |
1285 | ||
1286 | vo = XCALLOC(MTYPE_RFAPI_VN_OPTION, | |
1287 | sizeof(struct rfapi_vn_option)); | |
d62a17ae | 1288 | |
1289 | vo->type = RFAPI_VN_OPTION_TYPE_L2ADDR; | |
1290 | ||
26a3ffd6 | 1291 | memcpy(&vo->v.l2addr.macaddr, &p->u.prefix_eth.octet, ETH_ALEN); |
d62a17ae | 1292 | /* only low 3 bytes of this are significant */ |
b53e67a3 | 1293 | (void)rfapiEcommunityGetLNI(bgp_attr_get_ecommunity(bpi->attr), |
05864da7 | 1294 | &vo->v.l2addr.logical_net_id); |
b53e67a3 DA |
1295 | (void)rfapiEcommunityGetEthernetTag( |
1296 | bgp_attr_get_ecommunity(bpi->attr), | |
1297 | &vo->v.l2addr.tag_id); | |
d62a17ae | 1298 | |
1299 | /* local_nve_id comes from lower byte of RD type */ | |
40381db7 | 1300 | vo->v.l2addr.local_nve_id = bpi->extra->vnc.import.rd.val[1]; |
d62a17ae | 1301 | |
1302 | /* label comes from MP_REACH_NLRI label */ | |
40381db7 | 1303 | vo->v.l2addr.label = decode_label(&bpi->extra->label[0]); |
d62a17ae | 1304 | |
1305 | new->vn_options = vo; | |
1306 | ||
1307 | /* | |
1308 | * If there is an auxiliary prefix (i.e., host IP address), | |
1309 | * use it as the nexthop prefix instead of the query prefix | |
1310 | */ | |
40381db7 DS |
1311 | if (bpi->extra->vnc.import.aux_prefix.family) { |
1312 | rfapiQprefix2Rprefix(&bpi->extra->vnc.import.aux_prefix, | |
d62a17ae | 1313 | &new->prefix); |
1314 | } | |
1315 | } | |
1316 | ||
05864da7 DS |
1317 | bgp_encap_types tun_type = BGP_ENCAP_TYPE_MPLS; /*Default*/ |
1318 | new->prefix.cost = rfapiRfpCost(bpi->attr); | |
d62a17ae | 1319 | |
05864da7 | 1320 | struct bgp_attr_encap_subtlv *pEncap; |
d62a17ae | 1321 | |
05864da7 DS |
1322 | switch (BGP_MP_NEXTHOP_FAMILY(bpi->attr->mp_nexthop_len)) { |
1323 | case AF_INET: | |
1324 | new->vn_address.addr_family = AF_INET; | |
1325 | new->vn_address.addr.v4 = bpi->attr->mp_nexthop_global_in; | |
1326 | break; | |
d62a17ae | 1327 | |
05864da7 DS |
1328 | case AF_INET6: |
1329 | new->vn_address.addr_family = AF_INET6; | |
1330 | new->vn_address.addr.v6 = bpi->attr->mp_nexthop_global; | |
1331 | break; | |
d62a17ae | 1332 | |
05864da7 DS |
1333 | default: |
1334 | zlog_warn("%s: invalid vpn nexthop length: %d", __func__, | |
1335 | bpi->attr->mp_nexthop_len); | |
1336 | rfapi_free_next_hop_list(new); | |
1337 | return NULL; | |
1338 | } | |
d62a17ae | 1339 | |
91ebf12c DS |
1340 | for (pEncap = bgp_attr_get_vnc_subtlvs(bpi->attr); pEncap; |
1341 | pEncap = pEncap->next) { | |
05864da7 DS |
1342 | switch (pEncap->type) { |
1343 | case BGP_VNC_SUBTLV_TYPE_LIFETIME: | |
1344 | /* use configured lifetime, not attr lifetime */ | |
1345 | break; | |
d62a17ae | 1346 | |
05864da7 DS |
1347 | default: |
1348 | zlog_warn("%s: unknown VNC option type %d", __func__, | |
1349 | pEncap->type); | |
d62a17ae | 1350 | |
05864da7 | 1351 | break; |
d62a17ae | 1352 | } |
05864da7 | 1353 | } |
d62a17ae | 1354 | |
05864da7 DS |
1355 | bgp_attr_extcom_tunnel_type(bpi->attr, &tun_type); |
1356 | if (tun_type == BGP_ENCAP_TYPE_MPLS) { | |
1357 | struct prefix p; | |
1358 | /* MPLS carries UN address in next hop */ | |
1359 | rfapiNexthop2Prefix(bpi->attr, &p); | |
c7ca5ccf | 1360 | if (p.family != AF_UNSPEC) { |
05864da7 DS |
1361 | rfapiQprefix2Raddr(&p, &new->un_address); |
1362 | have_vnc_tunnel_un = 1; | |
d62a17ae | 1363 | } |
05864da7 | 1364 | } |
d62a17ae | 1365 | |
05864da7 DS |
1366 | for (pEncap = bpi->attr->encap_subtlvs; pEncap; pEncap = pEncap->next) { |
1367 | switch (pEncap->type) { | |
1368 | case BGP_ENCAP_SUBTLV_TYPE_REMOTE_ENDPOINT: | |
1369 | /* | |
1370 | * Overrides ENCAP UN address, if any | |
1371 | */ | |
1372 | switch (pEncap->length) { | |
d62a17ae | 1373 | |
05864da7 DS |
1374 | case 8: |
1375 | new->un_address.addr_family = AF_INET; | |
1376 | memcpy(&new->un_address.addr.v4, pEncap->value, | |
1377 | 4); | |
1378 | have_vnc_tunnel_un = 1; | |
1379 | break; | |
d62a17ae | 1380 | |
05864da7 DS |
1381 | case 20: |
1382 | new->un_address.addr_family = AF_INET6; | |
1383 | memcpy(&new->un_address.addr.v6, pEncap->value, | |
1384 | 16); | |
1385 | have_vnc_tunnel_un = 1; | |
d62a17ae | 1386 | break; |
1387 | ||
1388 | default: | |
1389 | zlog_warn( | |
05864da7 DS |
1390 | "%s: invalid tunnel subtlv UN addr length (%d) for bpi %p", |
1391 | __func__, pEncap->length, bpi); | |
d62a17ae | 1392 | } |
05864da7 DS |
1393 | break; |
1394 | ||
1395 | default: | |
1396 | zlog_warn("%s: unknown Encap Attribute option type %d", | |
1397 | __func__, pEncap->type); | |
1398 | break; | |
d62a17ae | 1399 | } |
05864da7 | 1400 | } |
d62a17ae | 1401 | |
05864da7 | 1402 | new->un_options = rfapi_encap_tlv_to_un_option(bpi->attr); |
65efcfce | 1403 | |
1e20238a | 1404 | #ifdef DEBUG_ENCAP_MONITOR |
05864da7 DS |
1405 | vnc_zlog_debug_verbose("%s: line %d: have_vnc_tunnel_un=%d", __func__, |
1406 | __LINE__, have_vnc_tunnel_un); | |
65efcfce LB |
1407 | #endif |
1408 | ||
05864da7 DS |
1409 | if (!have_vnc_tunnel_un && bpi->extra) { |
1410 | /* | |
1411 | * use cached UN address from ENCAP route | |
1412 | */ | |
1413 | new->un_address.addr_family = bpi->extra->vnc.import.un_family; | |
1414 | switch (new->un_address.addr_family) { | |
1415 | case AF_INET: | |
1416 | new->un_address.addr.v4 = | |
1417 | bpi->extra->vnc.import.un.addr4; | |
1418 | break; | |
1419 | case AF_INET6: | |
1420 | new->un_address.addr.v6 = | |
1421 | bpi->extra->vnc.import.un.addr6; | |
1422 | break; | |
1423 | default: | |
1424 | zlog_warn("%s: invalid UN addr family (%d) for bpi %p", | |
1425 | __func__, new->un_address.addr_family, bpi); | |
1426 | rfapi_free_next_hop_list(new); | |
1427 | return NULL; | |
d62a17ae | 1428 | } |
1429 | } | |
1430 | ||
1431 | new->lifetime = lifetime; | |
1432 | return new; | |
65efcfce LB |
1433 | } |
1434 | ||
fe08ba7e | 1435 | int rfapiHasNonRemovedRoutes(struct agg_node *rn) |
65efcfce | 1436 | { |
40381db7 | 1437 | struct bgp_path_info *bpi; |
65efcfce | 1438 | |
40381db7 | 1439 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 1440 | struct prefix pfx; |
65efcfce | 1441 | |
40381db7 DS |
1442 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
1443 | && (bpi->extra && !rfapiGetUnAddrOfVpnBi(bpi, &pfx))) { | |
65efcfce | 1444 | |
d62a17ae | 1445 | return 1; |
1446 | } | |
1447 | } | |
1448 | return 0; | |
65efcfce LB |
1449 | } |
1450 | ||
1e20238a | 1451 | #ifdef DEBUG_IT_NODES |
d62a17ae | 1452 | /* |
65efcfce LB |
1453 | * DEBUG FUNCTION |
1454 | */ | |
fe08ba7e | 1455 | void rfapiDumpNode(struct agg_node *rn) |
65efcfce | 1456 | { |
40381db7 | 1457 | struct bgp_path_info *bpi; |
d62a17ae | 1458 | |
1459 | vnc_zlog_debug_verbose("%s: rn=%p", __func__, rn); | |
40381db7 | 1460 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 1461 | struct prefix pfx; |
40381db7 | 1462 | int ctrc = rfapiGetUnAddrOfVpnBi(bpi, &pfx); |
d62a17ae | 1463 | int nr; |
1464 | ||
40381db7 DS |
1465 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
1466 | && (bpi->extra && !ctrc)) { | |
d62a17ae | 1467 | |
1468 | nr = 1; | |
1469 | } else { | |
1470 | nr = 0; | |
1471 | } | |
1472 | ||
1473 | vnc_zlog_debug_verbose( | |
40381db7 DS |
1474 | " bpi=%p, nr=%d, flags=0x%x, extra=%p, ctrc=%d", bpi, |
1475 | nr, bpi->flags, bpi->extra, ctrc); | |
d62a17ae | 1476 | } |
65efcfce LB |
1477 | } |
1478 | #endif | |
1479 | ||
d62a17ae | 1480 | static int rfapiNhlAddNodeRoutes( |
fe08ba7e | 1481 | struct agg_node *rn, /* in */ |
d62a17ae | 1482 | struct rfapi_ip_prefix *rprefix, /* in */ |
1483 | uint32_t lifetime, /* in */ | |
1484 | int removed, /* in */ | |
1485 | struct rfapi_next_hop_entry **head, /* in/out */ | |
1486 | struct rfapi_next_hop_entry **tail, /* in/out */ | |
1487 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
fe08ba7e | 1488 | struct agg_node *rfd_rib_node, /* preload this NVE rib node */ |
d62a17ae | 1489 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1490 | { |
40381db7 | 1491 | struct bgp_path_info *bpi; |
d62a17ae | 1492 | struct rfapi_next_hop_entry *new; |
1493 | struct prefix pfx_un; | |
1494 | struct skiplist *seen_nexthops; | |
1495 | int count = 0; | |
26a3ffd6 DS |
1496 | const struct prefix *p = agg_node_get_prefix(rn); |
1497 | int is_l2 = (p->family == AF_ETHERNET); | |
d62a17ae | 1498 | |
fe08ba7e DS |
1499 | if (rfd_rib_node) { |
1500 | struct agg_table *atable = agg_get_table(rfd_rib_node); | |
84cc1207 PZ |
1501 | struct rfapi_descriptor *rfd; |
1502 | ||
fe08ba7e DS |
1503 | if (atable) { |
1504 | rfd = agg_get_table_info(atable); | |
84cc1207 | 1505 | |
fe08ba7e DS |
1506 | if (rfapiRibFTDFilterRecentPrefix(rfd, rn, |
1507 | pfx_target_original)) | |
1508 | return 0; | |
1509 | } | |
d62a17ae | 1510 | } |
1511 | ||
1512 | seen_nexthops = | |
63265b5c | 1513 | skiplist_new(0, vnc_prefix_cmp, prefix_free_lists); |
d62a17ae | 1514 | |
40381db7 | 1515 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 1516 | |
1517 | struct prefix pfx_vn; | |
1518 | struct prefix *newpfx; | |
1519 | ||
40381db7 | 1520 | if (removed && !CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
1e20238a | 1521 | #ifdef DEBUG_RETURNED_NHL |
d62a17ae | 1522 | vnc_zlog_debug_verbose( |
1523 | "%s: want holddown, this route not holddown, skip", | |
1524 | __func__); | |
65efcfce | 1525 | #endif |
d62a17ae | 1526 | continue; |
1527 | } | |
40381db7 | 1528 | if (!removed && CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
d62a17ae | 1529 | continue; |
1530 | } | |
1531 | ||
40381db7 | 1532 | if (!bpi->extra) { |
d62a17ae | 1533 | continue; |
1534 | } | |
1535 | ||
1536 | /* | |
1537 | * Check for excluded VN address | |
1538 | */ | |
40381db7 | 1539 | if (rfapiVpnBiNhEqualsPt(bpi, exclude_vnaddr)) |
d62a17ae | 1540 | continue; |
1541 | ||
1542 | /* | |
1543 | * Check for VN address (nexthop) copied already | |
1544 | */ | |
1545 | if (is_l2) { | |
1546 | /* L2 routes: semantic nexthop in aux_prefix; VN addr | |
1547 | * ain't it */ | |
40381db7 | 1548 | pfx_vn = bpi->extra->vnc.import.aux_prefix; |
d62a17ae | 1549 | } else { |
40381db7 | 1550 | rfapiNexthop2Prefix(bpi->attr, &pfx_vn); |
d62a17ae | 1551 | } |
1552 | if (!skiplist_search(seen_nexthops, &pfx_vn, NULL)) { | |
1e20238a | 1553 | #ifdef DEBUG_RETURNED_NHL |
d62a17ae | 1554 | vnc_zlog_debug_verbose( |
2dbe669b DA |
1555 | "%s: already put VN/nexthop %pFX, skip", |
1556 | __func__, &pfx_vn); | |
65efcfce | 1557 | #endif |
d62a17ae | 1558 | continue; |
1559 | } | |
65efcfce | 1560 | |
40381db7 | 1561 | if (rfapiGetUnAddrOfVpnBi(bpi, &pfx_un)) { |
1e20238a | 1562 | #ifdef DEBUG_ENCAP_MONITOR |
d62a17ae | 1563 | vnc_zlog_debug_verbose( |
40381db7 | 1564 | "%s: failed to get UN address of this VPN bpi", |
d62a17ae | 1565 | __func__); |
65efcfce | 1566 | #endif |
d62a17ae | 1567 | continue; |
1568 | } | |
1569 | ||
1570 | newpfx = prefix_new(); | |
1571 | *newpfx = pfx_vn; | |
1572 | skiplist_insert(seen_nexthops, newpfx, newpfx); | |
1573 | ||
40381db7 | 1574 | new = rfapiRouteInfo2NextHopEntry(rprefix, bpi, lifetime, rn); |
d62a17ae | 1575 | if (new) { |
1576 | if (rfapiRibPreloadBi(rfd_rib_node, &pfx_vn, &pfx_un, | |
40381db7 | 1577 | lifetime, bpi)) { |
d62a17ae | 1578 | /* duplicate filtered by RIB */ |
1579 | rfapi_free_next_hop_list(new); | |
1580 | new = NULL; | |
1581 | } | |
1582 | } | |
1583 | ||
1584 | if (new) { | |
1585 | if (*tail) { | |
1586 | (*tail)->next = new; | |
1587 | } else { | |
1588 | *head = new; | |
1589 | } | |
1590 | *tail = new; | |
1591 | ++count; | |
1592 | } | |
1593 | } | |
1594 | ||
1595 | skiplist_free(seen_nexthops); | |
1596 | ||
1597 | return count; | |
65efcfce LB |
1598 | } |
1599 | ||
1600 | ||
1601 | /* | |
1602 | * Breadth-first | |
1603 | * | |
1604 | * omit_node is meant for the situation where we are adding a subtree | |
1605 | * of a parent of some original requested node. The response already | |
1606 | * contains the original requested node, and we don't want to duplicate | |
1607 | * its routes in the list, so we skip it if the right or left node | |
1608 | * matches (of course, we still travel down its child subtrees). | |
1609 | */ | |
d62a17ae | 1610 | static int rfapiNhlAddSubtree( |
fe08ba7e | 1611 | struct agg_node *rn, /* in */ |
d62a17ae | 1612 | uint32_t lifetime, /* in */ |
1613 | struct rfapi_next_hop_entry **head, /* in/out */ | |
1614 | struct rfapi_next_hop_entry **tail, /* in/out */ | |
fe08ba7e | 1615 | struct agg_node *omit_node, /* in */ |
d62a17ae | 1616 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ |
fe08ba7e | 1617 | struct agg_table *rfd_rib_table, /* preload here */ |
d62a17ae | 1618 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1619 | { |
d62a17ae | 1620 | struct rfapi_ip_prefix rprefix; |
1621 | int rcount = 0; | |
1622 | ||
1623 | /* FIXME: need to find a better way here to work without sticking our | |
1624 | * hands in node->link */ | |
fe08ba7e DS |
1625 | if (agg_node_left(rn) && agg_node_left(rn) != omit_node) { |
1626 | if (agg_node_left(rn)->info) { | |
26a3ffd6 DS |
1627 | const struct prefix *p = |
1628 | agg_node_get_prefix(agg_node_left(rn)); | |
d62a17ae | 1629 | int count = 0; |
fe08ba7e | 1630 | struct agg_node *rib_rn = NULL; |
d62a17ae | 1631 | |
26a3ffd6 DS |
1632 | rfapiQprefix2Rprefix(p, &rprefix); |
1633 | if (rfd_rib_table) | |
1634 | rib_rn = agg_node_get(rfd_rib_table, p); | |
d62a17ae | 1635 | |
1636 | count = rfapiNhlAddNodeRoutes( | |
fe08ba7e DS |
1637 | agg_node_left(rn), &rprefix, lifetime, 0, head, |
1638 | tail, exclude_vnaddr, rib_rn, | |
1639 | pfx_target_original); | |
d62a17ae | 1640 | if (!count) { |
1641 | count = rfapiNhlAddNodeRoutes( | |
fe08ba7e DS |
1642 | agg_node_left(rn), &rprefix, lifetime, |
1643 | 1, head, tail, exclude_vnaddr, rib_rn, | |
d62a17ae | 1644 | pfx_target_original); |
1645 | } | |
1646 | rcount += count; | |
1647 | if (rib_rn) | |
fe08ba7e | 1648 | agg_unlock_node(rib_rn); |
d62a17ae | 1649 | } |
1650 | } | |
1651 | ||
fe08ba7e DS |
1652 | if (agg_node_right(rn) && agg_node_right(rn) != omit_node) { |
1653 | if (agg_node_right(rn)->info) { | |
26a3ffd6 DS |
1654 | const struct prefix *p = |
1655 | agg_node_get_prefix(agg_node_right(rn)); | |
d62a17ae | 1656 | int count = 0; |
fe08ba7e | 1657 | struct agg_node *rib_rn = NULL; |
d62a17ae | 1658 | |
26a3ffd6 DS |
1659 | rfapiQprefix2Rprefix(p, &rprefix); |
1660 | if (rfd_rib_table) | |
1661 | rib_rn = agg_node_get(rfd_rib_table, p); | |
1662 | ||
d62a17ae | 1663 | count = rfapiNhlAddNodeRoutes( |
fe08ba7e DS |
1664 | agg_node_right(rn), &rprefix, lifetime, 0, head, |
1665 | tail, exclude_vnaddr, rib_rn, | |
1666 | pfx_target_original); | |
d62a17ae | 1667 | if (!count) { |
1668 | count = rfapiNhlAddNodeRoutes( | |
fe08ba7e DS |
1669 | agg_node_right(rn), &rprefix, lifetime, |
1670 | 1, head, tail, exclude_vnaddr, rib_rn, | |
d62a17ae | 1671 | pfx_target_original); |
1672 | } | |
1673 | rcount += count; | |
1674 | if (rib_rn) | |
fe08ba7e | 1675 | agg_unlock_node(rib_rn); |
d62a17ae | 1676 | } |
1677 | } | |
1678 | ||
fe08ba7e | 1679 | if (agg_node_left(rn)) { |
d62a17ae | 1680 | rcount += rfapiNhlAddSubtree( |
fe08ba7e | 1681 | agg_node_left(rn), lifetime, head, tail, omit_node, |
d62a17ae | 1682 | exclude_vnaddr, rfd_rib_table, pfx_target_original); |
1683 | } | |
fe08ba7e | 1684 | if (agg_node_right(rn)) { |
d62a17ae | 1685 | rcount += rfapiNhlAddSubtree( |
fe08ba7e | 1686 | agg_node_right(rn), lifetime, head, tail, omit_node, |
d62a17ae | 1687 | exclude_vnaddr, rfd_rib_table, pfx_target_original); |
1688 | } | |
1689 | ||
1690 | return rcount; | |
65efcfce LB |
1691 | } |
1692 | ||
1693 | /* | |
1694 | * Implementation of ROUTE_LIST(node) from RFAPI-Import-Event-Handling.txt | |
1695 | * | |
1696 | * Construct an rfapi nexthop list based on the routes attached to | |
1697 | * the specified node. | |
1698 | * | |
1defdda8 DS |
1699 | * If there are any routes that do NOT have BGP_PATH_REMOVED set, |
1700 | * return those only. If there are ONLY routes with BGP_PATH_REMOVED, | |
65efcfce LB |
1701 | * then return those, and also include all the non-removed routes from the |
1702 | * next less-specific node (i.e., this node's parent) at the end. | |
1703 | */ | |
d62a17ae | 1704 | struct rfapi_next_hop_entry *rfapiRouteNode2NextHopList( |
fe08ba7e DS |
1705 | struct agg_node *rn, uint32_t lifetime, /* put into nexthop entries */ |
1706 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
1707 | struct agg_table *rfd_rib_table, /* preload here */ | |
1708 | struct prefix *pfx_target_original) /* query target */ | |
65efcfce | 1709 | { |
d62a17ae | 1710 | struct rfapi_ip_prefix rprefix; |
1711 | struct rfapi_next_hop_entry *answer = NULL; | |
1712 | struct rfapi_next_hop_entry *last = NULL; | |
fe08ba7e | 1713 | struct agg_node *parent; |
26a3ffd6 | 1714 | const struct prefix *p = agg_node_get_prefix(rn); |
d62a17ae | 1715 | int count = 0; |
fe08ba7e | 1716 | struct agg_node *rib_rn; |
65efcfce | 1717 | |
1e20238a | 1718 | #ifdef DEBUG_RETURNED_NHL |
26a3ffd6 | 1719 | vnc_zlog_debug_verbose("%s: called with node pfx=%rRN", __func__, rn); |
d62a17ae | 1720 | rfapiDebugBacktrace(); |
65efcfce LB |
1721 | #endif |
1722 | ||
26a3ffd6 | 1723 | rfapiQprefix2Rprefix(p, &rprefix); |
d62a17ae | 1724 | |
26a3ffd6 | 1725 | rib_rn = rfd_rib_table ? agg_node_get(rfd_rib_table, p) : NULL; |
d62a17ae | 1726 | |
1727 | /* | |
1728 | * Add non-withdrawn routes at this node | |
1729 | */ | |
1730 | count = rfapiNhlAddNodeRoutes(rn, &rprefix, lifetime, 0, &answer, &last, | |
1731 | exclude_vnaddr, rib_rn, | |
1732 | pfx_target_original); | |
1733 | ||
1734 | /* | |
1735 | * If the list has at least one entry, it's finished | |
1736 | */ | |
1737 | if (count) { | |
1738 | count += rfapiNhlAddSubtree(rn, lifetime, &answer, &last, NULL, | |
1739 | exclude_vnaddr, rfd_rib_table, | |
1740 | pfx_target_original); | |
1741 | vnc_zlog_debug_verbose("%s: %d nexthops, answer=%p", __func__, | |
1742 | count, answer); | |
1e20238a | 1743 | #ifdef DEBUG_RETURNED_NHL |
d62a17ae | 1744 | rfapiPrintNhl(NULL, answer); |
65efcfce | 1745 | #endif |
d62a17ae | 1746 | if (rib_rn) |
fe08ba7e | 1747 | agg_unlock_node(rib_rn); |
d62a17ae | 1748 | return answer; |
1749 | } | |
1750 | ||
1751 | /* | |
1752 | * Add withdrawn routes at this node | |
1753 | */ | |
1754 | count = rfapiNhlAddNodeRoutes(rn, &rprefix, lifetime, 1, &answer, &last, | |
1755 | exclude_vnaddr, rib_rn, | |
1756 | pfx_target_original); | |
1757 | if (rib_rn) | |
fe08ba7e | 1758 | agg_unlock_node(rib_rn); |
d62a17ae | 1759 | |
1760 | // rfapiPrintNhl(NULL, answer); | |
1761 | ||
1762 | /* | |
1763 | * walk up the tree until we find a node with non-deleted | |
1764 | * routes, then add them | |
1765 | */ | |
fe08ba7e DS |
1766 | for (parent = agg_node_parent(rn); parent; |
1767 | parent = agg_node_parent(parent)) { | |
d62a17ae | 1768 | if (rfapiHasNonRemovedRoutes(parent)) { |
1769 | break; | |
1770 | } | |
1771 | } | |
1772 | ||
1773 | /* | |
1774 | * Add non-withdrawn routes from less-specific prefix | |
1775 | */ | |
1776 | if (parent) { | |
26a3ffd6 DS |
1777 | const struct prefix *p = agg_node_get_prefix(parent); |
1778 | ||
1779 | rib_rn = rfd_rib_table ? agg_node_get(rfd_rib_table, p) : NULL; | |
1780 | rfapiQprefix2Rprefix(p, &rprefix); | |
d62a17ae | 1781 | count += rfapiNhlAddNodeRoutes(parent, &rprefix, lifetime, 0, |
1782 | &answer, &last, exclude_vnaddr, | |
1783 | rib_rn, pfx_target_original); | |
1784 | count += rfapiNhlAddSubtree(parent, lifetime, &answer, &last, | |
1785 | rn, exclude_vnaddr, rfd_rib_table, | |
1786 | pfx_target_original); | |
1787 | if (rib_rn) | |
fe08ba7e | 1788 | agg_unlock_node(rib_rn); |
d62a17ae | 1789 | } else { |
1790 | /* | |
1791 | * There is no parent with non-removed routes. Still need to | |
1792 | * add subtree of original node if it contributed routes to the | |
1793 | * answer. | |
1794 | */ | |
1795 | if (count) | |
1796 | count += rfapiNhlAddSubtree(rn, lifetime, &answer, | |
1797 | &last, rn, exclude_vnaddr, | |
1798 | rfd_rib_table, | |
1799 | pfx_target_original); | |
1800 | } | |
1801 | ||
1802 | vnc_zlog_debug_verbose("%s: %d nexthops, answer=%p", __func__, count, | |
1803 | answer); | |
1e20238a | 1804 | #ifdef DEBUG_RETURNED_NHL |
d62a17ae | 1805 | rfapiPrintNhl(NULL, answer); |
65efcfce | 1806 | #endif |
d62a17ae | 1807 | return answer; |
65efcfce LB |
1808 | } |
1809 | ||
1810 | /* | |
1811 | * Construct nexthop list of all routes in table | |
1812 | */ | |
d62a17ae | 1813 | struct rfapi_next_hop_entry *rfapiRouteTable2NextHopList( |
fe08ba7e DS |
1814 | struct agg_table *rt, uint32_t lifetime, /* put into nexthop entries */ |
1815 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
1816 | struct agg_table *rfd_rib_table, /* preload this NVE rib table */ | |
1817 | struct prefix *pfx_target_original) /* query target */ | |
65efcfce | 1818 | { |
fe08ba7e | 1819 | struct agg_node *rn; |
d62a17ae | 1820 | struct rfapi_next_hop_entry *biglist = NULL; |
1821 | struct rfapi_next_hop_entry *nhl; | |
1822 | struct rfapi_next_hop_entry *tail = NULL; | |
1823 | int count = 0; | |
1824 | ||
fe08ba7e | 1825 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
d62a17ae | 1826 | |
1827 | nhl = rfapiRouteNode2NextHopList(rn, lifetime, exclude_vnaddr, | |
1828 | rfd_rib_table, | |
1829 | pfx_target_original); | |
1830 | if (!tail) { | |
1831 | tail = biglist = nhl; | |
1832 | if (tail) | |
1833 | count = 1; | |
1834 | } else { | |
1835 | tail->next = nhl; | |
1836 | } | |
1837 | if (tail) { | |
1838 | while (tail->next) { | |
1839 | ++count; | |
1840 | tail = tail->next; | |
1841 | } | |
1842 | } | |
1843 | } | |
1844 | ||
1845 | vnc_zlog_debug_verbose("%s: returning %d routes", __func__, count); | |
1846 | return biglist; | |
65efcfce LB |
1847 | } |
1848 | ||
d62a17ae | 1849 | struct rfapi_next_hop_entry *rfapiEthRouteNode2NextHopList( |
fe08ba7e | 1850 | struct agg_node *rn, struct rfapi_ip_prefix *rprefix, |
d62a17ae | 1851 | uint32_t lifetime, /* put into nexthop entries */ |
1852 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
fe08ba7e | 1853 | struct agg_table *rfd_rib_table, /* preload NVE rib table */ |
d62a17ae | 1854 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1855 | { |
d62a17ae | 1856 | int count = 0; |
1857 | struct rfapi_next_hop_entry *answer = NULL; | |
1858 | struct rfapi_next_hop_entry *last = NULL; | |
fe08ba7e | 1859 | struct agg_node *rib_rn; |
65efcfce | 1860 | |
26a3ffd6 DS |
1861 | rib_rn = rfd_rib_table |
1862 | ? agg_node_get(rfd_rib_table, agg_node_get_prefix(rn)) | |
1863 | : NULL; | |
65efcfce | 1864 | |
d62a17ae | 1865 | count = rfapiNhlAddNodeRoutes(rn, rprefix, lifetime, 0, &answer, &last, |
1866 | NULL, rib_rn, pfx_target_original); | |
65efcfce | 1867 | |
1e20238a | 1868 | #ifdef DEBUG_ENCAP_MONITOR |
d62a17ae | 1869 | vnc_zlog_debug_verbose("%s: node %p: %d non-holddown routes", __func__, |
1870 | rn, count); | |
65efcfce LB |
1871 | #endif |
1872 | ||
d62a17ae | 1873 | if (!count) { |
1874 | count = rfapiNhlAddNodeRoutes(rn, rprefix, lifetime, 1, &answer, | |
1875 | &last, exclude_vnaddr, rib_rn, | |
1876 | pfx_target_original); | |
1877 | vnc_zlog_debug_verbose("%s: node %p: %d holddown routes", | |
1878 | __func__, rn, count); | |
1879 | } | |
65efcfce | 1880 | |
d62a17ae | 1881 | if (rib_rn) |
fe08ba7e | 1882 | agg_unlock_node(rib_rn); |
65efcfce | 1883 | |
1e20238a | 1884 | #ifdef DEBUG_RETURNED_NHL |
d62a17ae | 1885 | rfapiPrintNhl(NULL, answer); |
65efcfce LB |
1886 | #endif |
1887 | ||
d62a17ae | 1888 | return answer; |
65efcfce LB |
1889 | } |
1890 | ||
1891 | ||
1892 | /* | |
1893 | * Construct nexthop list of all routes in table | |
1894 | */ | |
d62a17ae | 1895 | struct rfapi_next_hop_entry *rfapiEthRouteTable2NextHopList( |
1896 | uint32_t logical_net_id, struct rfapi_ip_prefix *rprefix, | |
1897 | uint32_t lifetime, /* put into nexthop entries */ | |
1898 | struct rfapi_ip_addr *exclude_vnaddr, /* omit routes to same NVE */ | |
fe08ba7e | 1899 | struct agg_table *rfd_rib_table, /* preload NVE rib node */ |
d62a17ae | 1900 | struct prefix *pfx_target_original) /* query target */ |
65efcfce | 1901 | { |
d62a17ae | 1902 | struct rfapi_import_table *it; |
1903 | struct bgp *bgp = bgp_get_default(); | |
fe08ba7e DS |
1904 | struct agg_table *rt; |
1905 | struct agg_node *rn; | |
d62a17ae | 1906 | struct rfapi_next_hop_entry *biglist = NULL; |
1907 | struct rfapi_next_hop_entry *nhl; | |
1908 | struct rfapi_next_hop_entry *tail = NULL; | |
1909 | int count = 0; | |
1910 | ||
1911 | ||
1912 | it = rfapiMacImportTableGet(bgp, logical_net_id); | |
1913 | rt = it->imported_vpn[AFI_L2VPN]; | |
1914 | ||
fe08ba7e | 1915 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
d62a17ae | 1916 | |
1917 | nhl = rfapiEthRouteNode2NextHopList( | |
1918 | rn, rprefix, lifetime, exclude_vnaddr, rfd_rib_table, | |
1919 | pfx_target_original); | |
1920 | if (!tail) { | |
1921 | tail = biglist = nhl; | |
1922 | if (tail) | |
1923 | count = 1; | |
1924 | } else { | |
1925 | tail->next = nhl; | |
1926 | } | |
1927 | if (tail) { | |
1928 | while (tail->next) { | |
1929 | ++count; | |
1930 | tail = tail->next; | |
1931 | } | |
1932 | } | |
1933 | } | |
1934 | ||
1935 | vnc_zlog_debug_verbose("%s: returning %d routes", __func__, count); | |
1936 | return biglist; | |
65efcfce LB |
1937 | } |
1938 | ||
1939 | /* | |
40381db7 DS |
1940 | * Insert a new bpi to the imported route table node, |
1941 | * keeping the list of BPIs sorted best route first | |
65efcfce | 1942 | */ |
fe08ba7e | 1943 | static void rfapiBgpInfoAttachSorted(struct agg_node *rn, |
4b7e6066 | 1944 | struct bgp_path_info *info_new, afi_t afi, |
d62a17ae | 1945 | safi_t safi) |
65efcfce | 1946 | { |
d62a17ae | 1947 | struct bgp *bgp; |
4b7e6066 DS |
1948 | struct bgp_path_info *prev; |
1949 | struct bgp_path_info *next; | |
d62a17ae | 1950 | char pfx_buf[PREFIX2STR_BUFFER]; |
1951 | ||
1952 | ||
1953 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
1954 | ||
1955 | if (VNC_DEBUG(IMPORT_BI_ATTACH)) { | |
1956 | vnc_zlog_debug_verbose("%s: info_new->peer=%p", __func__, | |
1957 | info_new->peer); | |
1958 | vnc_zlog_debug_verbose("%s: info_new->peer->su_remote=%p", | |
1959 | __func__, info_new->peer->su_remote); | |
1960 | } | |
1961 | ||
1962 | for (prev = NULL, next = rn->info; next; | |
1963 | prev = next, next = next->next) { | |
fdf81fa0 DS |
1964 | enum bgp_path_selection_reason reason; |
1965 | ||
1defdda8 DS |
1966 | if (!bgp |
1967 | || (!CHECK_FLAG(info_new->flags, BGP_PATH_REMOVED) | |
1968 | && CHECK_FLAG(next->flags, BGP_PATH_REMOVED)) | |
18ee8310 | 1969 | || bgp_path_info_cmp_compatible(bgp, info_new, next, |
fdf81fa0 DS |
1970 | pfx_buf, afi, safi, |
1971 | &reason) | |
d62a17ae | 1972 | == -1) { /* -1 if 1st is better */ |
1973 | break; | |
1974 | } | |
1975 | } | |
1976 | vnc_zlog_debug_verbose("%s: prev=%p, next=%p", __func__, prev, next); | |
1977 | if (prev) { | |
1978 | prev->next = info_new; | |
1979 | } else { | |
1980 | rn->info = info_new; | |
1981 | } | |
1982 | info_new->prev = prev; | |
1983 | info_new->next = next; | |
1984 | if (next) | |
1985 | next->prev = info_new; | |
1986 | bgp_attr_intern(info_new->attr); | |
65efcfce LB |
1987 | } |
1988 | ||
40381db7 | 1989 | static void rfapiBgpInfoDetach(struct agg_node *rn, struct bgp_path_info *bpi) |
65efcfce | 1990 | { |
d62a17ae | 1991 | /* |
1992 | * Remove the route (doubly-linked) | |
1993 | */ | |
40381db7 DS |
1994 | // bgp_attr_unintern (&bpi->attr); |
1995 | if (bpi->next) | |
1996 | bpi->next->prev = bpi->prev; | |
1997 | if (bpi->prev) | |
1998 | bpi->prev->next = bpi->next; | |
d62a17ae | 1999 | else |
40381db7 | 2000 | rn->info = bpi->next; |
65efcfce LB |
2001 | } |
2002 | ||
2003 | /* | |
2004 | * For L3-indexed import tables | |
2005 | */ | |
1a4189d4 | 2006 | static int rfapi_bi_peer_rd_cmp(const void *b1, const void *b2) |
65efcfce | 2007 | { |
1a4189d4 DS |
2008 | const struct bgp_path_info *bpi1 = b1; |
2009 | const struct bgp_path_info *bpi2 = b2; | |
d62a17ae | 2010 | |
2011 | /* | |
2012 | * Compare peers | |
2013 | */ | |
40381db7 | 2014 | if (bpi1->peer < bpi2->peer) |
d62a17ae | 2015 | return -1; |
40381db7 | 2016 | if (bpi1->peer > bpi2->peer) |
d62a17ae | 2017 | return 1; |
2018 | ||
2019 | /* | |
2020 | * compare RDs | |
2021 | */ | |
1a4189d4 DS |
2022 | return vnc_prefix_cmp( |
2023 | (const struct prefix *)&bpi1->extra->vnc.import.rd, | |
2024 | (const struct prefix *)&bpi2->extra->vnc.import.rd); | |
65efcfce LB |
2025 | } |
2026 | ||
2027 | /* | |
2028 | * For L2-indexed import tables | |
40381db7 | 2029 | * The BPIs in these tables should ALWAYS have an aux_prefix set because |
65efcfce LB |
2030 | * they arrive via IPv4 or IPv6 advertisements. |
2031 | */ | |
1a4189d4 | 2032 | static int rfapi_bi_peer_rd_aux_cmp(const void *b1, const void *b2) |
65efcfce | 2033 | { |
1a4189d4 DS |
2034 | const struct bgp_path_info *bpi1 = b1; |
2035 | const struct bgp_path_info *bpi2 = b2; | |
d62a17ae | 2036 | int rc; |
2037 | ||
2038 | /* | |
2039 | * Compare peers | |
2040 | */ | |
40381db7 | 2041 | if (bpi1->peer < bpi2->peer) |
d62a17ae | 2042 | return -1; |
40381db7 | 2043 | if (bpi1->peer > bpi2->peer) |
d62a17ae | 2044 | return 1; |
2045 | ||
2046 | /* | |
2047 | * compare RDs | |
2048 | */ | |
40381db7 DS |
2049 | rc = vnc_prefix_cmp((struct prefix *)&bpi1->extra->vnc.import.rd, |
2050 | (struct prefix *)&bpi2->extra->vnc.import.rd); | |
d62a17ae | 2051 | if (rc) { |
2052 | return rc; | |
2053 | } | |
2054 | ||
2055 | /* | |
2056 | * L2 import tables can have multiple entries with the | |
2057 | * same MAC address, same RD, but different L3 addresses. | |
2058 | * | |
2059 | * Use presence of aux_prefix with AF=ethernet and prefixlen=1 | |
2060 | * as magic value to signify explicit wildcarding of the aux_prefix. | |
40381db7 DS |
2061 | * This magic value will not appear in bona fide bpi entries in |
2062 | * the import table, but is allowed in the "fake" bpi used to | |
d62a17ae | 2063 | * probe the table when searching. (We have to test both b1 and b2 |
2064 | * because there is no guarantee of the order the test key and | |
2065 | * the real key will be passed) | |
2066 | */ | |
40381db7 DS |
2067 | if ((bpi1->extra->vnc.import.aux_prefix.family == AF_ETHERNET |
2068 | && (bpi1->extra->vnc.import.aux_prefix.prefixlen == 1)) | |
2069 | || (bpi2->extra->vnc.import.aux_prefix.family == AF_ETHERNET | |
2070 | && (bpi2->extra->vnc.import.aux_prefix.prefixlen == 1))) { | |
d62a17ae | 2071 | |
2072 | /* | |
2073 | * wildcard aux address specified | |
2074 | */ | |
2075 | return 0; | |
2076 | } | |
2077 | ||
40381db7 DS |
2078 | return vnc_prefix_cmp(&bpi1->extra->vnc.import.aux_prefix, |
2079 | &bpi2->extra->vnc.import.aux_prefix); | |
65efcfce LB |
2080 | } |
2081 | ||
2082 | ||
2083 | /* | |
2084 | * Index on RD and Peer | |
2085 | */ | |
fe08ba7e | 2086 | static void rfapiItBiIndexAdd(struct agg_node *rn, /* Import table VPN node */ |
40381db7 | 2087 | struct bgp_path_info *bpi) /* new BPI */ |
65efcfce | 2088 | { |
d62a17ae | 2089 | struct skiplist *sl; |
26a3ffd6 | 2090 | const struct prefix *p; |
d62a17ae | 2091 | |
2092 | assert(rn); | |
40381db7 DS |
2093 | assert(bpi); |
2094 | assert(bpi->extra); | |
d62a17ae | 2095 | |
2096 | { | |
06b9f471 DS |
2097 | char buf[RD_ADDRSTRLEN]; |
2098 | ||
40381db7 DS |
2099 | vnc_zlog_debug_verbose("%s: bpi %p, peer %p, rd %s", __func__, |
2100 | bpi, bpi->peer, | |
2101 | prefix_rd2str(&bpi->extra->vnc.import.rd, | |
06b9f471 | 2102 | buf, sizeof(buf))); |
d62a17ae | 2103 | } |
2104 | ||
2105 | sl = RFAPI_RDINDEX_W_ALLOC(rn); | |
2106 | if (!sl) { | |
26a3ffd6 DS |
2107 | p = agg_node_get_prefix(rn); |
2108 | if (AF_ETHERNET == p->family) { | |
d62a17ae | 2109 | sl = skiplist_new(0, rfapi_bi_peer_rd_aux_cmp, NULL); |
2110 | } else { | |
2111 | sl = skiplist_new(0, rfapi_bi_peer_rd_cmp, NULL); | |
2112 | } | |
2113 | RFAPI_IT_EXTRA_GET(rn)->u.vpn.idx_rd = sl; | |
fe08ba7e | 2114 | agg_lock_node(rn); /* for skiplist */ |
d62a17ae | 2115 | } |
40381db7 | 2116 | assert(!skiplist_insert(sl, (void *)bpi, (void *)bpi)); |
fe08ba7e | 2117 | agg_lock_node(rn); /* for skiplist entry */ |
d62a17ae | 2118 | |
40381db7 | 2119 | /* NB: BPIs in import tables are not refcounted */ |
65efcfce LB |
2120 | } |
2121 | ||
fe08ba7e | 2122 | static void rfapiItBiIndexDump(struct agg_node *rn) |
65efcfce | 2123 | { |
d62a17ae | 2124 | struct skiplist *sl; |
2125 | void *cursor = NULL; | |
4b7e6066 DS |
2126 | struct bgp_path_info *k; |
2127 | struct bgp_path_info *v; | |
d62a17ae | 2128 | int rc; |
2129 | ||
2130 | sl = RFAPI_RDINDEX(rn); | |
2131 | if (!sl) | |
2132 | return; | |
2133 | ||
2134 | for (rc = skiplist_next(sl, (void **)&k, (void **)&v, &cursor); !rc; | |
2135 | rc = skiplist_next(sl, (void **)&k, (void **)&v, &cursor)) { | |
2136 | ||
06b9f471 | 2137 | char buf[RD_ADDRSTRLEN]; |
872ed4c7 | 2138 | char buf_aux_pfx[PREFIX_STRLEN]; |
d62a17ae | 2139 | |
06b9f471 | 2140 | prefix_rd2str(&k->extra->vnc.import.rd, buf, sizeof(buf)); |
d62a17ae | 2141 | if (k->extra->vnc.import.aux_prefix.family) { |
2142 | prefix2str(&k->extra->vnc.import.aux_prefix, | |
06b9f471 DS |
2143 | buf_aux_pfx, sizeof(buf_aux_pfx)); |
2144 | } else | |
9825c71e | 2145 | strlcpy(buf_aux_pfx, "(none)", sizeof(buf_aux_pfx)); |
d62a17ae | 2146 | |
40381db7 | 2147 | vnc_zlog_debug_verbose("bpi %p, peer %p, rd %s, aux_prefix %s", |
d62a17ae | 2148 | k, k->peer, buf, buf_aux_pfx); |
2149 | } | |
65efcfce LB |
2150 | } |
2151 | ||
4b7e6066 | 2152 | static struct bgp_path_info *rfapiItBiIndexSearch( |
fe08ba7e | 2153 | struct agg_node *rn, /* Import table VPN node */ |
d62a17ae | 2154 | struct prefix_rd *prd, struct peer *peer, |
5a1ae2c2 | 2155 | const struct prefix *aux_prefix) /* optional L3 addr for L2 ITs */ |
65efcfce | 2156 | { |
d62a17ae | 2157 | struct skiplist *sl; |
2158 | int rc; | |
b8694ef4 DS |
2159 | struct bgp_path_info bpi_fake = {0}; |
2160 | struct bgp_path_info_extra bpi_extra = {0}; | |
40381db7 | 2161 | struct bgp_path_info *bpi_result; |
65efcfce | 2162 | |
d62a17ae | 2163 | sl = RFAPI_RDINDEX(rn); |
2164 | if (!sl) | |
2165 | return NULL; | |
65efcfce | 2166 | |
1e20238a | 2167 | #ifdef DEBUG_BI_SEARCH |
d62a17ae | 2168 | { |
06b9f471 | 2169 | char buf[RD_ADDRSTRLEN]; |
872ed4c7 | 2170 | char buf_aux_pfx[PREFIX_STRLEN]; |
d62a17ae | 2171 | |
d62a17ae | 2172 | if (aux_prefix) { |
872ed4c7 DS |
2173 | prefix2str(aux_prefix, buf_aux_pfx, |
2174 | sizeof(buf_aux_pfx)); | |
06b9f471 | 2175 | } else |
9825c71e | 2176 | strlcpy(buf_aux_pfx, "(nil)", sizeof(buf_aux_pfx)); |
d62a17ae | 2177 | |
2178 | vnc_zlog_debug_verbose("%s want prd=%s, peer=%p, aux_prefix=%s", | |
06b9f471 DS |
2179 | __func__, |
2180 | prefix_rd2str(prd, buf, sizeof(buf)), | |
2181 | peer, buf_aux_pfx); | |
d62a17ae | 2182 | rfapiItBiIndexDump(rn); |
2183 | } | |
65efcfce LB |
2184 | #endif |
2185 | ||
d62a17ae | 2186 | /* threshold is a WAG */ |
2187 | if (sl->count < 3) { | |
1e20238a | 2188 | #ifdef DEBUG_BI_SEARCH |
d62a17ae | 2189 | vnc_zlog_debug_verbose("%s: short list algorithm", __func__); |
65efcfce | 2190 | #endif |
d62a17ae | 2191 | /* if short list, linear search might be faster */ |
40381db7 DS |
2192 | for (bpi_result = rn->info; bpi_result; |
2193 | bpi_result = bpi_result->next) { | |
1e20238a | 2194 | #ifdef DEBUG_BI_SEARCH |
d62a17ae | 2195 | { |
06b9f471 DS |
2196 | char buf[RD_ADDRSTRLEN]; |
2197 | ||
d62a17ae | 2198 | vnc_zlog_debug_verbose( |
40381db7 DS |
2199 | "%s: bpi has prd=%s, peer=%p", __func__, |
2200 | prefix_rd2str(&bpi_result->extra->vnc | |
996c9314 LB |
2201 | .import.rd, |
2202 | buf, sizeof(buf)), | |
40381db7 | 2203 | bpi_result->peer); |
d62a17ae | 2204 | } |
65efcfce | 2205 | #endif |
40381db7 DS |
2206 | if (peer == bpi_result->peer |
2207 | && !prefix_cmp((struct prefix *)&bpi_result->extra | |
d62a17ae | 2208 | ->vnc.import.rd, |
2209 | (struct prefix *)prd)) { | |
65efcfce | 2210 | |
1e20238a | 2211 | #ifdef DEBUG_BI_SEARCH |
d62a17ae | 2212 | vnc_zlog_debug_verbose( |
2213 | "%s: peer and RD same, doing aux_prefix check", | |
2214 | __func__); | |
65efcfce | 2215 | #endif |
d62a17ae | 2216 | if (!aux_prefix |
40381db7 DS |
2217 | || !prefix_cmp( |
2218 | aux_prefix, | |
2219 | &bpi_result->extra->vnc.import | |
2220 | .aux_prefix)) { | |
65efcfce | 2221 | |
1e20238a | 2222 | #ifdef DEBUG_BI_SEARCH |
d62a17ae | 2223 | vnc_zlog_debug_verbose("%s: match", |
2224 | __func__); | |
65efcfce | 2225 | #endif |
d62a17ae | 2226 | break; |
2227 | } | |
2228 | } | |
2229 | } | |
40381db7 | 2230 | return bpi_result; |
d62a17ae | 2231 | } |
2232 | ||
40381db7 DS |
2233 | bpi_fake.peer = peer; |
2234 | bpi_fake.extra = &bpi_extra; | |
c4efd0f4 | 2235 | bpi_fake.extra->vnc.import.rd = *prd; |
d62a17ae | 2236 | if (aux_prefix) { |
40381db7 | 2237 | bpi_fake.extra->vnc.import.aux_prefix = *aux_prefix; |
d62a17ae | 2238 | } else { |
2239 | /* wildcard */ | |
40381db7 DS |
2240 | bpi_fake.extra->vnc.import.aux_prefix.family = AF_ETHERNET; |
2241 | bpi_fake.extra->vnc.import.aux_prefix.prefixlen = 1; | |
d62a17ae | 2242 | } |
2243 | ||
40381db7 | 2244 | rc = skiplist_search(sl, (void *)&bpi_fake, (void *)&bpi_result); |
d62a17ae | 2245 | |
2246 | if (rc) { | |
1e20238a | 2247 | #ifdef DEBUG_BI_SEARCH |
d62a17ae | 2248 | vnc_zlog_debug_verbose("%s: no match", __func__); |
65efcfce | 2249 | #endif |
d62a17ae | 2250 | return NULL; |
2251 | } | |
65efcfce | 2252 | |
1e20238a | 2253 | #ifdef DEBUG_BI_SEARCH |
40381db7 | 2254 | vnc_zlog_debug_verbose("%s: matched bpi=%p", __func__, bpi_result); |
65efcfce LB |
2255 | #endif |
2256 | ||
40381db7 | 2257 | return bpi_result; |
65efcfce LB |
2258 | } |
2259 | ||
fe08ba7e | 2260 | static void rfapiItBiIndexDel(struct agg_node *rn, /* Import table VPN node */ |
40381db7 | 2261 | struct bgp_path_info *bpi) /* old BPI */ |
65efcfce | 2262 | { |
d62a17ae | 2263 | struct skiplist *sl; |
2264 | int rc; | |
65efcfce | 2265 | |
d62a17ae | 2266 | { |
06b9f471 DS |
2267 | char buf[RD_ADDRSTRLEN]; |
2268 | ||
40381db7 DS |
2269 | vnc_zlog_debug_verbose("%s: bpi %p, peer %p, rd %s", __func__, |
2270 | bpi, bpi->peer, | |
2271 | prefix_rd2str(&bpi->extra->vnc.import.rd, | |
06b9f471 | 2272 | buf, sizeof(buf))); |
d62a17ae | 2273 | } |
65efcfce | 2274 | |
d62a17ae | 2275 | sl = RFAPI_RDINDEX(rn); |
2276 | assert(sl); | |
65efcfce | 2277 | |
40381db7 | 2278 | rc = skiplist_delete(sl, (void *)(bpi), (void *)bpi); |
d62a17ae | 2279 | if (rc) { |
2280 | rfapiItBiIndexDump(rn); | |
2281 | } | |
2282 | assert(!rc); | |
65efcfce | 2283 | |
fe08ba7e | 2284 | agg_unlock_node(rn); /* for skiplist entry */ |
65efcfce | 2285 | |
40381db7 | 2286 | /* NB: BPIs in import tables are not refcounted */ |
65efcfce LB |
2287 | } |
2288 | ||
2289 | /* | |
2290 | * Add a backreference at the ENCAP node to the VPN route that | |
2291 | * refers to it | |
2292 | */ | |
4b7e6066 DS |
2293 | static void |
2294 | rfapiMonitorEncapAdd(struct rfapi_import_table *import_table, | |
40381db7 DS |
2295 | struct prefix *p, /* VN address */ |
2296 | struct agg_node *vpn_rn, /* VPN node */ | |
2297 | struct bgp_path_info *vpn_bpi) /* VPN bpi/route */ | |
65efcfce | 2298 | { |
d62a17ae | 2299 | afi_t afi = family2afi(p->family); |
fe08ba7e | 2300 | struct agg_node *rn; |
d62a17ae | 2301 | struct rfapi_monitor_encap *m; |
2302 | ||
2303 | assert(afi); | |
fe08ba7e | 2304 | rn = agg_node_get(import_table->imported_encap[afi], p); /* locks rn */ |
d62a17ae | 2305 | assert(rn); |
2306 | ||
2307 | m = XCALLOC(MTYPE_RFAPI_MONITOR_ENCAP, | |
2308 | sizeof(struct rfapi_monitor_encap)); | |
d62a17ae | 2309 | |
2310 | m->node = vpn_rn; | |
40381db7 | 2311 | m->bpi = vpn_bpi; |
d62a17ae | 2312 | m->rn = rn; |
2313 | ||
2314 | /* insert to encap node's list */ | |
2315 | m->next = RFAPI_MONITOR_ENCAP(rn); | |
2316 | if (m->next) | |
2317 | m->next->prev = m; | |
2318 | RFAPI_MONITOR_ENCAP_W_ALLOC(rn) = m; | |
2319 | ||
2320 | /* for easy lookup when deleting vpn route */ | |
40381db7 | 2321 | vpn_bpi->extra->vnc.import.hme = m; |
d62a17ae | 2322 | |
2323 | vnc_zlog_debug_verbose( | |
40381db7 DS |
2324 | "%s: it=%p, vpn_bpi=%p, afi=%d, encap rn=%p, setting vpn_bpi->extra->vnc.import.hme=%p", |
2325 | __func__, import_table, vpn_bpi, afi, rn, m); | |
d62a17ae | 2326 | |
2327 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, 0); | |
40381db7 | 2328 | bgp_attr_intern(vpn_bpi->attr); |
65efcfce LB |
2329 | } |
2330 | ||
40381db7 | 2331 | static void rfapiMonitorEncapDelete(struct bgp_path_info *vpn_bpi) |
65efcfce | 2332 | { |
d62a17ae | 2333 | /* |
2334 | * Remove encap monitor | |
2335 | */ | |
40381db7 DS |
2336 | vnc_zlog_debug_verbose("%s: vpn_bpi=%p", __func__, vpn_bpi); |
2337 | if (vpn_bpi->extra) { | |
2338 | struct rfapi_monitor_encap *hme = | |
2339 | vpn_bpi->extra->vnc.import.hme; | |
d62a17ae | 2340 | |
2341 | if (hme) { | |
2342 | ||
2343 | vnc_zlog_debug_verbose("%s: hme=%p", __func__, hme); | |
2344 | ||
2345 | /* Refcount checking takes too long here */ | |
2346 | // RFAPI_CHECK_REFCOUNT(hme->rn, SAFI_ENCAP, 0); | |
2347 | if (hme->next) | |
2348 | hme->next->prev = hme->prev; | |
2349 | if (hme->prev) | |
2350 | hme->prev->next = hme->next; | |
2351 | else | |
2352 | RFAPI_MONITOR_ENCAP_W_ALLOC(hme->rn) = | |
2353 | hme->next; | |
2354 | /* Refcount checking takes too long here */ | |
2355 | // RFAPI_CHECK_REFCOUNT(hme->rn, SAFI_ENCAP, 1); | |
2356 | ||
2357 | /* see if the struct rfapi_it_extra is empty and can be | |
2358 | * freed */ | |
2359 | rfapiMonitorExtraPrune(SAFI_ENCAP, hme->rn); | |
2360 | ||
fe08ba7e | 2361 | agg_unlock_node(hme->rn); /* decr ref count */ |
d62a17ae | 2362 | XFREE(MTYPE_RFAPI_MONITOR_ENCAP, hme); |
40381db7 | 2363 | vpn_bpi->extra->vnc.import.hme = NULL; |
d62a17ae | 2364 | } |
2365 | } | |
65efcfce LB |
2366 | } |
2367 | ||
2368 | /* | |
2369 | * quagga lib/thread.h says this must return int even though | |
2370 | * it doesn't do anything with the return value | |
2371 | */ | |
cc9f21da | 2372 | static void rfapiWithdrawTimerVPN(struct thread *t) |
65efcfce | 2373 | { |
d62a17ae | 2374 | struct rfapi_withdraw *wcb = t->arg; |
40381db7 | 2375 | struct bgp_path_info *bpi = wcb->info; |
d62a17ae | 2376 | struct bgp *bgp = bgp_get_default(); |
26a3ffd6 | 2377 | const struct prefix *p; |
d62a17ae | 2378 | struct rfapi_monitor_vpn *moved; |
2379 | afi_t afi; | |
2380 | ||
f4c713ae LB |
2381 | if (bgp == NULL) { |
2382 | vnc_zlog_debug_verbose( | |
2383 | "%s: NULL BGP pointer, assume shutdown race condition!!!", | |
2384 | __func__); | |
cc9f21da | 2385 | return; |
f4c713ae | 2386 | } |
892fedb6 | 2387 | if (CHECK_FLAG(bgp->flags, BGP_FLAG_DELETE_IN_PROGRESS)) { |
f4c713ae | 2388 | vnc_zlog_debug_verbose( |
892fedb6 DA |
2389 | "%s: BGP delete in progress, assume shutdown race condition!!!", |
2390 | __func__); | |
cc9f21da | 2391 | return; |
f4c713ae | 2392 | } |
d62a17ae | 2393 | assert(wcb->node); |
40381db7 | 2394 | assert(bpi); |
d62a17ae | 2395 | assert(wcb->import_table); |
40381db7 | 2396 | assert(bpi->extra); |
d62a17ae | 2397 | |
2398 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_MPLS_VPN, wcb->lockoffset); | |
2399 | ||
26a3ffd6 DS |
2400 | vnc_zlog_debug_verbose("%s: removing bpi %p at prefix %pRN", __func__, |
2401 | bpi, wcb->node); | |
d62a17ae | 2402 | |
2403 | /* | |
2404 | * Remove the route (doubly-linked) | |
2405 | */ | |
40381db7 DS |
2406 | if (CHECK_FLAG(bpi->flags, BGP_PATH_VALID) |
2407 | && VALID_INTERIOR_TYPE(bpi->type)) | |
d62a17ae | 2408 | RFAPI_MONITOR_EXTERIOR(wcb->node)->valid_interior_count--; |
2409 | ||
26a3ffd6 DS |
2410 | p = agg_node_get_prefix(wcb->node); |
2411 | afi = family2afi(p->family); | |
d62a17ae | 2412 | wcb->import_table->holddown_count[afi] -= 1; /* keep count consistent */ |
40381db7 DS |
2413 | rfapiItBiIndexDel(wcb->node, bpi); |
2414 | rfapiBgpInfoDetach(wcb->node, bpi); /* with removed bpi */ | |
d62a17ae | 2415 | |
2416 | vnc_import_bgp_exterior_del_route_interior(bgp, wcb->import_table, | |
40381db7 | 2417 | wcb->node, bpi); |
d62a17ae | 2418 | |
2419 | ||
2420 | /* | |
2421 | * If VNC is configured to send response remove messages, AND | |
2422 | * if the removed route had a UN address, do response removal | |
2423 | * processing. | |
2424 | */ | |
2425 | if (!(bgp->rfapi_cfg->flags | |
2426 | & BGP_VNC_CONFIG_RESPONSE_REMOVAL_DISABLE)) { | |
2427 | ||
2428 | int has_valid_duplicate = 0; | |
40381db7 | 2429 | struct bgp_path_info *bpii; |
d62a17ae | 2430 | |
2431 | /* | |
2432 | * First check if there are any OTHER routes at this node | |
2433 | * that have the same nexthop and a valid UN address. If | |
2434 | * there are (e.g., from other peers), then the route isn't | |
2435 | * really gone, so skip sending a response removal message. | |
2436 | */ | |
40381db7 DS |
2437 | for (bpii = wcb->node->info; bpii; bpii = bpii->next) { |
2438 | if (rfapiVpnBiSamePtUn(bpi, bpii)) { | |
d62a17ae | 2439 | has_valid_duplicate = 1; |
2440 | break; | |
2441 | } | |
2442 | } | |
2443 | ||
2444 | vnc_zlog_debug_verbose("%s: has_valid_duplicate=%d", __func__, | |
2445 | has_valid_duplicate); | |
2446 | ||
2447 | if (!has_valid_duplicate) { | |
2448 | rfapiRibPendingDeleteRoute(bgp, wcb->import_table, afi, | |
2449 | wcb->node); | |
2450 | } | |
2451 | } | |
2452 | ||
40381db7 | 2453 | rfapiMonitorEncapDelete(bpi); |
d62a17ae | 2454 | |
2455 | /* | |
2456 | * If there are no VPN monitors at this VPN Node A, | |
2457 | * we are done | |
2458 | */ | |
2459 | if (!RFAPI_MONITOR_VPN(wcb->node)) { | |
2460 | vnc_zlog_debug_verbose("%s: no VPN monitors at this node", | |
2461 | __func__); | |
2462 | goto done; | |
2463 | } | |
2464 | ||
2465 | /* | |
2466 | * rfapiMonitorMoveShorter only moves monitors if there are | |
2467 | * no remaining valid routes at the current node | |
2468 | */ | |
2469 | moved = rfapiMonitorMoveShorter(wcb->node, 1); | |
2470 | ||
2471 | if (moved) { | |
2472 | rfapiMonitorMovedUp(wcb->import_table, wcb->node, moved->node, | |
2473 | moved); | |
2474 | } | |
65efcfce LB |
2475 | |
2476 | done: | |
d62a17ae | 2477 | /* |
40381db7 | 2478 | * Free VPN bpi |
d62a17ae | 2479 | */ |
40381db7 | 2480 | rfapiBgpInfoFree(bpi); |
d62a17ae | 2481 | wcb->info = NULL; |
2482 | ||
2483 | /* | |
2484 | * If route count at this node has gone to 0, withdraw exported prefix | |
2485 | */ | |
2486 | if (!wcb->node->info) { | |
2487 | /* see if the struct rfapi_it_extra is empty and can be freed */ | |
2488 | rfapiMonitorExtraPrune(SAFI_MPLS_VPN, wcb->node); | |
2489 | vnc_direct_bgp_del_prefix(bgp, wcb->import_table, wcb->node); | |
2490 | vnc_zebra_del_prefix(bgp, wcb->import_table, wcb->node); | |
2491 | } else { | |
2492 | /* | |
2493 | * nexthop change event | |
2494 | * vnc_direct_bgp_add_prefix() will recompute the VN addr | |
2495 | * ecommunity | |
2496 | */ | |
2497 | vnc_direct_bgp_add_prefix(bgp, wcb->import_table, wcb->node); | |
2498 | } | |
2499 | ||
2500 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_MPLS_VPN, 1 + wcb->lockoffset); | |
fe08ba7e | 2501 | agg_unlock_node(wcb->node); /* decr ref count */ |
d62a17ae | 2502 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); |
65efcfce LB |
2503 | } |
2504 | ||
2505 | /* | |
2506 | * This works for multiprotocol extension, but not for plain ol' | |
2507 | * unicast IPv4 because that nexthop is stored in attr->nexthop | |
2508 | */ | |
d62a17ae | 2509 | void rfapiNexthop2Prefix(struct attr *attr, struct prefix *p) |
65efcfce | 2510 | { |
d62a17ae | 2511 | assert(p); |
2512 | assert(attr); | |
2513 | ||
2514 | memset(p, 0, sizeof(struct prefix)); | |
2515 | ||
2516 | switch (p->family = BGP_MP_NEXTHOP_FAMILY(attr->mp_nexthop_len)) { | |
2517 | case AF_INET: | |
2518 | p->u.prefix4 = attr->mp_nexthop_global_in; | |
30360041 | 2519 | p->prefixlen = IPV4_MAX_BITLEN; |
d62a17ae | 2520 | break; |
2521 | ||
2522 | case AF_INET6: | |
2523 | p->u.prefix6 = attr->mp_nexthop_global; | |
135e9bdb | 2524 | p->prefixlen = IPV6_MAX_BITLEN; |
d62a17ae | 2525 | break; |
2526 | ||
2527 | default: | |
2528 | vnc_zlog_debug_verbose("%s: Family is unknown = %d", __func__, | |
2529 | p->family); | |
2530 | } | |
65efcfce LB |
2531 | } |
2532 | ||
d62a17ae | 2533 | void rfapiUnicastNexthop2Prefix(afi_t afi, struct attr *attr, struct prefix *p) |
65efcfce | 2534 | { |
d62a17ae | 2535 | if (afi == AFI_IP) { |
2536 | p->family = AF_INET; | |
30360041 | 2537 | p->prefixlen = IPV4_MAX_BITLEN; |
d62a17ae | 2538 | p->u.prefix4 = attr->nexthop; |
2539 | } else { | |
2540 | rfapiNexthop2Prefix(attr, p); | |
2541 | } | |
65efcfce LB |
2542 | } |
2543 | ||
d62a17ae | 2544 | static int rfapiAttrNexthopAddrDifferent(struct prefix *p1, struct prefix *p2) |
65efcfce | 2545 | { |
d62a17ae | 2546 | if (!p1 || !p2) { |
2547 | vnc_zlog_debug_verbose("%s: p1 or p2 is NULL", __func__); | |
2548 | return 1; | |
2549 | } | |
2550 | ||
2551 | /* | |
2552 | * Are address families the same? | |
2553 | */ | |
2554 | if (p1->family != p2->family) { | |
2555 | return 1; | |
2556 | } | |
2557 | ||
2558 | switch (p1->family) { | |
2559 | case AF_INET: | |
2560 | if (IPV4_ADDR_SAME(&p1->u.prefix4, &p2->u.prefix4)) | |
2561 | return 0; | |
2562 | break; | |
2563 | ||
2564 | case AF_INET6: | |
2565 | if (IPV6_ADDR_SAME(&p1->u.prefix6, &p2->u.prefix6)) | |
2566 | return 0; | |
2567 | break; | |
2568 | ||
2569 | default: | |
2570 | assert(1); | |
2571 | } | |
2572 | ||
2573 | return 1; | |
65efcfce LB |
2574 | } |
2575 | ||
40381db7 DS |
2576 | static void rfapiCopyUnEncap2VPN(struct bgp_path_info *encap_bpi, |
2577 | struct bgp_path_info *vpn_bpi) | |
65efcfce | 2578 | { |
40381db7 DS |
2579 | if (!vpn_bpi || !vpn_bpi->extra) { |
2580 | zlog_warn("%s: no vpn bpi attr/extra, can't copy UN address", | |
d62a17ae | 2581 | __func__); |
2582 | return; | |
2583 | } | |
2584 | ||
40381db7 | 2585 | switch (BGP_MP_NEXTHOP_FAMILY(encap_bpi->attr->mp_nexthop_len)) { |
d62a17ae | 2586 | case AF_INET: |
2587 | ||
2588 | /* | |
2589 | * instrumentation to debug segfault of 091127 | |
2590 | */ | |
40381db7 | 2591 | vnc_zlog_debug_verbose("%s: vpn_bpi=%p", __func__, vpn_bpi); |
e6b457ac DA |
2592 | vnc_zlog_debug_verbose("%s: vpn_bpi->extra=%p", __func__, |
2593 | vpn_bpi->extra); | |
d62a17ae | 2594 | |
40381db7 DS |
2595 | vpn_bpi->extra->vnc.import.un_family = AF_INET; |
2596 | vpn_bpi->extra->vnc.import.un.addr4 = | |
2597 | encap_bpi->attr->mp_nexthop_global_in; | |
d62a17ae | 2598 | break; |
2599 | ||
2600 | case AF_INET6: | |
40381db7 DS |
2601 | vpn_bpi->extra->vnc.import.un_family = AF_INET6; |
2602 | vpn_bpi->extra->vnc.import.un.addr6 = | |
2603 | encap_bpi->attr->mp_nexthop_global; | |
d62a17ae | 2604 | break; |
2605 | ||
2606 | default: | |
2607 | zlog_warn("%s: invalid encap nexthop length: %d", __func__, | |
40381db7 | 2608 | encap_bpi->attr->mp_nexthop_len); |
c7ca5ccf | 2609 | vpn_bpi->extra->vnc.import.un_family = AF_UNSPEC; |
d62a17ae | 2610 | break; |
2611 | } | |
65efcfce LB |
2612 | } |
2613 | ||
2614 | /* | |
2615 | * returns 0 on success, nonzero on error | |
2616 | */ | |
40381db7 DS |
2617 | static int |
2618 | rfapiWithdrawEncapUpdateCachedUn(struct rfapi_import_table *import_table, | |
2619 | struct bgp_path_info *encap_bpi, | |
2620 | struct agg_node *vpn_rn, | |
2621 | struct bgp_path_info *vpn_bpi) | |
65efcfce | 2622 | { |
40381db7 | 2623 | if (!encap_bpi) { |
d62a17ae | 2624 | |
2625 | /* | |
2626 | * clear cached UN address | |
2627 | */ | |
40381db7 | 2628 | if (!vpn_bpi || !vpn_bpi->extra) { |
d62a17ae | 2629 | zlog_warn( |
40381db7 | 2630 | "%s: missing VPN bpi/extra, can't clear UN addr", |
d62a17ae | 2631 | __func__); |
2632 | return 1; | |
2633 | } | |
c7ca5ccf | 2634 | vpn_bpi->extra->vnc.import.un_family = AF_UNSPEC; |
40381db7 DS |
2635 | memset(&vpn_bpi->extra->vnc.import.un, 0, |
2636 | sizeof(vpn_bpi->extra->vnc.import.un)); | |
2637 | if (CHECK_FLAG(vpn_bpi->flags, BGP_PATH_VALID)) { | |
2638 | if (rfapiGetVncTunnelUnAddr(vpn_bpi->attr, NULL)) { | |
2639 | UNSET_FLAG(vpn_bpi->flags, BGP_PATH_VALID); | |
2640 | if (VALID_INTERIOR_TYPE(vpn_bpi->type)) | |
d62a17ae | 2641 | RFAPI_MONITOR_EXTERIOR(vpn_rn) |
2642 | ->valid_interior_count--; | |
2643 | /* signal interior route withdrawal to | |
2644 | * import-exterior */ | |
2645 | vnc_import_bgp_exterior_del_route_interior( | |
2646 | bgp_get_default(), import_table, vpn_rn, | |
40381db7 | 2647 | vpn_bpi); |
d62a17ae | 2648 | } |
2649 | } | |
2650 | ||
2651 | } else { | |
40381db7 DS |
2652 | if (!vpn_bpi) { |
2653 | zlog_warn("%s: missing VPN bpi, can't clear UN addr", | |
d62a17ae | 2654 | __func__); |
2655 | return 1; | |
2656 | } | |
40381db7 DS |
2657 | rfapiCopyUnEncap2VPN(encap_bpi, vpn_bpi); |
2658 | if (!CHECK_FLAG(vpn_bpi->flags, BGP_PATH_VALID)) { | |
2659 | SET_FLAG(vpn_bpi->flags, BGP_PATH_VALID); | |
2660 | if (VALID_INTERIOR_TYPE(vpn_bpi->type)) | |
d62a17ae | 2661 | RFAPI_MONITOR_EXTERIOR(vpn_rn) |
2662 | ->valid_interior_count++; | |
2663 | /* signal interior route withdrawal to import-exterior | |
2664 | */ | |
2665 | vnc_import_bgp_exterior_add_route_interior( | |
2666 | bgp_get_default(), import_table, vpn_rn, | |
40381db7 | 2667 | vpn_bpi); |
d62a17ae | 2668 | } |
2669 | } | |
2670 | return 0; | |
65efcfce LB |
2671 | } |
2672 | ||
cc9f21da | 2673 | static void rfapiWithdrawTimerEncap(struct thread *t) |
65efcfce | 2674 | { |
d62a17ae | 2675 | struct rfapi_withdraw *wcb = t->arg; |
40381db7 | 2676 | struct bgp_path_info *bpi = wcb->info; |
d62a17ae | 2677 | int was_first_route = 0; |
2678 | struct rfapi_monitor_encap *em; | |
2679 | struct skiplist *vpn_node_sl = skiplist_new(0, NULL, NULL); | |
2680 | ||
2681 | assert(wcb->node); | |
40381db7 | 2682 | assert(bpi); |
d62a17ae | 2683 | assert(wcb->import_table); |
2684 | ||
2685 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_ENCAP, 0); | |
2686 | ||
40381db7 | 2687 | if (wcb->node->info == bpi) |
d62a17ae | 2688 | was_first_route = 1; |
2689 | ||
2690 | /* | |
40381db7 | 2691 | * Remove the route/bpi and free it |
d62a17ae | 2692 | */ |
40381db7 DS |
2693 | rfapiBgpInfoDetach(wcb->node, bpi); |
2694 | rfapiBgpInfoFree(bpi); | |
d62a17ae | 2695 | |
2696 | if (!was_first_route) | |
2697 | goto done; | |
2698 | ||
2699 | for (em = RFAPI_MONITOR_ENCAP(wcb->node); em; em = em->next) { | |
2700 | ||
2701 | /* | |
40381db7 DS |
2702 | * Update monitoring VPN BPIs with new encap info at the |
2703 | * head of the encap bpi chain (which could be NULL after | |
2704 | * removing the expiring bpi above) | |
d62a17ae | 2705 | */ |
2706 | if (rfapiWithdrawEncapUpdateCachedUn(wcb->import_table, | |
2707 | wcb->node->info, em->node, | |
40381db7 | 2708 | em->bpi)) |
d62a17ae | 2709 | continue; |
2710 | ||
2711 | /* | |
2712 | * Build a list of unique VPN nodes referenced by these | |
2713 | * monitors. | |
2714 | * Use a skiplist for speed. | |
2715 | */ | |
2716 | skiplist_insert(vpn_node_sl, em->node, em->node); | |
2717 | } | |
2718 | ||
2719 | ||
2720 | /* | |
2721 | * for each VPN node referenced in the ENCAP monitors: | |
2722 | */ | |
fe08ba7e | 2723 | struct agg_node *rn; |
d62a17ae | 2724 | while (!skiplist_first(vpn_node_sl, (void **)&rn, NULL)) { |
2725 | if (!wcb->node->info) { | |
2726 | struct rfapi_monitor_vpn *moved; | |
2727 | ||
2728 | moved = rfapiMonitorMoveShorter(rn, 0); | |
2729 | if (moved) { | |
2730 | // rfapiDoRouteCallback(wcb->import_table, | |
2731 | // moved->node, moved); | |
2732 | rfapiMonitorMovedUp(wcb->import_table, rn, | |
2733 | moved->node, moved); | |
2734 | } | |
2735 | } else { | |
2736 | // rfapiDoRouteCallback(wcb->import_table, rn, NULL); | |
2737 | rfapiMonitorItNodeChanged(wcb->import_table, rn, NULL); | |
2738 | } | |
2739 | skiplist_delete_first(vpn_node_sl); | |
2740 | } | |
65efcfce LB |
2741 | |
2742 | done: | |
d62a17ae | 2743 | RFAPI_CHECK_REFCOUNT(wcb->node, SAFI_ENCAP, 1); |
fe08ba7e | 2744 | agg_unlock_node(wcb->node); /* decr ref count */ |
d62a17ae | 2745 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); |
2746 | skiplist_free(vpn_node_sl); | |
65efcfce LB |
2747 | } |
2748 | ||
2749 | ||
2750 | /* | |
2751 | * Works for both VPN and ENCAP routes; timer_service_func is different | |
2752 | * in each case | |
2753 | */ | |
2754 | static void | |
d62a17ae | 2755 | rfapiBiStartWithdrawTimer(struct rfapi_import_table *import_table, |
40381db7 | 2756 | struct agg_node *rn, struct bgp_path_info *bpi, |
4b7e6066 | 2757 | afi_t afi, safi_t safi, |
cc9f21da | 2758 | void (*timer_service_func)(struct thread *)) |
65efcfce | 2759 | { |
d62a17ae | 2760 | uint32_t lifetime; |
2761 | struct rfapi_withdraw *wcb; | |
2762 | ||
40381db7 | 2763 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
a8fd6fde QY |
2764 | /* |
2765 | * Already on the path to being withdrawn, | |
2766 | * should already have a timer set up to | |
2767 | * delete it. | |
2768 | */ | |
2769 | vnc_zlog_debug_verbose( | |
2770 | "%s: already being withdrawn, do nothing", __func__); | |
2771 | return; | |
2772 | } | |
d62a17ae | 2773 | |
40381db7 | 2774 | rfapiGetVncLifetime(bpi->attr, &lifetime); |
d62a17ae | 2775 | vnc_zlog_debug_verbose("%s: VNC lifetime is %u", __func__, lifetime); |
2776 | ||
2777 | /* | |
2778 | * withdrawn routes get to hang around for a while | |
2779 | */ | |
40381db7 | 2780 | SET_FLAG(bpi->flags, BGP_PATH_REMOVED); |
d62a17ae | 2781 | |
2782 | /* set timer to remove the route later */ | |
2783 | lifetime = rfapiGetHolddownFromLifetime(lifetime); | |
2784 | vnc_zlog_debug_verbose("%s: using timeout %u", __func__, lifetime); | |
2785 | ||
2786 | /* | |
2787 | * Stash import_table, node, and info for use by timer | |
2788 | * service routine, which is supposed to free the wcb. | |
2789 | */ | |
2790 | wcb = XCALLOC(MTYPE_RFAPI_WITHDRAW, sizeof(struct rfapi_withdraw)); | |
d62a17ae | 2791 | wcb->node = rn; |
40381db7 | 2792 | wcb->info = bpi; |
d62a17ae | 2793 | wcb->import_table = import_table; |
40381db7 | 2794 | bgp_attr_intern(bpi->attr); |
d62a17ae | 2795 | |
2796 | if (VNC_DEBUG(VERBOSE)) { | |
2797 | vnc_zlog_debug_verbose( | |
40381db7 | 2798 | "%s: wcb values: node=%p, info=%p, import_table=%p (bpi follows)", |
d62a17ae | 2799 | __func__, wcb->node, wcb->info, wcb->import_table); |
40381db7 | 2800 | rfapiPrintBi(NULL, bpi); |
d62a17ae | 2801 | } |
2802 | ||
2803 | ||
40381db7 | 2804 | assert(bpi->extra); |
d62a17ae | 2805 | if (lifetime > UINT32_MAX / 1001) { |
2806 | /* sub-optimal case, but will probably never happen */ | |
40381db7 | 2807 | bpi->extra->vnc.import.timer = NULL; |
d62a17ae | 2808 | thread_add_timer(bm->master, timer_service_func, wcb, lifetime, |
40381db7 | 2809 | &bpi->extra->vnc.import.timer); |
d62a17ae | 2810 | } else { |
2811 | static uint32_t jitter; | |
2812 | uint32_t lifetime_msec; | |
2813 | ||
2814 | /* | |
2815 | * the goal here is to spread out the timers so they are | |
2816 | * sortable in the skip list | |
2817 | */ | |
2818 | if (++jitter >= 1000) | |
2819 | jitter = 0; | |
2820 | ||
2821 | lifetime_msec = (lifetime * 1000) + jitter; | |
2822 | ||
40381db7 | 2823 | bpi->extra->vnc.import.timer = NULL; |
d62a17ae | 2824 | thread_add_timer_msec(bm->master, timer_service_func, wcb, |
2825 | lifetime_msec, | |
40381db7 | 2826 | &bpi->extra->vnc.import.timer); |
d62a17ae | 2827 | } |
2828 | ||
1defdda8 | 2829 | /* re-sort route list (BGP_PATH_REMOVED routes are last) */ |
4b7e6066 | 2830 | if (((struct bgp_path_info *)rn->info)->next) { |
40381db7 DS |
2831 | rfapiBgpInfoDetach(rn, bpi); |
2832 | rfapiBgpInfoAttachSorted(rn, bpi, afi, safi); | |
d62a17ae | 2833 | } |
65efcfce LB |
2834 | } |
2835 | ||
2836 | ||
5a1ae2c2 DS |
2837 | typedef void(rfapi_bi_filtered_import_f)(struct rfapi_import_table *table, |
2838 | int action, struct peer *peer, | |
2839 | void *rfd, const struct prefix *prefix, | |
2840 | const struct prefix *aux_prefix, | |
2841 | afi_t afi, struct prefix_rd *prd, | |
2842 | struct attr *attr, uint8_t type, | |
2843 | uint8_t sub_type, uint32_t *label); | |
65efcfce LB |
2844 | |
2845 | ||
d62a17ae | 2846 | static void rfapiExpireEncapNow(struct rfapi_import_table *it, |
40381db7 | 2847 | struct agg_node *rn, struct bgp_path_info *bpi) |
65efcfce | 2848 | { |
d62a17ae | 2849 | struct rfapi_withdraw *wcb; |
2850 | struct thread t; | |
2851 | ||
2852 | /* | |
2853 | * pretend we're an expiring timer | |
2854 | */ | |
2855 | wcb = XCALLOC(MTYPE_RFAPI_WITHDRAW, sizeof(struct rfapi_withdraw)); | |
40381db7 | 2856 | wcb->info = bpi; |
d62a17ae | 2857 | wcb->node = rn; |
2858 | wcb->import_table = it; | |
2859 | memset(&t, 0, sizeof(t)); | |
2860 | t.arg = wcb; | |
2861 | rfapiWithdrawTimerEncap(&t); /* frees wcb */ | |
65efcfce LB |
2862 | } |
2863 | ||
d62a17ae | 2864 | static int rfapiGetNexthop(struct attr *attr, struct prefix *prefix) |
65efcfce | 2865 | { |
d62a17ae | 2866 | switch (BGP_MP_NEXTHOP_FAMILY(attr->mp_nexthop_len)) { |
2867 | case AF_INET: | |
2868 | prefix->family = AF_INET; | |
30360041 | 2869 | prefix->prefixlen = IPV4_MAX_BITLEN; |
d62a17ae | 2870 | prefix->u.prefix4 = attr->mp_nexthop_global_in; |
2871 | break; | |
2872 | case AF_INET6: | |
2873 | prefix->family = AF_INET6; | |
135e9bdb | 2874 | prefix->prefixlen = IPV6_MAX_BITLEN; |
d62a17ae | 2875 | prefix->u.prefix6 = attr->mp_nexthop_global; |
2876 | break; | |
2877 | default: | |
2878 | vnc_zlog_debug_verbose("%s: unknown attr->mp_nexthop_len %d", | |
2879 | __func__, attr->mp_nexthop_len); | |
2880 | return EINVAL; | |
2881 | } | |
2882 | return 0; | |
65efcfce LB |
2883 | } |
2884 | ||
d62a17ae | 2885 | /* |
9b6d8fcf | 2886 | * import a bgp_path_info if its route target list intersects with the |
65efcfce LB |
2887 | * import table's route target list |
2888 | */ | |
d62a17ae | 2889 | static void rfapiBgpInfoFilteredImportEncap( |
2890 | struct rfapi_import_table *import_table, int action, struct peer *peer, | |
2891 | void *rfd, /* set for looped back routes */ | |
5a1ae2c2 DS |
2892 | const struct prefix *p, |
2893 | const struct prefix *aux_prefix, /* Unused for encap routes */ | |
d62a17ae | 2894 | afi_t afi, struct prefix_rd *prd, |
9b6d8fcf | 2895 | struct attr *attr, /* part of bgp_path_info */ |
5a1ae2c2 | 2896 | uint8_t type, /* part of bgp_path_info */ |
9b6d8fcf DS |
2897 | uint8_t sub_type, /* part of bgp_path_info */ |
2898 | uint32_t *label) /* part of bgp_path_info */ | |
65efcfce | 2899 | { |
fe08ba7e DS |
2900 | struct agg_table *rt = NULL; |
2901 | struct agg_node *rn; | |
4b7e6066 | 2902 | struct bgp_path_info *info_new; |
40381db7 | 2903 | struct bgp_path_info *bpi; |
4b7e6066 | 2904 | struct bgp_path_info *next; |
d62a17ae | 2905 | char buf[BUFSIZ]; |
2906 | ||
40381db7 DS |
2907 | struct prefix p_firstbpi_old; |
2908 | struct prefix p_firstbpi_new; | |
d62a17ae | 2909 | int replacing = 0; |
2910 | const char *action_str = NULL; | |
2911 | struct prefix un_prefix; | |
2912 | ||
2913 | struct bgp *bgp; | |
2914 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
2915 | ||
2916 | switch (action) { | |
2917 | case FIF_ACTION_UPDATE: | |
2918 | action_str = "update"; | |
2919 | break; | |
2920 | case FIF_ACTION_WITHDRAW: | |
2921 | action_str = "withdraw"; | |
2922 | break; | |
2923 | case FIF_ACTION_KILL: | |
2924 | action_str = "kill"; | |
2925 | break; | |
2926 | default: | |
2927 | assert(0); | |
2928 | break; | |
2929 | } | |
2930 | ||
2931 | vnc_zlog_debug_verbose( | |
2932 | "%s: entry: %s: prefix %s/%d", __func__, action_str, | |
2933 | inet_ntop(p->family, &p->u.prefix, buf, BUFSIZ), p->prefixlen); | |
2934 | ||
40381db7 DS |
2935 | memset(&p_firstbpi_old, 0, sizeof(p_firstbpi_old)); |
2936 | memset(&p_firstbpi_new, 0, sizeof(p_firstbpi_new)); | |
d62a17ae | 2937 | |
2938 | if (action == FIF_ACTION_UPDATE) { | |
2939 | /* | |
2940 | * Compare rt lists. If no intersection, don't import this route | |
2941 | * On a withdraw, peer and RD are sufficient to determine if | |
2942 | * we should act. | |
2943 | */ | |
b53e67a3 | 2944 | if (!attr || !bgp_attr_get_ecommunity(attr)) { |
d62a17ae | 2945 | |
2946 | vnc_zlog_debug_verbose( | |
2947 | "%s: attr, extra, or ecommunity missing, not importing", | |
2948 | __func__); | |
2949 | return; | |
2950 | } | |
1e20238a | 2951 | #ifdef RFAPI_REQUIRE_ENCAP_BEEC |
b53e67a3 DA |
2952 | if (!rfapiEcommunitiesMatchBeec( |
2953 | bgp_attr_get_ecommunity(attr))) { | |
d62a17ae | 2954 | vnc_zlog_debug_verbose( |
2955 | "%s: it=%p: no match for BGP Encapsulation ecommunity", | |
2956 | __func__, import_table); | |
2957 | return; | |
2958 | } | |
65efcfce | 2959 | #endif |
b53e67a3 DA |
2960 | if (!rfapiEcommunitiesIntersect( |
2961 | import_table->rt_import_list, | |
2962 | bgp_attr_get_ecommunity(attr))) { | |
d62a17ae | 2963 | |
2964 | vnc_zlog_debug_verbose( | |
2965 | "%s: it=%p: no ecommunity intersection", | |
2966 | __func__, import_table); | |
2967 | return; | |
2968 | } | |
2969 | ||
2970 | /* | |
2971 | * Updates must also have a nexthop address | |
2972 | */ | |
2973 | memset(&un_prefix, 0, | |
2974 | sizeof(un_prefix)); /* keep valgrind happy */ | |
2975 | if (rfapiGetNexthop(attr, &un_prefix)) { | |
2976 | vnc_zlog_debug_verbose("%s: missing nexthop address", | |
2977 | __func__); | |
2978 | return; | |
2979 | } | |
2980 | } | |
2981 | ||
2982 | /* | |
2983 | * Figure out which radix tree the route would go into | |
2984 | */ | |
2985 | switch (afi) { | |
2986 | case AFI_IP: | |
2987 | case AFI_IP6: | |
2988 | rt = import_table->imported_encap[afi]; | |
2989 | break; | |
2990 | ||
2991 | default: | |
450971aa | 2992 | flog_err(EC_LIB_DEVELOPMENT, "%s: bad afi %d", __func__, afi); |
d62a17ae | 2993 | return; |
2994 | } | |
2995 | ||
2996 | /* | |
fe08ba7e | 2997 | * agg_node_lookup returns a node only if there is at least |
d62a17ae | 2998 | * one route attached. |
2999 | */ | |
fe08ba7e | 3000 | rn = agg_node_lookup(rt, p); |
65efcfce | 3001 | |
1e20238a | 3002 | #ifdef DEBUG_ENCAP_MONITOR |
d62a17ae | 3003 | vnc_zlog_debug_verbose("%s: initial encap lookup(it=%p) rn=%p", |
3004 | __func__, import_table, rn); | |
65efcfce LB |
3005 | #endif |
3006 | ||
d62a17ae | 3007 | if (rn) { |
3008 | ||
3009 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, 1); | |
fe08ba7e | 3010 | agg_unlock_node(rn); /* undo lock in agg_node_lookup */ |
d62a17ae | 3011 | |
3012 | ||
3013 | /* | |
40381db7 | 3014 | * capture nexthop of first bpi |
d62a17ae | 3015 | */ |
3016 | if (rn->info) { | |
3017 | rfapiNexthop2Prefix( | |
4b7e6066 | 3018 | ((struct bgp_path_info *)(rn->info))->attr, |
40381db7 | 3019 | &p_firstbpi_old); |
d62a17ae | 3020 | } |
3021 | ||
40381db7 | 3022 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
d62a17ae | 3023 | |
3024 | /* | |
9b6d8fcf | 3025 | * Does this bgp_path_info refer to the same route |
d62a17ae | 3026 | * as we are trying to add? |
3027 | */ | |
40381db7 DS |
3028 | vnc_zlog_debug_verbose("%s: comparing BPI %p", __func__, |
3029 | bpi); | |
d62a17ae | 3030 | |
3031 | ||
3032 | /* | |
3033 | * Compare RDs | |
3034 | * | |
40381db7 DS |
3035 | * RD of import table bpi is in |
3036 | * bpi->extra->vnc.import.rd RD of info_orig is in prd | |
d62a17ae | 3037 | */ |
40381db7 DS |
3038 | if (!bpi->extra) { |
3039 | vnc_zlog_debug_verbose("%s: no bpi->extra", | |
d62a17ae | 3040 | __func__); |
3041 | continue; | |
3042 | } | |
3043 | if (prefix_cmp( | |
40381db7 | 3044 | (struct prefix *)&bpi->extra->vnc.import.rd, |
d62a17ae | 3045 | (struct prefix *)prd)) { |
3046 | ||
3047 | vnc_zlog_debug_verbose("%s: prd does not match", | |
3048 | __func__); | |
3049 | continue; | |
3050 | } | |
3051 | ||
3052 | /* | |
3053 | * Compare peers | |
3054 | */ | |
40381db7 | 3055 | if (bpi->peer != peer) { |
d62a17ae | 3056 | vnc_zlog_debug_verbose( |
3057 | "%s: peer does not match", __func__); | |
3058 | continue; | |
3059 | } | |
3060 | ||
40381db7 | 3061 | vnc_zlog_debug_verbose("%s: found matching bpi", |
d62a17ae | 3062 | __func__); |
3063 | ||
40381db7 | 3064 | /* Same route. Delete this bpi, replace with new one */ |
d62a17ae | 3065 | |
3066 | if (action == FIF_ACTION_WITHDRAW) { | |
3067 | ||
3068 | vnc_zlog_debug_verbose( | |
26a3ffd6 DS |
3069 | "%s: withdrawing at prefix %pRN", |
3070 | __func__, rn); | |
d62a17ae | 3071 | |
3072 | rfapiBiStartWithdrawTimer( | |
40381db7 | 3073 | import_table, rn, bpi, afi, SAFI_ENCAP, |
d62a17ae | 3074 | rfapiWithdrawTimerEncap); |
3075 | ||
3076 | } else { | |
3077 | vnc_zlog_debug_verbose( | |
26a3ffd6 | 3078 | "%s: %s at prefix %pRN", __func__, |
d62a17ae | 3079 | ((action == FIF_ACTION_KILL) |
3080 | ? "killing" | |
3081 | : "replacing"), | |
26a3ffd6 | 3082 | rn); |
d62a17ae | 3083 | |
3084 | /* | |
3085 | * If this route is waiting to be deleted | |
3086 | * because of | |
3087 | * a previous withdraw, we must cancel its | |
3088 | * timer. | |
3089 | */ | |
40381db7 DS |
3090 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
3091 | && bpi->extra->vnc.import.timer) { | |
d62a17ae | 3092 | |
b3d6bc6e MS |
3093 | struct thread **t = |
3094 | &(bpi->extra->vnc.import.timer); | |
3095 | struct rfapi_withdraw *wcb = (*t)->arg; | |
d62a17ae | 3096 | |
3097 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
3098 | thread_cancel(t); | |
3099 | } | |
3100 | ||
3101 | if (action == FIF_ACTION_UPDATE) { | |
40381db7 DS |
3102 | rfapiBgpInfoDetach(rn, bpi); |
3103 | rfapiBgpInfoFree(bpi); | |
d62a17ae | 3104 | replacing = 1; |
3105 | } else { | |
3106 | /* | |
3107 | * Kill: do export stuff when removing | |
40381db7 | 3108 | * bpi |
d62a17ae | 3109 | */ |
3110 | struct rfapi_withdraw *wcb; | |
3111 | struct thread t; | |
3112 | ||
3113 | /* | |
3114 | * pretend we're an expiring timer | |
3115 | */ | |
3116 | wcb = XCALLOC( | |
3117 | MTYPE_RFAPI_WITHDRAW, | |
3118 | sizeof(struct rfapi_withdraw)); | |
40381db7 | 3119 | wcb->info = bpi; |
d62a17ae | 3120 | wcb->node = rn; |
3121 | wcb->import_table = import_table; | |
3122 | memset(&t, 0, sizeof(t)); | |
3123 | t.arg = wcb; | |
3124 | rfapiWithdrawTimerEncap( | |
3125 | &t); /* frees wcb */ | |
3126 | } | |
3127 | } | |
3128 | ||
3129 | break; | |
3130 | } | |
3131 | } | |
3132 | ||
3133 | if (rn) | |
3134 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, replacing ? 1 : 0); | |
3135 | ||
3136 | if (action == FIF_ACTION_WITHDRAW || action == FIF_ACTION_KILL) | |
3137 | return; | |
3138 | ||
3139 | info_new = | |
3140 | rfapiBgpInfoCreate(attr, peer, rfd, prd, type, sub_type, NULL); | |
3141 | ||
3142 | if (rn) { | |
3143 | if (!replacing) | |
40381db7 | 3144 | agg_lock_node(rn); /* incr ref count for new BPI */ |
d62a17ae | 3145 | } else { |
fe08ba7e | 3146 | rn = agg_node_get(rt, p); |
d62a17ae | 3147 | } |
3148 | ||
26a3ffd6 DS |
3149 | vnc_zlog_debug_verbose("%s: (afi=%d, rn=%p) inserting at prefix %pRN", |
3150 | __func__, afi, rn, rn); | |
d62a17ae | 3151 | |
3152 | rfapiBgpInfoAttachSorted(rn, info_new, afi, SAFI_ENCAP); | |
3153 | ||
3154 | /* | |
3155 | * Delete holddown routes from same NVE. See details in | |
3156 | * rfapiBgpInfoFilteredImportVPN() | |
3157 | */ | |
40381db7 | 3158 | for (bpi = info_new->next; bpi; bpi = next) { |
d62a17ae | 3159 | |
3160 | struct prefix pfx_un; | |
3161 | int un_match = 0; | |
3162 | ||
40381db7 DS |
3163 | next = bpi->next; |
3164 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) | |
d62a17ae | 3165 | continue; |
3166 | ||
3167 | /* | |
3168 | * We already match the VN address (it is the prefix | |
3169 | * of the route node) | |
3170 | */ | |
3171 | ||
40381db7 | 3172 | if (!rfapiGetNexthop(bpi->attr, &pfx_un) |
d62a17ae | 3173 | && prefix_same(&pfx_un, &un_prefix)) { |
3174 | ||
3175 | un_match = 1; | |
3176 | } | |
3177 | ||
3178 | if (!un_match) | |
3179 | continue; | |
3180 | ||
3181 | vnc_zlog_debug_verbose( | |
40381db7 | 3182 | "%s: removing holddown bpi matching NVE of new route", |
d62a17ae | 3183 | __func__); |
40381db7 | 3184 | if (bpi->extra->vnc.import.timer) { |
b3d6bc6e MS |
3185 | struct thread **t = |
3186 | &(bpi->extra->vnc.import.timer); | |
3187 | struct rfapi_withdraw *wcb = (*t)->arg; | |
d62a17ae | 3188 | |
3189 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
3190 | thread_cancel(t); | |
3191 | } | |
40381db7 | 3192 | rfapiExpireEncapNow(import_table, rn, bpi); |
d62a17ae | 3193 | } |
3194 | ||
4b7e6066 | 3195 | rfapiNexthop2Prefix(((struct bgp_path_info *)(rn->info))->attr, |
40381db7 | 3196 | &p_firstbpi_new); |
d62a17ae | 3197 | |
3198 | /* | |
3199 | * If the nexthop address of the selected Encap route (i.e., | |
3200 | * the UN address) has changed, then we must update the VPN | |
3201 | * routes that refer to this Encap route and possibly force | |
3202 | * rfapi callbacks. | |
3203 | */ | |
40381db7 | 3204 | if (rfapiAttrNexthopAddrDifferent(&p_firstbpi_old, &p_firstbpi_new)) { |
d62a17ae | 3205 | |
3206 | struct rfapi_monitor_encap *m; | |
3207 | struct rfapi_monitor_encap *mnext; | |
3208 | ||
fe08ba7e | 3209 | struct agg_node *referenced_vpn_prefix; |
d62a17ae | 3210 | |
3211 | /* | |
3212 | * Optimized approach: build radix tree on the fly to | |
3213 | * hold list of VPN nodes referenced by the ENCAP monitors | |
3214 | * | |
3215 | * The nodes in this table correspond to prefixes of VPN routes. | |
3216 | * The "info" pointer of the node points to a chain of | |
3217 | * struct rfapi_monitor_encap, each of which refers to a | |
3218 | * specific VPN node. | |
3219 | */ | |
fe08ba7e | 3220 | struct agg_table *referenced_vpn_table; |
d62a17ae | 3221 | |
fe08ba7e | 3222 | referenced_vpn_table = agg_table_init(); |
d62a17ae | 3223 | |
3224 | /* | |
3225 | * iterate over the set of monitors at this ENCAP node. | |
3226 | */ | |
1e20238a | 3227 | #ifdef DEBUG_ENCAP_MONITOR |
d62a17ae | 3228 | vnc_zlog_debug_verbose("%s: examining monitors at rn=%p", |
3229 | __func__, rn); | |
65efcfce | 3230 | #endif |
d62a17ae | 3231 | for (m = RFAPI_MONITOR_ENCAP(rn); m; m = m->next) { |
26a3ffd6 | 3232 | const struct prefix *p; |
d62a17ae | 3233 | |
3234 | /* | |
40381db7 | 3235 | * For each referenced bpi/route, copy the ENCAP route's |
d62a17ae | 3236 | * nexthop to the VPN route's cached UN address field |
3237 | * and set | |
3238 | * the address family of the cached UN address field. | |
3239 | */ | |
40381db7 DS |
3240 | rfapiCopyUnEncap2VPN(info_new, m->bpi); |
3241 | if (!CHECK_FLAG(m->bpi->flags, BGP_PATH_VALID)) { | |
3242 | SET_FLAG(m->bpi->flags, BGP_PATH_VALID); | |
3243 | if (VALID_INTERIOR_TYPE(m->bpi->type)) | |
d62a17ae | 3244 | RFAPI_MONITOR_EXTERIOR(m->node) |
3245 | ->valid_interior_count++; | |
3246 | vnc_import_bgp_exterior_add_route_interior( | |
40381db7 | 3247 | bgp, import_table, m->node, m->bpi); |
d62a17ae | 3248 | } |
3249 | ||
3250 | /* | |
3251 | * Build a list of unique VPN nodes referenced by these | |
3252 | * monitors | |
3253 | * | |
3254 | * There could be more than one VPN node here with a | |
3255 | * given | |
3256 | * prefix. Those are currently in an unsorted linear | |
3257 | * list | |
3258 | * per prefix. | |
3259 | */ | |
26a3ffd6 | 3260 | p = agg_node_get_prefix(m->node); |
fe08ba7e | 3261 | referenced_vpn_prefix = |
26a3ffd6 | 3262 | agg_node_get(referenced_vpn_table, p); |
d62a17ae | 3263 | assert(referenced_vpn_prefix); |
3264 | for (mnext = referenced_vpn_prefix->info; mnext; | |
3265 | mnext = mnext->next) { | |
3266 | ||
3267 | if (mnext->node == m->node) | |
3268 | break; | |
3269 | } | |
3270 | ||
3271 | if (mnext) { | |
3272 | /* | |
3273 | * already have an entry for this VPN node | |
3274 | */ | |
fe08ba7e | 3275 | agg_unlock_node(referenced_vpn_prefix); |
d62a17ae | 3276 | } else { |
3277 | mnext = XCALLOC( | |
3278 | MTYPE_RFAPI_MONITOR_ENCAP, | |
3279 | sizeof(struct rfapi_monitor_encap)); | |
d62a17ae | 3280 | mnext->node = m->node; |
3281 | mnext->next = referenced_vpn_prefix->info; | |
3282 | referenced_vpn_prefix->info = mnext; | |
3283 | } | |
3284 | } | |
3285 | ||
3286 | /* | |
3287 | * for each VPN node referenced in the ENCAP monitors: | |
3288 | */ | |
fe08ba7e DS |
3289 | for (referenced_vpn_prefix = |
3290 | agg_route_top(referenced_vpn_table); | |
3291 | referenced_vpn_prefix; | |
3292 | referenced_vpn_prefix = | |
3293 | agg_route_next(referenced_vpn_prefix)) { | |
d62a17ae | 3294 | |
3295 | while ((m = referenced_vpn_prefix->info)) { | |
3296 | ||
fe08ba7e | 3297 | struct agg_node *n; |
d62a17ae | 3298 | |
3299 | rfapiMonitorMoveLonger(m->node); | |
fe08ba7e | 3300 | for (n = m->node; n; n = agg_node_parent(n)) { |
d62a17ae | 3301 | // rfapiDoRouteCallback(import_table, n, |
3302 | // NULL); | |
3303 | } | |
3304 | rfapiMonitorItNodeChanged(import_table, m->node, | |
3305 | NULL); | |
3306 | ||
3307 | referenced_vpn_prefix->info = m->next; | |
fe08ba7e | 3308 | agg_unlock_node(referenced_vpn_prefix); |
d62a17ae | 3309 | XFREE(MTYPE_RFAPI_MONITOR_ENCAP, m); |
3310 | } | |
3311 | } | |
fe08ba7e | 3312 | agg_table_finish(referenced_vpn_table); |
d62a17ae | 3313 | } |
3314 | ||
3315 | RFAPI_CHECK_REFCOUNT(rn, SAFI_ENCAP, 0); | |
65efcfce LB |
3316 | } |
3317 | ||
d62a17ae | 3318 | static void rfapiExpireVpnNow(struct rfapi_import_table *it, |
40381db7 | 3319 | struct agg_node *rn, struct bgp_path_info *bpi, |
d62a17ae | 3320 | int lockoffset) |
65efcfce | 3321 | { |
d62a17ae | 3322 | struct rfapi_withdraw *wcb; |
3323 | struct thread t; | |
3324 | ||
3325 | /* | |
3326 | * pretend we're an expiring timer | |
3327 | */ | |
3328 | wcb = XCALLOC(MTYPE_RFAPI_WITHDRAW, sizeof(struct rfapi_withdraw)); | |
40381db7 | 3329 | wcb->info = bpi; |
d62a17ae | 3330 | wcb->node = rn; |
3331 | wcb->import_table = it; | |
3332 | wcb->lockoffset = lockoffset; | |
3333 | memset(&t, 0, sizeof(t)); | |
3334 | t.arg = wcb; | |
3335 | rfapiWithdrawTimerVPN(&t); /* frees wcb */ | |
65efcfce LB |
3336 | } |
3337 | ||
3338 | ||
d62a17ae | 3339 | /* |
9b6d8fcf | 3340 | * import a bgp_path_info if its route target list intersects with the |
65efcfce LB |
3341 | * import table's route target list |
3342 | */ | |
d62a17ae | 3343 | void rfapiBgpInfoFilteredImportVPN( |
3344 | struct rfapi_import_table *import_table, int action, struct peer *peer, | |
3345 | void *rfd, /* set for looped back routes */ | |
5a1ae2c2 DS |
3346 | const struct prefix *p, |
3347 | const struct prefix *aux_prefix, /* AFI_L2VPN: optional IP */ | |
d62a17ae | 3348 | afi_t afi, struct prefix_rd *prd, |
9b6d8fcf | 3349 | struct attr *attr, /* part of bgp_path_info */ |
5a1ae2c2 | 3350 | uint8_t type, /* part of bgp_path_info */ |
9b6d8fcf DS |
3351 | uint8_t sub_type, /* part of bgp_path_info */ |
3352 | uint32_t *label) /* part of bgp_path_info */ | |
65efcfce | 3353 | { |
fe08ba7e DS |
3354 | struct agg_table *rt = NULL; |
3355 | struct agg_node *rn; | |
3356 | struct agg_node *n; | |
4b7e6066 | 3357 | struct bgp_path_info *info_new; |
40381db7 | 3358 | struct bgp_path_info *bpi; |
4b7e6066 | 3359 | struct bgp_path_info *next; |
d62a17ae | 3360 | char buf[BUFSIZ]; |
3361 | struct prefix vn_prefix; | |
3362 | struct prefix un_prefix; | |
3363 | int un_prefix_valid = 0; | |
fe08ba7e | 3364 | struct agg_node *ern; |
d62a17ae | 3365 | int replacing = 0; |
3366 | int original_had_routes = 0; | |
3367 | struct prefix original_nexthop; | |
3368 | const char *action_str = NULL; | |
3369 | int is_it_ce = 0; | |
3370 | ||
3371 | struct bgp *bgp; | |
3372 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
3373 | ||
3374 | switch (action) { | |
3375 | case FIF_ACTION_UPDATE: | |
3376 | action_str = "update"; | |
3377 | break; | |
3378 | case FIF_ACTION_WITHDRAW: | |
3379 | action_str = "withdraw"; | |
3380 | break; | |
3381 | case FIF_ACTION_KILL: | |
3382 | action_str = "kill"; | |
3383 | break; | |
3384 | default: | |
3385 | assert(0); | |
3386 | break; | |
3387 | } | |
3388 | ||
3389 | if (import_table == bgp->rfapi->it_ce) | |
3390 | is_it_ce = 1; | |
3391 | ||
3392 | vnc_zlog_debug_verbose("%s: entry: %s%s: prefix %s/%d: it %p, afi %s", | |
3393 | __func__, (is_it_ce ? "CE-IT " : ""), action_str, | |
3394 | rfapi_ntop(p->family, &p->u.prefix, buf, BUFSIZ), | |
3395 | p->prefixlen, import_table, afi2str(afi)); | |
3396 | ||
3397 | VNC_ITRCCK; | |
3398 | ||
3399 | /* | |
3400 | * Compare rt lists. If no intersection, don't import this route | |
3401 | * On a withdraw, peer and RD are sufficient to determine if | |
3402 | * we should act. | |
3403 | */ | |
3404 | if (action == FIF_ACTION_UPDATE) { | |
b53e67a3 | 3405 | if (!attr || !bgp_attr_get_ecommunity(attr)) { |
d62a17ae | 3406 | |
3407 | vnc_zlog_debug_verbose( | |
3408 | "%s: attr, extra, or ecommunity missing, not importing", | |
3409 | __func__); | |
3410 | return; | |
3411 | } | |
b53e67a3 DA |
3412 | if ((import_table != bgp->rfapi->it_ce) && |
3413 | !rfapiEcommunitiesIntersect( | |
3414 | import_table->rt_import_list, | |
3415 | bgp_attr_get_ecommunity(attr))) { | |
d62a17ae | 3416 | |
3417 | vnc_zlog_debug_verbose( | |
3418 | "%s: it=%p: no ecommunity intersection", | |
3419 | __func__, import_table); | |
3420 | return; | |
3421 | } | |
3422 | ||
3423 | memset(&vn_prefix, 0, | |
3424 | sizeof(vn_prefix)); /* keep valgrind happy */ | |
3425 | if (rfapiGetNexthop(attr, &vn_prefix)) { | |
3426 | /* missing nexthop address would be a bad, bad thing */ | |
3427 | vnc_zlog_debug_verbose("%s: missing nexthop", __func__); | |
3428 | return; | |
3429 | } | |
3430 | } | |
3431 | ||
3432 | /* | |
3433 | * Figure out which radix tree the route would go into | |
3434 | */ | |
3435 | switch (afi) { | |
3436 | case AFI_IP: | |
3437 | case AFI_IP6: | |
3438 | case AFI_L2VPN: | |
3439 | rt = import_table->imported_vpn[afi]; | |
3440 | break; | |
3441 | ||
3442 | default: | |
450971aa | 3443 | flog_err(EC_LIB_DEVELOPMENT, "%s: bad afi %d", __func__, afi); |
d62a17ae | 3444 | return; |
3445 | } | |
3446 | ||
3447 | /* clear it */ | |
3448 | memset(&original_nexthop, 0, sizeof(original_nexthop)); | |
3449 | ||
3450 | /* | |
fe08ba7e | 3451 | * agg_node_lookup returns a node only if there is at least |
d62a17ae | 3452 | * one route attached. |
3453 | */ | |
fe08ba7e | 3454 | rn = agg_node_lookup(rt, p); |
d62a17ae | 3455 | |
3456 | vnc_zlog_debug_verbose("%s: rn=%p", __func__, rn); | |
3457 | ||
3458 | if (rn) { | |
3459 | ||
3460 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, 1); | |
fe08ba7e | 3461 | agg_unlock_node(rn); /* undo lock in agg_node_lookup */ |
d62a17ae | 3462 | |
3463 | if (rn->info) | |
3464 | original_had_routes = 1; | |
3465 | ||
3466 | if (VNC_DEBUG(VERBOSE)) { | |
3467 | vnc_zlog_debug_verbose("%s: showing IT node on entry", | |
3468 | __func__); | |
3469 | rfapiShowItNode(NULL, rn); /* debug */ | |
3470 | } | |
3471 | ||
3472 | /* | |
3473 | * Look for same route (will have same RD and peer) | |
3474 | */ | |
40381db7 | 3475 | bpi = rfapiItBiIndexSearch(rn, prd, peer, aux_prefix); |
d62a17ae | 3476 | |
40381db7 | 3477 | if (bpi) { |
d62a17ae | 3478 | |
3479 | /* | |
3480 | * This was an old test when we iterated over the | |
40381db7 | 3481 | * BPIs linearly. Since we're now looking up with |
d62a17ae | 3482 | * RD and peer, comparing types should not be |
3483 | * needed. Changed to assertion. | |
3484 | * | |
3485 | * Compare types. Doing so prevents a RFP-originated | |
3486 | * route from matching an imported route, for example. | |
3487 | */ | |
40381db7 | 3488 | if (VNC_DEBUG(VERBOSE) && bpi->type != type) |
3af8cb57 | 3489 | /* should be handled by RDs, but warn for now */ |
40381db7 DS |
3490 | zlog_warn("%s: type mismatch! (bpi=%d, arg=%d)", |
3491 | __func__, bpi->type, type); | |
d62a17ae | 3492 | |
40381db7 | 3493 | vnc_zlog_debug_verbose("%s: found matching bpi", |
d62a17ae | 3494 | __func__); |
3495 | ||
3496 | /* | |
3497 | * In the special CE table, withdrawals occur without | |
3498 | * holddown | |
3499 | */ | |
3500 | if (import_table == bgp->rfapi->it_ce) { | |
40381db7 | 3501 | vnc_direct_bgp_del_route_ce(bgp, rn, bpi); |
d62a17ae | 3502 | if (action == FIF_ACTION_WITHDRAW) |
3503 | action = FIF_ACTION_KILL; | |
3504 | } | |
3505 | ||
3506 | if (action == FIF_ACTION_WITHDRAW) { | |
3507 | ||
40381db7 DS |
3508 | int washolddown = CHECK_FLAG(bpi->flags, |
3509 | BGP_PATH_REMOVED); | |
d62a17ae | 3510 | |
3511 | vnc_zlog_debug_verbose( | |
26a3ffd6 DS |
3512 | "%s: withdrawing at prefix %pRN%s", |
3513 | __func__, rn, | |
d62a17ae | 3514 | (washolddown |
3515 | ? " (already being withdrawn)" | |
3516 | : "")); | |
3517 | ||
3518 | VNC_ITRCCK; | |
3519 | if (!washolddown) { | |
3520 | rfapiBiStartWithdrawTimer( | |
40381db7 | 3521 | import_table, rn, bpi, afi, |
d62a17ae | 3522 | SAFI_MPLS_VPN, |
3523 | rfapiWithdrawTimerVPN); | |
3524 | ||
3525 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 3526 | bpi, import_table, afi, -1); |
d62a17ae | 3527 | import_table->holddown_count[afi] += 1; |
3528 | } | |
3529 | VNC_ITRCCK; | |
3530 | } else { | |
3531 | vnc_zlog_debug_verbose( | |
26a3ffd6 | 3532 | "%s: %s at prefix %pRN", __func__, |
d62a17ae | 3533 | ((action == FIF_ACTION_KILL) |
3534 | ? "killing" | |
3535 | : "replacing"), | |
26a3ffd6 | 3536 | rn); |
d62a17ae | 3537 | |
3538 | /* | |
3539 | * If this route is waiting to be deleted | |
3540 | * because of | |
3541 | * a previous withdraw, we must cancel its | |
3542 | * timer. | |
3543 | */ | |
40381db7 DS |
3544 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED) |
3545 | && bpi->extra->vnc.import.timer) { | |
d62a17ae | 3546 | |
b3d6bc6e MS |
3547 | struct thread **t = |
3548 | &(bpi->extra->vnc.import.timer); | |
3549 | struct rfapi_withdraw *wcb = (*t)->arg; | |
d62a17ae | 3550 | |
3551 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
3552 | thread_cancel(t); | |
3553 | ||
3554 | import_table->holddown_count[afi] -= 1; | |
3555 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 3556 | bpi, import_table, afi, 1); |
d62a17ae | 3557 | } |
3558 | /* | |
3559 | * decrement remote count (if route is remote) | |
3560 | * because | |
3561 | * we are going to remove it below | |
3562 | */ | |
40381db7 DS |
3563 | RFAPI_UPDATE_ITABLE_COUNT(bpi, import_table, |
3564 | afi, -1); | |
d62a17ae | 3565 | if (action == FIF_ACTION_UPDATE) { |
3566 | replacing = 1; | |
3567 | ||
3568 | /* | |
3569 | * make copy of original nexthop so we | |
3570 | * can see if it changed | |
3571 | */ | |
40381db7 | 3572 | rfapiGetNexthop(bpi->attr, |
d62a17ae | 3573 | &original_nexthop); |
3574 | ||
3575 | /* | |
40381db7 | 3576 | * remove bpi without doing any export |
d62a17ae | 3577 | * processing |
3578 | */ | |
40381db7 | 3579 | if (CHECK_FLAG(bpi->flags, |
1defdda8 | 3580 | BGP_PATH_VALID) |
40381db7 | 3581 | && VALID_INTERIOR_TYPE(bpi->type)) |
d62a17ae | 3582 | RFAPI_MONITOR_EXTERIOR(rn) |
3583 | ->valid_interior_count--; | |
40381db7 DS |
3584 | rfapiItBiIndexDel(rn, bpi); |
3585 | rfapiBgpInfoDetach(rn, bpi); | |
3586 | rfapiMonitorEncapDelete(bpi); | |
d62a17ae | 3587 | vnc_import_bgp_exterior_del_route_interior( |
40381db7 DS |
3588 | bgp, import_table, rn, bpi); |
3589 | rfapiBgpInfoFree(bpi); | |
d62a17ae | 3590 | } else { |
3591 | /* Kill */ | |
3592 | /* | |
40381db7 | 3593 | * remove bpi and do export processing |
d62a17ae | 3594 | */ |
3595 | import_table->holddown_count[afi] += 1; | |
40381db7 | 3596 | rfapiExpireVpnNow(import_table, rn, bpi, |
d62a17ae | 3597 | 0); |
3598 | } | |
3599 | } | |
3600 | } | |
3601 | } | |
3602 | ||
3603 | if (rn) | |
3604 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, replacing ? 1 : 0); | |
3605 | ||
3606 | if (action == FIF_ACTION_WITHDRAW || action == FIF_ACTION_KILL) { | |
3607 | VNC_ITRCCK; | |
3608 | return; | |
3609 | } | |
3610 | ||
3611 | info_new = | |
3612 | rfapiBgpInfoCreate(attr, peer, rfd, prd, type, sub_type, label); | |
3613 | ||
3614 | /* | |
3615 | * lookup un address in encap table | |
3616 | */ | |
fe08ba7e | 3617 | ern = agg_node_match(import_table->imported_encap[afi], &vn_prefix); |
d62a17ae | 3618 | if (ern) { |
3619 | rfapiCopyUnEncap2VPN(ern->info, info_new); | |
fe08ba7e | 3620 | agg_unlock_node(ern); /* undo lock in route_note_match */ |
d62a17ae | 3621 | } else { |
d62a17ae | 3622 | /* Not a big deal, just means VPN route got here first */ |
2dbe669b DA |
3623 | vnc_zlog_debug_verbose("%s: no encap route for vn addr %pFX", |
3624 | __func__, &vn_prefix); | |
c7ca5ccf | 3625 | info_new->extra->vnc.import.un_family = AF_UNSPEC; |
d62a17ae | 3626 | } |
3627 | ||
3628 | if (rn) { | |
3629 | if (!replacing) | |
fe08ba7e | 3630 | agg_lock_node(rn); |
d62a17ae | 3631 | } else { |
3632 | /* | |
3633 | * No need to increment reference count, so only "get" | |
3634 | * if the node is not there already | |
3635 | */ | |
fe08ba7e | 3636 | rn = agg_node_get(rt, p); |
d62a17ae | 3637 | } |
3638 | ||
3639 | /* | |
3640 | * For ethernet routes, if there is an accompanying IP address, | |
40381db7 | 3641 | * save it in the bpi |
d62a17ae | 3642 | */ |
3643 | if ((AFI_L2VPN == afi) && aux_prefix) { | |
3644 | ||
40381db7 DS |
3645 | vnc_zlog_debug_verbose("%s: setting BPI's aux_prefix", |
3646 | __func__); | |
d62a17ae | 3647 | info_new->extra->vnc.import.aux_prefix = *aux_prefix; |
3648 | } | |
3649 | ||
26a3ffd6 | 3650 | vnc_zlog_debug_verbose("%s: inserting bpi %p at prefix %pRN #%d", |
c10e14e9 DS |
3651 | __func__, info_new, rn, |
3652 | agg_node_get_lock_count(rn)); | |
d62a17ae | 3653 | |
3654 | rfapiBgpInfoAttachSorted(rn, info_new, afi, SAFI_MPLS_VPN); | |
3655 | rfapiItBiIndexAdd(rn, info_new); | |
3656 | if (!rfapiGetUnAddrOfVpnBi(info_new, NULL)) { | |
3657 | if (VALID_INTERIOR_TYPE(info_new->type)) | |
3658 | RFAPI_MONITOR_EXTERIOR(rn)->valid_interior_count++; | |
1defdda8 | 3659 | SET_FLAG(info_new->flags, BGP_PATH_VALID); |
d62a17ae | 3660 | } |
3661 | RFAPI_UPDATE_ITABLE_COUNT(info_new, import_table, afi, 1); | |
3662 | vnc_import_bgp_exterior_add_route_interior(bgp, import_table, rn, | |
3663 | info_new); | |
3664 | ||
3665 | if (import_table == bgp->rfapi->it_ce) | |
3666 | vnc_direct_bgp_add_route_ce(bgp, rn, info_new); | |
3667 | ||
3668 | if (VNC_DEBUG(VERBOSE)) { | |
3669 | vnc_zlog_debug_verbose("%s: showing IT node", __func__); | |
3670 | rfapiShowItNode(NULL, rn); /* debug */ | |
3671 | } | |
3672 | ||
3673 | rfapiMonitorEncapAdd(import_table, &vn_prefix, rn, info_new); | |
3674 | ||
3675 | if (!rfapiGetUnAddrOfVpnBi(info_new, &un_prefix)) { | |
3676 | ||
3677 | /* | |
3678 | * if we have a valid UN address (either via Encap route | |
3679 | * or via tunnel attribute), then we should attempt | |
3680 | * to move any monitors at less-specific nodes to this node | |
3681 | */ | |
3682 | rfapiMonitorMoveLonger(rn); | |
3683 | ||
3684 | un_prefix_valid = 1; | |
3685 | } | |
3686 | ||
3687 | /* | |
3688 | * 101129 Enhancement: if we add a route (implication: it is not | |
3689 | * in holddown), delete all other routes from this nve at this | |
3690 | * node that are in holddown, regardless of peer. | |
3691 | * | |
3692 | * Reasons it's OK to do that: | |
3693 | * | |
3694 | * - if the holddown route being deleted originally came from BGP VPN, | |
3695 | * it is already gone from BGP (implication of holddown), so there | |
3696 | * won't be any added inconsistency with the BGP RIB. | |
3697 | * | |
3698 | * - once a fresh route is added at a prefix, any routes in holddown | |
3699 | * at that prefix will not show up in RFP responses, so deleting | |
3700 | * the holddown routes won't affect the contents of responses. | |
3701 | * | |
3702 | * - lifetimes are supposed to be consistent, so there should not | |
3703 | * be a case where the fresh route has a shorter lifetime than | |
3704 | * the holddown route, so we don't expect the fresh route to | |
3705 | * disappear and complete its holddown time before the existing | |
3706 | * holddown routes time out. Therefore, we won't have a situation | |
3707 | * where we expect the existing holddown routes to be hidden and | |
3708 | * then to reappear sometime later (as holddown routes) in a | |
3709 | * RFP response. | |
3710 | * | |
3711 | * Among other things, this would enable us to skirt the problem | |
3712 | * of local holddown routes that refer to NVE descriptors that | |
3713 | * have already been closed (if the same NVE triggers a subsequent | |
3714 | * rfapi_open(), the new peer is different and doesn't match the | |
3715 | * peer of the holddown route, so the stale holddown route still | |
3716 | * hangs around until it times out instead of just being replaced | |
3717 | * by the fresh route). | |
3718 | */ | |
3719 | /* | |
40381db7 | 3720 | * We know that the new bpi will have been inserted before any routes |
d62a17ae | 3721 | * in holddown, so we can skip any that came before it |
3722 | */ | |
40381db7 | 3723 | for (bpi = info_new->next; bpi; bpi = next) { |
d62a17ae | 3724 | |
3725 | struct prefix pfx_vn; | |
3726 | struct prefix pfx_un; | |
3727 | int un_match = 0; | |
3728 | int remote_peer_match = 0; | |
3729 | ||
40381db7 | 3730 | next = bpi->next; |
d62a17ae | 3731 | |
3732 | /* | |
3733 | * Must be holddown | |
3734 | */ | |
40381db7 | 3735 | if (!CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) |
d62a17ae | 3736 | continue; |
3737 | ||
3738 | /* | |
3739 | * Must match VN address (nexthop of VPN route) | |
3740 | */ | |
40381db7 | 3741 | if (rfapiGetNexthop(bpi->attr, &pfx_vn)) |
d62a17ae | 3742 | continue; |
3743 | if (!prefix_same(&pfx_vn, &vn_prefix)) | |
3744 | continue; | |
3745 | ||
3746 | if (un_prefix_valid && /* new route UN addr */ | |
40381db7 | 3747 | !rfapiGetUnAddrOfVpnBi(bpi, &pfx_un) |
d62a17ae | 3748 | && /* old route UN addr */ |
3749 | prefix_same(&pfx_un, &un_prefix)) { /* compare */ | |
3750 | un_match = 1; | |
3751 | } | |
40381db7 DS |
3752 | if (!RFAPI_LOCAL_BI(bpi) && !RFAPI_LOCAL_BI(info_new) |
3753 | && sockunion_same(&bpi->peer->su, &info_new->peer->su)) { | |
d62a17ae | 3754 | /* old & new are both remote, same peer */ |
3755 | remote_peer_match = 1; | |
3756 | } | |
3757 | ||
3758 | if (!un_match & !remote_peer_match) | |
3759 | continue; | |
3760 | ||
3761 | vnc_zlog_debug_verbose( | |
40381db7 | 3762 | "%s: removing holddown bpi matching NVE of new route", |
d62a17ae | 3763 | __func__); |
40381db7 | 3764 | if (bpi->extra->vnc.import.timer) { |
b3d6bc6e MS |
3765 | struct thread **t = |
3766 | &(bpi->extra->vnc.import.timer); | |
3767 | struct rfapi_withdraw *wcb = (*t)->arg; | |
d62a17ae | 3768 | |
3769 | XFREE(MTYPE_RFAPI_WITHDRAW, wcb); | |
3770 | thread_cancel(t); | |
3771 | } | |
40381db7 | 3772 | rfapiExpireVpnNow(import_table, rn, bpi, 0); |
d62a17ae | 3773 | } |
3774 | ||
3775 | if (!original_had_routes) { | |
3776 | /* | |
3777 | * We went from 0 usable routes to 1 usable route. Perform the | |
3778 | * "Adding a Route" export process. | |
3779 | */ | |
3780 | vnc_direct_bgp_add_prefix(bgp, import_table, rn); | |
3781 | vnc_zebra_add_prefix(bgp, import_table, rn); | |
3782 | } else { | |
3783 | /* | |
3784 | * Check for nexthop change event | |
3785 | * Note: the prefix_same() test below detects two situations: | |
3786 | * 1. route is replaced, new route has different nexthop | |
3787 | * 2. new route is added (original_nexthop is 0) | |
3788 | */ | |
3789 | struct prefix new_nexthop; | |
3790 | ||
3791 | rfapiGetNexthop(attr, &new_nexthop); | |
3792 | if (!prefix_same(&original_nexthop, &new_nexthop)) { | |
3793 | /* | |
3794 | * nexthop change event | |
3795 | * vnc_direct_bgp_add_prefix() will recompute VN addr | |
3796 | * ecommunity | |
3797 | */ | |
3798 | vnc_direct_bgp_add_prefix(bgp, import_table, rn); | |
3799 | } | |
3800 | } | |
3801 | ||
3802 | if (!(bgp->rfapi_cfg->flags & BGP_VNC_CONFIG_CALLBACK_DISABLE)) { | |
fe08ba7e | 3803 | for (n = rn; n; n = agg_node_parent(n)) { |
d62a17ae | 3804 | // rfapiDoRouteCallback(import_table, n, NULL); |
3805 | } | |
3806 | rfapiMonitorItNodeChanged(import_table, rn, NULL); | |
3807 | } | |
3808 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, 0); | |
3809 | VNC_ITRCCK; | |
65efcfce LB |
3810 | } |
3811 | ||
21cf6b21 VJ |
3812 | static void rfapiBgpInfoFilteredImportBadSafi( |
3813 | struct rfapi_import_table *import_table, int action, struct peer *peer, | |
3814 | void *rfd, /* set for looped back routes */ | |
5a1ae2c2 DS |
3815 | const struct prefix *p, |
3816 | const struct prefix *aux_prefix, /* AFI_L2VPN: optional IP */ | |
21cf6b21 | 3817 | afi_t afi, struct prefix_rd *prd, |
9b6d8fcf | 3818 | struct attr *attr, /* part of bgp_path_info */ |
5a1ae2c2 | 3819 | uint8_t type, /* part of bgp_path_info */ |
9b6d8fcf DS |
3820 | uint8_t sub_type, /* part of bgp_path_info */ |
3821 | uint32_t *label) /* part of bgp_path_info */ | |
21cf6b21 VJ |
3822 | { |
3823 | vnc_zlog_debug_verbose("%s: Error, bad safi", __func__); | |
3824 | } | |
3825 | ||
65efcfce | 3826 | static rfapi_bi_filtered_import_f * |
d62a17ae | 3827 | rfapiBgpInfoFilteredImportFunction(safi_t safi) |
65efcfce | 3828 | { |
d62a17ae | 3829 | switch (safi) { |
3830 | case SAFI_MPLS_VPN: | |
3831 | return rfapiBgpInfoFilteredImportVPN; | |
3832 | ||
3833 | case SAFI_ENCAP: | |
3834 | return rfapiBgpInfoFilteredImportEncap; | |
5c525538 RW |
3835 | |
3836 | default: | |
3837 | /* not expected */ | |
1c50c1c0 | 3838 | flog_err(EC_LIB_DEVELOPMENT, "%s: bad safi %d", __func__, safi); |
21cf6b21 | 3839 | return rfapiBgpInfoFilteredImportBadSafi; |
d62a17ae | 3840 | } |
65efcfce LB |
3841 | } |
3842 | ||
d62a17ae | 3843 | void rfapiProcessUpdate(struct peer *peer, |
3844 | void *rfd, /* set when looped from RFP/RFAPI */ | |
5a1ae2c2 | 3845 | const struct prefix *p, struct prefix_rd *prd, |
d7c0a89a QY |
3846 | struct attr *attr, afi_t afi, safi_t safi, uint8_t type, |
3847 | uint8_t sub_type, uint32_t *label) | |
65efcfce | 3848 | { |
d62a17ae | 3849 | struct bgp *bgp; |
3850 | struct rfapi *h; | |
3851 | struct rfapi_import_table *it; | |
3852 | int has_ip_route = 1; | |
3853 | uint32_t lni = 0; | |
3854 | ||
3855 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
3856 | assert(bgp); | |
3857 | ||
3858 | h = bgp->rfapi; | |
3859 | assert(h); | |
3860 | ||
3861 | /* | |
3862 | * look at high-order byte of RD. FF means MAC | |
3863 | * address is present (VNC L2VPN) | |
3864 | */ | |
3865 | if ((safi == SAFI_MPLS_VPN) | |
3866 | && (decode_rd_type(prd->val) == RD_TYPE_VNC_ETH)) { | |
3867 | struct prefix pfx_mac_buf; | |
3868 | struct prefix pfx_nexthop_buf; | |
3869 | int rc; | |
3870 | ||
3871 | /* | |
3872 | * Set flag if prefix and nexthop are the same - don't | |
3873 | * add the route to normal IP-based import tables | |
3874 | */ | |
3875 | if (!rfapiGetNexthop(attr, &pfx_nexthop_buf)) { | |
3876 | if (!prefix_cmp(&pfx_nexthop_buf, p)) { | |
3877 | has_ip_route = 0; | |
3878 | } | |
3879 | } | |
3880 | ||
3881 | memset(&pfx_mac_buf, 0, sizeof(pfx_mac_buf)); | |
3882 | pfx_mac_buf.family = AF_ETHERNET; | |
3883 | pfx_mac_buf.prefixlen = 48; | |
3884 | memcpy(&pfx_mac_buf.u.prefix_eth.octet, prd->val + 2, 6); | |
3885 | ||
3886 | /* | |
3887 | * Find rt containing LNI (Logical Network ID), which | |
3888 | * _should_ always be present when mac address is present | |
3889 | */ | |
b53e67a3 | 3890 | rc = rfapiEcommunityGetLNI(bgp_attr_get_ecommunity(attr), &lni); |
d62a17ae | 3891 | |
3892 | vnc_zlog_debug_verbose( | |
3893 | "%s: rfapiEcommunityGetLNI returned %d, lni=%d, attr=%p", | |
3894 | __func__, rc, lni, attr); | |
8cea9547 | 3895 | if (!rc) { |
d62a17ae | 3896 | it = rfapiMacImportTableGet(bgp, lni); |
3897 | ||
3898 | rfapiBgpInfoFilteredImportVPN( | |
3899 | it, FIF_ACTION_UPDATE, peer, rfd, | |
3900 | &pfx_mac_buf, /* prefix */ | |
3901 | p, /* aux prefix: IP addr */ | |
3902 | AFI_L2VPN, prd, attr, type, sub_type, label); | |
3903 | } | |
3904 | } | |
3905 | ||
3906 | if (!has_ip_route) | |
3907 | return; | |
3908 | ||
3909 | /* | |
3910 | * Iterate over all import tables; do a filtered import | |
3911 | * for the afi/safi combination | |
3912 | */ | |
3913 | for (it = h->imports; it; it = it->next) { | |
3914 | (*rfapiBgpInfoFilteredImportFunction(safi))( | |
3915 | it, FIF_ACTION_UPDATE, peer, rfd, p, /* prefix */ | |
3916 | NULL, afi, prd, attr, type, sub_type, label); | |
3917 | } | |
3918 | ||
3919 | if (safi == SAFI_MPLS_VPN) { | |
3920 | vnc_direct_bgp_rh_add_route(bgp, afi, p, peer, attr); | |
d62a17ae | 3921 | rfapiBgpInfoFilteredImportVPN( |
3922 | bgp->rfapi->it_ce, FIF_ACTION_UPDATE, peer, rfd, | |
3923 | p, /* prefix */ | |
3924 | NULL, afi, prd, attr, type, sub_type, label); | |
3925 | } | |
65efcfce LB |
3926 | } |
3927 | ||
3928 | ||
5a1ae2c2 | 3929 | void rfapiProcessWithdraw(struct peer *peer, void *rfd, const struct prefix *p, |
d62a17ae | 3930 | struct prefix_rd *prd, struct attr *attr, afi_t afi, |
d7c0a89a | 3931 | safi_t safi, uint8_t type, int kill) |
65efcfce | 3932 | { |
d62a17ae | 3933 | struct bgp *bgp; |
3934 | struct rfapi *h; | |
3935 | struct rfapi_import_table *it; | |
3936 | ||
3937 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
3938 | assert(bgp); | |
3939 | ||
3940 | h = bgp->rfapi; | |
3941 | assert(h); | |
3942 | ||
3943 | /* | |
3944 | * look at high-order byte of RD. FF means MAC | |
3945 | * address is present (VNC L2VPN) | |
3946 | */ | |
3947 | if (h->import_mac != NULL && safi == SAFI_MPLS_VPN | |
3948 | && decode_rd_type(prd->val) == RD_TYPE_VNC_ETH) { | |
3949 | struct prefix pfx_mac_buf; | |
3950 | void *cursor = NULL; | |
3951 | int rc; | |
3952 | ||
3953 | memset(&pfx_mac_buf, 0, sizeof(pfx_mac_buf)); | |
3954 | pfx_mac_buf.family = AF_ETHERNET; | |
3955 | pfx_mac_buf.prefixlen = 48; | |
3956 | memcpy(&pfx_mac_buf.u.prefix_eth, prd->val + 2, 6); | |
3957 | ||
3958 | /* | |
3959 | * withdraw does not contain attrs, so we don't have | |
3960 | * access to the route's LNI, which would ordinarily | |
3961 | * select the specific mac-based import table. Instead, | |
3962 | * we must iterate over all mac-based tables and rely | |
3963 | * on the RD to match. | |
3964 | * | |
3965 | * If this approach is too slow, add an index where | |
3966 | * key is {RD, peer} and value is the import table | |
3967 | */ | |
3968 | for (rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
3969 | &cursor); | |
3970 | rc == 0; rc = skiplist_next(h->import_mac, NULL, | |
3971 | (void **)&it, &cursor)) { | |
65efcfce | 3972 | |
1e20238a | 3973 | #ifdef DEBUG_L2_EXTRA |
d62a17ae | 3974 | vnc_zlog_debug_verbose( |
3975 | "%s: calling rfapiBgpInfoFilteredImportVPN(it=%p, afi=AFI_L2VPN)", | |
3976 | __func__, it); | |
65efcfce LB |
3977 | #endif |
3978 | ||
d62a17ae | 3979 | rfapiBgpInfoFilteredImportVPN( |
3980 | it, | |
3981 | (kill ? FIF_ACTION_KILL : FIF_ACTION_WITHDRAW), | |
3982 | peer, rfd, &pfx_mac_buf, /* prefix */ | |
3983 | p, /* aux_prefix: IP */ | |
3984 | AFI_L2VPN, prd, attr, type, 0, | |
3985 | NULL); /* sub_type & label unused for withdraw | |
9d303b37 | 3986 | */ |
d62a17ae | 3987 | } |
3988 | } | |
3989 | ||
3990 | /* | |
3991 | * XXX For the case where the withdraw involves an L2 | |
3992 | * route with no IP information, we rely on the lack | |
3993 | * of RT-list intersection to filter out the withdraw | |
3994 | * from the IP-based import tables below | |
3995 | */ | |
3996 | ||
3997 | /* | |
3998 | * Iterate over all import tables; do a filtered import | |
3999 | * for the afi/safi combination | |
4000 | */ | |
4001 | ||
4002 | for (it = h->imports; it; it = it->next) { | |
4003 | (*rfapiBgpInfoFilteredImportFunction(safi))( | |
4004 | it, (kill ? FIF_ACTION_KILL : FIF_ACTION_WITHDRAW), | |
4005 | peer, rfd, p, /* prefix */ | |
4006 | NULL, afi, prd, attr, type, 0, | |
4007 | NULL); /* sub_type & label unused for withdraw */ | |
4008 | } | |
4009 | ||
4010 | /* TBD the deletion should happen after the lifetime expires */ | |
4011 | if (safi == SAFI_MPLS_VPN) | |
4012 | vnc_direct_bgp_rh_del_route(bgp, afi, p, peer); | |
4013 | ||
4014 | if (safi == SAFI_MPLS_VPN) { | |
4015 | rfapiBgpInfoFilteredImportVPN( | |
4016 | bgp->rfapi->it_ce, | |
4017 | (kill ? FIF_ACTION_KILL : FIF_ACTION_WITHDRAW), peer, | |
4018 | rfd, p, /* prefix */ | |
4019 | NULL, afi, prd, attr, type, 0, | |
4020 | NULL); /* sub_type & label unused for withdraw */ | |
4021 | } | |
65efcfce LB |
4022 | } |
4023 | ||
4024 | /* | |
4025 | * TBD optimized withdraw timer algorithm for case of many | |
4026 | * routes expiring at the same time due to peer drop. | |
4027 | */ | |
4028 | /* | |
40381db7 | 4029 | * 1. Visit all BPIs in all ENCAP import tables. |
65efcfce | 4030 | * |
40381db7 DS |
4031 | * a. If a bpi's peer is the failed peer, remove the bpi. |
4032 | * b. If the removed ENCAP bpi was first in the list of | |
4033 | * BPIs at this ENCAP node, loop over all monitors | |
65efcfce LB |
4034 | * at this node: |
4035 | * | |
4036 | * (1) for each ENCAP monitor, loop over all its | |
4037 | * VPN node monitors and set their RFAPI_MON_FLAG_NEEDCALLBACK | |
4038 | * flags. | |
4039 | * | |
40381db7 DS |
4040 | * 2. Visit all BPIs in all VPN import tables. |
4041 | * a. If a bpi's peer is the failed peer, remove the bpi. | |
65efcfce LB |
4042 | * b. loop over all the VPN node monitors and set their |
4043 | * RFAPI_MON_FLAG_NEEDCALLBACK flags | |
40381db7 | 4044 | * c. If there are no BPIs left at this VPN node, |
65efcfce LB |
4045 | * |
4046 | */ | |
4047 | ||
4048 | ||
4049 | /* surprise, this gets called from peer_delete(), from rfapi_close() */ | |
d62a17ae | 4050 | static void rfapiProcessPeerDownRt(struct peer *peer, |
4051 | struct rfapi_import_table *import_table, | |
4052 | afi_t afi, safi_t safi) | |
65efcfce | 4053 | { |
fe08ba7e | 4054 | struct agg_node *rn; |
40381db7 | 4055 | struct bgp_path_info *bpi; |
fe08ba7e | 4056 | struct agg_table *rt; |
cc9f21da | 4057 | void (*timer_service_func)(struct thread *); |
d62a17ae | 4058 | |
4059 | assert(afi == AFI_IP || afi == AFI_IP6); | |
4060 | ||
4061 | VNC_ITRCCK; | |
4062 | ||
4063 | switch (safi) { | |
4064 | case SAFI_MPLS_VPN: | |
4065 | rt = import_table->imported_vpn[afi]; | |
4066 | timer_service_func = rfapiWithdrawTimerVPN; | |
4067 | break; | |
4068 | case SAFI_ENCAP: | |
4069 | rt = import_table->imported_encap[afi]; | |
4070 | timer_service_func = rfapiWithdrawTimerEncap; | |
4071 | break; | |
4072 | default: | |
21fe4510 QY |
4073 | /* Suppress uninitialized variable warning */ |
4074 | rt = NULL; | |
4075 | timer_service_func = NULL; | |
d62a17ae | 4076 | assert(0); |
4077 | } | |
4078 | ||
4079 | ||
fe08ba7e | 4080 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
40381db7 DS |
4081 | for (bpi = rn->info; bpi; bpi = bpi->next) { |
4082 | if (bpi->peer == peer) { | |
d62a17ae | 4083 | |
40381db7 | 4084 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
d62a17ae | 4085 | /* already in holddown, skip */ |
4086 | continue; | |
4087 | } | |
4088 | ||
4089 | if (safi == SAFI_MPLS_VPN) { | |
4090 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 4091 | bpi, import_table, afi, -1); |
d62a17ae | 4092 | import_table->holddown_count[afi] += 1; |
4093 | } | |
40381db7 | 4094 | rfapiBiStartWithdrawTimer(import_table, rn, bpi, |
d62a17ae | 4095 | afi, safi, |
4096 | timer_service_func); | |
4097 | } | |
4098 | } | |
4099 | } | |
4100 | VNC_ITRCCK; | |
65efcfce LB |
4101 | } |
4102 | ||
d62a17ae | 4103 | /* |
65efcfce LB |
4104 | * This gets called when a peer connection drops. We have to remove |
4105 | * all the routes from this peer. | |
4106 | * | |
4107 | * Current approach is crude. TBD Optimize by setting fewer timers and | |
4108 | * grouping withdrawn routes so we can generate callbacks more | |
4109 | * efficiently. | |
4110 | */ | |
d62a17ae | 4111 | void rfapiProcessPeerDown(struct peer *peer) |
65efcfce | 4112 | { |
d62a17ae | 4113 | struct bgp *bgp; |
4114 | struct rfapi *h; | |
4115 | struct rfapi_import_table *it; | |
4116 | ||
4117 | /* | |
4118 | * If this peer is a "dummy" peer structure atached to a RFAPI | |
4119 | * nve_descriptor, we don't need to walk the import tables | |
4120 | * because the routes are already withdrawn by rfapi_close() | |
4121 | */ | |
4122 | if (CHECK_FLAG(peer->flags, PEER_FLAG_IS_RFAPI_HD)) | |
4123 | return; | |
4124 | ||
4125 | /* | |
40381db7 DS |
4126 | * 1. Visit all BPIs in all ENCAP import tables. |
4127 | * Start withdraw timer on the BPIs that match peer. | |
d62a17ae | 4128 | * |
40381db7 DS |
4129 | * 2. Visit All BPIs in all VPN import tables. |
4130 | * Start withdraw timer on the BPIs that match peer. | |
d62a17ae | 4131 | */ |
4132 | ||
4133 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
4134 | if (!bgp) | |
4135 | return; | |
4136 | ||
4137 | h = bgp->rfapi; | |
4138 | assert(h); | |
4139 | ||
4140 | for (it = h->imports; it; it = it->next) { | |
4141 | rfapiProcessPeerDownRt(peer, it, AFI_IP, SAFI_ENCAP); | |
4142 | rfapiProcessPeerDownRt(peer, it, AFI_IP6, SAFI_ENCAP); | |
4143 | rfapiProcessPeerDownRt(peer, it, AFI_IP, SAFI_MPLS_VPN); | |
4144 | rfapiProcessPeerDownRt(peer, it, AFI_IP6, SAFI_MPLS_VPN); | |
4145 | } | |
4146 | ||
4147 | if (h->it_ce) { | |
4148 | rfapiProcessPeerDownRt(peer, h->it_ce, AFI_IP, SAFI_MPLS_VPN); | |
4149 | rfapiProcessPeerDownRt(peer, h->it_ce, AFI_IP6, SAFI_MPLS_VPN); | |
4150 | } | |
65efcfce LB |
4151 | } |
4152 | ||
4153 | /* | |
4154 | * Import an entire RIB (for an afi/safi) to an import table RIB, | |
4155 | * filtered according to the import table's RT list | |
4156 | * | |
4157 | * TBD: does this function need additions to match rfapiProcessUpdate() | |
d62a17ae | 4158 | * for, e.g., L2 handling? |
65efcfce | 4159 | */ |
d62a17ae | 4160 | static void rfapiBgpTableFilteredImport(struct bgp *bgp, |
4161 | struct rfapi_import_table *it, | |
4162 | afi_t afi, safi_t safi) | |
65efcfce | 4163 | { |
9bcb3eef DS |
4164 | struct bgp_dest *dest1; |
4165 | struct bgp_dest *dest2; | |
d62a17ae | 4166 | |
4167 | /* Only these SAFIs have 2-level RIBS */ | |
4168 | assert(safi == SAFI_MPLS_VPN || safi == SAFI_ENCAP); | |
4169 | ||
4170 | /* | |
4171 | * Now visit all the rd nodes and the nodes of all the | |
4172 | * route tables attached to them, and import the routes | |
4173 | * if they have matching route targets | |
4174 | */ | |
9bcb3eef DS |
4175 | for (dest1 = bgp_table_top(bgp->rib[afi][safi]); dest1; |
4176 | dest1 = bgp_route_next(dest1)) { | |
d62a17ae | 4177 | |
9bcb3eef | 4178 | if (bgp_dest_has_bgp_path_info_data(dest1)) { |
6f94b685 | 4179 | |
9bcb3eef DS |
4180 | for (dest2 = bgp_table_top( |
4181 | bgp_dest_get_bgp_table_info(dest1)); | |
4182 | dest2; dest2 = bgp_route_next(dest2)) { | |
d62a17ae | 4183 | |
40381db7 | 4184 | struct bgp_path_info *bpi; |
d62a17ae | 4185 | |
9bcb3eef | 4186 | for (bpi = bgp_dest_get_bgp_path_info(dest2); |
6f94b685 | 4187 | bpi; bpi = bpi->next) { |
d7c0a89a | 4188 | uint32_t label = 0; |
d62a17ae | 4189 | |
40381db7 | 4190 | if (CHECK_FLAG(bpi->flags, |
1defdda8 | 4191 | BGP_PATH_REMOVED)) |
d62a17ae | 4192 | continue; |
4193 | ||
40381db7 | 4194 | if (bpi->extra) |
d62a17ae | 4195 | label = decode_label( |
40381db7 | 4196 | &bpi->extra->label[0]); |
d62a17ae | 4197 | (*rfapiBgpInfoFilteredImportFunction( |
4198 | safi))( | |
4199 | it, /* which import table */ | |
40381db7 | 4200 | FIF_ACTION_UPDATE, bpi->peer, |
9bcb3eef DS |
4201 | NULL, |
4202 | bgp_dest_get_prefix(dest2), | |
d62a17ae | 4203 | NULL, afi, |
b54892e0 | 4204 | (struct prefix_rd *) |
9bcb3eef DS |
4205 | bgp_dest_get_prefix( |
4206 | dest1), | |
40381db7 DS |
4207 | bpi->attr, bpi->type, |
4208 | bpi->sub_type, &label); | |
d62a17ae | 4209 | } |
4210 | } | |
4211 | } | |
4212 | } | |
65efcfce LB |
4213 | } |
4214 | ||
4215 | ||
4216 | /* per-bgp-instance rfapi data */ | |
d62a17ae | 4217 | struct rfapi *bgp_rfapi_new(struct bgp *bgp) |
65efcfce | 4218 | { |
d62a17ae | 4219 | struct rfapi *h; |
e7038dde | 4220 | afi_t afi; |
d62a17ae | 4221 | struct rfapi_rfp_cfg *cfg = NULL; |
4222 | struct rfapi_rfp_cb_methods *cbm = NULL; | |
4223 | ||
4224 | assert(bgp->rfapi_cfg == NULL); | |
4225 | ||
9f5dc319 | 4226 | h = XCALLOC(MTYPE_RFAPI, sizeof(struct rfapi)); |
d62a17ae | 4227 | |
4228 | for (afi = AFI_IP; afi < AFI_MAX; afi++) { | |
fe08ba7e | 4229 | h->un[afi] = agg_table_init(); |
d62a17ae | 4230 | } |
4231 | ||
4232 | /* | |
4233 | * initialize the ce import table | |
4234 | */ | |
4235 | h->it_ce = XCALLOC(MTYPE_RFAPI_IMPORTTABLE, | |
4236 | sizeof(struct rfapi_import_table)); | |
fe08ba7e DS |
4237 | h->it_ce->imported_vpn[AFI_IP] = agg_table_init(); |
4238 | h->it_ce->imported_vpn[AFI_IP6] = agg_table_init(); | |
4239 | h->it_ce->imported_encap[AFI_IP] = agg_table_init(); | |
4240 | h->it_ce->imported_encap[AFI_IP6] = agg_table_init(); | |
d62a17ae | 4241 | rfapiBgpTableFilteredImport(bgp, h->it_ce, AFI_IP, SAFI_MPLS_VPN); |
4242 | rfapiBgpTableFilteredImport(bgp, h->it_ce, AFI_IP6, SAFI_MPLS_VPN); | |
4243 | ||
4244 | /* | |
4245 | * Set up work queue for deferred rfapi_close operations | |
4246 | */ | |
4247 | h->deferred_close_q = | |
4248 | work_queue_new(bm->master, "rfapi deferred close"); | |
4249 | h->deferred_close_q->spec.workfunc = rfapi_deferred_close_workfunc; | |
4250 | h->deferred_close_q->spec.data = h; | |
4251 | ||
4252 | h->rfp = rfp_start(bm->master, &cfg, &cbm); | |
4253 | bgp->rfapi_cfg = bgp_rfapi_cfg_new(cfg); | |
4254 | if (cbm != NULL) { | |
4255 | h->rfp_methods = *cbm; | |
4256 | } | |
4257 | return h; | |
65efcfce LB |
4258 | } |
4259 | ||
d62a17ae | 4260 | void bgp_rfapi_destroy(struct bgp *bgp, struct rfapi *h) |
65efcfce | 4261 | { |
e7038dde | 4262 | afi_t afi; |
0ae6124f | 4263 | |
d62a17ae | 4264 | if (bgp == NULL || h == NULL) |
4265 | return; | |
4266 | ||
4267 | if (h->resolve_nve_nexthop) { | |
4268 | skiplist_free(h->resolve_nve_nexthop); | |
4269 | h->resolve_nve_nexthop = NULL; | |
4270 | } | |
4271 | ||
fe08ba7e DS |
4272 | agg_table_finish(h->it_ce->imported_vpn[AFI_IP]); |
4273 | agg_table_finish(h->it_ce->imported_vpn[AFI_IP6]); | |
4274 | agg_table_finish(h->it_ce->imported_encap[AFI_IP]); | |
4275 | agg_table_finish(h->it_ce->imported_encap[AFI_IP6]); | |
d62a17ae | 4276 | |
4277 | if (h->import_mac) { | |
4278 | struct rfapi_import_table *it; | |
4279 | void *cursor; | |
4280 | int rc; | |
4281 | ||
9d303b37 DL |
4282 | for (cursor = NULL, |
4283 | rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4284 | &cursor); | |
d62a17ae | 4285 | !rc; rc = skiplist_next(h->import_mac, NULL, (void **)&it, |
4286 | &cursor)) { | |
4287 | ||
4288 | rfapiImportTableFlush(it); | |
4289 | XFREE(MTYPE_RFAPI_IMPORTTABLE, it); | |
4290 | } | |
4291 | skiplist_free(h->import_mac); | |
4292 | h->import_mac = NULL; | |
4293 | } | |
4294 | ||
e208c8f9 | 4295 | work_queue_free_and_null(&h->deferred_close_q); |
d62a17ae | 4296 | |
4297 | if (h->rfp != NULL) | |
4298 | rfp_stop(h->rfp); | |
0ae6124f LB |
4299 | |
4300 | for (afi = AFI_IP; afi < AFI_MAX; afi++) { | |
fe08ba7e | 4301 | agg_table_finish(h->un[afi]); |
0ae6124f LB |
4302 | } |
4303 | ||
d62a17ae | 4304 | XFREE(MTYPE_RFAPI_IMPORTTABLE, h->it_ce); |
4305 | XFREE(MTYPE_RFAPI, h); | |
65efcfce LB |
4306 | } |
4307 | ||
4308 | struct rfapi_import_table * | |
d62a17ae | 4309 | rfapiImportTableRefAdd(struct bgp *bgp, struct ecommunity *rt_import_list, |
4310 | struct rfapi_nve_group_cfg *rfg) | |
65efcfce | 4311 | { |
d62a17ae | 4312 | struct rfapi *h; |
4313 | struct rfapi_import_table *it; | |
4314 | afi_t afi; | |
4315 | ||
4316 | h = bgp->rfapi; | |
4317 | assert(h); | |
4318 | ||
4319 | for (it = h->imports; it; it = it->next) { | |
4320 | if (ecommunity_cmp(it->rt_import_list, rt_import_list)) | |
4321 | break; | |
4322 | } | |
4323 | ||
4324 | vnc_zlog_debug_verbose("%s: matched it=%p", __func__, it); | |
4325 | ||
4326 | if (!it) { | |
4327 | it = XCALLOC(MTYPE_RFAPI_IMPORTTABLE, | |
4328 | sizeof(struct rfapi_import_table)); | |
d62a17ae | 4329 | it->next = h->imports; |
4330 | h->imports = it; | |
4331 | ||
4332 | it->rt_import_list = ecommunity_dup(rt_import_list); | |
4333 | it->rfg = rfg; | |
4334 | it->monitor_exterior_orphans = | |
63265b5c | 4335 | skiplist_new(0, NULL, prefix_free_lists); |
d62a17ae | 4336 | |
4337 | /* | |
4338 | * fill import route tables from RIBs | |
4339 | * | |
4340 | * Potential area for optimization. If this occurs when | |
4341 | * tables are large (e.g., the operator adds a nve group | |
4342 | * with a new RT list to a running system), it could take | |
4343 | * a while. | |
4344 | * | |
4345 | */ | |
4346 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
4347 | ||
fe08ba7e DS |
4348 | it->imported_vpn[afi] = agg_table_init(); |
4349 | it->imported_encap[afi] = agg_table_init(); | |
d62a17ae | 4350 | |
4351 | rfapiBgpTableFilteredImport(bgp, it, afi, | |
4352 | SAFI_MPLS_VPN); | |
4353 | rfapiBgpTableFilteredImport(bgp, it, afi, SAFI_ENCAP); | |
4354 | ||
4355 | vnc_import_bgp_exterior_redist_enable_it(bgp, afi, it); | |
4356 | } | |
4357 | } | |
4358 | ||
4359 | it->refcount += 1; | |
4360 | ||
4361 | return it; | |
65efcfce LB |
4362 | } |
4363 | ||
4364 | /* | |
4365 | * skiplist element free function | |
4366 | */ | |
d62a17ae | 4367 | static void delete_rem_pfx_na_free(void *na) |
65efcfce | 4368 | { |
d62a17ae | 4369 | uint32_t *pCounter = ((struct rfapi_nve_addr *)na)->info; |
65efcfce | 4370 | |
d62a17ae | 4371 | *pCounter += 1; |
4372 | XFREE(MTYPE_RFAPI_NVE_ADDR, na); | |
65efcfce LB |
4373 | } |
4374 | ||
4375 | /* | |
4376 | * Common deleter for IP and MAC import tables | |
4377 | */ | |
d62a17ae | 4378 | static void rfapiDeleteRemotePrefixesIt( |
4379 | struct bgp *bgp, struct rfapi_import_table *it, struct prefix *un, | |
4380 | struct prefix *vn, struct prefix *p, int delete_active, | |
4381 | int delete_holddown, uint32_t *pARcount, uint32_t *pAHcount, | |
4382 | uint32_t *pHRcount, uint32_t *pHHcount, | |
4383 | struct skiplist *uniq_active_nves, struct skiplist *uniq_holddown_nves) | |
65efcfce | 4384 | { |
d62a17ae | 4385 | afi_t afi; |
65efcfce | 4386 | |
1e20238a | 4387 | #ifdef DEBUG_L2_EXTRA |
d62a17ae | 4388 | { |
872ed4c7 | 4389 | char buf_pfx[PREFIX_STRLEN]; |
d62a17ae | 4390 | |
4391 | if (p) { | |
872ed4c7 | 4392 | prefix2str(p, buf_pfx, sizeof(buf_pfx)); |
d62a17ae | 4393 | } else { |
4394 | buf_pfx[0] = '*'; | |
4395 | buf_pfx[1] = 0; | |
4396 | } | |
4397 | ||
4398 | vnc_zlog_debug_verbose( | |
4399 | "%s: entry, p=%s, delete_active=%d, delete_holddown=%d", | |
4400 | __func__, buf_pfx, delete_active, delete_holddown); | |
4401 | } | |
65efcfce LB |
4402 | #endif |
4403 | ||
d62a17ae | 4404 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { |
4405 | ||
fe08ba7e DS |
4406 | struct agg_table *rt; |
4407 | struct agg_node *rn; | |
d62a17ae | 4408 | |
4409 | if (p && (family2afi(p->family) != afi)) { | |
4410 | continue; | |
4411 | } | |
4412 | ||
4413 | rt = it->imported_vpn[afi]; | |
4414 | if (!rt) | |
4415 | continue; | |
4416 | ||
4417 | vnc_zlog_debug_verbose("%s: scanning rt for afi=%d", __func__, | |
4418 | afi); | |
4419 | ||
fe08ba7e | 4420 | for (rn = agg_route_top(rt); rn; rn = agg_route_next(rn)) { |
40381db7 | 4421 | struct bgp_path_info *bpi; |
4b7e6066 | 4422 | struct bgp_path_info *next; |
26a3ffd6 | 4423 | const struct prefix *rn_p = agg_node_get_prefix(rn); |
d62a17ae | 4424 | |
2dbe669b DA |
4425 | if (p && VNC_DEBUG(IMPORT_DEL_REMOTE)) |
4426 | vnc_zlog_debug_any("%s: want %pFX, have %pRN", | |
4427 | __func__, p, rn); | |
d62a17ae | 4428 | |
26a3ffd6 | 4429 | if (p && prefix_cmp(p, rn_p)) |
d62a17ae | 4430 | continue; |
4431 | ||
26a3ffd6 | 4432 | vnc_zlog_debug_verbose("%s: rn pfx=%pRN", __func__, rn); |
d62a17ae | 4433 | |
4434 | /* TBD is this valid for afi == AFI_L2VPN? */ | |
4435 | RFAPI_CHECK_REFCOUNT(rn, SAFI_MPLS_VPN, 1); | |
4436 | ||
40381db7 DS |
4437 | for (bpi = rn->info; bpi; bpi = next) { |
4438 | next = bpi->next; | |
d62a17ae | 4439 | |
4440 | struct prefix qpt; | |
4441 | struct prefix qct; | |
4442 | int qpt_valid = 0; | |
4443 | int qct_valid = 0; | |
4444 | int is_active = 0; | |
4445 | ||
40381db7 DS |
4446 | vnc_zlog_debug_verbose("%s: examining bpi %p", |
4447 | __func__, bpi); | |
d62a17ae | 4448 | |
05864da7 DS |
4449 | if (!rfapiGetNexthop(bpi->attr, &qpt)) |
4450 | qpt_valid = 1; | |
4451 | ||
d62a17ae | 4452 | if (vn) { |
4453 | if (!qpt_valid | |
4454 | || !prefix_match(vn, &qpt)) { | |
1e20238a | 4455 | #ifdef DEBUG_L2_EXTRA |
d62a17ae | 4456 | vnc_zlog_debug_verbose( |
4457 | "%s: continue at vn && !qpt_valid || !prefix_match(vn, &qpt)", | |
4458 | __func__); | |
65efcfce | 4459 | #endif |
d62a17ae | 4460 | continue; |
4461 | } | |
4462 | } | |
65efcfce | 4463 | |
40381db7 | 4464 | if (!rfapiGetUnAddrOfVpnBi(bpi, &qct)) |
d62a17ae | 4465 | qct_valid = 1; |
65efcfce | 4466 | |
d62a17ae | 4467 | if (un) { |
4468 | if (!qct_valid | |
4469 | || !prefix_match(un, &qct)) { | |
1e20238a | 4470 | #ifdef DEBUG_L2_EXTRA |
d62a17ae | 4471 | vnc_zlog_debug_verbose( |
4472 | "%s: continue at un && !qct_valid || !prefix_match(un, &qct)", | |
4473 | __func__); | |
65efcfce | 4474 | #endif |
d62a17ae | 4475 | continue; |
4476 | } | |
4477 | } | |
4478 | ||
4479 | ||
4480 | /* | |
40381db7 | 4481 | * Blow bpi away |
d62a17ae | 4482 | */ |
4483 | /* | |
4484 | * If this route is waiting to be deleted | |
4485 | * because of | |
4486 | * a previous withdraw, we must cancel its | |
4487 | * timer. | |
4488 | */ | |
40381db7 | 4489 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) { |
d62a17ae | 4490 | if (!delete_holddown) |
4491 | continue; | |
40381db7 | 4492 | if (bpi->extra->vnc.import.timer) { |
d62a17ae | 4493 | |
b3d6bc6e MS |
4494 | struct thread **t = |
4495 | &(bpi->extra->vnc | |
4496 | .import.timer); | |
d62a17ae | 4497 | struct rfapi_withdraw *wcb = |
b3d6bc6e | 4498 | (*t)->arg; |
d62a17ae | 4499 | |
4500 | wcb->import_table | |
4501 | ->holddown_count[afi] -= | |
4502 | 1; | |
4503 | RFAPI_UPDATE_ITABLE_COUNT( | |
40381db7 | 4504 | bpi, wcb->import_table, |
d62a17ae | 4505 | afi, 1); |
4506 | XFREE(MTYPE_RFAPI_WITHDRAW, | |
4507 | wcb); | |
4508 | thread_cancel(t); | |
4509 | } | |
4510 | } else { | |
4511 | if (!delete_active) | |
4512 | continue; | |
4513 | is_active = 1; | |
4514 | } | |
4515 | ||
4516 | vnc_zlog_debug_verbose( | |
40381db7 DS |
4517 | "%s: deleting bpi %p (qct_valid=%d, qpt_valid=%d, delete_holddown=%d, delete_active=%d)", |
4518 | __func__, bpi, qct_valid, qpt_valid, | |
d62a17ae | 4519 | delete_holddown, delete_active); |
4520 | ||
4521 | ||
4522 | /* | |
4523 | * add nve to list | |
4524 | */ | |
4525 | if (qct_valid && qpt_valid) { | |
4526 | ||
4527 | struct rfapi_nve_addr na; | |
4528 | struct rfapi_nve_addr *nap; | |
4529 | ||
4530 | memset(&na, 0, sizeof(na)); | |
4531 | assert(!rfapiQprefix2Raddr(&qct, | |
4532 | &na.un)); | |
4533 | assert(!rfapiQprefix2Raddr(&qpt, | |
4534 | &na.vn)); | |
4535 | ||
4536 | if (skiplist_search( | |
4537 | (is_active | |
4538 | ? uniq_active_nves | |
4539 | : uniq_holddown_nves), | |
4540 | &na, (void **)&nap)) { | |
4541 | char line[BUFSIZ]; | |
4542 | ||
4543 | nap = XCALLOC( | |
4544 | MTYPE_RFAPI_NVE_ADDR, | |
4545 | sizeof(struct | |
4546 | rfapi_nve_addr)); | |
d62a17ae | 4547 | *nap = na; |
4548 | nap->info = is_active | |
4549 | ? pAHcount | |
4550 | : pHHcount; | |
4551 | skiplist_insert( | |
4552 | (is_active | |
4553 | ? uniq_active_nves | |
4554 | : uniq_holddown_nves), | |
4555 | nap, nap); | |
4556 | ||
4557 | rfapiNveAddr2Str(nap, line, | |
4558 | BUFSIZ); | |
4559 | } | |
4560 | } | |
4561 | ||
26a3ffd6 | 4562 | vnc_direct_bgp_rh_del_route(bgp, afi, rn_p, |
40381db7 | 4563 | bpi->peer); |
d62a17ae | 4564 | |
40381db7 | 4565 | RFAPI_UPDATE_ITABLE_COUNT(bpi, it, afi, -1); |
d62a17ae | 4566 | it->holddown_count[afi] += 1; |
40381db7 | 4567 | rfapiExpireVpnNow(it, rn, bpi, 1); |
d62a17ae | 4568 | |
4569 | vnc_zlog_debug_verbose( | |
4570 | "%s: incrementing count (is_active=%d)", | |
4571 | __func__, is_active); | |
4572 | ||
4573 | if (is_active) | |
4574 | ++*pARcount; | |
4575 | else | |
4576 | ++*pHRcount; | |
4577 | } | |
4578 | } | |
4579 | } | |
65efcfce LB |
4580 | } |
4581 | ||
4582 | ||
4583 | /* | |
4584 | * For use by the "clear vnc prefixes" command | |
4585 | */ | |
4586 | /*------------------------------------------ | |
4587 | * rfapiDeleteRemotePrefixes | |
4588 | * | |
4589 | * UI helper: For use by the "clear vnc prefixes" command | |
4590 | * | |
d62a17ae | 4591 | * input: |
65efcfce LB |
4592 | * un if set, tunnel must match this prefix |
4593 | * vn if set, nexthop prefix must match this prefix | |
4594 | * p if set, prefix must match this prefix | |
5ff06872 | 4595 | * it if set, only look in this import table |
65efcfce LB |
4596 | * |
4597 | * output | |
4598 | * pARcount number of active routes deleted | |
4599 | * pAHcount number of active nves deleted | |
4600 | * pHRcount number of holddown routes deleted | |
4601 | * pHHcount number of holddown nves deleted | |
4602 | * | |
4603 | * return value: | |
4604 | * void | |
4605 | --------------------------------------------*/ | |
d62a17ae | 4606 | void rfapiDeleteRemotePrefixes(struct prefix *un, struct prefix *vn, |
4607 | struct prefix *p, | |
4608 | struct rfapi_import_table *arg_it, | |
4609 | int delete_active, int delete_holddown, | |
4610 | uint32_t *pARcount, uint32_t *pAHcount, | |
4611 | uint32_t *pHRcount, uint32_t *pHHcount) | |
65efcfce | 4612 | { |
d62a17ae | 4613 | struct bgp *bgp; |
4614 | struct rfapi *h; | |
4615 | struct rfapi_import_table *it; | |
4616 | uint32_t deleted_holddown_route_count = 0; | |
4617 | uint32_t deleted_active_route_count = 0; | |
4618 | uint32_t deleted_holddown_nve_count = 0; | |
4619 | uint32_t deleted_active_nve_count = 0; | |
4620 | struct skiplist *uniq_holddown_nves; | |
4621 | struct skiplist *uniq_active_nves; | |
4622 | ||
4623 | VNC_ITRCCK; | |
4624 | ||
4625 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
4626 | /* If no bgp instantiated yet, no vnc prefixes exist */ | |
4627 | if (!bgp) | |
4628 | return; | |
4629 | ||
4630 | h = bgp->rfapi; | |
4631 | assert(h); | |
4632 | ||
4633 | uniq_holddown_nves = | |
4634 | skiplist_new(0, rfapi_nve_addr_cmp, delete_rem_pfx_na_free); | |
4635 | uniq_active_nves = | |
4636 | skiplist_new(0, rfapi_nve_addr_cmp, delete_rem_pfx_na_free); | |
4637 | ||
4638 | /* | |
4639 | * Iterate over all import tables; do a filtered import | |
4640 | * for the afi/safi combination | |
4641 | */ | |
4642 | ||
4643 | if (arg_it) | |
4644 | it = arg_it; | |
4645 | else | |
4646 | it = h->imports; | |
4647 | for (; it;) { | |
4648 | ||
4649 | vnc_zlog_debug_verbose( | |
4650 | "%s: calling rfapiDeleteRemotePrefixesIt() on (IP) import %p", | |
4651 | __func__, it); | |
4652 | ||
4653 | rfapiDeleteRemotePrefixesIt( | |
4654 | bgp, it, un, vn, p, delete_active, delete_holddown, | |
4655 | &deleted_active_route_count, &deleted_active_nve_count, | |
4656 | &deleted_holddown_route_count, | |
4657 | &deleted_holddown_nve_count, uniq_active_nves, | |
4658 | uniq_holddown_nves); | |
4659 | ||
4660 | if (arg_it) | |
4661 | it = NULL; | |
4662 | else | |
4663 | it = it->next; | |
4664 | } | |
4665 | ||
4666 | /* | |
4667 | * Now iterate over L2 import tables | |
4668 | */ | |
4669 | if (h->import_mac && !(p && (p->family != AF_ETHERNET))) { | |
4670 | ||
4671 | void *cursor = NULL; | |
4672 | int rc; | |
4673 | ||
9d303b37 DL |
4674 | for (cursor = NULL, |
4675 | rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4676 | &cursor); | |
d62a17ae | 4677 | !rc; rc = skiplist_next(h->import_mac, NULL, (void **)&it, |
4678 | &cursor)) { | |
4679 | ||
4680 | vnc_zlog_debug_verbose( | |
4681 | "%s: calling rfapiDeleteRemotePrefixesIt() on import_mac %p", | |
4682 | __func__, it); | |
4683 | ||
4684 | rfapiDeleteRemotePrefixesIt( | |
4685 | bgp, it, un, vn, p, delete_active, | |
4686 | delete_holddown, &deleted_active_route_count, | |
4687 | &deleted_active_nve_count, | |
4688 | &deleted_holddown_route_count, | |
4689 | &deleted_holddown_nve_count, uniq_active_nves, | |
4690 | uniq_holddown_nves); | |
4691 | } | |
4692 | } | |
4693 | ||
4694 | /* | |
4695 | * our custom element freeing function above counts as it deletes | |
4696 | */ | |
4697 | skiplist_free(uniq_holddown_nves); | |
4698 | skiplist_free(uniq_active_nves); | |
4699 | ||
4700 | if (pARcount) | |
4701 | *pARcount = deleted_active_route_count; | |
4702 | if (pAHcount) | |
4703 | *pAHcount = deleted_active_nve_count; | |
4704 | if (pHRcount) | |
4705 | *pHRcount = deleted_holddown_route_count; | |
4706 | if (pHHcount) | |
4707 | *pHHcount = deleted_holddown_nve_count; | |
4708 | ||
4709 | VNC_ITRCCK; | |
65efcfce LB |
4710 | } |
4711 | ||
4712 | /*------------------------------------------ | |
4713 | * rfapiCountRemoteRoutes | |
4714 | * | |
4715 | * UI helper: count VRF routes from BGP side | |
4716 | * | |
d62a17ae | 4717 | * input: |
65efcfce LB |
4718 | * |
4719 | * output | |
4720 | * pALRcount count of active local routes | |
4721 | * pARRcount count of active remote routes | |
4722 | * pHRcount count of holddown routes | |
4723 | * pIRcount count of direct imported routes | |
4724 | * | |
4725 | * return value: | |
4726 | * void | |
4727 | --------------------------------------------*/ | |
d62a17ae | 4728 | void rfapiCountAllItRoutes(int *pALRcount, /* active local routes */ |
4729 | int *pARRcount, /* active remote routes */ | |
4730 | int *pHRcount, /* holddown routes */ | |
4731 | int *pIRcount) /* imported routes */ | |
65efcfce | 4732 | { |
d62a17ae | 4733 | struct bgp *bgp; |
4734 | struct rfapi *h; | |
4735 | struct rfapi_import_table *it; | |
4736 | afi_t afi; | |
4737 | ||
4738 | int total_active_local = 0; | |
4739 | int total_active_remote = 0; | |
4740 | int total_holddown = 0; | |
4741 | int total_imported = 0; | |
4742 | ||
4743 | bgp = bgp_get_default(); /* assume 1 instance for now */ | |
4744 | assert(bgp); | |
4745 | ||
4746 | h = bgp->rfapi; | |
4747 | assert(h); | |
4748 | ||
4749 | /* | |
4750 | * Iterate over all import tables; do a filtered import | |
4751 | * for the afi/safi combination | |
4752 | */ | |
4753 | ||
4754 | for (it = h->imports; it; it = it->next) { | |
4755 | ||
4756 | for (afi = AFI_IP; afi < AFI_MAX; ++afi) { | |
4757 | ||
4758 | total_active_local += it->local_count[afi]; | |
4759 | total_active_remote += it->remote_count[afi]; | |
4760 | total_holddown += it->holddown_count[afi]; | |
4761 | total_imported += it->imported_count[afi]; | |
4762 | } | |
4763 | } | |
4764 | ||
4765 | void *cursor; | |
4766 | int rc; | |
4767 | ||
4768 | if (h->import_mac) { | |
9d303b37 DL |
4769 | for (cursor = NULL, |
4770 | rc = skiplist_next(h->import_mac, NULL, (void **)&it, | |
4771 | &cursor); | |
d62a17ae | 4772 | !rc; rc = skiplist_next(h->import_mac, NULL, (void **)&it, |
4773 | &cursor)) { | |
4774 | ||
4775 | total_active_local += it->local_count[AFI_L2VPN]; | |
4776 | total_active_remote += it->remote_count[AFI_L2VPN]; | |
4777 | total_holddown += it->holddown_count[AFI_L2VPN]; | |
4778 | total_imported += it->imported_count[AFI_L2VPN]; | |
4779 | } | |
4780 | } | |
4781 | ||
4782 | ||
4783 | if (pALRcount) { | |
4784 | *pALRcount = total_active_local; | |
4785 | } | |
4786 | if (pARRcount) { | |
4787 | *pARRcount = total_active_remote; | |
4788 | } | |
4789 | if (pHRcount) { | |
4790 | *pHRcount = total_holddown; | |
4791 | } | |
4792 | if (pIRcount) { | |
4793 | *pIRcount = total_imported; | |
4794 | } | |
65efcfce LB |
4795 | } |
4796 | ||
4797 | /*------------------------------------------ | |
4798 | * rfapiGetHolddownFromLifetime | |
4799 | * | |
4800 | * calculate holddown value based on lifetime | |
4801 | * | |
d62a17ae | 4802 | * input: |
65efcfce LB |
4803 | * lifetime lifetime |
4804 | * | |
4805 | * return value: | |
4806 | * Holddown value based on lifetime, holddown_factor, | |
4807 | * and RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY | |
4808 | * | |
4809 | --------------------------------------------*/ | |
4810 | /* hold down time maxes out at RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY */ | |
d62a17ae | 4811 | uint32_t rfapiGetHolddownFromLifetime(uint32_t lifetime) |
65efcfce | 4812 | { |
d62a17ae | 4813 | uint32_t factor; |
4814 | struct bgp *bgp; | |
4815 | ||
4816 | bgp = bgp_get_default(); | |
4817 | if (bgp && bgp->rfapi_cfg) | |
4818 | factor = bgp->rfapi_cfg->rfp_cfg.holddown_factor; | |
4819 | else | |
4820 | factor = RFAPI_RFP_CFG_DEFAULT_HOLDDOWN_FACTOR; | |
4821 | ||
4822 | if (factor < 100 || lifetime < RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY) | |
4823 | lifetime = lifetime * factor / 100; | |
4824 | if (lifetime < RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY) | |
4825 | return lifetime; | |
4826 | else | |
4827 | return RFAPI_LIFETIME_INFINITE_WITHDRAW_DELAY; | |
65efcfce | 4828 | } |